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authorPekka Enberg <penberg@cs.helsinki.fi>2009-03-05 14:54:56 +0200
committerIngo Molnar <mingo@elte.hu>2009-03-05 14:17:12 +0100
commit54e63f3a4282a8bc5b39db29095f076ece2b1073 (patch)
tree105ebabc730cfeed7f27c3de5793d8d809501e90 /arch/x86
parente7179853e7552ba6631e2cdd9f5c374383403b4b (diff)
x86: ifdef 32-bit specific setup in init_memory_mapping()
Impact: cleanup Enabling NX, PSE, and PGE are only required on 32-bit so ifdef them in both versions of the function. Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi> Cc: Yinghai Lu <yinghai@kernel.org> LKML-Reference: <1236257708-27269-5-git-send-email-penberg@cs.helsinki.fi> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86')
-rw-r--r--arch/x86/mm/init_32.c2
-rw-r--r--arch/x86/mm/init_64.c18
2 files changed, 20 insertions, 0 deletions
diff --git a/arch/x86/mm/init_32.c b/arch/x86/mm/init_32.c
index cfc68d60138..eb98cb90cb3 100644
--- a/arch/x86/mm/init_32.c
+++ b/arch/x86/mm/init_32.c
@@ -948,6 +948,7 @@ unsigned long __init_refok init_memory_mapping(unsigned long start,
use_gbpages = direct_gbpages;
#endif
+#ifdef CONFIG_X86_32
#ifdef CONFIG_X86_PAE
set_nx();
if (nx_enabled)
@@ -963,6 +964,7 @@ unsigned long __init_refok init_memory_mapping(unsigned long start,
set_in_cr4(X86_CR4_PGE);
__supported_pte_mask |= _PAGE_GLOBAL;
}
+#endif
if (use_gbpages)
page_size_mask |= 1 << PG_LEVEL_1G;
diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c
index 151e5ba3441..c3c0be5b637 100644
--- a/arch/x86/mm/init_64.c
+++ b/arch/x86/mm/init_64.c
@@ -712,6 +712,24 @@ unsigned long __init_refok init_memory_mapping(unsigned long start,
use_gbpages = direct_gbpages;
#endif
+#ifdef CONFIG_X86_32
+#ifdef CONFIG_X86_PAE
+ set_nx();
+ if (nx_enabled)
+ printk(KERN_INFO "NX (Execute Disable) protection: active\n");
+#endif
+
+ /* Enable PSE if available */
+ if (cpu_has_pse)
+ set_in_cr4(X86_CR4_PSE);
+
+ /* Enable PGE if available */
+ if (cpu_has_pge) {
+ set_in_cr4(X86_CR4_PGE);
+ __supported_pte_mask |= _PAGE_GLOBAL;
+ }
+#endif
+
if (use_gbpages)
page_size_mask |= 1 << PG_LEVEL_1G;
if (use_pse)