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Commit | Line | Data |
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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
1da177e4 | 2 | /* |
3f79410c | 3 | * Routines to identify caches on Intel CPU. |
1da177e4 | 4 | * |
cdcf772e IM |
5 | * Changes: |
6 | * Venkatesh Pallipadi : Adding cache identification through cpuid(4) | |
8bdbd962 | 7 | * Ashok Raj <ashok.raj@intel.com>: Work with CPU hotplug infrastructure. |
67cddd94 | 8 | * Andi Kleen / Andreas Herrmann : CPUID4 emulation on AMD. |
1da177e4 LT |
9 | */ |
10 | ||
1da177e4 | 11 | #include <linux/slab.h> |
0d55ba46 | 12 | #include <linux/cacheinfo.h> |
1da177e4 | 13 | #include <linux/cpu.h> |
4e57b681 | 14 | #include <linux/sched.h> |
5b825c3a | 15 | #include <linux/capability.h> |
0d55ba46 | 16 | #include <linux/sysfs.h> |
a24e8d36 | 17 | #include <linux/pci.h> |
1da177e4 | 18 | |
cd4d09ec | 19 | #include <asm/cpufeature.h> |
23ac4ae8 | 20 | #include <asm/amd_nb.h> |
dcf39daf | 21 | #include <asm/smp.h> |
1da177e4 LT |
22 | |
23 | #define LVL_1_INST 1 | |
24 | #define LVL_1_DATA 2 | |
25 | #define LVL_2 3 | |
26 | #define LVL_3 4 | |
27 | #define LVL_TRACE 5 | |
28 | ||
8bdbd962 | 29 | struct _cache_table { |
1da177e4 LT |
30 | unsigned char descriptor; |
31 | char cache_type; | |
32 | short size; | |
33 | }; | |
34 | ||
2ca49b2f DJ |
35 | #define MB(x) ((x) * 1024) |
36 | ||
8bdbd962 AC |
37 | /* All the cache descriptor types we care about (no TLB or |
38 | trace cache entries) */ | |
39 | ||
148f9bb8 | 40 | static const struct _cache_table cache_table[] = |
1da177e4 LT |
41 | { |
42 | { 0x06, LVL_1_INST, 8 }, /* 4-way set assoc, 32 byte line size */ | |
43 | { 0x08, LVL_1_INST, 16 }, /* 4-way set assoc, 32 byte line size */ | |
9a8ecae8 | 44 | { 0x09, LVL_1_INST, 32 }, /* 4-way set assoc, 64 byte line size */ |
1da177e4 LT |
45 | { 0x0a, LVL_1_DATA, 8 }, /* 2 way set assoc, 32 byte line size */ |
46 | { 0x0c, LVL_1_DATA, 16 }, /* 4-way set assoc, 32 byte line size */ | |
9a8ecae8 | 47 | { 0x0d, LVL_1_DATA, 16 }, /* 4-way set assoc, 64 byte line size */ |
fb87ec38 | 48 | { 0x0e, LVL_1_DATA, 24 }, /* 6-way set assoc, 64 byte line size */ |
9a8ecae8 | 49 | { 0x21, LVL_2, 256 }, /* 8-way set assoc, 64 byte line size */ |
1da177e4 | 50 | { 0x22, LVL_3, 512 }, /* 4-way set assoc, sectored cache, 64 byte line size */ |
2ca49b2f DJ |
51 | { 0x23, LVL_3, MB(1) }, /* 8-way set assoc, sectored cache, 64 byte line size */ |
52 | { 0x25, LVL_3, MB(2) }, /* 8-way set assoc, sectored cache, 64 byte line size */ | |
53 | { 0x29, LVL_3, MB(4) }, /* 8-way set assoc, sectored cache, 64 byte line size */ | |
1da177e4 LT |
54 | { 0x2c, LVL_1_DATA, 32 }, /* 8-way set assoc, 64 byte line size */ |
55 | { 0x30, LVL_1_INST, 32 }, /* 8-way set assoc, 64 byte line size */ | |
56 | { 0x39, LVL_2, 128 }, /* 4-way set assoc, sectored cache, 64 byte line size */ | |
6fe8f479 | 57 | { 0x3a, LVL_2, 192 }, /* 6-way set assoc, sectored cache, 64 byte line size */ |
1da177e4 LT |
58 | { 0x3b, LVL_2, 128 }, /* 2-way set assoc, sectored cache, 64 byte line size */ |
59 | { 0x3c, LVL_2, 256 }, /* 4-way set assoc, sectored cache, 64 byte line size */ | |
6fe8f479 DJ |
60 | { 0x3d, LVL_2, 384 }, /* 6-way set assoc, sectored cache, 64 byte line size */ |
61 | { 0x3e, LVL_2, 512 }, /* 4-way set assoc, sectored cache, 64 byte line size */ | |
04fa11ea | 62 | { 0x3f, LVL_2, 256 }, /* 2-way set assoc, 64 byte line size */ |
1da177e4 LT |
63 | { 0x41, LVL_2, 128 }, /* 4-way set assoc, 32 byte line size */ |
64 | { 0x42, LVL_2, 256 }, /* 4-way set assoc, 32 byte line size */ | |
65 | { 0x43, LVL_2, 512 }, /* 4-way set assoc, 32 byte line size */ | |
2ca49b2f DJ |
66 | { 0x44, LVL_2, MB(1) }, /* 4-way set assoc, 32 byte line size */ |
67 | { 0x45, LVL_2, MB(2) }, /* 4-way set assoc, 32 byte line size */ | |
68 | { 0x46, LVL_3, MB(4) }, /* 4-way set assoc, 64 byte line size */ | |
69 | { 0x47, LVL_3, MB(8) }, /* 8-way set assoc, 64 byte line size */ | |
fb87ec38 | 70 | { 0x48, LVL_2, MB(3) }, /* 12-way set assoc, 64 byte line size */ |
2ca49b2f DJ |
71 | { 0x49, LVL_3, MB(4) }, /* 16-way set assoc, 64 byte line size */ |
72 | { 0x4a, LVL_3, MB(6) }, /* 12-way set assoc, 64 byte line size */ | |
73 | { 0x4b, LVL_3, MB(8) }, /* 16-way set assoc, 64 byte line size */ | |
74 | { 0x4c, LVL_3, MB(12) }, /* 12-way set assoc, 64 byte line size */ | |
75 | { 0x4d, LVL_3, MB(16) }, /* 16-way set assoc, 64 byte line size */ | |
76 | { 0x4e, LVL_2, MB(6) }, /* 24-way set assoc, 64 byte line size */ | |
1da177e4 LT |
77 | { 0x60, LVL_1_DATA, 16 }, /* 8-way set assoc, sectored cache, 64 byte line size */ |
78 | { 0x66, LVL_1_DATA, 8 }, /* 4-way set assoc, sectored cache, 64 byte line size */ | |
79 | { 0x67, LVL_1_DATA, 16 }, /* 4-way set assoc, sectored cache, 64 byte line size */ | |
80 | { 0x68, LVL_1_DATA, 32 }, /* 4-way set assoc, sectored cache, 64 byte line size */ | |
81 | { 0x70, LVL_TRACE, 12 }, /* 8-way set assoc */ | |
82 | { 0x71, LVL_TRACE, 16 }, /* 8-way set assoc */ | |
83 | { 0x72, LVL_TRACE, 32 }, /* 8-way set assoc */ | |
6fe8f479 | 84 | { 0x73, LVL_TRACE, 64 }, /* 8-way set assoc */ |
2ca49b2f DJ |
85 | { 0x78, LVL_2, MB(1) }, /* 4-way set assoc, 64 byte line size */ |
86 | { 0x79, LVL_2, 128 }, /* 8-way set assoc, sectored cache, 64 byte line size */ | |
87 | { 0x7a, LVL_2, 256 }, /* 8-way set assoc, sectored cache, 64 byte line size */ | |
88 | { 0x7b, LVL_2, 512 }, /* 8-way set assoc, sectored cache, 64 byte line size */ | |
89 | { 0x7c, LVL_2, MB(1) }, /* 8-way set assoc, sectored cache, 64 byte line size */ | |
90 | { 0x7d, LVL_2, MB(2) }, /* 8-way set assoc, 64 byte line size */ | |
91 | { 0x7f, LVL_2, 512 }, /* 2-way set assoc, 64 byte line size */ | |
fb87ec38 | 92 | { 0x80, LVL_2, 512 }, /* 8-way set assoc, 64 byte line size */ |
2ca49b2f DJ |
93 | { 0x82, LVL_2, 256 }, /* 8-way set assoc, 32 byte line size */ |
94 | { 0x83, LVL_2, 512 }, /* 8-way set assoc, 32 byte line size */ | |
95 | { 0x84, LVL_2, MB(1) }, /* 8-way set assoc, 32 byte line size */ | |
96 | { 0x85, LVL_2, MB(2) }, /* 8-way set assoc, 32 byte line size */ | |
97 | { 0x86, LVL_2, 512 }, /* 4-way set assoc, 64 byte line size */ | |
98 | { 0x87, LVL_2, MB(1) }, /* 8-way set assoc, 64 byte line size */ | |
99 | { 0xd0, LVL_3, 512 }, /* 4-way set assoc, 64 byte line size */ | |
100 | { 0xd1, LVL_3, MB(1) }, /* 4-way set assoc, 64 byte line size */ | |
101 | { 0xd2, LVL_3, MB(2) }, /* 4-way set assoc, 64 byte line size */ | |
102 | { 0xd6, LVL_3, MB(1) }, /* 8-way set assoc, 64 byte line size */ | |
103 | { 0xd7, LVL_3, MB(2) }, /* 8-way set assoc, 64 byte line size */ | |
104 | { 0xd8, LVL_3, MB(4) }, /* 12-way set assoc, 64 byte line size */ | |
105 | { 0xdc, LVL_3, MB(2) }, /* 12-way set assoc, 64 byte line size */ | |
106 | { 0xdd, LVL_3, MB(4) }, /* 12-way set assoc, 64 byte line size */ | |
107 | { 0xde, LVL_3, MB(8) }, /* 12-way set assoc, 64 byte line size */ | |
108 | { 0xe2, LVL_3, MB(2) }, /* 16-way set assoc, 64 byte line size */ | |
109 | { 0xe3, LVL_3, MB(4) }, /* 16-way set assoc, 64 byte line size */ | |
110 | { 0xe4, LVL_3, MB(8) }, /* 16-way set assoc, 64 byte line size */ | |
111 | { 0xea, LVL_3, MB(12) }, /* 24-way set assoc, 64 byte line size */ | |
112 | { 0xeb, LVL_3, MB(18) }, /* 24-way set assoc, 64 byte line size */ | |
113 | { 0xec, LVL_3, MB(24) }, /* 24-way set assoc, 64 byte line size */ | |
1da177e4 LT |
114 | { 0x00, 0, 0} |
115 | }; | |
116 | ||
117 | ||
8bdbd962 | 118 | enum _cache_type { |
0d55ba46 SH |
119 | CTYPE_NULL = 0, |
120 | CTYPE_DATA = 1, | |
121 | CTYPE_INST = 2, | |
122 | CTYPE_UNIFIED = 3 | |
1da177e4 LT |
123 | }; |
124 | ||
125 | union _cpuid4_leaf_eax { | |
126 | struct { | |
127 | enum _cache_type type:5; | |
128 | unsigned int level:3; | |
129 | unsigned int is_self_initializing:1; | |
130 | unsigned int is_fully_associative:1; | |
131 | unsigned int reserved:4; | |
132 | unsigned int num_threads_sharing:12; | |
133 | unsigned int num_cores_on_die:6; | |
134 | } split; | |
135 | u32 full; | |
136 | }; | |
137 | ||
138 | union _cpuid4_leaf_ebx { | |
139 | struct { | |
140 | unsigned int coherency_line_size:12; | |
141 | unsigned int physical_line_partition:10; | |
142 | unsigned int ways_of_associativity:10; | |
143 | } split; | |
144 | u32 full; | |
145 | }; | |
146 | ||
147 | union _cpuid4_leaf_ecx { | |
148 | struct { | |
149 | unsigned int number_of_sets:32; | |
150 | } split; | |
151 | u32 full; | |
152 | }; | |
153 | ||
b7d11a76 | 154 | struct _cpuid4_info_regs { |
1da177e4 LT |
155 | union _cpuid4_leaf_eax eax; |
156 | union _cpuid4_leaf_ebx ebx; | |
157 | union _cpuid4_leaf_ecx ecx; | |
d57e3ab7 | 158 | unsigned int id; |
1da177e4 | 159 | unsigned long size; |
d2946041 | 160 | struct amd_northbridge *nb; |
f9b90566 MT |
161 | }; |
162 | ||
18ab2cd3 | 163 | static unsigned short num_cache_leaves; |
240cd6a8 AK |
164 | |
165 | /* AMD doesn't have CPUID4. Emulate it here to report the same | |
166 | information to the user. This makes some assumptions about the machine: | |
67cddd94 | 167 | L2 not shared, no SMT etc. that is currently true on AMD CPUs. |
240cd6a8 AK |
168 | |
169 | In theory the TLBs could be reported as fake type (they are in "dummy"). | |
170 | Maybe later */ | |
171 | union l1_cache { | |
172 | struct { | |
8bdbd962 AC |
173 | unsigned line_size:8; |
174 | unsigned lines_per_tag:8; | |
175 | unsigned assoc:8; | |
176 | unsigned size_in_kb:8; | |
240cd6a8 AK |
177 | }; |
178 | unsigned val; | |
179 | }; | |
180 | ||
181 | union l2_cache { | |
182 | struct { | |
8bdbd962 AC |
183 | unsigned line_size:8; |
184 | unsigned lines_per_tag:4; | |
185 | unsigned assoc:4; | |
186 | unsigned size_in_kb:16; | |
240cd6a8 AK |
187 | }; |
188 | unsigned val; | |
189 | }; | |
190 | ||
67cddd94 AK |
191 | union l3_cache { |
192 | struct { | |
8bdbd962 AC |
193 | unsigned line_size:8; |
194 | unsigned lines_per_tag:4; | |
195 | unsigned assoc:4; | |
196 | unsigned res:2; | |
197 | unsigned size_encoded:14; | |
67cddd94 AK |
198 | }; |
199 | unsigned val; | |
200 | }; | |
201 | ||
148f9bb8 | 202 | static const unsigned short assocs[] = { |
6265ff19 AH |
203 | [1] = 1, |
204 | [2] = 2, | |
205 | [4] = 4, | |
206 | [6] = 8, | |
207 | [8] = 16, | |
208 | [0xa] = 32, | |
209 | [0xb] = 48, | |
67cddd94 | 210 | [0xc] = 64, |
6265ff19 AH |
211 | [0xd] = 96, |
212 | [0xe] = 128, | |
213 | [0xf] = 0xffff /* fully associative - no way to show this currently */ | |
67cddd94 AK |
214 | }; |
215 | ||
148f9bb8 PG |
216 | static const unsigned char levels[] = { 1, 1, 2, 3 }; |
217 | static const unsigned char types[] = { 1, 2, 3, 3 }; | |
240cd6a8 | 218 | |
0d55ba46 SH |
219 | static const enum cache_type cache_type_map[] = { |
220 | [CTYPE_NULL] = CACHE_TYPE_NOCACHE, | |
221 | [CTYPE_DATA] = CACHE_TYPE_DATA, | |
222 | [CTYPE_INST] = CACHE_TYPE_INST, | |
223 | [CTYPE_UNIFIED] = CACHE_TYPE_UNIFIED, | |
224 | }; | |
225 | ||
148f9bb8 | 226 | static void |
cdcf772e IM |
227 | amd_cpuid4(int leaf, union _cpuid4_leaf_eax *eax, |
228 | union _cpuid4_leaf_ebx *ebx, | |
229 | union _cpuid4_leaf_ecx *ecx) | |
240cd6a8 AK |
230 | { |
231 | unsigned dummy; | |
232 | unsigned line_size, lines_per_tag, assoc, size_in_kb; | |
233 | union l1_cache l1i, l1d; | |
234 | union l2_cache l2; | |
67cddd94 AK |
235 | union l3_cache l3; |
236 | union l1_cache *l1 = &l1d; | |
240cd6a8 AK |
237 | |
238 | eax->full = 0; | |
239 | ebx->full = 0; | |
240 | ecx->full = 0; | |
241 | ||
242 | cpuid(0x80000005, &dummy, &dummy, &l1d.val, &l1i.val); | |
67cddd94 | 243 | cpuid(0x80000006, &dummy, &dummy, &l2.val, &l3.val); |
240cd6a8 | 244 | |
67cddd94 AK |
245 | switch (leaf) { |
246 | case 1: | |
247 | l1 = &l1i; | |
248 | case 0: | |
249 | if (!l1->val) | |
250 | return; | |
a326e948 | 251 | assoc = assocs[l1->assoc]; |
240cd6a8 AK |
252 | line_size = l1->line_size; |
253 | lines_per_tag = l1->lines_per_tag; | |
254 | size_in_kb = l1->size_in_kb; | |
67cddd94 AK |
255 | break; |
256 | case 2: | |
257 | if (!l2.val) | |
258 | return; | |
a326e948 | 259 | assoc = assocs[l2.assoc]; |
240cd6a8 AK |
260 | line_size = l2.line_size; |
261 | lines_per_tag = l2.lines_per_tag; | |
262 | /* cpu_data has errata corrections for K7 applied */ | |
7b543a53 | 263 | size_in_kb = __this_cpu_read(cpu_info.x86_cache_size); |
67cddd94 AK |
264 | break; |
265 | case 3: | |
266 | if (!l3.val) | |
267 | return; | |
a326e948 | 268 | assoc = assocs[l3.assoc]; |
67cddd94 AK |
269 | line_size = l3.line_size; |
270 | lines_per_tag = l3.lines_per_tag; | |
271 | size_in_kb = l3.size_encoded * 512; | |
a326e948 AH |
272 | if (boot_cpu_has(X86_FEATURE_AMD_DCM)) { |
273 | size_in_kb = size_in_kb >> 1; | |
274 | assoc = assoc >> 1; | |
275 | } | |
67cddd94 AK |
276 | break; |
277 | default: | |
278 | return; | |
240cd6a8 AK |
279 | } |
280 | ||
67cddd94 AK |
281 | eax->split.is_self_initializing = 1; |
282 | eax->split.type = types[leaf]; | |
283 | eax->split.level = levels[leaf]; | |
a326e948 | 284 | eax->split.num_threads_sharing = 0; |
7b543a53 | 285 | eax->split.num_cores_on_die = __this_cpu_read(cpu_info.x86_max_cores) - 1; |
67cddd94 AK |
286 | |
287 | ||
a326e948 | 288 | if (assoc == 0xffff) |
240cd6a8 AK |
289 | eax->split.is_fully_associative = 1; |
290 | ebx->split.coherency_line_size = line_size - 1; | |
a326e948 | 291 | ebx->split.ways_of_associativity = assoc - 1; |
240cd6a8 AK |
292 | ebx->split.physical_line_partition = lines_per_tag - 1; |
293 | ecx->split.number_of_sets = (size_in_kb * 1024) / line_size / | |
294 | (ebx->split.ways_of_associativity + 1) - 1; | |
295 | } | |
1da177e4 | 296 | |
f76e39c5 | 297 | #if defined(CONFIG_AMD_NB) && defined(CONFIG_SYSFS) |
0d55ba46 | 298 | |
ba06edb6 BP |
299 | /* |
300 | * L3 cache descriptors | |
301 | */ | |
148f9bb8 | 302 | static void amd_calc_l3_indices(struct amd_northbridge *nb) |
048a8774 | 303 | { |
d2946041 | 304 | struct amd_l3_cache *l3 = &nb->l3_cache; |
048a8774 | 305 | unsigned int sc0, sc1, sc2, sc3; |
cb19060a | 306 | u32 val = 0; |
048a8774 | 307 | |
d2946041 | 308 | pci_read_config_dword(nb->misc, 0x1C4, &val); |
048a8774 BP |
309 | |
310 | /* calculate subcache sizes */ | |
9350f982 BP |
311 | l3->subcaches[0] = sc0 = !(val & BIT(0)); |
312 | l3->subcaches[1] = sc1 = !(val & BIT(4)); | |
77e75fc7 FA |
313 | |
314 | if (boot_cpu_data.x86 == 0x15) { | |
315 | l3->subcaches[0] = sc0 += !(val & BIT(1)); | |
316 | l3->subcaches[1] = sc1 += !(val & BIT(5)); | |
317 | } | |
318 | ||
9350f982 BP |
319 | l3->subcaches[2] = sc2 = !(val & BIT(8)) + !(val & BIT(9)); |
320 | l3->subcaches[3] = sc3 = !(val & BIT(12)) + !(val & BIT(13)); | |
321 | ||
732eacc0 | 322 | l3->indices = (max(max3(sc0, sc1, sc2), sc3) << 10) - 1; |
ba06edb6 BP |
323 | } |
324 | ||
8cc1176e BP |
325 | /* |
326 | * check whether a slot used for disabling an L3 index is occupied. | |
327 | * @l3: L3 cache descriptor | |
328 | * @slot: slot number (0..1) | |
329 | * | |
330 | * @returns: the disabled index if used or negative value if slot free. | |
331 | */ | |
18ab2cd3 | 332 | static int amd_get_l3_disable_slot(struct amd_northbridge *nb, unsigned slot) |
8cc1176e BP |
333 | { |
334 | unsigned int reg = 0; | |
335 | ||
d2946041 | 336 | pci_read_config_dword(nb->misc, 0x1BC + slot * 4, ®); |
8cc1176e BP |
337 | |
338 | /* check whether this slot is activated already */ | |
339 | if (reg & (3UL << 30)) | |
340 | return reg & 0xfff; | |
341 | ||
342 | return -1; | |
343 | } | |
344 | ||
0d55ba46 | 345 | static ssize_t show_cache_disable(struct cacheinfo *this_leaf, char *buf, |
59d3b388 | 346 | unsigned int slot) |
cb19060a | 347 | { |
8cc1176e | 348 | int index; |
0d55ba46 | 349 | struct amd_northbridge *nb = this_leaf->priv; |
cb19060a | 350 | |
0d55ba46 | 351 | index = amd_get_l3_disable_slot(nb, slot); |
8cc1176e BP |
352 | if (index >= 0) |
353 | return sprintf(buf, "%d\n", index); | |
cb19060a | 354 | |
8cc1176e | 355 | return sprintf(buf, "FREE\n"); |
cb19060a BP |
356 | } |
357 | ||
59d3b388 | 358 | #define SHOW_CACHE_DISABLE(slot) \ |
cb19060a | 359 | static ssize_t \ |
0d55ba46 SH |
360 | cache_disable_##slot##_show(struct device *dev, \ |
361 | struct device_attribute *attr, char *buf) \ | |
cb19060a | 362 | { \ |
0d55ba46 | 363 | struct cacheinfo *this_leaf = dev_get_drvdata(dev); \ |
59d3b388 | 364 | return show_cache_disable(this_leaf, buf, slot); \ |
cb19060a BP |
365 | } |
366 | SHOW_CACHE_DISABLE(0) | |
367 | SHOW_CACHE_DISABLE(1) | |
368 | ||
d2946041 | 369 | static void amd_l3_disable_index(struct amd_northbridge *nb, int cpu, |
59d3b388 BP |
370 | unsigned slot, unsigned long idx) |
371 | { | |
372 | int i; | |
373 | ||
374 | idx |= BIT(30); | |
375 | ||
376 | /* | |
377 | * disable index in all 4 subcaches | |
378 | */ | |
379 | for (i = 0; i < 4; i++) { | |
380 | u32 reg = idx | (i << 20); | |
381 | ||
d2946041 | 382 | if (!nb->l3_cache.subcaches[i]) |
59d3b388 BP |
383 | continue; |
384 | ||
d2946041 | 385 | pci_write_config_dword(nb->misc, 0x1BC + slot * 4, reg); |
59d3b388 BP |
386 | |
387 | /* | |
388 | * We need to WBINVD on a core on the node containing the L3 | |
389 | * cache which indices we disable therefore a simple wbinvd() | |
390 | * is not sufficient. | |
391 | */ | |
392 | wbinvd_on_cpu(cpu); | |
393 | ||
394 | reg |= BIT(31); | |
d2946041 | 395 | pci_write_config_dword(nb->misc, 0x1BC + slot * 4, reg); |
59d3b388 BP |
396 | } |
397 | } | |
398 | ||
8cc1176e BP |
399 | /* |
400 | * disable a L3 cache index by using a disable-slot | |
401 | * | |
402 | * @l3: L3 cache descriptor | |
403 | * @cpu: A CPU on the node containing the L3 cache | |
404 | * @slot: slot number (0..1) | |
405 | * @index: index to disable | |
406 | * | |
407 | * @return: 0 on success, error status on failure | |
408 | */ | |
18ab2cd3 GT |
409 | static int amd_set_l3_disable_slot(struct amd_northbridge *nb, int cpu, |
410 | unsigned slot, unsigned long index) | |
cb19060a | 411 | { |
8cc1176e | 412 | int ret = 0; |
cb19060a | 413 | |
42be4505 | 414 | /* check if @slot is already used or the index is already disabled */ |
d2946041 | 415 | ret = amd_get_l3_disable_slot(nb, slot); |
8cc1176e | 416 | if (ret >= 0) |
a720b2dd | 417 | return -EEXIST; |
cb19060a | 418 | |
d2946041 | 419 | if (index > nb->l3_cache.indices) |
8cc1176e BP |
420 | return -EINVAL; |
421 | ||
42be4505 | 422 | /* check whether the other slot has disabled the same index already */ |
d2946041 | 423 | if (index == amd_get_l3_disable_slot(nb, !slot)) |
a720b2dd | 424 | return -EEXIST; |
8cc1176e | 425 | |
d2946041 | 426 | amd_l3_disable_index(nb, cpu, slot, index); |
8cc1176e BP |
427 | |
428 | return 0; | |
429 | } | |
430 | ||
0d55ba46 SH |
431 | static ssize_t store_cache_disable(struct cacheinfo *this_leaf, |
432 | const char *buf, size_t count, | |
433 | unsigned int slot) | |
8cc1176e BP |
434 | { |
435 | unsigned long val = 0; | |
436 | int cpu, err = 0; | |
0d55ba46 | 437 | struct amd_northbridge *nb = this_leaf->priv; |
8cc1176e | 438 | |
cb19060a BP |
439 | if (!capable(CAP_SYS_ADMIN)) |
440 | return -EPERM; | |
441 | ||
0d55ba46 | 442 | cpu = cpumask_first(&this_leaf->shared_cpu_map); |
cb19060a | 443 | |
164109e3 | 444 | if (kstrtoul(buf, 10, &val) < 0) |
cb19060a BP |
445 | return -EINVAL; |
446 | ||
0d55ba46 | 447 | err = amd_set_l3_disable_slot(nb, cpu, slot, val); |
8cc1176e BP |
448 | if (err) { |
449 | if (err == -EEXIST) | |
1b74dde7 | 450 | pr_warn("L3 slot %d in use/index already disabled!\n", |
a720b2dd | 451 | slot); |
8cc1176e BP |
452 | return err; |
453 | } | |
cb19060a BP |
454 | return count; |
455 | } | |
456 | ||
59d3b388 | 457 | #define STORE_CACHE_DISABLE(slot) \ |
cb19060a | 458 | static ssize_t \ |
0d55ba46 SH |
459 | cache_disable_##slot##_store(struct device *dev, \ |
460 | struct device_attribute *attr, \ | |
461 | const char *buf, size_t count) \ | |
cb19060a | 462 | { \ |
0d55ba46 | 463 | struct cacheinfo *this_leaf = dev_get_drvdata(dev); \ |
59d3b388 | 464 | return store_cache_disable(this_leaf, buf, count, slot); \ |
8cb22bcb | 465 | } |
cb19060a BP |
466 | STORE_CACHE_DISABLE(0) |
467 | STORE_CACHE_DISABLE(1) | |
468 | ||
0d55ba46 SH |
469 | static ssize_t subcaches_show(struct device *dev, |
470 | struct device_attribute *attr, char *buf) | |
cabb5bd7 | 471 | { |
0d55ba46 SH |
472 | struct cacheinfo *this_leaf = dev_get_drvdata(dev); |
473 | int cpu = cpumask_first(&this_leaf->shared_cpu_map); | |
cabb5bd7 HR |
474 | |
475 | return sprintf(buf, "%x\n", amd_get_subcaches(cpu)); | |
476 | } | |
477 | ||
0d55ba46 SH |
478 | static ssize_t subcaches_store(struct device *dev, |
479 | struct device_attribute *attr, | |
480 | const char *buf, size_t count) | |
cabb5bd7 | 481 | { |
0d55ba46 SH |
482 | struct cacheinfo *this_leaf = dev_get_drvdata(dev); |
483 | int cpu = cpumask_first(&this_leaf->shared_cpu_map); | |
cabb5bd7 HR |
484 | unsigned long val; |
485 | ||
486 | if (!capable(CAP_SYS_ADMIN)) | |
487 | return -EPERM; | |
488 | ||
164109e3 | 489 | if (kstrtoul(buf, 16, &val) < 0) |
cabb5bd7 HR |
490 | return -EINVAL; |
491 | ||
492 | if (amd_set_subcaches(cpu, val)) | |
493 | return -EINVAL; | |
494 | ||
495 | return count; | |
496 | } | |
497 | ||
0d55ba46 SH |
498 | static DEVICE_ATTR_RW(cache_disable_0); |
499 | static DEVICE_ATTR_RW(cache_disable_1); | |
500 | static DEVICE_ATTR_RW(subcaches); | |
501 | ||
502 | static umode_t | |
503 | cache_private_attrs_is_visible(struct kobject *kobj, | |
504 | struct attribute *attr, int unused) | |
505 | { | |
506 | struct device *dev = kobj_to_dev(kobj); | |
507 | struct cacheinfo *this_leaf = dev_get_drvdata(dev); | |
508 | umode_t mode = attr->mode; | |
509 | ||
510 | if (!this_leaf->priv) | |
511 | return 0; | |
512 | ||
513 | if ((attr == &dev_attr_subcaches.attr) && | |
514 | amd_nb_has_feature(AMD_NB_L3_PARTITIONING)) | |
515 | return mode; | |
516 | ||
517 | if ((attr == &dev_attr_cache_disable_0.attr || | |
518 | attr == &dev_attr_cache_disable_1.attr) && | |
519 | amd_nb_has_feature(AMD_NB_L3_INDEX_DISABLE)) | |
520 | return mode; | |
521 | ||
522 | return 0; | |
523 | } | |
524 | ||
525 | static struct attribute_group cache_private_group = { | |
526 | .is_visible = cache_private_attrs_is_visible, | |
527 | }; | |
528 | ||
529 | static void init_amd_l3_attrs(void) | |
530 | { | |
531 | int n = 1; | |
532 | static struct attribute **amd_l3_attrs; | |
533 | ||
534 | if (amd_l3_attrs) /* already initialized */ | |
535 | return; | |
536 | ||
537 | if (amd_nb_has_feature(AMD_NB_L3_INDEX_DISABLE)) | |
538 | n += 2; | |
539 | if (amd_nb_has_feature(AMD_NB_L3_PARTITIONING)) | |
540 | n += 1; | |
541 | ||
542 | amd_l3_attrs = kcalloc(n, sizeof(*amd_l3_attrs), GFP_KERNEL); | |
543 | if (!amd_l3_attrs) | |
544 | return; | |
545 | ||
546 | n = 0; | |
547 | if (amd_nb_has_feature(AMD_NB_L3_INDEX_DISABLE)) { | |
548 | amd_l3_attrs[n++] = &dev_attr_cache_disable_0.attr; | |
549 | amd_l3_attrs[n++] = &dev_attr_cache_disable_1.attr; | |
550 | } | |
551 | if (amd_nb_has_feature(AMD_NB_L3_PARTITIONING)) | |
552 | amd_l3_attrs[n++] = &dev_attr_subcaches.attr; | |
cabb5bd7 | 553 | |
0d55ba46 SH |
554 | cache_private_group.attrs = amd_l3_attrs; |
555 | } | |
556 | ||
557 | const struct attribute_group * | |
558 | cache_get_priv_group(struct cacheinfo *this_leaf) | |
559 | { | |
560 | struct amd_northbridge *nb = this_leaf->priv; | |
561 | ||
37dea8c5 | 562 | if (this_leaf->level < 3 || !nb) |
0d55ba46 SH |
563 | return NULL; |
564 | ||
565 | if (nb && nb->l3_cache.indices) | |
566 | init_amd_l3_attrs(); | |
567 | ||
568 | return &cache_private_group; | |
569 | } | |
570 | ||
571 | static void amd_init_l3_cache(struct _cpuid4_info_regs *this_leaf, int index) | |
572 | { | |
573 | int node; | |
574 | ||
575 | /* only for L3, and not in virtualized environments */ | |
576 | if (index < 3) | |
577 | return; | |
578 | ||
579 | node = amd_get_nb_id(smp_processor_id()); | |
580 | this_leaf->nb = node_to_amd_nb(node); | |
581 | if (this_leaf->nb && !this_leaf->nb->l3_cache.indices) | |
582 | amd_calc_l3_indices(this_leaf->nb); | |
583 | } | |
f76e39c5 | 584 | #else |
f658bcfb | 585 | #define amd_init_l3_cache(x, y) |
f76e39c5 | 586 | #endif /* CONFIG_AMD_NB && CONFIG_SYSFS */ |
8cb22bcb | 587 | |
7a4983bb | 588 | static int |
148f9bb8 | 589 | cpuid4_cache_lookup_regs(int index, struct _cpuid4_info_regs *this_leaf) |
1da177e4 | 590 | { |
cabb5bd7 HR |
591 | union _cpuid4_leaf_eax eax; |
592 | union _cpuid4_leaf_ebx ebx; | |
593 | union _cpuid4_leaf_ecx ecx; | |
240cd6a8 | 594 | unsigned edx; |
1da177e4 | 595 | |
8cb22bcb | 596 | if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD) { |
362f924b | 597 | if (boot_cpu_has(X86_FEATURE_TOPOEXT)) |
2e8458df AH |
598 | cpuid_count(0x8000001d, index, &eax.full, |
599 | &ebx.full, &ecx.full, &edx); | |
600 | else | |
601 | amd_cpuid4(index, &eax, &ebx, &ecx); | |
f658bcfb | 602 | amd_init_l3_cache(this_leaf, index); |
7a4983bb IM |
603 | } else { |
604 | cpuid_count(4, index, &eax.full, &ebx.full, &ecx.full, &edx); | |
605 | } | |
606 | ||
0d55ba46 | 607 | if (eax.split.type == CTYPE_NULL) |
e2cac789 | 608 | return -EIO; /* better error ? */ |
1da177e4 | 609 | |
240cd6a8 AK |
610 | this_leaf->eax = eax; |
611 | this_leaf->ebx = ebx; | |
612 | this_leaf->ecx = ecx; | |
7a4983bb IM |
613 | this_leaf->size = (ecx.split.number_of_sets + 1) * |
614 | (ebx.split.coherency_line_size + 1) * | |
615 | (ebx.split.physical_line_partition + 1) * | |
616 | (ebx.split.ways_of_associativity + 1); | |
1da177e4 LT |
617 | return 0; |
618 | } | |
619 | ||
148f9bb8 | 620 | static int find_num_cache_leaves(struct cpuinfo_x86 *c) |
1da177e4 | 621 | { |
04a15418 | 622 | unsigned int eax, ebx, ecx, edx, op; |
1da177e4 | 623 | union _cpuid4_leaf_eax cache_eax; |
d16aafff | 624 | int i = -1; |
1da177e4 | 625 | |
04a15418 AH |
626 | if (c->x86_vendor == X86_VENDOR_AMD) |
627 | op = 0x8000001d; | |
628 | else | |
629 | op = 4; | |
630 | ||
d16aafff SS |
631 | do { |
632 | ++i; | |
04a15418 AH |
633 | /* Do cpuid(op) loop to find out num_cache_leaves */ |
634 | cpuid_count(op, i, &eax, &ebx, &ecx, &edx); | |
1da177e4 | 635 | cache_eax.full = eax; |
0d55ba46 | 636 | } while (cache_eax.split.type != CTYPE_NULL); |
d16aafff | 637 | return i; |
1da177e4 LT |
638 | } |
639 | ||
148f9bb8 | 640 | void init_amd_cacheinfo(struct cpuinfo_x86 *c) |
04a15418 AH |
641 | { |
642 | ||
362f924b | 643 | if (boot_cpu_has(X86_FEATURE_TOPOEXT)) { |
04a15418 AH |
644 | num_cache_leaves = find_num_cache_leaves(c); |
645 | } else if (c->extended_cpuid_level >= 0x80000006) { | |
646 | if (cpuid_edx(0x80000006) & 0xf000) | |
647 | num_cache_leaves = 4; | |
648 | else | |
649 | num_cache_leaves = 3; | |
650 | } | |
651 | } | |
652 | ||
148f9bb8 | 653 | unsigned int init_intel_cacheinfo(struct cpuinfo_x86 *c) |
1da177e4 | 654 | { |
8bdbd962 AC |
655 | /* Cache sizes */ |
656 | unsigned int trace = 0, l1i = 0, l1d = 0, l2 = 0, l3 = 0; | |
1da177e4 LT |
657 | unsigned int new_l1d = 0, new_l1i = 0; /* Cache sizes from cpuid(4) */ |
658 | unsigned int new_l2 = 0, new_l3 = 0, i; /* Cache sizes from cpuid(4) */ | |
1e9f28fa | 659 | unsigned int l2_id = 0, l3_id = 0, num_threads_sharing, index_msb; |
c8e56d20 | 660 | #ifdef CONFIG_SMP |
92cb7612 | 661 | unsigned int cpu = c->cpu_index; |
1e9f28fa | 662 | #endif |
1da177e4 | 663 | |
f2d0d263 | 664 | if (c->cpuid_level > 3) { |
1da177e4 LT |
665 | static int is_initialized; |
666 | ||
667 | if (is_initialized == 0) { | |
668 | /* Init num_cache_leaves from boot CPU */ | |
04a15418 | 669 | num_cache_leaves = find_num_cache_leaves(c); |
1da177e4 LT |
670 | is_initialized++; |
671 | } | |
672 | ||
673 | /* | |
674 | * Whenever possible use cpuid(4), deterministic cache | |
675 | * parameters cpuid leaf to find the cache details | |
676 | */ | |
677 | for (i = 0; i < num_cache_leaves; i++) { | |
719038de | 678 | struct _cpuid4_info_regs this_leaf = {}; |
1da177e4 LT |
679 | int retval; |
680 | ||
f9b90566 | 681 | retval = cpuid4_cache_lookup_regs(i, &this_leaf); |
719038de BP |
682 | if (retval < 0) |
683 | continue; | |
684 | ||
685 | switch (this_leaf.eax.split.level) { | |
686 | case 1: | |
0d55ba46 | 687 | if (this_leaf.eax.split.type == CTYPE_DATA) |
719038de | 688 | new_l1d = this_leaf.size/1024; |
0d55ba46 | 689 | else if (this_leaf.eax.split.type == CTYPE_INST) |
719038de BP |
690 | new_l1i = this_leaf.size/1024; |
691 | break; | |
692 | case 2: | |
693 | new_l2 = this_leaf.size/1024; | |
694 | num_threads_sharing = 1 + this_leaf.eax.split.num_threads_sharing; | |
695 | index_msb = get_count_order(num_threads_sharing); | |
696 | l2_id = c->apicid & ~((1 << index_msb) - 1); | |
697 | break; | |
698 | case 3: | |
699 | new_l3 = this_leaf.size/1024; | |
700 | num_threads_sharing = 1 + this_leaf.eax.split.num_threads_sharing; | |
701 | index_msb = get_count_order(num_threads_sharing); | |
702 | l3_id = c->apicid & ~((1 << index_msb) - 1); | |
703 | break; | |
704 | default: | |
705 | break; | |
1da177e4 LT |
706 | } |
707 | } | |
708 | } | |
b06be912 SL |
709 | /* |
710 | * Don't use cpuid2 if cpuid4 is supported. For P4, we use cpuid2 for | |
711 | * trace cache | |
712 | */ | |
713 | if ((num_cache_leaves == 0 || c->x86 == 15) && c->cpuid_level > 1) { | |
1da177e4 | 714 | /* supports eax=2 call */ |
c1666e66 HH |
715 | int j, n; |
716 | unsigned int regs[4]; | |
1da177e4 | 717 | unsigned char *dp = (unsigned char *)regs; |
b06be912 SL |
718 | int only_trace = 0; |
719 | ||
720 | if (num_cache_leaves != 0 && c->x86 == 15) | |
721 | only_trace = 1; | |
1da177e4 LT |
722 | |
723 | /* Number of times to iterate */ | |
724 | n = cpuid_eax(2) & 0xFF; | |
725 | ||
8bdbd962 | 726 | for (i = 0 ; i < n ; i++) { |
1da177e4 LT |
727 | cpuid(2, ®s[0], ®s[1], ®s[2], ®s[3]); |
728 | ||
729 | /* If bit 31 is set, this is an unknown format */ | |
8bdbd962 AC |
730 | for (j = 0 ; j < 3 ; j++) |
731 | if (regs[j] & (1 << 31)) | |
732 | regs[j] = 0; | |
1da177e4 LT |
733 | |
734 | /* Byte 0 is level count, not a descriptor */ | |
8bdbd962 | 735 | for (j = 1 ; j < 16 ; j++) { |
1da177e4 LT |
736 | unsigned char des = dp[j]; |
737 | unsigned char k = 0; | |
738 | ||
739 | /* look up this descriptor in the table */ | |
8bdbd962 | 740 | while (cache_table[k].descriptor != 0) { |
1da177e4 | 741 | if (cache_table[k].descriptor == des) { |
b06be912 SL |
742 | if (only_trace && cache_table[k].cache_type != LVL_TRACE) |
743 | break; | |
1da177e4 LT |
744 | switch (cache_table[k].cache_type) { |
745 | case LVL_1_INST: | |
746 | l1i += cache_table[k].size; | |
747 | break; | |
748 | case LVL_1_DATA: | |
749 | l1d += cache_table[k].size; | |
750 | break; | |
751 | case LVL_2: | |
752 | l2 += cache_table[k].size; | |
753 | break; | |
754 | case LVL_3: | |
755 | l3 += cache_table[k].size; | |
756 | break; | |
757 | case LVL_TRACE: | |
758 | trace += cache_table[k].size; | |
759 | break; | |
760 | } | |
761 | ||
762 | break; | |
763 | } | |
764 | ||
765 | k++; | |
766 | } | |
767 | } | |
768 | } | |
b06be912 | 769 | } |
1da177e4 | 770 | |
b06be912 SL |
771 | if (new_l1d) |
772 | l1d = new_l1d; | |
1da177e4 | 773 | |
b06be912 SL |
774 | if (new_l1i) |
775 | l1i = new_l1i; | |
1da177e4 | 776 | |
b06be912 SL |
777 | if (new_l2) { |
778 | l2 = new_l2; | |
c8e56d20 | 779 | #ifdef CONFIG_SMP |
b6278470 | 780 | per_cpu(cpu_llc_id, cpu) = l2_id; |
1e9f28fa | 781 | #endif |
b06be912 | 782 | } |
1da177e4 | 783 | |
b06be912 SL |
784 | if (new_l3) { |
785 | l3 = new_l3; | |
c8e56d20 | 786 | #ifdef CONFIG_SMP |
b6278470 | 787 | per_cpu(cpu_llc_id, cpu) = l3_id; |
1e9f28fa | 788 | #endif |
1da177e4 LT |
789 | } |
790 | ||
c8e56d20 | 791 | #ifdef CONFIG_SMP |
2a226155 PZ |
792 | /* |
793 | * If cpu_llc_id is not yet set, this means cpuid_level < 4 which in | |
794 | * turns means that the only possibility is SMT (as indicated in | |
795 | * cpuid1). Since cpuid2 doesn't specify shared caches, and we know | |
796 | * that SMT shares all caches, we can unconditionally set cpu_llc_id to | |
797 | * c->phys_proc_id. | |
798 | */ | |
799 | if (per_cpu(cpu_llc_id, cpu) == BAD_APICID) | |
800 | per_cpu(cpu_llc_id, cpu) = c->phys_proc_id; | |
801 | #endif | |
802 | ||
b06be912 SL |
803 | c->x86_cache_size = l3 ? l3 : (l2 ? l2 : (l1i+l1d)); |
804 | ||
1da177e4 LT |
805 | return l2; |
806 | } | |
807 | ||
0d55ba46 SH |
808 | static int __cache_amd_cpumap_setup(unsigned int cpu, int index, |
809 | struct _cpuid4_info_regs *base) | |
1da177e4 | 810 | { |
0d55ba46 SH |
811 | struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu); |
812 | struct cacheinfo *this_leaf; | |
27d3a8a2 | 813 | int i, sibling; |
1da177e4 | 814 | |
2b83809a SS |
815 | /* |
816 | * For L3, always use the pre-calculated cpu_llc_shared_mask | |
817 | * to derive shared_cpu_map. | |
818 | */ | |
819 | if (index == 3) { | |
820 | for_each_cpu(i, cpu_llc_shared_mask(cpu)) { | |
821 | this_cpu_ci = get_cpu_cacheinfo(i); | |
822 | if (!this_cpu_ci->info_list) | |
823 | continue; | |
824 | this_leaf = this_cpu_ci->info_list + index; | |
825 | for_each_cpu(sibling, cpu_llc_shared_mask(cpu)) { | |
826 | if (!cpu_online(sibling)) | |
827 | continue; | |
828 | cpumask_set_cpu(sibling, | |
829 | &this_leaf->shared_cpu_map); | |
830 | } | |
831 | } | |
832 | } else if (boot_cpu_has(X86_FEATURE_TOPOEXT)) { | |
27d3a8a2 AH |
833 | unsigned int apicid, nshared, first, last; |
834 | ||
0d55ba46 | 835 | nshared = base->eax.split.num_threads_sharing + 1; |
27d3a8a2 AH |
836 | apicid = cpu_data(cpu).apicid; |
837 | first = apicid - (apicid % nshared); | |
838 | last = first + nshared - 1; | |
839 | ||
840 | for_each_online_cpu(i) { | |
0d55ba46 SH |
841 | this_cpu_ci = get_cpu_cacheinfo(i); |
842 | if (!this_cpu_ci->info_list) | |
843 | continue; | |
844 | ||
27d3a8a2 AH |
845 | apicid = cpu_data(i).apicid; |
846 | if ((apicid < first) || (apicid > last)) | |
847 | continue; | |
0d55ba46 SH |
848 | |
849 | this_leaf = this_cpu_ci->info_list + index; | |
27d3a8a2 AH |
850 | |
851 | for_each_online_cpu(sibling) { | |
852 | apicid = cpu_data(sibling).apicid; | |
853 | if ((apicid < first) || (apicid > last)) | |
ebb682f5 | 854 | continue; |
0d55ba46 SH |
855 | cpumask_set_cpu(sibling, |
856 | &this_leaf->shared_cpu_map); | |
ebb682f5 | 857 | } |
a326e948 | 858 | } |
27d3a8a2 AH |
859 | } else |
860 | return 0; | |
32c32338 | 861 | |
27d3a8a2 | 862 | return 1; |
32c32338 AH |
863 | } |
864 | ||
0d55ba46 SH |
865 | static void __cache_cpumap_setup(unsigned int cpu, int index, |
866 | struct _cpuid4_info_regs *base) | |
32c32338 | 867 | { |
0d55ba46 SH |
868 | struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu); |
869 | struct cacheinfo *this_leaf, *sibling_leaf; | |
32c32338 AH |
870 | unsigned long num_threads_sharing; |
871 | int index_msb, i; | |
872 | struct cpuinfo_x86 *c = &cpu_data(cpu); | |
873 | ||
874 | if (c->x86_vendor == X86_VENDOR_AMD) { | |
0d55ba46 | 875 | if (__cache_amd_cpumap_setup(cpu, index, base)) |
32c32338 AH |
876 | return; |
877 | } | |
878 | ||
0d55ba46 SH |
879 | this_leaf = this_cpu_ci->info_list + index; |
880 | num_threads_sharing = 1 + base->eax.split.num_threads_sharing; | |
1da177e4 | 881 | |
0d55ba46 | 882 | cpumask_set_cpu(cpu, &this_leaf->shared_cpu_map); |
1da177e4 | 883 | if (num_threads_sharing == 1) |
0d55ba46 | 884 | return; |
e2cac789 | 885 | |
0d55ba46 | 886 | index_msb = get_count_order(num_threads_sharing); |
b7d11a76 | 887 | |
0d55ba46 SH |
888 | for_each_online_cpu(i) |
889 | if (cpu_data(i).apicid >> index_msb == c->apicid >> index_msb) { | |
890 | struct cpu_cacheinfo *sib_cpu_ci = get_cpu_cacheinfo(i); | |
ef1d7151 | 891 | |
0d55ba46 SH |
892 | if (i == cpu || !sib_cpu_ci->info_list) |
893 | continue;/* skip if itself or no cacheinfo */ | |
894 | sibling_leaf = sib_cpu_ci->info_list + index; | |
895 | cpumask_set_cpu(i, &this_leaf->shared_cpu_map); | |
896 | cpumask_set_cpu(cpu, &sibling_leaf->shared_cpu_map); | |
ef1d7151 | 897 | } |
b2bb8554 MT |
898 | } |
899 | ||
0d55ba46 SH |
900 | static void ci_leaf_init(struct cacheinfo *this_leaf, |
901 | struct _cpuid4_info_regs *base) | |
b2bb8554 | 902 | { |
d57e3ab7 FY |
903 | this_leaf->id = base->id; |
904 | this_leaf->attributes = CACHE_ID; | |
0d55ba46 SH |
905 | this_leaf->level = base->eax.split.level; |
906 | this_leaf->type = cache_type_map[base->eax.split.type]; | |
907 | this_leaf->coherency_line_size = | |
908 | base->ebx.split.coherency_line_size + 1; | |
909 | this_leaf->ways_of_associativity = | |
910 | base->ebx.split.ways_of_associativity + 1; | |
911 | this_leaf->size = base->size; | |
912 | this_leaf->number_of_sets = base->ecx.split.number_of_sets + 1; | |
913 | this_leaf->physical_line_partition = | |
914 | base->ebx.split.physical_line_partition + 1; | |
915 | this_leaf->priv = base->nb; | |
1da177e4 LT |
916 | } |
917 | ||
0d55ba46 | 918 | static int __init_cache_level(unsigned int cpu) |
fb0f330e | 919 | { |
0d55ba46 | 920 | struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu); |
fb0f330e | 921 | |
0d55ba46 | 922 | if (!num_cache_leaves) |
1da177e4 | 923 | return -ENOENT; |
0d55ba46 SH |
924 | if (!this_cpu_ci) |
925 | return -EINVAL; | |
926 | this_cpu_ci->num_levels = 3; | |
927 | this_cpu_ci->num_leaves = num_cache_leaves; | |
1da177e4 | 928 | return 0; |
1da177e4 LT |
929 | } |
930 | ||
d57e3ab7 FY |
931 | /* |
932 | * The max shared threads number comes from CPUID.4:EAX[25-14] with input | |
933 | * ECX as cache index. Then right shift apicid by the number's order to get | |
934 | * cache id for this cache node. | |
935 | */ | |
936 | static void get_cache_id(int cpu, struct _cpuid4_info_regs *id4_regs) | |
937 | { | |
938 | struct cpuinfo_x86 *c = &cpu_data(cpu); | |
939 | unsigned long num_threads_sharing; | |
940 | int index_msb; | |
941 | ||
942 | num_threads_sharing = 1 + id4_regs->eax.split.num_threads_sharing; | |
943 | index_msb = get_count_order(num_threads_sharing); | |
944 | id4_regs->id = c->apicid >> index_msb; | |
945 | } | |
946 | ||
0d55ba46 | 947 | static int __populate_cache_leaves(unsigned int cpu) |
1da177e4 | 948 | { |
0d55ba46 SH |
949 | unsigned int idx, ret; |
950 | struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu); | |
951 | struct cacheinfo *this_leaf = this_cpu_ci->info_list; | |
952 | struct _cpuid4_info_regs id4_regs = {}; | |
1da177e4 | 953 | |
0d55ba46 SH |
954 | for (idx = 0; idx < this_cpu_ci->num_leaves; idx++) { |
955 | ret = cpuid4_cache_lookup_regs(idx, &id4_regs); | |
956 | if (ret) | |
957 | return ret; | |
d57e3ab7 | 958 | get_cache_id(cpu, &id4_regs); |
0d55ba46 SH |
959 | ci_leaf_init(this_leaf++, &id4_regs); |
960 | __cache_cpumap_setup(cpu, idx, &id4_regs); | |
1da177e4 | 961 | } |
fac51482 SH |
962 | this_cpu_ci->cpu_map_populated = true; |
963 | ||
8b2b9c1a | 964 | return 0; |
1da177e4 LT |
965 | } |
966 | ||
0d55ba46 SH |
967 | DEFINE_SMP_CALL_CACHE_FUNCTION(init_cache_level) |
968 | DEFINE_SMP_CALL_CACHE_FUNCTION(populate_cache_leaves) |