Re: [Xen-devel] [User Question] KVM and VirtualBox in Xen Dom0

[Lukas Laukamp <lukas@xxxxxxxxxx>]

Am 2012-09-20 09:52, schrieb Pasi KÃrkkÃinen:
> On Thu, Sep 20, 2012 at 09:44:41AM +0200, Lukas Laukamp wrote:
> > Am 2012-09-20 09:36, schrieb Pasi KÃrkkÃinen:
> > >On Thu, Sep 20, 2012 at 09:11:44AM +0200, Lukas Laukamp wrote:
> > >>Hello all,
> > >>
> > >>I have a simple user question but it's very technical and related 
> > to
> > >>the Xen core. Does KVM and VirtualBox work in a Xen Dom0 with Xen
> > >>4.2? So I would like to create a VM Host for deploying VM 
> > templates
> > >>which are compatible to the most solutions and host systems and I
> > >>think that Xen, KVM/QEmu and VirtualBox are the best choice for
> > >>this.
> > >>
> > >>Would be great when this is possible or could be implemented. Hope
> > >>that someone can give me an answer.
> > >>
> > >
> > >Nope, KVM or VirtualBox won't work in Xen dom0.
> > >
> > >But you can use Xen Nested Hardware Virtualization and run
> > >KVM/VirtualBox in Xen HVM guest.
> > >This is a "tech preview" currently.
> > >
> > >-- Pasi
> >
> > Hello,
> >
> > ok, this would be possible with Xen 4.2?
> In Xen 4.2.0 I think Nested Virt should work on AMD CPUs,
> but Intel CPUs require some additional patches that aren't yet in 4.2 
> branch.
> > And would it be possible to implement something that KVM and 
> > VirtualBox work in a Xen Dom0?
> Why do you want to run them in dom0 ?
>
> > Is this a task for the Xen development or something for the Linux
> > kernel,, KVM or VirtualBox?
> I think it *might* be possible when Xen PVH (Hybrid) is merged to Xen 
> 4.3,
> which basically allows running Xen dom0 in HVM container.
>
> -- Pasi
Hello,

I googled for xen Hybrid, but have question if I understand it correct. 
Now the Dom0 is a PV Guest. With Xen Hybrid the Dom0 can run as a HVM 
with PV features on the hypervisor. This would make it possible because 
of nested virtualization that KVM and VirtualBox run inside dom0 right?
And my second question would be: Is the aim of Xen hybrid to bring Dom0 
support to more OSes?
Best Regards

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