[Xen-devel] viewing memory in domU

["Bryan D. Payne" <bryan@xxxxxxxxxxxx>]

I'm looking at developing an application to run in dom0 that will  
need a view into the memory of machines in domU.  For now it will be  
a read-only view, but I'd like to experiment with read-write later.   
I've done some poking around in the source code and found the  
xc_map_foreign_range function in libxc.  From what I could tell, this  
is (at least one way) how to do this.  So, a couple of questions:
* This function doesn't seem to be used very much.  The only usage  
that I could find was in the XenTrace tool.  So I just wanted to  
confirm that this function was still maintained and not getting ready  
to go away with the 3.0 changes.
* Is there any reason that this functionality isn't implemented in  
the lowlevel/xc library in python?  Perhaps just because there isn't  
as much demand for it?  Or is there a deeper implementation issue?
* Are there other ways to view the memory of domU machines?   
Similarly, are there any ways to view items such as CPU registers of  
the domU machines?
* Given that the type of usage that I have in mind is going to be  
somewhat high bandwidth (i.e., need to constantly read and re-read  
memory on the domU machine(s)), is this function the best way to go?   
Or would you recommend that I look into another way?
Thanks for the help!

-bryan

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