Device Virtualization Quizz

Devices, busses, drivers and other shenanigans

Device Virtualization Quizz

A CPU runs all instructions from a VM

1: A CPU runs all instructions from a VM

True

False

What is a VM-Exit

2: What is a VM-Exit

A virtual machine shutdown

A transition between two CPU modes

A use logging out from its VM

How does a CPU handle a VM-Exit

3: How does a CPU handle a VM-Exit

It ignores it

It runs a special VM-Exit handler

It halts and waits for the user input

Select the wrong answer

4: Select the wrong answer

A GPU is a device

An ethernet card is a device

A USB port is a device

A USB keyboard is a device

What is a bus?

5: What is a bus?

A transport vehicle

A piece of hardware

A USB cable

A PCI card

Devices drivers…

6: Devices drivers…

Are shared libraries

Are pieces of code

Can only be run in kernel mode

Control buses

An network card just received a TCP packet. How can it let the processor know about it?

7: An network card just received a TCP packet. How can it let the processor know about it?

It sends an interrupt to the processor

It does not have to, the processor will pick it up after a while

The processor does not need to know, the card processes the packet

The ethernet card generates a VM exit

Can virtual machines use devices?

8: Can virtual machines use devices?

Yes

No

Can a I share my NVIDIA GPU with an Ubuntu virtual machine?

9: Can a I share my NVIDIA GPU with an Ubuntu virtual machine?

Yes

No

Can I donate my AMD GPU to an Ubuntu virtual machine?

10: Can I donate my AMD GPU to an Ubuntu virtual machine?

Yes

No

What is an virtual device?

11: What is an virtual device?

A physical device from the host that the virtual machine uses directly

A physical device that the VMM emulates for the virtual machine

What is the most performant way to virtualize a device?

12: What is the most performant way to virtualize a device?

Direct assignement of a physical device in the VM

Physical device emulation from the VMM

Device paravirtualization