From mboxrd@z Thu Jan  1 00:00:00 1970
From: Razvan Cojocaru <rzvncj@gmail.com>
Subject: Re: Why does xc_map_foreign_range() refuse to map pfns
 below 1M from a domU
Date: Tue, 03 Dec 2013 20:59:20 +0200
Message-ID: <529E2A08.7070105@gmail.com>
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	<1386085913.13256.52.camel@kazak.uk.xensource.com>
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	<1386086974.13256.60.camel@kazak.uk.xensource.com>
	<529E16B0.5010104@citrix.com>
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To: Tomasz Wroblewski <tomasz.wroblewski@citrix.com>
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> We've ran into this issue in xenclient recently too, when we finally
> upgraded stubdomain's kernel to pvops version. It seems pvops kernel
> contains safeguard to only allow <1M mappings if it's dom0
> (xen_initial_domain()). This check is placed in arch/x86/xen/mmu.c:

Thanks Tomasz! That's a great lead.