[deliverable/linux.git] / arch / x86 / kernel / cpu / bugs_64.c

/*
 *  Copyright (C) 1994  Linus Torvalds
 *  Copyright (C) 2000  SuSE
 */

#include <linux/kernel.h>
#include <linux/init.h>
#include <asm/alternative.h>
#include <asm/bugs.h>
#include <asm/processor.h>
#include <asm/mtrr.h>
#include <asm/cacheflush.h>

void __init check_bugs(void)
{
	identify_boot_cpu();
#if !defined(CONFIG_SMP)
	pr_info("CPU: ");
	print_cpu_info(&boot_cpu_data);
#endif
	alternative_instructions();

	/*
	 * Make sure the first 2MB area is not mapped by huge pages
	 * There are typically fixed size MTRRs in there and overlapping
	 * MTRRs into large pages causes slow downs.
	 *
	 * Right now we don't do that with gbpages because there seems
	 * very little benefit for that case.
	 */
	if (!direct_gbpages)
		set_memory_4k((unsigned long)__va(0), 1);
}
Commit	Line	Data
c169859d	1	/*
c169859d JF	2	* Copyright (C) 1994 Linus Torvalds
c169859d JF	3	* Copyright (C) 2000 SuSE
c169859d JF	4	*/
	5
	6	#include <linux/kernel.h>
57decbda	7	#include <linux/init.h>
c169859d	8	#include <asm/alternative.h>
dd22a682	9	#include <asm/bugs.h>
c169859d	10	#include <asm/processor.h>
0a203a4c	11	#include <asm/mtrr.h>
f5c24a7f	12	#include <asm/cacheflush.h>
c169859d JF	13
	14	void __init check_bugs(void)
	15	{
5745abfe	16	identify_boot_cpu();
c169859d	17	#if !defined(CONFIG_SMP)
1b74dde7	18	pr_info("CPU: ");
c169859d JF	19	print_cpu_info(&boot_cpu_data);
	20	#endif
	21	alternative_instructions();
f5c24a7f AK	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);
c169859d	33	}