linux-kernel - Re: [PATCH v4 0/7] firmware: smccc: Add basic SMCCC v1.2 + ARCH_SOC

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Message-ID: <20200521070629.GB1131@bogus>
Date:   Thu, 21 May 2020 08:07:12 +0100
From:   Sudeep Holla <sudeep.holla@....com>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     Will Deacon <will@...nel.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        Catalin Marinas <catalin.marinas@....com>,
        Mark Rutland <mark.rutland@....com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Steven Price <steven.price@....com>, harb@...erecomputing.com,
        Sudeep Holla <sudeep.holla@....com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v4 0/7] firmware: smccc: Add basic SMCCC v1.2 +
 ARCH_SOC_ID support

On Wed, May 20, 2020 at 11:54:16PM +0200, Arnd Bergmann wrote:
> On Wed, May 20, 2020 at 11:29 PM Will Deacon <will@...nel.org> wrote:
> >
> > On Mon, 18 May 2020 10:12:15 +0100, Sudeep Holla wrote:
> > > This patch series adds support for SMCCCv1.2 ARCH_SOC_ID.
> > > This doesn't add other changes added in SMCCC v1.2 yet. They will
> > > follow these soon along with its first user SPCI/PSA-FF.
> > >
> > > This is tested using upstream TF-A + the patch[3] fixing the original
> > > implementation there.
> > >
> > > [...]
> >
> > Applied to arm64 (for-next/smccc), thanks!
> >
> > [1/7] firmware: smccc: Add HAVE_ARM_SMCCC_DISCOVERY to identify SMCCC v1.1 and above
> >       https://git.kernel.org/arm64/c/e5bfb21d98b6
> > [2/7] firmware: smccc: Update link to latest SMCCC specification
> >       https://git.kernel.org/arm64/c/15c704ab6244
> > [3/7] firmware: smccc: Add the definition for SMCCCv1.2 version/error codes
> >       https://git.kernel.org/arm64/c/0441bfe7f00a
> > [4/7] firmware: smccc: Drop smccc_version enum and use ARM_SMCCC_VERSION_1_x instead
> >       https://git.kernel.org/arm64/c/ad5a57dfe434
> > [5/7] firmware: smccc: Refactor SMCCC specific bits into separate file
> >       https://git.kernel.org/arm64/c/f2ae97062a48
> > [6/7] firmware: smccc: Add function to fetch SMCCC version
> >       https://git.kernel.org/arm64/c/a4fb17465182
> > [7/7] firmware: smccc: Add ARCH_SOC_ID support
> >       https://git.kernel.org/arm64/c/ce6488f0ce09
> >
> > Arnd -- Sudeep's reply to you about the sysfs groups seemed reasonable to me,
> > but please shout if you'd rather I dropped this in order to pursue an
> > alternative approach.
>
> I missed the reply earlier, thanks for pointing me to it again.
>
> I'm not entirely convinced, but don't revert it for now because of that,
> I assume we can find a solution.
>

I liked your idea of making this generic and hardcode values if required
for other drivers. I will take a look at that/

> However, please have a look at the build failure report for patch 5
> and fix it if you can see what went wrong.
>

Any pointers for that failure ? I seem to have missed them. I pushed
branch couple of times to my tree but got build success both times.
Any specific config or compilers ?

--
Regards,
Sudeep