[Xen-devel] detecting a xen environment easily

[Guillaume Rousse <Guillaume.Rousse@xxxxxxxx>]

Hello list.

I'm looking for a way to easily segregate paravirtualized hosts,
hardware virtualized hosts, and native hosts for sysadmin purpose
(installing specific software or configuration files through cfengine).

So far, I found the presence of a /proc/xen directory indicated either a
paravirtualized host, or a dom0 native host, with the additional
presence of /proc/xen/xsd_* files distinguishing between the two last
ones. However, I didn't found any way to distinguish between other
native host (non dom0 ones), and hardware virtualized hosts.

In "Definitive guide to the xen hypervisor" book from D. Chisnall, i
found some C code allowing to do it, based on CPUID cpu instruction
usage. I didn't tried it yet, but isn't it any way to do something
similar with non-compiled code, for portability issues (distributing a
python script is far easier than providing as much different binaries
than monitored platform) ?

Also, is there any better way to achieve what I'm currently trying to do ?
-- 
Guillaume Rousse
Moyens Informatiques - INRIA Futurs
Tel: 01 69 35 69 62

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