jserv / kvm-user-x86

A simple userspace program to interact with Linux KVM

A simple userspace program to interact with Linux KVM on x86 hardware containing virtualization extensions (Intel VT or AMD-V).

The work was derived from this article.

Prerequisites

• Intel processor with VT (virtualization technology) extensions or AMD processor with SVM extensions (also called AMD-V)
  • Enable VT or AMD in advance.
• Install Linux kernel headers

sudo apt-get install linux-headers-generic

Build

Simply execute GNU make:

make

There are two files generated:

• kvm-user
• vm.bin

Run

• Enable KVM:

sudo modprobe kvm

• Execute kvm-user

./kvm-user

Sample output:

KVM start run
KVM_EXIT_IO
out port: 0x10, data 0
KVM start run
KVM_EXIT_IO
out port: 0x10, data 1
KVM start run
KVM_EXIT_IO
out port: 0x10, data 2
KVM start run
KVM_EXIT_IO
out port: 0x10, data 3