tree 25a20702eebea21692e61ed758b287f2efa4267d
parent 05b0ebd06ae6b9e72b747362e52abb400a175080
author Christoph Hellwig <hch@lst.de> 1648706481 +0200
committer Christoph Hellwig <hch@lst.de> 1648788411 +0200

dma-mapping: move pgprot_decrypted out of dma_pgprot

pgprot_decrypted is used by AMD SME systems to allow access to memory
that was set to not encrypted using set_memory_decrypted.  That only
happens for dma-direct memory as the IOMMU solves the addressing
challenges for the encryption bit using its own remapping.

Move the pgprot_decrypted call out of dma_pgprot which is also used
by the IOMMU mappings and into dma-direct so that it is only used with
memory that was set decrypted.

Fixes: f5ff79fddf0e ("dma-mapping: remove CONFIG_DMA_REMAP")
Reported-by: Alex Xu (Hello71) <alex_y_xu@yahoo.ca>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Tested-by: Alex Xu (Hello71) <alex_y_xu@yahoo.ca>