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Miscellaneous fixes and CPU model updates:

Browse Source 
- Fix an out-of-bounds access on non-hybrid platforms in the
    Intel PMU DS code, reported by KASAN.
 
  - Add WildcatLake PMU and uncore support: it's identical to the
    PantherLake version.
 
 Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'perf-urgent-2025-11-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull perf event fixes from Ingo Molnar:
 "Miscellaneous fixes and CPU model updates:

   - Fix an out-of-bounds access on non-hybrid platforms in the Intel
     PMU DS code, reported by KASAN

   - Add WildcatLake PMU and uncore support: it's identical to the
     PantherLake version"

* tag 'perf-urgent-2025-11-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf/x86/intel/uncore: Add uncore PMU support for Wildcat Lake
  perf/x86/intel: Add PMU support for WildcatLake
  perf/x86/intel: Fix KASAN global-out-of-bounds warning
This commit is contained in:
Linus Torvalds 2025-11-01 10:17:40 -07:00
commit f9bc8e0912
3 changed files with 4 additions and 1 deletions
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1
arch/x86/events/intel/core.c
View File

@ -7596,6 +7596,7 @@ __init int intel_pmu_init(void)
break;
case INTEL_PANTHERLAKE_L:
case INTEL_WILDCATLAKE_L:
pr_cont("Pantherlake Hybrid events, ");
name = "pantherlake_hybrid";
goto lnl_common;

3
arch/x86/events/intel/ds.c
View File

@ -317,7 +317,8 @@ static u64 __grt_latency_data(struct perf_event *event, u64 status,
{
u64 val;
WARN_ON_ONCE(hybrid_pmu(event->pmu)->pmu_type == hybrid_big);
WARN_ON_ONCE(is_hybrid() &&
hybrid_pmu(event->pmu)->pmu_type == hybrid_big);
dse &= PERF_PEBS_DATA_SOURCE_GRT_MASK;
val = hybrid_var(event->pmu, pebs_data_source)[dse];

1
arch/x86/events/intel/uncore.c
View File

@ -1895,6 +1895,7 @@ static const struct x86_cpu_id intel_uncore_match[] __initconst = {
X86_MATCH_VFM(INTEL_ARROWLAKE_H, &mtl_uncore_init),
X86_MATCH_VFM(INTEL_LUNARLAKE_M, &lnl_uncore_init),
X86_MATCH_VFM(INTEL_PANTHERLAKE_L, &ptl_uncore_init),
X86_MATCH_VFM(INTEL_WILDCATLAKE_L, &ptl_uncore_init),
X86_MATCH_VFM(INTEL_SAPPHIRERAPIDS_X, &spr_uncore_init),
X86_MATCH_VFM(INTEL_EMERALDRAPIDS_X, &spr_uncore_init),
X86_MATCH_VFM(INTEL_GRANITERAPIDS_X, &gnr_uncore_init),