1#include <linux/device.h>
2#include <linux/cpu.h>
3#include <linux/smp.h>
4#include <linux/percpu.h>
5#include <linux/init.h>
6#include <linux/sched.h>
7#include <linux/export.h>
8#include <linux/nodemask.h>
9#include <linux/cpumask.h>
10#include <linux/notifier.h>
11
12#include <asm/current.h>
13#include <asm/processor.h>
14#include <asm/cputable.h>
15#include <asm/hvcall.h>
16#include <asm/prom.h>
17#include <asm/machdep.h>
18#include <asm/smp.h>
19#include <asm/pmc.h>
20
21#include "cacheinfo.h"
22
23#ifdef CONFIG_PPC64
24#include <asm/paca.h>
25#include <asm/lppaca.h>
26#endif
27
28static DEFINE_PER_CPU(struct cpu, cpu_devices);
29
30
31
32
33
34#ifdef CONFIG_PPC64
35
36
37DEFINE_PER_CPU(long, smt_snooze_delay) = { 100 };
38
39static ssize_t store_smt_snooze_delay(struct device *dev,
40 struct device_attribute *attr,
41 const char *buf,
42 size_t count)
43{
44 struct cpu *cpu = container_of(dev, struct cpu, dev);
45 ssize_t ret;
46 long snooze;
47
48 ret = sscanf(buf, "%ld", &snooze);
49 if (ret != 1)
50 return -EINVAL;
51
52 per_cpu(smt_snooze_delay, cpu->dev.id) = snooze;
53 update_smt_snooze_delay(cpu->dev.id, snooze);
54
55 return count;
56}
57
58static ssize_t show_smt_snooze_delay(struct device *dev,
59 struct device_attribute *attr,
60 char *buf)
61{
62 struct cpu *cpu = container_of(dev, struct cpu, dev);
63
64 return sprintf(buf, "%ld\n", per_cpu(smt_snooze_delay, cpu->dev.id));
65}
66
67static DEVICE_ATTR(smt_snooze_delay, 0644, show_smt_snooze_delay,
68 store_smt_snooze_delay);
69
70static int __init setup_smt_snooze_delay(char *str)
71{
72 unsigned int cpu;
73 long snooze;
74
75 if (!cpu_has_feature(CPU_FTR_SMT))
76 return 1;
77
78 snooze = simple_strtol(str, NULL, 10);
79 for_each_possible_cpu(cpu)
80 per_cpu(smt_snooze_delay, cpu) = snooze;
81
82 return 1;
83}
84__setup("smt-snooze-delay=", setup_smt_snooze_delay);
85
86#endif
87
88
89
90
91
92
93static DEFINE_PER_CPU(char, pmcs_enabled);
94
95void ppc_enable_pmcs(void)
96{
97 ppc_set_pmu_inuse(1);
98
99
100 if (__get_cpu_var(pmcs_enabled))
101 return;
102
103 __get_cpu_var(pmcs_enabled) = 1;
104
105 if (ppc_md.enable_pmcs)
106 ppc_md.enable_pmcs();
107}
108EXPORT_SYMBOL(ppc_enable_pmcs);
109
110#define SYSFS_PMCSETUP(NAME, ADDRESS) \
111static void read_##NAME(void *val) \
112{ \
113 *(unsigned long *)val = mfspr(ADDRESS); \
114} \
115static void write_##NAME(void *val) \
116{ \
117 ppc_enable_pmcs(); \
118 mtspr(ADDRESS, *(unsigned long *)val); \
119} \
120static ssize_t show_##NAME(struct device *dev, \
121 struct device_attribute *attr, \
122 char *buf) \
123{ \
124 struct cpu *cpu = container_of(dev, struct cpu, dev); \
125 unsigned long val; \
126 smp_call_function_single(cpu->dev.id, read_##NAME, &val, 1); \
127 return sprintf(buf, "%lx\n", val); \
128} \
129static ssize_t __used \
130 store_##NAME(struct device *dev, struct device_attribute *attr, \
131 const char *buf, size_t count) \
132{ \
133 struct cpu *cpu = container_of(dev, struct cpu, dev); \
134 unsigned long val; \
135 int ret = sscanf(buf, "%lx", &val); \
136 if (ret != 1) \
137 return -EINVAL; \
138 smp_call_function_single(cpu->dev.id, write_##NAME, &val, 1); \
139 return count; \
140}
141
142
143
144
145
146
147#if defined(CONFIG_PPC64)
148#define HAS_PPC_PMC_CLASSIC 1
149#define HAS_PPC_PMC_IBM 1
150#define HAS_PPC_PMC_PA6T 1
151#elif defined(CONFIG_6xx)
152#define HAS_PPC_PMC_CLASSIC 1
153#define HAS_PPC_PMC_IBM 1
154#define HAS_PPC_PMC_G4 1
155#endif
156
157
158#ifdef HAS_PPC_PMC_CLASSIC
159SYSFS_PMCSETUP(mmcr0, SPRN_MMCR0);
160SYSFS_PMCSETUP(mmcr1, SPRN_MMCR1);
161SYSFS_PMCSETUP(pmc1, SPRN_PMC1);
162SYSFS_PMCSETUP(pmc2, SPRN_PMC2);
163SYSFS_PMCSETUP(pmc3, SPRN_PMC3);
164SYSFS_PMCSETUP(pmc4, SPRN_PMC4);
165SYSFS_PMCSETUP(pmc5, SPRN_PMC5);
166SYSFS_PMCSETUP(pmc6, SPRN_PMC6);
167
168#ifdef HAS_PPC_PMC_G4
169SYSFS_PMCSETUP(mmcr2, SPRN_MMCR2);
170#endif
171
172#ifdef CONFIG_PPC64
173SYSFS_PMCSETUP(pmc7, SPRN_PMC7);
174SYSFS_PMCSETUP(pmc8, SPRN_PMC8);
175
176SYSFS_PMCSETUP(mmcra, SPRN_MMCRA);
177SYSFS_PMCSETUP(purr, SPRN_PURR);
178SYSFS_PMCSETUP(spurr, SPRN_SPURR);
179SYSFS_PMCSETUP(dscr, SPRN_DSCR);
180SYSFS_PMCSETUP(pir, SPRN_PIR);
181
182static DEVICE_ATTR(mmcra, 0600, show_mmcra, store_mmcra);
183static DEVICE_ATTR(spurr, 0400, show_spurr, NULL);
184static DEVICE_ATTR(dscr, 0600, show_dscr, store_dscr);
185static DEVICE_ATTR(purr, 0600, show_purr, store_purr);
186static DEVICE_ATTR(pir, 0400, show_pir, NULL);
187
188unsigned long dscr_default = 0;
189EXPORT_SYMBOL(dscr_default);
190
191static ssize_t show_dscr_default(struct device *dev,
192 struct device_attribute *attr, char *buf)
193{
194 return sprintf(buf, "%lx\n", dscr_default);
195}
196
197static void update_dscr(void *dummy)
198{
199 if (!current->thread.dscr_inherit) {
200 current->thread.dscr = dscr_default;
201 mtspr(SPRN_DSCR, dscr_default);
202 }
203}
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(update_dscr, NULL, 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 int err = 0;
228 if (cpu_has_feature(CPU_FTR_DSCR))
229 err = device_create_file(cpu_subsys.dev_root, &dev_attr_dscr_default);
230}
231#endif
232
233#ifdef HAS_PPC_PMC_PA6T
234SYSFS_PMCSETUP(pa6t_pmc0, SPRN_PA6T_PMC0);
235SYSFS_PMCSETUP(pa6t_pmc1, SPRN_PA6T_PMC1);
236SYSFS_PMCSETUP(pa6t_pmc2, SPRN_PA6T_PMC2);
237SYSFS_PMCSETUP(pa6t_pmc3, SPRN_PA6T_PMC3);
238SYSFS_PMCSETUP(pa6t_pmc4, SPRN_PA6T_PMC4);
239SYSFS_PMCSETUP(pa6t_pmc5, SPRN_PA6T_PMC5);
240#ifdef CONFIG_DEBUG_KERNEL
241SYSFS_PMCSETUP(hid0, SPRN_HID0);
242SYSFS_PMCSETUP(hid1, SPRN_HID1);
243SYSFS_PMCSETUP(hid4, SPRN_HID4);
244SYSFS_PMCSETUP(hid5, SPRN_HID5);
245SYSFS_PMCSETUP(ima0, SPRN_PA6T_IMA0);
246SYSFS_PMCSETUP(ima1, SPRN_PA6T_IMA1);
247SYSFS_PMCSETUP(ima2, SPRN_PA6T_IMA2);
248SYSFS_PMCSETUP(ima3, SPRN_PA6T_IMA3);
249SYSFS_PMCSETUP(ima4, SPRN_PA6T_IMA4);
250SYSFS_PMCSETUP(ima5, SPRN_PA6T_IMA5);
251SYSFS_PMCSETUP(ima6, SPRN_PA6T_IMA6);
252SYSFS_PMCSETUP(ima7, SPRN_PA6T_IMA7);
253SYSFS_PMCSETUP(ima8, SPRN_PA6T_IMA8);
254SYSFS_PMCSETUP(ima9, SPRN_PA6T_IMA9);
255SYSFS_PMCSETUP(imaat, SPRN_PA6T_IMAAT);
256SYSFS_PMCSETUP(btcr, SPRN_PA6T_BTCR);
257SYSFS_PMCSETUP(pccr, SPRN_PA6T_PCCR);
258SYSFS_PMCSETUP(rpccr, SPRN_PA6T_RPCCR);
259SYSFS_PMCSETUP(der, SPRN_PA6T_DER);
260SYSFS_PMCSETUP(mer, SPRN_PA6T_MER);
261SYSFS_PMCSETUP(ber, SPRN_PA6T_BER);
262SYSFS_PMCSETUP(ier, SPRN_PA6T_IER);
263SYSFS_PMCSETUP(sier, SPRN_PA6T_SIER);
264SYSFS_PMCSETUP(siar, SPRN_PA6T_SIAR);
265SYSFS_PMCSETUP(tsr0, SPRN_PA6T_TSR0);
266SYSFS_PMCSETUP(tsr1, SPRN_PA6T_TSR1);
267SYSFS_PMCSETUP(tsr2, SPRN_PA6T_TSR2);
268SYSFS_PMCSETUP(tsr3, SPRN_PA6T_TSR3);
269#endif
270#endif
271
272#ifdef HAS_PPC_PMC_IBM
273static struct device_attribute ibm_common_attrs[] = {
274 __ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0),
275 __ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1),
276};
277#endif
278
279#ifdef HAS_PPC_PMC_G4
280static struct device_attribute g4_common_attrs[] = {
281 __ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0),
282 __ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1),
283 __ATTR(mmcr2, 0600, show_mmcr2, store_mmcr2),
284};
285#endif
286
287static struct device_attribute classic_pmc_attrs[] = {
288 __ATTR(pmc1, 0600, show_pmc1, store_pmc1),
289 __ATTR(pmc2, 0600, show_pmc2, store_pmc2),
290 __ATTR(pmc3, 0600, show_pmc3, store_pmc3),
291 __ATTR(pmc4, 0600, show_pmc4, store_pmc4),
292 __ATTR(pmc5, 0600, show_pmc5, store_pmc5),
293 __ATTR(pmc6, 0600, show_pmc6, store_pmc6),
294#ifdef CONFIG_PPC64
295 __ATTR(pmc7, 0600, show_pmc7, store_pmc7),
296 __ATTR(pmc8, 0600, show_pmc8, store_pmc8),
297#endif
298};
299
300#ifdef HAS_PPC_PMC_PA6T
301static struct device_attribute pa6t_attrs[] = {
302 __ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0),
303 __ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1),
304 __ATTR(pmc0, 0600, show_pa6t_pmc0, store_pa6t_pmc0),
305 __ATTR(pmc1, 0600, show_pa6t_pmc1, store_pa6t_pmc1),
306 __ATTR(pmc2, 0600, show_pa6t_pmc2, store_pa6t_pmc2),
307 __ATTR(pmc3, 0600, show_pa6t_pmc3, store_pa6t_pmc3),
308 __ATTR(pmc4, 0600, show_pa6t_pmc4, store_pa6t_pmc4),
309 __ATTR(pmc5, 0600, show_pa6t_pmc5, store_pa6t_pmc5),
310#ifdef CONFIG_DEBUG_KERNEL
311 __ATTR(hid0, 0600, show_hid0, store_hid0),
312 __ATTR(hid1, 0600, show_hid1, store_hid1),
313 __ATTR(hid4, 0600, show_hid4, store_hid4),
314 __ATTR(hid5, 0600, show_hid5, store_hid5),
315 __ATTR(ima0, 0600, show_ima0, store_ima0),
316 __ATTR(ima1, 0600, show_ima1, store_ima1),
317 __ATTR(ima2, 0600, show_ima2, store_ima2),
318 __ATTR(ima3, 0600, show_ima3, store_ima3),
319 __ATTR(ima4, 0600, show_ima4, store_ima4),
320 __ATTR(ima5, 0600, show_ima5, store_ima5),
321 __ATTR(ima6, 0600, show_ima6, store_ima6),
322 __ATTR(ima7, 0600, show_ima7, store_ima7),
323 __ATTR(ima8, 0600, show_ima8, store_ima8),
324 __ATTR(ima9, 0600, show_ima9, store_ima9),
325 __ATTR(imaat, 0600, show_imaat, store_imaat),
326 __ATTR(btcr, 0600, show_btcr, store_btcr),
327 __ATTR(pccr, 0600, show_pccr, store_pccr),
328 __ATTR(rpccr, 0600, show_rpccr, store_rpccr),
329 __ATTR(der, 0600, show_der, store_der),
330 __ATTR(mer, 0600, show_mer, store_mer),
331 __ATTR(ber, 0600, show_ber, store_ber),
332 __ATTR(ier, 0600, show_ier, store_ier),
333 __ATTR(sier, 0600, show_sier, store_sier),
334 __ATTR(siar, 0600, show_siar, store_siar),
335 __ATTR(tsr0, 0600, show_tsr0, store_tsr0),
336 __ATTR(tsr1, 0600, show_tsr1, store_tsr1),
337 __ATTR(tsr2, 0600, show_tsr2, store_tsr2),
338 __ATTR(tsr3, 0600, show_tsr3, store_tsr3),
339#endif
340};
341#endif
342#endif
343
344static void register_cpu_online(unsigned int cpu)
345{
346 struct cpu *c = &per_cpu(cpu_devices, cpu);
347 struct device *s = &c->dev;
348 struct device_attribute *attrs, *pmc_attrs;
349 int i, nattrs;
350
351#ifdef CONFIG_PPC64
352 if (cpu_has_feature(CPU_FTR_SMT))
353 device_create_file(s, &dev_attr_smt_snooze_delay);
354#endif
355
356
357 switch (cur_cpu_spec->pmc_type) {
358#ifdef HAS_PPC_PMC_IBM
359 case PPC_PMC_IBM:
360 attrs = ibm_common_attrs;
361 nattrs = sizeof(ibm_common_attrs) / sizeof(struct device_attribute);
362 pmc_attrs = classic_pmc_attrs;
363 break;
364#endif
365#ifdef HAS_PPC_PMC_G4
366 case PPC_PMC_G4:
367 attrs = g4_common_attrs;
368 nattrs = sizeof(g4_common_attrs) / sizeof(struct device_attribute);
369 pmc_attrs = classic_pmc_attrs;
370 break;
371#endif
372#ifdef HAS_PPC_PMC_PA6T
373 case PPC_PMC_PA6T:
374
375 attrs = pa6t_attrs;
376 nattrs = sizeof(pa6t_attrs) / sizeof(struct device_attribute);
377 pmc_attrs = NULL;
378 break;
379#endif
380 default:
381 attrs = NULL;
382 nattrs = 0;
383 pmc_attrs = NULL;
384 }
385
386 for (i = 0; i < nattrs; i++)
387 device_create_file(s, &attrs[i]);
388
389 if (pmc_attrs)
390 for (i = 0; i < cur_cpu_spec->num_pmcs; i++)
391 device_create_file(s, &pmc_attrs[i]);
392
393#ifdef CONFIG_PPC64
394 if (cpu_has_feature(CPU_FTR_MMCRA))
395 device_create_file(s, &dev_attr_mmcra);
396
397 if (cpu_has_feature(CPU_FTR_PURR))
398 device_create_file(s, &dev_attr_purr);
399
400 if (cpu_has_feature(CPU_FTR_SPURR))
401 device_create_file(s, &dev_attr_spurr);
402
403 if (cpu_has_feature(CPU_FTR_DSCR))
404 device_create_file(s, &dev_attr_dscr);
405
406 if (cpu_has_feature(CPU_FTR_PPCAS_ARCH_V2))
407 device_create_file(s, &dev_attr_pir);
408#endif
409
410 cacheinfo_cpu_online(cpu);
411}
412
413#ifdef CONFIG_HOTPLUG_CPU
414static void unregister_cpu_online(unsigned int cpu)
415{
416 struct cpu *c = &per_cpu(cpu_devices, cpu);
417 struct device *s = &c->dev;
418 struct device_attribute *attrs, *pmc_attrs;
419 int i, nattrs;
420
421 BUG_ON(!c->hotpluggable);
422
423#ifdef CONFIG_PPC64
424 if (cpu_has_feature(CPU_FTR_SMT))
425 device_remove_file(s, &dev_attr_smt_snooze_delay);
426#endif
427
428
429 switch (cur_cpu_spec->pmc_type) {
430#ifdef HAS_PPC_PMC_IBM
431 case PPC_PMC_IBM:
432 attrs = ibm_common_attrs;
433 nattrs = sizeof(ibm_common_attrs) / sizeof(struct device_attribute);
434 pmc_attrs = classic_pmc_attrs;
435 break;
436#endif
437#ifdef HAS_PPC_PMC_G4
438 case PPC_PMC_G4:
439 attrs = g4_common_attrs;
440 nattrs = sizeof(g4_common_attrs) / sizeof(struct device_attribute);
441 pmc_attrs = classic_pmc_attrs;
442 break;
443#endif
444#ifdef HAS_PPC_PMC_PA6T
445 case PPC_PMC_PA6T:
446
447 attrs = pa6t_attrs;
448 nattrs = sizeof(pa6t_attrs) / sizeof(struct device_attribute);
449 pmc_attrs = NULL;
450 break;
451#endif
452 default:
453 attrs = NULL;
454 nattrs = 0;
455 pmc_attrs = NULL;
456 }
457
458 for (i = 0; i < nattrs; i++)
459 device_remove_file(s, &attrs[i]);
460
461 if (pmc_attrs)
462 for (i = 0; i < cur_cpu_spec->num_pmcs; i++)
463 device_remove_file(s, &pmc_attrs[i]);
464
465#ifdef CONFIG_PPC64
466 if (cpu_has_feature(CPU_FTR_MMCRA))
467 device_remove_file(s, &dev_attr_mmcra);
468
469 if (cpu_has_feature(CPU_FTR_PURR))
470 device_remove_file(s, &dev_attr_purr);
471
472 if (cpu_has_feature(CPU_FTR_SPURR))
473 device_remove_file(s, &dev_attr_spurr);
474
475 if (cpu_has_feature(CPU_FTR_DSCR))
476 device_remove_file(s, &dev_attr_dscr);
477
478 if (cpu_has_feature(CPU_FTR_PPCAS_ARCH_V2))
479 device_remove_file(s, &dev_attr_pir);
480#endif
481
482 cacheinfo_cpu_offline(cpu);
483}
484
485#ifdef CONFIG_ARCH_CPU_PROBE_RELEASE
486ssize_t arch_cpu_probe(const char *buf, size_t count)
487{
488 if (ppc_md.cpu_probe)
489 return ppc_md.cpu_probe(buf, count);
490
491 return -EINVAL;
492}
493
494ssize_t arch_cpu_release(const char *buf, size_t count)
495{
496 if (ppc_md.cpu_release)
497 return ppc_md.cpu_release(buf, count);
498
499 return -EINVAL;
500}
501#endif
502
503#endif
504
505static int sysfs_cpu_notify(struct notifier_block *self,
506 unsigned long action, void *hcpu)
507{
508 unsigned int cpu = (unsigned int)(long)hcpu;
509
510 switch (action) {
511 case CPU_ONLINE:
512 case CPU_ONLINE_FROZEN:
513 register_cpu_online(cpu);
514 break;
515#ifdef CONFIG_HOTPLUG_CPU
516 case CPU_DEAD:
517 case CPU_DEAD_FROZEN:
518 unregister_cpu_online(cpu);
519 break;
520#endif
521 }
522 return NOTIFY_OK;
523}
524
525static struct notifier_block sysfs_cpu_nb = {
526 .notifier_call = sysfs_cpu_notify,
527};
528
529static DEFINE_MUTEX(cpu_mutex);
530
531int cpu_add_dev_attr(struct device_attribute *attr)
532{
533 int cpu;
534
535 mutex_lock(&cpu_mutex);
536
537 for_each_possible_cpu(cpu) {
538 device_create_file(get_cpu_device(cpu), attr);
539 }
540
541 mutex_unlock(&cpu_mutex);
542 return 0;
543}
544EXPORT_SYMBOL_GPL(cpu_add_dev_attr);
545
546int cpu_add_dev_attr_group(struct attribute_group *attrs)
547{
548 int cpu;
549 struct device *dev;
550 int ret;
551
552 mutex_lock(&cpu_mutex);
553
554 for_each_possible_cpu(cpu) {
555 dev = get_cpu_device(cpu);
556 ret = sysfs_create_group(&dev->kobj, attrs);
557 WARN_ON(ret != 0);
558 }
559
560 mutex_unlock(&cpu_mutex);
561 return 0;
562}
563EXPORT_SYMBOL_GPL(cpu_add_dev_attr_group);
564
565
566void cpu_remove_dev_attr(struct device_attribute *attr)
567{
568 int cpu;
569
570 mutex_lock(&cpu_mutex);
571
572 for_each_possible_cpu(cpu) {
573 device_remove_file(get_cpu_device(cpu), attr);
574 }
575
576 mutex_unlock(&cpu_mutex);
577}
578EXPORT_SYMBOL_GPL(cpu_remove_dev_attr);
579
580void cpu_remove_dev_attr_group(struct attribute_group *attrs)
581{
582 int cpu;
583 struct device *dev;
584
585 mutex_lock(&cpu_mutex);
586
587 for_each_possible_cpu(cpu) {
588 dev = get_cpu_device(cpu);
589 sysfs_remove_group(&dev->kobj, attrs);
590 }
591
592 mutex_unlock(&cpu_mutex);
593}
594EXPORT_SYMBOL_GPL(cpu_remove_dev_attr_group);
595
596
597
598
599#ifdef CONFIG_NUMA
600static void register_nodes(void)
601{
602 int i;
603
604 for (i = 0; i < MAX_NUMNODES; i++)
605 register_one_node(i);
606}
607
608int sysfs_add_device_to_node(struct device *dev, int nid)
609{
610 struct node *node = node_devices[nid];
611 return sysfs_create_link(&node->dev.kobj, &dev->kobj,
612 kobject_name(&dev->kobj));
613}
614EXPORT_SYMBOL_GPL(sysfs_add_device_to_node);
615
616void sysfs_remove_device_from_node(struct device *dev, int nid)
617{
618 struct node *node = node_devices[nid];
619 sysfs_remove_link(&node->dev.kobj, kobject_name(&dev->kobj));
620}
621EXPORT_SYMBOL_GPL(sysfs_remove_device_from_node);
622
623#else
624static void register_nodes(void)
625{
626 return;
627}
628
629#endif
630
631
632static ssize_t show_physical_id(struct device *dev,
633 struct device_attribute *attr, char *buf)
634{
635 struct cpu *cpu = container_of(dev, struct cpu, dev);
636
637 return sprintf(buf, "%d\n", get_hard_smp_processor_id(cpu->dev.id));
638}
639static DEVICE_ATTR(physical_id, 0444, show_physical_id, NULL);
640
641static int __init topology_init(void)
642{
643 int cpu;
644
645 register_nodes();
646 register_cpu_notifier(&sysfs_cpu_nb);
647
648 for_each_possible_cpu(cpu) {
649 struct cpu *c = &per_cpu(cpu_devices, cpu);
650
651
652
653
654
655
656
657
658 if (ppc_md.cpu_die)
659 c->hotpluggable = 1;
660
661 if (cpu_online(cpu) || c->hotpluggable) {
662 register_cpu(c, cpu);
663
664 device_create_file(&c->dev, &dev_attr_physical_id);
665 }
666
667 if (cpu_online(cpu))
668 register_cpu_online(cpu);
669 }
670#ifdef CONFIG_PPC64
671 sysfs_create_dscr_default();
672#endif
673
674 return 0;
675}
676subsys_initcall(topology_init);
677
