linux/arch/x86/kernel/e820.c

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/*
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
* Low level x86 E820 memory map handling functions.
*
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
* The firmware and bootloader passes us the "E820 table", which is the primary
* physical memory layout description available about x86 systems.
*
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
* The kernel takes the E820 memory layout and optionally modifies it with
* quirks and other tweaks, and feeds that into the generic Linux memory
* allocation code routines via a platform independent interface (memblock, etc.).
*/
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/init.h>
#include <linux/crash_dump.h>
#include <linux/export.h>
#include <linux/bootmem.h>
#include <linux/pfn.h>
#include <linux/suspend.h>
#include <linux/acpi.h>
#include <linux/firmware-map.h>
x86: Use memblock to replace early_res 1. replace find_e820_area with memblock_find_in_range 2. replace reserve_early with memblock_x86_reserve_range 3. replace free_early with memblock_x86_free_range. 4. NO_BOOTMEM will switch to use memblock too. 5. use _e820, _early wrap in the patch, in following patch, will replace them all 6. because memblock_x86_free_range support partial free, we can remove some special care 7. Need to make sure that memblock_find_in_range() is called after memblock_x86_fill() so adjust some calling later in setup.c::setup_arch() -- corruption_check and mptable_update -v2: Move reserve_brk() early Before fill_memblock_area, to avoid overlap between brk and memblock_find_in_range() that could happen We have more then 128 RAM entry in E820 tables, and memblock_x86_fill() could use memblock_find_in_range() to find a new place for memblock.memory.region array. and We don't need to use extend_brk() after fill_memblock_area() So move reserve_brk() early before fill_memblock_area(). -v3: Move find_smp_config early To make sure memblock_find_in_range not find wrong place, if BIOS doesn't put mptable in right place. -v4: Treat RESERVED_KERN as RAM in memblock.memory. and they are already in memblock.reserved already.. use __NOT_KEEP_MEMBLOCK to make sure memblock related code could be freed later. -v5: Generic version __memblock_find_in_range() is going from high to low, and for 32bit active_region for 32bit does include high pages need to replace the limit with memblock.default_alloc_limit, aka get_max_mapped() -v6: Use current_limit instead -v7: check with MEMBLOCK_ERROR instead of -1ULL or -1L -v8: Set memblock_can_resize early to handle EFI with more RAM entries -v9: update after kmemleak changes in mainline Suggested-by: David S. Miller <davem@davemloft.net> Suggested-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Suggested-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2010-08-26 04:39:17 +08:00
#include <linux/memblock.h>
#include <linux/sort.h>
#include <asm/e820/api.h>
x86: extend e820 ealy_res support 32bit move early_res related from e820_64.c to e820.c make edba detection to be done in head32.c remove smp_alloc_memory, because we have fixed trampoline address now. Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> arch/x86/kernel/e820.c | 214 ++++++++++++++++++++++++++++++++++++ arch/x86/kernel/e820_64.c | 196 -------------------------------- arch/x86/kernel/head32.c | 76 ++++++++++++ arch/x86/kernel/setup_32.c | 109 +++--------------- arch/x86/kernel/smpboot.c | 17 -- arch/x86/kernel/trampoline.c | 2 arch/x86/mach-voyager/voyager_smp.c | 9 - include/asm-x86/e820.h | 6 + include/asm-x86/e820_64.h | 9 - include/asm-x86/smp.h | 1 arch/x86/kernel/e820.c | 214 ++++++++++++++++++++++++++++++++++++ arch/x86/kernel/e820_64.c | 196 -------------------------------- arch/x86/kernel/head32.c | 76 ++++++++++++ arch/x86/kernel/setup_32.c | 109 +++--------------- arch/x86/kernel/smpboot.c | 17 -- arch/x86/kernel/trampoline.c | 2 arch/x86/mach-voyager/voyager_smp.c | 9 - include/asm-x86/e820.h | 6 + include/asm-x86/e820_64.h | 9 - include/asm-x86/smp.h | 1 arch/x86/kernel/e820.c | 214 ++++++++++++++++++++++++++++++++++++ arch/x86/kernel/e820_64.c | 196 -------------------------------- arch/x86/kernel/head32.c | 76 ++++++++++++ arch/x86/kernel/setup_32.c | 109 +++--------------- arch/x86/kernel/smpboot.c | 17 -- arch/x86/kernel/trampoline.c | 2 arch/x86/mach-voyager/voyager_smp.c | 9 - include/asm-x86/e820.h | 6 + include/asm-x86/e820_64.h | 9 - include/asm-x86/smp.h | 1 10 files changed, 320 insertions(+), 319 deletions(-) Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-05-18 16:18:57 +08:00
#include <asm/proto.h>
#include <asm/setup.h>
#include <asm/cpufeature.h>
/*
x86/boot/e820: Rename e820_table_saved to e820_table_firmware and improve the description So the 'e820_table_saved' is a bit of a misnomer that hides its real purpose. At first sight the name suggests that it's some sort save/restore mechanism, as this is how we typically name such facilities in the kernel. But that is not so, e820_table_saved is the original firmware version of the e820 table, not modified by the kernel. This table is displayed in the /sys/firmware/memmap file, and it's also used by the hibernation code to calculate a physical memory layout MD5 fingerprint checksum which is invariant of the kernel. So rename it to 'e820_table_firmware' and update all the comments to better describe the main e820 data strutures. Also rename: 'initial_e820_table_saved' => 'e820_table_firmware_init' 'e820_update_range_saved' => 'e820_update_range_firmware' ... to better match the new nomenclature. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 17:07:49 +08:00
* We organize the E820 table into two main data structures:
*
* - 'e820_table_firmware': the original firmware version passed to us by the
* bootloader - not modified by the kernel. We use this to:
*
* - inform the user about the firmware's notion of memory layout
* via /sys/firmware/memmap
*
* - the hibernation code uses it to generate a kernel-independent MD5
* fingerprint of the physical memory layout of a system.
*
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
* - kexec, which is a bootloader in disguise, uses the original E820
x86/boot/e820: Rename e820_table_saved to e820_table_firmware and improve the description So the 'e820_table_saved' is a bit of a misnomer that hides its real purpose. At first sight the name suggests that it's some sort save/restore mechanism, as this is how we typically name such facilities in the kernel. But that is not so, e820_table_saved is the original firmware version of the e820 table, not modified by the kernel. This table is displayed in the /sys/firmware/memmap file, and it's also used by the hibernation code to calculate a physical memory layout MD5 fingerprint checksum which is invariant of the kernel. So rename it to 'e820_table_firmware' and update all the comments to better describe the main e820 data strutures. Also rename: 'initial_e820_table_saved' => 'e820_table_firmware_init' 'e820_update_range_saved' => 'e820_update_range_firmware' ... to better match the new nomenclature. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 17:07:49 +08:00
* layout to pass to the kexec-ed kernel. This way the original kernel
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
* can have a restricted E820 map while the kexec()-ed kexec-kernel
x86/boot/e820: Rename e820_table_saved to e820_table_firmware and improve the description So the 'e820_table_saved' is a bit of a misnomer that hides its real purpose. At first sight the name suggests that it's some sort save/restore mechanism, as this is how we typically name such facilities in the kernel. But that is not so, e820_table_saved is the original firmware version of the e820 table, not modified by the kernel. This table is displayed in the /sys/firmware/memmap file, and it's also used by the hibernation code to calculate a physical memory layout MD5 fingerprint checksum which is invariant of the kernel. So rename it to 'e820_table_firmware' and update all the comments to better describe the main e820 data strutures. Also rename: 'initial_e820_table_saved' => 'e820_table_firmware_init' 'e820_update_range_saved' => 'e820_update_range_firmware' ... to better match the new nomenclature. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 17:07:49 +08:00
* can have access to full memory - etc.
*
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
* - 'e820_table': this is the main E820 table that is massaged by the
x86/boot/e820: Rename e820_table_saved to e820_table_firmware and improve the description So the 'e820_table_saved' is a bit of a misnomer that hides its real purpose. At first sight the name suggests that it's some sort save/restore mechanism, as this is how we typically name such facilities in the kernel. But that is not so, e820_table_saved is the original firmware version of the e820 table, not modified by the kernel. This table is displayed in the /sys/firmware/memmap file, and it's also used by the hibernation code to calculate a physical memory layout MD5 fingerprint checksum which is invariant of the kernel. So rename it to 'e820_table_firmware' and update all the comments to better describe the main e820 data strutures. Also rename: 'initial_e820_table_saved' => 'e820_table_firmware_init' 'e820_update_range_saved' => 'e820_update_range_firmware' ... to better match the new nomenclature. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 17:07:49 +08:00
* low level x86 platform code, or modified by boot parameters, before
* passed on to higher level MM layers.
*
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
* Once the E820 map has been converted to the standard Linux memory layout
x86/boot/e820: Rename e820_table_saved to e820_table_firmware and improve the description So the 'e820_table_saved' is a bit of a misnomer that hides its real purpose. At first sight the name suggests that it's some sort save/restore mechanism, as this is how we typically name such facilities in the kernel. But that is not so, e820_table_saved is the original firmware version of the e820 table, not modified by the kernel. This table is displayed in the /sys/firmware/memmap file, and it's also used by the hibernation code to calculate a physical memory layout MD5 fingerprint checksum which is invariant of the kernel. So rename it to 'e820_table_firmware' and update all the comments to better describe the main e820 data strutures. Also rename: 'initial_e820_table_saved' => 'e820_table_firmware_init' 'e820_update_range_saved' => 'e820_update_range_firmware' ... to better match the new nomenclature. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 17:07:49 +08:00
* information its role stops - modifying it has no effect and does not get
* re-propagated. So itsmain role is a temporary bootstrap storage of firmware
* specific memory layout data during early bootup.
*/
x86/boot/e820: Rename e820_table_saved to e820_table_firmware and improve the description So the 'e820_table_saved' is a bit of a misnomer that hides its real purpose. At first sight the name suggests that it's some sort save/restore mechanism, as this is how we typically name such facilities in the kernel. But that is not so, e820_table_saved is the original firmware version of the e820 table, not modified by the kernel. This table is displayed in the /sys/firmware/memmap file, and it's also used by the hibernation code to calculate a physical memory layout MD5 fingerprint checksum which is invariant of the kernel. So rename it to 'e820_table_firmware' and update all the comments to better describe the main e820 data strutures. Also rename: 'initial_e820_table_saved' => 'e820_table_firmware_init' 'e820_update_range_saved' => 'e820_update_range_firmware' ... to better match the new nomenclature. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 17:07:49 +08:00
static struct e820_table e820_table_init __initdata;
static struct e820_table e820_table_firmware_init __initdata;
struct e820_table *e820_table __refdata = &e820_table_init;
struct e820_table *e820_table_firmware __refdata = &e820_table_firmware_init;
/* For PCI or other memory-mapped resources */
unsigned long pci_mem_start = 0xaeedbabe;
#ifdef CONFIG_PCI
EXPORT_SYMBOL(pci_mem_start);
#endif
/*
* This function checks if any part of the range <start,end> is mapped
* with type.
*/
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
int e820_any_mapped(u64 start, u64 end, unsigned type)
{
int i;
for (i = 0; i < e820_table->nr_entries; i++) {
struct e820_entry *ei = &e820_table->entries[i];
if (type && ei->type != type)
continue;
if (ei->addr >= end || ei->addr + ei->size <= start)
continue;
return 1;
}
return 0;
}
EXPORT_SYMBOL_GPL(e820_any_mapped);
/*
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
* This function checks if the entire <start,end> range is mapped with 'type'.
*
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
* Note: this function only works correctly once the E820 table is sorted and
* not-overlapping (at least for the range specified), which is the case normally.
*/
int __init e820_all_mapped(u64 start, u64 end, unsigned type)
{
int i;
for (i = 0; i < e820_table->nr_entries; i++) {
struct e820_entry *ei = &e820_table->entries[i];
if (type && ei->type != type)
continue;
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
/* Is the region (part) in overlap with the current region? */
if (ei->addr >= end || ei->addr + ei->size <= start)
continue;
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
/*
* If the region is at the beginning of <start,end> we move
* 'start' to the end of the region since it's ok until there
*/
if (ei->addr <= start)
start = ei->addr + ei->size;
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
/*
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
* If 'start' is now at or beyond 'end', we're done, full
* coverage of the desired range exists:
*/
if (start >= end)
return 1;
}
return 0;
}
/*
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
* Add a memory region to the kernel E820 map.
*/
static void __init __e820_add_region(struct e820_table *table, u64 start, u64 size, int type)
{
int x = table->nr_entries;
if (x >= ARRAY_SIZE(table->entries)) {
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
printk(KERN_ERR "e820: too many entries; ignoring [mem %#010llx-%#010llx]\n", start, start + size - 1);
return;
}
table->entries[x].addr = start;
table->entries[x].size = size;
table->entries[x].type = type;
table->nr_entries++;
}
void __init e820_add_region(u64 start, u64 size, int type)
{
__e820_add_region(e820_table, start, size, type);
}
static void __init e820_print_type(u32 type)
{
switch (type) {
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
case E820_RAM: /* Fall through: */
case E820_RESERVED_KERN: printk(KERN_CONT "usable"); break;
case E820_RESERVED: printk(KERN_CONT "reserved"); break;
case E820_ACPI: printk(KERN_CONT "ACPI data"); break;
case E820_NVS: printk(KERN_CONT "ACPI NVS"); break;
case E820_UNUSABLE: printk(KERN_CONT "unusable"); break;
case E820_PMEM: /* Fall through: */
case E820_PRAM: printk(KERN_CONT "persistent (type %u)", type); break;
default: printk(KERN_CONT "type %u", type); break;
}
}
void __init e820_print_map(char *who)
{
int i;
for (i = 0; i < e820_table->nr_entries; i++) {
printk(KERN_INFO "%s: [mem %#018Lx-%#018Lx] ", who,
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
e820_table->entries[i].addr,
e820_table->entries[i].addr + e820_table->entries[i].size - 1);
e820_print_type(e820_table->entries[i].type);
printk(KERN_CONT "\n");
}
}
/*
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
* Sanitize the BIOS E820 map.
*
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
* Some E820 responses include overlapping entries. The following
* replaces the original E820 map with a new one, removing overlaps,
* and resolving conflicting memory types in favor of highest
* numbered type.
*
* The input parameter biosmap points to an array of 'struct
x86/boot/e820: Rename the basic e820 data types to 'struct e820_entry' and 'struct e820_array' The 'e820entry' and 'e820map' names have various annoyances: - the missing underscore departs from the usual kernel style and makes the code look weird, - in the past I kept confusing the 'map' with the 'entry', because a 'map' is ambiguous in that regard, - it's not really clear from the 'e820map' that this is a regular C array. Rename them to 'struct e820_entry' and 'struct e820_array' accordingly. ( Leave the legacy UAPI header alone but do the rename in the bootparam.h and e820/types.h file - outside tools relying on these defines should either adjust their code, or should use the legacy header, or should create their private copies for the definitions. ) No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-27 19:54:38 +08:00
* e820_entry' which on entry has elements in the range [0, *pnr_map)
* valid, and which has space for up to max_nr_map entries.
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
* On return, the resulting sanitized E820 map entries will be in
* overwritten in the same location, starting at biosmap.
*
* The integer pointed to by pnr_map must be valid on entry (the
* current number of valid entries located at biosmap). If the
* sanitizing succeeds the *pnr_map will be updated with the new
* number of valid entries (something no more than max_nr_map).
*
* The return value from sanitize_e820_table() is zero if it
* successfully 'sanitized' the map entries passed in, and is -1
* if it did nothing, which can happen if either of (1) it was
* only passed one map entry, or (2) any of the input map entries
* were invalid (start + size < start, meaning that the size was
* so big the described memory range wrapped around through zero.)
*
* Visually we're performing the following
* (1,2,3,4 = memory types)...
*
* Sample memory map (w/overlaps):
* ____22__________________
* ______________________4_
* ____1111________________
* _44_____________________
* 11111111________________
* ____________________33__
* ___________44___________
* __________33333_________
* ______________22________
* ___________________2222_
* _________111111111______
* _____________________11_
* _________________4______
*
* Sanitized equivalent (no overlap):
* 1_______________________
* _44_____________________
* ___1____________________
* ____22__________________
* ______11________________
* _________1______________
* __________3_____________
* ___________44___________
* _____________33_________
* _______________2________
* ________________1_______
* _________________4______
* ___________________2____
* ____________________33__
* ______________________4_
*/
struct change_member {
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
/* Pointer to the original BIOS entry: */
struct e820_entry *pbios;
/* Address for this change point: */
unsigned long long addr;
};
static int __init cpcompare(const void *a, const void *b)
{
struct change_member * const *app = a, * const *bpp = b;
const struct change_member *ap = *app, *bp = *bpp;
/*
* Inputs are pointers to two elements of change_point[]. If their
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
* addresses are not equal, their difference dominates. If the addresses
* are equal, then consider one that represents the end of its region
* to be greater than one that does not.
*/
if (ap->addr != bp->addr)
return ap->addr > bp->addr ? 1 : -1;
return (ap->addr != ap->pbios->addr) - (bp->addr != bp->pbios->addr);
}
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
int __init sanitize_e820_table(struct e820_entry *biosmap, int max_nr_map, u32 *pnr_map)
{
static struct change_member change_point_list[2*E820_X_MAX] __initdata;
static struct change_member *change_point[2*E820_X_MAX] __initdata;
x86/boot/e820: Rename the basic e820 data types to 'struct e820_entry' and 'struct e820_array' The 'e820entry' and 'e820map' names have various annoyances: - the missing underscore departs from the usual kernel style and makes the code look weird, - in the past I kept confusing the 'map' with the 'entry', because a 'map' is ambiguous in that regard, - it's not really clear from the 'e820map' that this is a regular C array. Rename them to 'struct e820_entry' and 'struct e820_array' accordingly. ( Leave the legacy UAPI header alone but do the rename in the bootparam.h and e820/types.h file - outside tools relying on these defines should either adjust their code, or should use the legacy header, or should create their private copies for the definitions. ) No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-27 19:54:38 +08:00
static struct e820_entry *overlap_list[E820_X_MAX] __initdata;
static struct e820_entry new_bios[E820_X_MAX] __initdata;
unsigned long current_type, last_type;
unsigned long long last_addr;
int chgidx;
int overlap_entries;
int new_bios_entry;
int old_nr, new_nr, chg_nr;
int i;
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
/* If there's only one memory region, don't bother: */
if (*pnr_map < 2)
return -1;
old_nr = *pnr_map;
BUG_ON(old_nr > max_nr_map);
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
/* Bail out if we find any unreasonable addresses in the BIOS map: */
for (i = 0; i < old_nr; i++) {
if (biosmap[i].addr + biosmap[i].size < biosmap[i].addr)
return -1;
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
}
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
/* Create pointers for initial change-point information (for sorting): */
for (i = 0; i < 2 * old_nr; i++)
change_point[i] = &change_point_list[i];
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
/*
* Record all known change-points (starting and ending addresses),
* omitting empty memory regions:
*/
chgidx = 0;
for (i = 0; i < old_nr; i++) {
if (biosmap[i].size != 0) {
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
change_point[chgidx]->addr = biosmap[i].addr;
change_point[chgidx++]->pbios = &biosmap[i];
change_point[chgidx]->addr = biosmap[i].addr + biosmap[i].size;
change_point[chgidx++]->pbios = &biosmap[i];
}
}
chg_nr = chgidx;
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
/* Sort change-point list by memory addresses (low -> high): */
sort(change_point, chg_nr, sizeof *change_point, cpcompare, NULL);
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
/* Create a new BIOS memory map, removing overlaps: */
overlap_entries = 0; /* Number of entries in the overlap table */
new_bios_entry = 0; /* Index for creating new bios map entries */
last_type = 0; /* Start with undefined memory type */
last_addr = 0; /* Start with 0 as last starting address */
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
/* Loop through change-points, determining effect on the new BIOS map: */
for (chgidx = 0; chgidx < chg_nr; chgidx++) {
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
/* Keep track of all overlapping BIOS entries */
if (change_point[chgidx]->addr == change_point[chgidx]->pbios->addr) {
/* Add map entry to overlap list (> 1 entry implies an overlap) */
overlap_list[overlap_entries++] = change_point[chgidx]->pbios;
} else {
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
/* Remove entry from list (order independent, so swap with last): */
for (i = 0; i < overlap_entries; i++) {
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
if (overlap_list[i] == change_point[chgidx]->pbios)
overlap_list[i] = overlap_list[overlap_entries-1];
}
overlap_entries--;
}
/*
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
* If there are overlapping entries, decide which
* "type" to use (larger value takes precedence --
* 1=usable, 2,3,4,4+=unusable)
*/
current_type = 0;
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
for (i = 0; i < overlap_entries; i++) {
if (overlap_list[i]->type > current_type)
current_type = overlap_list[i]->type;
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
}
/* Continue building up new BIOS map based on this information: */
if (current_type != last_type || current_type == E820_PRAM) {
if (last_type != 0) {
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
new_bios[new_bios_entry].size = change_point[chgidx]->addr - last_addr;
/* Move forward only if the new size was non-zero: */
if (new_bios[new_bios_entry].size != 0)
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
/* No more space left for new BIOS entries? */
if (++new_bios_entry >= max_nr_map)
break;
}
if (current_type != 0) {
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
new_bios[new_bios_entry].addr = change_point[chgidx]->addr;
new_bios[new_bios_entry].type = current_type;
last_addr = change_point[chgidx]->addr;
}
last_type = current_type;
}
}
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
/* Retain count for new BIOS entries: */
new_nr = new_bios_entry;
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
/* Copy new BIOS mapping into the original location: */
memcpy(biosmap, new_bios, new_nr*sizeof(struct e820_entry));
*pnr_map = new_nr;
return 0;
}
static int __init __append_e820_table(struct e820_entry *biosmap, int nr_map)
{
while (nr_map) {
u64 start = biosmap->addr;
u64 size = biosmap->size;
u64 end = start + size - 1;
u32 type = biosmap->type;
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
/* Ignore the entry on 64-bit overflow: */
if (start > end && likely(size))
return -1;
e820_add_region(start, size, type);
biosmap++;
nr_map--;
}
return 0;
}
/*
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
* Copy the BIOS E820 map into a safe place.
*
* Sanity-check it while we're at it..
*
* If we're lucky and live on a modern system, the setup code
* will have given us a memory map that we can use to properly
* set up memory. If we aren't, we'll fake a memory map.
*/
static int __init append_e820_table(struct e820_entry *biosmap, int nr_map)
{
/* Only one memory region (or negative)? Ignore it */
if (nr_map < 2)
return -1;
return __append_e820_table(biosmap, nr_map);
}
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
static u64 __init
__e820_update_range(struct e820_table *table, u64 start, u64 size, unsigned old_type, unsigned new_type)
{
u64 end;
unsigned int i;
u64 real_updated_size = 0;
BUG_ON(old_type == new_type);
if (size > (ULLONG_MAX - start))
size = ULLONG_MAX - start;
end = start + size;
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
printk(KERN_DEBUG "e820: update [mem %#010Lx-%#010Lx] ", start, end - 1);
e820_print_type(old_type);
printk(KERN_CONT " ==> ");
e820_print_type(new_type);
printk(KERN_CONT "\n");
for (i = 0; i < table->nr_entries; i++) {
struct e820_entry *ei = &table->entries[i];
u64 final_start, final_end;
u64 ei_end;
if (ei->type != old_type)
continue;
ei_end = ei->addr + ei->size;
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
/* Completely covered by new range? */
if (ei->addr >= start && ei_end <= end) {
ei->type = new_type;
real_updated_size += ei->size;
continue;
}
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
/* New range is completely covered? */
if (ei->addr < start && ei_end > end) {
__e820_add_region(table, start, size, new_type);
__e820_add_region(table, end, ei_end - end, ei->type);
ei->size = start - ei->addr;
real_updated_size += size;
continue;
}
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
/* Partially covered: */
final_start = max(start, ei->addr);
final_end = min(end, ei_end);
if (final_start >= final_end)
continue;
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
__e820_add_region(table, final_start, final_end - final_start, new_type);
real_updated_size += final_end - final_start;
/*
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
* Left range could be head or tail, so need to update
* its size first:
*/
ei->size -= final_end - final_start;
if (ei->addr < final_start)
continue;
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
ei->addr = final_end;
}
return real_updated_size;
}
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
u64 __init e820_update_range(u64 start, u64 size, unsigned old_type, unsigned new_type)
{
return __e820_update_range(e820_table, start, size, old_type, new_type);
}
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
static u64 __init e820_update_range_firmware(u64 start, u64 size, unsigned old_type, unsigned new_type)
{
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
return __e820_update_range(e820_table_firmware, start, size, old_type, new_type);
}
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
/* Remove a range of memory from the E820 table: */
u64 __init e820_remove_range(u64 start, u64 size, unsigned old_type, int checktype)
{
int i;
u64 end;
u64 real_removed_size = 0;
if (size > (ULLONG_MAX - start))
size = ULLONG_MAX - start;
end = start + size;
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
printk(KERN_DEBUG "e820: remove [mem %#010Lx-%#010Lx] ", start, end - 1);
if (checktype)
e820_print_type(old_type);
printk(KERN_CONT "\n");
for (i = 0; i < e820_table->nr_entries; i++) {
struct e820_entry *ei = &e820_table->entries[i];
u64 final_start, final_end;
u64 ei_end;
if (checktype && ei->type != old_type)
continue;
ei_end = ei->addr + ei->size;
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
/* Completely covered? */
if (ei->addr >= start && ei_end <= end) {
real_removed_size += ei->size;
x86/boot/e820: Rename the basic e820 data types to 'struct e820_entry' and 'struct e820_array' The 'e820entry' and 'e820map' names have various annoyances: - the missing underscore departs from the usual kernel style and makes the code look weird, - in the past I kept confusing the 'map' with the 'entry', because a 'map' is ambiguous in that regard, - it's not really clear from the 'e820map' that this is a regular C array. Rename them to 'struct e820_entry' and 'struct e820_array' accordingly. ( Leave the legacy UAPI header alone but do the rename in the bootparam.h and e820/types.h file - outside tools relying on these defines should either adjust their code, or should use the legacy header, or should create their private copies for the definitions. ) No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-27 19:54:38 +08:00
memset(ei, 0, sizeof(struct e820_entry));
continue;
}
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
/* Is the new range completely covered? */
if (ei->addr < start && ei_end > end) {
e820_add_region(end, ei_end - end, ei->type);
ei->size = start - ei->addr;
real_removed_size += size;
continue;
}
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
/* Partially covered: */
final_start = max(start, ei->addr);
final_end = min(end, ei_end);
if (final_start >= final_end)
continue;
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
real_removed_size += final_end - final_start;
/*
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
* Left range could be head or tail, so need to update
* the size first:
*/
ei->size -= final_end - final_start;
if (ei->addr < final_start)
continue;
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
ei->addr = final_end;
}
return real_removed_size;
}
void __init update_e820(void)
{
if (sanitize_e820_table(e820_table->entries, ARRAY_SIZE(e820_table->entries), &e820_table->nr_entries))
return;
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
printk(KERN_INFO "e820: modified physical RAM map:\n");
e820_print_map("modified");
}
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
x86/boot/e820: Rename e820_table_saved to e820_table_firmware and improve the description So the 'e820_table_saved' is a bit of a misnomer that hides its real purpose. At first sight the name suggests that it's some sort save/restore mechanism, as this is how we typically name such facilities in the kernel. But that is not so, e820_table_saved is the original firmware version of the e820 table, not modified by the kernel. This table is displayed in the /sys/firmware/memmap file, and it's also used by the hibernation code to calculate a physical memory layout MD5 fingerprint checksum which is invariant of the kernel. So rename it to 'e820_table_firmware' and update all the comments to better describe the main e820 data strutures. Also rename: 'initial_e820_table_saved' => 'e820_table_firmware_init' 'e820_update_range_saved' => 'e820_update_range_firmware' ... to better match the new nomenclature. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 17:07:49 +08:00
static void __init update_e820_table_firmware(void)
{
x86/boot/e820: Rename e820_table_saved to e820_table_firmware and improve the description So the 'e820_table_saved' is a bit of a misnomer that hides its real purpose. At first sight the name suggests that it's some sort save/restore mechanism, as this is how we typically name such facilities in the kernel. But that is not so, e820_table_saved is the original firmware version of the e820 table, not modified by the kernel. This table is displayed in the /sys/firmware/memmap file, and it's also used by the hibernation code to calculate a physical memory layout MD5 fingerprint checksum which is invariant of the kernel. So rename it to 'e820_table_firmware' and update all the comments to better describe the main e820 data strutures. Also rename: 'initial_e820_table_saved' => 'e820_table_firmware_init' 'e820_update_range_saved' => 'e820_update_range_firmware' ... to better match the new nomenclature. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 17:07:49 +08:00
sanitize_e820_table(e820_table_firmware->entries, ARRAY_SIZE(e820_table_firmware->entries), &e820_table_firmware->nr_entries);
}
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
#define MAX_GAP_END 0x100000000ull
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
/*
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
* Search for a gap in the E820 memory space from 0 to MAX_GAP_END (4GB).
*/
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
static int __init e820_search_gap(unsigned long *gapstart, unsigned long *gapsize)
{
unsigned long long last = MAX_GAP_END;
int i = e820_table->nr_entries;
int found = 0;
while (--i >= 0) {
unsigned long long start = e820_table->entries[i].addr;
unsigned long long end = start + e820_table->entries[i].size;
/*
* Since "last" is at most 4GB, we know we'll
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
* fit in 32 bits if this condition is true:
*/
if (last > end) {
unsigned long gap = last - end;
if (gap >= *gapsize) {
*gapsize = gap;
*gapstart = end;
found = 1;
}
}
if (start < last)
last = start;
}
return found;
}
/*
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
* Search for the biggest gap in the low 32 bits of the E820
* memory space. We pass this space to the PCI subsystem, so
* that it can assign MMIO resources for hotplug or
* unconfigured devices in.
*
* Hopefully the BIOS let enough space left.
*/
__init void e820_setup_gap(void)
{
unsigned long gapstart, gapsize;
int found;
gapsize = 0x400000;
found = e820_search_gap(&gapstart, &gapsize);
if (!found) {
#ifdef CONFIG_X86_64
gapstart = (max_pfn << PAGE_SHIFT) + 1024*1024;
printk(KERN_ERR
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
"e820: Cannot find an available gap in the 32-bit address range\n"
"e820: PCI devices with unassigned 32-bit BARs may not work!\n");
#else
gapstart = 0x10000000;
#endif
}
/*
* e820_reserve_resources_late protect stolen RAM already
*/
pci_mem_start = gapstart;
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
printk(KERN_INFO "e820: [mem %#010lx-%#010lx] available for PCI devices\n", gapstart, gapstart + gapsize - 1);
}
/*
* Called late during init, in free_initmem().
*
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
* Initial e820_table and e820_table_firmware are largish __initdata arrays.
*
* Copy them to a (usually much smaller) dynamically allocated area that is
* sized precisely after the number of e820 entries.
*
* This is done after we've performed all the fixes and tweaks to the tables.
* All functions which modify them are __init functions, which won't exist
* after free_initmem().
*/
__init void e820_reallocate_tables(void)
{
struct e820_table *n;
int size;
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
size = offsetof(struct e820_table, entries) + sizeof(struct e820_entry)*e820_table->nr_entries;
n = kmalloc(size, GFP_KERNEL);
BUG_ON(!n);
memcpy(n, e820_table, size);
e820_table = n;
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
size = offsetof(struct e820_table, entries) + sizeof(struct e820_entry)*e820_table_firmware->nr_entries;
n = kmalloc(size, GFP_KERNEL);
BUG_ON(!n);
x86/boot/e820: Rename e820_table_saved to e820_table_firmware and improve the description So the 'e820_table_saved' is a bit of a misnomer that hides its real purpose. At first sight the name suggests that it's some sort save/restore mechanism, as this is how we typically name such facilities in the kernel. But that is not so, e820_table_saved is the original firmware version of the e820 table, not modified by the kernel. This table is displayed in the /sys/firmware/memmap file, and it's also used by the hibernation code to calculate a physical memory layout MD5 fingerprint checksum which is invariant of the kernel. So rename it to 'e820_table_firmware' and update all the comments to better describe the main e820 data strutures. Also rename: 'initial_e820_table_saved' => 'e820_table_firmware_init' 'e820_update_range_saved' => 'e820_update_range_firmware' ... to better match the new nomenclature. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 17:07:49 +08:00
memcpy(n, e820_table_firmware, size);
e820_table_firmware = n;
}
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
/*
* Because of the small fixed size of struct boot_params, only the first
* 128 E820 memory entries are passed to the kernel via boot_params.e820_table,
* the remaining (if any) entries are passed via the SETUP_E820_EXT node of
* struct setup_data, which is parsed here.
*/
void __init parse_e820_ext(u64 phys_addr, u32 data_len)
{
int entries;
x86/boot/e820: Rename the basic e820 data types to 'struct e820_entry' and 'struct e820_array' The 'e820entry' and 'e820map' names have various annoyances: - the missing underscore departs from the usual kernel style and makes the code look weird, - in the past I kept confusing the 'map' with the 'entry', because a 'map' is ambiguous in that regard, - it's not really clear from the 'e820map' that this is a regular C array. Rename them to 'struct e820_entry' and 'struct e820_array' accordingly. ( Leave the legacy UAPI header alone but do the rename in the bootparam.h and e820/types.h file - outside tools relying on these defines should either adjust their code, or should use the legacy header, or should create their private copies for the definitions. ) No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-27 19:54:38 +08:00
struct e820_entry *extmap;
struct setup_data *sdata;
sdata = early_memremap(phys_addr, data_len);
x86/boot/e820: Rename the basic e820 data types to 'struct e820_entry' and 'struct e820_array' The 'e820entry' and 'e820map' names have various annoyances: - the missing underscore departs from the usual kernel style and makes the code look weird, - in the past I kept confusing the 'map' with the 'entry', because a 'map' is ambiguous in that regard, - it's not really clear from the 'e820map' that this is a regular C array. Rename them to 'struct e820_entry' and 'struct e820_array' accordingly. ( Leave the legacy UAPI header alone but do the rename in the bootparam.h and e820/types.h file - outside tools relying on these defines should either adjust their code, or should use the legacy header, or should create their private copies for the definitions. ) No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-27 19:54:38 +08:00
entries = sdata->len / sizeof(struct e820_entry);
extmap = (struct e820_entry *)(sdata->data);
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
__append_e820_table(extmap, entries);
sanitize_e820_table(e820_table->entries, ARRAY_SIZE(e820_table->entries), &e820_table->nr_entries);
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
early_memunmap(sdata, data_len);
printk(KERN_INFO "e820: extended physical RAM map:\n");
e820_print_map("extended");
}
/**
* Find the ranges of physical addresses that do not correspond to
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
* E820 RAM areas and mark the corresponding pages as 'nosave' for
* hibernation (32-bit) or software suspend and suspend to RAM (64-bit).
*
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
* This function requires the E820 map to be sorted and without any
* overlapping entries.
*/
void __init e820_mark_nosave_regions(unsigned long limit_pfn)
{
int i;
unsigned long pfn = 0;
for (i = 0; i < e820_table->nr_entries; i++) {
struct e820_entry *ei = &e820_table->entries[i];
if (pfn < PFN_UP(ei->addr))
register_nosave_region(pfn, PFN_UP(ei->addr));
pfn = PFN_DOWN(ei->addr + ei->size);
if (ei->type != E820_RAM && ei->type != E820_RESERVED_KERN)
register_nosave_region(PFN_UP(ei->addr), pfn);
if (pfn >= limit_pfn)
break;
}
}
x86: extend e820 ealy_res support 32bit move early_res related from e820_64.c to e820.c make edba detection to be done in head32.c remove smp_alloc_memory, because we have fixed trampoline address now. Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> arch/x86/kernel/e820.c | 214 ++++++++++++++++++++++++++++++++++++ arch/x86/kernel/e820_64.c | 196 -------------------------------- arch/x86/kernel/head32.c | 76 ++++++++++++ arch/x86/kernel/setup_32.c | 109 +++--------------- arch/x86/kernel/smpboot.c | 17 -- arch/x86/kernel/trampoline.c | 2 arch/x86/mach-voyager/voyager_smp.c | 9 - include/asm-x86/e820.h | 6 + include/asm-x86/e820_64.h | 9 - include/asm-x86/smp.h | 1 arch/x86/kernel/e820.c | 214 ++++++++++++++++++++++++++++++++++++ arch/x86/kernel/e820_64.c | 196 -------------------------------- arch/x86/kernel/head32.c | 76 ++++++++++++ arch/x86/kernel/setup_32.c | 109 +++--------------- arch/x86/kernel/smpboot.c | 17 -- arch/x86/kernel/trampoline.c | 2 arch/x86/mach-voyager/voyager_smp.c | 9 - include/asm-x86/e820.h | 6 + include/asm-x86/e820_64.h | 9 - include/asm-x86/smp.h | 1 arch/x86/kernel/e820.c | 214 ++++++++++++++++++++++++++++++++++++ arch/x86/kernel/e820_64.c | 196 -------------------------------- arch/x86/kernel/head32.c | 76 ++++++++++++ arch/x86/kernel/setup_32.c | 109 +++--------------- arch/x86/kernel/smpboot.c | 17 -- arch/x86/kernel/trampoline.c | 2 arch/x86/mach-voyager/voyager_smp.c | 9 - include/asm-x86/e820.h | 6 + include/asm-x86/e820_64.h | 9 - include/asm-x86/smp.h | 1 10 files changed, 320 insertions(+), 319 deletions(-) Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-05-18 16:18:57 +08:00
#ifdef CONFIG_ACPI
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
/*
* Register ACPI NVS memory regions, so that we can save/restore them during
* hibernation and the subsequent resume:
*/
static int __init e820_mark_nvs_memory(void)
{
int i;
for (i = 0; i < e820_table->nr_entries; i++) {
struct e820_entry *ei = &e820_table->entries[i];
if (ei->type == E820_NVS)
acpi_nvs_register(ei->addr, ei->size);
}
return 0;
}
core_initcall(e820_mark_nvs_memory);
#endif
/*
x86/boot/e820: Rename e820_table_saved to e820_table_firmware and improve the description So the 'e820_table_saved' is a bit of a misnomer that hides its real purpose. At first sight the name suggests that it's some sort save/restore mechanism, as this is how we typically name such facilities in the kernel. But that is not so, e820_table_saved is the original firmware version of the e820 table, not modified by the kernel. This table is displayed in the /sys/firmware/memmap file, and it's also used by the hibernation code to calculate a physical memory layout MD5 fingerprint checksum which is invariant of the kernel. So rename it to 'e820_table_firmware' and update all the comments to better describe the main e820 data strutures. Also rename: 'initial_e820_table_saved' => 'e820_table_firmware_init' 'e820_update_range_saved' => 'e820_update_range_firmware' ... to better match the new nomenclature. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 17:07:49 +08:00
* pre allocated 4k and reserved it in memblock and e820_table_firmware
*/
u64 __init early_reserve_e820(u64 size, u64 align)
{
u64 addr;
addr = __memblock_alloc_base(size, align, MEMBLOCK_ALLOC_ACCESSIBLE);
if (addr) {
x86/boot/e820: Rename e820_table_saved to e820_table_firmware and improve the description So the 'e820_table_saved' is a bit of a misnomer that hides its real purpose. At first sight the name suggests that it's some sort save/restore mechanism, as this is how we typically name such facilities in the kernel. But that is not so, e820_table_saved is the original firmware version of the e820 table, not modified by the kernel. This table is displayed in the /sys/firmware/memmap file, and it's also used by the hibernation code to calculate a physical memory layout MD5 fingerprint checksum which is invariant of the kernel. So rename it to 'e820_table_firmware' and update all the comments to better describe the main e820 data strutures. Also rename: 'initial_e820_table_saved' => 'e820_table_firmware_init' 'e820_update_range_saved' => 'e820_update_range_firmware' ... to better match the new nomenclature. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 17:07:49 +08:00
e820_update_range_firmware(addr, size, E820_RAM, E820_RESERVED);
printk(KERN_INFO "e820: update e820_table_firmware for early_reserve_e820\n");
update_e820_table_firmware();
}
return addr;
}
#ifdef CONFIG_X86_32
# ifdef CONFIG_X86_PAE
# define MAX_ARCH_PFN (1ULL<<(36-PAGE_SHIFT))
# else
# define MAX_ARCH_PFN (1ULL<<(32-PAGE_SHIFT))
# endif
#else /* CONFIG_X86_32 */
# define MAX_ARCH_PFN MAXMEM>>PAGE_SHIFT
#endif
/*
* Find the highest page frame number we have available
*/
x86/boot: Fix kdump, cleanup aborted E820_PRAM max_pfn manipulation In commit: ec776ef6bbe1 ("x86/mm: Add support for the non-standard protected e820 type") Christoph references the original patch I wrote implementing pmem support. The intent of the 'max_pfn' changes in that commit were to enable persistent memory ranges to be covered by the struct page memmap by default. However, that approach was abandoned when Christoph ported the patches [1], and that functionality has since been replaced by devm_memremap_pages(). In the meantime, this max_pfn manipulation is confusing kdump [2] that assumes that everything covered by the max_pfn is "System RAM". This results in kdump hanging or crashing. [1]: https://lists.01.org/pipermail/linux-nvdimm/2015-March/000348.html [2]: https://bugzilla.redhat.com/show_bug.cgi?id=1351098 So fix it. Reported-by: Zhang Yi <yizhan@redhat.com> Reported-by: Jeff Moyer <jmoyer@redhat.com> Tested-by: Zhang Yi <yizhan@redhat.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com> Reviewed-by: Jeff Moyer <jmoyer@redhat.com> Cc: <stable@vger.kernel.org> # v4.1 and later kernels Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Boaz Harrosh <boaz@plexistor.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ross Zwisler <ross.zwisler@linux.intel.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-nvdimm@lists.01.org Fixes: ec776ef6bbe1 ("x86/mm: Add support for the non-standard protected e820 type") Link: http://lkml.kernel.org/r/147448744538.34910.11287693517367139607.stgit@dwillia2-desk3.amr.corp.intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-09-22 03:50:45 +08:00
static unsigned long __init e820_end_pfn(unsigned long limit_pfn, unsigned type)
{
int i;
unsigned long last_pfn = 0;
unsigned long max_arch_pfn = MAX_ARCH_PFN;
for (i = 0; i < e820_table->nr_entries; i++) {
struct e820_entry *ei = &e820_table->entries[i];
unsigned long start_pfn;
unsigned long end_pfn;
x86/boot: Fix kdump, cleanup aborted E820_PRAM max_pfn manipulation In commit: ec776ef6bbe1 ("x86/mm: Add support for the non-standard protected e820 type") Christoph references the original patch I wrote implementing pmem support. The intent of the 'max_pfn' changes in that commit were to enable persistent memory ranges to be covered by the struct page memmap by default. However, that approach was abandoned when Christoph ported the patches [1], and that functionality has since been replaced by devm_memremap_pages(). In the meantime, this max_pfn manipulation is confusing kdump [2] that assumes that everything covered by the max_pfn is "System RAM". This results in kdump hanging or crashing. [1]: https://lists.01.org/pipermail/linux-nvdimm/2015-March/000348.html [2]: https://bugzilla.redhat.com/show_bug.cgi?id=1351098 So fix it. Reported-by: Zhang Yi <yizhan@redhat.com> Reported-by: Jeff Moyer <jmoyer@redhat.com> Tested-by: Zhang Yi <yizhan@redhat.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com> Reviewed-by: Jeff Moyer <jmoyer@redhat.com> Cc: <stable@vger.kernel.org> # v4.1 and later kernels Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Boaz Harrosh <boaz@plexistor.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ross Zwisler <ross.zwisler@linux.intel.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-nvdimm@lists.01.org Fixes: ec776ef6bbe1 ("x86/mm: Add support for the non-standard protected e820 type") Link: http://lkml.kernel.org/r/147448744538.34910.11287693517367139607.stgit@dwillia2-desk3.amr.corp.intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-09-22 03:50:45 +08:00
if (ei->type != type)
continue;
start_pfn = ei->addr >> PAGE_SHIFT;
end_pfn = (ei->addr + ei->size) >> PAGE_SHIFT;
if (start_pfn >= limit_pfn)
continue;
if (end_pfn > limit_pfn) {
last_pfn = limit_pfn;
break;
}
if (end_pfn > last_pfn)
last_pfn = end_pfn;
}
if (last_pfn > max_arch_pfn)
last_pfn = max_arch_pfn;
printk(KERN_INFO "e820: last_pfn = %#lx max_arch_pfn = %#lx\n",
last_pfn, max_arch_pfn);
return last_pfn;
}
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
unsigned long __init e820_end_of_ram_pfn(void)
{
x86/boot: Fix kdump, cleanup aborted E820_PRAM max_pfn manipulation In commit: ec776ef6bbe1 ("x86/mm: Add support for the non-standard protected e820 type") Christoph references the original patch I wrote implementing pmem support. The intent of the 'max_pfn' changes in that commit were to enable persistent memory ranges to be covered by the struct page memmap by default. However, that approach was abandoned when Christoph ported the patches [1], and that functionality has since been replaced by devm_memremap_pages(). In the meantime, this max_pfn manipulation is confusing kdump [2] that assumes that everything covered by the max_pfn is "System RAM". This results in kdump hanging or crashing. [1]: https://lists.01.org/pipermail/linux-nvdimm/2015-March/000348.html [2]: https://bugzilla.redhat.com/show_bug.cgi?id=1351098 So fix it. Reported-by: Zhang Yi <yizhan@redhat.com> Reported-by: Jeff Moyer <jmoyer@redhat.com> Tested-by: Zhang Yi <yizhan@redhat.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com> Reviewed-by: Jeff Moyer <jmoyer@redhat.com> Cc: <stable@vger.kernel.org> # v4.1 and later kernels Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Boaz Harrosh <boaz@plexistor.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ross Zwisler <ross.zwisler@linux.intel.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-nvdimm@lists.01.org Fixes: ec776ef6bbe1 ("x86/mm: Add support for the non-standard protected e820 type") Link: http://lkml.kernel.org/r/147448744538.34910.11287693517367139607.stgit@dwillia2-desk3.amr.corp.intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-09-22 03:50:45 +08:00
return e820_end_pfn(MAX_ARCH_PFN, E820_RAM);
}
unsigned long __init e820_end_of_low_ram_pfn(void)
{
x86/boot: Fix kdump, cleanup aborted E820_PRAM max_pfn manipulation In commit: ec776ef6bbe1 ("x86/mm: Add support for the non-standard protected e820 type") Christoph references the original patch I wrote implementing pmem support. The intent of the 'max_pfn' changes in that commit were to enable persistent memory ranges to be covered by the struct page memmap by default. However, that approach was abandoned when Christoph ported the patches [1], and that functionality has since been replaced by devm_memremap_pages(). In the meantime, this max_pfn manipulation is confusing kdump [2] that assumes that everything covered by the max_pfn is "System RAM". This results in kdump hanging or crashing. [1]: https://lists.01.org/pipermail/linux-nvdimm/2015-March/000348.html [2]: https://bugzilla.redhat.com/show_bug.cgi?id=1351098 So fix it. Reported-by: Zhang Yi <yizhan@redhat.com> Reported-by: Jeff Moyer <jmoyer@redhat.com> Tested-by: Zhang Yi <yizhan@redhat.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com> Reviewed-by: Jeff Moyer <jmoyer@redhat.com> Cc: <stable@vger.kernel.org> # v4.1 and later kernels Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Boaz Harrosh <boaz@plexistor.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ross Zwisler <ross.zwisler@linux.intel.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-nvdimm@lists.01.org Fixes: ec776ef6bbe1 ("x86/mm: Add support for the non-standard protected e820 type") Link: http://lkml.kernel.org/r/147448744538.34910.11287693517367139607.stgit@dwillia2-desk3.amr.corp.intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-09-22 03:50:45 +08:00
return e820_end_pfn(1UL << (32 - PAGE_SHIFT), E820_RAM);
}
static void __init early_panic(char *msg)
{
early_printk(msg);
panic(msg);
}
static int userdef __initdata;
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
/* The "mem=nopentium" boot option disables 4MB page tables on 32-bit kernels: */
static int __init parse_memopt(char *p)
{
u64 mem_size;
if (!p)
return -EINVAL;
if (!strcmp(p, "nopentium")) {
#ifdef CONFIG_X86_32
setup_clear_cpu_cap(X86_FEATURE_PSE);
return 0;
#else
printk(KERN_WARNING "mem=nopentium ignored! (only supported on x86_32)\n");
return -EINVAL;
#endif
}
userdef = 1;
mem_size = memparse(p, &p);
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
/* Don't remove all memory when getting "mem={invalid}" parameter: */
if (mem_size == 0)
return -EINVAL;
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
e820_remove_range(mem_size, ULLONG_MAX - mem_size, E820_RAM, 1);
return 0;
}
early_param("mem", parse_memopt);
static int __init parse_memmap_one(char *p)
{
char *oldp;
u64 start_at, mem_size;
if (!p)
return -EINVAL;
x86: fix memmap=exactmap boot argument When using kdump modifying the e820 map is yielding strange results. For example starting with BIOS-provided physical RAM map: BIOS-e820: 0000000000000100 - 0000000000093400 (usable) BIOS-e820: 0000000000093400 - 00000000000a0000 (reserved) BIOS-e820: 0000000000100000 - 000000003fee0000 (usable) BIOS-e820: 000000003fee0000 - 000000003fef3000 (ACPI data) BIOS-e820: 000000003fef3000 - 000000003ff80000 (ACPI NVS) BIOS-e820: 000000003ff80000 - 0000000040000000 (reserved) BIOS-e820: 00000000e0000000 - 00000000f0000000 (reserved) BIOS-e820: 00000000fec00000 - 00000000fec10000 (reserved) BIOS-e820: 00000000fee00000 - 00000000fee01000 (reserved) BIOS-e820: 00000000ff000000 - 0000000100000000 (reserved) and booting with args memmap=exactmap memmap=640K@0K memmap=5228K@16384K memmap=125188K@22252K memmap=76K#1047424K memmap=564K#1047500K resulted in: user-defined physical RAM map: user: 0000000000000000 - 0000000000093400 (usable) user: 0000000000093400 - 00000000000a0000 (reserved) user: 0000000000100000 - 000000003fee0000 (usable) user: 000000003fee0000 - 000000003fef3000 (ACPI data) user: 000000003fef3000 - 000000003ff80000 (ACPI NVS) user: 000000003ff80000 - 0000000040000000 (reserved) user: 00000000e0000000 - 00000000f0000000 (reserved) user: 00000000fec00000 - 00000000fec10000 (reserved) user: 00000000fee00000 - 00000000fee01000 (reserved) user: 00000000ff000000 - 0000000100000000 (reserved) But should have resulted in: user-defined physical RAM map: user: 0000000000000000 - 00000000000a0000 (usable) user: 0000000001000000 - 000000000151b000 (usable) user: 00000000015bb000 - 0000000008ffc000 (usable) user: 000000003fee0000 - 000000003ff80000 (ACPI data) This is happening because of an improper usage of strcmp() in the e820 parsing code. The strcmp() always returns !0 and never resets the value for e820.nr_map and returns an incorrect user-defined map. This patch fixes the problem. Signed-off-by: Prarit Bhargava <prarit@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-09-09 21:56:08 +08:00
if (!strncmp(p, "exactmap", 8)) {
#ifdef CONFIG_CRASH_DUMP
/*
* If we are doing a crash dump, we still need to know
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
* the real memory size before the original memory map is
* reset.
*/
saved_max_pfn = e820_end_of_ram_pfn();
#endif
e820_table->nr_entries = 0;
userdef = 1;
return 0;
}
oldp = p;
mem_size = memparse(p, &p);
if (p == oldp)
return -EINVAL;
userdef = 1;
if (*p == '@') {
start_at = memparse(p+1, &p);
e820_add_region(start_at, mem_size, E820_RAM);
} else if (*p == '#') {
start_at = memparse(p+1, &p);
e820_add_region(start_at, mem_size, E820_ACPI);
} else if (*p == '$') {
start_at = memparse(p+1, &p);
e820_add_region(start_at, mem_size, E820_RESERVED);
} else if (*p == '!') {
start_at = memparse(p+1, &p);
e820_add_region(start_at, mem_size, E820_PRAM);
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
} else {
e820_remove_range(mem_size, ULLONG_MAX - mem_size, E820_RAM, 1);
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
}
return *p == '\0' ? 0 : -EINVAL;
}
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
static int __init parse_memmap_opt(char *str)
{
while (str) {
char *k = strchr(str, ',');
if (k)
*k++ = 0;
parse_memmap_one(str);
str = k;
}
return 0;
}
early_param("memmap", parse_memmap_opt);
void __init finish_e820_parsing(void)
{
if (userdef) {
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
if (sanitize_e820_table(e820_table->entries, ARRAY_SIZE(e820_table->entries), &e820_table->nr_entries) < 0)
early_panic("Invalid user supplied memory map");
printk(KERN_INFO "e820: user-defined physical RAM map:\n");
e820_print_map("user");
}
}
static const char *__init e820_type_to_string(int e820_type)
{
switch (e820_type) {
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
case E820_RESERVED_KERN: /* Fall-through: */
case E820_RAM: return "System RAM";
case E820_ACPI: return "ACPI Tables";
case E820_NVS: return "ACPI Non-volatile Storage";
case E820_UNUSABLE: return "Unusable memory";
case E820_PRAM: return "Persistent Memory (legacy)";
case E820_PMEM: return "Persistent Memory";
default: return "Reserved";
}
}
static unsigned long __init e820_type_to_iomem_type(int e820_type)
x86/e820: Set System RAM type and descriptor Change e820_reserve_resources() to set 'flags' and 'desc' from e820 types. Set E820_RESERVED_KERN and E820_RAM's (System RAM) io resource type to IORESOURCE_SYSTEM_RAM. Do the same for "Kernel data", "Kernel code", and "Kernel bss", which are child nodes of System RAM. I/O resource descriptor is set to 'desc' for entries that are (and will be) target ranges of walk_iomem_res() and region_intersects(). Signed-off-by: Toshi Kani <toshi.kani@hpe.com> Signed-off-by: Borislav Petkov <bp@suse.de> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Baoquan He <bhe@redhat.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Dave Young <dyoung@redhat.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Jiri Kosina <jkosina@suse.cz> Cc: Joerg Roedel <jroedel@suse.de> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Luis R. Rodriguez <mcgrof@suse.com> Cc: Mark Salter <msalter@redhat.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Tony Luck <tony.luck@intel.com> Cc: Toshi Kani <toshi.kani@hp.com> Cc: WANG Chao <chaowang@redhat.com> Cc: linux-arch@vger.kernel.org Cc: linux-mm <linux-mm@kvack.org> Link: http://lkml.kernel.org/r/1453841853-11383-5-git-send-email-bp@alien8.de Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-01-27 04:57:20 +08:00
{
switch (e820_type) {
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
case E820_RESERVED_KERN: /* Fall-through: */
case E820_RAM: return IORESOURCE_SYSTEM_RAM;
case E820_ACPI: /* Fall-through: */
case E820_NVS: /* Fall-through: */
case E820_UNUSABLE: /* Fall-through: */
case E820_PRAM: /* Fall-through: */
case E820_PMEM: /* Fall-through: */
default: return IORESOURCE_MEM;
x86/e820: Set System RAM type and descriptor Change e820_reserve_resources() to set 'flags' and 'desc' from e820 types. Set E820_RESERVED_KERN and E820_RAM's (System RAM) io resource type to IORESOURCE_SYSTEM_RAM. Do the same for "Kernel data", "Kernel code", and "Kernel bss", which are child nodes of System RAM. I/O resource descriptor is set to 'desc' for entries that are (and will be) target ranges of walk_iomem_res() and region_intersects(). Signed-off-by: Toshi Kani <toshi.kani@hpe.com> Signed-off-by: Borislav Petkov <bp@suse.de> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Baoquan He <bhe@redhat.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Dave Young <dyoung@redhat.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Jiri Kosina <jkosina@suse.cz> Cc: Joerg Roedel <jroedel@suse.de> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Luis R. Rodriguez <mcgrof@suse.com> Cc: Mark Salter <msalter@redhat.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Tony Luck <tony.luck@intel.com> Cc: Toshi Kani <toshi.kani@hp.com> Cc: WANG Chao <chaowang@redhat.com> Cc: linux-arch@vger.kernel.org Cc: linux-mm <linux-mm@kvack.org> Link: http://lkml.kernel.org/r/1453841853-11383-5-git-send-email-bp@alien8.de Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-01-27 04:57:20 +08:00
}
}
static unsigned long __init e820_type_to_iores_desc(int e820_type)
x86/e820: Set System RAM type and descriptor Change e820_reserve_resources() to set 'flags' and 'desc' from e820 types. Set E820_RESERVED_KERN and E820_RAM's (System RAM) io resource type to IORESOURCE_SYSTEM_RAM. Do the same for "Kernel data", "Kernel code", and "Kernel bss", which are child nodes of System RAM. I/O resource descriptor is set to 'desc' for entries that are (and will be) target ranges of walk_iomem_res() and region_intersects(). Signed-off-by: Toshi Kani <toshi.kani@hpe.com> Signed-off-by: Borislav Petkov <bp@suse.de> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Baoquan He <bhe@redhat.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Dave Young <dyoung@redhat.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Jiri Kosina <jkosina@suse.cz> Cc: Joerg Roedel <jroedel@suse.de> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Luis R. Rodriguez <mcgrof@suse.com> Cc: Mark Salter <msalter@redhat.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Tony Luck <tony.luck@intel.com> Cc: Toshi Kani <toshi.kani@hp.com> Cc: WANG Chao <chaowang@redhat.com> Cc: linux-arch@vger.kernel.org Cc: linux-mm <linux-mm@kvack.org> Link: http://lkml.kernel.org/r/1453841853-11383-5-git-send-email-bp@alien8.de Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-01-27 04:57:20 +08:00
{
switch (e820_type) {
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
case E820_ACPI: return IORES_DESC_ACPI_TABLES;
case E820_NVS: return IORES_DESC_ACPI_NV_STORAGE;
case E820_PMEM: return IORES_DESC_PERSISTENT_MEMORY;
case E820_PRAM: return IORES_DESC_PERSISTENT_MEMORY_LEGACY;
case E820_RESERVED_KERN: /* Fall-through: */
case E820_RAM: /* Fall-through: */
case E820_UNUSABLE: /* Fall-through: */
default: return IORES_DESC_NONE;
x86/e820: Set System RAM type and descriptor Change e820_reserve_resources() to set 'flags' and 'desc' from e820 types. Set E820_RESERVED_KERN and E820_RAM's (System RAM) io resource type to IORESOURCE_SYSTEM_RAM. Do the same for "Kernel data", "Kernel code", and "Kernel bss", which are child nodes of System RAM. I/O resource descriptor is set to 'desc' for entries that are (and will be) target ranges of walk_iomem_res() and region_intersects(). Signed-off-by: Toshi Kani <toshi.kani@hpe.com> Signed-off-by: Borislav Petkov <bp@suse.de> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Baoquan He <bhe@redhat.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Dave Young <dyoung@redhat.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Jiri Kosina <jkosina@suse.cz> Cc: Joerg Roedel <jroedel@suse.de> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Luis R. Rodriguez <mcgrof@suse.com> Cc: Mark Salter <msalter@redhat.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Tony Luck <tony.luck@intel.com> Cc: Toshi Kani <toshi.kani@hp.com> Cc: WANG Chao <chaowang@redhat.com> Cc: linux-arch@vger.kernel.org Cc: linux-mm <linux-mm@kvack.org> Link: http://lkml.kernel.org/r/1453841853-11383-5-git-send-email-bp@alien8.de Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-01-27 04:57:20 +08:00
}
}
static bool __init do_mark_busy(u32 type, struct resource *res)
{
/* this is the legacy bios/dos rom-shadow + mmio region */
if (res->start < (1ULL<<20))
return true;
/*
* Treat persistent memory like device memory, i.e. reserve it
* for exclusive use of a driver
*/
switch (type) {
case E820_RESERVED:
case E820_PRAM:
case E820_PMEM:
return false;
default:
return true;
}
}
/*
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
* Mark E820 reserved areas as busy for the resource manager:
*/
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
static struct resource __initdata *e820_res;
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
void __init e820_reserve_resources(void)
{
int i;
struct resource *res;
u64 end;
res = alloc_bootmem(sizeof(struct resource) * e820_table->nr_entries);
e820_res = res;
for (i = 0; i < e820_table->nr_entries; i++) {
end = e820_table->entries[i].addr + e820_table->entries[i].size - 1;
if (end != (resource_size_t)end) {
res++;
continue;
}
res->name = e820_type_to_string(e820_table->entries[i].type);
res->start = e820_table->entries[i].addr;
res->end = end;
res->flags = e820_type_to_iomem_type(e820_table->entries[i].type);
res->desc = e820_type_to_iores_desc(e820_table->entries[i].type);
/*
* don't register the region that could be conflicted with
* pci device BAR resource and insert them later in
* pcibios_resource_survey()
*/
if (do_mark_busy(e820_table->entries[i].type, res)) {
x86: Clean up late e820 resource allocation This makes the late e820 resources use 'insert_resource_expand_to_fit()' instead of doing a 'reserve_region_with_split()', and also avoids marking them as IORESOURCE_BUSY. This results in us being perfectly happy to use pre-existing PCI resources even if they were marked as being in a reserved region, while still avoiding any _new_ allocations in the reserved regions. It also makes for a simpler and more accurate resource tree. Example resource allocation from Jonathan Corbet, who has firmware that has an e820 reserved entry that covered a big range (e0000000-fed003ff), and that had various PCI resources in it set up by firmware. With old kernels, the reserved range would force us to re-allocate all pre-existing PCI resources, and his reserved range would end up looking like this: e0000000-fed003ff : reserved fec00000-fec00fff : IOAPIC 0 fed00000-fed003ff : HPET 0 where only the pre-allocated special regions (IOAPIC and HPET) were kept around. With 2.6.28-rc2, which uses 'reserve_region_with_split()', Jonathan's resource tree looked like this: e0000000-fe7fffff : reserved fe800000-fe8fffff : PCI Bus 0000:01 fe800000-fe8fffff : reserved fe900000-fe9d9aff : reserved fe9d9b00-fe9d9bff : 0000:00:1f.3 fe9d9b00-fe9d9bff : reserved fe9d9c00-fe9d9fff : 0000:00:1a.7 fe9d9c00-fe9d9fff : reserved fe9da000-fe9dafff : 0000:00:03.3 fe9da000-fe9dafff : reserved fe9db000-fe9dbfff : 0000:00:19.0 fe9db000-fe9dbfff : reserved fe9dc000-fe9dffff : 0000:00:1b.0 fe9dc000-fe9dffff : reserved fe9e0000-fe9fffff : 0000:00:19.0 fe9e0000-fe9fffff : reserved fea00000-fea7ffff : 0000:00:02.0 fea00000-fea7ffff : reserved fea80000-feafffff : 0000:00:02.1 fea80000-feafffff : reserved feb00000-febfffff : 0000:00:02.0 feb00000-febfffff : reserved fec00000-fed003ff : reserved fec00000-fec00fff : IOAPIC 0 fed00000-fed003ff : HPET 0 and because the reserved entry had been split and moved into the individual resources, and because it used the IORESOURCE_BUSY flag, the drivers that actually wanted to _use_ those resources couldn't actually attach to them: e1000e 0000:00:19.0: BAR 0: can't reserve mem region [0xfe9e0000-0xfe9fffff] HDA Intel 0000:00:1b.0: BAR 0: can't reserve mem region [0xfe9dc000-0xfe9dffff] with this patch, the resource tree instead becomes e0000000-fed003ff : reserved fe800000-fe8fffff : PCI Bus 0000:01 fe9d9b00-fe9d9bff : 0000:00:1f.3 fe9d9c00-fe9d9fff : 0000:00:1a.7 fe9d9c00-fe9d9fff : ehci_hcd fe9da000-fe9dafff : 0000:00:03.3 fe9db000-fe9dbfff : 0000:00:19.0 fe9db000-fe9dbfff : e1000e fe9dc000-fe9dffff : 0000:00:1b.0 fe9dc000-fe9dffff : ICH HD audio fe9e0000-fe9fffff : 0000:00:19.0 fe9e0000-fe9fffff : e1000e fea00000-fea7ffff : 0000:00:02.0 fea80000-feafffff : 0000:00:02.1 feb00000-febfffff : 0000:00:02.0 fec00000-fec00fff : IOAPIC 0 fed00000-fed003ff : HPET 0 ie the one reserved region now ends up surrounding all the PCI resources that were allocated inside of it by firmware, and because it is not marked BUSY, drivers have no problem attaching to the pre-allocated resources. Reported-and-tested-by: Jonathan Corbet <corbet@lwn.net> Cc: Yinghai Lu <yinghai@kernel.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: Robert Hancock <hancockr@shaw.ca> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-11-02 01:17:22 +08:00
res->flags |= IORESOURCE_BUSY;
insert_resource(&iomem_resource, res);
x86: Clean up late e820 resource allocation This makes the late e820 resources use 'insert_resource_expand_to_fit()' instead of doing a 'reserve_region_with_split()', and also avoids marking them as IORESOURCE_BUSY. This results in us being perfectly happy to use pre-existing PCI resources even if they were marked as being in a reserved region, while still avoiding any _new_ allocations in the reserved regions. It also makes for a simpler and more accurate resource tree. Example resource allocation from Jonathan Corbet, who has firmware that has an e820 reserved entry that covered a big range (e0000000-fed003ff), and that had various PCI resources in it set up by firmware. With old kernels, the reserved range would force us to re-allocate all pre-existing PCI resources, and his reserved range would end up looking like this: e0000000-fed003ff : reserved fec00000-fec00fff : IOAPIC 0 fed00000-fed003ff : HPET 0 where only the pre-allocated special regions (IOAPIC and HPET) were kept around. With 2.6.28-rc2, which uses 'reserve_region_with_split()', Jonathan's resource tree looked like this: e0000000-fe7fffff : reserved fe800000-fe8fffff : PCI Bus 0000:01 fe800000-fe8fffff : reserved fe900000-fe9d9aff : reserved fe9d9b00-fe9d9bff : 0000:00:1f.3 fe9d9b00-fe9d9bff : reserved fe9d9c00-fe9d9fff : 0000:00:1a.7 fe9d9c00-fe9d9fff : reserved fe9da000-fe9dafff : 0000:00:03.3 fe9da000-fe9dafff : reserved fe9db000-fe9dbfff : 0000:00:19.0 fe9db000-fe9dbfff : reserved fe9dc000-fe9dffff : 0000:00:1b.0 fe9dc000-fe9dffff : reserved fe9e0000-fe9fffff : 0000:00:19.0 fe9e0000-fe9fffff : reserved fea00000-fea7ffff : 0000:00:02.0 fea00000-fea7ffff : reserved fea80000-feafffff : 0000:00:02.1 fea80000-feafffff : reserved feb00000-febfffff : 0000:00:02.0 feb00000-febfffff : reserved fec00000-fed003ff : reserved fec00000-fec00fff : IOAPIC 0 fed00000-fed003ff : HPET 0 and because the reserved entry had been split and moved into the individual resources, and because it used the IORESOURCE_BUSY flag, the drivers that actually wanted to _use_ those resources couldn't actually attach to them: e1000e 0000:00:19.0: BAR 0: can't reserve mem region [0xfe9e0000-0xfe9fffff] HDA Intel 0000:00:1b.0: BAR 0: can't reserve mem region [0xfe9dc000-0xfe9dffff] with this patch, the resource tree instead becomes e0000000-fed003ff : reserved fe800000-fe8fffff : PCI Bus 0000:01 fe9d9b00-fe9d9bff : 0000:00:1f.3 fe9d9c00-fe9d9fff : 0000:00:1a.7 fe9d9c00-fe9d9fff : ehci_hcd fe9da000-fe9dafff : 0000:00:03.3 fe9db000-fe9dbfff : 0000:00:19.0 fe9db000-fe9dbfff : e1000e fe9dc000-fe9dffff : 0000:00:1b.0 fe9dc000-fe9dffff : ICH HD audio fe9e0000-fe9fffff : 0000:00:19.0 fe9e0000-fe9fffff : e1000e fea00000-fea7ffff : 0000:00:02.0 fea80000-feafffff : 0000:00:02.1 feb00000-febfffff : 0000:00:02.0 fec00000-fec00fff : IOAPIC 0 fed00000-fed003ff : HPET 0 ie the one reserved region now ends up surrounding all the PCI resources that were allocated inside of it by firmware, and because it is not marked BUSY, drivers have no problem attaching to the pre-allocated resources. Reported-and-tested-by: Jonathan Corbet <corbet@lwn.net> Cc: Yinghai Lu <yinghai@kernel.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: Robert Hancock <hancockr@shaw.ca> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-11-02 01:17:22 +08:00
}
res++;
}
x86/boot/e820: Rename e820_table_saved to e820_table_firmware and improve the description So the 'e820_table_saved' is a bit of a misnomer that hides its real purpose. At first sight the name suggests that it's some sort save/restore mechanism, as this is how we typically name such facilities in the kernel. But that is not so, e820_table_saved is the original firmware version of the e820 table, not modified by the kernel. This table is displayed in the /sys/firmware/memmap file, and it's also used by the hibernation code to calculate a physical memory layout MD5 fingerprint checksum which is invariant of the kernel. So rename it to 'e820_table_firmware' and update all the comments to better describe the main e820 data strutures. Also rename: 'initial_e820_table_saved' => 'e820_table_firmware_init' 'e820_update_range_saved' => 'e820_update_range_firmware' ... to better match the new nomenclature. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 17:07:49 +08:00
for (i = 0; i < e820_table_firmware->nr_entries; i++) {
struct e820_entry *entry = &e820_table_firmware->entries[i];
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
firmware_map_add_early(entry->addr, entry->addr + entry->size, e820_type_to_string(entry->type));
}
}
/* How much should we pad RAM ending depending on where it is? */
static unsigned long __init ram_alignment(resource_size_t pos)
{
unsigned long mb = pos >> 20;
/* To 64kB in the first megabyte */
if (!mb)
return 64*1024;
/* To 1MB in the first 16MB */
if (mb < 16)
return 1024*1024;
/* To 64MB for anything above that */
return 64*1024*1024;
}
#define MAX_RESOURCE_SIZE ((resource_size_t)-1)
void __init e820_reserve_resources_late(void)
{
int i;
struct resource *res;
res = e820_res;
for (i = 0; i < e820_table->nr_entries; i++) {
if (!res->parent && res->end)
x86: Clean up late e820 resource allocation This makes the late e820 resources use 'insert_resource_expand_to_fit()' instead of doing a 'reserve_region_with_split()', and also avoids marking them as IORESOURCE_BUSY. This results in us being perfectly happy to use pre-existing PCI resources even if they were marked as being in a reserved region, while still avoiding any _new_ allocations in the reserved regions. It also makes for a simpler and more accurate resource tree. Example resource allocation from Jonathan Corbet, who has firmware that has an e820 reserved entry that covered a big range (e0000000-fed003ff), and that had various PCI resources in it set up by firmware. With old kernels, the reserved range would force us to re-allocate all pre-existing PCI resources, and his reserved range would end up looking like this: e0000000-fed003ff : reserved fec00000-fec00fff : IOAPIC 0 fed00000-fed003ff : HPET 0 where only the pre-allocated special regions (IOAPIC and HPET) were kept around. With 2.6.28-rc2, which uses 'reserve_region_with_split()', Jonathan's resource tree looked like this: e0000000-fe7fffff : reserved fe800000-fe8fffff : PCI Bus 0000:01 fe800000-fe8fffff : reserved fe900000-fe9d9aff : reserved fe9d9b00-fe9d9bff : 0000:00:1f.3 fe9d9b00-fe9d9bff : reserved fe9d9c00-fe9d9fff : 0000:00:1a.7 fe9d9c00-fe9d9fff : reserved fe9da000-fe9dafff : 0000:00:03.3 fe9da000-fe9dafff : reserved fe9db000-fe9dbfff : 0000:00:19.0 fe9db000-fe9dbfff : reserved fe9dc000-fe9dffff : 0000:00:1b.0 fe9dc000-fe9dffff : reserved fe9e0000-fe9fffff : 0000:00:19.0 fe9e0000-fe9fffff : reserved fea00000-fea7ffff : 0000:00:02.0 fea00000-fea7ffff : reserved fea80000-feafffff : 0000:00:02.1 fea80000-feafffff : reserved feb00000-febfffff : 0000:00:02.0 feb00000-febfffff : reserved fec00000-fed003ff : reserved fec00000-fec00fff : IOAPIC 0 fed00000-fed003ff : HPET 0 and because the reserved entry had been split and moved into the individual resources, and because it used the IORESOURCE_BUSY flag, the drivers that actually wanted to _use_ those resources couldn't actually attach to them: e1000e 0000:00:19.0: BAR 0: can't reserve mem region [0xfe9e0000-0xfe9fffff] HDA Intel 0000:00:1b.0: BAR 0: can't reserve mem region [0xfe9dc000-0xfe9dffff] with this patch, the resource tree instead becomes e0000000-fed003ff : reserved fe800000-fe8fffff : PCI Bus 0000:01 fe9d9b00-fe9d9bff : 0000:00:1f.3 fe9d9c00-fe9d9fff : 0000:00:1a.7 fe9d9c00-fe9d9fff : ehci_hcd fe9da000-fe9dafff : 0000:00:03.3 fe9db000-fe9dbfff : 0000:00:19.0 fe9db000-fe9dbfff : e1000e fe9dc000-fe9dffff : 0000:00:1b.0 fe9dc000-fe9dffff : ICH HD audio fe9e0000-fe9fffff : 0000:00:19.0 fe9e0000-fe9fffff : e1000e fea00000-fea7ffff : 0000:00:02.0 fea80000-feafffff : 0000:00:02.1 feb00000-febfffff : 0000:00:02.0 fec00000-fec00fff : IOAPIC 0 fed00000-fed003ff : HPET 0 ie the one reserved region now ends up surrounding all the PCI resources that were allocated inside of it by firmware, and because it is not marked BUSY, drivers have no problem attaching to the pre-allocated resources. Reported-and-tested-by: Jonathan Corbet <corbet@lwn.net> Cc: Yinghai Lu <yinghai@kernel.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: Robert Hancock <hancockr@shaw.ca> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-11-02 01:17:22 +08:00
insert_resource_expand_to_fit(&iomem_resource, res);
res++;
}
/*
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
* Try to bump up RAM regions to reasonable boundaries, to
* avoid stolen RAM:
*/
for (i = 0; i < e820_table->nr_entries; i++) {
struct e820_entry *entry = &e820_table->entries[i];
u64 start, end;
if (entry->type != E820_RAM)
continue;
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
start = entry->addr + entry->size;
end = round_up(start, ram_alignment(start)) - 1;
if (end > MAX_RESOURCE_SIZE)
end = MAX_RESOURCE_SIZE;
if (start >= end)
continue;
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
printk(KERN_DEBUG "e820: reserve RAM buffer [mem %#010llx-%#010llx]\n", start, end);
reserve_region_with_split(&iomem_resource, start, end, "RAM buffer");
}
}
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
/*
* Pass the firmware (bootloader) E820 map to the kernel and process it:
*/
char *__init e820__memory_setup_default(void)
{
char *who = "BIOS-e820";
u32 new_nr;
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
/*
* Try to copy the BIOS-supplied E820-map.
*
* Otherwise fake a memory map; one section from 0k->640k,
* the next section from 1mb->appropriate_mem_k
*/
new_nr = boot_params.e820_entries;
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
sanitize_e820_table(boot_params.e820_table, ARRAY_SIZE(boot_params.e820_table), &new_nr);
boot_params.e820_entries = new_nr;
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) {
u64 mem_size;
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
/* Compare results from other methods and take the one that gives more RAM: */
if (boot_params.alt_mem_k < boot_params.screen_info.ext_mem_k) {
mem_size = boot_params.screen_info.ext_mem_k;
who = "BIOS-88";
} else {
mem_size = boot_params.alt_mem_k;
who = "BIOS-e801";
}
e820_table->nr_entries = 0;
e820_add_region(0, LOWMEMSIZE(), E820_RAM);
e820_add_region(HIGH_MEMORY, mem_size << 10, E820_RAM);
}
return who;
}
/*
* Calls e820__memory_setup_default() in essence to pick up the firmware/bootloader
* E820 map - with an optional platform quirk available for virtual platforms
* to override this method of boot environment processing:
*/
void __init e820__memory_setup(void)
{
char *who;
who = x86_init.resources.memory_setup();
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
x86/boot/e820: Rename e820_table_saved to e820_table_firmware and improve the description So the 'e820_table_saved' is a bit of a misnomer that hides its real purpose. At first sight the name suggests that it's some sort save/restore mechanism, as this is how we typically name such facilities in the kernel. But that is not so, e820_table_saved is the original firmware version of the e820 table, not modified by the kernel. This table is displayed in the /sys/firmware/memmap file, and it's also used by the hibernation code to calculate a physical memory layout MD5 fingerprint checksum which is invariant of the kernel. So rename it to 'e820_table_firmware' and update all the comments to better describe the main e820 data strutures. Also rename: 'initial_e820_table_saved' => 'e820_table_firmware_init' 'e820_update_range_saved' => 'e820_update_range_firmware' ... to better match the new nomenclature. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 17:07:49 +08:00
memcpy(e820_table_firmware, e820_table, sizeof(struct e820_table));
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
printk(KERN_INFO "e820: BIOS-provided physical RAM map:\n");
e820_print_map(who);
}
x86: Use memblock to replace early_res 1. replace find_e820_area with memblock_find_in_range 2. replace reserve_early with memblock_x86_reserve_range 3. replace free_early with memblock_x86_free_range. 4. NO_BOOTMEM will switch to use memblock too. 5. use _e820, _early wrap in the patch, in following patch, will replace them all 6. because memblock_x86_free_range support partial free, we can remove some special care 7. Need to make sure that memblock_find_in_range() is called after memblock_x86_fill() so adjust some calling later in setup.c::setup_arch() -- corruption_check and mptable_update -v2: Move reserve_brk() early Before fill_memblock_area, to avoid overlap between brk and memblock_find_in_range() that could happen We have more then 128 RAM entry in E820 tables, and memblock_x86_fill() could use memblock_find_in_range() to find a new place for memblock.memory.region array. and We don't need to use extend_brk() after fill_memblock_area() So move reserve_brk() early before fill_memblock_area(). -v3: Move find_smp_config early To make sure memblock_find_in_range not find wrong place, if BIOS doesn't put mptable in right place. -v4: Treat RESERVED_KERN as RAM in memblock.memory. and they are already in memblock.reserved already.. use __NOT_KEEP_MEMBLOCK to make sure memblock related code could be freed later. -v5: Generic version __memblock_find_in_range() is going from high to low, and for 32bit active_region for 32bit does include high pages need to replace the limit with memblock.default_alloc_limit, aka get_max_mapped() -v6: Use current_limit instead -v7: check with MEMBLOCK_ERROR instead of -1ULL or -1L -v8: Set memblock_can_resize early to handle EFI with more RAM entries -v9: update after kmemleak changes in mainline Suggested-by: David S. Miller <davem@davemloft.net> Suggested-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Suggested-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2010-08-26 04:39:17 +08:00
x86/boot/e820: Rename memblock_x86_fill() to e820__memblock_setup() and improve the explanations So memblock_x86_fill() is another E820 code misnomer: - nothing in its name tells us that it's part of the E820 subsystem ... - The 'fill' wording is ambiguous and doesn't tell us whether it's a single entry or some process - while the _real_ purpose of the function is hidden, which is to do a complete setup of the (platform independent) memblock regions. So rename it accordingly, to e820__memblock_setup(). Also translate this incomprehensible and misleading comment: /* * EFI may have more than 128 entries * We are safe to enable resizing, beause memblock_x86_fill() * is rather later for x86 */ memblock_allow_resize(); The worst aspect of this comment isn't even the sloppy typos, but that it casually mentions a '128' number with no explanation, which makes one lead to the assumption that this is related to the well-known limit of a maximum of 128 E820 entries passed via legacy bootloaders. But no, the _real_ meaning of 128 here is that of the memblock subsystem, which too happens to have a 128 entries limit for very early memblock regions (which is unrelated to E820), via INIT_MEMBLOCK_REGIONS ... So change the comment to a more comprehensible version: /* * The bootstrap memblock region count maximum is 128 entries * (INIT_MEMBLOCK_REGIONS), but EFI might pass us more E820 entries * than that - so allow memblock resizing. * * This is safe, because this call happens pretty late during x86 setup, * so we know about reserved memory regions already. (This is important * so that memblock resizing does no stomp over reserved areas.) */ memblock_allow_resize(); No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:37:42 +08:00
void __init e820__memblock_setup(void)
x86: Use memblock to replace early_res 1. replace find_e820_area with memblock_find_in_range 2. replace reserve_early with memblock_x86_reserve_range 3. replace free_early with memblock_x86_free_range. 4. NO_BOOTMEM will switch to use memblock too. 5. use _e820, _early wrap in the patch, in following patch, will replace them all 6. because memblock_x86_free_range support partial free, we can remove some special care 7. Need to make sure that memblock_find_in_range() is called after memblock_x86_fill() so adjust some calling later in setup.c::setup_arch() -- corruption_check and mptable_update -v2: Move reserve_brk() early Before fill_memblock_area, to avoid overlap between brk and memblock_find_in_range() that could happen We have more then 128 RAM entry in E820 tables, and memblock_x86_fill() could use memblock_find_in_range() to find a new place for memblock.memory.region array. and We don't need to use extend_brk() after fill_memblock_area() So move reserve_brk() early before fill_memblock_area(). -v3: Move find_smp_config early To make sure memblock_find_in_range not find wrong place, if BIOS doesn't put mptable in right place. -v4: Treat RESERVED_KERN as RAM in memblock.memory. and they are already in memblock.reserved already.. use __NOT_KEEP_MEMBLOCK to make sure memblock related code could be freed later. -v5: Generic version __memblock_find_in_range() is going from high to low, and for 32bit active_region for 32bit does include high pages need to replace the limit with memblock.default_alloc_limit, aka get_max_mapped() -v6: Use current_limit instead -v7: check with MEMBLOCK_ERROR instead of -1ULL or -1L -v8: Set memblock_can_resize early to handle EFI with more RAM entries -v9: update after kmemleak changes in mainline Suggested-by: David S. Miller <davem@davemloft.net> Suggested-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Suggested-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2010-08-26 04:39:17 +08:00
{
int i;
u64 end;
/*
x86/boot/e820: Rename memblock_x86_fill() to e820__memblock_setup() and improve the explanations So memblock_x86_fill() is another E820 code misnomer: - nothing in its name tells us that it's part of the E820 subsystem ... - The 'fill' wording is ambiguous and doesn't tell us whether it's a single entry or some process - while the _real_ purpose of the function is hidden, which is to do a complete setup of the (platform independent) memblock regions. So rename it accordingly, to e820__memblock_setup(). Also translate this incomprehensible and misleading comment: /* * EFI may have more than 128 entries * We are safe to enable resizing, beause memblock_x86_fill() * is rather later for x86 */ memblock_allow_resize(); The worst aspect of this comment isn't even the sloppy typos, but that it casually mentions a '128' number with no explanation, which makes one lead to the assumption that this is related to the well-known limit of a maximum of 128 E820 entries passed via legacy bootloaders. But no, the _real_ meaning of 128 here is that of the memblock subsystem, which too happens to have a 128 entries limit for very early memblock regions (which is unrelated to E820), via INIT_MEMBLOCK_REGIONS ... So change the comment to a more comprehensible version: /* * The bootstrap memblock region count maximum is 128 entries * (INIT_MEMBLOCK_REGIONS), but EFI might pass us more E820 entries * than that - so allow memblock resizing. * * This is safe, because this call happens pretty late during x86 setup, * so we know about reserved memory regions already. (This is important * so that memblock resizing does no stomp over reserved areas.) */ memblock_allow_resize(); No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:37:42 +08:00
* The bootstrap memblock region count maximum is 128 entries
* (INIT_MEMBLOCK_REGIONS), but EFI might pass us more E820 entries
* than that - so allow memblock resizing.
*
* This is safe, because this call happens pretty late during x86 setup,
* so we know about reserved memory regions already. (This is important
* so that memblock resizing does no stomp over reserved areas.)
x86: Use memblock to replace early_res 1. replace find_e820_area with memblock_find_in_range 2. replace reserve_early with memblock_x86_reserve_range 3. replace free_early with memblock_x86_free_range. 4. NO_BOOTMEM will switch to use memblock too. 5. use _e820, _early wrap in the patch, in following patch, will replace them all 6. because memblock_x86_free_range support partial free, we can remove some special care 7. Need to make sure that memblock_find_in_range() is called after memblock_x86_fill() so adjust some calling later in setup.c::setup_arch() -- corruption_check and mptable_update -v2: Move reserve_brk() early Before fill_memblock_area, to avoid overlap between brk and memblock_find_in_range() that could happen We have more then 128 RAM entry in E820 tables, and memblock_x86_fill() could use memblock_find_in_range() to find a new place for memblock.memory.region array. and We don't need to use extend_brk() after fill_memblock_area() So move reserve_brk() early before fill_memblock_area(). -v3: Move find_smp_config early To make sure memblock_find_in_range not find wrong place, if BIOS doesn't put mptable in right place. -v4: Treat RESERVED_KERN as RAM in memblock.memory. and they are already in memblock.reserved already.. use __NOT_KEEP_MEMBLOCK to make sure memblock related code could be freed later. -v5: Generic version __memblock_find_in_range() is going from high to low, and for 32bit active_region for 32bit does include high pages need to replace the limit with memblock.default_alloc_limit, aka get_max_mapped() -v6: Use current_limit instead -v7: check with MEMBLOCK_ERROR instead of -1ULL or -1L -v8: Set memblock_can_resize early to handle EFI with more RAM entries -v9: update after kmemleak changes in mainline Suggested-by: David S. Miller <davem@davemloft.net> Suggested-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Suggested-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2010-08-26 04:39:17 +08:00
*/
memblock: s/memblock_analyze()/memblock_allow_resize()/ and update users The only function of memblock_analyze() is now allowing resize of memblock region arrays. Rename it to memblock_allow_resize() and update its users. * The following users remain the same other than renaming. arm/mm/init.c::arm_memblock_init() microblaze/kernel/prom.c::early_init_devtree() powerpc/kernel/prom.c::early_init_devtree() openrisc/kernel/prom.c::early_init_devtree() sh/mm/init.c::paging_init() sparc/mm/init_64.c::paging_init() unicore32/mm/init.c::uc32_memblock_init() * In the following users, analyze was used to update total size which is no longer necessary. powerpc/kernel/machine_kexec.c::reserve_crashkernel() powerpc/kernel/prom.c::early_init_devtree() powerpc/mm/init_32.c::MMU_init() powerpc/mm/tlb_nohash.c::__early_init_mmu() powerpc/platforms/ps3/mm.c::ps3_mm_add_memory() powerpc/platforms/embedded6xx/wii.c::wii_memory_fixups() sh/kernel/machine_kexec.c::reserve_crashkernel() * x86/kernel/e820.c::memblock_x86_fill() was directly setting memblock_can_resize before populating memblock and calling analyze afterwards. Call memblock_allow_resize() before start populating. memblock_can_resize is now static inside memblock.c. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Yinghai Lu <yinghai@kernel.org> Cc: Russell King <linux@arm.linux.org.uk> Cc: Michal Simek <monstr@monstr.eu> Cc: Paul Mundt <lethal@linux-sh.org> Cc: "David S. Miller" <davem@davemloft.net> Cc: Guan Xuetao <gxt@mprc.pku.edu.cn> Cc: "H. Peter Anvin" <hpa@zytor.com>
2011-12-09 02:22:08 +08:00
memblock_allow_resize();
x86: Use memblock to replace early_res 1. replace find_e820_area with memblock_find_in_range 2. replace reserve_early with memblock_x86_reserve_range 3. replace free_early with memblock_x86_free_range. 4. NO_BOOTMEM will switch to use memblock too. 5. use _e820, _early wrap in the patch, in following patch, will replace them all 6. because memblock_x86_free_range support partial free, we can remove some special care 7. Need to make sure that memblock_find_in_range() is called after memblock_x86_fill() so adjust some calling later in setup.c::setup_arch() -- corruption_check and mptable_update -v2: Move reserve_brk() early Before fill_memblock_area, to avoid overlap between brk and memblock_find_in_range() that could happen We have more then 128 RAM entry in E820 tables, and memblock_x86_fill() could use memblock_find_in_range() to find a new place for memblock.memory.region array. and We don't need to use extend_brk() after fill_memblock_area() So move reserve_brk() early before fill_memblock_area(). -v3: Move find_smp_config early To make sure memblock_find_in_range not find wrong place, if BIOS doesn't put mptable in right place. -v4: Treat RESERVED_KERN as RAM in memblock.memory. and they are already in memblock.reserved already.. use __NOT_KEEP_MEMBLOCK to make sure memblock related code could be freed later. -v5: Generic version __memblock_find_in_range() is going from high to low, and for 32bit active_region for 32bit does include high pages need to replace the limit with memblock.default_alloc_limit, aka get_max_mapped() -v6: Use current_limit instead -v7: check with MEMBLOCK_ERROR instead of -1ULL or -1L -v8: Set memblock_can_resize early to handle EFI with more RAM entries -v9: update after kmemleak changes in mainline Suggested-by: David S. Miller <davem@davemloft.net> Suggested-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Suggested-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2010-08-26 04:39:17 +08:00
for (i = 0; i < e820_table->nr_entries; i++) {
struct e820_entry *ei = &e820_table->entries[i];
x86: Use memblock to replace early_res 1. replace find_e820_area with memblock_find_in_range 2. replace reserve_early with memblock_x86_reserve_range 3. replace free_early with memblock_x86_free_range. 4. NO_BOOTMEM will switch to use memblock too. 5. use _e820, _early wrap in the patch, in following patch, will replace them all 6. because memblock_x86_free_range support partial free, we can remove some special care 7. Need to make sure that memblock_find_in_range() is called after memblock_x86_fill() so adjust some calling later in setup.c::setup_arch() -- corruption_check and mptable_update -v2: Move reserve_brk() early Before fill_memblock_area, to avoid overlap between brk and memblock_find_in_range() that could happen We have more then 128 RAM entry in E820 tables, and memblock_x86_fill() could use memblock_find_in_range() to find a new place for memblock.memory.region array. and We don't need to use extend_brk() after fill_memblock_area() So move reserve_brk() early before fill_memblock_area(). -v3: Move find_smp_config early To make sure memblock_find_in_range not find wrong place, if BIOS doesn't put mptable in right place. -v4: Treat RESERVED_KERN as RAM in memblock.memory. and they are already in memblock.reserved already.. use __NOT_KEEP_MEMBLOCK to make sure memblock related code could be freed later. -v5: Generic version __memblock_find_in_range() is going from high to low, and for 32bit active_region for 32bit does include high pages need to replace the limit with memblock.default_alloc_limit, aka get_max_mapped() -v6: Use current_limit instead -v7: check with MEMBLOCK_ERROR instead of -1ULL or -1L -v8: Set memblock_can_resize early to handle EFI with more RAM entries -v9: update after kmemleak changes in mainline Suggested-by: David S. Miller <davem@davemloft.net> Suggested-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Suggested-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2010-08-26 04:39:17 +08:00
end = ei->addr + ei->size;
if (end != (resource_size_t)end)
continue;
if (ei->type != E820_RAM && ei->type != E820_RESERVED_KERN)
continue;
memblock_add(ei->addr, ei->size);
}
x86/boot/e820: Rename memblock_x86_fill() to e820__memblock_setup() and improve the explanations So memblock_x86_fill() is another E820 code misnomer: - nothing in its name tells us that it's part of the E820 subsystem ... - The 'fill' wording is ambiguous and doesn't tell us whether it's a single entry or some process - while the _real_ purpose of the function is hidden, which is to do a complete setup of the (platform independent) memblock regions. So rename it accordingly, to e820__memblock_setup(). Also translate this incomprehensible and misleading comment: /* * EFI may have more than 128 entries * We are safe to enable resizing, beause memblock_x86_fill() * is rather later for x86 */ memblock_allow_resize(); The worst aspect of this comment isn't even the sloppy typos, but that it casually mentions a '128' number with no explanation, which makes one lead to the assumption that this is related to the well-known limit of a maximum of 128 E820 entries passed via legacy bootloaders. But no, the _real_ meaning of 128 here is that of the memblock subsystem, which too happens to have a 128 entries limit for very early memblock regions (which is unrelated to E820), via INIT_MEMBLOCK_REGIONS ... So change the comment to a more comprehensible version: /* * The bootstrap memblock region count maximum is 128 entries * (INIT_MEMBLOCK_REGIONS), but EFI might pass us more E820 entries * than that - so allow memblock resizing. * * This is safe, because this call happens pretty late during x86 setup, * so we know about reserved memory regions already. (This is important * so that memblock resizing does no stomp over reserved areas.) */ memblock_allow_resize(); No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:37:42 +08:00
/* Throw away partial pages: */
memblock_trim_memory(PAGE_SIZE);
x86: Use memblock to replace early_res 1. replace find_e820_area with memblock_find_in_range 2. replace reserve_early with memblock_x86_reserve_range 3. replace free_early with memblock_x86_free_range. 4. NO_BOOTMEM will switch to use memblock too. 5. use _e820, _early wrap in the patch, in following patch, will replace them all 6. because memblock_x86_free_range support partial free, we can remove some special care 7. Need to make sure that memblock_find_in_range() is called after memblock_x86_fill() so adjust some calling later in setup.c::setup_arch() -- corruption_check and mptable_update -v2: Move reserve_brk() early Before fill_memblock_area, to avoid overlap between brk and memblock_find_in_range() that could happen We have more then 128 RAM entry in E820 tables, and memblock_x86_fill() could use memblock_find_in_range() to find a new place for memblock.memory.region array. and We don't need to use extend_brk() after fill_memblock_area() So move reserve_brk() early before fill_memblock_area(). -v3: Move find_smp_config early To make sure memblock_find_in_range not find wrong place, if BIOS doesn't put mptable in right place. -v4: Treat RESERVED_KERN as RAM in memblock.memory. and they are already in memblock.reserved already.. use __NOT_KEEP_MEMBLOCK to make sure memblock related code could be freed later. -v5: Generic version __memblock_find_in_range() is going from high to low, and for 32bit active_region for 32bit does include high pages need to replace the limit with memblock.default_alloc_limit, aka get_max_mapped() -v6: Use current_limit instead -v7: check with MEMBLOCK_ERROR instead of -1ULL or -1L -v8: Set memblock_can_resize early to handle EFI with more RAM entries -v9: update after kmemleak changes in mainline Suggested-by: David S. Miller <davem@davemloft.net> Suggested-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Suggested-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2010-08-26 04:39:17 +08:00
memblock_dump_all();
}
void __init memblock_find_dma_reserve(void)
{
#ifdef CONFIG_X86_64
u64 nr_pages = 0, nr_free_pages = 0;
unsigned long start_pfn, end_pfn;
phys_addr_t start, end;
int i;
u64 u;
/*
* need to find out used area below MAX_DMA_PFN
* need to use memblock to get free size in [0, MAX_DMA_PFN]
* at first, and assume boot_mem will not take below MAX_DMA_PFN
*/
for_each_mem_pfn_range(i, MAX_NUMNODES, &start_pfn, &end_pfn, NULL) {
start_pfn = min(start_pfn, MAX_DMA_PFN);
end_pfn = min(end_pfn, MAX_DMA_PFN);
nr_pages += end_pfn - start_pfn;
}
x86/boot/e820: Basic cleanup of e820.c Over the last decade or so e820.c has become an ureadable mess of tinkerware. Perform some very basic cleanups before doing more intricate cleanups, so that my eyes don't start bleeding when I look at it. Here's some of the excesses: - Total disregard of countless aspects of Documentation/CodingStyle. - Totally inconsistent hodge-podge of various coding styles and practices. - Gems like: (unsigned long long) e820_table->entries[i].addr ... which is a completely unnecessary type conversion of an u64 value. - Incomprehensible comments while there are major functions with absolutely no explanation - plus an armada of typos and grammar mistakes. - Mindless checkpatch artifacts such as: if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) { for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { - Actively misleading comments: /* In case someone cares... */ return who; ( The usage site of the return value just a few lines further down makes it clear that we very much care about the return value, we use it to print out the e820 map... ) - Colorfully inconsistent capitalization and punctuation throughout. - etc. This patch fixes only the worst excesses - there's more to fix. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 18:13:08 +08:00
for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) {
start_pfn = min_t(unsigned long, PFN_UP(start), MAX_DMA_PFN);
end_pfn = min_t(unsigned long, PFN_DOWN(end), MAX_DMA_PFN);
if (start_pfn < end_pfn)
nr_free_pages += end_pfn - start_pfn;
}
set_dma_reserve(nr_pages - nr_free_pages);
#endif
}