Hardware virtualization

Hardware virtualization

1. Para

   • Software interface to virtual machines
   • Comparison
     • hypercalls
     • Guest OS codified to issue hypercalls so it.
     • Good performance
     • More secure
     • Fast

2. Full

   • Hardware assisted
     • A.K.A native virtualization, this is an approach to full virtualization
   • Completely simulated
   • Comparison
     • Binary translation and direct execution
     • Unmodified guest OS and excellent compatibility.
     • Moderate performance
     • Less secure
     • Moderate speed

3. virtualization as complete hardware platform or just parts of it to run OS

4. Protective rings

   • Protect Data and functionality
   • Protect against malwares
   • Used in mode 2 of virtualization
   • abstraction of hardware