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x86, cpu: Convert F00F bug detection 

... to using the new facility and drop the cpuinfo_x86 member.

Signed-off-by: Borislav Petkov <bp@suse.de>
Link: http://lkml.kernel.org/r/1363788448-31325-3-git-send-email-bp@alien8.de
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
hifive-unleashed-5.1
Borislav Petkov 2013-03-20 15:07:24 +01:00 committed by H. Peter Anvin
parent 65fc985b37
commit e2604b49e8
5 changed files with 6 additions and 5 deletions
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2
arch/x86/include/asm/cpufeature.h
View File

@ -222,6 +222,8 @@
*/
#define X86_BUG(x) (NCAPINTS*32 + (x))
#define X86_BUG_F00F X86_BUG(0) /* Intel F00F */
#if defined(__KERNEL__) && !defined(__ASSEMBLY__)
#include <asm/asm.h>

1
arch/x86/include/asm/processor.h
View File

@ -92,7 +92,6 @@ struct cpuinfo_x86 {
char hard_math;
char rfu;
char fdiv_bug;
char f00f_bug;
char coma_bug;
char pad0;
#else

4
arch/x86/kernel/cpu/intel.c
View File

@ -209,11 +209,11 @@ static void __cpuinit intel_workarounds(struct cpuinfo_x86 *c)
* system.
* Note that the workaround only should be initialized once...
*/
c->f00f_bug = 0;
clear_cpu_bug(c, X86_BUG_F00F);
if (!paravirt_enabled() && c->x86 == 5) {
static int f00f_workaround_enabled;
c->f00f_bug = 1;
set_cpu_bug(c, X86_BUG_F00F);
if (!f00f_workaround_enabled) {
trap_init_f00f_bug();
printk(KERN_NOTICE "Intel Pentium with F0 0F bug - workaround enabled.\n");

2
arch/x86/kernel/cpu/proc.c
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@ -35,7 +35,7 @@ static void show_cpuinfo_misc(struct seq_file *m, struct cpuinfo_x86 *c)
"cpuid level\t: %d\n"
"wp\t\t: %s\n",
c->fdiv_bug ? "yes" : "no",
c->f00f_bug ? "yes" : "no",
static_cpu_has_bug(X86_BUG_F00F) ? "yes" : "no",
c->coma_bug ? "yes" : "no",
c->hard_math ? "yes" : "no",
c->hard_math ? "yes" : "no",

2
arch/x86/mm/fault.c
View File

@ -555,7 +555,7 @@ static int is_f00f_bug(struct pt_regs *regs, unsigned long address)
/*
* Pentium F0 0F C7 C8 bug workaround:
*/
if (boot_cpu_data.f00f_bug) {
if (boot_cpu_has_bug(X86_BUG_F00F)) {
nr = (address - idt_descr.address) >> 3;
if (nr == 6) {