audk/ArmPkg/ArmPkg.dec

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#/** @file
# ARM processor package.
#
# Copyright (c) 2009 - 2010, Apple Inc. All rights reserved.<BR>
# Copyright (c) 2011 - 2023, ARM Limited. All rights reserved.
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 09:32:41 +02:00
# Copyright (c) 2021, Ampere Computing LLC. All rights reserved.
#
# SPDX-License-Identifier: BSD-2-Clause-Patent
#
#**/
[Defines]
DEC_SPECIFICATION = 0x00010005
PACKAGE_NAME = ArmPkg
PACKAGE_GUID = 5CFBD99E-3C43-4E7F-8054-9CDEAFF7710F
PACKAGE_VERSION = 0.1
################################################################################
#
# Include Section - list of Include Paths that are provided by this package.
# Comments are used for Keywords and Module Types.
#
# Supported Module Types:
# BASE SEC PEI_CORE PEIM DXE_CORE DXE_DRIVER DXE_RUNTIME_DRIVER DXE_SMM_DRIVER DXE_SAL_DRIVER UEFI_DRIVER UEFI_APPLICATION
#
################################################################################
[Includes.common]
Include # Root include for the package
[LibraryClasses.common]
## @libraryclass Convert Arm instructions to a human readable format.
#
ArmDisassemblerLib|Include/Library/ArmDisassemblerLib.h
## @libraryclass Provides an interface to Arm generic counters.
#
ArmGenericTimerCounterLib|Include/Library/ArmGenericTimerCounterLib.h
## @libraryclass Provides an interface to initialize a
# Generic Interrupt Controller (GIC).
#
ArmGicArchLib|Include/Library/ArmGicArchLib.h
## @libraryclass Provides a Generic Interrupt Controller (GIC)
# configuration interface.
#
ArmGicLib|Include/Library/ArmGicLib.h
## @libraryclass Provides a HyperVisor Call (HVC) interface.
#
ArmHvcLib|Include/Library/ArmHvcLib.h
## @libraryclass Provides an interface to Arm registers.
#
ArmLib|Include/Library/ArmLib.h
## @libraryclass Provides a Mmu interface.
#
ArmMmuLib|Include/Library/ArmMmuLib.h
## @libraryclass Provides a Mailbox Transport Layer (MTL) interface
# for the System Control and Management Interface (SCMI).
#
ArmMtlLib|Include/Library/ArmMtlLib.h
## @libraryclass Provides a System Monitor Call (SMC) interface.
#
ArmSmcLib|Include/Library/ArmSmcLib.h
## @libraryclass Provides a SuperVisor Call (SVC) interface.
#
ArmSvcLib|Include/Library/ArmSvcLib.h
## @libraryclass Provides a Monitor Call interface that will use the
# default conduit (HVC or SMC).
#
ArmMonitorLib|Include/Library/ArmMonitorLib.h
## @libraryclass Provides a default exception handler.
#
DefaultExceptionHandlerLib|Include/Library/DefaultExceptionHandlerLib.h
## @libraryclass Provides an interface to query miscellaneous OEM
# information.
#
OemMiscLib|Include/Library/OemMiscLib.h
## @libraryclass Provides an OpTee interface.
#
OpteeLib|Include/Library/OpteeLib.h
## @libraryclass Provides a semihosting interface.
#
SemihostLib|Include/Library/SemihostLib.h
## @libraryclass Provides an interface for a StandaloneMm Mmu.
#
StandaloneMmMmuLib|Include/Library/StandaloneMmMmuLib.h
[Guids.common]
gArmTokenSpaceGuid = { 0xBB11ECFE, 0x820F, 0x4968, { 0xBB, 0xA6, 0xF7, 0x6A, 0xFE, 0x30, 0x25, 0x96 } }
## ARM MPCore table
# Include/Guid/ArmMpCoreInfo.h
gArmMpCoreInfoGuid = { 0xa4ee0728, 0xe5d7, 0x4ac5, {0xb2, 0x1e, 0x65, 0x8e, 0xd8, 0x57, 0xe8, 0x34} }
gArmMmuReplaceLiveTranslationEntryFuncGuid = { 0xa8b50ff3, 0x08ec, 0x4dd3, {0xbf, 0x04, 0x28, 0xbf, 0x71, 0x75, 0xc7, 0x4a} }
[Protocols.common]
## Arm System Control and Management Interface(SCMI) Base protocol
## ArmPkg/Include/Protocol/ArmScmiBaseProtocol.h
gArmScmiBaseProtocolGuid = { 0xd7e5abe9, 0x33ab, 0x418e, { 0x9f, 0x91, 0x72, 0xda, 0xe2, 0xba, 0x8e, 0x2f } }
## Arm System Control and Management Interface(SCMI) Clock management protocol
## ArmPkg/Include/Protocol/ArmScmiClockProtocol.h
gArmScmiClockProtocolGuid = { 0x91ce67a8, 0xe0aa, 0x4012, { 0xb9, 0x9f, 0xb6, 0xfc, 0xf3, 0x4, 0x8e, 0xaa } }
gArmScmiClock2ProtocolGuid = { 0xb8d8caf2, 0x9e94, 0x462c, { 0xa8, 0x34, 0x6c, 0x99, 0xfc, 0x05, 0xef, 0xcf } }
## Arm System Control and Management Interface(SCMI) Clock management protocol
## ArmPkg/Include/Protocol/ArmScmiPerformanceProtocol.h
gArmScmiPerformanceProtocolGuid = { 0x9b8ba84, 0x3dd3, 0x49a6, { 0xa0, 0x5a, 0x31, 0x34, 0xa5, 0xf0, 0x7b, 0xad } }
[Ppis]
## Include/Ppi/ArmMpCoreInfo.h
gArmMpCoreInfoPpiGuid = { 0x6847cc74, 0xe9ec, 0x4f8f, {0xa2, 0x9d, 0xab, 0x44, 0xe7, 0x54, 0xa8, 0xfc} }
[PcdsFeatureFlag.common]
gArmTokenSpaceGuid.PcdCpuDxeProduceDebugSupport|FALSE|BOOLEAN|0x00000001
# On ARM Architecture with the Security Extension, the address for the
# Vector Table can be mapped anywhere in the memory map. It means we can
# point the Exception Vector Table to its location in CpuDxe.
# By default we copy the Vector Table at PcdGet64(PcdCpuVectorBaseAddress)
gArmTokenSpaceGuid.PcdRelocateVectorTable|TRUE|BOOLEAN|0x00000022
# Set this PCD to TRUE if the Exception Vector is changed to add debugger support before
# it has been configured by the CPU DXE
gArmTokenSpaceGuid.PcdDebuggerExceptionSupport|FALSE|BOOLEAN|0x00000032
# Define if the GICv3 controller should use the GICv2 legacy
gArmTokenSpaceGuid.PcdArmGicV3WithV2Legacy|FALSE|BOOLEAN|0x00000042
## Define the conduit to use for monitor calls.
# Default PcdMonitorConduitHvc = FALSE, conduit = SMC
# If PcdMonitorConduitHvc = TRUE, conduit = HVC
gArmTokenSpaceGuid.PcdMonitorConduitHvc|FALSE|BOOLEAN|0x00000047
ArmPkg/CpuDxe: Perform preliminary NX remap of free memory The DXE core implementation of PcdDxeNxMemoryProtectionPolicy already contains an assertion that EfiConventionalMemory and EfiBootServicesData are subjected to the same policy when it comes to the use of NX permissions. The reason for this is that we may otherwise end up with unbounded recursion in the page table code, given that allocating a page table would then involve a permission attribute change, and this could result in the need for a block entry to be split, which would trigger the allocation of a page table recursively. For the same reason, a shortcut exists in ApplyMemoryProtectionPolicy() where, instead of setting the memory attributes unconditionally, we compare the NX policies and avoid touching the page tables if they are the same for the old and the new memory types. Without this shortcut, we may end up in a situation where, as the CPU arch protocol DXE driver is ramping up, the same unbounded recursion is triggered, due to the fact that the NX policy for EfiConventionalMemory has not been applied yet. To break this cycle, let's remap all EfiConventionalMemory regions according to the NX policy for EfiBootServicesData before exposing the CPU arch protocol to the DXE core and other drivers. This ensures that creating EfiBootServicesData allocations does not result in memory attribute changes, and therefore no recursion. Signed-off-by: Ard Biesheuvel <ardb@kernel.org> Reviewed-by: Leif Lindholm <quic_llindhol@quicinc.com>
2023-02-08 16:34:33 +01:00
# Whether to remap all unused memory NX before installing the CPU arch
# protocol driver. This is needed on platforms that map all DRAM with RWX
# attributes initially, and can be disabled otherwise.
gArmTokenSpaceGuid.PcdRemapUnusedMemoryNx|TRUE|BOOLEAN|0x00000048
[PcdsFeatureFlag.ARM]
# Whether to map normal memory as non-shareable. FALSE is the safe choice, but
# TRUE may be appropriate to fix performance problems if you don't care about
# hardware coherency (i.e., no virtualization or cache coherent DMA)
gArmTokenSpaceGuid.PcdNormalMemoryNonshareableOverride|FALSE|BOOLEAN|0x00000043
[PcdsFeatureFlag.AARCH64, PcdsFeatureFlag.ARM]
## Used to select method for requesting services from S-EL1.<BR><BR>
# TRUE - Selects FF-A calls for communication between S-EL0 and SPMC.<BR>
# FALSE - Selects SVC calls for communication between S-EL0 and SPMC.<BR>
# @Prompt Enable FF-A support.
gArmTokenSpaceGuid.PcdFfaEnable|FALSE|BOOLEAN|0x0000005B
[PcdsFixedAtBuild.common]
gArmTokenSpaceGuid.PcdTrustzoneSupport|FALSE|BOOLEAN|0x00000006
# This PCD should be a FeaturePcd. But we used this PCD as an '#if' in an ASM file.
# Using a FeaturePcd make a '(BOOLEAN) casting for its value which is not understood by the preprocessor.
gArmTokenSpaceGuid.PcdVFPEnabled|0|UINT32|0x00000024
gArmTokenSpaceGuid.PcdCpuVectorBaseAddress|0xffff0000|UINT64|0x00000004
gArmTokenSpaceGuid.PcdCpuResetAddress|0x00000000|UINT32|0x00000005
#
# ARM Secure Firmware PCDs
#
gArmTokenSpaceGuid.PcdSecureFdBaseAddress|0|UINT64|0x00000015
gArmTokenSpaceGuid.PcdSecureFdSize|0|UINT32|0x00000016
gArmTokenSpaceGuid.PcdSecureFvBaseAddress|0x0|UINT64|0x0000002F
gArmTokenSpaceGuid.PcdSecureFvSize|0x0|UINT32|0x00000030
#
# ARM Hypervisor Firmware PCDs
#
gArmTokenSpaceGuid.PcdHypFdBaseAddress|0|UINT32|0x0000003A
gArmTokenSpaceGuid.PcdHypFdSize|0|UINT32|0x0000003B
gArmTokenSpaceGuid.PcdHypFvBaseAddress|0|UINT32|0x0000003C
gArmTokenSpaceGuid.PcdHypFvSize|0|UINT32|0x0000003D
# Use ClusterId + CoreId to identify the PrimaryCore
gArmTokenSpaceGuid.PcdArmPrimaryCoreMask|0xF03|UINT32|0x00000031
# The Primary Core is ClusterId[0] & CoreId[0]
gArmTokenSpaceGuid.PcdArmPrimaryCore|0|UINT32|0x00000037
#
# SMBIOS PCDs
#
gArmTokenSpaceGuid.PcdSystemProductName|L""|VOID*|0x30000053
gArmTokenSpaceGuid.PcdSystemVersion|L""|VOID*|0x30000054
gArmTokenSpaceGuid.PcdBaseBoardManufacturer|L""|VOID*|0x30000055
gArmTokenSpaceGuid.PcdBaseBoardProductName|L""|VOID*|0x30000056
gArmTokenSpaceGuid.PcdBaseBoardVersion|L""|VOID*|0x30000057
gArmTokenSpaceGuid.PcdProcessorManufacturer|L""|VOID*|0x30000071
gArmTokenSpaceGuid.PcdProcessorVersion|L""|VOID*|0x30000072
gArmTokenSpaceGuid.PcdProcessorSerialNumber|L""|VOID*|0x30000073
gArmTokenSpaceGuid.PcdProcessorAssetTag|L""|VOID*|0x30000074
gArmTokenSpaceGuid.PcdProcessorPartNumber|L""|VOID*|0x30000075
#
# ARM L2x0 PCDs
#
gArmTokenSpaceGuid.PcdL2x0ControllerBase|0|UINT32|0x0000001B
#
# ARM Normal (or Non Secure) Firmware PCDs
#
gArmTokenSpaceGuid.PcdFdSize|0|UINT32|0x0000002C
gArmTokenSpaceGuid.PcdFvSize|0|UINT32|0x0000002E
#
# Value to add to a host address to obtain a device address, using
# unsigned 64-bit integer arithmetic on both ARM and AArch64. This
# means we can rely on truncation on overflow to specify negative
# offsets.
#
gArmTokenSpaceGuid.PcdArmDmaDeviceOffset|0x0|UINT64|0x0000044
#
# Boot the Uefi Shell instead of UiApp when no valid boot option is found.
# This is useful in CI environment so that startup.nsh can be launched.
# The default value is FALSE.
#
gArmTokenSpaceGuid.PcdUefiShellDefaultBootEnable|FALSE|BOOLEAN|0x0000052
[PcdsFixedAtBuild.common, PcdsPatchableInModule.common]
gArmTokenSpaceGuid.PcdFdBaseAddress|0|UINT64|0x0000002B
gArmTokenSpaceGuid.PcdFvBaseAddress|0|UINT64|0x0000002D
[PcdsFixedAtBuild.ARM]
#
# ARM Security Extension
#
# Secure Configuration Register
# - BIT0 : NS - Non Secure bit
# - BIT1 : IRQ Handler
# - BIT2 : FIQ Handler
# - BIT3 : EA - External Abort
# - BIT4 : FW - F bit writable
# - BIT5 : AW - A bit writable
# - BIT6 : nET - Not Early Termination
# - BIT7 : SCD - Secure Monitor Call Disable
# - BIT8 : HCE - Hyp Call enable
# - BIT9 : SIF - Secure Instruction Fetch
# 0x31 = NS | EA | FW
gArmTokenSpaceGuid.PcdArmScr|0x31|UINT32|0x00000038
# By default we do not do a transition to non-secure mode
gArmTokenSpaceGuid.PcdArmNonSecModeTransition|0x0|UINT32|0x0000003E
# Non Secure Access Control Register
# - BIT15 : NSASEDIS - Disable Non-secure Advanced SIMD functionality
# - BIT14 : NSD32DIS - Disable Non-secure use of D16-D31
# - BIT11 : cp11 - Non-secure access to coprocessor 11 enable
# - BIT10 : cp10 - Non-secure access to coprocessor 10 enable
# 0xC00 = cp10 | cp11
gArmTokenSpaceGuid.PcdArmNsacr|0xC00|UINT32|0x00000039
[PcdsFixedAtBuild.AARCH64]
#
# AArch64 Security Extension
#
# Secure Configuration Register
# - BIT0 : NS - Non Secure bit
# - BIT1 : IRQ Handler
# - BIT2 : FIQ Handler
# - BIT3 : EA - External Abort
# - BIT4 : FW - F bit writable
# - BIT5 : AW - A bit writable
# - BIT6 : nET - Not Early Termination
# - BIT7 : SCD - Secure Monitor Call Disable
# - BIT8 : HCE - Hyp Call enable
# - BIT9 : SIF - Secure Instruction Fetch
# - BIT10: RW - Register width control for lower exception levels
# - BIT11: SIF - Enables Secure EL1 access to EL1 Architectural Timer
# - BIT12: TWI - Trap WFI
# - BIT13: TWE - Trap WFE
# 0x501 = NS | HCE | RW
gArmTokenSpaceGuid.PcdArmScr|0x501|UINT32|0x00000038
# By default we do transition to EL2 non-secure mode with Stack for EL2.
# Mode Description Bits
# NS EL2 SP2 all interrupts disabled = 0x3c9
# NS EL1 SP1 all interrupts disabled = 0x3c5
# Other modes include using SP0 or switching to Aarch32, but these are
# not currently supported.
gArmTokenSpaceGuid.PcdArmNonSecModeTransition|0x3c9|UINT32|0x0000003E
#
# These PCDs are also defined as 'PcdsDynamic' or 'PcdsPatchableInModule' to be
# redefined when using UEFI in a context of virtual machine.
#
[PcdsFixedAtBuild.common, PcdsDynamic.common, PcdsPatchableInModule.common]
# System Memory (DRAM): These PCDs define the region of in-built system memory
# Some platforms can get DRAM extensions, these additional regions may be
# declared to UEFI using separate resource descriptor HOBs
gArmTokenSpaceGuid.PcdSystemMemoryBase|0|UINT64|0x00000029
gArmTokenSpaceGuid.PcdSystemMemorySize|0|UINT64|0x0000002A
gArmTokenSpaceGuid.PcdMmBufferBase|0|UINT64|0x00000045
gArmTokenSpaceGuid.PcdMmBufferSize|0|UINT64|0x00000046
gArmTokenSpaceGuid.PcdSystemBiosRelease|0xFFFF|UINT16|0x30000058
gArmTokenSpaceGuid.PcdEmbeddedControllerFirmwareRelease|0xFFFF|UINT16|0x30000059
[PcdsFixedAtBuild.common, PcdsDynamic.common]
#
# ARM Architectural Timer
#
gArmTokenSpaceGuid.PcdArmArchTimerFreqInHz|0|UINT32|0x00000034
# ARM Architectural Timer Interrupt(GIC PPI) numbers
gArmTokenSpaceGuid.PcdArmArchTimerSecIntrNum|29|UINT32|0x00000035
gArmTokenSpaceGuid.PcdArmArchTimerIntrNum|30|UINT32|0x00000036
gArmTokenSpaceGuid.PcdArmArchTimerHypIntrNum|26|UINT32|0x00000040
gArmTokenSpaceGuid.PcdArmArchTimerVirtIntrNum|27|UINT32|0x00000041
gArmTokenSpaceGuid.PcdArmArchTimerHypVirtIntrNum|28|UINT32|0x0000004A
#
# ARM Generic Watchdog
#
gArmTokenSpaceGuid.PcdGenericWatchdogControlBase|0x2A440000|UINT64|0x00000007
gArmTokenSpaceGuid.PcdGenericWatchdogRefreshBase|0x2A450000|UINT64|0x00000008
gArmTokenSpaceGuid.PcdGenericWatchdogEl2IntrNum|93|UINT32|0x00000009
#
# ARM Generic Interrupt Controller
#
gArmTokenSpaceGuid.PcdGicDistributorBase|0|UINT64|0x0000000C
# Base address for the GIC Redistributor region that contains the boot CPU
gArmTokenSpaceGuid.PcdGicRedistributorsBase|0|UINT64|0x0000000E
gArmTokenSpaceGuid.PcdGicInterruptInterfaceBase|0|UINT64|0x0000000D
gArmTokenSpaceGuid.PcdGicSgiIntId|0|UINT32|0x00000025
#
# Bases, sizes and translation offsets of IO and MMIO spaces, respectively.
# Note that "IO" is just another MMIO range that simulates IO space; there
# are no special instructions to access it.
#
# The base addresses PcdPciIoBase, PcdPciMmio32Base and PcdPciMmio64Base are
# specific to their containing address spaces. In order to get the physical
# address for the CPU, for a given access, the respective translation value
# has to be added.
#
# The translations always have to be initialized like this, using UINT64:
#
# UINT64 IoCpuBase; // mapping target in 64-bit cpu-physical space
# UINT64 Mmio32CpuBase; // mapping target in 64-bit cpu-physical space
# UINT64 Mmio64CpuBase; // mapping target in 64-bit cpu-physical space
#
# gEfiMdePkgTokenSpaceGuid.PcdPciIoTranslation = IoCpuBase - PcdPciIoBase;
# gEfiMdePkgTokenSpaceGuid.PcdPciMmio32Translation = Mmio32CpuBase - (UINT64)PcdPciMmio32Base;
# gEfiMdePkgTokenSpaceGuid.PcdPciMmio64Translation = Mmio64CpuBase - PcdPciMmio64Base;
#
# because (a) the target address space (ie. the cpu-physical space) is
# 64-bit, and (b) the translation values are meant as offsets for *modular*
# arithmetic.
#
# Accordingly, the translation itself needs to be implemented as:
#
# UINT64 UntranslatedIoAddress; // input parameter
# UINT32 UntranslatedMmio32Address; // input parameter
# UINT64 UntranslatedMmio64Address; // input parameter
#
# UINT64 TranslatedIoAddress; // output parameter
# UINT64 TranslatedMmio32Address; // output parameter
# UINT64 TranslatedMmio64Address; // output parameter
#
# TranslatedIoAddress = UntranslatedIoAddress +
# gEfiMdePkgTokenSpaceGuid.PcdPciIoTranslation;
# TranslatedMmio32Address = (UINT64)UntranslatedMmio32Address +
# gEfiMdePkgTokenSpaceGuid.PcdPciMmio32Translation;
# TranslatedMmio64Address = UntranslatedMmio64Address +
# gEfiMdePkgTokenSpaceGuid.PcdPciMmio64Translation;
#
# The modular arithmetic performed in UINT64 ensures that the translation
# works correctly regardless of the relation between IoCpuBase and
# PcdPciIoBase, Mmio32CpuBase and PcdPciMmio32Base, and Mmio64CpuBase and
# PcdPciMmio64Base.
#
gArmTokenSpaceGuid.PcdPciIoBase|0x0|UINT64|0x00000050
gArmTokenSpaceGuid.PcdPciIoSize|0x0|UINT64|0x00000051
gArmTokenSpaceGuid.PcdPciMmio32Base|0x0|UINT32|0x00000053
gArmTokenSpaceGuid.PcdPciMmio32Size|0x0|UINT32|0x00000054
gArmTokenSpaceGuid.PcdPciMmio64Base|0x0|UINT64|0x00000056
gArmTokenSpaceGuid.PcdPciMmio64Size|0x0|UINT64|0x00000057
#
# Inclusive range of allowed PCI buses.
#
gArmTokenSpaceGuid.PcdPciBusMin|0x0|UINT32|0x00000059
gArmTokenSpaceGuid.PcdPciBusMax|0x0|UINT32|0x0000005A
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 09:32:41 +02:00
[PcdsDynamicEx]
#
# This dynamic PCD hold the GUID of a firmware FFS which contains
# the LinuxBoot payload.
#
gArmTokenSpaceGuid.PcdLinuxBootFileGuid|{0x0}|VOID*|0x0000005C