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> |
1da177e4 | 25 | |
4d022e35 | 26 | #ifdef CONFIG_X86_32 |
4d022e35 MB |
27 | # include <linux/ctype.h> |
28 | # include <linux/mc146818rtc.h> | |
5a8c9aeb | 29 | # include <asm/realmode.h> |
4d022e35 | 30 | #else |
338bac52 | 31 | # include <asm/x86_init.h> |
4d022e35 MB |
32 | #endif |
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 = {}; |
1da177e4 | 41 | static int reboot_mode; |
660e34ce | 42 | enum reboot_type reboot_type = BOOT_ACPI; |
4d022e35 | 43 | int reboot_force; |
1da177e4 | 44 | |
144d102b ML |
45 | /* |
46 | * This variable is used privately to keep track of whether or not | |
5955633e ML |
47 | * reboot_type is still set to its default value (i.e., reboot= hasn't |
48 | * been set on the command line). This is needed so that we can | |
49 | * suppress DMI scanning for reboot quirks. Without it, it's | |
50 | * impossible to override a faulty reboot quirk without recompiling. | |
51 | */ | |
52 | static int reboot_default = 1; | |
53 | ||
4d022e35 | 54 | #if defined(CONFIG_X86_32) && defined(CONFIG_SMP) |
1da177e4 | 55 | static int reboot_cpu = -1; |
1da177e4 | 56 | #endif |
4d022e35 | 57 | |
144d102b ML |
58 | /* |
59 | * This is set if we need to go through the 'emergency' path. | |
d176720d EH |
60 | * When machine_emergency_restart() is called, we may be on |
61 | * an inconsistent state and won't be able to do a clean cleanup | |
62 | */ | |
63 | static int reboot_emergency; | |
64 | ||
14d7ca5c PA |
65 | /* This is set by the PCI code if either type 1 or type 2 PCI is detected */ |
66 | bool port_cf9_safe = false; | |
67 | ||
144d102b ML |
68 | /* |
69 | * reboot=b[ios] | s[mp] | t[riple] | k[bd] | e[fi] [, [w]arm | [c]old] | p[ci] | |
70 | * warm Don't set the cold reboot flag | |
71 | * cold Set the cold reboot flag | |
72 | * bios Reboot by jumping through the BIOS (only for X86_32) | |
73 | * smp Reboot by executing reset on BSP or other CPU (only for X86_32) | |
74 | * triple Force a triple fault (init) | |
75 | * kbd Use the keyboard controller. cold reset (default) | |
76 | * acpi Use the RESET_REG in the FADT | |
77 | * efi Use efi reset_system runtime service | |
78 | * pci Use the so-called "PCI reset register", CF9 | |
79 | * force Avoid anything that could hang. | |
4d022e35 | 80 | */ |
1da177e4 LT |
81 | static int __init reboot_setup(char *str) |
82 | { | |
4d022e35 | 83 | for (;;) { |
144d102b ML |
84 | /* |
85 | * Having anything passed on the command line via | |
5955633e ML |
86 | * reboot= will cause us to disable DMI checking |
87 | * below. | |
88 | */ | |
89 | reboot_default = 0; | |
90 | ||
1da177e4 | 91 | switch (*str) { |
4d022e35 | 92 | case 'w': |
1da177e4 LT |
93 | reboot_mode = 0x1234; |
94 | break; | |
4d022e35 MB |
95 | |
96 | case 'c': | |
97 | reboot_mode = 0; | |
1da177e4 | 98 | break; |
4d022e35 MB |
99 | |
100 | #ifdef CONFIG_X86_32 | |
1da177e4 | 101 | #ifdef CONFIG_SMP |
4d022e35 | 102 | case 's': |
6f673d83 | 103 | if (isdigit(*(str+1))) { |
1da177e4 | 104 | reboot_cpu = (int) (*(str+1) - '0'); |
6f673d83 | 105 | if (isdigit(*(str+2))) |
1da177e4 LT |
106 | reboot_cpu = reboot_cpu*10 + (int)(*(str+2) - '0'); |
107 | } | |
144d102b ML |
108 | /* |
109 | * We will leave sorting out the final value | |
110 | * when we are ready to reboot, since we might not | |
111 | * have detected BSP APIC ID or smp_num_cpu | |
112 | */ | |
1da177e4 | 113 | break; |
4d022e35 MB |
114 | #endif /* CONFIG_SMP */ |
115 | ||
116 | case 'b': | |
1da177e4 | 117 | #endif |
4d022e35 MB |
118 | case 'a': |
119 | case 'k': | |
120 | case 't': | |
121 | case 'e': | |
14d7ca5c | 122 | case 'p': |
4d022e35 MB |
123 | reboot_type = *str; |
124 | break; | |
125 | ||
126 | case 'f': | |
127 | reboot_force = 1; | |
128 | break; | |
1da177e4 | 129 | } |
4d022e35 MB |
130 | |
131 | str = strchr(str, ','); | |
132 | if (str) | |
1da177e4 LT |
133 | str++; |
134 | else | |
135 | break; | |
136 | } | |
137 | return 1; | |
138 | } | |
139 | ||
140 | __setup("reboot=", reboot_setup); | |
141 | ||
4d022e35 MB |
142 | |
143 | #ifdef CONFIG_X86_32 | |
1da177e4 LT |
144 | /* |
145 | * Reboot options and system auto-detection code provided by | |
146 | * Dell Inc. so their systems "just work". :-) | |
147 | */ | |
148 | ||
149 | /* | |
1ef03890 | 150 | * Some machines require the "reboot=b" or "reboot=k" commandline options, |
4d022e35 | 151 | * this quirk makes that automatic. |
1da177e4 | 152 | */ |
1855256c | 153 | static int __init set_bios_reboot(const struct dmi_system_id *d) |
1da177e4 | 154 | { |
4d022e35 MB |
155 | if (reboot_type != BOOT_BIOS) { |
156 | reboot_type = BOOT_BIOS; | |
c767a54b JP |
157 | pr_info("%s series board detected. Selecting %s-method for reboots.\n", |
158 | "BIOS", d->ident); | |
1da177e4 LT |
159 | } |
160 | return 0; | |
161 | } | |
162 | ||
57b16594 ML |
163 | void machine_real_restart(unsigned int type) |
164 | { | |
731a7378 LT |
165 | void (*restart_lowmem)(unsigned int) = (void (*)(unsigned int)) |
166 | real_mode_header->machine_real_restart_asm; | |
57b16594 ML |
167 | |
168 | local_irq_disable(); | |
169 | ||
144d102b ML |
170 | /* |
171 | * Write zero to CMOS register number 0x0f, which the BIOS POST | |
172 | * routine will recognize as telling it to do a proper reboot. (Well | |
173 | * that's what this book in front of me says -- it may only apply to | |
174 | * the Phoenix BIOS though, it's not clear). At the same time, | |
175 | * disable NMIs by setting the top bit in the CMOS address register, | |
176 | * as we're about to do peculiar things to the CPU. I'm not sure if | |
177 | * `outb_p' is needed instead of just `outb'. Use it to be on the | |
178 | * safe side. (Yes, CMOS_WRITE does outb_p's. - Paul G.) | |
57b16594 ML |
179 | */ |
180 | spin_lock(&rtc_lock); | |
181 | CMOS_WRITE(0x00, 0x8f); | |
182 | spin_unlock(&rtc_lock); | |
183 | ||
184 | /* | |
185 | * Switch back to the initial page table. | |
186 | */ | |
187 | load_cr3(initial_page_table); | |
188 | ||
144d102b ML |
189 | /* |
190 | * Write 0x1234 to absolute memory location 0x472. The BIOS reads | |
191 | * this on booting to tell it to "Bypass memory test (also warm | |
192 | * boot)". This seems like a fairly standard thing that gets set by | |
193 | * REBOOT.COM programs, and the previous reset routine did this | |
194 | * too. */ | |
57b16594 ML |
195 | *((unsigned short *)0x472) = reboot_mode; |
196 | ||
57b16594 ML |
197 | /* Jump to the identity-mapped low memory code */ |
198 | restart_lowmem(type); | |
199 | } | |
200 | #ifdef CONFIG_APM_MODULE | |
201 | EXPORT_SYMBOL(machine_real_restart); | |
202 | #endif | |
203 | ||
204 | #endif /* CONFIG_X86_32 */ | |
205 | ||
206 | /* | |
207 | * Some Apple MacBook and MacBookPro's needs reboot=p to be able to reboot | |
208 | */ | |
209 | static int __init set_pci_reboot(const struct dmi_system_id *d) | |
210 | { | |
211 | if (reboot_type != BOOT_CF9) { | |
212 | reboot_type = BOOT_CF9; | |
c767a54b JP |
213 | pr_info("%s series board detected. Selecting %s-method for reboots.\n", |
214 | "PCI", d->ident); | |
57b16594 ML |
215 | } |
216 | return 0; | |
217 | } | |
218 | ||
1ef03890 PC |
219 | static int __init set_kbd_reboot(const struct dmi_system_id *d) |
220 | { | |
221 | if (reboot_type != BOOT_KBD) { | |
222 | reboot_type = BOOT_KBD; | |
c767a54b JP |
223 | pr_info("%s series board detected. Selecting %s-method for reboot.\n", |
224 | "KBD", d->ident); | |
1ef03890 PC |
225 | } |
226 | return 0; | |
227 | } | |
228 | ||
144d102b ML |
229 | /* |
230 | * This is a single dmi_table handling all reboot quirks. Note that | |
57b16594 ML |
231 | * REBOOT_BIOS is only available for 32bit |
232 | */ | |
1da177e4 | 233 | static struct dmi_system_id __initdata reboot_dmi_table[] = { |
57b16594 | 234 | #ifdef CONFIG_X86_32 |
b9e82af8 TG |
235 | { /* Handle problems with rebooting on Dell E520's */ |
236 | .callback = set_bios_reboot, | |
237 | .ident = "Dell E520", | |
238 | .matches = { | |
239 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
240 | DMI_MATCH(DMI_PRODUCT_NAME, "Dell DM061"), | |
241 | }, | |
242 | }, | |
1da177e4 | 243 | { /* Handle problems with rebooting on Dell 1300's */ |
dd2a1305 | 244 | .callback = set_bios_reboot, |
1da177e4 LT |
245 | .ident = "Dell PowerEdge 1300", |
246 | .matches = { | |
247 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"), | |
248 | DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge 1300/"), | |
249 | }, | |
250 | }, | |
251 | { /* Handle problems with rebooting on Dell 300's */ | |
252 | .callback = set_bios_reboot, | |
253 | .ident = "Dell PowerEdge 300", | |
254 | .matches = { | |
255 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"), | |
256 | DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge 300/"), | |
257 | }, | |
258 | }, | |
144d102b | 259 | { /* Handle problems with rebooting on Dell Optiplex 745's SFF */ |
df2edcf3 JJ |
260 | .callback = set_bios_reboot, |
261 | .ident = "Dell OptiPlex 745", | |
262 | .matches = { | |
263 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
264 | DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 745"), | |
df2edcf3 JJ |
265 | }, |
266 | }, | |
144d102b | 267 | { /* Handle problems with rebooting on Dell Optiplex 745's DFF */ |
fc115bf1 CK |
268 | .callback = set_bios_reboot, |
269 | .ident = "Dell OptiPlex 745", | |
270 | .matches = { | |
271 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
272 | DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 745"), | |
273 | DMI_MATCH(DMI_BOARD_NAME, "0MM599"), | |
274 | }, | |
275 | }, | |
144d102b | 276 | { /* Handle problems with rebooting on Dell Optiplex 745 with 0KW626 */ |
fc1c8925 HAA |
277 | .callback = set_bios_reboot, |
278 | .ident = "Dell OptiPlex 745", | |
279 | .matches = { | |
280 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
281 | DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 745"), | |
282 | DMI_MATCH(DMI_BOARD_NAME, "0KW626"), | |
283 | }, | |
284 | }, | |
144d102b | 285 | { /* Handle problems with rebooting on Dell Optiplex 330 with 0KP561 */ |
093bac15 SC |
286 | .callback = set_bios_reboot, |
287 | .ident = "Dell OptiPlex 330", | |
288 | .matches = { | |
289 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
290 | DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 330"), | |
291 | DMI_MATCH(DMI_BOARD_NAME, "0KP561"), | |
292 | }, | |
293 | }, | |
144d102b | 294 | { /* Handle problems with rebooting on Dell Optiplex 360 with 0T656F */ |
4a4aca64 JD |
295 | .callback = set_bios_reboot, |
296 | .ident = "Dell OptiPlex 360", | |
297 | .matches = { | |
298 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
299 | DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 360"), | |
300 | DMI_MATCH(DMI_BOARD_NAME, "0T656F"), | |
301 | }, | |
302 | }, | |
144d102b | 303 | { /* Handle problems with rebooting on Dell OptiPlex 760 with 0G919G */ |
35ea63d7 LO |
304 | .callback = set_bios_reboot, |
305 | .ident = "Dell OptiPlex 760", | |
306 | .matches = { | |
307 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
308 | DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 760"), | |
309 | DMI_MATCH(DMI_BOARD_NAME, "0G919G"), | |
310 | }, | |
311 | }, | |
1da177e4 LT |
312 | { /* Handle problems with rebooting on Dell 2400's */ |
313 | .callback = set_bios_reboot, | |
314 | .ident = "Dell PowerEdge 2400", | |
315 | .matches = { | |
316 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"), | |
317 | DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge 2400"), | |
318 | }, | |
319 | }, | |
fab3b58d IM |
320 | { /* Handle problems with rebooting on Dell T5400's */ |
321 | .callback = set_bios_reboot, | |
322 | .ident = "Dell Precision T5400", | |
323 | .matches = { | |
324 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
325 | DMI_MATCH(DMI_PRODUCT_NAME, "Precision WorkStation T5400"), | |
326 | }, | |
327 | }, | |
890ffedc TB |
328 | { /* Handle problems with rebooting on Dell T7400's */ |
329 | .callback = set_bios_reboot, | |
330 | .ident = "Dell Precision T7400", | |
331 | .matches = { | |
332 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
333 | DMI_MATCH(DMI_PRODUCT_NAME, "Precision WorkStation T7400"), | |
334 | }, | |
335 | }, | |
766c3f94 | 336 | { /* Handle problems with rebooting on HP laptops */ |
d91b14c4 | 337 | .callback = set_bios_reboot, |
766c3f94 | 338 | .ident = "HP Compaq Laptop", |
d91b14c4 TV |
339 | .matches = { |
340 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
766c3f94 | 341 | DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq"), |
d91b14c4 TV |
342 | }, |
343 | }, | |
dd4124a8 LO |
344 | { /* Handle problems with rebooting on Dell XPS710 */ |
345 | .callback = set_bios_reboot, | |
346 | .ident = "Dell XPS710", | |
347 | .matches = { | |
348 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
349 | DMI_MATCH(DMI_PRODUCT_NAME, "Dell XPS710"), | |
350 | }, | |
351 | }, | |
c5da9a2b AC |
352 | { /* Handle problems with rebooting on Dell DXP061 */ |
353 | .callback = set_bios_reboot, | |
354 | .ident = "Dell DXP061", | |
355 | .matches = { | |
356 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
357 | DMI_MATCH(DMI_PRODUCT_NAME, "Dell DXP061"), | |
358 | }, | |
359 | }, | |
88dff493 ZR |
360 | { /* Handle problems with rebooting on Sony VGN-Z540N */ |
361 | .callback = set_bios_reboot, | |
362 | .ident = "Sony VGN-Z540N", | |
363 | .matches = { | |
364 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
365 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-Z540N"), | |
366 | }, | |
367 | }, | |
77f32dfd DT |
368 | { /* Handle problems with rebooting on CompuLab SBC-FITPC2 */ |
369 | .callback = set_bios_reboot, | |
370 | .ident = "CompuLab SBC-FITPC2", | |
371 | .matches = { | |
372 | DMI_MATCH(DMI_SYS_VENDOR, "CompuLab"), | |
373 | DMI_MATCH(DMI_PRODUCT_NAME, "SBC-FITPC2"), | |
374 | }, | |
375 | }, | |
144d102b | 376 | { /* Handle problems with rebooting on ASUS P4S800 */ |
4832ddda LO |
377 | .callback = set_bios_reboot, |
378 | .ident = "ASUS P4S800", | |
379 | .matches = { | |
380 | DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), | |
381 | DMI_MATCH(DMI_BOARD_NAME, "P4S800"), | |
382 | }, | |
383 | }, | |
57b16594 ML |
384 | #endif /* CONFIG_X86_32 */ |
385 | ||
144d102b | 386 | { /* Handle reboot issue on Acer Aspire one */ |
1ef03890 | 387 | .callback = set_kbd_reboot, |
b49c78d4 PC |
388 | .ident = "Acer Aspire One A110", |
389 | .matches = { | |
390 | DMI_MATCH(DMI_SYS_VENDOR, "Acer"), | |
391 | DMI_MATCH(DMI_PRODUCT_NAME, "AOA110"), | |
392 | }, | |
393 | }, | |
3e03bbea | 394 | { /* Handle problems with rebooting on Apple MacBook5 */ |
6c6c51e4 | 395 | .callback = set_pci_reboot, |
3e03bbea | 396 | .ident = "Apple MacBook5", |
6c6c51e4 PM |
397 | .matches = { |
398 | DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), | |
3e03bbea | 399 | DMI_MATCH(DMI_PRODUCT_NAME, "MacBook5"), |
6c6c51e4 PM |
400 | }, |
401 | }, | |
3e03bbea | 402 | { /* Handle problems with rebooting on Apple MacBookPro5 */ |
498cdbfb | 403 | .callback = set_pci_reboot, |
3e03bbea | 404 | .ident = "Apple MacBookPro5", |
498cdbfb OÇ |
405 | .matches = { |
406 | DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), | |
3e03bbea | 407 | DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro5"), |
498cdbfb OÇ |
408 | }, |
409 | }, | |
05154752 GH |
410 | { /* Handle problems with rebooting on Apple Macmini3,1 */ |
411 | .callback = set_pci_reboot, | |
412 | .ident = "Apple Macmini3,1", | |
413 | .matches = { | |
414 | DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), | |
415 | DMI_MATCH(DMI_PRODUCT_NAME, "Macmini3,1"), | |
416 | }, | |
417 | }, | |
0a832320 JM |
418 | { /* Handle problems with rebooting on the iMac9,1. */ |
419 | .callback = set_pci_reboot, | |
420 | .ident = "Apple iMac9,1", | |
421 | .matches = { | |
422 | DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), | |
423 | DMI_MATCH(DMI_PRODUCT_NAME, "iMac9,1"), | |
424 | }, | |
425 | }, | |
3628c3f5 MR |
426 | { /* Handle problems with rebooting on the Latitude E6320. */ |
427 | .callback = set_pci_reboot, | |
428 | .ident = "Dell Latitude E6320", | |
429 | .matches = { | |
430 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
431 | DMI_MATCH(DMI_PRODUCT_NAME, "Latitude E6320"), | |
432 | }, | |
433 | }, | |
b7798d28 DB |
434 | { /* Handle problems with rebooting on the Latitude E5420. */ |
435 | .callback = set_pci_reboot, | |
436 | .ident = "Dell Latitude E5420", | |
437 | .matches = { | |
438 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
439 | DMI_MATCH(DMI_PRODUCT_NAME, "Latitude E5420"), | |
440 | }, | |
441 | }, | |
a536877e PA |
442 | { /* Handle problems with rebooting on the Latitude E6420. */ |
443 | .callback = set_pci_reboot, | |
444 | .ident = "Dell Latitude E6420", | |
445 | .matches = { | |
446 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
447 | DMI_MATCH(DMI_PRODUCT_NAME, "Latitude E6420"), | |
448 | }, | |
449 | }, | |
6be30bb7 RW |
450 | { /* Handle problems with rebooting on the OptiPlex 990. */ |
451 | .callback = set_pci_reboot, | |
452 | .ident = "Dell OptiPlex 990", | |
453 | .matches = { | |
454 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
455 | DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 990"), | |
456 | }, | |
457 | }, | |
76eb9a30 ZR |
458 | { /* Handle problems with rebooting on the Precision M6600. */ |
459 | .callback = set_pci_reboot, | |
460 | .ident = "Dell OptiPlex 990", | |
461 | .matches = { | |
462 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
463 | DMI_MATCH(DMI_PRODUCT_NAME, "Precision M6600"), | |
464 | }, | |
465 | }, | |
6c6c51e4 PM |
466 | { } |
467 | }; | |
468 | ||
57b16594 | 469 | static int __init reboot_init(void) |
6c6c51e4 | 470 | { |
144d102b ML |
471 | /* |
472 | * Only do the DMI check if reboot_type hasn't been overridden | |
5955633e ML |
473 | * on the command line |
474 | */ | |
144d102b | 475 | if (reboot_default) |
57b16594 | 476 | dmi_check_system(reboot_dmi_table); |
6c6c51e4 PM |
477 | return 0; |
478 | } | |
57b16594 | 479 | core_initcall(reboot_init); |
6c6c51e4 | 480 | |
4d022e35 MB |
481 | static inline void kb_wait(void) |
482 | { | |
483 | int i; | |
484 | ||
c84d6af8 AC |
485 | for (i = 0; i < 0x10000; i++) { |
486 | if ((inb(0x64) & 0x02) == 0) | |
4d022e35 | 487 | break; |
c84d6af8 AC |
488 | udelay(2); |
489 | } | |
4d022e35 MB |
490 | } |
491 | ||
9c48f1c6 | 492 | static void vmxoff_nmi(int cpu, struct pt_regs *regs) |
d176720d EH |
493 | { |
494 | cpu_emergency_vmxoff(); | |
495 | } | |
496 | ||
144d102b | 497 | /* Use NMIs as IPIs to tell all CPUs to disable virtualization */ |
d176720d EH |
498 | static void emergency_vmx_disable_all(void) |
499 | { | |
500 | /* Just make sure we won't change CPUs while doing this */ | |
501 | local_irq_disable(); | |
502 | ||
144d102b ML |
503 | /* |
504 | * We need to disable VMX on all CPUs before rebooting, otherwise | |
d176720d EH |
505 | * we risk hanging up the machine, because the CPU ignore INIT |
506 | * signals when VMX is enabled. | |
507 | * | |
508 | * We can't take any locks and we may be on an inconsistent | |
509 | * state, so we use NMIs as IPIs to tell the other CPUs to disable | |
510 | * VMX and halt. | |
511 | * | |
512 | * For safety, we will avoid running the nmi_shootdown_cpus() | |
513 | * stuff unnecessarily, but we don't have a way to check | |
514 | * if other CPUs have VMX enabled. So we will call it only if the | |
515 | * CPU we are running on has VMX enabled. | |
516 | * | |
517 | * We will miss cases where VMX is not enabled on all CPUs. This | |
518 | * shouldn't do much harm because KVM always enable VMX on all | |
519 | * CPUs anyway. But we can miss it on the small window where KVM | |
520 | * is still enabling VMX. | |
521 | */ | |
522 | if (cpu_has_vmx() && cpu_vmx_enabled()) { | |
144d102b | 523 | /* Disable VMX on this CPU. */ |
d176720d EH |
524 | cpu_vmxoff(); |
525 | ||
526 | /* Halt and disable VMX on the other CPUs */ | |
527 | nmi_shootdown_cpus(vmxoff_nmi); | |
528 | ||
529 | } | |
530 | } | |
531 | ||
532 | ||
7432d149 IM |
533 | void __attribute__((weak)) mach_reboot_fixups(void) |
534 | { | |
535 | } | |
536 | ||
660e34ce MG |
537 | /* |
538 | * Windows compatible x86 hardware expects the following on reboot: | |
539 | * | |
540 | * 1) If the FADT has the ACPI reboot register flag set, try it | |
541 | * 2) If still alive, write to the keyboard controller | |
542 | * 3) If still alive, write to the ACPI reboot register again | |
543 | * 4) If still alive, write to the keyboard controller again | |
544 | * | |
545 | * If the machine is still alive at this stage, it gives up. We default to | |
546 | * following the same pattern, except that if we're still alive after (4) we'll | |
547 | * try to force a triple fault and then cycle between hitting the keyboard | |
548 | * controller and doing that | |
549 | */ | |
416e2d63 | 550 | static void native_machine_emergency_restart(void) |
1da177e4 | 551 | { |
4d022e35 | 552 | int i; |
660e34ce MG |
553 | int attempt = 0; |
554 | int orig_reboot_type = reboot_type; | |
4d022e35 | 555 | |
d176720d EH |
556 | if (reboot_emergency) |
557 | emergency_vmx_disable_all(); | |
558 | ||
840c2baf JC |
559 | tboot_shutdown(TB_SHUTDOWN_REBOOT); |
560 | ||
4d022e35 MB |
561 | /* Tell the BIOS if we want cold or warm reboot */ |
562 | *((unsigned short *)__va(0x472)) = reboot_mode; | |
563 | ||
564 | for (;;) { | |
565 | /* Could also try the reset bit in the Hammer NB */ | |
566 | switch (reboot_type) { | |
567 | case BOOT_KBD: | |
144d102b | 568 | mach_reboot_fixups(); /* For board specific fixups */ |
7432d149 | 569 | |
4d022e35 MB |
570 | for (i = 0; i < 10; i++) { |
571 | kb_wait(); | |
572 | udelay(50); | |
144d102b | 573 | outb(0xfe, 0x64); /* Pulse reset low */ |
4d022e35 MB |
574 | udelay(50); |
575 | } | |
660e34ce MG |
576 | if (attempt == 0 && orig_reboot_type == BOOT_ACPI) { |
577 | attempt = 1; | |
578 | reboot_type = BOOT_ACPI; | |
579 | } else { | |
580 | reboot_type = BOOT_TRIPLE; | |
581 | } | |
582 | break; | |
4d022e35 MB |
583 | |
584 | case BOOT_TRIPLE: | |
ebdd561a | 585 | load_idt(&no_idt); |
4d022e35 MB |
586 | __asm__ __volatile__("int3"); |
587 | ||
588 | reboot_type = BOOT_KBD; | |
589 | break; | |
590 | ||
591 | #ifdef CONFIG_X86_32 | |
592 | case BOOT_BIOS: | |
3d35ac34 | 593 | machine_real_restart(MRR_BIOS); |
4d022e35 MB |
594 | |
595 | reboot_type = BOOT_KBD; | |
596 | break; | |
597 | #endif | |
598 | ||
599 | case BOOT_ACPI: | |
600 | acpi_reboot(); | |
601 | reboot_type = BOOT_KBD; | |
602 | break; | |
603 | ||
4d022e35 MB |
604 | case BOOT_EFI: |
605 | if (efi_enabled) | |
14d7ca5c PA |
606 | efi.reset_system(reboot_mode ? |
607 | EFI_RESET_WARM : | |
608 | EFI_RESET_COLD, | |
4d022e35 | 609 | EFI_SUCCESS, 0, NULL); |
b47b9288 | 610 | reboot_type = BOOT_KBD; |
14d7ca5c | 611 | break; |
4d022e35 | 612 | |
14d7ca5c PA |
613 | case BOOT_CF9: |
614 | port_cf9_safe = true; | |
144d102b | 615 | /* Fall through */ |
4d022e35 | 616 | |
14d7ca5c PA |
617 | case BOOT_CF9_COND: |
618 | if (port_cf9_safe) { | |
619 | u8 cf9 = inb(0xcf9) & ~6; | |
620 | outb(cf9|2, 0xcf9); /* Request hard reset */ | |
621 | udelay(50); | |
622 | outb(cf9|6, 0xcf9); /* Actually do the reset */ | |
623 | udelay(50); | |
624 | } | |
4d022e35 MB |
625 | reboot_type = BOOT_KBD; |
626 | break; | |
627 | } | |
628 | } | |
629 | } | |
630 | ||
3c62c625 | 631 | void native_machine_shutdown(void) |
4d022e35 MB |
632 | { |
633 | /* Stop the cpus and apics */ | |
1da177e4 | 634 | #ifdef CONFIG_SMP |
dd2a1305 EB |
635 | |
636 | /* The boot cpu is always logical cpu 0 */ | |
65c01184 | 637 | int reboot_cpu_id = 0; |
dd2a1305 | 638 | |
4d022e35 | 639 | #ifdef CONFIG_X86_32 |
dd2a1305 | 640 | /* See if there has been given a command line override */ |
9628937d | 641 | if ((reboot_cpu != -1) && (reboot_cpu < nr_cpu_ids) && |
0bc3cc03 | 642 | cpu_online(reboot_cpu)) |
dd2a1305 | 643 | reboot_cpu_id = reboot_cpu; |
4d022e35 | 644 | #endif |
1da177e4 | 645 | |
4d022e35 | 646 | /* Make certain the cpu I'm about to reboot on is online */ |
0bc3cc03 | 647 | if (!cpu_online(reboot_cpu_id)) |
dd2a1305 | 648 | reboot_cpu_id = smp_processor_id(); |
dd2a1305 EB |
649 | |
650 | /* Make certain I only run on the appropriate processor */ | |
9628937d | 651 | set_cpus_allowed_ptr(current, cpumask_of(reboot_cpu_id)); |
dd2a1305 | 652 | |
144d102b | 653 | /* |
55c844a4 FT |
654 | * O.K Now that I'm on the appropriate processor, stop all of the |
655 | * others. Also disable the local irq to not receive the per-cpu | |
656 | * timer interrupt which may trigger scheduler's load balance. | |
1da177e4 | 657 | */ |
55c844a4 | 658 | local_irq_disable(); |
76fac077 | 659 | stop_other_cpus(); |
4d022e35 | 660 | #endif |
1da177e4 LT |
661 | |
662 | lapic_shutdown(); | |
663 | ||
664 | #ifdef CONFIG_X86_IO_APIC | |
665 | disable_IO_APIC(); | |
666 | #endif | |
4d022e35 | 667 | |
c86c7fbc OH |
668 | #ifdef CONFIG_HPET_TIMER |
669 | hpet_disable(); | |
670 | #endif | |
dd2a1305 | 671 | |
4d022e35 | 672 | #ifdef CONFIG_X86_64 |
338bac52 | 673 | x86_platform.iommu_shutdown(); |
4d022e35 | 674 | #endif |
973efae2 JF |
675 | } |
676 | ||
d176720d EH |
677 | static void __machine_emergency_restart(int emergency) |
678 | { | |
679 | reboot_emergency = emergency; | |
680 | machine_ops.emergency_restart(); | |
681 | } | |
682 | ||
416e2d63 | 683 | static void native_machine_restart(char *__unused) |
dd2a1305 | 684 | { |
c767a54b | 685 | pr_notice("machine restart\n"); |
1da177e4 | 686 | |
4d022e35 MB |
687 | if (!reboot_force) |
688 | machine_shutdown(); | |
d176720d | 689 | __machine_emergency_restart(0); |
4a1421f8 EB |
690 | } |
691 | ||
416e2d63 | 692 | static void native_machine_halt(void) |
1da177e4 | 693 | { |
144d102b | 694 | /* Stop other cpus and apics */ |
d3ec5cae IV |
695 | machine_shutdown(); |
696 | ||
840c2baf JC |
697 | tboot_shutdown(TB_SHUTDOWN_HALT); |
698 | ||
d3ec5cae | 699 | stop_this_cpu(NULL); |
1da177e4 LT |
700 | } |
701 | ||
416e2d63 | 702 | static void native_machine_power_off(void) |
1da177e4 | 703 | { |
6e3fbee5 | 704 | if (pm_power_off) { |
4d022e35 MB |
705 | if (!reboot_force) |
706 | machine_shutdown(); | |
1da177e4 | 707 | pm_power_off(); |
6e3fbee5 | 708 | } |
144d102b | 709 | /* A fallback in case there is no PM info available */ |
840c2baf | 710 | tboot_shutdown(TB_SHUTDOWN_HALT); |
1da177e4 LT |
711 | } |
712 | ||
07f3331c | 713 | struct machine_ops machine_ops = { |
416e2d63 JB |
714 | .power_off = native_machine_power_off, |
715 | .shutdown = native_machine_shutdown, | |
716 | .emergency_restart = native_machine_emergency_restart, | |
717 | .restart = native_machine_restart, | |
ed23dc6f GC |
718 | .halt = native_machine_halt, |
719 | #ifdef CONFIG_KEXEC | |
720 | .crash_shutdown = native_machine_crash_shutdown, | |
721 | #endif | |
07f3331c | 722 | }; |
416e2d63 JB |
723 | |
724 | void machine_power_off(void) | |
725 | { | |
726 | machine_ops.power_off(); | |
727 | } | |
728 | ||
729 | void machine_shutdown(void) | |
730 | { | |
731 | machine_ops.shutdown(); | |
732 | } | |
733 | ||
734 | void machine_emergency_restart(void) | |
735 | { | |
d176720d | 736 | __machine_emergency_restart(1); |
416e2d63 JB |
737 | } |
738 | ||
739 | void machine_restart(char *cmd) | |
740 | { | |
741 | machine_ops.restart(cmd); | |
742 | } | |
743 | ||
744 | void machine_halt(void) | |
745 | { | |
746 | machine_ops.halt(); | |
747 | } | |
748 | ||
ed23dc6f GC |
749 | #ifdef CONFIG_KEXEC |
750 | void machine_crash_shutdown(struct pt_regs *regs) | |
751 | { | |
752 | machine_ops.crash_shutdown(regs); | |
753 | } | |
754 | #endif | |
2ddded21 EH |
755 | |
756 | ||
bb8dd270 | 757 | #if defined(CONFIG_SMP) |
2ddded21 EH |
758 | |
759 | /* This keeps a track of which one is crashing cpu. */ | |
760 | static int crashing_cpu; | |
761 | static nmi_shootdown_cb shootdown_callback; | |
762 | ||
763 | static atomic_t waiting_for_crash_ipi; | |
764 | ||
9c48f1c6 | 765 | static int crash_nmi_callback(unsigned int val, struct pt_regs *regs) |
2ddded21 EH |
766 | { |
767 | int cpu; | |
768 | ||
2ddded21 EH |
769 | cpu = raw_smp_processor_id(); |
770 | ||
144d102b ML |
771 | /* |
772 | * Don't do anything if this handler is invoked on crashing cpu. | |
2ddded21 EH |
773 | * Otherwise, system will completely hang. Crashing cpu can get |
774 | * an NMI if system was initially booted with nmi_watchdog parameter. | |
775 | */ | |
776 | if (cpu == crashing_cpu) | |
9c48f1c6 | 777 | return NMI_HANDLED; |
2ddded21 EH |
778 | local_irq_disable(); |
779 | ||
9c48f1c6 | 780 | shootdown_callback(cpu, regs); |
2ddded21 EH |
781 | |
782 | atomic_dec(&waiting_for_crash_ipi); | |
783 | /* Assume hlt works */ | |
784 | halt(); | |
785 | for (;;) | |
786 | cpu_relax(); | |
787 | ||
9c48f1c6 | 788 | return NMI_HANDLED; |
2ddded21 EH |
789 | } |
790 | ||
791 | static void smp_send_nmi_allbutself(void) | |
792 | { | |
dac5f412 | 793 | apic->send_IPI_allbutself(NMI_VECTOR); |
2ddded21 EH |
794 | } |
795 | ||
144d102b ML |
796 | /* |
797 | * Halt all other CPUs, calling the specified function on each of them | |
bb8dd270 EH |
798 | * |
799 | * This function can be used to halt all other CPUs on crash | |
800 | * or emergency reboot time. The function passed as parameter | |
801 | * will be called inside a NMI handler on all CPUs. | |
802 | */ | |
2ddded21 EH |
803 | void nmi_shootdown_cpus(nmi_shootdown_cb callback) |
804 | { | |
805 | unsigned long msecs; | |
c415b3dc | 806 | local_irq_disable(); |
2ddded21 | 807 | |
144d102b | 808 | /* Make a note of crashing cpu. Will be used in NMI callback. */ |
2ddded21 EH |
809 | crashing_cpu = safe_smp_processor_id(); |
810 | ||
811 | shootdown_callback = callback; | |
812 | ||
813 | atomic_set(&waiting_for_crash_ipi, num_online_cpus() - 1); | |
814 | /* Would it be better to replace the trap vector here? */ | |
9c48f1c6 DZ |
815 | if (register_nmi_handler(NMI_LOCAL, crash_nmi_callback, |
816 | NMI_FLAG_FIRST, "crash")) | |
144d102b ML |
817 | return; /* Return what? */ |
818 | /* | |
819 | * Ensure the new callback function is set before sending | |
2ddded21 EH |
820 | * out the NMI |
821 | */ | |
822 | wmb(); | |
823 | ||
824 | smp_send_nmi_allbutself(); | |
825 | ||
826 | msecs = 1000; /* Wait at most a second for the other cpus to stop */ | |
827 | while ((atomic_read(&waiting_for_crash_ipi) > 0) && msecs) { | |
828 | mdelay(1); | |
829 | msecs--; | |
830 | } | |
831 | ||
832 | /* Leave the nmi callback set */ | |
833 | } | |
bb8dd270 EH |
834 | #else /* !CONFIG_SMP */ |
835 | void nmi_shootdown_cpus(nmi_shootdown_cb callback) | |
836 | { | |
837 | /* No other CPUs to shoot down */ | |
838 | } | |
2ddded21 | 839 | #endif |