^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Processor cache information made available to userspace via sysfs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * intended to be compatible with x86 intel_cacheinfo implementation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Copyright 2008 IBM Corporation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Author: Nathan Lynch
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #define pr_fmt(fmt) "cacheinfo: " fmt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/cpu.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/cpumask.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/kobject.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/list.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/notifier.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/of.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/percpu.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <asm/prom.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <asm/cputhreads.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <asm/smp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include "cacheinfo.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) /* per-cpu object for tracking:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) * - a "cache" kobject for the top-level directory
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) * - a list of "index" objects representing the cpu's local cache hierarchy
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) struct cache_dir {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) struct kobject *kobj; /* bare (not embedded) kobject for cache
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) * directory */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) struct cache_index_dir *index; /* list of index objects */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) /* "index" object: each cpu's cache directory has an index
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) * subdirectory corresponding to a cache object associated with the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) * cpu. This object's lifetime is managed via the embedded kobject.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) struct cache_index_dir {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) struct kobject kobj;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) struct cache_index_dir *next; /* next index in parent directory */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) struct cache *cache;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) /* Template for determining which OF properties to query for a given
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) * cache type */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) struct cache_type_info {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) const char *name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) const char *size_prop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) /* Allow for both [di]-cache-line-size and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) * [di]-cache-block-size properties. According to the PowerPC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) * Processor binding, -line-size should be provided if it
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) * differs from the cache block size (that which is operated
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) * on by cache instructions), so we look for -line-size first.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) * See cache_get_line_size(). */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) const char *line_size_props[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) const char *nr_sets_prop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) /* These are used to index the cache_type_info array. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) #define CACHE_TYPE_UNIFIED 0 /* cache-size, cache-block-size, etc. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) #define CACHE_TYPE_UNIFIED_D 1 /* d-cache-size, d-cache-block-size, etc */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) #define CACHE_TYPE_INSTRUCTION 2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) #define CACHE_TYPE_DATA 3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) static const struct cache_type_info cache_type_info[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) /* Embedded systems that use cache-size, cache-block-size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) * etc. for the Unified (typically L2) cache. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) .name = "Unified",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) .size_prop = "cache-size",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) .line_size_props = { "cache-line-size",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) "cache-block-size", },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) .nr_sets_prop = "cache-sets",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) /* PowerPC Processor binding says the [di]-cache-*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) * must be equal on unified caches, so just use
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) * d-cache properties. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) .name = "Unified",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) .size_prop = "d-cache-size",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) .line_size_props = { "d-cache-line-size",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) "d-cache-block-size", },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) .nr_sets_prop = "d-cache-sets",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) .name = "Instruction",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) .size_prop = "i-cache-size",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) .line_size_props = { "i-cache-line-size",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) "i-cache-block-size", },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) .nr_sets_prop = "i-cache-sets",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) .name = "Data",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) .size_prop = "d-cache-size",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) .line_size_props = { "d-cache-line-size",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) "d-cache-block-size", },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) .nr_sets_prop = "d-cache-sets",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) /* Cache object: each instance of this corresponds to a distinct cache
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) * in the system. There are separate objects for Harvard caches: one
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) * each for instruction and data, and each refers to the same OF node.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) * The refcount of the OF node is elevated for the lifetime of the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) * cache object. A cache object is released when its shared_cpu_map
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) * is cleared (see cache_cpu_clear).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) * A cache object is on two lists: an unsorted global list
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) * (cache_list) of cache objects; and a singly-linked list
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) * representing the local cache hierarchy, which is ordered by level
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) * (e.g. L1d -> L1i -> L2 -> L3).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) struct cache {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) struct device_node *ofnode; /* OF node for this cache, may be cpu */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) struct cpumask shared_cpu_map; /* online CPUs using this cache */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) int type; /* split cache disambiguation */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) int level; /* level not explicit in device tree */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) struct list_head list; /* global list of cache objects */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) struct cache *next_local; /* next cache of >= level */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) static DEFINE_PER_CPU(struct cache_dir *, cache_dir_pcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) /* traversal/modification of this list occurs only at cpu hotplug time;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) * access is serialized by cpu hotplug locking
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) static LIST_HEAD(cache_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) static struct cache_index_dir *kobj_to_cache_index_dir(struct kobject *k)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) return container_of(k, struct cache_index_dir, kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) static const char *cache_type_string(const struct cache *cache)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) return cache_type_info[cache->type].name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) static void cache_init(struct cache *cache, int type, int level,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) struct device_node *ofnode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) cache->type = type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) cache->level = level;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) cache->ofnode = of_node_get(ofnode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) INIT_LIST_HEAD(&cache->list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) list_add(&cache->list, &cache_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) static struct cache *new_cache(int type, int level, struct device_node *ofnode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) struct cache *cache;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) cache = kzalloc(sizeof(*cache), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) if (cache)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) cache_init(cache, type, level, ofnode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) return cache;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) static void release_cache_debugcheck(struct cache *cache)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) struct cache *iter;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) list_for_each_entry(iter, &cache_list, list)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) WARN_ONCE(iter->next_local == cache,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) "cache for %pOFP(%s) refers to cache for %pOFP(%s)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) iter->ofnode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) cache_type_string(iter),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) cache->ofnode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) cache_type_string(cache));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) static void release_cache(struct cache *cache)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) if (!cache)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) pr_debug("freeing L%d %s cache for %pOFP\n", cache->level,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) cache_type_string(cache), cache->ofnode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) release_cache_debugcheck(cache);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) list_del(&cache->list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) of_node_put(cache->ofnode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) kfree(cache);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) static void cache_cpu_set(struct cache *cache, int cpu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) struct cache *next = cache;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) while (next) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) WARN_ONCE(cpumask_test_cpu(cpu, &next->shared_cpu_map),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) "CPU %i already accounted in %pOFP(%s)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) cpu, next->ofnode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) cache_type_string(next));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) cpumask_set_cpu(cpu, &next->shared_cpu_map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) next = next->next_local;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) static int cache_size(const struct cache *cache, unsigned int *ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) const char *propname;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) const __be32 *cache_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) propname = cache_type_info[cache->type].size_prop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) cache_size = of_get_property(cache->ofnode, propname, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) if (!cache_size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) *ret = of_read_number(cache_size, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) static int cache_size_kb(const struct cache *cache, unsigned int *ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) unsigned int size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) if (cache_size(cache, &size))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) *ret = size / 1024;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) /* not cache_line_size() because that's a macro in include/linux/cache.h */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) static int cache_get_line_size(const struct cache *cache, unsigned int *ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) const __be32 *line_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) int i, lim;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) lim = ARRAY_SIZE(cache_type_info[cache->type].line_size_props);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) for (i = 0; i < lim; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) const char *propname;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) propname = cache_type_info[cache->type].line_size_props[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) line_size = of_get_property(cache->ofnode, propname, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) if (line_size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) if (!line_size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) *ret = of_read_number(line_size, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) static int cache_nr_sets(const struct cache *cache, unsigned int *ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) const char *propname;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) const __be32 *nr_sets;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) propname = cache_type_info[cache->type].nr_sets_prop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) nr_sets = of_get_property(cache->ofnode, propname, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) if (!nr_sets)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) *ret = of_read_number(nr_sets, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) static int cache_associativity(const struct cache *cache, unsigned int *ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) unsigned int line_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) unsigned int nr_sets;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) unsigned int size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) if (cache_nr_sets(cache, &nr_sets))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) /* If the cache is fully associative, there is no need to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) * check the other properties.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) if (nr_sets == 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) *ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) if (cache_get_line_size(cache, &line_size))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) if (cache_size(cache, &size))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) if (!(nr_sets > 0 && size > 0 && line_size > 0))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) *ret = (size / nr_sets) / line_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) err:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) /* helper for dealing with split caches */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) static struct cache *cache_find_first_sibling(struct cache *cache)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) struct cache *iter;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) if (cache->type == CACHE_TYPE_UNIFIED ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) cache->type == CACHE_TYPE_UNIFIED_D)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) return cache;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) list_for_each_entry(iter, &cache_list, list)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) if (iter->ofnode == cache->ofnode && iter->next_local == cache)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) return iter;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) return cache;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) /* return the first cache on a local list matching node */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) static struct cache *cache_lookup_by_node(const struct device_node *node)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) struct cache *cache = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) struct cache *iter;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) list_for_each_entry(iter, &cache_list, list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) if (iter->ofnode != node)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) cache = cache_find_first_sibling(iter);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) return cache;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) static bool cache_node_is_unified(const struct device_node *np)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) return of_get_property(np, "cache-unified", NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) * Unified caches can have two different sets of tags. Most embedded
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) * use cache-size, etc. for the unified cache size, but open firmware systems
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) * use d-cache-size, etc. Check on initialization for which type we have, and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) * return the appropriate structure type. Assume it's embedded if it isn't
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) * open firmware. If it's yet a 3rd type, then there will be missing entries
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) * in /sys/devices/system/cpu/cpu0/cache/index2/, and this code will need
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) * to be extended further.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) static int cache_is_unified_d(const struct device_node *np)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) return of_get_property(np,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) cache_type_info[CACHE_TYPE_UNIFIED_D].size_prop, NULL) ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) CACHE_TYPE_UNIFIED_D : CACHE_TYPE_UNIFIED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) static struct cache *cache_do_one_devnode_unified(struct device_node *node, int level)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) pr_debug("creating L%d ucache for %pOFP\n", level, node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) return new_cache(cache_is_unified_d(node), level, node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) static struct cache *cache_do_one_devnode_split(struct device_node *node,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) int level)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) struct cache *dcache, *icache;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) pr_debug("creating L%d dcache and icache for %pOFP\n", level,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) dcache = new_cache(CACHE_TYPE_DATA, level, node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) icache = new_cache(CACHE_TYPE_INSTRUCTION, level, node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) if (!dcache || !icache)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) dcache->next_local = icache;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) return dcache;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) err:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) release_cache(dcache);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) release_cache(icache);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) static struct cache *cache_do_one_devnode(struct device_node *node, int level)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) struct cache *cache;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) if (cache_node_is_unified(node))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) cache = cache_do_one_devnode_unified(node, level);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) cache = cache_do_one_devnode_split(node, level);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) return cache;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) static struct cache *cache_lookup_or_instantiate(struct device_node *node,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) int level)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) struct cache *cache;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) cache = cache_lookup_by_node(node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) WARN_ONCE(cache && cache->level != level,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) "cache level mismatch on lookup (got %d, expected %d)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) cache->level, level);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) if (!cache)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) cache = cache_do_one_devnode(node, level);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) return cache;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) static void link_cache_lists(struct cache *smaller, struct cache *bigger)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) while (smaller->next_local) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) if (smaller->next_local == bigger)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) return; /* already linked */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) smaller = smaller->next_local;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) smaller->next_local = bigger;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) * The cache->next_local list sorts by level ascending:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) * L1d -> L1i -> L2 -> L3 ...
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) WARN_ONCE((smaller->level == 1 && bigger->level > 2) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) (smaller->level > 1 && bigger->level != smaller->level + 1),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) "linking L%i cache %pOFP to L%i cache %pOFP; skipped a level?\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) smaller->level, smaller->ofnode, bigger->level, bigger->ofnode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) static void do_subsidiary_caches_debugcheck(struct cache *cache)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) WARN_ONCE(cache->level != 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) "instantiating cache chain from L%d %s cache for "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) "%pOFP instead of an L1\n", cache->level,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) cache_type_string(cache), cache->ofnode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) WARN_ONCE(!of_node_is_type(cache->ofnode, "cpu"),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) "instantiating cache chain from node %pOFP of type '%s' "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) "instead of a cpu node\n", cache->ofnode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) of_node_get_device_type(cache->ofnode));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) static void do_subsidiary_caches(struct cache *cache)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) struct device_node *subcache_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) int level = cache->level;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) do_subsidiary_caches_debugcheck(cache);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) while ((subcache_node = of_find_next_cache_node(cache->ofnode))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) struct cache *subcache;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) level++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) subcache = cache_lookup_or_instantiate(subcache_node, level);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) of_node_put(subcache_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) if (!subcache)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) link_cache_lists(cache, subcache);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) cache = subcache;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) static struct cache *cache_chain_instantiate(unsigned int cpu_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) struct device_node *cpu_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) struct cache *cpu_cache = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) pr_debug("creating cache object(s) for CPU %i\n", cpu_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) cpu_node = of_get_cpu_node(cpu_id, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) WARN_ONCE(!cpu_node, "no OF node found for CPU %i\n", cpu_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) if (!cpu_node)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) cpu_cache = cache_lookup_or_instantiate(cpu_node, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) if (!cpu_cache)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) do_subsidiary_caches(cpu_cache);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) cache_cpu_set(cpu_cache, cpu_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) of_node_put(cpu_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) return cpu_cache;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) static struct cache_dir *cacheinfo_create_cache_dir(unsigned int cpu_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) struct cache_dir *cache_dir;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) struct device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) struct kobject *kobj = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) dev = get_cpu_device(cpu_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) WARN_ONCE(!dev, "no dev for CPU %i\n", cpu_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) if (!dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) kobj = kobject_create_and_add("cache", &dev->kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) if (!kobj)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) cache_dir = kzalloc(sizeof(*cache_dir), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) if (!cache_dir)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) cache_dir->kobj = kobj;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) WARN_ON_ONCE(per_cpu(cache_dir_pcpu, cpu_id) != NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) per_cpu(cache_dir_pcpu, cpu_id) = cache_dir;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) return cache_dir;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) err:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) kobject_put(kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) static void cache_index_release(struct kobject *kobj)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) struct cache_index_dir *index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) index = kobj_to_cache_index_dir(kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) pr_debug("freeing index directory for L%d %s cache\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) index->cache->level, cache_type_string(index->cache));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) kfree(index);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) static ssize_t cache_index_show(struct kobject *k, struct attribute *attr, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) struct kobj_attribute *kobj_attr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) kobj_attr = container_of(attr, struct kobj_attribute, attr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) return kobj_attr->show(k, kobj_attr, buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) static struct cache *index_kobj_to_cache(struct kobject *k)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) struct cache_index_dir *index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) index = kobj_to_cache_index_dir(k);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) return index->cache;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) static ssize_t size_show(struct kobject *k, struct kobj_attribute *attr, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) unsigned int size_kb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) struct cache *cache;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) cache = index_kobj_to_cache(k);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) if (cache_size_kb(cache, &size_kb))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) return sprintf(buf, "%uK\n", size_kb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) static struct kobj_attribute cache_size_attr =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) __ATTR(size, 0444, size_show, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) static ssize_t line_size_show(struct kobject *k, struct kobj_attribute *attr, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) unsigned int line_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) struct cache *cache;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) cache = index_kobj_to_cache(k);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) if (cache_get_line_size(cache, &line_size))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) return sprintf(buf, "%u\n", line_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) static struct kobj_attribute cache_line_size_attr =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) __ATTR(coherency_line_size, 0444, line_size_show, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) static ssize_t nr_sets_show(struct kobject *k, struct kobj_attribute *attr, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) unsigned int nr_sets;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) struct cache *cache;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) cache = index_kobj_to_cache(k);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) if (cache_nr_sets(cache, &nr_sets))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) return sprintf(buf, "%u\n", nr_sets);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) static struct kobj_attribute cache_nr_sets_attr =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) __ATTR(number_of_sets, 0444, nr_sets_show, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) static ssize_t associativity_show(struct kobject *k, struct kobj_attribute *attr, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) unsigned int associativity;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) struct cache *cache;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) cache = index_kobj_to_cache(k);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) if (cache_associativity(cache, &associativity))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) return sprintf(buf, "%u\n", associativity);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) static struct kobj_attribute cache_assoc_attr =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) __ATTR(ways_of_associativity, 0444, associativity_show, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) static ssize_t type_show(struct kobject *k, struct kobj_attribute *attr, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) struct cache *cache;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) cache = index_kobj_to_cache(k);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) return sprintf(buf, "%s\n", cache_type_string(cache));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) static struct kobj_attribute cache_type_attr =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) __ATTR(type, 0444, type_show, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) static ssize_t level_show(struct kobject *k, struct kobj_attribute *attr, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) struct cache_index_dir *index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) struct cache *cache;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635) index = kobj_to_cache_index_dir(k);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) cache = index->cache;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) return sprintf(buf, "%d\n", cache->level);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) static struct kobj_attribute cache_level_attr =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) __ATTR(level, 0444, level_show, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) static unsigned int index_dir_to_cpu(struct cache_index_dir *index)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646) struct kobject *index_dir_kobj = &index->kobj;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) struct kobject *cache_dir_kobj = index_dir_kobj->parent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) struct kobject *cpu_dev_kobj = cache_dir_kobj->parent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649) struct device *dev = kobj_to_dev(cpu_dev_kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) return dev->id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) * On big-core systems, each core has two groups of CPUs each of which
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) * has its own L1-cache. The thread-siblings which share l1-cache with
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) * @cpu can be obtained via cpu_smallcore_mask().
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) static const struct cpumask *get_big_core_shared_cpu_map(int cpu, struct cache *cache)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) if (cache->level == 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) return cpu_smallcore_mask(cpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664) return &cache->shared_cpu_map;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) static ssize_t
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) show_shared_cpumap(struct kobject *k, struct kobj_attribute *attr, char *buf, bool list)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) struct cache_index_dir *index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) struct cache *cache;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) const struct cpumask *mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673) int cpu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) index = kobj_to_cache_index_dir(k);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) cache = index->cache;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678) if (has_big_cores) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) cpu = index_dir_to_cpu(index);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) mask = get_big_core_shared_cpu_map(cpu, cache);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) mask = &cache->shared_cpu_map;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) return cpumap_print_to_pagebuf(list, buf, mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688) static ssize_t shared_cpu_map_show(struct kobject *k, struct kobj_attribute *attr, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690) return show_shared_cpumap(k, attr, buf, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) static ssize_t shared_cpu_list_show(struct kobject *k, struct kobj_attribute *attr, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) return show_shared_cpumap(k, attr, buf, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698) static struct kobj_attribute cache_shared_cpu_map_attr =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699) __ATTR(shared_cpu_map, 0444, shared_cpu_map_show, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701) static struct kobj_attribute cache_shared_cpu_list_attr =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) __ATTR(shared_cpu_list, 0444, shared_cpu_list_show, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) /* Attributes which should always be created -- the kobject/sysfs core
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705) * does this automatically via kobj_type->default_attrs. This is the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) * minimum data required to uniquely identify a cache.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708) static struct attribute *cache_index_default_attrs[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709) &cache_type_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710) &cache_level_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) &cache_shared_cpu_map_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712) &cache_shared_cpu_list_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713) NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716) /* Attributes which should be created if the cache device node has the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717) * right properties -- see cacheinfo_create_index_opt_attrs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719) static struct kobj_attribute *cache_index_opt_attrs[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720) &cache_size_attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721) &cache_line_size_attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722) &cache_nr_sets_attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723) &cache_assoc_attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726) static const struct sysfs_ops cache_index_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727) .show = cache_index_show,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730) static struct kobj_type cache_index_type = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731) .release = cache_index_release,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732) .sysfs_ops = &cache_index_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733) .default_attrs = cache_index_default_attrs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736) static void cacheinfo_create_index_opt_attrs(struct cache_index_dir *dir)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738) const char *cache_type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739) struct cache *cache;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 740) char *buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 741) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 742)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 743) buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 744) if (!buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 745) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 746)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 747) cache = dir->cache;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 748) cache_type = cache_type_string(cache);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 749)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 750) /* We don't want to create an attribute that can't provide a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 751) * meaningful value. Check the return value of each optional
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 752) * attribute's ->show method before registering the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 753) * attribute.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 754) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 755) for (i = 0; i < ARRAY_SIZE(cache_index_opt_attrs); i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 756) struct kobj_attribute *attr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 757) ssize_t rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 758)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 759) attr = cache_index_opt_attrs[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 760)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 761) rc = attr->show(&dir->kobj, attr, buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 762) if (rc <= 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 763) pr_debug("not creating %s attribute for "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 764) "%pOFP(%s) (rc = %zd)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 765) attr->attr.name, cache->ofnode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 766) cache_type, rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 767) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 768) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 769) if (sysfs_create_file(&dir->kobj, &attr->attr))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 770) pr_debug("could not create %s attribute for %pOFP(%s)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 771) attr->attr.name, cache->ofnode, cache_type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 772) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 773)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 774) kfree(buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 775) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 776)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 777) static void cacheinfo_create_index_dir(struct cache *cache, int index,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 778) struct cache_dir *cache_dir)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 779) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 780) struct cache_index_dir *index_dir;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 781) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 782)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 783) index_dir = kzalloc(sizeof(*index_dir), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 784) if (!index_dir)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 785) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 786)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 787) index_dir->cache = cache;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 788)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 789) rc = kobject_init_and_add(&index_dir->kobj, &cache_index_type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 790) cache_dir->kobj, "index%d", index);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 791) if (rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 792) kobject_put(&index_dir->kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 793) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 794) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 795)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 796) index_dir->next = cache_dir->index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 797) cache_dir->index = index_dir;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 798)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 799) cacheinfo_create_index_opt_attrs(index_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 800) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 801)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 802) static void cacheinfo_sysfs_populate(unsigned int cpu_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 803) struct cache *cache_list)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 804) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 805) struct cache_dir *cache_dir;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 806) struct cache *cache;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 807) int index = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 808)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 809) cache_dir = cacheinfo_create_cache_dir(cpu_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 810) if (!cache_dir)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 811) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 812)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 813) cache = cache_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 814) while (cache) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 815) cacheinfo_create_index_dir(cache, index, cache_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 816) index++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 817) cache = cache->next_local;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 818) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 819) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 820)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 821) void cacheinfo_cpu_online(unsigned int cpu_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 822) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 823) struct cache *cache;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 824)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 825) cache = cache_chain_instantiate(cpu_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 826) if (!cache)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 827) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 828)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 829) cacheinfo_sysfs_populate(cpu_id, cache);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 830) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 831)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 832) /* functions needed to remove cache entry for cpu offline or suspend/resume */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 833)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 834) #if (defined(CONFIG_PPC_PSERIES) && defined(CONFIG_SUSPEND)) || \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 835) defined(CONFIG_HOTPLUG_CPU)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 836)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 837) static struct cache *cache_lookup_by_cpu(unsigned int cpu_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 838) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 839) struct device_node *cpu_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 840) struct cache *cache;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 841)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 842) cpu_node = of_get_cpu_node(cpu_id, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 843) WARN_ONCE(!cpu_node, "no OF node found for CPU %i\n", cpu_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 844) if (!cpu_node)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 845) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 846)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 847) cache = cache_lookup_by_node(cpu_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 848) of_node_put(cpu_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 849)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 850) return cache;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 851) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 852)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 853) static void remove_index_dirs(struct cache_dir *cache_dir)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 854) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 855) struct cache_index_dir *index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 856)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 857) index = cache_dir->index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 858)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 859) while (index) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 860) struct cache_index_dir *next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 861)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 862) next = index->next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 863) kobject_put(&index->kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 864) index = next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 865) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 866) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 867)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 868) static void remove_cache_dir(struct cache_dir *cache_dir)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 869) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 870) remove_index_dirs(cache_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 871)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 872) /* Remove cache dir from sysfs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 873) kobject_del(cache_dir->kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 874)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 875) kobject_put(cache_dir->kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 876)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 877) kfree(cache_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 878) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 879)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 880) static void cache_cpu_clear(struct cache *cache, int cpu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 881) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 882) while (cache) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 883) struct cache *next = cache->next_local;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 884)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 885) WARN_ONCE(!cpumask_test_cpu(cpu, &cache->shared_cpu_map),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 886) "CPU %i not accounted in %pOFP(%s)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 887) cpu, cache->ofnode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 888) cache_type_string(cache));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 889)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 890) cpumask_clear_cpu(cpu, &cache->shared_cpu_map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 891)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 892) /* Release the cache object if all the cpus using it
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 893) * are offline */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 894) if (cpumask_empty(&cache->shared_cpu_map))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 895) release_cache(cache);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 896)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 897) cache = next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 898) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 899) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 900)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 901) void cacheinfo_cpu_offline(unsigned int cpu_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 902) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 903) struct cache_dir *cache_dir;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 904) struct cache *cache;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 905)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 906) /* Prevent userspace from seeing inconsistent state - remove
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 907) * the sysfs hierarchy first */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 908) cache_dir = per_cpu(cache_dir_pcpu, cpu_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 909)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 910) /* careful, sysfs population may have failed */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 911) if (cache_dir)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 912) remove_cache_dir(cache_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 913)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 914) per_cpu(cache_dir_pcpu, cpu_id) = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 915)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 916) /* clear the CPU's bit in its cache chain, possibly freeing
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 917) * cache objects */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 918) cache = cache_lookup_by_cpu(cpu_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 919) if (cache)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 920) cache_cpu_clear(cache, cpu_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 921) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 922)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 923) void cacheinfo_teardown(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 924) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 925) unsigned int cpu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 926)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 927) lockdep_assert_cpus_held();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 928)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 929) for_each_online_cpu(cpu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 930) cacheinfo_cpu_offline(cpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 931) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 932)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 933) void cacheinfo_rebuild(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 934) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 935) unsigned int cpu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 936)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 937) lockdep_assert_cpus_held();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 938)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 939) for_each_online_cpu(cpu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 940) cacheinfo_cpu_online(cpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 941) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 942)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 943) #endif /* (CONFIG_PPC_PSERIES && CONFIG_SUSPEND) || CONFIG_HOTPLUG_CPU */
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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