1 | // SPDX-License-Identifier: GPL-2.0 |
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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 |