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Date:   Fri, 27 Jul 2018 16:20:01 +0200
From:   Joerg Roedel <joro@8bytes.org>
To:     Dmitry Osipenko <digetx@gmail.com>
Cc:     Will Deacon <will.deacon@arm.com>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        "Rafael J. Wysocki" <rafael@kernel.org>,
        Thierry Reding <thierry.reding@gmail.com>,
        Jonathan Hunter <jonathanh@nvidia.com>,
        Mikko Perttunen <cyndis@kapsi.fi>,
        Rob Herring <robh+dt@kernel.org>,
        Frank Rowand <frowand.list@gmail.com>,
        Ben Skeggs <bskeggs@redhat.com>,
        Russell King <linux@armlinux.org.uk>,
        Catalin Marinas <catalin.marinas@arm.com>,
        Nicolas Chauvet <kwizart@gmail.com>,
        devicetree@vger.kernel.org, nouveau@lists.freedesktop.org,
        iommu@lists.linux-foundation.org, dri-devel@lists.freedesktop.org,
        linux-tegra@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [RFC PATCH v1 0/6] Resolve unwanted DMA backing with IOMMU
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On Fri, Jul 27, 2018 at 05:10:22PM +0300, Dmitry Osipenko wrote:
> I'm not sure what you guys are meaning by the "firmware", could you elaborate 
> please? Do you mean the Open Firmware and hence the devicetree or what?

Yes, I think the best way to request this is using a device-tree
property. Letting the device driver request it is definitly a bad idea.


	Joerg