Re: [PATCH v2 11/12] hw/arm/raspi: Deprecate old raspiX machine names

[Peter Maydell]

On Tue, 4 Feb 2025 at 13:40, Philippe Mathieu-Daudé <philmd@linaro.org> wrote:
>
> On 4/2/25 12:13, Peter Maydell wrote:
> > On Tue, 4 Feb 2025 at 09:57, Daniel P. Berrangé <berrange@redhat.com> wrote:
> >> IMHO we can have distinct machines for each model, but
> >> *NOT* have further machines for each RAM size within a
> >> model.
> >
> > Yes, this was what I was intending to suggest. Apologies
> > if I was confusing with what I said the previous time round.
>
> OK, let's see if we understand each other correctly as developer,
> before explaining to users, taking the 4B model as example.
>
> The 4B come in 4 physical variants, depending on the amount of
> DRAM: 1G, 2G, 4G and 8G.
>
> We can not allocate 2G on 32-bit hosts, so to have a reproducible
> guest behavior on 32/64-bit hosts, it makes sense to takes the
> model with 1G of DRAM as default for the 'raspi4b' machine.

At the moment we create the 1GB version on 32-bit hosts and
the 2GB version on 64-bit hosts. I dunno that that's ideal,
but I think it's probably best not to change that at this point.

> If an user specify -m 2G ... 8G, we can adapt the 'board_rev'
> register to expose the corresponding amount of ram. Now, how /
> where to tell the users 1/ the default is 1G, and 2/ they can use
> 2/4/8G?

In the documentation: docs/system/arm/raspi.rst .

-- PMM