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Re: [Xen-devel] Vanilla Linux 64-bit paravirt guest support

To: Mark McLoughlin <markmc@xxxxxxxxxx>
Subject: Re: [Xen-devel] Vanilla Linux 64-bit paravirt guest support
From: Michael Abd-El-Malek <mabdelmalek@xxxxxxx>
Date: Thu, 10 Apr 2008 10:32:35 -0400
Cc: Jeremy Fitzhardinge <jeremy@xxxxxxxx>, xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>, Eduardo Habkost <ehabkost@xxxxxxxxxx>
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On Apr 10, 2008, at 10:11 AM, Mark McLoughlin wrote:
On Thu, 2008-04-10 at 09:01 -0500, Jeremy Fitzhardinge wrote:
Michael Abd-El-Malek wrote:
Is 64-bit domU support available anywhere at the moment? For example,
what is the status of the git://git.et.redhat.com/xen-pvops-64.git
tree?  I pulled that tree and tried building 64-bit Xen domU support
(since this tree allows you to configure the kernel with that
capability, unlike the vanilla Linux tree). But compilation failed in
enlighten.c because xen_smp_ops isn't defined in x86_64.

Try building without CONFIG_SMP, it doesn't support that yet.

Other than SMP support, does the tree represent a fully functional 64- bit PV domU support? Does it also allow all hypercalls? Put another way: is a 64-bit PV domU from that tree less capable than a 64-bit PV domU from Xen's linux-2.6.18.8 tree?

Redhat have some patches which they're shipping in Fedora 9. Once F9 is out the door, I'm hoping they'll polish them into an upstreamable form. I don't know whether that git tree represents what's in F9, or if that's somewhere else; at the very least I'd expect you'd be able to pull the
patches out of the srpm.

Yep, this tree:

 http://git.et.redhat.com/?p=xen-pvops-64.git

is the work-in-progress x86_64 tree.

This tree:

 http://git.et.redhat.com/?p=linux-2.6-fedora-pvops.git

is what we're actually shipping for F-9. It includes the x86_64 work,
but some other paravirt_ops patches too, most of which are queued up
upstream.

Which tree do you recommend I use?

Thanks,
Mike

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