| 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 | } |
| 18 |