1 // SPDX-License-Identifier: GPL-2.0-only 2 #include <linux/device.h> 3 #include <linux/cpu.h> 4 #include <linux/smp.h> 5 #include <linux/percpu.h> 6 #include <linux/init.h> 7 #include <linux/sched.h> 8 #include <linux/export.h> 9 #include <linux/nodemask.h> 10 #include <linux/cpumask.h> 11 #include <linux/notifier.h> 12 #include <linux/of.h> 13 14 #include <asm/current.h> 15 #include <asm/processor.h> 16 #include <asm/cputable.h> 17 #include <asm/hvcall.h> 18 #include <asm/machdep.h> 19 #include <asm/smp.h> 20 #include <asm/pmc.h> 21 #include <asm/firmware.h> 22 #include <asm/idle.h> 23 #include <asm/svm.h> 24 25 #include "cacheinfo.h" 26 #include "setup.h" 27 28 #ifdef CONFIG_PPC64 29 #include <asm/paca.h> 30 #include <asm/lppaca.h> 31 #endif 32 33 static DEFINE_PER_CPU(struct cpu, cpu_devices); 34 35 #ifdef CONFIG_PPC64 36 37 /* 38 * Snooze delay has not been hooked up since 3fa8cad82b94 ("powerpc/pseries/cpuidle: 39 * smt-snooze-delay cleanup.") and has been broken even longer. As was foretold in 40 * 2014: 41 * 42 * "ppc64_util currently utilises it. Once we fix ppc64_util, propose to clean 43 * up the kernel code." 44 * 45 * powerpc-utils stopped using it as of 1.3.8. At some point in the future this 46 * code should be removed. 47 */ 48 49 static ssize_t store_smt_snooze_delay(struct device *dev, 50 struct device_attribute *attr, 51 const char *buf, 52 size_t count) 53 { 54 pr_warn_once("%s (%d) stored to unsupported smt_snooze_delay, which has no effect.\n", 55 current->comm, current->pid); 56 return count; 57 } 58 59 static ssize_t show_smt_snooze_delay(struct device *dev, 60 struct device_attribute *attr, 61 char *buf) 62 { 63 pr_warn_once("%s (%d) read from unsupported smt_snooze_delay\n", 64 current->comm, current->pid); 65 return sprintf(buf, "100\n"); 66 } 67 68 static DEVICE_ATTR(smt_snooze_delay, 0644, show_smt_snooze_delay, 69 store_smt_snooze_delay); 70 71 static int __init setup_smt_snooze_delay(char *str) 72 { 73 if (!cpu_has_feature(CPU_FTR_SMT)) 74 return 1; 75 76 pr_warn("smt-snooze-delay command line option has no effect\n"); 77 return 1; 78 } 79 __setup("smt-snooze-delay=", setup_smt_snooze_delay); 80 81 #endif /* CONFIG_PPC64 */ 82 83 #define __SYSFS_SPRSETUP_READ_WRITE(NAME, ADDRESS, EXTRA) \ 84 static void read_##NAME(void *val) \ 85 { \ 86 *(unsigned long *)val = mfspr(ADDRESS); \ 87 } \ 88 static void write_##NAME(void *val) \ 89 { \ 90 EXTRA; \ 91 mtspr(ADDRESS, *(unsigned long *)val); \ 92 } 93 94 #define __SYSFS_SPRSETUP_SHOW_STORE(NAME) \ 95 static ssize_t show_##NAME(struct device *dev, \ 96 struct device_attribute *attr, \ 97 char *buf) \ 98 { \ 99 struct cpu *cpu = container_of(dev, struct cpu, dev); \ 100 unsigned long val; \ 101 smp_call_function_single(cpu->dev.id, read_##NAME, &val, 1); \ 102 return sprintf(buf, "%lx\n", val); \ 103 } \ 104 static ssize_t __used \ 105 store_##NAME(struct device *dev, struct device_attribute *attr, \ 106 const char *buf, size_t count) \ 107 { \ 108 struct cpu *cpu = container_of(dev, struct cpu, dev); \ 109 unsigned long val; \ 110 int ret = sscanf(buf, "%lx", &val); \ 111 if (ret != 1) \ 112 return -EINVAL; \ 113 smp_call_function_single(cpu->dev.id, write_##NAME, &val, 1); \ 114 return count; \ 115 } 116 117 #define SYSFS_PMCSETUP(NAME, ADDRESS) \ 118 __SYSFS_SPRSETUP_READ_WRITE(NAME, ADDRESS, ppc_enable_pmcs()) \ 119 __SYSFS_SPRSETUP_SHOW_STORE(NAME) 120 #define SYSFS_SPRSETUP(NAME, ADDRESS) \ 121 __SYSFS_SPRSETUP_READ_WRITE(NAME, ADDRESS, ) \ 122 __SYSFS_SPRSETUP_SHOW_STORE(NAME) 123 124 #define SYSFS_SPRSETUP_SHOW_STORE(NAME) \ 125 __SYSFS_SPRSETUP_SHOW_STORE(NAME) 126 127 #ifdef CONFIG_PPC64 128 129 /* 130 * This is the system wide DSCR register default value. Any 131 * change to this default value through the sysfs interface 132 * will update all per cpu DSCR default values across the 133 * system stored in their respective PACA structures. 134 */ 135 static unsigned long dscr_default; 136 137 /** 138 * read_dscr() - Fetch the cpu specific DSCR default 139 * @val: Returned cpu specific DSCR default value 140 * 141 * This function returns the per cpu DSCR default value 142 * for any cpu which is contained in it's PACA structure. 143 */ 144 static void read_dscr(void *val) 145 { 146 *(unsigned long *)val = get_paca()->dscr_default; 147 } 148 149 150 /** 151 * write_dscr() - Update the cpu specific DSCR default 152 * @val: New cpu specific DSCR default value to update 153 * 154 * This function updates the per cpu DSCR default value 155 * for any cpu which is contained in it's PACA structure. 156 */ 157 static void write_dscr(void *val) 158 { 159 get_paca()->dscr_default = *(unsigned long *)val; 160 if (!current->thread.dscr_inherit) { 161 current->thread.dscr = *(unsigned long *)val; 162 mtspr(SPRN_DSCR, *(unsigned long *)val); 163 } 164 } 165 166 SYSFS_SPRSETUP_SHOW_STORE(dscr); 167 static DEVICE_ATTR(dscr, 0600, show_dscr, store_dscr); 168 169 static void add_write_permission_dev_attr(struct device_attribute *attr) 170 { 171 attr->attr.mode |= 0200; 172 } 173 174 /** 175 * show_dscr_default() - Fetch the system wide DSCR default 176 * @dev: Device structure 177 * @attr: Device attribute structure 178 * @buf: Interface buffer 179 * 180 * This function returns the system wide DSCR default value. 181 */ 182 static ssize_t show_dscr_default(struct device *dev, 183 struct device_attribute *attr, char *buf) 184 { 185 return sprintf(buf, "%lx\n", dscr_default); 186 } 187 188 /** 189 * store_dscr_default() - Update the system wide DSCR default 190 * @dev: Device structure 191 * @attr: Device attribute structure 192 * @buf: Interface buffer 193 * @count: Size of the update 194 * 195 * This function updates the system wide DSCR default value. 196 */ 197 static ssize_t __used store_dscr_default(struct device *dev, 198 struct device_attribute *attr, const char *buf, 199 size_t count) 200 { 201 unsigned long val; 202 int ret = 0; 203 204 ret = sscanf(buf, "%lx", &val); 205 if (ret != 1) 206 return -EINVAL; 207 dscr_default = val; 208 209 on_each_cpu(write_dscr, &val, 1); 210 211 return count; 212 } 213 214 static DEVICE_ATTR(dscr_default, 0600, 215 show_dscr_default, store_dscr_default); 216 217 static void __init sysfs_create_dscr_default(void) 218 { 219 if (cpu_has_feature(CPU_FTR_DSCR)) { 220 int cpu; 221 222 dscr_default = spr_default_dscr; 223 for_each_possible_cpu(cpu) 224 paca_ptrs[cpu]->dscr_default = dscr_default; 225 226 device_create_file(cpu_subsys.dev_root, &dev_attr_dscr_default); 227 } 228 } 229 #endif /* CONFIG_PPC64 */ 230 231 #ifdef CONFIG_PPC_E500 232 #define MAX_BIT 63 233 234 static u64 pw20_wt; 235 static u64 altivec_idle_wt; 236 237 static unsigned int get_idle_ticks_bit(u64 ns) 238 { 239 u64 cycle; 240 241 if (ns >= 10000) 242 cycle = div_u64(ns + 500, 1000) * tb_ticks_per_usec; 243 else 244 cycle = div_u64(ns * tb_ticks_per_usec, 1000); 245 246 if (!cycle) 247 return 0; 248 249 return ilog2(cycle); 250 } 251 252 static void do_show_pwrmgtcr0(void *val) 253 { 254 u32 *value = val; 255 256 *value = mfspr(SPRN_PWRMGTCR0); 257 } 258 259 static ssize_t show_pw20_state(struct device *dev, 260 struct device_attribute *attr, char *buf) 261 { 262 u32 value; 263 unsigned int cpu = dev->id; 264 265 smp_call_function_single(cpu, do_show_pwrmgtcr0, &value, 1); 266 267 value &= PWRMGTCR0_PW20_WAIT; 268 269 return sprintf(buf, "%u\n", value ? 1 : 0); 270 } 271 272 static void do_store_pw20_state(void *val) 273 { 274 u32 *value = val; 275 u32 pw20_state; 276 277 pw20_state = mfspr(SPRN_PWRMGTCR0); 278 279 if (*value) 280 pw20_state |= PWRMGTCR0_PW20_WAIT; 281 else 282 pw20_state &= ~PWRMGTCR0_PW20_WAIT; 283 284 mtspr(SPRN_PWRMGTCR0, pw20_state); 285 } 286 287 static ssize_t store_pw20_state(struct device *dev, 288 struct device_attribute *attr, 289 const char *buf, size_t count) 290 { 291 u32 value; 292 unsigned int cpu = dev->id; 293 294 if (kstrtou32(buf, 0, &value)) 295 return -EINVAL; 296 297 if (value > 1) 298 return -EINVAL; 299 300 smp_call_function_single(cpu, do_store_pw20_state, &value, 1); 301 302 return count; 303 } 304 305 static ssize_t show_pw20_wait_time(struct device *dev, 306 struct device_attribute *attr, char *buf) 307 { 308 u32 value; 309 u64 tb_cycle = 1; 310 u64 time; 311 312 unsigned int cpu = dev->id; 313 314 if (!pw20_wt) { 315 smp_call_function_single(cpu, do_show_pwrmgtcr0, &value, 1); 316 value = (value & PWRMGTCR0_PW20_ENT) >> 317 PWRMGTCR0_PW20_ENT_SHIFT; 318 319 tb_cycle = (tb_cycle << (MAX_BIT - value + 1)); 320 /* convert ms to ns */ 321 if (tb_ticks_per_usec > 1000) { 322 time = div_u64(tb_cycle, tb_ticks_per_usec / 1000); 323 } else { 324 u32 rem_us; 325 326 time = div_u64_rem(tb_cycle, tb_ticks_per_usec, 327 &rem_us); 328 time = time * 1000 + rem_us * 1000 / tb_ticks_per_usec; 329 } 330 } else { 331 time = pw20_wt; 332 } 333 334 return sprintf(buf, "%llu\n", time > 0 ? time : 0); 335 } 336 337 static void set_pw20_wait_entry_bit(void *val) 338 { 339 u32 *value = val; 340 u32 pw20_idle; 341 342 pw20_idle = mfspr(SPRN_PWRMGTCR0); 343 344 /* Set Automatic PW20 Core Idle Count */ 345 /* clear count */ 346 pw20_idle &= ~PWRMGTCR0_PW20_ENT; 347 348 /* set count */ 349 pw20_idle |= ((MAX_BIT - *value) << PWRMGTCR0_PW20_ENT_SHIFT); 350 351 mtspr(SPRN_PWRMGTCR0, pw20_idle); 352 } 353 354 static ssize_t store_pw20_wait_time(struct device *dev, 355 struct device_attribute *attr, 356 const char *buf, size_t count) 357 { 358 u32 entry_bit; 359 u64 value; 360 361 unsigned int cpu = dev->id; 362 363 if (kstrtou64(buf, 0, &value)) 364 return -EINVAL; 365 366 if (!value) 367 return -EINVAL; 368 369 entry_bit = get_idle_ticks_bit(value); 370 if (entry_bit > MAX_BIT) 371 return -EINVAL; 372 373 pw20_wt = value; 374 375 smp_call_function_single(cpu, set_pw20_wait_entry_bit, 376 &entry_bit, 1); 377 378 return count; 379 } 380 381 static ssize_t show_altivec_idle(struct device *dev, 382 struct device_attribute *attr, char *buf) 383 { 384 u32 value; 385 unsigned int cpu = dev->id; 386 387 smp_call_function_single(cpu, do_show_pwrmgtcr0, &value, 1); 388 389 value &= PWRMGTCR0_AV_IDLE_PD_EN; 390 391 return sprintf(buf, "%u\n", value ? 1 : 0); 392 } 393 394 static void do_store_altivec_idle(void *val) 395 { 396 u32 *value = val; 397 u32 altivec_idle; 398 399 altivec_idle = mfspr(SPRN_PWRMGTCR0); 400 401 if (*value) 402 altivec_idle |= PWRMGTCR0_AV_IDLE_PD_EN; 403 else 404 altivec_idle &= ~PWRMGTCR0_AV_IDLE_PD_EN; 405 406 mtspr(SPRN_PWRMGTCR0, altivec_idle); 407 } 408 409 static ssize_t store_altivec_idle(struct device *dev, 410 struct device_attribute *attr, 411 const char *buf, size_t count) 412 { 413 u32 value; 414 unsigned int cpu = dev->id; 415 416 if (kstrtou32(buf, 0, &value)) 417 return -EINVAL; 418 419 if (value > 1) 420 return -EINVAL; 421 422 smp_call_function_single(cpu, do_store_altivec_idle, &value, 1); 423 424 return count; 425 } 426 427 static ssize_t show_altivec_idle_wait_time(struct device *dev, 428 struct device_attribute *attr, char *buf) 429 { 430 u32 value; 431 u64 tb_cycle = 1; 432 u64 time; 433 434 unsigned int cpu = dev->id; 435 436 if (!altivec_idle_wt) { 437 smp_call_function_single(cpu, do_show_pwrmgtcr0, &value, 1); 438 value = (value & PWRMGTCR0_AV_IDLE_CNT) >> 439 PWRMGTCR0_AV_IDLE_CNT_SHIFT; 440 441 tb_cycle = (tb_cycle << (MAX_BIT - value + 1)); 442 /* convert ms to ns */ 443 if (tb_ticks_per_usec > 1000) { 444 time = div_u64(tb_cycle, tb_ticks_per_usec / 1000); 445 } else { 446 u32 rem_us; 447 448 time = div_u64_rem(tb_cycle, tb_ticks_per_usec, 449 &rem_us); 450 time = time * 1000 + rem_us * 1000 / tb_ticks_per_usec; 451 } 452 } else { 453 time = altivec_idle_wt; 454 } 455 456 return sprintf(buf, "%llu\n", time > 0 ? time : 0); 457 } 458 459 static void set_altivec_idle_wait_entry_bit(void *val) 460 { 461 u32 *value = val; 462 u32 altivec_idle; 463 464 altivec_idle = mfspr(SPRN_PWRMGTCR0); 465 466 /* Set Automatic AltiVec Idle Count */ 467 /* clear count */ 468 altivec_idle &= ~PWRMGTCR0_AV_IDLE_CNT; 469 470 /* set count */ 471 altivec_idle |= ((MAX_BIT - *value) << PWRMGTCR0_AV_IDLE_CNT_SHIFT); 472 473 mtspr(SPRN_PWRMGTCR0, altivec_idle); 474 } 475 476 static ssize_t store_altivec_idle_wait_time(struct device *dev, 477 struct device_attribute *attr, 478 const char *buf, size_t count) 479 { 480 u32 entry_bit; 481 u64 value; 482 483 unsigned int cpu = dev->id; 484 485 if (kstrtou64(buf, 0, &value)) 486 return -EINVAL; 487 488 if (!value) 489 return -EINVAL; 490 491 entry_bit = get_idle_ticks_bit(value); 492 if (entry_bit > MAX_BIT) 493 return -EINVAL; 494 495 altivec_idle_wt = value; 496 497 smp_call_function_single(cpu, set_altivec_idle_wait_entry_bit, 498 &entry_bit, 1); 499 500 return count; 501 } 502 503 /* 504 * Enable/Disable interface: 505 * 0, disable. 1, enable. 506 */ 507 static DEVICE_ATTR(pw20_state, 0600, show_pw20_state, store_pw20_state); 508 static DEVICE_ATTR(altivec_idle, 0600, show_altivec_idle, store_altivec_idle); 509 510 /* 511 * Set wait time interface:(Nanosecond) 512 * Example: Base on TBfreq is 41MHZ. 513 * 1~48(ns): TB[63] 514 * 49~97(ns): TB[62] 515 * 98~195(ns): TB[61] 516 * 196~390(ns): TB[60] 517 * 391~780(ns): TB[59] 518 * 781~1560(ns): TB[58] 519 * ... 520 */ 521 static DEVICE_ATTR(pw20_wait_time, 0600, 522 show_pw20_wait_time, 523 store_pw20_wait_time); 524 static DEVICE_ATTR(altivec_idle_wait_time, 0600, 525 show_altivec_idle_wait_time, 526 store_altivec_idle_wait_time); 527 #endif 528 529 /* 530 * Enabling PMCs will slow partition context switch times so we only do 531 * it the first time we write to the PMCs. 532 */ 533 534 static DEFINE_PER_CPU(char, pmcs_enabled); 535 536 void ppc_enable_pmcs(void) 537 { 538 ppc_set_pmu_inuse(1); 539 540 /* Only need to enable them once */ 541 if (__this_cpu_read(pmcs_enabled)) 542 return; 543 544 __this_cpu_write(pmcs_enabled, 1); 545 546 if (ppc_md.enable_pmcs) 547 ppc_md.enable_pmcs(); 548 } 549 EXPORT_SYMBOL(ppc_enable_pmcs); 550 551 552 553 /* Let's define all possible registers, we'll only hook up the ones 554 * that are implemented on the current processor 555 */ 556 557 #ifdef CONFIG_PMU_SYSFS 558 #if defined(CONFIG_PPC64) || defined(CONFIG_PPC_BOOK3S_32) 559 #define HAS_PPC_PMC_CLASSIC 1 560 #define HAS_PPC_PMC_IBM 1 561 #endif 562 563 #ifdef CONFIG_PPC64 564 #define HAS_PPC_PMC_PA6T 1 565 #define HAS_PPC_PMC56 1 566 #endif 567 568 #ifdef CONFIG_PPC_BOOK3S_32 569 #define HAS_PPC_PMC_G4 1 570 #endif 571 #endif /* CONFIG_PMU_SYSFS */ 572 573 #if defined(CONFIG_PPC64) && defined(CONFIG_DEBUG_MISC) 574 #define HAS_PPC_PA6T 575 #endif 576 /* 577 * SPRs which are not related to PMU. 578 */ 579 #ifdef CONFIG_PPC64 580 SYSFS_SPRSETUP(purr, SPRN_PURR); 581 SYSFS_SPRSETUP(spurr, SPRN_SPURR); 582 SYSFS_SPRSETUP(pir, SPRN_PIR); 583 SYSFS_SPRSETUP(tscr, SPRN_TSCR); 584 585 /* 586 Lets only enable read for phyp resources and 587 enable write when needed with a separate function. 588 Lets be conservative and default to pseries. 589 */ 590 static DEVICE_ATTR(spurr, 0400, show_spurr, NULL); 591 static DEVICE_ATTR(purr, 0400, show_purr, store_purr); 592 static DEVICE_ATTR(pir, 0400, show_pir, NULL); 593 static DEVICE_ATTR(tscr, 0600, show_tscr, store_tscr); 594 #endif /* CONFIG_PPC64 */ 595 596 #ifdef HAS_PPC_PMC_CLASSIC 597 SYSFS_PMCSETUP(mmcr0, SPRN_MMCR0); 598 SYSFS_PMCSETUP(mmcr1, SPRN_MMCR1); 599 SYSFS_PMCSETUP(pmc1, SPRN_PMC1); 600 SYSFS_PMCSETUP(pmc2, SPRN_PMC2); 601 SYSFS_PMCSETUP(pmc3, SPRN_PMC3); 602 SYSFS_PMCSETUP(pmc4, SPRN_PMC4); 603 SYSFS_PMCSETUP(pmc5, SPRN_PMC5); 604 SYSFS_PMCSETUP(pmc6, SPRN_PMC6); 605 #endif 606 607 #ifdef HAS_PPC_PMC_G4 608 SYSFS_PMCSETUP(mmcr2, SPRN_MMCR2); 609 #endif 610 611 #ifdef HAS_PPC_PMC56 612 SYSFS_PMCSETUP(pmc7, SPRN_PMC7); 613 SYSFS_PMCSETUP(pmc8, SPRN_PMC8); 614 615 SYSFS_PMCSETUP(mmcra, SPRN_MMCRA); 616 SYSFS_PMCSETUP(mmcr3, SPRN_MMCR3); 617 618 static DEVICE_ATTR(mmcra, 0600, show_mmcra, store_mmcra); 619 static DEVICE_ATTR(mmcr3, 0600, show_mmcr3, store_mmcr3); 620 #endif /* HAS_PPC_PMC56 */ 621 622 623 624 625 #ifdef HAS_PPC_PMC_PA6T 626 SYSFS_PMCSETUP(pa6t_pmc0, SPRN_PA6T_PMC0); 627 SYSFS_PMCSETUP(pa6t_pmc1, SPRN_PA6T_PMC1); 628 SYSFS_PMCSETUP(pa6t_pmc2, SPRN_PA6T_PMC2); 629 SYSFS_PMCSETUP(pa6t_pmc3, SPRN_PA6T_PMC3); 630 SYSFS_PMCSETUP(pa6t_pmc4, SPRN_PA6T_PMC4); 631 SYSFS_PMCSETUP(pa6t_pmc5, SPRN_PA6T_PMC5); 632 #endif 633 634 #ifdef HAS_PPC_PA6T 635 SYSFS_SPRSETUP(hid0, SPRN_HID0); 636 SYSFS_SPRSETUP(hid1, SPRN_HID1); 637 SYSFS_SPRSETUP(hid4, SPRN_HID4); 638 SYSFS_SPRSETUP(hid5, SPRN_HID5); 639 SYSFS_SPRSETUP(ima0, SPRN_PA6T_IMA0); 640 SYSFS_SPRSETUP(ima1, SPRN_PA6T_IMA1); 641 SYSFS_SPRSETUP(ima2, SPRN_PA6T_IMA2); 642 SYSFS_SPRSETUP(ima3, SPRN_PA6T_IMA3); 643 SYSFS_SPRSETUP(ima4, SPRN_PA6T_IMA4); 644 SYSFS_SPRSETUP(ima5, SPRN_PA6T_IMA5); 645 SYSFS_SPRSETUP(ima6, SPRN_PA6T_IMA6); 646 SYSFS_SPRSETUP(ima7, SPRN_PA6T_IMA7); 647 SYSFS_SPRSETUP(ima8, SPRN_PA6T_IMA8); 648 SYSFS_SPRSETUP(ima9, SPRN_PA6T_IMA9); 649 SYSFS_SPRSETUP(imaat, SPRN_PA6T_IMAAT); 650 SYSFS_SPRSETUP(btcr, SPRN_PA6T_BTCR); 651 SYSFS_SPRSETUP(pccr, SPRN_PA6T_PCCR); 652 SYSFS_SPRSETUP(rpccr, SPRN_PA6T_RPCCR); 653 SYSFS_SPRSETUP(der, SPRN_PA6T_DER); 654 SYSFS_SPRSETUP(mer, SPRN_PA6T_MER); 655 SYSFS_SPRSETUP(ber, SPRN_PA6T_BER); 656 SYSFS_SPRSETUP(ier, SPRN_PA6T_IER); 657 SYSFS_SPRSETUP(sier, SPRN_PA6T_SIER); 658 SYSFS_SPRSETUP(siar, SPRN_PA6T_SIAR); 659 SYSFS_SPRSETUP(tsr0, SPRN_PA6T_TSR0); 660 SYSFS_SPRSETUP(tsr1, SPRN_PA6T_TSR1); 661 SYSFS_SPRSETUP(tsr2, SPRN_PA6T_TSR2); 662 SYSFS_SPRSETUP(tsr3, SPRN_PA6T_TSR3); 663 #endif /* HAS_PPC_PA6T */ 664 665 #ifdef HAS_PPC_PMC_IBM 666 static struct device_attribute ibm_common_attrs[] = { 667 __ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0), 668 __ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1), 669 }; 670 #endif /* HAS_PPC_PMC_IBM */ 671 672 #ifdef HAS_PPC_PMC_G4 673 static struct device_attribute g4_common_attrs[] = { 674 __ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0), 675 __ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1), 676 __ATTR(mmcr2, 0600, show_mmcr2, store_mmcr2), 677 }; 678 #endif /* HAS_PPC_PMC_G4 */ 679 680 #ifdef HAS_PPC_PMC_CLASSIC 681 static struct device_attribute classic_pmc_attrs[] = { 682 __ATTR(pmc1, 0600, show_pmc1, store_pmc1), 683 __ATTR(pmc2, 0600, show_pmc2, store_pmc2), 684 __ATTR(pmc3, 0600, show_pmc3, store_pmc3), 685 __ATTR(pmc4, 0600, show_pmc4, store_pmc4), 686 __ATTR(pmc5, 0600, show_pmc5, store_pmc5), 687 __ATTR(pmc6, 0600, show_pmc6, store_pmc6), 688 #ifdef HAS_PPC_PMC56 689 __ATTR(pmc7, 0600, show_pmc7, store_pmc7), 690 __ATTR(pmc8, 0600, show_pmc8, store_pmc8), 691 #endif 692 }; 693 #endif 694 695 #if defined(HAS_PPC_PMC_PA6T) || defined(HAS_PPC_PA6T) 696 static struct device_attribute pa6t_attrs[] = { 697 #ifdef HAS_PPC_PMC_PA6T 698 __ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0), 699 __ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1), 700 __ATTR(pmc0, 0600, show_pa6t_pmc0, store_pa6t_pmc0), 701 __ATTR(pmc1, 0600, show_pa6t_pmc1, store_pa6t_pmc1), 702 __ATTR(pmc2, 0600, show_pa6t_pmc2, store_pa6t_pmc2), 703 __ATTR(pmc3, 0600, show_pa6t_pmc3, store_pa6t_pmc3), 704 __ATTR(pmc4, 0600, show_pa6t_pmc4, store_pa6t_pmc4), 705 __ATTR(pmc5, 0600, show_pa6t_pmc5, store_pa6t_pmc5), 706 #endif 707 #ifdef HAS_PPC_PA6T 708 __ATTR(hid0, 0600, show_hid0, store_hid0), 709 __ATTR(hid1, 0600, show_hid1, store_hid1), 710 __ATTR(hid4, 0600, show_hid4, store_hid4), 711 __ATTR(hid5, 0600, show_hid5, store_hid5), 712 __ATTR(ima0, 0600, show_ima0, store_ima0), 713 __ATTR(ima1, 0600, show_ima1, store_ima1), 714 __ATTR(ima2, 0600, show_ima2, store_ima2), 715 __ATTR(ima3, 0600, show_ima3, store_ima3), 716 __ATTR(ima4, 0600, show_ima4, store_ima4), 717 __ATTR(ima5, 0600, show_ima5, store_ima5), 718 __ATTR(ima6, 0600, show_ima6, store_ima6), 719 __ATTR(ima7, 0600, show_ima7, store_ima7), 720 __ATTR(ima8, 0600, show_ima8, store_ima8), 721 __ATTR(ima9, 0600, show_ima9, store_ima9), 722 __ATTR(imaat, 0600, show_imaat, store_imaat), 723 __ATTR(btcr, 0600, show_btcr, store_btcr), 724 __ATTR(pccr, 0600, show_pccr, store_pccr), 725 __ATTR(rpccr, 0600, show_rpccr, store_rpccr), 726 __ATTR(der, 0600, show_der, store_der), 727 __ATTR(mer, 0600, show_mer, store_mer), 728 __ATTR(ber, 0600, show_ber, store_ber), 729 __ATTR(ier, 0600, show_ier, store_ier), 730 __ATTR(sier, 0600, show_sier, store_sier), 731 __ATTR(siar, 0600, show_siar, store_siar), 732 __ATTR(tsr0, 0600, show_tsr0, store_tsr0), 733 __ATTR(tsr1, 0600, show_tsr1, store_tsr1), 734 __ATTR(tsr2, 0600, show_tsr2, store_tsr2), 735 __ATTR(tsr3, 0600, show_tsr3, store_tsr3), 736 #endif /* HAS_PPC_PA6T */ 737 }; 738 #endif 739 740 #ifdef CONFIG_PPC_SVM 741 static ssize_t show_svm(struct device *dev, struct device_attribute *attr, char *buf) 742 { 743 return sprintf(buf, "%u\n", is_secure_guest()); 744 } 745 static DEVICE_ATTR(svm, 0444, show_svm, NULL); 746 747 static void __init create_svm_file(void) 748 { 749 device_create_file(cpu_subsys.dev_root, &dev_attr_svm); 750 } 751 #else 752 static void __init create_svm_file(void) 753 { 754 } 755 #endif /* CONFIG_PPC_SVM */ 756 757 #ifdef CONFIG_PPC_PSERIES 758 static void read_idle_purr(void *val) 759 { 760 u64 *ret = val; 761 762 *ret = read_this_idle_purr(); 763 } 764 765 static ssize_t idle_purr_show(struct device *dev, 766 struct device_attribute *attr, char *buf) 767 { 768 struct cpu *cpu = container_of(dev, struct cpu, dev); 769 u64 val; 770 771 smp_call_function_single(cpu->dev.id, read_idle_purr, &val, 1); 772 return sprintf(buf, "%llx\n", val); 773 } 774 static DEVICE_ATTR(idle_purr, 0400, idle_purr_show, NULL); 775 776 static void create_idle_purr_file(struct device *s) 777 { 778 if (firmware_has_feature(FW_FEATURE_LPAR)) 779 device_create_file(s, &dev_attr_idle_purr); 780 } 781 782 static void remove_idle_purr_file(struct device *s) 783 { 784 if (firmware_has_feature(FW_FEATURE_LPAR)) 785 device_remove_file(s, &dev_attr_idle_purr); 786 } 787 788 static void read_idle_spurr(void *val) 789 { 790 u64 *ret = val; 791 792 *ret = read_this_idle_spurr(); 793 } 794 795 static ssize_t idle_spurr_show(struct device *dev, 796 struct device_attribute *attr, char *buf) 797 { 798 struct cpu *cpu = container_of(dev, struct cpu, dev); 799 u64 val; 800 801 smp_call_function_single(cpu->dev.id, read_idle_spurr, &val, 1); 802 return sprintf(buf, "%llx\n", val); 803 } 804 static DEVICE_ATTR(idle_spurr, 0400, idle_spurr_show, NULL); 805 806 static void create_idle_spurr_file(struct device *s) 807 { 808 if (firmware_has_feature(FW_FEATURE_LPAR)) 809 device_create_file(s, &dev_attr_idle_spurr); 810 } 811 812 static void remove_idle_spurr_file(struct device *s) 813 { 814 if (firmware_has_feature(FW_FEATURE_LPAR)) 815 device_remove_file(s, &dev_attr_idle_spurr); 816 } 817 818 #else /* CONFIG_PPC_PSERIES */ 819 #define create_idle_purr_file(s) 820 #define remove_idle_purr_file(s) 821 #define create_idle_spurr_file(s) 822 #define remove_idle_spurr_file(s) 823 #endif /* CONFIG_PPC_PSERIES */ 824 825 static int register_cpu_online(unsigned int cpu) 826 { 827 struct cpu *c = &per_cpu(cpu_devices, cpu); 828 struct device *s = &c->dev; 829 struct device_attribute *attrs, *pmc_attrs; 830 int i, nattrs; 831 832 /* For cpus present at boot a reference was already grabbed in register_cpu() */ 833 if (!s->of_node) 834 s->of_node = of_get_cpu_node(cpu, NULL); 835 836 #ifdef CONFIG_PPC64 837 if (cpu_has_feature(CPU_FTR_SMT)) 838 device_create_file(s, &dev_attr_smt_snooze_delay); 839 #endif 840 841 /* PMC stuff */ 842 switch (cur_cpu_spec->pmc_type) { 843 #ifdef HAS_PPC_PMC_IBM 844 case PPC_PMC_IBM: 845 attrs = ibm_common_attrs; 846 nattrs = ARRAY_SIZE(ibm_common_attrs); 847 pmc_attrs = classic_pmc_attrs; 848 break; 849 #endif /* HAS_PPC_PMC_IBM */ 850 #ifdef HAS_PPC_PMC_G4 851 case PPC_PMC_G4: 852 attrs = g4_common_attrs; 853 nattrs = ARRAY_SIZE(g4_common_attrs); 854 pmc_attrs = classic_pmc_attrs; 855 break; 856 #endif /* HAS_PPC_PMC_G4 */ 857 #if defined(HAS_PPC_PMC_PA6T) || defined(HAS_PPC_PA6T) 858 case PPC_PMC_PA6T: 859 /* PA Semi starts counting at PMC0 */ 860 attrs = pa6t_attrs; 861 nattrs = ARRAY_SIZE(pa6t_attrs); 862 pmc_attrs = NULL; 863 break; 864 #endif 865 default: 866 attrs = NULL; 867 nattrs = 0; 868 pmc_attrs = NULL; 869 } 870 871 for (i = 0; i < nattrs; i++) 872 device_create_file(s, &attrs[i]); 873 874 if (pmc_attrs) 875 for (i = 0; i < cur_cpu_spec->num_pmcs; i++) 876 device_create_file(s, &pmc_attrs[i]); 877 878 #ifdef CONFIG_PPC64 879 #ifdef CONFIG_PMU_SYSFS 880 if (cpu_has_feature(CPU_FTR_MMCRA)) 881 device_create_file(s, &dev_attr_mmcra); 882 883 if (cpu_has_feature(CPU_FTR_ARCH_31)) 884 device_create_file(s, &dev_attr_mmcr3); 885 #endif /* CONFIG_PMU_SYSFS */ 886 887 if (cpu_has_feature(CPU_FTR_PURR)) { 888 if (!firmware_has_feature(FW_FEATURE_LPAR)) 889 add_write_permission_dev_attr(&dev_attr_purr); 890 device_create_file(s, &dev_attr_purr); 891 create_idle_purr_file(s); 892 } 893 894 if (cpu_has_feature(CPU_FTR_SPURR)) { 895 device_create_file(s, &dev_attr_spurr); 896 create_idle_spurr_file(s); 897 } 898 899 if (cpu_has_feature(CPU_FTR_DSCR)) 900 device_create_file(s, &dev_attr_dscr); 901 902 if (cpu_has_feature(CPU_FTR_PPCAS_ARCH_V2)) 903 device_create_file(s, &dev_attr_pir); 904 905 if (cpu_has_feature(CPU_FTR_ARCH_206) && 906 !firmware_has_feature(FW_FEATURE_LPAR)) 907 device_create_file(s, &dev_attr_tscr); 908 #endif /* CONFIG_PPC64 */ 909 910 #ifdef CONFIG_PPC_E500 911 if (PVR_VER(cur_cpu_spec->pvr_value) == PVR_VER_E6500) { 912 device_create_file(s, &dev_attr_pw20_state); 913 device_create_file(s, &dev_attr_pw20_wait_time); 914 915 device_create_file(s, &dev_attr_altivec_idle); 916 device_create_file(s, &dev_attr_altivec_idle_wait_time); 917 } 918 #endif 919 cacheinfo_cpu_online(cpu); 920 return 0; 921 } 922 923 #ifdef CONFIG_HOTPLUG_CPU 924 static int unregister_cpu_online(unsigned int cpu) 925 { 926 struct cpu *c = &per_cpu(cpu_devices, cpu); 927 struct device *s = &c->dev; 928 struct device_attribute *attrs, *pmc_attrs; 929 int i, nattrs; 930 931 if (WARN_RATELIMIT(!c->hotpluggable, "cpu %d can't be offlined\n", cpu)) 932 return -EBUSY; 933 934 #ifdef CONFIG_PPC64 935 if (cpu_has_feature(CPU_FTR_SMT)) 936 device_remove_file(s, &dev_attr_smt_snooze_delay); 937 #endif 938 939 /* PMC stuff */ 940 switch (cur_cpu_spec->pmc_type) { 941 #ifdef HAS_PPC_PMC_IBM 942 case PPC_PMC_IBM: 943 attrs = ibm_common_attrs; 944 nattrs = ARRAY_SIZE(ibm_common_attrs); 945 pmc_attrs = classic_pmc_attrs; 946 break; 947 #endif /* HAS_PPC_PMC_IBM */ 948 #ifdef HAS_PPC_PMC_G4 949 case PPC_PMC_G4: 950 attrs = g4_common_attrs; 951 nattrs = ARRAY_SIZE(g4_common_attrs); 952 pmc_attrs = classic_pmc_attrs; 953 break; 954 #endif /* HAS_PPC_PMC_G4 */ 955 #if defined(HAS_PPC_PMC_PA6T) || defined(HAS_PPC_PA6T) 956 case PPC_PMC_PA6T: 957 /* PA Semi starts counting at PMC0 */ 958 attrs = pa6t_attrs; 959 nattrs = ARRAY_SIZE(pa6t_attrs); 960 pmc_attrs = NULL; 961 break; 962 #endif 963 default: 964 attrs = NULL; 965 nattrs = 0; 966 pmc_attrs = NULL; 967 } 968 969 for (i = 0; i < nattrs; i++) 970 device_remove_file(s, &attrs[i]); 971 972 if (pmc_attrs) 973 for (i = 0; i < cur_cpu_spec->num_pmcs; i++) 974 device_remove_file(s, &pmc_attrs[i]); 975 976 #ifdef CONFIG_PPC64 977 #ifdef CONFIG_PMU_SYSFS 978 if (cpu_has_feature(CPU_FTR_MMCRA)) 979 device_remove_file(s, &dev_attr_mmcra); 980 981 if (cpu_has_feature(CPU_FTR_ARCH_31)) 982 device_remove_file(s, &dev_attr_mmcr3); 983 #endif /* CONFIG_PMU_SYSFS */ 984 985 if (cpu_has_feature(CPU_FTR_PURR)) { 986 device_remove_file(s, &dev_attr_purr); 987 remove_idle_purr_file(s); 988 } 989 990 if (cpu_has_feature(CPU_FTR_SPURR)) { 991 device_remove_file(s, &dev_attr_spurr); 992 remove_idle_spurr_file(s); 993 } 994 995 if (cpu_has_feature(CPU_FTR_DSCR)) 996 device_remove_file(s, &dev_attr_dscr); 997 998 if (cpu_has_feature(CPU_FTR_PPCAS_ARCH_V2)) 999 device_remove_file(s, &dev_attr_pir); 1000 1001 if (cpu_has_feature(CPU_FTR_ARCH_206) && 1002 !firmware_has_feature(FW_FEATURE_LPAR)) 1003 device_remove_file(s, &dev_attr_tscr); 1004 #endif /* CONFIG_PPC64 */ 1005 1006 #ifdef CONFIG_PPC_E500 1007 if (PVR_VER(cur_cpu_spec->pvr_value) == PVR_VER_E6500) { 1008 device_remove_file(s, &dev_attr_pw20_state); 1009 device_remove_file(s, &dev_attr_pw20_wait_time); 1010 1011 device_remove_file(s, &dev_attr_altivec_idle); 1012 device_remove_file(s, &dev_attr_altivec_idle_wait_time); 1013 } 1014 #endif 1015 cacheinfo_cpu_offline(cpu); 1016 of_node_put(s->of_node); 1017 s->of_node = NULL; 1018 return 0; 1019 } 1020 #else /* !CONFIG_HOTPLUG_CPU */ 1021 #define unregister_cpu_online NULL 1022 #endif 1023 1024 #ifdef CONFIG_ARCH_CPU_PROBE_RELEASE 1025 ssize_t arch_cpu_probe(const char *buf, size_t count) 1026 { 1027 if (ppc_md.cpu_probe) 1028 return ppc_md.cpu_probe(buf, count); 1029 1030 return -EINVAL; 1031 } 1032 1033 ssize_t arch_cpu_release(const char *buf, size_t count) 1034 { 1035 if (ppc_md.cpu_release) 1036 return ppc_md.cpu_release(buf, count); 1037 1038 return -EINVAL; 1039 } 1040 #endif /* CONFIG_ARCH_CPU_PROBE_RELEASE */ 1041 1042 static DEFINE_MUTEX(cpu_mutex); 1043 1044 int cpu_add_dev_attr(struct device_attribute *attr) 1045 { 1046 int cpu; 1047 1048 mutex_lock(&cpu_mutex); 1049 1050 for_each_possible_cpu(cpu) { 1051 device_create_file(get_cpu_device(cpu), attr); 1052 } 1053 1054 mutex_unlock(&cpu_mutex); 1055 return 0; 1056 } 1057 EXPORT_SYMBOL_GPL(cpu_add_dev_attr); 1058 1059 int cpu_add_dev_attr_group(struct attribute_group *attrs) 1060 { 1061 int cpu; 1062 struct device *dev; 1063 int ret; 1064 1065 mutex_lock(&cpu_mutex); 1066 1067 for_each_possible_cpu(cpu) { 1068 dev = get_cpu_device(cpu); 1069 ret = sysfs_create_group(&dev->kobj, attrs); 1070 WARN_ON(ret != 0); 1071 } 1072 1073 mutex_unlock(&cpu_mutex); 1074 return 0; 1075 } 1076 EXPORT_SYMBOL_GPL(cpu_add_dev_attr_group); 1077 1078 1079 void cpu_remove_dev_attr(struct device_attribute *attr) 1080 { 1081 int cpu; 1082 1083 mutex_lock(&cpu_mutex); 1084 1085 for_each_possible_cpu(cpu) { 1086 device_remove_file(get_cpu_device(cpu), attr); 1087 } 1088 1089 mutex_unlock(&cpu_mutex); 1090 } 1091 EXPORT_SYMBOL_GPL(cpu_remove_dev_attr); 1092 1093 void cpu_remove_dev_attr_group(struct attribute_group *attrs) 1094 { 1095 int cpu; 1096 struct device *dev; 1097 1098 mutex_lock(&cpu_mutex); 1099 1100 for_each_possible_cpu(cpu) { 1101 dev = get_cpu_device(cpu); 1102 sysfs_remove_group(&dev->kobj, attrs); 1103 } 1104 1105 mutex_unlock(&cpu_mutex); 1106 } 1107 EXPORT_SYMBOL_GPL(cpu_remove_dev_attr_group); 1108 1109 1110 /* NUMA stuff */ 1111 1112 #ifdef CONFIG_NUMA 1113 int sysfs_add_device_to_node(struct device *dev, int nid) 1114 { 1115 struct node *node = node_devices[nid]; 1116 return sysfs_create_link(&node->dev.kobj, &dev->kobj, 1117 kobject_name(&dev->kobj)); 1118 } 1119 EXPORT_SYMBOL_GPL(sysfs_add_device_to_node); 1120 1121 void sysfs_remove_device_from_node(struct device *dev, int nid) 1122 { 1123 struct node *node = node_devices[nid]; 1124 sysfs_remove_link(&node->dev.kobj, kobject_name(&dev->kobj)); 1125 } 1126 EXPORT_SYMBOL_GPL(sysfs_remove_device_from_node); 1127 #endif 1128 1129 /* Only valid if CPU is present. */ 1130 static ssize_t show_physical_id(struct device *dev, 1131 struct device_attribute *attr, char *buf) 1132 { 1133 struct cpu *cpu = container_of(dev, struct cpu, dev); 1134 1135 return sprintf(buf, "%d\n", get_hard_smp_processor_id(cpu->dev.id)); 1136 } 1137 static DEVICE_ATTR(physical_id, 0444, show_physical_id, NULL); 1138 1139 static int __init topology_init(void) 1140 { 1141 int cpu, r; 1142 1143 for_each_possible_cpu(cpu) { 1144 struct cpu *c = &per_cpu(cpu_devices, cpu); 1145 1146 #ifdef CONFIG_HOTPLUG_CPU 1147 /* 1148 * For now, we just see if the system supports making 1149 * the RTAS calls for CPU hotplug. But, there may be a 1150 * more comprehensive way to do this for an individual 1151 * CPU. For instance, the boot cpu might never be valid 1152 * for hotplugging. 1153 */ 1154 if (smp_ops && smp_ops->cpu_offline_self) 1155 c->hotpluggable = 1; 1156 #endif 1157 1158 if (cpu_online(cpu) || c->hotpluggable) { 1159 register_cpu(c, cpu); 1160 1161 device_create_file(&c->dev, &dev_attr_physical_id); 1162 } 1163 } 1164 r = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "powerpc/topology:online", 1165 register_cpu_online, unregister_cpu_online); 1166 WARN_ON(r < 0); 1167 #ifdef CONFIG_PPC64 1168 sysfs_create_dscr_default(); 1169 #endif /* CONFIG_PPC64 */ 1170 1171 create_svm_file(); 1172 1173 return 0; 1174 } 1175 subsys_initcall(topology_init); 1176