[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 <asm/pmc.h>

#include "cacheinfo.h"

#ifdef CONFIG_PPC64
#include <asm/paca.h>
#include <asm/lppaca.h>
#endif

static DEFINE_PER_CPU(struct cpu, cpu_devices);

/*
 * SMT snooze delay stuff, 64-bit only for now
 */

#ifdef CONFIG_PPC64

/* Time in microseconds we delay before sleeping in the idle loop */
DEFINE_PER_CPU(unsigned long, smt_snooze_delay) = { 100 };

static ssize_t store_smt_snooze_delay(struct sys_device *dev,
				      struct sysdev_attribute *attr,
				      const char *buf,
				      size_t count)
{
	struct cpu *cpu = container_of(dev, struct cpu, sysdev);
	ssize_t ret;
	unsigned long snooze;

	ret = sscanf(buf, "%lu", &snooze);
	if (ret != 1)
		return -EINVAL;

	per_cpu(smt_snooze_delay, cpu->sysdev.id) = snooze;

	return count;
}

static ssize_t show_smt_snooze_delay(struct sys_device *dev,
				     struct sysdev_attribute *attr,
				     char *buf)
{
	struct cpu *cpu = container_of(dev, struct cpu, sysdev);

	return sprintf(buf, "%lu\n", per_cpu(smt_snooze_delay, cpu->sysdev.id));
}

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

/* Only parse OF options if the matching cmdline option was not specified */
static int smt_snooze_cmdline;

static int __init smt_setup(void)
{
	struct device_node *options;
	const unsigned int *val;
	unsigned int cpu;

	if (!cpu_has_feature(CPU_FTR_SMT))
		return -ENODEV;

	options = of_find_node_by_path("/options");
	if (!options)
		return -ENODEV;

	val = of_get_property(options, "ibm,smt-snooze-delay", NULL);
	if (!smt_snooze_cmdline && val) {
		for_each_possible_cpu(cpu)
			per_cpu(smt_snooze_delay, cpu) = *val;
	}

	of_node_put(options);
	return 0;
}
__initcall(smt_setup);

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

	if (!cpu_has_feature(CPU_FTR_SMT))
		return 1;

	smt_snooze_cmdline = 1;

	if (get_option(&str, &snooze)) {
		for_each_possible_cpu(cpu)
			per_cpu(smt_snooze_delay, cpu) = snooze;
	}

	return 1;
}
__setup("smt-snooze-delay=", setup_smt_snooze_delay);

#endif /* CONFIG_PPC64 */

/*
 * Enabling PMCs will slow partition context switch times so we only do
 * it the first time we write to the PMCs.
 */

static DEFINE_PER_CPU(char, pmcs_enabled);

void ppc_enable_pmcs(void)
{
	ppc_set_pmu_inuse(1);

	/* Only need to enable them once */
	if (__get_cpu_var(pmcs_enabled))
		return;

	__get_cpu_var(pmcs_enabled) = 1;

	if (ppc_md.enable_pmcs)
		ppc_md.enable_pmcs();
}
EXPORT_SYMBOL(ppc_enable_pmcs);

#define SYSFS_PMCSETUP(NAME, ADDRESS) \
static void read_##NAME(void *val) \
{ \
	*(unsigned long *)val = mfspr(ADDRESS);	\
} \
static void write_##NAME(void *val) \
{ \
	ppc_enable_pmcs(); \
	mtspr(ADDRESS, *(unsigned long *)val);	\
} \
static ssize_t show_##NAME(struct sys_device *dev, \
			struct sysdev_attribute *attr, \
			char *buf) \
{ \
	struct cpu *cpu = container_of(dev, struct cpu, sysdev); \
	unsigned long val; \
	smp_call_function_single(cpu->sysdev.id, read_##NAME, &val, 1);	\
	return sprintf(buf, "%lx\n", val); \
} \
static ssize_t __used \
	store_##NAME(struct sys_device *dev, struct sysdev_attribute *attr, \
			const char *buf, size_t count) \
{ \
	struct cpu *cpu = container_of(dev, struct cpu, sysdev); \
	unsigned long val; \
	int ret = sscanf(buf, "%lx", &val); \
	if (ret != 1) \
		return -EINVAL; \
	smp_call_function_single(cpu->sysdev.id, write_##NAME, &val, 1); \
	return count; \
}


/* Let's define all possible registers, we'll only hook up the ones
 * that are implemented on the current processor
 */

#if defined(CONFIG_PPC64)
#define HAS_PPC_PMC_CLASSIC	1
#define HAS_PPC_PMC_IBM		1
#define HAS_PPC_PMC_PA6T	1
#elif defined(CONFIG_6xx)
#define HAS_PPC_PMC_CLASSIC	1
#define HAS_PPC_PMC_IBM		1
#define HAS_PPC_PMC_G4		1
#endif


#ifdef HAS_PPC_PMC_CLASSIC
SYSFS_PMCSETUP(mmcr0, SPRN_MMCR0);
SYSFS_PMCSETUP(mmcr1, SPRN_MMCR1);
SYSFS_PMCSETUP(pmc1, SPRN_PMC1);
SYSFS_PMCSETUP(pmc2, SPRN_PMC2);
SYSFS_PMCSETUP(pmc3, SPRN_PMC3);
SYSFS_PMCSETUP(pmc4, SPRN_PMC4);
SYSFS_PMCSETUP(pmc5, SPRN_PMC5);
SYSFS_PMCSETUP(pmc6, SPRN_PMC6);

#ifdef HAS_PPC_PMC_G4
SYSFS_PMCSETUP(mmcr2, SPRN_MMCR2);
#endif

#ifdef CONFIG_PPC64
SYSFS_PMCSETUP(pmc7, SPRN_PMC7);
SYSFS_PMCSETUP(pmc8, SPRN_PMC8);

SYSFS_PMCSETUP(mmcra, SPRN_MMCRA);
SYSFS_PMCSETUP(purr, SPRN_PURR);
SYSFS_PMCSETUP(spurr, SPRN_SPURR);
SYSFS_PMCSETUP(dscr, SPRN_DSCR);

static SYSDEV_ATTR(mmcra, 0600, show_mmcra, store_mmcra);
static SYSDEV_ATTR(spurr, 0600, show_spurr, NULL);
static SYSDEV_ATTR(dscr, 0600, show_dscr, store_dscr);
static SYSDEV_ATTR(purr, 0600, show_purr, store_purr);
#endif /* CONFIG_PPC64 */

#ifdef HAS_PPC_PMC_PA6T
SYSFS_PMCSETUP(pa6t_pmc0, SPRN_PA6T_PMC0);
SYSFS_PMCSETUP(pa6t_pmc1, SPRN_PA6T_PMC1);
SYSFS_PMCSETUP(pa6t_pmc2, SPRN_PA6T_PMC2);
SYSFS_PMCSETUP(pa6t_pmc3, SPRN_PA6T_PMC3);
SYSFS_PMCSETUP(pa6t_pmc4, SPRN_PA6T_PMC4);
SYSFS_PMCSETUP(pa6t_pmc5, SPRN_PA6T_PMC5);
#ifdef CONFIG_DEBUG_KERNEL
SYSFS_PMCSETUP(hid0, SPRN_HID0);
SYSFS_PMCSETUP(hid1, SPRN_HID1);
SYSFS_PMCSETUP(hid4, SPRN_HID4);
SYSFS_PMCSETUP(hid5, SPRN_HID5);
SYSFS_PMCSETUP(ima0, SPRN_PA6T_IMA0);
SYSFS_PMCSETUP(ima1, SPRN_PA6T_IMA1);
SYSFS_PMCSETUP(ima2, SPRN_PA6T_IMA2);
SYSFS_PMCSETUP(ima3, SPRN_PA6T_IMA3);
SYSFS_PMCSETUP(ima4, SPRN_PA6T_IMA4);
SYSFS_PMCSETUP(ima5, SPRN_PA6T_IMA5);
SYSFS_PMCSETUP(ima6, SPRN_PA6T_IMA6);
SYSFS_PMCSETUP(ima7, SPRN_PA6T_IMA7);
SYSFS_PMCSETUP(ima8, SPRN_PA6T_IMA8);
SYSFS_PMCSETUP(ima9, SPRN_PA6T_IMA9);
SYSFS_PMCSETUP(imaat, SPRN_PA6T_IMAAT);
SYSFS_PMCSETUP(btcr, SPRN_PA6T_BTCR);
SYSFS_PMCSETUP(pccr, SPRN_PA6T_PCCR);
SYSFS_PMCSETUP(rpccr, SPRN_PA6T_RPCCR);
SYSFS_PMCSETUP(der, SPRN_PA6T_DER);
SYSFS_PMCSETUP(mer, SPRN_PA6T_MER);
SYSFS_PMCSETUP(ber, SPRN_PA6T_BER);
SYSFS_PMCSETUP(ier, SPRN_PA6T_IER);
SYSFS_PMCSETUP(sier, SPRN_PA6T_SIER);
SYSFS_PMCSETUP(siar, SPRN_PA6T_SIAR);
SYSFS_PMCSETUP(tsr0, SPRN_PA6T_TSR0);
SYSFS_PMCSETUP(tsr1, SPRN_PA6T_TSR1);
SYSFS_PMCSETUP(tsr2, SPRN_PA6T_TSR2);
SYSFS_PMCSETUP(tsr3, SPRN_PA6T_TSR3);
#endif /* CONFIG_DEBUG_KERNEL */
#endif /* HAS_PPC_PMC_PA6T */

#ifdef HAS_PPC_PMC_IBM
static struct sysdev_attribute ibm_common_attrs[] = {
	_SYSDEV_ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0),
	_SYSDEV_ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1),
};
#endif /* HAS_PPC_PMC_G4 */

#ifdef HAS_PPC_PMC_G4
static struct sysdev_attribute g4_common_attrs[] = {
	_SYSDEV_ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0),
	_SYSDEV_ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1),
	_SYSDEV_ATTR(mmcr2, 0600, show_mmcr2, store_mmcr2),
};
#endif /* HAS_PPC_PMC_G4 */

static struct sysdev_attribute classic_pmc_attrs[] = {
	_SYSDEV_ATTR(pmc1, 0600, show_pmc1, store_pmc1),
	_SYSDEV_ATTR(pmc2, 0600, show_pmc2, store_pmc2),
	_SYSDEV_ATTR(pmc3, 0600, show_pmc3, store_pmc3),
	_SYSDEV_ATTR(pmc4, 0600, show_pmc4, store_pmc4),
	_SYSDEV_ATTR(pmc5, 0600, show_pmc5, store_pmc5),
	_SYSDEV_ATTR(pmc6, 0600, show_pmc6, store_pmc6),
#ifdef CONFIG_PPC64
	_SYSDEV_ATTR(pmc7, 0600, show_pmc7, store_pmc7),
	_SYSDEV_ATTR(pmc8, 0600, show_pmc8, store_pmc8),
#endif
};

#ifdef HAS_PPC_PMC_PA6T
static struct sysdev_attribute pa6t_attrs[] = {
	_SYSDEV_ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0),
	_SYSDEV_ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1),
	_SYSDEV_ATTR(pmc0, 0600, show_pa6t_pmc0, store_pa6t_pmc0),
	_SYSDEV_ATTR(pmc1, 0600, show_pa6t_pmc1, store_pa6t_pmc1),
	_SYSDEV_ATTR(pmc2, 0600, show_pa6t_pmc2, store_pa6t_pmc2),
	_SYSDEV_ATTR(pmc3, 0600, show_pa6t_pmc3, store_pa6t_pmc3),
	_SYSDEV_ATTR(pmc4, 0600, show_pa6t_pmc4, store_pa6t_pmc4),
	_SYSDEV_ATTR(pmc5, 0600, show_pa6t_pmc5, store_pa6t_pmc5),
#ifdef CONFIG_DEBUG_KERNEL
	_SYSDEV_ATTR(hid0, 0600, show_hid0, store_hid0),
	_SYSDEV_ATTR(hid1, 0600, show_hid1, store_hid1),
	_SYSDEV_ATTR(hid4, 0600, show_hid4, store_hid4),
	_SYSDEV_ATTR(hid5, 0600, show_hid5, store_hid5),
	_SYSDEV_ATTR(ima0, 0600, show_ima0, store_ima0),
	_SYSDEV_ATTR(ima1, 0600, show_ima1, store_ima1),
	_SYSDEV_ATTR(ima2, 0600, show_ima2, store_ima2),
	_SYSDEV_ATTR(ima3, 0600, show_ima3, store_ima3),
	_SYSDEV_ATTR(ima4, 0600, show_ima4, store_ima4),
	_SYSDEV_ATTR(ima5, 0600, show_ima5, store_ima5),
	_SYSDEV_ATTR(ima6, 0600, show_ima6, store_ima6),
	_SYSDEV_ATTR(ima7, 0600, show_ima7, store_ima7),
	_SYSDEV_ATTR(ima8, 0600, show_ima8, store_ima8),
	_SYSDEV_ATTR(ima9, 0600, show_ima9, store_ima9),
	_SYSDEV_ATTR(imaat, 0600, show_imaat, store_imaat),
	_SYSDEV_ATTR(btcr, 0600, show_btcr, store_btcr),
	_SYSDEV_ATTR(pccr, 0600, show_pccr, store_pccr),
	_SYSDEV_ATTR(rpccr, 0600, show_rpccr, store_rpccr),
	_SYSDEV_ATTR(der, 0600, show_der, store_der),
	_SYSDEV_ATTR(mer, 0600, show_mer, store_mer),
	_SYSDEV_ATTR(ber, 0600, show_ber, store_ber),
	_SYSDEV_ATTR(ier, 0600, show_ier, store_ier),
	_SYSDEV_ATTR(sier, 0600, show_sier, store_sier),
	_SYSDEV_ATTR(siar, 0600, show_siar, store_siar),
	_SYSDEV_ATTR(tsr0, 0600, show_tsr0, store_tsr0),
	_SYSDEV_ATTR(tsr1, 0600, show_tsr1, store_tsr1),
	_SYSDEV_ATTR(tsr2, 0600, show_tsr2, store_tsr2),
	_SYSDEV_ATTR(tsr3, 0600, show_tsr3, store_tsr3),
#endif /* CONFIG_DEBUG_KERNEL */
};
#endif /* HAS_PPC_PMC_PA6T */
#endif /* HAS_PPC_PMC_CLASSIC */

static void __cpuinit register_cpu_online(unsigned int cpu)
{
	struct cpu *c = &per_cpu(cpu_devices, cpu);
	struct sys_device *s = &c->sysdev;
	struct sysdev_attribute *attrs, *pmc_attrs;
	int i, nattrs;

#ifdef CONFIG_PPC64
	if (!firmware_has_feature(FW_FEATURE_ISERIES) &&
			cpu_has_feature(CPU_FTR_SMT))
		sysdev_create_file(s, &attr_smt_snooze_delay);
#endif

	/* PMC stuff */
	switch (cur_cpu_spec->pmc_type) {
#ifdef HAS_PPC_PMC_IBM
	case PPC_PMC_IBM:
		attrs = ibm_common_attrs;
		nattrs = sizeof(ibm_common_attrs) / sizeof(struct sysdev_attribute);
		pmc_attrs = classic_pmc_attrs;
		break;
#endif /* HAS_PPC_PMC_IBM */
#ifdef HAS_PPC_PMC_G4
	case PPC_PMC_G4:
		attrs = g4_common_attrs;
		nattrs = sizeof(g4_common_attrs) / sizeof(struct sysdev_attribute);
		pmc_attrs = classic_pmc_attrs;
		break;
#endif /* HAS_PPC_PMC_G4 */
#ifdef HAS_PPC_PMC_PA6T
	case PPC_PMC_PA6T:
		/* PA Semi starts counting at PMC0 */
		attrs = pa6t_attrs;
		nattrs = sizeof(pa6t_attrs) / sizeof(struct sysdev_attribute);
		pmc_attrs = NULL;
		break;
#endif /* HAS_PPC_PMC_PA6T */
	default:
		attrs = NULL;
		nattrs = 0;
		pmc_attrs = NULL;
	}

	for (i = 0; i < nattrs; i++)
		sysdev_create_file(s, &attrs[i]);

	if (pmc_attrs)
		for (i = 0; i < cur_cpu_spec->num_pmcs; i++)
			sysdev_create_file(s, &pmc_attrs[i]);

#ifdef CONFIG_PPC64
	if (cpu_has_feature(CPU_FTR_MMCRA))
		sysdev_create_file(s, &attr_mmcra);

	if (cpu_has_feature(CPU_FTR_PURR))
		sysdev_create_file(s, &attr_purr);

	if (cpu_has_feature(CPU_FTR_SPURR))
		sysdev_create_file(s, &attr_spurr);

	if (cpu_has_feature(CPU_FTR_DSCR))
		sysdev_create_file(s, &attr_dscr);
#endif /* CONFIG_PPC64 */

	cacheinfo_cpu_online(cpu);
}

#ifdef CONFIG_HOTPLUG_CPU
static void unregister_cpu_online(unsigned int cpu)
{
	struct cpu *c = &per_cpu(cpu_devices, cpu);
	struct sys_device *s = &c->sysdev;
	struct sysdev_attribute *attrs, *pmc_attrs;
	int i, nattrs;

	BUG_ON(!c->hotpluggable);

#ifdef CONFIG_PPC64
	if (!firmware_has_feature(FW_FEATURE_ISERIES) &&
			cpu_has_feature(CPU_FTR_SMT))
		sysdev_remove_file(s, &attr_smt_snooze_delay);
#endif

	/* PMC stuff */
	switch (cur_cpu_spec->pmc_type) {
#ifdef HAS_PPC_PMC_IBM
	case PPC_PMC_IBM:
		attrs = ibm_common_attrs;
		nattrs = sizeof(ibm_common_attrs) / sizeof(struct sysdev_attribute);
		pmc_attrs = classic_pmc_attrs;
		break;
#endif /* HAS_PPC_PMC_IBM */
#ifdef HAS_PPC_PMC_G4
	case PPC_PMC_G4:
		attrs = g4_common_attrs;
		nattrs = sizeof(g4_common_attrs) / sizeof(struct sysdev_attribute);
		pmc_attrs = classic_pmc_attrs;
		break;
#endif /* HAS_PPC_PMC_G4 */
#ifdef HAS_PPC_PMC_PA6T
	case PPC_PMC_PA6T:
		/* PA Semi starts counting at PMC0 */
		attrs = pa6t_attrs;
		nattrs = sizeof(pa6t_attrs) / sizeof(struct sysdev_attribute);
		pmc_attrs = NULL;
		break;
#endif /* HAS_PPC_PMC_PA6T */
	default:
		attrs = NULL;
		nattrs = 0;
		pmc_attrs = NULL;
	}

	for (i = 0; i < nattrs; i++)
		sysdev_remove_file(s, &attrs[i]);

	if (pmc_attrs)
		for (i = 0; i < cur_cpu_spec->num_pmcs; i++)
			sysdev_remove_file(s, &pmc_attrs[i]);

#ifdef CONFIG_PPC64
	if (cpu_has_feature(CPU_FTR_MMCRA))
		sysdev_remove_file(s, &attr_mmcra);

	if (cpu_has_feature(CPU_FTR_PURR))
		sysdev_remove_file(s, &attr_purr);

	if (cpu_has_feature(CPU_FTR_SPURR))
		sysdev_remove_file(s, &attr_spurr);

	if (cpu_has_feature(CPU_FTR_DSCR))
		sysdev_remove_file(s, &attr_dscr);
#endif /* CONFIG_PPC64 */

	cacheinfo_cpu_offline(cpu);
}
#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 AB	37	/* Time in microseconds we delay before sleeping in the idle loop */
0ddd3e7d AB	38	DEFINE_PER_CPU(unsigned 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;
	47	unsigned long snooze;
	48
	49	ret = sscanf(buf, "%lu", &snooze);
	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
	64	return sprintf(buf, "%lu\n", per_cpu(smt_snooze_delay, cpu->sysdev.id));
	65	}
	66
	67	static SYSDEV_ATTR(smt_snooze_delay, 0644, show_smt_snooze_delay,
	68	store_smt_snooze_delay);
	69
	70	/* Only parse OF options if the matching cmdline option was not specified */
	71	static int smt_snooze_cmdline;
	72
	73	static int __init smt_setup(void)
	74	{
	75	struct device_node *options;
a7f67bdf	76	const unsigned int *val;
1da177e4 LT	77	unsigned int cpu;
	78
	79	if (!cpu_has_feature(CPU_FTR_SMT))
69ed3324	80	return -ENODEV;
1da177e4	81
8c8dc322	82	options = of_find_node_by_path("/options");
1da177e4	83	if (!options)
69ed3324	84	return -ENODEV;
1da177e4	85
e2eb6392	86	val = of_get_property(options, "ibm,smt-snooze-delay", NULL);
1da177e4	87	if (!smt_snooze_cmdline && val) {
0e551954	88	for_each_possible_cpu(cpu)
1da177e4 LT	89	per_cpu(smt_snooze_delay, cpu) = *val;
	90	}
	91
8c8dc322	92	of_node_put(options);
69ed3324	93	return 0;
1da177e4 LT	94	}
	95	__initcall(smt_setup);
	96
	97	static int __init setup_smt_snooze_delay(char *str)
	98	{
	99	unsigned int cpu;
	100	int snooze;
	101
	102	if (!cpu_has_feature(CPU_FTR_SMT))
	103	return 1;
	104
	105	smt_snooze_cmdline = 1;
	106
	107	if (get_option(&str, &snooze)) {
0e551954	108	for_each_possible_cpu(cpu)
1da177e4 LT	109	per_cpu(smt_snooze_delay, cpu) = snooze;
	110	}
	111
	112	return 1;
	113	}
	114	__setup("smt-snooze-delay=", setup_smt_snooze_delay);
	115
b950bdd0	116	#endif /* CONFIG_PPC64 */
180a3362	117
1da177e4 LT	118	/*
	119	* Enabling PMCs will slow partition context switch times so we only do
	120	* it the first time we write to the PMCs.
	121	*/
	122
	123	static DEFINE_PER_CPU(char, pmcs_enabled);
	124
b950bdd0	125	void ppc_enable_pmcs(void)
1da177e4	126	{
a6dbf93a PM	127	ppc_set_pmu_inuse(1);
a6dbf93a PM	128
1da177e4 LT	129	/* Only need to enable them once */
	130	if (__get_cpu_var(pmcs_enabled))
	131	return;
	132
	133	__get_cpu_var(pmcs_enabled) = 1;
	134
180a3362 ME	135	if (ppc_md.enable_pmcs)
180a3362 ME	136	ppc_md.enable_pmcs();
1da177e4	137	}
b950bdd0	138	EXPORT_SYMBOL(ppc_enable_pmcs);
1da177e4	139
1da177e4	140	#define SYSFS_PMCSETUP(NAME, ADDRESS) \
9a371934	141	static void read_##NAME(void *val) \
1da177e4	142	{ \
ec78c8ac	143	(unsigned long )val = mfspr(ADDRESS); \
1da177e4	144	} \
ec78c8ac	145	static void write_##NAME(void *val) \
1da177e4	146	{ \
b950bdd0	147	ppc_enable_pmcs(); \
9a371934	148	mtspr(ADDRESS, (unsigned long )val); \
1da177e4	149	} \
4a0b2b4d AK	150	static ssize_t show_##NAME(struct sys_device *dev, \
	151	struct sysdev_attribute *attr, \
	152	char *buf) \
1da177e4 LT	153	{ \
1da177e4 LT	154	struct cpu *cpu = container_of(dev, struct cpu, sysdev); \
9a371934 RR	155	unsigned long val; \
9a371934 RR	156	smp_call_function_single(cpu->sysdev.id, read_##NAME, &val, 1); \
1da177e4 LT	157	return sprintf(buf, "%lx\n", val); \
1da177e4 LT	158	} \
3ff6eecc	159	static ssize_t __used \
4a0b2b4d AK	160	store_##NAME(struct sys_device dev, struct sysdev_attribute attr, \
4a0b2b4d AK	161	const char *buf, size_t count) \
1da177e4 LT	162	{ \
	163	struct cpu *cpu = container_of(dev, struct cpu, sysdev); \
	164	unsigned long val; \
	165	int ret = sscanf(buf, "%lx", &val); \
	166	if (ret != 1) \
	167	return -EINVAL; \
9a371934	168	smp_call_function_single(cpu->sysdev.id, write_##NAME, &val, 1); \
1da177e4 LT	169	return count; \
	170	}
	171
6529c13d OJ	172
	173	/* Let's define all possible registers, we'll only hook up the ones
	174	* that are implemented on the current processor
	175	*/
	176
33a7f122	177	#if defined(CONFIG_PPC64)
b950bdd0 BH	178	#define HAS_PPC_PMC_CLASSIC 1
	179	#define HAS_PPC_PMC_IBM 1
	180	#define HAS_PPC_PMC_PA6T 1
33a7f122	181	#elif defined(CONFIG_6xx)
b950bdd0 BH	182	#define HAS_PPC_PMC_CLASSIC 1
	183	#define HAS_PPC_PMC_IBM 1
	184	#define HAS_PPC_PMC_G4 1
	185	#endif
	186
	187
	188	#ifdef HAS_PPC_PMC_CLASSIC
1da177e4 LT	189	SYSFS_PMCSETUP(mmcr0, SPRN_MMCR0);
1da177e4 LT	190	SYSFS_PMCSETUP(mmcr1, SPRN_MMCR1);
1da177e4 LT	191	SYSFS_PMCSETUP(pmc1, SPRN_PMC1);
	192	SYSFS_PMCSETUP(pmc2, SPRN_PMC2);
	193	SYSFS_PMCSETUP(pmc3, SPRN_PMC3);
	194	SYSFS_PMCSETUP(pmc4, SPRN_PMC4);
	195	SYSFS_PMCSETUP(pmc5, SPRN_PMC5);
	196	SYSFS_PMCSETUP(pmc6, SPRN_PMC6);
b950bdd0 BH	197
	198	#ifdef HAS_PPC_PMC_G4
	199	SYSFS_PMCSETUP(mmcr2, SPRN_MMCR2);
	200	#endif
	201
	202	#ifdef CONFIG_PPC64
1da177e4 LT	203	SYSFS_PMCSETUP(pmc7, SPRN_PMC7);
1da177e4 LT	204	SYSFS_PMCSETUP(pmc8, SPRN_PMC8);
b950bdd0 BH	205
b950bdd0 BH	206	SYSFS_PMCSETUP(mmcra, SPRN_MMCRA);
1da177e4	207	SYSFS_PMCSETUP(purr, SPRN_PURR);
f050982a	208	SYSFS_PMCSETUP(spurr, SPRN_SPURR);
4c198557	209	SYSFS_PMCSETUP(dscr, SPRN_DSCR);
1da177e4	210
b950bdd0 BH	211	static SYSDEV_ATTR(mmcra, 0600, show_mmcra, store_mmcra);
	212	static SYSDEV_ATTR(spurr, 0600, show_spurr, NULL);
	213	static SYSDEV_ATTR(dscr, 0600, show_dscr, store_dscr);
	214	static SYSDEV_ATTR(purr, 0600, show_purr, store_purr);
	215	#endif /* CONFIG_PPC64 */
	216
	217	#ifdef HAS_PPC_PMC_PA6T
25fc530e OJ	218	SYSFS_PMCSETUP(pa6t_pmc0, SPRN_PA6T_PMC0);
	219	SYSFS_PMCSETUP(pa6t_pmc1, SPRN_PA6T_PMC1);
	220	SYSFS_PMCSETUP(pa6t_pmc2, SPRN_PA6T_PMC2);
	221	SYSFS_PMCSETUP(pa6t_pmc3, SPRN_PA6T_PMC3);
	222	SYSFS_PMCSETUP(pa6t_pmc4, SPRN_PA6T_PMC4);
	223	SYSFS_PMCSETUP(pa6t_pmc5, SPRN_PA6T_PMC5);
2e1957fd OJ	224	#ifdef CONFIG_DEBUG_KERNEL
	225	SYSFS_PMCSETUP(hid0, SPRN_HID0);
	226	SYSFS_PMCSETUP(hid1, SPRN_HID1);
	227	SYSFS_PMCSETUP(hid4, SPRN_HID4);
	228	SYSFS_PMCSETUP(hid5, SPRN_HID5);
	229	SYSFS_PMCSETUP(ima0, SPRN_PA6T_IMA0);
	230	SYSFS_PMCSETUP(ima1, SPRN_PA6T_IMA1);
	231	SYSFS_PMCSETUP(ima2, SPRN_PA6T_IMA2);
	232	SYSFS_PMCSETUP(ima3, SPRN_PA6T_IMA3);
	233	SYSFS_PMCSETUP(ima4, SPRN_PA6T_IMA4);
	234	SYSFS_PMCSETUP(ima5, SPRN_PA6T_IMA5);
	235	SYSFS_PMCSETUP(ima6, SPRN_PA6T_IMA6);
	236	SYSFS_PMCSETUP(ima7, SPRN_PA6T_IMA7);
	237	SYSFS_PMCSETUP(ima8, SPRN_PA6T_IMA8);
	238	SYSFS_PMCSETUP(ima9, SPRN_PA6T_IMA9);
	239	SYSFS_PMCSETUP(imaat, SPRN_PA6T_IMAAT);
	240	SYSFS_PMCSETUP(btcr, SPRN_PA6T_BTCR);
	241	SYSFS_PMCSETUP(pccr, SPRN_PA6T_PCCR);
	242	SYSFS_PMCSETUP(rpccr, SPRN_PA6T_RPCCR);
	243	SYSFS_PMCSETUP(der, SPRN_PA6T_DER);
	244	SYSFS_PMCSETUP(mer, SPRN_PA6T_MER);
	245	SYSFS_PMCSETUP(ber, SPRN_PA6T_BER);
	246	SYSFS_PMCSETUP(ier, SPRN_PA6T_IER);
	247	SYSFS_PMCSETUP(sier, SPRN_PA6T_SIER);
	248	SYSFS_PMCSETUP(siar, SPRN_PA6T_SIAR);
	249	SYSFS_PMCSETUP(tsr0, SPRN_PA6T_TSR0);
	250	SYSFS_PMCSETUP(tsr1, SPRN_PA6T_TSR1);
	251	SYSFS_PMCSETUP(tsr2, SPRN_PA6T_TSR2);
	252	SYSFS_PMCSETUP(tsr3, SPRN_PA6T_TSR3);
	253	#endif /* CONFIG_DEBUG_KERNEL */
b950bdd0	254	#endif /* HAS_PPC_PMC_PA6T */
6529c13d	255
b950bdd0	256	#ifdef HAS_PPC_PMC_IBM
6529c13d OJ	257	static struct sysdev_attribute ibm_common_attrs[] = {
	258	_SYSDEV_ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0),
	259	_SYSDEV_ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1),
	260	};
b950bdd0 BH	261	#endif /* HAS_PPC_PMC_G4 */
	262
	263	#ifdef HAS_PPC_PMC_G4
	264	static struct sysdev_attribute g4_common_attrs[] = {
	265	_SYSDEV_ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0),
	266	_SYSDEV_ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1),
	267	_SYSDEV_ATTR(mmcr2, 0600, show_mmcr2, store_mmcr2),
	268	};
	269	#endif /* HAS_PPC_PMC_G4 */
6529c13d	270
b950bdd0	271	static struct sysdev_attribute classic_pmc_attrs[] = {
6529c13d OJ	272	_SYSDEV_ATTR(pmc1, 0600, show_pmc1, store_pmc1),
	273	_SYSDEV_ATTR(pmc2, 0600, show_pmc2, store_pmc2),
	274	_SYSDEV_ATTR(pmc3, 0600, show_pmc3, store_pmc3),
	275	_SYSDEV_ATTR(pmc4, 0600, show_pmc4, store_pmc4),
	276	_SYSDEV_ATTR(pmc5, 0600, show_pmc5, store_pmc5),
	277	_SYSDEV_ATTR(pmc6, 0600, show_pmc6, store_pmc6),
b950bdd0	278	#ifdef CONFIG_PPC64
6529c13d OJ	279	_SYSDEV_ATTR(pmc7, 0600, show_pmc7, store_pmc7),
6529c13d OJ	280	_SYSDEV_ATTR(pmc8, 0600, show_pmc8, store_pmc8),
b950bdd0	281	#endif
6529c13d OJ	282	};
6529c13d OJ	283
b950bdd0	284	#ifdef HAS_PPC_PMC_PA6T
6529c13d OJ	285	static struct sysdev_attribute pa6t_attrs[] = {
	286	_SYSDEV_ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0),
	287	_SYSDEV_ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1),
	288	_SYSDEV_ATTR(pmc0, 0600, show_pa6t_pmc0, store_pa6t_pmc0),
	289	_SYSDEV_ATTR(pmc1, 0600, show_pa6t_pmc1, store_pa6t_pmc1),
	290	_SYSDEV_ATTR(pmc2, 0600, show_pa6t_pmc2, store_pa6t_pmc2),
	291	_SYSDEV_ATTR(pmc3, 0600, show_pa6t_pmc3, store_pa6t_pmc3),
	292	_SYSDEV_ATTR(pmc4, 0600, show_pa6t_pmc4, store_pa6t_pmc4),
	293	_SYSDEV_ATTR(pmc5, 0600, show_pa6t_pmc5, store_pa6t_pmc5),
2e1957fd OJ	294	#ifdef CONFIG_DEBUG_KERNEL
	295	_SYSDEV_ATTR(hid0, 0600, show_hid0, store_hid0),
	296	_SYSDEV_ATTR(hid1, 0600, show_hid1, store_hid1),
	297	_SYSDEV_ATTR(hid4, 0600, show_hid4, store_hid4),
	298	_SYSDEV_ATTR(hid5, 0600, show_hid5, store_hid5),
	299	_SYSDEV_ATTR(ima0, 0600, show_ima0, store_ima0),
	300	_SYSDEV_ATTR(ima1, 0600, show_ima1, store_ima1),
	301	_SYSDEV_ATTR(ima2, 0600, show_ima2, store_ima2),
	302	_SYSDEV_ATTR(ima3, 0600, show_ima3, store_ima3),
	303	_SYSDEV_ATTR(ima4, 0600, show_ima4, store_ima4),
	304	_SYSDEV_ATTR(ima5, 0600, show_ima5, store_ima5),
	305	_SYSDEV_ATTR(ima6, 0600, show_ima6, store_ima6),
	306	_SYSDEV_ATTR(ima7, 0600, show_ima7, store_ima7),
	307	_SYSDEV_ATTR(ima8, 0600, show_ima8, store_ima8),
	308	_SYSDEV_ATTR(ima9, 0600, show_ima9, store_ima9),
	309	_SYSDEV_ATTR(imaat, 0600, show_imaat, store_imaat),
	310	_SYSDEV_ATTR(btcr, 0600, show_btcr, store_btcr),
	311	_SYSDEV_ATTR(pccr, 0600, show_pccr, store_pccr),
	312	_SYSDEV_ATTR(rpccr, 0600, show_rpccr, store_rpccr),
	313	_SYSDEV_ATTR(der, 0600, show_der, store_der),
	314	_SYSDEV_ATTR(mer, 0600, show_mer, store_mer),
	315	_SYSDEV_ATTR(ber, 0600, show_ber, store_ber),
	316	_SYSDEV_ATTR(ier, 0600, show_ier, store_ier),
	317	_SYSDEV_ATTR(sier, 0600, show_sier, store_sier),
	318	_SYSDEV_ATTR(siar, 0600, show_siar, store_siar),
	319	_SYSDEV_ATTR(tsr0, 0600, show_tsr0, store_tsr0),
	320	_SYSDEV_ATTR(tsr1, 0600, show_tsr1, store_tsr1),
	321	_SYSDEV_ATTR(tsr2, 0600, show_tsr2, store_tsr2),
	322	_SYSDEV_ATTR(tsr3, 0600, show_tsr3, store_tsr3),
	323	#endif /* CONFIG_DEBUG_KERNEL */
6529c13d	324	};
b950bdd0 BH	325	#endif /* HAS_PPC_PMC_PA6T */
b950bdd0 BH	326	#endif /* HAS_PPC_PMC_CLASSIC */
6529c13d	327
9ba1984e	328	static void __cpuinit register_cpu_online(unsigned int cpu)
1da177e4 LT	329	{
	330	struct cpu *c = &per_cpu(cpu_devices, cpu);
	331	struct sys_device *s = &c->sysdev;
6529c13d OJ	332	struct sysdev_attribute attrs, pmc_attrs;
6529c13d OJ	333	int i, nattrs;
1da177e4	334
b950bdd0	335	#ifdef CONFIG_PPC64
ad5cb17f SR	336	if (!firmware_has_feature(FW_FEATURE_ISERIES) &&
ad5cb17f SR	337	cpu_has_feature(CPU_FTR_SMT))
1da177e4	338	sysdev_create_file(s, &attr_smt_snooze_delay);
b950bdd0	339	#endif
1da177e4 LT	340
1da177e4 LT	341	/* PMC stuff */
6529c13d	342	switch (cur_cpu_spec->pmc_type) {
b950bdd0	343	#ifdef HAS_PPC_PMC_IBM
6529c13d OJ	344	case PPC_PMC_IBM:
	345	attrs = ibm_common_attrs;
	346	nattrs = sizeof(ibm_common_attrs) / sizeof(struct sysdev_attribute);
b950bdd0	347	pmc_attrs = classic_pmc_attrs;
6529c13d	348	break;
b950bdd0 BH	349	#endif /* HAS_PPC_PMC_IBM */
	350	#ifdef HAS_PPC_PMC_G4
	351	case PPC_PMC_G4:
	352	attrs = g4_common_attrs;
	353	nattrs = sizeof(g4_common_attrs) / sizeof(struct sysdev_attribute);
	354	pmc_attrs = classic_pmc_attrs;
	355	break;
	356	#endif /* HAS_PPC_PMC_G4 */
	357	#ifdef HAS_PPC_PMC_PA6T
6529c13d OJ	358	case PPC_PMC_PA6T:
	359	/* PA Semi starts counting at PMC0 */
	360	attrs = pa6t_attrs;
	361	nattrs = sizeof(pa6t_attrs) / sizeof(struct sysdev_attribute);
	362	pmc_attrs = NULL;
	363	break;
b950bdd0	364	#endif /* HAS_PPC_PMC_PA6T */
6529c13d OJ	365	default:
	366	attrs = NULL;
	367	nattrs = 0;
	368	pmc_attrs = NULL;
	369	}
	370
	371	for (i = 0; i < nattrs; i++)
	372	sysdev_create_file(s, &attrs[i]);
1da177e4	373
6529c13d OJ	374	if (pmc_attrs)
	375	for (i = 0; i < cur_cpu_spec->num_pmcs; i++)
	376	sysdev_create_file(s, &pmc_attrs[i]);
1da177e4	377
b950bdd0	378	#ifdef CONFIG_PPC64
1da177e4 LT	379	if (cpu_has_feature(CPU_FTR_MMCRA))
	380	sysdev_create_file(s, &attr_mmcra);
	381
afd05423	382	if (cpu_has_feature(CPU_FTR_PURR))
1da177e4	383	sysdev_create_file(s, &attr_purr);
4c198557	384
f050982a AB	385	if (cpu_has_feature(CPU_FTR_SPURR))
	386	sysdev_create_file(s, &attr_spurr);
	387
4c198557 AB	388	if (cpu_has_feature(CPU_FTR_DSCR))
4c198557 AB	389	sysdev_create_file(s, &attr_dscr);
b950bdd0	390	#endif /* CONFIG_PPC64 */
124c27d3	391
93197a36	392	cacheinfo_cpu_online(cpu);
1da177e4 LT	393	}
	394
	395	#ifdef CONFIG_HOTPLUG_CPU
	396	static void unregister_cpu_online(unsigned int cpu)
	397	{
	398	struct cpu *c = &per_cpu(cpu_devices, cpu);
	399	struct sys_device *s = &c->sysdev;
6529c13d OJ	400	struct sysdev_attribute attrs, pmc_attrs;
6529c13d OJ	401	int i, nattrs;
1da177e4	402
72486f1f	403	BUG_ON(!c->hotpluggable);
1da177e4	404
a1e0eb10	405	#ifdef CONFIG_PPC64
ad5cb17f SR	406	if (!firmware_has_feature(FW_FEATURE_ISERIES) &&
ad5cb17f SR	407	cpu_has_feature(CPU_FTR_SMT))
1da177e4	408	sysdev_remove_file(s, &attr_smt_snooze_delay);
a1e0eb10	409	#endif
1da177e4 LT	410
1da177e4 LT	411	/* PMC stuff */
6529c13d	412	switch (cur_cpu_spec->pmc_type) {
b950bdd0	413	#ifdef HAS_PPC_PMC_IBM
6529c13d OJ	414	case PPC_PMC_IBM:
	415	attrs = ibm_common_attrs;
	416	nattrs = sizeof(ibm_common_attrs) / sizeof(struct sysdev_attribute);
b950bdd0 BH	417	pmc_attrs = classic_pmc_attrs;
	418	break;
	419	#endif /* HAS_PPC_PMC_IBM */
	420	#ifdef HAS_PPC_PMC_G4
	421	case PPC_PMC_G4:
	422	attrs = g4_common_attrs;
	423	nattrs = sizeof(g4_common_attrs) / sizeof(struct sysdev_attribute);
	424	pmc_attrs = classic_pmc_attrs;
6529c13d	425	break;
b950bdd0 BH	426	#endif /* HAS_PPC_PMC_G4 */
b950bdd0 BH	427	#ifdef HAS_PPC_PMC_PA6T
6529c13d OJ	428	case PPC_PMC_PA6T:
	429	/* PA Semi starts counting at PMC0 */
	430	attrs = pa6t_attrs;
	431	nattrs = sizeof(pa6t_attrs) / sizeof(struct sysdev_attribute);
	432	pmc_attrs = NULL;
	433	break;
b950bdd0	434	#endif /* HAS_PPC_PMC_PA6T */
6529c13d OJ	435	default:
	436	attrs = NULL;
	437	nattrs = 0;
	438	pmc_attrs = NULL;
	439	}
1da177e4	440
6529c13d OJ	441	for (i = 0; i < nattrs; i++)
	442	sysdev_remove_file(s, &attrs[i]);
	443
	444	if (pmc_attrs)
	445	for (i = 0; i < cur_cpu_spec->num_pmcs; i++)
	446	sysdev_remove_file(s, &pmc_attrs[i]);
1da177e4	447
b950bdd0	448	#ifdef CONFIG_PPC64
1da177e4 LT	449	if (cpu_has_feature(CPU_FTR_MMCRA))
	450	sysdev_remove_file(s, &attr_mmcra);
	451
afd05423	452	if (cpu_has_feature(CPU_FTR_PURR))
1da177e4	453	sysdev_remove_file(s, &attr_purr);
4c198557	454
f050982a AB	455	if (cpu_has_feature(CPU_FTR_SPURR))
	456	sysdev_remove_file(s, &attr_spurr);
	457
4c198557 AB	458	if (cpu_has_feature(CPU_FTR_DSCR))
4c198557 AB	459	sysdev_remove_file(s, &attr_dscr);
b950bdd0	460	#endif /* CONFIG_PPC64 */
124c27d3	461
93197a36	462	cacheinfo_cpu_offline(cpu);
1da177e4 LT	463	}
	464	#endif /* CONFIG_HOTPLUG_CPU */
	465
8c78f307	466	static int __cpuinit sysfs_cpu_notify(struct notifier_block *self,
1da177e4 LT	467	unsigned long action, void *hcpu)
	468	{
	469	unsigned int cpu = (unsigned int)(long)hcpu;
	470
	471	switch (action) {
	472	case CPU_ONLINE:
8bb78442	473	case CPU_ONLINE_FROZEN:
1da177e4 LT	474	register_cpu_online(cpu);
	475	break;
	476	#ifdef CONFIG_HOTPLUG_CPU
	477	case CPU_DEAD:
8bb78442	478	case CPU_DEAD_FROZEN:
1da177e4 LT	479	unregister_cpu_online(cpu);
	480	break;
	481	#endif
	482	}
	483	return NOTIFY_OK;
	484	}
	485
8c78f307	486	static struct notifier_block __cpuinitdata sysfs_cpu_nb = {
1da177e4 LT	487	.notifier_call = sysfs_cpu_notify,
	488	};
	489
0344c6c5 CK	490	static DEFINE_MUTEX(cpu_mutex);
	491
	492	int cpu_add_sysdev_attr(struct sysdev_attribute *attr)
	493	{
	494	int cpu;
	495
	496	mutex_lock(&cpu_mutex);
	497
	498	for_each_possible_cpu(cpu) {
	499	sysdev_create_file(get_cpu_sysdev(cpu), attr);
	500	}
	501
	502	mutex_unlock(&cpu_mutex);
	503	return 0;
	504	}
	505	EXPORT_SYMBOL_GPL(cpu_add_sysdev_attr);
	506
	507	int cpu_add_sysdev_attr_group(struct attribute_group *attrs)
	508	{
	509	int cpu;
	510	struct sys_device *sysdev;
6bcc4c01	511	int ret;
0344c6c5 CK	512
	513	mutex_lock(&cpu_mutex);
	514
	515	for_each_possible_cpu(cpu) {
	516	sysdev = get_cpu_sysdev(cpu);
6bcc4c01 OJ	517	ret = sysfs_create_group(&sysdev->kobj, attrs);
6bcc4c01 OJ	518	WARN_ON(ret != 0);
0344c6c5 CK	519	}
	520
	521	mutex_unlock(&cpu_mutex);
	522	return 0;
	523	}
	524	EXPORT_SYMBOL_GPL(cpu_add_sysdev_attr_group);
	525
	526
	527	void cpu_remove_sysdev_attr(struct sysdev_attribute *attr)
	528	{
	529	int cpu;
	530
	531	mutex_lock(&cpu_mutex);
	532
	533	for_each_possible_cpu(cpu) {
	534	sysdev_remove_file(get_cpu_sysdev(cpu), attr);
	535	}
	536
	537	mutex_unlock(&cpu_mutex);
	538	}
	539	EXPORT_SYMBOL_GPL(cpu_remove_sysdev_attr);
	540
	541	void cpu_remove_sysdev_attr_group(struct attribute_group *attrs)
	542	{
	543	int cpu;
	544	struct sys_device *sysdev;
	545
	546	mutex_lock(&cpu_mutex);
	547
	548	for_each_possible_cpu(cpu) {
	549	sysdev = get_cpu_sysdev(cpu);
	550	sysfs_remove_group(&sysdev->kobj, attrs);
	551	}
	552
	553	mutex_unlock(&cpu_mutex);
	554	}
	555	EXPORT_SYMBOL_GPL(cpu_remove_sysdev_attr_group);
	556
	557
1da177e4 LT	558	/* NUMA stuff */
	559
	560	#ifdef CONFIG_NUMA
1da177e4 LT	561	static void register_nodes(void)
	562	{
	563	int i;
	564
0fc44159 YG	565	for (i = 0; i < MAX_NUMNODES; i++)
0fc44159 YG	566	register_one_node(i);
1da177e4	567	}
953039c8 JK	568
	569	int sysfs_add_device_to_node(struct sys_device *dev, int nid)
	570	{
	571	struct node *node = &node_devices[nid];
	572	return sysfs_create_link(&node->sysdev.kobj, &dev->kobj,
	573	kobject_name(&dev->kobj));
	574	}
12654f77	575	EXPORT_SYMBOL_GPL(sysfs_add_device_to_node);
953039c8 JK	576
	577	void sysfs_remove_device_from_node(struct sys_device *dev, int nid)
	578	{
	579	struct node *node = &node_devices[nid];
	580	sysfs_remove_link(&node->sysdev.kobj, kobject_name(&dev->kobj));
	581	}
12654f77	582	EXPORT_SYMBOL_GPL(sysfs_remove_device_from_node);
953039c8	583
1da177e4 LT	584	#else
	585	static void register_nodes(void)
	586	{
	587	return;
	588	}
953039c8	589
1da177e4 LT	590	#endif
	591
	592	/* Only valid if CPU is present. */
00bf6e90 SR	593	static ssize_t show_physical_id(struct sys_device *dev,
00bf6e90 SR	594	struct sysdev_attribute attr, char buf)
1da177e4 LT	595	{
	596	struct cpu *cpu = container_of(dev, struct cpu, sysdev);
	597
	598	return sprintf(buf, "%d\n", get_hard_smp_processor_id(cpu->sysdev.id));
	599	}
	600	static SYSDEV_ATTR(physical_id, 0444, show_physical_id, NULL);
	601
	602	static int __init topology_init(void)
	603	{
	604	int cpu;
1da177e4 LT	605
1da177e4 LT	606	register_nodes();
1da177e4 LT	607	register_cpu_notifier(&sysfs_cpu_nb);
1da177e4 LT	608
0e551954	609	for_each_possible_cpu(cpu) {
1da177e4 LT	610	struct cpu *c = &per_cpu(cpu_devices, cpu);
1da177e4 LT	611
1da177e4 LT	612	/*
	613	* For now, we just see if the system supports making
	614	* the RTAS calls for CPU hotplug. But, there may be a
	615	* more comprehensive way to do this for an individual
	616	* CPU. For instance, the boot cpu might never be valid
	617	* for hotplugging.
	618	*/
72486f1f SS	619	if (ppc_md.cpu_die)
72486f1f SS	620	c->hotpluggable = 1;
1da177e4	621
72486f1f	622	if (cpu_online(cpu) \|\| c->hotpluggable) {
76b67ed9	623	register_cpu(c, cpu);
1da177e4 LT	624
	625	sysdev_create_file(&c->sysdev, &attr_physical_id);
	626	}
	627
	628	if (cpu_online(cpu))
	629	register_cpu_online(cpu);
	630	}
	631
	632	return 0;
	633	}
e9e77ce8	634	subsys_initcall(topology_init);