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 8 struct pt_regs; 9 10 extern long (*panic_blink)(int state); 11 __printf(1, 2) 12 void panic(const char *fmt, ...) __noreturn __cold; 13 void nmi_panic(struct pt_regs *regs, const char *msg); 14 extern void oops_enter(void); 15 extern void oops_exit(void); 16 extern bool oops_may_print(void); 17 18 #ifdef CONFIG_SMP 19 extern unsigned int sysctl_oops_all_cpu_backtrace; 20 #else 21 #define sysctl_oops_all_cpu_backtrace 0 22 #endif /* CONFIG_SMP */ 23 24 extern int panic_timeout; 25 extern unsigned long panic_print; 26 extern int panic_on_oops; 27 extern int panic_on_unrecovered_nmi; 28 extern int panic_on_io_nmi; 29 extern int panic_on_warn; 30 31 extern unsigned long panic_on_taint; 32 extern bool panic_on_taint_nousertaint; 33 34 extern int sysctl_panic_on_rcu_stall; 35 extern int sysctl_max_rcu_stall_to_panic; 36 extern int sysctl_panic_on_stackoverflow; 37 38 extern 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 */ 45 extern 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 */ set_arch_panic_timeout(int timeout,int arch_default_timeout)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 80 struct 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 86 extern const struct taint_flag taint_flags[TAINT_FLAGS_COUNT]; 87 88 enum lockdep_ok { 89 LOCKDEP_STILL_OK, 90 LOCKDEP_NOW_UNRELIABLE, 91 }; 92 93 extern const char *print_tainted(void); 94 extern void add_taint(unsigned flag, enum lockdep_ok); 95 extern int test_taint(unsigned flag); 96 extern unsigned long get_taint(void); 97 98 #endif /* _LINUX_PANIC_H */ 99