A hypervisor, also known as a virtual machine monitor (VMM), is a software, firmware, or hardware component that enables the creation and management of virtual machines (VMs) on a physical host machine. It allows multiple operating systems (OS) or virtual machines to run concurrently on a single physical server, effectively partitioning the available resources such as CPU, memory, storage, and networking.

There are two main types of hypervisors:

1. Type 1 Hypervisor (Bare-Metal Hypervisor): It runs directly on the host's hardware and provides a layer of abstraction between the physical hardware and the virtual machines. Examples of type 1 hypervisors include Microsoft Hyper-V, VMware ESXi, and Citrix XenServer.

2. Type 2 Hypervisor (Hosted Hypervisor): It runs as a software layer on top of an existing operating system. The underlying operating system provides hardware abstraction, and the hypervisor manages the virtual machines. Examples of type 2 hypervisors include Oracle VirtualBox and VMware Workstation.

Hypervisors play a crucial role in server virtualization, allowing organizations to consolidate their physical infrastructure, improve resource utilization, and simplify the management of multiple virtual machines. They also enable the creation of isolated and independent virtual environments for testing, development, and deployment of applications without impacting the underlying host system.

1. Awesome Virtualization
2. Awesome Hyper-V exploitation
3. Awesome Vulnerability research

1. Virtual Machines: Versatile Platforms for Systems and Processes
2. Micro Kernel Book

1. RayanFam - Hyper visor from scratch
2. 7 Days to Virtualization: A Series on Hypervisor Development
3. NixHacker developing a hyper visor from scratch
4. Intro to Hypervisors for Game Hacking
5. Build a Hypervisor from scratch in rust
6. Create a minmilastic Virtual machine
7. Hyper-Visor for beginners
8. Creating a VM for fun
9. Introduction to VirtualBox security research
10. AMD-V Hyper visor development
11. Hyper-V attack surface
12. Building a minimalstic Virtual machine
13. Write your own VM Justin Meiners
14. CPU Emulation book

1. HV - Internals
2. Internals information about Hyper-V
3. Virtualization Internals Part 1 - Intro to Virtualization
4. Virtualization Internals Part 2 - VMWare and Virtualization using Binary Translation
5. Virtualization Internals Part 3 - Xen and Paravirtualization
6. Virtual machine in C
7. Debugging Hyper-V for vulnerability research
8. QEMU Internals

1. Light-weight Hyper-visor SDK
2. Hyper-V solution for x86 processors
3. Windows Hyper-visor platform docs/API
4. Building the Linux ARM Hypervisor
5. Hyper-visor driver for AMD processors
6. ACRN Hypervisors
7. Kraken A simple x86_64 AMD-V Hyper visor
8. tiniest x86-64 Linux emulator
9. Light-weight Intel x64/VT-x hypervisor written in C++
10. Hyper-V hacking framework - Voyager
11. Playground for generating virtual machine protected x64 assembly
12. AMD Hypervisor
13. SimpleVisor

1. Detecting VMware by reading invalid msr
2. Windows Kernel
3. Revisiting hardware-assisted page walks for virtualized systems
4. VM Forking & Hypervisor-Based Fuzzing with Xen
5. Verliog and state machines
6. Build your own CPU
7. Standa - Note , Decent blog posts related to Hyper-visors
8. V.V space - Blog posts
9. Chuong Security blog
10. Securing VMware
11. LKVM escape
12. VMProtect 2 - Detailed Analysis of the Virtual Machine Architecture
13. A Fuzzer for Hyper-V devices slides
14. Zero-day engineering Guide
15. Hyper-V RCE research
16. VBOX Fuzzing
17. The case for critical virtual technology
18. Boot drive encryption security on windows
19. Build your first LLVM Obfuscator
20. VX-Underground - Papers on Hyper-V
21. iPhone 11 emulated on QEMU
22. VMprotect de virtualization
23. What is virtualization and what are its Types
24. Huawei Security Hypervisor Vulnerability
25. Intel EPT Technical details
26. Apple data formats
27. Exploiting windows vulnerabilities with Hyper-V
28. Hypervisor Detection with SystemHypervisorDetailInformation
29. Static devirtualization series
30. The new Hyper-V attack surface
31. oracle-virtualbox-vhwa-use-after-free-privilege-escalation-vulnerability
32. Writing a simple 16 bit VM in less than 125 lines of C
33. Modern VMWARE Exploitation Techniques
34. Writing a simple 16 bit VM in less than 125 lines of C
35. Analysis of VirtualBox CVE-2023-21987 and CVE-2023-21991
36. Hyper-V Related work
37. AMD-V Hypervisor dev
38. How Aether visor works under the hood
39. Voyager - A Hyper-V Hacking Framework
40. Building a Language VM
41. Setting up an x86 CPU in 64-bit mode
42. Dragon Slaying Guide:BugHuntingInVMware Device Virtualization
43. Hyper-V internals researches history (2006-2024)
44. intel vt-x type 2 hypervisor
45. Debugging the windows hypervisor
46. Oracle VM VirtualBox 7.0.10 r158379 Escape
47. PS5 Hypervisor exploit + Slides
48. D1 - Dragon Slaying Guide: Bug Hunting In VMware Device Virtualization
49. Coding a virtual machine from scratch in C
50. An overview of Hypervisor implants