KVM: selftests: Don't probe KVM_CAP_HYPERV_ENLIGHTENED_VMCS when nested VMX is unsupported

KVM_CAP_HYPERV_ENLIGHTENED_VMCS will be reported as supported even when
nested VMX is not, fix evmcs_test/hyperv_cpuid tests to check for both.
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Message-Id: <20200610135847.754289-3-vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

tools/testing/selftests/kvm/x86_64/evmcs_test.c

@@ -94,9 +94,10 @@ int main(int argc, char *argv[])
 
 	vcpu_set_cpuid(vm, VCPU_ID, kvm_get_supported_cpuid());
 
-	if (!kvm_check_cap(KVM_CAP_NESTED_STATE) ||
+	if (!nested_vmx_supported() ||
+	    !kvm_check_cap(KVM_CAP_NESTED_STATE) ||
 	    !kvm_check_cap(KVM_CAP_HYPERV_ENLIGHTENED_VMCS)) {
-		print_skip("capabilities not available");
+		print_skip("Enlightened VMCS is unsupported");
 		exit(KSFT_SKIP);
 	}
 

tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c

@@ -170,7 +170,8 @@ int main(int argc, char *argv[])
 		case 1:
 			break;
 		case 2:
-			if (!kvm_check_cap(KVM_CAP_HYPERV_ENLIGHTENED_VMCS)) {
+			if (!nested_vmx_supported() ||
+			    !kvm_check_cap(KVM_CAP_HYPERV_ENLIGHTENED_VMCS)) {
 				print_skip("Enlightened VMCS is unsupported");
 				continue;
 			}