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[Xense-devel] Xen memory management


  • To: <xense-devel@xxxxxxxxxxxxxxxxxxx>
  • From: "Myong H. Kang" <mkang@xxxxxxxxxxxxxxxx>
  • Date: Thu, 16 Feb 2006 09:14:38 -0500
  • Delivery-date: Thu, 16 Feb 2006 14:28:50 +0000
  • Importance: Normal
  • List-id: "A discussion list for those developing security enhancements for Xen." <xense-devel.lists.xensource.com>

Dear Xen experts,

I have some naïve questions about Xen memory management. 

Xen interface manual describes the following:
"Xen maintains a globally readable machine-to-physical table which
records the mapping from machine page frames to pseudo-physical ones."

The questions are: 
What does it mean by "globally readable"? Which hypercall is being used to
access this table from a guest domain (or is there some other way to access
this table from a guest domain)?
Is it possible to read memory content of guest domain B (or domain 0) from
guest domain A? 

 
Thanks,

Myong  




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