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[~andy/linux] / arch / x86 / kernel / setup_64.c
1 /*
2  *  Copyright (C) 1995  Linus Torvalds
3  */
4
5 /*
6  * This file handles the architecture-dependent parts of initialization
7  */
8
9 #include <linux/errno.h>
10 #include <linux/sched.h>
11 #include <linux/kernel.h>
12 #include <linux/mm.h>
13 #include <linux/stddef.h>
14 #include <linux/unistd.h>
15 #include <linux/ptrace.h>
16 #include <linux/slab.h>
17 #include <linux/user.h>
18 #include <linux/screen_info.h>
19 #include <linux/ioport.h>
20 #include <linux/delay.h>
21 #include <linux/init.h>
22 #include <linux/initrd.h>
23 #include <linux/highmem.h>
24 #include <linux/bootmem.h>
25 #include <linux/module.h>
26 #include <asm/processor.h>
27 #include <linux/console.h>
28 #include <linux/seq_file.h>
29 #include <linux/crash_dump.h>
30 #include <linux/root_dev.h>
31 #include <linux/pci.h>
32 #include <asm/pci-direct.h>
33 #include <linux/efi.h>
34 #include <linux/acpi.h>
35 #include <linux/kallsyms.h>
36 #include <linux/edd.h>
37 #include <linux/iscsi_ibft.h>
38 #include <linux/mmzone.h>
39 #include <linux/kexec.h>
40 #include <linux/cpufreq.h>
41 #include <linux/dmi.h>
42 #include <linux/dma-mapping.h>
43 #include <linux/ctype.h>
44 #include <linux/sort.h>
45 #include <linux/uaccess.h>
46 #include <linux/init_ohci1394_dma.h>
47 #include <linux/kvm_para.h>
48
49 #include <asm/mtrr.h>
50 #include <asm/uaccess.h>
51 #include <asm/system.h>
52 #include <asm/vsyscall.h>
53 #include <asm/io.h>
54 #include <asm/smp.h>
55 #include <asm/msr.h>
56 #include <asm/desc.h>
57 #include <video/edid.h>
58 #include <asm/e820.h>
59 #include <asm/mpspec.h>
60 #include <asm/dma.h>
61 #include <asm/gart.h>
62 #include <asm/mpspec.h>
63 #include <asm/mmu_context.h>
64 #include <asm/proto.h>
65 #include <asm/setup.h>
66 #include <asm/numa.h>
67 #include <asm/sections.h>
68 #include <asm/dmi.h>
69 #include <asm/cacheflush.h>
70 #include <asm/mce.h>
71 #include <asm/ds.h>
72 #include <asm/topology.h>
73 #include <asm/trampoline.h>
74 #include <asm/pat.h>
75 #include <asm/mmconfig.h>
76
77 #include <mach_apic.h>
78 #ifdef CONFIG_PARAVIRT
79 #include <asm/paravirt.h>
80 #else
81 #define ARCH_SETUP
82 #endif
83
84 /*
85  * Machine setup..
86  */
87
88 struct cpuinfo_x86 boot_cpu_data __read_mostly;
89 EXPORT_SYMBOL(boot_cpu_data);
90
91 __u32 cleared_cpu_caps[NCAPINTS] __cpuinitdata;
92
93 unsigned long mmu_cr4_features;
94
95 /* Boot loader ID as an integer, for the benefit of proc_dointvec */
96 int bootloader_type;
97
98 unsigned long saved_video_mode;
99
100 /*
101  * Early DMI memory
102  */
103 int dmi_alloc_index;
104 char dmi_alloc_data[DMI_MAX_DATA];
105
106 /*
107  * Setup options
108  */
109 struct screen_info screen_info;
110 EXPORT_SYMBOL(screen_info);
111 struct sys_desc_table_struct {
112         unsigned short length;
113         unsigned char table[0];
114 };
115
116 struct edid_info edid_info;
117 EXPORT_SYMBOL_GPL(edid_info);
118
119 extern int root_mountflags;
120
121 static char __initdata command_line[COMMAND_LINE_SIZE];
122
123 static struct resource standard_io_resources[] = {
124         { .name = "dma1", .start = 0x00, .end = 0x1f,
125                 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
126         { .name = "pic1", .start = 0x20, .end = 0x21,
127                 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
128         { .name = "timer0", .start = 0x40, .end = 0x43,
129                 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
130         { .name = "timer1", .start = 0x50, .end = 0x53,
131                 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
132         { .name = "keyboard", .start = 0x60, .end = 0x60,
133                 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
134         { .name = "keyboard", .start = 0x64, .end = 0x64,
135                 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
136         { .name = "dma page reg", .start = 0x80, .end = 0x8f,
137                 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
138         { .name = "pic2", .start = 0xa0, .end = 0xa1,
139                 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
140         { .name = "dma2", .start = 0xc0, .end = 0xdf,
141                 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
142         { .name = "fpu", .start = 0xf0, .end = 0xff,
143                 .flags = IORESOURCE_BUSY | IORESOURCE_IO }
144 };
145
146 #define IORESOURCE_RAM (IORESOURCE_BUSY | IORESOURCE_MEM)
147
148 static struct resource data_resource = {
149         .name = "Kernel data",
150         .start = 0,
151         .end = 0,
152         .flags = IORESOURCE_RAM,
153 };
154 static struct resource code_resource = {
155         .name = "Kernel code",
156         .start = 0,
157         .end = 0,
158         .flags = IORESOURCE_RAM,
159 };
160 static struct resource bss_resource = {
161         .name = "Kernel bss",
162         .start = 0,
163         .end = 0,
164         .flags = IORESOURCE_RAM,
165 };
166
167 static void __init early_cpu_init(void);
168 static void __cpuinit early_identify_cpu(struct cpuinfo_x86 *c);
169
170 #ifdef CONFIG_PROC_VMCORE
171 /* elfcorehdr= specifies the location of elf core header
172  * stored by the crashed kernel. This option will be passed
173  * by kexec loader to the capture kernel.
174  */
175 static int __init setup_elfcorehdr(char *arg)
176 {
177         char *end;
178         if (!arg)
179                 return -EINVAL;
180         elfcorehdr_addr = memparse(arg, &end);
181         return end > arg ? 0 : -EINVAL;
182 }
183 early_param("elfcorehdr", setup_elfcorehdr);
184 #endif
185
186 #ifndef CONFIG_NUMA
187 static void __init
188 contig_initmem_init(unsigned long start_pfn, unsigned long end_pfn)
189 {
190         unsigned long bootmap_size, bootmap;
191
192         bootmap_size = bootmem_bootmap_pages(end_pfn)<<PAGE_SHIFT;
193         bootmap = find_e820_area(0, end_pfn<<PAGE_SHIFT, bootmap_size,
194                                  PAGE_SIZE);
195         if (bootmap == -1L)
196                 panic("Cannot find bootmem map of size %ld\n", bootmap_size);
197         bootmap_size = init_bootmem(bootmap >> PAGE_SHIFT, end_pfn);
198         e820_register_active_regions(0, start_pfn, end_pfn);
199         free_bootmem_with_active_regions(0, end_pfn);
200         early_res_to_bootmem(0, end_pfn<<PAGE_SHIFT);
201         reserve_bootmem(bootmap, bootmap_size, BOOTMEM_DEFAULT);
202 }
203 #endif
204
205 #if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE)
206 struct edd edd;
207 #ifdef CONFIG_EDD_MODULE
208 EXPORT_SYMBOL(edd);
209 #endif
210 /**
211  * copy_edd() - Copy the BIOS EDD information
212  *              from boot_params into a safe place.
213  *
214  */
215 static inline void copy_edd(void)
216 {
217      memcpy(edd.mbr_signature, boot_params.edd_mbr_sig_buffer,
218             sizeof(edd.mbr_signature));
219      memcpy(edd.edd_info, boot_params.eddbuf, sizeof(edd.edd_info));
220      edd.mbr_signature_nr = boot_params.edd_mbr_sig_buf_entries;
221      edd.edd_info_nr = boot_params.eddbuf_entries;
222 }
223 #else
224 static inline void copy_edd(void)
225 {
226 }
227 #endif
228
229 /* Overridden in paravirt.c if CONFIG_PARAVIRT */
230 void __attribute__((weak)) __init memory_setup(void)
231 {
232        machine_specific_memory_setup();
233 }
234
235 /* Current gdt points %fs at the "master" per-cpu area: after this,
236  * it's on the real one. */
237 void switch_to_new_gdt(void)
238 {
239         struct desc_ptr gdt_descr;
240
241         gdt_descr.address = (long)get_cpu_gdt_table(smp_processor_id());
242         gdt_descr.size = GDT_SIZE - 1;
243         load_gdt(&gdt_descr);
244 }
245
246 /*
247  * setup_arch - architecture-specific boot-time initializations
248  *
249  * Note: On x86_64, fixmaps are ready for use even before this is called.
250  */
251 void __init setup_arch(char **cmdline_p)
252 {
253         unsigned i;
254
255         printk(KERN_INFO "Command line: %s\n", boot_command_line);
256
257         ROOT_DEV = old_decode_dev(boot_params.hdr.root_dev);
258         screen_info = boot_params.screen_info;
259         edid_info = boot_params.edid_info;
260         saved_video_mode = boot_params.hdr.vid_mode;
261         bootloader_type = boot_params.hdr.type_of_loader;
262
263 #ifdef CONFIG_BLK_DEV_RAM
264         rd_image_start = boot_params.hdr.ram_size & RAMDISK_IMAGE_START_MASK;
265         rd_prompt = ((boot_params.hdr.ram_size & RAMDISK_PROMPT_FLAG) != 0);
266         rd_doload = ((boot_params.hdr.ram_size & RAMDISK_LOAD_FLAG) != 0);
267 #endif
268 #ifdef CONFIG_EFI
269         if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature,
270                      "EL64", 4)) {
271                 efi_enabled = 1;
272                 efi_reserve_early();
273         }
274 #endif
275
276         ARCH_SETUP
277
278         setup_memory_map();
279         copy_edd();
280
281         if (!boot_params.hdr.root_flags)
282                 root_mountflags &= ~MS_RDONLY;
283         init_mm.start_code = (unsigned long) &_text;
284         init_mm.end_code = (unsigned long) &_etext;
285         init_mm.end_data = (unsigned long) &_edata;
286         init_mm.brk = (unsigned long) &_end;
287
288         code_resource.start = virt_to_phys(&_text);
289         code_resource.end = virt_to_phys(&_etext)-1;
290         data_resource.start = virt_to_phys(&_etext);
291         data_resource.end = virt_to_phys(&_edata)-1;
292         bss_resource.start = virt_to_phys(&__bss_start);
293         bss_resource.end = virt_to_phys(&__bss_stop)-1;
294
295         early_cpu_init();
296         early_identify_cpu(&boot_cpu_data);
297
298         strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE);
299         *cmdline_p = command_line;
300
301         parse_setup_data();
302
303         parse_early_param();
304
305 #ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT
306         if (init_ohci1394_dma_early)
307                 init_ohci1394_dma_on_all_controllers();
308 #endif
309
310         finish_e820_parsing();
311
312         /* after parse_early_param, so could debug it */
313         insert_resource(&iomem_resource, &code_resource);
314         insert_resource(&iomem_resource, &data_resource);
315         insert_resource(&iomem_resource, &bss_resource);
316
317         early_gart_iommu_check();
318
319         e820_register_active_regions(0, 0, -1UL);
320         /*
321          * partially used pages are not usable - thus
322          * we are rounding upwards:
323          */
324         end_pfn = e820_end_of_ram();
325
326         /* pre allocte 4k for mptable mpc */
327         early_reserve_e820_mpc_new();
328         /* update e820 for memory not covered by WB MTRRs */
329         mtrr_bp_init();
330         if (mtrr_trim_uncached_memory(end_pfn)) {
331                 remove_all_active_ranges();
332                 e820_register_active_regions(0, 0, -1UL);
333                 end_pfn = e820_end_of_ram();
334         }
335
336         num_physpages = end_pfn;
337
338         check_efer();
339
340         max_pfn_mapped = init_memory_mapping(0, (end_pfn << PAGE_SHIFT));
341         if (efi_enabled)
342                 efi_init();
343
344         vsmp_init();
345
346         dmi_scan_machine();
347
348         io_delay_init();
349
350 #ifdef CONFIG_KVM_CLOCK
351         kvmclock_init();
352 #endif
353
354 #ifdef CONFIG_ACPI
355         /*
356          * Initialize the ACPI boot-time table parser (gets the RSDP and SDT).
357          * Call this early for SRAT node setup.
358          */
359         acpi_boot_table_init();
360 #endif
361
362         /* How many end-of-memory variables you have, grandma! */
363         max_low_pfn = end_pfn;
364         max_pfn = end_pfn;
365         high_memory = (void *)__va(end_pfn * PAGE_SIZE - 1) + 1;
366
367         /* Remove active ranges so rediscovery with NUMA-awareness happens */
368         remove_all_active_ranges();
369
370 #ifdef CONFIG_ACPI_NUMA
371         /*
372          * Parse SRAT to discover nodes.
373          */
374         acpi_numa_init();
375 #endif
376
377 #ifdef CONFIG_NUMA
378         numa_initmem_init(0, end_pfn);
379 #else
380         contig_initmem_init(0, end_pfn);
381 #endif
382
383         dma32_reserve_bootmem();
384
385 #ifdef CONFIG_ACPI_SLEEP
386         /*
387          * Reserve low memory region for sleep support.
388          */
389        acpi_reserve_bootmem();
390 #endif
391
392 #ifdef CONFIG_X86_MPPARSE
393        /*
394         * Find and reserve possible boot-time SMP configuration:
395         */
396         find_smp_config();
397 #endif
398 #ifdef CONFIG_BLK_DEV_INITRD
399         if (boot_params.hdr.type_of_loader && boot_params.hdr.ramdisk_image) {
400                 unsigned long ramdisk_image = boot_params.hdr.ramdisk_image;
401                 unsigned long ramdisk_size  = boot_params.hdr.ramdisk_size;
402                 unsigned long ramdisk_end   = ramdisk_image + ramdisk_size;
403                 unsigned long end_of_mem    = end_pfn << PAGE_SHIFT;
404
405                 if (ramdisk_end <= end_of_mem) {
406                         /*
407                          * don't need to reserve again, already reserved early
408                          * in x86_64_start_kernel, and early_res_to_bootmem
409                          * convert that to reserved in bootmem
410                          */
411                         initrd_start = ramdisk_image + PAGE_OFFSET;
412                         initrd_end = initrd_start+ramdisk_size;
413                 } else {
414                         free_bootmem(ramdisk_image, ramdisk_size);
415                         printk(KERN_ERR "initrd extends beyond end of memory "
416                                "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
417                                ramdisk_end, end_of_mem);
418                         initrd_start = 0;
419                 }
420         }
421 #endif
422         reserve_crashkernel();
423
424         reserve_ibft_region();
425
426         paging_init();
427         map_vsyscall();
428
429         early_quirks();
430
431 #ifdef CONFIG_ACPI
432         /*
433          * Read APIC and some other early information from ACPI tables.
434          */
435         acpi_boot_init();
436 #endif
437
438         init_cpu_to_node();
439
440 #ifdef CONFIG_X86_MPPARSE
441         /*
442          * get boot-time SMP configuration:
443          */
444         if (smp_found_config)
445                 get_smp_config();
446 #endif
447         init_apic_mappings();
448         ioapic_init_mappings();
449
450         kvm_guest_init();
451
452         /*
453          * We trust e820 completely. No explicit ROM probing in memory.
454          */
455         e820_reserve_resources();
456         e820_mark_nosave_regions(end_pfn);
457
458         /* request I/O space for devices used on all i[345]86 PCs */
459         for (i = 0; i < ARRAY_SIZE(standard_io_resources); i++)
460                 request_resource(&ioport_resource, &standard_io_resources[i]);
461
462         e820_setup_gap();
463
464 #ifdef CONFIG_VT
465 #if defined(CONFIG_VGA_CONSOLE)
466         if (!efi_enabled || (efi_mem_type(0xa0000) != EFI_CONVENTIONAL_MEMORY))
467                 conswitchp = &vga_con;
468 #elif defined(CONFIG_DUMMY_CONSOLE)
469         conswitchp = &dummy_con;
470 #endif
471 #endif
472
473         /* do this before identify_cpu for boot cpu */
474         check_enable_amd_mmconf_dmi();
475 }
476
477 struct cpu_dev *cpu_devs[X86_VENDOR_NUM] = {};
478
479 static void __cpuinit default_init(struct cpuinfo_x86 *c)
480 {
481         display_cacheinfo(c);
482 }
483
484 static struct cpu_dev __cpuinitdata default_cpu = {
485         .c_init = default_init,
486         .c_vendor = "Unknown",
487 };
488 static struct cpu_dev *this_cpu __cpuinitdata = &default_cpu;
489
490 int __cpuinit get_model_name(struct cpuinfo_x86 *c)
491 {
492         unsigned int *v;
493
494         if (c->extended_cpuid_level < 0x80000004)
495                 return 0;
496
497         v = (unsigned int *) c->x86_model_id;
498         cpuid(0x80000002, &v[0], &v[1], &v[2], &v[3]);
499         cpuid(0x80000003, &v[4], &v[5], &v[6], &v[7]);
500         cpuid(0x80000004, &v[8], &v[9], &v[10], &v[11]);
501         c->x86_model_id[48] = 0;
502         return 1;
503 }
504
505
506 void __cpuinit display_cacheinfo(struct cpuinfo_x86 *c)
507 {
508         unsigned int n, dummy, eax, ebx, ecx, edx;
509
510         n = c->extended_cpuid_level;
511
512         if (n >= 0x80000005) {
513                 cpuid(0x80000005, &dummy, &ebx, &ecx, &edx);
514                 printk(KERN_INFO "CPU: L1 I Cache: %dK (%d bytes/line), "
515                        "D cache %dK (%d bytes/line)\n",
516                        edx>>24, edx&0xFF, ecx>>24, ecx&0xFF);
517                 c->x86_cache_size = (ecx>>24) + (edx>>24);
518                 /* On K8 L1 TLB is inclusive, so don't count it */
519                 c->x86_tlbsize = 0;
520         }
521
522         if (n >= 0x80000006) {
523                 cpuid(0x80000006, &dummy, &ebx, &ecx, &edx);
524                 ecx = cpuid_ecx(0x80000006);
525                 c->x86_cache_size = ecx >> 16;
526                 c->x86_tlbsize += ((ebx >> 16) & 0xfff) + (ebx & 0xfff);
527
528                 printk(KERN_INFO "CPU: L2 Cache: %dK (%d bytes/line)\n",
529                 c->x86_cache_size, ecx & 0xFF);
530         }
531         if (n >= 0x80000008) {
532                 cpuid(0x80000008, &eax, &dummy, &dummy, &dummy);
533                 c->x86_virt_bits = (eax >> 8) & 0xff;
534                 c->x86_phys_bits = eax & 0xff;
535         }
536 }
537
538 void __cpuinit detect_ht(struct cpuinfo_x86 *c)
539 {
540 #ifdef CONFIG_SMP
541         u32 eax, ebx, ecx, edx;
542         int index_msb, core_bits;
543
544         cpuid(1, &eax, &ebx, &ecx, &edx);
545
546
547         if (!cpu_has(c, X86_FEATURE_HT))
548                 return;
549         if (cpu_has(c, X86_FEATURE_CMP_LEGACY))
550                 goto out;
551
552         smp_num_siblings = (ebx & 0xff0000) >> 16;
553
554         if (smp_num_siblings == 1) {
555                 printk(KERN_INFO  "CPU: Hyper-Threading is disabled\n");
556         } else if (smp_num_siblings > 1) {
557
558                 if (smp_num_siblings > NR_CPUS) {
559                         printk(KERN_WARNING "CPU: Unsupported number of "
560                                "siblings %d", smp_num_siblings);
561                         smp_num_siblings = 1;
562                         return;
563                 }
564
565                 index_msb = get_count_order(smp_num_siblings);
566                 c->phys_proc_id = phys_pkg_id(index_msb);
567
568                 smp_num_siblings = smp_num_siblings / c->x86_max_cores;
569
570                 index_msb = get_count_order(smp_num_siblings);
571
572                 core_bits = get_count_order(c->x86_max_cores);
573
574                 c->cpu_core_id = phys_pkg_id(index_msb) &
575                                                ((1 << core_bits) - 1);
576         }
577 out:
578         if ((c->x86_max_cores * smp_num_siblings) > 1) {
579                 printk(KERN_INFO  "CPU: Physical Processor ID: %d\n",
580                        c->phys_proc_id);
581                 printk(KERN_INFO  "CPU: Processor Core ID: %d\n",
582                        c->cpu_core_id);
583         }
584
585 #endif
586 }
587
588 static void __cpuinit get_cpu_vendor(struct cpuinfo_x86 *c)
589 {
590         char *v = c->x86_vendor_id;
591         int i;
592         static int printed;
593
594         for (i = 0; i < X86_VENDOR_NUM; i++) {
595                 if (cpu_devs[i]) {
596                         if (!strcmp(v, cpu_devs[i]->c_ident[0]) ||
597                             (cpu_devs[i]->c_ident[1] &&
598                             !strcmp(v, cpu_devs[i]->c_ident[1]))) {
599                                 c->x86_vendor = i;
600                                 this_cpu = cpu_devs[i];
601                                 return;
602                         }
603                 }
604         }
605         if (!printed) {
606                 printed++;
607                 printk(KERN_ERR "CPU: Vendor unknown, using generic init.\n");
608                 printk(KERN_ERR "CPU: Your system may be unstable.\n");
609         }
610         c->x86_vendor = X86_VENDOR_UNKNOWN;
611 }
612
613 static void __init early_cpu_support_print(void)
614 {
615         int i,j;
616         struct cpu_dev *cpu_devx;
617
618         printk("KERNEL supported cpus:\n");
619         for (i = 0; i < X86_VENDOR_NUM; i++) {
620                 cpu_devx = cpu_devs[i];
621                 if (!cpu_devx)
622                         continue;
623                 for (j = 0; j < 2; j++) {
624                         if (!cpu_devx->c_ident[j])
625                                 continue;
626                         printk("  %s %s\n", cpu_devx->c_vendor,
627                                 cpu_devx->c_ident[j]);
628                 }
629         }
630 }
631
632 static void __init early_cpu_init(void)
633 {
634         struct cpu_vendor_dev *cvdev;
635
636         for (cvdev = __x86cpuvendor_start ;
637              cvdev < __x86cpuvendor_end   ;
638              cvdev++)
639                 cpu_devs[cvdev->vendor] = cvdev->cpu_dev;
640         early_cpu_support_print();
641 }
642
643 /* Do some early cpuid on the boot CPU to get some parameter that are
644    needed before check_bugs. Everything advanced is in identify_cpu
645    below. */
646 static void __cpuinit early_identify_cpu(struct cpuinfo_x86 *c)
647 {
648         u32 tfms, xlvl;
649
650         c->loops_per_jiffy = loops_per_jiffy;
651         c->x86_cache_size = -1;
652         c->x86_vendor = X86_VENDOR_UNKNOWN;
653         c->x86_model = c->x86_mask = 0; /* So far unknown... */
654         c->x86_vendor_id[0] = '\0'; /* Unset */
655         c->x86_model_id[0] = '\0';  /* Unset */
656         c->x86_clflush_size = 64;
657         c->x86_cache_alignment = c->x86_clflush_size;
658         c->x86_max_cores = 1;
659         c->x86_coreid_bits = 0;
660         c->extended_cpuid_level = 0;
661         memset(&c->x86_capability, 0, sizeof c->x86_capability);
662
663         /* Get vendor name */
664         cpuid(0x00000000, (unsigned int *)&c->cpuid_level,
665               (unsigned int *)&c->x86_vendor_id[0],
666               (unsigned int *)&c->x86_vendor_id[8],
667               (unsigned int *)&c->x86_vendor_id[4]);
668
669         get_cpu_vendor(c);
670
671         /* Initialize the standard set of capabilities */
672         /* Note that the vendor-specific code below might override */
673
674         /* Intel-defined flags: level 0x00000001 */
675         if (c->cpuid_level >= 0x00000001) {
676                 __u32 misc;
677                 cpuid(0x00000001, &tfms, &misc, &c->x86_capability[4],
678                       &c->x86_capability[0]);
679                 c->x86 = (tfms >> 8) & 0xf;
680                 c->x86_model = (tfms >> 4) & 0xf;
681                 c->x86_mask = tfms & 0xf;
682                 if (c->x86 == 0xf)
683                         c->x86 += (tfms >> 20) & 0xff;
684                 if (c->x86 >= 0x6)
685                         c->x86_model += ((tfms >> 16) & 0xF) << 4;
686                 if (test_cpu_cap(c, X86_FEATURE_CLFLSH))
687                         c->x86_clflush_size = ((misc >> 8) & 0xff) * 8;
688         } else {
689                 /* Have CPUID level 0 only - unheard of */
690                 c->x86 = 4;
691         }
692
693         c->initial_apicid = (cpuid_ebx(1) >> 24) & 0xff;
694 #ifdef CONFIG_SMP
695         c->phys_proc_id = c->initial_apicid;
696 #endif
697         /* AMD-defined flags: level 0x80000001 */
698         xlvl = cpuid_eax(0x80000000);
699         c->extended_cpuid_level = xlvl;
700         if ((xlvl & 0xffff0000) == 0x80000000) {
701                 if (xlvl >= 0x80000001) {
702                         c->x86_capability[1] = cpuid_edx(0x80000001);
703                         c->x86_capability[6] = cpuid_ecx(0x80000001);
704                 }
705                 if (xlvl >= 0x80000004)
706                         get_model_name(c); /* Default name */
707         }
708
709         /* Transmeta-defined flags: level 0x80860001 */
710         xlvl = cpuid_eax(0x80860000);
711         if ((xlvl & 0xffff0000) == 0x80860000) {
712                 /* Don't set x86_cpuid_level here for now to not confuse. */
713                 if (xlvl >= 0x80860001)
714                         c->x86_capability[2] = cpuid_edx(0x80860001);
715         }
716
717         c->extended_cpuid_level = cpuid_eax(0x80000000);
718         if (c->extended_cpuid_level >= 0x80000007)
719                 c->x86_power = cpuid_edx(0x80000007);
720
721         if (c->x86_vendor != X86_VENDOR_UNKNOWN &&
722             cpu_devs[c->x86_vendor]->c_early_init)
723                 cpu_devs[c->x86_vendor]->c_early_init(c);
724
725         validate_pat_support(c);
726 }
727
728 /*
729  * This does the hard work of actually picking apart the CPU stuff...
730  */
731 void __cpuinit identify_cpu(struct cpuinfo_x86 *c)
732 {
733         int i;
734
735         early_identify_cpu(c);
736
737         init_scattered_cpuid_features(c);
738
739         c->apicid = phys_pkg_id(0);
740
741         /*
742          * Vendor-specific initialization.  In this section we
743          * canonicalize the feature flags, meaning if there are
744          * features a certain CPU supports which CPUID doesn't
745          * tell us, CPUID claiming incorrect flags, or other bugs,
746          * we handle them here.
747          *
748          * At the end of this section, c->x86_capability better
749          * indicate the features this CPU genuinely supports!
750          */
751         if (this_cpu->c_init)
752                 this_cpu->c_init(c);
753
754         detect_ht(c);
755
756         /*
757          * On SMP, boot_cpu_data holds the common feature set between
758          * all CPUs; so make sure that we indicate which features are
759          * common between the CPUs.  The first time this routine gets
760          * executed, c == &boot_cpu_data.
761          */
762         if (c != &boot_cpu_data) {
763                 /* AND the already accumulated flags with these */
764                 for (i = 0; i < NCAPINTS; i++)
765                         boot_cpu_data.x86_capability[i] &= c->x86_capability[i];
766         }
767
768         /* Clear all flags overriden by options */
769         for (i = 0; i < NCAPINTS; i++)
770                 c->x86_capability[i] &= ~cleared_cpu_caps[i];
771
772 #ifdef CONFIG_X86_MCE
773         mcheck_init(c);
774 #endif
775         select_idle_routine(c);
776
777 #ifdef CONFIG_NUMA
778         numa_add_cpu(smp_processor_id());
779 #endif
780
781 }
782
783 void __cpuinit identify_boot_cpu(void)
784 {
785         identify_cpu(&boot_cpu_data);
786 }
787
788 void __cpuinit identify_secondary_cpu(struct cpuinfo_x86 *c)
789 {
790         BUG_ON(c == &boot_cpu_data);
791         identify_cpu(c);
792         mtrr_ap_init();
793 }
794
795 static __init int setup_noclflush(char *arg)
796 {
797         setup_clear_cpu_cap(X86_FEATURE_CLFLSH);
798         return 1;
799 }
800 __setup("noclflush", setup_noclflush);
801
802 void __cpuinit print_cpu_info(struct cpuinfo_x86 *c)
803 {
804         if (c->x86_model_id[0])
805                 printk(KERN_CONT "%s", c->x86_model_id);
806
807         if (c->x86_mask || c->cpuid_level >= 0)
808                 printk(KERN_CONT " stepping %02x\n", c->x86_mask);
809         else
810                 printk(KERN_CONT "\n");
811 }
812
813 static __init int setup_disablecpuid(char *arg)
814 {
815         int bit;
816         if (get_option(&arg, &bit) && bit < NCAPINTS*32)
817                 setup_clear_cpu_cap(bit);
818         else
819                 return 0;
820         return 1;
821 }
822 __setup("clearcpuid=", setup_disablecpuid);