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#include <asm/firmware.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 device *dev,
41 struct device_attribute *attr,
42 const char *buf,
43 size_t count)
44{
45 struct cpu *cpu = container_of(dev, struct cpu, dev);
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->dev.id) = snooze;
54 update_smt_snooze_delay(cpu->dev.id, snooze);
55
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 struct cpu *cpu = container_of(dev, struct cpu, dev);
64
65 return sprintf(buf, "%ld\n", per_cpu(smt_snooze_delay, cpu->dev.id));
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 unsigned int cpu;
74 long snooze;
75
76 if (!cpu_has_feature(CPU_FTR_SMT))
77 return 1;
78
79 snooze = simple_strtol(str, NULL, 10);
80 for_each_possible_cpu(cpu)
81 per_cpu(smt_snooze_delay, cpu) = snooze;
82
83 return 1;
84}
85__setup("smt-snooze-delay=", setup_smt_snooze_delay);
86
87#endif
88
89
90
91
92
93
94static DEFINE_PER_CPU(char, pmcs_enabled);
95
96void ppc_enable_pmcs(void)
97{
98 ppc_set_pmu_inuse(1);
99
100
101 if (__get_cpu_var(pmcs_enabled))
102 return;
103
104 __get_cpu_var(pmcs_enabled) = 1;
105
106 if (ppc_md.enable_pmcs)
107 ppc_md.enable_pmcs();
108}
109EXPORT_SYMBOL(ppc_enable_pmcs);
110
111#define SYSFS_PMCSETUP(NAME, ADDRESS) \
112static void read_##NAME(void *val) \
113{ \
114 *(unsigned long *)val = mfspr(ADDRESS); \
115} \
116static void write_##NAME(void *val) \
117{ \
118 ppc_enable_pmcs(); \
119 mtspr(ADDRESS, *(unsigned long *)val); \
120} \
121static ssize_t show_##NAME(struct device *dev, \
122 struct device_attribute *attr, \
123 char *buf) \
124{ \
125 struct cpu *cpu = container_of(dev, struct cpu, dev); \
126 unsigned long val; \
127 smp_call_function_single(cpu->dev.id, read_##NAME, &val, 1); \
128 return sprintf(buf, "%lx\n", val); \
129} \
130static ssize_t __used \
131 store_##NAME(struct device *dev, struct device_attribute *attr, \
132 const char *buf, size_t count) \
133{ \
134 struct cpu *cpu = container_of(dev, struct cpu, dev); \
135 unsigned long val; \
136 int ret = sscanf(buf, "%lx", &val); \
137 if (ret != 1) \
138 return -EINVAL; \
139 smp_call_function_single(cpu->dev.id, write_##NAME, &val, 1); \
140 return count; \
141}
142
143
144
145
146
147
148#if defined(CONFIG_PPC64)
149#define HAS_PPC_PMC_CLASSIC 1
150#define HAS_PPC_PMC_IBM 1
151#define HAS_PPC_PMC_PA6T 1
152#elif defined(CONFIG_6xx)
153#define HAS_PPC_PMC_CLASSIC 1
154#define HAS_PPC_PMC_IBM 1
155#define HAS_PPC_PMC_G4 1
156#endif
157
158
159#ifdef HAS_PPC_PMC_CLASSIC
160SYSFS_PMCSETUP(mmcr0, SPRN_MMCR0);
161SYSFS_PMCSETUP(mmcr1, SPRN_MMCR1);
162SYSFS_PMCSETUP(pmc1, SPRN_PMC1);
163SYSFS_PMCSETUP(pmc2, SPRN_PMC2);
164SYSFS_PMCSETUP(pmc3, SPRN_PMC3);
165SYSFS_PMCSETUP(pmc4, SPRN_PMC4);
166SYSFS_PMCSETUP(pmc5, SPRN_PMC5);
167SYSFS_PMCSETUP(pmc6, SPRN_PMC6);
168
169#ifdef HAS_PPC_PMC_G4
170SYSFS_PMCSETUP(mmcr2, SPRN_MMCR2);
171#endif
172
173#ifdef CONFIG_PPC64
174SYSFS_PMCSETUP(pmc7, SPRN_PMC7);
175SYSFS_PMCSETUP(pmc8, SPRN_PMC8);
176
177SYSFS_PMCSETUP(mmcra, SPRN_MMCRA);
178SYSFS_PMCSETUP(purr, SPRN_PURR);
179SYSFS_PMCSETUP(spurr, SPRN_SPURR);
180SYSFS_PMCSETUP(dscr, SPRN_DSCR);
181SYSFS_PMCSETUP(pir, SPRN_PIR);
182
183
184
185
186
187
188static DEVICE_ATTR(mmcra, 0600, show_mmcra, store_mmcra);
189static DEVICE_ATTR(spurr, 0400, show_spurr, NULL);
190static DEVICE_ATTR(dscr, 0600, show_dscr, store_dscr);
191static DEVICE_ATTR(purr, 0400, show_purr, store_purr);
192static DEVICE_ATTR(pir, 0400, show_pir, NULL);
193
194unsigned long dscr_default = 0;
195EXPORT_SYMBOL(dscr_default);
196
197static void add_write_permission_dev_attr(struct device_attribute *attr)
198{
199 attr->attr.mode |= 0200;
200}
201
202static ssize_t show_dscr_default(struct device *dev,
203 struct device_attribute *attr, char *buf)
204{
205 return sprintf(buf, "%lx\n", dscr_default);
206}
207
208static void update_dscr(void *dummy)
209{
210 if (!current->thread.dscr_inherit) {
211 current->thread.dscr = dscr_default;
212 mtspr(SPRN_DSCR, dscr_default);
213 }
214}
215
216static ssize_t __used store_dscr_default(struct device *dev,
217 struct device_attribute *attr, const char *buf,
218 size_t count)
219{
220 unsigned long val;
221 int ret = 0;
222
223 ret = sscanf(buf, "%lx", &val);
224 if (ret != 1)
225 return -EINVAL;
226 dscr_default = val;
227
228 on_each_cpu(update_dscr, NULL, 1);
229
230 return count;
231}
232
233static DEVICE_ATTR(dscr_default, 0600,
234 show_dscr_default, store_dscr_default);
235
236static void sysfs_create_dscr_default(void)
237{
238 int err = 0;
239 if (cpu_has_feature(CPU_FTR_DSCR))
240 err = device_create_file(cpu_subsys.dev_root, &dev_attr_dscr_default);
241}
242#endif
243
244#ifdef HAS_PPC_PMC_PA6T
245SYSFS_PMCSETUP(pa6t_pmc0, SPRN_PA6T_PMC0);
246SYSFS_PMCSETUP(pa6t_pmc1, SPRN_PA6T_PMC1);
247SYSFS_PMCSETUP(pa6t_pmc2, SPRN_PA6T_PMC2);
248SYSFS_PMCSETUP(pa6t_pmc3, SPRN_PA6T_PMC3);
249SYSFS_PMCSETUP(pa6t_pmc4, SPRN_PA6T_PMC4);
250SYSFS_PMCSETUP(pa6t_pmc5, SPRN_PA6T_PMC5);
251#ifdef CONFIG_DEBUG_KERNEL
252SYSFS_PMCSETUP(hid0, SPRN_HID0);
253SYSFS_PMCSETUP(hid1, SPRN_HID1);
254SYSFS_PMCSETUP(hid4, SPRN_HID4);
255SYSFS_PMCSETUP(hid5, SPRN_HID5);
256SYSFS_PMCSETUP(ima0, SPRN_PA6T_IMA0);
257SYSFS_PMCSETUP(ima1, SPRN_PA6T_IMA1);
258SYSFS_PMCSETUP(ima2, SPRN_PA6T_IMA2);
259SYSFS_PMCSETUP(ima3, SPRN_PA6T_IMA3);
260SYSFS_PMCSETUP(ima4, SPRN_PA6T_IMA4);
261SYSFS_PMCSETUP(ima5, SPRN_PA6T_IMA5);
262SYSFS_PMCSETUP(ima6, SPRN_PA6T_IMA6);
263SYSFS_PMCSETUP(ima7, SPRN_PA6T_IMA7);
264SYSFS_PMCSETUP(ima8, SPRN_PA6T_IMA8);
265SYSFS_PMCSETUP(ima9, SPRN_PA6T_IMA9);
266SYSFS_PMCSETUP(imaat, SPRN_PA6T_IMAAT);
267SYSFS_PMCSETUP(btcr, SPRN_PA6T_BTCR);
268SYSFS_PMCSETUP(pccr, SPRN_PA6T_PCCR);
269SYSFS_PMCSETUP(rpccr, SPRN_PA6T_RPCCR);
270SYSFS_PMCSETUP(der, SPRN_PA6T_DER);
271SYSFS_PMCSETUP(mer, SPRN_PA6T_MER);
272SYSFS_PMCSETUP(ber, SPRN_PA6T_BER);
273SYSFS_PMCSETUP(ier, SPRN_PA6T_IER);
274SYSFS_PMCSETUP(sier, SPRN_PA6T_SIER);
275SYSFS_PMCSETUP(siar, SPRN_PA6T_SIAR);
276SYSFS_PMCSETUP(tsr0, SPRN_PA6T_TSR0);
277SYSFS_PMCSETUP(tsr1, SPRN_PA6T_TSR1);
278SYSFS_PMCSETUP(tsr2, SPRN_PA6T_TSR2);
279SYSFS_PMCSETUP(tsr3, SPRN_PA6T_TSR3);
280#endif
281#endif
282
283#ifdef HAS_PPC_PMC_IBM
284static struct device_attribute ibm_common_attrs[] = {
285 __ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0),
286 __ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1),
287};
288#endif
289
290#ifdef HAS_PPC_PMC_G4
291static struct device_attribute g4_common_attrs[] = {
292 __ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0),
293 __ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1),
294 __ATTR(mmcr2, 0600, show_mmcr2, store_mmcr2),
295};
296#endif
297
298static struct device_attribute classic_pmc_attrs[] = {
299 __ATTR(pmc1, 0600, show_pmc1, store_pmc1),
300 __ATTR(pmc2, 0600, show_pmc2, store_pmc2),
301 __ATTR(pmc3, 0600, show_pmc3, store_pmc3),
302 __ATTR(pmc4, 0600, show_pmc4, store_pmc4),
303 __ATTR(pmc5, 0600, show_pmc5, store_pmc5),
304 __ATTR(pmc6, 0600, show_pmc6, store_pmc6),
305#ifdef CONFIG_PPC64
306 __ATTR(pmc7, 0600, show_pmc7, store_pmc7),
307 __ATTR(pmc8, 0600, show_pmc8, store_pmc8),
308#endif
309};
310
311#ifdef HAS_PPC_PMC_PA6T
312static struct device_attribute pa6t_attrs[] = {
313 __ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0),
314 __ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1),
315 __ATTR(pmc0, 0600, show_pa6t_pmc0, store_pa6t_pmc0),
316 __ATTR(pmc1, 0600, show_pa6t_pmc1, store_pa6t_pmc1),
317 __ATTR(pmc2, 0600, show_pa6t_pmc2, store_pa6t_pmc2),
318 __ATTR(pmc3, 0600, show_pa6t_pmc3, store_pa6t_pmc3),
319 __ATTR(pmc4, 0600, show_pa6t_pmc4, store_pa6t_pmc4),
320 __ATTR(pmc5, 0600, show_pa6t_pmc5, store_pa6t_pmc5),
321#ifdef CONFIG_DEBUG_KERNEL
322 __ATTR(hid0, 0600, show_hid0, store_hid0),
323 __ATTR(hid1, 0600, show_hid1, store_hid1),
324 __ATTR(hid4, 0600, show_hid4, store_hid4),
325 __ATTR(hid5, 0600, show_hid5, store_hid5),
326 __ATTR(ima0, 0600, show_ima0, store_ima0),
327 __ATTR(ima1, 0600, show_ima1, store_ima1),
328 __ATTR(ima2, 0600, show_ima2, store_ima2),
329 __ATTR(ima3, 0600, show_ima3, store_ima3),
330 __ATTR(ima4, 0600, show_ima4, store_ima4),
331 __ATTR(ima5, 0600, show_ima5, store_ima5),
332 __ATTR(ima6, 0600, show_ima6, store_ima6),
333 __ATTR(ima7, 0600, show_ima7, store_ima7),
334 __ATTR(ima8, 0600, show_ima8, store_ima8),
335 __ATTR(ima9, 0600, show_ima9, store_ima9),
336 __ATTR(imaat, 0600, show_imaat, store_imaat),
337 __ATTR(btcr, 0600, show_btcr, store_btcr),
338 __ATTR(pccr, 0600, show_pccr, store_pccr),
339 __ATTR(rpccr, 0600, show_rpccr, store_rpccr),
340 __ATTR(der, 0600, show_der, store_der),
341 __ATTR(mer, 0600, show_mer, store_mer),
342 __ATTR(ber, 0600, show_ber, store_ber),
343 __ATTR(ier, 0600, show_ier, store_ier),
344 __ATTR(sier, 0600, show_sier, store_sier),
345 __ATTR(siar, 0600, show_siar, store_siar),
346 __ATTR(tsr0, 0600, show_tsr0, store_tsr0),
347 __ATTR(tsr1, 0600, show_tsr1, store_tsr1),
348 __ATTR(tsr2, 0600, show_tsr2, store_tsr2),
349 __ATTR(tsr3, 0600, show_tsr3, store_tsr3),
350#endif
351};
352#endif
353#endif
354
355static void register_cpu_online(unsigned int cpu)
356{
357 struct cpu *c = &per_cpu(cpu_devices, cpu);
358 struct device *s = &c->dev;
359 struct device_attribute *attrs, *pmc_attrs;
360 int i, nattrs;
361
362#ifdef CONFIG_PPC64
363 if (cpu_has_feature(CPU_FTR_SMT))
364 device_create_file(s, &dev_attr_smt_snooze_delay);
365#endif
366
367
368 switch (cur_cpu_spec->pmc_type) {
369#ifdef HAS_PPC_PMC_IBM
370 case PPC_PMC_IBM:
371 attrs = ibm_common_attrs;
372 nattrs = sizeof(ibm_common_attrs) / sizeof(struct device_attribute);
373 pmc_attrs = classic_pmc_attrs;
374 break;
375#endif
376#ifdef HAS_PPC_PMC_G4
377 case PPC_PMC_G4:
378 attrs = g4_common_attrs;
379 nattrs = sizeof(g4_common_attrs) / sizeof(struct device_attribute);
380 pmc_attrs = classic_pmc_attrs;
381 break;
382#endif
383#ifdef HAS_PPC_PMC_PA6T
384 case PPC_PMC_PA6T:
385
386 attrs = pa6t_attrs;
387 nattrs = sizeof(pa6t_attrs) / sizeof(struct device_attribute);
388 pmc_attrs = NULL;
389 break;
390#endif
391 default:
392 attrs = NULL;
393 nattrs = 0;
394 pmc_attrs = NULL;
395 }
396
397 for (i = 0; i < nattrs; i++)
398 device_create_file(s, &attrs[i]);
399
400 if (pmc_attrs)
401 for (i = 0; i < cur_cpu_spec->num_pmcs; i++)
402 device_create_file(s, &pmc_attrs[i]);
403
404#ifdef CONFIG_PPC64
405 if (cpu_has_feature(CPU_FTR_MMCRA))
406 device_create_file(s, &dev_attr_mmcra);
407
408 if (cpu_has_feature(CPU_FTR_PURR)) {
409 if (!firmware_has_feature(FW_FEATURE_LPAR))
410 add_write_permission_dev_attr(&dev_attr_purr);
411 device_create_file(s, &dev_attr_purr);
412 }
413
414 if (cpu_has_feature(CPU_FTR_SPURR))
415 device_create_file(s, &dev_attr_spurr);
416
417 if (cpu_has_feature(CPU_FTR_DSCR))
418 device_create_file(s, &dev_attr_dscr);
419
420 if (cpu_has_feature(CPU_FTR_PPCAS_ARCH_V2))
421 device_create_file(s, &dev_attr_pir);
422#endif
423
424 cacheinfo_cpu_online(cpu);
425}
426
427#ifdef CONFIG_HOTPLUG_CPU
428static void unregister_cpu_online(unsigned int cpu)
429{
430 struct cpu *c = &per_cpu(cpu_devices, cpu);
431 struct device *s = &c->dev;
432 struct device_attribute *attrs, *pmc_attrs;
433 int i, nattrs;
434
435 BUG_ON(!c->hotpluggable);
436
437#ifdef CONFIG_PPC64
438 if (cpu_has_feature(CPU_FTR_SMT))
439 device_remove_file(s, &dev_attr_smt_snooze_delay);
440#endif
441
442
443 switch (cur_cpu_spec->pmc_type) {
444#ifdef HAS_PPC_PMC_IBM
445 case PPC_PMC_IBM:
446 attrs = ibm_common_attrs;
447 nattrs = sizeof(ibm_common_attrs) / sizeof(struct device_attribute);
448 pmc_attrs = classic_pmc_attrs;
449 break;
450#endif
451#ifdef HAS_PPC_PMC_G4
452 case PPC_PMC_G4:
453 attrs = g4_common_attrs;
454 nattrs = sizeof(g4_common_attrs) / sizeof(struct device_attribute);
455 pmc_attrs = classic_pmc_attrs;
456 break;
457#endif
458#ifdef HAS_PPC_PMC_PA6T
459 case PPC_PMC_PA6T:
460
461 attrs = pa6t_attrs;
462 nattrs = sizeof(pa6t_attrs) / sizeof(struct device_attribute);
463 pmc_attrs = NULL;
464 break;
465#endif
466 default:
467 attrs = NULL;
468 nattrs = 0;
469 pmc_attrs = NULL;
470 }
471
472 for (i = 0; i < nattrs; i++)
473 device_remove_file(s, &attrs[i]);
474
475 if (pmc_attrs)
476 for (i = 0; i < cur_cpu_spec->num_pmcs; i++)
477 device_remove_file(s, &pmc_attrs[i]);
478
479#ifdef CONFIG_PPC64
480 if (cpu_has_feature(CPU_FTR_MMCRA))
481 device_remove_file(s, &dev_attr_mmcra);
482
483 if (cpu_has_feature(CPU_FTR_PURR))
484 device_remove_file(s, &dev_attr_purr);
485
486 if (cpu_has_feature(CPU_FTR_SPURR))
487 device_remove_file(s, &dev_attr_spurr);
488
489 if (cpu_has_feature(CPU_FTR_DSCR))
490 device_remove_file(s, &dev_attr_dscr);
491
492 if (cpu_has_feature(CPU_FTR_PPCAS_ARCH_V2))
493 device_remove_file(s, &dev_attr_pir);
494#endif
495
496 cacheinfo_cpu_offline(cpu);
497}
498
499#ifdef CONFIG_ARCH_CPU_PROBE_RELEASE
500ssize_t arch_cpu_probe(const char *buf, size_t count)
501{
502 if (ppc_md.cpu_probe)
503 return ppc_md.cpu_probe(buf, count);
504
505 return -EINVAL;
506}
507
508ssize_t arch_cpu_release(const char *buf, size_t count)
509{
510 if (ppc_md.cpu_release)
511 return ppc_md.cpu_release(buf, count);
512
513 return -EINVAL;
514}
515#endif
516
517#endif
518
519static int sysfs_cpu_notify(struct notifier_block *self,
520 unsigned long action, void *hcpu)
521{
522 unsigned int cpu = (unsigned int)(long)hcpu;
523
524 switch (action) {
525 case CPU_ONLINE:
526 case CPU_ONLINE_FROZEN:
527 register_cpu_online(cpu);
528 break;
529#ifdef CONFIG_HOTPLUG_CPU
530 case CPU_DEAD:
531 case CPU_DEAD_FROZEN:
532 unregister_cpu_online(cpu);
533 break;
534#endif
535 }
536 return NOTIFY_OK;
537}
538
539static struct notifier_block sysfs_cpu_nb = {
540 .notifier_call = sysfs_cpu_notify,
541};
542
543static DEFINE_MUTEX(cpu_mutex);
544
545int cpu_add_dev_attr(struct device_attribute *attr)
546{
547 int cpu;
548
549 mutex_lock(&cpu_mutex);
550
551 for_each_possible_cpu(cpu) {
552 device_create_file(get_cpu_device(cpu), attr);
553 }
554
555 mutex_unlock(&cpu_mutex);
556 return 0;
557}
558EXPORT_SYMBOL_GPL(cpu_add_dev_attr);
559
560int cpu_add_dev_attr_group(struct attribute_group *attrs)
561{
562 int cpu;
563 struct device *dev;
564 int ret;
565
566 mutex_lock(&cpu_mutex);
567
568 for_each_possible_cpu(cpu) {
569 dev = get_cpu_device(cpu);
570 ret = sysfs_create_group(&dev->kobj, attrs);
571 WARN_ON(ret != 0);
572 }
573
574 mutex_unlock(&cpu_mutex);
575 return 0;
576}
577EXPORT_SYMBOL_GPL(cpu_add_dev_attr_group);
578
579
580void cpu_remove_dev_attr(struct device_attribute *attr)
581{
582 int cpu;
583
584 mutex_lock(&cpu_mutex);
585
586 for_each_possible_cpu(cpu) {
587 device_remove_file(get_cpu_device(cpu), attr);
588 }
589
590 mutex_unlock(&cpu_mutex);
591}
592EXPORT_SYMBOL_GPL(cpu_remove_dev_attr);
593
594void cpu_remove_dev_attr_group(struct attribute_group *attrs)
595{
596 int cpu;
597 struct device *dev;
598
599 mutex_lock(&cpu_mutex);
600
601 for_each_possible_cpu(cpu) {
602 dev = get_cpu_device(cpu);
603 sysfs_remove_group(&dev->kobj, attrs);
604 }
605
606 mutex_unlock(&cpu_mutex);
607}
608EXPORT_SYMBOL_GPL(cpu_remove_dev_attr_group);
609
610
611
612
613#ifdef CONFIG_NUMA
614static void register_nodes(void)
615{
616 int i;
617
618 for (i = 0; i < MAX_NUMNODES; i++)
619 register_one_node(i);
620}
621
622int sysfs_add_device_to_node(struct device *dev, int nid)
623{
624 struct node *node = node_devices[nid];
625 return sysfs_create_link(&node->dev.kobj, &dev->kobj,
626 kobject_name(&dev->kobj));
627}
628EXPORT_SYMBOL_GPL(sysfs_add_device_to_node);
629
630void sysfs_remove_device_from_node(struct device *dev, int nid)
631{
632 struct node *node = node_devices[nid];
633 sysfs_remove_link(&node->dev.kobj, kobject_name(&dev->kobj));
634}
635EXPORT_SYMBOL_GPL(sysfs_remove_device_from_node);
636
637#else
638static void register_nodes(void)
639{
640 return;
641}
642
643#endif
644
645
646static ssize_t show_physical_id(struct device *dev,
647 struct device_attribute *attr, char *buf)
648{
649 struct cpu *cpu = container_of(dev, struct cpu, dev);
650
651 return sprintf(buf, "%d\n", get_hard_smp_processor_id(cpu->dev.id));
652}
653static DEVICE_ATTR(physical_id, 0444, show_physical_id, NULL);
654
655static int __init topology_init(void)
656{
657 int cpu;
658
659 register_nodes();
660 register_cpu_notifier(&sysfs_cpu_nb);
661
662 for_each_possible_cpu(cpu) {
663 struct cpu *c = &per_cpu(cpu_devices, cpu);
664
665
666
667
668
669
670
671
672 if (ppc_md.cpu_die)
673 c->hotpluggable = 1;
674
675 if (cpu_online(cpu) || c->hotpluggable) {
676 register_cpu(c, cpu);
677
678 device_create_file(&c->dev, &dev_attr_physical_id);
679 }
680
681 if (cpu_online(cpu))
682 register_cpu_online(cpu);
683 }
684#ifdef CONFIG_PPC64
685 sysfs_create_dscr_default();
686#endif
687
688 return 0;
689}
690subsys_initcall(topology_init);
691
