From: Wei Yongjun <yjwei@cn.fujitsu.com>
Date: Thu, 15 Jul 2010 00:51:58 +0000 (+0800)
Subject: KVM: x86 emulator: fix xchg instruction emulation
X-Git-Tag: v2.6.36-rc1~580^2~8
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c19b8bd60e19308d5583ef200ddcc782d85d9543;p=pandora-kernel.git

KVM: x86 emulator: fix xchg instruction emulation

If the destination is a memory operand and the memory cannot
map to a valid page, the xchg instruction emulation and locked
instruction will not work on io regions and stuck in endless
loop. We should emulate exchange as write to fix it.

Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com>
Acked-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---

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