[GitHub/mt8127/android_kernel_alcatel_ttab.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) \
{ \
	*(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);
}
#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	137	#define SYSFS_PMCSETUP(NAME, ADDRESS) \
9a371934	138	static void read_##NAME(void *val) \
1da177e4	139	{ \
ec78c8ac	140	(unsigned long )val = mfspr(ADDRESS); \
1da177e4	141	} \
ec78c8ac	142	static void write_##NAME(void *val) \
1da177e4	143	{ \
b950bdd0	144	ppc_enable_pmcs(); \
9a371934	145	mtspr(ADDRESS, (unsigned long )val); \
1da177e4	146	} \
4a0b2b4d AK	147	static ssize_t show_##NAME(struct sys_device *dev, \
	148	struct sysdev_attribute *attr, \
	149	char *buf) \
1da177e4 LT	150	{ \
1da177e4 LT	151	struct cpu *cpu = container_of(dev, struct cpu, sysdev); \
9a371934 RR	152	unsigned long val; \
9a371934 RR	153	smp_call_function_single(cpu->sysdev.id, read_##NAME, &val, 1); \
1da177e4 LT	154	return sprintf(buf, "%lx\n", val); \
1da177e4 LT	155	} \
3ff6eecc	156	static ssize_t __used \
4a0b2b4d AK	157	store_##NAME(struct sys_device dev, struct sysdev_attribute attr, \
4a0b2b4d AK	158	const char *buf, size_t count) \
1da177e4 LT	159	{ \
	160	struct cpu *cpu = container_of(dev, struct cpu, sysdev); \
	161	unsigned long val; \
	162	int ret = sscanf(buf, "%lx", &val); \
	163	if (ret != 1) \
	164	return -EINVAL; \
9a371934	165	smp_call_function_single(cpu->sysdev.id, write_##NAME, &val, 1); \
1da177e4 LT	166	return count; \
	167	}
	168
6529c13d OJ	169
	170	/* Let's define all possible registers, we'll only hook up the ones
	171	* that are implemented on the current processor
	172	*/
	173
33a7f122	174	#if defined(CONFIG_PPC64)
b950bdd0 BH	175	#define HAS_PPC_PMC_CLASSIC 1
	176	#define HAS_PPC_PMC_IBM 1
	177	#define HAS_PPC_PMC_PA6T 1
33a7f122	178	#elif defined(CONFIG_6xx)
b950bdd0 BH	179	#define HAS_PPC_PMC_CLASSIC 1
	180	#define HAS_PPC_PMC_IBM 1
	181	#define HAS_PPC_PMC_G4 1
	182	#endif
	183
	184
	185	#ifdef HAS_PPC_PMC_CLASSIC
1da177e4 LT	186	SYSFS_PMCSETUP(mmcr0, SPRN_MMCR0);
1da177e4 LT	187	SYSFS_PMCSETUP(mmcr1, SPRN_MMCR1);
1da177e4 LT	188	SYSFS_PMCSETUP(pmc1, SPRN_PMC1);
	189	SYSFS_PMCSETUP(pmc2, SPRN_PMC2);
	190	SYSFS_PMCSETUP(pmc3, SPRN_PMC3);
	191	SYSFS_PMCSETUP(pmc4, SPRN_PMC4);
	192	SYSFS_PMCSETUP(pmc5, SPRN_PMC5);
	193	SYSFS_PMCSETUP(pmc6, SPRN_PMC6);
b950bdd0 BH	194
	195	#ifdef HAS_PPC_PMC_G4
	196	SYSFS_PMCSETUP(mmcr2, SPRN_MMCR2);
	197	#endif
	198
	199	#ifdef CONFIG_PPC64
1da177e4 LT	200	SYSFS_PMCSETUP(pmc7, SPRN_PMC7);
1da177e4 LT	201	SYSFS_PMCSETUP(pmc8, SPRN_PMC8);
b950bdd0 BH	202
b950bdd0 BH	203	SYSFS_PMCSETUP(mmcra, SPRN_MMCRA);
1da177e4	204	SYSFS_PMCSETUP(purr, SPRN_PURR);
f050982a	205	SYSFS_PMCSETUP(spurr, SPRN_SPURR);
4c198557	206	SYSFS_PMCSETUP(dscr, SPRN_DSCR);
1da177e4	207
b950bdd0 BH	208	static SYSDEV_ATTR(mmcra, 0600, show_mmcra, store_mmcra);
	209	static SYSDEV_ATTR(spurr, 0600, show_spurr, NULL);
	210	static SYSDEV_ATTR(dscr, 0600, show_dscr, store_dscr);
	211	static SYSDEV_ATTR(purr, 0600, show_purr, store_purr);
	212	#endif /* CONFIG_PPC64 */
	213
	214	#ifdef HAS_PPC_PMC_PA6T
25fc530e OJ	215	SYSFS_PMCSETUP(pa6t_pmc0, SPRN_PA6T_PMC0);
	216	SYSFS_PMCSETUP(pa6t_pmc1, SPRN_PA6T_PMC1);
	217	SYSFS_PMCSETUP(pa6t_pmc2, SPRN_PA6T_PMC2);
	218	SYSFS_PMCSETUP(pa6t_pmc3, SPRN_PA6T_PMC3);
	219	SYSFS_PMCSETUP(pa6t_pmc4, SPRN_PA6T_PMC4);
	220	SYSFS_PMCSETUP(pa6t_pmc5, SPRN_PA6T_PMC5);
2e1957fd OJ	221	#ifdef CONFIG_DEBUG_KERNEL
	222	SYSFS_PMCSETUP(hid0, SPRN_HID0);
	223	SYSFS_PMCSETUP(hid1, SPRN_HID1);
	224	SYSFS_PMCSETUP(hid4, SPRN_HID4);
	225	SYSFS_PMCSETUP(hid5, SPRN_HID5);
	226	SYSFS_PMCSETUP(ima0, SPRN_PA6T_IMA0);
	227	SYSFS_PMCSETUP(ima1, SPRN_PA6T_IMA1);
	228	SYSFS_PMCSETUP(ima2, SPRN_PA6T_IMA2);
	229	SYSFS_PMCSETUP(ima3, SPRN_PA6T_IMA3);
	230	SYSFS_PMCSETUP(ima4, SPRN_PA6T_IMA4);
	231	SYSFS_PMCSETUP(ima5, SPRN_PA6T_IMA5);
	232	SYSFS_PMCSETUP(ima6, SPRN_PA6T_IMA6);
	233	SYSFS_PMCSETUP(ima7, SPRN_PA6T_IMA7);
	234	SYSFS_PMCSETUP(ima8, SPRN_PA6T_IMA8);
	235	SYSFS_PMCSETUP(ima9, SPRN_PA6T_IMA9);
	236	SYSFS_PMCSETUP(imaat, SPRN_PA6T_IMAAT);
	237	SYSFS_PMCSETUP(btcr, SPRN_PA6T_BTCR);
	238	SYSFS_PMCSETUP(pccr, SPRN_PA6T_PCCR);
	239	SYSFS_PMCSETUP(rpccr, SPRN_PA6T_RPCCR);
	240	SYSFS_PMCSETUP(der, SPRN_PA6T_DER);
	241	SYSFS_PMCSETUP(mer, SPRN_PA6T_MER);
	242	SYSFS_PMCSETUP(ber, SPRN_PA6T_BER);
	243	SYSFS_PMCSETUP(ier, SPRN_PA6T_IER);
	244	SYSFS_PMCSETUP(sier, SPRN_PA6T_SIER);
	245	SYSFS_PMCSETUP(siar, SPRN_PA6T_SIAR);
	246	SYSFS_PMCSETUP(tsr0, SPRN_PA6T_TSR0);
	247	SYSFS_PMCSETUP(tsr1, SPRN_PA6T_TSR1);
	248	SYSFS_PMCSETUP(tsr2, SPRN_PA6T_TSR2);
	249	SYSFS_PMCSETUP(tsr3, SPRN_PA6T_TSR3);
	250	#endif /* CONFIG_DEBUG_KERNEL */
b950bdd0	251	#endif /* HAS_PPC_PMC_PA6T */
6529c13d	252
b950bdd0	253	#ifdef HAS_PPC_PMC_IBM
6529c13d OJ	254	static struct sysdev_attribute ibm_common_attrs[] = {
	255	_SYSDEV_ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0),
	256	_SYSDEV_ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1),
	257	};
b950bdd0 BH	258	#endif /* HAS_PPC_PMC_G4 */
	259
	260	#ifdef HAS_PPC_PMC_G4
	261	static struct sysdev_attribute g4_common_attrs[] = {
	262	_SYSDEV_ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0),
	263	_SYSDEV_ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1),
	264	_SYSDEV_ATTR(mmcr2, 0600, show_mmcr2, store_mmcr2),
	265	};
	266	#endif /* HAS_PPC_PMC_G4 */
6529c13d	267
b950bdd0	268	static struct sysdev_attribute classic_pmc_attrs[] = {
6529c13d OJ	269	_SYSDEV_ATTR(pmc1, 0600, show_pmc1, store_pmc1),
	270	_SYSDEV_ATTR(pmc2, 0600, show_pmc2, store_pmc2),
	271	_SYSDEV_ATTR(pmc3, 0600, show_pmc3, store_pmc3),
	272	_SYSDEV_ATTR(pmc4, 0600, show_pmc4, store_pmc4),
	273	_SYSDEV_ATTR(pmc5, 0600, show_pmc5, store_pmc5),
	274	_SYSDEV_ATTR(pmc6, 0600, show_pmc6, store_pmc6),
b950bdd0	275	#ifdef CONFIG_PPC64
6529c13d OJ	276	_SYSDEV_ATTR(pmc7, 0600, show_pmc7, store_pmc7),
6529c13d OJ	277	_SYSDEV_ATTR(pmc8, 0600, show_pmc8, store_pmc8),
b950bdd0	278	#endif
6529c13d OJ	279	};
6529c13d OJ	280
b950bdd0	281	#ifdef HAS_PPC_PMC_PA6T
6529c13d OJ	282	static struct sysdev_attribute pa6t_attrs[] = {
	283	_SYSDEV_ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0),
	284	_SYSDEV_ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1),
	285	_SYSDEV_ATTR(pmc0, 0600, show_pa6t_pmc0, store_pa6t_pmc0),
	286	_SYSDEV_ATTR(pmc1, 0600, show_pa6t_pmc1, store_pa6t_pmc1),
	287	_SYSDEV_ATTR(pmc2, 0600, show_pa6t_pmc2, store_pa6t_pmc2),
	288	_SYSDEV_ATTR(pmc3, 0600, show_pa6t_pmc3, store_pa6t_pmc3),
	289	_SYSDEV_ATTR(pmc4, 0600, show_pa6t_pmc4, store_pa6t_pmc4),
	290	_SYSDEV_ATTR(pmc5, 0600, show_pa6t_pmc5, store_pa6t_pmc5),
2e1957fd OJ	291	#ifdef CONFIG_DEBUG_KERNEL
	292	_SYSDEV_ATTR(hid0, 0600, show_hid0, store_hid0),
	293	_SYSDEV_ATTR(hid1, 0600, show_hid1, store_hid1),
	294	_SYSDEV_ATTR(hid4, 0600, show_hid4, store_hid4),
	295	_SYSDEV_ATTR(hid5, 0600, show_hid5, store_hid5),
	296	_SYSDEV_ATTR(ima0, 0600, show_ima0, store_ima0),
	297	_SYSDEV_ATTR(ima1, 0600, show_ima1, store_ima1),
	298	_SYSDEV_ATTR(ima2, 0600, show_ima2, store_ima2),
	299	_SYSDEV_ATTR(ima3, 0600, show_ima3, store_ima3),
	300	_SYSDEV_ATTR(ima4, 0600, show_ima4, store_ima4),
	301	_SYSDEV_ATTR(ima5, 0600, show_ima5, store_ima5),
	302	_SYSDEV_ATTR(ima6, 0600, show_ima6, store_ima6),
	303	_SYSDEV_ATTR(ima7, 0600, show_ima7, store_ima7),
	304	_SYSDEV_ATTR(ima8, 0600, show_ima8, store_ima8),
	305	_SYSDEV_ATTR(ima9, 0600, show_ima9, store_ima9),
	306	_SYSDEV_ATTR(imaat, 0600, show_imaat, store_imaat),
	307	_SYSDEV_ATTR(btcr, 0600, show_btcr, store_btcr),
	308	_SYSDEV_ATTR(pccr, 0600, show_pccr, store_pccr),
	309	_SYSDEV_ATTR(rpccr, 0600, show_rpccr, store_rpccr),
	310	_SYSDEV_ATTR(der, 0600, show_der, store_der),
	311	_SYSDEV_ATTR(mer, 0600, show_mer, store_mer),
	312	_SYSDEV_ATTR(ber, 0600, show_ber, store_ber),
	313	_SYSDEV_ATTR(ier, 0600, show_ier, store_ier),
	314	_SYSDEV_ATTR(sier, 0600, show_sier, store_sier),
	315	_SYSDEV_ATTR(siar, 0600, show_siar, store_siar),
	316	_SYSDEV_ATTR(tsr0, 0600, show_tsr0, store_tsr0),
	317	_SYSDEV_ATTR(tsr1, 0600, show_tsr1, store_tsr1),
	318	_SYSDEV_ATTR(tsr2, 0600, show_tsr2, store_tsr2),
	319	_SYSDEV_ATTR(tsr3, 0600, show_tsr3, store_tsr3),
	320	#endif /* CONFIG_DEBUG_KERNEL */
6529c13d	321	};
b950bdd0 BH	322	#endif /* HAS_PPC_PMC_PA6T */
b950bdd0 BH	323	#endif /* HAS_PPC_PMC_CLASSIC */
6529c13d	324
9ba1984e	325	static void __cpuinit register_cpu_online(unsigned int cpu)
1da177e4 LT	326	{
	327	struct cpu *c = &per_cpu(cpu_devices, cpu);
	328	struct sys_device *s = &c->sysdev;
6529c13d OJ	329	struct sysdev_attribute attrs, pmc_attrs;
6529c13d OJ	330	int i, nattrs;
1da177e4	331
b950bdd0	332	#ifdef CONFIG_PPC64
ad5cb17f SR	333	if (!firmware_has_feature(FW_FEATURE_ISERIES) &&
ad5cb17f SR	334	cpu_has_feature(CPU_FTR_SMT))
1da177e4	335	sysdev_create_file(s, &attr_smt_snooze_delay);
b950bdd0	336	#endif
1da177e4 LT	337
1da177e4 LT	338	/* PMC stuff */
6529c13d	339	switch (cur_cpu_spec->pmc_type) {
b950bdd0	340	#ifdef HAS_PPC_PMC_IBM
6529c13d OJ	341	case PPC_PMC_IBM:
	342	attrs = ibm_common_attrs;
	343	nattrs = sizeof(ibm_common_attrs) / sizeof(struct sysdev_attribute);
b950bdd0	344	pmc_attrs = classic_pmc_attrs;
6529c13d	345	break;
b950bdd0 BH	346	#endif /* HAS_PPC_PMC_IBM */
	347	#ifdef HAS_PPC_PMC_G4
	348	case PPC_PMC_G4:
	349	attrs = g4_common_attrs;
	350	nattrs = sizeof(g4_common_attrs) / sizeof(struct sysdev_attribute);
	351	pmc_attrs = classic_pmc_attrs;
	352	break;
	353	#endif /* HAS_PPC_PMC_G4 */
	354	#ifdef HAS_PPC_PMC_PA6T
6529c13d OJ	355	case PPC_PMC_PA6T:
	356	/* PA Semi starts counting at PMC0 */
	357	attrs = pa6t_attrs;
	358	nattrs = sizeof(pa6t_attrs) / sizeof(struct sysdev_attribute);
	359	pmc_attrs = NULL;
	360	break;
b950bdd0	361	#endif /* HAS_PPC_PMC_PA6T */
6529c13d OJ	362	default:
	363	attrs = NULL;
	364	nattrs = 0;
	365	pmc_attrs = NULL;
	366	}
	367
	368	for (i = 0; i < nattrs; i++)
	369	sysdev_create_file(s, &attrs[i]);
1da177e4	370
6529c13d OJ	371	if (pmc_attrs)
	372	for (i = 0; i < cur_cpu_spec->num_pmcs; i++)
	373	sysdev_create_file(s, &pmc_attrs[i]);
1da177e4	374
b950bdd0	375	#ifdef CONFIG_PPC64
1da177e4 LT	376	if (cpu_has_feature(CPU_FTR_MMCRA))
	377	sysdev_create_file(s, &attr_mmcra);
	378
afd05423	379	if (cpu_has_feature(CPU_FTR_PURR))
1da177e4	380	sysdev_create_file(s, &attr_purr);
4c198557	381
f050982a AB	382	if (cpu_has_feature(CPU_FTR_SPURR))
	383	sysdev_create_file(s, &attr_spurr);
	384
4c198557 AB	385	if (cpu_has_feature(CPU_FTR_DSCR))
4c198557 AB	386	sysdev_create_file(s, &attr_dscr);
b950bdd0	387	#endif /* CONFIG_PPC64 */
124c27d3	388
93197a36	389	cacheinfo_cpu_online(cpu);
1da177e4 LT	390	}
	391
	392	#ifdef CONFIG_HOTPLUG_CPU
	393	static void unregister_cpu_online(unsigned int cpu)
	394	{
	395	struct cpu *c = &per_cpu(cpu_devices, cpu);
	396	struct sys_device *s = &c->sysdev;
6529c13d OJ	397	struct sysdev_attribute attrs, pmc_attrs;
6529c13d OJ	398	int i, nattrs;
1da177e4	399
72486f1f	400	BUG_ON(!c->hotpluggable);
1da177e4	401
a1e0eb10	402	#ifdef CONFIG_PPC64
ad5cb17f SR	403	if (!firmware_has_feature(FW_FEATURE_ISERIES) &&
ad5cb17f SR	404	cpu_has_feature(CPU_FTR_SMT))
1da177e4	405	sysdev_remove_file(s, &attr_smt_snooze_delay);
a1e0eb10	406	#endif
1da177e4 LT	407
1da177e4 LT	408	/* PMC stuff */
6529c13d	409	switch (cur_cpu_spec->pmc_type) {
b950bdd0	410	#ifdef HAS_PPC_PMC_IBM
6529c13d OJ	411	case PPC_PMC_IBM:
	412	attrs = ibm_common_attrs;
	413	nattrs = sizeof(ibm_common_attrs) / sizeof(struct sysdev_attribute);
b950bdd0 BH	414	pmc_attrs = classic_pmc_attrs;
	415	break;
	416	#endif /* HAS_PPC_PMC_IBM */
	417	#ifdef HAS_PPC_PMC_G4
	418	case PPC_PMC_G4:
	419	attrs = g4_common_attrs;
	420	nattrs = sizeof(g4_common_attrs) / sizeof(struct sysdev_attribute);
	421	pmc_attrs = classic_pmc_attrs;
6529c13d	422	break;
b950bdd0 BH	423	#endif /* HAS_PPC_PMC_G4 */
b950bdd0 BH	424	#ifdef HAS_PPC_PMC_PA6T
6529c13d OJ	425	case PPC_PMC_PA6T:
	426	/* PA Semi starts counting at PMC0 */
	427	attrs = pa6t_attrs;
	428	nattrs = sizeof(pa6t_attrs) / sizeof(struct sysdev_attribute);
	429	pmc_attrs = NULL;
	430	break;
b950bdd0	431	#endif /* HAS_PPC_PMC_PA6T */
6529c13d OJ	432	default:
	433	attrs = NULL;
	434	nattrs = 0;
	435	pmc_attrs = NULL;
	436	}
1da177e4	437
6529c13d OJ	438	for (i = 0; i < nattrs; i++)
	439	sysdev_remove_file(s, &attrs[i]);
	440
	441	if (pmc_attrs)
	442	for (i = 0; i < cur_cpu_spec->num_pmcs; i++)
	443	sysdev_remove_file(s, &pmc_attrs[i]);
1da177e4	444
b950bdd0	445	#ifdef CONFIG_PPC64
1da177e4 LT	446	if (cpu_has_feature(CPU_FTR_MMCRA))
	447	sysdev_remove_file(s, &attr_mmcra);
	448
afd05423	449	if (cpu_has_feature(CPU_FTR_PURR))
1da177e4	450	sysdev_remove_file(s, &attr_purr);
4c198557	451
f050982a AB	452	if (cpu_has_feature(CPU_FTR_SPURR))
	453	sysdev_remove_file(s, &attr_spurr);
	454
4c198557 AB	455	if (cpu_has_feature(CPU_FTR_DSCR))
4c198557 AB	456	sysdev_remove_file(s, &attr_dscr);
b950bdd0	457	#endif /* CONFIG_PPC64 */
124c27d3	458
93197a36	459	cacheinfo_cpu_offline(cpu);
1da177e4 LT	460	}
	461	#endif /* CONFIG_HOTPLUG_CPU */
	462
8c78f307	463	static int __cpuinit sysfs_cpu_notify(struct notifier_block *self,
1da177e4 LT	464	unsigned long action, void *hcpu)
	465	{
	466	unsigned int cpu = (unsigned int)(long)hcpu;
	467
	468	switch (action) {
	469	case CPU_ONLINE:
8bb78442	470	case CPU_ONLINE_FROZEN:
1da177e4 LT	471	register_cpu_online(cpu);
	472	break;
	473	#ifdef CONFIG_HOTPLUG_CPU
	474	case CPU_DEAD:
8bb78442	475	case CPU_DEAD_FROZEN:
1da177e4 LT	476	unregister_cpu_online(cpu);
	477	break;
	478	#endif
	479	}
	480	return NOTIFY_OK;
	481	}
	482
8c78f307	483	static struct notifier_block __cpuinitdata sysfs_cpu_nb = {
1da177e4 LT	484	.notifier_call = sysfs_cpu_notify,
	485	};
	486
0344c6c5 CK	487	static DEFINE_MUTEX(cpu_mutex);
	488
	489	int cpu_add_sysdev_attr(struct sysdev_attribute *attr)
	490	{
	491	int cpu;
	492
	493	mutex_lock(&cpu_mutex);
	494
	495	for_each_possible_cpu(cpu) {
	496	sysdev_create_file(get_cpu_sysdev(cpu), attr);
	497	}
	498
	499	mutex_unlock(&cpu_mutex);
	500	return 0;
	501	}
	502	EXPORT_SYMBOL_GPL(cpu_add_sysdev_attr);
	503
	504	int cpu_add_sysdev_attr_group(struct attribute_group *attrs)
	505	{
	506	int cpu;
	507	struct sys_device *sysdev;
6bcc4c01	508	int ret;
0344c6c5 CK	509
	510	mutex_lock(&cpu_mutex);
	511
	512	for_each_possible_cpu(cpu) {
	513	sysdev = get_cpu_sysdev(cpu);
6bcc4c01 OJ	514	ret = sysfs_create_group(&sysdev->kobj, attrs);
6bcc4c01 OJ	515	WARN_ON(ret != 0);
0344c6c5 CK	516	}
	517
	518	mutex_unlock(&cpu_mutex);
	519	return 0;
	520	}
	521	EXPORT_SYMBOL_GPL(cpu_add_sysdev_attr_group);
	522
	523
	524	void cpu_remove_sysdev_attr(struct sysdev_attribute *attr)
	525	{
	526	int cpu;
	527
	528	mutex_lock(&cpu_mutex);
	529
	530	for_each_possible_cpu(cpu) {
	531	sysdev_remove_file(get_cpu_sysdev(cpu), attr);
	532	}
	533
	534	mutex_unlock(&cpu_mutex);
	535	}
	536	EXPORT_SYMBOL_GPL(cpu_remove_sysdev_attr);
	537
	538	void cpu_remove_sysdev_attr_group(struct attribute_group *attrs)
	539	{
	540	int cpu;
	541	struct sys_device *sysdev;
	542
	543	mutex_lock(&cpu_mutex);
	544
	545	for_each_possible_cpu(cpu) {
	546	sysdev = get_cpu_sysdev(cpu);
	547	sysfs_remove_group(&sysdev->kobj, attrs);
	548	}
	549
	550	mutex_unlock(&cpu_mutex);
	551	}
	552	EXPORT_SYMBOL_GPL(cpu_remove_sysdev_attr_group);
	553
	554
1da177e4 LT	555	/* NUMA stuff */
	556
	557	#ifdef CONFIG_NUMA
1da177e4 LT	558	static void register_nodes(void)
	559	{
	560	int i;
	561
0fc44159 YG	562	for (i = 0; i < MAX_NUMNODES; i++)
0fc44159 YG	563	register_one_node(i);
1da177e4	564	}
953039c8 JK	565
	566	int sysfs_add_device_to_node(struct sys_device *dev, int nid)
	567	{
	568	struct node *node = &node_devices[nid];
	569	return sysfs_create_link(&node->sysdev.kobj, &dev->kobj,
	570	kobject_name(&dev->kobj));
	571	}
12654f77	572	EXPORT_SYMBOL_GPL(sysfs_add_device_to_node);
953039c8 JK	573
	574	void sysfs_remove_device_from_node(struct sys_device *dev, int nid)
	575	{
	576	struct node *node = &node_devices[nid];
	577	sysfs_remove_link(&node->sysdev.kobj, kobject_name(&dev->kobj));
	578	}
12654f77	579	EXPORT_SYMBOL_GPL(sysfs_remove_device_from_node);
953039c8	580
1da177e4 LT	581	#else
	582	static void register_nodes(void)
	583	{
	584	return;
	585	}
953039c8	586
1da177e4 LT	587	#endif
	588
	589	/* Only valid if CPU is present. */
00bf6e90 SR	590	static ssize_t show_physical_id(struct sys_device *dev,
00bf6e90 SR	591	struct sysdev_attribute attr, char buf)
1da177e4 LT	592	{
	593	struct cpu *cpu = container_of(dev, struct cpu, sysdev);
	594
	595	return sprintf(buf, "%d\n", get_hard_smp_processor_id(cpu->sysdev.id));
	596	}
	597	static SYSDEV_ATTR(physical_id, 0444, show_physical_id, NULL);
	598
	599	static int __init topology_init(void)
	600	{
	601	int cpu;
1da177e4 LT	602
1da177e4 LT	603	register_nodes();
1da177e4 LT	604	register_cpu_notifier(&sysfs_cpu_nb);
1da177e4 LT	605
0e551954	606	for_each_possible_cpu(cpu) {
1da177e4 LT	607	struct cpu *c = &per_cpu(cpu_devices, cpu);
1da177e4 LT	608
1da177e4 LT	609	/*
	610	* For now, we just see if the system supports making
	611	* the RTAS calls for CPU hotplug. But, there may be a
	612	* more comprehensive way to do this for an individual
	613	* CPU. For instance, the boot cpu might never be valid
	614	* for hotplugging.
	615	*/
72486f1f SS	616	if (ppc_md.cpu_die)
72486f1f SS	617	c->hotpluggable = 1;
1da177e4	618
72486f1f	619	if (cpu_online(cpu) \|\| c->hotpluggable) {
76b67ed9	620	register_cpu(c, cpu);
1da177e4 LT	621
	622	sysdev_create_file(&c->sysdev, &attr_physical_id);
	623	}
	624
	625	if (cpu_online(cpu))
	626	register_cpu_online(cpu);
	627	}
	628
	629	return 0;
	630	}
e9e77ce8	631	subsys_initcall(topology_init);