Linux-libre 5.4.48-gnu
[librecmc/linux-libre.git] / arch / x86 / include / asm / nmi.h
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 avail_to_resrv_perfctr_nmi_bit(unsigned int);
13 extern int reserve_perfctr_nmi(unsigned int);
14 extern void release_perfctr_nmi(unsigned int);
15 extern int reserve_evntsel_nmi(unsigned int);
16 extern void release_evntsel_nmi(unsigned int);
17
18 struct ctl_table;
19 extern int proc_nmi_enabled(struct ctl_table *, int ,
20                         void __user *, size_t *, loff_t *);
21 extern int unknown_nmi_panic;
22
23 #endif /* CONFIG_X86_LOCAL_APIC */
24
25 #define NMI_FLAG_FIRST  1
26
27 enum {
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
38 typedef int (*nmi_handler_t)(unsigned int, struct pt_regs *);
39
40 struct 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
58 int __register_nmi_handler(unsigned int, struct nmiaction *);
59
60 void unregister_nmi_handler(unsigned int, const char *);
61
62 void stop_nmi(void);
63 void restart_nmi(void);
64 void local_touch_nmi(void);
65
66 #endif /* _ASM_X86_NMI_H */