| #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/paca.h> |
| #include <asm/lppaca.h> |
| #include <asm/machdep.h> |
| #include <asm/smp.h> |
| |
| static DEFINE_PER_CPU(struct cpu, cpu_devices); |
| |
| /* SMT stuff */ |
| |
| #ifdef CONFIG_PPC_MULTIPLATFORM |
| /* 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_PPC_MULTIPLATFORM */ |
| |
| /* |
| * 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 ppc64_enable_pmcs(void) |
| { |
| /* 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(ppc64_enable_pmcs); |
| |
| /* XXX convert to rusty's on_one_cpu */ |
| static unsigned long run_on_cpu(unsigned long cpu, |
| unsigned long (*func)(unsigned long), |
| unsigned long arg) |
| { |
| cpumask_t old_affinity = current->cpus_allowed; |
| unsigned long ret; |
| |
| /* should return -EINVAL to userspace */ |
| if (set_cpus_allowed(current, cpumask_of_cpu(cpu))) |
| return 0; |
| |
| ret = func(arg); |
| |
| set_cpus_allowed(current, old_affinity); |
| |
| return ret; |
| } |
| |
| #define SYSFS_PMCSETUP(NAME, ADDRESS) \ |
| static unsigned long read_##NAME(unsigned long junk) \ |
| { \ |
| return mfspr(ADDRESS); \ |
| } \ |
| static unsigned long write_##NAME(unsigned long val) \ |
| { \ |
| ppc64_enable_pmcs(); \ |
| mtspr(ADDRESS, val); \ |
| return 0; \ |
| } \ |
| 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 = run_on_cpu(cpu->sysdev.id, read_##NAME, 0); \ |
| 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; \ |
| run_on_cpu(cpu->sysdev.id, write_##NAME, val); \ |
| return count; \ |
| } |
| |
| |
| /* Let's define all possible registers, we'll only hook up the ones |
| * that are implemented on the current processor |
| */ |
| |
| SYSFS_PMCSETUP(mmcr0, SPRN_MMCR0); |
| SYSFS_PMCSETUP(mmcr1, SPRN_MMCR1); |
| SYSFS_PMCSETUP(mmcra, SPRN_MMCRA); |
| 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); |
| SYSFS_PMCSETUP(pmc7, SPRN_PMC7); |
| SYSFS_PMCSETUP(pmc8, SPRN_PMC8); |
| SYSFS_PMCSETUP(purr, SPRN_PURR); |
| SYSFS_PMCSETUP(spurr, SPRN_SPURR); |
| SYSFS_PMCSETUP(dscr, SPRN_DSCR); |
| |
| 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 */ |
| |
| 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); |
| |
| static struct sysdev_attribute ibm_common_attrs[] = { |
| _SYSDEV_ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0), |
| _SYSDEV_ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1), |
| }; |
| |
| static struct sysdev_attribute ibm_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), |
| _SYSDEV_ATTR(pmc7, 0600, show_pmc7, store_pmc7), |
| _SYSDEV_ATTR(pmc8, 0600, show_pmc8, store_pmc8), |
| }; |
| |
| 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 */ |
| }; |
| |
| |
| static void 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; |
| |
| if (!firmware_has_feature(FW_FEATURE_ISERIES) && |
| cpu_has_feature(CPU_FTR_SMT)) |
| sysdev_create_file(s, &attr_smt_snooze_delay); |
| |
| /* PMC stuff */ |
| switch (cur_cpu_spec->pmc_type) { |
| case PPC_PMC_IBM: |
| attrs = ibm_common_attrs; |
| nattrs = sizeof(ibm_common_attrs) / sizeof(struct sysdev_attribute); |
| pmc_attrs = ibm_pmc_attrs; |
| break; |
| 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; |
| 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]); |
| |
| 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); |
| } |
| |
| #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); |
| |
| if (!firmware_has_feature(FW_FEATURE_ISERIES) && |
| cpu_has_feature(CPU_FTR_SMT)) |
| sysdev_remove_file(s, &attr_smt_snooze_delay); |
| |
| /* PMC stuff */ |
| switch (cur_cpu_spec->pmc_type) { |
| case PPC_PMC_IBM: |
| attrs = ibm_common_attrs; |
| nattrs = sizeof(ibm_common_attrs) / sizeof(struct sysdev_attribute); |
| pmc_attrs = ibm_pmc_attrs; |
| break; |
| 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; |
| 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]); |
| |
| 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_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); |