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Re: [Xen-users] HVM or PV

To: xen-users@xxxxxxxxxxxxxxxxxxx
Subject: Re: [Xen-users] HVM or PV
From: Geert Janssens <info@xxxxxxxxxxxx>
Date: Thu, 13 Aug 2009 18:02:42 +0200
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On Thursday 13 August 2009, Freddie Cash wrote:
> On Thu, Aug 13, 2009 at 7:23 AM, brun <jace21066@xxxxxxxxx> wrote:
> > Bugzilla from info@xxxxxxxxxxxx wrote:
> > > I'm just an average xen user, but I'm not really sure this is a valid
> > > or reliable test. I have got a Dual CPU, dual core AMD Opteron 221
> > > machine running xen. So I would expect the svm flag in /proc/cpuinfo. I
> > > don't see it,
> > > neither in dom0, nor in any of my PV domUs.
> >
> > Thanks.  This seems like a reasonable expectation.  My understanding
> > would be that svm is needed to support hvm, what I can't seem to
> > determine is whether or not it is imperative or simply makes certain
> > functionality or something possible.
> Very few, if any, of the second generation Opterons (xxx model numbers)
> support hardware virtualisation.  IOW, you cannot run HVM on these CPUs.
> Without hardware virtualisation support in the CPUs/chipset, you can only
> run PV domains.
> All third-generation and newer Opterons (xxxx model numbers) support
> hardware virtualisation.

I see there is a type on my original mail. My opterons have model number 2214, 
so third-generation or newer. And they are indeed hvm capable. I am running 
several windows domU's.



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