Re: [PATCH v2 6/7] MIPS: Fallback CPU -march CFLAG to ISA level if unsupported

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On Wed, Apr 19, 2023 at 9:50 AM Jiaxun Yang <jiaxun.yang@xxxxxxxxxxx> wrote:
>
>
>
> > 2023年4月18日 21:07,Nick Desaulniers <ndesaulniers@xxxxxxxxxx> 写道:
> >
> > On Fri, Apr 14, 2023 at 1:07 AM Jiaxun Yang <jiaxun.yang@xxxxxxxxxxx> wrote:
> >>
> >> LLVM does not implement some of -march options. However those options
> >> are not mandatory for kernel to build for those CPUs.
> >>
> >> Fallback -march CFLAG to ISA level if unsupported by toolchain so
> >> we can get those kernel to build with LLVM.
> >>
> >> Link: https://github.com/ClangBuiltLinux/linux/issues/1544
> >> Reported-by: Nathan Chancellor <nathan@xxxxxxxxxx>
> >> Signed-off-by: Jiaxun Yang <jiaxun.yang@xxxxxxxxxxx>
> >
> > Thanks for the patch! Maybe it's more obvious to folks who work on
> > mips, but how did you determine that say `p5600` is `mips32r5` or
> > `r10000` is `mips4`?
>
> Wikipedia [1] should fit the purpose.
>
> [1]: https://en.wikipedia.org/wiki/List_of_MIPS_architecture_processors

Mostly! Though I was not able to verify:
- p5600
- r5500
- rm5200
- sb1
- loongson*

The rest LGTM, but maybe these families are better understood by Thomas?
-- 
Thanks,
~Nick Desaulniers




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