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 avail_to_resrv_perfctr_nmi_bit(unsigned int); 13extern int reserve_perfctr_nmi(unsigned int); 14extern void release_perfctr_nmi(unsigned int); 15extern int reserve_evntsel_nmi(unsigned int); 16extern void release_evntsel_nmi(unsigned int); 17 18struct ctl_table; 19extern int proc_nmi_enabled(struct ctl_table *, int , 20 void __user *, size_t *, loff_t *); 21extern int unknown_nmi_panic; 22 23#endif /* CONFIG_X86_LOCAL_APIC */ 24 25#define NMI_FLAG_FIRST 1 26 27enum { 28 NMI_LOCAL=0, 29 NMI_UNKNOWN, 30 NMI_SERR, 31 NMI_IO_CHECK, 32 NMI_MAX 33}; 34 35#define NMI_DONE 0 36#define NMI_HANDLED 1 37 38typedef int (*nmi_handler_t)(unsigned int, struct pt_regs *); 39 40struct nmiaction { 41 struct list_head list; 42 nmi_handler_t handler; 43 u64 max_duration; 44 unsigned long flags; 45 const char *name; 46}; 47 48#define register_nmi_handler(t, fn, fg, n, init...) \ 49({ \ 50 static struct nmiaction init fn##_na = { \ 51 .handler = (fn), \ 52 .name = (n), \ 53 .flags = (fg), \ 54 }; \ 55 __register_nmi_handler((t), &fn##_na); \ 56}) 57 58int __register_nmi_handler(unsigned int, struct nmiaction *); 59 60void unregister_nmi_handler(unsigned int, const char *); 61 62void stop_nmi(void); 63void restart_nmi(void); 64void local_touch_nmi(void); 65 66#endif /* _ASM_X86_NMI_H */ 67