diff options
| author | Vitaly Kuznetsov <vkuznets@redhat.com> | 2019-01-25 12:19:34 +0100 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2019-01-25 19:11:25 +0100 |
| commit | f1adceaf01f0446e69c15b32f24ce98e3c3623f1 (patch) | |
| tree | 36bb3a0161b43dd803c9363df0f3beb9b30100d6 | |
| parent | 1998fd32aa62fbf22cd1d8258e6a9deffd6bc466 (diff) | |
| download | linux-f1adceaf01f0446e69c15b32f24ce98e3c3623f1.tar.bz2 | |
x86/kvm/hyper-v: recommend using eVMCS only when it is enabled
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")
Reviewed-by: Liran Alon <liran.alon@oracle.com>
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
| -rw-r--r-- | arch/x86/kvm/hyperv.c | 3 |
1 files changed, 2 insertions, 1 deletions
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 |