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 }; 14 struct perf_event_mmap_page; 15 16 int perf_read_tsc_conversion(const struct perf_event_mmap_page *pc, 17 struct perf_tsc_conversion *tc); 18 19 u64 perf_time_to_tsc(u64 ns, struct perf_tsc_conversion *tc); 20 u64 tsc_to_perf_time(u64 cyc, struct perf_tsc_conversion *tc); 21 u64 rdtsc(void); 22 23 struct perf_event_mmap_page; 24 struct perf_tool; 25 struct machine; 26 27 int perf_event__synth_time_conv(const struct perf_event_mmap_page *pc, 28 struct perf_tool *tool, 29 perf_event__handler_t process, 30 struct machine *machine); 31 32 #endif 33