1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */ 2*4882a593Smuzhiyun #ifndef __PERF_TSC_H 3*4882a593Smuzhiyun #define __PERF_TSC_H 4*4882a593Smuzhiyun 5*4882a593Smuzhiyun #include <linux/types.h> 6*4882a593Smuzhiyun 7*4882a593Smuzhiyun struct perf_tsc_conversion { 8*4882a593Smuzhiyun u16 time_shift; 9*4882a593Smuzhiyun u32 time_mult; 10*4882a593Smuzhiyun u64 time_zero; 11*4882a593Smuzhiyun u64 time_cycles; 12*4882a593Smuzhiyun u64 time_mask; 13*4882a593Smuzhiyun 14*4882a593Smuzhiyun bool cap_user_time_zero; 15*4882a593Smuzhiyun bool cap_user_time_short; 16*4882a593Smuzhiyun }; 17*4882a593Smuzhiyun 18*4882a593Smuzhiyun struct perf_event_mmap_page; 19*4882a593Smuzhiyun 20*4882a593Smuzhiyun int perf_read_tsc_conversion(const struct perf_event_mmap_page *pc, 21*4882a593Smuzhiyun struct perf_tsc_conversion *tc); 22*4882a593Smuzhiyun 23*4882a593Smuzhiyun u64 perf_time_to_tsc(u64 ns, struct perf_tsc_conversion *tc); 24*4882a593Smuzhiyun u64 tsc_to_perf_time(u64 cyc, struct perf_tsc_conversion *tc); 25*4882a593Smuzhiyun u64 rdtsc(void); 26*4882a593Smuzhiyun 27*4882a593Smuzhiyun #endif // __PERF_TSC_H 28