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Date: Mon, 07 Jul 2014 15:29:10 +0200
From: Eric Auger <eric.auger@linaro.org>
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Subject: Re: [Qemu-devel] [RFC v4 08/13] hw/vfio/common: Add EXEC_FLAG to
	VFIO DMA mappings
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To: Alvise Rigo <a.rigo@virtualopensystems.com>, Will Deacon <will.deacon@arm.com>
Cc: "peter.maydell@linaro.org" <peter.maydell@linaro.org>, "kim.phillips@freescale.com" <kim.phillips@freescale.com>, "eric.auger@st.com" <eric.auger@st.com>, "patches@linaro.org" <patches@linaro.org>, "qemu-devel@nongnu.org" <qemu-devel@nongnu.org>, "agraf@suse.de" <agraf@suse.de>, "Bharat.Bhushan@freescale.com" <Bharat.Bhushan@freescale.com>, "alex.williamson@redhat.com" <alex.williamson@redhat.com>, "stuart.yoder@freescale.com" <stuart.yoder@freescale.com>, "a.motakis@virtualopensystems.com" <a.motakis@virtualopensystems.com>, "kvmarm@lists.cs.columbia.edu" <kvmarm@lists.cs.columbia.edu>, "christoffer.dall@linaro.org" <christoffer.dall@linaro.org>

On 07/07/2014 03:25 PM, Alvise Rigo wrote:
> Il 07/07/2014 14:49, Will Deacon ha scritto:
>> On Mon, Jul 07, 2014 at 01:27:18PM +0100, Eric Auger wrote:
>>> From: Alvise Rigo <a.rigo@virtualopensystems.com>
>>>
>>> The flag is mandatory for the ARM SMMU so we always add it if the MMIO
>>> handles it.
>>
>> I though the logic of this flag was changing (so that you request an NX
>> mapping instead), so I'd hold off on this change until the kernel has
>> decided what it's doing.
> 
> Yes, you are right.
> This patch is not needed anymore, in fact it was dropped in my last
> patch series.
> It should not be here, please ignore it.

OK. My apologies.

Best Regards

Eric

> 
> Regards,
> alvise
> 
>>
>> Also, the ARM SMMU doesn't mandate any flags, you probably need this as
>> a result of using a PL330, which is an odd case of a DMA master that
>> spits out EXEC transactions (instruction fetch).
>>
>> Will
>>