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 "util/session.h"
12 #include <linux/bits.h>
14 /* Versionning header in case things need tro change in the future. That way
15 * decoding of old snapshot is still possible.
18 /* Starting with 0x0 */
20 /* PMU->type (32 bit), total # of CPUs (32 bit) */
23 CS_HEADER_VERSION_0_MAX,
26 /* Beginning of header common to both ETMv3 and V4 */
32 /* ETMv3/PTM metadata */
34 /* Dynamic, configurable parameters */
35 CS_ETM_ETMCR = CS_ETM_CPU + 1,
37 /* RO, taken from sysFS */
45 /* Dynamic, configurable parameters */
46 CS_ETMV4_TRCCONFIGR = CS_ETM_CPU + 1,
48 /* RO, taken from sysFS */
53 CS_ETMV4_TRCAUTHSTATUS,
58 * ETMv3 exception encoding number:
59 * See Embedded Trace Macrocell spcification (ARM IHI 0014Q)
60 * table 7-12 Encoding of Exception[3:0] for non-ARMv7-M processors.
63 CS_ETMV3_EXC_NONE = 0,
64 CS_ETMV3_EXC_DEBUG_HALT = 1,
67 CS_ETMV3_EXC_ASYNC_DATA_ABORT = 4,
68 CS_ETMV3_EXC_JAZELLE_THUMBEE = 5,
69 CS_ETMV3_EXC_PE_RESET = 8,
70 CS_ETMV3_EXC_UNDEFINED_INSTR = 9,
71 CS_ETMV3_EXC_SVC = 10,
72 CS_ETMV3_EXC_PREFETCH_ABORT = 11,
73 CS_ETMV3_EXC_DATA_FAULT = 12,
74 CS_ETMV3_EXC_GENERIC = 13,
75 CS_ETMV3_EXC_IRQ = 14,
76 CS_ETMV3_EXC_FIQ = 15,
80 * ETMv4 exception encoding number:
81 * See ARM Embedded Trace Macrocell Architecture Specification (ARM IHI 0064D)
82 * table 6-12 Possible values for the TYPE field in an Exception instruction
83 * trace packet, for ARMv7-A/R and ARMv8-A/R PEs.
86 CS_ETMV4_EXC_RESET = 0,
87 CS_ETMV4_EXC_DEBUG_HALT = 1,
88 CS_ETMV4_EXC_CALL = 2,
89 CS_ETMV4_EXC_TRAP = 3,
90 CS_ETMV4_EXC_SYSTEM_ERROR = 4,
91 CS_ETMV4_EXC_INST_DEBUG = 6,
92 CS_ETMV4_EXC_DATA_DEBUG = 7,
93 CS_ETMV4_EXC_ALIGNMENT = 10,
94 CS_ETMV4_EXC_INST_FAULT = 11,
95 CS_ETMV4_EXC_DATA_FAULT = 12,
96 CS_ETMV4_EXC_IRQ = 14,
97 CS_ETMV4_EXC_FIQ = 15,
98 CS_ETMV4_EXC_END = 31,
101 enum cs_etm_sample_type {
104 CS_ETM_DISCONTINUITY,
106 CS_ETM_EXCEPTION_RET,
116 /* RB tree for quick conversion between traceID and metadata pointers */
117 struct intlist *traceid_list;
121 struct cs_etm_packet {
122 enum cs_etm_sample_type sample_type;
128 u32 last_instr_subtype;
130 u32 exception_number;
132 u8 last_instr_taken_branch;
138 #define CS_ETM_PACKET_MAX_BUFFER 1024
141 * When working with per-thread scenarios the process under trace can
142 * be scheduled on any CPU and as such, more than one traceID may be
143 * associated with the same process. Since a traceID of '0' is illegal
144 * as per the CoreSight architecture, use that specific value to
145 * identify the queue where all packets (with any traceID) are
148 #define CS_ETM_PER_THREAD_TRACEID 0
150 struct cs_etm_packet_queue {
157 struct cs_etm_packet packet_buffer[CS_ETM_PACKET_MAX_BUFFER];
160 #define KiB(x) ((x) * 1024)
161 #define MiB(x) ((x) * 1024 * 1024)
163 #define CS_ETM_INVAL_ADDR 0xdeadbeefdeadbeefUL
165 #define BMVAL(val, lsb, msb) ((val & GENMASK(msb, lsb)) >> lsb)
167 #define CS_ETM_HEADER_SIZE (CS_HEADER_VERSION_0_MAX * sizeof(u64))
169 #define __perf_cs_etmv3_magic 0x3030303030303030ULL
170 #define __perf_cs_etmv4_magic 0x4040404040404040ULL
171 #define CS_ETMV3_PRIV_SIZE (CS_ETM_PRIV_MAX * sizeof(u64))
172 #define CS_ETMV4_PRIV_SIZE (CS_ETMV4_PRIV_MAX * sizeof(u64))
174 #ifdef HAVE_CSTRACE_SUPPORT
175 int cs_etm__process_auxtrace_info(union perf_event *event,
176 struct perf_session *session);
177 int cs_etm__get_cpu(u8 trace_chan_id, int *cpu);
178 int cs_etm__etmq_set_tid(struct cs_etm_queue *etmq,
179 pid_t tid, u8 trace_chan_id);
180 bool cs_etm__etmq_is_timeless(struct cs_etm_queue *etmq);
181 void cs_etm__etmq_set_traceid_queue_timestamp(struct cs_etm_queue *etmq,
183 struct cs_etm_packet_queue
184 *cs_etm__etmq_get_packet_queue(struct cs_etm_queue *etmq, u8 trace_chan_id);
187 cs_etm__process_auxtrace_info(union perf_event *event __maybe_unused,
188 struct perf_session *session __maybe_unused)
193 static inline int cs_etm__get_cpu(u8 trace_chan_id __maybe_unused,
194 int *cpu __maybe_unused)
199 static inline int cs_etm__etmq_set_tid(
200 struct cs_etm_queue *etmq __maybe_unused,
201 pid_t tid __maybe_unused,
202 u8 trace_chan_id __maybe_unused)
207 static inline bool cs_etm__etmq_is_timeless(
208 struct cs_etm_queue *etmq __maybe_unused)
210 /* What else to return? */
214 static inline void cs_etm__etmq_set_traceid_queue_timestamp(
215 struct cs_etm_queue *etmq __maybe_unused,
216 u8 trace_chan_id __maybe_unused) {}
218 static inline struct cs_etm_packet_queue *cs_etm__etmq_get_packet_queue(
219 struct cs_etm_queue *etmq __maybe_unused,
220 u8 trace_chan_id __maybe_unused)