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 INCLUDE__UTIL_PERF_CS_ETM_H__ 8 #define INCLUDE__UTIL_PERF_CS_ETM_H__ 9 10 #include "debug.h" 11 #include "util/event.h" 12 #include <linux/bits.h> 13 14 struct perf_session; 15 struct perf_pmu; 16 17 /* 18 * Versioning header in case things need to change in the future. That way 19 * decoding of old snapshot is still possible. 20 */ 21 enum { 22 /* Starting with 0x0 */ 23 CS_HEADER_VERSION, 24 /* PMU->type (32 bit), total # of CPUs (32 bit) */ 25 CS_PMU_TYPE_CPUS, 26 CS_ETM_SNAPSHOT, 27 CS_HEADER_VERSION_MAX, 28 }; 29 30 /* 31 * Update the version for new format. 32 * 33 * Version 1: format adds a param count to the per cpu metadata. 34 * This allows easy adding of new metadata parameters. 35 * Requires that new params always added after current ones. 36 * Also allows client reader to handle file versions that are different by 37 * checking the number of params in the file vs the number expected. 38 * 39 * Version 2: Drivers will use PERF_RECORD_AUX_OUTPUT_HW_ID to output 40 * CoreSight Trace ID. ...TRACEIDR metadata will be set to legacy values 41 * but with addition flags. 42 */ 43 #define CS_HEADER_CURRENT_VERSION 2 44 45 /* Beginning of header common to both ETMv3 and V4 */ 46 enum { 47 CS_ETM_MAGIC, 48 CS_ETM_CPU, 49 /* Number of trace config params in following ETM specific block */ 50 CS_ETM_NR_TRC_PARAMS, 51 CS_ETM_COMMON_BLK_MAX_V1, 52 }; 53 54 /* ETMv3/PTM metadata */ 55 enum { 56 /* Dynamic, configurable parameters */ 57 CS_ETM_ETMCR = CS_ETM_COMMON_BLK_MAX_V1, 58 CS_ETM_ETMTRACEIDR, 59 /* RO, taken from sysFS */ 60 CS_ETM_ETMCCER, 61 CS_ETM_ETMIDR, 62 CS_ETM_PRIV_MAX, 63 }; 64 65 /* define fixed version 0 length - allow new format reader to read old files. */ 66 #define CS_ETM_NR_TRC_PARAMS_V0 (CS_ETM_ETMIDR - CS_ETM_ETMCR + 1) 67 68 /* ETMv4 metadata */ 69 enum { 70 /* Dynamic, configurable parameters */ 71 CS_ETMV4_TRCCONFIGR = CS_ETM_COMMON_BLK_MAX_V1, 72 CS_ETMV4_TRCTRACEIDR, 73 /* RO, taken from sysFS */ 74 CS_ETMV4_TRCIDR0, 75 CS_ETMV4_TRCIDR1, 76 CS_ETMV4_TRCIDR2, 77 CS_ETMV4_TRCIDR8, 78 CS_ETMV4_TRCAUTHSTATUS, 79 CS_ETMV4_TS_SOURCE, 80 CS_ETMV4_PRIV_MAX, 81 }; 82 83 /* define fixed version 0 length - allow new format reader to read old files. */ 84 #define CS_ETMV4_NR_TRC_PARAMS_V0 (CS_ETMV4_TRCAUTHSTATUS - CS_ETMV4_TRCCONFIGR + 1) 85 86 /* 87 * ETE metadata is ETMv4 plus TRCDEVARCH register and doesn't support header V0 since it was 88 * added in header V1 89 */ 90 enum { 91 /* Dynamic, configurable parameters */ 92 CS_ETE_TRCCONFIGR = CS_ETM_COMMON_BLK_MAX_V1, 93 CS_ETE_TRCTRACEIDR, 94 /* RO, taken from sysFS */ 95 CS_ETE_TRCIDR0, 96 CS_ETE_TRCIDR1, 97 CS_ETE_TRCIDR2, 98 CS_ETE_TRCIDR8, 99 CS_ETE_TRCAUTHSTATUS, 100 CS_ETE_TRCDEVARCH, 101 CS_ETE_TS_SOURCE, 102 CS_ETE_PRIV_MAX 103 }; 104 105 /* 106 * Check for valid CoreSight trace ID. If an invalid value is present in the metadata, 107 * then IDs are present in the hardware ID packet in the data file. 108 */ 109 #define CS_IS_VALID_TRACE_ID(id) ((id > 0) && (id < 0x70)) 110 111 /* 112 * ETMv3 exception encoding number: 113 * See Embedded Trace Macrocell specification (ARM IHI 0014Q) 114 * table 7-12 Encoding of Exception[3:0] for non-ARMv7-M processors. 115 */ 116 enum { 117 CS_ETMV3_EXC_NONE = 0, 118 CS_ETMV3_EXC_DEBUG_HALT = 1, 119 CS_ETMV3_EXC_SMC = 2, 120 CS_ETMV3_EXC_HYP = 3, 121 CS_ETMV3_EXC_ASYNC_DATA_ABORT = 4, 122 CS_ETMV3_EXC_JAZELLE_THUMBEE = 5, 123 CS_ETMV3_EXC_PE_RESET = 8, 124 CS_ETMV3_EXC_UNDEFINED_INSTR = 9, 125 CS_ETMV3_EXC_SVC = 10, 126 CS_ETMV3_EXC_PREFETCH_ABORT = 11, 127 CS_ETMV3_EXC_DATA_FAULT = 12, 128 CS_ETMV3_EXC_GENERIC = 13, 129 CS_ETMV3_EXC_IRQ = 14, 130 CS_ETMV3_EXC_FIQ = 15, 131 }; 132 133 /* 134 * ETMv4 exception encoding number: 135 * See ARM Embedded Trace Macrocell Architecture Specification (ARM IHI 0064D) 136 * table 6-12 Possible values for the TYPE field in an Exception instruction 137 * trace packet, for ARMv7-A/R and ARMv8-A/R PEs. 138 */ 139 enum { 140 CS_ETMV4_EXC_RESET = 0, 141 CS_ETMV4_EXC_DEBUG_HALT = 1, 142 CS_ETMV4_EXC_CALL = 2, 143 CS_ETMV4_EXC_TRAP = 3, 144 CS_ETMV4_EXC_SYSTEM_ERROR = 4, 145 CS_ETMV4_EXC_INST_DEBUG = 6, 146 CS_ETMV4_EXC_DATA_DEBUG = 7, 147 CS_ETMV4_EXC_ALIGNMENT = 10, 148 CS_ETMV4_EXC_INST_FAULT = 11, 149 CS_ETMV4_EXC_DATA_FAULT = 12, 150 CS_ETMV4_EXC_IRQ = 14, 151 CS_ETMV4_EXC_FIQ = 15, 152 CS_ETMV4_EXC_END = 31, 153 }; 154 155 enum cs_etm_sample_type { 156 CS_ETM_EMPTY, 157 CS_ETM_RANGE, 158 CS_ETM_DISCONTINUITY, 159 CS_ETM_EXCEPTION, 160 CS_ETM_EXCEPTION_RET, 161 }; 162 163 enum cs_etm_isa { 164 CS_ETM_ISA_UNKNOWN, 165 CS_ETM_ISA_A64, 166 CS_ETM_ISA_A32, 167 CS_ETM_ISA_T32, 168 }; 169 170 struct cs_etm_queue; 171 172 struct cs_etm_packet { 173 enum cs_etm_sample_type sample_type; 174 enum cs_etm_isa isa; 175 u64 start_addr; 176 u64 end_addr; 177 u32 instr_count; 178 u32 last_instr_type; 179 u32 last_instr_subtype; 180 u32 flags; 181 u32 exception_number; 182 bool last_instr_cond; 183 bool last_instr_taken_branch; 184 u8 last_instr_size; 185 u8 trace_chan_id; 186 int cpu; 187 }; 188 189 #define CS_ETM_PACKET_MAX_BUFFER 1024 190 191 /* 192 * When working with per-thread scenarios the process under trace can 193 * be scheduled on any CPU and as such, more than one traceID may be 194 * associated with the same process. Since a traceID of '0' is illegal 195 * as per the CoreSight architecture, use that specific value to 196 * identify the queue where all packets (with any traceID) are 197 * aggregated. 198 */ 199 #define CS_ETM_PER_THREAD_TRACEID 0 200 201 struct cs_etm_packet_queue { 202 u32 packet_count; 203 u32 head; 204 u32 tail; 205 u32 instr_count; 206 u64 cs_timestamp; /* Timestamp from trace data, converted to ns if possible */ 207 u64 next_cs_timestamp; 208 struct cs_etm_packet packet_buffer[CS_ETM_PACKET_MAX_BUFFER]; 209 }; 210 211 #define KiB(x) ((x) * 1024) 212 #define MiB(x) ((x) * 1024 * 1024) 213 214 #define CS_ETM_INVAL_ADDR 0xdeadbeefdeadbeefUL 215 216 #define BMVAL(val, lsb, msb) ((val & GENMASK(msb, lsb)) >> lsb) 217 218 #define CS_ETM_HEADER_SIZE (CS_HEADER_VERSION_MAX * sizeof(u64)) 219 220 #define __perf_cs_etmv3_magic 0x3030303030303030ULL 221 #define __perf_cs_etmv4_magic 0x4040404040404040ULL 222 #define __perf_cs_ete_magic 0x5050505050505050ULL 223 #define CS_ETMV3_PRIV_SIZE (CS_ETM_PRIV_MAX * sizeof(u64)) 224 #define CS_ETMV4_PRIV_SIZE (CS_ETMV4_PRIV_MAX * sizeof(u64)) 225 #define CS_ETE_PRIV_SIZE (CS_ETE_PRIV_MAX * sizeof(u64)) 226 227 #define INFO_HEADER_SIZE (sizeof(((struct perf_record_auxtrace_info *)0)->type) + \ 228 sizeof(((struct perf_record_auxtrace_info *)0)->reserved__)) 229 230 /* CoreSight trace ID is currently the bottom 7 bits of the value */ 231 #define CORESIGHT_TRACE_ID_VAL_MASK GENMASK(6, 0) 232 233 /* 234 * perf record will set the legacy meta data values as unused initially. 235 * This allows perf report to manage the decoders created when dynamic 236 * allocation in operation. 237 */ 238 #define CORESIGHT_TRACE_ID_UNUSED_FLAG BIT(31) 239 240 /* Value to set for unused trace ID values */ 241 #define CORESIGHT_TRACE_ID_UNUSED_VAL 0x7F 242 243 int cs_etm__process_auxtrace_info(union perf_event *event, 244 struct perf_session *session); 245 void cs_etm_get_default_config(const struct perf_pmu *pmu, struct perf_event_attr *attr); 246 247 enum cs_etm_pid_fmt { 248 CS_ETM_PIDFMT_NONE, 249 CS_ETM_PIDFMT_CTXTID, 250 CS_ETM_PIDFMT_CTXTID2 251 }; 252 253 #ifdef HAVE_CSTRACE_SUPPORT 254 #include <opencsd/ocsd_if_types.h> 255 int cs_etm__get_cpu(u8 trace_chan_id, int *cpu); 256 enum cs_etm_pid_fmt cs_etm__get_pid_fmt(struct cs_etm_queue *etmq); 257 int cs_etm__etmq_set_tid_el(struct cs_etm_queue *etmq, pid_t tid, 258 u8 trace_chan_id, ocsd_ex_level el); 259 bool cs_etm__etmq_is_timeless(struct cs_etm_queue *etmq); 260 void cs_etm__etmq_set_traceid_queue_timestamp(struct cs_etm_queue *etmq, 261 u8 trace_chan_id); 262 struct cs_etm_packet_queue 263 *cs_etm__etmq_get_packet_queue(struct cs_etm_queue *etmq, u8 trace_chan_id); 264 int cs_etm__process_auxtrace_info_full(union perf_event *event __maybe_unused, 265 struct perf_session *session __maybe_unused); 266 u64 cs_etm__convert_sample_time(struct cs_etm_queue *etmq, u64 cs_timestamp); 267 #else 268 static inline int 269 cs_etm__process_auxtrace_info_full(union perf_event *event __maybe_unused, 270 struct perf_session *session __maybe_unused) 271 { 272 pr_err("\nCS ETM Trace: OpenCSD is not linked in, please recompile with CORESIGHT=1\n"); 273 return -1; 274 } 275 #endif 276 277 #endif 278