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 extern void die_nmi(char *str, struct pt_regs *regs, int do_panic); 19 extern int check_nmi_watchdog(void); 20 #if !defined(CONFIG_LOCKUP_DETECTOR) 21 extern int nmi_watchdog_enabled; 22 #endif 23 extern int avail_to_resrv_perfctr_nmi_bit(unsigned int); 24 extern int reserve_perfctr_nmi(unsigned int); 25 extern void release_perfctr_nmi(unsigned int); 26 extern int reserve_evntsel_nmi(unsigned int); 27 extern void release_evntsel_nmi(unsigned int); 28 29 extern void setup_apic_nmi_watchdog(void *); 30 extern void stop_apic_nmi_watchdog(void *); 31 extern void disable_timer_nmi_watchdog(void); 32 extern void enable_timer_nmi_watchdog(void); 33 extern int nmi_watchdog_tick(struct pt_regs *regs, unsigned reason); 34 extern void cpu_nmi_set_wd_enabled(void); 35 36 extern atomic_t nmi_active; 37 extern unsigned int nmi_watchdog; 38 #define NMI_NONE 0 39 #define NMI_IO_APIC 1 40 #define NMI_LOCAL_APIC 2 41 #define NMI_INVALID 3 42 43 struct ctl_table; 44 extern int proc_nmi_enabled(struct ctl_table *, int , 45 void __user *, size_t *, loff_t *); 46 extern int unknown_nmi_panic; 47 48 void arch_trigger_all_cpu_backtrace(void); 49 #define arch_trigger_all_cpu_backtrace arch_trigger_all_cpu_backtrace 50 51 static inline void localise_nmi_watchdog(void) 52 { 53 if (nmi_watchdog == NMI_IO_APIC) 54 nmi_watchdog = NMI_LOCAL_APIC; 55 } 56 57 /* check if nmi_watchdog is active (ie was specified at boot) */ 58 static inline int nmi_watchdog_active(void) 59 { 60 /* 61 * actually it should be: 62 * return (nmi_watchdog == NMI_LOCAL_APIC || 63 * nmi_watchdog == NMI_IO_APIC) 64 * but since they are power of two we could use a 65 * cheaper way --cvg 66 */ 67 return nmi_watchdog & (NMI_LOCAL_APIC | NMI_IO_APIC); 68 } 69 #endif 70 71 void lapic_watchdog_stop(void); 72 int lapic_watchdog_init(unsigned nmi_hz); 73 int lapic_wd_event(unsigned nmi_hz); 74 unsigned lapic_adjust_nmi_hz(unsigned hz); 75 void disable_lapic_nmi_watchdog(void); 76 void enable_lapic_nmi_watchdog(void); 77 void stop_nmi(void); 78 void restart_nmi(void); 79 80 #endif /* _ASM_X86_NMI_H */ 81