diff options
Diffstat (limited to 'arch/mips/Kconfig')
| -rw-r--r-- | arch/mips/Kconfig | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index d50fafd7bf3a..aff1cadeea43 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -1119,7 +1119,14 @@ config DMA_PERDEV_COHERENT config DMA_NONCOHERENT bool - select ARCH_HAS_DMA_MMAP_PGPROT + # + # MIPS allows mixing "slightly different" Cacheability and Coherency + # Attribute bits. It is believed that the uncached access through + # KSEG1 and the implementation specific "uncached accelerated" used + # by pgprot_writcombine can be mixed, and the latter sometimes provides + # significant advantages. + # + select ARCH_HAS_DMA_WRITE_COMBINE select ARCH_HAS_SYNC_DMA_FOR_DEVICE select ARCH_HAS_UNCACHED_SEGMENT select NEED_DMA_MAP_STATE |