[mirror_ubuntu-zesty-kernel.git] / arch / powerpc / kernel / sysfs.c

#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 "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)
{
	/* 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) \
{ \
	mtspr(ADDRESS, *(unsigned long *)val);	\
} \
static unsigned long write_##NAME(unsigned long val) \
{ \
	ppc_enable_pmcs(); \
	mtspr(ADDRESS, *(unsigned long *)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; \
	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);
}
#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);
Commit	Line	Data
1da177e4 LT	1	#include <linux/sysdev.h>
	2	#include <linux/cpu.h>
	3	#include <linux/smp.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>
	11
	12	#include <asm/current.h>
	13	#include <asm/processor.h>
	14	#include <asm/cputable.h>
1ababe11	15	#include <asm/firmware.h>
1da177e4 LT	16	#include <asm/hvcall.h>
1da177e4 LT	17	#include <asm/prom.h>
1da177e4	18	#include <asm/machdep.h>
2249ca9d	19	#include <asm/smp.h>
1da177e4	20
93197a36 NL	21	#include "cacheinfo.h"
93197a36 NL	22
b950bdd0 BH	23	#ifdef CONFIG_PPC64
	24	#include <asm/paca.h>
	25	#include <asm/lppaca.h>
	26	#endif
	27
1da177e4 LT	28	static DEFINE_PER_CPU(struct cpu, cpu_devices);
1da177e4 LT	29
b950bdd0 BH	30	/*
	31	* SMT snooze delay stuff, 64-bit only for now
	32	*/
	33
	34	#ifdef CONFIG_PPC64
1da177e4	35
0ddd3e7d AB	36	/* Time in microseconds we delay before sleeping in the idle loop */
0ddd3e7d AB	37	DEFINE_PER_CPU(unsigned long, smt_snooze_delay) = { 100 };
1da177e4	38
4a0b2b4d AK	39	static ssize_t store_smt_snooze_delay(struct sys_device *dev,
	40	struct sysdev_attribute *attr,
	41	const char *buf,
1da177e4 LT	42	size_t count)
	43	{
	44	struct cpu *cpu = container_of(dev, struct cpu, sysdev);
	45	ssize_t ret;
	46	unsigned long snooze;
	47
	48	ret = sscanf(buf, "%lu", &snooze);
	49	if (ret != 1)
	50	return -EINVAL;
	51
	52	per_cpu(smt_snooze_delay, cpu->sysdev.id) = snooze;
	53
	54	return count;
	55	}
	56
4a0b2b4d AK	57	static ssize_t show_smt_snooze_delay(struct sys_device *dev,
	58	struct sysdev_attribute *attr,
	59	char *buf)
1da177e4 LT	60	{
	61	struct cpu *cpu = container_of(dev, struct cpu, sysdev);
	62
	63	return sprintf(buf, "%lu\n", per_cpu(smt_snooze_delay, cpu->sysdev.id));
	64	}
	65
	66	static SYSDEV_ATTR(smt_snooze_delay, 0644, show_smt_snooze_delay,
	67	store_smt_snooze_delay);
	68
	69	/* Only parse OF options if the matching cmdline option was not specified */
	70	static int smt_snooze_cmdline;
	71
	72	static int __init smt_setup(void)
	73	{
	74	struct device_node *options;
a7f67bdf	75	const unsigned int *val;
1da177e4 LT	76	unsigned int cpu;
	77
	78	if (!cpu_has_feature(CPU_FTR_SMT))
69ed3324	79	return -ENODEV;
1da177e4	80
8c8dc322	81	options = of_find_node_by_path("/options");
1da177e4	82	if (!options)
69ed3324	83	return -ENODEV;
1da177e4	84
e2eb6392	85	val = of_get_property(options, "ibm,smt-snooze-delay", NULL);
1da177e4	86	if (!smt_snooze_cmdline && val) {
0e551954	87	for_each_possible_cpu(cpu)
1da177e4 LT	88	per_cpu(smt_snooze_delay, cpu) = *val;
	89	}
	90
8c8dc322	91	of_node_put(options);
69ed3324	92	return 0;
1da177e4 LT	93	}
	94	__initcall(smt_setup);
	95
	96	static int __init setup_smt_snooze_delay(char *str)
	97	{
	98	unsigned int cpu;
	99	int snooze;
	100
	101	if (!cpu_has_feature(CPU_FTR_SMT))
	102	return 1;
	103
	104	smt_snooze_cmdline = 1;
	105
	106	if (get_option(&str, &snooze)) {
0e551954	107	for_each_possible_cpu(cpu)
1da177e4 LT	108	per_cpu(smt_snooze_delay, cpu) = snooze;
	109	}
	110
	111	return 1;
	112	}
	113	__setup("smt-snooze-delay=", setup_smt_snooze_delay);
	114
b950bdd0	115	#endif /* CONFIG_PPC64 */
180a3362	116
1da177e4 LT	117	/*
	118	* Enabling PMCs will slow partition context switch times so we only do
	119	* it the first time we write to the PMCs.
	120	*/
	121
	122	static DEFINE_PER_CPU(char, pmcs_enabled);
	123
b950bdd0	124	void ppc_enable_pmcs(void)
1da177e4	125	{
1da177e4 LT	126	/* Only need to enable them once */
	127	if (__get_cpu_var(pmcs_enabled))
	128	return;
	129
	130	__get_cpu_var(pmcs_enabled) = 1;
	131
180a3362 ME	132	if (ppc_md.enable_pmcs)
180a3362 ME	133	ppc_md.enable_pmcs();
1da177e4	134	}
b950bdd0	135	EXPORT_SYMBOL(ppc_enable_pmcs);
1da177e4	136
1da177e4 LT	137
1da177e4 LT	138	#define SYSFS_PMCSETUP(NAME, ADDRESS) \
9a371934	139	static void read_##NAME(void *val) \
1da177e4	140	{ \
9a371934	141	mtspr(ADDRESS, (unsigned long )val); \
1da177e4 LT	142	} \
	143	static unsigned long write_##NAME(unsigned long val) \
	144	{ \
b950bdd0	145	ppc_enable_pmcs(); \
9a371934	146	mtspr(ADDRESS, (unsigned long )val); \
1da177e4 LT	147	return 0; \
1da177e4 LT	148	} \
4a0b2b4d AK	149	static ssize_t show_##NAME(struct sys_device *dev, \
	150	struct sysdev_attribute *attr, \
	151	char *buf) \
1da177e4 LT	152	{ \
1da177e4 LT	153	struct cpu *cpu = container_of(dev, struct cpu, sysdev); \
9a371934 RR	154	unsigned long val; \
9a371934 RR	155	smp_call_function_single(cpu->sysdev.id, read_##NAME, &val, 1); \
1da177e4 LT	156	return sprintf(buf, "%lx\n", val); \
1da177e4 LT	157	} \
3ff6eecc	158	static ssize_t __used \
4a0b2b4d AK	159	store_##NAME(struct sys_device dev, struct sysdev_attribute attr, \
4a0b2b4d AK	160	const char *buf, size_t count) \
1da177e4 LT	161	{ \
	162	struct cpu *cpu = container_of(dev, struct cpu, sysdev); \
	163	unsigned long val; \
	164	int ret = sscanf(buf, "%lx", &val); \
	165	if (ret != 1) \
	166	return -EINVAL; \
9a371934	167	smp_call_function_single(cpu->sysdev.id, write_##NAME, &val, 1); \
1da177e4 LT	168	return count; \
	169	}
	170
6529c13d OJ	171
	172	/* Let's define all possible registers, we'll only hook up the ones
	173	* that are implemented on the current processor
	174	*/
	175
33a7f122	176	#if defined(CONFIG_PPC64)
b950bdd0 BH	177	#define HAS_PPC_PMC_CLASSIC 1
	178	#define HAS_PPC_PMC_IBM 1
	179	#define HAS_PPC_PMC_PA6T 1
33a7f122	180	#elif defined(CONFIG_6xx)
b950bdd0 BH	181	#define HAS_PPC_PMC_CLASSIC 1
	182	#define HAS_PPC_PMC_IBM 1
	183	#define HAS_PPC_PMC_G4 1
	184	#endif
	185
	186
	187	#ifdef HAS_PPC_PMC_CLASSIC
1da177e4 LT	188	SYSFS_PMCSETUP(mmcr0, SPRN_MMCR0);
1da177e4 LT	189	SYSFS_PMCSETUP(mmcr1, SPRN_MMCR1);
1da177e4 LT	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);
b950bdd0 BH	196
	197	#ifdef HAS_PPC_PMC_G4
	198	SYSFS_PMCSETUP(mmcr2, SPRN_MMCR2);
	199	#endif
	200
	201	#ifdef CONFIG_PPC64
1da177e4 LT	202	SYSFS_PMCSETUP(pmc7, SPRN_PMC7);
1da177e4 LT	203	SYSFS_PMCSETUP(pmc8, SPRN_PMC8);
b950bdd0 BH	204
b950bdd0 BH	205	SYSFS_PMCSETUP(mmcra, SPRN_MMCRA);
1da177e4	206	SYSFS_PMCSETUP(purr, SPRN_PURR);
f050982a	207	SYSFS_PMCSETUP(spurr, SPRN_SPURR);
4c198557	208	SYSFS_PMCSETUP(dscr, SPRN_DSCR);
1da177e4	209
b950bdd0 BH	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 */
	215
	216	#ifdef HAS_PPC_PMC_PA6T
25fc530e OJ	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);
2e1957fd OJ	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 */
b950bdd0	253	#endif /* HAS_PPC_PMC_PA6T */
6529c13d	254
b950bdd0	255	#ifdef HAS_PPC_PMC_IBM
6529c13d OJ	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),
	259	};
b950bdd0 BH	260	#endif /* HAS_PPC_PMC_G4 */
	261
	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),
	267	};
	268	#endif /* HAS_PPC_PMC_G4 */
6529c13d	269
b950bdd0	270	static struct sysdev_attribute classic_pmc_attrs[] = {
6529c13d OJ	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),
b950bdd0	277	#ifdef CONFIG_PPC64
6529c13d OJ	278	_SYSDEV_ATTR(pmc7, 0600, show_pmc7, store_pmc7),
6529c13d OJ	279	_SYSDEV_ATTR(pmc8, 0600, show_pmc8, store_pmc8),
b950bdd0	280	#endif
6529c13d OJ	281	};
6529c13d OJ	282
b950bdd0	283	#ifdef HAS_PPC_PMC_PA6T
6529c13d OJ	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),
2e1957fd OJ	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 */
6529c13d	323	};
b950bdd0 BH	324	#endif /* HAS_PPC_PMC_PA6T */
b950bdd0 BH	325	#endif /* HAS_PPC_PMC_CLASSIC */
6529c13d	326
9ba1984e	327	static void __cpuinit register_cpu_online(unsigned int cpu)
1da177e4 LT	328	{
	329	struct cpu *c = &per_cpu(cpu_devices, cpu);
	330	struct sys_device *s = &c->sysdev;
6529c13d OJ	331	struct sysdev_attribute attrs, pmc_attrs;
6529c13d OJ	332	int i, nattrs;
1da177e4	333
b950bdd0	334	#ifdef CONFIG_PPC64
ad5cb17f SR	335	if (!firmware_has_feature(FW_FEATURE_ISERIES) &&
ad5cb17f SR	336	cpu_has_feature(CPU_FTR_SMT))
1da177e4	337	sysdev_create_file(s, &attr_smt_snooze_delay);
b950bdd0	338	#endif
1da177e4 LT	339
1da177e4 LT	340	/* PMC stuff */
6529c13d	341	switch (cur_cpu_spec->pmc_type) {
b950bdd0	342	#ifdef HAS_PPC_PMC_IBM
6529c13d OJ	343	case PPC_PMC_IBM:
	344	attrs = ibm_common_attrs;
	345	nattrs = sizeof(ibm_common_attrs) / sizeof(struct sysdev_attribute);
b950bdd0	346	pmc_attrs = classic_pmc_attrs;
6529c13d	347	break;
b950bdd0 BH	348	#endif /* HAS_PPC_PMC_IBM */
	349	#ifdef HAS_PPC_PMC_G4
	350	case PPC_PMC_G4:
	351	attrs = g4_common_attrs;
	352	nattrs = sizeof(g4_common_attrs) / sizeof(struct sysdev_attribute);
	353	pmc_attrs = classic_pmc_attrs;
	354	break;
	355	#endif /* HAS_PPC_PMC_G4 */
	356	#ifdef HAS_PPC_PMC_PA6T
6529c13d OJ	357	case PPC_PMC_PA6T:
	358	/* PA Semi starts counting at PMC0 */
	359	attrs = pa6t_attrs;
	360	nattrs = sizeof(pa6t_attrs) / sizeof(struct sysdev_attribute);
	361	pmc_attrs = NULL;
	362	break;
b950bdd0	363	#endif /* HAS_PPC_PMC_PA6T */
6529c13d OJ	364	default:
	365	attrs = NULL;
	366	nattrs = 0;
	367	pmc_attrs = NULL;
	368	}
	369
	370	for (i = 0; i < nattrs; i++)
	371	sysdev_create_file(s, &attrs[i]);
1da177e4	372
6529c13d OJ	373	if (pmc_attrs)
	374	for (i = 0; i < cur_cpu_spec->num_pmcs; i++)
	375	sysdev_create_file(s, &pmc_attrs[i]);
1da177e4	376
b950bdd0	377	#ifdef CONFIG_PPC64
1da177e4 LT	378	if (cpu_has_feature(CPU_FTR_MMCRA))
	379	sysdev_create_file(s, &attr_mmcra);
	380
afd05423	381	if (cpu_has_feature(CPU_FTR_PURR))
1da177e4	382	sysdev_create_file(s, &attr_purr);
4c198557	383
f050982a AB	384	if (cpu_has_feature(CPU_FTR_SPURR))
	385	sysdev_create_file(s, &attr_spurr);
	386
4c198557 AB	387	if (cpu_has_feature(CPU_FTR_DSCR))
4c198557 AB	388	sysdev_create_file(s, &attr_dscr);
b950bdd0	389	#endif /* CONFIG_PPC64 */
124c27d3	390
93197a36	391	cacheinfo_cpu_online(cpu);
1da177e4 LT	392	}
	393
	394	#ifdef CONFIG_HOTPLUG_CPU
	395	static void unregister_cpu_online(unsigned int cpu)
	396	{
	397	struct cpu *c = &per_cpu(cpu_devices, cpu);
	398	struct sys_device *s = &c->sysdev;
6529c13d OJ	399	struct sysdev_attribute attrs, pmc_attrs;
6529c13d OJ	400	int i, nattrs;
1da177e4	401
72486f1f	402	BUG_ON(!c->hotpluggable);
1da177e4	403
a1e0eb10	404	#ifdef CONFIG_PPC64
ad5cb17f SR	405	if (!firmware_has_feature(FW_FEATURE_ISERIES) &&
ad5cb17f SR	406	cpu_has_feature(CPU_FTR_SMT))
1da177e4	407	sysdev_remove_file(s, &attr_smt_snooze_delay);
a1e0eb10	408	#endif
1da177e4 LT	409
1da177e4 LT	410	/* PMC stuff */
6529c13d	411	switch (cur_cpu_spec->pmc_type) {
b950bdd0	412	#ifdef HAS_PPC_PMC_IBM
6529c13d OJ	413	case PPC_PMC_IBM:
	414	attrs = ibm_common_attrs;
	415	nattrs = sizeof(ibm_common_attrs) / sizeof(struct sysdev_attribute);
b950bdd0 BH	416	pmc_attrs = classic_pmc_attrs;
	417	break;
	418	#endif /* HAS_PPC_PMC_IBM */
	419	#ifdef HAS_PPC_PMC_G4
	420	case PPC_PMC_G4:
	421	attrs = g4_common_attrs;
	422	nattrs = sizeof(g4_common_attrs) / sizeof(struct sysdev_attribute);
	423	pmc_attrs = classic_pmc_attrs;
6529c13d	424	break;
b950bdd0 BH	425	#endif /* HAS_PPC_PMC_G4 */
b950bdd0 BH	426	#ifdef HAS_PPC_PMC_PA6T
6529c13d OJ	427	case PPC_PMC_PA6T:
	428	/* PA Semi starts counting at PMC0 */
	429	attrs = pa6t_attrs;
	430	nattrs = sizeof(pa6t_attrs) / sizeof(struct sysdev_attribute);
	431	pmc_attrs = NULL;
	432	break;
b950bdd0	433	#endif /* HAS_PPC_PMC_PA6T */
6529c13d OJ	434	default:
	435	attrs = NULL;
	436	nattrs = 0;
	437	pmc_attrs = NULL;
	438	}
1da177e4	439
6529c13d OJ	440	for (i = 0; i < nattrs; i++)
	441	sysdev_remove_file(s, &attrs[i]);
	442
	443	if (pmc_attrs)
	444	for (i = 0; i < cur_cpu_spec->num_pmcs; i++)
	445	sysdev_remove_file(s, &pmc_attrs[i]);
1da177e4	446
b950bdd0	447	#ifdef CONFIG_PPC64
1da177e4 LT	448	if (cpu_has_feature(CPU_FTR_MMCRA))
	449	sysdev_remove_file(s, &attr_mmcra);
	450
afd05423	451	if (cpu_has_feature(CPU_FTR_PURR))
1da177e4	452	sysdev_remove_file(s, &attr_purr);
4c198557	453
f050982a AB	454	if (cpu_has_feature(CPU_FTR_SPURR))
	455	sysdev_remove_file(s, &attr_spurr);
	456
4c198557 AB	457	if (cpu_has_feature(CPU_FTR_DSCR))
4c198557 AB	458	sysdev_remove_file(s, &attr_dscr);
b950bdd0	459	#endif /* CONFIG_PPC64 */
124c27d3	460
93197a36	461	cacheinfo_cpu_offline(cpu);
1da177e4 LT	462	}
	463	#endif /* CONFIG_HOTPLUG_CPU */
	464
8c78f307	465	static int __cpuinit sysfs_cpu_notify(struct notifier_block *self,
1da177e4 LT	466	unsigned long action, void *hcpu)
	467	{
	468	unsigned int cpu = (unsigned int)(long)hcpu;
	469
	470	switch (action) {
	471	case CPU_ONLINE:
8bb78442	472	case CPU_ONLINE_FROZEN:
1da177e4 LT	473	register_cpu_online(cpu);
	474	break;
	475	#ifdef CONFIG_HOTPLUG_CPU
	476	case CPU_DEAD:
8bb78442	477	case CPU_DEAD_FROZEN:
1da177e4 LT	478	unregister_cpu_online(cpu);
	479	break;
	480	#endif
	481	}
	482	return NOTIFY_OK;
	483	}
	484
8c78f307	485	static struct notifier_block __cpuinitdata sysfs_cpu_nb = {
1da177e4 LT	486	.notifier_call = sysfs_cpu_notify,
	487	};
	488
0344c6c5 CK	489	static DEFINE_MUTEX(cpu_mutex);
	490
	491	int cpu_add_sysdev_attr(struct sysdev_attribute *attr)
	492	{
	493	int cpu;
	494
	495	mutex_lock(&cpu_mutex);
	496
	497	for_each_possible_cpu(cpu) {
	498	sysdev_create_file(get_cpu_sysdev(cpu), attr);
	499	}
	500
	501	mutex_unlock(&cpu_mutex);
	502	return 0;
	503	}
	504	EXPORT_SYMBOL_GPL(cpu_add_sysdev_attr);
	505
	506	int cpu_add_sysdev_attr_group(struct attribute_group *attrs)
	507	{
	508	int cpu;
	509	struct sys_device *sysdev;
6bcc4c01	510	int ret;
0344c6c5 CK	511
	512	mutex_lock(&cpu_mutex);
	513
	514	for_each_possible_cpu(cpu) {
	515	sysdev = get_cpu_sysdev(cpu);
6bcc4c01 OJ	516	ret = sysfs_create_group(&sysdev->kobj, attrs);
6bcc4c01 OJ	517	WARN_ON(ret != 0);
0344c6c5 CK	518	}
	519
	520	mutex_unlock(&cpu_mutex);
	521	return 0;
	522	}
	523	EXPORT_SYMBOL_GPL(cpu_add_sysdev_attr_group);
	524
	525
	526	void cpu_remove_sysdev_attr(struct sysdev_attribute *attr)
	527	{
	528	int cpu;
	529
	530	mutex_lock(&cpu_mutex);
	531
	532	for_each_possible_cpu(cpu) {
	533	sysdev_remove_file(get_cpu_sysdev(cpu), attr);
	534	}
	535
	536	mutex_unlock(&cpu_mutex);
	537	}
	538	EXPORT_SYMBOL_GPL(cpu_remove_sysdev_attr);
	539
	540	void cpu_remove_sysdev_attr_group(struct attribute_group *attrs)
	541	{
	542	int cpu;
	543	struct sys_device *sysdev;
	544
	545	mutex_lock(&cpu_mutex);
	546
	547	for_each_possible_cpu(cpu) {
	548	sysdev = get_cpu_sysdev(cpu);
	549	sysfs_remove_group(&sysdev->kobj, attrs);
	550	}
	551
	552	mutex_unlock(&cpu_mutex);
	553	}
	554	EXPORT_SYMBOL_GPL(cpu_remove_sysdev_attr_group);
	555
	556
1da177e4 LT	557	/* NUMA stuff */
	558
	559	#ifdef CONFIG_NUMA
1da177e4 LT	560	static void register_nodes(void)
	561	{
	562	int i;
	563
0fc44159 YG	564	for (i = 0; i < MAX_NUMNODES; i++)
0fc44159 YG	565	register_one_node(i);
1da177e4	566	}
953039c8 JK	567
	568	int sysfs_add_device_to_node(struct sys_device *dev, int nid)
	569	{
	570	struct node *node = &node_devices[nid];
	571	return sysfs_create_link(&node->sysdev.kobj, &dev->kobj,
	572	kobject_name(&dev->kobj));
	573	}
12654f77	574	EXPORT_SYMBOL_GPL(sysfs_add_device_to_node);
953039c8 JK	575
	576	void sysfs_remove_device_from_node(struct sys_device *dev, int nid)
	577	{
	578	struct node *node = &node_devices[nid];
	579	sysfs_remove_link(&node->sysdev.kobj, kobject_name(&dev->kobj));
	580	}
12654f77	581	EXPORT_SYMBOL_GPL(sysfs_remove_device_from_node);
953039c8	582
1da177e4 LT	583	#else
	584	static void register_nodes(void)
	585	{
	586	return;
	587	}
953039c8	588
1da177e4 LT	589	#endif
	590
	591	/* Only valid if CPU is present. */
00bf6e90 SR	592	static ssize_t show_physical_id(struct sys_device *dev,
00bf6e90 SR	593	struct sysdev_attribute attr, char buf)
1da177e4 LT	594	{
	595	struct cpu *cpu = container_of(dev, struct cpu, sysdev);
	596
	597	return sprintf(buf, "%d\n", get_hard_smp_processor_id(cpu->sysdev.id));
	598	}
	599	static SYSDEV_ATTR(physical_id, 0444, show_physical_id, NULL);
	600
	601	static int __init topology_init(void)
	602	{
	603	int cpu;
1da177e4 LT	604
1da177e4 LT	605	register_nodes();
1da177e4 LT	606	register_cpu_notifier(&sysfs_cpu_nb);
1da177e4 LT	607
0e551954	608	for_each_possible_cpu(cpu) {
1da177e4 LT	609	struct cpu *c = &per_cpu(cpu_devices, cpu);
1da177e4 LT	610
1da177e4 LT	611	/*
	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
	616	* for hotplugging.
	617	*/
72486f1f SS	618	if (ppc_md.cpu_die)
72486f1f SS	619	c->hotpluggable = 1;
1da177e4	620
72486f1f	621	if (cpu_online(cpu) \|\| c->hotpluggable) {
76b67ed9	622	register_cpu(c, cpu);
1da177e4 LT	623
	624	sysdev_create_file(&c->sysdev, &attr_physical_id);
	625	}
	626
	627	if (cpu_online(cpu))
	628	register_cpu_online(cpu);
	629	}
	630
	631	return 0;
	632	}
e9e77ce8	633	subsys_initcall(topology_init);