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962bcf0911
VFIO type1 kernel uAPI supports unmapping whole address space in one call
since commit c19650995374 ("vfio/type1: implement unmap all"). Use the
unmap_all variant whenever it's supported in kernel.
Opportunistically pass VFIOLegacyContainer pointer in low level function
vfio_legacy_dma_unmap_one().
Co-developed-by: John Levon <levon@movementarian.org>
Signed-off-by: John Levon <levon@movementarian.org>
Signed-off-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
Reviewed-by: Cédric Le Goater <clg@redhat.com>
Link: https://lore.kernel.org/qemu-devel/20251009040134.334251-2-zhenzhong.duan@intel.com
Signed-off-by: Cédric Le Goater <clg@redhat.com>