Re: [Xen-devel] Shell test for pv vs hvm (vs dom0)

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

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.

 -- Keir

On 22/2/08 22:38, "Dan Magenheimer" <dan.magenheimer@xxxxxxxxxx> wrote:

> Thanks for pointing this tool out!  Looks useful.
> 
> Unfortunately, for it to be broadly useful, it would have
> to ship with all distros as compiling it "on demand" on
> the guest is often not an option.
> 
> Porting xen-detect to shell script doesn't look possible since
> it uses inline assembly.
> 
> Any other ideas?
> 
>> -----Original Message-----
>> From: Keir Fraser [mailto:Keir.Fraser@xxxxxxxxxxxx]
>> Sent: Friday, February 22, 2008 2:18 PM
>> To: dan.magenheimer@xxxxxxxxxx; xen-devel@xxxxxxxxxxxxxxxxxxx
>> Subject: Re: [Xen-devel] Shell test for pv vs hvm (vs dom0)
>> 
>> 
>> It's not a shell script, but tools/misc/xen-detect.c will do
>> what you want
>> on x86 platforms. To detect a Linux dom0 you can check for
>> 'control_d' in
>> /proc/xen/capabilities.
>> 
>>  -- Keir
>> 
>> On 22/2/08 20:58, "Dan Magenheimer"
>> <dan.magenheimer@xxxxxxxxxx> wrote:
>> 
>>> Is there an "officially sanctioned" method for a shell script to
>>> test whether it is running on a native OS vs pv OS vs hvm OS
>>> (and possibly also dom0 OS)?
>>> 
>>> I know there are lots of different ways to determine this but
>>> am wondering if any one will work across all (recent and future)
>>> implementations of Xen and across multiple (at least Linux-based)
>>> distros.
>>> 
>>> If not, perhaps there could/should be a C/python tool in
>> the Xen tree
>>> that does this?
>>> 
>>> ===================================
>>> If Xen could save time in a bottle / then clocks wouldn't
>> virtually skew /
>>> It would save every tick / for VMs that aren't quick /
>>> and Xen then would send them anew
>>> (with apologies to the late great Jim Croce)
>>> _______________________________________________
>>> Xen-devel mailing list
>>> Xen-devel@xxxxxxxxxxxxxxxxxxx
>>> http://lists.xensource.com/xen-devel
>> 
>> 
>> 
> 



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