How to build OVMF

Laurie Jarlstrom edited this page Dec 1, 2016 · 4 revisions
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Building OVMF is fairly easy once you have installed a few pre-requisites. Please note, however, that building OVMF is not required if you are only interested in running OVMF, since we have provided pre-built binaries of OVMF.

Build Pre-requisites

  • A edk2 build tree capable of building UEFI images
    • If you are new to edk2 building then these getting started instructions may be helpful.
  • An ASL compiler configured in your edk2 build tree
    • Either the IASL compiler or the Microsoft ASL compiler can be used
      • For Unix-like operating systems, IASL is the only option:
        • For newer Linux distributions, you should be able to install iasl via the distribution's package management system. (This page may help.)
        • Or, the Unix-like systems getting started guide includes details for installing IASL as well.
      • For Windows, you can download pre-built version of IASL compiler from
      • For Windows, you can also download a pre-built version of the Microsoft ASL compiler from

Choosing which version of OVMF to build

First decide which version of OVMF you will build. You can choose to build the IA32 processor architecture and/or the X64 processor architecture. You should take into account the processor architectures which your toolchain is capable of building. Depending upon which you select, you should modify the ACTIVE_PLATFORM and TARGET_ARCH in Conf/target.txt.

OvmfPkg/OvmfPkgIa32.dsc IA32 IA32 IA32
OvmfPkg/OvmfPkgIa32X64.dsc IA32 X64 IA32 X64
OvmfPkg/OvmfPkgX64.dsc X64 X64 X64

Example: Conf/target.txt values to build x64 UEFI image for OVMF using GCC5 compiler:

ACTIVE_PLATFORM       = OvmfPkg/OvmfPkgX64.dsc
TARGET_ARCH           = X64

Once you have modified Conf/target.txt, you can run the build command.

bash$ build

If successful, you should now have a OVMF.Fd file under the Build sub-directory. The exact directory under the Build directory will depend upon the toolchain, dsc and processor architecture.

You can use OVMF.Fd to run OVMF.

See Also