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authorCatalin Marinas <catalin.marinas@arm.com>2014-03-12 16:07:06 +0000
committerAlex Shi <alex.shi@linaro.org>2014-05-29 09:18:41 +0800
commit706001e698a732b4f3f551524730ab33dbb9239d (patch)
tree0b1abbaf2fa0328e01421c89b44a84b35aefcf66
parent64fb9c18d5c50ce9698c99925294c55f71f15266 (diff)
downloadlinux-linaro-stable-v3.14/topic/arm64-lts.tar.gz
arm64: Make DMA coherent and strongly ordered mappings not executablev3.14/topic/arm64-lts
pgprot_{dmacoherent,writecombine,noncached} don't need to generate executable mappings with side-effects like __sync_icache_dcache() being called when the mapping is in user space. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Reported-by: Bharat Bhushan <Bharat.Bhushan@freescale.com> Tested-by: Laura Abbott <lauraa@codeaurora.org> Tested-by: Bharat Bhushan <Bharat.Bhushan@freescale.com> Cc: <stable@vger.kernel.org> (cherry picked from upstream commit de2db7432917a82b62d55bb59635586eeca6d1bd) Signed-off-by: Alex Shi <alex.shi@linaro.org>
-rw-r--r--arch/arm64/include/asm/pgtable.h6
1 files changed, 3 insertions, 3 deletions
diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h
index cdfdee7..acb17e0 100644
--- a/arch/arm64/include/asm/pgtable.h
+++ b/arch/arm64/include/asm/pgtable.h
@@ -286,11 +286,11 @@ static inline int has_transparent_hugepage(void)
* Mark the prot value as uncacheable and unbufferable.
*/
#define pgprot_noncached(prot) \
- __pgprot_modify(prot, PTE_ATTRINDX_MASK, PTE_ATTRINDX(MT_DEVICE_nGnRnE))
+ __pgprot_modify(prot, PTE_ATTRINDX_MASK, PTE_ATTRINDX(MT_DEVICE_nGnRnE) | PTE_PXN | PTE_UXN)
#define pgprot_writecombine(prot) \
- __pgprot_modify(prot, PTE_ATTRINDX_MASK, PTE_ATTRINDX(MT_NORMAL_NC))
+ __pgprot_modify(prot, PTE_ATTRINDX_MASK, PTE_ATTRINDX(MT_NORMAL_NC) | PTE_PXN | PTE_UXN)
#define pgprot_dmacoherent(prot) \
- __pgprot_modify(prot, PTE_ATTRINDX_MASK, PTE_ATTRINDX(MT_NORMAL_NC))
+ __pgprot_modify(prot, PTE_ATTRINDX_MASK, PTE_ATTRINDX(MT_NORMAL_NC) | PTE_PXN | PTE_UXN)
#define __HAVE_PHYS_MEM_ACCESS_PROT
struct file;
extern pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn,