[Xen-devel] [PATCH] remove useless super page recomputing in ept_set_entry

["Li, Xin" <xin.li@xxxxxxxxx>]

VMX: remove useless super page recomputing in ept_set_entry.

Caller to ept_set_entry must give a valid order that hardware supports, see 
set_p2m_entry in p2m.c.

Signed-off-by: Xin Li <xin.li@xxxxxxxxx>

diff -r a6d5b76abdcb xen/arch/x86/mm/hap/p2m-ept.c
--- a/xen/arch/x86/mm/hap/p2m-ept.c Tue Jun 29 18:20:14 2010 +0100
+++ b/xen/arch/x86/mm/hap/p2m-ept.c Wed Jun 30 09:59:40 2010 +0800
@@ -307,18 +307,10 @@
     }
     else
     {
-        int num = order / EPT_TABLE_ORDER;
         int level;
         ept_entry_t *split_ept_entry;

-        if ( (num >= 2) && hvm_hap_has_1gb(d) )
-            num = 2;
-        else if ( (num >= 1) && hvm_hap_has_2mb(d) )
-            num = 1;
-        else
-            num = 0;
-
-        for ( level = split_level; level > num ; level-- )
+        for ( level = split_level; level > walk_level ; level-- )
         {
             rv = ept_split_large_page(d, &table, &index, gfn, level);
             if ( !rv )

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