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
store_smt_snooze_delay(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)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
show_smt_snooze_delay(struct device * dev,struct device_attribute * attr,char * buf)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
setup_smt_snooze_delay(char * str)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 */
read_dscr(void * val)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 */
write_dscr(void * val)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
add_write_permission_dev_attr(struct device_attribute * attr)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 */
show_dscr_default(struct device * dev,struct device_attribute * attr,char * buf)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 */
store_dscr_default(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)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
sysfs_create_dscr_default(void)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
get_idle_ticks_bit(u64 ns)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
do_show_pwrmgtcr0(void * val)252 static void do_show_pwrmgtcr0(void *val)
253 {
254 u32 *value = val;
255
256 *value = mfspr(SPRN_PWRMGTCR0);
257 }
258
show_pw20_state(struct device * dev,struct device_attribute * attr,char * buf)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
do_store_pw20_state(void * val)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
store_pw20_state(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)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
show_pw20_wait_time(struct device * dev,struct device_attribute * attr,char * buf)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
set_pw20_wait_entry_bit(void * val)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
store_pw20_wait_time(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)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
show_altivec_idle(struct device * dev,struct device_attribute * attr,char * buf)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
do_store_altivec_idle(void * val)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
store_altivec_idle(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)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
show_altivec_idle_wait_time(struct device * dev,struct device_attribute * attr,char * buf)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
set_altivec_idle_wait_entry_bit(void * val)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
store_altivec_idle_wait_time(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)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
ppc_enable_pmcs(void)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
show_svm(struct device * dev,struct device_attribute * attr,char * buf)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
create_svm_file(void)747 static void __init create_svm_file(void)
748 {
749 device_create_file(cpu_subsys.dev_root, &dev_attr_svm);
750 }
751 #else
create_svm_file(void)752 static void __init create_svm_file(void)
753 {
754 }
755 #endif /* CONFIG_PPC_SVM */
756
757 #ifdef CONFIG_PPC_PSERIES
read_idle_purr(void * val)758 static void read_idle_purr(void *val)
759 {
760 u64 *ret = val;
761
762 *ret = read_this_idle_purr();
763 }
764
idle_purr_show(struct device * dev,struct device_attribute * attr,char * buf)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
create_idle_purr_file(struct device * s)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
remove_idle_purr_file(struct device * s)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
read_idle_spurr(void * val)788 static void read_idle_spurr(void *val)
789 {
790 u64 *ret = val;
791
792 *ret = read_this_idle_spurr();
793 }
794
idle_spurr_show(struct device * dev,struct device_attribute * attr,char * buf)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
create_idle_spurr_file(struct device * s)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
remove_idle_spurr_file(struct device * s)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
register_cpu_online(unsigned int cpu)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
unregister_cpu_online(unsigned int 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
arch_cpu_probe(const char * buf,size_t count)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
arch_cpu_release(const char * buf,size_t count)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
cpu_add_dev_attr(struct device_attribute * attr)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
cpu_add_dev_attr_group(struct attribute_group * attrs)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
cpu_remove_dev_attr(struct device_attribute * attr)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
cpu_remove_dev_attr_group(struct attribute_group * attrs)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
sysfs_add_device_to_node(struct device * dev,int nid)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
sysfs_remove_device_from_node(struct device * dev,int nid)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. */
show_physical_id(struct device * dev,struct device_attribute * attr,char * buf)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
topology_init(void)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