/* SPDX-License-Identifier: GPL-2.0 */ #ifndef __PERF_TSC_H #define __PERF_TSC_H #include <linux/types.h> struct perf_tsc_conversion { u16 time_shift; u32 time_mult; u64 time_zero; }; struct perf_event_mmap_page; int perf_read_tsc_conversion(const struct perf_event_mmap_page *pc, struct perf_tsc_conversion *tc); u64 perf_time_to_tsc(u64 ns, struct perf_tsc_conversion *tc); u64 tsc_to_perf_time(u64 cyc, struct perf_tsc_conversion *tc); u64 rdtsc(void); #endif // __PERF_TSC_H