From mboxrd@z Thu Jan  1 00:00:00 1970
From: Xudong Hao <xudong.hao@intel.com>
Subject: [PATCH 2/3] xen/p2m: Using INVALID_MFN instead of
	mfn_valid
Date: Wed, 15 Aug 2012 14:55:20 +0800
Message-ID: <1345013720-20640-1-git-send-email-xudong.hao@intel.com>
Mime-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit
Return-path: <xen-devel-bounces@lists.xen.org>
List-Unsubscribe: <http://lists.xen.org/cgi-bin/mailman/options/xen-devel>,
	<mailto:xen-devel-request@lists.xen.org?subject=unsubscribe>
List-Post: <mailto:xen-devel@lists.xen.org>
List-Help: <mailto:xen-devel-request@lists.xen.org?subject=help>
List-Subscribe: <http://lists.xen.org/cgi-bin/mailman/listinfo/xen-devel>,
	<mailto:xen-devel-request@lists.xen.org?subject=subscribe>
Sender: xen-devel-bounces@lists.xen.org
Errors-To: xen-devel-bounces@lists.xen.org
To: xen-devel@lists.xen.org
Cc: @xen.org, Xudong Hao <xudong.hao@intel.com>, tim@xen.orgtim, Xiantao Zhang <xiantao.zhang@intel.com>
List-Id: xen-devel@lists.xenproject.org

64 bits big bar's MMIO address may out of the highest gfn, then mfn_valid 
may return failure, so using INVALID_MFN to measure.

Signed-off-by: Xiantao Zhang <xiantao.zhang@intel.com>
Signed-off-by: Xudong Hao <xudong.hao@intel.com>

diff -r 663eb766cdde xen/arch/x86/mm/p2m-ept.c
--- a/xen/arch/x86/mm/p2m-ept.c	Tue Jul 24 17:02:04 2012 +0200
+++ b/xen/arch/x86/mm/p2m-ept.c	Thu Jul 26 15:40:01 2012 +0800
@@ -428,7 +428,7 @@ ept_set_entry(struct p2m_domain *p2m, un
     }
 
     /* Track the highest gfn for which we have ever had a valid mapping */
-    if ( mfn_valid(mfn_x(mfn)) &&
+    if ( (mfn_x(mfn) != INVALID_MFN) &&
          (gfn + (1UL << order) - 1 > p2m->max_mapped_pfn) )
         p2m->max_mapped_pfn = gfn + (1UL << order) - 1;