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Commit | Line | Data |
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1da177e4 | 1 | /* |
1da177e4 LT |
2 | * Copyright (C) 1995 Linus Torvalds |
3 | * | |
4 | * Support of BIGMEM added by Gerhard Wichert, Siemens AG, July 1999 | |
5 | * | |
6 | * Memory region support | |
7 | * David Parsons <orc@pell.chi.il.us>, July-August 1999 | |
8 | * | |
9 | * Added E820 sanitization routine (removes overlapping memory regions); | |
10 | * Brian Moyle <bmoyle@mvista.com>, February 2001 | |
11 | * | |
12 | * Moved CPU detection code to cpu/${cpu}.c | |
13 | * Patrick Mochel <mochel@osdl.org>, March 2002 | |
14 | * | |
15 | * Provisions for empty E820 memory regions (reported by certain BIOSes). | |
16 | * Alex Achenbach <xela@slit.de>, December 2002. | |
17 | * | |
18 | */ | |
19 | ||
20 | /* | |
21 | * This file handles the architecture-dependent parts of initialization | |
22 | */ | |
23 | ||
24 | #include <linux/sched.h> | |
25 | #include <linux/mm.h> | |
05b79bdc | 26 | #include <linux/mmzone.h> |
894673ee | 27 | #include <linux/screen_info.h> |
1da177e4 LT |
28 | #include <linux/ioport.h> |
29 | #include <linux/acpi.h> | |
efafc8b2 | 30 | #include <linux/sfi.h> |
1da177e4 LT |
31 | #include <linux/apm_bios.h> |
32 | #include <linux/initrd.h> | |
33 | #include <linux/bootmem.h> | |
72d7c3b3 | 34 | #include <linux/memblock.h> |
1da177e4 LT |
35 | #include <linux/seq_file.h> |
36 | #include <linux/console.h> | |
1da177e4 LT |
37 | #include <linux/root_dev.h> |
38 | #include <linux/highmem.h> | |
186f4360 | 39 | #include <linux/export.h> |
1da177e4 LT |
40 | #include <linux/efi.h> |
41 | #include <linux/init.h> | |
42 | #include <linux/edd.h> | |
138fe4e0 | 43 | #include <linux/iscsi_ibft.h> |
1da177e4 | 44 | #include <linux/nodemask.h> |
1bc3b91a | 45 | #include <linux/kexec.h> |
e9928674 | 46 | #include <linux/dmi.h> |
22a9835c | 47 | #include <linux/pfn.h> |
376ff035 | 48 | #include <linux/pci.h> |
46d671b5 | 49 | #include <asm/pci-direct.h> |
f212ec4b | 50 | #include <linux/init_ohci1394_dma.h> |
790c73f6 | 51 | #include <linux/kvm_para.h> |
0a2b9a6e | 52 | #include <linux/dma-contiguous.h> |
1bc3b91a | 53 | |
46d671b5 YL |
54 | #include <linux/errno.h> |
55 | #include <linux/kernel.h> | |
56 | #include <linux/stddef.h> | |
57 | #include <linux/unistd.h> | |
58 | #include <linux/ptrace.h> | |
46d671b5 YL |
59 | #include <linux/user.h> |
60 | #include <linux/delay.h> | |
46d671b5 YL |
61 | |
62 | #include <linux/kallsyms.h> | |
46d671b5 YL |
63 | #include <linux/cpufreq.h> |
64 | #include <linux/dma-mapping.h> | |
65 | #include <linux/ctype.h> | |
66 | #include <linux/uaccess.h> | |
67 | ||
68 | #include <linux/percpu.h> | |
69 | #include <linux/crash_dump.h> | |
69575d38 | 70 | #include <linux/tboot.h> |
b3c869d3 | 71 | #include <linux/jiffies.h> |
b9d05200 | 72 | #include <linux/mem_encrypt.h> |
46d671b5 | 73 | |
1b5aeebf | 74 | #include <linux/usb/xhci-dbgp.h> |
1da177e4 | 75 | #include <video/edid.h> |
1bc3b91a | 76 | |
093af8d7 | 77 | #include <asm/mtrr.h> |
9635b47d | 78 | #include <asm/apic.h> |
084ee1c6 | 79 | #include <asm/realmode.h> |
66441bd3 | 80 | #include <asm/e820/api.h> |
1da177e4 LT |
81 | #include <asm/mpspec.h> |
82 | #include <asm/setup.h> | |
55f26239 | 83 | #include <asm/efi.h> |
8e6dafd6 IM |
84 | #include <asm/timer.h> |
85 | #include <asm/i8259.h> | |
1da177e4 LT |
86 | #include <asm/sections.h> |
87 | #include <asm/io_apic.h> | |
88 | #include <asm/ist.h> | |
1164dd00 | 89 | #include <asm/setup_arch.h> |
ce3fe6b2 | 90 | #include <asm/bios_ebda.h> |
00bf4098 | 91 | #include <asm/cacheflush.h> |
2fde61fd | 92 | #include <asm/processor.h> |
cc9f7a0c | 93 | #include <asm/bugs.h> |
ef7f0d6a | 94 | #include <asm/kasan.h> |
1da177e4 | 95 | |
46d671b5 | 96 | #include <asm/vsyscall.h> |
6e5385d4 | 97 | #include <asm/cpu.h> |
46d671b5 YL |
98 | #include <asm/desc.h> |
99 | #include <asm/dma.h> | |
46a7fa27 | 100 | #include <asm/iommu.h> |
1d9b16d1 | 101 | #include <asm/gart.h> |
46d671b5 YL |
102 | #include <asm/mmu_context.h> |
103 | #include <asm/proto.h> | |
104 | ||
46d671b5 | 105 | #include <asm/paravirt.h> |
88b094fb | 106 | #include <asm/hypervisor.h> |
fd699c76 | 107 | #include <asm/olpc_ofw.h> |
46d671b5 YL |
108 | |
109 | #include <asm/percpu.h> | |
46d671b5 YL |
110 | #include <asm/topology.h> |
111 | #include <asm/apicdef.h> | |
23ac4ae8 | 112 | #include <asm/amd_nb.h> |
a2202aa2 | 113 | #include <asm/mce.h> |
f49aa448 | 114 | #include <asm/alternative.h> |
da6b737b | 115 | #include <asm/prom.h> |
9a2bc335 | 116 | #include <asm/microcode.h> |
c1192f84 | 117 | #include <asm/mmu_context.h> |
0483e1fa | 118 | #include <asm/kaslr.h> |
ee9f8fce | 119 | #include <asm/unwind.h> |
46d671b5 | 120 | |
2b72394e | 121 | /* |
66520ebc JS |
122 | * max_low_pfn_mapped: highest direct mapped pfn under 4GB |
123 | * max_pfn_mapped: highest direct mapped pfn over 4GB | |
124 | * | |
09821ff1 | 125 | * The direct mapping only covers E820_TYPE_RAM regions, so the ranges and gaps are |
66520ebc | 126 | * represented by pfn_mapped |
2b72394e PE |
127 | */ |
128 | unsigned long max_low_pfn_mapped; | |
129 | unsigned long max_pfn_mapped; | |
130 | ||
e808bae2 | 131 | #ifdef CONFIG_DMI |
796216a5 | 132 | RESERVE_BRK(dmi_alloc, 65536); |
e808bae2 | 133 | #endif |
796216a5 | 134 | |
c0b5842a | 135 | |
93dbda7c JF |
136 | static __initdata unsigned long _brk_start = (unsigned long)__brk_base; |
137 | unsigned long _brk_end = (unsigned long)__brk_base; | |
138 | ||
217b8ce8 | 139 | struct boot_params boot_params; |
217b8ce8 | 140 | |
4046d6e8 LT |
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 | ||
7dea23ec | 166 | #ifdef CONFIG_X86_32 |
6415813b MK |
167 | /* cpu data as detected by the assembly code in head_32.S */ |
168 | struct cpuinfo_x86 new_cpu_data; | |
169 | ||
1da177e4 | 170 | /* common cpu data for all cpus */ |
6415813b | 171 | struct cpuinfo_x86 boot_cpu_data __read_mostly; |
129f6946 | 172 | EXPORT_SYMBOL(boot_cpu_data); |
1da177e4 | 173 | |
0c254e38 AS |
174 | unsigned int def_to_bigsmp; |
175 | ||
1da177e4 LT |
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; | |
1da177e4 | 180 | |
7dea23ec YL |
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 | |
ed26dbe5 JF |
193 | struct cpuinfo_x86 boot_cpu_data __read_mostly = { |
194 | .x86_phys_bits = MAX_PHYSMEM_BITS, | |
195 | }; | |
7dea23ec YL |
196 | EXPORT_SYMBOL(boot_cpu_data); |
197 | #endif | |
198 | ||
199 | ||
200 | #if !defined(CONFIG_X86_PAE) || defined(CONFIG_X86_64) | |
404f6aac | 201 | __visible unsigned long mmu_cr4_features __ro_after_init; |
7dea23ec | 202 | #else |
404f6aac | 203 | __visible unsigned long mmu_cr4_features __ro_after_init = X86_CR4_PAE; |
7dea23ec YL |
204 | #endif |
205 | ||
5031296c PA |
206 | /* Boot loader ID and version as integers, for the benefit of proc_dointvec */ |
207 | int bootloader_type, bootloader_version; | |
1da177e4 | 208 | |
1da177e4 LT |
209 | /* |
210 | * Setup options | |
211 | */ | |
1da177e4 | 212 | struct screen_info screen_info; |
129f6946 | 213 | EXPORT_SYMBOL(screen_info); |
1da177e4 | 214 | struct edid_info edid_info; |
5e518d76 | 215 | EXPORT_SYMBOL_GPL(edid_info); |
1da177e4 | 216 | |
1da177e4 LT |
217 | extern int root_mountflags; |
218 | ||
e44b7b75 | 219 | unsigned long saved_video_mode; |
1da177e4 | 220 | |
cf8fa920 | 221 | #define RAMDISK_IMAGE_START_MASK 0x07FF |
1da177e4 | 222 | #define RAMDISK_PROMPT_FLAG 0x8000 |
cf8fa920 | 223 | #define RAMDISK_LOAD_FLAG 0x4000 |
1da177e4 | 224 | |
4e498b66 | 225 | static char __initdata command_line[COMMAND_LINE_SIZE]; |
516cbf37 TB |
226 | #ifdef CONFIG_CMDLINE_BOOL |
227 | static char __initdata builtin_cmdline[COMMAND_LINE_SIZE] = CONFIG_CMDLINE; | |
228 | #endif | |
1da177e4 | 229 | |
1da177e4 LT |
230 | #if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE) |
231 | struct edd edd; | |
232 | #ifdef CONFIG_EDD_MODULE | |
233 | EXPORT_SYMBOL(edd); | |
234 | #endif | |
235 | /** | |
236 | * copy_edd() - Copy the BIOS EDD information | |
237 | * from boot_params into a safe place. | |
238 | * | |
239 | */ | |
9eaa192d | 240 | static inline void __init copy_edd(void) |
1da177e4 | 241 | { |
30c82645 PA |
242 | memcpy(edd.mbr_signature, boot_params.edd_mbr_sig_buffer, |
243 | sizeof(edd.mbr_signature)); | |
244 | memcpy(edd.edd_info, boot_params.eddbuf, sizeof(edd.edd_info)); | |
245 | edd.mbr_signature_nr = boot_params.edd_mbr_sig_buf_entries; | |
246 | edd.edd_info_nr = boot_params.eddbuf_entries; | |
1da177e4 LT |
247 | } |
248 | #else | |
9eaa192d | 249 | static inline void __init copy_edd(void) |
1da177e4 LT |
250 | { |
251 | } | |
252 | #endif | |
253 | ||
5368a2be PA |
254 | void * __init extend_brk(size_t size, size_t align) |
255 | { | |
256 | size_t mask = align - 1; | |
257 | void *ret; | |
258 | ||
259 | BUG_ON(_brk_start == 0); | |
260 | BUG_ON(align & mask); | |
261 | ||
262 | _brk_end = (_brk_end + mask) & ~mask; | |
263 | BUG_ON((char *)(_brk_end + size) > __brk_limit); | |
264 | ||
265 | ret = (void *)_brk_end; | |
266 | _brk_end += size; | |
267 | ||
268 | memset(ret, 0, size); | |
269 | ||
270 | return ret; | |
271 | } | |
272 | ||
148b2098 | 273 | #ifdef CONFIG_X86_32 |
e5f15b45 | 274 | static void __init cleanup_highmap(void) |
f005fe12 YL |
275 | { |
276 | } | |
854c879f PE |
277 | #endif |
278 | ||
5368a2be PA |
279 | static void __init reserve_brk(void) |
280 | { | |
281 | if (_brk_end > _brk_start) | |
fc8d7826 AD |
282 | memblock_reserve(__pa_symbol(_brk_start), |
283 | _brk_end - _brk_start); | |
5368a2be PA |
284 | |
285 | /* Mark brk area as locked down and no longer taking any | |
286 | new allocations */ | |
287 | _brk_start = 0; | |
288 | } | |
289 | ||
5aa3d718 BP |
290 | u64 relocated_ramdisk; |
291 | ||
cf8fa920 PA |
292 | #ifdef CONFIG_BLK_DEV_INITRD |
293 | ||
a8a51a88 YL |
294 | static u64 __init get_ramdisk_image(void) |
295 | { | |
296 | u64 ramdisk_image = boot_params.hdr.ramdisk_image; | |
297 | ||
ee92d815 YL |
298 | ramdisk_image |= (u64)boot_params.ext_ramdisk_image << 32; |
299 | ||
a8a51a88 YL |
300 | return ramdisk_image; |
301 | } | |
302 | static u64 __init get_ramdisk_size(void) | |
303 | { | |
304 | u64 ramdisk_size = boot_params.hdr.ramdisk_size; | |
305 | ||
ee92d815 YL |
306 | ramdisk_size |= (u64)boot_params.ext_ramdisk_size << 32; |
307 | ||
a8a51a88 YL |
308 | return ramdisk_size; |
309 | } | |
310 | ||
eb1379cb | 311 | static void __init relocate_initrd(void) |
cf8fa920 | 312 | { |
c967da6a | 313 | /* Assume only end is not page aligned */ |
a8a51a88 YL |
314 | u64 ramdisk_image = get_ramdisk_image(); |
315 | u64 ramdisk_size = get_ramdisk_size(); | |
c967da6a | 316 | u64 area_size = PAGE_ALIGN(ramdisk_size); |
cf8fa920 | 317 | |
e8c57d40 | 318 | /* We need to move the initrd down into directly mapped mem */ |
5aa3d718 BP |
319 | relocated_ramdisk = memblock_find_in_range(0, PFN_PHYS(max_pfn_mapped), |
320 | area_size, PAGE_SIZE); | |
cf8fa920 | 321 | |
5aa3d718 | 322 | if (!relocated_ramdisk) |
3945e2c9 | 323 | panic("Cannot find place for new RAMDISK of size %lld\n", |
5aa3d718 | 324 | ramdisk_size); |
3945e2c9 | 325 | |
e8c57d40 | 326 | /* Note: this includes all the mem currently occupied by |
cf8fa920 | 327 | the initrd, we rely on that fact to keep the data intact. */ |
5aa3d718 BP |
328 | memblock_reserve(relocated_ramdisk, area_size); |
329 | initrd_start = relocated_ramdisk + PAGE_OFFSET; | |
cf8fa920 | 330 | initrd_end = initrd_start + ramdisk_size; |
365811d6 | 331 | printk(KERN_INFO "Allocated new RAMDISK: [mem %#010llx-%#010llx]\n", |
5aa3d718 | 332 | relocated_ramdisk, relocated_ramdisk + ramdisk_size - 1); |
cf8fa920 | 333 | |
5dd2c4bd MS |
334 | copy_from_early_mem((void *)initrd_start, ramdisk_image, ramdisk_size); |
335 | ||
365811d6 BH |
336 | printk(KERN_INFO "Move RAMDISK from [mem %#010llx-%#010llx] to" |
337 | " [mem %#010llx-%#010llx]\n", | |
ba5b14cc | 338 | ramdisk_image, ramdisk_image + ramdisk_size - 1, |
5aa3d718 | 339 | relocated_ramdisk, relocated_ramdisk + ramdisk_size - 1); |
eb1379cb | 340 | } |
9a27f5c5 | 341 | |
1b8c78be YL |
342 | static void __init early_reserve_initrd(void) |
343 | { | |
344 | /* Assume only end is not page aligned */ | |
a8a51a88 YL |
345 | u64 ramdisk_image = get_ramdisk_image(); |
346 | u64 ramdisk_size = get_ramdisk_size(); | |
1b8c78be YL |
347 | u64 ramdisk_end = PAGE_ALIGN(ramdisk_image + ramdisk_size); |
348 | ||
349 | if (!boot_params.hdr.type_of_loader || | |
350 | !ramdisk_image || !ramdisk_size) | |
351 | return; /* No initrd provided by bootloader */ | |
352 | ||
353 | memblock_reserve(ramdisk_image, ramdisk_end - ramdisk_image); | |
354 | } | |
eb1379cb YL |
355 | static void __init reserve_initrd(void) |
356 | { | |
c967da6a | 357 | /* Assume only end is not page aligned */ |
a8a51a88 YL |
358 | u64 ramdisk_image = get_ramdisk_image(); |
359 | u64 ramdisk_size = get_ramdisk_size(); | |
c967da6a | 360 | u64 ramdisk_end = PAGE_ALIGN(ramdisk_image + ramdisk_size); |
e8c57d40 | 361 | u64 mapped_size; |
eb1379cb YL |
362 | |
363 | if (!boot_params.hdr.type_of_loader || | |
364 | !ramdisk_image || !ramdisk_size) | |
365 | return; /* No initrd provided by bootloader */ | |
366 | ||
367 | initrd_start = 0; | |
368 | ||
595ad9af | 369 | mapped_size = memblock_mem_size(max_pfn_mapped); |
e8c57d40 | 370 | if (ramdisk_size >= (mapped_size>>1)) |
ab7b64e9 PJ |
371 | panic("initrd too large to handle, " |
372 | "disabling initrd (%lld needed, %lld available)\n", | |
e8c57d40 | 373 | ramdisk_size, mapped_size>>1); |
eb1379cb | 374 | |
365811d6 BH |
375 | printk(KERN_INFO "RAMDISK: [mem %#010llx-%#010llx]\n", ramdisk_image, |
376 | ramdisk_end - 1); | |
eb1379cb | 377 | |
74f27655 | 378 | if (pfn_range_is_mapped(PFN_DOWN(ramdisk_image), |
e8c57d40 YL |
379 | PFN_DOWN(ramdisk_end))) { |
380 | /* All are mapped, easy case */ | |
eb1379cb YL |
381 | initrd_start = ramdisk_image + PAGE_OFFSET; |
382 | initrd_end = initrd_start + ramdisk_size; | |
383 | return; | |
384 | } | |
385 | ||
eb1379cb | 386 | relocate_initrd(); |
8c5dd8f4 | 387 | |
24aa0788 | 388 | memblock_free(ramdisk_image, ramdisk_end - ramdisk_image); |
cf8fa920 | 389 | } |
af06f8b7 | 390 | |
225c37d7 | 391 | #else |
1b8c78be YL |
392 | static void __init early_reserve_initrd(void) |
393 | { | |
394 | } | |
eb1379cb | 395 | static void __init reserve_initrd(void) |
225c37d7 YL |
396 | { |
397 | } | |
cf8fa920 PA |
398 | #endif /* CONFIG_BLK_DEV_INITRD */ |
399 | ||
29f784e3 | 400 | static void __init parse_setup_data(void) |
257b0fde YL |
401 | { |
402 | struct setup_data *data; | |
30e46b57 | 403 | u64 pa_data, pa_next; |
257b0fde | 404 | |
257b0fde YL |
405 | pa_data = boot_params.hdr.setup_data; |
406 | while (pa_data) { | |
7389882c | 407 | u32 data_len, data_type; |
f1c2b357 | 408 | |
7389882c | 409 | data = early_memremap(pa_data, sizeof(*data)); |
f1c2b357 | 410 | data_len = data->len + sizeof(struct setup_data); |
30e46b57 LC |
411 | data_type = data->type; |
412 | pa_next = data->next; | |
8d4a40bc | 413 | early_memunmap(data, sizeof(*data)); |
f1c2b357 | 414 | |
30e46b57 | 415 | switch (data_type) { |
257b0fde | 416 | case SETUP_E820_EXT: |
914053c0 | 417 | e820__memory_setup_extended(pa_data, data_len); |
257b0fde | 418 | break; |
da6b737b SAS |
419 | case SETUP_DTB: |
420 | add_dtb(pa_data); | |
257b0fde | 421 | break; |
1fec0533 DY |
422 | case SETUP_EFI: |
423 | parse_efi_setup(pa_data, data_len); | |
424 | break; | |
257b0fde YL |
425 | default: |
426 | break; | |
427 | } | |
30e46b57 | 428 | pa_data = pa_next; |
257b0fde YL |
429 | } |
430 | } | |
431 | ||
a9ce6bc1 | 432 | static void __init memblock_x86_reserve_range_setup_data(void) |
a0a0becd YL |
433 | { |
434 | struct setup_data *data; | |
435 | u64 pa_data; | |
a0a0becd | 436 | |
a0a0becd YL |
437 | pa_data = boot_params.hdr.setup_data; |
438 | while (pa_data) { | |
88b4c146 | 439 | data = early_memremap(pa_data, sizeof(*data)); |
24aa0788 | 440 | memblock_reserve(pa_data, sizeof(*data) + data->len); |
a0a0becd | 441 | pa_data = data->next; |
8d4a40bc | 442 | early_memunmap(data, sizeof(*data)); |
a0a0becd YL |
443 | } |
444 | } | |
445 | ||
ccb4defa YL |
446 | /* |
447 | * --------- Crashkernel reservation ------------------------------ | |
448 | */ | |
449 | ||
2965faa5 | 450 | #ifdef CONFIG_KEXEC_CORE |
32105f7f | 451 | |
606134f7 BP |
452 | /* 16M alignment for crash kernel regions */ |
453 | #define CRASH_ALIGN (16 << 20) | |
454 | ||
7f8595bf PA |
455 | /* |
456 | * Keep the crash kernel below this limit. On 32 bits earlier kernels | |
457 | * would limit the kernel to the low 512 MiB due to mapping restrictions. | |
55a20ee7 | 458 | * On 64bit, old kexec-tools need to under 896MiB. |
7f8595bf PA |
459 | */ |
460 | #ifdef CONFIG_X86_32 | |
97eac21b BP |
461 | # define CRASH_ADDR_LOW_MAX (512 << 20) |
462 | # define CRASH_ADDR_HIGH_MAX (512 << 20) | |
7f8595bf | 463 | #else |
97eac21b BP |
464 | # define CRASH_ADDR_LOW_MAX (896UL << 20) |
465 | # define CRASH_ADDR_HIGH_MAX MAXMEM | |
7f8595bf PA |
466 | #endif |
467 | ||
eb6db83d | 468 | static int __init reserve_crashkernel_low(void) |
0212f915 YL |
469 | { |
470 | #ifdef CONFIG_X86_64 | |
f56d5578 | 471 | unsigned long long base, low_base = 0, low_size = 0; |
0212f915 | 472 | unsigned long total_low_mem; |
0212f915 YL |
473 | int ret; |
474 | ||
97eac21b BP |
475 | total_low_mem = memblock_mem_size(1UL << (32 - PAGE_SHIFT)); |
476 | ||
adbc742b | 477 | /* crashkernel=Y,low */ |
97eac21b | 478 | ret = parse_crashkernel_low(boot_command_line, total_low_mem, &low_size, &base); |
f56d5578 | 479 | if (ret) { |
c729de8f YL |
480 | /* |
481 | * two parts from lib/swiotlb.c: | |
94fb9334 JR |
482 | * -swiotlb size: user-specified with swiotlb= or default. |
483 | * | |
484 | * -swiotlb overflow buffer: now hardcoded to 32k. We round it | |
485 | * to 8M for other buffers that may need to stay low too. Also | |
486 | * make sure we allocate enough extra low memory so that we | |
487 | * don't run out of DMA buffers for 32-bit devices. | |
c729de8f | 488 | */ |
97eac21b | 489 | low_size = max(swiotlb_size_or_default() + (8UL << 20), 256UL << 20); |
c729de8f | 490 | } else { |
adbc742b | 491 | /* passed with crashkernel=0,low ? */ |
c729de8f | 492 | if (!low_size) |
eb6db83d | 493 | return 0; |
c729de8f | 494 | } |
0212f915 | 495 | |
fe2d48b8 | 496 | low_base = memblock_find_in_range(0, 1ULL << 32, low_size, CRASH_ALIGN); |
0212f915 | 497 | if (!low_base) { |
eb6db83d BH |
498 | pr_err("Cannot reserve %ldMB crashkernel low memory, please try smaller size.\n", |
499 | (unsigned long)(low_size >> 20)); | |
500 | return -ENOMEM; | |
0212f915 | 501 | } |
0212f915 | 502 | |
6f376057 BP |
503 | ret = memblock_reserve(low_base, low_size); |
504 | if (ret) { | |
505 | pr_err("%s: Error reserving crashkernel low memblock.\n", __func__); | |
506 | return ret; | |
0212f915 YL |
507 | } |
508 | ||
0212f915 | 509 | pr_info("Reserving %ldMB of low memory at %ldMB for crashkernel (System low RAM: %ldMB)\n", |
97eac21b BP |
510 | (unsigned long)(low_size >> 20), |
511 | (unsigned long)(low_base >> 20), | |
512 | (unsigned long)(total_low_mem >> 20)); | |
513 | ||
0212f915 YL |
514 | crashk_low_res.start = low_base; |
515 | crashk_low_res.end = low_base + low_size - 1; | |
516 | insert_resource(&iomem_resource, &crashk_low_res); | |
7f8595bf | 517 | #endif |
eb6db83d | 518 | return 0; |
0212f915 | 519 | } |
7f8595bf | 520 | |
29f784e3 | 521 | static void __init reserve_crashkernel(void) |
ccb4defa | 522 | { |
f56d5578 | 523 | unsigned long long crash_size, crash_base, total_mem; |
55a20ee7 | 524 | bool high = false; |
ccb4defa YL |
525 | int ret; |
526 | ||
09c71bfd | 527 | total_mem = memblock_phys_mem_size(); |
ccb4defa | 528 | |
55a20ee7 | 529 | /* crashkernel=XM */ |
97eac21b | 530 | ret = parse_crashkernel(boot_command_line, total_mem, &crash_size, &crash_base); |
55a20ee7 | 531 | if (ret != 0 || crash_size <= 0) { |
adbc742b | 532 | /* crashkernel=X,high */ |
55a20ee7 | 533 | ret = parse_crashkernel_high(boot_command_line, total_mem, |
97eac21b | 534 | &crash_size, &crash_base); |
55a20ee7 YL |
535 | if (ret != 0 || crash_size <= 0) |
536 | return; | |
537 | high = true; | |
538 | } | |
32105f7f BW |
539 | |
540 | /* 0 means: find the address automatically */ | |
541 | if (crash_base <= 0) { | |
9f4c1396 | 542 | /* |
a8d4c824 XP |
543 | * Set CRASH_ADDR_LOW_MAX upper bound for crash memory, |
544 | * as old kexec-tools loads bzImage below that, unless | |
545 | * "crashkernel=size[KMG],high" is specified. | |
9f4c1396 | 546 | */ |
606134f7 | 547 | crash_base = memblock_find_in_range(CRASH_ALIGN, |
97eac21b BP |
548 | high ? CRASH_ADDR_HIGH_MAX |
549 | : CRASH_ADDR_LOW_MAX, | |
606134f7 | 550 | crash_size, CRASH_ALIGN); |
1f5026a7 | 551 | if (!crash_base) { |
44280733 | 552 | pr_info("crashkernel reservation failed - No suitable area found.\n"); |
ccb4defa YL |
553 | return; |
554 | } | |
0212f915 | 555 | |
32105f7f | 556 | } else { |
44280733 YL |
557 | unsigned long long start; |
558 | ||
9f4c1396 | 559 | start = memblock_find_in_range(crash_base, |
97eac21b BP |
560 | crash_base + crash_size, |
561 | crash_size, 1 << 20); | |
44280733 YL |
562 | if (start != crash_base) { |
563 | pr_info("crashkernel reservation failed - memory is in use.\n"); | |
ccb4defa YL |
564 | return; |
565 | } | |
32105f7f | 566 | } |
6f376057 BP |
567 | ret = memblock_reserve(crash_base, crash_size); |
568 | if (ret) { | |
569 | pr_err("%s: Error reserving crashkernel memblock.\n", __func__); | |
570 | return; | |
571 | } | |
ccb4defa | 572 | |
eb6db83d BH |
573 | if (crash_base >= (1ULL << 32) && reserve_crashkernel_low()) { |
574 | memblock_free(crash_base, crash_size); | |
575 | return; | |
576 | } | |
ccb4defa | 577 | |
f56d5578 BP |
578 | pr_info("Reserving %ldMB of memory at %ldMB for crashkernel (System RAM: %ldMB)\n", |
579 | (unsigned long)(crash_size >> 20), | |
580 | (unsigned long)(crash_base >> 20), | |
581 | (unsigned long)(total_mem >> 20)); | |
ccb4defa | 582 | |
32105f7f BW |
583 | crashk_res.start = crash_base; |
584 | crashk_res.end = crash_base + crash_size - 1; | |
585 | insert_resource(&iomem_resource, &crashk_res); | |
ccb4defa YL |
586 | } |
587 | #else | |
29f784e3 | 588 | static void __init reserve_crashkernel(void) |
ccb4defa YL |
589 | { |
590 | } | |
591 | #endif | |
592 | ||
bdba0e70 YL |
593 | static struct resource standard_io_resources[] = { |
594 | { .name = "dma1", .start = 0x00, .end = 0x1f, | |
595 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
596 | { .name = "pic1", .start = 0x20, .end = 0x21, | |
597 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
598 | { .name = "timer0", .start = 0x40, .end = 0x43, | |
599 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
600 | { .name = "timer1", .start = 0x50, .end = 0x53, | |
601 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
602 | { .name = "keyboard", .start = 0x60, .end = 0x60, | |
603 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
604 | { .name = "keyboard", .start = 0x64, .end = 0x64, | |
605 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
606 | { .name = "dma page reg", .start = 0x80, .end = 0x8f, | |
607 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
608 | { .name = "pic2", .start = 0xa0, .end = 0xa1, | |
609 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
610 | { .name = "dma2", .start = 0xc0, .end = 0xdf, | |
611 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
612 | { .name = "fpu", .start = 0xf0, .end = 0xff, | |
613 | .flags = IORESOURCE_BUSY | IORESOURCE_IO } | |
614 | }; | |
615 | ||
8fee697d | 616 | void __init reserve_standard_io_resources(void) |
bdba0e70 YL |
617 | { |
618 | int i; | |
619 | ||
620 | /* request I/O space for devices used on all i[345]86 PCs */ | |
621 | for (i = 0; i < ARRAY_SIZE(standard_io_resources); i++) | |
622 | request_resource(&ioport_resource, &standard_io_resources[i]); | |
623 | ||
624 | } | |
625 | ||
042be38e YL |
626 | static __init void reserve_ibft_region(void) |
627 | { | |
628 | unsigned long addr, size = 0; | |
629 | ||
630 | addr = find_ibft_region(&size); | |
631 | ||
632 | if (size) | |
24aa0788 | 633 | memblock_reserve(addr, size); |
042be38e YL |
634 | } |
635 | ||
a9acc536 JB |
636 | static bool __init snb_gfx_workaround_needed(void) |
637 | { | |
e43b3cec | 638 | #ifdef CONFIG_PCI |
a9acc536 JB |
639 | int i; |
640 | u16 vendor, devid; | |
ab3cd867 | 641 | static const __initconst u16 snb_ids[] = { |
a9acc536 JB |
642 | 0x0102, |
643 | 0x0112, | |
644 | 0x0122, | |
645 | 0x0106, | |
646 | 0x0116, | |
647 | 0x0126, | |
648 | 0x010a, | |
649 | }; | |
650 | ||
651 | /* Assume no if something weird is going on with PCI */ | |
652 | if (!early_pci_allowed()) | |
653 | return false; | |
654 | ||
655 | vendor = read_pci_config_16(0, 2, 0, PCI_VENDOR_ID); | |
656 | if (vendor != 0x8086) | |
657 | return false; | |
658 | ||
659 | devid = read_pci_config_16(0, 2, 0, PCI_DEVICE_ID); | |
660 | for (i = 0; i < ARRAY_SIZE(snb_ids); i++) | |
661 | if (devid == snb_ids[i]) | |
662 | return true; | |
e43b3cec | 663 | #endif |
a9acc536 JB |
664 | |
665 | return false; | |
666 | } | |
667 | ||
668 | /* | |
669 | * Sandy Bridge graphics has trouble with certain ranges, exclude | |
670 | * them from allocation. | |
671 | */ | |
672 | static void __init trim_snb_memory(void) | |
673 | { | |
ab3cd867 | 674 | static const __initconst unsigned long bad_pages[] = { |
a9acc536 JB |
675 | 0x20050000, |
676 | 0x20110000, | |
677 | 0x20130000, | |
678 | 0x20138000, | |
679 | 0x40004000, | |
680 | }; | |
681 | int i; | |
682 | ||
683 | if (!snb_gfx_workaround_needed()) | |
684 | return; | |
685 | ||
686 | printk(KERN_DEBUG "reserving inaccessible SNB gfx pages\n"); | |
687 | ||
688 | /* | |
689 | * Reserve all memory below the 1 MB mark that has not | |
690 | * already been reserved. | |
691 | */ | |
692 | memblock_reserve(0, 1<<20); | |
693 | ||
694 | for (i = 0; i < ARRAY_SIZE(bad_pages); i++) { | |
695 | if (memblock_reserve(bad_pages[i], PAGE_SIZE)) | |
696 | printk(KERN_WARNING "failed to reserve 0x%08lx\n", | |
697 | bad_pages[i]); | |
698 | } | |
699 | } | |
700 | ||
701 | /* | |
702 | * Here we put platform-specific memory range workarounds, i.e. | |
703 | * memory known to be corrupt or otherwise in need to be reserved on | |
704 | * specific platforms. | |
705 | * | |
706 | * If this gets used more widely it could use a real dispatch mechanism. | |
707 | */ | |
708 | static void __init trim_platform_memory_ranges(void) | |
709 | { | |
710 | trim_snb_memory(); | |
711 | } | |
712 | ||
1b5576e6 YL |
713 | static void __init trim_bios_range(void) |
714 | { | |
715 | /* | |
716 | * A special case is the first 4Kb of memory; | |
717 | * This is a BIOS owned area, not kernel ram, but generally | |
718 | * not listed as such in the E820 table. | |
d0cd7425 PA |
719 | * |
720 | * This typically reserves additional memory (64KiB by default) | |
721 | * since some BIOSes are known to corrupt low memory. See the | |
9ea77bdb | 722 | * Kconfig help text for X86_RESERVE_LOW. |
1b5576e6 | 723 | */ |
09821ff1 | 724 | e820__range_update(0, PAGE_SIZE, E820_TYPE_RAM, E820_TYPE_RESERVED); |
d0cd7425 | 725 | |
1b5576e6 YL |
726 | /* |
727 | * special case: Some BIOSen report the PC BIOS | |
728 | * area (640->1Mb) as ram even though it is not. | |
729 | * take them out. | |
730 | */ | |
09821ff1 | 731 | e820__range_remove(BIOS_BEGIN, BIOS_END - BIOS_BEGIN, E820_TYPE_RAM, 1); |
a9acc536 | 732 | |
f9748fa0 | 733 | e820__update_table(e820_table); |
1b5576e6 YL |
734 | } |
735 | ||
b422a309 YL |
736 | /* called before trim_bios_range() to spare extra sanitize */ |
737 | static void __init e820_add_kernel_range(void) | |
738 | { | |
739 | u64 start = __pa_symbol(_text); | |
740 | u64 size = __pa_symbol(_end) - start; | |
741 | ||
742 | /* | |
09821ff1 | 743 | * Complain if .text .data and .bss are not marked as E820_TYPE_RAM and |
b422a309 YL |
744 | * attempt to fix it by adding the range. We may have a confused BIOS, |
745 | * or the user may have used memmap=exactmap or memmap=xxM$yyM to | |
746 | * exclude kernel range. If we really are running on top non-RAM, | |
747 | * we will crash later anyways. | |
748 | */ | |
09821ff1 | 749 | if (e820__mapped_all(start, start + size, E820_TYPE_RAM)) |
b422a309 YL |
750 | return; |
751 | ||
09821ff1 IM |
752 | pr_warn(".text .data .bss are not marked as E820_TYPE_RAM!\n"); |
753 | e820__range_remove(start, size, E820_TYPE_RAM, 0); | |
754 | e820__range_add(start, size, E820_TYPE_RAM); | |
b422a309 YL |
755 | } |
756 | ||
95c96084 PA |
757 | static unsigned reserve_low = CONFIG_X86_RESERVE_LOW << 10; |
758 | ||
9ea77bdb PA |
759 | static int __init parse_reservelow(char *p) |
760 | { | |
761 | unsigned long long size; | |
762 | ||
763 | if (!p) | |
764 | return -EINVAL; | |
765 | ||
766 | size = memparse(p, &p); | |
767 | ||
768 | if (size < 4096) | |
769 | size = 4096; | |
770 | ||
771 | if (size > 640*1024) | |
772 | size = 640*1024; | |
773 | ||
774 | reserve_low = size; | |
775 | ||
776 | return 0; | |
777 | } | |
778 | ||
779 | early_param("reservelow", parse_reservelow); | |
780 | ||
95c96084 PA |
781 | static void __init trim_low_memory_range(void) |
782 | { | |
783 | memblock_reserve(0, ALIGN(reserve_low, PAGE_SIZE)); | |
784 | } | |
785 | ||
f32360ef KC |
786 | /* |
787 | * Dump out kernel offset information on panic. | |
788 | */ | |
789 | static int | |
790 | dump_kernel_offset(struct notifier_block *self, unsigned long v, void *p) | |
791 | { | |
78cac48c BP |
792 | if (kaslr_enabled()) { |
793 | pr_emerg("Kernel Offset: 0x%lx from 0x%lx (relocation range: 0x%lx-0x%lx)\n", | |
4545c898 | 794 | kaslr_offset(), |
78cac48c BP |
795 | __START_KERNEL, |
796 | __START_KERNEL_map, | |
797 | MODULES_VADDR-1); | |
798 | } else { | |
799 | pr_emerg("Kernel Offset: disabled\n"); | |
800 | } | |
f32360ef KC |
801 | |
802 | return 0; | |
803 | } | |
804 | ||
1da177e4 LT |
805 | /* |
806 | * Determine if we were loaded by an EFI loader. If so, then we have also been | |
807 | * passed the efi memmap, systab, etc., so we should use these data structures | |
808 | * for initialization. Note, the efi init code path is determined by the | |
809 | * global efi_enabled. This allows the same kernel image to be used on existing | |
810 | * systems (with a traditional BIOS) as well as on EFI systems. | |
811 | */ | |
76934ed4 YL |
812 | /* |
813 | * setup_arch - architecture-specific boot-time initializations | |
814 | * | |
815 | * Note: On x86_64, fixmaps are ready for use even before this is called. | |
816 | */ | |
817 | ||
1da177e4 LT |
818 | void __init setup_arch(char **cmdline_p) |
819 | { | |
6c902b65 YL |
820 | memblock_reserve(__pa_symbol(_text), |
821 | (unsigned long)__bss_stop - (unsigned long)_text); | |
822 | ||
1b8c78be YL |
823 | early_reserve_initrd(); |
824 | ||
6c902b65 YL |
825 | /* |
826 | * At this point everything still needed from the boot loader | |
827 | * or BIOS or kernel text should be early reserved or marked not | |
828 | * RAM in e820. All other memory is free game. | |
829 | */ | |
830 | ||
76934ed4 | 831 | #ifdef CONFIG_X86_32 |
1da177e4 | 832 | memcpy(&boot_cpu_data, &new_cpu_data, sizeof(new_cpu_data)); |
b40827fa BP |
833 | |
834 | /* | |
835 | * copy kernel address range established so far and switch | |
836 | * to the proper swapper page table | |
837 | */ | |
838 | clone_pgd_range(swapper_pg_dir + KERNEL_PGD_BOUNDARY, | |
839 | initial_page_table + KERNEL_PGD_BOUNDARY, | |
840 | KERNEL_PGD_PTRS); | |
841 | ||
842 | load_cr3(swapper_pg_dir); | |
2075244f BD |
843 | /* |
844 | * Note: Quark X1000 CPUs advertise PGE incorrectly and require | |
845 | * a cr3 based tlb flush, so the following __flush_tlb_all() | |
846 | * will not flush anything because the cpu quirk which clears | |
847 | * X86_FEATURE_PGE has not been invoked yet. Though due to the | |
848 | * load_cr3() above the TLB has been flushed already. The | |
849 | * quirk is invoked before subsequent calls to __flush_tlb_all() | |
850 | * so proper operation is guaranteed. | |
851 | */ | |
b40827fa | 852 | __flush_tlb_all(); |
76934ed4 YL |
853 | #else |
854 | printk(KERN_INFO "Command line: %s\n", boot_command_line); | |
855 | #endif | |
1da177e4 | 856 | |
9863c90f AK |
857 | /* |
858 | * If we have OLPC OFW, we might end up relocating the fixmap due to | |
859 | * reserve_top(), so do this before touching the ioremap area. | |
860 | */ | |
fd699c76 AS |
861 | olpc_ofw_detect(); |
862 | ||
433f8924 | 863 | idt_setup_early_traps(); |
9e882c92 | 864 | early_cpu_init(); |
1a98fd14 JF |
865 | early_ioremap_init(); |
866 | ||
fd699c76 AS |
867 | setup_olpc_ofw_pgd(); |
868 | ||
30c82645 PA |
869 | ROOT_DEV = old_decode_dev(boot_params.hdr.root_dev); |
870 | screen_info = boot_params.screen_info; | |
871 | edid_info = boot_params.edid_info; | |
76934ed4 | 872 | #ifdef CONFIG_X86_32 |
30c82645 PA |
873 | apm_info.bios = boot_params.apm_bios_info; |
874 | ist_info = boot_params.ist_info; | |
76934ed4 YL |
875 | #endif |
876 | saved_video_mode = boot_params.hdr.vid_mode; | |
30c82645 | 877 | bootloader_type = boot_params.hdr.type_of_loader; |
5031296c PA |
878 | if ((bootloader_type >> 4) == 0xe) { |
879 | bootloader_type &= 0xf; | |
880 | bootloader_type |= (boot_params.hdr.ext_loader_type+0x10) << 4; | |
881 | } | |
882 | bootloader_version = bootloader_type & 0xf; | |
883 | bootloader_version |= boot_params.hdr.ext_loader_ver << 4; | |
1da177e4 LT |
884 | |
885 | #ifdef CONFIG_BLK_DEV_RAM | |
30c82645 PA |
886 | rd_image_start = boot_params.hdr.ram_size & RAMDISK_IMAGE_START_MASK; |
887 | rd_prompt = ((boot_params.hdr.ram_size & RAMDISK_PROMPT_FLAG) != 0); | |
888 | rd_doload = ((boot_params.hdr.ram_size & RAMDISK_LOAD_FLAG) != 0); | |
1da177e4 | 889 | #endif |
7465252e YL |
890 | #ifdef CONFIG_EFI |
891 | if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature, | |
9402973d | 892 | EFI32_LOADER_SIGNATURE, 4)) { |
3e909599 | 893 | set_bit(EFI_BOOT, &efi.flags); |
1adbfa35 | 894 | } else if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature, |
9402973d | 895 | EFI64_LOADER_SIGNATURE, 4)) { |
3e909599 MF |
896 | set_bit(EFI_BOOT, &efi.flags); |
897 | set_bit(EFI_64BIT, &efi.flags); | |
7465252e YL |
898 | } |
899 | #endif | |
900 | ||
42bbdb43 | 901 | x86_init.oem.arch_setup(); |
2215e69d | 902 | |
419afdf5 | 903 | iomem_resource.end = (1ULL << boot_cpu_data.x86_phys_bits) - 1; |
103e2063 | 904 | e820__memory_setup(); |
28bb2237 YL |
905 | parse_setup_data(); |
906 | ||
1da177e4 LT |
907 | copy_edd(); |
908 | ||
30c82645 | 909 | if (!boot_params.hdr.root_flags) |
1da177e4 LT |
910 | root_mountflags &= ~MS_RDONLY; |
911 | init_mm.start_code = (unsigned long) _text; | |
912 | init_mm.end_code = (unsigned long) _etext; | |
913 | init_mm.end_data = (unsigned long) _edata; | |
93dbda7c | 914 | init_mm.brk = _brk_end; |
fe3d197f DH |
915 | |
916 | mpx_mm_init(&init_mm); | |
1da177e4 | 917 | |
4046d6e8 LT |
918 | code_resource.start = __pa_symbol(_text); |
919 | code_resource.end = __pa_symbol(_etext)-1; | |
920 | data_resource.start = __pa_symbol(_etext); | |
921 | data_resource.end = __pa_symbol(_edata)-1; | |
922 | bss_resource.start = __pa_symbol(__bss_start); | |
923 | bss_resource.end = __pa_symbol(__bss_stop)-1; | |
924 | ||
516cbf37 TB |
925 | #ifdef CONFIG_CMDLINE_BOOL |
926 | #ifdef CONFIG_CMDLINE_OVERRIDE | |
927 | strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE); | |
928 | #else | |
929 | if (builtin_cmdline[0]) { | |
930 | /* append boot loader cmdline to builtin */ | |
931 | strlcat(builtin_cmdline, " ", COMMAND_LINE_SIZE); | |
932 | strlcat(builtin_cmdline, boot_command_line, COMMAND_LINE_SIZE); | |
933 | strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE); | |
934 | } | |
935 | #endif | |
936 | #endif | |
937 | ||
eda6da92 YL |
938 | strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE); |
939 | *cmdline_p = command_line; | |
940 | ||
eda6da92 | 941 | /* |
4b0f3b81 KC |
942 | * x86_configure_nx() is called before parse_early_param() to detect |
943 | * whether hardware doesn't support NX (so that the early EHCI debug | |
944 | * console setup can safely call set_fixmap()). It may then be called | |
945 | * again from within noexec_setup() during parsing early parameters | |
946 | * to honor the respective command line option. | |
eda6da92 | 947 | */ |
4763ed4d | 948 | x86_configure_nx(); |
eda6da92 YL |
949 | |
950 | parse_early_param(); | |
951 | ||
835bcec5 DY |
952 | if (efi_enabled(EFI_BOOT)) |
953 | efi_memblock_x86_reserve_range(); | |
39fa104d RA |
954 | #ifdef CONFIG_MEMORY_HOTPLUG |
955 | /* | |
956 | * Memory used by the kernel cannot be hot-removed because Linux | |
957 | * cannot migrate the kernel pages. When memory hotplug is | |
958 | * enabled, we should prevent memblock from allocating memory | |
959 | * for the kernel. | |
960 | * | |
961 | * ACPI SRAT records all hotpluggable memory ranges. But before | |
962 | * SRAT is parsed, we don't know about it. | |
963 | * | |
964 | * The kernel image is loaded into memory at very early time. We | |
965 | * cannot prevent this anyway. So on NUMA system, we set any | |
966 | * node the kernel resides in as un-hotpluggable. | |
967 | * | |
968 | * Since on modern servers, one node could have double-digit | |
969 | * gigabytes memory, we can assume the memory around the kernel | |
970 | * image is also un-hotpluggable. So before SRAT is parsed, just | |
971 | * allocate memory near the kernel image to try the best to keep | |
972 | * the kernel away from hotpluggable memory. | |
973 | */ | |
974 | if (movable_node_is_enabled()) | |
975 | memblock_set_bottom_up(true); | |
976 | #endif | |
977 | ||
4b0f3b81 | 978 | x86_report_nx(); |
0ad5bce7 | 979 | |
28bb2237 | 980 | /* after early param, so could get panic from serial */ |
a9ce6bc1 | 981 | memblock_x86_reserve_range_setup_data(); |
28bb2237 | 982 | |
76934ed4 | 983 | if (acpi_mps_check()) { |
3eb11edc | 984 | #ifdef CONFIG_X86_LOCAL_APIC |
76934ed4 | 985 | disable_apic = 1; |
3eb11edc | 986 | #endif |
988781dc | 987 | setup_clear_cpu_cap(X86_FEATURE_APIC); |
3c999f14 YL |
988 | } |
989 | ||
dc7c65db LT |
990 | #ifdef CONFIG_PCI |
991 | if (pci_early_dump_regs) | |
992 | early_dump_pci_devices(); | |
993 | #endif | |
994 | ||
1a127034 | 995 | e820__reserve_setup_data(); |
9641bdaf | 996 | e820__finish_early_params(); |
1a3f239d | 997 | |
83e68189 | 998 | if (efi_enabled(EFI_BOOT)) |
ff0c0874 BM |
999 | efi_init(); |
1000 | ||
2216d199 | 1001 | dmi_scan_machine(); |
dd6dad42 | 1002 | dmi_memdev_walk(); |
98e5e1bf | 1003 | dmi_set_dump_stack_arch_desc(); |
2216d199 | 1004 | |
88b094fb AK |
1005 | /* |
1006 | * VMware detection requires dmi to be available, so this | |
a1652bb8 | 1007 | * needs to be done after dmi_scan_machine(), for the boot CPU. |
88b094fb | 1008 | */ |
2d826404 | 1009 | init_hypervisor_platform(); |
88b094fb | 1010 | |
f7cf5a5b | 1011 | x86_init.resources.probe_roms(); |
41c094fd | 1012 | |
4046d6e8 LT |
1013 | /* after parse_early_param, so could debug it */ |
1014 | insert_resource(&iomem_resource, &code_resource); | |
1015 | insert_resource(&iomem_resource, &data_resource); | |
1016 | insert_resource(&iomem_resource, &bss_resource); | |
1017 | ||
b422a309 | 1018 | e820_add_kernel_range(); |
1b5576e6 | 1019 | trim_bios_range(); |
76934ed4 | 1020 | #ifdef CONFIG_X86_32 |
cc9f7a0c | 1021 | if (ppro_with_ram_bug()) { |
09821ff1 IM |
1022 | e820__range_update(0x70000000ULL, 0x40000ULL, E820_TYPE_RAM, |
1023 | E820_TYPE_RESERVED); | |
f9748fa0 | 1024 | e820__update_table(e820_table); |
cc9f7a0c | 1025 | printk(KERN_INFO "fixed physical RAM map:\n"); |
be0c3f0f | 1026 | e820__print_table("bad_ppro"); |
cc9f7a0c | 1027 | } |
76934ed4 YL |
1028 | #else |
1029 | early_gart_iommu_check(); | |
1030 | #endif | |
cc9f7a0c | 1031 | |
7b2a0a6c YL |
1032 | /* |
1033 | * partially used pages are not usable - thus | |
1034 | * we are rounding upwards: | |
1035 | */ | |
0c6fc11a | 1036 | max_pfn = e820__end_of_ram_pfn(); |
7b2a0a6c | 1037 | |
093af8d7 YL |
1038 | /* update e820 for memory not covered by WB MTRRs */ |
1039 | mtrr_bp_init(); | |
2dc807b3 | 1040 | if (mtrr_trim_uncached_memory(max_pfn)) |
0c6fc11a | 1041 | max_pfn = e820__end_of_ram_pfn(); |
76c32418 | 1042 | |
8dd33030 IM |
1043 | max_possible_pfn = max_pfn; |
1044 | ||
99c13b8c MP |
1045 | /* |
1046 | * This call is required when the CPU does not support PAT. If | |
1047 | * mtrr_bp_init() invoked it already via pat_init() the call has no | |
1048 | * effect. | |
1049 | */ | |
1050 | init_cache_modes(); | |
1051 | ||
c7d2361f TG |
1052 | /* |
1053 | * Define random base addresses for memory sections after max_pfn is | |
1054 | * defined and before each memory section base is used. | |
1055 | */ | |
1056 | kernel_randomize_memory(); | |
1057 | ||
76934ed4 | 1058 | #ifdef CONFIG_X86_32 |
4e29684c | 1059 | /* max_low_pfn get updated here */ |
2ec65f8b | 1060 | find_low_pfn_range(); |
76934ed4 | 1061 | #else |
06cd9a7d | 1062 | check_x2apic(); |
76934ed4 YL |
1063 | |
1064 | /* How many end-of-memory variables you have, grandma! */ | |
1065 | /* need this before calling reserve_initrd */ | |
f361a450 | 1066 | if (max_pfn > (1UL<<(32 - PAGE_SHIFT))) |
0c6fc11a | 1067 | max_low_pfn = e820__end_of_low_ram_pfn(); |
f361a450 YL |
1068 | else |
1069 | max_low_pfn = max_pfn; | |
1070 | ||
76934ed4 | 1071 | high_memory = (void *)__va(max_pfn * PAGE_SIZE - 1) + 1; |
5394f80f JF |
1072 | #endif |
1073 | ||
893f38d1 YL |
1074 | /* |
1075 | * Find and reserve possible boot-time SMP configuration: | |
1076 | */ | |
1077 | find_smp_config(); | |
1078 | ||
042be38e YL |
1079 | reserve_ibft_region(); |
1080 | ||
8d57470d YL |
1081 | early_alloc_pgt_buf(); |
1082 | ||
72d7c3b3 | 1083 | /* |
4918e228 | 1084 | * Need to conclude brk, before e820__memblock_setup() |
72d7c3b3 YL |
1085 | * it could use memblock_find_in_range, could overlap with |
1086 | * brk area. | |
1087 | */ | |
1088 | reserve_brk(); | |
1089 | ||
e5f15b45 YL |
1090 | cleanup_highmap(); |
1091 | ||
2449f343 | 1092 | memblock_set_current_limit(ISA_END_ADDRESS); |
4918e228 | 1093 | e820__memblock_setup(); |
72d7c3b3 | 1094 | |
4971531a MF |
1095 | reserve_bios_regions(); |
1096 | ||
1097 | if (efi_enabled(EFI_MEMMAP)) { | |
0f96a99d | 1098 | efi_fake_memmap(); |
b05b9f5f | 1099 | efi_find_mirror(); |
3dad6f7f | 1100 | efi_esrt_init(); |
007b7560 | 1101 | |
4971531a MF |
1102 | /* |
1103 | * The EFI specification says that boot service code won't be | |
1104 | * called after ExitBootServices(). This is, in fact, a lie. | |
1105 | */ | |
916f676f | 1106 | efi_reserve_boot_services(); |
4971531a | 1107 | } |
916f676f | 1108 | |
72d7c3b3 | 1109 | /* preallocate 4k for mptable mpc */ |
5da217ca | 1110 | e820__memblock_alloc_reserved_mpc_new(); |
72d7c3b3 YL |
1111 | |
1112 | #ifdef CONFIG_X86_CHECK_BIOS_CORRUPTION | |
1113 | setup_bios_corruption_check(); | |
1114 | #endif | |
1115 | ||
10054230 | 1116 | #ifdef CONFIG_X86_32 |
365811d6 BH |
1117 | printk(KERN_DEBUG "initial memory mapped: [mem 0x00000000-%#010lx]\n", |
1118 | (max_pfn_mapped<<PAGE_SHIFT) - 1); | |
10054230 | 1119 | #endif |
72d7c3b3 | 1120 | |
4f7b9226 | 1121 | reserve_real_mode(); |
893f38d1 | 1122 | |
a9acc536 | 1123 | trim_platform_memory_ranges(); |
95c96084 | 1124 | trim_low_memory_range(); |
a9acc536 | 1125 | |
22ddfcaa | 1126 | init_mem_mapping(); |
1bbbbe77 | 1127 | |
433f8924 | 1128 | idt_setup_early_pf(); |
1bbbbe77 | 1129 | |
18bc7bd5 AL |
1130 | /* |
1131 | * Update mmu_cr4_features (and, indirectly, trampoline_cr4_features) | |
1132 | * with the current CR4 value. This may not be necessary, but | |
1133 | * auditing all the early-boot CR4 manipulation would be needed to | |
1134 | * rule it out. | |
c7ad5ad2 AL |
1135 | * |
1136 | * Mask off features that don't work outside long mode (just | |
1137 | * PCIDE for now). | |
18bc7bd5 | 1138 | */ |
c7ad5ad2 | 1139 | mmu_cr4_features = __read_cr4() & ~X86_CR4_PCIDE; |
18bc7bd5 | 1140 | |
4ce7a869 | 1141 | memblock_set_current_limit(get_max_mapped()); |
4e29684c | 1142 | |
e7b37895 YL |
1143 | /* |
1144 | * NOTE: On x86-32, only from this point on, fixmaps are ready for use. | |
1145 | */ | |
1146 | ||
1147 | #ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT | |
1148 | if (init_ohci1394_dma_early) | |
1149 | init_ohci1394_dma_on_all_controllers(); | |
1150 | #endif | |
162a7e75 MT |
1151 | /* Allocate bigger log buffer */ |
1152 | setup_log_buf(1); | |
e7b37895 | 1153 | |
9661b332 DH |
1154 | if (efi_enabled(EFI_BOOT)) { |
1155 | switch (boot_params.secure_boot) { | |
1156 | case efi_secureboot_mode_disabled: | |
1157 | pr_info("Secure boot disabled\n"); | |
1158 | break; | |
1159 | case efi_secureboot_mode_enabled: | |
1160 | pr_info("Secure boot enabled\n"); | |
1161 | break; | |
1162 | default: | |
1163 | pr_info("Secure boot could not be determined\n"); | |
1164 | break; | |
1165 | } | |
1166 | } | |
1167 | ||
2ec65f8b YL |
1168 | reserve_initrd(); |
1169 | ||
da3d3f98 | 1170 | acpi_table_upgrade(); |
53aac44c | 1171 | |
76934ed4 | 1172 | vsmp_init(); |
76934ed4 | 1173 | |
1c6e5503 YL |
1174 | io_delay_init(); |
1175 | ||
630b3aff LW |
1176 | early_platform_quirks(); |
1177 | ||
1c6e5503 YL |
1178 | /* |
1179 | * Parse the ACPI tables for possible boot-time SMP configuration. | |
1180 | */ | |
20e6926d YL |
1181 | acpi_boot_table_init(); |
1182 | ||
1183 | early_acpi_boot_init(); | |
1184 | ||
d8fc3afc | 1185 | initmem_init(); |
3c325f82 | 1186 | dma_contiguous_reserve(max_pfn_mapped << PAGE_SHIFT); |
fa591c4a TC |
1187 | |
1188 | /* | |
1189 | * Reserve memory for crash kernel after SRAT is parsed so that it | |
1190 | * won't consume hotpluggable memory. | |
1191 | */ | |
1192 | reserve_crashkernel(); | |
1193 | ||
6f2a7536 | 1194 | memblock_find_dma_reserve(); |
91467bdf | 1195 | |
90993cdd | 1196 | #ifdef CONFIG_KVM_GUEST |
790c73f6 GOC |
1197 | kvmclock_init(); |
1198 | #endif | |
1199 | ||
ccb64941 BO |
1200 | tsc_early_delay_calibrate(); |
1201 | if (!early_xdbc_setup_hardware()) | |
1202 | early_xdbc_register_console(); | |
1203 | ||
7737b215 | 1204 | x86_init.paging.pagetable_init(); |
f212ec4b | 1205 | |
ef7f0d6a AR |
1206 | kasan_init(); |
1207 | ||
d2b6dc61 AL |
1208 | #ifdef CONFIG_X86_32 |
1209 | /* sync back kernel address range */ | |
1210 | clone_pgd_range(initial_page_table + KERNEL_PGD_BOUNDARY, | |
1211 | swapper_pg_dir + KERNEL_PGD_BOUNDARY, | |
1212 | KERNEL_PGD_PTRS); | |
1213 | ||
1214 | /* | |
1215 | * sync back low identity map too. It is used for example | |
1216 | * in the 32-bit EFI stub. | |
1217 | */ | |
1218 | clone_pgd_range(initial_page_table, | |
1219 | swapper_pg_dir + KERNEL_PGD_BOUNDARY, | |
1220 | min(KERNEL_PGD_PTRS, KERNEL_PGD_BOUNDARY)); | |
1221 | #endif | |
1222 | ||
31625340 JC |
1223 | tboot_probe(); |
1224 | ||
76934ed4 | 1225 | map_vsyscall(); |
76934ed4 | 1226 | |
1a3f239d | 1227 | generic_apic_probe(); |
1da177e4 | 1228 | |
54ef3400 | 1229 | early_quirks(); |
d44647b0 | 1230 | |
295deae4 YL |
1231 | /* |
1232 | * Read APIC and some other early information from ACPI tables. | |
1233 | */ | |
1da177e4 | 1234 | acpi_boot_init(); |
efafc8b2 | 1235 | sfi_init(); |
a906fdaa | 1236 | x86_dtb_init(); |
04606618 | 1237 | |
295deae4 YL |
1238 | /* |
1239 | * get boot-time SMP configuration: | |
1240 | */ | |
a91bf718 | 1241 | get_smp_config(); |
76934ed4 | 1242 | |
1e90a13d TG |
1243 | /* |
1244 | * Systems w/o ACPI and mptables might not have it mapped the local | |
1245 | * APIC yet, but prefill_possible_map() might need to access it. | |
1246 | */ | |
1247 | init_apic_mappings(); | |
1248 | ||
329513a3 | 1249 | prefill_possible_map(); |
301e6190 | 1250 | |
5f4765f9 | 1251 | init_cpu_to_node(); |
5f4765f9 | 1252 | |
ca1b8862 | 1253 | io_apic_init_mappings(); |
9d6a4d08 | 1254 | |
f3614646 | 1255 | x86_init.hyper.guest_late_init(); |
1da177e4 | 1256 | |
1506c8dc | 1257 | e820__reserve_resources(); |
090d7171 | 1258 | e820__register_nosave_regions(max_low_pfn); |
1da177e4 | 1259 | |
8fee697d | 1260 | x86_init.resources.reserve_resources(); |
41c094fd | 1261 | |
2df908ba | 1262 | e820__setup_pci_gap(); |
41c094fd | 1263 | |
1da177e4 LT |
1264 | #ifdef CONFIG_VT |
1265 | #if defined(CONFIG_VGA_CONSOLE) | |
83e68189 | 1266 | if (!efi_enabled(EFI_BOOT) || (efi_mem_type(0xa0000) != EFI_CONVENTIONAL_MEMORY)) |
1da177e4 LT |
1267 | conswitchp = &vga_con; |
1268 | #elif defined(CONFIG_DUMMY_CONSOLE) | |
1269 | conswitchp = &dummy_con; | |
1270 | #endif | |
1271 | #endif | |
6f30c1ac | 1272 | x86_init.oem.banner(); |
a2202aa2 | 1273 | |
6b617e22 FT |
1274 | x86_init.timers.wallclock_init(); |
1275 | ||
a2202aa2 | 1276 | mcheck_init(); |
f49aa448 | 1277 | |
dc326fca | 1278 | arch_init_ideal_nops(); |
b3c869d3 JS |
1279 | |
1280 | register_refined_jiffies(CLOCK_TICK_RATE); | |
5189c2a7 OJ |
1281 | |
1282 | #ifdef CONFIG_EFI | |
a5d90c92 BP |
1283 | if (efi_enabled(EFI_BOOT)) |
1284 | efi_apply_memmap_quirks(); | |
5189c2a7 | 1285 | #endif |
ee9f8fce JP |
1286 | |
1287 | unwind_init(); | |
1da177e4 | 1288 | } |
5649b7c3 | 1289 | |
9be1b56a IM |
1290 | #ifdef CONFIG_X86_32 |
1291 | ||
8fee697d TG |
1292 | static struct resource video_ram_resource = { |
1293 | .name = "Video RAM area", | |
1294 | .start = 0xa0000, | |
1295 | .end = 0xbffff, | |
1296 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM | |
9be1b56a IM |
1297 | }; |
1298 | ||
8fee697d | 1299 | void __init i386_reserve_resources(void) |
9be1b56a | 1300 | { |
8fee697d TG |
1301 | request_resource(&iomem_resource, &video_ram_resource); |
1302 | reserve_standard_io_resources(); | |
9be1b56a IM |
1303 | } |
1304 | ||
9be1b56a | 1305 | #endif /* CONFIG_X86_32 */ |
f32360ef KC |
1306 | |
1307 | static struct notifier_block kernel_offset_notifier = { | |
1308 | .notifier_call = dump_kernel_offset | |
1309 | }; | |
1310 | ||
1311 | static int __init register_kernel_offset_dumper(void) | |
1312 | { | |
1313 | atomic_notifier_chain_register(&panic_notifier_list, | |
1314 | &kernel_offset_notifier); | |
1315 | return 0; | |
1316 | } | |
1317 | __initcall(register_kernel_offset_dumper); | |
c1192f84 DH |
1318 | |
1319 | void arch_show_smap(struct seq_file *m, struct vm_area_struct *vma) | |
1320 | { | |
1321 | if (!boot_cpu_has(X86_FEATURE_OSPKE)) | |
1322 | return; | |
1323 | ||
1324 | seq_printf(m, "ProtectionKey: %8u\n", vma_pkey(vma)); | |
1325 | } |