LXR linux/arch/x86/include/asm/nmi.h

   1/* SPDX-License-Identifier: GPL-2.0 */
   2#ifndef _ASM_X86_NMI_H
   3#define _ASM_X86_NMI_H
   4
   5#include <linux/irq_work.h>
   6#include <linux/pm.h>
   7#include <asm/irq.h>
   8#include <asm/io.h>
   9
  10#ifdef CONFIG_X86_LOCAL_APIC
  11
  12extern int avail_to_resrv_perfctr_nmi_bit(unsigned int);
  13extern int reserve_perfctr_nmi(unsigned int);
  14extern void release_perfctr_nmi(unsigned int);
  15extern int reserve_evntsel_nmi(unsigned int);
  16extern void release_evntsel_nmi(unsigned int);
  17
  18struct ctl_table;
  19extern int proc_nmi_enabled(struct ctl_table *, int ,
  20                        void __user *, size_t *, loff_t *);
  21extern int unknown_nmi_panic;
  22
  23#endif /* CONFIG_X86_LOCAL_APIC */
  24
  25#define NMI_FLAG_FIRST  1
  26
  27enum {
  28        NMI_LOCAL=0,
  29        NMI_UNKNOWN,
  30        NMI_SERR,
  31        NMI_IO_CHECK,
  32        NMI_MAX
  33};
  34
  35#define NMI_DONE        0
  36#define NMI_HANDLED     1
  37
  38typedef int (*nmi_handler_t)(unsigned int, struct pt_regs *);
  39
  40struct nmiaction {
  41        struct list_head        list;
  42        nmi_handler_t           handler;
  43        u64                     max_duration;
  44        unsigned long           flags;
  45        const char              *name;
  46};
  47
  48#define register_nmi_handler(t, fn, fg, n, init...)     \
  49({                                                      \
  50        static struct nmiaction init fn##_na = {        \
  51                .handler = (fn),                        \
  52                .name = (n),                            \
  53                .flags = (fg),                          \
  54        };                                              \
  55        __register_nmi_handler((t), &fn##_na);          \
  56})
  57
  58int __register_nmi_handler(unsigned int, struct nmiaction *);
  59
  60void unregister_nmi_handler(unsigned int, const char *);
  61
  62void stop_nmi(void);
  63void restart_nmi(void);
  64void local_touch_nmi(void);
  65
  66#endif /* _ASM_X86_NMI_H */
  67