Re: [PATCH v2 1/7] perf/x86/core: Update x86_pmu.pebs_capable for ICELAKE_{X,D}

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On 7/21/22 12:35, Like Xu wrote:
From: Like Xu <likexu@xxxxxxxxxxx>

Ice Lake microarchitecture with EPT-Friendly PEBS capability also support
the Extended feature, which means that all counters (both fixed function
and general purpose counters) can be used for PEBS events.

Update x86_pmu.pebs_capable like SPR to apply PEBS_ALL semantics.

Cc: Kan Liang <kan.liang@xxxxxxxxxxxxxxx>
Fixes: fb358e0b811e ("perf/x86/intel: Add EPT-Friendly PEBS for Ice Lake Server")
Signed-off-by: Like Xu <likexu@xxxxxxxxxxx>
---
  arch/x86/events/intel/core.c | 1 +
  1 file changed, 1 insertion(+)

diff --git a/arch/x86/events/intel/core.c b/arch/x86/events/intel/core.c
index 4e9b7af9cc45..e46fd496187b 100644
--- a/arch/x86/events/intel/core.c
+++ b/arch/x86/events/intel/core.c
@@ -6239,6 +6239,7 @@ __init int intel_pmu_init(void)
  	case INTEL_FAM6_ICELAKE_X:
  	case INTEL_FAM6_ICELAKE_D:
  		x86_pmu.pebs_ept = 1;
+		x86_pmu.pebs_capable = ~0ULL;
  		pmem = true;
  		fallthrough;
  	case INTEL_FAM6_ICELAKE_L:

Peter, can you please ack this (you were not CCed on this KVM series but this patch is really perf core)?

Thanks,

Paolo




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