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| author | Laura Abbott <lauraa@codeaurora.org> | 2014-07-17 16:00:33 -0700 |
|---|---|---|
| committer | Srinivas Kandagatla <srinivas.kandagatla@linaro.org> | 2015-10-16 14:06:59 +0100 |
| commit | 2c07d45b4925c737816314afe561122d552924eb (patch) | |
| tree | 956b80ff4549911eaf40192e1e629fbabcfa5e44 | |
| parent | bbd73941d1364d0ff5282f0f79b8d686f9d04ce3 (diff) | |
arm64: Add support for DMA_ATTR_STRONGLY_ORDERED
Strongly ordered memory prevents speculative accesses among
other features. Add support for this attribute in arm64.
Change-Id: If26459f63edfea3108ad7426e29f98c23b1a07ef
Signed-off-by: Laura Abbott <lauraa@codeaurora.org>
Conflicts:
arch/arm64/mm/dma-mapping.c
Signed-off-by: Stanimir Varbanov <stanimir.varbanov@linaro.org>
| -rw-r--r-- | arch/arm64/mm/dma-mapping.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/arm64/mm/dma-mapping.c b/arch/arm64/mm/dma-mapping.c index 99224dcebdc5..1f18fd686789 100644 --- a/arch/arm64/mm/dma-mapping.c +++ b/arch/arm64/mm/dma-mapping.c @@ -36,6 +36,8 @@ static pgprot_t __get_dma_pgprot(struct dma_attrs *attrs, pgprot_t prot, { if (!coherent || dma_get_attr(DMA_ATTR_WRITE_COMBINE, attrs)) return pgprot_writecombine(prot); + else if (dma_get_attr(DMA_ATTR_STRONGLY_ORDERED, attrs)) + prot = pgprot_noncached(prot); return prot; } |