netdev - Re: [Freedreno] [PATCH 16/17] iommu: remove DOMAIN_ATTR_IO_PGTABLE

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Message-ID: <20210310085806.GB5928@lst.de>
Date:   Wed, 10 Mar 2021 09:58:06 +0100
From:   Christoph Hellwig <hch@....de>
To:     Will Deacon <will@...nel.org>
Cc:     Rob Clark <robdclark@...il.com>,
        Robin Murphy <robin.murphy@....com>,
        Christoph Hellwig <hch@....de>, Joerg Roedel <joro@...tes.org>,
        Li Yang <leoyang.li@....com>, kvm@...r.kernel.org,
        Michael Ellerman <mpe@...erman.id.au>,
        linux-arm-msm <linux-arm-msm@...r.kernel.org>,
        linuxppc-dev <linuxppc-dev@...ts.ozlabs.org>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        virtualization@...ts.linux-foundation.org,
        "list@....net:IOMMU DRIVERS <iommu@...ts.linux-foundation.org>, Joerg
        Roedel <joro@...tes.org>," <iommu@...ts.linux-foundation.org>,
        netdev@...r.kernel.org,
        freedreno <freedreno@...ts.freedesktop.org>,
        David Woodhouse <dwmw2@...radead.org>,
        "moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE" 
        <linux-arm-kernel@...ts.infradead.org>,
        Sai Prakash Ranjan <saiprakash.ranjan@...eaurora.org>
Subject: Re: [Freedreno] [PATCH 16/17] iommu: remove
 DOMAIN_ATTR_IO_PGTABLE_CFG

On Fri, Mar 05, 2021 at 10:00:12AM +0000, Will Deacon wrote:
> > But one thing I'm not sure about is whether
> > IO_PGTABLE_QUIRK_ARM_OUTER_WBWA is something that other devices
> > *should* be using as well, but just haven't gotten around to yet.
> 
> The intention is certainly that this would be a place to collate per-domain
> pgtable quirks, so I'd prefer not to tie that to the GPU.

So the overall consensus is to just keep this as-is for now?