Re: [Qemu-devel] [6567] KVM: Get all cpuid values from function 2 (Amit Shah)

[Anthony Liguori]

Avi Kivity wrote:
> Anthony Liguori wrote:
> > Revision: 6567
> >           http://svn.sv.gnu.org/viewvc/?view=rev&root=qemu&revision=6567
> > Author:   aliguori
> > Date:     2009-02-09 15:50:36 +0000 (Mon, 09 Feb 2009)
> >
> > Log Message:
> > -----------
> > KVM: Get all cpuid values from function 2 (Amit Shah)
> >
> > cpuid function 2 can have multiple values to describe cache behaviour.
> > Loop till we have fetched all the values.
> >   
>
> Note that if we are rescheduled on another cpu, or if another process 
> calls cpuid 2 during the loop on the same cpu, this will break.

That's unfortunate.  If cpuid values can differ for individual 
processors, than I don't see a great way to avoid this problem in general.

Regards,

Anthony Liguori