Merge tag 'vfio-v4.6-rc1' of git://github.com/awilliam/linux-vfio
[linux-2.6-block.git] / arch / x86 / kernel / setup.c
CommitLineData
1da177e4 1/*
1da177e4
LT
2 * Copyright (C) 1995 Linus Torvalds
3 *
4 * Support of BIGMEM added by Gerhard Wichert, Siemens AG, July 1999
5 *
6 * Memory region support
7 * David Parsons <orc@pell.chi.il.us>, July-August 1999
8 *
9 * Added E820 sanitization routine (removes overlapping memory regions);
10 * Brian Moyle <bmoyle@mvista.com>, February 2001
11 *
12 * Moved CPU detection code to cpu/${cpu}.c
13 * Patrick Mochel <mochel@osdl.org>, March 2002
14 *
15 * Provisions for empty E820 memory regions (reported by certain BIOSes).
16 * Alex Achenbach <xela@slit.de>, December 2002.
17 *
18 */
19
20/*
21 * This file handles the architecture-dependent parts of initialization
22 */
23
24#include <linux/sched.h>
25#include <linux/mm.h>
05b79bdc 26#include <linux/mmzone.h>
894673ee 27#include <linux/screen_info.h>
1da177e4
LT
28#include <linux/ioport.h>
29#include <linux/acpi.h>
efafc8b2 30#include <linux/sfi.h>
1da177e4
LT
31#include <linux/apm_bios.h>
32#include <linux/initrd.h>
33#include <linux/bootmem.h>
72d7c3b3 34#include <linux/memblock.h>
1da177e4
LT
35#include <linux/seq_file.h>
36#include <linux/console.h>
1da177e4
LT
37#include <linux/root_dev.h>
38#include <linux/highmem.h>
39#include <linux/module.h>
40#include <linux/efi.h>
41#include <linux/init.h>
42#include <linux/edd.h>
138fe4e0 43#include <linux/iscsi_ibft.h>
1da177e4 44#include <linux/nodemask.h>
1bc3b91a 45#include <linux/kexec.h>
e9928674 46#include <linux/dmi.h>
22a9835c 47#include <linux/pfn.h>
376ff035 48#include <linux/pci.h>
46d671b5 49#include <asm/pci-direct.h>
f212ec4b 50#include <linux/init_ohci1394_dma.h>
790c73f6 51#include <linux/kvm_para.h>
0a2b9a6e 52#include <linux/dma-contiguous.h>
1bc3b91a 53
46d671b5
YL
54#include <linux/errno.h>
55#include <linux/kernel.h>
56#include <linux/stddef.h>
57#include <linux/unistd.h>
58#include <linux/ptrace.h>
46d671b5
YL
59#include <linux/user.h>
60#include <linux/delay.h>
46d671b5
YL
61
62#include <linux/kallsyms.h>
46d671b5
YL
63#include <linux/cpufreq.h>
64#include <linux/dma-mapping.h>
65#include <linux/ctype.h>
66#include <linux/uaccess.h>
67
68#include <linux/percpu.h>
69#include <linux/crash_dump.h>
69575d38 70#include <linux/tboot.h>
b3c869d3 71#include <linux/jiffies.h>
46d671b5 72
1da177e4 73#include <video/edid.h>
1bc3b91a 74
093af8d7 75#include <asm/mtrr.h>
9635b47d 76#include <asm/apic.h>
084ee1c6 77#include <asm/realmode.h>
1da177e4
LT
78#include <asm/e820.h>
79#include <asm/mpspec.h>
80#include <asm/setup.h>
55f26239 81#include <asm/efi.h>
8e6dafd6
IM
82#include <asm/timer.h>
83#include <asm/i8259.h>
1da177e4
LT
84#include <asm/sections.h>
85#include <asm/io_apic.h>
86#include <asm/ist.h>
1164dd00 87#include <asm/setup_arch.h>
ce3fe6b2 88#include <asm/bios_ebda.h>
00bf4098 89#include <asm/cacheflush.h>
2fde61fd 90#include <asm/processor.h>
cc9f7a0c 91#include <asm/bugs.h>
ef7f0d6a 92#include <asm/kasan.h>
1da177e4 93
46d671b5 94#include <asm/vsyscall.h>
6e5385d4 95#include <asm/cpu.h>
46d671b5
YL
96#include <asm/desc.h>
97#include <asm/dma.h>
46a7fa27 98#include <asm/iommu.h>
1d9b16d1 99#include <asm/gart.h>
46d671b5
YL
100#include <asm/mmu_context.h>
101#include <asm/proto.h>
102
46d671b5 103#include <asm/paravirt.h>
88b094fb 104#include <asm/hypervisor.h>
fd699c76 105#include <asm/olpc_ofw.h>
46d671b5
YL
106
107#include <asm/percpu.h>
46d671b5
YL
108#include <asm/topology.h>
109#include <asm/apicdef.h>
23ac4ae8 110#include <asm/amd_nb.h>
a2202aa2 111#include <asm/mce.h>
f49aa448 112#include <asm/alternative.h>
da6b737b 113#include <asm/prom.h>
9a2bc335 114#include <asm/microcode.h>
46d671b5 115
2b72394e 116/*
66520ebc
JS
117 * max_low_pfn_mapped: highest direct mapped pfn under 4GB
118 * max_pfn_mapped: highest direct mapped pfn over 4GB
119 *
120 * The direct mapping only covers E820_RAM regions, so the ranges and gaps are
121 * represented by pfn_mapped
2b72394e
PE
122 */
123unsigned long max_low_pfn_mapped;
124unsigned long max_pfn_mapped;
125
e808bae2 126#ifdef CONFIG_DMI
796216a5 127RESERVE_BRK(dmi_alloc, 65536);
e808bae2 128#endif
796216a5 129
c0b5842a 130
93dbda7c
JF
131static __initdata unsigned long _brk_start = (unsigned long)__brk_base;
132unsigned long _brk_end = (unsigned long)__brk_base;
133
c0b5842a
IM
134#ifdef CONFIG_X86_64
135int default_cpu_present_to_apicid(int mps_cpu)
136{
137 return __default_cpu_present_to_apicid(mps_cpu);
138}
139
e11dadab 140int default_check_phys_apicid_present(int phys_apicid)
c0b5842a 141{
e11dadab 142 return __default_check_phys_apicid_present(phys_apicid);
c0b5842a
IM
143}
144#endif
145
217b8ce8 146struct boot_params boot_params;
217b8ce8 147
1da177e4
LT
148/*
149 * Machine setup..
150 */
c9cce83d
BW
151static struct resource data_resource = {
152 .name = "Kernel data",
153 .start = 0,
154 .end = 0,
f33b14a4 155 .flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM
c9cce83d
BW
156};
157
158static struct resource code_resource = {
159 .name = "Kernel code",
160 .start = 0,
161 .end = 0,
f33b14a4 162 .flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM
c9cce83d
BW
163};
164
165static struct resource bss_resource = {
166 .name = "Kernel bss",
167 .start = 0,
168 .end = 0,
f33b14a4 169 .flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM
c9cce83d
BW
170};
171
7dea23ec
YL
172
173#ifdef CONFIG_X86_32
1da177e4 174/* cpu data as detected by the assembly code in head.S */
148f9bb8 175struct cpuinfo_x86 new_cpu_data = {
015221fe 176 .wp_works_ok = -1,
015221fe 177};
1da177e4 178/* common cpu data for all cpus */
015221fe
KM
179struct cpuinfo_x86 boot_cpu_data __read_mostly = {
180 .wp_works_ok = -1,
015221fe 181};
129f6946 182EXPORT_SYMBOL(boot_cpu_data);
1da177e4 183
0c254e38
AS
184unsigned int def_to_bigsmp;
185
1da177e4
LT
186/* for MCA, but anyone else can use it if they want */
187unsigned int machine_id;
188unsigned int machine_submodel_id;
189unsigned int BIOS_revision;
1da177e4 190
7dea23ec
YL
191struct apm_info apm_info;
192EXPORT_SYMBOL(apm_info);
193
194#if defined(CONFIG_X86_SPEEDSTEP_SMI) || \
195 defined(CONFIG_X86_SPEEDSTEP_SMI_MODULE)
196struct ist_info ist_info;
197EXPORT_SYMBOL(ist_info);
198#else
199struct ist_info ist_info;
200#endif
201
202#else
ed26dbe5
JF
203struct cpuinfo_x86 boot_cpu_data __read_mostly = {
204 .x86_phys_bits = MAX_PHYSMEM_BITS,
205};
7dea23ec
YL
206EXPORT_SYMBOL(boot_cpu_data);
207#endif
208
209
210#if !defined(CONFIG_X86_PAE) || defined(CONFIG_X86_64)
277d5b40 211__visible unsigned long mmu_cr4_features;
7dea23ec 212#else
277d5b40 213__visible unsigned long mmu_cr4_features = X86_CR4_PAE;
7dea23ec
YL
214#endif
215
5031296c
PA
216/* Boot loader ID and version as integers, for the benefit of proc_dointvec */
217int bootloader_type, bootloader_version;
1da177e4 218
1da177e4
LT
219/*
220 * Setup options
221 */
1da177e4 222struct screen_info screen_info;
129f6946 223EXPORT_SYMBOL(screen_info);
1da177e4 224struct edid_info edid_info;
5e518d76 225EXPORT_SYMBOL_GPL(edid_info);
1da177e4 226
1da177e4
LT
227extern int root_mountflags;
228
e44b7b75 229unsigned long saved_video_mode;
1da177e4 230
cf8fa920 231#define RAMDISK_IMAGE_START_MASK 0x07FF
1da177e4 232#define RAMDISK_PROMPT_FLAG 0x8000
cf8fa920 233#define RAMDISK_LOAD_FLAG 0x4000
1da177e4 234
4e498b66 235static char __initdata command_line[COMMAND_LINE_SIZE];
516cbf37
TB
236#ifdef CONFIG_CMDLINE_BOOL
237static char __initdata builtin_cmdline[COMMAND_LINE_SIZE] = CONFIG_CMDLINE;
238#endif
1da177e4 239
1da177e4
LT
240#if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE)
241struct edd edd;
242#ifdef CONFIG_EDD_MODULE
243EXPORT_SYMBOL(edd);
244#endif
245/**
246 * copy_edd() - Copy the BIOS EDD information
247 * from boot_params into a safe place.
248 *
249 */
9eaa192d 250static inline void __init copy_edd(void)
1da177e4 251{
30c82645
PA
252 memcpy(edd.mbr_signature, boot_params.edd_mbr_sig_buffer,
253 sizeof(edd.mbr_signature));
254 memcpy(edd.edd_info, boot_params.eddbuf, sizeof(edd.edd_info));
255 edd.mbr_signature_nr = boot_params.edd_mbr_sig_buf_entries;
256 edd.edd_info_nr = boot_params.eddbuf_entries;
1da177e4
LT
257}
258#else
9eaa192d 259static inline void __init copy_edd(void)
1da177e4
LT
260{
261}
262#endif
263
5368a2be
PA
264void * __init extend_brk(size_t size, size_t align)
265{
266 size_t mask = align - 1;
267 void *ret;
268
269 BUG_ON(_brk_start == 0);
270 BUG_ON(align & mask);
271
272 _brk_end = (_brk_end + mask) & ~mask;
273 BUG_ON((char *)(_brk_end + size) > __brk_limit);
274
275 ret = (void *)_brk_end;
276 _brk_end += size;
277
278 memset(ret, 0, size);
279
280 return ret;
281}
282
148b2098 283#ifdef CONFIG_X86_32
e5f15b45 284static void __init cleanup_highmap(void)
f005fe12
YL
285{
286}
854c879f
PE
287#endif
288
5368a2be
PA
289static void __init reserve_brk(void)
290{
291 if (_brk_end > _brk_start)
fc8d7826
AD
292 memblock_reserve(__pa_symbol(_brk_start),
293 _brk_end - _brk_start);
5368a2be
PA
294
295 /* Mark brk area as locked down and no longer taking any
296 new allocations */
297 _brk_start = 0;
298}
299
5aa3d718
BP
300u64 relocated_ramdisk;
301
cf8fa920
PA
302#ifdef CONFIG_BLK_DEV_INITRD
303
a8a51a88
YL
304static u64 __init get_ramdisk_image(void)
305{
306 u64 ramdisk_image = boot_params.hdr.ramdisk_image;
307
ee92d815
YL
308 ramdisk_image |= (u64)boot_params.ext_ramdisk_image << 32;
309
a8a51a88
YL
310 return ramdisk_image;
311}
312static u64 __init get_ramdisk_size(void)
313{
314 u64 ramdisk_size = boot_params.hdr.ramdisk_size;
315
ee92d815
YL
316 ramdisk_size |= (u64)boot_params.ext_ramdisk_size << 32;
317
a8a51a88
YL
318 return ramdisk_size;
319}
320
eb1379cb 321static void __init relocate_initrd(void)
cf8fa920 322{
c967da6a 323 /* Assume only end is not page aligned */
a8a51a88
YL
324 u64 ramdisk_image = get_ramdisk_image();
325 u64 ramdisk_size = get_ramdisk_size();
c967da6a 326 u64 area_size = PAGE_ALIGN(ramdisk_size);
cf8fa920 327
e8c57d40 328 /* We need to move the initrd down into directly mapped mem */
5aa3d718
BP
329 relocated_ramdisk = memblock_find_in_range(0, PFN_PHYS(max_pfn_mapped),
330 area_size, PAGE_SIZE);
cf8fa920 331
5aa3d718 332 if (!relocated_ramdisk)
3945e2c9 333 panic("Cannot find place for new RAMDISK of size %lld\n",
5aa3d718 334 ramdisk_size);
3945e2c9 335
e8c57d40 336 /* Note: this includes all the mem currently occupied by
cf8fa920 337 the initrd, we rely on that fact to keep the data intact. */
5aa3d718
BP
338 memblock_reserve(relocated_ramdisk, area_size);
339 initrd_start = relocated_ramdisk + PAGE_OFFSET;
cf8fa920 340 initrd_end = initrd_start + ramdisk_size;
365811d6 341 printk(KERN_INFO "Allocated new RAMDISK: [mem %#010llx-%#010llx]\n",
5aa3d718 342 relocated_ramdisk, relocated_ramdisk + ramdisk_size - 1);
cf8fa920 343
5dd2c4bd
MS
344 copy_from_early_mem((void *)initrd_start, ramdisk_image, ramdisk_size);
345
365811d6
BH
346 printk(KERN_INFO "Move RAMDISK from [mem %#010llx-%#010llx] to"
347 " [mem %#010llx-%#010llx]\n",
ba5b14cc 348 ramdisk_image, ramdisk_image + ramdisk_size - 1,
5aa3d718 349 relocated_ramdisk, relocated_ramdisk + ramdisk_size - 1);
eb1379cb 350}
9a27f5c5 351
1b8c78be
YL
352static void __init early_reserve_initrd(void)
353{
354 /* Assume only end is not page aligned */
a8a51a88
YL
355 u64 ramdisk_image = get_ramdisk_image();
356 u64 ramdisk_size = get_ramdisk_size();
1b8c78be
YL
357 u64 ramdisk_end = PAGE_ALIGN(ramdisk_image + ramdisk_size);
358
359 if (!boot_params.hdr.type_of_loader ||
360 !ramdisk_image || !ramdisk_size)
361 return; /* No initrd provided by bootloader */
362
363 memblock_reserve(ramdisk_image, ramdisk_end - ramdisk_image);
364}
eb1379cb
YL
365static void __init reserve_initrd(void)
366{
c967da6a 367 /* Assume only end is not page aligned */
a8a51a88
YL
368 u64 ramdisk_image = get_ramdisk_image();
369 u64 ramdisk_size = get_ramdisk_size();
c967da6a 370 u64 ramdisk_end = PAGE_ALIGN(ramdisk_image + ramdisk_size);
e8c57d40 371 u64 mapped_size;
eb1379cb
YL
372
373 if (!boot_params.hdr.type_of_loader ||
374 !ramdisk_image || !ramdisk_size)
375 return; /* No initrd provided by bootloader */
376
377 initrd_start = 0;
378
595ad9af 379 mapped_size = memblock_mem_size(max_pfn_mapped);
e8c57d40 380 if (ramdisk_size >= (mapped_size>>1))
ab7b64e9
PJ
381 panic("initrd too large to handle, "
382 "disabling initrd (%lld needed, %lld available)\n",
e8c57d40 383 ramdisk_size, mapped_size>>1);
eb1379cb 384
365811d6
BH
385 printk(KERN_INFO "RAMDISK: [mem %#010llx-%#010llx]\n", ramdisk_image,
386 ramdisk_end - 1);
eb1379cb 387
74f27655 388 if (pfn_range_is_mapped(PFN_DOWN(ramdisk_image),
e8c57d40
YL
389 PFN_DOWN(ramdisk_end))) {
390 /* All are mapped, easy case */
eb1379cb
YL
391 initrd_start = ramdisk_image + PAGE_OFFSET;
392 initrd_end = initrd_start + ramdisk_size;
393 return;
394 }
395
eb1379cb 396 relocate_initrd();
8c5dd8f4 397
24aa0788 398 memblock_free(ramdisk_image, ramdisk_end - ramdisk_image);
cf8fa920 399}
225c37d7 400#else
1b8c78be
YL
401static void __init early_reserve_initrd(void)
402{
403}
eb1379cb 404static void __init reserve_initrd(void)
225c37d7
YL
405{
406}
cf8fa920
PA
407#endif /* CONFIG_BLK_DEV_INITRD */
408
29f784e3 409static void __init parse_setup_data(void)
257b0fde
YL
410{
411 struct setup_data *data;
30e46b57 412 u64 pa_data, pa_next;
257b0fde 413
257b0fde
YL
414 pa_data = boot_params.hdr.setup_data;
415 while (pa_data) {
7389882c 416 u32 data_len, data_type;
f1c2b357 417
7389882c 418 data = early_memremap(pa_data, sizeof(*data));
f1c2b357 419 data_len = data->len + sizeof(struct setup_data);
30e46b57
LC
420 data_type = data->type;
421 pa_next = data->next;
8d4a40bc 422 early_memunmap(data, sizeof(*data));
f1c2b357 423
30e46b57 424 switch (data_type) {
257b0fde 425 case SETUP_E820_EXT:
30e46b57 426 parse_e820_ext(pa_data, data_len);
257b0fde 427 break;
da6b737b
SAS
428 case SETUP_DTB:
429 add_dtb(pa_data);
257b0fde 430 break;
1fec0533
DY
431 case SETUP_EFI:
432 parse_efi_setup(pa_data, data_len);
433 break;
257b0fde
YL
434 default:
435 break;
436 }
30e46b57 437 pa_data = pa_next;
257b0fde
YL
438 }
439}
440
a0a0becd 441static void __init e820_reserve_setup_data(void)
28bb2237
YL
442{
443 struct setup_data *data;
444 u64 pa_data;
28bb2237 445
28bb2237 446 pa_data = boot_params.hdr.setup_data;
f2af7d25
WY
447 if (!pa_data)
448 return;
449
28bb2237 450 while (pa_data) {
88b4c146 451 data = early_memremap(pa_data, sizeof(*data));
28bb2237
YL
452 e820_update_range(pa_data, sizeof(*data)+data->len,
453 E820_RAM, E820_RESERVED_KERN);
454 pa_data = data->next;
8d4a40bc 455 early_memunmap(data, sizeof(*data));
28bb2237 456 }
d9a81b44 457
28bb2237 458 sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);
a0a0becd 459 memcpy(&e820_saved, &e820, sizeof(struct e820map));
28bb2237
YL
460 printk(KERN_INFO "extended physical RAM map:\n");
461 e820_print_map("reserve setup_data");
462}
463
a9ce6bc1 464static void __init memblock_x86_reserve_range_setup_data(void)
a0a0becd
YL
465{
466 struct setup_data *data;
467 u64 pa_data;
a0a0becd 468
a0a0becd
YL
469 pa_data = boot_params.hdr.setup_data;
470 while (pa_data) {
88b4c146 471 data = early_memremap(pa_data, sizeof(*data));
24aa0788 472 memblock_reserve(pa_data, sizeof(*data) + data->len);
a0a0becd 473 pa_data = data->next;
8d4a40bc 474 early_memunmap(data, sizeof(*data));
a0a0becd
YL
475 }
476}
477
ccb4defa
YL
478/*
479 * --------- Crashkernel reservation ------------------------------
480 */
481
2965faa5 482#ifdef CONFIG_KEXEC_CORE
32105f7f 483
606134f7
BP
484/* 16M alignment for crash kernel regions */
485#define CRASH_ALIGN (16 << 20)
486
7f8595bf
PA
487/*
488 * Keep the crash kernel below this limit. On 32 bits earlier kernels
489 * would limit the kernel to the low 512 MiB due to mapping restrictions.
55a20ee7 490 * On 64bit, old kexec-tools need to under 896MiB.
7f8595bf
PA
491 */
492#ifdef CONFIG_X86_32
97eac21b
BP
493# define CRASH_ADDR_LOW_MAX (512 << 20)
494# define CRASH_ADDR_HIGH_MAX (512 << 20)
7f8595bf 495#else
97eac21b
BP
496# define CRASH_ADDR_LOW_MAX (896UL << 20)
497# define CRASH_ADDR_HIGH_MAX MAXMEM
7f8595bf
PA
498#endif
499
eb6db83d 500static int __init reserve_crashkernel_low(void)
0212f915
YL
501{
502#ifdef CONFIG_X86_64
f56d5578 503 unsigned long long base, low_base = 0, low_size = 0;
0212f915 504 unsigned long total_low_mem;
0212f915
YL
505 int ret;
506
97eac21b
BP
507 total_low_mem = memblock_mem_size(1UL << (32 - PAGE_SHIFT));
508
adbc742b 509 /* crashkernel=Y,low */
97eac21b 510 ret = parse_crashkernel_low(boot_command_line, total_low_mem, &low_size, &base);
f56d5578 511 if (ret) {
c729de8f
YL
512 /*
513 * two parts from lib/swiotlb.c:
94fb9334
JR
514 * -swiotlb size: user-specified with swiotlb= or default.
515 *
516 * -swiotlb overflow buffer: now hardcoded to 32k. We round it
517 * to 8M for other buffers that may need to stay low too. Also
518 * make sure we allocate enough extra low memory so that we
519 * don't run out of DMA buffers for 32-bit devices.
c729de8f 520 */
97eac21b 521 low_size = max(swiotlb_size_or_default() + (8UL << 20), 256UL << 20);
c729de8f 522 } else {
adbc742b 523 /* passed with crashkernel=0,low ? */
c729de8f 524 if (!low_size)
eb6db83d 525 return 0;
c729de8f 526 }
0212f915 527
606134f7 528 low_base = memblock_find_in_range(low_size, 1ULL << 32, low_size, CRASH_ALIGN);
0212f915 529 if (!low_base) {
eb6db83d
BH
530 pr_err("Cannot reserve %ldMB crashkernel low memory, please try smaller size.\n",
531 (unsigned long)(low_size >> 20));
532 return -ENOMEM;
0212f915 533 }
0212f915 534
6f376057
BP
535 ret = memblock_reserve(low_base, low_size);
536 if (ret) {
537 pr_err("%s: Error reserving crashkernel low memblock.\n", __func__);
538 return ret;
0212f915
YL
539 }
540
0212f915 541 pr_info("Reserving %ldMB of low memory at %ldMB for crashkernel (System low RAM: %ldMB)\n",
97eac21b
BP
542 (unsigned long)(low_size >> 20),
543 (unsigned long)(low_base >> 20),
544 (unsigned long)(total_low_mem >> 20));
545
0212f915
YL
546 crashk_low_res.start = low_base;
547 crashk_low_res.end = low_base + low_size - 1;
548 insert_resource(&iomem_resource, &crashk_low_res);
7f8595bf 549#endif
eb6db83d 550 return 0;
0212f915 551}
7f8595bf 552
29f784e3 553static void __init reserve_crashkernel(void)
ccb4defa 554{
f56d5578 555 unsigned long long crash_size, crash_base, total_mem;
55a20ee7 556 bool high = false;
ccb4defa
YL
557 int ret;
558
09c71bfd 559 total_mem = memblock_phys_mem_size();
ccb4defa 560
55a20ee7 561 /* crashkernel=XM */
97eac21b 562 ret = parse_crashkernel(boot_command_line, total_mem, &crash_size, &crash_base);
55a20ee7 563 if (ret != 0 || crash_size <= 0) {
adbc742b 564 /* crashkernel=X,high */
55a20ee7 565 ret = parse_crashkernel_high(boot_command_line, total_mem,
97eac21b 566 &crash_size, &crash_base);
55a20ee7
YL
567 if (ret != 0 || crash_size <= 0)
568 return;
569 high = true;
570 }
32105f7f
BW
571
572 /* 0 means: find the address automatically */
573 if (crash_base <= 0) {
9f4c1396 574 /*
7f8595bf 575 * kexec want bzImage is below CRASH_KERNEL_ADDR_MAX
9f4c1396 576 */
606134f7 577 crash_base = memblock_find_in_range(CRASH_ALIGN,
97eac21b
BP
578 high ? CRASH_ADDR_HIGH_MAX
579 : CRASH_ADDR_LOW_MAX,
606134f7 580 crash_size, CRASH_ALIGN);
1f5026a7 581 if (!crash_base) {
44280733 582 pr_info("crashkernel reservation failed - No suitable area found.\n");
ccb4defa
YL
583 return;
584 }
0212f915 585
32105f7f 586 } else {
44280733
YL
587 unsigned long long start;
588
9f4c1396 589 start = memblock_find_in_range(crash_base,
97eac21b
BP
590 crash_base + crash_size,
591 crash_size, 1 << 20);
44280733
YL
592 if (start != crash_base) {
593 pr_info("crashkernel reservation failed - memory is in use.\n");
ccb4defa
YL
594 return;
595 }
32105f7f 596 }
6f376057
BP
597 ret = memblock_reserve(crash_base, crash_size);
598 if (ret) {
599 pr_err("%s: Error reserving crashkernel memblock.\n", __func__);
600 return;
601 }
ccb4defa 602
eb6db83d
BH
603 if (crash_base >= (1ULL << 32) && reserve_crashkernel_low()) {
604 memblock_free(crash_base, crash_size);
605 return;
606 }
ccb4defa 607
f56d5578
BP
608 pr_info("Reserving %ldMB of memory at %ldMB for crashkernel (System RAM: %ldMB)\n",
609 (unsigned long)(crash_size >> 20),
610 (unsigned long)(crash_base >> 20),
611 (unsigned long)(total_mem >> 20));
ccb4defa 612
32105f7f
BW
613 crashk_res.start = crash_base;
614 crashk_res.end = crash_base + crash_size - 1;
615 insert_resource(&iomem_resource, &crashk_res);
ccb4defa
YL
616}
617#else
29f784e3 618static void __init reserve_crashkernel(void)
ccb4defa
YL
619{
620}
621#endif
622
bdba0e70
YL
623static struct resource standard_io_resources[] = {
624 { .name = "dma1", .start = 0x00, .end = 0x1f,
625 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
626 { .name = "pic1", .start = 0x20, .end = 0x21,
627 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
628 { .name = "timer0", .start = 0x40, .end = 0x43,
629 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
630 { .name = "timer1", .start = 0x50, .end = 0x53,
631 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
632 { .name = "keyboard", .start = 0x60, .end = 0x60,
633 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
634 { .name = "keyboard", .start = 0x64, .end = 0x64,
635 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
636 { .name = "dma page reg", .start = 0x80, .end = 0x8f,
637 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
638 { .name = "pic2", .start = 0xa0, .end = 0xa1,
639 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
640 { .name = "dma2", .start = 0xc0, .end = 0xdf,
641 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
642 { .name = "fpu", .start = 0xf0, .end = 0xff,
643 .flags = IORESOURCE_BUSY | IORESOURCE_IO }
644};
645
8fee697d 646void __init reserve_standard_io_resources(void)
bdba0e70
YL
647{
648 int i;
649
650 /* request I/O space for devices used on all i[345]86 PCs */
651 for (i = 0; i < ARRAY_SIZE(standard_io_resources); i++)
652 request_resource(&ioport_resource, &standard_io_resources[i]);
653
654}
655
042be38e
YL
656static __init void reserve_ibft_region(void)
657{
658 unsigned long addr, size = 0;
659
660 addr = find_ibft_region(&size);
661
662 if (size)
24aa0788 663 memblock_reserve(addr, size);
042be38e
YL
664}
665
a9acc536
JB
666static bool __init snb_gfx_workaround_needed(void)
667{
e43b3cec 668#ifdef CONFIG_PCI
a9acc536
JB
669 int i;
670 u16 vendor, devid;
ab3cd867 671 static const __initconst u16 snb_ids[] = {
a9acc536
JB
672 0x0102,
673 0x0112,
674 0x0122,
675 0x0106,
676 0x0116,
677 0x0126,
678 0x010a,
679 };
680
681 /* Assume no if something weird is going on with PCI */
682 if (!early_pci_allowed())
683 return false;
684
685 vendor = read_pci_config_16(0, 2, 0, PCI_VENDOR_ID);
686 if (vendor != 0x8086)
687 return false;
688
689 devid = read_pci_config_16(0, 2, 0, PCI_DEVICE_ID);
690 for (i = 0; i < ARRAY_SIZE(snb_ids); i++)
691 if (devid == snb_ids[i])
692 return true;
e43b3cec 693#endif
a9acc536
JB
694
695 return false;
696}
697
698/*
699 * Sandy Bridge graphics has trouble with certain ranges, exclude
700 * them from allocation.
701 */
702static void __init trim_snb_memory(void)
703{
ab3cd867 704 static const __initconst unsigned long bad_pages[] = {
a9acc536
JB
705 0x20050000,
706 0x20110000,
707 0x20130000,
708 0x20138000,
709 0x40004000,
710 };
711 int i;
712
713 if (!snb_gfx_workaround_needed())
714 return;
715
716 printk(KERN_DEBUG "reserving inaccessible SNB gfx pages\n");
717
718 /*
719 * Reserve all memory below the 1 MB mark that has not
720 * already been reserved.
721 */
722 memblock_reserve(0, 1<<20);
723
724 for (i = 0; i < ARRAY_SIZE(bad_pages); i++) {
725 if (memblock_reserve(bad_pages[i], PAGE_SIZE))
726 printk(KERN_WARNING "failed to reserve 0x%08lx\n",
727 bad_pages[i]);
728 }
729}
730
731/*
732 * Here we put platform-specific memory range workarounds, i.e.
733 * memory known to be corrupt or otherwise in need to be reserved on
734 * specific platforms.
735 *
736 * If this gets used more widely it could use a real dispatch mechanism.
737 */
738static void __init trim_platform_memory_ranges(void)
739{
740 trim_snb_memory();
741}
742
1b5576e6
YL
743static void __init trim_bios_range(void)
744{
745 /*
746 * A special case is the first 4Kb of memory;
747 * This is a BIOS owned area, not kernel ram, but generally
748 * not listed as such in the E820 table.
d0cd7425
PA
749 *
750 * This typically reserves additional memory (64KiB by default)
751 * since some BIOSes are known to corrupt low memory. See the
9ea77bdb 752 * Kconfig help text for X86_RESERVE_LOW.
1b5576e6 753 */
95c96084 754 e820_update_range(0, PAGE_SIZE, E820_RAM, E820_RESERVED);
d0cd7425 755
1b5576e6
YL
756 /*
757 * special case: Some BIOSen report the PC BIOS
758 * area (640->1Mb) as ram even though it is not.
759 * take them out.
760 */
761 e820_remove_range(BIOS_BEGIN, BIOS_END - BIOS_BEGIN, E820_RAM, 1);
a9acc536 762
1b5576e6
YL
763 sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);
764}
765
b422a309
YL
766/* called before trim_bios_range() to spare extra sanitize */
767static void __init e820_add_kernel_range(void)
768{
769 u64 start = __pa_symbol(_text);
770 u64 size = __pa_symbol(_end) - start;
771
772 /*
773 * Complain if .text .data and .bss are not marked as E820_RAM and
774 * attempt to fix it by adding the range. We may have a confused BIOS,
775 * or the user may have used memmap=exactmap or memmap=xxM$yyM to
776 * exclude kernel range. If we really are running on top non-RAM,
777 * we will crash later anyways.
778 */
779 if (e820_all_mapped(start, start + size, E820_RAM))
780 return;
781
782 pr_warn(".text .data .bss are not marked as E820_RAM!\n");
783 e820_remove_range(start, size, E820_RAM, 0);
784 e820_add_region(start, size, E820_RAM);
785}
786
95c96084
PA
787static unsigned reserve_low = CONFIG_X86_RESERVE_LOW << 10;
788
9ea77bdb
PA
789static int __init parse_reservelow(char *p)
790{
791 unsigned long long size;
792
793 if (!p)
794 return -EINVAL;
795
796 size = memparse(p, &p);
797
798 if (size < 4096)
799 size = 4096;
800
801 if (size > 640*1024)
802 size = 640*1024;
803
804 reserve_low = size;
805
806 return 0;
807}
808
809early_param("reservelow", parse_reservelow);
810
95c96084
PA
811static void __init trim_low_memory_range(void)
812{
813 memblock_reserve(0, ALIGN(reserve_low, PAGE_SIZE));
814}
815
f32360ef
KC
816/*
817 * Dump out kernel offset information on panic.
818 */
819static int
820dump_kernel_offset(struct notifier_block *self, unsigned long v, void *p)
821{
78cac48c
BP
822 if (kaslr_enabled()) {
823 pr_emerg("Kernel Offset: 0x%lx from 0x%lx (relocation range: 0x%lx-0x%lx)\n",
4545c898 824 kaslr_offset(),
78cac48c
BP
825 __START_KERNEL,
826 __START_KERNEL_map,
827 MODULES_VADDR-1);
828 } else {
829 pr_emerg("Kernel Offset: disabled\n");
830 }
f32360ef
KC
831
832 return 0;
833}
834
1da177e4
LT
835/*
836 * Determine if we were loaded by an EFI loader. If so, then we have also been
837 * passed the efi memmap, systab, etc., so we should use these data structures
838 * for initialization. Note, the efi init code path is determined by the
839 * global efi_enabled. This allows the same kernel image to be used on existing
840 * systems (with a traditional BIOS) as well as on EFI systems.
841 */
76934ed4
YL
842/*
843 * setup_arch - architecture-specific boot-time initializations
844 *
845 * Note: On x86_64, fixmaps are ready for use even before this is called.
846 */
847
1da177e4
LT
848void __init setup_arch(char **cmdline_p)
849{
6c902b65
YL
850 memblock_reserve(__pa_symbol(_text),
851 (unsigned long)__bss_stop - (unsigned long)_text);
852
1b8c78be
YL
853 early_reserve_initrd();
854
6c902b65
YL
855 /*
856 * At this point everything still needed from the boot loader
857 * or BIOS or kernel text should be early reserved or marked not
858 * RAM in e820. All other memory is free game.
859 */
860
76934ed4 861#ifdef CONFIG_X86_32
1da177e4 862 memcpy(&boot_cpu_data, &new_cpu_data, sizeof(new_cpu_data));
b40827fa
BP
863
864 /*
865 * copy kernel address range established so far and switch
866 * to the proper swapper page table
867 */
868 clone_pgd_range(swapper_pg_dir + KERNEL_PGD_BOUNDARY,
869 initial_page_table + KERNEL_PGD_BOUNDARY,
870 KERNEL_PGD_PTRS);
871
872 load_cr3(swapper_pg_dir);
2075244f
BD
873 /*
874 * Note: Quark X1000 CPUs advertise PGE incorrectly and require
875 * a cr3 based tlb flush, so the following __flush_tlb_all()
876 * will not flush anything because the cpu quirk which clears
877 * X86_FEATURE_PGE has not been invoked yet. Though due to the
878 * load_cr3() above the TLB has been flushed already. The
879 * quirk is invoked before subsequent calls to __flush_tlb_all()
880 * so proper operation is guaranteed.
881 */
b40827fa 882 __flush_tlb_all();
76934ed4
YL
883#else
884 printk(KERN_INFO "Command line: %s\n", boot_command_line);
885#endif
1da177e4 886
9863c90f
AK
887 /*
888 * If we have OLPC OFW, we might end up relocating the fixmap due to
889 * reserve_top(), so do this before touching the ioremap area.
890 */
fd699c76
AS
891 olpc_ofw_detect();
892
29c84391 893 early_trap_init();
9e882c92 894 early_cpu_init();
1a98fd14
JF
895 early_ioremap_init();
896
fd699c76
AS
897 setup_olpc_ofw_pgd();
898
30c82645
PA
899 ROOT_DEV = old_decode_dev(boot_params.hdr.root_dev);
900 screen_info = boot_params.screen_info;
901 edid_info = boot_params.edid_info;
76934ed4 902#ifdef CONFIG_X86_32
30c82645
PA
903 apm_info.bios = boot_params.apm_bios_info;
904 ist_info = boot_params.ist_info;
76934ed4
YL
905#endif
906 saved_video_mode = boot_params.hdr.vid_mode;
30c82645 907 bootloader_type = boot_params.hdr.type_of_loader;
5031296c
PA
908 if ((bootloader_type >> 4) == 0xe) {
909 bootloader_type &= 0xf;
910 bootloader_type |= (boot_params.hdr.ext_loader_type+0x10) << 4;
911 }
912 bootloader_version = bootloader_type & 0xf;
913 bootloader_version |= boot_params.hdr.ext_loader_ver << 4;
1da177e4
LT
914
915#ifdef CONFIG_BLK_DEV_RAM
30c82645
PA
916 rd_image_start = boot_params.hdr.ram_size & RAMDISK_IMAGE_START_MASK;
917 rd_prompt = ((boot_params.hdr.ram_size & RAMDISK_PROMPT_FLAG) != 0);
918 rd_doload = ((boot_params.hdr.ram_size & RAMDISK_LOAD_FLAG) != 0);
1da177e4 919#endif
7465252e
YL
920#ifdef CONFIG_EFI
921 if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature,
9402973d 922 EFI32_LOADER_SIGNATURE, 4)) {
3e909599 923 set_bit(EFI_BOOT, &efi.flags);
1adbfa35 924 } else if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature,
9402973d 925 EFI64_LOADER_SIGNATURE, 4)) {
3e909599
MF
926 set_bit(EFI_BOOT, &efi.flags);
927 set_bit(EFI_64BIT, &efi.flags);
7465252e 928 }
83e68189
MF
929
930 if (efi_enabled(EFI_BOOT))
931 efi_memblock_x86_reserve_range();
7465252e
YL
932#endif
933
42bbdb43 934 x86_init.oem.arch_setup();
2215e69d 935
419afdf5 936 iomem_resource.end = (1ULL << boot_cpu_data.x86_phys_bits) - 1;
0dbfafa5 937 setup_memory_map();
28bb2237
YL
938 parse_setup_data();
939
1da177e4
LT
940 copy_edd();
941
30c82645 942 if (!boot_params.hdr.root_flags)
1da177e4
LT
943 root_mountflags &= ~MS_RDONLY;
944 init_mm.start_code = (unsigned long) _text;
945 init_mm.end_code = (unsigned long) _etext;
946 init_mm.end_data = (unsigned long) _edata;
93dbda7c 947 init_mm.brk = _brk_end;
fe3d197f
DH
948
949 mpx_mm_init(&init_mm);
1da177e4 950
fc8d7826
AD
951 code_resource.start = __pa_symbol(_text);
952 code_resource.end = __pa_symbol(_etext)-1;
953 data_resource.start = __pa_symbol(_etext);
954 data_resource.end = __pa_symbol(_edata)-1;
955 bss_resource.start = __pa_symbol(__bss_start);
956 bss_resource.end = __pa_symbol(__bss_stop)-1;
1da177e4 957
516cbf37
TB
958#ifdef CONFIG_CMDLINE_BOOL
959#ifdef CONFIG_CMDLINE_OVERRIDE
960 strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE);
961#else
962 if (builtin_cmdline[0]) {
963 /* append boot loader cmdline to builtin */
964 strlcat(builtin_cmdline, " ", COMMAND_LINE_SIZE);
965 strlcat(builtin_cmdline, boot_command_line, COMMAND_LINE_SIZE);
966 strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE);
967 }
968#endif
969#endif
970
eda6da92
YL
971 strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE);
972 *cmdline_p = command_line;
973
eda6da92 974 /*
4b0f3b81
KC
975 * x86_configure_nx() is called before parse_early_param() to detect
976 * whether hardware doesn't support NX (so that the early EHCI debug
977 * console setup can safely call set_fixmap()). It may then be called
978 * again from within noexec_setup() during parsing early parameters
979 * to honor the respective command line option.
eda6da92 980 */
4763ed4d 981 x86_configure_nx();
eda6da92
YL
982
983 parse_early_param();
984
4b0f3b81 985 x86_report_nx();
0ad5bce7 986
28bb2237 987 /* after early param, so could get panic from serial */
a9ce6bc1 988 memblock_x86_reserve_range_setup_data();
28bb2237 989
76934ed4 990 if (acpi_mps_check()) {
3eb11edc 991#ifdef CONFIG_X86_LOCAL_APIC
76934ed4 992 disable_apic = 1;
3eb11edc 993#endif
988781dc 994 setup_clear_cpu_cap(X86_FEATURE_APIC);
3c999f14
YL
995 }
996
dc7c65db
LT
997#ifdef CONFIG_PCI
998 if (pci_early_dump_regs)
999 early_dump_pci_devices();
1000#endif
1001
77ea8c94
DY
1002 /* update the e820_saved too */
1003 e820_reserve_setup_data();
0dbfafa5 1004 finish_e820_parsing();
1a3f239d 1005
83e68189 1006 if (efi_enabled(EFI_BOOT))
ff0c0874
BM
1007 efi_init();
1008
2216d199 1009 dmi_scan_machine();
dd6dad42 1010 dmi_memdev_walk();
98e5e1bf 1011 dmi_set_dump_stack_arch_desc();
2216d199 1012
88b094fb
AK
1013 /*
1014 * VMware detection requires dmi to be available, so this
1015 * needs to be done after dmi_scan_machine, for the BP.
1016 */
2d826404 1017 init_hypervisor_platform();
88b094fb 1018
f7cf5a5b 1019 x86_init.resources.probe_roms();
41c094fd
YL
1020
1021 /* after parse_early_param, so could debug it */
1022 insert_resource(&iomem_resource, &code_resource);
1023 insert_resource(&iomem_resource, &data_resource);
1024 insert_resource(&iomem_resource, &bss_resource);
1025
b422a309 1026 e820_add_kernel_range();
1b5576e6 1027 trim_bios_range();
76934ed4 1028#ifdef CONFIG_X86_32
cc9f7a0c
YL
1029 if (ppro_with_ram_bug()) {
1030 e820_update_range(0x70000000ULL, 0x40000ULL, E820_RAM,
1031 E820_RESERVED);
1032 sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);
1033 printk(KERN_INFO "fixed physical RAM map:\n");
1034 e820_print_map("bad_ppro");
1035 }
76934ed4
YL
1036#else
1037 early_gart_iommu_check();
1038#endif
cc9f7a0c 1039
7b2a0a6c
YL
1040 /*
1041 * partially used pages are not usable - thus
1042 * we are rounding upwards:
1043 */
f361a450 1044 max_pfn = e820_end_of_ram_pfn();
7b2a0a6c 1045
093af8d7
YL
1046 /* update e820 for memory not covered by WB MTRRs */
1047 mtrr_bp_init();
2dc807b3 1048 if (mtrr_trim_uncached_memory(max_pfn))
f361a450 1049 max_pfn = e820_end_of_ram_pfn();
76c32418 1050
8dd33030
IM
1051 max_possible_pfn = max_pfn;
1052
76934ed4 1053#ifdef CONFIG_X86_32
4e29684c 1054 /* max_low_pfn get updated here */
2ec65f8b 1055 find_low_pfn_range();
76934ed4 1056#else
06cd9a7d 1057 check_x2apic();
76934ed4
YL
1058
1059 /* How many end-of-memory variables you have, grandma! */
1060 /* need this before calling reserve_initrd */
f361a450
YL
1061 if (max_pfn > (1UL<<(32 - PAGE_SHIFT)))
1062 max_low_pfn = e820_end_of_low_ram_pfn();
1063 else
1064 max_low_pfn = max_pfn;
1065
76934ed4 1066 high_memory = (void *)__va(max_pfn * PAGE_SIZE - 1) + 1;
5394f80f
JF
1067#endif
1068
893f38d1
YL
1069 /*
1070 * Find and reserve possible boot-time SMP configuration:
1071 */
1072 find_smp_config();
1073
042be38e
YL
1074 reserve_ibft_region();
1075
8d57470d
YL
1076 early_alloc_pgt_buf();
1077
72d7c3b3
YL
1078 /*
1079 * Need to conclude brk, before memblock_x86_fill()
1080 * it could use memblock_find_in_range, could overlap with
1081 * brk area.
1082 */
1083 reserve_brk();
1084
e5f15b45
YL
1085 cleanup_highmap();
1086
2449f343 1087 memblock_set_current_limit(ISA_END_ADDRESS);
72d7c3b3
YL
1088 memblock_x86_fill();
1089
0f96a99d
TI
1090 if (efi_enabled(EFI_BOOT)) {
1091 efi_fake_memmap();
b05b9f5f 1092 efi_find_mirror();
0f96a99d 1093 }
b05b9f5f 1094
916f676f
MG
1095 /*
1096 * The EFI specification says that boot service code won't be called
1097 * after ExitBootServices(). This is, in fact, a lie.
1098 */
83e68189 1099 if (efi_enabled(EFI_MEMMAP))
916f676f
MG
1100 efi_reserve_boot_services();
1101
72d7c3b3
YL
1102 /* preallocate 4k for mptable mpc */
1103 early_reserve_e820_mpc_new();
1104
1105#ifdef CONFIG_X86_CHECK_BIOS_CORRUPTION
1106 setup_bios_corruption_check();
1107#endif
1108
10054230 1109#ifdef CONFIG_X86_32
365811d6
BH
1110 printk(KERN_DEBUG "initial memory mapped: [mem 0x00000000-%#010lx]\n",
1111 (max_pfn_mapped<<PAGE_SHIFT) - 1);
10054230 1112#endif
72d7c3b3 1113
4f7b9226 1114 reserve_real_mode();
893f38d1 1115
a9acc536 1116 trim_platform_memory_ranges();
95c96084 1117 trim_low_memory_range();
a9acc536 1118
22ddfcaa 1119 init_mem_mapping();
1bbbbe77 1120
8170e6be 1121 early_trap_pf_init();
1bbbbe77 1122
4f7b9226 1123 setup_real_mode();
1bbbbe77 1124
4ce7a869 1125 memblock_set_current_limit(get_max_mapped());
4e29684c 1126
e7b37895
YL
1127 /*
1128 * NOTE: On x86-32, only from this point on, fixmaps are ready for use.
1129 */
1130
1131#ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT
1132 if (init_ohci1394_dma_early)
1133 init_ohci1394_dma_on_all_controllers();
1134#endif
162a7e75
MT
1135 /* Allocate bigger log buffer */
1136 setup_log_buf(1);
e7b37895 1137
2ec65f8b
YL
1138 reserve_initrd();
1139
3dfd8235 1140#if defined(CONFIG_ACPI) && defined(CONFIG_BLK_DEV_INITRD)
53aac44c 1141 acpi_initrd_override((void *)initrd_start, initrd_end - initrd_start);
3dfd8235 1142#endif
53aac44c 1143
76934ed4 1144 vsmp_init();
76934ed4 1145
1c6e5503
YL
1146 io_delay_init();
1147
1c6e5503
YL
1148 /*
1149 * Parse the ACPI tables for possible boot-time SMP configuration.
1150 */
20e6926d
YL
1151 acpi_boot_table_init();
1152
1153 early_acpi_boot_init();
1154
d8fc3afc 1155 initmem_init();
3c325f82 1156 dma_contiguous_reserve(max_pfn_mapped << PAGE_SHIFT);
fa591c4a
TC
1157
1158 /*
1159 * Reserve memory for crash kernel after SRAT is parsed so that it
1160 * won't consume hotpluggable memory.
1161 */
1162 reserve_crashkernel();
1163
6f2a7536 1164 memblock_find_dma_reserve();
91467bdf 1165
90993cdd 1166#ifdef CONFIG_KVM_GUEST
790c73f6
GOC
1167 kvmclock_init();
1168#endif
1169
7737b215 1170 x86_init.paging.pagetable_init();
f212ec4b 1171
ef7f0d6a
AR
1172 kasan_init();
1173
4da9484b
PA
1174 if (boot_cpu_data.cpuid_level >= 0) {
1175 /* A CPU has %cr4 if and only if it has CPUID */
1e02ce4c 1176 mmu_cr4_features = __read_cr4();
cda846f1
JS
1177 if (trampoline_cr4_features)
1178 *trampoline_cr4_features = mmu_cr4_features;
4da9484b
PA
1179 }
1180
b40827fa
BP
1181#ifdef CONFIG_X86_32
1182 /* sync back kernel address range */
1183 clone_pgd_range(initial_page_table + KERNEL_PGD_BOUNDARY,
1184 swapper_pg_dir + KERNEL_PGD_BOUNDARY,
1185 KERNEL_PGD_PTRS);
f5f3497c
PB
1186
1187 /*
1188 * sync back low identity map too. It is used for example
1189 * in the 32-bit EFI stub.
1190 */
1191 clone_pgd_range(initial_page_table,
1192 swapper_pg_dir + KERNEL_PGD_BOUNDARY,
68accac3 1193 min(KERNEL_PGD_PTRS, KERNEL_PGD_BOUNDARY));
b40827fa 1194#endif
fd89a137 1195
31625340
JC
1196 tboot_probe();
1197
76934ed4 1198 map_vsyscall();
76934ed4 1199
1a3f239d 1200 generic_apic_probe();
1da177e4 1201
54ef3400 1202 early_quirks();
d44647b0 1203
295deae4
YL
1204 /*
1205 * Read APIC and some other early information from ACPI tables.
1206 */
1da177e4 1207 acpi_boot_init();
efafc8b2 1208 sfi_init();
a906fdaa 1209 x86_dtb_init();
04606618 1210
295deae4
YL
1211 /*
1212 * get boot-time SMP configuration:
1213 */
e0da3364
YL
1214 if (smp_found_config)
1215 get_smp_config();
76934ed4 1216
329513a3 1217 prefill_possible_map();
301e6190 1218
5f4765f9 1219 init_cpu_to_node();
5f4765f9 1220
76934ed4 1221 init_apic_mappings();
ca1b8862 1222 io_apic_init_mappings();
9d6a4d08 1223
295deae4 1224 kvm_guest_init();
1da177e4 1225
41c094fd 1226 e820_reserve_resources();
bf62f398 1227 e820_mark_nosave_regions(max_low_pfn);
1da177e4 1228
8fee697d 1229 x86_init.resources.reserve_resources();
41c094fd
YL
1230
1231 e820_setup_gap();
1232
1da177e4
LT
1233#ifdef CONFIG_VT
1234#if defined(CONFIG_VGA_CONSOLE)
83e68189 1235 if (!efi_enabled(EFI_BOOT) || (efi_mem_type(0xa0000) != EFI_CONVENTIONAL_MEMORY))
1da177e4
LT
1236 conswitchp = &vga_con;
1237#elif defined(CONFIG_DUMMY_CONSOLE)
1238 conswitchp = &dummy_con;
1239#endif
1240#endif
6f30c1ac 1241 x86_init.oem.banner();
a2202aa2 1242
6b617e22
FT
1243 x86_init.timers.wallclock_init();
1244
a2202aa2 1245 mcheck_init();
f49aa448 1246
dc326fca 1247 arch_init_ideal_nops();
b3c869d3
JS
1248
1249 register_refined_jiffies(CLOCK_TICK_RATE);
5189c2a7
OJ
1250
1251#ifdef CONFIG_EFI
a5d90c92
BP
1252 if (efi_enabled(EFI_BOOT))
1253 efi_apply_memmap_quirks();
5189c2a7 1254#endif
1da177e4 1255}
5649b7c3 1256
9be1b56a
IM
1257#ifdef CONFIG_X86_32
1258
8fee697d
TG
1259static struct resource video_ram_resource = {
1260 .name = "Video RAM area",
1261 .start = 0xa0000,
1262 .end = 0xbffff,
1263 .flags = IORESOURCE_BUSY | IORESOURCE_MEM
9be1b56a
IM
1264};
1265
8fee697d 1266void __init i386_reserve_resources(void)
9be1b56a 1267{
8fee697d
TG
1268 request_resource(&iomem_resource, &video_ram_resource);
1269 reserve_standard_io_resources();
9be1b56a
IM
1270}
1271
9be1b56a 1272#endif /* CONFIG_X86_32 */
f32360ef
KC
1273
1274static struct notifier_block kernel_offset_notifier = {
1275 .notifier_call = dump_kernel_offset
1276};
1277
1278static int __init register_kernel_offset_dumper(void)
1279{
1280 atomic_notifier_chain_register(&panic_notifier_list,
1281 &kernel_offset_notifier);
1282 return 0;
1283}
1284__initcall(register_kernel_offset_dumper);