vhost-vdpa: uAPI to get dedicated descriptor group id

[linux-2.6-microblaze.git] / include / uapi / linux / vhost.h

diff --git a/include/uapi/linux/vhost.h b/include/uapi/linux/vhost.h
index f5c48b6..649560c 100644 (file)
--- a/include/uapi/linux/vhost.h
+++ b/include/uapi/linux/vhost.h
@@ -219,4 +219,12 @@
  */
 #define VHOST_VDPA_RESUME              _IO(VHOST_VIRTIO, 0x7E)
 
+/* Get the group for the descriptor table including driver & device areas
+ * of a virtqueue: read index, write group in num.
+ * The virtqueue index is stored in the index field of vhost_vring_state.
+ * The group ID of the descriptor table for this specific virtqueue
+ * is returned via num field of vhost_vring_state.
+ */
+#define VHOST_VDPA_GET_VRING_DESC_GROUP        _IOWR(VHOST_VIRTIO, 0x7F,       \
+                                             struct vhost_vring_state)
 #endif