p71924506
/
linux_old1
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

arm64 updates for 4.12: 

- kdump support, including two necessary memblock additions:
   memblock_clear_nomap() and memblock_cap_memory_range()
 
 - ARMv8.3 HWCAP bits for JavaScript conversion instructions, complex
   numbers and weaker release consistency
 
 - arm64 ACPI platform MSI support
 
 - arm perf updates: ACPI PMU support, L3 cache PMU in some Qualcomm
   SoCs, Cortex-A53 L2 cache events and DTLB refills, MAINTAINERS update
   for DT perf bindings
 
 - architected timer errata framework (the arch/arm64 changes only)
 
 - support for DMA_ATTR_FORCE_CONTIGUOUS in the arm64 iommu DMA API
 
 - arm64 KVM refactoring to use common system register definitions
 
 - remove support for ASID-tagged VIVT I-cache (no ARMv8 implementation
   using it and deprecated in the architecture) together with some
   I-cache handling clean-up
 
 - PE/COFF EFI header clean-up/hardening
 
 - define BUG() instruction without CONFIG_BUG
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1
 
 iQIcBAABAgAGBQJZDKMoAAoJEGvWsS0AyF7xR+YP/0EMEz5MDfCv0PVYj7/AIa0G
 Zphl7OhysIkeDAz7urXw9Jdl0NfORNIqmD1vZNVSc321IyNp56Od+kWd82lBrOWB
 ad3nNT67pEmu0pAW7CO48ju3rTesEnEl3ra45E1tULeLihmv93jc4ZlfXgumlKq3
 /GE84XJ5ZFmluuhq1zgNefeUtyl1tbxTxHJ74+INF7dTd/5sJcphpqS4Dzpb+msT
 20WYliccQCBF9zBFUYHc2KjcXXKRQGxLulGS3MuoN2DLkD+U9YyR/OmA7SoXh2J2
 WXC5b0x856xTQJFCJ39pb7rw5xHjt3l5zfU3VLSvqEVL/+asBqCcgGNtNUgOW1Es
 dEHC6bc66Ley6mn7bbpFE3MK8D+K5q8HwMF6G5KDtIVB6DB/iQ6kzi5aXKoupxtb
 1EuU4OW6cDhmOFQYjgIDofLgqbmVvJofdF6+NfxasfZmWrMgHzv0rYvaCDnAV/Tr
 t7bhH7hf9/KcP/wpk86O2AMKKpgoNTqe1Qy8cWVFFLnut567Pb6zs/L3ZXfleoLv
 t613yM8Zj2fE05ja8ylMDjaasidNpXGttb08/4kAn06Daaoueqla0jmduAhy4aaV
 dQ3OFP9lJ5MFaFnMMTPfU3vtvNLMHuo9MZsYCrv5zCaNNs3lpAPUiPNh588ZscKa
 sWx4PEiaCi+wcOsLsJvh
 =SDkm
 -----END PGP SIGNATURE-----

Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

Pull arm64 updates from Catalin Marinas:

 - kdump support, including two necessary memblock additions:
   memblock_clear_nomap() and memblock_cap_memory_range()

 - ARMv8.3 HWCAP bits for JavaScript conversion instructions, complex
   numbers and weaker release consistency

 - arm64 ACPI platform MSI support

 - arm perf updates: ACPI PMU support, L3 cache PMU in some Qualcomm
   SoCs, Cortex-A53 L2 cache events and DTLB refills, MAINTAINERS update
   for DT perf bindings

 - architected timer errata framework (the arch/arm64 changes only)

 - support for DMA_ATTR_FORCE_CONTIGUOUS in the arm64 iommu DMA API

 - arm64 KVM refactoring to use common system register definitions

 - remove support for ASID-tagged VIVT I-cache (no ARMv8 implementation
   using it and deprecated in the architecture) together with some
   I-cache handling clean-up

 - PE/COFF EFI header clean-up/hardening

 - define BUG() instruction without CONFIG_BUG

* tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (92 commits)
  arm64: Fix the DMA mmap and get_sgtable API with DMA_ATTR_FORCE_CONTIGUOUS
  arm64: Print DT machine model in setup_machine_fdt()
  arm64: pmu: Wire-up Cortex A53 L2 cache events and DTLB refills
  arm64: module: split core and init PLT sections
  arm64: pmuv3: handle pmuv3+
  arm64: Add CNTFRQ_EL0 trap handler
  arm64: Silence spurious kbuild warning on menuconfig
  arm64: pmuv3: use arm_pmu ACPI framework
  arm64: pmuv3: handle !PMUv3 when probing
  drivers/perf: arm_pmu: add ACPI framework
  arm64: add function to get a cpu's MADT GICC table
  drivers/perf: arm_pmu: split out platform device probe logic
  drivers/perf: arm_pmu: move irq request/free into probe
  drivers/perf: arm_pmu: split cpu-local irq request/free
  drivers/perf: arm_pmu: rename irq request/free functions
  drivers/perf: arm_pmu: handle no platform_device
  drivers/perf: arm_pmu: simplify cpu_pmu_request_irqs()
  drivers/perf: arm_pmu: factor out pmu registration
  drivers/perf: arm_pmu: fold init into alloc
  drivers/perf: arm_pmu: define armpmu_init_fn
  ...
This commit is contained in:
Linus Torvalds 2017-05-05 12:11:37 -07:00
parent 7246f60068 92f66f84d9
commit ab182e67ec
77 changed files with 3761 additions and 1263 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
Documentation/arm64/cpu-feature-registers.txt
View File

@ -169,6 +169,18 @@ infrastructure:
as available on the CPU where it is fetched and is not a system
wide safe value.
4) ID_AA64ISAR1_EL1 - Instruction set attribute register 1
x--------------------------------------------------x
| Name | bits | visible |
|--------------------------------------------------|
| LRCPC | [23-20] | y |
|--------------------------------------------------|
| FCMA | [19-16] | y |
|--------------------------------------------------|
| JSCVT | [15-12] | y |
x--------------------------------------------------x
Appendix I: Example
---------------------------

45
Documentation/devicetree/bindings/chosen.txt
View File

@ -52,3 +52,48 @@ This property is set (currently only on PowerPC, and only needed on
book3e) by some versions of kexec-tools to tell the new kernel that it
is being booted by kexec, as the booting environment may differ (e.g.
a different secondary CPU release mechanism)
linux,usable-memory-range
-------------------------
This property (arm64 only) holds a base address and size, describing a
limited region in which memory may be considered available for use by
the kernel. Memory outside of this range is not available for use.
This property describes a limitation: memory within this range is only
valid when also described through another mechanism that the kernel
would otherwise use to determine available memory (e.g. memory nodes
or the EFI memory map). Valid memory may be sparse within the range.
e.g.
/ {
chosen {
linux,usable-memory-range = <0x9 0xf0000000 0x0 0x10000000>;
};
};
The main usage is for crash dump kernel to identify its own usable
memory and exclude, at its boot time, any other memory areas that are
part of the panicked kernel's memory.
While this property does not represent a real hardware, the address
and the size are expressed in #address-cells and #size-cells,
respectively, of the root node.
linux,elfcorehdr
----------------
This property (currently used only on arm64) holds the memory range,
the address and the size, of the elf core header which mainly describes
the panicked kernel's memory layout as PT_LOAD segments of elf format.
e.g.
/ {
chosen {
linux,elfcorehdr = <0x9 0xfffff000 0x0 0x800>;
};
};
While this property does not represent a real hardware, the address
and the size are expressed in #address-cells and #size-cells,
respectively, of the root node.

16
Documentation/kdump/kdump.txt
View File

@ -18,7 +18,7 @@ memory image to a dump file on the local disk, or across the network to
a remote system.
Kdump and kexec are currently supported on the x86, x86_64, ppc64, ia64,
s390x and arm architectures.
s390x, arm and arm64 architectures.
When the system kernel boots, it reserves a small section of memory for
the dump-capture kernel. This ensures that ongoing Direct Memory Access
@ -249,6 +249,13 @@ Dump-capture kernel config options (Arch Dependent, arm)
AUTO_ZRELADDR=y
Dump-capture kernel config options (Arch Dependent, arm64)
----------------------------------------------------------
- Please note that kvm of the dump-capture kernel will not be enabled
on non-VHE systems even if it is configured. This is because the CPU
will not be reset to EL2 on panic.
Extended crashkernel syntax
===========================
@ -305,6 +312,8 @@ Boot into System Kernel
kernel will automatically locate the crash kernel image within the
first 512MB of RAM if X is not given.
On arm64, use "crashkernel=Y[@X]". Note that the start address of
the kernel, X if explicitly specified, must be aligned to 2MiB (0x200000).
Load the Dump-capture Kernel
============================
@ -327,6 +336,8 @@ For s390x:
- Use image or bzImage
For arm:
- Use zImage
For arm64:
- Use vmlinux or Image
If you are using a uncompressed vmlinux image then use following command
to load dump-capture kernel.
@ -370,6 +381,9 @@ For s390x:
For arm:
"1 maxcpus=1 reset_devices"
For arm64:
"1 maxcpus=1 reset_devices"
Notes on loading the dump-capture kernel:
* By default, the ELF headers are stored in ELF64 format to support

25
Documentation/perf/qcom_l3_pmu.txt Normal file
View File

@ -0,0 +1,25 @@
Qualcomm Datacenter Technologies L3 Cache Performance Monitoring Unit (PMU)
===========================================================================
This driver supports the L3 cache PMUs found in Qualcomm Datacenter Technologies
Centriq SoCs. The L3 cache on these SOCs is composed of multiple slices, shared
by all cores within a socket. Each slice is exposed as a separate uncore perf
PMU with device name l3cache_<socket>_<instance>. User space is responsible
for aggregating across slices.
The driver provides a description of its available events and configuration
options in sysfs, see /sys/devices/l3cache*. Given that these are uncore PMUs
the driver also exposes a "cpumask" sysfs attribute which contains a mask
consisting of one CPU per socket which will be used to handle all the PMU
events on that socket.
The hardware implements 32bit event counters and has a flat 8bit event space
exposed via the "event" format attribute. In addition to the 32bit physical
counters the driver supports virtual 64bit hardware counters by using hardware
counter chaining. This feature is exposed via the "lc" (long counter) format
flag. E.g.:
perf stat -e l3cache_0_0/read-miss,lc/
Given that these are uncore PMUs the driver does not support sampling, therefore
"perf record" will not work. Per-task perf sessions are not supported.

1
MAINTAINERS
View File

@ -983,6 +983,7 @@ F: arch/arm*/include/asm/perf_event.h
F: drivers/perf/*
F: include/linux/perf/arm_pmu.h
F: Documentation/devicetree/bindings/arm/pmu.txt
F: Documentation/devicetree/bindings/perf/
ARM PORT
M: Russell King <linux@armlinux.org.uk>

11
arch/arm64/Kconfig
View File

@ -736,6 +736,17 @@ config KEXEC
but it is independent of the system firmware. And like a reboot
you can start any kernel with it, not just Linux.
config CRASH_DUMP
bool "Build kdump crash kernel"
help
Generate crash dump after being started by kexec. This should
be normally only set in special crash dump kernels which are
loaded in the main kernel with kexec-tools into a specially
reserved region and then later executed after a crash by
kdump/kexec.
For more details see Documentation/kdump/kdump.txt
config XEN_DOM0
def_bool y
depends on XEN

4
arch/arm64/Kconfig.debug
View File

@ -92,6 +92,10 @@ config DEBUG_EFI
the kernel that are only useful when using a debug build of the
UEFI firmware
config ARM64_RELOC_TEST
depends on m
tristate "Relocation testing module"
source "drivers/hwtracing/coresight/Kconfig"
endmenu

4
arch/arm64/Makefile
View File

@ -37,10 +37,12 @@ $(warning LSE atomics not supported by binutils)
endif
endif
ifeq ($(CONFIG_ARM64), y)
brokengasinst := $(call as-instr,1:\n.inst 0\n.rept . - 1b\n\nnop\n.endr\n,,-DCONFIG_BROKEN_GAS_INST=1)
ifneq ($(brokengasinst),)
ifneq ($(brokengasinst),)
$(warning Detected assembler with broken .inst; disassembly will be unreliable)
endif
endif
KBUILD_CFLAGS += -mgeneral-regs-only $(lseinstr) $(brokengasinst)

1
arch/arm64/configs/defconfig
View File

@ -82,6 +82,7 @@ CONFIG_CMA=y
CONFIG_SECCOMP=y
CONFIG_XEN=y
CONFIG_KEXEC=y
CONFIG_CRASH_DUMP=y
# CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS is not set
CONFIG_COMPAT=y
CONFIG_CPU_IDLE=y

2
arch/arm64/include/asm/acpi.h
View File

@ -85,6 +85,8 @@ static inline bool acpi_has_cpu_in_madt(void)
return true;
}
struct acpi_madt_generic_interrupt *acpi_cpu_get_madt_gicc(int cpu);
static inline void arch_fix_phys_package_id(int num, u32 slot) { }
void __init acpi_init_cpus(void);

81
arch/arm64/include/asm/arch_gicv3.h
View File

@ -20,69 +20,14 @@
#include <asm/sysreg.h>
#define ICC_EOIR1_EL1 sys_reg(3, 0, 12, 12, 1)
#define ICC_DIR_EL1 sys_reg(3, 0, 12, 11, 1)
#define ICC_IAR1_EL1 sys_reg(3, 0, 12, 12, 0)
#define ICC_SGI1R_EL1 sys_reg(3, 0, 12, 11, 5)
#define ICC_PMR_EL1 sys_reg(3, 0, 4, 6, 0)
#define ICC_CTLR_EL1 sys_reg(3, 0, 12, 12, 4)
#define ICC_SRE_EL1 sys_reg(3, 0, 12, 12, 5)
#define ICC_GRPEN1_EL1 sys_reg(3, 0, 12, 12, 7)
#define ICC_BPR1_EL1 sys_reg(3, 0, 12, 12, 3)
#define ICC_SRE_EL2 sys_reg(3, 4, 12, 9, 5)
/*
* System register definitions
*/
#define ICH_VSEIR_EL2 sys_reg(3, 4, 12, 9, 4)
#define ICH_HCR_EL2 sys_reg(3, 4, 12, 11, 0)
#define ICH_VTR_EL2 sys_reg(3, 4, 12, 11, 1)
#define ICH_MISR_EL2 sys_reg(3, 4, 12, 11, 2)
#define ICH_EISR_EL2 sys_reg(3, 4, 12, 11, 3)
#define ICH_ELSR_EL2 sys_reg(3, 4, 12, 11, 5)
#define ICH_VMCR_EL2 sys_reg(3, 4, 12, 11, 7)
#define __LR0_EL2(x) sys_reg(3, 4, 12, 12, x)
#define __LR8_EL2(x) sys_reg(3, 4, 12, 13, x)
#define ICH_LR0_EL2 __LR0_EL2(0)
#define ICH_LR1_EL2 __LR0_EL2(1)
#define ICH_LR2_EL2 __LR0_EL2(2)
#define ICH_LR3_EL2 __LR0_EL2(3)
#define ICH_LR4_EL2 __LR0_EL2(4)
#define ICH_LR5_EL2 __LR0_EL2(5)
#define ICH_LR6_EL2 __LR0_EL2(6)
#define ICH_LR7_EL2 __LR0_EL2(7)
#define ICH_LR8_EL2 __LR8_EL2(0)
#define ICH_LR9_EL2 __LR8_EL2(1)
#define ICH_LR10_EL2 __LR8_EL2(2)
#define ICH_LR11_EL2 __LR8_EL2(3)
#define ICH_LR12_EL2 __LR8_EL2(4)
#define ICH_LR13_EL2 __LR8_EL2(5)
#define ICH_LR14_EL2 __LR8_EL2(6)
#define ICH_LR15_EL2 __LR8_EL2(7)
#define __AP0Rx_EL2(x) sys_reg(3, 4, 12, 8, x)
#define ICH_AP0R0_EL2 __AP0Rx_EL2(0)
#define ICH_AP0R1_EL2 __AP0Rx_EL2(1)
#define ICH_AP0R2_EL2 __AP0Rx_EL2(2)
#define ICH_AP0R3_EL2 __AP0Rx_EL2(3)
#define __AP1Rx_EL2(x) sys_reg(3, 4, 12, 9, x)
#define ICH_AP1R0_EL2 __AP1Rx_EL2(0)
#define ICH_AP1R1_EL2 __AP1Rx_EL2(1)
#define ICH_AP1R2_EL2 __AP1Rx_EL2(2)
#define ICH_AP1R3_EL2 __AP1Rx_EL2(3)
#ifndef __ASSEMBLY__
#include <linux/stringify.h>
#include <asm/barrier.h>
#include <asm/cacheflush.h>
#define read_gicreg read_sysreg_s
#define write_gicreg write_sysreg_s
#define read_gicreg(r) read_sysreg_s(SYS_ ## r)
#define write_gicreg(v, r) write_sysreg_s(v, SYS_ ## r)
/*
* Low-level accessors
@ -93,13 +38,13 @@
static inline void gic_write_eoir(u32 irq)
{
write_sysreg_s(irq, ICC_EOIR1_EL1);
write_sysreg_s(irq, SYS_ICC_EOIR1_EL1);
isb();
}
static inline void gic_write_dir(u32 irq)
{
write_sysreg_s(irq, ICC_DIR_EL1);
write_sysreg_s(irq, SYS_ICC_DIR_EL1);
isb();
}
@ -107,7 +52,7 @@ static inline u64 gic_read_iar_common(void)
{
u64 irqstat;
irqstat = read_sysreg_s(ICC_IAR1_EL1);
irqstat = read_sysreg_s(SYS_ICC_IAR1_EL1);
dsb(sy);
return irqstat;
}
@ -124,7 +69,7 @@ static inline u64 gic_read_iar_cavium_thunderx(void)
u64 irqstat;
nops(8);
irqstat = read_sysreg_s(ICC_IAR1_EL1);
irqstat = read_sysreg_s(SYS_ICC_IAR1_EL1);
nops(4);
mb();
@ -133,40 +78,40 @@ static inline u64 gic_read_iar_cavium_thunderx(void)
static inline void gic_write_pmr(u32 val)
{
write_sysreg_s(val, ICC_PMR_EL1);
write_sysreg_s(val, SYS_ICC_PMR_EL1);
}
static inline void gic_write_ctlr(u32 val)
{
write_sysreg_s(val, ICC_CTLR_EL1);
write_sysreg_s(val, SYS_ICC_CTLR_EL1);
isb();
}
static inline void gic_write_grpen1(u32 val)
{
write_sysreg_s(val, ICC_GRPEN1_EL1);
write_sysreg_s(val, SYS_ICC_GRPEN1_EL1);
isb();
}
static inline void gic_write_sgi1r(u64 val)
{
write_sysreg_s(val, ICC_SGI1R_EL1);
write_sysreg_s(val, SYS_ICC_SGI1R_EL1);
}
static inline u32 gic_read_sre(void)
{
return read_sysreg_s(ICC_SRE_EL1);
return read_sysreg_s(SYS_ICC_SRE_EL1);
}
static inline void gic_write_sre(u32 val)
{
write_sysreg_s(val, ICC_SRE_EL1);
write_sysreg_s(val, SYS_ICC_SRE_EL1);
isb();
}
static inline void gic_write_bpr1(u32 val)
{
asm volatile("msr_s " __stringify(ICC_BPR1_EL1) ", %0" : : "r" (val));
write_sysreg_s(val, SYS_ICC_BPR1_EL1);
}
#define gic_read_typer(c) readq_relaxed(c)

32
arch/arm64/include/asm/bug.h
View File

@ -20,9 +20,6 @@
#include <asm/brk-imm.h>
#ifdef CONFIG_GENERIC_BUG
#define HAVE_ARCH_BUG
#ifdef CONFIG_DEBUG_BUGVERBOSE
#define _BUGVERBOSE_LOCATION(file, line) __BUGVERBOSE_LOCATION(file, line)
#define __BUGVERBOSE_LOCATION(file, line) \
@ -36,28 +33,35 @@
#define _BUGVERBOSE_LOCATION(file, line)
#endif
#define _BUG_FLAGS(flags) __BUG_FLAGS(flags)
#ifdef CONFIG_GENERIC_BUG
#define __BUG_FLAGS(flags) asm volatile ( \
#define __BUG_ENTRY(flags) \
".pushsection __bug_table,\"a\"\n\t" \
".align 2\n\t" \
"0: .long 1f - 0b\n\t" \
_BUGVERBOSE_LOCATION(__FILE__, __LINE__) \
".short " #flags "\n\t" \
".popsection\n" \
\
"1: brk %[imm]" \
:: [imm] "i" (BUG_BRK_IMM) \
)
"1: "
#else
#define __BUG_ENTRY(flags) ""
#endif
#define BUG() do { \
_BUG_FLAGS(0); \
unreachable(); \
#define __BUG_FLAGS(flags) \
asm volatile ( \
__BUG_ENTRY(flags) \
"brk %[imm]" :: [imm] "i" (BUG_BRK_IMM) \
);
#define BUG() do { \
__BUG_FLAGS(0); \
unreachable(); \
} while (0)
#define __WARN_FLAGS(flags) _BUG_FLAGS(BUGFLAG_WARNING|(flags))
#define __WARN_FLAGS(flags) __BUG_FLAGS(BUGFLAG_WARNING|(flags))
#endif /* ! CONFIG_GENERIC_BUG */
#define HAVE_ARCH_BUG
#include <asm-generic/bug.h>

38
arch/arm64/include/asm/cache.h
View File

@ -16,7 +16,18 @@
#ifndef __ASM_CACHE_H
#define __ASM_CACHE_H
#include <asm/cachetype.h>
#include <asm/cputype.h>
#define CTR_L1IP_SHIFT 14
#define CTR_L1IP_MASK 3
#define CTR_CWG_SHIFT 24
#define CTR_CWG_MASK 15
#define CTR_L1IP(ctr) (((ctr) >> CTR_L1IP_SHIFT) & CTR_L1IP_MASK)
#define ICACHE_POLICY_VPIPT 0
#define ICACHE_POLICY_VIPT 2
#define ICACHE_POLICY_PIPT 3
#define L1_CACHE_SHIFT 7
#define L1_CACHE_BYTES (1 << L1_CACHE_SHIFT)
@ -32,6 +43,31 @@
#ifndef __ASSEMBLY__
#include <linux/bitops.h>
#define ICACHEF_ALIASING 0
#define ICACHEF_VPIPT 1
extern unsigned long __icache_flags;
/*
* Whilst the D-side always behaves as PIPT on AArch64, aliasing is
* permitted in the I-cache.
*/
static inline int icache_is_aliasing(void)
{
return test_bit(ICACHEF_ALIASING, &__icache_flags);
}
static inline int icache_is_vpipt(void)
{
return test_bit(ICACHEF_VPIPT, &__icache_flags);
}
static inline u32 cache_type_cwg(void)
{
return (read_cpuid_cachetype() >> CTR_CWG_SHIFT) & CTR_CWG_MASK;
}
#define __read_mostly __attribute__((__section__(".data..read_mostly")))
static inline int cache_line_size(void)

1
arch/arm64/include/asm/cacheflush.h
View File

@ -154,5 +154,6 @@ int set_memory_ro(unsigned long addr, int numpages);
int set_memory_rw(unsigned long addr, int numpages);
int set_memory_x(unsigned long addr, int numpages);
int set_memory_nx(unsigned long addr, int numpages);
int set_memory_valid(unsigned long addr, unsigned long size, int enable);
#endif

100
arch/arm64/include/asm/cachetype.h
View File

@ -1,100 +0,0 @@
/*
* Copyright (C) 2012 ARM Ltd.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef __ASM_CACHETYPE_H
#define __ASM_CACHETYPE_H
#include <asm/cputype.h>
#define CTR_L1IP_SHIFT 14
#define CTR_L1IP_MASK 3
#define CTR_CWG_SHIFT 24
#define CTR_CWG_MASK 15
#define ICACHE_POLICY_RESERVED 0
#define ICACHE_POLICY_AIVIVT 1
#define ICACHE_POLICY_VIPT 2
#define ICACHE_POLICY_PIPT 3
#ifndef __ASSEMBLY__
#include <linux/bitops.h>
#define CTR_L1IP(ctr) (((ctr) >> CTR_L1IP_SHIFT) & CTR_L1IP_MASK)
#define ICACHEF_ALIASING 0
#define ICACHEF_AIVIVT 1
extern unsigned long __icache_flags;
/*
* NumSets, bits[27:13] - (Number of sets in cache) - 1
* Associativity, bits[12:3] - (Associativity of cache) - 1
* LineSize, bits[2:0] - (Log2(Number of words in cache line)) - 2
*/
#define CCSIDR_EL1_WRITE_THROUGH BIT(31)
#define CCSIDR_EL1_WRITE_BACK BIT(30)
#define CCSIDR_EL1_READ_ALLOCATE BIT(29)
#define CCSIDR_EL1_WRITE_ALLOCATE BIT(28)
#define CCSIDR_EL1_LINESIZE_MASK 0x7
#define CCSIDR_EL1_LINESIZE(x) ((x) & CCSIDR_EL1_LINESIZE_MASK)
#define CCSIDR_EL1_ASSOCIATIVITY_SHIFT 3
#define CCSIDR_EL1_ASSOCIATIVITY_MASK 0x3ff
#define CCSIDR_EL1_ASSOCIATIVITY(x) \
(((x) >> CCSIDR_EL1_ASSOCIATIVITY_SHIFT) & CCSIDR_EL1_ASSOCIATIVITY_MASK)
#define CCSIDR_EL1_NUMSETS_SHIFT 13
#define CCSIDR_EL1_NUMSETS_MASK 0x7fff
#define CCSIDR_EL1_NUMSETS(x) \
(((x) >> CCSIDR_EL1_NUMSETS_SHIFT) & CCSIDR_EL1_NUMSETS_MASK)
#define CACHE_LINESIZE(x) (16 << CCSIDR_EL1_LINESIZE(x))
#define CACHE_NUMSETS(x) (CCSIDR_EL1_NUMSETS(x) + 1)
#define CACHE_ASSOCIATIVITY(x) (CCSIDR_EL1_ASSOCIATIVITY(x) + 1)
extern u64 __attribute_const__ cache_get_ccsidr(u64 csselr);
/* Helpers for Level 1 Instruction cache csselr = 1L */
static inline int icache_get_linesize(void)
{
return CACHE_LINESIZE(cache_get_ccsidr(1L));
}
static inline int icache_get_numsets(void)
{
return CACHE_NUMSETS(cache_get_ccsidr(1L));
}
/*
* Whilst the D-side always behaves as PIPT on AArch64, aliasing is
* permitted in the I-cache.
*/
static inline int icache_is_aliasing(void)
{
return test_bit(ICACHEF_ALIASING, &__icache_flags);
}
static inline int icache_is_aivivt(void)
{
return test_bit(ICACHEF_AIVIVT, &__icache_flags);
}
static inline u32 cache_type_cwg(void)
{
return (read_cpuid_cachetype() >> CTR_CWG_SHIFT) & CTR_CWG_MASK;
}
#endif /* __ASSEMBLY__ */
#endif /* __ASM_CACHETYPE_H */

4
arch/arm64/include/asm/cpufeature.h
View File

@ -226,7 +226,7 @@ void update_cpu_errata_workarounds(void);
void __init enable_errata_workarounds(void);
void verify_local_cpu_errata_workarounds(void);
u64 read_system_reg(u32 id);
u64 read_sanitised_ftr_reg(u32 id);
static inline bool cpu_supports_mixed_endian_el0(void)
{
@ -240,7 +240,7 @@ static inline bool system_supports_32bit_el0(void)
static inline bool system_supports_mixed_endian_el0(void)
{
return id_aa64mmfr0_mixed_endian_el0(read_system_reg(SYS_ID_AA64MMFR0_EL1));
return id_aa64mmfr0_mixed_endian_el0(read_sanitised_ftr_reg(SYS_ID_AA64MMFR0_EL1));
}
static inline bool system_supports_fpsimd(void)

4
arch/arm64/include/asm/esr.h
View File

@ -177,6 +177,10 @@
#define ESR_ELx_SYS64_ISS_SYS_CNTVCT (ESR_ELx_SYS64_ISS_SYS_VAL(3, 3, 2, 14, 0) | \
ESR_ELx_SYS64_ISS_DIR_READ)
#define ESR_ELx_SYS64_ISS_SYS_CNTFRQ (ESR_ELx_SYS64_ISS_SYS_VAL(3, 3, 0, 14, 0) | \
ESR_ELx_SYS64_ISS_DIR_READ)
#ifndef __ASSEMBLY__
#include <asm/types.h>

2
arch/arm64/include/asm/hardirq.h
View File

@ -20,7 +20,7 @@
#include <linux/threads.h>
#include <asm/irq.h>
#define NR_IPI 6
#define NR_IPI 7
typedef struct {
unsigned int __softirq_pending;

4
arch/arm64/include/asm/hw_breakpoint.h
View File

@ -149,7 +149,7 @@ static inline void ptrace_hw_copy_thread(struct task_struct *task)
/* Determine number of BRP registers available. */
static inline int get_num_brps(void)
{
u64 dfr0 = read_system_reg(SYS_ID_AA64DFR0_EL1);
u64 dfr0 = read_sanitised_ftr_reg(SYS_ID_AA64DFR0_EL1);
return 1 +
cpuid_feature_extract_unsigned_field(dfr0,
ID_AA64DFR0_BRPS_SHIFT);
@ -158,7 +158,7 @@ static inline int get_num_brps(void)
/* Determine number of WRP registers available. */
static inline int get_num_wrps(void)
{
u64 dfr0 = read_system_reg(SYS_ID_AA64DFR0_EL1);
u64 dfr0 = read_sanitised_ftr_reg(SYS_ID_AA64DFR0_EL1);
return 1 +
cpuid_feature_extract_unsigned_field(dfr0,
ID_AA64DFR0_WRPS_SHIFT);

52
arch/arm64/include/asm/kexec.h
View File

@ -40,9 +40,59 @@
static inline void crash_setup_regs(struct pt_regs *newregs,
struct pt_regs *oldregs)
{
/* Empty routine needed to avoid build errors. */
if (oldregs) {
memcpy(newregs, oldregs, sizeof(*newregs));
} else {
u64 tmp1, tmp2;
__asm__ __volatile__ (
"stp x0, x1, [%2, #16 * 0]\n"
"stp x2, x3, [%2, #16 * 1]\n"
"stp x4, x5, [%2, #16 * 2]\n"
"stp x6, x7, [%2, #16 * 3]\n"
"stp x8, x9, [%2, #16 * 4]\n"
"stp x10, x11, [%2, #16 * 5]\n"
"stp x12, x13, [%2, #16 * 6]\n"
"stp x14, x15, [%2, #16 * 7]\n"
"stp x16, x17, [%2, #16 * 8]\n"
"stp x18, x19, [%2, #16 * 9]\n"
"stp x20, x21, [%2, #16 * 10]\n"
"stp x22, x23, [%2, #16 * 11]\n"
"stp x24, x25, [%2, #16 * 12]\n"
"stp x26, x27, [%2, #16 * 13]\n"
"stp x28, x29, [%2, #16 * 14]\n"
"mov %0, sp\n"
"stp x30, %0, [%2, #16 * 15]\n"
"/* faked current PSTATE */\n"
"mrs %0, CurrentEL\n"
"mrs %1, SPSEL\n"
"orr %0, %0, %1\n"
"mrs %1, DAIF\n"
"orr %0, %0, %1\n"
"mrs %1, NZCV\n"
"orr %0, %0, %1\n"
/* pc */
"adr %1, 1f\n"
"1:\n"
"stp %1, %0, [%2, #16 * 16]\n"
: "=&r" (tmp1), "=&r" (tmp2)
: "r" (newregs)
: "memory"
);
}
}
#if defined(CONFIG_KEXEC_CORE) && defined(CONFIG_HIBERNATION)
extern bool crash_is_nosave(unsigned long pfn);
extern void crash_prepare_suspend(void);
extern void crash_post_resume(void);
#else
static inline bool crash_is_nosave(unsigned long pfn) {return false; }
static inline void crash_prepare_suspend(void) {}
static inline void crash_post_resume(void) {}
#endif
#endif /* __ASSEMBLY__ */
#endif

13
arch/arm64/include/asm/kvm_mmu.h
View File

@ -108,7 +108,7 @@ alternative_else_nop_endif
#else
#include <asm/pgalloc.h>
#include <asm/cachetype.h>
#include <asm/cache.h>
#include <asm/cacheflush.h>
#include <asm/mmu_context.h>
#include <asm/pgtable.h>
@ -242,12 +242,13 @@ static inline void __coherent_cache_guest_page(struct kvm_vcpu *vcpu,
kvm_flush_dcache_to_poc(va, size);
if (!icache_is_aliasing()) { /* PIPT */
flush_icache_range((unsigned long)va,
(unsigned long)va + size);
} else if (!icache_is_aivivt()) { /* non ASID-tagged VIVT */
if (icache_is_aliasing()) {
/* any kind of VIPT cache */
__flush_icache_all();
} else if (is_kernel_in_hyp_mode() || !icache_is_vpipt()) {
/* PIPT or VPIPT at EL2 (see comment in __kvm_tlb_flush_vmid_ipa) */
flush_icache_range((unsigned long)va,
(unsigned long)va + size);
}
}
@ -307,7 +308,7 @@ static inline void __kvm_extend_hypmap(pgd_t *boot_hyp_pgd,
static inline unsigned int kvm_get_vmid_bits(void)
{
int reg = read_system_reg(SYS_ID_AA64MMFR1_EL1);
int reg = read_sanitised_ftr_reg(SYS_ID_AA64MMFR1_EL1);
return (cpuid_feature_extract_unsigned_field(reg, ID_AA64MMFR1_VMIDBITS_SHIFT) == 2) ? 16 : 8;
}

1
arch/arm64/include/asm/mmu.h
View File

@ -37,5 +37,6 @@ extern void create_pgd_mapping(struct mm_struct *mm, phys_addr_t phys,
unsigned long virt, phys_addr_t size,
pgprot_t prot, bool page_mappings_only);
extern void *fixmap_remap_fdt(phys_addr_t dt_phys);
extern void mark_linear_text_alias_ro(void);
#endif

14
arch/arm64/include/asm/module.h
View File

@ -17,26 +17,26 @@
#define __ASM_MODULE_H
#include <asm-generic/module.h>
#include <asm/memory.h>
#define MODULE_ARCH_VERMAGIC "aarch64"
#ifdef CONFIG_ARM64_MODULE_PLTS
struct mod_arch_specific {
struct mod_plt_sec {
struct elf64_shdr *plt;
int plt_num_entries;
int plt_max_entries;
};
struct mod_arch_specific {
struct mod_plt_sec core;
struct mod_plt_sec init;
};
#endif
u64 module_emit_plt_entry(struct module *mod, const Elf64_Rela *rela,
u64 module_emit_plt_entry(struct module *mod, void *loc, const Elf64_Rela *rela,
Elf64_Sym *sym);
#ifdef CONFIG_RANDOMIZE_BASE
#ifdef CONFIG_MODVERSIONS
#define ARCH_RELOCATES_KCRCTAB
#define reloc_start (kimage_vaddr - KIMAGE_VADDR)
#endif
extern u64 module_alloc_base;
#else
#define module_alloc_base ((u64)_etext - MODULES_VSIZE)

10
arch/arm64/include/asm/pgtable.h
View File

@ -74,6 +74,16 @@ extern unsigned long empty_zero_page[PAGE_SIZE / sizeof(unsigned long)];
#define pte_user_exec(pte) (!(pte_val(pte) & PTE_UXN))
#define pte_cont(pte) (!!(pte_val(pte) & PTE_CONT))
#define pte_cont_addr_end(addr, end) \
({ unsigned long __boundary = ((addr) + CONT_PTE_SIZE) & CONT_PTE_MASK; \
(__boundary - 1 < (end) - 1) ? __boundary : (end); \
})
#define pmd_cont_addr_end(addr, end) \
({ unsigned long __boundary = ((addr) + CONT_PMD_SIZE) & CONT_PMD_MASK; \
(__boundary - 1 < (end) - 1) ? __boundary : (end); \
})
#ifdef CONFIG_ARM64_HW_AFDBM
#define pte_hw_dirty(pte) (pte_write(pte) && !(pte_val(pte) & PTE_RDONLY))
#else

2
arch/arm64/include/asm/processor.h
View File

@ -50,6 +50,7 @@ extern phys_addr_t arm64_dma_phys_limit;
#define ARCH_LOW_ADDRESS_LIMIT (arm64_dma_phys_limit - 1)
struct debug_info {
#ifdef CONFIG_HAVE_HW_BREAKPOINT
/* Have we suspended stepping by a debugger? */
int suspended_step;
/* Allow breakpoints and watchpoints to be disabled for this thread. */
@ -58,6 +59,7 @@ struct debug_info {
/* Hardware breakpoints pinned to this task. */
struct perf_event *hbp_break[ARM_MAX_BRP];
struct perf_event *hbp_watch[ARM_MAX_WRP];
#endif
};
struct cpu_context {

2
arch/arm64/include/asm/sections.h
View File

@ -24,6 +24,8 @@ extern char __hibernate_exit_text_start[], __hibernate_exit_text_end[];
extern char __hyp_idmap_text_start[], __hyp_idmap_text_end[];
extern char __hyp_text_start[], __hyp_text_end[];
extern char __idmap_text_start[], __idmap_text_end[];
extern char __initdata_begin[], __initdata_end[];
extern char __inittext_begin[], __inittext_end[];
extern char __irqentry_text_start[], __irqentry_text_end[];
extern char __mmuoff_data_start[], __mmuoff_data_end[];

3
arch/arm64/include/asm/smp.h
View File

@ -148,6 +148,9 @@ static inline void cpu_panic_kernel(void)
*/
bool cpus_are_stuck_in_kernel(void);
extern void smp_send_crash_stop(void);
extern bool smp_crash_stop_failed(void);
#endif /* ifndef __ASSEMBLY__ */
#endif /* ifndef __ASM_SMP_H */

167
arch/arm64/include/asm/sysreg.h
View File

@ -48,6 +48,8 @@
((crn) << CRn_shift) | ((crm) << CRm_shift) | \
((op2) << Op2_shift))
#define sys_insn sys_reg
#define sys_reg_Op0(id) (((id) >> Op0_shift) & Op0_mask)
#define sys_reg_Op1(id) (((id) >> Op1_shift) & Op1_mask)
#define sys_reg_CRn(id) (((id) >> CRn_shift) & CRn_mask)
@ -81,6 +83,41 @@
#endif /* CONFIG_BROKEN_GAS_INST */
#define REG_PSTATE_PAN_IMM sys_reg(0, 0, 4, 0, 4)
#define REG_PSTATE_UAO_IMM sys_reg(0, 0, 4, 0, 3)
#define SET_PSTATE_PAN(x) __emit_inst(0xd5000000 | REG_PSTATE_PAN_IMM | \
(!!x)<<8 | 0x1f)
#define SET_PSTATE_UAO(x) __emit_inst(0xd5000000 | REG_PSTATE_UAO_IMM | \
(!!x)<<8 | 0x1f)
#define SYS_DC_ISW sys_insn(1, 0, 7, 6, 2)
#define SYS_DC_CSW sys_insn(1, 0, 7, 10, 2)
#define SYS_DC_CISW sys_insn(1, 0, 7, 14, 2)
#define SYS_OSDTRRX_EL1 sys_reg(2, 0, 0, 0, 2)
#define SYS_MDCCINT_EL1 sys_reg(2, 0, 0, 2, 0)
#define SYS_MDSCR_EL1 sys_reg(2, 0, 0, 2, 2)
#define SYS_OSDTRTX_EL1 sys_reg(2, 0, 0, 3, 2)
#define SYS_OSECCR_EL1 sys_reg(2, 0, 0, 6, 2)
#define SYS_DBGBVRn_EL1(n) sys_reg(2, 0, 0, n, 4)
#define SYS_DBGBCRn_EL1(n) sys_reg(2, 0, 0, n, 5)
#define SYS_DBGWVRn_EL1(n) sys_reg(2, 0, 0, n, 6)
#define SYS_DBGWCRn_EL1(n) sys_reg(2, 0, 0, n, 7)
#define SYS_MDRAR_EL1 sys_reg(2, 0, 1, 0, 0)
#define SYS_OSLAR_EL1 sys_reg(2, 0, 1, 0, 4)
#define SYS_OSLSR_EL1 sys_reg(2, 0, 1, 1, 4)
#define SYS_OSDLR_EL1 sys_reg(2, 0, 1, 3, 4)
#define SYS_DBGPRCR_EL1 sys_reg(2, 0, 1, 4, 4)
#define SYS_DBGCLAIMSET_EL1 sys_reg(2, 0, 7, 8, 6)
#define SYS_DBGCLAIMCLR_EL1 sys_reg(2, 0, 7, 9, 6)
#define SYS_DBGAUTHSTATUS_EL1 sys_reg(2, 0, 7, 14, 6)
#define SYS_MDCCSR_EL0 sys_reg(2, 3, 0, 1, 0)
#define SYS_DBGDTR_EL0 sys_reg(2, 3, 0, 4, 0)
#define SYS_DBGDTRRX_EL0 sys_reg(2, 3, 0, 5, 0)
#define SYS_DBGDTRTX_EL0 sys_reg(2, 3, 0, 5, 0)
#define SYS_DBGVCR32_EL2 sys_reg(2, 4, 0, 7, 0)
#define SYS_MIDR_EL1 sys_reg(3, 0, 0, 0, 0)
#define SYS_MPIDR_EL1 sys_reg(3, 0, 0, 0, 5)
#define SYS_REVIDR_EL1 sys_reg(3, 0, 0, 0, 6)
@ -88,6 +125,7 @@
#define SYS_ID_PFR0_EL1 sys_reg(3, 0, 0, 1, 0)
#define SYS_ID_PFR1_EL1 sys_reg(3, 0, 0, 1, 1)
#define SYS_ID_DFR0_EL1 sys_reg(3, 0, 0, 1, 2)
#define SYS_ID_AFR0_EL1 sys_reg(3, 0, 0, 1, 3)
#define SYS_ID_MMFR0_EL1 sys_reg(3, 0, 0, 1, 4)
#define SYS_ID_MMFR1_EL1 sys_reg(3, 0, 0, 1, 5)
#define SYS_ID_MMFR2_EL1 sys_reg(3, 0, 0, 1, 6)
@ -118,17 +156,127 @@
#define SYS_ID_AA64MMFR1_EL1 sys_reg(3, 0, 0, 7, 1)
#define SYS_ID_AA64MMFR2_EL1 sys_reg(3, 0, 0, 7, 2)
#define SYS_CNTFRQ_EL0 sys_reg(3, 3, 14, 0, 0)
#define SYS_SCTLR_EL1 sys_reg(3, 0, 1, 0, 0)
#define SYS_ACTLR_EL1 sys_reg(3, 0, 1, 0, 1)
#define SYS_CPACR_EL1 sys_reg(3, 0, 1, 0, 2)
#define SYS_TTBR0_EL1 sys_reg(3, 0, 2, 0, 0)
#define SYS_TTBR1_EL1 sys_reg(3, 0, 2, 0, 1)
#define SYS_TCR_EL1 sys_reg(3, 0, 2, 0, 2)
#define SYS_ICC_PMR_EL1 sys_reg(3, 0, 4, 6, 0)
#define SYS_AFSR0_EL1 sys_reg(3, 0, 5, 1, 0)
#define SYS_AFSR1_EL1 sys_reg(3, 0, 5, 1, 1)
#define SYS_ESR_EL1 sys_reg(3, 0, 5, 2, 0)
#define SYS_FAR_EL1 sys_reg(3, 0, 6, 0, 0)
#define SYS_PAR_EL1 sys_reg(3, 0, 7, 4, 0)
#define SYS_PMINTENSET_EL1 sys_reg(3, 0, 9, 14, 1)
#define SYS_PMINTENCLR_EL1 sys_reg(3, 0, 9, 14, 2)
#define SYS_MAIR_EL1 sys_reg(3, 0, 10, 2, 0)
#define SYS_AMAIR_EL1 sys_reg(3, 0, 10, 3, 0)
#define SYS_VBAR_EL1 sys_reg(3, 0, 12, 0, 0)
#define SYS_ICC_DIR_EL1 sys_reg(3, 0, 12, 11, 1)
#define SYS_ICC_SGI1R_EL1 sys_reg(3, 0, 12, 11, 5)
#define SYS_ICC_IAR1_EL1 sys_reg(3, 0, 12, 12, 0)
#define SYS_ICC_EOIR1_EL1 sys_reg(3, 0, 12, 12, 1)
#define SYS_ICC_BPR1_EL1 sys_reg(3, 0, 12, 12, 3)
#define SYS_ICC_CTLR_EL1 sys_reg(3, 0, 12, 12, 4)
#define SYS_ICC_SRE_EL1 sys_reg(3, 0, 12, 12, 5)
#define SYS_ICC_GRPEN1_EL1 sys_reg(3, 0, 12, 12, 7)
#define SYS_CONTEXTIDR_EL1 sys_reg(3, 0, 13, 0, 1)
#define SYS_TPIDR_EL1 sys_reg(3, 0, 13, 0, 4)
#define SYS_CNTKCTL_EL1 sys_reg(3, 0, 14, 1, 0)
#define SYS_CLIDR_EL1 sys_reg(3, 1, 0, 0, 1)
#define SYS_AIDR_EL1 sys_reg(3, 1, 0, 0, 7)
#define SYS_CSSELR_EL1 sys_reg(3, 2, 0, 0, 0)
#define SYS_CTR_EL0 sys_reg(3, 3, 0, 0, 1)
#define SYS_DCZID_EL0 sys_reg(3, 3, 0, 0, 7)
#define REG_PSTATE_PAN_IMM sys_reg(0, 0, 4, 0, 4)
#define REG_PSTATE_UAO_IMM sys_reg(0, 0, 4, 0, 3)
#define SYS_PMCR_EL0 sys_reg(3, 3, 9, 12, 0)
#define SYS_PMCNTENSET_EL0 sys_reg(3, 3, 9, 12, 1)
#define SYS_PMCNTENCLR_EL0 sys_reg(3, 3, 9, 12, 2)
#define SYS_PMOVSCLR_EL0 sys_reg(3, 3, 9, 12, 3)
#define SYS_PMSWINC_EL0 sys_reg(3, 3, 9, 12, 4)
#define SYS_PMSELR_EL0 sys_reg(3, 3, 9, 12, 5)
#define SYS_PMCEID0_EL0 sys_reg(3, 3, 9, 12, 6)
#define SYS_PMCEID1_EL0 sys_reg(3, 3, 9, 12, 7)
#define SYS_PMCCNTR_EL0 sys_reg(3, 3, 9, 13, 0)
#define SYS_PMXEVTYPER_EL0 sys_reg(3, 3, 9, 13, 1)
#define SYS_PMXEVCNTR_EL0 sys_reg(3, 3, 9, 13, 2)
#define SYS_PMUSERENR_EL0 sys_reg(3, 3, 9, 14, 0)
#define SYS_PMOVSSET_EL0 sys_reg(3, 3, 9, 14, 3)
#define SET_PSTATE_PAN(x) __emit_inst(0xd5000000 | REG_PSTATE_PAN_IMM | \
(!!x)<<8 | 0x1f)
#define SET_PSTATE_UAO(x) __emit_inst(0xd5000000 | REG_PSTATE_UAO_IMM | \
(!!x)<<8 | 0x1f)
#define SYS_TPIDR_EL0 sys_reg(3, 3, 13, 0, 2)
#define SYS_TPIDRRO_EL0 sys_reg(3, 3, 13, 0, 3)
#define SYS_CNTFRQ_EL0 sys_reg(3, 3, 14, 0, 0)
#define SYS_CNTP_TVAL_EL0 sys_reg(3, 3, 14, 2, 0)
#define SYS_CNTP_CTL_EL0 sys_reg(3, 3, 14, 2, 1)
#define SYS_CNTP_CVAL_EL0 sys_reg(3, 3, 14, 2, 2)
#define __PMEV_op2(n) ((n) & 0x7)
#define __CNTR_CRm(n) (0x8 | (((n) >> 3) & 0x3))
#define SYS_PMEVCNTRn_EL0(n) sys_reg(3, 3, 14, __CNTR_CRm(n), __PMEV_op2(n))
#define __TYPER_CRm(n) (0xc | (((n) >> 3) & 0x3))
#define SYS_PMEVTYPERn_EL0(n) sys_reg(3, 3, 14, __TYPER_CRm(n), __PMEV_op2(n))
#define SYS_PMCCFILTR_EL0 sys_reg (3, 3, 14, 15, 7)
#define SYS_DACR32_EL2 sys_reg(3, 4, 3, 0, 0)
#define SYS_IFSR32_EL2 sys_reg(3, 4, 5, 0, 1)
#define SYS_FPEXC32_EL2 sys_reg(3, 4, 5, 3, 0)
#define __SYS__AP0Rx_EL2(x) sys_reg(3, 4, 12, 8, x)
#define SYS_ICH_AP0R0_EL2 __SYS__AP0Rx_EL2(0)
#define SYS_ICH_AP0R1_EL2 __SYS__AP0Rx_EL2(1)
#define SYS_ICH_AP0R2_EL2 __SYS__AP0Rx_EL2(2)
#define SYS_ICH_AP0R3_EL2 __SYS__AP0Rx_EL2(3)
#define __SYS__AP1Rx_EL2(x) sys_reg(3, 4, 12, 9, x)
#define SYS_ICH_AP1R0_EL2 __SYS__AP1Rx_EL2(0)
#define SYS_ICH_AP1R1_EL2 __SYS__AP1Rx_EL2(1)
#define SYS_ICH_AP1R2_EL2 __SYS__AP1Rx_EL2(2)
#define SYS_ICH_AP1R3_EL2 __SYS__AP1Rx_EL2(3)
#define SYS_ICH_VSEIR_EL2 sys_reg(3, 4, 12, 9, 4)
#define SYS_ICC_SRE_EL2 sys_reg(3, 4, 12, 9, 5)
#define SYS_ICH_HCR_EL2 sys_reg(3, 4, 12, 11, 0)
#define SYS_ICH_VTR_EL2 sys_reg(3, 4, 12, 11, 1)
#define SYS_ICH_MISR_EL2 sys_reg(3, 4, 12, 11, 2)
#define SYS_ICH_EISR_EL2 sys_reg(3, 4, 12, 11, 3)
#define SYS_ICH_ELSR_EL2 sys_reg(3, 4, 12, 11, 5)
#define SYS_ICH_VMCR_EL2 sys_reg(3, 4, 12, 11, 7)
#define __SYS__LR0_EL2(x) sys_reg(3, 4, 12, 12, x)
#define SYS_ICH_LR0_EL2 __SYS__LR0_EL2(0)
#define SYS_ICH_LR1_EL2 __SYS__LR0_EL2(1)
#define SYS_ICH_LR2_EL2 __SYS__LR0_EL2(2)
#define SYS_ICH_LR3_EL2 __SYS__LR0_EL2(3)
#define SYS_ICH_LR4_EL2 __SYS__LR0_EL2(4)
#define SYS_ICH_LR5_EL2 __SYS__LR0_EL2(5)
#define SYS_ICH_LR6_EL2 __SYS__LR0_EL2(6)
#define SYS_ICH_LR7_EL2 __SYS__LR0_EL2(7)
#define __SYS__LR8_EL2(x) sys_reg(3, 4, 12, 13, x)
#define SYS_ICH_LR8_EL2 __SYS__LR8_EL2(0)
#define SYS_ICH_LR9_EL2 __SYS__LR8_EL2(1)
#define SYS_ICH_LR10_EL2 __SYS__LR8_EL2(2)
#define SYS_ICH_LR11_EL2 __SYS__LR8_EL2(3)
#define SYS_ICH_LR12_EL2 __SYS__LR8_EL2(4)
#define SYS_ICH_LR13_EL2 __SYS__LR8_EL2(5)
#define SYS_ICH_LR14_EL2 __SYS__LR8_EL2(6)
#define SYS_ICH_LR15_EL2 __SYS__LR8_EL2(7)
/* Common SCTLR_ELx flags. */
#define SCTLR_ELx_EE (1 << 25)
@ -156,6 +304,11 @@
#define ID_AA64ISAR0_SHA1_SHIFT 8
#define ID_AA64ISAR0_AES_SHIFT 4
/* id_aa64isar1 */
#define ID_AA64ISAR1_LRCPC_SHIFT 20
#define ID_AA64ISAR1_FCMA_SHIFT 16
#define ID_AA64ISAR1_JSCVT_SHIFT 12
/* id_aa64pfr0 */
#define ID_AA64PFR0_GIC_SHIFT 24
#define ID_AA64PFR0_ASIMD_SHIFT 20

3
arch/arm64/include/uapi/asm/hwcap.h
View File

@ -32,5 +32,8 @@
#define HWCAP_ASIMDHP (1 << 10)
#define HWCAP_CPUID (1 << 11)
#define HWCAP_ASIMDRDM (1 << 12)
#define HWCAP_JSCVT (1 << 13)
#define HWCAP_FCMA (1 << 14)
#define HWCAP_LRCPC (1 << 15)
#endif /* _UAPI__ASM_HWCAP_H */

3
arch/arm64/kernel/Makefile
View File

@ -50,6 +50,9 @@ arm64-obj-$(CONFIG_RANDOMIZE_BASE) += kaslr.o
arm64-obj-$(CONFIG_HIBERNATION) += hibernate.o hibernate-asm.o
arm64-obj-$(CONFIG_KEXEC) += machine_kexec.o relocate_kernel.o \
cpu-reset.o
arm64-obj-$(CONFIG_ARM64_RELOC_TEST) += arm64-reloc-test.o
arm64-reloc-test-y := reloc_test_core.o reloc_test_syms.o
arm64-obj-$(CONFIG_CRASH_DUMP) += crash_dump.o
obj-y += $(arm64-obj-y) vdso/ probes/
obj-m += $(arm64-obj-m)

11
arch/arm64/kernel/alternative.c
View File

@ -105,11 +105,11 @@ static u32 get_alt_insn(struct alt_instr *alt, u32 *insnptr, u32 *altinsnptr)
return insn;
}
static void __apply_alternatives(void *alt_region)
static void __apply_alternatives(void *alt_region, bool use_linear_alias)
{
struct alt_instr *alt;
struct alt_region *region = alt_region;
u32 *origptr, *replptr;
u32 *origptr, *replptr, *updptr;
for (alt = region->begin; alt < region->end; alt++) {
u32 insn;
@ -124,11 +124,12 @@ static void __apply_alternatives(void *alt_region)
origptr = ALT_ORIG_PTR(alt);
replptr = ALT_REPL_PTR(alt);
updptr = use_linear_alias ? (u32 *)lm_alias(origptr) : origptr;
nr_inst = alt->alt_len / sizeof(insn);
for (i = 0; i < nr_inst; i++) {
insn = get_alt_insn(alt, origptr + i, replptr + i);
*(origptr + i) = cpu_to_le32(insn);
updptr[i] = cpu_to_le32(insn);
}
flush_icache_range((uintptr_t)origptr,
@ -155,7 +156,7 @@ static int __apply_alternatives_multi_stop(void *unused)
isb();
} else {
BUG_ON(patched);
__apply_alternatives(&region);
__apply_alternatives(&region, true);
/* Barriers provided by the cache flushing */
WRITE_ONCE(patched, 1);
}
@ -176,5 +177,5 @@ void apply_alternatives(void *start, size_t length)
.end = start + length,
};
__apply_alternatives(&region);
__apply_alternatives(&region, false);
}

38
arch/arm64/kernel/cacheinfo.c
View File

@ -17,15 +17,9 @@
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <linux/bitops.h>
#include <linux/cacheinfo.h>
#include <linux/cpu.h>
#include <linux/compiler.h>
#include <linux/of.h>
#include <asm/cachetype.h>
#include <asm/processor.h>
#define MAX_CACHE_LEVEL 7 /* Max 7 level supported */
/* Ctypen, bits[3(n - 1) + 2 : 3(n - 1)], for n = 1 to 7 */
#define CLIDR_CTYPE_SHIFT(level) (3 * (level - 1))
@ -43,43 +37,11 @@ static inline enum cache_type get_cache_type(int level)
return CLIDR_CTYPE(clidr, level);
}
/*
* Cache Size Selection Register(CSSELR) selects which Cache Size ID
* Register(CCSIDR) is accessible by specifying the required cache
* level and the cache type. We need to ensure that no one else changes
* CSSELR by calling this in non-preemtible context
*/
u64 __attribute_const__ cache_get_ccsidr(u64 csselr)
{
u64 ccsidr;
WARN_ON(preemptible());
write_sysreg(csselr, csselr_el1);
isb();
ccsidr = read_sysreg(ccsidr_el1);
return ccsidr;
}
static void ci_leaf_init(struct cacheinfo *this_leaf,
enum cache_type type, unsigned int level)
{
bool is_icache = type & CACHE_TYPE_INST;
u64 tmp = cache_get_ccsidr((level - 1) << 1 | is_icache);
this_leaf->level = level;
this_leaf->type = type;
this_leaf->coherency_line_size = CACHE_LINESIZE(tmp);
this_leaf->number_of_sets = CACHE_NUMSETS(tmp);
this_leaf->ways_of_associativity = CACHE_ASSOCIATIVITY(tmp);
this_leaf->size = this_leaf->number_of_sets *
this_leaf->coherency_line_size * this_leaf->ways_of_associativity;
this_leaf->attributes =
((tmp & CCSIDR_EL1_WRITE_THROUGH) ? CACHE_WRITE_THROUGH : 0) |
((tmp & CCSIDR_EL1_WRITE_BACK) ? CACHE_WRITE_BACK : 0) |
((tmp & CCSIDR_EL1_READ_ALLOCATE) ? CACHE_READ_ALLOCATE : 0) |
((tmp & CCSIDR_EL1_WRITE_ALLOCATE) ? CACHE_WRITE_ALLOCATE : 0);
}
static int __init_cache_level(unsigned int cpu)

30
arch/arm64/kernel/cpufeature.c
View File

@ -97,6 +97,13 @@ static const struct arm64_ftr_bits ftr_id_aa64isar0[] = {
ARM64_FTR_END,
};
static const struct arm64_ftr_bits ftr_id_aa64isar1[] = {
ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_EXACT, ID_AA64ISAR1_LRCPC_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_EXACT, ID_AA64ISAR1_FCMA_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_EXACT, ID_AA64ISAR1_JSCVT_SHIFT, 4, 0),
ARM64_FTR_END,
};
static const struct arm64_ftr_bits ftr_id_aa64pfr0[] = {
ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_EXACT, ID_AA64PFR0_GIC_SHIFT, 4, 0),
S_ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64PFR0_ASIMD_SHIFT, 4, ID_AA64PFR0_ASIMD_NI),
@ -153,9 +160,9 @@ static const struct arm64_ftr_bits ftr_ctr[] = {
/*
* Linux can handle differing I-cache policies. Userspace JITs will
* make use of *minLine.
* If we have differing I-cache policies, report it as the weakest - AIVIVT.
* If we have differing I-cache policies, report it as the weakest - VIPT.
*/
ARM64_FTR_BITS(FTR_VISIBLE, FTR_NONSTRICT, FTR_EXACT, 14, 2, ICACHE_POLICY_AIVIVT), /* L1Ip */
ARM64_FTR_BITS(FTR_VISIBLE, FTR_NONSTRICT, FTR_EXACT, 14, 2, ICACHE_POLICY_VIPT), /* L1Ip */
ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, 0, 4, 0), /* IminLine */
ARM64_FTR_END,
};
@ -314,7 +321,7 @@ static const struct __ftr_reg_entry {
/* Op1 = 0, CRn = 0, CRm = 6 */
ARM64_FTR_REG(SYS_ID_AA64ISAR0_EL1, ftr_id_aa64isar0),
ARM64_FTR_REG(SYS_ID_AA64ISAR1_EL1, ftr_raz),
ARM64_FTR_REG(SYS_ID_AA64ISAR1_EL1, ftr_id_aa64isar1),
/* Op1 = 0, CRn = 0, CRm = 7 */
ARM64_FTR_REG(SYS_ID_AA64MMFR0_EL1, ftr_id_aa64mmfr0),
@ -585,7 +592,7 @@ void update_cpu_features(int cpu,
* If we have AArch32, we care about 32-bit features for compat.
* If the system doesn't support AArch32, don't update them.
*/
if (id_aa64pfr0_32bit_el0(read_system_reg(SYS_ID_AA64PFR0_EL1)) &&
if (id_aa64pfr0_32bit_el0(read_sanitised_ftr_reg(SYS_ID_AA64PFR0_EL1)) &&
id_aa64pfr0_32bit_el0(info->reg_id_aa64pfr0)) {
taint |= check_update_ftr_reg(SYS_ID_DFR0_EL1, cpu,
@ -636,7 +643,7 @@ void update_cpu_features(int cpu,
"Unsupported CPU feature variation.\n");
}
u64 read_system_reg(u32 id)
u64 read_sanitised_ftr_reg(u32 id)
{
struct arm64_ftr_reg *regp = get_arm64_ftr_reg(id);
@ -649,10 +656,10 @@ u64 read_system_reg(u32 id)
case r: return read_sysreg_s(r)
/*
* __raw_read_system_reg() - Used by a STARTING cpu before cpuinfo is populated.
* __read_sysreg_by_encoding() - Used by a STARTING cpu before cpuinfo is populated.
* Read the system register on the current CPU
*/
static u64 __raw_read_system_reg(u32 sys_id)
static u64 __read_sysreg_by_encoding(u32 sys_id)
{
switch (sys_id) {
read_sysreg_case(SYS_ID_PFR0_EL1);
@ -709,9 +716,9 @@ has_cpuid_feature(const struct arm64_cpu_capabilities *entry, int scope)
WARN_ON(scope == SCOPE_LOCAL_CPU && preemptible());
if (scope == SCOPE_SYSTEM)
val = read_system_reg(entry->sys_reg);
val = read_sanitised_ftr_reg(entry->sys_reg);
else
val = __raw_read_system_reg(entry->sys_reg);
val = __read_sysreg_by_encoding(entry->sys_reg);
return feature_matches(val, entry);
}
@ -761,7 +768,7 @@ static bool hyp_offset_low(const struct arm64_cpu_capabilities *entry,
static bool has_no_fpsimd(const struct arm64_cpu_capabilities *entry, int __unused)
{
u64 pfr0 = read_system_reg(SYS_ID_AA64PFR0_EL1);
u64 pfr0 = read_sanitised_ftr_reg(SYS_ID_AA64PFR0_EL1);
return cpuid_feature_extract_signed_field(pfr0,
ID_AA64PFR0_FP_SHIFT) < 0;
@ -888,6 +895,9 @@ static const struct arm64_cpu_capabilities arm64_elf_hwcaps[] = {
HWCAP_CAP(SYS_ID_AA64PFR0_EL1, ID_AA64PFR0_FP_SHIFT, FTR_SIGNED, 1, CAP_HWCAP, HWCAP_FPHP),
HWCAP_CAP(SYS_ID_AA64PFR0_EL1, ID_AA64PFR0_ASIMD_SHIFT, FTR_SIGNED, 0, CAP_HWCAP, HWCAP_ASIMD),
HWCAP_CAP(SYS_ID_AA64PFR0_EL1, ID_AA64PFR0_ASIMD_SHIFT, FTR_SIGNED, 1, CAP_HWCAP, HWCAP_ASIMDHP),
HWCAP_CAP(SYS_ID_AA64ISAR1_EL1, ID_AA64ISAR1_JSCVT_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, HWCAP_JSCVT),
HWCAP_CAP(SYS_ID_AA64ISAR1_EL1, ID_AA64ISAR1_FCMA_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, HWCAP_FCMA),
HWCAP_CAP(SYS_ID_AA64ISAR1_EL1, ID_AA64ISAR1_LRCPC_SHIFT, FTR_UNSIGNED, 1, CAP_HWCAP, HWCAP_LRCPC),
{},
};

37
arch/arm64/kernel/cpuinfo.c
View File

@ -15,7 +15,7 @@
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <asm/arch_timer.h>
#include <asm/cachetype.h>
#include <asm/cache.h>
#include <asm/cpu.h>
#include <asm/cputype.h>
#include <asm/cpufeature.h>
@ -43,10 +43,10 @@ DEFINE_PER_CPU(struct cpuinfo_arm64, cpu_data);
static struct cpuinfo_arm64 boot_cpu_data;
static char *icache_policy_str[] = {
[ICACHE_POLICY_RESERVED] = "RESERVED/UNKNOWN",
[ICACHE_POLICY_AIVIVT] = "AIVIVT",
[ICACHE_POLICY_VIPT] = "VIPT",
[ICACHE_POLICY_PIPT] = "PIPT",
[0 ... ICACHE_POLICY_PIPT] = "RESERVED/UNKNOWN",
[ICACHE_POLICY_VIPT] = "VIPT",
[ICACHE_POLICY_PIPT] = "PIPT",
[ICACHE_POLICY_VPIPT] = "VPIPT",
};
unsigned long __icache_flags;
@ -65,6 +65,9 @@ static const char *const hwcap_str[] = {
"asimdhp",
"cpuid",
"asimdrdm",
"jscvt",
"fcma",
"lrcpc",
NULL
};
@ -289,20 +292,18 @@ static void cpuinfo_detect_icache_policy(struct cpuinfo_arm64 *info)
unsigned int cpu = smp_processor_id();
u32 l1ip = CTR_L1IP(info->reg_ctr);
if (l1ip != ICACHE_POLICY_PIPT) {
/*
* VIPT caches are non-aliasing if the VA always equals the PA
* in all bit positions that are covered by the index. This is
* the case if the size of a way (# of sets * line size) does
* not exceed PAGE_SIZE.
*/
u32 waysize = icache_get_numsets() * icache_get_linesize();
if (l1ip != ICACHE_POLICY_VIPT || waysize > PAGE_SIZE)
set_bit(ICACHEF_ALIASING, &__icache_flags);
switch (l1ip) {
case ICACHE_POLICY_PIPT:
break;
case ICACHE_POLICY_VPIPT:
set_bit(ICACHEF_VPIPT, &__icache_flags);
break;
default:
/* Fallthrough */
case ICACHE_POLICY_VIPT:
/* Assume aliasing */
set_bit(ICACHEF_ALIASING, &__icache_flags);
}
if (l1ip == ICACHE_POLICY_AIVIVT)
set_bit(ICACHEF_AIVIVT, &__icache_flags);
pr_info("Detected %s I-cache on CPU%d\n", icache_policy_str[l1ip], cpu);
}

71
arch/arm64/kernel/crash_dump.c Normal file
View File

@ -0,0 +1,71 @@
/*
* Routines for doing kexec-based kdump
*
* Copyright (C) 2017 Linaro Limited
* Author: AKASHI Takahiro <takahiro.akashi@linaro.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/crash_dump.h>
#include <linux/errno.h>
#include <linux/io.h>
#include <linux/memblock.h>
#include <linux/uaccess.h>
#include <asm/memory.h>
/**
* copy_oldmem_page() - copy one page from old kernel memory
* @pfn: page frame number to be copied
* @buf: buffer where the copied page is placed
* @csize: number of bytes to copy
* @offset: offset in bytes into the page
* @userbuf: if set, @buf is in a user address space
*
* This function copies one page from old kernel memory into buffer pointed by
* @buf. If @buf is in userspace, set @userbuf to %1. Returns number of bytes
* copied or negative error in case of failure.
*/
ssize_t copy_oldmem_page(unsigned long pfn, char *buf,
size_t csize, unsigned long offset,
int userbuf)
{
void *vaddr;
if (!csize)
return 0;
vaddr = memremap(__pfn_to_phys(pfn), PAGE_SIZE, MEMREMAP_WB);
if (!vaddr)
return -ENOMEM;
if (userbuf) {
if (copy_to_user((char __user *)buf, vaddr + offset, csize)) {
memunmap(vaddr);
return -EFAULT;
}
} else {
memcpy(buf, vaddr + offset, csize);
}
memunmap(vaddr);
return csize;
}
/**
* elfcorehdr_read - read from ELF core header
* @buf: buffer where the data is placed
* @csize: number of bytes to read
* @ppos: address in the memory
*
* This function reads @count bytes from elf core header which exists
* on crash dump kernel's memory.
*/
ssize_t elfcorehdr_read(char *buf, size_t count, u64 *ppos)
{
memcpy(buf, phys_to_virt((phys_addr_t)*ppos), count);
return count;
}

2
arch/arm64/kernel/debug-monitors.c
View File

@ -36,7 +36,7 @@
/* Determine debug architecture. */
u8 debug_monitors_arch(void)
{
return cpuid_feature_extract_unsigned_field(read_system_reg(SYS_ID_AA64DFR0_EL1),
return cpuid_feature_extract_unsigned_field(read_sanitised_ftr_reg(SYS_ID_AA64DFR0_EL1),
ID_AA64DFR0_DEBUGVER_SHIFT);
}

155
arch/arm64/kernel/efi-header.S Normal file
View File

@ -0,0 +1,155 @@
/*
* Copyright (C) 2013 - 2017 Linaro, Ltd.
* Copyright (C) 2013, 2014 Red Hat, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/pe.h>
#include <linux/sizes.h>
.macro __EFI_PE_HEADER
.long PE_MAGIC
coff_header:
.short IMAGE_FILE_MACHINE_ARM64 // Machine
.short section_count // NumberOfSections
.long 0 // TimeDateStamp
.long 0 // PointerToSymbolTable
.long 0 // NumberOfSymbols
.short section_table - optional_header // SizeOfOptionalHeader
.short IMAGE_FILE_DEBUG_STRIPPED | \
IMAGE_FILE_EXECUTABLE_IMAGE | \
IMAGE_FILE_LINE_NUMS_STRIPPED // Characteristics
optional_header:
.short PE_OPT_MAGIC_PE32PLUS // PE32+ format
.byte 0x02 // MajorLinkerVersion
.byte 0x14 // MinorLinkerVersion
.long __initdata_begin - efi_header_end // SizeOfCode
.long __pecoff_data_size // SizeOfInitializedData
.long 0 // SizeOfUninitializedData
.long __efistub_entry - _head // AddressOfEntryPoint
.long efi_header_end - _head // BaseOfCode
extra_header_fields:
.quad 0 // ImageBase
.long SZ_4K // SectionAlignment
.long PECOFF_FILE_ALIGNMENT // FileAlignment
.short 0 // MajorOperatingSystemVersion
.short 0 // MinorOperatingSystemVersion
.short 0 // MajorImageVersion
.short 0 // MinorImageVersion
.short 0 // MajorSubsystemVersion
.short 0 // MinorSubsystemVersion
.long 0 // Win32VersionValue
.long _end - _head // SizeOfImage
// Everything before the kernel image is considered part of the header
.long efi_header_end - _head // SizeOfHeaders
.long 0 // CheckSum
.short IMAGE_SUBSYSTEM_EFI_APPLICATION // Subsystem
.short 0 // DllCharacteristics
.quad 0 // SizeOfStackReserve
.quad 0 // SizeOfStackCommit
.quad 0 // SizeOfHeapReserve
.quad 0 // SizeOfHeapCommit
.long 0 // LoaderFlags
.long (section_table - .) / 8 // NumberOfRvaAndSizes
.quad 0 // ExportTable
.quad 0 // ImportTable
.quad 0 // ResourceTable
.quad 0 // ExceptionTable
.quad 0 // CertificationTable
.quad 0 // BaseRelocationTable
#ifdef CONFIG_DEBUG_EFI
.long efi_debug_table - _head // DebugTable
.long efi_debug_table_size
#endif
// Section table
section_table:
.ascii ".text\0\0\0"
.long __initdata_begin - efi_header_end // VirtualSize
.long efi_header_end - _head // VirtualAddress
.long __initdata_begin - efi_header_end // SizeOfRawData
.long efi_header_end - _head // PointerToRawData
.long 0 // PointerToRelocations
.long 0 // PointerToLineNumbers
.short 0 // NumberOfRelocations
.short 0 // NumberOfLineNumbers
.long IMAGE_SCN_CNT_CODE | \
IMAGE_SCN_MEM_READ | \
IMAGE_SCN_MEM_EXECUTE // Characteristics
.ascii ".data\0\0\0"
.long __pecoff_data_size // VirtualSize
.long __initdata_begin - _head // VirtualAddress
.long __pecoff_data_rawsize // SizeOfRawData
.long __initdata_begin - _head // PointerToRawData
.long 0 // PointerToRelocations
.long 0 // PointerToLineNumbers
.short 0 // NumberOfRelocations
.short 0 // NumberOfLineNumbers
.long IMAGE_SCN_CNT_INITIALIZED_DATA | \
IMAGE_SCN_MEM_READ | \
IMAGE_SCN_MEM_WRITE // Characteristics
.set section_count, (. - section_table) / 40
#ifdef CONFIG_DEBUG_EFI
/*
* The debug table is referenced via its Relative Virtual Address (RVA),
* which is only defined for those parts of the image that are covered
* by a section declaration. Since this header is not covered by any
* section, the debug table must be emitted elsewhere. So stick it in
* the .init.rodata section instead.
*
* Note that the EFI debug entry itself may legally have a zero RVA,
* which means we can simply put it right after the section headers.
*/
__INITRODATA
.align 2
efi_debug_table:
// EFI_IMAGE_DEBUG_DIRECTORY_ENTRY
.long 0 // Characteristics
.long 0 // TimeDateStamp
.short 0 // MajorVersion
.short 0 // MinorVersion
.long IMAGE_DEBUG_TYPE_CODEVIEW // Type
.long efi_debug_entry_size // SizeOfData
.long 0 // RVA
.long efi_debug_entry - _head // FileOffset
.set efi_debug_table_size, . - efi_debug_table
.previous
efi_debug_entry:
// EFI_IMAGE_DEBUG_CODEVIEW_NB10_ENTRY
.ascii "NB10" // Signature
.long 0 // Unknown
.long 0 // Unknown2
.long 0 // Unknown3
.asciz VMLINUX_PATH
.set efi_debug_entry_size, . - efi_debug_entry
#endif
/*
* EFI will load .text onwards at the 4k section alignment
* described in the PE/COFF header. To ensure that instruction
* sequences using an adrp and a :lo12: immediate will function
* correctly at this alignment, we must ensure that .text is
* placed at a 4k boundary in the Image to begin with.
*/
.align 12
efi_header_end:
.endm

222
arch/arm64/kernel/head.S
View File

@ -42,6 +42,8 @@
#include <asm/thread_info.h>
#include <asm/virt.h>
#include "efi-header.S"
#define __PHYS_OFFSET (KERNEL_START - TEXT_OFFSET)
#if (TEXT_OFFSET & 0xfff) != 0
@ -89,166 +91,14 @@ _head:
.quad 0 // reserved
.quad 0 // reserved
.quad 0 // reserved
.byte 0x41 // Magic number, "ARM\x64"
.byte 0x52
.byte 0x4d
.byte 0x64
.ascii "ARM\x64" // Magic number
#ifdef CONFIG_EFI
.long pe_header - _head // Offset to the PE header.
#else
.word 0 // reserved
#endif
#ifdef CONFIG_EFI
.align 3
pe_header:
.ascii "PE"
.short 0
coff_header:
.short 0xaa64 // AArch64
.short 2 // nr_sections
.long 0 // TimeDateStamp
.long 0 // PointerToSymbolTable
.long 1 // NumberOfSymbols
.short section_table - optional_header // SizeOfOptionalHeader
.short 0x206 // Characteristics.
// IMAGE_FILE_DEBUG_STRIPPED |
// IMAGE_FILE_EXECUTABLE_IMAGE |
// IMAGE_FILE_LINE_NUMS_STRIPPED
optional_header:
.short 0x20b // PE32+ format
.byte 0x02 // MajorLinkerVersion
.byte 0x14 // MinorLinkerVersion
.long _end - efi_header_end // SizeOfCode
.long 0 // SizeOfInitializedData
.long 0 // SizeOfUninitializedData
.long __efistub_entry - _head // AddressOfEntryPoint
.long efi_header_end - _head // BaseOfCode
extra_header_fields:
.quad 0 // ImageBase
.long 0x1000 // SectionAlignment
.long PECOFF_FILE_ALIGNMENT // FileAlignment
.short 0 // MajorOperatingSystemVersion
.short 0 // MinorOperatingSystemVersion
.short 0 // MajorImageVersion
.short 0 // MinorImageVersion
.short 0 // MajorSubsystemVersion
.short 0 // MinorSubsystemVersion
.long 0 // Win32VersionValue
.long _end - _head // SizeOfImage
// Everything before the kernel image is considered part of the header
.long efi_header_end - _head // SizeOfHeaders
.long 0 // CheckSum
.short 0xa // Subsystem (EFI application)
.short 0 // DllCharacteristics
.quad 0 // SizeOfStackReserve
.quad 0 // SizeOfStackCommit
.quad 0 // SizeOfHeapReserve
.quad 0 // SizeOfHeapCommit
.long 0 // LoaderFlags
.long (section_table - .) / 8 // NumberOfRvaAndSizes
.quad 0 // ExportTable
.quad 0 // ImportTable
.quad 0 // ResourceTable
.quad 0 // ExceptionTable
.quad 0 // CertificationTable
.quad 0 // BaseRelocationTable
#ifdef CONFIG_DEBUG_EFI
.long efi_debug_table - _head // DebugTable
.long efi_debug_table_size
#endif
// Section table
section_table:
/*
* The EFI application loader requires a relocation section
* because EFI applications must be relocatable. This is a
* dummy section as far as we are concerned.
*/
.ascii ".reloc"
.byte 0
.byte 0 // end of 0 padding of section name
.long 0
.long 0
.long 0 // SizeOfRawData
.long 0 // PointerToRawData
.long 0 // PointerToRelocations
.long 0 // PointerToLineNumbers
.short 0 // NumberOfRelocations
.short 0 // NumberOfLineNumbers
.long 0x42100040 // Characteristics (section flags)
.ascii ".text"
.byte 0
.byte 0
.byte 0 // end of 0 padding of section name
.long _end - efi_header_end // VirtualSize
.long efi_header_end - _head // VirtualAddress
.long _edata - efi_header_end // SizeOfRawData
.long efi_header_end - _head // PointerToRawData
.long 0 // PointerToRelocations (0 for executables)
.long 0 // PointerToLineNumbers (0 for executables)
.short 0 // NumberOfRelocations (0 for executables)
.short 0 // NumberOfLineNumbers (0 for executables)
.long 0xe0500020 // Characteristics (section flags)
#ifdef CONFIG_DEBUG_EFI
/*
* The debug table is referenced via its Relative Virtual Address (RVA),
* which is only defined for those parts of the image that are covered
* by a section declaration. Since this header is not covered by any
* section, the debug table must be emitted elsewhere. So stick it in
* the .init.rodata section instead.
*
* Note that the EFI debug entry itself may legally have a zero RVA,
* which means we can simply put it right after the section headers.
*/
__INITRODATA
.align 2
efi_debug_table:
// EFI_IMAGE_DEBUG_DIRECTORY_ENTRY
.long 0 // Characteristics
.long 0 // TimeDateStamp
.short 0 // MajorVersion
.short 0 // MinorVersion
.long 2 // Type == EFI_IMAGE_DEBUG_TYPE_CODEVIEW
.long efi_debug_entry_size // SizeOfData
.long 0 // RVA
.long efi_debug_entry - _head // FileOffset
.set efi_debug_table_size, . - efi_debug_table
.previous
efi_debug_entry:
// EFI_IMAGE_DEBUG_CODEVIEW_NB10_ENTRY
.ascii "NB10" // Signature
.long 0 // Unknown
.long 0 // Unknown2
.long 0 // Unknown3
.asciz VMLINUX_PATH
.set efi_debug_entry_size, . - efi_debug_entry
#endif
/*
* EFI will load .text onwards at the 4k section alignment
* described in the PE/COFF header. To ensure that instruction
* sequences using an adrp and a :lo12: immediate will function
* correctly at this alignment, we must ensure that .text is
* placed at a 4k boundary in the Image to begin with.
*/
.align 12
efi_header_end:
__EFI_PE_HEADER
#else
.long 0 // reserved
#endif
__INIT
@ -534,13 +384,8 @@ ENTRY(kimage_vaddr)
ENTRY(el2_setup)
mrs x0, CurrentEL
cmp x0, #CurrentEL_EL2
b.ne 1f
mrs x0, sctlr_el2
CPU_BE( orr x0, x0, #(1 << 25) ) // Set the EE bit for EL2
CPU_LE( bic x0, x0, #(1 << 25) ) // Clear the EE bit for EL2
msr sctlr_el2, x0
b 2f
1: mrs x0, sctlr_el1
b.eq 1f
mrs x0, sctlr_el1
CPU_BE( orr x0, x0, #(3 << 24) ) // Set the EE and E0E bits for EL1
CPU_LE( bic x0, x0, #(3 << 24) ) // Clear the EE and E0E bits for EL1
msr sctlr_el1, x0
@ -548,7 +393,11 @@ CPU_LE( bic x0, x0, #(3 << 24) ) // Clear the EE and E0E bits for EL1
isb
ret
2:
1: mrs x0, sctlr_el2
CPU_BE( orr x0, x0, #(1 << 25) ) // Set the EE bit for EL2
CPU_LE( bic x0, x0, #(1 << 25) ) // Clear the EE bit for EL2
msr sctlr_el2, x0
#ifdef CONFIG_ARM64_VHE
/*
* Check for VHE being present. For the rest of the EL2 setup,
@ -594,14 +443,14 @@ set_hcr:
cmp x0, #1
b.ne 3f
mrs_s x0, ICC_SRE_EL2
mrs_s x0, SYS_ICC_SRE_EL2
orr x0, x0, #ICC_SRE_EL2_SRE // Set ICC_SRE_EL2.SRE==1
orr x0, x0, #ICC_SRE_EL2_ENABLE // Set ICC_SRE_EL2.Enable==1
msr_s ICC_SRE_EL2, x0
msr_s SYS_ICC_SRE_EL2, x0
isb // Make sure SRE is now set
mrs_s x0, ICC_SRE_EL2 // Read SRE back,
mrs_s x0, SYS_ICC_SRE_EL2 // Read SRE back,
tbz x0, #0, 3f // and check that it sticks
msr_s ICH_HCR_EL2, xzr // Reset ICC_HCR_EL2 to defaults
msr_s SYS_ICH_HCR_EL2, xzr // Reset ICC_HCR_EL2 to defaults
3:
#endif
@ -612,26 +461,6 @@ set_hcr:
msr vpidr_el2, x0
msr vmpidr_el2, x1
/*
* When VHE is not in use, early init of EL2 and EL1 needs to be
* done here.
* When VHE _is_ in use, EL1 will not be used in the host and
* requires no configuration, and all non-hyp-specific EL2 setup
* will be done via the _EL1 system register aliases in __cpu_setup.
*/
cbnz x2, 1f
/* sctlr_el1 */
mov x0, #0x0800 // Set/clear RES{1,0} bits
CPU_BE( movk x0, #0x33d0, lsl #16 ) // Set EE and E0E on BE systems
CPU_LE( movk x0, #0x30d0, lsl #16 ) // Clear EE and E0E on LE systems
msr sctlr_el1, x0
/* Coprocessor traps. */
mov x0, #0x33ff
msr cptr_el2, x0 // Disable copro. traps to EL2
1:
#ifdef CONFIG_COMPAT
msr hstr_el2, xzr // Disable CP15 traps to EL2
#endif
@ -668,6 +497,23 @@ CPU_LE( movk x0, #0x30d0, lsl #16 ) // Clear EE and E0E on LE systems
ret
install_el2_stub:
/*
* When VHE is not in use, early init of EL2 and EL1 needs to be
* done here.
* When VHE _is_ in use, EL1 will not be used in the host and
* requires no configuration, and all non-hyp-specific EL2 setup
* will be done via the _EL1 system register aliases in __cpu_setup.
*/
/* sctlr_el1 */
mov x0, #0x0800 // Set/clear RES{1,0} bits
CPU_BE( movk x0, #0x33d0, lsl #16 ) // Set EE and E0E on BE systems
CPU_LE( movk x0, #0x30d0, lsl #16 ) // Clear EE and E0E on LE systems
msr sctlr_el1, x0
/* Coprocessor traps. */
mov x0, #0x33ff
msr cptr_el2, x0 // Disable copro. traps to EL2
/* Hypervisor stub */
adr_l x0, __hyp_stub_vectors
msr vbar_el2, x0

10
arch/arm64/kernel/hibernate.c
View File

@ -28,6 +28,7 @@
#include <asm/cacheflush.h>
#include <asm/cputype.h>
#include <asm/irqflags.h>
#include <asm/kexec.h>
#include <asm/memory.h>
#include <asm/mmu_context.h>
#include <asm/pgalloc.h>
@ -102,7 +103,8 @@ int pfn_is_nosave(unsigned long pfn)
unsigned long nosave_begin_pfn = sym_to_pfn(&__nosave_begin);
unsigned long nosave_end_pfn = sym_to_pfn(&__nosave_end - 1);
return (pfn >= nosave_begin_pfn) && (pfn <= nosave_end_pfn);
return ((pfn >= nosave_begin_pfn) && (pfn <= nosave_end_pfn)) ||
crash_is_nosave(pfn);
}
void notrace save_processor_state(void)
@ -286,6 +288,9 @@ int swsusp_arch_suspend(void)
local_dbg_save(flags);
if (__cpu_suspend_enter(&state)) {
/* make the crash dump kernel image visible/saveable */
crash_prepare_suspend();
sleep_cpu = smp_processor_id();
ret = swsusp_save();
} else {
@ -297,6 +302,9 @@ int swsusp_arch_suspend(void)
if (el2_reset_needed())
dcache_clean_range(__hyp_idmap_text_start, __hyp_idmap_text_end);
/* make the crash dump kernel image protected again */
crash_post_resume();
/*
* Tell the hibernation core that we've just restored
* the memory

170
arch/arm64/kernel/machine_kexec.c
View File

@ -9,12 +9,19 @@
* published by the Free Software Foundation.
*/
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/kernel.h>
#include <linux/kexec.h>
#include <linux/page-flags.h>
#include <linux/smp.h>
#include <asm/cacheflush.h>
#include <asm/cpu_ops.h>
#include <asm/memory.h>
#include <asm/mmu.h>
#include <asm/mmu_context.h>
#include <asm/page.h>
#include "cpu-reset.h"
@ -22,8 +29,6 @@
extern const unsigned char arm64_relocate_new_kernel[];
extern const unsigned long arm64_relocate_new_kernel_size;
static unsigned long kimage_start;
/**
* kexec_image_info - For debugging output.
*/
@ -64,8 +69,6 @@ void machine_kexec_cleanup(struct kimage *kimage)
*/
int machine_kexec_prepare(struct kimage *kimage)
{
kimage_start = kimage->start;
kexec_image_info(kimage);
if (kimage->type != KEXEC_TYPE_CRASH && cpus_are_stuck_in_kernel()) {
@ -144,11 +147,15 @@ void machine_kexec(struct kimage *kimage)
{
phys_addr_t reboot_code_buffer_phys;
void *reboot_code_buffer;
bool in_kexec_crash = (kimage == kexec_crash_image);
bool stuck_cpus = cpus_are_stuck_in_kernel();
/*
* New cpus may have become stuck_in_kernel after we loaded the image.
*/
BUG_ON(cpus_are_stuck_in_kernel() || (num_online_cpus() > 1));
BUG_ON(!in_kexec_crash && (stuck_cpus || (num_online_cpus() > 1)));
WARN(in_kexec_crash && (stuck_cpus || smp_crash_stop_failed()),
"Some CPUs may be stale, kdump will be unreliable.\n");
reboot_code_buffer_phys = page_to_phys(kimage->control_code_page);
reboot_code_buffer = phys_to_virt(reboot_code_buffer_phys);
@ -183,7 +190,7 @@ void machine_kexec(struct kimage *kimage)
kexec_list_flush(kimage);
/* Flush the new image if already in place. */
if (kimage->head & IND_DONE)
if ((kimage != kexec_crash_image) && (kimage->head & IND_DONE))
kexec_segment_flush(kimage);
pr_info("Bye!\n");
@ -200,13 +207,158 @@ void machine_kexec(struct kimage *kimage)
* relocation is complete.
*/
cpu_soft_restart(1, reboot_code_buffer_phys, kimage->head,
kimage_start, 0);
cpu_soft_restart(kimage != kexec_crash_image,
reboot_code_buffer_phys, kimage->head, kimage->start, 0);
BUG(); /* Should never get here. */
}
static void machine_kexec_mask_interrupts(void)
{
unsigned int i;
struct irq_desc *desc;
for_each_irq_desc(i, desc) {
struct irq_chip *chip;
int ret;
chip = irq_desc_get_chip(desc);
if (!chip)
continue;
/*
* First try to remove the active state. If this
* fails, try to EOI the interrupt.
*/
ret = irq_set_irqchip_state(i, IRQCHIP_STATE_ACTIVE, false);
if (ret && irqd_irq_inprogress(&desc->irq_data) &&
chip->irq_eoi)
chip->irq_eoi(&desc->irq_data);
if (chip->irq_mask)
chip->irq_mask(&desc->irq_data);
if (chip->irq_disable && !irqd_irq_disabled(&desc->irq_data))
chip->irq_disable(&desc->irq_data);
}
}
/**
* machine_crash_shutdown - shutdown non-crashing cpus and save registers
*/
void machine_crash_shutdown(struct pt_regs *regs)
{
/* Empty routine needed to avoid build errors. */
local_irq_disable();
/* shutdown non-crashing cpus */
smp_send_crash_stop();
/* for crashing cpu */
crash_save_cpu(regs, smp_processor_id());
machine_kexec_mask_interrupts();
pr_info("Starting crashdump kernel...\n");
}
void arch_kexec_protect_crashkres(void)
{
int i;
kexec_segment_flush(kexec_crash_image);
for (i = 0; i < kexec_crash_image->nr_segments; i++)
set_memory_valid(
__phys_to_virt(kexec_crash_image->segment[i].mem),
kexec_crash_image->segment[i].memsz >> PAGE_SHIFT, 0);
}
void arch_kexec_unprotect_crashkres(void)
{
int i;
for (i = 0; i < kexec_crash_image->nr_segments; i++)
set_memory_valid(
__phys_to_virt(kexec_crash_image->segment[i].mem),
kexec_crash_image->segment[i].memsz >> PAGE_SHIFT, 1);
}
#ifdef CONFIG_HIBERNATION
/*
* To preserve the crash dump kernel image, the relevant memory segments
* should be mapped again around the hibernation.
*/
void crash_prepare_suspend(void)
{
if (kexec_crash_image)
arch_kexec_unprotect_crashkres();
}
void crash_post_resume(void)
{
if (kexec_crash_image)
arch_kexec_protect_crashkres();
}
/*
* crash_is_nosave
*
* Return true only if a page is part of reserved memory for crash dump kernel,
* but does not hold any data of loaded kernel image.
*
* Note that all the pages in crash dump kernel memory have been initially
* marked as Reserved in kexec_reserve_crashkres_pages().
*
* In hibernation, the pages which are Reserved and yet "nosave" are excluded
* from the hibernation iamge. crash_is_nosave() does thich check for crash
* dump kernel and will reduce the total size of hibernation image.
*/
bool crash_is_nosave(unsigned long pfn)
{
int i;
phys_addr_t addr;
if (!crashk_res.end)
return false;
/* in reserved memory? */
addr = __pfn_to_phys(pfn);
if ((addr < crashk_res.start) || (crashk_res.end < addr))
return false;
if (!kexec_crash_image)
return true;
/* not part of loaded kernel image? */
for (i = 0; i < kexec_crash_image->nr_segments; i++)
if (addr >= kexec_crash_image->segment[i].mem &&
addr < (kexec_crash_image->segment[i].mem +
kexec_crash_image->segment[i].memsz))
return false;
return true;
}
void crash_free_reserved_phys_range(unsigned long begin, unsigned long end)
{
unsigned long addr;
struct page *page;
for (addr = begin; addr < end; addr += PAGE_SIZE) {
page = phys_to_page(addr);
ClearPageReserved(page);
free_reserved_page(page);
}
}
#endif /* CONFIG_HIBERNATION */
void arch_crash_save_vmcoreinfo(void)
{
VMCOREINFO_NUMBER(VA_BITS);
/* Please note VMCOREINFO_NUMBER() uses "%d", not "%x" */
vmcoreinfo_append_str("NUMBER(kimage_voffset)=0x%llx\n",
kimage_voffset);
vmcoreinfo_append_str("NUMBER(PHYS_OFFSET)=0x%llx\n",
PHYS_OFFSET);
}

108
arch/arm64/kernel/module-plts.c
View File

@ -1,5 +1,5 @@
/*
* Copyright (C) 2014-2016 Linaro Ltd. <ard.biesheuvel@linaro.org>
* Copyright (C) 2014-2017 Linaro Ltd. <ard.biesheuvel@linaro.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
@ -26,34 +26,20 @@ struct plt_entry {
__le32 br; /* br x16 */
};
u64 module_emit_plt_entry(struct module *mod, const Elf64_Rela *rela,
static bool in_init(const struct module *mod, void *loc)
{
return (u64)loc - (u64)mod->init_layout.base < mod->init_layout.size;
}
u64 module_emit_plt_entry(struct module *mod, void *loc, const Elf64_Rela *rela,
Elf64_Sym *sym)
{
struct plt_entry *plt = (struct plt_entry *)mod->arch.plt->sh_addr;
int i = mod->arch.plt_num_entries;
struct mod_plt_sec *pltsec = !in_init(mod, loc) ? &mod->arch.core :
&mod->arch.init;
struct plt_entry *plt = (struct plt_entry *)pltsec->plt->sh_addr;
int i = pltsec->plt_num_entries;
u64 val = sym->st_value + rela->r_addend;
/*
* We only emit PLT entries against undefined (SHN_UNDEF) symbols,
* which are listed in the ELF symtab section, but without a type
* or a size.
* So, similar to how the module loader uses the Elf64_Sym::st_value
* field to store the resolved addresses of undefined symbols, let's
* borrow the Elf64_Sym::st_size field (whose value is never used by
* the module loader, even for symbols that are defined) to record
* the address of a symbol's associated PLT entry as we emit it for a
* zero addend relocation (which is the only kind we have to deal with
* in practice). This allows us to find duplicates without having to
* go through the table every time.
*/
if (rela->r_addend == 0 && sym->st_size != 0) {
BUG_ON(sym->st_size < (u64)plt || sym->st_size >= (u64)&plt[i]);
return sym->st_size;
}
mod->arch.plt_num_entries++;
BUG_ON(mod->arch.plt_num_entries > mod->arch.plt_max_entries);
/*
* MOVK/MOVN/MOVZ opcode:
* +--------+------------+--------+-----------+-------------+---------+
@ -72,8 +58,19 @@ u64 module_emit_plt_entry(struct module *mod, const Elf64_Rela *rela,
cpu_to_le32(0xd61f0200)
};
if (rela->r_addend == 0)
sym->st_size = (u64)&plt[i];
/*
* Check if the entry we just created is a duplicate. Given that the
* relocations are sorted, this will be the last entry we allocated.
* (if one exists).
*/
if (i > 0 &&
plt[i].mov0 == plt[i - 1].mov0 &&
plt[i].mov1 == plt[i - 1].mov1 &&
plt[i].mov2 == plt[i - 1].mov2)
return (u64)&plt[i - 1];
pltsec->plt_num_entries++;
BUG_ON(pltsec->plt_num_entries > pltsec->plt_max_entries);
return (u64)&plt[i];
}
@ -104,7 +101,8 @@ static bool duplicate_rel(const Elf64_Rela *rela, int num)
return num > 0 && cmp_rela(rela + num, rela + num - 1) == 0;
}
static unsigned int count_plts(Elf64_Sym *syms, Elf64_Rela *rela, int num)
static unsigned int count_plts(Elf64_Sym *syms, Elf64_Rela *rela, int num,
Elf64_Word dstidx)
{
unsigned int ret = 0;
Elf64_Sym *s;
@ -116,13 +114,17 @@ static unsigned int count_plts(Elf64_Sym *syms, Elf64_Rela *rela, int num)
case R_AARCH64_CALL26:
/*
* We only have to consider branch targets that resolve
* to undefined symbols. This is not simply a heuristic,
* it is a fundamental limitation, since the PLT itself
* is part of the module, and needs to be within 128 MB
* as well, so modules can never grow beyond that limit.
* to symbols that are defined in a different section.
* This is not simply a heuristic, it is a fundamental
* limitation, since there is no guaranteed way to emit
* PLT entries sufficiently close to the branch if the
* section size exceeds the range of a branch
* instruction. So ignore relocations against defined
* symbols if they live in the same section as the
* relocation target.
*/
s = syms + ELF64_R_SYM(rela[i].r_info);
if (s->st_shndx != SHN_UNDEF)
if (s->st_shndx == dstidx)
break;
/*
@ -149,7 +151,8 @@ static unsigned int count_plts(Elf64_Sym *syms, Elf64_Rela *rela, int num)
int module_frob_arch_sections(Elf_Ehdr *ehdr, Elf_Shdr *sechdrs,
char *secstrings, struct module *mod)
{
unsigned long plt_max_entries = 0;
unsigned long core_plts = 0;
unsigned long init_plts = 0;
Elf64_Sym *syms = NULL;
int i;
@ -158,14 +161,16 @@ int module_frob_arch_sections(Elf_Ehdr *ehdr, Elf_Shdr *sechdrs,
* entries. Record the symtab address as well.
*/
for (i = 0; i < ehdr->e_shnum; i++) {
if (strcmp(".plt", secstrings + sechdrs[i].sh_name) == 0)
mod->arch.plt = sechdrs + i;
if (!strcmp(secstrings + sechdrs[i].sh_name, ".plt"))
mod->arch.core.plt = sechdrs + i;
else if (!strcmp(secstrings + sechdrs[i].sh_name, ".init.plt"))
mod->arch.init.plt = sechdrs + i;
else if (sechdrs[i].sh_type == SHT_SYMTAB)
syms = (Elf64_Sym *)sechdrs[i].sh_addr;
}
if (!mod->arch.plt) {
pr_err("%s: module PLT section missing\n", mod->name);
if (!mod->arch.core.plt || !mod->arch.init.plt) {
pr_err("%s: module PLT section(s) missing\n", mod->name);
return -ENOEXEC;
}
if (!syms) {
@ -188,14 +193,27 @@ int module_frob_arch_sections(Elf_Ehdr *ehdr, Elf_Shdr *sechdrs,
/* sort by type, symbol index and addend */
sort(rels, numrels, sizeof(Elf64_Rela), cmp_rela, NULL);
plt_max_entries += count_plts(syms, rels, numrels);
if (strncmp(secstrings + dstsec->sh_name, ".init", 5) != 0)
core_plts += count_plts(syms, rels, numrels,
sechdrs[i].sh_info);
else
init_plts += count_plts(syms, rels, numrels,
sechdrs[i].sh_info);
}
mod->arch.plt->sh_type = SHT_NOBITS;
mod->arch.plt->sh_flags = SHF_EXECINSTR | SHF_ALLOC;
mod->arch.plt->sh_addralign = L1_CACHE_BYTES;
mod->arch.plt->sh_size = plt_max_entries * sizeof(struct plt_entry);
mod->arch.plt_num_entries = 0;
mod->arch.plt_max_entries = plt_max_entries;
mod->arch.core.plt->sh_type = SHT_NOBITS;
mod->arch.core.plt->sh_flags = SHF_EXECINSTR | SHF_ALLOC;
mod->arch.core.plt->sh_addralign = L1_CACHE_BYTES;
mod->arch.core.plt->sh_size = (core_plts + 1) * sizeof(struct plt_entry);
mod->arch.core.plt_num_entries = 0;
mod->arch.core.plt_max_entries = core_plts;
mod->arch.init.plt->sh_type = SHT_NOBITS;
mod->arch.init.plt->sh_flags = SHF_EXECINSTR | SHF_ALLOC;
mod->arch.init.plt->sh_addralign = L1_CACHE_BYTES;
mod->arch.init.plt->sh_size = (init_plts + 1) * sizeof(struct plt_entry);
mod->arch.init.plt_num_entries = 0;
mod->arch.init.plt_max_entries = init_plts;
return 0;
}

2
arch/arm64/kernel/module.c
View File

@ -380,7 +380,7 @@ int apply_relocate_add(Elf64_Shdr *sechdrs,
if (IS_ENABLED(CONFIG_ARM64_MODULE_PLTS) &&
ovf == -ERANGE) {
val = module_emit_plt_entry(me, &rel[i], sym);
val = module_emit_plt_entry(me, loc, &rel[i], sym);
ovf = reloc_insn_imm(RELOC_OP_PREL, loc, val, 2,
26, AARCH64_INSN_IMM_26);
}

1
arch/arm64/kernel/module.lds
View File

@ -1,3 +1,4 @@
SECTIONS {
.plt (NOLOAD) : { BYTE(0) }
.init.plt (NOLOAD) : { BYTE(0) }
}

120
arch/arm64/kernel/perf_event.c
View File

@ -290,6 +290,12 @@ static const unsigned armv8_a53_perf_cache_map[PERF_COUNT_HW_CACHE_MAX]
[C(L1I)][C(OP_READ)][C(RESULT_ACCESS)] = ARMV8_PMUV3_PERFCTR_L1I_CACHE,
[C(L1I)][C(OP_READ)][C(RESULT_MISS)] = ARMV8_PMUV3_PERFCTR_L1I_CACHE_REFILL,
[C(LL)][C(OP_READ)][C(RESULT_ACCESS)] = ARMV8_PMUV3_PERFCTR_L2D_CACHE,
[C(LL)][C(OP_READ)][C(RESULT_MISS)] = ARMV8_PMUV3_PERFCTR_L2D_CACHE_REFILL,
[C(LL)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV8_PMUV3_PERFCTR_L2D_CACHE,
[C(LL)][C(OP_WRITE)][C(RESULT_MISS)] = ARMV8_PMUV3_PERFCTR_L2D_CACHE_REFILL,
[C(DTLB)][C(OP_READ)][C(RESULT_MISS)] = ARMV8_PMUV3_PERFCTR_L1D_TLB_REFILL,
[C(ITLB)][C(OP_READ)][C(RESULT_MISS)] = ARMV8_PMUV3_PERFCTR_L1I_TLB_REFILL,
[C(BPU)][C(OP_READ)][C(RESULT_ACCESS)] = ARMV8_PMUV3_PERFCTR_BR_PRED,
@ -957,10 +963,26 @@ static int armv8_vulcan_map_event(struct perf_event *event)
ARMV8_PMU_EVTYPE_EVENT);
}
struct armv8pmu_probe_info {
struct arm_pmu *pmu;
bool present;
};
static void __armv8pmu_probe_pmu(void *info)
{
struct arm_pmu *cpu_pmu = info;
struct armv8pmu_probe_info *probe = info;
struct arm_pmu *cpu_pmu = probe->pmu;
u64 dfr0;
u32 pmceid[2];
int pmuver;
dfr0 = read_sysreg(id_aa64dfr0_el1);
pmuver = cpuid_feature_extract_signed_field(dfr0,
ID_AA64DFR0_PMUVER_SHIFT);
if (pmuver < 1)
return;
probe->present = true;
/* Read the nb of CNTx counters supported from PMNC */
cpu_pmu->num_events = (armv8pmu_pmcr_read() >> ARMV8_PMU_PMCR_N_SHIFT)
@ -979,13 +1001,27 @@ static void __armv8pmu_probe_pmu(void *info)
static int armv8pmu_probe_pmu(struct arm_pmu *cpu_pmu)
{
return smp_call_function_any(&cpu_pmu->supported_cpus,
struct armv8pmu_probe_info probe = {
.pmu = cpu_pmu,
.present = false,
};
int ret;
ret = smp_call_function_any(&cpu_pmu->supported_cpus,
__armv8pmu_probe_pmu,
cpu_pmu, 1);
&probe, 1);
if (ret)
return ret;
return probe.present ? 0 : -ENODEV;
}
static void armv8_pmu_init(struct arm_pmu *cpu_pmu)
static int armv8_pmu_init(struct arm_pmu *cpu_pmu)
{
int ret = armv8pmu_probe_pmu(cpu_pmu);
if (ret)
return ret;
cpu_pmu->handle_irq = armv8pmu_handle_irq,
cpu_pmu->enable = armv8pmu_enable_event,
cpu_pmu->disable = armv8pmu_disable_event,
@ -997,78 +1033,104 @@ static void armv8_pmu_init(struct arm_pmu *cpu_pmu)
cpu_pmu->reset = armv8pmu_reset,
cpu_pmu->max_period = (1LLU << 32) - 1,
cpu_pmu->set_event_filter = armv8pmu_set_event_filter;
return 0;
}
static int armv8_pmuv3_init(struct arm_pmu *cpu_pmu)
{
armv8_pmu_init(cpu_pmu);
int ret = armv8_pmu_init(cpu_pmu);
if (ret)
return ret;
cpu_pmu->name = "armv8_pmuv3";
cpu_pmu->map_event = armv8_pmuv3_map_event;
cpu_pmu->attr_groups[ARMPMU_ATTR_GROUP_EVENTS] =
&armv8_pmuv3_events_attr_group;
cpu_pmu->attr_groups[ARMPMU_ATTR_GROUP_FORMATS] =
&armv8_pmuv3_format_attr_group;
return armv8pmu_probe_pmu(cpu_pmu);
return 0;
}
static int armv8_a53_pmu_init(struct arm_pmu *cpu_pmu)
{
armv8_pmu_init(cpu_pmu);
int ret = armv8_pmu_init(cpu_pmu);
if (ret)
return ret;
cpu_pmu->name = "armv8_cortex_a53";
cpu_pmu->map_event = armv8_a53_map_event;
cpu_pmu->attr_groups[ARMPMU_ATTR_GROUP_EVENTS] =
&armv8_pmuv3_events_attr_group;
cpu_pmu->attr_groups[ARMPMU_ATTR_GROUP_FORMATS] =
&armv8_pmuv3_format_attr_group;
return armv8pmu_probe_pmu(cpu_pmu);
return 0;
}
static int armv8_a57_pmu_init(struct arm_pmu *cpu_pmu)
{
armv8_pmu_init(cpu_pmu);
int ret = armv8_pmu_init(cpu_pmu);
if (ret)
return ret;
cpu_pmu->name = "armv8_cortex_a57";
cpu_pmu->map_event = armv8_a57_map_event;
cpu_pmu->attr_groups[ARMPMU_ATTR_GROUP_EVENTS] =
&armv8_pmuv3_events_attr_group;
cpu_pmu->attr_groups[ARMPMU_ATTR_GROUP_FORMATS] =
&armv8_pmuv3_format_attr_group;
return armv8pmu_probe_pmu(cpu_pmu);
return 0;
}
static int armv8_a72_pmu_init(struct arm_pmu *cpu_pmu)
{
armv8_pmu_init(cpu_pmu);
int ret = armv8_pmu_init(cpu_pmu);
if (ret)
return ret;
cpu_pmu->name = "armv8_cortex_a72";
cpu_pmu->map_event = armv8_a57_map_event;
cpu_pmu->attr_groups[ARMPMU_ATTR_GROUP_EVENTS] =
&armv8_pmuv3_events_attr_group;
cpu_pmu->attr_groups[ARMPMU_ATTR_GROUP_FORMATS] =
&armv8_pmuv3_format_attr_group;
return armv8pmu_probe_pmu(cpu_pmu);
return 0;
}
static int armv8_thunder_pmu_init(struct arm_pmu *cpu_pmu)
{
armv8_pmu_init(cpu_pmu);
int ret = armv8_pmu_init(cpu_pmu);
if (ret)
return ret;
cpu_pmu->name = "armv8_cavium_thunder";
cpu_pmu->map_event = armv8_thunder_map_event;
cpu_pmu->attr_groups[ARMPMU_ATTR_GROUP_EVENTS] =
&armv8_pmuv3_events_attr_group;
cpu_pmu->attr_groups[ARMPMU_ATTR_GROUP_FORMATS] =
&armv8_pmuv3_format_attr_group;
return armv8pmu_probe_pmu(cpu_pmu);
return 0;
}
static int armv8_vulcan_pmu_init(struct arm_pmu *cpu_pmu)
{
armv8_pmu_init(cpu_pmu);
int ret = armv8_pmu_init(cpu_pmu);
if (ret)
return ret;
cpu_pmu->name = "armv8_brcm_vulcan";
cpu_pmu->map_event = armv8_vulcan_map_event;
cpu_pmu->attr_groups[ARMPMU_ATTR_GROUP_EVENTS] =
&armv8_pmuv3_events_attr_group;
cpu_pmu->attr_groups[ARMPMU_ATTR_GROUP_FORMATS] =
&armv8_pmuv3_format_attr_group;
return armv8pmu_probe_pmu(cpu_pmu);
return 0;
}
static const struct of_device_id armv8_pmu_of_device_ids[] = {
@ -1081,24 +1143,9 @@ static const struct of_device_id armv8_pmu_of_device_ids[] = {
{},
};
/*
* Non DT systems have their micro/arch events probed at run-time.
* A fairly complete list of generic events are provided and ones that
* aren't supported by the current PMU are disabled.
*/
static const struct pmu_probe_info armv8_pmu_probe_table[] = {
PMU_PROBE(0, 0, armv8_pmuv3_init), /* enable all defined counters */
{ /* sentinel value */ }
};
static int armv8_pmu_device_probe(struct platform_device *pdev)
{
if (acpi_disabled)
return arm_pmu_device_probe(pdev, armv8_pmu_of_device_ids,
NULL);
return arm_pmu_device_probe(pdev, armv8_pmu_of_device_ids,
armv8_pmu_probe_table);
return arm_pmu_device_probe(pdev, armv8_pmu_of_device_ids, NULL);
}
static struct platform_driver armv8_pmu_driver = {
@ -1109,4 +1156,11 @@ static struct platform_driver armv8_pmu_driver = {
.probe = armv8_pmu_device_probe,
};
builtin_platform_driver(armv8_pmu_driver);
static int __init armv8_pmu_driver_init(void)
{
if (acpi_disabled)
return platform_driver_register(&armv8_pmu_driver);
else
return arm_pmu_acpi_probe(armv8_pmuv3_init);
}
device_initcall(armv8_pmu_driver_init)

2
arch/arm64/kernel/process.c
View File

@ -205,12 +205,10 @@ void __show_regs(struct pt_regs *regs)
pr_cont("\n");
}
printk("\n");
}
void show_regs(struct pt_regs * regs)
{
printk("\n");
__show_regs(regs);
}

81
arch/arm64/kernel/reloc_test_core.c Normal file
View File

@ -0,0 +1,81 @@
/*
* Copyright (C) 2017 Linaro, Ltd. <ard.biesheuvel@linaro.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
*/
#include <linux/module.h>
int sym64_rel;
#define SYM64_ABS_VAL 0xffff880000cccccc
#define SYM32_ABS_VAL 0xf800cccc
#define SYM16_ABS_VAL 0xf8cc
#define __SET_ABS(name, val) asm(".globl " #name "; .set "#name ", " #val)
#define SET_ABS(name, val) __SET_ABS(name, val)
SET_ABS(sym64_abs, SYM64_ABS_VAL);
SET_ABS(sym32_abs, SYM32_ABS_VAL);
SET_ABS(sym16_abs, SYM16_ABS_VAL);
asmlinkage u64 absolute_data64(void);
asmlinkage u64 absolute_data32(void);
asmlinkage u64 absolute_data16(void);
asmlinkage u64 signed_movw(void);
asmlinkage u64 unsigned_movw(void);
asmlinkage u64 relative_adrp(void);
asmlinkage u64 relative_adr(void);
asmlinkage u64 relative_data64(void);
asmlinkage u64 relative_data32(void);
asmlinkage u64 relative_data16(void);
static struct {
char name[32];
u64 (*f)(void);
u64 expect;
} const funcs[] = {
{ "R_AARCH64_ABS64", absolute_data64, UL(SYM64_ABS_VAL) },
{ "R_AARCH64_ABS32", absolute_data32, UL(SYM32_ABS_VAL) },
{ "R_AARCH64_ABS16", absolute_data16, UL(SYM16_ABS_VAL) },
{ "R_AARCH64_MOVW_SABS_Gn", signed_movw, UL(SYM64_ABS_VAL) },
{ "R_AARCH64_MOVW_UABS_Gn", unsigned_movw, UL(SYM64_ABS_VAL) },
#ifndef CONFIG_ARM64_ERRATUM_843419
{ "R_AARCH64_ADR_PREL_PG_HI21", relative_adrp, (u64)&sym64_rel },
#endif
{ "R_AARCH64_ADR_PREL_LO21", relative_adr, (u64)&sym64_rel },
{ "R_AARCH64_PREL64", relative_data64, (u64)&sym64_rel },
{ "R_AARCH64_PREL32", relative_data32, (u64)&sym64_rel },
{ "R_AARCH64_PREL16", relative_data16, (u64)&sym64_rel },
};
static int reloc_test_init(void)
{
int i;
pr_info("Relocation test:\n");
pr_info("-------------------------------------------------------\n");
for (i = 0; i < ARRAY_SIZE(funcs); i++) {
u64 ret = funcs[i].f();
pr_info("%-31s 0x%016llx %s\n", funcs[i].name, ret,
ret == funcs[i].expect ? "pass" : "fail");
if (ret != funcs[i].expect)
pr_err("Relocation failed, expected 0x%016llx, not 0x%016llx\n",
funcs[i].expect, ret);
}
return 0;
}
static void reloc_test_exit(void)
{
}
module_init(reloc_test_init);
module_exit(reloc_test_exit);
MODULE_LICENSE("GPL v2");

83
arch/arm64/kernel/reloc_test_syms.S Normal file
View File

@ -0,0 +1,83 @@
/*
* Copyright (C) 2017 Linaro, Ltd. <ard.biesheuvel@linaro.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
*/
#include <linux/linkage.h>
ENTRY(absolute_data64)
ldr x0, 0f
ret
0: .quad sym64_abs
ENDPROC(absolute_data64)
ENTRY(absolute_data32)
ldr w0, 0f
ret
0: .long sym32_abs
ENDPROC(absolute_data32)
ENTRY(absolute_data16)
adr x0, 0f
ldrh w0, [x0]
ret
0: .short sym16_abs, 0
ENDPROC(absolute_data16)
ENTRY(signed_movw)
movz x0, #:abs_g2_s:sym64_abs
movk x0, #:abs_g1_nc:sym64_abs
movk x0, #:abs_g0_nc:sym64_abs
ret
ENDPROC(signed_movw)
ENTRY(unsigned_movw)
movz x0, #:abs_g3:sym64_abs
movk x0, #:abs_g2_nc:sym64_abs
movk x0, #:abs_g1_nc:sym64_abs
movk x0, #:abs_g0_nc:sym64_abs
ret
ENDPROC(unsigned_movw)
#ifndef CONFIG_ARM64_ERRATUM_843419
ENTRY(relative_adrp)
adrp x0, sym64_rel
add x0, x0, #:lo12:sym64_rel
ret
ENDPROC(relative_adrp)
#endif
ENTRY(relative_adr)
adr x0, sym64_rel
ret
ENDPROC(relative_adr)
ENTRY(relative_data64)
adr x1, 0f
ldr x0, [x1]
add x0, x0, x1
ret
0: .quad sym64_rel - .
ENDPROC(relative_data64)
ENTRY(relative_data32)
adr x1, 0f
ldr w0, [x1]
add x0, x0, x1
ret
0: .long sym64_rel - .
ENDPROC(relative_data32)
ENTRY(relative_data16)
adr x1, 0f
ldrsh w0, [x1]
add x0, x0, x1
ret
0: .short sym64_rel - ., 0
ENDPROC(relative_data16)

12
arch/arm64/kernel/setup.c
View File

@ -31,7 +31,6 @@
#include <linux/screen_info.h>
#include <linux/init.h>
#include <linux/kexec.h>
#include <linux/crash_dump.h>
#include <linux/root_dev.h>
#include <linux/cpu.h>
#include <linux/interrupt.h>
@ -181,6 +180,7 @@ static void __init smp_build_mpidr_hash(void)
static void __init setup_machine_fdt(phys_addr_t dt_phys)
{
void *dt_virt = fixmap_remap_fdt(dt_phys);
const char *name;
if (!dt_virt || !early_init_dt_scan(dt_virt)) {
pr_crit("\n"
@ -193,7 +193,9 @@ static void __init setup_machine_fdt(phys_addr_t dt_phys)
cpu_relax();
}
dump_stack_set_arch_desc("%s (DT)", of_flat_dt_get_machine_name());
name = of_flat_dt_get_machine_name();
pr_info("Machine model: %s\n", name);
dump_stack_set_arch_desc("%s (DT)", name);
}
static void __init request_standard_resources(void)
@ -226,6 +228,12 @@ static void __init request_standard_resources(void)
if (kernel_data.start >= res->start &&
kernel_data.end <= res->end)
request_resource(res, &kernel_data);
#ifdef CONFIG_KEXEC_CORE
/* Userspace will find "Crash kernel" region in /proc/iomem. */
if (crashk_res.end && crashk_res.start >= res->start &&
crashk_res.end <= res->end)
request_resource(res, &crashk_res);
#endif
}
}

79
arch/arm64/kernel/smp.c
View File

@ -39,6 +39,7 @@
#include <linux/completion.h>
#include <linux/of.h>
#include <linux/irq_work.h>
#include <linux/kexec.h>
#include <asm/alternative.h>
#include <asm/atomic.h>
@ -76,6 +77,7 @@ enum ipi_msg_type {
IPI_RESCHEDULE,
IPI_CALL_FUNC,
IPI_CPU_STOP,
IPI_CPU_CRASH_STOP,
IPI_TIMER,
IPI_IRQ_WORK,
IPI_WAKEUP
@ -434,6 +436,7 @@ void __init smp_cpus_done(unsigned int max_cpus)
setup_cpu_features();
hyp_mode_check();
apply_alternatives_all();
mark_linear_text_alias_ro();
}
void __init smp_prepare_boot_cpu(void)
@ -518,6 +521,13 @@ static bool bootcpu_valid __initdata;
static unsigned int cpu_count = 1;
#ifdef CONFIG_ACPI
static struct acpi_madt_generic_interrupt cpu_madt_gicc[NR_CPUS];
struct acpi_madt_generic_interrupt *acpi_cpu_get_madt_gicc(int cpu)
{
return &cpu_madt_gicc[cpu];
}
/*
* acpi_map_gic_cpu_interface - parse processor MADT entry
*
@ -552,6 +562,7 @@ acpi_map_gic_cpu_interface(struct acpi_madt_generic_interrupt *processor)
return;
}
bootcpu_valid = true;
cpu_madt_gicc[0] = *processor;
early_map_cpu_to_node(0, acpi_numa_get_nid(0, hwid));
return;
}
@ -562,6 +573,8 @@ acpi_map_gic_cpu_interface(struct acpi_madt_generic_interrupt *processor)
/* map the logical cpu id to cpu MPIDR */
cpu_logical_map(cpu_count) = hwid;
cpu_madt_gicc[cpu_count] = *processor;
/*
* Set-up the ACPI parking protocol cpu entries
* while initializing the cpu_logical_map to
@ -755,6 +768,7 @@ static const char *ipi_types[NR_IPI] __tracepoint_string = {
S(IPI_RESCHEDULE, "Rescheduling interrupts"),
S(IPI_CALL_FUNC, "Function call interrupts"),
S(IPI_CPU_STOP, "CPU stop interrupts"),
S(IPI_CPU_CRASH_STOP, "CPU stop (for crash dump) interrupts"),
S(IPI_TIMER, "Timer broadcast interrupts"),
S(IPI_IRQ_WORK, "IRQ work interrupts"),
S(IPI_WAKEUP, "CPU wake-up interrupts"),
@ -829,6 +843,29 @@ static void ipi_cpu_stop(unsigned int cpu)
cpu_relax();
}
#ifdef CONFIG_KEXEC_CORE
static atomic_t waiting_for_crash_ipi = ATOMIC_INIT(0);
#endif
static void ipi_cpu_crash_stop(unsigned int cpu, struct pt_regs *regs)
{
#ifdef CONFIG_KEXEC_CORE
crash_save_cpu(regs, cpu);
atomic_dec(&waiting_for_crash_ipi);
local_irq_disable();
#ifdef CONFIG_HOTPLUG_CPU
if (cpu_ops[cpu]->cpu_die)
cpu_ops[cpu]->cpu_die(cpu);
#endif
/* just in case */
cpu_park_loop();
#endif
}
/*
* Main handler for inter-processor interrupts
*/
@ -859,6 +896,15 @@ void handle_IPI(int ipinr, struct pt_regs *regs)
irq_exit();
break;
case IPI_CPU_CRASH_STOP:
if (IS_ENABLED(CONFIG_KEXEC_CORE)) {
irq_enter();
ipi_cpu_crash_stop(cpu, regs);
unreachable();
}
break;
#ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST
case IPI_TIMER:
irq_enter();
@ -931,6 +977,39 @@ void smp_send_stop(void)
cpumask_pr_args(cpu_online_mask));
}
#ifdef CONFIG_KEXEC_CORE
void smp_send_crash_stop(void)
{
cpumask_t mask;
unsigned long timeout;
if (num_online_cpus() == 1)
return;
cpumask_copy(&mask, cpu_online_mask);
cpumask_clear_cpu(smp_processor_id(), &mask);
atomic_set(&waiting_for_crash_ipi, num_online_cpus() - 1);
pr_crit("SMP: stopping secondary CPUs\n");
smp_cross_call(&mask, IPI_CPU_CRASH_STOP);
/* Wait up to one second for other CPUs to stop */
timeout = USEC_PER_SEC;
while ((atomic_read(&waiting_for_crash_ipi) > 0) && timeout--)
udelay(1);
if (atomic_read(&waiting_for_crash_ipi) > 0)
pr_warning("SMP: failed to stop secondary CPUs %*pbl\n",
cpumask_pr_args(&mask));
}
bool smp_crash_stop_failed(void)
{
return (atomic_read(&waiting_for_crash_ipi) > 0);
}
#endif
/*
* not supported here
*/

14
arch/arm64/kernel/traps.c
View File

@ -513,6 +513,14 @@ static void cntvct_read_handler(unsigned int esr, struct pt_regs *regs)
regs->pc += 4;
}
static void cntfrq_read_handler(unsigned int esr, struct pt_regs *regs)
{
int rt = (esr & ESR_ELx_SYS64_ISS_RT_MASK) >> ESR_ELx_SYS64_ISS_RT_SHIFT;
pt_regs_write_reg(regs, rt, read_sysreg(cntfrq_el0));
regs->pc += 4;
}
struct sys64_hook {
unsigned int esr_mask;
unsigned int esr_val;
@ -537,6 +545,12 @@ static struct sys64_hook sys64_hooks[] = {
.esr_val = ESR_ELx_SYS64_ISS_SYS_CNTVCT,
.handler = cntvct_read_handler,
},
{
/* Trap read access to CNTFRQ_EL0 */
.esr_mask = ESR_ELx_SYS64_ISS_SYS_OP_MASK,
.esr_val = ESR_ELx_SYS64_ISS_SYS_CNTFRQ,
.handler = cntfrq_read_handler,
},
{},
};

27
arch/arm64/kernel/vmlinux.lds.S
View File

@ -143,12 +143,27 @@ SECTIONS
. = ALIGN(SEGMENT_ALIGN);
__init_begin = .;
__inittext_begin = .;
INIT_TEXT_SECTION(8)
.exit.text : {
ARM_EXIT_KEEP(EXIT_TEXT)
}
. = ALIGN(4);
.altinstructions : {
__alt_instructions = .;
*(.altinstructions)
__alt_instructions_end = .;
}
.altinstr_replacement : {
*(.altinstr_replacement)
}
. = ALIGN(PAGE_SIZE);
__inittext_end = .;
__initdata_begin = .;
.init.data : {
INIT_DATA
INIT_SETUP(16)
@ -164,15 +179,6 @@ SECTIONS
PERCPU_SECTION(L1_CACHE_BYTES)
. = ALIGN(4);
.altinstructions : {
__alt_instructions = .;
*(.altinstructions)
__alt_instructions_end = .;
}
.altinstr_replacement : {
*(.altinstr_replacement)
}
.rela : ALIGN(8) {
*(.rela .rela*)
}
@ -181,6 +187,7 @@ SECTIONS
__rela_size = SIZEOF(.rela);
. = ALIGN(SEGMENT_ALIGN);
__initdata_end = .;
__init_end = .;
_data = .;
@ -206,6 +213,7 @@ SECTIONS
}
PECOFF_EDATA_PADDING
__pecoff_data_rawsize = ABSOLUTE(. - __initdata_begin);
_edata = .;
BSS_SECTION(0, 0, 0)
@ -221,6 +229,7 @@ SECTIONS
. += RESERVED_TTBR0_SIZE;
#endif
__pecoff_data_size = ABSOLUTE(. - __initdata_begin);
_end = .;
STABS_DEBUG

22
arch/arm64/kvm/hyp/tlb.c
View File

@ -94,6 +94,28 @@ void __hyp_text __kvm_tlb_flush_vmid_ipa(struct kvm *kvm, phys_addr_t ipa)
dsb(ish);
isb();
/*
* If the host is running at EL1 and we have a VPIPT I-cache,
* then we must perform I-cache maintenance at EL2 in order for
* it to have an effect on the guest. Since the guest cannot hit
* I-cache lines allocated with a different VMID, we don't need
* to worry about junk out of guest reset (we nuke the I-cache on
* VMID rollover), but we do need to be careful when remapping
* executable pages for the same guest. This can happen when KSM
* takes a CoW fault on an executable page, copies the page into
* a page that was previously mapped in the guest and then needs
* to invalidate the guest view of the I-cache for that page
* from EL1. To solve this, we invalidate the entire I-cache when
* unmapping a page from a guest if we have a VPIPT I-cache but
* the host is running at EL1. As above, we could do better if
* we had the VA.
*
* The moral of this story is: if you have a VPIPT I-cache, then
* you should be running with VHE enabled.
*/
if (!has_vhe() && icache_is_vpipt())
__flush_icache_all();
__tlb_switch_to_host()(kvm);
}

2
arch/arm64/kvm/reset.c
View File

@ -60,7 +60,7 @@ static bool cpu_has_32bit_el1(void)
{
u64 pfr0;
pfr0 = read_system_reg(SYS_ID_AA64PFR0_EL1);
pfr0 = read_sanitised_ftr_reg(SYS_ID_AA64PFR0_EL1);
return !!(pfr0 & 0x20);
}

4
arch/arm64/kvm/sys_regs.c
View File

@ -1183,8 +1183,8 @@ static bool trap_dbgidr(struct kvm_vcpu *vcpu,
if (p->is_write) {
return ignore_write(vcpu, p);
} else {
u64 dfr = read_system_reg(SYS_ID_AA64DFR0_EL1);
u64 pfr = read_system_reg(SYS_ID_AA64PFR0_EL1);
u64 dfr = read_sanitised_ftr_reg(SYS_ID_AA64DFR0_EL1);
u64 pfr = read_sanitised_ftr_reg(SYS_ID_AA64PFR0_EL1);
u32 el3 = !!cpuid_feature_extract_unsigned_field(pfr, ID_AA64PFR0_EL3_SHIFT);
p->regval = ((((dfr >> ID_AA64DFR0_WRPS_SHIFT) & 0xf) << 28) |

3
arch/arm64/mm/context.c
View File

@ -119,9 +119,6 @@ static void flush_context(unsigned int cpu)
/* Queue a TLB invalidate and flush the I-cache if necessary. */
cpumask_setall(&tlb_flush_pending);
if (icache_is_aivivt())
__flush_icache_all();
}
static bool check_update_reserved_asid(u64 asid, u64 newasid)

128
arch/arm64/mm/dma-mapping.c
View File

@ -308,24 +308,15 @@ static void __swiotlb_sync_sg_for_device(struct device *dev,
sg->length, dir);
}
static int __swiotlb_mmap(struct device *dev,
struct vm_area_struct *vma,
void *cpu_addr, dma_addr_t dma_addr, size_t size,
unsigned long attrs)
static int __swiotlb_mmap_pfn(struct vm_area_struct *vma,
unsigned long pfn, size_t size)
{
int ret = -ENXIO;
unsigned long nr_vma_pages = (vma->vm_end - vma->vm_start) >>
PAGE_SHIFT;
unsigned long nr_pages = PAGE_ALIGN(size) >> PAGE_SHIFT;
unsigned long pfn = dma_to_phys(dev, dma_addr) >> PAGE_SHIFT;
unsigned long off = vma->vm_pgoff;
vma->vm_page_prot = __get_dma_pgprot(attrs, vma->vm_page_prot,
is_device_dma_coherent(dev));
if (dma_mmap_from_coherent(dev, vma, cpu_addr, size, &ret))
return ret;
if (off < nr_pages && nr_vma_pages <= (nr_pages - off)) {
ret = remap_pfn_range(vma, vma->vm_start,
pfn + off,
@ -336,19 +327,43 @@ static int __swiotlb_mmap(struct device *dev,
return ret;
}
static int __swiotlb_get_sgtable(struct device *dev, struct sg_table *sgt,
void *cpu_addr, dma_addr_t handle, size_t size,
unsigned long attrs)
static int __swiotlb_mmap(struct device *dev,
struct vm_area_struct *vma,
void *cpu_addr, dma_addr_t dma_addr, size_t size,
unsigned long attrs)
{
int ret;
unsigned long pfn = dma_to_phys(dev, dma_addr) >> PAGE_SHIFT;
vma->vm_page_prot = __get_dma_pgprot(attrs, vma->vm_page_prot,
is_device_dma_coherent(dev));
if (dma_mmap_from_coherent(dev, vma, cpu_addr, size, &ret))
return ret;
return __swiotlb_mmap_pfn(vma, pfn, size);
}
static int __swiotlb_get_sgtable_page(struct sg_table *sgt,
struct page *page, size_t size)
{
int ret = sg_alloc_table(sgt, 1, GFP_KERNEL);
if (!ret)
sg_set_page(sgt->sgl, phys_to_page(dma_to_phys(dev, handle)),
PAGE_ALIGN(size), 0);
sg_set_page(sgt->sgl, page, PAGE_ALIGN(size), 0);
return ret;
}
static int __swiotlb_get_sgtable(struct device *dev, struct sg_table *sgt,
void *cpu_addr, dma_addr_t handle, size_t size,
unsigned long attrs)
{
struct page *page = phys_to_page(dma_to_phys(dev, handle));
return __swiotlb_get_sgtable_page(sgt, page, size);
}
static int __swiotlb_dma_supported(struct device *hwdev, u64 mask)
{
if (swiotlb)
@ -584,20 +599,7 @@ static void *__iommu_alloc_attrs(struct device *dev, size_t size,
*/
gfp |= __GFP_ZERO;
if (gfpflags_allow_blocking(gfp)) {
struct page **pages;
pgprot_t prot = __get_dma_pgprot(attrs, PAGE_KERNEL, coherent);
pages = iommu_dma_alloc(dev, iosize, gfp, attrs, ioprot,
handle, flush_page);
if (!pages)
return NULL;
addr = dma_common_pages_remap(pages, size, VM_USERMAP, prot,
__builtin_return_address(0));
if (!addr)
iommu_dma_free(dev, pages, iosize, handle);
} else {
if (!gfpflags_allow_blocking(gfp)) {
struct page *page;
/*
* In atomic context we can't remap anything, so we'll only
@ -621,6 +623,45 @@ static void *__iommu_alloc_attrs(struct device *dev, size_t size,
__free_from_pool(addr, size);
addr = NULL;
}
} else if (attrs & DMA_ATTR_FORCE_CONTIGUOUS) {
pgprot_t prot = __get_dma_pgprot(attrs, PAGE_KERNEL, coherent);
struct page *page;
page = dma_alloc_from_contiguous(dev, size >> PAGE_SHIFT,
get_order(size), gfp);
if (!page)
return NULL;
*handle = iommu_dma_map_page(dev, page, 0, iosize, ioprot);
if (iommu_dma_mapping_error(dev, *handle)) {
dma_release_from_contiguous(dev, page,
size >> PAGE_SHIFT);
return NULL;
}
if (!coherent)
__dma_flush_area(page_to_virt(page), iosize);
addr = dma_common_contiguous_remap(page, size, VM_USERMAP,
prot,
__builtin_return_address(0));
if (!addr) {
iommu_dma_unmap_page(dev, *handle, iosize, 0, attrs);
dma_release_from_contiguous(dev, page,
size >> PAGE_SHIFT);
}
} else {
pgprot_t prot = __get_dma_pgprot(attrs, PAGE_KERNEL, coherent);
struct page **pages;
pages = iommu_dma_alloc(dev, iosize, gfp, attrs, ioprot,
handle, flush_page);
if (!pages)
return NULL;
addr = dma_common_pages_remap(pages, size, VM_USERMAP, prot,
__builtin_return_address(0));
if (!addr)
iommu_dma_free(dev, pages, iosize, handle);
}
return addr;
}
@ -632,7 +673,8 @@ static void __iommu_free_attrs(struct device *dev, size_t size, void *cpu_addr,
size = PAGE_ALIGN(size);
/*
* @cpu_addr will be one of 3 things depending on how it was allocated:
* @cpu_addr will be one of 4 things depending on how it was allocated:
* - A remapped array of pages for contiguous allocations.
* - A remapped array of pages from iommu_dma_alloc(), for all
* non-atomic allocations.
* - A non-cacheable alias from the atomic pool, for atomic
@ -644,6 +686,12 @@ static void __iommu_free_attrs(struct device *dev, size_t size, void *cpu_addr,
if (__in_atomic_pool(cpu_addr, size)) {
iommu_dma_unmap_page(dev, handle, iosize, 0, 0);
__free_from_pool(cpu_addr, size);
} else if (attrs & DMA_ATTR_FORCE_CONTIGUOUS) {
struct page *page = vmalloc_to_page(cpu_addr);
iommu_dma_unmap_page(dev, handle, iosize, 0, attrs);
dma_release_from_contiguous(dev, page, size >> PAGE_SHIFT);
dma_common_free_remap(cpu_addr, size, VM_USERMAP);
} else if (is_vmalloc_addr(cpu_addr)){
struct vm_struct *area = find_vm_area(cpu_addr);
@ -670,6 +718,15 @@ static int __iommu_mmap_attrs(struct device *dev, struct vm_area_struct *vma,
if (dma_mmap_from_coherent(dev, vma, cpu_addr, size, &ret))
return ret;
if (attrs & DMA_ATTR_FORCE_CONTIGUOUS) {
/*
* DMA_ATTR_FORCE_CONTIGUOUS allocations are always remapped,
* hence in the vmalloc space.
*/
unsigned long pfn = vmalloc_to_pfn(cpu_addr);
return __swiotlb_mmap_pfn(vma, pfn, size);
}
area = find_vm_area(cpu_addr);
if (WARN_ON(!area || !area->pages))
return -ENXIO;
@ -684,6 +741,15 @@ static int __iommu_get_sgtable(struct device *dev, struct sg_table *sgt,
unsigned int count = PAGE_ALIGN(size) >> PAGE_SHIFT;
struct vm_struct *area = find_vm_area(cpu_addr);
if (attrs & DMA_ATTR_FORCE_CONTIGUOUS) {
/*
* DMA_ATTR_FORCE_CONTIGUOUS allocations are always remapped,
* hence in the vmalloc space.
*/
struct page *page = vmalloc_to_page(cpu_addr);
return __swiotlb_get_sgtable_page(sgt, page, size);
}
if (WARN_ON(!area || !area->pages))
return -ENXIO;

55
arch/arm64/mm/fault.c
View File

@ -174,12 +174,33 @@ static bool is_el1_instruction_abort(unsigned int esr)
return ESR_ELx_EC(esr) == ESR_ELx_EC_IABT_CUR;
}
static inline bool is_permission_fault(unsigned int esr, struct pt_regs *regs,
unsigned long addr)
{
unsigned int ec = ESR_ELx_EC(esr);
unsigned int fsc_type = esr & ESR_ELx_FSC_TYPE;
if (ec != ESR_ELx_EC_DABT_CUR && ec != ESR_ELx_EC_IABT_CUR)
return false;
if (fsc_type == ESR_ELx_FSC_PERM)
return true;
if (addr < USER_DS && system_uses_ttbr0_pan())
return fsc_type == ESR_ELx_FSC_FAULT &&
(regs->pstate & PSR_PAN_BIT);
return false;
}
/*
* The kernel tried to access some page that wasn't present.
*/
static void __do_kernel_fault(struct mm_struct *mm, unsigned long addr,
unsigned int esr, struct pt_regs *regs)
{
const char *msg;
/*
* Are we prepared to handle this kernel fault?
* We are almost certainly not prepared to handle instruction faults.
@ -191,9 +212,20 @@ static void __do_kernel_fault(struct mm_struct *mm, unsigned long addr,
* No handler, we'll have to terminate things with extreme prejudice.
*/
bust_spinlocks(1);
pr_alert("Unable to handle kernel %s at virtual address %08lx\n",
(addr < PAGE_SIZE) ? "NULL pointer dereference" :
"paging request", addr);
if (is_permission_fault(esr, regs, addr)) {
if (esr & ESR_ELx_WNR)
msg = "write to read-only memory";
else
msg = "read from unreadable memory";
} else if (addr < PAGE_SIZE) {
msg = "NULL pointer dereference";
} else {
msg = "paging request";
}
pr_alert("Unable to handle kernel %s at virtual address %08lx\n", msg,
addr);
show_pte(mm, addr);
die("Oops", regs, esr);
@ -287,21 +319,6 @@ static int __do_page_fault(struct mm_struct *mm, unsigned long addr,
return fault;
}
static inline bool is_permission_fault(unsigned int esr, struct pt_regs *regs)
{
unsigned int ec = ESR_ELx_EC(esr);
unsigned int fsc_type = esr & ESR_ELx_FSC_TYPE;
if (ec != ESR_ELx_EC_DABT_CUR && ec != ESR_ELx_EC_IABT_CUR)
return false;
if (system_uses_ttbr0_pan())
return fsc_type == ESR_ELx_FSC_FAULT &&
(regs->pstate & PSR_PAN_BIT);
else
return fsc_type == ESR_ELx_FSC_PERM;
}
static bool is_el0_instruction_abort(unsigned int esr)
{
return ESR_ELx_EC(esr) == ESR_ELx_EC_IABT_LOW;
@ -339,7 +356,7 @@ static int __kprobes do_page_fault(unsigned long addr, unsigned int esr,
mm_flags |= FAULT_FLAG_WRITE;
}
if (addr < USER_DS && is_permission_fault(esr, regs)) {
if (addr < USER_DS && is_permission_fault(esr, regs, addr)) {
/* regs->orig_addr_limit may be 0 if we entered from EL0 */
if (regs->orig_addr_limit == KERNEL_DS)
die("Accessing user space memory with fs=KERNEL_DS", regs, esr);

4
arch/arm64/mm/flush.c
View File

@ -22,7 +22,7 @@
#include <linux/pagemap.h>
#include <asm/cacheflush.h>
#include <asm/cachetype.h>
#include <asm/cache.h>
#include <asm/tlbflush.h>
void sync_icache_aliases(void *kaddr, unsigned long len)
@ -65,8 +65,6 @@ void __sync_icache_dcache(pte_t pte, unsigned long addr)
if (!test_and_set_bit(PG_dcache_clean, &page->flags))
sync_icache_aliases(page_address(page),
PAGE_SIZE << compound_order(page));
else if (icache_is_aivivt())
__flush_icache_all();
}
/*

181
arch/arm64/mm/init.c
View File

@ -30,6 +30,7 @@
#include <linux/gfp.h>
#include <linux/memblock.h>
#include <linux/sort.h>
#include <linux/of.h>
#include <linux/of_fdt.h>
#include <linux/dma-mapping.h>
#include <linux/dma-contiguous.h>
@ -37,6 +38,8 @@
#include <linux/swiotlb.h>
#include <linux/vmalloc.h>
#include <linux/mm.h>
#include <linux/kexec.h>
#include <linux/crash_dump.h>
#include <asm/boot.h>
#include <asm/fixmap.h>
@ -77,6 +80,142 @@ static int __init early_initrd(char *p)
early_param("initrd", early_initrd);
#endif
#ifdef CONFIG_KEXEC_CORE
/*
* reserve_crashkernel() - reserves memory for crash kernel
*
* This function reserves memory area given in "crashkernel=" kernel command
* line parameter. The memory reserved is used by dump capture kernel when
* primary kernel is crashing.
*/
static void __init reserve_crashkernel(void)
{
unsigned long long crash_base, crash_size;
int ret;
ret = parse_crashkernel(boot_command_line, memblock_phys_mem_size(),
&crash_size, &crash_base);
/* no crashkernel= or invalid value specified */
if (ret || !crash_size)
return;
crash_size = PAGE_ALIGN(crash_size);
if (crash_base == 0) {
/* Current arm64 boot protocol requires 2MB alignment */
crash_base = memblock_find_in_range(0, ARCH_LOW_ADDRESS_LIMIT,
crash_size, SZ_2M);
if (crash_base == 0) {
pr_warn("cannot allocate crashkernel (size:0x%llx)\n",
crash_size);
return;
}
} else {
/* User specifies base address explicitly. */
if (!memblock_is_region_memory(crash_base, crash_size)) {
pr_warn("cannot reserve crashkernel: region is not memory\n");
return;
}
if (memblock_is_region_reserved(crash_base, crash_size)) {
pr_warn("cannot reserve crashkernel: region overlaps reserved memory\n");
return;
}
if (!IS_ALIGNED(crash_base, SZ_2M)) {
pr_warn("cannot reserve crashkernel: base address is not 2MB aligned\n");
return;
}
}
memblock_reserve(crash_base, crash_size);
pr_info("crashkernel reserved: 0x%016llx - 0x%016llx (%lld MB)\n",
crash_base, crash_base + crash_size, crash_size >> 20);
crashk_res.start = crash_base;
crashk_res.end = crash_base + crash_size - 1;
}
static void __init kexec_reserve_crashkres_pages(void)
{
#ifdef CONFIG_HIBERNATION
phys_addr_t addr;
struct page *page;
if (!crashk_res.end)
return;
/*
* To reduce the size of hibernation image, all the pages are
* marked as Reserved initially.
*/
for (addr = crashk_res.start; addr < (crashk_res.end + 1);
addr += PAGE_SIZE) {
page = phys_to_page(addr);
SetPageReserved(page);
}
#endif
}
#else
static void __init reserve_crashkernel(void)
{
}
static void __init kexec_reserve_crashkres_pages(void)
{
}
#endif /* CONFIG_KEXEC_CORE */
#ifdef CONFIG_CRASH_DUMP
static int __init early_init_dt_scan_elfcorehdr(unsigned long node,
const char *uname, int depth, void *data)
{
const __be32 *reg;
int len;
if (depth != 1 || strcmp(uname, "chosen") != 0)
return 0;
reg = of_get_flat_dt_prop(node, "linux,elfcorehdr", &len);
if (!reg || (len < (dt_root_addr_cells + dt_root_size_cells)))
return 1;
elfcorehdr_addr = dt_mem_next_cell(dt_root_addr_cells, &reg);
elfcorehdr_size = dt_mem_next_cell(dt_root_size_cells, &reg);
return 1;
}
/*
* reserve_elfcorehdr() - reserves memory for elf core header
*
* This function reserves the memory occupied by an elf core header
* described in the device tree. This region contains all the
* information about primary kernel's core image and is used by a dump
* capture kernel to access the system memory on primary kernel.
*/
static void __init reserve_elfcorehdr(void)
{
of_scan_flat_dt(early_init_dt_scan_elfcorehdr, NULL);
if (!elfcorehdr_size)
return;
if (memblock_is_region_reserved(elfcorehdr_addr, elfcorehdr_size)) {
pr_warn("elfcorehdr is overlapped\n");
return;
}
memblock_reserve(elfcorehdr_addr, elfcorehdr_size);
pr_info("Reserving %lldKB of memory at 0x%llx for elfcorehdr\n",
elfcorehdr_size >> 10, elfcorehdr_addr);
}
#else
static void __init reserve_elfcorehdr(void)
{
}
#endif /* CONFIG_CRASH_DUMP */
/*
* Return the maximum physical address for ZONE_DMA (DMA_BIT_MASK(32)). It
* currently assumes that for memory starting above 4G, 32-bit devices will
@ -188,10 +327,45 @@ static int __init early_mem(char *p)
}
early_param("mem", early_mem);
static int __init early_init_dt_scan_usablemem(unsigned long node,
const char *uname, int depth, void *data)
{
struct memblock_region *usablemem = data;
const __be32 *reg;
int len;
if (depth != 1 || strcmp(uname, "chosen") != 0)
return 0;
reg = of_get_flat_dt_prop(node, "linux,usable-memory-range", &len);
if (!reg || (len < (dt_root_addr_cells + dt_root_size_cells)))
return 1;
usablemem->base = dt_mem_next_cell(dt_root_addr_cells, &reg);
usablemem->size = dt_mem_next_cell(dt_root_size_cells, &reg);
return 1;
}
static void __init fdt_enforce_memory_region(void)
{
struct memblock_region reg = {
.size = 0,
};
of_scan_flat_dt(early_init_dt_scan_usablemem, &reg);
if (reg.size)
memblock_cap_memory_range(reg.base, reg.size);
}
void __init arm64_memblock_init(void)
{
const s64 linear_region_size = -(s64)PAGE_OFFSET;
/* Handle linux,usable-memory-range property */
fdt_enforce_memory_region();
/*
* Ensure that the linear region takes up exactly half of the kernel
* virtual address space. This way, we can distinguish a linear address
@ -297,6 +471,11 @@ void __init arm64_memblock_init(void)
arm64_dma_phys_limit = max_zone_dma_phys();
else
arm64_dma_phys_limit = PHYS_MASK + 1;
reserve_crashkernel();
reserve_elfcorehdr();
dma_contiguous_reserve(arm64_dma_phys_limit);
memblock_allow_resize();
@ -416,6 +595,8 @@ void __init mem_init(void)
/* this will put all unused low memory onto the freelists */
free_all_bootmem();
kexec_reserve_crashkres_pages();
mem_init_print_info(NULL);
#define MLK(b, t) b, t, ((t) - (b)) >> 10

311
arch/arm64/mm/mmu.c
View File

@ -22,6 +22,8 @@
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/ioport.h>
#include <linux/kexec.h>
#include <linux/libfdt.h>
#include <linux/mman.h>
#include <linux/nodemask.h>
@ -43,6 +45,9 @@
#include <asm/mmu_context.h>
#include <asm/ptdump.h>
#define NO_BLOCK_MAPPINGS BIT(0)
#define NO_CONT_MAPPINGS BIT(1)
u64 idmap_t0sz = TCR_T0SZ(VA_BITS);
u64 kimage_voffset __ro_after_init;
@ -103,33 +108,27 @@ static bool pgattr_change_is_safe(u64 old, u64 new)
*/
static const pteval_t mask = PTE_PXN | PTE_RDONLY | PTE_WRITE;
return old == 0 || new == 0 || ((old ^ new) & ~mask) == 0;
/* creating or taking down mappings is always safe */
if (old == 0 || new == 0)
return true;
/* live contiguous mappings may not be manipulated at all */
if ((old | new) & PTE_CONT)
return false;
return ((old ^ new) & ~mask) == 0;
}
static void alloc_init_pte(pmd_t *pmd, unsigned long addr,
unsigned long end, unsigned long pfn,
pgprot_t prot,
phys_addr_t (*pgtable_alloc)(void))
static void init_pte(pmd_t *pmd, unsigned long addr, unsigned long end,
phys_addr_t phys, pgprot_t prot)
{
pte_t *pte;
BUG_ON(pmd_sect(*pmd));
if (pmd_none(*pmd)) {
phys_addr_t pte_phys;
BUG_ON(!pgtable_alloc);
pte_phys = pgtable_alloc();
pte = pte_set_fixmap(pte_phys);
__pmd_populate(pmd, pte_phys, PMD_TYPE_TABLE);
pte_clear_fixmap();
}
BUG_ON(pmd_bad(*pmd));
pte = pte_set_fixmap_offset(pmd, addr);
do {
pte_t old_pte = *pte;
set_pte(pte, pfn_pte(pfn, prot));
pfn++;
set_pte(pte, pfn_pte(__phys_to_pfn(phys), prot));
/*
* After the PTE entry has been populated once, we
@ -137,32 +136,51 @@ static void alloc_init_pte(pmd_t *pmd, unsigned long addr,
*/
BUG_ON(!pgattr_change_is_safe(pte_val(old_pte), pte_val(*pte)));
phys += PAGE_SIZE;
} while (pte++, addr += PAGE_SIZE, addr != end);
pte_clear_fixmap();
}
static void alloc_init_pmd(pud_t *pud, unsigned long addr, unsigned long end,
phys_addr_t phys, pgprot_t prot,
phys_addr_t (*pgtable_alloc)(void),
bool page_mappings_only)
static void alloc_init_cont_pte(pmd_t *pmd, unsigned long addr,
unsigned long end, phys_addr_t phys,
pgprot_t prot,
phys_addr_t (*pgtable_alloc)(void),
int flags)
{
pmd_t *pmd;
unsigned long next;
/*
* Check for initial section mappings in the pgd/pud and remove them.
*/
BUG_ON(pud_sect(*pud));
if (pud_none(*pud)) {
phys_addr_t pmd_phys;
BUG_ON(pmd_sect(*pmd));
if (pmd_none(*pmd)) {
phys_addr_t pte_phys;
BUG_ON(!pgtable_alloc);
pmd_phys = pgtable_alloc();
pmd = pmd_set_fixmap(pmd_phys);
__pud_populate(pud, pmd_phys, PUD_TYPE_TABLE);
pmd_clear_fixmap();
pte_phys = pgtable_alloc();
__pmd_populate(pmd, pte_phys, PMD_TYPE_TABLE);
}
BUG_ON(pud_bad(*pud));
BUG_ON(pmd_bad(*pmd));
do {
pgprot_t __prot = prot;
next = pte_cont_addr_end(addr, end);
/* use a contiguous mapping if the range is suitably aligned */
if ((((addr | next | phys) & ~CONT_PTE_MASK) == 0) &&
(flags & NO_CONT_MAPPINGS) == 0)
__prot = __pgprot(pgprot_val(prot) | PTE_CONT);
init_pte(pmd, addr, next, phys, __prot);
phys += next - addr;
} while (addr = next, addr != end);
}
static void init_pmd(pud_t *pud, unsigned long addr, unsigned long end,
phys_addr_t phys, pgprot_t prot,
phys_addr_t (*pgtable_alloc)(void), int flags)
{
unsigned long next;
pmd_t *pmd;
pmd = pmd_set_fixmap_offset(pud, addr);
do {
@ -172,7 +190,7 @@ static void alloc_init_pmd(pud_t *pud, unsigned long addr, unsigned long end,
/* try section mapping first */
if (((addr | next | phys) & ~SECTION_MASK) == 0 &&
!page_mappings_only) {
(flags & NO_BLOCK_MAPPINGS) == 0) {
pmd_set_huge(pmd, phys, prot);
/*
@ -182,8 +200,8 @@ static void alloc_init_pmd(pud_t *pud, unsigned long addr, unsigned long end,
BUG_ON(!pgattr_change_is_safe(pmd_val(old_pmd),
pmd_val(*pmd)));
} else {
alloc_init_pte(pmd, addr, next, __phys_to_pfn(phys),
prot, pgtable_alloc);
alloc_init_cont_pte(pmd, addr, next, phys, prot,
pgtable_alloc, flags);
BUG_ON(pmd_val(old_pmd) != 0 &&
pmd_val(old_pmd) != pmd_val(*pmd));
@ -194,6 +212,41 @@ static void alloc_init_pmd(pud_t *pud, unsigned long addr, unsigned long end,
pmd_clear_fixmap();
}
static void alloc_init_cont_pmd(pud_t *pud, unsigned long addr,
unsigned long end, phys_addr_t phys,
pgprot_t prot,
phys_addr_t (*pgtable_alloc)(void), int flags)
{
unsigned long next;
/*
* Check for initial section mappings in the pgd/pud.
*/
BUG_ON(pud_sect(*pud));
if (pud_none(*pud)) {
phys_addr_t pmd_phys;
BUG_ON(!pgtable_alloc);
pmd_phys = pgtable_alloc();
__pud_populate(pud, pmd_phys, PUD_TYPE_TABLE);
}
BUG_ON(pud_bad(*pud));
do {
pgprot_t __prot = prot;
next = pmd_cont_addr_end(addr, end);
/* use a contiguous mapping if the range is suitably aligned */
if ((((addr | next | phys) & ~CONT_PMD_MASK) == 0) &&
(flags & NO_CONT_MAPPINGS) == 0)
__prot = __pgprot(pgprot_val(prot) | PTE_CONT);
init_pmd(pud, addr, next, phys, __prot, pgtable_alloc, flags);
phys += next - addr;
} while (addr = next, addr != end);
}
static inline bool use_1G_block(unsigned long addr, unsigned long next,
unsigned long phys)
{
@ -209,7 +262,7 @@ static inline bool use_1G_block(unsigned long addr, unsigned long next,
static void alloc_init_pud(pgd_t *pgd, unsigned long addr, unsigned long end,
phys_addr_t phys, pgprot_t prot,
phys_addr_t (*pgtable_alloc)(void),
bool page_mappings_only)
int flags)
{
pud_t *pud;
unsigned long next;
@ -231,7 +284,8 @@ static void alloc_init_pud(pgd_t *pgd, unsigned long addr, unsigned long end,
/*
* For 4K granule only, attempt to put down a 1GB block
*/
if (use_1G_block(addr, next, phys) && !page_mappings_only) {
if (use_1G_block(addr, next, phys) &&
(flags & NO_BLOCK_MAPPINGS) == 0) {
pud_set_huge(pud, phys, prot);
/*
@ -241,8 +295,8 @@ static void alloc_init_pud(pgd_t *pgd, unsigned long addr, unsigned long end,
BUG_ON(!pgattr_change_is_safe(pud_val(old_pud),
pud_val(*pud)));
} else {
alloc_init_pmd(pud, addr, next, phys, prot,
pgtable_alloc, page_mappings_only);
alloc_init_cont_pmd(pud, addr, next, phys, prot,
pgtable_alloc, flags);
BUG_ON(pud_val(old_pud) != 0 &&
pud_val(old_pud) != pud_val(*pud));
@ -257,7 +311,7 @@ static void __create_pgd_mapping(pgd_t *pgdir, phys_addr_t phys,
unsigned long virt, phys_addr_t size,
pgprot_t prot,
phys_addr_t (*pgtable_alloc)(void),
bool page_mappings_only)
int flags)
{
unsigned long addr, length, end, next;
pgd_t *pgd = pgd_offset_raw(pgdir, virt);
@ -277,7 +331,7 @@ static void __create_pgd_mapping(pgd_t *pgdir, phys_addr_t phys,
do {
next = pgd_addr_end(addr, end);
alloc_init_pud(pgd, addr, next, phys, prot, pgtable_alloc,
page_mappings_only);
flags);
phys += next - addr;
} while (pgd++, addr = next, addr != end);
}
@ -306,82 +360,80 @@ static void __init create_mapping_noalloc(phys_addr_t phys, unsigned long virt,
&phys, virt);
return;
}
__create_pgd_mapping(init_mm.pgd, phys, virt, size, prot, NULL, false);
__create_pgd_mapping(init_mm.pgd, phys, virt, size, prot, NULL,
NO_CONT_MAPPINGS);
}
void __init create_pgd_mapping(struct mm_struct *mm, phys_addr_t phys,
unsigned long virt, phys_addr_t size,
pgprot_t prot, bool page_mappings_only)
{
int flags = 0;
BUG_ON(mm == &init_mm);
if (page_mappings_only)
flags = NO_BLOCK_MAPPINGS | NO_CONT_MAPPINGS;
__create_pgd_mapping(mm->pgd, phys, virt, size, prot,
pgd_pgtable_alloc, page_mappings_only);
pgd_pgtable_alloc, flags);
}
static void create_mapping_late(phys_addr_t phys, unsigned long virt,
phys_addr_t size, pgprot_t prot)
static void update_mapping_prot(phys_addr_t phys, unsigned long virt,
phys_addr_t size, pgprot_t prot)
{
if (virt < VMALLOC_START) {
pr_warn("BUG: not creating mapping for %pa at 0x%016lx - outside kernel range\n",
pr_warn("BUG: not updating mapping for %pa at 0x%016lx - outside kernel range\n",
&phys, virt);
return;
}
__create_pgd_mapping(init_mm.pgd, phys, virt, size, prot,
NULL, debug_pagealloc_enabled());
__create_pgd_mapping(init_mm.pgd, phys, virt, size, prot, NULL,
NO_CONT_MAPPINGS);
/* flush the TLBs after updating live kernel mappings */
flush_tlb_kernel_range(virt, virt + size);
}
static void __init __map_memblock(pgd_t *pgd, phys_addr_t start, phys_addr_t end)
static void __init __map_memblock(pgd_t *pgd, phys_addr_t start,
phys_addr_t end, pgprot_t prot, int flags)
{
phys_addr_t kernel_start = __pa_symbol(_text);
phys_addr_t kernel_end = __pa_symbol(__init_begin);
__create_pgd_mapping(pgd, start, __phys_to_virt(start), end - start,
prot, early_pgtable_alloc, flags);
}
void __init mark_linear_text_alias_ro(void)
{
/*
* Take care not to create a writable alias for the
* read-only text and rodata sections of the kernel image.
* Remove the write permissions from the linear alias of .text/.rodata
*/
/* No overlap with the kernel text/rodata */
if (end < kernel_start || start >= kernel_end) {
__create_pgd_mapping(pgd, start, __phys_to_virt(start),
end - start, PAGE_KERNEL,
early_pgtable_alloc,
debug_pagealloc_enabled());
return;
}
/*
* This block overlaps the kernel text/rodata mappings.
* Map the portion(s) which don't overlap.
*/
if (start < kernel_start)
__create_pgd_mapping(pgd, start,
__phys_to_virt(start),
kernel_start - start, PAGE_KERNEL,
early_pgtable_alloc,
debug_pagealloc_enabled());
if (kernel_end < end)
__create_pgd_mapping(pgd, kernel_end,
__phys_to_virt(kernel_end),
end - kernel_end, PAGE_KERNEL,
early_pgtable_alloc,
debug_pagealloc_enabled());
/*
* Map the linear alias of the [_text, __init_begin) interval as
* read-only/non-executable. This makes the contents of the
* region accessible to subsystems such as hibernate, but
* protects it from inadvertent modification or execution.
*/
__create_pgd_mapping(pgd, kernel_start, __phys_to_virt(kernel_start),
kernel_end - kernel_start, PAGE_KERNEL_RO,
early_pgtable_alloc, debug_pagealloc_enabled());
update_mapping_prot(__pa_symbol(_text), (unsigned long)lm_alias(_text),
(unsigned long)__init_begin - (unsigned long)_text,
PAGE_KERNEL_RO);
}
static void __init map_mem(pgd_t *pgd)
{
phys_addr_t kernel_start = __pa_symbol(_text);
phys_addr_t kernel_end = __pa_symbol(__init_begin);
struct memblock_region *reg;
int flags = 0;
if (debug_pagealloc_enabled())
flags = NO_BLOCK_MAPPINGS | NO_CONT_MAPPINGS;
/*
* Take care not to create a writable alias for the
* read-only text and rodata sections of the kernel image.
* So temporarily mark them as NOMAP to skip mappings in
* the following for-loop
*/
memblock_mark_nomap(kernel_start, kernel_end - kernel_start);
#ifdef CONFIG_KEXEC_CORE
if (crashk_res.end)
memblock_mark_nomap(crashk_res.start,
resource_size(&crashk_res));
#endif
/* map all the memory banks */
for_each_memblock(memory, reg) {
@ -393,33 +445,57 @@ static void __init map_mem(pgd_t *pgd)
if (memblock_is_nomap(reg))
continue;
__map_memblock(pgd, start, end);
__map_memblock(pgd, start, end, PAGE_KERNEL, flags);
}
/*
* Map the linear alias of the [_text, __init_begin) interval
* as non-executable now, and remove the write permission in
* mark_linear_text_alias_ro() below (which will be called after
* alternative patching has completed). This makes the contents
* of the region accessible to subsystems such as hibernate,
* but protects it from inadvertent modification or execution.
* Note that contiguous mappings cannot be remapped in this way,
* so we should avoid them here.
*/
__map_memblock(pgd, kernel_start, kernel_end,
PAGE_KERNEL, NO_CONT_MAPPINGS);
memblock_clear_nomap(kernel_start, kernel_end - kernel_start);
#ifdef CONFIG_KEXEC_CORE
/*
* Use page-level mappings here so that we can shrink the region
* in page granularity and put back unused memory to buddy system
* through /sys/kernel/kexec_crash_size interface.
*/
if (crashk_res.end) {
__map_memblock(pgd, crashk_res.start, crashk_res.end + 1,
PAGE_KERNEL,
NO_BLOCK_MAPPINGS | NO_CONT_MAPPINGS);
memblock_clear_nomap(crashk_res.start,
resource_size(&crashk_res));
}
#endif
}
void mark_rodata_ro(void)
{
unsigned long section_size;
section_size = (unsigned long)_etext - (unsigned long)_text;
create_mapping_late(__pa_symbol(_text), (unsigned long)_text,
section_size, PAGE_KERNEL_ROX);
/*
* mark .rodata as read only. Use __init_begin rather than __end_rodata
* to cover NOTES and EXCEPTION_TABLE.
*/
section_size = (unsigned long)__init_begin - (unsigned long)__start_rodata;
create_mapping_late(__pa_symbol(__start_rodata), (unsigned long)__start_rodata,
update_mapping_prot(__pa_symbol(__start_rodata), (unsigned long)__start_rodata,
section_size, PAGE_KERNEL_RO);
/* flush the TLBs after updating live kernel mappings */
flush_tlb_all();
debug_checkwx();
}
static void __init map_kernel_segment(pgd_t *pgd, void *va_start, void *va_end,
pgprot_t prot, struct vm_struct *vma)
pgprot_t prot, struct vm_struct *vma,
int flags)
{
phys_addr_t pa_start = __pa_symbol(va_start);
unsigned long size = va_end - va_start;
@ -428,7 +504,7 @@ static void __init map_kernel_segment(pgd_t *pgd, void *va_start, void *va_end,
BUG_ON(!PAGE_ALIGNED(size));
__create_pgd_mapping(pgd, pa_start, (unsigned long)va_start, size, prot,
early_pgtable_alloc, debug_pagealloc_enabled());
early_pgtable_alloc, flags);
vma->addr = va_start;
vma->phys_addr = pa_start;
@ -439,18 +515,39 @@ static void __init map_kernel_segment(pgd_t *pgd, void *va_start, void *va_end,
vm_area_add_early(vma);
}
static int __init parse_rodata(char *arg)
{
return strtobool(arg, &rodata_enabled);
}
early_param("rodata", parse_rodata);
/*
* Create fine-grained mappings for the kernel.
*/
static void __init map_kernel(pgd_t *pgd)
{
static struct vm_struct vmlinux_text, vmlinux_rodata, vmlinux_init, vmlinux_data;
static struct vm_struct vmlinux_text, vmlinux_rodata, vmlinux_inittext,
vmlinux_initdata, vmlinux_data;
map_kernel_segment(pgd, _text, _etext, PAGE_KERNEL_EXEC, &vmlinux_text);
map_kernel_segment(pgd, __start_rodata, __init_begin, PAGE_KERNEL, &vmlinux_rodata);
map_kernel_segment(pgd, __init_begin, __init_end, PAGE_KERNEL_EXEC,
&vmlinux_init);
map_kernel_segment(pgd, _data, _end, PAGE_KERNEL, &vmlinux_data);
/*
* External debuggers may need to write directly to the text
* mapping to install SW breakpoints. Allow this (only) when
* explicitly requested with rodata=off.
*/
pgprot_t text_prot = rodata_enabled ? PAGE_KERNEL_ROX : PAGE_KERNEL_EXEC;
/*
* Only rodata will be remapped with different permissions later on,
* all other segments are allowed to use contiguous mappings.
*/
map_kernel_segment(pgd, _text, _etext, text_prot, &vmlinux_text, 0);
map_kernel_segment(pgd, __start_rodata, __inittext_begin, PAGE_KERNEL,
&vmlinux_rodata, NO_CONT_MAPPINGS);
map_kernel_segment(pgd, __inittext_begin, __inittext_end, text_prot,
&vmlinux_inittext, 0);
map_kernel_segment(pgd, __initdata_begin, __initdata_end, PAGE_KERNEL,
&vmlinux_initdata, 0);
map_kernel_segment(pgd, _data, _end, PAGE_KERNEL, &vmlinux_data, 0);
if (!pgd_val(*pgd_offset_raw(pgd, FIXADDR_START))) {
/*

15
arch/arm64/mm/pageattr.c
View File

@ -125,20 +125,23 @@ int set_memory_x(unsigned long addr, int numpages)
}
EXPORT_SYMBOL_GPL(set_memory_x);
#ifdef CONFIG_DEBUG_PAGEALLOC
void __kernel_map_pages(struct page *page, int numpages, int enable)
int set_memory_valid(unsigned long addr, int numpages, int enable)
{
unsigned long addr = (unsigned long) page_address(page);
if (enable)
__change_memory_common(addr, PAGE_SIZE * numpages,
return __change_memory_common(addr, PAGE_SIZE * numpages,
__pgprot(PTE_VALID),
__pgprot(0));
else
__change_memory_common(addr, PAGE_SIZE * numpages,
return __change_memory_common(addr, PAGE_SIZE * numpages,
__pgprot(0),
__pgprot(PTE_VALID));
}
#ifdef CONFIG_DEBUG_PAGEALLOC
void __kernel_map_pages(struct page *page, int numpages, int enable)
{
set_memory_valid((unsigned long)page_address(page), numpages, enable);
}
#ifdef CONFIG_HIBERNATION
/*
* When built with CONFIG_DEBUG_PAGEALLOC and CONFIG_HIBERNATION, this function

158
drivers/acpi/arm64/iort.c
View File

@ -225,7 +225,7 @@ static struct acpi_iort_node *iort_scan_node(enum acpi_iort_node_type type,
if (iort_node->type == type &&
ACPI_SUCCESS(callback(iort_node, context)))
return iort_node;
return iort_node;
iort_node = ACPI_ADD_PTR(struct acpi_iort_node, iort_node,
iort_node->length);
@ -253,17 +253,15 @@ static acpi_status iort_match_node_callback(struct acpi_iort_node *node,
void *context)
{
struct device *dev = context;
acpi_status status;
acpi_status status = AE_NOT_FOUND;
if (node->type == ACPI_IORT_NODE_NAMED_COMPONENT) {
struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER, NULL };
struct acpi_device *adev = to_acpi_device_node(dev->fwnode);
struct acpi_iort_named_component *ncomp;
if (!adev) {
status = AE_NOT_FOUND;
if (!adev)
goto out;
}
status = acpi_get_name(adev->handle, ACPI_FULL_PATHNAME, &buf);
if (ACPI_FAILURE(status)) {
@ -289,8 +287,6 @@ static acpi_status iort_match_node_callback(struct acpi_iort_node *node,
*/
status = pci_rc->pci_segment_number == pci_domain_nr(bus) ?
AE_OK : AE_NOT_FOUND;
} else {
status = AE_NOT_FOUND;
}
out:
return status;
@ -322,8 +318,7 @@ static int iort_id_map(struct acpi_iort_id_mapping *map, u8 type, u32 rid_in,
static
struct acpi_iort_node *iort_node_get_id(struct acpi_iort_node *node,
u32 *id_out, u8 type_mask,
int index)
u32 *id_out, int index)
{
struct acpi_iort_node *parent;
struct acpi_iort_id_mapping *map;
@ -345,9 +340,6 @@ struct acpi_iort_node *iort_node_get_id(struct acpi_iort_node *node,
parent = ACPI_ADD_PTR(struct acpi_iort_node, iort_table,
map->output_reference);
if (!(IORT_TYPE_MASK(parent->type) & type_mask))
return NULL;
if (map->flags & ACPI_IORT_ID_SINGLE_MAPPING) {
if (node->type == ACPI_IORT_NODE_NAMED_COMPONENT ||
node->type == ACPI_IORT_NODE_PCI_ROOT_COMPLEX) {
@ -359,11 +351,11 @@ struct acpi_iort_node *iort_node_get_id(struct acpi_iort_node *node,
return NULL;
}
static struct acpi_iort_node *iort_node_map_rid(struct acpi_iort_node *node,
u32 rid_in, u32 *rid_out,
u8 type_mask)
static struct acpi_iort_node *iort_node_map_id(struct acpi_iort_node *node,
u32 id_in, u32 *id_out,
u8 type_mask)
{
u32 rid = rid_in;
u32 id = id_in;
/* Parse the ID mapping tree to find specified node type */
while (node) {
@ -371,8 +363,8 @@ static struct acpi_iort_node *iort_node_map_rid(struct acpi_iort_node *node,
int i;
if (IORT_TYPE_MASK(node->type) & type_mask) {
if (rid_out)
*rid_out = rid;
if (id_out)
*id_out = id;
return node;
}
@ -389,9 +381,9 @@ static struct acpi_iort_node *iort_node_map_rid(struct acpi_iort_node *node,
goto fail_map;
}
/* Do the RID translation */
/* Do the ID translation */
for (i = 0; i < node->mapping_count; i++, map++) {
if (!iort_id_map(map, node->type, rid, &rid))
if (!iort_id_map(map, node->type, id, &id))
break;
}
@ -403,13 +395,41 @@ static struct acpi_iort_node *iort_node_map_rid(struct acpi_iort_node *node,
}
fail_map:
/* Map input RID to output RID unchanged on mapping failure*/
if (rid_out)
*rid_out = rid_in;
/* Map input ID to output ID unchanged on mapping failure */
if (id_out)
*id_out = id_in;
return NULL;
}
static
struct acpi_iort_node *iort_node_map_platform_id(struct acpi_iort_node *node,
u32 *id_out, u8 type_mask,
int index)
{
struct acpi_iort_node *parent;
u32 id;
/* step 1: retrieve the initial dev id */
parent = iort_node_get_id(node, &id, index);
if (!parent)
return NULL;
/*
* optional step 2: map the initial dev id if its parent is not
* the target type we want, map it again for the use cases such
* as NC (named component) -> SMMU -> ITS. If the type is matched,
* return the initial dev id and its parent pointer directly.
*/
if (!(IORT_TYPE_MASK(parent->type) & type_mask))
parent = iort_node_map_id(parent, id, id_out, type_mask);
else
if (id_out)
*id_out = id;
return parent;
}
static struct acpi_iort_node *iort_find_dev_node(struct device *dev)
{
struct pci_bus *pbus;
@ -443,13 +463,38 @@ u32 iort_msi_map_rid(struct device *dev, u32 req_id)
if (!node)
return req_id;
iort_node_map_rid(node, req_id, &dev_id, IORT_MSI_TYPE);
iort_node_map_id(node, req_id, &dev_id, IORT_MSI_TYPE);
return dev_id;
}
/**
* iort_pmsi_get_dev_id() - Get the device id for a device
* @dev: The device for which the mapping is to be done.
* @dev_id: The device ID found.
*
* Returns: 0 for successful find a dev id, -ENODEV on error
*/
int iort_pmsi_get_dev_id(struct device *dev, u32 *dev_id)
{
int i;
struct acpi_iort_node *node;
node = iort_find_dev_node(dev);
if (!node)
return -ENODEV;
for (i = 0; i < node->mapping_count; i++) {
if (iort_node_map_platform_id(node, dev_id, IORT_MSI_TYPE, i))
return 0;
}
return -ENODEV;
}
/**
* iort_dev_find_its_id() - Find the ITS identifier for a device
* @dev: The device.
* @req_id: Device's requester ID
* @idx: Index of the ITS identifier list.
* @its_id: ITS identifier.
*
@ -465,7 +510,7 @@ static int iort_dev_find_its_id(struct device *dev, u32 req_id,
if (!node)
return -ENXIO;
node = iort_node_map_rid(node, req_id, NULL, IORT_MSI_TYPE);
node = iort_node_map_id(node, req_id, NULL, IORT_MSI_TYPE);
if (!node)
return -ENXIO;
@ -503,6 +548,56 @@ struct irq_domain *iort_get_device_domain(struct device *dev, u32 req_id)
return irq_find_matching_fwnode(handle, DOMAIN_BUS_PCI_MSI);
}
/**
* iort_get_platform_device_domain() - Find MSI domain related to a
* platform device
* @dev: the dev pointer associated with the platform device
*
* Returns: the MSI domain for this device, NULL otherwise
*/
static struct irq_domain *iort_get_platform_device_domain(struct device *dev)
{
struct acpi_iort_node *node, *msi_parent;
struct fwnode_handle *iort_fwnode;
struct acpi_iort_its_group *its;
int i;
/* find its associated iort node */
node = iort_scan_node(ACPI_IORT_NODE_NAMED_COMPONENT,
iort_match_node_callback, dev);
if (!node)
return NULL;
/* then find its msi parent node */
for (i = 0; i < node->mapping_count; i++) {
msi_parent = iort_node_map_platform_id(node, NULL,
IORT_MSI_TYPE, i);
if (msi_parent)
break;
}
if (!msi_parent)
return NULL;
/* Move to ITS specific data */
its = (struct acpi_iort_its_group *)msi_parent->node_data;
iort_fwnode = iort_find_domain_token(its->identifiers[0]);
if (!iort_fwnode)
return NULL;
return irq_find_matching_fwnode(iort_fwnode, DOMAIN_BUS_PLATFORM_MSI);
}
void acpi_configure_pmsi_domain(struct device *dev)
{
struct irq_domain *msi_domain;
msi_domain = iort_get_platform_device_domain(dev);
if (msi_domain)
dev_set_msi_domain(dev, msi_domain);
}
static int __get_pci_rid(struct pci_dev *pdev, u16 alias, void *data)
{
u32 *rid = data;
@ -594,8 +689,8 @@ const struct iommu_ops *iort_iommu_configure(struct device *dev)
if (!node)
return NULL;
parent = iort_node_map_rid(node, rid, &streamid,
IORT_IOMMU_TYPE);
parent = iort_node_map_id(node, rid, &streamid,
IORT_IOMMU_TYPE);
ops = iort_iommu_xlate(dev, parent, streamid);
@ -607,14 +702,15 @@ const struct iommu_ops *iort_iommu_configure(struct device *dev)
if (!node)
return NULL;
parent = iort_node_get_id(node, &streamid,
IORT_IOMMU_TYPE, i++);
parent = iort_node_map_platform_id(node, &streamid,
IORT_IOMMU_TYPE, i++);
while (parent) {
ops = iort_iommu_xlate(dev, parent, streamid);
parent = iort_node_get_id(node, &streamid,
IORT_IOMMU_TYPE, i++);
parent = iort_node_map_platform_id(node, &streamid,
IORT_IOMMU_TYPE,
i++);
}
}

6
drivers/acpi/glue.c
View File

@ -6,6 +6,8 @@
*
* This file is released under the GPLv2.
*/
#include <linux/acpi_iort.h>
#include <linux/export.h>
#include <linux/init.h>
#include <linux/list.h>
@ -14,6 +16,7 @@
#include <linux/rwsem.h>
#include <linux/acpi.h>
#include <linux/dma-mapping.h>
#include <linux/platform_device.h>
#include "internal.h"
@ -322,6 +325,9 @@ static int acpi_platform_notify(struct device *dev)
if (!adev)
goto out;
if (dev->bus == &platform_bus_type)
acpi_configure_pmsi_domain(dev);
if (type && type->setup)
type->setup(dev);
else if (adev->handler && adev->handler->bind)

28
drivers/firmware/efi/libstub/fdt.c
View File

@ -16,6 +16,22 @@
#include "efistub.h"
#define EFI_DT_ADDR_CELLS_DEFAULT 2
#define EFI_DT_SIZE_CELLS_DEFAULT 2
static void fdt_update_cell_size(efi_system_table_t *sys_table, void *fdt)
{
int offset;
offset = fdt_path_offset(fdt, "/");
/* Set the #address-cells and #size-cells values for an empty tree */
fdt_setprop_u32(fdt, offset, "#address-cells",
EFI_DT_ADDR_CELLS_DEFAULT);
fdt_setprop_u32(fdt, offset, "#size-cells", EFI_DT_SIZE_CELLS_DEFAULT);
}
static efi_status_t update_fdt(efi_system_table_t *sys_table, void *orig_fdt,
unsigned long orig_fdt_size,
void *fdt, int new_fdt_size, char *cmdline_ptr,
@ -42,10 +58,18 @@ static efi_status_t update_fdt(efi_system_table_t *sys_table, void *orig_fdt,
}
}
if (orig_fdt)
if (orig_fdt) {
status = fdt_open_into(orig_fdt, fdt, new_fdt_size);
else
} else {
status = fdt_create_empty_tree(fdt, new_fdt_size);
if (status == 0) {
/*
* Any failure from the following function is non
* critical
*/
fdt_update_cell_size(sys_table, fdt);
}
}
if (status != 0)
goto fdt_set_fail;

14
drivers/perf/Kconfig
View File

@ -12,6 +12,10 @@ config ARM_PMU
Say y if you want to use CPU performance monitors on ARM-based
systems.
config ARM_PMU_ACPI
depends on ARM_PMU && ACPI
def_bool y
config QCOM_L2_PMU
bool "Qualcomm Technologies L2-cache PMU"
depends on ARCH_QCOM && ARM64 && PERF_EVENTS && ACPI
@ -21,6 +25,16 @@ config QCOM_L2_PMU
Adds the L2 cache PMU into the perf events subsystem for
monitoring L2 cache events.
config QCOM_L3_PMU
bool "Qualcomm Technologies L3-cache PMU"
depends on ARCH_QCOM && ARM64 && PERF_EVENTS && ACPI
select QCOM_IRQ_COMBINER
help
Provides support for the L3 cache performance monitor unit (PMU)
in Qualcomm Technologies processors.
Adds the L3 cache PMU into the perf events subsystem for
monitoring L3 cache events.
config XGENE_PMU
depends on PERF_EVENTS && ARCH_XGENE
bool "APM X-Gene SoC PMU"

4
drivers/perf/Makefile
View File

@ -1,3 +1,5 @@
obj-$(CONFIG_ARM_PMU) += arm_pmu.o
obj-$(CONFIG_ARM_PMU) += arm_pmu.o arm_pmu_platform.o
obj-$(CONFIG_ARM_PMU_ACPI) += arm_pmu_acpi.o
obj-$(CONFIG_QCOM_L2_PMU) += qcom_l2_pmu.o
obj-$(CONFIG_QCOM_L3_PMU) += qcom_l3_pmu.o
obj-$(CONFIG_XGENE_PMU) += xgene_pmu.o

544
drivers/perf/arm_pmu.c
View File

@ -16,7 +16,6 @@
#include <linux/cpu_pm.h>
#include <linux/export.h>
#include <linux/kernel.h>
#include <linux/of_device.h>
#include <linux/perf/arm_pmu.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
@ -25,7 +24,6 @@
#include <linux/irq.h>
#include <linux/irqdesc.h>
#include <asm/cputype.h>
#include <asm/irq_regs.h>
static int
@ -235,20 +233,15 @@ armpmu_add(struct perf_event *event, int flags)
struct pmu_hw_events *hw_events = this_cpu_ptr(armpmu->hw_events);
struct hw_perf_event *hwc = &event->hw;
int idx;
int err = 0;
/* An event following a process won't be stopped earlier */
if (!cpumask_test_cpu(smp_processor_id(), &armpmu->supported_cpus))
return -ENOENT;
perf_pmu_disable(event->pmu);
/* If we don't have a space for the counter then finish early. */
idx = armpmu->get_event_idx(hw_events, event);
if (idx < 0) {
err = idx;
goto out;
}
if (idx < 0)
return idx;
/*
* If there is an event in the counter we are going to use then make
@ -265,9 +258,7 @@ armpmu_add(struct perf_event *event, int flags)
/* Propagate our changes to the userspace mapping. */
perf_event_update_userpage(event);
out:
perf_pmu_enable(event->pmu);
return err;
return 0;
}
static int
@ -323,10 +314,16 @@ validate_group(struct perf_event *event)
return 0;
}
static struct arm_pmu_platdata *armpmu_get_platdata(struct arm_pmu *armpmu)
{
struct platform_device *pdev = armpmu->plat_device;
return pdev ? dev_get_platdata(&pdev->dev) : NULL;
}
static irqreturn_t armpmu_dispatch_irq(int irq, void *dev)
{
struct arm_pmu *armpmu;
struct platform_device *plat_device;
struct arm_pmu_platdata *plat;
int ret;
u64 start_clock, finish_clock;
@ -338,8 +335,8 @@ static irqreturn_t armpmu_dispatch_irq(int irq, void *dev)
* dereference.
*/
armpmu = *(void **)dev;
plat_device = armpmu->plat_device;
plat = dev_get_platdata(&plat_device->dev);
plat = armpmu_get_platdata(armpmu);
start_clock = sched_clock();
if (plat && plat->handle_irq)
@ -352,37 +349,6 @@ static irqreturn_t armpmu_dispatch_irq(int irq, void *dev)
return ret;
}
static void
armpmu_release_hardware(struct arm_pmu *armpmu)
{
armpmu->free_irq(armpmu);
}
static int
armpmu_reserve_hardware(struct arm_pmu *armpmu)
{
int err = armpmu->request_irq(armpmu, armpmu_dispatch_irq);
if (err) {
armpmu_release_hardware(armpmu);
return err;
}
return 0;
}
static void
hw_perf_event_destroy(struct perf_event *event)
{
struct arm_pmu *armpmu = to_arm_pmu(event->pmu);
atomic_t *active_events = &armpmu->active_events;
struct mutex *pmu_reserve_mutex = &armpmu->reserve_mutex;
if (atomic_dec_and_mutex_lock(active_events, pmu_reserve_mutex)) {
armpmu_release_hardware(armpmu);
mutex_unlock(pmu_reserve_mutex);
}
}
static int
event_requires_mode_exclusion(struct perf_event_attr *attr)
{
@ -455,8 +421,6 @@ __hw_perf_event_init(struct perf_event *event)
static int armpmu_event_init(struct perf_event *event)
{
struct arm_pmu *armpmu = to_arm_pmu(event->pmu);
int err = 0;
atomic_t *active_events = &armpmu->active_events;
/*
* Reject CPU-affine events for CPUs that are of a different class to
@ -476,26 +440,7 @@ static int armpmu_event_init(struct perf_event *event)
if (armpmu->map_event(event) == -ENOENT)
return -ENOENT;
event->destroy = hw_perf_event_destroy;
if (!atomic_inc_not_zero(active_events)) {
mutex_lock(&armpmu->reserve_mutex);
if (atomic_read(active_events) == 0)
err = armpmu_reserve_hardware(armpmu);
if (!err)
atomic_inc(active_events);
mutex_unlock(&armpmu->reserve_mutex);
}
if (err)
return err;
err = __hw_perf_event_init(event);
if (err)
hw_perf_event_destroy(event);
return err;
return __hw_perf_event_init(event);
}
static void armpmu_enable(struct pmu *pmu)
@ -553,27 +498,6 @@ static struct attribute_group armpmu_common_attr_group = {
.attrs = armpmu_common_attrs,
};
static void armpmu_init(struct arm_pmu *armpmu)
{
atomic_set(&armpmu->active_events, 0);
mutex_init(&armpmu->reserve_mutex);
armpmu->pmu = (struct pmu) {
.pmu_enable = armpmu_enable,
.pmu_disable = armpmu_disable,
.event_init = armpmu_event_init,
.add = armpmu_add,
.del = armpmu_del,
.start = armpmu_start,
.stop = armpmu_stop,
.read = armpmu_read,
.filter_match = armpmu_filter_match,
.attr_groups = armpmu->attr_groups,
};
armpmu->attr_groups[ARMPMU_ATTR_GROUP_COMMON] =
&armpmu_common_attr_group;
}
/* Set at runtime when we know what CPU type we are. */
static struct arm_pmu *__oprofile_cpu_pmu;
@ -601,115 +525,87 @@ int perf_num_counters(void)
}
EXPORT_SYMBOL_GPL(perf_num_counters);
static void cpu_pmu_enable_percpu_irq(void *data)
void armpmu_free_irq(struct arm_pmu *armpmu, int cpu)
{
int irq = *(int *)data;
struct pmu_hw_events __percpu *hw_events = armpmu->hw_events;
int irq = per_cpu(hw_events->irq, cpu);
enable_percpu_irq(irq, IRQ_TYPE_NONE);
}
if (!cpumask_test_and_clear_cpu(cpu, &armpmu->active_irqs))
return;
static void cpu_pmu_disable_percpu_irq(void *data)
{
int irq = *(int *)data;
disable_percpu_irq(irq);
}
static void cpu_pmu_free_irq(struct arm_pmu *cpu_pmu)
{
int i, irq, irqs;
struct platform_device *pmu_device = cpu_pmu->plat_device;
struct pmu_hw_events __percpu *hw_events = cpu_pmu->hw_events;
irqs = min(pmu_device->num_resources, num_possible_cpus());
irq = platform_get_irq(pmu_device, 0);
if (irq > 0 && irq_is_percpu(irq)) {
on_each_cpu_mask(&cpu_pmu->supported_cpus,
cpu_pmu_disable_percpu_irq, &irq, 1);
if (irq_is_percpu(irq)) {
free_percpu_irq(irq, &hw_events->percpu_pmu);
} else {
for (i = 0; i < irqs; ++i) {
int cpu = i;
if (cpu_pmu->irq_affinity)
cpu = cpu_pmu->irq_affinity[i];
if (!cpumask_test_and_clear_cpu(cpu, &cpu_pmu->active_irqs))
continue;
irq = platform_get_irq(pmu_device, i);
if (irq > 0)
free_irq(irq, per_cpu_ptr(&hw_events->percpu_pmu, cpu));
}
cpumask_clear(&armpmu->active_irqs);
return;
}
free_irq(irq, per_cpu_ptr(&hw_events->percpu_pmu, cpu));
}
static int cpu_pmu_request_irq(struct arm_pmu *cpu_pmu, irq_handler_t handler)
void armpmu_free_irqs(struct arm_pmu *armpmu)
{
int i, err, irq, irqs;
struct platform_device *pmu_device = cpu_pmu->plat_device;
struct pmu_hw_events __percpu *hw_events = cpu_pmu->hw_events;
int cpu;
if (!pmu_device)
return -ENODEV;
for_each_cpu(cpu, &armpmu->supported_cpus)
armpmu_free_irq(armpmu, cpu);
}
irqs = min(pmu_device->num_resources, num_possible_cpus());
if (irqs < 1) {
pr_warn_once("perf/ARM: No irqs for PMU defined, sampling events not supported\n");
int armpmu_request_irq(struct arm_pmu *armpmu, int cpu)
{
int err = 0;
struct pmu_hw_events __percpu *hw_events = armpmu->hw_events;
const irq_handler_t handler = armpmu_dispatch_irq;
int irq = per_cpu(hw_events->irq, cpu);
if (!irq)
return 0;
}
irq = platform_get_irq(pmu_device, 0);
if (irq > 0 && irq_is_percpu(irq)) {
if (irq_is_percpu(irq) && cpumask_empty(&armpmu->active_irqs)) {
err = request_percpu_irq(irq, handler, "arm-pmu",
&hw_events->percpu_pmu);
if (err) {
pr_err("unable to request IRQ%d for ARM PMU counters\n",
irq);
return err;
}
} else if (irq_is_percpu(irq)) {
int other_cpu = cpumask_first(&armpmu->active_irqs);
int other_irq = per_cpu(hw_events->irq, other_cpu);
on_each_cpu_mask(&cpu_pmu->supported_cpus,
cpu_pmu_enable_percpu_irq, &irq, 1);
if (irq != other_irq) {
pr_warn("mismatched PPIs detected.\n");
err = -EINVAL;
}
} else {
for (i = 0; i < irqs; ++i) {
int cpu = i;
err = 0;
irq = platform_get_irq(pmu_device, i);
if (irq < 0)
continue;
if (cpu_pmu->irq_affinity)
cpu = cpu_pmu->irq_affinity[i];
/*
* If we have a single PMU interrupt that we can't shift,
* assume that we're running on a uniprocessor machine and
* continue. Otherwise, continue without this interrupt.
*/
if (irq_set_affinity(irq, cpumask_of(cpu)) && irqs > 1) {
pr_warn("unable to set irq affinity (irq=%d, cpu=%u)\n",
irq, cpu);
continue;
}
err = request_irq(irq, handler,
IRQF_NOBALANCING | IRQF_NO_THREAD, "arm-pmu",
per_cpu_ptr(&hw_events->percpu_pmu, cpu));
if (err) {
pr_err("unable to request IRQ%d for ARM PMU counters\n",
irq);
return err;
}
cpumask_set_cpu(cpu, &cpu_pmu->active_irqs);
}
err = request_irq(irq, handler,
IRQF_NOBALANCING | IRQF_NO_THREAD, "arm-pmu",
per_cpu_ptr(&hw_events->percpu_pmu, cpu));
}
if (err) {
pr_err("unable to request IRQ%d for ARM PMU counters\n",
irq);
return err;
}
cpumask_set_cpu(cpu, &armpmu->active_irqs);
return 0;
}
int armpmu_request_irqs(struct arm_pmu *armpmu)
{
int cpu, err;
for_each_cpu(cpu, &armpmu->supported_cpus) {
err = armpmu_request_irq(armpmu, cpu);
if (err)
break;
}
return err;
}
static int armpmu_get_cpu_irq(struct arm_pmu *pmu, int cpu)
{
struct pmu_hw_events __percpu *hw_events = pmu->hw_events;
return per_cpu(hw_events->irq, cpu);
}
/*
* PMU hardware loses all context when a CPU goes offline.
* When a CPU is hotplugged back in, since some hardware registers are
@ -719,11 +615,42 @@ static int cpu_pmu_request_irq(struct arm_pmu *cpu_pmu, irq_handler_t handler)
static int arm_perf_starting_cpu(unsigned int cpu, struct hlist_node *node)
{
struct arm_pmu *pmu = hlist_entry_safe(node, struct arm_pmu, node);
int irq;
if (!cpumask_test_cpu(cpu, &pmu->supported_cpus))
return 0;
if (pmu->reset)
pmu->reset(pmu);
irq = armpmu_get_cpu_irq(pmu, cpu);
if (irq) {
if (irq_is_percpu(irq)) {
enable_percpu_irq(irq, IRQ_TYPE_NONE);
return 0;
}
if (irq_force_affinity(irq, cpumask_of(cpu)) &&
num_possible_cpus() > 1) {
pr_warn("unable to set irq affinity (irq=%d, cpu=%u)\n",
irq, cpu);
}
}
return 0;
}
static int arm_perf_teardown_cpu(unsigned int cpu, struct hlist_node *node)
{
struct arm_pmu *pmu = hlist_entry_safe(node, struct arm_pmu, node);
int irq;
if (!cpumask_test_cpu(cpu, &pmu->supported_cpus))
return 0;
irq = armpmu_get_cpu_irq(pmu, cpu);
if (irq && irq_is_percpu(irq))
disable_percpu_irq(irq);
return 0;
}
@ -828,56 +755,22 @@ static inline void cpu_pm_pmu_unregister(struct arm_pmu *cpu_pmu) { }
static int cpu_pmu_init(struct arm_pmu *cpu_pmu)
{
int err;
int cpu;
struct pmu_hw_events __percpu *cpu_hw_events;
cpu_hw_events = alloc_percpu(struct pmu_hw_events);
if (!cpu_hw_events)
return -ENOMEM;
err = cpuhp_state_add_instance_nocalls(CPUHP_AP_PERF_ARM_STARTING,
&cpu_pmu->node);
err = cpuhp_state_add_instance(CPUHP_AP_PERF_ARM_STARTING,
&cpu_pmu->node);
if (err)
goto out_free;
goto out;
err = cpu_pm_pmu_register(cpu_pmu);
if (err)
goto out_unregister;
for_each_possible_cpu(cpu) {
struct pmu_hw_events *events = per_cpu_ptr(cpu_hw_events, cpu);
raw_spin_lock_init(&events->pmu_lock);
events->percpu_pmu = cpu_pmu;
}
cpu_pmu->hw_events = cpu_hw_events;
cpu_pmu->request_irq = cpu_pmu_request_irq;
cpu_pmu->free_irq = cpu_pmu_free_irq;
/* Ensure the PMU has sane values out of reset. */
if (cpu_pmu->reset)
on_each_cpu_mask(&cpu_pmu->supported_cpus, cpu_pmu->reset,
cpu_pmu, 1);
/* If no interrupts available, set the corresponding capability flag */
if (!platform_get_irq(cpu_pmu->plat_device, 0))
cpu_pmu->pmu.capabilities |= PERF_PMU_CAP_NO_INTERRUPT;
/*
* This is a CPU PMU potentially in a heterogeneous configuration (e.g.
* big.LITTLE). This is not an uncore PMU, and we have taken ctx
* sharing into account (e.g. with our pmu::filter_match callback and
* pmu::event_init group validation).
*/
cpu_pmu->pmu.capabilities |= PERF_PMU_CAP_HETEROGENEOUS_CPUS;
return 0;
out_unregister:
cpuhp_state_remove_instance_nocalls(CPUHP_AP_PERF_ARM_STARTING,
&cpu_pmu->node);
out_free:
free_percpu(cpu_hw_events);
out:
return err;
}
@ -886,177 +779,78 @@ static void cpu_pmu_destroy(struct arm_pmu *cpu_pmu)
cpu_pm_pmu_unregister(cpu_pmu);
cpuhp_state_remove_instance_nocalls(CPUHP_AP_PERF_ARM_STARTING,
&cpu_pmu->node);
free_percpu(cpu_pmu->hw_events);
}
/*
* CPU PMU identification and probing.
*/
static int probe_current_pmu(struct arm_pmu *pmu,
const struct pmu_probe_info *info)
struct arm_pmu *armpmu_alloc(void)
{
int cpu = get_cpu();
unsigned int cpuid = read_cpuid_id();
int ret = -ENODEV;
pr_info("probing PMU on CPU %d\n", cpu);
for (; info->init != NULL; info++) {
if ((cpuid & info->mask) != info->cpuid)
continue;
ret = info->init(pmu);
break;
}
put_cpu();
return ret;
}
static int of_pmu_irq_cfg(struct arm_pmu *pmu)
{
int *irqs, i = 0;
bool using_spi = false;
struct platform_device *pdev = pmu->plat_device;
irqs = kcalloc(pdev->num_resources, sizeof(*irqs), GFP_KERNEL);
if (!irqs)
return -ENOMEM;
do {
struct device_node *dn;
int cpu, irq;
/* See if we have an affinity entry */
dn = of_parse_phandle(pdev->dev.of_node, "interrupt-affinity", i);
if (!dn)
break;
/* Check the IRQ type and prohibit a mix of PPIs and SPIs */
irq = platform_get_irq(pdev, i);
if (irq > 0) {
bool spi = !irq_is_percpu(irq);
if (i > 0 && spi != using_spi) {
pr_err("PPI/SPI IRQ type mismatch for %s!\n",
dn->name);
of_node_put(dn);
kfree(irqs);
return -EINVAL;
}
using_spi = spi;
}
/* Now look up the logical CPU number */
for_each_possible_cpu(cpu) {
struct device_node *cpu_dn;
cpu_dn = of_cpu_device_node_get(cpu);
of_node_put(cpu_dn);
if (dn == cpu_dn)
break;
}
if (cpu >= nr_cpu_ids) {
pr_warn("Failed to find logical CPU for %s\n",
dn->name);
of_node_put(dn);
cpumask_setall(&pmu->supported_cpus);
break;
}
of_node_put(dn);
/* For SPIs, we need to track the affinity per IRQ */
if (using_spi) {
if (i >= pdev->num_resources)
break;
irqs[i] = cpu;
}
/* Keep track of the CPUs containing this PMU type */
cpumask_set_cpu(cpu, &pmu->supported_cpus);
i++;
} while (1);
/* If we didn't manage to parse anything, try the interrupt affinity */
if (cpumask_weight(&pmu->supported_cpus) == 0) {
int irq = platform_get_irq(pdev, 0);
if (irq > 0 && irq_is_percpu(irq)) {
/* If using PPIs, check the affinity of the partition */
int ret;
ret = irq_get_percpu_devid_partition(irq, &pmu->supported_cpus);
if (ret) {
kfree(irqs);
return ret;
}
} else {
/* Otherwise default to all CPUs */
cpumask_setall(&pmu->supported_cpus);
}
}
/* If we matched up the IRQ affinities, use them to route the SPIs */
if (using_spi && i == pdev->num_resources)
pmu->irq_affinity = irqs;
else
kfree(irqs);
return 0;
}
int arm_pmu_device_probe(struct platform_device *pdev,
const struct of_device_id *of_table,
const struct pmu_probe_info *probe_table)
{
const struct of_device_id *of_id;
const int (*init_fn)(struct arm_pmu *);
struct device_node *node = pdev->dev.of_node;
struct arm_pmu *pmu;
int ret = -ENODEV;
int cpu;
pmu = kzalloc(sizeof(struct arm_pmu), GFP_KERNEL);
pmu = kzalloc(sizeof(*pmu), GFP_KERNEL);
if (!pmu) {
pr_info("failed to allocate PMU device!\n");
return -ENOMEM;
goto out;
}
armpmu_init(pmu);
pmu->plat_device = pdev;
if (node && (of_id = of_match_node(of_table, pdev->dev.of_node))) {
init_fn = of_id->data;
pmu->secure_access = of_property_read_bool(pdev->dev.of_node,
"secure-reg-access");
/* arm64 systems boot only as non-secure */
if (IS_ENABLED(CONFIG_ARM64) && pmu->secure_access) {
pr_warn("ignoring \"secure-reg-access\" property for arm64\n");
pmu->secure_access = false;
}
ret = of_pmu_irq_cfg(pmu);
if (!ret)
ret = init_fn(pmu);
} else if (probe_table) {
cpumask_setall(&pmu->supported_cpus);
ret = probe_current_pmu(pmu, probe_table);
pmu->hw_events = alloc_percpu(struct pmu_hw_events);
if (!pmu->hw_events) {
pr_info("failed to allocate per-cpu PMU data.\n");
goto out_free_pmu;
}
if (ret) {
pr_info("%s: failed to probe PMU!\n", of_node_full_name(node));
goto out_free;
pmu->pmu = (struct pmu) {
.pmu_enable = armpmu_enable,
.pmu_disable = armpmu_disable,
.event_init = armpmu_event_init,
.add = armpmu_add,
.del = armpmu_del,
.start = armpmu_start,
.stop = armpmu_stop,
.read = armpmu_read,
.filter_match = armpmu_filter_match,
.attr_groups = pmu->attr_groups,
/*
* This is a CPU PMU potentially in a heterogeneous
* configuration (e.g. big.LITTLE). This is not an uncore PMU,
* and we have taken ctx sharing into account (e.g. with our
* pmu::filter_match callback and pmu::event_init group
* validation).
*/
.capabilities = PERF_PMU_CAP_HETEROGENEOUS_CPUS,
};
pmu->attr_groups[ARMPMU_ATTR_GROUP_COMMON] =
&armpmu_common_attr_group;
for_each_possible_cpu(cpu) {
struct pmu_hw_events *events;
events = per_cpu_ptr(pmu->hw_events, cpu);
raw_spin_lock_init(&events->pmu_lock);
events->percpu_pmu = pmu;
}
return pmu;
out_free_pmu:
kfree(pmu);
out:
return NULL;
}
void armpmu_free(struct arm_pmu *pmu)
{
free_percpu(pmu->hw_events);
kfree(pmu);
}
int armpmu_register(struct arm_pmu *pmu)
{
int ret;
ret = cpu_pmu_init(pmu);
if (ret)
goto out_free;
return ret;
ret = perf_pmu_register(&pmu->pmu, pmu->name, -1);
if (ret)
@ -1066,17 +860,12 @@ int arm_pmu_device_probe(struct platform_device *pdev,
__oprofile_cpu_pmu = pmu;
pr_info("enabled with %s PMU driver, %d counters available\n",
pmu->name, pmu->num_events);
pmu->name, pmu->num_events);
return 0;
out_destroy:
cpu_pmu_destroy(pmu);
out_free:
pr_info("%s: failed to register PMU devices!\n",
of_node_full_name(node));
kfree(pmu->irq_affinity);
kfree(pmu);
return ret;
}
@ -1086,7 +875,8 @@ static int arm_pmu_hp_init(void)
ret = cpuhp_setup_state_multi(CPUHP_AP_PERF_ARM_STARTING,
"perf/arm/pmu:starting",
arm_perf_starting_cpu, NULL);
arm_perf_starting_cpu,
arm_perf_teardown_cpu);
if (ret)
pr_err("CPU hotplug notifier for ARM PMU could not be registered: %d\n",
ret);

256
drivers/perf/arm_pmu_acpi.c Normal file
View File

@ -0,0 +1,256 @@
/*
* ACPI probing code for ARM performance counters.
*
* Copyright (C) 2017 ARM Ltd.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/acpi.h>
#include <linux/cpumask.h>
#include <linux/init.h>
#include <linux/percpu.h>
#include <linux/perf/arm_pmu.h>
#include <asm/cputype.h>
static DEFINE_PER_CPU(struct arm_pmu *, probed_pmus);
static DEFINE_PER_CPU(int, pmu_irqs);
static int arm_pmu_acpi_register_irq(int cpu)
{
struct acpi_madt_generic_interrupt *gicc;
int gsi, trigger;
gicc = acpi_cpu_get_madt_gicc(cpu);
if (WARN_ON(!gicc))
return -EINVAL;
gsi = gicc->performance_interrupt;
if (gicc->flags & ACPI_MADT_PERFORMANCE_IRQ_MODE)
trigger = ACPI_EDGE_SENSITIVE;
else
trigger = ACPI_LEVEL_SENSITIVE;
/*
* Helpfully, the MADT GICC doesn't have a polarity flag for the
* "performance interrupt". Luckily, on compliant GICs the polarity is
* a fixed value in HW (for both SPIs and PPIs) that we cannot change
* from SW.
*
* Here we pass in ACPI_ACTIVE_HIGH to keep the core code happy. This
* may not match the real polarity, but that should not matter.
*
* Other interrupt controllers are not supported with ACPI.
*/
return acpi_register_gsi(NULL, gsi, trigger, ACPI_ACTIVE_HIGH);
}
static void arm_pmu_acpi_unregister_irq(int cpu)
{
struct acpi_madt_generic_interrupt *gicc;
int gsi;
gicc = acpi_cpu_get_madt_gicc(cpu);
if (!gicc)
return;
gsi = gicc->performance_interrupt;
acpi_unregister_gsi(gsi);
}
static int arm_pmu_acpi_parse_irqs(void)
{
int irq, cpu, irq_cpu, err;
for_each_possible_cpu(cpu) {
irq = arm_pmu_acpi_register_irq(cpu);
if (irq < 0) {
err = irq;
pr_warn("Unable to parse ACPI PMU IRQ for CPU%d: %d\n",
cpu, err);
goto out_err;
} else if (irq == 0) {
pr_warn("No ACPI PMU IRQ for CPU%d\n", cpu);
}
per_cpu(pmu_irqs, cpu) = irq;
}
return 0;
out_err:
for_each_possible_cpu(cpu) {
irq = per_cpu(pmu_irqs, cpu);
if (!irq)
continue;
arm_pmu_acpi_unregister_irq(cpu);
/*
* Blat all copies of the IRQ so that we only unregister the
* corresponding GSI once (e.g. when we have PPIs).
*/
for_each_possible_cpu(irq_cpu) {
if (per_cpu(pmu_irqs, irq_cpu) == irq)
per_cpu(pmu_irqs, irq_cpu) = 0;
}
}
return err;
}
static struct arm_pmu *arm_pmu_acpi_find_alloc_pmu(void)
{
unsigned long cpuid = read_cpuid_id();
struct arm_pmu *pmu;
int cpu;
for_each_possible_cpu(cpu) {
pmu = per_cpu(probed_pmus, cpu);
if (!pmu || pmu->acpi_cpuid != cpuid)
continue;
return pmu;
}
pmu = armpmu_alloc();
if (!pmu) {
pr_warn("Unable to allocate PMU for CPU%d\n",
smp_processor_id());
return NULL;
}
pmu->acpi_cpuid = cpuid;
return pmu;
}
/*
* This must run before the common arm_pmu hotplug logic, so that we can
* associate a CPU and its interrupt before the common code tries to manage the
* affinity and so on.
*
* Note that hotplug events are serialized, so we cannot race with another CPU
* coming up. The perf core won't open events while a hotplug event is in
* progress.
*/
static int arm_pmu_acpi_cpu_starting(unsigned int cpu)
{
struct arm_pmu *pmu;
struct pmu_hw_events __percpu *hw_events;
int irq;
/* If we've already probed this CPU, we have nothing to do */
if (per_cpu(probed_pmus, cpu))
return 0;
irq = per_cpu(pmu_irqs, cpu);
pmu = arm_pmu_acpi_find_alloc_pmu();
if (!pmu)
return -ENOMEM;
cpumask_set_cpu(cpu, &pmu->supported_cpus);
per_cpu(probed_pmus, cpu) = pmu;
/*
* Log and request the IRQ so the core arm_pmu code can manage it. In
* some situations (e.g. mismatched PPIs), we may fail to request the
* IRQ. However, it may be too late for us to do anything about it.
* The common ARM PMU code will log a warning in this case.
*/
hw_events = pmu->hw_events;
per_cpu(hw_events->irq, cpu) = irq;
armpmu_request_irq(pmu, cpu);
/*
* Ideally, we'd probe the PMU here when we find the first matching
* CPU. We can't do that for several reasons; see the comment in
* arm_pmu_acpi_init().
*
* So for the time being, we're done.
*/
return 0;
}
int arm_pmu_acpi_probe(armpmu_init_fn init_fn)
{
int pmu_idx = 0;
int cpu, ret;
if (acpi_disabled)
return 0;
/*
* Initialise and register the set of PMUs which we know about right
* now. Ideally we'd do this in arm_pmu_acpi_cpu_starting() so that we
* could handle late hotplug, but this may lead to deadlock since we
* might try to register a hotplug notifier instance from within a
* hotplug notifier.
*
* There's also the problem of having access to the right init_fn,
* without tying this too deeply into the "real" PMU driver.
*
* For the moment, as with the platform/DT case, we need at least one
* of a PMU's CPUs to be online at probe time.
*/
for_each_possible_cpu(cpu) {
struct arm_pmu *pmu = per_cpu(probed_pmus, cpu);
char *base_name;
if (!pmu || pmu->name)
continue;
ret = init_fn(pmu);
if (ret == -ENODEV) {
/* PMU not handled by this driver, or not present */
continue;
} else if (ret) {
pr_warn("Unable to initialise PMU for CPU%d\n", cpu);
return ret;
}
base_name = pmu->name;
pmu->name = kasprintf(GFP_KERNEL, "%s_%d", base_name, pmu_idx++);
if (!pmu->name) {
pr_warn("Unable to allocate PMU name for CPU%d\n", cpu);
return -ENOMEM;
}
ret = armpmu_register(pmu);
if (ret) {
pr_warn("Failed to register PMU for CPU%d\n", cpu);
return ret;
}
}
return 0;
}
static int arm_pmu_acpi_init(void)
{
int ret;
if (acpi_disabled)
return 0;
/*
* We can't request IRQs yet, since we don't know the cookie value
* until we know which CPUs share the same logical PMU. We'll handle
* that in arm_pmu_acpi_cpu_starting().
*/
ret = arm_pmu_acpi_parse_irqs();
if (ret)
return ret;
ret = cpuhp_setup_state(CPUHP_AP_PERF_ARM_ACPI_STARTING,
"perf/arm/pmu_acpi:starting",
arm_pmu_acpi_cpu_starting, NULL);
return ret;
}
subsys_initcall(arm_pmu_acpi_init)

235
drivers/perf/arm_pmu_platform.c Normal file
View File

@ -0,0 +1,235 @@
/*
* platform_device probing code for ARM performance counters.
*
* Copyright (C) 2009 picoChip Designs, Ltd., Jamie Iles
* Copyright (C) 2010 ARM Ltd., Will Deacon <will.deacon@arm.com>
*/
#define pr_fmt(fmt) "hw perfevents: " fmt
#include <linux/bug.h>
#include <linux/cpumask.h>
#include <linux/device.h>
#include <linux/errno.h>
#include <linux/irq.h>
#include <linux/irqdesc.h>
#include <linux/kconfig.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/percpu.h>
#include <linux/perf/arm_pmu.h>
#include <linux/platform_device.h>
#include <linux/printk.h>
#include <linux/smp.h>
static int probe_current_pmu(struct arm_pmu *pmu,
const struct pmu_probe_info *info)
{
int cpu = get_cpu();
unsigned int cpuid = read_cpuid_id();
int ret = -ENODEV;
pr_info("probing PMU on CPU %d\n", cpu);
for (; info->init != NULL; info++) {
if ((cpuid & info->mask) != info->cpuid)
continue;
ret = info->init(pmu);
break;
}
put_cpu();
return ret;
}
static int pmu_parse_percpu_irq(struct arm_pmu *pmu, int irq)
{
int cpu, ret;
struct pmu_hw_events __percpu *hw_events = pmu->hw_events;
ret = irq_get_percpu_devid_partition(irq, &pmu->supported_cpus);
if (ret)
return ret;
for_each_cpu(cpu, &pmu->supported_cpus)
per_cpu(hw_events->irq, cpu) = irq;
return 0;
}
static bool pmu_has_irq_affinity(struct device_node *node)
{
return !!of_find_property(node, "interrupt-affinity", NULL);
}
static int pmu_parse_irq_affinity(struct device_node *node, int i)
{
struct device_node *dn;
int cpu;
/*
* If we don't have an interrupt-affinity property, we guess irq
* affinity matches our logical CPU order, as we used to assume.
* This is fragile, so we'll warn in pmu_parse_irqs().
*/
if (!pmu_has_irq_affinity(node))
return i;
dn = of_parse_phandle(node, "interrupt-affinity", i);
if (!dn) {
pr_warn("failed to parse interrupt-affinity[%d] for %s\n",
i, node->name);
return -EINVAL;
}
/* Now look up the logical CPU number */
for_each_possible_cpu(cpu) {
struct device_node *cpu_dn;
cpu_dn = of_cpu_device_node_get(cpu);
of_node_put(cpu_dn);
if (dn == cpu_dn)
break;
}
if (cpu >= nr_cpu_ids) {
pr_warn("failed to find logical CPU for %s\n", dn->name);
}
of_node_put(dn);
return cpu;
}
static int pmu_parse_irqs(struct arm_pmu *pmu)
{
int i = 0, num_irqs;
struct platform_device *pdev = pmu->plat_device;
struct pmu_hw_events __percpu *hw_events = pmu->hw_events;
num_irqs = platform_irq_count(pdev);
if (num_irqs < 0) {
pr_err("unable to count PMU IRQs\n");
return num_irqs;
}
/*
* In this case we have no idea which CPUs are covered by the PMU.
* To match our prior behaviour, we assume all CPUs in this case.
*/
if (num_irqs == 0) {
pr_warn("no irqs for PMU, sampling events not supported\n");
pmu->pmu.capabilities |= PERF_PMU_CAP_NO_INTERRUPT;
cpumask_setall(&pmu->supported_cpus);
return 0;
}
if (num_irqs == 1) {
int irq = platform_get_irq(pdev, 0);
if (irq && irq_is_percpu(irq))
return pmu_parse_percpu_irq(pmu, irq);
}
if (!pmu_has_irq_affinity(pdev->dev.of_node)) {
pr_warn("no interrupt-affinity property for %s, guessing.\n",
of_node_full_name(pdev->dev.of_node));
}
/*
* Some platforms have all PMU IRQs OR'd into a single IRQ, with a
* special platdata function that attempts to demux them.
*/
if (dev_get_platdata(&pdev->dev))
cpumask_setall(&pmu->supported_cpus);
for (i = 0; i < num_irqs; i++) {
int cpu, irq;
irq = platform_get_irq(pdev, i);
if (WARN_ON(irq <= 0))
continue;
if (irq_is_percpu(irq)) {
pr_warn("multiple PPIs or mismatched SPI/PPI detected\n");
return -EINVAL;
}
cpu = pmu_parse_irq_affinity(pdev->dev.of_node, i);
if (cpu < 0)
return cpu;
if (cpu >= nr_cpu_ids)
continue;
if (per_cpu(hw_events->irq, cpu)) {
pr_warn("multiple PMU IRQs for the same CPU detected\n");
return -EINVAL;
}
per_cpu(hw_events->irq, cpu) = irq;
cpumask_set_cpu(cpu, &pmu->supported_cpus);
}
return 0;
}
int arm_pmu_device_probe(struct platform_device *pdev,
const struct of_device_id *of_table,
const struct pmu_probe_info *probe_table)
{
const struct of_device_id *of_id;
armpmu_init_fn init_fn;
struct device_node *node = pdev->dev.of_node;
struct arm_pmu *pmu;
int ret = -ENODEV;
pmu = armpmu_alloc();
if (!pmu)
return -ENOMEM;
pmu->plat_device = pdev;
ret = pmu_parse_irqs(pmu);
if (ret)
goto out_free;
if (node && (of_id = of_match_node(of_table, pdev->dev.of_node))) {
init_fn = of_id->data;
pmu->secure_access = of_property_read_bool(pdev->dev.of_node,
"secure-reg-access");
/* arm64 systems boot only as non-secure */
if (IS_ENABLED(CONFIG_ARM64) && pmu->secure_access) {
pr_warn("ignoring \"secure-reg-access\" property for arm64\n");
pmu->secure_access = false;
}
ret = init_fn(pmu);
} else if (probe_table) {
cpumask_setall(&pmu->supported_cpus);
ret = probe_current_pmu(pmu, probe_table);
}
if (ret) {
pr_info("%s: failed to probe PMU!\n", of_node_full_name(node));
goto out_free;
}
ret = armpmu_request_irqs(pmu);
if (ret)
goto out_free_irqs;
ret = armpmu_register(pmu);
if (ret)
goto out_free;
return 0;
out_free_irqs:
armpmu_free_irqs(pmu);
out_free:
pr_info("%s: failed to register PMU devices!\n",
of_node_full_name(node));
armpmu_free(pmu);
return ret;
}

849
drivers/perf/qcom_l3_pmu.c Normal file
View File

@ -0,0 +1,849 @@
/*
* Driver for the L3 cache PMUs in Qualcomm Technologies chips.
*
* The driver supports a distributed cache architecture where the overall
* cache for a socket is comprised of multiple slices each with its own PMU.
* Access to each individual PMU is provided even though all CPUs share all
* the slices. User space needs to aggregate to individual counts to provide
* a global picture.
*
* See Documentation/perf/qcom_l3_pmu.txt for more details.
*
* Copyright (c) 2015-2017, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/acpi.h>
#include <linux/bitops.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/list.h>
#include <linux/module.h>
#include <linux/perf_event.h>
#include <linux/platform_device.h>
/*
* General constants
*/
/* Number of counters on each PMU */
#define L3_NUM_COUNTERS 8
/* Mask for the event type field within perf_event_attr.config and EVTYPE reg */
#define L3_EVTYPE_MASK 0xFF
/*
* Bit position of the 'long counter' flag within perf_event_attr.config.
* Reserve some space between the event type and this flag to allow expansion
* in the event type field.
*/
#define L3_EVENT_LC_BIT 32
/*
* Register offsets
*/
/* Perfmon registers */
#define L3_HML3_PM_CR 0x000
#define L3_HML3_PM_EVCNTR(__cntr) (0x420 + ((__cntr) & 0x7) * 8)
#define L3_HML3_PM_CNTCTL(__cntr) (0x120 + ((__cntr) & 0x7) * 8)
#define L3_HML3_PM_EVTYPE(__cntr) (0x220 + ((__cntr) & 0x7) * 8)
#define L3_HML3_PM_FILTRA 0x300
#define L3_HML3_PM_FILTRB 0x308
#define L3_HML3_PM_FILTRC 0x310
#define L3_HML3_PM_FILTRAM 0x304
#define L3_HML3_PM_FILTRBM 0x30C
#define L3_HML3_PM_FILTRCM 0x314
/* Basic counter registers */
#define L3_M_BC_CR 0x500
#define L3_M_BC_SATROLL_CR 0x504
#define L3_M_BC_CNTENSET 0x508
#define L3_M_BC_CNTENCLR 0x50C
#define L3_M_BC_INTENSET 0x510
#define L3_M_BC_INTENCLR 0x514
#define L3_M_BC_GANG 0x718
#define L3_M_BC_OVSR 0x740
#define L3_M_BC_IRQCTL 0x96C
/*
* Bit field definitions
*/
/* L3_HML3_PM_CR */
#define PM_CR_RESET (0)
/* L3_HML3_PM_XCNTCTL/L3_HML3_PM_CNTCTLx */
#define PMCNT_RESET (0)
/* L3_HML3_PM_EVTYPEx */
#define EVSEL(__val) ((__val) & L3_EVTYPE_MASK)
/* Reset value for all the filter registers */
#define PM_FLTR_RESET (0)
/* L3_M_BC_CR */
#define BC_RESET (1UL << 1)
#define BC_ENABLE (1UL << 0)
/* L3_M_BC_SATROLL_CR */
#define BC_SATROLL_CR_RESET (0)
/* L3_M_BC_CNTENSET */
#define PMCNTENSET(__cntr) (1UL << ((__cntr) & 0x7))
/* L3_M_BC_CNTENCLR */
#define PMCNTENCLR(__cntr) (1UL << ((__cntr) & 0x7))
#define BC_CNTENCLR_RESET (0xFF)
/* L3_M_BC_INTENSET */
#define PMINTENSET(__cntr) (1UL << ((__cntr) & 0x7))
/* L3_M_BC_INTENCLR */
#define PMINTENCLR(__cntr) (1UL << ((__cntr) & 0x7))
#define BC_INTENCLR_RESET (0xFF)
/* L3_M_BC_GANG */
#define GANG_EN(__cntr) (1UL << ((__cntr) & 0x7))
#define BC_GANG_RESET (0)
/* L3_M_BC_OVSR */
#define PMOVSRCLR(__cntr) (1UL << ((__cntr) & 0x7))
#define PMOVSRCLR_RESET (0xFF)
/* L3_M_BC_IRQCTL */
#define PMIRQONMSBEN(__cntr) (1UL << ((__cntr) & 0x7))
#define BC_IRQCTL_RESET (0x0)
/*
* Events
*/
#define L3_EVENT_CYCLES 0x01
#define L3_EVENT_READ_HIT 0x20
#define L3_EVENT_READ_MISS 0x21
#define L3_EVENT_READ_HIT_D 0x22
#define L3_EVENT_READ_MISS_D 0x23
#define L3_EVENT_WRITE_HIT 0x24
#define L3_EVENT_WRITE_MISS 0x25
/*
* Decoding of settings from perf_event_attr
*
* The config format for perf events is:
* - config: bits 0-7: event type
* bit 32: HW counter size requested, 0: 32 bits, 1: 64 bits
*/
static inline u32 get_event_type(struct perf_event *event)
{
return (event->attr.config) & L3_EVTYPE_MASK;
}
static inline bool event_uses_long_counter(struct perf_event *event)
{
return !!(event->attr.config & BIT_ULL(L3_EVENT_LC_BIT));
}
static inline int event_num_counters(struct perf_event *event)
{
return event_uses_long_counter(event) ? 2 : 1;
}
/*
* Main PMU, inherits from the core perf PMU type
*/
struct l3cache_pmu {
struct pmu pmu;
struct hlist_node node;
void __iomem *regs;
struct perf_event *events[L3_NUM_COUNTERS];
unsigned long used_mask[BITS_TO_LONGS(L3_NUM_COUNTERS)];
cpumask_t cpumask;
};
#define to_l3cache_pmu(p) (container_of(p, struct l3cache_pmu, pmu))
/*
* Type used to group hardware counter operations
*
* Used to implement two types of hardware counters, standard (32bits) and
* long (64bits). The hardware supports counter chaining which we use to
* implement long counters. This support is exposed via the 'lc' flag field
* in perf_event_attr.config.
*/
struct l3cache_event_ops {
/* Called to start event monitoring */
void (*start)(struct perf_event *event);
/* Called to stop event monitoring */
void (*stop)(struct perf_event *event, int flags);
/* Called to update the perf_event */
void (*update)(struct perf_event *event);
};
/*
* Implementation of long counter operations
*
* 64bit counters are implemented by chaining two of the 32bit physical
* counters. The PMU only supports chaining of adjacent even/odd pairs
* and for simplicity the driver always configures the odd counter to
* count the overflows of the lower-numbered even counter. Note that since
* the resulting hardware counter is 64bits no IRQs are required to maintain
* the software counter which is also 64bits.
*/
static void qcom_l3_cache__64bit_counter_start(struct perf_event *event)
{
struct l3cache_pmu *l3pmu = to_l3cache_pmu(event->pmu);
int idx = event->hw.idx;
u32 evsel = get_event_type(event);
u32 gang;
/* Set the odd counter to count the overflows of the even counter */
gang = readl_relaxed(l3pmu->regs + L3_M_BC_GANG);
gang |= GANG_EN(idx + 1);
writel_relaxed(gang, l3pmu->regs + L3_M_BC_GANG);
/* Initialize the hardware counters and reset prev_count*/
local64_set(&event->hw.prev_count, 0);
writel_relaxed(0, l3pmu->regs + L3_HML3_PM_EVCNTR(idx + 1));
writel_relaxed(0, l3pmu->regs + L3_HML3_PM_EVCNTR(idx));
/*
* Set the event types, the upper half must use zero and the lower
* half the actual event type
*/
writel_relaxed(EVSEL(0), l3pmu->regs + L3_HML3_PM_EVTYPE(idx + 1));
writel_relaxed(EVSEL(evsel), l3pmu->regs + L3_HML3_PM_EVTYPE(idx));
/* Finally, enable the counters */
writel_relaxed(PMCNT_RESET, l3pmu->regs + L3_HML3_PM_CNTCTL(idx + 1));
writel_relaxed(PMCNTENSET(idx + 1), l3pmu->regs + L3_M_BC_CNTENSET);
writel_relaxed(PMCNT_RESET, l3pmu->regs + L3_HML3_PM_CNTCTL(idx));
writel_relaxed(PMCNTENSET(idx), l3pmu->regs + L3_M_BC_CNTENSET);
}
static void qcom_l3_cache__64bit_counter_stop(struct perf_event *event,
int flags)
{
struct l3cache_pmu *l3pmu = to_l3cache_pmu(event->pmu);
int idx = event->hw.idx;
u32 gang = readl_relaxed(l3pmu->regs + L3_M_BC_GANG);
/* Disable the counters */
writel_relaxed(PMCNTENCLR(idx), l3pmu->regs + L3_M_BC_CNTENCLR);
writel_relaxed(PMCNTENCLR(idx + 1), l3pmu->regs + L3_M_BC_CNTENCLR);
/* Disable chaining */
writel_relaxed(gang & ~GANG_EN(idx + 1), l3pmu->regs + L3_M_BC_GANG);
}
static void qcom_l3_cache__64bit_counter_update(struct perf_event *event)
{
struct l3cache_pmu *l3pmu = to_l3cache_pmu(event->pmu);
int idx = event->hw.idx;
u32 hi, lo;
u64 prev, new;
do {
prev = local64_read(&event->hw.prev_count);
do {
hi = readl_relaxed(l3pmu->regs + L3_HML3_PM_EVCNTR(idx + 1));
lo = readl_relaxed(l3pmu->regs + L3_HML3_PM_EVCNTR(idx));
} while (hi != readl_relaxed(l3pmu->regs + L3_HML3_PM_EVCNTR(idx + 1)));
new = ((u64)hi << 32) | lo;
} while (local64_cmpxchg(&event->hw.prev_count, prev, new) != prev);
local64_add(new - prev, &event->count);
}
static const struct l3cache_event_ops event_ops_long = {
.start = qcom_l3_cache__64bit_counter_start,
.stop = qcom_l3_cache__64bit_counter_stop,
.update = qcom_l3_cache__64bit_counter_update,
};
/*
* Implementation of standard counter operations
*
* 32bit counters use a single physical counter and a hardware feature that
* asserts the overflow IRQ on the toggling of the most significant bit in
* the counter. This feature allows the counters to be left free-running
* without needing the usual reprogramming required to properly handle races
* during concurrent calls to update.
*/
static void qcom_l3_cache__32bit_counter_start(struct perf_event *event)
{
struct l3cache_pmu *l3pmu = to_l3cache_pmu(event->pmu);
int idx = event->hw.idx;
u32 evsel = get_event_type(event);
u32 irqctl = readl_relaxed(l3pmu->regs + L3_M_BC_IRQCTL);
/* Set the counter to assert the overflow IRQ on MSB toggling */
writel_relaxed(irqctl | PMIRQONMSBEN(idx), l3pmu->regs + L3_M_BC_IRQCTL);
/* Initialize the hardware counter and reset prev_count*/
local64_set(&event->hw.prev_count, 0);
writel_relaxed(0, l3pmu->regs + L3_HML3_PM_EVCNTR(idx));
/* Set the event type */
writel_relaxed(EVSEL(evsel), l3pmu->regs + L3_HML3_PM_EVTYPE(idx));
/* Enable interrupt generation by this counter */
writel_relaxed(PMINTENSET(idx), l3pmu->regs + L3_M_BC_INTENSET);
/* Finally, enable the counter */
writel_relaxed(PMCNT_RESET, l3pmu->regs + L3_HML3_PM_CNTCTL(idx));
writel_relaxed(PMCNTENSET(idx), l3pmu->regs + L3_M_BC_CNTENSET);
}
static void qcom_l3_cache__32bit_counter_stop(struct perf_event *event,
int flags)
{
struct l3cache_pmu *l3pmu = to_l3cache_pmu(event->pmu);
int idx = event->hw.idx;
u32 irqctl = readl_relaxed(l3pmu->regs + L3_M_BC_IRQCTL);
/* Disable the counter */
writel_relaxed(PMCNTENCLR(idx), l3pmu->regs + L3_M_BC_CNTENCLR);
/* Disable interrupt generation by this counter */
writel_relaxed(PMINTENCLR(idx), l3pmu->regs + L3_M_BC_INTENCLR);
/* Set the counter to not assert the overflow IRQ on MSB toggling */
writel_relaxed(irqctl & ~PMIRQONMSBEN(idx), l3pmu->regs + L3_M_BC_IRQCTL);
}
static void qcom_l3_cache__32bit_counter_update(struct perf_event *event)
{
struct l3cache_pmu *l3pmu = to_l3cache_pmu(event->pmu);
int idx = event->hw.idx;
u32 prev, new;
do {
prev = local64_read(&event->hw.prev_count);
new = readl_relaxed(l3pmu->regs + L3_HML3_PM_EVCNTR(idx));
} while (local64_cmpxchg(&event->hw.prev_count, prev, new) != prev);
local64_add(new - prev, &event->count);
}
static const struct l3cache_event_ops event_ops_std = {
.start = qcom_l3_cache__32bit_counter_start,
.stop = qcom_l3_cache__32bit_counter_stop,
.update = qcom_l3_cache__32bit_counter_update,
};
/* Retrieve the appropriate operations for the given event */
static
const struct l3cache_event_ops *l3cache_event_get_ops(struct perf_event *event)
{
if (event_uses_long_counter(event))
return &event_ops_long;
else
return &event_ops_std;
}
/*
* Top level PMU functions.
*/
static inline void qcom_l3_cache__init(struct l3cache_pmu *l3pmu)
{
int i;
writel_relaxed(BC_RESET, l3pmu->regs + L3_M_BC_CR);
/*
* Use writel for the first programming command to ensure the basic
* counter unit is stopped before proceeding
*/
writel(BC_SATROLL_CR_RESET, l3pmu->regs + L3_M_BC_SATROLL_CR);
writel_relaxed(BC_CNTENCLR_RESET, l3pmu->regs + L3_M_BC_CNTENCLR);
writel_relaxed(BC_INTENCLR_RESET, l3pmu->regs + L3_M_BC_INTENCLR);
writel_relaxed(PMOVSRCLR_RESET, l3pmu->regs + L3_M_BC_OVSR);
writel_relaxed(BC_GANG_RESET, l3pmu->regs + L3_M_BC_GANG);
writel_relaxed(BC_IRQCTL_RESET, l3pmu->regs + L3_M_BC_IRQCTL);
writel_relaxed(PM_CR_RESET, l3pmu->regs + L3_HML3_PM_CR);
for (i = 0; i < L3_NUM_COUNTERS; ++i) {
writel_relaxed(PMCNT_RESET, l3pmu->regs + L3_HML3_PM_CNTCTL(i));
writel_relaxed(EVSEL(0), l3pmu->regs + L3_HML3_PM_EVTYPE(i));
}
writel_relaxed(PM_FLTR_RESET, l3pmu->regs + L3_HML3_PM_FILTRA);
writel_relaxed(PM_FLTR_RESET, l3pmu->regs + L3_HML3_PM_FILTRAM);
writel_relaxed(PM_FLTR_RESET, l3pmu->regs + L3_HML3_PM_FILTRB);
writel_relaxed(PM_FLTR_RESET, l3pmu->regs + L3_HML3_PM_FILTRBM);
writel_relaxed(PM_FLTR_RESET, l3pmu->regs + L3_HML3_PM_FILTRC);
writel_relaxed(PM_FLTR_RESET, l3pmu->regs + L3_HML3_PM_FILTRCM);
/*
* Use writel here to ensure all programming commands are done
* before proceeding
*/
writel(BC_ENABLE, l3pmu->regs + L3_M_BC_CR);
}
static irqreturn_t qcom_l3_cache__handle_irq(int irq_num, void *data)
{
struct l3cache_pmu *l3pmu = data;
/* Read the overflow status register */
long status = readl_relaxed(l3pmu->regs + L3_M_BC_OVSR);
int idx;
if (status == 0)
return IRQ_NONE;
/* Clear the bits we read on the overflow status register */
writel_relaxed(status, l3pmu->regs + L3_M_BC_OVSR);
for_each_set_bit(idx, &status, L3_NUM_COUNTERS) {
struct perf_event *event;
const struct l3cache_event_ops *ops;
event = l3pmu->events[idx];
if (!event)
continue;
/*
* Since the IRQ is not enabled for events using long counters
* we should never see one of those here, however, be consistent
* and use the ops indirections like in the other operations.
*/
ops = l3cache_event_get_ops(event);
ops->update(event);
}
return IRQ_HANDLED;
}
/*
* Implementation of abstract pmu functionality required by
* the core perf events code.
*/
static void qcom_l3_cache__pmu_enable(struct pmu *pmu)
{
struct l3cache_pmu *l3pmu = to_l3cache_pmu(pmu);
/* Ensure the other programming commands are observed before enabling */
wmb();
writel_relaxed(BC_ENABLE, l3pmu->regs + L3_M_BC_CR);
}
static void qcom_l3_cache__pmu_disable(struct pmu *pmu)
{
struct l3cache_pmu *l3pmu = to_l3cache_pmu(pmu);
writel_relaxed(0, l3pmu->regs + L3_M_BC_CR);
/* Ensure the basic counter unit is stopped before proceeding */
wmb();
}
/*
* We must NOT create groups containing events from multiple hardware PMUs,
* although mixing different software and hardware PMUs is allowed.
*/
static bool qcom_l3_cache__validate_event_group(struct perf_event *event)
{
struct perf_event *leader = event->group_leader;
struct perf_event *sibling;
int counters = 0;
if (leader->pmu != event->pmu && !is_software_event(leader))
return false;
counters = event_num_counters(event);
counters += event_num_counters(leader);
list_for_each_entry(sibling, &leader->sibling_list, group_entry) {
if (is_software_event(sibling))
continue;
if (sibling->pmu != event->pmu)
return false;
counters += event_num_counters(sibling);
}
/*
* If the group requires more counters than the HW has, it
* cannot ever be scheduled.
*/
return counters <= L3_NUM_COUNTERS;
}
static int qcom_l3_cache__event_init(struct perf_event *event)
{
struct l3cache_pmu *l3pmu = to_l3cache_pmu(event->pmu);
struct hw_perf_event *hwc = &event->hw;
/*
* Is the event for this PMU?
*/
if (event->attr.type != event->pmu->type)
return -ENOENT;
/*
* There are no per-counter mode filters in the PMU.
*/
if (event->attr.exclude_user || event->attr.exclude_kernel ||
event->attr.exclude_hv || event->attr.exclude_idle)
return -EINVAL;
/*
* Sampling not supported since these events are not core-attributable.
*/
if (hwc->sample_period)
return -EINVAL;
/*
* Task mode not available, we run the counters as socket counters,
* not attributable to any CPU and therefore cannot attribute per-task.
*/
if (event->cpu < 0)
return -EINVAL;
/* Validate the group */
if (!qcom_l3_cache__validate_event_group(event))
return -EINVAL;
hwc->idx = -1;
/*
* Many perf core operations (eg. events rotation) operate on a
* single CPU context. This is obvious for CPU PMUs, where one
* expects the same sets of events being observed on all CPUs,
* but can lead to issues for off-core PMUs, like this one, where
* each event could be theoretically assigned to a different CPU.
* To mitigate this, we enforce CPU assignment to one designated
* processor (the one described in the "cpumask" attribute exported
* by the PMU device). perf user space tools honor this and avoid
* opening more than one copy of the events.
*/
event->cpu = cpumask_first(&l3pmu->cpumask);
return 0;
}
static void qcom_l3_cache__event_start(struct perf_event *event, int flags)
{
struct hw_perf_event *hwc = &event->hw;
const struct l3cache_event_ops *ops = l3cache_event_get_ops(event);
hwc->state = 0;
ops->start(event);
}
static void qcom_l3_cache__event_stop(struct perf_event *event, int flags)
{
struct hw_perf_event *hwc = &event->hw;
const struct l3cache_event_ops *ops = l3cache_event_get_ops(event);
if (hwc->state & PERF_HES_STOPPED)
return;
ops->stop(event, flags);
if (flags & PERF_EF_UPDATE)
ops->update(event);
hwc->state |= PERF_HES_STOPPED | PERF_HES_UPTODATE;
}
static int qcom_l3_cache__event_add(struct perf_event *event, int flags)
{
struct l3cache_pmu *l3pmu = to_l3cache_pmu(event->pmu);
struct hw_perf_event *hwc = &event->hw;
int order = event_uses_long_counter(event) ? 1 : 0;
int idx;
/*
* Try to allocate a counter.
*/
idx = bitmap_find_free_region(l3pmu->used_mask, L3_NUM_COUNTERS, order);
if (idx < 0)
/* The counters are all in use. */
return -EAGAIN;
hwc->idx = idx;
hwc->state = PERF_HES_STOPPED | PERF_HES_UPTODATE;
l3pmu->events[idx] = event;
if (flags & PERF_EF_START)
qcom_l3_cache__event_start(event, 0);
/* Propagate changes to the userspace mapping. */
perf_event_update_userpage(event);
return 0;
}
static void qcom_l3_cache__event_del(struct perf_event *event, int flags)
{
struct l3cache_pmu *l3pmu = to_l3cache_pmu(event->pmu);
struct hw_perf_event *hwc = &event->hw;
int order = event_uses_long_counter(event) ? 1 : 0;
/* Stop and clean up */
qcom_l3_cache__event_stop(event, flags | PERF_EF_UPDATE);
l3pmu->events[hwc->idx] = NULL;
bitmap_release_region(l3pmu->used_mask, hwc->idx, order);
/* Propagate changes to the userspace mapping. */
perf_event_update_userpage(event);
}
static void qcom_l3_cache__event_read(struct perf_event *event)
{
const struct l3cache_event_ops *ops = l3cache_event_get_ops(event);
ops->update(event);
}
/*
* Add sysfs attributes
*
* We export:
* - formats, used by perf user space and other tools to configure events
* - events, used by perf user space and other tools to create events
* symbolically, e.g.:
* perf stat -a -e l3cache_0_0/event=read-miss/ ls
* perf stat -a -e l3cache_0_0/event=0x21/ ls
* - cpumask, used by perf user space and other tools to know on which CPUs
* to open the events
*/
/* formats */
static ssize_t l3cache_pmu_format_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct dev_ext_attribute *eattr;
eattr = container_of(attr, struct dev_ext_attribute, attr);
return sprintf(buf, "%s\n", (char *) eattr->var);
}
#define L3CACHE_PMU_FORMAT_ATTR(_name, _config) \
(&((struct dev_ext_attribute[]) { \
{ .attr = __ATTR(_name, 0444, l3cache_pmu_format_show, NULL), \
.var = (void *) _config, } \
})[0].attr.attr)
static struct attribute *qcom_l3_cache_pmu_formats[] = {
L3CACHE_PMU_FORMAT_ATTR(event, "config:0-7"),
L3CACHE_PMU_FORMAT_ATTR(lc, "config:" __stringify(L3_EVENT_LC_BIT)),
NULL,
};
static struct attribute_group qcom_l3_cache_pmu_format_group = {
.name = "format",
.attrs = qcom_l3_cache_pmu_formats,
};
/* events */
static ssize_t l3cache_pmu_event_show(struct device *dev,
struct device_attribute *attr, char *page)
{
struct perf_pmu_events_attr *pmu_attr;
pmu_attr = container_of(attr, struct perf_pmu_events_attr, attr);
return sprintf(page, "event=0x%02llx\n", pmu_attr->id);
}
#define L3CACHE_EVENT_ATTR(_name, _id) \
(&((struct perf_pmu_events_attr[]) { \
{ .attr = __ATTR(_name, 0444, l3cache_pmu_event_show, NULL), \
.id = _id, } \
})[0].attr.attr)
static struct attribute *qcom_l3_cache_pmu_events[] = {
L3CACHE_EVENT_ATTR(cycles, L3_EVENT_CYCLES),
L3CACHE_EVENT_ATTR(read-hit, L3_EVENT_READ_HIT),
L3CACHE_EVENT_ATTR(read-miss, L3_EVENT_READ_MISS),
L3CACHE_EVENT_ATTR(read-hit-d-side, L3_EVENT_READ_HIT_D),
L3CACHE_EVENT_ATTR(read-miss-d-side, L3_EVENT_READ_MISS_D),
L3CACHE_EVENT_ATTR(write-hit, L3_EVENT_WRITE_HIT),
L3CACHE_EVENT_ATTR(write-miss, L3_EVENT_WRITE_MISS),
NULL
};
static struct attribute_group qcom_l3_cache_pmu_events_group = {
.name = "events",
.attrs = qcom_l3_cache_pmu_events,
};
/* cpumask */
static ssize_t qcom_l3_cache_pmu_cpumask_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct l3cache_pmu *l3pmu = to_l3cache_pmu(dev_get_drvdata(dev));
return cpumap_print_to_pagebuf(true, buf, &l3pmu->cpumask);
}
static DEVICE_ATTR(cpumask, 0444, qcom_l3_cache_pmu_cpumask_show, NULL);
static struct attribute *qcom_l3_cache_pmu_cpumask_attrs[] = {
&dev_attr_cpumask.attr,
NULL,
};
static struct attribute_group qcom_l3_cache_pmu_cpumask_attr_group = {
.attrs = qcom_l3_cache_pmu_cpumask_attrs,
};
/*
* Per PMU device attribute groups
*/
static const struct attribute_group *qcom_l3_cache_pmu_attr_grps[] = {
&qcom_l3_cache_pmu_format_group,
&qcom_l3_cache_pmu_events_group,
&qcom_l3_cache_pmu_cpumask_attr_group,
NULL,
};
/*
* Probing functions and data.
*/
static int qcom_l3_cache_pmu_online_cpu(unsigned int cpu, struct hlist_node *node)
{
struct l3cache_pmu *l3pmu = hlist_entry_safe(node, struct l3cache_pmu, node);
/* If there is not a CPU/PMU association pick this CPU */
if (cpumask_empty(&l3pmu->cpumask))
cpumask_set_cpu(cpu, &l3pmu->cpumask);
return 0;
}
static int qcom_l3_cache_pmu_offline_cpu(unsigned int cpu, struct hlist_node *node)
{
struct l3cache_pmu *l3pmu = hlist_entry_safe(node, struct l3cache_pmu, node);
unsigned int target;
if (!cpumask_test_and_clear_cpu(cpu, &l3pmu->cpumask))
return 0;
target = cpumask_any_but(cpu_online_mask, cpu);
if (target >= nr_cpu_ids)
return 0;
perf_pmu_migrate_context(&l3pmu->pmu, cpu, target);
cpumask_set_cpu(target, &l3pmu->cpumask);
return 0;
}
static int qcom_l3_cache_pmu_probe(struct platform_device *pdev)
{
struct l3cache_pmu *l3pmu;
struct acpi_device *acpi_dev;
struct resource *memrc;
int ret;
char *name;
/* Initialize the PMU data structures */
acpi_dev = ACPI_COMPANION(&pdev->dev);
if (!acpi_dev)
return -ENODEV;
l3pmu = devm_kzalloc(&pdev->dev, sizeof(*l3pmu), GFP_KERNEL);
name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "l3cache_%s_%s",
acpi_dev->parent->pnp.unique_id, acpi_dev->pnp.unique_id);
if (!l3pmu || !name)
return -ENOMEM;
l3pmu->pmu = (struct pmu) {
.task_ctx_nr = perf_invalid_context,
.pmu_enable = qcom_l3_cache__pmu_enable,
.pmu_disable = qcom_l3_cache__pmu_disable,
.event_init = qcom_l3_cache__event_init,
.add = qcom_l3_cache__event_add,
.del = qcom_l3_cache__event_del,
.start = qcom_l3_cache__event_start,
.stop = qcom_l3_cache__event_stop,
.read = qcom_l3_cache__event_read,
.attr_groups = qcom_l3_cache_pmu_attr_grps,
};
memrc = platform_get_resource(pdev, IORESOURCE_MEM, 0);
l3pmu->regs = devm_ioremap_resource(&pdev->dev, memrc);
if (IS_ERR(l3pmu->regs)) {
dev_err(&pdev->dev, "Can't map PMU @%pa\n", &memrc->start);
return PTR_ERR(l3pmu->regs);
}
qcom_l3_cache__init(l3pmu);
ret = platform_get_irq(pdev, 0);
if (ret <= 0)
return ret;
ret = devm_request_irq(&pdev->dev, ret, qcom_l3_cache__handle_irq, 0,
name, l3pmu);
if (ret) {
dev_err(&pdev->dev, "Request for IRQ failed for slice @%pa\n",
&memrc->start);
return ret;
}
/* Add this instance to the list used by the offline callback */
ret = cpuhp_state_add_instance(CPUHP_AP_PERF_ARM_QCOM_L3_ONLINE, &l3pmu->node);
if (ret) {
dev_err(&pdev->dev, "Error %d registering hotplug", ret);
return ret;
}
ret = perf_pmu_register(&l3pmu->pmu, name, -1);
if (ret < 0) {
dev_err(&pdev->dev, "Failed to register L3 cache PMU (%d)\n", ret);
return ret;
}
dev_info(&pdev->dev, "Registered %s, type: %d\n", name, l3pmu->pmu.type);
return 0;
}
static const struct acpi_device_id qcom_l3_cache_pmu_acpi_match[] = {
{ "QCOM8081", },
{ }
};
MODULE_DEVICE_TABLE(acpi, qcom_l3_cache_pmu_acpi_match);
static struct platform_driver qcom_l3_cache_pmu_driver = {
.driver = {
.name = "qcom-l3cache-pmu",
.acpi_match_table = ACPI_PTR(qcom_l3_cache_pmu_acpi_match),
},
.probe = qcom_l3_cache_pmu_probe,
};
static int __init register_qcom_l3_cache_pmu_driver(void)
{
int ret;
/* Install a hook to update the reader CPU in case it goes offline */
ret = cpuhp_setup_state_multi(CPUHP_AP_PERF_ARM_QCOM_L3_ONLINE,
"perf/qcom/l3cache:online",
qcom_l3_cache_pmu_online_cpu,
qcom_l3_cache_pmu_offline_cpu);
if (ret)
return ret;
return platform_driver_register(&qcom_l3_cache_pmu_driver);
}
device_initcall(register_qcom_l3_cache_pmu_driver);

3
include/linux/acpi_iort.h
View File

@ -34,6 +34,8 @@ void acpi_iort_init(void);
bool iort_node_match(u8 type);
u32 iort_msi_map_rid(struct device *dev, u32 req_id);
struct irq_domain *iort_get_device_domain(struct device *dev, u32 req_id);
void acpi_configure_pmsi_domain(struct device *dev);
int iort_pmsi_get_dev_id(struct device *dev, u32 *dev_id);
/* IOMMU interface */
void iort_set_dma_mask(struct device *dev);
const struct iommu_ops *iort_iommu_configure(struct device *dev);
@ -45,6 +47,7 @@ static inline u32 iort_msi_map_rid(struct device *dev, u32 req_id)
static inline struct irq_domain *iort_get_device_domain(struct device *dev,
u32 req_id)
{ return NULL; }
static inline void acpi_configure_pmsi_domain(struct device *dev) { }
/* IOMMU interface */
static inline void iort_set_dma_mask(struct device *dev) { }
static inline

2
include/linux/cpuhotplug.h
View File

@ -94,6 +94,7 @@ enum cpuhp_state {
CPUHP_AP_ARM_VFP_STARTING,
CPUHP_AP_ARM64_DEBUG_MONITORS_STARTING,
CPUHP_AP_PERF_ARM_HW_BREAKPOINT_STARTING,
CPUHP_AP_PERF_ARM_ACPI_STARTING,
CPUHP_AP_PERF_ARM_STARTING,
CPUHP_AP_ARM_L2X0_STARTING,
CPUHP_AP_ARM_ARCH_TIMER_STARTING,
@ -137,6 +138,7 @@ enum cpuhp_state {
CPUHP_AP_PERF_ARM_CCN_ONLINE,
CPUHP_AP_PERF_ARM_L2X0_ONLINE,
CPUHP_AP_PERF_ARM_QCOM_L2_ONLINE,
CPUHP_AP_PERF_ARM_QCOM_L3_ONLINE,
CPUHP_AP_WORKQUEUE_ONLINE,
CPUHP_AP_RCUTREE_ONLINE,
CPUHP_AP_ONLINE_DYN,

2
include/linux/memblock.h
View File

@ -93,6 +93,7 @@ int memblock_mark_hotplug(phys_addr_t base, phys_addr_t size);
int memblock_clear_hotplug(phys_addr_t base, phys_addr_t size);
int memblock_mark_mirror(phys_addr_t base, phys_addr_t size);
int memblock_mark_nomap(phys_addr_t base, phys_addr_t size);
int memblock_clear_nomap(phys_addr_t base, phys_addr_t size);
ulong choose_memblock_flags(void);
/* Low level functions */
@ -335,6 +336,7 @@ phys_addr_t memblock_mem_size(unsigned long limit_pfn);
phys_addr_t memblock_start_of_DRAM(void);
phys_addr_t memblock_end_of_DRAM(void);
void memblock_enforce_memory_limit(phys_addr_t memory_limit);
void memblock_cap_memory_range(phys_addr_t base, phys_addr_t size);
void memblock_mem_limit_remove_map(phys_addr_t limit);
bool memblock_is_memory(phys_addr_t addr);
int memblock_is_map_memory(phys_addr_t addr);

177
include/linux/pe.h
View File

@ -23,34 +23,6 @@
#define MZ_MAGIC 0x5a4d /* "MZ" */
struct mz_hdr {
uint16_t magic; /* MZ_MAGIC */
uint16_t lbsize; /* size of last used block */
uint16_t blocks; /* pages in file, 0x3 */
uint16_t relocs; /* relocations */
uint16_t hdrsize; /* header size in "paragraphs" */
uint16_t min_extra_pps; /* .bss */
uint16_t max_extra_pps; /* runtime limit for the arena size */
uint16_t ss; /* relative stack segment */
uint16_t sp; /* initial %sp register */
uint16_t checksum; /* word checksum */
uint16_t ip; /* initial %ip register */
uint16_t cs; /* initial %cs relative to load segment */
uint16_t reloc_table_offset; /* offset of the first relocation */
uint16_t overlay_num; /* overlay number. set to 0. */
uint16_t reserved0[4]; /* reserved */
uint16_t oem_id; /* oem identifier */
uint16_t oem_info; /* oem specific */
uint16_t reserved1[10]; /* reserved */
uint32_t peaddr; /* address of pe header */
char message[64]; /* message to print */
};
struct mz_reloc {
uint16_t offset;
uint16_t segment;
};
#define PE_MAGIC 0x00004550 /* "PE\0\0" */
#define PE_OPT_MAGIC_PE32 0x010b
#define PE_OPT_MAGIC_PE32_ROM 0x0107
@ -62,6 +34,7 @@ struct mz_reloc {
#define IMAGE_FILE_MACHINE_AMD64 0x8664
#define IMAGE_FILE_MACHINE_ARM 0x01c0
#define IMAGE_FILE_MACHINE_ARMV7 0x01c4
#define IMAGE_FILE_MACHINE_ARM64 0xaa64
#define IMAGE_FILE_MACHINE_EBC 0x0ebc
#define IMAGE_FILE_MACHINE_I386 0x014c
#define IMAGE_FILE_MACHINE_IA64 0x0200
@ -98,17 +71,6 @@ struct mz_reloc {
#define IMAGE_FILE_UP_SYSTEM_ONLY 0x4000
#define IMAGE_FILE_BYTES_REVERSED_HI 0x8000
struct pe_hdr {
uint32_t magic; /* PE magic */
uint16_t machine; /* machine type */
uint16_t sections; /* number of sections */
uint32_t timestamp; /* time_t */
uint32_t symbol_table; /* symbol table offset */
uint32_t symbols; /* number of symbols */
uint16_t opt_hdr_size; /* size of optional header */
uint16_t flags; /* flags */
};
#define IMAGE_FILE_OPT_ROM_MAGIC 0x107
#define IMAGE_FILE_OPT_PE32_MAGIC 0x10b
#define IMAGE_FILE_OPT_PE32_PLUS_MAGIC 0x20b
@ -134,6 +96,95 @@ struct pe_hdr {
#define IMAGE_DLLCHARACTERISTICS_WDM_DRIVER 0x2000
#define IMAGE_DLLCHARACTERISTICS_TERMINAL_SERVER_AWARE 0x8000
/* they actually defined 0x00000000 as well, but I think we'll skip that one. */
#define IMAGE_SCN_RESERVED_0 0x00000001
#define IMAGE_SCN_RESERVED_1 0x00000002
#define IMAGE_SCN_RESERVED_2 0x00000004
#define IMAGE_SCN_TYPE_NO_PAD 0x00000008 /* don't pad - obsolete */
#define IMAGE_SCN_RESERVED_3 0x00000010
#define IMAGE_SCN_CNT_CODE 0x00000020 /* .text */
#define IMAGE_SCN_CNT_INITIALIZED_DATA 0x00000040 /* .data */
#define IMAGE_SCN_CNT_UNINITIALIZED_DATA 0x00000080 /* .bss */
#define IMAGE_SCN_LNK_OTHER 0x00000100 /* reserved */
#define IMAGE_SCN_LNK_INFO 0x00000200 /* .drectve comments */
#define IMAGE_SCN_RESERVED_4 0x00000400
#define IMAGE_SCN_LNK_REMOVE 0x00000800 /* .o only - scn to be rm'd*/
#define IMAGE_SCN_LNK_COMDAT 0x00001000 /* .o only - COMDAT data */
#define IMAGE_SCN_RESERVED_5 0x00002000 /* spec omits this */
#define IMAGE_SCN_RESERVED_6 0x00004000 /* spec omits this */
#define IMAGE_SCN_GPREL 0x00008000 /* global pointer referenced data */
/* spec lists 0x20000 twice, I suspect they meant 0x10000 for one of them */
#define IMAGE_SCN_MEM_PURGEABLE 0x00010000 /* reserved for "future" use */
#define IMAGE_SCN_16BIT 0x00020000 /* reserved for "future" use */
#define IMAGE_SCN_LOCKED 0x00040000 /* reserved for "future" use */
#define IMAGE_SCN_PRELOAD 0x00080000 /* reserved for "future" use */
/* and here they just stuck a 1-byte integer in the middle of a bitfield */
#define IMAGE_SCN_ALIGN_1BYTES 0x00100000 /* it does what it says on the box */
#define IMAGE_SCN_ALIGN_2BYTES 0x00200000
#define IMAGE_SCN_ALIGN_4BYTES 0x00300000
#define IMAGE_SCN_ALIGN_8BYTES 0x00400000
#define IMAGE_SCN_ALIGN_16BYTES 0x00500000
#define IMAGE_SCN_ALIGN_32BYTES 0x00600000
#define IMAGE_SCN_ALIGN_64BYTES 0x00700000
#define IMAGE_SCN_ALIGN_128BYTES 0x00800000
#define IMAGE_SCN_ALIGN_256BYTES 0x00900000
#define IMAGE_SCN_ALIGN_512BYTES 0x00a00000
#define IMAGE_SCN_ALIGN_1024BYTES 0x00b00000
#define IMAGE_SCN_ALIGN_2048BYTES 0x00c00000
#define IMAGE_SCN_ALIGN_4096BYTES 0x00d00000
#define IMAGE_SCN_ALIGN_8192BYTES 0x00e00000
#define IMAGE_SCN_LNK_NRELOC_OVFL 0x01000000 /* extended relocations */
#define IMAGE_SCN_MEM_DISCARDABLE 0x02000000 /* scn can be discarded */
#define IMAGE_SCN_MEM_NOT_CACHED 0x04000000 /* cannot be cached */
#define IMAGE_SCN_MEM_NOT_PAGED 0x08000000 /* not pageable */
#define IMAGE_SCN_MEM_SHARED 0x10000000 /* can be shared */
#define IMAGE_SCN_MEM_EXECUTE 0x20000000 /* can be executed as code */
#define IMAGE_SCN_MEM_READ 0x40000000 /* readable */
#define IMAGE_SCN_MEM_WRITE 0x80000000 /* writeable */
#define IMAGE_DEBUG_TYPE_CODEVIEW 2
#ifndef __ASSEMBLY__
struct mz_hdr {
uint16_t magic; /* MZ_MAGIC */
uint16_t lbsize; /* size of last used block */
uint16_t blocks; /* pages in file, 0x3 */
uint16_t relocs; /* relocations */
uint16_t hdrsize; /* header size in "paragraphs" */
uint16_t min_extra_pps; /* .bss */
uint16_t max_extra_pps; /* runtime limit for the arena size */
uint16_t ss; /* relative stack segment */
uint16_t sp; /* initial %sp register */
uint16_t checksum; /* word checksum */
uint16_t ip; /* initial %ip register */
uint16_t cs; /* initial %cs relative to load segment */
uint16_t reloc_table_offset; /* offset of the first relocation */
uint16_t overlay_num; /* overlay number. set to 0. */
uint16_t reserved0[4]; /* reserved */
uint16_t oem_id; /* oem identifier */
uint16_t oem_info; /* oem specific */
uint16_t reserved1[10]; /* reserved */
uint32_t peaddr; /* address of pe header */
char message[64]; /* message to print */
};
struct mz_reloc {
uint16_t offset;
uint16_t segment;
};
struct pe_hdr {
uint32_t magic; /* PE magic */
uint16_t machine; /* machine type */
uint16_t sections; /* number of sections */
uint32_t timestamp; /* time_t */
uint32_t symbol_table; /* symbol table offset */
uint32_t symbols; /* number of symbols */
uint16_t opt_hdr_size; /* size of optional header */
uint16_t flags; /* flags */
};
/* the fact that pe32 isn't padded where pe32+ is 64-bit means union won't
* work right. vomit. */
struct pe32_opt_hdr {
@ -243,52 +294,6 @@ struct section_header {
uint32_t flags;
};
/* they actually defined 0x00000000 as well, but I think we'll skip that one. */
#define IMAGE_SCN_RESERVED_0 0x00000001
#define IMAGE_SCN_RESERVED_1 0x00000002
#define IMAGE_SCN_RESERVED_2 0x00000004
#define IMAGE_SCN_TYPE_NO_PAD 0x00000008 /* don't pad - obsolete */
#define IMAGE_SCN_RESERVED_3 0x00000010
#define IMAGE_SCN_CNT_CODE 0x00000020 /* .text */
#define IMAGE_SCN_CNT_INITIALIZED_DATA 0x00000040 /* .data */
#define IMAGE_SCN_CNT_UNINITIALIZED_DATA 0x00000080 /* .bss */
#define IMAGE_SCN_LNK_OTHER 0x00000100 /* reserved */
#define IMAGE_SCN_LNK_INFO 0x00000200 /* .drectve comments */
#define IMAGE_SCN_RESERVED_4 0x00000400
#define IMAGE_SCN_LNK_REMOVE 0x00000800 /* .o only - scn to be rm'd*/
#define IMAGE_SCN_LNK_COMDAT 0x00001000 /* .o only - COMDAT data */
#define IMAGE_SCN_RESERVED_5 0x00002000 /* spec omits this */
#define IMAGE_SCN_RESERVED_6 0x00004000 /* spec omits this */
#define IMAGE_SCN_GPREL 0x00008000 /* global pointer referenced data */
/* spec lists 0x20000 twice, I suspect they meant 0x10000 for one of them */
#define IMAGE_SCN_MEM_PURGEABLE 0x00010000 /* reserved for "future" use */
#define IMAGE_SCN_16BIT 0x00020000 /* reserved for "future" use */
#define IMAGE_SCN_LOCKED 0x00040000 /* reserved for "future" use */
#define IMAGE_SCN_PRELOAD 0x00080000 /* reserved for "future" use */
/* and here they just stuck a 1-byte integer in the middle of a bitfield */
#define IMAGE_SCN_ALIGN_1BYTES 0x00100000 /* it does what it says on the box */
#define IMAGE_SCN_ALIGN_2BYTES 0x00200000
#define IMAGE_SCN_ALIGN_4BYTES 0x00300000
#define IMAGE_SCN_ALIGN_8BYTES 0x00400000
#define IMAGE_SCN_ALIGN_16BYTES 0x00500000
#define IMAGE_SCN_ALIGN_32BYTES 0x00600000
#define IMAGE_SCN_ALIGN_64BYTES 0x00700000
#define IMAGE_SCN_ALIGN_128BYTES 0x00800000
#define IMAGE_SCN_ALIGN_256BYTES 0x00900000
#define IMAGE_SCN_ALIGN_512BYTES 0x00a00000
#define IMAGE_SCN_ALIGN_1024BYTES 0x00b00000
#define IMAGE_SCN_ALIGN_2048BYTES 0x00c00000
#define IMAGE_SCN_ALIGN_4096BYTES 0x00d00000
#define IMAGE_SCN_ALIGN_8192BYTES 0x00e00000
#define IMAGE_SCN_LNK_NRELOC_OVFL 0x01000000 /* extended relocations */
#define IMAGE_SCN_MEM_DISCARDABLE 0x02000000 /* scn can be discarded */
#define IMAGE_SCN_MEM_NOT_CACHED 0x04000000 /* cannot be cached */
#define IMAGE_SCN_MEM_NOT_PAGED 0x08000000 /* not pageable */
#define IMAGE_SCN_MEM_SHARED 0x10000000 /* can be shared */
#define IMAGE_SCN_MEM_EXECUTE 0x20000000 /* can be executed as code */
#define IMAGE_SCN_MEM_READ 0x40000000 /* readable */
#define IMAGE_SCN_MEM_WRITE 0x80000000 /* writeable */
enum x64_coff_reloc_type {
IMAGE_REL_AMD64_ABSOLUTE = 0,
IMAGE_REL_AMD64_ADDR64,
@ -445,4 +450,6 @@ struct win_certificate {
uint16_t cert_type;
};
#endif /* !__ASSEMBLY__ */
#endif /* __LINUX_PE_H */

29
include/linux/perf/arm_pmu.h
View File

@ -75,6 +75,8 @@ struct pmu_hw_events {
* already have to allocate this struct per cpu.
*/
struct arm_pmu *percpu_pmu;
int irq;
};
enum armpmu_attr_groups {
@ -88,7 +90,6 @@ struct arm_pmu {
struct pmu pmu;
cpumask_t active_irqs;
cpumask_t supported_cpus;
int *irq_affinity;
char *name;
irqreturn_t (*handle_irq)(int irq_num, void *dev);
void (*enable)(struct perf_event *event);
@ -104,12 +105,8 @@ struct arm_pmu {
void (*start)(struct arm_pmu *);
void (*stop)(struct arm_pmu *);
void (*reset)(void *);
int (*request_irq)(struct arm_pmu *, irq_handler_t handler);
void (*free_irq)(struct arm_pmu *);
int (*map_event)(struct perf_event *event);
int num_events;
atomic_t active_events;
struct mutex reserve_mutex;
u64 max_period;
bool secure_access; /* 32-bit ARM only */
#define ARMV8_PMUV3_MAX_COMMON_EVENTS 0x40
@ -120,6 +117,9 @@ struct arm_pmu {
struct notifier_block cpu_pm_nb;
/* the attr_groups array must be NULL-terminated */
const struct attribute_group *attr_groups[ARMPMU_NR_ATTR_GROUPS + 1];
/* Only to be used by ACPI probing code */
unsigned long acpi_cpuid;
};
#define to_arm_pmu(p) (container_of(p, struct arm_pmu, pmu))
@ -135,10 +135,12 @@ int armpmu_map_event(struct perf_event *event,
[PERF_COUNT_HW_CACHE_RESULT_MAX],
u32 raw_event_mask);
typedef int (*armpmu_init_fn)(struct arm_pmu *);
struct pmu_probe_info {
unsigned int cpuid;
unsigned int mask;
int (*init)(struct arm_pmu *);
armpmu_init_fn init;
};
#define PMU_PROBE(_cpuid, _mask, _fn) \
@ -160,6 +162,21 @@ int arm_pmu_device_probe(struct platform_device *pdev,
const struct of_device_id *of_table,
const struct pmu_probe_info *probe_table);
#ifdef CONFIG_ACPI
int arm_pmu_acpi_probe(armpmu_init_fn init_fn);
#else
static inline int arm_pmu_acpi_probe(armpmu_init_fn init_fn) { return 0; }
#endif
/* Internal functions only for core arm_pmu code */
struct arm_pmu *armpmu_alloc(void);
void armpmu_free(struct arm_pmu *pmu);
int armpmu_register(struct arm_pmu *pmu);
int armpmu_request_irqs(struct arm_pmu *armpmu);
void armpmu_free_irqs(struct arm_pmu *armpmu);
int armpmu_request_irq(struct arm_pmu *armpmu, int cpu);
void armpmu_free_irq(struct arm_pmu *armpmu, int cpu);
#define ARMV8_PMU_PDEV_NAME "armv8-pmu"
#endif /* CONFIG_ARM_PMU */

56
mm/memblock.c
View File

@ -804,6 +804,18 @@ int __init_memblock memblock_mark_nomap(phys_addr_t base, phys_addr_t size)
return memblock_setclr_flag(base, size, 1, MEMBLOCK_NOMAP);
}
/**
* memblock_clear_nomap - Clear flag MEMBLOCK_NOMAP for a specified region.
* @base: the base phys addr of the region
* @size: the size of the region
*
* Return 0 on success, -errno on failure.
*/
int __init_memblock memblock_clear_nomap(phys_addr_t base, phys_addr_t size)
{
return memblock_setclr_flag(base, size, 0, MEMBLOCK_NOMAP);
}
/**
* __next_reserved_mem_region - next function for for_each_reserved_region()
* @idx: pointer to u64 loop variable
@ -1531,11 +1543,37 @@ void __init memblock_enforce_memory_limit(phys_addr_t limit)
(phys_addr_t)ULLONG_MAX);
}
void __init memblock_cap_memory_range(phys_addr_t base, phys_addr_t size)
{
int start_rgn, end_rgn;
int i, ret;
if (!size)
return;
ret = memblock_isolate_range(&memblock.memory, base, size,
&start_rgn, &end_rgn);
if (ret)
return;
/* remove all the MAP regions */
for (i = memblock.memory.cnt - 1; i >= end_rgn; i--)
if (!memblock_is_nomap(&memblock.memory.regions[i]))
memblock_remove_region(&memblock.memory, i);
for (i = start_rgn - 1; i >= 0; i--)
if (!memblock_is_nomap(&memblock.memory.regions[i]))
memblock_remove_region(&memblock.memory, i);
/* truncate the reserved regions */
memblock_remove_range(&memblock.reserved, 0, base);
memblock_remove_range(&memblock.reserved,
base + size, (phys_addr_t)ULLONG_MAX);
}
void __init memblock_mem_limit_remove_map(phys_addr_t limit)
{
struct memblock_type *type = &memblock.memory;
phys_addr_t max_addr;
int i, ret, start_rgn, end_rgn;
if (!limit)
return;
@ -1546,19 +1584,7 @@ void __init memblock_mem_limit_remove_map(phys_addr_t limit)
if (max_addr == (phys_addr_t)ULLONG_MAX)
return;
ret = memblock_isolate_range(type, max_addr, (phys_addr_t)ULLONG_MAX,
&start_rgn, &end_rgn);
if (ret)
return;
/* remove all the MAP regions above the limit */
for (i = end_rgn - 1; i >= start_rgn; i--) {
if (!memblock_is_nomap(&type->regions[i]))
memblock_remove_region(type, i);
}
/* truncate the reserved regions */
memblock_remove_range(&memblock.reserved, max_addr,
(phys_addr_t)ULLONG_MAX);
memblock_cap_memory_range(0, max_addr);
}
static int __init_memblock memblock_search(struct memblock_type *type, phys_addr_t addr)

4
virt/kvm/arm/vgic/vgic.c
View File

@ -29,7 +29,9 @@
#define DEBUG_SPINLOCK_BUG_ON(p)
#endif
struct vgic_global __section(.hyp.text) kvm_vgic_global_state = {.gicv3_cpuif = STATIC_KEY_FALSE_INIT,};
struct vgic_global kvm_vgic_global_state __ro_after_init = {
.gicv3_cpuif = STATIC_KEY_FALSE_INIT,
};
/*
* Locking order is always: