A virtual journey: From hardware virtualization to Hyper-V's Virtual Trust Levels
https://blog.quarkslab.com/a-virtual-journey-from-hardware-virtualization-to-hyper-vs-virtual-trust-levels.html
> This blog post aims to explain how Hyper-V enhances the operating system security through creating new levels of trust orthogonal to rings, named the Virtual Trust Levels (VTLs), and how these are represented at the lowest levels.
> We will first discuss the hardware virtualization extensions with a focus on Intel Virtualization Technology, dubbed Intel VT-x, then we will see how Hyper-V leverages the hardware virtualization to strengthen the operating system security. The approach, based on reverse engineering and debugging Hyper-V, led to the discovery of Hyper-V’s inner structures and how they are used to achieve the goal of memory segregation between different VTLs within the same virtual machine.
#hyperv #vtl #vbs