From mboxrd@z Thu Jan  1 00:00:00 1970
From: David Vrabel <dvrabel@cantab.net>
Subject: Re: Xen 4.1 + Linux compiled with PVH == BOOM
Date: Tue, 24 Dec 2013 12:31:17 +0000
Message-ID: <52B97E95.9060900@cantab.net>
References: <20131220175735.GA619@phenom.dumpdata.com>
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To: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>, xen-devel@lists.xensource.com, Mukesh Rathor <mukesh.rathor@oracle.com>, JBeulich@suse.com
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On 20/12/2013 17:57, Konrad Rzeszutek Wilk wrote:
> Hey,
> 
> This is with Linux and
> 
> git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen.git stable/pvh.v11
> 
> I get Xen 4.1 (only) hypervisor to blow up with a Linux kernel that has been
> compiled with PVH.
> 
> I think the same problem would show up if I tried to launch a PV guest 
> compiled as PVH under Xen 4.1 as well - as the ELF parsing code is shared
> with the toolstack.

If a kernel with both PVH and PV support enabled cannot boot in PV mode
with a non-PVH aware hypervisor/toolstack then the kernel is broken.

Hypervisor/tool-side fixes aren't the correct fix here.  Xen 4.1 and
even older are still widely deployed.

David