From: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Date: Wed, 10 Sep 2014 22:49:30 +0000 (+0000)
Subject: xen/arm: introduce XENFEAT_grant_map_identity
X-Git-Tag: fixes-for-v3.18-merge-window~133^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5ebc77de83c7b74543de774afa7395b3b790e65e;p=pandora-kernel.git

xen/arm: introduce XENFEAT_grant_map_identity

The flag tells us that the hypervisor maps a grant page to guest
physical address == machine address of the page in addition to the
normal grant mapping address. It is needed to properly issue cache
maintenance operation at the completion of a DMA operation involving a
foreign grant.

Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Tested-by: Denis Schneider <v1ne2go@gmail.com>
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