KVM: x86/pmu: Correct the mask used in a pmu event filter lookup

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When checking if a pmu event the guest is attempting to program should
be filtered, only consider the event select + unit mask in that
decision. Use an architecture specific mask to mask out all other bits,
including bits 35:32 on Intel.  Those bits are not part of the event
select and should not be considered in that decision.

Fixes: 66bb8a065f ("KVM: x86: PMU Event Filter")
Signed-off-by: Aaron Lewis <aaronlewis@google.com>
Link: https://lore.kernel.org/r/20221220161236.555143-2-aaronlewis@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>

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Aaron Lewis 2022-12-20 16:12:30 +00:00 • committed by Sean Christopherson

parent 7cb79f433e

commit 6a5cba7bed

4 changed files with 6 additions and 1 deletions

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3

arch/x86/kvm/pmu.c

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2

arch/x86/kvm/pmu.h

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1

arch/x86/kvm/svm/pmu.c

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1

arch/x86/kvm/vmx/pmu_intel.c

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