From 2f0a6397dd3cac2fb05b46cad08c1d532c04d6b8 Mon Sep 17 00:00:00 2001
From: Zhihui Zhang <zzhsuny@gmail.com>
Date: Mon, 30 Dec 2013 15:56:29 -0500
Subject: [PATCH] KVM: VMX: check use I/O bitmap first before unconditional I/O
 exit

According to Table C-1 of Intel SDM 3C, a VM exit happens on an I/O instruction when
"use I/O bitmaps" VM-execution control was 0 _and_ the "unconditional I/O exiting"
VM-execution control was 1. So we can't just check "unconditional I/O exiting" alone.
This patch was improved by suggestion from Jan Kiszka.

Reviewed-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Zhihui Zhang <zzhsuny@gmail.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
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