Re: What is the purpose for "none" machine?

[Matwey V. Kornilov]

пн, 23 янв. 2023 г. в 21:02, Peter Maydell <peter.maydell@linaro.org>:
>
> On Mon, 23 Jan 2023 at 17:36, Matwey V. Kornilov
> <matwey.kornilov@gmail.com> wrote:
> > I am playing with qemu-system-avr currently.
> > I see that there is an "empty machine" called "none" in
> >
> >      qemu-system-avr -M help
> >
> > list.
> >
> > Is it a real thing? I am failed to run any code with "none" machine.
>
> It is mostly for the benefit of management layer code (eg libvirt)
> that wants to probe capabilities of QEMU[*], and secondarily used
> in some of QEMU's own test suite.  The 'none' machine has no CPU,
> no devices and no RAM, which is why you can't run any code on it.

Thanks for the explanation. Is there a way to manually add CPU, RAM
and other devices in the command line if 'none' is used?

> [*] Management code can execute QEMU with the 'none' machine type,
> telling QEMU not to actually run the guest on startup, and query
> things via the QMP monitor protocol interface, for instance.
>
> thanks
> -- PMM



-- 
With best regards,
Matwey V. Kornilov