Files
system76-edk2/ArmPkg/Library/LinuxBootBootManagerLib/LinuxBootBootManagerLib.inf
Nhi Pham 6254037223 ArmPkg: Implement PlatformBootManagerLib for LinuxBoot
LinuxBoot is a firmware that replaces specific firmware functionality
like the UEFI DXE phase with a Linux kernel and runtime. It is built-in
UEFI image like an application, which is executed at the end of DXE
phase.

To achieve the LinuxBoot boot flow "SEC->PEI->DXE->BDS->LinuxBoot",
today we use the common well-known GUID of UEFI Shell for LinuxBoot
payload, so LinuxBoot developers can effortlessly find the UEFI Shell
Application and replace it with the LinuxBoot payload without
recompiling platform EDK2 (There might be an issue with a few systems
that don't have a UEFI Shell). Also, we have a hard requirement to force
the BDS to boot into the LinuxBoot as it is essentially required that
only the LinuxBoot boot option is permissible and UEFI is an
intermediate bootstrap phase. Considering all the above, it is
reasonable to just have a new GUID for LinuxBoot and require a LinuxBoot
specific BDS implementation. In addition, with making the BDS
implementation simpler, we can reduce many DXE drivers which we think it
is not necessary for LinuxBoot booting.

This patch adds a new PlatformBootManagerLib implementation which
registers only the gArmTokenSpaceGuid.PcdLinuxBootFileGuid for LinuxBoot
payload as an active boot option. It allows BDS to jump to the LinuxBoot
quickly by skipping the UiApp and UEFI Shell.

The PlatformBootManagerLib library derived from
ArmPkg/Library/PlatformBootManagerLib.

Cc: Leif Lindholm <leif@nuviainc.com>
Cc: Ard Biesheuvel <ardb+tianocore@kernel.org>

Signed-off-by: Nhi Pham <nhi@os.amperecomputing.com>
Acked-by: Ard Biesheuvel <ardb@kernel.org>
Acked-by: Samer El-Haj-Mahmoud <Samer.El-Haj-Mahmoud@arm.com>
Acked-by: Moritz Fischer <moritzf@google.com>
2021-10-23 08:38:20 +00:00

59 lines
1.4 KiB
INI

## @file
# Implementation for PlatformBootManagerLib library class interfaces.
#
# Copyright (C) 2015-2016, Red Hat, Inc.
# Copyright (c) 2014, ARM Ltd. All rights reserved.<BR>
# Copyright (c) 2007 - 2014, Intel Corporation. All rights reserved.<BR>
# Copyright (c) 2016, Linaro Ltd. All rights reserved.<BR>
# Copyright (c) 2020 - 2021, Ampere Computing LLC. All rights reserved.<BR>
#
# SPDX-License-Identifier: BSD-2-Clause-Patent
#
##
[Defines]
INF_VERSION = 0x0001001B
BASE_NAME = LinuxBootBootManagerLib
FILE_GUID = 1FA91547-DB23-4F6A-8AF8-3B9782A7F917
MODULE_TYPE = DXE_DRIVER
VERSION_STRING = 1.0
LIBRARY_CLASS = PlatformBootManagerLib|DXE_DRIVER
#
# The following information is for reference only and not required by the build tools.
#
# VALID_ARCHITECTURES = ARM AARCH64
#
[Sources]
LinuxBootBm.c
[Packages]
ArmPkg/ArmPkg.dec
MdeModulePkg/MdeModulePkg.dec
MdePkg/MdePkg.dec
ShellPkg/ShellPkg.dec
[LibraryClasses]
BaseLib
BaseMemoryLib
DebugLib
MemoryAllocationLib
PcdLib
PrintLib
UefiBootManagerLib
UefiBootServicesTableLib
UefiLib
UefiRuntimeServicesTableLib
[Pcd]
gArmTokenSpaceGuid.PcdLinuxBootFileGuid
[Guids]
gEfiEndOfDxeEventGroupGuid
gUefiShellFileGuid
gZeroGuid
[Protocols]
gEfiLoadedImageProtocolGuid