diff options
Diffstat (limited to 'arch/arm/mm/Kconfig')
| -rw-r--r-- | arch/arm/mm/Kconfig | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/arm/mm/Kconfig b/arch/arm/mm/Kconfig index aaea6d487bae..e23ad5ebc330 100644 --- a/arch/arm/mm/Kconfig +++ b/arch/arm/mm/Kconfig @@ -885,6 +885,17 @@ config ARM_DMA_MEM_BUFFERABLE You are recommended say 'Y' here and debug any affected drivers. +config NON_ALIASED_COHERENT_MEM + bool "Avoid aliasing mappings in DMA coherent allocator" if CPU_V7 + help + Avoid multiple mappings with DMA coherent/writecombine allocator by + pre-allocating the mappings, and removing that memory from the + system memory mapping. + + This will make sure DMA memory is fully coherent, so cache + dma_sync APIs will not be necessary to maintain cache cohereny + for DMA coherent region. + config ARCH_HAS_BARRIERS bool help |