linux-kernel - Re: [PATCH v4 0/5] KVM: selftests: PMU fixes for GNR/SRF/CWF

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Message-ID: <dcb17b1b-a1a3-427c-8b5d-c2e791a3a46f@linux.intel.com>
Date: Sat, 20 Sep 2025 08:50:00 +0800
From: "Mi, Dapeng" <dapeng1.mi@...ux.intel.com>
To: Sean Christopherson <seanjc@...gle.com>,
 Paolo Bonzini <pbonzini@...hat.com>
Cc: kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
 Yi Lai <yi1.lai@...el.com>
Subject: Re: [PATCH v4 0/5] KVM: selftests: PMU fixes for GNR/SRF/CWF


On 9/20/2025 5:46 AM, Sean Christopherson wrote:
> Fix KVM PMU selftests errors encountered on Granite Rapids (GNR),
> Sierra Forest (SRF) and Clearwater Forest (CWF).
>
> The cover letter from v2 has gory details, as do the patches.
>
> v4:
>  - Fix an unavailable_mask goof. [Dapeng]
>  - Fix a bitmask goof (missing BIT_ULL()). [Dapeng]
>
> v3: 
>  - https://lore.kernel.org/all/20250919004512.1359828-1-seanjc@google.com/
>  - Make PMU errata available to all tests by default.
>  - Redo testing of "unavailable PMU events" to drastically reduce the number
>    of testcases.
>
> v2:
>  - https://lore.kernel.org/all/20250718001905.196989-1-dapeng1.mi@linux.intel.com 
>  - Add error fix for vmx_pmu_caps_test on GNR/SRF (patch 2/5).
>  - Opportunistically fix a typo (patch 1/5).
>
> v1: https://lore.kernel.org/all/20250712172522.187414-1-dapeng1.mi@linux.intel.com
>
> Dapeng Mi (2):
>   KVM: selftests: Add timing_info bit support in vmx_pmu_caps_test
>   KVM: selftests: Validate more arch-events in pmu_counters_test
>
> Sean Christopherson (2):
>   KVM: selftests: Track unavailable_mask for PMU events as 32-bit value
>   KVM: selftests: Reduce number of "unavailable PMU events" combos
>     tested
>
> dongsheng (1):
>   KVM: selftests: Handle Intel Atom errata that leads to PMU event
>     overcount
>
>  tools/testing/selftests/kvm/include/x86/pmu.h | 26 ++++++++
>  .../selftests/kvm/include/x86/processor.h     |  7 ++-
>  tools/testing/selftests/kvm/lib/x86/pmu.c     | 49 +++++++++++++++
>  .../testing/selftests/kvm/lib/x86/processor.c |  4 ++
>  .../selftests/kvm/x86/pmu_counters_test.c     | 63 +++++++++++++------
>  .../selftests/kvm/x86/pmu_event_filter_test.c |  4 +-
>  .../selftests/kvm/x86/vmx_pmu_caps_test.c     |  3 +-
>  7 files changed, 135 insertions(+), 21 deletions(-)
>
>
> base-commit: c8fbf7ceb2ae3f64b0c377c8c21f6df577a13eb4

Test pmu_counters_test/pmu_event_filter_test/vmx_pmu_caps_test on
SPR/GNR/SRF/CWF platforms, no issue is found. Thanks.

Tested-by: Dapeng Mi <dapeng1.mi@...ux.intel.com>