Re: [PATCH for-7.1 3/4] target/loongarch: rename the TCG CPU "la464" to "qemu64-v1.00"

[gaosong]

在 2022/8/17 上午10:36, chen huacai 写道:
> Hi, Richard and Xuerui,
>
> On Mon, Aug 15, 2022 at 4:54 AM Richard Henderson
> <richard.henderson@linaro.org> wrote:
> > On 8/14/22 09:55, WANG Xuerui wrote:
> > > From: WANG Xuerui <git@xen0n.name>
> > >
> > > The only LoongArch CPU implemented is modeled after the Loongson 3A5000,
> > > but it is not the real thing, ...
> > The 3A5000 is the SoC, as far as I could find, and the documentation of that 
> > says the core
> > is named the la464.
> >
> >
> > > In general, high-fidelity models can and should be named after the real
> > > hardware model, while generic emulation-oriented models should be named
> > > after ISA levels.
> > This wasn't intended to be a generic emulation model, as far as I know.  There 
> > are missing
> > features, but presumably those would eventually be filled in.
> >
> >
> > > For now, the best reference for LoongArch ISA levels
> > > is the revision number of the LoongArch ISA Manual, of which v1.00 is
> > > still the latest. (v1.01 and v1.02 are minor revisions without
> > > substantive change.)
> > >
> > > As defined by various specs, the vendor and model names are also
> > > reflected in respective CSRs, and are 8 bytes long. So, rename "la464"
> > > to "qemu64-v1.00", with "QEMU64" as vendor name and "v1.00" as model
> > > name.
> > Eh, I suppose.  I'm not really keen on this though, as I would presume there 
> > will be
> > eventual forward progress on completing the real cpu model.  We simply won't 
> > give any
> > compatibility guarantees for loongarch until we are ready to do so.
> In my opinion, real cpu name (Loongson-3A5000, Loongson-3A6000, etc.)
> and generic qemu emulated name (qemu64-v1.00, qemu64-v2.00, vx.xx is
> the ISA level, I found this style is used for x86) are both
> acceptable. But la464 is not a good cpu name, because la264 and la464
> are in the same ISA level, while la664 will be in a new level.
I think that 'la264' , 'la464' and 'la664'  are  cpu core name. used 
them as cpu type is more suitable.
Although la264 and la464 are in the same ISA level,   but the features 
should be different.

Thanks.
Song Gao
> Huacai
>
> > r~