On Mon, Sep 19, 2022 at 2:35 AM Like Xu <like.xu.linux@xxxxxxxxx> wrote: > > From: Sandipan Das <sandipan.das@xxxxxxx> > > From: Sandipan Das <sandipan.das@xxxxxxx> > > CPUID leaf 0x80000022 i.e. ExtPerfMonAndDbg advertises some > new performance monitoring features for AMD processors. > > Bit 0 of EAX indicates support for Performance Monitoring > Version 2 (PerfMonV2) features. If found to be set during > PMU initialization, the EBX bits of the same CPUID function > can be used to determine the number of available PMCs for > different PMU types. > > Expose the relevant bits via KVM_GET_SUPPORTED_CPUID so > that guests can make use of the PerfMonV2 features. > > Co-developed-by: Like Xu <likexu@xxxxxxxxxxx> > Signed-off-by: Like Xu <likexu@xxxxxxxxxxx> > Signed-off-by: Sandipan Das <sandipan.das@xxxxxxx> Reviewed-by: Jim Mattson <jmattson@xxxxxxxxxx>
