Commit 82fef0ad authored by David Rientjes's avatar David Rientjes Committed by Christoph Hellwig
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x86/mm: unencrypted non-blocking DMA allocations use coherent pools 



When CONFIG_AMD_MEM_ENCRYPT is enabled and a device requires unencrypted
DMA, all non-blocking allocations must originate from the atomic DMA
coherent pools.

Select CONFIG_DMA_COHERENT_POOL for CONFIG_AMD_MEM_ENCRYPT.

Signed-off-by: default avatarDavid Rientjes <rientjes@google.com>
Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
parent 2edc5bb3

arch/x86/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -1520,6 +1520,7 @@ config X86_CPA_STATISTICS 
config AMD_MEM_ENCRYPT

	bool "AMD Secure Memory Encryption (SME) support"

	depends on X86_64 && CPU_SUP_AMD

	select DMA_COHERENT_POOL

	select DYNAMIC_PHYSICAL_MASK

	select ARCH_USE_MEMREMAP_PROT

	select ARCH_HAS_FORCE_DMA_UNENCRYPTED

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