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