[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 = 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; \
}

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);

static SYSDEV_ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0);
static SYSDEV_ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1);
static SYSDEV_ATTR(mmcra, 0600, show_mmcra, store_mmcra);
static SYSDEV_ATTR(pmc1, 0600, show_pmc1, store_pmc1);
static SYSDEV_ATTR(pmc2, 0600, show_pmc2, store_pmc2);
static SYSDEV_ATTR(pmc3, 0600, show_pmc3, store_pmc3);
static SYSDEV_ATTR(pmc4, 0600, show_pmc4, store_pmc4);
static SYSDEV_ATTR(pmc5, 0600, show_pmc5, store_pmc5);
static SYSDEV_ATTR(pmc6, 0600, show_pmc6, store_pmc6);
static SYSDEV_ATTR(pmc7, 0600, show_pmc7, store_pmc7);
static SYSDEV_ATTR(pmc8, 0600, show_pmc8, store_pmc8);
static SYSDEV_ATTR(purr, 0600, show_purr, NULL);
static SYSDEV_ATTR(spurr, 0600, show_spurr, NULL);
static SYSDEV_ATTR(dscr, 0600, show_dscr, store_dscr);

static void register_cpu_online(unsigned int cpu)
{
	struct cpu *c = &per_cpu(cpu_devices, cpu);
	struct sys_device *s = &c->sysdev;

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

	/* PMC stuff */

	sysdev_create_file(s, &attr_mmcr0);
	sysdev_create_file(s, &attr_mmcr1);

	if (cpu_has_feature(CPU_FTR_MMCRA))
		sysdev_create_file(s, &attr_mmcra);

	if (cur_cpu_spec->num_pmcs >= 1)
		sysdev_create_file(s, &attr_pmc1);
	if (cur_cpu_spec->num_pmcs >= 2)
		sysdev_create_file(s, &attr_pmc2);
	if (cur_cpu_spec->num_pmcs >= 3)
		sysdev_create_file(s, &attr_pmc3);
	if (cur_cpu_spec->num_pmcs >= 4)
		sysdev_create_file(s, &attr_pmc4);
	if (cur_cpu_spec->num_pmcs >= 5)
		sysdev_create_file(s, &attr_pmc5);
	if (cur_cpu_spec->num_pmcs >= 6)
		sysdev_create_file(s, &attr_pmc6);
	if (cur_cpu_spec->num_pmcs >= 7)
		sysdev_create_file(s, &attr_pmc7);
	if (cur_cpu_spec->num_pmcs >= 8)
		sysdev_create_file(s, &attr_pmc8);

	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;

	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 */

	sysdev_remove_file(s, &attr_mmcr0);
	sysdev_remove_file(s, &attr_mmcr1);

	if (cpu_has_feature(CPU_FTR_MMCRA))
		sysdev_remove_file(s, &attr_mmcra);

	if (cur_cpu_spec->num_pmcs >= 1)
		sysdev_remove_file(s, &attr_pmc1);
	if (cur_cpu_spec->num_pmcs >= 2)
		sysdev_remove_file(s, &attr_pmc2);
	if (cur_cpu_spec->num_pmcs >= 3)
		sysdev_remove_file(s, &attr_pmc3);
	if (cur_cpu_spec->num_pmcs >= 4)
		sysdev_remove_file(s, &attr_pmc4);
	if (cur_cpu_spec->num_pmcs >= 5)
		sysdev_remove_file(s, &attr_pmc5);
	if (cur_cpu_spec->num_pmcs >= 6)
		sysdev_remove_file(s, &attr_pmc6);
	if (cur_cpu_spec->num_pmcs >= 7)
		sysdev_remove_file(s, &attr_pmc7);
	if (cur_cpu_spec->num_pmcs >= 8)
		sysdev_remove_file(s, &attr_pmc8);

	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
a7f67bdf	73	val = 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
	172	SYSFS_PMCSETUP(mmcr0, SPRN_MMCR0);
	173	SYSFS_PMCSETUP(mmcr1, SPRN_MMCR1);
	174	SYSFS_PMCSETUP(mmcra, SPRN_MMCRA);
	175	SYSFS_PMCSETUP(pmc1, SPRN_PMC1);
	176	SYSFS_PMCSETUP(pmc2, SPRN_PMC2);
	177	SYSFS_PMCSETUP(pmc3, SPRN_PMC3);
	178	SYSFS_PMCSETUP(pmc4, SPRN_PMC4);
	179	SYSFS_PMCSETUP(pmc5, SPRN_PMC5);
	180	SYSFS_PMCSETUP(pmc6, SPRN_PMC6);
	181	SYSFS_PMCSETUP(pmc7, SPRN_PMC7);
	182	SYSFS_PMCSETUP(pmc8, SPRN_PMC8);
	183	SYSFS_PMCSETUP(purr, SPRN_PURR);
f050982a	184	SYSFS_PMCSETUP(spurr, SPRN_SPURR);
4c198557	185	SYSFS_PMCSETUP(dscr, SPRN_DSCR);
1da177e4 LT	186
	187	static SYSDEV_ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0);
	188	static SYSDEV_ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1);
	189	static SYSDEV_ATTR(mmcra, 0600, show_mmcra, store_mmcra);
	190	static SYSDEV_ATTR(pmc1, 0600, show_pmc1, store_pmc1);
	191	static SYSDEV_ATTR(pmc2, 0600, show_pmc2, store_pmc2);
	192	static SYSDEV_ATTR(pmc3, 0600, show_pmc3, store_pmc3);
	193	static SYSDEV_ATTR(pmc4, 0600, show_pmc4, store_pmc4);
	194	static SYSDEV_ATTR(pmc5, 0600, show_pmc5, store_pmc5);
	195	static SYSDEV_ATTR(pmc6, 0600, show_pmc6, store_pmc6);
	196	static SYSDEV_ATTR(pmc7, 0600, show_pmc7, store_pmc7);
	197	static SYSDEV_ATTR(pmc8, 0600, show_pmc8, store_pmc8);
	198	static SYSDEV_ATTR(purr, 0600, show_purr, NULL);
f050982a	199	static SYSDEV_ATTR(spurr, 0600, show_spurr, NULL);
4c198557	200	static SYSDEV_ATTR(dscr, 0600, show_dscr, store_dscr);
1da177e4 LT	201
	202	static void register_cpu_online(unsigned int cpu)
	203	{
	204	struct cpu *c = &per_cpu(cpu_devices, cpu);
	205	struct sys_device *s = &c->sysdev;
	206
ad5cb17f SR	207	if (!firmware_has_feature(FW_FEATURE_ISERIES) &&
ad5cb17f SR	208	cpu_has_feature(CPU_FTR_SMT))
1da177e4	209	sysdev_create_file(s, &attr_smt_snooze_delay);
1da177e4 LT	210
	211	/* PMC stuff */
	212
	213	sysdev_create_file(s, &attr_mmcr0);
	214	sysdev_create_file(s, &attr_mmcr1);
	215
	216	if (cpu_has_feature(CPU_FTR_MMCRA))
	217	sysdev_create_file(s, &attr_mmcra);
	218
fd5b4377 AB	219	if (cur_cpu_spec->num_pmcs >= 1)
	220	sysdev_create_file(s, &attr_pmc1);
	221	if (cur_cpu_spec->num_pmcs >= 2)
	222	sysdev_create_file(s, &attr_pmc2);
	223	if (cur_cpu_spec->num_pmcs >= 3)
	224	sysdev_create_file(s, &attr_pmc3);
	225	if (cur_cpu_spec->num_pmcs >= 4)
	226	sysdev_create_file(s, &attr_pmc4);
	227	if (cur_cpu_spec->num_pmcs >= 5)
	228	sysdev_create_file(s, &attr_pmc5);
	229	if (cur_cpu_spec->num_pmcs >= 6)
	230	sysdev_create_file(s, &attr_pmc6);
	231	if (cur_cpu_spec->num_pmcs >= 7)
1da177e4	232	sysdev_create_file(s, &attr_pmc7);
fd5b4377	233	if (cur_cpu_spec->num_pmcs >= 8)
1da177e4	234	sysdev_create_file(s, &attr_pmc8);
d3d2176a	235
afd05423	236	if (cpu_has_feature(CPU_FTR_PURR))
1da177e4	237	sysdev_create_file(s, &attr_purr);
4c198557	238
f050982a AB	239	if (cpu_has_feature(CPU_FTR_SPURR))
	240	sysdev_create_file(s, &attr_spurr);
	241
4c198557 AB	242	if (cpu_has_feature(CPU_FTR_DSCR))
4c198557 AB	243	sysdev_create_file(s, &attr_dscr);
1da177e4 LT	244	}
	245
	246	#ifdef CONFIG_HOTPLUG_CPU
	247	static void unregister_cpu_online(unsigned int cpu)
	248	{
	249	struct cpu *c = &per_cpu(cpu_devices, cpu);
	250	struct sys_device *s = &c->sysdev;
	251
72486f1f	252	BUG_ON(!c->hotpluggable);
1da177e4	253
ad5cb17f SR	254	if (!firmware_has_feature(FW_FEATURE_ISERIES) &&
ad5cb17f SR	255	cpu_has_feature(CPU_FTR_SMT))
1da177e4	256	sysdev_remove_file(s, &attr_smt_snooze_delay);
1da177e4 LT	257
	258	/* PMC stuff */
	259
	260	sysdev_remove_file(s, &attr_mmcr0);
	261	sysdev_remove_file(s, &attr_mmcr1);
	262
	263	if (cpu_has_feature(CPU_FTR_MMCRA))
	264	sysdev_remove_file(s, &attr_mmcra);
	265
fd5b4377 AB	266	if (cur_cpu_spec->num_pmcs >= 1)
	267	sysdev_remove_file(s, &attr_pmc1);
	268	if (cur_cpu_spec->num_pmcs >= 2)
	269	sysdev_remove_file(s, &attr_pmc2);
	270	if (cur_cpu_spec->num_pmcs >= 3)
	271	sysdev_remove_file(s, &attr_pmc3);
	272	if (cur_cpu_spec->num_pmcs >= 4)
	273	sysdev_remove_file(s, &attr_pmc4);
	274	if (cur_cpu_spec->num_pmcs >= 5)
	275	sysdev_remove_file(s, &attr_pmc5);
	276	if (cur_cpu_spec->num_pmcs >= 6)
	277	sysdev_remove_file(s, &attr_pmc6);
	278	if (cur_cpu_spec->num_pmcs >= 7)
1da177e4	279	sysdev_remove_file(s, &attr_pmc7);
fd5b4377	280	if (cur_cpu_spec->num_pmcs >= 8)
1da177e4	281	sysdev_remove_file(s, &attr_pmc8);
1da177e4	282
afd05423	283	if (cpu_has_feature(CPU_FTR_PURR))
1da177e4	284	sysdev_remove_file(s, &attr_purr);
4c198557	285
f050982a AB	286	if (cpu_has_feature(CPU_FTR_SPURR))
	287	sysdev_remove_file(s, &attr_spurr);
	288
4c198557 AB	289	if (cpu_has_feature(CPU_FTR_DSCR))
4c198557 AB	290	sysdev_remove_file(s, &attr_dscr);
1da177e4 LT	291	}
	292	#endif /* CONFIG_HOTPLUG_CPU */
	293
8c78f307	294	static int __cpuinit sysfs_cpu_notify(struct notifier_block *self,
1da177e4 LT	295	unsigned long action, void *hcpu)
	296	{
	297	unsigned int cpu = (unsigned int)(long)hcpu;
	298
	299	switch (action) {
	300	case CPU_ONLINE:
	301	register_cpu_online(cpu);
	302	break;
	303	#ifdef CONFIG_HOTPLUG_CPU
	304	case CPU_DEAD:
	305	unregister_cpu_online(cpu);
	306	break;
	307	#endif
	308	}
	309	return NOTIFY_OK;
	310	}
	311
8c78f307	312	static struct notifier_block __cpuinitdata sysfs_cpu_nb = {
1da177e4 LT	313	.notifier_call = sysfs_cpu_notify,
	314	};
	315
0344c6c5 CK	316	static DEFINE_MUTEX(cpu_mutex);
	317
	318	int cpu_add_sysdev_attr(struct sysdev_attribute *attr)
	319	{
	320	int cpu;
	321
	322	mutex_lock(&cpu_mutex);
	323
	324	for_each_possible_cpu(cpu) {
	325	sysdev_create_file(get_cpu_sysdev(cpu), attr);
	326	}
	327
	328	mutex_unlock(&cpu_mutex);
	329	return 0;
	330	}
	331	EXPORT_SYMBOL_GPL(cpu_add_sysdev_attr);
	332
	333	int cpu_add_sysdev_attr_group(struct attribute_group *attrs)
	334	{
	335	int cpu;
	336	struct sys_device *sysdev;
	337
	338	mutex_lock(&cpu_mutex);
	339
	340	for_each_possible_cpu(cpu) {
	341	sysdev = get_cpu_sysdev(cpu);
	342	sysfs_create_group(&sysdev->kobj, attrs);
	343	}
	344
	345	mutex_unlock(&cpu_mutex);
	346	return 0;
	347	}
	348	EXPORT_SYMBOL_GPL(cpu_add_sysdev_attr_group);
	349
	350
	351	void cpu_remove_sysdev_attr(struct sysdev_attribute *attr)
	352	{
	353	int cpu;
	354
	355	mutex_lock(&cpu_mutex);
	356
	357	for_each_possible_cpu(cpu) {
	358	sysdev_remove_file(get_cpu_sysdev(cpu), attr);
	359	}
	360
	361	mutex_unlock(&cpu_mutex);
	362	}
	363	EXPORT_SYMBOL_GPL(cpu_remove_sysdev_attr);
	364
	365	void cpu_remove_sysdev_attr_group(struct attribute_group *attrs)
	366	{
	367	int cpu;
	368	struct sys_device *sysdev;
	369
	370	mutex_lock(&cpu_mutex);
	371
	372	for_each_possible_cpu(cpu) {
	373	sysdev = get_cpu_sysdev(cpu);
	374	sysfs_remove_group(&sysdev->kobj, attrs);
	375	}
	376
	377	mutex_unlock(&cpu_mutex);
	378	}
	379	EXPORT_SYMBOL_GPL(cpu_remove_sysdev_attr_group);
380
381
1da177e4 LT	382	/* NUMA stuff */
	383
	384	#ifdef CONFIG_NUMA
1da177e4 LT	385	static void register_nodes(void)
	386	{
	387	int i;
	388
0fc44159 YG	389	for (i = 0; i < MAX_NUMNODES; i++)
0fc44159 YG	390	register_one_node(i);
1da177e4	391	}
953039c8 JK	392
	393	int sysfs_add_device_to_node(struct sys_device *dev, int nid)
	394	{
	395	struct node *node = &node_devices[nid];
	396	return sysfs_create_link(&node->sysdev.kobj, &dev->kobj,
	397	kobject_name(&dev->kobj));
	398	}
	399
	400	void sysfs_remove_device_from_node(struct sys_device *dev, int nid)
	401	{
	402	struct node *node = &node_devices[nid];
	403	sysfs_remove_link(&node->sysdev.kobj, kobject_name(&dev->kobj));
	404	}
	405
1da177e4 LT	406	#else
	407	static void register_nodes(void)
	408	{
	409	return;
	410	}
953039c8	411
1da177e4 LT	412	#endif
1da177e4 LT	413
953039c8 JK	414	EXPORT_SYMBOL_GPL(sysfs_add_device_to_node);
	415	EXPORT_SYMBOL_GPL(sysfs_remove_device_from_node);
	416
1da177e4 LT	417	/* Only valid if CPU is present. */
	418	static ssize_t show_physical_id(struct sys_device dev, char buf)
	419	{
	420	struct cpu *cpu = container_of(dev, struct cpu, sysdev);
	421
	422	return sprintf(buf, "%d\n", get_hard_smp_processor_id(cpu->sysdev.id));
	423	}
	424	static SYSDEV_ATTR(physical_id, 0444, show_physical_id, NULL);
	425
	426	static int __init topology_init(void)
	427	{
	428	int cpu;
1da177e4 LT	429
1da177e4 LT	430	register_nodes();
1da177e4 LT	431	register_cpu_notifier(&sysfs_cpu_nb);
1da177e4 LT	432
0e551954	433	for_each_possible_cpu(cpu) {
1da177e4 LT	434	struct cpu *c = &per_cpu(cpu_devices, cpu);
1da177e4 LT	435
1da177e4 LT	436	/*
	437	* For now, we just see if the system supports making
	438	* the RTAS calls for CPU hotplug. But, there may be a
	439	* more comprehensive way to do this for an individual
	440	* CPU. For instance, the boot cpu might never be valid
	441	* for hotplugging.
	442	*/
72486f1f SS	443	if (ppc_md.cpu_die)
72486f1f SS	444	c->hotpluggable = 1;
1da177e4	445
72486f1f	446	if (cpu_online(cpu) \|\| c->hotpluggable) {
76b67ed9	447	register_cpu(c, cpu);
1da177e4 LT	448
	449	sysdev_create_file(&c->sysdev, &attr_physical_id);
	450	}
	451
	452	if (cpu_online(cpu))
	453	register_cpu_online(cpu);
	454	}
	455
	456	return 0;
	457	}
	458	__initcall(topology_init);