From e63574cd5f5a6862285212b5434878dceb11ec91 Mon Sep 17 00:00:00 2001
From: Hollis Blanchard <hollisb@us.ibm.com>
Date: Thu, 1 Mar 2007 13:18:51 -0600
Subject: [PATCH] [XEN] Add arch hook for max_mem domctl.

This patch introduces an arch hook in the MAX_MEM hcall. In particular, PowerPC
will use this hook to create/update a p2m mapping array. This patch introduces
the hook only and should compile away on all arches.

Signed-off-by: Ryan Harper <ryanh@us.ibm.com>
Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com>

--HG--
extra : transplant_source : %BD%0B%97%A5i%FE%9F%5C%99%C2%01S%80%B6%C0%F0%82_l%A3
---
 xen/common/domctl.c              | 4 ++++
 xen/include/asm-ia64/shadow.h    | 2 ++
 xen/include/asm-powerpc/shadow.h | 7 ++++++-
 xen/include/asm-x86/shadow.h     | 2 ++
 4 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/xen/common/domctl.c b/xen/common/domctl.c
index fd85b8cbd8..3a45586d65 100644
--- a/xen/common/domctl.c
+++ b/xen/common/domctl.c
@@ -20,6 +20,7 @@
 #include <xen/rcupdate.h>
 #include <xen/guest_access.h>
 #include <xen/bitmap.h>
+#include <xen/shadow.h>
 #include <asm/current.h>
 #include <public/domctl.h>
 #include <acm/acm_hooks.h>
@@ -608,6 +609,9 @@ long do_domctl(XEN_GUEST_HANDLE(xen_domctl_t) u_domctl)
         spin_lock(&d->page_alloc_lock);
         if ( new_max >= d->tot_pages )
         {
+            ret = guest_physmap_max_mem_pages(d, new_max);
+            if ( ret != 0 )
+                break;
             d->max_pages = new_max;
             ret = 0;
         }
diff --git a/xen/include/asm-ia64/shadow.h b/xen/include/asm-ia64/shadow.h
index b877f76ea2..12d16c0e4b 100644
--- a/xen/include/asm-ia64/shadow.h
+++ b/xen/include/asm-ia64/shadow.h
@@ -61,6 +61,8 @@ shadow_mark_page_dirty(struct domain *d, unsigned long gpfn)
         return 0;
 }
 
+#define guest_physmap_max_mem_pages(d, n) (0)
+
 #endif // _XEN_SHADOW_H
 
 /*
diff --git a/xen/include/asm-powerpc/shadow.h b/xen/include/asm-powerpc/shadow.h
index e58191a7e9..f9703270ab 100644
--- a/xen/include/asm-powerpc/shadow.h
+++ b/xen/include/asm-powerpc/shadow.h
@@ -13,9 +13,10 @@
  * along with this program; if not, write to the Free Software
  * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  *
- * Copyright (C) IBM Corp. 2005, 2006
+ * Copyright IBM Corp. 2005, 2006, 2007
  *
  * Authors: Hollis Blanchard <hollisb@us.ibm.com>
+ *          Ryan Harper <ryanh@us.ibm.com>
  */
 
 #ifndef _ASM_SHADOW_H_
@@ -58,4 +59,8 @@ static inline unsigned int shadow_get_allocation(struct domain *d)
 {
     return (1ULL << (d->arch.htab.order + PAGE_SHIFT)) >> 20;
 }
+
+#define guest_physmap_max_mem_pages(d, n) (0)
+
 #endif
+
diff --git a/xen/include/asm-x86/shadow.h b/xen/include/asm-x86/shadow.h
index cfd8e841c8..e08b971e7a 100644
--- a/xen/include/asm-x86/shadow.h
+++ b/xen/include/asm-x86/shadow.h
@@ -121,6 +121,8 @@ static inline void shadow_remove_all_shadows(struct vcpu *v, mfn_t gmfn)
     sh_remove_shadows(v, gmfn, 0 /* Be thorough */, 1 /* Must succeed */);
 }
 
+#define guest_physmap_max_mem_pages(d, n) (0)
+
 #endif /* _XEN_SHADOW_H */
 
 /*
-- 
2.30.2