1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _ASM_X86_NMI_H 3 #define _ASM_X86_NMI_H 4 5 #include <linux/irq_work.h> 6 #include <linux/pm.h> 7 #include <asm/irq.h> 8 #include <asm/io.h> 9 10 #ifdef CONFIG_X86_LOCAL_APIC 11 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 unsigned long flags; 44 const char *name; 45 }; 46 47 #define register_nmi_handler(t, fn, fg, n, init...) \ 48 ({ \ 49 static struct nmiaction init fn##_na = { \ 50 .handler = (fn), \ 51 .name = (n), \ 52 .flags = (fg), \ 53 }; \ 54 __register_nmi_handler((t), &fn##_na); \ 55 }) 56 57 int __register_nmi_handler(unsigned int, struct nmiaction *); 58 59 void unregister_nmi_handler(unsigned int, const char *); 60 61 void stop_nmi(void); 62 void restart_nmi(void); 63 void local_touch_nmi(void); 64 65 #endif /* _ASM_X86_NMI_H */ 66