>From what I remember "-cpu" is to tell the vm what cpu extensions are available. I always just use "-cpu host" which has kvm pass in all the cpu extensions that the host processor has. Using WindowsXP mode on a windows 7 VM sounds dirty. XP mode used to require virtualization hardware, now it doesn't. Perhaps passing in a cpu that doesn't have virtualization extensions is the way to make windows go the non-hardware route. I would expect the performance to be abysmal, but it would be a neat trick. Patrick > -----Original Message----- > From: centos-bounces at centos.org [mailto:centos-bounces at centos.org] On > Behalf Of Jerry Geis > Sent: Wednesday, January 05, 2011 8:09 AM > To: CentOS ML > Subject: Re: [CentOS] using kvm > > > > > I have not tried a VM within a VM (nested) although I have heard that > > it is possible. > > > > I guess the correct processor type could be passed with the "-cpu " > parameter. > > > > -- Arun Khan > > > I have tried "-cpu phenum" which does not run at all. > and I tried "-cpu core2duo" which runs the guest but does not run the > VM > within a VM. > > Thanks, > > Jerry > > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos