#include <linux/sysdev.h> #include <linux/cpu.h> #include <linux/smp.h> #include <linux/percpu.h> #include <linux/init.h> #include <linux/sched.h> #include <linux/module.h> #include <linux/nodemask.h> #include <linux/cpumask.h> #include <linux/notifier.h> #include <asm/current.h> #include <asm/processor.h> #include <asm/cputable.h> #include <asm/firmware.h> #include <asm/hvcall.h> #include <asm/prom.h> #include <asm/machdep.h> #include <asm/smp.h> #include <asm/pmc.h> #include "cacheinfo.h" #ifdef CONFIG_PPC64 #include <asm/paca.h> #include <asm/lppaca.h> #endif static DEFINE_PER_CPU(struct cpu, cpu_devices); /* * SMT snooze delay stuff, 64-bit only for now */ #ifdef CONFIG_PPC64 /* Time in microseconds we delay before sleeping in the idle loop */ DEFINE_PER_CPU(unsigned long, smt_snooze_delay) = { 100 }; static ssize_t store_smt_snooze_delay(struct sys_device *dev, struct sysdev_attribute *attr, const char *buf, size_t count) { struct cpu *cpu = container_of(dev, struct cpu, sysdev); ssize_t ret; unsigned long snooze; ret = sscanf(buf, "%lu", &snooze); if (ret != 1) return -EINVAL; per_cpu(smt_snooze_delay, cpu->sysdev.id) = snooze; return count; } static ssize_t show_smt_snooze_delay(struct sys_device *dev, struct sysdev_attribute *attr, char *buf) { struct cpu *cpu = container_of(dev, struct cpu, sysdev); return sprintf(buf, "%lu\n", per_cpu(smt_snooze_delay, cpu->sysdev.id)); } static SYSDEV_ATTR(smt_snooze_delay, 0644, show_smt_snooze_delay, store_smt_snooze_delay); /* Only parse OF options if the matching cmdline option was not specified */ static int smt_snooze_cmdline; static int __init smt_setup(void) { struct device_node *options; const unsigned int *val; unsigned int cpu; if (!cpu_has_feature(CPU_FTR_SMT)) return -ENODEV; options = of_find_node_by_path("/options"); if (!options) return -ENODEV; val = of_get_property(options, "ibm,smt-snooze-delay", NULL); if (!smt_snooze_cmdline && val) { for_each_possible_cpu(cpu) per_cpu(smt_snooze_delay, cpu) = *val; } of_node_put(options); return 0; } __initcall(smt_setup); static int __init setup_smt_snooze_delay(char *str) { unsigned int cpu; int snooze; if (!cpu_has_feature(CPU_FTR_SMT)) return 1; smt_snooze_cmdline = 1; if (get_option(&str, &snooze)) { for_each_possible_cpu(cpu) per_cpu(smt_snooze_delay, cpu) = snooze; } return 1; } __setup("smt-snooze-delay=", setup_smt_snooze_delay); #endif /* CONFIG_PPC64 */ /* * Enabling PMCs will slow partition context switch times so we only do * it the first time we write to the PMCs. */ static DEFINE_PER_CPU(char, pmcs_enabled); void ppc_enable_pmcs(void) { ppc_set_pmu_inuse(1); /* Only need to enable them once */ if (__get_cpu_var(pmcs_enabled)) return; __get_cpu_var(pmcs_enabled) = 1; if (ppc_md.enable_pmcs) ppc_md.enable_pmcs(); } EXPORT_SYMBOL(ppc_enable_pmcs); #define SYSFS_PMCSETUP(NAME, ADDRESS) \ static void read_##NAME(void *val) \ { \ *(unsigned long *)val = mfspr(ADDRESS); \ } \ static void write_##NAME(void *val) \ { \ ppc_enable_pmcs(); \ mtspr(ADDRESS, *(unsigned long *)val); \ } \ static ssize_t show_##NAME(struct sys_device *dev, \ struct sysdev_attribute *attr, \ char *buf) \ { \ struct cpu *cpu = container_of(dev, struct cpu, sysdev); \ unsigned long val; \ smp_call_function_single(cpu->sysdev.id, read_##NAME, &val, 1); \ return sprintf(buf, "%lx\n", val); \ } \ static ssize_t __used \ store_##NAME(struct sys_device *dev, struct sysdev_attribute *attr, \ const char *buf, size_t count) \ { \ struct cpu *cpu = container_of(dev, struct cpu, sysdev); \ unsigned long val; \ int ret = sscanf(buf, "%lx", &val); \ if (ret != 1) \ return -EINVAL; \ smp_call_function_single(cpu->sysdev.id, write_##NAME, &val, 1); \ return count; \ } /* Let's define all possible registers, we'll only hook up the ones * that are implemented on the current processor */ #if defined(CONFIG_PPC64) #define HAS_PPC_PMC_CLASSIC 1 #define HAS_PPC_PMC_IBM 1 #define HAS_PPC_PMC_PA6T 1 #elif defined(CONFIG_6xx) #define HAS_PPC_PMC_CLASSIC 1 #define HAS_PPC_PMC_IBM 1 #define HAS_PPC_PMC_G4 1 #endif #ifdef HAS_PPC_PMC_CLASSIC SYSFS_PMCSETUP(mmcr0, SPRN_MMCR0); SYSFS_PMCSETUP(mmcr1, SPRN_MMCR1); SYSFS_PMCSETUP(pmc1, SPRN_PMC1); SYSFS_PMCSETUP(pmc2, SPRN_PMC2); SYSFS_PMCSETUP(pmc3, SPRN_PMC3); SYSFS_PMCSETUP(pmc4, SPRN_PMC4); SYSFS_PMCSETUP(pmc5, SPRN_PMC5); SYSFS_PMCSETUP(pmc6, SPRN_PMC6); #ifdef HAS_PPC_PMC_G4 SYSFS_PMCSETUP(mmcr2, SPRN_MMCR2); #endif #ifdef CONFIG_PPC64 SYSFS_PMCSETUP(pmc7, SPRN_PMC7); SYSFS_PMCSETUP(pmc8, SPRN_PMC8); SYSFS_PMCSETUP(mmcra, SPRN_MMCRA); SYSFS_PMCSETUP(purr, SPRN_PURR); SYSFS_PMCSETUP(spurr, SPRN_SPURR); SYSFS_PMCSETUP(dscr, SPRN_DSCR); static SYSDEV_ATTR(mmcra, 0600, show_mmcra, store_mmcra); static SYSDEV_ATTR(spurr, 0600, show_spurr, NULL); static SYSDEV_ATTR(dscr, 0600, show_dscr, store_dscr); static SYSDEV_ATTR(purr, 0600, show_purr, store_purr); #endif /* CONFIG_PPC64 */ #ifdef HAS_PPC_PMC_PA6T SYSFS_PMCSETUP(pa6t_pmc0, SPRN_PA6T_PMC0); SYSFS_PMCSETUP(pa6t_pmc1, SPRN_PA6T_PMC1); SYSFS_PMCSETUP(pa6t_pmc2, SPRN_PA6T_PMC2); SYSFS_PMCSETUP(pa6t_pmc3, SPRN_PA6T_PMC3); SYSFS_PMCSETUP(pa6t_pmc4, SPRN_PA6T_PMC4); SYSFS_PMCSETUP(pa6t_pmc5, SPRN_PA6T_PMC5); #ifdef CONFIG_DEBUG_KERNEL SYSFS_PMCSETUP(hid0, SPRN_HID0); SYSFS_PMCSETUP(hid1, SPRN_HID1); SYSFS_PMCSETUP(hid4, SPRN_HID4); SYSFS_PMCSETUP(hid5, SPRN_HID5); SYSFS_PMCSETUP(ima0, SPRN_PA6T_IMA0); SYSFS_PMCSETUP(ima1, SPRN_PA6T_IMA1); SYSFS_PMCSETUP(ima2, SPRN_PA6T_IMA2); SYSFS_PMCSETUP(ima3, SPRN_PA6T_IMA3); SYSFS_PMCSETUP(ima4, SPRN_PA6T_IMA4); SYSFS_PMCSETUP(ima5, SPRN_PA6T_IMA5); SYSFS_PMCSETUP(ima6, SPRN_PA6T_IMA6); SYSFS_PMCSETUP(ima7, SPRN_PA6T_IMA7); SYSFS_PMCSETUP(ima8, SPRN_PA6T_IMA8); SYSFS_PMCSETUP(ima9, SPRN_PA6T_IMA9); SYSFS_PMCSETUP(imaat, SPRN_PA6T_IMAAT); SYSFS_PMCSETUP(btcr, SPRN_PA6T_BTCR); SYSFS_PMCSETUP(pccr, SPRN_PA6T_PCCR); SYSFS_PMCSETUP(rpccr, SPRN_PA6T_RPCCR); SYSFS_PMCSETUP(der, SPRN_PA6T_DER); SYSFS_PMCSETUP(mer, SPRN_PA6T_MER); SYSFS_PMCSETUP(ber, SPRN_PA6T_BER); SYSFS_PMCSETUP(ier, SPRN_PA6T_IER); SYSFS_PMCSETUP(sier, SPRN_PA6T_SIER); SYSFS_PMCSETUP(siar, SPRN_PA6T_SIAR); SYSFS_PMCSETUP(tsr0, SPRN_PA6T_TSR0); SYSFS_PMCSETUP(tsr1, SPRN_PA6T_TSR1); SYSFS_PMCSETUP(tsr2, SPRN_PA6T_TSR2); SYSFS_PMCSETUP(tsr3, SPRN_PA6T_TSR3); #endif /* CONFIG_DEBUG_KERNEL */ #endif /* HAS_PPC_PMC_PA6T */ #ifdef HAS_PPC_PMC_IBM static struct sysdev_attribute ibm_common_attrs[] = { _SYSDEV_ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0), _SYSDEV_ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1), }; #endif /* HAS_PPC_PMC_G4 */ #ifdef HAS_PPC_PMC_G4 static struct sysdev_attribute g4_common_attrs[] = { _SYSDEV_ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0), _SYSDEV_ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1), _SYSDEV_ATTR(mmcr2, 0600, show_mmcr2, store_mmcr2), }; #endif /* HAS_PPC_PMC_G4 */ static struct sysdev_attribute classic_pmc_attrs[] = { _SYSDEV_ATTR(pmc1, 0600, show_pmc1, store_pmc1), _SYSDEV_ATTR(pmc2, 0600, show_pmc2, store_pmc2), _SYSDEV_ATTR(pmc3, 0600, show_pmc3, store_pmc3), _SYSDEV_ATTR(pmc4, 0600, show_pmc4, store_pmc4), _SYSDEV_ATTR(pmc5, 0600, show_pmc5, store_pmc5), _SYSDEV_ATTR(pmc6, 0600, show_pmc6, store_pmc6), #ifdef CONFIG_PPC64 _SYSDEV_ATTR(pmc7, 0600, show_pmc7, store_pmc7), _SYSDEV_ATTR(pmc8, 0600, show_pmc8, store_pmc8), #endif }; #ifdef HAS_PPC_PMC_PA6T static struct sysdev_attribute pa6t_attrs[] = { _SYSDEV_ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0), _SYSDEV_ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1), _SYSDEV_ATTR(pmc0, 0600, show_pa6t_pmc0, store_pa6t_pmc0), _SYSDEV_ATTR(pmc1, 0600, show_pa6t_pmc1, store_pa6t_pmc1), _SYSDEV_ATTR(pmc2, 0600, show_pa6t_pmc2, store_pa6t_pmc2), _SYSDEV_ATTR(pmc3, 0600, show_pa6t_pmc3, store_pa6t_pmc3), _SYSDEV_ATTR(pmc4, 0600, show_pa6t_pmc4, store_pa6t_pmc4), _SYSDEV_ATTR(pmc5, 0600, show_pa6t_pmc5, store_pa6t_pmc5), #ifdef CONFIG_DEBUG_KERNEL _SYSDEV_ATTR(hid0, 0600, show_hid0, store_hid0), _SYSDEV_ATTR(hid1, 0600, show_hid1, store_hid1), _SYSDEV_ATTR(hid4, 0600, show_hid4, store_hid4), _SYSDEV_ATTR(hid5, 0600, show_hid5, store_hid5), _SYSDEV_ATTR(ima0, 0600, show_ima0, store_ima0), _SYSDEV_ATTR(ima1, 0600, show_ima1, store_ima1), _SYSDEV_ATTR(ima2, 0600, show_ima2, store_ima2), _SYSDEV_ATTR(ima3, 0600, show_ima3, store_ima3), _SYSDEV_ATTR(ima4, 0600, show_ima4, store_ima4), _SYSDEV_ATTR(ima5, 0600, show_ima5, store_ima5), _SYSDEV_ATTR(ima6, 0600, show_ima6, store_ima6), _SYSDEV_ATTR(ima7, 0600, show_ima7, store_ima7), _SYSDEV_ATTR(ima8, 0600, show_ima8, store_ima8), _SYSDEV_ATTR(ima9, 0600, show_ima9, store_ima9), _SYSDEV_ATTR(imaat, 0600, show_imaat, store_imaat), _SYSDEV_ATTR(btcr, 0600, show_btcr, store_btcr), _SYSDEV_ATTR(pccr, 0600, show_pccr, store_pccr), _SYSDEV_ATTR(rpccr, 0600, show_rpccr, store_rpccr), _SYSDEV_ATTR(der, 0600, show_der, store_der), _SYSDEV_ATTR(mer, 0600, show_mer, store_mer), _SYSDEV_ATTR(ber, 0600, show_ber, store_ber), _SYSDEV_ATTR(ier, 0600, show_ier, store_ier), _SYSDEV_ATTR(sier, 0600, show_sier, store_sier), _SYSDEV_ATTR(siar, 0600, show_siar, store_siar), _SYSDEV_ATTR(tsr0, 0600, show_tsr0, store_tsr0), _SYSDEV_ATTR(tsr1, 0600, show_tsr1, store_tsr1), _SYSDEV_ATTR(tsr2, 0600, show_tsr2, store_tsr2), _SYSDEV_ATTR(tsr3, 0600, show_tsr3, store_tsr3), #endif /* CONFIG_DEBUG_KERNEL */ }; #endif /* HAS_PPC_PMC_PA6T */ #endif /* HAS_PPC_PMC_CLASSIC */ static void __cpuinit register_cpu_online(unsigned int cpu) { struct cpu *c = &per_cpu(cpu_devices, cpu); struct sys_device *s = &c->sysdev; struct sysdev_attribute *attrs, *pmc_attrs; int i, nattrs; #ifdef CONFIG_PPC64 if (!firmware_has_feature(FW_FEATURE_ISERIES) && cpu_has_feature(CPU_FTR_SMT)) sysdev_create_file(s, &attr_smt_snooze_delay); #endif /* PMC stuff */ switch (cur_cpu_spec->pmc_type) { #ifdef HAS_PPC_PMC_IBM case PPC_PMC_IBM: attrs = ibm_common_attrs; nattrs = sizeof(ibm_common_attrs) / sizeof(struct sysdev_attribute); pmc_attrs = classic_pmc_attrs; break; #endif /* HAS_PPC_PMC_IBM */ #ifdef HAS_PPC_PMC_G4 case PPC_PMC_G4: attrs = g4_common_attrs; nattrs = sizeof(g4_common_attrs) / sizeof(struct sysdev_attribute); pmc_attrs = classic_pmc_attrs; break; #endif /* HAS_PPC_PMC_G4 */ #ifdef HAS_PPC_PMC_PA6T case PPC_PMC_PA6T: /* PA Semi starts counting at PMC0 */ attrs = pa6t_attrs; nattrs = sizeof(pa6t_attrs) / sizeof(struct sysdev_attribute); pmc_attrs = NULL; break; #endif /* HAS_PPC_PMC_PA6T */ default: attrs = NULL; nattrs = 0; pmc_attrs = NULL; } for (i = 0; i < nattrs; i++) sysdev_create_file(s, &attrs[i]); if (pmc_attrs) for (i = 0; i < cur_cpu_spec->num_pmcs; i++) sysdev_create_file(s, &pmc_attrs[i]); #ifdef CONFIG_PPC64 if (cpu_has_feature(CPU_FTR_MMCRA)) sysdev_create_file(s, &attr_mmcra); if (cpu_has_feature(CPU_FTR_PURR)) sysdev_create_file(s, &attr_purr); if (cpu_has_feature(CPU_FTR_SPURR)) sysdev_create_file(s, &attr_spurr); if (cpu_has_feature(CPU_FTR_DSCR)) sysdev_create_file(s, &attr_dscr); #endif /* CONFIG_PPC64 */ cacheinfo_cpu_online(cpu); } #ifdef CONFIG_HOTPLUG_CPU static void unregister_cpu_online(unsigned int cpu) { struct cpu *c = &per_cpu(cpu_devices, cpu); struct sys_device *s = &c->sysdev; struct sysdev_attribute *attrs, *pmc_attrs; int i, nattrs; BUG_ON(!c->hotpluggable); #ifdef CONFIG_PPC64 if (!firmware_has_feature(FW_FEATURE_ISERIES) && cpu_has_feature(CPU_FTR_SMT)) sysdev_remove_file(s, &attr_smt_snooze_delay); #endif /* PMC stuff */ switch (cur_cpu_spec->pmc_type) { #ifdef HAS_PPC_PMC_IBM case PPC_PMC_IBM: attrs = ibm_common_attrs; nattrs = sizeof(ibm_common_attrs) / sizeof(struct sysdev_attribute); pmc_attrs = classic_pmc_attrs; break; #endif /* HAS_PPC_PMC_IBM */ #ifdef HAS_PPC_PMC_G4 case PPC_PMC_G4: attrs = g4_common_attrs; nattrs = sizeof(g4_common_attrs) / sizeof(struct sysdev_attribute); pmc_attrs = classic_pmc_attrs; break; #endif /* HAS_PPC_PMC_G4 */ #ifdef HAS_PPC_PMC_PA6T case PPC_PMC_PA6T: /* PA Semi starts counting at PMC0 */ attrs = pa6t_attrs; nattrs = sizeof(pa6t_attrs) / sizeof(struct sysdev_attribute); pmc_attrs = NULL; break; #endif /* HAS_PPC_PMC_PA6T */ default: attrs = NULL; nattrs = 0; pmc_attrs = NULL; } for (i = 0; i < nattrs; i++) sysdev_remove_file(s, &attrs[i]); if (pmc_attrs) for (i = 0; i < cur_cpu_spec->num_pmcs; i++) sysdev_remove_file(s, &pmc_attrs[i]); #ifdef CONFIG_PPC64 if (cpu_has_feature(CPU_FTR_MMCRA)) sysdev_remove_file(s, &attr_mmcra); if (cpu_has_feature(CPU_FTR_PURR)) sysdev_remove_file(s, &attr_purr); if (cpu_has_feature(CPU_FTR_SPURR)) sysdev_remove_file(s, &attr_spurr); if (cpu_has_feature(CPU_FTR_DSCR)) sysdev_remove_file(s, &attr_dscr); #endif /* CONFIG_PPC64 */ cacheinfo_cpu_offline(cpu); } #ifdef CONFIG_ARCH_CPU_PROBE_RELEASE ssize_t arch_cpu_probe(const char *buf, size_t count) { if (ppc_md.cpu_probe) return ppc_md.cpu_probe(buf, count); return -EINVAL; } ssize_t arch_cpu_release(const char *buf, size_t count) { if (ppc_md.cpu_release) return ppc_md.cpu_release(buf, count); return -EINVAL; } #endif /* CONFIG_ARCH_CPU_PROBE_RELEASE */ #endif /* CONFIG_HOTPLUG_CPU */ static int __cpuinit sysfs_cpu_notify(struct notifier_block *self, unsigned long action, void *hcpu) { unsigned int cpu = (unsigned int)(long)hcpu; switch (action) { case CPU_ONLINE: case CPU_ONLINE_FROZEN: register_cpu_online(cpu); break; #ifdef CONFIG_HOTPLUG_CPU case CPU_DEAD: case CPU_DEAD_FROZEN: unregister_cpu_online(cpu); break; #endif } return NOTIFY_OK; } static struct notifier_block __cpuinitdata sysfs_cpu_nb = { .notifier_call = sysfs_cpu_notify, }; static DEFINE_MUTEX(cpu_mutex); int cpu_add_sysdev_attr(struct sysdev_attribute *attr) { int cpu; mutex_lock(&cpu_mutex); for_each_possible_cpu(cpu) { sysdev_create_file(get_cpu_sysdev(cpu), attr); } mutex_unlock(&cpu_mutex); return 0; } EXPORT_SYMBOL_GPL(cpu_add_sysdev_attr); int cpu_add_sysdev_attr_group(struct attribute_group *attrs) { int cpu; struct sys_device *sysdev; int ret; mutex_lock(&cpu_mutex); for_each_possible_cpu(cpu) { sysdev = get_cpu_sysdev(cpu); ret = sysfs_create_group(&sysdev->kobj, attrs); WARN_ON(ret != 0); } mutex_unlock(&cpu_mutex); return 0; } EXPORT_SYMBOL_GPL(cpu_add_sysdev_attr_group); void cpu_remove_sysdev_attr(struct sysdev_attribute *attr) { int cpu; mutex_lock(&cpu_mutex); for_each_possible_cpu(cpu) { sysdev_remove_file(get_cpu_sysdev(cpu), attr); } mutex_unlock(&cpu_mutex); } EXPORT_SYMBOL_GPL(cpu_remove_sysdev_attr); void cpu_remove_sysdev_attr_group(struct attribute_group *attrs) { int cpu; struct sys_device *sysdev; mutex_lock(&cpu_mutex); for_each_possible_cpu(cpu) { sysdev = get_cpu_sysdev(cpu); sysfs_remove_group(&sysdev->kobj, attrs); } mutex_unlock(&cpu_mutex); } EXPORT_SYMBOL_GPL(cpu_remove_sysdev_attr_group); /* NUMA stuff */ #ifdef CONFIG_NUMA static void register_nodes(void) { int i; for (i = 0; i < MAX_NUMNODES; i++) register_one_node(i); } int sysfs_add_device_to_node(struct sys_device *dev, int nid) { struct node *node = &node_devices[nid]; return sysfs_create_link(&node->sysdev.kobj, &dev->kobj, kobject_name(&dev->kobj)); } EXPORT_SYMBOL_GPL(sysfs_add_device_to_node); void sysfs_remove_device_from_node(struct sys_device *dev, int nid) { struct node *node = &node_devices[nid]; sysfs_remove_link(&node->sysdev.kobj, kobject_name(&dev->kobj)); } EXPORT_SYMBOL_GPL(sysfs_remove_device_from_node); #else static void register_nodes(void) { return; } #endif /* Only valid if CPU is present. */ static ssize_t show_physical_id(struct sys_device *dev, struct sysdev_attribute *attr, char *buf) { struct cpu *cpu = container_of(dev, struct cpu, sysdev); return sprintf(buf, "%d\n", get_hard_smp_processor_id(cpu->sysdev.id)); } static SYSDEV_ATTR(physical_id, 0444, show_physical_id, NULL); static int __init topology_init(void) { int cpu; register_nodes(); register_cpu_notifier(&sysfs_cpu_nb); for_each_possible_cpu(cpu) { struct cpu *c = &per_cpu(cpu_devices, cpu); /* * For now, we just see if the system supports making * the RTAS calls for CPU hotplug. But, there may be a * more comprehensive way to do this for an individual * CPU. For instance, the boot cpu might never be valid * for hotplugging. */ if (ppc_md.cpu_die) c->hotpluggable = 1; if (cpu_online(cpu) || c->hotpluggable) { register_cpu(c, cpu); sysdev_create_file(&c->sysdev, &attr_physical_id); } if (cpu_online(cpu)) register_cpu_online(cpu); } return 0; } subsys_initcall(topology_init);