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 
29 size_t perf_event__fprintf_time_conv(union perf_event *event, FILE *fp);
30 
31 #endif // __PERF_TSC_H
32