Re: [Xen-devel] How to detect if a machine is a Virtual machine ??

[Michal Novotny <minovotn@xxxxxxxxxx>]

On 12/23/2009 10:16 AM, John Haxby wrote:
> On 22/12/09 10:37, Michal Novotny wrote:
> > Hi Sachin,
> > the tool is not in the virtual machine. This is the tool that's in 
> > dom0. Since there is a source code for this one you could scp it to 
> > the guest, compile and run inside the guest environment. There is no 
> > need to provide a guest with this tool by default and in fact this is 
> > really impossible so it's better to scp it to the guest and compile 
> > there.
> It's also worth pointing out that the underlying test for xen in this 
> program executes a particular instruction to find the information 
> about its environment.   What that means is that it's possible to 
> write a version of ./tools/misc/xen-detect.c that will work in any 
> guest machine OS.
But one more point, if you want to know whether XEN_PV is returned for 
dom0 PV guest or domU (since it's the same for both) you can try to look 
for /proc/xen/privcmd. This one is available only in dom0 because 
privileged commands are for privileged domain (domain-0) only...
Michal

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