[PATCH v14 10/11] KVM: vmx/pmu: Expose LBR_FMT in the MSR_IA32_PERF_CAPABILITIES

Userspace could enable guest LBR feature when the exactly supported LBR format value is initialized to the MSR_IA32_PERF_CAPABILITIES and the LBR is also compatible with vPMU version and host cpu model. The LBR could be enabled on the guest if host perf supports LBR (checked via

[PATCH v14 10/11] KVM: vmx/pmu: Expose LBR_FMT in the MSR_IA32_PERF_CAPABILITIES

Userspace could enable guest LBR feature when the exactly supported LBR format value is initialized to the MSR_IA32_PERF_CAPABILITIES and the LBR is also compatible with vPMU version and host cpu model. The LBR could be enabled on the guest if host perf supports LBR (checked via