Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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> |
Andy Whitcroft | 05b79bd | 2005-06-23 00:07:57 -0700 | [diff] [blame] | 26 | #include <linux/mmzone.h> |
Jon Smirl | 894673e | 2006-07-10 04:44:13 -0700 | [diff] [blame] | 27 | #include <linux/screen_info.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | #include <linux/ioport.h> |
| 29 | #include <linux/acpi.h> |
Feng Tang | efafc8b | 2009-08-14 15:23:29 -0400 | [diff] [blame] | 30 | #include <linux/sfi.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | #include <linux/apm_bios.h> |
| 32 | #include <linux/initrd.h> |
| 33 | #include <linux/bootmem.h> |
Yinghai Lu | 72d7c3b | 2010-08-25 13:39:17 -0700 | [diff] [blame] | 34 | #include <linux/memblock.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | #include <linux/seq_file.h> |
| 36 | #include <linux/console.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | #include <linux/root_dev.h> |
| 38 | #include <linux/highmem.h> |
Paul Gortmaker | 186f436 | 2016-07-13 20:18:56 -0400 | [diff] [blame] | 39 | #include <linux/export.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | #include <linux/efi.h> |
| 41 | #include <linux/init.h> |
| 42 | #include <linux/edd.h> |
Konrad Rzeszutek | 138fe4e | 2008-04-09 19:50:41 -0700 | [diff] [blame] | 43 | #include <linux/iscsi_ibft.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | #include <linux/nodemask.h> |
Eric W. Biederman | 1bc3b91 | 2005-06-25 14:58:01 -0700 | [diff] [blame] | 45 | #include <linux/kexec.h> |
Andi Kleen | e992867 | 2006-01-11 22:43:33 +0100 | [diff] [blame] | 46 | #include <linux/dmi.h> |
Dave Hansen | 22a9835 | 2006-03-27 01:16:04 -0800 | [diff] [blame] | 47 | #include <linux/pfn.h> |
Thomas Gleixner | 376ff03 | 2008-01-30 13:30:16 +0100 | [diff] [blame] | 48 | #include <linux/pci.h> |
Yinghai Lu | 46d671b | 2008-06-25 17:51:29 -0700 | [diff] [blame] | 49 | #include <asm/pci-direct.h> |
Bernhard Kaindl | f212ec4 | 2008-01-30 13:34:11 +0100 | [diff] [blame] | 50 | #include <linux/init_ohci1394_dma.h> |
Glauber de Oliveira Costa | 790c73f | 2008-02-15 17:52:48 -0200 | [diff] [blame] | 51 | #include <linux/kvm_para.h> |
Marek Szyprowski | 0a2b9a6 | 2011-12-29 13:09:51 +0100 | [diff] [blame] | 52 | #include <linux/dma-contiguous.h> |
Petr Tesarik | 3db3eb2 | 2018-04-25 12:08:35 +0200 | [diff] [blame] | 53 | #include <xen/xen.h> |
Eric W. Biederman | 1bc3b91 | 2005-06-25 14:58:01 -0700 | [diff] [blame] | 54 | |
Yinghai Lu | 46d671b | 2008-06-25 17:51:29 -0700 | [diff] [blame] | 55 | #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 Lu | 46d671b | 2008-06-25 17:51:29 -0700 | [diff] [blame] | 60 | #include <linux/user.h> |
| 61 | #include <linux/delay.h> |
Yinghai Lu | 46d671b | 2008-06-25 17:51:29 -0700 | [diff] [blame] | 62 | |
| 63 | #include <linux/kallsyms.h> |
Yinghai Lu | 46d671b | 2008-06-25 17:51:29 -0700 | [diff] [blame] | 64 | #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 Wang | 69575d3 | 2009-09-01 18:25:07 -0700 | [diff] [blame] | 71 | #include <linux/tboot.h> |
John Stultz | b3c869d | 2012-09-04 12:42:27 -0400 | [diff] [blame] | 72 | #include <linux/jiffies.h> |
Tom Lendacky | b9d0520 | 2017-07-17 16:10:11 -0500 | [diff] [blame] | 73 | #include <linux/mem_encrypt.h> |
Yinghai Lu | 46d671b | 2008-06-25 17:51:29 -0700 | [diff] [blame] | 74 | |
Lu Baolu | 1b5aeeb | 2017-03-21 16:01:31 +0800 | [diff] [blame] | 75 | #include <linux/usb/xhci-dbgp.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | #include <video/edid.h> |
Eric W. Biederman | 1bc3b91 | 2005-06-25 14:58:01 -0700 | [diff] [blame] | 77 | |
Yinghai Lu | 093af8d | 2008-01-30 13:33:32 +0100 | [diff] [blame] | 78 | #include <asm/mtrr.h> |
Eric W. Biederman | 9635b47 | 2005-06-25 14:57:41 -0700 | [diff] [blame] | 79 | #include <asm/apic.h> |
Jarkko Sakkinen | 084ee1c6 | 2012-05-08 21:22:26 +0300 | [diff] [blame] | 80 | #include <asm/realmode.h> |
Ingo Molnar | 66441bd | 2017-01-27 10:27:10 +0100 | [diff] [blame] | 81 | #include <asm/e820/api.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | #include <asm/mpspec.h> |
| 83 | #include <asm/setup.h> |
Yinghai Lu | 55f2623 | 2008-06-25 17:54:23 -0700 | [diff] [blame] | 84 | #include <asm/efi.h> |
Ingo Molnar | 8e6dafd | 2009-02-23 00:34:39 +0100 | [diff] [blame] | 85 | #include <asm/timer.h> |
| 86 | #include <asm/i8259.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 87 | #include <asm/sections.h> |
| 88 | #include <asm/io_apic.h> |
| 89 | #include <asm/ist.h> |
Ingo Molnar | 1164dd0 | 2009-01-28 19:34:09 +0100 | [diff] [blame] | 90 | #include <asm/setup_arch.h> |
Alexey Starikovskiy | ce3fe6b | 2008-03-17 22:08:17 +0300 | [diff] [blame] | 91 | #include <asm/bios_ebda.h> |
Bernhard Walle | 00bf409 | 2007-10-21 16:42:01 -0700 | [diff] [blame] | 92 | #include <asm/cacheflush.h> |
Alexander van Heukelum | 2fde61f | 2008-03-04 19:57:42 +0100 | [diff] [blame] | 93 | #include <asm/processor.h> |
Yinghai Lu | cc9f7a0 | 2008-06-16 16:11:08 -0700 | [diff] [blame] | 94 | #include <asm/bugs.h> |
Andrey Ryabinin | ef7f0d6 | 2015-02-13 14:39:25 -0800 | [diff] [blame] | 95 | #include <asm/kasan.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | |
Yinghai Lu | 46d671b | 2008-06-25 17:51:29 -0700 | [diff] [blame] | 97 | #include <asm/vsyscall.h> |
Jaswinder Singh Rajput | 6e5385d | 2009-01-07 18:11:35 +0530 | [diff] [blame] | 98 | #include <asm/cpu.h> |
Yinghai Lu | 46d671b | 2008-06-25 17:51:29 -0700 | [diff] [blame] | 99 | #include <asm/desc.h> |
| 100 | #include <asm/dma.h> |
FUJITA Tomonori | 46a7fa2 | 2008-07-11 10:23:42 +0900 | [diff] [blame] | 101 | #include <asm/iommu.h> |
Joerg Roedel | 1d9b16d | 2008-11-27 18:39:15 +0100 | [diff] [blame] | 102 | #include <asm/gart.h> |
Yinghai Lu | 46d671b | 2008-06-25 17:51:29 -0700 | [diff] [blame] | 103 | #include <asm/mmu_context.h> |
| 104 | #include <asm/proto.h> |
| 105 | |
Yinghai Lu | 46d671b | 2008-06-25 17:51:29 -0700 | [diff] [blame] | 106 | #include <asm/paravirt.h> |
Alok Kataria | 88b094f | 2008-10-27 10:41:46 -0700 | [diff] [blame] | 107 | #include <asm/hypervisor.h> |
Andres Salomon | fd699c7 | 2010-06-18 17:46:53 -0400 | [diff] [blame] | 108 | #include <asm/olpc_ofw.h> |
Yinghai Lu | 46d671b | 2008-06-25 17:51:29 -0700 | [diff] [blame] | 109 | |
| 110 | #include <asm/percpu.h> |
Yinghai Lu | 46d671b | 2008-06-25 17:51:29 -0700 | [diff] [blame] | 111 | #include <asm/topology.h> |
| 112 | #include <asm/apicdef.h> |
Andreas Herrmann | 23ac4ae | 2010-09-17 18:03:43 +0200 | [diff] [blame] | 113 | #include <asm/amd_nb.h> |
Yong Wang | a2202aa | 2009-11-10 09:38:24 +0800 | [diff] [blame] | 114 | #include <asm/mce.h> |
Jason Baron | f49aa44 | 2010-09-17 11:08:51 -0400 | [diff] [blame] | 115 | #include <asm/alternative.h> |
Sebastian Andrzej Siewior | da6b737 | 2011-02-22 21:07:37 +0100 | [diff] [blame] | 116 | #include <asm/prom.h> |
Borislav Petkov | 9a2bc33 | 2015-10-20 11:54:44 +0200 | [diff] [blame] | 117 | #include <asm/microcode.h> |
Thomas Garnier | 0483e1f | 2016-06-21 17:47:02 -0700 | [diff] [blame] | 118 | #include <asm/kaslr.h> |
Josh Poimboeuf | ee9f8fc | 2017-07-24 18:36:57 -0500 | [diff] [blame] | 119 | #include <asm/unwind.h> |
Yinghai Lu | 46d671b | 2008-06-25 17:51:29 -0700 | [diff] [blame] | 120 | |
Pekka Enberg | 2b72394 | 2009-04-28 16:00:49 +0300 | [diff] [blame] | 121 | /* |
Jacob Shin | 66520eb | 2012-11-16 19:38:52 -0800 | [diff] [blame] | 122 | * max_low_pfn_mapped: highest direct mapped pfn under 4GB |
| 123 | * max_pfn_mapped: highest direct mapped pfn over 4GB |
| 124 | * |
Ingo Molnar | 09821ff | 2017-01-28 17:09:33 +0100 | [diff] [blame] | 125 | * The direct mapping only covers E820_TYPE_RAM regions, so the ranges and gaps are |
Jacob Shin | 66520eb | 2012-11-16 19:38:52 -0800 | [diff] [blame] | 126 | * represented by pfn_mapped |
Pekka Enberg | 2b72394 | 2009-04-28 16:00:49 +0300 | [diff] [blame] | 127 | */ |
| 128 | unsigned long max_low_pfn_mapped; |
| 129 | unsigned long max_pfn_mapped; |
| 130 | |
Thadeu Lima de Souza Cascardo | e808bae | 2010-02-09 21:38:45 -0200 | [diff] [blame] | 131 | #ifdef CONFIG_DMI |
Jeremy Fitzhardinge | 796216a | 2009-03-12 16:09:49 -0700 | [diff] [blame] | 132 | RESERVE_BRK(dmi_alloc, 65536); |
Thadeu Lima de Souza Cascardo | e808bae | 2010-02-09 21:38:45 -0200 | [diff] [blame] | 133 | #endif |
Jeremy Fitzhardinge | 796216a | 2009-03-12 16:09:49 -0700 | [diff] [blame] | 134 | |
Ingo Molnar | c0b5842 | 2009-01-27 17:13:05 +0100 | [diff] [blame] | 135 | |
Jeremy Fitzhardinge | 93dbda7 | 2009-02-26 17:35:44 -0800 | [diff] [blame] | 136 | static __initdata unsigned long _brk_start = (unsigned long)__brk_base; |
| 137 | unsigned long _brk_end = (unsigned long)__brk_base; |
| 138 | |
Yinghai Lu | 217b8ce | 2008-06-25 17:55:20 -0700 | [diff] [blame] | 139 | struct boot_params boot_params; |
Yinghai Lu | 217b8ce | 2008-06-25 17:55:20 -0700 | [diff] [blame] | 140 | |
Linus Torvalds | 4046d6e | 2016-04-14 11:18:57 -0700 | [diff] [blame] | 141 | /* |
| 142 | * Machine setup.. |
| 143 | */ |
| 144 | static struct resource data_resource = { |
| 145 | .name = "Kernel data", |
| 146 | .start = 0, |
| 147 | .end = 0, |
| 148 | .flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM |
| 149 | }; |
| 150 | |
| 151 | static struct resource code_resource = { |
| 152 | .name = "Kernel code", |
| 153 | .start = 0, |
| 154 | .end = 0, |
| 155 | .flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM |
| 156 | }; |
| 157 | |
| 158 | static 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 Lu | 7dea23e | 2008-06-25 17:50:06 -0700 | [diff] [blame] | 166 | #ifdef CONFIG_X86_32 |
Mathias Krause | 6415813 | 2017-02-12 22:12:08 +0100 | [diff] [blame] | 167 | /* cpu data as detected by the assembly code in head_32.S */ |
| 168 | struct cpuinfo_x86 new_cpu_data; |
| 169 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 170 | /* common cpu data for all cpus */ |
Mathias Krause | 6415813 | 2017-02-12 22:12:08 +0100 | [diff] [blame] | 171 | struct cpuinfo_x86 boot_cpu_data __read_mostly; |
Alexey Dobriyan | 129f694 | 2005-06-23 00:08:33 -0700 | [diff] [blame] | 172 | EXPORT_SYMBOL(boot_cpu_data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | |
Alexey Starikovskiy | 0c254e3 | 2008-03-27 23:55:04 +0300 | [diff] [blame] | 174 | unsigned int def_to_bigsmp; |
| 175 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 176 | /* for MCA, but anyone else can use it if they want */ |
| 177 | unsigned int machine_id; |
| 178 | unsigned int machine_submodel_id; |
| 179 | unsigned int BIOS_revision; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 180 | |
Yinghai Lu | 7dea23e | 2008-06-25 17:50:06 -0700 | [diff] [blame] | 181 | struct apm_info apm_info; |
| 182 | EXPORT_SYMBOL(apm_info); |
| 183 | |
| 184 | #if defined(CONFIG_X86_SPEEDSTEP_SMI) || \ |
| 185 | defined(CONFIG_X86_SPEEDSTEP_SMI_MODULE) |
| 186 | struct ist_info ist_info; |
| 187 | EXPORT_SYMBOL(ist_info); |
| 188 | #else |
| 189 | struct ist_info ist_info; |
| 190 | #endif |
| 191 | |
| 192 | #else |
Kirill A. Shutemov | 162434e | 2018-02-14 14:16:54 +0300 | [diff] [blame] | 193 | struct cpuinfo_x86 boot_cpu_data __read_mostly; |
Yinghai Lu | 7dea23e | 2008-06-25 17:50:06 -0700 | [diff] [blame] | 194 | EXPORT_SYMBOL(boot_cpu_data); |
| 195 | #endif |
| 196 | |
| 197 | |
| 198 | #if !defined(CONFIG_X86_PAE) || defined(CONFIG_X86_64) |
Kees Cook | 404f6aa | 2016-08-08 16:29:06 -0700 | [diff] [blame] | 199 | __visible unsigned long mmu_cr4_features __ro_after_init; |
Yinghai Lu | 7dea23e | 2008-06-25 17:50:06 -0700 | [diff] [blame] | 200 | #else |
Kees Cook | 404f6aa | 2016-08-08 16:29:06 -0700 | [diff] [blame] | 201 | __visible unsigned long mmu_cr4_features __ro_after_init = X86_CR4_PAE; |
Yinghai Lu | 7dea23e | 2008-06-25 17:50:06 -0700 | [diff] [blame] | 202 | #endif |
| 203 | |
H. Peter Anvin | 5031296 | 2009-05-07 16:54:11 -0700 | [diff] [blame] | 204 | /* Boot loader ID and version as integers, for the benefit of proc_dointvec */ |
| 205 | int bootloader_type, bootloader_version; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 206 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 207 | /* |
| 208 | * Setup options |
| 209 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 210 | struct screen_info screen_info; |
Alexey Dobriyan | 129f694 | 2005-06-23 00:08:33 -0700 | [diff] [blame] | 211 | EXPORT_SYMBOL(screen_info); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 212 | struct edid_info edid_info; |
Antonino A. Daplas | 5e518d7 | 2005-09-09 13:04:34 -0700 | [diff] [blame] | 213 | EXPORT_SYMBOL_GPL(edid_info); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 214 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 215 | extern int root_mountflags; |
| 216 | |
Pavel Machek | e44b7b7 | 2008-04-10 23:28:10 +0200 | [diff] [blame] | 217 | unsigned long saved_video_mode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 218 | |
H. Peter Anvin | cf8fa92 | 2008-01-30 13:32:51 +0100 | [diff] [blame] | 219 | #define RAMDISK_IMAGE_START_MASK 0x07FF |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 220 | #define RAMDISK_PROMPT_FLAG 0x8000 |
H. Peter Anvin | cf8fa92 | 2008-01-30 13:32:51 +0100 | [diff] [blame] | 221 | #define RAMDISK_LOAD_FLAG 0x4000 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 222 | |
Alon Bar-Lev | 4e498b6 | 2007-02-12 00:54:11 -0800 | [diff] [blame] | 223 | static char __initdata command_line[COMMAND_LINE_SIZE]; |
Tim Bird | 516cbf3 | 2008-08-12 12:52:36 -0700 | [diff] [blame] | 224 | #ifdef CONFIG_CMDLINE_BOOL |
| 225 | static char __initdata builtin_cmdline[COMMAND_LINE_SIZE] = CONFIG_CMDLINE; |
| 226 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 227 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 228 | #if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE) |
| 229 | struct edd edd; |
| 230 | #ifdef CONFIG_EDD_MODULE |
| 231 | EXPORT_SYMBOL(edd); |
| 232 | #endif |
| 233 | /** |
| 234 | * copy_edd() - Copy the BIOS EDD information |
| 235 | * from boot_params into a safe place. |
| 236 | * |
| 237 | */ |
Helight.Xu | 9eaa192 | 2009-11-30 18:33:51 +0800 | [diff] [blame] | 238 | static inline void __init copy_edd(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 239 | { |
H. Peter Anvin | 30c8264 | 2007-10-15 17:13:22 -0700 | [diff] [blame] | 240 | 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 245 | } |
| 246 | #else |
Helight.Xu | 9eaa192 | 2009-11-30 18:33:51 +0800 | [diff] [blame] | 247 | static inline void __init copy_edd(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 248 | { |
| 249 | } |
| 250 | #endif |
| 251 | |
H. Peter Anvin | 5368a2b | 2009-03-14 17:19:51 -0700 | [diff] [blame] | 252 | void * __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 Lu | 148b209 | 2012-11-16 19:39:08 -0800 | [diff] [blame] | 271 | #ifdef CONFIG_X86_32 |
Yinghai Lu | e5f15b4 | 2011-02-18 11:30:30 +0000 | [diff] [blame] | 272 | static void __init cleanup_highmap(void) |
Yinghai Lu | f005fe1 | 2010-12-27 16:48:32 -0800 | [diff] [blame] | 273 | { |
| 274 | } |
Pekka J Enberg | 854c879 | 2009-06-22 17:39:41 +0300 | [diff] [blame] | 275 | #endif |
| 276 | |
H. Peter Anvin | 5368a2b | 2009-03-14 17:19:51 -0700 | [diff] [blame] | 277 | static void __init reserve_brk(void) |
| 278 | { |
| 279 | if (_brk_end > _brk_start) |
Alexander Duyck | fc8d782 | 2012-11-16 13:57:13 -0800 | [diff] [blame] | 280 | memblock_reserve(__pa_symbol(_brk_start), |
| 281 | _brk_end - _brk_start); |
H. Peter Anvin | 5368a2b | 2009-03-14 17:19:51 -0700 | [diff] [blame] | 282 | |
| 283 | /* Mark brk area as locked down and no longer taking any |
| 284 | new allocations */ |
| 285 | _brk_start = 0; |
| 286 | } |
| 287 | |
Borislav Petkov | 5aa3d71 | 2013-12-04 20:50:42 +0100 | [diff] [blame] | 288 | u64 relocated_ramdisk; |
| 289 | |
H. Peter Anvin | cf8fa92 | 2008-01-30 13:32:51 +0100 | [diff] [blame] | 290 | #ifdef CONFIG_BLK_DEV_INITRD |
| 291 | |
Yinghai Lu | a8a51a8 | 2013-01-24 12:19:56 -0800 | [diff] [blame] | 292 | static u64 __init get_ramdisk_image(void) |
| 293 | { |
| 294 | u64 ramdisk_image = boot_params.hdr.ramdisk_image; |
| 295 | |
Yinghai Lu | ee92d81 | 2013-01-28 20:16:44 -0800 | [diff] [blame] | 296 | ramdisk_image |= (u64)boot_params.ext_ramdisk_image << 32; |
| 297 | |
Yinghai Lu | a8a51a8 | 2013-01-24 12:19:56 -0800 | [diff] [blame] | 298 | return ramdisk_image; |
| 299 | } |
| 300 | static u64 __init get_ramdisk_size(void) |
| 301 | { |
| 302 | u64 ramdisk_size = boot_params.hdr.ramdisk_size; |
| 303 | |
Yinghai Lu | ee92d81 | 2013-01-28 20:16:44 -0800 | [diff] [blame] | 304 | ramdisk_size |= (u64)boot_params.ext_ramdisk_size << 32; |
| 305 | |
Yinghai Lu | a8a51a8 | 2013-01-24 12:19:56 -0800 | [diff] [blame] | 306 | return ramdisk_size; |
| 307 | } |
| 308 | |
Yinghai Lu | eb1379c | 2008-06-25 17:49:26 -0700 | [diff] [blame] | 309 | static void __init relocate_initrd(void) |
H. Peter Anvin | cf8fa92 | 2008-01-30 13:32:51 +0100 | [diff] [blame] | 310 | { |
Yinghai Lu | c967da6 | 2010-03-28 19:42:55 -0700 | [diff] [blame] | 311 | /* Assume only end is not page aligned */ |
Yinghai Lu | a8a51a8 | 2013-01-24 12:19:56 -0800 | [diff] [blame] | 312 | u64 ramdisk_image = get_ramdisk_image(); |
| 313 | u64 ramdisk_size = get_ramdisk_size(); |
Yinghai Lu | c967da6 | 2010-03-28 19:42:55 -0700 | [diff] [blame] | 314 | u64 area_size = PAGE_ALIGN(ramdisk_size); |
H. Peter Anvin | cf8fa92 | 2008-01-30 13:32:51 +0100 | [diff] [blame] | 315 | |
Yinghai Lu | e8c57d4 | 2012-11-16 19:38:51 -0800 | [diff] [blame] | 316 | /* We need to move the initrd down into directly mapped mem */ |
Borislav Petkov | 5aa3d71 | 2013-12-04 20:50:42 +0100 | [diff] [blame] | 317 | relocated_ramdisk = memblock_find_in_range(0, PFN_PHYS(max_pfn_mapped), |
| 318 | area_size, PAGE_SIZE); |
H. Peter Anvin | cf8fa92 | 2008-01-30 13:32:51 +0100 | [diff] [blame] | 319 | |
Borislav Petkov | 5aa3d71 | 2013-12-04 20:50:42 +0100 | [diff] [blame] | 320 | if (!relocated_ramdisk) |
Yinghai Lu | 3945e2c | 2008-05-25 10:00:09 -0700 | [diff] [blame] | 321 | panic("Cannot find place for new RAMDISK of size %lld\n", |
Borislav Petkov | 5aa3d71 | 2013-12-04 20:50:42 +0100 | [diff] [blame] | 322 | ramdisk_size); |
Yinghai Lu | 3945e2c | 2008-05-25 10:00:09 -0700 | [diff] [blame] | 323 | |
Yinghai Lu | e8c57d4 | 2012-11-16 19:38:51 -0800 | [diff] [blame] | 324 | /* Note: this includes all the mem currently occupied by |
H. Peter Anvin | cf8fa92 | 2008-01-30 13:32:51 +0100 | [diff] [blame] | 325 | the initrd, we rely on that fact to keep the data intact. */ |
Borislav Petkov | 5aa3d71 | 2013-12-04 20:50:42 +0100 | [diff] [blame] | 326 | memblock_reserve(relocated_ramdisk, area_size); |
| 327 | initrd_start = relocated_ramdisk + PAGE_OFFSET; |
H. Peter Anvin | cf8fa92 | 2008-01-30 13:32:51 +0100 | [diff] [blame] | 328 | initrd_end = initrd_start + ramdisk_size; |
Bjorn Helgaas | 365811d | 2012-05-29 15:06:29 -0700 | [diff] [blame] | 329 | printk(KERN_INFO "Allocated new RAMDISK: [mem %#010llx-%#010llx]\n", |
Borislav Petkov | 5aa3d71 | 2013-12-04 20:50:42 +0100 | [diff] [blame] | 330 | relocated_ramdisk, relocated_ramdisk + ramdisk_size - 1); |
H. Peter Anvin | cf8fa92 | 2008-01-30 13:32:51 +0100 | [diff] [blame] | 331 | |
Mark Salter | 5dd2c4b | 2015-09-08 15:03:07 -0700 | [diff] [blame] | 332 | copy_from_early_mem((void *)initrd_start, ramdisk_image, ramdisk_size); |
H. Peter Anvin | cf8fa92 | 2008-01-30 13:32:51 +0100 | [diff] [blame] | 333 | |
Bjorn Helgaas | 365811d | 2012-05-29 15:06:29 -0700 | [diff] [blame] | 334 | printk(KERN_INFO "Move RAMDISK from [mem %#010llx-%#010llx] to" |
| 335 | " [mem %#010llx-%#010llx]\n", |
Yinghai Lu | ba5b14cc | 2008-05-21 18:40:18 -0700 | [diff] [blame] | 336 | ramdisk_image, ramdisk_image + ramdisk_size - 1, |
Borislav Petkov | 5aa3d71 | 2013-12-04 20:50:42 +0100 | [diff] [blame] | 337 | relocated_ramdisk, relocated_ramdisk + ramdisk_size - 1); |
Yinghai Lu | eb1379c | 2008-06-25 17:49:26 -0700 | [diff] [blame] | 338 | } |
Yinghai Lu | 9a27f5c | 2008-06-13 20:07:03 -0700 | [diff] [blame] | 339 | |
Yinghai Lu | 1b8c78b | 2013-01-24 12:19:55 -0800 | [diff] [blame] | 340 | static void __init early_reserve_initrd(void) |
| 341 | { |
| 342 | /* Assume only end is not page aligned */ |
Yinghai Lu | a8a51a8 | 2013-01-24 12:19:56 -0800 | [diff] [blame] | 343 | u64 ramdisk_image = get_ramdisk_image(); |
| 344 | u64 ramdisk_size = get_ramdisk_size(); |
Yinghai Lu | 1b8c78b | 2013-01-24 12:19:55 -0800 | [diff] [blame] | 345 | 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 Lu | eb1379c | 2008-06-25 17:49:26 -0700 | [diff] [blame] | 353 | static void __init reserve_initrd(void) |
| 354 | { |
Yinghai Lu | c967da6 | 2010-03-28 19:42:55 -0700 | [diff] [blame] | 355 | /* Assume only end is not page aligned */ |
Yinghai Lu | a8a51a8 | 2013-01-24 12:19:56 -0800 | [diff] [blame] | 356 | u64 ramdisk_image = get_ramdisk_image(); |
| 357 | u64 ramdisk_size = get_ramdisk_size(); |
Yinghai Lu | c967da6 | 2010-03-28 19:42:55 -0700 | [diff] [blame] | 358 | u64 ramdisk_end = PAGE_ALIGN(ramdisk_image + ramdisk_size); |
Yinghai Lu | e8c57d4 | 2012-11-16 19:38:51 -0800 | [diff] [blame] | 359 | u64 mapped_size; |
Yinghai Lu | eb1379c | 2008-06-25 17:49:26 -0700 | [diff] [blame] | 360 | |
| 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 Lu | 595ad9a | 2013-01-24 12:20:09 -0800 | [diff] [blame] | 367 | mapped_size = memblock_mem_size(max_pfn_mapped); |
Yinghai Lu | e8c57d4 | 2012-11-16 19:38:51 -0800 | [diff] [blame] | 368 | if (ramdisk_size >= (mapped_size>>1)) |
Peter Jones | ab7b64e | 2012-05-16 13:43:26 -0400 | [diff] [blame] | 369 | panic("initrd too large to handle, " |
| 370 | "disabling initrd (%lld needed, %lld available)\n", |
Yinghai Lu | e8c57d4 | 2012-11-16 19:38:51 -0800 | [diff] [blame] | 371 | ramdisk_size, mapped_size>>1); |
Yinghai Lu | eb1379c | 2008-06-25 17:49:26 -0700 | [diff] [blame] | 372 | |
Bjorn Helgaas | 365811d | 2012-05-29 15:06:29 -0700 | [diff] [blame] | 373 | printk(KERN_INFO "RAMDISK: [mem %#010llx-%#010llx]\n", ramdisk_image, |
| 374 | ramdisk_end - 1); |
Yinghai Lu | eb1379c | 2008-06-25 17:49:26 -0700 | [diff] [blame] | 375 | |
Yinghai Lu | 74f2765 | 2012-11-16 19:38:53 -0800 | [diff] [blame] | 376 | if (pfn_range_is_mapped(PFN_DOWN(ramdisk_image), |
Yinghai Lu | e8c57d4 | 2012-11-16 19:38:51 -0800 | [diff] [blame] | 377 | PFN_DOWN(ramdisk_end))) { |
| 378 | /* All are mapped, easy case */ |
Yinghai Lu | eb1379c | 2008-06-25 17:49:26 -0700 | [diff] [blame] | 379 | initrd_start = ramdisk_image + PAGE_OFFSET; |
| 380 | initrd_end = initrd_start + ramdisk_size; |
| 381 | return; |
| 382 | } |
| 383 | |
Yinghai Lu | eb1379c | 2008-06-25 17:49:26 -0700 | [diff] [blame] | 384 | relocate_initrd(); |
Yinghai Lu | 8c5dd8f | 2009-06-04 19:14:22 -0700 | [diff] [blame] | 385 | |
Tejun Heo | 24aa078 | 2011-07-12 11:16:06 +0200 | [diff] [blame] | 386 | memblock_free(ramdisk_image, ramdisk_end - ramdisk_image); |
H. Peter Anvin | cf8fa92 | 2008-01-30 13:32:51 +0100 | [diff] [blame] | 387 | } |
Lv Zheng | af06f8b | 2016-04-11 10:13:27 +0800 | [diff] [blame] | 388 | |
Yinghai Lu | 225c37d | 2008-06-22 02:46:58 -0700 | [diff] [blame] | 389 | #else |
Yinghai Lu | 1b8c78b | 2013-01-24 12:19:55 -0800 | [diff] [blame] | 390 | static void __init early_reserve_initrd(void) |
| 391 | { |
| 392 | } |
Yinghai Lu | eb1379c | 2008-06-25 17:49:26 -0700 | [diff] [blame] | 393 | static void __init reserve_initrd(void) |
Yinghai Lu | 225c37d | 2008-06-22 02:46:58 -0700 | [diff] [blame] | 394 | { |
| 395 | } |
H. Peter Anvin | cf8fa92 | 2008-01-30 13:32:51 +0100 | [diff] [blame] | 396 | #endif /* CONFIG_BLK_DEV_INITRD */ |
| 397 | |
Yinghai Lu | 29f784e | 2008-06-25 18:00:22 -0700 | [diff] [blame] | 398 | static void __init parse_setup_data(void) |
Yinghai Lu | 257b0fd | 2008-06-25 17:56:22 -0700 | [diff] [blame] | 399 | { |
| 400 | struct setup_data *data; |
Linn Crosetto | 30e46b5 | 2013-08-13 15:46:41 -0600 | [diff] [blame] | 401 | u64 pa_data, pa_next; |
Yinghai Lu | 257b0fd | 2008-06-25 17:56:22 -0700 | [diff] [blame] | 402 | |
Yinghai Lu | 257b0fd | 2008-06-25 17:56:22 -0700 | [diff] [blame] | 403 | pa_data = boot_params.hdr.setup_data; |
| 404 | while (pa_data) { |
WANG Chao | 7389882 | 2015-01-07 18:55:48 +0800 | [diff] [blame] | 405 | u32 data_len, data_type; |
Sebastian Andrzej Siewior | f1c2b35 | 2011-02-22 21:07:36 +0100 | [diff] [blame] | 406 | |
WANG Chao | 7389882 | 2015-01-07 18:55:48 +0800 | [diff] [blame] | 407 | data = early_memremap(pa_data, sizeof(*data)); |
Sebastian Andrzej Siewior | f1c2b35 | 2011-02-22 21:07:36 +0100 | [diff] [blame] | 408 | data_len = data->len + sizeof(struct setup_data); |
Linn Crosetto | 30e46b5 | 2013-08-13 15:46:41 -0600 | [diff] [blame] | 409 | data_type = data->type; |
| 410 | pa_next = data->next; |
Juergen Gross | 8d4a40b | 2015-02-24 10:13:28 +0100 | [diff] [blame] | 411 | early_memunmap(data, sizeof(*data)); |
Sebastian Andrzej Siewior | f1c2b35 | 2011-02-22 21:07:36 +0100 | [diff] [blame] | 412 | |
Linn Crosetto | 30e46b5 | 2013-08-13 15:46:41 -0600 | [diff] [blame] | 413 | switch (data_type) { |
Yinghai Lu | 257b0fd | 2008-06-25 17:56:22 -0700 | [diff] [blame] | 414 | case SETUP_E820_EXT: |
Ingo Molnar | 914053c | 2017-01-28 13:18:40 +0100 | [diff] [blame] | 415 | e820__memory_setup_extended(pa_data, data_len); |
Yinghai Lu | 257b0fd | 2008-06-25 17:56:22 -0700 | [diff] [blame] | 416 | break; |
Sebastian Andrzej Siewior | da6b737 | 2011-02-22 21:07:37 +0100 | [diff] [blame] | 417 | case SETUP_DTB: |
| 418 | add_dtb(pa_data); |
Yinghai Lu | 257b0fd | 2008-06-25 17:56:22 -0700 | [diff] [blame] | 419 | break; |
Dave Young | 1fec053 | 2013-12-20 18:02:19 +0800 | [diff] [blame] | 420 | case SETUP_EFI: |
| 421 | parse_efi_setup(pa_data, data_len); |
| 422 | break; |
Yinghai Lu | 257b0fd | 2008-06-25 17:56:22 -0700 | [diff] [blame] | 423 | default: |
| 424 | break; |
| 425 | } |
Linn Crosetto | 30e46b5 | 2013-08-13 15:46:41 -0600 | [diff] [blame] | 426 | pa_data = pa_next; |
Yinghai Lu | 257b0fd | 2008-06-25 17:56:22 -0700 | [diff] [blame] | 427 | } |
| 428 | } |
| 429 | |
Yinghai Lu | a9ce6bc | 2010-08-25 13:39:17 -0700 | [diff] [blame] | 430 | static void __init memblock_x86_reserve_range_setup_data(void) |
Yinghai Lu | a0a0bec | 2008-07-03 11:37:13 -0700 | [diff] [blame] | 431 | { |
| 432 | struct setup_data *data; |
| 433 | u64 pa_data; |
Yinghai Lu | a0a0bec | 2008-07-03 11:37:13 -0700 | [diff] [blame] | 434 | |
Yinghai Lu | a0a0bec | 2008-07-03 11:37:13 -0700 | [diff] [blame] | 435 | pa_data = boot_params.hdr.setup_data; |
| 436 | while (pa_data) { |
Jeremy Fitzhardinge | 88b4c14 | 2008-09-07 15:21:16 -0700 | [diff] [blame] | 437 | data = early_memremap(pa_data, sizeof(*data)); |
Tejun Heo | 24aa078 | 2011-07-12 11:16:06 +0200 | [diff] [blame] | 438 | memblock_reserve(pa_data, sizeof(*data) + data->len); |
Yinghai Lu | a0a0bec | 2008-07-03 11:37:13 -0700 | [diff] [blame] | 439 | pa_data = data->next; |
Juergen Gross | 8d4a40b | 2015-02-24 10:13:28 +0100 | [diff] [blame] | 440 | early_memunmap(data, sizeof(*data)); |
Yinghai Lu | a0a0bec | 2008-07-03 11:37:13 -0700 | [diff] [blame] | 441 | } |
| 442 | } |
| 443 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 444 | /* |
Yinghai Lu | ccb4def | 2008-06-25 17:57:13 -0700 | [diff] [blame] | 445 | * --------- Crashkernel reservation ------------------------------ |
| 446 | */ |
| 447 | |
Dave Young | 2965faa | 2015-09-09 15:38:55 -0700 | [diff] [blame] | 448 | #ifdef CONFIG_KEXEC_CORE |
Bernhard Walle | 32105f7 | 2008-06-26 21:54:08 +0200 | [diff] [blame] | 449 | |
Borislav Petkov | 606134f | 2015-10-19 11:17:44 +0200 | [diff] [blame] | 450 | /* 16M alignment for crash kernel regions */ |
| 451 | #define CRASH_ALIGN (16 << 20) |
| 452 | |
H. Peter Anvin | 7f8595b | 2010-12-16 19:20:41 -0800 | [diff] [blame] | 453 | /* |
| 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 Lu | 55a20ee | 2013-04-15 22:23:47 -0700 | [diff] [blame] | 456 | * On 64bit, old kexec-tools need to under 896MiB. |
H. Peter Anvin | 7f8595b | 2010-12-16 19:20:41 -0800 | [diff] [blame] | 457 | */ |
| 458 | #ifdef CONFIG_X86_32 |
Borislav Petkov | 97eac21 | 2015-10-19 11:17:43 +0200 | [diff] [blame] | 459 | # define CRASH_ADDR_LOW_MAX (512 << 20) |
| 460 | # define CRASH_ADDR_HIGH_MAX (512 << 20) |
H. Peter Anvin | 7f8595b | 2010-12-16 19:20:41 -0800 | [diff] [blame] | 461 | #else |
Borislav Petkov | 97eac21 | 2015-10-19 11:17:43 +0200 | [diff] [blame] | 462 | # define CRASH_ADDR_LOW_MAX (896UL << 20) |
| 463 | # define CRASH_ADDR_HIGH_MAX MAXMEM |
H. Peter Anvin | 7f8595b | 2010-12-16 19:20:41 -0800 | [diff] [blame] | 464 | #endif |
| 465 | |
Baoquan He | eb6db83 | 2015-10-19 11:17:41 +0200 | [diff] [blame] | 466 | static int __init reserve_crashkernel_low(void) |
Yinghai Lu | 0212f91 | 2013-01-24 12:20:11 -0800 | [diff] [blame] | 467 | { |
| 468 | #ifdef CONFIG_X86_64 |
Borislav Petkov | f56d557 | 2015-10-19 11:17:45 +0200 | [diff] [blame] | 469 | unsigned long long base, low_base = 0, low_size = 0; |
Yinghai Lu | 0212f91 | 2013-01-24 12:20:11 -0800 | [diff] [blame] | 470 | unsigned long total_low_mem; |
Yinghai Lu | 0212f91 | 2013-01-24 12:20:11 -0800 | [diff] [blame] | 471 | int ret; |
| 472 | |
Borislav Petkov | 97eac21 | 2015-10-19 11:17:43 +0200 | [diff] [blame] | 473 | total_low_mem = memblock_mem_size(1UL << (32 - PAGE_SHIFT)); |
| 474 | |
Yinghai Lu | adbc742 | 2013-04-15 22:23:48 -0700 | [diff] [blame] | 475 | /* crashkernel=Y,low */ |
Borislav Petkov | 97eac21 | 2015-10-19 11:17:43 +0200 | [diff] [blame] | 476 | ret = parse_crashkernel_low(boot_command_line, total_low_mem, &low_size, &base); |
Borislav Petkov | f56d557 | 2015-10-19 11:17:45 +0200 | [diff] [blame] | 477 | if (ret) { |
Yinghai Lu | c729de8 | 2013-04-15 22:23:45 -0700 | [diff] [blame] | 478 | /* |
| 479 | * two parts from lib/swiotlb.c: |
Joerg Roedel | 94fb933 | 2015-06-10 17:49:42 +0200 | [diff] [blame] | 480 | * -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 Lu | c729de8 | 2013-04-15 22:23:45 -0700 | [diff] [blame] | 486 | */ |
Borislav Petkov | 97eac21 | 2015-10-19 11:17:43 +0200 | [diff] [blame] | 487 | low_size = max(swiotlb_size_or_default() + (8UL << 20), 256UL << 20); |
Yinghai Lu | c729de8 | 2013-04-15 22:23:45 -0700 | [diff] [blame] | 488 | } else { |
Yinghai Lu | adbc742 | 2013-04-15 22:23:48 -0700 | [diff] [blame] | 489 | /* passed with crashkernel=0,low ? */ |
Yinghai Lu | c729de8 | 2013-04-15 22:23:45 -0700 | [diff] [blame] | 490 | if (!low_size) |
Baoquan He | eb6db83 | 2015-10-19 11:17:41 +0200 | [diff] [blame] | 491 | return 0; |
Yinghai Lu | c729de8 | 2013-04-15 22:23:45 -0700 | [diff] [blame] | 492 | } |
Yinghai Lu | 0212f91 | 2013-01-24 12:20:11 -0800 | [diff] [blame] | 493 | |
Jiri Bohac | fe2d48b | 2017-06-16 18:16:02 +0200 | [diff] [blame] | 494 | low_base = memblock_find_in_range(0, 1ULL << 32, low_size, CRASH_ALIGN); |
Yinghai Lu | 0212f91 | 2013-01-24 12:20:11 -0800 | [diff] [blame] | 495 | if (!low_base) { |
Baoquan He | eb6db83 | 2015-10-19 11:17:41 +0200 | [diff] [blame] | 496 | pr_err("Cannot reserve %ldMB crashkernel low memory, please try smaller size.\n", |
| 497 | (unsigned long)(low_size >> 20)); |
| 498 | return -ENOMEM; |
Yinghai Lu | 0212f91 | 2013-01-24 12:20:11 -0800 | [diff] [blame] | 499 | } |
| 500 | |
Borislav Petkov | 6f376057 | 2015-10-19 11:17:46 +0200 | [diff] [blame] | 501 | 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 Petkov | 97eac21 | 2015-10-19 11:17:43 +0200 | [diff] [blame] | 506 | |
Yinghai Lu | 0212f91 | 2013-01-24 12:20:11 -0800 | [diff] [blame] | 507 | pr_info("Reserving %ldMB of low memory at %ldMB for crashkernel (System low RAM: %ldMB)\n", |
Borislav Petkov | 97eac21 | 2015-10-19 11:17:43 +0200 | [diff] [blame] | 508 | (unsigned long)(low_size >> 20), |
| 509 | (unsigned long)(low_base >> 20), |
| 510 | (unsigned long)(total_low_mem >> 20)); |
| 511 | |
Yinghai Lu | 0212f91 | 2013-01-24 12:20:11 -0800 | [diff] [blame] | 512 | 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 He | eb6db83 | 2015-10-19 11:17:41 +0200 | [diff] [blame] | 516 | return 0; |
Yinghai Lu | 0212f91 | 2013-01-24 12:20:11 -0800 | [diff] [blame] | 517 | } |
| 518 | |
Yinghai Lu | 29f784e | 2008-06-25 18:00:22 -0700 | [diff] [blame] | 519 | static void __init reserve_crashkernel(void) |
Yinghai Lu | ccb4def | 2008-06-25 17:57:13 -0700 | [diff] [blame] | 520 | { |
Borislav Petkov | f56d557 | 2015-10-19 11:17:45 +0200 | [diff] [blame] | 521 | unsigned long long crash_size, crash_base, total_mem; |
Yinghai Lu | 55a20ee | 2013-04-15 22:23:47 -0700 | [diff] [blame] | 522 | bool high = false; |
Yinghai Lu | ccb4def | 2008-06-25 17:57:13 -0700 | [diff] [blame] | 523 | int ret; |
| 524 | |
Dave Young | 09c71bf | 2012-03-28 14:42:47 -0700 | [diff] [blame] | 525 | total_mem = memblock_phys_mem_size(); |
Yinghai Lu | ccb4def | 2008-06-25 17:57:13 -0700 | [diff] [blame] | 526 | |
Yinghai Lu | 55a20ee | 2013-04-15 22:23:47 -0700 | [diff] [blame] | 527 | /* crashkernel=XM */ |
Borislav Petkov | 97eac21 | 2015-10-19 11:17:43 +0200 | [diff] [blame] | 528 | ret = parse_crashkernel(boot_command_line, total_mem, &crash_size, &crash_base); |
Yinghai Lu | 55a20ee | 2013-04-15 22:23:47 -0700 | [diff] [blame] | 529 | if (ret != 0 || crash_size <= 0) { |
Yinghai Lu | adbc742 | 2013-04-15 22:23:48 -0700 | [diff] [blame] | 530 | /* crashkernel=X,high */ |
Yinghai Lu | 55a20ee | 2013-04-15 22:23:47 -0700 | [diff] [blame] | 531 | ret = parse_crashkernel_high(boot_command_line, total_mem, |
Borislav Petkov | 97eac21 | 2015-10-19 11:17:43 +0200 | [diff] [blame] | 532 | &crash_size, &crash_base); |
Yinghai Lu | 55a20ee | 2013-04-15 22:23:47 -0700 | [diff] [blame] | 533 | if (ret != 0 || crash_size <= 0) |
| 534 | return; |
| 535 | high = true; |
| 536 | } |
Bernhard Walle | 32105f7 | 2008-06-26 21:54:08 +0200 | [diff] [blame] | 537 | |
Petr Tesarik | 3db3eb2 | 2018-04-25 12:08:35 +0200 | [diff] [blame] | 538 | if (xen_pv_domain()) { |
| 539 | pr_info("Ignoring crashkernel for a Xen PV domain\n"); |
| 540 | return; |
| 541 | } |
| 542 | |
Bernhard Walle | 32105f7 | 2008-06-26 21:54:08 +0200 | [diff] [blame] | 543 | /* 0 means: find the address automatically */ |
| 544 | if (crash_base <= 0) { |
Yinghai Lu | 9f4c139 | 2010-10-05 16:05:14 -0700 | [diff] [blame] | 545 | /* |
Xunlei Pang | a8d4c82 | 2017-01-23 14:48:23 +0800 | [diff] [blame] | 546 | * 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 Lu | 9f4c139 | 2010-10-05 16:05:14 -0700 | [diff] [blame] | 549 | */ |
Borislav Petkov | 606134f | 2015-10-19 11:17:44 +0200 | [diff] [blame] | 550 | crash_base = memblock_find_in_range(CRASH_ALIGN, |
Borislav Petkov | 97eac21 | 2015-10-19 11:17:43 +0200 | [diff] [blame] | 551 | high ? CRASH_ADDR_HIGH_MAX |
| 552 | : CRASH_ADDR_LOW_MAX, |
Borislav Petkov | 606134f | 2015-10-19 11:17:44 +0200 | [diff] [blame] | 553 | crash_size, CRASH_ALIGN); |
Tejun Heo | 1f5026a | 2011-07-12 09:58:09 +0200 | [diff] [blame] | 554 | if (!crash_base) { |
Yinghai Lu | 4428073 | 2009-11-22 17:18:49 -0800 | [diff] [blame] | 555 | pr_info("crashkernel reservation failed - No suitable area found.\n"); |
Yinghai Lu | ccb4def | 2008-06-25 17:57:13 -0700 | [diff] [blame] | 556 | return; |
| 557 | } |
Yinghai Lu | 0212f91 | 2013-01-24 12:20:11 -0800 | [diff] [blame] | 558 | |
Bernhard Walle | 32105f7 | 2008-06-26 21:54:08 +0200 | [diff] [blame] | 559 | } else { |
Yinghai Lu | 4428073 | 2009-11-22 17:18:49 -0800 | [diff] [blame] | 560 | unsigned long long start; |
| 561 | |
Yinghai Lu | 9f4c139 | 2010-10-05 16:05:14 -0700 | [diff] [blame] | 562 | start = memblock_find_in_range(crash_base, |
Borislav Petkov | 97eac21 | 2015-10-19 11:17:43 +0200 | [diff] [blame] | 563 | crash_base + crash_size, |
| 564 | crash_size, 1 << 20); |
Yinghai Lu | 4428073 | 2009-11-22 17:18:49 -0800 | [diff] [blame] | 565 | if (start != crash_base) { |
| 566 | pr_info("crashkernel reservation failed - memory is in use.\n"); |
Yinghai Lu | ccb4def | 2008-06-25 17:57:13 -0700 | [diff] [blame] | 567 | return; |
| 568 | } |
Yinghai Lu | ccb4def | 2008-06-25 17:57:13 -0700 | [diff] [blame] | 569 | } |
Borislav Petkov | 6f376057 | 2015-10-19 11:17:46 +0200 | [diff] [blame] | 570 | ret = memblock_reserve(crash_base, crash_size); |
| 571 | if (ret) { |
| 572 | pr_err("%s: Error reserving crashkernel memblock.\n", __func__); |
| 573 | return; |
| 574 | } |
Bernhard Walle | 32105f7 | 2008-06-26 21:54:08 +0200 | [diff] [blame] | 575 | |
Baoquan He | eb6db83 | 2015-10-19 11:17:41 +0200 | [diff] [blame] | 576 | if (crash_base >= (1ULL << 32) && reserve_crashkernel_low()) { |
| 577 | memblock_free(crash_base, crash_size); |
| 578 | return; |
| 579 | } |
| 580 | |
Borislav Petkov | f56d557 | 2015-10-19 11:17:45 +0200 | [diff] [blame] | 581 | 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 Walle | 32105f7 | 2008-06-26 21:54:08 +0200 | [diff] [blame] | 585 | |
| 586 | crashk_res.start = crash_base; |
| 587 | crashk_res.end = crash_base + crash_size - 1; |
| 588 | insert_resource(&iomem_resource, &crashk_res); |
Yinghai Lu | ccb4def | 2008-06-25 17:57:13 -0700 | [diff] [blame] | 589 | } |
| 590 | #else |
Yinghai Lu | 29f784e | 2008-06-25 18:00:22 -0700 | [diff] [blame] | 591 | static void __init reserve_crashkernel(void) |
Yinghai Lu | ccb4def | 2008-06-25 17:57:13 -0700 | [diff] [blame] | 592 | { |
| 593 | } |
| 594 | #endif |
| 595 | |
Yinghai Lu | bdba0e7 | 2008-06-25 17:58:02 -0700 | [diff] [blame] | 596 | static 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 Gleixner | 8fee697 | 2009-08-19 14:55:50 +0200 | [diff] [blame] | 619 | void __init reserve_standard_io_resources(void) |
Yinghai Lu | bdba0e7 | 2008-06-25 17:58:02 -0700 | [diff] [blame] | 620 | { |
| 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 Lu | 042be38 | 2010-04-01 14:32:43 -0700 | [diff] [blame] | 629 | static __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 Heo | 24aa078 | 2011-07-12 11:16:06 +0200 | [diff] [blame] | 636 | memblock_reserve(addr, size); |
Yinghai Lu | 042be38 | 2010-04-01 14:32:43 -0700 | [diff] [blame] | 637 | } |
| 638 | |
Jesse Barnes | a9acc53 | 2012-11-14 20:43:31 +0000 | [diff] [blame] | 639 | static bool __init snb_gfx_workaround_needed(void) |
| 640 | { |
H. Peter Anvin | e43b3ce | 2013-01-13 20:56:41 -0800 | [diff] [blame] | 641 | #ifdef CONFIG_PCI |
Jesse Barnes | a9acc53 | 2012-11-14 20:43:31 +0000 | [diff] [blame] | 642 | int i; |
| 643 | u16 vendor, devid; |
H. Peter Anvin | ab3cd86 | 2013-01-13 20:36:39 -0800 | [diff] [blame] | 644 | static const __initconst u16 snb_ids[] = { |
Jesse Barnes | a9acc53 | 2012-11-14 20:43:31 +0000 | [diff] [blame] | 645 | 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 Anvin | e43b3ce | 2013-01-13 20:56:41 -0800 | [diff] [blame] | 666 | #endif |
Jesse Barnes | a9acc53 | 2012-11-14 20:43:31 +0000 | [diff] [blame] | 667 | |
| 668 | return false; |
| 669 | } |
| 670 | |
| 671 | /* |
| 672 | * Sandy Bridge graphics has trouble with certain ranges, exclude |
| 673 | * them from allocation. |
| 674 | */ |
| 675 | static void __init trim_snb_memory(void) |
| 676 | { |
H. Peter Anvin | ab3cd86 | 2013-01-13 20:36:39 -0800 | [diff] [blame] | 677 | static const __initconst unsigned long bad_pages[] = { |
Jesse Barnes | a9acc53 | 2012-11-14 20:43:31 +0000 | [diff] [blame] | 678 | 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 | */ |
| 711 | static void __init trim_platform_memory_ranges(void) |
| 712 | { |
| 713 | trim_snb_memory(); |
| 714 | } |
| 715 | |
Yinghai Lu | 1b5576e | 2010-01-22 11:21:04 +0800 | [diff] [blame] | 716 | static 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 Anvin | d0cd742 | 2010-08-24 17:32:04 -0700 | [diff] [blame] | 722 | * |
| 723 | * This typically reserves additional memory (64KiB by default) |
| 724 | * since some BIOSes are known to corrupt low memory. See the |
H. Peter Anvin | 9ea77bd | 2010-08-25 16:38:20 -0700 | [diff] [blame] | 725 | * Kconfig help text for X86_RESERVE_LOW. |
Yinghai Lu | 1b5576e | 2010-01-22 11:21:04 +0800 | [diff] [blame] | 726 | */ |
Ingo Molnar | 09821ff | 2017-01-28 17:09:33 +0100 | [diff] [blame] | 727 | e820__range_update(0, PAGE_SIZE, E820_TYPE_RAM, E820_TYPE_RESERVED); |
H. Peter Anvin | d0cd742 | 2010-08-24 17:32:04 -0700 | [diff] [blame] | 728 | |
Yinghai Lu | 1b5576e | 2010-01-22 11:21:04 +0800 | [diff] [blame] | 729 | /* |
| 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 Molnar | 09821ff | 2017-01-28 17:09:33 +0100 | [diff] [blame] | 734 | e820__range_remove(BIOS_BEGIN, BIOS_END - BIOS_BEGIN, E820_TYPE_RAM, 1); |
Jesse Barnes | a9acc53 | 2012-11-14 20:43:31 +0000 | [diff] [blame] | 735 | |
Ingo Molnar | f9748fa | 2017-01-28 18:00:35 +0100 | [diff] [blame] | 736 | e820__update_table(e820_table); |
Yinghai Lu | 1b5576e | 2010-01-22 11:21:04 +0800 | [diff] [blame] | 737 | } |
| 738 | |
Yinghai Lu | b422a30 | 2013-01-24 12:19:45 -0800 | [diff] [blame] | 739 | /* called before trim_bios_range() to spare extra sanitize */ |
| 740 | static void __init e820_add_kernel_range(void) |
| 741 | { |
| 742 | u64 start = __pa_symbol(_text); |
| 743 | u64 size = __pa_symbol(_end) - start; |
| 744 | |
| 745 | /* |
Ingo Molnar | 09821ff | 2017-01-28 17:09:33 +0100 | [diff] [blame] | 746 | * Complain if .text .data and .bss are not marked as E820_TYPE_RAM and |
Yinghai Lu | b422a30 | 2013-01-24 12:19:45 -0800 | [diff] [blame] | 747 | * 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 Molnar | 09821ff | 2017-01-28 17:09:33 +0100 | [diff] [blame] | 752 | if (e820__mapped_all(start, start + size, E820_TYPE_RAM)) |
Yinghai Lu | b422a30 | 2013-01-24 12:19:45 -0800 | [diff] [blame] | 753 | return; |
| 754 | |
Ingo Molnar | 09821ff | 2017-01-28 17:09:33 +0100 | [diff] [blame] | 755 | 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 Lu | b422a30 | 2013-01-24 12:19:45 -0800 | [diff] [blame] | 758 | } |
| 759 | |
H. Peter Anvin | 95c9608 | 2013-02-14 14:02:52 -0800 | [diff] [blame] | 760 | static unsigned reserve_low = CONFIG_X86_RESERVE_LOW << 10; |
| 761 | |
H. Peter Anvin | 9ea77bd | 2010-08-25 16:38:20 -0700 | [diff] [blame] | 762 | static 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 | |
| 782 | early_param("reservelow", parse_reservelow); |
| 783 | |
H. Peter Anvin | 95c9608 | 2013-02-14 14:02:52 -0800 | [diff] [blame] | 784 | static void __init trim_low_memory_range(void) |
| 785 | { |
| 786 | memblock_reserve(0, ALIGN(reserve_low, PAGE_SIZE)); |
| 787 | } |
| 788 | |
Jeremy Fitzhardinge | 5394f80 | 2008-09-07 01:51:32 -0700 | [diff] [blame] | 789 | /* |
Kees Cook | f32360e | 2013-10-10 17:18:17 -0700 | [diff] [blame] | 790 | * Dump out kernel offset information on panic. |
| 791 | */ |
| 792 | static int |
| 793 | dump_kernel_offset(struct notifier_block *self, unsigned long v, void *p) |
| 794 | { |
Borislav Petkov | 78cac48 | 2015-04-01 12:49:52 +0200 | [diff] [blame] | 795 | if (kaslr_enabled()) { |
| 796 | pr_emerg("Kernel Offset: 0x%lx from 0x%lx (relocation range: 0x%lx-0x%lx)\n", |
Jiri Kosina | 4545c89 | 2015-04-27 13:17:19 +0200 | [diff] [blame] | 797 | kaslr_offset(), |
Borislav Petkov | 78cac48 | 2015-04-01 12:49:52 +0200 | [diff] [blame] | 798 | __START_KERNEL, |
| 799 | __START_KERNEL_map, |
| 800 | MODULES_VADDR-1); |
| 801 | } else { |
| 802 | pr_emerg("Kernel Offset: disabled\n"); |
| 803 | } |
Kees Cook | f32360e | 2013-10-10 17:18:17 -0700 | [diff] [blame] | 804 | |
| 805 | return 0; |
| 806 | } |
| 807 | |
| 808 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 809 | * 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 Lu | 76934ed | 2008-06-25 17:52:35 -0700 | [diff] [blame] | 815 | /* |
| 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 821 | void __init setup_arch(char **cmdline_p) |
| 822 | { |
Yinghai Lu | 6c902b6 | 2013-01-24 12:20:12 -0800 | [diff] [blame] | 823 | memblock_reserve(__pa_symbol(_text), |
| 824 | (unsigned long)__bss_stop - (unsigned long)_text); |
| 825 | |
Yinghai Lu | 1b8c78b | 2013-01-24 12:19:55 -0800 | [diff] [blame] | 826 | early_reserve_initrd(); |
| 827 | |
Yinghai Lu | 6c902b6 | 2013-01-24 12:20:12 -0800 | [diff] [blame] | 828 | /* |
| 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 Lu | 76934ed | 2008-06-25 17:52:35 -0700 | [diff] [blame] | 834 | #ifdef CONFIG_X86_32 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 835 | memcpy(&boot_cpu_data, &new_cpu_data, sizeof(new_cpu_data)); |
Borislav Petkov | b40827fa | 2010-08-28 15:58:33 +0200 | [diff] [blame] | 836 | |
| 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'Donoghue | 2075244 | 2014-10-07 01:19:48 +0100 | [diff] [blame] | 846 | /* |
| 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 Petkov | b40827fa | 2010-08-28 15:58:33 +0200 | [diff] [blame] | 855 | __flush_tlb_all(); |
Yinghai Lu | 76934ed | 2008-06-25 17:52:35 -0700 | [diff] [blame] | 856 | #else |
| 857 | printk(KERN_INFO "Command line: %s\n", boot_command_line); |
Kirill A. Shutemov | 162434e | 2018-02-14 14:16:54 +0300 | [diff] [blame] | 858 | boot_cpu_data.x86_phys_bits = MAX_PHYSMEM_BITS; |
Yinghai Lu | 76934ed | 2008-06-25 17:52:35 -0700 | [diff] [blame] | 859 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 860 | |
Alok Kataria | 9863c90 | 2010-08-23 14:49:11 -0700 | [diff] [blame] | 861 | /* |
| 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 Salomon | fd699c7 | 2010-06-18 17:46:53 -0400 | [diff] [blame] | 865 | olpc_ofw_detect(); |
| 866 | |
Thomas Gleixner | 433f892 | 2017-08-28 08:47:50 +0200 | [diff] [blame] | 867 | idt_setup_early_traps(); |
Jeremy Fitzhardinge | 9e882c9 | 2008-07-21 16:49:54 -0700 | [diff] [blame] | 868 | early_cpu_init(); |
Jeremy Fitzhardinge | 1a98fd1 | 2008-06-29 20:02:44 -0700 | [diff] [blame] | 869 | early_ioremap_init(); |
| 870 | |
Andres Salomon | fd699c7 | 2010-06-18 17:46:53 -0400 | [diff] [blame] | 871 | setup_olpc_ofw_pgd(); |
| 872 | |
H. Peter Anvin | 30c8264 | 2007-10-15 17:13:22 -0700 | [diff] [blame] | 873 | 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 Lu | 76934ed | 2008-06-25 17:52:35 -0700 | [diff] [blame] | 876 | #ifdef CONFIG_X86_32 |
H. Peter Anvin | 30c8264 | 2007-10-15 17:13:22 -0700 | [diff] [blame] | 877 | apm_info.bios = boot_params.apm_bios_info; |
| 878 | ist_info = boot_params.ist_info; |
Yinghai Lu | 76934ed | 2008-06-25 17:52:35 -0700 | [diff] [blame] | 879 | #endif |
| 880 | saved_video_mode = boot_params.hdr.vid_mode; |
H. Peter Anvin | 30c8264 | 2007-10-15 17:13:22 -0700 | [diff] [blame] | 881 | bootloader_type = boot_params.hdr.type_of_loader; |
H. Peter Anvin | 5031296 | 2009-05-07 16:54:11 -0700 | [diff] [blame] | 882 | 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 888 | |
| 889 | #ifdef CONFIG_BLK_DEV_RAM |
H. Peter Anvin | 30c8264 | 2007-10-15 17:13:22 -0700 | [diff] [blame] | 890 | 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 893 | #endif |
Yinghai Lu | 7465252 | 2008-06-23 19:53:33 -0700 | [diff] [blame] | 894 | #ifdef CONFIG_EFI |
| 895 | if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature, |
Daniel Kiper | 9402973 | 2014-06-30 19:53:03 +0200 | [diff] [blame] | 896 | EFI32_LOADER_SIGNATURE, 4)) { |
Matt Fleming | 3e90959 | 2014-01-15 13:21:22 +0000 | [diff] [blame] | 897 | set_bit(EFI_BOOT, &efi.flags); |
Olof Johansson | 1adbfa3 | 2012-02-12 13:24:29 -0800 | [diff] [blame] | 898 | } else if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature, |
Daniel Kiper | 9402973 | 2014-06-30 19:53:03 +0200 | [diff] [blame] | 899 | EFI64_LOADER_SIGNATURE, 4)) { |
Matt Fleming | 3e90959 | 2014-01-15 13:21:22 +0000 | [diff] [blame] | 900 | set_bit(EFI_BOOT, &efi.flags); |
| 901 | set_bit(EFI_64BIT, &efi.flags); |
Yinghai Lu | 7465252 | 2008-06-23 19:53:33 -0700 | [diff] [blame] | 902 | } |
| 903 | #endif |
| 904 | |
Thomas Gleixner | 42bbdb4 | 2009-08-20 13:04:10 +0200 | [diff] [blame] | 905 | x86_init.oem.arch_setup(); |
Huang, Ying | 2215e69 | 2008-01-30 13:31:19 +0100 | [diff] [blame] | 906 | |
Bjorn Helgaas | 419afdf | 2010-10-26 15:41:49 -0600 | [diff] [blame] | 907 | iomem_resource.end = (1ULL << boot_cpu_data.x86_phys_bits) - 1; |
Ingo Molnar | 103e206 | 2017-01-28 09:58:49 +0100 | [diff] [blame] | 908 | e820__memory_setup(); |
Yinghai Lu | 28bb223 | 2008-06-30 16:20:54 -0700 | [diff] [blame] | 909 | parse_setup_data(); |
| 910 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 911 | copy_edd(); |
| 912 | |
H. Peter Anvin | 30c8264 | 2007-10-15 17:13:22 -0700 | [diff] [blame] | 913 | if (!boot_params.hdr.root_flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 914 | 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 Fitzhardinge | 93dbda7 | 2009-02-26 17:35:44 -0800 | [diff] [blame] | 918 | init_mm.brk = _brk_end; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 919 | |
Dave Hansen | fe3d197 | 2014-11-14 07:18:29 -0800 | [diff] [blame] | 920 | mpx_mm_init(&init_mm); |
| 921 | |
Linus Torvalds | 4046d6e | 2016-04-14 11:18:57 -0700 | [diff] [blame] | 922 | 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 Bird | 516cbf3 | 2008-08-12 12:52:36 -0700 | [diff] [blame] | 929 | #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 Lu | eda6da9 | 2009-09-19 11:07:57 -0700 | [diff] [blame] | 942 | strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE); |
| 943 | *cmdline_p = command_line; |
| 944 | |
Yinghai Lu | eda6da9 | 2009-09-19 11:07:57 -0700 | [diff] [blame] | 945 | /* |
Kees Cook | 4b0f3b8 | 2009-11-13 15:28:17 -0800 | [diff] [blame] | 946 | * 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 Lu | eda6da9 | 2009-09-19 11:07:57 -0700 | [diff] [blame] | 951 | */ |
H. Peter Anvin | 4763ed4 | 2009-11-13 15:28:16 -0800 | [diff] [blame] | 952 | x86_configure_nx(); |
Yinghai Lu | eda6da9 | 2009-09-19 11:07:57 -0700 | [diff] [blame] | 953 | |
| 954 | parse_early_param(); |
| 955 | |
Dave Young | 835bcec | 2018-01-02 17:21:09 +0000 | [diff] [blame] | 956 | if (efi_enabled(EFI_BOOT)) |
| 957 | efi_memblock_x86_reserve_range(); |
Reza Arbab | 39fa104d | 2016-12-12 16:42:55 -0800 | [diff] [blame] | 958 | #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 Cook | 4b0f3b8 | 2009-11-13 15:28:17 -0800 | [diff] [blame] | 982 | x86_report_nx(); |
Jeremy Fitzhardinge | 0ad5bce | 2008-09-11 16:42:00 -0700 | [diff] [blame] | 983 | |
Yinghai Lu | 28bb223 | 2008-06-30 16:20:54 -0700 | [diff] [blame] | 984 | /* after early param, so could get panic from serial */ |
Yinghai Lu | a9ce6bc | 2010-08-25 13:39:17 -0700 | [diff] [blame] | 985 | memblock_x86_reserve_range_setup_data(); |
Yinghai Lu | 28bb223 | 2008-06-30 16:20:54 -0700 | [diff] [blame] | 986 | |
Yinghai Lu | 76934ed | 2008-06-25 17:52:35 -0700 | [diff] [blame] | 987 | if (acpi_mps_check()) { |
Ingo Molnar | 3eb11ed | 2008-06-23 22:19:22 +0200 | [diff] [blame] | 988 | #ifdef CONFIG_X86_LOCAL_APIC |
Yinghai Lu | 76934ed | 2008-06-25 17:52:35 -0700 | [diff] [blame] | 989 | disable_apic = 1; |
| 990 | #endif |
Yinghai Lu | 988781d | 2008-07-21 11:21:43 -0700 | [diff] [blame] | 991 | setup_clear_cpu_cap(X86_FEATURE_APIC); |
Yinghai Lu | 3c999f1 | 2008-06-20 16:11:20 -0700 | [diff] [blame] | 992 | } |
| 993 | |
Linus Torvalds | dc7c65d | 2008-07-16 17:25:46 -0700 | [diff] [blame] | 994 | #ifdef CONFIG_PCI |
| 995 | if (pci_early_dump_regs) |
| 996 | early_dump_pci_devices(); |
Glauber de Oliveira Costa | 4fe29a8 | 2008-03-19 14:25:23 -0300 | [diff] [blame] | 997 | #endif |
Linus Torvalds | dc7c65d | 2008-07-16 17:25:46 -0700 | [diff] [blame] | 998 | |
Ingo Molnar | 1a12703 | 2017-01-28 22:27:28 +0100 | [diff] [blame] | 999 | e820__reserve_setup_data(); |
Ingo Molnar | 9641bda | 2017-01-28 13:37:17 +0100 | [diff] [blame] | 1000 | e820__finish_early_params(); |
Rusty Russell | 1a3f239 | 2006-09-26 10:52:32 +0200 | [diff] [blame] | 1001 | |
Matt Fleming | 83e6818 | 2012-11-14 09:42:35 +0000 | [diff] [blame] | 1002 | if (efi_enabled(EFI_BOOT)) |
Brian Maly | ff0c087 | 2009-03-03 21:55:31 -0500 | [diff] [blame] | 1003 | efi_init(); |
| 1004 | |
Yinghai Lu | 2216d19 | 2008-09-22 02:52:26 -0700 | [diff] [blame] | 1005 | dmi_scan_machine(); |
Chen, Gong | dd6dad4 | 2013-10-18 14:29:25 -0700 | [diff] [blame] | 1006 | dmi_memdev_walk(); |
Tejun Heo | 98e5e1b | 2013-04-30 15:27:15 -0700 | [diff] [blame] | 1007 | dmi_set_dump_stack_arch_desc(); |
Yinghai Lu | 2216d19 | 2008-09-22 02:52:26 -0700 | [diff] [blame] | 1008 | |
Alok Kataria | 88b094f | 2008-10-27 10:41:46 -0700 | [diff] [blame] | 1009 | /* |
| 1010 | * VMware detection requires dmi to be available, so this |
Jean Delvare | a1652bb | 2017-10-03 11:47:27 +0200 | [diff] [blame] | 1011 | * needs to be done after dmi_scan_machine(), for the boot CPU. |
Alok Kataria | 88b094f | 2008-10-27 10:41:46 -0700 | [diff] [blame] | 1012 | */ |
Thomas Gleixner | 2d82640 | 2009-08-20 17:06:25 +0200 | [diff] [blame] | 1013 | init_hypervisor_platform(); |
Alok Kataria | 88b094f | 2008-10-27 10:41:46 -0700 | [diff] [blame] | 1014 | |
Thomas Gleixner | f7cf5a5 | 2009-08-19 14:43:56 +0200 | [diff] [blame] | 1015 | x86_init.resources.probe_roms(); |
Yinghai Lu | 41c094f | 2008-06-16 13:03:31 -0700 | [diff] [blame] | 1016 | |
Linus Torvalds | 4046d6e | 2016-04-14 11:18:57 -0700 | [diff] [blame] | 1017 | /* 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 Lu | b422a30 | 2013-01-24 12:19:45 -0800 | [diff] [blame] | 1022 | e820_add_kernel_range(); |
Yinghai Lu | 1b5576e | 2010-01-22 11:21:04 +0800 | [diff] [blame] | 1023 | trim_bios_range(); |
Yinghai Lu | 76934ed | 2008-06-25 17:52:35 -0700 | [diff] [blame] | 1024 | #ifdef CONFIG_X86_32 |
Yinghai Lu | cc9f7a0 | 2008-06-16 16:11:08 -0700 | [diff] [blame] | 1025 | if (ppro_with_ram_bug()) { |
Ingo Molnar | 09821ff | 2017-01-28 17:09:33 +0100 | [diff] [blame] | 1026 | e820__range_update(0x70000000ULL, 0x40000ULL, E820_TYPE_RAM, |
| 1027 | E820_TYPE_RESERVED); |
Ingo Molnar | f9748fa | 2017-01-28 18:00:35 +0100 | [diff] [blame] | 1028 | e820__update_table(e820_table); |
Yinghai Lu | cc9f7a0 | 2008-06-16 16:11:08 -0700 | [diff] [blame] | 1029 | printk(KERN_INFO "fixed physical RAM map:\n"); |
Ingo Molnar | be0c3f0 | 2017-01-28 14:24:02 +0100 | [diff] [blame] | 1030 | e820__print_table("bad_ppro"); |
Yinghai Lu | cc9f7a0 | 2008-06-16 16:11:08 -0700 | [diff] [blame] | 1031 | } |
Yinghai Lu | 76934ed | 2008-06-25 17:52:35 -0700 | [diff] [blame] | 1032 | #else |
| 1033 | early_gart_iommu_check(); |
| 1034 | #endif |
Yinghai Lu | cc9f7a0 | 2008-06-16 16:11:08 -0700 | [diff] [blame] | 1035 | |
Yinghai Lu | 7b2a0a6 | 2008-06-03 19:35:04 -0700 | [diff] [blame] | 1036 | /* |
| 1037 | * partially used pages are not usable - thus |
| 1038 | * we are rounding upwards: |
| 1039 | */ |
Ingo Molnar | 0c6fc11 | 2017-01-28 22:52:16 +0100 | [diff] [blame] | 1040 | max_pfn = e820__end_of_ram_pfn(); |
Yinghai Lu | 7b2a0a6 | 2008-06-03 19:35:04 -0700 | [diff] [blame] | 1041 | |
Yinghai Lu | 093af8d | 2008-01-30 13:33:32 +0100 | [diff] [blame] | 1042 | /* update e820 for memory not covered by WB MTRRs */ |
| 1043 | mtrr_bp_init(); |
Yinghai Lu | 2dc807b | 2008-07-08 18:56:38 -0700 | [diff] [blame] | 1044 | if (mtrr_trim_uncached_memory(max_pfn)) |
Ingo Molnar | 0c6fc11 | 2017-01-28 22:52:16 +0100 | [diff] [blame] | 1045 | max_pfn = e820__end_of_ram_pfn(); |
Yinghai Lu | 76c32418 | 2008-03-23 00:16:49 -0700 | [diff] [blame] | 1046 | |
Igor Mammedov | 8dd3303 | 2015-12-04 14:07:05 +0100 | [diff] [blame] | 1047 | max_possible_pfn = max_pfn; |
| 1048 | |
Thomas Garnier | c7d2361 | 2016-08-09 10:11:04 -0700 | [diff] [blame] | 1049 | /* |
Mikulas Patocka | 99c13b8 | 2017-07-04 19:04:23 -0400 | [diff] [blame] | 1050 | * 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 Garnier | c7d2361 | 2016-08-09 10:11:04 -0700 | [diff] [blame] | 1057 | * 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 Lu | 76934ed | 2008-06-25 17:52:35 -0700 | [diff] [blame] | 1062 | #ifdef CONFIG_X86_32 |
Yinghai Lu | 4e29684 | 2008-06-24 12:18:14 -0700 | [diff] [blame] | 1063 | /* max_low_pfn get updated here */ |
Yinghai Lu | 2ec65f8 | 2008-06-23 03:05:30 -0700 | [diff] [blame] | 1064 | find_low_pfn_range(); |
Yinghai Lu | 76934ed | 2008-06-25 17:52:35 -0700 | [diff] [blame] | 1065 | #else |
Yinghai Lu | 06cd9a7 | 2009-02-16 17:29:58 -0800 | [diff] [blame] | 1066 | check_x2apic(); |
Yinghai Lu | 76934ed | 2008-06-25 17:52:35 -0700 | [diff] [blame] | 1067 | |
| 1068 | /* How many end-of-memory variables you have, grandma! */ |
| 1069 | /* need this before calling reserve_initrd */ |
Yinghai Lu | f361a45 | 2008-07-10 20:38:26 -0700 | [diff] [blame] | 1070 | if (max_pfn > (1UL<<(32 - PAGE_SHIFT))) |
Ingo Molnar | 0c6fc11 | 2017-01-28 22:52:16 +0100 | [diff] [blame] | 1071 | max_low_pfn = e820__end_of_low_ram_pfn(); |
Yinghai Lu | f361a45 | 2008-07-10 20:38:26 -0700 | [diff] [blame] | 1072 | else |
| 1073 | max_low_pfn = max_pfn; |
| 1074 | |
Yinghai Lu | 76934ed | 2008-06-25 17:52:35 -0700 | [diff] [blame] | 1075 | high_memory = (void *)__va(max_pfn * PAGE_SIZE - 1) + 1; |
| 1076 | #endif |
Yinghai Lu | 2ec65f8 | 2008-06-23 03:05:30 -0700 | [diff] [blame] | 1077 | |
Yinghai Lu | 893f38d | 2009-12-10 13:07:22 -0800 | [diff] [blame] | 1078 | /* |
| 1079 | * Find and reserve possible boot-time SMP configuration: |
| 1080 | */ |
| 1081 | find_smp_config(); |
| 1082 | |
Yinghai Lu | 042be38 | 2010-04-01 14:32:43 -0700 | [diff] [blame] | 1083 | reserve_ibft_region(); |
| 1084 | |
Yinghai Lu | 8d57470 | 2012-11-16 19:38:58 -0800 | [diff] [blame] | 1085 | early_alloc_pgt_buf(); |
| 1086 | |
Yinghai Lu | 72d7c3b | 2010-08-25 13:39:17 -0700 | [diff] [blame] | 1087 | /* |
Ingo Molnar | 4918e22 | 2017-01-28 11:37:42 +0100 | [diff] [blame] | 1088 | * Need to conclude brk, before e820__memblock_setup() |
Yinghai Lu | 72d7c3b | 2010-08-25 13:39:17 -0700 | [diff] [blame] | 1089 | * it could use memblock_find_in_range, could overlap with |
| 1090 | * brk area. |
| 1091 | */ |
| 1092 | reserve_brk(); |
| 1093 | |
Yinghai Lu | e5f15b4 | 2011-02-18 11:30:30 +0000 | [diff] [blame] | 1094 | cleanup_highmap(); |
| 1095 | |
Tang Chen | 2449f34 | 2013-08-14 11:44:04 +0800 | [diff] [blame] | 1096 | memblock_set_current_limit(ISA_END_ADDRESS); |
Ingo Molnar | 4918e22 | 2017-01-28 11:37:42 +0100 | [diff] [blame] | 1097 | e820__memblock_setup(); |
Yinghai Lu | 72d7c3b | 2010-08-25 13:39:17 -0700 | [diff] [blame] | 1098 | |
Andy Lutomirski | 007b756 | 2016-08-10 02:29:13 -0700 | [diff] [blame] | 1099 | reserve_bios_regions(); |
| 1100 | |
Matt Fleming | 4971531 | 2016-06-21 23:11:38 +0100 | [diff] [blame] | 1101 | if (efi_enabled(EFI_MEMMAP)) { |
| 1102 | efi_fake_memmap(); |
| 1103 | efi_find_mirror(); |
Ricardo Neri | 3dad6f7 | 2016-08-16 17:32:31 -0700 | [diff] [blame] | 1104 | efi_esrt_init(); |
Matt Fleming | 4971531 | 2016-06-21 23:11:38 +0100 | [diff] [blame] | 1105 | |
| 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 Garrett | 916f676 | 2011-05-25 09:53:13 -0400 | [diff] [blame] | 1110 | efi_reserve_boot_services(); |
Matt Fleming | 4971531 | 2016-06-21 23:11:38 +0100 | [diff] [blame] | 1111 | } |
Matthew Garrett | 916f676 | 2011-05-25 09:53:13 -0400 | [diff] [blame] | 1112 | |
Yinghai Lu | 72d7c3b | 2010-08-25 13:39:17 -0700 | [diff] [blame] | 1113 | /* preallocate 4k for mptable mpc */ |
Ingo Molnar | 5da217c | 2017-01-28 13:46:28 +0100 | [diff] [blame] | 1114 | e820__memblock_alloc_reserved_mpc_new(); |
Yinghai Lu | 72d7c3b | 2010-08-25 13:39:17 -0700 | [diff] [blame] | 1115 | |
| 1116 | #ifdef CONFIG_X86_CHECK_BIOS_CORRUPTION |
| 1117 | setup_bios_corruption_check(); |
| 1118 | #endif |
| 1119 | |
Yinghai Lu | 1005423 | 2013-01-24 12:19:54 -0800 | [diff] [blame] | 1120 | #ifdef CONFIG_X86_32 |
Bjorn Helgaas | 365811d | 2012-05-29 15:06:29 -0700 | [diff] [blame] | 1121 | printk(KERN_DEBUG "initial memory mapped: [mem 0x00000000-%#010lx]\n", |
| 1122 | (max_pfn_mapped<<PAGE_SHIFT) - 1); |
Yinghai Lu | 1005423 | 2013-01-24 12:19:54 -0800 | [diff] [blame] | 1123 | #endif |
Yinghai Lu | 72d7c3b | 2010-08-25 13:39:17 -0700 | [diff] [blame] | 1124 | |
Yinghai Lu | 4f7b9226 | 2013-01-24 12:19:51 -0800 | [diff] [blame] | 1125 | reserve_real_mode(); |
Yinghai Lu | 893f38d | 2009-12-10 13:07:22 -0800 | [diff] [blame] | 1126 | |
Jesse Barnes | a9acc53 | 2012-11-14 20:43:31 +0000 | [diff] [blame] | 1127 | trim_platform_memory_ranges(); |
H. Peter Anvin | 95c9608 | 2013-02-14 14:02:52 -0800 | [diff] [blame] | 1128 | trim_low_memory_range(); |
Jesse Barnes | a9acc53 | 2012-11-14 20:43:31 +0000 | [diff] [blame] | 1129 | |
Yinghai Lu | 22ddfca | 2012-11-16 19:38:41 -0800 | [diff] [blame] | 1130 | init_mem_mapping(); |
Pekka J Enberg | 854c879 | 2009-06-22 17:39:41 +0300 | [diff] [blame] | 1131 | |
Thomas Gleixner | 433f892 | 2017-08-28 08:47:50 +0200 | [diff] [blame] | 1132 | idt_setup_early_pf(); |
Jarkko Sakkinen | cda846f | 2012-05-08 21:22:46 +0300 | [diff] [blame] | 1133 | |
Andy Lutomirski | 18bc7bd | 2016-08-10 02:29:14 -0700 | [diff] [blame] | 1134 | /* |
| 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 Lutomirski | c7ad5ad | 2017-09-10 17:48:27 -0700 | [diff] [blame] | 1139 | * |
| 1140 | * Mask off features that don't work outside long mode (just |
| 1141 | * PCIDE for now). |
Andy Lutomirski | 18bc7bd | 2016-08-10 02:29:14 -0700 | [diff] [blame] | 1142 | */ |
Andy Lutomirski | c7ad5ad | 2017-09-10 17:48:27 -0700 | [diff] [blame] | 1143 | mmu_cr4_features = __read_cr4() & ~X86_CR4_PCIDE; |
Andy Lutomirski | 18bc7bd | 2016-08-10 02:29:14 -0700 | [diff] [blame] | 1144 | |
Yinghai Lu | 4ce7a86 | 2014-01-27 17:06:50 -0800 | [diff] [blame] | 1145 | memblock_set_current_limit(get_max_mapped()); |
Yinghai Lu | e7b3789 | 2008-06-25 21:51:28 -0700 | [diff] [blame] | 1146 | |
| 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 Travis | 162a7e7 | 2011-05-24 17:13:20 -0700 | [diff] [blame] | 1153 | init_ohci1394_dma_on_all_controllers(); |
| 1154 | #endif |
Yinghai Lu | e7b3789 | 2008-06-25 21:51:28 -0700 | [diff] [blame] | 1155 | /* Allocate bigger log buffer */ |
Yinghai Lu | 2ec65f8 | 2008-06-23 03:05:30 -0700 | [diff] [blame] | 1156 | setup_log_buf(1); |
| 1157 | |
David Howells | 9661b33 | 2017-02-06 11:22:45 +0000 | [diff] [blame] | 1158 | 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 Lu | 4428073 | 2009-11-22 17:18:49 -0800 | [diff] [blame] | 1172 | reserve_initrd(); |
| 1173 | |
Aleksey Makarov | da3d3f9 | 2016-06-20 13:56:10 +0300 | [diff] [blame] | 1174 | acpi_table_upgrade(); |
Yinghai Lu | 1c6e550 | 2008-06-17 15:41:45 -0700 | [diff] [blame] | 1175 | |
Yinghai Lu | 1c6e550 | 2008-06-17 15:41:45 -0700 | [diff] [blame] | 1176 | vsmp_init(); |
| 1177 | |
Yinghai Lu | 1c6e550 | 2008-06-17 15:41:45 -0700 | [diff] [blame] | 1178 | io_delay_init(); |
| 1179 | |
Lukas Wunner | 630b3af | 2017-08-01 14:10:41 +0200 | [diff] [blame] | 1180 | early_platform_quirks(); |
| 1181 | |
Yinghai Lu | 1c6e550 | 2008-06-17 15:41:45 -0700 | [diff] [blame] | 1182 | /* |
| 1183 | * Parse the ACPI tables for possible boot-time SMP configuration. |
Yinghai Lu | 1c6e550 | 2008-06-17 15:41:45 -0700 | [diff] [blame] | 1184 | */ |
Yinghai Lu | 20e6926 | 2013-03-01 14:51:27 -0800 | [diff] [blame] | 1185 | acpi_boot_table_init(); |
| 1186 | |
| 1187 | early_acpi_boot_init(); |
| 1188 | |
Bernhard Walle | 91467bd | 2008-07-18 19:07:53 +0200 | [diff] [blame] | 1189 | initmem_init(); |
Weijie Yang | 3c325f8 | 2014-10-24 17:00:34 +0800 | [diff] [blame] | 1190 | dma_contiguous_reserve(max_pfn_mapped << PAGE_SHIFT); |
Tang Chen | fa591c4 | 2013-11-12 15:08:07 -0800 | [diff] [blame] | 1191 | |
| 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 Costa | 790c73f | 2008-02-15 17:52:48 -0200 | [diff] [blame] | 1198 | memblock_find_dma_reserve(); |
| 1199 | |
| 1200 | #ifdef CONFIG_KVM_GUEST |
| 1201 | kvmclock_init(); |
Thomas Gleixner | 030cb6c | 2009-08-20 14:30:02 +0200 | [diff] [blame] | 1202 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1203 | |
Boris Ostrovsky | ccb6494 | 2017-09-11 14:51:11 -0400 | [diff] [blame] | 1204 | tsc_early_delay_calibrate(); |
| 1205 | if (!early_xdbc_setup_hardware()) |
| 1206 | early_xdbc_register_console(); |
| 1207 | |
Thomas Gleixner | 030cb6c | 2009-08-20 14:30:02 +0200 | [diff] [blame] | 1208 | x86_init.paging.pagetable_init(); |
Bernhard Kaindl | f212ec4 | 2008-01-30 13:34:11 +0100 | [diff] [blame] | 1209 | |
Andrey Ryabinin | ef7f0d6 | 2015-02-13 14:39:25 -0800 | [diff] [blame] | 1210 | kasan_init(); |
| 1211 | |
Andy Lutomirski | d2b6dc6 | 2017-05-08 17:09:10 -0700 | [diff] [blame] | 1212 | /* |
Thomas Gleixner | 945fd17 | 2018-02-28 21:14:26 +0100 | [diff] [blame] | 1213 | * Sync back kernel address range. |
| 1214 | * |
| 1215 | * FIXME: Can the later sync in setup_cpu_entry_areas() replace |
| 1216 | * this call? |
Andy Lutomirski | d2b6dc6 | 2017-05-08 17:09:10 -0700 | [diff] [blame] | 1217 | */ |
Thomas Gleixner | 945fd17 | 2018-02-28 21:14:26 +0100 | [diff] [blame] | 1218 | sync_initial_page_table(); |
Andy Lutomirski | d2b6dc6 | 2017-05-08 17:09:10 -0700 | [diff] [blame] | 1219 | |
Joseph Cihula | 3162534 | 2009-06-30 19:30:59 -0700 | [diff] [blame] | 1220 | tboot_probe(); |
| 1221 | |
Yinghai Lu | 76934ed | 2008-06-25 17:52:35 -0700 | [diff] [blame] | 1222 | map_vsyscall(); |
Yinghai Lu | 76934ed | 2008-06-25 17:52:35 -0700 | [diff] [blame] | 1223 | |
Rusty Russell | 1a3f239 | 2006-09-26 10:52:32 +0200 | [diff] [blame] | 1224 | generic_apic_probe(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1225 | |
Andi Kleen | 54ef340 | 2007-10-19 20:35:03 +0200 | [diff] [blame] | 1226 | early_quirks(); |
Andy Currid | d44647b | 2006-06-08 00:43:38 -0700 | [diff] [blame] | 1227 | |
Yinghai Lu | 295deae | 2008-06-23 19:55:05 -0700 | [diff] [blame] | 1228 | /* |
| 1229 | * Read APIC and some other early information from ACPI tables. |
| 1230 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1231 | acpi_boot_init(); |
Feng Tang | efafc8b | 2009-08-14 15:23:29 -0400 | [diff] [blame] | 1232 | sfi_init(); |
Thomas Gleixner | a906fda | 2011-02-25 16:09:31 +0100 | [diff] [blame] | 1233 | x86_dtb_init(); |
Feng Tang | efafc8b | 2009-08-14 15:23:29 -0400 | [diff] [blame] | 1234 | |
Yinghai Lu | 295deae | 2008-06-23 19:55:05 -0700 | [diff] [blame] | 1235 | /* |
| 1236 | * get boot-time SMP configuration: |
| 1237 | */ |
Baoquan He | a91bf71 | 2016-08-12 14:57:12 +0800 | [diff] [blame] | 1238 | get_smp_config(); |
Yinghai Lu | 76934ed | 2008-06-25 17:52:35 -0700 | [diff] [blame] | 1239 | |
Thomas Gleixner | 1e90a13 | 2016-10-29 13:42:42 +0200 | [diff] [blame] | 1240 | /* |
| 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 Lu | 329513a | 2008-07-02 18:54:40 -0700 | [diff] [blame] | 1246 | prefill_possible_map(); |
Yinghai Lu | 301e619 | 2008-08-19 20:50:02 -0700 | [diff] [blame] | 1247 | |
Yinghai Lu | 5f4765f | 2008-07-02 18:53:44 -0700 | [diff] [blame] | 1248 | init_cpu_to_node(); |
Yinghai Lu | 5f4765f | 2008-07-02 18:53:44 -0700 | [diff] [blame] | 1249 | |
Thomas Gleixner | ca1b886 | 2015-04-24 13:57:48 +0200 | [diff] [blame] | 1250 | io_apic_init_mappings(); |
Yinghai Lu | 9d6a4d0 | 2008-08-19 20:50:52 -0700 | [diff] [blame] | 1251 | |
Juergen Gross | f361464 | 2017-11-09 14:27:38 +0100 | [diff] [blame] | 1252 | x86_init.hyper.guest_late_init(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1253 | |
Ingo Molnar | 1506c8d | 2017-01-28 22:41:14 +0100 | [diff] [blame] | 1254 | e820__reserve_resources(); |
Ingo Molnar | 090d717 | 2017-01-28 22:44:12 +0100 | [diff] [blame] | 1255 | e820__register_nosave_regions(max_low_pfn); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1256 | |
Thomas Gleixner | 8fee697 | 2009-08-19 14:55:50 +0200 | [diff] [blame] | 1257 | x86_init.resources.reserve_resources(); |
Yinghai Lu | 41c094f | 2008-06-16 13:03:31 -0700 | [diff] [blame] | 1258 | |
Ingo Molnar | 2df908b | 2017-01-28 14:16:38 +0100 | [diff] [blame] | 1259 | e820__setup_pci_gap(); |
Yinghai Lu | 41c094f | 2008-06-16 13:03:31 -0700 | [diff] [blame] | 1260 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1261 | #ifdef CONFIG_VT |
| 1262 | #if defined(CONFIG_VGA_CONSOLE) |
Matt Fleming | 83e6818 | 2012-11-14 09:42:35 +0000 | [diff] [blame] | 1263 | if (!efi_enabled(EFI_BOOT) || (efi_mem_type(0xa0000) != EFI_CONVENTIONAL_MEMORY)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1264 | conswitchp = &vga_con; |
| 1265 | #elif defined(CONFIG_DUMMY_CONSOLE) |
| 1266 | conswitchp = &dummy_con; |
| 1267 | #endif |
| 1268 | #endif |
Thomas Gleixner | 6f30c1a | 2009-08-20 13:19:57 +0200 | [diff] [blame] | 1269 | x86_init.oem.banner(); |
Yong Wang | a2202aa | 2009-11-10 09:38:24 +0800 | [diff] [blame] | 1270 | |
Feng Tang | 6b617e2 | 2011-02-15 00:13:31 +0800 | [diff] [blame] | 1271 | x86_init.timers.wallclock_init(); |
| 1272 | |
Yong Wang | a2202aa | 2009-11-10 09:38:24 +0800 | [diff] [blame] | 1273 | mcheck_init(); |
Jason Baron | f49aa44 | 2010-09-17 11:08:51 -0400 | [diff] [blame] | 1274 | |
H. Peter Anvin | dc326fc | 2011-04-18 15:19:51 -0700 | [diff] [blame] | 1275 | arch_init_ideal_nops(); |
John Stultz | b3c869d | 2012-09-04 12:42:27 -0400 | [diff] [blame] | 1276 | |
| 1277 | register_refined_jiffies(CLOCK_TICK_RATE); |
Olof Johansson | 5189c2a | 2012-10-24 10:00:44 -0700 | [diff] [blame] | 1278 | |
| 1279 | #ifdef CONFIG_EFI |
Borislav Petkov | a5d90c9 | 2014-03-04 17:02:17 +0100 | [diff] [blame] | 1280 | if (efi_enabled(EFI_BOOT)) |
| 1281 | efi_apply_memmap_quirks(); |
Olof Johansson | 5189c2a | 2012-10-24 10:00:44 -0700 | [diff] [blame] | 1282 | #endif |
Josh Poimboeuf | ee9f8fc | 2017-07-24 18:36:57 -0500 | [diff] [blame] | 1283 | |
| 1284 | unwind_init(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1285 | } |
Ingo Molnar | 5649b7c | 2008-09-16 09:29:09 +0200 | [diff] [blame] | 1286 | |
Ingo Molnar | 9be1b56 | 2009-02-17 23:12:48 +0100 | [diff] [blame] | 1287 | #ifdef CONFIG_X86_32 |
Ingo Molnar | 5649b7c | 2008-09-16 09:29:09 +0200 | [diff] [blame] | 1288 | |
Thomas Gleixner | 8fee697 | 2009-08-19 14:55:50 +0200 | [diff] [blame] | 1289 | static struct resource video_ram_resource = { |
| 1290 | .name = "Video RAM area", |
| 1291 | .start = 0xa0000, |
| 1292 | .end = 0xbffff, |
| 1293 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM |
Ingo Molnar | 9be1b56 | 2009-02-17 23:12:48 +0100 | [diff] [blame] | 1294 | }; |
| 1295 | |
Thomas Gleixner | 8fee697 | 2009-08-19 14:55:50 +0200 | [diff] [blame] | 1296 | void __init i386_reserve_resources(void) |
Ingo Molnar | 9be1b56 | 2009-02-17 23:12:48 +0100 | [diff] [blame] | 1297 | { |
Thomas Gleixner | 8fee697 | 2009-08-19 14:55:50 +0200 | [diff] [blame] | 1298 | request_resource(&iomem_resource, &video_ram_resource); |
| 1299 | reserve_standard_io_resources(); |
Ingo Molnar | 9be1b56 | 2009-02-17 23:12:48 +0100 | [diff] [blame] | 1300 | } |
| 1301 | |
Ingo Molnar | 9be1b56 | 2009-02-17 23:12:48 +0100 | [diff] [blame] | 1302 | #endif /* CONFIG_X86_32 */ |
Kees Cook | f32360e | 2013-10-10 17:18:17 -0700 | [diff] [blame] | 1303 | |
| 1304 | static struct notifier_block kernel_offset_notifier = { |
| 1305 | .notifier_call = dump_kernel_offset |
| 1306 | }; |
| 1307 | |
| 1308 | static 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 Hansen | c1192f8 | 2016-02-12 13:02:27 -0800 | [diff] [blame] | 1315 | |
| 1316 | void 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 | } |