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vfio/spapr_tce: reject mediated devices

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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>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Link: https://lore.kernel.org/r/20210924155705.4258-13-hch@lst.de
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
This commit is contained in:
Christoph Hellwig 2021-09-24 17:57:02 +02:00 committed by Alex Williamson
parent c3c0fa9d94
commit 8986390414
1 changed files with 3 additions and 0 deletions
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drivers/vfio/vfio_iommu_spapr_tce.c
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@ -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 (type == VFIO_EMULATED_IOMMU)
return -EINVAL;
mutex_lock(&container->lock);
/* pr_debug("tce_vfio: Attaching group #%u to iommu %p\n",