Commit d1bc7d40 authored by Gautam Dawar's avatar Gautam Dawar Committed by Pengyuan Zhao
Browse files

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

mainline inclusion
from mainline-v5.19-rc1
commit 3ace88bd
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=3ace88bd37436abc84906312146fe5158a469142



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

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>
Signed-off-by: default avatarPengyuan Zhao <zhaopengyuan@hisilicon.com>
parent c3eb1b78

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