[vfio-users] Patching qemu from fedora-virt-preview repo ?

[thibaut noah]

Hi, i have installed virt tools by adding the fedora-virt-preview repo as
described in alex's blog when i first did my system installation (opening
my own issue for better clarity).

Doing so actually installed a lot of packages but i am a little perplex
here.
Checking available packages from the repo i see that there is a
qemu-2:2.5.0-6.fc23.x86_64 package which is not installed.
In installed packages i have :
qemu-system
qemu-guest-agent
qemu-kvm
qemu-img
qemu-common

I might be mistaken but is it possible that qemu-common are just files
needed by all qemu packages and that by using libvirt i never really used
qemu from the start?

If so and considering i actually never installed any packages myself for
virtualization (only adding repo and updating system) do i have to install
qemu-2 manually because this is the one to patch?

I managed to enable fedora-virt-preview-source which is listed in the same
repo as fedora-virt-preview and in there i can find rpm packages :
https://fedorapeople.org/groups/virt/virt-preview/fedora-23/rpms/

Question is where do i got from there?
Do i download qemu rpm manually (by clicking on it in my browser) and patch
it?

Seems by this link :  http://bradthemad.org/tech/notes/patching_rpms.php
that the process to patch a rpm is similar as patching a kernel, mainly
creating folder, downloading source, patch it and recompile.

I'm just afraid to do so considering i'm not sure this is what i'm suppose
to do.
If this is the right way i assume using rpmbuild at the end of the process
will automatically install it and i'm done?

Any insight from a fedora user would be appreciated, also bear in mind that
i tend to be a noob regarding linux and if you go too much into some
details that might look like chinese to me.
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