Synthetic timers MSRs (HV_X64_MSR_STIMER[0-3]_CONFIG, HV_X64_MSR_STIMER[0-3]_COUNT) are only available to guest when HV_MSR_SYNTIMER_AVAILABLE bit is exposed. Signed-off-by: Vitaly Kuznetsov <vkuznets@xxxxxxxxxx> --- arch/x86/kvm/hyperv.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/arch/x86/kvm/hyperv.c b/arch/x86/kvm/hyperv.c index 17bdf8e8196e..2582c23126fa 100644 --- a/arch/x86/kvm/hyperv.c +++ b/arch/x86/kvm/hyperv.c @@ -1227,6 +1227,16 @@ static bool hv_check_msr_access(struct kvm_vcpu_hv *hv_vcpu, u32 msr) case HV_X64_MSR_SINT0 ... HV_X64_MSR_SINT15: return hv_vcpu->cpuid_cache.features_eax & HV_MSR_SYNIC_AVAILABLE; + case HV_X64_MSR_STIMER0_CONFIG: + case HV_X64_MSR_STIMER1_CONFIG: + case HV_X64_MSR_STIMER2_CONFIG: + case HV_X64_MSR_STIMER3_CONFIG: + case HV_X64_MSR_STIMER0_COUNT: + case HV_X64_MSR_STIMER1_COUNT: + case HV_X64_MSR_STIMER2_COUNT: + case HV_X64_MSR_STIMER3_COUNT: + return hv_vcpu->cpuid_cache.features_eax & + HV_MSR_SYNTIMER_AVAILABLE; default: break; } -- 2.30.2
