Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * Copyright(C) 2015 Linaro Limited. All rights reserved.
4 * Author: Mathieu Poirier <mathieu.poirier@linaro.org>
5 */
6
7#ifndef _LINUX_CORESIGHT_PMU_H
8#define _LINUX_CORESIGHT_PMU_H
9
10#include <linux/bits.h>
11
12#define CORESIGHT_ETM_PMU_NAME "cs_etm"
13
14/*
15 * The legacy Trace ID system based on fixed calculation from the cpu
16 * number. This has been replaced by drivers using a dynamic allocation
17 * system - but need to retain the legacy algorithm for backward comparibility
18 * in certain situations:-
19 * a) new perf running on older systems that generate the legacy mapping
20 * b) older tools that may not update at the same time as the kernel.
21 */
22#define CORESIGHT_LEGACY_CPU_TRACE_ID(cpu) (0x10 + (cpu * 2))
23
24/*
25 * Interpretation of the PERF_RECORD_AUX_OUTPUT_HW_ID payload.
26 * Used to associate a CPU with the CoreSight Trace ID.
27 * [07:00] - Trace ID - uses 8 bits to make value easy to read in file.
28 * [39:08] - Sink ID - as reported in /sys/bus/event_source/devices/cs_etm/sinks/
29 * Added in minor version 1.
30 * [55:40] - Unused (SBZ)
31 * [59:56] - Minor Version - previously existing fields are compatible with
32 * all minor versions.
33 * [63:60] - Major Version - previously existing fields mean different things
34 * in new major versions.
35 */
36#define CS_AUX_HW_ID_TRACE_ID_MASK GENMASK_ULL(7, 0)
37#define CS_AUX_HW_ID_SINK_ID_MASK GENMASK_ULL(39, 8)
38
39#define CS_AUX_HW_ID_MINOR_VERSION_MASK GENMASK_ULL(59, 56)
40#define CS_AUX_HW_ID_MAJOR_VERSION_MASK GENMASK_ULL(63, 60)
41
42#define CS_AUX_HW_ID_MAJOR_VERSION 0
43#define CS_AUX_HW_ID_MINOR_VERSION 1
44
45#endif