From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Daniel P. Berrange" <berrange@redhat.com>
Subject: Re: Shell test for pv vs hvm (vs dom0)
Date: Mon, 25 Feb 2008 13:45:31 +0000
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	<C3E875B5.1CE19%Keir.Fraser@cl.cam.ac.uk>
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To: Keir Fraser <Keir.Fraser@cl.cam.ac.uk>
Cc: "dan.magenheimer@oracle.com" <dan.magenheimer@oracle.com>, "xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>, Alex Williamson <alex.williamson@hp.com>
List-Id: xen-devel@lists.xenproject.org

On Mon, Feb 25, 2008 at 01:40:05PM +0000, Keir Fraser wrote:
> Yes, that should work for Linux just fine I think.

On x86 at least you also have the option of using  dmidecode to detect an
HVM guest, looking for 'Xen' in the 'System Information' block.

And the 'xen-detect' command in tools/misc/ provides another way to
detect presence of Xen PV vs HVM.

> On 25/2/08 12:58, "Alex Williamson" <alex.williamson@hp.com> wrote:
> 
> > 
> > On Sat, 2008-02-23 at 08:18 +0000, Keir Fraser wrote:
> >> There's no general way to discriminate between HVM and native from a shell
> >> script. You might discriminate between HVM and PV on Linux by looking for
> >> /sys/hypervisor or /proc/xen.
> > 
> > Isn't something like this generally sufficient for a shell script?
> > 
> > lspci -n | grep -q "5853:0001"
> > if [ $? -eq 0 ]; then
> > # HVM domain
> > elif [ -d /proc/xen ]; then
> > if grep -q "control_d" /proc/xen/capabilities; then
> > # DOM0
> > else
> > # DOMU
> > fi
> > else
> > # Native
> > fi
> > 
> > It seems fairly reliable on ia64 for Xen 3.x.  Thanks,
> > 
> > Alex
> 
> 
> 
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