Tianocore/edk2.git/UefiPayloadPkg/Include/Library, branch master

UefiPayloadPkg: Set bootmode from bootloader

2026-10-08T17:00:41+00:00

The coreboot bootloader always passes information about the boot mode since commit [1]. Use the new coreboot table when present to update the bootmode. When the table is not present or contains unknown values the bootmode is not updated. This allows to support UEFI capsule updates that need the whole SPI flash to be unlocked. Since this is also a security concern the payload should never follow the regular boot flow, but reboot the system when done. 1: https://review.coreboot.org/c/coreboot/+/94094/ TEST=Can update the system using UEFI capsule on disk. coreboot detects the capsule and unlocks the SPI flash, sets the boot mode to LB_BOOT_MODE_FLASH_UPDATE and UefiPayload updates BootMode in the HOB handoff table allowing the capsule update code to run. Signed-off-by: Patrick Rudolph

UefiPayloadPkg: Fix use of uninitialized memory

2026-09-28T17:54:30+00:00

In coreboot the SMBIOS table generation is optional. When no SMBIOS tables where found UefiPayloadEntry creates a HOB, but doesn't initialize the contents. The gUniversalPayloadSmbiosTableGuid HOB is then used by SmbiosDxe and it crashes when the pointer in the HOB doesn't point to mapped DRAM. Fix that by only creating gUniversalPayloadSmbiosTableGuid HOB when SMBIOS tables where found. TEST=Can boot using UEFIPayload when coreboot doesn't provide SMBIOS tables. Signed-off-by: Patrick Rudolph

UefiPayloadPkg: Replace include guards with #pragma once

2026-02-23T21:01:28+00:00

Replace traditional `#ifndef`/`#define`/`#endif` include guards with `#pragma` once. `#pragma once` is a widely supported preprocessor directive that prevents header files from being included multiple times. It is supported by all toolchains used to build edk2: GCC, Clang/LLVM, and MSVC. Compared to macro-based include guards, `#pragma once`: - Eliminates the risk of macro name collisions or copy/paste errors where two headers inadvertently use the same guard macro. - Eliminate inconsistency in the way include guard macros are named (e.g., some files use `__FILE_H__`, others use `FILE_H_`, etc.). - Reduces boilerplate (three lines replaced by one). - Avoids polluting the macro namespace with guard symbols. - Can improve build times as the preprocessor can skip re-opening the file entirely, rather than re-reading it to find the matching `#endif` ("multiple-include optimization"). - Note that some compilers may already optimize traditional include guards, by recognzining the idiomatic pattern. This change is made acknowledging that overall portability of the code will technically be reduced, as `#pragma once` is not part of the C/C++ standards. However, this is considered acceptable given: 1. edk2 already defines a subset of supported compilers in BaseTools/Conf/tools_def.template, all of which have supported `#pragma once` for over two decades. 2. There have been concerns raised to the project about inconsistent include guard naming and potential macro collisions. Approximate compiler support dates: - MSVC: Supported since Visual C++ 4.2 (1996) - GCC: Supported since 3.4 (2004) (http://gnu.ist.utl.pt/software/gcc/gcc-3.4/changes.html) - Clang (LLVM based): Since initial release in 2007 Signed-off-by: Michael Kubacki

UefiPayloadPkg: Fix build failure with GCC

2026-01-21T05:03:45+00:00

Add missing EFIAPI to BL_CAPSULE_CALLBACK to fix build issue. Fixes: cc149a8e Signed-off-by: Khalid Ali

UefiPayloadPkg: PayloadEntryHelperLib: Adding new helper library

2025-11-22T10:19:48+00:00

This is a newly added helper library to help providing utilities common to UefiPayloadPkg. This change will pave ways to separating standard services such as "MemoryAllocation" into its own library classes. Signed-off-by: Kun Qin

UefiPayloadPkg/SmmStore: Add API to read/write/erase any flash block

2025-08-25T11:54:17+00:00

This allows reusing SMMSTORE protocol for the purpose of firmware updates. Signed-off-by: Sergii Dmytruk

UefiPayloadPkg/UefiPayloadEntry: Import update capsules from bootloader

2025-08-25T11:54:17+00:00

The implementation is for CbParseLib, SblParseLib returns success while doing nothing. The HOBs created by BuildCvHob() will be eventually picked up and processed in DXE phase by MdeModulePkg/Library/DxeCapsuleLibFmp/DxeCapsuleProcessLib.c Because multiple capsules can be chained (simply by placing them one after another), coreboot passes them as a single memory range which can provide tenths of capsules. coreboot won't pass any capsules unless it finds CapsuleUpdateData* EFI variables and is able to parse memory ranges they point to as scatter-gather lists of pages containing capsules. Signed-off-by: Sergii Dmytruk

UefiPayloadPkg/BlParseLib: Add parsing of firmware info

2025-08-25T11:54:17+00:00

The implementation is for CbParseLib, SblParseLib returns an error. coreboot's CB_TAG_FW_INFO is a machine-friendly version of a system firmware component. A component is identified by a GUID. This is meant to be primarily a source of information for ESRT. The following coreboot options translate directly into fields of the structure with information: - CONFIG_DRIVERS_EFI_MAIN_FW_GUID - CONFIG_DRIVERS_EFI_MAIN_FW_VERSION - CONFIG_DRIVERS_EFI_MAIN_FW_LSV - CONFIG_ROM_SIZE The first 3 options depend on CONFIG_DRIVERS_EFI_FW_INFO. Version as a string depends on CONFIG_LOCALVERSION as well as version of the code base (misnamed as KERNELVERSION in coreboot's build system). Signed-off-by: Sergii Dmytruk

UefiPayloadPkg: Add SmmStoreLib

2025-04-09T18:12:48+00:00

Implement all of the FVB protocol functions on top of the SmmStore as a library. The library consumes the introduced gEfiSmmStoreInfoHobGuid. The SMI handler uses a fixed communication buffer in reserved DRAM. To initiate a transaction you must write to the I/O APM_CNT port. Tests on Intel(R) Xeon(R) E-2288G CPU @ 3.70G showed that the SMI isn't triggered with a probability of 1:40 of all cases when called in a tight loop. The CPU continues running and the SMI is triggered asynchronously a few clock cycles later. coreboot only handles synchronous APM request and does nothing on asynchronous APM triggers. As there's no livesign from SMM it's impossible to tell if the handler has run. Just wait a bit and try again to trigger a synchronous SMI. Tests confirmed that out of 5 million tries the SMI is now always handled. When a synchronous SMI happens with the correct write to the APM_CNT port, the ebx register is checked first that it doesn't point to SMRAM. If it doesn't it's used to read in the arguments that define an SmmStore transaction. The SMI handler will only operate on a predefined and memory mapped region in the boot media. Signed-off-by: Patrick Rudolph Signed-off-by: Sergii Dmytruk

UefiPayloadPkg: Add SmmStoreInfoGuid

2025-04-09T18:12:48+00:00

Add a new InfoHob that contains the SmmStore information passed from coreboot tables when the SMMSTOREV2 feature is enabled. This will be used to implement the FVB on top of the SMI installed by coreboot. Signed-off-by: Patrick Rudolph Signed-off-by: Sergii Dmytruk