Commit e688c220 authored by Miao Wang's avatar Miao Wang Committed by Huacai Chen
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LoongArch: Enable general EFI poweroff method 



efi_shutdown_init() can register a general sys_off handler named
efi_power_off(). Enable this by providing efi_poweroff_required(),
like arm and x86. Since EFI poweroff is also supported on LoongArch,
and the enablement makes the poweroff function usable for hardwares
which lack ACPI S5.

We prefer ACPI poweroff rather than EFI poweroff (like x86), so we only
require EFI poweroff if acpi_gbl_reduced_hardware or acpi_no_s5 is true.

Cc: stable@vger.kernel.org
Acked-by: default avatarArd Biesheuvel <ardb@kernel.org>
Signed-off-by: default avatarMiao Wang <shankerwangmiao@gmail.com>
Signed-off-by: default avatarHuacai Chen <chenhuacai@loongson.cn>
parent de9c2c66

arch/loongarch/kernel/efi.c

+6 −0
Original line number Diff line number Diff line
@@ -66,6 +66,12 @@ void __init efi_runtime_init(void) 
	set_bit(EFI_RUNTIME_SERVICES, &efi.flags);

}



bool efi_poweroff_required(void)

{

	return efi_enabled(EFI_RUNTIME_SERVICES) &&

		(acpi_gbl_reduced_hardware || acpi_no_s5);

}



unsigned long __initdata screen_info_table = EFI_INVALID_TABLE_ADDR;



#if defined(CONFIG_SYSFB) || defined(CONFIG_EFI_EARLYCON)