Vitaly Kuznetsov <vkuznets@xxxxxxxxxx> writes: > We shouldn't probably be suggesting using Enlightened VMCS when it's not > enabled (not supported from guest's point of view). Hyper-V on KVM seems > to be fine either way but let's be consistent. > Fixes: 2bc39970e932 ("x86/kvm/hyper-v: Introduce KVM_GET_SUPPORTED_HV_CPUID") is missing here. Hope it can be added upon commit. > Reviewed-by: Liran Alon <liran.alon@xxxxxxxxxx> > Signed-off-by: Vitaly Kuznetsov <vkuznets@xxxxxxxxxx> > --- > arch/x86/kvm/hyperv.c | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) > > diff --git a/arch/x86/kvm/hyperv.c b/arch/x86/kvm/hyperv.c > index 4840f5b3c88f..4730fcaa70cf 100644 > --- a/arch/x86/kvm/hyperv.c > +++ b/arch/x86/kvm/hyperv.c > @@ -1850,7 +1850,8 @@ int kvm_vcpu_ioctl_get_hv_cpuid(struct kvm_vcpu *vcpu, struct kvm_cpuid2 *cpuid, > ent->eax |= HV_X64_RELAXED_TIMING_RECOMMENDED; > ent->eax |= HV_X64_CLUSTER_IPI_RECOMMENDED; > ent->eax |= HV_X64_EX_PROCESSOR_MASKS_RECOMMENDED; > - ent->eax |= HV_X64_ENLIGHTENED_VMCS_RECOMMENDED; > + if (evmcs_ver) > + ent->eax |= HV_X64_ENLIGHTENED_VMCS_RECOMMENDED; > > /* > * Default number of spinlock retry attempts, matches -- Vitaly