KVM: x86/pmu: Fix a fixed PMC event filter bypass bug

[PATCH 0/2] KVM: x86/pmu: Fix a fixed PMC event filter bypass bug

Sean Christopherson posted 2 patches 4 days, 9 hours ago

Download series mbox

arch/x86/kvm/vmx/pmu_intel.c                           | 10 +++++++++-
.../testing/selftests/kvm/x86/pmu_event_filter_test.c  |  6 ++++++
2 files changed, 15 insertions(+), 1 deletion(-)

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[PATCH 0/2] KVM: x86/pmu: Fix a fixed PMC event filter bypass bug

Posted by Sean Christopherson 4 days, 9 hours ago

Fix a bug reported by Sashiko, where KVM will effectively ignore PMU event
filters for fixed counters if FIXED_CTR_CTRL is changing, but enable bits
for denied counters are NOT changing.

Sean Christopherson (2):
  KVM: x86/pmu: Use hardware value when reprogramming for FIXED_CTR_CTRL
    changes
  KVM: selftests: Add regression test for mediated PMU fixed counter
    filter bug

 arch/x86/kvm/vmx/pmu_intel.c                           | 10 +++++++++-
 .../testing/selftests/kvm/x86/pmu_event_filter_test.c  |  6 ++++++
 2 files changed, 15 insertions(+), 1 deletion(-)


base-commit: d4bfaa66fa171089b9b9fb2dc17af9245f2b9b34
-- 
2.54.0.1032.g2f8565e1d1-goog