| Message ID | 20180316170020.8212-3-vkuznets@redhat.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
diff --git a/target/i386/kvm.c b/target/i386/kvm.c index accf50eac3..a6d1210f46 100644 --- a/target/i386/kvm.c +++ b/target/i386/kvm.c @@ -650,7 +650,7 @@ static int hyperv_handle_properties(CPUState *cs) env->features[FEAT_HYPERV_EAX] |= HV_TIME_REF_COUNT_AVAILABLE; env->features[FEAT_HYPERV_EAX] |= HV_REFERENCE_TSC_AVAILABLE; - if (has_msr_hv_frequencies && tsc_is_stable_and_known(env)) { + if (has_msr_hv_frequencies && env->tsc_khz) { env->features[FEAT_HYPERV_EAX] |= HV_ACCESS_FREQUENCY_MSRS; env->features[FEAT_HYPERV_EDX] |= HV_FREQUENCY_MSRS_AVAILABLE; }
Requiring tsc_is_stable_and_known() is too restrictive: even without INVTCS nested Hyper-V-on-KVM enables TSC pages for its guests e.g. when Reenlightenment MSRs are present. Presence of frequency MSRs doesn't mean these frequencies are stable, it just means they're available for reading. Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> --- target/i386/kvm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)