LXR linux/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
  29static 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 */
  38DEFINE_PER_CPU(long, smt_snooze_delay) = { 100 };
  39
  40static 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
  57static 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
  66static DEVICE_ATTR(smt_snooze_delay, 0644, show_smt_snooze_delay,
  67                   store_smt_snooze_delay);
  68
  69static 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
  90static u64 pw20_wt;
  91static u64 altivec_idle_wt;
  92
  93static 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
 108static void do_show_pwrmgtcr0(void *val)
 109{
 110        u32 *value = val;
 111
 112        *value = mfspr(SPRN_PWRMGTCR0);
 113}
 114
 115static 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
 128static 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
 143static 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
 161static 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
 193static 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
 210static 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
 237static 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
 250static 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
 265static 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
 283static 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
 315static 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
 332static 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 */
 363static DEVICE_ATTR(pw20_state, 0600, show_pw20_state, store_pw20_state);
 364static 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 */
 377static DEVICE_ATTR(pw20_wait_time, 0600,
 378                        show_pw20_wait_time,
 379                        store_pw20_wait_time);
 380static 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
 390static DEFINE_PER_CPU(char, pmcs_enabled);
 391
 392void 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}
 405EXPORT_SYMBOL(ppc_enable_pmcs);
 406
 407#define __SYSFS_SPRSETUP_READ_WRITE(NAME, ADDRESS, EXTRA) \
 408static void read_##NAME(void *val) \
 409{ \
 410        *(unsigned long *)val = mfspr(ADDRESS); \
 411} \
 412static void write_##NAME(void *val) \
 413{ \
 414        EXTRA; \
 415        mtspr(ADDRESS, *(unsigned long *)val);  \
 416}
 417
 418#define __SYSFS_SPRSETUP_SHOW_STORE(NAME) \
 419static 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} \
 428static 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
 467SYSFS_PMCSETUP(mmcr0, SPRN_MMCR0);
 468SYSFS_PMCSETUP(mmcr1, SPRN_MMCR1);
 469SYSFS_PMCSETUP(pmc1, SPRN_PMC1);
 470SYSFS_PMCSETUP(pmc2, SPRN_PMC2);
 471SYSFS_PMCSETUP(pmc3, SPRN_PMC3);
 472SYSFS_PMCSETUP(pmc4, SPRN_PMC4);
 473SYSFS_PMCSETUP(pmc5, SPRN_PMC5);
 474SYSFS_PMCSETUP(pmc6, SPRN_PMC6);
 475
 476#ifdef HAS_PPC_PMC_G4
 477SYSFS_PMCSETUP(mmcr2, SPRN_MMCR2);
 478#endif
 479
 480#ifdef CONFIG_PPC64
 481SYSFS_PMCSETUP(pmc7, SPRN_PMC7);
 482SYSFS_PMCSETUP(pmc8, SPRN_PMC8);
 483
 484SYSFS_PMCSETUP(mmcra, SPRN_MMCRA);
 485SYSFS_SPRSETUP(purr, SPRN_PURR);
 486SYSFS_SPRSETUP(spurr, SPRN_SPURR);
 487SYSFS_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*/
 494static DEVICE_ATTR(mmcra, 0600, show_mmcra, store_mmcra);
 495static DEVICE_ATTR(spurr, 0400, show_spurr, NULL);
 496static DEVICE_ATTR(purr, 0400, show_purr, store_purr);
 497static DEVICE_ATTR(pir, 0400, show_pir, NULL);
 498
 499/*
 500 * This is the system wide DSCR register default value. Any
 501 * change to this default value through the sysfs interface
 502 * will update all per cpu DSCR default values across the
 503 * system stored in their respective PACA structures.
 504 */
 505static unsigned long dscr_default;
 506
 507/**
 508 * read_dscr() - Fetch the cpu specific DSCR default
 509 * @val:        Returned cpu specific DSCR default value
 510 *
 511 * This function returns the per cpu DSCR default value
 512 * for any cpu which is contained in it's PACA structure.
 513 */
 514static void read_dscr(void *val)
 515{
 516        *(unsigned long *)val = get_paca()->dscr_default;
 517}
 518
 519
 520/**
 521 * write_dscr() - Update the cpu specific DSCR default
 522 * @val:        New cpu specific DSCR default value to update
 523 *
 524 * This function updates the per cpu DSCR default value
 525 * for any cpu which is contained in it's PACA structure.
 526 */
 527static void write_dscr(void *val)
 528{
 529        get_paca()->dscr_default = *(unsigned long *)val;
 530        if (!current->thread.dscr_inherit) {
 531                current->thread.dscr = *(unsigned long *)val;
 532                mtspr(SPRN_DSCR, *(unsigned long *)val);
 533        }
 534}
 535
 536SYSFS_SPRSETUP_SHOW_STORE(dscr);
 537static DEVICE_ATTR(dscr, 0600, show_dscr, store_dscr);
 538
 539static void add_write_permission_dev_attr(struct device_attribute *attr)
 540{
 541        attr->attr.mode |= 0200;
 542}
 543
 544/**
 545 * show_dscr_default() - Fetch the system wide DSCR default
 546 * @dev:        Device structure
 547 * @attr:       Device attribute structure
 548 * @buf:        Interface buffer
 549 *
 550 * This function returns the system wide DSCR default value.
 551 */
 552static ssize_t show_dscr_default(struct device *dev,
 553                struct device_attribute *attr, char *buf)
 554{
 555        return sprintf(buf, "%lx\n", dscr_default);
 556}
 557
 558/**
 559 * store_dscr_default() - Update the system wide DSCR default
 560 * @dev:        Device structure
 561 * @attr:       Device attribute structure
 562 * @buf:        Interface buffer
 563 * @count:      Size of the update
 564 *
 565 * This function updates the system wide DSCR default value.
 566 */
 567static ssize_t __used store_dscr_default(struct device *dev,
 568                struct device_attribute *attr, const char *buf,
 569                size_t count)
 570{
 571        unsigned long val;
 572        int ret = 0;
 573        
 574        ret = sscanf(buf, "%lx", &val);
 575        if (ret != 1)
 576                return -EINVAL;
 577        dscr_default = val;
 578
 579        on_each_cpu(write_dscr, &val, 1);
 580
 581        return count;
 582}
 583
 584static DEVICE_ATTR(dscr_default, 0600,
 585                show_dscr_default, store_dscr_default);
 586
 587static void sysfs_create_dscr_default(void)
 588{
 589        int err = 0;
 590        if (cpu_has_feature(CPU_FTR_DSCR))
 591                err = device_create_file(cpu_subsys.dev_root, &dev_attr_dscr_default);
 592}
 593#endif /* CONFIG_PPC64 */
 594
 595#ifdef HAS_PPC_PMC_PA6T
 596SYSFS_PMCSETUP(pa6t_pmc0, SPRN_PA6T_PMC0);
 597SYSFS_PMCSETUP(pa6t_pmc1, SPRN_PA6T_PMC1);
 598SYSFS_PMCSETUP(pa6t_pmc2, SPRN_PA6T_PMC2);
 599SYSFS_PMCSETUP(pa6t_pmc3, SPRN_PA6T_PMC3);
 600SYSFS_PMCSETUP(pa6t_pmc4, SPRN_PA6T_PMC4);
 601SYSFS_PMCSETUP(pa6t_pmc5, SPRN_PA6T_PMC5);
 602#ifdef CONFIG_DEBUG_KERNEL
 603SYSFS_SPRSETUP(hid0, SPRN_HID0);
 604SYSFS_SPRSETUP(hid1, SPRN_HID1);
 605SYSFS_SPRSETUP(hid4, SPRN_HID4);
 606SYSFS_SPRSETUP(hid5, SPRN_HID5);
 607SYSFS_SPRSETUP(ima0, SPRN_PA6T_IMA0);
 608SYSFS_SPRSETUP(ima1, SPRN_PA6T_IMA1);
 609SYSFS_SPRSETUP(ima2, SPRN_PA6T_IMA2);
 610SYSFS_SPRSETUP(ima3, SPRN_PA6T_IMA3);
 611SYSFS_SPRSETUP(ima4, SPRN_PA6T_IMA4);
 612SYSFS_SPRSETUP(ima5, SPRN_PA6T_IMA5);
 613SYSFS_SPRSETUP(ima6, SPRN_PA6T_IMA6);
 614SYSFS_SPRSETUP(ima7, SPRN_PA6T_IMA7);
 615SYSFS_SPRSETUP(ima8, SPRN_PA6T_IMA8);
 616SYSFS_SPRSETUP(ima9, SPRN_PA6T_IMA9);
 617SYSFS_SPRSETUP(imaat, SPRN_PA6T_IMAAT);
 618SYSFS_SPRSETUP(btcr, SPRN_PA6T_BTCR);
 619SYSFS_SPRSETUP(pccr, SPRN_PA6T_PCCR);
 620SYSFS_SPRSETUP(rpccr, SPRN_PA6T_RPCCR);
 621SYSFS_SPRSETUP(der, SPRN_PA6T_DER);
 622SYSFS_SPRSETUP(mer, SPRN_PA6T_MER);
 623SYSFS_SPRSETUP(ber, SPRN_PA6T_BER);
 624SYSFS_SPRSETUP(ier, SPRN_PA6T_IER);
 625SYSFS_SPRSETUP(sier, SPRN_PA6T_SIER);
 626SYSFS_SPRSETUP(siar, SPRN_PA6T_SIAR);
 627SYSFS_SPRSETUP(tsr0, SPRN_PA6T_TSR0);
 628SYSFS_SPRSETUP(tsr1, SPRN_PA6T_TSR1);
 629SYSFS_SPRSETUP(tsr2, SPRN_PA6T_TSR2);
 630SYSFS_SPRSETUP(tsr3, SPRN_PA6T_TSR3);
 631#endif /* CONFIG_DEBUG_KERNEL */
 632#endif /* HAS_PPC_PMC_PA6T */
 633
 634#ifdef HAS_PPC_PMC_IBM
 635static struct device_attribute ibm_common_attrs[] = {
 636        __ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0),
 637        __ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1),
 638};
 639#endif /* HAS_PPC_PMC_G4 */
 640
 641#ifdef HAS_PPC_PMC_G4
 642static struct device_attribute g4_common_attrs[] = {
 643        __ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0),
 644        __ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1),
 645        __ATTR(mmcr2, 0600, show_mmcr2, store_mmcr2),
 646};
 647#endif /* HAS_PPC_PMC_G4 */
 648
 649static struct device_attribute classic_pmc_attrs[] = {
 650        __ATTR(pmc1, 0600, show_pmc1, store_pmc1),
 651        __ATTR(pmc2, 0600, show_pmc2, store_pmc2),
 652        __ATTR(pmc3, 0600, show_pmc3, store_pmc3),
 653        __ATTR(pmc4, 0600, show_pmc4, store_pmc4),
 654        __ATTR(pmc5, 0600, show_pmc5, store_pmc5),
 655        __ATTR(pmc6, 0600, show_pmc6, store_pmc6),
 656#ifdef CONFIG_PPC64
 657        __ATTR(pmc7, 0600, show_pmc7, store_pmc7),
 658        __ATTR(pmc8, 0600, show_pmc8, store_pmc8),
 659#endif
 660};
 661
 662#ifdef HAS_PPC_PMC_PA6T
 663static struct device_attribute pa6t_attrs[] = {
 664        __ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0),
 665        __ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1),
 666        __ATTR(pmc0, 0600, show_pa6t_pmc0, store_pa6t_pmc0),
 667        __ATTR(pmc1, 0600, show_pa6t_pmc1, store_pa6t_pmc1),
 668        __ATTR(pmc2, 0600, show_pa6t_pmc2, store_pa6t_pmc2),
 669        __ATTR(pmc3, 0600, show_pa6t_pmc3, store_pa6t_pmc3),
 670        __ATTR(pmc4, 0600, show_pa6t_pmc4, store_pa6t_pmc4),
 671        __ATTR(pmc5, 0600, show_pa6t_pmc5, store_pa6t_pmc5),
 672#ifdef CONFIG_DEBUG_KERNEL
 673        __ATTR(hid0, 0600, show_hid0, store_hid0),
 674        __ATTR(hid1, 0600, show_hid1, store_hid1),
 675        __ATTR(hid4, 0600, show_hid4, store_hid4),
 676        __ATTR(hid5, 0600, show_hid5, store_hid5),
 677        __ATTR(ima0, 0600, show_ima0, store_ima0),
 678        __ATTR(ima1, 0600, show_ima1, store_ima1),
 679        __ATTR(ima2, 0600, show_ima2, store_ima2),
 680        __ATTR(ima3, 0600, show_ima3, store_ima3),
 681        __ATTR(ima4, 0600, show_ima4, store_ima4),
 682        __ATTR(ima5, 0600, show_ima5, store_ima5),
 683        __ATTR(ima6, 0600, show_ima6, store_ima6),
 684        __ATTR(ima7, 0600, show_ima7, store_ima7),
 685        __ATTR(ima8, 0600, show_ima8, store_ima8),
 686        __ATTR(ima9, 0600, show_ima9, store_ima9),
 687        __ATTR(imaat, 0600, show_imaat, store_imaat),
 688        __ATTR(btcr, 0600, show_btcr, store_btcr),
 689        __ATTR(pccr, 0600, show_pccr, store_pccr),
 690        __ATTR(rpccr, 0600, show_rpccr, store_rpccr),
 691        __ATTR(der, 0600, show_der, store_der),
 692        __ATTR(mer, 0600, show_mer, store_mer),
 693        __ATTR(ber, 0600, show_ber, store_ber),
 694        __ATTR(ier, 0600, show_ier, store_ier),
 695        __ATTR(sier, 0600, show_sier, store_sier),
 696        __ATTR(siar, 0600, show_siar, store_siar),
 697        __ATTR(tsr0, 0600, show_tsr0, store_tsr0),
 698        __ATTR(tsr1, 0600, show_tsr1, store_tsr1),
 699        __ATTR(tsr2, 0600, show_tsr2, store_tsr2),
 700        __ATTR(tsr3, 0600, show_tsr3, store_tsr3),
 701#endif /* CONFIG_DEBUG_KERNEL */
 702};
 703#endif /* HAS_PPC_PMC_PA6T */
 704#endif /* HAS_PPC_PMC_CLASSIC */
 705
 706static void register_cpu_online(unsigned int cpu)
 707{
 708        struct cpu *c = &per_cpu(cpu_devices, cpu);
 709        struct device *s = &c->dev;
 710        struct device_attribute *attrs, *pmc_attrs;
 711        int i, nattrs;
 712
 713#ifdef CONFIG_PPC64
 714        if (cpu_has_feature(CPU_FTR_SMT))
 715                device_create_file(s, &dev_attr_smt_snooze_delay);
 716#endif
 717
 718        /* PMC stuff */
 719        switch (cur_cpu_spec->pmc_type) {
 720#ifdef HAS_PPC_PMC_IBM
 721        case PPC_PMC_IBM:
 722                attrs = ibm_common_attrs;
 723                nattrs = sizeof(ibm_common_attrs) / sizeof(struct device_attribute);
 724                pmc_attrs = classic_pmc_attrs;
 725                break;
 726#endif /* HAS_PPC_PMC_IBM */
 727#ifdef HAS_PPC_PMC_G4
 728        case PPC_PMC_G4:
 729                attrs = g4_common_attrs;
 730                nattrs = sizeof(g4_common_attrs) / sizeof(struct device_attribute);
 731                pmc_attrs = classic_pmc_attrs;
 732                break;
 733#endif /* HAS_PPC_PMC_G4 */
 734#ifdef HAS_PPC_PMC_PA6T
 735        case PPC_PMC_PA6T:
 736                /* PA Semi starts counting at PMC0 */
 737                attrs = pa6t_attrs;
 738                nattrs = sizeof(pa6t_attrs) / sizeof(struct device_attribute);
 739                pmc_attrs = NULL;
 740                break;
 741#endif /* HAS_PPC_PMC_PA6T */
 742        default:
 743                attrs = NULL;
 744                nattrs = 0;
 745                pmc_attrs = NULL;
 746        }
 747
 748        for (i = 0; i < nattrs; i++)
 749                device_create_file(s, &attrs[i]);
 750
 751        if (pmc_attrs)
 752                for (i = 0; i < cur_cpu_spec->num_pmcs; i++)
 753                        device_create_file(s, &pmc_attrs[i]);
 754
 755#ifdef CONFIG_PPC64
 756        if (cpu_has_feature(CPU_FTR_MMCRA))
 757                device_create_file(s, &dev_attr_mmcra);
 758
 759        if (cpu_has_feature(CPU_FTR_PURR)) {
 760                if (!firmware_has_feature(FW_FEATURE_LPAR))
 761                        add_write_permission_dev_attr(&dev_attr_purr);
 762                device_create_file(s, &dev_attr_purr);
 763        }
 764
 765        if (cpu_has_feature(CPU_FTR_SPURR))
 766                device_create_file(s, &dev_attr_spurr);
 767
 768        if (cpu_has_feature(CPU_FTR_DSCR))
 769                device_create_file(s, &dev_attr_dscr);
 770
 771        if (cpu_has_feature(CPU_FTR_PPCAS_ARCH_V2))
 772                device_create_file(s, &dev_attr_pir);
 773#endif /* CONFIG_PPC64 */
 774
 775#ifdef CONFIG_PPC_FSL_BOOK3E
 776        if (PVR_VER(cur_cpu_spec->pvr_value) == PVR_VER_E6500) {
 777                device_create_file(s, &dev_attr_pw20_state);
 778                device_create_file(s, &dev_attr_pw20_wait_time);
 779
 780                device_create_file(s, &dev_attr_altivec_idle);
 781                device_create_file(s, &dev_attr_altivec_idle_wait_time);
 782        }
 783#endif
 784        cacheinfo_cpu_online(cpu);
 785}
 786
 787#ifdef CONFIG_HOTPLUG_CPU
 788static void unregister_cpu_online(unsigned int cpu)
 789{
 790        struct cpu *c = &per_cpu(cpu_devices, cpu);
 791        struct device *s = &c->dev;
 792        struct device_attribute *attrs, *pmc_attrs;
 793        int i, nattrs;
 794
 795        BUG_ON(!c->hotpluggable);
 796
 797#ifdef CONFIG_PPC64
 798        if (cpu_has_feature(CPU_FTR_SMT))
 799                device_remove_file(s, &dev_attr_smt_snooze_delay);
 800#endif
 801
 802        /* PMC stuff */
 803        switch (cur_cpu_spec->pmc_type) {
 804#ifdef HAS_PPC_PMC_IBM
 805        case PPC_PMC_IBM:
 806                attrs = ibm_common_attrs;
 807                nattrs = sizeof(ibm_common_attrs) / sizeof(struct device_attribute);
 808                pmc_attrs = classic_pmc_attrs;
 809                break;
 810#endif /* HAS_PPC_PMC_IBM */
 811#ifdef HAS_PPC_PMC_G4
 812        case PPC_PMC_G4:
 813                attrs = g4_common_attrs;
 814                nattrs = sizeof(g4_common_attrs) / sizeof(struct device_attribute);
 815                pmc_attrs = classic_pmc_attrs;
 816                break;
 817#endif /* HAS_PPC_PMC_G4 */
 818#ifdef HAS_PPC_PMC_PA6T
 819        case PPC_PMC_PA6T:
 820                /* PA Semi starts counting at PMC0 */
 821                attrs = pa6t_attrs;
 822                nattrs = sizeof(pa6t_attrs) / sizeof(struct device_attribute);
 823                pmc_attrs = NULL;
 824                break;
 825#endif /* HAS_PPC_PMC_PA6T */
 826        default:
 827                attrs = NULL;
 828                nattrs = 0;
 829                pmc_attrs = NULL;
 830        }
 831
 832        for (i = 0; i < nattrs; i++)
 833                device_remove_file(s, &attrs[i]);
 834
 835        if (pmc_attrs)
 836                for (i = 0; i < cur_cpu_spec->num_pmcs; i++)
 837                        device_remove_file(s, &pmc_attrs[i]);
 838
 839#ifdef CONFIG_PPC64
 840        if (cpu_has_feature(CPU_FTR_MMCRA))
 841                device_remove_file(s, &dev_attr_mmcra);
 842
 843        if (cpu_has_feature(CPU_FTR_PURR))
 844                device_remove_file(s, &dev_attr_purr);
 845
 846        if (cpu_has_feature(CPU_FTR_SPURR))
 847                device_remove_file(s, &dev_attr_spurr);
 848
 849        if (cpu_has_feature(CPU_FTR_DSCR))
 850                device_remove_file(s, &dev_attr_dscr);
 851
 852        if (cpu_has_feature(CPU_FTR_PPCAS_ARCH_V2))
 853                device_remove_file(s, &dev_attr_pir);
 854#endif /* CONFIG_PPC64 */
 855
 856#ifdef CONFIG_PPC_FSL_BOOK3E
 857        if (PVR_VER(cur_cpu_spec->pvr_value) == PVR_VER_E6500) {
 858                device_remove_file(s, &dev_attr_pw20_state);
 859                device_remove_file(s, &dev_attr_pw20_wait_time);
 860
 861                device_remove_file(s, &dev_attr_altivec_idle);
 862                device_remove_file(s, &dev_attr_altivec_idle_wait_time);
 863        }
 864#endif
 865        cacheinfo_cpu_offline(cpu);
 866}
 867
 868#ifdef CONFIG_ARCH_CPU_PROBE_RELEASE
 869ssize_t arch_cpu_probe(const char *buf, size_t count)
 870{
 871        if (ppc_md.cpu_probe)
 872                return ppc_md.cpu_probe(buf, count);
 873
 874        return -EINVAL;
 875}
 876
 877ssize_t arch_cpu_release(const char *buf, size_t count)
 878{
 879        if (ppc_md.cpu_release)
 880                return ppc_md.cpu_release(buf, count);
 881
 882        return -EINVAL;
 883}
 884#endif /* CONFIG_ARCH_CPU_PROBE_RELEASE */
 885
 886#endif /* CONFIG_HOTPLUG_CPU */
 887
 888static int sysfs_cpu_notify(struct notifier_block *self,
 889                                      unsigned long action, void *hcpu)
 890{
 891        unsigned int cpu = (unsigned int)(long)hcpu;
 892
 893        switch (action) {
 894        case CPU_ONLINE:
 895        case CPU_ONLINE_FROZEN:
 896                register_cpu_online(cpu);
 897                break;
 898#ifdef CONFIG_HOTPLUG_CPU
 899        case CPU_DEAD:
 900        case CPU_DEAD_FROZEN:
 901                unregister_cpu_online(cpu);
 902                break;
 903#endif
 904        }
 905        return NOTIFY_OK;
 906}
 907
 908static struct notifier_block sysfs_cpu_nb = {
 909        .notifier_call  = sysfs_cpu_notify,
 910};
 911
 912static DEFINE_MUTEX(cpu_mutex);
 913
 914int cpu_add_dev_attr(struct device_attribute *attr)
 915{
 916        int cpu;
 917
 918        mutex_lock(&cpu_mutex);
 919
 920        for_each_possible_cpu(cpu) {
 921                device_create_file(get_cpu_device(cpu), attr);
 922        }
 923
 924        mutex_unlock(&cpu_mutex);
 925        return 0;
 926}
 927EXPORT_SYMBOL_GPL(cpu_add_dev_attr);
 928
 929int cpu_add_dev_attr_group(struct attribute_group *attrs)
 930{
 931        int cpu;
 932        struct device *dev;
 933        int ret;
 934
 935        mutex_lock(&cpu_mutex);
 936
 937        for_each_possible_cpu(cpu) {
 938                dev = get_cpu_device(cpu);
 939                ret = sysfs_create_group(&dev->kobj, attrs);
 940                WARN_ON(ret != 0);
 941        }
 942
 943        mutex_unlock(&cpu_mutex);
 944        return 0;
 945}
 946EXPORT_SYMBOL_GPL(cpu_add_dev_attr_group);
 947
 948
 949void cpu_remove_dev_attr(struct device_attribute *attr)
 950{
 951        int cpu;
 952
 953        mutex_lock(&cpu_mutex);
 954
 955        for_each_possible_cpu(cpu) {
 956                device_remove_file(get_cpu_device(cpu), attr);
 957        }
 958
 959        mutex_unlock(&cpu_mutex);
 960}
 961EXPORT_SYMBOL_GPL(cpu_remove_dev_attr);
 962
 963void cpu_remove_dev_attr_group(struct attribute_group *attrs)
 964{
 965        int cpu;
 966        struct device *dev;
 967
 968        mutex_lock(&cpu_mutex);
 969
 970        for_each_possible_cpu(cpu) {
 971                dev = get_cpu_device(cpu);
 972                sysfs_remove_group(&dev->kobj, attrs);
 973        }
 974
 975        mutex_unlock(&cpu_mutex);
 976}
 977EXPORT_SYMBOL_GPL(cpu_remove_dev_attr_group);
 978
 979
 980/* NUMA stuff */
 981
 982#ifdef CONFIG_NUMA
 983static void register_nodes(void)
 984{
 985        int i;
 986
 987        for (i = 0; i < MAX_NUMNODES; i++)
 988                register_one_node(i);
 989}
 990
 991int sysfs_add_device_to_node(struct device *dev, int nid)
 992{
 993        struct node *node = node_devices[nid];
 994        return sysfs_create_link(&node->dev.kobj, &dev->kobj,
 995                        kobject_name(&dev->kobj));
 996}
 997EXPORT_SYMBOL_GPL(sysfs_add_device_to_node);
 998
 999void sysfs_remove_device_from_node(struct device *dev, int nid)
1000{

1001        struct node *node = node_devices[nid];
1002        sysfs_remove_link(&node->dev.kobj, kobject_name(&dev->kobj));
1003}
1004EXPORT_SYMBOL_GPL(sysfs_remove_device_from_node);
1005
1006#else
1007static void register_nodes(void)
1008{
1009        return;
1010}
1011
1012#endif
1013
1014/* Only valid if CPU is present. */
1015static ssize_t show_physical_id(struct device *dev,
1016                                struct device_attribute *attr, char *buf)
1017{
1018        struct cpu *cpu = container_of(dev, struct cpu, dev);
1019
1020        return sprintf(buf, "%d\n", get_hard_smp_processor_id(cpu->dev.id));
1021}
1022static DEVICE_ATTR(physical_id, 0444, show_physical_id, NULL);
1023
1024static int __init topology_init(void)
1025{
1026        int cpu;
1027
1028        register_nodes();
1029
1030        cpu_notifier_register_begin();
1031
1032        for_each_possible_cpu(cpu) {
1033                struct cpu *c = &per_cpu(cpu_devices, cpu);
1034
1035                /*
1036                 * For now, we just see if the system supports making
1037                 * the RTAS calls for CPU hotplug.  But, there may be a
1038                 * more comprehensive way to do this for an individual
1039                 * CPU.  For instance, the boot cpu might never be valid
1040                 * for hotplugging.
1041                 */
1042                if (ppc_md.cpu_die)
1043                        c->hotpluggable = 1;
1044
1045                if (cpu_online(cpu) || c->hotpluggable) {
1046                        register_cpu(c, cpu);
1047
1048                        device_create_file(&c->dev, &dev_attr_physical_id);
1049                }
1050
1051                if (cpu_online(cpu))
1052                        register_cpu_online(cpu);
1053        }
1054
1055        __register_cpu_notifier(&sysfs_cpu_nb);
1056
1057        cpu_notifier_register_done();
1058
1059#ifdef CONFIG_PPC64
1060        sysfs_create_dscr_default();
1061#endif /* CONFIG_PPC64 */
1062
1063        return 0;
1064}
1065subsys_initcall(topology_init);
1066