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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> |
00089c04 | 13 | #include <linux/objtool.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> |
6caa55e3 | 35 | #include <asm/nospec-branch.h> |
4d022e35 | 36 | |
1da177e4 LT |
37 | /* |
38 | * Power off function, if any | |
39 | */ | |
40 | void (*pm_power_off)(void); | |
129f6946 | 41 | EXPORT_SYMBOL(pm_power_off); |
1da177e4 | 42 | |
144d102b ML |
43 | /* |
44 | * This is set if we need to go through the 'emergency' path. | |
d176720d EH |
45 | * When machine_emergency_restart() is called, we may be on |
46 | * an inconsistent state and won't be able to do a clean cleanup | |
47 | */ | |
48 | static int reboot_emergency; | |
49 | ||
14d7ca5c PA |
50 | /* This is set by the PCI code if either type 1 or type 2 PCI is detected */ |
51 | bool port_cf9_safe = false; | |
52 | ||
1da177e4 LT |
53 | /* |
54 | * Reboot options and system auto-detection code provided by | |
55 | * Dell Inc. so their systems "just work". :-) | |
56 | */ | |
57 | ||
4d581259 AH |
58 | /* |
59 | * Some machines require the "reboot=a" commandline options | |
60 | */ | |
61 | static int __init set_acpi_reboot(const struct dmi_system_id *d) | |
62 | { | |
63 | if (reboot_type != BOOT_ACPI) { | |
64 | reboot_type = BOOT_ACPI; | |
65 | pr_info("%s series board detected. Selecting %s-method for reboots.\n", | |
66 | d->ident, "ACPI"); | |
67 | } | |
68 | return 0; | |
69 | } | |
70 | ||
1da177e4 | 71 | /* |
1ef03890 | 72 | * Some machines require the "reboot=b" or "reboot=k" commandline options, |
4d022e35 | 73 | * this quirk makes that automatic. |
1da177e4 | 74 | */ |
1855256c | 75 | static int __init set_bios_reboot(const struct dmi_system_id *d) |
1da177e4 | 76 | { |
4d022e35 MB |
77 | if (reboot_type != BOOT_BIOS) { |
78 | reboot_type = BOOT_BIOS; | |
c767a54b | 79 | pr_info("%s series board detected. Selecting %s-method for reboots.\n", |
6d9153bb | 80 | d->ident, "BIOS"); |
1da177e4 LT |
81 | } |
82 | return 0; | |
83 | } | |
84 | ||
0082517f JHP |
85 | /* |
86 | * Some machines don't handle the default ACPI reboot method and | |
87 | * require the EFI reboot method: | |
88 | */ | |
89 | static int __init set_efi_reboot(const struct dmi_system_id *d) | |
90 | { | |
91 | if (reboot_type != BOOT_EFI && !efi_runtime_disabled()) { | |
92 | reboot_type = BOOT_EFI; | |
93 | pr_info("%s series board detected. Selecting EFI-method for reboot.\n", d->ident); | |
94 | } | |
95 | return 0; | |
96 | } | |
97 | ||
65051397 | 98 | void __noreturn machine_real_restart(unsigned int type) |
57b16594 | 99 | { |
57b16594 ML |
100 | local_irq_disable(); |
101 | ||
144d102b ML |
102 | /* |
103 | * Write zero to CMOS register number 0x0f, which the BIOS POST | |
104 | * routine will recognize as telling it to do a proper reboot. (Well | |
105 | * that's what this book in front of me says -- it may only apply to | |
106 | * the Phoenix BIOS though, it's not clear). At the same time, | |
107 | * disable NMIs by setting the top bit in the CMOS address register, | |
108 | * as we're about to do peculiar things to the CPU. I'm not sure if | |
109 | * `outb_p' is needed instead of just `outb'. Use it to be on the | |
110 | * safe side. (Yes, CMOS_WRITE does outb_p's. - Paul G.) | |
57b16594 ML |
111 | */ |
112 | spin_lock(&rtc_lock); | |
113 | CMOS_WRITE(0x00, 0x8f); | |
114 | spin_unlock(&rtc_lock); | |
115 | ||
116 | /* | |
0bd1962d | 117 | * Switch to the trampoline page table. |
57b16594 | 118 | */ |
0bd1962d | 119 | load_trampoline_pgtable(); |
57b16594 | 120 | |
57b16594 | 121 | /* Jump to the identity-mapped low memory code */ |
65051397 | 122 | #ifdef CONFIG_X86_32 |
b6291ed9 | 123 | asm volatile("jmpl *%0" : : |
65051397 PA |
124 | "rm" (real_mode_header->machine_real_restart_asm), |
125 | "a" (type)); | |
126 | #else | |
b6291ed9 | 127 | asm volatile("ljmpl *%0" : : |
65051397 PA |
128 | "m" (real_mode_header->machine_real_restart_asm), |
129 | "D" (type)); | |
130 | #endif | |
131 | unreachable(); | |
57b16594 ML |
132 | } |
133 | #ifdef CONFIG_APM_MODULE | |
134 | EXPORT_SYMBOL(machine_real_restart); | |
135 | #endif | |
c207aee4 | 136 | STACK_FRAME_NON_STANDARD(machine_real_restart); |
57b16594 | 137 | |
57b16594 ML |
138 | /* |
139 | * Some Apple MacBook and MacBookPro's needs reboot=p to be able to reboot | |
140 | */ | |
141 | static int __init set_pci_reboot(const struct dmi_system_id *d) | |
142 | { | |
5be44a6f IM |
143 | if (reboot_type != BOOT_CF9_FORCE) { |
144 | reboot_type = BOOT_CF9_FORCE; | |
c767a54b | 145 | pr_info("%s series board detected. Selecting %s-method for reboots.\n", |
6d9153bb | 146 | d->ident, "PCI"); |
57b16594 ML |
147 | } |
148 | return 0; | |
149 | } | |
150 | ||
1ef03890 PC |
151 | static int __init set_kbd_reboot(const struct dmi_system_id *d) |
152 | { | |
153 | if (reboot_type != BOOT_KBD) { | |
154 | reboot_type = BOOT_KBD; | |
c767a54b | 155 | pr_info("%s series board detected. Selecting %s-method for reboot.\n", |
6d9153bb | 156 | d->ident, "KBD"); |
1ef03890 PC |
157 | } |
158 | return 0; | |
159 | } | |
160 | ||
144d102b | 161 | /* |
65051397 | 162 | * This is a single dmi_table handling all reboot quirks. |
57b16594 | 163 | */ |
6faadbbb | 164 | static const struct dmi_system_id reboot_dmi_table[] __initconst = { |
e56e57f6 DJ |
165 | |
166 | /* Acer */ | |
167 | { /* Handle reboot issue on Acer Aspire one */ | |
168 | .callback = set_kbd_reboot, | |
169 | .ident = "Acer Aspire One A110", | |
b9e82af8 | 170 | .matches = { |
e56e57f6 DJ |
171 | DMI_MATCH(DMI_SYS_VENDOR, "Acer"), |
172 | DMI_MATCH(DMI_PRODUCT_NAME, "AOA110"), | |
b9e82af8 TG |
173 | }, |
174 | }, | |
0082517f JHP |
175 | { /* Handle reboot issue on Acer TravelMate X514-51T */ |
176 | .callback = set_efi_reboot, | |
177 | .ident = "Acer TravelMate X514-51T", | |
178 | .matches = { | |
179 | DMI_MATCH(DMI_SYS_VENDOR, "Acer"), | |
180 | DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate X514-51T"), | |
181 | }, | |
182 | }, | |
e56e57f6 DJ |
183 | |
184 | /* Apple */ | |
185 | { /* Handle problems with rebooting on Apple MacBook5 */ | |
186 | .callback = set_pci_reboot, | |
187 | .ident = "Apple MacBook5", | |
1da177e4 | 188 | .matches = { |
e56e57f6 DJ |
189 | DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), |
190 | DMI_MATCH(DMI_PRODUCT_NAME, "MacBook5"), | |
1da177e4 LT |
191 | }, |
192 | }, | |
140fd4ac HM |
193 | { /* Handle problems with rebooting on Apple MacBook6,1 */ |
194 | .callback = set_pci_reboot, | |
195 | .ident = "Apple MacBook6,1", | |
196 | .matches = { | |
197 | DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), | |
198 | DMI_MATCH(DMI_PRODUCT_NAME, "MacBook6,1"), | |
199 | }, | |
200 | }, | |
e56e57f6 DJ |
201 | { /* Handle problems with rebooting on Apple MacBookPro5 */ |
202 | .callback = set_pci_reboot, | |
203 | .ident = "Apple MacBookPro5", | |
1da177e4 | 204 | .matches = { |
e56e57f6 DJ |
205 | DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), |
206 | DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro5"), | |
1da177e4 LT |
207 | }, |
208 | }, | |
e56e57f6 DJ |
209 | { /* Handle problems with rebooting on Apple Macmini3,1 */ |
210 | .callback = set_pci_reboot, | |
211 | .ident = "Apple Macmini3,1", | |
df2edcf3 | 212 | .matches = { |
e56e57f6 DJ |
213 | DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), |
214 | DMI_MATCH(DMI_PRODUCT_NAME, "Macmini3,1"), | |
df2edcf3 JJ |
215 | }, |
216 | }, | |
e56e57f6 DJ |
217 | { /* Handle problems with rebooting on the iMac9,1. */ |
218 | .callback = set_pci_reboot, | |
219 | .ident = "Apple iMac9,1", | |
fc115bf1 | 220 | .matches = { |
e56e57f6 DJ |
221 | DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), |
222 | DMI_MATCH(DMI_PRODUCT_NAME, "iMac9,1"), | |
fc115bf1 CK |
223 | }, |
224 | }, | |
2f0c0b2d MK |
225 | { /* Handle problems with rebooting on the iMac10,1. */ |
226 | .callback = set_pci_reboot, | |
227 | .ident = "Apple iMac10,1", | |
228 | .matches = { | |
229 | DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), | |
230 | DMI_MATCH(DMI_PRODUCT_NAME, "iMac10,1"), | |
231 | }, | |
232 | }, | |
e56e57f6 | 233 | |
80313b30 SLH |
234 | /* ASRock */ |
235 | { /* Handle problems with rebooting on ASRock Q1900DC-ITX */ | |
236 | .callback = set_pci_reboot, | |
237 | .ident = "ASRock Q1900DC-ITX", | |
238 | .matches = { | |
239 | DMI_MATCH(DMI_BOARD_VENDOR, "ASRock"), | |
240 | DMI_MATCH(DMI_BOARD_NAME, "Q1900DC-ITX"), | |
241 | }, | |
242 | }, | |
243 | ||
e56e57f6 DJ |
244 | /* ASUS */ |
245 | { /* Handle problems with rebooting on ASUS P4S800 */ | |
fc1c8925 | 246 | .callback = set_bios_reboot, |
e56e57f6 | 247 | .ident = "ASUS P4S800", |
fc1c8925 | 248 | .matches = { |
e56e57f6 DJ |
249 | DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), |
250 | DMI_MATCH(DMI_BOARD_NAME, "P4S800"), | |
fc1c8925 HAA |
251 | }, |
252 | }, | |
90b28ded MH |
253 | { /* Handle problems with rebooting on ASUS EeeBook X205TA */ |
254 | .callback = set_acpi_reboot, | |
255 | .ident = "ASUS EeeBook X205TA", | |
256 | .matches = { | |
257 | DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), | |
bba8376a | 258 | DMI_MATCH(DMI_PRODUCT_NAME, "X205TA"), |
90b28ded MH |
259 | }, |
260 | }, | |
3b3e7855 MH |
261 | { /* Handle problems with rebooting on ASUS EeeBook X205TAW */ |
262 | .callback = set_acpi_reboot, | |
263 | .ident = "ASUS EeeBook X205TAW", | |
264 | .matches = { | |
265 | DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), | |
266 | DMI_MATCH(DMI_PRODUCT_NAME, "X205TAW"), | |
267 | }, | |
268 | }, | |
e56e57f6 | 269 | |
aadca6fa CG |
270 | /* Certec */ |
271 | { /* Handle problems with rebooting on Certec BPC600 */ | |
272 | .callback = set_pci_reboot, | |
273 | .ident = "Certec BPC600", | |
274 | .matches = { | |
275 | DMI_MATCH(DMI_SYS_VENDOR, "Certec"), | |
276 | DMI_MATCH(DMI_PRODUCT_NAME, "BPC600"), | |
277 | }, | |
278 | }, | |
279 | ||
e56e57f6 DJ |
280 | /* Dell */ |
281 | { /* Handle problems with rebooting on Dell DXP061 */ | |
093bac15 | 282 | .callback = set_bios_reboot, |
e56e57f6 | 283 | .ident = "Dell DXP061", |
093bac15 SC |
284 | .matches = { |
285 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
e56e57f6 | 286 | DMI_MATCH(DMI_PRODUCT_NAME, "Dell DXP061"), |
093bac15 SC |
287 | }, |
288 | }, | |
e56e57f6 | 289 | { /* Handle problems with rebooting on Dell E520's */ |
4a4aca64 | 290 | .callback = set_bios_reboot, |
e56e57f6 | 291 | .ident = "Dell E520", |
4a4aca64 JD |
292 | .matches = { |
293 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
e56e57f6 | 294 | DMI_MATCH(DMI_PRODUCT_NAME, "Dell DM061"), |
4a4aca64 JD |
295 | }, |
296 | }, | |
986189f9 LT |
297 | { /* Handle problems with rebooting on the Latitude E5410. */ |
298 | .callback = set_pci_reboot, | |
299 | .ident = "Dell Latitude E5410", | |
35ea63d7 LO |
300 | .matches = { |
301 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
986189f9 | 302 | DMI_MATCH(DMI_PRODUCT_NAME, "Latitude E5410"), |
35ea63d7 LO |
303 | }, |
304 | }, | |
e56e57f6 DJ |
305 | { /* Handle problems with rebooting on the Latitude E5420. */ |
306 | .callback = set_pci_reboot, | |
307 | .ident = "Dell Latitude E5420", | |
1da177e4 | 308 | .matches = { |
35ea63d7 | 309 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
e56e57f6 | 310 | DMI_MATCH(DMI_PRODUCT_NAME, "Latitude E5420"), |
1da177e4 LT |
311 | }, |
312 | }, | |
e56e57f6 DJ |
313 | { /* Handle problems with rebooting on the Latitude E6320. */ |
314 | .callback = set_pci_reboot, | |
315 | .ident = "Dell Latitude E6320", | |
fab3b58d IM |
316 | .matches = { |
317 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
e56e57f6 | 318 | DMI_MATCH(DMI_PRODUCT_NAME, "Latitude E6320"), |
fab3b58d IM |
319 | }, |
320 | }, | |
e56e57f6 DJ |
321 | { /* Handle problems with rebooting on the Latitude E6420. */ |
322 | .callback = set_pci_reboot, | |
323 | .ident = "Dell Latitude E6420", | |
890ffedc TB |
324 | .matches = { |
325 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
e56e57f6 | 326 | DMI_MATCH(DMI_PRODUCT_NAME, "Latitude E6420"), |
890ffedc TB |
327 | }, |
328 | }, | |
e56e57f6 | 329 | { /* Handle problems with rebooting on Dell Optiplex 330 with 0KP561 */ |
d91b14c4 | 330 | .callback = set_bios_reboot, |
e56e57f6 | 331 | .ident = "Dell OptiPlex 330", |
d91b14c4 | 332 | .matches = { |
890ffedc | 333 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
e56e57f6 DJ |
334 | DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 330"), |
335 | DMI_MATCH(DMI_BOARD_NAME, "0KP561"), | |
d91b14c4 TV |
336 | }, |
337 | }, | |
e56e57f6 | 338 | { /* Handle problems with rebooting on Dell Optiplex 360 with 0T656F */ |
dd4124a8 | 339 | .callback = set_bios_reboot, |
e56e57f6 | 340 | .ident = "Dell OptiPlex 360", |
dd4124a8 LO |
341 | .matches = { |
342 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
e56e57f6 DJ |
343 | DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 360"), |
344 | DMI_MATCH(DMI_BOARD_NAME, "0T656F"), | |
dd4124a8 LO |
345 | }, |
346 | }, | |
e56e57f6 | 347 | { /* Handle problems with rebooting on Dell Optiplex 745's SFF */ |
c5da9a2b | 348 | .callback = set_bios_reboot, |
e56e57f6 | 349 | .ident = "Dell OptiPlex 745", |
c5da9a2b AC |
350 | .matches = { |
351 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
e56e57f6 | 352 | DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 745"), |
c5da9a2b AC |
353 | }, |
354 | }, | |
e56e57f6 | 355 | { /* Handle problems with rebooting on Dell Optiplex 745's DFF */ |
88dff493 | 356 | .callback = set_bios_reboot, |
e56e57f6 | 357 | .ident = "Dell OptiPlex 745", |
88dff493 | 358 | .matches = { |
c5da9a2b | 359 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
e56e57f6 DJ |
360 | DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 745"), |
361 | DMI_MATCH(DMI_BOARD_NAME, "0MM599"), | |
88dff493 ZR |
362 | }, |
363 | }, | |
e56e57f6 | 364 | { /* Handle problems with rebooting on Dell Optiplex 745 with 0KW626 */ |
4832ddda | 365 | .callback = set_bios_reboot, |
e56e57f6 | 366 | .ident = "Dell OptiPlex 745", |
b49c78d4 | 367 | .matches = { |
e56e57f6 DJ |
368 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
369 | DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 745"), | |
370 | DMI_MATCH(DMI_BOARD_NAME, "0KW626"), | |
b49c78d4 PC |
371 | }, |
372 | }, | |
e56e57f6 | 373 | { /* Handle problems with rebooting on Dell OptiPlex 760 with 0G919G */ |
4832ddda | 374 | .callback = set_bios_reboot, |
e56e57f6 | 375 | .ident = "Dell OptiPlex 760", |
6c6c51e4 | 376 | .matches = { |
e56e57f6 DJ |
377 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
378 | DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 760"), | |
379 | DMI_MATCH(DMI_BOARD_NAME, "0G919G"), | |
6c6c51e4 PM |
380 | }, |
381 | }, | |
e56e57f6 | 382 | { /* Handle problems with rebooting on the OptiPlex 990. */ |
498cdbfb | 383 | .callback = set_pci_reboot, |
a729691b | 384 | .ident = "Dell OptiPlex 990 BIOS A0x", |
498cdbfb | 385 | .matches = { |
e56e57f6 DJ |
386 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
387 | DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 990"), | |
a729691b | 388 | DMI_MATCH(DMI_BIOS_VERSION, "A0"), |
498cdbfb OÇ |
389 | }, |
390 | }, | |
e56e57f6 DJ |
391 | { /* Handle problems with rebooting on Dell 300's */ |
392 | .callback = set_bios_reboot, | |
393 | .ident = "Dell PowerEdge 300", | |
05154752 | 394 | .matches = { |
e56e57f6 DJ |
395 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"), |
396 | DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge 300/"), | |
05154752 GH |
397 | }, |
398 | }, | |
e56e57f6 DJ |
399 | { /* Handle problems with rebooting on Dell 1300's */ |
400 | .callback = set_bios_reboot, | |
401 | .ident = "Dell PowerEdge 1300", | |
0a832320 | 402 | .matches = { |
e56e57f6 DJ |
403 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"), |
404 | DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge 1300/"), | |
0a832320 JM |
405 | }, |
406 | }, | |
e56e57f6 DJ |
407 | { /* Handle problems with rebooting on Dell 2400's */ |
408 | .callback = set_bios_reboot, | |
409 | .ident = "Dell PowerEdge 2400", | |
3628c3f5 | 410 | .matches = { |
e56e57f6 DJ |
411 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"), |
412 | DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge 2400"), | |
3628c3f5 MR |
413 | }, |
414 | }, | |
e56e57f6 | 415 | { /* Handle problems with rebooting on the Dell PowerEdge C6100. */ |
8412da75 | 416 | .callback = set_pci_reboot, |
e56e57f6 | 417 | .ident = "Dell PowerEdge C6100", |
8412da75 | 418 | .matches = { |
e56e57f6 DJ |
419 | DMI_MATCH(DMI_SYS_VENDOR, "Dell"), |
420 | DMI_MATCH(DMI_PRODUCT_NAME, "C6100"), | |
8412da75 VS |
421 | }, |
422 | }, | |
e56e57f6 | 423 | { /* Handle problems with rebooting on the Precision M6600. */ |
b7798d28 | 424 | .callback = set_pci_reboot, |
e56e57f6 | 425 | .ident = "Dell Precision M6600", |
b7798d28 DB |
426 | .matches = { |
427 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
e56e57f6 | 428 | DMI_MATCH(DMI_PRODUCT_NAME, "Precision M6600"), |
b7798d28 DB |
429 | }, |
430 | }, | |
e56e57f6 DJ |
431 | { /* Handle problems with rebooting on Dell T5400's */ |
432 | .callback = set_bios_reboot, | |
433 | .ident = "Dell Precision T5400", | |
a536877e PA |
434 | .matches = { |
435 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
e56e57f6 | 436 | DMI_MATCH(DMI_PRODUCT_NAME, "Precision WorkStation T5400"), |
a536877e PA |
437 | }, |
438 | }, | |
e56e57f6 DJ |
439 | { /* Handle problems with rebooting on Dell T7400's */ |
440 | .callback = set_bios_reboot, | |
441 | .ident = "Dell Precision T7400", | |
6be30bb7 RW |
442 | .matches = { |
443 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
e56e57f6 | 444 | DMI_MATCH(DMI_PRODUCT_NAME, "Precision WorkStation T7400"), |
6be30bb7 RW |
445 | }, |
446 | }, | |
e56e57f6 DJ |
447 | { /* Handle problems with rebooting on Dell XPS710 */ |
448 | .callback = set_bios_reboot, | |
449 | .ident = "Dell XPS710", | |
76eb9a30 ZR |
450 | .matches = { |
451 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
e56e57f6 | 452 | DMI_MATCH(DMI_PRODUCT_NAME, "Dell XPS710"), |
76eb9a30 ZR |
453 | }, |
454 | }, | |
4d581259 AH |
455 | { /* Handle problems with rebooting on Dell Optiplex 7450 AIO */ |
456 | .callback = set_acpi_reboot, | |
457 | .ident = "Dell OptiPlex 7450 AIO", | |
458 | .matches = { | |
459 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
460 | DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 7450 AIO"), | |
461 | }, | |
462 | }, | |
e56e57f6 DJ |
463 | |
464 | /* Hewlett-Packard */ | |
465 | { /* Handle problems with rebooting on HP laptops */ | |
466 | .callback = set_bios_reboot, | |
467 | .ident = "HP Compaq Laptop", | |
4f0acd31 | 468 | .matches = { |
e56e57f6 DJ |
469 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), |
470 | DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq"), | |
4f0acd31 MS |
471 | }, |
472 | }, | |
e56e57f6 | 473 | |
4b2d8ca9 HK |
474 | { /* PCIe Wifi card isn't detected after reboot otherwise */ |
475 | .callback = set_pci_reboot, | |
476 | .ident = "Zotac ZBOX CI327 nano", | |
477 | .matches = { | |
478 | DMI_MATCH(DMI_SYS_VENDOR, "NA"), | |
479 | DMI_MATCH(DMI_PRODUCT_NAME, "ZBOX-CI327NANO-GS-01"), | |
480 | }, | |
481 | }, | |
482 | ||
e56e57f6 DJ |
483 | /* Sony */ |
484 | { /* Handle problems with rebooting on Sony VGN-Z540N */ | |
485 | .callback = set_bios_reboot, | |
486 | .ident = "Sony VGN-Z540N", | |
4f0acd31 | 487 | .matches = { |
e56e57f6 DJ |
488 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), |
489 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-Z540N"), | |
4f0acd31 MS |
490 | }, |
491 | }, | |
e76be3f9 LO |
492 | { /* Handle problems with rebooting on the Latitude E6520. */ |
493 | .callback = set_pci_reboot, | |
494 | .ident = "Dell Latitude E6520", | |
495 | .matches = { | |
496 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
497 | DMI_MATCH(DMI_PRODUCT_NAME, "Latitude E6520"), | |
498 | }, | |
499 | }, | |
01dc0f7c LO |
500 | { /* Handle problems with rebooting on the OptiPlex 790. */ |
501 | .callback = set_pci_reboot, | |
502 | .ident = "Dell OptiPlex 790", | |
503 | .matches = { | |
504 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
505 | DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 790"), | |
506 | }, | |
507 | }, | |
43c22527 LO |
508 | { /* Handle problems with rebooting on the OptiPlex 990. */ |
509 | .callback = set_pci_reboot, | |
510 | .ident = "Dell OptiPlex 990", | |
511 | .matches = { | |
512 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
513 | DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 990"), | |
514 | }, | |
515 | }, | |
17e47644 LO |
516 | { /* Handle problems with rebooting on the Latitude E6220. */ |
517 | .callback = set_pci_reboot, | |
518 | .ident = "Dell Latitude E6220", | |
519 | .matches = { | |
520 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
521 | DMI_MATCH(DMI_PRODUCT_NAME, "Latitude E6220"), | |
522 | }, | |
523 | }, | |
341cdfbb | 524 | { /* Handle problems with rebooting on the OptiPlex 390. */ |
525 | .callback = set_pci_reboot, | |
526 | .ident = "Dell OptiPlex 390", | |
527 | .matches = { | |
528 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
529 | DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 390"), | |
530 | }, | |
531 | }, | |
6c6c51e4 PM |
532 | { } |
533 | }; | |
534 | ||
57b16594 | 535 | static int __init reboot_init(void) |
6c6c51e4 | 536 | { |
44be28e9 MF |
537 | int rv; |
538 | ||
144d102b ML |
539 | /* |
540 | * Only do the DMI check if reboot_type hasn't been overridden | |
5955633e ML |
541 | * on the command line |
542 | */ | |
44be28e9 MF |
543 | if (!reboot_default) |
544 | return 0; | |
545 | ||
546 | /* | |
547 | * The DMI quirks table takes precedence. If no quirks entry | |
4ecf7191 SA |
548 | * matches and the ACPI Hardware Reduced bit is set and EFI |
549 | * runtime services are enabled, force EFI reboot. | |
44be28e9 MF |
550 | */ |
551 | rv = dmi_check_system(reboot_dmi_table); | |
552 | ||
4ecf7191 | 553 | if (!rv && efi_reboot_required() && !efi_runtime_disabled()) |
44be28e9 MF |
554 | reboot_type = BOOT_EFI; |
555 | ||
6c6c51e4 PM |
556 | return 0; |
557 | } | |
57b16594 | 558 | core_initcall(reboot_init); |
6c6c51e4 | 559 | |
4d022e35 MB |
560 | static inline void kb_wait(void) |
561 | { | |
562 | int i; | |
563 | ||
c84d6af8 AC |
564 | for (i = 0; i < 0x10000; i++) { |
565 | if ((inb(0x64) & 0x02) == 0) | |
4d022e35 | 566 | break; |
c84d6af8 AC |
567 | udelay(2); |
568 | } | |
4d022e35 MB |
569 | } |
570 | ||
9c48f1c6 | 571 | static void vmxoff_nmi(int cpu, struct pt_regs *regs) |
d176720d EH |
572 | { |
573 | cpu_emergency_vmxoff(); | |
574 | } | |
575 | ||
144d102b | 576 | /* Use NMIs as IPIs to tell all CPUs to disable virtualization */ |
d176720d EH |
577 | static void emergency_vmx_disable_all(void) |
578 | { | |
579 | /* Just make sure we won't change CPUs while doing this */ | |
580 | local_irq_disable(); | |
581 | ||
144d102b | 582 | /* |
ed727361 SC |
583 | * Disable VMX on all CPUs before rebooting, otherwise we risk hanging |
584 | * the machine, because the CPU blocks INIT when it's in VMX root. | |
d176720d | 585 | * |
ed727361 SC |
586 | * We can't take any locks and we may be on an inconsistent state, so |
587 | * use NMIs as IPIs to tell the other CPUs to exit VMX root and halt. | |
d176720d | 588 | * |
ed727361 SC |
589 | * Do the NMI shootdown even if VMX if off on _this_ CPU, as that |
590 | * doesn't prevent a different CPU from being in VMX root operation. | |
d176720d | 591 | */ |
ed727361 SC |
592 | if (cpu_has_vmx()) { |
593 | /* Safely force _this_ CPU out of VMX root operation. */ | |
594 | __cpu_emergency_vmxoff(); | |
d176720d | 595 | |
ed727361 | 596 | /* Halt and exit VMX root operation on the other CPUs. */ |
d176720d | 597 | nmi_shootdown_cpus(vmxoff_nmi); |
d176720d EH |
598 | } |
599 | } | |
600 | ||
601 | ||
7432d149 IM |
602 | void __attribute__((weak)) mach_reboot_fixups(void) |
603 | { | |
604 | } | |
605 | ||
660e34ce | 606 | /* |
5be44a6f IM |
607 | * To the best of our knowledge Windows compatible x86 hardware expects |
608 | * the following on reboot: | |
660e34ce MG |
609 | * |
610 | * 1) If the FADT has the ACPI reboot register flag set, try it | |
611 | * 2) If still alive, write to the keyboard controller | |
612 | * 3) If still alive, write to the ACPI reboot register again | |
613 | * 4) If still alive, write to the keyboard controller again | |
a4f1987e | 614 | * 5) If still alive, call the EFI runtime service to reboot |
5be44a6f | 615 | * 6) If no EFI runtime service, call the BIOS to do a reboot |
660e34ce | 616 | * |
5be44a6f IM |
617 | * We default to following the same pattern. We also have |
618 | * two other reboot methods: 'triple fault' and 'PCI', which | |
619 | * can be triggered via the reboot= kernel boot option or | |
620 | * via quirks. | |
621 | * | |
622 | * This means that this function can never return, it can misbehave | |
623 | * by not rebooting properly and hanging. | |
660e34ce | 624 | */ |
416e2d63 | 625 | static void native_machine_emergency_restart(void) |
1da177e4 | 626 | { |
4d022e35 | 627 | int i; |
660e34ce MG |
628 | int attempt = 0; |
629 | int orig_reboot_type = reboot_type; | |
edf2b139 | 630 | unsigned short mode; |
4d022e35 | 631 | |
d176720d EH |
632 | if (reboot_emergency) |
633 | emergency_vmx_disable_all(); | |
634 | ||
840c2baf JC |
635 | tboot_shutdown(TB_SHUTDOWN_REBOOT); |
636 | ||
4d022e35 | 637 | /* Tell the BIOS if we want cold or warm reboot */ |
edf2b139 RH |
638 | mode = reboot_mode == REBOOT_WARM ? 0x1234 : 0; |
639 | *((unsigned short *)__va(0x472)) = mode; | |
4d022e35 | 640 | |
87615a34 MF |
641 | /* |
642 | * If an EFI capsule has been registered with the firmware then | |
643 | * override the reboot= parameter. | |
644 | */ | |
645 | if (efi_capsule_pending(NULL)) { | |
646 | pr_info("EFI capsule is pending, forcing EFI reboot.\n"); | |
647 | reboot_type = BOOT_EFI; | |
648 | } | |
649 | ||
4d022e35 MB |
650 | for (;;) { |
651 | /* Could also try the reset bit in the Hammer NB */ | |
652 | switch (reboot_type) { | |
5be44a6f IM |
653 | case BOOT_ACPI: |
654 | acpi_reboot(); | |
655 | reboot_type = BOOT_KBD; | |
656 | break; | |
657 | ||
4d022e35 | 658 | case BOOT_KBD: |
144d102b | 659 | mach_reboot_fixups(); /* For board specific fixups */ |
7432d149 | 660 | |
4d022e35 MB |
661 | for (i = 0; i < 10; i++) { |
662 | kb_wait(); | |
663 | udelay(50); | |
144d102b | 664 | outb(0xfe, 0x64); /* Pulse reset low */ |
4d022e35 MB |
665 | udelay(50); |
666 | } | |
660e34ce MG |
667 | if (attempt == 0 && orig_reboot_type == BOOT_ACPI) { |
668 | attempt = 1; | |
669 | reboot_type = BOOT_ACPI; | |
670 | } else { | |
a4f1987e | 671 | reboot_type = BOOT_EFI; |
660e34ce MG |
672 | } |
673 | break; | |
4d022e35 | 674 | |
4d022e35 | 675 | case BOOT_EFI: |
8562c99c | 676 | efi_reboot(reboot_mode, NULL); |
5be44a6f IM |
677 | reboot_type = BOOT_BIOS; |
678 | break; | |
679 | ||
680 | case BOOT_BIOS: | |
681 | machine_real_restart(MRR_BIOS); | |
682 | ||
683 | /* We're probably dead after this, but... */ | |
684 | reboot_type = BOOT_CF9_SAFE; | |
14d7ca5c | 685 | break; |
4d022e35 | 686 | |
5be44a6f | 687 | case BOOT_CF9_FORCE: |
14d7ca5c | 688 | port_cf9_safe = true; |
df561f66 | 689 | fallthrough; |
4d022e35 | 690 | |
5be44a6f | 691 | case BOOT_CF9_SAFE: |
14d7ca5c | 692 | if (port_cf9_safe) { |
5be44a6f | 693 | u8 reboot_code = reboot_mode == REBOOT_WARM ? 0x06 : 0x0E; |
16c21ae5 | 694 | u8 cf9 = inb(0xcf9) & ~reboot_code; |
14d7ca5c PA |
695 | outb(cf9|2, 0xcf9); /* Request hard reset */ |
696 | udelay(50); | |
16c21ae5 LF |
697 | /* Actually do the reset */ |
698 | outb(cf9|reboot_code, 0xcf9); | |
14d7ca5c PA |
699 | udelay(50); |
700 | } | |
5be44a6f IM |
701 | reboot_type = BOOT_TRIPLE; |
702 | break; | |
703 | ||
704 | case BOOT_TRIPLE: | |
8ec9069a | 705 | idt_invalidate(); |
5be44a6f IM |
706 | __asm__ __volatile__("int3"); |
707 | ||
708 | /* We're probably dead after this, but... */ | |
709 | reboot_type = BOOT_KBD; | |
4d022e35 MB |
710 | break; |
711 | } | |
712 | } | |
713 | } | |
714 | ||
3c62c625 | 715 | void native_machine_shutdown(void) |
4d022e35 MB |
716 | { |
717 | /* Stop the cpus and apics */ | |
522e6646 | 718 | #ifdef CONFIG_X86_IO_APIC |
2885432a FY |
719 | /* |
720 | * Disabling IO APIC before local APIC is a workaround for | |
721 | * erratum AVR31 in "Intel Atom Processor C2000 Product Family | |
722 | * Specification Update". In this situation, interrupts that target | |
723 | * a Logical Processor whose Local APIC is either in the process of | |
724 | * being hardware disabled or software disabled are neither delivered | |
725 | * nor discarded. When this erratum occurs, the processor may hang. | |
726 | * | |
727 | * Even without the erratum, it still makes sense to quiet IO APIC | |
728 | * before disabling Local APIC. | |
729 | */ | |
339b2ae0 | 730 | clear_IO_APIC(); |
522e6646 FY |
731 | #endif |
732 | ||
1da177e4 | 733 | #ifdef CONFIG_SMP |
144d102b | 734 | /* |
1b3a5d02 RH |
735 | * Stop all of the others. Also disable the local irq to |
736 | * not receive the per-cpu timer interrupt which may trigger | |
737 | * scheduler's load balance. | |
1da177e4 | 738 | */ |
55c844a4 | 739 | local_irq_disable(); |
76fac077 | 740 | stop_other_cpus(); |
4d022e35 | 741 | #endif |
1da177e4 LT |
742 | |
743 | lapic_shutdown(); | |
339b2ae0 | 744 | restore_boot_irq_mode(); |
1da177e4 | 745 | |
c86c7fbc OH |
746 | #ifdef CONFIG_HPET_TIMER |
747 | hpet_disable(); | |
748 | #endif | |
dd2a1305 | 749 | |
4d022e35 | 750 | #ifdef CONFIG_X86_64 |
338bac52 | 751 | x86_platform.iommu_shutdown(); |
4d022e35 | 752 | #endif |
973efae2 JF |
753 | } |
754 | ||
d176720d EH |
755 | static void __machine_emergency_restart(int emergency) |
756 | { | |
757 | reboot_emergency = emergency; | |
758 | machine_ops.emergency_restart(); | |
759 | } | |
760 | ||
416e2d63 | 761 | static void native_machine_restart(char *__unused) |
dd2a1305 | 762 | { |
c767a54b | 763 | pr_notice("machine restart\n"); |
1da177e4 | 764 | |
4d022e35 MB |
765 | if (!reboot_force) |
766 | machine_shutdown(); | |
d176720d | 767 | __machine_emergency_restart(0); |
4a1421f8 EB |
768 | } |
769 | ||
416e2d63 | 770 | static void native_machine_halt(void) |
1da177e4 | 771 | { |
144d102b | 772 | /* Stop other cpus and apics */ |
d3ec5cae IV |
773 | machine_shutdown(); |
774 | ||
840c2baf JC |
775 | tboot_shutdown(TB_SHUTDOWN_HALT); |
776 | ||
d3ec5cae | 777 | stop_this_cpu(NULL); |
1da177e4 LT |
778 | } |
779 | ||
416e2d63 | 780 | static void native_machine_power_off(void) |
1da177e4 | 781 | { |
6e3fbee5 | 782 | if (pm_power_off) { |
4d022e35 MB |
783 | if (!reboot_force) |
784 | machine_shutdown(); | |
1da177e4 | 785 | pm_power_off(); |
6e3fbee5 | 786 | } |
144d102b | 787 | /* A fallback in case there is no PM info available */ |
840c2baf | 788 | tboot_shutdown(TB_SHUTDOWN_HALT); |
1da177e4 LT |
789 | } |
790 | ||
404f6aac | 791 | struct machine_ops machine_ops __ro_after_init = { |
416e2d63 JB |
792 | .power_off = native_machine_power_off, |
793 | .shutdown = native_machine_shutdown, | |
794 | .emergency_restart = native_machine_emergency_restart, | |
795 | .restart = native_machine_restart, | |
ed23dc6f | 796 | .halt = native_machine_halt, |
2965faa5 | 797 | #ifdef CONFIG_KEXEC_CORE |
ed23dc6f GC |
798 | .crash_shutdown = native_machine_crash_shutdown, |
799 | #endif | |
07f3331c | 800 | }; |
416e2d63 JB |
801 | |
802 | void machine_power_off(void) | |
803 | { | |
804 | machine_ops.power_off(); | |
805 | } | |
806 | ||
807 | void machine_shutdown(void) | |
808 | { | |
809 | machine_ops.shutdown(); | |
810 | } | |
811 | ||
812 | void machine_emergency_restart(void) | |
813 | { | |
d176720d | 814 | __machine_emergency_restart(1); |
416e2d63 JB |
815 | } |
816 | ||
817 | void machine_restart(char *cmd) | |
818 | { | |
819 | machine_ops.restart(cmd); | |
820 | } | |
821 | ||
822 | void machine_halt(void) | |
823 | { | |
824 | machine_ops.halt(); | |
825 | } | |
826 | ||
2965faa5 | 827 | #ifdef CONFIG_KEXEC_CORE |
ed23dc6f GC |
828 | void machine_crash_shutdown(struct pt_regs *regs) |
829 | { | |
830 | machine_ops.crash_shutdown(regs); | |
831 | } | |
832 | #endif | |
2ddded21 EH |
833 | |
834 | ||
5bc32950 XP |
835 | /* This is the CPU performing the emergency shutdown work. */ |
836 | int crashing_cpu = -1; | |
837 | ||
bb8dd270 | 838 | #if defined(CONFIG_SMP) |
2ddded21 | 839 | |
2ddded21 EH |
840 | static nmi_shootdown_cb shootdown_callback; |
841 | ||
842 | static atomic_t waiting_for_crash_ipi; | |
58c5661f | 843 | static int crash_ipi_issued; |
2ddded21 | 844 | |
9c48f1c6 | 845 | static int crash_nmi_callback(unsigned int val, struct pt_regs *regs) |
2ddded21 EH |
846 | { |
847 | int cpu; | |
848 | ||
2ddded21 EH |
849 | cpu = raw_smp_processor_id(); |
850 | ||
144d102b ML |
851 | /* |
852 | * Don't do anything if this handler is invoked on crashing cpu. | |
2ddded21 EH |
853 | * Otherwise, system will completely hang. Crashing cpu can get |
854 | * an NMI if system was initially booted with nmi_watchdog parameter. | |
855 | */ | |
856 | if (cpu == crashing_cpu) | |
9c48f1c6 | 857 | return NMI_HANDLED; |
2ddded21 EH |
858 | local_irq_disable(); |
859 | ||
9c48f1c6 | 860 | shootdown_callback(cpu, regs); |
2ddded21 EH |
861 | |
862 | atomic_dec(&waiting_for_crash_ipi); | |
863 | /* Assume hlt works */ | |
864 | halt(); | |
865 | for (;;) | |
866 | cpu_relax(); | |
867 | ||
9c48f1c6 | 868 | return NMI_HANDLED; |
2ddded21 EH |
869 | } |
870 | ||
144d102b ML |
871 | /* |
872 | * Halt all other CPUs, calling the specified function on each of them | |
bb8dd270 EH |
873 | * |
874 | * This function can be used to halt all other CPUs on crash | |
875 | * or emergency reboot time. The function passed as parameter | |
876 | * will be called inside a NMI handler on all CPUs. | |
877 | */ | |
2ddded21 EH |
878 | void nmi_shootdown_cpus(nmi_shootdown_cb callback) |
879 | { | |
880 | unsigned long msecs; | |
c415b3dc | 881 | local_irq_disable(); |
2ddded21 | 882 | |
144d102b | 883 | /* Make a note of crashing cpu. Will be used in NMI callback. */ |
2ddded21 EH |
884 | crashing_cpu = safe_smp_processor_id(); |
885 | ||
886 | shootdown_callback = callback; | |
887 | ||
888 | atomic_set(&waiting_for_crash_ipi, num_online_cpus() - 1); | |
889 | /* Would it be better to replace the trap vector here? */ | |
9c48f1c6 DZ |
890 | if (register_nmi_handler(NMI_LOCAL, crash_nmi_callback, |
891 | NMI_FLAG_FIRST, "crash")) | |
144d102b ML |
892 | return; /* Return what? */ |
893 | /* | |
894 | * Ensure the new callback function is set before sending | |
2ddded21 EH |
895 | * out the NMI |
896 | */ | |
897 | wmb(); | |
898 | ||
22ca7ee9 | 899 | apic_send_IPI_allbutself(NMI_VECTOR); |
2ddded21 | 900 | |
58c5661f HK |
901 | /* Kick CPUs looping in NMI context. */ |
902 | WRITE_ONCE(crash_ipi_issued, 1); | |
903 | ||
2ddded21 EH |
904 | msecs = 1000; /* Wait at most a second for the other cpus to stop */ |
905 | while ((atomic_read(&waiting_for_crash_ipi) > 0) && msecs) { | |
906 | mdelay(1); | |
907 | msecs--; | |
908 | } | |
909 | ||
910 | /* Leave the nmi callback set */ | |
911 | } | |
58c5661f | 912 | |
b279d67d HK |
913 | /* |
914 | * Check if the crash dumping IPI got issued and if so, call its callback | |
915 | * directly. This function is used when we have already been in NMI handler. | |
916 | * It doesn't return. | |
917 | */ | |
918 | void run_crash_ipi_callback(struct pt_regs *regs) | |
919 | { | |
920 | if (crash_ipi_issued) | |
921 | crash_nmi_callback(0, regs); | |
922 | } | |
923 | ||
58c5661f HK |
924 | /* Override the weak function in kernel/panic.c */ |
925 | void nmi_panic_self_stop(struct pt_regs *regs) | |
926 | { | |
927 | while (1) { | |
b279d67d HK |
928 | /* If no CPU is preparing crash dump, we simply loop here. */ |
929 | run_crash_ipi_callback(regs); | |
58c5661f HK |
930 | cpu_relax(); |
931 | } | |
932 | } | |
933 | ||
bb8dd270 EH |
934 | #else /* !CONFIG_SMP */ |
935 | void nmi_shootdown_cpus(nmi_shootdown_cb callback) | |
936 | { | |
937 | /* No other CPUs to shoot down */ | |
938 | } | |
b279d67d HK |
939 | |
940 | void run_crash_ipi_callback(struct pt_regs *regs) | |
941 | { | |
942 | } | |
2ddded21 | 943 | #endif |