Xen devel - Dec 2006 - hypercall to get kernel version information about guest

Is there a hypercall to determine a guest kernel''s version and type
from
the control partition?

Peace.
Andrew



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No. The hypervisor does not even have that information (apart from knowing
the difference between ''HVM'' and ''PV'', and
that can be obtained via the
getdomaininfo domctl).

 -- Keir

On 8/12/06 15:56, "Andrew D. Ball" <aball@linux.vnet.ibm.com>
wrote:
> Is there a hypercall to determine a guest kernel''s version and
type from
> the control partition?
> 
> Peace.
> Andrew
> 
> 
> 
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@lists.xensource.com
> http://lists.xensource.com/xen-devel

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> Is there a hypercall to determine a guest kernel''s version and
type from
> the control partition?
Xen doesn''t really know what is running in the guest, so it would be up
to the
control tools to sort out this sort of detail.

A possible way of getting this information would be one of the following:

a) add a xend command that fetches the name of the kernel in the
domain''s
config file (and possibly looks in the file to figure out what kind of kernel 
it is)
b) add a xend command that asks the guest what kernel it''s running
(e.g. get
the guest to publish uname information via Xenstore)
c) add the ability to map and examine guest memory directly to look for the 
kernel name string

I can see it would be very useful from a VM management perspective to check 
for this sort of thing.

HTH,
Cheers,
Mark

-- 
Dave: Just a question. What use is a unicyle with no seat?  And no pedals!
Mark: To answer a question with a question: What use is a skateboard?
Dave: Skateboards have wheels.
Mark: My wheel has a wheel!

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