1#include <linux/sysdev.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/module.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/firmware.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
22#include "cacheinfo.h"
23
24#ifdef CONFIG_PPC64
25#include <asm/paca.h>
26#include <asm/lppaca.h>
27#endif
28
29static DEFINE_PER_CPU(struct cpu, cpu_devices);
30
31
32
33
34
35#ifdef CONFIG_PPC64
36
37
38DEFINE_PER_CPU(long, smt_snooze_delay) = { 100 };
39
40static ssize_t store_smt_snooze_delay(struct sys_device *dev,
41 struct sysdev_attribute *attr,
42 const char *buf,
43 size_t count)
44{
45 struct cpu *cpu = container_of(dev, struct cpu, sysdev);
46 ssize_t ret;
47 long snooze;
48
49 ret = sscanf(buf, "%ld", &snooze);
50 if (ret != 1)
51 return -EINVAL;
52
53 per_cpu(smt_snooze_delay, cpu->sysdev.id) = snooze;
54
55 return count;
56}
57
58static ssize_t show_smt_snooze_delay(struct sys_device *dev,
59 struct sysdev_attribute *attr,
60 char *buf)
61{
62 struct cpu *cpu = container_of(dev, struct cpu, sysdev);
63
64 return sprintf(buf, "%ld\n", per_cpu(smt_snooze_delay, cpu->sysdev.id));
65}
66
67static SYSDEV_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 sys_device *dev, \
121 struct sysdev_attribute *attr, \
122 char *buf) \
123{ \
124 struct cpu *cpu = container_of(dev, struct cpu, sysdev); \
125 unsigned long val; \
126 smp_call_function_single(cpu->sysdev.id, read_##NAME, &val, 1); \
127 return sprintf(buf, "%lx\n", val); \
128} \
129static ssize_t __used \
130 store_##NAME(struct sys_device *dev, struct sysdev_attribute *attr, \
131 const char *buf, size_t count) \
132{ \
133 struct cpu *cpu = container_of(dev, struct cpu, sysdev); \
134 unsigned long val; \
135 int ret = sscanf(buf, "%lx", &val); \
136 if (ret != 1) \
137 return -EINVAL; \
138 smp_call_function_single(cpu->sysdev.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);
180
181static SYSDEV_ATTR(mmcra, 0600, show_mmcra, store_mmcra);
182static SYSDEV_ATTR(spurr, 0600, show_spurr, NULL);
183static SYSDEV_ATTR(dscr, 0600, show_dscr, store_dscr);
184static SYSDEV_ATTR(purr, 0600, show_purr, store_purr);
185#endif
186
187#ifdef HAS_PPC_PMC_PA6T
188SYSFS_PMCSETUP(pa6t_pmc0, SPRN_PA6T_PMC0);
189SYSFS_PMCSETUP(pa6t_pmc1, SPRN_PA6T_PMC1);
190SYSFS_PMCSETUP(pa6t_pmc2, SPRN_PA6T_PMC2);
191SYSFS_PMCSETUP(pa6t_pmc3, SPRN_PA6T_PMC3);
192SYSFS_PMCSETUP(pa6t_pmc4, SPRN_PA6T_PMC4);
193SYSFS_PMCSETUP(pa6t_pmc5, SPRN_PA6T_PMC5);
194#ifdef CONFIG_DEBUG_KERNEL
195SYSFS_PMCSETUP(hid0, SPRN_HID0);
196SYSFS_PMCSETUP(hid1, SPRN_HID1);
197SYSFS_PMCSETUP(hid4, SPRN_HID4);
198SYSFS_PMCSETUP(hid5, SPRN_HID5);
199SYSFS_PMCSETUP(ima0, SPRN_PA6T_IMA0);
200SYSFS_PMCSETUP(ima1, SPRN_PA6T_IMA1);
201SYSFS_PMCSETUP(ima2, SPRN_PA6T_IMA2);
202SYSFS_PMCSETUP(ima3, SPRN_PA6T_IMA3);
203SYSFS_PMCSETUP(ima4, SPRN_PA6T_IMA4);
204SYSFS_PMCSETUP(ima5, SPRN_PA6T_IMA5);
205SYSFS_PMCSETUP(ima6, SPRN_PA6T_IMA6);
206SYSFS_PMCSETUP(ima7, SPRN_PA6T_IMA7);
207SYSFS_PMCSETUP(ima8, SPRN_PA6T_IMA8);
208SYSFS_PMCSETUP(ima9, SPRN_PA6T_IMA9);
209SYSFS_PMCSETUP(imaat, SPRN_PA6T_IMAAT);
210SYSFS_PMCSETUP(btcr, SPRN_PA6T_BTCR);
211SYSFS_PMCSETUP(pccr, SPRN_PA6T_PCCR);
212SYSFS_PMCSETUP(rpccr, SPRN_PA6T_RPCCR);
213SYSFS_PMCSETUP(der, SPRN_PA6T_DER);
214SYSFS_PMCSETUP(mer, SPRN_PA6T_MER);
215SYSFS_PMCSETUP(ber, SPRN_PA6T_BER);
216SYSFS_PMCSETUP(ier, SPRN_PA6T_IER);
217SYSFS_PMCSETUP(sier, SPRN_PA6T_SIER);
218SYSFS_PMCSETUP(siar, SPRN_PA6T_SIAR);
219SYSFS_PMCSETUP(tsr0, SPRN_PA6T_TSR0);
220SYSFS_PMCSETUP(tsr1, SPRN_PA6T_TSR1);
221SYSFS_PMCSETUP(tsr2, SPRN_PA6T_TSR2);
222SYSFS_PMCSETUP(tsr3, SPRN_PA6T_TSR3);
223#endif
224#endif
225
226#ifdef HAS_PPC_PMC_IBM
227static struct sysdev_attribute ibm_common_attrs[] = {
228 _SYSDEV_ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0),
229 _SYSDEV_ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1),
230};
231#endif
232
233#ifdef HAS_PPC_PMC_G4
234static struct sysdev_attribute g4_common_attrs[] = {
235 _SYSDEV_ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0),
236 _SYSDEV_ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1),
237 _SYSDEV_ATTR(mmcr2, 0600, show_mmcr2, store_mmcr2),
238};
239#endif
240
241static struct sysdev_attribute classic_pmc_attrs[] = {
242 _SYSDEV_ATTR(pmc1, 0600, show_pmc1, store_pmc1),
243 _SYSDEV_ATTR(pmc2, 0600, show_pmc2, store_pmc2),
244 _SYSDEV_ATTR(pmc3, 0600, show_pmc3, store_pmc3),
245 _SYSDEV_ATTR(pmc4, 0600, show_pmc4, store_pmc4),
246 _SYSDEV_ATTR(pmc5, 0600, show_pmc5, store_pmc5),
247 _SYSDEV_ATTR(pmc6, 0600, show_pmc6, store_pmc6),
248#ifdef CONFIG_PPC64
249 _SYSDEV_ATTR(pmc7, 0600, show_pmc7, store_pmc7),
250 _SYSDEV_ATTR(pmc8, 0600, show_pmc8, store_pmc8),
251#endif
252};
253
254#ifdef HAS_PPC_PMC_PA6T
255static struct sysdev_attribute pa6t_attrs[] = {
256 _SYSDEV_ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0),
257 _SYSDEV_ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1),
258 _SYSDEV_ATTR(pmc0, 0600, show_pa6t_pmc0, store_pa6t_pmc0),
259 _SYSDEV_ATTR(pmc1, 0600, show_pa6t_pmc1, store_pa6t_pmc1),
260 _SYSDEV_ATTR(pmc2, 0600, show_pa6t_pmc2, store_pa6t_pmc2),
261 _SYSDEV_ATTR(pmc3, 0600, show_pa6t_pmc3, store_pa6t_pmc3),
262 _SYSDEV_ATTR(pmc4, 0600, show_pa6t_pmc4, store_pa6t_pmc4),
263 _SYSDEV_ATTR(pmc5, 0600, show_pa6t_pmc5, store_pa6t_pmc5),
264#ifdef CONFIG_DEBUG_KERNEL
265 _SYSDEV_ATTR(hid0, 0600, show_hid0, store_hid0),
266 _SYSDEV_ATTR(hid1, 0600, show_hid1, store_hid1),
267 _SYSDEV_ATTR(hid4, 0600, show_hid4, store_hid4),
268 _SYSDEV_ATTR(hid5, 0600, show_hid5, store_hid5),
269 _SYSDEV_ATTR(ima0, 0600, show_ima0, store_ima0),
270 _SYSDEV_ATTR(ima1, 0600, show_ima1, store_ima1),
271 _SYSDEV_ATTR(ima2, 0600, show_ima2, store_ima2),
272 _SYSDEV_ATTR(ima3, 0600, show_ima3, store_ima3),
273 _SYSDEV_ATTR(ima4, 0600, show_ima4, store_ima4),
274 _SYSDEV_ATTR(ima5, 0600, show_ima5, store_ima5),
275 _SYSDEV_ATTR(ima6, 0600, show_ima6, store_ima6),
276 _SYSDEV_ATTR(ima7, 0600, show_ima7, store_ima7),
277 _SYSDEV_ATTR(ima8, 0600, show_ima8, store_ima8),
278 _SYSDEV_ATTR(ima9, 0600, show_ima9, store_ima9),
279 _SYSDEV_ATTR(imaat, 0600, show_imaat, store_imaat),
280 _SYSDEV_ATTR(btcr, 0600, show_btcr, store_btcr),
281 _SYSDEV_ATTR(pccr, 0600, show_pccr, store_pccr),
282 _SYSDEV_ATTR(rpccr, 0600, show_rpccr, store_rpccr),
283 _SYSDEV_ATTR(der, 0600, show_der, store_der),
284 _SYSDEV_ATTR(mer, 0600, show_mer, store_mer),
285 _SYSDEV_ATTR(ber, 0600, show_ber, store_ber),
286 _SYSDEV_ATTR(ier, 0600, show_ier, store_ier),
287 _SYSDEV_ATTR(sier, 0600, show_sier, store_sier),
288 _SYSDEV_ATTR(siar, 0600, show_siar, store_siar),
289 _SYSDEV_ATTR(tsr0, 0600, show_tsr0, store_tsr0),
290 _SYSDEV_ATTR(tsr1, 0600, show_tsr1, store_tsr1),
291 _SYSDEV_ATTR(tsr2, 0600, show_tsr2, store_tsr2),
292 _SYSDEV_ATTR(tsr3, 0600, show_tsr3, store_tsr3),
293#endif
294};
295#endif
296#endif
297
298static void __cpuinit register_cpu_online(unsigned int cpu)
299{
300 struct cpu *c = &per_cpu(cpu_devices, cpu);
301 struct sys_device *s = &c->sysdev;
302 struct sysdev_attribute *attrs, *pmc_attrs;
303 int i, nattrs;
304
305#ifdef CONFIG_PPC64
306 if (!firmware_has_feature(FW_FEATURE_ISERIES) &&
307 cpu_has_feature(CPU_FTR_SMT))
308 sysdev_create_file(s, &attr_smt_snooze_delay);
309#endif
310
311
312 switch (cur_cpu_spec->pmc_type) {
313#ifdef HAS_PPC_PMC_IBM
314 case PPC_PMC_IBM:
315 attrs = ibm_common_attrs;
316 nattrs = sizeof(ibm_common_attrs) / sizeof(struct sysdev_attribute);
317 pmc_attrs = classic_pmc_attrs;
318 break;
319#endif
320#ifdef HAS_PPC_PMC_G4
321 case PPC_PMC_G4:
322 attrs = g4_common_attrs;
323 nattrs = sizeof(g4_common_attrs) / sizeof(struct sysdev_attribute);
324 pmc_attrs = classic_pmc_attrs;
325 break;
326#endif
327#ifdef HAS_PPC_PMC_PA6T
328 case PPC_PMC_PA6T:
329
330 attrs = pa6t_attrs;
331 nattrs = sizeof(pa6t_attrs) / sizeof(struct sysdev_attribute);
332 pmc_attrs = NULL;
333 break;
334#endif
335 default:
336 attrs = NULL;
337 nattrs = 0;
338 pmc_attrs = NULL;
339 }
340
341 for (i = 0; i < nattrs; i++)
342 sysdev_create_file(s, &attrs[i]);
343
344 if (pmc_attrs)
345 for (i = 0; i < cur_cpu_spec->num_pmcs; i++)
346 sysdev_create_file(s, &pmc_attrs[i]);
347
348#ifdef CONFIG_PPC64
349 if (cpu_has_feature(CPU_FTR_MMCRA))
350 sysdev_create_file(s, &attr_mmcra);
351
352 if (cpu_has_feature(CPU_FTR_PURR))
353 sysdev_create_file(s, &attr_purr);
354
355 if (cpu_has_feature(CPU_FTR_SPURR))
356 sysdev_create_file(s, &attr_spurr);
357
358 if (cpu_has_feature(CPU_FTR_DSCR))
359 sysdev_create_file(s, &attr_dscr);
360#endif
361
362 cacheinfo_cpu_online(cpu);
363}
364
365#ifdef CONFIG_HOTPLUG_CPU
366static void unregister_cpu_online(unsigned int cpu)
367{
368 struct cpu *c = &per_cpu(cpu_devices, cpu);
369 struct sys_device *s = &c->sysdev;
370 struct sysdev_attribute *attrs, *pmc_attrs;
371 int i, nattrs;
372
373 BUG_ON(!c->hotpluggable);
374
375#ifdef CONFIG_PPC64
376 if (!firmware_has_feature(FW_FEATURE_ISERIES) &&
377 cpu_has_feature(CPU_FTR_SMT))
378 sysdev_remove_file(s, &attr_smt_snooze_delay);
379#endif
380
381
382 switch (cur_cpu_spec->pmc_type) {
383#ifdef HAS_PPC_PMC_IBM
384 case PPC_PMC_IBM:
385 attrs = ibm_common_attrs;
386 nattrs = sizeof(ibm_common_attrs) / sizeof(struct sysdev_attribute);
387 pmc_attrs = classic_pmc_attrs;
388 break;
389#endif
390#ifdef HAS_PPC_PMC_G4
391 case PPC_PMC_G4:
392 attrs = g4_common_attrs;
393 nattrs = sizeof(g4_common_attrs) / sizeof(struct sysdev_attribute);
394 pmc_attrs = classic_pmc_attrs;
395 break;
396#endif
397#ifdef HAS_PPC_PMC_PA6T
398 case PPC_PMC_PA6T:
399
400 attrs = pa6t_attrs;
401 nattrs = sizeof(pa6t_attrs) / sizeof(struct sysdev_attribute);
402 pmc_attrs = NULL;
403 break;
404#endif
405 default:
406 attrs = NULL;
407 nattrs = 0;
408 pmc_attrs = NULL;
409 }
410
411 for (i = 0; i < nattrs; i++)
412 sysdev_remove_file(s, &attrs[i]);
413
414 if (pmc_attrs)
415 for (i = 0; i < cur_cpu_spec->num_pmcs; i++)
416 sysdev_remove_file(s, &pmc_attrs[i]);
417
418#ifdef CONFIG_PPC64
419 if (cpu_has_feature(CPU_FTR_MMCRA))
420 sysdev_remove_file(s, &attr_mmcra);
421
422 if (cpu_has_feature(CPU_FTR_PURR))
423 sysdev_remove_file(s, &attr_purr);
424
425 if (cpu_has_feature(CPU_FTR_SPURR))
426 sysdev_remove_file(s, &attr_spurr);
427
428 if (cpu_has_feature(CPU_FTR_DSCR))
429 sysdev_remove_file(s, &attr_dscr);
430#endif
431
432 cacheinfo_cpu_offline(cpu);
433}
434
435#ifdef CONFIG_ARCH_CPU_PROBE_RELEASE
436ssize_t arch_cpu_probe(const char *buf, size_t count)
437{
438 if (ppc_md.cpu_probe)
439 return ppc_md.cpu_probe(buf, count);
440
441 return -EINVAL;
442}
443
444ssize_t arch_cpu_release(const char *buf, size_t count)
445{
446 if (ppc_md.cpu_release)
447 return ppc_md.cpu_release(buf, count);
448
449 return -EINVAL;
450}
451#endif
452
453#endif
454
455static int __cpuinit sysfs_cpu_notify(struct notifier_block *self,
456 unsigned long action, void *hcpu)
457{
458 unsigned int cpu = (unsigned int)(long)hcpu;
459
460 switch (action) {
461 case CPU_ONLINE:
462 case CPU_ONLINE_FROZEN:
463 register_cpu_online(cpu);
464 break;
465#ifdef CONFIG_HOTPLUG_CPU
466 case CPU_DEAD:
467 case CPU_DEAD_FROZEN:
468 unregister_cpu_online(cpu);
469 break;
470#endif
471 }
472 return NOTIFY_OK;
473}
474
475static struct notifier_block __cpuinitdata sysfs_cpu_nb = {
476 .notifier_call = sysfs_cpu_notify,
477};
478
479static DEFINE_MUTEX(cpu_mutex);
480
481int cpu_add_sysdev_attr(struct sysdev_attribute *attr)
482{
483 int cpu;
484
485 mutex_lock(&cpu_mutex);
486
487 for_each_possible_cpu(cpu) {
488 sysdev_create_file(get_cpu_sysdev(cpu), attr);
489 }
490
491 mutex_unlock(&cpu_mutex);
492 return 0;
493}
494EXPORT_SYMBOL_GPL(cpu_add_sysdev_attr);
495
496int cpu_add_sysdev_attr_group(struct attribute_group *attrs)
497{
498 int cpu;
499 struct sys_device *sysdev;
500 int ret;
501
502 mutex_lock(&cpu_mutex);
503
504 for_each_possible_cpu(cpu) {
505 sysdev = get_cpu_sysdev(cpu);
506 ret = sysfs_create_group(&sysdev->kobj, attrs);
507 WARN_ON(ret != 0);
508 }
509
510 mutex_unlock(&cpu_mutex);
511 return 0;
512}
513EXPORT_SYMBOL_GPL(cpu_add_sysdev_attr_group);
514
515
516void cpu_remove_sysdev_attr(struct sysdev_attribute *attr)
517{
518 int cpu;
519
520 mutex_lock(&cpu_mutex);
521
522 for_each_possible_cpu(cpu) {
523 sysdev_remove_file(get_cpu_sysdev(cpu), attr);
524 }
525
526 mutex_unlock(&cpu_mutex);
527}
528EXPORT_SYMBOL_GPL(cpu_remove_sysdev_attr);
529
530void cpu_remove_sysdev_attr_group(struct attribute_group *attrs)
531{
532 int cpu;
533 struct sys_device *sysdev;
534
535 mutex_lock(&cpu_mutex);
536
537 for_each_possible_cpu(cpu) {
538 sysdev = get_cpu_sysdev(cpu);
539 sysfs_remove_group(&sysdev->kobj, attrs);
540 }
541
542 mutex_unlock(&cpu_mutex);
543}
544EXPORT_SYMBOL_GPL(cpu_remove_sysdev_attr_group);
545
546
547
548
549#ifdef CONFIG_NUMA
550static void register_nodes(void)
551{
552 int i;
553
554 for (i = 0; i < MAX_NUMNODES; i++)
555 register_one_node(i);
556}
557
558int sysfs_add_device_to_node(struct sys_device *dev, int nid)
559{
560 struct node *node = &node_devices[nid];
561 return sysfs_create_link(&node->sysdev.kobj, &dev->kobj,
562 kobject_name(&dev->kobj));
563}
564EXPORT_SYMBOL_GPL(sysfs_add_device_to_node);
565
566void sysfs_remove_device_from_node(struct sys_device *dev, int nid)
567{
568 struct node *node = &node_devices[nid];
569 sysfs_remove_link(&node->sysdev.kobj, kobject_name(&dev->kobj));
570}
571EXPORT_SYMBOL_GPL(sysfs_remove_device_from_node);
572
573#else
574static void register_nodes(void)
575{
576 return;
577}
578
579#endif
580
581
582static ssize_t show_physical_id(struct sys_device *dev,
583 struct sysdev_attribute *attr, char *buf)
584{
585 struct cpu *cpu = container_of(dev, struct cpu, sysdev);
586
587 return sprintf(buf, "%d\n", get_hard_smp_processor_id(cpu->sysdev.id));
588}
589static SYSDEV_ATTR(physical_id, 0444, show_physical_id, NULL);
590
591static int __init topology_init(void)
592{
593 int cpu;
594
595 register_nodes();
596 register_cpu_notifier(&sysfs_cpu_nb);
597
598 for_each_possible_cpu(cpu) {
599 struct cpu *c = &per_cpu(cpu_devices, cpu);
600
601
602
603
604
605
606
607
608 if (ppc_md.cpu_die)
609 c->hotpluggable = 1;
610
611 if (cpu_online(cpu) || c->hotpluggable) {
612 register_cpu(c, cpu);
613
614 sysdev_create_file(&c->sysdev, &attr_physical_id);
615 }
616
617 if (cpu_online(cpu))
618 register_cpu_online(cpu);
619 }
620
621 return 0;
622}
623subsys_initcall(topology_init);
624
