linux-kernel - Re: [PATCH v5 3/5] iommu/io-pgtable: Add DART subpage protection support

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Date:   Fri, 16 Sep 2022 06:57:26 -0500
From:   Rob Herring <robh@...nel.org>
To:     Janne Grunau <j@...nau.net>
Cc:     iommu@...ts.linux.dev,
        Konrad Dybcio <konrad.dybcio@...ainline.org>,
        asahi@...ts.linux.dev, Sven Peter <sven@...npeter.dev>,
        Alyssa Rosenzweig <alyssa@...enzweig.io>,
        Hector Martin <marcan@...can.st>,
        Joerg Roedel <joro@...tes.org>, Will Deacon <will@...nel.org>,
        Linux IOMMU <iommu@...ts.linux-foundation.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v5 3/5] iommu/io-pgtable: Add DART subpage protection support

On Fri, Sep 16, 2022 at 4:43 AM Janne Grunau <j@...nau.net> wrote:
>
> From: Sven Peter <sven@...npeter.dev>
>
> DART allows to only expose a subpage to the device. While this is an
> optional feature on the M1 DARTs the new ones present on the Pro/Max
> models require this field in every PTE.
>
> Signed-off-by: Sven Peter <sven@...npeter.dev>
> Signed-off-by: Janne Grunau <j@...nau.net>
>
> ---
>
> (no changes since v3)
>
> Changes in v3:
> - apply change to io-pgtable-dart.c
>
>  drivers/iommu/io-pgtable-dart.c | 8 ++++++++
>  1 file changed, 8 insertions(+)

Reviewed-by: Rob Herring <robh@...nel.org>