linux-kernel - Re: [PATCH v6 0/5] ARM: arm64: Add SMCCC TRNG entropy service

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Message-ID: <20210120134524.0c47139a@slackpad.fritz.box>
Date:   Wed, 20 Jan 2021 13:45:24 +0000
From:   Andre Przywara <andre.przywara@....com>
To:     Marc Zyngier <maz@...nel.org>
Cc:     Will Deacon <will@...nel.org>,
        Russell King <linux@...linux.org.uk>,
        Catalin Marinas <catalin.marinas@....com>,
        Ard Biesheuvel <ardb@...nel.org>, kernel-team@...roid.com,
        Theodore Ts'o <tytso@....edu>, Mark Brown <broonie@...nel.org>,
        Sudeep Holla <sudeep.holla@....com>,
        linux-kernel@...r.kernel.org,
        Linus Walleij <linus.walleij@...aro.org>,
        kvmarm@...ts.cs.columbia.edu,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v6 0/5] ARM: arm64: Add SMCCC TRNG entropy service

On Wed, 20 Jan 2021 13:26:26 +0000
Marc Zyngier <maz@...nel.org> wrote:

Hi,

> On 2021-01-20 13:01, Will Deacon wrote:
> > On Wed, 6 Jan 2021 10:34:48 +0000, Andre Przywara wrote:  
> >> a fix to v5, now *really* fixing the wrong priority of SMCCC vs.
> >> RNDR in arch_get_random_seed_long_early(). Apologies for messing
> >> this up in v5 and thanks to broonie for being on the watch!
> >> 
> >> Will, Catalin: it would be much appreciated if you could consider 
> >> taking
> >> patch 1/5. This contains the common definitions, and is a
> >> prerequisite for every other patch, although they are somewhat
> >> independent and likely
> >> will need to go through different subsystems.
> >> 
> >> [...]  
> > 
> > Applied the first patch only to arm64 (for-next/rng), thanks!
> > 
> > [1/5] firmware: smccc: Add SMCCC TRNG function call IDs
> >       https://git.kernel.org/arm64/c/67c6bb56b649  
> 
> I can't see how the rest of the patches can go via any other tree
> if all the definitions are in the first one.
> 
> Andre, can you explain what your plan is?

Well, I don't really have a great solution for that, other than hoping
that 1/5 makes it into Linus' master at some point.

I see that it's a stretch, but pulling 1/5 into 5.11 now would
prepare the stage for the others to go via any tree, into 5.12-rc1?

Or you could maybe take both 1/5 and 5/5 into your kvm-arm tree, and
would hope that a git rebase later would sort this out for you?

But I think you are much more experienced in those kind of issues, so
happy to hear about any other solutions.

Thanks,
Andre