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

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Message-ID: <20180924100525.GE21032@ulmo>
Date:   Mon, 24 Sep 2018 12:05:25 +0200
From:   Thierry Reding <thierry.reding@...il.com>
To:     Dmitry Osipenko <digetx@...il.com>
Cc:     Jonathan Hunter <jonathanh@...dia.com>,
        Joerg Roedel <joro@...tes.org>,
        Rob Herring <robh+dt@...nel.org>,
        Robin Murphy <robin.murphy@....com>,
        iommu@...ts.linux-foundation.org, devicetree@...r.kernel.org,
        linux-tegra@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 03/20] iommu/tegra: gart: Ignore devices without IOMMU
 phandle in DT

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@...dia.com>

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