From owner-p4-projects@FreeBSD.ORG  Thu Jan 17 05:59:00 2008
Return-Path: <owner-p4-projects@FreeBSD.ORG>
Delivered-To: p4-projects@freebsd.org
Received: by hub.freebsd.org (Postfix, from userid 32767)
	id D182116A41B; Thu, 17 Jan 2008 05:58:59 +0000 (UTC)
Delivered-To: perforce@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 9796016A417
	for <perforce@freebsd.org>; Thu, 17 Jan 2008 05:58:59 +0000 (UTC)
	(envelope-from kmacy@freebsd.org)
Received: from repoman.freebsd.org (repoman.freebsd.org
	[IPv6:2001:4f8:fff6::29])
	by mx1.freebsd.org (Postfix) with ESMTP id 8A02F13C442
	for <perforce@freebsd.org>; Thu, 17 Jan 2008 05:58:59 +0000 (UTC)
	(envelope-from kmacy@freebsd.org)
Received: from repoman.freebsd.org (localhost [127.0.0.1])
	by repoman.freebsd.org (8.14.1/8.14.1) with ESMTP id m0H5wxkq048214
	for <perforce@freebsd.org>; Thu, 17 Jan 2008 05:58:59 GMT
	(envelope-from kmacy@freebsd.org)
Received: (from perforce@localhost)
	by repoman.freebsd.org (8.14.1/8.14.1/Submit) id m0H5wxNJ048211
	for perforce@freebsd.org; Thu, 17 Jan 2008 05:58:59 GMT
	(envelope-from kmacy@freebsd.org)
Date: Thu, 17 Jan 2008 05:58:59 GMT
Message-Id: <200801170558.m0H5wxNJ048211@repoman.freebsd.org>
X-Authentication-Warning: repoman.freebsd.org: perforce set sender to
	kmacy@freebsd.org using -f
From: Kip Macy <kmacy@FreeBSD.org>
To: Perforce Change Reviews <perforce@freebsd.org>
Cc: 
Subject: PERFORCE change 133455 for review
X-BeenThere: p4-projects@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: p4 projects tree changes <p4-projects.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/p4-projects>,
	<mailto:p4-projects-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/p4-projects>
List-Post: <mailto:p4-projects@freebsd.org>
List-Help: <mailto:p4-projects-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/p4-projects>,
	<mailto:p4-projects-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Thu, 17 Jan 2008 05:59:00 -0000

http://perforce.freebsd.org/chv.cgi?CH=133455

Change 133455 by kmacy@pandemonium:kmacy:xen31 on 2008/01/17 05:58:52

	ignore page table entries without the valid bit set, treat
	them as if they were zero

Affected files ...

.. //depot/projects/xen31/sys/i386/include/xen/xenpmap.h#8 edit

Differences ...

==== //depot/projects/xen31/sys/i386/include/xen/xenpmap.h#8 (text+ko) ====

@@ -75,7 +75,7 @@
 
 #define INVALID_P2M_ENTRY	(~0UL)
 
-#define pmap_valid_entry(E)           ((E) > PAGE_SIZE) /* is PDE or PTE valid? */
+#define pmap_valid_entry(E)           ((E) & PG_V) /* is PDE or PTE valid? */
 
 #define SH_PD_SET_VA        1
 #define SH_PD_SET_VA_MA     2
@@ -102,7 +102,7 @@
 }
 #endif
 #define	PT_GET(_ptp)						\
-	(pmap_valid_entry(*(_ptp)) ? xpmap_mtop(*(_ptp)) : *(_ptp))
+	(pmap_valid_entry(*(_ptp)) ? xpmap_mtop(*(_ptp)) : (0))
 
 #ifdef WRITABLE_PAGETABLES