diff options
| author | Gautam Dawar <gautam.dawar@xilinx.com> | 2022-03-30 23:33:53 +0530 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2022-05-31 12:44:31 -0400 |
| commit | 2d1fcb7758e49fd9caf150f3c70804b95b2ce80c (patch) | |
| tree | e09a70ca518caeb84fad1a8902eb42c14cedb40b | |
| parent | a0c95f201170bd559737d3cdc8a950aea62f29c6 (diff) | |
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>
| -rw-r--r-- | drivers/vhost/vdpa.c | 8 | ||||
| -rw-r--r-- | include/uapi/linux/vhost.h | 8 |
2 files changed, 16 insertions, 0 deletions
diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c index a017011ad1f5..aa5cacdc5263 100644 --- a/drivers/vhost/vdpa.c +++ b/drivers/vhost/vdpa.c @@ -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) diff --git a/include/uapi/linux/vhost.h b/include/uapi/linux/vhost.h index 51322008901a..668914c87f74 100644 --- a/include/uapi/linux/vhost.h +++ b/include/uapi/linux/vhost.h @@ -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 |