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 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 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 } 138 139 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 else if (version == 1) 152 err = cs_etm__print_cpu_metadata_v1(val, &i); 153 if (err) 154 return; 155 } 156 } 157 158 /* 159 * Do some basic checks and print the auxtrace info header before calling 160 * into cs_etm__process_auxtrace_info_full() which requires OpenCSD to be 161 * linked in. This allows some basic debugging if OpenCSD is missing. 162 */ 163 int cs_etm__process_auxtrace_info(union perf_event *event, 164 struct perf_session *session) 165 { 166 struct perf_record_auxtrace_info *auxtrace_info = &event->auxtrace_info; 167 int event_header_size = sizeof(struct perf_event_header); 168 int num_cpu; 169 u64 *ptr = NULL; 170 u64 hdr_version; 171 172 if (auxtrace_info->header.size < (event_header_size + INFO_HEADER_SIZE)) 173 return -EINVAL; 174 175 /* First the global part */ 176 ptr = (u64 *) auxtrace_info->priv; 177 178 /* Look for version of the header */ 179 hdr_version = ptr[0]; 180 if (hdr_version > CS_HEADER_CURRENT_VERSION) { 181 pr_err("\nCS ETM Trace: Unknown Header Version = %#" PRIx64, hdr_version); 182 pr_err(", version supported <= %x\n", CS_HEADER_CURRENT_VERSION); 183 return -EINVAL; 184 } 185 186 if (dump_trace) { 187 num_cpu = ptr[CS_PMU_TYPE_CPUS] & 0xffffffff; 188 cs_etm__print_auxtrace_info(ptr, num_cpu); 189 } 190 191 return cs_etm__process_auxtrace_info_full(event, session); 192 } 193