> 2023年4月20日 17:32，Nick Desaulniers <ndesaulniers@xxxxxxxxxx> 写道： > > On Wed, Apr 19, 2023 at 3:15 PM Thomas Bogendoerfer > <tsbogend@xxxxxxxxxxxxxxxx> wrote: >> >> On Wed, Apr 19, 2023 at 02:35:02PM -0700, Nick Desaulniers wrote: >>> 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 >> >> mips32r5 >> >>> - r5500 >> >> mips4 >> >>> - rm5200 >> >> mips4 >> >>> - sb1 >> >> mips64r1 > > Thomas, thanks for reviewing datasheets to verify this. > > Jiaxun, for SB1, you have cc-option fall back to -march=mips4, does > that need to be -march=mips64r1? Yep, my bad, was reading the manual wrong. Will fix in next rev. Thanks. - Jiaxun
