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/machdep.h> 19 #include <asm/smp.h> 20 21 #ifdef CONFIG_PPC64 22 #include <asm/paca.h> 23 #include <asm/lppaca.h> 24 #endif 25 26 static DEFINE_PER_CPU(struct cpu, cpu_devices); 27 28 static DEFINE_PER_CPU(struct kobject *, cache_toplevel); 29 30 /* 31 * SMT snooze delay stuff, 64-bit only for now 32 */ 33 34 #ifdef CONFIG_PPC64 35 36 /* Time in microseconds we delay before sleeping in the idle loop */ 37 DEFINE_PER_CPU(unsigned long, smt_snooze_delay) = { 100 }; 38 39 static ssize_t store_smt_snooze_delay(struct sys_device *dev, 40 struct sysdev_attribute *attr, 41 const char *buf, 42 size_t count) 43 { 44 struct cpu *cpu = container_of(dev, struct cpu, sysdev); 45 ssize_t ret; 46 unsigned long snooze; 47 48 ret = sscanf(buf, "%lu", &snooze); 49 if (ret != 1) 50 return -EINVAL; 51 52 per_cpu(smt_snooze_delay, cpu->sysdev.id) = snooze; 53 54 return count; 55 } 56 57 static ssize_t show_smt_snooze_delay(struct sys_device *dev, 58 struct sysdev_attribute *attr, 59 char *buf) 60 { 61 struct cpu *cpu = container_of(dev, struct cpu, sysdev); 62 63 return sprintf(buf, "%lu\n", per_cpu(smt_snooze_delay, cpu->sysdev.id)); 64 } 65 66 static SYSDEV_ATTR(smt_snooze_delay, 0644, show_smt_snooze_delay, 67 store_smt_snooze_delay); 68 69 /* Only parse OF options if the matching cmdline option was not specified */ 70 static int smt_snooze_cmdline; 71 72 static int __init smt_setup(void) 73 { 74 struct device_node *options; 75 const unsigned int *val; 76 unsigned int cpu; 77 78 if (!cpu_has_feature(CPU_FTR_SMT)) 79 return -ENODEV; 80 81 options = of_find_node_by_path("/options"); 82 if (!options) 83 return -ENODEV; 84 85 val = of_get_property(options, "ibm,smt-snooze-delay", NULL); 86 if (!smt_snooze_cmdline && val) { 87 for_each_possible_cpu(cpu) 88 per_cpu(smt_snooze_delay, cpu) = *val; 89 } 90 91 of_node_put(options); 92 return 0; 93 } 94 __initcall(smt_setup); 95 96 static int __init setup_smt_snooze_delay(char *str) 97 { 98 unsigned int cpu; 99 int snooze; 100 101 if (!cpu_has_feature(CPU_FTR_SMT)) 102 return 1; 103 104 smt_snooze_cmdline = 1; 105 106 if (get_option(&str, &snooze)) { 107 for_each_possible_cpu(cpu) 108 per_cpu(smt_snooze_delay, cpu) = snooze; 109 } 110 111 return 1; 112 } 113 __setup("smt-snooze-delay=", setup_smt_snooze_delay); 114 115 #endif /* CONFIG_PPC64 */ 116 117 /* 118 * Enabling PMCs will slow partition context switch times so we only do 119 * it the first time we write to the PMCs. 120 */ 121 122 static DEFINE_PER_CPU(char, pmcs_enabled); 123 124 void ppc_enable_pmcs(void) 125 { 126 /* Only need to enable them once */ 127 if (__get_cpu_var(pmcs_enabled)) 128 return; 129 130 __get_cpu_var(pmcs_enabled) = 1; 131 132 if (ppc_md.enable_pmcs) 133 ppc_md.enable_pmcs(); 134 } 135 EXPORT_SYMBOL(ppc_enable_pmcs); 136 137 /* XXX convert to rusty's on_one_cpu */ 138 static unsigned long run_on_cpu(unsigned long cpu, 139 unsigned long (*func)(unsigned long), 140 unsigned long arg) 141 { 142 cpumask_t old_affinity = current->cpus_allowed; 143 unsigned long ret; 144 145 /* should return -EINVAL to userspace */ 146 if (set_cpus_allowed(current, cpumask_of_cpu(cpu))) 147 return 0; 148 149 ret = func(arg); 150 151 set_cpus_allowed(current, old_affinity); 152 153 return ret; 154 } 155 156 #define SYSFS_PMCSETUP(NAME, ADDRESS) \ 157 static unsigned long read_##NAME(unsigned long junk) \ 158 { \ 159 return mfspr(ADDRESS); \ 160 } \ 161 static unsigned long write_##NAME(unsigned long val) \ 162 { \ 163 ppc_enable_pmcs(); \ 164 mtspr(ADDRESS, val); \ 165 return 0; \ 166 } \ 167 static ssize_t show_##NAME(struct sys_device *dev, \ 168 struct sysdev_attribute *attr, \ 169 char *buf) \ 170 { \ 171 struct cpu *cpu = container_of(dev, struct cpu, sysdev); \ 172 unsigned long val = run_on_cpu(cpu->sysdev.id, read_##NAME, 0); \ 173 return sprintf(buf, "%lx\n", val); \ 174 } \ 175 static ssize_t __used \ 176 store_##NAME(struct sys_device *dev, struct sysdev_attribute *attr, \ 177 const char *buf, size_t count) \ 178 { \ 179 struct cpu *cpu = container_of(dev, struct cpu, sysdev); \ 180 unsigned long val; \ 181 int ret = sscanf(buf, "%lx", &val); \ 182 if (ret != 1) \ 183 return -EINVAL; \ 184 run_on_cpu(cpu->sysdev.id, write_##NAME, val); \ 185 return count; \ 186 } 187 188 189 /* Let's define all possible registers, we'll only hook up the ones 190 * that are implemented on the current processor 191 */ 192 193 #ifdef CONFIG_PPC64 194 #define HAS_PPC_PMC_CLASSIC 1 195 #define HAS_PPC_PMC_IBM 1 196 #define HAS_PPC_PMC_PA6T 1 197 #elif CONFIG_6xx 198 #define HAS_PPC_PMC_CLASSIC 1 199 #define HAS_PPC_PMC_IBM 1 200 #define HAS_PPC_PMC_G4 1 201 #endif 202 203 204 #ifdef HAS_PPC_PMC_CLASSIC 205 SYSFS_PMCSETUP(mmcr0, SPRN_MMCR0); 206 SYSFS_PMCSETUP(mmcr1, SPRN_MMCR1); 207 SYSFS_PMCSETUP(pmc1, SPRN_PMC1); 208 SYSFS_PMCSETUP(pmc2, SPRN_PMC2); 209 SYSFS_PMCSETUP(pmc3, SPRN_PMC3); 210 SYSFS_PMCSETUP(pmc4, SPRN_PMC4); 211 SYSFS_PMCSETUP(pmc5, SPRN_PMC5); 212 SYSFS_PMCSETUP(pmc6, SPRN_PMC6); 213 214 #ifdef HAS_PPC_PMC_G4 215 SYSFS_PMCSETUP(mmcr2, SPRN_MMCR2); 216 #endif 217 218 #ifdef CONFIG_PPC64 219 SYSFS_PMCSETUP(pmc7, SPRN_PMC7); 220 SYSFS_PMCSETUP(pmc8, SPRN_PMC8); 221 222 SYSFS_PMCSETUP(mmcra, SPRN_MMCRA); 223 SYSFS_PMCSETUP(purr, SPRN_PURR); 224 SYSFS_PMCSETUP(spurr, SPRN_SPURR); 225 SYSFS_PMCSETUP(dscr, SPRN_DSCR); 226 227 static SYSDEV_ATTR(mmcra, 0600, show_mmcra, store_mmcra); 228 static SYSDEV_ATTR(spurr, 0600, show_spurr, NULL); 229 static SYSDEV_ATTR(dscr, 0600, show_dscr, store_dscr); 230 static SYSDEV_ATTR(purr, 0600, show_purr, store_purr); 231 #endif /* CONFIG_PPC64 */ 232 233 #ifdef HAS_PPC_PMC_PA6T 234 SYSFS_PMCSETUP(pa6t_pmc0, SPRN_PA6T_PMC0); 235 SYSFS_PMCSETUP(pa6t_pmc1, SPRN_PA6T_PMC1); 236 SYSFS_PMCSETUP(pa6t_pmc2, SPRN_PA6T_PMC2); 237 SYSFS_PMCSETUP(pa6t_pmc3, SPRN_PA6T_PMC3); 238 SYSFS_PMCSETUP(pa6t_pmc4, SPRN_PA6T_PMC4); 239 SYSFS_PMCSETUP(pa6t_pmc5, SPRN_PA6T_PMC5); 240 #ifdef CONFIG_DEBUG_KERNEL 241 SYSFS_PMCSETUP(hid0, SPRN_HID0); 242 SYSFS_PMCSETUP(hid1, SPRN_HID1); 243 SYSFS_PMCSETUP(hid4, SPRN_HID4); 244 SYSFS_PMCSETUP(hid5, SPRN_HID5); 245 SYSFS_PMCSETUP(ima0, SPRN_PA6T_IMA0); 246 SYSFS_PMCSETUP(ima1, SPRN_PA6T_IMA1); 247 SYSFS_PMCSETUP(ima2, SPRN_PA6T_IMA2); 248 SYSFS_PMCSETUP(ima3, SPRN_PA6T_IMA3); 249 SYSFS_PMCSETUP(ima4, SPRN_PA6T_IMA4); 250 SYSFS_PMCSETUP(ima5, SPRN_PA6T_IMA5); 251 SYSFS_PMCSETUP(ima6, SPRN_PA6T_IMA6); 252 SYSFS_PMCSETUP(ima7, SPRN_PA6T_IMA7); 253 SYSFS_PMCSETUP(ima8, SPRN_PA6T_IMA8); 254 SYSFS_PMCSETUP(ima9, SPRN_PA6T_IMA9); 255 SYSFS_PMCSETUP(imaat, SPRN_PA6T_IMAAT); 256 SYSFS_PMCSETUP(btcr, SPRN_PA6T_BTCR); 257 SYSFS_PMCSETUP(pccr, SPRN_PA6T_PCCR); 258 SYSFS_PMCSETUP(rpccr, SPRN_PA6T_RPCCR); 259 SYSFS_PMCSETUP(der, SPRN_PA6T_DER); 260 SYSFS_PMCSETUP(mer, SPRN_PA6T_MER); 261 SYSFS_PMCSETUP(ber, SPRN_PA6T_BER); 262 SYSFS_PMCSETUP(ier, SPRN_PA6T_IER); 263 SYSFS_PMCSETUP(sier, SPRN_PA6T_SIER); 264 SYSFS_PMCSETUP(siar, SPRN_PA6T_SIAR); 265 SYSFS_PMCSETUP(tsr0, SPRN_PA6T_TSR0); 266 SYSFS_PMCSETUP(tsr1, SPRN_PA6T_TSR1); 267 SYSFS_PMCSETUP(tsr2, SPRN_PA6T_TSR2); 268 SYSFS_PMCSETUP(tsr3, SPRN_PA6T_TSR3); 269 #endif /* CONFIG_DEBUG_KERNEL */ 270 #endif /* HAS_PPC_PMC_PA6T */ 271 272 #ifdef HAS_PPC_PMC_IBM 273 static struct sysdev_attribute ibm_common_attrs[] = { 274 _SYSDEV_ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0), 275 _SYSDEV_ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1), 276 }; 277 #endif /* HAS_PPC_PMC_G4 */ 278 279 #ifdef HAS_PPC_PMC_G4 280 static struct sysdev_attribute g4_common_attrs[] = { 281 _SYSDEV_ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0), 282 _SYSDEV_ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1), 283 _SYSDEV_ATTR(mmcr2, 0600, show_mmcr2, store_mmcr2), 284 }; 285 #endif /* HAS_PPC_PMC_G4 */ 286 287 static struct sysdev_attribute classic_pmc_attrs[] = { 288 _SYSDEV_ATTR(pmc1, 0600, show_pmc1, store_pmc1), 289 _SYSDEV_ATTR(pmc2, 0600, show_pmc2, store_pmc2), 290 _SYSDEV_ATTR(pmc3, 0600, show_pmc3, store_pmc3), 291 _SYSDEV_ATTR(pmc4, 0600, show_pmc4, store_pmc4), 292 _SYSDEV_ATTR(pmc5, 0600, show_pmc5, store_pmc5), 293 _SYSDEV_ATTR(pmc6, 0600, show_pmc6, store_pmc6), 294 #ifdef CONFIG_PPC64 295 _SYSDEV_ATTR(pmc7, 0600, show_pmc7, store_pmc7), 296 _SYSDEV_ATTR(pmc8, 0600, show_pmc8, store_pmc8), 297 #endif 298 }; 299 300 #ifdef HAS_PPC_PMC_PA6T 301 static struct sysdev_attribute pa6t_attrs[] = { 302 _SYSDEV_ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0), 303 _SYSDEV_ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1), 304 _SYSDEV_ATTR(pmc0, 0600, show_pa6t_pmc0, store_pa6t_pmc0), 305 _SYSDEV_ATTR(pmc1, 0600, show_pa6t_pmc1, store_pa6t_pmc1), 306 _SYSDEV_ATTR(pmc2, 0600, show_pa6t_pmc2, store_pa6t_pmc2), 307 _SYSDEV_ATTR(pmc3, 0600, show_pa6t_pmc3, store_pa6t_pmc3), 308 _SYSDEV_ATTR(pmc4, 0600, show_pa6t_pmc4, store_pa6t_pmc4), 309 _SYSDEV_ATTR(pmc5, 0600, show_pa6t_pmc5, store_pa6t_pmc5), 310 #ifdef CONFIG_DEBUG_KERNEL 311 _SYSDEV_ATTR(hid0, 0600, show_hid0, store_hid0), 312 _SYSDEV_ATTR(hid1, 0600, show_hid1, store_hid1), 313 _SYSDEV_ATTR(hid4, 0600, show_hid4, store_hid4), 314 _SYSDEV_ATTR(hid5, 0600, show_hid5, store_hid5), 315 _SYSDEV_ATTR(ima0, 0600, show_ima0, store_ima0), 316 _SYSDEV_ATTR(ima1, 0600, show_ima1, store_ima1), 317 _SYSDEV_ATTR(ima2, 0600, show_ima2, store_ima2), 318 _SYSDEV_ATTR(ima3, 0600, show_ima3, store_ima3), 319 _SYSDEV_ATTR(ima4, 0600, show_ima4, store_ima4), 320 _SYSDEV_ATTR(ima5, 0600, show_ima5, store_ima5), 321 _SYSDEV_ATTR(ima6, 0600, show_ima6, store_ima6), 322 _SYSDEV_ATTR(ima7, 0600, show_ima7, store_ima7), 323 _SYSDEV_ATTR(ima8, 0600, show_ima8, store_ima8), 324 _SYSDEV_ATTR(ima9, 0600, show_ima9, store_ima9), 325 _SYSDEV_ATTR(imaat, 0600, show_imaat, store_imaat), 326 _SYSDEV_ATTR(btcr, 0600, show_btcr, store_btcr), 327 _SYSDEV_ATTR(pccr, 0600, show_pccr, store_pccr), 328 _SYSDEV_ATTR(rpccr, 0600, show_rpccr, store_rpccr), 329 _SYSDEV_ATTR(der, 0600, show_der, store_der), 330 _SYSDEV_ATTR(mer, 0600, show_mer, store_mer), 331 _SYSDEV_ATTR(ber, 0600, show_ber, store_ber), 332 _SYSDEV_ATTR(ier, 0600, show_ier, store_ier), 333 _SYSDEV_ATTR(sier, 0600, show_sier, store_sier), 334 _SYSDEV_ATTR(siar, 0600, show_siar, store_siar), 335 _SYSDEV_ATTR(tsr0, 0600, show_tsr0, store_tsr0), 336 _SYSDEV_ATTR(tsr1, 0600, show_tsr1, store_tsr1), 337 _SYSDEV_ATTR(tsr2, 0600, show_tsr2, store_tsr2), 338 _SYSDEV_ATTR(tsr3, 0600, show_tsr3, store_tsr3), 339 #endif /* CONFIG_DEBUG_KERNEL */ 340 }; 341 #endif /* HAS_PPC_PMC_PA6T */ 342 #endif /* HAS_PPC_PMC_CLASSIC */ 343 344 struct cache_desc { 345 struct kobject kobj; 346 struct cache_desc *next; 347 const char *type; /* Instruction, Data, or Unified */ 348 u32 size; /* total cache size in KB */ 349 u32 line_size; /* in bytes */ 350 u32 nr_sets; /* number of sets */ 351 u32 level; /* e.g. 1, 2, 3... */ 352 u32 associativity; /* e.g. 8-way... 0 is fully associative */ 353 }; 354 355 DEFINE_PER_CPU(struct cache_desc *, cache_desc); 356 357 static struct cache_desc *kobj_to_cache_desc(struct kobject *k) 358 { 359 return container_of(k, struct cache_desc, kobj); 360 } 361 362 static void cache_desc_release(struct kobject *k) 363 { 364 struct cache_desc *desc = kobj_to_cache_desc(k); 365 366 pr_debug("%s: releasing %s\n", __func__, kobject_name(k)); 367 368 if (desc->next) 369 kobject_put(&desc->next->kobj); 370 371 kfree(kobj_to_cache_desc(k)); 372 } 373 374 static ssize_t cache_desc_show(struct kobject *k, struct attribute *attr, char *buf) 375 { 376 struct kobj_attribute *kobj_attr; 377 378 kobj_attr = container_of(attr, struct kobj_attribute, attr); 379 380 return kobj_attr->show(k, kobj_attr, buf); 381 } 382 383 static struct sysfs_ops cache_desc_sysfs_ops = { 384 .show = cache_desc_show, 385 }; 386 387 static struct kobj_type cache_desc_type = { 388 .release = cache_desc_release, 389 .sysfs_ops = &cache_desc_sysfs_ops, 390 }; 391 392 static ssize_t cache_size_show(struct kobject *k, struct kobj_attribute *attr, char *buf) 393 { 394 struct cache_desc *cache = kobj_to_cache_desc(k); 395 396 return sprintf(buf, "%uK\n", cache->size); 397 } 398 399 static struct kobj_attribute cache_size_attr = 400 __ATTR(size, 0444, cache_size_show, NULL); 401 402 static ssize_t cache_line_size_show(struct kobject *k, struct kobj_attribute *attr, char *buf) 403 { 404 struct cache_desc *cache = kobj_to_cache_desc(k); 405 406 return sprintf(buf, "%u\n", cache->line_size); 407 } 408 409 static struct kobj_attribute cache_line_size_attr = 410 __ATTR(coherency_line_size, 0444, cache_line_size_show, NULL); 411 412 static ssize_t cache_nr_sets_show(struct kobject *k, struct kobj_attribute *attr, char *buf) 413 { 414 struct cache_desc *cache = kobj_to_cache_desc(k); 415 416 return sprintf(buf, "%u\n", cache->nr_sets); 417 } 418 419 static struct kobj_attribute cache_nr_sets_attr = 420 __ATTR(number_of_sets, 0444, cache_nr_sets_show, NULL); 421 422 static ssize_t cache_type_show(struct kobject *k, struct kobj_attribute *attr, char *buf) 423 { 424 struct cache_desc *cache = kobj_to_cache_desc(k); 425 426 return sprintf(buf, "%s\n", cache->type); 427 } 428 429 static struct kobj_attribute cache_type_attr = 430 __ATTR(type, 0444, cache_type_show, NULL); 431 432 static ssize_t cache_level_show(struct kobject *k, struct kobj_attribute *attr, char *buf) 433 { 434 struct cache_desc *cache = kobj_to_cache_desc(k); 435 436 return sprintf(buf, "%u\n", cache->level); 437 } 438 439 static struct kobj_attribute cache_level_attr = 440 __ATTR(level, 0444, cache_level_show, NULL); 441 442 static ssize_t cache_assoc_show(struct kobject *k, struct kobj_attribute *attr, char *buf) 443 { 444 struct cache_desc *cache = kobj_to_cache_desc(k); 445 446 return sprintf(buf, "%u\n", cache->associativity); 447 } 448 449 static struct kobj_attribute cache_assoc_attr = 450 __ATTR(ways_of_associativity, 0444, cache_assoc_show, NULL); 451 452 struct cache_desc_info { 453 const char *type; 454 const char *size_prop; 455 const char *line_size_prop; 456 const char *nr_sets_prop; 457 }; 458 459 /* PowerPC Processor binding says the [di]-cache-* must be equal on 460 * unified caches, so just use d-cache properties. */ 461 static struct cache_desc_info ucache_info = { 462 .type = "Unified", 463 .size_prop = "d-cache-size", 464 .line_size_prop = "d-cache-line-size", 465 .nr_sets_prop = "d-cache-sets", 466 }; 467 468 static struct cache_desc_info dcache_info = { 469 .type = "Data", 470 .size_prop = "d-cache-size", 471 .line_size_prop = "d-cache-line-size", 472 .nr_sets_prop = "d-cache-sets", 473 }; 474 475 static struct cache_desc_info icache_info = { 476 .type = "Instruction", 477 .size_prop = "i-cache-size", 478 .line_size_prop = "i-cache-line-size", 479 .nr_sets_prop = "i-cache-sets", 480 }; 481 482 static struct cache_desc * __cpuinit create_cache_desc(struct device_node *np, struct kobject *parent, int index, int level, struct cache_desc_info *info) 483 { 484 const u32 *cache_line_size; 485 struct cache_desc *new; 486 const u32 *cache_size; 487 const u32 *nr_sets; 488 int rc; 489 490 new = kzalloc(sizeof(*new), GFP_KERNEL); 491 if (!new) 492 return NULL; 493 494 rc = kobject_init_and_add(&new->kobj, &cache_desc_type, parent, 495 "index%d", index); 496 if (rc) 497 goto err; 498 499 /* type */ 500 new->type = info->type; 501 rc = sysfs_create_file(&new->kobj, &cache_type_attr.attr); 502 WARN_ON(rc); 503 504 /* level */ 505 new->level = level; 506 rc = sysfs_create_file(&new->kobj, &cache_level_attr.attr); 507 WARN_ON(rc); 508 509 /* size */ 510 cache_size = of_get_property(np, info->size_prop, NULL); 511 if (cache_size) { 512 new->size = *cache_size / 1024; 513 rc = sysfs_create_file(&new->kobj, 514 &cache_size_attr.attr); 515 WARN_ON(rc); 516 } 517 518 /* coherency_line_size */ 519 cache_line_size = of_get_property(np, info->line_size_prop, NULL); 520 if (cache_line_size) { 521 new->line_size = *cache_line_size; 522 rc = sysfs_create_file(&new->kobj, 523 &cache_line_size_attr.attr); 524 WARN_ON(rc); 525 } 526 527 /* number_of_sets */ 528 nr_sets = of_get_property(np, info->nr_sets_prop, NULL); 529 if (nr_sets) { 530 new->nr_sets = *nr_sets; 531 rc = sysfs_create_file(&new->kobj, 532 &cache_nr_sets_attr.attr); 533 WARN_ON(rc); 534 } 535 536 /* ways_of_associativity */ 537 if (new->nr_sets == 1) { 538 /* fully associative */ 539 new->associativity = 0; 540 goto create_assoc; 541 } 542 543 if (new->nr_sets && new->size && new->line_size) { 544 /* If we have values for all of these we can derive 545 * the associativity. */ 546 new->associativity = 547 ((new->size * 1024) / new->nr_sets) / new->line_size; 548 create_assoc: 549 rc = sysfs_create_file(&new->kobj, 550 &cache_assoc_attr.attr); 551 WARN_ON(rc); 552 } 553 554 return new; 555 err: 556 kfree(new); 557 return NULL; 558 } 559 560 static bool cache_is_unified(struct device_node *np) 561 { 562 return of_get_property(np, "cache-unified", NULL); 563 } 564 565 static struct cache_desc * __cpuinit create_cache_index_info(struct device_node *np, struct kobject *parent, int index, int level) 566 { 567 const phandle *next_cache_phandle; 568 struct device_node *next_cache; 569 struct cache_desc *new, **end; 570 571 pr_debug("%s(node = %s, index = %d)\n", __func__, np->full_name, index); 572 573 if (cache_is_unified(np)) { 574 new = create_cache_desc(np, parent, index, level, 575 &ucache_info); 576 } else { 577 new = create_cache_desc(np, parent, index, level, 578 &dcache_info); 579 if (new) { 580 index++; 581 new->next = create_cache_desc(np, parent, index, level, 582 &icache_info); 583 } 584 } 585 if (!new) 586 return NULL; 587 588 end = &new->next; 589 while (*end) 590 end = &(*end)->next; 591 592 next_cache_phandle = of_get_property(np, "l2-cache", NULL); 593 if (!next_cache_phandle) 594 goto out; 595 596 next_cache = of_find_node_by_phandle(*next_cache_phandle); 597 if (!next_cache) 598 goto out; 599 600 *end = create_cache_index_info(next_cache, parent, ++index, ++level); 601 602 of_node_put(next_cache); 603 out: 604 return new; 605 } 606 607 static void __cpuinit create_cache_info(struct sys_device *sysdev) 608 { 609 struct kobject *cache_toplevel; 610 struct device_node *np = NULL; 611 int cpu = sysdev->id; 612 613 cache_toplevel = kobject_create_and_add("cache", &sysdev->kobj); 614 if (!cache_toplevel) 615 return; 616 per_cpu(cache_toplevel, cpu) = cache_toplevel; 617 np = of_get_cpu_node(cpu, NULL); 618 if (np != NULL) { 619 per_cpu(cache_desc, cpu) = 620 create_cache_index_info(np, cache_toplevel, 0, 1); 621 of_node_put(np); 622 } 623 return; 624 } 625 626 static void __cpuinit register_cpu_online(unsigned int cpu) 627 { 628 struct cpu *c = &per_cpu(cpu_devices, cpu); 629 struct sys_device *s = &c->sysdev; 630 struct sysdev_attribute *attrs, *pmc_attrs; 631 int i, nattrs; 632 633 #ifdef CONFIG_PPC64 634 if (!firmware_has_feature(FW_FEATURE_ISERIES) && 635 cpu_has_feature(CPU_FTR_SMT)) 636 sysdev_create_file(s, &attr_smt_snooze_delay); 637 #endif 638 639 /* PMC stuff */ 640 switch (cur_cpu_spec->pmc_type) { 641 #ifdef HAS_PPC_PMC_IBM 642 case PPC_PMC_IBM: 643 attrs = ibm_common_attrs; 644 nattrs = sizeof(ibm_common_attrs) / sizeof(struct sysdev_attribute); 645 pmc_attrs = classic_pmc_attrs; 646 break; 647 #endif /* HAS_PPC_PMC_IBM */ 648 #ifdef HAS_PPC_PMC_G4 649 case PPC_PMC_G4: 650 attrs = g4_common_attrs; 651 nattrs = sizeof(g4_common_attrs) / sizeof(struct sysdev_attribute); 652 pmc_attrs = classic_pmc_attrs; 653 break; 654 #endif /* HAS_PPC_PMC_G4 */ 655 #ifdef HAS_PPC_PMC_PA6T 656 case PPC_PMC_PA6T: 657 /* PA Semi starts counting at PMC0 */ 658 attrs = pa6t_attrs; 659 nattrs = sizeof(pa6t_attrs) / sizeof(struct sysdev_attribute); 660 pmc_attrs = NULL; 661 break; 662 #endif /* HAS_PPC_PMC_PA6T */ 663 default: 664 attrs = NULL; 665 nattrs = 0; 666 pmc_attrs = NULL; 667 } 668 669 for (i = 0; i < nattrs; i++) 670 sysdev_create_file(s, &attrs[i]); 671 672 if (pmc_attrs) 673 for (i = 0; i < cur_cpu_spec->num_pmcs; i++) 674 sysdev_create_file(s, &pmc_attrs[i]); 675 676 #ifdef CONFIG_PPC64 677 if (cpu_has_feature(CPU_FTR_MMCRA)) 678 sysdev_create_file(s, &attr_mmcra); 679 680 if (cpu_has_feature(CPU_FTR_PURR)) 681 sysdev_create_file(s, &attr_purr); 682 683 if (cpu_has_feature(CPU_FTR_SPURR)) 684 sysdev_create_file(s, &attr_spurr); 685 686 if (cpu_has_feature(CPU_FTR_DSCR)) 687 sysdev_create_file(s, &attr_dscr); 688 #endif /* CONFIG_PPC64 */ 689 690 create_cache_info(s); 691 } 692 693 #ifdef CONFIG_HOTPLUG_CPU 694 static void remove_cache_info(struct sys_device *sysdev) 695 { 696 struct kobject *cache_toplevel; 697 struct cache_desc *cache_desc; 698 int cpu = sysdev->id; 699 700 cache_desc = per_cpu(cache_desc, cpu); 701 if (cache_desc != NULL) 702 kobject_put(&cache_desc->kobj); 703 704 cache_toplevel = per_cpu(cache_toplevel, cpu); 705 if (cache_toplevel != NULL) 706 kobject_put(cache_toplevel); 707 } 708 709 static void unregister_cpu_online(unsigned int cpu) 710 { 711 struct cpu *c = &per_cpu(cpu_devices, cpu); 712 struct sys_device *s = &c->sysdev; 713 struct sysdev_attribute *attrs, *pmc_attrs; 714 int i, nattrs; 715 716 BUG_ON(!c->hotpluggable); 717 718 if (!firmware_has_feature(FW_FEATURE_ISERIES) && 719 cpu_has_feature(CPU_FTR_SMT)) 720 sysdev_remove_file(s, &attr_smt_snooze_delay); 721 722 /* PMC stuff */ 723 switch (cur_cpu_spec->pmc_type) { 724 #ifdef HAS_PPC_PMC_IBM 725 case PPC_PMC_IBM: 726 attrs = ibm_common_attrs; 727 nattrs = sizeof(ibm_common_attrs) / sizeof(struct sysdev_attribute); 728 pmc_attrs = classic_pmc_attrs; 729 break; 730 #endif /* HAS_PPC_PMC_IBM */ 731 #ifdef HAS_PPC_PMC_G4 732 case PPC_PMC_G4: 733 attrs = g4_common_attrs; 734 nattrs = sizeof(g4_common_attrs) / sizeof(struct sysdev_attribute); 735 pmc_attrs = classic_pmc_attrs; 736 break; 737 #endif /* HAS_PPC_PMC_G4 */ 738 #ifdef HAS_PPC_PMC_PA6T 739 case PPC_PMC_PA6T: 740 /* PA Semi starts counting at PMC0 */ 741 attrs = pa6t_attrs; 742 nattrs = sizeof(pa6t_attrs) / sizeof(struct sysdev_attribute); 743 pmc_attrs = NULL; 744 break; 745 #endif /* HAS_PPC_PMC_PA6T */ 746 default: 747 attrs = NULL; 748 nattrs = 0; 749 pmc_attrs = NULL; 750 } 751 752 for (i = 0; i < nattrs; i++) 753 sysdev_remove_file(s, &attrs[i]); 754 755 if (pmc_attrs) 756 for (i = 0; i < cur_cpu_spec->num_pmcs; i++) 757 sysdev_remove_file(s, &pmc_attrs[i]); 758 759 #ifdef CONFIG_PPC64 760 if (cpu_has_feature(CPU_FTR_MMCRA)) 761 sysdev_remove_file(s, &attr_mmcra); 762 763 if (cpu_has_feature(CPU_FTR_PURR)) 764 sysdev_remove_file(s, &attr_purr); 765 766 if (cpu_has_feature(CPU_FTR_SPURR)) 767 sysdev_remove_file(s, &attr_spurr); 768 769 if (cpu_has_feature(CPU_FTR_DSCR)) 770 sysdev_remove_file(s, &attr_dscr); 771 #endif /* CONFIG_PPC64 */ 772 773 remove_cache_info(s); 774 } 775 #endif /* CONFIG_HOTPLUG_CPU */ 776 777 static int __cpuinit sysfs_cpu_notify(struct notifier_block *self, 778 unsigned long action, void *hcpu) 779 { 780 unsigned int cpu = (unsigned int)(long)hcpu; 781 782 switch (action) { 783 case CPU_ONLINE: 784 case CPU_ONLINE_FROZEN: 785 register_cpu_online(cpu); 786 break; 787 #ifdef CONFIG_HOTPLUG_CPU 788 case CPU_DEAD: 789 case CPU_DEAD_FROZEN: 790 unregister_cpu_online(cpu); 791 break; 792 #endif 793 } 794 return NOTIFY_OK; 795 } 796 797 static struct notifier_block __cpuinitdata sysfs_cpu_nb = { 798 .notifier_call = sysfs_cpu_notify, 799 }; 800 801 static DEFINE_MUTEX(cpu_mutex); 802 803 int cpu_add_sysdev_attr(struct sysdev_attribute *attr) 804 { 805 int cpu; 806 807 mutex_lock(&cpu_mutex); 808 809 for_each_possible_cpu(cpu) { 810 sysdev_create_file(get_cpu_sysdev(cpu), attr); 811 } 812 813 mutex_unlock(&cpu_mutex); 814 return 0; 815 } 816 EXPORT_SYMBOL_GPL(cpu_add_sysdev_attr); 817 818 int cpu_add_sysdev_attr_group(struct attribute_group *attrs) 819 { 820 int cpu; 821 struct sys_device *sysdev; 822 int ret; 823 824 mutex_lock(&cpu_mutex); 825 826 for_each_possible_cpu(cpu) { 827 sysdev = get_cpu_sysdev(cpu); 828 ret = sysfs_create_group(&sysdev->kobj, attrs); 829 WARN_ON(ret != 0); 830 } 831 832 mutex_unlock(&cpu_mutex); 833 return 0; 834 } 835 EXPORT_SYMBOL_GPL(cpu_add_sysdev_attr_group); 836 837 838 void cpu_remove_sysdev_attr(struct sysdev_attribute *attr) 839 { 840 int cpu; 841 842 mutex_lock(&cpu_mutex); 843 844 for_each_possible_cpu(cpu) { 845 sysdev_remove_file(get_cpu_sysdev(cpu), attr); 846 } 847 848 mutex_unlock(&cpu_mutex); 849 } 850 EXPORT_SYMBOL_GPL(cpu_remove_sysdev_attr); 851 852 void cpu_remove_sysdev_attr_group(struct attribute_group *attrs) 853 { 854 int cpu; 855 struct sys_device *sysdev; 856 857 mutex_lock(&cpu_mutex); 858 859 for_each_possible_cpu(cpu) { 860 sysdev = get_cpu_sysdev(cpu); 861 sysfs_remove_group(&sysdev->kobj, attrs); 862 } 863 864 mutex_unlock(&cpu_mutex); 865 } 866 EXPORT_SYMBOL_GPL(cpu_remove_sysdev_attr_group); 867 868 869 /* NUMA stuff */ 870 871 #ifdef CONFIG_NUMA 872 static void register_nodes(void) 873 { 874 int i; 875 876 for (i = 0; i < MAX_NUMNODES; i++) 877 register_one_node(i); 878 } 879 880 int sysfs_add_device_to_node(struct sys_device *dev, int nid) 881 { 882 struct node *node = &node_devices[nid]; 883 return sysfs_create_link(&node->sysdev.kobj, &dev->kobj, 884 kobject_name(&dev->kobj)); 885 } 886 EXPORT_SYMBOL_GPL(sysfs_add_device_to_node); 887 888 void sysfs_remove_device_from_node(struct sys_device *dev, int nid) 889 { 890 struct node *node = &node_devices[nid]; 891 sysfs_remove_link(&node->sysdev.kobj, kobject_name(&dev->kobj)); 892 } 893 EXPORT_SYMBOL_GPL(sysfs_remove_device_from_node); 894 895 #else 896 static void register_nodes(void) 897 { 898 return; 899 } 900 901 #endif 902 903 /* Only valid if CPU is present. */ 904 static ssize_t show_physical_id(struct sys_device *dev, 905 struct sysdev_attribute *attr, char *buf) 906 { 907 struct cpu *cpu = container_of(dev, struct cpu, sysdev); 908 909 return sprintf(buf, "%d\n", get_hard_smp_processor_id(cpu->sysdev.id)); 910 } 911 static SYSDEV_ATTR(physical_id, 0444, show_physical_id, NULL); 912 913 static int __init topology_init(void) 914 { 915 int cpu; 916 917 register_nodes(); 918 register_cpu_notifier(&sysfs_cpu_nb); 919 920 for_each_possible_cpu(cpu) { 921 struct cpu *c = &per_cpu(cpu_devices, cpu); 922 923 /* 924 * For now, we just see if the system supports making 925 * the RTAS calls for CPU hotplug. But, there may be a 926 * more comprehensive way to do this for an individual 927 * CPU. For instance, the boot cpu might never be valid 928 * for hotplugging. 929 */ 930 if (ppc_md.cpu_die) 931 c->hotpluggable = 1; 932 933 if (cpu_online(cpu) || c->hotpluggable) { 934 register_cpu(c, cpu); 935 936 sysdev_create_file(&c->sysdev, &attr_physical_id); 937 } 938 939 if (cpu_online(cpu)) 940 register_cpu_online(cpu); 941 } 942 943 return 0; 944 } 945 subsys_initcall(topology_init); 946