在2024年5月15日五月 下午2:43，Maciej W. Rozycki写道： > On Wed, 15 May 2024, Jiaxun Yang wrote: > >> >> MIPS MT ASE is only available on ISA between Release 1 and Release 5. >> > >> > R2+ only actually, as also evident from Kconfig... >> >> Hi Maciej, >> >> Long time no see :-) > > It's not so easy to get rid of me. ;) > >> There is nothing stopping us to run R1 kernel on R2 hardware, given that >> those features are all detected at boot time. I understand MT was introduced >> at 34K which is R2. > > We can certainly choose to support R2 features at run time with R1 kernel > configurations, but it's not what the change description says (left quoted > above for reference). And the MT ASE, indeed first implemented with the > 34K (for which I was a member of the product development team back at MIPS > UK), is not a part of the R1 ISA specification set. > Good to know! The motivation behind this patch is to workaround some randconfig failures that combines MT with early ISA release. They are not trivial to fix, so I just ban them in Kconfig. I was a little bit reluctant to admit that in commit message. Anyway, thanks for bringing that up. -- - Jiaxun
