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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

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

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://

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

git checkout -b kvm/tool
git pull git://

2. Compile the tool:

cd tools/kvm && make

3. Download a raw userspace image:

wget && bunzip2

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


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