CHapter 7: Virtualisation hardware assists

Question 1

What is required to share resources?

Answer 1

software virtualisation layer

Question 2

What is software virtualization layer know as

Answer 2

Virtual Machine Manager (VMM)

Question 3

What are five reason to virtualisation a server?

Answer 3

1. Improve management of physical capacity
2. Improve control of machines
3. Simplify operation of virtual server pool
4. Reduce risks to business continuity
5. Dynamically scale resources to meet demand

Question 4

What is the ration of consolidation virtualisation

Answer 4

5: 1 to 10:1 in the enterprise
20: 1 is not uncommon

Question 5

What are two [2] hardware virtualisation hardware

Answer 5

1. Intel Virtualization Technology (VT)

2. AMD-V (Virtualization)

Question 6

What are Privilege Levels

Answer 6

Levels determine what hardware resources can be access by software

Question 7

How many Privilege Levels are there

Answer 7

4
0 - is the highest
3 - Is the lowest

Question 8

Which Privilege Level does normal O/S use

Answer 8

Level 0 [Zero] the highest - it has direct access to the hardware

Question 9

Moving from a more powerful to a less powerful level is called

Answer 9

ring deprivileging

Question 10

What is Binary translation

Answer 10

Software method used by hypervisor in MS and VMware to handle issues presented by ring deprivileging

Question 11

What is Para virtualisation

Answer 11

Is used by Xen virtualisation system to handle the issues of ring de-privileging

Question 12

What is Nesting Pages

7.1.4 page 137 [169]

Answer 12

Nested paging (also known as Hardware Assisted Paging) is a technology that allows significantly improved handling of multiple guest operating systems.

Question 13

What are Intel and AMD Nesting Paging

Answer 13

1. Intel - Extended Page Tables

2. AMD - Rapid Virtualization Indexing

Question 14

What processor does intel VT embed its nesting paging feature

Answer 14

Xeon 5500 in 2009

Question 15

What are the three [3] Hardware Requirements for Virtualisation?

Answer 15

1. Full BIOS support
2. Processor technology support
3. Hypervisor support

Question 16

What does VMM stand for?

Answer 16

Virtual Memory Manager

Question 17

What is VMCS Stand for?

Answer 17

Virtual Machine Control Structure

Question 18

What is VPID Stand for?

Answer 18

Virtual Processor Identifier

Question 19

What does VPID Virtual Processor Identifier

Answer 19

allows a virtual machine manager to assign a different non-zero VPID to each virtual processor (the zero VPID is reserved for the VMM)

Question 20

What is EPT Stand for?

Answer 20

Extended Page Table

Question 21

What does (EPT) Extended Page Table
7.2.2. Page 139 [171]

Answer 21

is the Intel implementation of nested paging for virtualization.

Question 22

How much more improvement does Nesting Paging provide?

7.1.4 pg 137 [169]

Answer 22

provides a 5% to 30% performance improvement, depending on the type of workload for applications running in virtual machines

Question 23

When translation is performed, it is stored for future use in?
7.1.4 pg 137 [169]

Answer 23

Translation Look-aside Buffer (TLB)

Question 24

What are two [2] new VT-x CPU operations:

Answer 24

1. VMX root operation - VMM functions

2. VMX non-root operation - guest operating system functions