diff options
Diffstat (limited to 'include/virtio_ring.h')
| -rw-r--r-- | include/virtio_ring.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/include/virtio_ring.h b/include/virtio_ring.h index 6fc0593b14..c77c212cff 100644 --- a/include/virtio_ring.h +++ b/include/virtio_ring.h @@ -55,6 +55,16 @@ struct vring_desc { __virtio16 next; }; +/* Shadow of struct vring_desc in guest byte order. */ +struct vring_desc_shadow { + u64 addr; + u32 len; + u16 flags; + u16 next; + /* Metadata about the descriptor. */ + bool chain_head; +}; + struct vring_avail { __virtio16 flags; __virtio16 idx; @@ -89,6 +99,7 @@ struct vring { * @index: the zero-based ordinal number for this queue * @num_free: number of elements we expect to be able to fit * @vring: actual memory layout for this queue + * @vring_desc_shadow: guest-only copy of descriptors * @event: host publishes avail event idx * @free_head: head of free buffer list * @num_added: number we've added since last sync @@ -102,6 +113,7 @@ struct virtqueue { unsigned int index; unsigned int num_free; struct vring vring; + struct vring_desc_shadow *vring_desc_shadow; bool event; unsigned int free_head; unsigned int num_added; |