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Re: [Xen-devel] Get MFN from the pv linux guest

from [Ian Campbell] [Permanent Link][Original]
To: Steven <wangwangkang@xxxxxxxxx>
Subject: Re: [Xen-devel] Get MFN from the pv linux guest
From: Ian Campbell <Ian.Campbell@xxxxxxxxxx>
Date: Tue, 15 Nov 2011 08:49:03 +0000
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On Tue, 2011-11-15 at 05:06 +0000, Steven wrote:
> Dear All,
> I am trying get the machine frame number of the corresponding
> pseudo-physical page number in a PV Linux guest.
> Could anyone suggest which data structure I have to take a look? Thanks.

You need to look up in the p2m table. This is maintained by the guest OS
so the method for accessing it is a bit kernel specific but there is
generally a function like pfn_to_mfn() or so.

Ian.


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