1. Source download
$ git clone git://git.qemu.org/qemu.git
2. Build tool install
$ sudo apt-get install pkg-config zlib1g-dev libglib2.0-dev libsdl1.2-dev
or
$ apt-get build-dep qemu
3. Compile
$ cd ${qemu dir} $ ./configure --enable-debug --target-list="x86_64-softmmu" --enable-kvm $ sudo make $ sudo make install