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_ETE_TRCDEVARCH] = " TRCDEVARCH %llx\n" 40 }; 41 42 static const char * const param_unk_fmt = 43 " Unknown parameter [%d] %"PRIx64"\n"; 44 static const char * const magic_unk_fmt = 45 " Magic number Unknown %"PRIx64"\n"; 46 47 static int cs_etm__print_cpu_metadata_v0(u64 *val, int *offset) 48 { 49 int i = *offset, j, nr_params = 0, fmt_offset; 50 u64 magic; 51 52 /* check magic value */ 53 magic = val[i + CS_ETM_MAGIC]; 54 if ((magic != __perf_cs_etmv3_magic) && 55 (magic != __perf_cs_etmv4_magic)) { 56 /* failure - note bad magic value */ 57 fprintf(stdout, magic_unk_fmt, magic); 58 return -EINVAL; 59 } 60 61 /* print common header block */ 62 fprintf(stdout, cs_etm_priv_fmts[CS_ETM_MAGIC], val[i++]); 63 fprintf(stdout, cs_etm_priv_fmts[CS_ETM_CPU], val[i++]); 64 65 if (magic == __perf_cs_etmv3_magic) { 66 nr_params = CS_ETM_NR_TRC_PARAMS_V0; 67 fmt_offset = CS_ETM_ETMCR; 68 /* after common block, offset format index past NR_PARAMS */ 69 for (j = fmt_offset; j < nr_params + fmt_offset; j++, i++) 70 fprintf(stdout, cs_etm_priv_fmts[j], val[i]); 71 } else if (magic == __perf_cs_etmv4_magic) { 72 nr_params = CS_ETMV4_NR_TRC_PARAMS_V0; 73 fmt_offset = CS_ETMV4_TRCCONFIGR; 74 /* after common block, offset format index past NR_PARAMS */ 75 for (j = fmt_offset; j < nr_params + fmt_offset; j++, i++) 76 fprintf(stdout, cs_etmv4_priv_fmts[j], val[i]); 77 } 78 *offset = i; 79 return 0; 80 } 81 82 static int cs_etm__print_cpu_metadata_v1(u64 *val, int *offset) 83 { 84 int i = *offset, j, total_params = 0; 85 u64 magic; 86 87 magic = val[i + CS_ETM_MAGIC]; 88 /* total params to print is NR_PARAMS + common block size for v1 */ 89 total_params = val[i + CS_ETM_NR_TRC_PARAMS] + CS_ETM_COMMON_BLK_MAX_V1; 90 91 if (magic == __perf_cs_etmv3_magic) { 92 for (j = 0; j < total_params; j++, i++) { 93 /* if newer record - could be excess params */ 94 if (j >= CS_ETM_PRIV_MAX) 95 fprintf(stdout, param_unk_fmt, j, val[i]); 96 else 97 fprintf(stdout, cs_etm_priv_fmts[j], val[i]); 98 } 99 } else if (magic == __perf_cs_etmv4_magic || magic == __perf_cs_ete_magic) { 100 /* 101 * ETE and ETMv4 can be printed in the same block because the number of parameters 102 * is saved and they share the list of parameter names. ETE is also only supported 103 * in V1 files. 104 */ 105 for (j = 0; j < total_params; j++, i++) { 106 /* if newer record - could be excess params */ 107 if (j >= CS_ETE_PRIV_MAX) 108 fprintf(stdout, param_unk_fmt, j, val[i]); 109 else 110 fprintf(stdout, cs_etmv4_priv_fmts[j], val[i]); 111 } 112 } else { 113 /* failure - note bad magic value and error out */ 114 fprintf(stdout, magic_unk_fmt, magic); 115 return -EINVAL; 116 } 117 *offset = i; 118 return 0; 119 } 120 121 static void cs_etm__print_auxtrace_info(u64 *val, int num) 122 { 123 int i, cpu = 0, version, err; 124 125 version = val[0]; 126 127 for (i = 0; i < CS_HEADER_VERSION_MAX; i++) 128 fprintf(stdout, cs_etm_global_header_fmts[i], val[i]); 129 130 for (i = CS_HEADER_VERSION_MAX; cpu < num; cpu++) { 131 if (version == 0) 132 err = cs_etm__print_cpu_metadata_v0(val, &i); 133 else if (version == 1) 134 err = cs_etm__print_cpu_metadata_v1(val, &i); 135 if (err) 136 return; 137 } 138 } 139 140 /* 141 * Do some basic checks and print the auxtrace info header before calling 142 * into cs_etm__process_auxtrace_info_full() which requires OpenCSD to be 143 * linked in. This allows some basic debugging if OpenCSD is missing. 144 */ 145 int cs_etm__process_auxtrace_info(union perf_event *event, 146 struct perf_session *session) 147 { 148 struct perf_record_auxtrace_info *auxtrace_info = &event->auxtrace_info; 149 int event_header_size = sizeof(struct perf_event_header); 150 int num_cpu; 151 u64 *ptr = NULL; 152 u64 hdr_version; 153 154 if (auxtrace_info->header.size < (event_header_size + INFO_HEADER_SIZE)) 155 return -EINVAL; 156 157 /* First the global part */ 158 ptr = (u64 *) auxtrace_info->priv; 159 160 /* Look for version of the header */ 161 hdr_version = ptr[0]; 162 if (hdr_version > CS_HEADER_CURRENT_VERSION) { 163 pr_err("\nCS ETM Trace: Unknown Header Version = %#" PRIx64, hdr_version); 164 pr_err(", version supported <= %x\n", CS_HEADER_CURRENT_VERSION); 165 return -EINVAL; 166 } 167 168 if (dump_trace) { 169 num_cpu = ptr[CS_PMU_TYPE_CPUS] & 0xffffffff; 170 cs_etm__print_auxtrace_info(ptr, num_cpu); 171 } 172 173 return cs_etm__process_auxtrace_info_full(event, session); 174 } 175