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 --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",

-- 
2.30.2