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dma-pool: decouple DMA_REMAP from DMA_COHERENT_POOL

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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) <[email protected]>
Signed-off-by: David Rientjes <[email protected]>
Tested-by: Alex Xu (Hello71) <[email protected]>
Signed-off-by: Christoph Hellwig <[email protected]>
This commit is contained in:
David Rientjes authored and Christoph Hellwig committed 2020-06-15 08:35:30 +02:00
1 parent 3ee06a6d53
commit dbed452a07
1 file changed
+5 -5
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kernel/dma/Kconfig
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@@ -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