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21c03574df
fsl_pamu is the last user of domain_alloc(), and it is using it to create something weird that doesn't really fit into the iommu subsystem architecture. It is a not a paging domain since it doesn't have any map/unmap ops. It may be some special kind of identity domain. For now just leave it as is. Wrap it's definition in CONFIG_FSL_PAMU to discourage any new drivers from attempting to use it. Reviewed-by: Lu Baolu <baolu.lu@linux.intel.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com> Reviewed-by: Kevin Tian <kevin.tian@intel.com> Link: https://lore.kernel.org/r/5-v4-ff5fb6b03bd1+288-iommu_virtio_domains_jgg@nvidia.com Signed-off-by: Joerg Roedel <jroedel@suse.de>