linux-kernel - Re: [PATCH v4 0/3] Apple M1 DART IOMMU driver

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Date:   Thu, 15 Jul 2021 08:52:33 +0200
From:   Joerg Roedel <joro@...tes.org>
To:     Arnd Bergmann <arnd@...nel.org>
Cc:     Robin Murphy <robin.murphy@....com>,
        Sven Peter <sven@...npeter.dev>, Will Deacon <will@...nel.org>,
        DTML <devicetree@...r.kernel.org>,
        Hector Martin <marcan@...can.st>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Marc Zyngier <maz@...nel.org>,
        Mohamed Mediouni <mohamed.mediouni@...amail.com>,
        Stan Skowronek <stan@...ellium.com>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        Mark Kettenis <mark.kettenis@...all.nl>,
        "open list:IOMMU DRIVERS" <iommu@...ts.linux-foundation.org>,
        Alexander Graf <graf@...zon.com>,
        Alyssa Rosenzweig <alyssa.rosenzweig@...labora.com>,
        Rob Herring <robh+dt@...nel.org>,
        Rouven Czerwinski <r.czerwinski@...gutronix.de>
Subject: Re: [PATCH v4 0/3] Apple M1 DART IOMMU driver

On Wed, Jul 14, 2021 at 10:51:34PM +0200, Arnd Bergmann wrote:
> The question is how we can best allow one but not the other.

By only allowing to allocate domains of type IDENTITY and DMA, but fail
to allocate UNMANAGED domains.

Regards,

	Joerg