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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07002 * 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>
Andy Whitcroft05b79bd2005-06-23 00:07:57 -070026#include <linux/mmzone.h>
Jon Smirl894673e2006-07-10 04:44:13 -070027#include <linux/screen_info.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070028#include <linux/ioport.h>
29#include <linux/acpi.h>
Feng Tangefafc8b2009-08-14 15:23:29 -040030#include <linux/sfi.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070031#include <linux/apm_bios.h>
32#include <linux/initrd.h>
33#include <linux/bootmem.h>
Yinghai Lu72d7c3b2010-08-25 13:39:17 -070034#include <linux/memblock.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070035#include <linux/seq_file.h>
36#include <linux/console.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070037#include <linux/root_dev.h>
38#include <linux/highmem.h>
Paul Gortmaker186f4362016-07-13 20:18:56 -040039#include <linux/export.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070040#include <linux/efi.h>
41#include <linux/init.h>
42#include <linux/edd.h>
Konrad Rzeszutek138fe4e2008-04-09 19:50:41 -070043#include <linux/iscsi_ibft.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070044#include <linux/nodemask.h>
Eric W. Biederman1bc3b912005-06-25 14:58:01 -070045#include <linux/kexec.h>
Andi Kleene9928672006-01-11 22:43:33 +010046#include <linux/dmi.h>
Dave Hansen22a98352006-03-27 01:16:04 -080047#include <linux/pfn.h>
Thomas Gleixner376ff032008-01-30 13:30:16 +010048#include <linux/pci.h>
Yinghai Lu46d671b2008-06-25 17:51:29 -070049#include <asm/pci-direct.h>
Bernhard Kaindlf212ec42008-01-30 13:34:11 +010050#include <linux/init_ohci1394_dma.h>
Glauber de Oliveira Costa790c73f2008-02-15 17:52:48 -020051#include <linux/kvm_para.h>
Marek Szyprowski0a2b9a62011-12-29 13:09:51 +010052#include <linux/dma-contiguous.h>
Petr Tesarik3db3eb22018-04-25 12:08:35 +020053#include <xen/xen.h>
Eric W. Biederman1bc3b912005-06-25 14:58:01 -070054
Yinghai Lu46d671b2008-06-25 17:51:29 -070055#include <linux/errno.h>
56#include <linux/kernel.h>
57#include <linux/stddef.h>
58#include <linux/unistd.h>
59#include <linux/ptrace.h>
Yinghai Lu46d671b2008-06-25 17:51:29 -070060#include <linux/user.h>
61#include <linux/delay.h>
Yinghai Lu46d671b2008-06-25 17:51:29 -070062
63#include <linux/kallsyms.h>
Yinghai Lu46d671b2008-06-25 17:51:29 -070064#include <linux/cpufreq.h>
65#include <linux/dma-mapping.h>
66#include <linux/ctype.h>
67#include <linux/uaccess.h>
68
69#include <linux/percpu.h>
70#include <linux/crash_dump.h>
Shane Wang69575d32009-09-01 18:25:07 -070071#include <linux/tboot.h>
John Stultzb3c869d2012-09-04 12:42:27 -040072#include <linux/jiffies.h>
Tom Lendackyb9d05202017-07-17 16:10:11 -050073#include <linux/mem_encrypt.h>
Yinghai Lu46d671b2008-06-25 17:51:29 -070074
Lu Baolu1b5aeeb2017-03-21 16:01:31 +080075#include <linux/usb/xhci-dbgp.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070076#include <video/edid.h>
Eric W. Biederman1bc3b912005-06-25 14:58:01 -070077
Yinghai Lu093af8d2008-01-30 13:33:32 +010078#include <asm/mtrr.h>
Eric W. Biederman9635b472005-06-25 14:57:41 -070079#include <asm/apic.h>
Jarkko Sakkinen084ee1c62012-05-08 21:22:26 +030080#include <asm/realmode.h>
Ingo Molnar66441bd2017-01-27 10:27:10 +010081#include <asm/e820/api.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070082#include <asm/mpspec.h>
83#include <asm/setup.h>
Yinghai Lu55f26232008-06-25 17:54:23 -070084#include <asm/efi.h>
Ingo Molnar8e6dafd2009-02-23 00:34:39 +010085#include <asm/timer.h>
86#include <asm/i8259.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070087#include <asm/sections.h>
88#include <asm/io_apic.h>
89#include <asm/ist.h>
Ingo Molnar1164dd02009-01-28 19:34:09 +010090#include <asm/setup_arch.h>
Alexey Starikovskiyce3fe6b2008-03-17 22:08:17 +030091#include <asm/bios_ebda.h>
Bernhard Walle00bf4092007-10-21 16:42:01 -070092#include <asm/cacheflush.h>
Alexander van Heukelum2fde61f2008-03-04 19:57:42 +010093#include <asm/processor.h>
Yinghai Lucc9f7a02008-06-16 16:11:08 -070094#include <asm/bugs.h>
Andrey Ryabininef7f0d62015-02-13 14:39:25 -080095#include <asm/kasan.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070096
Yinghai Lu46d671b2008-06-25 17:51:29 -070097#include <asm/vsyscall.h>
Jaswinder Singh Rajput6e5385d2009-01-07 18:11:35 +053098#include <asm/cpu.h>
Yinghai Lu46d671b2008-06-25 17:51:29 -070099#include <asm/desc.h>
100#include <asm/dma.h>
FUJITA Tomonori46a7fa22008-07-11 10:23:42 +0900101#include <asm/iommu.h>
Joerg Roedel1d9b16d2008-11-27 18:39:15 +0100102#include <asm/gart.h>
Yinghai Lu46d671b2008-06-25 17:51:29 -0700103#include <asm/mmu_context.h>
104#include <asm/proto.h>
105
Yinghai Lu46d671b2008-06-25 17:51:29 -0700106#include <asm/paravirt.h>
Alok Kataria88b094f2008-10-27 10:41:46 -0700107#include <asm/hypervisor.h>
Andres Salomonfd699c72010-06-18 17:46:53 -0400108#include <asm/olpc_ofw.h>
Yinghai Lu46d671b2008-06-25 17:51:29 -0700109
110#include <asm/percpu.h>
Yinghai Lu46d671b2008-06-25 17:51:29 -0700111#include <asm/topology.h>
112#include <asm/apicdef.h>
Andreas Herrmann23ac4ae2010-09-17 18:03:43 +0200113#include <asm/amd_nb.h>
Yong Wanga2202aa2009-11-10 09:38:24 +0800114#include <asm/mce.h>
Jason Baronf49aa442010-09-17 11:08:51 -0400115#include <asm/alternative.h>
Sebastian Andrzej Siewiorda6b7372011-02-22 21:07:37 +0100116#include <asm/prom.h>
Borislav Petkov9a2bc332015-10-20 11:54:44 +0200117#include <asm/microcode.h>
Thomas Garnier0483e1f2016-06-21 17:47:02 -0700118#include <asm/kaslr.h>
Josh Poimboeufee9f8fc2017-07-24 18:36:57 -0500119#include <asm/unwind.h>
Yinghai Lu46d671b2008-06-25 17:51:29 -0700120
Pekka Enberg2b723942009-04-28 16:00:49 +0300121/*
Jacob Shin66520eb2012-11-16 19:38:52 -0800122 * max_low_pfn_mapped: highest direct mapped pfn under 4GB
123 * max_pfn_mapped: highest direct mapped pfn over 4GB
124 *
Ingo Molnar09821ff2017-01-28 17:09:33 +0100125 * The direct mapping only covers E820_TYPE_RAM regions, so the ranges and gaps are
Jacob Shin66520eb2012-11-16 19:38:52 -0800126 * represented by pfn_mapped
Pekka Enberg2b723942009-04-28 16:00:49 +0300127 */
128unsigned long max_low_pfn_mapped;
129unsigned long max_pfn_mapped;
130
Thadeu Lima de Souza Cascardoe808bae2010-02-09 21:38:45 -0200131#ifdef CONFIG_DMI
Jeremy Fitzhardinge796216a2009-03-12 16:09:49 -0700132RESERVE_BRK(dmi_alloc, 65536);
Thadeu Lima de Souza Cascardoe808bae2010-02-09 21:38:45 -0200133#endif
Jeremy Fitzhardinge796216a2009-03-12 16:09:49 -0700134
Ingo Molnarc0b58422009-01-27 17:13:05 +0100135
Jeremy Fitzhardinge93dbda72009-02-26 17:35:44 -0800136static __initdata unsigned long _brk_start = (unsigned long)__brk_base;
137unsigned long _brk_end = (unsigned long)__brk_base;
138
Yinghai Lu217b8ce2008-06-25 17:55:20 -0700139struct boot_params boot_params;
Yinghai Lu217b8ce2008-06-25 17:55:20 -0700140
Linus Torvalds4046d6e2016-04-14 11:18:57 -0700141/*
142 * Machine setup..
143 */
144static struct resource data_resource = {
145 .name = "Kernel data",
146 .start = 0,
147 .end = 0,
148 .flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM
149};
150
151static struct resource code_resource = {
152 .name = "Kernel code",
153 .start = 0,
154 .end = 0,
155 .flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM
156};
157
158static struct resource bss_resource = {
159 .name = "Kernel bss",
160 .start = 0,
161 .end = 0,
162 .flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM
163};
164
165
Yinghai Lu7dea23e2008-06-25 17:50:06 -0700166#ifdef CONFIG_X86_32
Mathias Krause64158132017-02-12 22:12:08 +0100167/* cpu data as detected by the assembly code in head_32.S */
168struct cpuinfo_x86 new_cpu_data;
169
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170/* common cpu data for all cpus */
Mathias Krause64158132017-02-12 22:12:08 +0100171struct cpuinfo_x86 boot_cpu_data __read_mostly;
Alexey Dobriyan129f6942005-06-23 00:08:33 -0700172EXPORT_SYMBOL(boot_cpu_data);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173
Alexey Starikovskiy0c254e32008-03-27 23:55:04 +0300174unsigned int def_to_bigsmp;
175
Linus Torvalds1da177e2005-04-16 15:20:36 -0700176/* for MCA, but anyone else can use it if they want */
177unsigned int machine_id;
178unsigned int machine_submodel_id;
179unsigned int BIOS_revision;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180
Yinghai Lu7dea23e2008-06-25 17:50:06 -0700181struct apm_info apm_info;
182EXPORT_SYMBOL(apm_info);
183
184#if defined(CONFIG_X86_SPEEDSTEP_SMI) || \
185 defined(CONFIG_X86_SPEEDSTEP_SMI_MODULE)
186struct ist_info ist_info;
187EXPORT_SYMBOL(ist_info);
188#else
189struct ist_info ist_info;
190#endif
191
192#else
Kirill A. Shutemov162434e2018-02-14 14:16:54 +0300193struct cpuinfo_x86 boot_cpu_data __read_mostly;
Yinghai Lu7dea23e2008-06-25 17:50:06 -0700194EXPORT_SYMBOL(boot_cpu_data);
195#endif
196
197
198#if !defined(CONFIG_X86_PAE) || defined(CONFIG_X86_64)
Kees Cook404f6aa2016-08-08 16:29:06 -0700199__visible unsigned long mmu_cr4_features __ro_after_init;
Yinghai Lu7dea23e2008-06-25 17:50:06 -0700200#else
Kees Cook404f6aa2016-08-08 16:29:06 -0700201__visible unsigned long mmu_cr4_features __ro_after_init = X86_CR4_PAE;
Yinghai Lu7dea23e2008-06-25 17:50:06 -0700202#endif
203
H. Peter Anvin50312962009-05-07 16:54:11 -0700204/* Boot loader ID and version as integers, for the benefit of proc_dointvec */
205int bootloader_type, bootloader_version;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700206
Linus Torvalds1da177e2005-04-16 15:20:36 -0700207/*
208 * Setup options
209 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210struct screen_info screen_info;
Alexey Dobriyan129f6942005-06-23 00:08:33 -0700211EXPORT_SYMBOL(screen_info);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212struct edid_info edid_info;
Antonino A. Daplas5e518d72005-09-09 13:04:34 -0700213EXPORT_SYMBOL_GPL(edid_info);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215extern int root_mountflags;
216
Pavel Macheke44b7b72008-04-10 23:28:10 +0200217unsigned long saved_video_mode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700218
H. Peter Anvincf8fa922008-01-30 13:32:51 +0100219#define RAMDISK_IMAGE_START_MASK 0x07FF
Linus Torvalds1da177e2005-04-16 15:20:36 -0700220#define RAMDISK_PROMPT_FLAG 0x8000
H. Peter Anvincf8fa922008-01-30 13:32:51 +0100221#define RAMDISK_LOAD_FLAG 0x4000
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222
Alon Bar-Lev4e498b62007-02-12 00:54:11 -0800223static char __initdata command_line[COMMAND_LINE_SIZE];
Tim Bird516cbf32008-08-12 12:52:36 -0700224#ifdef CONFIG_CMDLINE_BOOL
225static char __initdata builtin_cmdline[COMMAND_LINE_SIZE] = CONFIG_CMDLINE;
226#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228#if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE)
229struct edd edd;
230#ifdef CONFIG_EDD_MODULE
231EXPORT_SYMBOL(edd);
232#endif
233/**
234 * copy_edd() - Copy the BIOS EDD information
235 * from boot_params into a safe place.
236 *
237 */
Helight.Xu9eaa1922009-11-30 18:33:51 +0800238static inline void __init copy_edd(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239{
H. Peter Anvin30c82642007-10-15 17:13:22 -0700240 memcpy(edd.mbr_signature, boot_params.edd_mbr_sig_buffer,
241 sizeof(edd.mbr_signature));
242 memcpy(edd.edd_info, boot_params.eddbuf, sizeof(edd.edd_info));
243 edd.mbr_signature_nr = boot_params.edd_mbr_sig_buf_entries;
244 edd.edd_info_nr = boot_params.eddbuf_entries;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700245}
246#else
Helight.Xu9eaa1922009-11-30 18:33:51 +0800247static inline void __init copy_edd(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248{
249}
250#endif
251
H. Peter Anvin5368a2b2009-03-14 17:19:51 -0700252void * __init extend_brk(size_t size, size_t align)
253{
254 size_t mask = align - 1;
255 void *ret;
256
257 BUG_ON(_brk_start == 0);
258 BUG_ON(align & mask);
259
260 _brk_end = (_brk_end + mask) & ~mask;
261 BUG_ON((char *)(_brk_end + size) > __brk_limit);
262
263 ret = (void *)_brk_end;
264 _brk_end += size;
265
266 memset(ret, 0, size);
267
268 return ret;
269}
270
Yinghai Lu148b2092012-11-16 19:39:08 -0800271#ifdef CONFIG_X86_32
Yinghai Lue5f15b42011-02-18 11:30:30 +0000272static void __init cleanup_highmap(void)
Yinghai Luf005fe12010-12-27 16:48:32 -0800273{
274}
Pekka J Enberg854c8792009-06-22 17:39:41 +0300275#endif
276
H. Peter Anvin5368a2b2009-03-14 17:19:51 -0700277static void __init reserve_brk(void)
278{
279 if (_brk_end > _brk_start)
Alexander Duyckfc8d7822012-11-16 13:57:13 -0800280 memblock_reserve(__pa_symbol(_brk_start),
281 _brk_end - _brk_start);
H. Peter Anvin5368a2b2009-03-14 17:19:51 -0700282
283 /* Mark brk area as locked down and no longer taking any
284 new allocations */
285 _brk_start = 0;
286}
287
Borislav Petkov5aa3d712013-12-04 20:50:42 +0100288u64 relocated_ramdisk;
289
H. Peter Anvincf8fa922008-01-30 13:32:51 +0100290#ifdef CONFIG_BLK_DEV_INITRD
291
Yinghai Lua8a51a82013-01-24 12:19:56 -0800292static u64 __init get_ramdisk_image(void)
293{
294 u64 ramdisk_image = boot_params.hdr.ramdisk_image;
295
Yinghai Luee92d812013-01-28 20:16:44 -0800296 ramdisk_image |= (u64)boot_params.ext_ramdisk_image << 32;
297
Yinghai Lua8a51a82013-01-24 12:19:56 -0800298 return ramdisk_image;
299}
300static u64 __init get_ramdisk_size(void)
301{
302 u64 ramdisk_size = boot_params.hdr.ramdisk_size;
303
Yinghai Luee92d812013-01-28 20:16:44 -0800304 ramdisk_size |= (u64)boot_params.ext_ramdisk_size << 32;
305
Yinghai Lua8a51a82013-01-24 12:19:56 -0800306 return ramdisk_size;
307}
308
Yinghai Lueb1379c2008-06-25 17:49:26 -0700309static void __init relocate_initrd(void)
H. Peter Anvincf8fa922008-01-30 13:32:51 +0100310{
Yinghai Luc967da62010-03-28 19:42:55 -0700311 /* Assume only end is not page aligned */
Yinghai Lua8a51a82013-01-24 12:19:56 -0800312 u64 ramdisk_image = get_ramdisk_image();
313 u64 ramdisk_size = get_ramdisk_size();
Yinghai Luc967da62010-03-28 19:42:55 -0700314 u64 area_size = PAGE_ALIGN(ramdisk_size);
H. Peter Anvincf8fa922008-01-30 13:32:51 +0100315
Yinghai Lue8c57d42012-11-16 19:38:51 -0800316 /* We need to move the initrd down into directly mapped mem */
Borislav Petkov5aa3d712013-12-04 20:50:42 +0100317 relocated_ramdisk = memblock_find_in_range(0, PFN_PHYS(max_pfn_mapped),
318 area_size, PAGE_SIZE);
H. Peter Anvincf8fa922008-01-30 13:32:51 +0100319
Borislav Petkov5aa3d712013-12-04 20:50:42 +0100320 if (!relocated_ramdisk)
Yinghai Lu3945e2c2008-05-25 10:00:09 -0700321 panic("Cannot find place for new RAMDISK of size %lld\n",
Borislav Petkov5aa3d712013-12-04 20:50:42 +0100322 ramdisk_size);
Yinghai Lu3945e2c2008-05-25 10:00:09 -0700323
Yinghai Lue8c57d42012-11-16 19:38:51 -0800324 /* Note: this includes all the mem currently occupied by
H. Peter Anvincf8fa922008-01-30 13:32:51 +0100325 the initrd, we rely on that fact to keep the data intact. */
Borislav Petkov5aa3d712013-12-04 20:50:42 +0100326 memblock_reserve(relocated_ramdisk, area_size);
327 initrd_start = relocated_ramdisk + PAGE_OFFSET;
H. Peter Anvincf8fa922008-01-30 13:32:51 +0100328 initrd_end = initrd_start + ramdisk_size;
Bjorn Helgaas365811d2012-05-29 15:06:29 -0700329 printk(KERN_INFO "Allocated new RAMDISK: [mem %#010llx-%#010llx]\n",
Borislav Petkov5aa3d712013-12-04 20:50:42 +0100330 relocated_ramdisk, relocated_ramdisk + ramdisk_size - 1);
H. Peter Anvincf8fa922008-01-30 13:32:51 +0100331
Mark Salter5dd2c4b2015-09-08 15:03:07 -0700332 copy_from_early_mem((void *)initrd_start, ramdisk_image, ramdisk_size);
H. Peter Anvincf8fa922008-01-30 13:32:51 +0100333
Bjorn Helgaas365811d2012-05-29 15:06:29 -0700334 printk(KERN_INFO "Move RAMDISK from [mem %#010llx-%#010llx] to"
335 " [mem %#010llx-%#010llx]\n",
Yinghai Luba5b14cc2008-05-21 18:40:18 -0700336 ramdisk_image, ramdisk_image + ramdisk_size - 1,
Borislav Petkov5aa3d712013-12-04 20:50:42 +0100337 relocated_ramdisk, relocated_ramdisk + ramdisk_size - 1);
Yinghai Lueb1379c2008-06-25 17:49:26 -0700338}
Yinghai Lu9a27f5c2008-06-13 20:07:03 -0700339
Yinghai Lu1b8c78b2013-01-24 12:19:55 -0800340static void __init early_reserve_initrd(void)
341{
342 /* Assume only end is not page aligned */
Yinghai Lua8a51a82013-01-24 12:19:56 -0800343 u64 ramdisk_image = get_ramdisk_image();
344 u64 ramdisk_size = get_ramdisk_size();
Yinghai Lu1b8c78b2013-01-24 12:19:55 -0800345 u64 ramdisk_end = PAGE_ALIGN(ramdisk_image + ramdisk_size);
346
347 if (!boot_params.hdr.type_of_loader ||
348 !ramdisk_image || !ramdisk_size)
349 return; /* No initrd provided by bootloader */
350
351 memblock_reserve(ramdisk_image, ramdisk_end - ramdisk_image);
352}
Yinghai Lueb1379c2008-06-25 17:49:26 -0700353static void __init reserve_initrd(void)
354{
Yinghai Luc967da62010-03-28 19:42:55 -0700355 /* Assume only end is not page aligned */
Yinghai Lua8a51a82013-01-24 12:19:56 -0800356 u64 ramdisk_image = get_ramdisk_image();
357 u64 ramdisk_size = get_ramdisk_size();
Yinghai Luc967da62010-03-28 19:42:55 -0700358 u64 ramdisk_end = PAGE_ALIGN(ramdisk_image + ramdisk_size);
Yinghai Lue8c57d42012-11-16 19:38:51 -0800359 u64 mapped_size;
Yinghai Lueb1379c2008-06-25 17:49:26 -0700360
361 if (!boot_params.hdr.type_of_loader ||
362 !ramdisk_image || !ramdisk_size)
363 return; /* No initrd provided by bootloader */
364
365 initrd_start = 0;
366
Yinghai Lu595ad9a2013-01-24 12:20:09 -0800367 mapped_size = memblock_mem_size(max_pfn_mapped);
Yinghai Lue8c57d42012-11-16 19:38:51 -0800368 if (ramdisk_size >= (mapped_size>>1))
Peter Jonesab7b64e2012-05-16 13:43:26 -0400369 panic("initrd too large to handle, "
370 "disabling initrd (%lld needed, %lld available)\n",
Yinghai Lue8c57d42012-11-16 19:38:51 -0800371 ramdisk_size, mapped_size>>1);
Yinghai Lueb1379c2008-06-25 17:49:26 -0700372
Bjorn Helgaas365811d2012-05-29 15:06:29 -0700373 printk(KERN_INFO "RAMDISK: [mem %#010llx-%#010llx]\n", ramdisk_image,
374 ramdisk_end - 1);
Yinghai Lueb1379c2008-06-25 17:49:26 -0700375
Yinghai Lu74f27652012-11-16 19:38:53 -0800376 if (pfn_range_is_mapped(PFN_DOWN(ramdisk_image),
Yinghai Lue8c57d42012-11-16 19:38:51 -0800377 PFN_DOWN(ramdisk_end))) {
378 /* All are mapped, easy case */
Yinghai Lueb1379c2008-06-25 17:49:26 -0700379 initrd_start = ramdisk_image + PAGE_OFFSET;
380 initrd_end = initrd_start + ramdisk_size;
381 return;
382 }
383
Yinghai Lueb1379c2008-06-25 17:49:26 -0700384 relocate_initrd();
Yinghai Lu8c5dd8f2009-06-04 19:14:22 -0700385
Tejun Heo24aa0782011-07-12 11:16:06 +0200386 memblock_free(ramdisk_image, ramdisk_end - ramdisk_image);
H. Peter Anvincf8fa922008-01-30 13:32:51 +0100387}
Lv Zhengaf06f8b2016-04-11 10:13:27 +0800388
Yinghai Lu225c37d2008-06-22 02:46:58 -0700389#else
Yinghai Lu1b8c78b2013-01-24 12:19:55 -0800390static void __init early_reserve_initrd(void)
391{
392}
Yinghai Lueb1379c2008-06-25 17:49:26 -0700393static void __init reserve_initrd(void)
Yinghai Lu225c37d2008-06-22 02:46:58 -0700394{
395}
H. Peter Anvincf8fa922008-01-30 13:32:51 +0100396#endif /* CONFIG_BLK_DEV_INITRD */
397
Yinghai Lu29f784e2008-06-25 18:00:22 -0700398static void __init parse_setup_data(void)
Yinghai Lu257b0fd2008-06-25 17:56:22 -0700399{
400 struct setup_data *data;
Linn Crosetto30e46b52013-08-13 15:46:41 -0600401 u64 pa_data, pa_next;
Yinghai Lu257b0fd2008-06-25 17:56:22 -0700402
Yinghai Lu257b0fd2008-06-25 17:56:22 -0700403 pa_data = boot_params.hdr.setup_data;
404 while (pa_data) {
WANG Chao73898822015-01-07 18:55:48 +0800405 u32 data_len, data_type;
Sebastian Andrzej Siewiorf1c2b352011-02-22 21:07:36 +0100406
WANG Chao73898822015-01-07 18:55:48 +0800407 data = early_memremap(pa_data, sizeof(*data));
Sebastian Andrzej Siewiorf1c2b352011-02-22 21:07:36 +0100408 data_len = data->len + sizeof(struct setup_data);
Linn Crosetto30e46b52013-08-13 15:46:41 -0600409 data_type = data->type;
410 pa_next = data->next;
Juergen Gross8d4a40b2015-02-24 10:13:28 +0100411 early_memunmap(data, sizeof(*data));
Sebastian Andrzej Siewiorf1c2b352011-02-22 21:07:36 +0100412
Linn Crosetto30e46b52013-08-13 15:46:41 -0600413 switch (data_type) {
Yinghai Lu257b0fd2008-06-25 17:56:22 -0700414 case SETUP_E820_EXT:
Ingo Molnar914053c2017-01-28 13:18:40 +0100415 e820__memory_setup_extended(pa_data, data_len);
Yinghai Lu257b0fd2008-06-25 17:56:22 -0700416 break;
Sebastian Andrzej Siewiorda6b7372011-02-22 21:07:37 +0100417 case SETUP_DTB:
418 add_dtb(pa_data);
Yinghai Lu257b0fd2008-06-25 17:56:22 -0700419 break;
Dave Young1fec0532013-12-20 18:02:19 +0800420 case SETUP_EFI:
421 parse_efi_setup(pa_data, data_len);
422 break;
Yinghai Lu257b0fd2008-06-25 17:56:22 -0700423 default:
424 break;
425 }
Linn Crosetto30e46b52013-08-13 15:46:41 -0600426 pa_data = pa_next;
Yinghai Lu257b0fd2008-06-25 17:56:22 -0700427 }
428}
429
Yinghai Lua9ce6bc2010-08-25 13:39:17 -0700430static void __init memblock_x86_reserve_range_setup_data(void)
Yinghai Lua0a0bec2008-07-03 11:37:13 -0700431{
432 struct setup_data *data;
433 u64 pa_data;
Yinghai Lua0a0bec2008-07-03 11:37:13 -0700434
Yinghai Lua0a0bec2008-07-03 11:37:13 -0700435 pa_data = boot_params.hdr.setup_data;
436 while (pa_data) {
Jeremy Fitzhardinge88b4c142008-09-07 15:21:16 -0700437 data = early_memremap(pa_data, sizeof(*data));
Tejun Heo24aa0782011-07-12 11:16:06 +0200438 memblock_reserve(pa_data, sizeof(*data) + data->len);
Yinghai Lua0a0bec2008-07-03 11:37:13 -0700439 pa_data = data->next;
Juergen Gross8d4a40b2015-02-24 10:13:28 +0100440 early_memunmap(data, sizeof(*data));
Yinghai Lua0a0bec2008-07-03 11:37:13 -0700441 }
442}
443
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444/*
Yinghai Luccb4def2008-06-25 17:57:13 -0700445 * --------- Crashkernel reservation ------------------------------
446 */
447
Dave Young2965faa2015-09-09 15:38:55 -0700448#ifdef CONFIG_KEXEC_CORE
Bernhard Walle32105f72008-06-26 21:54:08 +0200449
Borislav Petkov606134f2015-10-19 11:17:44 +0200450/* 16M alignment for crash kernel regions */
451#define CRASH_ALIGN (16 << 20)
452
H. Peter Anvin7f8595b2010-12-16 19:20:41 -0800453/*
454 * Keep the crash kernel below this limit. On 32 bits earlier kernels
455 * would limit the kernel to the low 512 MiB due to mapping restrictions.
Yinghai Lu55a20ee2013-04-15 22:23:47 -0700456 * On 64bit, old kexec-tools need to under 896MiB.
H. Peter Anvin7f8595b2010-12-16 19:20:41 -0800457 */
458#ifdef CONFIG_X86_32
Borislav Petkov97eac212015-10-19 11:17:43 +0200459# define CRASH_ADDR_LOW_MAX (512 << 20)
460# define CRASH_ADDR_HIGH_MAX (512 << 20)
H. Peter Anvin7f8595b2010-12-16 19:20:41 -0800461#else
Borislav Petkov97eac212015-10-19 11:17:43 +0200462# define CRASH_ADDR_LOW_MAX (896UL << 20)
463# define CRASH_ADDR_HIGH_MAX MAXMEM
H. Peter Anvin7f8595b2010-12-16 19:20:41 -0800464#endif
465
Baoquan Heeb6db832015-10-19 11:17:41 +0200466static int __init reserve_crashkernel_low(void)
Yinghai Lu0212f912013-01-24 12:20:11 -0800467{
468#ifdef CONFIG_X86_64
Borislav Petkovf56d5572015-10-19 11:17:45 +0200469 unsigned long long base, low_base = 0, low_size = 0;
Yinghai Lu0212f912013-01-24 12:20:11 -0800470 unsigned long total_low_mem;
Yinghai Lu0212f912013-01-24 12:20:11 -0800471 int ret;
472
Borislav Petkov97eac212015-10-19 11:17:43 +0200473 total_low_mem = memblock_mem_size(1UL << (32 - PAGE_SHIFT));
474
Yinghai Luadbc7422013-04-15 22:23:48 -0700475 /* crashkernel=Y,low */
Borislav Petkov97eac212015-10-19 11:17:43 +0200476 ret = parse_crashkernel_low(boot_command_line, total_low_mem, &low_size, &base);
Borislav Petkovf56d5572015-10-19 11:17:45 +0200477 if (ret) {
Yinghai Luc729de82013-04-15 22:23:45 -0700478 /*
479 * two parts from lib/swiotlb.c:
Joerg Roedel94fb9332015-06-10 17:49:42 +0200480 * -swiotlb size: user-specified with swiotlb= or default.
481 *
482 * -swiotlb overflow buffer: now hardcoded to 32k. We round it
483 * to 8M for other buffers that may need to stay low too. Also
484 * make sure we allocate enough extra low memory so that we
485 * don't run out of DMA buffers for 32-bit devices.
Yinghai Luc729de82013-04-15 22:23:45 -0700486 */
Borislav Petkov97eac212015-10-19 11:17:43 +0200487 low_size = max(swiotlb_size_or_default() + (8UL << 20), 256UL << 20);
Yinghai Luc729de82013-04-15 22:23:45 -0700488 } else {
Yinghai Luadbc7422013-04-15 22:23:48 -0700489 /* passed with crashkernel=0,low ? */
Yinghai Luc729de82013-04-15 22:23:45 -0700490 if (!low_size)
Baoquan Heeb6db832015-10-19 11:17:41 +0200491 return 0;
Yinghai Luc729de82013-04-15 22:23:45 -0700492 }
Yinghai Lu0212f912013-01-24 12:20:11 -0800493
Jiri Bohacfe2d48b2017-06-16 18:16:02 +0200494 low_base = memblock_find_in_range(0, 1ULL << 32, low_size, CRASH_ALIGN);
Yinghai Lu0212f912013-01-24 12:20:11 -0800495 if (!low_base) {
Baoquan Heeb6db832015-10-19 11:17:41 +0200496 pr_err("Cannot reserve %ldMB crashkernel low memory, please try smaller size.\n",
497 (unsigned long)(low_size >> 20));
498 return -ENOMEM;
Yinghai Lu0212f912013-01-24 12:20:11 -0800499 }
500
Borislav Petkov6f3760572015-10-19 11:17:46 +0200501 ret = memblock_reserve(low_base, low_size);
502 if (ret) {
503 pr_err("%s: Error reserving crashkernel low memblock.\n", __func__);
504 return ret;
505 }
Borislav Petkov97eac212015-10-19 11:17:43 +0200506
Yinghai Lu0212f912013-01-24 12:20:11 -0800507 pr_info("Reserving %ldMB of low memory at %ldMB for crashkernel (System low RAM: %ldMB)\n",
Borislav Petkov97eac212015-10-19 11:17:43 +0200508 (unsigned long)(low_size >> 20),
509 (unsigned long)(low_base >> 20),
510 (unsigned long)(total_low_mem >> 20));
511
Yinghai Lu0212f912013-01-24 12:20:11 -0800512 crashk_low_res.start = low_base;
513 crashk_low_res.end = low_base + low_size - 1;
514 insert_resource(&iomem_resource, &crashk_low_res);
515#endif
Baoquan Heeb6db832015-10-19 11:17:41 +0200516 return 0;
Yinghai Lu0212f912013-01-24 12:20:11 -0800517}
518
Yinghai Lu29f784e2008-06-25 18:00:22 -0700519static void __init reserve_crashkernel(void)
Yinghai Luccb4def2008-06-25 17:57:13 -0700520{
Borislav Petkovf56d5572015-10-19 11:17:45 +0200521 unsigned long long crash_size, crash_base, total_mem;
Yinghai Lu55a20ee2013-04-15 22:23:47 -0700522 bool high = false;
Yinghai Luccb4def2008-06-25 17:57:13 -0700523 int ret;
524
Dave Young09c71bf2012-03-28 14:42:47 -0700525 total_mem = memblock_phys_mem_size();
Yinghai Luccb4def2008-06-25 17:57:13 -0700526
Yinghai Lu55a20ee2013-04-15 22:23:47 -0700527 /* crashkernel=XM */
Borislav Petkov97eac212015-10-19 11:17:43 +0200528 ret = parse_crashkernel(boot_command_line, total_mem, &crash_size, &crash_base);
Yinghai Lu55a20ee2013-04-15 22:23:47 -0700529 if (ret != 0 || crash_size <= 0) {
Yinghai Luadbc7422013-04-15 22:23:48 -0700530 /* crashkernel=X,high */
Yinghai Lu55a20ee2013-04-15 22:23:47 -0700531 ret = parse_crashkernel_high(boot_command_line, total_mem,
Borislav Petkov97eac212015-10-19 11:17:43 +0200532 &crash_size, &crash_base);
Yinghai Lu55a20ee2013-04-15 22:23:47 -0700533 if (ret != 0 || crash_size <= 0)
534 return;
535 high = true;
536 }
Bernhard Walle32105f72008-06-26 21:54:08 +0200537
Petr Tesarik3db3eb22018-04-25 12:08:35 +0200538 if (xen_pv_domain()) {
539 pr_info("Ignoring crashkernel for a Xen PV domain\n");
540 return;
541 }
542
Bernhard Walle32105f72008-06-26 21:54:08 +0200543 /* 0 means: find the address automatically */
544 if (crash_base <= 0) {
Yinghai Lu9f4c1392010-10-05 16:05:14 -0700545 /*
Xunlei Panga8d4c822017-01-23 14:48:23 +0800546 * Set CRASH_ADDR_LOW_MAX upper bound for crash memory,
547 * as old kexec-tools loads bzImage below that, unless
548 * "crashkernel=size[KMG],high" is specified.
Yinghai Lu9f4c1392010-10-05 16:05:14 -0700549 */
Borislav Petkov606134f2015-10-19 11:17:44 +0200550 crash_base = memblock_find_in_range(CRASH_ALIGN,
Borislav Petkov97eac212015-10-19 11:17:43 +0200551 high ? CRASH_ADDR_HIGH_MAX
552 : CRASH_ADDR_LOW_MAX,
Borislav Petkov606134f2015-10-19 11:17:44 +0200553 crash_size, CRASH_ALIGN);
Tejun Heo1f5026a2011-07-12 09:58:09 +0200554 if (!crash_base) {
Yinghai Lu44280732009-11-22 17:18:49 -0800555 pr_info("crashkernel reservation failed - No suitable area found.\n");
Yinghai Luccb4def2008-06-25 17:57:13 -0700556 return;
557 }
Yinghai Lu0212f912013-01-24 12:20:11 -0800558
Bernhard Walle32105f72008-06-26 21:54:08 +0200559 } else {
Yinghai Lu44280732009-11-22 17:18:49 -0800560 unsigned long long start;
561
Yinghai Lu9f4c1392010-10-05 16:05:14 -0700562 start = memblock_find_in_range(crash_base,
Borislav Petkov97eac212015-10-19 11:17:43 +0200563 crash_base + crash_size,
564 crash_size, 1 << 20);
Yinghai Lu44280732009-11-22 17:18:49 -0800565 if (start != crash_base) {
566 pr_info("crashkernel reservation failed - memory is in use.\n");
Yinghai Luccb4def2008-06-25 17:57:13 -0700567 return;
568 }
Yinghai Luccb4def2008-06-25 17:57:13 -0700569 }
Borislav Petkov6f3760572015-10-19 11:17:46 +0200570 ret = memblock_reserve(crash_base, crash_size);
571 if (ret) {
572 pr_err("%s: Error reserving crashkernel memblock.\n", __func__);
573 return;
574 }
Bernhard Walle32105f72008-06-26 21:54:08 +0200575
Baoquan Heeb6db832015-10-19 11:17:41 +0200576 if (crash_base >= (1ULL << 32) && reserve_crashkernel_low()) {
577 memblock_free(crash_base, crash_size);
578 return;
579 }
580
Borislav Petkovf56d5572015-10-19 11:17:45 +0200581 pr_info("Reserving %ldMB of memory at %ldMB for crashkernel (System RAM: %ldMB)\n",
582 (unsigned long)(crash_size >> 20),
583 (unsigned long)(crash_base >> 20),
584 (unsigned long)(total_mem >> 20));
Bernhard Walle32105f72008-06-26 21:54:08 +0200585
586 crashk_res.start = crash_base;
587 crashk_res.end = crash_base + crash_size - 1;
588 insert_resource(&iomem_resource, &crashk_res);
Yinghai Luccb4def2008-06-25 17:57:13 -0700589}
590#else
Yinghai Lu29f784e2008-06-25 18:00:22 -0700591static void __init reserve_crashkernel(void)
Yinghai Luccb4def2008-06-25 17:57:13 -0700592{
593}
594#endif
595
Yinghai Lubdba0e72008-06-25 17:58:02 -0700596static struct resource standard_io_resources[] = {
597 { .name = "dma1", .start = 0x00, .end = 0x1f,
598 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
599 { .name = "pic1", .start = 0x20, .end = 0x21,
600 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
601 { .name = "timer0", .start = 0x40, .end = 0x43,
602 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
603 { .name = "timer1", .start = 0x50, .end = 0x53,
604 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
605 { .name = "keyboard", .start = 0x60, .end = 0x60,
606 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
607 { .name = "keyboard", .start = 0x64, .end = 0x64,
608 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
609 { .name = "dma page reg", .start = 0x80, .end = 0x8f,
610 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
611 { .name = "pic2", .start = 0xa0, .end = 0xa1,
612 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
613 { .name = "dma2", .start = 0xc0, .end = 0xdf,
614 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
615 { .name = "fpu", .start = 0xf0, .end = 0xff,
616 .flags = IORESOURCE_BUSY | IORESOURCE_IO }
617};
618
Thomas Gleixner8fee6972009-08-19 14:55:50 +0200619void __init reserve_standard_io_resources(void)
Yinghai Lubdba0e72008-06-25 17:58:02 -0700620{
621 int i;
622
623 /* request I/O space for devices used on all i[345]86 PCs */
624 for (i = 0; i < ARRAY_SIZE(standard_io_resources); i++)
625 request_resource(&ioport_resource, &standard_io_resources[i]);
626
627}
628
Yinghai Lu042be382010-04-01 14:32:43 -0700629static __init void reserve_ibft_region(void)
630{
631 unsigned long addr, size = 0;
632
633 addr = find_ibft_region(&size);
634
635 if (size)
Tejun Heo24aa0782011-07-12 11:16:06 +0200636 memblock_reserve(addr, size);
Yinghai Lu042be382010-04-01 14:32:43 -0700637}
638
Jesse Barnesa9acc532012-11-14 20:43:31 +0000639static bool __init snb_gfx_workaround_needed(void)
640{
H. Peter Anvine43b3ce2013-01-13 20:56:41 -0800641#ifdef CONFIG_PCI
Jesse Barnesa9acc532012-11-14 20:43:31 +0000642 int i;
643 u16 vendor, devid;
H. Peter Anvinab3cd862013-01-13 20:36:39 -0800644 static const __initconst u16 snb_ids[] = {
Jesse Barnesa9acc532012-11-14 20:43:31 +0000645 0x0102,
646 0x0112,
647 0x0122,
648 0x0106,
649 0x0116,
650 0x0126,
651 0x010a,
652 };
653
654 /* Assume no if something weird is going on with PCI */
655 if (!early_pci_allowed())
656 return false;
657
658 vendor = read_pci_config_16(0, 2, 0, PCI_VENDOR_ID);
659 if (vendor != 0x8086)
660 return false;
661
662 devid = read_pci_config_16(0, 2, 0, PCI_DEVICE_ID);
663 for (i = 0; i < ARRAY_SIZE(snb_ids); i++)
664 if (devid == snb_ids[i])
665 return true;
H. Peter Anvine43b3ce2013-01-13 20:56:41 -0800666#endif
Jesse Barnesa9acc532012-11-14 20:43:31 +0000667
668 return false;
669}
670
671/*
672 * Sandy Bridge graphics has trouble with certain ranges, exclude
673 * them from allocation.
674 */
675static void __init trim_snb_memory(void)
676{
H. Peter Anvinab3cd862013-01-13 20:36:39 -0800677 static const __initconst unsigned long bad_pages[] = {
Jesse Barnesa9acc532012-11-14 20:43:31 +0000678 0x20050000,
679 0x20110000,
680 0x20130000,
681 0x20138000,
682 0x40004000,
683 };
684 int i;
685
686 if (!snb_gfx_workaround_needed())
687 return;
688
689 printk(KERN_DEBUG "reserving inaccessible SNB gfx pages\n");
690
691 /*
692 * Reserve all memory below the 1 MB mark that has not
693 * already been reserved.
694 */
695 memblock_reserve(0, 1<<20);
696
697 for (i = 0; i < ARRAY_SIZE(bad_pages); i++) {
698 if (memblock_reserve(bad_pages[i], PAGE_SIZE))
699 printk(KERN_WARNING "failed to reserve 0x%08lx\n",
700 bad_pages[i]);
701 }
702}
703
704/*
705 * Here we put platform-specific memory range workarounds, i.e.
706 * memory known to be corrupt or otherwise in need to be reserved on
707 * specific platforms.
708 *
709 * If this gets used more widely it could use a real dispatch mechanism.
710 */
711static void __init trim_platform_memory_ranges(void)
712{
713 trim_snb_memory();
714}
715
Yinghai Lu1b5576e2010-01-22 11:21:04 +0800716static void __init trim_bios_range(void)
717{
718 /*
719 * A special case is the first 4Kb of memory;
720 * This is a BIOS owned area, not kernel ram, but generally
721 * not listed as such in the E820 table.
H. Peter Anvind0cd7422010-08-24 17:32:04 -0700722 *
723 * This typically reserves additional memory (64KiB by default)
724 * since some BIOSes are known to corrupt low memory. See the
H. Peter Anvin9ea77bd2010-08-25 16:38:20 -0700725 * Kconfig help text for X86_RESERVE_LOW.
Yinghai Lu1b5576e2010-01-22 11:21:04 +0800726 */
Ingo Molnar09821ff2017-01-28 17:09:33 +0100727 e820__range_update(0, PAGE_SIZE, E820_TYPE_RAM, E820_TYPE_RESERVED);
H. Peter Anvind0cd7422010-08-24 17:32:04 -0700728
Yinghai Lu1b5576e2010-01-22 11:21:04 +0800729 /*
730 * special case: Some BIOSen report the PC BIOS
731 * area (640->1Mb) as ram even though it is not.
732 * take them out.
733 */
Ingo Molnar09821ff2017-01-28 17:09:33 +0100734 e820__range_remove(BIOS_BEGIN, BIOS_END - BIOS_BEGIN, E820_TYPE_RAM, 1);
Jesse Barnesa9acc532012-11-14 20:43:31 +0000735
Ingo Molnarf9748fa2017-01-28 18:00:35 +0100736 e820__update_table(e820_table);
Yinghai Lu1b5576e2010-01-22 11:21:04 +0800737}
738
Yinghai Lub422a302013-01-24 12:19:45 -0800739/* called before trim_bios_range() to spare extra sanitize */
740static void __init e820_add_kernel_range(void)
741{
742 u64 start = __pa_symbol(_text);
743 u64 size = __pa_symbol(_end) - start;
744
745 /*
Ingo Molnar09821ff2017-01-28 17:09:33 +0100746 * Complain if .text .data and .bss are not marked as E820_TYPE_RAM and
Yinghai Lub422a302013-01-24 12:19:45 -0800747 * attempt to fix it by adding the range. We may have a confused BIOS,
748 * or the user may have used memmap=exactmap or memmap=xxM$yyM to
749 * exclude kernel range. If we really are running on top non-RAM,
750 * we will crash later anyways.
751 */
Ingo Molnar09821ff2017-01-28 17:09:33 +0100752 if (e820__mapped_all(start, start + size, E820_TYPE_RAM))
Yinghai Lub422a302013-01-24 12:19:45 -0800753 return;
754
Ingo Molnar09821ff2017-01-28 17:09:33 +0100755 pr_warn(".text .data .bss are not marked as E820_TYPE_RAM!\n");
756 e820__range_remove(start, size, E820_TYPE_RAM, 0);
757 e820__range_add(start, size, E820_TYPE_RAM);
Yinghai Lub422a302013-01-24 12:19:45 -0800758}
759
H. Peter Anvin95c96082013-02-14 14:02:52 -0800760static unsigned reserve_low = CONFIG_X86_RESERVE_LOW << 10;
761
H. Peter Anvin9ea77bd2010-08-25 16:38:20 -0700762static int __init parse_reservelow(char *p)
763{
764 unsigned long long size;
765
766 if (!p)
767 return -EINVAL;
768
769 size = memparse(p, &p);
770
771 if (size < 4096)
772 size = 4096;
773
774 if (size > 640*1024)
775 size = 640*1024;
776
777 reserve_low = size;
778
779 return 0;
780}
781
782early_param("reservelow", parse_reservelow);
783
H. Peter Anvin95c96082013-02-14 14:02:52 -0800784static void __init trim_low_memory_range(void)
785{
786 memblock_reserve(0, ALIGN(reserve_low, PAGE_SIZE));
787}
788
Jeremy Fitzhardinge5394f802008-09-07 01:51:32 -0700789/*
Kees Cookf32360e2013-10-10 17:18:17 -0700790 * Dump out kernel offset information on panic.
791 */
792static int
793dump_kernel_offset(struct notifier_block *self, unsigned long v, void *p)
794{
Borislav Petkov78cac482015-04-01 12:49:52 +0200795 if (kaslr_enabled()) {
796 pr_emerg("Kernel Offset: 0x%lx from 0x%lx (relocation range: 0x%lx-0x%lx)\n",
Jiri Kosina4545c892015-04-27 13:17:19 +0200797 kaslr_offset(),
Borislav Petkov78cac482015-04-01 12:49:52 +0200798 __START_KERNEL,
799 __START_KERNEL_map,
800 MODULES_VADDR-1);
801 } else {
802 pr_emerg("Kernel Offset: disabled\n");
803 }
Kees Cookf32360e2013-10-10 17:18:17 -0700804
805 return 0;
806}
807
808/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700809 * Determine if we were loaded by an EFI loader. If so, then we have also been
810 * passed the efi memmap, systab, etc., so we should use these data structures
811 * for initialization. Note, the efi init code path is determined by the
812 * global efi_enabled. This allows the same kernel image to be used on existing
813 * systems (with a traditional BIOS) as well as on EFI systems.
814 */
Yinghai Lu76934ed2008-06-25 17:52:35 -0700815/*
816 * setup_arch - architecture-specific boot-time initializations
817 *
818 * Note: On x86_64, fixmaps are ready for use even before this is called.
819 */
820
Linus Torvalds1da177e2005-04-16 15:20:36 -0700821void __init setup_arch(char **cmdline_p)
822{
Yinghai Lu6c902b62013-01-24 12:20:12 -0800823 memblock_reserve(__pa_symbol(_text),
824 (unsigned long)__bss_stop - (unsigned long)_text);
825
Yinghai Lu1b8c78b2013-01-24 12:19:55 -0800826 early_reserve_initrd();
827
Yinghai Lu6c902b62013-01-24 12:20:12 -0800828 /*
829 * At this point everything still needed from the boot loader
830 * or BIOS or kernel text should be early reserved or marked not
831 * RAM in e820. All other memory is free game.
832 */
833
Yinghai Lu76934ed2008-06-25 17:52:35 -0700834#ifdef CONFIG_X86_32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700835 memcpy(&boot_cpu_data, &new_cpu_data, sizeof(new_cpu_data));
Borislav Petkovb40827fa2010-08-28 15:58:33 +0200836
837 /*
838 * copy kernel address range established so far and switch
839 * to the proper swapper page table
840 */
841 clone_pgd_range(swapper_pg_dir + KERNEL_PGD_BOUNDARY,
842 initial_page_table + KERNEL_PGD_BOUNDARY,
843 KERNEL_PGD_PTRS);
844
845 load_cr3(swapper_pg_dir);
Bryan O'Donoghue20752442014-10-07 01:19:48 +0100846 /*
847 * Note: Quark X1000 CPUs advertise PGE incorrectly and require
848 * a cr3 based tlb flush, so the following __flush_tlb_all()
849 * will not flush anything because the cpu quirk which clears
850 * X86_FEATURE_PGE has not been invoked yet. Though due to the
851 * load_cr3() above the TLB has been flushed already. The
852 * quirk is invoked before subsequent calls to __flush_tlb_all()
853 * so proper operation is guaranteed.
854 */
Borislav Petkovb40827fa2010-08-28 15:58:33 +0200855 __flush_tlb_all();
Yinghai Lu76934ed2008-06-25 17:52:35 -0700856#else
857 printk(KERN_INFO "Command line: %s\n", boot_command_line);
Kirill A. Shutemov162434e2018-02-14 14:16:54 +0300858 boot_cpu_data.x86_phys_bits = MAX_PHYSMEM_BITS;
Yinghai Lu76934ed2008-06-25 17:52:35 -0700859#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700860
Alok Kataria9863c902010-08-23 14:49:11 -0700861 /*
862 * If we have OLPC OFW, we might end up relocating the fixmap due to
863 * reserve_top(), so do this before touching the ioremap area.
864 */
Andres Salomonfd699c72010-06-18 17:46:53 -0400865 olpc_ofw_detect();
866
Thomas Gleixner433f8922017-08-28 08:47:50 +0200867 idt_setup_early_traps();
Jeremy Fitzhardinge9e882c92008-07-21 16:49:54 -0700868 early_cpu_init();
Jeremy Fitzhardinge1a98fd12008-06-29 20:02:44 -0700869 early_ioremap_init();
870
Andres Salomonfd699c72010-06-18 17:46:53 -0400871 setup_olpc_ofw_pgd();
872
H. Peter Anvin30c82642007-10-15 17:13:22 -0700873 ROOT_DEV = old_decode_dev(boot_params.hdr.root_dev);
874 screen_info = boot_params.screen_info;
875 edid_info = boot_params.edid_info;
Yinghai Lu76934ed2008-06-25 17:52:35 -0700876#ifdef CONFIG_X86_32
H. Peter Anvin30c82642007-10-15 17:13:22 -0700877 apm_info.bios = boot_params.apm_bios_info;
878 ist_info = boot_params.ist_info;
Yinghai Lu76934ed2008-06-25 17:52:35 -0700879#endif
880 saved_video_mode = boot_params.hdr.vid_mode;
H. Peter Anvin30c82642007-10-15 17:13:22 -0700881 bootloader_type = boot_params.hdr.type_of_loader;
H. Peter Anvin50312962009-05-07 16:54:11 -0700882 if ((bootloader_type >> 4) == 0xe) {
883 bootloader_type &= 0xf;
884 bootloader_type |= (boot_params.hdr.ext_loader_type+0x10) << 4;
885 }
886 bootloader_version = bootloader_type & 0xf;
887 bootloader_version |= boot_params.hdr.ext_loader_ver << 4;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700888
889#ifdef CONFIG_BLK_DEV_RAM
H. Peter Anvin30c82642007-10-15 17:13:22 -0700890 rd_image_start = boot_params.hdr.ram_size & RAMDISK_IMAGE_START_MASK;
891 rd_prompt = ((boot_params.hdr.ram_size & RAMDISK_PROMPT_FLAG) != 0);
892 rd_doload = ((boot_params.hdr.ram_size & RAMDISK_LOAD_FLAG) != 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700893#endif
Yinghai Lu74652522008-06-23 19:53:33 -0700894#ifdef CONFIG_EFI
895 if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature,
Daniel Kiper94029732014-06-30 19:53:03 +0200896 EFI32_LOADER_SIGNATURE, 4)) {
Matt Fleming3e909592014-01-15 13:21:22 +0000897 set_bit(EFI_BOOT, &efi.flags);
Olof Johansson1adbfa32012-02-12 13:24:29 -0800898 } else if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature,
Daniel Kiper94029732014-06-30 19:53:03 +0200899 EFI64_LOADER_SIGNATURE, 4)) {
Matt Fleming3e909592014-01-15 13:21:22 +0000900 set_bit(EFI_BOOT, &efi.flags);
901 set_bit(EFI_64BIT, &efi.flags);
Yinghai Lu74652522008-06-23 19:53:33 -0700902 }
903#endif
904
Thomas Gleixner42bbdb42009-08-20 13:04:10 +0200905 x86_init.oem.arch_setup();
Huang, Ying2215e692008-01-30 13:31:19 +0100906
Bjorn Helgaas419afdf2010-10-26 15:41:49 -0600907 iomem_resource.end = (1ULL << boot_cpu_data.x86_phys_bits) - 1;
Ingo Molnar103e2062017-01-28 09:58:49 +0100908 e820__memory_setup();
Yinghai Lu28bb2232008-06-30 16:20:54 -0700909 parse_setup_data();
910
Linus Torvalds1da177e2005-04-16 15:20:36 -0700911 copy_edd();
912
H. Peter Anvin30c82642007-10-15 17:13:22 -0700913 if (!boot_params.hdr.root_flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700914 root_mountflags &= ~MS_RDONLY;
915 init_mm.start_code = (unsigned long) _text;
916 init_mm.end_code = (unsigned long) _etext;
917 init_mm.end_data = (unsigned long) _edata;
Jeremy Fitzhardinge93dbda72009-02-26 17:35:44 -0800918 init_mm.brk = _brk_end;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700919
Dave Hansenfe3d1972014-11-14 07:18:29 -0800920 mpx_mm_init(&init_mm);
921
Linus Torvalds4046d6e2016-04-14 11:18:57 -0700922 code_resource.start = __pa_symbol(_text);
923 code_resource.end = __pa_symbol(_etext)-1;
924 data_resource.start = __pa_symbol(_etext);
925 data_resource.end = __pa_symbol(_edata)-1;
926 bss_resource.start = __pa_symbol(__bss_start);
927 bss_resource.end = __pa_symbol(__bss_stop)-1;
928
Tim Bird516cbf32008-08-12 12:52:36 -0700929#ifdef CONFIG_CMDLINE_BOOL
930#ifdef CONFIG_CMDLINE_OVERRIDE
931 strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE);
932#else
933 if (builtin_cmdline[0]) {
934 /* append boot loader cmdline to builtin */
935 strlcat(builtin_cmdline, " ", COMMAND_LINE_SIZE);
936 strlcat(builtin_cmdline, boot_command_line, COMMAND_LINE_SIZE);
937 strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE);
938 }
939#endif
940#endif
941
Yinghai Lueda6da92009-09-19 11:07:57 -0700942 strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE);
943 *cmdline_p = command_line;
944
Yinghai Lueda6da92009-09-19 11:07:57 -0700945 /*
Kees Cook4b0f3b82009-11-13 15:28:17 -0800946 * x86_configure_nx() is called before parse_early_param() to detect
947 * whether hardware doesn't support NX (so that the early EHCI debug
948 * console setup can safely call set_fixmap()). It may then be called
949 * again from within noexec_setup() during parsing early parameters
950 * to honor the respective command line option.
Yinghai Lueda6da92009-09-19 11:07:57 -0700951 */
H. Peter Anvin4763ed42009-11-13 15:28:16 -0800952 x86_configure_nx();
Yinghai Lueda6da92009-09-19 11:07:57 -0700953
954 parse_early_param();
955
Dave Young835bcec2018-01-02 17:21:09 +0000956 if (efi_enabled(EFI_BOOT))
957 efi_memblock_x86_reserve_range();
Reza Arbab39fa104d2016-12-12 16:42:55 -0800958#ifdef CONFIG_MEMORY_HOTPLUG
959 /*
960 * Memory used by the kernel cannot be hot-removed because Linux
961 * cannot migrate the kernel pages. When memory hotplug is
962 * enabled, we should prevent memblock from allocating memory
963 * for the kernel.
964 *
965 * ACPI SRAT records all hotpluggable memory ranges. But before
966 * SRAT is parsed, we don't know about it.
967 *
968 * The kernel image is loaded into memory at very early time. We
969 * cannot prevent this anyway. So on NUMA system, we set any
970 * node the kernel resides in as un-hotpluggable.
971 *
972 * Since on modern servers, one node could have double-digit
973 * gigabytes memory, we can assume the memory around the kernel
974 * image is also un-hotpluggable. So before SRAT is parsed, just
975 * allocate memory near the kernel image to try the best to keep
976 * the kernel away from hotpluggable memory.
977 */
978 if (movable_node_is_enabled())
979 memblock_set_bottom_up(true);
980#endif
981
Kees Cook4b0f3b82009-11-13 15:28:17 -0800982 x86_report_nx();
Jeremy Fitzhardinge0ad5bce2008-09-11 16:42:00 -0700983
Yinghai Lu28bb2232008-06-30 16:20:54 -0700984 /* after early param, so could get panic from serial */
Yinghai Lua9ce6bc2010-08-25 13:39:17 -0700985 memblock_x86_reserve_range_setup_data();
Yinghai Lu28bb2232008-06-30 16:20:54 -0700986
Yinghai Lu76934ed2008-06-25 17:52:35 -0700987 if (acpi_mps_check()) {
Ingo Molnar3eb11ed2008-06-23 22:19:22 +0200988#ifdef CONFIG_X86_LOCAL_APIC
Yinghai Lu76934ed2008-06-25 17:52:35 -0700989 disable_apic = 1;
990#endif
Yinghai Lu988781d2008-07-21 11:21:43 -0700991 setup_clear_cpu_cap(X86_FEATURE_APIC);
Yinghai Lu3c999f12008-06-20 16:11:20 -0700992 }
993
Linus Torvaldsdc7c65d2008-07-16 17:25:46 -0700994#ifdef CONFIG_PCI
995 if (pci_early_dump_regs)
996 early_dump_pci_devices();
Glauber de Oliveira Costa4fe29a82008-03-19 14:25:23 -0300997#endif
Linus Torvaldsdc7c65d2008-07-16 17:25:46 -0700998
Ingo Molnar1a127032017-01-28 22:27:28 +0100999 e820__reserve_setup_data();
Ingo Molnar9641bda2017-01-28 13:37:17 +01001000 e820__finish_early_params();
Rusty Russell1a3f2392006-09-26 10:52:32 +02001001
Matt Fleming83e68182012-11-14 09:42:35 +00001002 if (efi_enabled(EFI_BOOT))
Brian Malyff0c0872009-03-03 21:55:31 -05001003 efi_init();
1004
Yinghai Lu2216d192008-09-22 02:52:26 -07001005 dmi_scan_machine();
Chen, Gongdd6dad42013-10-18 14:29:25 -07001006 dmi_memdev_walk();
Tejun Heo98e5e1b2013-04-30 15:27:15 -07001007 dmi_set_dump_stack_arch_desc();
Yinghai Lu2216d192008-09-22 02:52:26 -07001008
Alok Kataria88b094f2008-10-27 10:41:46 -07001009 /*
1010 * VMware detection requires dmi to be available, so this
Jean Delvarea1652bb2017-10-03 11:47:27 +02001011 * needs to be done after dmi_scan_machine(), for the boot CPU.
Alok Kataria88b094f2008-10-27 10:41:46 -07001012 */
Thomas Gleixner2d826402009-08-20 17:06:25 +02001013 init_hypervisor_platform();
Alok Kataria88b094f2008-10-27 10:41:46 -07001014
Thomas Gleixnerf7cf5a52009-08-19 14:43:56 +02001015 x86_init.resources.probe_roms();
Yinghai Lu41c094f2008-06-16 13:03:31 -07001016
Linus Torvalds4046d6e2016-04-14 11:18:57 -07001017 /* after parse_early_param, so could debug it */
1018 insert_resource(&iomem_resource, &code_resource);
1019 insert_resource(&iomem_resource, &data_resource);
1020 insert_resource(&iomem_resource, &bss_resource);
1021
Yinghai Lub422a302013-01-24 12:19:45 -08001022 e820_add_kernel_range();
Yinghai Lu1b5576e2010-01-22 11:21:04 +08001023 trim_bios_range();
Yinghai Lu76934ed2008-06-25 17:52:35 -07001024#ifdef CONFIG_X86_32
Yinghai Lucc9f7a02008-06-16 16:11:08 -07001025 if (ppro_with_ram_bug()) {
Ingo Molnar09821ff2017-01-28 17:09:33 +01001026 e820__range_update(0x70000000ULL, 0x40000ULL, E820_TYPE_RAM,
1027 E820_TYPE_RESERVED);
Ingo Molnarf9748fa2017-01-28 18:00:35 +01001028 e820__update_table(e820_table);
Yinghai Lucc9f7a02008-06-16 16:11:08 -07001029 printk(KERN_INFO "fixed physical RAM map:\n");
Ingo Molnarbe0c3f02017-01-28 14:24:02 +01001030 e820__print_table("bad_ppro");
Yinghai Lucc9f7a02008-06-16 16:11:08 -07001031 }
Yinghai Lu76934ed2008-06-25 17:52:35 -07001032#else
1033 early_gart_iommu_check();
1034#endif
Yinghai Lucc9f7a02008-06-16 16:11:08 -07001035
Yinghai Lu7b2a0a62008-06-03 19:35:04 -07001036 /*
1037 * partially used pages are not usable - thus
1038 * we are rounding upwards:
1039 */
Ingo Molnar0c6fc112017-01-28 22:52:16 +01001040 max_pfn = e820__end_of_ram_pfn();
Yinghai Lu7b2a0a62008-06-03 19:35:04 -07001041
Yinghai Lu093af8d2008-01-30 13:33:32 +01001042 /* update e820 for memory not covered by WB MTRRs */
1043 mtrr_bp_init();
Yinghai Lu2dc807b2008-07-08 18:56:38 -07001044 if (mtrr_trim_uncached_memory(max_pfn))
Ingo Molnar0c6fc112017-01-28 22:52:16 +01001045 max_pfn = e820__end_of_ram_pfn();
Yinghai Lu76c324182008-03-23 00:16:49 -07001046
Igor Mammedov8dd33032015-12-04 14:07:05 +01001047 max_possible_pfn = max_pfn;
1048
Thomas Garnierc7d23612016-08-09 10:11:04 -07001049 /*
Mikulas Patocka99c13b82017-07-04 19:04:23 -04001050 * This call is required when the CPU does not support PAT. If
1051 * mtrr_bp_init() invoked it already via pat_init() the call has no
1052 * effect.
1053 */
1054 init_cache_modes();
1055
1056 /*
Thomas Garnierc7d23612016-08-09 10:11:04 -07001057 * Define random base addresses for memory sections after max_pfn is
1058 * defined and before each memory section base is used.
1059 */
1060 kernel_randomize_memory();
1061
Yinghai Lu76934ed2008-06-25 17:52:35 -07001062#ifdef CONFIG_X86_32
Yinghai Lu4e296842008-06-24 12:18:14 -07001063 /* max_low_pfn get updated here */
Yinghai Lu2ec65f82008-06-23 03:05:30 -07001064 find_low_pfn_range();
Yinghai Lu76934ed2008-06-25 17:52:35 -07001065#else
Yinghai Lu06cd9a72009-02-16 17:29:58 -08001066 check_x2apic();
Yinghai Lu76934ed2008-06-25 17:52:35 -07001067
1068 /* How many end-of-memory variables you have, grandma! */
1069 /* need this before calling reserve_initrd */
Yinghai Luf361a452008-07-10 20:38:26 -07001070 if (max_pfn > (1UL<<(32 - PAGE_SHIFT)))
Ingo Molnar0c6fc112017-01-28 22:52:16 +01001071 max_low_pfn = e820__end_of_low_ram_pfn();
Yinghai Luf361a452008-07-10 20:38:26 -07001072 else
1073 max_low_pfn = max_pfn;
1074
Yinghai Lu76934ed2008-06-25 17:52:35 -07001075 high_memory = (void *)__va(max_pfn * PAGE_SIZE - 1) + 1;
1076#endif
Yinghai Lu2ec65f82008-06-23 03:05:30 -07001077
Yinghai Lu893f38d2009-12-10 13:07:22 -08001078 /*
1079 * Find and reserve possible boot-time SMP configuration:
1080 */
1081 find_smp_config();
1082
Yinghai Lu042be382010-04-01 14:32:43 -07001083 reserve_ibft_region();
1084
Yinghai Lu8d574702012-11-16 19:38:58 -08001085 early_alloc_pgt_buf();
1086
Yinghai Lu72d7c3b2010-08-25 13:39:17 -07001087 /*
Ingo Molnar4918e222017-01-28 11:37:42 +01001088 * Need to conclude brk, before e820__memblock_setup()
Yinghai Lu72d7c3b2010-08-25 13:39:17 -07001089 * it could use memblock_find_in_range, could overlap with
1090 * brk area.
1091 */
1092 reserve_brk();
1093
Yinghai Lue5f15b42011-02-18 11:30:30 +00001094 cleanup_highmap();
1095
Tang Chen2449f342013-08-14 11:44:04 +08001096 memblock_set_current_limit(ISA_END_ADDRESS);
Ingo Molnar4918e222017-01-28 11:37:42 +01001097 e820__memblock_setup();
Yinghai Lu72d7c3b2010-08-25 13:39:17 -07001098
Andy Lutomirski007b7562016-08-10 02:29:13 -07001099 reserve_bios_regions();
1100
Matt Fleming49715312016-06-21 23:11:38 +01001101 if (efi_enabled(EFI_MEMMAP)) {
1102 efi_fake_memmap();
1103 efi_find_mirror();
Ricardo Neri3dad6f72016-08-16 17:32:31 -07001104 efi_esrt_init();
Matt Fleming49715312016-06-21 23:11:38 +01001105
1106 /*
1107 * The EFI specification says that boot service code won't be
1108 * called after ExitBootServices(). This is, in fact, a lie.
1109 */
Matthew Garrett916f6762011-05-25 09:53:13 -04001110 efi_reserve_boot_services();
Matt Fleming49715312016-06-21 23:11:38 +01001111 }
Matthew Garrett916f6762011-05-25 09:53:13 -04001112
Yinghai Lu72d7c3b2010-08-25 13:39:17 -07001113 /* preallocate 4k for mptable mpc */
Ingo Molnar5da217c2017-01-28 13:46:28 +01001114 e820__memblock_alloc_reserved_mpc_new();
Yinghai Lu72d7c3b2010-08-25 13:39:17 -07001115
1116#ifdef CONFIG_X86_CHECK_BIOS_CORRUPTION
1117 setup_bios_corruption_check();
1118#endif
1119
Yinghai Lu10054232013-01-24 12:19:54 -08001120#ifdef CONFIG_X86_32
Bjorn Helgaas365811d2012-05-29 15:06:29 -07001121 printk(KERN_DEBUG "initial memory mapped: [mem 0x00000000-%#010lx]\n",
1122 (max_pfn_mapped<<PAGE_SHIFT) - 1);
Yinghai Lu10054232013-01-24 12:19:54 -08001123#endif
Yinghai Lu72d7c3b2010-08-25 13:39:17 -07001124
Yinghai Lu4f7b92262013-01-24 12:19:51 -08001125 reserve_real_mode();
Yinghai Lu893f38d2009-12-10 13:07:22 -08001126
Jesse Barnesa9acc532012-11-14 20:43:31 +00001127 trim_platform_memory_ranges();
H. Peter Anvin95c96082013-02-14 14:02:52 -08001128 trim_low_memory_range();
Jesse Barnesa9acc532012-11-14 20:43:31 +00001129
Yinghai Lu22ddfca2012-11-16 19:38:41 -08001130 init_mem_mapping();
Pekka J Enberg854c8792009-06-22 17:39:41 +03001131
Thomas Gleixner433f8922017-08-28 08:47:50 +02001132 idt_setup_early_pf();
Jarkko Sakkinencda846f2012-05-08 21:22:46 +03001133
Andy Lutomirski18bc7bd2016-08-10 02:29:14 -07001134 /*
1135 * Update mmu_cr4_features (and, indirectly, trampoline_cr4_features)
1136 * with the current CR4 value. This may not be necessary, but
1137 * auditing all the early-boot CR4 manipulation would be needed to
1138 * rule it out.
Andy Lutomirskic7ad5ad2017-09-10 17:48:27 -07001139 *
1140 * Mask off features that don't work outside long mode (just
1141 * PCIDE for now).
Andy Lutomirski18bc7bd2016-08-10 02:29:14 -07001142 */
Andy Lutomirskic7ad5ad2017-09-10 17:48:27 -07001143 mmu_cr4_features = __read_cr4() & ~X86_CR4_PCIDE;
Andy Lutomirski18bc7bd2016-08-10 02:29:14 -07001144
Yinghai Lu4ce7a862014-01-27 17:06:50 -08001145 memblock_set_current_limit(get_max_mapped());
Yinghai Lue7b37892008-06-25 21:51:28 -07001146
1147 /*
1148 * NOTE: On x86-32, only from this point on, fixmaps are ready for use.
1149 */
1150
1151#ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT
1152 if (init_ohci1394_dma_early)
Mike Travis162a7e72011-05-24 17:13:20 -07001153 init_ohci1394_dma_on_all_controllers();
1154#endif
Yinghai Lue7b37892008-06-25 21:51:28 -07001155 /* Allocate bigger log buffer */
Yinghai Lu2ec65f82008-06-23 03:05:30 -07001156 setup_log_buf(1);
1157
David Howells9661b332017-02-06 11:22:45 +00001158 if (efi_enabled(EFI_BOOT)) {
1159 switch (boot_params.secure_boot) {
1160 case efi_secureboot_mode_disabled:
1161 pr_info("Secure boot disabled\n");
1162 break;
1163 case efi_secureboot_mode_enabled:
1164 pr_info("Secure boot enabled\n");
1165 break;
1166 default:
1167 pr_info("Secure boot could not be determined\n");
1168 break;
1169 }
1170 }
1171
Yinghai Lu44280732009-11-22 17:18:49 -08001172 reserve_initrd();
1173
Aleksey Makarovda3d3f92016-06-20 13:56:10 +03001174 acpi_table_upgrade();
Yinghai Lu1c6e5502008-06-17 15:41:45 -07001175
Yinghai Lu1c6e5502008-06-17 15:41:45 -07001176 vsmp_init();
1177
Yinghai Lu1c6e5502008-06-17 15:41:45 -07001178 io_delay_init();
1179
Lukas Wunner630b3af2017-08-01 14:10:41 +02001180 early_platform_quirks();
1181
Yinghai Lu1c6e5502008-06-17 15:41:45 -07001182 /*
1183 * Parse the ACPI tables for possible boot-time SMP configuration.
Yinghai Lu1c6e5502008-06-17 15:41:45 -07001184 */
Yinghai Lu20e69262013-03-01 14:51:27 -08001185 acpi_boot_table_init();
1186
1187 early_acpi_boot_init();
1188
Bernhard Walle91467bd2008-07-18 19:07:53 +02001189 initmem_init();
Weijie Yang3c325f82014-10-24 17:00:34 +08001190 dma_contiguous_reserve(max_pfn_mapped << PAGE_SHIFT);
Tang Chenfa591c42013-11-12 15:08:07 -08001191
1192 /*
1193 * Reserve memory for crash kernel after SRAT is parsed so that it
1194 * won't consume hotpluggable memory.
1195 */
1196 reserve_crashkernel();
1197
Glauber de Oliveira Costa790c73f2008-02-15 17:52:48 -02001198 memblock_find_dma_reserve();
1199
1200#ifdef CONFIG_KVM_GUEST
1201 kvmclock_init();
Thomas Gleixner030cb6c2009-08-20 14:30:02 +02001202#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001203
Boris Ostrovskyccb64942017-09-11 14:51:11 -04001204 tsc_early_delay_calibrate();
1205 if (!early_xdbc_setup_hardware())
1206 early_xdbc_register_console();
1207
Thomas Gleixner030cb6c2009-08-20 14:30:02 +02001208 x86_init.paging.pagetable_init();
Bernhard Kaindlf212ec42008-01-30 13:34:11 +01001209
Andrey Ryabininef7f0d62015-02-13 14:39:25 -08001210 kasan_init();
1211
Andy Lutomirskid2b6dc62017-05-08 17:09:10 -07001212 /*
Thomas Gleixner945fd172018-02-28 21:14:26 +01001213 * Sync back kernel address range.
1214 *
1215 * FIXME: Can the later sync in setup_cpu_entry_areas() replace
1216 * this call?
Andy Lutomirskid2b6dc62017-05-08 17:09:10 -07001217 */
Thomas Gleixner945fd172018-02-28 21:14:26 +01001218 sync_initial_page_table();
Andy Lutomirskid2b6dc62017-05-08 17:09:10 -07001219
Joseph Cihula31625342009-06-30 19:30:59 -07001220 tboot_probe();
1221
Yinghai Lu76934ed2008-06-25 17:52:35 -07001222 map_vsyscall();
Yinghai Lu76934ed2008-06-25 17:52:35 -07001223
Rusty Russell1a3f2392006-09-26 10:52:32 +02001224 generic_apic_probe();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001225
Andi Kleen54ef3402007-10-19 20:35:03 +02001226 early_quirks();
Andy Curridd44647b2006-06-08 00:43:38 -07001227
Yinghai Lu295deae2008-06-23 19:55:05 -07001228 /*
1229 * Read APIC and some other early information from ACPI tables.
1230 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001231 acpi_boot_init();
Feng Tangefafc8b2009-08-14 15:23:29 -04001232 sfi_init();
Thomas Gleixnera906fda2011-02-25 16:09:31 +01001233 x86_dtb_init();
Feng Tangefafc8b2009-08-14 15:23:29 -04001234
Yinghai Lu295deae2008-06-23 19:55:05 -07001235 /*
1236 * get boot-time SMP configuration:
1237 */
Baoquan Hea91bf712016-08-12 14:57:12 +08001238 get_smp_config();
Yinghai Lu76934ed2008-06-25 17:52:35 -07001239
Thomas Gleixner1e90a132016-10-29 13:42:42 +02001240 /*
1241 * Systems w/o ACPI and mptables might not have it mapped the local
1242 * APIC yet, but prefill_possible_map() might need to access it.
1243 */
1244 init_apic_mappings();
1245
Yinghai Lu329513a2008-07-02 18:54:40 -07001246 prefill_possible_map();
Yinghai Lu301e6192008-08-19 20:50:02 -07001247
Yinghai Lu5f4765f2008-07-02 18:53:44 -07001248 init_cpu_to_node();
Yinghai Lu5f4765f2008-07-02 18:53:44 -07001249
Thomas Gleixnerca1b8862015-04-24 13:57:48 +02001250 io_apic_init_mappings();
Yinghai Lu9d6a4d02008-08-19 20:50:52 -07001251
Juergen Grossf3614642017-11-09 14:27:38 +01001252 x86_init.hyper.guest_late_init();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001253
Ingo Molnar1506c8d2017-01-28 22:41:14 +01001254 e820__reserve_resources();
Ingo Molnar090d7172017-01-28 22:44:12 +01001255 e820__register_nosave_regions(max_low_pfn);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001256
Thomas Gleixner8fee6972009-08-19 14:55:50 +02001257 x86_init.resources.reserve_resources();
Yinghai Lu41c094f2008-06-16 13:03:31 -07001258
Ingo Molnar2df908b2017-01-28 14:16:38 +01001259 e820__setup_pci_gap();
Yinghai Lu41c094f2008-06-16 13:03:31 -07001260
Linus Torvalds1da177e2005-04-16 15:20:36 -07001261#ifdef CONFIG_VT
1262#if defined(CONFIG_VGA_CONSOLE)
Matt Fleming83e68182012-11-14 09:42:35 +00001263 if (!efi_enabled(EFI_BOOT) || (efi_mem_type(0xa0000) != EFI_CONVENTIONAL_MEMORY))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001264 conswitchp = &vga_con;
1265#elif defined(CONFIG_DUMMY_CONSOLE)
1266 conswitchp = &dummy_con;
1267#endif
1268#endif
Thomas Gleixner6f30c1a2009-08-20 13:19:57 +02001269 x86_init.oem.banner();
Yong Wanga2202aa2009-11-10 09:38:24 +08001270
Feng Tang6b617e22011-02-15 00:13:31 +08001271 x86_init.timers.wallclock_init();
1272
Yong Wanga2202aa2009-11-10 09:38:24 +08001273 mcheck_init();
Jason Baronf49aa442010-09-17 11:08:51 -04001274
H. Peter Anvindc326fc2011-04-18 15:19:51 -07001275 arch_init_ideal_nops();
John Stultzb3c869d2012-09-04 12:42:27 -04001276
1277 register_refined_jiffies(CLOCK_TICK_RATE);
Olof Johansson5189c2a2012-10-24 10:00:44 -07001278
1279#ifdef CONFIG_EFI
Borislav Petkova5d90c92014-03-04 17:02:17 +01001280 if (efi_enabled(EFI_BOOT))
1281 efi_apply_memmap_quirks();
Olof Johansson5189c2a2012-10-24 10:00:44 -07001282#endif
Josh Poimboeufee9f8fc2017-07-24 18:36:57 -05001283
1284 unwind_init();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001285}
Ingo Molnar5649b7c2008-09-16 09:29:09 +02001286
Ingo Molnar9be1b562009-02-17 23:12:48 +01001287#ifdef CONFIG_X86_32
Ingo Molnar5649b7c2008-09-16 09:29:09 +02001288
Thomas Gleixner8fee6972009-08-19 14:55:50 +02001289static struct resource video_ram_resource = {
1290 .name = "Video RAM area",
1291 .start = 0xa0000,
1292 .end = 0xbffff,
1293 .flags = IORESOURCE_BUSY | IORESOURCE_MEM
Ingo Molnar9be1b562009-02-17 23:12:48 +01001294};
1295
Thomas Gleixner8fee6972009-08-19 14:55:50 +02001296void __init i386_reserve_resources(void)
Ingo Molnar9be1b562009-02-17 23:12:48 +01001297{
Thomas Gleixner8fee6972009-08-19 14:55:50 +02001298 request_resource(&iomem_resource, &video_ram_resource);
1299 reserve_standard_io_resources();
Ingo Molnar9be1b562009-02-17 23:12:48 +01001300}
1301
Ingo Molnar9be1b562009-02-17 23:12:48 +01001302#endif /* CONFIG_X86_32 */
Kees Cookf32360e2013-10-10 17:18:17 -07001303
1304static struct notifier_block kernel_offset_notifier = {
1305 .notifier_call = dump_kernel_offset
1306};
1307
1308static int __init register_kernel_offset_dumper(void)
1309{
1310 atomic_notifier_chain_register(&panic_notifier_list,
1311 &kernel_offset_notifier);
1312 return 0;
1313}
1314__initcall(register_kernel_offset_dumper);
Dave Hansenc1192f82016-02-12 13:02:27 -08001315
1316void arch_show_smap(struct seq_file *m, struct vm_area_struct *vma)
1317{
1318 if (!boot_cpu_has(X86_FEATURE_OSPKE))
1319 return;
1320
1321 seq_printf(m, "ProtectionKey: %8u\n", vma_pkey(vma));
1322}