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>
22 #include "cacheinfo.h"
26 #include <asm/lppaca.h>
29 static DEFINE_PER_CPU(struct cpu, cpu_devices);
32 * SMT snooze delay stuff, 64-bit only for now
37 /* Time in microseconds we delay before sleeping in the idle loop */
38 DEFINE_PER_CPU(long, smt_snooze_delay) = { 100 };
40 static ssize_t store_smt_snooze_delay(struct sys_device *dev,
41 struct sysdev_attribute *attr,
45 struct cpu *cpu = container_of(dev, struct cpu, sysdev);
49 ret = sscanf(buf, "%ld", &snooze);
53 per_cpu(smt_snooze_delay, cpu->sysdev.id) = snooze;
58 static ssize_t show_smt_snooze_delay(struct sys_device *dev,
59 struct sysdev_attribute *attr,
62 struct cpu *cpu = container_of(dev, struct cpu, sysdev);
64 return sprintf(buf, "%ld\n", per_cpu(smt_snooze_delay, cpu->sysdev.id));
67 static SYSDEV_ATTR(smt_snooze_delay, 0644, show_smt_snooze_delay,
68 store_smt_snooze_delay);
70 static int __init setup_smt_snooze_delay(char *str)
75 if (!cpu_has_feature(CPU_FTR_SMT))
78 snooze = simple_strtol(str, NULL, 10);
79 for_each_possible_cpu(cpu)
80 per_cpu(smt_snooze_delay, cpu) = snooze;
84 __setup("smt-snooze-delay=", setup_smt_snooze_delay);
86 #endif /* CONFIG_PPC64 */
89 * Enabling PMCs will slow partition context switch times so we only do
90 * it the first time we write to the PMCs.
93 static DEFINE_PER_CPU(char, pmcs_enabled);
95 void ppc_enable_pmcs(void)
99 /* Only need to enable them once */
100 if (__get_cpu_var(pmcs_enabled))
103 __get_cpu_var(pmcs_enabled) = 1;
105 if (ppc_md.enable_pmcs)
106 ppc_md.enable_pmcs();
108 EXPORT_SYMBOL(ppc_enable_pmcs);
110 #define SYSFS_PMCSETUP(NAME, ADDRESS) \
111 static void read_##NAME(void *val) \
113 *(unsigned long *)val = mfspr(ADDRESS); \
115 static void write_##NAME(void *val) \
118 mtspr(ADDRESS, *(unsigned long *)val); \
120 static ssize_t show_##NAME(struct sys_device *dev, \
121 struct sysdev_attribute *attr, \
124 struct cpu *cpu = container_of(dev, struct cpu, sysdev); \
126 smp_call_function_single(cpu->sysdev.id, read_##NAME, &val, 1); \
127 return sprintf(buf, "%lx\n", val); \
129 static ssize_t __used \
130 store_##NAME(struct sys_device *dev, struct sysdev_attribute *attr, \
131 const char *buf, size_t count) \
133 struct cpu *cpu = container_of(dev, struct cpu, sysdev); \
135 int ret = sscanf(buf, "%lx", &val); \
138 smp_call_function_single(cpu->sysdev.id, write_##NAME, &val, 1); \
143 /* Let's define all possible registers, we'll only hook up the ones
144 * that are implemented on the current processor
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
158 #ifdef HAS_PPC_PMC_CLASSIC
159 SYSFS_PMCSETUP(mmcr0, SPRN_MMCR0);
160 SYSFS_PMCSETUP(mmcr1, SPRN_MMCR1);
161 SYSFS_PMCSETUP(pmc1, SPRN_PMC1);
162 SYSFS_PMCSETUP(pmc2, SPRN_PMC2);
163 SYSFS_PMCSETUP(pmc3, SPRN_PMC3);
164 SYSFS_PMCSETUP(pmc4, SPRN_PMC4);
165 SYSFS_PMCSETUP(pmc5, SPRN_PMC5);
166 SYSFS_PMCSETUP(pmc6, SPRN_PMC6);
168 #ifdef HAS_PPC_PMC_G4
169 SYSFS_PMCSETUP(mmcr2, SPRN_MMCR2);
173 SYSFS_PMCSETUP(pmc7, SPRN_PMC7);
174 SYSFS_PMCSETUP(pmc8, SPRN_PMC8);
176 SYSFS_PMCSETUP(mmcra, SPRN_MMCRA);
177 SYSFS_PMCSETUP(purr, SPRN_PURR);
178 SYSFS_PMCSETUP(spurr, SPRN_SPURR);
179 SYSFS_PMCSETUP(dscr, SPRN_DSCR);
181 static SYSDEV_ATTR(mmcra, 0600, show_mmcra, store_mmcra);
182 static SYSDEV_ATTR(spurr, 0600, show_spurr, NULL);
183 static SYSDEV_ATTR(dscr, 0600, show_dscr, store_dscr);
184 static SYSDEV_ATTR(purr, 0600, show_purr, store_purr);
186 unsigned long dscr_default = 0;
187 EXPORT_SYMBOL(dscr_default);
189 static ssize_t show_dscr_default(struct sysdev_class *class,
190 struct sysdev_class_attribute *attr, char *buf)
192 return sprintf(buf, "%lx\n", dscr_default);
195 static void update_dscr(void *dummy)
197 if (!current->thread.dscr_inherit) {
198 current->thread.dscr = dscr_default;
199 mtspr(SPRN_DSCR, dscr_default);
203 static ssize_t __used store_dscr_default(struct sysdev_class *class,
204 struct sysdev_class_attribute *attr, const char *buf,
210 ret = sscanf(buf, "%lx", &val);
215 on_each_cpu(update_dscr, NULL, 1);
220 static SYSDEV_CLASS_ATTR(dscr_default, 0600,
221 show_dscr_default, store_dscr_default);
223 static void sysfs_create_dscr_default(void)
226 if (cpu_has_feature(CPU_FTR_DSCR))
227 err = sysfs_create_file(&cpu_sysdev_class.kset.kobj,
228 &attr_dscr_default.attr);
230 #endif /* CONFIG_PPC64 */
232 #ifdef HAS_PPC_PMC_PA6T
233 SYSFS_PMCSETUP(pa6t_pmc0, SPRN_PA6T_PMC0);
234 SYSFS_PMCSETUP(pa6t_pmc1, SPRN_PA6T_PMC1);
235 SYSFS_PMCSETUP(pa6t_pmc2, SPRN_PA6T_PMC2);
236 SYSFS_PMCSETUP(pa6t_pmc3, SPRN_PA6T_PMC3);
237 SYSFS_PMCSETUP(pa6t_pmc4, SPRN_PA6T_PMC4);
238 SYSFS_PMCSETUP(pa6t_pmc5, SPRN_PA6T_PMC5);
239 #ifdef CONFIG_DEBUG_KERNEL
240 SYSFS_PMCSETUP(hid0, SPRN_HID0);
241 SYSFS_PMCSETUP(hid1, SPRN_HID1);
242 SYSFS_PMCSETUP(hid4, SPRN_HID4);
243 SYSFS_PMCSETUP(hid5, SPRN_HID5);
244 SYSFS_PMCSETUP(ima0, SPRN_PA6T_IMA0);
245 SYSFS_PMCSETUP(ima1, SPRN_PA6T_IMA1);
246 SYSFS_PMCSETUP(ima2, SPRN_PA6T_IMA2);
247 SYSFS_PMCSETUP(ima3, SPRN_PA6T_IMA3);
248 SYSFS_PMCSETUP(ima4, SPRN_PA6T_IMA4);
249 SYSFS_PMCSETUP(ima5, SPRN_PA6T_IMA5);
250 SYSFS_PMCSETUP(ima6, SPRN_PA6T_IMA6);
251 SYSFS_PMCSETUP(ima7, SPRN_PA6T_IMA7);
252 SYSFS_PMCSETUP(ima8, SPRN_PA6T_IMA8);
253 SYSFS_PMCSETUP(ima9, SPRN_PA6T_IMA9);
254 SYSFS_PMCSETUP(imaat, SPRN_PA6T_IMAAT);
255 SYSFS_PMCSETUP(btcr, SPRN_PA6T_BTCR);
256 SYSFS_PMCSETUP(pccr, SPRN_PA6T_PCCR);
257 SYSFS_PMCSETUP(rpccr, SPRN_PA6T_RPCCR);
258 SYSFS_PMCSETUP(der, SPRN_PA6T_DER);
259 SYSFS_PMCSETUP(mer, SPRN_PA6T_MER);
260 SYSFS_PMCSETUP(ber, SPRN_PA6T_BER);
261 SYSFS_PMCSETUP(ier, SPRN_PA6T_IER);
262 SYSFS_PMCSETUP(sier, SPRN_PA6T_SIER);
263 SYSFS_PMCSETUP(siar, SPRN_PA6T_SIAR);
264 SYSFS_PMCSETUP(tsr0, SPRN_PA6T_TSR0);
265 SYSFS_PMCSETUP(tsr1, SPRN_PA6T_TSR1);
266 SYSFS_PMCSETUP(tsr2, SPRN_PA6T_TSR2);
267 SYSFS_PMCSETUP(tsr3, SPRN_PA6T_TSR3);
268 #endif /* CONFIG_DEBUG_KERNEL */
269 #endif /* HAS_PPC_PMC_PA6T */
271 #ifdef HAS_PPC_PMC_IBM
272 static struct sysdev_attribute ibm_common_attrs[] = {
273 _SYSDEV_ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0),
274 _SYSDEV_ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1),
276 #endif /* HAS_PPC_PMC_G4 */
278 #ifdef HAS_PPC_PMC_G4
279 static struct sysdev_attribute g4_common_attrs[] = {
280 _SYSDEV_ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0),
281 _SYSDEV_ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1),
282 _SYSDEV_ATTR(mmcr2, 0600, show_mmcr2, store_mmcr2),
284 #endif /* HAS_PPC_PMC_G4 */
286 static struct sysdev_attribute classic_pmc_attrs[] = {
287 _SYSDEV_ATTR(pmc1, 0600, show_pmc1, store_pmc1),
288 _SYSDEV_ATTR(pmc2, 0600, show_pmc2, store_pmc2),
289 _SYSDEV_ATTR(pmc3, 0600, show_pmc3, store_pmc3),
290 _SYSDEV_ATTR(pmc4, 0600, show_pmc4, store_pmc4),
291 _SYSDEV_ATTR(pmc5, 0600, show_pmc5, store_pmc5),
292 _SYSDEV_ATTR(pmc6, 0600, show_pmc6, store_pmc6),
294 _SYSDEV_ATTR(pmc7, 0600, show_pmc7, store_pmc7),
295 _SYSDEV_ATTR(pmc8, 0600, show_pmc8, store_pmc8),
299 #ifdef HAS_PPC_PMC_PA6T
300 static struct sysdev_attribute pa6t_attrs[] = {
301 _SYSDEV_ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0),
302 _SYSDEV_ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1),
303 _SYSDEV_ATTR(pmc0, 0600, show_pa6t_pmc0, store_pa6t_pmc0),
304 _SYSDEV_ATTR(pmc1, 0600, show_pa6t_pmc1, store_pa6t_pmc1),
305 _SYSDEV_ATTR(pmc2, 0600, show_pa6t_pmc2, store_pa6t_pmc2),
306 _SYSDEV_ATTR(pmc3, 0600, show_pa6t_pmc3, store_pa6t_pmc3),
307 _SYSDEV_ATTR(pmc4, 0600, show_pa6t_pmc4, store_pa6t_pmc4),
308 _SYSDEV_ATTR(pmc5, 0600, show_pa6t_pmc5, store_pa6t_pmc5),
309 #ifdef CONFIG_DEBUG_KERNEL
310 _SYSDEV_ATTR(hid0, 0600, show_hid0, store_hid0),
311 _SYSDEV_ATTR(hid1, 0600, show_hid1, store_hid1),
312 _SYSDEV_ATTR(hid4, 0600, show_hid4, store_hid4),
313 _SYSDEV_ATTR(hid5, 0600, show_hid5, store_hid5),
314 _SYSDEV_ATTR(ima0, 0600, show_ima0, store_ima0),
315 _SYSDEV_ATTR(ima1, 0600, show_ima1, store_ima1),
316 _SYSDEV_ATTR(ima2, 0600, show_ima2, store_ima2),
317 _SYSDEV_ATTR(ima3, 0600, show_ima3, store_ima3),
318 _SYSDEV_ATTR(ima4, 0600, show_ima4, store_ima4),
319 _SYSDEV_ATTR(ima5, 0600, show_ima5, store_ima5),
320 _SYSDEV_ATTR(ima6, 0600, show_ima6, store_ima6),
321 _SYSDEV_ATTR(ima7, 0600, show_ima7, store_ima7),
322 _SYSDEV_ATTR(ima8, 0600, show_ima8, store_ima8),
323 _SYSDEV_ATTR(ima9, 0600, show_ima9, store_ima9),
324 _SYSDEV_ATTR(imaat, 0600, show_imaat, store_imaat),
325 _SYSDEV_ATTR(btcr, 0600, show_btcr, store_btcr),
326 _SYSDEV_ATTR(pccr, 0600, show_pccr, store_pccr),
327 _SYSDEV_ATTR(rpccr, 0600, show_rpccr, store_rpccr),
328 _SYSDEV_ATTR(der, 0600, show_der, store_der),
329 _SYSDEV_ATTR(mer, 0600, show_mer, store_mer),
330 _SYSDEV_ATTR(ber, 0600, show_ber, store_ber),
331 _SYSDEV_ATTR(ier, 0600, show_ier, store_ier),
332 _SYSDEV_ATTR(sier, 0600, show_sier, store_sier),
333 _SYSDEV_ATTR(siar, 0600, show_siar, store_siar),
334 _SYSDEV_ATTR(tsr0, 0600, show_tsr0, store_tsr0),
335 _SYSDEV_ATTR(tsr1, 0600, show_tsr1, store_tsr1),
336 _SYSDEV_ATTR(tsr2, 0600, show_tsr2, store_tsr2),
337 _SYSDEV_ATTR(tsr3, 0600, show_tsr3, store_tsr3),
338 #endif /* CONFIG_DEBUG_KERNEL */
340 #endif /* HAS_PPC_PMC_PA6T */
341 #endif /* HAS_PPC_PMC_CLASSIC */
343 static void __cpuinit register_cpu_online(unsigned int cpu)
345 struct cpu *c = &per_cpu(cpu_devices, cpu);
346 struct sys_device *s = &c->sysdev;
347 struct sysdev_attribute *attrs, *pmc_attrs;
351 if (!firmware_has_feature(FW_FEATURE_ISERIES) &&
352 cpu_has_feature(CPU_FTR_SMT))
353 sysdev_create_file(s, &attr_smt_snooze_delay);
357 switch (cur_cpu_spec->pmc_type) {
358 #ifdef HAS_PPC_PMC_IBM
360 attrs = ibm_common_attrs;
361 nattrs = sizeof(ibm_common_attrs) / sizeof(struct sysdev_attribute);
362 pmc_attrs = classic_pmc_attrs;
364 #endif /* HAS_PPC_PMC_IBM */
365 #ifdef HAS_PPC_PMC_G4
367 attrs = g4_common_attrs;
368 nattrs = sizeof(g4_common_attrs) / sizeof(struct sysdev_attribute);
369 pmc_attrs = classic_pmc_attrs;
371 #endif /* HAS_PPC_PMC_G4 */
372 #ifdef HAS_PPC_PMC_PA6T
374 /* PA Semi starts counting at PMC0 */
376 nattrs = sizeof(pa6t_attrs) / sizeof(struct sysdev_attribute);
379 #endif /* HAS_PPC_PMC_PA6T */
386 for (i = 0; i < nattrs; i++)
387 sysdev_create_file(s, &attrs[i]);
390 for (i = 0; i < cur_cpu_spec->num_pmcs; i++)
391 sysdev_create_file(s, &pmc_attrs[i]);
394 if (cpu_has_feature(CPU_FTR_MMCRA))
395 sysdev_create_file(s, &attr_mmcra);
397 if (cpu_has_feature(CPU_FTR_PURR))
398 sysdev_create_file(s, &attr_purr);
400 if (cpu_has_feature(CPU_FTR_SPURR))
401 sysdev_create_file(s, &attr_spurr);
403 if (cpu_has_feature(CPU_FTR_DSCR))
404 sysdev_create_file(s, &attr_dscr);
405 #endif /* CONFIG_PPC64 */
407 cacheinfo_cpu_online(cpu);
410 #ifdef CONFIG_HOTPLUG_CPU
411 static void unregister_cpu_online(unsigned int cpu)
413 struct cpu *c = &per_cpu(cpu_devices, cpu);
414 struct sys_device *s = &c->sysdev;
415 struct sysdev_attribute *attrs, *pmc_attrs;
418 BUG_ON(!c->hotpluggable);
421 if (!firmware_has_feature(FW_FEATURE_ISERIES) &&
422 cpu_has_feature(CPU_FTR_SMT))
423 sysdev_remove_file(s, &attr_smt_snooze_delay);
427 switch (cur_cpu_spec->pmc_type) {
428 #ifdef HAS_PPC_PMC_IBM
430 attrs = ibm_common_attrs;
431 nattrs = sizeof(ibm_common_attrs) / sizeof(struct sysdev_attribute);
432 pmc_attrs = classic_pmc_attrs;
434 #endif /* HAS_PPC_PMC_IBM */
435 #ifdef HAS_PPC_PMC_G4
437 attrs = g4_common_attrs;
438 nattrs = sizeof(g4_common_attrs) / sizeof(struct sysdev_attribute);
439 pmc_attrs = classic_pmc_attrs;
441 #endif /* HAS_PPC_PMC_G4 */
442 #ifdef HAS_PPC_PMC_PA6T
444 /* PA Semi starts counting at PMC0 */
446 nattrs = sizeof(pa6t_attrs) / sizeof(struct sysdev_attribute);
449 #endif /* HAS_PPC_PMC_PA6T */
456 for (i = 0; i < nattrs; i++)
457 sysdev_remove_file(s, &attrs[i]);
460 for (i = 0; i < cur_cpu_spec->num_pmcs; i++)
461 sysdev_remove_file(s, &pmc_attrs[i]);
464 if (cpu_has_feature(CPU_FTR_MMCRA))
465 sysdev_remove_file(s, &attr_mmcra);
467 if (cpu_has_feature(CPU_FTR_PURR))
468 sysdev_remove_file(s, &attr_purr);
470 if (cpu_has_feature(CPU_FTR_SPURR))
471 sysdev_remove_file(s, &attr_spurr);
473 if (cpu_has_feature(CPU_FTR_DSCR))
474 sysdev_remove_file(s, &attr_dscr);
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);