[Xen-changelog] [xen-3.4-testing] x86: Relocate boot trampoline to avoid BIOS conflicts.

["Xen patchbot-3.4-testing" <patchbot-3.4-testing@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User Keir Fraser <keir.fraser@xxxxxxxxxx>
# Date 1273742878 -3600
# Node ID 86f06849415d7e76beef830f7d9586e5f5a17726
# Parent  c1c0a50dc98c70acbc20bea0f7f71a4a2a3a86a7
x86: Relocate boot trampoline to avoid BIOS conflicts.

Fix booting through iSCSI protocol with Broadcom network cards.

These boards use the option ROM feature to implement the TCP/IP stack
protocol, and the iSCSI software initiator. The memory address
normally used by the PMM is 0x87000 which conflicts with the memory
allocation for Xen's trampoline routine, currently 0x88000.

Relocating down to 0x7c000 fixes the problem.

Signed-off-by: Fabio Guarneri <fabioguarneri@xxxxxxxxx>
xen-unstable changeset:   21276:fd44f1c0d3d6
xen-unstable date:        Tue May 04 12:51:33 2010 +0100
---
 xen/include/asm-x86/config.h |    2 +-
 1 files changed, 1 insertion(+), 1 deletion(-)

diff -r c1c0a50dc98c -r 86f06849415d xen/include/asm-x86/config.h
--- a/xen/include/asm-x86/config.h      Tue May 11 08:42:30 2010 +0100
+++ b/xen/include/asm-x86/config.h      Thu May 13 10:27:58 2010 +0100
@@ -96,7 +96,7 @@
 /* Primary stack is restricted to 8kB by guard pages. */
 #define PRIMARY_STACK_SIZE 8192
 
-#define BOOT_TRAMPOLINE 0x88000
+#define BOOT_TRAMPOLINE 0x7c000
 #define bootsym_phys(sym)                                 \
     (((unsigned long)&(sym)-(unsigned long)&trampoline_start)+BOOT_TRAMPOLINE)
 #define bootsym(sym)                                      \

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