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 const 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 const struct attribute_group power8_pmu_events_group = { 186 .name = "events", 187 .attrs = power8_events_attr, 188 }; 189 190 static struct attribute *power8_pmu_caps_attrs[] = { 191 NULL 192 }; 193 194 static struct attribute_group power8_pmu_caps_group = { 195 .name = "caps", 196 .attrs = power8_pmu_caps_attrs, 197 }; 198 199 static const struct attribute_group *power8_pmu_attr_groups[] = { 200 &isa207_pmu_format_group, 201 &power8_pmu_events_group, 202 &power8_pmu_caps_group, 203 NULL, 204 }; 205 206 static int power8_generic_events[] = { 207 [PERF_COUNT_HW_CPU_CYCLES] = PM_CYC, 208 [PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = PM_GCT_NOSLOT_CYC, 209 [PERF_COUNT_HW_STALLED_CYCLES_BACKEND] = PM_CMPLU_STALL, 210 [PERF_COUNT_HW_INSTRUCTIONS] = PM_INST_CMPL, 211 [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = PM_BRU_FIN, 212 [PERF_COUNT_HW_BRANCH_MISSES] = PM_BR_MPRED_CMPL, 213 [PERF_COUNT_HW_CACHE_REFERENCES] = PM_LD_REF_L1, 214 [PERF_COUNT_HW_CACHE_MISSES] = PM_LD_MISS_L1, 215 }; 216 217 static u64 power8_bhrb_filter_map(u64 branch_sample_type) 218 { 219 u64 pmu_bhrb_filter = 0; 220 221 /* BHRB and regular PMU events share the same privilege state 222 * filter configuration. BHRB is always recorded along with a 223 * regular PMU event. As the privilege state filter is handled 224 * in the basic PMC configuration of the accompanying regular 225 * PMU event, we ignore any separate BHRB specific request. 226 */ 227 228 /* No branch filter requested */ 229 if (branch_sample_type & PERF_SAMPLE_BRANCH_ANY) 230 return pmu_bhrb_filter; 231 232 /* Invalid branch filter options - HW does not support */ 233 if (branch_sample_type & PERF_SAMPLE_BRANCH_ANY_RETURN) 234 return -1; 235 236 if (branch_sample_type & PERF_SAMPLE_BRANCH_IND_CALL) 237 return -1; 238 239 if (branch_sample_type & PERF_SAMPLE_BRANCH_CALL) 240 return -1; 241 242 if (branch_sample_type & PERF_SAMPLE_BRANCH_ANY_CALL) { 243 pmu_bhrb_filter |= POWER8_MMCRA_IFM1; 244 return pmu_bhrb_filter; 245 } 246 247 /* Every thing else is unsupported */ 248 return -1; 249 } 250 251 static void power8_config_bhrb(u64 pmu_bhrb_filter) 252 { 253 pmu_bhrb_filter &= POWER8_MMCRA_BHRB_MASK; 254 255 /* Enable BHRB filter in PMU */ 256 mtspr(SPRN_MMCRA, (mfspr(SPRN_MMCRA) | pmu_bhrb_filter)); 257 } 258 259 #define C(x) PERF_COUNT_HW_CACHE_##x 260 261 /* 262 * Table of generalized cache-related events. 263 * 0 means not supported, -1 means nonsensical, other values 264 * are event codes. 265 */ 266 static u64 power8_cache_events[C(MAX)][C(OP_MAX)][C(RESULT_MAX)] = { 267 [ C(L1D) ] = { 268 [ C(OP_READ) ] = { 269 [ C(RESULT_ACCESS) ] = PM_LD_REF_L1, 270 [ C(RESULT_MISS) ] = PM_LD_MISS_L1, 271 }, 272 [ C(OP_WRITE) ] = { 273 [ C(RESULT_ACCESS) ] = 0, 274 [ C(RESULT_MISS) ] = PM_ST_MISS_L1, 275 }, 276 [ C(OP_PREFETCH) ] = { 277 [ C(RESULT_ACCESS) ] = PM_L1_PREF, 278 [ C(RESULT_MISS) ] = 0, 279 }, 280 }, 281 [ C(L1I) ] = { 282 [ C(OP_READ) ] = { 283 [ C(RESULT_ACCESS) ] = PM_INST_FROM_L1, 284 [ C(RESULT_MISS) ] = PM_L1_ICACHE_MISS, 285 }, 286 [ C(OP_WRITE) ] = { 287 [ C(RESULT_ACCESS) ] = PM_L1_DEMAND_WRITE, 288 [ C(RESULT_MISS) ] = -1, 289 }, 290 [ C(OP_PREFETCH) ] = { 291 [ C(RESULT_ACCESS) ] = PM_IC_PREF_WRITE, 292 [ C(RESULT_MISS) ] = 0, 293 }, 294 }, 295 [ C(LL) ] = { 296 [ C(OP_READ) ] = { 297 [ C(RESULT_ACCESS) ] = PM_DATA_FROM_L3, 298 [ C(RESULT_MISS) ] = PM_DATA_FROM_L3MISS, 299 }, 300 [ C(OP_WRITE) ] = { 301 [ C(RESULT_ACCESS) ] = PM_L2_ST, 302 [ C(RESULT_MISS) ] = PM_L2_ST_MISS, 303 }, 304 [ C(OP_PREFETCH) ] = { 305 [ C(RESULT_ACCESS) ] = PM_L3_PREF_ALL, 306 [ C(RESULT_MISS) ] = 0, 307 }, 308 }, 309 [ C(DTLB) ] = { 310 [ C(OP_READ) ] = { 311 [ C(RESULT_ACCESS) ] = 0, 312 [ C(RESULT_MISS) ] = PM_DTLB_MISS, 313 }, 314 [ C(OP_WRITE) ] = { 315 [ C(RESULT_ACCESS) ] = -1, 316 [ C(RESULT_MISS) ] = -1, 317 }, 318 [ C(OP_PREFETCH) ] = { 319 [ C(RESULT_ACCESS) ] = -1, 320 [ C(RESULT_MISS) ] = -1, 321 }, 322 }, 323 [ C(ITLB) ] = { 324 [ C(OP_READ) ] = { 325 [ C(RESULT_ACCESS) ] = 0, 326 [ C(RESULT_MISS) ] = PM_ITLB_MISS, 327 }, 328 [ C(OP_WRITE) ] = { 329 [ C(RESULT_ACCESS) ] = -1, 330 [ C(RESULT_MISS) ] = -1, 331 }, 332 [ C(OP_PREFETCH) ] = { 333 [ C(RESULT_ACCESS) ] = -1, 334 [ C(RESULT_MISS) ] = -1, 335 }, 336 }, 337 [ C(BPU) ] = { 338 [ C(OP_READ) ] = { 339 [ C(RESULT_ACCESS) ] = PM_BRU_FIN, 340 [ C(RESULT_MISS) ] = PM_BR_MPRED_CMPL, 341 }, 342 [ C(OP_WRITE) ] = { 343 [ C(RESULT_ACCESS) ] = -1, 344 [ C(RESULT_MISS) ] = -1, 345 }, 346 [ C(OP_PREFETCH) ] = { 347 [ C(RESULT_ACCESS) ] = -1, 348 [ C(RESULT_MISS) ] = -1, 349 }, 350 }, 351 [ C(NODE) ] = { 352 [ C(OP_READ) ] = { 353 [ C(RESULT_ACCESS) ] = -1, 354 [ C(RESULT_MISS) ] = -1, 355 }, 356 [ C(OP_WRITE) ] = { 357 [ C(RESULT_ACCESS) ] = -1, 358 [ C(RESULT_MISS) ] = -1, 359 }, 360 [ C(OP_PREFETCH) ] = { 361 [ C(RESULT_ACCESS) ] = -1, 362 [ C(RESULT_MISS) ] = -1, 363 }, 364 }, 365 }; 366 367 #undef C 368 369 static struct power_pmu power8_pmu = { 370 .name = "POWER8", 371 .n_counter = MAX_PMU_COUNTERS, 372 .max_alternatives = MAX_ALT + 1, 373 .add_fields = ISA207_ADD_FIELDS, 374 .test_adder = ISA207_TEST_ADDER, 375 .compute_mmcr = isa207_compute_mmcr, 376 .config_bhrb = power8_config_bhrb, 377 .bhrb_filter_map = power8_bhrb_filter_map, 378 .get_constraint = isa207_get_constraint, 379 .get_alternatives = power8_get_alternatives, 380 .get_mem_data_src = isa207_get_mem_data_src, 381 .get_mem_weight = isa207_get_mem_weight, 382 .disable_pmc = isa207_disable_pmc, 383 .flags = PPMU_HAS_SIER | PPMU_ARCH_207S, 384 .n_generic = ARRAY_SIZE(power8_generic_events), 385 .generic_events = power8_generic_events, 386 .cache_events = &power8_cache_events, 387 .attr_groups = power8_pmu_attr_groups, 388 .bhrb_nr = 32, 389 }; 390 391 int __init init_power8_pmu(void) 392 { 393 int rc; 394 unsigned int pvr = mfspr(SPRN_PVR); 395 396 if (PVR_VER(pvr) != PVR_POWER8E && PVR_VER(pvr) != PVR_POWER8NVL && 397 PVR_VER(pvr) != PVR_POWER8) 398 return -ENODEV; 399 400 rc = register_power_pmu(&power8_pmu); 401 if (rc) 402 return rc; 403 404 /* Tell userspace that EBB is supported */ 405 cur_cpu_spec->cpu_user_features2 |= PPC_FEATURE2_EBB; 406 407 if (cpu_has_feature(CPU_FTR_PMAO_BUG)) 408 pr_info("PMAO restore workaround active.\n"); 409 410 return 0; 411 } 412