arch/x86/include/asm/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 CONFIG_X86_LOCAL_APIC
   9
  10 extern int avail_to_resrv_perfctr_nmi_bit(unsigned int);
  11 extern int reserve_perfctr_nmi(unsigned int);
  12 extern void release_perfctr_nmi(unsigned int);
  13 extern int reserve_evntsel_nmi(unsigned int);
  14 extern void release_evntsel_nmi(unsigned int);
  15
  16 struct ctl_table;
  17 extern int proc_nmi_enabled(struct ctl_table *, int ,
  18                         void __user *, size_t *, loff_t *);
  19 extern int unknown_nmi_panic;
  20
  21 void arch_trigger_all_cpu_backtrace(void);
  22 #define arch_trigger_all_cpu_backtrace arch_trigger_all_cpu_backtrace
  23 #endif
  24
  25 /*
  26  * Define some priorities for the nmi notifier call chain.
  27  *
  28  * Create a local nmi bit that has a higher priority than
  29  * external nmis, because the local ones are more frequent.
  30  *
  31  * Also setup some default high/normal/low settings for
  32  * subsystems to registers with.  Using 4 bits to separate
  33  * the priorities.  This can go a lot higher if needed be.
  34  */
  35
  36 #define NMI_LOCAL_SHIFT         16      /* randomly picked */
  37 #define NMI_LOCAL_BIT           (1ULL << NMI_LOCAL_SHIFT)
  38 #define NMI_HIGH_PRIOR          (1ULL << 8)
  39 #define NMI_NORMAL_PRIOR        (1ULL << 4)
  40 #define NMI_LOW_PRIOR           (1ULL << 0)
  41 #define NMI_LOCAL_HIGH_PRIOR    (NMI_LOCAL_BIT | NMI_HIGH_PRIOR)
  42 #define NMI_LOCAL_NORMAL_PRIOR  (NMI_LOCAL_BIT | NMI_NORMAL_PRIOR)
  43 #define NMI_LOCAL_LOW_PRIOR     (NMI_LOCAL_BIT | NMI_LOW_PRIOR)
  44
  45 void stop_nmi(void);
  46 void restart_nmi(void);
  47
  48 #endif /* _ASM_X86_NMI_H */