linux-kernel - Re: [GIT PULL] Please pull powerpc/linux.git powerpc-5.18-1 tag

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Date:   Wed, 30 Mar 2022 15:44:58 +0200
From:   Arnd Bergmann <arnd@...db.de>
To:     Michael Ellerman <mpe@...erman.id.au>
Cc:     Michal Suchánek <msuchanek@...e.de>,
        Paul Menzel <pmenzel@...gen.mpg.de>,
        Alexey Kardashevskiy <aik@...abs.ru>, jniethe5@...il.com,
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        Joe Lawrence <joe.lawrence@...hat.com>,
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        Linus Torvalds <torvalds@...ux-foundation.org>,
        Jakob Koschel <jakobkoschel@...il.com>
Subject: Re: [GIT PULL] Please pull powerpc/linux.git powerpc-5.18-1 tag

On Wed, Mar 30, 2022 at 3:21 PM Michael Ellerman <mpe@...erman.id.au> wrote:
> Michal Suchánek <msuchanek@...e.de> writes:
> > On Mon, Mar 28, 2022 at 08:07:13PM +1100, Michael Ellerman wrote:
> >> No you're right, we have moved away from them, but not entirely.
> >>
> >> Functions descriptors are still used for 64-bit big endian, but they're
> >> not used for 64-bit little endian, or 32-bit.
> >
> > There was a patch to use ABIv2 for ppc64 big endian. I suppose that
> > would rid usof the gunction descriptors for good.
>
> It would be nice.
>
> The hesitation in the past was that the GNU toolchain developers don't
> officially support BE+ELFv2, though it is in use so it does work.

It clearly made sense to wait while BE+ELFv1 was commonly used and
well tested, but as that is getting less common each year, getting ELFv1
out of the picture would appear to make the setup less obscure, not more.

       Arnd