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

OvmfPkg/MapMmioLib: Support runtime drivers

2026-07-21T10:25:17+00:00

Allow MapMmioLib to be consumed by DXE_RUNTIME_DRIVER modules. MapMmioMemory() depends on DXE services, so it cannot map new ranges after ExitBootServices(). Return EFI_ACCESS_DENIED when called at runtime. This allows runtime drivers such as ArmVirtPkg/Library/KvmtoolRtcFdtClientLib to use MapMmioLib for boot-time MMIO setup. Signed-off-by: Sami Mujawar

OvmfPkg/MapMmioLib: Introduce a library for mapping MMIO regions

2026-07-21T10:25:17+00:00

Introduce MapMmioLib to add MMIO regions to the GCD memory map. MapMmioMemory() normalizes the requested range to page boundaries, adds missing MMIO descriptors, and updates attributes for new and existing MMIO descriptors. Existing descriptors of any other type are reported as conflicts. Signed-off-by: Sami Mujawar

OvmfPkg/QemuFwCfgSimpleParserLib: export QemuFwCfgGetAsString()

2026-07-20T16:53:45+00:00

Make QemuFwCfgGetAsString() a public EFIAPI entry point instead of a STATIC helper, so it can be used by consumers that need the raw fw_cfg string value rather than a parsed boolean or integer. Signed-off-by: Luigi Leonardi

OvmfPkg/XenHypercallLib: Remove unused HobLib

2026-04-29T14:04:00+00:00

Commit 0e6f6c715c59 removed the use of gEfiXenInfoGuid. Fixes: 0e6f6c715c59 ("OvmfPkg/XenHypercallLib: Use direct hypercalls") Signed-off-by: Anthony PERARD

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/PlatformInitLib: reserve igvm parameter area

2025-12-10T12:35:02+00:00

Signed-off-by: Gerd Hoffmann

OvmfPkg/igvm: add PlatformIgvmVpCount

2025-09-29T14:28:23+00:00

Add support for getting the cpu count via IGVM parameter. Signed-off-by: Gerd Hoffmann

OvmfPkg/igvm: handle igvm data hobs

2025-09-29T14:28:23+00:00

In case HOBs are present in the IGVM data hob area register the memory regions as bootservice data to avoid them being overwritten. Also copy over the HOBs so they can easily be found later using standard HobLib functions. Signed-off-by: Gerd Hoffmann

OvmfPkg/igvm: add igvm memory map support.

2025-09-29T14:28:23+00:00

In case a IGVM memory map is present in the parameter area use that when detecting guest memory. Signed-off-by: Gerd Hoffmann

OvmfPkg/MemEncryptSevLib: Check if SEV-SNP coherency mitigitation is needed

2025-09-09T17:43:31+00:00

CPUID bit Fn8000001F_EBX[31] defines the COHERNECY_SFW_NO CPUID bit that, when set, indicates that the software mitigation for this vulnerability is not needed. Add support to check for this CPUID bit and avoid the mitigation if set. Signed-off-by: Tom Lendacky