diff options
Diffstat (limited to 'kernel/dma/Kconfig')
| -rw-r--r-- | kernel/dma/Kconfig | 20 |
1 files changed, 15 insertions, 5 deletions
diff --git a/kernel/dma/Kconfig b/kernel/dma/Kconfig index 1da3f44f2565..847a9d1fa634 100644 --- a/kernel/dma/Kconfig +++ b/kernel/dma/Kconfig @@ -1,10 +1,24 @@ # SPDX-License-Identifier: GPL-2.0-only +config NO_DMA + bool + config HAS_DMA bool depends on !NO_DMA default y +config DMA_OPS + bool + +# +# IOMMU drivers that can bypass the IOMMU code and optionally use the direct +# mapping fast path should select this option and set the dma_ops_bypass +# flag in struct device where applicable +# +config DMA_OPS_BYPASS + bool + config NEED_SG_DMA_LENGTH bool @@ -60,6 +74,7 @@ config DMA_NONCOHERENT_CACHE_SYNC config DMA_VIRT_OPS bool depends on HAS_DMA + select DMA_OPS config SWIOTLB bool @@ -174,11 +189,6 @@ config DMA_API_DEBUG drivers like double-freeing of DMA mappings or freeing mappings that were never allocated. - This also attempts to catch cases where a page owned by DMA is - accessed by the cpu in a way that could cause data corruption. For - example, this enables cow_user_page() to check that the source page is - not undergoing DMA. - This option causes a performance degradation. Use only if you want to debug device drivers and dma interactions. |