coresight-pmu.h

 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 This has been replaced by drivers using a dynamic allocation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 * [39:08] - Sink ID - as reported in /sys/bus/event_source/devices/cs_etm/sinks/
53 *	      Added in minor version 1.
54 * [55:40] - Unused (SBZ)
55 * [59:56] - Minor Version - previously existing fields are compatible with
56 *	      all minor versions.
57 * [63:60] - Major Version - previously existing fields mean different things
58 *	      in new major versions.
59 */
60#define CS_AUX_HW_ID_TRACE_ID_MASK	GENMASK_ULL(7, 0)
61#define CS_AUX_HW_ID_SINK_ID_MASK	GENMASK_ULL(39, 8)
62
63#define CS_AUX_HW_ID_MINOR_VERSION_MASK	GENMASK_ULL(59, 56)
64#define CS_AUX_HW_ID_MAJOR_VERSION_MASK	GENMASK_ULL(63, 60)
65
66#define CS_AUX_HW_ID_MAJOR_VERSION 0
67#define CS_AUX_HW_ID_MINOR_VERSION 1
68
69#endif