diff options
Diffstat (limited to 'kernel/dma/Kconfig')
| -rw-r--r-- | kernel/dma/Kconfig | 24 |
1 files changed, 18 insertions, 6 deletions
diff --git a/kernel/dma/Kconfig b/kernel/dma/Kconfig index 9decbba255fc..4c103a24e380 100644 --- a/kernel/dma/Kconfig +++ b/kernel/dma/Kconfig @@ -20,6 +20,15 @@ config ARCH_HAS_DMA_COHERENCE_H config ARCH_HAS_DMA_SET_MASK bool +# +# Select this option if the architecture needs special handling for +# DMA_ATTR_WRITE_COMBINE. Normally the "uncached" mapping should be what +# people thing of when saying write combine, so very few platforms should +# need to enable this. +# +config ARCH_HAS_DMA_WRITE_COMBINE + bool + config DMA_DECLARE_COHERENT bool @@ -42,12 +51,6 @@ config ARCH_HAS_SYNC_DMA_FOR_CPU_ALL config ARCH_HAS_DMA_PREP_COHERENT bool -config ARCH_HAS_DMA_COHERENT_TO_PFN - bool - -config ARCH_HAS_DMA_MMAP_PGPROT - bool - config ARCH_HAS_FORCE_DMA_UNENCRYPTED bool @@ -62,9 +65,18 @@ config SWIOTLB bool select NEED_DMA_MAP_STATE +# +# Should be selected if we can mmap non-coherent mappings to userspace. +# The only thing that is really required is a way to set an uncached bit +# in the pagetables +# +config DMA_NONCOHERENT_MMAP + bool + config DMA_REMAP depends on MMU select GENERIC_ALLOCATOR + select DMA_NONCOHERENT_MMAP bool config DMA_DIRECT_REMAP |
