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Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 

Pull x86 fixes from Thomas Gleixner:
 "A few updates for x86:

   - Fix an unintended sign extension issue in the fault handling code

   - Rename the new resource control config switch so it's less
     confusing

   - Avoid setting up EFI info in kexec when the EFI runtime is
     disabled.

   - Fix the microcode version check in the AMD microcode loader so it
     only loads higher version numbers and never downgrades

   - Set EFER.LME in the 32bit trampoline before returning to long mode
     to handle older AMD/KVM behaviour properly.

   - Add Darren and Andy as x86/platform reviewers"

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/resctrl: Avoid confusion over the new X86_RESCTRL config
  x86/kexec: Don't setup EFI info if EFI runtime is not enabled
  x86/microcode/amd: Don't falsely trick the late loading mechanism
  MAINTAINERS: Add Andy and Darren as arch/x86/platform/ reviewers
  x86/fault: Fix sign-extend unintended sign extension
  x86/boot/compressed/64: Set EFER.LME=1 in 32-bit trampoline before returning to long mode
  x86/cpu: Add Atom Tremont (Jacobsville)
This commit is contained in:
Linus Torvalds 2019-02-03 09:08:12 -08:00
parent cc6810e36b e6d429313e
commit 24b888d8d5
13 changed files with 35 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
Documentation/x86/resctrl_ui.txt
View File

@ -9,7 +9,7 @@ Fenghua Yu <fenghua.yu@intel.com>
Tony Luck <tony.luck@intel.com>
Vikas Shivappa <vikas.shivappa@intel.com>
This feature is enabled by the CONFIG_X86_RESCTRL and the x86 /proc/cpuinfo
This feature is enabled by the CONFIG_X86_CPU_RESCTRL and the x86 /proc/cpuinfo
flag bits:
RDT (Resource Director Technology) Allocation - "rdt_a"
CAT (Cache Allocation Technology) - "cat_l3", "cat_l2"

9
MAINTAINERS
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@ -16641,6 +16641,15 @@ S: Maintained
F: drivers/platform/x86/
F: drivers/platform/olpc/
X86 PLATFORM DRIVERS - ARCH
R: Darren Hart <dvhart@infradead.org>
R: Andy Shevchenko <andy@infradead.org>
L: platform-driver-x86@vger.kernel.org
L: x86@kernel.org
T: git git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git x86/core
S: Maintained
F: arch/x86/platform
X86 VDSO
M: Andy Lutomirski <luto@kernel.org>
L: linux-kernel@vger.kernel.org

6
arch/x86/Kconfig
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@ -446,12 +446,12 @@ config RETPOLINE
branches. Requires a compiler with -mindirect-branch=thunk-extern
support for full protection. The kernel may run slower.
config X86_RESCTRL
bool "Resource Control support"
config X86_CPU_RESCTRL
bool "x86 CPU resource control support"
depends on X86 && (CPU_SUP_INTEL || CPU_SUP_AMD)
select KERNFS
help
Enable Resource Control support.
Enable x86 CPU resource control support.
Provide support for the allocation and monitoring of system resources
usage by the CPU.

8
arch/x86/boot/compressed/head_64.S
View File

@ -600,6 +600,14 @@ ENTRY(trampoline_32bit_src)
leal TRAMPOLINE_32BIT_PGTABLE_OFFSET(%ecx), %eax
movl %eax, %cr3
3:
/* Set EFER.LME=1 as a precaution in case hypervsior pulls the rug */
pushl %ecx
movl $MSR_EFER, %ecx
rdmsr
btsl $_EFER_LME, %eax
wrmsr
popl %ecx
/* Enable PAE and LA57 (if required) paging modes */
movl $X86_CR4_PAE, %eax
cmpl $0, %edx

2
arch/x86/boot/compressed/pgtable.h
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@ -6,7 +6,7 @@
#define TRAMPOLINE_32BIT_PGTABLE_OFFSET 0
#define TRAMPOLINE_32BIT_CODE_OFFSET PAGE_SIZE
#define TRAMPOLINE_32BIT_CODE_SIZE 0x60
#define TRAMPOLINE_32BIT_CODE_SIZE 0x70
#define TRAMPOLINE_32BIT_STACK_END TRAMPOLINE_32BIT_SIZE

3
arch/x86/include/asm/intel-family.h
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@ -6,7 +6,7 @@
* "Big Core" Processors (Branded as Core, Xeon, etc...)
*
* The "_X" parts are generally the EP and EX Xeons, or the
* "Extreme" ones, like Broadwell-E.
* "Extreme" ones, like Broadwell-E, or Atom microserver.
*
* While adding a new CPUID for a new microarchitecture, add a new
* group to keep logically sorted out in chronological order. Within
@ -71,6 +71,7 @@
#define INTEL_FAM6_ATOM_GOLDMONT 0x5C /* Apollo Lake */
#define INTEL_FAM6_ATOM_GOLDMONT_X 0x5F /* Denverton */
#define INTEL_FAM6_ATOM_GOLDMONT_PLUS 0x7A /* Gemini Lake */
#define INTEL_FAM6_ATOM_TREMONT_X 0x86 /* Jacobsville */
/* Xeon Phi */

4
arch/x86/include/asm/resctrl_sched.h
View File

@ -2,7 +2,7 @@
#ifndef _ASM_X86_RESCTRL_SCHED_H
#define _ASM_X86_RESCTRL_SCHED_H
#ifdef CONFIG_X86_RESCTRL
#ifdef CONFIG_X86_CPU_RESCTRL
#include <linux/sched.h>
#include <linux/jump_label.h>
@ -88,6 +88,6 @@ static inline void resctrl_sched_in(void)
static inline void resctrl_sched_in(void) {}
#endif /* CONFIG_X86_RESCTRL */
#endif /* CONFIG_X86_CPU_RESCTRL */
#endif /* _ASM_X86_RESCTRL_SCHED_H */

2
arch/x86/kernel/cpu/Makefile
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@ -39,7 +39,7 @@ obj-$(CONFIG_CPU_SUP_UMC_32) += umc.o
obj-$(CONFIG_X86_MCE) += mce/
obj-$(CONFIG_MTRR) += mtrr/
obj-$(CONFIG_MICROCODE) += microcode/
obj-$(CONFIG_X86_RESCTRL) += resctrl/
obj-$(CONFIG_X86_CPU_RESCTRL) += resctrl/
obj-$(CONFIG_X86_LOCAL_APIC) += perfctr-watchdog.o

2
arch/x86/kernel/cpu/microcode/amd.c
View File

@ -855,7 +855,7 @@ load_microcode_amd(bool save, u8 family, const u8 *data, size_t size)
if (!p) {
return ret;
} else {
if (boot_cpu_data.microcode == p->patch_id)
if (boot_cpu_data.microcode >= p->patch_id)
return ret;
ret = UCODE_NEW;

4
arch/x86/kernel/cpu/resctrl/Makefile
View File

@ -1,4 +1,4 @@
# SPDX-License-Identifier: GPL-2.0
obj-$(CONFIG_X86_RESCTRL) += core.o rdtgroup.o monitor.o
obj-$(CONFIG_X86_RESCTRL) += ctrlmondata.o pseudo_lock.o
obj-$(CONFIG_X86_CPU_RESCTRL) += core.o rdtgroup.o monitor.o
obj-$(CONFIG_X86_CPU_RESCTRL) += ctrlmondata.o pseudo_lock.o
CFLAGS_pseudo_lock.o = -I$(src)

3
arch/x86/kernel/kexec-bzimage64.c
View File

@ -167,6 +167,9 @@ setup_efi_state(struct boot_params *params, unsigned long params_load_addr,
struct efi_info *current_ei = &boot_params.efi_info;
struct efi_info *ei = &params->efi_info;
if (!efi_enabled(EFI_RUNTIME_SERVICES))
return 0;
if (!current_ei->efi_memmap_size)
return 0;

2
arch/x86/mm/fault.c
View File

@ -595,7 +595,7 @@ static void show_ldttss(const struct desc_ptr *gdt, const char *name, u16 index)
return;
}
addr = desc.base0 | (desc.base1 << 16) | (desc.base2 << 24);
addr = desc.base0 | (desc.base1 << 16) | ((unsigned long)desc.base2 << 24);
#ifdef CONFIG_X86_64
addr |= ((u64)desc.base3 << 32);
#endif

2
include/linux/sched.h
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@ -995,7 +995,7 @@ struct task_struct {
/* cg_list protected by css_set_lock and tsk->alloc_lock: */
struct list_head cg_list;
#endif
#ifdef CONFIG_X86_RESCTRL
#ifdef CONFIG_X86_CPU_RESCTRL
u32 closid;
u32 rmid;
#endif