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_X86_64
  19 extern void default_do_nmi(struct pt_regs *);
  20 #endif
  21
  22 extern void die_nmi(char *str, struct pt_regs *regs, int do_panic);
  23 extern int check_nmi_watchdog(void);
  24 extern int nmi_watchdog_enabled;
  25 extern int avail_to_resrv_perfctr_nmi_bit(unsigned int);
  26 extern int avail_to_resrv_perfctr_nmi(unsigned int);
  27 extern int reserve_perfctr_nmi(unsigned int);
  28 extern void release_perfctr_nmi(unsigned int);
  29 extern int reserve_evntsel_nmi(unsigned int);
  30 extern void release_evntsel_nmi(unsigned int);
  31
  32 extern void setup_apic_nmi_watchdog(void *);
  33 extern void stop_apic_nmi_watchdog(void *);
  34 extern void disable_timer_nmi_watchdog(void);
  35 extern void enable_timer_nmi_watchdog(void);
  36 extern int nmi_watchdog_tick(struct pt_regs *regs, unsigned reason);
  37
  38 extern atomic_t nmi_active;
  39 extern unsigned int nmi_watchdog;
  40 #define NMI_NONE        0
  41 #define NMI_IO_APIC     1
  42 #define NMI_LOCAL_APIC  2
  43 #define NMI_INVALID     3
  44
  45 struct ctl_table;
  46 struct file;
  47 extern int proc_nmi_enabled(struct ctl_table *, int , struct file *,
  48                         void __user *, size_t *, loff_t *);
  49 extern int unknown_nmi_panic;
  50
  51 void __trigger_all_cpu_backtrace(void);
  52 #define trigger_all_cpu_backtrace() __trigger_all_cpu_backtrace()
  53
  54 static inline void localise_nmi_watchdog(void)
  55 {
  56         if (nmi_watchdog == NMI_IO_APIC)
  57                 nmi_watchdog = NMI_LOCAL_APIC;
  58 }
  59
  60 /* check if nmi_watchdog is active (ie was specified at boot) */
  61 static inline int nmi_watchdog_active(void)
  62 {
  63         /*
  64          * actually it should be:
  65          *      return (nmi_watchdog == NMI_LOCAL_APIC ||
  66          *              nmi_watchdog == NMI_IO_APIC)
  67          * but since they are power of two we could use a
  68          * cheaper way --cvg
  69          */
  70         return nmi_watchdog & 0x3;
  71 }
  72 #endif
  73
  74 void lapic_watchdog_stop(void);
  75 int lapic_watchdog_init(unsigned nmi_hz);
  76 int lapic_wd_event(unsigned nmi_hz);
  77 unsigned lapic_adjust_nmi_hz(unsigned hz);
  78 int lapic_watchdog_ok(void);
  79 void disable_lapic_nmi_watchdog(void);
  80 void enable_lapic_nmi_watchdog(void);
  81 void stop_nmi(void);
  82 void restart_nmi(void);
  83
  84 #endif