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UPSTREAM: vdpa: make get_vq_group and set_group_asid optional

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This patch makes get_vq_group and set_group_asid optional. This is
needed to unbreak the vDPA parent that doesn't support multiple
address spaces.

Cc: Gautam Dawar <gautam.dawar@xilinx.com>
Fixes: aaca8373c4 ("vhost-vdpa: support ASID based IOTLB API")
Signed-off-by: Jason Wang <jasowang@redhat.com>
Message-Id: <20220609041901.2029-1-jasowang@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
(cherry picked from commit 00d1f54647)
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I83cce7173bc7ec6dd00479932d5515bfacb50fe1
This commit is contained in:
Jason Wang 2022-06-09 12:19:01 +08:00 committed by Treehugger Robot
parent b9e82f6f75
commit 3063325104
2 changed files with 5 additions and 2 deletions
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2
drivers/vhost/vdpa.c
View File

@ -499,6 +499,8 @@ static long vhost_vdpa_vring_ioctl(struct vhost_vdpa *v, unsigned int cmd,
ops->set_vq_ready(vdpa, idx, s.num);
return 0;
case VHOST_VDPA_GET_VRING_GROUP:
if (!ops->get_vq_group)
return -EOPNOTSUPP;
s.index = idx;
s.num = ops->get_vq_group(vdpa, idx);
if (s.num >= vdpa->ngroups)

5
include/linux/vdpa.h
View File

@ -176,7 +176,8 @@ struct vdpa_map_file {
* for the device
* @vdev: vdpa device
* Returns virtqueue algin requirement
* @get_vq_group: Get the group id for a specific virtqueue
* @get_vq_group: Get the group id for a specific
* virtqueue (optional)
* @vdev: vdpa device
* @idx: virtqueue index
* Returns u32: group id for this virtqueue
@ -241,7 +242,7 @@ struct vdpa_map_file {
* Returns the iova range supported by
* the device.
* @set_group_asid: Set address space identifier for a
* virtqueue group
* virtqueue group (optional)
* @vdev: vdpa device
* @group: virtqueue group
* @asid: address space id for this group