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.zhu@xxxxxxxxx> --- 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
