877da38313
Simplify the VFIOIOMMUClass interface by removing the dma_map_file handler. Move the logic to decide between the standard virtual and file-backed mapping into the IOMMUFD backend, utilizing the MemoryRegion already passed to the dma_map handler. This removes redundant dispatch logic from the generic container layer and let backends to manage their own mapping strategies. This is similar to the vfio-user implementation. Reviewed-by: Alex Williamson <alex@shazbot.org> Link: https://lore.kernel.org/qemu-devel/20260608055758.359002-1-clg@redhat.com Signed-off-by: Cédric Le Goater <clg@redhat.com>