// SPDX-License-Identifier: GPL-2.0 /* * Copyright (C) 2014 Intel Corporation; author Matt Fleming * Copyright (c) 2014 Red Hat, Inc., Mark Salter */ #include #include static void (*orig_pm_power_off)(void); int efi_reboot_quirk_mode = -1; void efi_reboot(enum reboot_mode reboot_mode, const char *__unused) { const char *str[] = { "cold", "warm", "shutdown", "platform" }; int efi_mode, cap_reset_mode; if (!efi_enabled(EFI_RUNTIME_SERVICES)) return; switch (reboot_mode) { case REBOOT_WARM: case REBOOT_SOFT: efi_mode = EFI_RESET_WARM; break; default: efi_mode = EFI_RESET_COLD; break; } /* * If a quirk forced an EFI reset mode, always use that. */ if (efi_reboot_quirk_mode != -1) efi_mode = efi_reboot_quirk_mode; if (efi_capsule_pending(&cap_reset_mode)) { if (efi_mode != cap_reset_mode) printk(KERN_CRIT "efi: %s reset requested but pending " "capsule update requires %s reset... Performing " "%s reset.\n", str[efi_mode], str[cap_reset_mode], str[cap_reset_mode]); efi_mode = cap_reset_mode; } efi.reset_system(efi_mode, EFI_SUCCESS, 0, NULL); } bool __weak efi_poweroff_required(void) { return false; } static void efi_power_off(void) { efi.reset_system(EFI_RESET_SHUTDOWN, EFI_SUCCESS, 0, NULL); /* * The above call should not return, if it does fall back to * the original power off method (typically ACPI poweroff). */ if (orig_pm_power_off) orig_pm_power_off(); } static int __init efi_shutdown_init(void) { if (!efi_enabled(EFI_RUNTIME_SERVICES)) return -ENODEV; if (efi_poweroff_required()) { orig_pm_power_off = pm_power_off; pm_power_off = efi_power_off; } return 0; } late_initcall(efi_shutdown_init);