linux-kernel - Re: [PATCH v2 05/20] ARM: LPAE: Introduce L_PTE_NOEXEC and L_PTE

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Date:	Wed, 17 Nov 2010 17:24:25 +0000
From:	Russell King - ARM Linux <linux@....linux.org.uk>
To:	Catalin Marinas <catalin.marinas@....com>
Cc:	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 05/20] ARM: LPAE: Introduce L_PTE_NOEXEC and
	L_PTE_NOWRITE

On Wed, Nov 17, 2010 at 05:22:12PM +0000, Catalin Marinas wrote:
> Ah, good point, that was the mask.
> 
> So for dmacoherent we make sure that L_PTE_EXEC is cleared. I suspect
> we should now make sure that L_PTE_NOEXEC is set. For the other two,
> just leave them as they are.

Already done:

 #define pgprot_dmacoherent(prot) \
-       __pgprot_modify(prot, L_PTE_MT_MASK|L_PTE_EXEC, L_PTE_MT_BUFFERABLE)
+       __pgprot_modify(prot, L_PTE_MT_MASK, L_PTE_MT_BUFFERABLE|L_PTE_XN)
...
 #define pgprot_dmacoherent(prot) \
-       __pgprot_modify(prot, L_PTE_MT_MASK|L_PTE_EXEC, L_PTE_MT_UNCACHED)
+       __pgprot_modify(prot, L_PTE_MT_MASK, L_PTE_MT_UNCACHED|L_PTE_XN)
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