// SPDX-License-Identifier: GPL-2.0/* sysfs.c: Topology sysfs support code for sparc64. * * Copyright (C) 2007 David S. Miller <davem@davemloft.net> */#include <linux/sched.h>#include <linux/device.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 device *dev, \			struct device_attribute *attr, char *buf) \{ \	struct hv_mmu_statistics *p = &per_cpu(mmu_stats, dev->id); \	return sprintf(buf, "%lu\n", p->NAME); \} \static DEVICE_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[] = {	&dev_attr_immu_tsb_hits_ctx0_8k_tte.attr,	&dev_attr_immu_tsb_ticks_ctx0_8k_tte.attr,	&dev_attr_immu_tsb_hits_ctx0_64k_tte.attr,	&dev_attr_immu_tsb_ticks_ctx0_64k_tte.attr,	&dev_attr_immu_tsb_hits_ctx0_4mb_tte.attr,	&dev_attr_immu_tsb_ticks_ctx0_4mb_tte.attr,	&dev_attr_immu_tsb_hits_ctx0_256mb_tte.attr,	&dev_attr_immu_tsb_ticks_ctx0_256mb_tte.attr,	&dev_attr_immu_tsb_hits_ctxnon0_8k_tte.attr,	&dev_attr_immu_tsb_ticks_ctxnon0_8k_tte.attr,	&dev_attr_immu_tsb_hits_ctxnon0_64k_tte.attr,	&dev_attr_immu_tsb_ticks_ctxnon0_64k_tte.attr,	&dev_attr_immu_tsb_hits_ctxnon0_4mb_tte.attr,	&dev_attr_immu_tsb_ticks_ctxnon0_4mb_tte.attr,	&dev_attr_immu_tsb_hits_ctxnon0_256mb_tte.attr,	&dev_attr_immu_tsb_ticks_ctxnon0_256mb_tte.attr,	&dev_attr_dmmu_tsb_hits_ctx0_8k_tte.attr,	&dev_attr_dmmu_tsb_ticks_ctx0_8k_tte.attr,	&dev_attr_dmmu_tsb_hits_ctx0_64k_tte.attr,	&dev_attr_dmmu_tsb_ticks_ctx0_64k_tte.attr,	&dev_attr_dmmu_tsb_hits_ctx0_4mb_tte.attr,	&dev_attr_dmmu_tsb_ticks_ctx0_4mb_tte.attr,	&dev_attr_dmmu_tsb_hits_ctx0_256mb_tte.attr,	&dev_attr_dmmu_tsb_ticks_ctx0_256mb_tte.attr,	&dev_attr_dmmu_tsb_hits_ctxnon0_8k_tte.attr,	&dev_attr_dmmu_tsb_ticks_ctxnon0_8k_tte.attr,	&dev_attr_dmmu_tsb_hits_ctxnon0_64k_tte.attr,	&dev_attr_dmmu_tsb_ticks_ctxnon0_64k_tte.attr,	&dev_attr_dmmu_tsb_hits_ctxnon0_4mb_tte.attr,	&dev_attr_dmmu_tsb_ticks_ctxnon0_4mb_tte.attr,	&dev_attr_dmmu_tsb_hits_ctxnon0_256mb_tte.attr,	&dev_attr_dmmu_tsb_ticks_ctxnon0_256mb_tte.attr,	NULL,}; static struct attribute_group mmu_stat_group = {	.attrs = mmu_stat_attrs,	.name = "mmu_stats",}; static long read_mmustat_enable(void *data __maybe_unused){	unsigned long ra = 0; 	sun4v_mmustat_info(&ra); 	return ra != 0;} static long write_mmustat_enable(void *data){	unsigned long ra, orig_ra, *val = data; 	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 device *s,				struct device_attribute *attr, char *buf){	long val = work_on_cpu(s->id, read_mmustat_enable, NULL); 	return sprintf(buf, "%lx\n", val);} static ssize_t store_mmustat_enable(struct device *s,			struct device_attribute *attr, const char *buf,			size_t count){	unsigned long val;	long err;	int ret; 	ret = sscanf(buf, "%lu", &val);	if (ret != 1)		return -EINVAL; 	err = work_on_cpu(s->id, write_mmustat_enable, &val);	if (err)		return -EIO; 	return count;} static DEVICE_ATTR(mmustat_enable, 0644, show_mmustat_enable, store_mmustat_enable); static int mmu_stats_supported; static int register_mmu_stats(struct device *s){	if (!mmu_stats_supported)		return 0;	device_create_file(s, &dev_attr_mmustat_enable);	return sysfs_create_group(&s->kobj, &mmu_stat_group);} #ifdef CONFIG_HOTPLUG_CPUstatic void unregister_mmu_stats(struct device *s){	if (!mmu_stats_supported)		return;	sysfs_remove_group(&s->kobj, &mmu_stat_group);	device_remove_file(s, &dev_attr_mmustat_enable);}#endif #define SHOW_CPUDATA_ULONG_NAME(NAME, MEMBER) \static ssize_t show_##NAME(struct device *dev, \		struct device_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 device *dev, \		struct device_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 device_attribute cpu_core_attrs[] = {	__ATTR(clock_tick,          0444, show_clock_tick, NULL),	__ATTR(l1_dcache_size,      0444, show_l1_dcache_size, NULL),	__ATTR(l1_dcache_line_size, 0444, show_l1_dcache_line_size, NULL),	__ATTR(l1_icache_size,      0444, show_l1_icache_size, NULL),	__ATTR(l1_icache_line_size, 0444, show_l1_icache_line_size, NULL),	__ATTR(l2_cache_size,       0444, show_l2_cache_size, NULL),	__ATTR(l2_cache_line_size,  0444, show_l2_cache_line_size, NULL),}; static DEFINE_PER_CPU(struct cpu, cpu_devices); static int register_cpu_online(unsigned int cpu){	struct cpu *c = &per_cpu(cpu_devices, cpu);	struct device *s = &c->dev;	int i; 	for (i = 0; i < ARRAY_SIZE(cpu_core_attrs); i++)		device_create_file(s, &cpu_core_attrs[i]); 	register_mmu_stats(s);	return 0;} static int unregister_cpu_online(unsigned int cpu){#ifdef CONFIG_HOTPLUG_CPU	struct cpu *c = &per_cpu(cpu_devices, cpu);	struct device *s = &c->dev;	int i; 	unregister_mmu_stats(s);	for (i = 0; i < ARRAY_SIZE(cpu_core_attrs); i++)		device_remove_file(s, &cpu_core_attrs[i]);#endif	return 0;} 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 int __init topology_init(void){	int cpu, ret; 	check_mmu_stats(); 	for_each_possible_cpu(cpu) {		struct cpu *c = &per_cpu(cpu_devices, cpu); 		register_cpu(c, cpu);	} 	ret = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "sparc/topology:online",				register_cpu_online, unregister_cpu_online);	WARN_ON(ret < 0);	return 0;} subsys_initcall(topology_init);