Re: [Qemu-devel] [libvirt] Modern CPU models cannot be used with libvirt

[Anthony Liguori]

On 03/25/2012 08:08 AM, Avi Kivity wrote:
> On 03/25/2012 02:55 PM, Anthony Liguori wrote:
> > > If cpu models are not part of configuration they should not be affected
> > > by configuration mechanism. You are just avoiding addressing the real
> > > question that if asked above.
> >
> >
> > I think you're just refusing to listen.
> >
> > The stated direction of QEMU, for literally years now, is that we want
> > to arrive at the following:
> >
> > QEMU is composed of a series of objects who's relationships can be
> > fully described by an external configuration file.  Much of the
> > current baked in concepts (like machines) would then become
> > configuration files.
> >
> > qemu -M pc
> >
> > Would effectively be short hand for -readconfig
> > /usr/share/qemu/machines/pc.cfg
>
> In that case
>
>   qemu -cpu westmere
>
> is shorthand for -readconfig /usr/share/qemu/cpus/westmere.cfg.

This is not a bad suggestion, although it would make -cpu ? a bit awkward.  Do 
you see an advantage to this over having /usr/share/qemu/target-x86_64-cpus.cfg 
that's read early on?

> > I think the thread has reduced to: should /usr/share configuration
> > files be read by default or just treated as additional configuration
> > files.
>
> If they're read as soon as they're referenced, what's the difference?

I suspect libvirt would not be happy with reading configuration files on 
demand..

Regards,

Anthony Liguori