Re: [PATCH v4 03/20] iommu/tegra: gart: Ignore devices without IOMMU phandle in DT

Dmitry Osipenko
2018-09-24T18:41:28Z

On 9/24/18 1:05 PM, Thierry Reding wrote:
> On Mon, Sep 24, 2018 at 03:41:36AM +0300, Dmitry Osipenko wrote:
>> GART can't handle all devices, hence ignore devices that aren't related
>> to GART. IOMMU phandle must be explicitly assign to devices in the device
>> tree.
>
> I think technically the GART can indeed handle all devices since it is
> just a physical address region that can be used to remap other physical
> addresses. That's not to say that doing so would be a good idea. So the
> commit message here is slightly confusing, but other than that the idea
> is good, so:
>
> Acked-by: Thierry Reding <treding@nvidia.com>
>

It shouldn't be able to serve something like SDHCI, though I haven't
tried to verify that.