[Xen-changelog] [xen-unstable] [XEN] 32on64 kexec: Make the compat page table cover the first 4G of physical memory.

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

# HG changeset patch
# User Ian Campbell <ian.campbell@xxxxxxxxxxxxx>
# Date 1173890164 0
# Node ID fa3d25355aa27eb814526bf965a9267104525e73
# Parent  35c9a1939ae43e62d56666b59d2db3da1c8f9d37
[XEN] 32on64 kexec: Make the compat page table cover the first 4G of physical 
memory.

This gives the guest kernel more flexibility on where it places the control 
page.

Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxxxxx>
---
 xen/arch/x86/x86_64/compat_kexec.S |   13 ++++++++-----
 1 files changed, 8 insertions(+), 5 deletions(-)

diff -r 35c9a1939ae4 -r fa3d25355aa2 xen/arch/x86/x86_64/compat_kexec.S
--- a/xen/arch/x86/x86_64/compat_kexec.S        Wed Mar 14 12:49:40 2007 +0000
+++ b/xen/arch/x86/x86_64/compat_kexec.S        Wed Mar 14 16:36:04 2007 +0000
@@ -103,13 +103,13 @@ compat_page_list:
 
         /*
          * These compat page tables contain an identity mapping of the
-         * first 1G of the physical address space.
+         * first 4G of the physical address space.
          */
 compat_pg_table:
         .long compat_pg_table_l2 + 0*PAGE_SIZE + 0x01 - __PAGE_OFFSET, 0
-        .long 0, 0
-        .long 0, 0
-        .long 0, 0
+        .long compat_pg_table_l2 + 1*PAGE_SIZE + 0x01 - __PAGE_OFFSET, 0
+        .long compat_pg_table_l2 + 2*PAGE_SIZE + 0x01 - __PAGE_OFFSET, 0
+        .long compat_pg_table_l2 + 3*PAGE_SIZE + 0x01 - __PAGE_OFFSET, 0
 
         .align 4096,0
 
@@ -123,4 +123,7 @@ compat_pg_table_l2:
         .endif
         .endm
 
-        identmap
+        identmap 0x00000000
+        identmap 0x40000000
+        identmap 0x80000000
+        identmap 0xc0000000

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