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/cpufeature.h>
12 #include <asm/pgtable.h>
18 #include <linux/topology.h>
23 #ifdef CONFIG_X86_LOCAL_APIC
24 #include <asm/mpspec.h>
29 * Just in case our CPU detection goes bad, or you have a weird system,
30 * allow a way to override the automatic disabling of MPX.
34 static int __init forcempx_setup(char *__unused)
40 __setup("intel-skd-046-workaround=disable", forcempx_setup);
42 void check_mpx_erratum(struct cpuinfo_x86 *c)
47 * Turn off the MPX feature on CPUs where SMEP is not
48 * available or disabled.
50 * Works around Intel Erratum SKD046: "Branch Instructions
51 * May Initialize MPX Bound Registers Incorrectly".
53 * This might falsely disable MPX on systems without
54 * SMEP, like Atom processors without SMEP. But there
55 * is no such hardware known at the moment.
57 if (cpu_has(c, X86_FEATURE_MPX) && !cpu_has(c, X86_FEATURE_SMEP)) {
58 setup_clear_cpu_cap(X86_FEATURE_MPX);
59 pr_warn("x86/mpx: Disabling MPX since SMEP not present\n");
63 static void early_init_intel(struct cpuinfo_x86 *c)
67 /* Unmask CPUID levels if masked: */
68 if (c->x86 > 6 || (c->x86 == 6 && c->x86_model >= 0xd)) {
69 if (msr_clear_bit(MSR_IA32_MISC_ENABLE,
70 MSR_IA32_MISC_ENABLE_LIMIT_CPUID_BIT) > 0) {
71 c->cpuid_level = cpuid_eax(0);
76 if ((c->x86 == 0xf && c->x86_model >= 0x03) ||
77 (c->x86 == 0x6 && c->x86_model >= 0x0e))
78 set_cpu_cap(c, X86_FEATURE_CONSTANT_TSC);
80 if (c->x86 >= 6 && !cpu_has(c, X86_FEATURE_IA64)) {
83 wrmsr(MSR_IA32_UCODE_REV, 0, 0);
84 /* Required by the SDM */
86 rdmsr(MSR_IA32_UCODE_REV, lower_word, c->microcode);
90 * Atom erratum AAE44/AAF40/AAG38/AAH41:
92 * A race condition between speculative fetches and invalidating
93 * a large page. This is worked around in microcode, but we
94 * need the microcode to have already been loaded... so if it is
95 * not, recommend a BIOS update and disable large pages.
97 if (c->x86 == 6 && c->x86_model == 0x1c && c->x86_mask <= 2 &&
98 c->microcode < 0x20e) {
99 pr_warn("Atom PSE erratum detected, BIOS microcode update recommended\n");
100 clear_cpu_cap(c, X86_FEATURE_PSE);
104 set_cpu_cap(c, X86_FEATURE_SYSENTER32);
106 /* Netburst reports 64 bytes clflush size, but does IO in 128 bytes */
107 if (c->x86 == 15 && c->x86_cache_alignment == 64)
108 c->x86_cache_alignment = 128;
111 /* CPUID workaround for 0F33/0F34 CPU */
112 if (c->x86 == 0xF && c->x86_model == 0x3
113 && (c->x86_mask == 0x3 || c->x86_mask == 0x4))
114 c->x86_phys_bits = 36;
117 * c->x86_power is 8000_0007 edx. Bit 8 is TSC runs at constant rate
118 * with P/T states and does not stop in deep C-states.
120 * It is also reliable across cores and sockets. (but not across
121 * cabinets - we turn it off in that case explicitly.)
123 if (c->x86_power & (1 << 8)) {
124 set_cpu_cap(c, X86_FEATURE_CONSTANT_TSC);
125 set_cpu_cap(c, X86_FEATURE_NONSTOP_TSC);
126 if (!check_tsc_unstable())
127 set_sched_clock_stable();
130 /* Penwell and Cloverview have the TSC which doesn't sleep on S3 */
132 switch (c->x86_model) {
133 case 0x27: /* Penwell */
134 case 0x35: /* Cloverview */
135 case 0x4a: /* Merrifield */
136 set_cpu_cap(c, X86_FEATURE_NONSTOP_TSC_S3);
144 * There is a known erratum on Pentium III and Core Solo
146 * " Page with PAT set to WC while associated MTRR is UC
147 * may consolidate to UC "
148 * Because of this erratum, it is better to stick with
149 * setting WC in MTRR rather than using PAT on these CPUs.
151 * Enable PAT WC only on P4, Core 2 or later CPUs.
153 if (c->x86 == 6 && c->x86_model < 15)
154 clear_cpu_cap(c, X86_FEATURE_PAT);
156 #ifdef CONFIG_KMEMCHECK
158 * P4s have a "fast strings" feature which causes single-
159 * stepping REP instructions to only generate a #DB on
160 * cache-line boundaries.
162 * Ingo Molnar reported a Pentium D (model 6) and a Xeon
163 * (model 2) with the same problem.
166 if (msr_clear_bit(MSR_IA32_MISC_ENABLE,
167 MSR_IA32_MISC_ENABLE_FAST_STRING_BIT) > 0)
168 pr_info("kmemcheck: Disabling fast string operations\n");
172 * If fast string is not enabled in IA32_MISC_ENABLE for any reason,
173 * clear the fast string and enhanced fast string CPU capabilities.
175 if (c->x86 > 6 || (c->x86 == 6 && c->x86_model >= 0xd)) {
176 rdmsrl(MSR_IA32_MISC_ENABLE, misc_enable);
177 if (!(misc_enable & MSR_IA32_MISC_ENABLE_FAST_STRING)) {
178 pr_info("Disabled fast string operations\n");
179 setup_clear_cpu_cap(X86_FEATURE_REP_GOOD);
180 setup_clear_cpu_cap(X86_FEATURE_ERMS);
185 * Intel Quark Core DevMan_001.pdf section 6.4.11
186 * "The operating system also is required to invalidate (i.e., flush)
187 * the TLB when any changes are made to any of the page table entries.
188 * The operating system must reload CR3 to cause the TLB to be flushed"
190 * As a result, boot_cpu_has(X86_FEATURE_PGE) in arch/x86/include/asm/tlbflush.h
191 * should be false so that __flush_tlb_all() causes CR3 insted of CR4.PGE
194 if (c->x86 == 5 && c->x86_model == 9) {
195 pr_info("Disabling PGE capability bit\n");
196 setup_clear_cpu_cap(X86_FEATURE_PGE);
199 if (c->cpuid_level >= 0x00000001) {
200 u32 eax, ebx, ecx, edx;
202 cpuid(0x00000001, &eax, &ebx, &ecx, &edx);
204 * If HTT (EDX[28]) is set EBX[16:23] contain the number of
205 * apicids which are reserved per package. Store the resulting
206 * shift value for the package management code.
208 if (edx & (1U << 28))
209 c->x86_coreid_bits = get_count_order((ebx >> 16) & 0xff);
212 check_mpx_erratum(c);
217 * Early probe support logic for ppro memory erratum #50
219 * This is called before we do cpu ident work
222 int ppro_with_ram_bug(void)
224 /* Uses data from early_cpu_detect now */
225 if (boot_cpu_data.x86_vendor == X86_VENDOR_INTEL &&
226 boot_cpu_data.x86 == 6 &&
227 boot_cpu_data.x86_model == 1 &&
228 boot_cpu_data.x86_mask < 8) {
229 pr_info("Pentium Pro with Errata#50 detected. Taking evasive action.\n");
235 static void intel_smp_check(struct cpuinfo_x86 *c)
237 /* calling is from identify_secondary_cpu() ? */
242 * Mask B, Pentium, but not Pentium MMX
245 c->x86_mask >= 1 && c->x86_mask <= 4 &&
248 * Remember we have B step Pentia with bugs
250 WARN_ONCE(1, "WARNING: SMP operation may be unreliable"
251 "with B stepping processors.\n");
256 static int __init forcepae_setup(char *__unused)
261 __setup("forcepae", forcepae_setup);
263 static void intel_workarounds(struct cpuinfo_x86 *c)
265 #ifdef CONFIG_X86_F00F_BUG
267 * All models of Pentium and Pentium with MMX technology CPUs
268 * have the F0 0F bug, which lets nonprivileged users lock up the
269 * system. Announce that the fault handler will be checking for it.
270 * The Quark is also family 5, but does not have the same bug.
272 clear_cpu_bug(c, X86_BUG_F00F);
273 if (c->x86 == 5 && c->x86_model < 9) {
274 static int f00f_workaround_enabled;
276 set_cpu_bug(c, X86_BUG_F00F);
277 if (!f00f_workaround_enabled) {
278 pr_notice("Intel Pentium with F0 0F bug - workaround enabled.\n");
279 f00f_workaround_enabled = 1;
285 * SEP CPUID bug: Pentium Pro reports SEP but doesn't have it until
288 if ((c->x86<<8 | c->x86_model<<4 | c->x86_mask) < 0x633)
289 clear_cpu_cap(c, X86_FEATURE_SEP);
292 * PAE CPUID issue: many Pentium M report no PAE but may have a
293 * functionally usable PAE implementation.
294 * Forcefully enable PAE if kernel parameter "forcepae" is present.
297 pr_warn("PAE forced!\n");
298 set_cpu_cap(c, X86_FEATURE_PAE);
299 add_taint(TAINT_CPU_OUT_OF_SPEC, LOCKDEP_NOW_UNRELIABLE);
303 * P4 Xeon errata 037 workaround.
304 * Hardware prefetcher may cause stale data to be loaded into the cache.
306 if ((c->x86 == 15) && (c->x86_model == 1) && (c->x86_mask == 1)) {
307 if (msr_set_bit(MSR_IA32_MISC_ENABLE,
308 MSR_IA32_MISC_ENABLE_PREFETCH_DISABLE_BIT)
310 pr_info("CPU: C0 stepping P4 Xeon detected.\n");
311 pr_info("CPU: Disabling hardware prefetching (Errata 037)\n");
316 * See if we have a good local APIC by checking for buggy Pentia,
317 * i.e. all B steppings and the C2 stepping of P54C when using their
318 * integrated APIC (see 11AP erratum in "Pentium Processor
319 * Specification Update").
321 if (boot_cpu_has(X86_FEATURE_APIC) && (c->x86<<8 | c->x86_model<<4) == 0x520 &&
322 (c->x86_mask < 0x6 || c->x86_mask == 0xb))
323 set_cpu_bug(c, X86_BUG_11AP);
326 #ifdef CONFIG_X86_INTEL_USERCOPY
328 * Set up the preferred alignment for movsl bulk memory moves
331 case 4: /* 486: untested */
333 case 5: /* Old Pentia: untested */
335 case 6: /* PII/PIII only like movsl with 8-byte alignment */
338 case 15: /* P4 is OK down to 8-byte alignment */
347 static void intel_workarounds(struct cpuinfo_x86 *c)
352 static void srat_detect_node(struct cpuinfo_x86 *c)
356 int cpu = smp_processor_id();
358 /* Don't do the funky fallback heuristics the AMD version employs
360 node = numa_cpu_node(cpu);
361 if (node == NUMA_NO_NODE || !node_online(node)) {
362 /* reuse the value from init_cpu_to_node() */
363 node = cpu_to_node(cpu);
365 numa_set_node(cpu, node);
370 * find out the number of processor cores on the die
372 static int intel_num_cpu_cores(struct cpuinfo_x86 *c)
374 unsigned int eax, ebx, ecx, edx;
376 if (!IS_ENABLED(CONFIG_SMP) || c->cpuid_level < 4)
379 /* Intel has a non-standard dependency on %ecx for this CPUID level. */
380 cpuid_count(4, 0, &eax, &ebx, &ecx, &edx);
382 return (eax >> 26) + 1;
387 static void detect_vmx_virtcap(struct cpuinfo_x86 *c)
389 /* Intel VMX MSR indicated features */
390 #define X86_VMX_FEATURE_PROC_CTLS_TPR_SHADOW 0x00200000
391 #define X86_VMX_FEATURE_PROC_CTLS_VNMI 0x00400000
392 #define X86_VMX_FEATURE_PROC_CTLS_2ND_CTLS 0x80000000
393 #define X86_VMX_FEATURE_PROC_CTLS2_VIRT_APIC 0x00000001
394 #define X86_VMX_FEATURE_PROC_CTLS2_EPT 0x00000002
395 #define X86_VMX_FEATURE_PROC_CTLS2_VPID 0x00000020
397 u32 vmx_msr_low, vmx_msr_high, msr_ctl, msr_ctl2;
399 clear_cpu_cap(c, X86_FEATURE_TPR_SHADOW);
400 clear_cpu_cap(c, X86_FEATURE_VNMI);
401 clear_cpu_cap(c, X86_FEATURE_FLEXPRIORITY);
402 clear_cpu_cap(c, X86_FEATURE_EPT);
403 clear_cpu_cap(c, X86_FEATURE_VPID);
405 rdmsr(MSR_IA32_VMX_PROCBASED_CTLS, vmx_msr_low, vmx_msr_high);
406 msr_ctl = vmx_msr_high | vmx_msr_low;
407 if (msr_ctl & X86_VMX_FEATURE_PROC_CTLS_TPR_SHADOW)
408 set_cpu_cap(c, X86_FEATURE_TPR_SHADOW);
409 if (msr_ctl & X86_VMX_FEATURE_PROC_CTLS_VNMI)
410 set_cpu_cap(c, X86_FEATURE_VNMI);
411 if (msr_ctl & X86_VMX_FEATURE_PROC_CTLS_2ND_CTLS) {
412 rdmsr(MSR_IA32_VMX_PROCBASED_CTLS2,
413 vmx_msr_low, vmx_msr_high);
414 msr_ctl2 = vmx_msr_high | vmx_msr_low;
415 if ((msr_ctl2 & X86_VMX_FEATURE_PROC_CTLS2_VIRT_APIC) &&
416 (msr_ctl & X86_VMX_FEATURE_PROC_CTLS_TPR_SHADOW))
417 set_cpu_cap(c, X86_FEATURE_FLEXPRIORITY);
418 if (msr_ctl2 & X86_VMX_FEATURE_PROC_CTLS2_EPT)
419 set_cpu_cap(c, X86_FEATURE_EPT);
420 if (msr_ctl2 & X86_VMX_FEATURE_PROC_CTLS2_VPID)
421 set_cpu_cap(c, X86_FEATURE_VPID);
425 static void init_intel_energy_perf(struct cpuinfo_x86 *c)
430 * Initialize MSR_IA32_ENERGY_PERF_BIAS if not already initialized.
431 * (x86_energy_perf_policy(8) is available to change it at run-time.)
433 if (!cpu_has(c, X86_FEATURE_EPB))
436 rdmsrl(MSR_IA32_ENERGY_PERF_BIAS, epb);
437 if ((epb & 0xF) != ENERGY_PERF_BIAS_PERFORMANCE)
440 pr_warn_once("ENERGY_PERF_BIAS: Set to 'normal', was 'performance'\n");
441 pr_warn_once("ENERGY_PERF_BIAS: View and update with x86_energy_perf_policy(8)\n");
442 epb = (epb & ~0xF) | ENERGY_PERF_BIAS_NORMAL;
443 wrmsrl(MSR_IA32_ENERGY_PERF_BIAS, epb);
446 static void intel_bsp_resume(struct cpuinfo_x86 *c)
449 * MSR_IA32_ENERGY_PERF_BIAS is lost across suspend/resume,
450 * so reinitialize it properly like during bootup:
452 init_intel_energy_perf(c);
455 static void init_intel(struct cpuinfo_x86 *c)
461 intel_workarounds(c);
464 * Detect the extended topology information if available. This
465 * will reinitialise the initial_apicid which will be used
466 * in init_intel_cacheinfo()
468 detect_extended_topology(c);
470 if (!cpu_has(c, X86_FEATURE_XTOPOLOGY)) {
472 * let's use the legacy cpuid vector 0x1 and 0x4 for topology
475 c->x86_max_cores = intel_num_cpu_cores(c);
481 l2 = init_intel_cacheinfo(c);
483 /* Detect legacy cache sizes if init_intel_cacheinfo did not */
485 cpu_detect_cache_sizes(c);
486 l2 = c->x86_cache_size;
489 if (c->cpuid_level > 9) {
490 unsigned eax = cpuid_eax(10);
491 /* Check for version and the number of counters */
492 if ((eax & 0xff) && (((eax>>8) & 0xff) > 1))
493 set_cpu_cap(c, X86_FEATURE_ARCH_PERFMON);
496 if (cpu_has(c, X86_FEATURE_XMM2))
497 set_cpu_cap(c, X86_FEATURE_LFENCE_RDTSC);
499 if (boot_cpu_has(X86_FEATURE_DS)) {
501 rdmsr(MSR_IA32_MISC_ENABLE, l1, l2);
503 set_cpu_cap(c, X86_FEATURE_BTS);
505 set_cpu_cap(c, X86_FEATURE_PEBS);
508 if (c->x86 == 6 && boot_cpu_has(X86_FEATURE_CLFLUSH) &&
509 (c->x86_model == 29 || c->x86_model == 46 || c->x86_model == 47))
510 set_cpu_bug(c, X86_BUG_CLFLUSH_MONITOR);
514 c->x86_cache_alignment = c->x86_clflush_size * 2;
516 set_cpu_cap(c, X86_FEATURE_REP_GOOD);
519 * Names for the Pentium II/Celeron processors
520 * detectable only by also checking the cache size.
521 * Dixon is NOT a Celeron.
526 switch (c->x86_model) {
529 p = "Celeron (Covington)";
531 p = "Mobile Pentium II (Dixon)";
536 p = "Celeron (Mendocino)";
537 else if (c->x86_mask == 0 || c->x86_mask == 5)
543 p = "Celeron (Coppermine)";
548 strcpy(c->x86_model_id, p);
552 set_cpu_cap(c, X86_FEATURE_P4);
554 set_cpu_cap(c, X86_FEATURE_P3);
557 /* Work around errata */
560 if (cpu_has(c, X86_FEATURE_VMX))
561 detect_vmx_virtcap(c);
563 init_intel_energy_perf(c);
567 static unsigned int intel_size_cache(struct cpuinfo_x86 *c, unsigned int size)
570 * Intel PIII Tualatin. This comes in two flavours.
571 * One has 256kb of cache, the other 512. We have no way
572 * to determine which, so we use a boottime override
573 * for the 512kb model, and assume 256 otherwise.
575 if ((c->x86 == 6) && (c->x86_model == 11) && (size == 0))
579 * Intel Quark SoC X1000 contains a 4-way set associative
580 * 16K cache with a 16 byte cache line and 256 lines per tag
582 if ((c->x86 == 5) && (c->x86_model == 9))
588 #define TLB_INST_4K 0x01
589 #define TLB_INST_4M 0x02
590 #define TLB_INST_2M_4M 0x03
592 #define TLB_INST_ALL 0x05
593 #define TLB_INST_1G 0x06
595 #define TLB_DATA_4K 0x11
596 #define TLB_DATA_4M 0x12
597 #define TLB_DATA_2M_4M 0x13
598 #define TLB_DATA_4K_4M 0x14
600 #define TLB_DATA_1G 0x16
602 #define TLB_DATA0_4K 0x21
603 #define TLB_DATA0_4M 0x22
604 #define TLB_DATA0_2M_4M 0x23
607 #define STLB_4K_2M 0x42
609 static const struct _tlb_table intel_tlb_table[] = {
610 { 0x01, TLB_INST_4K, 32, " TLB_INST 4 KByte pages, 4-way set associative" },
611 { 0x02, TLB_INST_4M, 2, " TLB_INST 4 MByte pages, full associative" },
612 { 0x03, TLB_DATA_4K, 64, " TLB_DATA 4 KByte pages, 4-way set associative" },
613 { 0x04, TLB_DATA_4M, 8, " TLB_DATA 4 MByte pages, 4-way set associative" },
614 { 0x05, TLB_DATA_4M, 32, " TLB_DATA 4 MByte pages, 4-way set associative" },
615 { 0x0b, TLB_INST_4M, 4, " TLB_INST 4 MByte pages, 4-way set associative" },
616 { 0x4f, TLB_INST_4K, 32, " TLB_INST 4 KByte pages */" },
617 { 0x50, TLB_INST_ALL, 64, " TLB_INST 4 KByte and 2-MByte or 4-MByte pages" },
618 { 0x51, TLB_INST_ALL, 128, " TLB_INST 4 KByte and 2-MByte or 4-MByte pages" },
619 { 0x52, TLB_INST_ALL, 256, " TLB_INST 4 KByte and 2-MByte or 4-MByte pages" },
620 { 0x55, TLB_INST_2M_4M, 7, " TLB_INST 2-MByte or 4-MByte pages, fully associative" },
621 { 0x56, TLB_DATA0_4M, 16, " TLB_DATA0 4 MByte pages, 4-way set associative" },
622 { 0x57, TLB_DATA0_4K, 16, " TLB_DATA0 4 KByte pages, 4-way associative" },
623 { 0x59, TLB_DATA0_4K, 16, " TLB_DATA0 4 KByte pages, fully associative" },
624 { 0x5a, TLB_DATA0_2M_4M, 32, " TLB_DATA0 2-MByte or 4 MByte pages, 4-way set associative" },
625 { 0x5b, TLB_DATA_4K_4M, 64, " TLB_DATA 4 KByte and 4 MByte pages" },
626 { 0x5c, TLB_DATA_4K_4M, 128, " TLB_DATA 4 KByte and 4 MByte pages" },
627 { 0x5d, TLB_DATA_4K_4M, 256, " TLB_DATA 4 KByte and 4 MByte pages" },
628 { 0x61, TLB_INST_4K, 48, " TLB_INST 4 KByte pages, full associative" },
629 { 0x63, TLB_DATA_1G, 4, " TLB_DATA 1 GByte pages, 4-way set associative" },
630 { 0x76, TLB_INST_2M_4M, 8, " TLB_INST 2-MByte or 4-MByte pages, fully associative" },
631 { 0xb0, TLB_INST_4K, 128, " TLB_INST 4 KByte pages, 4-way set associative" },
632 { 0xb1, TLB_INST_2M_4M, 4, " TLB_INST 2M pages, 4-way, 8 entries or 4M pages, 4-way entries" },
633 { 0xb2, TLB_INST_4K, 64, " TLB_INST 4KByte pages, 4-way set associative" },
634 { 0xb3, TLB_DATA_4K, 128, " TLB_DATA 4 KByte pages, 4-way set associative" },
635 { 0xb4, TLB_DATA_4K, 256, " TLB_DATA 4 KByte pages, 4-way associative" },
636 { 0xb5, TLB_INST_4K, 64, " TLB_INST 4 KByte pages, 8-way set associative" },
637 { 0xb6, TLB_INST_4K, 128, " TLB_INST 4 KByte pages, 8-way set associative" },
638 { 0xba, TLB_DATA_4K, 64, " TLB_DATA 4 KByte pages, 4-way associative" },
639 { 0xc0, TLB_DATA_4K_4M, 8, " TLB_DATA 4 KByte and 4 MByte pages, 4-way associative" },
640 { 0xc1, STLB_4K_2M, 1024, " STLB 4 KByte and 2 MByte pages, 8-way associative" },
641 { 0xc2, TLB_DATA_2M_4M, 16, " DTLB 2 MByte/4MByte pages, 4-way associative" },
642 { 0xca, STLB_4K, 512, " STLB 4 KByte pages, 4-way associative" },
646 static void intel_tlb_lookup(const unsigned char desc)
652 /* look up this descriptor in the table */
653 for (k = 0; intel_tlb_table[k].descriptor != desc && \
654 intel_tlb_table[k].descriptor != 0; k++)
657 if (intel_tlb_table[k].tlb_type == 0)
660 switch (intel_tlb_table[k].tlb_type) {
662 if (tlb_lli_4k[ENTRIES] < intel_tlb_table[k].entries)
663 tlb_lli_4k[ENTRIES] = intel_tlb_table[k].entries;
664 if (tlb_lld_4k[ENTRIES] < intel_tlb_table[k].entries)
665 tlb_lld_4k[ENTRIES] = intel_tlb_table[k].entries;
668 if (tlb_lli_4k[ENTRIES] < intel_tlb_table[k].entries)
669 tlb_lli_4k[ENTRIES] = intel_tlb_table[k].entries;
670 if (tlb_lld_4k[ENTRIES] < intel_tlb_table[k].entries)
671 tlb_lld_4k[ENTRIES] = intel_tlb_table[k].entries;
672 if (tlb_lli_2m[ENTRIES] < intel_tlb_table[k].entries)
673 tlb_lli_2m[ENTRIES] = intel_tlb_table[k].entries;
674 if (tlb_lld_2m[ENTRIES] < intel_tlb_table[k].entries)
675 tlb_lld_2m[ENTRIES] = intel_tlb_table[k].entries;
676 if (tlb_lli_4m[ENTRIES] < intel_tlb_table[k].entries)
677 tlb_lli_4m[ENTRIES] = intel_tlb_table[k].entries;
678 if (tlb_lld_4m[ENTRIES] < intel_tlb_table[k].entries)
679 tlb_lld_4m[ENTRIES] = intel_tlb_table[k].entries;
682 if (tlb_lli_4k[ENTRIES] < intel_tlb_table[k].entries)
683 tlb_lli_4k[ENTRIES] = intel_tlb_table[k].entries;
684 if (tlb_lli_2m[ENTRIES] < intel_tlb_table[k].entries)
685 tlb_lli_2m[ENTRIES] = intel_tlb_table[k].entries;
686 if (tlb_lli_4m[ENTRIES] < intel_tlb_table[k].entries)
687 tlb_lli_4m[ENTRIES] = intel_tlb_table[k].entries;
690 if (tlb_lli_4k[ENTRIES] < intel_tlb_table[k].entries)
691 tlb_lli_4k[ENTRIES] = intel_tlb_table[k].entries;
694 if (tlb_lli_4m[ENTRIES] < intel_tlb_table[k].entries)
695 tlb_lli_4m[ENTRIES] = intel_tlb_table[k].entries;
698 if (tlb_lli_2m[ENTRIES] < intel_tlb_table[k].entries)
699 tlb_lli_2m[ENTRIES] = intel_tlb_table[k].entries;
700 if (tlb_lli_4m[ENTRIES] < intel_tlb_table[k].entries)
701 tlb_lli_4m[ENTRIES] = intel_tlb_table[k].entries;
705 if (tlb_lld_4k[ENTRIES] < intel_tlb_table[k].entries)
706 tlb_lld_4k[ENTRIES] = intel_tlb_table[k].entries;
710 if (tlb_lld_4m[ENTRIES] < intel_tlb_table[k].entries)
711 tlb_lld_4m[ENTRIES] = intel_tlb_table[k].entries;
714 case TLB_DATA0_2M_4M:
715 if (tlb_lld_2m[ENTRIES] < intel_tlb_table[k].entries)
716 tlb_lld_2m[ENTRIES] = intel_tlb_table[k].entries;
717 if (tlb_lld_4m[ENTRIES] < intel_tlb_table[k].entries)
718 tlb_lld_4m[ENTRIES] = intel_tlb_table[k].entries;
721 if (tlb_lld_4k[ENTRIES] < intel_tlb_table[k].entries)
722 tlb_lld_4k[ENTRIES] = intel_tlb_table[k].entries;
723 if (tlb_lld_4m[ENTRIES] < intel_tlb_table[k].entries)
724 tlb_lld_4m[ENTRIES] = intel_tlb_table[k].entries;
727 if (tlb_lld_1g[ENTRIES] < intel_tlb_table[k].entries)
728 tlb_lld_1g[ENTRIES] = intel_tlb_table[k].entries;
733 static void intel_detect_tlb(struct cpuinfo_x86 *c)
736 unsigned int regs[4];
737 unsigned char *desc = (unsigned char *)regs;
739 if (c->cpuid_level < 2)
742 /* Number of times to iterate */
743 n = cpuid_eax(2) & 0xFF;
745 for (i = 0 ; i < n ; i++) {
746 cpuid(2, ®s[0], ®s[1], ®s[2], ®s[3]);
748 /* If bit 31 is set, this is an unknown format */
749 for (j = 0 ; j < 3 ; j++)
750 if (regs[j] & (1 << 31))
753 /* Byte 0 is level count, not a descriptor */
754 for (j = 1 ; j < 16 ; j++)
755 intel_tlb_lookup(desc[j]);
759 static const struct cpu_dev intel_cpu_dev = {
761 .c_ident = { "GenuineIntel" },
764 { .family = 4, .model_names =
766 [0] = "486 DX-25/33",
777 { .family = 5, .model_names =
779 [0] = "Pentium 60/66 A-step",
780 [1] = "Pentium 60/66",
781 [2] = "Pentium 75 - 200",
782 [3] = "OverDrive PODP5V83",
784 [7] = "Mobile Pentium 75 - 200",
785 [8] = "Mobile Pentium MMX",
786 [9] = "Quark SoC X1000",
789 { .family = 6, .model_names =
791 [0] = "Pentium Pro A-step",
793 [3] = "Pentium II (Klamath)",
794 [4] = "Pentium II (Deschutes)",
795 [5] = "Pentium II (Deschutes)",
796 [6] = "Mobile Pentium II",
797 [7] = "Pentium III (Katmai)",
798 [8] = "Pentium III (Coppermine)",
799 [10] = "Pentium III (Cascades)",
800 [11] = "Pentium III (Tualatin)",
803 { .family = 15, .model_names =
805 [0] = "Pentium 4 (Unknown)",
806 [1] = "Pentium 4 (Willamette)",
807 [2] = "Pentium 4 (Northwood)",
808 [4] = "Pentium 4 (Foster)",
809 [5] = "Pentium 4 (Foster)",
813 .legacy_cache_size = intel_size_cache,
815 .c_detect_tlb = intel_detect_tlb,
816 .c_early_init = early_init_intel,
817 .c_init = init_intel,
818 .c_bsp_resume = intel_bsp_resume,
819 .c_x86_vendor = X86_VENDOR_INTEL,
822 cpu_dev_register(intel_cpu_dev);