linux-kernel - [ANNOUNCE] Native Linux KVM tool

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Date:	Thu, 31 Mar 2011 20:30:56 +0300
From:	Pekka Enberg <penberg@...nel.org>
To:	linux-kernel@...r.kernel.org
Cc:	aarcange@...hat.com, avi@...hat.com, mtosatti@...hat.com,
	kvm@...r.kernel.org, joro@...tes.org, penberg@...helsinki.fi,
	asias.hejun@...il.com, gorcunov@...il.com, mingo@...e.hu
Subject: [ANNOUNCE] Native Linux KVM tool

Hi all,

We’re proud to announce the native Linux KVM tool!

The goal of this tool is to provide a clean, from-scratch, lightweight
KVM host tool implementation that can boot Linux guest images (just a
hobby, won't be big and professional like QEMU) with no BIOS
dependencies and with only the minimal amount of legacy device
emulation.

Note that this is a development prototype for the time being: there's no
networking support and no graphics support, amongst other missing
essentials.

It's great as a learning tool if you want to get your feet wet in
virtualization land: it's only 5 KLOC of clean C code that can already
boot a guest Linux image.

Right now it can boot a Linux image and provide you output via a serial
console, over the host terminal, i.e. you can use it to boot a guest
Linux image in a terminal or over ssh and log into the guest without
much guest or host side setup work needed.

1. To try out the tool, clone the git repository:

  git clone git://github.com/penberg/linux-kvm.git

or alternatively, if you already have a kernel source tree:

  git checkout -b kvm/tool
  git pull git://github.com/penberg/linux-kvm.git

2. Compile the tool:

  cd tools/kvm && make

3. Download a raw userspace image:

  wget http://wiki.qemu.org/download/linux-0.2.img.bz2 && bunzip2
linux-0.2.img.bz2

4. Build a kernel with CONFIG_VIRTIO_BLK=y and
CONFIG_SERIAL_8250_CONSOLE=y configuration options. Note: also make sure
you have CONFIG_EXT2_FS or CONFIG_EXT4_FS if you use the above image.

5. And finally, launch the hypervisor:

  ./kvm --image=linux-0.2.img --kernel=../../arch/x86/boot/bzImage

The tool has been written by Pekka Enberg, Cyrill Gorcunov, and Asias
He. Special thanks to Avi Kivity for his help on KVM internals and Ingo
Molnar for all-around support and encouragement!

See the following thread for original discussion for motivation of this
project:

http://thread.gmane.org/gmane.linux.kernel/962051/focus=962620

			Pekka

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