[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/paca.h>
#include <asm/lppaca.h>
#include <asm/machdep.h>
#include <asm/smp.h>

static DEFINE_PER_CPU(struct cpu, cpu_devices);

/* SMT stuff */

#ifdef CONFIG_PPC_MULTIPLATFORM
/* 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, 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, 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_PPC_MULTIPLATFORM */

/*
 * 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 ppc64_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(ppc64_enable_pmcs);

/* 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;
}

#define SYSFS_PMCSETUP(NAME, ADDRESS) \
static unsigned long read_##NAME(unsigned long junk) \
{ \
	return mfspr(ADDRESS); \
} \
static unsigned long write_##NAME(unsigned long val) \
{ \
	ppc64_enable_pmcs(); \
	mtspr(ADDRESS, val); \
	return 0; \
} \
static ssize_t show_##NAME(struct sys_device *dev, 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 __attribute_used__ \
	store_##NAME(struct sys_device *dev, 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
 */

SYSFS_PMCSETUP(mmcr0, SPRN_MMCR0);
SYSFS_PMCSETUP(mmcr1, SPRN_MMCR1);
SYSFS_PMCSETUP(mmcra, SPRN_MMCRA);
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);
SYSFS_PMCSETUP(pmc7, SPRN_PMC7);
SYSFS_PMCSETUP(pmc8, SPRN_PMC8);
SYSFS_PMCSETUP(purr, SPRN_PURR);
SYSFS_PMCSETUP(spurr, SPRN_SPURR);
SYSFS_PMCSETUP(dscr, SPRN_DSCR);

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);


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);

static struct sysdev_attribute ibm_common_attrs[] = {
	_SYSDEV_ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0),
	_SYSDEV_ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1),
};

static struct sysdev_attribute ibm_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),
	_SYSDEV_ATTR(pmc7, 0600, show_pmc7, store_pmc7),
	_SYSDEV_ATTR(pmc8, 0600, show_pmc8, store_pmc8),
};

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),
};


static void 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;

	if (!firmware_has_feature(FW_FEATURE_ISERIES) &&
			cpu_has_feature(CPU_FTR_SMT))
		sysdev_create_file(s, &attr_smt_snooze_delay);

	/* PMC stuff */
	switch (cur_cpu_spec->pmc_type) {
	case PPC_PMC_IBM:
		attrs = ibm_common_attrs;
		nattrs = sizeof(ibm_common_attrs) / sizeof(struct sysdev_attribute);
		pmc_attrs = ibm_pmc_attrs;
		break;
	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;
	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]);

	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);
}

#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);

	if (!firmware_has_feature(FW_FEATURE_ISERIES) &&
			cpu_has_feature(CPU_FTR_SMT))
		sysdev_remove_file(s, &attr_smt_snooze_delay);

	/* PMC stuff */
	switch (cur_cpu_spec->pmc_type) {
	case PPC_PMC_IBM:
		attrs = ibm_common_attrs;
		nattrs = sizeof(ibm_common_attrs) / sizeof(struct sysdev_attribute);
		pmc_attrs = ibm_pmc_attrs;
		break;
	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;
	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]);

	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_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:
		register_cpu_online(cpu);
		break;
#ifdef CONFIG_HOTPLUG_CPU
	case CPU_DEAD:
		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;

	mutex_lock(&cpu_mutex);

	for_each_possible_cpu(cpu) {
		sysdev = get_cpu_sysdev(cpu);
		sysfs_create_group(&sysdev->kobj, attrs);
	}

	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));
}

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));
}

#else
static void register_nodes(void)
{
	return;
}

#endif

EXPORT_SYMBOL_GPL(sysfs_add_device_to_node);
EXPORT_SYMBOL_GPL(sysfs_remove_device_from_node);

/* Only valid if CPU is present. */
static ssize_t show_physical_id(struct sys_device *dev, 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;
}
__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 LT	18	#include <asm/paca.h>
	19	#include <asm/lppaca.h>
	20	#include <asm/machdep.h>
2249ca9d	21	#include <asm/smp.h>
1da177e4 LT	22
	23	static DEFINE_PER_CPU(struct cpu, cpu_devices);
	24
	25	/* SMT stuff */
	26
	27	#ifdef CONFIG_PPC_MULTIPLATFORM
0ddd3e7d AB	28	/* Time in microseconds we delay before sleeping in the idle loop */
0ddd3e7d AB	29	DEFINE_PER_CPU(unsigned long, smt_snooze_delay) = { 100 };
1da177e4 LT	30
	31	static ssize_t store_smt_snooze_delay(struct sys_device dev, const char buf,
	32	size_t count)
	33	{
	34	struct cpu *cpu = container_of(dev, struct cpu, sysdev);
	35	ssize_t ret;
	36	unsigned long snooze;
	37
	38	ret = sscanf(buf, "%lu", &snooze);
	39	if (ret != 1)
	40	return -EINVAL;
	41
	42	per_cpu(smt_snooze_delay, cpu->sysdev.id) = snooze;
	43
	44	return count;
	45	}
	46
	47	static ssize_t show_smt_snooze_delay(struct sys_device dev, char buf)
	48	{
	49	struct cpu *cpu = container_of(dev, struct cpu, sysdev);
	50
	51	return sprintf(buf, "%lu\n", per_cpu(smt_snooze_delay, cpu->sysdev.id));
	52	}
	53
	54	static SYSDEV_ATTR(smt_snooze_delay, 0644, show_smt_snooze_delay,
	55	store_smt_snooze_delay);
	56
	57	/* Only parse OF options if the matching cmdline option was not specified */
	58	static int smt_snooze_cmdline;
	59
	60	static int __init smt_setup(void)
	61	{
	62	struct device_node *options;
a7f67bdf	63	const unsigned int *val;
1da177e4 LT	64	unsigned int cpu;
	65
	66	if (!cpu_has_feature(CPU_FTR_SMT))
69ed3324	67	return -ENODEV;
1da177e4	68
8c8dc322	69	options = of_find_node_by_path("/options");
1da177e4	70	if (!options)
69ed3324	71	return -ENODEV;
1da177e4	72
e2eb6392	73	val = of_get_property(options, "ibm,smt-snooze-delay", NULL);
1da177e4	74	if (!smt_snooze_cmdline && val) {
0e551954	75	for_each_possible_cpu(cpu)
1da177e4 LT	76	per_cpu(smt_snooze_delay, cpu) = *val;
	77	}
	78
8c8dc322	79	of_node_put(options);
69ed3324	80	return 0;
1da177e4 LT	81	}
	82	__initcall(smt_setup);
	83
	84	static int __init setup_smt_snooze_delay(char *str)
	85	{
	86	unsigned int cpu;
	87	int snooze;
	88
	89	if (!cpu_has_feature(CPU_FTR_SMT))
	90	return 1;
	91
	92	smt_snooze_cmdline = 1;
	93
	94	if (get_option(&str, &snooze)) {
0e551954	95	for_each_possible_cpu(cpu)
1da177e4 LT	96	per_cpu(smt_snooze_delay, cpu) = snooze;
	97	}
	98
	99	return 1;
	100	}
	101	__setup("smt-snooze-delay=", setup_smt_snooze_delay);
	102
180a3362 ME	103	#endif /* CONFIG_PPC_MULTIPLATFORM */
180a3362 ME	104
1da177e4 LT	105	/*
	106	* Enabling PMCs will slow partition context switch times so we only do
	107	* it the first time we write to the PMCs.
	108	*/
	109
	110	static DEFINE_PER_CPU(char, pmcs_enabled);
	111
	112	void ppc64_enable_pmcs(void)
	113	{
1da177e4 LT	114	/* Only need to enable them once */
	115	if (__get_cpu_var(pmcs_enabled))
	116	return;
	117
	118	__get_cpu_var(pmcs_enabled) = 1;
	119
180a3362 ME	120	if (ppc_md.enable_pmcs)
180a3362 ME	121	ppc_md.enable_pmcs();
1da177e4	122	}
1da177e4 LT	123	EXPORT_SYMBOL(ppc64_enable_pmcs);
	124
	125	/* XXX convert to rusty's on_one_cpu */
	126	static unsigned long run_on_cpu(unsigned long cpu,
	127	unsigned long (*func)(unsigned long),
	128	unsigned long arg)
	129	{
	130	cpumask_t old_affinity = current->cpus_allowed;
	131	unsigned long ret;
	132
	133	/* should return -EINVAL to userspace */
	134	if (set_cpus_allowed(current, cpumask_of_cpu(cpu)))
	135	return 0;
	136
	137	ret = func(arg);
	138
	139	set_cpus_allowed(current, old_affinity);
	140
	141	return ret;
	142	}
	143
	144	#define SYSFS_PMCSETUP(NAME, ADDRESS) \
	145	static unsigned long read_##NAME(unsigned long junk) \
	146	{ \
	147	return mfspr(ADDRESS); \
	148	} \
	149	static unsigned long write_##NAME(unsigned long val) \
	150	{ \
	151	ppc64_enable_pmcs(); \
	152	mtspr(ADDRESS, val); \
	153	return 0; \
	154	} \
	155	static ssize_t show_##NAME(struct sys_device dev, char buf) \
	156	{ \
	157	struct cpu *cpu = container_of(dev, struct cpu, sysdev); \
	158	unsigned long val = run_on_cpu(cpu->sysdev.id, read_##NAME, 0); \
	159	return sprintf(buf, "%lx\n", val); \
	160	} \
	161	static ssize_t __attribute_used__ \
	162	store_##NAME(struct sys_device dev, const char buf, size_t count) \
	163	{ \
	164	struct cpu *cpu = container_of(dev, struct cpu, sysdev); \
	165	unsigned long val; \
	166	int ret = sscanf(buf, "%lx", &val); \
	167	if (ret != 1) \
	168	return -EINVAL; \
	169	run_on_cpu(cpu->sysdev.id, write_##NAME, val); \
	170	return count; \
	171	}
	172
6529c13d OJ	173
	174	/* Let's define all possible registers, we'll only hook up the ones
	175	* that are implemented on the current processor
	176	*/
	177
1da177e4 LT	178	SYSFS_PMCSETUP(mmcr0, SPRN_MMCR0);
	179	SYSFS_PMCSETUP(mmcr1, SPRN_MMCR1);
	180	SYSFS_PMCSETUP(mmcra, SPRN_MMCRA);
	181	SYSFS_PMCSETUP(pmc1, SPRN_PMC1);
	182	SYSFS_PMCSETUP(pmc2, SPRN_PMC2);
	183	SYSFS_PMCSETUP(pmc3, SPRN_PMC3);
	184	SYSFS_PMCSETUP(pmc4, SPRN_PMC4);
	185	SYSFS_PMCSETUP(pmc5, SPRN_PMC5);
	186	SYSFS_PMCSETUP(pmc6, SPRN_PMC6);
	187	SYSFS_PMCSETUP(pmc7, SPRN_PMC7);
	188	SYSFS_PMCSETUP(pmc8, SPRN_PMC8);
	189	SYSFS_PMCSETUP(purr, SPRN_PURR);
f050982a	190	SYSFS_PMCSETUP(spurr, SPRN_SPURR);
4c198557	191	SYSFS_PMCSETUP(dscr, SPRN_DSCR);
1da177e4	192
25fc530e OJ	193	SYSFS_PMCSETUP(pa6t_pmc0, SPRN_PA6T_PMC0);
	194	SYSFS_PMCSETUP(pa6t_pmc1, SPRN_PA6T_PMC1);
	195	SYSFS_PMCSETUP(pa6t_pmc2, SPRN_PA6T_PMC2);
	196	SYSFS_PMCSETUP(pa6t_pmc3, SPRN_PA6T_PMC3);
	197	SYSFS_PMCSETUP(pa6t_pmc4, SPRN_PA6T_PMC4);
	198	SYSFS_PMCSETUP(pa6t_pmc5, SPRN_PA6T_PMC5);
6529c13d OJ	199
6529c13d OJ	200
1da177e4	201	static SYSDEV_ATTR(mmcra, 0600, show_mmcra, store_mmcra);
f050982a	202	static SYSDEV_ATTR(spurr, 0600, show_spurr, NULL);
4c198557	203	static SYSDEV_ATTR(dscr, 0600, show_dscr, store_dscr);
6529c13d OJ	204	static SYSDEV_ATTR(purr, 0600, show_purr, store_purr);
	205
	206	static struct sysdev_attribute ibm_common_attrs[] = {
	207	_SYSDEV_ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0),
	208	_SYSDEV_ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1),
	209	};
	210
	211	static struct sysdev_attribute ibm_pmc_attrs[] = {
	212	_SYSDEV_ATTR(pmc1, 0600, show_pmc1, store_pmc1),
	213	_SYSDEV_ATTR(pmc2, 0600, show_pmc2, store_pmc2),
	214	_SYSDEV_ATTR(pmc3, 0600, show_pmc3, store_pmc3),
	215	_SYSDEV_ATTR(pmc4, 0600, show_pmc4, store_pmc4),
	216	_SYSDEV_ATTR(pmc5, 0600, show_pmc5, store_pmc5),
	217	_SYSDEV_ATTR(pmc6, 0600, show_pmc6, store_pmc6),
	218	_SYSDEV_ATTR(pmc7, 0600, show_pmc7, store_pmc7),
	219	_SYSDEV_ATTR(pmc8, 0600, show_pmc8, store_pmc8),
	220	};
	221
	222	static struct sysdev_attribute pa6t_attrs[] = {
	223	_SYSDEV_ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0),
	224	_SYSDEV_ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1),
	225	_SYSDEV_ATTR(pmc0, 0600, show_pa6t_pmc0, store_pa6t_pmc0),
	226	_SYSDEV_ATTR(pmc1, 0600, show_pa6t_pmc1, store_pa6t_pmc1),
	227	_SYSDEV_ATTR(pmc2, 0600, show_pa6t_pmc2, store_pa6t_pmc2),
	228	_SYSDEV_ATTR(pmc3, 0600, show_pa6t_pmc3, store_pa6t_pmc3),
	229	_SYSDEV_ATTR(pmc4, 0600, show_pa6t_pmc4, store_pa6t_pmc4),
	230	_SYSDEV_ATTR(pmc5, 0600, show_pa6t_pmc5, store_pa6t_pmc5),
	231	};
	232
1da177e4 LT	233
	234	static void register_cpu_online(unsigned int cpu)
	235	{
	236	struct cpu *c = &per_cpu(cpu_devices, cpu);
	237	struct sys_device *s = &c->sysdev;
6529c13d OJ	238	struct sysdev_attribute attrs, pmc_attrs;
6529c13d OJ	239	int i, nattrs;
1da177e4	240
ad5cb17f SR	241	if (!firmware_has_feature(FW_FEATURE_ISERIES) &&
ad5cb17f SR	242	cpu_has_feature(CPU_FTR_SMT))
1da177e4	243	sysdev_create_file(s, &attr_smt_snooze_delay);
1da177e4 LT	244
1da177e4 LT	245	/* PMC stuff */
6529c13d OJ	246	switch (cur_cpu_spec->pmc_type) {
	247	case PPC_PMC_IBM:
	248	attrs = ibm_common_attrs;
	249	nattrs = sizeof(ibm_common_attrs) / sizeof(struct sysdev_attribute);
	250	pmc_attrs = ibm_pmc_attrs;
	251	break;
	252	case PPC_PMC_PA6T:
	253	/* PA Semi starts counting at PMC0 */
	254	attrs = pa6t_attrs;
	255	nattrs = sizeof(pa6t_attrs) / sizeof(struct sysdev_attribute);
	256	pmc_attrs = NULL;
	257	break;
	258	default:
	259	attrs = NULL;
	260	nattrs = 0;
	261	pmc_attrs = NULL;
	262	}
	263
	264	for (i = 0; i < nattrs; i++)
	265	sysdev_create_file(s, &attrs[i]);
1da177e4	266
6529c13d OJ	267	if (pmc_attrs)
	268	for (i = 0; i < cur_cpu_spec->num_pmcs; i++)
	269	sysdev_create_file(s, &pmc_attrs[i]);
1da177e4 LT	270
	271	if (cpu_has_feature(CPU_FTR_MMCRA))
	272	sysdev_create_file(s, &attr_mmcra);
	273
afd05423	274	if (cpu_has_feature(CPU_FTR_PURR))
1da177e4	275	sysdev_create_file(s, &attr_purr);
4c198557	276
f050982a AB	277	if (cpu_has_feature(CPU_FTR_SPURR))
	278	sysdev_create_file(s, &attr_spurr);
	279
4c198557 AB	280	if (cpu_has_feature(CPU_FTR_DSCR))
4c198557 AB	281	sysdev_create_file(s, &attr_dscr);
1da177e4 LT	282	}
	283
	284	#ifdef CONFIG_HOTPLUG_CPU
	285	static void unregister_cpu_online(unsigned int cpu)
	286	{
	287	struct cpu *c = &per_cpu(cpu_devices, cpu);
	288	struct sys_device *s = &c->sysdev;
6529c13d OJ	289	struct sysdev_attribute attrs, pmc_attrs;
6529c13d OJ	290	int i, nattrs;
1da177e4	291
72486f1f	292	BUG_ON(!c->hotpluggable);
1da177e4	293
ad5cb17f SR	294	if (!firmware_has_feature(FW_FEATURE_ISERIES) &&
ad5cb17f SR	295	cpu_has_feature(CPU_FTR_SMT))
1da177e4	296	sysdev_remove_file(s, &attr_smt_snooze_delay);
1da177e4 LT	297
1da177e4 LT	298	/* PMC stuff */
6529c13d OJ	299	switch (cur_cpu_spec->pmc_type) {
	300	case PPC_PMC_IBM:
	301	attrs = ibm_common_attrs;
	302	nattrs = sizeof(ibm_common_attrs) / sizeof(struct sysdev_attribute);
	303	pmc_attrs = ibm_pmc_attrs;
	304	break;
	305	case PPC_PMC_PA6T:
	306	/* PA Semi starts counting at PMC0 */
	307	attrs = pa6t_attrs;
	308	nattrs = sizeof(pa6t_attrs) / sizeof(struct sysdev_attribute);
	309	pmc_attrs = NULL;
	310	break;
	311	default:
	312	attrs = NULL;
	313	nattrs = 0;
	314	pmc_attrs = NULL;
	315	}
1da177e4	316
6529c13d OJ	317	for (i = 0; i < nattrs; i++)
	318	sysdev_remove_file(s, &attrs[i]);
	319
	320	if (pmc_attrs)
	321	for (i = 0; i < cur_cpu_spec->num_pmcs; i++)
	322	sysdev_remove_file(s, &pmc_attrs[i]);
1da177e4 LT	323
	324	if (cpu_has_feature(CPU_FTR_MMCRA))
	325	sysdev_remove_file(s, &attr_mmcra);
	326
afd05423	327	if (cpu_has_feature(CPU_FTR_PURR))
1da177e4	328	sysdev_remove_file(s, &attr_purr);
4c198557	329
f050982a AB	330	if (cpu_has_feature(CPU_FTR_SPURR))
	331	sysdev_remove_file(s, &attr_spurr);
	332
4c198557 AB	333	if (cpu_has_feature(CPU_FTR_DSCR))
4c198557 AB	334	sysdev_remove_file(s, &attr_dscr);
1da177e4 LT	335	}
	336	#endif /* CONFIG_HOTPLUG_CPU */
	337
8c78f307	338	static int __cpuinit sysfs_cpu_notify(struct notifier_block *self,
1da177e4 LT	339	unsigned long action, void *hcpu)
	340	{
	341	unsigned int cpu = (unsigned int)(long)hcpu;
	342
	343	switch (action) {
	344	case CPU_ONLINE:
	345	register_cpu_online(cpu);
	346	break;
	347	#ifdef CONFIG_HOTPLUG_CPU
	348	case CPU_DEAD:
	349	unregister_cpu_online(cpu);
	350	break;
	351	#endif
	352	}
	353	return NOTIFY_OK;
	354	}
	355
8c78f307	356	static struct notifier_block __cpuinitdata sysfs_cpu_nb = {
1da177e4 LT	357	.notifier_call = sysfs_cpu_notify,
	358	};
	359
0344c6c5 CK	360	static DEFINE_MUTEX(cpu_mutex);
	361
	362	int cpu_add_sysdev_attr(struct sysdev_attribute *attr)
	363	{
	364	int cpu;
	365
	366	mutex_lock(&cpu_mutex);
	367
	368	for_each_possible_cpu(cpu) {
	369	sysdev_create_file(get_cpu_sysdev(cpu), attr);
	370	}
	371
	372	mutex_unlock(&cpu_mutex);
	373	return 0;
	374	}
	375	EXPORT_SYMBOL_GPL(cpu_add_sysdev_attr);
	376
	377	int cpu_add_sysdev_attr_group(struct attribute_group *attrs)
	378	{
	379	int cpu;
	380	struct sys_device *sysdev;
	381
	382	mutex_lock(&cpu_mutex);
	383
	384	for_each_possible_cpu(cpu) {
	385	sysdev = get_cpu_sysdev(cpu);
	386	sysfs_create_group(&sysdev->kobj, attrs);
	387	}
	388
	389	mutex_unlock(&cpu_mutex);
	390	return 0;
	391	}
	392	EXPORT_SYMBOL_GPL(cpu_add_sysdev_attr_group);
	393
	394
	395	void cpu_remove_sysdev_attr(struct sysdev_attribute *attr)
	396	{
	397	int cpu;
	398
	399	mutex_lock(&cpu_mutex);
	400
	401	for_each_possible_cpu(cpu) {
	402	sysdev_remove_file(get_cpu_sysdev(cpu), attr);
	403	}
	404
	405	mutex_unlock(&cpu_mutex);
	406	}
	407	EXPORT_SYMBOL_GPL(cpu_remove_sysdev_attr);
	408
	409	void cpu_remove_sysdev_attr_group(struct attribute_group *attrs)
	410	{
	411	int cpu;
	412	struct sys_device *sysdev;
	413
	414	mutex_lock(&cpu_mutex);
	415
	416	for_each_possible_cpu(cpu) {
	417	sysdev = get_cpu_sysdev(cpu);
	418	sysfs_remove_group(&sysdev->kobj, attrs);
	419	}
	420
	421	mutex_unlock(&cpu_mutex);
	422	}
	423	EXPORT_SYMBOL_GPL(cpu_remove_sysdev_attr_group);
424
425
1da177e4 LT	426	/* NUMA stuff */
	427
	428	#ifdef CONFIG_NUMA
1da177e4 LT	429	static void register_nodes(void)
	430	{
	431	int i;
	432
0fc44159 YG	433	for (i = 0; i < MAX_NUMNODES; i++)
0fc44159 YG	434	register_one_node(i);
1da177e4	435	}
953039c8 JK	436
	437	int sysfs_add_device_to_node(struct sys_device *dev, int nid)
	438	{
	439	struct node *node = &node_devices[nid];
	440	return sysfs_create_link(&node->sysdev.kobj, &dev->kobj,
	441	kobject_name(&dev->kobj));
	442	}
	443
	444	void sysfs_remove_device_from_node(struct sys_device *dev, int nid)
	445	{
	446	struct node *node = &node_devices[nid];
	447	sysfs_remove_link(&node->sysdev.kobj, kobject_name(&dev->kobj));
	448	}
	449
1da177e4 LT	450	#else
	451	static void register_nodes(void)
	452	{
	453	return;
	454	}
953039c8	455
1da177e4 LT	456	#endif
1da177e4 LT	457
953039c8 JK	458	EXPORT_SYMBOL_GPL(sysfs_add_device_to_node);
	459	EXPORT_SYMBOL_GPL(sysfs_remove_device_from_node);
	460
1da177e4 LT	461	/* Only valid if CPU is present. */
	462	static ssize_t show_physical_id(struct sys_device dev, char buf)
	463	{
	464	struct cpu *cpu = container_of(dev, struct cpu, sysdev);
	465
	466	return sprintf(buf, "%d\n", get_hard_smp_processor_id(cpu->sysdev.id));
	467	}
	468	static SYSDEV_ATTR(physical_id, 0444, show_physical_id, NULL);
	469
	470	static int __init topology_init(void)
	471	{
	472	int cpu;
1da177e4 LT	473
1da177e4 LT	474	register_nodes();
1da177e4 LT	475	register_cpu_notifier(&sysfs_cpu_nb);
1da177e4 LT	476
0e551954	477	for_each_possible_cpu(cpu) {
1da177e4 LT	478	struct cpu *c = &per_cpu(cpu_devices, cpu);
1da177e4 LT	479
1da177e4 LT	480	/*
	481	* For now, we just see if the system supports making
	482	* the RTAS calls for CPU hotplug. But, there may be a
	483	* more comprehensive way to do this for an individual
	484	* CPU. For instance, the boot cpu might never be valid
	485	* for hotplugging.
	486	*/
72486f1f SS	487	if (ppc_md.cpu_die)
72486f1f SS	488	c->hotpluggable = 1;
1da177e4	489
72486f1f	490	if (cpu_online(cpu) \|\| c->hotpluggable) {
76b67ed9	491	register_cpu(c, cpu);
1da177e4 LT	492
	493	sysdev_create_file(&c->sysdev, &attr_physical_id);
	494	}
	495
	496	if (cpu_online(cpu))
	497	register_cpu_online(cpu);
	498	}
	499
	500	return 0;
	501	}
	502	__initcall(topology_init);