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Re: [Xen-devel] Re: x86_64 progress?

To: Nuutti Kotivuori <naked@xxxxxx>
Subject: Re: [Xen-devel] Re: x86_64 progress?
From: Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>
Date: Wed, 22 Dec 2004 14:02:37 +0000
Cc: Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxxx
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In-reply-to: Your message of "Wed, 22 Dec 2004 15:59:59 +0200." <87zn06wi00.fsf@xxxxxxxxxxxxxxxxxx>
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> Keir Fraser wrote:
> > We will only (at least initially) support 64-bit paravirtual guests
> > on 64-bit Xen. Of course you can run 32-bit apps over the 64-bit
> > guest OS using the existing compatibility layer.
> 
> Right.
> 
> > We will also probably support 32-bit unmodified guests running in
> > fully virtualised mode on Xen64.
> 
> Err... 32-bit unmodified guests? Fully virtualized? Would this be with
> the upcoming VT-extensions or would this be possible on any AMD64
> available today? Or does Xen64 mean Xen on IA-64 (ie. Itanium etc.)?

By Xen64 I mean Xen on x86/64. Full virtualisation will indeed require
technology such as Intel VT or AMD Pacifica. 

 -- Keir


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