Joe Perches | c767a54 | 2012-05-21 19:50:07 -0700 | [diff] [blame] | 1 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| 2 | |
Paul Gortmaker | 186f436 | 2016-07-13 20:18:56 -0400 | [diff] [blame] | 3 | #include <linux/export.h> |
Adrian Bunk | cd6ed52 | 2006-12-06 20:40:06 -0800 | [diff] [blame] | 4 | #include <linux/reboot.h> |
Miguel Boton | 4d022e3 | 2008-01-30 13:32:51 +0100 | [diff] [blame] | 5 | #include <linux/init.h> |
| 6 | #include <linux/pm.h> |
| 7 | #include <linux/efi.h> |
Paul Mackerras | 6c6c51e | 2009-08-03 22:47:32 +1000 | [diff] [blame] | 8 | #include <linux/dmi.h> |
Alexey Dobriyan | d43c36d | 2009-10-07 17:09:06 +0400 | [diff] [blame] | 9 | #include <linux/sched.h> |
Shane Wang | 69575d3 | 2009-09-01 18:25:07 -0700 | [diff] [blame] | 10 | #include <linux/tboot.h> |
Jean Delvare | ca444564 | 2011-03-25 15:20:14 +0100 | [diff] [blame] | 11 | #include <linux/delay.h> |
Miguel Boton | 4d022e3 | 2008-01-30 13:32:51 +0100 | [diff] [blame] | 12 | #include <acpi/reboot.h> |
| 13 | #include <asm/io.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 14 | #include <asm/apic.h> |
Jiang Liu | 8643e28 | 2014-10-27 16:12:04 +0800 | [diff] [blame] | 15 | #include <asm/io_apic.h> |
Zachary Amsden | 4d37e7e | 2005-09-03 15:56:38 -0700 | [diff] [blame] | 16 | #include <asm/desc.h> |
Miguel Boton | 4d022e3 | 2008-01-30 13:32:51 +0100 | [diff] [blame] | 17 | #include <asm/hpet.h> |
Jeremy Fitzhardinge | 68db065 | 2008-03-17 16:37:13 -0700 | [diff] [blame] | 18 | #include <asm/pgtable.h> |
Dmitri Vorobiev | 4412620 | 2008-04-28 03:15:59 +0400 | [diff] [blame] | 19 | #include <asm/proto.h> |
Jeremy Fitzhardinge | 973efae | 2007-05-02 19:27:06 +0200 | [diff] [blame] | 20 | #include <asm/reboot_fixups.h> |
Jeremy Fitzhardinge | 07f3331 | 2007-05-02 19:27:11 +0200 | [diff] [blame] | 21 | #include <asm/reboot.h> |
Jaswinder Singh Rajput | 8248771 | 2008-12-27 18:32:28 +0530 | [diff] [blame] | 22 | #include <asm/pci_x86.h> |
Eduardo Habkost | d176720 | 2008-11-17 19:03:24 -0200 | [diff] [blame] | 23 | #include <asm/virtext.h> |
Jaswinder Singh Rajput | 96b89dc6 | 2009-01-07 21:35:48 +0530 | [diff] [blame] | 24 | #include <asm/cpu.h> |
Don Zickus | c410b83 | 2011-01-06 16:18:50 -0500 | [diff] [blame] | 25 | #include <asm/nmi.h> |
H. Peter Anvin | 6505139 | 2012-06-16 21:47:37 -0700 | [diff] [blame] | 26 | #include <asm/smp.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | |
H. Peter Anvin | 6505139 | 2012-06-16 21:47:37 -0700 | [diff] [blame] | 28 | #include <linux/ctype.h> |
| 29 | #include <linux/mc146818rtc.h> |
| 30 | #include <asm/realmode.h> |
| 31 | #include <asm/x86_init.h> |
Matt Fleming | 44be28e | 2014-06-13 12:39:55 +0100 | [diff] [blame] | 32 | #include <asm/efi.h> |
Miguel Boton | 4d022e3 | 2008-01-30 13:32:51 +0100 | [diff] [blame] | 33 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | /* |
| 35 | * Power off function, if any |
| 36 | */ |
| 37 | void (*pm_power_off)(void); |
Alexey Dobriyan | 129f694 | 2005-06-23 00:08:33 -0700 | [diff] [blame] | 38 | EXPORT_SYMBOL(pm_power_off); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | |
Jan Beulich | ebdd561 | 2008-05-12 15:43:38 +0200 | [diff] [blame] | 40 | static const struct desc_ptr no_idt = {}; |
Miguel Boton | 4d022e3 | 2008-01-30 13:32:51 +0100 | [diff] [blame] | 41 | |
Michael D Labriola | 144d102 | 2012-02-01 10:06:34 -0500 | [diff] [blame] | 42 | /* |
| 43 | * This is set if we need to go through the 'emergency' path. |
Eduardo Habkost | d176720 | 2008-11-17 19:03:24 -0200 | [diff] [blame] | 44 | * When machine_emergency_restart() is called, we may be on |
| 45 | * an inconsistent state and won't be able to do a clean cleanup |
| 46 | */ |
| 47 | static int reboot_emergency; |
| 48 | |
H. Peter Anvin | 14d7ca5 | 2008-11-11 16:19:48 -0800 | [diff] [blame] | 49 | /* This is set by the PCI code if either type 1 or type 2 PCI is detected */ |
| 50 | bool port_cf9_safe = false; |
| 51 | |
Michael D Labriola | 144d102 | 2012-02-01 10:06:34 -0500 | [diff] [blame] | 52 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | * Reboot options and system auto-detection code provided by |
| 54 | * Dell Inc. so their systems "just work". :-) |
| 55 | */ |
| 56 | |
| 57 | /* |
Alex Hung | 4d58125 | 2016-07-14 18:05:56 +0800 | [diff] [blame] | 58 | * Some machines require the "reboot=a" commandline options |
| 59 | */ |
| 60 | static int __init set_acpi_reboot(const struct dmi_system_id *d) |
| 61 | { |
| 62 | if (reboot_type != BOOT_ACPI) { |
| 63 | reboot_type = BOOT_ACPI; |
| 64 | pr_info("%s series board detected. Selecting %s-method for reboots.\n", |
| 65 | d->ident, "ACPI"); |
| 66 | } |
| 67 | return 0; |
| 68 | } |
| 69 | |
| 70 | /* |
Peter Chubb | 1ef0389 | 2011-12-05 16:53:53 +0300 | [diff] [blame] | 71 | * Some machines require the "reboot=b" or "reboot=k" commandline options, |
Miguel Boton | 4d022e3 | 2008-01-30 13:32:51 +0100 | [diff] [blame] | 72 | * this quirk makes that automatic. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | */ |
Jeff Garzik | 1855256 | 2007-10-03 15:15:40 -0400 | [diff] [blame] | 74 | static int __init set_bios_reboot(const struct dmi_system_id *d) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | { |
Miguel Boton | 4d022e3 | 2008-01-30 13:32:51 +0100 | [diff] [blame] | 76 | if (reboot_type != BOOT_BIOS) { |
| 77 | reboot_type = BOOT_BIOS; |
Joe Perches | c767a54 | 2012-05-21 19:50:07 -0700 | [diff] [blame] | 78 | pr_info("%s series board detected. Selecting %s-method for reboots.\n", |
Lan Tianyu | 6d9153b | 2013-10-24 15:11:33 +0800 | [diff] [blame] | 79 | d->ident, "BIOS"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | } |
| 81 | return 0; |
| 82 | } |
| 83 | |
H. Peter Anvin | 6505139 | 2012-06-16 21:47:37 -0700 | [diff] [blame] | 84 | void __noreturn machine_real_restart(unsigned int type) |
Michael D Labriola | 57b1659 | 2012-02-01 10:05:00 -0500 | [diff] [blame] | 85 | { |
Michael D Labriola | 57b1659 | 2012-02-01 10:05:00 -0500 | [diff] [blame] | 86 | local_irq_disable(); |
| 87 | |
Michael D Labriola | 144d102 | 2012-02-01 10:06:34 -0500 | [diff] [blame] | 88 | /* |
| 89 | * Write zero to CMOS register number 0x0f, which the BIOS POST |
| 90 | * routine will recognize as telling it to do a proper reboot. (Well |
| 91 | * that's what this book in front of me says -- it may only apply to |
| 92 | * the Phoenix BIOS though, it's not clear). At the same time, |
| 93 | * disable NMIs by setting the top bit in the CMOS address register, |
| 94 | * as we're about to do peculiar things to the CPU. I'm not sure if |
| 95 | * `outb_p' is needed instead of just `outb'. Use it to be on the |
| 96 | * safe side. (Yes, CMOS_WRITE does outb_p's. - Paul G.) |
Michael D Labriola | 57b1659 | 2012-02-01 10:05:00 -0500 | [diff] [blame] | 97 | */ |
| 98 | spin_lock(&rtc_lock); |
| 99 | CMOS_WRITE(0x00, 0x8f); |
| 100 | spin_unlock(&rtc_lock); |
| 101 | |
| 102 | /* |
| 103 | * Switch back to the initial page table. |
| 104 | */ |
H. Peter Anvin | 6505139 | 2012-06-16 21:47:37 -0700 | [diff] [blame] | 105 | #ifdef CONFIG_X86_32 |
Michael D Labriola | 57b1659 | 2012-02-01 10:05:00 -0500 | [diff] [blame] | 106 | load_cr3(initial_page_table); |
H. Peter Anvin | 6505139 | 2012-06-16 21:47:37 -0700 | [diff] [blame] | 107 | #else |
| 108 | write_cr3(real_mode_header->trampoline_pgd); |
| 109 | #endif |
Michael D Labriola | 57b1659 | 2012-02-01 10:05:00 -0500 | [diff] [blame] | 110 | |
Michael D Labriola | 57b1659 | 2012-02-01 10:05:00 -0500 | [diff] [blame] | 111 | /* Jump to the identity-mapped low memory code */ |
H. Peter Anvin | 6505139 | 2012-06-16 21:47:37 -0700 | [diff] [blame] | 112 | #ifdef CONFIG_X86_32 |
| 113 | asm volatile("jmpl *%0" : : |
| 114 | "rm" (real_mode_header->machine_real_restart_asm), |
| 115 | "a" (type)); |
| 116 | #else |
| 117 | asm volatile("ljmpl *%0" : : |
| 118 | "m" (real_mode_header->machine_real_restart_asm), |
| 119 | "D" (type)); |
| 120 | #endif |
| 121 | unreachable(); |
Michael D Labriola | 57b1659 | 2012-02-01 10:05:00 -0500 | [diff] [blame] | 122 | } |
| 123 | #ifdef CONFIG_APM_MODULE |
| 124 | EXPORT_SYMBOL(machine_real_restart); |
| 125 | #endif |
| 126 | |
Michael D Labriola | 57b1659 | 2012-02-01 10:05:00 -0500 | [diff] [blame] | 127 | /* |
| 128 | * Some Apple MacBook and MacBookPro's needs reboot=p to be able to reboot |
| 129 | */ |
| 130 | static int __init set_pci_reboot(const struct dmi_system_id *d) |
| 131 | { |
Ingo Molnar | 5be44a6 | 2014-04-04 08:41:26 +0200 | [diff] [blame] | 132 | if (reboot_type != BOOT_CF9_FORCE) { |
| 133 | reboot_type = BOOT_CF9_FORCE; |
Joe Perches | c767a54 | 2012-05-21 19:50:07 -0700 | [diff] [blame] | 134 | pr_info("%s series board detected. Selecting %s-method for reboots.\n", |
Lan Tianyu | 6d9153b | 2013-10-24 15:11:33 +0800 | [diff] [blame] | 135 | d->ident, "PCI"); |
Michael D Labriola | 57b1659 | 2012-02-01 10:05:00 -0500 | [diff] [blame] | 136 | } |
| 137 | return 0; |
| 138 | } |
| 139 | |
Peter Chubb | 1ef0389 | 2011-12-05 16:53:53 +0300 | [diff] [blame] | 140 | static int __init set_kbd_reboot(const struct dmi_system_id *d) |
| 141 | { |
| 142 | if (reboot_type != BOOT_KBD) { |
| 143 | reboot_type = BOOT_KBD; |
Joe Perches | c767a54 | 2012-05-21 19:50:07 -0700 | [diff] [blame] | 144 | pr_info("%s series board detected. Selecting %s-method for reboot.\n", |
Lan Tianyu | 6d9153b | 2013-10-24 15:11:33 +0800 | [diff] [blame] | 145 | d->ident, "KBD"); |
Peter Chubb | 1ef0389 | 2011-12-05 16:53:53 +0300 | [diff] [blame] | 146 | } |
| 147 | return 0; |
| 148 | } |
| 149 | |
Michael D Labriola | 144d102 | 2012-02-01 10:06:34 -0500 | [diff] [blame] | 150 | /* |
H. Peter Anvin | 6505139 | 2012-06-16 21:47:37 -0700 | [diff] [blame] | 151 | * This is a single dmi_table handling all reboot quirks. |
Michael D Labriola | 57b1659 | 2012-02-01 10:05:00 -0500 | [diff] [blame] | 152 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 153 | static struct dmi_system_id __initdata reboot_dmi_table[] = { |
Michael D Labriola | 57b1659 | 2012-02-01 10:05:00 -0500 | [diff] [blame] | 154 | |
Dave Jones | e56e57f | 2013-10-01 16:36:55 -0400 | [diff] [blame] | 155 | /* Acer */ |
Michael D Labriola | 144d102 | 2012-02-01 10:06:34 -0500 | [diff] [blame] | 156 | { /* Handle reboot issue on Acer Aspire one */ |
Peter Chubb | 1ef0389 | 2011-12-05 16:53:53 +0300 | [diff] [blame] | 157 | .callback = set_kbd_reboot, |
Peter Chubb | b49c78d | 2011-07-06 10:56:30 +1000 | [diff] [blame] | 158 | .ident = "Acer Aspire One A110", |
| 159 | .matches = { |
| 160 | DMI_MATCH(DMI_SYS_VENDOR, "Acer"), |
| 161 | DMI_MATCH(DMI_PRODUCT_NAME, "AOA110"), |
| 162 | }, |
| 163 | }, |
Dave Jones | e56e57f | 2013-10-01 16:36:55 -0400 | [diff] [blame] | 164 | |
| 165 | /* Apple */ |
Shunichi Fuji | 3e03bbe | 2009-08-11 03:34:40 +0900 | [diff] [blame] | 166 | { /* Handle problems with rebooting on Apple MacBook5 */ |
Paul Mackerras | 6c6c51e | 2009-08-03 22:47:32 +1000 | [diff] [blame] | 167 | .callback = set_pci_reboot, |
Shunichi Fuji | 3e03bbe | 2009-08-11 03:34:40 +0900 | [diff] [blame] | 168 | .ident = "Apple MacBook5", |
Paul Mackerras | 6c6c51e | 2009-08-03 22:47:32 +1000 | [diff] [blame] | 169 | .matches = { |
| 170 | DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), |
Shunichi Fuji | 3e03bbe | 2009-08-11 03:34:40 +0900 | [diff] [blame] | 171 | DMI_MATCH(DMI_PRODUCT_NAME, "MacBook5"), |
Paul Mackerras | 6c6c51e | 2009-08-03 22:47:32 +1000 | [diff] [blame] | 172 | }, |
| 173 | }, |
Shunichi Fuji | 3e03bbe | 2009-08-11 03:34:40 +0900 | [diff] [blame] | 174 | { /* Handle problems with rebooting on Apple MacBookPro5 */ |
Ozan Çağlayan | 498cdbf | 2009-08-04 19:39:31 +0300 | [diff] [blame] | 175 | .callback = set_pci_reboot, |
Shunichi Fuji | 3e03bbe | 2009-08-11 03:34:40 +0900 | [diff] [blame] | 176 | .ident = "Apple MacBookPro5", |
Ozan Çağlayan | 498cdbf | 2009-08-04 19:39:31 +0300 | [diff] [blame] | 177 | .matches = { |
| 178 | DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), |
Shunichi Fuji | 3e03bbe | 2009-08-11 03:34:40 +0900 | [diff] [blame] | 179 | DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro5"), |
Ozan Çağlayan | 498cdbf | 2009-08-04 19:39:31 +0300 | [diff] [blame] | 180 | }, |
| 181 | }, |
Gottfried Haider | 05154752 | 2009-11-02 11:51:11 +0100 | [diff] [blame] | 182 | { /* Handle problems with rebooting on Apple Macmini3,1 */ |
| 183 | .callback = set_pci_reboot, |
| 184 | .ident = "Apple Macmini3,1", |
| 185 | .matches = { |
| 186 | DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), |
| 187 | DMI_MATCH(DMI_PRODUCT_NAME, "Macmini3,1"), |
| 188 | }, |
| 189 | }, |
Justin P. Mattock | 0a83232 | 2010-02-16 15:17:29 -0800 | [diff] [blame] | 190 | { /* Handle problems with rebooting on the iMac9,1. */ |
| 191 | .callback = set_pci_reboot, |
| 192 | .ident = "Apple iMac9,1", |
| 193 | .matches = { |
| 194 | DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), |
| 195 | DMI_MATCH(DMI_PRODUCT_NAME, "iMac9,1"), |
| 196 | }, |
| 197 | }, |
Mario Kleiner | 2f0c0b2 | 2015-12-18 20:24:06 +0100 | [diff] [blame] | 198 | { /* Handle problems with rebooting on the iMac10,1. */ |
| 199 | .callback = set_pci_reboot, |
| 200 | .ident = "Apple iMac10,1", |
| 201 | .matches = { |
| 202 | DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), |
| 203 | DMI_MATCH(DMI_PRODUCT_NAME, "iMac10,1"), |
| 204 | }, |
| 205 | }, |
Dave Jones | e56e57f | 2013-10-01 16:36:55 -0400 | [diff] [blame] | 206 | |
Stefan Lippers-Hollmann | 80313b3 | 2015-03-30 22:44:27 +0200 | [diff] [blame] | 207 | /* ASRock */ |
| 208 | { /* Handle problems with rebooting on ASRock Q1900DC-ITX */ |
| 209 | .callback = set_pci_reboot, |
| 210 | .ident = "ASRock Q1900DC-ITX", |
| 211 | .matches = { |
| 212 | DMI_MATCH(DMI_BOARD_VENDOR, "ASRock"), |
| 213 | DMI_MATCH(DMI_BOARD_NAME, "Q1900DC-ITX"), |
| 214 | }, |
| 215 | }, |
| 216 | |
Dave Jones | e56e57f | 2013-10-01 16:36:55 -0400 | [diff] [blame] | 217 | /* ASUS */ |
| 218 | { /* Handle problems with rebooting on ASUS P4S800 */ |
| 219 | .callback = set_bios_reboot, |
| 220 | .ident = "ASUS P4S800", |
| 221 | .matches = { |
| 222 | DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), |
| 223 | DMI_MATCH(DMI_BOARD_NAME, "P4S800"), |
| 224 | }, |
| 225 | }, |
| 226 | |
Christian Gmeiner | aadca6f | 2014-05-07 09:01:54 +0200 | [diff] [blame] | 227 | /* Certec */ |
| 228 | { /* Handle problems with rebooting on Certec BPC600 */ |
| 229 | .callback = set_pci_reboot, |
| 230 | .ident = "Certec BPC600", |
| 231 | .matches = { |
| 232 | DMI_MATCH(DMI_SYS_VENDOR, "Certec"), |
| 233 | DMI_MATCH(DMI_PRODUCT_NAME, "BPC600"), |
| 234 | }, |
| 235 | }, |
| 236 | |
Dave Jones | e56e57f | 2013-10-01 16:36:55 -0400 | [diff] [blame] | 237 | /* Dell */ |
| 238 | { /* Handle problems with rebooting on Dell DXP061 */ |
| 239 | .callback = set_bios_reboot, |
| 240 | .ident = "Dell DXP061", |
Maxime Ripard | 3628c3f | 2011-06-28 15:57:31 +0200 | [diff] [blame] | 241 | .matches = { |
| 242 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
Dave Jones | e56e57f | 2013-10-01 16:36:55 -0400 | [diff] [blame] | 243 | DMI_MATCH(DMI_PRODUCT_NAME, "Dell DXP061"), |
| 244 | }, |
| 245 | }, |
| 246 | { /* Handle problems with rebooting on Dell E520's */ |
| 247 | .callback = set_bios_reboot, |
| 248 | .ident = "Dell E520", |
| 249 | .matches = { |
| 250 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
| 251 | DMI_MATCH(DMI_PRODUCT_NAME, "Dell DM061"), |
Maxime Ripard | 3628c3f | 2011-06-28 15:57:31 +0200 | [diff] [blame] | 252 | }, |
| 253 | }, |
Ville Syrjälä | 8412da75 | 2013-10-04 15:16:04 +0300 | [diff] [blame] | 254 | { /* Handle problems with rebooting on the Latitude E5410. */ |
| 255 | .callback = set_pci_reboot, |
| 256 | .ident = "Dell Latitude E5410", |
| 257 | .matches = { |
| 258 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
| 259 | DMI_MATCH(DMI_PRODUCT_NAME, "Latitude E5410"), |
| 260 | }, |
| 261 | }, |
Daniel J Blueman | b7798d2 | 2011-05-13 09:04:59 +0800 | [diff] [blame] | 262 | { /* Handle problems with rebooting on the Latitude E5420. */ |
| 263 | .callback = set_pci_reboot, |
| 264 | .ident = "Dell Latitude E5420", |
| 265 | .matches = { |
| 266 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
| 267 | DMI_MATCH(DMI_PRODUCT_NAME, "Latitude E5420"), |
| 268 | }, |
| 269 | }, |
Dave Jones | e56e57f | 2013-10-01 16:36:55 -0400 | [diff] [blame] | 270 | { /* Handle problems with rebooting on the Latitude E6320. */ |
| 271 | .callback = set_pci_reboot, |
| 272 | .ident = "Dell Latitude E6320", |
| 273 | .matches = { |
| 274 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
| 275 | DMI_MATCH(DMI_PRODUCT_NAME, "Latitude E6320"), |
| 276 | }, |
| 277 | }, |
H. Peter Anvin | a536877 | 2011-07-21 11:22:21 -0700 | [diff] [blame] | 278 | { /* Handle problems with rebooting on the Latitude E6420. */ |
| 279 | .callback = set_pci_reboot, |
| 280 | .ident = "Dell Latitude E6420", |
| 281 | .matches = { |
| 282 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
| 283 | DMI_MATCH(DMI_PRODUCT_NAME, "Latitude E6420"), |
| 284 | }, |
| 285 | }, |
Dave Jones | e56e57f | 2013-10-01 16:36:55 -0400 | [diff] [blame] | 286 | { /* Handle problems with rebooting on Dell Optiplex 330 with 0KP561 */ |
| 287 | .callback = set_bios_reboot, |
| 288 | .ident = "Dell OptiPlex 330", |
| 289 | .matches = { |
| 290 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
| 291 | DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 330"), |
| 292 | DMI_MATCH(DMI_BOARD_NAME, "0KP561"), |
| 293 | }, |
| 294 | }, |
| 295 | { /* Handle problems with rebooting on Dell Optiplex 360 with 0T656F */ |
| 296 | .callback = set_bios_reboot, |
| 297 | .ident = "Dell OptiPlex 360", |
| 298 | .matches = { |
| 299 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
| 300 | DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 360"), |
| 301 | DMI_MATCH(DMI_BOARD_NAME, "0T656F"), |
| 302 | }, |
| 303 | }, |
| 304 | { /* Handle problems with rebooting on Dell Optiplex 745's SFF */ |
| 305 | .callback = set_bios_reboot, |
| 306 | .ident = "Dell OptiPlex 745", |
| 307 | .matches = { |
| 308 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
| 309 | DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 745"), |
| 310 | }, |
| 311 | }, |
| 312 | { /* Handle problems with rebooting on Dell Optiplex 745's DFF */ |
| 313 | .callback = set_bios_reboot, |
| 314 | .ident = "Dell OptiPlex 745", |
| 315 | .matches = { |
| 316 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
| 317 | DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 745"), |
| 318 | DMI_MATCH(DMI_BOARD_NAME, "0MM599"), |
| 319 | }, |
| 320 | }, |
| 321 | { /* Handle problems with rebooting on Dell Optiplex 745 with 0KW626 */ |
| 322 | .callback = set_bios_reboot, |
| 323 | .ident = "Dell OptiPlex 745", |
| 324 | .matches = { |
| 325 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
| 326 | DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 745"), |
| 327 | DMI_MATCH(DMI_BOARD_NAME, "0KW626"), |
| 328 | }, |
| 329 | }, |
| 330 | { /* Handle problems with rebooting on Dell OptiPlex 760 with 0G919G */ |
| 331 | .callback = set_bios_reboot, |
| 332 | .ident = "Dell OptiPlex 760", |
| 333 | .matches = { |
| 334 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
| 335 | DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 760"), |
| 336 | DMI_MATCH(DMI_BOARD_NAME, "0G919G"), |
| 337 | }, |
| 338 | }, |
Rafael J. Wysocki | 6be30bb | 2011-11-16 00:19:51 +0100 | [diff] [blame] | 339 | { /* Handle problems with rebooting on the OptiPlex 990. */ |
| 340 | .callback = set_pci_reboot, |
| 341 | .ident = "Dell OptiPlex 990", |
| 342 | .matches = { |
| 343 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
| 344 | DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 990"), |
| 345 | }, |
| 346 | }, |
Dave Jones | e56e57f | 2013-10-01 16:36:55 -0400 | [diff] [blame] | 347 | { /* Handle problems with rebooting on Dell 300's */ |
| 348 | .callback = set_bios_reboot, |
| 349 | .ident = "Dell PowerEdge 300", |
Zhang Rui | 76eb9a3 | 2012-02-20 14:20:06 +0800 | [diff] [blame] | 350 | .matches = { |
Dave Jones | e56e57f | 2013-10-01 16:36:55 -0400 | [diff] [blame] | 351 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"), |
| 352 | DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge 300/"), |
| 353 | }, |
| 354 | }, |
| 355 | { /* Handle problems with rebooting on Dell 1300's */ |
| 356 | .callback = set_bios_reboot, |
| 357 | .ident = "Dell PowerEdge 1300", |
| 358 | .matches = { |
| 359 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"), |
| 360 | DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge 1300/"), |
| 361 | }, |
| 362 | }, |
| 363 | { /* Handle problems with rebooting on Dell 2400's */ |
| 364 | .callback = set_bios_reboot, |
| 365 | .ident = "Dell PowerEdge 2400", |
| 366 | .matches = { |
| 367 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"), |
| 368 | DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge 2400"), |
Zhang Rui | 76eb9a3 | 2012-02-20 14:20:06 +0800 | [diff] [blame] | 369 | }, |
| 370 | }, |
Masoud Sharbiani | 4f0acd3 | 2013-09-20 15:59:07 -0700 | [diff] [blame] | 371 | { /* Handle problems with rebooting on the Dell PowerEdge C6100. */ |
| 372 | .callback = set_pci_reboot, |
| 373 | .ident = "Dell PowerEdge C6100", |
| 374 | .matches = { |
Masoud Sharbiani | 4f0acd3 | 2013-09-20 15:59:07 -0700 | [diff] [blame] | 375 | DMI_MATCH(DMI_SYS_VENDOR, "Dell"), |
| 376 | DMI_MATCH(DMI_PRODUCT_NAME, "C6100"), |
| 377 | }, |
| 378 | }, |
Paul Mackerras | 6c6c51e | 2009-08-03 22:47:32 +1000 | [diff] [blame] | 379 | { /* Handle problems with rebooting on the Precision M6600. */ |
| 380 | .callback = set_pci_reboot, |
| 381 | .ident = "Dell Precision M6600", |
| 382 | .matches = { |
| 383 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
| 384 | DMI_MATCH(DMI_PRODUCT_NAME, "Precision M6600"), |
| 385 | }, |
| 386 | }, |
Dave Jones | e56e57f | 2013-10-01 16:36:55 -0400 | [diff] [blame] | 387 | { /* Handle problems with rebooting on Dell T5400's */ |
| 388 | .callback = set_bios_reboot, |
| 389 | .ident = "Dell Precision T5400", |
Michael D Labriola | 57b1659 | 2012-02-01 10:05:00 -0500 | [diff] [blame] | 390 | .matches = { |
Paul Mackerras | 6c6c51e | 2009-08-03 22:47:32 +1000 | [diff] [blame] | 391 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
Dave Jones | e56e57f | 2013-10-01 16:36:55 -0400 | [diff] [blame] | 392 | DMI_MATCH(DMI_PRODUCT_NAME, "Precision WorkStation T5400"), |
Michael D Labriola | 144d102 | 2012-02-01 10:06:34 -0500 | [diff] [blame] | 393 | }, |
Michael D Labriola | 5955633 | 2012-01-29 14:17:22 -0500 | [diff] [blame] | 394 | }, |
Dave Jones | e56e57f | 2013-10-01 16:36:55 -0400 | [diff] [blame] | 395 | { /* Handle problems with rebooting on Dell T7400's */ |
| 396 | .callback = set_bios_reboot, |
| 397 | .ident = "Dell Precision T7400", |
Paul Mackerras | 6c6c51e | 2009-08-03 22:47:32 +1000 | [diff] [blame] | 398 | .matches = { |
Dave Jones | e56e57f | 2013-10-01 16:36:55 -0400 | [diff] [blame] | 399 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
| 400 | DMI_MATCH(DMI_PRODUCT_NAME, "Precision WorkStation T7400"), |
Paul Mackerras | 6c6c51e | 2009-08-03 22:47:32 +1000 | [diff] [blame] | 401 | }, |
Miguel Boton | 4d022e3 | 2008-01-30 13:32:51 +0100 | [diff] [blame] | 402 | }, |
Dave Jones | e56e57f | 2013-10-01 16:36:55 -0400 | [diff] [blame] | 403 | { /* Handle problems with rebooting on Dell XPS710 */ |
| 404 | .callback = set_bios_reboot, |
| 405 | .ident = "Dell XPS710", |
| 406 | .matches = { |
| 407 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
| 408 | DMI_MATCH(DMI_PRODUCT_NAME, "Dell XPS710"), |
| 409 | }, |
| 410 | }, |
Alex Hung | 4d58125 | 2016-07-14 18:05:56 +0800 | [diff] [blame] | 411 | { /* Handle problems with rebooting on Dell Optiplex 7450 AIO */ |
| 412 | .callback = set_acpi_reboot, |
| 413 | .ident = "Dell OptiPlex 7450 AIO", |
| 414 | .matches = { |
| 415 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
| 416 | DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 7450 AIO"), |
| 417 | }, |
| 418 | }, |
Dave Jones | e56e57f | 2013-10-01 16:36:55 -0400 | [diff] [blame] | 419 | |
| 420 | /* Hewlett-Packard */ |
| 421 | { /* Handle problems with rebooting on HP laptops */ |
| 422 | .callback = set_bios_reboot, |
| 423 | .ident = "HP Compaq Laptop", |
| 424 | .matches = { |
| 425 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), |
| 426 | DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq"), |
| 427 | }, |
| 428 | }, |
| 429 | |
| 430 | /* Sony */ |
| 431 | { /* Handle problems with rebooting on Sony VGN-Z540N */ |
| 432 | .callback = set_bios_reboot, |
| 433 | .ident = "Sony VGN-Z540N", |
| 434 | .matches = { |
| 435 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), |
| 436 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-Z540N"), |
| 437 | }, |
| 438 | }, |
| 439 | |
Miguel Boton | 4d022e3 | 2008-01-30 13:32:51 +0100 | [diff] [blame] | 440 | { } |
| 441 | }; |
Don Zickus | 9c48f1c | 2011-09-30 15:06:21 -0400 | [diff] [blame] | 442 | |
Eduardo Habkost | d176720 | 2008-11-17 19:03:24 -0200 | [diff] [blame] | 443 | static int __init reboot_init(void) |
| 444 | { |
Matt Fleming | 44be28e | 2014-06-13 12:39:55 +0100 | [diff] [blame] | 445 | int rv; |
| 446 | |
Eduardo Habkost | d176720 | 2008-11-17 19:03:24 -0200 | [diff] [blame] | 447 | /* |
| 448 | * Only do the DMI check if reboot_type hasn't been overridden |
| 449 | * on the command line |
| 450 | */ |
Matt Fleming | 44be28e | 2014-06-13 12:39:55 +0100 | [diff] [blame] | 451 | if (!reboot_default) |
| 452 | return 0; |
| 453 | |
| 454 | /* |
| 455 | * The DMI quirks table takes precedence. If no quirks entry |
| 456 | * matches and the ACPI Hardware Reduced bit is set, force EFI |
| 457 | * reboot. |
| 458 | */ |
| 459 | rv = dmi_check_system(reboot_dmi_table); |
| 460 | |
| 461 | if (!rv && efi_reboot_required()) |
| 462 | reboot_type = BOOT_EFI; |
| 463 | |
Eduardo Habkost | d176720 | 2008-11-17 19:03:24 -0200 | [diff] [blame] | 464 | return 0; |
| 465 | } |
| 466 | core_initcall(reboot_init); |
| 467 | |
| 468 | static inline void kb_wait(void) |
| 469 | { |
| 470 | int i; |
| 471 | |
| 472 | for (i = 0; i < 0x10000; i++) { |
Ingo Molnar | 7432d14 | 2008-03-06 18:29:43 +0100 | [diff] [blame] | 473 | if ((inb(0x64) & 0x02) == 0) |
| 474 | break; |
| 475 | udelay(2); |
| 476 | } |
Jody Belka | 416e2d6 | 2008-02-12 23:37:48 +0000 | [diff] [blame] | 477 | } |
Miguel Boton | 4d022e3 | 2008-01-30 13:32:51 +0100 | [diff] [blame] | 478 | |
| 479 | static void vmxoff_nmi(int cpu, struct pt_regs *regs) |
| 480 | { |
Eduardo Habkost | d176720 | 2008-11-17 19:03:24 -0200 | [diff] [blame] | 481 | cpu_emergency_vmxoff(); |
| 482 | } |
| 483 | |
Michael D Labriola | 144d102 | 2012-02-01 10:06:34 -0500 | [diff] [blame] | 484 | /* Use NMIs as IPIs to tell all CPUs to disable virtualization */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 485 | static void emergency_vmx_disable_all(void) |
| 486 | { |
| 487 | /* Just make sure we won't change CPUs while doing this */ |
| 488 | local_irq_disable(); |
Zachary Amsden | 4d37e7e | 2005-09-03 15:56:38 -0700 | [diff] [blame] | 489 | |
Michael D Labriola | 144d102 | 2012-02-01 10:06:34 -0500 | [diff] [blame] | 490 | /* |
| 491 | * We need to disable VMX on all CPUs before rebooting, otherwise |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 492 | * we risk hanging up the machine, because the CPU ignore INIT |
| 493 | * signals when VMX is enabled. |
| 494 | * |
| 495 | * We can't take any locks and we may be on an inconsistent |
| 496 | * state, so we use NMIs as IPIs to tell the other CPUs to disable |
| 497 | * VMX and halt. |
| 498 | * |
| 499 | * For safety, we will avoid running the nmi_shootdown_cpus() |
| 500 | * stuff unnecessarily, but we don't have a way to check |
| 501 | * if other CPUs have VMX enabled. So we will call it only if the |
| 502 | * CPU we are running on has VMX enabled. |
| 503 | * |
| 504 | * We will miss cases where VMX is not enabled on all CPUs. This |
| 505 | * shouldn't do much harm because KVM always enable VMX on all |
| 506 | * CPUs anyway. But we can miss it on the small window where KVM |
| 507 | * is still enabling VMX. |
| 508 | */ |
| 509 | if (cpu_has_vmx() && cpu_vmx_enabled()) { |
Michael D Labriola | 144d102 | 2012-02-01 10:06:34 -0500 | [diff] [blame] | 510 | /* Disable VMX on this CPU. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 511 | cpu_vmxoff(); |
Alexey Dobriyan | 129f694 | 2005-06-23 00:08:33 -0700 | [diff] [blame] | 512 | |
| 513 | /* Halt and disable VMX on the other CPUs */ |
| 514 | nmi_shootdown_cpus(vmxoff_nmi); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 515 | |
Jeremy Fitzhardinge | 07f3331 | 2007-05-02 19:27:11 +0200 | [diff] [blame] | 516 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 517 | } |
Miguel Boton | 4d022e3 | 2008-01-30 13:32:51 +0100 | [diff] [blame] | 518 | |
| 519 | |
| 520 | void __attribute__((weak)) mach_reboot_fixups(void) |
| 521 | { |
| 522 | } |
| 523 | |
Matthew Garrett | 660e34c | 2011-04-04 13:55:05 -0400 | [diff] [blame] | 524 | /* |
Ingo Molnar | 5be44a6 | 2014-04-04 08:41:26 +0200 | [diff] [blame] | 525 | * To the best of our knowledge Windows compatible x86 hardware expects |
| 526 | * the following on reboot: |
Matthew Garrett | 660e34c | 2011-04-04 13:55:05 -0400 | [diff] [blame] | 527 | * |
| 528 | * 1) If the FADT has the ACPI reboot register flag set, try it |
| 529 | * 2) If still alive, write to the keyboard controller |
| 530 | * 3) If still alive, write to the ACPI reboot register again |
| 531 | * 4) If still alive, write to the keyboard controller again |
Li, Aubrey | a4f1987 | 2014-03-02 18:39:02 +0800 | [diff] [blame] | 532 | * 5) If still alive, call the EFI runtime service to reboot |
Ingo Molnar | 5be44a6 | 2014-04-04 08:41:26 +0200 | [diff] [blame] | 533 | * 6) If no EFI runtime service, call the BIOS to do a reboot |
Matthew Garrett | 660e34c | 2011-04-04 13:55:05 -0400 | [diff] [blame] | 534 | * |
Ingo Molnar | 5be44a6 | 2014-04-04 08:41:26 +0200 | [diff] [blame] | 535 | * We default to following the same pattern. We also have |
| 536 | * two other reboot methods: 'triple fault' and 'PCI', which |
| 537 | * can be triggered via the reboot= kernel boot option or |
| 538 | * via quirks. |
| 539 | * |
| 540 | * This means that this function can never return, it can misbehave |
| 541 | * by not rebooting properly and hanging. |
Matthew Garrett | 660e34c | 2011-04-04 13:55:05 -0400 | [diff] [blame] | 542 | */ |
Miguel Boton | 4d022e3 | 2008-01-30 13:32:51 +0100 | [diff] [blame] | 543 | static void native_machine_emergency_restart(void) |
| 544 | { |
| 545 | int i; |
Matthew Garrett | 660e34c | 2011-04-04 13:55:05 -0400 | [diff] [blame] | 546 | int attempt = 0; |
| 547 | int orig_reboot_type = reboot_type; |
Robin Holt | edf2b13 | 2013-07-08 16:01:35 -0700 | [diff] [blame] | 548 | unsigned short mode; |
Miguel Boton | 4d022e3 | 2008-01-30 13:32:51 +0100 | [diff] [blame] | 549 | |
| 550 | if (reboot_emergency) |
| 551 | emergency_vmx_disable_all(); |
| 552 | |
Joseph Cihula | 840c2ba | 2009-06-30 19:31:02 -0700 | [diff] [blame] | 553 | tboot_shutdown(TB_SHUTDOWN_REBOOT); |
| 554 | |
Miguel Boton | 4d022e3 | 2008-01-30 13:32:51 +0100 | [diff] [blame] | 555 | /* Tell the BIOS if we want cold or warm reboot */ |
Robin Holt | edf2b13 | 2013-07-08 16:01:35 -0700 | [diff] [blame] | 556 | mode = reboot_mode == REBOOT_WARM ? 0x1234 : 0; |
| 557 | *((unsigned short *)__va(0x472)) = mode; |
Miguel Boton | 4d022e3 | 2008-01-30 13:32:51 +0100 | [diff] [blame] | 558 | |
Matt Fleming | 87615a3 | 2016-04-25 21:07:00 +0100 | [diff] [blame] | 559 | /* |
| 560 | * If an EFI capsule has been registered with the firmware then |
| 561 | * override the reboot= parameter. |
| 562 | */ |
| 563 | if (efi_capsule_pending(NULL)) { |
| 564 | pr_info("EFI capsule is pending, forcing EFI reboot.\n"); |
| 565 | reboot_type = BOOT_EFI; |
| 566 | } |
| 567 | |
Miguel Boton | 4d022e3 | 2008-01-30 13:32:51 +0100 | [diff] [blame] | 568 | for (;;) { |
| 569 | /* Could also try the reset bit in the Hammer NB */ |
| 570 | switch (reboot_type) { |
Ingo Molnar | 5be44a6 | 2014-04-04 08:41:26 +0200 | [diff] [blame] | 571 | case BOOT_ACPI: |
| 572 | acpi_reboot(); |
| 573 | reboot_type = BOOT_KBD; |
| 574 | break; |
| 575 | |
Miguel Boton | 4d022e3 | 2008-01-30 13:32:51 +0100 | [diff] [blame] | 576 | case BOOT_KBD: |
Michael D Labriola | 144d102 | 2012-02-01 10:06:34 -0500 | [diff] [blame] | 577 | mach_reboot_fixups(); /* For board specific fixups */ |
Ingo Molnar | 7432d14 | 2008-03-06 18:29:43 +0100 | [diff] [blame] | 578 | |
Miguel Boton | 4d022e3 | 2008-01-30 13:32:51 +0100 | [diff] [blame] | 579 | for (i = 0; i < 10; i++) { |
| 580 | kb_wait(); |
| 581 | udelay(50); |
Michael D Labriola | 144d102 | 2012-02-01 10:06:34 -0500 | [diff] [blame] | 582 | outb(0xfe, 0x64); /* Pulse reset low */ |
Miguel Boton | 4d022e3 | 2008-01-30 13:32:51 +0100 | [diff] [blame] | 583 | udelay(50); |
| 584 | } |
Matthew Garrett | 660e34c | 2011-04-04 13:55:05 -0400 | [diff] [blame] | 585 | if (attempt == 0 && orig_reboot_type == BOOT_ACPI) { |
| 586 | attempt = 1; |
| 587 | reboot_type = BOOT_ACPI; |
| 588 | } else { |
Li, Aubrey | a4f1987 | 2014-03-02 18:39:02 +0800 | [diff] [blame] | 589 | reboot_type = BOOT_EFI; |
Matthew Garrett | 660e34c | 2011-04-04 13:55:05 -0400 | [diff] [blame] | 590 | } |
| 591 | break; |
Miguel Boton | 4d022e3 | 2008-01-30 13:32:51 +0100 | [diff] [blame] | 592 | |
Miguel Boton | 4d022e3 | 2008-01-30 13:32:51 +0100 | [diff] [blame] | 593 | case BOOT_EFI: |
Matt Fleming | 8562c99c | 2014-06-13 12:22:22 +0100 | [diff] [blame] | 594 | efi_reboot(reboot_mode, NULL); |
Ingo Molnar | 5be44a6 | 2014-04-04 08:41:26 +0200 | [diff] [blame] | 595 | reboot_type = BOOT_BIOS; |
H. Peter Anvin | 14d7ca5 | 2008-11-11 16:19:48 -0800 | [diff] [blame] | 596 | break; |
Miguel Boton | 4d022e3 | 2008-01-30 13:32:51 +0100 | [diff] [blame] | 597 | |
Ingo Molnar | 5be44a6 | 2014-04-04 08:41:26 +0200 | [diff] [blame] | 598 | case BOOT_BIOS: |
| 599 | machine_real_restart(MRR_BIOS); |
| 600 | |
| 601 | /* We're probably dead after this, but... */ |
| 602 | reboot_type = BOOT_CF9_SAFE; |
| 603 | break; |
| 604 | |
| 605 | case BOOT_CF9_FORCE: |
H. Peter Anvin | 14d7ca5 | 2008-11-11 16:19:48 -0800 | [diff] [blame] | 606 | port_cf9_safe = true; |
Michael D Labriola | 144d102 | 2012-02-01 10:06:34 -0500 | [diff] [blame] | 607 | /* Fall through */ |
H. Peter Anvin | 14d7ca5 | 2008-11-11 16:19:48 -0800 | [diff] [blame] | 608 | |
Ingo Molnar | 5be44a6 | 2014-04-04 08:41:26 +0200 | [diff] [blame] | 609 | case BOOT_CF9_SAFE: |
H. Peter Anvin | 14d7ca5 | 2008-11-11 16:19:48 -0800 | [diff] [blame] | 610 | if (port_cf9_safe) { |
Ingo Molnar | 5be44a6 | 2014-04-04 08:41:26 +0200 | [diff] [blame] | 611 | u8 reboot_code = reboot_mode == REBOOT_WARM ? 0x06 : 0x0E; |
Li Fei | 16c21ae | 2013-08-21 16:13:57 +0800 | [diff] [blame] | 612 | u8 cf9 = inb(0xcf9) & ~reboot_code; |
H. Peter Anvin | 14d7ca5 | 2008-11-11 16:19:48 -0800 | [diff] [blame] | 613 | outb(cf9|2, 0xcf9); /* Request hard reset */ |
| 614 | udelay(50); |
Li Fei | 16c21ae | 2013-08-21 16:13:57 +0800 | [diff] [blame] | 615 | /* Actually do the reset */ |
| 616 | outb(cf9|reboot_code, 0xcf9); |
H. Peter Anvin | 14d7ca5 | 2008-11-11 16:19:48 -0800 | [diff] [blame] | 617 | udelay(50); |
| 618 | } |
Ingo Molnar | 5be44a6 | 2014-04-04 08:41:26 +0200 | [diff] [blame] | 619 | reboot_type = BOOT_TRIPLE; |
| 620 | break; |
| 621 | |
| 622 | case BOOT_TRIPLE: |
| 623 | load_idt(&no_idt); |
| 624 | __asm__ __volatile__("int3"); |
| 625 | |
| 626 | /* We're probably dead after this, but... */ |
| 627 | reboot_type = BOOT_KBD; |
Miguel Boton | 4d022e3 | 2008-01-30 13:32:51 +0100 | [diff] [blame] | 628 | break; |
| 629 | } |
| 630 | } |
| 631 | } |
| 632 | |
Glauber Costa | 3c62c62 | 2008-03-17 16:08:39 -0300 | [diff] [blame] | 633 | void native_machine_shutdown(void) |
Miguel Boton | 4d022e3 | 2008-01-30 13:32:51 +0100 | [diff] [blame] | 634 | { |
| 635 | /* Stop the cpus and apics */ |
Fenghua Yu | 522e664 | 2013-10-23 18:30:12 -0700 | [diff] [blame] | 636 | #ifdef CONFIG_X86_IO_APIC |
Fenghua Yu | 2885432 | 2013-12-04 16:07:49 -0800 | [diff] [blame] | 637 | /* |
| 638 | * Disabling IO APIC before local APIC is a workaround for |
| 639 | * erratum AVR31 in "Intel Atom Processor C2000 Product Family |
| 640 | * Specification Update". In this situation, interrupts that target |
| 641 | * a Logical Processor whose Local APIC is either in the process of |
| 642 | * being hardware disabled or software disabled are neither delivered |
| 643 | * nor discarded. When this erratum occurs, the processor may hang. |
| 644 | * |
| 645 | * Even without the erratum, it still makes sense to quiet IO APIC |
| 646 | * before disabling Local APIC. |
| 647 | */ |
Fenghua Yu | 522e664 | 2013-10-23 18:30:12 -0700 | [diff] [blame] | 648 | disable_IO_APIC(); |
| 649 | #endif |
| 650 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 651 | #ifdef CONFIG_SMP |
Michael D Labriola | 144d102 | 2012-02-01 10:06:34 -0500 | [diff] [blame] | 652 | /* |
Robin Holt | 1b3a5d0 | 2013-07-08 16:01:42 -0700 | [diff] [blame] | 653 | * Stop all of the others. Also disable the local irq to |
| 654 | * not receive the per-cpu timer interrupt which may trigger |
| 655 | * scheduler's load balance. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 656 | */ |
Feng Tang | 55c844a | 2012-05-30 23:15:41 +0800 | [diff] [blame] | 657 | local_irq_disable(); |
Alok Kataria | 76fac07 | 2010-10-11 14:37:08 -0700 | [diff] [blame] | 658 | stop_other_cpus(); |
Miguel Boton | 4d022e3 | 2008-01-30 13:32:51 +0100 | [diff] [blame] | 659 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 660 | |
| 661 | lapic_shutdown(); |
| 662 | |
OGAWA Hirofumi | c86c7fb | 2007-12-03 17:17:10 +0100 | [diff] [blame] | 663 | #ifdef CONFIG_HPET_TIMER |
| 664 | hpet_disable(); |
| 665 | #endif |
Miguel Boton | 4d022e3 | 2008-01-30 13:32:51 +0100 | [diff] [blame] | 666 | |
| 667 | #ifdef CONFIG_X86_64 |
FUJITA Tomonori | 338bac5 | 2009-10-27 16:34:44 +0900 | [diff] [blame] | 668 | x86_platform.iommu_shutdown(); |
Miguel Boton | 4d022e3 | 2008-01-30 13:32:51 +0100 | [diff] [blame] | 669 | #endif |
Eric W. Biederman | dd2a130 | 2005-06-25 14:57:55 -0700 | [diff] [blame] | 670 | } |
| 671 | |
Eduardo Habkost | d176720 | 2008-11-17 19:03:24 -0200 | [diff] [blame] | 672 | static void __machine_emergency_restart(int emergency) |
| 673 | { |
| 674 | reboot_emergency = emergency; |
| 675 | machine_ops.emergency_restart(); |
| 676 | } |
| 677 | |
Jody Belka | 416e2d6 | 2008-02-12 23:37:48 +0000 | [diff] [blame] | 678 | static void native_machine_restart(char *__unused) |
Jeremy Fitzhardinge | 973efae | 2007-05-02 19:27:06 +0200 | [diff] [blame] | 679 | { |
Joe Perches | c767a54 | 2012-05-21 19:50:07 -0700 | [diff] [blame] | 680 | pr_notice("machine restart\n"); |
Jeremy Fitzhardinge | 973efae | 2007-05-02 19:27:06 +0200 | [diff] [blame] | 681 | |
Miguel Boton | 4d022e3 | 2008-01-30 13:32:51 +0100 | [diff] [blame] | 682 | if (!reboot_force) |
Eric W. Biederman | 6e3fbee | 2006-01-11 22:43:12 +0100 | [diff] [blame] | 683 | machine_shutdown(); |
Eduardo Habkost | d176720 | 2008-11-17 19:03:24 -0200 | [diff] [blame] | 684 | __machine_emergency_restart(0); |
Jeremy Fitzhardinge | 07f3331 | 2007-05-02 19:27:11 +0200 | [diff] [blame] | 685 | } |
| 686 | |
Jody Belka | 416e2d6 | 2008-02-12 23:37:48 +0000 | [diff] [blame] | 687 | static void native_machine_halt(void) |
Jeremy Fitzhardinge | 07f3331 | 2007-05-02 19:27:11 +0200 | [diff] [blame] | 688 | { |
Michael D Labriola | 144d102 | 2012-02-01 10:06:34 -0500 | [diff] [blame] | 689 | /* Stop other cpus and apics */ |
Ivan Vecera | d3ec5ca | 2008-11-11 14:33:44 +0100 | [diff] [blame] | 690 | machine_shutdown(); |
| 691 | |
Joseph Cihula | 840c2ba | 2009-06-30 19:31:02 -0700 | [diff] [blame] | 692 | tboot_shutdown(TB_SHUTDOWN_HALT); |
| 693 | |
Ivan Vecera | d3ec5ca | 2008-11-11 14:33:44 +0100 | [diff] [blame] | 694 | stop_this_cpu(NULL); |
Jeremy Fitzhardinge | 07f3331 | 2007-05-02 19:27:11 +0200 | [diff] [blame] | 695 | } |
Miguel Boton | 4d022e3 | 2008-01-30 13:32:51 +0100 | [diff] [blame] | 696 | |
Jody Belka | 416e2d6 | 2008-02-12 23:37:48 +0000 | [diff] [blame] | 697 | static void native_machine_power_off(void) |
Miguel Boton | 4d022e3 | 2008-01-30 13:32:51 +0100 | [diff] [blame] | 698 | { |
| 699 | if (pm_power_off) { |
| 700 | if (!reboot_force) |
| 701 | machine_shutdown(); |
| 702 | pm_power_off(); |
| 703 | } |
Michael D Labriola | 144d102 | 2012-02-01 10:06:34 -0500 | [diff] [blame] | 704 | /* A fallback in case there is no PM info available */ |
Joseph Cihula | 840c2ba | 2009-06-30 19:31:02 -0700 | [diff] [blame] | 705 | tboot_shutdown(TB_SHUTDOWN_HALT); |
Miguel Boton | 4d022e3 | 2008-01-30 13:32:51 +0100 | [diff] [blame] | 706 | } |
| 707 | |
| 708 | struct machine_ops machine_ops = { |
Jody Belka | 416e2d6 | 2008-02-12 23:37:48 +0000 | [diff] [blame] | 709 | .power_off = native_machine_power_off, |
| 710 | .shutdown = native_machine_shutdown, |
| 711 | .emergency_restart = native_machine_emergency_restart, |
| 712 | .restart = native_machine_restart, |
Glauber Costa | ed23dc6 | 2008-03-17 16:08:38 -0300 | [diff] [blame] | 713 | .halt = native_machine_halt, |
Dave Young | 2965faa | 2015-09-09 15:38:55 -0700 | [diff] [blame] | 714 | #ifdef CONFIG_KEXEC_CORE |
Glauber Costa | ed23dc6 | 2008-03-17 16:08:38 -0300 | [diff] [blame] | 715 | .crash_shutdown = native_machine_crash_shutdown, |
| 716 | #endif |
Miguel Boton | 4d022e3 | 2008-01-30 13:32:51 +0100 | [diff] [blame] | 717 | }; |
Jody Belka | 416e2d6 | 2008-02-12 23:37:48 +0000 | [diff] [blame] | 718 | |
| 719 | void machine_power_off(void) |
| 720 | { |
| 721 | machine_ops.power_off(); |
| 722 | } |
| 723 | |
| 724 | void machine_shutdown(void) |
| 725 | { |
| 726 | machine_ops.shutdown(); |
| 727 | } |
| 728 | |
| 729 | void machine_emergency_restart(void) |
| 730 | { |
Eduardo Habkost | d176720 | 2008-11-17 19:03:24 -0200 | [diff] [blame] | 731 | __machine_emergency_restart(1); |
Jody Belka | 416e2d6 | 2008-02-12 23:37:48 +0000 | [diff] [blame] | 732 | } |
| 733 | |
| 734 | void machine_restart(char *cmd) |
| 735 | { |
| 736 | machine_ops.restart(cmd); |
| 737 | } |
| 738 | |
| 739 | void machine_halt(void) |
| 740 | { |
| 741 | machine_ops.halt(); |
| 742 | } |
| 743 | |
Dave Young | 2965faa | 2015-09-09 15:38:55 -0700 | [diff] [blame] | 744 | #ifdef CONFIG_KEXEC_CORE |
Glauber Costa | ed23dc6 | 2008-03-17 16:08:38 -0300 | [diff] [blame] | 745 | void machine_crash_shutdown(struct pt_regs *regs) |
| 746 | { |
| 747 | machine_ops.crash_shutdown(regs); |
| 748 | } |
| 749 | #endif |
Eduardo Habkost | 2ddded2 | 2008-11-12 11:34:42 -0200 | [diff] [blame] | 750 | |
| 751 | |
Eduardo Habkost | bb8dd27 | 2008-11-12 11:34:43 -0200 | [diff] [blame] | 752 | #if defined(CONFIG_SMP) |
Eduardo Habkost | 2ddded2 | 2008-11-12 11:34:42 -0200 | [diff] [blame] | 753 | |
| 754 | /* This keeps a track of which one is crashing cpu. */ |
| 755 | static int crashing_cpu; |
| 756 | static nmi_shootdown_cb shootdown_callback; |
| 757 | |
| 758 | static atomic_t waiting_for_crash_ipi; |
Hidehiro Kawai | 58c5661 | 2015-12-14 11:19:10 +0100 | [diff] [blame] | 759 | static int crash_ipi_issued; |
Eduardo Habkost | 2ddded2 | 2008-11-12 11:34:42 -0200 | [diff] [blame] | 760 | |
Don Zickus | 9c48f1c | 2011-09-30 15:06:21 -0400 | [diff] [blame] | 761 | static int crash_nmi_callback(unsigned int val, struct pt_regs *regs) |
Eduardo Habkost | 2ddded2 | 2008-11-12 11:34:42 -0200 | [diff] [blame] | 762 | { |
| 763 | int cpu; |
| 764 | |
Eduardo Habkost | 2ddded2 | 2008-11-12 11:34:42 -0200 | [diff] [blame] | 765 | cpu = raw_smp_processor_id(); |
| 766 | |
Michael D Labriola | 144d102 | 2012-02-01 10:06:34 -0500 | [diff] [blame] | 767 | /* |
| 768 | * Don't do anything if this handler is invoked on crashing cpu. |
Eduardo Habkost | 2ddded2 | 2008-11-12 11:34:42 -0200 | [diff] [blame] | 769 | * Otherwise, system will completely hang. Crashing cpu can get |
| 770 | * an NMI if system was initially booted with nmi_watchdog parameter. |
| 771 | */ |
| 772 | if (cpu == crashing_cpu) |
Don Zickus | 9c48f1c | 2011-09-30 15:06:21 -0400 | [diff] [blame] | 773 | return NMI_HANDLED; |
Eduardo Habkost | 2ddded2 | 2008-11-12 11:34:42 -0200 | [diff] [blame] | 774 | local_irq_disable(); |
| 775 | |
Don Zickus | 9c48f1c | 2011-09-30 15:06:21 -0400 | [diff] [blame] | 776 | shootdown_callback(cpu, regs); |
Eduardo Habkost | 2ddded2 | 2008-11-12 11:34:42 -0200 | [diff] [blame] | 777 | |
| 778 | atomic_dec(&waiting_for_crash_ipi); |
| 779 | /* Assume hlt works */ |
| 780 | halt(); |
| 781 | for (;;) |
| 782 | cpu_relax(); |
| 783 | |
Don Zickus | 9c48f1c | 2011-09-30 15:06:21 -0400 | [diff] [blame] | 784 | return NMI_HANDLED; |
Eduardo Habkost | 2ddded2 | 2008-11-12 11:34:42 -0200 | [diff] [blame] | 785 | } |
| 786 | |
| 787 | static void smp_send_nmi_allbutself(void) |
| 788 | { |
Ingo Molnar | dac5f41 | 2009-01-28 15:42:24 +0100 | [diff] [blame] | 789 | apic->send_IPI_allbutself(NMI_VECTOR); |
Eduardo Habkost | 2ddded2 | 2008-11-12 11:34:42 -0200 | [diff] [blame] | 790 | } |
| 791 | |
Michael D Labriola | 144d102 | 2012-02-01 10:06:34 -0500 | [diff] [blame] | 792 | /* |
| 793 | * Halt all other CPUs, calling the specified function on each of them |
Eduardo Habkost | bb8dd27 | 2008-11-12 11:34:43 -0200 | [diff] [blame] | 794 | * |
| 795 | * This function can be used to halt all other CPUs on crash |
| 796 | * or emergency reboot time. The function passed as parameter |
| 797 | * will be called inside a NMI handler on all CPUs. |
| 798 | */ |
Eduardo Habkost | 2ddded2 | 2008-11-12 11:34:42 -0200 | [diff] [blame] | 799 | void nmi_shootdown_cpus(nmi_shootdown_cb callback) |
| 800 | { |
| 801 | unsigned long msecs; |
Eduardo Habkost | c415b3d | 2008-11-12 11:34:44 -0200 | [diff] [blame] | 802 | local_irq_disable(); |
Eduardo Habkost | 2ddded2 | 2008-11-12 11:34:42 -0200 | [diff] [blame] | 803 | |
Michael D Labriola | 144d102 | 2012-02-01 10:06:34 -0500 | [diff] [blame] | 804 | /* Make a note of crashing cpu. Will be used in NMI callback. */ |
Eduardo Habkost | 2ddded2 | 2008-11-12 11:34:42 -0200 | [diff] [blame] | 805 | crashing_cpu = safe_smp_processor_id(); |
| 806 | |
| 807 | shootdown_callback = callback; |
| 808 | |
| 809 | atomic_set(&waiting_for_crash_ipi, num_online_cpus() - 1); |
| 810 | /* Would it be better to replace the trap vector here? */ |
Don Zickus | 9c48f1c | 2011-09-30 15:06:21 -0400 | [diff] [blame] | 811 | if (register_nmi_handler(NMI_LOCAL, crash_nmi_callback, |
| 812 | NMI_FLAG_FIRST, "crash")) |
Michael D Labriola | 144d102 | 2012-02-01 10:06:34 -0500 | [diff] [blame] | 813 | return; /* Return what? */ |
| 814 | /* |
| 815 | * Ensure the new callback function is set before sending |
Eduardo Habkost | 2ddded2 | 2008-11-12 11:34:42 -0200 | [diff] [blame] | 816 | * out the NMI |
| 817 | */ |
| 818 | wmb(); |
| 819 | |
| 820 | smp_send_nmi_allbutself(); |
| 821 | |
Hidehiro Kawai | 58c5661 | 2015-12-14 11:19:10 +0100 | [diff] [blame] | 822 | /* Kick CPUs looping in NMI context. */ |
| 823 | WRITE_ONCE(crash_ipi_issued, 1); |
| 824 | |
Eduardo Habkost | 2ddded2 | 2008-11-12 11:34:42 -0200 | [diff] [blame] | 825 | msecs = 1000; /* Wait at most a second for the other cpus to stop */ |
| 826 | while ((atomic_read(&waiting_for_crash_ipi) > 0) && msecs) { |
| 827 | mdelay(1); |
| 828 | msecs--; |
| 829 | } |
| 830 | |
| 831 | /* Leave the nmi callback set */ |
| 832 | } |
Hidehiro Kawai | 58c5661 | 2015-12-14 11:19:10 +0100 | [diff] [blame] | 833 | |
Hidehiro Kawai | b279d67 | 2015-12-14 11:19:13 +0100 | [diff] [blame] | 834 | /* |
| 835 | * Check if the crash dumping IPI got issued and if so, call its callback |
| 836 | * directly. This function is used when we have already been in NMI handler. |
| 837 | * It doesn't return. |
| 838 | */ |
| 839 | void run_crash_ipi_callback(struct pt_regs *regs) |
| 840 | { |
| 841 | if (crash_ipi_issued) |
| 842 | crash_nmi_callback(0, regs); |
| 843 | } |
| 844 | |
Hidehiro Kawai | 58c5661 | 2015-12-14 11:19:10 +0100 | [diff] [blame] | 845 | /* Override the weak function in kernel/panic.c */ |
| 846 | void nmi_panic_self_stop(struct pt_regs *regs) |
| 847 | { |
| 848 | while (1) { |
Hidehiro Kawai | b279d67 | 2015-12-14 11:19:13 +0100 | [diff] [blame] | 849 | /* If no CPU is preparing crash dump, we simply loop here. */ |
| 850 | run_crash_ipi_callback(regs); |
Hidehiro Kawai | 58c5661 | 2015-12-14 11:19:10 +0100 | [diff] [blame] | 851 | cpu_relax(); |
| 852 | } |
| 853 | } |
| 854 | |
Eduardo Habkost | bb8dd27 | 2008-11-12 11:34:43 -0200 | [diff] [blame] | 855 | #else /* !CONFIG_SMP */ |
| 856 | void nmi_shootdown_cpus(nmi_shootdown_cb callback) |
| 857 | { |
| 858 | /* No other CPUs to shoot down */ |
| 859 | } |
Hidehiro Kawai | b279d67 | 2015-12-14 11:19:13 +0100 | [diff] [blame] | 860 | |
| 861 | void run_crash_ipi_callback(struct pt_regs *regs) |
| 862 | { |
| 863 | } |
Eduardo Habkost | 2ddded2 | 2008-11-12 11:34:42 -0200 | [diff] [blame] | 864 | #endif |