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".
