KVM: vmx/pmu: Add PMU_CAP_LBR_FMT check when guest LBR is enabled
Usespace could set the bits [0, 5] of the IA32_PERF_CAPABILITIES MSR which tells about the record format stored in the LBR records. The LBR will be enabled on the guest if host perf supports LBR (checked via x86_perf_get_lbr()) and the vcpu model is compatible with the host one. Signed-off-by: NLike Xu <like.xu@linux.intel.com> Message-Id: <20210201051039.255478-4-like.xu@linux.intel.com> Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
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