[Xen-changelog] [xen-unstable] [XEN] Add arch hook for max_mem domctl.

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

# HG changeset patch
# User Hollis Blanchard <hollisb@xxxxxxxxxx>
# Date 1172776731 21600
# Node ID 9f49a53fea30a031d3cc6315cfcbcc330b2464d1
# Parent  6b42b8c08731d7bc1abedac2239707e14ae8599d
[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@xxxxxxxxxx>
Signed-off-by: Hollis Blanchard <hollisb@xxxxxxxxxx>
---
 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 -r 6b42b8c08731 -r 9f49a53fea30 xen/common/domctl.c
--- a/xen/common/domctl.c       Thu Mar 01 14:32:58 2007 -0600
+++ b/xen/common/domctl.c       Thu Mar 01 13:18:51 2007 -0600
@@ -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_domc
         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 -r 6b42b8c08731 -r 9f49a53fea30 xen/include/asm-ia64/shadow.h
--- a/xen/include/asm-ia64/shadow.h     Thu Mar 01 14:32:58 2007 -0600
+++ b/xen/include/asm-ia64/shadow.h     Thu Mar 01 13:18:51 2007 -0600
@@ -61,6 +61,8 @@ shadow_mark_page_dirty(struct domain *d,
         return 0;
 }
 
+#define guest_physmap_max_mem_pages(d, n) (0)
+
 #endif // _XEN_SHADOW_H
 
 /*
diff -r 6b42b8c08731 -r 9f49a53fea30 xen/include/asm-powerpc/shadow.h
--- a/xen/include/asm-powerpc/shadow.h  Thu Mar 01 14:32:58 2007 -0600
+++ b/xen/include/asm-powerpc/shadow.h  Thu Mar 01 13:18:51 2007 -0600
@@ -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@xxxxxxxxxx>
+ *          Ryan Harper <ryanh@xxxxxxxxxx>
  */
 
 #ifndef _ASM_SHADOW_H_
@@ -58,4 +59,8 @@ static inline unsigned int shadow_get_al
 {
     return (1ULL << (d->arch.htab.order + PAGE_SHIFT)) >> 20;
 }
+
+#define guest_physmap_max_mem_pages(d, n) (0)
+
 #endif
+
diff -r 6b42b8c08731 -r 9f49a53fea30 xen/include/asm-x86/shadow.h
--- a/xen/include/asm-x86/shadow.h      Thu Mar 01 14:32:58 2007 -0600
+++ b/xen/include/asm-x86/shadow.h      Thu Mar 01 13:18:51 2007 -0600
@@ -121,6 +121,8 @@ static inline void shadow_remove_all_sha
     sh_remove_shadows(v, gmfn, 0 /* Be thorough */, 1 /* Must succeed */);
 }
 
+#define guest_physmap_max_mem_pages(d, n) (0)
+
 #endif /* _XEN_SHADOW_H */
 
 /*

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