The size of a virtqueue is a per vq configuration.
This commit introduce a new ioctl uAPI to support this flexibility.
Signed-off-by: Zhu Lingshan <lingshan....@intel.com>
---
include/uapi/linux/vhost.h | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/include/uapi/linux/vhost.h b/include/uapi/linux/vhost.h
index 649560c685f1..bea697390613 100644
--- a/include/uapi/linux/vhost.h
+++ b/include/uapi/linux/vhost.h
@@ -227,4 +227,11 @@
*/
#define VHOST_VDPA_GET_VRING_DESC_GROUP _IOWR(VHOST_VIRTIO, 0x7F,
\
struct vhost_vring_state)
+
+/* Get the queue size of a specific virtqueue.
+ * userspace set the vring index in vhost_vring_state.index
+ * kernel set the queue size in vhost_vring_state.num
+ */
+#define VHOST_VDPA_GET_VRING_SIZE _IOWR(VHOST_VIRTIO, 0x80, \
+ struct vhost_vring_state)
#endif
--
2.39.3
