From: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Date: Wed, 30 Jun 2010 08:03:28 +0000 (+0800)
Subject: KVM: MMU: fix direct sp's access corrupted
X-Git-Tag: v2.6.36-rc1~580^2~48
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9e7b0e7fba45ca3c6357aeb7091ebc281f1de365;p=pandora-kernel.git

KVM: MMU: fix direct sp's access corrupted

If the mapping is writable but the dirty flag is not set, we will find
the read-only direct sp and setup the mapping, then if the write #PF
occur, we will mark this mapping writable in the read-only direct sp,
now, other real read-only mapping will happily write it without #PF.

It may hurt guest's COW

Fixed by re-install the mapping when write #PF occur.

Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---

Reading git-diff-tree failed