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

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

Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Gautam Dawar <gdawar@xilinx.com>
Message-Id: <20220330180436.24644-13-gdawar@xilinx.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Gautam Dawar 2022-03-30 23:33:52 +05:30 committed by Michael S. Tsirkin
parent 3ace88bd37
commit a0c95f2011
2 changed files with 5 additions and 0 deletions
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3
drivers/vhost/vdpa.c
View File

@ -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;

2
include/uapi/linux/vhost.h
View File

@ -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