1 /* 2 * Performance counter support for POWER8 processors. 3 * 4 * Copyright 2009 Paul Mackerras, IBM Corporation. 5 * Copyright 2013 Michael Ellerman, IBM Corporation. 6 * 7 * This program is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU General Public License 9 * as published by the Free Software Foundation; either version 10 * 2 of the License, or (at your option) any later version. 11 */ 12 13 #define pr_fmt(fmt) "power8-pmu: " fmt 14 15 #include "isa207-common.h" 16 17 /* 18 * Some power8 event codes. 19 */ 20 #define EVENT(_name, _code) _name = _code, 21 22 enum { 23 #include "power8-events-list.h" 24 }; 25 26 #undef EVENT 27 28 /* MMCRA IFM bits - POWER8 */ 29 #define POWER8_MMCRA_IFM1 0x0000000040000000UL 30 #define POWER8_MMCRA_IFM2 0x0000000080000000UL 31 #define POWER8_MMCRA_IFM3 0x00000000C0000000UL 32 33 /* PowerISA v2.07 format attribute structure*/ 34 extern struct attribute_group isa207_pmu_format_group; 35 36 /* Table of alternatives, sorted by column 0 */ 37 static const unsigned int event_alternatives[][MAX_ALT] = { 38 { PM_MRK_ST_CMPL, PM_MRK_ST_CMPL_ALT }, 39 { PM_BR_MRK_2PATH, PM_BR_MRK_2PATH_ALT }, 40 { PM_L3_CO_MEPF, PM_L3_CO_MEPF_ALT }, 41 { PM_MRK_DATA_FROM_L2MISS, PM_MRK_DATA_FROM_L2MISS_ALT }, 42 { PM_CMPLU_STALL_ALT, PM_CMPLU_STALL }, 43 { PM_BR_2PATH, PM_BR_2PATH_ALT }, 44 { PM_INST_DISP, PM_INST_DISP_ALT }, 45 { PM_RUN_CYC_ALT, PM_RUN_CYC }, 46 { PM_MRK_FILT_MATCH, PM_MRK_FILT_MATCH_ALT }, 47 { PM_LD_MISS_L1, PM_LD_MISS_L1_ALT }, 48 { PM_RUN_INST_CMPL_ALT, PM_RUN_INST_CMPL }, 49 }; 50 51 static int power8_get_alternatives(u64 event, unsigned int flags, u64 alt[]) 52 { 53 int i, j, num_alt = 0; 54 55 num_alt = isa207_get_alternatives(event, alt, event_alternatives, 56 (int)ARRAY_SIZE(event_alternatives)); 57 if (flags & PPMU_ONLY_COUNT_RUN) { 58 /* 59 * We're only counting in RUN state, so PM_CYC is equivalent to 60 * PM_RUN_CYC and PM_INST_CMPL === PM_RUN_INST_CMPL. 61 */ 62 j = num_alt; 63 for (i = 0; i < num_alt; ++i) { 64 switch (alt[i]) { 65 case PM_CYC: 66 alt[j++] = PM_RUN_CYC; 67 break; 68 case PM_RUN_CYC: 69 alt[j++] = PM_CYC; 70 break; 71 case PM_INST_CMPL: 72 alt[j++] = PM_RUN_INST_CMPL; 73 break; 74 case PM_RUN_INST_CMPL: 75 alt[j++] = PM_INST_CMPL; 76 break; 77 } 78 } 79 num_alt = j; 80 } 81 82 return num_alt; 83 } 84 85 GENERIC_EVENT_ATTR(cpu-cycles, PM_CYC); 86 GENERIC_EVENT_ATTR(stalled-cycles-frontend, PM_GCT_NOSLOT_CYC); 87 GENERIC_EVENT_ATTR(stalled-cycles-backend, PM_CMPLU_STALL); 88 GENERIC_EVENT_ATTR(instructions, PM_INST_CMPL); 89 GENERIC_EVENT_ATTR(branch-instructions, PM_BRU_FIN); 90 GENERIC_EVENT_ATTR(branch-misses, PM_BR_MPRED_CMPL); 91 GENERIC_EVENT_ATTR(cache-references, PM_LD_REF_L1); 92 GENERIC_EVENT_ATTR(cache-misses, PM_LD_MISS_L1); 93 94 CACHE_EVENT_ATTR(L1-dcache-load-misses, PM_LD_MISS_L1); 95 CACHE_EVENT_ATTR(L1-dcache-loads, PM_LD_REF_L1); 96 97 CACHE_EVENT_ATTR(L1-dcache-prefetches, PM_L1_PREF); 98 CACHE_EVENT_ATTR(L1-dcache-store-misses, PM_ST_MISS_L1); 99 CACHE_EVENT_ATTR(L1-icache-load-misses, PM_L1_ICACHE_MISS); 100 CACHE_EVENT_ATTR(L1-icache-loads, PM_INST_FROM_L1); 101 CACHE_EVENT_ATTR(L1-icache-prefetches, PM_IC_PREF_WRITE); 102 103 CACHE_EVENT_ATTR(LLC-load-misses, PM_DATA_FROM_L3MISS); 104 CACHE_EVENT_ATTR(LLC-loads, PM_DATA_FROM_L3); 105 CACHE_EVENT_ATTR(LLC-prefetches, PM_L3_PREF_ALL); 106 CACHE_EVENT_ATTR(LLC-store-misses, PM_L2_ST_MISS); 107 CACHE_EVENT_ATTR(LLC-stores, PM_L2_ST); 108 109 CACHE_EVENT_ATTR(branch-load-misses, PM_BR_MPRED_CMPL); 110 CACHE_EVENT_ATTR(branch-loads, PM_BRU_FIN); 111 CACHE_EVENT_ATTR(dTLB-load-misses, PM_DTLB_MISS); 112 CACHE_EVENT_ATTR(iTLB-load-misses, PM_ITLB_MISS); 113 114 static struct attribute *power8_events_attr[] = { 115 GENERIC_EVENT_PTR(PM_CYC), 116 GENERIC_EVENT_PTR(PM_GCT_NOSLOT_CYC), 117 GENERIC_EVENT_PTR(PM_CMPLU_STALL), 118 GENERIC_EVENT_PTR(PM_INST_CMPL), 119 GENERIC_EVENT_PTR(PM_BRU_FIN), 120 GENERIC_EVENT_PTR(PM_BR_MPRED_CMPL), 121 GENERIC_EVENT_PTR(PM_LD_REF_L1), 122 GENERIC_EVENT_PTR(PM_LD_MISS_L1), 123 124 CACHE_EVENT_PTR(PM_LD_MISS_L1), 125 CACHE_EVENT_PTR(PM_LD_REF_L1), 126 CACHE_EVENT_PTR(PM_L1_PREF), 127 CACHE_EVENT_PTR(PM_ST_MISS_L1), 128 CACHE_EVENT_PTR(PM_L1_ICACHE_MISS), 129 CACHE_EVENT_PTR(PM_INST_FROM_L1), 130 CACHE_EVENT_PTR(PM_IC_PREF_WRITE), 131 CACHE_EVENT_PTR(PM_DATA_FROM_L3MISS), 132 CACHE_EVENT_PTR(PM_DATA_FROM_L3), 133 CACHE_EVENT_PTR(PM_L3_PREF_ALL), 134 CACHE_EVENT_PTR(PM_L2_ST_MISS), 135 CACHE_EVENT_PTR(PM_L2_ST), 136 137 CACHE_EVENT_PTR(PM_BR_MPRED_CMPL), 138 CACHE_EVENT_PTR(PM_BRU_FIN), 139 140 CACHE_EVENT_PTR(PM_DTLB_MISS), 141 CACHE_EVENT_PTR(PM_ITLB_MISS), 142 NULL 143 }; 144 145 static struct attribute_group power8_pmu_events_group = { 146 .name = "events", 147 .attrs = power8_events_attr, 148 }; 149 150 static const struct attribute_group *power8_pmu_attr_groups[] = { 151 &isa207_pmu_format_group, 152 &power8_pmu_events_group, 153 NULL, 154 }; 155 156 static int power8_generic_events[] = { 157 [PERF_COUNT_HW_CPU_CYCLES] = PM_CYC, 158 [PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = PM_GCT_NOSLOT_CYC, 159 [PERF_COUNT_HW_STALLED_CYCLES_BACKEND] = PM_CMPLU_STALL, 160 [PERF_COUNT_HW_INSTRUCTIONS] = PM_INST_CMPL, 161 [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = PM_BRU_FIN, 162 [PERF_COUNT_HW_BRANCH_MISSES] = PM_BR_MPRED_CMPL, 163 [PERF_COUNT_HW_CACHE_REFERENCES] = PM_LD_REF_L1, 164 [PERF_COUNT_HW_CACHE_MISSES] = PM_LD_MISS_L1, 165 }; 166 167 static u64 power8_bhrb_filter_map(u64 branch_sample_type) 168 { 169 u64 pmu_bhrb_filter = 0; 170 171 /* BHRB and regular PMU events share the same privilege state 172 * filter configuration. BHRB is always recorded along with a 173 * regular PMU event. As the privilege state filter is handled 174 * in the basic PMC configuration of the accompanying regular 175 * PMU event, we ignore any separate BHRB specific request. 176 */ 177 178 /* No branch filter requested */ 179 if (branch_sample_type & PERF_SAMPLE_BRANCH_ANY) 180 return pmu_bhrb_filter; 181 182 /* Invalid branch filter options - HW does not support */ 183 if (branch_sample_type & PERF_SAMPLE_BRANCH_ANY_RETURN) 184 return -1; 185 186 if (branch_sample_type & PERF_SAMPLE_BRANCH_IND_CALL) 187 return -1; 188 189 if (branch_sample_type & PERF_SAMPLE_BRANCH_CALL) 190 return -1; 191 192 if (branch_sample_type & PERF_SAMPLE_BRANCH_ANY_CALL) { 193 pmu_bhrb_filter |= POWER8_MMCRA_IFM1; 194 return pmu_bhrb_filter; 195 } 196 197 /* Every thing else is unsupported */ 198 return -1; 199 } 200 201 static void power8_config_bhrb(u64 pmu_bhrb_filter) 202 { 203 /* Enable BHRB filter in PMU */ 204 mtspr(SPRN_MMCRA, (mfspr(SPRN_MMCRA) | pmu_bhrb_filter)); 205 } 206 207 #define C(x) PERF_COUNT_HW_CACHE_##x 208 209 /* 210 * Table of generalized cache-related events. 211 * 0 means not supported, -1 means nonsensical, other values 212 * are event codes. 213 */ 214 static int power8_cache_events[C(MAX)][C(OP_MAX)][C(RESULT_MAX)] = { 215 [ C(L1D) ] = { 216 [ C(OP_READ) ] = { 217 [ C(RESULT_ACCESS) ] = PM_LD_REF_L1, 218 [ C(RESULT_MISS) ] = PM_LD_MISS_L1, 219 }, 220 [ C(OP_WRITE) ] = { 221 [ C(RESULT_ACCESS) ] = 0, 222 [ C(RESULT_MISS) ] = PM_ST_MISS_L1, 223 }, 224 [ C(OP_PREFETCH) ] = { 225 [ C(RESULT_ACCESS) ] = PM_L1_PREF, 226 [ C(RESULT_MISS) ] = 0, 227 }, 228 }, 229 [ C(L1I) ] = { 230 [ C(OP_READ) ] = { 231 [ C(RESULT_ACCESS) ] = PM_INST_FROM_L1, 232 [ C(RESULT_MISS) ] = PM_L1_ICACHE_MISS, 233 }, 234 [ C(OP_WRITE) ] = { 235 [ C(RESULT_ACCESS) ] = PM_L1_DEMAND_WRITE, 236 [ C(RESULT_MISS) ] = -1, 237 }, 238 [ C(OP_PREFETCH) ] = { 239 [ C(RESULT_ACCESS) ] = PM_IC_PREF_WRITE, 240 [ C(RESULT_MISS) ] = 0, 241 }, 242 }, 243 [ C(LL) ] = { 244 [ C(OP_READ) ] = { 245 [ C(RESULT_ACCESS) ] = PM_DATA_FROM_L3, 246 [ C(RESULT_MISS) ] = PM_DATA_FROM_L3MISS, 247 }, 248 [ C(OP_WRITE) ] = { 249 [ C(RESULT_ACCESS) ] = PM_L2_ST, 250 [ C(RESULT_MISS) ] = PM_L2_ST_MISS, 251 }, 252 [ C(OP_PREFETCH) ] = { 253 [ C(RESULT_ACCESS) ] = PM_L3_PREF_ALL, 254 [ C(RESULT_MISS) ] = 0, 255 }, 256 }, 257 [ C(DTLB) ] = { 258 [ C(OP_READ) ] = { 259 [ C(RESULT_ACCESS) ] = 0, 260 [ C(RESULT_MISS) ] = PM_DTLB_MISS, 261 }, 262 [ C(OP_WRITE) ] = { 263 [ C(RESULT_ACCESS) ] = -1, 264 [ C(RESULT_MISS) ] = -1, 265 }, 266 [ C(OP_PREFETCH) ] = { 267 [ C(RESULT_ACCESS) ] = -1, 268 [ C(RESULT_MISS) ] = -1, 269 }, 270 }, 271 [ C(ITLB) ] = { 272 [ C(OP_READ) ] = { 273 [ C(RESULT_ACCESS) ] = 0, 274 [ C(RESULT_MISS) ] = PM_ITLB_MISS, 275 }, 276 [ C(OP_WRITE) ] = { 277 [ C(RESULT_ACCESS) ] = -1, 278 [ C(RESULT_MISS) ] = -1, 279 }, 280 [ C(OP_PREFETCH) ] = { 281 [ C(RESULT_ACCESS) ] = -1, 282 [ C(RESULT_MISS) ] = -1, 283 }, 284 }, 285 [ C(BPU) ] = { 286 [ C(OP_READ) ] = { 287 [ C(RESULT_ACCESS) ] = PM_BRU_FIN, 288 [ C(RESULT_MISS) ] = PM_BR_MPRED_CMPL, 289 }, 290 [ C(OP_WRITE) ] = { 291 [ C(RESULT_ACCESS) ] = -1, 292 [ C(RESULT_MISS) ] = -1, 293 }, 294 [ C(OP_PREFETCH) ] = { 295 [ C(RESULT_ACCESS) ] = -1, 296 [ C(RESULT_MISS) ] = -1, 297 }, 298 }, 299 [ C(NODE) ] = { 300 [ C(OP_READ) ] = { 301 [ C(RESULT_ACCESS) ] = -1, 302 [ C(RESULT_MISS) ] = -1, 303 }, 304 [ C(OP_WRITE) ] = { 305 [ C(RESULT_ACCESS) ] = -1, 306 [ C(RESULT_MISS) ] = -1, 307 }, 308 [ C(OP_PREFETCH) ] = { 309 [ C(RESULT_ACCESS) ] = -1, 310 [ C(RESULT_MISS) ] = -1, 311 }, 312 }, 313 }; 314 315 #undef C 316 317 static struct power_pmu power8_pmu = { 318 .name = "POWER8", 319 .n_counter = MAX_PMU_COUNTERS, 320 .max_alternatives = MAX_ALT + 1, 321 .add_fields = ISA207_ADD_FIELDS, 322 .test_adder = ISA207_TEST_ADDER, 323 .compute_mmcr = isa207_compute_mmcr, 324 .config_bhrb = power8_config_bhrb, 325 .bhrb_filter_map = power8_bhrb_filter_map, 326 .get_constraint = isa207_get_constraint, 327 .get_alternatives = power8_get_alternatives, 328 .disable_pmc = isa207_disable_pmc, 329 .flags = PPMU_HAS_SIER | PPMU_ARCH_207S, 330 .n_generic = ARRAY_SIZE(power8_generic_events), 331 .generic_events = power8_generic_events, 332 .cache_events = &power8_cache_events, 333 .attr_groups = power8_pmu_attr_groups, 334 .bhrb_nr = 32, 335 }; 336 337 static int __init init_power8_pmu(void) 338 { 339 int rc; 340 341 if (!cur_cpu_spec->oprofile_cpu_type || 342 strcmp(cur_cpu_spec->oprofile_cpu_type, "ppc64/power8")) 343 return -ENODEV; 344 345 rc = register_power_pmu(&power8_pmu); 346 if (rc) 347 return rc; 348 349 /* Tell userspace that EBB is supported */ 350 cur_cpu_spec->cpu_user_features2 |= PPC_FEATURE2_EBB; 351 352 if (cpu_has_feature(CPU_FTR_PMAO_BUG)) 353 pr_info("PMAO restore workaround active.\n"); 354 355 return 0; 356 } 357 early_initcall(init_power8_pmu); 358