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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> |
4d022e35 MB |
14 | #include <acpi/reboot.h> |
15 | #include <asm/io.h> | |
1da177e4 | 16 | #include <asm/apic.h> |
8643e28d | 17 | #include <asm/io_apic.h> |
4d37e7e3 | 18 | #include <asm/desc.h> |
4d022e35 | 19 | #include <asm/hpet.h> |
68db065c | 20 | #include <asm/pgtable.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 | ||
65051397 | 84 | void __noreturn machine_real_restart(unsigned int type) |
57b16594 | 85 | { |
57b16594 ML |
86 | local_irq_disable(); |
87 | ||
144d102b ML |
88 | /* |
89 | * Write zero to CMOS register number 0x0f, which the BIOS POST | |
90 | * routine will recognize as telling it to do a proper reboot. (Well | |
91 | * that's what this book in front of me says -- it may only apply to | |
92 | * the Phoenix BIOS though, it's not clear). At the same time, | |
93 | * disable NMIs by setting the top bit in the CMOS address register, | |
94 | * as we're about to do peculiar things to the CPU. I'm not sure if | |
95 | * `outb_p' is needed instead of just `outb'. Use it to be on the | |
96 | * safe side. (Yes, CMOS_WRITE does outb_p's. - Paul G.) | |
57b16594 ML |
97 | */ |
98 | spin_lock(&rtc_lock); | |
99 | CMOS_WRITE(0x00, 0x8f); | |
100 | spin_unlock(&rtc_lock); | |
101 | ||
102 | /* | |
103 | * Switch back to the initial page table. | |
104 | */ | |
65051397 | 105 | #ifdef CONFIG_X86_32 |
57b16594 | 106 | load_cr3(initial_page_table); |
65051397 PA |
107 | #else |
108 | write_cr3(real_mode_header->trampoline_pgd); | |
924c6b90 AL |
109 | |
110 | /* Exiting long mode will fail if CR4.PCIDE is set. */ | |
111 | if (static_cpu_has(X86_FEATURE_PCID)) | |
112 | cr4_clear_bits(X86_CR4_PCIDE); | |
65051397 | 113 | #endif |
57b16594 | 114 | |
57b16594 | 115 | /* Jump to the identity-mapped low memory code */ |
65051397 PA |
116 | #ifdef CONFIG_X86_32 |
117 | asm volatile("jmpl *%0" : : | |
118 | "rm" (real_mode_header->machine_real_restart_asm), | |
119 | "a" (type)); | |
120 | #else | |
121 | asm volatile("ljmpl *%0" : : | |
122 | "m" (real_mode_header->machine_real_restart_asm), | |
123 | "D" (type)); | |
124 | #endif | |
125 | unreachable(); | |
57b16594 ML |
126 | } |
127 | #ifdef CONFIG_APM_MODULE | |
128 | EXPORT_SYMBOL(machine_real_restart); | |
129 | #endif | |
c207aee4 | 130 | STACK_FRAME_NON_STANDARD(machine_real_restart); |
57b16594 | 131 | |
57b16594 ML |
132 | /* |
133 | * Some Apple MacBook and MacBookPro's needs reboot=p to be able to reboot | |
134 | */ | |
135 | static int __init set_pci_reboot(const struct dmi_system_id *d) | |
136 | { | |
5be44a6f IM |
137 | if (reboot_type != BOOT_CF9_FORCE) { |
138 | reboot_type = BOOT_CF9_FORCE; | |
c767a54b | 139 | pr_info("%s series board detected. Selecting %s-method for reboots.\n", |
6d9153bb | 140 | d->ident, "PCI"); |
57b16594 ML |
141 | } |
142 | return 0; | |
143 | } | |
144 | ||
1ef03890 PC |
145 | static int __init set_kbd_reboot(const struct dmi_system_id *d) |
146 | { | |
147 | if (reboot_type != BOOT_KBD) { | |
148 | reboot_type = BOOT_KBD; | |
c767a54b | 149 | pr_info("%s series board detected. Selecting %s-method for reboot.\n", |
6d9153bb | 150 | d->ident, "KBD"); |
1ef03890 PC |
151 | } |
152 | return 0; | |
153 | } | |
154 | ||
144d102b | 155 | /* |
65051397 | 156 | * This is a single dmi_table handling all reboot quirks. |
57b16594 | 157 | */ |
6faadbbb | 158 | static const struct dmi_system_id reboot_dmi_table[] __initconst = { |
e56e57f6 DJ |
159 | |
160 | /* Acer */ | |
161 | { /* Handle reboot issue on Acer Aspire one */ | |
162 | .callback = set_kbd_reboot, | |
163 | .ident = "Acer Aspire One A110", | |
b9e82af8 | 164 | .matches = { |
e56e57f6 DJ |
165 | DMI_MATCH(DMI_SYS_VENDOR, "Acer"), |
166 | DMI_MATCH(DMI_PRODUCT_NAME, "AOA110"), | |
b9e82af8 TG |
167 | }, |
168 | }, | |
e56e57f6 DJ |
169 | |
170 | /* Apple */ | |
171 | { /* Handle problems with rebooting on Apple MacBook5 */ | |
172 | .callback = set_pci_reboot, | |
173 | .ident = "Apple MacBook5", | |
1da177e4 | 174 | .matches = { |
e56e57f6 DJ |
175 | DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), |
176 | DMI_MATCH(DMI_PRODUCT_NAME, "MacBook5"), | |
1da177e4 LT |
177 | }, |
178 | }, | |
e56e57f6 DJ |
179 | { /* Handle problems with rebooting on Apple MacBookPro5 */ |
180 | .callback = set_pci_reboot, | |
181 | .ident = "Apple MacBookPro5", | |
1da177e4 | 182 | .matches = { |
e56e57f6 DJ |
183 | DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), |
184 | DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro5"), | |
1da177e4 LT |
185 | }, |
186 | }, | |
e56e57f6 DJ |
187 | { /* Handle problems with rebooting on Apple Macmini3,1 */ |
188 | .callback = set_pci_reboot, | |
189 | .ident = "Apple Macmini3,1", | |
df2edcf3 | 190 | .matches = { |
e56e57f6 DJ |
191 | DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), |
192 | DMI_MATCH(DMI_PRODUCT_NAME, "Macmini3,1"), | |
df2edcf3 JJ |
193 | }, |
194 | }, | |
e56e57f6 DJ |
195 | { /* Handle problems with rebooting on the iMac9,1. */ |
196 | .callback = set_pci_reboot, | |
197 | .ident = "Apple iMac9,1", | |
fc115bf1 | 198 | .matches = { |
e56e57f6 DJ |
199 | DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), |
200 | DMI_MATCH(DMI_PRODUCT_NAME, "iMac9,1"), | |
fc115bf1 CK |
201 | }, |
202 | }, | |
2f0c0b2d MK |
203 | { /* Handle problems with rebooting on the iMac10,1. */ |
204 | .callback = set_pci_reboot, | |
205 | .ident = "Apple iMac10,1", | |
206 | .matches = { | |
207 | DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), | |
208 | DMI_MATCH(DMI_PRODUCT_NAME, "iMac10,1"), | |
209 | }, | |
210 | }, | |
e56e57f6 | 211 | |
80313b30 SLH |
212 | /* ASRock */ |
213 | { /* Handle problems with rebooting on ASRock Q1900DC-ITX */ | |
214 | .callback = set_pci_reboot, | |
215 | .ident = "ASRock Q1900DC-ITX", | |
216 | .matches = { | |
217 | DMI_MATCH(DMI_BOARD_VENDOR, "ASRock"), | |
218 | DMI_MATCH(DMI_BOARD_NAME, "Q1900DC-ITX"), | |
219 | }, | |
220 | }, | |
221 | ||
e56e57f6 DJ |
222 | /* ASUS */ |
223 | { /* Handle problems with rebooting on ASUS P4S800 */ | |
fc1c8925 | 224 | .callback = set_bios_reboot, |
e56e57f6 | 225 | .ident = "ASUS P4S800", |
fc1c8925 | 226 | .matches = { |
e56e57f6 DJ |
227 | DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), |
228 | DMI_MATCH(DMI_BOARD_NAME, "P4S800"), | |
fc1c8925 HAA |
229 | }, |
230 | }, | |
90b28ded MH |
231 | { /* Handle problems with rebooting on ASUS EeeBook X205TA */ |
232 | .callback = set_acpi_reboot, | |
233 | .ident = "ASUS EeeBook X205TA", | |
234 | .matches = { | |
235 | DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), | |
bba8376a | 236 | DMI_MATCH(DMI_PRODUCT_NAME, "X205TA"), |
90b28ded MH |
237 | }, |
238 | }, | |
3b3e7855 MH |
239 | { /* Handle problems with rebooting on ASUS EeeBook X205TAW */ |
240 | .callback = set_acpi_reboot, | |
241 | .ident = "ASUS EeeBook X205TAW", | |
242 | .matches = { | |
243 | DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), | |
244 | DMI_MATCH(DMI_PRODUCT_NAME, "X205TAW"), | |
245 | }, | |
246 | }, | |
e56e57f6 | 247 | |
aadca6fa CG |
248 | /* Certec */ |
249 | { /* Handle problems with rebooting on Certec BPC600 */ | |
250 | .callback = set_pci_reboot, | |
251 | .ident = "Certec BPC600", | |
252 | .matches = { | |
253 | DMI_MATCH(DMI_SYS_VENDOR, "Certec"), | |
254 | DMI_MATCH(DMI_PRODUCT_NAME, "BPC600"), | |
255 | }, | |
256 | }, | |
257 | ||
e56e57f6 DJ |
258 | /* Dell */ |
259 | { /* Handle problems with rebooting on Dell DXP061 */ | |
093bac15 | 260 | .callback = set_bios_reboot, |
e56e57f6 | 261 | .ident = "Dell DXP061", |
093bac15 SC |
262 | .matches = { |
263 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
e56e57f6 | 264 | DMI_MATCH(DMI_PRODUCT_NAME, "Dell DXP061"), |
093bac15 SC |
265 | }, |
266 | }, | |
e56e57f6 | 267 | { /* Handle problems with rebooting on Dell E520's */ |
4a4aca64 | 268 | .callback = set_bios_reboot, |
e56e57f6 | 269 | .ident = "Dell E520", |
4a4aca64 JD |
270 | .matches = { |
271 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
e56e57f6 | 272 | DMI_MATCH(DMI_PRODUCT_NAME, "Dell DM061"), |
4a4aca64 JD |
273 | }, |
274 | }, | |
986189f9 LT |
275 | { /* Handle problems with rebooting on the Latitude E5410. */ |
276 | .callback = set_pci_reboot, | |
277 | .ident = "Dell Latitude E5410", | |
35ea63d7 LO |
278 | .matches = { |
279 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
986189f9 | 280 | DMI_MATCH(DMI_PRODUCT_NAME, "Latitude E5410"), |
35ea63d7 LO |
281 | }, |
282 | }, | |
e56e57f6 DJ |
283 | { /* Handle problems with rebooting on the Latitude E5420. */ |
284 | .callback = set_pci_reboot, | |
285 | .ident = "Dell Latitude E5420", | |
1da177e4 | 286 | .matches = { |
35ea63d7 | 287 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
e56e57f6 | 288 | DMI_MATCH(DMI_PRODUCT_NAME, "Latitude E5420"), |
1da177e4 LT |
289 | }, |
290 | }, | |
e56e57f6 DJ |
291 | { /* Handle problems with rebooting on the Latitude E6320. */ |
292 | .callback = set_pci_reboot, | |
293 | .ident = "Dell Latitude E6320", | |
fab3b58d IM |
294 | .matches = { |
295 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
e56e57f6 | 296 | DMI_MATCH(DMI_PRODUCT_NAME, "Latitude E6320"), |
fab3b58d IM |
297 | }, |
298 | }, | |
e56e57f6 DJ |
299 | { /* Handle problems with rebooting on the Latitude E6420. */ |
300 | .callback = set_pci_reboot, | |
301 | .ident = "Dell Latitude E6420", | |
890ffedc TB |
302 | .matches = { |
303 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
e56e57f6 | 304 | DMI_MATCH(DMI_PRODUCT_NAME, "Latitude E6420"), |
890ffedc TB |
305 | }, |
306 | }, | |
e56e57f6 | 307 | { /* Handle problems with rebooting on Dell Optiplex 330 with 0KP561 */ |
d91b14c4 | 308 | .callback = set_bios_reboot, |
e56e57f6 | 309 | .ident = "Dell OptiPlex 330", |
d91b14c4 | 310 | .matches = { |
890ffedc | 311 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
e56e57f6 DJ |
312 | DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 330"), |
313 | DMI_MATCH(DMI_BOARD_NAME, "0KP561"), | |
d91b14c4 TV |
314 | }, |
315 | }, | |
e56e57f6 | 316 | { /* Handle problems with rebooting on Dell Optiplex 360 with 0T656F */ |
dd4124a8 | 317 | .callback = set_bios_reboot, |
e56e57f6 | 318 | .ident = "Dell OptiPlex 360", |
dd4124a8 LO |
319 | .matches = { |
320 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
e56e57f6 DJ |
321 | DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 360"), |
322 | DMI_MATCH(DMI_BOARD_NAME, "0T656F"), | |
dd4124a8 LO |
323 | }, |
324 | }, | |
e56e57f6 | 325 | { /* Handle problems with rebooting on Dell Optiplex 745's SFF */ |
c5da9a2b | 326 | .callback = set_bios_reboot, |
e56e57f6 | 327 | .ident = "Dell OptiPlex 745", |
c5da9a2b AC |
328 | .matches = { |
329 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
e56e57f6 | 330 | DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 745"), |
c5da9a2b AC |
331 | }, |
332 | }, | |
e56e57f6 | 333 | { /* Handle problems with rebooting on Dell Optiplex 745's DFF */ |
88dff493 | 334 | .callback = set_bios_reboot, |
e56e57f6 | 335 | .ident = "Dell OptiPlex 745", |
88dff493 | 336 | .matches = { |
c5da9a2b | 337 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
e56e57f6 DJ |
338 | DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 745"), |
339 | DMI_MATCH(DMI_BOARD_NAME, "0MM599"), | |
88dff493 ZR |
340 | }, |
341 | }, | |
e56e57f6 | 342 | { /* Handle problems with rebooting on Dell Optiplex 745 with 0KW626 */ |
4832ddda | 343 | .callback = set_bios_reboot, |
e56e57f6 | 344 | .ident = "Dell OptiPlex 745", |
b49c78d4 | 345 | .matches = { |
e56e57f6 DJ |
346 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
347 | DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 745"), | |
348 | DMI_MATCH(DMI_BOARD_NAME, "0KW626"), | |
b49c78d4 PC |
349 | }, |
350 | }, | |
e56e57f6 | 351 | { /* Handle problems with rebooting on Dell OptiPlex 760 with 0G919G */ |
4832ddda | 352 | .callback = set_bios_reboot, |
e56e57f6 | 353 | .ident = "Dell OptiPlex 760", |
6c6c51e4 | 354 | .matches = { |
e56e57f6 DJ |
355 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
356 | DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 760"), | |
357 | DMI_MATCH(DMI_BOARD_NAME, "0G919G"), | |
6c6c51e4 PM |
358 | }, |
359 | }, | |
e56e57f6 | 360 | { /* Handle problems with rebooting on the OptiPlex 990. */ |
498cdbfb | 361 | .callback = set_pci_reboot, |
e56e57f6 | 362 | .ident = "Dell OptiPlex 990", |
498cdbfb | 363 | .matches = { |
e56e57f6 DJ |
364 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
365 | DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 990"), | |
498cdbfb OÇ |
366 | }, |
367 | }, | |
e56e57f6 DJ |
368 | { /* Handle problems with rebooting on Dell 300's */ |
369 | .callback = set_bios_reboot, | |
370 | .ident = "Dell PowerEdge 300", | |
05154752 | 371 | .matches = { |
e56e57f6 DJ |
372 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"), |
373 | DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge 300/"), | |
05154752 GH |
374 | }, |
375 | }, | |
e56e57f6 DJ |
376 | { /* Handle problems with rebooting on Dell 1300's */ |
377 | .callback = set_bios_reboot, | |
378 | .ident = "Dell PowerEdge 1300", | |
0a832320 | 379 | .matches = { |
e56e57f6 DJ |
380 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"), |
381 | DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge 1300/"), | |
0a832320 JM |
382 | }, |
383 | }, | |
e56e57f6 DJ |
384 | { /* Handle problems with rebooting on Dell 2400's */ |
385 | .callback = set_bios_reboot, | |
386 | .ident = "Dell PowerEdge 2400", | |
3628c3f5 | 387 | .matches = { |
e56e57f6 DJ |
388 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"), |
389 | DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge 2400"), | |
3628c3f5 MR |
390 | }, |
391 | }, | |
e56e57f6 | 392 | { /* Handle problems with rebooting on the Dell PowerEdge C6100. */ |
8412da75 | 393 | .callback = set_pci_reboot, |
e56e57f6 | 394 | .ident = "Dell PowerEdge C6100", |
8412da75 | 395 | .matches = { |
e56e57f6 DJ |
396 | DMI_MATCH(DMI_SYS_VENDOR, "Dell"), |
397 | DMI_MATCH(DMI_PRODUCT_NAME, "C6100"), | |
8412da75 VS |
398 | }, |
399 | }, | |
e56e57f6 | 400 | { /* Handle problems with rebooting on the Precision M6600. */ |
b7798d28 | 401 | .callback = set_pci_reboot, |
e56e57f6 | 402 | .ident = "Dell Precision M6600", |
b7798d28 DB |
403 | .matches = { |
404 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
e56e57f6 | 405 | DMI_MATCH(DMI_PRODUCT_NAME, "Precision M6600"), |
b7798d28 DB |
406 | }, |
407 | }, | |
e56e57f6 DJ |
408 | { /* Handle problems with rebooting on Dell T5400's */ |
409 | .callback = set_bios_reboot, | |
410 | .ident = "Dell Precision T5400", | |
a536877e PA |
411 | .matches = { |
412 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
e56e57f6 | 413 | DMI_MATCH(DMI_PRODUCT_NAME, "Precision WorkStation T5400"), |
a536877e PA |
414 | }, |
415 | }, | |
e56e57f6 DJ |
416 | { /* Handle problems with rebooting on Dell T7400's */ |
417 | .callback = set_bios_reboot, | |
418 | .ident = "Dell Precision T7400", | |
6be30bb7 RW |
419 | .matches = { |
420 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
e56e57f6 | 421 | DMI_MATCH(DMI_PRODUCT_NAME, "Precision WorkStation T7400"), |
6be30bb7 RW |
422 | }, |
423 | }, | |
e56e57f6 DJ |
424 | { /* Handle problems with rebooting on Dell XPS710 */ |
425 | .callback = set_bios_reboot, | |
426 | .ident = "Dell XPS710", | |
76eb9a30 ZR |
427 | .matches = { |
428 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
e56e57f6 | 429 | DMI_MATCH(DMI_PRODUCT_NAME, "Dell XPS710"), |
76eb9a30 ZR |
430 | }, |
431 | }, | |
4d581259 AH |
432 | { /* Handle problems with rebooting on Dell Optiplex 7450 AIO */ |
433 | .callback = set_acpi_reboot, | |
434 | .ident = "Dell OptiPlex 7450 AIO", | |
435 | .matches = { | |
436 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
437 | DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 7450 AIO"), | |
438 | }, | |
439 | }, | |
e56e57f6 DJ |
440 | |
441 | /* Hewlett-Packard */ | |
442 | { /* Handle problems with rebooting on HP laptops */ | |
443 | .callback = set_bios_reboot, | |
444 | .ident = "HP Compaq Laptop", | |
4f0acd31 | 445 | .matches = { |
e56e57f6 DJ |
446 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), |
447 | DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq"), | |
4f0acd31 MS |
448 | }, |
449 | }, | |
e56e57f6 DJ |
450 | |
451 | /* Sony */ | |
452 | { /* Handle problems with rebooting on Sony VGN-Z540N */ | |
453 | .callback = set_bios_reboot, | |
454 | .ident = "Sony VGN-Z540N", | |
4f0acd31 | 455 | .matches = { |
e56e57f6 DJ |
456 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), |
457 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-Z540N"), | |
4f0acd31 MS |
458 | }, |
459 | }, | |
e56e57f6 | 460 | |
6c6c51e4 PM |
461 | { } |
462 | }; | |
463 | ||
57b16594 | 464 | static int __init reboot_init(void) |
6c6c51e4 | 465 | { |
44be28e9 MF |
466 | int rv; |
467 | ||
144d102b ML |
468 | /* |
469 | * Only do the DMI check if reboot_type hasn't been overridden | |
5955633e ML |
470 | * on the command line |
471 | */ | |
44be28e9 MF |
472 | if (!reboot_default) |
473 | return 0; | |
474 | ||
475 | /* | |
476 | * The DMI quirks table takes precedence. If no quirks entry | |
4ecf7191 SA |
477 | * matches and the ACPI Hardware Reduced bit is set and EFI |
478 | * runtime services are enabled, force EFI reboot. | |
44be28e9 MF |
479 | */ |
480 | rv = dmi_check_system(reboot_dmi_table); | |
481 | ||
4ecf7191 | 482 | if (!rv && efi_reboot_required() && !efi_runtime_disabled()) |
44be28e9 MF |
483 | reboot_type = BOOT_EFI; |
484 | ||
6c6c51e4 PM |
485 | return 0; |
486 | } | |
57b16594 | 487 | core_initcall(reboot_init); |
6c6c51e4 | 488 | |
4d022e35 MB |
489 | static inline void kb_wait(void) |
490 | { | |
491 | int i; | |
492 | ||
c84d6af8 AC |
493 | for (i = 0; i < 0x10000; i++) { |
494 | if ((inb(0x64) & 0x02) == 0) | |
4d022e35 | 495 | break; |
c84d6af8 AC |
496 | udelay(2); |
497 | } | |
4d022e35 MB |
498 | } |
499 | ||
9c48f1c6 | 500 | static void vmxoff_nmi(int cpu, struct pt_regs *regs) |
d176720d EH |
501 | { |
502 | cpu_emergency_vmxoff(); | |
503 | } | |
504 | ||
144d102b | 505 | /* Use NMIs as IPIs to tell all CPUs to disable virtualization */ |
d176720d EH |
506 | static void emergency_vmx_disable_all(void) |
507 | { | |
508 | /* Just make sure we won't change CPUs while doing this */ | |
509 | local_irq_disable(); | |
510 | ||
144d102b ML |
511 | /* |
512 | * We need to disable VMX on all CPUs before rebooting, otherwise | |
d176720d EH |
513 | * we risk hanging up the machine, because the CPU ignore INIT |
514 | * signals when VMX is enabled. | |
515 | * | |
516 | * We can't take any locks and we may be on an inconsistent | |
517 | * state, so we use NMIs as IPIs to tell the other CPUs to disable | |
518 | * VMX and halt. | |
519 | * | |
520 | * For safety, we will avoid running the nmi_shootdown_cpus() | |
521 | * stuff unnecessarily, but we don't have a way to check | |
522 | * if other CPUs have VMX enabled. So we will call it only if the | |
523 | * CPU we are running on has VMX enabled. | |
524 | * | |
525 | * We will miss cases where VMX is not enabled on all CPUs. This | |
526 | * shouldn't do much harm because KVM always enable VMX on all | |
527 | * CPUs anyway. But we can miss it on the small window where KVM | |
528 | * is still enabling VMX. | |
529 | */ | |
530 | if (cpu_has_vmx() && cpu_vmx_enabled()) { | |
144d102b | 531 | /* Disable VMX on this CPU. */ |
d176720d EH |
532 | cpu_vmxoff(); |
533 | ||
534 | /* Halt and disable VMX on the other CPUs */ | |
535 | nmi_shootdown_cpus(vmxoff_nmi); | |
536 | ||
537 | } | |
538 | } | |
539 | ||
540 | ||
7432d149 IM |
541 | void __attribute__((weak)) mach_reboot_fixups(void) |
542 | { | |
543 | } | |
544 | ||
660e34ce | 545 | /* |
5be44a6f IM |
546 | * To the best of our knowledge Windows compatible x86 hardware expects |
547 | * the following on reboot: | |
660e34ce MG |
548 | * |
549 | * 1) If the FADT has the ACPI reboot register flag set, try it | |
550 | * 2) If still alive, write to the keyboard controller | |
551 | * 3) If still alive, write to the ACPI reboot register again | |
552 | * 4) If still alive, write to the keyboard controller again | |
a4f1987e | 553 | * 5) If still alive, call the EFI runtime service to reboot |
5be44a6f | 554 | * 6) If no EFI runtime service, call the BIOS to do a reboot |
660e34ce | 555 | * |
5be44a6f IM |
556 | * We default to following the same pattern. We also have |
557 | * two other reboot methods: 'triple fault' and 'PCI', which | |
558 | * can be triggered via the reboot= kernel boot option or | |
559 | * via quirks. | |
560 | * | |
561 | * This means that this function can never return, it can misbehave | |
562 | * by not rebooting properly and hanging. | |
660e34ce | 563 | */ |
416e2d63 | 564 | static void native_machine_emergency_restart(void) |
1da177e4 | 565 | { |
4d022e35 | 566 | int i; |
660e34ce MG |
567 | int attempt = 0; |
568 | int orig_reboot_type = reboot_type; | |
edf2b139 | 569 | unsigned short mode; |
4d022e35 | 570 | |
d176720d EH |
571 | if (reboot_emergency) |
572 | emergency_vmx_disable_all(); | |
573 | ||
840c2baf JC |
574 | tboot_shutdown(TB_SHUTDOWN_REBOOT); |
575 | ||
4d022e35 | 576 | /* Tell the BIOS if we want cold or warm reboot */ |
edf2b139 RH |
577 | mode = reboot_mode == REBOOT_WARM ? 0x1234 : 0; |
578 | *((unsigned short *)__va(0x472)) = mode; | |
4d022e35 | 579 | |
87615a34 MF |
580 | /* |
581 | * If an EFI capsule has been registered with the firmware then | |
582 | * override the reboot= parameter. | |
583 | */ | |
584 | if (efi_capsule_pending(NULL)) { | |
585 | pr_info("EFI capsule is pending, forcing EFI reboot.\n"); | |
586 | reboot_type = BOOT_EFI; | |
587 | } | |
588 | ||
4d022e35 MB |
589 | for (;;) { |
590 | /* Could also try the reset bit in the Hammer NB */ | |
591 | switch (reboot_type) { | |
5be44a6f IM |
592 | case BOOT_ACPI: |
593 | acpi_reboot(); | |
594 | reboot_type = BOOT_KBD; | |
595 | break; | |
596 | ||
4d022e35 | 597 | case BOOT_KBD: |
144d102b | 598 | mach_reboot_fixups(); /* For board specific fixups */ |
7432d149 | 599 | |
4d022e35 MB |
600 | for (i = 0; i < 10; i++) { |
601 | kb_wait(); | |
602 | udelay(50); | |
144d102b | 603 | outb(0xfe, 0x64); /* Pulse reset low */ |
4d022e35 MB |
604 | udelay(50); |
605 | } | |
660e34ce MG |
606 | if (attempt == 0 && orig_reboot_type == BOOT_ACPI) { |
607 | attempt = 1; | |
608 | reboot_type = BOOT_ACPI; | |
609 | } else { | |
a4f1987e | 610 | reboot_type = BOOT_EFI; |
660e34ce MG |
611 | } |
612 | break; | |
4d022e35 | 613 | |
4d022e35 | 614 | case BOOT_EFI: |
8562c99c | 615 | efi_reboot(reboot_mode, NULL); |
5be44a6f IM |
616 | reboot_type = BOOT_BIOS; |
617 | break; | |
618 | ||
619 | case BOOT_BIOS: | |
620 | machine_real_restart(MRR_BIOS); | |
621 | ||
622 | /* We're probably dead after this, but... */ | |
623 | reboot_type = BOOT_CF9_SAFE; | |
14d7ca5c | 624 | break; |
4d022e35 | 625 | |
5be44a6f | 626 | case BOOT_CF9_FORCE: |
14d7ca5c | 627 | port_cf9_safe = true; |
144d102b | 628 | /* Fall through */ |
4d022e35 | 629 | |
5be44a6f | 630 | case BOOT_CF9_SAFE: |
14d7ca5c | 631 | if (port_cf9_safe) { |
5be44a6f | 632 | u8 reboot_code = reboot_mode == REBOOT_WARM ? 0x06 : 0x0E; |
16c21ae5 | 633 | u8 cf9 = inb(0xcf9) & ~reboot_code; |
14d7ca5c PA |
634 | outb(cf9|2, 0xcf9); /* Request hard reset */ |
635 | udelay(50); | |
16c21ae5 LF |
636 | /* Actually do the reset */ |
637 | outb(cf9|reboot_code, 0xcf9); | |
14d7ca5c PA |
638 | udelay(50); |
639 | } | |
5be44a6f IM |
640 | reboot_type = BOOT_TRIPLE; |
641 | break; | |
642 | ||
643 | case BOOT_TRIPLE: | |
e802a51e | 644 | idt_invalidate(NULL); |
5be44a6f IM |
645 | __asm__ __volatile__("int3"); |
646 | ||
647 | /* We're probably dead after this, but... */ | |
648 | reboot_type = BOOT_KBD; | |
4d022e35 MB |
649 | break; |
650 | } | |
651 | } | |
652 | } | |
653 | ||
3c62c625 | 654 | void native_machine_shutdown(void) |
4d022e35 MB |
655 | { |
656 | /* Stop the cpus and apics */ | |
522e6646 | 657 | #ifdef CONFIG_X86_IO_APIC |
2885432a FY |
658 | /* |
659 | * Disabling IO APIC before local APIC is a workaround for | |
660 | * erratum AVR31 in "Intel Atom Processor C2000 Product Family | |
661 | * Specification Update". In this situation, interrupts that target | |
662 | * a Logical Processor whose Local APIC is either in the process of | |
663 | * being hardware disabled or software disabled are neither delivered | |
664 | * nor discarded. When this erratum occurs, the processor may hang. | |
665 | * | |
666 | * Even without the erratum, it still makes sense to quiet IO APIC | |
667 | * before disabling Local APIC. | |
668 | */ | |
522e6646 FY |
669 | disable_IO_APIC(); |
670 | #endif | |
671 | ||
1da177e4 | 672 | #ifdef CONFIG_SMP |
144d102b | 673 | /* |
1b3a5d02 RH |
674 | * Stop all of the others. Also disable the local irq to |
675 | * not receive the per-cpu timer interrupt which may trigger | |
676 | * scheduler's load balance. | |
1da177e4 | 677 | */ |
55c844a4 | 678 | local_irq_disable(); |
76fac077 | 679 | stop_other_cpus(); |
4d022e35 | 680 | #endif |
1da177e4 LT |
681 | |
682 | lapic_shutdown(); | |
683 | ||
c86c7fbc OH |
684 | #ifdef CONFIG_HPET_TIMER |
685 | hpet_disable(); | |
686 | #endif | |
dd2a1305 | 687 | |
4d022e35 | 688 | #ifdef CONFIG_X86_64 |
338bac52 | 689 | x86_platform.iommu_shutdown(); |
4d022e35 | 690 | #endif |
973efae2 JF |
691 | } |
692 | ||
d176720d EH |
693 | static void __machine_emergency_restart(int emergency) |
694 | { | |
695 | reboot_emergency = emergency; | |
696 | machine_ops.emergency_restart(); | |
697 | } | |
698 | ||
416e2d63 | 699 | static void native_machine_restart(char *__unused) |
dd2a1305 | 700 | { |
c767a54b | 701 | pr_notice("machine restart\n"); |
1da177e4 | 702 | |
4d022e35 MB |
703 | if (!reboot_force) |
704 | machine_shutdown(); | |
d176720d | 705 | __machine_emergency_restart(0); |
4a1421f8 EB |
706 | } |
707 | ||
416e2d63 | 708 | static void native_machine_halt(void) |
1da177e4 | 709 | { |
144d102b | 710 | /* Stop other cpus and apics */ |
d3ec5cae IV |
711 | machine_shutdown(); |
712 | ||
840c2baf JC |
713 | tboot_shutdown(TB_SHUTDOWN_HALT); |
714 | ||
d3ec5cae | 715 | stop_this_cpu(NULL); |
1da177e4 LT |
716 | } |
717 | ||
416e2d63 | 718 | static void native_machine_power_off(void) |
1da177e4 | 719 | { |
6e3fbee5 | 720 | if (pm_power_off) { |
4d022e35 MB |
721 | if (!reboot_force) |
722 | machine_shutdown(); | |
1da177e4 | 723 | pm_power_off(); |
6e3fbee5 | 724 | } |
144d102b | 725 | /* A fallback in case there is no PM info available */ |
840c2baf | 726 | tboot_shutdown(TB_SHUTDOWN_HALT); |
1da177e4 LT |
727 | } |
728 | ||
404f6aac | 729 | struct machine_ops machine_ops __ro_after_init = { |
416e2d63 JB |
730 | .power_off = native_machine_power_off, |
731 | .shutdown = native_machine_shutdown, | |
732 | .emergency_restart = native_machine_emergency_restart, | |
733 | .restart = native_machine_restart, | |
ed23dc6f | 734 | .halt = native_machine_halt, |
2965faa5 | 735 | #ifdef CONFIG_KEXEC_CORE |
ed23dc6f GC |
736 | .crash_shutdown = native_machine_crash_shutdown, |
737 | #endif | |
07f3331c | 738 | }; |
416e2d63 JB |
739 | |
740 | void machine_power_off(void) | |
741 | { | |
742 | machine_ops.power_off(); | |
743 | } | |
744 | ||
745 | void machine_shutdown(void) | |
746 | { | |
747 | machine_ops.shutdown(); | |
748 | } | |
749 | ||
750 | void machine_emergency_restart(void) | |
751 | { | |
d176720d | 752 | __machine_emergency_restart(1); |
416e2d63 JB |
753 | } |
754 | ||
755 | void machine_restart(char *cmd) | |
756 | { | |
757 | machine_ops.restart(cmd); | |
758 | } | |
759 | ||
760 | void machine_halt(void) | |
761 | { | |
762 | machine_ops.halt(); | |
763 | } | |
764 | ||
2965faa5 | 765 | #ifdef CONFIG_KEXEC_CORE |
ed23dc6f GC |
766 | void machine_crash_shutdown(struct pt_regs *regs) |
767 | { | |
768 | machine_ops.crash_shutdown(regs); | |
769 | } | |
770 | #endif | |
2ddded21 EH |
771 | |
772 | ||
5bc32950 XP |
773 | /* This is the CPU performing the emergency shutdown work. */ |
774 | int crashing_cpu = -1; | |
775 | ||
bb8dd270 | 776 | #if defined(CONFIG_SMP) |
2ddded21 | 777 | |
2ddded21 EH |
778 | static nmi_shootdown_cb shootdown_callback; |
779 | ||
780 | static atomic_t waiting_for_crash_ipi; | |
58c5661f | 781 | static int crash_ipi_issued; |
2ddded21 | 782 | |
9c48f1c6 | 783 | static int crash_nmi_callback(unsigned int val, struct pt_regs *regs) |
2ddded21 EH |
784 | { |
785 | int cpu; | |
786 | ||
2ddded21 EH |
787 | cpu = raw_smp_processor_id(); |
788 | ||
144d102b ML |
789 | /* |
790 | * Don't do anything if this handler is invoked on crashing cpu. | |
2ddded21 EH |
791 | * Otherwise, system will completely hang. Crashing cpu can get |
792 | * an NMI if system was initially booted with nmi_watchdog parameter. | |
793 | */ | |
794 | if (cpu == crashing_cpu) | |
9c48f1c6 | 795 | return NMI_HANDLED; |
2ddded21 EH |
796 | local_irq_disable(); |
797 | ||
9c48f1c6 | 798 | shootdown_callback(cpu, regs); |
2ddded21 EH |
799 | |
800 | atomic_dec(&waiting_for_crash_ipi); | |
801 | /* Assume hlt works */ | |
802 | halt(); | |
803 | for (;;) | |
804 | cpu_relax(); | |
805 | ||
9c48f1c6 | 806 | return NMI_HANDLED; |
2ddded21 EH |
807 | } |
808 | ||
809 | static void smp_send_nmi_allbutself(void) | |
810 | { | |
dac5f412 | 811 | apic->send_IPI_allbutself(NMI_VECTOR); |
2ddded21 EH |
812 | } |
813 | ||
144d102b ML |
814 | /* |
815 | * Halt all other CPUs, calling the specified function on each of them | |
bb8dd270 EH |
816 | * |
817 | * This function can be used to halt all other CPUs on crash | |
818 | * or emergency reboot time. The function passed as parameter | |
819 | * will be called inside a NMI handler on all CPUs. | |
820 | */ | |
2ddded21 EH |
821 | void nmi_shootdown_cpus(nmi_shootdown_cb callback) |
822 | { | |
823 | unsigned long msecs; | |
c415b3dc | 824 | local_irq_disable(); |
2ddded21 | 825 | |
144d102b | 826 | /* Make a note of crashing cpu. Will be used in NMI callback. */ |
2ddded21 EH |
827 | crashing_cpu = safe_smp_processor_id(); |
828 | ||
829 | shootdown_callback = callback; | |
830 | ||
831 | atomic_set(&waiting_for_crash_ipi, num_online_cpus() - 1); | |
832 | /* Would it be better to replace the trap vector here? */ | |
9c48f1c6 DZ |
833 | if (register_nmi_handler(NMI_LOCAL, crash_nmi_callback, |
834 | NMI_FLAG_FIRST, "crash")) | |
144d102b ML |
835 | return; /* Return what? */ |
836 | /* | |
837 | * Ensure the new callback function is set before sending | |
2ddded21 EH |
838 | * out the NMI |
839 | */ | |
840 | wmb(); | |
841 | ||
842 | smp_send_nmi_allbutself(); | |
843 | ||
58c5661f HK |
844 | /* Kick CPUs looping in NMI context. */ |
845 | WRITE_ONCE(crash_ipi_issued, 1); | |
846 | ||
2ddded21 EH |
847 | msecs = 1000; /* Wait at most a second for the other cpus to stop */ |
848 | while ((atomic_read(&waiting_for_crash_ipi) > 0) && msecs) { | |
849 | mdelay(1); | |
850 | msecs--; | |
851 | } | |
852 | ||
853 | /* Leave the nmi callback set */ | |
854 | } | |
58c5661f | 855 | |
b279d67d HK |
856 | /* |
857 | * Check if the crash dumping IPI got issued and if so, call its callback | |
858 | * directly. This function is used when we have already been in NMI handler. | |
859 | * It doesn't return. | |
860 | */ | |
861 | void run_crash_ipi_callback(struct pt_regs *regs) | |
862 | { | |
863 | if (crash_ipi_issued) | |
864 | crash_nmi_callback(0, regs); | |
865 | } | |
866 | ||
58c5661f HK |
867 | /* Override the weak function in kernel/panic.c */ |
868 | void nmi_panic_self_stop(struct pt_regs *regs) | |
869 | { | |
870 | while (1) { | |
b279d67d HK |
871 | /* If no CPU is preparing crash dump, we simply loop here. */ |
872 | run_crash_ipi_callback(regs); | |
58c5661f HK |
873 | cpu_relax(); |
874 | } | |
875 | } | |
876 | ||
bb8dd270 EH |
877 | #else /* !CONFIG_SMP */ |
878 | void nmi_shootdown_cpus(nmi_shootdown_cb callback) | |
879 | { | |
880 | /* No other CPUs to shoot down */ | |
881 | } | |
b279d67d HK |
882 | |
883 | void run_crash_ipi_callback(struct pt_regs *regs) | |
884 | { | |
885 | } | |
2ddded21 | 886 | #endif |