1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Copyright(C) 2015 Linaro Limited. All rights reserved.
4 * Author: Mathieu Poirier <mathieu.poirier@linaro.org>
7 #ifndef INCLUDE__UTIL_PERF_CS_ETM_H__
8 #define INCLUDE__UTIL_PERF_CS_ETM_H__
10 #include "util/event.h"
11 #include <linux/bits.h>
16 * Versioning header in case things need to change in the future. That way
17 * decoding of old snapshot is still possible.
20 /* Starting with 0x0 */
22 /* PMU->type (32 bit), total # of CPUs (32 bit) */
25 CS_HEADER_VERSION_MAX,
29 * Update the version for new format.
31 * New version 1 format adds a param count to the per cpu metadata.
32 * This allows easy adding of new metadata parameters.
33 * Requires that new params always added after current ones.
34 * Also allows client reader to handle file versions that are different by
35 * checking the number of params in the file vs the number expected.
37 #define CS_HEADER_CURRENT_VERSION 1
39 /* Beginning of header common to both ETMv3 and V4 */
43 /* Number of trace config params in following ETM specific block */
45 CS_ETM_COMMON_BLK_MAX_V1,
48 /* ETMv3/PTM metadata */
50 /* Dynamic, configurable parameters */
51 CS_ETM_ETMCR = CS_ETM_COMMON_BLK_MAX_V1,
53 /* RO, taken from sysFS */
59 /* define fixed version 0 length - allow new format reader to read old files. */
60 #define CS_ETM_NR_TRC_PARAMS_V0 (CS_ETM_ETMIDR - CS_ETM_ETMCR + 1)
64 /* Dynamic, configurable parameters */
65 CS_ETMV4_TRCCONFIGR = CS_ETM_COMMON_BLK_MAX_V1,
67 /* RO, taken from sysFS */
72 CS_ETMV4_TRCAUTHSTATUS,
76 /* define fixed version 0 length - allow new format reader to read old files. */
77 #define CS_ETMV4_NR_TRC_PARAMS_V0 (CS_ETMV4_TRCAUTHSTATUS - CS_ETMV4_TRCCONFIGR + 1)
80 * ETMv3 exception encoding number:
81 * See Embedded Trace Macrocell specification (ARM IHI 0014Q)
82 * table 7-12 Encoding of Exception[3:0] for non-ARMv7-M processors.
85 CS_ETMV3_EXC_NONE = 0,
86 CS_ETMV3_EXC_DEBUG_HALT = 1,
89 CS_ETMV3_EXC_ASYNC_DATA_ABORT = 4,
90 CS_ETMV3_EXC_JAZELLE_THUMBEE = 5,
91 CS_ETMV3_EXC_PE_RESET = 8,
92 CS_ETMV3_EXC_UNDEFINED_INSTR = 9,
93 CS_ETMV3_EXC_SVC = 10,
94 CS_ETMV3_EXC_PREFETCH_ABORT = 11,
95 CS_ETMV3_EXC_DATA_FAULT = 12,
96 CS_ETMV3_EXC_GENERIC = 13,
97 CS_ETMV3_EXC_IRQ = 14,
98 CS_ETMV3_EXC_FIQ = 15,
102 * ETMv4 exception encoding number:
103 * See ARM Embedded Trace Macrocell Architecture Specification (ARM IHI 0064D)
104 * table 6-12 Possible values for the TYPE field in an Exception instruction
105 * trace packet, for ARMv7-A/R and ARMv8-A/R PEs.
108 CS_ETMV4_EXC_RESET = 0,
109 CS_ETMV4_EXC_DEBUG_HALT = 1,
110 CS_ETMV4_EXC_CALL = 2,
111 CS_ETMV4_EXC_TRAP = 3,
112 CS_ETMV4_EXC_SYSTEM_ERROR = 4,
113 CS_ETMV4_EXC_INST_DEBUG = 6,
114 CS_ETMV4_EXC_DATA_DEBUG = 7,
115 CS_ETMV4_EXC_ALIGNMENT = 10,
116 CS_ETMV4_EXC_INST_FAULT = 11,
117 CS_ETMV4_EXC_DATA_FAULT = 12,
118 CS_ETMV4_EXC_IRQ = 14,
119 CS_ETMV4_EXC_FIQ = 15,
120 CS_ETMV4_EXC_END = 31,
123 enum cs_etm_sample_type {
126 CS_ETM_DISCONTINUITY,
128 CS_ETM_EXCEPTION_RET,
140 struct cs_etm_packet {
141 enum cs_etm_sample_type sample_type;
147 u32 last_instr_subtype;
149 u32 exception_number;
151 u8 last_instr_taken_branch;
157 #define CS_ETM_PACKET_MAX_BUFFER 1024
160 * When working with per-thread scenarios the process under trace can
161 * be scheduled on any CPU and as such, more than one traceID may be
162 * associated with the same process. Since a traceID of '0' is illegal
163 * as per the CoreSight architecture, use that specific value to
164 * identify the queue where all packets (with any traceID) are
167 #define CS_ETM_PER_THREAD_TRACEID 0
169 struct cs_etm_packet_queue {
175 u64 next_cs_timestamp;
176 struct cs_etm_packet packet_buffer[CS_ETM_PACKET_MAX_BUFFER];
179 #define KiB(x) ((x) * 1024)
180 #define MiB(x) ((x) * 1024 * 1024)
182 #define CS_ETM_INVAL_ADDR 0xdeadbeefdeadbeefUL
184 #define BMVAL(val, lsb, msb) ((val & GENMASK(msb, lsb)) >> lsb)
186 #define CS_ETM_HEADER_SIZE (CS_HEADER_VERSION_MAX * sizeof(u64))
188 #define __perf_cs_etmv3_magic 0x3030303030303030ULL
189 #define __perf_cs_etmv4_magic 0x4040404040404040ULL
190 #define CS_ETMV3_PRIV_SIZE (CS_ETM_PRIV_MAX * sizeof(u64))
191 #define CS_ETMV4_PRIV_SIZE (CS_ETMV4_PRIV_MAX * sizeof(u64))
193 #ifdef HAVE_CSTRACE_SUPPORT
194 int cs_etm__process_auxtrace_info(union perf_event *event,
195 struct perf_session *session);
196 int cs_etm__get_cpu(u8 trace_chan_id, int *cpu);
197 int cs_etm__get_pid_fmt(u8 trace_chan_id, u64 *pid_fmt);
198 int cs_etm__etmq_set_tid(struct cs_etm_queue *etmq,
199 pid_t tid, u8 trace_chan_id);
200 bool cs_etm__etmq_is_timeless(struct cs_etm_queue *etmq);
201 void cs_etm__etmq_set_traceid_queue_timestamp(struct cs_etm_queue *etmq,
203 struct cs_etm_packet_queue
204 *cs_etm__etmq_get_packet_queue(struct cs_etm_queue *etmq, u8 trace_chan_id);
207 cs_etm__process_auxtrace_info(union perf_event *event __maybe_unused,
208 struct perf_session *session __maybe_unused)
213 static inline int cs_etm__get_cpu(u8 trace_chan_id __maybe_unused,
214 int *cpu __maybe_unused)
219 static inline int cs_etm__etmq_set_tid(
220 struct cs_etm_queue *etmq __maybe_unused,
221 pid_t tid __maybe_unused,
222 u8 trace_chan_id __maybe_unused)
227 static inline bool cs_etm__etmq_is_timeless(
228 struct cs_etm_queue *etmq __maybe_unused)
230 /* What else to return? */
234 static inline void cs_etm__etmq_set_traceid_queue_timestamp(
235 struct cs_etm_queue *etmq __maybe_unused,
236 u8 trace_chan_id __maybe_unused) {}
238 static inline struct cs_etm_packet_queue *cs_etm__etmq_get_packet_queue(
239 struct cs_etm_queue *etmq __maybe_unused,
240 u8 trace_chan_id __maybe_unused)