Follows the vDPA support for multiple address spaces, this patch
introduce uAPI for the userspace to know the number of virtqueue
groups supported by the vDPA device.
Signed-off-by: Jason Wang <[email protected]>
Signed-off-by: Gautam Dawar <[email protected]>
---
drivers/vhost/vdpa.c | 4 ++++
include/uapi/linux/vhost.h | 3 +++
2 files changed, 7 insertions(+)
diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c
index 4e8b7c4809cd..7a8a99cef8a4 100644
--- a/drivers/vhost/vdpa.c
+++ b/drivers/vhost/vdpa.c
@@ -538,6 +538,10 @@ static long vhost_vdpa_unlocked_ioctl(struct file *filep,
case VHOST_VDPA_GET_VRING_NUM:
r = vhost_vdpa_get_vring_num(v, argp);
break;
+ case VHOST_VDPA_GET_GROUP_NUM:
+ r = copy_to_user(argp, &v->vdpa->ngroups,
+ sizeof(v->vdpa->ngroups));
+ break;
case VHOST_SET_LOG_BASE:
case VHOST_SET_LOG_FD:
r = -ENOIOCTLCMD;
diff --git a/include/uapi/linux/vhost.h b/include/uapi/linux/vhost.h
index 59c6c0fbaba1..8a4e6e426bbf 100644
--- a/include/uapi/linux/vhost.h
+++ b/include/uapi/linux/vhost.h
@@ -145,4 +145,7 @@
/* Get the valid iova range */
#define VHOST_VDPA_GET_IOVA_RANGE _IOR(VHOST_VIRTIO, 0x78, \
struct vhost_vdpa_iova_range)
+/* Get the number of virtqueue groups. */
+#define VHOST_VDPA_GET_GROUP_NUM _IOR(VHOST_VIRTIO, 0x79, unsigned int)
+
#endif
--
2.25.0