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Re: [Xen-devel] how to tell if a DomU (HVM) touches a specific address
| To: | James Harper <james.harper@xxxxxxxxxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] how to tell if a DomU (HVM) touches a specific address |
| From: | Gianluca Guida <gianluca.guida@xxxxxxxxxxxxx> |
| Date: | Sun, 21 Jun 2009 14:00:48 +0200 |
| Cc: | xen-devel@xxxxxxxxxxxxxxxxxxx |
| Delivery-date: | Sun, 21 Jun 2009 05:01:17 -0700 |
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On Sat, Jun 20, 2009 at 2:25 PM, James
Harper<james.harper@xxxxxxxxxxxxxxxx> wrote:
> I need to know if my Windows DomU attempts to read or write (or even
> map) a certain physical address. Is there a way I could do this? Maybe
> via xentrace?
If you don't want to modify the Shadow/HAP level, an idea would be, in
case it's physical RAM, to create a dummy MMIO device. This way it
will trap at every access to the memory you're interested and be able
to look at it via xentrace/printk/etc.
Thanks,
Gianluca
--
It was a type of people I did not know, I found them very strange and
they did not inspire confidence at all. Later I learned that I had been
introduced to electronic engineers.
E. W. Dijkstra
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