List of Figures
List of Tables
Foreword

Part I: The Xen Virtual Machine
Chapter 1: The State of Virtualization
1.1 What Is Virtualization?
1.2 Why Virtualize?
1.3 The First Virtual Machine
1.4 The Problem of x86
1.5 Some Solutions
1.6 The Xen Philosophy
1.7 The Xen Architecture

Chapter 2: Exploring the Xen Virtual Architecture
2.1 Booting as a Paravirtualized Guest
2.2 Restricting Operations with Privilege Rings
2.3 Replacing Privileged Instructions with Hypercalls
2.4 Exploring the Xen Event Model
2.5 Communicating with Shared Memory
2.6 Split Device Driver Model
2.7 The VM Lifecycle
2.8 Exercise: The Simplest Xen Kernel

Chapter 3: Understanding Shared Info Pages
3.1 Retrieving Boot Time Info
3.2 The Shared Info Page
3.3 Time Keeping in Xen
3.4 Exercise: Implementing gettimeofday()

Chapter 4: Using Grant Tables
4.1 Sharing Memory
4.2 Device I/O Rings
4.3 Granting and Revoking Permissions
4.4 Exercise: Mapping a Granted Page
4.5 Exercise: Sharing Memory Between VMs

Chapter 5: Understanding Xen Memory Management
5.1 Managing Memory with x86
5.2 Pseudo-Physical Memory Model
5.3 Segmenting on 32-bitx86
5.4 Using Xen Memory Assists
5.5 Controlling Memory Usage with the Balloon Driver
5.6 Other Memory Operations
5.7 Updating the Page Tables
5.8 Exercise: Mapping the shared info page

Part II: Device I/O
Chapter 6: Understanding Device Drivers
6.1 The Split Driver Model
6.2 Moving Drivers Out of Domain 0
6.3 Understanding Shared Memory Ring Buffers
6.4 Connecting Devices with Xenbus
6.5 Handling Notifications from Events
6.6 Configuring Via the XenStore
6.7 Exercise: The Console Device

Chapter 7: Using Event Channels
7.1 Events and Interrupts
7.2 Handling Traps
7.3 Event Types
7.4 Requesting Events
7.5 Binding an Event Channel to a VCPU
7.6 Operations on Bound Channels
7.7 Getting a Channel’s Status
7.8 Masking Events
7.9 Events and Scheduling
7.10 Exercise: A Full Console Driver

Chapter 8: Looking through the XenStore
8.1 The XenStore Interface
8.2 Navigating the XenStore
8.3 The XenStore Device
8.4 Reading and Writing a Key
8.5 Other Operations

Chapter 9: Supporting the Core Devices
9.1 The Virtual Block Device Driver
9.2 Using Xen Networking

Chapter 10: Other Xen Devices
10.1 CD Support
10.2 Virtual Frame Buffer
10.3 The TPM Driver
10.4 Native Hardware
10.5 Adding a New Device Type

Part III: Xen Internals

Chapter 11: The Xen API
11.1 XML-RPC
11.2 Exploring the Xen Interface Hierarchy
11.3 The Xen API Classes
11.4 The Function of Xend
11.5 Xm command line
11.6 Xen CIM providers
11.7 Example: Enumerating Running VMs
11.8 Summary

Chapter 12: Virtual Machine Scheduling
12.1 Overview of the Scheduler Interface
12.2 Historical Schedulers
12.3 Using the Scheduler API
12.4 Example: Adding a New Scheduler
12.5 Summary

Chapter 13: HVM Support
13.1 Running Unmodified Operating Systems
13.2 Intel VT-x and AMD SVM
13.3 HVM Device Support
13.4 Hybrid Virtualization
13.5 Emulated BIOS
13.6 Device Models and Legacy I/O emulation
13.7 Paravirtualized I/O
13.8 HVM Support in Xen

Chapter 14: Future Directions
14.1 Real to Virtual, and Back Again
14.2 Emulation and Virtualization
14.3 Porting Efforts
14.4 The Desktop
14.5 Power Management
14.6 The Domain 0 Question
14.7 Stub Domains
14.8 New Devices
14.9 Unusual Architectures
14.10 The Big Picture

Appendix: Porting Cheat Sheet

Index