File: bugs.c

package info (click to toggle)
linux 4.9.25-1
  • links: PTS, VCS
  • area: main
  • in suites: stretch
  • size: 794,052 kB
  • ctags: 3,033,799
  • sloc: ansic: 14,481,780; asm: 287,385; makefile: 35,234; perl: 27,553; sh: 15,791; python: 13,364; cpp: 6,087; yacc: 4,337; lex: 2,439; awk: 1,212; pascal: 231; lisp: 218; sed: 21
file content (43 lines) | stat: -rw-r--r-- 1,055 bytes parent folder | download | duplicates (4)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
/*
 *  Copyright (C) 1994  Linus Torvalds
 *
 *  Cyrix stuff, June 1998 by:
 *	- Rafael R. Reilova (moved everything from head.S),
 *        <rreilova@ececs.uc.edu>
 *	- Channing Corn (tests & fixes),
 *	- Andrew D. Balsa (code cleanup).
 */
#include <linux/init.h>
#include <linux/utsname.h>
#include <asm/bugs.h>
#include <asm/processor.h>
#include <asm/processor-flags.h>
#include <asm/fpu/internal.h>
#include <asm/msr.h>
#include <asm/paravirt.h>
#include <asm/alternative.h>

void __init check_bugs(void)
{
	identify_boot_cpu();
#ifndef CONFIG_SMP
	pr_info("CPU: ");
	print_cpu_info(&boot_cpu_data);
#endif

	/*
	 * Check whether we are able to run this kernel safely on SMP.
	 *
	 * - i386 is no longer supported.
	 * - In order to run on anything without a TSC, we need to be
	 *   compiled for a i486.
	 */
	if (boot_cpu_data.x86 < 4)
		panic("Kernel requires i486+ for 'invlpg' and other features");

	init_utsname()->machine[1] =
		'0' + (boot_cpu_data.x86 > 6 ? 6 : boot_cpu_data.x86);
	alternative_instructions();

	fpu__init_check_bugs();
}