diff mbox series

[12/14] vfio/spapr_tce: reject mediated devices

Message ID 20210811151500.2744-13-hch@lst.de (mailing list archive)
State New, archived
Headers show
Series [01/14] vfio: Move vfio_iommu_group_get() to vfio_register_group_dev() | expand

Commit Message

Christoph Hellwig Aug. 11, 2021, 3:14 p.m. UTC 
Unlike the the type1 IOMMU backend, the SPAPR one does not contain any
support for the magic non-IOMMU backed iommu_group used by mediated
devices, so reject them in ->attach_group.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 drivers/vfio/vfio_iommu_spapr_tce.c | 3 +++
 1 file changed, 3 insertions(+)
diff mbox series

Patch

diff --git a/drivers/vfio/vfio_iommu_spapr_tce.c b/drivers/vfio/vfio_iommu_spapr_tce.c
index 7567328d347d25..779d4e985d825f 100644
--- a/drivers/vfio/vfio_iommu_spapr_tce.c
+++ b/drivers/vfio/vfio_iommu_spapr_tce.c
@@ -1246,6 +1246,9 @@  static int tce_iommu_attach_group(void *iommu_data,
 	struct iommu_table_group *table_group;
 	struct tce_iommu_group *tcegrp = NULL;
 
+	if (flags & VFIO_MEDIATED)
+		return -EINVAL;
+
 	mutex_lock(&container->lock);
 
 	/* pr_debug("tce_vfio: Attaching group #%u to iommu %p\n",