Commit 7b9a74bd authored Mar 30, 2022 by Gautam Dawar Committed by Pengyuan Zhao Dec 13, 2022

vhost-vdpa: uAPI to get virtqueue group id

mainline inclusion
from mainline-v5.19-rc1
commit 2d1fcb77
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I5WXCZ
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=2d1fcb7758e49fd9caf150f3c70804b95b2ce80c



----------------------------------------------------------------------

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>
Signed-off-by: Pengyuan Zhao <zhaopengyuan@hisilicon.com>

parent 6255fb8b

drivers/vhost/vdpa.c

+8 −0

Original line number	Diff line number	Diff line
		@@ -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)

include/uapi/linux/vhost.h

+8 −0

Original line number	Diff line number	Diff line
		@@ -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