Commit | Line | Data |
---|---|---|
c767a54b JP |
1 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
2 | ||
186f4360 | 3 | #include <linux/export.h> |
cd6ed525 | 4 | #include <linux/reboot.h> |
4d022e35 MB |
5 | #include <linux/init.h> |
6 | #include <linux/pm.h> | |
7 | #include <linux/efi.h> | |
6c6c51e4 | 8 | #include <linux/dmi.h> |
d43c36dc | 9 | #include <linux/sched.h> |
69575d38 | 10 | #include <linux/tboot.h> |
ca444564 | 11 | #include <linux/delay.h> |
4d022e35 MB |
12 | #include <acpi/reboot.h> |
13 | #include <asm/io.h> | |
1da177e4 | 14 | #include <asm/apic.h> |
8643e28d | 15 | #include <asm/io_apic.h> |
4d37e7e3 | 16 | #include <asm/desc.h> |
4d022e35 | 17 | #include <asm/hpet.h> |
68db065c | 18 | #include <asm/pgtable.h> |
4412620f | 19 | #include <asm/proto.h> |
973efae2 | 20 | #include <asm/reboot_fixups.h> |
07f3331c | 21 | #include <asm/reboot.h> |
82487711 | 22 | #include <asm/pci_x86.h> |
d176720d | 23 | #include <asm/virtext.h> |
96b89dc6 | 24 | #include <asm/cpu.h> |
c410b830 | 25 | #include <asm/nmi.h> |
65051397 | 26 | #include <asm/smp.h> |
1da177e4 | 27 | |
65051397 PA |
28 | #include <linux/ctype.h> |
29 | #include <linux/mc146818rtc.h> | |
30 | #include <asm/realmode.h> | |
31 | #include <asm/x86_init.h> | |
44be28e9 | 32 | #include <asm/efi.h> |
4d022e35 | 33 | |
1da177e4 LT |
34 | /* |
35 | * Power off function, if any | |
36 | */ | |
37 | void (*pm_power_off)(void); | |
129f6946 | 38 | EXPORT_SYMBOL(pm_power_off); |
1da177e4 | 39 | |
ebdd561a | 40 | static const struct desc_ptr no_idt = {}; |
4d022e35 | 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); | |
109 | #endif | |
57b16594 | 110 | |
57b16594 | 111 | /* Jump to the identity-mapped low memory code */ |
65051397 PA |
112 | #ifdef CONFIG_X86_32 |
113 | asm volatile("jmpl *%0" : : | |
114 | "rm" (real_mode_header->machine_real_restart_asm), | |
115 | "a" (type)); | |
116 | #else | |
117 | asm volatile("ljmpl *%0" : : | |
118 | "m" (real_mode_header->machine_real_restart_asm), | |
119 | "D" (type)); | |
120 | #endif | |
121 | unreachable(); | |
57b16594 ML |
122 | } |
123 | #ifdef CONFIG_APM_MODULE | |
124 | EXPORT_SYMBOL(machine_real_restart); | |
125 | #endif | |
126 | ||
57b16594 ML |
127 | /* |
128 | * Some Apple MacBook and MacBookPro's needs reboot=p to be able to reboot | |
129 | */ | |
130 | static int __init set_pci_reboot(const struct dmi_system_id *d) | |
131 | { | |
5be44a6f IM |
132 | if (reboot_type != BOOT_CF9_FORCE) { |
133 | reboot_type = BOOT_CF9_FORCE; | |
c767a54b | 134 | pr_info("%s series board detected. Selecting %s-method for reboots.\n", |
6d9153bb | 135 | d->ident, "PCI"); |
57b16594 ML |
136 | } |
137 | return 0; | |
138 | } | |
139 | ||
1ef03890 PC |
140 | static int __init set_kbd_reboot(const struct dmi_system_id *d) |
141 | { | |
142 | if (reboot_type != BOOT_KBD) { | |
143 | reboot_type = BOOT_KBD; | |
c767a54b | 144 | pr_info("%s series board detected. Selecting %s-method for reboot.\n", |
6d9153bb | 145 | d->ident, "KBD"); |
1ef03890 PC |
146 | } |
147 | return 0; | |
148 | } | |
149 | ||
144d102b | 150 | /* |
65051397 | 151 | * This is a single dmi_table handling all reboot quirks. |
57b16594 | 152 | */ |
1da177e4 | 153 | static struct dmi_system_id __initdata reboot_dmi_table[] = { |
e56e57f6 DJ |
154 | |
155 | /* Acer */ | |
156 | { /* Handle reboot issue on Acer Aspire one */ | |
157 | .callback = set_kbd_reboot, | |
158 | .ident = "Acer Aspire One A110", | |
b9e82af8 | 159 | .matches = { |
e56e57f6 DJ |
160 | DMI_MATCH(DMI_SYS_VENDOR, "Acer"), |
161 | DMI_MATCH(DMI_PRODUCT_NAME, "AOA110"), | |
b9e82af8 TG |
162 | }, |
163 | }, | |
e56e57f6 DJ |
164 | |
165 | /* Apple */ | |
166 | { /* Handle problems with rebooting on Apple MacBook5 */ | |
167 | .callback = set_pci_reboot, | |
168 | .ident = "Apple MacBook5", | |
1da177e4 | 169 | .matches = { |
e56e57f6 DJ |
170 | DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), |
171 | DMI_MATCH(DMI_PRODUCT_NAME, "MacBook5"), | |
1da177e4 LT |
172 | }, |
173 | }, | |
e56e57f6 DJ |
174 | { /* Handle problems with rebooting on Apple MacBookPro5 */ |
175 | .callback = set_pci_reboot, | |
176 | .ident = "Apple MacBookPro5", | |
1da177e4 | 177 | .matches = { |
e56e57f6 DJ |
178 | DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), |
179 | DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro5"), | |
1da177e4 LT |
180 | }, |
181 | }, | |
e56e57f6 DJ |
182 | { /* Handle problems with rebooting on Apple Macmini3,1 */ |
183 | .callback = set_pci_reboot, | |
184 | .ident = "Apple Macmini3,1", | |
df2edcf3 | 185 | .matches = { |
e56e57f6 DJ |
186 | DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), |
187 | DMI_MATCH(DMI_PRODUCT_NAME, "Macmini3,1"), | |
df2edcf3 JJ |
188 | }, |
189 | }, | |
e56e57f6 DJ |
190 | { /* Handle problems with rebooting on the iMac9,1. */ |
191 | .callback = set_pci_reboot, | |
192 | .ident = "Apple iMac9,1", | |
fc115bf1 | 193 | .matches = { |
e56e57f6 DJ |
194 | DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), |
195 | DMI_MATCH(DMI_PRODUCT_NAME, "iMac9,1"), | |
fc115bf1 CK |
196 | }, |
197 | }, | |
2f0c0b2d MK |
198 | { /* Handle problems with rebooting on the iMac10,1. */ |
199 | .callback = set_pci_reboot, | |
200 | .ident = "Apple iMac10,1", | |
201 | .matches = { | |
202 | DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), | |
203 | DMI_MATCH(DMI_PRODUCT_NAME, "iMac10,1"), | |
204 | }, | |
205 | }, | |
e56e57f6 | 206 | |
80313b30 SLH |
207 | /* ASRock */ |
208 | { /* Handle problems with rebooting on ASRock Q1900DC-ITX */ | |
209 | .callback = set_pci_reboot, | |
210 | .ident = "ASRock Q1900DC-ITX", | |
211 | .matches = { | |
212 | DMI_MATCH(DMI_BOARD_VENDOR, "ASRock"), | |
213 | DMI_MATCH(DMI_BOARD_NAME, "Q1900DC-ITX"), | |
214 | }, | |
215 | }, | |
216 | ||
e56e57f6 DJ |
217 | /* ASUS */ |
218 | { /* Handle problems with rebooting on ASUS P4S800 */ | |
fc1c8925 | 219 | .callback = set_bios_reboot, |
e56e57f6 | 220 | .ident = "ASUS P4S800", |
fc1c8925 | 221 | .matches = { |
e56e57f6 DJ |
222 | DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), |
223 | DMI_MATCH(DMI_BOARD_NAME, "P4S800"), | |
fc1c8925 HAA |
224 | }, |
225 | }, | |
e56e57f6 | 226 | |
aadca6fa CG |
227 | /* Certec */ |
228 | { /* Handle problems with rebooting on Certec BPC600 */ | |
229 | .callback = set_pci_reboot, | |
230 | .ident = "Certec BPC600", | |
231 | .matches = { | |
232 | DMI_MATCH(DMI_SYS_VENDOR, "Certec"), | |
233 | DMI_MATCH(DMI_PRODUCT_NAME, "BPC600"), | |
234 | }, | |
235 | }, | |
236 | ||
e56e57f6 DJ |
237 | /* Dell */ |
238 | { /* Handle problems with rebooting on Dell DXP061 */ | |
093bac15 | 239 | .callback = set_bios_reboot, |
e56e57f6 | 240 | .ident = "Dell DXP061", |
093bac15 SC |
241 | .matches = { |
242 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
e56e57f6 | 243 | DMI_MATCH(DMI_PRODUCT_NAME, "Dell DXP061"), |
093bac15 SC |
244 | }, |
245 | }, | |
e56e57f6 | 246 | { /* Handle problems with rebooting on Dell E520's */ |
4a4aca64 | 247 | .callback = set_bios_reboot, |
e56e57f6 | 248 | .ident = "Dell E520", |
4a4aca64 JD |
249 | .matches = { |
250 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
e56e57f6 | 251 | DMI_MATCH(DMI_PRODUCT_NAME, "Dell DM061"), |
4a4aca64 JD |
252 | }, |
253 | }, | |
986189f9 LT |
254 | { /* Handle problems with rebooting on the Latitude E5410. */ |
255 | .callback = set_pci_reboot, | |
256 | .ident = "Dell Latitude E5410", | |
35ea63d7 LO |
257 | .matches = { |
258 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
986189f9 | 259 | DMI_MATCH(DMI_PRODUCT_NAME, "Latitude E5410"), |
35ea63d7 LO |
260 | }, |
261 | }, | |
e56e57f6 DJ |
262 | { /* Handle problems with rebooting on the Latitude E5420. */ |
263 | .callback = set_pci_reboot, | |
264 | .ident = "Dell Latitude E5420", | |
1da177e4 | 265 | .matches = { |
35ea63d7 | 266 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
e56e57f6 | 267 | DMI_MATCH(DMI_PRODUCT_NAME, "Latitude E5420"), |
1da177e4 LT |
268 | }, |
269 | }, | |
e56e57f6 DJ |
270 | { /* Handle problems with rebooting on the Latitude E6320. */ |
271 | .callback = set_pci_reboot, | |
272 | .ident = "Dell Latitude E6320", | |
fab3b58d IM |
273 | .matches = { |
274 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
e56e57f6 | 275 | DMI_MATCH(DMI_PRODUCT_NAME, "Latitude E6320"), |
fab3b58d IM |
276 | }, |
277 | }, | |
e56e57f6 DJ |
278 | { /* Handle problems with rebooting on the Latitude E6420. */ |
279 | .callback = set_pci_reboot, | |
280 | .ident = "Dell Latitude E6420", | |
890ffedc TB |
281 | .matches = { |
282 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
e56e57f6 | 283 | DMI_MATCH(DMI_PRODUCT_NAME, "Latitude E6420"), |
890ffedc TB |
284 | }, |
285 | }, | |
e56e57f6 | 286 | { /* Handle problems with rebooting on Dell Optiplex 330 with 0KP561 */ |
d91b14c4 | 287 | .callback = set_bios_reboot, |
e56e57f6 | 288 | .ident = "Dell OptiPlex 330", |
d91b14c4 | 289 | .matches = { |
890ffedc | 290 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
e56e57f6 DJ |
291 | DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 330"), |
292 | DMI_MATCH(DMI_BOARD_NAME, "0KP561"), | |
d91b14c4 TV |
293 | }, |
294 | }, | |
e56e57f6 | 295 | { /* Handle problems with rebooting on Dell Optiplex 360 with 0T656F */ |
dd4124a8 | 296 | .callback = set_bios_reboot, |
e56e57f6 | 297 | .ident = "Dell OptiPlex 360", |
dd4124a8 LO |
298 | .matches = { |
299 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
e56e57f6 DJ |
300 | DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 360"), |
301 | DMI_MATCH(DMI_BOARD_NAME, "0T656F"), | |
dd4124a8 LO |
302 | }, |
303 | }, | |
e56e57f6 | 304 | { /* Handle problems with rebooting on Dell Optiplex 745's SFF */ |
c5da9a2b | 305 | .callback = set_bios_reboot, |
e56e57f6 | 306 | .ident = "Dell OptiPlex 745", |
c5da9a2b AC |
307 | .matches = { |
308 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
e56e57f6 | 309 | DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 745"), |
c5da9a2b AC |
310 | }, |
311 | }, | |
e56e57f6 | 312 | { /* Handle problems with rebooting on Dell Optiplex 745's DFF */ |
88dff493 | 313 | .callback = set_bios_reboot, |
e56e57f6 | 314 | .ident = "Dell OptiPlex 745", |
88dff493 | 315 | .matches = { |
c5da9a2b | 316 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
e56e57f6 DJ |
317 | DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 745"), |
318 | DMI_MATCH(DMI_BOARD_NAME, "0MM599"), | |
88dff493 ZR |
319 | }, |
320 | }, | |
e56e57f6 | 321 | { /* Handle problems with rebooting on Dell Optiplex 745 with 0KW626 */ |
4832ddda | 322 | .callback = set_bios_reboot, |
e56e57f6 | 323 | .ident = "Dell OptiPlex 745", |
b49c78d4 | 324 | .matches = { |
e56e57f6 DJ |
325 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
326 | DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 745"), | |
327 | DMI_MATCH(DMI_BOARD_NAME, "0KW626"), | |
b49c78d4 PC |
328 | }, |
329 | }, | |
e56e57f6 | 330 | { /* Handle problems with rebooting on Dell OptiPlex 760 with 0G919G */ |
4832ddda | 331 | .callback = set_bios_reboot, |
e56e57f6 | 332 | .ident = "Dell OptiPlex 760", |
6c6c51e4 | 333 | .matches = { |
e56e57f6 DJ |
334 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
335 | DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 760"), | |
336 | DMI_MATCH(DMI_BOARD_NAME, "0G919G"), | |
6c6c51e4 PM |
337 | }, |
338 | }, | |
e56e57f6 | 339 | { /* Handle problems with rebooting on the OptiPlex 990. */ |
498cdbfb | 340 | .callback = set_pci_reboot, |
e56e57f6 | 341 | .ident = "Dell OptiPlex 990", |
498cdbfb | 342 | .matches = { |
e56e57f6 DJ |
343 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
344 | DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 990"), | |
498cdbfb OÇ |
345 | }, |
346 | }, | |
e56e57f6 DJ |
347 | { /* Handle problems with rebooting on Dell 300's */ |
348 | .callback = set_bios_reboot, | |
349 | .ident = "Dell PowerEdge 300", | |
05154752 | 350 | .matches = { |
e56e57f6 DJ |
351 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"), |
352 | DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge 300/"), | |
05154752 GH |
353 | }, |
354 | }, | |
e56e57f6 DJ |
355 | { /* Handle problems with rebooting on Dell 1300's */ |
356 | .callback = set_bios_reboot, | |
357 | .ident = "Dell PowerEdge 1300", | |
0a832320 | 358 | .matches = { |
e56e57f6 DJ |
359 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"), |
360 | DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge 1300/"), | |
0a832320 JM |
361 | }, |
362 | }, | |
e56e57f6 DJ |
363 | { /* Handle problems with rebooting on Dell 2400's */ |
364 | .callback = set_bios_reboot, | |
365 | .ident = "Dell PowerEdge 2400", | |
3628c3f5 | 366 | .matches = { |
e56e57f6 DJ |
367 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"), |
368 | DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge 2400"), | |
3628c3f5 MR |
369 | }, |
370 | }, | |
e56e57f6 | 371 | { /* Handle problems with rebooting on the Dell PowerEdge C6100. */ |
8412da75 | 372 | .callback = set_pci_reboot, |
e56e57f6 | 373 | .ident = "Dell PowerEdge C6100", |
8412da75 | 374 | .matches = { |
e56e57f6 DJ |
375 | DMI_MATCH(DMI_SYS_VENDOR, "Dell"), |
376 | DMI_MATCH(DMI_PRODUCT_NAME, "C6100"), | |
8412da75 VS |
377 | }, |
378 | }, | |
e56e57f6 | 379 | { /* Handle problems with rebooting on the Precision M6600. */ |
b7798d28 | 380 | .callback = set_pci_reboot, |
e56e57f6 | 381 | .ident = "Dell Precision M6600", |
b7798d28 DB |
382 | .matches = { |
383 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
e56e57f6 | 384 | DMI_MATCH(DMI_PRODUCT_NAME, "Precision M6600"), |
b7798d28 DB |
385 | }, |
386 | }, | |
e56e57f6 DJ |
387 | { /* Handle problems with rebooting on Dell T5400's */ |
388 | .callback = set_bios_reboot, | |
389 | .ident = "Dell Precision T5400", | |
a536877e PA |
390 | .matches = { |
391 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
e56e57f6 | 392 | DMI_MATCH(DMI_PRODUCT_NAME, "Precision WorkStation T5400"), |
a536877e PA |
393 | }, |
394 | }, | |
e56e57f6 DJ |
395 | { /* Handle problems with rebooting on Dell T7400's */ |
396 | .callback = set_bios_reboot, | |
397 | .ident = "Dell Precision T7400", | |
6be30bb7 RW |
398 | .matches = { |
399 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
e56e57f6 | 400 | DMI_MATCH(DMI_PRODUCT_NAME, "Precision WorkStation T7400"), |
6be30bb7 RW |
401 | }, |
402 | }, | |
e56e57f6 DJ |
403 | { /* Handle problems with rebooting on Dell XPS710 */ |
404 | .callback = set_bios_reboot, | |
405 | .ident = "Dell XPS710", | |
76eb9a30 ZR |
406 | .matches = { |
407 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
e56e57f6 | 408 | DMI_MATCH(DMI_PRODUCT_NAME, "Dell XPS710"), |
76eb9a30 ZR |
409 | }, |
410 | }, | |
4d581259 AH |
411 | { /* Handle problems with rebooting on Dell Optiplex 7450 AIO */ |
412 | .callback = set_acpi_reboot, | |
413 | .ident = "Dell OptiPlex 7450 AIO", | |
414 | .matches = { | |
415 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
416 | DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 7450 AIO"), | |
417 | }, | |
418 | }, | |
e56e57f6 DJ |
419 | |
420 | /* Hewlett-Packard */ | |
421 | { /* Handle problems with rebooting on HP laptops */ | |
422 | .callback = set_bios_reboot, | |
423 | .ident = "HP Compaq Laptop", | |
4f0acd31 | 424 | .matches = { |
e56e57f6 DJ |
425 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), |
426 | DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq"), | |
4f0acd31 MS |
427 | }, |
428 | }, | |
e56e57f6 DJ |
429 | |
430 | /* Sony */ | |
431 | { /* Handle problems with rebooting on Sony VGN-Z540N */ | |
432 | .callback = set_bios_reboot, | |
433 | .ident = "Sony VGN-Z540N", | |
4f0acd31 | 434 | .matches = { |
e56e57f6 DJ |
435 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), |
436 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-Z540N"), | |
4f0acd31 MS |
437 | }, |
438 | }, | |
e56e57f6 | 439 | |
6c6c51e4 PM |
440 | { } |
441 | }; | |
442 | ||
57b16594 | 443 | static int __init reboot_init(void) |
6c6c51e4 | 444 | { |
44be28e9 MF |
445 | int rv; |
446 | ||
144d102b ML |
447 | /* |
448 | * Only do the DMI check if reboot_type hasn't been overridden | |
5955633e ML |
449 | * on the command line |
450 | */ | |
44be28e9 MF |
451 | if (!reboot_default) |
452 | return 0; | |
453 | ||
454 | /* | |
455 | * The DMI quirks table takes precedence. If no quirks entry | |
456 | * matches and the ACPI Hardware Reduced bit is set, force EFI | |
457 | * reboot. | |
458 | */ | |
459 | rv = dmi_check_system(reboot_dmi_table); | |
460 | ||
461 | if (!rv && efi_reboot_required()) | |
462 | reboot_type = BOOT_EFI; | |
463 | ||
6c6c51e4 PM |
464 | return 0; |
465 | } | |
57b16594 | 466 | core_initcall(reboot_init); |
6c6c51e4 | 467 | |
4d022e35 MB |
468 | static inline void kb_wait(void) |
469 | { | |
470 | int i; | |
471 | ||
c84d6af8 AC |
472 | for (i = 0; i < 0x10000; i++) { |
473 | if ((inb(0x64) & 0x02) == 0) | |
4d022e35 | 474 | break; |
c84d6af8 AC |
475 | udelay(2); |
476 | } | |
4d022e35 MB |
477 | } |
478 | ||
9c48f1c6 | 479 | static void vmxoff_nmi(int cpu, struct pt_regs *regs) |
d176720d EH |
480 | { |
481 | cpu_emergency_vmxoff(); | |
482 | } | |
483 | ||
144d102b | 484 | /* Use NMIs as IPIs to tell all CPUs to disable virtualization */ |
d176720d EH |
485 | static void emergency_vmx_disable_all(void) |
486 | { | |
487 | /* Just make sure we won't change CPUs while doing this */ | |
488 | local_irq_disable(); | |
489 | ||
144d102b ML |
490 | /* |
491 | * We need to disable VMX on all CPUs before rebooting, otherwise | |
d176720d EH |
492 | * we risk hanging up the machine, because the CPU ignore INIT |
493 | * signals when VMX is enabled. | |
494 | * | |
495 | * We can't take any locks and we may be on an inconsistent | |
496 | * state, so we use NMIs as IPIs to tell the other CPUs to disable | |
497 | * VMX and halt. | |
498 | * | |
499 | * For safety, we will avoid running the nmi_shootdown_cpus() | |
500 | * stuff unnecessarily, but we don't have a way to check | |
501 | * if other CPUs have VMX enabled. So we will call it only if the | |
502 | * CPU we are running on has VMX enabled. | |
503 | * | |
504 | * We will miss cases where VMX is not enabled on all CPUs. This | |
505 | * shouldn't do much harm because KVM always enable VMX on all | |
506 | * CPUs anyway. But we can miss it on the small window where KVM | |
507 | * is still enabling VMX. | |
508 | */ | |
509 | if (cpu_has_vmx() && cpu_vmx_enabled()) { | |
144d102b | 510 | /* Disable VMX on this CPU. */ |
d176720d EH |
511 | cpu_vmxoff(); |
512 | ||
513 | /* Halt and disable VMX on the other CPUs */ | |
514 | nmi_shootdown_cpus(vmxoff_nmi); | |
515 | ||
516 | } | |
517 | } | |
518 | ||
519 | ||
7432d149 IM |
520 | void __attribute__((weak)) mach_reboot_fixups(void) |
521 | { | |
522 | } | |
523 | ||
660e34ce | 524 | /* |
5be44a6f IM |
525 | * To the best of our knowledge Windows compatible x86 hardware expects |
526 | * the following on reboot: | |
660e34ce MG |
527 | * |
528 | * 1) If the FADT has the ACPI reboot register flag set, try it | |
529 | * 2) If still alive, write to the keyboard controller | |
530 | * 3) If still alive, write to the ACPI reboot register again | |
531 | * 4) If still alive, write to the keyboard controller again | |
a4f1987e | 532 | * 5) If still alive, call the EFI runtime service to reboot |
5be44a6f | 533 | * 6) If no EFI runtime service, call the BIOS to do a reboot |
660e34ce | 534 | * |
5be44a6f IM |
535 | * We default to following the same pattern. We also have |
536 | * two other reboot methods: 'triple fault' and 'PCI', which | |
537 | * can be triggered via the reboot= kernel boot option or | |
538 | * via quirks. | |
539 | * | |
540 | * This means that this function can never return, it can misbehave | |
541 | * by not rebooting properly and hanging. | |
660e34ce | 542 | */ |
416e2d63 | 543 | static void native_machine_emergency_restart(void) |
1da177e4 | 544 | { |
4d022e35 | 545 | int i; |
660e34ce MG |
546 | int attempt = 0; |
547 | int orig_reboot_type = reboot_type; | |
edf2b139 | 548 | unsigned short mode; |
4d022e35 | 549 | |
d176720d EH |
550 | if (reboot_emergency) |
551 | emergency_vmx_disable_all(); | |
552 | ||
840c2baf JC |
553 | tboot_shutdown(TB_SHUTDOWN_REBOOT); |
554 | ||
4d022e35 | 555 | /* Tell the BIOS if we want cold or warm reboot */ |
edf2b139 RH |
556 | mode = reboot_mode == REBOOT_WARM ? 0x1234 : 0; |
557 | *((unsigned short *)__va(0x472)) = mode; | |
4d022e35 | 558 | |
87615a34 MF |
559 | /* |
560 | * If an EFI capsule has been registered with the firmware then | |
561 | * override the reboot= parameter. | |
562 | */ | |
563 | if (efi_capsule_pending(NULL)) { | |
564 | pr_info("EFI capsule is pending, forcing EFI reboot.\n"); | |
565 | reboot_type = BOOT_EFI; | |
566 | } | |
567 | ||
4d022e35 MB |
568 | for (;;) { |
569 | /* Could also try the reset bit in the Hammer NB */ | |
570 | switch (reboot_type) { | |
5be44a6f IM |
571 | case BOOT_ACPI: |
572 | acpi_reboot(); | |
573 | reboot_type = BOOT_KBD; | |
574 | break; | |
575 | ||
4d022e35 | 576 | case BOOT_KBD: |
144d102b | 577 | mach_reboot_fixups(); /* For board specific fixups */ |
7432d149 | 578 | |
4d022e35 MB |
579 | for (i = 0; i < 10; i++) { |
580 | kb_wait(); | |
581 | udelay(50); | |
144d102b | 582 | outb(0xfe, 0x64); /* Pulse reset low */ |
4d022e35 MB |
583 | udelay(50); |
584 | } | |
660e34ce MG |
585 | if (attempt == 0 && orig_reboot_type == BOOT_ACPI) { |
586 | attempt = 1; | |
587 | reboot_type = BOOT_ACPI; | |
588 | } else { | |
a4f1987e | 589 | reboot_type = BOOT_EFI; |
660e34ce MG |
590 | } |
591 | break; | |
4d022e35 | 592 | |
4d022e35 | 593 | case BOOT_EFI: |
8562c99c | 594 | efi_reboot(reboot_mode, NULL); |
5be44a6f IM |
595 | reboot_type = BOOT_BIOS; |
596 | break; | |
597 | ||
598 | case BOOT_BIOS: | |
599 | machine_real_restart(MRR_BIOS); | |
600 | ||
601 | /* We're probably dead after this, but... */ | |
602 | reboot_type = BOOT_CF9_SAFE; | |
14d7ca5c | 603 | break; |
4d022e35 | 604 | |
5be44a6f | 605 | case BOOT_CF9_FORCE: |
14d7ca5c | 606 | port_cf9_safe = true; |
144d102b | 607 | /* Fall through */ |
4d022e35 | 608 | |
5be44a6f | 609 | case BOOT_CF9_SAFE: |
14d7ca5c | 610 | if (port_cf9_safe) { |
5be44a6f | 611 | u8 reboot_code = reboot_mode == REBOOT_WARM ? 0x06 : 0x0E; |
16c21ae5 | 612 | u8 cf9 = inb(0xcf9) & ~reboot_code; |
14d7ca5c PA |
613 | outb(cf9|2, 0xcf9); /* Request hard reset */ |
614 | udelay(50); | |
16c21ae5 LF |
615 | /* Actually do the reset */ |
616 | outb(cf9|reboot_code, 0xcf9); | |
14d7ca5c PA |
617 | udelay(50); |
618 | } | |
5be44a6f IM |
619 | reboot_type = BOOT_TRIPLE; |
620 | break; | |
621 | ||
622 | case BOOT_TRIPLE: | |
623 | load_idt(&no_idt); | |
624 | __asm__ __volatile__("int3"); | |
625 | ||
626 | /* We're probably dead after this, but... */ | |
627 | reboot_type = BOOT_KBD; | |
4d022e35 MB |
628 | break; |
629 | } | |
630 | } | |
631 | } | |
632 | ||
3c62c625 | 633 | void native_machine_shutdown(void) |
4d022e35 MB |
634 | { |
635 | /* Stop the cpus and apics */ | |
522e6646 | 636 | #ifdef CONFIG_X86_IO_APIC |
2885432a FY |
637 | /* |
638 | * Disabling IO APIC before local APIC is a workaround for | |
639 | * erratum AVR31 in "Intel Atom Processor C2000 Product Family | |
640 | * Specification Update". In this situation, interrupts that target | |
641 | * a Logical Processor whose Local APIC is either in the process of | |
642 | * being hardware disabled or software disabled are neither delivered | |
643 | * nor discarded. When this erratum occurs, the processor may hang. | |
644 | * | |
645 | * Even without the erratum, it still makes sense to quiet IO APIC | |
646 | * before disabling Local APIC. | |
647 | */ | |
522e6646 FY |
648 | disable_IO_APIC(); |
649 | #endif | |
650 | ||
1da177e4 | 651 | #ifdef CONFIG_SMP |
144d102b | 652 | /* |
1b3a5d02 RH |
653 | * Stop all of the others. Also disable the local irq to |
654 | * not receive the per-cpu timer interrupt which may trigger | |
655 | * scheduler's load balance. | |
1da177e4 | 656 | */ |
55c844a4 | 657 | local_irq_disable(); |
76fac077 | 658 | stop_other_cpus(); |
4d022e35 | 659 | #endif |
1da177e4 LT |
660 | |
661 | lapic_shutdown(); | |
662 | ||
c86c7fbc OH |
663 | #ifdef CONFIG_HPET_TIMER |
664 | hpet_disable(); | |
665 | #endif | |
dd2a1305 | 666 | |
4d022e35 | 667 | #ifdef CONFIG_X86_64 |
338bac52 | 668 | x86_platform.iommu_shutdown(); |
4d022e35 | 669 | #endif |
973efae2 JF |
670 | } |
671 | ||
d176720d EH |
672 | static void __machine_emergency_restart(int emergency) |
673 | { | |
674 | reboot_emergency = emergency; | |
675 | machine_ops.emergency_restart(); | |
676 | } | |
677 | ||
416e2d63 | 678 | static void native_machine_restart(char *__unused) |
dd2a1305 | 679 | { |
c767a54b | 680 | pr_notice("machine restart\n"); |
1da177e4 | 681 | |
4d022e35 MB |
682 | if (!reboot_force) |
683 | machine_shutdown(); | |
d176720d | 684 | __machine_emergency_restart(0); |
4a1421f8 EB |
685 | } |
686 | ||
416e2d63 | 687 | static void native_machine_halt(void) |
1da177e4 | 688 | { |
144d102b | 689 | /* Stop other cpus and apics */ |
d3ec5cae IV |
690 | machine_shutdown(); |
691 | ||
840c2baf JC |
692 | tboot_shutdown(TB_SHUTDOWN_HALT); |
693 | ||
d3ec5cae | 694 | stop_this_cpu(NULL); |
1da177e4 LT |
695 | } |
696 | ||
416e2d63 | 697 | static void native_machine_power_off(void) |
1da177e4 | 698 | { |
6e3fbee5 | 699 | if (pm_power_off) { |
4d022e35 MB |
700 | if (!reboot_force) |
701 | machine_shutdown(); | |
1da177e4 | 702 | pm_power_off(); |
6e3fbee5 | 703 | } |
144d102b | 704 | /* A fallback in case there is no PM info available */ |
840c2baf | 705 | tboot_shutdown(TB_SHUTDOWN_HALT); |
1da177e4 LT |
706 | } |
707 | ||
07f3331c | 708 | struct machine_ops machine_ops = { |
416e2d63 JB |
709 | .power_off = native_machine_power_off, |
710 | .shutdown = native_machine_shutdown, | |
711 | .emergency_restart = native_machine_emergency_restart, | |
712 | .restart = native_machine_restart, | |
ed23dc6f | 713 | .halt = native_machine_halt, |
2965faa5 | 714 | #ifdef CONFIG_KEXEC_CORE |
ed23dc6f GC |
715 | .crash_shutdown = native_machine_crash_shutdown, |
716 | #endif | |
07f3331c | 717 | }; |
416e2d63 JB |
718 | |
719 | void machine_power_off(void) | |
720 | { | |
721 | machine_ops.power_off(); | |
722 | } | |
723 | ||
724 | void machine_shutdown(void) | |
725 | { | |
726 | machine_ops.shutdown(); | |
727 | } | |
728 | ||
729 | void machine_emergency_restart(void) | |
730 | { | |
d176720d | 731 | __machine_emergency_restart(1); |
416e2d63 JB |
732 | } |
733 | ||
734 | void machine_restart(char *cmd) | |
735 | { | |
736 | machine_ops.restart(cmd); | |
737 | } | |
738 | ||
739 | void machine_halt(void) | |
740 | { | |
741 | machine_ops.halt(); | |
742 | } | |
743 | ||
2965faa5 | 744 | #ifdef CONFIG_KEXEC_CORE |
ed23dc6f GC |
745 | void machine_crash_shutdown(struct pt_regs *regs) |
746 | { | |
747 | machine_ops.crash_shutdown(regs); | |
748 | } | |
749 | #endif | |
2ddded21 EH |
750 | |
751 | ||
bb8dd270 | 752 | #if defined(CONFIG_SMP) |
2ddded21 EH |
753 | |
754 | /* This keeps a track of which one is crashing cpu. */ | |
755 | static int crashing_cpu; | |
756 | static nmi_shootdown_cb shootdown_callback; | |
757 | ||
758 | static atomic_t waiting_for_crash_ipi; | |
58c5661f | 759 | static int crash_ipi_issued; |
2ddded21 | 760 | |
9c48f1c6 | 761 | static int crash_nmi_callback(unsigned int val, struct pt_regs *regs) |
2ddded21 EH |
762 | { |
763 | int cpu; | |
764 | ||
2ddded21 EH |
765 | cpu = raw_smp_processor_id(); |
766 | ||
144d102b ML |
767 | /* |
768 | * Don't do anything if this handler is invoked on crashing cpu. | |
2ddded21 EH |
769 | * Otherwise, system will completely hang. Crashing cpu can get |
770 | * an NMI if system was initially booted with nmi_watchdog parameter. | |
771 | */ | |
772 | if (cpu == crashing_cpu) | |
9c48f1c6 | 773 | return NMI_HANDLED; |
2ddded21 EH |
774 | local_irq_disable(); |
775 | ||
9c48f1c6 | 776 | shootdown_callback(cpu, regs); |
2ddded21 EH |
777 | |
778 | atomic_dec(&waiting_for_crash_ipi); | |
779 | /* Assume hlt works */ | |
780 | halt(); | |
781 | for (;;) | |
782 | cpu_relax(); | |
783 | ||
9c48f1c6 | 784 | return NMI_HANDLED; |
2ddded21 EH |
785 | } |
786 | ||
787 | static void smp_send_nmi_allbutself(void) | |
788 | { | |
dac5f412 | 789 | apic->send_IPI_allbutself(NMI_VECTOR); |
2ddded21 EH |
790 | } |
791 | ||
144d102b ML |
792 | /* |
793 | * Halt all other CPUs, calling the specified function on each of them | |
bb8dd270 EH |
794 | * |
795 | * This function can be used to halt all other CPUs on crash | |
796 | * or emergency reboot time. The function passed as parameter | |
797 | * will be called inside a NMI handler on all CPUs. | |
798 | */ | |
2ddded21 EH |
799 | void nmi_shootdown_cpus(nmi_shootdown_cb callback) |
800 | { | |
801 | unsigned long msecs; | |
c415b3dc | 802 | local_irq_disable(); |
2ddded21 | 803 | |
144d102b | 804 | /* Make a note of crashing cpu. Will be used in NMI callback. */ |
2ddded21 EH |
805 | crashing_cpu = safe_smp_processor_id(); |
806 | ||
807 | shootdown_callback = callback; | |
808 | ||
809 | atomic_set(&waiting_for_crash_ipi, num_online_cpus() - 1); | |
810 | /* Would it be better to replace the trap vector here? */ | |
9c48f1c6 DZ |
811 | if (register_nmi_handler(NMI_LOCAL, crash_nmi_callback, |
812 | NMI_FLAG_FIRST, "crash")) | |
144d102b ML |
813 | return; /* Return what? */ |
814 | /* | |
815 | * Ensure the new callback function is set before sending | |
2ddded21 EH |
816 | * out the NMI |
817 | */ | |
818 | wmb(); | |
819 | ||
820 | smp_send_nmi_allbutself(); | |
821 | ||
58c5661f HK |
822 | /* Kick CPUs looping in NMI context. */ |
823 | WRITE_ONCE(crash_ipi_issued, 1); | |
824 | ||
2ddded21 EH |
825 | msecs = 1000; /* Wait at most a second for the other cpus to stop */ |
826 | while ((atomic_read(&waiting_for_crash_ipi) > 0) && msecs) { | |
827 | mdelay(1); | |
828 | msecs--; | |
829 | } | |
830 | ||
831 | /* Leave the nmi callback set */ | |
832 | } | |
58c5661f | 833 | |
b279d67d HK |
834 | /* |
835 | * Check if the crash dumping IPI got issued and if so, call its callback | |
836 | * directly. This function is used when we have already been in NMI handler. | |
837 | * It doesn't return. | |
838 | */ | |
839 | void run_crash_ipi_callback(struct pt_regs *regs) | |
840 | { | |
841 | if (crash_ipi_issued) | |
842 | crash_nmi_callback(0, regs); | |
843 | } | |
844 | ||
58c5661f HK |
845 | /* Override the weak function in kernel/panic.c */ |
846 | void nmi_panic_self_stop(struct pt_regs *regs) | |
847 | { | |
848 | while (1) { | |
b279d67d HK |
849 | /* If no CPU is preparing crash dump, we simply loop here. */ |
850 | run_crash_ipi_callback(regs); | |
58c5661f HK |
851 | cpu_relax(); |
852 | } | |
853 | } | |
854 | ||
bb8dd270 EH |
855 | #else /* !CONFIG_SMP */ |
856 | void nmi_shootdown_cpus(nmi_shootdown_cb callback) | |
857 | { | |
858 | /* No other CPUs to shoot down */ | |
859 | } | |
b279d67d HK |
860 | |
861 | void run_crash_ipi_callback(struct pt_regs *regs) | |
862 | { | |
863 | } | |
2ddded21 | 864 | #endif |