include/asm-x86/nmi.h

   1 #ifndef _ASM_X86_NMI_H_
   2 #define _ASM_X86_NMI_H_
   3
   4 #include <linux/pm.h>
   5 #include <asm/irq.h>
   6 #include <asm/io.h>
   7
   8 #ifdef ARCH_HAS_NMI_WATCHDOG
   9
  10 /**
  11  * do_nmi_callback
  12  *
  13  * Check to see if a callback exists and execute it.  Return 1
  14  * if the handler exists and was handled successfully.
  15  */
  16 int do_nmi_callback(struct pt_regs *regs, int cpu);
  17
  18 #ifdef CONFIG_PM
  19
  20 /** Replace the PM callback routine for NMI. */
  21 struct pm_dev *set_nmi_pm_callback(pm_callback callback);
  22
  23 /** Unset the PM callback routine back to the default. */
  24 void unset_nmi_pm_callback(struct pm_dev *dev);
  25
  26 #else
  27
  28 static inline struct pm_dev *set_nmi_pm_callback(pm_callback callback)
  29 {
  30         return 0;
  31 }
  32
  33 static inline void unset_nmi_pm_callback(struct pm_dev *dev)
  34 {
  35 }
  36
  37 #endif /* CONFIG_PM */
  38
  39 #ifdef CONFIG_X86_64
  40 extern void default_do_nmi(struct pt_regs *);
  41 extern void nmi_watchdog_default(void);
  42 #else
  43 #define nmi_watchdog_default(void) do {} while (0)
  44 #endif
  45
  46 extern void die_nmi(char *str, struct pt_regs *regs, int do_panic);
  47 extern int check_nmi_watchdog(void);
  48 extern int nmi_watchdog_enabled;
  49 extern int avail_to_resrv_perfctr_nmi_bit(unsigned int);
  50 extern int avail_to_resrv_perfctr_nmi(unsigned int);
  51 extern int reserve_perfctr_nmi(unsigned int);
  52 extern void release_perfctr_nmi(unsigned int);
  53 extern int reserve_evntsel_nmi(unsigned int);
  54 extern void release_evntsel_nmi(unsigned int);
  55
  56 extern void setup_apic_nmi_watchdog(void *);
  57 extern void stop_apic_nmi_watchdog(void *);
  58 extern void disable_timer_nmi_watchdog(void);
  59 extern void enable_timer_nmi_watchdog(void);
  60 extern int nmi_watchdog_tick(struct pt_regs *regs, unsigned reason);
  61
  62 extern atomic_t nmi_active;
  63 extern unsigned int nmi_watchdog;
  64 #define NMI_DISABLED    -1
  65 #define NMI_NONE        0
  66 #define NMI_IO_APIC     1
  67 #define NMI_LOCAL_APIC  2
  68 #define NMI_INVALID     3
  69 #define NMI_DEFAULT     NMI_DISABLED
  70
  71 struct ctl_table;
  72 struct file;
  73 extern int proc_nmi_enabled(struct ctl_table *, int , struct file *,
  74                         void __user *, size_t *, loff_t *);
  75 extern int unknown_nmi_panic;
  76
  77 void __trigger_all_cpu_backtrace(void);
  78 #define trigger_all_cpu_backtrace() __trigger_all_cpu_backtrace()
  79
  80 #endif
  81
  82 void lapic_watchdog_stop(void);
  83 int lapic_watchdog_init(unsigned nmi_hz);
  84 int lapic_wd_event(unsigned nmi_hz);
  85 unsigned lapic_adjust_nmi_hz(unsigned hz);
  86 int lapic_watchdog_ok(void);
  87 void disable_lapic_nmi_watchdog(void);
  88 void enable_lapic_nmi_watchdog(void);
  89 void stop_nmi(void);
  90 void restart_nmi(void);
  91
  92 #endif