linux.git/tools/arch, branch v7.2-rc5 Linux kernel source tree tools headers: Sync KVM headers with the kernel sources 2026-07-22T00:00:10+00:00 Arnaldo Carvalho de Melo acme@redhat.com 2026-06-25T16:02:16+00:00 fac520e43a60230b24026f462a2b63e4d170566e To pick up the changes in: 103ff3a50e3a50a9 ("KVM: s390: Add capability to support 2G hugepages") 229132c309d667bb ("LoongArch: KVM: Add DMSINTC device support") 2619da73bb2f10d8 ("KVM: x86: Use __DECLARE_FLEX_ARRAY() for UAPI structures with VLAs") 4aebd7d5c72f805e ("KVM: s390: Add KVM capability for ESA mode guests") 4f256d5770febb9d ("KVM: x86: nSVM: Save/restore gPAT with KVM_{GET,SET}_NESTED_STATE") 822790ab01495d67 ("KVM: x86: Define KVM_X86_QUIRK_NESTED_SVM_SHARED_PAT") 8800dbf6614aad10 ("KVM: arm64: Allow userspace to create protected VMs when pKVM is enabled") bf8f3cec939db68e ("KVM: s390: vsie: Refactor handle_stfle") c547c51ff4d44c78 ("KVM: arm64: gic-v5: Add ARM_VGIC_V5 device to KVM headers") d7507a94a0720223 ("KVM: SVM: Treat exit_code as an unsigned 64-bit value through all of KVM") This addresses these perf build warnings: Warning: Kernel ABI header differences: diff -u tools/include/uapi/linux/kvm.h include/uapi/linux/kvm.h diff -u tools/arch/x86/include/uapi/asm/kvm.h arch/x86/include/uapi/asm/kvm.h diff -u tools/arch/x86/include/uapi/asm/svm.h arch/x86/include/uapi/asm/svm.h diff -u tools/arch/s390/include/uapi/asm/kvm.h arch/s390/include/uapi/asm/kvm.h Please see tools/include/uapi/README for further details. Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> 
To pick up the changes in:

  103ff3a50e3a50a9 ("KVM: s390: Add capability to support 2G hugepages")
  229132c309d667bb ("LoongArch: KVM: Add DMSINTC device support")
  2619da73bb2f10d8 ("KVM: x86: Use __DECLARE_FLEX_ARRAY() for UAPI structures with VLAs")
  4aebd7d5c72f805e ("KVM: s390: Add KVM capability for ESA mode guests")
  4f256d5770febb9d ("KVM: x86: nSVM: Save/restore gPAT with KVM_{GET,SET}_NESTED_STATE")
  822790ab01495d67 ("KVM: x86: Define KVM_X86_QUIRK_NESTED_SVM_SHARED_PAT")
  8800dbf6614aad10 ("KVM: arm64: Allow userspace to create protected VMs when pKVM is enabled")
  bf8f3cec939db68e ("KVM: s390: vsie: Refactor handle_stfle")
  c547c51ff4d44c78 ("KVM: arm64: gic-v5: Add ARM_VGIC_V5 device to KVM headers")
  d7507a94a0720223 ("KVM: SVM: Treat exit_code as an unsigned 64-bit value through all of KVM")

This addresses these perf build warnings:

  Warning: Kernel ABI header differences:
    diff -u tools/include/uapi/linux/kvm.h include/uapi/linux/kvm.h
    diff -u tools/arch/x86/include/uapi/asm/kvm.h arch/x86/include/uapi/asm/kvm.h
    diff -u tools/arch/x86/include/uapi/asm/svm.h arch/x86/include/uapi/asm/svm.h
    diff -u tools/arch/s390/include/uapi/asm/kvm.h arch/s390/include/uapi/asm/kvm.h

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

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
tools arch x86: Sync the msr-index.h copy with the kernel sources 2026-07-22T00:00:09+00:00 Arnaldo Carvalho de Melo acme@redhat.com 2026-06-25T16:02:13+00:00 df3f28cd6861dcbdaab2d3025048eaaf950b1486 To pick up the changes in: e93a93f11490992a ("KVM: x86: Virtualize AMD CPUID faulting") That introduce these new entries in the string tables: $ 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 @@ -349,6 +349,7 @@ [0xc00102b2 - x86_AMD_V_KVM_MSRs_offset] = "AMD_CPPC_CAP2", [0xc00102b3 - x86_AMD_V_KVM_MSRs_offset] = "AMD_CPPC_REQ", [0xc00102b4 - x86_AMD_V_KVM_MSRs_offset] = "AMD_CPPC_STATUS", + [0xc00102b5 - x86_AMD_V_KVM_MSRs_offset] = "AMD_CPPC_REQ2", [0xc00102f0 - x86_AMD_V_KVM_MSRs_offset] = "AMD_PPIN_CTL", [0xc00102f1 - x86_AMD_V_KVM_MSRs_offset] = "AMD_PPIN", [0xc0010300 - x86_AMD_V_KVM_MSRs_offset] = "AMD_SAMP_BR_FROM", This addresses 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 Please see tools/include/uapi/README for further details. Cc: Jim Mattson <jmattson@google.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> 
To pick up the changes in:

  e93a93f11490992a ("KVM: x86: Virtualize AMD CPUID faulting")

That introduce these new entries in the string tables:

  $ 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
  @@ -349,6 +349,7 @@
   	[0xc00102b2 - x86_AMD_V_KVM_MSRs_offset] = "AMD_CPPC_CAP2",
   	[0xc00102b3 - x86_AMD_V_KVM_MSRs_offset] = "AMD_CPPC_REQ",
   	[0xc00102b4 - x86_AMD_V_KVM_MSRs_offset] = "AMD_CPPC_STATUS",
  +	[0xc00102b5 - x86_AMD_V_KVM_MSRs_offset] = "AMD_CPPC_REQ2",
   	[0xc00102f0 - x86_AMD_V_KVM_MSRs_offset] = "AMD_PPIN_CTL",
   	[0xc00102f1 - x86_AMD_V_KVM_MSRs_offset] = "AMD_PPIN",
   	[0xc0010300 - x86_AMD_V_KVM_MSRs_offset] = "AMD_SAMP_BR_FROM",

This addresses 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

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

Cc: Jim Mattson <jmattson@google.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
tools headers x86 cpufeatures: Sync with the kernel sources 2026-07-22T00:00:09+00:00 Arnaldo Carvalho de Melo acme@redhat.com 2026-06-25T16:02:10+00:00 e619443bcc393f4e1c249393d19e6ec837f5c424 To pick up the changes in: 5ce9cc5a232b9928 ("coco/tdx-host: Don't expose P-SEAMLDR information on CPUs with erratum") 7658b9343a8f65e5 ("KVM: SVM: add GMET bit definitions") de0bfdc7137d5132 ("KVM: x86: Advertise AVX512 Bit Matrix Multiply (BMM) to userspace") That just rebuilds perf, silencing this build warning. This 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: Chao Gao <chao.gao@intel.com> Cc: Nikunj A Dadhania <nikunj@amd.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> 
To pick up the changes in:

  5ce9cc5a232b9928 ("coco/tdx-host: Don't expose P-SEAMLDR information on CPUs with erratum")
  7658b9343a8f65e5 ("KVM: SVM: add GMET bit definitions")
  de0bfdc7137d5132 ("KVM: x86: Advertise AVX512 Bit Matrix Multiply (BMM) to userspace")

That just rebuilds perf, silencing this build warning.

This 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: Chao Gao <chao.gao@intel.com>
Cc: Nikunj A Dadhania <nikunj@amd.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Merge tag 'perf-tools-for-v7.2-1-2026-06-22' of git://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools 2026-06-23T18:34:49+00:00 Linus Torvalds torvalds@linux-foundation.org 2026-06-23T18:34:49+00:00 05d2a3da153bc08c5fe7937584b5d86505747b9e Pull perf tools updates from Arnaldo Carvalho de Melo: - Introduce 'perf inject --aslr' to remap ASLR-randomized addresses in perf.data files, enabling reproducible analysis across runs with different address space layouts - Refactor evsel out of sample processing paths: store evsel in struct perf_sample and remove the redundant evsel parameter from tool APIs, tracepoint handlers, hist entry iterators, and db-export, simplifying the entire tool callback chain - Switch architecture detection from string-based perf_env__arch() comparisons to the numeric ELF e_machine field across the codebase (capstone, print_insn, c2c, lock-contention, sort, sample-raw, machine, header), making cross-analysis more robust - Overhaul ARM CoreSight ETM tests: add deterministic and named_threads workloads, speed up basic and disassembly tests, add process attribution and concurrent threads tests, remove unused workloads and duplicate tests, queue context packets for the frontend decoder - Add ARM SPE IMPDEF event decoding for Arm Neoverse N1, store MIDR in arm_spe_pkt for per-CPU event mapping, handle missing CPU IDs gracefully - Refactor libunwind support: remove the libunwind-local backend, make register reading cross-platform, add RISC-V libunwind support, allow dynamic selection between libdw and libunwind unwinding at runtime - Extensive hardening of perf.data parsing against crafted files: add bounds checks and byte-swap validation for session records, feature sections, header attributes, BPF metadata, auxtrace errors, compressed events, CPU maps, build ID notes, and ELF program headers. Add minimum event size validation and file offset diagnostics - Fix libdw API contract violations across dwarf-aux, libdw, probe-finder, annotate-data, and debuginfo subsystems. Fix callchain parent update in ORDER_CALLER mode, support DWARF line 0 in inline lists, handle multiple address spaces in callchains - Fix numerous 'perf sched' bugs: thread reference leaks, memory leaks, heap overflows with cross-machine recordings, NULL dereferences, replace BUG_ON assertions with graceful error handling, bounds-check CPU indices, fix SIGCHLD vs pause() races in sched stats - Overhaul the build system: move BPF skeleton generation out of Makefile.perf into bpf_skel.mak, decouple pmu-events from the prepare target, make beauty generated C code standalone .o files, compile BPF skeletons with -mcpu=v3, fix continuous rebuilds, various cleanups - Add 'perf test' JUnit XML reporting with -j/--junit option, split monolithic test suites into sub-tests, add summary reporting, refactor parallel poll loop, fix test failures on musl-based systems - Fix 'perf c2c' memory leaks in hist entry and format list handling, use-after-free in error paths, bounds-check CPU and node IDs - Fix 'perf bpf' metadata leaks on duplicate insert and alloc failure, bounds-check array offsets, validate event sizes and func_info fields, add NULL checks - Fix hwmon PMU: off-by-one null termination on sysfs reads, strlcpy buffer overflow in parse_hwmon_filename(), fd 0 check, empty label reads, scnprintf usage - Fix symbols subsystem: bounds-check ELF and sysfs build ID note iteration, validate p_filesz, fix 32-bit ELF bswap error, fix signed overflow in size checks, bounds-check .gnu_debuglink section - Fix tools lib api: null termination in filename__read_int/ull(), uninitialized stack data in filename__write_int(), snprintf truncation in mount_overload() - Replace libbabeltrace with babeltrace2-ctf-writer for CTF conversion in 'perf data' - Add RISC-V SDT argument parsing for static tracepoints - Add 'perf trace --show-cpu' option to display CPU id - Add 'perf bench sched pipe --write-size' option - Add a perf-specific .clang-format that overrides some kernel style behaviors - Update Intel vendor events for Alder Lake, Arrow Lake, Clearwater Forest, Emerald Rapids, Granite Rapids, Grand Ridge, Lunar Lake, Meteor Lake, Panther Lake, Sapphire Rapids, Sierra Forest - Add IOMMU metrics for AMD and Intel - Fix AMD event: switch l2_itlb_misses to bp_l1_tlb_miss_l2_tlb_miss.all - Add AMD IBS improvements: decode Streaming-store and Remote-Socket flags, suppress bogus fields on Zen4+, skip privilege test on Zen6+ - Fix 'perf lock contention' SIGCHLD vs pause() race, allow 'mmap_lock' in -L filter, enable end-timestamp for cgroup aggregation, fix non-atomic data updates - Fix 'perf stat' false NMI watchdog warning in aggregation modes, bounds-check CPU index in topology callbacks, add aggr_nr metric parser support for uncore scaling - Fix 'perf timechart' memory leaks, CPU bounds checking, use-after-free on corrupted callchains - Fix 'perf inject' itrace branch stack synthesis, fix synthesized sample size with branch stacks - Fix DSO heap overflow on decompressed paths, uninitialized pathname on fallback, set proper error codes - Fix various snprintf/scnprintf usages to prevent buffer overflows and truncation across the codebase - Fix off-by-one stack buffer overflow in kallsyms__parse() - Fix 'perf kwork' memory management, address sanitizer issues, bounds check work->cpu - Fix 'perf tpebs' concurrent stop races and PID reuse hazards - Add O_CLOEXEC to open() calls and use mkostemp() for temporary files to prevent file descriptor leaks to child processes - Fix s390 Python extension TEXTREL by compiling as PIC - Fix build with ASAN for jitdump - Fix build failure due to btf_vlen() return type change * tag 'perf-tools-for-v7.2-1-2026-06-22' of git://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools: (343 commits) perf bpf: Fix up build failure due to change of btf_vlen() return type perf dso: Set standard errno on decompression failure perf bpf: Validate array presence before casting BPF prog info pointers perf c2c: Fix hist entry and format list leaks in c2c_he_free() perf c2c: Free format list entries when c2c_hists__init() fails perf cs-etm: Bounds-check CPU in cs_etm__get_queue() perf cs-etm: Require full global header in auxtrace_info size check perf cs-etm: Validate num_cpu before metadata allocation perf machine: Use snprintf() for guestmount path construction perf machine: Propagate machine__init() error to callers perf trace: Guard __probe_ip suppression with evsel__is_probe() perf evsel: Add lazy-initialized probe type detection helpers perf evsel: Add no-libtraceevent stubs for evsel__field() and evsel__common_field() perf cs-etm: Reject CPU IDs that would overflow signed comparison perf c2c: Free format list entries when releasing c2c hist entries perf bpf: Bounds-check array offsets in bpil_offs_to_addr() perf bpf: Reject oversized BPF metadata events that truncate header.size perf bpf: Validate func_info_rec_size and sub_id in synthesize_bpf_prog_name() perf sched: Replace (void*)1 sentinel with proper runtime allocation perf hwmon: Fix fd check to accept fd 0 in hwmon_pmu__describe_items() ... 
Pull perf tools updates from Arnaldo Carvalho de Melo:

 - Introduce 'perf inject --aslr' to remap ASLR-randomized addresses in
   perf.data files, enabling reproducible analysis across runs with
   different address space layouts

 - Refactor evsel out of sample processing paths: store evsel in struct
   perf_sample and remove the redundant evsel parameter from tool APIs,
   tracepoint handlers, hist entry iterators, and db-export, simplifying
   the entire tool callback chain

 - Switch architecture detection from string-based perf_env__arch()
   comparisons to the numeric ELF e_machine field across the codebase
   (capstone, print_insn, c2c, lock-contention, sort, sample-raw,
   machine, header), making cross-analysis more robust

 - Overhaul ARM CoreSight ETM tests: add deterministic and named_threads
   workloads, speed up basic and disassembly tests, add process
   attribution and concurrent threads tests, remove unused workloads and
   duplicate tests, queue context packets for the frontend decoder

 - Add ARM SPE IMPDEF event decoding for Arm Neoverse N1, store MIDR in
   arm_spe_pkt for per-CPU event mapping, handle missing CPU IDs
   gracefully

 - Refactor libunwind support: remove the libunwind-local backend, make
   register reading cross-platform, add RISC-V libunwind support, allow
   dynamic selection between libdw and libunwind unwinding at runtime

 - Extensive hardening of perf.data parsing against crafted files: add
   bounds checks and byte-swap validation for session records, feature
   sections, header attributes, BPF metadata, auxtrace errors,
   compressed events, CPU maps, build ID notes, and ELF program headers.
   Add minimum event size validation and file offset diagnostics

 - Fix libdw API contract violations across dwarf-aux, libdw,
   probe-finder, annotate-data, and debuginfo subsystems. Fix callchain
   parent update in ORDER_CALLER mode, support DWARF line 0 in inline
   lists, handle multiple address spaces in callchains

 - Fix numerous 'perf sched' bugs: thread reference leaks, memory leaks,
   heap overflows with cross-machine recordings, NULL dereferences,
   replace BUG_ON assertions with graceful error handling, bounds-check
   CPU indices, fix SIGCHLD vs pause() races in sched stats

 - Overhaul the build system: move BPF skeleton generation out of
   Makefile.perf into bpf_skel.mak, decouple pmu-events from the prepare
   target, make beauty generated C code standalone .o files, compile BPF
   skeletons with -mcpu=v3, fix continuous rebuilds, various cleanups

 - Add 'perf test' JUnit XML reporting with -j/--junit option, split
   monolithic test suites into sub-tests, add summary reporting,
   refactor parallel poll loop, fix test failures on musl-based systems

 - Fix 'perf c2c' memory leaks in hist entry and format list handling,
   use-after-free in error paths, bounds-check CPU and node IDs

 - Fix 'perf bpf' metadata leaks on duplicate insert and alloc failure,
   bounds-check array offsets, validate event sizes and func_info
   fields, add NULL checks

 - Fix hwmon PMU: off-by-one null termination on sysfs reads, strlcpy
   buffer overflow in parse_hwmon_filename(), fd 0 check, empty label
   reads, scnprintf usage

 - Fix symbols subsystem: bounds-check ELF and sysfs build ID note
   iteration, validate p_filesz, fix 32-bit ELF bswap error, fix signed
   overflow in size checks, bounds-check .gnu_debuglink section

 - Fix tools lib api: null termination in filename__read_int/ull(),
   uninitialized stack data in filename__write_int(), snprintf
   truncation in mount_overload()

 - Replace libbabeltrace with babeltrace2-ctf-writer for CTF conversion
   in 'perf data'

 - Add RISC-V SDT argument parsing for static tracepoints

 - Add 'perf trace --show-cpu' option to display CPU id

 - Add 'perf bench sched pipe --write-size' option

 - Add a perf-specific .clang-format that overrides some kernel style
   behaviors

 - Update Intel vendor events for Alder Lake, Arrow Lake, Clearwater
   Forest, Emerald Rapids, Granite Rapids, Grand Ridge, Lunar Lake,
   Meteor Lake, Panther Lake, Sapphire Rapids, Sierra Forest

 - Add IOMMU metrics for AMD and Intel

 - Fix AMD event: switch l2_itlb_misses to
   bp_l1_tlb_miss_l2_tlb_miss.all

 - Add AMD IBS improvements: decode Streaming-store and Remote-Socket
   flags, suppress bogus fields on Zen4+, skip privilege test on Zen6+

 - Fix 'perf lock contention' SIGCHLD vs pause() race, allow 'mmap_lock'
   in -L filter, enable end-timestamp for cgroup aggregation, fix
   non-atomic data updates

 - Fix 'perf stat' false NMI watchdog warning in aggregation modes,
   bounds-check CPU index in topology callbacks, add aggr_nr metric
   parser support for uncore scaling

 - Fix 'perf timechart' memory leaks, CPU bounds checking,
   use-after-free on corrupted callchains

 - Fix 'perf inject' itrace branch stack synthesis, fix synthesized
   sample size with branch stacks

 - Fix DSO heap overflow on decompressed paths, uninitialized pathname
   on fallback, set proper error codes

 - Fix various snprintf/scnprintf usages to prevent buffer overflows and
   truncation across the codebase

 - Fix off-by-one stack buffer overflow in kallsyms__parse()

 - Fix 'perf kwork' memory management, address sanitizer issues, bounds
   check work->cpu

 - Fix 'perf tpebs' concurrent stop races and PID reuse hazards

 - Add O_CLOEXEC to open() calls and use mkostemp() for temporary files
   to prevent file descriptor leaks to child processes

 - Fix s390 Python extension TEXTREL by compiling as PIC

 - Fix build with ASAN for jitdump

 - Fix build failure due to btf_vlen() return type change

* tag 'perf-tools-for-v7.2-1-2026-06-22' of git://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools: (343 commits)
  perf bpf: Fix up build failure due to change of btf_vlen() return type
  perf dso: Set standard errno on decompression failure
  perf bpf: Validate array presence before casting BPF prog info pointers
  perf c2c: Fix hist entry and format list leaks in c2c_he_free()
  perf c2c: Free format list entries when c2c_hists__init() fails
  perf cs-etm: Bounds-check CPU in cs_etm__get_queue()
  perf cs-etm: Require full global header in auxtrace_info size check
  perf cs-etm: Validate num_cpu before metadata allocation
  perf machine: Use snprintf() for guestmount path construction
  perf machine: Propagate machine__init() error to callers
  perf trace: Guard __probe_ip suppression with evsel__is_probe()
  perf evsel: Add lazy-initialized probe type detection helpers
  perf evsel: Add no-libtraceevent stubs for evsel__field() and evsel__common_field()
  perf cs-etm: Reject CPU IDs that would overflow signed comparison
  perf c2c: Free format list entries when releasing c2c hist entries
  perf bpf: Bounds-check array offsets in bpil_offs_to_addr()
  perf bpf: Reject oversized BPF metadata events that truncate header.size
  perf bpf: Validate func_info_rec_size and sub_id in synthesize_bpf_prog_name()
  perf sched: Replace (void*)1 sentinel with proper runtime allocation
  perf hwmon: Fix fd check to accept fd 0 in hwmon_pmu__describe_items()
  ...
Merge tag 'x86-cpu-2026-06-14' of gitolite.kernel.org:pub/scm/linux/kernel/git/tip/tip 2026-06-15T09:55:17+00:00 Linus Torvalds torvalds@linux-foundation.org 2026-06-15T09:55:17+00:00 ff5ccdb8d5bd242f1064c6f7996603e47e28d095 Pull x86 cpuid updates from Ingo Molnar: - CPUID API updates (Ahmed S. Darwish): - Introduce a centralized CPUID parser - Introduce a centralized CPUID data model - Introduce <asm/cpuid/leaf_types.h> - Rename cpuid_leaf()/cpuid_subleaf() APIs - treewide: Explicitly include the x86 CPUID headers - Update to x86-cpuid-db v3.1 (Maciej Wieczor-Retman) - Continued removal of pre-i586 support and related simplifications (Ingo Molnar) - Add Intel CPU model number for rugged Panther Lake (Tony Luck) - Misc fixes, updates and cleanups by Arnd Bergmann, Chao Gao, Lukas Bulwahn, Sohil Mehta, Maciej Wieczor-Retman. * tag 'x86-cpu-2026-06-14' of gitolite.kernel.org:pub/scm/linux/kernel/git/tip/tip: (25 commits) x86/cpu: Make CONFIG_X86_CX8 unconditional x86/cpu: Remove unused !CONFIG_X86_TSC code x86/cpuid: Update bitfields to x86-cpuid-db v3.1 tools/x86/kcpuid: Update bitfields to x86-cpuid-db v3.1 x86/cpu: Make CONFIG_X86_TSC unconditional MAINTAINERS: Drop obsolete FPU EMULATOR section x86/cpu: Fix a F00F bug warning and clean up surrounding code x86/cpu: Add Intel CPU model number for rugged Panther Lake x86/cpuid: Introduce a centralized CPUID parser x86/cpu: Introduce a centralized CPUID data model x86/cpuid: Introduce <asm/cpuid/leaf_types.h> x86/cpuid: Rename cpuid_leaf()/cpuid_subleaf() APIs x86/cpu: Do not include the CPUID API header in asm/processor.h Documentation: core-api/cpu_hotplug: Remove stale cpu0_hotplug docs x86/cpu, cpufreq: Remove AMD ELAN support x86/fpu: Remove the math-emu/ FPU emulation library x86/fpu: Remove the 'no387' boot option x86/fpu: Remove MATH_EMULATION and related glue code treewide: Explicitly include the x86 CPUID headers x86/cpu: Remove the CONFIG_X86_INVD_BUG quirk ... 
Pull x86 cpuid updates from Ingo Molnar:

 - CPUID API updates (Ahmed S. Darwish):
    - Introduce a centralized CPUID parser
    - Introduce a centralized CPUID data model
    - Introduce <asm/cpuid/leaf_types.h>
    - Rename cpuid_leaf()/cpuid_subleaf() APIs
    - treewide: Explicitly include the x86 CPUID headers

 - Update to x86-cpuid-db v3.1 (Maciej Wieczor-Retman)

 - Continued removal of pre-i586 support and related simplifications
   (Ingo Molnar)

 - Add Intel CPU model number for rugged Panther Lake (Tony Luck)

 - Misc fixes, updates and cleanups by Arnd Bergmann, Chao Gao, Lukas
   Bulwahn, Sohil Mehta, Maciej Wieczor-Retman.

* tag 'x86-cpu-2026-06-14' of gitolite.kernel.org:pub/scm/linux/kernel/git/tip/tip: (25 commits)
  x86/cpu: Make CONFIG_X86_CX8 unconditional
  x86/cpu: Remove unused !CONFIG_X86_TSC code
  x86/cpuid: Update bitfields to x86-cpuid-db v3.1
  tools/x86/kcpuid: Update bitfields to x86-cpuid-db v3.1
  x86/cpu: Make CONFIG_X86_TSC unconditional
  MAINTAINERS: Drop obsolete FPU EMULATOR section
  x86/cpu: Fix a F00F bug warning and clean up surrounding code
  x86/cpu: Add Intel CPU model number for rugged Panther Lake
  x86/cpuid: Introduce a centralized CPUID parser
  x86/cpu: Introduce a centralized CPUID data model
  x86/cpuid: Introduce <asm/cpuid/leaf_types.h>
  x86/cpuid: Rename cpuid_leaf()/cpuid_subleaf() APIs
  x86/cpu: Do not include the CPUID API header in asm/processor.h
  Documentation: core-api/cpu_hotplug: Remove stale cpu0_hotplug docs
  x86/cpu, cpufreq: Remove AMD ELAN support
  x86/fpu: Remove the math-emu/ FPU emulation library
  x86/fpu: Remove the 'no387' boot option
  x86/fpu: Remove MATH_EMULATION and related glue code
  treewide: Explicitly include the x86 CPUID headers
  x86/cpu: Remove the CONFIG_X86_INVD_BUG quirk
  ...
Merge tag 'vfs-7.2-rc1.openat2' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs 2026-06-14T21:41:05+00:00 Linus Torvalds torvalds@linux-foundation.org 2026-06-14T21:41:05+00:00 50b900c564b0f0307c126de9f17c21d3a1ba039b Pull openat2 updates from Christian Brauner: "Features: - Add O_EMPTYPATH to openat(2)/openat2(2). To get an operable file descriptor from an O_PATH file descriptor it is possible to use openat(fd, ".", O_DIRECTORY) for directories, but other file types require going through open("/proc/<pid>/fd/<nr>") and thus depend on a functioning procfs. With O_EMPTYPATH an empty path string is accepted and LOOKUP_EMPTY is set at path resolution time, allowing to reopen the file behind the file descriptor directly. Selftests are included. - Add an OPENAT2_REGULAR flag for openat2(2) which refuses to open anything but regular files with the new EFTYPE error code. This implements the "ability to only open regular files" feature requested by userspace via uapi-group.org and protects services from being redirected to fifos, device nodes, and friends. All atomic_open implementations were audited for OPENAT2_REGULAR handling. Explicit checks were added to ceph, gfs2, nfs (v4), and cifs/smb - these are the filesystems whose atomic_open can encounter an existing non-regular file and would otherwise call finish_open() on it or return a misleading error code. The remaining implementations (9p, fuse, vboxsf, nfs v2/v3) only call finish_open() on freshly created files and use finish_no_open() for lookup hits, letting the VFS catch non-regular files via the do_open() safety net. Cleanups: - Migrate the openat2 selftests to the kselftest harness and move them under selftests/filesystems/. The tests were written in the early days of selftests' TAP support and the modern kselftest harness is much easier to follow and maintain. The contents of the tests are unchanged and the new emptypath tests are ported on top. - Make the LAST_XXX last-type constants private to fs/namei.c. The only user outside of fs/namei.c was ksmbd which only needs to know whether the last component is a regular one, so vfs_path_parent_lookup() now performs the LAST_NORM check internally. The ints are replaced with a dedicated enum last_type" * tag 'vfs-7.2-rc1.openat2' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs: vfs: replace ints with enum last_type for LAST_XXX vfs: make LAST_XXX private to fs/namei.c selftests: openat2: port emptypath_test to kselftest harness kselftest/openat2: test for OPENAT2_REGULAR flag openat2: new OPENAT2_REGULAR flag support openat2: introduce EFTYPE error code selftest: add tests for O_EMPTYPATH vfs: add O_EMPTYPATH to openat(2)/openat2(2) selftests: openat2: migrate to kselftest harness selftests: openat2: switch from custom ARRAY_LEN to ARRAY_SIZE selftests: openat2: move helpers to header selftests: move openat2 tests to selftests/filesystems/ 
Pull openat2 updates from Christian Brauner:
 "Features:

   - Add O_EMPTYPATH to openat(2)/openat2(2). To get an operable file
     descriptor from an O_PATH file descriptor it is possible to use
     openat(fd, ".", O_DIRECTORY) for directories, but other file types
     require going through open("/proc/<pid>/fd/<nr>") and thus depend
     on a functioning procfs.

     With O_EMPTYPATH an empty path string is accepted and LOOKUP_EMPTY
     is set at path resolution time, allowing to reopen the file behind
     the file descriptor directly. Selftests are included.

   - Add an OPENAT2_REGULAR flag for openat2(2) which refuses to open
     anything but regular files with the new EFTYPE error code.

     This implements the "ability to only open regular files" feature
     requested by userspace via uapi-group.org and protects services
     from being redirected to fifos, device nodes, and friends.

     All atomic_open implementations were audited for OPENAT2_REGULAR
     handling. Explicit checks were added to ceph, gfs2, nfs (v4), and
     cifs/smb - these are the filesystems whose atomic_open can
     encounter an existing non-regular file and would otherwise call
     finish_open() on it or return a misleading error code.

     The remaining implementations (9p, fuse, vboxsf, nfs v2/v3) only
     call finish_open() on freshly created files and use
     finish_no_open() for lookup hits, letting the VFS catch non-regular
     files via the do_open() safety net.

  Cleanups:

   - Migrate the openat2 selftests to the kselftest harness and move
     them under selftests/filesystems/. The tests were written in the
     early days of selftests' TAP support and the modern kselftest
     harness is much easier to follow and maintain. The contents of the
     tests are unchanged and the new emptypath tests are ported on top.

   - Make the LAST_XXX last-type constants private to fs/namei.c. The
     only user outside of fs/namei.c was ksmbd which only needs to know
     whether the last component is a regular one, so
     vfs_path_parent_lookup() now performs the LAST_NORM check
     internally. The ints are replaced with a dedicated enum last_type"

* tag 'vfs-7.2-rc1.openat2' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs:
  vfs: replace ints with enum last_type for LAST_XXX
  vfs: make LAST_XXX private to fs/namei.c
  selftests: openat2: port emptypath_test to kselftest harness
  kselftest/openat2: test for OPENAT2_REGULAR flag
  openat2: new OPENAT2_REGULAR flag support
  openat2: introduce EFTYPE error code
  selftest: add tests for O_EMPTYPATH
  vfs: add O_EMPTYPATH to openat(2)/openat2(2)
  selftests: openat2: migrate to kselftest harness
  selftests: openat2: switch from custom ARRAY_LEN to ARRAY_SIZE
  selftests: openat2: move helpers to header
  selftests: move openat2 tests to selftests/filesystems/
tools/x86/kcpuid: Update bitfields to x86-cpuid-db v3.1 2026-06-04T02:00:50+00:00 Maciej Wieczor-Retman maciej.wieczor-retman@intel.com 2026-06-03T17:10:49+00:00 bdf4d8280616308b5bb42babad1432ff4575cb8b Update kcpuid's CSV file to version 3.1, as generated by x86-cpuid-db. Summary of the v3.1 changes: * Fix a few typos that were found during the kernel CPUID data model review. Also include fixes found using an LLM agent review. * Rename thrd_director_nclasses to hw_feedback_nclasses as it's the name used in Intel SDM. See https://gitlab.com/x86-cpuid.org/x86-cpuid-db/-/blob/v3.1/CHANGELOG.rst for more info. Signed-off-by: Maciej Wieczor-Retman <maciej.wieczor-retman@intel.com> Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de> Link: https://patch.msgid.link/cbe9ff395b3269e112ff7ca414d726ffd7bf0787.1780506200.git.m.wieczorretman@pm.me 
Update kcpuid's CSV file to version 3.1, as generated by x86-cpuid-db.

Summary of the v3.1 changes:

* Fix a few typos that were found during the kernel CPUID data model
  review. Also include fixes found using an LLM agent review.

* Rename thrd_director_nclasses to hw_feedback_nclasses as it's the
  name used in Intel SDM.

See https://gitlab.com/x86-cpuid.org/x86-cpuid-db/-/blob/v3.1/CHANGELOG.rst
for more info.

Signed-off-by: Maciej Wieczor-Retman <maciej.wieczor-retman@intel.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://patch.msgid.link/cbe9ff395b3269e112ff7ca414d726ffd7bf0787.1780506200.git.m.wieczorretman@pm.me
perf tool ibs: Sync AMD IBS header file 2026-05-23T00:31:02+00:00 Ravi Bangoria ravi.bangoria@amd.com 2026-05-08T05:59:58+00:00 45bd2d77fbedec862204bb5c0fcaba2b7fa5fb56 IBS_OP_DATA2 register will have two more fields: strm_st and rmt_socket in Zen6 and future AMD platforms. Kernel header file is already updated. Add those fields in tools copy as well. Signed-off-by: Ravi Bangoria <ravi.bangoria@amd.com> Acked-by: Namhyung Kim <namhyung@kernel.org> Cc: Ananth Narayan <ananth.narayan@amd.com> Cc: Dapeng Mi <dapeng1.mi@linux.intel.com> Cc: Ian Rogers <irogers@google.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Clark <james.clark@linaro.org> Cc: Manali Shukla <manali.shukla@amd.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Sandipan Das <sandipan.das@amd.com> Cc: Santosh Shukla <santosh.shukla@amd.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> 
IBS_OP_DATA2 register will have two more fields: strm_st and rmt_socket
in Zen6 and future AMD platforms. Kernel header file is already updated.
Add those fields in tools copy as well.

Signed-off-by: Ravi Bangoria <ravi.bangoria@amd.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Ananth Narayan <ananth.narayan@amd.com>
Cc: Dapeng Mi <dapeng1.mi@linux.intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@linaro.org>
Cc: Manali Shukla <manali.shukla@amd.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Sandipan Das <sandipan.das@amd.com>
Cc: Santosh Shukla <santosh.shukla@amd.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
openat2: introduce EFTYPE error code 2026-05-21T08:53:41+00:00 Dorjoy Chowdhury dorjoychy111@gmail.com 2026-03-28T17:22:22+00:00 cf1b04aaef8b83f668fac10bfc4d4d76ba6e6fa1 Introduce a new error code EFTYPE for wrong file type operations. EFTYPE is already used in BSD systems like FreeBSD and macOS. This will be used by the upcoming OPENAT2_REGULAR flag support to return a specific error when a path doesn't refer to a regular file. Signed-off-by: Dorjoy Chowdhury <dorjoychy111@gmail.com> Link: https://patch.msgid.link/20260328172314.45807-2-dorjoychy111@gmail.com Reviewed-by: Jeff Layton <jlayton@kernel.org> Reviewed-by: Aleksa Sarai <aleksa@amutable.com> Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org> 
Introduce a new error code EFTYPE for wrong file type operations.
EFTYPE is already used in BSD systems like FreeBSD and macOS.

This will be used by the upcoming OPENAT2_REGULAR flag support to
return a specific error when a path doesn't refer to a regular file.

Signed-off-by: Dorjoy Chowdhury <dorjoychy111@gmail.com>
Link: https://patch.msgid.link/20260328172314.45807-2-dorjoychy111@gmail.com
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: Aleksa Sarai <aleksa@amutable.com>
Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org>
x86/CPU/AMD: Prevent improper isolation of shared resources in Zen2's op cache 2026-05-12T03:06:36+00:00 Prathyushi Nangia prathyushi.nangia@amd.com 2025-12-09T16:01:33+00:00 c21b90f77687075115d989e53a8ec5e2bb427ab1 Make sure resources are not improperly shared in the op cache and cause instruction corruption this way. Signed-off-by: Prathyushi Nangia <prathyushi.nangia@amd.com> Co-developed-by: Borislav Petkov (AMD) <bp@alien8.de> Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de> Cc: stable@vger.kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> 
Make sure resources are not improperly shared in the op cache and
cause instruction corruption this way.

Signed-off-by: Prathyushi Nangia <prathyushi.nangia@amd.com>
Co-developed-by: Borislav Petkov (AMD) <bp@alien8.de>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Cc: stable@vger.kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>