Re: How to detect if a machine is a Virtual machine ??

[Michal Novotny <minovotn@redhat.com>]

On 12/23/2009 10:34 AM, Michal Novotny wrote:
> 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...
Oh, sorry, I did mean for domU PV guest or dom0, of course...

Michal