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
  12 extern int reserve_perfctr_nmi(unsigned int);
  13 extern void release_perfctr_nmi(unsigned int);
  14 extern int reserve_evntsel_nmi(unsigned int);
  15 extern void release_evntsel_nmi(unsigned int);
  16
  17 extern int unknown_nmi_panic;
  18
  19 #endif /* CONFIG_X86_LOCAL_APIC */
  20
  21 #define NMI_FLAG_FIRST  1
  22
  23 enum {
  24         NMI_LOCAL=0,
  25         NMI_UNKNOWN,
  26         NMI_SERR,
  27         NMI_IO_CHECK,
  28         NMI_MAX
  29 };
  30
  31 #define NMI_DONE        0
  32 #define NMI_HANDLED     1
  33
  34 typedef int (*nmi_handler_t)(unsigned int, struct pt_regs *);
  35
  36 struct nmiaction {
  37         struct list_head        list;
  38         nmi_handler_t           handler;
  39         u64                     max_duration;
  40         unsigned long           flags;
  41         const char              *name;
  42 };
  43
  44 #define register_nmi_handler(t, fn, fg, n, init...)     \
  45 ({                                                      \
  46         static struct nmiaction init fn##_na = {        \
  47                 .list = LIST_HEAD_INIT(fn##_na.list),   \
  48                 .handler = (fn),                        \
  49                 .name = (n),                            \
  50                 .flags = (fg),                          \
  51         };                                              \
  52         __register_nmi_handler((t), &fn##_na);          \
  53 })
  54
  55 int __register_nmi_handler(unsigned int, struct nmiaction *);
  56
  57 void unregister_nmi_handler(unsigned int, const char *);
  58
  59 void stop_nmi(void);
  60 void restart_nmi(void);
  61 void local_touch_nmi(void);
  62
  63 #endif /* _ASM_X86_NMI_H */