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

To: Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>
Subject: Re: [Xen-devel] Re: x86_64 progress?
From: Nuutti Kotivuori <naked@xxxxxx>
Date: Wed, 22 Dec 2004 15:59:59 +0200
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In-reply-to: <E1Ch6Rq-0001JF-00@xxxxxxxxxxxxxxxxx> (Keir Fraser's message of "Wed, 22 Dec 2004 13:22:38 +0000")
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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.)?

If running unmodified 32-bit guests with reasonable performance on any
x86_64 host is possible, that would be an absolute killer feature.

-- Naked



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