Re: [PATCH v3 22/34] KVM: x86: Expose Hyper-V L2 TLB flush feature

Maxim Levitsky
2022-05-11T11:34:27Z

On Thu, 2022-04-14 at 15:20 +0200, Vitaly Kuznetsov wrote:
> With both nSVM and nVMX implementations in place, KVM can now expose
> Hyper-V L2 TLB flush feature to userspace.
>
> Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
> ---
> arch/x86/kvm/hyperv.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/arch/x86/kvm/hyperv.c b/arch/x86/kvm/hyperv.c
> index 68a0df4e3f66..1d6927538bc7 100644
> --- a/arch/x86/kvm/hyperv.c
> +++ b/arch/x86/kvm/hyperv.c
> @@ -2826,6 +2826,7 @@ int kvm_get_hv_cpuid(struct kvm_vcpu *vcpu, struct kvm_cpuid2 *cpuid,
>
> case HYPERV_CPUID_NESTED_FEATURES:
> ent->eax = evmcs_ver;
> + ent->eax |= HV_X64_NESTED_DIRECT_FLUSH;
> ent->eax |= HV_X64_NESTED_MSR_BITMAP;
>
> break;

Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>

Best regards,
Maxim Levitsky