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 12extern int reserve_perfctr_nmi(unsigned int); 13extern void release_perfctr_nmi(unsigned int); 14extern int reserve_evntsel_nmi(unsigned int); 15extern void release_evntsel_nmi(unsigned int); 16 17extern int unknown_nmi_panic; 18 19#endif /* CONFIG_X86_LOCAL_APIC */ 20 21#define NMI_FLAG_FIRST 1 22 23enum { 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 34typedef int (*nmi_handler_t)(unsigned int, struct pt_regs *); 35 36struct 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 55int __register_nmi_handler(unsigned int, struct nmiaction *); 56 57void unregister_nmi_handler(unsigned int, const char *); 58 59void stop_nmi(void); 60void restart_nmi(void); 61void local_touch_nmi(void); 62 63#endif /* _ASM_X86_NMI_H */ 64