From mboxrd@z Thu Jan  1 00:00:00 1970
From: Keir Fraser <keir.xen@gmail.com>
Subject: Re: [PATCH 00/11] [v2] misc changes for kexec in
	pv-on-hvm guests
Date: Thu, 28 Jul 2011 14:43:43 +0100
Message-ID: <CA57261F.1EB25%keir.xen@gmail.com>
References: <20110728132300.248098023@aepfle.de>
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To: Olaf Hering <olaf@aepfle.de>, xen-devel@lists.xensource.com
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On 28/07/2011 14:23, "Olaf Hering" <olaf@aepfle.de> wrote:

> A fixed kexec-tools-2.0.2 package is required:
> http://lists.infradead.org/pipermail/kexec/2011-May/005026.html
> However, as I just found out, xenfs unconditionally adds
> /proc/xen/capabilities
> even for hvm guest.
> 
> So: how is a hvm guest supposed to be detected in 3.0?

Rip the moving parts from tools/misc/xen-detect.c. It does rely on hooking
SIGILL if you want to safely probe for being a PV guest (uses a
paravirtualised CPUID instruction that is normally an illegal instruction).

 -- Keir