vdpa: add get_backend_features vdpa operation

[tomoyo/tomoyo-test1.git] / include / linux / vdpa.h

diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h
index db1b0ea..0e65202 100644 (file)
--- a/include/linux/vdpa.h
+++ b/include/linux/vdpa.h
@@ -208,6 +208,9 @@ struct vdpa_map_file {
  *                             @vdev: vdpa device
  *                             Returns the virtio features support by the
  *                             device
+ * @get_backend_features:      Get parent-specific backend features (optional)
+ *                             Returns the vdpa features supported by the
+ *                             device.
  * @set_driver_features:       Set virtio features supported by the driver
  *                             @vdev: vdpa device
  *                             @features: feature support by the driver
@@ -358,6 +361,7 @@ struct vdpa_config_ops {
        u32 (*get_vq_align)(struct vdpa_device *vdev);
        u32 (*get_vq_group)(struct vdpa_device *vdev, u16 idx);
        u64 (*get_device_features)(struct vdpa_device *vdev);
+       u64 (*get_backend_features)(const struct vdpa_device *vdev);
        int (*set_driver_features)(struct vdpa_device *vdev, u64 features);
        u64 (*get_driver_features)(struct vdpa_device *vdev);
        void (*set_config_cb)(struct vdpa_device *vdev,