On 12/03/2018 16:12, Vitaly Kuznetsov wrote: > > - if (has_msr_hv_frequencies && tsc_is_stable_and_known(env)) { > + if (has_msr_hv_frequencies && env->tsc_khz) {
Should this be ((env->tsc_khz && has_msr_hv_reenlightenment) || tsc_is_stable_and_known(env)) so that you don't regress on older kernels? Paolo > env->features[FEAT_HYPERV_EAX] |= HV_ACCESS_FREQUENCY_MSRS; > env->features[FEAT_HYPERV_EDX] |= HV_FREQUENCY_MSRS_AVAILABLE; > }