Re: [PATCH v2 00/10] arm64: tegra: Prevent early SMMU faults

From: Will Deacon <will@kernel.org>
To: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Cc: Joerg Roedel <joro@8bytes.org>,
	iommu@lists.linux-foundation.org,
	Jon Hunter <jonathanh@nvidia.com>,
	Thierry Reding <thierry.reding@gmail.com>,
	Nicolin Chen <nicolinc@nvidia.com>,
	linux-tegra@vger.kernel.org, Robin Murphy <robin.murphy@arm.com>,
	linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v2 00/10] arm64: tegra: Prevent early SMMU faults
Date: Wed, 2 Jun 2021 12:40:49 +0100	[thread overview]
Message-ID: <20210602114049.GF30593@willie-the-truck> (raw)
In-Reply-To: <e2341ca1-7b6d-cc19-8c43-1ada0b1f5601@canonical.com>

On Wed, Jun 02, 2021 at 12:44:58PM +0200, Krzysztof Kozlowski wrote:
> On 02/06/2021 10:52, Thierry Reding wrote:
> > On Wed, Jun 02, 2021 at 09:35:13AM +0200, Krzysztof Kozlowski wrote:
> >> On 02/06/2021 09:33, Krzysztof Kozlowski wrote:
> >>> On 01/06/2021 20:08, Thierry Reding wrote:
> >>>> On Tue, Jun 01, 2021 at 01:26:46PM +0100, Will Deacon wrote:
> >>>>> On Fri, May 28, 2021 at 07:05:28PM +0200, Thierry Reding wrote:
> >>>>>> On Tue, Apr 20, 2021 at 07:26:09PM +0200, Thierry Reding wrote:
> >>>>>>> From: Thierry Reding <treding@nvidia.com>
> >>>>>>>
> >>>>> Probably best if I queue 3-6 on a separate branch once you send a v3,
> >>>>> then Krzysztof can pull that in if he needs it.
> >>>>
> >>>> Patch 5 has a build-time dependency on patch 1, so they need to go in
> >>>> together. The reason why I suggested Krzysztof pick these up is because
> >>>> there is a restructuring series that this depends on, which will go into
> >>>> Krzysztof's tree. So in order to pull in 3-6, you'd get a bunch of other
> >>>> and mostly unrelated stuff as well.
> >>>
> >>> I missed that part... what other series are needed for this one? Except
> >>> Dmitry's power management set I do not have anything in my sight for
> >>> Tegras memory controllers.
> >>>
> >>> Anyway, I can take the memory bits and provide a stable tag with these.
> >>> Recently there was quite a lot work around Tegra memory controllers, so
> >>> this makes especially sense if new patches appear.
> >>
> >> OK, I think I have now the patchset you talked about - "memory: tegra:
> >> Driver unification" v2, right?
> > 
> > Yes, that's the one. That series is fairly self-contained, but Dmitry's
> > power management set has dependencies that pull in the regulator, clock
> > and ARM SoC trees.
> > 
> > I did a test merge of the driver unification series with a branch that
> > has Dmitry's patches and all the dependencies and there are no conflicts
> > so that, fortunately, doesn't further complicates things.
> > 
> > Do you want me to send you a pull request with Dmitry's memory
> > controller changes? You could then apply the unification series on top,
> > which should allow this SMMU series to apply cleanly on top of that.
> 
> Makes sense and it looks quite bulletproof for future changes. Let's do
> like this. I will apply your patch 1/10 from this v2 on top of it and
> driver unification later.

Okey doke. Thierry -- please let me know which patches I can queue. Having
the SMMU driver changes in the IOMMU tree really helps in case of conflicts
with other SMMU changes. As I say, I can put stuff on a separate branch for
you if it helps.

Will

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