# Bareflank/hypervisor

lightweight hypervisor SDK written in C++ with support for Windows, Linux and UEFI

Repository: https://github.com/Bareflank/hypervisor
Canonical: https://ross.abutalabs.com/products/hypervisor
Language: C++
License: NOASSERTION
License Family: other
Topics: bareflank, stl, hypervisor, linux, windows, cxx, gsl
Last push: 2024-08-14T18:09:39+00:00

## Health v2 (maintenance only)
Score: 23/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 8, longevity 100
- inputs: {"age_days": 3983, "days_push": 749, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1511, forks 220 (observed 2026-08-28T04:04:55.955271+00:00)

## What it is
Bareflank is an open-source hypervisor SDK written in C++ (with Rust support) for rapidly prototyping custom hypervisors on 64-bit Intel and AMD CPUs, running on Windows, Linux, and UEFI. It provides only enough virtualization support to start and stop a hypervisor, serving as scaffolding for education, research, or building a full hypervisor like MicroV.

## Use cases
- build my own hypervisor from scratch
- learn how hypervisors and VT-x work
- prototype virtualization research on Intel/AMD
- minimal hypervisor SDK for education
- create a type-1 hypervisor for Windows and Linux
- experiment with bare-metal virtualization in C++

## When to choose
- you want to learn hypervisor internals or conduct virtualization research
- you need a clean, well-tested (100% unit coverage, AUTOSAR-compliant) foundation to build a custom hypervisor
- you need cross-OS support including UEFI

## When to avoid
- you need a complete, fully functional hypervisor today (use MicroV or SimpleVisor instead)
- you need production VM hosting with device passthrough, live migration, etc.
- you need ARM, RISC-V, or PowerPC support (only planned)

## Facets
- artifact type: library
- maturity: active
- function: sdk, developer-tools, simulation, security
- domain: developer-tools, operating-systems, security, education
- platform: windows, cpp, rust, cross-platform
- tags: hypervisor, virtualization, bare-metal, intel-vt-x, amd-v, uefi, research, instructional, linux

## Member repositories
- Bareflank/hypervisor (main) score 23

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:04:55.955271+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T04:32:21.997277+00:00, confidence not recorded.
  - readme: https://github.com/Bareflank/hypervisor (fetched 2026-08-28T04:04:55.955271+00:00, sha aaa9c4170ad6)
- Data as of 2026-08-30T08:39:29.467469+00:00.