Re: [Qemu-devel] machines and versions - why so many?

[Marcel Apfelbaum]

On Mon, 2014-06-23 at 23:41 +0200, Andreas Färber wrote:
> Am 23.06.2014 23:35, schrieb Alexey Kardashevskiy:
> > Looks like I must copy PC_COMPAT_X_X as PSERIES_COMPAT_X_X starting 1.6 (or
> > 1.7 - whichever starts supporting migration well enough on pseries) because
> > pretty much of what they do is tweaking PCI devices and we can have all of
> > these devices on pseries. And then keep an eye on what is happening in PC
> > world to copy same tweaks to pseries as they come. Is that correct?
> 
> Please don't. There's a series by Marcel on the list converting those PC
> macros to QOM.

Actually, I think you are referring to is Eduardo's series :)
http://lists.gnu.org/archive/html/qemu-devel/2014-06/msg03155.html

Thanks,
Marcel

>  You already have a QOM sPAPR machine, so you should just
> derive new legacy types as needed and override things there.
> 
> Also, -machine *is* the global mechanism we have to tell QEMU which
> version you want, it's a shorthand for setting a list of global
> properties. Don't forget that QEMU can be used without libvirt, so the
> knowledge of which properties to set for which version is kept in QEMU.
> 
> Cheers,
> Andreas
>