Re: [Qemu-devel] [PATCH v4 1/3] target-i386: KVM: add basic Intel LMCE support

[Haozhong Zhang]

On 06/16/16 12:23, Paolo Bonzini wrote:
> 
> 
> On 16/06/2016 12:16, Haozhong Zhang wrote:
> > > 
> > > > +        has_msr_mcg_ext_ctl = true;
> > > >      }
> > > >  
> > > >      c = cpuid_find_entry(&cpuid_data.cpuid, 0x80000007, 0);
> > > 
> > > Which silicon has LMCE?  We may want to enable the property for some CPU
> > > models.  Apart from this, the patch is pretty much okay.
> >
> > Skylake-EX
> 
> ... However, all virtual CPUs can use LMCE because the rendez-vous is
> done in the host.  Is this correct?
>

Yes, if it does not confuse the guest which sees LMCE available on
lower end or earlier CPUs (though I think someone would feel
happy). Or do we add it only to qemu64 and kvm64?

Haozhong