Re: KVM Guest detection

[jd <jdsw2002@yahoo.com>]

Thanks. Good to know that most hypervisors are using this mechanism.

/Jd

--- On Wed, 8/13/08, Anthony Liguori <anthony@codemonkey.ws> wrote:

> From: Anthony Liguori <anthony@codemonkey.ws>
> Subject: Re: KVM  Guest detection
> To: jdsw2002@yahoo.com
> Cc: "KVM List" <kvm@vger.kernel.org>
> Date: Wednesday, August 13, 2008, 11:59 AM
> jd wrote:
> > Hi
> >
> > Is there a way to detect if a particular machine is a
> VM running on KVM hypervisor or not. i.e from within a guest
> can one figure out if it is running on top of a hypervisor
> and not physical machine ? [For both Linux guests and
> Windows guests ]
> >   
> 
> The preferred way of doing this is checking CPUID leaf
> 0x4000 0000 for 
> the signature "KVMKVMKVM".
> 
> Most hypervisors (KVM, Xen, VMware, and Hyper-V) are
> adopting this as 
> the preferred detection mechanism.
> 
> Regards,
> 
> Anthony Liguori
> 
> > /Jd
> >
> >
> >
> >       
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