KVM: Add method to check for backwards-compatible API extensions

Signed-off-by: Avi Kivity <avi@qumranet.com>

diff --git a/drivers/kvm/kvm_main.c b/drivers/kvm/kvm_main.c
index 5d24203..39cf8fd 100644 (file)
--- a/drivers/kvm/kvm_main.c
+++ b/drivers/kvm/kvm_main.c
@@ -2416,6 +2416,12 @@ static long kvm_dev_ioctl(struct file *filp,
                r = 0;
                break;
        }
+       case KVM_CHECK_EXTENSION:
+               /*
+                * No extensions defined at present.
+                */
+               r = 0;
+               break;
        default:
                ;
        }

diff --cc include/linux/kvm.h
Simple merge