Performance events updates for v7.4

Linus,

Please pull the latest perf/core Git tree from:

git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git perf-core-2026-10-18

for you to fetch changes up to f5a78ecccd98a04c47cea1cd63c2a2fdce8a4b48:

Perf events updates:

- Support SIMD/eGPRs/SSP register sampling in perf (Dapeng Mi, Kan Liang)

- Turn amd_uncore_ctx events into a flexible array (Rosen Penev)

- Finish the work related to fixing the guest PEBS path to not set unwanted PERF_GLOBAL_CTRL bits, for which urgent fixes are upstream already (Sean Christopherson)

- Drop redundant counter slot searches in the AMD uncore driver (Usama Arif)

- Don't WARN when the ext_regs_buf allocation fails (vineash)

- Annotate x86_pmu::hybrid_pmu with __counted_by_ptr (Thorsten Blum)

Thanks,

Ingo

------------------>
Dapeng Mi (20):
perf/x86: Move hybrid PMU initialization before x86_pmu_starting_cpu() perf/x86/intel: Enable large PEBS sampling for XMMs perf/x86/intel: Convert x86_perf_regs to per-cpu variables
perf: Eliminate duplicate arch-specific function definitions perf/x86: Use x86_perf_regs in NMI handlers
x86/fpu: Add update_fpu_state_and_flag() helper perf/x86/intel: Centralize PERF_PMU_CAP_EXTENDED_REGS updates perf/x86: Enable XMM register sampling for non-PEBS events perf/x86: Enable XMM register sampling for REGS_USER case perf/x86: Support XMM sampling using sample_simd_vec_reg_* fields perf/x86: Support YMM sampling using sample_simd_vec_reg_* fields perf/x86: Support ZMM sampling using sample_simd_vec_reg_* fields perf/x86: Support OPMASK sampling using sample_simd_pred_reg_* fields
perf: Enhance perf_reg_validate() with simd_enabled argument perf/x86: Support eGPRs sampling using sample_regs_* fields perf/x86: Support SSP sampling using sample_regs_* fields perf/x86/intel: Support arch-PEBS based SIMD/eGPRs sampling perf/x86/intel: Advertise PERF_PMU_CAP_SIMD_REGS capability perf/x86: Activate back-to-back NMI detection for arch-PEBS induced NMIs perf/x86/intel: Add sanity check for PEBS record/fragment size

Kan Liang (3):
x86/fpu/xstate: Add xsaves_nmi() helper
perf: Move and enhance has_extended_regs() for arch-specific use
perf: Add sampling support for SIMD registers

Rosen Penev (1):
perf/x86/amd/uncore: Turn amd_uncore_ctx events into a flexible array

Sean Christopherson (6):
perf/x86/intel: Invert names of intel_ctrl_{guest,host}_mask perf/x86: KVM: Have perf define a dedicated struct for getting guest PEBS data perf/x86/intel: KVM: Handle cross-mapped PEBS PMCs entirely within KVM
KVM: VMX: Drop a redundant pmu->global_ctrl check when processing pebs_enable
KVM: VMX: Only tell perf to enable PEBS counters for fully enabled PMCs perf/x86/intel: Check only PMC bits in PEBS_ENABLED when detecting host PEBS usage

Thorsten Blum (1):
perf/x86/intel: Annotate x86_pmu::hybrid_pmu with __counted_by_ptr

Usama Arif (2):
perf/x86/amd/uncore: Remove redundant event slot scan perf/x86/amd/uncore: Free counter slot by index

vineash (1):
perf/x86: Don't WARN when the ext_regs_buf allocation fails

 arch/arm/kernel/perf_regs.c           |   8 +-
 arch/arm64/kernel/perf_regs.c         |   8 +-
 arch/csky/kernel/perf_regs.c          |   8 +-
 arch/loongarch/kernel/perf_regs.c     |   8 +-
 arch/mips/kernel/perf_regs.c          |   8 +-
 arch/parisc/kernel/perf_regs.c        |   8 +-
 arch/powerpc/perf/perf_regs.c         |   2 +-
 arch/riscv/kernel/perf_regs.c         |   8 +-
 arch/s390/kernel/perf_regs.c          |   2 +-
 arch/x86/events/amd/uncore.c          |  39 +--
 arch/x86/events/core.c                | 488 ++++++++++++++++++++++++++++++++--
 arch/x86/events/intel/core.c          | 154 +++++++----
 arch/x86/events/intel/ds.c            | 232 ++++++++++++----
 arch/x86/events/intel/lbr.c           |   2 +-
 arch/x86/events/perf_event.h          | 217 ++++++++++++++-
 arch/x86/include/asm/fpu/sched.h      |   5 +-
 arch/x86/include/asm/fpu/xstate.h     |   3 +
 arch/x86/include/asm/kvm_host.h       |   9 -
 arch/x86/include/asm/msr-index.h      |   7 +
 arch/x86/include/asm/perf_event.h     |  46 +++-
 arch/x86/include/uapi/asm/perf_regs.h |  53 ++++
 arch/x86/kernel/fpu/core.c            |  33 ++-
 arch/x86/kernel/fpu/xstate.c          |  25 +-
 arch/x86/kernel/perf_regs.c           | 174 ++++++++++--
 arch/x86/kvm/vmx/pmu_intel.c          |  28 +-
 arch/x86/kvm/vmx/vmx.c                |  10 +-
 arch/x86/kvm/vmx/vmx.h                |  15 +-
 arch/x86/xen/pmu.c                    |   5 +-
 include/linux/perf_event.h            |  23 ++
 include/linux/perf_regs.h             |  36 +--
 include/uapi/linux/perf_event.h       |  49 +++-
 kernel/events/core.c                  | 177 ++++++++++--
 32 files changed, 1579 insertions(+), 311 deletions(-)