From: Mukesh Rathor <mukesh.rathor@oracle.com>
Date: Thu, 18 Oct 2012 00:11:21 +0000 (-0700)
Subject: xen: privcmd: support autotranslated physmap guests.
X-Git-Tag: omap-for-v3.8/fixes-for-merge-window-v4-signed~28^2^2~4
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d71f513985c22f1050295d1a7e4327cf9fb060da;p=pandora-kernel.git

xen: privcmd: support autotranslated physmap guests.

PVH and ARM only support the batch interface. To map a foreign page to
a process, the PFN must be allocated and the autotranslated path uses
ballooning for that purpose.

The returned PFN is then mapped to the foreign page.
xen_unmap_domain_mfn_range() is introduced to unmap these pages via the
privcmd close call.

Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Signed-off-by: Mukesh Rathor <mukesh.rathor@oracle.com>
[v1: Fix up privcmd_close]
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
[v2: used for ARM too]
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