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.
r~
