1 #include <linux/init.h>
2 #include <linux/kernel.h>
4 #include <linux/string.h>
5 #include <linux/bitops.h>
7 #include <linux/sched.h>
8 #include <linux/thread_info.h>
9 #include <linux/module.h>
10 #include <linux/uaccess.h>
12 #include <asm/processor.h>
13 #include <asm/pgtable.h>
19 #include <linux/topology.h>
24 #ifdef CONFIG_X86_LOCAL_APIC
25 #include <asm/mpspec.h>
29 static void __cpuinit early_init_intel(struct cpuinfo_x86 *c)
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);
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);
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);
49 if (c->x86 >= 6 && !cpu_has(c, X86_FEATURE_IA64)) {
52 wrmsr(MSR_IA32_UCODE_REV, 0, 0);
53 /* Required by the SDM */
55 rdmsr(MSR_IA32_UCODE_REV, lower_word, c->microcode);
59 * Atom erratum AAE44/AAF40/AAG38/AAH41:
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.
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);
73 set_cpu_cap(c, X86_FEATURE_SYSENTER32);
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;
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;
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.
89 * It is also reliable across cores and sockets. (but not across
90 * cabinets - we turn it off in that case explicitly.)
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;
99 /* Penwell and Cloverview have the TSC which doesn't sleep on S3 */
101 switch (c->x86_model) {
102 case 0x27: /* Penwell */
103 case 0x35: /* Cloverview */
104 set_cpu_cap(c, X86_FEATURE_NONSTOP_TSC_S3);
112 * There is a known erratum on Pentium III and Core Solo
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.
119 * Enable PAT WC only on P4, Core 2 or later CPUs.
121 if (c->x86 == 6 && c->x86_model < 15)
122 clear_cpu_cap(c, X86_FEATURE_PAT);
124 #ifdef CONFIG_KMEMCHECK
126 * P4s have a "fast strings" feature which causes single-
127 * stepping REP instructions to only generate a #DB on
128 * cache-line boundaries.
130 * Ingo Molnar reported a Pentium D (model 6) and a Xeon
131 * (model 2) with the same problem.
134 rdmsrl(MSR_IA32_MISC_ENABLE, misc_enable);
136 if (misc_enable & MSR_IA32_MISC_ENABLE_FAST_STRING) {
137 printk(KERN_INFO "kmemcheck: Disabling fast string operations\n");
139 misc_enable &= ~MSR_IA32_MISC_ENABLE_FAST_STRING;
140 wrmsrl(MSR_IA32_MISC_ENABLE, misc_enable);
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.
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);
161 * Early probe support logic for ppro memory erratum #50
163 * This is called before we do cpu ident work
166 int __cpuinit ppro_with_ram_bug(void)
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");
179 #ifdef CONFIG_X86_F00F_BUG
180 static void __cpuinit trap_init_f00f_bug(void)
182 __set_fixmap(FIX_F00F_IDT, __pa_symbol(idt_table), PAGE_KERNEL_RO);
185 * Update the IDT descriptor and reload the IDT so that
186 * it uses the read-only mapped virtual address.
188 idt_descr.address = fix_to_virt(FIX_F00F_IDT);
189 load_idt(&idt_descr);
193 static void __cpuinit intel_smp_check(struct cpuinfo_x86 *c)
195 /* calling is from identify_secondary_cpu() ? */
200 * Mask B, Pentium, but not Pentium MMX
203 c->x86_mask >= 1 && c->x86_mask <= 4 &&
206 * Remember we have B step Pentia with bugs
208 WARN_ONCE(1, "WARNING: SMP operation may be unreliable"
209 "with B stepping processors.\n");
213 static void __cpuinit intel_workarounds(struct cpuinfo_x86 *c)
215 unsigned long lo, hi;
217 #ifdef CONFIG_X86_F00F_BUG
219 * All current models of Pentium and Pentium with MMX technology CPUs
220 * have the F0 0F bug, which lets nonprivileged users lock up the
222 * Note that the workaround only should be initialized once...
225 if (!paravirt_enabled() && c->x86 == 5) {
226 static int f00f_workaround_enabled;
229 if (!f00f_workaround_enabled) {
230 trap_init_f00f_bug();
231 printk(KERN_NOTICE "Intel Pentium with F0 0F bug - workaround enabled.\n");
232 f00f_workaround_enabled = 1;
238 * SEP CPUID bug: Pentium Pro reports SEP but doesn't have it until
241 if ((c->x86<<8 | c->x86_model<<4 | c->x86_mask) < 0x633)
242 clear_cpu_cap(c, X86_FEATURE_SEP);
245 * P4 Xeon errata 037 workaround.
246 * Hardware prefetcher may cause stale data to be loaded into the cache.
248 if ((c->x86 == 15) && (c->x86_model == 1) && (c->x86_mask == 1)) {
249 rdmsr(MSR_IA32_MISC_ENABLE, lo, hi);
250 if ((lo & MSR_IA32_MISC_ENABLE_PREFETCH_DISABLE) == 0) {
251 printk (KERN_INFO "CPU: C0 stepping P4 Xeon detected.\n");
252 printk (KERN_INFO "CPU: Disabling hardware prefetching (Errata 037)\n");
253 lo |= MSR_IA32_MISC_ENABLE_PREFETCH_DISABLE;
254 wrmsr(MSR_IA32_MISC_ENABLE, lo, hi);
259 * See if we have a good local APIC by checking for buggy Pentia,
260 * i.e. all B steppings and the C2 stepping of P54C when using their
261 * integrated APIC (see 11AP erratum in "Pentium Processor
262 * Specification Update").
264 if (cpu_has_apic && (c->x86<<8 | c->x86_model<<4) == 0x520 &&
265 (c->x86_mask < 0x6 || c->x86_mask == 0xb))
266 set_cpu_cap(c, X86_FEATURE_11AP);
269 #ifdef CONFIG_X86_INTEL_USERCOPY
271 * Set up the preferred alignment for movsl bulk memory moves
274 case 4: /* 486: untested */
276 case 5: /* Old Pentia: untested */
278 case 6: /* PII/PIII only like movsl with 8-byte alignment */
281 case 15: /* P4 is OK down to 8-byte alignment */
287 #ifdef CONFIG_X86_NUMAQ
294 static void __cpuinit intel_workarounds(struct cpuinfo_x86 *c)
299 static void __cpuinit srat_detect_node(struct cpuinfo_x86 *c)
303 int cpu = smp_processor_id();
305 /* Don't do the funky fallback heuristics the AMD version employs
307 node = numa_cpu_node(cpu);
308 if (node == NUMA_NO_NODE || !node_online(node)) {
309 /* reuse the value from init_cpu_to_node() */
310 node = cpu_to_node(cpu);
312 numa_set_node(cpu, node);
317 * find out the number of processor cores on the die
319 static int __cpuinit intel_num_cpu_cores(struct cpuinfo_x86 *c)
321 unsigned int eax, ebx, ecx, edx;
323 if (c->cpuid_level < 4)
326 /* Intel has a non-standard dependency on %ecx for this CPUID level. */
327 cpuid_count(4, 0, &eax, &ebx, &ecx, &edx);
329 return (eax >> 26) + 1;
334 static void __cpuinit detect_vmx_virtcap(struct cpuinfo_x86 *c)
336 /* Intel VMX MSR indicated features */
337 #define X86_VMX_FEATURE_PROC_CTLS_TPR_SHADOW 0x00200000
338 #define X86_VMX_FEATURE_PROC_CTLS_VNMI 0x00400000
339 #define X86_VMX_FEATURE_PROC_CTLS_2ND_CTLS 0x80000000
340 #define X86_VMX_FEATURE_PROC_CTLS2_VIRT_APIC 0x00000001
341 #define X86_VMX_FEATURE_PROC_CTLS2_EPT 0x00000002
342 #define X86_VMX_FEATURE_PROC_CTLS2_VPID 0x00000020
344 u32 vmx_msr_low, vmx_msr_high, msr_ctl, msr_ctl2;
346 clear_cpu_cap(c, X86_FEATURE_TPR_SHADOW);
347 clear_cpu_cap(c, X86_FEATURE_VNMI);
348 clear_cpu_cap(c, X86_FEATURE_FLEXPRIORITY);
349 clear_cpu_cap(c, X86_FEATURE_EPT);
350 clear_cpu_cap(c, X86_FEATURE_VPID);
352 rdmsr(MSR_IA32_VMX_PROCBASED_CTLS, vmx_msr_low, vmx_msr_high);
353 msr_ctl = vmx_msr_high | vmx_msr_low;
354 if (msr_ctl & X86_VMX_FEATURE_PROC_CTLS_TPR_SHADOW)
355 set_cpu_cap(c, X86_FEATURE_TPR_SHADOW);
356 if (msr_ctl & X86_VMX_FEATURE_PROC_CTLS_VNMI)
357 set_cpu_cap(c, X86_FEATURE_VNMI);
358 if (msr_ctl & X86_VMX_FEATURE_PROC_CTLS_2ND_CTLS) {
359 rdmsr(MSR_IA32_VMX_PROCBASED_CTLS2,
360 vmx_msr_low, vmx_msr_high);
361 msr_ctl2 = vmx_msr_high | vmx_msr_low;
362 if ((msr_ctl2 & X86_VMX_FEATURE_PROC_CTLS2_VIRT_APIC) &&
363 (msr_ctl & X86_VMX_FEATURE_PROC_CTLS_TPR_SHADOW))
364 set_cpu_cap(c, X86_FEATURE_FLEXPRIORITY);
365 if (msr_ctl2 & X86_VMX_FEATURE_PROC_CTLS2_EPT)
366 set_cpu_cap(c, X86_FEATURE_EPT);
367 if (msr_ctl2 & X86_VMX_FEATURE_PROC_CTLS2_VPID)
368 set_cpu_cap(c, X86_FEATURE_VPID);
372 static void __cpuinit init_intel(struct cpuinfo_x86 *c)
378 intel_workarounds(c);
381 * Detect the extended topology information if available. This
382 * will reinitialise the initial_apicid which will be used
383 * in init_intel_cacheinfo()
385 detect_extended_topology(c);
387 l2 = init_intel_cacheinfo(c);
388 if (c->cpuid_level > 9) {
389 unsigned eax = cpuid_eax(10);
390 /* Check for version and the number of counters */
391 if ((eax & 0xff) && (((eax>>8) & 0xff) > 1))
392 set_cpu_cap(c, X86_FEATURE_ARCH_PERFMON);
396 set_cpu_cap(c, X86_FEATURE_LFENCE_RDTSC);
399 rdmsr(MSR_IA32_MISC_ENABLE, l1, l2);
401 set_cpu_cap(c, X86_FEATURE_BTS);
403 set_cpu_cap(c, X86_FEATURE_PEBS);
406 if (c->x86 == 6 && c->x86_model == 29 && cpu_has_clflush)
407 set_cpu_cap(c, X86_FEATURE_CLFLUSH_MONITOR);
411 c->x86_cache_alignment = c->x86_clflush_size * 2;
413 set_cpu_cap(c, X86_FEATURE_REP_GOOD);
416 * Names for the Pentium II/Celeron processors
417 * detectable only by also checking the cache size.
418 * Dixon is NOT a Celeron.
423 switch (c->x86_model) {
426 p = "Celeron (Covington)";
428 p = "Mobile Pentium II (Dixon)";
433 p = "Celeron (Mendocino)";
434 else if (c->x86_mask == 0 || c->x86_mask == 5)
440 p = "Celeron (Coppermine)";
445 strcpy(c->x86_model_id, p);
449 set_cpu_cap(c, X86_FEATURE_P4);
451 set_cpu_cap(c, X86_FEATURE_P3);
454 if (!cpu_has(c, X86_FEATURE_XTOPOLOGY)) {
456 * let's use the legacy cpuid vector 0x1 and 0x4 for topology
459 c->x86_max_cores = intel_num_cpu_cores(c);
465 /* Work around errata */
468 if (cpu_has(c, X86_FEATURE_VMX))
469 detect_vmx_virtcap(c);
472 * Initialize MSR_IA32_ENERGY_PERF_BIAS if BIOS did not.
473 * x86_energy_perf_policy(8) is available to change it at run-time
475 if (cpu_has(c, X86_FEATURE_EPB)) {
478 rdmsrl(MSR_IA32_ENERGY_PERF_BIAS, epb);
479 if ((epb & 0xF) == ENERGY_PERF_BIAS_PERFORMANCE) {
480 printk_once(KERN_WARNING "ENERGY_PERF_BIAS:"
481 " Set to 'normal', was 'performance'\n"
482 "ENERGY_PERF_BIAS: View and update with"
483 " x86_energy_perf_policy(8)\n");
484 epb = (epb & ~0xF) | ENERGY_PERF_BIAS_NORMAL;
485 wrmsrl(MSR_IA32_ENERGY_PERF_BIAS, epb);
491 static unsigned int __cpuinit intel_size_cache(struct cpuinfo_x86 *c, unsigned int size)
494 * Intel PIII Tualatin. This comes in two flavours.
495 * One has 256kb of cache, the other 512. We have no way
496 * to determine which, so we use a boottime override
497 * for the 512kb model, and assume 256 otherwise.
499 if ((c->x86 == 6) && (c->x86_model == 11) && (size == 0))
505 #define TLB_INST_4K 0x01
506 #define TLB_INST_4M 0x02
507 #define TLB_INST_2M_4M 0x03
509 #define TLB_INST_ALL 0x05
510 #define TLB_INST_1G 0x06
512 #define TLB_DATA_4K 0x11
513 #define TLB_DATA_4M 0x12
514 #define TLB_DATA_2M_4M 0x13
515 #define TLB_DATA_4K_4M 0x14
517 #define TLB_DATA_1G 0x16
519 #define TLB_DATA0_4K 0x21
520 #define TLB_DATA0_4M 0x22
521 #define TLB_DATA0_2M_4M 0x23
525 static const struct _tlb_table intel_tlb_table[] __cpuinitconst = {
526 { 0x01, TLB_INST_4K, 32, " TLB_INST 4 KByte pages, 4-way set associative" },
527 { 0x02, TLB_INST_4M, 2, " TLB_INST 4 MByte pages, full associative" },
528 { 0x03, TLB_DATA_4K, 64, " TLB_DATA 4 KByte pages, 4-way set associative" },
529 { 0x04, TLB_DATA_4M, 8, " TLB_DATA 4 MByte pages, 4-way set associative" },
530 { 0x05, TLB_DATA_4M, 32, " TLB_DATA 4 MByte pages, 4-way set associative" },
531 { 0x0b, TLB_INST_4M, 4, " TLB_INST 4 MByte pages, 4-way set associative" },
532 { 0x4f, TLB_INST_4K, 32, " TLB_INST 4 KByte pages */" },
533 { 0x50, TLB_INST_ALL, 64, " TLB_INST 4 KByte and 2-MByte or 4-MByte pages" },
534 { 0x51, TLB_INST_ALL, 128, " TLB_INST 4 KByte and 2-MByte or 4-MByte pages" },
535 { 0x52, TLB_INST_ALL, 256, " TLB_INST 4 KByte and 2-MByte or 4-MByte pages" },
536 { 0x55, TLB_INST_2M_4M, 7, " TLB_INST 2-MByte or 4-MByte pages, fully associative" },
537 { 0x56, TLB_DATA0_4M, 16, " TLB_DATA0 4 MByte pages, 4-way set associative" },
538 { 0x57, TLB_DATA0_4K, 16, " TLB_DATA0 4 KByte pages, 4-way associative" },
539 { 0x59, TLB_DATA0_4K, 16, " TLB_DATA0 4 KByte pages, fully associative" },
540 { 0x5a, TLB_DATA0_2M_4M, 32, " TLB_DATA0 2-MByte or 4 MByte pages, 4-way set associative" },
541 { 0x5b, TLB_DATA_4K_4M, 64, " TLB_DATA 4 KByte and 4 MByte pages" },
542 { 0x5c, TLB_DATA_4K_4M, 128, " TLB_DATA 4 KByte and 4 MByte pages" },
543 { 0x5d, TLB_DATA_4K_4M, 256, " TLB_DATA 4 KByte and 4 MByte pages" },
544 { 0xb0, TLB_INST_4K, 128, " TLB_INST 4 KByte pages, 4-way set associative" },
545 { 0xb1, TLB_INST_2M_4M, 4, " TLB_INST 2M pages, 4-way, 8 entries or 4M pages, 4-way entries" },
546 { 0xb2, TLB_INST_4K, 64, " TLB_INST 4KByte pages, 4-way set associative" },
547 { 0xb3, TLB_DATA_4K, 128, " TLB_DATA 4 KByte pages, 4-way set associative" },
548 { 0xb4, TLB_DATA_4K, 256, " TLB_DATA 4 KByte pages, 4-way associative" },
549 { 0xba, TLB_DATA_4K, 64, " TLB_DATA 4 KByte pages, 4-way associative" },
550 { 0xc0, TLB_DATA_4K_4M, 8, " TLB_DATA 4 KByte and 4 MByte pages, 4-way associative" },
551 { 0xca, STLB_4K, 512, " STLB 4 KByte pages, 4-way associative" },
555 static void __cpuinit intel_tlb_lookup(const unsigned char desc)
561 /* look up this descriptor in the table */
562 for (k = 0; intel_tlb_table[k].descriptor != desc && \
563 intel_tlb_table[k].descriptor != 0; k++)
566 if (intel_tlb_table[k].tlb_type == 0)
569 switch (intel_tlb_table[k].tlb_type) {
571 if (tlb_lli_4k[ENTRIES] < intel_tlb_table[k].entries)
572 tlb_lli_4k[ENTRIES] = intel_tlb_table[k].entries;
573 if (tlb_lld_4k[ENTRIES] < intel_tlb_table[k].entries)
574 tlb_lld_4k[ENTRIES] = intel_tlb_table[k].entries;
577 if (tlb_lli_4k[ENTRIES] < intel_tlb_table[k].entries)
578 tlb_lli_4k[ENTRIES] = intel_tlb_table[k].entries;
579 if (tlb_lli_2m[ENTRIES] < intel_tlb_table[k].entries)
580 tlb_lli_2m[ENTRIES] = intel_tlb_table[k].entries;
581 if (tlb_lli_4m[ENTRIES] < intel_tlb_table[k].entries)
582 tlb_lli_4m[ENTRIES] = intel_tlb_table[k].entries;
585 if (tlb_lli_4k[ENTRIES] < intel_tlb_table[k].entries)
586 tlb_lli_4k[ENTRIES] = intel_tlb_table[k].entries;
589 if (tlb_lli_4m[ENTRIES] < intel_tlb_table[k].entries)
590 tlb_lli_4m[ENTRIES] = intel_tlb_table[k].entries;
593 if (tlb_lli_2m[ENTRIES] < intel_tlb_table[k].entries)
594 tlb_lli_2m[ENTRIES] = intel_tlb_table[k].entries;
595 if (tlb_lli_4m[ENTRIES] < intel_tlb_table[k].entries)
596 tlb_lli_4m[ENTRIES] = intel_tlb_table[k].entries;
600 if (tlb_lld_4k[ENTRIES] < intel_tlb_table[k].entries)
601 tlb_lld_4k[ENTRIES] = intel_tlb_table[k].entries;
605 if (tlb_lld_4m[ENTRIES] < intel_tlb_table[k].entries)
606 tlb_lld_4m[ENTRIES] = intel_tlb_table[k].entries;
609 case TLB_DATA0_2M_4M:
610 if (tlb_lld_2m[ENTRIES] < intel_tlb_table[k].entries)
611 tlb_lld_2m[ENTRIES] = intel_tlb_table[k].entries;
612 if (tlb_lld_4m[ENTRIES] < intel_tlb_table[k].entries)
613 tlb_lld_4m[ENTRIES] = intel_tlb_table[k].entries;
616 if (tlb_lld_4k[ENTRIES] < intel_tlb_table[k].entries)
617 tlb_lld_4k[ENTRIES] = intel_tlb_table[k].entries;
618 if (tlb_lld_4m[ENTRIES] < intel_tlb_table[k].entries)
619 tlb_lld_4m[ENTRIES] = intel_tlb_table[k].entries;
624 static void __cpuinit intel_tlb_flushall_shift_set(struct cpuinfo_x86 *c)
626 switch ((c->x86 << 8) + c->x86_model) {
627 case 0x60f: /* original 65 nm celeron/pentium/core2/xeon, "Merom"/"Conroe" */
628 case 0x616: /* single-core 65 nm celeron/core2solo "Merom-L"/"Conroe-L" */
629 case 0x617: /* current 45 nm celeron/core2/xeon "Penryn"/"Wolfdale" */
630 case 0x61d: /* six-core 45 nm xeon "Dunnington" */
631 tlb_flushall_shift = -1;
633 case 0x61a: /* 45 nm nehalem, "Bloomfield" */
634 case 0x61e: /* 45 nm nehalem, "Lynnfield" */
635 case 0x625: /* 32 nm nehalem, "Clarkdale" */
636 case 0x62c: /* 32 nm nehalem, "Gulftown" */
637 case 0x62e: /* 45 nm nehalem-ex, "Beckton" */
638 case 0x62f: /* 32 nm Xeon E7 */
639 tlb_flushall_shift = 6;
641 case 0x62a: /* SandyBridge */
642 case 0x62d: /* SandyBridge, "Romely-EP" */
643 tlb_flushall_shift = 5;
645 case 0x63a: /* Ivybridge */
646 tlb_flushall_shift = 1;
649 tlb_flushall_shift = 6;
653 static void __cpuinit intel_detect_tlb(struct cpuinfo_x86 *c)
656 unsigned int regs[4];
657 unsigned char *desc = (unsigned char *)regs;
659 if (c->cpuid_level < 2)
662 /* Number of times to iterate */
663 n = cpuid_eax(2) & 0xFF;
665 for (i = 0 ; i < n ; i++) {
666 cpuid(2, ®s[0], ®s[1], ®s[2], ®s[3]);
668 /* If bit 31 is set, this is an unknown format */
669 for (j = 0 ; j < 3 ; j++)
670 if (regs[j] & (1 << 31))
673 /* Byte 0 is level count, not a descriptor */
674 for (j = 1 ; j < 16 ; j++)
675 intel_tlb_lookup(desc[j]);
677 intel_tlb_flushall_shift_set(c);
680 static const struct cpu_dev __cpuinitconst intel_cpu_dev = {
682 .c_ident = { "GenuineIntel" },
685 { .vendor = X86_VENDOR_INTEL, .family = 4, .model_names =
687 [0] = "486 DX-25/33",
698 { .vendor = X86_VENDOR_INTEL, .family = 5, .model_names =
700 [0] = "Pentium 60/66 A-step",
701 [1] = "Pentium 60/66",
702 [2] = "Pentium 75 - 200",
703 [3] = "OverDrive PODP5V83",
705 [7] = "Mobile Pentium 75 - 200",
706 [8] = "Mobile Pentium MMX"
709 { .vendor = X86_VENDOR_INTEL, .family = 6, .model_names =
711 [0] = "Pentium Pro A-step",
713 [3] = "Pentium II (Klamath)",
714 [4] = "Pentium II (Deschutes)",
715 [5] = "Pentium II (Deschutes)",
716 [6] = "Mobile Pentium II",
717 [7] = "Pentium III (Katmai)",
718 [8] = "Pentium III (Coppermine)",
719 [10] = "Pentium III (Cascades)",
720 [11] = "Pentium III (Tualatin)",
723 { .vendor = X86_VENDOR_INTEL, .family = 15, .model_names =
725 [0] = "Pentium 4 (Unknown)",
726 [1] = "Pentium 4 (Willamette)",
727 [2] = "Pentium 4 (Northwood)",
728 [4] = "Pentium 4 (Foster)",
729 [5] = "Pentium 4 (Foster)",
733 .c_size_cache = intel_size_cache,
735 .c_detect_tlb = intel_detect_tlb,
736 .c_early_init = early_init_intel,
737 .c_init = init_intel,
738 .c_x86_vendor = X86_VENDOR_INTEL,
741 cpu_dev_register(intel_cpu_dev);