Re: [PATCH 5/5] KVM: x86/pmu: Hide guest counter updates from the VMRUN instruction

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On 25/5/2023 5:30 am, Jim Mattson wrote:
Note that there's a bug in the original code for this that has
probably never been fixed: it ignores CMASK and INV in the PerfEvtSel.

Regarding the emulation of CMASK, INV and PIN_CONTROL bits on vPMU,
please forgive me for never having the right expectations (so there will be no
correct emulation), an share more *architecture* descriptions of those hw
behavior, and it would be great to have corresponding selftests as a bug report.



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