Commit 84d7c8fd authored Mar 30, 2022 by Gautam Dawar Committed by Michael S. Tsirkin May 31, 2022

vhost-vdpa: introduce uAPI to set group ASID



Follows the vDPA support for associating ASID to a specific virtqueue
group. This patch adds a uAPI to support setting them from userspace.

Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Gautam Dawar <gdawar@xilinx.com>
Message-Id: <20220330180436.24644-15-gdawar@xilinx.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

parent 2d1fcb77

drivers/vhost/vdpa.c

+8 −0

Original line number	Diff line number	Diff line
		@@ -473,6 +473,14 @@ static long vhost_vdpa_vring_ioctl(struct vhost_vdpa *v, unsigned int cmd,
		else if (copy_to_user(argp, &s, sizeof(s)))
		return -EFAULT;
		return 0;
		case VHOST_VDPA_SET_GROUP_ASID:
		if (copy_from_user(&s, argp, sizeof(s)))
		return -EFAULT;
		if (s.num >= vdpa->nas)
		return -EINVAL;
		if (!ops->set_group_asid)
		return -EOPNOTSUPP;
		return ops->set_group_asid(vdpa, idx, s.num);
		case VHOST_GET_VRING_BASE:
		r = ops->get_vq_state(v->vdpa, idx, &vq_state);
		if (r)

include/uapi/linux/vhost.h

+7 −0

Original line number	Diff line number	Diff line
		@@ -164,4 +164,11 @@
		*/
		#define VHOST_VDPA_GET_VRING_GROUP _IOWR(VHOST_VIRTIO, 0x7B, \
		struct vhost_vring_state)
		/* Set the ASID for a virtqueue group. The group index is stored in
		* the index field of vhost_vring_state, the ASID associated with this
		* group is stored at num field of vhost_vring_state.
		*/
		#define VHOST_VDPA_SET_GROUP_ASID _IOW(VHOST_VIRTIO, 0x7C, \
		struct vhost_vring_state)

		#endif