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GFS2: Check for glock already held in gfs2_getxattr
[deliverable/linux.git] / arch / x86 / kernel / cpu / intel.c
1 #include <linux/init.h>
2 #include <linux/kernel.h>
3
4 #include <linux/string.h>
5 #include <linux/bitops.h>
6 #include <linux/smp.h>
7 #include <linux/sched.h>
8 #include <linux/thread_info.h>
9 #include <linux/module.h>
10 #include <linux/uaccess.h>
11
12 #include <asm/processor.h>
13 #include <asm/pgtable.h>
14 #include <asm/msr.h>
15 #include <asm/bugs.h>
16 #include <asm/cpu.h>
17
18 #ifdef CONFIG_X86_64
19 #include <linux/topology.h>
20 #endif
21
22 #include "cpu.h"
23
24 #ifdef CONFIG_X86_LOCAL_APIC
25 #include <asm/mpspec.h>
26 #include <asm/apic.h>
27 #endif
28
29 static void __cpuinit early_init_intel(struct cpuinfo_x86 *c)
30 {
31 u64 misc_enable;
32
33 /* Unmask CPUID levels if masked: */
34 if (c->x86 > 6 || (c->x86 == 6 && c->x86_model >= 0xd)) {
35 rdmsrl(MSR_IA32_MISC_ENABLE, misc_enable);
36
37 if (misc_enable & MSR_IA32_MISC_ENABLE_LIMIT_CPUID) {
38 misc_enable &= ~MSR_IA32_MISC_ENABLE_LIMIT_CPUID;
39 wrmsrl(MSR_IA32_MISC_ENABLE, misc_enable);
40 c->cpuid_level = cpuid_eax(0);
41 get_cpu_cap(c);
42 }
43 }
44
45 if ((c->x86 == 0xf && c->x86_model >= 0x03) ||
46 (c->x86 == 0x6 && c->x86_model >= 0x0e))
47 set_cpu_cap(c, X86_FEATURE_CONSTANT_TSC);
48
49 if (c->x86 >= 6 && !cpu_has(c, X86_FEATURE_IA64)) {
50 unsigned lower_word;
51
52 wrmsr(MSR_IA32_UCODE_REV, 0, 0);
53 /* Required by the SDM */
54 sync_core();
55 rdmsr(MSR_IA32_UCODE_REV, lower_word, c->microcode);
56 }
57
58 /*
59 * Atom erratum AAE44/AAF40/AAG38/AAH41:
60 *
61 * A race condition between speculative fetches and invalidating
62 * a large page. This is worked around in microcode, but we
63 * need the microcode to have already been loaded... so if it is
64 * not, recommend a BIOS update and disable large pages.
65 */
66 if (c->x86 == 6 && c->x86_model == 0x1c && c->x86_mask <= 2 &&
67 c->microcode < 0x20e) {
68 printk(KERN_WARNING "Atom PSE erratum detected, BIOS microcode update recommended\n");
69 clear_cpu_cap(c, X86_FEATURE_PSE);
70 }
71
72 #ifdef CONFIG_X86_64
73 set_cpu_cap(c, X86_FEATURE_SYSENTER32);
74 #else
75 /* Netburst reports 64 bytes clflush size, but does IO in 128 bytes */
76 if (c->x86 == 15 && c->x86_cache_alignment == 64)
77 c->x86_cache_alignment = 128;
78 #endif
79
80 /* CPUID workaround for 0F33/0F34 CPU */
81 if (c->x86 == 0xF && c->x86_model == 0x3
82 && (c->x86_mask == 0x3 || c->x86_mask == 0x4))
83 c->x86_phys_bits = 36;
84
85 /*
86 * c->x86_power is 8000_0007 edx. Bit 8 is TSC runs at constant rate
87 * with P/T states and does not stop in deep C-states.
88 *
89 * It is also reliable across cores and sockets. (but not across
90 * cabinets - we turn it off in that case explicitly.)
91 */
92 if (c->x86_power & (1 << 8)) {
93 set_cpu_cap(c, X86_FEATURE_CONSTANT_TSC);
94 set_cpu_cap(c, X86_FEATURE_NONSTOP_TSC);
95 if (!check_tsc_unstable())
96 sched_clock_stable = 1;
97 }
98
99 /* Penwell and Cloverview have the TSC which doesn't sleep on S3 */
100 if (c->x86 == 6) {
101 switch (c->x86_model) {
102 case 0x27: /* Penwell */
103 case 0x35: /* Cloverview */
104 set_cpu_cap(c, X86_FEATURE_NONSTOP_TSC_S3);
105 break;
106 default:
107 break;
108 }
109 }
110
111 /*
112 * There is a known erratum on Pentium III and Core Solo
113 * and Core Duo CPUs.
114 * " Page with PAT set to WC while associated MTRR is UC
115 * may consolidate to UC "
116 * Because of this erratum, it is better to stick with
117 * setting WC in MTRR rather than using PAT on these CPUs.
118 *
119 * Enable PAT WC only on P4, Core 2 or later CPUs.
120 */
121 if (c->x86 == 6 && c->x86_model < 15)
122 clear_cpu_cap(c, X86_FEATURE_PAT);
123
124 #ifdef CONFIG_KMEMCHECK
125 /*
126 * P4s have a "fast strings" feature which causes single-
127 * stepping REP instructions to only generate a #DB on
128 * cache-line boundaries.
129 *
130 * Ingo Molnar reported a Pentium D (model 6) and a Xeon
131 * (model 2) with the same problem.
132 */
133 if (c->x86 == 15) {
134 rdmsrl(MSR_IA32_MISC_ENABLE, misc_enable);
135
136 if (misc_enable & MSR_IA32_MISC_ENABLE_FAST_STRING) {
137 printk(KERN_INFO "kmemcheck: Disabling fast string operations\n");
138
139 misc_enable &= ~MSR_IA32_MISC_ENABLE_FAST_STRING;
140 wrmsrl(MSR_IA32_MISC_ENABLE, misc_enable);
141 }
142 }
143 #endif
144
145 /*
146 * If fast string is not enabled in IA32_MISC_ENABLE for any reason,
147 * clear the fast string and enhanced fast string CPU capabilities.
148 */
149 if (c->x86 > 6 || (c->x86 == 6 && c->x86_model >= 0xd)) {
150 rdmsrl(MSR_IA32_MISC_ENABLE, misc_enable);
151 if (!(misc_enable & MSR_IA32_MISC_ENABLE_FAST_STRING)) {
152 printk(KERN_INFO "Disabled fast string operations\n");
153 setup_clear_cpu_cap(X86_FEATURE_REP_GOOD);
154 setup_clear_cpu_cap(X86_FEATURE_ERMS);
155 }
156 }
157 }
158
159 #ifdef CONFIG_X86_32
160 /*
161 * Early probe support logic for ppro memory erratum #50
162 *
163 * This is called before we do cpu ident work
164 */
165
166 int __cpuinit ppro_with_ram_bug(void)
167 {
168 /* Uses data from early_cpu_detect now */
169 if (boot_cpu_data.x86_vendor == X86_VENDOR_INTEL &&
170 boot_cpu_data.x86 == 6 &&
171 boot_cpu_data.x86_model == 1 &&
172 boot_cpu_data.x86_mask < 8) {
173 printk(KERN_INFO "Pentium Pro with Errata#50 detected. Taking evasive action.\n");
174 return 1;
175 }
176 return 0;
177 }
178
179 static void __cpuinit intel_smp_check(struct cpuinfo_x86 *c)
180 {
181 /* calling is from identify_secondary_cpu() ? */
182 if (!c->cpu_index)
183 return;
184
185 /*
186 * Mask B, Pentium, but not Pentium MMX
187 */
188 if (c->x86 == 5 &&
189 c->x86_mask >= 1 && c->x86_mask <= 4 &&
190 c->x86_model <= 3) {
191 /*
192 * Remember we have B step Pentia with bugs
193 */
194 WARN_ONCE(1, "WARNING: SMP operation may be unreliable"
195 "with B stepping processors.\n");
196 }
197 }
198
199 static void __cpuinit intel_workarounds(struct cpuinfo_x86 *c)
200 {
201 unsigned long lo, hi;
202
203 #ifdef CONFIG_X86_F00F_BUG
204 /*
205 * All current models of Pentium and Pentium with MMX technology CPUs
206 * have the F0 0F bug, which lets nonprivileged users lock up the
207 * system. Announce that the fault handler will be checking for it.
208 */
209 clear_cpu_bug(c, X86_BUG_F00F);
210 if (!paravirt_enabled() && c->x86 == 5) {
211 static int f00f_workaround_enabled;
212
213 set_cpu_bug(c, X86_BUG_F00F);
214 if (!f00f_workaround_enabled) {
215 printk(KERN_NOTICE "Intel Pentium with F0 0F bug - workaround enabled.\n");
216 f00f_workaround_enabled = 1;
217 }
218 }
219 #endif
220
221 /*
222 * SEP CPUID bug: Pentium Pro reports SEP but doesn't have it until
223 * model 3 mask 3
224 */
225 if ((c->x86<<8 | c->x86_model<<4 | c->x86_mask) < 0x633)
226 clear_cpu_cap(c, X86_FEATURE_SEP);
227
228 /*
229 * P4 Xeon errata 037 workaround.
230 * Hardware prefetcher may cause stale data to be loaded into the cache.
231 */
232 if ((c->x86 == 15) && (c->x86_model == 1) && (c->x86_mask == 1)) {
233 rdmsr(MSR_IA32_MISC_ENABLE, lo, hi);
234 if ((lo & MSR_IA32_MISC_ENABLE_PREFETCH_DISABLE) == 0) {
235 printk (KERN_INFO "CPU: C0 stepping P4 Xeon detected.\n");
236 printk (KERN_INFO "CPU: Disabling hardware prefetching (Errata 037)\n");
237 lo |= MSR_IA32_MISC_ENABLE_PREFETCH_DISABLE;
238 wrmsr(MSR_IA32_MISC_ENABLE, lo, hi);
239 }
240 }
241
242 /*
243 * See if we have a good local APIC by checking for buggy Pentia,
244 * i.e. all B steppings and the C2 stepping of P54C when using their
245 * integrated APIC (see 11AP erratum in "Pentium Processor
246 * Specification Update").
247 */
248 if (cpu_has_apic && (c->x86<<8 | c->x86_model<<4) == 0x520 &&
249 (c->x86_mask < 0x6 || c->x86_mask == 0xb))
250 set_cpu_cap(c, X86_FEATURE_11AP);
251
252
253 #ifdef CONFIG_X86_INTEL_USERCOPY
254 /*
255 * Set up the preferred alignment for movsl bulk memory moves
256 */
257 switch (c->x86) {
258 case 4: /* 486: untested */
259 break;
260 case 5: /* Old Pentia: untested */
261 break;
262 case 6: /* PII/PIII only like movsl with 8-byte alignment */
263 movsl_mask.mask = 7;
264 break;
265 case 15: /* P4 is OK down to 8-byte alignment */
266 movsl_mask.mask = 7;
267 break;
268 }
269 #endif
270
271 #ifdef CONFIG_X86_NUMAQ
272 numaq_tsc_disable();
273 #endif
274
275 intel_smp_check(c);
276 }
277 #else
278 static void __cpuinit intel_workarounds(struct cpuinfo_x86 *c)
279 {
280 }
281 #endif
282
283 static void __cpuinit srat_detect_node(struct cpuinfo_x86 *c)
284 {
285 #ifdef CONFIG_NUMA
286 unsigned node;
287 int cpu = smp_processor_id();
288
289 /* Don't do the funky fallback heuristics the AMD version employs
290 for now. */
291 node = numa_cpu_node(cpu);
292 if (node == NUMA_NO_NODE || !node_online(node)) {
293 /* reuse the value from init_cpu_to_node() */
294 node = cpu_to_node(cpu);
295 }
296 numa_set_node(cpu, node);
297 #endif
298 }
299
300 /*
301 * find out the number of processor cores on the die
302 */
303 static int __cpuinit intel_num_cpu_cores(struct cpuinfo_x86 *c)
304 {
305 unsigned int eax, ebx, ecx, edx;
306
307 if (c->cpuid_level < 4)
308 return 1;
309
310 /* Intel has a non-standard dependency on %ecx for this CPUID level. */
311 cpuid_count(4, 0, &eax, &ebx, &ecx, &edx);
312 if (eax & 0x1f)
313 return (eax >> 26) + 1;
314 else
315 return 1;
316 }
317
318 static void __cpuinit detect_vmx_virtcap(struct cpuinfo_x86 *c)
319 {
320 /* Intel VMX MSR indicated features */
321 #define X86_VMX_FEATURE_PROC_CTLS_TPR_SHADOW 0x00200000
322 #define X86_VMX_FEATURE_PROC_CTLS_VNMI 0x00400000
323 #define X86_VMX_FEATURE_PROC_CTLS_2ND_CTLS 0x80000000
324 #define X86_VMX_FEATURE_PROC_CTLS2_VIRT_APIC 0x00000001
325 #define X86_VMX_FEATURE_PROC_CTLS2_EPT 0x00000002
326 #define X86_VMX_FEATURE_PROC_CTLS2_VPID 0x00000020
327
328 u32 vmx_msr_low, vmx_msr_high, msr_ctl, msr_ctl2;
329
330 clear_cpu_cap(c, X86_FEATURE_TPR_SHADOW);
331 clear_cpu_cap(c, X86_FEATURE_VNMI);
332 clear_cpu_cap(c, X86_FEATURE_FLEXPRIORITY);
333 clear_cpu_cap(c, X86_FEATURE_EPT);
334 clear_cpu_cap(c, X86_FEATURE_VPID);
335
336 rdmsr(MSR_IA32_VMX_PROCBASED_CTLS, vmx_msr_low, vmx_msr_high);
337 msr_ctl = vmx_msr_high | vmx_msr_low;
338 if (msr_ctl & X86_VMX_FEATURE_PROC_CTLS_TPR_SHADOW)
339 set_cpu_cap(c, X86_FEATURE_TPR_SHADOW);
340 if (msr_ctl & X86_VMX_FEATURE_PROC_CTLS_VNMI)
341 set_cpu_cap(c, X86_FEATURE_VNMI);
342 if (msr_ctl & X86_VMX_FEATURE_PROC_CTLS_2ND_CTLS) {
343 rdmsr(MSR_IA32_VMX_PROCBASED_CTLS2,
344 vmx_msr_low, vmx_msr_high);
345 msr_ctl2 = vmx_msr_high | vmx_msr_low;
346 if ((msr_ctl2 & X86_VMX_FEATURE_PROC_CTLS2_VIRT_APIC) &&
347 (msr_ctl & X86_VMX_FEATURE_PROC_CTLS_TPR_SHADOW))
348 set_cpu_cap(c, X86_FEATURE_FLEXPRIORITY);
349 if (msr_ctl2 & X86_VMX_FEATURE_PROC_CTLS2_EPT)
350 set_cpu_cap(c, X86_FEATURE_EPT);
351 if (msr_ctl2 & X86_VMX_FEATURE_PROC_CTLS2_VPID)
352 set_cpu_cap(c, X86_FEATURE_VPID);
353 }
354 }
355
356 static void __cpuinit init_intel(struct cpuinfo_x86 *c)
357 {
358 unsigned int l2 = 0;
359
360 early_init_intel(c);
361
362 intel_workarounds(c);
363
364 /*
365 * Detect the extended topology information if available. This
366 * will reinitialise the initial_apicid which will be used
367 * in init_intel_cacheinfo()
368 */
369 detect_extended_topology(c);
370
371 l2 = init_intel_cacheinfo(c);
372 if (c->cpuid_level > 9) {
373 unsigned eax = cpuid_eax(10);
374 /* Check for version and the number of counters */
375 if ((eax & 0xff) && (((eax>>8) & 0xff) > 1))
376 set_cpu_cap(c, X86_FEATURE_ARCH_PERFMON);
377 }
378
379 if (cpu_has_xmm2)
380 set_cpu_cap(c, X86_FEATURE_LFENCE_RDTSC);
381 if (cpu_has_ds) {
382 unsigned int l1;
383 rdmsr(MSR_IA32_MISC_ENABLE, l1, l2);
384 if (!(l1 & (1<<11)))
385 set_cpu_cap(c, X86_FEATURE_BTS);
386 if (!(l1 & (1<<12)))
387 set_cpu_cap(c, X86_FEATURE_PEBS);
388 }
389
390 if (c->x86 == 6 && c->x86_model == 29 && cpu_has_clflush)
391 set_cpu_cap(c, X86_FEATURE_CLFLUSH_MONITOR);
392
393 #ifdef CONFIG_X86_64
394 if (c->x86 == 15)
395 c->x86_cache_alignment = c->x86_clflush_size * 2;
396 if (c->x86 == 6)
397 set_cpu_cap(c, X86_FEATURE_REP_GOOD);
398 #else
399 /*
400 * Names for the Pentium II/Celeron processors
401 * detectable only by also checking the cache size.
402 * Dixon is NOT a Celeron.
403 */
404 if (c->x86 == 6) {
405 char *p = NULL;
406
407 switch (c->x86_model) {
408 case 5:
409 if (l2 == 0)
410 p = "Celeron (Covington)";
411 else if (l2 == 256)
412 p = "Mobile Pentium II (Dixon)";
413 break;
414
415 case 6:
416 if (l2 == 128)
417 p = "Celeron (Mendocino)";
418 else if (c->x86_mask == 0 || c->x86_mask == 5)
419 p = "Celeron-A";
420 break;
421
422 case 8:
423 if (l2 == 128)
424 p = "Celeron (Coppermine)";
425 break;
426 }
427
428 if (p)
429 strcpy(c->x86_model_id, p);
430 }
431
432 if (c->x86 == 15)
433 set_cpu_cap(c, X86_FEATURE_P4);
434 if (c->x86 == 6)
435 set_cpu_cap(c, X86_FEATURE_P3);
436 #endif
437
438 if (!cpu_has(c, X86_FEATURE_XTOPOLOGY)) {
439 /*
440 * let's use the legacy cpuid vector 0x1 and 0x4 for topology
441 * detection.
442 */
443 c->x86_max_cores = intel_num_cpu_cores(c);
444 #ifdef CONFIG_X86_32
445 detect_ht(c);
446 #endif
447 }
448
449 /* Work around errata */
450 srat_detect_node(c);
451
452 if (cpu_has(c, X86_FEATURE_VMX))
453 detect_vmx_virtcap(c);
454
455 /*
456 * Initialize MSR_IA32_ENERGY_PERF_BIAS if BIOS did not.
457 * x86_energy_perf_policy(8) is available to change it at run-time
458 */
459 if (cpu_has(c, X86_FEATURE_EPB)) {
460 u64 epb;
461
462 rdmsrl(MSR_IA32_ENERGY_PERF_BIAS, epb);
463 if ((epb & 0xF) == ENERGY_PERF_BIAS_PERFORMANCE) {
464 printk_once(KERN_WARNING "ENERGY_PERF_BIAS:"
465 " Set to 'normal', was 'performance'\n"
466 "ENERGY_PERF_BIAS: View and update with"
467 " x86_energy_perf_policy(8)\n");
468 epb = (epb & ~0xF) | ENERGY_PERF_BIAS_NORMAL;
469 wrmsrl(MSR_IA32_ENERGY_PERF_BIAS, epb);
470 }
471 }
472 }
473
474 #ifdef CONFIG_X86_32
475 static unsigned int __cpuinit intel_size_cache(struct cpuinfo_x86 *c, unsigned int size)
476 {
477 /*
478 * Intel PIII Tualatin. This comes in two flavours.
479 * One has 256kb of cache, the other 512. We have no way
480 * to determine which, so we use a boottime override
481 * for the 512kb model, and assume 256 otherwise.
482 */
483 if ((c->x86 == 6) && (c->x86_model == 11) && (size == 0))
484 size = 256;
485 return size;
486 }
487 #endif
488
489 #define TLB_INST_4K 0x01
490 #define TLB_INST_4M 0x02
491 #define TLB_INST_2M_4M 0x03
492
493 #define TLB_INST_ALL 0x05
494 #define TLB_INST_1G 0x06
495
496 #define TLB_DATA_4K 0x11
497 #define TLB_DATA_4M 0x12
498 #define TLB_DATA_2M_4M 0x13
499 #define TLB_DATA_4K_4M 0x14
500
501 #define TLB_DATA_1G 0x16
502
503 #define TLB_DATA0_4K 0x21
504 #define TLB_DATA0_4M 0x22
505 #define TLB_DATA0_2M_4M 0x23
506
507 #define STLB_4K 0x41
508
509 static const struct _tlb_table intel_tlb_table[] __cpuinitconst = {
510 { 0x01, TLB_INST_4K, 32, " TLB_INST 4 KByte pages, 4-way set associative" },
511 { 0x02, TLB_INST_4M, 2, " TLB_INST 4 MByte pages, full associative" },
512 { 0x03, TLB_DATA_4K, 64, " TLB_DATA 4 KByte pages, 4-way set associative" },
513 { 0x04, TLB_DATA_4M, 8, " TLB_DATA 4 MByte pages, 4-way set associative" },
514 { 0x05, TLB_DATA_4M, 32, " TLB_DATA 4 MByte pages, 4-way set associative" },
515 { 0x0b, TLB_INST_4M, 4, " TLB_INST 4 MByte pages, 4-way set associative" },
516 { 0x4f, TLB_INST_4K, 32, " TLB_INST 4 KByte pages */" },
517 { 0x50, TLB_INST_ALL, 64, " TLB_INST 4 KByte and 2-MByte or 4-MByte pages" },
518 { 0x51, TLB_INST_ALL, 128, " TLB_INST 4 KByte and 2-MByte or 4-MByte pages" },
519 { 0x52, TLB_INST_ALL, 256, " TLB_INST 4 KByte and 2-MByte or 4-MByte pages" },
520 { 0x55, TLB_INST_2M_4M, 7, " TLB_INST 2-MByte or 4-MByte pages, fully associative" },
521 { 0x56, TLB_DATA0_4M, 16, " TLB_DATA0 4 MByte pages, 4-way set associative" },
522 { 0x57, TLB_DATA0_4K, 16, " TLB_DATA0 4 KByte pages, 4-way associative" },
523 { 0x59, TLB_DATA0_4K, 16, " TLB_DATA0 4 KByte pages, fully associative" },
524 { 0x5a, TLB_DATA0_2M_4M, 32, " TLB_DATA0 2-MByte or 4 MByte pages, 4-way set associative" },
525 { 0x5b, TLB_DATA_4K_4M, 64, " TLB_DATA 4 KByte and 4 MByte pages" },
526 { 0x5c, TLB_DATA_4K_4M, 128, " TLB_DATA 4 KByte and 4 MByte pages" },
527 { 0x5d, TLB_DATA_4K_4M, 256, " TLB_DATA 4 KByte and 4 MByte pages" },
528 { 0xb0, TLB_INST_4K, 128, " TLB_INST 4 KByte pages, 4-way set associative" },
529 { 0xb1, TLB_INST_2M_4M, 4, " TLB_INST 2M pages, 4-way, 8 entries or 4M pages, 4-way entries" },
530 { 0xb2, TLB_INST_4K, 64, " TLB_INST 4KByte pages, 4-way set associative" },
531 { 0xb3, TLB_DATA_4K, 128, " TLB_DATA 4 KByte pages, 4-way set associative" },
532 { 0xb4, TLB_DATA_4K, 256, " TLB_DATA 4 KByte pages, 4-way associative" },
533 { 0xba, TLB_DATA_4K, 64, " TLB_DATA 4 KByte pages, 4-way associative" },
534 { 0xc0, TLB_DATA_4K_4M, 8, " TLB_DATA 4 KByte and 4 MByte pages, 4-way associative" },
535 { 0xca, STLB_4K, 512, " STLB 4 KByte pages, 4-way associative" },
536 { 0x00, 0, 0 }
537 };
538
539 static void __cpuinit intel_tlb_lookup(const unsigned char desc)
540 {
541 unsigned char k;
542 if (desc == 0)
543 return;
544
545 /* look up this descriptor in the table */
546 for (k = 0; intel_tlb_table[k].descriptor != desc && \
547 intel_tlb_table[k].descriptor != 0; k++)
548 ;
549
550 if (intel_tlb_table[k].tlb_type == 0)
551 return;
552
553 switch (intel_tlb_table[k].tlb_type) {
554 case STLB_4K:
555 if (tlb_lli_4k[ENTRIES] < intel_tlb_table[k].entries)
556 tlb_lli_4k[ENTRIES] = intel_tlb_table[k].entries;
557 if (tlb_lld_4k[ENTRIES] < intel_tlb_table[k].entries)
558 tlb_lld_4k[ENTRIES] = intel_tlb_table[k].entries;
559 break;
560 case TLB_INST_ALL:
561 if (tlb_lli_4k[ENTRIES] < intel_tlb_table[k].entries)
562 tlb_lli_4k[ENTRIES] = intel_tlb_table[k].entries;
563 if (tlb_lli_2m[ENTRIES] < intel_tlb_table[k].entries)
564 tlb_lli_2m[ENTRIES] = intel_tlb_table[k].entries;
565 if (tlb_lli_4m[ENTRIES] < intel_tlb_table[k].entries)
566 tlb_lli_4m[ENTRIES] = intel_tlb_table[k].entries;
567 break;
568 case TLB_INST_4K:
569 if (tlb_lli_4k[ENTRIES] < intel_tlb_table[k].entries)
570 tlb_lli_4k[ENTRIES] = intel_tlb_table[k].entries;
571 break;
572 case TLB_INST_4M:
573 if (tlb_lli_4m[ENTRIES] < intel_tlb_table[k].entries)
574 tlb_lli_4m[ENTRIES] = intel_tlb_table[k].entries;
575 break;
576 case TLB_INST_2M_4M:
577 if (tlb_lli_2m[ENTRIES] < intel_tlb_table[k].entries)
578 tlb_lli_2m[ENTRIES] = intel_tlb_table[k].entries;
579 if (tlb_lli_4m[ENTRIES] < intel_tlb_table[k].entries)
580 tlb_lli_4m[ENTRIES] = intel_tlb_table[k].entries;
581 break;
582 case TLB_DATA_4K:
583 case TLB_DATA0_4K:
584 if (tlb_lld_4k[ENTRIES] < intel_tlb_table[k].entries)
585 tlb_lld_4k[ENTRIES] = intel_tlb_table[k].entries;
586 break;
587 case TLB_DATA_4M:
588 case TLB_DATA0_4M:
589 if (tlb_lld_4m[ENTRIES] < intel_tlb_table[k].entries)
590 tlb_lld_4m[ENTRIES] = intel_tlb_table[k].entries;
591 break;
592 case TLB_DATA_2M_4M:
593 case TLB_DATA0_2M_4M:
594 if (tlb_lld_2m[ENTRIES] < intel_tlb_table[k].entries)
595 tlb_lld_2m[ENTRIES] = intel_tlb_table[k].entries;
596 if (tlb_lld_4m[ENTRIES] < intel_tlb_table[k].entries)
597 tlb_lld_4m[ENTRIES] = intel_tlb_table[k].entries;
598 break;
599 case TLB_DATA_4K_4M:
600 if (tlb_lld_4k[ENTRIES] < intel_tlb_table[k].entries)
601 tlb_lld_4k[ENTRIES] = intel_tlb_table[k].entries;
602 if (tlb_lld_4m[ENTRIES] < intel_tlb_table[k].entries)
603 tlb_lld_4m[ENTRIES] = intel_tlb_table[k].entries;
604 break;
605 }
606 }
607
608 static void __cpuinit intel_tlb_flushall_shift_set(struct cpuinfo_x86 *c)
609 {
610 switch ((c->x86 << 8) + c->x86_model) {
611 case 0x60f: /* original 65 nm celeron/pentium/core2/xeon, "Merom"/"Conroe" */
612 case 0x616: /* single-core 65 nm celeron/core2solo "Merom-L"/"Conroe-L" */
613 case 0x617: /* current 45 nm celeron/core2/xeon "Penryn"/"Wolfdale" */
614 case 0x61d: /* six-core 45 nm xeon "Dunnington" */
615 tlb_flushall_shift = -1;
616 break;
617 case 0x61a: /* 45 nm nehalem, "Bloomfield" */
618 case 0x61e: /* 45 nm nehalem, "Lynnfield" */
619 case 0x625: /* 32 nm nehalem, "Clarkdale" */
620 case 0x62c: /* 32 nm nehalem, "Gulftown" */
621 case 0x62e: /* 45 nm nehalem-ex, "Beckton" */
622 case 0x62f: /* 32 nm Xeon E7 */
623 tlb_flushall_shift = 6;
624 break;
625 case 0x62a: /* SandyBridge */
626 case 0x62d: /* SandyBridge, "Romely-EP" */
627 tlb_flushall_shift = 5;
628 break;
629 case 0x63a: /* Ivybridge */
630 tlb_flushall_shift = 1;
631 break;
632 default:
633 tlb_flushall_shift = 6;
634 }
635 }
636
637 static void __cpuinit intel_detect_tlb(struct cpuinfo_x86 *c)
638 {
639 int i, j, n;
640 unsigned int regs[4];
641 unsigned char *desc = (unsigned char *)regs;
642
643 if (c->cpuid_level < 2)
644 return;
645
646 /* Number of times to iterate */
647 n = cpuid_eax(2) & 0xFF;
648
649 for (i = 0 ; i < n ; i++) {
650 cpuid(2, &regs[0], &regs[1], &regs[2], &regs[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 intel_tlb_flushall_shift_set(c);
662 }
663
664 static const struct cpu_dev __cpuinitconst intel_cpu_dev = {
665 .c_vendor = "Intel",
666 .c_ident = { "GenuineIntel" },
667 #ifdef CONFIG_X86_32
668 .c_models = {
669 { .vendor = X86_VENDOR_INTEL, .family = 4, .model_names =
670 {
671 [0] = "486 DX-25/33",
672 [1] = "486 DX-50",
673 [2] = "486 SX",
674 [3] = "486 DX/2",
675 [4] = "486 SL",
676 [5] = "486 SX/2",
677 [7] = "486 DX/2-WB",
678 [8] = "486 DX/4",
679 [9] = "486 DX/4-WB"
680 }
681 },
682 { .vendor = X86_VENDOR_INTEL, .family = 5, .model_names =
683 {
684 [0] = "Pentium 60/66 A-step",
685 [1] = "Pentium 60/66",
686 [2] = "Pentium 75 - 200",
687 [3] = "OverDrive PODP5V83",
688 [4] = "Pentium MMX",
689 [7] = "Mobile Pentium 75 - 200",
690 [8] = "Mobile Pentium MMX"
691 }
692 },
693 { .vendor = X86_VENDOR_INTEL, .family = 6, .model_names =
694 {
695 [0] = "Pentium Pro A-step",
696 [1] = "Pentium Pro",
697 [3] = "Pentium II (Klamath)",
698 [4] = "Pentium II (Deschutes)",
699 [5] = "Pentium II (Deschutes)",
700 [6] = "Mobile Pentium II",
701 [7] = "Pentium III (Katmai)",
702 [8] = "Pentium III (Coppermine)",
703 [10] = "Pentium III (Cascades)",
704 [11] = "Pentium III (Tualatin)",
705 }
706 },
707 { .vendor = X86_VENDOR_INTEL, .family = 15, .model_names =
708 {
709 [0] = "Pentium 4 (Unknown)",
710 [1] = "Pentium 4 (Willamette)",
711 [2] = "Pentium 4 (Northwood)",
712 [4] = "Pentium 4 (Foster)",
713 [5] = "Pentium 4 (Foster)",
714 }
715 },
716 },
717 .c_size_cache = intel_size_cache,
718 #endif
719 .c_detect_tlb = intel_detect_tlb,
720 .c_early_init = early_init_intel,
721 .c_init = init_intel,
722 .c_x86_vendor = X86_VENDOR_INTEL,
723 };
724
725 cpu_dev_register(intel_cpu_dev);
726
Linux kernel - Deliverables
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