From: kaf24@firebug.cl.cam.ac.uk <kaf24@firebug.cl.cam.ac.uk>
Date: Sun, 16 Apr 2006 14:41:31 +0000 (+0100)
Subject: Only BSP can really do clear_all_shadow_status.
X-Git-Tag: archive/raspbian/4.8.0-1+rpi1~1^2~16158^2
X-Git-Url: https://dgit.raspbian.org/%22http://www.example.com/cgi/success//%22http:/www.example.com/cgi/success/?a=commitdiff_plain;h=5473475c0e0604433a185ed4ea96cb9e09267f25;p=xen.git

Only BSP can really do clear_all_shadow_status.
This fixes SMP IA32 VMX guest booting on IA32 xen.

Signed-off-by: Xin Li <xin.b.li@intel.com>
---

diff --git a/xen/arch/x86/shadow32.c b/xen/arch/x86/shadow32.c
index 458bb99555..c8ff4f579c 100644
--- a/xen/arch/x86/shadow32.c
+++ b/xen/arch/x86/shadow32.c
@@ -3291,19 +3291,29 @@ void __update_pagetables(struct vcpu *v)
 
 void clear_all_shadow_status(struct domain *d)
 {
+    struct vcpu *v = current;
+
+    /*
+     * Don't clean up while other vcpus are working.
+     */
+    if ( v->vcpu_id )
+        return;
+
     shadow_lock(d);
+
     free_shadow_pages(d);
     free_shadow_ht_entries(d);
-    d->arch.shadow_ht = 
+    d->arch.shadow_ht =
         xmalloc_array(struct shadow_status, shadow_ht_buckets);
     if ( d->arch.shadow_ht == NULL ) {
-        printk("clear all shadow status:xmalloc fail\n");
+        printk("clear all shadow status: xmalloc failed\n");
         domain_crash_synchronous();
     }
     memset(d->arch.shadow_ht, 0,
            shadow_ht_buckets * sizeof(struct shadow_status));
 
     free_out_of_sync_entries(d);
+
     shadow_unlock(d);
 }