linux-kernel - Re: [PATCH v2 0/8] Host1x context isolation support

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Date:   Fri, 17 Dec 2021 11:16:09 +0000
From:   Jon Hunter <jonathanh@...dia.com>
To:     Robin Murphy <robin.murphy@....com>,
        Mikko Perttunen <cyndis@...si.fi>,
        Mikko Perttunen <mperttunen@...dia.com>,
        thierry.reding@...il.com, joro@...tes.org, will@...nel.org,
        robh+dt@...nel.org
Cc:     linux-tegra@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v2 0/8] Host1x context isolation support


On 14/12/2021 15:38, Robin Murphy wrote:

...

>> IOMMU/DT folks, any thoughts about this approach? The patches that are 
>> of interest outside of Host1x/TegraDRM specifics are patches 1, 2, 4, 
>> and 5.
> 
> FWIW it looks fairly innocuous to me. I don't understand host1x - 
> neither hardware nor driver abstractions - well enough to meaningfully 
> review it all (e.g. maybe it's deliberate that the bus .dma_configure 
> method isn't used?), but the SMMU patch seems fine given the Kconfig 
> solution to avoid module linkage problems.


Thanks Robin! Will, Joerg, is OK with you?

Mikko, I believe we are missing a dt-binding change to document the 
'memory-contexts' node which I assume you will add if everyone is OK 
with this?

Cheers
Jon

-- 
nvpublic