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Re: [Xen-devel] xc_map_foreign_{range,batch}

To: George Dunlap <George.Dunlap@xxxxxxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>
Subject: Re: [Xen-devel] xc_map_foreign_{range,batch}
From: Keir Fraser <keir.fraser@xxxxxxxxxxxxx>
Date: Wed, 16 Dec 2009 21:26:20 +0000
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On 16/12/2009 18:50, "George Dunlap" <George.Dunlap@xxxxxxxxxxxxx> wrote:

> Why does xc_map_foreign_range() take an argument named mfn of type
> unsigned long, while xc_map_foreign_range() takes a list of pointers
> to type xen_pfn_t?  Is there a signficance to that difference -- i.e.,
> is one truly a guest pfn (which will be translated to an mfn using the
> guest p2m table), and the other truly an mfn (which will have no
> translation)?   Or are they both mfns?

Both are guest MFNs -- i.e., what guest thinks is an MFN (PFN for HVM guest;
MFN for PV guest).

 -- Keir

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