It seems that we need to compile QEMU 3.0.0 manually.
At first we remove version installed from official repository (if any):
sudo apt-get purge "qemu*"
sudo apt-get autoremove
We should start by installing its build-dependencies - at first enable Source Code repositories in Software and Updates (
software-properties-gtk) and then:
sudo apt-get build-dep qemu
Then download it, configure and compile:
tar -xf qemu-3.0.0.tar.xz
and then use
sudo apt-get install checkinstall
sudo checkinstall make install
sudo apt-get install ./*.deb
if you want to remove it - remove its packages as usual.
And as the result you will have QEMU 3.0.0 installed
$ qemu-system-x86_64 --version
QEMU emulator version 3.0.0
Copyright (c) 2003-2017 Fabrice Bellard and the QEMU Project developers