Patch "arm64: Make DMA coherent and strongly ordered mappings not executable" has been added to the 3.14-stable tree

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This is a note to let you know that I've just added the patch titled

    arm64: Make DMA coherent and strongly ordered mappings not executable

to the 3.14-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     arm64-make-dma-coherent-and-strongly-ordered-mappings-not-executable.patch
and it can be found in the queue-3.14 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.


>From de2db7432917a82b62d55bb59635586eeca6d1bd Mon Sep 17 00:00:00 2001
From: Catalin Marinas <catalin.marinas@xxxxxxx>
Date: Wed, 12 Mar 2014 16:07:06 +0000
Subject: arm64: Make DMA coherent and strongly ordered mappings not executable

From: Catalin Marinas <catalin.marinas@xxxxxxx>

commit de2db7432917a82b62d55bb59635586eeca6d1bd upstream.

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@xxxxxxx>
Reported-by: Bharat Bhushan <Bharat.Bhushan@xxxxxxxxxxxxx>
Tested-by: Laura Abbott <lauraa@xxxxxxxxxxxxxx>
Tested-by: Bharat Bhushan <Bharat.Bhushan@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 arch/arm64/include/asm/pgtable.h |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

--- a/arch/arm64/include/asm/pgtable.h
+++ b/arch/arm64/include/asm/pgtable.h
@@ -286,11 +286,11 @@ static inline int has_transparent_hugepa
  * 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,


Patches currently in stable-queue which might be from catalin.marinas@xxxxxxx are

queue-3.14/arm64-make-dma-coherent-and-strongly-ordered-mappings-not-executable.patch
queue-3.14/arm64-do-not-synchronise-i-and-d-caches-for-special-ptes.patch
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