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Date:   Sat, 27 Feb 2021 23:59:40 +0100
From:   "Jason A. Donenfeld" <>
To:     "Maciej W. Rozycki" <>
Cc:     LKML <>,
        "open list:BROADCOM NVRAM DRIVER" <>,
        Thomas Bogendoerfer <>,
        Ralf Baechle <>,
        George Cherian <>,
        Huacai Chen <>,
        Jiaxun Yang <>
Subject: Re: [PATCH] MIPS: select CPU_MIPS64 for remaining MIPS64 CPUs

On Sat, Feb 27, 2021 at 2:41 PM Maciej W. Rozycki <> wrote:
> On Sat, 27 Feb 2021, Jason A. Donenfeld wrote:
> > The CPU_MIPS64 and CPU_MIPS32 variables are supposed to be able to
> > distinguish broadly between 64-bit and 32-bit MIPS CPUs. However, they
>  That is not true.  The purpose of these options is to identify MIPS64 and
> MIPS32 ISA processors respectively (and the generic features these ISAs
> imply).  There are 64-bit and 32-bit MIPS processors which do not qualify,
> specifically all MIPS I, MIPS II, MIPS III, and MIPS IV implementations.
> > weren't selected by the specialty CPUs, Octeon and Loongson, which meant
> > it was possible to hit a weird state of:
> >
> >     MIPS=y, CONFIG_64BIT=y, CPU_MIPS64=n
>  This is a correct combination for MIPS III and MIPS IV processors.
> > This commit rectifies the issue by having CPU_MIPS64 be selected when
> > the missing Octeon or Loongson models are selected.
>  From the description and/or other options selected by CPU_LOONGSON64 and
> CPU_CAVIUM_OCTEON I infer the change itself is correct, so you only need
> to rewrite the change description.

Indeed you're right. v2 on its way.


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