iommu/tegra-smmu: Respect IOMMU API read-write protections
Set PTE read/write attributes accordingly to the the protections requested by IOMMU API. Signed-off-by: Dmitry Osipenko <digetx@gmail.com> Acked-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
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@ -145,8 +145,6 @@ static inline u32 smmu_readl(struct tegra_smmu *smmu, unsigned long offset)
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#define SMMU_PDE_ATTR (SMMU_PDE_READABLE | SMMU_PDE_WRITABLE | \
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SMMU_PDE_NONSECURE)
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#define SMMU_PTE_ATTR (SMMU_PTE_READABLE | SMMU_PTE_WRITABLE | \
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SMMU_PTE_NONSECURE)
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static unsigned int iova_pd_index(unsigned long iova)
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{
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@ -659,6 +657,7 @@ static int tegra_smmu_map(struct iommu_domain *domain, unsigned long iova,
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{
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struct tegra_smmu_as *as = to_smmu_as(domain);
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dma_addr_t pte_dma;
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u32 pte_attrs;
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u32 *pte;
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pte = as_get_pte(as, iova, &pte_dma);
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@ -669,8 +668,16 @@ static int tegra_smmu_map(struct iommu_domain *domain, unsigned long iova,
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if (*pte == 0)
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tegra_smmu_pte_get_use(as, iova);
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pte_attrs = SMMU_PTE_NONSECURE;
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if (prot & IOMMU_READ)
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pte_attrs |= SMMU_PTE_READABLE;
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if (prot & IOMMU_WRITE)
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pte_attrs |= SMMU_PTE_WRITABLE;
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tegra_smmu_set_pte(as, iova, pte, pte_dma,
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__phys_to_pfn(paddr) | SMMU_PTE_ATTR);
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__phys_to_pfn(paddr) | pte_attrs);
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return 0;
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}
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