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authorThierry Reding <treding@nvidia.com>2019-10-16 14:50:26 +0300
committerJoerg Roedel <jroedel@suse.de>2019-10-18 12:46:11 +0300
commit96d3ab802e4930a29a33934373157d6dff1b2c7e (patch)
tree865c8369b01a79df48785d07c22a164c91ff2092 /drivers/iommu/Kconfig
parente31e5929547edf396ea2c0873244c734c6bceafa (diff)
downloadlinux-96d3ab802e4930a29a33934373157d6dff1b2c7e.tar.xz
iommu/tegra-smmu: Fix page tables in > 4 GiB memory
Page tables that reside in physical memory beyond the 4 GiB boundary are currently not working properly. The reason is that when the physical address for page directory entries is read, it gets truncated at 32 bits and can cause crashes when passing that address to the DMA API. Fix this by first casting the PDE value to a dma_addr_t and then using the page frame number mask for the SMMU instance to mask out the invalid bits, which are typically used for mapping attributes, etc. Signed-off-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu/Kconfig')
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