Commit | Line | Data |
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1da177e4 LT |
1 | #include <linux/kernel.h> |
2 | ||
3 | #include <linux/string.h> | |
4 | #include <linux/bitops.h> | |
5 | #include <linux/smp.h> | |
83ce4009 | 6 | #include <linux/sched.h> |
1da177e4 | 7 | #include <linux/thread_info.h> |
53e86b91 | 8 | #include <linux/module.h> |
8bdbd962 | 9 | #include <linux/uaccess.h> |
1da177e4 LT |
10 | |
11 | #include <asm/processor.h> | |
d72b1b4f | 12 | #include <asm/pgtable.h> |
1da177e4 | 13 | #include <asm/msr.h> |
73bdb73f | 14 | #include <asm/bugs.h> |
1f442d70 | 15 | #include <asm/cpu.h> |
1da177e4 | 16 | |
185f3b9d | 17 | #ifdef CONFIG_X86_64 |
8bdbd962 | 18 | #include <linux/topology.h> |
185f3b9d YL |
19 | #endif |
20 | ||
1da177e4 LT |
21 | #include "cpu.h" |
22 | ||
23 | #ifdef CONFIG_X86_LOCAL_APIC | |
24 | #include <asm/mpspec.h> | |
25 | #include <asm/apic.h> | |
1da177e4 LT |
26 | #endif |
27 | ||
148f9bb8 | 28 | static void early_init_intel(struct cpuinfo_x86 *c) |
1da177e4 | 29 | { |
161ec53c FY |
30 | u64 misc_enable; |
31 | ||
99fb4d34 | 32 | /* Unmask CPUID levels if masked: */ |
30a0fb94 | 33 | if (c->x86 > 6 || (c->x86 == 6 && c->x86_model >= 0xd)) { |
0b131be8 PA |
34 | if (msr_clear_bit(MSR_IA32_MISC_ENABLE, |
35 | MSR_IA32_MISC_ENABLE_LIMIT_CPUID_BIT) > 0) { | |
99fb4d34 | 36 | c->cpuid_level = cpuid_eax(0); |
d900329e | 37 | get_cpu_cap(c); |
99fb4d34 | 38 | } |
066941bd PA |
39 | } |
40 | ||
2b16a235 AK |
41 | if ((c->x86 == 0xf && c->x86_model >= 0x03) || |
42 | (c->x86 == 0x6 && c->x86_model >= 0x0e)) | |
43 | set_cpu_cap(c, X86_FEATURE_CONSTANT_TSC); | |
185f3b9d | 44 | |
506ed6b5 AK |
45 | if (c->x86 >= 6 && !cpu_has(c, X86_FEATURE_IA64)) { |
46 | unsigned lower_word; | |
47 | ||
48 | wrmsr(MSR_IA32_UCODE_REV, 0, 0); | |
49 | /* Required by the SDM */ | |
50 | sync_core(); | |
51 | rdmsr(MSR_IA32_UCODE_REV, lower_word, c->microcode); | |
52 | } | |
53 | ||
7a0fc404 PA |
54 | /* |
55 | * Atom erratum AAE44/AAF40/AAG38/AAH41: | |
56 | * | |
57 | * A race condition between speculative fetches and invalidating | |
58 | * a large page. This is worked around in microcode, but we | |
59 | * need the microcode to have already been loaded... so if it is | |
60 | * not, recommend a BIOS update and disable large pages. | |
61 | */ | |
30963c0a AK |
62 | if (c->x86 == 6 && c->x86_model == 0x1c && c->x86_mask <= 2 && |
63 | c->microcode < 0x20e) { | |
64 | printk(KERN_WARNING "Atom PSE erratum detected, BIOS microcode update recommended\n"); | |
65 | clear_cpu_cap(c, X86_FEATURE_PSE); | |
7a0fc404 PA |
66 | } |
67 | ||
185f3b9d YL |
68 | #ifdef CONFIG_X86_64 |
69 | set_cpu_cap(c, X86_FEATURE_SYSENTER32); | |
70 | #else | |
71 | /* Netburst reports 64 bytes clflush size, but does IO in 128 bytes */ | |
72 | if (c->x86 == 15 && c->x86_cache_alignment == 64) | |
73 | c->x86_cache_alignment = 128; | |
74 | #endif | |
40fb1715 | 75 | |
13c6c532 JB |
76 | /* CPUID workaround for 0F33/0F34 CPU */ |
77 | if (c->x86 == 0xF && c->x86_model == 0x3 | |
78 | && (c->x86_mask == 0x3 || c->x86_mask == 0x4)) | |
79 | c->x86_phys_bits = 36; | |
80 | ||
40fb1715 VP |
81 | /* |
82 | * c->x86_power is 8000_0007 edx. Bit 8 is TSC runs at constant rate | |
83ce4009 IM |
83 | * with P/T states and does not stop in deep C-states. |
84 | * | |
85 | * It is also reliable across cores and sockets. (but not across | |
86 | * cabinets - we turn it off in that case explicitly.) | |
40fb1715 VP |
87 | */ |
88 | if (c->x86_power & (1 << 8)) { | |
89 | set_cpu_cap(c, X86_FEATURE_CONSTANT_TSC); | |
90 | set_cpu_cap(c, X86_FEATURE_NONSTOP_TSC); | |
14be1f74 | 91 | if (!check_tsc_unstable()) |
35af99e6 | 92 | set_sched_clock_stable(); |
40fb1715 VP |
93 | } |
94 | ||
c54fdbb2 FT |
95 | /* Penwell and Cloverview have the TSC which doesn't sleep on S3 */ |
96 | if (c->x86 == 6) { | |
97 | switch (c->x86_model) { | |
98 | case 0x27: /* Penwell */ | |
99 | case 0x35: /* Cloverview */ | |
100 | set_cpu_cap(c, X86_FEATURE_NONSTOP_TSC_S3); | |
101 | break; | |
102 | default: | |
103 | break; | |
104 | } | |
105 | } | |
106 | ||
75a04811 PA |
107 | /* |
108 | * There is a known erratum on Pentium III and Core Solo | |
109 | * and Core Duo CPUs. | |
110 | * " Page with PAT set to WC while associated MTRR is UC | |
111 | * may consolidate to UC " | |
112 | * Because of this erratum, it is better to stick with | |
113 | * setting WC in MTRR rather than using PAT on these CPUs. | |
114 | * | |
115 | * Enable PAT WC only on P4, Core 2 or later CPUs. | |
116 | */ | |
117 | if (c->x86 == 6 && c->x86_model < 15) | |
118 | clear_cpu_cap(c, X86_FEATURE_PAT); | |
f8561296 VN |
119 | |
120 | #ifdef CONFIG_KMEMCHECK | |
121 | /* | |
122 | * P4s have a "fast strings" feature which causes single- | |
123 | * stepping REP instructions to only generate a #DB on | |
124 | * cache-line boundaries. | |
125 | * | |
126 | * Ingo Molnar reported a Pentium D (model 6) and a Xeon | |
127 | * (model 2) with the same problem. | |
128 | */ | |
c0a639ad | 129 | if (c->x86 == 15) |
0b131be8 PA |
130 | if (msr_clear_bit(MSR_IA32_MISC_ENABLE, |
131 | MSR_IA32_MISC_ENABLE_FAST_STRING_BIT) > 0) | |
c0a639ad | 132 | pr_info("kmemcheck: Disabling fast string operations\n"); |
f8561296 | 133 | #endif |
161ec53c FY |
134 | |
135 | /* | |
136 | * If fast string is not enabled in IA32_MISC_ENABLE for any reason, | |
137 | * clear the fast string and enhanced fast string CPU capabilities. | |
138 | */ | |
139 | if (c->x86 > 6 || (c->x86 == 6 && c->x86_model >= 0xd)) { | |
140 | rdmsrl(MSR_IA32_MISC_ENABLE, misc_enable); | |
141 | if (!(misc_enable & MSR_IA32_MISC_ENABLE_FAST_STRING)) { | |
142 | printk(KERN_INFO "Disabled fast string operations\n"); | |
143 | setup_clear_cpu_cap(X86_FEATURE_REP_GOOD); | |
144 | setup_clear_cpu_cap(X86_FEATURE_ERMS); | |
145 | } | |
146 | } | |
1da177e4 LT |
147 | } |
148 | ||
185f3b9d | 149 | #ifdef CONFIG_X86_32 |
1da177e4 LT |
150 | /* |
151 | * Early probe support logic for ppro memory erratum #50 | |
152 | * | |
153 | * This is called before we do cpu ident work | |
154 | */ | |
65eb6b43 | 155 | |
148f9bb8 | 156 | int ppro_with_ram_bug(void) |
1da177e4 LT |
157 | { |
158 | /* Uses data from early_cpu_detect now */ | |
159 | if (boot_cpu_data.x86_vendor == X86_VENDOR_INTEL && | |
160 | boot_cpu_data.x86 == 6 && | |
161 | boot_cpu_data.x86_model == 1 && | |
162 | boot_cpu_data.x86_mask < 8) { | |
163 | printk(KERN_INFO "Pentium Pro with Errata#50 detected. Taking evasive action.\n"); | |
164 | return 1; | |
165 | } | |
166 | return 0; | |
167 | } | |
65eb6b43 | 168 | |
148f9bb8 | 169 | static void intel_smp_check(struct cpuinfo_x86 *c) |
1f442d70 | 170 | { |
1f442d70 | 171 | /* calling is from identify_secondary_cpu() ? */ |
f6e9456c | 172 | if (!c->cpu_index) |
1f442d70 YL |
173 | return; |
174 | ||
175 | /* | |
176 | * Mask B, Pentium, but not Pentium MMX | |
177 | */ | |
178 | if (c->x86 == 5 && | |
179 | c->x86_mask >= 1 && c->x86_mask <= 4 && | |
180 | c->x86_model <= 3) { | |
181 | /* | |
182 | * Remember we have B step Pentia with bugs | |
183 | */ | |
184 | WARN_ONCE(1, "WARNING: SMP operation may be unreliable" | |
185 | "with B stepping processors.\n"); | |
186 | } | |
1f442d70 YL |
187 | } |
188 | ||
69f2366c CB |
189 | static int forcepae; |
190 | static int __init forcepae_setup(char *__unused) | |
191 | { | |
192 | forcepae = 1; | |
193 | return 1; | |
194 | } | |
195 | __setup("forcepae", forcepae_setup); | |
196 | ||
148f9bb8 | 197 | static void intel_workarounds(struct cpuinfo_x86 *c) |
1da177e4 | 198 | { |
4052704d YL |
199 | #ifdef CONFIG_X86_F00F_BUG |
200 | /* | |
201 | * All current models of Pentium and Pentium with MMX technology CPUs | |
8bdbd962 | 202 | * have the F0 0F bug, which lets nonprivileged users lock up the |
4eefbe79 | 203 | * system. Announce that the fault handler will be checking for it. |
4052704d | 204 | */ |
e2604b49 | 205 | clear_cpu_bug(c, X86_BUG_F00F); |
4052704d YL |
206 | if (!paravirt_enabled() && c->x86 == 5) { |
207 | static int f00f_workaround_enabled; | |
208 | ||
e2604b49 | 209 | set_cpu_bug(c, X86_BUG_F00F); |
4052704d | 210 | if (!f00f_workaround_enabled) { |
4052704d YL |
211 | printk(KERN_NOTICE "Intel Pentium with F0 0F bug - workaround enabled.\n"); |
212 | f00f_workaround_enabled = 1; | |
213 | } | |
214 | } | |
215 | #endif | |
216 | ||
217 | /* | |
218 | * SEP CPUID bug: Pentium Pro reports SEP but doesn't have it until | |
219 | * model 3 mask 3 | |
220 | */ | |
221 | if ((c->x86<<8 | c->x86_model<<4 | c->x86_mask) < 0x633) | |
222 | clear_cpu_cap(c, X86_FEATURE_SEP); | |
223 | ||
69f2366c CB |
224 | /* |
225 | * PAE CPUID issue: many Pentium M report no PAE but may have a | |
226 | * functionally usable PAE implementation. | |
227 | * Forcefully enable PAE if kernel parameter "forcepae" is present. | |
228 | */ | |
229 | if (forcepae) { | |
230 | printk(KERN_WARNING "PAE forced!\n"); | |
231 | set_cpu_cap(c, X86_FEATURE_PAE); | |
232 | add_taint(TAINT_CPU_OUT_OF_SPEC, LOCKDEP_NOW_UNRELIABLE); | |
233 | } | |
234 | ||
4052704d YL |
235 | /* |
236 | * P4 Xeon errata 037 workaround. | |
237 | * Hardware prefetcher may cause stale data to be loaded into the cache. | |
238 | */ | |
1da177e4 | 239 | if ((c->x86 == 15) && (c->x86_model == 1) && (c->x86_mask == 1)) { |
0b131be8 PA |
240 | if (msr_set_bit(MSR_IA32_MISC_ENABLE, |
241 | MSR_IA32_MISC_ENABLE_PREFETCH_DISABLE_BIT) | |
242 | > 0) { | |
c0a639ad BP |
243 | pr_info("CPU: C0 stepping P4 Xeon detected.\n"); |
244 | pr_info("CPU: Disabling hardware prefetching (Errata 037)\n"); | |
1da177e4 LT |
245 | } |
246 | } | |
1da177e4 | 247 | |
4052704d YL |
248 | /* |
249 | * See if we have a good local APIC by checking for buggy Pentia, | |
250 | * i.e. all B steppings and the C2 stepping of P54C when using their | |
251 | * integrated APIC (see 11AP erratum in "Pentium Processor | |
252 | * Specification Update"). | |
253 | */ | |
254 | if (cpu_has_apic && (c->x86<<8 | c->x86_model<<4) == 0x520 && | |
255 | (c->x86_mask < 0x6 || c->x86_mask == 0xb)) | |
9b13a93d | 256 | set_cpu_bug(c, X86_BUG_11AP); |
185f3b9d | 257 | |
185f3b9d | 258 | |
4052704d | 259 | #ifdef CONFIG_X86_INTEL_USERCOPY |
185f3b9d | 260 | /* |
4052704d | 261 | * Set up the preferred alignment for movsl bulk memory moves |
185f3b9d | 262 | */ |
4052704d YL |
263 | switch (c->x86) { |
264 | case 4: /* 486: untested */ | |
265 | break; | |
266 | case 5: /* Old Pentia: untested */ | |
267 | break; | |
268 | case 6: /* PII/PIII only like movsl with 8-byte alignment */ | |
269 | movsl_mask.mask = 7; | |
270 | break; | |
271 | case 15: /* P4 is OK down to 8-byte alignment */ | |
272 | movsl_mask.mask = 7; | |
273 | break; | |
274 | } | |
185f3b9d | 275 | #endif |
4052704d | 276 | |
1f442d70 | 277 | intel_smp_check(c); |
4052704d YL |
278 | } |
279 | #else | |
148f9bb8 | 280 | static void intel_workarounds(struct cpuinfo_x86 *c) |
4052704d YL |
281 | { |
282 | } | |
185f3b9d YL |
283 | #endif |
284 | ||
148f9bb8 | 285 | static void srat_detect_node(struct cpuinfo_x86 *c) |
185f3b9d | 286 | { |
645a7919 | 287 | #ifdef CONFIG_NUMA |
185f3b9d YL |
288 | unsigned node; |
289 | int cpu = smp_processor_id(); | |
185f3b9d YL |
290 | |
291 | /* Don't do the funky fallback heuristics the AMD version employs | |
292 | for now. */ | |
bbc9e2f4 | 293 | node = numa_cpu_node(cpu); |
50f2d7f6 | 294 | if (node == NUMA_NO_NODE || !node_online(node)) { |
d9c2d5ac YL |
295 | /* reuse the value from init_cpu_to_node() */ |
296 | node = cpu_to_node(cpu); | |
297 | } | |
185f3b9d | 298 | numa_set_node(cpu, node); |
185f3b9d YL |
299 | #endif |
300 | } | |
301 | ||
3dd9d514 AK |
302 | /* |
303 | * find out the number of processor cores on the die | |
304 | */ | |
148f9bb8 | 305 | static int intel_num_cpu_cores(struct cpuinfo_x86 *c) |
3dd9d514 | 306 | { |
f2ab4461 | 307 | unsigned int eax, ebx, ecx, edx; |
3dd9d514 AK |
308 | |
309 | if (c->cpuid_level < 4) | |
310 | return 1; | |
311 | ||
f2ab4461 ZA |
312 | /* Intel has a non-standard dependency on %ecx for this CPUID level. */ |
313 | cpuid_count(4, 0, &eax, &ebx, &ecx, &edx); | |
3dd9d514 | 314 | if (eax & 0x1f) |
8bdbd962 | 315 | return (eax >> 26) + 1; |
3dd9d514 AK |
316 | else |
317 | return 1; | |
318 | } | |
319 | ||
148f9bb8 | 320 | static void detect_vmx_virtcap(struct cpuinfo_x86 *c) |
e38e05a8 SY |
321 | { |
322 | /* Intel VMX MSR indicated features */ | |
323 | #define X86_VMX_FEATURE_PROC_CTLS_TPR_SHADOW 0x00200000 | |
324 | #define X86_VMX_FEATURE_PROC_CTLS_VNMI 0x00400000 | |
325 | #define X86_VMX_FEATURE_PROC_CTLS_2ND_CTLS 0x80000000 | |
326 | #define X86_VMX_FEATURE_PROC_CTLS2_VIRT_APIC 0x00000001 | |
327 | #define X86_VMX_FEATURE_PROC_CTLS2_EPT 0x00000002 | |
328 | #define X86_VMX_FEATURE_PROC_CTLS2_VPID 0x00000020 | |
329 | ||
330 | u32 vmx_msr_low, vmx_msr_high, msr_ctl, msr_ctl2; | |
331 | ||
332 | clear_cpu_cap(c, X86_FEATURE_TPR_SHADOW); | |
333 | clear_cpu_cap(c, X86_FEATURE_VNMI); | |
334 | clear_cpu_cap(c, X86_FEATURE_FLEXPRIORITY); | |
335 | clear_cpu_cap(c, X86_FEATURE_EPT); | |
336 | clear_cpu_cap(c, X86_FEATURE_VPID); | |
337 | ||
338 | rdmsr(MSR_IA32_VMX_PROCBASED_CTLS, vmx_msr_low, vmx_msr_high); | |
339 | msr_ctl = vmx_msr_high | vmx_msr_low; | |
340 | if (msr_ctl & X86_VMX_FEATURE_PROC_CTLS_TPR_SHADOW) | |
341 | set_cpu_cap(c, X86_FEATURE_TPR_SHADOW); | |
342 | if (msr_ctl & X86_VMX_FEATURE_PROC_CTLS_VNMI) | |
343 | set_cpu_cap(c, X86_FEATURE_VNMI); | |
344 | if (msr_ctl & X86_VMX_FEATURE_PROC_CTLS_2ND_CTLS) { | |
345 | rdmsr(MSR_IA32_VMX_PROCBASED_CTLS2, | |
346 | vmx_msr_low, vmx_msr_high); | |
347 | msr_ctl2 = vmx_msr_high | vmx_msr_low; | |
348 | if ((msr_ctl2 & X86_VMX_FEATURE_PROC_CTLS2_VIRT_APIC) && | |
349 | (msr_ctl & X86_VMX_FEATURE_PROC_CTLS_TPR_SHADOW)) | |
350 | set_cpu_cap(c, X86_FEATURE_FLEXPRIORITY); | |
351 | if (msr_ctl2 & X86_VMX_FEATURE_PROC_CTLS2_EPT) | |
352 | set_cpu_cap(c, X86_FEATURE_EPT); | |
353 | if (msr_ctl2 & X86_VMX_FEATURE_PROC_CTLS2_VPID) | |
354 | set_cpu_cap(c, X86_FEATURE_VPID); | |
355 | } | |
356 | } | |
357 | ||
148f9bb8 | 358 | static void init_intel(struct cpuinfo_x86 *c) |
1da177e4 LT |
359 | { |
360 | unsigned int l2 = 0; | |
1da177e4 | 361 | |
2b16a235 AK |
362 | early_init_intel(c); |
363 | ||
4052704d | 364 | intel_workarounds(c); |
1da177e4 | 365 | |
345077cd SS |
366 | /* |
367 | * Detect the extended topology information if available. This | |
368 | * will reinitialise the initial_apicid which will be used | |
369 | * in init_intel_cacheinfo() | |
370 | */ | |
371 | detect_extended_topology(c); | |
372 | ||
2a226155 PZ |
373 | if (!cpu_has(c, X86_FEATURE_XTOPOLOGY)) { |
374 | /* | |
375 | * let's use the legacy cpuid vector 0x1 and 0x4 for topology | |
376 | * detection. | |
377 | */ | |
378 | c->x86_max_cores = intel_num_cpu_cores(c); | |
379 | #ifdef CONFIG_X86_32 | |
380 | detect_ht(c); | |
381 | #endif | |
382 | } | |
383 | ||
1da177e4 | 384 | l2 = init_intel_cacheinfo(c); |
65eb6b43 | 385 | if (c->cpuid_level > 9) { |
0080e667 VP |
386 | unsigned eax = cpuid_eax(10); |
387 | /* Check for version and the number of counters */ | |
388 | if ((eax & 0xff) && (((eax>>8) & 0xff) > 1)) | |
d0e95ebd | 389 | set_cpu_cap(c, X86_FEATURE_ARCH_PERFMON); |
0080e667 | 390 | } |
1da177e4 | 391 | |
4052704d YL |
392 | if (cpu_has_xmm2) |
393 | set_cpu_cap(c, X86_FEATURE_LFENCE_RDTSC); | |
394 | if (cpu_has_ds) { | |
395 | unsigned int l1; | |
396 | rdmsr(MSR_IA32_MISC_ENABLE, l1, l2); | |
397 | if (!(l1 & (1<<11))) | |
398 | set_cpu_cap(c, X86_FEATURE_BTS); | |
399 | if (!(l1 & (1<<12))) | |
400 | set_cpu_cap(c, X86_FEATURE_PEBS); | |
4052704d | 401 | } |
1da177e4 | 402 | |
40e2d7f9 LB |
403 | if (c->x86 == 6 && cpu_has_clflush && |
404 | (c->x86_model == 29 || c->x86_model == 46 || c->x86_model == 47)) | |
9b13a93d | 405 | set_cpu_bug(c, X86_BUG_CLFLUSH_MONITOR); |
e736ad54 | 406 | |
4052704d YL |
407 | #ifdef CONFIG_X86_64 |
408 | if (c->x86 == 15) | |
409 | c->x86_cache_alignment = c->x86_clflush_size * 2; | |
410 | if (c->x86 == 6) | |
411 | set_cpu_cap(c, X86_FEATURE_REP_GOOD); | |
412 | #else | |
65eb6b43 PC |
413 | /* |
414 | * Names for the Pentium II/Celeron processors | |
415 | * detectable only by also checking the cache size. | |
416 | * Dixon is NOT a Celeron. | |
417 | */ | |
1da177e4 | 418 | if (c->x86 == 6) { |
4052704d YL |
419 | char *p = NULL; |
420 | ||
1da177e4 LT |
421 | switch (c->x86_model) { |
422 | case 5: | |
865be7a8 OZ |
423 | if (l2 == 0) |
424 | p = "Celeron (Covington)"; | |
425 | else if (l2 == 256) | |
426 | p = "Mobile Pentium II (Dixon)"; | |
1da177e4 | 427 | break; |
65eb6b43 | 428 | |
1da177e4 LT |
429 | case 6: |
430 | if (l2 == 128) | |
431 | p = "Celeron (Mendocino)"; | |
432 | else if (c->x86_mask == 0 || c->x86_mask == 5) | |
433 | p = "Celeron-A"; | |
434 | break; | |
65eb6b43 | 435 | |
1da177e4 LT |
436 | case 8: |
437 | if (l2 == 128) | |
438 | p = "Celeron (Coppermine)"; | |
439 | break; | |
440 | } | |
1da177e4 | 441 | |
4052704d YL |
442 | if (p) |
443 | strcpy(c->x86_model_id, p); | |
1da177e4 | 444 | } |
1da177e4 | 445 | |
185f3b9d YL |
446 | if (c->x86 == 15) |
447 | set_cpu_cap(c, X86_FEATURE_P4); | |
448 | if (c->x86 == 6) | |
449 | set_cpu_cap(c, X86_FEATURE_P3); | |
f4166c54 | 450 | #endif |
185f3b9d | 451 | |
185f3b9d | 452 | /* Work around errata */ |
2759c328 | 453 | srat_detect_node(c); |
e38e05a8 SY |
454 | |
455 | if (cpu_has(c, X86_FEATURE_VMX)) | |
456 | detect_vmx_virtcap(c); | |
abe48b10 LB |
457 | |
458 | /* | |
459 | * Initialize MSR_IA32_ENERGY_PERF_BIAS if BIOS did not. | |
460 | * x86_energy_perf_policy(8) is available to change it at run-time | |
461 | */ | |
462 | if (cpu_has(c, X86_FEATURE_EPB)) { | |
463 | u64 epb; | |
464 | ||
465 | rdmsrl(MSR_IA32_ENERGY_PERF_BIAS, epb); | |
17edf2d7 LB |
466 | if ((epb & 0xF) == ENERGY_PERF_BIAS_PERFORMANCE) { |
467 | printk_once(KERN_WARNING "ENERGY_PERF_BIAS:" | |
468 | " Set to 'normal', was 'performance'\n" | |
469 | "ENERGY_PERF_BIAS: View and update with" | |
470 | " x86_energy_perf_policy(8)\n"); | |
abe48b10 LB |
471 | epb = (epb & ~0xF) | ENERGY_PERF_BIAS_NORMAL; |
472 | wrmsrl(MSR_IA32_ENERGY_PERF_BIAS, epb); | |
473 | } | |
474 | } | |
42ed458a | 475 | } |
1da177e4 | 476 | |
185f3b9d | 477 | #ifdef CONFIG_X86_32 |
148f9bb8 | 478 | static unsigned int intel_size_cache(struct cpuinfo_x86 *c, unsigned int size) |
1da177e4 | 479 | { |
65eb6b43 PC |
480 | /* |
481 | * Intel PIII Tualatin. This comes in two flavours. | |
1da177e4 LT |
482 | * One has 256kb of cache, the other 512. We have no way |
483 | * to determine which, so we use a boottime override | |
484 | * for the 512kb model, and assume 256 otherwise. | |
485 | */ | |
486 | if ((c->x86 == 6) && (c->x86_model == 11) && (size == 0)) | |
487 | size = 256; | |
488 | return size; | |
489 | } | |
185f3b9d | 490 | #endif |
1da177e4 | 491 | |
e0ba94f1 AS |
492 | #define TLB_INST_4K 0x01 |
493 | #define TLB_INST_4M 0x02 | |
494 | #define TLB_INST_2M_4M 0x03 | |
495 | ||
496 | #define TLB_INST_ALL 0x05 | |
497 | #define TLB_INST_1G 0x06 | |
498 | ||
499 | #define TLB_DATA_4K 0x11 | |
500 | #define TLB_DATA_4M 0x12 | |
501 | #define TLB_DATA_2M_4M 0x13 | |
502 | #define TLB_DATA_4K_4M 0x14 | |
503 | ||
504 | #define TLB_DATA_1G 0x16 | |
505 | ||
506 | #define TLB_DATA0_4K 0x21 | |
507 | #define TLB_DATA0_4M 0x22 | |
508 | #define TLB_DATA0_2M_4M 0x23 | |
509 | ||
510 | #define STLB_4K 0x41 | |
dd360393 | 511 | #define STLB_4K_2M 0x42 |
e0ba94f1 | 512 | |
148f9bb8 | 513 | static const struct _tlb_table intel_tlb_table[] = { |
e0ba94f1 AS |
514 | { 0x01, TLB_INST_4K, 32, " TLB_INST 4 KByte pages, 4-way set associative" }, |
515 | { 0x02, TLB_INST_4M, 2, " TLB_INST 4 MByte pages, full associative" }, | |
516 | { 0x03, TLB_DATA_4K, 64, " TLB_DATA 4 KByte pages, 4-way set associative" }, | |
517 | { 0x04, TLB_DATA_4M, 8, " TLB_DATA 4 MByte pages, 4-way set associative" }, | |
518 | { 0x05, TLB_DATA_4M, 32, " TLB_DATA 4 MByte pages, 4-way set associative" }, | |
519 | { 0x0b, TLB_INST_4M, 4, " TLB_INST 4 MByte pages, 4-way set associative" }, | |
520 | { 0x4f, TLB_INST_4K, 32, " TLB_INST 4 KByte pages */" }, | |
521 | { 0x50, TLB_INST_ALL, 64, " TLB_INST 4 KByte and 2-MByte or 4-MByte pages" }, | |
522 | { 0x51, TLB_INST_ALL, 128, " TLB_INST 4 KByte and 2-MByte or 4-MByte pages" }, | |
523 | { 0x52, TLB_INST_ALL, 256, " TLB_INST 4 KByte and 2-MByte or 4-MByte pages" }, | |
524 | { 0x55, TLB_INST_2M_4M, 7, " TLB_INST 2-MByte or 4-MByte pages, fully associative" }, | |
525 | { 0x56, TLB_DATA0_4M, 16, " TLB_DATA0 4 MByte pages, 4-way set associative" }, | |
526 | { 0x57, TLB_DATA0_4K, 16, " TLB_DATA0 4 KByte pages, 4-way associative" }, | |
527 | { 0x59, TLB_DATA0_4K, 16, " TLB_DATA0 4 KByte pages, fully associative" }, | |
528 | { 0x5a, TLB_DATA0_2M_4M, 32, " TLB_DATA0 2-MByte or 4 MByte pages, 4-way set associative" }, | |
529 | { 0x5b, TLB_DATA_4K_4M, 64, " TLB_DATA 4 KByte and 4 MByte pages" }, | |
530 | { 0x5c, TLB_DATA_4K_4M, 128, " TLB_DATA 4 KByte and 4 MByte pages" }, | |
531 | { 0x5d, TLB_DATA_4K_4M, 256, " TLB_DATA 4 KByte and 4 MByte pages" }, | |
dd360393 KS |
532 | { 0x61, TLB_INST_4K, 48, " TLB_INST 4 KByte pages, full associative" }, |
533 | { 0x63, TLB_DATA_1G, 4, " TLB_DATA 1 GByte pages, 4-way set associative" }, | |
534 | { 0x76, TLB_INST_2M_4M, 8, " TLB_INST 2-MByte or 4-MByte pages, fully associative" }, | |
e0ba94f1 AS |
535 | { 0xb0, TLB_INST_4K, 128, " TLB_INST 4 KByte pages, 4-way set associative" }, |
536 | { 0xb1, TLB_INST_2M_4M, 4, " TLB_INST 2M pages, 4-way, 8 entries or 4M pages, 4-way entries" }, | |
537 | { 0xb2, TLB_INST_4K, 64, " TLB_INST 4KByte pages, 4-way set associative" }, | |
538 | { 0xb3, TLB_DATA_4K, 128, " TLB_DATA 4 KByte pages, 4-way set associative" }, | |
539 | { 0xb4, TLB_DATA_4K, 256, " TLB_DATA 4 KByte pages, 4-way associative" }, | |
dd360393 KS |
540 | { 0xb5, TLB_INST_4K, 64, " TLB_INST 4 KByte pages, 8-way set ssociative" }, |
541 | { 0xb6, TLB_INST_4K, 128, " TLB_INST 4 KByte pages, 8-way set ssociative" }, | |
e0ba94f1 AS |
542 | { 0xba, TLB_DATA_4K, 64, " TLB_DATA 4 KByte pages, 4-way associative" }, |
543 | { 0xc0, TLB_DATA_4K_4M, 8, " TLB_DATA 4 KByte and 4 MByte pages, 4-way associative" }, | |
dd360393 KS |
544 | { 0xc1, STLB_4K_2M, 1024, " STLB 4 KByte and 2 MByte pages, 8-way associative" }, |
545 | { 0xc2, TLB_DATA_2M_4M, 16, " DTLB 2 MByte/4MByte pages, 4-way associative" }, | |
e0ba94f1 AS |
546 | { 0xca, STLB_4K, 512, " STLB 4 KByte pages, 4-way associative" }, |
547 | { 0x00, 0, 0 } | |
548 | }; | |
549 | ||
148f9bb8 | 550 | static void intel_tlb_lookup(const unsigned char desc) |
e0ba94f1 AS |
551 | { |
552 | unsigned char k; | |
553 | if (desc == 0) | |
554 | return; | |
555 | ||
556 | /* look up this descriptor in the table */ | |
557 | for (k = 0; intel_tlb_table[k].descriptor != desc && \ | |
558 | intel_tlb_table[k].descriptor != 0; k++) | |
559 | ; | |
560 | ||
561 | if (intel_tlb_table[k].tlb_type == 0) | |
562 | return; | |
563 | ||
564 | switch (intel_tlb_table[k].tlb_type) { | |
565 | case STLB_4K: | |
566 | if (tlb_lli_4k[ENTRIES] < intel_tlb_table[k].entries) | |
567 | tlb_lli_4k[ENTRIES] = intel_tlb_table[k].entries; | |
568 | if (tlb_lld_4k[ENTRIES] < intel_tlb_table[k].entries) | |
569 | tlb_lld_4k[ENTRIES] = intel_tlb_table[k].entries; | |
570 | break; | |
dd360393 KS |
571 | case STLB_4K_2M: |
572 | if (tlb_lli_4k[ENTRIES] < intel_tlb_table[k].entries) | |
573 | tlb_lli_4k[ENTRIES] = intel_tlb_table[k].entries; | |
574 | if (tlb_lld_4k[ENTRIES] < intel_tlb_table[k].entries) | |
575 | tlb_lld_4k[ENTRIES] = intel_tlb_table[k].entries; | |
576 | if (tlb_lli_2m[ENTRIES] < intel_tlb_table[k].entries) | |
577 | tlb_lli_2m[ENTRIES] = intel_tlb_table[k].entries; | |
578 | if (tlb_lld_2m[ENTRIES] < intel_tlb_table[k].entries) | |
579 | tlb_lld_2m[ENTRIES] = intel_tlb_table[k].entries; | |
580 | if (tlb_lli_4m[ENTRIES] < intel_tlb_table[k].entries) | |
581 | tlb_lli_4m[ENTRIES] = intel_tlb_table[k].entries; | |
582 | if (tlb_lld_4m[ENTRIES] < intel_tlb_table[k].entries) | |
583 | tlb_lld_4m[ENTRIES] = intel_tlb_table[k].entries; | |
584 | break; | |
e0ba94f1 AS |
585 | case TLB_INST_ALL: |
586 | if (tlb_lli_4k[ENTRIES] < intel_tlb_table[k].entries) | |
587 | tlb_lli_4k[ENTRIES] = intel_tlb_table[k].entries; | |
588 | if (tlb_lli_2m[ENTRIES] < intel_tlb_table[k].entries) | |
589 | tlb_lli_2m[ENTRIES] = intel_tlb_table[k].entries; | |
590 | if (tlb_lli_4m[ENTRIES] < intel_tlb_table[k].entries) | |
591 | tlb_lli_4m[ENTRIES] = intel_tlb_table[k].entries; | |
592 | break; | |
593 | case TLB_INST_4K: | |
594 | if (tlb_lli_4k[ENTRIES] < intel_tlb_table[k].entries) | |
595 | tlb_lli_4k[ENTRIES] = intel_tlb_table[k].entries; | |
596 | break; | |
597 | case TLB_INST_4M: | |
598 | if (tlb_lli_4m[ENTRIES] < intel_tlb_table[k].entries) | |
599 | tlb_lli_4m[ENTRIES] = intel_tlb_table[k].entries; | |
600 | break; | |
601 | case TLB_INST_2M_4M: | |
602 | if (tlb_lli_2m[ENTRIES] < intel_tlb_table[k].entries) | |
603 | tlb_lli_2m[ENTRIES] = intel_tlb_table[k].entries; | |
604 | if (tlb_lli_4m[ENTRIES] < intel_tlb_table[k].entries) | |
605 | tlb_lli_4m[ENTRIES] = intel_tlb_table[k].entries; | |
606 | break; | |
607 | case TLB_DATA_4K: | |
608 | case TLB_DATA0_4K: | |
609 | if (tlb_lld_4k[ENTRIES] < intel_tlb_table[k].entries) | |
610 | tlb_lld_4k[ENTRIES] = intel_tlb_table[k].entries; | |
611 | break; | |
612 | case TLB_DATA_4M: | |
613 | case TLB_DATA0_4M: | |
614 | if (tlb_lld_4m[ENTRIES] < intel_tlb_table[k].entries) | |
615 | tlb_lld_4m[ENTRIES] = intel_tlb_table[k].entries; | |
616 | break; | |
617 | case TLB_DATA_2M_4M: | |
618 | case TLB_DATA0_2M_4M: | |
619 | if (tlb_lld_2m[ENTRIES] < intel_tlb_table[k].entries) | |
620 | tlb_lld_2m[ENTRIES] = intel_tlb_table[k].entries; | |
621 | if (tlb_lld_4m[ENTRIES] < intel_tlb_table[k].entries) | |
622 | tlb_lld_4m[ENTRIES] = intel_tlb_table[k].entries; | |
623 | break; | |
624 | case TLB_DATA_4K_4M: | |
625 | if (tlb_lld_4k[ENTRIES] < intel_tlb_table[k].entries) | |
626 | tlb_lld_4k[ENTRIES] = intel_tlb_table[k].entries; | |
627 | if (tlb_lld_4m[ENTRIES] < intel_tlb_table[k].entries) | |
628 | tlb_lld_4m[ENTRIES] = intel_tlb_table[k].entries; | |
629 | break; | |
dd360393 KS |
630 | case TLB_DATA_1G: |
631 | if (tlb_lld_1g[ENTRIES] < intel_tlb_table[k].entries) | |
632 | tlb_lld_1g[ENTRIES] = intel_tlb_table[k].entries; | |
e0ba94f1 AS |
633 | break; |
634 | } | |
635 | } | |
636 | ||
148f9bb8 | 637 | static void intel_detect_tlb(struct cpuinfo_x86 *c) |
e0ba94f1 AS |
638 | { |
639 | int i, j, n; | |
640 | unsigned int regs[4]; | |
641 | unsigned char *desc = (unsigned char *)regs; | |
5b556332 BP |
642 | |
643 | if (c->cpuid_level < 2) | |
644 | return; | |
645 | ||
e0ba94f1 AS |
646 | /* Number of times to iterate */ |
647 | n = cpuid_eax(2) & 0xFF; | |
648 | ||
649 | for (i = 0 ; i < n ; i++) { | |
650 | cpuid(2, ®s[0], ®s[1], ®s[2], ®s[3]); | |
651 | ||
652 | /* If bit 31 is set, this is an unknown format */ | |
653 | for (j = 0 ; j < 3 ; j++) | |
654 | if (regs[j] & (1 << 31)) | |
655 | regs[j] = 0; | |
656 | ||
657 | /* Byte 0 is level count, not a descriptor */ | |
658 | for (j = 1 ; j < 16 ; j++) | |
659 | intel_tlb_lookup(desc[j]); | |
660 | } | |
661 | } | |
662 | ||
148f9bb8 | 663 | static const struct cpu_dev intel_cpu_dev = { |
1da177e4 | 664 | .c_vendor = "Intel", |
65eb6b43 | 665 | .c_ident = { "GenuineIntel" }, |
185f3b9d | 666 | #ifdef CONFIG_X86_32 |
09dc68d9 JB |
667 | .legacy_models = { |
668 | { .family = 4, .model_names = | |
65eb6b43 PC |
669 | { |
670 | [0] = "486 DX-25/33", | |
671 | [1] = "486 DX-50", | |
672 | [2] = "486 SX", | |
673 | [3] = "486 DX/2", | |
674 | [4] = "486 SL", | |
675 | [5] = "486 SX/2", | |
676 | [7] = "486 DX/2-WB", | |
677 | [8] = "486 DX/4", | |
1da177e4 LT |
678 | [9] = "486 DX/4-WB" |
679 | } | |
680 | }, | |
09dc68d9 | 681 | { .family = 5, .model_names = |
65eb6b43 PC |
682 | { |
683 | [0] = "Pentium 60/66 A-step", | |
684 | [1] = "Pentium 60/66", | |
1da177e4 | 685 | [2] = "Pentium 75 - 200", |
65eb6b43 | 686 | [3] = "OverDrive PODP5V83", |
1da177e4 | 687 | [4] = "Pentium MMX", |
65eb6b43 | 688 | [7] = "Mobile Pentium 75 - 200", |
1da177e4 LT |
689 | [8] = "Mobile Pentium MMX" |
690 | } | |
691 | }, | |
09dc68d9 | 692 | { .family = 6, .model_names = |
65eb6b43 | 693 | { |
1da177e4 | 694 | [0] = "Pentium Pro A-step", |
65eb6b43 PC |
695 | [1] = "Pentium Pro", |
696 | [3] = "Pentium II (Klamath)", | |
697 | [4] = "Pentium II (Deschutes)", | |
698 | [5] = "Pentium II (Deschutes)", | |
1da177e4 | 699 | [6] = "Mobile Pentium II", |
65eb6b43 PC |
700 | [7] = "Pentium III (Katmai)", |
701 | [8] = "Pentium III (Coppermine)", | |
1da177e4 LT |
702 | [10] = "Pentium III (Cascades)", |
703 | [11] = "Pentium III (Tualatin)", | |
704 | } | |
705 | }, | |
09dc68d9 | 706 | { .family = 15, .model_names = |
1da177e4 LT |
707 | { |
708 | [0] = "Pentium 4 (Unknown)", | |
709 | [1] = "Pentium 4 (Willamette)", | |
710 | [2] = "Pentium 4 (Northwood)", | |
711 | [4] = "Pentium 4 (Foster)", | |
712 | [5] = "Pentium 4 (Foster)", | |
713 | } | |
714 | }, | |
715 | }, | |
09dc68d9 | 716 | .legacy_cache_size = intel_size_cache, |
185f3b9d | 717 | #endif |
e0ba94f1 | 718 | .c_detect_tlb = intel_detect_tlb, |
03ae5768 | 719 | .c_early_init = early_init_intel, |
1da177e4 | 720 | .c_init = init_intel, |
10a434fc | 721 | .c_x86_vendor = X86_VENDOR_INTEL, |
1da177e4 LT |
722 | }; |
723 | ||
10a434fc | 724 | cpu_dev_register(intel_cpu_dev); |
1da177e4 | 725 |