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Re: [libvirt] [PATCH] cpu_ppc64: Add support for host-model on POWER9



On Fri, 2017-06-09 at 01:06 +1000, David Gibson wrote:
> > power9 compatibility mode, which AFAICT is simply not
> > defined at all in QEMU.
> 
> Umm.. what?  It's right there in target/ppc/compat.c.  Or are you
> looking at downstream - maybe it hasn't been backported yet.

[...]
> > One more issue I've noticed:
> > 
> >   $ /usr/libexec/qemu-kvm \
> >     -nodefaults \
> >     -M pseries,accel=kvm \
> >     -cpu POWER9
> >   qemu-kvm: Unable to find sPAPR CPU Core definition
> > 
> > Since the recommended configuration for POWER8 guests is
> > to use
> > 
> >   <cpu mode='custom'>
> >     <model>POWER8</model>
> >   </cpu>
> > 
> > I would expect the above command line to work so that
> > POWER9 guests can be configured in a similar manner. That
> > seems bug-worthy to me, should I go ahead and file it?
> 
> Uh, yeah.  Again, I'm pretty sure that's already working upstream.

Yeah, I've been looking at downstream. I'll try again with
upstream and file bugs as needed.

-- 
Andrea Bolognani / Red Hat / Virtualization


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