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1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* | |
3 | * Arm Statistical Profiling Extensions (SPE) support | |
4 | * Copyright (c) 2017-2018, Arm Ltd. | |
5 | */ | |
6 | ||
7 | #include <endian.h> | |
8 | #include <errno.h> | |
9 | #include <byteswap.h> | |
10 | #include <inttypes.h> | |
7ae811b1 ACM |
11 | #include <unistd.h> |
12 | #include <stdlib.h> | |
ffd3d18c KP |
13 | #include <linux/kernel.h> |
14 | #include <linux/types.h> | |
15 | #include <linux/bitops.h> | |
16 | #include <linux/log2.h> | |
7f7c536f | 17 | #include <linux/zalloc.h> |
ffd3d18c | 18 | |
ffd3d18c KP |
19 | #include "color.h" |
20 | #include "evsel.h" | |
ffd3d18c KP |
21 | #include "machine.h" |
22 | #include "session.h" | |
ffd3d18c KP |
23 | #include "debug.h" |
24 | #include "auxtrace.h" | |
25 | #include "arm-spe.h" | |
26 | #include "arm-spe-pkt-decoder.h" | |
27 | ||
28 | struct arm_spe { | |
29 | struct auxtrace auxtrace; | |
30 | struct auxtrace_queues queues; | |
31 | struct auxtrace_heap heap; | |
32 | u32 auxtrace_type; | |
33 | struct perf_session *session; | |
34 | struct machine *machine; | |
35 | u32 pmu_type; | |
36 | }; | |
37 | ||
38 | struct arm_spe_queue { | |
39 | struct arm_spe *spe; | |
40 | unsigned int queue_nr; | |
41 | struct auxtrace_buffer *buffer; | |
42 | bool on_heap; | |
43 | bool done; | |
44 | pid_t pid; | |
45 | pid_t tid; | |
46 | int cpu; | |
47 | }; | |
48 | ||
49 | static void arm_spe_dump(struct arm_spe *spe __maybe_unused, | |
50 | unsigned char *buf, size_t len) | |
51 | { | |
52 | struct arm_spe_pkt packet; | |
53 | size_t pos = 0; | |
54 | int ret, pkt_len, i; | |
55 | char desc[ARM_SPE_PKT_DESC_MAX]; | |
56 | const char *color = PERF_COLOR_BLUE; | |
57 | ||
58 | color_fprintf(stdout, color, | |
59 | ". ... ARM SPE data: size %zu bytes\n", | |
60 | len); | |
61 | ||
62 | while (len) { | |
63 | ret = arm_spe_get_packet(buf, len, &packet); | |
64 | if (ret > 0) | |
65 | pkt_len = ret; | |
66 | else | |
67 | pkt_len = 1; | |
68 | printf("."); | |
69 | color_fprintf(stdout, color, " %08x: ", pos); | |
70 | for (i = 0; i < pkt_len; i++) | |
71 | color_fprintf(stdout, color, " %02x", buf[i]); | |
72 | for (; i < 16; i++) | |
73 | color_fprintf(stdout, color, " "); | |
74 | if (ret > 0) { | |
75 | ret = arm_spe_pkt_desc(&packet, desc, | |
76 | ARM_SPE_PKT_DESC_MAX); | |
77 | if (ret > 0) | |
78 | color_fprintf(stdout, color, " %s\n", desc); | |
79 | } else { | |
80 | color_fprintf(stdout, color, " Bad packet!\n"); | |
81 | } | |
82 | pos += pkt_len; | |
83 | buf += pkt_len; | |
84 | len -= pkt_len; | |
85 | } | |
86 | } | |
87 | ||
88 | static void arm_spe_dump_event(struct arm_spe *spe, unsigned char *buf, | |
89 | size_t len) | |
90 | { | |
91 | printf(".\n"); | |
92 | arm_spe_dump(spe, buf, len); | |
93 | } | |
94 | ||
95 | static int arm_spe_process_event(struct perf_session *session __maybe_unused, | |
96 | union perf_event *event __maybe_unused, | |
97 | struct perf_sample *sample __maybe_unused, | |
98 | struct perf_tool *tool __maybe_unused) | |
99 | { | |
100 | return 0; | |
101 | } | |
102 | ||
103 | static int arm_spe_process_auxtrace_event(struct perf_session *session, | |
104 | union perf_event *event, | |
105 | struct perf_tool *tool __maybe_unused) | |
106 | { | |
107 | struct arm_spe *spe = container_of(session->auxtrace, struct arm_spe, | |
108 | auxtrace); | |
109 | struct auxtrace_buffer *buffer; | |
110 | off_t data_offset; | |
111 | int fd = perf_data__fd(session->data); | |
112 | int err; | |
113 | ||
114 | if (perf_data__is_pipe(session->data)) { | |
115 | data_offset = 0; | |
116 | } else { | |
117 | data_offset = lseek(fd, 0, SEEK_CUR); | |
118 | if (data_offset == -1) | |
119 | return -errno; | |
120 | } | |
121 | ||
122 | err = auxtrace_queues__add_event(&spe->queues, session, event, | |
123 | data_offset, &buffer); | |
124 | if (err) | |
125 | return err; | |
126 | ||
127 | /* Dump here now we have copied a piped trace out of the pipe */ | |
128 | if (dump_trace) { | |
129 | if (auxtrace_buffer__get_data(buffer, fd)) { | |
130 | arm_spe_dump_event(spe, buffer->data, | |
131 | buffer->size); | |
132 | auxtrace_buffer__put_data(buffer); | |
133 | } | |
134 | } | |
135 | ||
136 | return 0; | |
137 | } | |
138 | ||
139 | static int arm_spe_flush(struct perf_session *session __maybe_unused, | |
140 | struct perf_tool *tool __maybe_unused) | |
141 | { | |
142 | return 0; | |
143 | } | |
144 | ||
145 | static void arm_spe_free_queue(void *priv) | |
146 | { | |
147 | struct arm_spe_queue *speq = priv; | |
148 | ||
149 | if (!speq) | |
150 | return; | |
151 | free(speq); | |
152 | } | |
153 | ||
154 | static void arm_spe_free_events(struct perf_session *session) | |
155 | { | |
156 | struct arm_spe *spe = container_of(session->auxtrace, struct arm_spe, | |
157 | auxtrace); | |
158 | struct auxtrace_queues *queues = &spe->queues; | |
159 | unsigned int i; | |
160 | ||
161 | for (i = 0; i < queues->nr_queues; i++) { | |
162 | arm_spe_free_queue(queues->queue_array[i].priv); | |
163 | queues->queue_array[i].priv = NULL; | |
164 | } | |
165 | auxtrace_queues__free(queues); | |
166 | } | |
167 | ||
168 | static void arm_spe_free(struct perf_session *session) | |
169 | { | |
170 | struct arm_spe *spe = container_of(session->auxtrace, struct arm_spe, | |
171 | auxtrace); | |
172 | ||
173 | auxtrace_heap__free(&spe->heap); | |
174 | arm_spe_free_events(session); | |
175 | session->auxtrace = NULL; | |
176 | free(spe); | |
177 | } | |
178 | ||
179 | static const char * const arm_spe_info_fmts[] = { | |
180 | [ARM_SPE_PMU_TYPE] = " PMU Type %"PRId64"\n", | |
181 | }; | |
182 | ||
9a8dad04 | 183 | static void arm_spe_print_info(__u64 *arr) |
ffd3d18c KP |
184 | { |
185 | if (!dump_trace) | |
186 | return; | |
187 | ||
188 | fprintf(stdout, arm_spe_info_fmts[ARM_SPE_PMU_TYPE], arr[ARM_SPE_PMU_TYPE]); | |
189 | } | |
190 | ||
191 | int arm_spe_process_auxtrace_info(union perf_event *event, | |
192 | struct perf_session *session) | |
193 | { | |
72932371 | 194 | struct perf_record_auxtrace_info *auxtrace_info = &event->auxtrace_info; |
ffd3d18c KP |
195 | size_t min_sz = sizeof(u64) * ARM_SPE_PMU_TYPE; |
196 | struct arm_spe *spe; | |
197 | int err; | |
198 | ||
72932371 | 199 | if (auxtrace_info->header.size < sizeof(struct perf_record_auxtrace_info) + |
ffd3d18c KP |
200 | min_sz) |
201 | return -EINVAL; | |
202 | ||
203 | spe = zalloc(sizeof(struct arm_spe)); | |
204 | if (!spe) | |
205 | return -ENOMEM; | |
206 | ||
207 | err = auxtrace_queues__init(&spe->queues); | |
208 | if (err) | |
209 | goto err_free; | |
210 | ||
211 | spe->session = session; | |
212 | spe->machine = &session->machines.host; /* No kvm support */ | |
213 | spe->auxtrace_type = auxtrace_info->type; | |
214 | spe->pmu_type = auxtrace_info->priv[ARM_SPE_PMU_TYPE]; | |
215 | ||
216 | spe->auxtrace.process_event = arm_spe_process_event; | |
217 | spe->auxtrace.process_auxtrace_event = arm_spe_process_auxtrace_event; | |
218 | spe->auxtrace.flush_events = arm_spe_flush; | |
219 | spe->auxtrace.free_events = arm_spe_free_events; | |
220 | spe->auxtrace.free = arm_spe_free; | |
221 | session->auxtrace = &spe->auxtrace; | |
222 | ||
223 | arm_spe_print_info(&auxtrace_info->priv[0]); | |
224 | ||
225 | return 0; | |
226 | ||
227 | err_free: | |
228 | free(spe); | |
229 | return err; | |
230 | } |