1f39650deSAndy Shevchenko /* SPDX-License-Identifier: GPL-2.0 */ 2f39650deSAndy Shevchenko #ifndef _LINUX_PANIC_H 3f39650deSAndy Shevchenko #define _LINUX_PANIC_H 4f39650deSAndy Shevchenko 5f39650deSAndy Shevchenko #include <linux/compiler_attributes.h> 6f39650deSAndy Shevchenko #include <linux/types.h> 7f39650deSAndy Shevchenko 8f39650deSAndy Shevchenko struct pt_regs; 9f39650deSAndy Shevchenko 10f39650deSAndy Shevchenko extern long (*panic_blink)(int state); 11f39650deSAndy Shevchenko __printf(1, 2) 12f39650deSAndy Shevchenko void panic(const char *fmt, ...) __noreturn __cold; 13f39650deSAndy Shevchenko void nmi_panic(struct pt_regs *regs, const char *msg); 1479cc1ba7SKees Cook void check_panic_on_warn(const char *origin); 15f39650deSAndy Shevchenko extern void oops_enter(void); 16f39650deSAndy Shevchenko extern void oops_exit(void); 17f39650deSAndy Shevchenko extern bool oops_may_print(void); 18f39650deSAndy Shevchenko 19f39650deSAndy Shevchenko extern int panic_timeout; 20f39650deSAndy Shevchenko extern unsigned long panic_print; 21f39650deSAndy Shevchenko extern int panic_on_oops; 22f39650deSAndy Shevchenko extern int panic_on_unrecovered_nmi; 23f39650deSAndy Shevchenko extern int panic_on_io_nmi; 24f39650deSAndy Shevchenko extern int panic_on_warn; 25f39650deSAndy Shevchenko 26f39650deSAndy Shevchenko extern unsigned long panic_on_taint; 27f39650deSAndy Shevchenko extern bool panic_on_taint_nousertaint; 28f39650deSAndy Shevchenko 29f39650deSAndy Shevchenko extern int sysctl_panic_on_rcu_stall; 30f39650deSAndy Shevchenko extern int sysctl_max_rcu_stall_to_panic; 31f39650deSAndy Shevchenko extern int sysctl_panic_on_stackoverflow; 32f39650deSAndy Shevchenko 33f39650deSAndy Shevchenko extern bool crash_kexec_post_notifiers; 34f39650deSAndy Shevchenko 35*d9cdb431SArnd Bergmann extern void __stack_chk_fail(void); 36*d9cdb431SArnd Bergmann void abort(void); 37*d9cdb431SArnd Bergmann 38f39650deSAndy Shevchenko /* 39f39650deSAndy Shevchenko * panic_cpu is used for synchronizing panic() and crash_kexec() execution. It 40f39650deSAndy Shevchenko * holds a CPU number which is executing panic() currently. A value of 41f39650deSAndy Shevchenko * PANIC_CPU_INVALID means no CPU has entered panic() or crash_kexec(). 42f39650deSAndy Shevchenko */ 43f39650deSAndy Shevchenko extern atomic_t panic_cpu; 44f39650deSAndy Shevchenko #define PANIC_CPU_INVALID -1 45f39650deSAndy Shevchenko 46f39650deSAndy Shevchenko /* 47f39650deSAndy Shevchenko * Only to be used by arch init code. If the user over-wrote the default 48f39650deSAndy Shevchenko * CONFIG_PANIC_TIMEOUT, honor it. 49f39650deSAndy Shevchenko */ 50f39650deSAndy Shevchenko static inline void set_arch_panic_timeout(int timeout, int arch_default_timeout) 51f39650deSAndy Shevchenko { 52f39650deSAndy Shevchenko if (panic_timeout == arch_default_timeout) 53f39650deSAndy Shevchenko panic_timeout = timeout; 54f39650deSAndy Shevchenko } 55f39650deSAndy Shevchenko 56f39650deSAndy Shevchenko /* This cannot be an enum because some may be used in assembly source. */ 57f39650deSAndy Shevchenko #define TAINT_PROPRIETARY_MODULE 0 58f39650deSAndy Shevchenko #define TAINT_FORCED_MODULE 1 59f39650deSAndy Shevchenko #define TAINT_CPU_OUT_OF_SPEC 2 60f39650deSAndy Shevchenko #define TAINT_FORCED_RMMOD 3 61f39650deSAndy Shevchenko #define TAINT_MACHINE_CHECK 4 62f39650deSAndy Shevchenko #define TAINT_BAD_PAGE 5 63f39650deSAndy Shevchenko #define TAINT_USER 6 64f39650deSAndy Shevchenko #define TAINT_DIE 7 65f39650deSAndy Shevchenko #define TAINT_OVERRIDDEN_ACPI_TABLE 8 66f39650deSAndy Shevchenko #define TAINT_WARN 9 67f39650deSAndy Shevchenko #define TAINT_CRAP 10 68f39650deSAndy Shevchenko #define TAINT_FIRMWARE_WORKAROUND 11 69f39650deSAndy Shevchenko #define TAINT_OOT_MODULE 12 70f39650deSAndy Shevchenko #define TAINT_UNSIGNED_MODULE 13 71f39650deSAndy Shevchenko #define TAINT_SOFTLOCKUP 14 72f39650deSAndy Shevchenko #define TAINT_LIVEPATCH 15 73f39650deSAndy Shevchenko #define TAINT_AUX 16 74f39650deSAndy Shevchenko #define TAINT_RANDSTRUCT 17 752852ca7fSDavid Gow #define TAINT_TEST 18 762852ca7fSDavid Gow #define TAINT_FLAGS_COUNT 19 77f39650deSAndy Shevchenko #define TAINT_FLAGS_MAX ((1UL << TAINT_FLAGS_COUNT) - 1) 78f39650deSAndy Shevchenko 79f39650deSAndy Shevchenko struct taint_flag { 80f39650deSAndy Shevchenko char c_true; /* character printed when tainted */ 81f39650deSAndy Shevchenko char c_false; /* character printed when not tainted */ 82f39650deSAndy Shevchenko bool module; /* also show as a per-module taint flag */ 83f39650deSAndy Shevchenko }; 84f39650deSAndy Shevchenko 85f39650deSAndy Shevchenko extern const struct taint_flag taint_flags[TAINT_FLAGS_COUNT]; 86f39650deSAndy Shevchenko 87f39650deSAndy Shevchenko enum lockdep_ok { 88f39650deSAndy Shevchenko LOCKDEP_STILL_OK, 89f39650deSAndy Shevchenko LOCKDEP_NOW_UNRELIABLE, 90f39650deSAndy Shevchenko }; 91f39650deSAndy Shevchenko 92f39650deSAndy Shevchenko extern const char *print_tainted(void); 93f39650deSAndy Shevchenko extern void add_taint(unsigned flag, enum lockdep_ok); 94f39650deSAndy Shevchenko extern int test_taint(unsigned flag); 95f39650deSAndy Shevchenko extern unsigned long get_taint(void); 96f39650deSAndy Shevchenko 97f39650deSAndy Shevchenko #endif /* _LINUX_PANIC_H */ 98