[deliverable/linux.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 <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(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;
	long snooze;

	ret = sscanf(buf, "%ld", &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, "%ld\n", per_cpu(smt_snooze_delay, cpu->sysdev.id));
}

static SYSDEV_ATTR(smt_snooze_delay, 0644, show_smt_snooze_delay,
		   store_smt_snooze_delay);

static int __init setup_smt_snooze_delay(char *str)
{
	unsigned int cpu;
	long snooze;

	if (!cpu_has_feature(CPU_FTR_SMT))
		return 1;

	snooze = simple_strtol(str, NULL, 10);
	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);
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>
a6dbf93a	20	#include <asm/pmc.h>
1da177e4	21
93197a36 NL	22	#include "cacheinfo.h"
93197a36 NL	23
b950bdd0 BH	24	#ifdef CONFIG_PPC64
	25	#include <asm/paca.h>
	26	#include <asm/lppaca.h>
	27	#endif
	28
1da177e4 LT	29	static DEFINE_PER_CPU(struct cpu, cpu_devices);
1da177e4 LT	30
b950bdd0 BH	31	/*
	32	* SMT snooze delay stuff, 64-bit only for now
	33	*/
	34
	35	#ifdef CONFIG_PPC64
1da177e4	36
0ddd3e7d	37	/* Time in microseconds we delay before sleeping in the idle loop */
b878dc00	38	DEFINE_PER_CPU(long, smt_snooze_delay) = { 100 };
1da177e4	39
4a0b2b4d AK	40	static ssize_t store_smt_snooze_delay(struct sys_device *dev,
	41	struct sysdev_attribute *attr,
	42	const char *buf,
1da177e4 LT	43	size_t count)
	44	{
	45	struct cpu *cpu = container_of(dev, struct cpu, sysdev);
	46	ssize_t ret;
b878dc00	47	long snooze;
1da177e4	48
b878dc00	49	ret = sscanf(buf, "%ld", &snooze);
1da177e4 LT	50	if (ret != 1)
	51	return -EINVAL;
	52
	53	per_cpu(smt_snooze_delay, cpu->sysdev.id) = snooze;
	54
	55	return count;
	56	}
	57
4a0b2b4d AK	58	static ssize_t show_smt_snooze_delay(struct sys_device *dev,
	59	struct sysdev_attribute *attr,
	60	char *buf)
1da177e4 LT	61	{
	62	struct cpu *cpu = container_of(dev, struct cpu, sysdev);
	63
b878dc00	64	return sprintf(buf, "%ld\n", per_cpu(smt_snooze_delay, cpu->sysdev.id));
1da177e4 LT	65	}
	66
	67	static SYSDEV_ATTR(smt_snooze_delay, 0644, show_smt_snooze_delay,
	68	store_smt_snooze_delay);
	69
1da177e4 LT	70	static int __init setup_smt_snooze_delay(char *str)
	71	{
	72	unsigned int cpu;
b878dc00	73	long snooze;
1da177e4 LT	74
	75	if (!cpu_has_feature(CPU_FTR_SMT))
	76	return 1;
	77
b878dc00 AB	78	snooze = simple_strtol(str, NULL, 10);
	79	for_each_possible_cpu(cpu)
	80	per_cpu(smt_snooze_delay, cpu) = snooze;
1da177e4 LT	81
	82	return 1;
	83	}
	84	__setup("smt-snooze-delay=", setup_smt_snooze_delay);
	85
b950bdd0	86	#endif /* CONFIG_PPC64 */
180a3362	87
1da177e4 LT	88	/*
	89	* Enabling PMCs will slow partition context switch times so we only do
	90	* it the first time we write to the PMCs.
	91	*/
	92
	93	static DEFINE_PER_CPU(char, pmcs_enabled);
	94
b950bdd0	95	void ppc_enable_pmcs(void)
1da177e4	96	{
a6dbf93a PM	97	ppc_set_pmu_inuse(1);
a6dbf93a PM	98
1da177e4 LT	99	/* Only need to enable them once */
	100	if (__get_cpu_var(pmcs_enabled))
	101	return;
	102
	103	__get_cpu_var(pmcs_enabled) = 1;
	104
180a3362 ME	105	if (ppc_md.enable_pmcs)
180a3362 ME	106	ppc_md.enable_pmcs();
1da177e4	107	}
b950bdd0	108	EXPORT_SYMBOL(ppc_enable_pmcs);
1da177e4	109
1da177e4	110	#define SYSFS_PMCSETUP(NAME, ADDRESS) \
9a371934	111	static void read_##NAME(void *val) \
1da177e4	112	{ \
ec78c8ac	113	(unsigned long )val = mfspr(ADDRESS); \
1da177e4	114	} \
ec78c8ac	115	static void write_##NAME(void *val) \
1da177e4	116	{ \
b950bdd0	117	ppc_enable_pmcs(); \
9a371934	118	mtspr(ADDRESS, (unsigned long )val); \
1da177e4	119	} \
4a0b2b4d AK	120	static ssize_t show_##NAME(struct sys_device *dev, \
	121	struct sysdev_attribute *attr, \
	122	char *buf) \
1da177e4 LT	123	{ \
1da177e4 LT	124	struct cpu *cpu = container_of(dev, struct cpu, sysdev); \
9a371934 RR	125	unsigned long val; \
9a371934 RR	126	smp_call_function_single(cpu->sysdev.id, read_##NAME, &val, 1); \
1da177e4 LT	127	return sprintf(buf, "%lx\n", val); \
1da177e4 LT	128	} \
3ff6eecc	129	static ssize_t __used \
4a0b2b4d AK	130	store_##NAME(struct sys_device dev, struct sysdev_attribute attr, \
4a0b2b4d AK	131	const char *buf, size_t count) \
1da177e4 LT	132	{ \
	133	struct cpu *cpu = container_of(dev, struct cpu, sysdev); \
	134	unsigned long val; \
	135	int ret = sscanf(buf, "%lx", &val); \
	136	if (ret != 1) \
	137	return -EINVAL; \
9a371934	138	smp_call_function_single(cpu->sysdev.id, write_##NAME, &val, 1); \
1da177e4 LT	139	return count; \
	140	}
	141
6529c13d OJ	142
	143	/* Let's define all possible registers, we'll only hook up the ones
	144	* that are implemented on the current processor
	145	*/
	146
33a7f122	147	#if defined(CONFIG_PPC64)
b950bdd0 BH	148	#define HAS_PPC_PMC_CLASSIC 1
	149	#define HAS_PPC_PMC_IBM 1
	150	#define HAS_PPC_PMC_PA6T 1
33a7f122	151	#elif defined(CONFIG_6xx)
b950bdd0 BH	152	#define HAS_PPC_PMC_CLASSIC 1
	153	#define HAS_PPC_PMC_IBM 1
	154	#define HAS_PPC_PMC_G4 1
	155	#endif
	156
	157
	158	#ifdef HAS_PPC_PMC_CLASSIC
1da177e4 LT	159	SYSFS_PMCSETUP(mmcr0, SPRN_MMCR0);
1da177e4 LT	160	SYSFS_PMCSETUP(mmcr1, SPRN_MMCR1);
1da177e4 LT	161	SYSFS_PMCSETUP(pmc1, SPRN_PMC1);
	162	SYSFS_PMCSETUP(pmc2, SPRN_PMC2);
	163	SYSFS_PMCSETUP(pmc3, SPRN_PMC3);
	164	SYSFS_PMCSETUP(pmc4, SPRN_PMC4);
	165	SYSFS_PMCSETUP(pmc5, SPRN_PMC5);
	166	SYSFS_PMCSETUP(pmc6, SPRN_PMC6);
b950bdd0 BH	167
	168	#ifdef HAS_PPC_PMC_G4
	169	SYSFS_PMCSETUP(mmcr2, SPRN_MMCR2);
	170	#endif
	171
	172	#ifdef CONFIG_PPC64
1da177e4 LT	173	SYSFS_PMCSETUP(pmc7, SPRN_PMC7);
1da177e4 LT	174	SYSFS_PMCSETUP(pmc8, SPRN_PMC8);
b950bdd0 BH	175
b950bdd0 BH	176	SYSFS_PMCSETUP(mmcra, SPRN_MMCRA);
1da177e4	177	SYSFS_PMCSETUP(purr, SPRN_PURR);
f050982a	178	SYSFS_PMCSETUP(spurr, SPRN_SPURR);
4c198557	179	SYSFS_PMCSETUP(dscr, SPRN_DSCR);
1da177e4	180
b950bdd0 BH	181	static SYSDEV_ATTR(mmcra, 0600, show_mmcra, store_mmcra);
	182	static SYSDEV_ATTR(spurr, 0600, show_spurr, NULL);
	183	static SYSDEV_ATTR(dscr, 0600, show_dscr, store_dscr);
	184	static SYSDEV_ATTR(purr, 0600, show_purr, store_purr);
	185	#endif /* CONFIG_PPC64 */
	186
	187	#ifdef HAS_PPC_PMC_PA6T
25fc530e OJ	188	SYSFS_PMCSETUP(pa6t_pmc0, SPRN_PA6T_PMC0);
	189	SYSFS_PMCSETUP(pa6t_pmc1, SPRN_PA6T_PMC1);
	190	SYSFS_PMCSETUP(pa6t_pmc2, SPRN_PA6T_PMC2);
	191	SYSFS_PMCSETUP(pa6t_pmc3, SPRN_PA6T_PMC3);
	192	SYSFS_PMCSETUP(pa6t_pmc4, SPRN_PA6T_PMC4);
	193	SYSFS_PMCSETUP(pa6t_pmc5, SPRN_PA6T_PMC5);
2e1957fd OJ	194	#ifdef CONFIG_DEBUG_KERNEL
	195	SYSFS_PMCSETUP(hid0, SPRN_HID0);
	196	SYSFS_PMCSETUP(hid1, SPRN_HID1);
	197	SYSFS_PMCSETUP(hid4, SPRN_HID4);
	198	SYSFS_PMCSETUP(hid5, SPRN_HID5);
	199	SYSFS_PMCSETUP(ima0, SPRN_PA6T_IMA0);
	200	SYSFS_PMCSETUP(ima1, SPRN_PA6T_IMA1);
	201	SYSFS_PMCSETUP(ima2, SPRN_PA6T_IMA2);
	202	SYSFS_PMCSETUP(ima3, SPRN_PA6T_IMA3);
	203	SYSFS_PMCSETUP(ima4, SPRN_PA6T_IMA4);
	204	SYSFS_PMCSETUP(ima5, SPRN_PA6T_IMA5);
	205	SYSFS_PMCSETUP(ima6, SPRN_PA6T_IMA6);
	206	SYSFS_PMCSETUP(ima7, SPRN_PA6T_IMA7);
	207	SYSFS_PMCSETUP(ima8, SPRN_PA6T_IMA8);
	208	SYSFS_PMCSETUP(ima9, SPRN_PA6T_IMA9);
	209	SYSFS_PMCSETUP(imaat, SPRN_PA6T_IMAAT);
	210	SYSFS_PMCSETUP(btcr, SPRN_PA6T_BTCR);
	211	SYSFS_PMCSETUP(pccr, SPRN_PA6T_PCCR);
	212	SYSFS_PMCSETUP(rpccr, SPRN_PA6T_RPCCR);
	213	SYSFS_PMCSETUP(der, SPRN_PA6T_DER);
	214	SYSFS_PMCSETUP(mer, SPRN_PA6T_MER);
	215	SYSFS_PMCSETUP(ber, SPRN_PA6T_BER);
	216	SYSFS_PMCSETUP(ier, SPRN_PA6T_IER);
	217	SYSFS_PMCSETUP(sier, SPRN_PA6T_SIER);
	218	SYSFS_PMCSETUP(siar, SPRN_PA6T_SIAR);
	219	SYSFS_PMCSETUP(tsr0, SPRN_PA6T_TSR0);
	220	SYSFS_PMCSETUP(tsr1, SPRN_PA6T_TSR1);
	221	SYSFS_PMCSETUP(tsr2, SPRN_PA6T_TSR2);
	222	SYSFS_PMCSETUP(tsr3, SPRN_PA6T_TSR3);
	223	#endif /* CONFIG_DEBUG_KERNEL */
b950bdd0	224	#endif /* HAS_PPC_PMC_PA6T */
6529c13d	225
b950bdd0	226	#ifdef HAS_PPC_PMC_IBM
6529c13d OJ	227	static struct sysdev_attribute ibm_common_attrs[] = {
	228	_SYSDEV_ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0),
	229	_SYSDEV_ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1),
	230	};
b950bdd0 BH	231	#endif /* HAS_PPC_PMC_G4 */
	232
	233	#ifdef HAS_PPC_PMC_G4
	234	static struct sysdev_attribute g4_common_attrs[] = {
	235	_SYSDEV_ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0),
	236	_SYSDEV_ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1),
	237	_SYSDEV_ATTR(mmcr2, 0600, show_mmcr2, store_mmcr2),
	238	};
	239	#endif /* HAS_PPC_PMC_G4 */
6529c13d	240
b950bdd0	241	static struct sysdev_attribute classic_pmc_attrs[] = {
6529c13d OJ	242	_SYSDEV_ATTR(pmc1, 0600, show_pmc1, store_pmc1),
	243	_SYSDEV_ATTR(pmc2, 0600, show_pmc2, store_pmc2),
	244	_SYSDEV_ATTR(pmc3, 0600, show_pmc3, store_pmc3),
	245	_SYSDEV_ATTR(pmc4, 0600, show_pmc4, store_pmc4),
	246	_SYSDEV_ATTR(pmc5, 0600, show_pmc5, store_pmc5),
	247	_SYSDEV_ATTR(pmc6, 0600, show_pmc6, store_pmc6),
b950bdd0	248	#ifdef CONFIG_PPC64
6529c13d OJ	249	_SYSDEV_ATTR(pmc7, 0600, show_pmc7, store_pmc7),
6529c13d OJ	250	_SYSDEV_ATTR(pmc8, 0600, show_pmc8, store_pmc8),
b950bdd0	251	#endif
6529c13d OJ	252	};
6529c13d OJ	253
b950bdd0	254	#ifdef HAS_PPC_PMC_PA6T
6529c13d OJ	255	static struct sysdev_attribute pa6t_attrs[] = {
	256	_SYSDEV_ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0),
	257	_SYSDEV_ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1),
	258	_SYSDEV_ATTR(pmc0, 0600, show_pa6t_pmc0, store_pa6t_pmc0),
	259	_SYSDEV_ATTR(pmc1, 0600, show_pa6t_pmc1, store_pa6t_pmc1),
	260	_SYSDEV_ATTR(pmc2, 0600, show_pa6t_pmc2, store_pa6t_pmc2),
	261	_SYSDEV_ATTR(pmc3, 0600, show_pa6t_pmc3, store_pa6t_pmc3),
	262	_SYSDEV_ATTR(pmc4, 0600, show_pa6t_pmc4, store_pa6t_pmc4),
	263	_SYSDEV_ATTR(pmc5, 0600, show_pa6t_pmc5, store_pa6t_pmc5),
2e1957fd OJ	264	#ifdef CONFIG_DEBUG_KERNEL
	265	_SYSDEV_ATTR(hid0, 0600, show_hid0, store_hid0),
	266	_SYSDEV_ATTR(hid1, 0600, show_hid1, store_hid1),
	267	_SYSDEV_ATTR(hid4, 0600, show_hid4, store_hid4),
	268	_SYSDEV_ATTR(hid5, 0600, show_hid5, store_hid5),
	269	_SYSDEV_ATTR(ima0, 0600, show_ima0, store_ima0),
	270	_SYSDEV_ATTR(ima1, 0600, show_ima1, store_ima1),
	271	_SYSDEV_ATTR(ima2, 0600, show_ima2, store_ima2),
	272	_SYSDEV_ATTR(ima3, 0600, show_ima3, store_ima3),
	273	_SYSDEV_ATTR(ima4, 0600, show_ima4, store_ima4),
	274	_SYSDEV_ATTR(ima5, 0600, show_ima5, store_ima5),
	275	_SYSDEV_ATTR(ima6, 0600, show_ima6, store_ima6),
	276	_SYSDEV_ATTR(ima7, 0600, show_ima7, store_ima7),
	277	_SYSDEV_ATTR(ima8, 0600, show_ima8, store_ima8),
	278	_SYSDEV_ATTR(ima9, 0600, show_ima9, store_ima9),
	279	_SYSDEV_ATTR(imaat, 0600, show_imaat, store_imaat),
	280	_SYSDEV_ATTR(btcr, 0600, show_btcr, store_btcr),
	281	_SYSDEV_ATTR(pccr, 0600, show_pccr, store_pccr),
	282	_SYSDEV_ATTR(rpccr, 0600, show_rpccr, store_rpccr),
	283	_SYSDEV_ATTR(der, 0600, show_der, store_der),
	284	_SYSDEV_ATTR(mer, 0600, show_mer, store_mer),
	285	_SYSDEV_ATTR(ber, 0600, show_ber, store_ber),
	286	_SYSDEV_ATTR(ier, 0600, show_ier, store_ier),
	287	_SYSDEV_ATTR(sier, 0600, show_sier, store_sier),
	288	_SYSDEV_ATTR(siar, 0600, show_siar, store_siar),
	289	_SYSDEV_ATTR(tsr0, 0600, show_tsr0, store_tsr0),
	290	_SYSDEV_ATTR(tsr1, 0600, show_tsr1, store_tsr1),
	291	_SYSDEV_ATTR(tsr2, 0600, show_tsr2, store_tsr2),
	292	_SYSDEV_ATTR(tsr3, 0600, show_tsr3, store_tsr3),
	293	#endif /* CONFIG_DEBUG_KERNEL */
6529c13d	294	};
b950bdd0 BH	295	#endif /* HAS_PPC_PMC_PA6T */
b950bdd0 BH	296	#endif /* HAS_PPC_PMC_CLASSIC */
6529c13d	297
9ba1984e	298	static void __cpuinit register_cpu_online(unsigned int cpu)
1da177e4 LT	299	{
	300	struct cpu *c = &per_cpu(cpu_devices, cpu);
	301	struct sys_device *s = &c->sysdev;
6529c13d OJ	302	struct sysdev_attribute attrs, pmc_attrs;
6529c13d OJ	303	int i, nattrs;
1da177e4	304
b950bdd0	305	#ifdef CONFIG_PPC64
ad5cb17f SR	306	if (!firmware_has_feature(FW_FEATURE_ISERIES) &&
ad5cb17f SR	307	cpu_has_feature(CPU_FTR_SMT))
1da177e4	308	sysdev_create_file(s, &attr_smt_snooze_delay);
b950bdd0	309	#endif
1da177e4 LT	310
1da177e4 LT	311	/* PMC stuff */
6529c13d	312	switch (cur_cpu_spec->pmc_type) {
b950bdd0	313	#ifdef HAS_PPC_PMC_IBM
6529c13d OJ	314	case PPC_PMC_IBM:
	315	attrs = ibm_common_attrs;
	316	nattrs = sizeof(ibm_common_attrs) / sizeof(struct sysdev_attribute);
b950bdd0	317	pmc_attrs = classic_pmc_attrs;
6529c13d	318	break;
b950bdd0 BH	319	#endif /* HAS_PPC_PMC_IBM */
	320	#ifdef HAS_PPC_PMC_G4
	321	case PPC_PMC_G4:
	322	attrs = g4_common_attrs;
	323	nattrs = sizeof(g4_common_attrs) / sizeof(struct sysdev_attribute);
	324	pmc_attrs = classic_pmc_attrs;
	325	break;
	326	#endif /* HAS_PPC_PMC_G4 */
	327	#ifdef HAS_PPC_PMC_PA6T
6529c13d OJ	328	case PPC_PMC_PA6T:
	329	/* PA Semi starts counting at PMC0 */
	330	attrs = pa6t_attrs;
	331	nattrs = sizeof(pa6t_attrs) / sizeof(struct sysdev_attribute);
	332	pmc_attrs = NULL;
	333	break;
b950bdd0	334	#endif /* HAS_PPC_PMC_PA6T */
6529c13d OJ	335	default:
	336	attrs = NULL;
	337	nattrs = 0;
	338	pmc_attrs = NULL;
	339	}
	340
	341	for (i = 0; i < nattrs; i++)
	342	sysdev_create_file(s, &attrs[i]);
1da177e4	343
6529c13d OJ	344	if (pmc_attrs)
	345	for (i = 0; i < cur_cpu_spec->num_pmcs; i++)
	346	sysdev_create_file(s, &pmc_attrs[i]);
1da177e4	347
b950bdd0	348	#ifdef CONFIG_PPC64
1da177e4 LT	349	if (cpu_has_feature(CPU_FTR_MMCRA))
	350	sysdev_create_file(s, &attr_mmcra);
	351
afd05423	352	if (cpu_has_feature(CPU_FTR_PURR))
1da177e4	353	sysdev_create_file(s, &attr_purr);
4c198557	354
f050982a AB	355	if (cpu_has_feature(CPU_FTR_SPURR))
	356	sysdev_create_file(s, &attr_spurr);
	357
4c198557 AB	358	if (cpu_has_feature(CPU_FTR_DSCR))
4c198557 AB	359	sysdev_create_file(s, &attr_dscr);
b950bdd0	360	#endif /* CONFIG_PPC64 */
124c27d3	361
93197a36	362	cacheinfo_cpu_online(cpu);
1da177e4 LT	363	}
	364
	365	#ifdef CONFIG_HOTPLUG_CPU
	366	static void unregister_cpu_online(unsigned int cpu)
	367	{
	368	struct cpu *c = &per_cpu(cpu_devices, cpu);
	369	struct sys_device *s = &c->sysdev;
6529c13d OJ	370	struct sysdev_attribute attrs, pmc_attrs;
6529c13d OJ	371	int i, nattrs;
1da177e4	372
72486f1f	373	BUG_ON(!c->hotpluggable);
1da177e4	374
a1e0eb10	375	#ifdef CONFIG_PPC64
ad5cb17f SR	376	if (!firmware_has_feature(FW_FEATURE_ISERIES) &&
ad5cb17f SR	377	cpu_has_feature(CPU_FTR_SMT))
1da177e4	378	sysdev_remove_file(s, &attr_smt_snooze_delay);
a1e0eb10	379	#endif
1da177e4 LT	380
1da177e4 LT	381	/* PMC stuff */
6529c13d	382	switch (cur_cpu_spec->pmc_type) {
b950bdd0	383	#ifdef HAS_PPC_PMC_IBM
6529c13d OJ	384	case PPC_PMC_IBM:
	385	attrs = ibm_common_attrs;
	386	nattrs = sizeof(ibm_common_attrs) / sizeof(struct sysdev_attribute);
b950bdd0 BH	387	pmc_attrs = classic_pmc_attrs;
	388	break;
	389	#endif /* HAS_PPC_PMC_IBM */
	390	#ifdef HAS_PPC_PMC_G4
	391	case PPC_PMC_G4:
	392	attrs = g4_common_attrs;
	393	nattrs = sizeof(g4_common_attrs) / sizeof(struct sysdev_attribute);
	394	pmc_attrs = classic_pmc_attrs;
6529c13d	395	break;
b950bdd0 BH	396	#endif /* HAS_PPC_PMC_G4 */
b950bdd0 BH	397	#ifdef HAS_PPC_PMC_PA6T
6529c13d OJ	398	case PPC_PMC_PA6T:
	399	/* PA Semi starts counting at PMC0 */
	400	attrs = pa6t_attrs;
	401	nattrs = sizeof(pa6t_attrs) / sizeof(struct sysdev_attribute);
	402	pmc_attrs = NULL;
	403	break;
b950bdd0	404	#endif /* HAS_PPC_PMC_PA6T */
6529c13d OJ	405	default:
	406	attrs = NULL;
	407	nattrs = 0;
	408	pmc_attrs = NULL;
	409	}
1da177e4	410
6529c13d OJ	411	for (i = 0; i < nattrs; i++)
	412	sysdev_remove_file(s, &attrs[i]);
	413
	414	if (pmc_attrs)
	415	for (i = 0; i < cur_cpu_spec->num_pmcs; i++)
	416	sysdev_remove_file(s, &pmc_attrs[i]);
1da177e4	417
b950bdd0	418	#ifdef CONFIG_PPC64
1da177e4 LT	419	if (cpu_has_feature(CPU_FTR_MMCRA))
	420	sysdev_remove_file(s, &attr_mmcra);
	421
afd05423	422	if (cpu_has_feature(CPU_FTR_PURR))
1da177e4	423	sysdev_remove_file(s, &attr_purr);
4c198557	424
f050982a AB	425	if (cpu_has_feature(CPU_FTR_SPURR))
	426	sysdev_remove_file(s, &attr_spurr);
	427
4c198557 AB	428	if (cpu_has_feature(CPU_FTR_DSCR))
4c198557 AB	429	sysdev_remove_file(s, &attr_dscr);
b950bdd0	430	#endif /* CONFIG_PPC64 */
124c27d3	431
93197a36	432	cacheinfo_cpu_offline(cpu);
1da177e4	433	}
12633e80 NF	434
	435	#ifdef CONFIG_ARCH_CPU_PROBE_RELEASE
	436	ssize_t arch_cpu_probe(const char *buf, size_t count)
	437	{
	438	if (ppc_md.cpu_probe)
	439	return ppc_md.cpu_probe(buf, count);
	440
	441	return -EINVAL;
	442	}
	443
	444	ssize_t arch_cpu_release(const char *buf, size_t count)
	445	{
	446	if (ppc_md.cpu_release)
	447	return ppc_md.cpu_release(buf, count);
	448
	449	return -EINVAL;
	450	}
	451	#endif /* CONFIG_ARCH_CPU_PROBE_RELEASE */
	452
1da177e4 LT	453	#endif /* CONFIG_HOTPLUG_CPU */
1da177e4 LT	454
8c78f307	455	static int __cpuinit sysfs_cpu_notify(struct notifier_block *self,
1da177e4 LT	456	unsigned long action, void *hcpu)
	457	{
	458	unsigned int cpu = (unsigned int)(long)hcpu;
	459
	460	switch (action) {
	461	case CPU_ONLINE:
8bb78442	462	case CPU_ONLINE_FROZEN:
1da177e4 LT	463	register_cpu_online(cpu);
	464	break;
	465	#ifdef CONFIG_HOTPLUG_CPU
	466	case CPU_DEAD:
8bb78442	467	case CPU_DEAD_FROZEN:
1da177e4 LT	468	unregister_cpu_online(cpu);
	469	break;
	470	#endif
	471	}
	472	return NOTIFY_OK;
	473	}
	474
8c78f307	475	static struct notifier_block __cpuinitdata sysfs_cpu_nb = {
1da177e4 LT	476	.notifier_call = sysfs_cpu_notify,
	477	};
	478
0344c6c5 CK	479	static DEFINE_MUTEX(cpu_mutex);
	480
	481	int cpu_add_sysdev_attr(struct sysdev_attribute *attr)
	482	{
	483	int cpu;
	484
	485	mutex_lock(&cpu_mutex);
	486
	487	for_each_possible_cpu(cpu) {
	488	sysdev_create_file(get_cpu_sysdev(cpu), attr);
	489	}
	490
	491	mutex_unlock(&cpu_mutex);
	492	return 0;
	493	}
	494	EXPORT_SYMBOL_GPL(cpu_add_sysdev_attr);
	495
	496	int cpu_add_sysdev_attr_group(struct attribute_group *attrs)
	497	{
	498	int cpu;
	499	struct sys_device *sysdev;
6bcc4c01	500	int ret;
0344c6c5 CK	501
	502	mutex_lock(&cpu_mutex);
	503
	504	for_each_possible_cpu(cpu) {
	505	sysdev = get_cpu_sysdev(cpu);
6bcc4c01 OJ	506	ret = sysfs_create_group(&sysdev->kobj, attrs);
6bcc4c01 OJ	507	WARN_ON(ret != 0);
0344c6c5 CK	508	}
	509
	510	mutex_unlock(&cpu_mutex);
	511	return 0;
	512	}
	513	EXPORT_SYMBOL_GPL(cpu_add_sysdev_attr_group);
	514
	515
	516	void cpu_remove_sysdev_attr(struct sysdev_attribute *attr)
	517	{
	518	int cpu;
	519
	520	mutex_lock(&cpu_mutex);
	521
	522	for_each_possible_cpu(cpu) {
	523	sysdev_remove_file(get_cpu_sysdev(cpu), attr);
	524	}
	525
	526	mutex_unlock(&cpu_mutex);
	527	}
	528	EXPORT_SYMBOL_GPL(cpu_remove_sysdev_attr);
	529
	530	void cpu_remove_sysdev_attr_group(struct attribute_group *attrs)
	531	{
	532	int cpu;
	533	struct sys_device *sysdev;
	534
	535	mutex_lock(&cpu_mutex);
	536
	537	for_each_possible_cpu(cpu) {
	538	sysdev = get_cpu_sysdev(cpu);
	539	sysfs_remove_group(&sysdev->kobj, attrs);
	540	}
	541
	542	mutex_unlock(&cpu_mutex);
	543	}
	544	EXPORT_SYMBOL_GPL(cpu_remove_sysdev_attr_group);
	545
	546
1da177e4 LT	547	/* NUMA stuff */
	548
	549	#ifdef CONFIG_NUMA
1da177e4 LT	550	static void register_nodes(void)
	551	{
	552	int i;
	553
0fc44159 YG	554	for (i = 0; i < MAX_NUMNODES; i++)
0fc44159 YG	555	register_one_node(i);
1da177e4	556	}
953039c8 JK	557
	558	int sysfs_add_device_to_node(struct sys_device *dev, int nid)
	559	{
	560	struct node *node = &node_devices[nid];
	561	return sysfs_create_link(&node->sysdev.kobj, &dev->kobj,
	562	kobject_name(&dev->kobj));
	563	}
12654f77	564	EXPORT_SYMBOL_GPL(sysfs_add_device_to_node);
953039c8 JK	565
	566	void sysfs_remove_device_from_node(struct sys_device *dev, int nid)
	567	{
	568	struct node *node = &node_devices[nid];
	569	sysfs_remove_link(&node->sysdev.kobj, kobject_name(&dev->kobj));
	570	}
12654f77	571	EXPORT_SYMBOL_GPL(sysfs_remove_device_from_node);
953039c8	572
1da177e4 LT	573	#else
	574	static void register_nodes(void)
	575	{
	576	return;
	577	}
953039c8	578
1da177e4 LT	579	#endif
	580
	581	/* Only valid if CPU is present. */
00bf6e90 SR	582	static ssize_t show_physical_id(struct sys_device *dev,
00bf6e90 SR	583	struct sysdev_attribute attr, char buf)
1da177e4 LT	584	{
	585	struct cpu *cpu = container_of(dev, struct cpu, sysdev);
	586
	587	return sprintf(buf, "%d\n", get_hard_smp_processor_id(cpu->sysdev.id));
	588	}
	589	static SYSDEV_ATTR(physical_id, 0444, show_physical_id, NULL);
	590
	591	static int __init topology_init(void)
	592	{
	593	int cpu;
1da177e4 LT	594
1da177e4 LT	595	register_nodes();
1da177e4 LT	596	register_cpu_notifier(&sysfs_cpu_nb);
1da177e4 LT	597
0e551954	598	for_each_possible_cpu(cpu) {
1da177e4 LT	599	struct cpu *c = &per_cpu(cpu_devices, cpu);
1da177e4 LT	600
1da177e4 LT	601	/*
	602	* For now, we just see if the system supports making
	603	* the RTAS calls for CPU hotplug. But, there may be a
	604	* more comprehensive way to do this for an individual
	605	* CPU. For instance, the boot cpu might never be valid
	606	* for hotplugging.
	607	*/
72486f1f SS	608	if (ppc_md.cpu_die)
72486f1f SS	609	c->hotpluggable = 1;
1da177e4	610
72486f1f	611	if (cpu_online(cpu) \|\| c->hotpluggable) {
76b67ed9	612	register_cpu(c, cpu);
1da177e4 LT	613
	614	sysdev_create_file(&c->sysdev, &attr_physical_id);
	615	}
	616
	617	if (cpu_online(cpu))
	618	register_cpu_online(cpu);
	619	}
	620
	621	return 0;
	622	}
e9e77ce8	623	subsys_initcall(topology_init);