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

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Pull performance event updates from Ingo Molnar:
 "x86 PMU driver updates:

   - Add support for the core PMU for Intel Diamond Rapids (DMR) CPUs
     (Dapeng Mi)

     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

   - Likewise, a large series adds uncore PMU support for Intel Diamond
     Rapids (DMR) CPUs (Zide Chen)

     This centers 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.

   - 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:

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

   - 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)"

* tag 'perf-core-2026-02-09' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (58 commits)
  s390: remove kvm_types.h from Kbuild
  uprobes: Fix incorrect lockdep condition in filter_chain()
  x86/ibs: Fix typo in dc_l2tlb_miss comment
  x86/uprobes: Fix XOL allocation failure for 32-bit tasks
  perf/x86/intel/uncore: Convert comma to semicolon
  perf/x86/intel: Add support for rdpmc user disable feature
  perf/x86: Use macros to replace magic numbers in attr_rdpmc
  perf/x86/intel: Add core PMU support for Novalake
  perf/x86/intel: Add support for PEBS memory auxiliary info field in NVL
  perf/x86/intel: Add core PMU support for DMR
  perf/x86/intel: Add support for PEBS memory auxiliary info field in DMR
  perf/x86/intel: Support the 4 new OMR MSRs introduced in DMR and NVL
  perf/core: Fix slow perf_event_task_exit() with LBR callstacks
  perf/core: Speed up kexec shutdown by avoiding unnecessary cross CPU calls
  uprobes: use kmap_local_page() for temporary page mappings
  arm/uprobes: use kmap_local_page() in arch_uprobe_copy_ixol()
  mips/uprobes: use kmap_local_page() in arch_uprobe_copy_ixol()
  arm64/uprobes: use kmap_local_page() in arch_uprobe_copy_ixol()
  riscv/uprobes: use kmap_local_page() in arch_uprobe_copy_ixol()
  perf/x86/intel/uncore: Add Nova Lake support
  ...
This commit is contained in:
Linus Torvalds
2026-02-10 12:00:46 -08:00
parent a9aabb3b83 7db06e329a
commit 4d84667627
45 changed files with 2155 additions and 523 deletions
Download Patch File Download Diff File Expand all files Collapse all files

27
include/uapi/linux/perf_event.h
View File

@@ -1330,14 +1330,16 @@ union perf_mem_data_src {
mem_snoopx : 2, /* Snoop mode, ext */
mem_blk : 3, /* Access blocked */
mem_hops : 3, /* Hop level */
mem_rsvd : 18;
mem_region : 5, /* cache/memory regions */
mem_rsvd : 13;
};
};
#elif defined(__BIG_ENDIAN_BITFIELD)
union perf_mem_data_src {
__u64 val;
struct {
__u64 mem_rsvd : 18,
__u64 mem_rsvd : 13,
mem_region : 5, /* cache/memory regions */
mem_hops : 3, /* Hop level */
mem_blk : 3, /* Access blocked */
mem_snoopx : 2, /* Snoop mode, ext */
@@ -1394,7 +1396,7 @@ union perf_mem_data_src {
#define PERF_MEM_LVLNUM_L4 0x0004 /* L4 */
#define PERF_MEM_LVLNUM_L2_MHB 0x0005 /* L2 Miss Handling Buffer */
#define PERF_MEM_LVLNUM_MSC 0x0006 /* Memory-side Cache */
/* 0x007 available */
#define PERF_MEM_LVLNUM_L0 0x0007 /* L0 */
#define PERF_MEM_LVLNUM_UNC 0x0008 /* Uncached */
#define PERF_MEM_LVLNUM_CXL 0x0009 /* CXL */
#define PERF_MEM_LVLNUM_IO 0x000a /* I/O */
@@ -1447,6 +1449,25 @@ union perf_mem_data_src {
/* 5-7 available */
#define PERF_MEM_HOPS_SHIFT 43
/* Cache/Memory region */
#define PERF_MEM_REGION_NA 0x0 /* Invalid */
#define PERF_MEM_REGION_RSVD 0x01 /* Reserved */
#define PERF_MEM_REGION_L_SHARE 0x02 /* Local CA shared cache */
#define PERF_MEM_REGION_L_NON_SHARE 0x03 /* Local CA non-shared cache */
#define PERF_MEM_REGION_O_IO 0x04 /* Other CA IO agent */
#define PERF_MEM_REGION_O_SHARE 0x05 /* Other CA shared cache */
#define PERF_MEM_REGION_O_NON_SHARE 0x06 /* Other CA non-shared cache */
#define PERF_MEM_REGION_MMIO 0x07 /* MMIO */
#define PERF_MEM_REGION_MEM0 0x08 /* Memory region 0 */
#define PERF_MEM_REGION_MEM1 0x09 /* Memory region 1 */
#define PERF_MEM_REGION_MEM2 0x0a /* Memory region 2 */
#define PERF_MEM_REGION_MEM3 0x0b /* Memory region 3 */
#define PERF_MEM_REGION_MEM4 0x0c /* Memory region 4 */
#define PERF_MEM_REGION_MEM5 0x0d /* Memory region 5 */
#define PERF_MEM_REGION_MEM6 0x0e /* Memory region 6 */
#define PERF_MEM_REGION_MEM7 0x0f /* Memory region 7 */
#define PERF_MEM_REGION_SHIFT 46
#define PERF_MEM_S(a, s) \
(((__u64)PERF_MEM_##a##_##s) << PERF_MEM_##a##_SHIFT)