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 This has been replaced by drivers using a dynamic allocation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 * Below are the definition of bit offsets for perf option, and works as
26 * arbitrary values for all ETM versions.
27 *
28 * Most of them are orignally from ETMv3.5/PTM's ETMCR config, therefore,
29 * ETMv3.5/PTM doesn't define ETMCR config bits with prefix "ETM3_" and
30 * directly use below macros as config bits.
31 */
32#define ETM_OPT_BRANCH_BROADCAST 8
33#define ETM_OPT_CYCACC 12
34#define ETM_OPT_CTXTID 14
35#define ETM_OPT_CTXTID2 15
36#define ETM_OPT_TS 28
37#define ETM_OPT_RETSTK 29
38
39/* ETMv4 CONFIGR programming bits for the ETM OPTs */
40#define ETM4_CFG_BIT_BB 3
41#define ETM4_CFG_BIT_CYCACC 4
42#define ETM4_CFG_BIT_CTXTID 6
43#define ETM4_CFG_BIT_VMID 7
44#define ETM4_CFG_BIT_TS 11
45#define ETM4_CFG_BIT_RETSTK 12
46#define ETM4_CFG_BIT_VMID_OPT 15
47
48/*
49 * Interpretation of the PERF_RECORD_AUX_OUTPUT_HW_ID payload.
50 * Used to associate a CPU with the CoreSight Trace ID.
51 * [07:00] - Trace ID - uses 8 bits to make value easy to read in file.
52 * [59:08] - Unused (SBZ)
53 * [63:60] - Version
54 */
55#define CS_AUX_HW_ID_TRACE_ID_MASK GENMASK_ULL(7, 0)
56#define CS_AUX_HW_ID_VERSION_MASK GENMASK_ULL(63, 60)
57
58#define CS_AUX_HW_ID_CURR_VERSION 0
59
60#endif
61

source code of linux/include/linux/coresight-pmu.h