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 extern int panic_timeout; 19 extern unsigned long panic_print; 20 extern int panic_on_oops; 21 extern int panic_on_unrecovered_nmi; 22 extern int panic_on_io_nmi; 23 extern int panic_on_warn; 24 25 extern unsigned long panic_on_taint; 26 extern bool panic_on_taint_nousertaint; 27 28 extern int sysctl_panic_on_rcu_stall; 29 extern int sysctl_max_rcu_stall_to_panic; 30 extern int sysctl_panic_on_stackoverflow; 31 32 extern 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 */ 39 extern 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 */ 46 static 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 75 struct 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 81 extern const struct taint_flag taint_flags[TAINT_FLAGS_COUNT]; 82 83 enum lockdep_ok { 84 LOCKDEP_STILL_OK, 85 LOCKDEP_NOW_UNRELIABLE, 86 }; 87 88 extern const char *print_tainted(void); 89 extern void add_taint(unsigned flag, enum lockdep_ok); 90 extern int test_taint(unsigned flag); 91 extern unsigned long get_taint(void); 92 93 #endif /* _LINUX_PANIC_H */ 94