[PATCH v10] vfio: ABI for mdev display dma-buf operation

[Gerd Hoffmann]

  Hi,

> There could be only two planes, one DRM_PLANE_TYPE_PRIMARY and one
> DRM_PLANE_TYPE_CURSOR.
> Steps from gfx_update for region case would be:
> - VFIO_DEVICE_QUERY_GFX_PLANE with plane_type =
> DRM_PLANE_TYPE_PRIMARY

> - if vfio_device_gfx_plane_info.size > 0, read region for primary
> surface and update console surface

Why?  I suspect you want notify the caller whenever the surface has
been updated or not?  If so we should add an explicit flag or field for
that.

cheers,
  Gerd