Commit 3ace88bd authored by Gautam Dawar's avatar Gautam Dawar Committed by Michael S. Tsirkin
Browse files

vhost-vdpa: introduce uAPI to get the number of virtqueue groups 



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: default avatarJason Wang <jasowang@redhat.com>
Signed-off-by: default avatarGautam Dawar <gdawar@xilinx.com>
Message-Id: <20220330180436.24644-12-gdawar@xilinx.com>
Signed-off-by: default avatarMichael S. Tsirkin <mst@redhat.com>
parent 3d569879

drivers/vhost/vdpa.c

+4 −0
Original line number Diff line number Diff line
@@ -559,6 +559,10 @@ 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;

include/uapi/linux/vhost.h

+3 −1
Original line number Diff line number Diff line
@@ -145,11 +145,13 @@ 
/* Get the valid iova range */

#define VHOST_VDPA_GET_IOVA_RANGE	_IOR(VHOST_VIRTIO, 0x78, \

					     struct vhost_vdpa_iova_range)



/* Get the config size */

#define VHOST_VDPA_GET_CONFIG_SIZE	_IOR(VHOST_VIRTIO, 0x79, __u32)



/* Get the count of all virtqueues */

#define VHOST_VDPA_GET_VQS_COUNT	_IOR(VHOST_VIRTIO, 0x80, __u32)



/* Get the number of virtqueue groups. */

#define VHOST_VDPA_GET_GROUP_NUM	_IOR(VHOST_VIRTIO, 0x81, __u32)



#endif