From: Tim Deegan <Tim.Deegan@xensource.com>
Date: Wed, 14 Feb 2007 14:44:07 +0000 (+0000)
Subject: [XEN] Re-sync PAE l3 shadows when PV guests change them
X-Git-Tag: archive/raspbian/4.8.0-1+rpi1~1^2~15327^2^2~5
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=34bac08a56e084bdd11dd83cba9a35be886079d8;p=xen.git

[XEN] Re-sync PAE l3 shadows when PV guests change them
-in particular, for PAE Solaris guests
Signed-off-by: Tim Deegan <Tim.Deegan@xensource.com>
---

diff --git a/xen/arch/x86/mm.c b/xen/arch/x86/mm.c
index 2ef442f546..2d0afd735f 100644
--- a/xen/arch/x86/mm.c
+++ b/xen/arch/x86/mm.c
@@ -977,6 +977,19 @@ static void pae_flush_pgd(
     l3_pgentry_t  *l3tab_ptr;
     struct pae_l3_cache *cache;
 
+    if ( unlikely(shadow_mode_enabled(d)) )
+    {
+        cpumask_t m = CPU_MASK_NONE;
+        /* Re-shadow this l3 table on any vcpus that are using it */
+        for_each_vcpu ( d, v )
+            if ( pagetable_get_pfn(v->arch.guest_table) == mfn )
+            {
+                paging_update_cr3(v);
+                cpus_or(m, m, v->vcpu_dirty_cpumask);
+            }
+        flush_tlb_mask(m);
+    }
+
     /* If below 4GB then the pgdir is not shadowed in low memory. */
     if ( !l3tab_needs_shadow(mfn) )
         return;