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[Xen-devel] Mapping hvm guest pages in Dom0

  • To: Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>
  • From: Satya <satyakiran@xxxxxxxxx>
  • Date: Fri, 26 Sep 2008 12:02:09 -0700
  • Delivery-date: Fri, 26 Sep 2008 12:02:37 -0700
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  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>

I would like to map (Read/Write) pages owned by a HVM guest from my Dom0 Linux kernel module. I have access to the "machine frame numbers" of these pages.

1. What is the right interface to do this? kmap needs 'struct page' ptrs which I doubt exist for pages owned by a HVM guest. Is there a hypercall to do this then?

2. Do I need to modify the HVM behavior in any way for this? (e.g., load a driver in the guest that will setup grant tables?). I need to keep my guest "pure HVM".

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