This patch introduces the uAPI for getting the number of address
spaces supported by this vDPA device.
Signed-off-by: Jason Wang <[email protected]>
Signed-off-by: Gautam Dawar <[email protected]>
---
drivers/vhost/vdpa.c | 3 +++
include/uapi/linux/vhost.h | 2 ++
2 files changed, 5 insertions(+)
diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c
index 7a8a99cef8a4..733b305c5029 100644
--- a/drivers/vhost/vdpa.c
+++ b/drivers/vhost/vdpa.c
@@ -542,6 +542,9 @@ static long vhost_vdpa_unlocked_ioctl(struct file *filep,
r = copy_to_user(argp, &v->vdpa->ngroups,
sizeof(v->vdpa->ngroups));
break;
+ case VHOST_VDPA_GET_AS_NUM:
+ r = copy_to_user(argp, &v->vdpa->nas, sizeof(v->vdpa->nas));
+ 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 8a4e6e426bbf..8762911a3cb8 100644
--- a/include/uapi/linux/vhost.h
+++ b/include/uapi/linux/vhost.h
@@ -148,4 +148,6 @@
/* Get the number of virtqueue groups. */
#define VHOST_VDPA_GET_GROUP_NUM _IOR(VHOST_VIRTIO, 0x79, unsigned int)
+/* Get the number of address spaces. */
+#define VHOST_VDPA_GET_AS_NUM _IOR(VHOST_VIRTIO, 0x7A, unsigned int)
#endif
--
2.25.0