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 extern int unknown_nmi_panic; 18 19 #endif /* CONFIG_X86_LOCAL_APIC */ 20 21 #define NMI_FLAG_FIRST 1 22 23 enum { 24 NMI_LOCAL=0, 25 NMI_UNKNOWN, 26 NMI_SERR, 27 NMI_IO_CHECK, 28 NMI_MAX 29 }; 30 31 #define NMI_DONE 0 32 #define NMI_HANDLED 1 33 34 typedef int (*nmi_handler_t)(unsigned int, struct pt_regs *); 35 36 struct nmiaction { 37 struct list_head list; 38 nmi_handler_t handler; 39 u64 max_duration; 40 unsigned long flags; 41 const char *name; 42 }; 43 44 #define register_nmi_handler(t, fn, fg, n, init...) \ 45 ({ \ 46 static struct nmiaction init fn##_na = { \ 47 .list = LIST_HEAD_INIT(fn##_na.list), \ 48 .handler = (fn), \ 49 .name = (n), \ 50 .flags = (fg), \ 51 }; \ 52 __register_nmi_handler((t), &fn##_na); \ 53 }) 54 55 int __register_nmi_handler(unsigned int, struct nmiaction *); 56 57 void unregister_nmi_handler(unsigned int, const char *); 58 59 void stop_nmi(void); 60 void restart_nmi(void); 61 void local_touch_nmi(void); 62 63 #endif /* _ASM_X86_NMI_H */ 64