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

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Message-ID: <9d451a24ed4c6348ea3fbea732644d15@kernel.org>
Date:   Wed, 20 Jan 2021 13:54:57 +0000
From:   Marc Zyngier <maz@...nel.org>
To:     Will Deacon <will@...nel.org>
Cc:     Andre Przywara <andre.przywara@....com>,
        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 2021-01-20 13:49, Will Deacon wrote:
> On Wed, Jan 20, 2021 at 01:45:24PM +0000, Andre Przywara wrote:
>> 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.
> 
> for-next/rng is a stable branch, so anybody who wants the first patch 
> can
> just pull it (without anything I queue on top).

OK. I'll pull that branch and stash the KVM stuff on top.

Thanks,

         M.
-- 
Jazz is not dead. It just smells funny...