[libvirt] [RFC] qemu: Redesigning guest CPU configuration

[Daniel P. Berrange]

On Fri, Jun 19, 2015 at 04:36:34PM +0200, Jiri Denemark wrote:
> On Thu, Jun 18, 2015 at 14:41:17 +0100, Daniel P. Berrange wrote:
> > > So either we need to define all existing CPU models in all their
> > > variants used for various machine types and have a mapping between
> > > (model without a version, machine type) to a specific version of the
> > > model (which may be quite hard) or we need to be able to distinguish
> > > between an existing domain and a new domain with no CPU model version.
> > > While host-model and host-passthrough CPU modes are easy because they
> > > are designed to change everytime a domain starts (which means we don't
> > > need to be able to distinguish between existing and new domains), custom
> > > CPU mode are tricky. Currently, the only at least a bit reasonable thing
> > > which came to my mind is to have a new CPU mode, but it still seems
> > > awkward so please share your ideas if you have any.
> > 
> > Introducing a new CPU mode feels pretty unpleasant to me.
> > 
> > Although it will certainly be tedious work, getting details of all the
> > CPU variants for historical machine types should be doable I think.
> 
> Yeah, I also prefer this variant but I was kind of hoping someone would
> come up with a bright idea which would safe me from all the work :-P

Allow me to introduce you to perl and regexes :-P

Regards,
Daniel
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