Commit 1d3f56b2 authored by Jiaxun Yang's avatar Jiaxun Yang Committed by Christoph Hellwig
Browse files

dma-mapping: provide CONFIG_ARCH_DMA_DEFAULT_COHERENT 



Provide a kconfig option to allow arches to manipulate default
value of dma_default_coherent in Kconfig.

Signed-off-by: default avatarJiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
parent fe4e5efa

kernel/dma/Kconfig

+7 −0
Original line number Diff line number Diff line
@@ -76,6 +76,13 @@ config ARCH_HAS_DMA_PREP_COHERENT 
config ARCH_HAS_FORCE_DMA_UNENCRYPTED

	bool



#

# Select this option if the architecture assumes DMA devices are coherent

# by default.

#

config ARCH_DMA_DEFAULT_COHERENT

	bool



config SWIOTLB

	bool

	select NEED_DMA_MAP_STATE

kernel/dma/mapping.c

+1 −1
Original line number Diff line number Diff line
@@ -20,7 +20,7 @@ 
#if defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_DEVICE) || \

	defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU) || \

	defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU_ALL)

bool dma_default_coherent;

bool dma_default_coherent = IS_ENABLED(CONFIG_ARCH_DMA_DEFAULT_COHERENT);

#endif



/*