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 18#ifdef CONFIG_SMP 19extern unsigned int sysctl_oops_all_cpu_backtrace; 20#else 21#define sysctl_oops_all_cpu_backtrace 0 22#endif /* CONFIG_SMP */ 23 24extern int panic_timeout; 25extern unsigned long panic_print; 26extern int panic_on_oops; 27extern int panic_on_unrecovered_nmi; 28extern int panic_on_io_nmi; 29extern int panic_on_warn; 30 31extern unsigned long panic_on_taint; 32extern bool panic_on_taint_nousertaint; 33 34extern int sysctl_panic_on_rcu_stall; 35extern int sysctl_max_rcu_stall_to_panic; 36extern int sysctl_panic_on_stackoverflow; 37 38extern bool crash_kexec_post_notifiers; 39 40/* 41 * panic_cpu is used for synchronizing panic() and crash_kexec() execution. It 42 * holds a CPU number which is executing panic() currently. A value of 43 * PANIC_CPU_INVALID means no CPU has entered panic() or crash_kexec(). 44 */ 45extern atomic_t panic_cpu; 46#define PANIC_CPU_INVALID -1 47 48/* 49 * Only to be used by arch init code. If the user over-wrote the default 50 * CONFIG_PANIC_TIMEOUT, honor it. 51 */ 52static inline void set_arch_panic_timeout(int timeout, int arch_default_timeout) 53{ 54 if (panic_timeout == arch_default_timeout) 55 panic_timeout = timeout; 56} 57 58/* This cannot be an enum because some may be used in assembly source. */ 59#define TAINT_PROPRIETARY_MODULE 0 60#define TAINT_FORCED_MODULE 1 61#define TAINT_CPU_OUT_OF_SPEC 2 62#define TAINT_FORCED_RMMOD 3 63#define TAINT_MACHINE_CHECK 4 64#define TAINT_BAD_PAGE 5 65#define TAINT_USER 6 66#define TAINT_DIE 7 67#define TAINT_OVERRIDDEN_ACPI_TABLE 8 68#define TAINT_WARN 9 69#define TAINT_CRAP 10 70#define TAINT_FIRMWARE_WORKAROUND 11 71#define TAINT_OOT_MODULE 12 72#define TAINT_UNSIGNED_MODULE 13 73#define TAINT_SOFTLOCKUP 14 74#define TAINT_LIVEPATCH 15 75#define TAINT_AUX 16 76#define TAINT_RANDSTRUCT 17 77#define TAINT_FLAGS_COUNT 18 78#define TAINT_FLAGS_MAX ((1UL << TAINT_FLAGS_COUNT) - 1) 79 80struct taint_flag { 81 char c_true; /* character printed when tainted */ 82 char c_false; /* character printed when not tainted */ 83 bool module; /* also show as a per-module taint flag */ 84}; 85 86extern const struct taint_flag taint_flags[TAINT_FLAGS_COUNT]; 87 88enum lockdep_ok { 89 LOCKDEP_STILL_OK, 90 LOCKDEP_NOW_UNRELIABLE, 91}; 92 93extern const char *print_tainted(void); 94extern void add_taint(unsigned flag, enum lockdep_ok); 95extern int test_taint(unsigned flag); 96extern unsigned long get_taint(void); 97 98#endif /* _LINUX_PANIC_H */ 99