[Xen-changelog] Fix PAE boot.

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

# HG changeset patch
# User kaf24@xxxxxxxxxxxxxxxxxxxx
# Node ID 4e0d8361a5383e9a95633352a0a0701093edc48a
# Parent  7733176cc821cf88e260bb18526b17b28575c8d9
Fix PAE boot.

Signed-off-by: Keir Fraser <keir@xxxxxxxxxxxxx>

diff -r 7733176cc821 -r 4e0d8361a538 Config.mk
--- a/Config.mk Sat Aug 20 09:38:32 2005
+++ b/Config.mk Sat Aug 20 10:01:20 2005
@@ -3,7 +3,7 @@
 # Currently supported architectures: x86_32, x86_64
 XEN_COMPILE_ARCH    ?= $(shell uname -m | sed -e s/i.86/x86_32/)
 XEN_TARGET_ARCH     ?= $(XEN_COMPILE_ARCH)
-XEN_TARGET_X86_PAE  ?= n
+XEN_TARGET_X86_PAE  ?= y
 
 # Tools to run on system hosting the build
 HOSTCC     = gcc
diff -r 7733176cc821 -r 4e0d8361a538 
linux-2.6-xen-sparse/arch/xen/i386/mm/init.c
--- a/linux-2.6-xen-sparse/arch/xen/i386/mm/init.c      Sat Aug 20 09:38:32 2005
+++ b/linux-2.6-xen-sparse/arch/xen/i386/mm/init.c      Sat Aug 20 10:01:20 2005
@@ -352,13 +352,6 @@
        swapper_pg_dir = pgd_base;
        init_mm.pgd    = pgd_base;
 
-#ifdef CONFIG_X86_PAE
-       int i;
-       /* Init entries of the first-level page table to the zero page */
-       for (i = 0; i < PTRS_PER_PGD; i++)
-               set_pgd(pgd_base + i, __pgd(__pa(empty_zero_page) | 
_PAGE_PRESENT));
-#endif
-
        /* Enable PSE if available */
        if (cpu_has_pse) {
                set_in_cr4(X86_CR4_PSE);
@@ -383,17 +376,6 @@
        page_table_range_init(vaddr, 0, pgd_base);
 
        permanent_kmaps_init(pgd_base);
-
-#if 0 /* def CONFIG_X86_PAE */
-       /*
-        * Add low memory identity-mappings - SMP needs it when
-        * starting up on an AP from real-mode. In the non-PAE
-        * case we already have these mappings through head.S.
-        * All user-space mappings are explicitly cleared after
-        * SMP startup.
-        */
-       set_pgd(&pgd_base[0], pgd_base[USER_PTRS_PER_PGD]);
-#endif
 }
 
 #if defined(CONFIG_PM_DISK) || defined(CONFIG_SOFTWARE_SUSPEND)

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