Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Routines to indentify caches on Intel CPU. |
| 3 | * |
| 4 | * Changes: |
| 5 | * Venkatesh Pallipadi : Adding cache identification through cpuid(4) |
Ashok Raj | 1aa1a9f | 2005-10-30 14:59:50 -0800 | [diff] [blame] | 6 | * Ashok Raj <ashok.raj@intel.com>: Work with CPU hotplug infrastructure. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7 | */ |
| 8 | |
| 9 | #include <linux/init.h> |
| 10 | #include <linux/slab.h> |
| 11 | #include <linux/device.h> |
| 12 | #include <linux/compiler.h> |
| 13 | #include <linux/cpu.h> |
Tim Schmielau | 4e57b68 | 2005-10-30 15:03:48 -0800 | [diff] [blame] | 14 | #include <linux/sched.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 15 | |
| 16 | #include <asm/processor.h> |
| 17 | #include <asm/smp.h> |
| 18 | |
| 19 | #define LVL_1_INST 1 |
| 20 | #define LVL_1_DATA 2 |
| 21 | #define LVL_2 3 |
| 22 | #define LVL_3 4 |
| 23 | #define LVL_TRACE 5 |
| 24 | |
| 25 | struct _cache_table |
| 26 | { |
| 27 | unsigned char descriptor; |
| 28 | char cache_type; |
| 29 | short size; |
| 30 | }; |
| 31 | |
| 32 | /* all the cache descriptor types we care about (no TLB or trace cache entries) */ |
Ashok Raj | 1aa1a9f | 2005-10-30 14:59:50 -0800 | [diff] [blame] | 33 | static struct _cache_table cache_table[] __cpuinitdata = |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | { |
| 35 | { 0x06, LVL_1_INST, 8 }, /* 4-way set assoc, 32 byte line size */ |
| 36 | { 0x08, LVL_1_INST, 16 }, /* 4-way set assoc, 32 byte line size */ |
| 37 | { 0x0a, LVL_1_DATA, 8 }, /* 2 way set assoc, 32 byte line size */ |
| 38 | { 0x0c, LVL_1_DATA, 16 }, /* 4-way set assoc, 32 byte line size */ |
| 39 | { 0x22, LVL_3, 512 }, /* 4-way set assoc, sectored cache, 64 byte line size */ |
| 40 | { 0x23, LVL_3, 1024 }, /* 8-way set assoc, sectored cache, 64 byte line size */ |
| 41 | { 0x25, LVL_3, 2048 }, /* 8-way set assoc, sectored cache, 64 byte line size */ |
| 42 | { 0x29, LVL_3, 4096 }, /* 8-way set assoc, sectored cache, 64 byte line size */ |
| 43 | { 0x2c, LVL_1_DATA, 32 }, /* 8-way set assoc, 64 byte line size */ |
| 44 | { 0x30, LVL_1_INST, 32 }, /* 8-way set assoc, 64 byte line size */ |
| 45 | { 0x39, LVL_2, 128 }, /* 4-way set assoc, sectored cache, 64 byte line size */ |
Dave Jones | 6fe8f47 | 2006-01-26 22:40:40 -0800 | [diff] [blame] | 46 | { 0x3a, LVL_2, 192 }, /* 6-way set assoc, sectored cache, 64 byte line size */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | { 0x3b, LVL_2, 128 }, /* 2-way set assoc, sectored cache, 64 byte line size */ |
| 48 | { 0x3c, LVL_2, 256 }, /* 4-way set assoc, sectored cache, 64 byte line size */ |
Dave Jones | 6fe8f47 | 2006-01-26 22:40:40 -0800 | [diff] [blame] | 49 | { 0x3d, LVL_2, 384 }, /* 6-way set assoc, sectored cache, 64 byte line size */ |
| 50 | { 0x3e, LVL_2, 512 }, /* 4-way set assoc, sectored cache, 64 byte line size */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | { 0x41, LVL_2, 128 }, /* 4-way set assoc, 32 byte line size */ |
| 52 | { 0x42, LVL_2, 256 }, /* 4-way set assoc, 32 byte line size */ |
| 53 | { 0x43, LVL_2, 512 }, /* 4-way set assoc, 32 byte line size */ |
| 54 | { 0x44, LVL_2, 1024 }, /* 4-way set assoc, 32 byte line size */ |
| 55 | { 0x45, LVL_2, 2048 }, /* 4-way set assoc, 32 byte line size */ |
Dave Jones | 6fe8f47 | 2006-01-26 22:40:40 -0800 | [diff] [blame] | 56 | { 0x46, LVL_3, 4096 }, /* 4-way set assoc, 64 byte line size */ |
| 57 | { 0x47, LVL_3, 8192 }, /* 8-way set assoc, 64 byte line size */ |
| 58 | { 0x49, LVL_3, 4096 }, /* 16-way set assoc, 64 byte line size */ |
| 59 | { 0x4a, LVL_3, 6144 }, /* 12-way set assoc, 64 byte line size */ |
| 60 | { 0x4b, LVL_3, 8192 }, /* 16-way set assoc, 64 byte line size */ |
| 61 | { 0x4c, LVL_3, 12288 }, /* 12-way set assoc, 64 byte line size */ |
| 62 | { 0x4d, LVL_3, 16384 }, /* 16-way set assoc, 64 byte line size */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | { 0x60, LVL_1_DATA, 16 }, /* 8-way set assoc, sectored cache, 64 byte line size */ |
| 64 | { 0x66, LVL_1_DATA, 8 }, /* 4-way set assoc, sectored cache, 64 byte line size */ |
| 65 | { 0x67, LVL_1_DATA, 16 }, /* 4-way set assoc, sectored cache, 64 byte line size */ |
| 66 | { 0x68, LVL_1_DATA, 32 }, /* 4-way set assoc, sectored cache, 64 byte line size */ |
| 67 | { 0x70, LVL_TRACE, 12 }, /* 8-way set assoc */ |
| 68 | { 0x71, LVL_TRACE, 16 }, /* 8-way set assoc */ |
| 69 | { 0x72, LVL_TRACE, 32 }, /* 8-way set assoc */ |
Dave Jones | 6fe8f47 | 2006-01-26 22:40:40 -0800 | [diff] [blame] | 70 | { 0x73, LVL_TRACE, 64 }, /* 8-way set assoc */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | { 0x78, LVL_2, 1024 }, /* 4-way set assoc, 64 byte line size */ |
| 72 | { 0x79, LVL_2, 128 }, /* 8-way set assoc, sectored cache, 64 byte line size */ |
| 73 | { 0x7a, LVL_2, 256 }, /* 8-way set assoc, sectored cache, 64 byte line size */ |
| 74 | { 0x7b, LVL_2, 512 }, /* 8-way set assoc, sectored cache, 64 byte line size */ |
| 75 | { 0x7c, LVL_2, 1024 }, /* 8-way set assoc, sectored cache, 64 byte line size */ |
| 76 | { 0x7d, LVL_2, 2048 }, /* 8-way set assoc, 64 byte line size */ |
| 77 | { 0x7f, LVL_2, 512 }, /* 2-way set assoc, 64 byte line size */ |
| 78 | { 0x82, LVL_2, 256 }, /* 8-way set assoc, 32 byte line size */ |
| 79 | { 0x83, LVL_2, 512 }, /* 8-way set assoc, 32 byte line size */ |
| 80 | { 0x84, LVL_2, 1024 }, /* 8-way set assoc, 32 byte line size */ |
| 81 | { 0x85, LVL_2, 2048 }, /* 8-way set assoc, 32 byte line size */ |
| 82 | { 0x86, LVL_2, 512 }, /* 4-way set assoc, 64 byte line size */ |
| 83 | { 0x87, LVL_2, 1024 }, /* 8-way set assoc, 64 byte line size */ |
| 84 | { 0x00, 0, 0} |
| 85 | }; |
| 86 | |
| 87 | |
| 88 | enum _cache_type |
| 89 | { |
| 90 | CACHE_TYPE_NULL = 0, |
| 91 | CACHE_TYPE_DATA = 1, |
| 92 | CACHE_TYPE_INST = 2, |
| 93 | CACHE_TYPE_UNIFIED = 3 |
| 94 | }; |
| 95 | |
| 96 | union _cpuid4_leaf_eax { |
| 97 | struct { |
| 98 | enum _cache_type type:5; |
| 99 | unsigned int level:3; |
| 100 | unsigned int is_self_initializing:1; |
| 101 | unsigned int is_fully_associative:1; |
| 102 | unsigned int reserved:4; |
| 103 | unsigned int num_threads_sharing:12; |
| 104 | unsigned int num_cores_on_die:6; |
| 105 | } split; |
| 106 | u32 full; |
| 107 | }; |
| 108 | |
| 109 | union _cpuid4_leaf_ebx { |
| 110 | struct { |
| 111 | unsigned int coherency_line_size:12; |
| 112 | unsigned int physical_line_partition:10; |
| 113 | unsigned int ways_of_associativity:10; |
| 114 | } split; |
| 115 | u32 full; |
| 116 | }; |
| 117 | |
| 118 | union _cpuid4_leaf_ecx { |
| 119 | struct { |
| 120 | unsigned int number_of_sets:32; |
| 121 | } split; |
| 122 | u32 full; |
| 123 | }; |
| 124 | |
| 125 | struct _cpuid4_info { |
| 126 | union _cpuid4_leaf_eax eax; |
| 127 | union _cpuid4_leaf_ebx ebx; |
| 128 | union _cpuid4_leaf_ecx ecx; |
| 129 | unsigned long size; |
| 130 | cpumask_t shared_cpu_map; |
| 131 | }; |
| 132 | |
Adrian Bunk | 70ffc71 | 2005-05-27 12:52:59 -0700 | [diff] [blame] | 133 | static unsigned short num_cache_leaves; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 134 | |
Ashok Raj | 1aa1a9f | 2005-10-30 14:59:50 -0800 | [diff] [blame] | 135 | static int __cpuinit cpuid4_cache_lookup(int index, struct _cpuid4_info *this_leaf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | { |
| 137 | unsigned int eax, ebx, ecx, edx; |
| 138 | union _cpuid4_leaf_eax cache_eax; |
| 139 | |
| 140 | cpuid_count(4, index, &eax, &ebx, &ecx, &edx); |
| 141 | cache_eax.full = eax; |
| 142 | if (cache_eax.split.type == CACHE_TYPE_NULL) |
Andi Kleen | e2cac78 | 2005-07-28 21:15:46 -0700 | [diff] [blame] | 143 | return -EIO; /* better error ? */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 144 | |
| 145 | this_leaf->eax.full = eax; |
| 146 | this_leaf->ebx.full = ebx; |
| 147 | this_leaf->ecx.full = ecx; |
| 148 | this_leaf->size = (this_leaf->ecx.split.number_of_sets + 1) * |
| 149 | (this_leaf->ebx.split.coherency_line_size + 1) * |
| 150 | (this_leaf->ebx.split.physical_line_partition + 1) * |
| 151 | (this_leaf->ebx.split.ways_of_associativity + 1); |
| 152 | return 0; |
| 153 | } |
| 154 | |
Chuck Ebbert | fe38d85 | 2006-02-04 23:28:03 -0800 | [diff] [blame] | 155 | /* will only be called once; __init is safe here */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 156 | static int __init find_num_cache_leaves(void) |
| 157 | { |
| 158 | unsigned int eax, ebx, ecx, edx; |
| 159 | union _cpuid4_leaf_eax cache_eax; |
Siddha, Suresh B | d16aafff | 2005-10-30 14:59:30 -0800 | [diff] [blame] | 160 | int i = -1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | |
Siddha, Suresh B | d16aafff | 2005-10-30 14:59:30 -0800 | [diff] [blame] | 162 | do { |
| 163 | ++i; |
| 164 | /* Do cpuid(4) loop to find out num_cache_leaves */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 165 | cpuid_count(4, i, &eax, &ebx, &ecx, &edx); |
| 166 | cache_eax.full = eax; |
Siddha, Suresh B | d16aafff | 2005-10-30 14:59:30 -0800 | [diff] [blame] | 167 | } while (cache_eax.split.type != CACHE_TYPE_NULL); |
| 168 | return i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | } |
| 170 | |
Ashok Raj | 1aa1a9f | 2005-10-30 14:59:50 -0800 | [diff] [blame] | 171 | unsigned int __cpuinit init_intel_cacheinfo(struct cpuinfo_x86 *c) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 172 | { |
| 173 | unsigned int trace = 0, l1i = 0, l1d = 0, l2 = 0, l3 = 0; /* Cache sizes */ |
| 174 | unsigned int new_l1d = 0, new_l1i = 0; /* Cache sizes from cpuid(4) */ |
| 175 | unsigned int new_l2 = 0, new_l3 = 0, i; /* Cache sizes from cpuid(4) */ |
| 176 | |
| 177 | if (c->cpuid_level > 4) { |
| 178 | static int is_initialized; |
| 179 | |
| 180 | if (is_initialized == 0) { |
| 181 | /* Init num_cache_leaves from boot CPU */ |
| 182 | num_cache_leaves = find_num_cache_leaves(); |
| 183 | is_initialized++; |
| 184 | } |
| 185 | |
| 186 | /* |
| 187 | * Whenever possible use cpuid(4), deterministic cache |
| 188 | * parameters cpuid leaf to find the cache details |
| 189 | */ |
| 190 | for (i = 0; i < num_cache_leaves; i++) { |
| 191 | struct _cpuid4_info this_leaf; |
| 192 | |
| 193 | int retval; |
| 194 | |
| 195 | retval = cpuid4_cache_lookup(i, &this_leaf); |
| 196 | if (retval >= 0) { |
| 197 | switch(this_leaf.eax.split.level) { |
| 198 | case 1: |
| 199 | if (this_leaf.eax.split.type == |
| 200 | CACHE_TYPE_DATA) |
| 201 | new_l1d = this_leaf.size/1024; |
| 202 | else if (this_leaf.eax.split.type == |
| 203 | CACHE_TYPE_INST) |
| 204 | new_l1i = this_leaf.size/1024; |
| 205 | break; |
| 206 | case 2: |
| 207 | new_l2 = this_leaf.size/1024; |
| 208 | break; |
| 209 | case 3: |
| 210 | new_l3 = this_leaf.size/1024; |
| 211 | break; |
| 212 | default: |
| 213 | break; |
| 214 | } |
| 215 | } |
| 216 | } |
| 217 | } |
| 218 | if (c->cpuid_level > 1) { |
| 219 | /* supports eax=2 call */ |
| 220 | int i, j, n; |
| 221 | int regs[4]; |
| 222 | unsigned char *dp = (unsigned char *)regs; |
| 223 | |
| 224 | /* Number of times to iterate */ |
| 225 | n = cpuid_eax(2) & 0xFF; |
| 226 | |
| 227 | for ( i = 0 ; i < n ; i++ ) { |
| 228 | cpuid(2, ®s[0], ®s[1], ®s[2], ®s[3]); |
| 229 | |
| 230 | /* If bit 31 is set, this is an unknown format */ |
| 231 | for ( j = 0 ; j < 3 ; j++ ) { |
| 232 | if ( regs[j] < 0 ) regs[j] = 0; |
| 233 | } |
| 234 | |
| 235 | /* Byte 0 is level count, not a descriptor */ |
| 236 | for ( j = 1 ; j < 16 ; j++ ) { |
| 237 | unsigned char des = dp[j]; |
| 238 | unsigned char k = 0; |
| 239 | |
| 240 | /* look up this descriptor in the table */ |
| 241 | while (cache_table[k].descriptor != 0) |
| 242 | { |
| 243 | if (cache_table[k].descriptor == des) { |
| 244 | switch (cache_table[k].cache_type) { |
| 245 | case LVL_1_INST: |
| 246 | l1i += cache_table[k].size; |
| 247 | break; |
| 248 | case LVL_1_DATA: |
| 249 | l1d += cache_table[k].size; |
| 250 | break; |
| 251 | case LVL_2: |
| 252 | l2 += cache_table[k].size; |
| 253 | break; |
| 254 | case LVL_3: |
| 255 | l3 += cache_table[k].size; |
| 256 | break; |
| 257 | case LVL_TRACE: |
| 258 | trace += cache_table[k].size; |
| 259 | break; |
| 260 | } |
| 261 | |
| 262 | break; |
| 263 | } |
| 264 | |
| 265 | k++; |
| 266 | } |
| 267 | } |
| 268 | } |
| 269 | |
| 270 | if (new_l1d) |
| 271 | l1d = new_l1d; |
| 272 | |
| 273 | if (new_l1i) |
| 274 | l1i = new_l1i; |
| 275 | |
| 276 | if (new_l2) |
| 277 | l2 = new_l2; |
| 278 | |
| 279 | if (new_l3) |
| 280 | l3 = new_l3; |
| 281 | |
| 282 | if ( trace ) |
| 283 | printk (KERN_INFO "CPU: Trace cache: %dK uops", trace); |
| 284 | else if ( l1i ) |
| 285 | printk (KERN_INFO "CPU: L1 I cache: %dK", l1i); |
| 286 | if ( l1d ) |
| 287 | printk(", L1 D cache: %dK\n", l1d); |
| 288 | else |
| 289 | printk("\n"); |
| 290 | if ( l2 ) |
| 291 | printk(KERN_INFO "CPU: L2 cache: %dK\n", l2); |
| 292 | if ( l3 ) |
| 293 | printk(KERN_INFO "CPU: L3 cache: %dK\n", l3); |
| 294 | |
Venkatesh Pallipadi | 30037f6 | 2005-10-30 14:59:38 -0800 | [diff] [blame] | 295 | c->x86_cache_size = l3 ? l3 : (l2 ? l2 : (l1i+l1d)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 296 | } |
| 297 | |
| 298 | return l2; |
| 299 | } |
| 300 | |
| 301 | /* pointer to _cpuid4_info array (for each cache leaf) */ |
| 302 | static struct _cpuid4_info *cpuid4_info[NR_CPUS]; |
| 303 | #define CPUID4_INFO_IDX(x,y) (&((cpuid4_info[x])[y])) |
| 304 | |
| 305 | #ifdef CONFIG_SMP |
Ashok Raj | 1aa1a9f | 2005-10-30 14:59:50 -0800 | [diff] [blame] | 306 | static void __cpuinit cache_shared_cpu_map_setup(unsigned int cpu, int index) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 307 | { |
Siddha, Suresh B | 2b09187 | 2005-11-05 17:25:54 +0100 | [diff] [blame] | 308 | struct _cpuid4_info *this_leaf, *sibling_leaf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 309 | unsigned long num_threads_sharing; |
Siddha, Suresh B | 2b09187 | 2005-11-05 17:25:54 +0100 | [diff] [blame] | 310 | int index_msb, i; |
| 311 | struct cpuinfo_x86 *c = cpu_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 312 | |
| 313 | this_leaf = CPUID4_INFO_IDX(cpu, index); |
| 314 | num_threads_sharing = 1 + this_leaf->eax.split.num_threads_sharing; |
| 315 | |
| 316 | if (num_threads_sharing == 1) |
| 317 | cpu_set(cpu, this_leaf->shared_cpu_map); |
Siddha, Suresh B | 2b09187 | 2005-11-05 17:25:54 +0100 | [diff] [blame] | 318 | else { |
| 319 | index_msb = get_count_order(num_threads_sharing); |
| 320 | |
| 321 | for_each_online_cpu(i) { |
| 322 | if (c[i].apicid >> index_msb == |
| 323 | c[cpu].apicid >> index_msb) { |
| 324 | cpu_set(i, this_leaf->shared_cpu_map); |
| 325 | if (i != cpu && cpuid4_info[i]) { |
| 326 | sibling_leaf = CPUID4_INFO_IDX(i, index); |
| 327 | cpu_set(cpu, sibling_leaf->shared_cpu_map); |
| 328 | } |
| 329 | } |
| 330 | } |
| 331 | } |
| 332 | } |
Chuck Ebbert | 3bc9b76 | 2006-03-23 02:59:33 -0800 | [diff] [blame^] | 333 | static void __cpuinit cache_remove_shared_cpu_map(unsigned int cpu, int index) |
Siddha, Suresh B | 2b09187 | 2005-11-05 17:25:54 +0100 | [diff] [blame] | 334 | { |
| 335 | struct _cpuid4_info *this_leaf, *sibling_leaf; |
| 336 | int sibling; |
| 337 | |
| 338 | this_leaf = CPUID4_INFO_IDX(cpu, index); |
| 339 | for_each_cpu_mask(sibling, this_leaf->shared_cpu_map) { |
| 340 | sibling_leaf = CPUID4_INFO_IDX(sibling, index); |
| 341 | cpu_clear(cpu, sibling_leaf->shared_cpu_map); |
| 342 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 343 | } |
| 344 | #else |
| 345 | static void __init cache_shared_cpu_map_setup(unsigned int cpu, int index) {} |
Siddha, Suresh B | 2b09187 | 2005-11-05 17:25:54 +0100 | [diff] [blame] | 346 | static void __init cache_remove_shared_cpu_map(unsigned int cpu, int index) {} |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 347 | #endif |
| 348 | |
| 349 | static void free_cache_attributes(unsigned int cpu) |
| 350 | { |
| 351 | kfree(cpuid4_info[cpu]); |
| 352 | cpuid4_info[cpu] = NULL; |
| 353 | } |
| 354 | |
Ashok Raj | 1aa1a9f | 2005-10-30 14:59:50 -0800 | [diff] [blame] | 355 | static int __cpuinit detect_cache_attributes(unsigned int cpu) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 356 | { |
| 357 | struct _cpuid4_info *this_leaf; |
| 358 | unsigned long j; |
| 359 | int retval; |
Andi Kleen | e2cac78 | 2005-07-28 21:15:46 -0700 | [diff] [blame] | 360 | cpumask_t oldmask; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 361 | |
| 362 | if (num_cache_leaves == 0) |
| 363 | return -ENOENT; |
| 364 | |
| 365 | cpuid4_info[cpu] = kmalloc( |
| 366 | sizeof(struct _cpuid4_info) * num_cache_leaves, GFP_KERNEL); |
| 367 | if (unlikely(cpuid4_info[cpu] == NULL)) |
| 368 | return -ENOMEM; |
| 369 | memset(cpuid4_info[cpu], 0, |
| 370 | sizeof(struct _cpuid4_info) * num_cache_leaves); |
| 371 | |
Andi Kleen | e2cac78 | 2005-07-28 21:15:46 -0700 | [diff] [blame] | 372 | oldmask = current->cpus_allowed; |
| 373 | retval = set_cpus_allowed(current, cpumask_of_cpu(cpu)); |
| 374 | if (retval) |
| 375 | goto out; |
| 376 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 377 | /* Do cpuid and store the results */ |
Andi Kleen | e2cac78 | 2005-07-28 21:15:46 -0700 | [diff] [blame] | 378 | retval = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 379 | for (j = 0; j < num_cache_leaves; j++) { |
| 380 | this_leaf = CPUID4_INFO_IDX(cpu, j); |
| 381 | retval = cpuid4_cache_lookup(j, this_leaf); |
| 382 | if (unlikely(retval < 0)) |
Andi Kleen | e2cac78 | 2005-07-28 21:15:46 -0700 | [diff] [blame] | 383 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 384 | cache_shared_cpu_map_setup(cpu, j); |
| 385 | } |
Andi Kleen | e2cac78 | 2005-07-28 21:15:46 -0700 | [diff] [blame] | 386 | set_cpus_allowed(current, oldmask); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 387 | |
Andi Kleen | e2cac78 | 2005-07-28 21:15:46 -0700 | [diff] [blame] | 388 | out: |
| 389 | if (retval) |
| 390 | free_cache_attributes(cpu); |
| 391 | return retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 392 | } |
| 393 | |
| 394 | #ifdef CONFIG_SYSFS |
| 395 | |
| 396 | #include <linux/kobject.h> |
| 397 | #include <linux/sysfs.h> |
| 398 | |
| 399 | extern struct sysdev_class cpu_sysdev_class; /* from drivers/base/cpu.c */ |
| 400 | |
| 401 | /* pointer to kobject for cpuX/cache */ |
| 402 | static struct kobject * cache_kobject[NR_CPUS]; |
| 403 | |
| 404 | struct _index_kobject { |
| 405 | struct kobject kobj; |
| 406 | unsigned int cpu; |
| 407 | unsigned short index; |
| 408 | }; |
| 409 | |
| 410 | /* pointer to array of kobjects for cpuX/cache/indexY */ |
| 411 | static struct _index_kobject *index_kobject[NR_CPUS]; |
| 412 | #define INDEX_KOBJECT_PTR(x,y) (&((index_kobject[x])[y])) |
| 413 | |
| 414 | #define show_one_plus(file_name, object, val) \ |
| 415 | static ssize_t show_##file_name \ |
| 416 | (struct _cpuid4_info *this_leaf, char *buf) \ |
| 417 | { \ |
| 418 | return sprintf (buf, "%lu\n", (unsigned long)this_leaf->object + val); \ |
| 419 | } |
| 420 | |
| 421 | show_one_plus(level, eax.split.level, 0); |
| 422 | show_one_plus(coherency_line_size, ebx.split.coherency_line_size, 1); |
| 423 | show_one_plus(physical_line_partition, ebx.split.physical_line_partition, 1); |
| 424 | show_one_plus(ways_of_associativity, ebx.split.ways_of_associativity, 1); |
| 425 | show_one_plus(number_of_sets, ecx.split.number_of_sets, 1); |
| 426 | |
| 427 | static ssize_t show_size(struct _cpuid4_info *this_leaf, char *buf) |
| 428 | { |
| 429 | return sprintf (buf, "%luK\n", this_leaf->size / 1024); |
| 430 | } |
| 431 | |
| 432 | static ssize_t show_shared_cpu_map(struct _cpuid4_info *this_leaf, char *buf) |
| 433 | { |
| 434 | char mask_str[NR_CPUS]; |
| 435 | cpumask_scnprintf(mask_str, NR_CPUS, this_leaf->shared_cpu_map); |
| 436 | return sprintf(buf, "%s\n", mask_str); |
| 437 | } |
| 438 | |
| 439 | static ssize_t show_type(struct _cpuid4_info *this_leaf, char *buf) { |
| 440 | switch(this_leaf->eax.split.type) { |
| 441 | case CACHE_TYPE_DATA: |
| 442 | return sprintf(buf, "Data\n"); |
| 443 | break; |
| 444 | case CACHE_TYPE_INST: |
| 445 | return sprintf(buf, "Instruction\n"); |
| 446 | break; |
| 447 | case CACHE_TYPE_UNIFIED: |
| 448 | return sprintf(buf, "Unified\n"); |
| 449 | break; |
| 450 | default: |
| 451 | return sprintf(buf, "Unknown\n"); |
| 452 | break; |
| 453 | } |
| 454 | } |
| 455 | |
| 456 | struct _cache_attr { |
| 457 | struct attribute attr; |
| 458 | ssize_t (*show)(struct _cpuid4_info *, char *); |
| 459 | ssize_t (*store)(struct _cpuid4_info *, const char *, size_t count); |
| 460 | }; |
| 461 | |
| 462 | #define define_one_ro(_name) \ |
| 463 | static struct _cache_attr _name = \ |
| 464 | __ATTR(_name, 0444, show_##_name, NULL) |
| 465 | |
| 466 | define_one_ro(level); |
| 467 | define_one_ro(type); |
| 468 | define_one_ro(coherency_line_size); |
| 469 | define_one_ro(physical_line_partition); |
| 470 | define_one_ro(ways_of_associativity); |
| 471 | define_one_ro(number_of_sets); |
| 472 | define_one_ro(size); |
| 473 | define_one_ro(shared_cpu_map); |
| 474 | |
| 475 | static struct attribute * default_attrs[] = { |
| 476 | &type.attr, |
| 477 | &level.attr, |
| 478 | &coherency_line_size.attr, |
| 479 | &physical_line_partition.attr, |
| 480 | &ways_of_associativity.attr, |
| 481 | &number_of_sets.attr, |
| 482 | &size.attr, |
| 483 | &shared_cpu_map.attr, |
| 484 | NULL |
| 485 | }; |
| 486 | |
| 487 | #define to_object(k) container_of(k, struct _index_kobject, kobj) |
| 488 | #define to_attr(a) container_of(a, struct _cache_attr, attr) |
| 489 | |
| 490 | static ssize_t show(struct kobject * kobj, struct attribute * attr, char * buf) |
| 491 | { |
| 492 | struct _cache_attr *fattr = to_attr(attr); |
| 493 | struct _index_kobject *this_leaf = to_object(kobj); |
| 494 | ssize_t ret; |
| 495 | |
| 496 | ret = fattr->show ? |
| 497 | fattr->show(CPUID4_INFO_IDX(this_leaf->cpu, this_leaf->index), |
| 498 | buf) : |
| 499 | 0; |
| 500 | return ret; |
| 501 | } |
| 502 | |
| 503 | static ssize_t store(struct kobject * kobj, struct attribute * attr, |
| 504 | const char * buf, size_t count) |
| 505 | { |
| 506 | return 0; |
| 507 | } |
| 508 | |
| 509 | static struct sysfs_ops sysfs_ops = { |
| 510 | .show = show, |
| 511 | .store = store, |
| 512 | }; |
| 513 | |
| 514 | static struct kobj_type ktype_cache = { |
| 515 | .sysfs_ops = &sysfs_ops, |
| 516 | .default_attrs = default_attrs, |
| 517 | }; |
| 518 | |
| 519 | static struct kobj_type ktype_percpu_entry = { |
| 520 | .sysfs_ops = &sysfs_ops, |
| 521 | }; |
| 522 | |
| 523 | static void cpuid4_cache_sysfs_exit(unsigned int cpu) |
| 524 | { |
| 525 | kfree(cache_kobject[cpu]); |
| 526 | kfree(index_kobject[cpu]); |
| 527 | cache_kobject[cpu] = NULL; |
| 528 | index_kobject[cpu] = NULL; |
| 529 | free_cache_attributes(cpu); |
| 530 | } |
| 531 | |
Ashok Raj | 1aa1a9f | 2005-10-30 14:59:50 -0800 | [diff] [blame] | 532 | static int __cpuinit cpuid4_cache_sysfs_init(unsigned int cpu) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 533 | { |
| 534 | |
| 535 | if (num_cache_leaves == 0) |
| 536 | return -ENOENT; |
| 537 | |
| 538 | detect_cache_attributes(cpu); |
| 539 | if (cpuid4_info[cpu] == NULL) |
| 540 | return -ENOENT; |
| 541 | |
| 542 | /* Allocate all required memory */ |
| 543 | cache_kobject[cpu] = kmalloc(sizeof(struct kobject), GFP_KERNEL); |
| 544 | if (unlikely(cache_kobject[cpu] == NULL)) |
| 545 | goto err_out; |
| 546 | memset(cache_kobject[cpu], 0, sizeof(struct kobject)); |
| 547 | |
| 548 | index_kobject[cpu] = kmalloc( |
| 549 | sizeof(struct _index_kobject ) * num_cache_leaves, GFP_KERNEL); |
| 550 | if (unlikely(index_kobject[cpu] == NULL)) |
| 551 | goto err_out; |
| 552 | memset(index_kobject[cpu], 0, |
| 553 | sizeof(struct _index_kobject) * num_cache_leaves); |
| 554 | |
| 555 | return 0; |
| 556 | |
| 557 | err_out: |
| 558 | cpuid4_cache_sysfs_exit(cpu); |
| 559 | return -ENOMEM; |
| 560 | } |
| 561 | |
| 562 | /* Add/Remove cache interface for CPU device */ |
Ashok Raj | 1aa1a9f | 2005-10-30 14:59:50 -0800 | [diff] [blame] | 563 | static int __cpuinit cache_add_dev(struct sys_device * sys_dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 564 | { |
| 565 | unsigned int cpu = sys_dev->id; |
| 566 | unsigned long i, j; |
| 567 | struct _index_kobject *this_object; |
| 568 | int retval = 0; |
| 569 | |
| 570 | retval = cpuid4_cache_sysfs_init(cpu); |
| 571 | if (unlikely(retval < 0)) |
| 572 | return retval; |
| 573 | |
| 574 | cache_kobject[cpu]->parent = &sys_dev->kobj; |
| 575 | kobject_set_name(cache_kobject[cpu], "%s", "cache"); |
| 576 | cache_kobject[cpu]->ktype = &ktype_percpu_entry; |
| 577 | retval = kobject_register(cache_kobject[cpu]); |
| 578 | |
| 579 | for (i = 0; i < num_cache_leaves; i++) { |
| 580 | this_object = INDEX_KOBJECT_PTR(cpu,i); |
| 581 | this_object->cpu = cpu; |
| 582 | this_object->index = i; |
| 583 | this_object->kobj.parent = cache_kobject[cpu]; |
| 584 | kobject_set_name(&(this_object->kobj), "index%1lu", i); |
| 585 | this_object->kobj.ktype = &ktype_cache; |
| 586 | retval = kobject_register(&(this_object->kobj)); |
| 587 | if (unlikely(retval)) { |
| 588 | for (j = 0; j < i; j++) { |
| 589 | kobject_unregister( |
| 590 | &(INDEX_KOBJECT_PTR(cpu,j)->kobj)); |
| 591 | } |
| 592 | kobject_unregister(cache_kobject[cpu]); |
| 593 | cpuid4_cache_sysfs_exit(cpu); |
| 594 | break; |
| 595 | } |
| 596 | } |
| 597 | return retval; |
| 598 | } |
| 599 | |
Ashok Raj | 1aa1a9f | 2005-10-30 14:59:50 -0800 | [diff] [blame] | 600 | static void __cpuexit cache_remove_dev(struct sys_device * sys_dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 601 | { |
| 602 | unsigned int cpu = sys_dev->id; |
| 603 | unsigned long i; |
| 604 | |
Siddha, Suresh B | 2b09187 | 2005-11-05 17:25:54 +0100 | [diff] [blame] | 605 | for (i = 0; i < num_cache_leaves; i++) { |
| 606 | cache_remove_shared_cpu_map(cpu, i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 607 | kobject_unregister(&(INDEX_KOBJECT_PTR(cpu,i)->kobj)); |
Siddha, Suresh B | 2b09187 | 2005-11-05 17:25:54 +0100 | [diff] [blame] | 608 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 609 | kobject_unregister(cache_kobject[cpu]); |
| 610 | cpuid4_cache_sysfs_exit(cpu); |
Ashok Raj | 1aa1a9f | 2005-10-30 14:59:50 -0800 | [diff] [blame] | 611 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 612 | } |
| 613 | |
Ashok Raj | 1aa1a9f | 2005-10-30 14:59:50 -0800 | [diff] [blame] | 614 | static int __cpuinit cacheinfo_cpu_callback(struct notifier_block *nfb, |
| 615 | unsigned long action, void *hcpu) |
| 616 | { |
| 617 | unsigned int cpu = (unsigned long)hcpu; |
| 618 | struct sys_device *sys_dev; |
| 619 | |
| 620 | sys_dev = get_cpu_sysdev(cpu); |
| 621 | switch (action) { |
| 622 | case CPU_ONLINE: |
| 623 | cache_add_dev(sys_dev); |
| 624 | break; |
| 625 | case CPU_DEAD: |
| 626 | cache_remove_dev(sys_dev); |
| 627 | break; |
| 628 | } |
| 629 | return NOTIFY_OK; |
| 630 | } |
| 631 | |
| 632 | static struct notifier_block cacheinfo_cpu_notifier = |
| 633 | { |
| 634 | .notifier_call = cacheinfo_cpu_callback, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 635 | }; |
| 636 | |
Ashok Raj | 1aa1a9f | 2005-10-30 14:59:50 -0800 | [diff] [blame] | 637 | static int __cpuinit cache_sysfs_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 638 | { |
Ashok Raj | 1aa1a9f | 2005-10-30 14:59:50 -0800 | [diff] [blame] | 639 | int i; |
| 640 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 641 | if (num_cache_leaves == 0) |
| 642 | return 0; |
| 643 | |
Ashok Raj | 1aa1a9f | 2005-10-30 14:59:50 -0800 | [diff] [blame] | 644 | register_cpu_notifier(&cacheinfo_cpu_notifier); |
| 645 | |
| 646 | for_each_online_cpu(i) { |
| 647 | cacheinfo_cpu_callback(&cacheinfo_cpu_notifier, CPU_ONLINE, |
| 648 | (void *)(long)i); |
| 649 | } |
| 650 | |
| 651 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 652 | } |
| 653 | |
Ashok Raj | 1aa1a9f | 2005-10-30 14:59:50 -0800 | [diff] [blame] | 654 | device_initcall(cache_sysfs_init); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 655 | |
| 656 | #endif |