1 #include <linux/kernel.h>
3 #include <linux/string.h>
4 #include <linux/bitops.h>
6 #include <linux/sched.h>
7 #include <linux/thread_info.h>
8 #include <linux/module.h>
9 #include <linux/uaccess.h>
11 #include <asm/processor.h>
12 #include <asm/pgtable.h>
18 #include <linux/topology.h>
23 #ifdef CONFIG_X86_LOCAL_APIC
24 #include <asm/mpspec.h>
28 static void early_init_intel(struct cpuinfo_x86 *c)
32 /* Unmask CPUID levels if masked: */
33 if (c->x86 > 6 || (c->x86 == 6 && c->x86_model >= 0xd)) {
34 rdmsrl(MSR_IA32_MISC_ENABLE, misc_enable);
36 if (misc_enable & MSR_IA32_MISC_ENABLE_LIMIT_CPUID) {
37 misc_enable &= ~MSR_IA32_MISC_ENABLE_LIMIT_CPUID;
38 wrmsrl(MSR_IA32_MISC_ENABLE, misc_enable);
39 c->cpuid_level = cpuid_eax(0);
44 if ((c->x86 == 0xf && c->x86_model >= 0x03) ||
45 (c->x86 == 0x6 && c->x86_model >= 0x0e))
46 set_cpu_cap(c, X86_FEATURE_CONSTANT_TSC);
48 if (c->x86 >= 6 && !cpu_has(c, X86_FEATURE_IA64)) {
51 wrmsr(MSR_IA32_UCODE_REV, 0, 0);
52 /* Required by the SDM */
54 rdmsr(MSR_IA32_UCODE_REV, lower_word, c->microcode);
58 * Atom erratum AAE44/AAF40/AAG38/AAH41:
60 * A race condition between speculative fetches and invalidating
61 * a large page. This is worked around in microcode, but we
62 * need the microcode to have already been loaded... so if it is
63 * not, recommend a BIOS update and disable large pages.
65 if (c->x86 == 6 && c->x86_model == 0x1c && c->x86_mask <= 2 &&
66 c->microcode < 0x20e) {
67 printk(KERN_WARNING "Atom PSE erratum detected, BIOS microcode update recommended\n");
68 clear_cpu_cap(c, X86_FEATURE_PSE);
72 set_cpu_cap(c, X86_FEATURE_SYSENTER32);
74 /* Netburst reports 64 bytes clflush size, but does IO in 128 bytes */
75 if (c->x86 == 15 && c->x86_cache_alignment == 64)
76 c->x86_cache_alignment = 128;
79 /* CPUID workaround for 0F33/0F34 CPU */
80 if (c->x86 == 0xF && c->x86_model == 0x3
81 && (c->x86_mask == 0x3 || c->x86_mask == 0x4))
82 c->x86_phys_bits = 36;
85 * c->x86_power is 8000_0007 edx. Bit 8 is TSC runs at constant rate
86 * with P/T states and does not stop in deep C-states.
88 * It is also reliable across cores and sockets. (but not across
89 * cabinets - we turn it off in that case explicitly.)
91 if (c->x86_power & (1 << 8)) {
92 set_cpu_cap(c, X86_FEATURE_CONSTANT_TSC);
93 set_cpu_cap(c, X86_FEATURE_NONSTOP_TSC);
94 if (!check_tsc_unstable())
95 set_sched_clock_stable();
98 /* Penwell and Cloverview have the TSC which doesn't sleep on S3 */
100 switch (c->x86_model) {
101 case 0x27: /* Penwell */
102 case 0x35: /* Cloverview */
103 set_cpu_cap(c, X86_FEATURE_NONSTOP_TSC_S3);
111 * There is a known erratum on Pentium III and Core Solo
113 * " Page with PAT set to WC while associated MTRR is UC
114 * may consolidate to UC "
115 * Because of this erratum, it is better to stick with
116 * setting WC in MTRR rather than using PAT on these CPUs.
118 * Enable PAT WC only on P4, Core 2 or later CPUs.
120 if (c->x86 == 6 && c->x86_model < 15)
121 clear_cpu_cap(c, X86_FEATURE_PAT);
123 #ifdef CONFIG_KMEMCHECK
125 * P4s have a "fast strings" feature which causes single-
126 * stepping REP instructions to only generate a #DB on
127 * cache-line boundaries.
129 * Ingo Molnar reported a Pentium D (model 6) and a Xeon
130 * (model 2) with the same problem.
133 rdmsrl(MSR_IA32_MISC_ENABLE, misc_enable);
135 if (misc_enable & MSR_IA32_MISC_ENABLE_FAST_STRING) {
136 printk(KERN_INFO "kmemcheck: Disabling fast string operations\n");
138 misc_enable &= ~MSR_IA32_MISC_ENABLE_FAST_STRING;
139 wrmsrl(MSR_IA32_MISC_ENABLE, misc_enable);
145 * If fast string is not enabled in IA32_MISC_ENABLE for any reason,
146 * clear the fast string and enhanced fast string CPU capabilities.
148 if (c->x86 > 6 || (c->x86 == 6 && c->x86_model >= 0xd)) {
149 rdmsrl(MSR_IA32_MISC_ENABLE, misc_enable);
150 if (!(misc_enable & MSR_IA32_MISC_ENABLE_FAST_STRING)) {
151 printk(KERN_INFO "Disabled fast string operations\n");
152 setup_clear_cpu_cap(X86_FEATURE_REP_GOOD);
153 setup_clear_cpu_cap(X86_FEATURE_ERMS);
160 * Early probe support logic for ppro memory erratum #50
162 * This is called before we do cpu ident work
165 int ppro_with_ram_bug(void)
167 /* Uses data from early_cpu_detect now */
168 if (boot_cpu_data.x86_vendor == X86_VENDOR_INTEL &&
169 boot_cpu_data.x86 == 6 &&
170 boot_cpu_data.x86_model == 1 &&
171 boot_cpu_data.x86_mask < 8) {
172 printk(KERN_INFO "Pentium Pro with Errata#50 detected. Taking evasive action.\n");
178 static void intel_smp_check(struct cpuinfo_x86 *c)
180 /* calling is from identify_secondary_cpu() ? */
185 * Mask B, Pentium, but not Pentium MMX
188 c->x86_mask >= 1 && c->x86_mask <= 4 &&
191 * Remember we have B step Pentia with bugs
193 WARN_ONCE(1, "WARNING: SMP operation may be unreliable"
194 "with B stepping processors.\n");
198 static void intel_workarounds(struct cpuinfo_x86 *c)
200 unsigned long lo, hi;
202 #ifdef CONFIG_X86_F00F_BUG
204 * All current models of Pentium and Pentium with MMX technology CPUs
205 * have the F0 0F bug, which lets nonprivileged users lock up the
206 * system. Announce that the fault handler will be checking for it.
208 clear_cpu_bug(c, X86_BUG_F00F);
209 if (!paravirt_enabled() && c->x86 == 5) {
210 static int f00f_workaround_enabled;
212 set_cpu_bug(c, X86_BUG_F00F);
213 if (!f00f_workaround_enabled) {
214 printk(KERN_NOTICE "Intel Pentium with F0 0F bug - workaround enabled.\n");
215 f00f_workaround_enabled = 1;
221 * SEP CPUID bug: Pentium Pro reports SEP but doesn't have it until
224 if ((c->x86<<8 | c->x86_model<<4 | c->x86_mask) < 0x633)
225 clear_cpu_cap(c, X86_FEATURE_SEP);
228 * P4 Xeon errata 037 workaround.
229 * Hardware prefetcher may cause stale data to be loaded into the cache.
231 if ((c->x86 == 15) && (c->x86_model == 1) && (c->x86_mask == 1)) {
232 rdmsr(MSR_IA32_MISC_ENABLE, lo, hi);
233 if ((lo & MSR_IA32_MISC_ENABLE_PREFETCH_DISABLE) == 0) {
234 printk (KERN_INFO "CPU: C0 stepping P4 Xeon detected.\n");
235 printk (KERN_INFO "CPU: Disabling hardware prefetching (Errata 037)\n");
236 lo |= MSR_IA32_MISC_ENABLE_PREFETCH_DISABLE;
237 wrmsr(MSR_IA32_MISC_ENABLE, lo, hi);
242 * See if we have a good local APIC by checking for buggy Pentia,
243 * i.e. all B steppings and the C2 stepping of P54C when using their
244 * integrated APIC (see 11AP erratum in "Pentium Processor
245 * Specification Update").
247 if (cpu_has_apic && (c->x86<<8 | c->x86_model<<4) == 0x520 &&
248 (c->x86_mask < 0x6 || c->x86_mask == 0xb))
249 set_cpu_cap(c, X86_FEATURE_11AP);
252 #ifdef CONFIG_X86_INTEL_USERCOPY
254 * Set up the preferred alignment for movsl bulk memory moves
257 case 4: /* 486: untested */
259 case 5: /* Old Pentia: untested */
261 case 6: /* PII/PIII only like movsl with 8-byte alignment */
264 case 15: /* P4 is OK down to 8-byte alignment */
270 #ifdef CONFIG_X86_NUMAQ
277 static void intel_workarounds(struct cpuinfo_x86 *c)
282 static void srat_detect_node(struct cpuinfo_x86 *c)
286 int cpu = smp_processor_id();
288 /* Don't do the funky fallback heuristics the AMD version employs
290 node = numa_cpu_node(cpu);
291 if (node == NUMA_NO_NODE || !node_online(node)) {
292 /* reuse the value from init_cpu_to_node() */
293 node = cpu_to_node(cpu);
295 numa_set_node(cpu, node);
300 * find out the number of processor cores on the die
302 static int intel_num_cpu_cores(struct cpuinfo_x86 *c)
304 unsigned int eax, ebx, ecx, edx;
306 if (c->cpuid_level < 4)
309 /* Intel has a non-standard dependency on %ecx for this CPUID level. */
310 cpuid_count(4, 0, &eax, &ebx, &ecx, &edx);
312 return (eax >> 26) + 1;
317 static void detect_vmx_virtcap(struct cpuinfo_x86 *c)
319 /* Intel VMX MSR indicated features */
320 #define X86_VMX_FEATURE_PROC_CTLS_TPR_SHADOW 0x00200000
321 #define X86_VMX_FEATURE_PROC_CTLS_VNMI 0x00400000
322 #define X86_VMX_FEATURE_PROC_CTLS_2ND_CTLS 0x80000000
323 #define X86_VMX_FEATURE_PROC_CTLS2_VIRT_APIC 0x00000001
324 #define X86_VMX_FEATURE_PROC_CTLS2_EPT 0x00000002
325 #define X86_VMX_FEATURE_PROC_CTLS2_VPID 0x00000020
327 u32 vmx_msr_low, vmx_msr_high, msr_ctl, msr_ctl2;
329 clear_cpu_cap(c, X86_FEATURE_TPR_SHADOW);
330 clear_cpu_cap(c, X86_FEATURE_VNMI);
331 clear_cpu_cap(c, X86_FEATURE_FLEXPRIORITY);
332 clear_cpu_cap(c, X86_FEATURE_EPT);
333 clear_cpu_cap(c, X86_FEATURE_VPID);
335 rdmsr(MSR_IA32_VMX_PROCBASED_CTLS, vmx_msr_low, vmx_msr_high);
336 msr_ctl = vmx_msr_high | vmx_msr_low;
337 if (msr_ctl & X86_VMX_FEATURE_PROC_CTLS_TPR_SHADOW)
338 set_cpu_cap(c, X86_FEATURE_TPR_SHADOW);
339 if (msr_ctl & X86_VMX_FEATURE_PROC_CTLS_VNMI)
340 set_cpu_cap(c, X86_FEATURE_VNMI);
341 if (msr_ctl & X86_VMX_FEATURE_PROC_CTLS_2ND_CTLS) {
342 rdmsr(MSR_IA32_VMX_PROCBASED_CTLS2,
343 vmx_msr_low, vmx_msr_high);
344 msr_ctl2 = vmx_msr_high | vmx_msr_low;
345 if ((msr_ctl2 & X86_VMX_FEATURE_PROC_CTLS2_VIRT_APIC) &&
346 (msr_ctl & X86_VMX_FEATURE_PROC_CTLS_TPR_SHADOW))
347 set_cpu_cap(c, X86_FEATURE_FLEXPRIORITY);
348 if (msr_ctl2 & X86_VMX_FEATURE_PROC_CTLS2_EPT)
349 set_cpu_cap(c, X86_FEATURE_EPT);
350 if (msr_ctl2 & X86_VMX_FEATURE_PROC_CTLS2_VPID)
351 set_cpu_cap(c, X86_FEATURE_VPID);
355 static void init_intel(struct cpuinfo_x86 *c)
361 intel_workarounds(c);
364 * Detect the extended topology information if available. This
365 * will reinitialise the initial_apicid which will be used
366 * in init_intel_cacheinfo()
368 detect_extended_topology(c);
370 l2 = init_intel_cacheinfo(c);
371 if (c->cpuid_level > 9) {
372 unsigned eax = cpuid_eax(10);
373 /* Check for version and the number of counters */
374 if ((eax & 0xff) && (((eax>>8) & 0xff) > 1))
375 set_cpu_cap(c, X86_FEATURE_ARCH_PERFMON);
379 set_cpu_cap(c, X86_FEATURE_LFENCE_RDTSC);
382 rdmsr(MSR_IA32_MISC_ENABLE, l1, l2);
384 set_cpu_cap(c, X86_FEATURE_BTS);
386 set_cpu_cap(c, X86_FEATURE_PEBS);
389 if (c->x86 == 6 && cpu_has_clflush &&
390 (c->x86_model == 29 || c->x86_model == 46 || c->x86_model == 47))
391 set_cpu_cap(c, X86_FEATURE_CLFLUSH_MONITOR);
395 c->x86_cache_alignment = c->x86_clflush_size * 2;
397 set_cpu_cap(c, X86_FEATURE_REP_GOOD);
400 * Names for the Pentium II/Celeron processors
401 * detectable only by also checking the cache size.
402 * Dixon is NOT a Celeron.
407 switch (c->x86_model) {
410 p = "Celeron (Covington)";
412 p = "Mobile Pentium II (Dixon)";
417 p = "Celeron (Mendocino)";
418 else if (c->x86_mask == 0 || c->x86_mask == 5)
424 p = "Celeron (Coppermine)";
429 strcpy(c->x86_model_id, p);
433 set_cpu_cap(c, X86_FEATURE_P4);
435 set_cpu_cap(c, X86_FEATURE_P3);
438 if (!cpu_has(c, X86_FEATURE_XTOPOLOGY)) {
440 * let's use the legacy cpuid vector 0x1 and 0x4 for topology
443 c->x86_max_cores = intel_num_cpu_cores(c);
449 /* Work around errata */
452 if (cpu_has(c, X86_FEATURE_VMX))
453 detect_vmx_virtcap(c);
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
459 if (cpu_has(c, X86_FEATURE_EPB)) {
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);
475 static unsigned int intel_size_cache(struct cpuinfo_x86 *c, unsigned int size)
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.
483 if ((c->x86 == 6) && (c->x86_model == 11) && (size == 0))
489 #define TLB_INST_4K 0x01
490 #define TLB_INST_4M 0x02
491 #define TLB_INST_2M_4M 0x03
493 #define TLB_INST_ALL 0x05
494 #define TLB_INST_1G 0x06
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
501 #define TLB_DATA_1G 0x16
503 #define TLB_DATA0_4K 0x21
504 #define TLB_DATA0_4M 0x22
505 #define TLB_DATA0_2M_4M 0x23
508 #define STLB_4K_2M 0x42
510 static const struct _tlb_table intel_tlb_table[] = {
511 { 0x01, TLB_INST_4K, 32, " TLB_INST 4 KByte pages, 4-way set associative" },
512 { 0x02, TLB_INST_4M, 2, " TLB_INST 4 MByte pages, full associative" },
513 { 0x03, TLB_DATA_4K, 64, " TLB_DATA 4 KByte pages, 4-way set associative" },
514 { 0x04, TLB_DATA_4M, 8, " TLB_DATA 4 MByte pages, 4-way set associative" },
515 { 0x05, TLB_DATA_4M, 32, " TLB_DATA 4 MByte pages, 4-way set associative" },
516 { 0x0b, TLB_INST_4M, 4, " TLB_INST 4 MByte pages, 4-way set associative" },
517 { 0x4f, TLB_INST_4K, 32, " TLB_INST 4 KByte pages */" },
518 { 0x50, TLB_INST_ALL, 64, " TLB_INST 4 KByte and 2-MByte or 4-MByte pages" },
519 { 0x51, TLB_INST_ALL, 128, " TLB_INST 4 KByte and 2-MByte or 4-MByte pages" },
520 { 0x52, TLB_INST_ALL, 256, " TLB_INST 4 KByte and 2-MByte or 4-MByte pages" },
521 { 0x55, TLB_INST_2M_4M, 7, " TLB_INST 2-MByte or 4-MByte pages, fully associative" },
522 { 0x56, TLB_DATA0_4M, 16, " TLB_DATA0 4 MByte pages, 4-way set associative" },
523 { 0x57, TLB_DATA0_4K, 16, " TLB_DATA0 4 KByte pages, 4-way associative" },
524 { 0x59, TLB_DATA0_4K, 16, " TLB_DATA0 4 KByte pages, fully associative" },
525 { 0x5a, TLB_DATA0_2M_4M, 32, " TLB_DATA0 2-MByte or 4 MByte pages, 4-way set associative" },
526 { 0x5b, TLB_DATA_4K_4M, 64, " TLB_DATA 4 KByte and 4 MByte pages" },
527 { 0x5c, TLB_DATA_4K_4M, 128, " TLB_DATA 4 KByte and 4 MByte pages" },
528 { 0x5d, TLB_DATA_4K_4M, 256, " TLB_DATA 4 KByte and 4 MByte pages" },
529 { 0x61, TLB_INST_4K, 48, " TLB_INST 4 KByte pages, full associative" },
530 { 0x63, TLB_DATA_1G, 4, " TLB_DATA 1 GByte pages, 4-way set associative" },
531 { 0x76, TLB_INST_2M_4M, 8, " TLB_INST 2-MByte or 4-MByte pages, fully associative" },
532 { 0xb0, TLB_INST_4K, 128, " TLB_INST 4 KByte pages, 4-way set associative" },
533 { 0xb1, TLB_INST_2M_4M, 4, " TLB_INST 2M pages, 4-way, 8 entries or 4M pages, 4-way entries" },
534 { 0xb2, TLB_INST_4K, 64, " TLB_INST 4KByte pages, 4-way set associative" },
535 { 0xb3, TLB_DATA_4K, 128, " TLB_DATA 4 KByte pages, 4-way set associative" },
536 { 0xb4, TLB_DATA_4K, 256, " TLB_DATA 4 KByte pages, 4-way associative" },
537 { 0xb5, TLB_INST_4K, 64, " TLB_INST 4 KByte pages, 8-way set ssociative" },
538 { 0xb6, TLB_INST_4K, 128, " TLB_INST 4 KByte pages, 8-way set ssociative" },
539 { 0xba, TLB_DATA_4K, 64, " TLB_DATA 4 KByte pages, 4-way associative" },
540 { 0xc0, TLB_DATA_4K_4M, 8, " TLB_DATA 4 KByte and 4 MByte pages, 4-way associative" },
541 { 0xc1, STLB_4K_2M, 1024, " STLB 4 KByte and 2 MByte pages, 8-way associative" },
542 { 0xc2, TLB_DATA_2M_4M, 16, " DTLB 2 MByte/4MByte pages, 4-way associative" },
543 { 0xca, STLB_4K, 512, " STLB 4 KByte pages, 4-way associative" },
547 static void intel_tlb_lookup(const unsigned char desc)
553 /* look up this descriptor in the table */
554 for (k = 0; intel_tlb_table[k].descriptor != desc && \
555 intel_tlb_table[k].descriptor != 0; k++)
558 if (intel_tlb_table[k].tlb_type == 0)
561 switch (intel_tlb_table[k].tlb_type) {
563 if (tlb_lli_4k[ENTRIES] < intel_tlb_table[k].entries)
564 tlb_lli_4k[ENTRIES] = intel_tlb_table[k].entries;
565 if (tlb_lld_4k[ENTRIES] < intel_tlb_table[k].entries)
566 tlb_lld_4k[ENTRIES] = intel_tlb_table[k].entries;
569 if (tlb_lli_4k[ENTRIES] < intel_tlb_table[k].entries)
570 tlb_lli_4k[ENTRIES] = intel_tlb_table[k].entries;
571 if (tlb_lld_4k[ENTRIES] < intel_tlb_table[k].entries)
572 tlb_lld_4k[ENTRIES] = intel_tlb_table[k].entries;
573 if (tlb_lli_2m[ENTRIES] < intel_tlb_table[k].entries)
574 tlb_lli_2m[ENTRIES] = intel_tlb_table[k].entries;
575 if (tlb_lld_2m[ENTRIES] < intel_tlb_table[k].entries)
576 tlb_lld_2m[ENTRIES] = intel_tlb_table[k].entries;
577 if (tlb_lli_4m[ENTRIES] < intel_tlb_table[k].entries)
578 tlb_lli_4m[ENTRIES] = intel_tlb_table[k].entries;
579 if (tlb_lld_4m[ENTRIES] < intel_tlb_table[k].entries)
580 tlb_lld_4m[ENTRIES] = intel_tlb_table[k].entries;
583 if (tlb_lli_4k[ENTRIES] < intel_tlb_table[k].entries)
584 tlb_lli_4k[ENTRIES] = intel_tlb_table[k].entries;
585 if (tlb_lli_2m[ENTRIES] < intel_tlb_table[k].entries)
586 tlb_lli_2m[ENTRIES] = intel_tlb_table[k].entries;
587 if (tlb_lli_4m[ENTRIES] < intel_tlb_table[k].entries)
588 tlb_lli_4m[ENTRIES] = intel_tlb_table[k].entries;
591 if (tlb_lli_4k[ENTRIES] < intel_tlb_table[k].entries)
592 tlb_lli_4k[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;
599 if (tlb_lli_2m[ENTRIES] < intel_tlb_table[k].entries)
600 tlb_lli_2m[ENTRIES] = intel_tlb_table[k].entries;
601 if (tlb_lli_4m[ENTRIES] < intel_tlb_table[k].entries)
602 tlb_lli_4m[ENTRIES] = intel_tlb_table[k].entries;
606 if (tlb_lld_4k[ENTRIES] < intel_tlb_table[k].entries)
607 tlb_lld_4k[ENTRIES] = intel_tlb_table[k].entries;
611 if (tlb_lld_4m[ENTRIES] < intel_tlb_table[k].entries)
612 tlb_lld_4m[ENTRIES] = intel_tlb_table[k].entries;
615 case TLB_DATA0_2M_4M:
616 if (tlb_lld_2m[ENTRIES] < intel_tlb_table[k].entries)
617 tlb_lld_2m[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;
622 if (tlb_lld_4k[ENTRIES] < intel_tlb_table[k].entries)
623 tlb_lld_4k[ENTRIES] = intel_tlb_table[k].entries;
624 if (tlb_lld_4m[ENTRIES] < intel_tlb_table[k].entries)
625 tlb_lld_4m[ENTRIES] = intel_tlb_table[k].entries;
628 if (tlb_lld_1g[ENTRIES] < intel_tlb_table[k].entries)
629 tlb_lld_1g[ENTRIES] = intel_tlb_table[k].entries;
634 static void intel_tlb_flushall_shift_set(struct cpuinfo_x86 *c)
636 switch ((c->x86 << 8) + c->x86_model) {
637 case 0x60f: /* original 65 nm celeron/pentium/core2/xeon, "Merom"/"Conroe" */
638 case 0x616: /* single-core 65 nm celeron/core2solo "Merom-L"/"Conroe-L" */
639 case 0x617: /* current 45 nm celeron/core2/xeon "Penryn"/"Wolfdale" */
640 case 0x61d: /* six-core 45 nm xeon "Dunnington" */
641 tlb_flushall_shift = -1;
643 case 0x63a: /* Ivybridge */
644 tlb_flushall_shift = 2;
646 case 0x61a: /* 45 nm nehalem, "Bloomfield" */
647 case 0x61e: /* 45 nm nehalem, "Lynnfield" */
648 case 0x625: /* 32 nm nehalem, "Clarkdale" */
649 case 0x62c: /* 32 nm nehalem, "Gulftown" */
650 case 0x62e: /* 45 nm nehalem-ex, "Beckton" */
651 case 0x62f: /* 32 nm Xeon E7 */
652 case 0x62a: /* SandyBridge */
653 case 0x62d: /* SandyBridge, "Romely-EP" */
655 tlb_flushall_shift = 6;
659 static void intel_detect_tlb(struct cpuinfo_x86 *c)
662 unsigned int regs[4];
663 unsigned char *desc = (unsigned char *)regs;
665 if (c->cpuid_level < 2)
668 /* Number of times to iterate */
669 n = cpuid_eax(2) & 0xFF;
671 for (i = 0 ; i < n ; i++) {
672 cpuid(2, ®s[0], ®s[1], ®s[2], ®s[3]);
674 /* If bit 31 is set, this is an unknown format */
675 for (j = 0 ; j < 3 ; j++)
676 if (regs[j] & (1 << 31))
679 /* Byte 0 is level count, not a descriptor */
680 for (j = 1 ; j < 16 ; j++)
681 intel_tlb_lookup(desc[j]);
683 intel_tlb_flushall_shift_set(c);
686 static const struct cpu_dev intel_cpu_dev = {
688 .c_ident = { "GenuineIntel" },
691 { .family = 4, .model_names =
693 [0] = "486 DX-25/33",
704 { .family = 5, .model_names =
706 [0] = "Pentium 60/66 A-step",
707 [1] = "Pentium 60/66",
708 [2] = "Pentium 75 - 200",
709 [3] = "OverDrive PODP5V83",
711 [7] = "Mobile Pentium 75 - 200",
712 [8] = "Mobile Pentium MMX"
715 { .family = 6, .model_names =
717 [0] = "Pentium Pro A-step",
719 [3] = "Pentium II (Klamath)",
720 [4] = "Pentium II (Deschutes)",
721 [5] = "Pentium II (Deschutes)",
722 [6] = "Mobile Pentium II",
723 [7] = "Pentium III (Katmai)",
724 [8] = "Pentium III (Coppermine)",
725 [10] = "Pentium III (Cascades)",
726 [11] = "Pentium III (Tualatin)",
729 { .family = 15, .model_names =
731 [0] = "Pentium 4 (Unknown)",
732 [1] = "Pentium 4 (Willamette)",
733 [2] = "Pentium 4 (Northwood)",
734 [4] = "Pentium 4 (Foster)",
735 [5] = "Pentium 4 (Foster)",
739 .legacy_cache_size = intel_size_cache,
741 .c_detect_tlb = intel_detect_tlb,
742 .c_early_init = early_init_intel,
743 .c_init = init_intel,
744 .c_x86_vendor = X86_VENDOR_INTEL,
747 cpu_dev_register(intel_cpu_dev);