Messages in this thread | | | Date | Wed, 15 Feb 2023 07:17:13 -0800 | Subject | Re: [PATCH v2 07/21] KVM: x86/pmu: Zero out LBR capabilities during PMU refresh | From | Sean Christopherson <> |
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On Wed, Feb 15, 2023, Like Xu wrote: > On 10/2/2023 8:31 am, Sean Christopherson wrote: > > Note, this is a very theoretical bug, there is no known use case where a > > VMM would deliberately enable the vPMU via KVM_SET_CPUID2, and then later > > disable the vPMU. > > That's why we're getting more and more comfortable with selftests > and fuzz testing on KVM interfaces. So is there a test for this ?
Yep, last patch in the series, "KVM: selftests: Verify LBRs are disabled if vPMU is disabled".
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