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dma-pool: decouple DMA_REMAP from DMA_COHERENT_POOL 

DMA_REMAP is an unnecessary requirement for AMD SEV, which requires
DMA_COHERENT_POOL, so avoid selecting it when it is otherwise unnecessary.

The only other requirement for DMA coherent pools is DMA_DIRECT_REMAP, so
ensure that properly selects the config option when needed.

Fixes: 82fef0ad81 ("x86/mm: unencrypted non-blocking DMA allocations use coherent pools")
Reported-by: Alex Xu (Hello71) <alex_y_xu@yahoo.ca>
Signed-off-by: David Rientjes <rientjes@google.com>
Tested-by: Alex Xu (Hello71) <alex_y_xu@yahoo.ca>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
David Rientjes 2020-06-11 00:25:57 -07:00 committed by Christoph Hellwig
parent 3ee06a6d53
commit dbed452a07
1 changed files with 5 additions and 5 deletions
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10
kernel/dma/Kconfig
View File

@ -73,18 +73,18 @@ config SWIOTLB
config DMA_NONCOHERENT_MMAP
bool
config DMA_COHERENT_POOL
bool
config DMA_REMAP
bool
depends on MMU
select GENERIC_ALLOCATOR
select DMA_NONCOHERENT_MMAP
bool
config DMA_COHERENT_POOL
bool
select DMA_REMAP
config DMA_DIRECT_REMAP
bool
select DMA_REMAP
select DMA_COHERENT_POOL
config DMA_CMA