On 12/19/2011 04:11 PM, Jan Kiszka wrote:
> >>
> >> Backwards compatibility
> >
> > If we want backwards compatibility, we need more than just a simple feature check, no? Oh, you feed that into CPUID? That's nifty. Ok, so you behave like VMX/SVM do on real hardware - you always expose the functionality but don't list it in CPUID for older user space.
>
> Do we want this to be on when providing a compat machine type ("pc-0.12"
> etc.) to the guest? Then it does need more work (see the dance around
> kvmclock).
We do. I have a feeling the whole cpuid stuff, paravirt and
non-paravirt, needs some fixing in this area. It's different than the
normal compat code since not only qemu, but also kvm and the host cpu
have a say in what's supported and what's not.
--
error compiling committee.c: too many arguments to function
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