Tianocore/edk2.git/OvmfPkg/Library/QemuBootOrderLib/ExtraRootBusMap.h, branch master

OvmfPkg: 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. Note: Headers taken directly from external projects, such as those in OvmfPkg/Include/IndustryStandard/Xen/ were not modified since they may be periodically re-synced and do not follow other edk2 coding stadards. 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

OvmfPkg: Apply uncrustify changes

2021-12-07T17:24:28+00:00

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3737 Apply uncrustify changes to .c/.h files in the OvmfPkg package Cc: Andrew Fish Cc: Leif Lindholm Cc: Michael D Kinney Signed-off-by: Michael Kubacki Reviewed-by: Andrew Fish

OvmfPkg: Replace BSD License with BSD+Patent License

2019-04-09T17:58:19+00:00

https://bugzilla.tianocore.org/show_bug.cgi?id=1373 Replace BSD 2-Clause License with BSD+Patent License. This change is based on the following emails: https://lists.01.org/pipermail/edk2-devel/2019-February/036260.html https://lists.01.org/pipermail/edk2-devel/2018-October/030385.html RFCs with detailed process for the license change: V3: https://lists.01.org/pipermail/edk2-devel/2019-March/038116.html V2: https://lists.01.org/pipermail/edk2-devel/2019-March/037669.html V1: https://lists.01.org/pipermail/edk2-devel/2019-March/037500.html Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Michael D Kinney Reviewed-by: Laszlo Ersek

OvmfPkg, ArmVirtPkg: rename QemuNewBootOrderLib to QemuBootOrderLib

2016-05-25T10:25:28+00:00

This completes the transition to the new BDS. The FILE_GUID in "QemuBootOrderLib.inf" is intentionally not changed. Cc: Ard Biesheuvel Cc: Gary Ching-Pang Lin Cc: Jordan Justen Cc: Ruiyu Ni Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Laszlo Ersek Reviewed-by: Ard Biesheuvel Reviewed-by: Jordan Justen

OvmfPkg: remove QemuBootOrderLib instance

2016-05-25T10:24:50+00:00

This library instance is no longer referenced. Cc: Ard Biesheuvel Cc: Gary Ching-Pang Lin Cc: Jordan Justen Cc: Ruiyu Ni Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Laszlo Ersek Reviewed-by: Jordan Justen

OvmfPkg: QemuBootOrderLib: introduce ExtraRootBusMap

2015-07-14T12:02:39+00:00

SeaBIOS requires the OpenFirmware device paths exported in the "bootorder" fw-cfg file to refer to extra (PXB) root buses by their relative positions (in increasing bus number order) rather than by actual bus numbers. However, OVMF's PCI host bridge / root bridge driver creates PciRoot(UID) device path nodes for extra PCI root buses with UID=bus_nr, not position. (These ACPI devpath UID values must, and do, match the UID values exposed in QEMU's ACPI payload, generated for PXB root buses.) Therefore the boot order matching logic will have to map extra root bus positions to bus numbers. Add a small group of utility functions to help with that. Cc: Jordan Justen Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Laszlo Ersek Reviewed-by: Jordan Justen git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@17964 6f19259b-4bc3-4df7-8a09-765794883524