linux-toradex.git/tools/arch/x86/include/asm, branch master

tools arch x86: Sync the msr-index.h copy with the kernel sources

2026-03-22T21:31:54+00:00

To pick up the changes from these csets:

  9073428bb204d921 ("x86/sev: Allow IBPB-on-Entry feature for SNP guests")

That cause no changes to tooling as it doesn't include a new MSR to be
captured by the tools/perf/trace/beauty/tracepoints/x86_msr.sh script.

Just silences this perf build warning:

  Warning: Kernel ABI header differences:
    diff -u tools/arch/x86/include/asm/msr-index.h arch/x86/include/asm/msr-index.h

Cc: Borislav Petkov (AMD) 
Cc: Kim Phillips 
Signed-off-by: Arnaldo Carvalho de Melo

tools headers UAPI: Update tools' copy of linux/coresight-pmu.h

2026-03-05T20:28:44+00:00

To get the comment changes in this commit:

  171efc70097a9f5f ("x86/ibs: Fix typo in dc_l2tlb_miss comment")

This silences this perf build warning:

  Warning: Kernel ABI header differences:
    diff -u tools/arch/x86/include/asm/amd/ibs.h arch/x86/include/asm/amd/ibs.h

Signed-off-by: Arnaldo Carvalho de Melo

tools arch x86: Sync msr-index.h to pick MSR_{OMR_[0-3],CORE_PERF_GLOBAL_STATUS_SET}

2026-03-05T19:51:09+00:00

To pick up the changes in:

  4e955c08d6dc76fb ("perf/x86/intel: Support the 4 new OMR MSRs introduced in DMR and NVL")
  736a2dcfdae72483 ("x86/CPU/AMD: Simplify the spectral chicken fix")
  56bb2736975068cc ("KVM: x86/pmu: Load/put mediated PMU context when entering/exiting guest")

Addressing this tools/perf build warning:

  Warning: Kernel ABI header differences:
    diff -u tools/arch/x86/include/asm/msr-index.h arch/x86/include/asm/msr-index.h

That makes the beautification scripts to pick some new entries:

  $ tools/perf/trace/beauty/tracepoints/x86_msr.sh > before.txt
  $ cp arch/x86/include/asm/msr-index.h tools/arch/x86/include/asm/msr-index.h
  $ tools/perf/trace/beauty/tracepoints/x86_msr.sh > after.txt
  $ diff -u before.txt after.txt
  --- before.txt	2026-03-04 17:21:39.165956041 -0300
  +++ after.txt	2026-03-04 17:21:52.479191640 -0300
  @@ -130,6 +130,11 @@
   	[0x0000038e] = "CORE_PERF_GLOBAL_STATUS",
   	[0x0000038f] = "CORE_PERF_GLOBAL_CTRL",
   	[0x00000390] = "CORE_PERF_GLOBAL_OVF_CTRL",
  +	[0x00000391] = "CORE_PERF_GLOBAL_STATUS_SET",
  +	[0x000003e0] = "OMR_0",
  +	[0x000003e1] = "OMR_1",
  +	[0x000003e2] = "OMR_2",
  +	[0x000003e3] = "OMR_3",
   	[0x000003f1] = "IA32_PEBS_ENABLE",
   	[0x000003f2] = "PEBS_DATA_CFG",
   	[0x000003f4] = "IA32_PEBS_BASE",
  $

Now one can use those strings in 'perf trace' to do filtering, e.g.:

  # perf trace -e msr:*_msr/max-stack=32/ --filter="msr==CORE_PERF_GLOBAL_STATUS_SET"

Cc: Borislav Petkov (AMD) 
Cc: Dapeng Mi 
Cc: Peter Zijlstra 
Cc: Sean Christopherson 
Signed-off-by: Arnaldo Carvalho de Melo

tools headers x86 cpufeatures: Sync with the kernel sources

2026-03-04T15:50:31+00:00

To pick the changes from:

  f24ef0093dd8cf60 ("KVM: x86: Advertise MOVRS CPUID to userspace")
  f49ecf5e110ab0ed ("x86/cpufeature: Replace X86_FEATURE_SYSENTER32 with X86_FEATURE_SYSFAST32")
  db5e82496492b489 ("KVM: SVM: Virtualize and advertise support for ERAPS")

This causes these perf files to be rebuilt and brings some X86_FEATURE
that may be used by:

      CC       /tmp/build/perf/bench/mem-memcpy-x86-64-asm.o
      CC       /tmp/build/perf/bench/mem-memset-x86-64-asm.o

And addresses this perf build warning:

  Warning: Kernel ABI header differences:
    diff -u tools/arch/x86/include/asm/cpufeatures.h arch/x86/include/asm/cpufeatures.h

Please see tools/include/uapi/README for further details.

Cc: Amit Shah 
Cc: Dave Hansen 
Cc: H. Peter Anvin 
Cc: Sean Christopherson 
Cc: Zhao Liu 
Signed-off-by: Arnaldo Carvalho de Melo

Merge tag 'v6.19-rc6' into tip-x86-cleanups

2026-01-19T11:03:56+00:00

Pick up upstream work and

  d9b40d7262a2 ("selftests/x86: Add selftests include path for kselftest.h after centralization")

especially which is a build fix needed for a selftests cleanup coming
ontop of this.

Signed-off-by: Borislav Petkov (AMD)

x86/CPU/AMD: Simplify the spectral chicken fix

2026-01-09T10:36:52+00:00

msr_set_bit() takes a bit number to set but MSR_ZEN2_SPECTRAL_CHICKEN_BIT
is a bit mask. The usual pattern that code uses is a _BIT-named type
macro instead of a mask.

So convert it to a bit number to reflect that.

Also, msr_set_bit() already does the reading and checking whether the
bit needs to be set so use that instead of a local variable.

Fixup tabbing while at it.

No functional changes.

Signed-off-by: Borislav Petkov (AMD) 
Reviewed-by: Nikolay Borisov 
Link: https://patch.msgid.link/20251230110731.28108-1-bp@kernel.org

tools headers: Sync x86 headers with kernel sources

2025-12-24T19:43:04+00:00

To pick up changes from:

  54de197c9a5e8f52 ("Merge tag 'x86_sgx_for_6.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip")
  679fcce0028bf101 ("Merge tag 'kvm-x86-svm-6.19' of https://github.com/kvm-x86/linux into HEAD")
  3767def18f4cc394 ("x86/cpufeatures: Add support for L3 Smart Data Cache Injection Allocation Enforcement")
  f6106d41ec84e552 ("x86/bugs: Use an x86 feature to track the MMIO Stale Data mitigation")
  7baadd463e147fdc ("x86/cpufeatures: Enumerate the LASS feature bits")
  47955b58cf9b97fe ("x86/cpufeatures: Correct LKGS feature flag description")
  5d0316e25defee47 ("x86/cpufeatures: Add X86_FEATURE_X2AVIC_EXT")
  6ffdb49101f02313 ("x86/cpufeatures: Add X86_FEATURE_SGX_EUPDATESVN feature flag")
  4793f990ea152330 ("KVM: x86: Advertise EferLmsleUnsupported to userspace")
  bb5f13df3c455110 ("perf/x86/intel: Add counter group support for arch-PEBS")
  52448a0a739002ec ("perf/x86/intel: Setup PEBS data configuration and enable legacy groups")
  d21954c8a0ffbc94 ("perf/x86/intel: Process arch-PEBS records or record fragments")
  bffeb2fd0b9c99d8 ("x86/microcode/intel: Enable staging when available")
  740144bc6bde9d44 ("x86/microcode/intel: Establish staging control logic")

This should address these tools/perf build warnings:

  Warning: Kernel ABI header differences:
    diff -u tools/arch/x86/include/asm/cpufeatures.h arch/x86/include/asm/cpufeatures.h
    diff -u tools/arch/x86/include/asm/msr-index.h arch/x86/include/asm/msr-index.h

Please see tools/include/uapi/README.

Cc: x86@kernel.org
Signed-off-by: Namhyung Kim

Merge tag 'x86_cpu_for_6.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2025-12-02T22:48:08+00:00

Pull x86 CPU feature updates from Dave Hansen:
 "The biggest thing of note here is Linear Address Space Separation
  (LASS). It represents the first time I can think of that the
  upper=>kernel/lower=>user address space convention is actually
  recognized by the hardware on x86. It ensures that userspace can not
  even get the hardware to _start_ page walks for the kernel address
  space. This, of course, is a really nice generic side channel defense.

  This is really only a down payment on LASS support. There are still
  some details to work out in its interaction with EFI calls and
  vsyscall emulation. For now, LASS is disabled if either of those
  features is compiled in (which is almost always the case).

  There's also one straggler commit in here which converts an
  under-utilized AMD CPU feature leaf into a generic Linux-defined leaf
  so more feature can be packed in there.

  Summary:

   - Enable Linear Address Space Separation (LASS)

   - Change X86_FEATURE leaf 17 from an AMD leaf to Linux-defined"

* tag 'x86_cpu_for_6.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/cpu: Enable LASS during CPU initialization
  selftests/x86: Update the negative vsyscall tests to expect a #GP
  x86/traps: Communicate a LASS violation in #GP message
  x86/kexec: Disable LASS during relocate kernel
  x86/alternatives: Disable LASS when patching kernel code
  x86/asm: Introduce inline memcpy and memset
  x86/cpu: Add an LASS dependency on SMAP
  x86/cpufeatures: Enumerate the LASS feature bits
  x86/cpufeatures: Make X86_FEATURE leaf 17 Linux-specific

Merge tag 'x86_cleanups_for_v6.19_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2025-12-02T20:17:47+00:00

Pull x86 cleanups from Borislav Petkov:

 - The mandatory pile of cleanups the cat drags in every merge window

* tag 'x86_cleanups_for_v6.19_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/boot: Clean up whitespace in a20.c
  x86/mm: Delete disabled debug code
  x86/{boot,mtrr}: Remove unused function declarations
  x86/percpu: Use BIT_WORD() and BIT_MASK() macros
  x86/cpufeatures: Correct LKGS feature flag description
  x86/idtentry: Add missing '*' to kernel-doc lines

Merge tag 'perf-core-2025-12-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2025-12-02T04:42:01+00:00

Pull performance events updates from Ingo Molnar:
 "Callchain support:

   - Add support for deferred user-space stack unwinding for perf,
     enabled on x86. (Peter Zijlstra, Steven Rostedt)

   - unwind_user/x86: Enable frame pointer unwinding on x86 (Josh
     Poimboeuf)

  x86 PMU support and infrastructure:

   - x86/insn: Simplify for_each_insn_prefix() (Peter Zijlstra)

   - x86/insn,uprobes,alternative: Unify insn_is_nop() (Peter Zijlstra)

  Intel PMU driver:

   - Large series to prepare for and implement architectural PEBS
     support for Intel platforms such as Clearwater Forest (CWF) and
     Panther Lake (PTL). (Dapeng Mi, Kan Liang)

   - Check dynamic constraints (Kan Liang)

   - Optimize PEBS extended config (Peter Zijlstra)

   - cstates:
      - Remove PC3 support from LunarLake (Zhang Rui)
      - Add Pantherlake support (Zhang Rui)
      - Clearwater Forest support (Zide Chen)

  AMD PMU driver:

   - x86/amd: Check event before enable to avoid GPF (George Kennedy)

  Fixes and cleanups:

   - task_work: Fix NMI race condition (Peter Zijlstra)

   - perf/x86: Fix NULL event access and potential PEBS record loss
     (Dapeng Mi)

   - Misc other fixes and cleanups (Dapeng Mi, Ingo Molnar, Peter
     Zijlstra)"

* tag 'perf-core-2025-12-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (38 commits)
  perf/x86/intel: Fix and clean up intel_pmu_drain_arch_pebs() type use
  perf/x86/intel: Optimize PEBS extended config
  perf/x86/intel: Check PEBS dyn_constraints
  perf/x86/intel: Add a check for dynamic constraints
  perf/x86/intel: Add counter group support for arch-PEBS
  perf/x86/intel: Setup PEBS data configuration and enable legacy groups
  perf/x86/intel: Update dyn_constraint base on PEBS event precise level
  perf/x86/intel: Allocate arch-PEBS buffer and initialize PEBS_BASE MSR
  perf/x86/intel: Process arch-PEBS records or record fragments
  perf/x86/intel/ds: Factor out PEBS group processing code to functions
  perf/x86/intel/ds: Factor out PEBS record processing code to functions
  perf/x86/intel: Initialize architectural PEBS
  perf/x86/intel: Correct large PEBS flag check
  perf/x86/intel: Replace x86_pmu.drain_pebs calling with static call
  perf/x86: Fix NULL event access and potential PEBS record loss
  perf/x86: Remove redundant is_x86_event() prototype
  entry,unwind/deferred: Fix unwind_reset_info() placement
  unwind_user/x86: Fix arch=um build
  perf: Support deferred user unwind
  unwind_user/x86: Teach FP unwind about start of function
  ...