1
2
3
4
5
6#include <linux/init.h>
7#include <linux/types.h>
8#include <linux/kernel.h>
9#include <linux/interrupt.h>
10#include <linux/smp.h>
11
12#include <asm/processor.h>
13#include <asm/system.h>
14#include <asm/msr.h>
15
16#include "mce.h"
17
18
19static void pentium_machine_check(struct pt_regs *regs, long error_code)
20{
21 u32 loaddr, hi, lotype;
22 rdmsr(MSR_IA32_P5_MC_ADDR, loaddr, hi);
23 rdmsr(MSR_IA32_P5_MC_TYPE, lotype, hi);
24 printk(KERN_EMERG "CPU#%d: Machine Check Exception: 0x%8X (type 0x%8X).\n", smp_processor_id(), loaddr, lotype);
25 if (lotype&(1<<5))
26 printk(KERN_EMERG "CPU#%d: Possible thermal failure (CPU on fire ?).\n", smp_processor_id());
27 add_taint(TAINT_MACHINE_CHECK);
28}
29
30
31void intel_p5_mcheck_init(struct cpuinfo_x86 *c)
32{
33 u32 l, h;
34
35
36 if (!cpu_has(c, X86_FEATURE_MCE))
37 return;
38
39
40 if (mce_disabled != -1)
41 return;
42 machine_check_vector = pentium_machine_check;
43 wmb();
44
45
46 rdmsr(MSR_IA32_P5_MC_ADDR, l, h);
47 rdmsr(MSR_IA32_P5_MC_TYPE, l, h);
48 printk(KERN_INFO "Intel old style machine check architecture supported.\n");
49
50
51 set_in_cr4(X86_CR4_MCE);
52 printk(KERN_INFO "Intel old style machine check reporting enabled on CPU#%d.\n", smp_processor_id());
53}
54