Commit | Line | Data |
---|---|---|
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> |
4d022e35 MB |
9 | #include <acpi/reboot.h> |
10 | #include <asm/io.h> | |
1da177e4 | 11 | #include <asm/apic.h> |
4d37e7e3 | 12 | #include <asm/desc.h> |
4d022e35 | 13 | #include <asm/hpet.h> |
68db065c | 14 | #include <asm/pgtable.h> |
4412620f | 15 | #include <asm/proto.h> |
973efae2 | 16 | #include <asm/reboot_fixups.h> |
07f3331c | 17 | #include <asm/reboot.h> |
82487711 | 18 | #include <asm/pci_x86.h> |
d176720d | 19 | #include <asm/virtext.h> |
96b89dc6 | 20 | #include <asm/cpu.h> |
c410b830 | 21 | #include <asm/nmi.h> |
1da177e4 | 22 | |
4d022e35 | 23 | #ifdef CONFIG_X86_32 |
4d022e35 MB |
24 | # include <linux/ctype.h> |
25 | # include <linux/mc146818rtc.h> | |
4d022e35 | 26 | #else |
338bac52 | 27 | # include <asm/x86_init.h> |
4d022e35 MB |
28 | #endif |
29 | ||
1da177e4 LT |
30 | /* |
31 | * Power off function, if any | |
32 | */ | |
33 | void (*pm_power_off)(void); | |
129f6946 | 34 | EXPORT_SYMBOL(pm_power_off); |
1da177e4 | 35 | |
ebdd561a | 36 | static const struct desc_ptr no_idt = {}; |
1da177e4 | 37 | static int reboot_mode; |
8d00450d | 38 | enum reboot_type reboot_type = BOOT_KBD; |
4d022e35 | 39 | int reboot_force; |
1da177e4 | 40 | |
4d022e35 | 41 | #if defined(CONFIG_X86_32) && defined(CONFIG_SMP) |
1da177e4 | 42 | static int reboot_cpu = -1; |
1da177e4 | 43 | #endif |
4d022e35 | 44 | |
d176720d EH |
45 | /* This is set if we need to go through the 'emergency' path. |
46 | * When machine_emergency_restart() is called, we may be on | |
47 | * an inconsistent state and won't be able to do a clean cleanup | |
48 | */ | |
49 | static int reboot_emergency; | |
50 | ||
14d7ca5c PA |
51 | /* This is set by the PCI code if either type 1 or type 2 PCI is detected */ |
52 | bool port_cf9_safe = false; | |
53 | ||
54 | /* reboot=b[ios] | s[mp] | t[riple] | k[bd] | e[fi] [, [w]arm | [c]old] | p[ci] | |
4d022e35 MB |
55 | warm Don't set the cold reboot flag |
56 | cold Set the cold reboot flag | |
57 | bios Reboot by jumping through the BIOS (only for X86_32) | |
58 | smp Reboot by executing reset on BSP or other CPU (only for X86_32) | |
59 | triple Force a triple fault (init) | |
60 | kbd Use the keyboard controller. cold reset (default) | |
61 | acpi Use the RESET_REG in the FADT | |
62 | efi Use efi reset_system runtime service | |
14d7ca5c | 63 | pci Use the so-called "PCI reset register", CF9 |
4d022e35 MB |
64 | force Avoid anything that could hang. |
65 | */ | |
1da177e4 LT |
66 | static int __init reboot_setup(char *str) |
67 | { | |
4d022e35 | 68 | for (;;) { |
1da177e4 | 69 | switch (*str) { |
4d022e35 | 70 | case 'w': |
1da177e4 LT |
71 | reboot_mode = 0x1234; |
72 | break; | |
4d022e35 MB |
73 | |
74 | case 'c': | |
75 | reboot_mode = 0; | |
1da177e4 | 76 | break; |
4d022e35 MB |
77 | |
78 | #ifdef CONFIG_X86_32 | |
1da177e4 | 79 | #ifdef CONFIG_SMP |
4d022e35 | 80 | case 's': |
6f673d83 | 81 | if (isdigit(*(str+1))) { |
1da177e4 | 82 | reboot_cpu = (int) (*(str+1) - '0'); |
6f673d83 | 83 | if (isdigit(*(str+2))) |
1da177e4 LT |
84 | reboot_cpu = reboot_cpu*10 + (int)(*(str+2) - '0'); |
85 | } | |
4d022e35 MB |
86 | /* we will leave sorting out the final value |
87 | when we are ready to reboot, since we might not | |
f6e9456c | 88 | have detected BSP APIC ID or smp_num_cpu */ |
1da177e4 | 89 | break; |
4d022e35 MB |
90 | #endif /* CONFIG_SMP */ |
91 | ||
92 | case 'b': | |
1da177e4 | 93 | #endif |
4d022e35 MB |
94 | case 'a': |
95 | case 'k': | |
96 | case 't': | |
97 | case 'e': | |
14d7ca5c | 98 | case 'p': |
4d022e35 MB |
99 | reboot_type = *str; |
100 | break; | |
101 | ||
102 | case 'f': | |
103 | reboot_force = 1; | |
104 | break; | |
1da177e4 | 105 | } |
4d022e35 MB |
106 | |
107 | str = strchr(str, ','); | |
108 | if (str) | |
1da177e4 LT |
109 | str++; |
110 | else | |
111 | break; | |
112 | } | |
113 | return 1; | |
114 | } | |
115 | ||
116 | __setup("reboot=", reboot_setup); | |
117 | ||
4d022e35 MB |
118 | |
119 | #ifdef CONFIG_X86_32 | |
1da177e4 LT |
120 | /* |
121 | * Reboot options and system auto-detection code provided by | |
122 | * Dell Inc. so their systems "just work". :-) | |
123 | */ | |
124 | ||
125 | /* | |
4d022e35 MB |
126 | * Some machines require the "reboot=b" commandline option, |
127 | * this quirk makes that automatic. | |
1da177e4 | 128 | */ |
1855256c | 129 | static int __init set_bios_reboot(const struct dmi_system_id *d) |
1da177e4 | 130 | { |
4d022e35 MB |
131 | if (reboot_type != BOOT_BIOS) { |
132 | reboot_type = BOOT_BIOS; | |
1da177e4 LT |
133 | printk(KERN_INFO "%s series board detected. Selecting BIOS-method for reboots.\n", d->ident); |
134 | } | |
135 | return 0; | |
136 | } | |
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 | }, | |
df2edcf3 JJ |
163 | { /* Handle problems with rebooting on Dell Optiplex 745's SFF*/ |
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 | }, | |
fc115bf1 CK |
171 | { /* Handle problems with rebooting on Dell Optiplex 745's DFF*/ |
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 | }, | |
fc1c8925 HAA |
180 | { /* Handle problems with rebooting on Dell Optiplex 745 with 0KW626 */ |
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 | }, | |
093bac15 SC |
189 | { /* Handle problems with rebooting on Dell Optiplex 330 with 0KP561 */ |
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 | }, | |
4a4aca64 JD |
198 | { /* Handle problems with rebooting on Dell Optiplex 360 with 0T656F */ |
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 | }, | |
35ea63d7 LO |
207 | { /* Handle problems with rebooting on Dell OptiPlex 760 with 0G919G*/ |
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 | }, | |
77f32dfd DT |
272 | { /* Handle problems with rebooting on CompuLab SBC-FITPC2 */ |
273 | .callback = set_bios_reboot, | |
274 | .ident = "CompuLab SBC-FITPC2", | |
275 | .matches = { | |
276 | DMI_MATCH(DMI_SYS_VENDOR, "CompuLab"), | |
277 | DMI_MATCH(DMI_PRODUCT_NAME, "SBC-FITPC2"), | |
278 | }, | |
279 | }, | |
4832ddda LO |
280 | { /* Handle problems with rebooting on ASUS P4S800 */ |
281 | .callback = set_bios_reboot, | |
282 | .ident = "ASUS P4S800", | |
283 | .matches = { | |
284 | DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), | |
285 | DMI_MATCH(DMI_BOARD_NAME, "P4S800"), | |
286 | }, | |
287 | }, | |
1da177e4 LT |
288 | { } |
289 | }; | |
290 | ||
291 | static int __init reboot_init(void) | |
292 | { | |
293 | dmi_check_system(reboot_dmi_table); | |
294 | return 0; | |
295 | } | |
1da177e4 LT |
296 | core_initcall(reboot_init); |
297 | ||
3d35ac34 PA |
298 | extern const unsigned char machine_real_restart_asm[]; |
299 | extern const u64 machine_real_restart_gdt[3]; | |
1da177e4 | 300 | |
3d35ac34 | 301 | void machine_real_restart(unsigned int type) |
1da177e4 | 302 | { |
3d35ac34 PA |
303 | void *restart_va; |
304 | unsigned long restart_pa; | |
305 | void (*restart_lowmem)(unsigned int); | |
306 | u64 *lowmem_gdt; | |
1da177e4 | 307 | |
1da177e4 LT |
308 | local_irq_disable(); |
309 | ||
310 | /* Write zero to CMOS register number 0x0f, which the BIOS POST | |
311 | routine will recognize as telling it to do a proper reboot. (Well | |
312 | that's what this book in front of me says -- it may only apply to | |
313 | the Phoenix BIOS though, it's not clear). At the same time, | |
314 | disable NMIs by setting the top bit in the CMOS address register, | |
315 | as we're about to do peculiar things to the CPU. I'm not sure if | |
316 | `outb_p' is needed instead of just `outb'. Use it to be on the | |
317 | safe side. (Yes, CMOS_WRITE does outb_p's. - Paul G.) | |
318 | */ | |
62dbc210 | 319 | spin_lock(&rtc_lock); |
1da177e4 | 320 | CMOS_WRITE(0x00, 0x8f); |
62dbc210 | 321 | spin_unlock(&rtc_lock); |
1da177e4 | 322 | |
1da177e4 | 323 | /* |
b40827fa | 324 | * Switch back to the initial page table. |
1da177e4 | 325 | */ |
b40827fa | 326 | load_cr3(initial_page_table); |
1da177e4 LT |
327 | |
328 | /* Write 0x1234 to absolute memory location 0x472. The BIOS reads | |
329 | this on booting to tell it to "Bypass memory test (also warm | |
330 | boot)". This seems like a fairly standard thing that gets set by | |
331 | REBOOT.COM programs, and the previous reset routine did this | |
332 | too. */ | |
1da177e4 LT |
333 | *((unsigned short *)0x472) = reboot_mode; |
334 | ||
3d35ac34 PA |
335 | /* Patch the GDT in the low memory trampoline */ |
336 | lowmem_gdt = TRAMPOLINE_SYM(machine_real_restart_gdt); | |
337 | ||
338 | restart_va = TRAMPOLINE_SYM(machine_real_restart_asm); | |
339 | restart_pa = virt_to_phys(restart_va); | |
340 | restart_lowmem = (void (*)(unsigned int))restart_pa; | |
341 | ||
342 | /* GDT[0]: GDT self-pointer */ | |
343 | lowmem_gdt[0] = | |
344 | (u64)(sizeof(machine_real_restart_gdt) - 1) + | |
345 | ((u64)virt_to_phys(lowmem_gdt) << 16); | |
346 | /* GDT[1]: 64K real mode code segment */ | |
347 | lowmem_gdt[1] = | |
348 | GDT_ENTRY(0x009b, restart_pa, 0xffff); | |
349 | ||
350 | /* Jump to the identity-mapped low memory code */ | |
351 | restart_lowmem(type); | |
1da177e4 | 352 | } |
129f6946 AD |
353 | #ifdef CONFIG_APM_MODULE |
354 | EXPORT_SYMBOL(machine_real_restart); | |
355 | #endif | |
1da177e4 | 356 | |
4d022e35 MB |
357 | #endif /* CONFIG_X86_32 */ |
358 | ||
6c6c51e4 | 359 | /* |
498cdbfb | 360 | * Some Apple MacBook and MacBookPro's needs reboot=p to be able to reboot |
6c6c51e4 PM |
361 | */ |
362 | static int __init set_pci_reboot(const struct dmi_system_id *d) | |
363 | { | |
364 | if (reboot_type != BOOT_CF9) { | |
365 | reboot_type = BOOT_CF9; | |
366 | printk(KERN_INFO "%s series board detected. " | |
367 | "Selecting PCI-method for reboots.\n", d->ident); | |
368 | } | |
369 | return 0; | |
370 | } | |
371 | ||
372 | static struct dmi_system_id __initdata pci_reboot_dmi_table[] = { | |
3e03bbea | 373 | { /* Handle problems with rebooting on Apple MacBook5 */ |
6c6c51e4 | 374 | .callback = set_pci_reboot, |
3e03bbea | 375 | .ident = "Apple MacBook5", |
6c6c51e4 PM |
376 | .matches = { |
377 | DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), | |
3e03bbea | 378 | DMI_MATCH(DMI_PRODUCT_NAME, "MacBook5"), |
6c6c51e4 PM |
379 | }, |
380 | }, | |
3e03bbea | 381 | { /* Handle problems with rebooting on Apple MacBookPro5 */ |
498cdbfb | 382 | .callback = set_pci_reboot, |
3e03bbea | 383 | .ident = "Apple MacBookPro5", |
498cdbfb OÇ |
384 | .matches = { |
385 | DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), | |
3e03bbea | 386 | DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro5"), |
498cdbfb OÇ |
387 | }, |
388 | }, | |
05154752 GH |
389 | { /* Handle problems with rebooting on Apple Macmini3,1 */ |
390 | .callback = set_pci_reboot, | |
391 | .ident = "Apple Macmini3,1", | |
392 | .matches = { | |
393 | DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), | |
394 | DMI_MATCH(DMI_PRODUCT_NAME, "Macmini3,1"), | |
395 | }, | |
396 | }, | |
0a832320 JM |
397 | { /* Handle problems with rebooting on the iMac9,1. */ |
398 | .callback = set_pci_reboot, | |
399 | .ident = "Apple iMac9,1", | |
400 | .matches = { | |
401 | DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), | |
402 | DMI_MATCH(DMI_PRODUCT_NAME, "iMac9,1"), | |
403 | }, | |
404 | }, | |
6c6c51e4 PM |
405 | { } |
406 | }; | |
407 | ||
408 | static int __init pci_reboot_init(void) | |
409 | { | |
410 | dmi_check_system(pci_reboot_dmi_table); | |
411 | return 0; | |
412 | } | |
413 | core_initcall(pci_reboot_init); | |
414 | ||
4d022e35 MB |
415 | static inline void kb_wait(void) |
416 | { | |
417 | int i; | |
418 | ||
c84d6af8 AC |
419 | for (i = 0; i < 0x10000; i++) { |
420 | if ((inb(0x64) & 0x02) == 0) | |
4d022e35 | 421 | break; |
c84d6af8 AC |
422 | udelay(2); |
423 | } | |
4d022e35 MB |
424 | } |
425 | ||
d176720d EH |
426 | static void vmxoff_nmi(int cpu, struct die_args *args) |
427 | { | |
428 | cpu_emergency_vmxoff(); | |
429 | } | |
430 | ||
431 | /* Use NMIs as IPIs to tell all CPUs to disable virtualization | |
432 | */ | |
433 | static void emergency_vmx_disable_all(void) | |
434 | { | |
435 | /* Just make sure we won't change CPUs while doing this */ | |
436 | local_irq_disable(); | |
437 | ||
438 | /* We need to disable VMX on all CPUs before rebooting, otherwise | |
439 | * we risk hanging up the machine, because the CPU ignore INIT | |
440 | * signals when VMX is enabled. | |
441 | * | |
442 | * We can't take any locks and we may be on an inconsistent | |
443 | * state, so we use NMIs as IPIs to tell the other CPUs to disable | |
444 | * VMX and halt. | |
445 | * | |
446 | * For safety, we will avoid running the nmi_shootdown_cpus() | |
447 | * stuff unnecessarily, but we don't have a way to check | |
448 | * if other CPUs have VMX enabled. So we will call it only if the | |
449 | * CPU we are running on has VMX enabled. | |
450 | * | |
451 | * We will miss cases where VMX is not enabled on all CPUs. This | |
452 | * shouldn't do much harm because KVM always enable VMX on all | |
453 | * CPUs anyway. But we can miss it on the small window where KVM | |
454 | * is still enabling VMX. | |
455 | */ | |
456 | if (cpu_has_vmx() && cpu_vmx_enabled()) { | |
457 | /* Disable VMX on this CPU. | |
458 | */ | |
459 | cpu_vmxoff(); | |
460 | ||
461 | /* Halt and disable VMX on the other CPUs */ | |
462 | nmi_shootdown_cpus(vmxoff_nmi); | |
463 | ||
464 | } | |
465 | } | |
466 | ||
467 | ||
7432d149 IM |
468 | void __attribute__((weak)) mach_reboot_fixups(void) |
469 | { | |
470 | } | |
471 | ||
416e2d63 | 472 | static void native_machine_emergency_restart(void) |
1da177e4 | 473 | { |
4d022e35 MB |
474 | int i; |
475 | ||
d176720d EH |
476 | if (reboot_emergency) |
477 | emergency_vmx_disable_all(); | |
478 | ||
840c2baf JC |
479 | tboot_shutdown(TB_SHUTDOWN_REBOOT); |
480 | ||
4d022e35 MB |
481 | /* Tell the BIOS if we want cold or warm reboot */ |
482 | *((unsigned short *)__va(0x472)) = reboot_mode; | |
483 | ||
484 | for (;;) { | |
485 | /* Could also try the reset bit in the Hammer NB */ | |
486 | switch (reboot_type) { | |
487 | case BOOT_KBD: | |
7432d149 IM |
488 | mach_reboot_fixups(); /* for board specific fixups */ |
489 | ||
4d022e35 MB |
490 | for (i = 0; i < 10; i++) { |
491 | kb_wait(); | |
492 | udelay(50); | |
493 | outb(0xfe, 0x64); /* pulse reset low */ | |
494 | udelay(50); | |
495 | } | |
496 | ||
497 | case BOOT_TRIPLE: | |
ebdd561a | 498 | load_idt(&no_idt); |
4d022e35 MB |
499 | __asm__ __volatile__("int3"); |
500 | ||
501 | reboot_type = BOOT_KBD; | |
502 | break; | |
503 | ||
504 | #ifdef CONFIG_X86_32 | |
505 | case BOOT_BIOS: | |
3d35ac34 | 506 | machine_real_restart(MRR_BIOS); |
4d022e35 MB |
507 | |
508 | reboot_type = BOOT_KBD; | |
509 | break; | |
510 | #endif | |
511 | ||
512 | case BOOT_ACPI: | |
513 | acpi_reboot(); | |
514 | reboot_type = BOOT_KBD; | |
515 | break; | |
516 | ||
4d022e35 MB |
517 | case BOOT_EFI: |
518 | if (efi_enabled) | |
14d7ca5c PA |
519 | efi.reset_system(reboot_mode ? |
520 | EFI_RESET_WARM : | |
521 | EFI_RESET_COLD, | |
4d022e35 | 522 | EFI_SUCCESS, 0, NULL); |
b47b9288 | 523 | reboot_type = BOOT_KBD; |
14d7ca5c | 524 | break; |
4d022e35 | 525 | |
14d7ca5c PA |
526 | case BOOT_CF9: |
527 | port_cf9_safe = true; | |
528 | /* fall through */ | |
4d022e35 | 529 | |
14d7ca5c PA |
530 | case BOOT_CF9_COND: |
531 | if (port_cf9_safe) { | |
532 | u8 cf9 = inb(0xcf9) & ~6; | |
533 | outb(cf9|2, 0xcf9); /* Request hard reset */ | |
534 | udelay(50); | |
535 | outb(cf9|6, 0xcf9); /* Actually do the reset */ | |
536 | udelay(50); | |
537 | } | |
4d022e35 MB |
538 | reboot_type = BOOT_KBD; |
539 | break; | |
540 | } | |
541 | } | |
542 | } | |
543 | ||
3c62c625 | 544 | void native_machine_shutdown(void) |
4d022e35 MB |
545 | { |
546 | /* Stop the cpus and apics */ | |
1da177e4 | 547 | #ifdef CONFIG_SMP |
dd2a1305 EB |
548 | |
549 | /* The boot cpu is always logical cpu 0 */ | |
65c01184 | 550 | int reboot_cpu_id = 0; |
dd2a1305 | 551 | |
4d022e35 | 552 | #ifdef CONFIG_X86_32 |
dd2a1305 | 553 | /* See if there has been given a command line override */ |
9628937d | 554 | if ((reboot_cpu != -1) && (reboot_cpu < nr_cpu_ids) && |
0bc3cc03 | 555 | cpu_online(reboot_cpu)) |
dd2a1305 | 556 | reboot_cpu_id = reboot_cpu; |
4d022e35 | 557 | #endif |
1da177e4 | 558 | |
4d022e35 | 559 | /* Make certain the cpu I'm about to reboot on is online */ |
0bc3cc03 | 560 | if (!cpu_online(reboot_cpu_id)) |
dd2a1305 | 561 | reboot_cpu_id = smp_processor_id(); |
dd2a1305 EB |
562 | |
563 | /* Make certain I only run on the appropriate processor */ | |
9628937d | 564 | set_cpus_allowed_ptr(current, cpumask_of(reboot_cpu_id)); |
dd2a1305 | 565 | |
4d022e35 MB |
566 | /* O.K Now that I'm on the appropriate processor, |
567 | * stop all of the others. | |
1da177e4 | 568 | */ |
76fac077 | 569 | stop_other_cpus(); |
4d022e35 | 570 | #endif |
1da177e4 LT |
571 | |
572 | lapic_shutdown(); | |
573 | ||
574 | #ifdef CONFIG_X86_IO_APIC | |
575 | disable_IO_APIC(); | |
576 | #endif | |
4d022e35 | 577 | |
c86c7fbc OH |
578 | #ifdef CONFIG_HPET_TIMER |
579 | hpet_disable(); | |
580 | #endif | |
dd2a1305 | 581 | |
4d022e35 | 582 | #ifdef CONFIG_X86_64 |
338bac52 | 583 | x86_platform.iommu_shutdown(); |
4d022e35 | 584 | #endif |
973efae2 JF |
585 | } |
586 | ||
d176720d EH |
587 | static void __machine_emergency_restart(int emergency) |
588 | { | |
589 | reboot_emergency = emergency; | |
590 | machine_ops.emergency_restart(); | |
591 | } | |
592 | ||
416e2d63 | 593 | static void native_machine_restart(char *__unused) |
dd2a1305 | 594 | { |
4d022e35 | 595 | printk("machine restart\n"); |
1da177e4 | 596 | |
4d022e35 MB |
597 | if (!reboot_force) |
598 | machine_shutdown(); | |
d176720d | 599 | __machine_emergency_restart(0); |
4a1421f8 EB |
600 | } |
601 | ||
416e2d63 | 602 | static void native_machine_halt(void) |
1da177e4 | 603 | { |
d3ec5cae IV |
604 | /* stop other cpus and apics */ |
605 | machine_shutdown(); | |
606 | ||
840c2baf JC |
607 | tboot_shutdown(TB_SHUTDOWN_HALT); |
608 | ||
d3ec5cae IV |
609 | /* stop this cpu */ |
610 | stop_this_cpu(NULL); | |
1da177e4 LT |
611 | } |
612 | ||
416e2d63 | 613 | static void native_machine_power_off(void) |
1da177e4 | 614 | { |
6e3fbee5 | 615 | if (pm_power_off) { |
4d022e35 MB |
616 | if (!reboot_force) |
617 | machine_shutdown(); | |
1da177e4 | 618 | pm_power_off(); |
6e3fbee5 | 619 | } |
840c2baf JC |
620 | /* a fallback in case there is no PM info available */ |
621 | tboot_shutdown(TB_SHUTDOWN_HALT); | |
1da177e4 LT |
622 | } |
623 | ||
07f3331c | 624 | struct machine_ops machine_ops = { |
416e2d63 JB |
625 | .power_off = native_machine_power_off, |
626 | .shutdown = native_machine_shutdown, | |
627 | .emergency_restart = native_machine_emergency_restart, | |
628 | .restart = native_machine_restart, | |
ed23dc6f GC |
629 | .halt = native_machine_halt, |
630 | #ifdef CONFIG_KEXEC | |
631 | .crash_shutdown = native_machine_crash_shutdown, | |
632 | #endif | |
07f3331c | 633 | }; |
416e2d63 JB |
634 | |
635 | void machine_power_off(void) | |
636 | { | |
637 | machine_ops.power_off(); | |
638 | } | |
639 | ||
640 | void machine_shutdown(void) | |
641 | { | |
642 | machine_ops.shutdown(); | |
643 | } | |
644 | ||
645 | void machine_emergency_restart(void) | |
646 | { | |
d176720d | 647 | __machine_emergency_restart(1); |
416e2d63 JB |
648 | } |
649 | ||
650 | void machine_restart(char *cmd) | |
651 | { | |
652 | machine_ops.restart(cmd); | |
653 | } | |
654 | ||
655 | void machine_halt(void) | |
656 | { | |
657 | machine_ops.halt(); | |
658 | } | |
659 | ||
ed23dc6f GC |
660 | #ifdef CONFIG_KEXEC |
661 | void machine_crash_shutdown(struct pt_regs *regs) | |
662 | { | |
663 | machine_ops.crash_shutdown(regs); | |
664 | } | |
665 | #endif | |
2ddded21 EH |
666 | |
667 | ||
bb8dd270 | 668 | #if defined(CONFIG_SMP) |
2ddded21 EH |
669 | |
670 | /* This keeps a track of which one is crashing cpu. */ | |
671 | static int crashing_cpu; | |
672 | static nmi_shootdown_cb shootdown_callback; | |
673 | ||
674 | static atomic_t waiting_for_crash_ipi; | |
675 | ||
676 | static int crash_nmi_callback(struct notifier_block *self, | |
677 | unsigned long val, void *data) | |
678 | { | |
679 | int cpu; | |
680 | ||
c410b830 | 681 | if (val != DIE_NMI) |
2ddded21 EH |
682 | return NOTIFY_OK; |
683 | ||
684 | cpu = raw_smp_processor_id(); | |
685 | ||
686 | /* Don't do anything if this handler is invoked on crashing cpu. | |
687 | * Otherwise, system will completely hang. Crashing cpu can get | |
688 | * an NMI if system was initially booted with nmi_watchdog parameter. | |
689 | */ | |
690 | if (cpu == crashing_cpu) | |
691 | return NOTIFY_STOP; | |
692 | local_irq_disable(); | |
693 | ||
694 | shootdown_callback(cpu, (struct die_args *)data); | |
695 | ||
696 | atomic_dec(&waiting_for_crash_ipi); | |
697 | /* Assume hlt works */ | |
698 | halt(); | |
699 | for (;;) | |
700 | cpu_relax(); | |
701 | ||
702 | return 1; | |
703 | } | |
704 | ||
705 | static void smp_send_nmi_allbutself(void) | |
706 | { | |
dac5f412 | 707 | apic->send_IPI_allbutself(NMI_VECTOR); |
2ddded21 EH |
708 | } |
709 | ||
710 | static struct notifier_block crash_nmi_nb = { | |
711 | .notifier_call = crash_nmi_callback, | |
166d7514 DZ |
712 | /* we want to be the first one called */ |
713 | .priority = NMI_LOCAL_HIGH_PRIOR+1, | |
2ddded21 EH |
714 | }; |
715 | ||
bb8dd270 EH |
716 | /* Halt all other CPUs, calling the specified function on each of them |
717 | * | |
718 | * This function can be used to halt all other CPUs on crash | |
719 | * or emergency reboot time. The function passed as parameter | |
720 | * will be called inside a NMI handler on all CPUs. | |
721 | */ | |
2ddded21 EH |
722 | void nmi_shootdown_cpus(nmi_shootdown_cb callback) |
723 | { | |
724 | unsigned long msecs; | |
c415b3dc | 725 | local_irq_disable(); |
2ddded21 EH |
726 | |
727 | /* Make a note of crashing cpu. Will be used in NMI callback.*/ | |
728 | crashing_cpu = safe_smp_processor_id(); | |
729 | ||
730 | shootdown_callback = callback; | |
731 | ||
732 | atomic_set(&waiting_for_crash_ipi, num_online_cpus() - 1); | |
733 | /* Would it be better to replace the trap vector here? */ | |
734 | if (register_die_notifier(&crash_nmi_nb)) | |
735 | return; /* return what? */ | |
736 | /* Ensure the new callback function is set before sending | |
737 | * out the NMI | |
738 | */ | |
739 | wmb(); | |
740 | ||
741 | smp_send_nmi_allbutself(); | |
742 | ||
743 | msecs = 1000; /* Wait at most a second for the other cpus to stop */ | |
744 | while ((atomic_read(&waiting_for_crash_ipi) > 0) && msecs) { | |
745 | mdelay(1); | |
746 | msecs--; | |
747 | } | |
748 | ||
749 | /* Leave the nmi callback set */ | |
750 | } | |
bb8dd270 EH |
751 | #else /* !CONFIG_SMP */ |
752 | void nmi_shootdown_cpus(nmi_shootdown_cb callback) | |
753 | { | |
754 | /* No other CPUs to shoot down */ | |
755 | } | |
2ddded21 | 756 | #endif |