Re: [PATCH v5] iommu/tegra-smmu: Add pagetable mappings to debugfs

[Dmitry Osipenko]

15.03.2021 23:36, Nicolin Chen пишет:
> +static unsigned long pd_pt_index_iova(unsigned int pd_index, unsigned int pt_index)
> +{
> +	return ((dma_addr_t)pd_index & (SMMU_NUM_PDE - 1)) << SMMU_PDE_SHIFT |
> +	       ((dma_addr_t)pt_index & (SMMU_NUM_PTE - 1)) << SMMU_PTE_SHIFT;
> +}

Looking at this again, I'm now wondering whether will be better to
replace dma_addr_t with u32 everywhere since SMMU only supports 32bits
for IOVA.