Re: [PATCH v3 00/17] KVM: x86/pmu: Add support to enable Guest PEBS via DS
On Fri, Jan 15, 2021, Andi Kleen wrote: > > I'm asking about ucode/hardare. Is the "guest pebs buffer write -> PEBS PMI" > > guaranteed to be atomic? > > Of course not.
So there's still a window where the guest could observe the bad counter index, correct?