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);
158 * Intel Quark Core DevMan_001.pdf section 6.4.11
159 * "The operating system also is required to invalidate (i.e., flush)
160 * the TLB when any changes are made to any of the page table entries.
161 * The operating system must reload CR3 to cause the TLB to be flushed"
163 * As a result cpu_has_pge() in arch/x86/include/asm/tlbflush.h should
164 * be false so that __flush_tlb_all() causes CR3 insted of CR4.PGE
167 if (c->x86 == 5 && c->x86_model == 9) {
168 pr_info("Disabling PGE capability bit\n");
169 setup_clear_cpu_cap(X86_FEATURE_PGE);
175 * Early probe support logic for ppro memory erratum #50
177 * This is called before we do cpu ident work
180 int ppro_with_ram_bug(void)
182 /* Uses data from early_cpu_detect now */
183 if (boot_cpu_data.x86_vendor == X86_VENDOR_INTEL &&
184 boot_cpu_data.x86 == 6 &&
185 boot_cpu_data.x86_model == 1 &&
186 boot_cpu_data.x86_mask < 8) {
187 printk(KERN_INFO "Pentium Pro with Errata#50 detected. Taking evasive action.\n");
193 static void 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 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
221 * system. Announce that the fault handler will be checking for it.
223 clear_cpu_bug(c, X86_BUG_F00F);
224 if (!paravirt_enabled() && c->x86 == 5) {
225 static int f00f_workaround_enabled;
227 set_cpu_bug(c, X86_BUG_F00F);
228 if (!f00f_workaround_enabled) {
229 printk(KERN_NOTICE "Intel Pentium with F0 0F bug - workaround enabled.\n");
230 f00f_workaround_enabled = 1;
236 * SEP CPUID bug: Pentium Pro reports SEP but doesn't have it until
239 if ((c->x86<<8 | c->x86_model<<4 | c->x86_mask) < 0x633)
240 clear_cpu_cap(c, X86_FEATURE_SEP);
243 * P4 Xeon errata 037 workaround.
244 * Hardware prefetcher may cause stale data to be loaded into the cache.
246 if ((c->x86 == 15) && (c->x86_model == 1) && (c->x86_mask == 1)) {
247 rdmsr(MSR_IA32_MISC_ENABLE, lo, hi);
248 if ((lo & MSR_IA32_MISC_ENABLE_PREFETCH_DISABLE) == 0) {
249 printk (KERN_INFO "CPU: C0 stepping P4 Xeon detected.\n");
250 printk (KERN_INFO "CPU: Disabling hardware prefetching (Errata 037)\n");
251 lo |= MSR_IA32_MISC_ENABLE_PREFETCH_DISABLE;
252 wrmsr(MSR_IA32_MISC_ENABLE, lo, hi);
257 * See if we have a good local APIC by checking for buggy Pentia,
258 * i.e. all B steppings and the C2 stepping of P54C when using their
259 * integrated APIC (see 11AP erratum in "Pentium Processor
260 * Specification Update").
262 if (cpu_has_apic && (c->x86<<8 | c->x86_model<<4) == 0x520 &&
263 (c->x86_mask < 0x6 || c->x86_mask == 0xb))
264 set_cpu_cap(c, X86_FEATURE_11AP);
267 #ifdef CONFIG_X86_INTEL_USERCOPY
269 * Set up the preferred alignment for movsl bulk memory moves
272 case 4: /* 486: untested */
274 case 5: /* Old Pentia: untested */
276 case 6: /* PII/PIII only like movsl with 8-byte alignment */
279 case 15: /* P4 is OK down to 8-byte alignment */
285 #ifdef CONFIG_X86_NUMAQ
292 static void intel_workarounds(struct cpuinfo_x86 *c)
297 static void srat_detect_node(struct cpuinfo_x86 *c)
301 int cpu = smp_processor_id();
303 /* Don't do the funky fallback heuristics the AMD version employs
305 node = numa_cpu_node(cpu);
306 if (node == NUMA_NO_NODE || !node_online(node)) {
307 /* reuse the value from init_cpu_to_node() */
308 node = cpu_to_node(cpu);
310 numa_set_node(cpu, node);
315 * find out the number of processor cores on the die
317 static int intel_num_cpu_cores(struct cpuinfo_x86 *c)
319 unsigned int eax, ebx, ecx, edx;
321 if (c->cpuid_level < 4)
324 /* Intel has a non-standard dependency on %ecx for this CPUID level. */
325 cpuid_count(4, 0, &eax, &ebx, &ecx, &edx);
327 return (eax >> 26) + 1;
332 static void detect_vmx_virtcap(struct cpuinfo_x86 *c)
334 /* Intel VMX MSR indicated features */
335 #define X86_VMX_FEATURE_PROC_CTLS_TPR_SHADOW 0x00200000
336 #define X86_VMX_FEATURE_PROC_CTLS_VNMI 0x00400000
337 #define X86_VMX_FEATURE_PROC_CTLS_2ND_CTLS 0x80000000
338 #define X86_VMX_FEATURE_PROC_CTLS2_VIRT_APIC 0x00000001
339 #define X86_VMX_FEATURE_PROC_CTLS2_EPT 0x00000002
340 #define X86_VMX_FEATURE_PROC_CTLS2_VPID 0x00000020
342 u32 vmx_msr_low, vmx_msr_high, msr_ctl, msr_ctl2;
344 clear_cpu_cap(c, X86_FEATURE_TPR_SHADOW);
345 clear_cpu_cap(c, X86_FEATURE_VNMI);
346 clear_cpu_cap(c, X86_FEATURE_FLEXPRIORITY);
347 clear_cpu_cap(c, X86_FEATURE_EPT);
348 clear_cpu_cap(c, X86_FEATURE_VPID);
350 rdmsr(MSR_IA32_VMX_PROCBASED_CTLS, vmx_msr_low, vmx_msr_high);
351 msr_ctl = vmx_msr_high | vmx_msr_low;
352 if (msr_ctl & X86_VMX_FEATURE_PROC_CTLS_TPR_SHADOW)
353 set_cpu_cap(c, X86_FEATURE_TPR_SHADOW);
354 if (msr_ctl & X86_VMX_FEATURE_PROC_CTLS_VNMI)
355 set_cpu_cap(c, X86_FEATURE_VNMI);
356 if (msr_ctl & X86_VMX_FEATURE_PROC_CTLS_2ND_CTLS) {
357 rdmsr(MSR_IA32_VMX_PROCBASED_CTLS2,
358 vmx_msr_low, vmx_msr_high);
359 msr_ctl2 = vmx_msr_high | vmx_msr_low;
360 if ((msr_ctl2 & X86_VMX_FEATURE_PROC_CTLS2_VIRT_APIC) &&
361 (msr_ctl & X86_VMX_FEATURE_PROC_CTLS_TPR_SHADOW))
362 set_cpu_cap(c, X86_FEATURE_FLEXPRIORITY);
363 if (msr_ctl2 & X86_VMX_FEATURE_PROC_CTLS2_EPT)
364 set_cpu_cap(c, X86_FEATURE_EPT);
365 if (msr_ctl2 & X86_VMX_FEATURE_PROC_CTLS2_VPID)
366 set_cpu_cap(c, X86_FEATURE_VPID);
370 static void init_intel(struct cpuinfo_x86 *c)
376 intel_workarounds(c);
379 * Detect the extended topology information if available. This
380 * will reinitialise the initial_apicid which will be used
381 * in init_intel_cacheinfo()
383 detect_extended_topology(c);
385 l2 = init_intel_cacheinfo(c);
387 /* Detect legacy cache sizes if init_intel_cacheinfo did not */
389 cpu_detect_cache_sizes(c);
390 l2 = c->x86_cache_size;
393 if (c->cpuid_level > 9) {
394 unsigned eax = cpuid_eax(10);
395 /* Check for version and the number of counters */
396 if ((eax & 0xff) && (((eax>>8) & 0xff) > 1))
397 set_cpu_cap(c, X86_FEATURE_ARCH_PERFMON);
401 set_cpu_cap(c, X86_FEATURE_LFENCE_RDTSC);
404 rdmsr(MSR_IA32_MISC_ENABLE, l1, l2);
406 set_cpu_cap(c, X86_FEATURE_BTS);
408 set_cpu_cap(c, X86_FEATURE_PEBS);
411 if (c->x86 == 6 && cpu_has_clflush &&
412 (c->x86_model == 29 || c->x86_model == 46 || c->x86_model == 47))
413 set_cpu_cap(c, X86_FEATURE_CLFLUSH_MONITOR);
417 c->x86_cache_alignment = c->x86_clflush_size * 2;
419 set_cpu_cap(c, X86_FEATURE_REP_GOOD);
422 * Names for the Pentium II/Celeron processors
423 * detectable only by also checking the cache size.
424 * Dixon is NOT a Celeron.
429 switch (c->x86_model) {
432 p = "Celeron (Covington)";
434 p = "Mobile Pentium II (Dixon)";
439 p = "Celeron (Mendocino)";
440 else if (c->x86_mask == 0 || c->x86_mask == 5)
446 p = "Celeron (Coppermine)";
451 strcpy(c->x86_model_id, p);
455 set_cpu_cap(c, X86_FEATURE_P4);
457 set_cpu_cap(c, X86_FEATURE_P3);
460 if (!cpu_has(c, X86_FEATURE_XTOPOLOGY)) {
462 * let's use the legacy cpuid vector 0x1 and 0x4 for topology
465 c->x86_max_cores = intel_num_cpu_cores(c);
471 /* Work around errata */
474 if (cpu_has(c, X86_FEATURE_VMX))
475 detect_vmx_virtcap(c);
478 * Initialize MSR_IA32_ENERGY_PERF_BIAS if BIOS did not.
479 * x86_energy_perf_policy(8) is available to change it at run-time
481 if (cpu_has(c, X86_FEATURE_EPB)) {
484 rdmsrl(MSR_IA32_ENERGY_PERF_BIAS, epb);
485 if ((epb & 0xF) == ENERGY_PERF_BIAS_PERFORMANCE) {
486 printk_once(KERN_WARNING "ENERGY_PERF_BIAS:"
487 " Set to 'normal', was 'performance'\n"
488 "ENERGY_PERF_BIAS: View and update with"
489 " x86_energy_perf_policy(8)\n");
490 epb = (epb & ~0xF) | ENERGY_PERF_BIAS_NORMAL;
491 wrmsrl(MSR_IA32_ENERGY_PERF_BIAS, epb);
497 static unsigned int intel_size_cache(struct cpuinfo_x86 *c, unsigned int size)
500 * Intel PIII Tualatin. This comes in two flavours.
501 * One has 256kb of cache, the other 512. We have no way
502 * to determine which, so we use a boottime override
503 * for the 512kb model, and assume 256 otherwise.
505 if ((c->x86 == 6) && (c->x86_model == 11) && (size == 0))
509 * Intel Quark SoC X1000 contains a 4-way set associative
510 * 16K cache with a 16 byte cache line and 256 lines per tag
512 if ((c->x86 == 5) && (c->x86_model == 9))
518 #define TLB_INST_4K 0x01
519 #define TLB_INST_4M 0x02
520 #define TLB_INST_2M_4M 0x03
522 #define TLB_INST_ALL 0x05
523 #define TLB_INST_1G 0x06
525 #define TLB_DATA_4K 0x11
526 #define TLB_DATA_4M 0x12
527 #define TLB_DATA_2M_4M 0x13
528 #define TLB_DATA_4K_4M 0x14
530 #define TLB_DATA_1G 0x16
532 #define TLB_DATA0_4K 0x21
533 #define TLB_DATA0_4M 0x22
534 #define TLB_DATA0_2M_4M 0x23
537 #define STLB_4K_2M 0x42
539 static const struct _tlb_table intel_tlb_table[] = {
540 { 0x01, TLB_INST_4K, 32, " TLB_INST 4 KByte pages, 4-way set associative" },
541 { 0x02, TLB_INST_4M, 2, " TLB_INST 4 MByte pages, full associative" },
542 { 0x03, TLB_DATA_4K, 64, " TLB_DATA 4 KByte pages, 4-way set associative" },
543 { 0x04, TLB_DATA_4M, 8, " TLB_DATA 4 MByte pages, 4-way set associative" },
544 { 0x05, TLB_DATA_4M, 32, " TLB_DATA 4 MByte pages, 4-way set associative" },
545 { 0x0b, TLB_INST_4M, 4, " TLB_INST 4 MByte pages, 4-way set associative" },
546 { 0x4f, TLB_INST_4K, 32, " TLB_INST 4 KByte pages */" },
547 { 0x50, TLB_INST_ALL, 64, " TLB_INST 4 KByte and 2-MByte or 4-MByte pages" },
548 { 0x51, TLB_INST_ALL, 128, " TLB_INST 4 KByte and 2-MByte or 4-MByte pages" },
549 { 0x52, TLB_INST_ALL, 256, " TLB_INST 4 KByte and 2-MByte or 4-MByte pages" },
550 { 0x55, TLB_INST_2M_4M, 7, " TLB_INST 2-MByte or 4-MByte pages, fully associative" },
551 { 0x56, TLB_DATA0_4M, 16, " TLB_DATA0 4 MByte pages, 4-way set associative" },
552 { 0x57, TLB_DATA0_4K, 16, " TLB_DATA0 4 KByte pages, 4-way associative" },
553 { 0x59, TLB_DATA0_4K, 16, " TLB_DATA0 4 KByte pages, fully associative" },
554 { 0x5a, TLB_DATA0_2M_4M, 32, " TLB_DATA0 2-MByte or 4 MByte pages, 4-way set associative" },
555 { 0x5b, TLB_DATA_4K_4M, 64, " TLB_DATA 4 KByte and 4 MByte pages" },
556 { 0x5c, TLB_DATA_4K_4M, 128, " TLB_DATA 4 KByte and 4 MByte pages" },
557 { 0x5d, TLB_DATA_4K_4M, 256, " TLB_DATA 4 KByte and 4 MByte pages" },
558 { 0x61, TLB_INST_4K, 48, " TLB_INST 4 KByte pages, full associative" },
559 { 0x63, TLB_DATA_1G, 4, " TLB_DATA 1 GByte pages, 4-way set associative" },
560 { 0x76, TLB_INST_2M_4M, 8, " TLB_INST 2-MByte or 4-MByte pages, fully associative" },
561 { 0xb0, TLB_INST_4K, 128, " TLB_INST 4 KByte pages, 4-way set associative" },
562 { 0xb1, TLB_INST_2M_4M, 4, " TLB_INST 2M pages, 4-way, 8 entries or 4M pages, 4-way entries" },
563 { 0xb2, TLB_INST_4K, 64, " TLB_INST 4KByte pages, 4-way set associative" },
564 { 0xb3, TLB_DATA_4K, 128, " TLB_DATA 4 KByte pages, 4-way set associative" },
565 { 0xb4, TLB_DATA_4K, 256, " TLB_DATA 4 KByte pages, 4-way associative" },
566 { 0xb5, TLB_INST_4K, 64, " TLB_INST 4 KByte pages, 8-way set ssociative" },
567 { 0xb6, TLB_INST_4K, 128, " TLB_INST 4 KByte pages, 8-way set ssociative" },
568 { 0xba, TLB_DATA_4K, 64, " TLB_DATA 4 KByte pages, 4-way associative" },
569 { 0xc0, TLB_DATA_4K_4M, 8, " TLB_DATA 4 KByte and 4 MByte pages, 4-way associative" },
570 { 0xc1, STLB_4K_2M, 1024, " STLB 4 KByte and 2 MByte pages, 8-way associative" },
571 { 0xc2, TLB_DATA_2M_4M, 16, " DTLB 2 MByte/4MByte pages, 4-way associative" },
572 { 0xca, STLB_4K, 512, " STLB 4 KByte pages, 4-way associative" },
576 static void intel_tlb_lookup(const unsigned char desc)
582 /* look up this descriptor in the table */
583 for (k = 0; intel_tlb_table[k].descriptor != desc && \
584 intel_tlb_table[k].descriptor != 0; k++)
587 if (intel_tlb_table[k].tlb_type == 0)
590 switch (intel_tlb_table[k].tlb_type) {
592 if (tlb_lli_4k[ENTRIES] < intel_tlb_table[k].entries)
593 tlb_lli_4k[ENTRIES] = intel_tlb_table[k].entries;
594 if (tlb_lld_4k[ENTRIES] < intel_tlb_table[k].entries)
595 tlb_lld_4k[ENTRIES] = intel_tlb_table[k].entries;
598 if (tlb_lli_4k[ENTRIES] < intel_tlb_table[k].entries)
599 tlb_lli_4k[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;
602 if (tlb_lli_2m[ENTRIES] < intel_tlb_table[k].entries)
603 tlb_lli_2m[ENTRIES] = intel_tlb_table[k].entries;
604 if (tlb_lld_2m[ENTRIES] < intel_tlb_table[k].entries)
605 tlb_lld_2m[ENTRIES] = intel_tlb_table[k].entries;
606 if (tlb_lli_4m[ENTRIES] < intel_tlb_table[k].entries)
607 tlb_lli_4m[ENTRIES] = intel_tlb_table[k].entries;
608 if (tlb_lld_4m[ENTRIES] < intel_tlb_table[k].entries)
609 tlb_lld_4m[ENTRIES] = intel_tlb_table[k].entries;
612 if (tlb_lli_4k[ENTRIES] < intel_tlb_table[k].entries)
613 tlb_lli_4k[ENTRIES] = intel_tlb_table[k].entries;
614 if (tlb_lli_2m[ENTRIES] < intel_tlb_table[k].entries)
615 tlb_lli_2m[ENTRIES] = intel_tlb_table[k].entries;
616 if (tlb_lli_4m[ENTRIES] < intel_tlb_table[k].entries)
617 tlb_lli_4m[ENTRIES] = intel_tlb_table[k].entries;
620 if (tlb_lli_4k[ENTRIES] < intel_tlb_table[k].entries)
621 tlb_lli_4k[ENTRIES] = intel_tlb_table[k].entries;
624 if (tlb_lli_4m[ENTRIES] < intel_tlb_table[k].entries)
625 tlb_lli_4m[ENTRIES] = intel_tlb_table[k].entries;
628 if (tlb_lli_2m[ENTRIES] < intel_tlb_table[k].entries)
629 tlb_lli_2m[ENTRIES] = intel_tlb_table[k].entries;
630 if (tlb_lli_4m[ENTRIES] < intel_tlb_table[k].entries)
631 tlb_lli_4m[ENTRIES] = intel_tlb_table[k].entries;
635 if (tlb_lld_4k[ENTRIES] < intel_tlb_table[k].entries)
636 tlb_lld_4k[ENTRIES] = intel_tlb_table[k].entries;
640 if (tlb_lld_4m[ENTRIES] < intel_tlb_table[k].entries)
641 tlb_lld_4m[ENTRIES] = intel_tlb_table[k].entries;
644 case TLB_DATA0_2M_4M:
645 if (tlb_lld_2m[ENTRIES] < intel_tlb_table[k].entries)
646 tlb_lld_2m[ENTRIES] = intel_tlb_table[k].entries;
647 if (tlb_lld_4m[ENTRIES] < intel_tlb_table[k].entries)
648 tlb_lld_4m[ENTRIES] = intel_tlb_table[k].entries;
651 if (tlb_lld_4k[ENTRIES] < intel_tlb_table[k].entries)
652 tlb_lld_4k[ENTRIES] = intel_tlb_table[k].entries;
653 if (tlb_lld_4m[ENTRIES] < intel_tlb_table[k].entries)
654 tlb_lld_4m[ENTRIES] = intel_tlb_table[k].entries;
657 if (tlb_lld_1g[ENTRIES] < intel_tlb_table[k].entries)
658 tlb_lld_1g[ENTRIES] = intel_tlb_table[k].entries;
663 static void intel_tlb_flushall_shift_set(struct cpuinfo_x86 *c)
665 switch ((c->x86 << 8) + c->x86_model) {
666 case 0x60f: /* original 65 nm celeron/pentium/core2/xeon, "Merom"/"Conroe" */
667 case 0x616: /* single-core 65 nm celeron/core2solo "Merom-L"/"Conroe-L" */
668 case 0x617: /* current 45 nm celeron/core2/xeon "Penryn"/"Wolfdale" */
669 case 0x61d: /* six-core 45 nm xeon "Dunnington" */
670 tlb_flushall_shift = -1;
672 case 0x63a: /* Ivybridge */
673 tlb_flushall_shift = 2;
675 case 0x61a: /* 45 nm nehalem, "Bloomfield" */
676 case 0x61e: /* 45 nm nehalem, "Lynnfield" */
677 case 0x625: /* 32 nm nehalem, "Clarkdale" */
678 case 0x62c: /* 32 nm nehalem, "Gulftown" */
679 case 0x62e: /* 45 nm nehalem-ex, "Beckton" */
680 case 0x62f: /* 32 nm Xeon E7 */
681 case 0x62a: /* SandyBridge */
682 case 0x62d: /* SandyBridge, "Romely-EP" */
684 tlb_flushall_shift = 6;
688 static void intel_detect_tlb(struct cpuinfo_x86 *c)
691 unsigned int regs[4];
692 unsigned char *desc = (unsigned char *)regs;
694 if (c->cpuid_level < 2)
697 /* Number of times to iterate */
698 n = cpuid_eax(2) & 0xFF;
700 for (i = 0 ; i < n ; i++) {
701 cpuid(2, ®s[0], ®s[1], ®s[2], ®s[3]);
703 /* If bit 31 is set, this is an unknown format */
704 for (j = 0 ; j < 3 ; j++)
705 if (regs[j] & (1 << 31))
708 /* Byte 0 is level count, not a descriptor */
709 for (j = 1 ; j < 16 ; j++)
710 intel_tlb_lookup(desc[j]);
712 intel_tlb_flushall_shift_set(c);
715 static const struct cpu_dev intel_cpu_dev = {
717 .c_ident = { "GenuineIntel" },
720 { .family = 4, .model_names =
722 [0] = "486 DX-25/33",
733 { .family = 5, .model_names =
735 [0] = "Pentium 60/66 A-step",
736 [1] = "Pentium 60/66",
737 [2] = "Pentium 75 - 200",
738 [3] = "OverDrive PODP5V83",
740 [7] = "Mobile Pentium 75 - 200",
741 [8] = "Mobile Pentium MMX",
742 [9] = "Quark SoC X1000",
745 { .family = 6, .model_names =
747 [0] = "Pentium Pro A-step",
749 [3] = "Pentium II (Klamath)",
750 [4] = "Pentium II (Deschutes)",
751 [5] = "Pentium II (Deschutes)",
752 [6] = "Mobile Pentium II",
753 [7] = "Pentium III (Katmai)",
754 [8] = "Pentium III (Coppermine)",
755 [10] = "Pentium III (Cascades)",
756 [11] = "Pentium III (Tualatin)",
759 { .family = 15, .model_names =
761 [0] = "Pentium 4 (Unknown)",
762 [1] = "Pentium 4 (Willamette)",
763 [2] = "Pentium 4 (Northwood)",
764 [4] = "Pentium 4 (Foster)",
765 [5] = "Pentium 4 (Foster)",
769 .legacy_cache_size = intel_size_cache,
771 .c_detect_tlb = intel_detect_tlb,
772 .c_early_init = early_init_intel,
773 .c_init = init_intel,
774 .c_x86_vendor = X86_VENDOR_INTEL,
777 cpu_dev_register(intel_cpu_dev);