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8562c99c MF |
1 | /* |
2 | * Copyright (C) 2014 Intel Corporation; author Matt Fleming | |
3 | * Copyright (c) 2014 Red Hat, Inc., Mark Salter <msalter@redhat.com> | |
4 | */ | |
5 | #include <linux/efi.h> | |
6 | #include <linux/reboot.h> | |
7 | ||
44be28e9 MF |
8 | int efi_reboot_quirk_mode = -1; |
9 | ||
8562c99c MF |
10 | void efi_reboot(enum reboot_mode reboot_mode, const char *__unused) |
11 | { | |
f0133f3c MF |
12 | const char *str[] = { "cold", "warm", "shutdown", "platform" }; |
13 | int efi_mode, cap_reset_mode; | |
8562c99c MF |
14 | |
15 | if (!efi_enabled(EFI_RUNTIME_SERVICES)) | |
16 | return; | |
17 | ||
18 | switch (reboot_mode) { | |
19 | case REBOOT_WARM: | |
20 | case REBOOT_SOFT: | |
21 | efi_mode = EFI_RESET_WARM; | |
22 | break; | |
23 | default: | |
24 | efi_mode = EFI_RESET_COLD; | |
25 | break; | |
26 | } | |
27 | ||
44be28e9 MF |
28 | /* |
29 | * If a quirk forced an EFI reset mode, always use that. | |
30 | */ | |
31 | if (efi_reboot_quirk_mode != -1) | |
32 | efi_mode = efi_reboot_quirk_mode; | |
33 | ||
f0133f3c MF |
34 | if (efi_capsule_pending(&cap_reset_mode)) { |
35 | if (efi_mode != cap_reset_mode) | |
36 | printk(KERN_CRIT "efi: %s reset requested but pending " | |
37 | "capsule update requires %s reset... Performing " | |
38 | "%s reset.\n", str[efi_mode], str[cap_reset_mode], | |
39 | str[cap_reset_mode]); | |
40 | efi_mode = cap_reset_mode; | |
41 | } | |
42 | ||
8562c99c MF |
43 | efi.reset_system(efi_mode, EFI_SUCCESS, 0, NULL); |
44 | } | |
0c5ed61a MF |
45 | |
46 | bool __weak efi_poweroff_required(void) | |
47 | { | |
48 | return false; | |
49 | } | |
50 | ||
51 | static void efi_power_off(void) | |
52 | { | |
53 | efi.reset_system(EFI_RESET_SHUTDOWN, EFI_SUCCESS, 0, NULL); | |
54 | } | |
55 | ||
56 | static int __init efi_shutdown_init(void) | |
57 | { | |
58 | if (!efi_enabled(EFI_RUNTIME_SERVICES)) | |
59 | return -ENODEV; | |
60 | ||
61 | if (efi_poweroff_required()) | |
62 | pm_power_off = efi_power_off; | |
63 | ||
64 | return 0; | |
65 | } | |
66 | late_initcall(efi_shutdown_init); |