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-rw-r--r--hw/virtio.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/hw/virtio.h b/hw/virtio.h
index 425727e559..46ed0b28ed 100644
--- a/hw/virtio.h
+++ b/hw/virtio.h
@@ -32,6 +32,8 @@
/* We notify when the ring is completely used, even if the guest is supressing
* callbacks */
#define VIRTIO_F_NOTIFY_ON_EMPTY 24
+/* We support indirect buffer descriptors */
+#define VIRTIO_RING_F_INDIRECT_DESC 28
/* A guest should never accept this. It implies negotiation is broken. */
#define VIRTIO_F_BAD_FEATURE 30
@@ -41,6 +43,8 @@
#define VRING_DESC_F_NEXT 1
/* This marks a buffer as write-only (otherwise read-only). */
#define VRING_DESC_F_WRITE 2
+/* This means the buffer contains a list of buffer descriptors. */
+#define VRING_DESC_F_INDIRECT 4
/* This means don't notify other side when buffer added. */
#define VRING_USED_F_NO_NOTIFY 1