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