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[v2,19/31] KVM: x86: Expose Hyper-V Direct TLB flush feature

Message ID 20220407155645.940890-20-vkuznets@redhat.com (mailing list archive)
State New, archived
Headers show
Series KVM: x86: hyper-v: Fine-grained TLB flush + Direct TLB flush feature | expand

Commit Message

Vitaly Kuznetsov April 7, 2022, 3:56 p.m. UTC 
With both nSVM and nVMX implementations in place, KVM can export
Hyper-V Direct 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 mbox series

Patch

diff --git a/arch/x86/kvm/hyperv.c b/arch/x86/kvm/hyperv.c
index f08cf295d750..7758ed3dc811 100644
--- a/arch/x86/kvm/hyperv.c
+++ b/arch/x86/kvm/hyperv.c
@@ -2801,6 +2801,7 @@  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;