Performance events changes for v7.0

Linus,

Please pull the latest perf/core Git tree from:

git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git perf-core-2026-02-09

for you to fetch changes up to 7db06e329af30dcb170a6782c1714217ad65033d:

Performance events changes for v7.0:

x86 PMU driver updates:

- Add support for the core PMU for Intel Diamond Rapids (DMR) CPUs. Compared to previous iterations of the Intel PMU code, there's been a lot of changes, which center around three main areas:

- Introduce the OFF-MODULE RESPONSE (OMR) facility to replace the Off-Core Response (OCR) facility

- New PEBS data source encoding layout

- Support the new "RDPMC user disable" feature

(Dapeng Mi)

- Likewise, a large series adds uncore PMU support for Intel Diamond Rapids (DMR) CPUs, which center around these four main areas:

- DMR may have two Integrated I/O and Memory Hub (IMH) dies, separate from the compute tile (CBB) dies. Each CBB and each IMH die has its own discovery domain.

- Unlike prior CPUs that retrieve the global discovery table portal exclusively via PCI or MSR, DMR uses PCI for IMH PMON discovery and MSR for CBB PMON discovery.

- DMR introduces several new PMON types: SCA, HAMVF, D2D_ULA, UBR, PCIE4, CRS, CPC, ITC, OTC, CMS, and PCIE6.

- IIO free-running counters in DMR are MMIO-based, unlike SPR.

(Zide Chen)

- Also add support for Add missing PMON units for Intel Panther Lake, and support Nova Lake (NVL), which largely maps to Panther Lake. (Zide Chen)

- KVM integration: Add support for mediated vPMUs (by Kan Liang and Sean Christopherson, with fixes and cleanups by Peter Zijlstra, Sandipan Das and Mingwei Zhang)

- Add Intel cstate driver to support for Wildcat Lake (WCL) CPUs, which are a low-power variant of Panther Lake. (Zide Chen)

- Add core, cstate and MSR PMU support for the Airmont NP Intel CPU (aka MaxLinear Lightning Mountain), which maps to the existing Airmont code. (Martin Schiller)

Performance enhancements:

- core: Speed up kexec shutdown by avoiding unnecessary cross CPU calls. (Jan H. Schönherr)

- core: Fix slow perf_event_task_exit() with LBR callstacks (Namhyung Kim)

User-space stack unwinding support:

- Various cleanups and refactorings in preparation to generalize the unwinding code for other architectures. (Jens Remus)

Uprobes updates:

- Transition from kmap_atomic to kmap_local_page (Keke Ming)

- Fix incorrect lockdep condition in filter_chain() (Breno Leitao)

- Fix XOL allocation failure for 32-bit tasks (Oleg Nesterov)

Misc fixes and cleanups:

- s390: Remove kvm_types.h from Kbuild (Randy Dunlap)

- x86/intel/uncore: Convert comma to semicolon (Chen Ni)

- x86/uncore: Clean up const mismatch (Greg Kroah-Hartman)

- x86/ibs: Fix typo in dc_l2tlb_miss comment (Xiang-Bin Shi)

Thanks,

Ingo

------------------>
Breno Leitao (1):
uprobes: Fix incorrect lockdep condition in filter_chain()

Chen Ni (1):
perf/x86/intel/uncore: Convert comma to semicolon

Dapeng Mi (7):
perf/x86/intel: Support the 4 new OMR MSRs introduced in DMR and NVL perf/x86/intel: Add support for PEBS memory auxiliary info field in DMR perf/x86/intel: Add core PMU support for DMR perf/x86/intel: Add support for PEBS memory auxiliary info field in NVL perf/x86/intel: Add core PMU support for Novalake
perf/x86: Use macros to replace magic numbers in attr_rdpmc perf/x86/intel: Add support for rdpmc user disable feature

Greg Kroah-Hartman (1):
perf/x86/uncore: clean up const mismatch

Jan H. Schönherr (1):
perf/core: Speed up kexec shutdown by avoiding unnecessary cross CPU calls

Jens Remus (4):
unwind_user: Enhance comments on get CFA, FP, and RA unwind_user/fp: Use dummies instead of ifdef x86/unwind_user: Guard unwind_user_word_size() by UNWIND_USER x86/unwind_user: Simplify unwind_user_word_size()

Kan Liang (7):
perf: Skip pmu_ctx based on event_type
perf: Add generic exclude_guest support
perf: Add APIs to create/release mediated guest vPMUs
perf: Clean up perf ctx time
perf: Add a EVENT_GUEST flag
perf: Add APIs to load/put guest mediated PMU context perf/x86/intel: Support PERF_PMU_CAP_MEDIATED_VPMU

Keke Ming (5):
riscv/uprobes: use kmap_local_page() in arch_uprobe_copy_ixol() arm64/uprobes: use kmap_local_page() in arch_uprobe_copy_ixol() mips/uprobes: use kmap_local_page() in arch_uprobe_copy_ixol() arm/uprobes: use kmap_local_page() in arch_uprobe_copy_ixol()
uprobes: use kmap_local_page() for temporary page mappings

Martin Schiller (3):
perf/x86/msr: Add Airmont NP
perf/x86/intel: Add Airmont NP
perf/x86/cstate: Add Airmont NP

Mingwei Zhang (1):
perf/x86/core: Plumb mediated PMU capability from x86_pmu to x86_pmu_cap

Namhyung Kim (1):
perf/core: Fix slow perf_event_task_exit() with LBR callstacks

Oleg Nesterov (1):
x86/uprobes: Fix XOL allocation failure for 32-bit tasks

Peter Zijlstra (2):
perf: Clean up mediated vPMU accounting
perf: Use EXPORT_SYMBOL_FOR_KVM() for the mediated APIs

Randy Dunlap (1):
s390: remove kvm_types.h from Kbuild

Sandipan Das (2):
perf/x86/core: Do not set bit width for unavailable counters perf/x86/amd: Support PERF_PMU_CAP_MEDIATED_VPMU for AMD host

Sean Christopherson (3):
perf: Move security_perf_event_free() call to __free_event() perf/x86/core: Register a new vector for handling mediated guest PMIs perf/x86/core: Add APIs to switch to/from mediated PMI vector (for KVM)

Xiang-Bin Shi (1):
x86/ibs: Fix typo in dc_l2tlb_miss comment

Zide Chen (16):
perf/x86/intel/cstate: Add Wildcat Lake support perf/x86/intel/cstate: Add Nova Lake support perf/x86/intel/cstate: Add Diamond Rapids support perf/x86/intel/uncore: Move uncore discovery init struct to header perf/x86/intel/uncore: Support per-platform discovery base devices perf/x86/intel/uncore: Remove has_generic_discovery_table() perf/x86/intel/uncore: Add IMH PMON support for Diamond Rapids perf/x86/intel/uncore: Add CBB PMON support for Diamond Rapids perf/x86/intel/uncore: Add domain global init callback perf/x86/intel/uncore: Add freerunning event descriptor helper macro perf/x86/intel/uncore: Support IIO free-running counters on DMR perf/x86/intel/uncore: Support uncore constraint ranges perf/x86/intel/uncore: Update DMR uncore constraints preliminarily perf pmu: Relax uncore wildcard matching to allow numeric suffix perf/x86/intel/uncore: Add missing PMON units for Panther Lake perf/x86/intel/uncore: Add Nova Lake support

 .../testing/sysfs-bus-event_source-devices-rdpmc   |  44 ++
 arch/arm/probes/uprobes/core.c                     |   4 +-
 arch/arm64/kernel/probes/uprobes.c                 |   4 +-
 arch/mips/kernel/uprobes.c                         |   4 +-
 arch/riscv/kernel/probes/uprobes.c                 |   4 +-
 arch/s390/include/asm/Kbuild                       |   1 -
 arch/x86/entry/entry_fred.c                        |   1 +
 arch/x86/events/amd/core.c                         |   2 +
 arch/x86/events/core.c                             |  66 +-
 arch/x86/events/intel/core.c                       | 370 ++++++++++-
 arch/x86/events/intel/cstate.c                     |  33 +-
 arch/x86/events/intel/ds.c                         | 261 ++++++++
 arch/x86/events/intel/p6.c                         |   2 +-
 arch/x86/events/intel/uncore.c                     | 139 +++--
 arch/x86/events/intel/uncore.h                     |  26 +
 arch/x86/events/intel/uncore_discovery.c           |  84 ++-
 arch/x86/events/intel/uncore_discovery.h           |   8 +-
 arch/x86/events/intel/uncore_snb.c                 |  85 +++
 arch/x86/events/intel/uncore_snbep.c               | 690 ++++++++++++++-------
 arch/x86/events/msr.c                              |   1 +
 arch/x86/events/perf_event.h                       |  26 +
 arch/x86/include/asm/amd/ibs.h                     |   2 +-
 arch/x86/include/asm/hardirq.h                     |   3 +
 arch/x86/include/asm/idtentry.h                    |   6 +
 arch/x86/include/asm/irq_vectors.h                 |   4 +-
 arch/x86/include/asm/msr-index.h                   |   5 +
 arch/x86/include/asm/perf_event.h                  |  14 +-
 arch/x86/include/asm/unwind_user.h                 |  27 +-
 arch/x86/kernel/idt.c                              |   3 +
 arch/x86/kernel/irq.c                              |  19 +
 arch/x86/kernel/uprobes.c                          |  24 +
 arch/x86/kvm/Kconfig                               |   1 +
 include/asm-generic/Kbuild                         |   1 +
 include/linux/perf_event.h                         |  35 +-
 include/linux/unwind_user.h                        |  18 +-
 include/linux/uprobes.h                            |   1 +
 include/uapi/linux/perf_event.h                    |  27 +-
 init/Kconfig                                       |   4 +
 kernel/events/core.c                               | 544 ++++++++++++----
 kernel/events/uprobes.c                            |  24 +-
 kernel/unwind/user.c                               |  12 +-
 tools/include/uapi/linux/perf_event.h              |  27 +-
 .../beauty/arch/x86/include/asm/irq_vectors.h      |   3 +-
 tools/perf/util/pmu.c                              |  14 +-
 virt/kvm/kvm_main.c                                |   3 +
 45 files changed, 2154 insertions(+), 522 deletions(-)
 create mode 100644 Documentation/ABI/testing/sysfs-bus-event_source-devices-rdpmc