1 // SPDX-License-Identifier: GPL-2.0
3  * cacheinfo support - processor cache information via sysfs
26 #define cache_leaves(cpu)	(ci_cacheinfo(cpu)->num_leaves)
27 #define per_cpu_cacheinfo(cpu)	(ci_cacheinfo(cpu)->info_list)
38 	return sib_leaf->fw_token == this_leaf->fw_token;  in cache_leaves_are_shared()
41 /* OF properties to query for a given cache type */
50 		.size_prop       = "cache-size",
51 		.line_size_props = { "cache-line-size",
52 				     "cache-block-size", },
53 		.nr_sets_prop    = "cache-sets",
55 		.size_prop       = "i-cache-size",
56 		.line_size_props = { "i-cache-line-size",
57 				     "i-cache-block-size", },
58 		.nr_sets_prop    = "i-cache-sets",
60 		.size_prop       = "d-cache-size",
61 		.line_size_props = { "d-cache-line-size",
62 				     "d-cache-block-size", },
63 		.nr_sets_prop    = "d-cache-sets",
79 	ct_idx = get_cacheinfo_idx(this_leaf->type);  in cache_size()
82 	of_property_read_u32(np, propname, &this_leaf->size);  in cache_size()
85 /* not cache_line_size() because that's a macro in include/linux/cache.h */
91 	ct_idx = get_cacheinfo_idx(this_leaf->type);  in cache_get_line_size()
102 			this_leaf->coherency_line_size = line_size;  in cache_get_line_size()
113 	ct_idx = get_cacheinfo_idx(this_leaf->type);  in cache_nr_sets()
116 	of_property_read_u32(np, propname, &this_leaf->number_of_sets);  in cache_nr_sets()
121 	unsigned int line_size = this_leaf->coherency_line_size;  in cache_associativity()
122 	unsigned int nr_sets = this_leaf->number_of_sets;  in cache_associativity()
123 	unsigned int size = this_leaf->size;  in cache_associativity()
126 	 * If the cache is fully associative, there is no need to  in cache_associativity()
130 		this_leaf->ways_of_associativity = (size / nr_sets) / line_size;  in cache_associativity()
136 	return of_property_read_bool(np, "cache-unified");  in cache_node_is_unified()
143 	 * init_cache_level must setup the cache level correctly  in cache_of_set_props()
145 	 * if type is NONE at this stage, it should be unified  in cache_of_set_props()
147 	if (this_leaf->type == CACHE_TYPE_NOCACHE &&  in cache_of_set_props()
149 		this_leaf->type = CACHE_TYPE_UNIFIED;  in cache_of_set_props()
165 	if (this_cpu_ci->info_list->fw_token) {  in cache_setup_of_node()
171 		return -ENODEV;  in cache_setup_of_node()
173 	np = cpu_dev->of_node;  in cache_setup_of_node()
176 		return -ENOENT;  in cache_setup_of_node()
180 		this_leaf = this_cpu_ci->info_list + index;  in cache_setup_of_node()
181 		if (this_leaf->level != 1)  in cache_setup_of_node()
188 		this_leaf->fw_token = np;  in cache_setup_of_node()
193 		return -ENOENT;  in cache_setup_of_node()
203 	 * For non-DT/ACPI systems, assume unique level 1 caches, system-wide  in cache_leaves_are_shared()
207 	return !(this_leaf->level == 1);  in cache_leaves_are_shared()
213 	return -ENOTSUPP;  in cache_setup_acpi()
225 	if (this_cpu_ci->cpu_map_populated)  in cache_shared_cpu_map_setup()
239 		this_leaf = this_cpu_ci->info_list + index;  in cache_shared_cpu_map_setup()
241 		if (!cpumask_empty(&this_leaf->shared_cpu_map))  in cache_shared_cpu_map_setup()
244 		cpumask_set_cpu(cpu, &this_leaf->shared_cpu_map);  in cache_shared_cpu_map_setup()
248 			if (i == cpu || !sib_cpu_ci->info_list)  in cache_shared_cpu_map_setup()
250 			sib_leaf = sib_cpu_ci->info_list + index;  in cache_shared_cpu_map_setup()
252 				cpumask_set_cpu(cpu, &sib_leaf->shared_cpu_map);  in cache_shared_cpu_map_setup()
253 				cpumask_set_cpu(i, &this_leaf->shared_cpu_map);  in cache_shared_cpu_map_setup()
256 		/* record the maximum cache line size */  in cache_shared_cpu_map_setup()
257 		if (this_leaf->coherency_line_size > coherency_max_size)  in cache_shared_cpu_map_setup()
258 			coherency_max_size = this_leaf->coherency_line_size;  in cache_shared_cpu_map_setup()
271 		this_leaf = this_cpu_ci->info_list + index;  in cache_shared_cpu_map_remove()
272 		for_each_cpu(sibling, &this_leaf->shared_cpu_map) {  in cache_shared_cpu_map_remove()
279 			if (!sib_cpu_ci->info_list)  in cache_shared_cpu_map_remove()
282 			sib_leaf = sib_cpu_ci->info_list + index;  in cache_shared_cpu_map_remove()
283 			cpumask_clear_cpu(cpu, &sib_leaf->shared_cpu_map);  in cache_shared_cpu_map_remove()
284 			cpumask_clear_cpu(sibling, &this_leaf->shared_cpu_map);  in cache_shared_cpu_map_remove()
287 			of_node_put(this_leaf->fw_token);  in cache_shared_cpu_map_remove()
305 	return -ENOENT;  in init_cache_level()
310 	return -ENOENT;  in populate_cache_leaves()
318 		return -ENOENT;  in detect_cache_attributes()
323 		return -ENOMEM;  in detect_cache_attributes()
326 	 * populate_cache_leaves() may completely setup the cache leaves and  in detect_cache_attributes()
333 	 * For systems using DT for cache hierarchy, fw_token  in detect_cache_attributes()
339 		pr_warn("Unable to detect cache hierarchy for CPU %d\n", cpu);  in detect_cache_attributes()
350 /* pointer to cpuX/cache device */
356 /* pointer to array of devices for cpuX/cache/indexY */
366 	return sysfs_emit(buf, "%u\n", this_leaf->object);	\
381 	return sysfs_emit(buf, "%uK\n", this_leaf->size >> 10);  in size_show()
388 	const struct cpumask *mask = &this_leaf->shared_cpu_map;  in shared_cpu_map_show()
397 	const struct cpumask *mask = &this_leaf->shared_cpu_map;  in shared_cpu_list_show()
408 	switch (this_leaf->type) {  in type_show()
416 		output = "Unified";  in type_show()
419 		return -EINVAL;  in type_show()
429 	unsigned int ci_attr = this_leaf->attributes;  in allocation_policy_show()
448 	unsigned int ci_attr = this_leaf->attributes;  in write_policy_show()
493 	const struct cpumask *mask = &this_leaf->shared_cpu_map;  in cache_default_attrs_is_visible()
494 	umode_t mode = attr->mode;  in cache_default_attrs_is_visible()
496 	if ((attr == &dev_attr_id.attr) && (this_leaf->attributes & CACHE_ID))  in cache_default_attrs_is_visible()
498 	if ((attr == &dev_attr_type.attr) && this_leaf->type)  in cache_default_attrs_is_visible()
500 	if ((attr == &dev_attr_level.attr) && this_leaf->level)  in cache_default_attrs_is_visible()
507 	    this_leaf->coherency_line_size)  in cache_default_attrs_is_visible()
510 	    this_leaf->size) /* allow 0 = full associativity */  in cache_default_attrs_is_visible()
513 	    this_leaf->number_of_sets)  in cache_default_attrs_is_visible()
515 	if ((attr == &dev_attr_size.attr) && this_leaf->size)  in cache_default_attrs_is_visible()
518 	    (this_leaf->attributes & CACHE_WRITE_POLICY_MASK))  in cache_default_attrs_is_visible()
521 	    (this_leaf->attributes & CACHE_ALLOCATE_POLICY_MASK))  in cache_default_attrs_is_visible()
524 	    this_leaf->physical_line_partition)  in cache_default_attrs_is_visible()
567 /* Add/Remove cache interface for CPU device */
592 		return -ENOENT;  in cpu_cache_sysfs_init()
594 	per_cpu_cache_dev(cpu) = cpu_device_create(dev, NULL, NULL, "cache");  in cpu_cache_sysfs_init()
608 	return -ENOMEM;  in cpu_cache_sysfs_init()
626 		this_leaf = this_cpu_ci->info_list + i;  in cache_add_dev()
627 		if (this_leaf->disable_sysfs)  in cache_add_dev()
629 		if (this_leaf->type == CACHE_TYPE_NOCACHE)  in cache_add_dev()