1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef __PERF_TSC_H 3 #define __PERF_TSC_H 4 5 #include <linux/types.h> 6 7 #include "event.h" 8 9 struct perf_tsc_conversion { 10 u16 time_shift; 11 u32 time_mult; 12 u64 time_zero; 13 u64 time_cycles; 14 u64 time_mask; 15 16 bool cap_user_time_zero; 17 bool cap_user_time_short; 18 }; 19 20 struct perf_event_mmap_page; 21 22 int perf_read_tsc_conversion(const struct perf_event_mmap_page *pc, 23 struct perf_tsc_conversion *tc); 24 25 u64 perf_time_to_tsc(u64 ns, struct perf_tsc_conversion *tc); 26 u64 tsc_to_perf_time(u64 cyc, struct perf_tsc_conversion *tc); 27 u64 rdtsc(void); 28 double arch_get_tsc_freq(void); 29 30 size_t perf_event__fprintf_time_conv(union perf_event *event, FILE *fp); 31 32 #endif // __PERF_TSC_H 33