root/arch/x86/include/asm/nmi.h

INCLUDED FROM

#ifndef _ASM_X86_NMI_H
#define _ASM_X86_NMI_H

#include <linux/irq_work.h>
#include <linux/pm.h>
#include <asm/irq.h>
#include <asm/io.h>

#ifdef CONFIG_X86_LOCAL_APIC

extern int avail_to_resrv_perfctr_nmi_bit(unsigned int);
extern int reserve_perfctr_nmi(unsigned int);
extern void release_perfctr_nmi(unsigned int);
extern int reserve_evntsel_nmi(unsigned int);
extern void release_evntsel_nmi(unsigned int);

struct ctl_table;
extern int proc_nmi_enabled(struct ctl_table *, int ,
                        void __user *, size_t *, loff_t *);
extern int unknown_nmi_panic;

#endif /* CONFIG_X86_LOCAL_APIC */

#define NMI_FLAG_FIRST  1

enum {
        NMI_LOCAL=0,
        NMI_UNKNOWN,
        NMI_SERR,
        NMI_IO_CHECK,
        NMI_MAX
};

#define NMI_DONE        0
#define NMI_HANDLED     1

typedef int (*nmi_handler_t)(unsigned int, struct pt_regs *);

struct nmiaction {
        struct list_head        list;
        nmi_handler_t           handler;
        u64                     max_duration;
        struct irq_work         irq_work;
        unsigned long           flags;
        const char              *name;
};

#define register_nmi_handler(t, fn, fg, n, init...)     \
({                                                      \
        static struct nmiaction init fn##_na = {        \
                .handler = (fn),                        \
                .name = (n),                            \
                .flags = (fg),                          \
        };                                              \
        __register_nmi_handler((t), &fn##_na);          \
})

int __register_nmi_handler(unsigned int, struct nmiaction *);

void unregister_nmi_handler(unsigned int, const char *);

void stop_nmi(void);
void restart_nmi(void);
void local_touch_nmi(void);

#endif /* _ASM_X86_NMI_H */