[PATCH v2 3/5] dma-mapping: Provide CONFIG_ARCH_DMA_DEFAULT_COHERENT

Jiaxun Yang
2023-02-23T11:37:20Z

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

Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
---
kernel/dma/Kconfig | 3 +++
kernel/dma/mapping.c | 2 +-
2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/kernel/dma/Kconfig b/kernel/dma/Kconfig
index 56866aaa2ae1..968108fdf9bf 100644
--- a/kernel/dma/Kconfig
+++ b/kernel/dma/Kconfig
@@ -76,6 +76,9 @@ config ARCH_HAS_DMA_PREP_COHERENT
config ARCH_HAS_FORCE_DMA_UNENCRYPTED
bool

+config ARCH_DMA_DEFAULT_COHERENT
+ bool
+
config SWIOTLB
bool
select NEED_DMA_MAP_STATE
diff --git a/kernel/dma/mapping.c b/kernel/dma/mapping.c
index 80f9663ffe26..9a4db5cce600 100644
--- a/kernel/dma/mapping.c
+++ b/kernel/dma/mapping.c
@@ -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

/*
--
2.37.1 (Apple Git-137.1)