Re: [RFC PATCH v4 3/4] Adding Andes AX25 and A25 CPU model

[Alistair Francis]

On Fri, Aug 6, 2021 at 7:51 PM Bin Meng <bmeng.cn@gmail.com> wrote:
>
> On Fri, Aug 6, 2021 at 2:12 PM Ruinland Chuan-Tzu Tsa(蔡傳資)
> <ruinland@andestech.com> wrote:
> >
> > Hi Bin and Alistair,
> >
> > >> Adding Andes AX25 and A25 CPU model into cpu.h and cpu.c without
> >
> > > The latest RISC-V core from Andes is AX45 and A45. Should we just
> > > support the latest one?
> >
> > Maybe we can have them all ?
> > AX25 and A25 is still in production, and we still have new clients using 
> > these CPU models.
> >
>
> Does AX25 and AX45 have any significant difference?

My hope is that the way the custom CSRs are implemented means that the
Andes CPUs can be self contained. That way QEMU can support whatever
Andes upstreams and it shouldn't add a maintenance burden on anyone
else.

Starting with a AX25 is fine with me. Whatever Andes is willing to
upstream, maintain and test works for me.

Alistair

>
> Regards,
> Bin
>