1 #include <linux/sysdev.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>
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(unsigned 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, "%lu", &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, "%lu\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 if (get_option(&str, &snooze)) {
79 for_each_possible_cpu(cpu)
80 per_cpu(smt_snooze_delay, cpu) = snooze;
85 __setup("smt-snooze-delay=", setup_smt_snooze_delay);
87 #endif /* CONFIG_PPC64 */
90 * Enabling PMCs will slow partition context switch times so we only do
91 * it the first time we write to the PMCs.
94 static DEFINE_PER_CPU(char, pmcs_enabled);
96 void ppc_enable_pmcs(void)
100 /* Only need to enable them once */
101 if (__get_cpu_var(pmcs_enabled))
104 __get_cpu_var(pmcs_enabled) = 1;
106 if (ppc_md.enable_pmcs)
107 ppc_md.enable_pmcs();
109 EXPORT_SYMBOL(ppc_enable_pmcs);
111 #define SYSFS_PMCSETUP(NAME, ADDRESS) \
112 static void read_##NAME(void *val) \
114 *(unsigned long *)val = mfspr(ADDRESS); \
116 static void write_##NAME(void *val) \
119 mtspr(ADDRESS, *(unsigned long *)val); \
121 static ssize_t show_##NAME(struct sys_device *dev, \
122 struct sysdev_attribute *attr, \
125 struct cpu *cpu = container_of(dev, struct cpu, sysdev); \
127 smp_call_function_single(cpu->sysdev.id, read_##NAME, &val, 1); \
128 return sprintf(buf, "%lx\n", val); \
130 static ssize_t __used \
131 store_##NAME(struct sys_device *dev, struct sysdev_attribute *attr, \
132 const char *buf, size_t count) \
134 struct cpu *cpu = container_of(dev, struct cpu, sysdev); \
136 int ret = sscanf(buf, "%lx", &val); \
139 smp_call_function_single(cpu->sysdev.id, write_##NAME, &val, 1); \
144 /* Let's define all possible registers, we'll only hook up the ones
145 * that are implemented on the current processor
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
159 #ifdef HAS_PPC_PMC_CLASSIC
160 SYSFS_PMCSETUP(mmcr0, SPRN_MMCR0);
161 SYSFS_PMCSETUP(mmcr1, SPRN_MMCR1);
162 SYSFS_PMCSETUP(pmc1, SPRN_PMC1);
163 SYSFS_PMCSETUP(pmc2, SPRN_PMC2);
164 SYSFS_PMCSETUP(pmc3, SPRN_PMC3);
165 SYSFS_PMCSETUP(pmc4, SPRN_PMC4);
166 SYSFS_PMCSETUP(pmc5, SPRN_PMC5);
167 SYSFS_PMCSETUP(pmc6, SPRN_PMC6);
169 #ifdef HAS_PPC_PMC_G4
170 SYSFS_PMCSETUP(mmcr2, SPRN_MMCR2);
174 SYSFS_PMCSETUP(pmc7, SPRN_PMC7);
175 SYSFS_PMCSETUP(pmc8, SPRN_PMC8);
177 SYSFS_PMCSETUP(mmcra, SPRN_MMCRA);
178 SYSFS_PMCSETUP(purr, SPRN_PURR);
179 SYSFS_PMCSETUP(spurr, SPRN_SPURR);
180 SYSFS_PMCSETUP(dscr, SPRN_DSCR);
182 static SYSDEV_ATTR(mmcra, 0600, show_mmcra, store_mmcra);
183 static SYSDEV_ATTR(spurr, 0600, show_spurr, NULL);
184 static SYSDEV_ATTR(dscr, 0600, show_dscr, store_dscr);
185 static SYSDEV_ATTR(purr, 0600, show_purr, store_purr);
186 #endif /* CONFIG_PPC64 */
188 #ifdef HAS_PPC_PMC_PA6T
189 SYSFS_PMCSETUP(pa6t_pmc0, SPRN_PA6T_PMC0);
190 SYSFS_PMCSETUP(pa6t_pmc1, SPRN_PA6T_PMC1);
191 SYSFS_PMCSETUP(pa6t_pmc2, SPRN_PA6T_PMC2);
192 SYSFS_PMCSETUP(pa6t_pmc3, SPRN_PA6T_PMC3);
193 SYSFS_PMCSETUP(pa6t_pmc4, SPRN_PA6T_PMC4);
194 SYSFS_PMCSETUP(pa6t_pmc5, SPRN_PA6T_PMC5);
195 #ifdef CONFIG_DEBUG_KERNEL
196 SYSFS_PMCSETUP(hid0, SPRN_HID0);
197 SYSFS_PMCSETUP(hid1, SPRN_HID1);
198 SYSFS_PMCSETUP(hid4, SPRN_HID4);
199 SYSFS_PMCSETUP(hid5, SPRN_HID5);
200 SYSFS_PMCSETUP(ima0, SPRN_PA6T_IMA0);
201 SYSFS_PMCSETUP(ima1, SPRN_PA6T_IMA1);
202 SYSFS_PMCSETUP(ima2, SPRN_PA6T_IMA2);
203 SYSFS_PMCSETUP(ima3, SPRN_PA6T_IMA3);
204 SYSFS_PMCSETUP(ima4, SPRN_PA6T_IMA4);
205 SYSFS_PMCSETUP(ima5, SPRN_PA6T_IMA5);
206 SYSFS_PMCSETUP(ima6, SPRN_PA6T_IMA6);
207 SYSFS_PMCSETUP(ima7, SPRN_PA6T_IMA7);
208 SYSFS_PMCSETUP(ima8, SPRN_PA6T_IMA8);
209 SYSFS_PMCSETUP(ima9, SPRN_PA6T_IMA9);
210 SYSFS_PMCSETUP(imaat, SPRN_PA6T_IMAAT);
211 SYSFS_PMCSETUP(btcr, SPRN_PA6T_BTCR);
212 SYSFS_PMCSETUP(pccr, SPRN_PA6T_PCCR);
213 SYSFS_PMCSETUP(rpccr, SPRN_PA6T_RPCCR);
214 SYSFS_PMCSETUP(der, SPRN_PA6T_DER);
215 SYSFS_PMCSETUP(mer, SPRN_PA6T_MER);
216 SYSFS_PMCSETUP(ber, SPRN_PA6T_BER);
217 SYSFS_PMCSETUP(ier, SPRN_PA6T_IER);
218 SYSFS_PMCSETUP(sier, SPRN_PA6T_SIER);
219 SYSFS_PMCSETUP(siar, SPRN_PA6T_SIAR);
220 SYSFS_PMCSETUP(tsr0, SPRN_PA6T_TSR0);
221 SYSFS_PMCSETUP(tsr1, SPRN_PA6T_TSR1);
222 SYSFS_PMCSETUP(tsr2, SPRN_PA6T_TSR2);
223 SYSFS_PMCSETUP(tsr3, SPRN_PA6T_TSR3);
224 #endif /* CONFIG_DEBUG_KERNEL */
225 #endif /* HAS_PPC_PMC_PA6T */
227 #ifdef HAS_PPC_PMC_IBM
228 static struct sysdev_attribute ibm_common_attrs[] = {
229 _SYSDEV_ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0),
230 _SYSDEV_ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1),
232 #endif /* HAS_PPC_PMC_G4 */
234 #ifdef HAS_PPC_PMC_G4
235 static struct sysdev_attribute g4_common_attrs[] = {
236 _SYSDEV_ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0),
237 _SYSDEV_ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1),
238 _SYSDEV_ATTR(mmcr2, 0600, show_mmcr2, store_mmcr2),
240 #endif /* HAS_PPC_PMC_G4 */
242 static struct sysdev_attribute classic_pmc_attrs[] = {
243 _SYSDEV_ATTR(pmc1, 0600, show_pmc1, store_pmc1),
244 _SYSDEV_ATTR(pmc2, 0600, show_pmc2, store_pmc2),
245 _SYSDEV_ATTR(pmc3, 0600, show_pmc3, store_pmc3),
246 _SYSDEV_ATTR(pmc4, 0600, show_pmc4, store_pmc4),
247 _SYSDEV_ATTR(pmc5, 0600, show_pmc5, store_pmc5),
248 _SYSDEV_ATTR(pmc6, 0600, show_pmc6, store_pmc6),
250 _SYSDEV_ATTR(pmc7, 0600, show_pmc7, store_pmc7),
251 _SYSDEV_ATTR(pmc8, 0600, show_pmc8, store_pmc8),
255 #ifdef HAS_PPC_PMC_PA6T
256 static struct sysdev_attribute pa6t_attrs[] = {
257 _SYSDEV_ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0),
258 _SYSDEV_ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1),
259 _SYSDEV_ATTR(pmc0, 0600, show_pa6t_pmc0, store_pa6t_pmc0),
260 _SYSDEV_ATTR(pmc1, 0600, show_pa6t_pmc1, store_pa6t_pmc1),
261 _SYSDEV_ATTR(pmc2, 0600, show_pa6t_pmc2, store_pa6t_pmc2),
262 _SYSDEV_ATTR(pmc3, 0600, show_pa6t_pmc3, store_pa6t_pmc3),
263 _SYSDEV_ATTR(pmc4, 0600, show_pa6t_pmc4, store_pa6t_pmc4),
264 _SYSDEV_ATTR(pmc5, 0600, show_pa6t_pmc5, store_pa6t_pmc5),
265 #ifdef CONFIG_DEBUG_KERNEL
266 _SYSDEV_ATTR(hid0, 0600, show_hid0, store_hid0),
267 _SYSDEV_ATTR(hid1, 0600, show_hid1, store_hid1),
268 _SYSDEV_ATTR(hid4, 0600, show_hid4, store_hid4),
269 _SYSDEV_ATTR(hid5, 0600, show_hid5, store_hid5),
270 _SYSDEV_ATTR(ima0, 0600, show_ima0, store_ima0),
271 _SYSDEV_ATTR(ima1, 0600, show_ima1, store_ima1),
272 _SYSDEV_ATTR(ima2, 0600, show_ima2, store_ima2),
273 _SYSDEV_ATTR(ima3, 0600, show_ima3, store_ima3),
274 _SYSDEV_ATTR(ima4, 0600, show_ima4, store_ima4),
275 _SYSDEV_ATTR(ima5, 0600, show_ima5, store_ima5),
276 _SYSDEV_ATTR(ima6, 0600, show_ima6, store_ima6),
277 _SYSDEV_ATTR(ima7, 0600, show_ima7, store_ima7),
278 _SYSDEV_ATTR(ima8, 0600, show_ima8, store_ima8),
279 _SYSDEV_ATTR(ima9, 0600, show_ima9, store_ima9),
280 _SYSDEV_ATTR(imaat, 0600, show_imaat, store_imaat),
281 _SYSDEV_ATTR(btcr, 0600, show_btcr, store_btcr),
282 _SYSDEV_ATTR(pccr, 0600, show_pccr, store_pccr),
283 _SYSDEV_ATTR(rpccr, 0600, show_rpccr, store_rpccr),
284 _SYSDEV_ATTR(der, 0600, show_der, store_der),
285 _SYSDEV_ATTR(mer, 0600, show_mer, store_mer),
286 _SYSDEV_ATTR(ber, 0600, show_ber, store_ber),
287 _SYSDEV_ATTR(ier, 0600, show_ier, store_ier),
288 _SYSDEV_ATTR(sier, 0600, show_sier, store_sier),
289 _SYSDEV_ATTR(siar, 0600, show_siar, store_siar),
290 _SYSDEV_ATTR(tsr0, 0600, show_tsr0, store_tsr0),
291 _SYSDEV_ATTR(tsr1, 0600, show_tsr1, store_tsr1),
292 _SYSDEV_ATTR(tsr2, 0600, show_tsr2, store_tsr2),
293 _SYSDEV_ATTR(tsr3, 0600, show_tsr3, store_tsr3),
294 #endif /* CONFIG_DEBUG_KERNEL */
296 #endif /* HAS_PPC_PMC_PA6T */
297 #endif /* HAS_PPC_PMC_CLASSIC */
299 static void __cpuinit register_cpu_online(unsigned int cpu)
301 struct cpu *c = &per_cpu(cpu_devices, cpu);
302 struct sys_device *s = &c->sysdev;
303 struct sysdev_attribute *attrs, *pmc_attrs;
307 if (!firmware_has_feature(FW_FEATURE_ISERIES) &&
308 cpu_has_feature(CPU_FTR_SMT))
309 sysdev_create_file(s, &attr_smt_snooze_delay);
313 switch (cur_cpu_spec->pmc_type) {
314 #ifdef HAS_PPC_PMC_IBM
316 attrs = ibm_common_attrs;
317 nattrs = sizeof(ibm_common_attrs) / sizeof(struct sysdev_attribute);
318 pmc_attrs = classic_pmc_attrs;
320 #endif /* HAS_PPC_PMC_IBM */
321 #ifdef HAS_PPC_PMC_G4
323 attrs = g4_common_attrs;
324 nattrs = sizeof(g4_common_attrs) / sizeof(struct sysdev_attribute);
325 pmc_attrs = classic_pmc_attrs;
327 #endif /* HAS_PPC_PMC_G4 */
328 #ifdef HAS_PPC_PMC_PA6T
330 /* PA Semi starts counting at PMC0 */
332 nattrs = sizeof(pa6t_attrs) / sizeof(struct sysdev_attribute);
335 #endif /* HAS_PPC_PMC_PA6T */
342 for (i = 0; i < nattrs; i++)
343 sysdev_create_file(s, &attrs[i]);
346 for (i = 0; i < cur_cpu_spec->num_pmcs; i++)
347 sysdev_create_file(s, &pmc_attrs[i]);
350 if (cpu_has_feature(CPU_FTR_MMCRA))
351 sysdev_create_file(s, &attr_mmcra);
353 if (cpu_has_feature(CPU_FTR_PURR))
354 sysdev_create_file(s, &attr_purr);
356 if (cpu_has_feature(CPU_FTR_SPURR))
357 sysdev_create_file(s, &attr_spurr);
359 if (cpu_has_feature(CPU_FTR_DSCR))
360 sysdev_create_file(s, &attr_dscr);
361 #endif /* CONFIG_PPC64 */
363 cacheinfo_cpu_online(cpu);
366 #ifdef CONFIG_HOTPLUG_CPU
367 static void unregister_cpu_online(unsigned int cpu)
369 struct cpu *c = &per_cpu(cpu_devices, cpu);
370 struct sys_device *s = &c->sysdev;
371 struct sysdev_attribute *attrs, *pmc_attrs;
374 BUG_ON(!c->hotpluggable);
377 if (!firmware_has_feature(FW_FEATURE_ISERIES) &&
378 cpu_has_feature(CPU_FTR_SMT))
379 sysdev_remove_file(s, &attr_smt_snooze_delay);
383 switch (cur_cpu_spec->pmc_type) {
384 #ifdef HAS_PPC_PMC_IBM
386 attrs = ibm_common_attrs;
387 nattrs = sizeof(ibm_common_attrs) / sizeof(struct sysdev_attribute);
388 pmc_attrs = classic_pmc_attrs;
390 #endif /* HAS_PPC_PMC_IBM */
391 #ifdef HAS_PPC_PMC_G4
393 attrs = g4_common_attrs;
394 nattrs = sizeof(g4_common_attrs) / sizeof(struct sysdev_attribute);
395 pmc_attrs = classic_pmc_attrs;
397 #endif /* HAS_PPC_PMC_G4 */
398 #ifdef HAS_PPC_PMC_PA6T
400 /* PA Semi starts counting at PMC0 */
402 nattrs = sizeof(pa6t_attrs) / sizeof(struct sysdev_attribute);
405 #endif /* HAS_PPC_PMC_PA6T */
412 for (i = 0; i < nattrs; i++)
413 sysdev_remove_file(s, &attrs[i]);
416 for (i = 0; i < cur_cpu_spec->num_pmcs; i++)
417 sysdev_remove_file(s, &pmc_attrs[i]);
420 if (cpu_has_feature(CPU_FTR_MMCRA))
421 sysdev_remove_file(s, &attr_mmcra);
423 if (cpu_has_feature(CPU_FTR_PURR))
424 sysdev_remove_file(s, &attr_purr);
426 if (cpu_has_feature(CPU_FTR_SPURR))
427 sysdev_remove_file(s, &attr_spurr);
429 if (cpu_has_feature(CPU_FTR_DSCR))
430 sysdev_remove_file(s, &attr_dscr);
431 #endif /* CONFIG_PPC64 */
433 cacheinfo_cpu_offline(cpu);
436 #ifdef CONFIG_ARCH_CPU_PROBE_RELEASE
437 ssize_t arch_cpu_probe(const char *buf, size_t count)
439 if (ppc_md.cpu_probe)
440 return ppc_md.cpu_probe(buf, count);
445 ssize_t arch_cpu_release(const char *buf, size_t count)
447 if (ppc_md.cpu_release)
448 return ppc_md.cpu_release(buf, count);
452 #endif /* CONFIG_ARCH_CPU_PROBE_RELEASE */
454 #endif /* CONFIG_HOTPLUG_CPU */
456 static int __cpuinit sysfs_cpu_notify(struct notifier_block *self,
457 unsigned long action, void *hcpu)
459 unsigned int cpu = (unsigned int)(long)hcpu;
463 case CPU_ONLINE_FROZEN:
464 register_cpu_online(cpu);
466 #ifdef CONFIG_HOTPLUG_CPU
468 case CPU_DEAD_FROZEN:
469 unregister_cpu_online(cpu);
476 static struct notifier_block __cpuinitdata sysfs_cpu_nb = {
477 .notifier_call = sysfs_cpu_notify,
480 static DEFINE_MUTEX(cpu_mutex);
482 int cpu_add_sysdev_attr(struct sysdev_attribute *attr)
486 mutex_lock(&cpu_mutex);
488 for_each_possible_cpu(cpu) {
489 sysdev_create_file(get_cpu_sysdev(cpu), attr);
492 mutex_unlock(&cpu_mutex);
495 EXPORT_SYMBOL_GPL(cpu_add_sysdev_attr);
497 int cpu_add_sysdev_attr_group(struct attribute_group *attrs)
500 struct sys_device *sysdev;
503 mutex_lock(&cpu_mutex);
505 for_each_possible_cpu(cpu) {
506 sysdev = get_cpu_sysdev(cpu);
507 ret = sysfs_create_group(&sysdev->kobj, attrs);
511 mutex_unlock(&cpu_mutex);
514 EXPORT_SYMBOL_GPL(cpu_add_sysdev_attr_group);
517 void cpu_remove_sysdev_attr(struct sysdev_attribute *attr)
521 mutex_lock(&cpu_mutex);
523 for_each_possible_cpu(cpu) {
524 sysdev_remove_file(get_cpu_sysdev(cpu), attr);
527 mutex_unlock(&cpu_mutex);
529 EXPORT_SYMBOL_GPL(cpu_remove_sysdev_attr);
531 void cpu_remove_sysdev_attr_group(struct attribute_group *attrs)
534 struct sys_device *sysdev;
536 mutex_lock(&cpu_mutex);
538 for_each_possible_cpu(cpu) {
539 sysdev = get_cpu_sysdev(cpu);
540 sysfs_remove_group(&sysdev->kobj, attrs);
543 mutex_unlock(&cpu_mutex);
545 EXPORT_SYMBOL_GPL(cpu_remove_sysdev_attr_group);
551 static void register_nodes(void)
555 for (i = 0; i < MAX_NUMNODES; i++)
556 register_one_node(i);
559 int sysfs_add_device_to_node(struct sys_device *dev, int nid)
561 struct node *node = &node_devices[nid];
562 return sysfs_create_link(&node->sysdev.kobj, &dev->kobj,
563 kobject_name(&dev->kobj));
565 EXPORT_SYMBOL_GPL(sysfs_add_device_to_node);
567 void sysfs_remove_device_from_node(struct sys_device *dev, int nid)
569 struct node *node = &node_devices[nid];
570 sysfs_remove_link(&node->sysdev.kobj, kobject_name(&dev->kobj));
572 EXPORT_SYMBOL_GPL(sysfs_remove_device_from_node);
575 static void register_nodes(void)
582 /* Only valid if CPU is present. */
583 static ssize_t show_physical_id(struct sys_device *dev,
584 struct sysdev_attribute *attr, char *buf)
586 struct cpu *cpu = container_of(dev, struct cpu, sysdev);
588 return sprintf(buf, "%d\n", get_hard_smp_processor_id(cpu->sysdev.id));
590 static SYSDEV_ATTR(physical_id, 0444, show_physical_id, NULL);
592 static int __init topology_init(void)
597 register_cpu_notifier(&sysfs_cpu_nb);
599 for_each_possible_cpu(cpu) {
600 struct cpu *c = &per_cpu(cpu_devices, cpu);
603 * For now, we just see if the system supports making
604 * the RTAS calls for CPU hotplug. But, there may be a
605 * more comprehensive way to do this for an individual
606 * CPU. For instance, the boot cpu might never be valid
612 if (cpu_online(cpu) || c->hotpluggable) {
613 register_cpu(c, cpu);
615 sysdev_create_file(&c->sysdev, &attr_physical_id);
619 register_cpu_online(cpu);
624 subsys_initcall(topology_init);