1 // SPDX-License-Identifier: GPL-2.0
3  * Extract CPU cache information and expose them via sysfs.
71 	struct cacheinfo *cache;  in show_cacheinfo()  local
77 	for (idx = 0; idx < this_cpu_ci->num_leaves; idx++) {  in show_cacheinfo()
78 		cache = this_cpu_ci->info_list + idx;  in show_cacheinfo()
79 		seq_printf(m, "cache%-11d: ", idx);  in show_cacheinfo()
80 		seq_printf(m, "level=%d ", cache->level);  in show_cacheinfo()
81 		seq_printf(m, "type=%s ", cache_type_string[cache->type]);  in show_cacheinfo()
83 			   cache->disable_sysfs ? "Shared" : "Private");  in show_cacheinfo()
84 		seq_printf(m, "size=%dK ", cache->size >> 10);  in show_cacheinfo()
85 		seq_printf(m, "line_size=%u ", cache->coherency_line_size);  in show_cacheinfo()
86 		seq_printf(m, "associativity=%d", cache->ways_of_associativity);  in show_cacheinfo()
91 static inline enum cache_type get_cache_type(struct cache_info *ci, int level)  in get_cache_type()  argument
93 	if (level >= CACHE_MAX_LEVEL)  in get_cache_type()
95 	ci += level;  in get_cache_type()
96 	if (ci->scope != CACHE_SCOPE_SHARED && ci->scope != CACHE_SCOPE_PRIVATE)  in get_cache_type()
98 	return cache_type_map[ci->type];  in get_cache_type()
107 			 enum cache_type type, unsigned int level, int cpu)  in ci_leaf_init()  argument
115 	this_leaf->level = level + 1;  in ci_leaf_init()
116 	this_leaf->type = type;  in ci_leaf_init()
117 	this_leaf->coherency_line_size = ecag(EXTRACT_LINE_SIZE, level, ti);  in ci_leaf_init()
118 	this_leaf->ways_of_associativity = ecag(EXTRACT_ASSOCIATIVITY, level, ti);  in ci_leaf_init()
119 	this_leaf->size = ecag(EXTRACT_SIZE, level, ti);  in ci_leaf_init()
120 	num_sets = this_leaf->size / this_leaf->coherency_line_size;  in ci_leaf_init()
121 	num_sets /= this_leaf->ways_of_associativity;  in ci_leaf_init()
122 	this_leaf->number_of_sets = num_sets;  in ci_leaf_init()
123 	cpumask_set_cpu(cpu, &this_leaf->shared_cpu_map);  in ci_leaf_init()
125 		this_leaf->disable_sysfs = true;  in ci_leaf_init()
131 	unsigned int level = 0, leaves = 0;  in init_cache_level()  local
136 		return -EOPNOTSUPP;  in init_cache_level()
138 		return -EINVAL;  in init_cache_level()
141 		ctype = get_cache_type(&ct.ci[0], level);  in init_cache_level()
146 	} while (++level < CACHE_MAX_LEVEL);  in init_cache_level()
147 	this_cpu_ci->num_levels = level;  in init_cache_level()
148 	this_cpu_ci->num_leaves = leaves;  in init_cache_level()
155 	struct cacheinfo *this_leaf = this_cpu_ci->info_list;  in populate_cache_leaves()
156 	unsigned int level, idx, pvt;  in populate_cache_leaves()  local
161 		return -EOPNOTSUPP;  in populate_cache_leaves()
163 	for (idx = 0, level = 0; level < this_cpu_ci->num_levels &&  in populate_cache_leaves()
164 	     idx < this_cpu_ci->num_leaves; idx++, level++) {  in populate_cache_leaves()
166 			return -EINVAL;  in populate_cache_leaves()
167 		pvt = (ct.ci[level].scope == CACHE_SCOPE_PRIVATE) ? 1 : 0;  in populate_cache_leaves()
168 		ctype = get_cache_type(&ct.ci[0], level);  in populate_cache_leaves()
170 			ci_leaf_init(this_leaf++, pvt, CACHE_TYPE_DATA, level, cpu);  in populate_cache_leaves()
171 			ci_leaf_init(this_leaf++, pvt, CACHE_TYPE_INST, level, cpu);  in populate_cache_leaves()
173 			ci_leaf_init(this_leaf++, pvt, ctype, level, cpu);  in populate_cache_leaves()