diff options
| author | Si-Wei Liu <si-wei.liu@oracle.com> | 2023-10-18 20:14:42 +0300 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2023-11-01 16:19:55 +0300 |
| commit | 7db0d6027e69f47431800b510192436563ba415b (patch) | |
| tree | 8e59125cf20af68e38ef87fc121767d2f44c00f8 /include/uapi/linux | |
| parent | a72cac6067fdfde280ece0ec5c055659a8de6508 (diff) | |
| download | linux-7db0d6027e69f47431800b510192436563ba415b.tar.xz | |
vhost-vdpa: introduce descriptor group backend feature
Userspace knows if the device has dedicated descriptor group or not
by checking this feature bit.
It's only exposed if the vdpa driver backend implements the
.get_vq_desc_group() operation callback. Userspace trying to negotiate
this feature when it or the dependent _F_IOTLB_ASID feature hasn't
been exposed will result in an error.
Signed-off-by: Si-Wei Liu <si-wei.liu@oracle.com>
Acked-by: Eugenio Pérez <eperezma@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Message-Id: <20231018171456.1624030-5-dtatulea@nvidia.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Si-Wei Liu <si-wei.liu@oracle.com>
Tested-by: Si-Wei Liu <si-wei.liu@oracle.com>
Tested-by: Lei Yang <leiyang@redhat.com>
Diffstat (limited to 'include/uapi/linux')
| -rw-r--r-- | include/uapi/linux/vhost_types.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/uapi/linux/vhost_types.h b/include/uapi/linux/vhost_types.h index 2d827d22cd99..18ad6ae7ab5c 100644 --- a/include/uapi/linux/vhost_types.h +++ b/include/uapi/linux/vhost_types.h @@ -185,5 +185,10 @@ struct vhost_vdpa_iova_range { * DRIVER_OK */ #define VHOST_BACKEND_F_ENABLE_AFTER_DRIVER_OK 0x6 +/* Device may expose the virtqueue's descriptor area, driver area and + * device area to a different group for ASID binding than where its + * buffers may reside. Requires VHOST_BACKEND_F_IOTLB_ASID. + */ +#define VHOST_BACKEND_F_DESC_ASID 0x7 #endif |