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>
21 #include "cacheinfo.h"
25 #include <asm/lppaca.h>
28 static DEFINE_PER_CPU(struct cpu, cpu_devices);
31 * SMT snooze delay stuff, 64-bit only for now
36 /* Time in microseconds we delay before sleeping in the idle loop */
37 DEFINE_PER_CPU(unsigned long, smt_snooze_delay) = { 100 };
39 static ssize_t store_smt_snooze_delay(struct sys_device *dev,
40 struct sysdev_attribute *attr,
44 struct cpu *cpu = container_of(dev, struct cpu, sysdev);
48 ret = sscanf(buf, "%lu", &snooze);
52 per_cpu(smt_snooze_delay, cpu->sysdev.id) = snooze;
57 static ssize_t show_smt_snooze_delay(struct sys_device *dev,
58 struct sysdev_attribute *attr,
61 struct cpu *cpu = container_of(dev, struct cpu, sysdev);
63 return sprintf(buf, "%lu\n", per_cpu(smt_snooze_delay, cpu->sysdev.id));
66 static SYSDEV_ATTR(smt_snooze_delay, 0644, show_smt_snooze_delay,
67 store_smt_snooze_delay);
69 /* Only parse OF options if the matching cmdline option was not specified */
70 static int smt_snooze_cmdline;
72 static int __init smt_setup(void)
74 struct device_node *options;
75 const unsigned int *val;
78 if (!cpu_has_feature(CPU_FTR_SMT))
81 options = of_find_node_by_path("/options");
85 val = of_get_property(options, "ibm,smt-snooze-delay", NULL);
86 if (!smt_snooze_cmdline && val) {
87 for_each_possible_cpu(cpu)
88 per_cpu(smt_snooze_delay, cpu) = *val;
94 __initcall(smt_setup);
96 static int __init setup_smt_snooze_delay(char *str)
101 if (!cpu_has_feature(CPU_FTR_SMT))
104 smt_snooze_cmdline = 1;
106 if (get_option(&str, &snooze)) {
107 for_each_possible_cpu(cpu)
108 per_cpu(smt_snooze_delay, cpu) = snooze;
113 __setup("smt-snooze-delay=", setup_smt_snooze_delay);
115 #endif /* CONFIG_PPC64 */
118 * Enabling PMCs will slow partition context switch times so we only do
119 * it the first time we write to the PMCs.
122 static DEFINE_PER_CPU(char, pmcs_enabled);
124 void ppc_enable_pmcs(void)
126 /* Only need to enable them once */
127 if (__get_cpu_var(pmcs_enabled))
130 __get_cpu_var(pmcs_enabled) = 1;
132 if (ppc_md.enable_pmcs)
133 ppc_md.enable_pmcs();
135 EXPORT_SYMBOL(ppc_enable_pmcs);
138 #define SYSFS_PMCSETUP(NAME, ADDRESS) \
139 static void read_##NAME(void *val) \
141 mtspr(ADDRESS, *(unsigned long *)val); \
143 static unsigned long write_##NAME(unsigned long val) \
146 mtspr(ADDRESS, *(unsigned long *)val); \
149 static ssize_t show_##NAME(struct sys_device *dev, \
150 struct sysdev_attribute *attr, \
153 struct cpu *cpu = container_of(dev, struct cpu, sysdev); \
155 smp_call_function_single(cpu->sysdev.id, read_##NAME, &val, 1); \
156 return sprintf(buf, "%lx\n", val); \
158 static ssize_t __used \
159 store_##NAME(struct sys_device *dev, struct sysdev_attribute *attr, \
160 const char *buf, size_t count) \
162 struct cpu *cpu = container_of(dev, struct cpu, sysdev); \
164 int ret = sscanf(buf, "%lx", &val); \
167 smp_call_function_single(cpu->sysdev.id, write_##NAME, &val, 1); \
172 /* Let's define all possible registers, we'll only hook up the ones
173 * that are implemented on the current processor
176 #if defined(CONFIG_PPC64)
177 #define HAS_PPC_PMC_CLASSIC 1
178 #define HAS_PPC_PMC_IBM 1
179 #define HAS_PPC_PMC_PA6T 1
180 #elif defined(CONFIG_6xx)
181 #define HAS_PPC_PMC_CLASSIC 1
182 #define HAS_PPC_PMC_IBM 1
183 #define HAS_PPC_PMC_G4 1
187 #ifdef HAS_PPC_PMC_CLASSIC
188 SYSFS_PMCSETUP(mmcr0, SPRN_MMCR0);
189 SYSFS_PMCSETUP(mmcr1, SPRN_MMCR1);
190 SYSFS_PMCSETUP(pmc1, SPRN_PMC1);
191 SYSFS_PMCSETUP(pmc2, SPRN_PMC2);
192 SYSFS_PMCSETUP(pmc3, SPRN_PMC3);
193 SYSFS_PMCSETUP(pmc4, SPRN_PMC4);
194 SYSFS_PMCSETUP(pmc5, SPRN_PMC5);
195 SYSFS_PMCSETUP(pmc6, SPRN_PMC6);
197 #ifdef HAS_PPC_PMC_G4
198 SYSFS_PMCSETUP(mmcr2, SPRN_MMCR2);
202 SYSFS_PMCSETUP(pmc7, SPRN_PMC7);
203 SYSFS_PMCSETUP(pmc8, SPRN_PMC8);
205 SYSFS_PMCSETUP(mmcra, SPRN_MMCRA);
206 SYSFS_PMCSETUP(purr, SPRN_PURR);
207 SYSFS_PMCSETUP(spurr, SPRN_SPURR);
208 SYSFS_PMCSETUP(dscr, SPRN_DSCR);
210 static SYSDEV_ATTR(mmcra, 0600, show_mmcra, store_mmcra);
211 static SYSDEV_ATTR(spurr, 0600, show_spurr, NULL);
212 static SYSDEV_ATTR(dscr, 0600, show_dscr, store_dscr);
213 static SYSDEV_ATTR(purr, 0600, show_purr, store_purr);
214 #endif /* CONFIG_PPC64 */
216 #ifdef HAS_PPC_PMC_PA6T
217 SYSFS_PMCSETUP(pa6t_pmc0, SPRN_PA6T_PMC0);
218 SYSFS_PMCSETUP(pa6t_pmc1, SPRN_PA6T_PMC1);
219 SYSFS_PMCSETUP(pa6t_pmc2, SPRN_PA6T_PMC2);
220 SYSFS_PMCSETUP(pa6t_pmc3, SPRN_PA6T_PMC3);
221 SYSFS_PMCSETUP(pa6t_pmc4, SPRN_PA6T_PMC4);
222 SYSFS_PMCSETUP(pa6t_pmc5, SPRN_PA6T_PMC5);
223 #ifdef CONFIG_DEBUG_KERNEL
224 SYSFS_PMCSETUP(hid0, SPRN_HID0);
225 SYSFS_PMCSETUP(hid1, SPRN_HID1);
226 SYSFS_PMCSETUP(hid4, SPRN_HID4);
227 SYSFS_PMCSETUP(hid5, SPRN_HID5);
228 SYSFS_PMCSETUP(ima0, SPRN_PA6T_IMA0);
229 SYSFS_PMCSETUP(ima1, SPRN_PA6T_IMA1);
230 SYSFS_PMCSETUP(ima2, SPRN_PA6T_IMA2);
231 SYSFS_PMCSETUP(ima3, SPRN_PA6T_IMA3);
232 SYSFS_PMCSETUP(ima4, SPRN_PA6T_IMA4);
233 SYSFS_PMCSETUP(ima5, SPRN_PA6T_IMA5);
234 SYSFS_PMCSETUP(ima6, SPRN_PA6T_IMA6);
235 SYSFS_PMCSETUP(ima7, SPRN_PA6T_IMA7);
236 SYSFS_PMCSETUP(ima8, SPRN_PA6T_IMA8);
237 SYSFS_PMCSETUP(ima9, SPRN_PA6T_IMA9);
238 SYSFS_PMCSETUP(imaat, SPRN_PA6T_IMAAT);
239 SYSFS_PMCSETUP(btcr, SPRN_PA6T_BTCR);
240 SYSFS_PMCSETUP(pccr, SPRN_PA6T_PCCR);
241 SYSFS_PMCSETUP(rpccr, SPRN_PA6T_RPCCR);
242 SYSFS_PMCSETUP(der, SPRN_PA6T_DER);
243 SYSFS_PMCSETUP(mer, SPRN_PA6T_MER);
244 SYSFS_PMCSETUP(ber, SPRN_PA6T_BER);
245 SYSFS_PMCSETUP(ier, SPRN_PA6T_IER);
246 SYSFS_PMCSETUP(sier, SPRN_PA6T_SIER);
247 SYSFS_PMCSETUP(siar, SPRN_PA6T_SIAR);
248 SYSFS_PMCSETUP(tsr0, SPRN_PA6T_TSR0);
249 SYSFS_PMCSETUP(tsr1, SPRN_PA6T_TSR1);
250 SYSFS_PMCSETUP(tsr2, SPRN_PA6T_TSR2);
251 SYSFS_PMCSETUP(tsr3, SPRN_PA6T_TSR3);
252 #endif /* CONFIG_DEBUG_KERNEL */
253 #endif /* HAS_PPC_PMC_PA6T */
255 #ifdef HAS_PPC_PMC_IBM
256 static struct sysdev_attribute ibm_common_attrs[] = {
257 _SYSDEV_ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0),
258 _SYSDEV_ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1),
260 #endif /* HAS_PPC_PMC_G4 */
262 #ifdef HAS_PPC_PMC_G4
263 static struct sysdev_attribute g4_common_attrs[] = {
264 _SYSDEV_ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0),
265 _SYSDEV_ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1),
266 _SYSDEV_ATTR(mmcr2, 0600, show_mmcr2, store_mmcr2),
268 #endif /* HAS_PPC_PMC_G4 */
270 static struct sysdev_attribute classic_pmc_attrs[] = {
271 _SYSDEV_ATTR(pmc1, 0600, show_pmc1, store_pmc1),
272 _SYSDEV_ATTR(pmc2, 0600, show_pmc2, store_pmc2),
273 _SYSDEV_ATTR(pmc3, 0600, show_pmc3, store_pmc3),
274 _SYSDEV_ATTR(pmc4, 0600, show_pmc4, store_pmc4),
275 _SYSDEV_ATTR(pmc5, 0600, show_pmc5, store_pmc5),
276 _SYSDEV_ATTR(pmc6, 0600, show_pmc6, store_pmc6),
278 _SYSDEV_ATTR(pmc7, 0600, show_pmc7, store_pmc7),
279 _SYSDEV_ATTR(pmc8, 0600, show_pmc8, store_pmc8),
283 #ifdef HAS_PPC_PMC_PA6T
284 static struct sysdev_attribute pa6t_attrs[] = {
285 _SYSDEV_ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0),
286 _SYSDEV_ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1),
287 _SYSDEV_ATTR(pmc0, 0600, show_pa6t_pmc0, store_pa6t_pmc0),
288 _SYSDEV_ATTR(pmc1, 0600, show_pa6t_pmc1, store_pa6t_pmc1),
289 _SYSDEV_ATTR(pmc2, 0600, show_pa6t_pmc2, store_pa6t_pmc2),
290 _SYSDEV_ATTR(pmc3, 0600, show_pa6t_pmc3, store_pa6t_pmc3),
291 _SYSDEV_ATTR(pmc4, 0600, show_pa6t_pmc4, store_pa6t_pmc4),
292 _SYSDEV_ATTR(pmc5, 0600, show_pa6t_pmc5, store_pa6t_pmc5),
293 #ifdef CONFIG_DEBUG_KERNEL
294 _SYSDEV_ATTR(hid0, 0600, show_hid0, store_hid0),
295 _SYSDEV_ATTR(hid1, 0600, show_hid1, store_hid1),
296 _SYSDEV_ATTR(hid4, 0600, show_hid4, store_hid4),
297 _SYSDEV_ATTR(hid5, 0600, show_hid5, store_hid5),
298 _SYSDEV_ATTR(ima0, 0600, show_ima0, store_ima0),
299 _SYSDEV_ATTR(ima1, 0600, show_ima1, store_ima1),
300 _SYSDEV_ATTR(ima2, 0600, show_ima2, store_ima2),
301 _SYSDEV_ATTR(ima3, 0600, show_ima3, store_ima3),
302 _SYSDEV_ATTR(ima4, 0600, show_ima4, store_ima4),
303 _SYSDEV_ATTR(ima5, 0600, show_ima5, store_ima5),
304 _SYSDEV_ATTR(ima6, 0600, show_ima6, store_ima6),
305 _SYSDEV_ATTR(ima7, 0600, show_ima7, store_ima7),
306 _SYSDEV_ATTR(ima8, 0600, show_ima8, store_ima8),
307 _SYSDEV_ATTR(ima9, 0600, show_ima9, store_ima9),
308 _SYSDEV_ATTR(imaat, 0600, show_imaat, store_imaat),
309 _SYSDEV_ATTR(btcr, 0600, show_btcr, store_btcr),
310 _SYSDEV_ATTR(pccr, 0600, show_pccr, store_pccr),
311 _SYSDEV_ATTR(rpccr, 0600, show_rpccr, store_rpccr),
312 _SYSDEV_ATTR(der, 0600, show_der, store_der),
313 _SYSDEV_ATTR(mer, 0600, show_mer, store_mer),
314 _SYSDEV_ATTR(ber, 0600, show_ber, store_ber),
315 _SYSDEV_ATTR(ier, 0600, show_ier, store_ier),
316 _SYSDEV_ATTR(sier, 0600, show_sier, store_sier),
317 _SYSDEV_ATTR(siar, 0600, show_siar, store_siar),
318 _SYSDEV_ATTR(tsr0, 0600, show_tsr0, store_tsr0),
319 _SYSDEV_ATTR(tsr1, 0600, show_tsr1, store_tsr1),
320 _SYSDEV_ATTR(tsr2, 0600, show_tsr2, store_tsr2),
321 _SYSDEV_ATTR(tsr3, 0600, show_tsr3, store_tsr3),
322 #endif /* CONFIG_DEBUG_KERNEL */
324 #endif /* HAS_PPC_PMC_PA6T */
325 #endif /* HAS_PPC_PMC_CLASSIC */
327 static void __cpuinit register_cpu_online(unsigned int cpu)
329 struct cpu *c = &per_cpu(cpu_devices, cpu);
330 struct sys_device *s = &c->sysdev;
331 struct sysdev_attribute *attrs, *pmc_attrs;
335 if (!firmware_has_feature(FW_FEATURE_ISERIES) &&
336 cpu_has_feature(CPU_FTR_SMT))
337 sysdev_create_file(s, &attr_smt_snooze_delay);
341 switch (cur_cpu_spec->pmc_type) {
342 #ifdef HAS_PPC_PMC_IBM
344 attrs = ibm_common_attrs;
345 nattrs = sizeof(ibm_common_attrs) / sizeof(struct sysdev_attribute);
346 pmc_attrs = classic_pmc_attrs;
348 #endif /* HAS_PPC_PMC_IBM */
349 #ifdef HAS_PPC_PMC_G4
351 attrs = g4_common_attrs;
352 nattrs = sizeof(g4_common_attrs) / sizeof(struct sysdev_attribute);
353 pmc_attrs = classic_pmc_attrs;
355 #endif /* HAS_PPC_PMC_G4 */
356 #ifdef HAS_PPC_PMC_PA6T
358 /* PA Semi starts counting at PMC0 */
360 nattrs = sizeof(pa6t_attrs) / sizeof(struct sysdev_attribute);
363 #endif /* HAS_PPC_PMC_PA6T */
370 for (i = 0; i < nattrs; i++)
371 sysdev_create_file(s, &attrs[i]);
374 for (i = 0; i < cur_cpu_spec->num_pmcs; i++)
375 sysdev_create_file(s, &pmc_attrs[i]);
378 if (cpu_has_feature(CPU_FTR_MMCRA))
379 sysdev_create_file(s, &attr_mmcra);
381 if (cpu_has_feature(CPU_FTR_PURR))
382 sysdev_create_file(s, &attr_purr);
384 if (cpu_has_feature(CPU_FTR_SPURR))
385 sysdev_create_file(s, &attr_spurr);
387 if (cpu_has_feature(CPU_FTR_DSCR))
388 sysdev_create_file(s, &attr_dscr);
389 #endif /* CONFIG_PPC64 */
391 cacheinfo_cpu_online(cpu);
394 #ifdef CONFIG_HOTPLUG_CPU
395 static void unregister_cpu_online(unsigned int cpu)
397 struct cpu *c = &per_cpu(cpu_devices, cpu);
398 struct sys_device *s = &c->sysdev;
399 struct sysdev_attribute *attrs, *pmc_attrs;
402 BUG_ON(!c->hotpluggable);
405 if (!firmware_has_feature(FW_FEATURE_ISERIES) &&
406 cpu_has_feature(CPU_FTR_SMT))
407 sysdev_remove_file(s, &attr_smt_snooze_delay);
411 switch (cur_cpu_spec->pmc_type) {
412 #ifdef HAS_PPC_PMC_IBM
414 attrs = ibm_common_attrs;
415 nattrs = sizeof(ibm_common_attrs) / sizeof(struct sysdev_attribute);
416 pmc_attrs = classic_pmc_attrs;
418 #endif /* HAS_PPC_PMC_IBM */
419 #ifdef HAS_PPC_PMC_G4
421 attrs = g4_common_attrs;
422 nattrs = sizeof(g4_common_attrs) / sizeof(struct sysdev_attribute);
423 pmc_attrs = classic_pmc_attrs;
425 #endif /* HAS_PPC_PMC_G4 */
426 #ifdef HAS_PPC_PMC_PA6T
428 /* PA Semi starts counting at PMC0 */
430 nattrs = sizeof(pa6t_attrs) / sizeof(struct sysdev_attribute);
433 #endif /* HAS_PPC_PMC_PA6T */
440 for (i = 0; i < nattrs; i++)
441 sysdev_remove_file(s, &attrs[i]);
444 for (i = 0; i < cur_cpu_spec->num_pmcs; i++)
445 sysdev_remove_file(s, &pmc_attrs[i]);
448 if (cpu_has_feature(CPU_FTR_MMCRA))
449 sysdev_remove_file(s, &attr_mmcra);
451 if (cpu_has_feature(CPU_FTR_PURR))
452 sysdev_remove_file(s, &attr_purr);
454 if (cpu_has_feature(CPU_FTR_SPURR))
455 sysdev_remove_file(s, &attr_spurr);
457 if (cpu_has_feature(CPU_FTR_DSCR))
458 sysdev_remove_file(s, &attr_dscr);
459 #endif /* CONFIG_PPC64 */
461 cacheinfo_cpu_offline(cpu);
463 #endif /* CONFIG_HOTPLUG_CPU */
465 static int __cpuinit sysfs_cpu_notify(struct notifier_block *self,
466 unsigned long action, void *hcpu)
468 unsigned int cpu = (unsigned int)(long)hcpu;
472 case CPU_ONLINE_FROZEN:
473 register_cpu_online(cpu);
475 #ifdef CONFIG_HOTPLUG_CPU
477 case CPU_DEAD_FROZEN:
478 unregister_cpu_online(cpu);
485 static struct notifier_block __cpuinitdata sysfs_cpu_nb = {
486 .notifier_call = sysfs_cpu_notify,
489 static DEFINE_MUTEX(cpu_mutex);
491 int cpu_add_sysdev_attr(struct sysdev_attribute *attr)
495 mutex_lock(&cpu_mutex);
497 for_each_possible_cpu(cpu) {
498 sysdev_create_file(get_cpu_sysdev(cpu), attr);
501 mutex_unlock(&cpu_mutex);
504 EXPORT_SYMBOL_GPL(cpu_add_sysdev_attr);
506 int cpu_add_sysdev_attr_group(struct attribute_group *attrs)
509 struct sys_device *sysdev;
512 mutex_lock(&cpu_mutex);
514 for_each_possible_cpu(cpu) {
515 sysdev = get_cpu_sysdev(cpu);
516 ret = sysfs_create_group(&sysdev->kobj, attrs);
520 mutex_unlock(&cpu_mutex);
523 EXPORT_SYMBOL_GPL(cpu_add_sysdev_attr_group);
526 void cpu_remove_sysdev_attr(struct sysdev_attribute *attr)
530 mutex_lock(&cpu_mutex);
532 for_each_possible_cpu(cpu) {
533 sysdev_remove_file(get_cpu_sysdev(cpu), attr);
536 mutex_unlock(&cpu_mutex);
538 EXPORT_SYMBOL_GPL(cpu_remove_sysdev_attr);
540 void cpu_remove_sysdev_attr_group(struct attribute_group *attrs)
543 struct sys_device *sysdev;
545 mutex_lock(&cpu_mutex);
547 for_each_possible_cpu(cpu) {
548 sysdev = get_cpu_sysdev(cpu);
549 sysfs_remove_group(&sysdev->kobj, attrs);
552 mutex_unlock(&cpu_mutex);
554 EXPORT_SYMBOL_GPL(cpu_remove_sysdev_attr_group);
560 static void register_nodes(void)
564 for (i = 0; i < MAX_NUMNODES; i++)
565 register_one_node(i);
568 int sysfs_add_device_to_node(struct sys_device *dev, int nid)
570 struct node *node = &node_devices[nid];
571 return sysfs_create_link(&node->sysdev.kobj, &dev->kobj,
572 kobject_name(&dev->kobj));
574 EXPORT_SYMBOL_GPL(sysfs_add_device_to_node);
576 void sysfs_remove_device_from_node(struct sys_device *dev, int nid)
578 struct node *node = &node_devices[nid];
579 sysfs_remove_link(&node->sysdev.kobj, kobject_name(&dev->kobj));
581 EXPORT_SYMBOL_GPL(sysfs_remove_device_from_node);
584 static void register_nodes(void)
591 /* Only valid if CPU is present. */
592 static ssize_t show_physical_id(struct sys_device *dev,
593 struct sysdev_attribute *attr, char *buf)
595 struct cpu *cpu = container_of(dev, struct cpu, sysdev);
597 return sprintf(buf, "%d\n", get_hard_smp_processor_id(cpu->sysdev.id));
599 static SYSDEV_ATTR(physical_id, 0444, show_physical_id, NULL);
601 static int __init topology_init(void)
606 register_cpu_notifier(&sysfs_cpu_nb);
608 for_each_possible_cpu(cpu) {
609 struct cpu *c = &per_cpu(cpu_devices, cpu);
612 * For now, we just see if the system supports making
613 * the RTAS calls for CPU hotplug. But, there may be a
614 * more comprehensive way to do this for an individual
615 * CPU. For instance, the boot cpu might never be valid
621 if (cpu_online(cpu) || c->hotpluggable) {
622 register_cpu(c, cpu);
624 sysdev_create_file(&c->sysdev, &attr_physical_id);
628 register_cpu_online(cpu);
633 subsys_initcall(topology_init);