Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
3f79410c | 2 | * Routines to identify caches on Intel CPU. |
1da177e4 | 3 | * |
cdcf772e IM |
4 | * Changes: |
5 | * Venkatesh Pallipadi : Adding cache identification through cpuid(4) | |
8bdbd962 | 6 | * Ashok Raj <ashok.raj@intel.com>: Work with CPU hotplug infrastructure. |
67cddd94 | 7 | * Andi Kleen / Andreas Herrmann : CPUID4 emulation on AMD. |
1da177e4 LT |
8 | */ |
9 | ||
1da177e4 | 10 | #include <linux/slab.h> |
0d55ba46 | 11 | #include <linux/cacheinfo.h> |
1da177e4 | 12 | #include <linux/cpu.h> |
4e57b681 | 13 | #include <linux/sched.h> |
5b825c3a | 14 | #include <linux/capability.h> |
0d55ba46 | 15 | #include <linux/sysfs.h> |
a24e8d36 | 16 | #include <linux/pci.h> |
1da177e4 | 17 | |
cd4d09ec | 18 | #include <asm/cpufeature.h> |
23ac4ae8 | 19 | #include <asm/amd_nb.h> |
dcf39daf | 20 | #include <asm/smp.h> |
1da177e4 LT |
21 | |
22 | #define LVL_1_INST 1 | |
23 | #define LVL_1_DATA 2 | |
24 | #define LVL_2 3 | |
25 | #define LVL_3 4 | |
26 | #define LVL_TRACE 5 | |
27 | ||
8bdbd962 | 28 | struct _cache_table { |
1da177e4 LT |
29 | unsigned char descriptor; |
30 | char cache_type; | |
31 | short size; | |
32 | }; | |
33 | ||
2ca49b2f DJ |
34 | #define MB(x) ((x) * 1024) |
35 | ||
8bdbd962 AC |
36 | /* All the cache descriptor types we care about (no TLB or |
37 | trace cache entries) */ | |
38 | ||
148f9bb8 | 39 | static const struct _cache_table cache_table[] = |
1da177e4 LT |
40 | { |
41 | { 0x06, LVL_1_INST, 8 }, /* 4-way set assoc, 32 byte line size */ | |
42 | { 0x08, LVL_1_INST, 16 }, /* 4-way set assoc, 32 byte line size */ | |
9a8ecae8 | 43 | { 0x09, LVL_1_INST, 32 }, /* 4-way set assoc, 64 byte line size */ |
1da177e4 LT |
44 | { 0x0a, LVL_1_DATA, 8 }, /* 2 way set assoc, 32 byte line size */ |
45 | { 0x0c, LVL_1_DATA, 16 }, /* 4-way set assoc, 32 byte line size */ | |
9a8ecae8 | 46 | { 0x0d, LVL_1_DATA, 16 }, /* 4-way set assoc, 64 byte line size */ |
fb87ec38 | 47 | { 0x0e, LVL_1_DATA, 24 }, /* 6-way set assoc, 64 byte line size */ |
9a8ecae8 | 48 | { 0x21, LVL_2, 256 }, /* 8-way set assoc, 64 byte line size */ |
1da177e4 | 49 | { 0x22, LVL_3, 512 }, /* 4-way set assoc, sectored cache, 64 byte line size */ |
2ca49b2f DJ |
50 | { 0x23, LVL_3, MB(1) }, /* 8-way set assoc, sectored cache, 64 byte line size */ |
51 | { 0x25, LVL_3, MB(2) }, /* 8-way set assoc, sectored cache, 64 byte line size */ | |
52 | { 0x29, LVL_3, MB(4) }, /* 8-way set assoc, sectored cache, 64 byte line size */ | |
1da177e4 LT |
53 | { 0x2c, LVL_1_DATA, 32 }, /* 8-way set assoc, 64 byte line size */ |
54 | { 0x30, LVL_1_INST, 32 }, /* 8-way set assoc, 64 byte line size */ | |
55 | { 0x39, LVL_2, 128 }, /* 4-way set assoc, sectored cache, 64 byte line size */ | |
6fe8f479 | 56 | { 0x3a, LVL_2, 192 }, /* 6-way set assoc, sectored cache, 64 byte line size */ |
1da177e4 LT |
57 | { 0x3b, LVL_2, 128 }, /* 2-way set assoc, sectored cache, 64 byte line size */ |
58 | { 0x3c, LVL_2, 256 }, /* 4-way set assoc, sectored cache, 64 byte line size */ | |
6fe8f479 DJ |
59 | { 0x3d, LVL_2, 384 }, /* 6-way set assoc, sectored cache, 64 byte line size */ |
60 | { 0x3e, LVL_2, 512 }, /* 4-way set assoc, sectored cache, 64 byte line size */ | |
04fa11ea | 61 | { 0x3f, LVL_2, 256 }, /* 2-way set assoc, 64 byte line size */ |
1da177e4 LT |
62 | { 0x41, LVL_2, 128 }, /* 4-way set assoc, 32 byte line size */ |
63 | { 0x42, LVL_2, 256 }, /* 4-way set assoc, 32 byte line size */ | |
64 | { 0x43, LVL_2, 512 }, /* 4-way set assoc, 32 byte line size */ | |
2ca49b2f DJ |
65 | { 0x44, LVL_2, MB(1) }, /* 4-way set assoc, 32 byte line size */ |
66 | { 0x45, LVL_2, MB(2) }, /* 4-way set assoc, 32 byte line size */ | |
67 | { 0x46, LVL_3, MB(4) }, /* 4-way set assoc, 64 byte line size */ | |
68 | { 0x47, LVL_3, MB(8) }, /* 8-way set assoc, 64 byte line size */ | |
fb87ec38 | 69 | { 0x48, LVL_2, MB(3) }, /* 12-way set assoc, 64 byte line size */ |
2ca49b2f DJ |
70 | { 0x49, LVL_3, MB(4) }, /* 16-way set assoc, 64 byte line size */ |
71 | { 0x4a, LVL_3, MB(6) }, /* 12-way set assoc, 64 byte line size */ | |
72 | { 0x4b, LVL_3, MB(8) }, /* 16-way set assoc, 64 byte line size */ | |
73 | { 0x4c, LVL_3, MB(12) }, /* 12-way set assoc, 64 byte line size */ | |
74 | { 0x4d, LVL_3, MB(16) }, /* 16-way set assoc, 64 byte line size */ | |
75 | { 0x4e, LVL_2, MB(6) }, /* 24-way set assoc, 64 byte line size */ | |
1da177e4 LT |
76 | { 0x60, LVL_1_DATA, 16 }, /* 8-way set assoc, sectored cache, 64 byte line size */ |
77 | { 0x66, LVL_1_DATA, 8 }, /* 4-way set assoc, sectored cache, 64 byte line size */ | |
78 | { 0x67, LVL_1_DATA, 16 }, /* 4-way set assoc, sectored cache, 64 byte line size */ | |
79 | { 0x68, LVL_1_DATA, 32 }, /* 4-way set assoc, sectored cache, 64 byte line size */ | |
80 | { 0x70, LVL_TRACE, 12 }, /* 8-way set assoc */ | |
81 | { 0x71, LVL_TRACE, 16 }, /* 8-way set assoc */ | |
82 | { 0x72, LVL_TRACE, 32 }, /* 8-way set assoc */ | |
6fe8f479 | 83 | { 0x73, LVL_TRACE, 64 }, /* 8-way set assoc */ |
2ca49b2f DJ |
84 | { 0x78, LVL_2, MB(1) }, /* 4-way set assoc, 64 byte line size */ |
85 | { 0x79, LVL_2, 128 }, /* 8-way set assoc, sectored cache, 64 byte line size */ | |
86 | { 0x7a, LVL_2, 256 }, /* 8-way set assoc, sectored cache, 64 byte line size */ | |
87 | { 0x7b, LVL_2, 512 }, /* 8-way set assoc, sectored cache, 64 byte line size */ | |
88 | { 0x7c, LVL_2, MB(1) }, /* 8-way set assoc, sectored cache, 64 byte line size */ | |
89 | { 0x7d, LVL_2, MB(2) }, /* 8-way set assoc, 64 byte line size */ | |
90 | { 0x7f, LVL_2, 512 }, /* 2-way set assoc, 64 byte line size */ | |
fb87ec38 | 91 | { 0x80, LVL_2, 512 }, /* 8-way set assoc, 64 byte line size */ |
2ca49b2f DJ |
92 | { 0x82, LVL_2, 256 }, /* 8-way set assoc, 32 byte line size */ |
93 | { 0x83, LVL_2, 512 }, /* 8-way set assoc, 32 byte line size */ | |
94 | { 0x84, LVL_2, MB(1) }, /* 8-way set assoc, 32 byte line size */ | |
95 | { 0x85, LVL_2, MB(2) }, /* 8-way set assoc, 32 byte line size */ | |
96 | { 0x86, LVL_2, 512 }, /* 4-way set assoc, 64 byte line size */ | |
97 | { 0x87, LVL_2, MB(1) }, /* 8-way set assoc, 64 byte line size */ | |
98 | { 0xd0, LVL_3, 512 }, /* 4-way set assoc, 64 byte line size */ | |
99 | { 0xd1, LVL_3, MB(1) }, /* 4-way set assoc, 64 byte line size */ | |
100 | { 0xd2, LVL_3, MB(2) }, /* 4-way set assoc, 64 byte line size */ | |
101 | { 0xd6, LVL_3, MB(1) }, /* 8-way set assoc, 64 byte line size */ | |
102 | { 0xd7, LVL_3, MB(2) }, /* 8-way set assoc, 64 byte line size */ | |
103 | { 0xd8, LVL_3, MB(4) }, /* 12-way set assoc, 64 byte line size */ | |
104 | { 0xdc, LVL_3, MB(2) }, /* 12-way set assoc, 64 byte line size */ | |
105 | { 0xdd, LVL_3, MB(4) }, /* 12-way set assoc, 64 byte line size */ | |
106 | { 0xde, LVL_3, MB(8) }, /* 12-way set assoc, 64 byte line size */ | |
107 | { 0xe2, LVL_3, MB(2) }, /* 16-way set assoc, 64 byte line size */ | |
108 | { 0xe3, LVL_3, MB(4) }, /* 16-way set assoc, 64 byte line size */ | |
109 | { 0xe4, LVL_3, MB(8) }, /* 16-way set assoc, 64 byte line size */ | |
110 | { 0xea, LVL_3, MB(12) }, /* 24-way set assoc, 64 byte line size */ | |
111 | { 0xeb, LVL_3, MB(18) }, /* 24-way set assoc, 64 byte line size */ | |
112 | { 0xec, LVL_3, MB(24) }, /* 24-way set assoc, 64 byte line size */ | |
1da177e4 LT |
113 | { 0x00, 0, 0} |
114 | }; | |
115 | ||
116 | ||
8bdbd962 | 117 | enum _cache_type { |
0d55ba46 SH |
118 | CTYPE_NULL = 0, |
119 | CTYPE_DATA = 1, | |
120 | CTYPE_INST = 2, | |
121 | CTYPE_UNIFIED = 3 | |
1da177e4 LT |
122 | }; |
123 | ||
124 | union _cpuid4_leaf_eax { | |
125 | struct { | |
126 | enum _cache_type type:5; | |
127 | unsigned int level:3; | |
128 | unsigned int is_self_initializing:1; | |
129 | unsigned int is_fully_associative:1; | |
130 | unsigned int reserved:4; | |
131 | unsigned int num_threads_sharing:12; | |
132 | unsigned int num_cores_on_die:6; | |
133 | } split; | |
134 | u32 full; | |
135 | }; | |
136 | ||
137 | union _cpuid4_leaf_ebx { | |
138 | struct { | |
139 | unsigned int coherency_line_size:12; | |
140 | unsigned int physical_line_partition:10; | |
141 | unsigned int ways_of_associativity:10; | |
142 | } split; | |
143 | u32 full; | |
144 | }; | |
145 | ||
146 | union _cpuid4_leaf_ecx { | |
147 | struct { | |
148 | unsigned int number_of_sets:32; | |
149 | } split; | |
150 | u32 full; | |
151 | }; | |
152 | ||
b7d11a76 | 153 | struct _cpuid4_info_regs { |
1da177e4 LT |
154 | union _cpuid4_leaf_eax eax; |
155 | union _cpuid4_leaf_ebx ebx; | |
156 | union _cpuid4_leaf_ecx ecx; | |
d57e3ab7 | 157 | unsigned int id; |
1da177e4 | 158 | unsigned long size; |
d2946041 | 159 | struct amd_northbridge *nb; |
f9b90566 MT |
160 | }; |
161 | ||
18ab2cd3 | 162 | static unsigned short num_cache_leaves; |
240cd6a8 AK |
163 | |
164 | /* AMD doesn't have CPUID4. Emulate it here to report the same | |
165 | information to the user. This makes some assumptions about the machine: | |
67cddd94 | 166 | L2 not shared, no SMT etc. that is currently true on AMD CPUs. |
240cd6a8 AK |
167 | |
168 | In theory the TLBs could be reported as fake type (they are in "dummy"). | |
169 | Maybe later */ | |
170 | union l1_cache { | |
171 | struct { | |
8bdbd962 AC |
172 | unsigned line_size:8; |
173 | unsigned lines_per_tag:8; | |
174 | unsigned assoc:8; | |
175 | unsigned size_in_kb:8; | |
240cd6a8 AK |
176 | }; |
177 | unsigned val; | |
178 | }; | |
179 | ||
180 | union l2_cache { | |
181 | struct { | |
8bdbd962 AC |
182 | unsigned line_size:8; |
183 | unsigned lines_per_tag:4; | |
184 | unsigned assoc:4; | |
185 | unsigned size_in_kb:16; | |
240cd6a8 AK |
186 | }; |
187 | unsigned val; | |
188 | }; | |
189 | ||
67cddd94 AK |
190 | union l3_cache { |
191 | struct { | |
8bdbd962 AC |
192 | unsigned line_size:8; |
193 | unsigned lines_per_tag:4; | |
194 | unsigned assoc:4; | |
195 | unsigned res:2; | |
196 | unsigned size_encoded:14; | |
67cddd94 AK |
197 | }; |
198 | unsigned val; | |
199 | }; | |
200 | ||
148f9bb8 | 201 | static const unsigned short assocs[] = { |
6265ff19 AH |
202 | [1] = 1, |
203 | [2] = 2, | |
204 | [4] = 4, | |
205 | [6] = 8, | |
206 | [8] = 16, | |
207 | [0xa] = 32, | |
208 | [0xb] = 48, | |
67cddd94 | 209 | [0xc] = 64, |
6265ff19 AH |
210 | [0xd] = 96, |
211 | [0xe] = 128, | |
212 | [0xf] = 0xffff /* fully associative - no way to show this currently */ | |
67cddd94 AK |
213 | }; |
214 | ||
148f9bb8 PG |
215 | static const unsigned char levels[] = { 1, 1, 2, 3 }; |
216 | static const unsigned char types[] = { 1, 2, 3, 3 }; | |
240cd6a8 | 217 | |
0d55ba46 SH |
218 | static const enum cache_type cache_type_map[] = { |
219 | [CTYPE_NULL] = CACHE_TYPE_NOCACHE, | |
220 | [CTYPE_DATA] = CACHE_TYPE_DATA, | |
221 | [CTYPE_INST] = CACHE_TYPE_INST, | |
222 | [CTYPE_UNIFIED] = CACHE_TYPE_UNIFIED, | |
223 | }; | |
224 | ||
148f9bb8 | 225 | static void |
cdcf772e IM |
226 | amd_cpuid4(int leaf, union _cpuid4_leaf_eax *eax, |
227 | union _cpuid4_leaf_ebx *ebx, | |
228 | union _cpuid4_leaf_ecx *ecx) | |
240cd6a8 AK |
229 | { |
230 | unsigned dummy; | |
231 | unsigned line_size, lines_per_tag, assoc, size_in_kb; | |
232 | union l1_cache l1i, l1d; | |
233 | union l2_cache l2; | |
67cddd94 AK |
234 | union l3_cache l3; |
235 | union l1_cache *l1 = &l1d; | |
240cd6a8 AK |
236 | |
237 | eax->full = 0; | |
238 | ebx->full = 0; | |
239 | ecx->full = 0; | |
240 | ||
241 | cpuid(0x80000005, &dummy, &dummy, &l1d.val, &l1i.val); | |
67cddd94 | 242 | cpuid(0x80000006, &dummy, &dummy, &l2.val, &l3.val); |
240cd6a8 | 243 | |
67cddd94 AK |
244 | switch (leaf) { |
245 | case 1: | |
246 | l1 = &l1i; | |
247 | case 0: | |
248 | if (!l1->val) | |
249 | return; | |
a326e948 | 250 | assoc = assocs[l1->assoc]; |
240cd6a8 AK |
251 | line_size = l1->line_size; |
252 | lines_per_tag = l1->lines_per_tag; | |
253 | size_in_kb = l1->size_in_kb; | |
67cddd94 AK |
254 | break; |
255 | case 2: | |
256 | if (!l2.val) | |
257 | return; | |
a326e948 | 258 | assoc = assocs[l2.assoc]; |
240cd6a8 AK |
259 | line_size = l2.line_size; |
260 | lines_per_tag = l2.lines_per_tag; | |
261 | /* cpu_data has errata corrections for K7 applied */ | |
7b543a53 | 262 | size_in_kb = __this_cpu_read(cpu_info.x86_cache_size); |
67cddd94 AK |
263 | break; |
264 | case 3: | |
265 | if (!l3.val) | |
266 | return; | |
a326e948 | 267 | assoc = assocs[l3.assoc]; |
67cddd94 AK |
268 | line_size = l3.line_size; |
269 | lines_per_tag = l3.lines_per_tag; | |
270 | size_in_kb = l3.size_encoded * 512; | |
a326e948 AH |
271 | if (boot_cpu_has(X86_FEATURE_AMD_DCM)) { |
272 | size_in_kb = size_in_kb >> 1; | |
273 | assoc = assoc >> 1; | |
274 | } | |
67cddd94 AK |
275 | break; |
276 | default: | |
277 | return; | |
240cd6a8 AK |
278 | } |
279 | ||
67cddd94 AK |
280 | eax->split.is_self_initializing = 1; |
281 | eax->split.type = types[leaf]; | |
282 | eax->split.level = levels[leaf]; | |
a326e948 | 283 | eax->split.num_threads_sharing = 0; |
7b543a53 | 284 | eax->split.num_cores_on_die = __this_cpu_read(cpu_info.x86_max_cores) - 1; |
67cddd94 AK |
285 | |
286 | ||
a326e948 | 287 | if (assoc == 0xffff) |
240cd6a8 AK |
288 | eax->split.is_fully_associative = 1; |
289 | ebx->split.coherency_line_size = line_size - 1; | |
a326e948 | 290 | ebx->split.ways_of_associativity = assoc - 1; |
240cd6a8 AK |
291 | ebx->split.physical_line_partition = lines_per_tag - 1; |
292 | ecx->split.number_of_sets = (size_in_kb * 1024) / line_size / | |
293 | (ebx->split.ways_of_associativity + 1) - 1; | |
294 | } | |
1da177e4 | 295 | |
f76e39c5 | 296 | #if defined(CONFIG_AMD_NB) && defined(CONFIG_SYSFS) |
0d55ba46 | 297 | |
ba06edb6 BP |
298 | /* |
299 | * L3 cache descriptors | |
300 | */ | |
148f9bb8 | 301 | static void amd_calc_l3_indices(struct amd_northbridge *nb) |
048a8774 | 302 | { |
d2946041 | 303 | struct amd_l3_cache *l3 = &nb->l3_cache; |
048a8774 | 304 | unsigned int sc0, sc1, sc2, sc3; |
cb19060a | 305 | u32 val = 0; |
048a8774 | 306 | |
d2946041 | 307 | pci_read_config_dword(nb->misc, 0x1C4, &val); |
048a8774 BP |
308 | |
309 | /* calculate subcache sizes */ | |
9350f982 BP |
310 | l3->subcaches[0] = sc0 = !(val & BIT(0)); |
311 | l3->subcaches[1] = sc1 = !(val & BIT(4)); | |
77e75fc7 FA |
312 | |
313 | if (boot_cpu_data.x86 == 0x15) { | |
314 | l3->subcaches[0] = sc0 += !(val & BIT(1)); | |
315 | l3->subcaches[1] = sc1 += !(val & BIT(5)); | |
316 | } | |
317 | ||
9350f982 BP |
318 | l3->subcaches[2] = sc2 = !(val & BIT(8)) + !(val & BIT(9)); |
319 | l3->subcaches[3] = sc3 = !(val & BIT(12)) + !(val & BIT(13)); | |
320 | ||
732eacc0 | 321 | l3->indices = (max(max3(sc0, sc1, sc2), sc3) << 10) - 1; |
ba06edb6 BP |
322 | } |
323 | ||
8cc1176e BP |
324 | /* |
325 | * check whether a slot used for disabling an L3 index is occupied. | |
326 | * @l3: L3 cache descriptor | |
327 | * @slot: slot number (0..1) | |
328 | * | |
329 | * @returns: the disabled index if used or negative value if slot free. | |
330 | */ | |
18ab2cd3 | 331 | static int amd_get_l3_disable_slot(struct amd_northbridge *nb, unsigned slot) |
8cc1176e BP |
332 | { |
333 | unsigned int reg = 0; | |
334 | ||
d2946041 | 335 | pci_read_config_dword(nb->misc, 0x1BC + slot * 4, ®); |
8cc1176e BP |
336 | |
337 | /* check whether this slot is activated already */ | |
338 | if (reg & (3UL << 30)) | |
339 | return reg & 0xfff; | |
340 | ||
341 | return -1; | |
342 | } | |
343 | ||
0d55ba46 | 344 | static ssize_t show_cache_disable(struct cacheinfo *this_leaf, char *buf, |
59d3b388 | 345 | unsigned int slot) |
cb19060a | 346 | { |
8cc1176e | 347 | int index; |
0d55ba46 | 348 | struct amd_northbridge *nb = this_leaf->priv; |
cb19060a | 349 | |
0d55ba46 | 350 | index = amd_get_l3_disable_slot(nb, slot); |
8cc1176e BP |
351 | if (index >= 0) |
352 | return sprintf(buf, "%d\n", index); | |
cb19060a | 353 | |
8cc1176e | 354 | return sprintf(buf, "FREE\n"); |
cb19060a BP |
355 | } |
356 | ||
59d3b388 | 357 | #define SHOW_CACHE_DISABLE(slot) \ |
cb19060a | 358 | static ssize_t \ |
0d55ba46 SH |
359 | cache_disable_##slot##_show(struct device *dev, \ |
360 | struct device_attribute *attr, char *buf) \ | |
cb19060a | 361 | { \ |
0d55ba46 | 362 | struct cacheinfo *this_leaf = dev_get_drvdata(dev); \ |
59d3b388 | 363 | return show_cache_disable(this_leaf, buf, slot); \ |
cb19060a BP |
364 | } |
365 | SHOW_CACHE_DISABLE(0) | |
366 | SHOW_CACHE_DISABLE(1) | |
367 | ||
d2946041 | 368 | static void amd_l3_disable_index(struct amd_northbridge *nb, int cpu, |
59d3b388 BP |
369 | unsigned slot, unsigned long idx) |
370 | { | |
371 | int i; | |
372 | ||
373 | idx |= BIT(30); | |
374 | ||
375 | /* | |
376 | * disable index in all 4 subcaches | |
377 | */ | |
378 | for (i = 0; i < 4; i++) { | |
379 | u32 reg = idx | (i << 20); | |
380 | ||
d2946041 | 381 | if (!nb->l3_cache.subcaches[i]) |
59d3b388 BP |
382 | continue; |
383 | ||
d2946041 | 384 | pci_write_config_dword(nb->misc, 0x1BC + slot * 4, reg); |
59d3b388 BP |
385 | |
386 | /* | |
387 | * We need to WBINVD on a core on the node containing the L3 | |
388 | * cache which indices we disable therefore a simple wbinvd() | |
389 | * is not sufficient. | |
390 | */ | |
391 | wbinvd_on_cpu(cpu); | |
392 | ||
393 | reg |= BIT(31); | |
d2946041 | 394 | pci_write_config_dword(nb->misc, 0x1BC + slot * 4, reg); |
59d3b388 BP |
395 | } |
396 | } | |
397 | ||
8cc1176e BP |
398 | /* |
399 | * disable a L3 cache index by using a disable-slot | |
400 | * | |
401 | * @l3: L3 cache descriptor | |
402 | * @cpu: A CPU on the node containing the L3 cache | |
403 | * @slot: slot number (0..1) | |
404 | * @index: index to disable | |
405 | * | |
406 | * @return: 0 on success, error status on failure | |
407 | */ | |
18ab2cd3 GT |
408 | static int amd_set_l3_disable_slot(struct amd_northbridge *nb, int cpu, |
409 | unsigned slot, unsigned long index) | |
cb19060a | 410 | { |
8cc1176e | 411 | int ret = 0; |
cb19060a | 412 | |
42be4505 | 413 | /* check if @slot is already used or the index is already disabled */ |
d2946041 | 414 | ret = amd_get_l3_disable_slot(nb, slot); |
8cc1176e | 415 | if (ret >= 0) |
a720b2dd | 416 | return -EEXIST; |
cb19060a | 417 | |
d2946041 | 418 | if (index > nb->l3_cache.indices) |
8cc1176e BP |
419 | return -EINVAL; |
420 | ||
42be4505 | 421 | /* check whether the other slot has disabled the same index already */ |
d2946041 | 422 | if (index == amd_get_l3_disable_slot(nb, !slot)) |
a720b2dd | 423 | return -EEXIST; |
8cc1176e | 424 | |
d2946041 | 425 | amd_l3_disable_index(nb, cpu, slot, index); |
8cc1176e BP |
426 | |
427 | return 0; | |
428 | } | |
429 | ||
0d55ba46 SH |
430 | static ssize_t store_cache_disable(struct cacheinfo *this_leaf, |
431 | const char *buf, size_t count, | |
432 | unsigned int slot) | |
8cc1176e BP |
433 | { |
434 | unsigned long val = 0; | |
435 | int cpu, err = 0; | |
0d55ba46 | 436 | struct amd_northbridge *nb = this_leaf->priv; |
8cc1176e | 437 | |
cb19060a BP |
438 | if (!capable(CAP_SYS_ADMIN)) |
439 | return -EPERM; | |
440 | ||
0d55ba46 | 441 | cpu = cpumask_first(&this_leaf->shared_cpu_map); |
cb19060a | 442 | |
164109e3 | 443 | if (kstrtoul(buf, 10, &val) < 0) |
cb19060a BP |
444 | return -EINVAL; |
445 | ||
0d55ba46 | 446 | err = amd_set_l3_disable_slot(nb, cpu, slot, val); |
8cc1176e BP |
447 | if (err) { |
448 | if (err == -EEXIST) | |
1b74dde7 | 449 | pr_warn("L3 slot %d in use/index already disabled!\n", |
a720b2dd | 450 | slot); |
8cc1176e BP |
451 | return err; |
452 | } | |
cb19060a BP |
453 | return count; |
454 | } | |
455 | ||
59d3b388 | 456 | #define STORE_CACHE_DISABLE(slot) \ |
cb19060a | 457 | static ssize_t \ |
0d55ba46 SH |
458 | cache_disable_##slot##_store(struct device *dev, \ |
459 | struct device_attribute *attr, \ | |
460 | const char *buf, size_t count) \ | |
cb19060a | 461 | { \ |
0d55ba46 | 462 | struct cacheinfo *this_leaf = dev_get_drvdata(dev); \ |
59d3b388 | 463 | return store_cache_disable(this_leaf, buf, count, slot); \ |
8cb22bcb | 464 | } |
cb19060a BP |
465 | STORE_CACHE_DISABLE(0) |
466 | STORE_CACHE_DISABLE(1) | |
467 | ||
0d55ba46 SH |
468 | static ssize_t subcaches_show(struct device *dev, |
469 | struct device_attribute *attr, char *buf) | |
cabb5bd7 | 470 | { |
0d55ba46 SH |
471 | struct cacheinfo *this_leaf = dev_get_drvdata(dev); |
472 | int cpu = cpumask_first(&this_leaf->shared_cpu_map); | |
cabb5bd7 HR |
473 | |
474 | return sprintf(buf, "%x\n", amd_get_subcaches(cpu)); | |
475 | } | |
476 | ||
0d55ba46 SH |
477 | static ssize_t subcaches_store(struct device *dev, |
478 | struct device_attribute *attr, | |
479 | const char *buf, size_t count) | |
cabb5bd7 | 480 | { |
0d55ba46 SH |
481 | struct cacheinfo *this_leaf = dev_get_drvdata(dev); |
482 | int cpu = cpumask_first(&this_leaf->shared_cpu_map); | |
cabb5bd7 HR |
483 | unsigned long val; |
484 | ||
485 | if (!capable(CAP_SYS_ADMIN)) | |
486 | return -EPERM; | |
487 | ||
164109e3 | 488 | if (kstrtoul(buf, 16, &val) < 0) |
cabb5bd7 HR |
489 | return -EINVAL; |
490 | ||
491 | if (amd_set_subcaches(cpu, val)) | |
492 | return -EINVAL; | |
493 | ||
494 | return count; | |
495 | } | |
496 | ||
0d55ba46 SH |
497 | static DEVICE_ATTR_RW(cache_disable_0); |
498 | static DEVICE_ATTR_RW(cache_disable_1); | |
499 | static DEVICE_ATTR_RW(subcaches); | |
500 | ||
501 | static umode_t | |
502 | cache_private_attrs_is_visible(struct kobject *kobj, | |
503 | struct attribute *attr, int unused) | |
504 | { | |
505 | struct device *dev = kobj_to_dev(kobj); | |
506 | struct cacheinfo *this_leaf = dev_get_drvdata(dev); | |
507 | umode_t mode = attr->mode; | |
508 | ||
509 | if (!this_leaf->priv) | |
510 | return 0; | |
511 | ||
512 | if ((attr == &dev_attr_subcaches.attr) && | |
513 | amd_nb_has_feature(AMD_NB_L3_PARTITIONING)) | |
514 | return mode; | |
515 | ||
516 | if ((attr == &dev_attr_cache_disable_0.attr || | |
517 | attr == &dev_attr_cache_disable_1.attr) && | |
518 | amd_nb_has_feature(AMD_NB_L3_INDEX_DISABLE)) | |
519 | return mode; | |
520 | ||
521 | return 0; | |
522 | } | |
523 | ||
524 | static struct attribute_group cache_private_group = { | |
525 | .is_visible = cache_private_attrs_is_visible, | |
526 | }; | |
527 | ||
528 | static void init_amd_l3_attrs(void) | |
529 | { | |
530 | int n = 1; | |
531 | static struct attribute **amd_l3_attrs; | |
532 | ||
533 | if (amd_l3_attrs) /* already initialized */ | |
534 | return; | |
535 | ||
536 | if (amd_nb_has_feature(AMD_NB_L3_INDEX_DISABLE)) | |
537 | n += 2; | |
538 | if (amd_nb_has_feature(AMD_NB_L3_PARTITIONING)) | |
539 | n += 1; | |
540 | ||
541 | amd_l3_attrs = kcalloc(n, sizeof(*amd_l3_attrs), GFP_KERNEL); | |
542 | if (!amd_l3_attrs) | |
543 | return; | |
544 | ||
545 | n = 0; | |
546 | if (amd_nb_has_feature(AMD_NB_L3_INDEX_DISABLE)) { | |
547 | amd_l3_attrs[n++] = &dev_attr_cache_disable_0.attr; | |
548 | amd_l3_attrs[n++] = &dev_attr_cache_disable_1.attr; | |
549 | } | |
550 | if (amd_nb_has_feature(AMD_NB_L3_PARTITIONING)) | |
551 | amd_l3_attrs[n++] = &dev_attr_subcaches.attr; | |
cabb5bd7 | 552 | |
0d55ba46 SH |
553 | cache_private_group.attrs = amd_l3_attrs; |
554 | } | |
555 | ||
556 | const struct attribute_group * | |
557 | cache_get_priv_group(struct cacheinfo *this_leaf) | |
558 | { | |
559 | struct amd_northbridge *nb = this_leaf->priv; | |
560 | ||
37dea8c5 | 561 | if (this_leaf->level < 3 || !nb) |
0d55ba46 SH |
562 | return NULL; |
563 | ||
564 | if (nb && nb->l3_cache.indices) | |
565 | init_amd_l3_attrs(); | |
566 | ||
567 | return &cache_private_group; | |
568 | } | |
569 | ||
570 | static void amd_init_l3_cache(struct _cpuid4_info_regs *this_leaf, int index) | |
571 | { | |
572 | int node; | |
573 | ||
574 | /* only for L3, and not in virtualized environments */ | |
575 | if (index < 3) | |
576 | return; | |
577 | ||
578 | node = amd_get_nb_id(smp_processor_id()); | |
579 | this_leaf->nb = node_to_amd_nb(node); | |
580 | if (this_leaf->nb && !this_leaf->nb->l3_cache.indices) | |
581 | amd_calc_l3_indices(this_leaf->nb); | |
582 | } | |
f76e39c5 | 583 | #else |
f658bcfb | 584 | #define amd_init_l3_cache(x, y) |
f76e39c5 | 585 | #endif /* CONFIG_AMD_NB && CONFIG_SYSFS */ |
8cb22bcb | 586 | |
7a4983bb | 587 | static int |
148f9bb8 | 588 | cpuid4_cache_lookup_regs(int index, struct _cpuid4_info_regs *this_leaf) |
1da177e4 | 589 | { |
cabb5bd7 HR |
590 | union _cpuid4_leaf_eax eax; |
591 | union _cpuid4_leaf_ebx ebx; | |
592 | union _cpuid4_leaf_ecx ecx; | |
240cd6a8 | 593 | unsigned edx; |
1da177e4 | 594 | |
8cb22bcb | 595 | if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD) { |
362f924b | 596 | if (boot_cpu_has(X86_FEATURE_TOPOEXT)) |
2e8458df AH |
597 | cpuid_count(0x8000001d, index, &eax.full, |
598 | &ebx.full, &ecx.full, &edx); | |
599 | else | |
600 | amd_cpuid4(index, &eax, &ebx, &ecx); | |
f658bcfb | 601 | amd_init_l3_cache(this_leaf, index); |
7a4983bb IM |
602 | } else { |
603 | cpuid_count(4, index, &eax.full, &ebx.full, &ecx.full, &edx); | |
604 | } | |
605 | ||
0d55ba46 | 606 | if (eax.split.type == CTYPE_NULL) |
e2cac789 | 607 | return -EIO; /* better error ? */ |
1da177e4 | 608 | |
240cd6a8 AK |
609 | this_leaf->eax = eax; |
610 | this_leaf->ebx = ebx; | |
611 | this_leaf->ecx = ecx; | |
7a4983bb IM |
612 | this_leaf->size = (ecx.split.number_of_sets + 1) * |
613 | (ebx.split.coherency_line_size + 1) * | |
614 | (ebx.split.physical_line_partition + 1) * | |
615 | (ebx.split.ways_of_associativity + 1); | |
1da177e4 LT |
616 | return 0; |
617 | } | |
618 | ||
148f9bb8 | 619 | static int find_num_cache_leaves(struct cpuinfo_x86 *c) |
1da177e4 | 620 | { |
04a15418 | 621 | unsigned int eax, ebx, ecx, edx, op; |
1da177e4 | 622 | union _cpuid4_leaf_eax cache_eax; |
d16aafff | 623 | int i = -1; |
1da177e4 | 624 | |
04a15418 AH |
625 | if (c->x86_vendor == X86_VENDOR_AMD) |
626 | op = 0x8000001d; | |
627 | else | |
628 | op = 4; | |
629 | ||
d16aafff SS |
630 | do { |
631 | ++i; | |
04a15418 AH |
632 | /* Do cpuid(op) loop to find out num_cache_leaves */ |
633 | cpuid_count(op, i, &eax, &ebx, &ecx, &edx); | |
1da177e4 | 634 | cache_eax.full = eax; |
0d55ba46 | 635 | } while (cache_eax.split.type != CTYPE_NULL); |
d16aafff | 636 | return i; |
1da177e4 LT |
637 | } |
638 | ||
148f9bb8 | 639 | void init_amd_cacheinfo(struct cpuinfo_x86 *c) |
04a15418 AH |
640 | { |
641 | ||
362f924b | 642 | if (boot_cpu_has(X86_FEATURE_TOPOEXT)) { |
04a15418 AH |
643 | num_cache_leaves = find_num_cache_leaves(c); |
644 | } else if (c->extended_cpuid_level >= 0x80000006) { | |
645 | if (cpuid_edx(0x80000006) & 0xf000) | |
646 | num_cache_leaves = 4; | |
647 | else | |
648 | num_cache_leaves = 3; | |
649 | } | |
650 | } | |
651 | ||
148f9bb8 | 652 | unsigned int init_intel_cacheinfo(struct cpuinfo_x86 *c) |
1da177e4 | 653 | { |
8bdbd962 AC |
654 | /* Cache sizes */ |
655 | unsigned int trace = 0, l1i = 0, l1d = 0, l2 = 0, l3 = 0; | |
1da177e4 LT |
656 | unsigned int new_l1d = 0, new_l1i = 0; /* Cache sizes from cpuid(4) */ |
657 | unsigned int new_l2 = 0, new_l3 = 0, i; /* Cache sizes from cpuid(4) */ | |
1e9f28fa | 658 | unsigned int l2_id = 0, l3_id = 0, num_threads_sharing, index_msb; |
c8e56d20 | 659 | #ifdef CONFIG_SMP |
92cb7612 | 660 | unsigned int cpu = c->cpu_index; |
1e9f28fa | 661 | #endif |
1da177e4 | 662 | |
f2d0d263 | 663 | if (c->cpuid_level > 3) { |
1da177e4 LT |
664 | static int is_initialized; |
665 | ||
666 | if (is_initialized == 0) { | |
667 | /* Init num_cache_leaves from boot CPU */ | |
04a15418 | 668 | num_cache_leaves = find_num_cache_leaves(c); |
1da177e4 LT |
669 | is_initialized++; |
670 | } | |
671 | ||
672 | /* | |
673 | * Whenever possible use cpuid(4), deterministic cache | |
674 | * parameters cpuid leaf to find the cache details | |
675 | */ | |
676 | for (i = 0; i < num_cache_leaves; i++) { | |
719038de | 677 | struct _cpuid4_info_regs this_leaf = {}; |
1da177e4 LT |
678 | int retval; |
679 | ||
f9b90566 | 680 | retval = cpuid4_cache_lookup_regs(i, &this_leaf); |
719038de BP |
681 | if (retval < 0) |
682 | continue; | |
683 | ||
684 | switch (this_leaf.eax.split.level) { | |
685 | case 1: | |
0d55ba46 | 686 | if (this_leaf.eax.split.type == CTYPE_DATA) |
719038de | 687 | new_l1d = this_leaf.size/1024; |
0d55ba46 | 688 | else if (this_leaf.eax.split.type == CTYPE_INST) |
719038de BP |
689 | new_l1i = this_leaf.size/1024; |
690 | break; | |
691 | case 2: | |
692 | new_l2 = this_leaf.size/1024; | |
693 | num_threads_sharing = 1 + this_leaf.eax.split.num_threads_sharing; | |
694 | index_msb = get_count_order(num_threads_sharing); | |
695 | l2_id = c->apicid & ~((1 << index_msb) - 1); | |
696 | break; | |
697 | case 3: | |
698 | new_l3 = this_leaf.size/1024; | |
699 | num_threads_sharing = 1 + this_leaf.eax.split.num_threads_sharing; | |
700 | index_msb = get_count_order(num_threads_sharing); | |
701 | l3_id = c->apicid & ~((1 << index_msb) - 1); | |
702 | break; | |
703 | default: | |
704 | break; | |
1da177e4 LT |
705 | } |
706 | } | |
707 | } | |
b06be912 SL |
708 | /* |
709 | * Don't use cpuid2 if cpuid4 is supported. For P4, we use cpuid2 for | |
710 | * trace cache | |
711 | */ | |
712 | if ((num_cache_leaves == 0 || c->x86 == 15) && c->cpuid_level > 1) { | |
1da177e4 | 713 | /* supports eax=2 call */ |
c1666e66 HH |
714 | int j, n; |
715 | unsigned int regs[4]; | |
1da177e4 | 716 | unsigned char *dp = (unsigned char *)regs; |
b06be912 SL |
717 | int only_trace = 0; |
718 | ||
719 | if (num_cache_leaves != 0 && c->x86 == 15) | |
720 | only_trace = 1; | |
1da177e4 LT |
721 | |
722 | /* Number of times to iterate */ | |
723 | n = cpuid_eax(2) & 0xFF; | |
724 | ||
8bdbd962 | 725 | for (i = 0 ; i < n ; i++) { |
1da177e4 LT |
726 | cpuid(2, ®s[0], ®s[1], ®s[2], ®s[3]); |
727 | ||
728 | /* If bit 31 is set, this is an unknown format */ | |
8bdbd962 AC |
729 | for (j = 0 ; j < 3 ; j++) |
730 | if (regs[j] & (1 << 31)) | |
731 | regs[j] = 0; | |
1da177e4 LT |
732 | |
733 | /* Byte 0 is level count, not a descriptor */ | |
8bdbd962 | 734 | for (j = 1 ; j < 16 ; j++) { |
1da177e4 LT |
735 | unsigned char des = dp[j]; |
736 | unsigned char k = 0; | |
737 | ||
738 | /* look up this descriptor in the table */ | |
8bdbd962 | 739 | while (cache_table[k].descriptor != 0) { |
1da177e4 | 740 | if (cache_table[k].descriptor == des) { |
b06be912 SL |
741 | if (only_trace && cache_table[k].cache_type != LVL_TRACE) |
742 | break; | |
1da177e4 LT |
743 | switch (cache_table[k].cache_type) { |
744 | case LVL_1_INST: | |
745 | l1i += cache_table[k].size; | |
746 | break; | |
747 | case LVL_1_DATA: | |
748 | l1d += cache_table[k].size; | |
749 | break; | |
750 | case LVL_2: | |
751 | l2 += cache_table[k].size; | |
752 | break; | |
753 | case LVL_3: | |
754 | l3 += cache_table[k].size; | |
755 | break; | |
756 | case LVL_TRACE: | |
757 | trace += cache_table[k].size; | |
758 | break; | |
759 | } | |
760 | ||
761 | break; | |
762 | } | |
763 | ||
764 | k++; | |
765 | } | |
766 | } | |
767 | } | |
b06be912 | 768 | } |
1da177e4 | 769 | |
b06be912 SL |
770 | if (new_l1d) |
771 | l1d = new_l1d; | |
1da177e4 | 772 | |
b06be912 SL |
773 | if (new_l1i) |
774 | l1i = new_l1i; | |
1da177e4 | 775 | |
b06be912 SL |
776 | if (new_l2) { |
777 | l2 = new_l2; | |
c8e56d20 | 778 | #ifdef CONFIG_SMP |
b6278470 | 779 | per_cpu(cpu_llc_id, cpu) = l2_id; |
1e9f28fa | 780 | #endif |
b06be912 | 781 | } |
1da177e4 | 782 | |
b06be912 SL |
783 | if (new_l3) { |
784 | l3 = new_l3; | |
c8e56d20 | 785 | #ifdef CONFIG_SMP |
b6278470 | 786 | per_cpu(cpu_llc_id, cpu) = l3_id; |
1e9f28fa | 787 | #endif |
1da177e4 LT |
788 | } |
789 | ||
c8e56d20 | 790 | #ifdef CONFIG_SMP |
2a226155 PZ |
791 | /* |
792 | * If cpu_llc_id is not yet set, this means cpuid_level < 4 which in | |
793 | * turns means that the only possibility is SMT (as indicated in | |
794 | * cpuid1). Since cpuid2 doesn't specify shared caches, and we know | |
795 | * that SMT shares all caches, we can unconditionally set cpu_llc_id to | |
796 | * c->phys_proc_id. | |
797 | */ | |
798 | if (per_cpu(cpu_llc_id, cpu) == BAD_APICID) | |
799 | per_cpu(cpu_llc_id, cpu) = c->phys_proc_id; | |
800 | #endif | |
801 | ||
b06be912 SL |
802 | c->x86_cache_size = l3 ? l3 : (l2 ? l2 : (l1i+l1d)); |
803 | ||
1da177e4 LT |
804 | return l2; |
805 | } | |
806 | ||
0d55ba46 SH |
807 | static int __cache_amd_cpumap_setup(unsigned int cpu, int index, |
808 | struct _cpuid4_info_regs *base) | |
1da177e4 | 809 | { |
0d55ba46 SH |
810 | struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu); |
811 | struct cacheinfo *this_leaf; | |
27d3a8a2 | 812 | int i, sibling; |
1da177e4 | 813 | |
362f924b | 814 | if (boot_cpu_has(X86_FEATURE_TOPOEXT)) { |
27d3a8a2 AH |
815 | unsigned int apicid, nshared, first, last; |
816 | ||
0d55ba46 SH |
817 | this_leaf = this_cpu_ci->info_list + index; |
818 | nshared = base->eax.split.num_threads_sharing + 1; | |
27d3a8a2 AH |
819 | apicid = cpu_data(cpu).apicid; |
820 | first = apicid - (apicid % nshared); | |
821 | last = first + nshared - 1; | |
822 | ||
823 | for_each_online_cpu(i) { | |
0d55ba46 SH |
824 | this_cpu_ci = get_cpu_cacheinfo(i); |
825 | if (!this_cpu_ci->info_list) | |
826 | continue; | |
827 | ||
27d3a8a2 AH |
828 | apicid = cpu_data(i).apicid; |
829 | if ((apicid < first) || (apicid > last)) | |
830 | continue; | |
0d55ba46 SH |
831 | |
832 | this_leaf = this_cpu_ci->info_list + index; | |
27d3a8a2 AH |
833 | |
834 | for_each_online_cpu(sibling) { | |
835 | apicid = cpu_data(sibling).apicid; | |
836 | if ((apicid < first) || (apicid > last)) | |
ebb682f5 | 837 | continue; |
0d55ba46 SH |
838 | cpumask_set_cpu(sibling, |
839 | &this_leaf->shared_cpu_map); | |
ebb682f5 | 840 | } |
a326e948 | 841 | } |
27d3a8a2 AH |
842 | } else if (index == 3) { |
843 | for_each_cpu(i, cpu_llc_shared_mask(cpu)) { | |
0d55ba46 SH |
844 | this_cpu_ci = get_cpu_cacheinfo(i); |
845 | if (!this_cpu_ci->info_list) | |
32c32338 | 846 | continue; |
0d55ba46 | 847 | this_leaf = this_cpu_ci->info_list + index; |
27d3a8a2 | 848 | for_each_cpu(sibling, cpu_llc_shared_mask(cpu)) { |
32c32338 AH |
849 | if (!cpu_online(sibling)) |
850 | continue; | |
0d55ba46 SH |
851 | cpumask_set_cpu(sibling, |
852 | &this_leaf->shared_cpu_map); | |
32c32338 AH |
853 | } |
854 | } | |
27d3a8a2 AH |
855 | } else |
856 | return 0; | |
32c32338 | 857 | |
27d3a8a2 | 858 | return 1; |
32c32338 AH |
859 | } |
860 | ||
0d55ba46 SH |
861 | static void __cache_cpumap_setup(unsigned int cpu, int index, |
862 | struct _cpuid4_info_regs *base) | |
32c32338 | 863 | { |
0d55ba46 SH |
864 | struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu); |
865 | struct cacheinfo *this_leaf, *sibling_leaf; | |
32c32338 AH |
866 | unsigned long num_threads_sharing; |
867 | int index_msb, i; | |
868 | struct cpuinfo_x86 *c = &cpu_data(cpu); | |
869 | ||
870 | if (c->x86_vendor == X86_VENDOR_AMD) { | |
0d55ba46 | 871 | if (__cache_amd_cpumap_setup(cpu, index, base)) |
32c32338 AH |
872 | return; |
873 | } | |
874 | ||
0d55ba46 SH |
875 | this_leaf = this_cpu_ci->info_list + index; |
876 | num_threads_sharing = 1 + base->eax.split.num_threads_sharing; | |
1da177e4 | 877 | |
0d55ba46 | 878 | cpumask_set_cpu(cpu, &this_leaf->shared_cpu_map); |
1da177e4 | 879 | if (num_threads_sharing == 1) |
0d55ba46 | 880 | return; |
e2cac789 | 881 | |
0d55ba46 | 882 | index_msb = get_count_order(num_threads_sharing); |
b7d11a76 | 883 | |
0d55ba46 SH |
884 | for_each_online_cpu(i) |
885 | if (cpu_data(i).apicid >> index_msb == c->apicid >> index_msb) { | |
886 | struct cpu_cacheinfo *sib_cpu_ci = get_cpu_cacheinfo(i); | |
ef1d7151 | 887 | |
0d55ba46 SH |
888 | if (i == cpu || !sib_cpu_ci->info_list) |
889 | continue;/* skip if itself or no cacheinfo */ | |
890 | sibling_leaf = sib_cpu_ci->info_list + index; | |
891 | cpumask_set_cpu(i, &this_leaf->shared_cpu_map); | |
892 | cpumask_set_cpu(cpu, &sibling_leaf->shared_cpu_map); | |
ef1d7151 | 893 | } |
b2bb8554 MT |
894 | } |
895 | ||
0d55ba46 SH |
896 | static void ci_leaf_init(struct cacheinfo *this_leaf, |
897 | struct _cpuid4_info_regs *base) | |
b2bb8554 | 898 | { |
d57e3ab7 FY |
899 | this_leaf->id = base->id; |
900 | this_leaf->attributes = CACHE_ID; | |
0d55ba46 SH |
901 | this_leaf->level = base->eax.split.level; |
902 | this_leaf->type = cache_type_map[base->eax.split.type]; | |
903 | this_leaf->coherency_line_size = | |
904 | base->ebx.split.coherency_line_size + 1; | |
905 | this_leaf->ways_of_associativity = | |
906 | base->ebx.split.ways_of_associativity + 1; | |
907 | this_leaf->size = base->size; | |
908 | this_leaf->number_of_sets = base->ecx.split.number_of_sets + 1; | |
909 | this_leaf->physical_line_partition = | |
910 | base->ebx.split.physical_line_partition + 1; | |
911 | this_leaf->priv = base->nb; | |
1da177e4 LT |
912 | } |
913 | ||
0d55ba46 | 914 | static int __init_cache_level(unsigned int cpu) |
fb0f330e | 915 | { |
0d55ba46 | 916 | struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu); |
fb0f330e | 917 | |
0d55ba46 | 918 | if (!num_cache_leaves) |
1da177e4 | 919 | return -ENOENT; |
0d55ba46 SH |
920 | if (!this_cpu_ci) |
921 | return -EINVAL; | |
922 | this_cpu_ci->num_levels = 3; | |
923 | this_cpu_ci->num_leaves = num_cache_leaves; | |
1da177e4 | 924 | return 0; |
1da177e4 LT |
925 | } |
926 | ||
d57e3ab7 FY |
927 | /* |
928 | * The max shared threads number comes from CPUID.4:EAX[25-14] with input | |
929 | * ECX as cache index. Then right shift apicid by the number's order to get | |
930 | * cache id for this cache node. | |
931 | */ | |
932 | static void get_cache_id(int cpu, struct _cpuid4_info_regs *id4_regs) | |
933 | { | |
934 | struct cpuinfo_x86 *c = &cpu_data(cpu); | |
935 | unsigned long num_threads_sharing; | |
936 | int index_msb; | |
937 | ||
938 | num_threads_sharing = 1 + id4_regs->eax.split.num_threads_sharing; | |
939 | index_msb = get_count_order(num_threads_sharing); | |
940 | id4_regs->id = c->apicid >> index_msb; | |
941 | } | |
942 | ||
0d55ba46 | 943 | static int __populate_cache_leaves(unsigned int cpu) |
1da177e4 | 944 | { |
0d55ba46 SH |
945 | unsigned int idx, ret; |
946 | struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu); | |
947 | struct cacheinfo *this_leaf = this_cpu_ci->info_list; | |
948 | struct _cpuid4_info_regs id4_regs = {}; | |
1da177e4 | 949 | |
0d55ba46 SH |
950 | for (idx = 0; idx < this_cpu_ci->num_leaves; idx++) { |
951 | ret = cpuid4_cache_lookup_regs(idx, &id4_regs); | |
952 | if (ret) | |
953 | return ret; | |
d57e3ab7 | 954 | get_cache_id(cpu, &id4_regs); |
0d55ba46 SH |
955 | ci_leaf_init(this_leaf++, &id4_regs); |
956 | __cache_cpumap_setup(cpu, idx, &id4_regs); | |
1da177e4 | 957 | } |
fac51482 SH |
958 | this_cpu_ci->cpu_map_populated = true; |
959 | ||
8b2b9c1a | 960 | return 0; |
1da177e4 LT |
961 | } |
962 | ||
0d55ba46 SH |
963 | DEFINE_SMP_CALL_CACHE_FUNCTION(init_cache_level) |
964 | DEFINE_SMP_CALL_CACHE_FUNCTION(populate_cache_leaves) |