The option takes values of "virtio-scsi", "virtio-blk" (with the latter being the default). It maps on the convert option with the same name introduced in the previous commits, thus allowing us to alter the order in which the VirtIO block drivers are going to be searched for. This is useful if we want the virtio-scsi driver to be installed during conversion instead of the default virtio-blk. Also update the docs accordingly. Originally-by: Richard W.M. Jones <rjones@redhat.com> Signed-off-by: Andrey Drobyshev <andrey.drobyshev@virtuozzo.com> Message-Id: <20230310175433.781335-6-andrey.drobyshev@virtuozzo.com> Reviewed-by: Richard W.M. Jones <rjones@redhat.com> Acked-by: Laszlo Ersek <lersek@redhat.com> [lersek@redhat.com: fix the docs to placate "test-v2v-docs.sh"]