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 struct perf_tsc_conversion { 8 u16 time_shift; 9 u32 time_mult; 10 u64 time_zero; 11 }; 12 13 struct perf_event_mmap_page; 14 15 int perf_read_tsc_conversion(const struct perf_event_mmap_page *pc, 16 struct perf_tsc_conversion *tc); 17 18 u64 perf_time_to_tsc(u64 ns, struct perf_tsc_conversion *tc); 19 u64 tsc_to_perf_time(u64 cyc, struct perf_tsc_conversion *tc); 20 u64 rdtsc(void); 21 22 #endif // __PERF_TSC_H 23