Intel's VT-x / VT-d APIs for the Bareflank hypervisor
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Extended APIs

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The Bareflank Hypervisor is an open source, hypervisor Software Development Toolkit (SDK), led by Assured Information Security, Inc. (AIS), that provides a set of APIs needed to rapidly prototype and create new hypervisors. To ease development, Bareflank is written in C/C++, and includes support for C++ exceptions, JSON, the GSL and the C++ Standard Template Library (STL).

The purpose of this repository, is to provide an extended set of APIs to build your hypervisors from. Some of these APIs include:

  • MSR / IO Bitmaps
  • VPID / Extended Page Tables (EPT)
  • Monitor Traps
  • Virtual APIC / Interrupt Management
  • Improved UEFI support

Compilation / Usage

To setup our extension, run the following:

git clone
git clone
mkdir build; cd build
cmake ../hypervisor -DDEFAULT_VMM=eapis_vmm -DEXTENSION=../extended_apis
make -j<# cores + 1>

To test out our extended version of Bareflank, run the following commands:

make driver_quick
make quick

to reverse this:

make unload
make driver_unload


Bareflank Hypervisor Website
Bareflank Hypervisor API Documentation


The Bareflank Hypervisor is licensed under the GNU Lesser General Public License v2.1 (LGPL).