[Xen-devel] [PATCH] x86-64-paging-init.patch

[Arun Sharma <arun.sharma@xxxxxxxxx>]

Calling alloc_boot_pages() after end_boot_allocator() could result in
double allocation of the same page.

Signed-off-by: Chengyuan Li <chengyuan.li@xxxxxxxxx>
Signed-off-by: Arun Sharma <arun.sharma@xxxxxxxxx>

--- 1.21/xen/arch/x86/x86_64/mm.c       2005-03-19 11:36:41 -08:00
+++ edited/xen/arch/x86/x86_64/mm.c     2005-03-21 15:53:23 -08:00
@@ -118,6 +118,7 @@
 {
     unsigned long i, p, max;
     l3_pgentry_t *l3rw, *l3ro;
+    struct pfn_info *pg;
 
     /* Map all of physical memory. */
     max = ((max_page + L1_PAGETABLE_ENTRIES - 1) & 
@@ -130,10 +131,11 @@
      */
     for ( i = 0; i < max_page; i += ((1UL << L2_PAGETABLE_SHIFT) / 8) )
     {
-        p = alloc_boot_pages(1UL << L2_PAGETABLE_SHIFT,
-                             1UL << L2_PAGETABLE_SHIFT);
-        if ( p == 0 )
+        pg = alloc_domheap_pages(NULL, 
+                                 (L2_PAGETABLE_SHIFT - L1_PAGETABLE_SHIFT));
+        if ( pg == 0 )
             panic("Not enough memory for m2p table\n");
+        p = page_to_phys(pg);
         map_pages(idle_pg_table, RDWR_MPT_VIRT_START + i*8, p, 
                   1UL << L2_PAGETABLE_SHIFT, PAGE_HYPERVISOR | _PAGE_USER);
         memset((void *)(RDWR_MPT_VIRT_START + i*8), 0x55,


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