[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);

#if defined(CONFIG_6xx) || defined(CONFIG_PPC64)
/* XXX convert to rusty's on_one_cpu */
static unsigned long run_on_cpu(unsigned long cpu,
			        unsigned long (*func)(unsigned long),
				unsigned long arg)
{
	cpumask_t old_affinity = current->cpus_allowed;
	unsigned long ret;

	/* should return -EINVAL to userspace */
	if (set_cpus_allowed(current, cpumask_of_cpu(cpu)))
		return 0;

	ret = func(arg);

	set_cpus_allowed(current, old_affinity);

	return ret;
}
#endif

#define SYSFS_PMCSETUP(NAME, ADDRESS) \
static unsigned long read_##NAME(unsigned long junk) \
{ \
	return mfspr(ADDRESS); \
} \
static unsigned long write_##NAME(unsigned long val) \
{ \
	ppc_enable_pmcs(); \
	mtspr(ADDRESS, val); \
	return 0; \
} \
static ssize_t show_##NAME(struct sys_device *dev, \
			struct sysdev_attribute *attr, \
			char *buf) \
{ \
	struct cpu *cpu = container_of(dev, struct cpu, sysdev); \
	unsigned long val = run_on_cpu(cpu->sysdev.id, read_##NAME, 0); \
	return sprintf(buf, "%lx\n", val); \
} \
static ssize_t __used \
	store_##NAME(struct sys_device *dev, struct sysdev_attribute *attr, \
			const char *buf, size_t count) \
{ \
	struct cpu *cpu = container_of(dev, struct cpu, sysdev); \
	unsigned long val; \
	int ret = sscanf(buf, "%lx", &val); \
	if (ret != 1) \
		return -EINVAL; \
	run_on_cpu(cpu->sysdev.id, write_##NAME, val); \
	return count; \
}


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

#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
33a7f122	137	#if defined(CONFIG_6xx) \|\| defined(CONFIG_PPC64)
1da177e4 LT	138	/* XXX convert to rusty's on_one_cpu */
	139	static unsigned long run_on_cpu(unsigned long cpu,
	140	unsigned long (*func)(unsigned long),
	141	unsigned long arg)
	142	{
	143	cpumask_t old_affinity = current->cpus_allowed;
	144	unsigned long ret;
	145
	146	/* should return -EINVAL to userspace */
	147	if (set_cpus_allowed(current, cpumask_of_cpu(cpu)))
	148	return 0;
	149
	150	ret = func(arg);
	151
	152	set_cpus_allowed(current, old_affinity);
	153
	154	return ret;
	155	}
33a7f122	156	#endif
1da177e4 LT	157
	158	#define SYSFS_PMCSETUP(NAME, ADDRESS) \
	159	static unsigned long read_##NAME(unsigned long junk) \
	160	{ \
	161	return mfspr(ADDRESS); \
	162	} \
	163	static unsigned long write_##NAME(unsigned long val) \
	164	{ \
b950bdd0	165	ppc_enable_pmcs(); \
1da177e4 LT	166	mtspr(ADDRESS, val); \
	167	return 0; \
	168	} \
4a0b2b4d AK	169	static ssize_t show_##NAME(struct sys_device *dev, \
	170	struct sysdev_attribute *attr, \
	171	char *buf) \
1da177e4 LT	172	{ \
	173	struct cpu *cpu = container_of(dev, struct cpu, sysdev); \
	174	unsigned long val = run_on_cpu(cpu->sysdev.id, read_##NAME, 0); \
	175	return sprintf(buf, "%lx\n", val); \
	176	} \
3ff6eecc	177	static ssize_t __used \
4a0b2b4d AK	178	store_##NAME(struct sys_device dev, struct sysdev_attribute attr, \
4a0b2b4d AK	179	const char *buf, size_t count) \
1da177e4 LT	180	{ \
	181	struct cpu *cpu = container_of(dev, struct cpu, sysdev); \
	182	unsigned long val; \
	183	int ret = sscanf(buf, "%lx", &val); \
	184	if (ret != 1) \
	185	return -EINVAL; \
	186	run_on_cpu(cpu->sysdev.id, write_##NAME, val); \
	187	return count; \
	188	}
	189
6529c13d OJ	190
	191	/* Let's define all possible registers, we'll only hook up the ones
	192	* that are implemented on the current processor
	193	*/
	194
33a7f122	195	#if defined(CONFIG_PPC64)
b950bdd0 BH	196	#define HAS_PPC_PMC_CLASSIC 1
	197	#define HAS_PPC_PMC_IBM 1
	198	#define HAS_PPC_PMC_PA6T 1
33a7f122	199	#elif defined(CONFIG_6xx)
b950bdd0 BH	200	#define HAS_PPC_PMC_CLASSIC 1
	201	#define HAS_PPC_PMC_IBM 1
	202	#define HAS_PPC_PMC_G4 1
	203	#endif
	204
	205
	206	#ifdef HAS_PPC_PMC_CLASSIC
1da177e4 LT	207	SYSFS_PMCSETUP(mmcr0, SPRN_MMCR0);
1da177e4 LT	208	SYSFS_PMCSETUP(mmcr1, SPRN_MMCR1);
1da177e4 LT	209	SYSFS_PMCSETUP(pmc1, SPRN_PMC1);
	210	SYSFS_PMCSETUP(pmc2, SPRN_PMC2);
	211	SYSFS_PMCSETUP(pmc3, SPRN_PMC3);
	212	SYSFS_PMCSETUP(pmc4, SPRN_PMC4);
	213	SYSFS_PMCSETUP(pmc5, SPRN_PMC5);
	214	SYSFS_PMCSETUP(pmc6, SPRN_PMC6);
b950bdd0 BH	215
	216	#ifdef HAS_PPC_PMC_G4
	217	SYSFS_PMCSETUP(mmcr2, SPRN_MMCR2);
	218	#endif
	219
	220	#ifdef CONFIG_PPC64
1da177e4 LT	221	SYSFS_PMCSETUP(pmc7, SPRN_PMC7);
1da177e4 LT	222	SYSFS_PMCSETUP(pmc8, SPRN_PMC8);
b950bdd0 BH	223
b950bdd0 BH	224	SYSFS_PMCSETUP(mmcra, SPRN_MMCRA);
1da177e4	225	SYSFS_PMCSETUP(purr, SPRN_PURR);
f050982a	226	SYSFS_PMCSETUP(spurr, SPRN_SPURR);
4c198557	227	SYSFS_PMCSETUP(dscr, SPRN_DSCR);
1da177e4	228
b950bdd0 BH	229	static SYSDEV_ATTR(mmcra, 0600, show_mmcra, store_mmcra);
	230	static SYSDEV_ATTR(spurr, 0600, show_spurr, NULL);
	231	static SYSDEV_ATTR(dscr, 0600, show_dscr, store_dscr);
	232	static SYSDEV_ATTR(purr, 0600, show_purr, store_purr);
	233	#endif /* CONFIG_PPC64 */
	234
	235	#ifdef HAS_PPC_PMC_PA6T
25fc530e OJ	236	SYSFS_PMCSETUP(pa6t_pmc0, SPRN_PA6T_PMC0);
	237	SYSFS_PMCSETUP(pa6t_pmc1, SPRN_PA6T_PMC1);
	238	SYSFS_PMCSETUP(pa6t_pmc2, SPRN_PA6T_PMC2);
	239	SYSFS_PMCSETUP(pa6t_pmc3, SPRN_PA6T_PMC3);
	240	SYSFS_PMCSETUP(pa6t_pmc4, SPRN_PA6T_PMC4);
	241	SYSFS_PMCSETUP(pa6t_pmc5, SPRN_PA6T_PMC5);
2e1957fd OJ	242	#ifdef CONFIG_DEBUG_KERNEL
	243	SYSFS_PMCSETUP(hid0, SPRN_HID0);
	244	SYSFS_PMCSETUP(hid1, SPRN_HID1);
	245	SYSFS_PMCSETUP(hid4, SPRN_HID4);
	246	SYSFS_PMCSETUP(hid5, SPRN_HID5);
	247	SYSFS_PMCSETUP(ima0, SPRN_PA6T_IMA0);
	248	SYSFS_PMCSETUP(ima1, SPRN_PA6T_IMA1);
	249	SYSFS_PMCSETUP(ima2, SPRN_PA6T_IMA2);
	250	SYSFS_PMCSETUP(ima3, SPRN_PA6T_IMA3);
	251	SYSFS_PMCSETUP(ima4, SPRN_PA6T_IMA4);
	252	SYSFS_PMCSETUP(ima5, SPRN_PA6T_IMA5);
	253	SYSFS_PMCSETUP(ima6, SPRN_PA6T_IMA6);
	254	SYSFS_PMCSETUP(ima7, SPRN_PA6T_IMA7);
	255	SYSFS_PMCSETUP(ima8, SPRN_PA6T_IMA8);
	256	SYSFS_PMCSETUP(ima9, SPRN_PA6T_IMA9);
	257	SYSFS_PMCSETUP(imaat, SPRN_PA6T_IMAAT);
	258	SYSFS_PMCSETUP(btcr, SPRN_PA6T_BTCR);
	259	SYSFS_PMCSETUP(pccr, SPRN_PA6T_PCCR);
	260	SYSFS_PMCSETUP(rpccr, SPRN_PA6T_RPCCR);
	261	SYSFS_PMCSETUP(der, SPRN_PA6T_DER);
	262	SYSFS_PMCSETUP(mer, SPRN_PA6T_MER);
	263	SYSFS_PMCSETUP(ber, SPRN_PA6T_BER);
	264	SYSFS_PMCSETUP(ier, SPRN_PA6T_IER);
	265	SYSFS_PMCSETUP(sier, SPRN_PA6T_SIER);
	266	SYSFS_PMCSETUP(siar, SPRN_PA6T_SIAR);
	267	SYSFS_PMCSETUP(tsr0, SPRN_PA6T_TSR0);
	268	SYSFS_PMCSETUP(tsr1, SPRN_PA6T_TSR1);
	269	SYSFS_PMCSETUP(tsr2, SPRN_PA6T_TSR2);
	270	SYSFS_PMCSETUP(tsr3, SPRN_PA6T_TSR3);
	271	#endif /* CONFIG_DEBUG_KERNEL */
b950bdd0	272	#endif /* HAS_PPC_PMC_PA6T */
6529c13d	273
b950bdd0	274	#ifdef HAS_PPC_PMC_IBM
6529c13d OJ	275	static struct sysdev_attribute ibm_common_attrs[] = {
	276	_SYSDEV_ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0),
	277	_SYSDEV_ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1),
	278	};
b950bdd0 BH	279	#endif /* HAS_PPC_PMC_G4 */
	280
	281	#ifdef HAS_PPC_PMC_G4
	282	static struct sysdev_attribute g4_common_attrs[] = {
	283	_SYSDEV_ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0),
	284	_SYSDEV_ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1),
	285	_SYSDEV_ATTR(mmcr2, 0600, show_mmcr2, store_mmcr2),
	286	};
	287	#endif /* HAS_PPC_PMC_G4 */
6529c13d	288
b950bdd0	289	static struct sysdev_attribute classic_pmc_attrs[] = {
6529c13d OJ	290	_SYSDEV_ATTR(pmc1, 0600, show_pmc1, store_pmc1),
	291	_SYSDEV_ATTR(pmc2, 0600, show_pmc2, store_pmc2),
	292	_SYSDEV_ATTR(pmc3, 0600, show_pmc3, store_pmc3),
	293	_SYSDEV_ATTR(pmc4, 0600, show_pmc4, store_pmc4),
	294	_SYSDEV_ATTR(pmc5, 0600, show_pmc5, store_pmc5),
	295	_SYSDEV_ATTR(pmc6, 0600, show_pmc6, store_pmc6),
b950bdd0	296	#ifdef CONFIG_PPC64
6529c13d OJ	297	_SYSDEV_ATTR(pmc7, 0600, show_pmc7, store_pmc7),
6529c13d OJ	298	_SYSDEV_ATTR(pmc8, 0600, show_pmc8, store_pmc8),
b950bdd0	299	#endif
6529c13d OJ	300	};
6529c13d OJ	301
b950bdd0	302	#ifdef HAS_PPC_PMC_PA6T
6529c13d OJ	303	static struct sysdev_attribute pa6t_attrs[] = {
	304	_SYSDEV_ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0),
	305	_SYSDEV_ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1),
	306	_SYSDEV_ATTR(pmc0, 0600, show_pa6t_pmc0, store_pa6t_pmc0),
	307	_SYSDEV_ATTR(pmc1, 0600, show_pa6t_pmc1, store_pa6t_pmc1),
	308	_SYSDEV_ATTR(pmc2, 0600, show_pa6t_pmc2, store_pa6t_pmc2),
	309	_SYSDEV_ATTR(pmc3, 0600, show_pa6t_pmc3, store_pa6t_pmc3),
	310	_SYSDEV_ATTR(pmc4, 0600, show_pa6t_pmc4, store_pa6t_pmc4),
	311	_SYSDEV_ATTR(pmc5, 0600, show_pa6t_pmc5, store_pa6t_pmc5),
2e1957fd OJ	312	#ifdef CONFIG_DEBUG_KERNEL
	313	_SYSDEV_ATTR(hid0, 0600, show_hid0, store_hid0),
	314	_SYSDEV_ATTR(hid1, 0600, show_hid1, store_hid1),
	315	_SYSDEV_ATTR(hid4, 0600, show_hid4, store_hid4),
	316	_SYSDEV_ATTR(hid5, 0600, show_hid5, store_hid5),
	317	_SYSDEV_ATTR(ima0, 0600, show_ima0, store_ima0),
	318	_SYSDEV_ATTR(ima1, 0600, show_ima1, store_ima1),
	319	_SYSDEV_ATTR(ima2, 0600, show_ima2, store_ima2),
	320	_SYSDEV_ATTR(ima3, 0600, show_ima3, store_ima3),
	321	_SYSDEV_ATTR(ima4, 0600, show_ima4, store_ima4),
	322	_SYSDEV_ATTR(ima5, 0600, show_ima5, store_ima5),
	323	_SYSDEV_ATTR(ima6, 0600, show_ima6, store_ima6),
	324	_SYSDEV_ATTR(ima7, 0600, show_ima7, store_ima7),
	325	_SYSDEV_ATTR(ima8, 0600, show_ima8, store_ima8),
	326	_SYSDEV_ATTR(ima9, 0600, show_ima9, store_ima9),
	327	_SYSDEV_ATTR(imaat, 0600, show_imaat, store_imaat),
	328	_SYSDEV_ATTR(btcr, 0600, show_btcr, store_btcr),
	329	_SYSDEV_ATTR(pccr, 0600, show_pccr, store_pccr),
	330	_SYSDEV_ATTR(rpccr, 0600, show_rpccr, store_rpccr),
	331	_SYSDEV_ATTR(der, 0600, show_der, store_der),
	332	_SYSDEV_ATTR(mer, 0600, show_mer, store_mer),
	333	_SYSDEV_ATTR(ber, 0600, show_ber, store_ber),
	334	_SYSDEV_ATTR(ier, 0600, show_ier, store_ier),
	335	_SYSDEV_ATTR(sier, 0600, show_sier, store_sier),
	336	_SYSDEV_ATTR(siar, 0600, show_siar, store_siar),
	337	_SYSDEV_ATTR(tsr0, 0600, show_tsr0, store_tsr0),
	338	_SYSDEV_ATTR(tsr1, 0600, show_tsr1, store_tsr1),
	339	_SYSDEV_ATTR(tsr2, 0600, show_tsr2, store_tsr2),
	340	_SYSDEV_ATTR(tsr3, 0600, show_tsr3, store_tsr3),
	341	#endif /* CONFIG_DEBUG_KERNEL */
6529c13d	342	};
b950bdd0 BH	343	#endif /* HAS_PPC_PMC_PA6T */
b950bdd0 BH	344	#endif /* HAS_PPC_PMC_CLASSIC */
6529c13d	345
9ba1984e	346	static void __cpuinit register_cpu_online(unsigned int cpu)
1da177e4 LT	347	{
	348	struct cpu *c = &per_cpu(cpu_devices, cpu);
	349	struct sys_device *s = &c->sysdev;
6529c13d OJ	350	struct sysdev_attribute attrs, pmc_attrs;
6529c13d OJ	351	int i, nattrs;
1da177e4	352
b950bdd0	353	#ifdef CONFIG_PPC64
ad5cb17f SR	354	if (!firmware_has_feature(FW_FEATURE_ISERIES) &&
ad5cb17f SR	355	cpu_has_feature(CPU_FTR_SMT))
1da177e4	356	sysdev_create_file(s, &attr_smt_snooze_delay);
b950bdd0	357	#endif
1da177e4 LT	358
1da177e4 LT	359	/* PMC stuff */
6529c13d	360	switch (cur_cpu_spec->pmc_type) {
b950bdd0	361	#ifdef HAS_PPC_PMC_IBM
6529c13d OJ	362	case PPC_PMC_IBM:
	363	attrs = ibm_common_attrs;
	364	nattrs = sizeof(ibm_common_attrs) / sizeof(struct sysdev_attribute);
b950bdd0	365	pmc_attrs = classic_pmc_attrs;
6529c13d	366	break;
b950bdd0 BH	367	#endif /* HAS_PPC_PMC_IBM */
	368	#ifdef HAS_PPC_PMC_G4
	369	case PPC_PMC_G4:
	370	attrs = g4_common_attrs;
	371	nattrs = sizeof(g4_common_attrs) / sizeof(struct sysdev_attribute);
	372	pmc_attrs = classic_pmc_attrs;
	373	break;
	374	#endif /* HAS_PPC_PMC_G4 */
	375	#ifdef HAS_PPC_PMC_PA6T
6529c13d OJ	376	case PPC_PMC_PA6T:
	377	/* PA Semi starts counting at PMC0 */
	378	attrs = pa6t_attrs;
	379	nattrs = sizeof(pa6t_attrs) / sizeof(struct sysdev_attribute);
	380	pmc_attrs = NULL;
	381	break;
b950bdd0	382	#endif /* HAS_PPC_PMC_PA6T */
6529c13d OJ	383	default:
	384	attrs = NULL;
	385	nattrs = 0;
	386	pmc_attrs = NULL;
	387	}
	388
	389	for (i = 0; i < nattrs; i++)
	390	sysdev_create_file(s, &attrs[i]);
1da177e4	391
6529c13d OJ	392	if (pmc_attrs)
	393	for (i = 0; i < cur_cpu_spec->num_pmcs; i++)
	394	sysdev_create_file(s, &pmc_attrs[i]);
1da177e4	395
b950bdd0	396	#ifdef CONFIG_PPC64
1da177e4 LT	397	if (cpu_has_feature(CPU_FTR_MMCRA))
	398	sysdev_create_file(s, &attr_mmcra);
	399
afd05423	400	if (cpu_has_feature(CPU_FTR_PURR))
1da177e4	401	sysdev_create_file(s, &attr_purr);
4c198557	402
f050982a AB	403	if (cpu_has_feature(CPU_FTR_SPURR))
	404	sysdev_create_file(s, &attr_spurr);
	405
4c198557 AB	406	if (cpu_has_feature(CPU_FTR_DSCR))
4c198557 AB	407	sysdev_create_file(s, &attr_dscr);
b950bdd0	408	#endif /* CONFIG_PPC64 */
124c27d3	409
93197a36	410	cacheinfo_cpu_online(cpu);
1da177e4 LT	411	}
	412
	413	#ifdef CONFIG_HOTPLUG_CPU
	414	static void unregister_cpu_online(unsigned int cpu)
	415	{
	416	struct cpu *c = &per_cpu(cpu_devices, cpu);
	417	struct sys_device *s = &c->sysdev;
6529c13d OJ	418	struct sysdev_attribute attrs, pmc_attrs;
6529c13d OJ	419	int i, nattrs;
1da177e4	420
72486f1f	421	BUG_ON(!c->hotpluggable);
1da177e4	422
a1e0eb10	423	#ifdef CONFIG_PPC64
ad5cb17f SR	424	if (!firmware_has_feature(FW_FEATURE_ISERIES) &&
ad5cb17f SR	425	cpu_has_feature(CPU_FTR_SMT))
1da177e4	426	sysdev_remove_file(s, &attr_smt_snooze_delay);
a1e0eb10	427	#endif
1da177e4 LT	428
1da177e4 LT	429	/* PMC stuff */
6529c13d	430	switch (cur_cpu_spec->pmc_type) {
b950bdd0	431	#ifdef HAS_PPC_PMC_IBM
6529c13d OJ	432	case PPC_PMC_IBM:
	433	attrs = ibm_common_attrs;
	434	nattrs = sizeof(ibm_common_attrs) / sizeof(struct sysdev_attribute);
b950bdd0 BH	435	pmc_attrs = classic_pmc_attrs;
	436	break;
	437	#endif /* HAS_PPC_PMC_IBM */
	438	#ifdef HAS_PPC_PMC_G4
	439	case PPC_PMC_G4:
	440	attrs = g4_common_attrs;
	441	nattrs = sizeof(g4_common_attrs) / sizeof(struct sysdev_attribute);
	442	pmc_attrs = classic_pmc_attrs;
6529c13d	443	break;
b950bdd0 BH	444	#endif /* HAS_PPC_PMC_G4 */
b950bdd0 BH	445	#ifdef HAS_PPC_PMC_PA6T
6529c13d OJ	446	case PPC_PMC_PA6T:
	447	/* PA Semi starts counting at PMC0 */
	448	attrs = pa6t_attrs;
	449	nattrs = sizeof(pa6t_attrs) / sizeof(struct sysdev_attribute);
	450	pmc_attrs = NULL;
	451	break;
b950bdd0	452	#endif /* HAS_PPC_PMC_PA6T */
6529c13d OJ	453	default:
	454	attrs = NULL;
	455	nattrs = 0;
	456	pmc_attrs = NULL;
	457	}
1da177e4	458
6529c13d OJ	459	for (i = 0; i < nattrs; i++)
	460	sysdev_remove_file(s, &attrs[i]);
	461
	462	if (pmc_attrs)
	463	for (i = 0; i < cur_cpu_spec->num_pmcs; i++)
	464	sysdev_remove_file(s, &pmc_attrs[i]);
1da177e4	465
b950bdd0	466	#ifdef CONFIG_PPC64
1da177e4 LT	467	if (cpu_has_feature(CPU_FTR_MMCRA))
	468	sysdev_remove_file(s, &attr_mmcra);
	469
afd05423	470	if (cpu_has_feature(CPU_FTR_PURR))
1da177e4	471	sysdev_remove_file(s, &attr_purr);
4c198557	472
f050982a AB	473	if (cpu_has_feature(CPU_FTR_SPURR))
	474	sysdev_remove_file(s, &attr_spurr);
	475
4c198557 AB	476	if (cpu_has_feature(CPU_FTR_DSCR))
4c198557 AB	477	sysdev_remove_file(s, &attr_dscr);
b950bdd0	478	#endif /* CONFIG_PPC64 */
124c27d3	479
93197a36	480	cacheinfo_cpu_offline(cpu);
1da177e4 LT	481	}
	482	#endif /* CONFIG_HOTPLUG_CPU */
	483
8c78f307	484	static int __cpuinit sysfs_cpu_notify(struct notifier_block *self,
1da177e4 LT	485	unsigned long action, void *hcpu)
	486	{
	487	unsigned int cpu = (unsigned int)(long)hcpu;
	488
	489	switch (action) {
	490	case CPU_ONLINE:
8bb78442	491	case CPU_ONLINE_FROZEN:
1da177e4 LT	492	register_cpu_online(cpu);
	493	break;
	494	#ifdef CONFIG_HOTPLUG_CPU
	495	case CPU_DEAD:
8bb78442	496	case CPU_DEAD_FROZEN:
1da177e4 LT	497	unregister_cpu_online(cpu);
	498	break;
	499	#endif
	500	}
	501	return NOTIFY_OK;
	502	}
	503
8c78f307	504	static struct notifier_block __cpuinitdata sysfs_cpu_nb = {
1da177e4 LT	505	.notifier_call = sysfs_cpu_notify,
	506	};
	507
0344c6c5 CK	508	static DEFINE_MUTEX(cpu_mutex);
	509
	510	int cpu_add_sysdev_attr(struct sysdev_attribute *attr)
	511	{
	512	int cpu;
	513
	514	mutex_lock(&cpu_mutex);
	515
	516	for_each_possible_cpu(cpu) {
	517	sysdev_create_file(get_cpu_sysdev(cpu), attr);
	518	}
	519
	520	mutex_unlock(&cpu_mutex);
	521	return 0;
	522	}
	523	EXPORT_SYMBOL_GPL(cpu_add_sysdev_attr);
	524
	525	int cpu_add_sysdev_attr_group(struct attribute_group *attrs)
	526	{
	527	int cpu;
	528	struct sys_device *sysdev;
6bcc4c01	529	int ret;
0344c6c5 CK	530
	531	mutex_lock(&cpu_mutex);
	532
	533	for_each_possible_cpu(cpu) {
	534	sysdev = get_cpu_sysdev(cpu);
6bcc4c01 OJ	535	ret = sysfs_create_group(&sysdev->kobj, attrs);
6bcc4c01 OJ	536	WARN_ON(ret != 0);
0344c6c5 CK	537	}
	538
	539	mutex_unlock(&cpu_mutex);
	540	return 0;
	541	}
	542	EXPORT_SYMBOL_GPL(cpu_add_sysdev_attr_group);
	543
	544
	545	void cpu_remove_sysdev_attr(struct sysdev_attribute *attr)
	546	{
	547	int cpu;
	548
	549	mutex_lock(&cpu_mutex);
	550
	551	for_each_possible_cpu(cpu) {
	552	sysdev_remove_file(get_cpu_sysdev(cpu), attr);
	553	}
	554
	555	mutex_unlock(&cpu_mutex);
	556	}
	557	EXPORT_SYMBOL_GPL(cpu_remove_sysdev_attr);
	558
	559	void cpu_remove_sysdev_attr_group(struct attribute_group *attrs)
	560	{
	561	int cpu;
	562	struct sys_device *sysdev;
	563
	564	mutex_lock(&cpu_mutex);
	565
	566	for_each_possible_cpu(cpu) {
	567	sysdev = get_cpu_sysdev(cpu);
	568	sysfs_remove_group(&sysdev->kobj, attrs);
	569	}
	570
	571	mutex_unlock(&cpu_mutex);
	572	}
	573	EXPORT_SYMBOL_GPL(cpu_remove_sysdev_attr_group);
	574
	575
1da177e4 LT	576	/* NUMA stuff */
	577
	578	#ifdef CONFIG_NUMA
1da177e4 LT	579	static void register_nodes(void)
	580	{
	581	int i;
	582
0fc44159 YG	583	for (i = 0; i < MAX_NUMNODES; i++)
0fc44159 YG	584	register_one_node(i);
1da177e4	585	}
953039c8 JK	586
	587	int sysfs_add_device_to_node(struct sys_device *dev, int nid)
	588	{
	589	struct node *node = &node_devices[nid];
	590	return sysfs_create_link(&node->sysdev.kobj, &dev->kobj,
	591	kobject_name(&dev->kobj));
	592	}
12654f77	593	EXPORT_SYMBOL_GPL(sysfs_add_device_to_node);
953039c8 JK	594
	595	void sysfs_remove_device_from_node(struct sys_device *dev, int nid)
	596	{
	597	struct node *node = &node_devices[nid];
	598	sysfs_remove_link(&node->sysdev.kobj, kobject_name(&dev->kobj));
	599	}
12654f77	600	EXPORT_SYMBOL_GPL(sysfs_remove_device_from_node);
953039c8	601
1da177e4 LT	602	#else
	603	static void register_nodes(void)
	604	{
	605	return;
	606	}
953039c8	607
1da177e4 LT	608	#endif
	609
	610	/* Only valid if CPU is present. */
00bf6e90 SR	611	static ssize_t show_physical_id(struct sys_device *dev,
00bf6e90 SR	612	struct sysdev_attribute attr, char buf)
1da177e4 LT	613	{
	614	struct cpu *cpu = container_of(dev, struct cpu, sysdev);
	615
	616	return sprintf(buf, "%d\n", get_hard_smp_processor_id(cpu->sysdev.id));
	617	}
	618	static SYSDEV_ATTR(physical_id, 0444, show_physical_id, NULL);
	619
	620	static int __init topology_init(void)
	621	{
	622	int cpu;
1da177e4 LT	623
1da177e4 LT	624	register_nodes();
1da177e4 LT	625	register_cpu_notifier(&sysfs_cpu_nb);
1da177e4 LT	626
0e551954	627	for_each_possible_cpu(cpu) {
1da177e4 LT	628	struct cpu *c = &per_cpu(cpu_devices, cpu);
1da177e4 LT	629
1da177e4 LT	630	/*
	631	* For now, we just see if the system supports making
	632	* the RTAS calls for CPU hotplug. But, there may be a
	633	* more comprehensive way to do this for an individual
	634	* CPU. For instance, the boot cpu might never be valid
	635	* for hotplugging.
	636	*/
72486f1f SS	637	if (ppc_md.cpu_die)
72486f1f SS	638	c->hotpluggable = 1;
1da177e4	639
72486f1f	640	if (cpu_online(cpu) \|\| c->hotpluggable) {
76b67ed9	641	register_cpu(c, cpu);
1da177e4 LT	642
	643	sysdev_create_file(&c->sysdev, &attr_physical_id);
	644	}
	645
	646	if (cpu_online(cpu))
	647	register_cpu_online(cpu);
	648	}
	649
	650	return 0;
	651	}
e9e77ce8	652	subsys_initcall(topology_init);