dma-mapping: make dma_pgprot() honor __DMA_ATTR_ALLOC_CC_SHARED

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Fold encrypted/decrypted pgprot selection into dma_pgprot() so callers
do not need to adjust the page protection separately.

Update dma_pgprot() to apply pgprot_decrypted() when DMA_ATTR_CC_SHARED or
__DMA_ATTR_ALLOC_CC_SHARED is set and pgprot_encrypted() otherwise Convert
the dma-direct mmap paths to pass DMA_ATTR_CC_SHARED instead of open-coding
force_dma_unencrypted() handling around dma_pgprot().

Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Tested-by: Jiri Pirko <jiri@nvidia.com>
Tested-by: Michael Kelley <mhklinux@outlook.com>
Tested-by: Mostafa Saleh <smostafa@google.com>
Signed-off-by: Aneesh Kumar K.V (Arm) <aneesh.kumar@kernel.org>
Link: https://lore.kernel.org/r/20260717180442.110954-15-aneesh.kumar@kernel.org
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>

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Aneesh Kumar K.V (Arm) 2026-07-17 23:34:32 +05:30 • committed by Marek Szyprowski

parent d5fd03cdd6

commit b45e3d35e2

2 changed files with 15 additions and 9 deletions

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8

kernel/dma/direct.c

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16

kernel/dma/mapping.c

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