Re: [PATCH 0/3] iommu/arm-smmu: Qualcomm bootsplash/efifb

From: Lee Jones <lee.jones@linaro.org>
To: Will Deacon <will@kernel.org>
Cc: Patrick Daly <pdaly@codeaurora.org>,
	linux-arm-msm <linux-arm-msm@vger.kernel.org>,
	open list <linux-kernel@vger.kernel.org>,
	iommu@lists.linux-foundation.org,
	Thierry Reding <treding@nvidia.com>,
	Robin Murphy <robin.murphy@arm.com>,
	linux-arm-kernel <linux-arm-kernel@lists.infradead.org>,
	Pratik Patel <pratikp@codeaurora.org>
Subject: Re: [PATCH 0/3] iommu/arm-smmu: Qualcomm bootsplash/efifb
Date: Mon, 24 May 2021 13:03:39 +0100	[thread overview]
Message-ID: <CAF2Aj3iKk2LSA5XC76pNiLV8a76BkibUitof-dix8rqkc0qiow@mail.gmail.com> (raw)
In-Reply-To: <20200108091641.GA15147@willie-the-truck>

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On Wed, 8 Jan 2020 at 09:16, Will Deacon <will@kernel.org> wrote:

> On Thu, Dec 26, 2019 at 02:17:06PM -0800, Bjorn Andersson wrote:
> > These patches implements the stream mapping inheritance that's necessary
> in
> > order to not hit a security violation as the display hardware looses its
> stream
> > mapping during initialization of arm-smmu in various Qualcomm platforms.
> >
> > This was previously posted as an RFC [1], changes since then involves the
> > rebase and migration of the read-back code to the Qualcomm specific
> > implementation, the mapping is maintained indefinitely - to handle probe
> > deferring clients - and rewritten commit messages.
>
> I don't think we should solve this in a Qualcomm-specific manner. Please
> can
> you take a look at the proposal from Thierry [1] and see whether or not it
> works for you?
>

Did this or Thierry's solution ever gain traction?

Or are all the parties still 'solving' this downstream?

> Thanks,
>
> Will
>
> [1]
> https://lore.kernel.org/lkml/20191209150748.2471814-1-thierry.reding@gmail.com
>

-- 
Lee Jones [李琼斯]
Linaro Services Senior Technical Lead
Linaro.org │ Open source software for ARM SoCs
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