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 static 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 SYSFS_SPRSETUP(tscr, SPRN_TSCR);
 489
 490 /*
 491   Lets only enable read for phyp resources and
 492   enable write when needed with a separate function.
 493   Lets be conservative and default to pseries.
 494 */
 495 static DEVICE_ATTR(mmcra, 0600, show_mmcra, store_mmcra);
 496 static DEVICE_ATTR(spurr, 0400, show_spurr, NULL);
 497 static DEVICE_ATTR(purr, 0400, show_purr, store_purr);
 498 static DEVICE_ATTR(pir, 0400, show_pir, NULL);
 499 static DEVICE_ATTR(tscr, 0600, show_tscr, store_tscr);
 500
 501 /*
 502  * This is the system wide DSCR register default value. Any
 503  * change to this default value through the sysfs interface
 504  * will update all per cpu DSCR default values across the
 505  * system stored in their respective PACA structures.
 506  */
 507 static unsigned long dscr_default;
 508
 509 /**
 510  * read_dscr() - Fetch the cpu specific DSCR default
 511  * @val:        Returned cpu specific DSCR default value
 512  *
 513  * This function returns the per cpu DSCR default value
 514  * for any cpu which is contained in it's PACA structure.
 515  */
 516 static void read_dscr(void *val)
 517 {
 518         *(unsigned long *)val = get_paca()->dscr_default;
 519 }
 520
 521
 522 /**
 523  * write_dscr() - Update the cpu specific DSCR default
 524  * @val:        New cpu specific DSCR default value to update
 525  *
 526  * This function updates the per cpu DSCR default value
 527  * for any cpu which is contained in it's PACA structure.
 528  */
 529 static void write_dscr(void *val)
 530 {
 531         get_paca()->dscr_default = *(unsigned long *)val;
 532         if (!current->thread.dscr_inherit) {
 533                 current->thread.dscr = *(unsigned long *)val;
 534                 mtspr(SPRN_DSCR, *(unsigned long *)val);
 535         }
 536 }
 537
 538 SYSFS_SPRSETUP_SHOW_STORE(dscr);
 539 static DEVICE_ATTR(dscr, 0600, show_dscr, store_dscr);
 540
 541 static void add_write_permission_dev_attr(struct device_attribute *attr)
 542 {
 543         attr->attr.mode |= 0200;
 544 }
 545
 546 /**
 547  * show_dscr_default() - Fetch the system wide DSCR default
 548  * @dev:        Device structure
 549  * @attr:       Device attribute structure
 550  * @buf:        Interface buffer
 551  *
 552  * This function returns the system wide DSCR default value.
 553  */
 554 static ssize_t show_dscr_default(struct device *dev,
 555                 struct device_attribute *attr, char *buf)
 556 {
 557         return sprintf(buf, "%lx\n", dscr_default);
 558 }
 559
 560 /**
 561  * store_dscr_default() - Update the system wide DSCR default
 562  * @dev:        Device structure
 563  * @attr:       Device attribute structure
 564  * @buf:        Interface buffer
 565  * @count:      Size of the update
 566  *
 567  * This function updates the system wide DSCR default value.
 568  */
 569 static ssize_t __used store_dscr_default(struct device *dev,
 570                 struct device_attribute *attr, const char *buf,
 571                 size_t count)
 572 {
 573         unsigned long val;
 574         int ret = 0;
 575
 576         ret = sscanf(buf, "%lx", &val);
 577         if (ret != 1)
 578                 return -EINVAL;
 579         dscr_default = val;
 580
 581         on_each_cpu(write_dscr, &val, 1);
 582
 583         return count;
 584 }
 585
 586 static DEVICE_ATTR(dscr_default, 0600,
 587                 show_dscr_default, store_dscr_default);
 588
 589 static void sysfs_create_dscr_default(void)
 590 {
 591         int err = 0;
 592         if (cpu_has_feature(CPU_FTR_DSCR))
 593                 err = device_create_file(cpu_subsys.dev_root, &dev_attr_dscr_default);
 594 }
 595
 596 void __init record_spr_defaults(void)
 597 {
 598         int cpu;
 599
 600         if (cpu_has_feature(CPU_FTR_DSCR)) {
 601                 dscr_default = mfspr(SPRN_DSCR);
 602                 for (cpu = 0; cpu < nr_cpu_ids; cpu++)
 603                         paca[cpu].dscr_default = dscr_default;
 604         }
 605 }
 606 #endif /* CONFIG_PPC64 */
 607
 608 #ifdef HAS_PPC_PMC_PA6T
 609 SYSFS_PMCSETUP(pa6t_pmc0, SPRN_PA6T_PMC0);
 610 SYSFS_PMCSETUP(pa6t_pmc1, SPRN_PA6T_PMC1);
 611 SYSFS_PMCSETUP(pa6t_pmc2, SPRN_PA6T_PMC2);
 612 SYSFS_PMCSETUP(pa6t_pmc3, SPRN_PA6T_PMC3);
 613 SYSFS_PMCSETUP(pa6t_pmc4, SPRN_PA6T_PMC4);
 614 SYSFS_PMCSETUP(pa6t_pmc5, SPRN_PA6T_PMC5);
 615 #ifdef CONFIG_DEBUG_KERNEL
 616 SYSFS_SPRSETUP(hid0, SPRN_HID0);
 617 SYSFS_SPRSETUP(hid1, SPRN_HID1);
 618 SYSFS_SPRSETUP(hid4, SPRN_HID4);
 619 SYSFS_SPRSETUP(hid5, SPRN_HID5);
 620 SYSFS_SPRSETUP(ima0, SPRN_PA6T_IMA0);
 621 SYSFS_SPRSETUP(ima1, SPRN_PA6T_IMA1);
 622 SYSFS_SPRSETUP(ima2, SPRN_PA6T_IMA2);
 623 SYSFS_SPRSETUP(ima3, SPRN_PA6T_IMA3);
 624 SYSFS_SPRSETUP(ima4, SPRN_PA6T_IMA4);
 625 SYSFS_SPRSETUP(ima5, SPRN_PA6T_IMA5);
 626 SYSFS_SPRSETUP(ima6, SPRN_PA6T_IMA6);
 627 SYSFS_SPRSETUP(ima7, SPRN_PA6T_IMA7);
 628 SYSFS_SPRSETUP(ima8, SPRN_PA6T_IMA8);
 629 SYSFS_SPRSETUP(ima9, SPRN_PA6T_IMA9);
 630 SYSFS_SPRSETUP(imaat, SPRN_PA6T_IMAAT);
 631 SYSFS_SPRSETUP(btcr, SPRN_PA6T_BTCR);
 632 SYSFS_SPRSETUP(pccr, SPRN_PA6T_PCCR);
 633 SYSFS_SPRSETUP(rpccr, SPRN_PA6T_RPCCR);
 634 SYSFS_SPRSETUP(der, SPRN_PA6T_DER);
 635 SYSFS_SPRSETUP(mer, SPRN_PA6T_MER);
 636 SYSFS_SPRSETUP(ber, SPRN_PA6T_BER);
 637 SYSFS_SPRSETUP(ier, SPRN_PA6T_IER);
 638 SYSFS_SPRSETUP(sier, SPRN_PA6T_SIER);
 639 SYSFS_SPRSETUP(siar, SPRN_PA6T_SIAR);
 640 SYSFS_SPRSETUP(tsr0, SPRN_PA6T_TSR0);
 641 SYSFS_SPRSETUP(tsr1, SPRN_PA6T_TSR1);
 642 SYSFS_SPRSETUP(tsr2, SPRN_PA6T_TSR2);
 643 SYSFS_SPRSETUP(tsr3, SPRN_PA6T_TSR3);
 644 #endif /* CONFIG_DEBUG_KERNEL */
 645 #endif /* HAS_PPC_PMC_PA6T */
 646
 647 #ifdef HAS_PPC_PMC_IBM
 648 static struct device_attribute ibm_common_attrs[] = {
 649         __ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0),
 650         __ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1),
 651 };
 652 #endif /* HAS_PPC_PMC_G4 */
 653
 654 #ifdef HAS_PPC_PMC_G4
 655 static struct device_attribute g4_common_attrs[] = {
 656         __ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0),
 657         __ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1),
 658         __ATTR(mmcr2, 0600, show_mmcr2, store_mmcr2),
 659 };
 660 #endif /* HAS_PPC_PMC_G4 */
 661
 662 static struct device_attribute classic_pmc_attrs[] = {
 663         __ATTR(pmc1, 0600, show_pmc1, store_pmc1),
 664         __ATTR(pmc2, 0600, show_pmc2, store_pmc2),
 665         __ATTR(pmc3, 0600, show_pmc3, store_pmc3),
 666         __ATTR(pmc4, 0600, show_pmc4, store_pmc4),
 667         __ATTR(pmc5, 0600, show_pmc5, store_pmc5),
 668         __ATTR(pmc6, 0600, show_pmc6, store_pmc6),
 669 #ifdef CONFIG_PPC64
 670         __ATTR(pmc7, 0600, show_pmc7, store_pmc7),
 671         __ATTR(pmc8, 0600, show_pmc8, store_pmc8),
 672 #endif
 673 };
 674
 675 #ifdef HAS_PPC_PMC_PA6T
 676 static struct device_attribute pa6t_attrs[] = {
 677         __ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0),
 678         __ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1),
 679         __ATTR(pmc0, 0600, show_pa6t_pmc0, store_pa6t_pmc0),
 680         __ATTR(pmc1, 0600, show_pa6t_pmc1, store_pa6t_pmc1),
 681         __ATTR(pmc2, 0600, show_pa6t_pmc2, store_pa6t_pmc2),
 682         __ATTR(pmc3, 0600, show_pa6t_pmc3, store_pa6t_pmc3),
 683         __ATTR(pmc4, 0600, show_pa6t_pmc4, store_pa6t_pmc4),
 684         __ATTR(pmc5, 0600, show_pa6t_pmc5, store_pa6t_pmc5),
 685 #ifdef CONFIG_DEBUG_KERNEL
 686         __ATTR(hid0, 0600, show_hid0, store_hid0),
 687         __ATTR(hid1, 0600, show_hid1, store_hid1),
 688         __ATTR(hid4, 0600, show_hid4, store_hid4),
 689         __ATTR(hid5, 0600, show_hid5, store_hid5),
 690         __ATTR(ima0, 0600, show_ima0, store_ima0),
 691         __ATTR(ima1, 0600, show_ima1, store_ima1),
 692         __ATTR(ima2, 0600, show_ima2, store_ima2),
 693         __ATTR(ima3, 0600, show_ima3, store_ima3),
 694         __ATTR(ima4, 0600, show_ima4, store_ima4),
 695         __ATTR(ima5, 0600, show_ima5, store_ima5),
 696         __ATTR(ima6, 0600, show_ima6, store_ima6),
 697         __ATTR(ima7, 0600, show_ima7, store_ima7),
 698         __ATTR(ima8, 0600, show_ima8, store_ima8),
 699         __ATTR(ima9, 0600, show_ima9, store_ima9),
 700         __ATTR(imaat, 0600, show_imaat, store_imaat),
 701         __ATTR(btcr, 0600, show_btcr, store_btcr),
 702         __ATTR(pccr, 0600, show_pccr, store_pccr),
 703         __ATTR(rpccr, 0600, show_rpccr, store_rpccr),
 704         __ATTR(der, 0600, show_der, store_der),
 705         __ATTR(mer, 0600, show_mer, store_mer),
 706         __ATTR(ber, 0600, show_ber, store_ber),
 707         __ATTR(ier, 0600, show_ier, store_ier),
 708         __ATTR(sier, 0600, show_sier, store_sier),
 709         __ATTR(siar, 0600, show_siar, store_siar),
 710         __ATTR(tsr0, 0600, show_tsr0, store_tsr0),
 711         __ATTR(tsr1, 0600, show_tsr1, store_tsr1),
 712         __ATTR(tsr2, 0600, show_tsr2, store_tsr2),
 713         __ATTR(tsr3, 0600, show_tsr3, store_tsr3),
 714 #endif /* CONFIG_DEBUG_KERNEL */
 715 };
 716 #endif /* HAS_PPC_PMC_PA6T */
 717 #endif /* HAS_PPC_PMC_CLASSIC */
 718
 719 static int register_cpu_online(unsigned int cpu)
 720 {
 721         struct cpu *c = &per_cpu(cpu_devices, cpu);
 722         struct device *s = &c->dev;
 723         struct device_attribute *attrs, *pmc_attrs;
 724         int i, nattrs;
 725
 726         /* For cpus present at boot a reference was already grabbed in register_cpu() */
 727         if (!s->of_node)
 728                 s->of_node = of_get_cpu_node(cpu, NULL);
 729
 730 #ifdef CONFIG_PPC64
 731         if (cpu_has_feature(CPU_FTR_SMT))
 732                 device_create_file(s, &dev_attr_smt_snooze_delay);
 733 #endif
 734
 735         /* PMC stuff */
 736         switch (cur_cpu_spec->pmc_type) {
 737 #ifdef HAS_PPC_PMC_IBM
 738         case PPC_PMC_IBM:
 739                 attrs = ibm_common_attrs;
 740                 nattrs = sizeof(ibm_common_attrs) / sizeof(struct device_attribute);
 741                 pmc_attrs = classic_pmc_attrs;
 742                 break;
 743 #endif /* HAS_PPC_PMC_IBM */
 744 #ifdef HAS_PPC_PMC_G4
 745         case PPC_PMC_G4:
 746                 attrs = g4_common_attrs;
 747                 nattrs = sizeof(g4_common_attrs) / sizeof(struct device_attribute);
 748                 pmc_attrs = classic_pmc_attrs;
 749                 break;
 750 #endif /* HAS_PPC_PMC_G4 */
 751 #ifdef HAS_PPC_PMC_PA6T
 752         case PPC_PMC_PA6T:
 753                 /* PA Semi starts counting at PMC0 */
 754                 attrs = pa6t_attrs;
 755                 nattrs = sizeof(pa6t_attrs) / sizeof(struct device_attribute);
 756                 pmc_attrs = NULL;
 757                 break;
 758 #endif /* HAS_PPC_PMC_PA6T */
 759         default:
 760                 attrs = NULL;
 761                 nattrs = 0;
 762                 pmc_attrs = NULL;
 763         }
 764
 765         for (i = 0; i < nattrs; i++)
 766                 device_create_file(s, &attrs[i]);
 767
 768         if (pmc_attrs)
 769                 for (i = 0; i < cur_cpu_spec->num_pmcs; i++)
 770                         device_create_file(s, &pmc_attrs[i]);
 771
 772 #ifdef CONFIG_PPC64
 773         if (cpu_has_feature(CPU_FTR_MMCRA))
 774                 device_create_file(s, &dev_attr_mmcra);
 775
 776         if (cpu_has_feature(CPU_FTR_PURR)) {
 777                 if (!firmware_has_feature(FW_FEATURE_LPAR))
 778                         add_write_permission_dev_attr(&dev_attr_purr);
 779                 device_create_file(s, &dev_attr_purr);
 780         }
 781
 782         if (cpu_has_feature(CPU_FTR_SPURR))
 783                 device_create_file(s, &dev_attr_spurr);
 784
 785         if (cpu_has_feature(CPU_FTR_DSCR))
 786                 device_create_file(s, &dev_attr_dscr);
 787
 788         if (cpu_has_feature(CPU_FTR_PPCAS_ARCH_V2))
 789                 device_create_file(s, &dev_attr_pir);
 790
 791         if (cpu_has_feature(CPU_FTR_ARCH_206) &&
 792                 !firmware_has_feature(FW_FEATURE_LPAR))
 793                 device_create_file(s, &dev_attr_tscr);
 794 #endif /* CONFIG_PPC64 */
 795
 796 #ifdef CONFIG_PPC_FSL_BOOK3E
 797         if (PVR_VER(cur_cpu_spec->pvr_value) == PVR_VER_E6500) {
 798                 device_create_file(s, &dev_attr_pw20_state);
 799                 device_create_file(s, &dev_attr_pw20_wait_time);
 800
 801                 device_create_file(s, &dev_attr_altivec_idle);
 802                 device_create_file(s, &dev_attr_altivec_idle_wait_time);
 803         }
 804 #endif
 805         cacheinfo_cpu_online(cpu);
 806         return 0;
 807 }
 808
 809 #ifdef CONFIG_HOTPLUG_CPU
 810 static int unregister_cpu_online(unsigned int cpu)
 811 {
 812         struct cpu *c = &per_cpu(cpu_devices, cpu);
 813         struct device *s = &c->dev;
 814         struct device_attribute *attrs, *pmc_attrs;
 815         int i, nattrs;
 816
 817         BUG_ON(!c->hotpluggable);
 818
 819 #ifdef CONFIG_PPC64
 820         if (cpu_has_feature(CPU_FTR_SMT))
 821                 device_remove_file(s, &dev_attr_smt_snooze_delay);
 822 #endif
 823
 824         /* PMC stuff */
 825         switch (cur_cpu_spec->pmc_type) {
 826 #ifdef HAS_PPC_PMC_IBM
 827         case PPC_PMC_IBM:
 828                 attrs = ibm_common_attrs;
 829                 nattrs = sizeof(ibm_common_attrs) / sizeof(struct device_attribute);
 830                 pmc_attrs = classic_pmc_attrs;
 831                 break;
 832 #endif /* HAS_PPC_PMC_IBM */
 833 #ifdef HAS_PPC_PMC_G4
 834         case PPC_PMC_G4:
 835                 attrs = g4_common_attrs;
 836                 nattrs = sizeof(g4_common_attrs) / sizeof(struct device_attribute);
 837                 pmc_attrs = classic_pmc_attrs;
 838                 break;
 839 #endif /* HAS_PPC_PMC_G4 */
 840 #ifdef HAS_PPC_PMC_PA6T
 841         case PPC_PMC_PA6T:
 842                 /* PA Semi starts counting at PMC0 */
 843                 attrs = pa6t_attrs;
 844                 nattrs = sizeof(pa6t_attrs) / sizeof(struct device_attribute);
 845                 pmc_attrs = NULL;
 846                 break;
 847 #endif /* HAS_PPC_PMC_PA6T */
 848         default:
 849                 attrs = NULL;
 850                 nattrs = 0;
 851                 pmc_attrs = NULL;
 852         }
 853
 854         for (i = 0; i < nattrs; i++)
 855                 device_remove_file(s, &attrs[i]);
 856
 857         if (pmc_attrs)
 858                 for (i = 0; i < cur_cpu_spec->num_pmcs; i++)
 859                         device_remove_file(s, &pmc_attrs[i]);
 860
 861 #ifdef CONFIG_PPC64
 862         if (cpu_has_feature(CPU_FTR_MMCRA))
 863                 device_remove_file(s, &dev_attr_mmcra);
 864
 865         if (cpu_has_feature(CPU_FTR_PURR))
 866                 device_remove_file(s, &dev_attr_purr);
 867
 868         if (cpu_has_feature(CPU_FTR_SPURR))
 869                 device_remove_file(s, &dev_attr_spurr);
 870
 871         if (cpu_has_feature(CPU_FTR_DSCR))
 872                 device_remove_file(s, &dev_attr_dscr);
 873
 874         if (cpu_has_feature(CPU_FTR_PPCAS_ARCH_V2))
 875                 device_remove_file(s, &dev_attr_pir);
 876
 877         if (cpu_has_feature(CPU_FTR_ARCH_206) &&
 878                 !firmware_has_feature(FW_FEATURE_LPAR))
 879                 device_remove_file(s, &dev_attr_tscr);
 880 #endif /* CONFIG_PPC64 */
 881
 882 #ifdef CONFIG_PPC_FSL_BOOK3E
 883         if (PVR_VER(cur_cpu_spec->pvr_value) == PVR_VER_E6500) {
 884                 device_remove_file(s, &dev_attr_pw20_state);
 885                 device_remove_file(s, &dev_attr_pw20_wait_time);
 886
 887                 device_remove_file(s, &dev_attr_altivec_idle);
 888                 device_remove_file(s, &dev_attr_altivec_idle_wait_time);
 889         }
 890 #endif
 891         cacheinfo_cpu_offline(cpu);
 892         of_node_put(s->of_node);
 893         s->of_node = NULL;
 894         return 0;
 895 }
 896 #else /* !CONFIG_HOTPLUG_CPU */
 897 #define unregister_cpu_online NULL
 898 #endif
 899
 900 #ifdef CONFIG_ARCH_CPU_PROBE_RELEASE
 901 ssize_t arch_cpu_probe(const char *buf, size_t count)
 902 {
 903         if (ppc_md.cpu_probe)
 904                 return ppc_md.cpu_probe(buf, count);
 905
 906         return -EINVAL;
 907 }
 908
 909 ssize_t arch_cpu_release(const char *buf, size_t count)
 910 {
 911         if (ppc_md.cpu_release)
 912                 return ppc_md.cpu_release(buf, count);
 913
 914         return -EINVAL;
 915 }
 916 #endif /* CONFIG_ARCH_CPU_PROBE_RELEASE */
 917
 918 static DEFINE_MUTEX(cpu_mutex);
 919
 920 int cpu_add_dev_attr(struct device_attribute *attr)
 921 {
 922         int cpu;
 923
 924         mutex_lock(&cpu_mutex);
 925
 926         for_each_possible_cpu(cpu) {
 927                 device_create_file(get_cpu_device(cpu), attr);
 928         }
 929
 930         mutex_unlock(&cpu_mutex);
 931         return 0;
 932 }
 933 EXPORT_SYMBOL_GPL(cpu_add_dev_attr);
 934
 935 int cpu_add_dev_attr_group(struct attribute_group *attrs)
 936 {
 937         int cpu;
 938         struct device *dev;
 939         int ret;
 940
 941         mutex_lock(&cpu_mutex);
 942
 943         for_each_possible_cpu(cpu) {
 944                 dev = get_cpu_device(cpu);
 945                 ret = sysfs_create_group(&dev->kobj, attrs);
 946                 WARN_ON(ret != 0);
 947         }
 948
 949         mutex_unlock(&cpu_mutex);
 950         return 0;
 951 }
 952 EXPORT_SYMBOL_GPL(cpu_add_dev_attr_group);
 953
 954
 955 void cpu_remove_dev_attr(struct device_attribute *attr)
 956 {
 957         int cpu;
 958
 959         mutex_lock(&cpu_mutex);
 960
 961         for_each_possible_cpu(cpu) {
 962                 device_remove_file(get_cpu_device(cpu), attr);
 963         }
 964
 965         mutex_unlock(&cpu_mutex);
 966 }
 967 EXPORT_SYMBOL_GPL(cpu_remove_dev_attr);
 968
 969 void cpu_remove_dev_attr_group(struct attribute_group *attrs)
 970 {
 971         int cpu;
 972         struct device *dev;
 973
 974         mutex_lock(&cpu_mutex);
 975
 976         for_each_possible_cpu(cpu) {
 977                 dev = get_cpu_device(cpu);
 978                 sysfs_remove_group(&dev->kobj, attrs);
 979         }
 980
 981         mutex_unlock(&cpu_mutex);
 982 }
 983 EXPORT_SYMBOL_GPL(cpu_remove_dev_attr_group);
 984
 985
 986 /* NUMA stuff */
 987
 988 #ifdef CONFIG_NUMA
 989 static void register_nodes(void)
 990 {
 991         int i;
 992
 993         for (i = 0; i < MAX_NUMNODES; i++)
 994                 register_one_node(i);
 995 }
 996
 997 int sysfs_add_device_to_node(struct device *dev, int nid)
 998 {
 999         struct node *node = node_devices[nid];
1000         return sysfs_create_link(&node->dev.kobj, &dev->kobj,
1001                         kobject_name(&dev->kobj));
1002 }
1003 EXPORT_SYMBOL_GPL(sysfs_add_device_to_node);
1004
1005 void sysfs_remove_device_from_node(struct device *dev, int nid)
1006 {
1007         struct node *node = node_devices[nid];
1008         sysfs_remove_link(&node->dev.kobj, kobject_name(&dev->kobj));
1009 }
1010 EXPORT_SYMBOL_GPL(sysfs_remove_device_from_node);
1011
1012 #else
1013 static void register_nodes(void)
1014 {
1015         return;
1016 }
1017
1018 #endif
1019
1020 /* Only valid if CPU is present. */
1021 static ssize_t show_physical_id(struct device *dev,
1022                                 struct device_attribute *attr, char *buf)
1023 {
1024         struct cpu *cpu = container_of(dev, struct cpu, dev);
1025
1026         return sprintf(buf, "%d\n", get_hard_smp_processor_id(cpu->dev.id));
1027 }
1028 static DEVICE_ATTR(physical_id, 0444, show_physical_id, NULL);
1029
1030 static int __init topology_init(void)
1031 {
1032         int cpu, r;
1033
1034         register_nodes();
1035
1036         for_each_possible_cpu(cpu) {
1037                 struct cpu *c = &per_cpu(cpu_devices, cpu);
1038
1039                 /*
1040                  * For now, we just see if the system supports making
1041                  * the RTAS calls for CPU hotplug.  But, there may be a
1042                  * more comprehensive way to do this for an individual
1043                  * CPU.  For instance, the boot cpu might never be valid
1044                  * for hotplugging.
1045                  */
1046                 if (ppc_md.cpu_die)
1047                         c->hotpluggable = 1;
1048
1049                 if (cpu_online(cpu) || c->hotpluggable) {
1050                         register_cpu(c, cpu);
1051
1052                         device_create_file(&c->dev, &dev_attr_physical_id);
1053                 }
1054         }
1055         r = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "powerpc/topology:online",
1056                               register_cpu_online, unregister_cpu_online);
1057         WARN_ON(r < 0);
1058 #ifdef CONFIG_PPC64
1059         sysfs_create_dscr_default();
1060 #endif /* CONFIG_PPC64 */
1061
1062         return 0;
1063 }
1064 subsys_initcall(topology_init);