1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _LINUX_PANIC_H
3#define _LINUX_PANIC_H
4
5#include <linux/compiler_attributes.h>
6#include <linux/types.h>
7
8struct pt_regs;
9
10extern long (*panic_blink)(int state);
11__printf(1, 2)
12void panic(const char *fmt, ...) __noreturn __cold;
13void nmi_panic(struct pt_regs *regs, const char *msg);
14void check_panic_on_warn(const char *origin);
15extern void oops_enter(void);
16extern void oops_exit(void);
17extern bool oops_may_print(void);
18
19extern int panic_timeout;
20extern unsigned long panic_print;
21extern int panic_on_oops;
22extern int panic_on_unrecovered_nmi;
23extern int panic_on_io_nmi;
24extern int panic_on_warn;
25
26extern unsigned long panic_on_taint;
27extern bool panic_on_taint_nousertaint;
28
29extern int sysctl_panic_on_rcu_stall;
30extern int sysctl_max_rcu_stall_to_panic;
31extern int sysctl_panic_on_stackoverflow;
32
33extern bool crash_kexec_post_notifiers;
34
35extern void __stack_chk_fail(void);
36void abort(void);
37
38/*
39 * panic_cpu is used for synchronizing panic() and crash_kexec() execution. It
40 * holds a CPU number which is executing panic() currently. A value of
41 * PANIC_CPU_INVALID means no CPU has entered panic() or crash_kexec().
42 */
43extern atomic_t panic_cpu;
44#define PANIC_CPU_INVALID	-1
45
46/*
47 * Only to be used by arch init code. If the user over-wrote the default
48 * CONFIG_PANIC_TIMEOUT, honor it.
49 */
50static inline void set_arch_panic_timeout(int timeout, int arch_default_timeout)
51{
52	if (panic_timeout == arch_default_timeout)
53		panic_timeout = timeout;
54}
55
56/* This cannot be an enum because some may be used in assembly source. */
57#define TAINT_PROPRIETARY_MODULE	0
58#define TAINT_FORCED_MODULE		1
59#define TAINT_CPU_OUT_OF_SPEC		2
60#define TAINT_FORCED_RMMOD		3
61#define TAINT_MACHINE_CHECK		4
62#define TAINT_BAD_PAGE			5
63#define TAINT_USER			6
64#define TAINT_DIE			7
65#define TAINT_OVERRIDDEN_ACPI_TABLE	8
66#define TAINT_WARN			9
67#define TAINT_CRAP			10
68#define TAINT_FIRMWARE_WORKAROUND	11
69#define TAINT_OOT_MODULE		12
70#define TAINT_UNSIGNED_MODULE		13
71#define TAINT_SOFTLOCKUP		14
72#define TAINT_LIVEPATCH			15
73#define TAINT_AUX			16
74#define TAINT_RANDSTRUCT		17
75#define TAINT_TEST			18
76#define TAINT_FLAGS_COUNT		19
77#define TAINT_FLAGS_MAX			((1UL << TAINT_FLAGS_COUNT) - 1)
78
79struct taint_flag {
80	char c_true;	/* character printed when tainted */
81	char c_false;	/* character printed when not tainted */
82	bool module;	/* also show as a per-module taint flag */
83};
84
85extern const struct taint_flag taint_flags[TAINT_FLAGS_COUNT];
86
87enum lockdep_ok {
88	LOCKDEP_STILL_OK,
89	LOCKDEP_NOW_UNRELIABLE,
90};
91
92extern const char *print_tainted(void);
93extern void add_taint(unsigned flag, enum lockdep_ok);
94extern int test_taint(unsigned flag);
95extern unsigned long get_taint(void);
96
97#endif	/* _LINUX_PANIC_H */
98