summaryrefslogtreecommitdiffstats
path: root/tools/perf/util/cs-etm-base.c
blob: 4abe416e3febd2cc0ae88da588e05d3175865709 (plain)
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
// SPDX-License-Identifier: GPL-2.0
/*
 * File for any parts of the Coresight decoding that don't require
 * OpenCSD.
 */

#include <errno.h>
#include <inttypes.h>

#include "cs-etm.h"

static const char * const cs_etm_global_header_fmts[] = {
	[CS_HEADER_VERSION]	= "	Header version		       %llx\n",
	[CS_PMU_TYPE_CPUS]	= "	PMU type/num cpus	       %llx\n",
	[CS_ETM_SNAPSHOT]	= "	Snapshot		       %llx\n",
};

static const char * const cs_etm_priv_fmts[] = {
	[CS_ETM_MAGIC]		= "	Magic number		       %llx\n",
	[CS_ETM_CPU]		= "	CPU			       %lld\n",
	[CS_ETM_NR_TRC_PARAMS]	= "	NR_TRC_PARAMS		       %llx\n",
	[CS_ETM_ETMCR]		= "	ETMCR			       %llx\n",
	[CS_ETM_ETMTRACEIDR]	= "	ETMTRACEIDR		       %llx\n",
	[CS_ETM_ETMCCER]	= "	ETMCCER			       %llx\n",
	[CS_ETM_ETMIDR]		= "	ETMIDR			       %llx\n",
};

static const char * const cs_etmv4_priv_fmts[] = {
	[CS_ETM_MAGIC]		= "	Magic number		       %llx\n",
	[CS_ETM_CPU]		= "	CPU			       %lld\n",
	[CS_ETM_NR_TRC_PARAMS]	= "	NR_TRC_PARAMS		       %llx\n",
	[CS_ETMV4_TRCCONFIGR]	= "	TRCCONFIGR		       %llx\n",
	[CS_ETMV4_TRCTRACEIDR]	= "	TRCTRACEIDR		       %llx\n",
	[CS_ETMV4_TRCIDR0]	= "	TRCIDR0			       %llx\n",
	[CS_ETMV4_TRCIDR1]	= "	TRCIDR1			       %llx\n",
	[CS_ETMV4_TRCIDR2]	= "	TRCIDR2			       %llx\n",
	[CS_ETMV4_TRCIDR8]	= "	TRCIDR8			       %llx\n",
	[CS_ETMV4_TRCAUTHSTATUS] = "	TRCAUTHSTATUS		       %llx\n",
	[CS_ETMV4_TS_SOURCE]	= "	TS_SOURCE		       %lld\n",
};

static const char * const cs_ete_priv_fmts[] = {
	[CS_ETM_MAGIC]		= "	Magic number		       %llx\n",
	[CS_ETM_CPU]		= "	CPU			       %lld\n",
	[CS_ETM_NR_TRC_PARAMS]	= "	NR_TRC_PARAMS		       %llx\n",
	[CS_ETE_TRCCONFIGR]	= "	TRCCONFIGR		       %llx\n",
	[CS_ETE_TRCTRACEIDR]	= "	TRCTRACEIDR		       %llx\n",
	[CS_ETE_TRCIDR0]	= "	TRCIDR0			       %llx\n",
	[CS_ETE_TRCIDR1]	= "	TRCIDR1			       %llx\n",
	[CS_ETE_TRCIDR2]	= "	TRCIDR2			       %llx\n",
	[CS_ETE_TRCIDR8]	= "	TRCIDR8			       %llx\n",
	[CS_ETE_TRCAUTHSTATUS]	= "	TRCAUTHSTATUS		       %llx\n",
	[CS_ETE_TRCDEVARCH]	= "	TRCDEVARCH                     %llx\n",
	[CS_ETE_TS_SOURCE]	= "	TS_SOURCE                      %lld\n",
};

static const char * const param_unk_fmt =
	"	Unknown parameter [%d]	       %"PRIx64"\n";
static const char * const magic_unk_fmt =
	"	Magic number Unknown	       %"PRIx64"\n";

static int cs_etm__print_cpu_metadata_v0(u64 *val, int *offset)
{
	int i = *offset, j, nr_params = 0, fmt_offset;
	u64 magic;

	/* check magic value */
	magic = val[i + CS_ETM_MAGIC];
	if ((magic != __perf_cs_etmv3_magic) &&
	    (magic != __perf_cs_etmv4_magic)) {
		/* failure - note bad magic value */
		fprintf(stdout, magic_unk_fmt, magic);
		return -EINVAL;
	}

	/* print common header block */
	fprintf(stdout, cs_etm_priv_fmts[CS_ETM_MAGIC], val[i++]);
	fprintf(stdout, cs_etm_priv_fmts[CS_ETM_CPU], val[i++]);

	if (magic == __perf_cs_etmv3_magic) {
		nr_params = CS_ETM_NR_TRC_PARAMS_V0;
		fmt_offset = CS_ETM_ETMCR;
		/* after common block, offset format index past NR_PARAMS */
		for (j = fmt_offset; j < nr_params + fmt_offset; j++, i++)
			fprintf(stdout, cs_etm_priv_fmts[j], val[i]);
	} else if (magic == __perf_cs_etmv4_magic) {
		nr_params = CS_ETMV4_NR_TRC_PARAMS_V0;
		fmt_offset = CS_ETMV4_TRCCONFIGR;
		/* after common block, offset format index past NR_PARAMS */
		for (j = fmt_offset; j < nr_params + fmt_offset; j++, i++)
			fprintf(stdout, cs_etmv4_priv_fmts[j], val[i]);
	}
	*offset = i;
	return 0;
}

static int cs_etm__print_cpu_metadata_v1(u64 *val, int *offset)
{
	int i = *offset, j, total_params = 0;
	u64 magic;

	magic = val[i + CS_ETM_MAGIC];
	/* total params to print is NR_PARAMS + common block size for v1 */
	total_params = val[i + CS_ETM_NR_TRC_PARAMS] + CS_ETM_COMMON_BLK_MAX_V1;

	if (magic == __perf_cs_etmv3_magic) {
		for (j = 0; j < total_params; j++, i++) {
			/* if newer record - could be excess params */
			if (j >= CS_ETM_PRIV_MAX)
				fprintf(stdout, param_unk_fmt, j, val[i]);
			else
				fprintf(stdout, cs_etm_priv_fmts[j], val[i]);
		}
	} else if (magic == __perf_cs_etmv4_magic) {
		for (j = 0; j < total_params; j++, i++) {
			/* if newer record - could be excess params */
			if (j >= CS_ETMV4_PRIV_MAX)
				fprintf(stdout, param_unk_fmt, j, val[i]);
			else
				fprintf(stdout, cs_etmv4_priv_fmts[j], val[i]);
		}
	} else if (magic == __perf_cs_ete_magic) {
		for (j = 0; j < total_params; j++, i++) {
			/* if newer record - could be excess params */
			if (j >= CS_ETE_PRIV_MAX)
				fprintf(stdout, param_unk_fmt, j, val[i]);
			else
				fprintf(stdout, cs_ete_priv_fmts[j], val[i]);
		}
	} else {
		/* failure - note bad magic value and error out */
		fprintf(stdout, magic_unk_fmt, magic);
		return -EINVAL;
	}
	*offset = i;
	return 0;
}

static void cs_etm__print_auxtrace_info(u64 *val, int num)
{
	int i, cpu = 0, version, err;

	version = val[0];

	for (i = 0; i < CS_HEADER_VERSION_MAX; i++)
		fprintf(stdout, cs_etm_global_header_fmts[i], val[i]);

	for (i = CS_HEADER_VERSION_MAX; cpu < num; cpu++) {
		if (version == 0)
			err = cs_etm__print_cpu_metadata_v0(val, &i);
		/* printing same for both, but value bit flags added on v2 */
		else if ((version == 1) || (version == 2))
			err = cs_etm__print_cpu_metadata_v1(val, &i);
		if (err)
			return;
	}
}

/*
 * Do some basic checks and print the auxtrace info header before calling
 * into cs_etm__process_auxtrace_info_full() which requires OpenCSD to be
 * linked in. This allows some basic debugging if OpenCSD is missing.
 */
int cs_etm__process_auxtrace_info(union perf_event *event,
				  struct perf_session *session)
{
	struct perf_record_auxtrace_info *auxtrace_info = &event->auxtrace_info;
	int event_header_size = sizeof(struct perf_event_header);
	int num_cpu;
	u64 *ptr = NULL;
	u64 hdr_version;

	if (auxtrace_info->header.size < (event_header_size + INFO_HEADER_SIZE))
		return -EINVAL;

	/* First the global part */
	ptr = (u64 *) auxtrace_info->priv;

	/* Look for version of the header */
	hdr_version = ptr[0];
	if (hdr_version > CS_HEADER_CURRENT_VERSION) {
		pr_err("\nCS ETM Trace: Unknown Header Version = %#" PRIx64, hdr_version);
		pr_err(", version supported <= %x\n", CS_HEADER_CURRENT_VERSION);
		return -EINVAL;
	}

	if (dump_trace) {
		num_cpu = ptr[CS_PMU_TYPE_CPUS] & 0xffffffff;
		cs_etm__print_auxtrace_info(ptr, num_cpu);
	}

	return cs_etm__process_auxtrace_info_full(event, session);
}