From: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Date: Fri, 12 Nov 2010 06:47:01 +0000 (+0800)
Subject: KVM: MMU: clear apfs if page state is changed
X-Git-Tag: v2.6.38-rc1~244^2~95
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e5f3f027960128035a5fa176877b5e9160b35397;p=pandora-kernel.git

KVM: MMU: clear apfs if page state is changed

If CR0.PG is changed, the page fault cann't be avoid when the prefault address
is accessed later

And it also fix a bug: it can retry a page enabled #PF in page disabled context
if mmu is shadow page

This idear is from Gleb Natapov

Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
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