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