linux-kernel - Re: [Xen-devel] [PATCH] xen PVonHVM: require at least Xen 3.4 as dom0

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Date:	Tue, 30 Oct 2012 19:28:59 +0100
From:	Olaf Hering <olaf@...fle.de>
To:	Pasi Kärkkäinen <pasik@....fi>
Cc:	Jeremy Fitzhardinge <jeremy@...p.org>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	xen-devel@...ts.xensource.com, linux-kernel@...r.kernel.org
Subject: Re: [Xen-devel] [PATCH] xen PVonHVM: require at least Xen 3.4 as dom0

On Tue, Oct 30, Pasi Kärkkäinen wrote:

> On Tue, Oct 30, 2012 at 05:05:05PM +0100, Olaf Hering wrote:
> > The XenPVHVM extensions have not been tested much on very old
> > hypervisors. At least Xen 3.4 gets some testing with the pvops kernel.
> > 
> > Require at least Xen 3.4 for the PVonHVM extensions. If an older
> > hypervisor is detected the extensions will be disabled and the guest
> > will only see emulated hardware.
> > 
> > Signed-off-by: Olaf Hering <olaf@...fle.de>
> >
> 
> IIRC upstream Linux PVonHVM drivers do work OK today on RHEL5 Xen, 
> which advertises itself as Xen 3.1.2-based..

If thats the case, and a combination thats supposed to work, the patch
can be dropped if the hvmloader does really leave room at
FE700000-FE800000.

Olaf
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