[Xen-changelog] [xen-unstable] [IA64] allow foreign domain page mapping of DOMID_XEN/DOMID_IO

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

# HG changeset patch
# User awilliam@xxxxxxxxxxxx
# Node ID 45f79978ceb5e93f42dc610cc93ad79b0c63055b
# Parent  bc3044bf49284178fce0d6296b16ac31f2376368
[IA64] allow foreign domain page mapping of DOMID_XEN/DOMID_IO

DOMID_XEN is used by xenmon, xentrace.

Signed-off-by: Isaku Yamahata <yamahata@xxxxxxxxxxxxx>
---
 xen/arch/ia64/xen/mm.c |   10 ++++++----
 1 files changed, 6 insertions(+), 4 deletions(-)

diff -r bc3044bf4928 -r 45f79978ceb5 xen/arch/ia64/xen/mm.c
--- a/xen/arch/ia64/xen/mm.c    Thu Dec 07 15:00:49 2006 -0700
+++ b/xen/arch/ia64/xen/mm.c    Thu Dec 07 15:02:37 2006 -0700
@@ -1295,11 +1295,13 @@ __dom0vp_add_physmap(struct domain* d, u
 
     if (unlikely(rd == d))
         goto out1;
-    if (is_gmfn) {
-        if (domid == DOMID_XEN || domid == DOMID_IO)
-            goto out1;
+    /*
+     * DOMID_XEN and DOMID_IO don't have their own p2m table.
+     * It can be considered that their p2m conversion is p==m.
+     */
+    if (likely(is_gmfn && domid != DOMID_XEN && domid != DOMID_IO))
         mfn = gmfn_to_mfn(rd, mfn_or_gmfn);
-    } else 
+    else 
         mfn = mfn_or_gmfn;
     if (unlikely(!mfn_valid(mfn) || get_page(mfn_to_page(mfn), rd) == 0))
         goto out1;

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