virtio: VIRTIO_F_ANY_LAYOUT feature

Also known as the "no really, I read the spec" bit.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

diff --git a/include/uapi/linux/virtio_config.h b/include/uapi/linux/virtio_config.h
index b7cda390fd00527eac3a2bdfaf93e56581bea344..3ce768c6910d1664376f21fba0608a20ff7523c9 100644 (file)
--- a/include/uapi/linux/virtio_config.h
+++ b/include/uapi/linux/virtio_config.h
@@ -51,4 +51,7 @@
  * suppressed them? */
 #define VIRTIO_F_NOTIFY_ON_EMPTY       24
 
+/* Can the device handle any descriptor layout? */
+#define VIRTIO_F_ANY_LAYOUT            27
+
 #endif /* _UAPI_LINUX_VIRTIO_CONFIG_H */