arch/powerpc/kernel/sysfs.c

   1 #include <linux/device.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/export.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/hvcall.h>
  16 #include <asm/prom.h>
  17 #include <asm/machdep.h>
  18 #include <asm/smp.h>
  19 #include <asm/pmc.h>
  20 #include <asm/firmware.h>
  21
  22 #include "cacheinfo.h"
  23
  24 #ifdef CONFIG_PPC64
  25 #include <asm/paca.h>
  26 #include <asm/lppaca.h>
  27 #endif
  28
  29 static DEFINE_PER_CPU(struct cpu, cpu_devices);
  30
  31 /*
  32  * SMT snooze delay stuff, 64-bit only for now
  33  */
  34
  35 #ifdef CONFIG_PPC64
  36
  37 /* Time in microseconds we delay before sleeping in the idle loop */
  38 DEFINE_PER_CPU(long, smt_snooze_delay) = { 100 };
  39
  40 static ssize_t store_smt_snooze_delay(struct device *dev,
  41                                       struct device_attribute *attr,
  42                                       const char *buf,
  43                                       size_t count)
  44 {
  45         struct cpu *cpu = container_of(dev, struct cpu, dev);
  46         ssize_t ret;
  47         long snooze;
  48
  49         ret = sscanf(buf, "%ld", &snooze);
  50         if (ret != 1)
  51                 return -EINVAL;
  52
  53         per_cpu(smt_snooze_delay, cpu->dev.id) = snooze;
  54         return count;
  55 }
  56
  57 static ssize_t show_smt_snooze_delay(struct device *dev,
  58                                      struct device_attribute *attr,
  59                                      char *buf)
  60 {
  61         struct cpu *cpu = container_of(dev, struct cpu, dev);
  62
  63         return sprintf(buf, "%ld\n", per_cpu(smt_snooze_delay, cpu->dev.id));
  64 }
  65
  66 static DEVICE_ATTR(smt_snooze_delay, 0644, show_smt_snooze_delay,
  67                    store_smt_snooze_delay);
  68
  69 static int __init setup_smt_snooze_delay(char *str)
  70 {
  71         unsigned int cpu;
  72         long snooze;
  73
  74         if (!cpu_has_feature(CPU_FTR_SMT))
  75                 return 1;
  76
  77         snooze = simple_strtol(str, NULL, 10);
  78         for_each_possible_cpu(cpu)
  79                 per_cpu(smt_snooze_delay, cpu) = snooze;
  80
  81         return 1;
  82 }
  83 __setup("smt-snooze-delay=", setup_smt_snooze_delay);
  84
  85 #endif /* CONFIG_PPC64 */
  86
  87 #ifdef CONFIG_PPC_FSL_BOOK3E
  88 #define MAX_BIT                         63
  89
  90 static u64 pw20_wt;
  91 static u64 altivec_idle_wt;
  92
  93 static unsigned int get_idle_ticks_bit(u64 ns)
  94 {
  95         u64 cycle;
  96
  97         if (ns >= 10000)
  98                 cycle = div_u64(ns + 500, 1000) * tb_ticks_per_usec;
  99         else
 100                 cycle = div_u64(ns * tb_ticks_per_usec, 1000);
 101
 102         if (!cycle)
 103                 return 0;
 104
 105         return ilog2(cycle);
 106 }
 107
 108 static void do_show_pwrmgtcr0(void *val)
 109 {
 110         u32 *value = val;
 111
 112         *value = mfspr(SPRN_PWRMGTCR0);
 113 }
 114
 115 static ssize_t show_pw20_state(struct device *dev,
 116                                 struct device_attribute *attr, char *buf)
 117 {
 118         u32 value;
 119         unsigned int cpu = dev->id;
 120
 121         smp_call_function_single(cpu, do_show_pwrmgtcr0, &value, 1);
 122
 123         value &= PWRMGTCR0_PW20_WAIT;
 124
 125         return sprintf(buf, "%u\n", value ? 1 : 0);
 126 }
 127
 128 static void do_store_pw20_state(void *val)
 129 {
 130         u32 *value = val;
 131         u32 pw20_state;
 132
 133         pw20_state = mfspr(SPRN_PWRMGTCR0);
 134
 135         if (*value)
 136                 pw20_state |= PWRMGTCR0_PW20_WAIT;
 137         else
 138                 pw20_state &= ~PWRMGTCR0_PW20_WAIT;
 139
 140         mtspr(SPRN_PWRMGTCR0, pw20_state);
 141 }
 142
 143 static ssize_t store_pw20_state(struct device *dev,
 144                                 struct device_attribute *attr,
 145                                 const char *buf, size_t count)
 146 {
 147         u32 value;
 148         unsigned int cpu = dev->id;
 149
 150         if (kstrtou32(buf, 0, &value))
 151                 return -EINVAL;
 152
 153         if (value > 1)
 154                 return -EINVAL;
 155
 156         smp_call_function_single(cpu, do_store_pw20_state, &value, 1);
 157
 158         return count;
 159 }
 160
 161 static ssize_t show_pw20_wait_time(struct device *dev,
 162                                 struct device_attribute *attr, char *buf)
 163 {
 164         u32 value;
 165         u64 tb_cycle = 1;
 166         u64 time;
 167
 168         unsigned int cpu = dev->id;
 169
 170         if (!pw20_wt) {
 171                 smp_call_function_single(cpu, do_show_pwrmgtcr0, &value, 1);
 172                 value = (value & PWRMGTCR0_PW20_ENT) >>
 173                                         PWRMGTCR0_PW20_ENT_SHIFT;
 174
 175                 tb_cycle = (tb_cycle << (MAX_BIT - value + 1));
 176                 /* convert ms to ns */
 177                 if (tb_ticks_per_usec > 1000) {
 178                         time = div_u64(tb_cycle, tb_ticks_per_usec / 1000);
 179                 } else {
 180                         u32 rem_us;
 181
 182                         time = div_u64_rem(tb_cycle, tb_ticks_per_usec,
 183                                                 &rem_us);
 184                         time = time * 1000 + rem_us * 1000 / tb_ticks_per_usec;
 185                 }
 186         } else {
 187                 time = pw20_wt;
 188         }
 189
 190         return sprintf(buf, "%llu\n", time > 0 ? time : 0);
 191 }
 192
 193 static void set_pw20_wait_entry_bit(void *val)
 194 {
 195         u32 *value = val;
 196         u32 pw20_idle;
 197
 198         pw20_idle = mfspr(SPRN_PWRMGTCR0);
 199
 200         /* Set Automatic PW20 Core Idle Count */
 201         /* clear count */
 202         pw20_idle &= ~PWRMGTCR0_PW20_ENT;
 203
 204         /* set count */
 205         pw20_idle |= ((MAX_BIT - *value) << PWRMGTCR0_PW20_ENT_SHIFT);
 206
 207         mtspr(SPRN_PWRMGTCR0, pw20_idle);
 208 }
 209
 210 static ssize_t store_pw20_wait_time(struct device *dev,
 211                                 struct device_attribute *attr,
 212                                 const char *buf, size_t count)
 213 {
 214         u32 entry_bit;
 215         u64 value;
 216
 217         unsigned int cpu = dev->id;
 218
 219         if (kstrtou64(buf, 0, &value))
 220                 return -EINVAL;
 221
 222         if (!value)
 223                 return -EINVAL;
 224
 225         entry_bit = get_idle_ticks_bit(value);
 226         if (entry_bit > MAX_BIT)
 227                 return -EINVAL;
 228
 229         pw20_wt = value;
 230
 231         smp_call_function_single(cpu, set_pw20_wait_entry_bit,
 232                                 &entry_bit, 1);
 233
 234         return count;
 235 }
 236
 237 static ssize_t show_altivec_idle(struct device *dev,
 238                                 struct device_attribute *attr, char *buf)
 239 {
 240         u32 value;
 241         unsigned int cpu = dev->id;
 242
 243         smp_call_function_single(cpu, do_show_pwrmgtcr0, &value, 1);
 244
 245         value &= PWRMGTCR0_AV_IDLE_PD_EN;
 246
 247         return sprintf(buf, "%u\n", value ? 1 : 0);
 248 }
 249
 250 static void do_store_altivec_idle(void *val)
 251 {
 252         u32 *value = val;
 253         u32 altivec_idle;
 254
 255         altivec_idle = mfspr(SPRN_PWRMGTCR0);
 256
 257         if (*value)
 258                 altivec_idle |= PWRMGTCR0_AV_IDLE_PD_EN;
 259         else
 260                 altivec_idle &= ~PWRMGTCR0_AV_IDLE_PD_EN;
 261
 262         mtspr(SPRN_PWRMGTCR0, altivec_idle);
 263 }
 264
 265 static ssize_t store_altivec_idle(struct device *dev,
 266                                 struct device_attribute *attr,
 267                                 const char *buf, size_t count)
 268 {
 269         u32 value;
 270         unsigned int cpu = dev->id;
 271
 272         if (kstrtou32(buf, 0, &value))
 273                 return -EINVAL;
 274
 275         if (value > 1)
 276                 return -EINVAL;
 277
 278         smp_call_function_single(cpu, do_store_altivec_idle, &value, 1);
 279
 280         return count;
 281 }
 282
 283 static ssize_t show_altivec_idle_wait_time(struct device *dev,
 284                                 struct device_attribute *attr, char *buf)
 285 {
 286         u32 value;
 287         u64 tb_cycle = 1;
 288         u64 time;
 289
 290         unsigned int cpu = dev->id;
 291
 292         if (!altivec_idle_wt) {
 293                 smp_call_function_single(cpu, do_show_pwrmgtcr0, &value, 1);
 294                 value = (value & PWRMGTCR0_AV_IDLE_CNT) >>
 295                                         PWRMGTCR0_AV_IDLE_CNT_SHIFT;
 296
 297                 tb_cycle = (tb_cycle << (MAX_BIT - value + 1));
 298                 /* convert ms to ns */
 299                 if (tb_ticks_per_usec > 1000) {
 300                         time = div_u64(tb_cycle, tb_ticks_per_usec / 1000);
 301                 } else {
 302                         u32 rem_us;
 303
 304                         time = div_u64_rem(tb_cycle, tb_ticks_per_usec,
 305                                                 &rem_us);
 306                         time = time * 1000 + rem_us * 1000 / tb_ticks_per_usec;
 307                 }
 308         } else {
 309                 time = altivec_idle_wt;
 310         }
 311
 312         return sprintf(buf, "%llu\n", time > 0 ? time : 0);
 313 }
 314
 315 static void set_altivec_idle_wait_entry_bit(void *val)
 316 {
 317         u32 *value = val;
 318         u32 altivec_idle;
 319
 320         altivec_idle = mfspr(SPRN_PWRMGTCR0);
 321
 322         /* Set Automatic AltiVec Idle Count */
 323         /* clear count */
 324         altivec_idle &= ~PWRMGTCR0_AV_IDLE_CNT;
 325
 326         /* set count */
 327         altivec_idle |= ((MAX_BIT - *value) << PWRMGTCR0_AV_IDLE_CNT_SHIFT);
 328
 329         mtspr(SPRN_PWRMGTCR0, altivec_idle);
 330 }
 331
 332 static ssize_t store_altivec_idle_wait_time(struct device *dev,
 333                                 struct device_attribute *attr,
 334                                 const char *buf, size_t count)
 335 {
 336         u32 entry_bit;
 337         u64 value;
 338
 339         unsigned int cpu = dev->id;
 340
 341         if (kstrtou64(buf, 0, &value))
 342                 return -EINVAL;
 343
 344         if (!value)
 345                 return -EINVAL;
 346
 347         entry_bit = get_idle_ticks_bit(value);
 348         if (entry_bit > MAX_BIT)
 349                 return -EINVAL;
 350
 351         altivec_idle_wt = value;
 352
 353         smp_call_function_single(cpu, set_altivec_idle_wait_entry_bit,
 354                                 &entry_bit, 1);
 355
 356         return count;
 357 }
 358
 359 /*
 360  * Enable/Disable interface:
 361  * 0, disable. 1, enable.
 362  */
 363 static DEVICE_ATTR(pw20_state, 0600, show_pw20_state, store_pw20_state);
 364 static DEVICE_ATTR(altivec_idle, 0600, show_altivec_idle, store_altivec_idle);
 365
 366 /*
 367  * Set wait time interface:(Nanosecond)
 368  * Example: Base on TBfreq is 41MHZ.
 369  * 1~48(ns): TB[63]
 370  * 49~97(ns): TB[62]
 371  * 98~195(ns): TB[61]
 372  * 196~390(ns): TB[60]
 373  * 391~780(ns): TB[59]
 374  * 781~1560(ns): TB[58]
 375  * ...
 376  */
 377 static DEVICE_ATTR(pw20_wait_time, 0600,
 378                         show_pw20_wait_time,
 379                         store_pw20_wait_time);
 380 static DEVICE_ATTR(altivec_idle_wait_time, 0600,
 381                         show_altivec_idle_wait_time,
 382                         store_altivec_idle_wait_time);
 383 #endif
 384
 385 /*
 386  * Enabling PMCs will slow partition context switch times so we only do
 387  * it the first time we write to the PMCs.
 388  */
 389
 390 static DEFINE_PER_CPU(char, pmcs_enabled);
 391
 392 void ppc_enable_pmcs(void)
 393 {
 394         ppc_set_pmu_inuse(1);
 395
 396         /* Only need to enable them once */
 397         if (__this_cpu_read(pmcs_enabled))
 398                 return;
 399
 400         __this_cpu_write(pmcs_enabled, 1);
 401
 402         if (ppc_md.enable_pmcs)
 403                 ppc_md.enable_pmcs();
 404 }
 405 EXPORT_SYMBOL(ppc_enable_pmcs);
 406
 407 #define __SYSFS_SPRSETUP_READ_WRITE(NAME, ADDRESS, EXTRA) \
 408 static void read_##NAME(void *val) \
 409 { \
 410         *(unsigned long *)val = mfspr(ADDRESS); \
 411 } \
 412 static void write_##NAME(void *val) \
 413 { \
 414         EXTRA; \
 415         mtspr(ADDRESS, *(unsigned long *)val);  \
 416 }
 417
 418 #define __SYSFS_SPRSETUP_SHOW_STORE(NAME) \
 419 static ssize_t show_##NAME(struct device *dev, \
 420                         struct device_attribute *attr, \
 421                         char *buf) \
 422 { \
 423         struct cpu *cpu = container_of(dev, struct cpu, dev); \
 424         unsigned long val; \
 425         smp_call_function_single(cpu->dev.id, read_##NAME, &val, 1);    \
 426         return sprintf(buf, "%lx\n", val); \
 427 } \
 428 static ssize_t __used \
 429         store_##NAME(struct device *dev, struct device_attribute *attr, \
 430                         const char *buf, size_t count) \
 431 { \
 432         struct cpu *cpu = container_of(dev, struct cpu, dev); \
 433         unsigned long val; \
 434         int ret = sscanf(buf, "%lx", &val); \
 435         if (ret != 1) \
 436                 return -EINVAL; \
 437         smp_call_function_single(cpu->dev.id, write_##NAME, &val, 1); \
 438         return count; \
 439 }
 440
 441 #define SYSFS_PMCSETUP(NAME, ADDRESS) \
 442         __SYSFS_SPRSETUP_READ_WRITE(NAME, ADDRESS, ppc_enable_pmcs()) \
 443         __SYSFS_SPRSETUP_SHOW_STORE(NAME)
 444 #define SYSFS_SPRSETUP(NAME, ADDRESS) \
 445         __SYSFS_SPRSETUP_READ_WRITE(NAME, ADDRESS, ) \
 446         __SYSFS_SPRSETUP_SHOW_STORE(NAME)
 447
 448 #define SYSFS_SPRSETUP_SHOW_STORE(NAME) \
 449         __SYSFS_SPRSETUP_SHOW_STORE(NAME)
 450
 451 /* Let's define all possible registers, we'll only hook up the ones
 452  * that are implemented on the current processor
 453  */
 454
 455 #if defined(CONFIG_PPC64)
 456 #define HAS_PPC_PMC_CLASSIC     1
 457 #define HAS_PPC_PMC_IBM         1
 458 #define HAS_PPC_PMC_PA6T        1
 459 #elif defined(CONFIG_6xx)
 460 #define HAS_PPC_PMC_CLASSIC     1
 461 #define HAS_PPC_PMC_IBM         1
 462 #define HAS_PPC_PMC_G4          1
 463 #endif
 464
 465
 466 #ifdef HAS_PPC_PMC_CLASSIC
 467 SYSFS_PMCSETUP(mmcr0, SPRN_MMCR0);
 468 SYSFS_PMCSETUP(mmcr1, SPRN_MMCR1);
 469 SYSFS_PMCSETUP(pmc1, SPRN_PMC1);
 470 SYSFS_PMCSETUP(pmc2, SPRN_PMC2);
 471 SYSFS_PMCSETUP(pmc3, SPRN_PMC3);
 472 SYSFS_PMCSETUP(pmc4, SPRN_PMC4);
 473 SYSFS_PMCSETUP(pmc5, SPRN_PMC5);
 474 SYSFS_PMCSETUP(pmc6, SPRN_PMC6);
 475
 476 #ifdef HAS_PPC_PMC_G4
 477 SYSFS_PMCSETUP(mmcr2, SPRN_MMCR2);
 478 #endif
 479
 480 #ifdef CONFIG_PPC64
 481 SYSFS_PMCSETUP(pmc7, SPRN_PMC7);
 482 SYSFS_PMCSETUP(pmc8, SPRN_PMC8);
 483
 484 SYSFS_PMCSETUP(mmcra, SPRN_MMCRA);
 485 SYSFS_SPRSETUP(purr, SPRN_PURR);
 486 SYSFS_SPRSETUP(spurr, SPRN_SPURR);
 487 SYSFS_SPRSETUP(pir, SPRN_PIR);
 488
 489 /*
 490   Lets only enable read for phyp resources and
 491   enable write when needed with a separate function.
 492   Lets be conservative and default to pseries.
 493 */
 494 static DEVICE_ATTR(mmcra, 0600, show_mmcra, store_mmcra);
 495 static DEVICE_ATTR(spurr, 0400, show_spurr, NULL);
 496 static DEVICE_ATTR(purr, 0400, show_purr, store_purr);
 497 static DEVICE_ATTR(pir, 0400, show_pir, NULL);
 498
 499 static unsigned long dscr_default;
 500
 501 static void read_dscr(void *val)
 502 {
 503         *(unsigned long *)val = get_paca()->dscr_default;
 504 }
 505
 506 static void write_dscr(void *val)
 507 {
 508         get_paca()->dscr_default = *(unsigned long *)val;
 509         if (!current->thread.dscr_inherit) {
 510                 current->thread.dscr = *(unsigned long *)val;
 511                 mtspr(SPRN_DSCR, *(unsigned long *)val);
 512         }
 513 }
 514
 515 SYSFS_SPRSETUP_SHOW_STORE(dscr);
 516 static DEVICE_ATTR(dscr, 0600, show_dscr, store_dscr);
 517
 518 static void add_write_permission_dev_attr(struct device_attribute *attr)
 519 {
 520         attr->attr.mode |= 0200;
 521 }
 522
 523 static ssize_t show_dscr_default(struct device *dev,
 524                 struct device_attribute *attr, char *buf)
 525 {
 526         return sprintf(buf, "%lx\n", dscr_default);
 527 }
 528
 529 static ssize_t __used store_dscr_default(struct device *dev,
 530                 struct device_attribute *attr, const char *buf,
 531                 size_t count)
 532 {
 533         unsigned long val;
 534         int ret = 0;
 535
 536         ret = sscanf(buf, "%lx", &val);
 537         if (ret != 1)
 538                 return -EINVAL;
 539         dscr_default = val;
 540
 541         on_each_cpu(write_dscr, &val, 1);
 542
 543         return count;
 544 }
 545
 546 static DEVICE_ATTR(dscr_default, 0600,
 547                 show_dscr_default, store_dscr_default);
 548
 549 static void sysfs_create_dscr_default(void)
 550 {
 551         int err = 0;
 552         if (cpu_has_feature(CPU_FTR_DSCR))
 553                 err = device_create_file(cpu_subsys.dev_root, &dev_attr_dscr_default);
 554 }
 555 #endif /* CONFIG_PPC64 */
 556
 557 #ifdef HAS_PPC_PMC_PA6T
 558 SYSFS_PMCSETUP(pa6t_pmc0, SPRN_PA6T_PMC0);
 559 SYSFS_PMCSETUP(pa6t_pmc1, SPRN_PA6T_PMC1);
 560 SYSFS_PMCSETUP(pa6t_pmc2, SPRN_PA6T_PMC2);
 561 SYSFS_PMCSETUP(pa6t_pmc3, SPRN_PA6T_PMC3);
 562 SYSFS_PMCSETUP(pa6t_pmc4, SPRN_PA6T_PMC4);
 563 SYSFS_PMCSETUP(pa6t_pmc5, SPRN_PA6T_PMC5);
 564 #ifdef CONFIG_DEBUG_KERNEL
 565 SYSFS_SPRSETUP(hid0, SPRN_HID0);
 566 SYSFS_SPRSETUP(hid1, SPRN_HID1);
 567 SYSFS_SPRSETUP(hid4, SPRN_HID4);
 568 SYSFS_SPRSETUP(hid5, SPRN_HID5);
 569 SYSFS_SPRSETUP(ima0, SPRN_PA6T_IMA0);
 570 SYSFS_SPRSETUP(ima1, SPRN_PA6T_IMA1);
 571 SYSFS_SPRSETUP(ima2, SPRN_PA6T_IMA2);
 572 SYSFS_SPRSETUP(ima3, SPRN_PA6T_IMA3);
 573 SYSFS_SPRSETUP(ima4, SPRN_PA6T_IMA4);
 574 SYSFS_SPRSETUP(ima5, SPRN_PA6T_IMA5);
 575 SYSFS_SPRSETUP(ima6, SPRN_PA6T_IMA6);
 576 SYSFS_SPRSETUP(ima7, SPRN_PA6T_IMA7);
 577 SYSFS_SPRSETUP(ima8, SPRN_PA6T_IMA8);
 578 SYSFS_SPRSETUP(ima9, SPRN_PA6T_IMA9);
 579 SYSFS_SPRSETUP(imaat, SPRN_PA6T_IMAAT);
 580 SYSFS_SPRSETUP(btcr, SPRN_PA6T_BTCR);
 581 SYSFS_SPRSETUP(pccr, SPRN_PA6T_PCCR);
 582 SYSFS_SPRSETUP(rpccr, SPRN_PA6T_RPCCR);
 583 SYSFS_SPRSETUP(der, SPRN_PA6T_DER);
 584 SYSFS_SPRSETUP(mer, SPRN_PA6T_MER);
 585 SYSFS_SPRSETUP(ber, SPRN_PA6T_BER);
 586 SYSFS_SPRSETUP(ier, SPRN_PA6T_IER);
 587 SYSFS_SPRSETUP(sier, SPRN_PA6T_SIER);
 588 SYSFS_SPRSETUP(siar, SPRN_PA6T_SIAR);
 589 SYSFS_SPRSETUP(tsr0, SPRN_PA6T_TSR0);
 590 SYSFS_SPRSETUP(tsr1, SPRN_PA6T_TSR1);
 591 SYSFS_SPRSETUP(tsr2, SPRN_PA6T_TSR2);
 592 SYSFS_SPRSETUP(tsr3, SPRN_PA6T_TSR3);
 593 #endif /* CONFIG_DEBUG_KERNEL */
 594 #endif /* HAS_PPC_PMC_PA6T */
 595
 596 #ifdef HAS_PPC_PMC_IBM
 597 static struct device_attribute ibm_common_attrs[] = {
 598         __ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0),
 599         __ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1),
 600 };
 601 #endif /* HAS_PPC_PMC_G4 */
 602
 603 #ifdef HAS_PPC_PMC_G4
 604 static struct device_attribute g4_common_attrs[] = {
 605         __ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0),
 606         __ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1),
 607         __ATTR(mmcr2, 0600, show_mmcr2, store_mmcr2),
 608 };
 609 #endif /* HAS_PPC_PMC_G4 */
 610
 611 static struct device_attribute classic_pmc_attrs[] = {
 612         __ATTR(pmc1, 0600, show_pmc1, store_pmc1),
 613         __ATTR(pmc2, 0600, show_pmc2, store_pmc2),
 614         __ATTR(pmc3, 0600, show_pmc3, store_pmc3),
 615         __ATTR(pmc4, 0600, show_pmc4, store_pmc4),
 616         __ATTR(pmc5, 0600, show_pmc5, store_pmc5),
 617         __ATTR(pmc6, 0600, show_pmc6, store_pmc6),
 618 #ifdef CONFIG_PPC64
 619         __ATTR(pmc7, 0600, show_pmc7, store_pmc7),
 620         __ATTR(pmc8, 0600, show_pmc8, store_pmc8),
 621 #endif
 622 };
 623
 624 #ifdef HAS_PPC_PMC_PA6T
 625 static struct device_attribute pa6t_attrs[] = {
 626         __ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0),
 627         __ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1),
 628         __ATTR(pmc0, 0600, show_pa6t_pmc0, store_pa6t_pmc0),
 629         __ATTR(pmc1, 0600, show_pa6t_pmc1, store_pa6t_pmc1),
 630         __ATTR(pmc2, 0600, show_pa6t_pmc2, store_pa6t_pmc2),
 631         __ATTR(pmc3, 0600, show_pa6t_pmc3, store_pa6t_pmc3),
 632         __ATTR(pmc4, 0600, show_pa6t_pmc4, store_pa6t_pmc4),
 633         __ATTR(pmc5, 0600, show_pa6t_pmc5, store_pa6t_pmc5),
 634 #ifdef CONFIG_DEBUG_KERNEL
 635         __ATTR(hid0, 0600, show_hid0, store_hid0),
 636         __ATTR(hid1, 0600, show_hid1, store_hid1),
 637         __ATTR(hid4, 0600, show_hid4, store_hid4),
 638         __ATTR(hid5, 0600, show_hid5, store_hid5),
 639         __ATTR(ima0, 0600, show_ima0, store_ima0),
 640         __ATTR(ima1, 0600, show_ima1, store_ima1),
 641         __ATTR(ima2, 0600, show_ima2, store_ima2),
 642         __ATTR(ima3, 0600, show_ima3, store_ima3),
 643         __ATTR(ima4, 0600, show_ima4, store_ima4),
 644         __ATTR(ima5, 0600, show_ima5, store_ima5),
 645         __ATTR(ima6, 0600, show_ima6, store_ima6),
 646         __ATTR(ima7, 0600, show_ima7, store_ima7),
 647         __ATTR(ima8, 0600, show_ima8, store_ima8),
 648         __ATTR(ima9, 0600, show_ima9, store_ima9),
 649         __ATTR(imaat, 0600, show_imaat, store_imaat),
 650         __ATTR(btcr, 0600, show_btcr, store_btcr),
 651         __ATTR(pccr, 0600, show_pccr, store_pccr),
 652         __ATTR(rpccr, 0600, show_rpccr, store_rpccr),
 653         __ATTR(der, 0600, show_der, store_der),
 654         __ATTR(mer, 0600, show_mer, store_mer),
 655         __ATTR(ber, 0600, show_ber, store_ber),
 656         __ATTR(ier, 0600, show_ier, store_ier),
 657         __ATTR(sier, 0600, show_sier, store_sier),
 658         __ATTR(siar, 0600, show_siar, store_siar),
 659         __ATTR(tsr0, 0600, show_tsr0, store_tsr0),
 660         __ATTR(tsr1, 0600, show_tsr1, store_tsr1),
 661         __ATTR(tsr2, 0600, show_tsr2, store_tsr2),
 662         __ATTR(tsr3, 0600, show_tsr3, store_tsr3),
 663 #endif /* CONFIG_DEBUG_KERNEL */
 664 };
 665 #endif /* HAS_PPC_PMC_PA6T */
 666 #endif /* HAS_PPC_PMC_CLASSIC */
 667
 668 static void register_cpu_online(unsigned int cpu)
 669 {
 670         struct cpu *c = &per_cpu(cpu_devices, cpu);
 671         struct device *s = &c->dev;
 672         struct device_attribute *attrs, *pmc_attrs;
 673         int i, nattrs;
 674
 675 #ifdef CONFIG_PPC64
 676         if (cpu_has_feature(CPU_FTR_SMT))
 677                 device_create_file(s, &dev_attr_smt_snooze_delay);
 678 #endif
 679
 680         /* PMC stuff */
 681         switch (cur_cpu_spec->pmc_type) {
 682 #ifdef HAS_PPC_PMC_IBM
 683         case PPC_PMC_IBM:
 684                 attrs = ibm_common_attrs;
 685                 nattrs = sizeof(ibm_common_attrs) / sizeof(struct device_attribute);
 686                 pmc_attrs = classic_pmc_attrs;
 687                 break;
 688 #endif /* HAS_PPC_PMC_IBM */
 689 #ifdef HAS_PPC_PMC_G4
 690         case PPC_PMC_G4:
 691                 attrs = g4_common_attrs;
 692                 nattrs = sizeof(g4_common_attrs) / sizeof(struct device_attribute);
 693                 pmc_attrs = classic_pmc_attrs;
 694                 break;
 695 #endif /* HAS_PPC_PMC_G4 */
 696 #ifdef HAS_PPC_PMC_PA6T
 697         case PPC_PMC_PA6T:
 698                 /* PA Semi starts counting at PMC0 */
 699                 attrs = pa6t_attrs;
 700                 nattrs = sizeof(pa6t_attrs) / sizeof(struct device_attribute);
 701                 pmc_attrs = NULL;
 702                 break;
 703 #endif /* HAS_PPC_PMC_PA6T */
 704         default:
 705                 attrs = NULL;
 706                 nattrs = 0;
 707                 pmc_attrs = NULL;
 708         }
 709
 710         for (i = 0; i < nattrs; i++)
 711                 device_create_file(s, &attrs[i]);
 712
 713         if (pmc_attrs)
 714                 for (i = 0; i < cur_cpu_spec->num_pmcs; i++)
 715                         device_create_file(s, &pmc_attrs[i]);
 716
 717 #ifdef CONFIG_PPC64
 718         if (cpu_has_feature(CPU_FTR_MMCRA))
 719                 device_create_file(s, &dev_attr_mmcra);
 720
 721         if (cpu_has_feature(CPU_FTR_PURR)) {
 722                 if (!firmware_has_feature(FW_FEATURE_LPAR))
 723                         add_write_permission_dev_attr(&dev_attr_purr);
 724                 device_create_file(s, &dev_attr_purr);
 725         }
 726
 727         if (cpu_has_feature(CPU_FTR_SPURR))
 728                 device_create_file(s, &dev_attr_spurr);
 729
 730         if (cpu_has_feature(CPU_FTR_DSCR))
 731                 device_create_file(s, &dev_attr_dscr);
 732
 733         if (cpu_has_feature(CPU_FTR_PPCAS_ARCH_V2))
 734                 device_create_file(s, &dev_attr_pir);
 735 #endif /* CONFIG_PPC64 */
 736
 737 #ifdef CONFIG_PPC_FSL_BOOK3E
 738         if (PVR_VER(cur_cpu_spec->pvr_value) == PVR_VER_E6500) {
 739                 device_create_file(s, &dev_attr_pw20_state);
 740                 device_create_file(s, &dev_attr_pw20_wait_time);
 741
 742                 device_create_file(s, &dev_attr_altivec_idle);
 743                 device_create_file(s, &dev_attr_altivec_idle_wait_time);
 744         }
 745 #endif
 746         cacheinfo_cpu_online(cpu);
 747 }
 748
 749 #ifdef CONFIG_HOTPLUG_CPU
 750 static void unregister_cpu_online(unsigned int cpu)
 751 {
 752         struct cpu *c = &per_cpu(cpu_devices, cpu);
 753         struct device *s = &c->dev;
 754         struct device_attribute *attrs, *pmc_attrs;
 755         int i, nattrs;
 756
 757         BUG_ON(!c->hotpluggable);
 758
 759 #ifdef CONFIG_PPC64
 760         if (cpu_has_feature(CPU_FTR_SMT))
 761                 device_remove_file(s, &dev_attr_smt_snooze_delay);
 762 #endif
 763
 764         /* PMC stuff */
 765         switch (cur_cpu_spec->pmc_type) {
 766 #ifdef HAS_PPC_PMC_IBM
 767         case PPC_PMC_IBM:
 768                 attrs = ibm_common_attrs;
 769                 nattrs = sizeof(ibm_common_attrs) / sizeof(struct device_attribute);
 770                 pmc_attrs = classic_pmc_attrs;
 771                 break;
 772 #endif /* HAS_PPC_PMC_IBM */
 773 #ifdef HAS_PPC_PMC_G4
 774         case PPC_PMC_G4:
 775                 attrs = g4_common_attrs;
 776                 nattrs = sizeof(g4_common_attrs) / sizeof(struct device_attribute);
 777                 pmc_attrs = classic_pmc_attrs;
 778                 break;
 779 #endif /* HAS_PPC_PMC_G4 */
 780 #ifdef HAS_PPC_PMC_PA6T
 781         case PPC_PMC_PA6T:
 782                 /* PA Semi starts counting at PMC0 */
 783                 attrs = pa6t_attrs;
 784                 nattrs = sizeof(pa6t_attrs) / sizeof(struct device_attribute);
 785                 pmc_attrs = NULL;
 786                 break;
 787 #endif /* HAS_PPC_PMC_PA6T */
 788         default:
 789                 attrs = NULL;
 790                 nattrs = 0;
 791                 pmc_attrs = NULL;
 792         }
 793
 794         for (i = 0; i < nattrs; i++)
 795                 device_remove_file(s, &attrs[i]);
 796
 797         if (pmc_attrs)
 798                 for (i = 0; i < cur_cpu_spec->num_pmcs; i++)
 799                         device_remove_file(s, &pmc_attrs[i]);
 800
 801 #ifdef CONFIG_PPC64
 802         if (cpu_has_feature(CPU_FTR_MMCRA))
 803                 device_remove_file(s, &dev_attr_mmcra);
 804
 805         if (cpu_has_feature(CPU_FTR_PURR))
 806                 device_remove_file(s, &dev_attr_purr);
 807
 808         if (cpu_has_feature(CPU_FTR_SPURR))
 809                 device_remove_file(s, &dev_attr_spurr);
 810
 811         if (cpu_has_feature(CPU_FTR_DSCR))
 812                 device_remove_file(s, &dev_attr_dscr);
 813
 814         if (cpu_has_feature(CPU_FTR_PPCAS_ARCH_V2))
 815                 device_remove_file(s, &dev_attr_pir);
 816 #endif /* CONFIG_PPC64 */
 817
 818 #ifdef CONFIG_PPC_FSL_BOOK3E
 819         if (PVR_VER(cur_cpu_spec->pvr_value) == PVR_VER_E6500) {
 820                 device_remove_file(s, &dev_attr_pw20_state);
 821                 device_remove_file(s, &dev_attr_pw20_wait_time);
 822
 823                 device_remove_file(s, &dev_attr_altivec_idle);
 824                 device_remove_file(s, &dev_attr_altivec_idle_wait_time);
 825         }
 826 #endif
 827         cacheinfo_cpu_offline(cpu);
 828 }
 829
 830 #ifdef CONFIG_ARCH_CPU_PROBE_RELEASE
 831 ssize_t arch_cpu_probe(const char *buf, size_t count)
 832 {
 833         if (ppc_md.cpu_probe)
 834                 return ppc_md.cpu_probe(buf, count);
 835
 836         return -EINVAL;
 837 }
 838
 839 ssize_t arch_cpu_release(const char *buf, size_t count)
 840 {
 841         if (ppc_md.cpu_release)
 842                 return ppc_md.cpu_release(buf, count);
 843
 844         return -EINVAL;
 845 }
 846 #endif /* CONFIG_ARCH_CPU_PROBE_RELEASE */
 847
 848 #endif /* CONFIG_HOTPLUG_CPU */
 849
 850 static int sysfs_cpu_notify(struct notifier_block *self,
 851                                       unsigned long action, void *hcpu)
 852 {
 853         unsigned int cpu = (unsigned int)(long)hcpu;
 854
 855         switch (action) {
 856         case CPU_ONLINE:
 857         case CPU_ONLINE_FROZEN:
 858                 register_cpu_online(cpu);
 859                 break;
 860 #ifdef CONFIG_HOTPLUG_CPU
 861         case CPU_DEAD:
 862         case CPU_DEAD_FROZEN:
 863                 unregister_cpu_online(cpu);
 864                 break;
 865 #endif
 866         }
 867         return NOTIFY_OK;
 868 }
 869
 870 static struct notifier_block sysfs_cpu_nb = {
 871         .notifier_call  = sysfs_cpu_notify,
 872 };
 873
 874 static DEFINE_MUTEX(cpu_mutex);
 875
 876 int cpu_add_dev_attr(struct device_attribute *attr)
 877 {
 878         int cpu;
 879
 880         mutex_lock(&cpu_mutex);
 881
 882         for_each_possible_cpu(cpu) {
 883                 device_create_file(get_cpu_device(cpu), attr);
 884         }
 885
 886         mutex_unlock(&cpu_mutex);
 887         return 0;
 888 }
 889 EXPORT_SYMBOL_GPL(cpu_add_dev_attr);
 890
 891 int cpu_add_dev_attr_group(struct attribute_group *attrs)
 892 {
 893         int cpu;
 894         struct device *dev;
 895         int ret;
 896
 897         mutex_lock(&cpu_mutex);
 898
 899         for_each_possible_cpu(cpu) {
 900                 dev = get_cpu_device(cpu);
 901                 ret = sysfs_create_group(&dev->kobj, attrs);
 902                 WARN_ON(ret != 0);
 903         }
 904
 905         mutex_unlock(&cpu_mutex);
 906         return 0;
 907 }
 908 EXPORT_SYMBOL_GPL(cpu_add_dev_attr_group);
 909
 910
 911 void cpu_remove_dev_attr(struct device_attribute *attr)
 912 {
 913         int cpu;
 914
 915         mutex_lock(&cpu_mutex);
 916
 917         for_each_possible_cpu(cpu) {
 918                 device_remove_file(get_cpu_device(cpu), attr);
 919         }
 920
 921         mutex_unlock(&cpu_mutex);
 922 }
 923 EXPORT_SYMBOL_GPL(cpu_remove_dev_attr);
 924
 925 void cpu_remove_dev_attr_group(struct attribute_group *attrs)
 926 {
 927         int cpu;
 928         struct device *dev;
 929
 930         mutex_lock(&cpu_mutex);
 931
 932         for_each_possible_cpu(cpu) {
 933                 dev = get_cpu_device(cpu);
 934                 sysfs_remove_group(&dev->kobj, attrs);
 935         }
 936
 937         mutex_unlock(&cpu_mutex);
 938 }
 939 EXPORT_SYMBOL_GPL(cpu_remove_dev_attr_group);
 940
 941
 942 /* NUMA stuff */
 943
 944 #ifdef CONFIG_NUMA
 945 static void register_nodes(void)
 946 {
 947         int i;
 948
 949         for (i = 0; i < MAX_NUMNODES; i++)
 950                 register_one_node(i);
 951 }
 952
 953 int sysfs_add_device_to_node(struct device *dev, int nid)
 954 {
 955         struct node *node = node_devices[nid];
 956         return sysfs_create_link(&node->dev.kobj, &dev->kobj,
 957                         kobject_name(&dev->kobj));
 958 }
 959 EXPORT_SYMBOL_GPL(sysfs_add_device_to_node);
 960
 961 void sysfs_remove_device_from_node(struct device *dev, int nid)
 962 {
 963         struct node *node = node_devices[nid];
 964         sysfs_remove_link(&node->dev.kobj, kobject_name(&dev->kobj));
 965 }
 966 EXPORT_SYMBOL_GPL(sysfs_remove_device_from_node);
 967
 968 #else
 969 static void register_nodes(void)
 970 {
 971         return;
 972 }
 973
 974 #endif
 975
 976 /* Only valid if CPU is present. */
 977 static ssize_t show_physical_id(struct device *dev,
 978                                 struct device_attribute *attr, char *buf)
 979 {
 980         struct cpu *cpu = container_of(dev, struct cpu, dev);
 981
 982         return sprintf(buf, "%d\n", get_hard_smp_processor_id(cpu->dev.id));
 983 }
 984 static DEVICE_ATTR(physical_id, 0444, show_physical_id, NULL);
 985
 986 static int __init topology_init(void)
 987 {
 988         int cpu;
 989
 990         register_nodes();
 991
 992         cpu_notifier_register_begin();
 993
 994         for_each_possible_cpu(cpu) {
 995                 struct cpu *c = &per_cpu(cpu_devices, cpu);
 996
 997                 /*
 998                  * For now, we just see if the system supports making
 999                  * the RTAS calls for CPU hotplug.  But, there may be a
1000                  * more comprehensive way to do this for an individual
1001                  * CPU.  For instance, the boot cpu might never be valid
1002                  * for hotplugging.
1003                  */
1004                 if (ppc_md.cpu_die)
1005                         c->hotpluggable = 1;
1006
1007                 if (cpu_online(cpu) || c->hotpluggable) {
1008                         register_cpu(c, cpu);
1009
1010                         device_create_file(&c->dev, &dev_attr_physical_id);
1011                 }
1012
1013                 if (cpu_online(cpu))
1014                         register_cpu_online(cpu);
1015         }
1016
1017         __register_cpu_notifier(&sysfs_cpu_nb);
1018
1019         cpu_notifier_register_done();
1020
1021 #ifdef CONFIG_PPC64
1022         sysfs_create_dscr_default();
1023 #endif /* CONFIG_PPC64 */
1024
1025         return 0;
1026 }
1027 subsys_initcall(topology_init);