[RFC PATCH] docs/system/deprecated: mark ppc64abi32-linux-user for deprecation

[Peter Maydell]

On Fri, 4 Sep 2020 at 17:52, Alex Bennée <alex.bennee at linaro.org> wrote:
>
> It's buggy and we are not sure anyone uses it.

> +``ppc64abi32`` CPUs (since 5.2.0)
> +'''''''''''''''''''''''''''''''''
> +
> +The ``ppc64abi32`` architecture has a number of issues which regularly
> +trip up our CI testing and is suspected to be quite broken.
> +Furthermore the maintainers are unsure what the correct behaviour
> +should be and strongly suspect no one actually uses it.

IRC discussion suggests we do know what the correct behaviour
is -- it should be "what the compat32 interface of a 64-bit
PPC kernel gives you", it's just that the code doesn't do that
(and never has?). It's like the mipsn32, mipsn32el, sparc32plus
ABIs which we also implement (hopefully correctly...)

But "this has always been broken and nobody complained" is
a good reason to deprecate anyway.

thanks
-- PMM