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git.proxmox.com Git - mirror_ubuntu-focal-kernel.git/blob - drivers/firmware/efi/reboot.c
2 * Copyright (C) 2014 Intel Corporation; author Matt Fleming
3 * Copyright (c) 2014 Red Hat, Inc., Mark Salter <msalter@redhat.com>
6 #include <linux/reboot.h>
8 static void (*orig_pm_power_off
)(void);
10 int efi_reboot_quirk_mode
= -1;
12 void efi_reboot(enum reboot_mode reboot_mode
, const char *__unused
)
14 const char *str
[] = { "cold", "warm", "shutdown", "platform" };
15 int efi_mode
, cap_reset_mode
;
17 if (!efi_enabled(EFI_RUNTIME_SERVICES
))
20 switch (reboot_mode
) {
23 efi_mode
= EFI_RESET_WARM
;
26 efi_mode
= EFI_RESET_COLD
;
31 * If a quirk forced an EFI reset mode, always use that.
33 if (efi_reboot_quirk_mode
!= -1)
34 efi_mode
= efi_reboot_quirk_mode
;
36 if (efi_capsule_pending(&cap_reset_mode
)) {
37 if (efi_mode
!= cap_reset_mode
)
38 printk(KERN_CRIT
"efi: %s reset requested but pending "
39 "capsule update requires %s reset... Performing "
40 "%s reset.\n", str
[efi_mode
], str
[cap_reset_mode
],
42 efi_mode
= cap_reset_mode
;
45 efi
.reset_system(efi_mode
, EFI_SUCCESS
, 0, NULL
);
48 bool __weak
efi_poweroff_required(void)
53 static void efi_power_off(void)
55 efi
.reset_system(EFI_RESET_SHUTDOWN
, EFI_SUCCESS
, 0, NULL
);
57 * The above call should not return, if it does fall back to
58 * the original power off method (typically ACPI poweroff).
60 if (orig_pm_power_off
)
64 static int __init
efi_shutdown_init(void)
66 if (!efi_enabled(EFI_RUNTIME_SERVICES
))
69 if (efi_poweroff_required()) {
70 orig_pm_power_off
= pm_power_off
;
71 pm_power_off
= efi_power_off
;
76 late_initcall(efi_shutdown_init
);