iommu/arm-smmu: add NVIDIA implementation for ARM MMU-500 usage
NVIDIA's Tegra194 SoC has three ARM MMU-500 instances. It uses two of the ARM MMU-500s together to interleave IOVA accesses across them and must be programmed identically. This implementation supports programming the two ARM MMU-500s that must be programmed identically. The third ARM MMU-500 instance is supported by standard arm-smmu.c driver itself. Signed-off-by: NKrishna Reddy <vdumpa@nvidia.com> Reviewed-by: NJon Hunter <jonathanh@nvidia.com> Reviewed-by: NNicolin Chen <nicoleotsuka@gmail.com> Reviewed-by: NPritesh Raithatha <praithatha@nvidia.com> Reviewed-by: NRobin Murphy <robin.murphy@arm.com> Reviewed-by: NThierry Reding <thierry.reding@gmail.com> Link: https://lore.kernel.org/r/20200718193457.30046-4-vdumpa@nvidia.comSigned-off-by: NWill Deacon <will@kernel.org>
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drivers/iommu/arm-smmu-nvidia.c
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