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Re: [Xen-users] xen over quemu OR quemu in Xen domU on a system with HVM

To: xen-users@xxxxxxxxxxxxxxxxxxx, Igor Chubin <igor@xxxxxxx>
Subject: Re: [Xen-users] xen over quemu OR quemu in Xen domU on a system with HVM-capable CPU
From: Mark Williamson <mark.williamson@xxxxxxxxxxxx>
Date: Thu, 31 May 2007 02:52:38 +0100
Cc: "Petersson, Mats" <Mats.Petersson@xxxxxxx>
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On Wednesday 30 May 2007, Igor Chubin wrote:
> ...
> > > Actually, I want to run
> > >
> > > quemu + kquemu inside Xen Domain 0 on the HVM-capable system.
> >
> > No, because kqemu is still requiring access to ring 0 protection level
> > (that's the highest privilege level), which is still not available to
> > anything other than the hypvervisor itself - you can get a "different"
> > ring 0 for guest domains, but that's not in Dom0.
> So I can run kquemu inside domU but not in dom0?
> Right?

In a HVM domU, yes.  It should work in principle...

> I can get different ring 0 for domUs,
> and this gives me possibilty to run kquemu inside domUs?

Yes, but the performance might not be great, and I doubt anyone has ever 
tested that this works!

I guess the other thing to consider is whether you'd be better off running 
something like VMware server, if the freely available solutions don't fit 
your needs?


Dave: Just a question. What use is a unicyle with no seat?  And no pedals!
Mark: To answer a question with a question: What use is a skateboard?
Dave: Skateboards have wheels.
Mark: My wheel has a wheel!

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