linux/arch/x86/kernel/cpu/bugs_64.c

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/*
* 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)
printk("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);
}