Commit a0c95f20 authored by Gautam Dawar's avatar Gautam Dawar Committed by Michael S. Tsirkin
Browse files

vhost-vdpa: introduce uAPI to get the number of address spaces 



This patch introduces the uAPI for getting the number of address
spaces supported by this vDPA device.

Signed-off-by: default avatarJason Wang <jasowang@redhat.com>
Signed-off-by: default avatarGautam Dawar <gdawar@xilinx.com>
Message-Id: <20220330180436.24644-13-gdawar@xilinx.com>
Signed-off-by: default avatarMichael S. Tsirkin <mst@redhat.com>
parent 3ace88bd

drivers/vhost/vdpa.c

+3 −0
Original line number Diff line number Diff line
@@ -563,6 +563,9 @@ static long vhost_vdpa_unlocked_ioctl(struct file *filep, 
		r = copy_to_user(argp, &v->vdpa->ngroups,

				 sizeof(v->vdpa->ngroups));

		break;

	case VHOST_VDPA_GET_AS_NUM:

		r = copy_to_user(argp, &v->vdpa->nas, sizeof(v->vdpa->nas));

		break;

	case VHOST_SET_LOG_BASE:

	case VHOST_SET_LOG_FD:

		r = -ENOIOCTLCMD;

include/uapi/linux/vhost.h

+2 −0
Original line number Diff line number Diff line
@@ -154,4 +154,6 @@ 
/* Get the number of virtqueue groups. */

#define VHOST_VDPA_GET_GROUP_NUM	_IOR(VHOST_VIRTIO, 0x81, __u32)



/* Get the number of address spaces. */

#define VHOST_VDPA_GET_AS_NUM		_IOR(VHOST_VIRTIO, 0x7A, unsigned int)

#endif