arch/x86/kernel/trace_clock.c

   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  */
  14 u64 notrace trace_clock_x86_tsc(void)
  15 {
  16         return rdtsc_ordered();
  17 }