1b2441318SGreg Kroah-Hartman /* SPDX-License-Identifier: GPL-2.0 */ 2478409ddSChunyan Zhang #ifndef _LINUX_TRACE_H 3478409ddSChunyan Zhang #define _LINUX_TRACE_H 4478409ddSChunyan Zhang 5478409ddSChunyan Zhang #ifdef CONFIG_TRACING 68438f521STingwei Zhang 78438f521STingwei Zhang #define TRACE_EXPORT_FUNCTION BIT(0) 88ab7a2b7STingwei Zhang #define TRACE_EXPORT_EVENT BIT(1) 9458999c6STingwei Zhang #define TRACE_EXPORT_MARKER BIT(2) 108438f521STingwei Zhang 11478409ddSChunyan Zhang /* 12478409ddSChunyan Zhang * The trace export - an export of Ftrace output. The trace_export 13478409ddSChunyan Zhang * can process traces and export them to a registered destination as 14478409ddSChunyan Zhang * an addition to the current only output of Ftrace - i.e. ring buffer. 15478409ddSChunyan Zhang * 16478409ddSChunyan Zhang * If you want traces to be sent to some other place rather than ring 17478409ddSChunyan Zhang * buffer only, just need to register a new trace_export and implement 18478409ddSChunyan Zhang * its own .write() function for writing traces to the storage. 19478409ddSChunyan Zhang * 20478409ddSChunyan Zhang * next - pointer to the next trace_export 21478409ddSChunyan Zhang * write - copy traces which have been delt with ->commit() to 22478409ddSChunyan Zhang * the destination 238438f521STingwei Zhang * flags - which ftrace to be exported 24478409ddSChunyan Zhang */ 25478409ddSChunyan Zhang struct trace_export { 26478409ddSChunyan Zhang struct trace_export __rcu *next; 27a773d419SFelipe Balbi void (*write)(struct trace_export *, const void *, unsigned int); 288438f521STingwei Zhang int flags; 29478409ddSChunyan Zhang }; 30478409ddSChunyan Zhang 31478409ddSChunyan Zhang int register_ftrace_export(struct trace_export *export); 32478409ddSChunyan Zhang int unregister_ftrace_export(struct trace_export *export); 33478409ddSChunyan Zhang 342d6425afSDivya Indi struct trace_array; 352d6425afSDivya Indi 362d6425afSDivya Indi void trace_printk_init_buffers(void); 37bd0c9706STom Rix __printf(3, 4) 382d6425afSDivya Indi int trace_array_printk(struct trace_array *tr, unsigned long ip, 392d6425afSDivya Indi const char *fmt, ...); 4038ce2a9eSSteven Rostedt (VMware) int trace_array_init_printk(struct trace_array *tr); 4128879787SDivya Indi void trace_array_put(struct trace_array *tr); 4228879787SDivya Indi struct trace_array *trace_array_get_by_name(const char *name); 432d6425afSDivya Indi int trace_array_destroy(struct trace_array *tr); 44bce29ac9SDaniel Bristot de Oliveira 45bce29ac9SDaniel Bristot de Oliveira /* For osnoise tracer */ 46bce29ac9SDaniel Bristot de Oliveira int osnoise_arch_register(void); 47bce29ac9SDaniel Bristot de Oliveira void osnoise_arch_unregister(void); 48*f7d9f637SDaniel Bristot de Oliveira void osnoise_trace_irq_entry(int id); 49*f7d9f637SDaniel Bristot de Oliveira void osnoise_trace_irq_exit(int id, const char *desc); 50bce29ac9SDaniel Bristot de Oliveira 51478409ddSChunyan Zhang #endif /* CONFIG_TRACING */ 52478409ddSChunyan Zhang 53478409ddSChunyan Zhang #endif /* _LINUX_TRACE_H */ 54