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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#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 struct device *dev_root;
221 int cpu;
222
223 dscr_default = spr_default_dscr;
224 for_each_possible_cpu(cpu)
225 paca_ptrs[cpu]->dscr_default = dscr_default;
226
227 dev_root = bus_get_dev_root(&cpu_subsys);
228 if (dev_root) {
229 device_create_file(dev_root, &dev_attr_dscr_default);
230 put_device(dev_root);
231 }
232 }
233}
234#endif /* CONFIG_PPC64 */
235
236#ifdef CONFIG_PPC_E500
237#define MAX_BIT 63
238
239static u64 pw20_wt;
240static u64 altivec_idle_wt;
241
242static unsigned int get_idle_ticks_bit(u64 ns)
243{
244 u64 cycle;
245
246 if (ns >= 10000)
247 cycle = div_u64(ns + 500, 1000) * tb_ticks_per_usec;
248 else
249 cycle = div_u64(ns * tb_ticks_per_usec, 1000);
250
251 if (!cycle)
252 return 0;
253
254 return ilog2(cycle);
255}
256
257static void do_show_pwrmgtcr0(void *val)
258{
259 u32 *value = val;
260
261 *value = mfspr(SPRN_PWRMGTCR0);
262}
263
264static ssize_t show_pw20_state(struct device *dev,
265 struct device_attribute *attr, char *buf)
266{
267 u32 value;
268 unsigned int cpu = dev->id;
269
270 smp_call_function_single(cpu, do_show_pwrmgtcr0, &value, 1);
271
272 value &= PWRMGTCR0_PW20_WAIT;
273
274 return sprintf(buf, "%u\n", value ? 1 : 0);
275}
276
277static void do_store_pw20_state(void *val)
278{
279 u32 *value = val;
280 u32 pw20_state;
281
282 pw20_state = mfspr(SPRN_PWRMGTCR0);
283
284 if (*value)
285 pw20_state |= PWRMGTCR0_PW20_WAIT;
286 else
287 pw20_state &= ~PWRMGTCR0_PW20_WAIT;
288
289 mtspr(SPRN_PWRMGTCR0, pw20_state);
290}
291
292static ssize_t store_pw20_state(struct device *dev,
293 struct device_attribute *attr,
294 const char *buf, size_t count)
295{
296 u32 value;
297 unsigned int cpu = dev->id;
298
299 if (kstrtou32(buf, 0, &value))
300 return -EINVAL;
301
302 if (value > 1)
303 return -EINVAL;
304
305 smp_call_function_single(cpu, do_store_pw20_state, &value, 1);
306
307 return count;
308}
309
310static ssize_t show_pw20_wait_time(struct device *dev,
311 struct device_attribute *attr, char *buf)
312{
313 u32 value;
314 u64 tb_cycle = 1;
315 u64 time;
316
317 unsigned int cpu = dev->id;
318
319 if (!pw20_wt) {
320 smp_call_function_single(cpu, do_show_pwrmgtcr0, &value, 1);
321 value = (value & PWRMGTCR0_PW20_ENT) >>
322 PWRMGTCR0_PW20_ENT_SHIFT;
323
324 tb_cycle = (tb_cycle << (MAX_BIT - value + 1));
325 /* convert ms to ns */
326 if (tb_ticks_per_usec > 1000) {
327 time = div_u64(tb_cycle, tb_ticks_per_usec / 1000);
328 } else {
329 u32 rem_us;
330
331 time = div_u64_rem(tb_cycle, tb_ticks_per_usec,
332 &rem_us);
333 time = time * 1000 + rem_us * 1000 / tb_ticks_per_usec;
334 }
335 } else {
336 time = pw20_wt;
337 }
338
339 return sprintf(buf, "%llu\n", time > 0 ? time : 0);
340}
341
342static void set_pw20_wait_entry_bit(void *val)
343{
344 u32 *value = val;
345 u32 pw20_idle;
346
347 pw20_idle = mfspr(SPRN_PWRMGTCR0);
348
349 /* Set Automatic PW20 Core Idle Count */
350 /* clear count */
351 pw20_idle &= ~PWRMGTCR0_PW20_ENT;
352
353 /* set count */
354 pw20_idle |= ((MAX_BIT - *value) << PWRMGTCR0_PW20_ENT_SHIFT);
355
356 mtspr(SPRN_PWRMGTCR0, pw20_idle);
357}
358
359static ssize_t store_pw20_wait_time(struct device *dev,
360 struct device_attribute *attr,
361 const char *buf, size_t count)
362{
363 u32 entry_bit;
364 u64 value;
365
366 unsigned int cpu = dev->id;
367
368 if (kstrtou64(buf, 0, &value))
369 return -EINVAL;
370
371 if (!value)
372 return -EINVAL;
373
374 entry_bit = get_idle_ticks_bit(value);
375 if (entry_bit > MAX_BIT)
376 return -EINVAL;
377
378 pw20_wt = value;
379
380 smp_call_function_single(cpu, set_pw20_wait_entry_bit,
381 &entry_bit, 1);
382
383 return count;
384}
385
386static ssize_t show_altivec_idle(struct device *dev,
387 struct device_attribute *attr, char *buf)
388{
389 u32 value;
390 unsigned int cpu = dev->id;
391
392 smp_call_function_single(cpu, do_show_pwrmgtcr0, &value, 1);
393
394 value &= PWRMGTCR0_AV_IDLE_PD_EN;
395
396 return sprintf(buf, "%u\n", value ? 1 : 0);
397}
398
399static void do_store_altivec_idle(void *val)
400{
401 u32 *value = val;
402 u32 altivec_idle;
403
404 altivec_idle = mfspr(SPRN_PWRMGTCR0);
405
406 if (*value)
407 altivec_idle |= PWRMGTCR0_AV_IDLE_PD_EN;
408 else
409 altivec_idle &= ~PWRMGTCR0_AV_IDLE_PD_EN;
410
411 mtspr(SPRN_PWRMGTCR0, altivec_idle);
412}
413
414static ssize_t store_altivec_idle(struct device *dev,
415 struct device_attribute *attr,
416 const char *buf, size_t count)
417{
418 u32 value;
419 unsigned int cpu = dev->id;
420
421 if (kstrtou32(buf, 0, &value))
422 return -EINVAL;
423
424 if (value > 1)
425 return -EINVAL;
426
427 smp_call_function_single(cpu, do_store_altivec_idle, &value, 1);
428
429 return count;
430}
431
432static ssize_t show_altivec_idle_wait_time(struct device *dev,
433 struct device_attribute *attr, char *buf)
434{
435 u32 value;
436 u64 tb_cycle = 1;
437 u64 time;
438
439 unsigned int cpu = dev->id;
440
441 if (!altivec_idle_wt) {
442 smp_call_function_single(cpu, do_show_pwrmgtcr0, &value, 1);
443 value = (value & PWRMGTCR0_AV_IDLE_CNT) >>
444 PWRMGTCR0_AV_IDLE_CNT_SHIFT;
445
446 tb_cycle = (tb_cycle << (MAX_BIT - value + 1));
447 /* convert ms to ns */
448 if (tb_ticks_per_usec > 1000) {
449 time = div_u64(tb_cycle, tb_ticks_per_usec / 1000);
450 } else {
451 u32 rem_us;
452
453 time = div_u64_rem(tb_cycle, tb_ticks_per_usec,
454 &rem_us);
455 time = time * 1000 + rem_us * 1000 / tb_ticks_per_usec;
456 }
457 } else {
458 time = altivec_idle_wt;
459 }
460
461 return sprintf(buf, "%llu\n", time > 0 ? time : 0);
462}
463
464static void set_altivec_idle_wait_entry_bit(void *val)
465{
466 u32 *value = val;
467 u32 altivec_idle;
468
469 altivec_idle = mfspr(SPRN_PWRMGTCR0);
470
471 /* Set Automatic AltiVec Idle Count */
472 /* clear count */
473 altivec_idle &= ~PWRMGTCR0_AV_IDLE_CNT;
474
475 /* set count */
476 altivec_idle |= ((MAX_BIT - *value) << PWRMGTCR0_AV_IDLE_CNT_SHIFT);
477
478 mtspr(SPRN_PWRMGTCR0, altivec_idle);
479}
480
481static ssize_t store_altivec_idle_wait_time(struct device *dev,
482 struct device_attribute *attr,
483 const char *buf, size_t count)
484{
485 u32 entry_bit;
486 u64 value;
487
488 unsigned int cpu = dev->id;
489
490 if (kstrtou64(buf, 0, &value))
491 return -EINVAL;
492
493 if (!value)
494 return -EINVAL;
495
496 entry_bit = get_idle_ticks_bit(value);
497 if (entry_bit > MAX_BIT)
498 return -EINVAL;
499
500 altivec_idle_wt = value;
501
502 smp_call_function_single(cpu, set_altivec_idle_wait_entry_bit,
503 &entry_bit, 1);
504
505 return count;
506}
507
508/*
509 * Enable/Disable interface:
510 * 0, disable. 1, enable.
511 */
512static DEVICE_ATTR(pw20_state, 0600, show_pw20_state, store_pw20_state);
513static DEVICE_ATTR(altivec_idle, 0600, show_altivec_idle, store_altivec_idle);
514
515/*
516 * Set wait time interface:(Nanosecond)
517 * Example: Base on TBfreq is 41MHZ.
518 * 1~48(ns): TB[63]
519 * 49~97(ns): TB[62]
520 * 98~195(ns): TB[61]
521 * 196~390(ns): TB[60]
522 * 391~780(ns): TB[59]
523 * 781~1560(ns): TB[58]
524 * ...
525 */
526static DEVICE_ATTR(pw20_wait_time, 0600,
527 show_pw20_wait_time,
528 store_pw20_wait_time);
529static DEVICE_ATTR(altivec_idle_wait_time, 0600,
530 show_altivec_idle_wait_time,
531 store_altivec_idle_wait_time);
532#endif
533
534/*
535 * Enabling PMCs will slow partition context switch times so we only do
536 * it the first time we write to the PMCs.
537 */
538
539static DEFINE_PER_CPU(char, pmcs_enabled);
540
541void ppc_enable_pmcs(void)
542{
543 ppc_set_pmu_inuse(1);
544
545 /* Only need to enable them once */
546 if (__this_cpu_read(pmcs_enabled))
547 return;
548
549 __this_cpu_write(pmcs_enabled, 1);
550
551 if (ppc_md.enable_pmcs)
552 ppc_md.enable_pmcs();
553}
554EXPORT_SYMBOL(ppc_enable_pmcs);
555
556
557
558/* Let's define all possible registers, we'll only hook up the ones
559 * that are implemented on the current processor
560 */
561
562#ifdef CONFIG_PMU_SYSFS
563#if defined(CONFIG_PPC64) || defined(CONFIG_PPC_BOOK3S_32)
564#define HAS_PPC_PMC_CLASSIC 1
565#define HAS_PPC_PMC_IBM 1
566#endif
567
568#ifdef CONFIG_PPC64
569#define HAS_PPC_PMC_PA6T 1
570#define HAS_PPC_PMC56 1
571#endif
572
573#ifdef CONFIG_PPC_BOOK3S_32
574#define HAS_PPC_PMC_G4 1
575#endif
576#endif /* CONFIG_PMU_SYSFS */
577
578#if defined(CONFIG_PPC64) && defined(CONFIG_DEBUG_MISC)
579#define HAS_PPC_PA6T
580#endif
581/*
582 * SPRs which are not related to PMU.
583 */
584#ifdef CONFIG_PPC64
585SYSFS_SPRSETUP(purr, SPRN_PURR);
586SYSFS_SPRSETUP(spurr, SPRN_SPURR);
587SYSFS_SPRSETUP(pir, SPRN_PIR);
588SYSFS_SPRSETUP(tscr, SPRN_TSCR);
589
590/*
591 Lets only enable read for phyp resources and
592 enable write when needed with a separate function.
593 Lets be conservative and default to pseries.
594*/
595static DEVICE_ATTR(spurr, 0400, show_spurr, NULL);
596static DEVICE_ATTR(purr, 0400, show_purr, store_purr);
597static DEVICE_ATTR(pir, 0400, show_pir, NULL);
598static DEVICE_ATTR(tscr, 0600, show_tscr, store_tscr);
599#endif /* CONFIG_PPC64 */
600
601#ifdef HAS_PPC_PMC_CLASSIC
602SYSFS_PMCSETUP(mmcr0, SPRN_MMCR0);
603SYSFS_PMCSETUP(mmcr1, SPRN_MMCR1);
604SYSFS_PMCSETUP(pmc1, SPRN_PMC1);
605SYSFS_PMCSETUP(pmc2, SPRN_PMC2);
606SYSFS_PMCSETUP(pmc3, SPRN_PMC3);
607SYSFS_PMCSETUP(pmc4, SPRN_PMC4);
608SYSFS_PMCSETUP(pmc5, SPRN_PMC5);
609SYSFS_PMCSETUP(pmc6, SPRN_PMC6);
610#endif
611
612#ifdef HAS_PPC_PMC_G4
613SYSFS_PMCSETUP(mmcr2, SPRN_MMCR2);
614#endif
615
616#ifdef HAS_PPC_PMC56
617SYSFS_PMCSETUP(pmc7, SPRN_PMC7);
618SYSFS_PMCSETUP(pmc8, SPRN_PMC8);
619
620SYSFS_PMCSETUP(mmcra, SPRN_MMCRA);
621SYSFS_PMCSETUP(mmcr3, SPRN_MMCR3);
622
623static DEVICE_ATTR(mmcra, 0600, show_mmcra, store_mmcra);
624static DEVICE_ATTR(mmcr3, 0600, show_mmcr3, store_mmcr3);
625#endif /* HAS_PPC_PMC56 */
626
627
628
629
630#ifdef HAS_PPC_PMC_PA6T
631SYSFS_PMCSETUP(pa6t_pmc0, SPRN_PA6T_PMC0);
632SYSFS_PMCSETUP(pa6t_pmc1, SPRN_PA6T_PMC1);
633SYSFS_PMCSETUP(pa6t_pmc2, SPRN_PA6T_PMC2);
634SYSFS_PMCSETUP(pa6t_pmc3, SPRN_PA6T_PMC3);
635SYSFS_PMCSETUP(pa6t_pmc4, SPRN_PA6T_PMC4);
636SYSFS_PMCSETUP(pa6t_pmc5, SPRN_PA6T_PMC5);
637#endif
638
639#ifdef HAS_PPC_PA6T
640SYSFS_SPRSETUP(hid0, SPRN_HID0);
641SYSFS_SPRSETUP(hid1, SPRN_HID1);
642SYSFS_SPRSETUP(hid4, SPRN_HID4);
643SYSFS_SPRSETUP(hid5, SPRN_HID5);
644SYSFS_SPRSETUP(ima0, SPRN_PA6T_IMA0);
645SYSFS_SPRSETUP(ima1, SPRN_PA6T_IMA1);
646SYSFS_SPRSETUP(ima2, SPRN_PA6T_IMA2);
647SYSFS_SPRSETUP(ima3, SPRN_PA6T_IMA3);
648SYSFS_SPRSETUP(ima4, SPRN_PA6T_IMA4);
649SYSFS_SPRSETUP(ima5, SPRN_PA6T_IMA5);
650SYSFS_SPRSETUP(ima6, SPRN_PA6T_IMA6);
651SYSFS_SPRSETUP(ima7, SPRN_PA6T_IMA7);
652SYSFS_SPRSETUP(ima8, SPRN_PA6T_IMA8);
653SYSFS_SPRSETUP(ima9, SPRN_PA6T_IMA9);
654SYSFS_SPRSETUP(imaat, SPRN_PA6T_IMAAT);
655SYSFS_SPRSETUP(btcr, SPRN_PA6T_BTCR);
656SYSFS_SPRSETUP(pccr, SPRN_PA6T_PCCR);
657SYSFS_SPRSETUP(rpccr, SPRN_PA6T_RPCCR);
658SYSFS_SPRSETUP(der, SPRN_PA6T_DER);
659SYSFS_SPRSETUP(mer, SPRN_PA6T_MER);
660SYSFS_SPRSETUP(ber, SPRN_PA6T_BER);
661SYSFS_SPRSETUP(ier, SPRN_PA6T_IER);
662SYSFS_SPRSETUP(sier, SPRN_PA6T_SIER);
663SYSFS_SPRSETUP(siar, SPRN_PA6T_SIAR);
664SYSFS_SPRSETUP(tsr0, SPRN_PA6T_TSR0);
665SYSFS_SPRSETUP(tsr1, SPRN_PA6T_TSR1);
666SYSFS_SPRSETUP(tsr2, SPRN_PA6T_TSR2);
667SYSFS_SPRSETUP(tsr3, SPRN_PA6T_TSR3);
668#endif /* HAS_PPC_PA6T */
669
670#ifdef HAS_PPC_PMC_IBM
671static struct device_attribute ibm_common_attrs[] = {
672 __ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0),
673 __ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1),
674};
675#endif /* HAS_PPC_PMC_IBM */
676
677#ifdef HAS_PPC_PMC_G4
678static struct device_attribute g4_common_attrs[] = {
679 __ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0),
680 __ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1),
681 __ATTR(mmcr2, 0600, show_mmcr2, store_mmcr2),
682};
683#endif /* HAS_PPC_PMC_G4 */
684
685#ifdef HAS_PPC_PMC_CLASSIC
686static struct device_attribute classic_pmc_attrs[] = {
687 __ATTR(pmc1, 0600, show_pmc1, store_pmc1),
688 __ATTR(pmc2, 0600, show_pmc2, store_pmc2),
689 __ATTR(pmc3, 0600, show_pmc3, store_pmc3),
690 __ATTR(pmc4, 0600, show_pmc4, store_pmc4),
691 __ATTR(pmc5, 0600, show_pmc5, store_pmc5),
692 __ATTR(pmc6, 0600, show_pmc6, store_pmc6),
693#ifdef HAS_PPC_PMC56
694 __ATTR(pmc7, 0600, show_pmc7, store_pmc7),
695 __ATTR(pmc8, 0600, show_pmc8, store_pmc8),
696#endif
697};
698#endif
699
700#if defined(HAS_PPC_PMC_PA6T) || defined(HAS_PPC_PA6T)
701static struct device_attribute pa6t_attrs[] = {
702#ifdef HAS_PPC_PMC_PA6T
703 __ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0),
704 __ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1),
705 __ATTR(pmc0, 0600, show_pa6t_pmc0, store_pa6t_pmc0),
706 __ATTR(pmc1, 0600, show_pa6t_pmc1, store_pa6t_pmc1),
707 __ATTR(pmc2, 0600, show_pa6t_pmc2, store_pa6t_pmc2),
708 __ATTR(pmc3, 0600, show_pa6t_pmc3, store_pa6t_pmc3),
709 __ATTR(pmc4, 0600, show_pa6t_pmc4, store_pa6t_pmc4),
710 __ATTR(pmc5, 0600, show_pa6t_pmc5, store_pa6t_pmc5),
711#endif
712#ifdef HAS_PPC_PA6T
713 __ATTR(hid0, 0600, show_hid0, store_hid0),
714 __ATTR(hid1, 0600, show_hid1, store_hid1),
715 __ATTR(hid4, 0600, show_hid4, store_hid4),
716 __ATTR(hid5, 0600, show_hid5, store_hid5),
717 __ATTR(ima0, 0600, show_ima0, store_ima0),
718 __ATTR(ima1, 0600, show_ima1, store_ima1),
719 __ATTR(ima2, 0600, show_ima2, store_ima2),
720 __ATTR(ima3, 0600, show_ima3, store_ima3),
721 __ATTR(ima4, 0600, show_ima4, store_ima4),
722 __ATTR(ima5, 0600, show_ima5, store_ima5),
723 __ATTR(ima6, 0600, show_ima6, store_ima6),
724 __ATTR(ima7, 0600, show_ima7, store_ima7),
725 __ATTR(ima8, 0600, show_ima8, store_ima8),
726 __ATTR(ima9, 0600, show_ima9, store_ima9),
727 __ATTR(imaat, 0600, show_imaat, store_imaat),
728 __ATTR(btcr, 0600, show_btcr, store_btcr),
729 __ATTR(pccr, 0600, show_pccr, store_pccr),
730 __ATTR(rpccr, 0600, show_rpccr, store_rpccr),
731 __ATTR(der, 0600, show_der, store_der),
732 __ATTR(mer, 0600, show_mer, store_mer),
733 __ATTR(ber, 0600, show_ber, store_ber),
734 __ATTR(ier, 0600, show_ier, store_ier),
735 __ATTR(sier, 0600, show_sier, store_sier),
736 __ATTR(siar, 0600, show_siar, store_siar),
737 __ATTR(tsr0, 0600, show_tsr0, store_tsr0),
738 __ATTR(tsr1, 0600, show_tsr1, store_tsr1),
739 __ATTR(tsr2, 0600, show_tsr2, store_tsr2),
740 __ATTR(tsr3, 0600, show_tsr3, store_tsr3),
741#endif /* HAS_PPC_PA6T */
742};
743#endif
744
745#ifdef CONFIG_PPC_SVM
746static ssize_t show_svm(struct device *dev, struct device_attribute *attr, char *buf)
747{
748 return sprintf(buf, "%u\n", is_secure_guest());
749}
750static DEVICE_ATTR(svm, 0444, show_svm, NULL);
751
752static void __init create_svm_file(void)
753{
754 struct device *dev_root = bus_get_dev_root(&cpu_subsys);
755
756 if (dev_root) {
757 device_create_file(dev_root, &dev_attr_svm);
758 put_device(dev_root);
759 }
760}
761#else
762static void __init create_svm_file(void)
763{
764}
765#endif /* CONFIG_PPC_SVM */
766
767#ifdef CONFIG_PPC_PSERIES
768static void read_idle_purr(void *val)
769{
770 u64 *ret = val;
771
772 *ret = read_this_idle_purr();
773}
774
775static ssize_t idle_purr_show(struct device *dev,
776 struct device_attribute *attr, char *buf)
777{
778 struct cpu *cpu = container_of(dev, struct cpu, dev);
779 u64 val;
780
781 smp_call_function_single(cpu->dev.id, read_idle_purr, &val, 1);
782 return sprintf(buf, "%llx\n", val);
783}
784static DEVICE_ATTR(idle_purr, 0400, idle_purr_show, NULL);
785
786static void create_idle_purr_file(struct device *s)
787{
788 if (firmware_has_feature(FW_FEATURE_LPAR))
789 device_create_file(s, &dev_attr_idle_purr);
790}
791
792static void remove_idle_purr_file(struct device *s)
793{
794 if (firmware_has_feature(FW_FEATURE_LPAR))
795 device_remove_file(s, &dev_attr_idle_purr);
796}
797
798static void read_idle_spurr(void *val)
799{
800 u64 *ret = val;
801
802 *ret = read_this_idle_spurr();
803}
804
805static ssize_t idle_spurr_show(struct device *dev,
806 struct device_attribute *attr, char *buf)
807{
808 struct cpu *cpu = container_of(dev, struct cpu, dev);
809 u64 val;
810
811 smp_call_function_single(cpu->dev.id, read_idle_spurr, &val, 1);
812 return sprintf(buf, "%llx\n", val);
813}
814static DEVICE_ATTR(idle_spurr, 0400, idle_spurr_show, NULL);
815
816static void create_idle_spurr_file(struct device *s)
817{
818 if (firmware_has_feature(FW_FEATURE_LPAR))
819 device_create_file(s, &dev_attr_idle_spurr);
820}
821
822static void remove_idle_spurr_file(struct device *s)
823{
824 if (firmware_has_feature(FW_FEATURE_LPAR))
825 device_remove_file(s, &dev_attr_idle_spurr);
826}
827
828#else /* CONFIG_PPC_PSERIES */
829#define create_idle_purr_file(s)
830#define remove_idle_purr_file(s)
831#define create_idle_spurr_file(s)
832#define remove_idle_spurr_file(s)
833#endif /* CONFIG_PPC_PSERIES */
834
835static int register_cpu_online(unsigned int cpu)
836{
837 struct cpu *c = &per_cpu(cpu_devices, cpu);
838 struct device *s = &c->dev;
839 struct device_attribute *attrs, *pmc_attrs;
840 int i, nattrs;
841
842 /* For cpus present at boot a reference was already grabbed in register_cpu() */
843 if (!s->of_node)
844 s->of_node = of_get_cpu_node(cpu, NULL);
845
846#ifdef CONFIG_PPC64
847 if (cpu_has_feature(CPU_FTR_SMT))
848 device_create_file(s, &dev_attr_smt_snooze_delay);
849#endif
850
851 /* PMC stuff */
852 switch (cur_cpu_spec->pmc_type) {
853#ifdef HAS_PPC_PMC_IBM
854 case PPC_PMC_IBM:
855 attrs = ibm_common_attrs;
856 nattrs = ARRAY_SIZE(ibm_common_attrs);
857 pmc_attrs = classic_pmc_attrs;
858 break;
859#endif /* HAS_PPC_PMC_IBM */
860#ifdef HAS_PPC_PMC_G4
861 case PPC_PMC_G4:
862 attrs = g4_common_attrs;
863 nattrs = ARRAY_SIZE(g4_common_attrs);
864 pmc_attrs = classic_pmc_attrs;
865 break;
866#endif /* HAS_PPC_PMC_G4 */
867#if defined(HAS_PPC_PMC_PA6T) || defined(HAS_PPC_PA6T)
868 case PPC_PMC_PA6T:
869 /* PA Semi starts counting at PMC0 */
870 attrs = pa6t_attrs;
871 nattrs = ARRAY_SIZE(pa6t_attrs);
872 pmc_attrs = NULL;
873 break;
874#endif
875 default:
876 attrs = NULL;
877 nattrs = 0;
878 pmc_attrs = NULL;
879 }
880
881 for (i = 0; i < nattrs; i++)
882 device_create_file(s, &attrs[i]);
883
884 if (pmc_attrs)
885 for (i = 0; i < cur_cpu_spec->num_pmcs; i++)
886 device_create_file(s, &pmc_attrs[i]);
887
888#ifdef CONFIG_PPC64
889#ifdef CONFIG_PMU_SYSFS
890 if (cpu_has_feature(CPU_FTR_MMCRA))
891 device_create_file(s, &dev_attr_mmcra);
892
893 if (cpu_has_feature(CPU_FTR_ARCH_31))
894 device_create_file(s, &dev_attr_mmcr3);
895#endif /* CONFIG_PMU_SYSFS */
896
897 if (cpu_has_feature(CPU_FTR_PURR)) {
898 if (!firmware_has_feature(FW_FEATURE_LPAR))
899 add_write_permission_dev_attr(&dev_attr_purr);
900 device_create_file(s, &dev_attr_purr);
901 create_idle_purr_file(s);
902 }
903
904 if (cpu_has_feature(CPU_FTR_SPURR)) {
905 device_create_file(s, &dev_attr_spurr);
906 create_idle_spurr_file(s);
907 }
908
909 if (cpu_has_feature(CPU_FTR_DSCR))
910 device_create_file(s, &dev_attr_dscr);
911
912 if (cpu_has_feature(CPU_FTR_PPCAS_ARCH_V2))
913 device_create_file(s, &dev_attr_pir);
914
915 if (cpu_has_feature(CPU_FTR_ARCH_206) &&
916 !firmware_has_feature(FW_FEATURE_LPAR))
917 device_create_file(s, &dev_attr_tscr);
918#endif /* CONFIG_PPC64 */
919
920#ifdef CONFIG_PPC_E500
921 if (PVR_VER(cur_cpu_spec->pvr_value) == PVR_VER_E6500) {
922 device_create_file(s, &dev_attr_pw20_state);
923 device_create_file(s, &dev_attr_pw20_wait_time);
924
925 device_create_file(s, &dev_attr_altivec_idle);
926 device_create_file(s, &dev_attr_altivec_idle_wait_time);
927 }
928#endif
929 cacheinfo_cpu_online(cpu);
930 return 0;
931}
932
933#ifdef CONFIG_HOTPLUG_CPU
934static int unregister_cpu_online(unsigned int cpu)
935{
936 struct cpu *c = &per_cpu(cpu_devices, cpu);
937 struct device *s = &c->dev;
938 struct device_attribute *attrs, *pmc_attrs;
939 int i, nattrs;
940
941 if (WARN_RATELIMIT(!c->hotpluggable, "cpu %d can't be offlined\n", cpu))
942 return -EBUSY;
943
944#ifdef CONFIG_PPC64
945 if (cpu_has_feature(CPU_FTR_SMT))
946 device_remove_file(s, &dev_attr_smt_snooze_delay);
947#endif
948
949 /* PMC stuff */
950 switch (cur_cpu_spec->pmc_type) {
951#ifdef HAS_PPC_PMC_IBM
952 case PPC_PMC_IBM:
953 attrs = ibm_common_attrs;
954 nattrs = ARRAY_SIZE(ibm_common_attrs);
955 pmc_attrs = classic_pmc_attrs;
956 break;
957#endif /* HAS_PPC_PMC_IBM */
958#ifdef HAS_PPC_PMC_G4
959 case PPC_PMC_G4:
960 attrs = g4_common_attrs;
961 nattrs = ARRAY_SIZE(g4_common_attrs);
962 pmc_attrs = classic_pmc_attrs;
963 break;
964#endif /* HAS_PPC_PMC_G4 */
965#if defined(HAS_PPC_PMC_PA6T) || defined(HAS_PPC_PA6T)
966 case PPC_PMC_PA6T:
967 /* PA Semi starts counting at PMC0 */
968 attrs = pa6t_attrs;
969 nattrs = ARRAY_SIZE(pa6t_attrs);
970 pmc_attrs = NULL;
971 break;
972#endif
973 default:
974 attrs = NULL;
975 nattrs = 0;
976 pmc_attrs = NULL;
977 }
978
979 for (i = 0; i < nattrs; i++)
980 device_remove_file(s, &attrs[i]);
981
982 if (pmc_attrs)
983 for (i = 0; i < cur_cpu_spec->num_pmcs; i++)
984 device_remove_file(s, &pmc_attrs[i]);
985
986#ifdef CONFIG_PPC64
987#ifdef CONFIG_PMU_SYSFS
988 if (cpu_has_feature(CPU_FTR_MMCRA))
989 device_remove_file(s, &dev_attr_mmcra);
990
991 if (cpu_has_feature(CPU_FTR_ARCH_31))
992 device_remove_file(s, &dev_attr_mmcr3);
993#endif /* CONFIG_PMU_SYSFS */
994
995 if (cpu_has_feature(CPU_FTR_PURR)) {
996 device_remove_file(s, &dev_attr_purr);
997 remove_idle_purr_file(s);
998 }
999
1000 if (cpu_has_feature(CPU_FTR_SPURR)) {
1001 device_remove_file(s, &dev_attr_spurr);
1002 remove_idle_spurr_file(s);
1003 }
1004
1005 if (cpu_has_feature(CPU_FTR_DSCR))
1006 device_remove_file(s, &dev_attr_dscr);
1007
1008 if (cpu_has_feature(CPU_FTR_PPCAS_ARCH_V2))
1009 device_remove_file(s, &dev_attr_pir);
1010
1011 if (cpu_has_feature(CPU_FTR_ARCH_206) &&
1012 !firmware_has_feature(FW_FEATURE_LPAR))
1013 device_remove_file(s, &dev_attr_tscr);
1014#endif /* CONFIG_PPC64 */
1015
1016#ifdef CONFIG_PPC_E500
1017 if (PVR_VER(cur_cpu_spec->pvr_value) == PVR_VER_E6500) {
1018 device_remove_file(s, &dev_attr_pw20_state);
1019 device_remove_file(s, &dev_attr_pw20_wait_time);
1020
1021 device_remove_file(s, &dev_attr_altivec_idle);
1022 device_remove_file(s, &dev_attr_altivec_idle_wait_time);
1023 }
1024#endif
1025 cacheinfo_cpu_offline(cpu);
1026 of_node_put(s->of_node);
1027 s->of_node = NULL;
1028 return 0;
1029}
1030#else /* !CONFIG_HOTPLUG_CPU */
1031#define unregister_cpu_online NULL
1032#endif
1033
1034#ifdef CONFIG_ARCH_CPU_PROBE_RELEASE
1035ssize_t arch_cpu_probe(const char *buf, size_t count)
1036{
1037 if (ppc_md.cpu_probe)
1038 return ppc_md.cpu_probe(buf, count);
1039
1040 return -EINVAL;
1041}
1042
1043ssize_t arch_cpu_release(const char *buf, size_t count)
1044{
1045 if (ppc_md.cpu_release)
1046 return ppc_md.cpu_release(buf, count);
1047
1048 return -EINVAL;
1049}
1050#endif /* CONFIG_ARCH_CPU_PROBE_RELEASE */
1051
1052static DEFINE_MUTEX(cpu_mutex);
1053
1054int cpu_add_dev_attr(struct device_attribute *attr)
1055{
1056 int cpu;
1057
1058 mutex_lock(&cpu_mutex);
1059
1060 for_each_possible_cpu(cpu) {
1061 device_create_file(get_cpu_device(cpu), attr);
1062 }
1063
1064 mutex_unlock(&cpu_mutex);
1065 return 0;
1066}
1067EXPORT_SYMBOL_GPL(cpu_add_dev_attr);
1068
1069int cpu_add_dev_attr_group(struct attribute_group *attrs)
1070{
1071 int cpu;
1072 struct device *dev;
1073 int ret;
1074
1075 mutex_lock(&cpu_mutex);
1076
1077 for_each_possible_cpu(cpu) {
1078 dev = get_cpu_device(cpu);
1079 ret = sysfs_create_group(&dev->kobj, attrs);
1080 WARN_ON(ret != 0);
1081 }
1082
1083 mutex_unlock(&cpu_mutex);
1084 return 0;
1085}
1086EXPORT_SYMBOL_GPL(cpu_add_dev_attr_group);
1087
1088
1089void cpu_remove_dev_attr(struct device_attribute *attr)
1090{
1091 int cpu;
1092
1093 mutex_lock(&cpu_mutex);
1094
1095 for_each_possible_cpu(cpu) {
1096 device_remove_file(get_cpu_device(cpu), attr);
1097 }
1098
1099 mutex_unlock(&cpu_mutex);
1100}
1101EXPORT_SYMBOL_GPL(cpu_remove_dev_attr);
1102
1103void cpu_remove_dev_attr_group(struct attribute_group *attrs)
1104{
1105 int cpu;
1106 struct device *dev;
1107
1108 mutex_lock(&cpu_mutex);
1109
1110 for_each_possible_cpu(cpu) {
1111 dev = get_cpu_device(cpu);
1112 sysfs_remove_group(&dev->kobj, attrs);
1113 }
1114
1115 mutex_unlock(&cpu_mutex);
1116}
1117EXPORT_SYMBOL_GPL(cpu_remove_dev_attr_group);
1118
1119
1120/* NUMA stuff */
1121
1122#ifdef CONFIG_NUMA
1123int sysfs_add_device_to_node(struct device *dev, int nid)
1124{
1125 struct node *node = node_devices[nid];
1126 return sysfs_create_link(&node->dev.kobj, &dev->kobj,
1127 kobject_name(&dev->kobj));
1128}
1129EXPORT_SYMBOL_GPL(sysfs_add_device_to_node);
1130
1131void sysfs_remove_device_from_node(struct device *dev, int nid)
1132{
1133 struct node *node = node_devices[nid];
1134 sysfs_remove_link(&node->dev.kobj, kobject_name(&dev->kobj));
1135}
1136EXPORT_SYMBOL_GPL(sysfs_remove_device_from_node);
1137#endif
1138
1139/* Only valid if CPU is present. */
1140static ssize_t show_physical_id(struct device *dev,
1141 struct device_attribute *attr, char *buf)
1142{
1143 struct cpu *cpu = container_of(dev, struct cpu, dev);
1144
1145 return sprintf(buf, "%d\n", get_hard_smp_processor_id(cpu->dev.id));
1146}
1147static DEVICE_ATTR(physical_id, 0444, show_physical_id, NULL);
1148
1149static int __init topology_init(void)
1150{
1151 int cpu, r;
1152
1153 for_each_possible_cpu(cpu) {
1154 struct cpu *c = &per_cpu(cpu_devices, cpu);
1155
1156#ifdef CONFIG_HOTPLUG_CPU
1157 /*
1158 * For now, we just see if the system supports making
1159 * the RTAS calls for CPU hotplug. But, there may be a
1160 * more comprehensive way to do this for an individual
1161 * CPU. For instance, the boot cpu might never be valid
1162 * for hotplugging.
1163 */
1164 if (smp_ops && smp_ops->cpu_offline_self)
1165 c->hotpluggable = 1;
1166#endif
1167
1168 if (cpu_online(cpu) || c->hotpluggable) {
1169 register_cpu(c, cpu);
1170
1171 device_create_file(&c->dev, &dev_attr_physical_id);
1172 }
1173 }
1174 r = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "powerpc/topology:online",
1175 register_cpu_online, unregister_cpu_online);
1176 WARN_ON(r < 0);
1177#ifdef CONFIG_PPC64
1178 sysfs_create_dscr_default();
1179#endif /* CONFIG_PPC64 */
1180
1181 create_svm_file();
1182
1183 return 0;
1184}
1185subsys_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
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/svm.h>
23
24#include "cacheinfo.h"
25#include "setup.h"
26
27#ifdef CONFIG_PPC64
28#include <asm/paca.h>
29#include <asm/lppaca.h>
30#endif
31
32static DEFINE_PER_CPU(struct cpu, cpu_devices);
33
34/*
35 * SMT snooze delay stuff, 64-bit only for now
36 */
37
38#ifdef CONFIG_PPC64
39
40/* Time in microseconds we delay before sleeping in the idle loop */
41static DEFINE_PER_CPU(long, smt_snooze_delay) = { 100 };
42
43static ssize_t store_smt_snooze_delay(struct device *dev,
44 struct device_attribute *attr,
45 const char *buf,
46 size_t count)
47{
48 struct cpu *cpu = container_of(dev, struct cpu, dev);
49 ssize_t ret;
50 long snooze;
51
52 ret = sscanf(buf, "%ld", &snooze);
53 if (ret != 1)
54 return -EINVAL;
55
56 per_cpu(smt_snooze_delay, cpu->dev.id) = snooze;
57 return count;
58}
59
60static ssize_t show_smt_snooze_delay(struct device *dev,
61 struct device_attribute *attr,
62 char *buf)
63{
64 struct cpu *cpu = container_of(dev, struct cpu, dev);
65
66 return sprintf(buf, "%ld\n", per_cpu(smt_snooze_delay, cpu->dev.id));
67}
68
69static DEVICE_ATTR(smt_snooze_delay, 0644, show_smt_snooze_delay,
70 store_smt_snooze_delay);
71
72static int __init setup_smt_snooze_delay(char *str)
73{
74 unsigned int cpu;
75 long snooze;
76
77 if (!cpu_has_feature(CPU_FTR_SMT))
78 return 1;
79
80 snooze = simple_strtol(str, NULL, 10);
81 for_each_possible_cpu(cpu)
82 per_cpu(smt_snooze_delay, cpu) = snooze;
83
84 return 1;
85}
86__setup("smt-snooze-delay=", setup_smt_snooze_delay);
87
88#endif /* CONFIG_PPC64 */
89
90#ifdef CONFIG_PPC_FSL_BOOK3E
91#define MAX_BIT 63
92
93static u64 pw20_wt;
94static u64 altivec_idle_wt;
95
96static unsigned int get_idle_ticks_bit(u64 ns)
97{
98 u64 cycle;
99
100 if (ns >= 10000)
101 cycle = div_u64(ns + 500, 1000) * tb_ticks_per_usec;
102 else
103 cycle = div_u64(ns * tb_ticks_per_usec, 1000);
104
105 if (!cycle)
106 return 0;
107
108 return ilog2(cycle);
109}
110
111static void do_show_pwrmgtcr0(void *val)
112{
113 u32 *value = val;
114
115 *value = mfspr(SPRN_PWRMGTCR0);
116}
117
118static ssize_t show_pw20_state(struct device *dev,
119 struct device_attribute *attr, char *buf)
120{
121 u32 value;
122 unsigned int cpu = dev->id;
123
124 smp_call_function_single(cpu, do_show_pwrmgtcr0, &value, 1);
125
126 value &= PWRMGTCR0_PW20_WAIT;
127
128 return sprintf(buf, "%u\n", value ? 1 : 0);
129}
130
131static void do_store_pw20_state(void *val)
132{
133 u32 *value = val;
134 u32 pw20_state;
135
136 pw20_state = mfspr(SPRN_PWRMGTCR0);
137
138 if (*value)
139 pw20_state |= PWRMGTCR0_PW20_WAIT;
140 else
141 pw20_state &= ~PWRMGTCR0_PW20_WAIT;
142
143 mtspr(SPRN_PWRMGTCR0, pw20_state);
144}
145
146static ssize_t store_pw20_state(struct device *dev,
147 struct device_attribute *attr,
148 const char *buf, size_t count)
149{
150 u32 value;
151 unsigned int cpu = dev->id;
152
153 if (kstrtou32(buf, 0, &value))
154 return -EINVAL;
155
156 if (value > 1)
157 return -EINVAL;
158
159 smp_call_function_single(cpu, do_store_pw20_state, &value, 1);
160
161 return count;
162}
163
164static ssize_t show_pw20_wait_time(struct device *dev,
165 struct device_attribute *attr, char *buf)
166{
167 u32 value;
168 u64 tb_cycle = 1;
169 u64 time;
170
171 unsigned int cpu = dev->id;
172
173 if (!pw20_wt) {
174 smp_call_function_single(cpu, do_show_pwrmgtcr0, &value, 1);
175 value = (value & PWRMGTCR0_PW20_ENT) >>
176 PWRMGTCR0_PW20_ENT_SHIFT;
177
178 tb_cycle = (tb_cycle << (MAX_BIT - value + 1));
179 /* convert ms to ns */
180 if (tb_ticks_per_usec > 1000) {
181 time = div_u64(tb_cycle, tb_ticks_per_usec / 1000);
182 } else {
183 u32 rem_us;
184
185 time = div_u64_rem(tb_cycle, tb_ticks_per_usec,
186 &rem_us);
187 time = time * 1000 + rem_us * 1000 / tb_ticks_per_usec;
188 }
189 } else {
190 time = pw20_wt;
191 }
192
193 return sprintf(buf, "%llu\n", time > 0 ? time : 0);
194}
195
196static void set_pw20_wait_entry_bit(void *val)
197{
198 u32 *value = val;
199 u32 pw20_idle;
200
201 pw20_idle = mfspr(SPRN_PWRMGTCR0);
202
203 /* Set Automatic PW20 Core Idle Count */
204 /* clear count */
205 pw20_idle &= ~PWRMGTCR0_PW20_ENT;
206
207 /* set count */
208 pw20_idle |= ((MAX_BIT - *value) << PWRMGTCR0_PW20_ENT_SHIFT);
209
210 mtspr(SPRN_PWRMGTCR0, pw20_idle);
211}
212
213static ssize_t store_pw20_wait_time(struct device *dev,
214 struct device_attribute *attr,
215 const char *buf, size_t count)
216{
217 u32 entry_bit;
218 u64 value;
219
220 unsigned int cpu = dev->id;
221
222 if (kstrtou64(buf, 0, &value))
223 return -EINVAL;
224
225 if (!value)
226 return -EINVAL;
227
228 entry_bit = get_idle_ticks_bit(value);
229 if (entry_bit > MAX_BIT)
230 return -EINVAL;
231
232 pw20_wt = value;
233
234 smp_call_function_single(cpu, set_pw20_wait_entry_bit,
235 &entry_bit, 1);
236
237 return count;
238}
239
240static ssize_t show_altivec_idle(struct device *dev,
241 struct device_attribute *attr, char *buf)
242{
243 u32 value;
244 unsigned int cpu = dev->id;
245
246 smp_call_function_single(cpu, do_show_pwrmgtcr0, &value, 1);
247
248 value &= PWRMGTCR0_AV_IDLE_PD_EN;
249
250 return sprintf(buf, "%u\n", value ? 1 : 0);
251}
252
253static void do_store_altivec_idle(void *val)
254{
255 u32 *value = val;
256 u32 altivec_idle;
257
258 altivec_idle = mfspr(SPRN_PWRMGTCR0);
259
260 if (*value)
261 altivec_idle |= PWRMGTCR0_AV_IDLE_PD_EN;
262 else
263 altivec_idle &= ~PWRMGTCR0_AV_IDLE_PD_EN;
264
265 mtspr(SPRN_PWRMGTCR0, altivec_idle);
266}
267
268static ssize_t store_altivec_idle(struct device *dev,
269 struct device_attribute *attr,
270 const char *buf, size_t count)
271{
272 u32 value;
273 unsigned int cpu = dev->id;
274
275 if (kstrtou32(buf, 0, &value))
276 return -EINVAL;
277
278 if (value > 1)
279 return -EINVAL;
280
281 smp_call_function_single(cpu, do_store_altivec_idle, &value, 1);
282
283 return count;
284}
285
286static ssize_t show_altivec_idle_wait_time(struct device *dev,
287 struct device_attribute *attr, char *buf)
288{
289 u32 value;
290 u64 tb_cycle = 1;
291 u64 time;
292
293 unsigned int cpu = dev->id;
294
295 if (!altivec_idle_wt) {
296 smp_call_function_single(cpu, do_show_pwrmgtcr0, &value, 1);
297 value = (value & PWRMGTCR0_AV_IDLE_CNT) >>
298 PWRMGTCR0_AV_IDLE_CNT_SHIFT;
299
300 tb_cycle = (tb_cycle << (MAX_BIT - value + 1));
301 /* convert ms to ns */
302 if (tb_ticks_per_usec > 1000) {
303 time = div_u64(tb_cycle, tb_ticks_per_usec / 1000);
304 } else {
305 u32 rem_us;
306
307 time = div_u64_rem(tb_cycle, tb_ticks_per_usec,
308 &rem_us);
309 time = time * 1000 + rem_us * 1000 / tb_ticks_per_usec;
310 }
311 } else {
312 time = altivec_idle_wt;
313 }
314
315 return sprintf(buf, "%llu\n", time > 0 ? time : 0);
316}
317
318static void set_altivec_idle_wait_entry_bit(void *val)
319{
320 u32 *value = val;
321 u32 altivec_idle;
322
323 altivec_idle = mfspr(SPRN_PWRMGTCR0);
324
325 /* Set Automatic AltiVec Idle Count */
326 /* clear count */
327 altivec_idle &= ~PWRMGTCR0_AV_IDLE_CNT;
328
329 /* set count */
330 altivec_idle |= ((MAX_BIT - *value) << PWRMGTCR0_AV_IDLE_CNT_SHIFT);
331
332 mtspr(SPRN_PWRMGTCR0, altivec_idle);
333}
334
335static ssize_t store_altivec_idle_wait_time(struct device *dev,
336 struct device_attribute *attr,
337 const char *buf, size_t count)
338{
339 u32 entry_bit;
340 u64 value;
341
342 unsigned int cpu = dev->id;
343
344 if (kstrtou64(buf, 0, &value))
345 return -EINVAL;
346
347 if (!value)
348 return -EINVAL;
349
350 entry_bit = get_idle_ticks_bit(value);
351 if (entry_bit > MAX_BIT)
352 return -EINVAL;
353
354 altivec_idle_wt = value;
355
356 smp_call_function_single(cpu, set_altivec_idle_wait_entry_bit,
357 &entry_bit, 1);
358
359 return count;
360}
361
362/*
363 * Enable/Disable interface:
364 * 0, disable. 1, enable.
365 */
366static DEVICE_ATTR(pw20_state, 0600, show_pw20_state, store_pw20_state);
367static DEVICE_ATTR(altivec_idle, 0600, show_altivec_idle, store_altivec_idle);
368
369/*
370 * Set wait time interface:(Nanosecond)
371 * Example: Base on TBfreq is 41MHZ.
372 * 1~48(ns): TB[63]
373 * 49~97(ns): TB[62]
374 * 98~195(ns): TB[61]
375 * 196~390(ns): TB[60]
376 * 391~780(ns): TB[59]
377 * 781~1560(ns): TB[58]
378 * ...
379 */
380static DEVICE_ATTR(pw20_wait_time, 0600,
381 show_pw20_wait_time,
382 store_pw20_wait_time);
383static DEVICE_ATTR(altivec_idle_wait_time, 0600,
384 show_altivec_idle_wait_time,
385 store_altivec_idle_wait_time);
386#endif
387
388/*
389 * Enabling PMCs will slow partition context switch times so we only do
390 * it the first time we write to the PMCs.
391 */
392
393static DEFINE_PER_CPU(char, pmcs_enabled);
394
395void ppc_enable_pmcs(void)
396{
397 ppc_set_pmu_inuse(1);
398
399 /* Only need to enable them once */
400 if (__this_cpu_read(pmcs_enabled))
401 return;
402
403 __this_cpu_write(pmcs_enabled, 1);
404
405 if (ppc_md.enable_pmcs)
406 ppc_md.enable_pmcs();
407}
408EXPORT_SYMBOL(ppc_enable_pmcs);
409
410#define __SYSFS_SPRSETUP_READ_WRITE(NAME, ADDRESS, EXTRA) \
411static void read_##NAME(void *val) \
412{ \
413 *(unsigned long *)val = mfspr(ADDRESS); \
414} \
415static void write_##NAME(void *val) \
416{ \
417 EXTRA; \
418 mtspr(ADDRESS, *(unsigned long *)val); \
419}
420
421#define __SYSFS_SPRSETUP_SHOW_STORE(NAME) \
422static ssize_t show_##NAME(struct device *dev, \
423 struct device_attribute *attr, \
424 char *buf) \
425{ \
426 struct cpu *cpu = container_of(dev, struct cpu, dev); \
427 unsigned long val; \
428 smp_call_function_single(cpu->dev.id, read_##NAME, &val, 1); \
429 return sprintf(buf, "%lx\n", val); \
430} \
431static ssize_t __used \
432 store_##NAME(struct device *dev, struct device_attribute *attr, \
433 const char *buf, size_t count) \
434{ \
435 struct cpu *cpu = container_of(dev, struct cpu, dev); \
436 unsigned long val; \
437 int ret = sscanf(buf, "%lx", &val); \
438 if (ret != 1) \
439 return -EINVAL; \
440 smp_call_function_single(cpu->dev.id, write_##NAME, &val, 1); \
441 return count; \
442}
443
444#define SYSFS_PMCSETUP(NAME, ADDRESS) \
445 __SYSFS_SPRSETUP_READ_WRITE(NAME, ADDRESS, ppc_enable_pmcs()) \
446 __SYSFS_SPRSETUP_SHOW_STORE(NAME)
447#define SYSFS_SPRSETUP(NAME, ADDRESS) \
448 __SYSFS_SPRSETUP_READ_WRITE(NAME, ADDRESS, ) \
449 __SYSFS_SPRSETUP_SHOW_STORE(NAME)
450
451#define SYSFS_SPRSETUP_SHOW_STORE(NAME) \
452 __SYSFS_SPRSETUP_SHOW_STORE(NAME)
453
454/* Let's define all possible registers, we'll only hook up the ones
455 * that are implemented on the current processor
456 */
457
458#if defined(CONFIG_PPC64)
459#define HAS_PPC_PMC_CLASSIC 1
460#define HAS_PPC_PMC_IBM 1
461#define HAS_PPC_PMC_PA6T 1
462#elif defined(CONFIG_PPC_BOOK3S_32)
463#define HAS_PPC_PMC_CLASSIC 1
464#define HAS_PPC_PMC_IBM 1
465#define HAS_PPC_PMC_G4 1
466#endif
467
468
469#ifdef HAS_PPC_PMC_CLASSIC
470SYSFS_PMCSETUP(mmcr0, SPRN_MMCR0);
471SYSFS_PMCSETUP(mmcr1, SPRN_MMCR1);
472SYSFS_PMCSETUP(pmc1, SPRN_PMC1);
473SYSFS_PMCSETUP(pmc2, SPRN_PMC2);
474SYSFS_PMCSETUP(pmc3, SPRN_PMC3);
475SYSFS_PMCSETUP(pmc4, SPRN_PMC4);
476SYSFS_PMCSETUP(pmc5, SPRN_PMC5);
477SYSFS_PMCSETUP(pmc6, SPRN_PMC6);
478
479#ifdef HAS_PPC_PMC_G4
480SYSFS_PMCSETUP(mmcr2, SPRN_MMCR2);
481#endif
482
483#ifdef CONFIG_PPC64
484SYSFS_PMCSETUP(pmc7, SPRN_PMC7);
485SYSFS_PMCSETUP(pmc8, SPRN_PMC8);
486
487SYSFS_PMCSETUP(mmcra, SPRN_MMCRA);
488SYSFS_SPRSETUP(purr, SPRN_PURR);
489SYSFS_SPRSETUP(spurr, SPRN_SPURR);
490SYSFS_SPRSETUP(pir, SPRN_PIR);
491SYSFS_SPRSETUP(tscr, SPRN_TSCR);
492
493/*
494 Lets only enable read for phyp resources and
495 enable write when needed with a separate function.
496 Lets be conservative and default to pseries.
497*/
498static DEVICE_ATTR(mmcra, 0600, show_mmcra, store_mmcra);
499static DEVICE_ATTR(spurr, 0400, show_spurr, NULL);
500static DEVICE_ATTR(purr, 0400, show_purr, store_purr);
501static DEVICE_ATTR(pir, 0400, show_pir, NULL);
502static DEVICE_ATTR(tscr, 0600, show_tscr, store_tscr);
503
504/*
505 * This is the system wide DSCR register default value. Any
506 * change to this default value through the sysfs interface
507 * will update all per cpu DSCR default values across the
508 * system stored in their respective PACA structures.
509 */
510static unsigned long dscr_default;
511
512/**
513 * read_dscr() - Fetch the cpu specific DSCR default
514 * @val: Returned cpu specific DSCR default value
515 *
516 * This function returns the per cpu DSCR default value
517 * for any cpu which is contained in it's PACA structure.
518 */
519static void read_dscr(void *val)
520{
521 *(unsigned long *)val = get_paca()->dscr_default;
522}
523
524
525/**
526 * write_dscr() - Update the cpu specific DSCR default
527 * @val: New cpu specific DSCR default value to update
528 *
529 * This function updates the per cpu DSCR default value
530 * for any cpu which is contained in it's PACA structure.
531 */
532static void write_dscr(void *val)
533{
534 get_paca()->dscr_default = *(unsigned long *)val;
535 if (!current->thread.dscr_inherit) {
536 current->thread.dscr = *(unsigned long *)val;
537 mtspr(SPRN_DSCR, *(unsigned long *)val);
538 }
539}
540
541SYSFS_SPRSETUP_SHOW_STORE(dscr);
542static DEVICE_ATTR(dscr, 0600, show_dscr, store_dscr);
543
544static void add_write_permission_dev_attr(struct device_attribute *attr)
545{
546 attr->attr.mode |= 0200;
547}
548
549/**
550 * show_dscr_default() - Fetch the system wide DSCR default
551 * @dev: Device structure
552 * @attr: Device attribute structure
553 * @buf: Interface buffer
554 *
555 * This function returns the system wide DSCR default value.
556 */
557static ssize_t show_dscr_default(struct device *dev,
558 struct device_attribute *attr, char *buf)
559{
560 return sprintf(buf, "%lx\n", dscr_default);
561}
562
563/**
564 * store_dscr_default() - Update the system wide DSCR default
565 * @dev: Device structure
566 * @attr: Device attribute structure
567 * @buf: Interface buffer
568 * @count: Size of the update
569 *
570 * This function updates the system wide DSCR default value.
571 */
572static ssize_t __used store_dscr_default(struct device *dev,
573 struct device_attribute *attr, const char *buf,
574 size_t count)
575{
576 unsigned long val;
577 int ret = 0;
578
579 ret = sscanf(buf, "%lx", &val);
580 if (ret != 1)
581 return -EINVAL;
582 dscr_default = val;
583
584 on_each_cpu(write_dscr, &val, 1);
585
586 return count;
587}
588
589static DEVICE_ATTR(dscr_default, 0600,
590 show_dscr_default, store_dscr_default);
591
592static void sysfs_create_dscr_default(void)
593{
594 if (cpu_has_feature(CPU_FTR_DSCR)) {
595 int err = 0;
596 int cpu;
597
598 dscr_default = spr_default_dscr;
599 for_each_possible_cpu(cpu)
600 paca_ptrs[cpu]->dscr_default = dscr_default;
601
602 err = device_create_file(cpu_subsys.dev_root, &dev_attr_dscr_default);
603 }
604}
605
606#endif /* CONFIG_PPC64 */
607
608#ifdef HAS_PPC_PMC_PA6T
609SYSFS_PMCSETUP(pa6t_pmc0, SPRN_PA6T_PMC0);
610SYSFS_PMCSETUP(pa6t_pmc1, SPRN_PA6T_PMC1);
611SYSFS_PMCSETUP(pa6t_pmc2, SPRN_PA6T_PMC2);
612SYSFS_PMCSETUP(pa6t_pmc3, SPRN_PA6T_PMC3);
613SYSFS_PMCSETUP(pa6t_pmc4, SPRN_PA6T_PMC4);
614SYSFS_PMCSETUP(pa6t_pmc5, SPRN_PA6T_PMC5);
615#ifdef CONFIG_DEBUG_MISC
616SYSFS_SPRSETUP(hid0, SPRN_HID0);
617SYSFS_SPRSETUP(hid1, SPRN_HID1);
618SYSFS_SPRSETUP(hid4, SPRN_HID4);
619SYSFS_SPRSETUP(hid5, SPRN_HID5);
620SYSFS_SPRSETUP(ima0, SPRN_PA6T_IMA0);
621SYSFS_SPRSETUP(ima1, SPRN_PA6T_IMA1);
622SYSFS_SPRSETUP(ima2, SPRN_PA6T_IMA2);
623SYSFS_SPRSETUP(ima3, SPRN_PA6T_IMA3);
624SYSFS_SPRSETUP(ima4, SPRN_PA6T_IMA4);
625SYSFS_SPRSETUP(ima5, SPRN_PA6T_IMA5);
626SYSFS_SPRSETUP(ima6, SPRN_PA6T_IMA6);
627SYSFS_SPRSETUP(ima7, SPRN_PA6T_IMA7);
628SYSFS_SPRSETUP(ima8, SPRN_PA6T_IMA8);
629SYSFS_SPRSETUP(ima9, SPRN_PA6T_IMA9);
630SYSFS_SPRSETUP(imaat, SPRN_PA6T_IMAAT);
631SYSFS_SPRSETUP(btcr, SPRN_PA6T_BTCR);
632SYSFS_SPRSETUP(pccr, SPRN_PA6T_PCCR);
633SYSFS_SPRSETUP(rpccr, SPRN_PA6T_RPCCR);
634SYSFS_SPRSETUP(der, SPRN_PA6T_DER);
635SYSFS_SPRSETUP(mer, SPRN_PA6T_MER);
636SYSFS_SPRSETUP(ber, SPRN_PA6T_BER);
637SYSFS_SPRSETUP(ier, SPRN_PA6T_IER);
638SYSFS_SPRSETUP(sier, SPRN_PA6T_SIER);
639SYSFS_SPRSETUP(siar, SPRN_PA6T_SIAR);
640SYSFS_SPRSETUP(tsr0, SPRN_PA6T_TSR0);
641SYSFS_SPRSETUP(tsr1, SPRN_PA6T_TSR1);
642SYSFS_SPRSETUP(tsr2, SPRN_PA6T_TSR2);
643SYSFS_SPRSETUP(tsr3, SPRN_PA6T_TSR3);
644#endif /* CONFIG_DEBUG_MISC */
645#endif /* HAS_PPC_PMC_PA6T */
646
647#ifdef HAS_PPC_PMC_IBM
648static struct device_attribute ibm_common_attrs[] = {
649 __ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0),
650 __ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1),
651};
652#endif /* HAS_PPC_PMC_G4 */
653
654#ifdef HAS_PPC_PMC_G4
655static struct device_attribute g4_common_attrs[] = {
656 __ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0),
657 __ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1),
658 __ATTR(mmcr2, 0600, show_mmcr2, store_mmcr2),
659};
660#endif /* HAS_PPC_PMC_G4 */
661
662static struct device_attribute classic_pmc_attrs[] = {
663 __ATTR(pmc1, 0600, show_pmc1, store_pmc1),
664 __ATTR(pmc2, 0600, show_pmc2, store_pmc2),
665 __ATTR(pmc3, 0600, show_pmc3, store_pmc3),
666 __ATTR(pmc4, 0600, show_pmc4, store_pmc4),
667 __ATTR(pmc5, 0600, show_pmc5, store_pmc5),
668 __ATTR(pmc6, 0600, show_pmc6, store_pmc6),
669#ifdef CONFIG_PPC64
670 __ATTR(pmc7, 0600, show_pmc7, store_pmc7),
671 __ATTR(pmc8, 0600, show_pmc8, store_pmc8),
672#endif
673};
674
675#ifdef HAS_PPC_PMC_PA6T
676static struct device_attribute pa6t_attrs[] = {
677 __ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0),
678 __ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1),
679 __ATTR(pmc0, 0600, show_pa6t_pmc0, store_pa6t_pmc0),
680 __ATTR(pmc1, 0600, show_pa6t_pmc1, store_pa6t_pmc1),
681 __ATTR(pmc2, 0600, show_pa6t_pmc2, store_pa6t_pmc2),
682 __ATTR(pmc3, 0600, show_pa6t_pmc3, store_pa6t_pmc3),
683 __ATTR(pmc4, 0600, show_pa6t_pmc4, store_pa6t_pmc4),
684 __ATTR(pmc5, 0600, show_pa6t_pmc5, store_pa6t_pmc5),
685#ifdef CONFIG_DEBUG_MISC
686 __ATTR(hid0, 0600, show_hid0, store_hid0),
687 __ATTR(hid1, 0600, show_hid1, store_hid1),
688 __ATTR(hid4, 0600, show_hid4, store_hid4),
689 __ATTR(hid5, 0600, show_hid5, store_hid5),
690 __ATTR(ima0, 0600, show_ima0, store_ima0),
691 __ATTR(ima1, 0600, show_ima1, store_ima1),
692 __ATTR(ima2, 0600, show_ima2, store_ima2),
693 __ATTR(ima3, 0600, show_ima3, store_ima3),
694 __ATTR(ima4, 0600, show_ima4, store_ima4),
695 __ATTR(ima5, 0600, show_ima5, store_ima5),
696 __ATTR(ima6, 0600, show_ima6, store_ima6),
697 __ATTR(ima7, 0600, show_ima7, store_ima7),
698 __ATTR(ima8, 0600, show_ima8, store_ima8),
699 __ATTR(ima9, 0600, show_ima9, store_ima9),
700 __ATTR(imaat, 0600, show_imaat, store_imaat),
701 __ATTR(btcr, 0600, show_btcr, store_btcr),
702 __ATTR(pccr, 0600, show_pccr, store_pccr),
703 __ATTR(rpccr, 0600, show_rpccr, store_rpccr),
704 __ATTR(der, 0600, show_der, store_der),
705 __ATTR(mer, 0600, show_mer, store_mer),
706 __ATTR(ber, 0600, show_ber, store_ber),
707 __ATTR(ier, 0600, show_ier, store_ier),
708 __ATTR(sier, 0600, show_sier, store_sier),
709 __ATTR(siar, 0600, show_siar, store_siar),
710 __ATTR(tsr0, 0600, show_tsr0, store_tsr0),
711 __ATTR(tsr1, 0600, show_tsr1, store_tsr1),
712 __ATTR(tsr2, 0600, show_tsr2, store_tsr2),
713 __ATTR(tsr3, 0600, show_tsr3, store_tsr3),
714#endif /* CONFIG_DEBUG_MISC */
715};
716#endif /* HAS_PPC_PMC_PA6T */
717#endif /* HAS_PPC_PMC_CLASSIC */
718
719#ifdef CONFIG_PPC_SVM
720static ssize_t show_svm(struct device *dev, struct device_attribute *attr, char *buf)
721{
722 return sprintf(buf, "%u\n", is_secure_guest());
723}
724static DEVICE_ATTR(svm, 0444, show_svm, NULL);
725
726static void create_svm_file(void)
727{
728 device_create_file(cpu_subsys.dev_root, &dev_attr_svm);
729}
730#else
731static void create_svm_file(void)
732{
733}
734#endif /* CONFIG_PPC_SVM */
735
736static int register_cpu_online(unsigned int cpu)
737{
738 struct cpu *c = &per_cpu(cpu_devices, cpu);
739 struct device *s = &c->dev;
740 struct device_attribute *attrs, *pmc_attrs;
741 int i, nattrs;
742
743 /* For cpus present at boot a reference was already grabbed in register_cpu() */
744 if (!s->of_node)
745 s->of_node = of_get_cpu_node(cpu, NULL);
746
747#ifdef CONFIG_PPC64
748 if (cpu_has_feature(CPU_FTR_SMT))
749 device_create_file(s, &dev_attr_smt_snooze_delay);
750#endif
751
752 /* PMC stuff */
753 switch (cur_cpu_spec->pmc_type) {
754#ifdef HAS_PPC_PMC_IBM
755 case PPC_PMC_IBM:
756 attrs = ibm_common_attrs;
757 nattrs = sizeof(ibm_common_attrs) / sizeof(struct device_attribute);
758 pmc_attrs = classic_pmc_attrs;
759 break;
760#endif /* HAS_PPC_PMC_IBM */
761#ifdef HAS_PPC_PMC_G4
762 case PPC_PMC_G4:
763 attrs = g4_common_attrs;
764 nattrs = sizeof(g4_common_attrs) / sizeof(struct device_attribute);
765 pmc_attrs = classic_pmc_attrs;
766 break;
767#endif /* HAS_PPC_PMC_G4 */
768#ifdef HAS_PPC_PMC_PA6T
769 case PPC_PMC_PA6T:
770 /* PA Semi starts counting at PMC0 */
771 attrs = pa6t_attrs;
772 nattrs = sizeof(pa6t_attrs) / sizeof(struct device_attribute);
773 pmc_attrs = NULL;
774 break;
775#endif /* HAS_PPC_PMC_PA6T */
776 default:
777 attrs = NULL;
778 nattrs = 0;
779 pmc_attrs = NULL;
780 }
781
782 for (i = 0; i < nattrs; i++)
783 device_create_file(s, &attrs[i]);
784
785 if (pmc_attrs)
786 for (i = 0; i < cur_cpu_spec->num_pmcs; i++)
787 device_create_file(s, &pmc_attrs[i]);
788
789#ifdef CONFIG_PPC64
790 if (cpu_has_feature(CPU_FTR_MMCRA))
791 device_create_file(s, &dev_attr_mmcra);
792
793 if (cpu_has_feature(CPU_FTR_PURR)) {
794 if (!firmware_has_feature(FW_FEATURE_LPAR))
795 add_write_permission_dev_attr(&dev_attr_purr);
796 device_create_file(s, &dev_attr_purr);
797 }
798
799 if (cpu_has_feature(CPU_FTR_SPURR))
800 device_create_file(s, &dev_attr_spurr);
801
802 if (cpu_has_feature(CPU_FTR_DSCR))
803 device_create_file(s, &dev_attr_dscr);
804
805 if (cpu_has_feature(CPU_FTR_PPCAS_ARCH_V2))
806 device_create_file(s, &dev_attr_pir);
807
808 if (cpu_has_feature(CPU_FTR_ARCH_206) &&
809 !firmware_has_feature(FW_FEATURE_LPAR))
810 device_create_file(s, &dev_attr_tscr);
811#endif /* CONFIG_PPC64 */
812
813#ifdef CONFIG_PPC_FSL_BOOK3E
814 if (PVR_VER(cur_cpu_spec->pvr_value) == PVR_VER_E6500) {
815 device_create_file(s, &dev_attr_pw20_state);
816 device_create_file(s, &dev_attr_pw20_wait_time);
817
818 device_create_file(s, &dev_attr_altivec_idle);
819 device_create_file(s, &dev_attr_altivec_idle_wait_time);
820 }
821#endif
822 cacheinfo_cpu_online(cpu);
823 return 0;
824}
825
826#ifdef CONFIG_HOTPLUG_CPU
827static int unregister_cpu_online(unsigned int cpu)
828{
829 struct cpu *c = &per_cpu(cpu_devices, cpu);
830 struct device *s = &c->dev;
831 struct device_attribute *attrs, *pmc_attrs;
832 int i, nattrs;
833
834 BUG_ON(!c->hotpluggable);
835
836#ifdef CONFIG_PPC64
837 if (cpu_has_feature(CPU_FTR_SMT))
838 device_remove_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 = sizeof(ibm_common_attrs) / sizeof(struct device_attribute);
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 = sizeof(g4_common_attrs) / sizeof(struct device_attribute);
854 pmc_attrs = classic_pmc_attrs;
855 break;
856#endif /* HAS_PPC_PMC_G4 */
857#ifdef HAS_PPC_PMC_PA6T
858 case PPC_PMC_PA6T:
859 /* PA Semi starts counting at PMC0 */
860 attrs = pa6t_attrs;
861 nattrs = sizeof(pa6t_attrs) / sizeof(struct device_attribute);
862 pmc_attrs = NULL;
863 break;
864#endif /* HAS_PPC_PMC_PA6T */
865 default:
866 attrs = NULL;
867 nattrs = 0;
868 pmc_attrs = NULL;
869 }
870
871 for (i = 0; i < nattrs; i++)
872 device_remove_file(s, &attrs[i]);
873
874 if (pmc_attrs)
875 for (i = 0; i < cur_cpu_spec->num_pmcs; i++)
876 device_remove_file(s, &pmc_attrs[i]);
877
878#ifdef CONFIG_PPC64
879 if (cpu_has_feature(CPU_FTR_MMCRA))
880 device_remove_file(s, &dev_attr_mmcra);
881
882 if (cpu_has_feature(CPU_FTR_PURR))
883 device_remove_file(s, &dev_attr_purr);
884
885 if (cpu_has_feature(CPU_FTR_SPURR))
886 device_remove_file(s, &dev_attr_spurr);
887
888 if (cpu_has_feature(CPU_FTR_DSCR))
889 device_remove_file(s, &dev_attr_dscr);
890
891 if (cpu_has_feature(CPU_FTR_PPCAS_ARCH_V2))
892 device_remove_file(s, &dev_attr_pir);
893
894 if (cpu_has_feature(CPU_FTR_ARCH_206) &&
895 !firmware_has_feature(FW_FEATURE_LPAR))
896 device_remove_file(s, &dev_attr_tscr);
897#endif /* CONFIG_PPC64 */
898
899#ifdef CONFIG_PPC_FSL_BOOK3E
900 if (PVR_VER(cur_cpu_spec->pvr_value) == PVR_VER_E6500) {
901 device_remove_file(s, &dev_attr_pw20_state);
902 device_remove_file(s, &dev_attr_pw20_wait_time);
903
904 device_remove_file(s, &dev_attr_altivec_idle);
905 device_remove_file(s, &dev_attr_altivec_idle_wait_time);
906 }
907#endif
908 cacheinfo_cpu_offline(cpu);
909 of_node_put(s->of_node);
910 s->of_node = NULL;
911 return 0;
912}
913#else /* !CONFIG_HOTPLUG_CPU */
914#define unregister_cpu_online NULL
915#endif
916
917#ifdef CONFIG_ARCH_CPU_PROBE_RELEASE
918ssize_t arch_cpu_probe(const char *buf, size_t count)
919{
920 if (ppc_md.cpu_probe)
921 return ppc_md.cpu_probe(buf, count);
922
923 return -EINVAL;
924}
925
926ssize_t arch_cpu_release(const char *buf, size_t count)
927{
928 if (ppc_md.cpu_release)
929 return ppc_md.cpu_release(buf, count);
930
931 return -EINVAL;
932}
933#endif /* CONFIG_ARCH_CPU_PROBE_RELEASE */
934
935static DEFINE_MUTEX(cpu_mutex);
936
937int cpu_add_dev_attr(struct device_attribute *attr)
938{
939 int cpu;
940
941 mutex_lock(&cpu_mutex);
942
943 for_each_possible_cpu(cpu) {
944 device_create_file(get_cpu_device(cpu), attr);
945 }
946
947 mutex_unlock(&cpu_mutex);
948 return 0;
949}
950EXPORT_SYMBOL_GPL(cpu_add_dev_attr);
951
952int cpu_add_dev_attr_group(struct attribute_group *attrs)
953{
954 int cpu;
955 struct device *dev;
956 int ret;
957
958 mutex_lock(&cpu_mutex);
959
960 for_each_possible_cpu(cpu) {
961 dev = get_cpu_device(cpu);
962 ret = sysfs_create_group(&dev->kobj, attrs);
963 WARN_ON(ret != 0);
964 }
965
966 mutex_unlock(&cpu_mutex);
967 return 0;
968}
969EXPORT_SYMBOL_GPL(cpu_add_dev_attr_group);
970
971
972void cpu_remove_dev_attr(struct device_attribute *attr)
973{
974 int cpu;
975
976 mutex_lock(&cpu_mutex);
977
978 for_each_possible_cpu(cpu) {
979 device_remove_file(get_cpu_device(cpu), attr);
980 }
981
982 mutex_unlock(&cpu_mutex);
983}
984EXPORT_SYMBOL_GPL(cpu_remove_dev_attr);
985
986void cpu_remove_dev_attr_group(struct attribute_group *attrs)
987{
988 int cpu;
989 struct device *dev;
990
991 mutex_lock(&cpu_mutex);
992
993 for_each_possible_cpu(cpu) {
994 dev = get_cpu_device(cpu);
995 sysfs_remove_group(&dev->kobj, attrs);
996 }
997
998 mutex_unlock(&cpu_mutex);
999}
1000EXPORT_SYMBOL_GPL(cpu_remove_dev_attr_group);
1001
1002
1003/* NUMA stuff */
1004
1005#ifdef CONFIG_NUMA
1006static void register_nodes(void)
1007{
1008 int i;
1009
1010 for (i = 0; i < MAX_NUMNODES; i++)
1011 register_one_node(i);
1012}
1013
1014int sysfs_add_device_to_node(struct device *dev, int nid)
1015{
1016 struct node *node = node_devices[nid];
1017 return sysfs_create_link(&node->dev.kobj, &dev->kobj,
1018 kobject_name(&dev->kobj));
1019}
1020EXPORT_SYMBOL_GPL(sysfs_add_device_to_node);
1021
1022void sysfs_remove_device_from_node(struct device *dev, int nid)
1023{
1024 struct node *node = node_devices[nid];
1025 sysfs_remove_link(&node->dev.kobj, kobject_name(&dev->kobj));
1026}
1027EXPORT_SYMBOL_GPL(sysfs_remove_device_from_node);
1028
1029#else
1030static void register_nodes(void)
1031{
1032 return;
1033}
1034
1035#endif
1036
1037/* Only valid if CPU is present. */
1038static ssize_t show_physical_id(struct device *dev,
1039 struct device_attribute *attr, char *buf)
1040{
1041 struct cpu *cpu = container_of(dev, struct cpu, dev);
1042
1043 return sprintf(buf, "%d\n", get_hard_smp_processor_id(cpu->dev.id));
1044}
1045static DEVICE_ATTR(physical_id, 0444, show_physical_id, NULL);
1046
1047static int __init topology_init(void)
1048{
1049 int cpu, r;
1050
1051 register_nodes();
1052
1053 for_each_possible_cpu(cpu) {
1054 struct cpu *c = &per_cpu(cpu_devices, cpu);
1055
1056 /*
1057 * For now, we just see if the system supports making
1058 * the RTAS calls for CPU hotplug. But, there may be a
1059 * more comprehensive way to do this for an individual
1060 * CPU. For instance, the boot cpu might never be valid
1061 * for hotplugging.
1062 */
1063 if (ppc_md.cpu_die)
1064 c->hotpluggable = 1;
1065
1066 if (cpu_online(cpu) || c->hotpluggable) {
1067 register_cpu(c, cpu);
1068
1069 device_create_file(&c->dev, &dev_attr_physical_id);
1070 }
1071 }
1072 r = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "powerpc/topology:online",
1073 register_cpu_online, unregister_cpu_online);
1074 WARN_ON(r < 0);
1075#ifdef CONFIG_PPC64
1076 sysfs_create_dscr_default();
1077#endif /* CONFIG_PPC64 */
1078
1079 create_svm_file();
1080
1081 return 0;
1082}
1083subsys_initcall(topology_init);