diff mbox series

[RFC,v2,12/19] vhost-vdpa: introduce uAPI to get the number of address spaces

Message ID 20220224212314.1326-13-gdawar@xilinx.com (mailing list archive)
State New, archived
Headers show
Series [RFC,v2,01/19] vhost: move the backend feature bits to vhost_types.h | expand

Commit Message

Gautam Dawar Feb. 24, 2022, 9:22 p.m. UTC 
This patch introduces the uAPI for getting the number of address
spaces supported by this vDPA device.

Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Gautam Dawar <gdawar@xilinx.com>
---
 drivers/vhost/vdpa.c       | 3 +++
 include/uapi/linux/vhost.h | 2 ++
 2 files changed, 5 insertions(+)
diff mbox series

Patch

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