[vfio-users] Emulated VGA and real card running in parallel

[Nick Sukharev]

I managed to configure i7-5820K / Asrock x99 Extreme 4 / 3 different
radeons (R9 270, R9 270x and R7 240) for passthrough and I am pretty sure I
can even put a 4th card there if I need to. It only works properly with
UEFI bios in QEMU and I used stock Ubuntu 15.05 for everything except the
UEFI bios that I recompiled from source.

I have several VMs, one for each card and I start them with emulated
graphics also enabled. This allows me to use the emulated keyboard/mouse
without any need to pass USB devices as well. The way it works now:
1) I start a vm via CLI. It displays "Starting WIndows" in the emulated
window
2) In a few seconds it switches to the second display connected to the
passthrough card.
I can still use the emulated window to grab/release mouse and keyboard
focus and it works pretty well for what I am using it for.

For my host graphics I am using DisplayLink USB adapter to make all PCIE
cards available for passthrough.

Here is the question I have: the emulated graphcs card gets disabled as
soon as the real card driver kicks in. Is it somehow possible to leave it
functional so that I can have a second virtual monitor in the window for my
VM?
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