Increase size of level-2 initial PDE identity map from first 64MB of

physical RAM to first 1GB of physical RAM. This allows x86_64 xen to boot
larger dom0 images. Without this changes large dom0 images fail to
boot with "Unknown interrupt" on xen console and wedge.

Signed-off-by: Todd Clayton <todd.clayton@sun.com>

diff --git a/xen/arch/x86/boot/x86_64.S b/xen/arch/x86/boot/x86_64.S
index ffcd144811f817f78173076a7c0da8ef2089bdf7..a7d0310b31a6c584e7c9111ce5230b8e006c6a3a 100644 (file)
--- a/xen/arch/x86/boot/x86_64.S
+++ b/xen/arch/x86/boot/x86_64.S
@@ -252,10 +252,10 @@ ENTRY(idle_pg_table_4)
 ENTRY(idle_pg_table_l3)
         .quad idle_pg_table_l2 - __PAGE_OFFSET + 7
 
-/* Initial PDE -- level-2 page table. Maps first 64MB physical memory. */
+/* Initial PDE -- level-2 page table. Maps first 1GB physical memory. */
         .org 0x4000
 ENTRY(idle_pg_table_l2)
-        .macro identmap from=0, count=32
+        .macro identmap from=0, count=512
         .if \count-1
         identmap "(\from+0)","(\count/2)"
         identmap "(\from+(0x200000*(\count/2)))","(\count/2)"