dma-direct: pass attrs to dma_capable() for DMA_ATTR_CC_SHARED checks

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Teach dma_capable() about DMA_ATTR_CC_SHARED so the capability
check can reject encrypted DMA addresses for devices that require
unencrypted/shared DMA.

Also propagate DMA_ATTR_CC_SHARED in swiotlb_map() when the selected
SWIOTLB pool is decrypted so the capability check sees the correct DMA
address attribute.

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>
Reviewed-by: Petr Tesarik <ptesarik@suse.com>
Signed-off-by: Aneesh Kumar K.V (Arm) <aneesh.kumar@kernel.org>
Link: https://lore.kernel.org/r/20260717180442.110954-16-aneesh.kumar@kernel.org
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>

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This commit is contained in:

Aneesh Kumar K.V (Arm) 2026-07-17 23:34:33 +05:30 • committed by Marek Szyprowski

parent b45e3d35e2

commit 20beb6884b

5 changed files with 32 additions and 22 deletions

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30

arch/x86/kernel/amd_gart_64.c

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6

drivers/xen/swiotlb-xen.c

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10

include/linux/dma-direct.h

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6

kernel/dma/direct.h

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2

kernel/dma/swiotlb.c

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