This helper will allow to convey information about valid IOVA ranges to virtual IOMMUS. Signed-off-by: Eric Auger <eric.auger@redhat.com> Acked-by: Peter Xu <peterx@redhat.com> Reviewed-by: "Michael S. Tsirkin" <mst@redhat.com> [ clg: fixes in memory_region_iommu_set_iova_ranges() and iommu_set_iova_ranges() documentation ] Signed-off-by: Cédric Le Goater <clg@redhat.com>