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Re: [Xen-users] Mixture of 32/64 bit VMs

from [Mark Williamson]

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Subject:	Re: [Xen-users] Mixture of 32/64 bit VMs
From:	Mark Williamson <mark.williamson@xxxxxxxxxxxx>
Date:	Fri, 12 Jan 2007 16:05:50 +0000
Cc:	René Castillo <ReneCastillo@xxxxxxx>
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> as I currently understand it, being able to run both 32 bit and 64 bit
> domUs on the same hypervisor requires it to be a 64-bit hypervisor and
> the domUs being HVM, not paravirtualized. This in turn requires
> hardware with virtualization support.
>
> Is this true?

Yes on the current release.

I think there's now code in the xen-unstable.hg tree to support 32-bit PAE 
guests on the 64-bit hypervisor.  non-PAE 32-bit paravirtualised guests are 
still not supported.

> Now given these requirements, are there any restrictions on running
> 32 bit HVM domUs and 64 bit HVM domUs side-by-side on the same
> x86_64 hypervisor? What about 32-bit PAE HVM guests?

Yes, all fine.

> Can I mix a 64-bit paravirtualized guest with 32/64 bit HVM guests on
> a x86_64 hypervisor?

Also fine.

Cheers,
Mark

-- 
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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