LXR linux/arch/x86/kernel/trace

   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 */
  14u64 notrace trace_clock_x86_tsc(void)
  15{
  16        return rdtsc_ordered();
  17}
  18