1 #include <linux/sysdev.h> 2 #include <linux/cpu.h> 3 #include <linux/smp.h> 4 #include <linux/percpu.h> 5 #include <linux/init.h> 6 #include <linux/sched.h> 7 #include <linux/module.h> 8 #include <linux/nodemask.h> 9 #include <linux/cpumask.h> 10 #include <linux/notifier.h> 11 12 #include <asm/current.h> 13 #include <asm/processor.h> 14 #include <asm/cputable.h> 15 #include <asm/firmware.h> 16 #include <asm/hvcall.h> 17 #include <asm/prom.h> 18 #include <asm/paca.h> 19 #include <asm/lppaca.h> 20 #include <asm/machdep.h> 21 #include <asm/smp.h> 22 23 static DEFINE_PER_CPU(struct cpu, cpu_devices); 24 25 static DEFINE_PER_CPU(struct kobject *, cache_toplevel); 26 27 /* SMT stuff */ 28 29 #ifdef CONFIG_PPC_MULTIPLATFORM 30 /* Time in microseconds we delay before sleeping in the idle loop */ 31 DEFINE_PER_CPU(unsigned long, smt_snooze_delay) = { 100 }; 32 33 static ssize_t store_smt_snooze_delay(struct sys_device *dev, 34 struct sysdev_attribute *attr, 35 const char *buf, 36 size_t count) 37 { 38 struct cpu *cpu = container_of(dev, struct cpu, sysdev); 39 ssize_t ret; 40 unsigned long snooze; 41 42 ret = sscanf(buf, "%lu", &snooze); 43 if (ret != 1) 44 return -EINVAL; 45 46 per_cpu(smt_snooze_delay, cpu->sysdev.id) = snooze; 47 48 return count; 49 } 50 51 static ssize_t show_smt_snooze_delay(struct sys_device *dev, 52 struct sysdev_attribute *attr, 53 char *buf) 54 { 55 struct cpu *cpu = container_of(dev, struct cpu, sysdev); 56 57 return sprintf(buf, "%lu\n", per_cpu(smt_snooze_delay, cpu->sysdev.id)); 58 } 59 60 static SYSDEV_ATTR(smt_snooze_delay, 0644, show_smt_snooze_delay, 61 store_smt_snooze_delay); 62 63 /* Only parse OF options if the matching cmdline option was not specified */ 64 static int smt_snooze_cmdline; 65 66 static int __init smt_setup(void) 67 { 68 struct device_node *options; 69 const unsigned int *val; 70 unsigned int cpu; 71 72 if (!cpu_has_feature(CPU_FTR_SMT)) 73 return -ENODEV; 74 75 options = of_find_node_by_path("/options"); 76 if (!options) 77 return -ENODEV; 78 79 val = of_get_property(options, "ibm,smt-snooze-delay", NULL); 80 if (!smt_snooze_cmdline && val) { 81 for_each_possible_cpu(cpu) 82 per_cpu(smt_snooze_delay, cpu) = *val; 83 } 84 85 of_node_put(options); 86 return 0; 87 } 88 __initcall(smt_setup); 89 90 static int __init setup_smt_snooze_delay(char *str) 91 { 92 unsigned int cpu; 93 int snooze; 94 95 if (!cpu_has_feature(CPU_FTR_SMT)) 96 return 1; 97 98 smt_snooze_cmdline = 1; 99 100 if (get_option(&str, &snooze)) { 101 for_each_possible_cpu(cpu) 102 per_cpu(smt_snooze_delay, cpu) = snooze; 103 } 104 105 return 1; 106 } 107 __setup("smt-snooze-delay=", setup_smt_snooze_delay); 108 109 #endif /* CONFIG_PPC_MULTIPLATFORM */ 110 111 /* 112 * Enabling PMCs will slow partition context switch times so we only do 113 * it the first time we write to the PMCs. 114 */ 115 116 static DEFINE_PER_CPU(char, pmcs_enabled); 117 118 void ppc64_enable_pmcs(void) 119 { 120 /* Only need to enable them once */ 121 if (__get_cpu_var(pmcs_enabled)) 122 return; 123 124 __get_cpu_var(pmcs_enabled) = 1; 125 126 if (ppc_md.enable_pmcs) 127 ppc_md.enable_pmcs(); 128 } 129 EXPORT_SYMBOL(ppc64_enable_pmcs); 130 131 /* XXX convert to rusty's on_one_cpu */ 132 static unsigned long run_on_cpu(unsigned long cpu, 133 unsigned long (*func)(unsigned long), 134 unsigned long arg) 135 { 136 cpumask_t old_affinity = current->cpus_allowed; 137 unsigned long ret; 138 139 /* should return -EINVAL to userspace */ 140 if (set_cpus_allowed(current, cpumask_of_cpu(cpu))) 141 return 0; 142 143 ret = func(arg); 144 145 set_cpus_allowed(current, old_affinity); 146 147 return ret; 148 } 149 150 #define SYSFS_PMCSETUP(NAME, ADDRESS) \ 151 static unsigned long read_##NAME(unsigned long junk) \ 152 { \ 153 return mfspr(ADDRESS); \ 154 } \ 155 static unsigned long write_##NAME(unsigned long val) \ 156 { \ 157 ppc64_enable_pmcs(); \ 158 mtspr(ADDRESS, val); \ 159 return 0; \ 160 } \ 161 static ssize_t show_##NAME(struct sys_device *dev, \ 162 struct sysdev_attribute *attr, \ 163 char *buf) \ 164 { \ 165 struct cpu *cpu = container_of(dev, struct cpu, sysdev); \ 166 unsigned long val = run_on_cpu(cpu->sysdev.id, read_##NAME, 0); \ 167 return sprintf(buf, "%lx\n", val); \ 168 } \ 169 static ssize_t __used \ 170 store_##NAME(struct sys_device *dev, struct sysdev_attribute *attr, \ 171 const char *buf, size_t count) \ 172 { \ 173 struct cpu *cpu = container_of(dev, struct cpu, sysdev); \ 174 unsigned long val; \ 175 int ret = sscanf(buf, "%lx", &val); \ 176 if (ret != 1) \ 177 return -EINVAL; \ 178 run_on_cpu(cpu->sysdev.id, write_##NAME, val); \ 179 return count; \ 180 } 181 182 183 /* Let's define all possible registers, we'll only hook up the ones 184 * that are implemented on the current processor 185 */ 186 187 SYSFS_PMCSETUP(mmcr0, SPRN_MMCR0); 188 SYSFS_PMCSETUP(mmcr1, SPRN_MMCR1); 189 SYSFS_PMCSETUP(mmcra, SPRN_MMCRA); 190 SYSFS_PMCSETUP(pmc1, SPRN_PMC1); 191 SYSFS_PMCSETUP(pmc2, SPRN_PMC2); 192 SYSFS_PMCSETUP(pmc3, SPRN_PMC3); 193 SYSFS_PMCSETUP(pmc4, SPRN_PMC4); 194 SYSFS_PMCSETUP(pmc5, SPRN_PMC5); 195 SYSFS_PMCSETUP(pmc6, SPRN_PMC6); 196 SYSFS_PMCSETUP(pmc7, SPRN_PMC7); 197 SYSFS_PMCSETUP(pmc8, SPRN_PMC8); 198 SYSFS_PMCSETUP(purr, SPRN_PURR); 199 SYSFS_PMCSETUP(spurr, SPRN_SPURR); 200 SYSFS_PMCSETUP(dscr, SPRN_DSCR); 201 202 SYSFS_PMCSETUP(pa6t_pmc0, SPRN_PA6T_PMC0); 203 SYSFS_PMCSETUP(pa6t_pmc1, SPRN_PA6T_PMC1); 204 SYSFS_PMCSETUP(pa6t_pmc2, SPRN_PA6T_PMC2); 205 SYSFS_PMCSETUP(pa6t_pmc3, SPRN_PA6T_PMC3); 206 SYSFS_PMCSETUP(pa6t_pmc4, SPRN_PA6T_PMC4); 207 SYSFS_PMCSETUP(pa6t_pmc5, SPRN_PA6T_PMC5); 208 209 #ifdef CONFIG_DEBUG_KERNEL 210 SYSFS_PMCSETUP(hid0, SPRN_HID0); 211 SYSFS_PMCSETUP(hid1, SPRN_HID1); 212 SYSFS_PMCSETUP(hid4, SPRN_HID4); 213 SYSFS_PMCSETUP(hid5, SPRN_HID5); 214 SYSFS_PMCSETUP(ima0, SPRN_PA6T_IMA0); 215 SYSFS_PMCSETUP(ima1, SPRN_PA6T_IMA1); 216 SYSFS_PMCSETUP(ima2, SPRN_PA6T_IMA2); 217 SYSFS_PMCSETUP(ima3, SPRN_PA6T_IMA3); 218 SYSFS_PMCSETUP(ima4, SPRN_PA6T_IMA4); 219 SYSFS_PMCSETUP(ima5, SPRN_PA6T_IMA5); 220 SYSFS_PMCSETUP(ima6, SPRN_PA6T_IMA6); 221 SYSFS_PMCSETUP(ima7, SPRN_PA6T_IMA7); 222 SYSFS_PMCSETUP(ima8, SPRN_PA6T_IMA8); 223 SYSFS_PMCSETUP(ima9, SPRN_PA6T_IMA9); 224 SYSFS_PMCSETUP(imaat, SPRN_PA6T_IMAAT); 225 SYSFS_PMCSETUP(btcr, SPRN_PA6T_BTCR); 226 SYSFS_PMCSETUP(pccr, SPRN_PA6T_PCCR); 227 SYSFS_PMCSETUP(rpccr, SPRN_PA6T_RPCCR); 228 SYSFS_PMCSETUP(der, SPRN_PA6T_DER); 229 SYSFS_PMCSETUP(mer, SPRN_PA6T_MER); 230 SYSFS_PMCSETUP(ber, SPRN_PA6T_BER); 231 SYSFS_PMCSETUP(ier, SPRN_PA6T_IER); 232 SYSFS_PMCSETUP(sier, SPRN_PA6T_SIER); 233 SYSFS_PMCSETUP(siar, SPRN_PA6T_SIAR); 234 SYSFS_PMCSETUP(tsr0, SPRN_PA6T_TSR0); 235 SYSFS_PMCSETUP(tsr1, SPRN_PA6T_TSR1); 236 SYSFS_PMCSETUP(tsr2, SPRN_PA6T_TSR2); 237 SYSFS_PMCSETUP(tsr3, SPRN_PA6T_TSR3); 238 #endif /* CONFIG_DEBUG_KERNEL */ 239 240 static SYSDEV_ATTR(mmcra, 0600, show_mmcra, store_mmcra); 241 static SYSDEV_ATTR(spurr, 0600, show_spurr, NULL); 242 static SYSDEV_ATTR(dscr, 0600, show_dscr, store_dscr); 243 static SYSDEV_ATTR(purr, 0600, show_purr, store_purr); 244 245 static struct sysdev_attribute ibm_common_attrs[] = { 246 _SYSDEV_ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0), 247 _SYSDEV_ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1), 248 }; 249 250 static struct sysdev_attribute ibm_pmc_attrs[] = { 251 _SYSDEV_ATTR(pmc1, 0600, show_pmc1, store_pmc1), 252 _SYSDEV_ATTR(pmc2, 0600, show_pmc2, store_pmc2), 253 _SYSDEV_ATTR(pmc3, 0600, show_pmc3, store_pmc3), 254 _SYSDEV_ATTR(pmc4, 0600, show_pmc4, store_pmc4), 255 _SYSDEV_ATTR(pmc5, 0600, show_pmc5, store_pmc5), 256 _SYSDEV_ATTR(pmc6, 0600, show_pmc6, store_pmc6), 257 _SYSDEV_ATTR(pmc7, 0600, show_pmc7, store_pmc7), 258 _SYSDEV_ATTR(pmc8, 0600, show_pmc8, store_pmc8), 259 }; 260 261 static struct sysdev_attribute pa6t_attrs[] = { 262 _SYSDEV_ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0), 263 _SYSDEV_ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1), 264 _SYSDEV_ATTR(pmc0, 0600, show_pa6t_pmc0, store_pa6t_pmc0), 265 _SYSDEV_ATTR(pmc1, 0600, show_pa6t_pmc1, store_pa6t_pmc1), 266 _SYSDEV_ATTR(pmc2, 0600, show_pa6t_pmc2, store_pa6t_pmc2), 267 _SYSDEV_ATTR(pmc3, 0600, show_pa6t_pmc3, store_pa6t_pmc3), 268 _SYSDEV_ATTR(pmc4, 0600, show_pa6t_pmc4, store_pa6t_pmc4), 269 _SYSDEV_ATTR(pmc5, 0600, show_pa6t_pmc5, store_pa6t_pmc5), 270 #ifdef CONFIG_DEBUG_KERNEL 271 _SYSDEV_ATTR(hid0, 0600, show_hid0, store_hid0), 272 _SYSDEV_ATTR(hid1, 0600, show_hid1, store_hid1), 273 _SYSDEV_ATTR(hid4, 0600, show_hid4, store_hid4), 274 _SYSDEV_ATTR(hid5, 0600, show_hid5, store_hid5), 275 _SYSDEV_ATTR(ima0, 0600, show_ima0, store_ima0), 276 _SYSDEV_ATTR(ima1, 0600, show_ima1, store_ima1), 277 _SYSDEV_ATTR(ima2, 0600, show_ima2, store_ima2), 278 _SYSDEV_ATTR(ima3, 0600, show_ima3, store_ima3), 279 _SYSDEV_ATTR(ima4, 0600, show_ima4, store_ima4), 280 _SYSDEV_ATTR(ima5, 0600, show_ima5, store_ima5), 281 _SYSDEV_ATTR(ima6, 0600, show_ima6, store_ima6), 282 _SYSDEV_ATTR(ima7, 0600, show_ima7, store_ima7), 283 _SYSDEV_ATTR(ima8, 0600, show_ima8, store_ima8), 284 _SYSDEV_ATTR(ima9, 0600, show_ima9, store_ima9), 285 _SYSDEV_ATTR(imaat, 0600, show_imaat, store_imaat), 286 _SYSDEV_ATTR(btcr, 0600, show_btcr, store_btcr), 287 _SYSDEV_ATTR(pccr, 0600, show_pccr, store_pccr), 288 _SYSDEV_ATTR(rpccr, 0600, show_rpccr, store_rpccr), 289 _SYSDEV_ATTR(der, 0600, show_der, store_der), 290 _SYSDEV_ATTR(mer, 0600, show_mer, store_mer), 291 _SYSDEV_ATTR(ber, 0600, show_ber, store_ber), 292 _SYSDEV_ATTR(ier, 0600, show_ier, store_ier), 293 _SYSDEV_ATTR(sier, 0600, show_sier, store_sier), 294 _SYSDEV_ATTR(siar, 0600, show_siar, store_siar), 295 _SYSDEV_ATTR(tsr0, 0600, show_tsr0, store_tsr0), 296 _SYSDEV_ATTR(tsr1, 0600, show_tsr1, store_tsr1), 297 _SYSDEV_ATTR(tsr2, 0600, show_tsr2, store_tsr2), 298 _SYSDEV_ATTR(tsr3, 0600, show_tsr3, store_tsr3), 299 #endif /* CONFIG_DEBUG_KERNEL */ 300 }; 301 302 struct cache_desc { 303 struct kobject kobj; 304 struct cache_desc *next; 305 const char *type; /* Instruction, Data, or Unified */ 306 u32 size; /* total cache size in KB */ 307 u32 line_size; /* in bytes */ 308 u32 nr_sets; /* number of sets */ 309 u32 level; /* e.g. 1, 2, 3... */ 310 u32 associativity; /* e.g. 8-way... 0 is fully associative */ 311 }; 312 313 DEFINE_PER_CPU(struct cache_desc *, cache_desc); 314 315 static struct cache_desc *kobj_to_cache_desc(struct kobject *k) 316 { 317 return container_of(k, struct cache_desc, kobj); 318 } 319 320 static void cache_desc_release(struct kobject *k) 321 { 322 struct cache_desc *desc = kobj_to_cache_desc(k); 323 324 pr_debug("%s: releasing %s\n", __func__, kobject_name(k)); 325 326 if (desc->next) 327 kobject_put(&desc->next->kobj); 328 329 kfree(kobj_to_cache_desc(k)); 330 } 331 332 static ssize_t cache_desc_show(struct kobject *k, struct attribute *attr, char *buf) 333 { 334 struct kobj_attribute *kobj_attr; 335 336 kobj_attr = container_of(attr, struct kobj_attribute, attr); 337 338 return kobj_attr->show(k, kobj_attr, buf); 339 } 340 341 static struct sysfs_ops cache_desc_sysfs_ops = { 342 .show = cache_desc_show, 343 }; 344 345 static struct kobj_type cache_desc_type = { 346 .release = cache_desc_release, 347 .sysfs_ops = &cache_desc_sysfs_ops, 348 }; 349 350 static ssize_t cache_size_show(struct kobject *k, struct kobj_attribute *attr, char *buf) 351 { 352 struct cache_desc *cache = kobj_to_cache_desc(k); 353 354 return sprintf(buf, "%uK\n", cache->size); 355 } 356 357 static struct kobj_attribute cache_size_attr = 358 __ATTR(size, 0444, cache_size_show, NULL); 359 360 static ssize_t cache_line_size_show(struct kobject *k, struct kobj_attribute *attr, char *buf) 361 { 362 struct cache_desc *cache = kobj_to_cache_desc(k); 363 364 return sprintf(buf, "%u\n", cache->line_size); 365 } 366 367 static struct kobj_attribute cache_line_size_attr = 368 __ATTR(coherency_line_size, 0444, cache_line_size_show, NULL); 369 370 static ssize_t cache_nr_sets_show(struct kobject *k, struct kobj_attribute *attr, char *buf) 371 { 372 struct cache_desc *cache = kobj_to_cache_desc(k); 373 374 return sprintf(buf, "%u\n", cache->nr_sets); 375 } 376 377 static struct kobj_attribute cache_nr_sets_attr = 378 __ATTR(number_of_sets, 0444, cache_nr_sets_show, NULL); 379 380 static ssize_t cache_type_show(struct kobject *k, struct kobj_attribute *attr, char *buf) 381 { 382 struct cache_desc *cache = kobj_to_cache_desc(k); 383 384 return sprintf(buf, "%s\n", cache->type); 385 } 386 387 static struct kobj_attribute cache_type_attr = 388 __ATTR(type, 0444, cache_type_show, NULL); 389 390 static ssize_t cache_level_show(struct kobject *k, struct kobj_attribute *attr, char *buf) 391 { 392 struct cache_desc *cache = kobj_to_cache_desc(k); 393 394 return sprintf(buf, "%u\n", cache->level); 395 } 396 397 static struct kobj_attribute cache_level_attr = 398 __ATTR(level, 0444, cache_level_show, NULL); 399 400 static ssize_t cache_assoc_show(struct kobject *k, struct kobj_attribute *attr, char *buf) 401 { 402 struct cache_desc *cache = kobj_to_cache_desc(k); 403 404 return sprintf(buf, "%u\n", cache->associativity); 405 } 406 407 static struct kobj_attribute cache_assoc_attr = 408 __ATTR(ways_of_associativity, 0444, cache_assoc_show, NULL); 409 410 struct cache_desc_info { 411 const char *type; 412 const char *size_prop; 413 const char *line_size_prop; 414 const char *nr_sets_prop; 415 }; 416 417 /* PowerPC Processor binding says the [di]-cache-* must be equal on 418 * unified caches, so just use d-cache properties. */ 419 static struct cache_desc_info ucache_info = { 420 .type = "Unified", 421 .size_prop = "d-cache-size", 422 .line_size_prop = "d-cache-line-size", 423 .nr_sets_prop = "d-cache-sets", 424 }; 425 426 static struct cache_desc_info dcache_info = { 427 .type = "Data", 428 .size_prop = "d-cache-size", 429 .line_size_prop = "d-cache-line-size", 430 .nr_sets_prop = "d-cache-sets", 431 }; 432 433 static struct cache_desc_info icache_info = { 434 .type = "Instruction", 435 .size_prop = "i-cache-size", 436 .line_size_prop = "i-cache-line-size", 437 .nr_sets_prop = "i-cache-sets", 438 }; 439 440 static struct cache_desc * __cpuinit create_cache_desc(struct device_node *np, struct kobject *parent, int index, int level, struct cache_desc_info *info) 441 { 442 const u32 *cache_line_size; 443 struct cache_desc *new; 444 const u32 *cache_size; 445 const u32 *nr_sets; 446 int rc; 447 448 new = kzalloc(sizeof(*new), GFP_KERNEL); 449 if (!new) 450 return NULL; 451 452 rc = kobject_init_and_add(&new->kobj, &cache_desc_type, parent, 453 "index%d", index); 454 if (rc) 455 goto err; 456 457 /* type */ 458 new->type = info->type; 459 rc = sysfs_create_file(&new->kobj, &cache_type_attr.attr); 460 WARN_ON(rc); 461 462 /* level */ 463 new->level = level; 464 rc = sysfs_create_file(&new->kobj, &cache_level_attr.attr); 465 WARN_ON(rc); 466 467 /* size */ 468 cache_size = of_get_property(np, info->size_prop, NULL); 469 if (cache_size) { 470 new->size = *cache_size / 1024; 471 rc = sysfs_create_file(&new->kobj, 472 &cache_size_attr.attr); 473 WARN_ON(rc); 474 } 475 476 /* coherency_line_size */ 477 cache_line_size = of_get_property(np, info->line_size_prop, NULL); 478 if (cache_line_size) { 479 new->line_size = *cache_line_size; 480 rc = sysfs_create_file(&new->kobj, 481 &cache_line_size_attr.attr); 482 WARN_ON(rc); 483 } 484 485 /* number_of_sets */ 486 nr_sets = of_get_property(np, info->nr_sets_prop, NULL); 487 if (nr_sets) { 488 new->nr_sets = *nr_sets; 489 rc = sysfs_create_file(&new->kobj, 490 &cache_nr_sets_attr.attr); 491 WARN_ON(rc); 492 } 493 494 /* ways_of_associativity */ 495 if (new->nr_sets == 1) { 496 /* fully associative */ 497 new->associativity = 0; 498 goto create_assoc; 499 } 500 501 if (new->nr_sets && new->size && new->line_size) { 502 /* If we have values for all of these we can derive 503 * the associativity. */ 504 new->associativity = 505 ((new->size * 1024) / new->nr_sets) / new->line_size; 506 create_assoc: 507 rc = sysfs_create_file(&new->kobj, 508 &cache_assoc_attr.attr); 509 WARN_ON(rc); 510 } 511 512 return new; 513 err: 514 kfree(new); 515 return NULL; 516 } 517 518 static bool cache_is_unified(struct device_node *np) 519 { 520 return of_get_property(np, "cache-unified", NULL); 521 } 522 523 static struct cache_desc * __cpuinit create_cache_index_info(struct device_node *np, struct kobject *parent, int index, int level) 524 { 525 const phandle *next_cache_phandle; 526 struct device_node *next_cache; 527 struct cache_desc *new, **end; 528 529 pr_debug("%s(node = %s, index = %d)\n", __func__, np->full_name, index); 530 531 if (cache_is_unified(np)) { 532 new = create_cache_desc(np, parent, index, level, 533 &ucache_info); 534 } else { 535 new = create_cache_desc(np, parent, index, level, 536 &dcache_info); 537 if (new) { 538 index++; 539 new->next = create_cache_desc(np, parent, index, level, 540 &icache_info); 541 } 542 } 543 if (!new) 544 return NULL; 545 546 end = &new->next; 547 while (*end) 548 end = &(*end)->next; 549 550 next_cache_phandle = of_get_property(np, "l2-cache", NULL); 551 if (!next_cache_phandle) 552 goto out; 553 554 next_cache = of_find_node_by_phandle(*next_cache_phandle); 555 if (!next_cache) 556 goto out; 557 558 *end = create_cache_index_info(next_cache, parent, ++index, ++level); 559 560 of_node_put(next_cache); 561 out: 562 return new; 563 } 564 565 static void __cpuinit create_cache_info(struct sys_device *sysdev) 566 { 567 struct kobject *cache_toplevel; 568 struct device_node *np = NULL; 569 int cpu = sysdev->id; 570 571 cache_toplevel = kobject_create_and_add("cache", &sysdev->kobj); 572 if (!cache_toplevel) 573 return; 574 per_cpu(cache_toplevel, cpu) = cache_toplevel; 575 np = of_get_cpu_node(cpu, NULL); 576 if (np != NULL) { 577 per_cpu(cache_desc, cpu) = 578 create_cache_index_info(np, cache_toplevel, 0, 1); 579 of_node_put(np); 580 } 581 return; 582 } 583 584 static void __cpuinit register_cpu_online(unsigned int cpu) 585 { 586 struct cpu *c = &per_cpu(cpu_devices, cpu); 587 struct sys_device *s = &c->sysdev; 588 struct sysdev_attribute *attrs, *pmc_attrs; 589 int i, nattrs; 590 591 if (!firmware_has_feature(FW_FEATURE_ISERIES) && 592 cpu_has_feature(CPU_FTR_SMT)) 593 sysdev_create_file(s, &attr_smt_snooze_delay); 594 595 /* PMC stuff */ 596 switch (cur_cpu_spec->pmc_type) { 597 case PPC_PMC_IBM: 598 attrs = ibm_common_attrs; 599 nattrs = sizeof(ibm_common_attrs) / sizeof(struct sysdev_attribute); 600 pmc_attrs = ibm_pmc_attrs; 601 break; 602 case PPC_PMC_PA6T: 603 /* PA Semi starts counting at PMC0 */ 604 attrs = pa6t_attrs; 605 nattrs = sizeof(pa6t_attrs) / sizeof(struct sysdev_attribute); 606 pmc_attrs = NULL; 607 break; 608 default: 609 attrs = NULL; 610 nattrs = 0; 611 pmc_attrs = NULL; 612 } 613 614 for (i = 0; i < nattrs; i++) 615 sysdev_create_file(s, &attrs[i]); 616 617 if (pmc_attrs) 618 for (i = 0; i < cur_cpu_spec->num_pmcs; i++) 619 sysdev_create_file(s, &pmc_attrs[i]); 620 621 if (cpu_has_feature(CPU_FTR_MMCRA)) 622 sysdev_create_file(s, &attr_mmcra); 623 624 if (cpu_has_feature(CPU_FTR_PURR)) 625 sysdev_create_file(s, &attr_purr); 626 627 if (cpu_has_feature(CPU_FTR_SPURR)) 628 sysdev_create_file(s, &attr_spurr); 629 630 if (cpu_has_feature(CPU_FTR_DSCR)) 631 sysdev_create_file(s, &attr_dscr); 632 633 create_cache_info(s); 634 } 635 636 #ifdef CONFIG_HOTPLUG_CPU 637 static void remove_cache_info(struct sys_device *sysdev) 638 { 639 struct kobject *cache_toplevel; 640 struct cache_desc *cache_desc; 641 int cpu = sysdev->id; 642 643 cache_desc = per_cpu(cache_desc, cpu); 644 if (cache_desc != NULL) { 645 sysfs_remove_file(&cache_desc->kobj, &cache_size_attr.attr); 646 sysfs_remove_file(&cache_desc->kobj, &cache_line_size_attr.attr); 647 sysfs_remove_file(&cache_desc->kobj, &cache_type_attr.attr); 648 sysfs_remove_file(&cache_desc->kobj, &cache_level_attr.attr); 649 sysfs_remove_file(&cache_desc->kobj, &cache_nr_sets_attr.attr); 650 sysfs_remove_file(&cache_desc->kobj, &cache_assoc_attr.attr); 651 652 kobject_put(&cache_desc->kobj); 653 } 654 cache_toplevel = per_cpu(cache_toplevel, cpu); 655 if (cache_toplevel != NULL) 656 kobject_put(cache_toplevel); 657 } 658 659 static void unregister_cpu_online(unsigned int cpu) 660 { 661 struct cpu *c = &per_cpu(cpu_devices, cpu); 662 struct sys_device *s = &c->sysdev; 663 struct sysdev_attribute *attrs, *pmc_attrs; 664 int i, nattrs; 665 666 BUG_ON(!c->hotpluggable); 667 668 if (!firmware_has_feature(FW_FEATURE_ISERIES) && 669 cpu_has_feature(CPU_FTR_SMT)) 670 sysdev_remove_file(s, &attr_smt_snooze_delay); 671 672 /* PMC stuff */ 673 switch (cur_cpu_spec->pmc_type) { 674 case PPC_PMC_IBM: 675 attrs = ibm_common_attrs; 676 nattrs = sizeof(ibm_common_attrs) / sizeof(struct sysdev_attribute); 677 pmc_attrs = ibm_pmc_attrs; 678 break; 679 case PPC_PMC_PA6T: 680 /* PA Semi starts counting at PMC0 */ 681 attrs = pa6t_attrs; 682 nattrs = sizeof(pa6t_attrs) / sizeof(struct sysdev_attribute); 683 pmc_attrs = NULL; 684 break; 685 default: 686 attrs = NULL; 687 nattrs = 0; 688 pmc_attrs = NULL; 689 } 690 691 for (i = 0; i < nattrs; i++) 692 sysdev_remove_file(s, &attrs[i]); 693 694 if (pmc_attrs) 695 for (i = 0; i < cur_cpu_spec->num_pmcs; i++) 696 sysdev_remove_file(s, &pmc_attrs[i]); 697 698 if (cpu_has_feature(CPU_FTR_MMCRA)) 699 sysdev_remove_file(s, &attr_mmcra); 700 701 if (cpu_has_feature(CPU_FTR_PURR)) 702 sysdev_remove_file(s, &attr_purr); 703 704 if (cpu_has_feature(CPU_FTR_SPURR)) 705 sysdev_remove_file(s, &attr_spurr); 706 707 if (cpu_has_feature(CPU_FTR_DSCR)) 708 sysdev_remove_file(s, &attr_dscr); 709 710 remove_cache_info(s); 711 } 712 #endif /* CONFIG_HOTPLUG_CPU */ 713 714 static int __cpuinit sysfs_cpu_notify(struct notifier_block *self, 715 unsigned long action, void *hcpu) 716 { 717 unsigned int cpu = (unsigned int)(long)hcpu; 718 719 switch (action) { 720 case CPU_ONLINE: 721 case CPU_ONLINE_FROZEN: 722 register_cpu_online(cpu); 723 break; 724 #ifdef CONFIG_HOTPLUG_CPU 725 case CPU_DEAD: 726 case CPU_DEAD_FROZEN: 727 unregister_cpu_online(cpu); 728 break; 729 #endif 730 } 731 return NOTIFY_OK; 732 } 733 734 static struct notifier_block __cpuinitdata sysfs_cpu_nb = { 735 .notifier_call = sysfs_cpu_notify, 736 }; 737 738 static DEFINE_MUTEX(cpu_mutex); 739 740 int cpu_add_sysdev_attr(struct sysdev_attribute *attr) 741 { 742 int cpu; 743 744 mutex_lock(&cpu_mutex); 745 746 for_each_possible_cpu(cpu) { 747 sysdev_create_file(get_cpu_sysdev(cpu), attr); 748 } 749 750 mutex_unlock(&cpu_mutex); 751 return 0; 752 } 753 EXPORT_SYMBOL_GPL(cpu_add_sysdev_attr); 754 755 int cpu_add_sysdev_attr_group(struct attribute_group *attrs) 756 { 757 int cpu; 758 struct sys_device *sysdev; 759 int ret; 760 761 mutex_lock(&cpu_mutex); 762 763 for_each_possible_cpu(cpu) { 764 sysdev = get_cpu_sysdev(cpu); 765 ret = sysfs_create_group(&sysdev->kobj, attrs); 766 WARN_ON(ret != 0); 767 } 768 769 mutex_unlock(&cpu_mutex); 770 return 0; 771 } 772 EXPORT_SYMBOL_GPL(cpu_add_sysdev_attr_group); 773 774 775 void cpu_remove_sysdev_attr(struct sysdev_attribute *attr) 776 { 777 int cpu; 778 779 mutex_lock(&cpu_mutex); 780 781 for_each_possible_cpu(cpu) { 782 sysdev_remove_file(get_cpu_sysdev(cpu), attr); 783 } 784 785 mutex_unlock(&cpu_mutex); 786 } 787 EXPORT_SYMBOL_GPL(cpu_remove_sysdev_attr); 788 789 void cpu_remove_sysdev_attr_group(struct attribute_group *attrs) 790 { 791 int cpu; 792 struct sys_device *sysdev; 793 794 mutex_lock(&cpu_mutex); 795 796 for_each_possible_cpu(cpu) { 797 sysdev = get_cpu_sysdev(cpu); 798 sysfs_remove_group(&sysdev->kobj, attrs); 799 } 800 801 mutex_unlock(&cpu_mutex); 802 } 803 EXPORT_SYMBOL_GPL(cpu_remove_sysdev_attr_group); 804 805 806 /* NUMA stuff */ 807 808 #ifdef CONFIG_NUMA 809 static void register_nodes(void) 810 { 811 int i; 812 813 for (i = 0; i < MAX_NUMNODES; i++) 814 register_one_node(i); 815 } 816 817 int sysfs_add_device_to_node(struct sys_device *dev, int nid) 818 { 819 struct node *node = &node_devices[nid]; 820 return sysfs_create_link(&node->sysdev.kobj, &dev->kobj, 821 kobject_name(&dev->kobj)); 822 } 823 EXPORT_SYMBOL_GPL(sysfs_add_device_to_node); 824 825 void sysfs_remove_device_from_node(struct sys_device *dev, int nid) 826 { 827 struct node *node = &node_devices[nid]; 828 sysfs_remove_link(&node->sysdev.kobj, kobject_name(&dev->kobj)); 829 } 830 EXPORT_SYMBOL_GPL(sysfs_remove_device_from_node); 831 832 #else 833 static void register_nodes(void) 834 { 835 return; 836 } 837 838 #endif 839 840 /* Only valid if CPU is present. */ 841 static ssize_t show_physical_id(struct sys_device *dev, 842 struct sysdev_attribute *attr, char *buf) 843 { 844 struct cpu *cpu = container_of(dev, struct cpu, sysdev); 845 846 return sprintf(buf, "%d\n", get_hard_smp_processor_id(cpu->sysdev.id)); 847 } 848 static SYSDEV_ATTR(physical_id, 0444, show_physical_id, NULL); 849 850 static int __init topology_init(void) 851 { 852 int cpu; 853 854 register_nodes(); 855 register_cpu_notifier(&sysfs_cpu_nb); 856 857 for_each_possible_cpu(cpu) { 858 struct cpu *c = &per_cpu(cpu_devices, cpu); 859 860 /* 861 * For now, we just see if the system supports making 862 * the RTAS calls for CPU hotplug. But, there may be a 863 * more comprehensive way to do this for an individual 864 * CPU. For instance, the boot cpu might never be valid 865 * for hotplugging. 866 */ 867 if (ppc_md.cpu_die) 868 c->hotpluggable = 1; 869 870 if (cpu_online(cpu) || c->hotpluggable) { 871 register_cpu(c, cpu); 872 873 sysdev_create_file(&c->sysdev, &attr_physical_id); 874 } 875 876 if (cpu_online(cpu)) 877 register_cpu_online(cpu); 878 } 879 880 return 0; 881 } 882 subsys_initcall(topology_init); 883