Re: [Qemu-devel] [RFC untested PATCH] i386/cpu: make -cpu host support monitor/mwait

[Igor Mammedov <imammedo@redhat.com>]

On Tue, 12 Jun 2018 11:49:22 -0300
Eduardo Habkost <ehabkost@redhat.com> wrote:

> On Tue, Jun 12, 2018 at 03:58:03PM +0200, Igor Mammedov wrote:
> [...]
> > > > > +    if (xcc->host_cpuid_required && enable_cpu_pm) {
> > > > > +        host_cpuid(5, 0, &cpu->mwait.eax, &cpu->mwait.ebx,
> > > > > +                   &cpu->mwait.ecx, &cpu->mwait.edx);
> > > > > +    }    
[...]
> > > > also max_x86_cpu_initfn() might be better place for filling it up.  
> 
> Why?
I've missed 'enable_cpu_pm' which is probably a property,
so yep it can't go into initfn.

However if we not going to migrate this state or use outside of
cpu_x86_cpuid(), I don't see why we should add it to X86CPU state
and keep around.
We can query it on demand from cpu_x86_cpuid() like we do for
PMU leaf.