1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _LINUX_TRACE_H 3 #define _LINUX_TRACE_H 4 5 #ifdef CONFIG_TRACING 6 7 #define TRACE_EXPORT_FUNCTION BIT(0) 8 #define TRACE_EXPORT_EVENT BIT(1) 9 #define TRACE_EXPORT_MARKER BIT(2) 10 11 /* 12 * The trace export - an export of Ftrace output. The trace_export 13 * can process traces and export them to a registered destination as 14 * an addition to the current only output of Ftrace - i.e. ring buffer. 15 * 16 * If you want traces to be sent to some other place rather than ring 17 * buffer only, just need to register a new trace_export and implement 18 * its own .write() function for writing traces to the storage. 19 * 20 * next - pointer to the next trace_export 21 * write - copy traces which have been delt with ->commit() to 22 * the destination 23 * flags - which ftrace to be exported 24 */ 25 struct trace_export { 26 struct trace_export __rcu *next; 27 void (*write)(struct trace_export *, const void *, unsigned int); 28 int flags; 29 }; 30 31 int register_ftrace_export(struct trace_export *export); 32 int unregister_ftrace_export(struct trace_export *export); 33 34 struct trace_array; 35 36 void trace_printk_init_buffers(void); 37 __printf(3, 4) 38 int trace_array_printk(struct trace_array *tr, unsigned long ip, 39 const char *fmt, ...); 40 int trace_array_init_printk(struct trace_array *tr); 41 void trace_array_put(struct trace_array *tr); 42 struct trace_array *trace_array_get_by_name(const char *name); 43 int trace_array_destroy(struct trace_array *tr); 44 45 /* For osnoise tracer */ 46 int osnoise_arch_register(void); 47 void osnoise_arch_unregister(void); 48 void osnoise_trace_irq_entry(int id); 49 void osnoise_trace_irq_exit(int id, const char *desc); 50 51 #endif /* CONFIG_TRACING */ 52 53 #endif /* _LINUX_TRACE_H */ 54