linux-kernel - Re: [PATCHv4 1/6] iommu/io-pgtable-arm: Add support to use system cache

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Message-ID: <20200921180318.GG3141@willie-the-truck>
Date:   Mon, 21 Sep 2020 19:03:19 +0100
From:   Will Deacon <will@...nel.org>
To:     Sai Prakash Ranjan <saiprakash.ranjan@...eaurora.org>
Cc:     Robin Murphy <robin.murphy@....com>,
        Joerg Roedel <joro@...tes.org>,
        Jordan Crouse <jcrouse@...eaurora.org>,
        Rob Clark <robdclark@...il.com>,
        iommu@...ts.linux-foundation.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Akhil P Oommen <akhilpo@...eaurora.org>,
        freedreno@...ts.freedesktop.org,
        "Kristian H . Kristensen" <hoegsberg@...gle.com>,
        dri-devel@...ts.freedesktop.org
Subject: Re: [PATCHv4 1/6] iommu/io-pgtable-arm: Add support to use system
 cache

On Fri, Sep 11, 2020 at 07:57:18PM +0530, Sai Prakash Ranjan wrote:
> Add a quirk IO_PGTABLE_QUIRK_SYS_CACHE to override the
> attributes set in TCR for the page table walker when
> using system cache.

I wonder if the panfrost folks can reuse this for the issue discussed
over at:

https://lore.kernel.org/r/cover.1600213517.git.robin.murphy@arm.com

However, Sai, your email setup went wrong when you posted this so you
probably need to repost now that you have that fixed.

Will