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457c8996 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
1da177e4 | 2 | /* |
1da177e4 LT |
3 | * Copyright (C) 1995 Linus Torvalds |
4 | * | |
12609013 IM |
5 | * This file contains the setup_arch() code, which handles the architecture-dependent |
6 | * parts of early kernel initialization. | |
1da177e4 | 7 | */ |
1da177e4 | 8 | #include <linux/console.h> |
12609013 IM |
9 | #include <linux/crash_dump.h> |
10 | #include <linux/dmi.h> | |
1da177e4 | 11 | #include <linux/efi.h> |
12609013 IM |
12 | #include <linux/init_ohci1394_dma.h> |
13 | #include <linux/initrd.h> | |
138fe4e0 | 14 | #include <linux/iscsi_ibft.h> |
12609013 | 15 | #include <linux/memblock.h> |
376ff035 | 16 | #include <linux/pci.h> |
12609013 IM |
17 | #include <linux/root_dev.h> |
18 | #include <linux/sfi.h> | |
69575d38 | 19 | #include <linux/tboot.h> |
1b5aeebf | 20 | #include <linux/usb/xhci-dbgp.h> |
1bc3b91a | 21 | |
12609013 IM |
22 | #include <uapi/linux/mount.h> |
23 | ||
24 | #include <xen/xen.h> | |
25 | ||
9635b47d | 26 | #include <asm/apic.h> |
ce3fe6b2 | 27 | #include <asm/bios_ebda.h> |
cc9f7a0c | 28 | #include <asm/bugs.h> |
6e5385d4 | 29 | #include <asm/cpu.h> |
12609013 | 30 | #include <asm/efi.h> |
1d9b16d1 | 31 | #include <asm/gart.h> |
88b094fb | 32 | #include <asm/hypervisor.h> |
12609013 IM |
33 | #include <asm/io_apic.h> |
34 | #include <asm/kasan.h> | |
35 | #include <asm/kaslr.h> | |
a2202aa2 | 36 | #include <asm/mce.h> |
12609013 IM |
37 | #include <asm/mtrr.h> |
38 | #include <asm/olpc_ofw.h> | |
39 | #include <asm/pci-direct.h> | |
da6b737b | 40 | #include <asm/prom.h> |
12609013 | 41 | #include <asm/proto.h> |
ee9f8fce | 42 | #include <asm/unwind.h> |
12609013 | 43 | #include <asm/vsyscall.h> |
186525bd | 44 | #include <linux/vmalloc.h> |
46d671b5 | 45 | |
2b72394e | 46 | /* |
360db4ac IM |
47 | * max_low_pfn_mapped: highest directly mapped pfn < 4 GB |
48 | * max_pfn_mapped: highest directly mapped pfn > 4 GB | |
66520ebc | 49 | * |
09821ff1 | 50 | * The direct mapping only covers E820_TYPE_RAM regions, so the ranges and gaps are |
360db4ac | 51 | * represented by pfn_mapped[]. |
2b72394e PE |
52 | */ |
53 | unsigned long max_low_pfn_mapped; | |
54 | unsigned long max_pfn_mapped; | |
55 | ||
e808bae2 | 56 | #ifdef CONFIG_DMI |
796216a5 | 57 | RESERVE_BRK(dmi_alloc, 65536); |
e808bae2 | 58 | #endif |
796216a5 | 59 | |
c0b5842a | 60 | |
360db4ac IM |
61 | /* |
62 | * Range of the BSS area. The size of the BSS area is determined | |
63 | * at link time, with RESERVE_BRK*() facility reserving additional | |
64 | * chunks. | |
65 | */ | |
66 | static __initdata | |
67 | unsigned long _brk_start = (unsigned long)__brk_base; | |
68 | unsigned long _brk_end = (unsigned long)__brk_base; | |
93dbda7c | 69 | |
217b8ce8 | 70 | struct boot_params boot_params; |
217b8ce8 | 71 | |
4046d6e8 | 72 | /* |
360db4ac IM |
73 | * These are the four main kernel memory regions, we put them into |
74 | * the resource tree so that kdump tools and other debugging tools | |
75 | * recover it: | |
4046d6e8 | 76 | */ |
360db4ac | 77 | |
a3299754 KC |
78 | static struct resource rodata_resource = { |
79 | .name = "Kernel rodata", | |
80 | .start = 0, | |
81 | .end = 0, | |
82 | .flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM | |
83 | }; | |
84 | ||
4046d6e8 LT |
85 | static struct resource data_resource = { |
86 | .name = "Kernel data", | |
87 | .start = 0, | |
88 | .end = 0, | |
89 | .flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM | |
90 | }; | |
91 | ||
92 | static struct resource code_resource = { | |
93 | .name = "Kernel code", | |
94 | .start = 0, | |
95 | .end = 0, | |
96 | .flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM | |
97 | }; | |
98 | ||
99 | static struct resource bss_resource = { | |
100 | .name = "Kernel bss", | |
101 | .start = 0, | |
102 | .end = 0, | |
103 | .flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM | |
104 | }; | |
105 | ||
106 | ||
7dea23ec | 107 | #ifdef CONFIG_X86_32 |
360db4ac | 108 | /* CPU data as detected by the assembly code in head_32.S */ |
6415813b MK |
109 | struct cpuinfo_x86 new_cpu_data; |
110 | ||
360db4ac | 111 | /* Common CPU data for all CPUs */ |
6415813b | 112 | struct cpuinfo_x86 boot_cpu_data __read_mostly; |
129f6946 | 113 | EXPORT_SYMBOL(boot_cpu_data); |
1da177e4 | 114 | |
0c254e38 AS |
115 | unsigned int def_to_bigsmp; |
116 | ||
360db4ac | 117 | /* For MCA, but anyone else can use it if they want */ |
1da177e4 LT |
118 | unsigned int machine_id; |
119 | unsigned int machine_submodel_id; | |
120 | unsigned int BIOS_revision; | |
1da177e4 | 121 | |
7dea23ec YL |
122 | struct apm_info apm_info; |
123 | EXPORT_SYMBOL(apm_info); | |
124 | ||
125 | #if defined(CONFIG_X86_SPEEDSTEP_SMI) || \ | |
126 | defined(CONFIG_X86_SPEEDSTEP_SMI_MODULE) | |
127 | struct ist_info ist_info; | |
128 | EXPORT_SYMBOL(ist_info); | |
129 | #else | |
130 | struct ist_info ist_info; | |
131 | #endif | |
132 | ||
133 | #else | |
162434e7 | 134 | struct cpuinfo_x86 boot_cpu_data __read_mostly; |
7dea23ec YL |
135 | EXPORT_SYMBOL(boot_cpu_data); |
136 | #endif | |
137 | ||
138 | ||
139 | #if !defined(CONFIG_X86_PAE) || defined(CONFIG_X86_64) | |
404f6aac | 140 | __visible unsigned long mmu_cr4_features __ro_after_init; |
7dea23ec | 141 | #else |
404f6aac | 142 | __visible unsigned long mmu_cr4_features __ro_after_init = X86_CR4_PAE; |
7dea23ec YL |
143 | #endif |
144 | ||
5031296c PA |
145 | /* Boot loader ID and version as integers, for the benefit of proc_dointvec */ |
146 | int bootloader_type, bootloader_version; | |
1da177e4 | 147 | |
1da177e4 LT |
148 | /* |
149 | * Setup options | |
150 | */ | |
1da177e4 | 151 | struct screen_info screen_info; |
129f6946 | 152 | EXPORT_SYMBOL(screen_info); |
1da177e4 | 153 | struct edid_info edid_info; |
5e518d76 | 154 | EXPORT_SYMBOL_GPL(edid_info); |
1da177e4 | 155 | |
1da177e4 LT |
156 | extern int root_mountflags; |
157 | ||
e44b7b75 | 158 | unsigned long saved_video_mode; |
1da177e4 | 159 | |
cf8fa920 | 160 | #define RAMDISK_IMAGE_START_MASK 0x07FF |
1da177e4 | 161 | #define RAMDISK_PROMPT_FLAG 0x8000 |
cf8fa920 | 162 | #define RAMDISK_LOAD_FLAG 0x4000 |
1da177e4 | 163 | |
4e498b66 | 164 | static char __initdata command_line[COMMAND_LINE_SIZE]; |
516cbf37 TB |
165 | #ifdef CONFIG_CMDLINE_BOOL |
166 | static char __initdata builtin_cmdline[COMMAND_LINE_SIZE] = CONFIG_CMDLINE; | |
167 | #endif | |
1da177e4 | 168 | |
1da177e4 LT |
169 | #if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE) |
170 | struct edd edd; | |
171 | #ifdef CONFIG_EDD_MODULE | |
172 | EXPORT_SYMBOL(edd); | |
173 | #endif | |
174 | /** | |
175 | * copy_edd() - Copy the BIOS EDD information | |
176 | * from boot_params into a safe place. | |
177 | * | |
178 | */ | |
9eaa192d | 179 | static inline void __init copy_edd(void) |
1da177e4 | 180 | { |
30c82645 PA |
181 | memcpy(edd.mbr_signature, boot_params.edd_mbr_sig_buffer, |
182 | sizeof(edd.mbr_signature)); | |
183 | memcpy(edd.edd_info, boot_params.eddbuf, sizeof(edd.edd_info)); | |
184 | edd.mbr_signature_nr = boot_params.edd_mbr_sig_buf_entries; | |
185 | edd.edd_info_nr = boot_params.eddbuf_entries; | |
1da177e4 LT |
186 | } |
187 | #else | |
9eaa192d | 188 | static inline void __init copy_edd(void) |
1da177e4 LT |
189 | { |
190 | } | |
191 | #endif | |
192 | ||
5368a2be PA |
193 | void * __init extend_brk(size_t size, size_t align) |
194 | { | |
195 | size_t mask = align - 1; | |
196 | void *ret; | |
197 | ||
198 | BUG_ON(_brk_start == 0); | |
199 | BUG_ON(align & mask); | |
200 | ||
201 | _brk_end = (_brk_end + mask) & ~mask; | |
202 | BUG_ON((char *)(_brk_end + size) > __brk_limit); | |
203 | ||
204 | ret = (void *)_brk_end; | |
205 | _brk_end += size; | |
206 | ||
207 | memset(ret, 0, size); | |
208 | ||
209 | return ret; | |
210 | } | |
211 | ||
148b2098 | 212 | #ifdef CONFIG_X86_32 |
e5f15b45 | 213 | static void __init cleanup_highmap(void) |
f005fe12 YL |
214 | { |
215 | } | |
854c879f PE |
216 | #endif |
217 | ||
5368a2be PA |
218 | static void __init reserve_brk(void) |
219 | { | |
220 | if (_brk_end > _brk_start) | |
fc8d7826 AD |
221 | memblock_reserve(__pa_symbol(_brk_start), |
222 | _brk_end - _brk_start); | |
5368a2be PA |
223 | |
224 | /* Mark brk area as locked down and no longer taking any | |
225 | new allocations */ | |
226 | _brk_start = 0; | |
227 | } | |
228 | ||
5aa3d718 BP |
229 | u64 relocated_ramdisk; |
230 | ||
cf8fa920 PA |
231 | #ifdef CONFIG_BLK_DEV_INITRD |
232 | ||
a8a51a88 YL |
233 | static u64 __init get_ramdisk_image(void) |
234 | { | |
235 | u64 ramdisk_image = boot_params.hdr.ramdisk_image; | |
236 | ||
ee92d815 YL |
237 | ramdisk_image |= (u64)boot_params.ext_ramdisk_image << 32; |
238 | ||
a8a51a88 YL |
239 | return ramdisk_image; |
240 | } | |
241 | static u64 __init get_ramdisk_size(void) | |
242 | { | |
243 | u64 ramdisk_size = boot_params.hdr.ramdisk_size; | |
244 | ||
ee92d815 YL |
245 | ramdisk_size |= (u64)boot_params.ext_ramdisk_size << 32; |
246 | ||
a8a51a88 YL |
247 | return ramdisk_size; |
248 | } | |
249 | ||
eb1379cb | 250 | static void __init relocate_initrd(void) |
cf8fa920 | 251 | { |
c967da6a | 252 | /* Assume only end is not page aligned */ |
a8a51a88 YL |
253 | u64 ramdisk_image = get_ramdisk_image(); |
254 | u64 ramdisk_size = get_ramdisk_size(); | |
c967da6a | 255 | u64 area_size = PAGE_ALIGN(ramdisk_size); |
cf8fa920 | 256 | |
e8c57d40 | 257 | /* We need to move the initrd down into directly mapped mem */ |
5aa3d718 BP |
258 | relocated_ramdisk = memblock_find_in_range(0, PFN_PHYS(max_pfn_mapped), |
259 | area_size, PAGE_SIZE); | |
cf8fa920 | 260 | |
5aa3d718 | 261 | if (!relocated_ramdisk) |
3945e2c9 | 262 | panic("Cannot find place for new RAMDISK of size %lld\n", |
5aa3d718 | 263 | ramdisk_size); |
3945e2c9 | 264 | |
e8c57d40 | 265 | /* Note: this includes all the mem currently occupied by |
cf8fa920 | 266 | the initrd, we rely on that fact to keep the data intact. */ |
5aa3d718 BP |
267 | memblock_reserve(relocated_ramdisk, area_size); |
268 | initrd_start = relocated_ramdisk + PAGE_OFFSET; | |
cf8fa920 | 269 | initrd_end = initrd_start + ramdisk_size; |
365811d6 | 270 | printk(KERN_INFO "Allocated new RAMDISK: [mem %#010llx-%#010llx]\n", |
5aa3d718 | 271 | relocated_ramdisk, relocated_ramdisk + ramdisk_size - 1); |
cf8fa920 | 272 | |
5dd2c4bd MS |
273 | copy_from_early_mem((void *)initrd_start, ramdisk_image, ramdisk_size); |
274 | ||
365811d6 BH |
275 | printk(KERN_INFO "Move RAMDISK from [mem %#010llx-%#010llx] to" |
276 | " [mem %#010llx-%#010llx]\n", | |
ba5b14cc | 277 | ramdisk_image, ramdisk_image + ramdisk_size - 1, |
5aa3d718 | 278 | relocated_ramdisk, relocated_ramdisk + ramdisk_size - 1); |
eb1379cb | 279 | } |
9a27f5c5 | 280 | |
1b8c78be YL |
281 | static void __init early_reserve_initrd(void) |
282 | { | |
283 | /* Assume only end is not page aligned */ | |
a8a51a88 YL |
284 | u64 ramdisk_image = get_ramdisk_image(); |
285 | u64 ramdisk_size = get_ramdisk_size(); | |
1b8c78be YL |
286 | u64 ramdisk_end = PAGE_ALIGN(ramdisk_image + ramdisk_size); |
287 | ||
288 | if (!boot_params.hdr.type_of_loader || | |
289 | !ramdisk_image || !ramdisk_size) | |
290 | return; /* No initrd provided by bootloader */ | |
291 | ||
292 | memblock_reserve(ramdisk_image, ramdisk_end - ramdisk_image); | |
293 | } | |
eb1379cb YL |
294 | static void __init reserve_initrd(void) |
295 | { | |
c967da6a | 296 | /* Assume only end is not page aligned */ |
a8a51a88 YL |
297 | u64 ramdisk_image = get_ramdisk_image(); |
298 | u64 ramdisk_size = get_ramdisk_size(); | |
c967da6a | 299 | u64 ramdisk_end = PAGE_ALIGN(ramdisk_image + ramdisk_size); |
e8c57d40 | 300 | u64 mapped_size; |
eb1379cb YL |
301 | |
302 | if (!boot_params.hdr.type_of_loader || | |
303 | !ramdisk_image || !ramdisk_size) | |
304 | return; /* No initrd provided by bootloader */ | |
305 | ||
306 | initrd_start = 0; | |
307 | ||
595ad9af | 308 | mapped_size = memblock_mem_size(max_pfn_mapped); |
e8c57d40 | 309 | if (ramdisk_size >= (mapped_size>>1)) |
ab7b64e9 PJ |
310 | panic("initrd too large to handle, " |
311 | "disabling initrd (%lld needed, %lld available)\n", | |
e8c57d40 | 312 | ramdisk_size, mapped_size>>1); |
eb1379cb | 313 | |
365811d6 BH |
314 | printk(KERN_INFO "RAMDISK: [mem %#010llx-%#010llx]\n", ramdisk_image, |
315 | ramdisk_end - 1); | |
eb1379cb | 316 | |
74f27655 | 317 | if (pfn_range_is_mapped(PFN_DOWN(ramdisk_image), |
e8c57d40 YL |
318 | PFN_DOWN(ramdisk_end))) { |
319 | /* All are mapped, easy case */ | |
eb1379cb YL |
320 | initrd_start = ramdisk_image + PAGE_OFFSET; |
321 | initrd_end = initrd_start + ramdisk_size; | |
322 | return; | |
323 | } | |
324 | ||
eb1379cb | 325 | relocate_initrd(); |
8c5dd8f4 | 326 | |
24aa0788 | 327 | memblock_free(ramdisk_image, ramdisk_end - ramdisk_image); |
cf8fa920 | 328 | } |
af06f8b7 | 329 | |
225c37d7 | 330 | #else |
1b8c78be YL |
331 | static void __init early_reserve_initrd(void) |
332 | { | |
333 | } | |
eb1379cb | 334 | static void __init reserve_initrd(void) |
225c37d7 YL |
335 | { |
336 | } | |
cf8fa920 PA |
337 | #endif /* CONFIG_BLK_DEV_INITRD */ |
338 | ||
29f784e3 | 339 | static void __init parse_setup_data(void) |
257b0fde YL |
340 | { |
341 | struct setup_data *data; | |
30e46b57 | 342 | u64 pa_data, pa_next; |
257b0fde | 343 | |
257b0fde YL |
344 | pa_data = boot_params.hdr.setup_data; |
345 | while (pa_data) { | |
7389882c | 346 | u32 data_len, data_type; |
f1c2b357 | 347 | |
7389882c | 348 | data = early_memremap(pa_data, sizeof(*data)); |
f1c2b357 | 349 | data_len = data->len + sizeof(struct setup_data); |
30e46b57 LC |
350 | data_type = data->type; |
351 | pa_next = data->next; | |
8d4a40bc | 352 | early_memunmap(data, sizeof(*data)); |
f1c2b357 | 353 | |
30e46b57 | 354 | switch (data_type) { |
257b0fde | 355 | case SETUP_E820_EXT: |
914053c0 | 356 | e820__memory_setup_extended(pa_data, data_len); |
257b0fde | 357 | break; |
da6b737b SAS |
358 | case SETUP_DTB: |
359 | add_dtb(pa_data); | |
257b0fde | 360 | break; |
1fec0533 DY |
361 | case SETUP_EFI: |
362 | parse_efi_setup(pa_data, data_len); | |
363 | break; | |
257b0fde YL |
364 | default: |
365 | break; | |
366 | } | |
30e46b57 | 367 | pa_data = pa_next; |
257b0fde YL |
368 | } |
369 | } | |
370 | ||
a9ce6bc1 | 371 | static void __init memblock_x86_reserve_range_setup_data(void) |
a0a0becd YL |
372 | { |
373 | struct setup_data *data; | |
374 | u64 pa_data; | |
a0a0becd | 375 | |
a0a0becd YL |
376 | pa_data = boot_params.hdr.setup_data; |
377 | while (pa_data) { | |
88b4c146 | 378 | data = early_memremap(pa_data, sizeof(*data)); |
24aa0788 | 379 | memblock_reserve(pa_data, sizeof(*data) + data->len); |
b3c72fc9 DK |
380 | |
381 | if (data->type == SETUP_INDIRECT && | |
382 | ((struct setup_indirect *)data->data)->type != SETUP_INDIRECT) | |
383 | memblock_reserve(((struct setup_indirect *)data->data)->addr, | |
384 | ((struct setup_indirect *)data->data)->len); | |
385 | ||
a0a0becd | 386 | pa_data = data->next; |
8d4a40bc | 387 | early_memunmap(data, sizeof(*data)); |
a0a0becd YL |
388 | } |
389 | } | |
390 | ||
ccb4defa YL |
391 | /* |
392 | * --------- Crashkernel reservation ------------------------------ | |
393 | */ | |
394 | ||
2965faa5 | 395 | #ifdef CONFIG_KEXEC_CORE |
32105f7f | 396 | |
606134f7 | 397 | /* 16M alignment for crash kernel regions */ |
9ca5c8e6 | 398 | #define CRASH_ALIGN SZ_16M |
606134f7 | 399 | |
7f8595bf | 400 | /* |
8ff80fbe BH |
401 | * Keep the crash kernel below this limit. |
402 | * | |
360db4ac | 403 | * Earlier 32-bits kernels would limit the kernel to the low 512 MB range |
8ff80fbe BH |
404 | * due to mapping restrictions. |
405 | * | |
360db4ac | 406 | * 64-bit kdump kernels need to be restricted to be under 64 TB, which is |
11a98f37 | 407 | * the upper limit of system RAM in 4-level paging mode. Since the kdump |
360db4ac IM |
408 | * jump could be from 5-level paging to 4-level paging, the jump will fail if |
409 | * the kernel is put above 64 TB, and during the 1st kernel bootup there's | |
410 | * no good way to detect the paging mode of the target kernel which will be | |
411 | * loaded for dumping. | |
7f8595bf PA |
412 | */ |
413 | #ifdef CONFIG_X86_32 | |
9ca5c8e6 DY |
414 | # define CRASH_ADDR_LOW_MAX SZ_512M |
415 | # define CRASH_ADDR_HIGH_MAX SZ_512M | |
7f8595bf | 416 | #else |
9ca5c8e6 | 417 | # define CRASH_ADDR_LOW_MAX SZ_4G |
8ff80fbe | 418 | # define CRASH_ADDR_HIGH_MAX SZ_64T |
7f8595bf PA |
419 | #endif |
420 | ||
eb6db83d | 421 | static int __init reserve_crashkernel_low(void) |
0212f915 YL |
422 | { |
423 | #ifdef CONFIG_X86_64 | |
f56d5578 | 424 | unsigned long long base, low_base = 0, low_size = 0; |
0212f915 | 425 | unsigned long total_low_mem; |
0212f915 YL |
426 | int ret; |
427 | ||
97eac21b BP |
428 | total_low_mem = memblock_mem_size(1UL << (32 - PAGE_SHIFT)); |
429 | ||
adbc742b | 430 | /* crashkernel=Y,low */ |
97eac21b | 431 | ret = parse_crashkernel_low(boot_command_line, total_low_mem, &low_size, &base); |
f56d5578 | 432 | if (ret) { |
c729de8f | 433 | /* |
392e879a | 434 | * two parts from kernel/dma/swiotlb.c: |
94fb9334 JR |
435 | * -swiotlb size: user-specified with swiotlb= or default. |
436 | * | |
437 | * -swiotlb overflow buffer: now hardcoded to 32k. We round it | |
438 | * to 8M for other buffers that may need to stay low too. Also | |
439 | * make sure we allocate enough extra low memory so that we | |
440 | * don't run out of DMA buffers for 32-bit devices. | |
c729de8f | 441 | */ |
97eac21b | 442 | low_size = max(swiotlb_size_or_default() + (8UL << 20), 256UL << 20); |
c729de8f | 443 | } else { |
adbc742b | 444 | /* passed with crashkernel=0,low ? */ |
c729de8f | 445 | if (!low_size) |
eb6db83d | 446 | return 0; |
c729de8f | 447 | } |
0212f915 | 448 | |
fe2d48b8 | 449 | low_base = memblock_find_in_range(0, 1ULL << 32, low_size, CRASH_ALIGN); |
0212f915 | 450 | if (!low_base) { |
eb6db83d BH |
451 | pr_err("Cannot reserve %ldMB crashkernel low memory, please try smaller size.\n", |
452 | (unsigned long)(low_size >> 20)); | |
453 | return -ENOMEM; | |
0212f915 | 454 | } |
0212f915 | 455 | |
6f376057 BP |
456 | ret = memblock_reserve(low_base, low_size); |
457 | if (ret) { | |
458 | pr_err("%s: Error reserving crashkernel low memblock.\n", __func__); | |
459 | return ret; | |
0212f915 YL |
460 | } |
461 | ||
0212f915 | 462 | pr_info("Reserving %ldMB of low memory at %ldMB for crashkernel (System low RAM: %ldMB)\n", |
97eac21b BP |
463 | (unsigned long)(low_size >> 20), |
464 | (unsigned long)(low_base >> 20), | |
465 | (unsigned long)(total_low_mem >> 20)); | |
466 | ||
0212f915 YL |
467 | crashk_low_res.start = low_base; |
468 | crashk_low_res.end = low_base + low_size - 1; | |
469 | insert_resource(&iomem_resource, &crashk_low_res); | |
7f8595bf | 470 | #endif |
eb6db83d | 471 | return 0; |
0212f915 | 472 | } |
7f8595bf | 473 | |
29f784e3 | 474 | static void __init reserve_crashkernel(void) |
ccb4defa | 475 | { |
f56d5578 | 476 | unsigned long long crash_size, crash_base, total_mem; |
55a20ee7 | 477 | bool high = false; |
ccb4defa YL |
478 | int ret; |
479 | ||
09c71bfd | 480 | total_mem = memblock_phys_mem_size(); |
ccb4defa | 481 | |
55a20ee7 | 482 | /* crashkernel=XM */ |
97eac21b | 483 | ret = parse_crashkernel(boot_command_line, total_mem, &crash_size, &crash_base); |
55a20ee7 | 484 | if (ret != 0 || crash_size <= 0) { |
adbc742b | 485 | /* crashkernel=X,high */ |
55a20ee7 | 486 | ret = parse_crashkernel_high(boot_command_line, total_mem, |
97eac21b | 487 | &crash_size, &crash_base); |
55a20ee7 YL |
488 | if (ret != 0 || crash_size <= 0) |
489 | return; | |
490 | high = true; | |
491 | } | |
32105f7f | 492 | |
3db3eb28 PT |
493 | if (xen_pv_domain()) { |
494 | pr_info("Ignoring crashkernel for a Xen PV domain\n"); | |
495 | return; | |
496 | } | |
497 | ||
32105f7f | 498 | /* 0 means: find the address automatically */ |
b9ac3849 | 499 | if (!crash_base) { |
9f4c1396 | 500 | /* |
a8d4c824 | 501 | * Set CRASH_ADDR_LOW_MAX upper bound for crash memory, |
b9ac3849 DY |
502 | * crashkernel=x,high reserves memory over 4G, also allocates |
503 | * 256M extra low memory for DMA buffers and swiotlb. | |
504 | * But the extra memory is not required for all machines. | |
505 | * So try low memory first and fall back to high memory | |
506 | * unless "crashkernel=size[KMG],high" is specified. | |
9f4c1396 | 507 | */ |
b9ac3849 DY |
508 | if (!high) |
509 | crash_base = memblock_find_in_range(CRASH_ALIGN, | |
510 | CRASH_ADDR_LOW_MAX, | |
511 | crash_size, CRASH_ALIGN); | |
512 | if (!crash_base) | |
513 | crash_base = memblock_find_in_range(CRASH_ALIGN, | |
514 | CRASH_ADDR_HIGH_MAX, | |
515 | crash_size, CRASH_ALIGN); | |
1f5026a7 | 516 | if (!crash_base) { |
44280733 | 517 | pr_info("crashkernel reservation failed - No suitable area found.\n"); |
ccb4defa YL |
518 | return; |
519 | } | |
32105f7f | 520 | } else { |
44280733 YL |
521 | unsigned long long start; |
522 | ||
9f4c1396 | 523 | start = memblock_find_in_range(crash_base, |
97eac21b BP |
524 | crash_base + crash_size, |
525 | crash_size, 1 << 20); | |
44280733 YL |
526 | if (start != crash_base) { |
527 | pr_info("crashkernel reservation failed - memory is in use.\n"); | |
ccb4defa YL |
528 | return; |
529 | } | |
32105f7f | 530 | } |
6f376057 BP |
531 | ret = memblock_reserve(crash_base, crash_size); |
532 | if (ret) { | |
533 | pr_err("%s: Error reserving crashkernel memblock.\n", __func__); | |
534 | return; | |
535 | } | |
ccb4defa | 536 | |
eb6db83d BH |
537 | if (crash_base >= (1ULL << 32) && reserve_crashkernel_low()) { |
538 | memblock_free(crash_base, crash_size); | |
539 | return; | |
540 | } | |
ccb4defa | 541 | |
f56d5578 BP |
542 | pr_info("Reserving %ldMB of memory at %ldMB for crashkernel (System RAM: %ldMB)\n", |
543 | (unsigned long)(crash_size >> 20), | |
544 | (unsigned long)(crash_base >> 20), | |
545 | (unsigned long)(total_mem >> 20)); | |
ccb4defa | 546 | |
32105f7f BW |
547 | crashk_res.start = crash_base; |
548 | crashk_res.end = crash_base + crash_size - 1; | |
549 | insert_resource(&iomem_resource, &crashk_res); | |
ccb4defa YL |
550 | } |
551 | #else | |
29f784e3 | 552 | static void __init reserve_crashkernel(void) |
ccb4defa YL |
553 | { |
554 | } | |
555 | #endif | |
556 | ||
bdba0e70 YL |
557 | static struct resource standard_io_resources[] = { |
558 | { .name = "dma1", .start = 0x00, .end = 0x1f, | |
559 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
560 | { .name = "pic1", .start = 0x20, .end = 0x21, | |
561 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
562 | { .name = "timer0", .start = 0x40, .end = 0x43, | |
563 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
564 | { .name = "timer1", .start = 0x50, .end = 0x53, | |
565 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
566 | { .name = "keyboard", .start = 0x60, .end = 0x60, | |
567 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
568 | { .name = "keyboard", .start = 0x64, .end = 0x64, | |
569 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
570 | { .name = "dma page reg", .start = 0x80, .end = 0x8f, | |
571 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
572 | { .name = "pic2", .start = 0xa0, .end = 0xa1, | |
573 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
574 | { .name = "dma2", .start = 0xc0, .end = 0xdf, | |
575 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
576 | { .name = "fpu", .start = 0xf0, .end = 0xff, | |
577 | .flags = IORESOURCE_BUSY | IORESOURCE_IO } | |
578 | }; | |
579 | ||
8fee697d | 580 | void __init reserve_standard_io_resources(void) |
bdba0e70 YL |
581 | { |
582 | int i; | |
583 | ||
584 | /* request I/O space for devices used on all i[345]86 PCs */ | |
585 | for (i = 0; i < ARRAY_SIZE(standard_io_resources); i++) | |
586 | request_resource(&ioport_resource, &standard_io_resources[i]); | |
587 | ||
588 | } | |
589 | ||
042be38e YL |
590 | static __init void reserve_ibft_region(void) |
591 | { | |
592 | unsigned long addr, size = 0; | |
593 | ||
594 | addr = find_ibft_region(&size); | |
595 | ||
596 | if (size) | |
24aa0788 | 597 | memblock_reserve(addr, size); |
042be38e YL |
598 | } |
599 | ||
a9acc536 JB |
600 | static bool __init snb_gfx_workaround_needed(void) |
601 | { | |
e43b3cec | 602 | #ifdef CONFIG_PCI |
a9acc536 JB |
603 | int i; |
604 | u16 vendor, devid; | |
ab3cd867 | 605 | static const __initconst u16 snb_ids[] = { |
a9acc536 JB |
606 | 0x0102, |
607 | 0x0112, | |
608 | 0x0122, | |
609 | 0x0106, | |
610 | 0x0116, | |
611 | 0x0126, | |
612 | 0x010a, | |
613 | }; | |
614 | ||
615 | /* Assume no if something weird is going on with PCI */ | |
616 | if (!early_pci_allowed()) | |
617 | return false; | |
618 | ||
619 | vendor = read_pci_config_16(0, 2, 0, PCI_VENDOR_ID); | |
620 | if (vendor != 0x8086) | |
621 | return false; | |
622 | ||
623 | devid = read_pci_config_16(0, 2, 0, PCI_DEVICE_ID); | |
624 | for (i = 0; i < ARRAY_SIZE(snb_ids); i++) | |
625 | if (devid == snb_ids[i]) | |
626 | return true; | |
e43b3cec | 627 | #endif |
a9acc536 JB |
628 | |
629 | return false; | |
630 | } | |
631 | ||
632 | /* | |
633 | * Sandy Bridge graphics has trouble with certain ranges, exclude | |
634 | * them from allocation. | |
635 | */ | |
636 | static void __init trim_snb_memory(void) | |
637 | { | |
ab3cd867 | 638 | static const __initconst unsigned long bad_pages[] = { |
a9acc536 JB |
639 | 0x20050000, |
640 | 0x20110000, | |
641 | 0x20130000, | |
642 | 0x20138000, | |
643 | 0x40004000, | |
644 | }; | |
645 | int i; | |
646 | ||
647 | if (!snb_gfx_workaround_needed()) | |
648 | return; | |
649 | ||
650 | printk(KERN_DEBUG "reserving inaccessible SNB gfx pages\n"); | |
651 | ||
652 | /* | |
653 | * Reserve all memory below the 1 MB mark that has not | |
654 | * already been reserved. | |
655 | */ | |
656 | memblock_reserve(0, 1<<20); | |
657 | ||
658 | for (i = 0; i < ARRAY_SIZE(bad_pages); i++) { | |
659 | if (memblock_reserve(bad_pages[i], PAGE_SIZE)) | |
660 | printk(KERN_WARNING "failed to reserve 0x%08lx\n", | |
661 | bad_pages[i]); | |
662 | } | |
663 | } | |
664 | ||
665 | /* | |
666 | * Here we put platform-specific memory range workarounds, i.e. | |
667 | * memory known to be corrupt or otherwise in need to be reserved on | |
668 | * specific platforms. | |
669 | * | |
670 | * If this gets used more widely it could use a real dispatch mechanism. | |
671 | */ | |
672 | static void __init trim_platform_memory_ranges(void) | |
673 | { | |
674 | trim_snb_memory(); | |
675 | } | |
676 | ||
1b5576e6 YL |
677 | static void __init trim_bios_range(void) |
678 | { | |
679 | /* | |
680 | * A special case is the first 4Kb of memory; | |
681 | * This is a BIOS owned area, not kernel ram, but generally | |
682 | * not listed as such in the E820 table. | |
d0cd7425 PA |
683 | * |
684 | * This typically reserves additional memory (64KiB by default) | |
685 | * since some BIOSes are known to corrupt low memory. See the | |
9ea77bdb | 686 | * Kconfig help text for X86_RESERVE_LOW. |
1b5576e6 | 687 | */ |
09821ff1 | 688 | e820__range_update(0, PAGE_SIZE, E820_TYPE_RAM, E820_TYPE_RESERVED); |
d0cd7425 | 689 | |
1b5576e6 | 690 | /* |
11a98f37 C |
691 | * special case: Some BIOSes report the PC BIOS |
692 | * area (640Kb -> 1Mb) as RAM even though it is not. | |
1b5576e6 YL |
693 | * take them out. |
694 | */ | |
09821ff1 | 695 | e820__range_remove(BIOS_BEGIN, BIOS_END - BIOS_BEGIN, E820_TYPE_RAM, 1); |
a9acc536 | 696 | |
f9748fa0 | 697 | e820__update_table(e820_table); |
1b5576e6 YL |
698 | } |
699 | ||
b422a309 YL |
700 | /* called before trim_bios_range() to spare extra sanitize */ |
701 | static void __init e820_add_kernel_range(void) | |
702 | { | |
703 | u64 start = __pa_symbol(_text); | |
704 | u64 size = __pa_symbol(_end) - start; | |
705 | ||
706 | /* | |
09821ff1 | 707 | * Complain if .text .data and .bss are not marked as E820_TYPE_RAM and |
b422a309 YL |
708 | * attempt to fix it by adding the range. We may have a confused BIOS, |
709 | * or the user may have used memmap=exactmap or memmap=xxM$yyM to | |
710 | * exclude kernel range. If we really are running on top non-RAM, | |
711 | * we will crash later anyways. | |
712 | */ | |
09821ff1 | 713 | if (e820__mapped_all(start, start + size, E820_TYPE_RAM)) |
b422a309 YL |
714 | return; |
715 | ||
09821ff1 IM |
716 | pr_warn(".text .data .bss are not marked as E820_TYPE_RAM!\n"); |
717 | e820__range_remove(start, size, E820_TYPE_RAM, 0); | |
718 | e820__range_add(start, size, E820_TYPE_RAM); | |
b422a309 YL |
719 | } |
720 | ||
95c96084 PA |
721 | static unsigned reserve_low = CONFIG_X86_RESERVE_LOW << 10; |
722 | ||
9ea77bdb PA |
723 | static int __init parse_reservelow(char *p) |
724 | { | |
725 | unsigned long long size; | |
726 | ||
727 | if (!p) | |
728 | return -EINVAL; | |
729 | ||
730 | size = memparse(p, &p); | |
731 | ||
732 | if (size < 4096) | |
733 | size = 4096; | |
734 | ||
735 | if (size > 640*1024) | |
736 | size = 640*1024; | |
737 | ||
738 | reserve_low = size; | |
739 | ||
740 | return 0; | |
741 | } | |
742 | ||
743 | early_param("reservelow", parse_reservelow); | |
744 | ||
95c96084 PA |
745 | static void __init trim_low_memory_range(void) |
746 | { | |
747 | memblock_reserve(0, ALIGN(reserve_low, PAGE_SIZE)); | |
748 | } | |
749 | ||
f32360ef KC |
750 | /* |
751 | * Dump out kernel offset information on panic. | |
752 | */ | |
753 | static int | |
754 | dump_kernel_offset(struct notifier_block *self, unsigned long v, void *p) | |
755 | { | |
78cac48c BP |
756 | if (kaslr_enabled()) { |
757 | pr_emerg("Kernel Offset: 0x%lx from 0x%lx (relocation range: 0x%lx-0x%lx)\n", | |
4545c898 | 758 | kaslr_offset(), |
78cac48c BP |
759 | __START_KERNEL, |
760 | __START_KERNEL_map, | |
761 | MODULES_VADDR-1); | |
762 | } else { | |
763 | pr_emerg("Kernel Offset: disabled\n"); | |
764 | } | |
f32360ef KC |
765 | |
766 | return 0; | |
767 | } | |
768 | ||
1da177e4 LT |
769 | /* |
770 | * Determine if we were loaded by an EFI loader. If so, then we have also been | |
771 | * passed the efi memmap, systab, etc., so we should use these data structures | |
772 | * for initialization. Note, the efi init code path is determined by the | |
773 | * global efi_enabled. This allows the same kernel image to be used on existing | |
774 | * systems (with a traditional BIOS) as well as on EFI systems. | |
775 | */ | |
76934ed4 YL |
776 | /* |
777 | * setup_arch - architecture-specific boot-time initializations | |
778 | * | |
779 | * Note: On x86_64, fixmaps are ready for use even before this is called. | |
780 | */ | |
781 | ||
1da177e4 LT |
782 | void __init setup_arch(char **cmdline_p) |
783 | { | |
c603a309 TL |
784 | /* |
785 | * Reserve the memory occupied by the kernel between _text and | |
786 | * __end_of_kernel_reserve symbols. Any kernel sections after the | |
787 | * __end_of_kernel_reserve symbol must be explicitly reserved with a | |
788 | * separate memblock_reserve() or they will be discarded. | |
789 | */ | |
6c902b65 | 790 | memblock_reserve(__pa_symbol(_text), |
c603a309 | 791 | (unsigned long)__end_of_kernel_reserve - (unsigned long)_text); |
6c902b65 | 792 | |
10a70416 AK |
793 | /* |
794 | * Make sure page 0 is always reserved because on systems with | |
795 | * L1TF its contents can be leaked to user processes. | |
796 | */ | |
797 | memblock_reserve(0, PAGE_SIZE); | |
798 | ||
1b8c78be YL |
799 | early_reserve_initrd(); |
800 | ||
6c902b65 YL |
801 | /* |
802 | * At this point everything still needed from the boot loader | |
803 | * or BIOS or kernel text should be early reserved or marked not | |
804 | * RAM in e820. All other memory is free game. | |
805 | */ | |
806 | ||
76934ed4 | 807 | #ifdef CONFIG_X86_32 |
1da177e4 | 808 | memcpy(&boot_cpu_data, &new_cpu_data, sizeof(new_cpu_data)); |
b40827fa BP |
809 | |
810 | /* | |
811 | * copy kernel address range established so far and switch | |
812 | * to the proper swapper page table | |
813 | */ | |
814 | clone_pgd_range(swapper_pg_dir + KERNEL_PGD_BOUNDARY, | |
815 | initial_page_table + KERNEL_PGD_BOUNDARY, | |
816 | KERNEL_PGD_PTRS); | |
817 | ||
818 | load_cr3(swapper_pg_dir); | |
2075244f BD |
819 | /* |
820 | * Note: Quark X1000 CPUs advertise PGE incorrectly and require | |
821 | * a cr3 based tlb flush, so the following __flush_tlb_all() | |
360db4ac | 822 | * will not flush anything because the CPU quirk which clears |
2075244f BD |
823 | * X86_FEATURE_PGE has not been invoked yet. Though due to the |
824 | * load_cr3() above the TLB has been flushed already. The | |
825 | * quirk is invoked before subsequent calls to __flush_tlb_all() | |
826 | * so proper operation is guaranteed. | |
827 | */ | |
b40827fa | 828 | __flush_tlb_all(); |
76934ed4 YL |
829 | #else |
830 | printk(KERN_INFO "Command line: %s\n", boot_command_line); | |
162434e7 | 831 | boot_cpu_data.x86_phys_bits = MAX_PHYSMEM_BITS; |
76934ed4 | 832 | #endif |
1da177e4 | 833 | |
9863c90f AK |
834 | /* |
835 | * If we have OLPC OFW, we might end up relocating the fixmap due to | |
836 | * reserve_top(), so do this before touching the ioremap area. | |
837 | */ | |
fd699c76 AS |
838 | olpc_ofw_detect(); |
839 | ||
433f8924 | 840 | idt_setup_early_traps(); |
9e882c92 | 841 | early_cpu_init(); |
8990cac6 PT |
842 | arch_init_ideal_nops(); |
843 | jump_label_init(); | |
1a98fd14 JF |
844 | early_ioremap_init(); |
845 | ||
fd699c76 AS |
846 | setup_olpc_ofw_pgd(); |
847 | ||
30c82645 PA |
848 | ROOT_DEV = old_decode_dev(boot_params.hdr.root_dev); |
849 | screen_info = boot_params.screen_info; | |
850 | edid_info = boot_params.edid_info; | |
76934ed4 | 851 | #ifdef CONFIG_X86_32 |
30c82645 PA |
852 | apm_info.bios = boot_params.apm_bios_info; |
853 | ist_info = boot_params.ist_info; | |
76934ed4 YL |
854 | #endif |
855 | saved_video_mode = boot_params.hdr.vid_mode; | |
30c82645 | 856 | bootloader_type = boot_params.hdr.type_of_loader; |
5031296c PA |
857 | if ((bootloader_type >> 4) == 0xe) { |
858 | bootloader_type &= 0xf; | |
859 | bootloader_type |= (boot_params.hdr.ext_loader_type+0x10) << 4; | |
860 | } | |
861 | bootloader_version = bootloader_type & 0xf; | |
862 | bootloader_version |= boot_params.hdr.ext_loader_ver << 4; | |
1da177e4 LT |
863 | |
864 | #ifdef CONFIG_BLK_DEV_RAM | |
30c82645 PA |
865 | rd_image_start = boot_params.hdr.ram_size & RAMDISK_IMAGE_START_MASK; |
866 | rd_prompt = ((boot_params.hdr.ram_size & RAMDISK_PROMPT_FLAG) != 0); | |
867 | rd_doload = ((boot_params.hdr.ram_size & RAMDISK_LOAD_FLAG) != 0); | |
1da177e4 | 868 | #endif |
7465252e YL |
869 | #ifdef CONFIG_EFI |
870 | if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature, | |
9402973d | 871 | EFI32_LOADER_SIGNATURE, 4)) { |
3e909599 | 872 | set_bit(EFI_BOOT, &efi.flags); |
1adbfa35 | 873 | } else if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature, |
9402973d | 874 | EFI64_LOADER_SIGNATURE, 4)) { |
3e909599 MF |
875 | set_bit(EFI_BOOT, &efi.flags); |
876 | set_bit(EFI_64BIT, &efi.flags); | |
7465252e YL |
877 | } |
878 | #endif | |
879 | ||
42bbdb43 | 880 | x86_init.oem.arch_setup(); |
2215e69d | 881 | |
419afdf5 | 882 | iomem_resource.end = (1ULL << boot_cpu_data.x86_phys_bits) - 1; |
103e2063 | 883 | e820__memory_setup(); |
28bb2237 YL |
884 | parse_setup_data(); |
885 | ||
1da177e4 LT |
886 | copy_edd(); |
887 | ||
30c82645 | 888 | if (!boot_params.hdr.root_flags) |
1da177e4 LT |
889 | root_mountflags &= ~MS_RDONLY; |
890 | init_mm.start_code = (unsigned long) _text; | |
891 | init_mm.end_code = (unsigned long) _etext; | |
892 | init_mm.end_data = (unsigned long) _edata; | |
93dbda7c | 893 | init_mm.brk = _brk_end; |
fe3d197f DH |
894 | |
895 | mpx_mm_init(&init_mm); | |
1da177e4 | 896 | |
4046d6e8 LT |
897 | code_resource.start = __pa_symbol(_text); |
898 | code_resource.end = __pa_symbol(_etext)-1; | |
a3299754 KC |
899 | rodata_resource.start = __pa_symbol(__start_rodata); |
900 | rodata_resource.end = __pa_symbol(__end_rodata)-1; | |
901 | data_resource.start = __pa_symbol(_sdata); | |
4046d6e8 LT |
902 | data_resource.end = __pa_symbol(_edata)-1; |
903 | bss_resource.start = __pa_symbol(__bss_start); | |
904 | bss_resource.end = __pa_symbol(__bss_stop)-1; | |
905 | ||
516cbf37 TB |
906 | #ifdef CONFIG_CMDLINE_BOOL |
907 | #ifdef CONFIG_CMDLINE_OVERRIDE | |
908 | strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE); | |
909 | #else | |
910 | if (builtin_cmdline[0]) { | |
911 | /* append boot loader cmdline to builtin */ | |
912 | strlcat(builtin_cmdline, " ", COMMAND_LINE_SIZE); | |
913 | strlcat(builtin_cmdline, boot_command_line, COMMAND_LINE_SIZE); | |
914 | strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE); | |
915 | } | |
916 | #endif | |
917 | #endif | |
918 | ||
eda6da92 YL |
919 | strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE); |
920 | *cmdline_p = command_line; | |
921 | ||
eda6da92 | 922 | /* |
4b0f3b81 KC |
923 | * x86_configure_nx() is called before parse_early_param() to detect |
924 | * whether hardware doesn't support NX (so that the early EHCI debug | |
925 | * console setup can safely call set_fixmap()). It may then be called | |
926 | * again from within noexec_setup() during parsing early parameters | |
927 | * to honor the respective command line option. | |
eda6da92 | 928 | */ |
4763ed4d | 929 | x86_configure_nx(); |
eda6da92 YL |
930 | |
931 | parse_early_param(); | |
932 | ||
835bcec5 DY |
933 | if (efi_enabled(EFI_BOOT)) |
934 | efi_memblock_x86_reserve_range(); | |
39fa104d RA |
935 | #ifdef CONFIG_MEMORY_HOTPLUG |
936 | /* | |
937 | * Memory used by the kernel cannot be hot-removed because Linux | |
938 | * cannot migrate the kernel pages. When memory hotplug is | |
939 | * enabled, we should prevent memblock from allocating memory | |
940 | * for the kernel. | |
941 | * | |
942 | * ACPI SRAT records all hotpluggable memory ranges. But before | |
943 | * SRAT is parsed, we don't know about it. | |
944 | * | |
945 | * The kernel image is loaded into memory at very early time. We | |
946 | * cannot prevent this anyway. So on NUMA system, we set any | |
947 | * node the kernel resides in as un-hotpluggable. | |
948 | * | |
949 | * Since on modern servers, one node could have double-digit | |
950 | * gigabytes memory, we can assume the memory around the kernel | |
951 | * image is also un-hotpluggable. So before SRAT is parsed, just | |
952 | * allocate memory near the kernel image to try the best to keep | |
953 | * the kernel away from hotpluggable memory. | |
954 | */ | |
955 | if (movable_node_is_enabled()) | |
956 | memblock_set_bottom_up(true); | |
957 | #endif | |
958 | ||
4b0f3b81 | 959 | x86_report_nx(); |
0ad5bce7 | 960 | |
28bb2237 | 961 | /* after early param, so could get panic from serial */ |
a9ce6bc1 | 962 | memblock_x86_reserve_range_setup_data(); |
28bb2237 | 963 | |
76934ed4 | 964 | if (acpi_mps_check()) { |
3eb11edc | 965 | #ifdef CONFIG_X86_LOCAL_APIC |
76934ed4 | 966 | disable_apic = 1; |
3eb11edc | 967 | #endif |
988781dc | 968 | setup_clear_cpu_cap(X86_FEATURE_APIC); |
3c999f14 YL |
969 | } |
970 | ||
1a127034 | 971 | e820__reserve_setup_data(); |
9641bdaf | 972 | e820__finish_early_params(); |
1a3f239d | 973 | |
83e68189 | 974 | if (efi_enabled(EFI_BOOT)) |
ff0c0874 BM |
975 | efi_init(); |
976 | ||
0fca0812 | 977 | dmi_setup(); |
2216d199 | 978 | |
88b094fb AK |
979 | /* |
980 | * VMware detection requires dmi to be available, so this | |
0fca0812 | 981 | * needs to be done after dmi_setup(), for the boot CPU. |
88b094fb | 982 | */ |
2d826404 | 983 | init_hypervisor_platform(); |
88b094fb | 984 | |
cf7a63ef | 985 | tsc_early_init(); |
f7cf5a5b | 986 | x86_init.resources.probe_roms(); |
41c094fd | 987 | |
4046d6e8 LT |
988 | /* after parse_early_param, so could debug it */ |
989 | insert_resource(&iomem_resource, &code_resource); | |
a3299754 | 990 | insert_resource(&iomem_resource, &rodata_resource); |
4046d6e8 LT |
991 | insert_resource(&iomem_resource, &data_resource); |
992 | insert_resource(&iomem_resource, &bss_resource); | |
993 | ||
b422a309 | 994 | e820_add_kernel_range(); |
1b5576e6 | 995 | trim_bios_range(); |
76934ed4 | 996 | #ifdef CONFIG_X86_32 |
cc9f7a0c | 997 | if (ppro_with_ram_bug()) { |
09821ff1 IM |
998 | e820__range_update(0x70000000ULL, 0x40000ULL, E820_TYPE_RAM, |
999 | E820_TYPE_RESERVED); | |
f9748fa0 | 1000 | e820__update_table(e820_table); |
cc9f7a0c | 1001 | printk(KERN_INFO "fixed physical RAM map:\n"); |
be0c3f0f | 1002 | e820__print_table("bad_ppro"); |
cc9f7a0c | 1003 | } |
76934ed4 YL |
1004 | #else |
1005 | early_gart_iommu_check(); | |
1006 | #endif | |
cc9f7a0c | 1007 | |
7b2a0a6c YL |
1008 | /* |
1009 | * partially used pages are not usable - thus | |
1010 | * we are rounding upwards: | |
1011 | */ | |
0c6fc11a | 1012 | max_pfn = e820__end_of_ram_pfn(); |
7b2a0a6c | 1013 | |
093af8d7 YL |
1014 | /* update e820 for memory not covered by WB MTRRs */ |
1015 | mtrr_bp_init(); | |
2dc807b3 | 1016 | if (mtrr_trim_uncached_memory(max_pfn)) |
0c6fc11a | 1017 | max_pfn = e820__end_of_ram_pfn(); |
76c32418 | 1018 | |
8dd33030 IM |
1019 | max_possible_pfn = max_pfn; |
1020 | ||
99c13b8c MP |
1021 | /* |
1022 | * This call is required when the CPU does not support PAT. If | |
1023 | * mtrr_bp_init() invoked it already via pat_init() the call has no | |
1024 | * effect. | |
1025 | */ | |
1026 | init_cache_modes(); | |
1027 | ||
c7d2361f TG |
1028 | /* |
1029 | * Define random base addresses for memory sections after max_pfn is | |
1030 | * defined and before each memory section base is used. | |
1031 | */ | |
1032 | kernel_randomize_memory(); | |
1033 | ||
76934ed4 | 1034 | #ifdef CONFIG_X86_32 |
4e29684c | 1035 | /* max_low_pfn get updated here */ |
2ec65f8b | 1036 | find_low_pfn_range(); |
76934ed4 | 1037 | #else |
06cd9a7d | 1038 | check_x2apic(); |
76934ed4 YL |
1039 | |
1040 | /* How many end-of-memory variables you have, grandma! */ | |
1041 | /* need this before calling reserve_initrd */ | |
f361a450 | 1042 | if (max_pfn > (1UL<<(32 - PAGE_SHIFT))) |
0c6fc11a | 1043 | max_low_pfn = e820__end_of_low_ram_pfn(); |
f361a450 YL |
1044 | else |
1045 | max_low_pfn = max_pfn; | |
1046 | ||
76934ed4 | 1047 | high_memory = (void *)__va(max_pfn * PAGE_SIZE - 1) + 1; |
5394f80f JF |
1048 | #endif |
1049 | ||
893f38d1 YL |
1050 | /* |
1051 | * Find and reserve possible boot-time SMP configuration: | |
1052 | */ | |
1053 | find_smp_config(); | |
1054 | ||
042be38e YL |
1055 | reserve_ibft_region(); |
1056 | ||
8d57470d YL |
1057 | early_alloc_pgt_buf(); |
1058 | ||
72d7c3b3 | 1059 | /* |
4918e228 | 1060 | * Need to conclude brk, before e820__memblock_setup() |
72d7c3b3 YL |
1061 | * it could use memblock_find_in_range, could overlap with |
1062 | * brk area. | |
1063 | */ | |
1064 | reserve_brk(); | |
1065 | ||
e5f15b45 YL |
1066 | cleanup_highmap(); |
1067 | ||
2449f343 | 1068 | memblock_set_current_limit(ISA_END_ADDRESS); |
4918e228 | 1069 | e820__memblock_setup(); |
72d7c3b3 | 1070 | |
4971531a MF |
1071 | reserve_bios_regions(); |
1072 | ||
6950e31b DW |
1073 | efi_fake_memmap(); |
1074 | efi_find_mirror(); | |
1075 | efi_esrt_init(); | |
007b7560 | 1076 | |
6950e31b DW |
1077 | /* |
1078 | * The EFI specification says that boot service code won't be | |
1079 | * called after ExitBootServices(). This is, in fact, a lie. | |
1080 | */ | |
1081 | efi_reserve_boot_services(); | |
916f676f | 1082 | |
72d7c3b3 | 1083 | /* preallocate 4k for mptable mpc */ |
5da217ca | 1084 | e820__memblock_alloc_reserved_mpc_new(); |
72d7c3b3 YL |
1085 | |
1086 | #ifdef CONFIG_X86_CHECK_BIOS_CORRUPTION | |
1087 | setup_bios_corruption_check(); | |
1088 | #endif | |
1089 | ||
10054230 | 1090 | #ifdef CONFIG_X86_32 |
365811d6 BH |
1091 | printk(KERN_DEBUG "initial memory mapped: [mem 0x00000000-%#010lx]\n", |
1092 | (max_pfn_mapped<<PAGE_SHIFT) - 1); | |
10054230 | 1093 | #endif |
72d7c3b3 | 1094 | |
4f7b9226 | 1095 | reserve_real_mode(); |
893f38d1 | 1096 | |
a9acc536 | 1097 | trim_platform_memory_ranges(); |
95c96084 | 1098 | trim_low_memory_range(); |
a9acc536 | 1099 | |
22ddfcaa | 1100 | init_mem_mapping(); |
1bbbbe77 | 1101 | |
433f8924 | 1102 | idt_setup_early_pf(); |
1bbbbe77 | 1103 | |
18bc7bd5 AL |
1104 | /* |
1105 | * Update mmu_cr4_features (and, indirectly, trampoline_cr4_features) | |
1106 | * with the current CR4 value. This may not be necessary, but | |
1107 | * auditing all the early-boot CR4 manipulation would be needed to | |
1108 | * rule it out. | |
c7ad5ad2 AL |
1109 | * |
1110 | * Mask off features that don't work outside long mode (just | |
1111 | * PCIDE for now). | |
18bc7bd5 | 1112 | */ |
c7ad5ad2 | 1113 | mmu_cr4_features = __read_cr4() & ~X86_CR4_PCIDE; |
18bc7bd5 | 1114 | |
4ce7a869 | 1115 | memblock_set_current_limit(get_max_mapped()); |
4e29684c | 1116 | |
e7b37895 YL |
1117 | /* |
1118 | * NOTE: On x86-32, only from this point on, fixmaps are ready for use. | |
1119 | */ | |
1120 | ||
1121 | #ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT | |
1122 | if (init_ohci1394_dma_early) | |
1123 | init_ohci1394_dma_on_all_controllers(); | |
1124 | #endif | |
162a7e75 MT |
1125 | /* Allocate bigger log buffer */ |
1126 | setup_log_buf(1); | |
e7b37895 | 1127 | |
9661b332 DH |
1128 | if (efi_enabled(EFI_BOOT)) { |
1129 | switch (boot_params.secure_boot) { | |
1130 | case efi_secureboot_mode_disabled: | |
1131 | pr_info("Secure boot disabled\n"); | |
1132 | break; | |
1133 | case efi_secureboot_mode_enabled: | |
1134 | pr_info("Secure boot enabled\n"); | |
1135 | break; | |
1136 | default: | |
1137 | pr_info("Secure boot could not be determined\n"); | |
1138 | break; | |
1139 | } | |
1140 | } | |
1141 | ||
2ec65f8b YL |
1142 | reserve_initrd(); |
1143 | ||
da3d3f98 | 1144 | acpi_table_upgrade(); |
53aac44c | 1145 | |
76934ed4 | 1146 | vsmp_init(); |
76934ed4 | 1147 | |
1c6e5503 YL |
1148 | io_delay_init(); |
1149 | ||
630b3aff LW |
1150 | early_platform_quirks(); |
1151 | ||
1c6e5503 YL |
1152 | /* |
1153 | * Parse the ACPI tables for possible boot-time SMP configuration. | |
1154 | */ | |
20e6926d YL |
1155 | acpi_boot_table_init(); |
1156 | ||
1157 | early_acpi_boot_init(); | |
1158 | ||
d8fc3afc | 1159 | initmem_init(); |
3c325f82 | 1160 | dma_contiguous_reserve(max_pfn_mapped << PAGE_SHIFT); |
fa591c4a TC |
1161 | |
1162 | /* | |
1163 | * Reserve memory for crash kernel after SRAT is parsed so that it | |
1164 | * won't consume hotpluggable memory. | |
1165 | */ | |
1166 | reserve_crashkernel(); | |
1167 | ||
6f2a7536 | 1168 | memblock_find_dma_reserve(); |
91467bdf | 1169 | |
ccb64941 BO |
1170 | if (!early_xdbc_setup_hardware()) |
1171 | early_xdbc_register_console(); | |
1172 | ||
7737b215 | 1173 | x86_init.paging.pagetable_init(); |
f212ec4b | 1174 | |
ef7f0d6a AR |
1175 | kasan_init(); |
1176 | ||
d2b6dc61 | 1177 | /* |
945fd17a TG |
1178 | * Sync back kernel address range. |
1179 | * | |
1180 | * FIXME: Can the later sync in setup_cpu_entry_areas() replace | |
1181 | * this call? | |
d2b6dc61 | 1182 | */ |
945fd17a | 1183 | sync_initial_page_table(); |
d2b6dc61 | 1184 | |
31625340 JC |
1185 | tboot_probe(); |
1186 | ||
76934ed4 | 1187 | map_vsyscall(); |
76934ed4 | 1188 | |
1a3f239d | 1189 | generic_apic_probe(); |
1da177e4 | 1190 | |
54ef3400 | 1191 | early_quirks(); |
d44647b0 | 1192 | |
295deae4 YL |
1193 | /* |
1194 | * Read APIC and some other early information from ACPI tables. | |
1195 | */ | |
1da177e4 | 1196 | acpi_boot_init(); |
efafc8b2 | 1197 | sfi_init(); |
a906fdaa | 1198 | x86_dtb_init(); |
04606618 | 1199 | |
295deae4 YL |
1200 | /* |
1201 | * get boot-time SMP configuration: | |
1202 | */ | |
a91bf718 | 1203 | get_smp_config(); |
76934ed4 | 1204 | |
1e90a13d TG |
1205 | /* |
1206 | * Systems w/o ACPI and mptables might not have it mapped the local | |
1207 | * APIC yet, but prefill_possible_map() might need to access it. | |
1208 | */ | |
1209 | init_apic_mappings(); | |
1210 | ||
329513a3 | 1211 | prefill_possible_map(); |
301e6190 | 1212 | |
5f4765f9 | 1213 | init_cpu_to_node(); |
5f4765f9 | 1214 | |
ca1b8862 | 1215 | io_apic_init_mappings(); |
9d6a4d08 | 1216 | |
f3614646 | 1217 | x86_init.hyper.guest_late_init(); |
1da177e4 | 1218 | |
1506c8dc | 1219 | e820__reserve_resources(); |
cc55f753 | 1220 | e820__register_nosave_regions(max_pfn); |
1da177e4 | 1221 | |
8fee697d | 1222 | x86_init.resources.reserve_resources(); |
41c094fd | 1223 | |
2df908ba | 1224 | e820__setup_pci_gap(); |
41c094fd | 1225 | |
1da177e4 LT |
1226 | #ifdef CONFIG_VT |
1227 | #if defined(CONFIG_VGA_CONSOLE) | |
83e68189 | 1228 | if (!efi_enabled(EFI_BOOT) || (efi_mem_type(0xa0000) != EFI_CONVENTIONAL_MEMORY)) |
1da177e4 LT |
1229 | conswitchp = &vga_con; |
1230 | #elif defined(CONFIG_DUMMY_CONSOLE) | |
1231 | conswitchp = &dummy_con; | |
1232 | #endif | |
1233 | #endif | |
6f30c1ac | 1234 | x86_init.oem.banner(); |
a2202aa2 | 1235 | |
6b617e22 FT |
1236 | x86_init.timers.wallclock_init(); |
1237 | ||
a2202aa2 | 1238 | mcheck_init(); |
f49aa448 | 1239 | |
b3c869d3 | 1240 | register_refined_jiffies(CLOCK_TICK_RATE); |
5189c2a7 OJ |
1241 | |
1242 | #ifdef CONFIG_EFI | |
a5d90c92 BP |
1243 | if (efi_enabled(EFI_BOOT)) |
1244 | efi_apply_memmap_quirks(); | |
5189c2a7 | 1245 | #endif |
ee9f8fce JP |
1246 | |
1247 | unwind_init(); | |
1da177e4 | 1248 | } |
5649b7c3 | 1249 | |
9be1b56a IM |
1250 | #ifdef CONFIG_X86_32 |
1251 | ||
8fee697d TG |
1252 | static struct resource video_ram_resource = { |
1253 | .name = "Video RAM area", | |
1254 | .start = 0xa0000, | |
1255 | .end = 0xbffff, | |
1256 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM | |
9be1b56a IM |
1257 | }; |
1258 | ||
8fee697d | 1259 | void __init i386_reserve_resources(void) |
9be1b56a | 1260 | { |
8fee697d TG |
1261 | request_resource(&iomem_resource, &video_ram_resource); |
1262 | reserve_standard_io_resources(); | |
9be1b56a IM |
1263 | } |
1264 | ||
9be1b56a | 1265 | #endif /* CONFIG_X86_32 */ |
f32360ef KC |
1266 | |
1267 | static struct notifier_block kernel_offset_notifier = { | |
1268 | .notifier_call = dump_kernel_offset | |
1269 | }; | |
1270 | ||
1271 | static int __init register_kernel_offset_dumper(void) | |
1272 | { | |
1273 | atomic_notifier_chain_register(&panic_notifier_list, | |
1274 | &kernel_offset_notifier); | |
1275 | return 0; | |
1276 | } | |
1277 | __initcall(register_kernel_offset_dumper); |