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Lu Baolu authored
When using first-level translation for IOVA, currently the U/S bit in the page table is cleared which implies DMA requests with user privilege are blocked. As the result, following error messages might be observed when passing through a device to user level: DMAR: DRHD: handling fault status reg 3 DMAR: [DMA Read] Request device [41:00.0] PASID 1 fault addr 7ecdcd000 [fault reason 129] SM: U/S set 0 for first-level translation with user privilege This fixes it by setting U/S bit in the first level page table and makes IOVA over first level compatible with previous second-level translation. Fixes: b802d070 ("iommu/vt-d: Use iova over first level") Reported-by:
Xin Zeng <xin.zeng@intel.com> Signed-off-by:
Lu Baolu <baolu.lu@linux.intel.com> Link: https://lore.kernel.org/r/20200622231345.29722-3-baolu.lu@linux.intel.comSigned-off-by:
Joerg Roedel <jroedel@suse.de>
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