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Commit | Line | Data |
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1da177e4 | 1 | #include <linux/module.h> |
cd6ed525 | 2 | #include <linux/reboot.h> |
4d022e35 MB |
3 | #include <linux/init.h> |
4 | #include <linux/pm.h> | |
5 | #include <linux/efi.h> | |
6c6c51e4 | 6 | #include <linux/dmi.h> |
d43c36dc | 7 | #include <linux/sched.h> |
69575d38 | 8 | #include <linux/tboot.h> |
ca444564 | 9 | #include <linux/delay.h> |
4d022e35 MB |
10 | #include <acpi/reboot.h> |
11 | #include <asm/io.h> | |
1da177e4 | 12 | #include <asm/apic.h> |
4d37e7e3 | 13 | #include <asm/desc.h> |
4d022e35 | 14 | #include <asm/hpet.h> |
68db065c | 15 | #include <asm/pgtable.h> |
4412620f | 16 | #include <asm/proto.h> |
973efae2 | 17 | #include <asm/reboot_fixups.h> |
07f3331c | 18 | #include <asm/reboot.h> |
82487711 | 19 | #include <asm/pci_x86.h> |
d176720d | 20 | #include <asm/virtext.h> |
96b89dc6 | 21 | #include <asm/cpu.h> |
c410b830 | 22 | #include <asm/nmi.h> |
1da177e4 | 23 | |
4d022e35 | 24 | #ifdef CONFIG_X86_32 |
4d022e35 MB |
25 | # include <linux/ctype.h> |
26 | # include <linux/mc146818rtc.h> | |
4d022e35 | 27 | #else |
338bac52 | 28 | # include <asm/x86_init.h> |
4d022e35 MB |
29 | #endif |
30 | ||
1da177e4 LT |
31 | /* |
32 | * Power off function, if any | |
33 | */ | |
34 | void (*pm_power_off)(void); | |
129f6946 | 35 | EXPORT_SYMBOL(pm_power_off); |
1da177e4 | 36 | |
ebdd561a | 37 | static const struct desc_ptr no_idt = {}; |
1da177e4 | 38 | static int reboot_mode; |
660e34ce | 39 | enum reboot_type reboot_type = BOOT_ACPI; |
4d022e35 | 40 | int reboot_force; |
1da177e4 | 41 | |
5955633e ML |
42 | /* This variable is used privately to keep track of whether or not |
43 | * reboot_type is still set to its default value (i.e., reboot= hasn't | |
44 | * been set on the command line). This is needed so that we can | |
45 | * suppress DMI scanning for reboot quirks. Without it, it's | |
46 | * impossible to override a faulty reboot quirk without recompiling. | |
47 | */ | |
48 | static int reboot_default = 1; | |
49 | ||
4d022e35 | 50 | #if defined(CONFIG_X86_32) && defined(CONFIG_SMP) |
1da177e4 | 51 | static int reboot_cpu = -1; |
1da177e4 | 52 | #endif |
4d022e35 | 53 | |
d176720d EH |
54 | /* This is set if we need to go through the 'emergency' path. |
55 | * When machine_emergency_restart() is called, we may be on | |
56 | * an inconsistent state and won't be able to do a clean cleanup | |
57 | */ | |
58 | static int reboot_emergency; | |
59 | ||
14d7ca5c PA |
60 | /* This is set by the PCI code if either type 1 or type 2 PCI is detected */ |
61 | bool port_cf9_safe = false; | |
62 | ||
63 | /* reboot=b[ios] | s[mp] | t[riple] | k[bd] | e[fi] [, [w]arm | [c]old] | p[ci] | |
4d022e35 MB |
64 | warm Don't set the cold reboot flag |
65 | cold Set the cold reboot flag | |
66 | bios Reboot by jumping through the BIOS (only for X86_32) | |
67 | smp Reboot by executing reset on BSP or other CPU (only for X86_32) | |
68 | triple Force a triple fault (init) | |
69 | kbd Use the keyboard controller. cold reset (default) | |
70 | acpi Use the RESET_REG in the FADT | |
71 | efi Use efi reset_system runtime service | |
14d7ca5c | 72 | pci Use the so-called "PCI reset register", CF9 |
4d022e35 MB |
73 | force Avoid anything that could hang. |
74 | */ | |
1da177e4 LT |
75 | static int __init reboot_setup(char *str) |
76 | { | |
4d022e35 | 77 | for (;;) { |
5955633e ML |
78 | /* Having anything passed on the command line via |
79 | * reboot= will cause us to disable DMI checking | |
80 | * below. | |
81 | */ | |
82 | reboot_default = 0; | |
83 | ||
1da177e4 | 84 | switch (*str) { |
4d022e35 | 85 | case 'w': |
1da177e4 LT |
86 | reboot_mode = 0x1234; |
87 | break; | |
4d022e35 MB |
88 | |
89 | case 'c': | |
90 | reboot_mode = 0; | |
1da177e4 | 91 | break; |
4d022e35 MB |
92 | |
93 | #ifdef CONFIG_X86_32 | |
1da177e4 | 94 | #ifdef CONFIG_SMP |
4d022e35 | 95 | case 's': |
6f673d83 | 96 | if (isdigit(*(str+1))) { |
1da177e4 | 97 | reboot_cpu = (int) (*(str+1) - '0'); |
6f673d83 | 98 | if (isdigit(*(str+2))) |
1da177e4 LT |
99 | reboot_cpu = reboot_cpu*10 + (int)(*(str+2) - '0'); |
100 | } | |
4d022e35 MB |
101 | /* we will leave sorting out the final value |
102 | when we are ready to reboot, since we might not | |
f6e9456c | 103 | have detected BSP APIC ID or smp_num_cpu */ |
1da177e4 | 104 | break; |
4d022e35 MB |
105 | #endif /* CONFIG_SMP */ |
106 | ||
107 | case 'b': | |
1da177e4 | 108 | #endif |
4d022e35 MB |
109 | case 'a': |
110 | case 'k': | |
111 | case 't': | |
112 | case 'e': | |
14d7ca5c | 113 | case 'p': |
4d022e35 MB |
114 | reboot_type = *str; |
115 | break; | |
116 | ||
117 | case 'f': | |
118 | reboot_force = 1; | |
119 | break; | |
1da177e4 | 120 | } |
4d022e35 MB |
121 | |
122 | str = strchr(str, ','); | |
123 | if (str) | |
1da177e4 LT |
124 | str++; |
125 | else | |
126 | break; | |
127 | } | |
128 | return 1; | |
129 | } | |
130 | ||
131 | __setup("reboot=", reboot_setup); | |
132 | ||
4d022e35 MB |
133 | |
134 | #ifdef CONFIG_X86_32 | |
1da177e4 LT |
135 | /* |
136 | * Reboot options and system auto-detection code provided by | |
137 | * Dell Inc. so their systems "just work". :-) | |
138 | */ | |
139 | ||
140 | /* | |
1ef03890 | 141 | * Some machines require the "reboot=b" or "reboot=k" commandline options, |
4d022e35 | 142 | * this quirk makes that automatic. |
1da177e4 | 143 | */ |
1855256c | 144 | static int __init set_bios_reboot(const struct dmi_system_id *d) |
1da177e4 | 145 | { |
4d022e35 MB |
146 | if (reboot_type != BOOT_BIOS) { |
147 | reboot_type = BOOT_BIOS; | |
1da177e4 LT |
148 | printk(KERN_INFO "%s series board detected. Selecting BIOS-method for reboots.\n", d->ident); |
149 | } | |
150 | return 0; | |
151 | } | |
152 | ||
1ef03890 PC |
153 | static int __init set_kbd_reboot(const struct dmi_system_id *d) |
154 | { | |
155 | if (reboot_type != BOOT_KBD) { | |
156 | reboot_type = BOOT_KBD; | |
157 | printk(KERN_INFO "%s series board detected. Selecting KBD-method for reboot.\n", d->ident); | |
158 | } | |
159 | return 0; | |
160 | } | |
161 | ||
1da177e4 | 162 | static struct dmi_system_id __initdata reboot_dmi_table[] = { |
b9e82af8 TG |
163 | { /* Handle problems with rebooting on Dell E520's */ |
164 | .callback = set_bios_reboot, | |
165 | .ident = "Dell E520", | |
166 | .matches = { | |
167 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
168 | DMI_MATCH(DMI_PRODUCT_NAME, "Dell DM061"), | |
169 | }, | |
170 | }, | |
1da177e4 | 171 | { /* Handle problems with rebooting on Dell 1300's */ |
dd2a1305 | 172 | .callback = set_bios_reboot, |
1da177e4 LT |
173 | .ident = "Dell PowerEdge 1300", |
174 | .matches = { | |
175 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"), | |
176 | DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge 1300/"), | |
177 | }, | |
178 | }, | |
179 | { /* Handle problems with rebooting on Dell 300's */ | |
180 | .callback = set_bios_reboot, | |
181 | .ident = "Dell PowerEdge 300", | |
182 | .matches = { | |
183 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"), | |
184 | DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge 300/"), | |
185 | }, | |
186 | }, | |
df2edcf3 JJ |
187 | { /* Handle problems with rebooting on Dell Optiplex 745's SFF*/ |
188 | .callback = set_bios_reboot, | |
189 | .ident = "Dell OptiPlex 745", | |
190 | .matches = { | |
191 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
192 | DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 745"), | |
df2edcf3 JJ |
193 | }, |
194 | }, | |
fc115bf1 CK |
195 | { /* Handle problems with rebooting on Dell Optiplex 745's DFF*/ |
196 | .callback = set_bios_reboot, | |
197 | .ident = "Dell OptiPlex 745", | |
198 | .matches = { | |
199 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
200 | DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 745"), | |
201 | DMI_MATCH(DMI_BOARD_NAME, "0MM599"), | |
202 | }, | |
203 | }, | |
fc1c8925 HAA |
204 | { /* Handle problems with rebooting on Dell Optiplex 745 with 0KW626 */ |
205 | .callback = set_bios_reboot, | |
206 | .ident = "Dell OptiPlex 745", | |
207 | .matches = { | |
208 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
209 | DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 745"), | |
210 | DMI_MATCH(DMI_BOARD_NAME, "0KW626"), | |
211 | }, | |
212 | }, | |
093bac15 SC |
213 | { /* Handle problems with rebooting on Dell Optiplex 330 with 0KP561 */ |
214 | .callback = set_bios_reboot, | |
215 | .ident = "Dell OptiPlex 330", | |
216 | .matches = { | |
217 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
218 | DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 330"), | |
219 | DMI_MATCH(DMI_BOARD_NAME, "0KP561"), | |
220 | }, | |
221 | }, | |
4a4aca64 JD |
222 | { /* Handle problems with rebooting on Dell Optiplex 360 with 0T656F */ |
223 | .callback = set_bios_reboot, | |
224 | .ident = "Dell OptiPlex 360", | |
225 | .matches = { | |
226 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
227 | DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 360"), | |
228 | DMI_MATCH(DMI_BOARD_NAME, "0T656F"), | |
229 | }, | |
230 | }, | |
35ea63d7 LO |
231 | { /* Handle problems with rebooting on Dell OptiPlex 760 with 0G919G*/ |
232 | .callback = set_bios_reboot, | |
233 | .ident = "Dell OptiPlex 760", | |
234 | .matches = { | |
235 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
236 | DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 760"), | |
237 | DMI_MATCH(DMI_BOARD_NAME, "0G919G"), | |
238 | }, | |
239 | }, | |
1da177e4 LT |
240 | { /* Handle problems with rebooting on Dell 2400's */ |
241 | .callback = set_bios_reboot, | |
242 | .ident = "Dell PowerEdge 2400", | |
243 | .matches = { | |
244 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"), | |
245 | DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge 2400"), | |
246 | }, | |
247 | }, | |
fab3b58d IM |
248 | { /* Handle problems with rebooting on Dell T5400's */ |
249 | .callback = set_bios_reboot, | |
250 | .ident = "Dell Precision T5400", | |
251 | .matches = { | |
252 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
253 | DMI_MATCH(DMI_PRODUCT_NAME, "Precision WorkStation T5400"), | |
254 | }, | |
255 | }, | |
890ffedc TB |
256 | { /* Handle problems with rebooting on Dell T7400's */ |
257 | .callback = set_bios_reboot, | |
258 | .ident = "Dell Precision T7400", | |
259 | .matches = { | |
260 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
261 | DMI_MATCH(DMI_PRODUCT_NAME, "Precision WorkStation T7400"), | |
262 | }, | |
263 | }, | |
766c3f94 | 264 | { /* Handle problems with rebooting on HP laptops */ |
d91b14c4 | 265 | .callback = set_bios_reboot, |
766c3f94 | 266 | .ident = "HP Compaq Laptop", |
d91b14c4 TV |
267 | .matches = { |
268 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
766c3f94 | 269 | DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq"), |
d91b14c4 TV |
270 | }, |
271 | }, | |
dd4124a8 LO |
272 | { /* Handle problems with rebooting on Dell XPS710 */ |
273 | .callback = set_bios_reboot, | |
274 | .ident = "Dell XPS710", | |
275 | .matches = { | |
276 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
277 | DMI_MATCH(DMI_PRODUCT_NAME, "Dell XPS710"), | |
278 | }, | |
279 | }, | |
c5da9a2b AC |
280 | { /* Handle problems with rebooting on Dell DXP061 */ |
281 | .callback = set_bios_reboot, | |
282 | .ident = "Dell DXP061", | |
283 | .matches = { | |
284 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
285 | DMI_MATCH(DMI_PRODUCT_NAME, "Dell DXP061"), | |
286 | }, | |
287 | }, | |
88dff493 ZR |
288 | { /* Handle problems with rebooting on Sony VGN-Z540N */ |
289 | .callback = set_bios_reboot, | |
290 | .ident = "Sony VGN-Z540N", | |
291 | .matches = { | |
292 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
293 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-Z540N"), | |
294 | }, | |
295 | }, | |
77f32dfd DT |
296 | { /* Handle problems with rebooting on CompuLab SBC-FITPC2 */ |
297 | .callback = set_bios_reboot, | |
298 | .ident = "CompuLab SBC-FITPC2", | |
299 | .matches = { | |
300 | DMI_MATCH(DMI_SYS_VENDOR, "CompuLab"), | |
301 | DMI_MATCH(DMI_PRODUCT_NAME, "SBC-FITPC2"), | |
302 | }, | |
303 | }, | |
4832ddda LO |
304 | { /* Handle problems with rebooting on ASUS P4S800 */ |
305 | .callback = set_bios_reboot, | |
306 | .ident = "ASUS P4S800", | |
307 | .matches = { | |
308 | DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), | |
309 | DMI_MATCH(DMI_BOARD_NAME, "P4S800"), | |
310 | }, | |
311 | }, | |
b49c78d4 | 312 | { /* Handle reboot issue on Acer Aspire one */ |
1ef03890 | 313 | .callback = set_kbd_reboot, |
b49c78d4 PC |
314 | .ident = "Acer Aspire One A110", |
315 | .matches = { | |
316 | DMI_MATCH(DMI_SYS_VENDOR, "Acer"), | |
317 | DMI_MATCH(DMI_PRODUCT_NAME, "AOA110"), | |
318 | }, | |
319 | }, | |
1da177e4 LT |
320 | { } |
321 | }; | |
322 | ||
323 | static int __init reboot_init(void) | |
324 | { | |
5955633e ML |
325 | /* Only do the DMI check if reboot_type hasn't been overridden |
326 | * on the command line | |
327 | */ | |
328 | if (reboot_default) { | |
329 | dmi_check_system(reboot_dmi_table); | |
330 | } | |
1da177e4 LT |
331 | return 0; |
332 | } | |
1da177e4 LT |
333 | core_initcall(reboot_init); |
334 | ||
3d35ac34 PA |
335 | extern const unsigned char machine_real_restart_asm[]; |
336 | extern const u64 machine_real_restart_gdt[3]; | |
1da177e4 | 337 | |
3d35ac34 | 338 | void machine_real_restart(unsigned int type) |
1da177e4 | 339 | { |
3d35ac34 PA |
340 | void *restart_va; |
341 | unsigned long restart_pa; | |
342 | void (*restart_lowmem)(unsigned int); | |
343 | u64 *lowmem_gdt; | |
1da177e4 | 344 | |
1da177e4 LT |
345 | local_irq_disable(); |
346 | ||
347 | /* Write zero to CMOS register number 0x0f, which the BIOS POST | |
348 | routine will recognize as telling it to do a proper reboot. (Well | |
349 | that's what this book in front of me says -- it may only apply to | |
350 | the Phoenix BIOS though, it's not clear). At the same time, | |
351 | disable NMIs by setting the top bit in the CMOS address register, | |
352 | as we're about to do peculiar things to the CPU. I'm not sure if | |
353 | `outb_p' is needed instead of just `outb'. Use it to be on the | |
354 | safe side. (Yes, CMOS_WRITE does outb_p's. - Paul G.) | |
355 | */ | |
62dbc210 | 356 | spin_lock(&rtc_lock); |
1da177e4 | 357 | CMOS_WRITE(0x00, 0x8f); |
62dbc210 | 358 | spin_unlock(&rtc_lock); |
1da177e4 | 359 | |
1da177e4 | 360 | /* |
b40827fa | 361 | * Switch back to the initial page table. |
1da177e4 | 362 | */ |
b40827fa | 363 | load_cr3(initial_page_table); |
1da177e4 LT |
364 | |
365 | /* Write 0x1234 to absolute memory location 0x472. The BIOS reads | |
366 | this on booting to tell it to "Bypass memory test (also warm | |
367 | boot)". This seems like a fairly standard thing that gets set by | |
368 | REBOOT.COM programs, and the previous reset routine did this | |
369 | too. */ | |
1da177e4 LT |
370 | *((unsigned short *)0x472) = reboot_mode; |
371 | ||
3d35ac34 PA |
372 | /* Patch the GDT in the low memory trampoline */ |
373 | lowmem_gdt = TRAMPOLINE_SYM(machine_real_restart_gdt); | |
374 | ||
375 | restart_va = TRAMPOLINE_SYM(machine_real_restart_asm); | |
376 | restart_pa = virt_to_phys(restart_va); | |
377 | restart_lowmem = (void (*)(unsigned int))restart_pa; | |
378 | ||
379 | /* GDT[0]: GDT self-pointer */ | |
380 | lowmem_gdt[0] = | |
381 | (u64)(sizeof(machine_real_restart_gdt) - 1) + | |
382 | ((u64)virt_to_phys(lowmem_gdt) << 16); | |
383 | /* GDT[1]: 64K real mode code segment */ | |
384 | lowmem_gdt[1] = | |
385 | GDT_ENTRY(0x009b, restart_pa, 0xffff); | |
386 | ||
387 | /* Jump to the identity-mapped low memory code */ | |
388 | restart_lowmem(type); | |
1da177e4 | 389 | } |
129f6946 AD |
390 | #ifdef CONFIG_APM_MODULE |
391 | EXPORT_SYMBOL(machine_real_restart); | |
392 | #endif | |
1da177e4 | 393 | |
4d022e35 MB |
394 | #endif /* CONFIG_X86_32 */ |
395 | ||
6c6c51e4 | 396 | /* |
498cdbfb | 397 | * Some Apple MacBook and MacBookPro's needs reboot=p to be able to reboot |
6c6c51e4 PM |
398 | */ |
399 | static int __init set_pci_reboot(const struct dmi_system_id *d) | |
400 | { | |
401 | if (reboot_type != BOOT_CF9) { | |
402 | reboot_type = BOOT_CF9; | |
403 | printk(KERN_INFO "%s series board detected. " | |
404 | "Selecting PCI-method for reboots.\n", d->ident); | |
405 | } | |
406 | return 0; | |
407 | } | |
408 | ||
409 | static struct dmi_system_id __initdata pci_reboot_dmi_table[] = { | |
3e03bbea | 410 | { /* Handle problems with rebooting on Apple MacBook5 */ |
6c6c51e4 | 411 | .callback = set_pci_reboot, |
3e03bbea | 412 | .ident = "Apple MacBook5", |
6c6c51e4 PM |
413 | .matches = { |
414 | DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), | |
3e03bbea | 415 | DMI_MATCH(DMI_PRODUCT_NAME, "MacBook5"), |
6c6c51e4 PM |
416 | }, |
417 | }, | |
3e03bbea | 418 | { /* Handle problems with rebooting on Apple MacBookPro5 */ |
498cdbfb | 419 | .callback = set_pci_reboot, |
3e03bbea | 420 | .ident = "Apple MacBookPro5", |
498cdbfb OÇ |
421 | .matches = { |
422 | DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), | |
3e03bbea | 423 | DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro5"), |
498cdbfb OÇ |
424 | }, |
425 | }, | |
05154752 GH |
426 | { /* Handle problems with rebooting on Apple Macmini3,1 */ |
427 | .callback = set_pci_reboot, | |
428 | .ident = "Apple Macmini3,1", | |
429 | .matches = { | |
430 | DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), | |
431 | DMI_MATCH(DMI_PRODUCT_NAME, "Macmini3,1"), | |
432 | }, | |
433 | }, | |
0a832320 JM |
434 | { /* Handle problems with rebooting on the iMac9,1. */ |
435 | .callback = set_pci_reboot, | |
436 | .ident = "Apple iMac9,1", | |
437 | .matches = { | |
438 | DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), | |
439 | DMI_MATCH(DMI_PRODUCT_NAME, "iMac9,1"), | |
440 | }, | |
441 | }, | |
3628c3f5 MR |
442 | { /* Handle problems with rebooting on the Latitude E6320. */ |
443 | .callback = set_pci_reboot, | |
444 | .ident = "Dell Latitude E6320", | |
445 | .matches = { | |
446 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
447 | DMI_MATCH(DMI_PRODUCT_NAME, "Latitude E6320"), | |
448 | }, | |
449 | }, | |
b7798d28 DB |
450 | { /* Handle problems with rebooting on the Latitude E5420. */ |
451 | .callback = set_pci_reboot, | |
452 | .ident = "Dell Latitude E5420", | |
453 | .matches = { | |
454 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
455 | DMI_MATCH(DMI_PRODUCT_NAME, "Latitude E5420"), | |
456 | }, | |
457 | }, | |
a536877e PA |
458 | { /* Handle problems with rebooting on the Latitude E6420. */ |
459 | .callback = set_pci_reboot, | |
460 | .ident = "Dell Latitude E6420", | |
461 | .matches = { | |
462 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
463 | DMI_MATCH(DMI_PRODUCT_NAME, "Latitude E6420"), | |
464 | }, | |
465 | }, | |
6be30bb7 RW |
466 | { /* Handle problems with rebooting on the OptiPlex 990. */ |
467 | .callback = set_pci_reboot, | |
468 | .ident = "Dell OptiPlex 990", | |
469 | .matches = { | |
470 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
471 | DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 990"), | |
472 | }, | |
473 | }, | |
6c6c51e4 PM |
474 | { } |
475 | }; | |
476 | ||
477 | static int __init pci_reboot_init(void) | |
478 | { | |
5955633e ML |
479 | /* Only do the DMI check if reboot_type hasn't been overridden |
480 | * on the command line | |
481 | */ | |
482 | if (reboot_default) { | |
483 | dmi_check_system(pci_reboot_dmi_table); | |
484 | } | |
6c6c51e4 PM |
485 | return 0; |
486 | } | |
487 | core_initcall(pci_reboot_init); | |
488 | ||
4d022e35 MB |
489 | static inline void kb_wait(void) |
490 | { | |
491 | int i; | |
492 | ||
c84d6af8 AC |
493 | for (i = 0; i < 0x10000; i++) { |
494 | if ((inb(0x64) & 0x02) == 0) | |
4d022e35 | 495 | break; |
c84d6af8 AC |
496 | udelay(2); |
497 | } | |
4d022e35 MB |
498 | } |
499 | ||
9c48f1c6 | 500 | static void vmxoff_nmi(int cpu, struct pt_regs *regs) |
d176720d EH |
501 | { |
502 | cpu_emergency_vmxoff(); | |
503 | } | |
504 | ||
505 | /* Use NMIs as IPIs to tell all CPUs to disable virtualization | |
506 | */ | |
507 | static void emergency_vmx_disable_all(void) | |
508 | { | |
509 | /* Just make sure we won't change CPUs while doing this */ | |
510 | local_irq_disable(); | |
511 | ||
512 | /* We need to disable VMX on all CPUs before rebooting, otherwise | |
513 | * we risk hanging up the machine, because the CPU ignore INIT | |
514 | * signals when VMX is enabled. | |
515 | * | |
516 | * We can't take any locks and we may be on an inconsistent | |
517 | * state, so we use NMIs as IPIs to tell the other CPUs to disable | |
518 | * VMX and halt. | |
519 | * | |
520 | * For safety, we will avoid running the nmi_shootdown_cpus() | |
521 | * stuff unnecessarily, but we don't have a way to check | |
522 | * if other CPUs have VMX enabled. So we will call it only if the | |
523 | * CPU we are running on has VMX enabled. | |
524 | * | |
525 | * We will miss cases where VMX is not enabled on all CPUs. This | |
526 | * shouldn't do much harm because KVM always enable VMX on all | |
527 | * CPUs anyway. But we can miss it on the small window where KVM | |
528 | * is still enabling VMX. | |
529 | */ | |
530 | if (cpu_has_vmx() && cpu_vmx_enabled()) { | |
531 | /* Disable VMX on this CPU. | |
532 | */ | |
533 | cpu_vmxoff(); | |
534 | ||
535 | /* Halt and disable VMX on the other CPUs */ | |
536 | nmi_shootdown_cpus(vmxoff_nmi); | |
537 | ||
538 | } | |
539 | } | |
540 | ||
541 | ||
7432d149 IM |
542 | void __attribute__((weak)) mach_reboot_fixups(void) |
543 | { | |
544 | } | |
545 | ||
660e34ce MG |
546 | /* |
547 | * Windows compatible x86 hardware expects the following on reboot: | |
548 | * | |
549 | * 1) If the FADT has the ACPI reboot register flag set, try it | |
550 | * 2) If still alive, write to the keyboard controller | |
551 | * 3) If still alive, write to the ACPI reboot register again | |
552 | * 4) If still alive, write to the keyboard controller again | |
553 | * | |
554 | * If the machine is still alive at this stage, it gives up. We default to | |
555 | * following the same pattern, except that if we're still alive after (4) we'll | |
556 | * try to force a triple fault and then cycle between hitting the keyboard | |
557 | * controller and doing that | |
558 | */ | |
416e2d63 | 559 | static void native_machine_emergency_restart(void) |
1da177e4 | 560 | { |
4d022e35 | 561 | int i; |
660e34ce MG |
562 | int attempt = 0; |
563 | int orig_reboot_type = reboot_type; | |
4d022e35 | 564 | |
d176720d EH |
565 | if (reboot_emergency) |
566 | emergency_vmx_disable_all(); | |
567 | ||
840c2baf JC |
568 | tboot_shutdown(TB_SHUTDOWN_REBOOT); |
569 | ||
4d022e35 MB |
570 | /* Tell the BIOS if we want cold or warm reboot */ |
571 | *((unsigned short *)__va(0x472)) = reboot_mode; | |
572 | ||
573 | for (;;) { | |
574 | /* Could also try the reset bit in the Hammer NB */ | |
575 | switch (reboot_type) { | |
576 | case BOOT_KBD: | |
7432d149 IM |
577 | mach_reboot_fixups(); /* for board specific fixups */ |
578 | ||
4d022e35 MB |
579 | for (i = 0; i < 10; i++) { |
580 | kb_wait(); | |
581 | udelay(50); | |
582 | outb(0xfe, 0x64); /* pulse reset low */ | |
583 | udelay(50); | |
584 | } | |
660e34ce MG |
585 | if (attempt == 0 && orig_reboot_type == BOOT_ACPI) { |
586 | attempt = 1; | |
587 | reboot_type = BOOT_ACPI; | |
588 | } else { | |
589 | reboot_type = BOOT_TRIPLE; | |
590 | } | |
591 | break; | |
4d022e35 MB |
592 | |
593 | case BOOT_TRIPLE: | |
ebdd561a | 594 | load_idt(&no_idt); |
4d022e35 MB |
595 | __asm__ __volatile__("int3"); |
596 | ||
597 | reboot_type = BOOT_KBD; | |
598 | break; | |
599 | ||
600 | #ifdef CONFIG_X86_32 | |
601 | case BOOT_BIOS: | |
3d35ac34 | 602 | machine_real_restart(MRR_BIOS); |
4d022e35 MB |
603 | |
604 | reboot_type = BOOT_KBD; | |
605 | break; | |
606 | #endif | |
607 | ||
608 | case BOOT_ACPI: | |
609 | acpi_reboot(); | |
610 | reboot_type = BOOT_KBD; | |
611 | break; | |
612 | ||
4d022e35 MB |
613 | case BOOT_EFI: |
614 | if (efi_enabled) | |
14d7ca5c PA |
615 | efi.reset_system(reboot_mode ? |
616 | EFI_RESET_WARM : | |
617 | EFI_RESET_COLD, | |
4d022e35 | 618 | EFI_SUCCESS, 0, NULL); |
b47b9288 | 619 | reboot_type = BOOT_KBD; |
14d7ca5c | 620 | break; |
4d022e35 | 621 | |
14d7ca5c PA |
622 | case BOOT_CF9: |
623 | port_cf9_safe = true; | |
624 | /* fall through */ | |
4d022e35 | 625 | |
14d7ca5c PA |
626 | case BOOT_CF9_COND: |
627 | if (port_cf9_safe) { | |
628 | u8 cf9 = inb(0xcf9) & ~6; | |
629 | outb(cf9|2, 0xcf9); /* Request hard reset */ | |
630 | udelay(50); | |
631 | outb(cf9|6, 0xcf9); /* Actually do the reset */ | |
632 | udelay(50); | |
633 | } | |
4d022e35 MB |
634 | reboot_type = BOOT_KBD; |
635 | break; | |
636 | } | |
637 | } | |
638 | } | |
639 | ||
3c62c625 | 640 | void native_machine_shutdown(void) |
4d022e35 MB |
641 | { |
642 | /* Stop the cpus and apics */ | |
1da177e4 | 643 | #ifdef CONFIG_SMP |
dd2a1305 EB |
644 | |
645 | /* The boot cpu is always logical cpu 0 */ | |
65c01184 | 646 | int reboot_cpu_id = 0; |
dd2a1305 | 647 | |
4d022e35 | 648 | #ifdef CONFIG_X86_32 |
dd2a1305 | 649 | /* See if there has been given a command line override */ |
9628937d | 650 | if ((reboot_cpu != -1) && (reboot_cpu < nr_cpu_ids) && |
0bc3cc03 | 651 | cpu_online(reboot_cpu)) |
dd2a1305 | 652 | reboot_cpu_id = reboot_cpu; |
4d022e35 | 653 | #endif |
1da177e4 | 654 | |
4d022e35 | 655 | /* Make certain the cpu I'm about to reboot on is online */ |
0bc3cc03 | 656 | if (!cpu_online(reboot_cpu_id)) |
dd2a1305 | 657 | reboot_cpu_id = smp_processor_id(); |
dd2a1305 EB |
658 | |
659 | /* Make certain I only run on the appropriate processor */ | |
9628937d | 660 | set_cpus_allowed_ptr(current, cpumask_of(reboot_cpu_id)); |
dd2a1305 | 661 | |
4d022e35 MB |
662 | /* O.K Now that I'm on the appropriate processor, |
663 | * stop all of the others. | |
1da177e4 | 664 | */ |
76fac077 | 665 | stop_other_cpus(); |
4d022e35 | 666 | #endif |
1da177e4 LT |
667 | |
668 | lapic_shutdown(); | |
669 | ||
670 | #ifdef CONFIG_X86_IO_APIC | |
671 | disable_IO_APIC(); | |
672 | #endif | |
4d022e35 | 673 | |
c86c7fbc OH |
674 | #ifdef CONFIG_HPET_TIMER |
675 | hpet_disable(); | |
676 | #endif | |
dd2a1305 | 677 | |
4d022e35 | 678 | #ifdef CONFIG_X86_64 |
338bac52 | 679 | x86_platform.iommu_shutdown(); |
4d022e35 | 680 | #endif |
973efae2 JF |
681 | } |
682 | ||
d176720d EH |
683 | static void __machine_emergency_restart(int emergency) |
684 | { | |
685 | reboot_emergency = emergency; | |
686 | machine_ops.emergency_restart(); | |
687 | } | |
688 | ||
416e2d63 | 689 | static void native_machine_restart(char *__unused) |
dd2a1305 | 690 | { |
4d022e35 | 691 | printk("machine restart\n"); |
1da177e4 | 692 | |
4d022e35 MB |
693 | if (!reboot_force) |
694 | machine_shutdown(); | |
d176720d | 695 | __machine_emergency_restart(0); |
4a1421f8 EB |
696 | } |
697 | ||
416e2d63 | 698 | static void native_machine_halt(void) |
1da177e4 | 699 | { |
d3ec5cae IV |
700 | /* stop other cpus and apics */ |
701 | machine_shutdown(); | |
702 | ||
840c2baf JC |
703 | tboot_shutdown(TB_SHUTDOWN_HALT); |
704 | ||
d3ec5cae IV |
705 | /* stop this cpu */ |
706 | stop_this_cpu(NULL); | |
1da177e4 LT |
707 | } |
708 | ||
416e2d63 | 709 | static void native_machine_power_off(void) |
1da177e4 | 710 | { |
6e3fbee5 | 711 | if (pm_power_off) { |
4d022e35 MB |
712 | if (!reboot_force) |
713 | machine_shutdown(); | |
1da177e4 | 714 | pm_power_off(); |
6e3fbee5 | 715 | } |
840c2baf JC |
716 | /* a fallback in case there is no PM info available */ |
717 | tboot_shutdown(TB_SHUTDOWN_HALT); | |
1da177e4 LT |
718 | } |
719 | ||
07f3331c | 720 | struct machine_ops machine_ops = { |
416e2d63 JB |
721 | .power_off = native_machine_power_off, |
722 | .shutdown = native_machine_shutdown, | |
723 | .emergency_restart = native_machine_emergency_restart, | |
724 | .restart = native_machine_restart, | |
ed23dc6f GC |
725 | .halt = native_machine_halt, |
726 | #ifdef CONFIG_KEXEC | |
727 | .crash_shutdown = native_machine_crash_shutdown, | |
728 | #endif | |
07f3331c | 729 | }; |
416e2d63 JB |
730 | |
731 | void machine_power_off(void) | |
732 | { | |
733 | machine_ops.power_off(); | |
734 | } | |
735 | ||
736 | void machine_shutdown(void) | |
737 | { | |
738 | machine_ops.shutdown(); | |
739 | } | |
740 | ||
741 | void machine_emergency_restart(void) | |
742 | { | |
d176720d | 743 | __machine_emergency_restart(1); |
416e2d63 JB |
744 | } |
745 | ||
746 | void machine_restart(char *cmd) | |
747 | { | |
748 | machine_ops.restart(cmd); | |
749 | } | |
750 | ||
751 | void machine_halt(void) | |
752 | { | |
753 | machine_ops.halt(); | |
754 | } | |
755 | ||
ed23dc6f GC |
756 | #ifdef CONFIG_KEXEC |
757 | void machine_crash_shutdown(struct pt_regs *regs) | |
758 | { | |
759 | machine_ops.crash_shutdown(regs); | |
760 | } | |
761 | #endif | |
2ddded21 EH |
762 | |
763 | ||
bb8dd270 | 764 | #if defined(CONFIG_SMP) |
2ddded21 EH |
765 | |
766 | /* This keeps a track of which one is crashing cpu. */ | |
767 | static int crashing_cpu; | |
768 | static nmi_shootdown_cb shootdown_callback; | |
769 | ||
770 | static atomic_t waiting_for_crash_ipi; | |
771 | ||
9c48f1c6 | 772 | static int crash_nmi_callback(unsigned int val, struct pt_regs *regs) |
2ddded21 EH |
773 | { |
774 | int cpu; | |
775 | ||
2ddded21 EH |
776 | cpu = raw_smp_processor_id(); |
777 | ||
778 | /* Don't do anything if this handler is invoked on crashing cpu. | |
779 | * Otherwise, system will completely hang. Crashing cpu can get | |
780 | * an NMI if system was initially booted with nmi_watchdog parameter. | |
781 | */ | |
782 | if (cpu == crashing_cpu) | |
9c48f1c6 | 783 | return NMI_HANDLED; |
2ddded21 EH |
784 | local_irq_disable(); |
785 | ||
9c48f1c6 | 786 | shootdown_callback(cpu, regs); |
2ddded21 EH |
787 | |
788 | atomic_dec(&waiting_for_crash_ipi); | |
789 | /* Assume hlt works */ | |
790 | halt(); | |
791 | for (;;) | |
792 | cpu_relax(); | |
793 | ||
9c48f1c6 | 794 | return NMI_HANDLED; |
2ddded21 EH |
795 | } |
796 | ||
797 | static void smp_send_nmi_allbutself(void) | |
798 | { | |
dac5f412 | 799 | apic->send_IPI_allbutself(NMI_VECTOR); |
2ddded21 EH |
800 | } |
801 | ||
bb8dd270 EH |
802 | /* Halt all other CPUs, calling the specified function on each of them |
803 | * | |
804 | * This function can be used to halt all other CPUs on crash | |
805 | * or emergency reboot time. The function passed as parameter | |
806 | * will be called inside a NMI handler on all CPUs. | |
807 | */ | |
2ddded21 EH |
808 | void nmi_shootdown_cpus(nmi_shootdown_cb callback) |
809 | { | |
810 | unsigned long msecs; | |
c415b3dc | 811 | local_irq_disable(); |
2ddded21 EH |
812 | |
813 | /* Make a note of crashing cpu. Will be used in NMI callback.*/ | |
814 | crashing_cpu = safe_smp_processor_id(); | |
815 | ||
816 | shootdown_callback = callback; | |
817 | ||
818 | atomic_set(&waiting_for_crash_ipi, num_online_cpus() - 1); | |
819 | /* Would it be better to replace the trap vector here? */ | |
9c48f1c6 DZ |
820 | if (register_nmi_handler(NMI_LOCAL, crash_nmi_callback, |
821 | NMI_FLAG_FIRST, "crash")) | |
2ddded21 EH |
822 | return; /* return what? */ |
823 | /* Ensure the new callback function is set before sending | |
824 | * out the NMI | |
825 | */ | |
826 | wmb(); | |
827 | ||
828 | smp_send_nmi_allbutself(); | |
829 | ||
830 | msecs = 1000; /* Wait at most a second for the other cpus to stop */ | |
831 | while ((atomic_read(&waiting_for_crash_ipi) > 0) && msecs) { | |
832 | mdelay(1); | |
833 | msecs--; | |
834 | } | |
835 | ||
836 | /* Leave the nmi callback set */ | |
837 | } | |
bb8dd270 EH |
838 | #else /* !CONFIG_SMP */ |
839 | void nmi_shootdown_cpus(nmi_shootdown_cb callback) | |
840 | { | |
841 | /* No other CPUs to shoot down */ | |
842 | } | |
2ddded21 | 843 | #endif |