On Sun, Jan 23, 2022 at 10:45 AM David Dunn <daviddunn@xxxxxxxxxx> wrote: > > KVM_CAP_PMU_DISABLE is used to disable PMU virtualization on individual > x86 VMs. PMU configuration must be done prior to creating VCPUs. > > To enable future extension, KVM_CAP_PMU_CAPABILITY reports available > settings via bitmask when queried via check_extension. > > For VMs that have PMU virtualization disabled, usermode will need to > clear CPUID leaf 0xA to notify guests. > > Signed-off-by: David Dunn <daviddunn@xxxxxxxxxx> Nit: The two references to CPUID leaf 0xA should be qualified as applying only to Intel VMs. Reviewed-by: Jim Mattson <jmattson@xxxxxxxxxx>
