Hi, Richard, On Tue, Sep 21, 2021 at 5:14 AM Richard Henderson <rth@xxxxxxxxxxx> wrote: > > On 9/19/21 7:36 PM, Huacai Chen wrote: > > Hi, Arnd, > > > > On Sun, Sep 19, 2021 at 5:59 PM Arnd Bergmann <arnd@xxxxxxxx> wrote: > >> > >> On Sat, Sep 18, 2021 at 9:12 AM Huacai Chen <chenhuacai@xxxxxxxxx> wrote: > >>> On Sat, Sep 18, 2021 at 5:10 AM Eric W. Biederman <ebiederm@xxxxxxxxxxxx> wrote: > >>>> For example does LoongArch have a version without built in floating > >>>> point support? > >>> > >>> Some of these structures seems need rethinking, But we really have > >>> LoongArch-based MCUs now (no FP, no SMP, and even no MMU). > >> > >> NOMMU Linux is kind-of on the way out as interest is fading, so I hope you > >> don't plan on supporting this in the future. > >> > >> Do you expect to see future products with MMU but no FP or no SMP? > > OK, we will not care no-MMU hardware in Linux, but no-FP and no-SMP > > hardware will be supported. > > Please consider requiring the FP registers to be present even on no-FP hardware. > > With this plus the FP data movement instructions (FMOV, MOVGR2FR, MOVFR2GR, FLD, FST), it > is possible to implement soft-float without requiring a separate soft-float ABI. This can > vastly simplify compatibility and deployment. OK, I'll send an updated version. > > > r~
