1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * X86 trace clocks
4  */
5 #include <asm/trace_clock.h>
6 #include <asm/barrier.h>
7 #include <asm/msr.h>
8 
9 /*
10  * trace_clock_x86_tsc(): A clock that is just the cycle counter.
11  *
12  * Unlike the other clocks, this is not in nanoseconds.
13  */
trace_clock_x86_tsc(void)14 u64 notrace trace_clock_x86_tsc(void)
15 {
16 	return rdtsc_ordered();
17 }
18