svn commit: r222150 - in stable/8/sys: amd64/amd64 amd64/include i386/i386 i386/include

[Jung-uk Kim]

On Friday 20 May 2011 06:30 pm, Kostik Belousov wrote:
> On Fri, May 20, 2011 at 10:22:56PM +0000, Jung-uk Kim wrote:
> > Author: jkim
> > Date: Fri May 20 22:22:56 2011
> > New Revision: 222150
> > URL: http://svn.freebsd.org/changeset/base/222150
> >
> > Log:
> >   MFC:	r221188
> >
> >   Define "Hypervisor Present" bit.  This bit is used by several
> > hypervisors to identify CPUs running under emulation.
>
> In the latest revision of the Software Developer's Manual, Intel
> stated that bit 31 is always 0 for the real CPUs. So it is as much
> official as it can be.

OTOH, AMD's "CPUID Specification" says "Reserved for use by hypervisor 
to indicate guest status". :-)

Jung-uk Kim