HV_MSR_TIME_REF_COUNT_AVAILABLE
HV_MSR_TIME_REF_COUNT_AVAILABLE;
ent->eax |= HV_MSR_TIME_REF_COUNT_AVAILABLE;
if (ms_hyperv.features & HV_MSR_TIME_REF_COUNT_AVAILABLE)
vcpu_set_cpuid_feature(vcpu, HV_MSR_TIME_REF_COUNT_AVAILABLE);