[Xen-changelog] [xen-unstable] Clear MPT l2 entries when allocating monitor pagetable

[Xen patchbot-unstable <patchbot-unstable@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User kfraser@xxxxxxxxxxxxxxxxxxxxx
# Node ID d60da1c0664d089deb01c93174abe6c91d667675
# Parent  b42b80403ddd93f42146ffddf190b56a86f54f69
Clear MPT l2 entries when allocating monitor pagetable
Changeset 10734 removed the code clearing MPT l2 entries, however
these entries are stained when copying from idle_pg_table_l2.

Signed-off-by: Xin Li <xin.b.li@xxxxxxxxx>
---
 xen/arch/x86/shadow_public.c |    2 ++
 1 files changed, 2 insertions(+)

diff -r b42b80403ddd -r d60da1c0664d xen/arch/x86/shadow_public.c
--- a/xen/arch/x86/shadow_public.c      Thu Jul 27 13:17:58 2006 +0100
+++ b/xen/arch/x86/shadow_public.c      Thu Jul 27 13:18:36 2006 +0100
@@ -438,6 +438,8 @@ static void alloc_monitor_pagetable(stru
             (l3e_get_flags(mpl3e[i]) & _PAGE_PRESENT) ?
             l2e_from_pfn(l3e_get_pfn(mpl3e[i]), __PAGE_HYPERVISOR) :
             l2e_empty();
+    for ( i = 0; i < (MACHPHYS_MBYTES >> (L2_PAGETABLE_SHIFT - 20)); i++ )
+        mpl2e[l2_table_offset(RO_MPT_VIRT_START) + i] = l2e_empty();
 
     if ( v->vcpu_id == 0 )
     {

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