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
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