Re: [Qemu-devel] cpuid problem in upstream qemu with kvm

[Yaniv Kaul]

On 12/21/2009 1:12 PM, Avi Kivity wrote:
> On 12/20/2009 07:18 PM, Michael S. Tsirkin wrote:
> > > > Hmm, then, shouldn't either kvm or qemu mask features that we do not
> > > > emulate well enough to make windows not crash?
> > > -cpu host does that already, no?
> > >
> > > Alex
> > I expected so, but Avi here seems to say windows will crash if you
> > use a new CPU with it ...
>
> No, Windows tries to detect changes in your hardware and assumes that 
> if too many things change, you might be a pirate and requires you to 
> phone their offices to re-authenticate.

'Just' the CPU is not big deal. Might hit you with two 'bad' points.
Network interface + CPU will require re-activation.
( http://www.aumha.org/win5/a/wpa.php )
Y.