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-rw-r--r--arch/x86/kernel/cpu/bugs_64.c33
1 files changed, 33 insertions, 0 deletions
diff --git a/arch/x86/kernel/cpu/bugs_64.c b/arch/x86/kernel/cpu/bugs_64.c
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@@ -0,0 +1,33 @@
1/*
2 * Copyright (C) 1994 Linus Torvalds
3 * Copyright (C) 2000 SuSE
4 */
5
6#include <linux/kernel.h>
7#include <linux/init.h>
8#include <asm/alternative.h>
9#include <asm/bugs.h>
10#include <asm/processor.h>
11#include <asm/mtrr.h>
12#include <asm/cacheflush.h>
13
14void __init check_bugs(void)
15{
16 identify_boot_cpu();
17#if !defined(CONFIG_SMP)
18 printk("CPU: ");
19 print_cpu_info(&boot_cpu_data);
20#endif
21 alternative_instructions();
22
23 /*
24 * Make sure the first 2MB area is not mapped by huge pages
25 * There are typically fixed size MTRRs in there and overlapping
26 * MTRRs into large pages causes slow downs.
27 *
28 * Right now we don't do that with gbpages because there seems
29 * very little benefit for that case.
30 */
31 if (!direct_gbpages)
32 set_memory_4k((unsigned long)__va(0), 1);
33}