linux-kernel - Re: [PATCH v5 01/13] powerpc: Remove Xilinx PPC405/PPC440 support

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Date:   Thu, 25 Jun 2020 08:39:12 +0000
From:   Joel Stanley <joel@....id.au>
To:     Michael Ellerman <mpe@...erman.id.au>
Cc:     Nathan Chancellor <natechancellor@...il.com>,
        Arnd Bergmann <arnd@...db.de>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Michal Simek <michal.simek@...inx.com>,
        LKML <linux-kernel@...r.kernel.org>,
        clang-built-linux <clang-built-linux@...glegroups.com>,
        Paul Mackerras <paulus@...ba.org>,
        linuxppc-dev <linuxppc-dev@...ts.ozlabs.org>
Subject: Re: [PATCH v5 01/13] powerpc: Remove Xilinx PPC405/PPC440 support

On Fri, 19 Jun 2020 at 11:02, Michael Ellerman <mpe@...erman.id.au> wrote:
>
> Nathan Chancellor <natechancellor@...il.com> writes:
> >> It's kind of nuts that the zImage points to some arbitrary image
> >> depending on what's configured and the order of things in the Makefile.
> >> But I'm not sure how we make it less nuts without risking breaking
> >> people's existing setups.
> >
> > Hi Michael,
> >
> > For what it's worth, this is squared this away in terms of our CI by
> > just building and booting the uImage directly, rather than implicitly
> > using the zImage:
> >
> > https://github.com/ClangBuiltLinux/continuous-integration/pull/282
> > https://github.com/ClangBuiltLinux/boot-utils/pull/22
>
> Great.
>
> > We were only using the zImage because that is what Joel Stanley intially
> > set us up with when PowerPC 32-bit was added to our CI:
> >
> > https://github.com/ClangBuiltLinux/continuous-integration/pull/100
>
> Ah, so Joel owes us all beers then ;)

Hey, you owe me beers for finding broken machines!

This machine was picked from a vague discussion on an internal chat.
The two requirements were that it would build, and boot in qemu.

If there's a better supported 32 bit machine then we should switch the
CI over. We don't want the Clang CI to be the only user and give the
false impression that someone out there is still booting upstream
kernels on it.

> > Admittedly, we really do not have many PowerPC experts in our
> > organization so we are supporting it on a "best effort" basis, which
> > often involves using whatever knowledge is floating around or can be
> > gained from interactions such as this :) so thank you for that!
>
> No worries. I definitely don't expect you folks to invest much effort in
> powerpc, especially the old 32-bit stuff, so always happy to help debug
> things, and really appreciate the testing you do.

+1

Cheers,

Joel