arch/x86/events/amd/uncore.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (C) 2013 Advanced Micro Devices, Inc.
   4  *
   5  * Author: Jacob Shin <jacob.shin@amd.com>
   6  */
   7
   8 #include <linux/perf_event.h>
   9 #include <linux/percpu.h>
  10 #include <linux/types.h>
  11 #include <linux/slab.h>
  12 #include <linux/init.h>
  13 #include <linux/cpu.h>
  14 #include <linux/cpumask.h>
  15 #include <linux/cpufeature.h>
  16 #include <linux/smp.h>
  17
  18 #include <asm/perf_event.h>
  19 #include <asm/msr.h>
  20
  21 #define NUM_COUNTERS_NB         4
  22 #define NUM_COUNTERS_L2         4
  23 #define NUM_COUNTERS_L3         6
  24 #define MAX_COUNTERS            6
  25
  26 #define RDPMC_BASE_NB           6
  27 #define RDPMC_BASE_LLC          10
  28
  29 #define COUNTER_SHIFT           16
  30
  31 #undef pr_fmt
  32 #define pr_fmt(fmt)     "amd_uncore: " fmt
  33
  34 static int num_counters_llc;
  35 static int num_counters_nb;
  36 static bool l3_mask;
  37
  38 static HLIST_HEAD(uncore_unused_list);
  39
  40 struct amd_uncore {
  41         int id;
  42         int refcnt;
  43         int cpu;
  44         int num_counters;
  45         int rdpmc_base;
  46         u32 msr_base;
  47         cpumask_t *active_mask;
  48         struct pmu *pmu;
  49         struct perf_event *events[MAX_COUNTERS];
  50         struct hlist_node node;
  51 };
  52
  53 static struct amd_uncore * __percpu *amd_uncore_nb;
  54 static struct amd_uncore * __percpu *amd_uncore_llc;
  55
  56 static struct pmu amd_nb_pmu;
  57 static struct pmu amd_llc_pmu;
  58
  59 static cpumask_t amd_nb_active_mask;
  60 static cpumask_t amd_llc_active_mask;
  61
  62 static bool is_nb_event(struct perf_event *event)
  63 {
  64         return event->pmu->type == amd_nb_pmu.type;
  65 }
  66
  67 static bool is_llc_event(struct perf_event *event)
  68 {
  69         return event->pmu->type == amd_llc_pmu.type;
  70 }
  71
  72 static struct amd_uncore *event_to_amd_uncore(struct perf_event *event)
  73 {
  74         if (is_nb_event(event) && amd_uncore_nb)
  75                 return *per_cpu_ptr(amd_uncore_nb, event->cpu);
  76         else if (is_llc_event(event) && amd_uncore_llc)
  77                 return *per_cpu_ptr(amd_uncore_llc, event->cpu);
  78
  79         return NULL;
  80 }
  81
  82 static void amd_uncore_read(struct perf_event *event)
  83 {
  84         struct hw_perf_event *hwc = &event->hw;
  85         u64 prev, new;
  86         s64 delta;
  87
  88         /*
  89          * since we do not enable counter overflow interrupts,
  90          * we do not have to worry about prev_count changing on us
  91          */
  92
  93         prev = local64_read(&hwc->prev_count);
  94         rdpmcl(hwc->event_base_rdpmc, new);
  95         local64_set(&hwc->prev_count, new);
  96         delta = (new << COUNTER_SHIFT) - (prev << COUNTER_SHIFT);
  97         delta >>= COUNTER_SHIFT;
  98         local64_add(delta, &event->count);
  99 }
 100
 101 static void amd_uncore_start(struct perf_event *event, int flags)
 102 {
 103         struct hw_perf_event *hwc = &event->hw;
 104
 105         if (flags & PERF_EF_RELOAD)
 106                 wrmsrl(hwc->event_base, (u64)local64_read(&hwc->prev_count));
 107
 108         hwc->state = 0;
 109         wrmsrl(hwc->config_base, (hwc->config | ARCH_PERFMON_EVENTSEL_ENABLE));
 110         perf_event_update_userpage(event);
 111 }
 112
 113 static void amd_uncore_stop(struct perf_event *event, int flags)
 114 {
 115         struct hw_perf_event *hwc = &event->hw;
 116
 117         wrmsrl(hwc->config_base, hwc->config);
 118         hwc->state |= PERF_HES_STOPPED;
 119
 120         if ((flags & PERF_EF_UPDATE) && !(hwc->state & PERF_HES_UPTODATE)) {
 121                 amd_uncore_read(event);
 122                 hwc->state |= PERF_HES_UPTODATE;
 123         }
 124 }
 125
 126 static int amd_uncore_add(struct perf_event *event, int flags)
 127 {
 128         int i;
 129         struct amd_uncore *uncore = event_to_amd_uncore(event);
 130         struct hw_perf_event *hwc = &event->hw;
 131
 132         /* are we already assigned? */
 133         if (hwc->idx != -1 && uncore->events[hwc->idx] == event)
 134                 goto out;
 135
 136         for (i = 0; i < uncore->num_counters; i++) {
 137                 if (uncore->events[i] == event) {
 138                         hwc->idx = i;
 139                         goto out;
 140                 }
 141         }
 142
 143         /* if not, take the first available counter */
 144         hwc->idx = -1;
 145         for (i = 0; i < uncore->num_counters; i++) {
 146                 if (cmpxchg(&uncore->events[i], NULL, event) == NULL) {
 147                         hwc->idx = i;
 148                         break;
 149                 }
 150         }
 151
 152 out:
 153         if (hwc->idx == -1)
 154                 return -EBUSY;
 155
 156         hwc->config_base = uncore->msr_base + (2 * hwc->idx);
 157         hwc->event_base = uncore->msr_base + 1 + (2 * hwc->idx);
 158         hwc->event_base_rdpmc = uncore->rdpmc_base + hwc->idx;
 159         hwc->state = PERF_HES_UPTODATE | PERF_HES_STOPPED;
 160
 161         if (flags & PERF_EF_START)
 162                 amd_uncore_start(event, PERF_EF_RELOAD);
 163
 164         return 0;
 165 }
 166
 167 static void amd_uncore_del(struct perf_event *event, int flags)
 168 {
 169         int i;
 170         struct amd_uncore *uncore = event_to_amd_uncore(event);
 171         struct hw_perf_event *hwc = &event->hw;
 172
 173         amd_uncore_stop(event, PERF_EF_UPDATE);
 174
 175         for (i = 0; i < uncore->num_counters; i++) {
 176                 if (cmpxchg(&uncore->events[i], event, NULL) == event)
 177                         break;
 178         }
 179
 180         hwc->idx = -1;
 181 }
 182
 183 /*
 184  * Return a full thread and slice mask unless user
 185  * has provided them
 186  */
 187 static u64 l3_thread_slice_mask(u64 config)
 188 {
 189         if (boot_cpu_data.x86 <= 0x18)
 190                 return ((config & AMD64_L3_SLICE_MASK) ? : AMD64_L3_SLICE_MASK) |
 191                        ((config & AMD64_L3_THREAD_MASK) ? : AMD64_L3_THREAD_MASK);
 192
 193         /*
 194          * If the user doesn't specify a threadmask, they're not trying to
 195          * count core 0, so we enable all cores & threads.
 196          * We'll also assume that they want to count slice 0 if they specify
 197          * a threadmask and leave sliceid and enallslices unpopulated.
 198          */
 199         if (!(config & AMD64_L3_F19H_THREAD_MASK))
 200                 return AMD64_L3_F19H_THREAD_MASK | AMD64_L3_EN_ALL_SLICES |
 201                        AMD64_L3_EN_ALL_CORES;
 202
 203         return config & (AMD64_L3_F19H_THREAD_MASK | AMD64_L3_SLICEID_MASK |
 204                          AMD64_L3_EN_ALL_CORES | AMD64_L3_EN_ALL_SLICES |
 205                          AMD64_L3_COREID_MASK);
 206 }
 207
 208 static int amd_uncore_event_init(struct perf_event *event)
 209 {
 210         struct amd_uncore *uncore;
 211         struct hw_perf_event *hwc = &event->hw;
 212
 213         if (event->attr.type != event->pmu->type)
 214                 return -ENOENT;
 215
 216         /*
 217          * NB and Last level cache counters (MSRs) are shared across all cores
 218          * that share the same NB / Last level cache.  On family 16h and below,
 219          * Interrupts can be directed to a single target core, however, event
 220          * counts generated by processes running on other cores cannot be masked
 221          * out. So we do not support sampling and per-thread events via
 222          * CAP_NO_INTERRUPT, and we do not enable counter overflow interrupts:
 223          */
 224         hwc->config = event->attr.config & AMD64_RAW_EVENT_MASK_NB;
 225         hwc->idx = -1;
 226
 227         if (event->cpu < 0)
 228                 return -EINVAL;
 229
 230         /*
 231          * SliceMask and ThreadMask need to be set for certain L3 events.
 232          * For other events, the two fields do not affect the count.
 233          */
 234         if (l3_mask && is_llc_event(event))
 235                 hwc->config |= l3_thread_slice_mask(event->attr.config);
 236
 237         uncore = event_to_amd_uncore(event);
 238         if (!uncore)
 239                 return -ENODEV;
 240
 241         /*
 242          * since request can come in to any of the shared cores, we will remap
 243          * to a single common cpu.
 244          */
 245         event->cpu = uncore->cpu;
 246
 247         return 0;
 248 }
 249
 250 static ssize_t amd_uncore_attr_show_cpumask(struct device *dev,
 251                                             struct device_attribute *attr,
 252                                             char *buf)
 253 {
 254         cpumask_t *active_mask;
 255         struct pmu *pmu = dev_get_drvdata(dev);
 256
 257         if (pmu->type == amd_nb_pmu.type)
 258                 active_mask = &amd_nb_active_mask;
 259         else if (pmu->type == amd_llc_pmu.type)
 260                 active_mask = &amd_llc_active_mask;
 261         else
 262                 return 0;
 263
 264         return cpumap_print_to_pagebuf(true, buf, active_mask);
 265 }
 266 static DEVICE_ATTR(cpumask, S_IRUGO, amd_uncore_attr_show_cpumask, NULL);
 267
 268 static struct attribute *amd_uncore_attrs[] = {
 269         &dev_attr_cpumask.attr,
 270         NULL,
 271 };
 272
 273 static struct attribute_group amd_uncore_attr_group = {
 274         .attrs = amd_uncore_attrs,
 275 };
 276
 277 #define DEFINE_UNCORE_FORMAT_ATTR(_var, _name, _format)                 \
 278 static ssize_t __uncore_##_var##_show(struct device *dev,               \
 279                                 struct device_attribute *attr,          \
 280                                 char *page)                             \
 281 {                                                                       \
 282         BUILD_BUG_ON(sizeof(_format) >= PAGE_SIZE);                     \
 283         return sprintf(page, _format "\n");                             \
 284 }                                                                       \
 285 static struct device_attribute format_attr_##_var =                     \
 286         __ATTR(_name, 0444, __uncore_##_var##_show, NULL)
 287
 288 DEFINE_UNCORE_FORMAT_ATTR(event12,      event,          "config:0-7,32-35");
 289 DEFINE_UNCORE_FORMAT_ATTR(event14,      event,          "config:0-7,32-35,59-60"); /* F17h+ DF */
 290 DEFINE_UNCORE_FORMAT_ATTR(event8,       event,          "config:0-7");             /* F17h+ L3 */
 291 DEFINE_UNCORE_FORMAT_ATTR(umask,        umask,          "config:8-15");
 292 DEFINE_UNCORE_FORMAT_ATTR(coreid,       coreid,         "config:42-44");           /* F19h L3 */
 293 DEFINE_UNCORE_FORMAT_ATTR(slicemask,    slicemask,      "config:48-51");           /* F17h L3 */
 294 DEFINE_UNCORE_FORMAT_ATTR(threadmask8,  threadmask,     "config:56-63");           /* F17h L3 */
 295 DEFINE_UNCORE_FORMAT_ATTR(threadmask2,  threadmask,     "config:56-57");           /* F19h L3 */
 296 DEFINE_UNCORE_FORMAT_ATTR(enallslices,  enallslices,    "config:46");              /* F19h L3 */
 297 DEFINE_UNCORE_FORMAT_ATTR(enallcores,   enallcores,     "config:47");              /* F19h L3 */
 298 DEFINE_UNCORE_FORMAT_ATTR(sliceid,      sliceid,        "config:48-50");           /* F19h L3 */
 299
 300 static struct attribute *amd_uncore_df_format_attr[] = {
 301         &format_attr_event12.attr, /* event14 if F17h+ */
 302         &format_attr_umask.attr,
 303         NULL,
 304 };
 305
 306 static struct attribute *amd_uncore_l3_format_attr[] = {
 307         &format_attr_event12.attr, /* event8 if F17h+ */
 308         &format_attr_umask.attr,
 309         NULL, /* slicemask if F17h,     coreid if F19h */
 310         NULL, /* threadmask8 if F17h,   enallslices if F19h */
 311         NULL, /*                        enallcores if F19h */
 312         NULL, /*                        sliceid if F19h */
 313         NULL, /*                        threadmask2 if F19h */
 314         NULL,
 315 };
 316
 317 static struct attribute_group amd_uncore_df_format_group = {
 318         .name = "format",
 319         .attrs = amd_uncore_df_format_attr,
 320 };
 321
 322 static struct attribute_group amd_uncore_l3_format_group = {
 323         .name = "format",
 324         .attrs = amd_uncore_l3_format_attr,
 325 };
 326
 327 static const struct attribute_group *amd_uncore_df_attr_groups[] = {
 328         &amd_uncore_attr_group,
 329         &amd_uncore_df_format_group,
 330         NULL,
 331 };
 332
 333 static const struct attribute_group *amd_uncore_l3_attr_groups[] = {
 334         &amd_uncore_attr_group,
 335         &amd_uncore_l3_format_group,
 336         NULL,
 337 };
 338
 339 static struct pmu amd_nb_pmu = {
 340         .task_ctx_nr    = perf_invalid_context,
 341         .attr_groups    = amd_uncore_df_attr_groups,
 342         .name           = "amd_nb",
 343         .event_init     = amd_uncore_event_init,
 344         .add            = amd_uncore_add,
 345         .del            = amd_uncore_del,
 346         .start          = amd_uncore_start,
 347         .stop           = amd_uncore_stop,
 348         .read           = amd_uncore_read,
 349         .capabilities   = PERF_PMU_CAP_NO_EXCLUDE | PERF_PMU_CAP_NO_INTERRUPT,
 350         .module         = THIS_MODULE,
 351 };
 352
 353 static struct pmu amd_llc_pmu = {
 354         .task_ctx_nr    = perf_invalid_context,
 355         .attr_groups    = amd_uncore_l3_attr_groups,
 356         .name           = "amd_l2",
 357         .event_init     = amd_uncore_event_init,
 358         .add            = amd_uncore_add,
 359         .del            = amd_uncore_del,
 360         .start          = amd_uncore_start,
 361         .stop           = amd_uncore_stop,
 362         .read           = amd_uncore_read,
 363         .capabilities   = PERF_PMU_CAP_NO_EXCLUDE | PERF_PMU_CAP_NO_INTERRUPT,
 364         .module         = THIS_MODULE,
 365 };
 366
 367 static struct amd_uncore *amd_uncore_alloc(unsigned int cpu)
 368 {
 369         return kzalloc_node(sizeof(struct amd_uncore), GFP_KERNEL,
 370                         cpu_to_node(cpu));
 371 }
 372
 373 static int amd_uncore_cpu_up_prepare(unsigned int cpu)
 374 {
 375         struct amd_uncore *uncore_nb = NULL, *uncore_llc;
 376
 377         if (amd_uncore_nb) {
 378                 uncore_nb = amd_uncore_alloc(cpu);
 379                 if (!uncore_nb)
 380                         goto fail;
 381                 uncore_nb->cpu = cpu;
 382                 uncore_nb->num_counters = num_counters_nb;
 383                 uncore_nb->rdpmc_base = RDPMC_BASE_NB;
 384                 uncore_nb->msr_base = MSR_F15H_NB_PERF_CTL;
 385                 uncore_nb->active_mask = &amd_nb_active_mask;
 386                 uncore_nb->pmu = &amd_nb_pmu;
 387                 uncore_nb->id = -1;
 388                 *per_cpu_ptr(amd_uncore_nb, cpu) = uncore_nb;
 389         }
 390
 391         if (amd_uncore_llc) {
 392                 uncore_llc = amd_uncore_alloc(cpu);
 393                 if (!uncore_llc)
 394                         goto fail;
 395                 uncore_llc->cpu = cpu;
 396                 uncore_llc->num_counters = num_counters_llc;
 397                 uncore_llc->rdpmc_base = RDPMC_BASE_LLC;
 398                 uncore_llc->msr_base = MSR_F16H_L2I_PERF_CTL;
 399                 uncore_llc->active_mask = &amd_llc_active_mask;
 400                 uncore_llc->pmu = &amd_llc_pmu;
 401                 uncore_llc->id = -1;
 402                 *per_cpu_ptr(amd_uncore_llc, cpu) = uncore_llc;
 403         }
 404
 405         return 0;
 406
 407 fail:
 408         if (amd_uncore_nb)
 409                 *per_cpu_ptr(amd_uncore_nb, cpu) = NULL;
 410         kfree(uncore_nb);
 411         return -ENOMEM;
 412 }
 413
 414 static struct amd_uncore *
 415 amd_uncore_find_online_sibling(struct amd_uncore *this,
 416                                struct amd_uncore * __percpu *uncores)
 417 {
 418         unsigned int cpu;
 419         struct amd_uncore *that;
 420
 421         for_each_online_cpu(cpu) {
 422                 that = *per_cpu_ptr(uncores, cpu);
 423
 424                 if (!that)
 425                         continue;
 426
 427                 if (this == that)
 428                         continue;
 429
 430                 if (this->id == that->id) {
 431                         hlist_add_head(&this->node, &uncore_unused_list);
 432                         this = that;
 433                         break;
 434                 }
 435         }
 436
 437         this->refcnt++;
 438         return this;
 439 }
 440
 441 static int amd_uncore_cpu_starting(unsigned int cpu)
 442 {
 443         unsigned int eax, ebx, ecx, edx;
 444         struct amd_uncore *uncore;
 445
 446         if (amd_uncore_nb) {
 447                 uncore = *per_cpu_ptr(amd_uncore_nb, cpu);
 448                 cpuid(0x8000001e, &eax, &ebx, &ecx, &edx);
 449                 uncore->id = ecx & 0xff;
 450
 451                 uncore = amd_uncore_find_online_sibling(uncore, amd_uncore_nb);
 452                 *per_cpu_ptr(amd_uncore_nb, cpu) = uncore;
 453         }
 454
 455         if (amd_uncore_llc) {
 456                 uncore = *per_cpu_ptr(amd_uncore_llc, cpu);
 457                 uncore->id = get_llc_id(cpu);
 458
 459                 uncore = amd_uncore_find_online_sibling(uncore, amd_uncore_llc);
 460                 *per_cpu_ptr(amd_uncore_llc, cpu) = uncore;
 461         }
 462
 463         return 0;
 464 }
 465
 466 static void uncore_clean_online(void)
 467 {
 468         struct amd_uncore *uncore;
 469         struct hlist_node *n;
 470
 471         hlist_for_each_entry_safe(uncore, n, &uncore_unused_list, node) {
 472                 hlist_del(&uncore->node);
 473                 kfree(uncore);
 474         }
 475 }
 476
 477 static void uncore_online(unsigned int cpu,
 478                           struct amd_uncore * __percpu *uncores)
 479 {
 480         struct amd_uncore *uncore = *per_cpu_ptr(uncores, cpu);
 481
 482         uncore_clean_online();
 483
 484         if (cpu == uncore->cpu)
 485                 cpumask_set_cpu(cpu, uncore->active_mask);
 486 }
 487
 488 static int amd_uncore_cpu_online(unsigned int cpu)
 489 {
 490         if (amd_uncore_nb)
 491                 uncore_online(cpu, amd_uncore_nb);
 492
 493         if (amd_uncore_llc)
 494                 uncore_online(cpu, amd_uncore_llc);
 495
 496         return 0;
 497 }
 498
 499 static void uncore_down_prepare(unsigned int cpu,
 500                                 struct amd_uncore * __percpu *uncores)
 501 {
 502         unsigned int i;
 503         struct amd_uncore *this = *per_cpu_ptr(uncores, cpu);
 504
 505         if (this->cpu != cpu)
 506                 return;
 507
 508         /* this cpu is going down, migrate to a shared sibling if possible */
 509         for_each_online_cpu(i) {
 510                 struct amd_uncore *that = *per_cpu_ptr(uncores, i);
 511
 512                 if (cpu == i)
 513                         continue;
 514
 515                 if (this == that) {
 516                         perf_pmu_migrate_context(this->pmu, cpu, i);
 517                         cpumask_clear_cpu(cpu, that->active_mask);
 518                         cpumask_set_cpu(i, that->active_mask);
 519                         that->cpu = i;
 520                         break;
 521                 }
 522         }
 523 }
 524
 525 static int amd_uncore_cpu_down_prepare(unsigned int cpu)
 526 {
 527         if (amd_uncore_nb)
 528                 uncore_down_prepare(cpu, amd_uncore_nb);
 529
 530         if (amd_uncore_llc)
 531                 uncore_down_prepare(cpu, amd_uncore_llc);
 532
 533         return 0;
 534 }
 535
 536 static void uncore_dead(unsigned int cpu, struct amd_uncore * __percpu *uncores)
 537 {
 538         struct amd_uncore *uncore = *per_cpu_ptr(uncores, cpu);
 539
 540         if (cpu == uncore->cpu)
 541                 cpumask_clear_cpu(cpu, uncore->active_mask);
 542
 543         if (!--uncore->refcnt)
 544                 kfree(uncore);
 545         *per_cpu_ptr(uncores, cpu) = NULL;
 546 }
 547
 548 static int amd_uncore_cpu_dead(unsigned int cpu)
 549 {
 550         if (amd_uncore_nb)
 551                 uncore_dead(cpu, amd_uncore_nb);
 552
 553         if (amd_uncore_llc)
 554                 uncore_dead(cpu, amd_uncore_llc);
 555
 556         return 0;
 557 }
 558
 559 static int __init amd_uncore_init(void)
 560 {
 561         struct attribute **df_attr = amd_uncore_df_format_attr;
 562         struct attribute **l3_attr = amd_uncore_l3_format_attr;
 563         int ret = -ENODEV;
 564
 565         if (boot_cpu_data.x86_vendor != X86_VENDOR_AMD &&
 566             boot_cpu_data.x86_vendor != X86_VENDOR_HYGON)
 567                 return -ENODEV;
 568
 569         if (!boot_cpu_has(X86_FEATURE_TOPOEXT))
 570                 return -ENODEV;
 571
 572         num_counters_nb = NUM_COUNTERS_NB;
 573         num_counters_llc = NUM_COUNTERS_L2;
 574         if (boot_cpu_data.x86 >= 0x17) {
 575                 /*
 576                  * For F17h and above, the Northbridge counters are
 577                  * repurposed as Data Fabric counters. Also, L3
 578                  * counters are supported too. The PMUs are exported
 579                  * based on family as either L2 or L3 and NB or DF.
 580                  */
 581                 num_counters_llc          = NUM_COUNTERS_L3;
 582                 amd_nb_pmu.name           = "amd_df";
 583                 amd_llc_pmu.name          = "amd_l3";
 584                 l3_mask                   = true;
 585         }
 586
 587         if (boot_cpu_has(X86_FEATURE_PERFCTR_NB)) {
 588                 if (boot_cpu_data.x86 >= 0x17)
 589                         *df_attr = &format_attr_event14.attr;
 590
 591                 amd_uncore_nb = alloc_percpu(struct amd_uncore *);
 592                 if (!amd_uncore_nb) {
 593                         ret = -ENOMEM;
 594                         goto fail_nb;
 595                 }
 596                 ret = perf_pmu_register(&amd_nb_pmu, amd_nb_pmu.name, -1);
 597                 if (ret)
 598                         goto fail_nb;
 599
 600                 pr_info("%d %s %s counters detected\n", num_counters_nb,
 601                         boot_cpu_data.x86_vendor == X86_VENDOR_HYGON ?  "HYGON" : "",
 602                         amd_nb_pmu.name);
 603
 604                 ret = 0;
 605         }
 606
 607         if (boot_cpu_has(X86_FEATURE_PERFCTR_LLC)) {
 608                 if (boot_cpu_data.x86 >= 0x19) {
 609                         *l3_attr++ = &format_attr_event8.attr;
 610                         *l3_attr++ = &format_attr_umask.attr;
 611                         *l3_attr++ = &format_attr_coreid.attr;
 612                         *l3_attr++ = &format_attr_enallslices.attr;
 613                         *l3_attr++ = &format_attr_enallcores.attr;
 614                         *l3_attr++ = &format_attr_sliceid.attr;
 615                         *l3_attr++ = &format_attr_threadmask2.attr;
 616                 } else if (boot_cpu_data.x86 >= 0x17) {
 617                         *l3_attr++ = &format_attr_event8.attr;
 618                         *l3_attr++ = &format_attr_umask.attr;
 619                         *l3_attr++ = &format_attr_slicemask.attr;
 620                         *l3_attr++ = &format_attr_threadmask8.attr;
 621                 }
 622
 623                 amd_uncore_llc = alloc_percpu(struct amd_uncore *);
 624                 if (!amd_uncore_llc) {
 625                         ret = -ENOMEM;
 626                         goto fail_llc;
 627                 }
 628                 ret = perf_pmu_register(&amd_llc_pmu, amd_llc_pmu.name, -1);
 629                 if (ret)
 630                         goto fail_llc;
 631
 632                 pr_info("%d %s %s counters detected\n", num_counters_llc,
 633                         boot_cpu_data.x86_vendor == X86_VENDOR_HYGON ?  "HYGON" : "",
 634                         amd_llc_pmu.name);
 635                 ret = 0;
 636         }
 637
 638         /*
 639          * Install callbacks. Core will call them for each online cpu.
 640          */
 641         if (cpuhp_setup_state(CPUHP_PERF_X86_AMD_UNCORE_PREP,
 642                               "perf/x86/amd/uncore:prepare",
 643                               amd_uncore_cpu_up_prepare, amd_uncore_cpu_dead))
 644                 goto fail_llc;
 645
 646         if (cpuhp_setup_state(CPUHP_AP_PERF_X86_AMD_UNCORE_STARTING,
 647                               "perf/x86/amd/uncore:starting",
 648                               amd_uncore_cpu_starting, NULL))
 649                 goto fail_prep;
 650         if (cpuhp_setup_state(CPUHP_AP_PERF_X86_AMD_UNCORE_ONLINE,
 651                               "perf/x86/amd/uncore:online",
 652                               amd_uncore_cpu_online,
 653                               amd_uncore_cpu_down_prepare))
 654                 goto fail_start;
 655         return 0;
 656
 657 fail_start:
 658         cpuhp_remove_state(CPUHP_AP_PERF_X86_AMD_UNCORE_STARTING);
 659 fail_prep:
 660         cpuhp_remove_state(CPUHP_PERF_X86_AMD_UNCORE_PREP);
 661 fail_llc:
 662         if (boot_cpu_has(X86_FEATURE_PERFCTR_NB))
 663                 perf_pmu_unregister(&amd_nb_pmu);
 664         free_percpu(amd_uncore_llc);
 665 fail_nb:
 666         free_percpu(amd_uncore_nb);
 667
 668         return ret;
 669 }
 670
 671 static void __exit amd_uncore_exit(void)
 672 {
 673         cpuhp_remove_state(CPUHP_AP_PERF_X86_AMD_UNCORE_ONLINE);
 674         cpuhp_remove_state(CPUHP_AP_PERF_X86_AMD_UNCORE_STARTING);
 675         cpuhp_remove_state(CPUHP_PERF_X86_AMD_UNCORE_PREP);
 676
 677         if (boot_cpu_has(X86_FEATURE_PERFCTR_LLC)) {
 678                 perf_pmu_unregister(&amd_llc_pmu);
 679                 free_percpu(amd_uncore_llc);
 680                 amd_uncore_llc = NULL;
 681         }
 682
 683         if (boot_cpu_has(X86_FEATURE_PERFCTR_NB)) {
 684                 perf_pmu_unregister(&amd_nb_pmu);
 685                 free_percpu(amd_uncore_nb);
 686                 amd_uncore_nb = NULL;
 687         }
 688 }
 689
 690 module_init(amd_uncore_init);
 691 module_exit(amd_uncore_exit);
 692
 693 MODULE_DESCRIPTION("AMD Uncore Driver");
 694 MODULE_LICENSE("GPL v2");