1 /* 2 * Support cstate residency counters 3 * 4 * Copyright (C) 2015, Intel Corp. 5 * Author: Kan Liang (kan.liang@intel.com) 6 * 7 * This library is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU Library General Public 9 * License as published by the Free Software Foundation; either 10 * version 2 of the License, or (at your option) any later version. 11 * 12 * This library is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 * Library General Public License for more details. 16 * 17 */ 18 19 /* 20 * This file export cstate related free running (read-only) counters 21 * for perf. These counters may be use simultaneously by other tools, 22 * such as turbostat. However, it still make sense to implement them 23 * in perf. Because we can conveniently collect them together with 24 * other events, and allow to use them from tools without special MSR 25 * access code. 26 * 27 * The events only support system-wide mode counting. There is no 28 * sampling support because it is not supported by the hardware. 29 * 30 * According to counters' scope and category, two PMUs are registered 31 * with the perf_event core subsystem. 32 * - 'cstate_core': The counter is available for each physical core. 33 * The counters include CORE_C*_RESIDENCY. 34 * - 'cstate_pkg': The counter is available for each physical package. 35 * The counters include PKG_C*_RESIDENCY. 36 * 37 * All of these counters are specified in the Intel® 64 and IA-32 38 * Architectures Software Developer.s Manual Vol3b. 39 * 40 * Model specific counters: 41 * MSR_CORE_C1_RES: CORE C1 Residency Counter 42 * perf code: 0x00 43 * Available model: SLM,AMT,GLM,CNL,ICX,TNT,ADL,RPL 44 * MTL 45 * Scope: Core (each processor core has a MSR) 46 * MSR_CORE_C3_RESIDENCY: CORE C3 Residency Counter 47 * perf code: 0x01 48 * Available model: NHM,WSM,SNB,IVB,HSW,BDW,SKL,GLM, 49 * CNL,KBL,CML,TNT 50 * Scope: Core 51 * MSR_CORE_C6_RESIDENCY: CORE C6 Residency Counter 52 * perf code: 0x02 53 * Available model: SLM,AMT,NHM,WSM,SNB,IVB,HSW,BDW, 54 * SKL,KNL,GLM,CNL,KBL,CML,ICL,ICX, 55 * TGL,TNT,RKL,ADL,RPL,SPR,MTL 56 * Scope: Core 57 * MSR_CORE_C7_RESIDENCY: CORE C7 Residency Counter 58 * perf code: 0x03 59 * Available model: SNB,IVB,HSW,BDW,SKL,CNL,KBL,CML, 60 * ICL,TGL,RKL,ADL,RPL,MTL 61 * Scope: Core 62 * MSR_PKG_C2_RESIDENCY: Package C2 Residency Counter. 63 * perf code: 0x00 64 * Available model: SNB,IVB,HSW,BDW,SKL,KNL,GLM,CNL, 65 * KBL,CML,ICL,ICX,TGL,TNT,RKL,ADL, 66 * RPL,SPR,MTL 67 * Scope: Package (physical package) 68 * MSR_PKG_C3_RESIDENCY: Package C3 Residency Counter. 69 * perf code: 0x01 70 * Available model: NHM,WSM,SNB,IVB,HSW,BDW,SKL,KNL, 71 * GLM,CNL,KBL,CML,ICL,TGL,TNT,RKL, 72 * ADL,RPL,MTL 73 * Scope: Package (physical package) 74 * MSR_PKG_C6_RESIDENCY: Package C6 Residency Counter. 75 * perf code: 0x02 76 * Available model: SLM,AMT,NHM,WSM,SNB,IVB,HSW,BDW, 77 * SKL,KNL,GLM,CNL,KBL,CML,ICL,ICX, 78 * TGL,TNT,RKL,ADL,RPL,SPR,MTL 79 * Scope: Package (physical package) 80 * MSR_PKG_C7_RESIDENCY: Package C7 Residency Counter. 81 * perf code: 0x03 82 * Available model: NHM,WSM,SNB,IVB,HSW,BDW,SKL,CNL, 83 * KBL,CML,ICL,TGL,RKL,ADL,RPL,MTL 84 * Scope: Package (physical package) 85 * MSR_PKG_C8_RESIDENCY: Package C8 Residency Counter. 86 * perf code: 0x04 87 * Available model: HSW ULT,KBL,CNL,CML,ICL,TGL,RKL, 88 * ADL,RPL,MTL 89 * Scope: Package (physical package) 90 * MSR_PKG_C9_RESIDENCY: Package C9 Residency Counter. 91 * perf code: 0x05 92 * Available model: HSW ULT,KBL,CNL,CML,ICL,TGL,RKL, 93 * ADL,RPL,MTL 94 * Scope: Package (physical package) 95 * MSR_PKG_C10_RESIDENCY: Package C10 Residency Counter. 96 * perf code: 0x06 97 * Available model: HSW ULT,KBL,GLM,CNL,CML,ICL,TGL, 98 * TNT,RKL,ADL,RPL,MTL 99 * Scope: Package (physical package) 100 * 101 */ 102 103 #include <linux/module.h> 104 #include <linux/slab.h> 105 #include <linux/perf_event.h> 106 #include <linux/nospec.h> 107 #include <asm/cpu_device_id.h> 108 #include <asm/intel-family.h> 109 #include "../perf_event.h" 110 #include "../probe.h" 111 112 MODULE_LICENSE("GPL"); 113 114 #define DEFINE_CSTATE_FORMAT_ATTR(_var, _name, _format) \ 115 static ssize_t __cstate_##_var##_show(struct device *dev, \ 116 struct device_attribute *attr, \ 117 char *page) \ 118 { \ 119 BUILD_BUG_ON(sizeof(_format) >= PAGE_SIZE); \ 120 return sprintf(page, _format "\n"); \ 121 } \ 122 static struct device_attribute format_attr_##_var = \ 123 __ATTR(_name, 0444, __cstate_##_var##_show, NULL) 124 125 static ssize_t cstate_get_attr_cpumask(struct device *dev, 126 struct device_attribute *attr, 127 char *buf); 128 129 /* Model -> events mapping */ 130 struct cstate_model { 131 unsigned long core_events; 132 unsigned long pkg_events; 133 unsigned long quirks; 134 }; 135 136 /* Quirk flags */ 137 #define SLM_PKG_C6_USE_C7_MSR (1UL << 0) 138 #define KNL_CORE_C6_MSR (1UL << 1) 139 140 struct perf_cstate_msr { 141 u64 msr; 142 struct perf_pmu_events_attr *attr; 143 }; 144 145 146 /* cstate_core PMU */ 147 static struct pmu cstate_core_pmu; 148 static bool has_cstate_core; 149 150 enum perf_cstate_core_events { 151 PERF_CSTATE_CORE_C1_RES = 0, 152 PERF_CSTATE_CORE_C3_RES, 153 PERF_CSTATE_CORE_C6_RES, 154 PERF_CSTATE_CORE_C7_RES, 155 156 PERF_CSTATE_CORE_EVENT_MAX, 157 }; 158 159 PMU_EVENT_ATTR_STRING(c1-residency, attr_cstate_core_c1, "event=0x00"); 160 PMU_EVENT_ATTR_STRING(c3-residency, attr_cstate_core_c3, "event=0x01"); 161 PMU_EVENT_ATTR_STRING(c6-residency, attr_cstate_core_c6, "event=0x02"); 162 PMU_EVENT_ATTR_STRING(c7-residency, attr_cstate_core_c7, "event=0x03"); 163 164 static unsigned long core_msr_mask; 165 166 PMU_EVENT_GROUP(events, cstate_core_c1); 167 PMU_EVENT_GROUP(events, cstate_core_c3); 168 PMU_EVENT_GROUP(events, cstate_core_c6); 169 PMU_EVENT_GROUP(events, cstate_core_c7); 170 171 static bool test_msr(int idx, void *data) 172 { 173 return test_bit(idx, (unsigned long *) data); 174 } 175 176 static struct perf_msr core_msr[] = { 177 [PERF_CSTATE_CORE_C1_RES] = { MSR_CORE_C1_RES, &group_cstate_core_c1, test_msr }, 178 [PERF_CSTATE_CORE_C3_RES] = { MSR_CORE_C3_RESIDENCY, &group_cstate_core_c3, test_msr }, 179 [PERF_CSTATE_CORE_C6_RES] = { MSR_CORE_C6_RESIDENCY, &group_cstate_core_c6, test_msr }, 180 [PERF_CSTATE_CORE_C7_RES] = { MSR_CORE_C7_RESIDENCY, &group_cstate_core_c7, test_msr }, 181 }; 182 183 static struct attribute *attrs_empty[] = { 184 NULL, 185 }; 186 187 /* 188 * There are no default events, but we need to create 189 * "events" group (with empty attrs) before updating 190 * it with detected events. 191 */ 192 static struct attribute_group core_events_attr_group = { 193 .name = "events", 194 .attrs = attrs_empty, 195 }; 196 197 DEFINE_CSTATE_FORMAT_ATTR(core_event, event, "config:0-63"); 198 static struct attribute *core_format_attrs[] = { 199 &format_attr_core_event.attr, 200 NULL, 201 }; 202 203 static struct attribute_group core_format_attr_group = { 204 .name = "format", 205 .attrs = core_format_attrs, 206 }; 207 208 static cpumask_t cstate_core_cpu_mask; 209 static DEVICE_ATTR(cpumask, S_IRUGO, cstate_get_attr_cpumask, NULL); 210 211 static struct attribute *cstate_cpumask_attrs[] = { 212 &dev_attr_cpumask.attr, 213 NULL, 214 }; 215 216 static struct attribute_group cpumask_attr_group = { 217 .attrs = cstate_cpumask_attrs, 218 }; 219 220 static const struct attribute_group *core_attr_groups[] = { 221 &core_events_attr_group, 222 &core_format_attr_group, 223 &cpumask_attr_group, 224 NULL, 225 }; 226 227 /* cstate_pkg PMU */ 228 static struct pmu cstate_pkg_pmu; 229 static bool has_cstate_pkg; 230 231 enum perf_cstate_pkg_events { 232 PERF_CSTATE_PKG_C2_RES = 0, 233 PERF_CSTATE_PKG_C3_RES, 234 PERF_CSTATE_PKG_C6_RES, 235 PERF_CSTATE_PKG_C7_RES, 236 PERF_CSTATE_PKG_C8_RES, 237 PERF_CSTATE_PKG_C9_RES, 238 PERF_CSTATE_PKG_C10_RES, 239 240 PERF_CSTATE_PKG_EVENT_MAX, 241 }; 242 243 PMU_EVENT_ATTR_STRING(c2-residency, attr_cstate_pkg_c2, "event=0x00"); 244 PMU_EVENT_ATTR_STRING(c3-residency, attr_cstate_pkg_c3, "event=0x01"); 245 PMU_EVENT_ATTR_STRING(c6-residency, attr_cstate_pkg_c6, "event=0x02"); 246 PMU_EVENT_ATTR_STRING(c7-residency, attr_cstate_pkg_c7, "event=0x03"); 247 PMU_EVENT_ATTR_STRING(c8-residency, attr_cstate_pkg_c8, "event=0x04"); 248 PMU_EVENT_ATTR_STRING(c9-residency, attr_cstate_pkg_c9, "event=0x05"); 249 PMU_EVENT_ATTR_STRING(c10-residency, attr_cstate_pkg_c10, "event=0x06"); 250 251 static unsigned long pkg_msr_mask; 252 253 PMU_EVENT_GROUP(events, cstate_pkg_c2); 254 PMU_EVENT_GROUP(events, cstate_pkg_c3); 255 PMU_EVENT_GROUP(events, cstate_pkg_c6); 256 PMU_EVENT_GROUP(events, cstate_pkg_c7); 257 PMU_EVENT_GROUP(events, cstate_pkg_c8); 258 PMU_EVENT_GROUP(events, cstate_pkg_c9); 259 PMU_EVENT_GROUP(events, cstate_pkg_c10); 260 261 static struct perf_msr pkg_msr[] = { 262 [PERF_CSTATE_PKG_C2_RES] = { MSR_PKG_C2_RESIDENCY, &group_cstate_pkg_c2, test_msr }, 263 [PERF_CSTATE_PKG_C3_RES] = { MSR_PKG_C3_RESIDENCY, &group_cstate_pkg_c3, test_msr }, 264 [PERF_CSTATE_PKG_C6_RES] = { MSR_PKG_C6_RESIDENCY, &group_cstate_pkg_c6, test_msr }, 265 [PERF_CSTATE_PKG_C7_RES] = { MSR_PKG_C7_RESIDENCY, &group_cstate_pkg_c7, test_msr }, 266 [PERF_CSTATE_PKG_C8_RES] = { MSR_PKG_C8_RESIDENCY, &group_cstate_pkg_c8, test_msr }, 267 [PERF_CSTATE_PKG_C9_RES] = { MSR_PKG_C9_RESIDENCY, &group_cstate_pkg_c9, test_msr }, 268 [PERF_CSTATE_PKG_C10_RES] = { MSR_PKG_C10_RESIDENCY, &group_cstate_pkg_c10, test_msr }, 269 }; 270 271 static struct attribute_group pkg_events_attr_group = { 272 .name = "events", 273 .attrs = attrs_empty, 274 }; 275 276 DEFINE_CSTATE_FORMAT_ATTR(pkg_event, event, "config:0-63"); 277 static struct attribute *pkg_format_attrs[] = { 278 &format_attr_pkg_event.attr, 279 NULL, 280 }; 281 static struct attribute_group pkg_format_attr_group = { 282 .name = "format", 283 .attrs = pkg_format_attrs, 284 }; 285 286 static cpumask_t cstate_pkg_cpu_mask; 287 288 static const struct attribute_group *pkg_attr_groups[] = { 289 &pkg_events_attr_group, 290 &pkg_format_attr_group, 291 &cpumask_attr_group, 292 NULL, 293 }; 294 295 static ssize_t cstate_get_attr_cpumask(struct device *dev, 296 struct device_attribute *attr, 297 char *buf) 298 { 299 struct pmu *pmu = dev_get_drvdata(dev); 300 301 if (pmu == &cstate_core_pmu) 302 return cpumap_print_to_pagebuf(true, buf, &cstate_core_cpu_mask); 303 else if (pmu == &cstate_pkg_pmu) 304 return cpumap_print_to_pagebuf(true, buf, &cstate_pkg_cpu_mask); 305 else 306 return 0; 307 } 308 309 static int cstate_pmu_event_init(struct perf_event *event) 310 { 311 u64 cfg = event->attr.config; 312 int cpu; 313 314 if (event->attr.type != event->pmu->type) 315 return -ENOENT; 316 317 /* unsupported modes and filters */ 318 if (event->attr.sample_period) /* no sampling */ 319 return -EINVAL; 320 321 if (event->cpu < 0) 322 return -EINVAL; 323 324 if (event->pmu == &cstate_core_pmu) { 325 if (cfg >= PERF_CSTATE_CORE_EVENT_MAX) 326 return -EINVAL; 327 cfg = array_index_nospec((unsigned long)cfg, PERF_CSTATE_CORE_EVENT_MAX); 328 if (!(core_msr_mask & (1 << cfg))) 329 return -EINVAL; 330 event->hw.event_base = core_msr[cfg].msr; 331 cpu = cpumask_any_and(&cstate_core_cpu_mask, 332 topology_sibling_cpumask(event->cpu)); 333 } else if (event->pmu == &cstate_pkg_pmu) { 334 if (cfg >= PERF_CSTATE_PKG_EVENT_MAX) 335 return -EINVAL; 336 cfg = array_index_nospec((unsigned long)cfg, PERF_CSTATE_PKG_EVENT_MAX); 337 if (!(pkg_msr_mask & (1 << cfg))) 338 return -EINVAL; 339 event->hw.event_base = pkg_msr[cfg].msr; 340 cpu = cpumask_any_and(&cstate_pkg_cpu_mask, 341 topology_die_cpumask(event->cpu)); 342 } else { 343 return -ENOENT; 344 } 345 346 if (cpu >= nr_cpu_ids) 347 return -ENODEV; 348 349 event->cpu = cpu; 350 event->hw.config = cfg; 351 event->hw.idx = -1; 352 return 0; 353 } 354 355 static inline u64 cstate_pmu_read_counter(struct perf_event *event) 356 { 357 u64 val; 358 359 rdmsrl(event->hw.event_base, val); 360 return val; 361 } 362 363 static void cstate_pmu_event_update(struct perf_event *event) 364 { 365 struct hw_perf_event *hwc = &event->hw; 366 u64 prev_raw_count, new_raw_count; 367 368 again: 369 prev_raw_count = local64_read(&hwc->prev_count); 370 new_raw_count = cstate_pmu_read_counter(event); 371 372 if (local64_cmpxchg(&hwc->prev_count, prev_raw_count, 373 new_raw_count) != prev_raw_count) 374 goto again; 375 376 local64_add(new_raw_count - prev_raw_count, &event->count); 377 } 378 379 static void cstate_pmu_event_start(struct perf_event *event, int mode) 380 { 381 local64_set(&event->hw.prev_count, cstate_pmu_read_counter(event)); 382 } 383 384 static void cstate_pmu_event_stop(struct perf_event *event, int mode) 385 { 386 cstate_pmu_event_update(event); 387 } 388 389 static void cstate_pmu_event_del(struct perf_event *event, int mode) 390 { 391 cstate_pmu_event_stop(event, PERF_EF_UPDATE); 392 } 393 394 static int cstate_pmu_event_add(struct perf_event *event, int mode) 395 { 396 if (mode & PERF_EF_START) 397 cstate_pmu_event_start(event, mode); 398 399 return 0; 400 } 401 402 /* 403 * Check if exiting cpu is the designated reader. If so migrate the 404 * events when there is a valid target available 405 */ 406 static int cstate_cpu_exit(unsigned int cpu) 407 { 408 unsigned int target; 409 410 if (has_cstate_core && 411 cpumask_test_and_clear_cpu(cpu, &cstate_core_cpu_mask)) { 412 413 target = cpumask_any_but(topology_sibling_cpumask(cpu), cpu); 414 /* Migrate events if there is a valid target */ 415 if (target < nr_cpu_ids) { 416 cpumask_set_cpu(target, &cstate_core_cpu_mask); 417 perf_pmu_migrate_context(&cstate_core_pmu, cpu, target); 418 } 419 } 420 421 if (has_cstate_pkg && 422 cpumask_test_and_clear_cpu(cpu, &cstate_pkg_cpu_mask)) { 423 424 target = cpumask_any_but(topology_die_cpumask(cpu), cpu); 425 /* Migrate events if there is a valid target */ 426 if (target < nr_cpu_ids) { 427 cpumask_set_cpu(target, &cstate_pkg_cpu_mask); 428 perf_pmu_migrate_context(&cstate_pkg_pmu, cpu, target); 429 } 430 } 431 return 0; 432 } 433 434 static int cstate_cpu_init(unsigned int cpu) 435 { 436 unsigned int target; 437 438 /* 439 * If this is the first online thread of that core, set it in 440 * the core cpu mask as the designated reader. 441 */ 442 target = cpumask_any_and(&cstate_core_cpu_mask, 443 topology_sibling_cpumask(cpu)); 444 445 if (has_cstate_core && target >= nr_cpu_ids) 446 cpumask_set_cpu(cpu, &cstate_core_cpu_mask); 447 448 /* 449 * If this is the first online thread of that package, set it 450 * in the package cpu mask as the designated reader. 451 */ 452 target = cpumask_any_and(&cstate_pkg_cpu_mask, 453 topology_die_cpumask(cpu)); 454 if (has_cstate_pkg && target >= nr_cpu_ids) 455 cpumask_set_cpu(cpu, &cstate_pkg_cpu_mask); 456 457 return 0; 458 } 459 460 static const struct attribute_group *core_attr_update[] = { 461 &group_cstate_core_c1, 462 &group_cstate_core_c3, 463 &group_cstate_core_c6, 464 &group_cstate_core_c7, 465 NULL, 466 }; 467 468 static const struct attribute_group *pkg_attr_update[] = { 469 &group_cstate_pkg_c2, 470 &group_cstate_pkg_c3, 471 &group_cstate_pkg_c6, 472 &group_cstate_pkg_c7, 473 &group_cstate_pkg_c8, 474 &group_cstate_pkg_c9, 475 &group_cstate_pkg_c10, 476 NULL, 477 }; 478 479 static struct pmu cstate_core_pmu = { 480 .attr_groups = core_attr_groups, 481 .attr_update = core_attr_update, 482 .name = "cstate_core", 483 .task_ctx_nr = perf_invalid_context, 484 .event_init = cstate_pmu_event_init, 485 .add = cstate_pmu_event_add, 486 .del = cstate_pmu_event_del, 487 .start = cstate_pmu_event_start, 488 .stop = cstate_pmu_event_stop, 489 .read = cstate_pmu_event_update, 490 .capabilities = PERF_PMU_CAP_NO_INTERRUPT | PERF_PMU_CAP_NO_EXCLUDE, 491 .module = THIS_MODULE, 492 }; 493 494 static struct pmu cstate_pkg_pmu = { 495 .attr_groups = pkg_attr_groups, 496 .attr_update = pkg_attr_update, 497 .name = "cstate_pkg", 498 .task_ctx_nr = perf_invalid_context, 499 .event_init = cstate_pmu_event_init, 500 .add = cstate_pmu_event_add, 501 .del = cstate_pmu_event_del, 502 .start = cstate_pmu_event_start, 503 .stop = cstate_pmu_event_stop, 504 .read = cstate_pmu_event_update, 505 .capabilities = PERF_PMU_CAP_NO_INTERRUPT | PERF_PMU_CAP_NO_EXCLUDE, 506 .module = THIS_MODULE, 507 }; 508 509 static const struct cstate_model nhm_cstates __initconst = { 510 .core_events = BIT(PERF_CSTATE_CORE_C3_RES) | 511 BIT(PERF_CSTATE_CORE_C6_RES), 512 513 .pkg_events = BIT(PERF_CSTATE_PKG_C3_RES) | 514 BIT(PERF_CSTATE_PKG_C6_RES) | 515 BIT(PERF_CSTATE_PKG_C7_RES), 516 }; 517 518 static const struct cstate_model snb_cstates __initconst = { 519 .core_events = BIT(PERF_CSTATE_CORE_C3_RES) | 520 BIT(PERF_CSTATE_CORE_C6_RES) | 521 BIT(PERF_CSTATE_CORE_C7_RES), 522 523 .pkg_events = BIT(PERF_CSTATE_PKG_C2_RES) | 524 BIT(PERF_CSTATE_PKG_C3_RES) | 525 BIT(PERF_CSTATE_PKG_C6_RES) | 526 BIT(PERF_CSTATE_PKG_C7_RES), 527 }; 528 529 static const struct cstate_model hswult_cstates __initconst = { 530 .core_events = BIT(PERF_CSTATE_CORE_C3_RES) | 531 BIT(PERF_CSTATE_CORE_C6_RES) | 532 BIT(PERF_CSTATE_CORE_C7_RES), 533 534 .pkg_events = BIT(PERF_CSTATE_PKG_C2_RES) | 535 BIT(PERF_CSTATE_PKG_C3_RES) | 536 BIT(PERF_CSTATE_PKG_C6_RES) | 537 BIT(PERF_CSTATE_PKG_C7_RES) | 538 BIT(PERF_CSTATE_PKG_C8_RES) | 539 BIT(PERF_CSTATE_PKG_C9_RES) | 540 BIT(PERF_CSTATE_PKG_C10_RES), 541 }; 542 543 static const struct cstate_model cnl_cstates __initconst = { 544 .core_events = BIT(PERF_CSTATE_CORE_C1_RES) | 545 BIT(PERF_CSTATE_CORE_C3_RES) | 546 BIT(PERF_CSTATE_CORE_C6_RES) | 547 BIT(PERF_CSTATE_CORE_C7_RES), 548 549 .pkg_events = BIT(PERF_CSTATE_PKG_C2_RES) | 550 BIT(PERF_CSTATE_PKG_C3_RES) | 551 BIT(PERF_CSTATE_PKG_C6_RES) | 552 BIT(PERF_CSTATE_PKG_C7_RES) | 553 BIT(PERF_CSTATE_PKG_C8_RES) | 554 BIT(PERF_CSTATE_PKG_C9_RES) | 555 BIT(PERF_CSTATE_PKG_C10_RES), 556 }; 557 558 static const struct cstate_model icl_cstates __initconst = { 559 .core_events = BIT(PERF_CSTATE_CORE_C6_RES) | 560 BIT(PERF_CSTATE_CORE_C7_RES), 561 562 .pkg_events = BIT(PERF_CSTATE_PKG_C2_RES) | 563 BIT(PERF_CSTATE_PKG_C3_RES) | 564 BIT(PERF_CSTATE_PKG_C6_RES) | 565 BIT(PERF_CSTATE_PKG_C7_RES) | 566 BIT(PERF_CSTATE_PKG_C8_RES) | 567 BIT(PERF_CSTATE_PKG_C9_RES) | 568 BIT(PERF_CSTATE_PKG_C10_RES), 569 }; 570 571 static const struct cstate_model icx_cstates __initconst = { 572 .core_events = BIT(PERF_CSTATE_CORE_C1_RES) | 573 BIT(PERF_CSTATE_CORE_C6_RES), 574 575 .pkg_events = BIT(PERF_CSTATE_PKG_C2_RES) | 576 BIT(PERF_CSTATE_PKG_C6_RES), 577 }; 578 579 static const struct cstate_model adl_cstates __initconst = { 580 .core_events = BIT(PERF_CSTATE_CORE_C1_RES) | 581 BIT(PERF_CSTATE_CORE_C6_RES) | 582 BIT(PERF_CSTATE_CORE_C7_RES), 583 584 .pkg_events = BIT(PERF_CSTATE_PKG_C2_RES) | 585 BIT(PERF_CSTATE_PKG_C3_RES) | 586 BIT(PERF_CSTATE_PKG_C6_RES) | 587 BIT(PERF_CSTATE_PKG_C7_RES) | 588 BIT(PERF_CSTATE_PKG_C8_RES) | 589 BIT(PERF_CSTATE_PKG_C9_RES) | 590 BIT(PERF_CSTATE_PKG_C10_RES), 591 }; 592 593 static const struct cstate_model slm_cstates __initconst = { 594 .core_events = BIT(PERF_CSTATE_CORE_C1_RES) | 595 BIT(PERF_CSTATE_CORE_C6_RES), 596 597 .pkg_events = BIT(PERF_CSTATE_PKG_C6_RES), 598 .quirks = SLM_PKG_C6_USE_C7_MSR, 599 }; 600 601 602 static const struct cstate_model knl_cstates __initconst = { 603 .core_events = BIT(PERF_CSTATE_CORE_C6_RES), 604 605 .pkg_events = BIT(PERF_CSTATE_PKG_C2_RES) | 606 BIT(PERF_CSTATE_PKG_C3_RES) | 607 BIT(PERF_CSTATE_PKG_C6_RES), 608 .quirks = KNL_CORE_C6_MSR, 609 }; 610 611 612 static const struct cstate_model glm_cstates __initconst = { 613 .core_events = BIT(PERF_CSTATE_CORE_C1_RES) | 614 BIT(PERF_CSTATE_CORE_C3_RES) | 615 BIT(PERF_CSTATE_CORE_C6_RES), 616 617 .pkg_events = BIT(PERF_CSTATE_PKG_C2_RES) | 618 BIT(PERF_CSTATE_PKG_C3_RES) | 619 BIT(PERF_CSTATE_PKG_C6_RES) | 620 BIT(PERF_CSTATE_PKG_C10_RES), 621 }; 622 623 624 static const struct x86_cpu_id intel_cstates_match[] __initconst = { 625 X86_MATCH_INTEL_FAM6_MODEL(NEHALEM, &nhm_cstates), 626 X86_MATCH_INTEL_FAM6_MODEL(NEHALEM_EP, &nhm_cstates), 627 X86_MATCH_INTEL_FAM6_MODEL(NEHALEM_EX, &nhm_cstates), 628 629 X86_MATCH_INTEL_FAM6_MODEL(WESTMERE, &nhm_cstates), 630 X86_MATCH_INTEL_FAM6_MODEL(WESTMERE_EP, &nhm_cstates), 631 X86_MATCH_INTEL_FAM6_MODEL(WESTMERE_EX, &nhm_cstates), 632 633 X86_MATCH_INTEL_FAM6_MODEL(SANDYBRIDGE, &snb_cstates), 634 X86_MATCH_INTEL_FAM6_MODEL(SANDYBRIDGE_X, &snb_cstates), 635 636 X86_MATCH_INTEL_FAM6_MODEL(IVYBRIDGE, &snb_cstates), 637 X86_MATCH_INTEL_FAM6_MODEL(IVYBRIDGE_X, &snb_cstates), 638 639 X86_MATCH_INTEL_FAM6_MODEL(HASWELL, &snb_cstates), 640 X86_MATCH_INTEL_FAM6_MODEL(HASWELL_X, &snb_cstates), 641 X86_MATCH_INTEL_FAM6_MODEL(HASWELL_G, &snb_cstates), 642 643 X86_MATCH_INTEL_FAM6_MODEL(HASWELL_L, &hswult_cstates), 644 645 X86_MATCH_INTEL_FAM6_MODEL(ATOM_SILVERMONT, &slm_cstates), 646 X86_MATCH_INTEL_FAM6_MODEL(ATOM_SILVERMONT_D, &slm_cstates), 647 X86_MATCH_INTEL_FAM6_MODEL(ATOM_AIRMONT, &slm_cstates), 648 649 X86_MATCH_INTEL_FAM6_MODEL(BROADWELL, &snb_cstates), 650 X86_MATCH_INTEL_FAM6_MODEL(BROADWELL_D, &snb_cstates), 651 X86_MATCH_INTEL_FAM6_MODEL(BROADWELL_G, &snb_cstates), 652 X86_MATCH_INTEL_FAM6_MODEL(BROADWELL_X, &snb_cstates), 653 654 X86_MATCH_INTEL_FAM6_MODEL(SKYLAKE_L, &snb_cstates), 655 X86_MATCH_INTEL_FAM6_MODEL(SKYLAKE, &snb_cstates), 656 X86_MATCH_INTEL_FAM6_MODEL(SKYLAKE_X, &snb_cstates), 657 658 X86_MATCH_INTEL_FAM6_MODEL(KABYLAKE_L, &hswult_cstates), 659 X86_MATCH_INTEL_FAM6_MODEL(KABYLAKE, &hswult_cstates), 660 X86_MATCH_INTEL_FAM6_MODEL(COMETLAKE_L, &hswult_cstates), 661 X86_MATCH_INTEL_FAM6_MODEL(COMETLAKE, &hswult_cstates), 662 663 X86_MATCH_INTEL_FAM6_MODEL(CANNONLAKE_L, &cnl_cstates), 664 665 X86_MATCH_INTEL_FAM6_MODEL(XEON_PHI_KNL, &knl_cstates), 666 X86_MATCH_INTEL_FAM6_MODEL(XEON_PHI_KNM, &knl_cstates), 667 668 X86_MATCH_INTEL_FAM6_MODEL(ATOM_GOLDMONT, &glm_cstates), 669 X86_MATCH_INTEL_FAM6_MODEL(ATOM_GOLDMONT_D, &glm_cstates), 670 X86_MATCH_INTEL_FAM6_MODEL(ATOM_GOLDMONT_PLUS, &glm_cstates), 671 X86_MATCH_INTEL_FAM6_MODEL(ATOM_TREMONT_D, &glm_cstates), 672 X86_MATCH_INTEL_FAM6_MODEL(ATOM_TREMONT, &glm_cstates), 673 X86_MATCH_INTEL_FAM6_MODEL(ATOM_TREMONT_L, &glm_cstates), 674 675 X86_MATCH_INTEL_FAM6_MODEL(ICELAKE_L, &icl_cstates), 676 X86_MATCH_INTEL_FAM6_MODEL(ICELAKE, &icl_cstates), 677 X86_MATCH_INTEL_FAM6_MODEL(ICELAKE_X, &icx_cstates), 678 X86_MATCH_INTEL_FAM6_MODEL(ICELAKE_D, &icx_cstates), 679 X86_MATCH_INTEL_FAM6_MODEL(SAPPHIRERAPIDS_X, &icx_cstates), 680 X86_MATCH_INTEL_FAM6_MODEL(EMERALDRAPIDS_X, &icx_cstates), 681 682 X86_MATCH_INTEL_FAM6_MODEL(TIGERLAKE_L, &icl_cstates), 683 X86_MATCH_INTEL_FAM6_MODEL(TIGERLAKE, &icl_cstates), 684 X86_MATCH_INTEL_FAM6_MODEL(ROCKETLAKE, &icl_cstates), 685 X86_MATCH_INTEL_FAM6_MODEL(ALDERLAKE, &adl_cstates), 686 X86_MATCH_INTEL_FAM6_MODEL(ALDERLAKE_L, &adl_cstates), 687 X86_MATCH_INTEL_FAM6_MODEL(ALDERLAKE_N, &adl_cstates), 688 X86_MATCH_INTEL_FAM6_MODEL(RAPTORLAKE, &adl_cstates), 689 X86_MATCH_INTEL_FAM6_MODEL(RAPTORLAKE_P, &adl_cstates), 690 X86_MATCH_INTEL_FAM6_MODEL(RAPTORLAKE_S, &adl_cstates), 691 X86_MATCH_INTEL_FAM6_MODEL(METEORLAKE, &adl_cstates), 692 X86_MATCH_INTEL_FAM6_MODEL(METEORLAKE_L, &adl_cstates), 693 { }, 694 }; 695 MODULE_DEVICE_TABLE(x86cpu, intel_cstates_match); 696 697 static int __init cstate_probe(const struct cstate_model *cm) 698 { 699 /* SLM has different MSR for PKG C6 */ 700 if (cm->quirks & SLM_PKG_C6_USE_C7_MSR) 701 pkg_msr[PERF_CSTATE_PKG_C6_RES].msr = MSR_PKG_C7_RESIDENCY; 702 703 /* KNL has different MSR for CORE C6 */ 704 if (cm->quirks & KNL_CORE_C6_MSR) 705 pkg_msr[PERF_CSTATE_CORE_C6_RES].msr = MSR_KNL_CORE_C6_RESIDENCY; 706 707 708 core_msr_mask = perf_msr_probe(core_msr, PERF_CSTATE_CORE_EVENT_MAX, 709 true, (void *) &cm->core_events); 710 711 pkg_msr_mask = perf_msr_probe(pkg_msr, PERF_CSTATE_PKG_EVENT_MAX, 712 true, (void *) &cm->pkg_events); 713 714 has_cstate_core = !!core_msr_mask; 715 has_cstate_pkg = !!pkg_msr_mask; 716 717 return (has_cstate_core || has_cstate_pkg) ? 0 : -ENODEV; 718 } 719 720 static inline void cstate_cleanup(void) 721 { 722 cpuhp_remove_state_nocalls(CPUHP_AP_PERF_X86_CSTATE_ONLINE); 723 cpuhp_remove_state_nocalls(CPUHP_AP_PERF_X86_CSTATE_STARTING); 724 725 if (has_cstate_core) 726 perf_pmu_unregister(&cstate_core_pmu); 727 728 if (has_cstate_pkg) 729 perf_pmu_unregister(&cstate_pkg_pmu); 730 } 731 732 static int __init cstate_init(void) 733 { 734 int err; 735 736 cpuhp_setup_state(CPUHP_AP_PERF_X86_CSTATE_STARTING, 737 "perf/x86/cstate:starting", cstate_cpu_init, NULL); 738 cpuhp_setup_state(CPUHP_AP_PERF_X86_CSTATE_ONLINE, 739 "perf/x86/cstate:online", NULL, cstate_cpu_exit); 740 741 if (has_cstate_core) { 742 err = perf_pmu_register(&cstate_core_pmu, cstate_core_pmu.name, -1); 743 if (err) { 744 has_cstate_core = false; 745 pr_info("Failed to register cstate core pmu\n"); 746 cstate_cleanup(); 747 return err; 748 } 749 } 750 751 if (has_cstate_pkg) { 752 if (topology_max_die_per_package() > 1) { 753 err = perf_pmu_register(&cstate_pkg_pmu, 754 "cstate_die", -1); 755 } else { 756 err = perf_pmu_register(&cstate_pkg_pmu, 757 cstate_pkg_pmu.name, -1); 758 } 759 if (err) { 760 has_cstate_pkg = false; 761 pr_info("Failed to register cstate pkg pmu\n"); 762 cstate_cleanup(); 763 return err; 764 } 765 } 766 return 0; 767 } 768 769 static int __init cstate_pmu_init(void) 770 { 771 const struct x86_cpu_id *id; 772 int err; 773 774 if (boot_cpu_has(X86_FEATURE_HYPERVISOR)) 775 return -ENODEV; 776 777 id = x86_match_cpu(intel_cstates_match); 778 if (!id) 779 return -ENODEV; 780 781 err = cstate_probe((const struct cstate_model *) id->driver_data); 782 if (err) 783 return err; 784 785 return cstate_init(); 786 } 787 module_init(cstate_pmu_init); 788 789 static void __exit cstate_pmu_exit(void) 790 { 791 cstate_cleanup(); 792 } 793 module_exit(cstate_pmu_exit); 794