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vhost-vdpa: uAPI to get virtqueue group id 

Follows the support for virtqueue group in vDPA. This patches
introduces uAPI to get the virtqueue group ID for a specific virtqueue
in vhost-vdpa.

Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Gautam Dawar <gdawar@xilinx.com>
Message-Id: <20220330180436.24644-14-gdawar@xilinx.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Gautam Dawar 2022-03-30 23:33:53 +05:30 committed by Michael S. Tsirkin
parent a0c95f2011
commit 2d1fcb7758
2 changed files with 16 additions and 0 deletions
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8
drivers/vhost/vdpa.c
View File

@ -465,6 +465,14 @@ static long vhost_vdpa_vring_ioctl(struct vhost_vdpa *v, unsigned int cmd,
return -EFAULT;
ops->set_vq_ready(vdpa, idx, s.num);
return 0;
case VHOST_VDPA_GET_VRING_GROUP:
s.index = idx;
s.num = ops->get_vq_group(vdpa, idx);
if (s.num >= vdpa->ngroups)
return -EIO;
else if (copy_to_user(argp, &s, sizeof(s)))
return -EFAULT;
return 0;
case VHOST_GET_VRING_BASE:
r = ops->get_vq_state(v->vdpa, idx, &vq_state);
if (r)

8
include/uapi/linux/vhost.h
View File

@ -156,4 +156,12 @@
/* Get the number of address spaces. */
#define VHOST_VDPA_GET_AS_NUM _IOR(VHOST_VIRTIO, 0x7A, unsigned int)
/* Get the group for a virtqueue: read index, write group in num,
* The virtqueue index is stored in the index field of
* vhost_vring_state. The group for this specific virtqueue is
* returned via num field of vhost_vring_state.
*/
#define VHOST_VDPA_GET_VRING_GROUP _IOWR(VHOST_VIRTIO, 0x7B, \
struct vhost_vring_state)
#endif