]>
git.proxmox.com Git - mirror_ubuntu-jammy-kernel.git/blob - arch/x86/kernel/cpu/mcheck/mce_32.c
2 * mce.c - x86 Machine Check Exception Reporting
3 * (c) 2002 Alan Cox <alan@lxorguk.ukuu.org.uk>, Dave Jones <davej@redhat.com>
6 #include <linux/init.h>
7 #include <linux/types.h>
8 #include <linux/kernel.h>
9 #include <linux/module.h>
10 #include <linux/smp.h>
11 #include <linux/thread_info.h>
13 #include <asm/processor.h>
14 #include <asm/system.h>
22 EXPORT_SYMBOL_GPL(nr_mce_banks
); /* non-fatal.o */
24 /* Handle unconfigured int18 (should never happen) */
25 static void unexpected_machine_check(struct pt_regs
*regs
, long error_code
)
27 printk(KERN_ERR
"CPU#%d: Unexpected int18 (Machine Check).\n", smp_processor_id());
30 /* Call the installed machine check handler for this CPU setup. */
31 void (*machine_check_vector
)(struct pt_regs
*, long error_code
) = unexpected_machine_check
;
33 /* This has to be run for each processor */
34 void mcheck_init(struct cpuinfo_x86
*c
)
36 if (mce_disabled
== 1)
39 switch (c
->x86_vendor
) {
44 case X86_VENDOR_INTEL
:
46 intel_p5_mcheck_init(c
);
48 intel_p6_mcheck_init(c
);
50 intel_p4_mcheck_init(c
);
53 case X86_VENDOR_CENTAUR
:
55 winchip_mcheck_init(c
);
63 static unsigned long old_cr4 __initdata
;
65 void __init
stop_mce(void)
68 clear_in_cr4(X86_CR4_MCE
);
71 void __init
restart_mce(void)
73 if (old_cr4
& X86_CR4_MCE
)
74 set_in_cr4(X86_CR4_MCE
);
77 static int __init
mcheck_disable(char *str
)
83 static int __init
mcheck_enable(char *str
)
89 __setup("nomce", mcheck_disable
);
90 __setup("mce", mcheck_enable
);