1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Support Intel/AMD RAPL energy consumption counters 4 * Copyright (C) 2013 Google, Inc., Stephane Eranian 5 * 6 * Intel RAPL interface is specified in the IA-32 Manual Vol3b 7 * section 14.7.1 (September 2013) 8 * 9 * AMD RAPL interface for Fam17h is described in the public PPR: 10 * https://bugzilla.kernel.org/show_bug.cgi?id=206537 11 * 12 * RAPL provides more controls than just reporting energy consumption 13 * however here we only expose the 3 energy consumption free running 14 * counters (pp0, pkg, dram). 15 * 16 * Each of those counters increments in a power unit defined by the 17 * RAPL_POWER_UNIT MSR. On SandyBridge, this unit is 1/(2^16) Joules 18 * but it can vary. 19 * 20 * Counter to rapl events mappings: 21 * 22 * pp0 counter: consumption of all physical cores (power plane 0) 23 * event: rapl_energy_cores 24 * perf code: 0x1 25 * 26 * pkg counter: consumption of the whole processor package 27 * event: rapl_energy_pkg 28 * perf code: 0x2 29 * 30 * dram counter: consumption of the dram domain (servers only) 31 * event: rapl_energy_dram 32 * perf code: 0x3 33 * 34 * gpu counter: consumption of the builtin-gpu domain (client only) 35 * event: rapl_energy_gpu 36 * perf code: 0x4 37 * 38 * psys counter: consumption of the builtin-psys domain (client only) 39 * event: rapl_energy_psys 40 * perf code: 0x5 41 * 42 * We manage those counters as free running (read-only). They may be 43 * use simultaneously by other tools, such as turbostat. 44 * 45 * The events only support system-wide mode counting. There is no 46 * sampling support because it does not make sense and is not 47 * supported by the RAPL hardware. 48 * 49 * Because we want to avoid floating-point operations in the kernel, 50 * the events are all reported in fixed point arithmetic (32.32). 51 * Tools must adjust the counts to convert them to Watts using 52 * the duration of the measurement. Tools may use a function such as 53 * ldexp(raw_count, -32); 54 */ 55 56 #define pr_fmt(fmt) "RAPL PMU: " fmt 57 58 #include <linux/module.h> 59 #include <linux/slab.h> 60 #include <linux/perf_event.h> 61 #include <linux/nospec.h> 62 #include <asm/cpu_device_id.h> 63 #include <asm/intel-family.h> 64 #include "perf_event.h" 65 #include "probe.h" 66 67 MODULE_LICENSE("GPL"); 68 69 /* 70 * RAPL energy status counters 71 */ 72 enum perf_rapl_events { 73 PERF_RAPL_PP0 = 0, /* all cores */ 74 PERF_RAPL_PKG, /* entire package */ 75 PERF_RAPL_RAM, /* DRAM */ 76 PERF_RAPL_PP1, /* gpu */ 77 PERF_RAPL_PSYS, /* psys */ 78 79 PERF_RAPL_MAX, 80 NR_RAPL_DOMAINS = PERF_RAPL_MAX, 81 }; 82 83 static const char *const rapl_domain_names[NR_RAPL_DOMAINS] __initconst = { 84 "pp0-core", 85 "package", 86 "dram", 87 "pp1-gpu", 88 "psys", 89 }; 90 91 /* 92 * event code: LSB 8 bits, passed in attr->config 93 * any other bit is reserved 94 */ 95 #define RAPL_EVENT_MASK 0xFFULL 96 #define RAPL_CNTR_WIDTH 32 97 98 #define RAPL_EVENT_ATTR_STR(_name, v, str) \ 99 static struct perf_pmu_events_attr event_attr_##v = { \ 100 .attr = __ATTR(_name, 0444, perf_event_sysfs_show, NULL), \ 101 .id = 0, \ 102 .event_str = str, \ 103 }; 104 105 struct rapl_pmu { 106 raw_spinlock_t lock; 107 int n_active; 108 int cpu; 109 struct list_head active_list; 110 struct pmu *pmu; 111 ktime_t timer_interval; 112 struct hrtimer hrtimer; 113 }; 114 115 struct rapl_pmus { 116 struct pmu pmu; 117 unsigned int maxdie; 118 struct rapl_pmu *pmus[]; 119 }; 120 121 enum rapl_unit_quirk { 122 RAPL_UNIT_QUIRK_NONE, 123 RAPL_UNIT_QUIRK_INTEL_HSW, 124 RAPL_UNIT_QUIRK_INTEL_SPR, 125 }; 126 127 struct rapl_model { 128 struct perf_msr *rapl_msrs; 129 unsigned long events; 130 unsigned int msr_power_unit; 131 enum rapl_unit_quirk unit_quirk; 132 }; 133 134 /* 1/2^hw_unit Joule */ 135 static int rapl_hw_unit[NR_RAPL_DOMAINS] __read_mostly; 136 static struct rapl_pmus *rapl_pmus; 137 static cpumask_t rapl_cpu_mask; 138 static unsigned int rapl_cntr_mask; 139 static u64 rapl_timer_ms; 140 static struct perf_msr *rapl_msrs; 141 142 static inline struct rapl_pmu *cpu_to_rapl_pmu(unsigned int cpu) 143 { 144 unsigned int dieid = topology_logical_die_id(cpu); 145 146 /* 147 * The unsigned check also catches the '-1' return value for non 148 * existent mappings in the topology map. 149 */ 150 return dieid < rapl_pmus->maxdie ? rapl_pmus->pmus[dieid] : NULL; 151 } 152 153 static inline u64 rapl_read_counter(struct perf_event *event) 154 { 155 u64 raw; 156 rdmsrl(event->hw.event_base, raw); 157 return raw; 158 } 159 160 static inline u64 rapl_scale(u64 v, int cfg) 161 { 162 if (cfg > NR_RAPL_DOMAINS) { 163 pr_warn("Invalid domain %d, failed to scale data\n", cfg); 164 return v; 165 } 166 /* 167 * scale delta to smallest unit (1/2^32) 168 * users must then scale back: count * 1/(1e9*2^32) to get Joules 169 * or use ldexp(count, -32). 170 * Watts = Joules/Time delta 171 */ 172 return v << (32 - rapl_hw_unit[cfg - 1]); 173 } 174 175 static u64 rapl_event_update(struct perf_event *event) 176 { 177 struct hw_perf_event *hwc = &event->hw; 178 u64 prev_raw_count, new_raw_count; 179 s64 delta, sdelta; 180 int shift = RAPL_CNTR_WIDTH; 181 182 again: 183 prev_raw_count = local64_read(&hwc->prev_count); 184 rdmsrl(event->hw.event_base, new_raw_count); 185 186 if (local64_cmpxchg(&hwc->prev_count, prev_raw_count, 187 new_raw_count) != prev_raw_count) { 188 cpu_relax(); 189 goto again; 190 } 191 192 /* 193 * Now we have the new raw value and have updated the prev 194 * timestamp already. We can now calculate the elapsed delta 195 * (event-)time and add that to the generic event. 196 * 197 * Careful, not all hw sign-extends above the physical width 198 * of the count. 199 */ 200 delta = (new_raw_count << shift) - (prev_raw_count << shift); 201 delta >>= shift; 202 203 sdelta = rapl_scale(delta, event->hw.config); 204 205 local64_add(sdelta, &event->count); 206 207 return new_raw_count; 208 } 209 210 static void rapl_start_hrtimer(struct rapl_pmu *pmu) 211 { 212 hrtimer_start(&pmu->hrtimer, pmu->timer_interval, 213 HRTIMER_MODE_REL_PINNED); 214 } 215 216 static enum hrtimer_restart rapl_hrtimer_handle(struct hrtimer *hrtimer) 217 { 218 struct rapl_pmu *pmu = container_of(hrtimer, struct rapl_pmu, hrtimer); 219 struct perf_event *event; 220 unsigned long flags; 221 222 if (!pmu->n_active) 223 return HRTIMER_NORESTART; 224 225 raw_spin_lock_irqsave(&pmu->lock, flags); 226 227 list_for_each_entry(event, &pmu->active_list, active_entry) 228 rapl_event_update(event); 229 230 raw_spin_unlock_irqrestore(&pmu->lock, flags); 231 232 hrtimer_forward_now(hrtimer, pmu->timer_interval); 233 234 return HRTIMER_RESTART; 235 } 236 237 static void rapl_hrtimer_init(struct rapl_pmu *pmu) 238 { 239 struct hrtimer *hr = &pmu->hrtimer; 240 241 hrtimer_init(hr, CLOCK_MONOTONIC, HRTIMER_MODE_REL); 242 hr->function = rapl_hrtimer_handle; 243 } 244 245 static void __rapl_pmu_event_start(struct rapl_pmu *pmu, 246 struct perf_event *event) 247 { 248 if (WARN_ON_ONCE(!(event->hw.state & PERF_HES_STOPPED))) 249 return; 250 251 event->hw.state = 0; 252 253 list_add_tail(&event->active_entry, &pmu->active_list); 254 255 local64_set(&event->hw.prev_count, rapl_read_counter(event)); 256 257 pmu->n_active++; 258 if (pmu->n_active == 1) 259 rapl_start_hrtimer(pmu); 260 } 261 262 static void rapl_pmu_event_start(struct perf_event *event, int mode) 263 { 264 struct rapl_pmu *pmu = event->pmu_private; 265 unsigned long flags; 266 267 raw_spin_lock_irqsave(&pmu->lock, flags); 268 __rapl_pmu_event_start(pmu, event); 269 raw_spin_unlock_irqrestore(&pmu->lock, flags); 270 } 271 272 static void rapl_pmu_event_stop(struct perf_event *event, int mode) 273 { 274 struct rapl_pmu *pmu = event->pmu_private; 275 struct hw_perf_event *hwc = &event->hw; 276 unsigned long flags; 277 278 raw_spin_lock_irqsave(&pmu->lock, flags); 279 280 /* mark event as deactivated and stopped */ 281 if (!(hwc->state & PERF_HES_STOPPED)) { 282 WARN_ON_ONCE(pmu->n_active <= 0); 283 pmu->n_active--; 284 if (pmu->n_active == 0) 285 hrtimer_cancel(&pmu->hrtimer); 286 287 list_del(&event->active_entry); 288 289 WARN_ON_ONCE(hwc->state & PERF_HES_STOPPED); 290 hwc->state |= PERF_HES_STOPPED; 291 } 292 293 /* check if update of sw counter is necessary */ 294 if ((mode & PERF_EF_UPDATE) && !(hwc->state & PERF_HES_UPTODATE)) { 295 /* 296 * Drain the remaining delta count out of a event 297 * that we are disabling: 298 */ 299 rapl_event_update(event); 300 hwc->state |= PERF_HES_UPTODATE; 301 } 302 303 raw_spin_unlock_irqrestore(&pmu->lock, flags); 304 } 305 306 static int rapl_pmu_event_add(struct perf_event *event, int mode) 307 { 308 struct rapl_pmu *pmu = event->pmu_private; 309 struct hw_perf_event *hwc = &event->hw; 310 unsigned long flags; 311 312 raw_spin_lock_irqsave(&pmu->lock, flags); 313 314 hwc->state = PERF_HES_UPTODATE | PERF_HES_STOPPED; 315 316 if (mode & PERF_EF_START) 317 __rapl_pmu_event_start(pmu, event); 318 319 raw_spin_unlock_irqrestore(&pmu->lock, flags); 320 321 return 0; 322 } 323 324 static void rapl_pmu_event_del(struct perf_event *event, int flags) 325 { 326 rapl_pmu_event_stop(event, PERF_EF_UPDATE); 327 } 328 329 static int rapl_pmu_event_init(struct perf_event *event) 330 { 331 u64 cfg = event->attr.config & RAPL_EVENT_MASK; 332 int bit, ret = 0; 333 struct rapl_pmu *pmu; 334 335 /* only look at RAPL events */ 336 if (event->attr.type != rapl_pmus->pmu.type) 337 return -ENOENT; 338 339 /* check only supported bits are set */ 340 if (event->attr.config & ~RAPL_EVENT_MASK) 341 return -EINVAL; 342 343 if (event->cpu < 0) 344 return -EINVAL; 345 346 event->event_caps |= PERF_EV_CAP_READ_ACTIVE_PKG; 347 348 if (!cfg || cfg >= NR_RAPL_DOMAINS + 1) 349 return -EINVAL; 350 351 cfg = array_index_nospec((long)cfg, NR_RAPL_DOMAINS + 1); 352 bit = cfg - 1; 353 354 /* check event supported */ 355 if (!(rapl_cntr_mask & (1 << bit))) 356 return -EINVAL; 357 358 /* unsupported modes and filters */ 359 if (event->attr.sample_period) /* no sampling */ 360 return -EINVAL; 361 362 /* must be done before validate_group */ 363 pmu = cpu_to_rapl_pmu(event->cpu); 364 if (!pmu) 365 return -EINVAL; 366 event->cpu = pmu->cpu; 367 event->pmu_private = pmu; 368 event->hw.event_base = rapl_msrs[bit].msr; 369 event->hw.config = cfg; 370 event->hw.idx = bit; 371 372 return ret; 373 } 374 375 static void rapl_pmu_event_read(struct perf_event *event) 376 { 377 rapl_event_update(event); 378 } 379 380 static ssize_t rapl_get_attr_cpumask(struct device *dev, 381 struct device_attribute *attr, char *buf) 382 { 383 return cpumap_print_to_pagebuf(true, buf, &rapl_cpu_mask); 384 } 385 386 static DEVICE_ATTR(cpumask, S_IRUGO, rapl_get_attr_cpumask, NULL); 387 388 static struct attribute *rapl_pmu_attrs[] = { 389 &dev_attr_cpumask.attr, 390 NULL, 391 }; 392 393 static struct attribute_group rapl_pmu_attr_group = { 394 .attrs = rapl_pmu_attrs, 395 }; 396 397 RAPL_EVENT_ATTR_STR(energy-cores, rapl_cores, "event=0x01"); 398 RAPL_EVENT_ATTR_STR(energy-pkg , rapl_pkg, "event=0x02"); 399 RAPL_EVENT_ATTR_STR(energy-ram , rapl_ram, "event=0x03"); 400 RAPL_EVENT_ATTR_STR(energy-gpu , rapl_gpu, "event=0x04"); 401 RAPL_EVENT_ATTR_STR(energy-psys, rapl_psys, "event=0x05"); 402 403 RAPL_EVENT_ATTR_STR(energy-cores.unit, rapl_cores_unit, "Joules"); 404 RAPL_EVENT_ATTR_STR(energy-pkg.unit , rapl_pkg_unit, "Joules"); 405 RAPL_EVENT_ATTR_STR(energy-ram.unit , rapl_ram_unit, "Joules"); 406 RAPL_EVENT_ATTR_STR(energy-gpu.unit , rapl_gpu_unit, "Joules"); 407 RAPL_EVENT_ATTR_STR(energy-psys.unit, rapl_psys_unit, "Joules"); 408 409 /* 410 * we compute in 0.23 nJ increments regardless of MSR 411 */ 412 RAPL_EVENT_ATTR_STR(energy-cores.scale, rapl_cores_scale, "2.3283064365386962890625e-10"); 413 RAPL_EVENT_ATTR_STR(energy-pkg.scale, rapl_pkg_scale, "2.3283064365386962890625e-10"); 414 RAPL_EVENT_ATTR_STR(energy-ram.scale, rapl_ram_scale, "2.3283064365386962890625e-10"); 415 RAPL_EVENT_ATTR_STR(energy-gpu.scale, rapl_gpu_scale, "2.3283064365386962890625e-10"); 416 RAPL_EVENT_ATTR_STR(energy-psys.scale, rapl_psys_scale, "2.3283064365386962890625e-10"); 417 418 /* 419 * There are no default events, but we need to create 420 * "events" group (with empty attrs) before updating 421 * it with detected events. 422 */ 423 static struct attribute *attrs_empty[] = { 424 NULL, 425 }; 426 427 static struct attribute_group rapl_pmu_events_group = { 428 .name = "events", 429 .attrs = attrs_empty, 430 }; 431 432 PMU_FORMAT_ATTR(event, "config:0-7"); 433 static struct attribute *rapl_formats_attr[] = { 434 &format_attr_event.attr, 435 NULL, 436 }; 437 438 static struct attribute_group rapl_pmu_format_group = { 439 .name = "format", 440 .attrs = rapl_formats_attr, 441 }; 442 443 static const struct attribute_group *rapl_attr_groups[] = { 444 &rapl_pmu_attr_group, 445 &rapl_pmu_format_group, 446 &rapl_pmu_events_group, 447 NULL, 448 }; 449 450 static struct attribute *rapl_events_cores[] = { 451 EVENT_PTR(rapl_cores), 452 EVENT_PTR(rapl_cores_unit), 453 EVENT_PTR(rapl_cores_scale), 454 NULL, 455 }; 456 457 static struct attribute_group rapl_events_cores_group = { 458 .name = "events", 459 .attrs = rapl_events_cores, 460 }; 461 462 static struct attribute *rapl_events_pkg[] = { 463 EVENT_PTR(rapl_pkg), 464 EVENT_PTR(rapl_pkg_unit), 465 EVENT_PTR(rapl_pkg_scale), 466 NULL, 467 }; 468 469 static struct attribute_group rapl_events_pkg_group = { 470 .name = "events", 471 .attrs = rapl_events_pkg, 472 }; 473 474 static struct attribute *rapl_events_ram[] = { 475 EVENT_PTR(rapl_ram), 476 EVENT_PTR(rapl_ram_unit), 477 EVENT_PTR(rapl_ram_scale), 478 NULL, 479 }; 480 481 static struct attribute_group rapl_events_ram_group = { 482 .name = "events", 483 .attrs = rapl_events_ram, 484 }; 485 486 static struct attribute *rapl_events_gpu[] = { 487 EVENT_PTR(rapl_gpu), 488 EVENT_PTR(rapl_gpu_unit), 489 EVENT_PTR(rapl_gpu_scale), 490 NULL, 491 }; 492 493 static struct attribute_group rapl_events_gpu_group = { 494 .name = "events", 495 .attrs = rapl_events_gpu, 496 }; 497 498 static struct attribute *rapl_events_psys[] = { 499 EVENT_PTR(rapl_psys), 500 EVENT_PTR(rapl_psys_unit), 501 EVENT_PTR(rapl_psys_scale), 502 NULL, 503 }; 504 505 static struct attribute_group rapl_events_psys_group = { 506 .name = "events", 507 .attrs = rapl_events_psys, 508 }; 509 510 static bool test_msr(int idx, void *data) 511 { 512 return test_bit(idx, (unsigned long *) data); 513 } 514 515 /* Only lower 32bits of the MSR represents the energy counter */ 516 #define RAPL_MSR_MASK 0xFFFFFFFF 517 518 static struct perf_msr intel_rapl_msrs[] = { 519 [PERF_RAPL_PP0] = { MSR_PP0_ENERGY_STATUS, &rapl_events_cores_group, test_msr, false, RAPL_MSR_MASK }, 520 [PERF_RAPL_PKG] = { MSR_PKG_ENERGY_STATUS, &rapl_events_pkg_group, test_msr, false, RAPL_MSR_MASK }, 521 [PERF_RAPL_RAM] = { MSR_DRAM_ENERGY_STATUS, &rapl_events_ram_group, test_msr, false, RAPL_MSR_MASK }, 522 [PERF_RAPL_PP1] = { MSR_PP1_ENERGY_STATUS, &rapl_events_gpu_group, test_msr, false, RAPL_MSR_MASK }, 523 [PERF_RAPL_PSYS] = { MSR_PLATFORM_ENERGY_STATUS, &rapl_events_psys_group, test_msr, false, RAPL_MSR_MASK }, 524 }; 525 526 static struct perf_msr intel_rapl_spr_msrs[] = { 527 [PERF_RAPL_PP0] = { MSR_PP0_ENERGY_STATUS, &rapl_events_cores_group, test_msr, false, RAPL_MSR_MASK }, 528 [PERF_RAPL_PKG] = { MSR_PKG_ENERGY_STATUS, &rapl_events_pkg_group, test_msr, false, RAPL_MSR_MASK }, 529 [PERF_RAPL_RAM] = { MSR_DRAM_ENERGY_STATUS, &rapl_events_ram_group, test_msr, false, RAPL_MSR_MASK }, 530 [PERF_RAPL_PP1] = { MSR_PP1_ENERGY_STATUS, &rapl_events_gpu_group, test_msr, false, RAPL_MSR_MASK }, 531 [PERF_RAPL_PSYS] = { MSR_PLATFORM_ENERGY_STATUS, &rapl_events_psys_group, test_msr, true, RAPL_MSR_MASK }, 532 }; 533 534 /* 535 * Force to PERF_RAPL_MAX size due to: 536 * - perf_msr_probe(PERF_RAPL_MAX) 537 * - want to use same event codes across both architectures 538 */ 539 static struct perf_msr amd_rapl_msrs[PERF_RAPL_MAX] = { 540 [PERF_RAPL_PKG] = { MSR_AMD_PKG_ENERGY_STATUS, &rapl_events_pkg_group, test_msr }, 541 }; 542 543 544 static int rapl_cpu_offline(unsigned int cpu) 545 { 546 struct rapl_pmu *pmu = cpu_to_rapl_pmu(cpu); 547 int target; 548 549 /* Check if exiting cpu is used for collecting rapl events */ 550 if (!cpumask_test_and_clear_cpu(cpu, &rapl_cpu_mask)) 551 return 0; 552 553 pmu->cpu = -1; 554 /* Find a new cpu to collect rapl events */ 555 target = cpumask_any_but(topology_die_cpumask(cpu), cpu); 556 557 /* Migrate rapl events to the new target */ 558 if (target < nr_cpu_ids) { 559 cpumask_set_cpu(target, &rapl_cpu_mask); 560 pmu->cpu = target; 561 perf_pmu_migrate_context(pmu->pmu, cpu, target); 562 } 563 return 0; 564 } 565 566 static int rapl_cpu_online(unsigned int cpu) 567 { 568 struct rapl_pmu *pmu = cpu_to_rapl_pmu(cpu); 569 int target; 570 571 if (!pmu) { 572 pmu = kzalloc_node(sizeof(*pmu), GFP_KERNEL, cpu_to_node(cpu)); 573 if (!pmu) 574 return -ENOMEM; 575 576 raw_spin_lock_init(&pmu->lock); 577 INIT_LIST_HEAD(&pmu->active_list); 578 pmu->pmu = &rapl_pmus->pmu; 579 pmu->timer_interval = ms_to_ktime(rapl_timer_ms); 580 rapl_hrtimer_init(pmu); 581 582 rapl_pmus->pmus[topology_logical_die_id(cpu)] = pmu; 583 } 584 585 /* 586 * Check if there is an online cpu in the package which collects rapl 587 * events already. 588 */ 589 target = cpumask_any_and(&rapl_cpu_mask, topology_die_cpumask(cpu)); 590 if (target < nr_cpu_ids) 591 return 0; 592 593 cpumask_set_cpu(cpu, &rapl_cpu_mask); 594 pmu->cpu = cpu; 595 return 0; 596 } 597 598 static int rapl_check_hw_unit(struct rapl_model *rm) 599 { 600 u64 msr_rapl_power_unit_bits; 601 int i; 602 603 /* protect rdmsrl() to handle virtualization */ 604 if (rdmsrl_safe(rm->msr_power_unit, &msr_rapl_power_unit_bits)) 605 return -1; 606 for (i = 0; i < NR_RAPL_DOMAINS; i++) 607 rapl_hw_unit[i] = (msr_rapl_power_unit_bits >> 8) & 0x1FULL; 608 609 switch (rm->unit_quirk) { 610 /* 611 * DRAM domain on HSW server and KNL has fixed energy unit which can be 612 * different than the unit from power unit MSR. See 613 * "Intel Xeon Processor E5-1600 and E5-2600 v3 Product Families, V2 614 * of 2. Datasheet, September 2014, Reference Number: 330784-001 " 615 */ 616 case RAPL_UNIT_QUIRK_INTEL_HSW: 617 rapl_hw_unit[PERF_RAPL_RAM] = 16; 618 break; 619 /* 620 * SPR shares the same DRAM domain energy unit as HSW, plus it 621 * also has a fixed energy unit for Psys domain. 622 */ 623 case RAPL_UNIT_QUIRK_INTEL_SPR: 624 rapl_hw_unit[PERF_RAPL_RAM] = 16; 625 rapl_hw_unit[PERF_RAPL_PSYS] = 0; 626 break; 627 default: 628 break; 629 } 630 631 632 /* 633 * Calculate the timer rate: 634 * Use reference of 200W for scaling the timeout to avoid counter 635 * overflows. 200W = 200 Joules/sec 636 * Divide interval by 2 to avoid lockstep (2 * 100) 637 * if hw unit is 32, then we use 2 ms 1/200/2 638 */ 639 rapl_timer_ms = 2; 640 if (rapl_hw_unit[0] < 32) { 641 rapl_timer_ms = (1000 / (2 * 100)); 642 rapl_timer_ms *= (1ULL << (32 - rapl_hw_unit[0] - 1)); 643 } 644 return 0; 645 } 646 647 static void __init rapl_advertise(void) 648 { 649 int i; 650 651 pr_info("API unit is 2^-32 Joules, %d fixed counters, %llu ms ovfl timer\n", 652 hweight32(rapl_cntr_mask), rapl_timer_ms); 653 654 for (i = 0; i < NR_RAPL_DOMAINS; i++) { 655 if (rapl_cntr_mask & (1 << i)) { 656 pr_info("hw unit of domain %s 2^-%d Joules\n", 657 rapl_domain_names[i], rapl_hw_unit[i]); 658 } 659 } 660 } 661 662 static void cleanup_rapl_pmus(void) 663 { 664 int i; 665 666 for (i = 0; i < rapl_pmus->maxdie; i++) 667 kfree(rapl_pmus->pmus[i]); 668 kfree(rapl_pmus); 669 } 670 671 static const struct attribute_group *rapl_attr_update[] = { 672 &rapl_events_cores_group, 673 &rapl_events_pkg_group, 674 &rapl_events_ram_group, 675 &rapl_events_gpu_group, 676 &rapl_events_psys_group, 677 NULL, 678 }; 679 680 static int __init init_rapl_pmus(void) 681 { 682 int maxdie = topology_max_packages() * topology_max_die_per_package(); 683 size_t size; 684 685 size = sizeof(*rapl_pmus) + maxdie * sizeof(struct rapl_pmu *); 686 rapl_pmus = kzalloc(size, GFP_KERNEL); 687 if (!rapl_pmus) 688 return -ENOMEM; 689 690 rapl_pmus->maxdie = maxdie; 691 rapl_pmus->pmu.attr_groups = rapl_attr_groups; 692 rapl_pmus->pmu.attr_update = rapl_attr_update; 693 rapl_pmus->pmu.task_ctx_nr = perf_invalid_context; 694 rapl_pmus->pmu.event_init = rapl_pmu_event_init; 695 rapl_pmus->pmu.add = rapl_pmu_event_add; 696 rapl_pmus->pmu.del = rapl_pmu_event_del; 697 rapl_pmus->pmu.start = rapl_pmu_event_start; 698 rapl_pmus->pmu.stop = rapl_pmu_event_stop; 699 rapl_pmus->pmu.read = rapl_pmu_event_read; 700 rapl_pmus->pmu.module = THIS_MODULE; 701 rapl_pmus->pmu.capabilities = PERF_PMU_CAP_NO_EXCLUDE; 702 return 0; 703 } 704 705 static struct rapl_model model_snb = { 706 .events = BIT(PERF_RAPL_PP0) | 707 BIT(PERF_RAPL_PKG) | 708 BIT(PERF_RAPL_PP1), 709 .msr_power_unit = MSR_RAPL_POWER_UNIT, 710 .rapl_msrs = intel_rapl_msrs, 711 }; 712 713 static struct rapl_model model_snbep = { 714 .events = BIT(PERF_RAPL_PP0) | 715 BIT(PERF_RAPL_PKG) | 716 BIT(PERF_RAPL_RAM), 717 .msr_power_unit = MSR_RAPL_POWER_UNIT, 718 .rapl_msrs = intel_rapl_msrs, 719 }; 720 721 static struct rapl_model model_hsw = { 722 .events = BIT(PERF_RAPL_PP0) | 723 BIT(PERF_RAPL_PKG) | 724 BIT(PERF_RAPL_RAM) | 725 BIT(PERF_RAPL_PP1), 726 .msr_power_unit = MSR_RAPL_POWER_UNIT, 727 .rapl_msrs = intel_rapl_msrs, 728 }; 729 730 static struct rapl_model model_hsx = { 731 .events = BIT(PERF_RAPL_PP0) | 732 BIT(PERF_RAPL_PKG) | 733 BIT(PERF_RAPL_RAM), 734 .unit_quirk = RAPL_UNIT_QUIRK_INTEL_HSW, 735 .msr_power_unit = MSR_RAPL_POWER_UNIT, 736 .rapl_msrs = intel_rapl_msrs, 737 }; 738 739 static struct rapl_model model_knl = { 740 .events = BIT(PERF_RAPL_PKG) | 741 BIT(PERF_RAPL_RAM), 742 .unit_quirk = RAPL_UNIT_QUIRK_INTEL_HSW, 743 .msr_power_unit = MSR_RAPL_POWER_UNIT, 744 .rapl_msrs = intel_rapl_msrs, 745 }; 746 747 static struct rapl_model model_skl = { 748 .events = BIT(PERF_RAPL_PP0) | 749 BIT(PERF_RAPL_PKG) | 750 BIT(PERF_RAPL_RAM) | 751 BIT(PERF_RAPL_PP1) | 752 BIT(PERF_RAPL_PSYS), 753 .msr_power_unit = MSR_RAPL_POWER_UNIT, 754 .rapl_msrs = intel_rapl_msrs, 755 }; 756 757 static struct rapl_model model_spr = { 758 .events = BIT(PERF_RAPL_PP0) | 759 BIT(PERF_RAPL_PKG) | 760 BIT(PERF_RAPL_RAM) | 761 BIT(PERF_RAPL_PSYS), 762 .unit_quirk = RAPL_UNIT_QUIRK_INTEL_SPR, 763 .msr_power_unit = MSR_RAPL_POWER_UNIT, 764 .rapl_msrs = intel_rapl_spr_msrs, 765 }; 766 767 static struct rapl_model model_amd_hygon = { 768 .events = BIT(PERF_RAPL_PKG), 769 .msr_power_unit = MSR_AMD_RAPL_POWER_UNIT, 770 .rapl_msrs = amd_rapl_msrs, 771 }; 772 773 static const struct x86_cpu_id rapl_model_match[] __initconst = { 774 X86_MATCH_FEATURE(X86_FEATURE_RAPL, &model_amd_hygon), 775 X86_MATCH_INTEL_FAM6_MODEL(SANDYBRIDGE, &model_snb), 776 X86_MATCH_INTEL_FAM6_MODEL(SANDYBRIDGE_X, &model_snbep), 777 X86_MATCH_INTEL_FAM6_MODEL(IVYBRIDGE, &model_snb), 778 X86_MATCH_INTEL_FAM6_MODEL(IVYBRIDGE_X, &model_snbep), 779 X86_MATCH_INTEL_FAM6_MODEL(HASWELL, &model_hsw), 780 X86_MATCH_INTEL_FAM6_MODEL(HASWELL_X, &model_hsx), 781 X86_MATCH_INTEL_FAM6_MODEL(HASWELL_L, &model_hsw), 782 X86_MATCH_INTEL_FAM6_MODEL(HASWELL_G, &model_hsw), 783 X86_MATCH_INTEL_FAM6_MODEL(BROADWELL, &model_hsw), 784 X86_MATCH_INTEL_FAM6_MODEL(BROADWELL_G, &model_hsw), 785 X86_MATCH_INTEL_FAM6_MODEL(BROADWELL_X, &model_hsx), 786 X86_MATCH_INTEL_FAM6_MODEL(BROADWELL_D, &model_hsx), 787 X86_MATCH_INTEL_FAM6_MODEL(XEON_PHI_KNL, &model_knl), 788 X86_MATCH_INTEL_FAM6_MODEL(XEON_PHI_KNM, &model_knl), 789 X86_MATCH_INTEL_FAM6_MODEL(SKYLAKE_L, &model_skl), 790 X86_MATCH_INTEL_FAM6_MODEL(SKYLAKE, &model_skl), 791 X86_MATCH_INTEL_FAM6_MODEL(SKYLAKE_X, &model_hsx), 792 X86_MATCH_INTEL_FAM6_MODEL(KABYLAKE_L, &model_skl), 793 X86_MATCH_INTEL_FAM6_MODEL(KABYLAKE, &model_skl), 794 X86_MATCH_INTEL_FAM6_MODEL(CANNONLAKE_L, &model_skl), 795 X86_MATCH_INTEL_FAM6_MODEL(ATOM_GOLDMONT, &model_hsw), 796 X86_MATCH_INTEL_FAM6_MODEL(ATOM_GOLDMONT_D, &model_hsw), 797 X86_MATCH_INTEL_FAM6_MODEL(ATOM_GOLDMONT_PLUS, &model_hsw), 798 X86_MATCH_INTEL_FAM6_MODEL(ICELAKE_L, &model_skl), 799 X86_MATCH_INTEL_FAM6_MODEL(ICELAKE, &model_skl), 800 X86_MATCH_INTEL_FAM6_MODEL(ICELAKE_D, &model_hsx), 801 X86_MATCH_INTEL_FAM6_MODEL(ICELAKE_X, &model_hsx), 802 X86_MATCH_INTEL_FAM6_MODEL(COMETLAKE_L, &model_skl), 803 X86_MATCH_INTEL_FAM6_MODEL(COMETLAKE, &model_skl), 804 X86_MATCH_INTEL_FAM6_MODEL(ALDERLAKE, &model_skl), 805 X86_MATCH_INTEL_FAM6_MODEL(ALDERLAKE_L, &model_skl), 806 X86_MATCH_INTEL_FAM6_MODEL(SAPPHIRERAPIDS_X, &model_spr), 807 {}, 808 }; 809 MODULE_DEVICE_TABLE(x86cpu, rapl_model_match); 810 811 static int __init rapl_pmu_init(void) 812 { 813 const struct x86_cpu_id *id; 814 struct rapl_model *rm; 815 int ret; 816 817 id = x86_match_cpu(rapl_model_match); 818 if (!id) 819 return -ENODEV; 820 821 rm = (struct rapl_model *) id->driver_data; 822 823 rapl_msrs = rm->rapl_msrs; 824 825 rapl_cntr_mask = perf_msr_probe(rapl_msrs, PERF_RAPL_MAX, 826 false, (void *) &rm->events); 827 828 ret = rapl_check_hw_unit(rm); 829 if (ret) 830 return ret; 831 832 ret = init_rapl_pmus(); 833 if (ret) 834 return ret; 835 836 /* 837 * Install callbacks. Core will call them for each online cpu. 838 */ 839 ret = cpuhp_setup_state(CPUHP_AP_PERF_X86_RAPL_ONLINE, 840 "perf/x86/rapl:online", 841 rapl_cpu_online, rapl_cpu_offline); 842 if (ret) 843 goto out; 844 845 ret = perf_pmu_register(&rapl_pmus->pmu, "power", -1); 846 if (ret) 847 goto out1; 848 849 rapl_advertise(); 850 return 0; 851 852 out1: 853 cpuhp_remove_state(CPUHP_AP_PERF_X86_RAPL_ONLINE); 854 out: 855 pr_warn("Initialization failed (%d), disabled\n", ret); 856 cleanup_rapl_pmus(); 857 return ret; 858 } 859 module_init(rapl_pmu_init); 860 861 static void __exit intel_rapl_exit(void) 862 { 863 cpuhp_remove_state_nocalls(CPUHP_AP_PERF_X86_RAPL_ONLINE); 864 perf_pmu_unregister(&rapl_pmus->pmu); 865 cleanup_rapl_pmus(); 866 } 867 module_exit(intel_rapl_exit); 868