arch/x86/include/asm/nmi.h

   1 #ifndef _ASM_X86_NMI_H
   2 #define _ASM_X86_NMI_H
   3
   4 #include <linux/irq_work.h>
   5 #include <linux/pm.h>
   6 #include <asm/irq.h>
   7 #include <asm/io.h>
   8
   9 #ifdef CONFIG_X86_LOCAL_APIC
  10
  11 extern int avail_to_resrv_perfctr_nmi_bit(unsigned int);
  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 struct ctl_table;
  18 extern int proc_nmi_enabled(struct ctl_table *, int ,
  19                         void __user *, size_t *, loff_t *);
  20 extern int unknown_nmi_panic;
  21
  22 #endif /* CONFIG_X86_LOCAL_APIC */
  23
  24 #define NMI_FLAG_FIRST  1
  25
  26 enum {
  27         NMI_LOCAL=0,
  28         NMI_UNKNOWN,
  29         NMI_SERR,
  30         NMI_IO_CHECK,
  31         NMI_MAX
  32 };
  33
  34 #define NMI_DONE        0
  35 #define NMI_HANDLED     1
  36
  37 typedef int (*nmi_handler_t)(unsigned int, struct pt_regs *);
  38
  39 struct nmiaction {
  40         struct list_head        list;
  41         nmi_handler_t           handler;
  42         u64                     max_duration;
  43         struct irq_work         irq_work;
  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
  58 int __register_nmi_handler(unsigned int, struct nmiaction *);
  59
  60 void unregister_nmi_handler(unsigned int, const char *);
  61
  62 void stop_nmi(void);
  63 void restart_nmi(void);
  64 void local_touch_nmi(void);
  65
  66 #endif /* _ASM_X86_NMI_H */