MFN = Machine Frame Number i.e. the frame number in the *real* machine memory,
rather than the domain pseudophysical address.
> If this assumption is correct, how do I get a value for mfn? Say for
> instance, that I wanted to map the kernel running in the guest domain?
> How about a specific process?
It depends what you''re doing...
If you''re mapping some sort of device channel that talks to a driver in
the
guest, you''d want the guest to pass you the MFN number (obtained using
e.g.
"virt_to_machine() >> PAGE_SHIFT") using a control message or
some other
out-of-band means.
I think the control tools use some kind of hypercall to find out the list of
pages owned by a domain for operations (e.g. for suspend / resume / domain
building).
There may be other things you could try but rather than speculating,
I''ll
leave it up to others. What exactly are you trying to achieve?
Cheers,
Mark
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