From: Keir Fraser <keir.fraser@citrix.com>
Date: Thu, 28 Feb 2008 13:40:30 +0000 (+0000)
Subject: x86 shadow: Audit tables and guest walk when we know they are consistent.
X-Git-Tag: archive/raspbian/4.8.0-1+rpi1~1^2~14296^2~6
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=26f3c25a43fcfb6bc24017bff494ba34f70e0811;p=xen.git

x86 shadow: Audit tables and guest walk when we know they are consistent.
From: Gianluca Guida <gianluca.guida@eu.citrix.com>
Signed-off-by: Keir Fraser <keir.fraser@citrix.com>
---

diff --git a/xen/arch/x86/mm/shadow/multi.c b/xen/arch/x86/mm/shadow/multi.c
index 2c717123d1..de1d923701 100644
--- a/xen/arch/x86/mm/shadow/multi.c
+++ b/xen/arch/x86/mm/shadow/multi.c
@@ -2952,8 +2952,6 @@ static int sh_page_fault(struct vcpu *v,
 #endif /* (SHADOW_OPTIMIZATIONS & SHOPT_VIRTUAL_TLB) */
 
     shadow_lock(d);
-    shadow_audit_tables(v);
-    sh_audit_gw(v, &gw);
 
     if ( gw_remove_write_accesses(v, va, &gw) )
     {
@@ -2972,6 +2970,9 @@ static int sh_page_fault(struct vcpu *v,
         return EXCRET_fault_fixed;
     }
 
+    shadow_audit_tables(v);
+    sh_audit_gw(v, &gw);
+
     /* Make sure there is enough free shadow memory to build a chain of
      * shadow tables. (We never allocate a top-level shadow on this path,
      * only a 32b l1, pae l1, or 64b l3+2+1. Note that while