From: Xiao Guangrong <guangrong.xiao@linux.intel.com>
Date: Thu, 7 May 2015 08:20:15 +0000 (+0800)
Subject: KVM: MMU: fix smap permission check
X-Git-Tag: omap-for-v4.2/fixes-rc1^2~138^2~86
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ceee7df749da03fa17ab5dc7d06dffb4980a32db;p=pandora-kernel.git

KVM: MMU: fix smap permission check

Current permission check assumes that RSVD bit in PFEC is always zero,
however, it is not true since MMIO #PF will use it to quickly identify
MMIO access

Fix it by clearing the bit if walking guest page table is needed

Signed-off-by: Xiao Guangrong <guangrong.xiao@linux.intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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