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Commit e41b1355 authored by Michael S. Tsirkin's avatar Michael S. Tsirkin
Browse files

virtio_balloon: disable VIOMMU support 



virtio balloon bypasses the DMA API entirely so does not support the
VIOMMU right now.  It's not clear we need that support, for now let's
just make sure we don't pretend to support it.

Cc: stable@vger.kernel.org
Cc: Wei Wang <wei.w.wang@intel.com>
Fixes: 1a937693 ("virtio: new feature to detect IOMMU device quirk")
Signed-off-by: default avatarMichael S. Tsirkin <mst@redhat.com>
Acked-by: default avatarJason Wang <jasowang@redhat.com>
parent 32c1431e

drivers/virtio/virtio_balloon.c

+7 −0
Original line number Diff line number Diff line
@@ -663,6 +663,12 @@ static int virtballoon_restore(struct virtio_device *vdev) 
}

#endif



static int virtballoon_validate(struct virtio_device *vdev)

{

	__virtio_clear_bit(vdev, VIRTIO_F_IOMMU_PLATFORM);

	return 0;

}



static unsigned int features[] = {

	VIRTIO_BALLOON_F_MUST_TELL_HOST,

	VIRTIO_BALLOON_F_STATS_VQ,
@@ -675,6 +681,7 @@ static struct virtio_driver virtio_balloon_driver = { 
	.driver.name =	KBUILD_MODNAME,

	.driver.owner =	THIS_MODULE,

	.id_table =	id_table,

	.validate =	virtballoon_validate,

	.probe =	virtballoon_probe,

	.remove =	virtballoon_remove,

	.config_changed = virtballoon_changed,