[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 = find_path_device("/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;
	}

	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, PA6T_SPRN_PMC0);
SYSFS_PMCSETUP(pa6t_pmc1, PA6T_SPRN_PMC1);
SYSFS_PMCSETUP(pa6t_pmc2, PA6T_SPRN_PMC2);
SYSFS_PMCSETUP(pa6t_pmc3, PA6T_SPRN_PMC3);
SYSFS_PMCSETUP(pa6t_pmc4, PA6T_SPRN_PMC4);
SYSFS_PMCSETUP(pa6t_pmc5, PA6T_SPRN_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 LT	68
	69	options = find_path_device("/options");
	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
69ed3324	79	return 0;
1da177e4 LT	80	}
	81	__initcall(smt_setup);
	82
	83	static int __init setup_smt_snooze_delay(char *str)
	84	{
	85	unsigned int cpu;
	86	int snooze;
	87
	88	if (!cpu_has_feature(CPU_FTR_SMT))
	89	return 1;
	90
	91	smt_snooze_cmdline = 1;
	92
	93	if (get_option(&str, &snooze)) {
0e551954	94	for_each_possible_cpu(cpu)
1da177e4 LT	95	per_cpu(smt_snooze_delay, cpu) = snooze;
	96	}
	97
	98	return 1;
	99	}
	100	__setup("smt-snooze-delay=", setup_smt_snooze_delay);
	101
180a3362 ME	102	#endif /* CONFIG_PPC_MULTIPLATFORM */
180a3362 ME	103
1da177e4 LT	104	/*
	105	* Enabling PMCs will slow partition context switch times so we only do
	106	* it the first time we write to the PMCs.
	107	*/
	108
	109	static DEFINE_PER_CPU(char, pmcs_enabled);
	110
	111	void ppc64_enable_pmcs(void)
	112	{
1da177e4 LT	113	/* Only need to enable them once */
	114	if (__get_cpu_var(pmcs_enabled))
	115	return;
	116
	117	__get_cpu_var(pmcs_enabled) = 1;
	118
180a3362 ME	119	if (ppc_md.enable_pmcs)
180a3362 ME	120	ppc_md.enable_pmcs();
1da177e4	121	}
1da177e4 LT	122	EXPORT_SYMBOL(ppc64_enable_pmcs);
	123
	124	/* XXX convert to rusty's on_one_cpu */
	125	static unsigned long run_on_cpu(unsigned long cpu,
	126	unsigned long (*func)(unsigned long),
	127	unsigned long arg)
	128	{
	129	cpumask_t old_affinity = current->cpus_allowed;
	130	unsigned long ret;
	131
	132	/* should return -EINVAL to userspace */
	133	if (set_cpus_allowed(current, cpumask_of_cpu(cpu)))
	134	return 0;
	135
	136	ret = func(arg);
	137
	138	set_cpus_allowed(current, old_affinity);
	139
	140	return ret;
	141	}
	142
	143	#define SYSFS_PMCSETUP(NAME, ADDRESS) \
	144	static unsigned long read_##NAME(unsigned long junk) \
	145	{ \
	146	return mfspr(ADDRESS); \
	147	} \
	148	static unsigned long write_##NAME(unsigned long val) \
	149	{ \
	150	ppc64_enable_pmcs(); \
	151	mtspr(ADDRESS, val); \
	152	return 0; \
	153	} \
	154	static ssize_t show_##NAME(struct sys_device dev, char buf) \
	155	{ \
	156	struct cpu *cpu = container_of(dev, struct cpu, sysdev); \
	157	unsigned long val = run_on_cpu(cpu->sysdev.id, read_##NAME, 0); \
	158	return sprintf(buf, "%lx\n", val); \
	159	} \
	160	static ssize_t __attribute_used__ \
	161	store_##NAME(struct sys_device dev, const char buf, size_t count) \
	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; \
	168	run_on_cpu(cpu->sysdev.id, write_##NAME, val); \
	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
1da177e4 LT	177	SYSFS_PMCSETUP(mmcr0, SPRN_MMCR0);
	178	SYSFS_PMCSETUP(mmcr1, SPRN_MMCR1);
	179	SYSFS_PMCSETUP(mmcra, SPRN_MMCRA);
	180	SYSFS_PMCSETUP(pmc1, SPRN_PMC1);
	181	SYSFS_PMCSETUP(pmc2, SPRN_PMC2);
	182	SYSFS_PMCSETUP(pmc3, SPRN_PMC3);
	183	SYSFS_PMCSETUP(pmc4, SPRN_PMC4);
	184	SYSFS_PMCSETUP(pmc5, SPRN_PMC5);
	185	SYSFS_PMCSETUP(pmc6, SPRN_PMC6);
	186	SYSFS_PMCSETUP(pmc7, SPRN_PMC7);
	187	SYSFS_PMCSETUP(pmc8, SPRN_PMC8);
	188	SYSFS_PMCSETUP(purr, SPRN_PURR);
f050982a	189	SYSFS_PMCSETUP(spurr, SPRN_SPURR);
4c198557	190	SYSFS_PMCSETUP(dscr, SPRN_DSCR);
1da177e4	191
6529c13d OJ	192	SYSFS_PMCSETUP(pa6t_pmc0, PA6T_SPRN_PMC0);
	193	SYSFS_PMCSETUP(pa6t_pmc1, PA6T_SPRN_PMC1);
	194	SYSFS_PMCSETUP(pa6t_pmc2, PA6T_SPRN_PMC2);
	195	SYSFS_PMCSETUP(pa6t_pmc3, PA6T_SPRN_PMC3);
	196	SYSFS_PMCSETUP(pa6t_pmc4, PA6T_SPRN_PMC4);
	197	SYSFS_PMCSETUP(pa6t_pmc5, PA6T_SPRN_PMC5);
	198
	199
1da177e4	200	static SYSDEV_ATTR(mmcra, 0600, show_mmcra, store_mmcra);
f050982a	201	static SYSDEV_ATTR(spurr, 0600, show_spurr, NULL);
4c198557	202	static SYSDEV_ATTR(dscr, 0600, show_dscr, store_dscr);
6529c13d OJ	203	static SYSDEV_ATTR(purr, 0600, show_purr, store_purr);
	204
	205	static struct sysdev_attribute ibm_common_attrs[] = {
	206	_SYSDEV_ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0),
	207	_SYSDEV_ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1),
	208	};
	209
	210	static struct sysdev_attribute ibm_pmc_attrs[] = {
	211	_SYSDEV_ATTR(pmc1, 0600, show_pmc1, store_pmc1),
	212	_SYSDEV_ATTR(pmc2, 0600, show_pmc2, store_pmc2),
	213	_SYSDEV_ATTR(pmc3, 0600, show_pmc3, store_pmc3),
	214	_SYSDEV_ATTR(pmc4, 0600, show_pmc4, store_pmc4),
	215	_SYSDEV_ATTR(pmc5, 0600, show_pmc5, store_pmc5),
	216	_SYSDEV_ATTR(pmc6, 0600, show_pmc6, store_pmc6),
	217	_SYSDEV_ATTR(pmc7, 0600, show_pmc7, store_pmc7),
	218	_SYSDEV_ATTR(pmc8, 0600, show_pmc8, store_pmc8),
	219	};
	220
	221	static struct sysdev_attribute pa6t_attrs[] = {
	222	_SYSDEV_ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0),
	223	_SYSDEV_ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1),
	224	_SYSDEV_ATTR(pmc0, 0600, show_pa6t_pmc0, store_pa6t_pmc0),
	225	_SYSDEV_ATTR(pmc1, 0600, show_pa6t_pmc1, store_pa6t_pmc1),
	226	_SYSDEV_ATTR(pmc2, 0600, show_pa6t_pmc2, store_pa6t_pmc2),
	227	_SYSDEV_ATTR(pmc3, 0600, show_pa6t_pmc3, store_pa6t_pmc3),
	228	_SYSDEV_ATTR(pmc4, 0600, show_pa6t_pmc4, store_pa6t_pmc4),
	229	_SYSDEV_ATTR(pmc5, 0600, show_pa6t_pmc5, store_pa6t_pmc5),
	230	};
	231
1da177e4 LT	232
	233	static void register_cpu_online(unsigned int cpu)
	234	{
	235	struct cpu *c = &per_cpu(cpu_devices, cpu);
	236	struct sys_device *s = &c->sysdev;
6529c13d OJ	237	struct sysdev_attribute attrs, pmc_attrs;
6529c13d OJ	238	int i, nattrs;
1da177e4	239
ad5cb17f SR	240	if (!firmware_has_feature(FW_FEATURE_ISERIES) &&
ad5cb17f SR	241	cpu_has_feature(CPU_FTR_SMT))
1da177e4	242	sysdev_create_file(s, &attr_smt_snooze_delay);
1da177e4 LT	243
1da177e4 LT	244	/* PMC stuff */
6529c13d OJ	245	switch (cur_cpu_spec->pmc_type) {
	246	case PPC_PMC_IBM:
	247	attrs = ibm_common_attrs;
	248	nattrs = sizeof(ibm_common_attrs) / sizeof(struct sysdev_attribute);
	249	pmc_attrs = ibm_pmc_attrs;
	250	break;
	251	case PPC_PMC_PA6T:
	252	/* PA Semi starts counting at PMC0 */
	253	attrs = pa6t_attrs;
	254	nattrs = sizeof(pa6t_attrs) / sizeof(struct sysdev_attribute);
	255	pmc_attrs = NULL;
	256	break;
	257	default:
	258	attrs = NULL;
	259	nattrs = 0;
	260	pmc_attrs = NULL;
	261	}
	262
	263	for (i = 0; i < nattrs; i++)
	264	sysdev_create_file(s, &attrs[i]);
1da177e4	265
6529c13d OJ	266	if (pmc_attrs)
	267	for (i = 0; i < cur_cpu_spec->num_pmcs; i++)
	268	sysdev_create_file(s, &pmc_attrs[i]);
1da177e4 LT	269
	270	if (cpu_has_feature(CPU_FTR_MMCRA))
	271	sysdev_create_file(s, &attr_mmcra);
	272
afd05423	273	if (cpu_has_feature(CPU_FTR_PURR))
1da177e4	274	sysdev_create_file(s, &attr_purr);
4c198557	275
f050982a AB	276	if (cpu_has_feature(CPU_FTR_SPURR))
	277	sysdev_create_file(s, &attr_spurr);
	278
4c198557 AB	279	if (cpu_has_feature(CPU_FTR_DSCR))
4c198557 AB	280	sysdev_create_file(s, &attr_dscr);
1da177e4 LT	281	}
	282
	283	#ifdef CONFIG_HOTPLUG_CPU
	284	static void unregister_cpu_online(unsigned int cpu)
	285	{
	286	struct cpu *c = &per_cpu(cpu_devices, cpu);
	287	struct sys_device *s = &c->sysdev;
6529c13d OJ	288	struct sysdev_attribute attrs, pmc_attrs;
6529c13d OJ	289	int i, nattrs;
1da177e4	290
72486f1f	291	BUG_ON(!c->hotpluggable);
1da177e4	292
ad5cb17f SR	293	if (!firmware_has_feature(FW_FEATURE_ISERIES) &&
ad5cb17f SR	294	cpu_has_feature(CPU_FTR_SMT))
1da177e4	295	sysdev_remove_file(s, &attr_smt_snooze_delay);
1da177e4 LT	296
1da177e4 LT	297	/* PMC stuff */
6529c13d OJ	298	switch (cur_cpu_spec->pmc_type) {
	299	case PPC_PMC_IBM:
	300	attrs = ibm_common_attrs;
	301	nattrs = sizeof(ibm_common_attrs) / sizeof(struct sysdev_attribute);
	302	pmc_attrs = ibm_pmc_attrs;
	303	break;
	304	case PPC_PMC_PA6T:
	305	/* PA Semi starts counting at PMC0 */
	306	attrs = pa6t_attrs;
	307	nattrs = sizeof(pa6t_attrs) / sizeof(struct sysdev_attribute);
	308	pmc_attrs = NULL;
	309	break;
	310	default:
	311	attrs = NULL;
	312	nattrs = 0;
	313	pmc_attrs = NULL;
	314	}
1da177e4	315
6529c13d OJ	316	for (i = 0; i < nattrs; i++)
	317	sysdev_remove_file(s, &attrs[i]);
	318
	319	if (pmc_attrs)
	320	for (i = 0; i < cur_cpu_spec->num_pmcs; i++)
	321	sysdev_remove_file(s, &pmc_attrs[i]);
1da177e4 LT	322
	323	if (cpu_has_feature(CPU_FTR_MMCRA))
	324	sysdev_remove_file(s, &attr_mmcra);
	325
afd05423	326	if (cpu_has_feature(CPU_FTR_PURR))
1da177e4	327	sysdev_remove_file(s, &attr_purr);
4c198557	328
f050982a AB	329	if (cpu_has_feature(CPU_FTR_SPURR))
	330	sysdev_remove_file(s, &attr_spurr);
	331
4c198557 AB	332	if (cpu_has_feature(CPU_FTR_DSCR))
4c198557 AB	333	sysdev_remove_file(s, &attr_dscr);
1da177e4 LT	334	}
	335	#endif /* CONFIG_HOTPLUG_CPU */
	336
8c78f307	337	static int __cpuinit sysfs_cpu_notify(struct notifier_block *self,
1da177e4 LT	338	unsigned long action, void *hcpu)
	339	{
	340	unsigned int cpu = (unsigned int)(long)hcpu;
	341
	342	switch (action) {
	343	case CPU_ONLINE:
	344	register_cpu_online(cpu);
	345	break;
	346	#ifdef CONFIG_HOTPLUG_CPU
	347	case CPU_DEAD:
	348	unregister_cpu_online(cpu);
	349	break;
	350	#endif
	351	}
	352	return NOTIFY_OK;
	353	}
	354
8c78f307	355	static struct notifier_block __cpuinitdata sysfs_cpu_nb = {
1da177e4 LT	356	.notifier_call = sysfs_cpu_notify,
	357	};
	358
0344c6c5 CK	359	static DEFINE_MUTEX(cpu_mutex);
	360
	361	int cpu_add_sysdev_attr(struct sysdev_attribute *attr)
	362	{
	363	int cpu;
	364
	365	mutex_lock(&cpu_mutex);
	366
	367	for_each_possible_cpu(cpu) {
	368	sysdev_create_file(get_cpu_sysdev(cpu), attr);
	369	}
	370
	371	mutex_unlock(&cpu_mutex);
	372	return 0;
	373	}
	374	EXPORT_SYMBOL_GPL(cpu_add_sysdev_attr);
	375
	376	int cpu_add_sysdev_attr_group(struct attribute_group *attrs)
	377	{
	378	int cpu;
	379	struct sys_device *sysdev;
	380
	381	mutex_lock(&cpu_mutex);
	382
	383	for_each_possible_cpu(cpu) {
	384	sysdev = get_cpu_sysdev(cpu);
	385	sysfs_create_group(&sysdev->kobj, attrs);
	386	}
	387
	388	mutex_unlock(&cpu_mutex);
	389	return 0;
	390	}
	391	EXPORT_SYMBOL_GPL(cpu_add_sysdev_attr_group);
	392
	393
	394	void cpu_remove_sysdev_attr(struct sysdev_attribute *attr)
	395	{
	396	int cpu;
	397
	398	mutex_lock(&cpu_mutex);
	399
	400	for_each_possible_cpu(cpu) {
	401	sysdev_remove_file(get_cpu_sysdev(cpu), attr);
	402	}
	403
	404	mutex_unlock(&cpu_mutex);
	405	}
	406	EXPORT_SYMBOL_GPL(cpu_remove_sysdev_attr);
	407
	408	void cpu_remove_sysdev_attr_group(struct attribute_group *attrs)
	409	{
	410	int cpu;
	411	struct sys_device *sysdev;
	412
	413	mutex_lock(&cpu_mutex);
	414
	415	for_each_possible_cpu(cpu) {
	416	sysdev = get_cpu_sysdev(cpu);
	417	sysfs_remove_group(&sysdev->kobj, attrs);
	418	}
	419
	420	mutex_unlock(&cpu_mutex);
	421	}
	422	EXPORT_SYMBOL_GPL(cpu_remove_sysdev_attr_group);
423
424
1da177e4 LT	425	/* NUMA stuff */
	426
	427	#ifdef CONFIG_NUMA
1da177e4 LT	428	static void register_nodes(void)
	429	{
	430	int i;
	431
0fc44159 YG	432	for (i = 0; i < MAX_NUMNODES; i++)
0fc44159 YG	433	register_one_node(i);
1da177e4	434	}
953039c8 JK	435
	436	int sysfs_add_device_to_node(struct sys_device *dev, int nid)
	437	{
	438	struct node *node = &node_devices[nid];
	439	return sysfs_create_link(&node->sysdev.kobj, &dev->kobj,
	440	kobject_name(&dev->kobj));
	441	}
	442
	443	void sysfs_remove_device_from_node(struct sys_device *dev, int nid)
	444	{
	445	struct node *node = &node_devices[nid];
	446	sysfs_remove_link(&node->sysdev.kobj, kobject_name(&dev->kobj));
	447	}
	448
1da177e4 LT	449	#else
	450	static void register_nodes(void)
	451	{
	452	return;
	453	}
953039c8	454
1da177e4 LT	455	#endif
1da177e4 LT	456
953039c8 JK	457	EXPORT_SYMBOL_GPL(sysfs_add_device_to_node);
	458	EXPORT_SYMBOL_GPL(sysfs_remove_device_from_node);
	459
1da177e4 LT	460	/* Only valid if CPU is present. */
	461	static ssize_t show_physical_id(struct sys_device dev, char buf)
	462	{
	463	struct cpu *cpu = container_of(dev, struct cpu, sysdev);
	464
	465	return sprintf(buf, "%d\n", get_hard_smp_processor_id(cpu->sysdev.id));
	466	}
	467	static SYSDEV_ATTR(physical_id, 0444, show_physical_id, NULL);
	468
	469	static int __init topology_init(void)
	470	{
	471	int cpu;
1da177e4 LT	472
1da177e4 LT	473	register_nodes();
1da177e4 LT	474	register_cpu_notifier(&sysfs_cpu_nb);
1da177e4 LT	475
0e551954	476	for_each_possible_cpu(cpu) {
1da177e4 LT	477	struct cpu *c = &per_cpu(cpu_devices, cpu);
1da177e4 LT	478
1da177e4 LT	479	/*
	480	* For now, we just see if the system supports making
	481	* the RTAS calls for CPU hotplug. But, there may be a
	482	* more comprehensive way to do this for an individual
	483	* CPU. For instance, the boot cpu might never be valid
	484	* for hotplugging.
	485	*/
72486f1f SS	486	if (ppc_md.cpu_die)
72486f1f SS	487	c->hotpluggable = 1;
1da177e4	488
72486f1f	489	if (cpu_online(cpu) \|\| c->hotpluggable) {
76b67ed9	490	register_cpu(c, cpu);
1da177e4 LT	491
	492	sysdev_create_file(&c->sysdev, &attr_physical_id);
	493	}
	494
	495	if (cpu_online(cpu))
	496	register_cpu_online(cpu);
	497	}
	498
	499	return 0;
	500	}
	501	__initcall(topology_init);