Messages in this thread Patch in this message | | | Date | Thu, 11 Jun 2020 00:25:57 -0700 (PDT) | From | David Rientjes <> | Subject | [patch for-5.8] 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: 82fef0ad811f ("x86/mm: unencrypted non-blocking DMA allocations use coherent pools") Suggested-by: Christoph Hellwig <hch@lst.de> Signed-off-by: David Rientjes <rientjes@google.com> --- kernel/dma/Kconfig | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/kernel/dma/Kconfig b/kernel/dma/Kconfig --- a/kernel/dma/Kconfig +++ b/kernel/dma/Kconfig @@ -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
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