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Re: [Xen-devel] [PATCH v3 05/13] xen/iommu: arm: Remove temporary the SMMU driver

Hi Ian,

On 20/02/15 12:18, Ian Campbell wrote:
> On Fri, 2015-01-30 at 18:49 +0000, Julien Grall wrote:
>> The current SMMU driver has completly diverged. That makes me hard to
>> maintain.
> Will this temporarily regress anything in a noticeable way? I think
> it'll just potentially make some hypothetical platform switch back to
> 1:1 dom0 mode, which in practice they all use anyway, IOW no harm done,
> even temporarily. So:

We still have to keep the 1:1 DOM0 mapping with SMMU. It's because we
don't know if all devices are protected.

The only possible regression is the SMMU node won't be remove from DOM0
and threfore may be used by Linux. Aside that there is no different for
the user.

>> Signed-off-by: Julien Grall <julien.grall@xxxxxxxxxx>
>> Acked-by: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
> Acked-by: Ian Campbell <ian.campbell@xxxxxxxxxx>


Julien Grall

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