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[Xen-devel] pfn to mfn translation

  • To: xen-devel@xxxxxxxxxxxxxxxxxxx
  • From: "Bryan D. Payne" <bryan@xxxxxxxxxxxx>
  • Date: Tue, 3 May 2011 15:02:19 -0600
  • Delivery-date: Tue, 03 May 2011 14:03:47 -0700
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  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>

Is there a recommended way to convert a guest pfn to an mfn from
within dom0?  I'd like the mfn for calling xc_map_foreign_range in

Up until now I've been using code that is similar to what is in
tools/libxc/xc_linux_save.c.  However, my version of this code is now
breaking when used with Xen 4.1 (it worked with Xen 4.0.1).  So I'm
wondering if some of the internal p2m tables have changed.  In the
end, it seems like there should be a libxc function that performs this
translation rather than me needing to duplicate code and risk failures
such as what I'm seeing.  However, I don't see any p2m api calls in


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