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Commit 20df31ae authored by Rohit Vaswani's avatar Rohit Vaswani Committed by Sathish Ambley
Browse files

common: DMA-mapping: Add EXEC_MAPPING attribute 



DMA_ATTR_EXEC_MAPPING specifies that an executable mapping
should be created for the requested buffer. By default, the
DMA mappings are non-executable.

Change-Id: I135077e14996e92fa9d199bdee043c443db48924
Signed-off-by: default avatarRohit Vaswani <rvaswani@codeaurora.org>
parent d837ea84

Documentation/DMA-attributes.txt

+7 −0
Original line number Diff line number Diff line
@@ -119,3 +119,10 @@ reference so that when the buffer is freed, the mapping is not destroyed 
and can be re-used. By specifying this attribute, an additional reference

will NOT be held by the lazy mapping code and it will be released as soon

as the buffer is freed.



DMA_ATTR_EXEC_MAPPING

---------------------



By default, the DMA mappings are non-executable. Some use cases might require

an executable mapping. This attribute can be used to indicate to the DMA

subsystem to create an executable mappings for the buffer.

include/linux/dma-attrs.h

+1 −0
Original line number Diff line number Diff line
@@ -21,6 +21,7 @@ enum dma_attr { 
	DMA_ATTR_STRONGLY_ORDERED,

	DMA_ATTR_SKIP_ZEROING,

	DMA_ATTR_NO_DELAYED_UNMAP,

	DMA_ATTR_EXEC_MAPPING,

	DMA_ATTR_MAX,

};