[mirror_ubuntu-bionic-kernel.git] / arch / sparc / kernel / sysfs.c

/* sysfs.c: Toplogy sysfs support code for sparc64.
 *
 * Copyright (C) 2007 David S. Miller <davem@davemloft.net>
 */
#include <linux/sched.h>
#include <linux/sysdev.h>
#include <linux/cpu.h>
#include <linux/smp.h>
#include <linux/percpu.h>
#include <linux/init.h>

#include <asm/cpudata.h>
#include <asm/hypervisor.h>
#include <asm/spitfire.h>

static DEFINE_PER_CPU(struct hv_mmu_statistics, mmu_stats) __attribute__((aligned(64)));

#define SHOW_MMUSTAT_ULONG(NAME) \
static ssize_t show_##NAME(struct sys_device *dev, \
			struct sysdev_attribute *attr, char *buf) \
{ \
	struct hv_mmu_statistics *p = &per_cpu(mmu_stats, dev->id); \
	return sprintf(buf, "%lu\n", p->NAME); \
} \
static SYSDEV_ATTR(NAME, 0444, show_##NAME, NULL)

SHOW_MMUSTAT_ULONG(immu_tsb_hits_ctx0_8k_tte);
SHOW_MMUSTAT_ULONG(immu_tsb_ticks_ctx0_8k_tte);
SHOW_MMUSTAT_ULONG(immu_tsb_hits_ctx0_64k_tte);
SHOW_MMUSTAT_ULONG(immu_tsb_ticks_ctx0_64k_tte);
SHOW_MMUSTAT_ULONG(immu_tsb_hits_ctx0_4mb_tte);
SHOW_MMUSTAT_ULONG(immu_tsb_ticks_ctx0_4mb_tte);
SHOW_MMUSTAT_ULONG(immu_tsb_hits_ctx0_256mb_tte);
SHOW_MMUSTAT_ULONG(immu_tsb_ticks_ctx0_256mb_tte);
SHOW_MMUSTAT_ULONG(immu_tsb_hits_ctxnon0_8k_tte);
SHOW_MMUSTAT_ULONG(immu_tsb_ticks_ctxnon0_8k_tte);
SHOW_MMUSTAT_ULONG(immu_tsb_hits_ctxnon0_64k_tte);
SHOW_MMUSTAT_ULONG(immu_tsb_ticks_ctxnon0_64k_tte);
SHOW_MMUSTAT_ULONG(immu_tsb_hits_ctxnon0_4mb_tte);
SHOW_MMUSTAT_ULONG(immu_tsb_ticks_ctxnon0_4mb_tte);
SHOW_MMUSTAT_ULONG(immu_tsb_hits_ctxnon0_256mb_tte);
SHOW_MMUSTAT_ULONG(immu_tsb_ticks_ctxnon0_256mb_tte);
SHOW_MMUSTAT_ULONG(dmmu_tsb_hits_ctx0_8k_tte);
SHOW_MMUSTAT_ULONG(dmmu_tsb_ticks_ctx0_8k_tte);
SHOW_MMUSTAT_ULONG(dmmu_tsb_hits_ctx0_64k_tte);
SHOW_MMUSTAT_ULONG(dmmu_tsb_ticks_ctx0_64k_tte);
SHOW_MMUSTAT_ULONG(dmmu_tsb_hits_ctx0_4mb_tte);
SHOW_MMUSTAT_ULONG(dmmu_tsb_ticks_ctx0_4mb_tte);
SHOW_MMUSTAT_ULONG(dmmu_tsb_hits_ctx0_256mb_tte);
SHOW_MMUSTAT_ULONG(dmmu_tsb_ticks_ctx0_256mb_tte);
SHOW_MMUSTAT_ULONG(dmmu_tsb_hits_ctxnon0_8k_tte);
SHOW_MMUSTAT_ULONG(dmmu_tsb_ticks_ctxnon0_8k_tte);
SHOW_MMUSTAT_ULONG(dmmu_tsb_hits_ctxnon0_64k_tte);
SHOW_MMUSTAT_ULONG(dmmu_tsb_ticks_ctxnon0_64k_tte);
SHOW_MMUSTAT_ULONG(dmmu_tsb_hits_ctxnon0_4mb_tte);
SHOW_MMUSTAT_ULONG(dmmu_tsb_ticks_ctxnon0_4mb_tte);
SHOW_MMUSTAT_ULONG(dmmu_tsb_hits_ctxnon0_256mb_tte);
SHOW_MMUSTAT_ULONG(dmmu_tsb_ticks_ctxnon0_256mb_tte);

static struct attribute *mmu_stat_attrs[] = {
	&attr_immu_tsb_hits_ctx0_8k_tte.attr,
	&attr_immu_tsb_ticks_ctx0_8k_tte.attr,
	&attr_immu_tsb_hits_ctx0_64k_tte.attr,
	&attr_immu_tsb_ticks_ctx0_64k_tte.attr,
	&attr_immu_tsb_hits_ctx0_4mb_tte.attr,
	&attr_immu_tsb_ticks_ctx0_4mb_tte.attr,
	&attr_immu_tsb_hits_ctx0_256mb_tte.attr,
	&attr_immu_tsb_ticks_ctx0_256mb_tte.attr,
	&attr_immu_tsb_hits_ctxnon0_8k_tte.attr,
	&attr_immu_tsb_ticks_ctxnon0_8k_tte.attr,
	&attr_immu_tsb_hits_ctxnon0_64k_tte.attr,
	&attr_immu_tsb_ticks_ctxnon0_64k_tte.attr,
	&attr_immu_tsb_hits_ctxnon0_4mb_tte.attr,
	&attr_immu_tsb_ticks_ctxnon0_4mb_tte.attr,
	&attr_immu_tsb_hits_ctxnon0_256mb_tte.attr,
	&attr_immu_tsb_ticks_ctxnon0_256mb_tte.attr,
	&attr_dmmu_tsb_hits_ctx0_8k_tte.attr,
	&attr_dmmu_tsb_ticks_ctx0_8k_tte.attr,
	&attr_dmmu_tsb_hits_ctx0_64k_tte.attr,
	&attr_dmmu_tsb_ticks_ctx0_64k_tte.attr,
	&attr_dmmu_tsb_hits_ctx0_4mb_tte.attr,
	&attr_dmmu_tsb_ticks_ctx0_4mb_tte.attr,
	&attr_dmmu_tsb_hits_ctx0_256mb_tte.attr,
	&attr_dmmu_tsb_ticks_ctx0_256mb_tte.attr,
	&attr_dmmu_tsb_hits_ctxnon0_8k_tte.attr,
	&attr_dmmu_tsb_ticks_ctxnon0_8k_tte.attr,
	&attr_dmmu_tsb_hits_ctxnon0_64k_tte.attr,
	&attr_dmmu_tsb_ticks_ctxnon0_64k_tte.attr,
	&attr_dmmu_tsb_hits_ctxnon0_4mb_tte.attr,
	&attr_dmmu_tsb_ticks_ctxnon0_4mb_tte.attr,
	&attr_dmmu_tsb_hits_ctxnon0_256mb_tte.attr,
	&attr_dmmu_tsb_ticks_ctxnon0_256mb_tte.attr,
	NULL,
};

static struct attribute_group mmu_stat_group = {
	.attrs = mmu_stat_attrs,
	.name = "mmu_stats",
};

/* 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_ptr(current, cpumask_of(cpu)))
		return 0;

	ret = func(arg);

	set_cpus_allowed_ptr(current, &old_affinity);

	return ret;
}

static unsigned long read_mmustat_enable(unsigned long junk)
{
	unsigned long ra = 0;

	sun4v_mmustat_info(&ra);

	return ra != 0;
}

static unsigned long write_mmustat_enable(unsigned long val)
{
	unsigned long ra, orig_ra;

	if (val)
		ra = __pa(&per_cpu(mmu_stats, smp_processor_id()));
	else
		ra = 0UL;

	return sun4v_mmustat_conf(ra, &orig_ra);
}

static ssize_t show_mmustat_enable(struct sys_device *s,
				struct sysdev_attribute *attr, char *buf)
{
	unsigned long val = run_on_cpu(s->id, read_mmustat_enable, 0);
	return sprintf(buf, "%lx\n", val);
}

static ssize_t store_mmustat_enable(struct sys_device *s,
			struct sysdev_attribute *attr, const char *buf,
			size_t count)
{
	unsigned long val, err;
	int ret = sscanf(buf, "%ld", &val);

	if (ret != 1)
		return -EINVAL;

	err = run_on_cpu(s->id, write_mmustat_enable, val);
	if (err)
		return -EIO;

	return count;
}

static SYSDEV_ATTR(mmustat_enable, 0644, show_mmustat_enable, store_mmustat_enable);

static int mmu_stats_supported;

static int register_mmu_stats(struct sys_device *s)
{
	if (!mmu_stats_supported)
		return 0;
	sysdev_create_file(s, &attr_mmustat_enable);
	return sysfs_create_group(&s->kobj, &mmu_stat_group);
}

#ifdef CONFIG_HOTPLUG_CPU
static void unregister_mmu_stats(struct sys_device *s)
{
	if (!mmu_stats_supported)
		return;
	sysfs_remove_group(&s->kobj, &mmu_stat_group);
	sysdev_remove_file(s, &attr_mmustat_enable);
}
#endif

#define SHOW_CPUDATA_ULONG_NAME(NAME, MEMBER) \
static ssize_t show_##NAME(struct sys_device *dev, \
		struct sysdev_attribute *attr, char *buf) \
{ \
	cpuinfo_sparc *c = &cpu_data(dev->id); \
	return sprintf(buf, "%lu\n", c->MEMBER); \
}

#define SHOW_CPUDATA_UINT_NAME(NAME, MEMBER) \
static ssize_t show_##NAME(struct sys_device *dev, \
		struct sysdev_attribute *attr, char *buf) \
{ \
	cpuinfo_sparc *c = &cpu_data(dev->id); \
	return sprintf(buf, "%u\n", c->MEMBER); \
}

SHOW_CPUDATA_ULONG_NAME(clock_tick, clock_tick);
SHOW_CPUDATA_UINT_NAME(l1_dcache_size, dcache_size);
SHOW_CPUDATA_UINT_NAME(l1_dcache_line_size, dcache_line_size);
SHOW_CPUDATA_UINT_NAME(l1_icache_size, icache_size);
SHOW_CPUDATA_UINT_NAME(l1_icache_line_size, icache_line_size);
SHOW_CPUDATA_UINT_NAME(l2_cache_size, ecache_size);
SHOW_CPUDATA_UINT_NAME(l2_cache_line_size, ecache_line_size);

static struct sysdev_attribute cpu_core_attrs[] = {
	_SYSDEV_ATTR(clock_tick,          0444, show_clock_tick, NULL),
	_SYSDEV_ATTR(l1_dcache_size,      0444, show_l1_dcache_size, NULL),
	_SYSDEV_ATTR(l1_dcache_line_size, 0444, show_l1_dcache_line_size, NULL),
	_SYSDEV_ATTR(l1_icache_size,      0444, show_l1_icache_size, NULL),
	_SYSDEV_ATTR(l1_icache_line_size, 0444, show_l1_icache_line_size, NULL),
	_SYSDEV_ATTR(l2_cache_size,       0444, show_l2_cache_size, NULL),
	_SYSDEV_ATTR(l2_cache_line_size,  0444, show_l2_cache_line_size, NULL),
};

static DEFINE_PER_CPU(struct cpu, cpu_devices);

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

	for (i = 0; i < ARRAY_SIZE(cpu_core_attrs); i++)
		sysdev_create_file(s, &cpu_core_attrs[i]);

	register_mmu_stats(s);
}

#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;
	int i;

	unregister_mmu_stats(s);
	for (i = 0; i < ARRAY_SIZE(cpu_core_attrs); i++)
		sysdev_remove_file(s, &cpu_core_attrs[i]);
}
#endif

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 void __init check_mmu_stats(void)
{
	unsigned long dummy1, err;

	if (tlb_type != hypervisor)
		return;

	err = sun4v_mmustat_info(&dummy1);
	if (!err)
		mmu_stats_supported = 1;
}

static void register_nodes(void)
{
#ifdef CONFIG_NUMA
	int i;

	for (i = 0; i < MAX_NUMNODES; i++)
		register_one_node(i);
#endif
}

static int __init topology_init(void)
{
	int cpu;

	register_nodes();

	check_mmu_stats();

	register_cpu_notifier(&sysfs_cpu_nb);

	for_each_possible_cpu(cpu) {
		struct cpu *c = &per_cpu(cpu_devices, cpu);

		register_cpu(c, cpu);
		if (cpu_online(cpu))
			register_cpu_online(cpu);
	}

	return 0;
}

subsys_initcall(topology_init);
Commit	Line	Data
eff3414b DM	1	/* sysfs.c: Toplogy sysfs support code for sparc64.
	2	*
	3	* Copyright (C) 2007 David S. Miller <davem@davemloft.net>
	4	*/
8abf9196	5	#include <linux/sched.h>
eff3414b DM	6	#include <linux/sysdev.h>
	7	#include <linux/cpu.h>
	8	#include <linux/smp.h>
	9	#include <linux/percpu.h>
	10	#include <linux/init.h>
	11
6e6ab2e2	12	#include <asm/cpudata.h>
d887ab3a DM	13	#include <asm/hypervisor.h>
	14	#include <asm/spitfire.h>
	15
	16	static DEFINE_PER_CPU(struct hv_mmu_statistics, mmu_stats) __attribute__((aligned(64)));
eff3414b	17
d887ab3a	18	#define SHOW_MMUSTAT_ULONG(NAME) \
4a0b2b4d AK	19	static ssize_t show_##NAME(struct sys_device *dev, \
4a0b2b4d AK	20	struct sysdev_attribute attr, char buf) \
d1f253e6	21	{ \
d887ab3a DM	22	struct hv_mmu_statistics *p = &per_cpu(mmu_stats, dev->id); \
	23	return sprintf(buf, "%lu\n", p->NAME); \
	24	} \
	25	static SYSDEV_ATTR(NAME, 0444, show_##NAME, NULL)
	26
	27	SHOW_MMUSTAT_ULONG(immu_tsb_hits_ctx0_8k_tte);
	28	SHOW_MMUSTAT_ULONG(immu_tsb_ticks_ctx0_8k_tte);
	29	SHOW_MMUSTAT_ULONG(immu_tsb_hits_ctx0_64k_tte);
	30	SHOW_MMUSTAT_ULONG(immu_tsb_ticks_ctx0_64k_tte);
	31	SHOW_MMUSTAT_ULONG(immu_tsb_hits_ctx0_4mb_tte);
	32	SHOW_MMUSTAT_ULONG(immu_tsb_ticks_ctx0_4mb_tte);
	33	SHOW_MMUSTAT_ULONG(immu_tsb_hits_ctx0_256mb_tte);
	34	SHOW_MMUSTAT_ULONG(immu_tsb_ticks_ctx0_256mb_tte);
	35	SHOW_MMUSTAT_ULONG(immu_tsb_hits_ctxnon0_8k_tte);
	36	SHOW_MMUSTAT_ULONG(immu_tsb_ticks_ctxnon0_8k_tte);
	37	SHOW_MMUSTAT_ULONG(immu_tsb_hits_ctxnon0_64k_tte);
	38	SHOW_MMUSTAT_ULONG(immu_tsb_ticks_ctxnon0_64k_tte);
	39	SHOW_MMUSTAT_ULONG(immu_tsb_hits_ctxnon0_4mb_tte);
	40	SHOW_MMUSTAT_ULONG(immu_tsb_ticks_ctxnon0_4mb_tte);
	41	SHOW_MMUSTAT_ULONG(immu_tsb_hits_ctxnon0_256mb_tte);
	42	SHOW_MMUSTAT_ULONG(immu_tsb_ticks_ctxnon0_256mb_tte);
	43	SHOW_MMUSTAT_ULONG(dmmu_tsb_hits_ctx0_8k_tte);
	44	SHOW_MMUSTAT_ULONG(dmmu_tsb_ticks_ctx0_8k_tte);
	45	SHOW_MMUSTAT_ULONG(dmmu_tsb_hits_ctx0_64k_tte);
	46	SHOW_MMUSTAT_ULONG(dmmu_tsb_ticks_ctx0_64k_tte);
	47	SHOW_MMUSTAT_ULONG(dmmu_tsb_hits_ctx0_4mb_tte);
	48	SHOW_MMUSTAT_ULONG(dmmu_tsb_ticks_ctx0_4mb_tte);
	49	SHOW_MMUSTAT_ULONG(dmmu_tsb_hits_ctx0_256mb_tte);
	50	SHOW_MMUSTAT_ULONG(dmmu_tsb_ticks_ctx0_256mb_tte);
	51	SHOW_MMUSTAT_ULONG(dmmu_tsb_hits_ctxnon0_8k_tte);
	52	SHOW_MMUSTAT_ULONG(dmmu_tsb_ticks_ctxnon0_8k_tte);
	53	SHOW_MMUSTAT_ULONG(dmmu_tsb_hits_ctxnon0_64k_tte);
	54	SHOW_MMUSTAT_ULONG(dmmu_tsb_ticks_ctxnon0_64k_tte);
	55	SHOW_MMUSTAT_ULONG(dmmu_tsb_hits_ctxnon0_4mb_tte);
	56	SHOW_MMUSTAT_ULONG(dmmu_tsb_ticks_ctxnon0_4mb_tte);
	57	SHOW_MMUSTAT_ULONG(dmmu_tsb_hits_ctxnon0_256mb_tte);
	58	SHOW_MMUSTAT_ULONG(dmmu_tsb_ticks_ctxnon0_256mb_tte);
	59
	60	static struct attribute *mmu_stat_attrs[] = {
	61	&attr_immu_tsb_hits_ctx0_8k_tte.attr,
	62	&attr_immu_tsb_ticks_ctx0_8k_tte.attr,
	63	&attr_immu_tsb_hits_ctx0_64k_tte.attr,
	64	&attr_immu_tsb_ticks_ctx0_64k_tte.attr,
	65	&attr_immu_tsb_hits_ctx0_4mb_tte.attr,
	66	&attr_immu_tsb_ticks_ctx0_4mb_tte.attr,
	67	&attr_immu_tsb_hits_ctx0_256mb_tte.attr,
	68	&attr_immu_tsb_ticks_ctx0_256mb_tte.attr,
	69	&attr_immu_tsb_hits_ctxnon0_8k_tte.attr,
	70	&attr_immu_tsb_ticks_ctxnon0_8k_tte.attr,
	71	&attr_immu_tsb_hits_ctxnon0_64k_tte.attr,
	72	&attr_immu_tsb_ticks_ctxnon0_64k_tte.attr,
	73	&attr_immu_tsb_hits_ctxnon0_4mb_tte.attr,
	74	&attr_immu_tsb_ticks_ctxnon0_4mb_tte.attr,
	75	&attr_immu_tsb_hits_ctxnon0_256mb_tte.attr,
	76	&attr_immu_tsb_ticks_ctxnon0_256mb_tte.attr,
	77	&attr_dmmu_tsb_hits_ctx0_8k_tte.attr,
	78	&attr_dmmu_tsb_ticks_ctx0_8k_tte.attr,
	79	&attr_dmmu_tsb_hits_ctx0_64k_tte.attr,
	80	&attr_dmmu_tsb_ticks_ctx0_64k_tte.attr,
	81	&attr_dmmu_tsb_hits_ctx0_4mb_tte.attr,
	82	&attr_dmmu_tsb_ticks_ctx0_4mb_tte.attr,
	83	&attr_dmmu_tsb_hits_ctx0_256mb_tte.attr,
	84	&attr_dmmu_tsb_ticks_ctx0_256mb_tte.attr,
	85	&attr_dmmu_tsb_hits_ctxnon0_8k_tte.attr,
86	&attr_dmmu_tsb_ticks_ctxnon0_8k_tte.attr,
87	&attr_dmmu_tsb_hits_ctxnon0_64k_tte.attr,
88	&attr_dmmu_tsb_ticks_ctxnon0_64k_tte.attr,
89	&attr_dmmu_tsb_hits_ctxnon0_4mb_tte.attr,
90	&attr_dmmu_tsb_ticks_ctxnon0_4mb_tte.attr,
91	&attr_dmmu_tsb_hits_ctxnon0_256mb_tte.attr,
92	&attr_dmmu_tsb_ticks_ctxnon0_256mb_tte.attr,
93	NULL,
94	};
95
96	static struct attribute_group mmu_stat_group = {
97	.attrs = mmu_stat_attrs,
98	.name = "mmu_stats",
99	};
100
101	/* XXX convert to rusty's on_one_cpu */
102	static unsigned long run_on_cpu(unsigned long cpu,
103	unsigned long (*func)(unsigned long),
104	unsigned long arg)
105	{
106	cpumask_t old_affinity = current->cpus_allowed;
107	unsigned long ret;
108
109	/* should return -EINVAL to userspace */
d2566af8	110	if (set_cpus_allowed_ptr(current, cpumask_of(cpu)))
d887ab3a DM	111	return 0;
	112
	113	ret = func(arg);
	114
d2566af8	115	set_cpus_allowed_ptr(current, &old_affinity);
d887ab3a DM	116
	117	return ret;
	118	}
	119
	120	static unsigned long read_mmustat_enable(unsigned long junk)
	121	{
	122	unsigned long ra = 0;
	123
	124	sun4v_mmustat_info(&ra);
	125
	126	return ra != 0;
	127	}
	128
	129	static unsigned long write_mmustat_enable(unsigned long val)
	130	{
	131	unsigned long ra, orig_ra;
	132
	133	if (val)
	134	ra = __pa(&per_cpu(mmu_stats, smp_processor_id()));
	135	else
	136	ra = 0UL;
	137
	138	return sun4v_mmustat_conf(ra, &orig_ra);
	139	}
	140
4a0b2b4d AK	141	static ssize_t show_mmustat_enable(struct sys_device *s,
4a0b2b4d AK	142	struct sysdev_attribute attr, char buf)
d887ab3a DM	143	{
	144	unsigned long val = run_on_cpu(s->id, read_mmustat_enable, 0);
	145	return sprintf(buf, "%lx\n", val);
	146	}
	147
4a0b2b4d AK	148	static ssize_t store_mmustat_enable(struct sys_device *s,
	149	struct sysdev_attribute attr, const char buf,
	150	size_t count)
d887ab3a DM	151	{
	152	unsigned long val, err;
	153	int ret = sscanf(buf, "%ld", &val);
	154
	155	if (ret != 1)
	156	return -EINVAL;
	157
	158	err = run_on_cpu(s->id, write_mmustat_enable, val);
	159	if (err)
	160	return -EIO;
	161
	162	return count;
	163	}
	164
	165	static SYSDEV_ATTR(mmustat_enable, 0644, show_mmustat_enable, store_mmustat_enable);
	166
	167	static int mmu_stats_supported;
	168
	169	static int register_mmu_stats(struct sys_device *s)
	170	{
	171	if (!mmu_stats_supported)
	172	return 0;
	173	sysdev_create_file(s, &attr_mmustat_enable);
	174	return sysfs_create_group(&s->kobj, &mmu_stat_group);
	175	}
	176
	177	#ifdef CONFIG_HOTPLUG_CPU
	178	static void unregister_mmu_stats(struct sys_device *s)
	179	{
	180	if (!mmu_stats_supported)
	181	return;
	182	sysfs_remove_group(&s->kobj, &mmu_stat_group);
	183	sysdev_remove_file(s, &attr_mmustat_enable);
	184	}
	185	#endif
	186
	187	#define SHOW_CPUDATA_ULONG_NAME(NAME, MEMBER) \
4a0b2b4d AK	188	static ssize_t show_##NAME(struct sys_device *dev, \
4a0b2b4d AK	189	struct sysdev_attribute attr, char buf) \
d887ab3a DM	190	{ \
d887ab3a DM	191	cpuinfo_sparc *c = &cpu_data(dev->id); \
d1f253e6 DM	192	return sprintf(buf, "%lu\n", c->MEMBER); \
	193	}
	194
d887ab3a	195	#define SHOW_CPUDATA_UINT_NAME(NAME, MEMBER) \
4a0b2b4d AK	196	static ssize_t show_##NAME(struct sys_device *dev, \
4a0b2b4d AK	197	struct sysdev_attribute attr, char buf) \
d1f253e6	198	{ \
d887ab3a	199	cpuinfo_sparc *c = &cpu_data(dev->id); \
d1f253e6 DM	200	return sprintf(buf, "%u\n", c->MEMBER); \
	201	}
	202
d887ab3a	203	SHOW_CPUDATA_ULONG_NAME(clock_tick, clock_tick);
d887ab3a DM	204	SHOW_CPUDATA_UINT_NAME(l1_dcache_size, dcache_size);
	205	SHOW_CPUDATA_UINT_NAME(l1_dcache_line_size, dcache_line_size);
	206	SHOW_CPUDATA_UINT_NAME(l1_icache_size, icache_size);
	207	SHOW_CPUDATA_UINT_NAME(l1_icache_line_size, icache_line_size);
	208	SHOW_CPUDATA_UINT_NAME(l2_cache_size, ecache_size);
	209	SHOW_CPUDATA_UINT_NAME(l2_cache_line_size, ecache_line_size);
d1f253e6 DM	210
	211	static struct sysdev_attribute cpu_core_attrs[] = {
	212	_SYSDEV_ATTR(clock_tick, 0444, show_clock_tick, NULL),
d1f253e6 DM	213	_SYSDEV_ATTR(l1_dcache_size, 0444, show_l1_dcache_size, NULL),
	214	_SYSDEV_ATTR(l1_dcache_line_size, 0444, show_l1_dcache_line_size, NULL),
	215	_SYSDEV_ATTR(l1_icache_size, 0444, show_l1_icache_size, NULL),
	216	_SYSDEV_ATTR(l1_icache_line_size, 0444, show_l1_icache_line_size, NULL),
	217	_SYSDEV_ATTR(l2_cache_size, 0444, show_l2_cache_size, NULL),
	218	_SYSDEV_ATTR(l2_cache_line_size, 0444, show_l2_cache_line_size, NULL),
	219	};
	220
d887ab3a DM	221	static DEFINE_PER_CPU(struct cpu, cpu_devices);
d887ab3a DM	222
d1f253e6 DM	223	static void register_cpu_online(unsigned int cpu)
	224	{
	225	struct cpu *c = &per_cpu(cpu_devices, cpu);
	226	struct sys_device *s = &c->sysdev;
	227	int i;
	228
	229	for (i = 0; i < ARRAY_SIZE(cpu_core_attrs); i++)
	230	sysdev_create_file(s, &cpu_core_attrs[i]);
d887ab3a DM	231
d887ab3a DM	232	register_mmu_stats(s);
d1f253e6 DM	233	}
	234
	235	#ifdef CONFIG_HOTPLUG_CPU
	236	static void unregister_cpu_online(unsigned int cpu)
	237	{
	238	struct cpu *c = &per_cpu(cpu_devices, cpu);
	239	struct sys_device *s = &c->sysdev;
	240	int i;
	241
d887ab3a	242	unregister_mmu_stats(s);
d1f253e6 DM	243	for (i = 0; i < ARRAY_SIZE(cpu_core_attrs); i++)
	244	sysdev_remove_file(s, &cpu_core_attrs[i]);
	245	}
	246	#endif
	247
	248	static int __cpuinit sysfs_cpu_notify(struct notifier_block *self,
	249	unsigned long action, void *hcpu)
	250	{
	251	unsigned int cpu = (unsigned int)(long)hcpu;
	252
	253	switch (action) {
	254	case CPU_ONLINE:
	255	case CPU_ONLINE_FROZEN:
	256	register_cpu_online(cpu);
	257	break;
	258	#ifdef CONFIG_HOTPLUG_CPU
	259	case CPU_DEAD:
	260	case CPU_DEAD_FROZEN:
	261	unregister_cpu_online(cpu);
	262	break;
	263	#endif
	264	}
	265	return NOTIFY_OK;
	266	}
	267
	268	static struct notifier_block __cpuinitdata sysfs_cpu_nb = {
	269	.notifier_call = sysfs_cpu_notify,
	270	};
	271
d887ab3a DM	272	static void __init check_mmu_stats(void)
	273	{
	274	unsigned long dummy1, err;
	275
	276	if (tlb_type != hypervisor)
	277	return;
	278
	279	err = sun4v_mmustat_info(&dummy1);
	280	if (!err)
	281	mmu_stats_supported = 1;
	282	}
	283
919ee677 DM	284	static void register_nodes(void)
	285	{
	286	#ifdef CONFIG_NUMA
	287	int i;
	288
	289	for (i = 0; i < MAX_NUMNODES; i++)
	290	register_one_node(i);
	291	#endif
	292	}
	293
eff3414b DM	294	static int __init topology_init(void)
	295	{
	296	int cpu;
	297
919ee677 DM	298	register_nodes();
919ee677 DM	299
d887ab3a DM	300	check_mmu_stats();
d887ab3a DM	301
d1f253e6 DM	302	register_cpu_notifier(&sysfs_cpu_nb);
d1f253e6 DM	303
eff3414b DM	304	for_each_possible_cpu(cpu) {
	305	struct cpu *c = &per_cpu(cpu_devices, cpu);
	306
	307	register_cpu(c, cpu);
d1f253e6 DM	308	if (cpu_online(cpu))
d1f253e6 DM	309	register_cpu_online(cpu);
eff3414b DM	310	}
	311
	312	return 0;
	313	}
	314
	315	subsys_initcall(topology_init);