1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Performance counter support for POWER8 processors. 4 * 5 * Copyright 2009 Paul Mackerras, IBM Corporation. 6 * Copyright 2013 Michael Ellerman, IBM Corporation. 7 */ 8 9 #define pr_fmt(fmt) "power8-pmu: " fmt 10 11 #include "isa207-common.h" 12 13 /* 14 * Some power8 event codes. 15 */ 16 #define EVENT(_name, _code) _name = _code, 17 18 enum { 19 #include "power8-events-list.h" 20 }; 21 22 #undef EVENT 23 24 /* MMCRA IFM bits - POWER8 */ 25 #define POWER8_MMCRA_IFM1 0x0000000040000000UL 26 #define POWER8_MMCRA_IFM2 0x0000000080000000UL 27 #define POWER8_MMCRA_IFM3 0x00000000C0000000UL 28 #define POWER8_MMCRA_BHRB_MASK 0x00000000C0000000UL 29 30 /* 31 * Raw event encoding for PowerISA v2.07 (Power8): 32 * 33 * 60 56 52 48 44 40 36 32 34 * | - - - - | - - - - | - - - - | - - - - | - - - - | - - - - | - - - - | - - - - | 35 * | | [ ] [ thresh_cmp ] [ thresh_ctl ] 36 * | | | | 37 * | | *- IFM (Linux) thresh start/stop OR FAB match -* 38 * | *- BHRB (Linux) 39 * *- EBB (Linux) 40 * 41 * 28 24 20 16 12 8 4 0 42 * | - - - - | - - - - | - - - - | - - - - | - - - - | - - - - | - - - - | - - - - | 43 * [ ] [ sample ] [cache] [ pmc ] [unit ] c m [ pmcxsel ] 44 * | | | | | 45 * | | | | *- mark 46 * | | *- L1/L2/L3 cache_sel | 47 * | | | 48 * | *- sampling mode for marked events *- combine 49 * | 50 * *- thresh_sel 51 * 52 * Below uses IBM bit numbering. 53 * 54 * MMCR1[x:y] = unit (PMCxUNIT) 55 * MMCR1[x] = combine (PMCxCOMB) 56 * 57 * if pmc == 3 and unit == 0 and pmcxsel[0:6] == 0b0101011 58 * # PM_MRK_FAB_RSP_MATCH 59 * MMCR1[20:27] = thresh_ctl (FAB_CRESP_MATCH / FAB_TYPE_MATCH) 60 * else if pmc == 4 and unit == 0xf and pmcxsel[0:6] == 0b0101001 61 * # PM_MRK_FAB_RSP_MATCH_CYC 62 * MMCR1[20:27] = thresh_ctl (FAB_CRESP_MATCH / FAB_TYPE_MATCH) 63 * else 64 * MMCRA[48:55] = thresh_ctl (THRESH START/END) 65 * 66 * if thresh_sel: 67 * MMCRA[45:47] = thresh_sel 68 * 69 * if thresh_cmp: 70 * MMCRA[22:24] = thresh_cmp[0:2] 71 * MMCRA[25:31] = thresh_cmp[3:9] 72 * 73 * if unit == 6 or unit == 7 74 * MMCRC[53:55] = cache_sel[1:3] (L2EVENT_SEL) 75 * else if unit == 8 or unit == 9: 76 * if cache_sel[0] == 0: # L3 bank 77 * MMCRC[47:49] = cache_sel[1:3] (L3EVENT_SEL0) 78 * else if cache_sel[0] == 1: 79 * MMCRC[50:51] = cache_sel[2:3] (L3EVENT_SEL1) 80 * else if cache_sel[1]: # L1 event 81 * MMCR1[16] = cache_sel[2] 82 * MMCR1[17] = cache_sel[3] 83 * 84 * if mark: 85 * MMCRA[63] = 1 (SAMPLE_ENABLE) 86 * MMCRA[57:59] = sample[0:2] (RAND_SAMP_ELIG) 87 * MMCRA[61:62] = sample[3:4] (RAND_SAMP_MODE) 88 * 89 * if EBB and BHRB: 90 * MMCRA[32:33] = IFM 91 * 92 */ 93 94 /* PowerISA v2.07 format attribute structure*/ 95 extern struct attribute_group isa207_pmu_format_group; 96 97 /* Table of alternatives, sorted by column 0 */ 98 static const unsigned int event_alternatives[][MAX_ALT] = { 99 { PM_MRK_ST_CMPL, PM_MRK_ST_CMPL_ALT }, 100 { PM_BR_MRK_2PATH, PM_BR_MRK_2PATH_ALT }, 101 { PM_L3_CO_MEPF, PM_L3_CO_MEPF_ALT }, 102 { PM_MRK_DATA_FROM_L2MISS, PM_MRK_DATA_FROM_L2MISS_ALT }, 103 { PM_CMPLU_STALL_ALT, PM_CMPLU_STALL }, 104 { PM_BR_2PATH, PM_BR_2PATH_ALT }, 105 { PM_INST_DISP, PM_INST_DISP_ALT }, 106 { PM_RUN_CYC_ALT, PM_RUN_CYC }, 107 { PM_MRK_FILT_MATCH, PM_MRK_FILT_MATCH_ALT }, 108 { PM_LD_MISS_L1, PM_LD_MISS_L1_ALT }, 109 { PM_RUN_INST_CMPL_ALT, PM_RUN_INST_CMPL }, 110 }; 111 112 static int power8_get_alternatives(u64 event, unsigned int flags, u64 alt[]) 113 { 114 int num_alt = 0; 115 116 num_alt = isa207_get_alternatives(event, alt, 117 ARRAY_SIZE(event_alternatives), flags, 118 event_alternatives); 119 120 return num_alt; 121 } 122 123 GENERIC_EVENT_ATTR(cpu-cycles, PM_CYC); 124 GENERIC_EVENT_ATTR(stalled-cycles-frontend, PM_GCT_NOSLOT_CYC); 125 GENERIC_EVENT_ATTR(stalled-cycles-backend, PM_CMPLU_STALL); 126 GENERIC_EVENT_ATTR(instructions, PM_INST_CMPL); 127 GENERIC_EVENT_ATTR(branch-instructions, PM_BRU_FIN); 128 GENERIC_EVENT_ATTR(branch-misses, PM_BR_MPRED_CMPL); 129 GENERIC_EVENT_ATTR(cache-references, PM_LD_REF_L1); 130 GENERIC_EVENT_ATTR(cache-misses, PM_LD_MISS_L1); 131 GENERIC_EVENT_ATTR(mem_access, MEM_ACCESS); 132 133 CACHE_EVENT_ATTR(L1-dcache-load-misses, PM_LD_MISS_L1); 134 CACHE_EVENT_ATTR(L1-dcache-loads, PM_LD_REF_L1); 135 136 CACHE_EVENT_ATTR(L1-dcache-prefetches, PM_L1_PREF); 137 CACHE_EVENT_ATTR(L1-dcache-store-misses, PM_ST_MISS_L1); 138 CACHE_EVENT_ATTR(L1-icache-load-misses, PM_L1_ICACHE_MISS); 139 CACHE_EVENT_ATTR(L1-icache-loads, PM_INST_FROM_L1); 140 CACHE_EVENT_ATTR(L1-icache-prefetches, PM_IC_PREF_WRITE); 141 142 CACHE_EVENT_ATTR(LLC-load-misses, PM_DATA_FROM_L3MISS); 143 CACHE_EVENT_ATTR(LLC-loads, PM_DATA_FROM_L3); 144 CACHE_EVENT_ATTR(LLC-prefetches, PM_L3_PREF_ALL); 145 CACHE_EVENT_ATTR(LLC-store-misses, PM_L2_ST_MISS); 146 CACHE_EVENT_ATTR(LLC-stores, PM_L2_ST); 147 148 CACHE_EVENT_ATTR(branch-load-misses, PM_BR_MPRED_CMPL); 149 CACHE_EVENT_ATTR(branch-loads, PM_BRU_FIN); 150 CACHE_EVENT_ATTR(dTLB-load-misses, PM_DTLB_MISS); 151 CACHE_EVENT_ATTR(iTLB-load-misses, PM_ITLB_MISS); 152 153 static struct attribute *power8_events_attr[] = { 154 GENERIC_EVENT_PTR(PM_CYC), 155 GENERIC_EVENT_PTR(PM_GCT_NOSLOT_CYC), 156 GENERIC_EVENT_PTR(PM_CMPLU_STALL), 157 GENERIC_EVENT_PTR(PM_INST_CMPL), 158 GENERIC_EVENT_PTR(PM_BRU_FIN), 159 GENERIC_EVENT_PTR(PM_BR_MPRED_CMPL), 160 GENERIC_EVENT_PTR(PM_LD_REF_L1), 161 GENERIC_EVENT_PTR(PM_LD_MISS_L1), 162 GENERIC_EVENT_PTR(MEM_ACCESS), 163 164 CACHE_EVENT_PTR(PM_LD_MISS_L1), 165 CACHE_EVENT_PTR(PM_LD_REF_L1), 166 CACHE_EVENT_PTR(PM_L1_PREF), 167 CACHE_EVENT_PTR(PM_ST_MISS_L1), 168 CACHE_EVENT_PTR(PM_L1_ICACHE_MISS), 169 CACHE_EVENT_PTR(PM_INST_FROM_L1), 170 CACHE_EVENT_PTR(PM_IC_PREF_WRITE), 171 CACHE_EVENT_PTR(PM_DATA_FROM_L3MISS), 172 CACHE_EVENT_PTR(PM_DATA_FROM_L3), 173 CACHE_EVENT_PTR(PM_L3_PREF_ALL), 174 CACHE_EVENT_PTR(PM_L2_ST_MISS), 175 CACHE_EVENT_PTR(PM_L2_ST), 176 177 CACHE_EVENT_PTR(PM_BR_MPRED_CMPL), 178 CACHE_EVENT_PTR(PM_BRU_FIN), 179 180 CACHE_EVENT_PTR(PM_DTLB_MISS), 181 CACHE_EVENT_PTR(PM_ITLB_MISS), 182 NULL 183 }; 184 185 static struct attribute_group power8_pmu_events_group = { 186 .name = "events", 187 .attrs = power8_events_attr, 188 }; 189 190 static const struct attribute_group *power8_pmu_attr_groups[] = { 191 &isa207_pmu_format_group, 192 &power8_pmu_events_group, 193 NULL, 194 }; 195 196 static int power8_generic_events[] = { 197 [PERF_COUNT_HW_CPU_CYCLES] = PM_CYC, 198 [PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = PM_GCT_NOSLOT_CYC, 199 [PERF_COUNT_HW_STALLED_CYCLES_BACKEND] = PM_CMPLU_STALL, 200 [PERF_COUNT_HW_INSTRUCTIONS] = PM_INST_CMPL, 201 [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = PM_BRU_FIN, 202 [PERF_COUNT_HW_BRANCH_MISSES] = PM_BR_MPRED_CMPL, 203 [PERF_COUNT_HW_CACHE_REFERENCES] = PM_LD_REF_L1, 204 [PERF_COUNT_HW_CACHE_MISSES] = PM_LD_MISS_L1, 205 }; 206 207 static u64 power8_bhrb_filter_map(u64 branch_sample_type) 208 { 209 u64 pmu_bhrb_filter = 0; 210 211 /* BHRB and regular PMU events share the same privilege state 212 * filter configuration. BHRB is always recorded along with a 213 * regular PMU event. As the privilege state filter is handled 214 * in the basic PMC configuration of the accompanying regular 215 * PMU event, we ignore any separate BHRB specific request. 216 */ 217 218 /* No branch filter requested */ 219 if (branch_sample_type & PERF_SAMPLE_BRANCH_ANY) 220 return pmu_bhrb_filter; 221 222 /* Invalid branch filter options - HW does not support */ 223 if (branch_sample_type & PERF_SAMPLE_BRANCH_ANY_RETURN) 224 return -1; 225 226 if (branch_sample_type & PERF_SAMPLE_BRANCH_IND_CALL) 227 return -1; 228 229 if (branch_sample_type & PERF_SAMPLE_BRANCH_CALL) 230 return -1; 231 232 if (branch_sample_type & PERF_SAMPLE_BRANCH_ANY_CALL) { 233 pmu_bhrb_filter |= POWER8_MMCRA_IFM1; 234 return pmu_bhrb_filter; 235 } 236 237 /* Every thing else is unsupported */ 238 return -1; 239 } 240 241 static void power8_config_bhrb(u64 pmu_bhrb_filter) 242 { 243 pmu_bhrb_filter &= POWER8_MMCRA_BHRB_MASK; 244 245 /* Enable BHRB filter in PMU */ 246 mtspr(SPRN_MMCRA, (mfspr(SPRN_MMCRA) | pmu_bhrb_filter)); 247 } 248 249 #define C(x) PERF_COUNT_HW_CACHE_##x 250 251 /* 252 * Table of generalized cache-related events. 253 * 0 means not supported, -1 means nonsensical, other values 254 * are event codes. 255 */ 256 static u64 power8_cache_events[C(MAX)][C(OP_MAX)][C(RESULT_MAX)] = { 257 [ C(L1D) ] = { 258 [ C(OP_READ) ] = { 259 [ C(RESULT_ACCESS) ] = PM_LD_REF_L1, 260 [ C(RESULT_MISS) ] = PM_LD_MISS_L1, 261 }, 262 [ C(OP_WRITE) ] = { 263 [ C(RESULT_ACCESS) ] = 0, 264 [ C(RESULT_MISS) ] = PM_ST_MISS_L1, 265 }, 266 [ C(OP_PREFETCH) ] = { 267 [ C(RESULT_ACCESS) ] = PM_L1_PREF, 268 [ C(RESULT_MISS) ] = 0, 269 }, 270 }, 271 [ C(L1I) ] = { 272 [ C(OP_READ) ] = { 273 [ C(RESULT_ACCESS) ] = PM_INST_FROM_L1, 274 [ C(RESULT_MISS) ] = PM_L1_ICACHE_MISS, 275 }, 276 [ C(OP_WRITE) ] = { 277 [ C(RESULT_ACCESS) ] = PM_L1_DEMAND_WRITE, 278 [ C(RESULT_MISS) ] = -1, 279 }, 280 [ C(OP_PREFETCH) ] = { 281 [ C(RESULT_ACCESS) ] = PM_IC_PREF_WRITE, 282 [ C(RESULT_MISS) ] = 0, 283 }, 284 }, 285 [ C(LL) ] = { 286 [ C(OP_READ) ] = { 287 [ C(RESULT_ACCESS) ] = PM_DATA_FROM_L3, 288 [ C(RESULT_MISS) ] = PM_DATA_FROM_L3MISS, 289 }, 290 [ C(OP_WRITE) ] = { 291 [ C(RESULT_ACCESS) ] = PM_L2_ST, 292 [ C(RESULT_MISS) ] = PM_L2_ST_MISS, 293 }, 294 [ C(OP_PREFETCH) ] = { 295 [ C(RESULT_ACCESS) ] = PM_L3_PREF_ALL, 296 [ C(RESULT_MISS) ] = 0, 297 }, 298 }, 299 [ C(DTLB) ] = { 300 [ C(OP_READ) ] = { 301 [ C(RESULT_ACCESS) ] = 0, 302 [ C(RESULT_MISS) ] = PM_DTLB_MISS, 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 [ C(ITLB) ] = { 314 [ C(OP_READ) ] = { 315 [ C(RESULT_ACCESS) ] = 0, 316 [ C(RESULT_MISS) ] = PM_ITLB_MISS, 317 }, 318 [ C(OP_WRITE) ] = { 319 [ C(RESULT_ACCESS) ] = -1, 320 [ C(RESULT_MISS) ] = -1, 321 }, 322 [ C(OP_PREFETCH) ] = { 323 [ C(RESULT_ACCESS) ] = -1, 324 [ C(RESULT_MISS) ] = -1, 325 }, 326 }, 327 [ C(BPU) ] = { 328 [ C(OP_READ) ] = { 329 [ C(RESULT_ACCESS) ] = PM_BRU_FIN, 330 [ C(RESULT_MISS) ] = PM_BR_MPRED_CMPL, 331 }, 332 [ C(OP_WRITE) ] = { 333 [ C(RESULT_ACCESS) ] = -1, 334 [ C(RESULT_MISS) ] = -1, 335 }, 336 [ C(OP_PREFETCH) ] = { 337 [ C(RESULT_ACCESS) ] = -1, 338 [ C(RESULT_MISS) ] = -1, 339 }, 340 }, 341 [ C(NODE) ] = { 342 [ C(OP_READ) ] = { 343 [ C(RESULT_ACCESS) ] = -1, 344 [ C(RESULT_MISS) ] = -1, 345 }, 346 [ C(OP_WRITE) ] = { 347 [ C(RESULT_ACCESS) ] = -1, 348 [ C(RESULT_MISS) ] = -1, 349 }, 350 [ C(OP_PREFETCH) ] = { 351 [ C(RESULT_ACCESS) ] = -1, 352 [ C(RESULT_MISS) ] = -1, 353 }, 354 }, 355 }; 356 357 #undef C 358 359 static struct power_pmu power8_pmu = { 360 .name = "POWER8", 361 .n_counter = MAX_PMU_COUNTERS, 362 .max_alternatives = MAX_ALT + 1, 363 .add_fields = ISA207_ADD_FIELDS, 364 .test_adder = ISA207_TEST_ADDER, 365 .compute_mmcr = isa207_compute_mmcr, 366 .config_bhrb = power8_config_bhrb, 367 .bhrb_filter_map = power8_bhrb_filter_map, 368 .get_constraint = isa207_get_constraint, 369 .get_alternatives = power8_get_alternatives, 370 .get_mem_data_src = isa207_get_mem_data_src, 371 .get_mem_weight = isa207_get_mem_weight, 372 .disable_pmc = isa207_disable_pmc, 373 .flags = PPMU_HAS_SIER | PPMU_ARCH_207S, 374 .n_generic = ARRAY_SIZE(power8_generic_events), 375 .generic_events = power8_generic_events, 376 .cache_events = &power8_cache_events, 377 .attr_groups = power8_pmu_attr_groups, 378 .bhrb_nr = 32, 379 }; 380 381 int __init init_power8_pmu(void) 382 { 383 int rc; 384 385 if (!cur_cpu_spec->oprofile_cpu_type || 386 strcmp(cur_cpu_spec->oprofile_cpu_type, "ppc64/power8")) 387 return -ENODEV; 388 389 rc = register_power_pmu(&power8_pmu); 390 if (rc) 391 return rc; 392 393 /* Tell userspace that EBB is supported */ 394 cur_cpu_spec->cpu_user_features2 |= PPC_FEATURE2_EBB; 395 396 if (cpu_has_feature(CPU_FTR_PMAO_BUG)) 397 pr_info("PMAO restore workaround active.\n"); 398 399 return 0; 400 } 401