Re: [Qemu-devel] [RFC 0/2] GET_EMULATED_CPUID support with "allow-emulation" option

[Alexander Graf]

On 05.06.14 18:52, Paolo Bonzini wrote:
> Il 05/06/2014 18:45, Alexander Graf ha scritto:
> > > >
> > >
> > > Only if you were using "-cpu somethingThatHasAVX", though, no?
> >
> > Yes. The same argument goes the other way around. I want to use AVX
> > emulation, do "allow-emulation" and suddenly I get MONITOR/MWAIT 
> > emulation.
>
> What about:
>
> - letting "-cpu foo,+emulatedfeature" just work
>
> - adding emulated=yes that blindly enables all emulated features
>
> - making "-cpu ...,check" prints a warning for emulated features 
> unless emulated=yes

So:

  -cpu foo,+emulatedFeature just works

  -cpu foo,+notEmulatedFeature still sets the CPUID bit for that feature

  -cpu foo,check prints warnings for all cpuid bits not in the 
"allowed" bitmap. It prints different warnings depending on whether the 
bit is in "emulated" or not


Alex