1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
|
// SPDX-License-Identifier: GPL-2.0
/*
* Arm Statistical Profiling Extensions (SPE) support
* Copyright (c) 2017-2018, Arm Ltd.
*/
#include <endian.h>
#include <errno.h>
#include <byteswap.h>
#include <inttypes.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/bitops.h>
#include <linux/log2.h>
#include "cpumap.h"
#include "color.h"
#include "evsel.h"
#include "evlist.h"
#include "machine.h"
#include "session.h"
#include "util.h"
#include "thread.h"
#include "debug.h"
#include "auxtrace.h"
#include "arm-spe.h"
#include "arm-spe-pkt-decoder.h"
struct arm_spe {
struct auxtrace auxtrace;
struct auxtrace_queues queues;
struct auxtrace_heap heap;
u32 auxtrace_type;
struct perf_session *session;
struct machine *machine;
u32 pmu_type;
};
struct arm_spe_queue {
struct arm_spe *spe;
unsigned int queue_nr;
struct auxtrace_buffer *buffer;
bool on_heap;
bool done;
pid_t pid;
pid_t tid;
int cpu;
};
static void arm_spe_dump(struct arm_spe *spe __maybe_unused,
unsigned char *buf, size_t len)
{
struct arm_spe_pkt packet;
size_t pos = 0;
int ret, pkt_len, i;
char desc[ARM_SPE_PKT_DESC_MAX];
const char *color = PERF_COLOR_BLUE;
color_fprintf(stdout, color,
". ... ARM SPE data: size %zu bytes\n",
len);
while (len) {
ret = arm_spe_get_packet(buf, len, &packet);
if (ret > 0)
pkt_len = ret;
else
pkt_len = 1;
printf(".");
color_fprintf(stdout, color, " %08x: ", pos);
for (i = 0; i < pkt_len; i++)
color_fprintf(stdout, color, " %02x", buf[i]);
for (; i < 16; i++)
color_fprintf(stdout, color, " ");
if (ret > 0) {
ret = arm_spe_pkt_desc(&packet, desc,
ARM_SPE_PKT_DESC_MAX);
if (ret > 0)
color_fprintf(stdout, color, " %s\n", desc);
} else {
color_fprintf(stdout, color, " Bad packet!\n");
}
pos += pkt_len;
buf += pkt_len;
len -= pkt_len;
}
}
static void arm_spe_dump_event(struct arm_spe *spe, unsigned char *buf,
size_t len)
{
printf(".\n");
arm_spe_dump(spe, buf, len);
}
static int arm_spe_process_event(struct perf_session *session __maybe_unused,
union perf_event *event __maybe_unused,
struct perf_sample *sample __maybe_unused,
struct perf_tool *tool __maybe_unused)
{
return 0;
}
static int arm_spe_process_auxtrace_event(struct perf_session *session,
union perf_event *event,
struct perf_tool *tool __maybe_unused)
{
struct arm_spe *spe = container_of(session->auxtrace, struct arm_spe,
auxtrace);
struct auxtrace_buffer *buffer;
off_t data_offset;
int fd = perf_data__fd(session->data);
int err;
if (perf_data__is_pipe(session->data)) {
data_offset = 0;
} else {
data_offset = lseek(fd, 0, SEEK_CUR);
if (data_offset == -1)
return -errno;
}
err = auxtrace_queues__add_event(&spe->queues, session, event,
data_offset, &buffer);
if (err)
return err;
/* Dump here now we have copied a piped trace out of the pipe */
if (dump_trace) {
if (auxtrace_buffer__get_data(buffer, fd)) {
arm_spe_dump_event(spe, buffer->data,
buffer->size);
auxtrace_buffer__put_data(buffer);
}
}
return 0;
}
static int arm_spe_flush(struct perf_session *session __maybe_unused,
struct perf_tool *tool __maybe_unused)
{
return 0;
}
static void arm_spe_free_queue(void *priv)
{
struct arm_spe_queue *speq = priv;
if (!speq)
return;
free(speq);
}
static void arm_spe_free_events(struct perf_session *session)
{
struct arm_spe *spe = container_of(session->auxtrace, struct arm_spe,
auxtrace);
struct auxtrace_queues *queues = &spe->queues;
unsigned int i;
for (i = 0; i < queues->nr_queues; i++) {
arm_spe_free_queue(queues->queue_array[i].priv);
queues->queue_array[i].priv = NULL;
}
auxtrace_queues__free(queues);
}
static void arm_spe_free(struct perf_session *session)
{
struct arm_spe *spe = container_of(session->auxtrace, struct arm_spe,
auxtrace);
auxtrace_heap__free(&spe->heap);
arm_spe_free_events(session);
session->auxtrace = NULL;
free(spe);
}
static const char * const arm_spe_info_fmts[] = {
[ARM_SPE_PMU_TYPE] = " PMU Type %"PRId64"\n",
};
static void arm_spe_print_info(u64 *arr)
{
if (!dump_trace)
return;
fprintf(stdout, arm_spe_info_fmts[ARM_SPE_PMU_TYPE], arr[ARM_SPE_PMU_TYPE]);
}
int arm_spe_process_auxtrace_info(union perf_event *event,
struct perf_session *session)
{
struct auxtrace_info_event *auxtrace_info = &event->auxtrace_info;
size_t min_sz = sizeof(u64) * ARM_SPE_PMU_TYPE;
struct arm_spe *spe;
int err;
if (auxtrace_info->header.size < sizeof(struct auxtrace_info_event) +
min_sz)
return -EINVAL;
spe = zalloc(sizeof(struct arm_spe));
if (!spe)
return -ENOMEM;
err = auxtrace_queues__init(&spe->queues);
if (err)
goto err_free;
spe->session = session;
spe->machine = &session->machines.host; /* No kvm support */
spe->auxtrace_type = auxtrace_info->type;
spe->pmu_type = auxtrace_info->priv[ARM_SPE_PMU_TYPE];
spe->auxtrace.process_event = arm_spe_process_event;
spe->auxtrace.process_auxtrace_event = arm_spe_process_auxtrace_event;
spe->auxtrace.flush_events = arm_spe_flush;
spe->auxtrace.free_events = arm_spe_free_events;
spe->auxtrace.free = arm_spe_free;
session->auxtrace = &spe->auxtrace;
arm_spe_print_info(&auxtrace_info->priv[0]);
return 0;
err_free:
free(spe);
return err;
}
|
