xref: /linux/tools/perf/util/cs-etm-base.c (revision 1ac731c529cd4d6adbce134754b51ff7d822b145)
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * File for any parts of the Coresight decoding that don't require
4  * OpenCSD.
5  */
6 
7 #include <errno.h>
8 #include <inttypes.h>
9 
10 #include "cs-etm.h"
11 
12 static const char * const cs_etm_global_header_fmts[] = {
13 	[CS_HEADER_VERSION]	= "	Header version		       %llx\n",
14 	[CS_PMU_TYPE_CPUS]	= "	PMU type/num cpus	       %llx\n",
15 	[CS_ETM_SNAPSHOT]	= "	Snapshot		       %llx\n",
16 };
17 
18 static const char * const cs_etm_priv_fmts[] = {
19 	[CS_ETM_MAGIC]		= "	Magic number		       %llx\n",
20 	[CS_ETM_CPU]		= "	CPU			       %lld\n",
21 	[CS_ETM_NR_TRC_PARAMS]	= "	NR_TRC_PARAMS		       %llx\n",
22 	[CS_ETM_ETMCR]		= "	ETMCR			       %llx\n",
23 	[CS_ETM_ETMTRACEIDR]	= "	ETMTRACEIDR		       %llx\n",
24 	[CS_ETM_ETMCCER]	= "	ETMCCER			       %llx\n",
25 	[CS_ETM_ETMIDR]		= "	ETMIDR			       %llx\n",
26 };
27 
28 static const char * const cs_etmv4_priv_fmts[] = {
29 	[CS_ETM_MAGIC]		= "	Magic number		       %llx\n",
30 	[CS_ETM_CPU]		= "	CPU			       %lld\n",
31 	[CS_ETM_NR_TRC_PARAMS]	= "	NR_TRC_PARAMS		       %llx\n",
32 	[CS_ETMV4_TRCCONFIGR]	= "	TRCCONFIGR		       %llx\n",
33 	[CS_ETMV4_TRCTRACEIDR]	= "	TRCTRACEIDR		       %llx\n",
34 	[CS_ETMV4_TRCIDR0]	= "	TRCIDR0			       %llx\n",
35 	[CS_ETMV4_TRCIDR1]	= "	TRCIDR1			       %llx\n",
36 	[CS_ETMV4_TRCIDR2]	= "	TRCIDR2			       %llx\n",
37 	[CS_ETMV4_TRCIDR8]	= "	TRCIDR8			       %llx\n",
38 	[CS_ETMV4_TRCAUTHSTATUS] = "	TRCAUTHSTATUS		       %llx\n",
39 	[CS_ETMV4_TS_SOURCE]	= "	TS_SOURCE		       %lld\n",
40 };
41 
42 static const char * const cs_ete_priv_fmts[] = {
43 	[CS_ETM_MAGIC]		= "	Magic number		       %llx\n",
44 	[CS_ETM_CPU]		= "	CPU			       %lld\n",
45 	[CS_ETM_NR_TRC_PARAMS]	= "	NR_TRC_PARAMS		       %llx\n",
46 	[CS_ETE_TRCCONFIGR]	= "	TRCCONFIGR		       %llx\n",
47 	[CS_ETE_TRCTRACEIDR]	= "	TRCTRACEIDR		       %llx\n",
48 	[CS_ETE_TRCIDR0]	= "	TRCIDR0			       %llx\n",
49 	[CS_ETE_TRCIDR1]	= "	TRCIDR1			       %llx\n",
50 	[CS_ETE_TRCIDR2]	= "	TRCIDR2			       %llx\n",
51 	[CS_ETE_TRCIDR8]	= "	TRCIDR8			       %llx\n",
52 	[CS_ETE_TRCAUTHSTATUS]	= "	TRCAUTHSTATUS		       %llx\n",
53 	[CS_ETE_TRCDEVARCH]	= "	TRCDEVARCH                     %llx\n",
54 	[CS_ETE_TS_SOURCE]	= "	TS_SOURCE                      %lld\n",
55 };
56 
57 static const char * const param_unk_fmt =
58 	"	Unknown parameter [%d]	       %"PRIx64"\n";
59 static const char * const magic_unk_fmt =
60 	"	Magic number Unknown	       %"PRIx64"\n";
61 
cs_etm__print_cpu_metadata_v0(u64 * val,int * offset)62 static int cs_etm__print_cpu_metadata_v0(u64 *val, int *offset)
63 {
64 	int i = *offset, j, nr_params = 0, fmt_offset;
65 	u64 magic;
66 
67 	/* check magic value */
68 	magic = val[i + CS_ETM_MAGIC];
69 	if ((magic != __perf_cs_etmv3_magic) &&
70 	    (magic != __perf_cs_etmv4_magic)) {
71 		/* failure - note bad magic value */
72 		fprintf(stdout, magic_unk_fmt, magic);
73 		return -EINVAL;
74 	}
75 
76 	/* print common header block */
77 	fprintf(stdout, cs_etm_priv_fmts[CS_ETM_MAGIC], val[i++]);
78 	fprintf(stdout, cs_etm_priv_fmts[CS_ETM_CPU], val[i++]);
79 
80 	if (magic == __perf_cs_etmv3_magic) {
81 		nr_params = CS_ETM_NR_TRC_PARAMS_V0;
82 		fmt_offset = CS_ETM_ETMCR;
83 		/* after common block, offset format index past NR_PARAMS */
84 		for (j = fmt_offset; j < nr_params + fmt_offset; j++, i++)
85 			fprintf(stdout, cs_etm_priv_fmts[j], val[i]);
86 	} else if (magic == __perf_cs_etmv4_magic) {
87 		nr_params = CS_ETMV4_NR_TRC_PARAMS_V0;
88 		fmt_offset = CS_ETMV4_TRCCONFIGR;
89 		/* after common block, offset format index past NR_PARAMS */
90 		for (j = fmt_offset; j < nr_params + fmt_offset; j++, i++)
91 			fprintf(stdout, cs_etmv4_priv_fmts[j], val[i]);
92 	}
93 	*offset = i;
94 	return 0;
95 }
96 
cs_etm__print_cpu_metadata_v1(u64 * val,int * offset)97 static int cs_etm__print_cpu_metadata_v1(u64 *val, int *offset)
98 {
99 	int i = *offset, j, total_params = 0;
100 	u64 magic;
101 
102 	magic = val[i + CS_ETM_MAGIC];
103 	/* total params to print is NR_PARAMS + common block size for v1 */
104 	total_params = val[i + CS_ETM_NR_TRC_PARAMS] + CS_ETM_COMMON_BLK_MAX_V1;
105 
106 	if (magic == __perf_cs_etmv3_magic) {
107 		for (j = 0; j < total_params; j++, i++) {
108 			/* if newer record - could be excess params */
109 			if (j >= CS_ETM_PRIV_MAX)
110 				fprintf(stdout, param_unk_fmt, j, val[i]);
111 			else
112 				fprintf(stdout, cs_etm_priv_fmts[j], val[i]);
113 		}
114 	} else if (magic == __perf_cs_etmv4_magic) {
115 		for (j = 0; j < total_params; j++, i++) {
116 			/* if newer record - could be excess params */
117 			if (j >= CS_ETMV4_PRIV_MAX)
118 				fprintf(stdout, param_unk_fmt, j, val[i]);
119 			else
120 				fprintf(stdout, cs_etmv4_priv_fmts[j], val[i]);
121 		}
122 	} else if (magic == __perf_cs_ete_magic) {
123 		for (j = 0; j < total_params; j++, i++) {
124 			/* if newer record - could be excess params */
125 			if (j >= CS_ETE_PRIV_MAX)
126 				fprintf(stdout, param_unk_fmt, j, val[i]);
127 			else
128 				fprintf(stdout, cs_ete_priv_fmts[j], val[i]);
129 		}
130 	} else {
131 		/* failure - note bad magic value and error out */
132 		fprintf(stdout, magic_unk_fmt, magic);
133 		return -EINVAL;
134 	}
135 	*offset = i;
136 	return 0;
137 }
138 
cs_etm__print_auxtrace_info(u64 * val,int num)139 static void cs_etm__print_auxtrace_info(u64 *val, int num)
140 {
141 	int i, cpu = 0, version, err;
142 
143 	version = val[0];
144 
145 	for (i = 0; i < CS_HEADER_VERSION_MAX; i++)
146 		fprintf(stdout, cs_etm_global_header_fmts[i], val[i]);
147 
148 	for (i = CS_HEADER_VERSION_MAX; cpu < num; cpu++) {
149 		if (version == 0)
150 			err = cs_etm__print_cpu_metadata_v0(val, &i);
151 		/* printing same for both, but value bit flags added on v2 */
152 		else if ((version == 1) || (version == 2))
153 			err = cs_etm__print_cpu_metadata_v1(val, &i);
154 		if (err)
155 			return;
156 	}
157 }
158 
159 /*
160  * Do some basic checks and print the auxtrace info header before calling
161  * into cs_etm__process_auxtrace_info_full() which requires OpenCSD to be
162  * linked in. This allows some basic debugging if OpenCSD is missing.
163  */
cs_etm__process_auxtrace_info(union perf_event * event,struct perf_session * session)164 int cs_etm__process_auxtrace_info(union perf_event *event,
165 				  struct perf_session *session)
166 {
167 	struct perf_record_auxtrace_info *auxtrace_info = &event->auxtrace_info;
168 	int event_header_size = sizeof(struct perf_event_header);
169 	int num_cpu;
170 	u64 *ptr = NULL;
171 	u64 hdr_version;
172 
173 	if (auxtrace_info->header.size < (event_header_size + INFO_HEADER_SIZE))
174 		return -EINVAL;
175 
176 	/* First the global part */
177 	ptr = (u64 *) auxtrace_info->priv;
178 
179 	/* Look for version of the header */
180 	hdr_version = ptr[0];
181 	if (hdr_version > CS_HEADER_CURRENT_VERSION) {
182 		pr_err("\nCS ETM Trace: Unknown Header Version = %#" PRIx64, hdr_version);
183 		pr_err(", version supported <= %x\n", CS_HEADER_CURRENT_VERSION);
184 		return -EINVAL;
185 	}
186 
187 	if (dump_trace) {
188 		num_cpu = ptr[CS_PMU_TYPE_CPUS] & 0xffffffff;
189 		cs_etm__print_auxtrace_info(ptr, num_cpu);
190 	}
191 
192 	return cs_etm__process_auxtrace_info_full(event, session);
193 }
194