Commit | Line | Data |
---|---|---|
c767a54b JP |
1 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
2 | ||
1da177e4 | 3 | #include <linux/module.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> |
4d37e7e3 | 15 | #include <asm/desc.h> |
4d022e35 | 16 | #include <asm/hpet.h> |
68db065c | 17 | #include <asm/pgtable.h> |
4412620f | 18 | #include <asm/proto.h> |
973efae2 | 19 | #include <asm/reboot_fixups.h> |
07f3331c | 20 | #include <asm/reboot.h> |
82487711 | 21 | #include <asm/pci_x86.h> |
d176720d | 22 | #include <asm/virtext.h> |
96b89dc6 | 23 | #include <asm/cpu.h> |
c410b830 | 24 | #include <asm/nmi.h> |
65051397 | 25 | #include <asm/smp.h> |
1da177e4 | 26 | |
65051397 PA |
27 | #include <linux/ctype.h> |
28 | #include <linux/mc146818rtc.h> | |
29 | #include <asm/realmode.h> | |
30 | #include <asm/x86_init.h> | |
4d022e35 | 31 | |
1da177e4 LT |
32 | /* |
33 | * Power off function, if any | |
34 | */ | |
35 | void (*pm_power_off)(void); | |
129f6946 | 36 | EXPORT_SYMBOL(pm_power_off); |
1da177e4 | 37 | |
ebdd561a | 38 | static const struct desc_ptr no_idt = {}; |
4d022e35 | 39 | |
144d102b ML |
40 | /* |
41 | * This is set if we need to go through the 'emergency' path. | |
d176720d EH |
42 | * When machine_emergency_restart() is called, we may be on |
43 | * an inconsistent state and won't be able to do a clean cleanup | |
44 | */ | |
45 | static int reboot_emergency; | |
46 | ||
14d7ca5c PA |
47 | /* This is set by the PCI code if either type 1 or type 2 PCI is detected */ |
48 | bool port_cf9_safe = false; | |
49 | ||
1da177e4 LT |
50 | /* |
51 | * Reboot options and system auto-detection code provided by | |
52 | * Dell Inc. so their systems "just work". :-) | |
53 | */ | |
54 | ||
55 | /* | |
1ef03890 | 56 | * Some machines require the "reboot=b" or "reboot=k" commandline options, |
4d022e35 | 57 | * this quirk makes that automatic. |
1da177e4 | 58 | */ |
1855256c | 59 | static int __init set_bios_reboot(const struct dmi_system_id *d) |
1da177e4 | 60 | { |
4d022e35 MB |
61 | if (reboot_type != BOOT_BIOS) { |
62 | reboot_type = BOOT_BIOS; | |
c767a54b JP |
63 | pr_info("%s series board detected. Selecting %s-method for reboots.\n", |
64 | "BIOS", d->ident); | |
1da177e4 LT |
65 | } |
66 | return 0; | |
67 | } | |
68 | ||
65051397 | 69 | void __noreturn machine_real_restart(unsigned int type) |
57b16594 | 70 | { |
57b16594 ML |
71 | local_irq_disable(); |
72 | ||
144d102b ML |
73 | /* |
74 | * Write zero to CMOS register number 0x0f, which the BIOS POST | |
75 | * routine will recognize as telling it to do a proper reboot. (Well | |
76 | * that's what this book in front of me says -- it may only apply to | |
77 | * the Phoenix BIOS though, it's not clear). At the same time, | |
78 | * disable NMIs by setting the top bit in the CMOS address register, | |
79 | * as we're about to do peculiar things to the CPU. I'm not sure if | |
80 | * `outb_p' is needed instead of just `outb'. Use it to be on the | |
81 | * safe side. (Yes, CMOS_WRITE does outb_p's. - Paul G.) | |
57b16594 ML |
82 | */ |
83 | spin_lock(&rtc_lock); | |
84 | CMOS_WRITE(0x00, 0x8f); | |
85 | spin_unlock(&rtc_lock); | |
86 | ||
87 | /* | |
88 | * Switch back to the initial page table. | |
89 | */ | |
65051397 | 90 | #ifdef CONFIG_X86_32 |
57b16594 | 91 | load_cr3(initial_page_table); |
65051397 PA |
92 | #else |
93 | write_cr3(real_mode_header->trampoline_pgd); | |
94 | #endif | |
57b16594 | 95 | |
57b16594 | 96 | /* Jump to the identity-mapped low memory code */ |
65051397 PA |
97 | #ifdef CONFIG_X86_32 |
98 | asm volatile("jmpl *%0" : : | |
99 | "rm" (real_mode_header->machine_real_restart_asm), | |
100 | "a" (type)); | |
101 | #else | |
102 | asm volatile("ljmpl *%0" : : | |
103 | "m" (real_mode_header->machine_real_restart_asm), | |
104 | "D" (type)); | |
105 | #endif | |
106 | unreachable(); | |
57b16594 ML |
107 | } |
108 | #ifdef CONFIG_APM_MODULE | |
109 | EXPORT_SYMBOL(machine_real_restart); | |
110 | #endif | |
111 | ||
57b16594 ML |
112 | /* |
113 | * Some Apple MacBook and MacBookPro's needs reboot=p to be able to reboot | |
114 | */ | |
115 | static int __init set_pci_reboot(const struct dmi_system_id *d) | |
116 | { | |
117 | if (reboot_type != BOOT_CF9) { | |
118 | reboot_type = BOOT_CF9; | |
c767a54b JP |
119 | pr_info("%s series board detected. Selecting %s-method for reboots.\n", |
120 | "PCI", d->ident); | |
57b16594 ML |
121 | } |
122 | return 0; | |
123 | } | |
124 | ||
1ef03890 PC |
125 | static int __init set_kbd_reboot(const struct dmi_system_id *d) |
126 | { | |
127 | if (reboot_type != BOOT_KBD) { | |
128 | reboot_type = BOOT_KBD; | |
c767a54b JP |
129 | pr_info("%s series board detected. Selecting %s-method for reboot.\n", |
130 | "KBD", d->ident); | |
1ef03890 PC |
131 | } |
132 | return 0; | |
133 | } | |
134 | ||
144d102b | 135 | /* |
65051397 | 136 | * This is a single dmi_table handling all reboot quirks. |
57b16594 | 137 | */ |
1da177e4 | 138 | static struct dmi_system_id __initdata reboot_dmi_table[] = { |
b9e82af8 TG |
139 | { /* Handle problems with rebooting on Dell E520's */ |
140 | .callback = set_bios_reboot, | |
141 | .ident = "Dell E520", | |
142 | .matches = { | |
143 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
144 | DMI_MATCH(DMI_PRODUCT_NAME, "Dell DM061"), | |
145 | }, | |
146 | }, | |
1da177e4 | 147 | { /* Handle problems with rebooting on Dell 1300's */ |
dd2a1305 | 148 | .callback = set_bios_reboot, |
1da177e4 LT |
149 | .ident = "Dell PowerEdge 1300", |
150 | .matches = { | |
151 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"), | |
152 | DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge 1300/"), | |
153 | }, | |
154 | }, | |
155 | { /* Handle problems with rebooting on Dell 300's */ | |
156 | .callback = set_bios_reboot, | |
157 | .ident = "Dell PowerEdge 300", | |
158 | .matches = { | |
159 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"), | |
160 | DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge 300/"), | |
161 | }, | |
162 | }, | |
144d102b | 163 | { /* Handle problems with rebooting on Dell Optiplex 745's SFF */ |
df2edcf3 JJ |
164 | .callback = set_bios_reboot, |
165 | .ident = "Dell OptiPlex 745", | |
166 | .matches = { | |
167 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
168 | DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 745"), | |
df2edcf3 JJ |
169 | }, |
170 | }, | |
144d102b | 171 | { /* Handle problems with rebooting on Dell Optiplex 745's DFF */ |
fc115bf1 CK |
172 | .callback = set_bios_reboot, |
173 | .ident = "Dell OptiPlex 745", | |
174 | .matches = { | |
175 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
176 | DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 745"), | |
177 | DMI_MATCH(DMI_BOARD_NAME, "0MM599"), | |
178 | }, | |
179 | }, | |
144d102b | 180 | { /* Handle problems with rebooting on Dell Optiplex 745 with 0KW626 */ |
fc1c8925 HAA |
181 | .callback = set_bios_reboot, |
182 | .ident = "Dell OptiPlex 745", | |
183 | .matches = { | |
184 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
185 | DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 745"), | |
186 | DMI_MATCH(DMI_BOARD_NAME, "0KW626"), | |
187 | }, | |
188 | }, | |
144d102b | 189 | { /* Handle problems with rebooting on Dell Optiplex 330 with 0KP561 */ |
093bac15 SC |
190 | .callback = set_bios_reboot, |
191 | .ident = "Dell OptiPlex 330", | |
192 | .matches = { | |
193 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
194 | DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 330"), | |
195 | DMI_MATCH(DMI_BOARD_NAME, "0KP561"), | |
196 | }, | |
197 | }, | |
144d102b | 198 | { /* Handle problems with rebooting on Dell Optiplex 360 with 0T656F */ |
4a4aca64 JD |
199 | .callback = set_bios_reboot, |
200 | .ident = "Dell OptiPlex 360", | |
201 | .matches = { | |
202 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
203 | DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 360"), | |
204 | DMI_MATCH(DMI_BOARD_NAME, "0T656F"), | |
205 | }, | |
206 | }, | |
144d102b | 207 | { /* Handle problems with rebooting on Dell OptiPlex 760 with 0G919G */ |
35ea63d7 LO |
208 | .callback = set_bios_reboot, |
209 | .ident = "Dell OptiPlex 760", | |
210 | .matches = { | |
211 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
212 | DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 760"), | |
213 | DMI_MATCH(DMI_BOARD_NAME, "0G919G"), | |
214 | }, | |
215 | }, | |
1da177e4 LT |
216 | { /* Handle problems with rebooting on Dell 2400's */ |
217 | .callback = set_bios_reboot, | |
218 | .ident = "Dell PowerEdge 2400", | |
219 | .matches = { | |
220 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"), | |
221 | DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge 2400"), | |
222 | }, | |
223 | }, | |
fab3b58d IM |
224 | { /* Handle problems with rebooting on Dell T5400's */ |
225 | .callback = set_bios_reboot, | |
226 | .ident = "Dell Precision T5400", | |
227 | .matches = { | |
228 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
229 | DMI_MATCH(DMI_PRODUCT_NAME, "Precision WorkStation T5400"), | |
230 | }, | |
231 | }, | |
890ffedc TB |
232 | { /* Handle problems with rebooting on Dell T7400's */ |
233 | .callback = set_bios_reboot, | |
234 | .ident = "Dell Precision T7400", | |
235 | .matches = { | |
236 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
237 | DMI_MATCH(DMI_PRODUCT_NAME, "Precision WorkStation T7400"), | |
238 | }, | |
239 | }, | |
766c3f94 | 240 | { /* Handle problems with rebooting on HP laptops */ |
d91b14c4 | 241 | .callback = set_bios_reboot, |
766c3f94 | 242 | .ident = "HP Compaq Laptop", |
d91b14c4 TV |
243 | .matches = { |
244 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
766c3f94 | 245 | DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq"), |
d91b14c4 TV |
246 | }, |
247 | }, | |
dd4124a8 LO |
248 | { /* Handle problems with rebooting on Dell XPS710 */ |
249 | .callback = set_bios_reboot, | |
250 | .ident = "Dell XPS710", | |
251 | .matches = { | |
252 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
253 | DMI_MATCH(DMI_PRODUCT_NAME, "Dell XPS710"), | |
254 | }, | |
255 | }, | |
c5da9a2b AC |
256 | { /* Handle problems with rebooting on Dell DXP061 */ |
257 | .callback = set_bios_reboot, | |
258 | .ident = "Dell DXP061", | |
259 | .matches = { | |
260 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
261 | DMI_MATCH(DMI_PRODUCT_NAME, "Dell DXP061"), | |
262 | }, | |
263 | }, | |
88dff493 ZR |
264 | { /* Handle problems with rebooting on Sony VGN-Z540N */ |
265 | .callback = set_bios_reboot, | |
266 | .ident = "Sony VGN-Z540N", | |
267 | .matches = { | |
268 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
269 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-Z540N"), | |
270 | }, | |
271 | }, | |
144d102b | 272 | { /* Handle problems with rebooting on ASUS P4S800 */ |
4832ddda LO |
273 | .callback = set_bios_reboot, |
274 | .ident = "ASUS P4S800", | |
275 | .matches = { | |
276 | DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), | |
277 | DMI_MATCH(DMI_BOARD_NAME, "P4S800"), | |
278 | }, | |
279 | }, | |
57b16594 | 280 | |
144d102b | 281 | { /* Handle reboot issue on Acer Aspire one */ |
1ef03890 | 282 | .callback = set_kbd_reboot, |
b49c78d4 PC |
283 | .ident = "Acer Aspire One A110", |
284 | .matches = { | |
285 | DMI_MATCH(DMI_SYS_VENDOR, "Acer"), | |
286 | DMI_MATCH(DMI_PRODUCT_NAME, "AOA110"), | |
287 | }, | |
288 | }, | |
3e03bbea | 289 | { /* Handle problems with rebooting on Apple MacBook5 */ |
6c6c51e4 | 290 | .callback = set_pci_reboot, |
3e03bbea | 291 | .ident = "Apple MacBook5", |
6c6c51e4 PM |
292 | .matches = { |
293 | DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), | |
3e03bbea | 294 | DMI_MATCH(DMI_PRODUCT_NAME, "MacBook5"), |
6c6c51e4 PM |
295 | }, |
296 | }, | |
3e03bbea | 297 | { /* Handle problems with rebooting on Apple MacBookPro5 */ |
498cdbfb | 298 | .callback = set_pci_reboot, |
3e03bbea | 299 | .ident = "Apple MacBookPro5", |
498cdbfb OÇ |
300 | .matches = { |
301 | DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), | |
3e03bbea | 302 | DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro5"), |
498cdbfb OÇ |
303 | }, |
304 | }, | |
05154752 GH |
305 | { /* Handle problems with rebooting on Apple Macmini3,1 */ |
306 | .callback = set_pci_reboot, | |
307 | .ident = "Apple Macmini3,1", | |
308 | .matches = { | |
309 | DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), | |
310 | DMI_MATCH(DMI_PRODUCT_NAME, "Macmini3,1"), | |
311 | }, | |
312 | }, | |
0a832320 JM |
313 | { /* Handle problems with rebooting on the iMac9,1. */ |
314 | .callback = set_pci_reboot, | |
315 | .ident = "Apple iMac9,1", | |
316 | .matches = { | |
317 | DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), | |
318 | DMI_MATCH(DMI_PRODUCT_NAME, "iMac9,1"), | |
319 | }, | |
320 | }, | |
3628c3f5 MR |
321 | { /* Handle problems with rebooting on the Latitude E6320. */ |
322 | .callback = set_pci_reboot, | |
323 | .ident = "Dell Latitude E6320", | |
324 | .matches = { | |
325 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
326 | DMI_MATCH(DMI_PRODUCT_NAME, "Latitude E6320"), | |
327 | }, | |
328 | }, | |
8412da75 VS |
329 | { /* Handle problems with rebooting on the Latitude E5410. */ |
330 | .callback = set_pci_reboot, | |
331 | .ident = "Dell Latitude E5410", | |
332 | .matches = { | |
333 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
334 | DMI_MATCH(DMI_PRODUCT_NAME, "Latitude E5410"), | |
335 | }, | |
336 | }, | |
b7798d28 DB |
337 | { /* Handle problems with rebooting on the Latitude E5420. */ |
338 | .callback = set_pci_reboot, | |
339 | .ident = "Dell Latitude E5420", | |
340 | .matches = { | |
341 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
342 | DMI_MATCH(DMI_PRODUCT_NAME, "Latitude E5420"), | |
343 | }, | |
344 | }, | |
a536877e PA |
345 | { /* Handle problems with rebooting on the Latitude E6420. */ |
346 | .callback = set_pci_reboot, | |
347 | .ident = "Dell Latitude E6420", | |
348 | .matches = { | |
349 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
350 | DMI_MATCH(DMI_PRODUCT_NAME, "Latitude E6420"), | |
351 | }, | |
352 | }, | |
6be30bb7 RW |
353 | { /* Handle problems with rebooting on the OptiPlex 990. */ |
354 | .callback = set_pci_reboot, | |
355 | .ident = "Dell OptiPlex 990", | |
356 | .matches = { | |
357 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
358 | DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 990"), | |
359 | }, | |
360 | }, | |
76eb9a30 ZR |
361 | { /* Handle problems with rebooting on the Precision M6600. */ |
362 | .callback = set_pci_reboot, | |
7a20c2fa | 363 | .ident = "Dell Precision M6600", |
76eb9a30 ZR |
364 | .matches = { |
365 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
366 | DMI_MATCH(DMI_PRODUCT_NAME, "Precision M6600"), | |
367 | }, | |
368 | }, | |
4f0acd31 MS |
369 | { /* Handle problems with rebooting on the Dell PowerEdge C6100. */ |
370 | .callback = set_pci_reboot, | |
371 | .ident = "Dell PowerEdge C6100", | |
372 | .matches = { | |
373 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
374 | DMI_MATCH(DMI_PRODUCT_NAME, "C6100"), | |
375 | }, | |
376 | }, | |
377 | { /* Some C6100 machines were shipped with vendor being 'Dell'. */ | |
378 | .callback = set_pci_reboot, | |
379 | .ident = "Dell PowerEdge C6100", | |
380 | .matches = { | |
381 | DMI_MATCH(DMI_SYS_VENDOR, "Dell"), | |
382 | DMI_MATCH(DMI_PRODUCT_NAME, "C6100"), | |
383 | }, | |
384 | }, | |
6c6c51e4 PM |
385 | { } |
386 | }; | |
387 | ||
57b16594 | 388 | static int __init reboot_init(void) |
6c6c51e4 | 389 | { |
144d102b ML |
390 | /* |
391 | * Only do the DMI check if reboot_type hasn't been overridden | |
5955633e ML |
392 | * on the command line |
393 | */ | |
144d102b | 394 | if (reboot_default) |
57b16594 | 395 | dmi_check_system(reboot_dmi_table); |
6c6c51e4 PM |
396 | return 0; |
397 | } | |
57b16594 | 398 | core_initcall(reboot_init); |
6c6c51e4 | 399 | |
4d022e35 MB |
400 | static inline void kb_wait(void) |
401 | { | |
402 | int i; | |
403 | ||
c84d6af8 AC |
404 | for (i = 0; i < 0x10000; i++) { |
405 | if ((inb(0x64) & 0x02) == 0) | |
4d022e35 | 406 | break; |
c84d6af8 AC |
407 | udelay(2); |
408 | } | |
4d022e35 MB |
409 | } |
410 | ||
9c48f1c6 | 411 | static void vmxoff_nmi(int cpu, struct pt_regs *regs) |
d176720d EH |
412 | { |
413 | cpu_emergency_vmxoff(); | |
414 | } | |
415 | ||
144d102b | 416 | /* Use NMIs as IPIs to tell all CPUs to disable virtualization */ |
d176720d EH |
417 | static void emergency_vmx_disable_all(void) |
418 | { | |
419 | /* Just make sure we won't change CPUs while doing this */ | |
420 | local_irq_disable(); | |
421 | ||
144d102b ML |
422 | /* |
423 | * We need to disable VMX on all CPUs before rebooting, otherwise | |
d176720d EH |
424 | * we risk hanging up the machine, because the CPU ignore INIT |
425 | * signals when VMX is enabled. | |
426 | * | |
427 | * We can't take any locks and we may be on an inconsistent | |
428 | * state, so we use NMIs as IPIs to tell the other CPUs to disable | |
429 | * VMX and halt. | |
430 | * | |
431 | * For safety, we will avoid running the nmi_shootdown_cpus() | |
432 | * stuff unnecessarily, but we don't have a way to check | |
433 | * if other CPUs have VMX enabled. So we will call it only if the | |
434 | * CPU we are running on has VMX enabled. | |
435 | * | |
436 | * We will miss cases where VMX is not enabled on all CPUs. This | |
437 | * shouldn't do much harm because KVM always enable VMX on all | |
438 | * CPUs anyway. But we can miss it on the small window where KVM | |
439 | * is still enabling VMX. | |
440 | */ | |
441 | if (cpu_has_vmx() && cpu_vmx_enabled()) { | |
144d102b | 442 | /* Disable VMX on this CPU. */ |
d176720d EH |
443 | cpu_vmxoff(); |
444 | ||
445 | /* Halt and disable VMX on the other CPUs */ | |
446 | nmi_shootdown_cpus(vmxoff_nmi); | |
447 | ||
448 | } | |
449 | } | |
450 | ||
451 | ||
7432d149 IM |
452 | void __attribute__((weak)) mach_reboot_fixups(void) |
453 | { | |
454 | } | |
455 | ||
660e34ce MG |
456 | /* |
457 | * Windows compatible x86 hardware expects the following on reboot: | |
458 | * | |
459 | * 1) If the FADT has the ACPI reboot register flag set, try it | |
460 | * 2) If still alive, write to the keyboard controller | |
461 | * 3) If still alive, write to the ACPI reboot register again | |
462 | * 4) If still alive, write to the keyboard controller again | |
463 | * | |
464 | * If the machine is still alive at this stage, it gives up. We default to | |
465 | * following the same pattern, except that if we're still alive after (4) we'll | |
466 | * try to force a triple fault and then cycle between hitting the keyboard | |
467 | * controller and doing that | |
468 | */ | |
416e2d63 | 469 | static void native_machine_emergency_restart(void) |
1da177e4 | 470 | { |
4d022e35 | 471 | int i; |
660e34ce MG |
472 | int attempt = 0; |
473 | int orig_reboot_type = reboot_type; | |
edf2b139 | 474 | unsigned short mode; |
4d022e35 | 475 | |
d176720d EH |
476 | if (reboot_emergency) |
477 | emergency_vmx_disable_all(); | |
478 | ||
840c2baf JC |
479 | tboot_shutdown(TB_SHUTDOWN_REBOOT); |
480 | ||
4d022e35 | 481 | /* Tell the BIOS if we want cold or warm reboot */ |
edf2b139 RH |
482 | mode = reboot_mode == REBOOT_WARM ? 0x1234 : 0; |
483 | *((unsigned short *)__va(0x472)) = mode; | |
4d022e35 MB |
484 | |
485 | for (;;) { | |
486 | /* Could also try the reset bit in the Hammer NB */ | |
487 | switch (reboot_type) { | |
488 | case BOOT_KBD: | |
144d102b | 489 | mach_reboot_fixups(); /* For board specific fixups */ |
7432d149 | 490 | |
4d022e35 MB |
491 | for (i = 0; i < 10; i++) { |
492 | kb_wait(); | |
493 | udelay(50); | |
144d102b | 494 | outb(0xfe, 0x64); /* Pulse reset low */ |
4d022e35 MB |
495 | udelay(50); |
496 | } | |
660e34ce MG |
497 | if (attempt == 0 && orig_reboot_type == BOOT_ACPI) { |
498 | attempt = 1; | |
499 | reboot_type = BOOT_ACPI; | |
500 | } else { | |
501 | reboot_type = BOOT_TRIPLE; | |
502 | } | |
503 | break; | |
4d022e35 MB |
504 | |
505 | case BOOT_TRIPLE: | |
ebdd561a | 506 | load_idt(&no_idt); |
4d022e35 MB |
507 | __asm__ __volatile__("int3"); |
508 | ||
509 | reboot_type = BOOT_KBD; | |
510 | break; | |
511 | ||
4d022e35 | 512 | case BOOT_BIOS: |
3d35ac34 | 513 | machine_real_restart(MRR_BIOS); |
4d022e35 MB |
514 | |
515 | reboot_type = BOOT_KBD; | |
516 | break; | |
4d022e35 MB |
517 | |
518 | case BOOT_ACPI: | |
519 | acpi_reboot(); | |
520 | reboot_type = BOOT_KBD; | |
521 | break; | |
522 | ||
4d022e35 | 523 | case BOOT_EFI: |
83e68189 | 524 | if (efi_enabled(EFI_RUNTIME_SERVICES)) |
edf2b139 | 525 | efi.reset_system(reboot_mode == REBOOT_WARM ? |
14d7ca5c PA |
526 | EFI_RESET_WARM : |
527 | EFI_RESET_COLD, | |
4d022e35 | 528 | EFI_SUCCESS, 0, NULL); |
b47b9288 | 529 | reboot_type = BOOT_KBD; |
14d7ca5c | 530 | break; |
4d022e35 | 531 | |
14d7ca5c PA |
532 | case BOOT_CF9: |
533 | port_cf9_safe = true; | |
144d102b | 534 | /* Fall through */ |
4d022e35 | 535 | |
14d7ca5c PA |
536 | case BOOT_CF9_COND: |
537 | if (port_cf9_safe) { | |
538 | u8 cf9 = inb(0xcf9) & ~6; | |
539 | outb(cf9|2, 0xcf9); /* Request hard reset */ | |
540 | udelay(50); | |
541 | outb(cf9|6, 0xcf9); /* Actually do the reset */ | |
542 | udelay(50); | |
543 | } | |
4d022e35 MB |
544 | reboot_type = BOOT_KBD; |
545 | break; | |
546 | } | |
547 | } | |
548 | } | |
549 | ||
3c62c625 | 550 | void native_machine_shutdown(void) |
4d022e35 MB |
551 | { |
552 | /* Stop the cpus and apics */ | |
1da177e4 | 553 | #ifdef CONFIG_SMP |
144d102b | 554 | /* |
1b3a5d02 RH |
555 | * Stop all of the others. Also disable the local irq to |
556 | * not receive the per-cpu timer interrupt which may trigger | |
557 | * scheduler's load balance. | |
1da177e4 | 558 | */ |
55c844a4 | 559 | local_irq_disable(); |
76fac077 | 560 | stop_other_cpus(); |
4d022e35 | 561 | #endif |
1da177e4 LT |
562 | |
563 | lapic_shutdown(); | |
564 | ||
565 | #ifdef CONFIG_X86_IO_APIC | |
566 | disable_IO_APIC(); | |
567 | #endif | |
4d022e35 | 568 | |
c86c7fbc OH |
569 | #ifdef CONFIG_HPET_TIMER |
570 | hpet_disable(); | |
571 | #endif | |
dd2a1305 | 572 | |
4d022e35 | 573 | #ifdef CONFIG_X86_64 |
338bac52 | 574 | x86_platform.iommu_shutdown(); |
4d022e35 | 575 | #endif |
973efae2 JF |
576 | } |
577 | ||
d176720d EH |
578 | static void __machine_emergency_restart(int emergency) |
579 | { | |
580 | reboot_emergency = emergency; | |
581 | machine_ops.emergency_restart(); | |
582 | } | |
583 | ||
416e2d63 | 584 | static void native_machine_restart(char *__unused) |
dd2a1305 | 585 | { |
c767a54b | 586 | pr_notice("machine restart\n"); |
1da177e4 | 587 | |
4d022e35 MB |
588 | if (!reboot_force) |
589 | machine_shutdown(); | |
d176720d | 590 | __machine_emergency_restart(0); |
4a1421f8 EB |
591 | } |
592 | ||
416e2d63 | 593 | static void native_machine_halt(void) |
1da177e4 | 594 | { |
144d102b | 595 | /* Stop other cpus and apics */ |
d3ec5cae IV |
596 | machine_shutdown(); |
597 | ||
840c2baf JC |
598 | tboot_shutdown(TB_SHUTDOWN_HALT); |
599 | ||
d3ec5cae | 600 | stop_this_cpu(NULL); |
1da177e4 LT |
601 | } |
602 | ||
416e2d63 | 603 | static void native_machine_power_off(void) |
1da177e4 | 604 | { |
6e3fbee5 | 605 | if (pm_power_off) { |
4d022e35 MB |
606 | if (!reboot_force) |
607 | machine_shutdown(); | |
1da177e4 | 608 | pm_power_off(); |
6e3fbee5 | 609 | } |
144d102b | 610 | /* A fallback in case there is no PM info available */ |
840c2baf | 611 | tboot_shutdown(TB_SHUTDOWN_HALT); |
1da177e4 LT |
612 | } |
613 | ||
07f3331c | 614 | struct machine_ops machine_ops = { |
416e2d63 JB |
615 | .power_off = native_machine_power_off, |
616 | .shutdown = native_machine_shutdown, | |
617 | .emergency_restart = native_machine_emergency_restart, | |
618 | .restart = native_machine_restart, | |
ed23dc6f GC |
619 | .halt = native_machine_halt, |
620 | #ifdef CONFIG_KEXEC | |
621 | .crash_shutdown = native_machine_crash_shutdown, | |
622 | #endif | |
07f3331c | 623 | }; |
416e2d63 JB |
624 | |
625 | void machine_power_off(void) | |
626 | { | |
627 | machine_ops.power_off(); | |
628 | } | |
629 | ||
630 | void machine_shutdown(void) | |
631 | { | |
632 | machine_ops.shutdown(); | |
633 | } | |
634 | ||
635 | void machine_emergency_restart(void) | |
636 | { | |
d176720d | 637 | __machine_emergency_restart(1); |
416e2d63 JB |
638 | } |
639 | ||
640 | void machine_restart(char *cmd) | |
641 | { | |
642 | machine_ops.restart(cmd); | |
643 | } | |
644 | ||
645 | void machine_halt(void) | |
646 | { | |
647 | machine_ops.halt(); | |
648 | } | |
649 | ||
ed23dc6f GC |
650 | #ifdef CONFIG_KEXEC |
651 | void machine_crash_shutdown(struct pt_regs *regs) | |
652 | { | |
653 | machine_ops.crash_shutdown(regs); | |
654 | } | |
655 | #endif | |
2ddded21 EH |
656 | |
657 | ||
bb8dd270 | 658 | #if defined(CONFIG_SMP) |
2ddded21 EH |
659 | |
660 | /* This keeps a track of which one is crashing cpu. */ | |
661 | static int crashing_cpu; | |
662 | static nmi_shootdown_cb shootdown_callback; | |
663 | ||
664 | static atomic_t waiting_for_crash_ipi; | |
665 | ||
9c48f1c6 | 666 | static int crash_nmi_callback(unsigned int val, struct pt_regs *regs) |
2ddded21 EH |
667 | { |
668 | int cpu; | |
669 | ||
2ddded21 EH |
670 | cpu = raw_smp_processor_id(); |
671 | ||
144d102b ML |
672 | /* |
673 | * Don't do anything if this handler is invoked on crashing cpu. | |
2ddded21 EH |
674 | * Otherwise, system will completely hang. Crashing cpu can get |
675 | * an NMI if system was initially booted with nmi_watchdog parameter. | |
676 | */ | |
677 | if (cpu == crashing_cpu) | |
9c48f1c6 | 678 | return NMI_HANDLED; |
2ddded21 EH |
679 | local_irq_disable(); |
680 | ||
9c48f1c6 | 681 | shootdown_callback(cpu, regs); |
2ddded21 EH |
682 | |
683 | atomic_dec(&waiting_for_crash_ipi); | |
684 | /* Assume hlt works */ | |
685 | halt(); | |
686 | for (;;) | |
687 | cpu_relax(); | |
688 | ||
9c48f1c6 | 689 | return NMI_HANDLED; |
2ddded21 EH |
690 | } |
691 | ||
692 | static void smp_send_nmi_allbutself(void) | |
693 | { | |
dac5f412 | 694 | apic->send_IPI_allbutself(NMI_VECTOR); |
2ddded21 EH |
695 | } |
696 | ||
144d102b ML |
697 | /* |
698 | * Halt all other CPUs, calling the specified function on each of them | |
bb8dd270 EH |
699 | * |
700 | * This function can be used to halt all other CPUs on crash | |
701 | * or emergency reboot time. The function passed as parameter | |
702 | * will be called inside a NMI handler on all CPUs. | |
703 | */ | |
2ddded21 EH |
704 | void nmi_shootdown_cpus(nmi_shootdown_cb callback) |
705 | { | |
706 | unsigned long msecs; | |
c415b3dc | 707 | local_irq_disable(); |
2ddded21 | 708 | |
144d102b | 709 | /* Make a note of crashing cpu. Will be used in NMI callback. */ |
2ddded21 EH |
710 | crashing_cpu = safe_smp_processor_id(); |
711 | ||
712 | shootdown_callback = callback; | |
713 | ||
714 | atomic_set(&waiting_for_crash_ipi, num_online_cpus() - 1); | |
715 | /* Would it be better to replace the trap vector here? */ | |
9c48f1c6 DZ |
716 | if (register_nmi_handler(NMI_LOCAL, crash_nmi_callback, |
717 | NMI_FLAG_FIRST, "crash")) | |
144d102b ML |
718 | return; /* Return what? */ |
719 | /* | |
720 | * Ensure the new callback function is set before sending | |
2ddded21 EH |
721 | * out the NMI |
722 | */ | |
723 | wmb(); | |
724 | ||
725 | smp_send_nmi_allbutself(); | |
726 | ||
727 | msecs = 1000; /* Wait at most a second for the other cpus to stop */ | |
728 | while ((atomic_read(&waiting_for_crash_ipi) > 0) && msecs) { | |
729 | mdelay(1); | |
730 | msecs--; | |
731 | } | |
732 | ||
733 | /* Leave the nmi callback set */ | |
734 | } | |
bb8dd270 EH |
735 | #else /* !CONFIG_SMP */ |
736 | void nmi_shootdown_cpus(nmi_shootdown_cb callback) | |
737 | { | |
738 | /* No other CPUs to shoot down */ | |
739 | } | |
2ddded21 | 740 | #endif |