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Commit | Line | Data |
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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
c767a54b JP |
2 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
3 | ||
186f4360 | 4 | #include <linux/export.h> |
cd6ed525 | 5 | #include <linux/reboot.h> |
4d022e35 MB |
6 | #include <linux/init.h> |
7 | #include <linux/pm.h> | |
8 | #include <linux/efi.h> | |
6c6c51e4 | 9 | #include <linux/dmi.h> |
d43c36dc | 10 | #include <linux/sched.h> |
69575d38 | 11 | #include <linux/tboot.h> |
ca444564 | 12 | #include <linux/delay.h> |
c207aee4 | 13 | #include <linux/frame.h> |
65fddcfc | 14 | #include <linux/pgtable.h> |
4d022e35 MB |
15 | #include <acpi/reboot.h> |
16 | #include <asm/io.h> | |
1da177e4 | 17 | #include <asm/apic.h> |
8643e28d | 18 | #include <asm/io_apic.h> |
4d37e7e3 | 19 | #include <asm/desc.h> |
4d022e35 | 20 | #include <asm/hpet.h> |
4412620f | 21 | #include <asm/proto.h> |
973efae2 | 22 | #include <asm/reboot_fixups.h> |
07f3331c | 23 | #include <asm/reboot.h> |
82487711 | 24 | #include <asm/pci_x86.h> |
d176720d | 25 | #include <asm/virtext.h> |
96b89dc6 | 26 | #include <asm/cpu.h> |
c410b830 | 27 | #include <asm/nmi.h> |
65051397 | 28 | #include <asm/smp.h> |
1da177e4 | 29 | |
65051397 PA |
30 | #include <linux/ctype.h> |
31 | #include <linux/mc146818rtc.h> | |
32 | #include <asm/realmode.h> | |
33 | #include <asm/x86_init.h> | |
44be28e9 | 34 | #include <asm/efi.h> |
4d022e35 | 35 | |
1da177e4 LT |
36 | /* |
37 | * Power off function, if any | |
38 | */ | |
39 | void (*pm_power_off)(void); | |
129f6946 | 40 | EXPORT_SYMBOL(pm_power_off); |
1da177e4 | 41 | |
144d102b ML |
42 | /* |
43 | * This is set if we need to go through the 'emergency' path. | |
d176720d EH |
44 | * When machine_emergency_restart() is called, we may be on |
45 | * an inconsistent state and won't be able to do a clean cleanup | |
46 | */ | |
47 | static int reboot_emergency; | |
48 | ||
14d7ca5c PA |
49 | /* This is set by the PCI code if either type 1 or type 2 PCI is detected */ |
50 | bool port_cf9_safe = false; | |
51 | ||
1da177e4 LT |
52 | /* |
53 | * Reboot options and system auto-detection code provided by | |
54 | * Dell Inc. so their systems "just work". :-) | |
55 | */ | |
56 | ||
4d581259 AH |
57 | /* |
58 | * Some machines require the "reboot=a" commandline options | |
59 | */ | |
60 | static int __init set_acpi_reboot(const struct dmi_system_id *d) | |
61 | { | |
62 | if (reboot_type != BOOT_ACPI) { | |
63 | reboot_type = BOOT_ACPI; | |
64 | pr_info("%s series board detected. Selecting %s-method for reboots.\n", | |
65 | d->ident, "ACPI"); | |
66 | } | |
67 | return 0; | |
68 | } | |
69 | ||
1da177e4 | 70 | /* |
1ef03890 | 71 | * Some machines require the "reboot=b" or "reboot=k" commandline options, |
4d022e35 | 72 | * this quirk makes that automatic. |
1da177e4 | 73 | */ |
1855256c | 74 | static int __init set_bios_reboot(const struct dmi_system_id *d) |
1da177e4 | 75 | { |
4d022e35 MB |
76 | if (reboot_type != BOOT_BIOS) { |
77 | reboot_type = BOOT_BIOS; | |
c767a54b | 78 | pr_info("%s series board detected. Selecting %s-method for reboots.\n", |
6d9153bb | 79 | d->ident, "BIOS"); |
1da177e4 LT |
80 | } |
81 | return 0; | |
82 | } | |
83 | ||
0082517f JHP |
84 | /* |
85 | * Some machines don't handle the default ACPI reboot method and | |
86 | * require the EFI reboot method: | |
87 | */ | |
88 | static int __init set_efi_reboot(const struct dmi_system_id *d) | |
89 | { | |
90 | if (reboot_type != BOOT_EFI && !efi_runtime_disabled()) { | |
91 | reboot_type = BOOT_EFI; | |
92 | pr_info("%s series board detected. Selecting EFI-method for reboot.\n", d->ident); | |
93 | } | |
94 | return 0; | |
95 | } | |
96 | ||
65051397 | 97 | void __noreturn machine_real_restart(unsigned int type) |
57b16594 | 98 | { |
57b16594 ML |
99 | local_irq_disable(); |
100 | ||
144d102b ML |
101 | /* |
102 | * Write zero to CMOS register number 0x0f, which the BIOS POST | |
103 | * routine will recognize as telling it to do a proper reboot. (Well | |
104 | * that's what this book in front of me says -- it may only apply to | |
105 | * the Phoenix BIOS though, it's not clear). At the same time, | |
106 | * disable NMIs by setting the top bit in the CMOS address register, | |
107 | * as we're about to do peculiar things to the CPU. I'm not sure if | |
108 | * `outb_p' is needed instead of just `outb'. Use it to be on the | |
109 | * safe side. (Yes, CMOS_WRITE does outb_p's. - Paul G.) | |
57b16594 ML |
110 | */ |
111 | spin_lock(&rtc_lock); | |
112 | CMOS_WRITE(0x00, 0x8f); | |
113 | spin_unlock(&rtc_lock); | |
114 | ||
115 | /* | |
116 | * Switch back to the initial page table. | |
117 | */ | |
65051397 | 118 | #ifdef CONFIG_X86_32 |
57b16594 | 119 | load_cr3(initial_page_table); |
65051397 PA |
120 | #else |
121 | write_cr3(real_mode_header->trampoline_pgd); | |
924c6b90 AL |
122 | |
123 | /* Exiting long mode will fail if CR4.PCIDE is set. */ | |
67e87d43 | 124 | if (boot_cpu_has(X86_FEATURE_PCID)) |
924c6b90 | 125 | cr4_clear_bits(X86_CR4_PCIDE); |
65051397 | 126 | #endif |
57b16594 | 127 | |
57b16594 | 128 | /* Jump to the identity-mapped low memory code */ |
65051397 PA |
129 | #ifdef CONFIG_X86_32 |
130 | asm volatile("jmpl *%0" : : | |
131 | "rm" (real_mode_header->machine_real_restart_asm), | |
132 | "a" (type)); | |
133 | #else | |
134 | asm volatile("ljmpl *%0" : : | |
135 | "m" (real_mode_header->machine_real_restart_asm), | |
136 | "D" (type)); | |
137 | #endif | |
138 | unreachable(); | |
57b16594 ML |
139 | } |
140 | #ifdef CONFIG_APM_MODULE | |
141 | EXPORT_SYMBOL(machine_real_restart); | |
142 | #endif | |
c207aee4 | 143 | STACK_FRAME_NON_STANDARD(machine_real_restart); |
57b16594 | 144 | |
57b16594 ML |
145 | /* |
146 | * Some Apple MacBook and MacBookPro's needs reboot=p to be able to reboot | |
147 | */ | |
148 | static int __init set_pci_reboot(const struct dmi_system_id *d) | |
149 | { | |
5be44a6f IM |
150 | if (reboot_type != BOOT_CF9_FORCE) { |
151 | reboot_type = BOOT_CF9_FORCE; | |
c767a54b | 152 | pr_info("%s series board detected. Selecting %s-method for reboots.\n", |
6d9153bb | 153 | d->ident, "PCI"); |
57b16594 ML |
154 | } |
155 | return 0; | |
156 | } | |
157 | ||
1ef03890 PC |
158 | static int __init set_kbd_reboot(const struct dmi_system_id *d) |
159 | { | |
160 | if (reboot_type != BOOT_KBD) { | |
161 | reboot_type = BOOT_KBD; | |
c767a54b | 162 | pr_info("%s series board detected. Selecting %s-method for reboot.\n", |
6d9153bb | 163 | d->ident, "KBD"); |
1ef03890 PC |
164 | } |
165 | return 0; | |
166 | } | |
167 | ||
144d102b | 168 | /* |
65051397 | 169 | * This is a single dmi_table handling all reboot quirks. |
57b16594 | 170 | */ |
6faadbbb | 171 | static const struct dmi_system_id reboot_dmi_table[] __initconst = { |
e56e57f6 DJ |
172 | |
173 | /* Acer */ | |
174 | { /* Handle reboot issue on Acer Aspire one */ | |
175 | .callback = set_kbd_reboot, | |
176 | .ident = "Acer Aspire One A110", | |
b9e82af8 | 177 | .matches = { |
e56e57f6 DJ |
178 | DMI_MATCH(DMI_SYS_VENDOR, "Acer"), |
179 | DMI_MATCH(DMI_PRODUCT_NAME, "AOA110"), | |
b9e82af8 TG |
180 | }, |
181 | }, | |
0082517f JHP |
182 | { /* Handle reboot issue on Acer TravelMate X514-51T */ |
183 | .callback = set_efi_reboot, | |
184 | .ident = "Acer TravelMate X514-51T", | |
185 | .matches = { | |
186 | DMI_MATCH(DMI_SYS_VENDOR, "Acer"), | |
187 | DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate X514-51T"), | |
188 | }, | |
189 | }, | |
e56e57f6 DJ |
190 | |
191 | /* Apple */ | |
192 | { /* Handle problems with rebooting on Apple MacBook5 */ | |
193 | .callback = set_pci_reboot, | |
194 | .ident = "Apple MacBook5", | |
1da177e4 | 195 | .matches = { |
e56e57f6 DJ |
196 | DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), |
197 | DMI_MATCH(DMI_PRODUCT_NAME, "MacBook5"), | |
1da177e4 LT |
198 | }, |
199 | }, | |
140fd4ac HM |
200 | { /* Handle problems with rebooting on Apple MacBook6,1 */ |
201 | .callback = set_pci_reboot, | |
202 | .ident = "Apple MacBook6,1", | |
203 | .matches = { | |
204 | DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), | |
205 | DMI_MATCH(DMI_PRODUCT_NAME, "MacBook6,1"), | |
206 | }, | |
207 | }, | |
e56e57f6 DJ |
208 | { /* Handle problems with rebooting on Apple MacBookPro5 */ |
209 | .callback = set_pci_reboot, | |
210 | .ident = "Apple MacBookPro5", | |
1da177e4 | 211 | .matches = { |
e56e57f6 DJ |
212 | DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), |
213 | DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro5"), | |
1da177e4 LT |
214 | }, |
215 | }, | |
e56e57f6 DJ |
216 | { /* Handle problems with rebooting on Apple Macmini3,1 */ |
217 | .callback = set_pci_reboot, | |
218 | .ident = "Apple Macmini3,1", | |
df2edcf3 | 219 | .matches = { |
e56e57f6 DJ |
220 | DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), |
221 | DMI_MATCH(DMI_PRODUCT_NAME, "Macmini3,1"), | |
df2edcf3 JJ |
222 | }, |
223 | }, | |
e56e57f6 DJ |
224 | { /* Handle problems with rebooting on the iMac9,1. */ |
225 | .callback = set_pci_reboot, | |
226 | .ident = "Apple iMac9,1", | |
fc115bf1 | 227 | .matches = { |
e56e57f6 DJ |
228 | DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), |
229 | DMI_MATCH(DMI_PRODUCT_NAME, "iMac9,1"), | |
fc115bf1 CK |
230 | }, |
231 | }, | |
2f0c0b2d MK |
232 | { /* Handle problems with rebooting on the iMac10,1. */ |
233 | .callback = set_pci_reboot, | |
234 | .ident = "Apple iMac10,1", | |
235 | .matches = { | |
236 | DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), | |
237 | DMI_MATCH(DMI_PRODUCT_NAME, "iMac10,1"), | |
238 | }, | |
239 | }, | |
e56e57f6 | 240 | |
80313b30 SLH |
241 | /* ASRock */ |
242 | { /* Handle problems with rebooting on ASRock Q1900DC-ITX */ | |
243 | .callback = set_pci_reboot, | |
244 | .ident = "ASRock Q1900DC-ITX", | |
245 | .matches = { | |
246 | DMI_MATCH(DMI_BOARD_VENDOR, "ASRock"), | |
247 | DMI_MATCH(DMI_BOARD_NAME, "Q1900DC-ITX"), | |
248 | }, | |
249 | }, | |
250 | ||
e56e57f6 DJ |
251 | /* ASUS */ |
252 | { /* Handle problems with rebooting on ASUS P4S800 */ | |
fc1c8925 | 253 | .callback = set_bios_reboot, |
e56e57f6 | 254 | .ident = "ASUS P4S800", |
fc1c8925 | 255 | .matches = { |
e56e57f6 DJ |
256 | DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), |
257 | DMI_MATCH(DMI_BOARD_NAME, "P4S800"), | |
fc1c8925 HAA |
258 | }, |
259 | }, | |
90b28ded MH |
260 | { /* Handle problems with rebooting on ASUS EeeBook X205TA */ |
261 | .callback = set_acpi_reboot, | |
262 | .ident = "ASUS EeeBook X205TA", | |
263 | .matches = { | |
264 | DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), | |
bba8376a | 265 | DMI_MATCH(DMI_PRODUCT_NAME, "X205TA"), |
90b28ded MH |
266 | }, |
267 | }, | |
3b3e7855 MH |
268 | { /* Handle problems with rebooting on ASUS EeeBook X205TAW */ |
269 | .callback = set_acpi_reboot, | |
270 | .ident = "ASUS EeeBook X205TAW", | |
271 | .matches = { | |
272 | DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), | |
273 | DMI_MATCH(DMI_PRODUCT_NAME, "X205TAW"), | |
274 | }, | |
275 | }, | |
e56e57f6 | 276 | |
aadca6fa CG |
277 | /* Certec */ |
278 | { /* Handle problems with rebooting on Certec BPC600 */ | |
279 | .callback = set_pci_reboot, | |
280 | .ident = "Certec BPC600", | |
281 | .matches = { | |
282 | DMI_MATCH(DMI_SYS_VENDOR, "Certec"), | |
283 | DMI_MATCH(DMI_PRODUCT_NAME, "BPC600"), | |
284 | }, | |
285 | }, | |
286 | ||
e56e57f6 DJ |
287 | /* Dell */ |
288 | { /* Handle problems with rebooting on Dell DXP061 */ | |
093bac15 | 289 | .callback = set_bios_reboot, |
e56e57f6 | 290 | .ident = "Dell DXP061", |
093bac15 SC |
291 | .matches = { |
292 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
e56e57f6 | 293 | DMI_MATCH(DMI_PRODUCT_NAME, "Dell DXP061"), |
093bac15 SC |
294 | }, |
295 | }, | |
e56e57f6 | 296 | { /* Handle problems with rebooting on Dell E520's */ |
4a4aca64 | 297 | .callback = set_bios_reboot, |
e56e57f6 | 298 | .ident = "Dell E520", |
4a4aca64 JD |
299 | .matches = { |
300 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
e56e57f6 | 301 | DMI_MATCH(DMI_PRODUCT_NAME, "Dell DM061"), |
4a4aca64 JD |
302 | }, |
303 | }, | |
986189f9 LT |
304 | { /* Handle problems with rebooting on the Latitude E5410. */ |
305 | .callback = set_pci_reboot, | |
306 | .ident = "Dell Latitude E5410", | |
35ea63d7 LO |
307 | .matches = { |
308 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
986189f9 | 309 | DMI_MATCH(DMI_PRODUCT_NAME, "Latitude E5410"), |
35ea63d7 LO |
310 | }, |
311 | }, | |
e56e57f6 DJ |
312 | { /* Handle problems with rebooting on the Latitude E5420. */ |
313 | .callback = set_pci_reboot, | |
314 | .ident = "Dell Latitude E5420", | |
1da177e4 | 315 | .matches = { |
35ea63d7 | 316 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
e56e57f6 | 317 | DMI_MATCH(DMI_PRODUCT_NAME, "Latitude E5420"), |
1da177e4 LT |
318 | }, |
319 | }, | |
e56e57f6 DJ |
320 | { /* Handle problems with rebooting on the Latitude E6320. */ |
321 | .callback = set_pci_reboot, | |
322 | .ident = "Dell Latitude E6320", | |
fab3b58d IM |
323 | .matches = { |
324 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
e56e57f6 | 325 | DMI_MATCH(DMI_PRODUCT_NAME, "Latitude E6320"), |
fab3b58d IM |
326 | }, |
327 | }, | |
e56e57f6 DJ |
328 | { /* Handle problems with rebooting on the Latitude E6420. */ |
329 | .callback = set_pci_reboot, | |
330 | .ident = "Dell Latitude E6420", | |
890ffedc TB |
331 | .matches = { |
332 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
e56e57f6 | 333 | DMI_MATCH(DMI_PRODUCT_NAME, "Latitude E6420"), |
890ffedc TB |
334 | }, |
335 | }, | |
e56e57f6 | 336 | { /* Handle problems with rebooting on Dell Optiplex 330 with 0KP561 */ |
d91b14c4 | 337 | .callback = set_bios_reboot, |
e56e57f6 | 338 | .ident = "Dell OptiPlex 330", |
d91b14c4 | 339 | .matches = { |
890ffedc | 340 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
e56e57f6 DJ |
341 | DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 330"), |
342 | DMI_MATCH(DMI_BOARD_NAME, "0KP561"), | |
d91b14c4 TV |
343 | }, |
344 | }, | |
e56e57f6 | 345 | { /* Handle problems with rebooting on Dell Optiplex 360 with 0T656F */ |
dd4124a8 | 346 | .callback = set_bios_reboot, |
e56e57f6 | 347 | .ident = "Dell OptiPlex 360", |
dd4124a8 LO |
348 | .matches = { |
349 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
e56e57f6 DJ |
350 | DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 360"), |
351 | DMI_MATCH(DMI_BOARD_NAME, "0T656F"), | |
dd4124a8 LO |
352 | }, |
353 | }, | |
e56e57f6 | 354 | { /* Handle problems with rebooting on Dell Optiplex 745's SFF */ |
c5da9a2b | 355 | .callback = set_bios_reboot, |
e56e57f6 | 356 | .ident = "Dell OptiPlex 745", |
c5da9a2b AC |
357 | .matches = { |
358 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
e56e57f6 | 359 | DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 745"), |
c5da9a2b AC |
360 | }, |
361 | }, | |
e56e57f6 | 362 | { /* Handle problems with rebooting on Dell Optiplex 745's DFF */ |
88dff493 | 363 | .callback = set_bios_reboot, |
e56e57f6 | 364 | .ident = "Dell OptiPlex 745", |
88dff493 | 365 | .matches = { |
c5da9a2b | 366 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
e56e57f6 DJ |
367 | DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 745"), |
368 | DMI_MATCH(DMI_BOARD_NAME, "0MM599"), | |
88dff493 ZR |
369 | }, |
370 | }, | |
e56e57f6 | 371 | { /* Handle problems with rebooting on Dell Optiplex 745 with 0KW626 */ |
4832ddda | 372 | .callback = set_bios_reboot, |
e56e57f6 | 373 | .ident = "Dell OptiPlex 745", |
b49c78d4 | 374 | .matches = { |
e56e57f6 DJ |
375 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
376 | DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 745"), | |
377 | DMI_MATCH(DMI_BOARD_NAME, "0KW626"), | |
b49c78d4 PC |
378 | }, |
379 | }, | |
e56e57f6 | 380 | { /* Handle problems with rebooting on Dell OptiPlex 760 with 0G919G */ |
4832ddda | 381 | .callback = set_bios_reboot, |
e56e57f6 | 382 | .ident = "Dell OptiPlex 760", |
6c6c51e4 | 383 | .matches = { |
e56e57f6 DJ |
384 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
385 | DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 760"), | |
386 | DMI_MATCH(DMI_BOARD_NAME, "0G919G"), | |
6c6c51e4 PM |
387 | }, |
388 | }, | |
e56e57f6 | 389 | { /* Handle problems with rebooting on the OptiPlex 990. */ |
498cdbfb | 390 | .callback = set_pci_reboot, |
e56e57f6 | 391 | .ident = "Dell OptiPlex 990", |
498cdbfb | 392 | .matches = { |
e56e57f6 DJ |
393 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
394 | DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 990"), | |
498cdbfb OÇ |
395 | }, |
396 | }, | |
e56e57f6 DJ |
397 | { /* Handle problems with rebooting on Dell 300's */ |
398 | .callback = set_bios_reboot, | |
399 | .ident = "Dell PowerEdge 300", | |
05154752 | 400 | .matches = { |
e56e57f6 DJ |
401 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"), |
402 | DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge 300/"), | |
05154752 GH |
403 | }, |
404 | }, | |
e56e57f6 DJ |
405 | { /* Handle problems with rebooting on Dell 1300's */ |
406 | .callback = set_bios_reboot, | |
407 | .ident = "Dell PowerEdge 1300", | |
0a832320 | 408 | .matches = { |
e56e57f6 DJ |
409 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"), |
410 | DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge 1300/"), | |
0a832320 JM |
411 | }, |
412 | }, | |
e56e57f6 DJ |
413 | { /* Handle problems with rebooting on Dell 2400's */ |
414 | .callback = set_bios_reboot, | |
415 | .ident = "Dell PowerEdge 2400", | |
3628c3f5 | 416 | .matches = { |
e56e57f6 DJ |
417 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"), |
418 | DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge 2400"), | |
3628c3f5 MR |
419 | }, |
420 | }, | |
e56e57f6 | 421 | { /* Handle problems with rebooting on the Dell PowerEdge C6100. */ |
8412da75 | 422 | .callback = set_pci_reboot, |
e56e57f6 | 423 | .ident = "Dell PowerEdge C6100", |
8412da75 | 424 | .matches = { |
e56e57f6 DJ |
425 | DMI_MATCH(DMI_SYS_VENDOR, "Dell"), |
426 | DMI_MATCH(DMI_PRODUCT_NAME, "C6100"), | |
8412da75 VS |
427 | }, |
428 | }, | |
e56e57f6 | 429 | { /* Handle problems with rebooting on the Precision M6600. */ |
b7798d28 | 430 | .callback = set_pci_reboot, |
e56e57f6 | 431 | .ident = "Dell Precision M6600", |
b7798d28 DB |
432 | .matches = { |
433 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
e56e57f6 | 434 | DMI_MATCH(DMI_PRODUCT_NAME, "Precision M6600"), |
b7798d28 DB |
435 | }, |
436 | }, | |
e56e57f6 DJ |
437 | { /* Handle problems with rebooting on Dell T5400's */ |
438 | .callback = set_bios_reboot, | |
439 | .ident = "Dell Precision T5400", | |
a536877e PA |
440 | .matches = { |
441 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
e56e57f6 | 442 | DMI_MATCH(DMI_PRODUCT_NAME, "Precision WorkStation T5400"), |
a536877e PA |
443 | }, |
444 | }, | |
e56e57f6 DJ |
445 | { /* Handle problems with rebooting on Dell T7400's */ |
446 | .callback = set_bios_reboot, | |
447 | .ident = "Dell Precision T7400", | |
6be30bb7 RW |
448 | .matches = { |
449 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
e56e57f6 | 450 | DMI_MATCH(DMI_PRODUCT_NAME, "Precision WorkStation T7400"), |
6be30bb7 RW |
451 | }, |
452 | }, | |
e56e57f6 DJ |
453 | { /* Handle problems with rebooting on Dell XPS710 */ |
454 | .callback = set_bios_reboot, | |
455 | .ident = "Dell XPS710", | |
76eb9a30 ZR |
456 | .matches = { |
457 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
e56e57f6 | 458 | DMI_MATCH(DMI_PRODUCT_NAME, "Dell XPS710"), |
76eb9a30 ZR |
459 | }, |
460 | }, | |
4d581259 AH |
461 | { /* Handle problems with rebooting on Dell Optiplex 7450 AIO */ |
462 | .callback = set_acpi_reboot, | |
463 | .ident = "Dell OptiPlex 7450 AIO", | |
464 | .matches = { | |
465 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
466 | DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 7450 AIO"), | |
467 | }, | |
468 | }, | |
e56e57f6 DJ |
469 | |
470 | /* Hewlett-Packard */ | |
471 | { /* Handle problems with rebooting on HP laptops */ | |
472 | .callback = set_bios_reboot, | |
473 | .ident = "HP Compaq Laptop", | |
4f0acd31 | 474 | .matches = { |
e56e57f6 DJ |
475 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), |
476 | DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq"), | |
4f0acd31 MS |
477 | }, |
478 | }, | |
e56e57f6 DJ |
479 | |
480 | /* Sony */ | |
481 | { /* Handle problems with rebooting on Sony VGN-Z540N */ | |
482 | .callback = set_bios_reboot, | |
483 | .ident = "Sony VGN-Z540N", | |
4f0acd31 | 484 | .matches = { |
e56e57f6 DJ |
485 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), |
486 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-Z540N"), | |
4f0acd31 MS |
487 | }, |
488 | }, | |
e56e57f6 | 489 | |
6c6c51e4 PM |
490 | { } |
491 | }; | |
492 | ||
57b16594 | 493 | static int __init reboot_init(void) |
6c6c51e4 | 494 | { |
44be28e9 MF |
495 | int rv; |
496 | ||
144d102b ML |
497 | /* |
498 | * Only do the DMI check if reboot_type hasn't been overridden | |
5955633e ML |
499 | * on the command line |
500 | */ | |
44be28e9 MF |
501 | if (!reboot_default) |
502 | return 0; | |
503 | ||
504 | /* | |
505 | * The DMI quirks table takes precedence. If no quirks entry | |
4ecf7191 SA |
506 | * matches and the ACPI Hardware Reduced bit is set and EFI |
507 | * runtime services are enabled, force EFI reboot. | |
44be28e9 MF |
508 | */ |
509 | rv = dmi_check_system(reboot_dmi_table); | |
510 | ||
4ecf7191 | 511 | if (!rv && efi_reboot_required() && !efi_runtime_disabled()) |
44be28e9 MF |
512 | reboot_type = BOOT_EFI; |
513 | ||
6c6c51e4 PM |
514 | return 0; |
515 | } | |
57b16594 | 516 | core_initcall(reboot_init); |
6c6c51e4 | 517 | |
4d022e35 MB |
518 | static inline void kb_wait(void) |
519 | { | |
520 | int i; | |
521 | ||
c84d6af8 AC |
522 | for (i = 0; i < 0x10000; i++) { |
523 | if ((inb(0x64) & 0x02) == 0) | |
4d022e35 | 524 | break; |
c84d6af8 AC |
525 | udelay(2); |
526 | } | |
4d022e35 MB |
527 | } |
528 | ||
9c48f1c6 | 529 | static void vmxoff_nmi(int cpu, struct pt_regs *regs) |
d176720d EH |
530 | { |
531 | cpu_emergency_vmxoff(); | |
532 | } | |
533 | ||
144d102b | 534 | /* Use NMIs as IPIs to tell all CPUs to disable virtualization */ |
d176720d EH |
535 | static void emergency_vmx_disable_all(void) |
536 | { | |
537 | /* Just make sure we won't change CPUs while doing this */ | |
538 | local_irq_disable(); | |
539 | ||
144d102b ML |
540 | /* |
541 | * We need to disable VMX on all CPUs before rebooting, otherwise | |
4d1d0977 | 542 | * we risk hanging up the machine, because the CPU ignores INIT |
d176720d EH |
543 | * signals when VMX is enabled. |
544 | * | |
545 | * We can't take any locks and we may be on an inconsistent | |
546 | * state, so we use NMIs as IPIs to tell the other CPUs to disable | |
547 | * VMX and halt. | |
548 | * | |
549 | * For safety, we will avoid running the nmi_shootdown_cpus() | |
550 | * stuff unnecessarily, but we don't have a way to check | |
551 | * if other CPUs have VMX enabled. So we will call it only if the | |
552 | * CPU we are running on has VMX enabled. | |
553 | * | |
554 | * We will miss cases where VMX is not enabled on all CPUs. This | |
555 | * shouldn't do much harm because KVM always enable VMX on all | |
556 | * CPUs anyway. But we can miss it on the small window where KVM | |
557 | * is still enabling VMX. | |
558 | */ | |
559 | if (cpu_has_vmx() && cpu_vmx_enabled()) { | |
144d102b | 560 | /* Disable VMX on this CPU. */ |
d176720d EH |
561 | cpu_vmxoff(); |
562 | ||
563 | /* Halt and disable VMX on the other CPUs */ | |
564 | nmi_shootdown_cpus(vmxoff_nmi); | |
565 | ||
566 | } | |
567 | } | |
568 | ||
569 | ||
7432d149 IM |
570 | void __attribute__((weak)) mach_reboot_fixups(void) |
571 | { | |
572 | } | |
573 | ||
660e34ce | 574 | /* |
5be44a6f IM |
575 | * To the best of our knowledge Windows compatible x86 hardware expects |
576 | * the following on reboot: | |
660e34ce MG |
577 | * |
578 | * 1) If the FADT has the ACPI reboot register flag set, try it | |
579 | * 2) If still alive, write to the keyboard controller | |
580 | * 3) If still alive, write to the ACPI reboot register again | |
581 | * 4) If still alive, write to the keyboard controller again | |
a4f1987e | 582 | * 5) If still alive, call the EFI runtime service to reboot |
5be44a6f | 583 | * 6) If no EFI runtime service, call the BIOS to do a reboot |
660e34ce | 584 | * |
5be44a6f IM |
585 | * We default to following the same pattern. We also have |
586 | * two other reboot methods: 'triple fault' and 'PCI', which | |
587 | * can be triggered via the reboot= kernel boot option or | |
588 | * via quirks. | |
589 | * | |
590 | * This means that this function can never return, it can misbehave | |
591 | * by not rebooting properly and hanging. | |
660e34ce | 592 | */ |
416e2d63 | 593 | static void native_machine_emergency_restart(void) |
1da177e4 | 594 | { |
4d022e35 | 595 | int i; |
660e34ce MG |
596 | int attempt = 0; |
597 | int orig_reboot_type = reboot_type; | |
edf2b139 | 598 | unsigned short mode; |
4d022e35 | 599 | |
d176720d EH |
600 | if (reboot_emergency) |
601 | emergency_vmx_disable_all(); | |
602 | ||
840c2baf JC |
603 | tboot_shutdown(TB_SHUTDOWN_REBOOT); |
604 | ||
4d022e35 | 605 | /* Tell the BIOS if we want cold or warm reboot */ |
edf2b139 RH |
606 | mode = reboot_mode == REBOOT_WARM ? 0x1234 : 0; |
607 | *((unsigned short *)__va(0x472)) = mode; | |
4d022e35 | 608 | |
87615a34 MF |
609 | /* |
610 | * If an EFI capsule has been registered with the firmware then | |
611 | * override the reboot= parameter. | |
612 | */ | |
613 | if (efi_capsule_pending(NULL)) { | |
614 | pr_info("EFI capsule is pending, forcing EFI reboot.\n"); | |
615 | reboot_type = BOOT_EFI; | |
616 | } | |
617 | ||
4d022e35 MB |
618 | for (;;) { |
619 | /* Could also try the reset bit in the Hammer NB */ | |
620 | switch (reboot_type) { | |
5be44a6f IM |
621 | case BOOT_ACPI: |
622 | acpi_reboot(); | |
623 | reboot_type = BOOT_KBD; | |
624 | break; | |
625 | ||
4d022e35 | 626 | case BOOT_KBD: |
144d102b | 627 | mach_reboot_fixups(); /* For board specific fixups */ |
7432d149 | 628 | |
4d022e35 MB |
629 | for (i = 0; i < 10; i++) { |
630 | kb_wait(); | |
631 | udelay(50); | |
144d102b | 632 | outb(0xfe, 0x64); /* Pulse reset low */ |
4d022e35 MB |
633 | udelay(50); |
634 | } | |
660e34ce MG |
635 | if (attempt == 0 && orig_reboot_type == BOOT_ACPI) { |
636 | attempt = 1; | |
637 | reboot_type = BOOT_ACPI; | |
638 | } else { | |
a4f1987e | 639 | reboot_type = BOOT_EFI; |
660e34ce MG |
640 | } |
641 | break; | |
4d022e35 | 642 | |
4d022e35 | 643 | case BOOT_EFI: |
8562c99c | 644 | efi_reboot(reboot_mode, NULL); |
5be44a6f IM |
645 | reboot_type = BOOT_BIOS; |
646 | break; | |
647 | ||
648 | case BOOT_BIOS: | |
649 | machine_real_restart(MRR_BIOS); | |
650 | ||
651 | /* We're probably dead after this, but... */ | |
652 | reboot_type = BOOT_CF9_SAFE; | |
14d7ca5c | 653 | break; |
4d022e35 | 654 | |
5be44a6f | 655 | case BOOT_CF9_FORCE: |
14d7ca5c | 656 | port_cf9_safe = true; |
df561f66 | 657 | fallthrough; |
4d022e35 | 658 | |
5be44a6f | 659 | case BOOT_CF9_SAFE: |
14d7ca5c | 660 | if (port_cf9_safe) { |
5be44a6f | 661 | u8 reboot_code = reboot_mode == REBOOT_WARM ? 0x06 : 0x0E; |
16c21ae5 | 662 | u8 cf9 = inb(0xcf9) & ~reboot_code; |
14d7ca5c PA |
663 | outb(cf9|2, 0xcf9); /* Request hard reset */ |
664 | udelay(50); | |
16c21ae5 LF |
665 | /* Actually do the reset */ |
666 | outb(cf9|reboot_code, 0xcf9); | |
14d7ca5c PA |
667 | udelay(50); |
668 | } | |
5be44a6f IM |
669 | reboot_type = BOOT_TRIPLE; |
670 | break; | |
671 | ||
672 | case BOOT_TRIPLE: | |
e802a51e | 673 | idt_invalidate(NULL); |
5be44a6f IM |
674 | __asm__ __volatile__("int3"); |
675 | ||
676 | /* We're probably dead after this, but... */ | |
677 | reboot_type = BOOT_KBD; | |
4d022e35 MB |
678 | break; |
679 | } | |
680 | } | |
681 | } | |
682 | ||
3c62c625 | 683 | void native_machine_shutdown(void) |
4d022e35 MB |
684 | { |
685 | /* Stop the cpus and apics */ | |
522e6646 | 686 | #ifdef CONFIG_X86_IO_APIC |
2885432a FY |
687 | /* |
688 | * Disabling IO APIC before local APIC is a workaround for | |
689 | * erratum AVR31 in "Intel Atom Processor C2000 Product Family | |
690 | * Specification Update". In this situation, interrupts that target | |
691 | * a Logical Processor whose Local APIC is either in the process of | |
692 | * being hardware disabled or software disabled are neither delivered | |
693 | * nor discarded. When this erratum occurs, the processor may hang. | |
694 | * | |
695 | * Even without the erratum, it still makes sense to quiet IO APIC | |
696 | * before disabling Local APIC. | |
697 | */ | |
339b2ae0 | 698 | clear_IO_APIC(); |
522e6646 FY |
699 | #endif |
700 | ||
1da177e4 | 701 | #ifdef CONFIG_SMP |
144d102b | 702 | /* |
1b3a5d02 RH |
703 | * Stop all of the others. Also disable the local irq to |
704 | * not receive the per-cpu timer interrupt which may trigger | |
705 | * scheduler's load balance. | |
1da177e4 | 706 | */ |
55c844a4 | 707 | local_irq_disable(); |
76fac077 | 708 | stop_other_cpus(); |
4d022e35 | 709 | #endif |
1da177e4 LT |
710 | |
711 | lapic_shutdown(); | |
339b2ae0 | 712 | restore_boot_irq_mode(); |
1da177e4 | 713 | |
c86c7fbc OH |
714 | #ifdef CONFIG_HPET_TIMER |
715 | hpet_disable(); | |
716 | #endif | |
dd2a1305 | 717 | |
4d022e35 | 718 | #ifdef CONFIG_X86_64 |
338bac52 | 719 | x86_platform.iommu_shutdown(); |
4d022e35 | 720 | #endif |
973efae2 JF |
721 | } |
722 | ||
d176720d EH |
723 | static void __machine_emergency_restart(int emergency) |
724 | { | |
725 | reboot_emergency = emergency; | |
726 | machine_ops.emergency_restart(); | |
727 | } | |
728 | ||
416e2d63 | 729 | static void native_machine_restart(char *__unused) |
dd2a1305 | 730 | { |
c767a54b | 731 | pr_notice("machine restart\n"); |
1da177e4 | 732 | |
4d022e35 MB |
733 | if (!reboot_force) |
734 | machine_shutdown(); | |
d176720d | 735 | __machine_emergency_restart(0); |
4a1421f8 EB |
736 | } |
737 | ||
416e2d63 | 738 | static void native_machine_halt(void) |
1da177e4 | 739 | { |
144d102b | 740 | /* Stop other cpus and apics */ |
d3ec5cae IV |
741 | machine_shutdown(); |
742 | ||
840c2baf JC |
743 | tboot_shutdown(TB_SHUTDOWN_HALT); |
744 | ||
d3ec5cae | 745 | stop_this_cpu(NULL); |
1da177e4 LT |
746 | } |
747 | ||
416e2d63 | 748 | static void native_machine_power_off(void) |
1da177e4 | 749 | { |
6e3fbee5 | 750 | if (pm_power_off) { |
4d022e35 MB |
751 | if (!reboot_force) |
752 | machine_shutdown(); | |
1da177e4 | 753 | pm_power_off(); |
6e3fbee5 | 754 | } |
144d102b | 755 | /* A fallback in case there is no PM info available */ |
840c2baf | 756 | tboot_shutdown(TB_SHUTDOWN_HALT); |
1da177e4 LT |
757 | } |
758 | ||
404f6aac | 759 | struct machine_ops machine_ops __ro_after_init = { |
416e2d63 JB |
760 | .power_off = native_machine_power_off, |
761 | .shutdown = native_machine_shutdown, | |
762 | .emergency_restart = native_machine_emergency_restart, | |
763 | .restart = native_machine_restart, | |
ed23dc6f | 764 | .halt = native_machine_halt, |
2965faa5 | 765 | #ifdef CONFIG_KEXEC_CORE |
ed23dc6f GC |
766 | .crash_shutdown = native_machine_crash_shutdown, |
767 | #endif | |
07f3331c | 768 | }; |
416e2d63 JB |
769 | |
770 | void machine_power_off(void) | |
771 | { | |
772 | machine_ops.power_off(); | |
773 | } | |
774 | ||
775 | void machine_shutdown(void) | |
776 | { | |
777 | machine_ops.shutdown(); | |
778 | } | |
779 | ||
780 | void machine_emergency_restart(void) | |
781 | { | |
d176720d | 782 | __machine_emergency_restart(1); |
416e2d63 JB |
783 | } |
784 | ||
785 | void machine_restart(char *cmd) | |
786 | { | |
787 | machine_ops.restart(cmd); | |
788 | } | |
789 | ||
790 | void machine_halt(void) | |
791 | { | |
792 | machine_ops.halt(); | |
793 | } | |
794 | ||
2965faa5 | 795 | #ifdef CONFIG_KEXEC_CORE |
ed23dc6f GC |
796 | void machine_crash_shutdown(struct pt_regs *regs) |
797 | { | |
798 | machine_ops.crash_shutdown(regs); | |
799 | } | |
800 | #endif | |
2ddded21 EH |
801 | |
802 | ||
5bc32950 XP |
803 | /* This is the CPU performing the emergency shutdown work. */ |
804 | int crashing_cpu = -1; | |
805 | ||
bb8dd270 | 806 | #if defined(CONFIG_SMP) |
2ddded21 | 807 | |
2ddded21 EH |
808 | static nmi_shootdown_cb shootdown_callback; |
809 | ||
810 | static atomic_t waiting_for_crash_ipi; | |
58c5661f | 811 | static int crash_ipi_issued; |
2ddded21 | 812 | |
9c48f1c6 | 813 | static int crash_nmi_callback(unsigned int val, struct pt_regs *regs) |
2ddded21 EH |
814 | { |
815 | int cpu; | |
816 | ||
2ddded21 EH |
817 | cpu = raw_smp_processor_id(); |
818 | ||
144d102b ML |
819 | /* |
820 | * Don't do anything if this handler is invoked on crashing cpu. | |
2ddded21 EH |
821 | * Otherwise, system will completely hang. Crashing cpu can get |
822 | * an NMI if system was initially booted with nmi_watchdog parameter. | |
823 | */ | |
824 | if (cpu == crashing_cpu) | |
9c48f1c6 | 825 | return NMI_HANDLED; |
2ddded21 EH |
826 | local_irq_disable(); |
827 | ||
9c48f1c6 | 828 | shootdown_callback(cpu, regs); |
2ddded21 EH |
829 | |
830 | atomic_dec(&waiting_for_crash_ipi); | |
831 | /* Assume hlt works */ | |
832 | halt(); | |
833 | for (;;) | |
834 | cpu_relax(); | |
835 | ||
9c48f1c6 | 836 | return NMI_HANDLED; |
2ddded21 EH |
837 | } |
838 | ||
144d102b ML |
839 | /* |
840 | * Halt all other CPUs, calling the specified function on each of them | |
bb8dd270 EH |
841 | * |
842 | * This function can be used to halt all other CPUs on crash | |
843 | * or emergency reboot time. The function passed as parameter | |
844 | * will be called inside a NMI handler on all CPUs. | |
845 | */ | |
2ddded21 EH |
846 | void nmi_shootdown_cpus(nmi_shootdown_cb callback) |
847 | { | |
848 | unsigned long msecs; | |
c415b3dc | 849 | local_irq_disable(); |
2ddded21 | 850 | |
144d102b | 851 | /* Make a note of crashing cpu. Will be used in NMI callback. */ |
2ddded21 EH |
852 | crashing_cpu = safe_smp_processor_id(); |
853 | ||
854 | shootdown_callback = callback; | |
855 | ||
856 | atomic_set(&waiting_for_crash_ipi, num_online_cpus() - 1); | |
857 | /* Would it be better to replace the trap vector here? */ | |
9c48f1c6 DZ |
858 | if (register_nmi_handler(NMI_LOCAL, crash_nmi_callback, |
859 | NMI_FLAG_FIRST, "crash")) | |
144d102b ML |
860 | return; /* Return what? */ |
861 | /* | |
862 | * Ensure the new callback function is set before sending | |
2ddded21 EH |
863 | * out the NMI |
864 | */ | |
865 | wmb(); | |
866 | ||
22ca7ee9 | 867 | apic_send_IPI_allbutself(NMI_VECTOR); |
2ddded21 | 868 | |
58c5661f HK |
869 | /* Kick CPUs looping in NMI context. */ |
870 | WRITE_ONCE(crash_ipi_issued, 1); | |
871 | ||
2ddded21 EH |
872 | msecs = 1000; /* Wait at most a second for the other cpus to stop */ |
873 | while ((atomic_read(&waiting_for_crash_ipi) > 0) && msecs) { | |
874 | mdelay(1); | |
875 | msecs--; | |
876 | } | |
877 | ||
878 | /* Leave the nmi callback set */ | |
879 | } | |
58c5661f | 880 | |
b279d67d HK |
881 | /* |
882 | * Check if the crash dumping IPI got issued and if so, call its callback | |
883 | * directly. This function is used when we have already been in NMI handler. | |
884 | * It doesn't return. | |
885 | */ | |
886 | void run_crash_ipi_callback(struct pt_regs *regs) | |
887 | { | |
888 | if (crash_ipi_issued) | |
889 | crash_nmi_callback(0, regs); | |
890 | } | |
891 | ||
58c5661f HK |
892 | /* Override the weak function in kernel/panic.c */ |
893 | void nmi_panic_self_stop(struct pt_regs *regs) | |
894 | { | |
895 | while (1) { | |
b279d67d HK |
896 | /* If no CPU is preparing crash dump, we simply loop here. */ |
897 | run_crash_ipi_callback(regs); | |
58c5661f HK |
898 | cpu_relax(); |
899 | } | |
900 | } | |
901 | ||
bb8dd270 EH |
902 | #else /* !CONFIG_SMP */ |
903 | void nmi_shootdown_cpus(nmi_shootdown_cb callback) | |
904 | { | |
905 | /* No other CPUs to shoot down */ | |
906 | } | |
b279d67d HK |
907 | |
908 | void run_crash_ipi_callback(struct pt_regs *regs) | |
909 | { | |
910 | } | |
2ddded21 | 911 | #endif |