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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
13#include <asm/current.h>
14#include <asm/processor.h>
15#include <asm/cputable.h>
16#include <asm/hvcall.h>
17#include <asm/prom.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
33static DEFINE_PER_CPU(struct cpu, cpu_devices);
34
35/*
36 * SMT snooze delay stuff, 64-bit only for now
37 */
38
39#ifdef CONFIG_PPC64
40
41/* Time in microseconds we delay before sleeping in the idle loop */
42static DEFINE_PER_CPU(long, smt_snooze_delay) = { 100 };
43
44static ssize_t store_smt_snooze_delay(struct device *dev,
45 struct device_attribute *attr,
46 const char *buf,
47 size_t count)
48{
49 struct cpu *cpu = container_of(dev, struct cpu, dev);
50 ssize_t ret;
51 long snooze;
52
53 ret = sscanf(buf, "%ld", &snooze);
54 if (ret != 1)
55 return -EINVAL;
56
57 per_cpu(smt_snooze_delay, cpu->dev.id) = snooze;
58 return count;
59}
60
61static ssize_t show_smt_snooze_delay(struct device *dev,
62 struct device_attribute *attr,
63 char *buf)
64{
65 struct cpu *cpu = container_of(dev, struct cpu, dev);
66
67 return sprintf(buf, "%ld\n", per_cpu(smt_snooze_delay, cpu->dev.id));
68}
69
70static DEVICE_ATTR(smt_snooze_delay, 0644, show_smt_snooze_delay,
71 store_smt_snooze_delay);
72
73static int __init setup_smt_snooze_delay(char *str)
74{
75 unsigned int cpu;
76 long snooze;
77
78 if (!cpu_has_feature(CPU_FTR_SMT))
79 return 1;
80
81 snooze = simple_strtol(str, NULL, 10);
82 for_each_possible_cpu(cpu)
83 per_cpu(smt_snooze_delay, cpu) = snooze;
84
85 return 1;
86}
87__setup("smt-snooze-delay=", setup_smt_snooze_delay);
88
89#endif /* CONFIG_PPC64 */
90
91#define __SYSFS_SPRSETUP_READ_WRITE(NAME, ADDRESS, EXTRA) \
92static void read_##NAME(void *val) \
93{ \
94 *(unsigned long *)val = mfspr(ADDRESS); \
95} \
96static void write_##NAME(void *val) \
97{ \
98 EXTRA; \
99 mtspr(ADDRESS, *(unsigned long *)val); \
100}
101
102#define __SYSFS_SPRSETUP_SHOW_STORE(NAME) \
103static ssize_t show_##NAME(struct device *dev, \
104 struct device_attribute *attr, \
105 char *buf) \
106{ \
107 struct cpu *cpu = container_of(dev, struct cpu, dev); \
108 unsigned long val; \
109 smp_call_function_single(cpu->dev.id, read_##NAME, &val, 1); \
110 return sprintf(buf, "%lx\n", val); \
111} \
112static ssize_t __used \
113 store_##NAME(struct device *dev, struct device_attribute *attr, \
114 const char *buf, size_t count) \
115{ \
116 struct cpu *cpu = container_of(dev, struct cpu, dev); \
117 unsigned long val; \
118 int ret = sscanf(buf, "%lx", &val); \
119 if (ret != 1) \
120 return -EINVAL; \
121 smp_call_function_single(cpu->dev.id, write_##NAME, &val, 1); \
122 return count; \
123}
124
125#define SYSFS_PMCSETUP(NAME, ADDRESS) \
126 __SYSFS_SPRSETUP_READ_WRITE(NAME, ADDRESS, ppc_enable_pmcs()) \
127 __SYSFS_SPRSETUP_SHOW_STORE(NAME)
128#define SYSFS_SPRSETUP(NAME, ADDRESS) \
129 __SYSFS_SPRSETUP_READ_WRITE(NAME, ADDRESS, ) \
130 __SYSFS_SPRSETUP_SHOW_STORE(NAME)
131
132#define SYSFS_SPRSETUP_SHOW_STORE(NAME) \
133 __SYSFS_SPRSETUP_SHOW_STORE(NAME)
134
135#ifdef CONFIG_PPC64
136
137/*
138 * This is the system wide DSCR register default value. Any
139 * change to this default value through the sysfs interface
140 * will update all per cpu DSCR default values across the
141 * system stored in their respective PACA structures.
142 */
143static unsigned long dscr_default;
144
145/**
146 * read_dscr() - Fetch the cpu specific DSCR default
147 * @val: Returned cpu specific DSCR default value
148 *
149 * This function returns the per cpu DSCR default value
150 * for any cpu which is contained in it's PACA structure.
151 */
152static void read_dscr(void *val)
153{
154 *(unsigned long *)val = get_paca()->dscr_default;
155}
156
157
158/**
159 * write_dscr() - Update the cpu specific DSCR default
160 * @val: New cpu specific DSCR default value to update
161 *
162 * This function updates the per cpu DSCR default value
163 * for any cpu which is contained in it's PACA structure.
164 */
165static void write_dscr(void *val)
166{
167 get_paca()->dscr_default = *(unsigned long *)val;
168 if (!current->thread.dscr_inherit) {
169 current->thread.dscr = *(unsigned long *)val;
170 mtspr(SPRN_DSCR, *(unsigned long *)val);
171 }
172}
173
174SYSFS_SPRSETUP_SHOW_STORE(dscr);
175static DEVICE_ATTR(dscr, 0600, show_dscr, store_dscr);
176
177static void add_write_permission_dev_attr(struct device_attribute *attr)
178{
179 attr->attr.mode |= 0200;
180}
181
182/**
183 * show_dscr_default() - Fetch the system wide DSCR default
184 * @dev: Device structure
185 * @attr: Device attribute structure
186 * @buf: Interface buffer
187 *
188 * This function returns the system wide DSCR default value.
189 */
190static ssize_t show_dscr_default(struct device *dev,
191 struct device_attribute *attr, char *buf)
192{
193 return sprintf(buf, "%lx\n", dscr_default);
194}
195
196/**
197 * store_dscr_default() - Update the system wide DSCR default
198 * @dev: Device structure
199 * @attr: Device attribute structure
200 * @buf: Interface buffer
201 * @count: Size of the update
202 *
203 * This function updates the system wide DSCR default value.
204 */
205static ssize_t __used store_dscr_default(struct device *dev,
206 struct device_attribute *attr, const char *buf,
207 size_t count)
208{
209 unsigned long val;
210 int ret = 0;
211
212 ret = sscanf(buf, "%lx", &val);
213 if (ret != 1)
214 return -EINVAL;
215 dscr_default = val;
216
217 on_each_cpu(write_dscr, &val, 1);
218
219 return count;
220}
221
222static DEVICE_ATTR(dscr_default, 0600,
223 show_dscr_default, store_dscr_default);
224
225static void sysfs_create_dscr_default(void)
226{
227 if (cpu_has_feature(CPU_FTR_DSCR)) {
228 int err = 0;
229 int cpu;
230
231 dscr_default = spr_default_dscr;
232 for_each_possible_cpu(cpu)
233 paca_ptrs[cpu]->dscr_default = dscr_default;
234
235 err = device_create_file(cpu_subsys.dev_root, &dev_attr_dscr_default);
236 }
237}
238#endif /* CONFIG_PPC64 */
239
240#ifdef CONFIG_PPC_FSL_BOOK3E
241#define MAX_BIT 63
242
243static u64 pw20_wt;
244static u64 altivec_idle_wt;
245
246static unsigned int get_idle_ticks_bit(u64 ns)
247{
248 u64 cycle;
249
250 if (ns >= 10000)
251 cycle = div_u64(ns + 500, 1000) * tb_ticks_per_usec;
252 else
253 cycle = div_u64(ns * tb_ticks_per_usec, 1000);
254
255 if (!cycle)
256 return 0;
257
258 return ilog2(cycle);
259}
260
261static void do_show_pwrmgtcr0(void *val)
262{
263 u32 *value = val;
264
265 *value = mfspr(SPRN_PWRMGTCR0);
266}
267
268static ssize_t show_pw20_state(struct device *dev,
269 struct device_attribute *attr, char *buf)
270{
271 u32 value;
272 unsigned int cpu = dev->id;
273
274 smp_call_function_single(cpu, do_show_pwrmgtcr0, &value, 1);
275
276 value &= PWRMGTCR0_PW20_WAIT;
277
278 return sprintf(buf, "%u\n", value ? 1 : 0);
279}
280
281static void do_store_pw20_state(void *val)
282{
283 u32 *value = val;
284 u32 pw20_state;
285
286 pw20_state = mfspr(SPRN_PWRMGTCR0);
287
288 if (*value)
289 pw20_state |= PWRMGTCR0_PW20_WAIT;
290 else
291 pw20_state &= ~PWRMGTCR0_PW20_WAIT;
292
293 mtspr(SPRN_PWRMGTCR0, pw20_state);
294}
295
296static ssize_t store_pw20_state(struct device *dev,
297 struct device_attribute *attr,
298 const char *buf, size_t count)
299{
300 u32 value;
301 unsigned int cpu = dev->id;
302
303 if (kstrtou32(buf, 0, &value))
304 return -EINVAL;
305
306 if (value > 1)
307 return -EINVAL;
308
309 smp_call_function_single(cpu, do_store_pw20_state, &value, 1);
310
311 return count;
312}
313
314static ssize_t show_pw20_wait_time(struct device *dev,
315 struct device_attribute *attr, char *buf)
316{
317 u32 value;
318 u64 tb_cycle = 1;
319 u64 time;
320
321 unsigned int cpu = dev->id;
322
323 if (!pw20_wt) {
324 smp_call_function_single(cpu, do_show_pwrmgtcr0, &value, 1);
325 value = (value & PWRMGTCR0_PW20_ENT) >>
326 PWRMGTCR0_PW20_ENT_SHIFT;
327
328 tb_cycle = (tb_cycle << (MAX_BIT - value + 1));
329 /* convert ms to ns */
330 if (tb_ticks_per_usec > 1000) {
331 time = div_u64(tb_cycle, tb_ticks_per_usec / 1000);
332 } else {
333 u32 rem_us;
334
335 time = div_u64_rem(tb_cycle, tb_ticks_per_usec,
336 &rem_us);
337 time = time * 1000 + rem_us * 1000 / tb_ticks_per_usec;
338 }
339 } else {
340 time = pw20_wt;
341 }
342
343 return sprintf(buf, "%llu\n", time > 0 ? time : 0);
344}
345
346static void set_pw20_wait_entry_bit(void *val)
347{
348 u32 *value = val;
349 u32 pw20_idle;
350
351 pw20_idle = mfspr(SPRN_PWRMGTCR0);
352
353 /* Set Automatic PW20 Core Idle Count */
354 /* clear count */
355 pw20_idle &= ~PWRMGTCR0_PW20_ENT;
356
357 /* set count */
358 pw20_idle |= ((MAX_BIT - *value) << PWRMGTCR0_PW20_ENT_SHIFT);
359
360 mtspr(SPRN_PWRMGTCR0, pw20_idle);
361}
362
363static ssize_t store_pw20_wait_time(struct device *dev,
364 struct device_attribute *attr,
365 const char *buf, size_t count)
366{
367 u32 entry_bit;
368 u64 value;
369
370 unsigned int cpu = dev->id;
371
372 if (kstrtou64(buf, 0, &value))
373 return -EINVAL;
374
375 if (!value)
376 return -EINVAL;
377
378 entry_bit = get_idle_ticks_bit(value);
379 if (entry_bit > MAX_BIT)
380 return -EINVAL;
381
382 pw20_wt = value;
383
384 smp_call_function_single(cpu, set_pw20_wait_entry_bit,
385 &entry_bit, 1);
386
387 return count;
388}
389
390static ssize_t show_altivec_idle(struct device *dev,
391 struct device_attribute *attr, char *buf)
392{
393 u32 value;
394 unsigned int cpu = dev->id;
395
396 smp_call_function_single(cpu, do_show_pwrmgtcr0, &value, 1);
397
398 value &= PWRMGTCR0_AV_IDLE_PD_EN;
399
400 return sprintf(buf, "%u\n", value ? 1 : 0);
401}
402
403static void do_store_altivec_idle(void *val)
404{
405 u32 *value = val;
406 u32 altivec_idle;
407
408 altivec_idle = mfspr(SPRN_PWRMGTCR0);
409
410 if (*value)
411 altivec_idle |= PWRMGTCR0_AV_IDLE_PD_EN;
412 else
413 altivec_idle &= ~PWRMGTCR0_AV_IDLE_PD_EN;
414
415 mtspr(SPRN_PWRMGTCR0, altivec_idle);
416}
417
418static ssize_t store_altivec_idle(struct device *dev,
419 struct device_attribute *attr,
420 const char *buf, size_t count)
421{
422 u32 value;
423 unsigned int cpu = dev->id;
424
425 if (kstrtou32(buf, 0, &value))
426 return -EINVAL;
427
428 if (value > 1)
429 return -EINVAL;
430
431 smp_call_function_single(cpu, do_store_altivec_idle, &value, 1);
432
433 return count;
434}
435
436static ssize_t show_altivec_idle_wait_time(struct device *dev,
437 struct device_attribute *attr, char *buf)
438{
439 u32 value;
440 u64 tb_cycle = 1;
441 u64 time;
442
443 unsigned int cpu = dev->id;
444
445 if (!altivec_idle_wt) {
446 smp_call_function_single(cpu, do_show_pwrmgtcr0, &value, 1);
447 value = (value & PWRMGTCR0_AV_IDLE_CNT) >>
448 PWRMGTCR0_AV_IDLE_CNT_SHIFT;
449
450 tb_cycle = (tb_cycle << (MAX_BIT - value + 1));
451 /* convert ms to ns */
452 if (tb_ticks_per_usec > 1000) {
453 time = div_u64(tb_cycle, tb_ticks_per_usec / 1000);
454 } else {
455 u32 rem_us;
456
457 time = div_u64_rem(tb_cycle, tb_ticks_per_usec,
458 &rem_us);
459 time = time * 1000 + rem_us * 1000 / tb_ticks_per_usec;
460 }
461 } else {
462 time = altivec_idle_wt;
463 }
464
465 return sprintf(buf, "%llu\n", time > 0 ? time : 0);
466}
467
468static void set_altivec_idle_wait_entry_bit(void *val)
469{
470 u32 *value = val;
471 u32 altivec_idle;
472
473 altivec_idle = mfspr(SPRN_PWRMGTCR0);
474
475 /* Set Automatic AltiVec Idle Count */
476 /* clear count */
477 altivec_idle &= ~PWRMGTCR0_AV_IDLE_CNT;
478
479 /* set count */
480 altivec_idle |= ((MAX_BIT - *value) << PWRMGTCR0_AV_IDLE_CNT_SHIFT);
481
482 mtspr(SPRN_PWRMGTCR0, altivec_idle);
483}
484
485static ssize_t store_altivec_idle_wait_time(struct device *dev,
486 struct device_attribute *attr,
487 const char *buf, size_t count)
488{
489 u32 entry_bit;
490 u64 value;
491
492 unsigned int cpu = dev->id;
493
494 if (kstrtou64(buf, 0, &value))
495 return -EINVAL;
496
497 if (!value)
498 return -EINVAL;
499
500 entry_bit = get_idle_ticks_bit(value);
501 if (entry_bit > MAX_BIT)
502 return -EINVAL;
503
504 altivec_idle_wt = value;
505
506 smp_call_function_single(cpu, set_altivec_idle_wait_entry_bit,
507 &entry_bit, 1);
508
509 return count;
510}
511
512/*
513 * Enable/Disable interface:
514 * 0, disable. 1, enable.
515 */
516static DEVICE_ATTR(pw20_state, 0600, show_pw20_state, store_pw20_state);
517static DEVICE_ATTR(altivec_idle, 0600, show_altivec_idle, store_altivec_idle);
518
519/*
520 * Set wait time interface:(Nanosecond)
521 * Example: Base on TBfreq is 41MHZ.
522 * 1~48(ns): TB[63]
523 * 49~97(ns): TB[62]
524 * 98~195(ns): TB[61]
525 * 196~390(ns): TB[60]
526 * 391~780(ns): TB[59]
527 * 781~1560(ns): TB[58]
528 * ...
529 */
530static DEVICE_ATTR(pw20_wait_time, 0600,
531 show_pw20_wait_time,
532 store_pw20_wait_time);
533static DEVICE_ATTR(altivec_idle_wait_time, 0600,
534 show_altivec_idle_wait_time,
535 store_altivec_idle_wait_time);
536#endif
537
538/*
539 * Enabling PMCs will slow partition context switch times so we only do
540 * it the first time we write to the PMCs.
541 */
542
543static DEFINE_PER_CPU(char, pmcs_enabled);
544
545void ppc_enable_pmcs(void)
546{
547 ppc_set_pmu_inuse(1);
548
549 /* Only need to enable them once */
550 if (__this_cpu_read(pmcs_enabled))
551 return;
552
553 __this_cpu_write(pmcs_enabled, 1);
554
555 if (ppc_md.enable_pmcs)
556 ppc_md.enable_pmcs();
557}
558EXPORT_SYMBOL(ppc_enable_pmcs);
559
560
561
562/* Let's define all possible registers, we'll only hook up the ones
563 * that are implemented on the current processor
564 */
565
566#ifdef CONFIG_PMU_SYSFS
567#if defined(CONFIG_PPC64) || defined(CONFIG_PPC_BOOK3S_32)
568#define HAS_PPC_PMC_CLASSIC 1
569#define HAS_PPC_PMC_IBM 1
570#endif
571
572#ifdef CONFIG_PPC64
573#define HAS_PPC_PMC_PA6T 1
574#define HAS_PPC_PMC56 1
575#endif
576
577#ifdef CONFIG_PPC_BOOK3S_32
578#define HAS_PPC_PMC_G4 1
579#endif
580#endif /* CONFIG_PMU_SYSFS */
581
582#if defined(CONFIG_PPC64) && defined(CONFIG_DEBUG_MISC)
583#define HAS_PPC_PA6T
584#endif
585/*
586 * SPRs which are not related to PMU.
587 */
588#ifdef CONFIG_PPC64
589SYSFS_SPRSETUP(purr, SPRN_PURR);
590SYSFS_SPRSETUP(spurr, SPRN_SPURR);
591SYSFS_SPRSETUP(pir, SPRN_PIR);
592SYSFS_SPRSETUP(tscr, SPRN_TSCR);
593
594/*
595 Lets only enable read for phyp resources and
596 enable write when needed with a separate function.
597 Lets be conservative and default to pseries.
598*/
599static DEVICE_ATTR(spurr, 0400, show_spurr, NULL);
600static DEVICE_ATTR(purr, 0400, show_purr, store_purr);
601static DEVICE_ATTR(pir, 0400, show_pir, NULL);
602static DEVICE_ATTR(tscr, 0600, show_tscr, store_tscr);
603#endif /* CONFIG_PPC64 */
604
605#ifdef HAS_PPC_PMC_CLASSIC
606SYSFS_PMCSETUP(mmcr0, SPRN_MMCR0);
607SYSFS_PMCSETUP(mmcr1, SPRN_MMCR1);
608SYSFS_PMCSETUP(pmc1, SPRN_PMC1);
609SYSFS_PMCSETUP(pmc2, SPRN_PMC2);
610SYSFS_PMCSETUP(pmc3, SPRN_PMC3);
611SYSFS_PMCSETUP(pmc4, SPRN_PMC4);
612SYSFS_PMCSETUP(pmc5, SPRN_PMC5);
613SYSFS_PMCSETUP(pmc6, SPRN_PMC6);
614#endif
615
616#ifdef HAS_PPC_PMC_G4
617SYSFS_PMCSETUP(mmcr2, SPRN_MMCR2);
618#endif
619
620#ifdef HAS_PPC_PMC56
621SYSFS_PMCSETUP(pmc7, SPRN_PMC7);
622SYSFS_PMCSETUP(pmc8, SPRN_PMC8);
623
624SYSFS_PMCSETUP(mmcra, SPRN_MMCRA);
625SYSFS_PMCSETUP(mmcr3, SPRN_MMCR3);
626
627static DEVICE_ATTR(mmcra, 0600, show_mmcra, store_mmcra);
628static DEVICE_ATTR(mmcr3, 0600, show_mmcr3, store_mmcr3);
629#endif /* HAS_PPC_PMC56 */
630
631
632
633
634#ifdef HAS_PPC_PMC_PA6T
635SYSFS_PMCSETUP(pa6t_pmc0, SPRN_PA6T_PMC0);
636SYSFS_PMCSETUP(pa6t_pmc1, SPRN_PA6T_PMC1);
637SYSFS_PMCSETUP(pa6t_pmc2, SPRN_PA6T_PMC2);
638SYSFS_PMCSETUP(pa6t_pmc3, SPRN_PA6T_PMC3);
639SYSFS_PMCSETUP(pa6t_pmc4, SPRN_PA6T_PMC4);
640SYSFS_PMCSETUP(pa6t_pmc5, SPRN_PA6T_PMC5);
641#endif
642
643#ifdef HAS_PPC_PA6T
644SYSFS_SPRSETUP(hid0, SPRN_HID0);
645SYSFS_SPRSETUP(hid1, SPRN_HID1);
646SYSFS_SPRSETUP(hid4, SPRN_HID4);
647SYSFS_SPRSETUP(hid5, SPRN_HID5);
648SYSFS_SPRSETUP(ima0, SPRN_PA6T_IMA0);
649SYSFS_SPRSETUP(ima1, SPRN_PA6T_IMA1);
650SYSFS_SPRSETUP(ima2, SPRN_PA6T_IMA2);
651SYSFS_SPRSETUP(ima3, SPRN_PA6T_IMA3);
652SYSFS_SPRSETUP(ima4, SPRN_PA6T_IMA4);
653SYSFS_SPRSETUP(ima5, SPRN_PA6T_IMA5);
654SYSFS_SPRSETUP(ima6, SPRN_PA6T_IMA6);
655SYSFS_SPRSETUP(ima7, SPRN_PA6T_IMA7);
656SYSFS_SPRSETUP(ima8, SPRN_PA6T_IMA8);
657SYSFS_SPRSETUP(ima9, SPRN_PA6T_IMA9);
658SYSFS_SPRSETUP(imaat, SPRN_PA6T_IMAAT);
659SYSFS_SPRSETUP(btcr, SPRN_PA6T_BTCR);
660SYSFS_SPRSETUP(pccr, SPRN_PA6T_PCCR);
661SYSFS_SPRSETUP(rpccr, SPRN_PA6T_RPCCR);
662SYSFS_SPRSETUP(der, SPRN_PA6T_DER);
663SYSFS_SPRSETUP(mer, SPRN_PA6T_MER);
664SYSFS_SPRSETUP(ber, SPRN_PA6T_BER);
665SYSFS_SPRSETUP(ier, SPRN_PA6T_IER);
666SYSFS_SPRSETUP(sier, SPRN_PA6T_SIER);
667SYSFS_SPRSETUP(siar, SPRN_PA6T_SIAR);
668SYSFS_SPRSETUP(tsr0, SPRN_PA6T_TSR0);
669SYSFS_SPRSETUP(tsr1, SPRN_PA6T_TSR1);
670SYSFS_SPRSETUP(tsr2, SPRN_PA6T_TSR2);
671SYSFS_SPRSETUP(tsr3, SPRN_PA6T_TSR3);
672#endif /* HAS_PPC_PA6T */
673
674#ifdef HAS_PPC_PMC_IBM
675static struct device_attribute ibm_common_attrs[] = {
676 __ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0),
677 __ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1),
678};
679#endif /* HAS_PPC_PMC_IBM */
680
681#ifdef HAS_PPC_PMC_G4
682static struct device_attribute g4_common_attrs[] = {
683 __ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0),
684 __ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1),
685 __ATTR(mmcr2, 0600, show_mmcr2, store_mmcr2),
686};
687#endif /* HAS_PPC_PMC_G4 */
688
689#ifdef HAS_PPC_PMC_CLASSIC
690static struct device_attribute classic_pmc_attrs[] = {
691 __ATTR(pmc1, 0600, show_pmc1, store_pmc1),
692 __ATTR(pmc2, 0600, show_pmc2, store_pmc2),
693 __ATTR(pmc3, 0600, show_pmc3, store_pmc3),
694 __ATTR(pmc4, 0600, show_pmc4, store_pmc4),
695 __ATTR(pmc5, 0600, show_pmc5, store_pmc5),
696 __ATTR(pmc6, 0600, show_pmc6, store_pmc6),
697#ifdef HAS_PPC_PMC56
698 __ATTR(pmc7, 0600, show_pmc7, store_pmc7),
699 __ATTR(pmc8, 0600, show_pmc8, store_pmc8),
700#endif
701};
702#endif
703
704#if defined(HAS_PPC_PMC_PA6T) || defined(HAS_PPC_PA6T)
705static struct device_attribute pa6t_attrs[] = {
706#ifdef HAS_PPC_PMC_PA6T
707 __ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0),
708 __ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1),
709 __ATTR(pmc0, 0600, show_pa6t_pmc0, store_pa6t_pmc0),
710 __ATTR(pmc1, 0600, show_pa6t_pmc1, store_pa6t_pmc1),
711 __ATTR(pmc2, 0600, show_pa6t_pmc2, store_pa6t_pmc2),
712 __ATTR(pmc3, 0600, show_pa6t_pmc3, store_pa6t_pmc3),
713 __ATTR(pmc4, 0600, show_pa6t_pmc4, store_pa6t_pmc4),
714 __ATTR(pmc5, 0600, show_pa6t_pmc5, store_pa6t_pmc5),
715#endif
716#ifdef HAS_PPC_PA6T
717 __ATTR(hid0, 0600, show_hid0, store_hid0),
718 __ATTR(hid1, 0600, show_hid1, store_hid1),
719 __ATTR(hid4, 0600, show_hid4, store_hid4),
720 __ATTR(hid5, 0600, show_hid5, store_hid5),
721 __ATTR(ima0, 0600, show_ima0, store_ima0),
722 __ATTR(ima1, 0600, show_ima1, store_ima1),
723 __ATTR(ima2, 0600, show_ima2, store_ima2),
724 __ATTR(ima3, 0600, show_ima3, store_ima3),
725 __ATTR(ima4, 0600, show_ima4, store_ima4),
726 __ATTR(ima5, 0600, show_ima5, store_ima5),
727 __ATTR(ima6, 0600, show_ima6, store_ima6),
728 __ATTR(ima7, 0600, show_ima7, store_ima7),
729 __ATTR(ima8, 0600, show_ima8, store_ima8),
730 __ATTR(ima9, 0600, show_ima9, store_ima9),
731 __ATTR(imaat, 0600, show_imaat, store_imaat),
732 __ATTR(btcr, 0600, show_btcr, store_btcr),
733 __ATTR(pccr, 0600, show_pccr, store_pccr),
734 __ATTR(rpccr, 0600, show_rpccr, store_rpccr),
735 __ATTR(der, 0600, show_der, store_der),
736 __ATTR(mer, 0600, show_mer, store_mer),
737 __ATTR(ber, 0600, show_ber, store_ber),
738 __ATTR(ier, 0600, show_ier, store_ier),
739 __ATTR(sier, 0600, show_sier, store_sier),
740 __ATTR(siar, 0600, show_siar, store_siar),
741 __ATTR(tsr0, 0600, show_tsr0, store_tsr0),
742 __ATTR(tsr1, 0600, show_tsr1, store_tsr1),
743 __ATTR(tsr2, 0600, show_tsr2, store_tsr2),
744 __ATTR(tsr3, 0600, show_tsr3, store_tsr3),
745#endif /* HAS_PPC_PA6T */
746};
747#endif
748
749#ifdef CONFIG_PPC_SVM
750static ssize_t show_svm(struct device *dev, struct device_attribute *attr, char *buf)
751{
752 return sprintf(buf, "%u\n", is_secure_guest());
753}
754static DEVICE_ATTR(svm, 0444, show_svm, NULL);
755
756static void create_svm_file(void)
757{
758 device_create_file(cpu_subsys.dev_root, &dev_attr_svm);
759}
760#else
761static void create_svm_file(void)
762{
763}
764#endif /* CONFIG_PPC_SVM */
765
766#ifdef CONFIG_PPC_PSERIES
767static void read_idle_purr(void *val)
768{
769 u64 *ret = val;
770
771 *ret = read_this_idle_purr();
772}
773
774static ssize_t idle_purr_show(struct device *dev,
775 struct device_attribute *attr, char *buf)
776{
777 struct cpu *cpu = container_of(dev, struct cpu, dev);
778 u64 val;
779
780 smp_call_function_single(cpu->dev.id, read_idle_purr, &val, 1);
781 return sprintf(buf, "%llx\n", val);
782}
783static DEVICE_ATTR(idle_purr, 0400, idle_purr_show, NULL);
784
785static void create_idle_purr_file(struct device *s)
786{
787 if (firmware_has_feature(FW_FEATURE_LPAR))
788 device_create_file(s, &dev_attr_idle_purr);
789}
790
791static void remove_idle_purr_file(struct device *s)
792{
793 if (firmware_has_feature(FW_FEATURE_LPAR))
794 device_remove_file(s, &dev_attr_idle_purr);
795}
796
797static void read_idle_spurr(void *val)
798{
799 u64 *ret = val;
800
801 *ret = read_this_idle_spurr();
802}
803
804static ssize_t idle_spurr_show(struct device *dev,
805 struct device_attribute *attr, char *buf)
806{
807 struct cpu *cpu = container_of(dev, struct cpu, dev);
808 u64 val;
809
810 smp_call_function_single(cpu->dev.id, read_idle_spurr, &val, 1);
811 return sprintf(buf, "%llx\n", val);
812}
813static DEVICE_ATTR(idle_spurr, 0400, idle_spurr_show, NULL);
814
815static void create_idle_spurr_file(struct device *s)
816{
817 if (firmware_has_feature(FW_FEATURE_LPAR))
818 device_create_file(s, &dev_attr_idle_spurr);
819}
820
821static void remove_idle_spurr_file(struct device *s)
822{
823 if (firmware_has_feature(FW_FEATURE_LPAR))
824 device_remove_file(s, &dev_attr_idle_spurr);
825}
826
827#else /* CONFIG_PPC_PSERIES */
828#define create_idle_purr_file(s)
829#define remove_idle_purr_file(s)
830#define create_idle_spurr_file(s)
831#define remove_idle_spurr_file(s)
832#endif /* CONFIG_PPC_PSERIES */
833
834static int register_cpu_online(unsigned int cpu)
835{
836 struct cpu *c = &per_cpu(cpu_devices, cpu);
837 struct device *s = &c->dev;
838 struct device_attribute *attrs, *pmc_attrs;
839 int i, nattrs;
840
841 /* For cpus present at boot a reference was already grabbed in register_cpu() */
842 if (!s->of_node)
843 s->of_node = of_get_cpu_node(cpu, NULL);
844
845#ifdef CONFIG_PPC64
846 if (cpu_has_feature(CPU_FTR_SMT))
847 device_create_file(s, &dev_attr_smt_snooze_delay);
848#endif
849
850 /* PMC stuff */
851 switch (cur_cpu_spec->pmc_type) {
852#ifdef HAS_PPC_PMC_IBM
853 case PPC_PMC_IBM:
854 attrs = ibm_common_attrs;
855 nattrs = sizeof(ibm_common_attrs) / sizeof(struct device_attribute);
856 pmc_attrs = classic_pmc_attrs;
857 break;
858#endif /* HAS_PPC_PMC_IBM */
859#ifdef HAS_PPC_PMC_G4
860 case PPC_PMC_G4:
861 attrs = g4_common_attrs;
862 nattrs = sizeof(g4_common_attrs) / sizeof(struct device_attribute);
863 pmc_attrs = classic_pmc_attrs;
864 break;
865#endif /* HAS_PPC_PMC_G4 */
866#if defined(HAS_PPC_PMC_PA6T) || defined(HAS_PPC_PA6T)
867 case PPC_PMC_PA6T:
868 /* PA Semi starts counting at PMC0 */
869 attrs = pa6t_attrs;
870 nattrs = sizeof(pa6t_attrs) / sizeof(struct device_attribute);
871 pmc_attrs = NULL;
872 break;
873#endif
874 default:
875 attrs = NULL;
876 nattrs = 0;
877 pmc_attrs = NULL;
878 }
879
880 for (i = 0; i < nattrs; i++)
881 device_create_file(s, &attrs[i]);
882
883 if (pmc_attrs)
884 for (i = 0; i < cur_cpu_spec->num_pmcs; i++)
885 device_create_file(s, &pmc_attrs[i]);
886
887#ifdef CONFIG_PPC64
888#ifdef CONFIG_PMU_SYSFS
889 if (cpu_has_feature(CPU_FTR_MMCRA))
890 device_create_file(s, &dev_attr_mmcra);
891
892 if (cpu_has_feature(CPU_FTR_ARCH_31))
893 device_create_file(s, &dev_attr_mmcr3);
894#endif /* CONFIG_PMU_SYSFS */
895
896 if (cpu_has_feature(CPU_FTR_PURR)) {
897 if (!firmware_has_feature(FW_FEATURE_LPAR))
898 add_write_permission_dev_attr(&dev_attr_purr);
899 device_create_file(s, &dev_attr_purr);
900 create_idle_purr_file(s);
901 }
902
903 if (cpu_has_feature(CPU_FTR_SPURR)) {
904 device_create_file(s, &dev_attr_spurr);
905 create_idle_spurr_file(s);
906 }
907
908 if (cpu_has_feature(CPU_FTR_DSCR))
909 device_create_file(s, &dev_attr_dscr);
910
911 if (cpu_has_feature(CPU_FTR_PPCAS_ARCH_V2))
912 device_create_file(s, &dev_attr_pir);
913
914 if (cpu_has_feature(CPU_FTR_ARCH_206) &&
915 !firmware_has_feature(FW_FEATURE_LPAR))
916 device_create_file(s, &dev_attr_tscr);
917#endif /* CONFIG_PPC64 */
918
919#ifdef CONFIG_PPC_FSL_BOOK3E
920 if (PVR_VER(cur_cpu_spec->pvr_value) == PVR_VER_E6500) {
921 device_create_file(s, &dev_attr_pw20_state);
922 device_create_file(s, &dev_attr_pw20_wait_time);
923
924 device_create_file(s, &dev_attr_altivec_idle);
925 device_create_file(s, &dev_attr_altivec_idle_wait_time);
926 }
927#endif
928 cacheinfo_cpu_online(cpu);
929 return 0;
930}
931
932#ifdef CONFIG_HOTPLUG_CPU
933static int unregister_cpu_online(unsigned int cpu)
934{
935 struct cpu *c = &per_cpu(cpu_devices, cpu);
936 struct device *s = &c->dev;
937 struct device_attribute *attrs, *pmc_attrs;
938 int i, nattrs;
939
940 BUG_ON(!c->hotpluggable);
941
942#ifdef CONFIG_PPC64
943 if (cpu_has_feature(CPU_FTR_SMT))
944 device_remove_file(s, &dev_attr_smt_snooze_delay);
945#endif
946
947 /* PMC stuff */
948 switch (cur_cpu_spec->pmc_type) {
949#ifdef HAS_PPC_PMC_IBM
950 case PPC_PMC_IBM:
951 attrs = ibm_common_attrs;
952 nattrs = sizeof(ibm_common_attrs) / sizeof(struct device_attribute);
953 pmc_attrs = classic_pmc_attrs;
954 break;
955#endif /* HAS_PPC_PMC_IBM */
956#ifdef HAS_PPC_PMC_G4
957 case PPC_PMC_G4:
958 attrs = g4_common_attrs;
959 nattrs = sizeof(g4_common_attrs) / sizeof(struct device_attribute);
960 pmc_attrs = classic_pmc_attrs;
961 break;
962#endif /* HAS_PPC_PMC_G4 */
963#if defined(HAS_PPC_PMC_PA6T) || defined(HAS_PPC_PA6T)
964 case PPC_PMC_PA6T:
965 /* PA Semi starts counting at PMC0 */
966 attrs = pa6t_attrs;
967 nattrs = sizeof(pa6t_attrs) / sizeof(struct device_attribute);
968 pmc_attrs = NULL;
969 break;
970#endif
971 default:
972 attrs = NULL;
973 nattrs = 0;
974 pmc_attrs = NULL;
975 }
976
977 for (i = 0; i < nattrs; i++)
978 device_remove_file(s, &attrs[i]);
979
980 if (pmc_attrs)
981 for (i = 0; i < cur_cpu_spec->num_pmcs; i++)
982 device_remove_file(s, &pmc_attrs[i]);
983
984#ifdef CONFIG_PPC64
985#ifdef CONFIG_PMU_SYSFS
986 if (cpu_has_feature(CPU_FTR_MMCRA))
987 device_remove_file(s, &dev_attr_mmcra);
988
989 if (cpu_has_feature(CPU_FTR_ARCH_31))
990 device_remove_file(s, &dev_attr_mmcr3);
991#endif /* CONFIG_PMU_SYSFS */
992
993 if (cpu_has_feature(CPU_FTR_PURR)) {
994 device_remove_file(s, &dev_attr_purr);
995 remove_idle_purr_file(s);
996 }
997
998 if (cpu_has_feature(CPU_FTR_SPURR)) {
999 device_remove_file(s, &dev_attr_spurr);
1000 remove_idle_spurr_file(s);
1001 }
1002
1003 if (cpu_has_feature(CPU_FTR_DSCR))
1004 device_remove_file(s, &dev_attr_dscr);
1005
1006 if (cpu_has_feature(CPU_FTR_PPCAS_ARCH_V2))
1007 device_remove_file(s, &dev_attr_pir);
1008
1009 if (cpu_has_feature(CPU_FTR_ARCH_206) &&
1010 !firmware_has_feature(FW_FEATURE_LPAR))
1011 device_remove_file(s, &dev_attr_tscr);
1012#endif /* CONFIG_PPC64 */
1013
1014#ifdef CONFIG_PPC_FSL_BOOK3E
1015 if (PVR_VER(cur_cpu_spec->pvr_value) == PVR_VER_E6500) {
1016 device_remove_file(s, &dev_attr_pw20_state);
1017 device_remove_file(s, &dev_attr_pw20_wait_time);
1018
1019 device_remove_file(s, &dev_attr_altivec_idle);
1020 device_remove_file(s, &dev_attr_altivec_idle_wait_time);
1021 }
1022#endif
1023 cacheinfo_cpu_offline(cpu);
1024 of_node_put(s->of_node);
1025 s->of_node = NULL;
1026 return 0;
1027}
1028#else /* !CONFIG_HOTPLUG_CPU */
1029#define unregister_cpu_online NULL
1030#endif
1031
1032#ifdef CONFIG_ARCH_CPU_PROBE_RELEASE
1033ssize_t arch_cpu_probe(const char *buf, size_t count)
1034{
1035 if (ppc_md.cpu_probe)
1036 return ppc_md.cpu_probe(buf, count);
1037
1038 return -EINVAL;
1039}
1040
1041ssize_t arch_cpu_release(const char *buf, size_t count)
1042{
1043 if (ppc_md.cpu_release)
1044 return ppc_md.cpu_release(buf, count);
1045
1046 return -EINVAL;
1047}
1048#endif /* CONFIG_ARCH_CPU_PROBE_RELEASE */
1049
1050static DEFINE_MUTEX(cpu_mutex);
1051
1052int cpu_add_dev_attr(struct device_attribute *attr)
1053{
1054 int cpu;
1055
1056 mutex_lock(&cpu_mutex);
1057
1058 for_each_possible_cpu(cpu) {
1059 device_create_file(get_cpu_device(cpu), attr);
1060 }
1061
1062 mutex_unlock(&cpu_mutex);
1063 return 0;
1064}
1065EXPORT_SYMBOL_GPL(cpu_add_dev_attr);
1066
1067int cpu_add_dev_attr_group(struct attribute_group *attrs)
1068{
1069 int cpu;
1070 struct device *dev;
1071 int ret;
1072
1073 mutex_lock(&cpu_mutex);
1074
1075 for_each_possible_cpu(cpu) {
1076 dev = get_cpu_device(cpu);
1077 ret = sysfs_create_group(&dev->kobj, attrs);
1078 WARN_ON(ret != 0);
1079 }
1080
1081 mutex_unlock(&cpu_mutex);
1082 return 0;
1083}
1084EXPORT_SYMBOL_GPL(cpu_add_dev_attr_group);
1085
1086
1087void cpu_remove_dev_attr(struct device_attribute *attr)
1088{
1089 int cpu;
1090
1091 mutex_lock(&cpu_mutex);
1092
1093 for_each_possible_cpu(cpu) {
1094 device_remove_file(get_cpu_device(cpu), attr);
1095 }
1096
1097 mutex_unlock(&cpu_mutex);
1098}
1099EXPORT_SYMBOL_GPL(cpu_remove_dev_attr);
1100
1101void cpu_remove_dev_attr_group(struct attribute_group *attrs)
1102{
1103 int cpu;
1104 struct device *dev;
1105
1106 mutex_lock(&cpu_mutex);
1107
1108 for_each_possible_cpu(cpu) {
1109 dev = get_cpu_device(cpu);
1110 sysfs_remove_group(&dev->kobj, attrs);
1111 }
1112
1113 mutex_unlock(&cpu_mutex);
1114}
1115EXPORT_SYMBOL_GPL(cpu_remove_dev_attr_group);
1116
1117
1118/* NUMA stuff */
1119
1120#ifdef CONFIG_NUMA
1121static void register_nodes(void)
1122{
1123 int i;
1124
1125 for (i = 0; i < MAX_NUMNODES; i++)
1126 register_one_node(i);
1127}
1128
1129int sysfs_add_device_to_node(struct device *dev, int nid)
1130{
1131 struct node *node = node_devices[nid];
1132 return sysfs_create_link(&node->dev.kobj, &dev->kobj,
1133 kobject_name(&dev->kobj));
1134}
1135EXPORT_SYMBOL_GPL(sysfs_add_device_to_node);
1136
1137void sysfs_remove_device_from_node(struct device *dev, int nid)
1138{
1139 struct node *node = node_devices[nid];
1140 sysfs_remove_link(&node->dev.kobj, kobject_name(&dev->kobj));
1141}
1142EXPORT_SYMBOL_GPL(sysfs_remove_device_from_node);
1143
1144#else
1145static void register_nodes(void)
1146{
1147 return;
1148}
1149
1150#endif
1151
1152/* Only valid if CPU is present. */
1153static ssize_t show_physical_id(struct device *dev,
1154 struct device_attribute *attr, char *buf)
1155{
1156 struct cpu *cpu = container_of(dev, struct cpu, dev);
1157
1158 return sprintf(buf, "%d\n", get_hard_smp_processor_id(cpu->dev.id));
1159}
1160static DEVICE_ATTR(physical_id, 0444, show_physical_id, NULL);
1161
1162static int __init topology_init(void)
1163{
1164 int cpu, r;
1165
1166 register_nodes();
1167
1168 for_each_possible_cpu(cpu) {
1169 struct cpu *c = &per_cpu(cpu_devices, cpu);
1170
1171 /*
1172 * For now, we just see if the system supports making
1173 * the RTAS calls for CPU hotplug. But, there may be a
1174 * more comprehensive way to do this for an individual
1175 * CPU. For instance, the boot cpu might never be valid
1176 * for hotplugging.
1177 */
1178 if (ppc_md.cpu_die)
1179 c->hotpluggable = 1;
1180
1181 if (cpu_online(cpu) || c->hotpluggable) {
1182 register_cpu(c, cpu);
1183
1184 device_create_file(&c->dev, &dev_attr_physical_id);
1185 }
1186 }
1187 r = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "powerpc/topology:online",
1188 register_cpu_online, unregister_cpu_online);
1189 WARN_ON(r < 0);
1190#ifdef CONFIG_PPC64
1191 sysfs_create_dscr_default();
1192#endif /* CONFIG_PPC64 */
1193
1194 create_svm_file();
1195
1196 return 0;
1197}
1198subsys_initcall(topology_init);
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
33static 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
49static 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
59static 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
68static DEVICE_ATTR(smt_snooze_delay, 0644, show_smt_snooze_delay,
69 store_smt_snooze_delay);
70
71static 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) \
84static void read_##NAME(void *val) \
85{ \
86 *(unsigned long *)val = mfspr(ADDRESS); \
87} \
88static void write_##NAME(void *val) \
89{ \
90 EXTRA; \
91 mtspr(ADDRESS, *(unsigned long *)val); \
92}
93
94#define __SYSFS_SPRSETUP_SHOW_STORE(NAME) \
95static 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} \
104static 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 */
135static 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 */
144static 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 */
157static 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
166SYSFS_SPRSETUP_SHOW_STORE(dscr);
167static DEVICE_ATTR(dscr, 0600, show_dscr, store_dscr);
168
169static 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 */
182static 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 */
197static 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
214static DEVICE_ATTR(dscr_default, 0600,
215 show_dscr_default, store_dscr_default);
216
217static 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
234static u64 pw20_wt;
235static u64 altivec_idle_wt;
236
237static 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
252static void do_show_pwrmgtcr0(void *val)
253{
254 u32 *value = val;
255
256 *value = mfspr(SPRN_PWRMGTCR0);
257}
258
259static 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
272static 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
287static 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
305static 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
337static 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
354static 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
381static 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
394static 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
409static 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
427static 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
459static 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
476static 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 */
507static DEVICE_ATTR(pw20_state, 0600, show_pw20_state, store_pw20_state);
508static 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 */
521static DEVICE_ATTR(pw20_wait_time, 0600,
522 show_pw20_wait_time,
523 store_pw20_wait_time);
524static 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
534static DEFINE_PER_CPU(char, pmcs_enabled);
535
536void 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}
549EXPORT_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
580SYSFS_SPRSETUP(purr, SPRN_PURR);
581SYSFS_SPRSETUP(spurr, SPRN_SPURR);
582SYSFS_SPRSETUP(pir, SPRN_PIR);
583SYSFS_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*/
590static DEVICE_ATTR(spurr, 0400, show_spurr, NULL);
591static DEVICE_ATTR(purr, 0400, show_purr, store_purr);
592static DEVICE_ATTR(pir, 0400, show_pir, NULL);
593static DEVICE_ATTR(tscr, 0600, show_tscr, store_tscr);
594#endif /* CONFIG_PPC64 */
595
596#ifdef HAS_PPC_PMC_CLASSIC
597SYSFS_PMCSETUP(mmcr0, SPRN_MMCR0);
598SYSFS_PMCSETUP(mmcr1, SPRN_MMCR1);
599SYSFS_PMCSETUP(pmc1, SPRN_PMC1);
600SYSFS_PMCSETUP(pmc2, SPRN_PMC2);
601SYSFS_PMCSETUP(pmc3, SPRN_PMC3);
602SYSFS_PMCSETUP(pmc4, SPRN_PMC4);
603SYSFS_PMCSETUP(pmc5, SPRN_PMC5);
604SYSFS_PMCSETUP(pmc6, SPRN_PMC6);
605#endif
606
607#ifdef HAS_PPC_PMC_G4
608SYSFS_PMCSETUP(mmcr2, SPRN_MMCR2);
609#endif
610
611#ifdef HAS_PPC_PMC56
612SYSFS_PMCSETUP(pmc7, SPRN_PMC7);
613SYSFS_PMCSETUP(pmc8, SPRN_PMC8);
614
615SYSFS_PMCSETUP(mmcra, SPRN_MMCRA);
616SYSFS_PMCSETUP(mmcr3, SPRN_MMCR3);
617
618static DEVICE_ATTR(mmcra, 0600, show_mmcra, store_mmcra);
619static DEVICE_ATTR(mmcr3, 0600, show_mmcr3, store_mmcr3);
620#endif /* HAS_PPC_PMC56 */
621
622
623
624
625#ifdef HAS_PPC_PMC_PA6T
626SYSFS_PMCSETUP(pa6t_pmc0, SPRN_PA6T_PMC0);
627SYSFS_PMCSETUP(pa6t_pmc1, SPRN_PA6T_PMC1);
628SYSFS_PMCSETUP(pa6t_pmc2, SPRN_PA6T_PMC2);
629SYSFS_PMCSETUP(pa6t_pmc3, SPRN_PA6T_PMC3);
630SYSFS_PMCSETUP(pa6t_pmc4, SPRN_PA6T_PMC4);
631SYSFS_PMCSETUP(pa6t_pmc5, SPRN_PA6T_PMC5);
632#endif
633
634#ifdef HAS_PPC_PA6T
635SYSFS_SPRSETUP(hid0, SPRN_HID0);
636SYSFS_SPRSETUP(hid1, SPRN_HID1);
637SYSFS_SPRSETUP(hid4, SPRN_HID4);
638SYSFS_SPRSETUP(hid5, SPRN_HID5);
639SYSFS_SPRSETUP(ima0, SPRN_PA6T_IMA0);
640SYSFS_SPRSETUP(ima1, SPRN_PA6T_IMA1);
641SYSFS_SPRSETUP(ima2, SPRN_PA6T_IMA2);
642SYSFS_SPRSETUP(ima3, SPRN_PA6T_IMA3);
643SYSFS_SPRSETUP(ima4, SPRN_PA6T_IMA4);
644SYSFS_SPRSETUP(ima5, SPRN_PA6T_IMA5);
645SYSFS_SPRSETUP(ima6, SPRN_PA6T_IMA6);
646SYSFS_SPRSETUP(ima7, SPRN_PA6T_IMA7);
647SYSFS_SPRSETUP(ima8, SPRN_PA6T_IMA8);
648SYSFS_SPRSETUP(ima9, SPRN_PA6T_IMA9);
649SYSFS_SPRSETUP(imaat, SPRN_PA6T_IMAAT);
650SYSFS_SPRSETUP(btcr, SPRN_PA6T_BTCR);
651SYSFS_SPRSETUP(pccr, SPRN_PA6T_PCCR);
652SYSFS_SPRSETUP(rpccr, SPRN_PA6T_RPCCR);
653SYSFS_SPRSETUP(der, SPRN_PA6T_DER);
654SYSFS_SPRSETUP(mer, SPRN_PA6T_MER);
655SYSFS_SPRSETUP(ber, SPRN_PA6T_BER);
656SYSFS_SPRSETUP(ier, SPRN_PA6T_IER);
657SYSFS_SPRSETUP(sier, SPRN_PA6T_SIER);
658SYSFS_SPRSETUP(siar, SPRN_PA6T_SIAR);
659SYSFS_SPRSETUP(tsr0, SPRN_PA6T_TSR0);
660SYSFS_SPRSETUP(tsr1, SPRN_PA6T_TSR1);
661SYSFS_SPRSETUP(tsr2, SPRN_PA6T_TSR2);
662SYSFS_SPRSETUP(tsr3, SPRN_PA6T_TSR3);
663#endif /* HAS_PPC_PA6T */
664
665#ifdef HAS_PPC_PMC_IBM
666static 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
673static 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
681static 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)
696static 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
741static ssize_t show_svm(struct device *dev, struct device_attribute *attr, char *buf)
742{
743 return sprintf(buf, "%u\n", is_secure_guest());
744}
745static DEVICE_ATTR(svm, 0444, show_svm, NULL);
746
747static void __init create_svm_file(void)
748{
749 device_create_file(cpu_subsys.dev_root, &dev_attr_svm);
750}
751#else
752static void __init create_svm_file(void)
753{
754}
755#endif /* CONFIG_PPC_SVM */
756
757#ifdef CONFIG_PPC_PSERIES
758static void read_idle_purr(void *val)
759{
760 u64 *ret = val;
761
762 *ret = read_this_idle_purr();
763}
764
765static 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}
774static DEVICE_ATTR(idle_purr, 0400, idle_purr_show, NULL);
775
776static 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
782static 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
788static void read_idle_spurr(void *val)
789{
790 u64 *ret = val;
791
792 *ret = read_this_idle_spurr();
793}
794
795static 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}
804static DEVICE_ATTR(idle_spurr, 0400, idle_spurr_show, NULL);
805
806static 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
812static 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
825static 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
924static 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
1025ssize_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
1033ssize_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
1042static DEFINE_MUTEX(cpu_mutex);
1043
1044int 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}
1057EXPORT_SYMBOL_GPL(cpu_add_dev_attr);
1058
1059int 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}
1076EXPORT_SYMBOL_GPL(cpu_add_dev_attr_group);
1077
1078
1079void 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}
1091EXPORT_SYMBOL_GPL(cpu_remove_dev_attr);
1092
1093void 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}
1107EXPORT_SYMBOL_GPL(cpu_remove_dev_attr_group);
1108
1109
1110/* NUMA stuff */
1111
1112#ifdef CONFIG_NUMA
1113int 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}
1119EXPORT_SYMBOL_GPL(sysfs_add_device_to_node);
1120
1121void 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}
1126EXPORT_SYMBOL_GPL(sysfs_remove_device_from_node);
1127#endif
1128
1129/* Only valid if CPU is present. */
1130static 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}
1137static DEVICE_ATTR(physical_id, 0444, show_physical_id, NULL);
1138
1139static 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}
1175subsys_initcall(topology_init);