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