Re: [Xen-users] How to determine if executing under Xen

[Andrej Radonic <andrej.radonic@xxxxxxxx>]

Henning Sprang schrieb:
> On 7/27/06, mjfeeney@xxxxxxxxxxx <mjfeeney@xxxxxxxxxxx> wrote:
> > Hello,
> >
> >  I apologize if this has been asked before.  I searched but could not 
> > find a
> > similar question.
> >
> >  I am writing a device driver targeted for Linux 2.6.16 running under Xen
> > 3.0.
> If this is the target, why worry about scenarios when the driver is no
> running on xen?
>
> > Is there an easy mechanism for my code to determine if Linux is
> > running as a Xen domain rather than natively?  I want to behave slightly
> > differently in each case.
> Sounds like a xen developer question.
>
> I am not kernel hacker enough to know how a kernel module can find
> which other modules are active. If there's a way, I'd just check for
> the xen specific modules. For example, the xen kernel is running on a
> specific subarchitecture of i386, if you can find that, you are on a
> xen kernel.
have a look a the Xen Demo-CD. Some time ago I had a look at all the 
scripts hacked in to it to do all kinds of magic stuff (like 
auto-starting vncviewer and so on. I remember stumbling across several 
places whith checks if the instance is runnnig as guest or dom0.
Bye,
Andrej

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