[RFC PATCH 16/18] KVM: Advertise KVM_CAP_USERFAULT in KVM_CHECK_EXTENSION

[James Houghton]

Advertise support for KVM_CAP_USERFAULT when CONFIG_KVM_USERFAULT is
enabled.

Signed-off-by: James Houghton <jthoughton at google.com>
---
 virt/kvm/kvm_main.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index d2ca16ddcaa1..90ce6b8ff0ab 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -4916,6 +4916,10 @@ static int kvm_vm_ioctl_check_extension_generic(struct kvm *kvm, long arg)
 #ifdef CONFIG_KVM_PRIVATE_MEM
 	case KVM_CAP_GUEST_MEMFD:
 		return !kvm || kvm_arch_has_private_mem(kvm);
+#endif
+#ifdef CONFIG_KVM_USERFAULT
+	case KVM_CAP_USERFAULT:
+		return 1;
 #endif
 	default:
 		break;
-- 
2.45.2.993.g49e7a77208-goog