1 #include <linux/sysdev.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>
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>
18 #include <asm/machdep.h>
21 #include <asm/system.h>
23 #include "cacheinfo.h"
27 #include <asm/lppaca.h>
30 static DEFINE_PER_CPU(struct cpu
, cpu_devices
);
33 * SMT snooze delay stuff, 64-bit only for now
38 /* Time in microseconds we delay before sleeping in the idle loop */
39 DEFINE_PER_CPU(long, smt_snooze_delay
) = { 100 };
41 static ssize_t
store_smt_snooze_delay(struct sys_device
*dev
,
42 struct sysdev_attribute
*attr
,
46 struct cpu
*cpu
= container_of(dev
, struct cpu
, sysdev
);
50 ret
= sscanf(buf
, "%ld", &snooze
);
54 per_cpu(smt_snooze_delay
, cpu
->sysdev
.id
) = snooze
;
55 update_smt_snooze_delay(snooze
);
60 static ssize_t
show_smt_snooze_delay(struct sys_device
*dev
,
61 struct sysdev_attribute
*attr
,
64 struct cpu
*cpu
= container_of(dev
, struct cpu
, sysdev
);
66 return sprintf(buf
, "%ld\n", per_cpu(smt_snooze_delay
, cpu
->sysdev
.id
));
69 static SYSDEV_ATTR(smt_snooze_delay
, 0644, show_smt_snooze_delay
,
70 store_smt_snooze_delay
);
72 static int __init
setup_smt_snooze_delay(char *str
)
77 if (!cpu_has_feature(CPU_FTR_SMT
))
80 snooze
= simple_strtol(str
, NULL
, 10);
81 for_each_possible_cpu(cpu
)
82 per_cpu(smt_snooze_delay
, cpu
) = snooze
;
86 __setup("smt-snooze-delay=", setup_smt_snooze_delay
);
88 #endif /* CONFIG_PPC64 */
91 * Enabling PMCs will slow partition context switch times so we only do
92 * it the first time we write to the PMCs.
95 static DEFINE_PER_CPU(char, pmcs_enabled
);
97 void ppc_enable_pmcs(void)
101 /* Only need to enable them once */
102 if (__get_cpu_var(pmcs_enabled
))
105 __get_cpu_var(pmcs_enabled
) = 1;
107 if (ppc_md
.enable_pmcs
)
108 ppc_md
.enable_pmcs();
110 EXPORT_SYMBOL(ppc_enable_pmcs
);
112 #define SYSFS_PMCSETUP(NAME, ADDRESS) \
113 static void read_##NAME(void *val) \
115 *(unsigned long *)val = mfspr(ADDRESS); \
117 static void write_##NAME(void *val) \
120 mtspr(ADDRESS, *(unsigned long *)val); \
122 static ssize_t show_##NAME(struct sys_device *dev, \
123 struct sysdev_attribute *attr, \
126 struct cpu *cpu = container_of(dev, struct cpu, sysdev); \
128 smp_call_function_single(cpu->sysdev.id, read_##NAME, &val, 1); \
129 return sprintf(buf, "%lx\n", val); \
131 static ssize_t __used \
132 store_##NAME(struct sys_device *dev, struct sysdev_attribute *attr, \
133 const char *buf, size_t count) \
135 struct cpu *cpu = container_of(dev, struct cpu, sysdev); \
137 int ret = sscanf(buf, "%lx", &val); \
140 smp_call_function_single(cpu->sysdev.id, write_##NAME, &val, 1); \
145 /* Let's define all possible registers, we'll only hook up the ones
146 * that are implemented on the current processor
149 #if defined(CONFIG_PPC64)
150 #define HAS_PPC_PMC_CLASSIC 1
151 #define HAS_PPC_PMC_IBM 1
152 #define HAS_PPC_PMC_PA6T 1
153 #elif defined(CONFIG_6xx)
154 #define HAS_PPC_PMC_CLASSIC 1
155 #define HAS_PPC_PMC_IBM 1
156 #define HAS_PPC_PMC_G4 1
160 #ifdef HAS_PPC_PMC_CLASSIC
161 SYSFS_PMCSETUP(mmcr0
, SPRN_MMCR0
);
162 SYSFS_PMCSETUP(mmcr1
, SPRN_MMCR1
);
163 SYSFS_PMCSETUP(pmc1
, SPRN_PMC1
);
164 SYSFS_PMCSETUP(pmc2
, SPRN_PMC2
);
165 SYSFS_PMCSETUP(pmc3
, SPRN_PMC3
);
166 SYSFS_PMCSETUP(pmc4
, SPRN_PMC4
);
167 SYSFS_PMCSETUP(pmc5
, SPRN_PMC5
);
168 SYSFS_PMCSETUP(pmc6
, SPRN_PMC6
);
170 #ifdef HAS_PPC_PMC_G4
171 SYSFS_PMCSETUP(mmcr2
, SPRN_MMCR2
);
175 SYSFS_PMCSETUP(pmc7
, SPRN_PMC7
);
176 SYSFS_PMCSETUP(pmc8
, SPRN_PMC8
);
178 SYSFS_PMCSETUP(mmcra
, SPRN_MMCRA
);
179 SYSFS_PMCSETUP(purr
, SPRN_PURR
);
180 SYSFS_PMCSETUP(spurr
, SPRN_SPURR
);
181 SYSFS_PMCSETUP(dscr
, SPRN_DSCR
);
182 SYSFS_PMCSETUP(pir
, SPRN_PIR
);
184 static SYSDEV_ATTR(mmcra
, 0600, show_mmcra
, store_mmcra
);
185 static SYSDEV_ATTR(spurr
, 0600, show_spurr
, NULL
);
186 static SYSDEV_ATTR(dscr
, 0600, show_dscr
, store_dscr
);
187 static SYSDEV_ATTR(purr
, 0600, show_purr
, store_purr
);
188 static SYSDEV_ATTR(pir
, 0400, show_pir
, NULL
);
190 unsigned long dscr_default
= 0;
191 EXPORT_SYMBOL(dscr_default
);
193 static ssize_t
show_dscr_default(struct sysdev_class
*class,
194 struct sysdev_class_attribute
*attr
, char *buf
)
196 return sprintf(buf
, "%lx\n", dscr_default
);
199 static ssize_t __used
store_dscr_default(struct sysdev_class
*class,
200 struct sysdev_class_attribute
*attr
, const char *buf
,
206 ret
= sscanf(buf
, "%lx", &val
);
214 static SYSDEV_CLASS_ATTR(dscr_default
, 0600,
215 show_dscr_default
, store_dscr_default
);
217 static void sysfs_create_dscr_default(void)
220 if (cpu_has_feature(CPU_FTR_DSCR
))
221 err
= sysfs_create_file(&cpu_sysdev_class
.kset
.kobj
,
222 &attr_dscr_default
.attr
);
224 #endif /* CONFIG_PPC64 */
226 #ifdef HAS_PPC_PMC_PA6T
227 SYSFS_PMCSETUP(pa6t_pmc0
, SPRN_PA6T_PMC0
);
228 SYSFS_PMCSETUP(pa6t_pmc1
, SPRN_PA6T_PMC1
);
229 SYSFS_PMCSETUP(pa6t_pmc2
, SPRN_PA6T_PMC2
);
230 SYSFS_PMCSETUP(pa6t_pmc3
, SPRN_PA6T_PMC3
);
231 SYSFS_PMCSETUP(pa6t_pmc4
, SPRN_PA6T_PMC4
);
232 SYSFS_PMCSETUP(pa6t_pmc5
, SPRN_PA6T_PMC5
);
233 #ifdef CONFIG_DEBUG_KERNEL
234 SYSFS_PMCSETUP(hid0
, SPRN_HID0
);
235 SYSFS_PMCSETUP(hid1
, SPRN_HID1
);
236 SYSFS_PMCSETUP(hid4
, SPRN_HID4
);
237 SYSFS_PMCSETUP(hid5
, SPRN_HID5
);
238 SYSFS_PMCSETUP(ima0
, SPRN_PA6T_IMA0
);
239 SYSFS_PMCSETUP(ima1
, SPRN_PA6T_IMA1
);
240 SYSFS_PMCSETUP(ima2
, SPRN_PA6T_IMA2
);
241 SYSFS_PMCSETUP(ima3
, SPRN_PA6T_IMA3
);
242 SYSFS_PMCSETUP(ima4
, SPRN_PA6T_IMA4
);
243 SYSFS_PMCSETUP(ima5
, SPRN_PA6T_IMA5
);
244 SYSFS_PMCSETUP(ima6
, SPRN_PA6T_IMA6
);
245 SYSFS_PMCSETUP(ima7
, SPRN_PA6T_IMA7
);
246 SYSFS_PMCSETUP(ima8
, SPRN_PA6T_IMA8
);
247 SYSFS_PMCSETUP(ima9
, SPRN_PA6T_IMA9
);
248 SYSFS_PMCSETUP(imaat
, SPRN_PA6T_IMAAT
);
249 SYSFS_PMCSETUP(btcr
, SPRN_PA6T_BTCR
);
250 SYSFS_PMCSETUP(pccr
, SPRN_PA6T_PCCR
);
251 SYSFS_PMCSETUP(rpccr
, SPRN_PA6T_RPCCR
);
252 SYSFS_PMCSETUP(der
, SPRN_PA6T_DER
);
253 SYSFS_PMCSETUP(mer
, SPRN_PA6T_MER
);
254 SYSFS_PMCSETUP(ber
, SPRN_PA6T_BER
);
255 SYSFS_PMCSETUP(ier
, SPRN_PA6T_IER
);
256 SYSFS_PMCSETUP(sier
, SPRN_PA6T_SIER
);
257 SYSFS_PMCSETUP(siar
, SPRN_PA6T_SIAR
);
258 SYSFS_PMCSETUP(tsr0
, SPRN_PA6T_TSR0
);
259 SYSFS_PMCSETUP(tsr1
, SPRN_PA6T_TSR1
);
260 SYSFS_PMCSETUP(tsr2
, SPRN_PA6T_TSR2
);
261 SYSFS_PMCSETUP(tsr3
, SPRN_PA6T_TSR3
);
262 #endif /* CONFIG_DEBUG_KERNEL */
263 #endif /* HAS_PPC_PMC_PA6T */
265 #ifdef HAS_PPC_PMC_IBM
266 static struct sysdev_attribute ibm_common_attrs
[] = {
267 _SYSDEV_ATTR(mmcr0
, 0600, show_mmcr0
, store_mmcr0
),
268 _SYSDEV_ATTR(mmcr1
, 0600, show_mmcr1
, store_mmcr1
),
270 #endif /* HAS_PPC_PMC_G4 */
272 #ifdef HAS_PPC_PMC_G4
273 static struct sysdev_attribute g4_common_attrs
[] = {
274 _SYSDEV_ATTR(mmcr0
, 0600, show_mmcr0
, store_mmcr0
),
275 _SYSDEV_ATTR(mmcr1
, 0600, show_mmcr1
, store_mmcr1
),
276 _SYSDEV_ATTR(mmcr2
, 0600, show_mmcr2
, store_mmcr2
),
278 #endif /* HAS_PPC_PMC_G4 */
280 static struct sysdev_attribute classic_pmc_attrs
[] = {
281 _SYSDEV_ATTR(pmc1
, 0600, show_pmc1
, store_pmc1
),
282 _SYSDEV_ATTR(pmc2
, 0600, show_pmc2
, store_pmc2
),
283 _SYSDEV_ATTR(pmc3
, 0600, show_pmc3
, store_pmc3
),
284 _SYSDEV_ATTR(pmc4
, 0600, show_pmc4
, store_pmc4
),
285 _SYSDEV_ATTR(pmc5
, 0600, show_pmc5
, store_pmc5
),
286 _SYSDEV_ATTR(pmc6
, 0600, show_pmc6
, store_pmc6
),
288 _SYSDEV_ATTR(pmc7
, 0600, show_pmc7
, store_pmc7
),
289 _SYSDEV_ATTR(pmc8
, 0600, show_pmc8
, store_pmc8
),
293 #ifdef HAS_PPC_PMC_PA6T
294 static struct sysdev_attribute pa6t_attrs
[] = {
295 _SYSDEV_ATTR(mmcr0
, 0600, show_mmcr0
, store_mmcr0
),
296 _SYSDEV_ATTR(mmcr1
, 0600, show_mmcr1
, store_mmcr1
),
297 _SYSDEV_ATTR(pmc0
, 0600, show_pa6t_pmc0
, store_pa6t_pmc0
),
298 _SYSDEV_ATTR(pmc1
, 0600, show_pa6t_pmc1
, store_pa6t_pmc1
),
299 _SYSDEV_ATTR(pmc2
, 0600, show_pa6t_pmc2
, store_pa6t_pmc2
),
300 _SYSDEV_ATTR(pmc3
, 0600, show_pa6t_pmc3
, store_pa6t_pmc3
),
301 _SYSDEV_ATTR(pmc4
, 0600, show_pa6t_pmc4
, store_pa6t_pmc4
),
302 _SYSDEV_ATTR(pmc5
, 0600, show_pa6t_pmc5
, store_pa6t_pmc5
),
303 #ifdef CONFIG_DEBUG_KERNEL
304 _SYSDEV_ATTR(hid0
, 0600, show_hid0
, store_hid0
),
305 _SYSDEV_ATTR(hid1
, 0600, show_hid1
, store_hid1
),
306 _SYSDEV_ATTR(hid4
, 0600, show_hid4
, store_hid4
),
307 _SYSDEV_ATTR(hid5
, 0600, show_hid5
, store_hid5
),
308 _SYSDEV_ATTR(ima0
, 0600, show_ima0
, store_ima0
),
309 _SYSDEV_ATTR(ima1
, 0600, show_ima1
, store_ima1
),
310 _SYSDEV_ATTR(ima2
, 0600, show_ima2
, store_ima2
),
311 _SYSDEV_ATTR(ima3
, 0600, show_ima3
, store_ima3
),
312 _SYSDEV_ATTR(ima4
, 0600, show_ima4
, store_ima4
),
313 _SYSDEV_ATTR(ima5
, 0600, show_ima5
, store_ima5
),
314 _SYSDEV_ATTR(ima6
, 0600, show_ima6
, store_ima6
),
315 _SYSDEV_ATTR(ima7
, 0600, show_ima7
, store_ima7
),
316 _SYSDEV_ATTR(ima8
, 0600, show_ima8
, store_ima8
),
317 _SYSDEV_ATTR(ima9
, 0600, show_ima9
, store_ima9
),
318 _SYSDEV_ATTR(imaat
, 0600, show_imaat
, store_imaat
),
319 _SYSDEV_ATTR(btcr
, 0600, show_btcr
, store_btcr
),
320 _SYSDEV_ATTR(pccr
, 0600, show_pccr
, store_pccr
),
321 _SYSDEV_ATTR(rpccr
, 0600, show_rpccr
, store_rpccr
),
322 _SYSDEV_ATTR(der
, 0600, show_der
, store_der
),
323 _SYSDEV_ATTR(mer
, 0600, show_mer
, store_mer
),
324 _SYSDEV_ATTR(ber
, 0600, show_ber
, store_ber
),
325 _SYSDEV_ATTR(ier
, 0600, show_ier
, store_ier
),
326 _SYSDEV_ATTR(sier
, 0600, show_sier
, store_sier
),
327 _SYSDEV_ATTR(siar
, 0600, show_siar
, store_siar
),
328 _SYSDEV_ATTR(tsr0
, 0600, show_tsr0
, store_tsr0
),
329 _SYSDEV_ATTR(tsr1
, 0600, show_tsr1
, store_tsr1
),
330 _SYSDEV_ATTR(tsr2
, 0600, show_tsr2
, store_tsr2
),
331 _SYSDEV_ATTR(tsr3
, 0600, show_tsr3
, store_tsr3
),
332 #endif /* CONFIG_DEBUG_KERNEL */
334 #endif /* HAS_PPC_PMC_PA6T */
335 #endif /* HAS_PPC_PMC_CLASSIC */
337 static void __cpuinit
register_cpu_online(unsigned int cpu
)
339 struct cpu
*c
= &per_cpu(cpu_devices
, cpu
);
340 struct sys_device
*s
= &c
->sysdev
;
341 struct sysdev_attribute
*attrs
, *pmc_attrs
;
345 if (!firmware_has_feature(FW_FEATURE_ISERIES
) &&
346 cpu_has_feature(CPU_FTR_SMT
))
347 sysdev_create_file(s
, &attr_smt_snooze_delay
);
351 switch (cur_cpu_spec
->pmc_type
) {
352 #ifdef HAS_PPC_PMC_IBM
354 attrs
= ibm_common_attrs
;
355 nattrs
= sizeof(ibm_common_attrs
) / sizeof(struct sysdev_attribute
);
356 pmc_attrs
= classic_pmc_attrs
;
358 #endif /* HAS_PPC_PMC_IBM */
359 #ifdef HAS_PPC_PMC_G4
361 attrs
= g4_common_attrs
;
362 nattrs
= sizeof(g4_common_attrs
) / sizeof(struct sysdev_attribute
);
363 pmc_attrs
= classic_pmc_attrs
;
365 #endif /* HAS_PPC_PMC_G4 */
366 #ifdef HAS_PPC_PMC_PA6T
368 /* PA Semi starts counting at PMC0 */
370 nattrs
= sizeof(pa6t_attrs
) / sizeof(struct sysdev_attribute
);
373 #endif /* HAS_PPC_PMC_PA6T */
380 for (i
= 0; i
< nattrs
; i
++)
381 sysdev_create_file(s
, &attrs
[i
]);
384 for (i
= 0; i
< cur_cpu_spec
->num_pmcs
; i
++)
385 sysdev_create_file(s
, &pmc_attrs
[i
]);
388 if (cpu_has_feature(CPU_FTR_MMCRA
))
389 sysdev_create_file(s
, &attr_mmcra
);
391 if (cpu_has_feature(CPU_FTR_PURR
))
392 sysdev_create_file(s
, &attr_purr
);
394 if (cpu_has_feature(CPU_FTR_SPURR
))
395 sysdev_create_file(s
, &attr_spurr
);
397 if (cpu_has_feature(CPU_FTR_DSCR
))
398 sysdev_create_file(s
, &attr_dscr
);
400 if (cpu_has_feature(CPU_FTR_PPCAS_ARCH_V2
))
401 sysdev_create_file(s
, &attr_pir
);
402 #endif /* CONFIG_PPC64 */
404 cacheinfo_cpu_online(cpu
);
407 #ifdef CONFIG_HOTPLUG_CPU
408 static void unregister_cpu_online(unsigned int cpu
)
410 struct cpu
*c
= &per_cpu(cpu_devices
, cpu
);
411 struct sys_device
*s
= &c
->sysdev
;
412 struct sysdev_attribute
*attrs
, *pmc_attrs
;
415 BUG_ON(!c
->hotpluggable
);
418 if (!firmware_has_feature(FW_FEATURE_ISERIES
) &&
419 cpu_has_feature(CPU_FTR_SMT
))
420 sysdev_remove_file(s
, &attr_smt_snooze_delay
);
424 switch (cur_cpu_spec
->pmc_type
) {
425 #ifdef HAS_PPC_PMC_IBM
427 attrs
= ibm_common_attrs
;
428 nattrs
= sizeof(ibm_common_attrs
) / sizeof(struct sysdev_attribute
);
429 pmc_attrs
= classic_pmc_attrs
;
431 #endif /* HAS_PPC_PMC_IBM */
432 #ifdef HAS_PPC_PMC_G4
434 attrs
= g4_common_attrs
;
435 nattrs
= sizeof(g4_common_attrs
) / sizeof(struct sysdev_attribute
);
436 pmc_attrs
= classic_pmc_attrs
;
438 #endif /* HAS_PPC_PMC_G4 */
439 #ifdef HAS_PPC_PMC_PA6T
441 /* PA Semi starts counting at PMC0 */
443 nattrs
= sizeof(pa6t_attrs
) / sizeof(struct sysdev_attribute
);
446 #endif /* HAS_PPC_PMC_PA6T */
453 for (i
= 0; i
< nattrs
; i
++)
454 sysdev_remove_file(s
, &attrs
[i
]);
457 for (i
= 0; i
< cur_cpu_spec
->num_pmcs
; i
++)
458 sysdev_remove_file(s
, &pmc_attrs
[i
]);
461 if (cpu_has_feature(CPU_FTR_MMCRA
))
462 sysdev_remove_file(s
, &attr_mmcra
);
464 if (cpu_has_feature(CPU_FTR_PURR
))
465 sysdev_remove_file(s
, &attr_purr
);
467 if (cpu_has_feature(CPU_FTR_SPURR
))
468 sysdev_remove_file(s
, &attr_spurr
);
470 if (cpu_has_feature(CPU_FTR_DSCR
))
471 sysdev_remove_file(s
, &attr_dscr
);
473 if (cpu_has_feature(CPU_FTR_PPCAS_ARCH_V2
))
474 sysdev_remove_file(s
, &attr_pir
);
475 #endif /* CONFIG_PPC64 */
477 cacheinfo_cpu_offline(cpu
);
480 #ifdef CONFIG_ARCH_CPU_PROBE_RELEASE
481 ssize_t
arch_cpu_probe(const char *buf
, size_t count
)
483 if (ppc_md
.cpu_probe
)
484 return ppc_md
.cpu_probe(buf
, count
);
489 ssize_t
arch_cpu_release(const char *buf
, size_t count
)
491 if (ppc_md
.cpu_release
)
492 return ppc_md
.cpu_release(buf
, count
);
496 #endif /* CONFIG_ARCH_CPU_PROBE_RELEASE */
498 #endif /* CONFIG_HOTPLUG_CPU */
500 static int __cpuinit
sysfs_cpu_notify(struct notifier_block
*self
,
501 unsigned long action
, void *hcpu
)
503 unsigned int cpu
= (unsigned int)(long)hcpu
;
507 case CPU_ONLINE_FROZEN
:
508 register_cpu_online(cpu
);
510 #ifdef CONFIG_HOTPLUG_CPU
512 case CPU_DEAD_FROZEN
:
513 unregister_cpu_online(cpu
);
520 static struct notifier_block __cpuinitdata sysfs_cpu_nb
= {
521 .notifier_call
= sysfs_cpu_notify
,
524 static DEFINE_MUTEX(cpu_mutex
);
526 int cpu_add_sysdev_attr(struct sysdev_attribute
*attr
)
530 mutex_lock(&cpu_mutex
);
532 for_each_possible_cpu(cpu
) {
533 sysdev_create_file(get_cpu_sysdev(cpu
), attr
);
536 mutex_unlock(&cpu_mutex
);
539 EXPORT_SYMBOL_GPL(cpu_add_sysdev_attr
);
541 int cpu_add_sysdev_attr_group(struct attribute_group
*attrs
)
544 struct sys_device
*sysdev
;
547 mutex_lock(&cpu_mutex
);
549 for_each_possible_cpu(cpu
) {
550 sysdev
= get_cpu_sysdev(cpu
);
551 ret
= sysfs_create_group(&sysdev
->kobj
, attrs
);
555 mutex_unlock(&cpu_mutex
);
558 EXPORT_SYMBOL_GPL(cpu_add_sysdev_attr_group
);
561 void cpu_remove_sysdev_attr(struct sysdev_attribute
*attr
)
565 mutex_lock(&cpu_mutex
);
567 for_each_possible_cpu(cpu
) {
568 sysdev_remove_file(get_cpu_sysdev(cpu
), attr
);
571 mutex_unlock(&cpu_mutex
);
573 EXPORT_SYMBOL_GPL(cpu_remove_sysdev_attr
);
575 void cpu_remove_sysdev_attr_group(struct attribute_group
*attrs
)
578 struct sys_device
*sysdev
;
580 mutex_lock(&cpu_mutex
);
582 for_each_possible_cpu(cpu
) {
583 sysdev
= get_cpu_sysdev(cpu
);
584 sysfs_remove_group(&sysdev
->kobj
, attrs
);
587 mutex_unlock(&cpu_mutex
);
589 EXPORT_SYMBOL_GPL(cpu_remove_sysdev_attr_group
);
595 static void register_nodes(void)
599 for (i
= 0; i
< MAX_NUMNODES
; i
++)
600 register_one_node(i
);
603 int sysfs_add_device_to_node(struct sys_device
*dev
, int nid
)
605 struct node
*node
= &node_devices
[nid
];
606 return sysfs_create_link(&node
->sysdev
.kobj
, &dev
->kobj
,
607 kobject_name(&dev
->kobj
));
609 EXPORT_SYMBOL_GPL(sysfs_add_device_to_node
);
611 void sysfs_remove_device_from_node(struct sys_device
*dev
, int nid
)
613 struct node
*node
= &node_devices
[nid
];
614 sysfs_remove_link(&node
->sysdev
.kobj
, kobject_name(&dev
->kobj
));
616 EXPORT_SYMBOL_GPL(sysfs_remove_device_from_node
);
619 static void register_nodes(void)
626 /* Only valid if CPU is present. */
627 static ssize_t
show_physical_id(struct sys_device
*dev
,
628 struct sysdev_attribute
*attr
, char *buf
)
630 struct cpu
*cpu
= container_of(dev
, struct cpu
, sysdev
);
632 return sprintf(buf
, "%d\n", get_hard_smp_processor_id(cpu
->sysdev
.id
));
634 static SYSDEV_ATTR(physical_id
, 0444, show_physical_id
, NULL
);
636 static int __init
topology_init(void)
641 register_cpu_notifier(&sysfs_cpu_nb
);
643 for_each_possible_cpu(cpu
) {
644 struct cpu
*c
= &per_cpu(cpu_devices
, cpu
);
647 * For now, we just see if the system supports making
648 * the RTAS calls for CPU hotplug. But, there may be a
649 * more comprehensive way to do this for an individual
650 * CPU. For instance, the boot cpu might never be valid
656 if (cpu_online(cpu
) || c
->hotpluggable
) {
657 register_cpu(c
, cpu
);
659 sysdev_create_file(&c
->sysdev
, &attr_physical_id
);
663 register_cpu_online(cpu
);
666 sysfs_create_dscr_default();
667 #endif /* CONFIG_PPC64 */
671 subsys_initcall(topology_init
);