On 09/06/2016 07:35 AM, Gerd Hoffmann wrote:
While talking about integrated devices: There is docs/q35-chipset.cfg,
which documents how to mimic q35 with integrated devices as close and
complete as possible.
Usage:
qemu-system-x86_64 -M q35 -readconfig docs/q35-chipset.cfg $args
Side note for usb: In practice you don't want to use the tons of
uhci/ehci controllers present in the original q35 but plug xhci into one
of the pcie root ports instead (unless your guest doesn't support xhci).
I've wondered about that recently. For i440fx machinetypes if you don't
specify a USB controller in libvirt's domain config, you will
automatically get the PIIX3 USB controller added. In order to maintain
consistency on the topic of "auto-adding USB when not specified", if the
machinetype is Q35 we will autoadd a set of USB2 (uhci/ehci) controllers
(I think I added that based on your comments at the time :-). But
recently I've mostly been hearing that people should use xhci instead.
So should libvirt add a single xhci (rather than the uhci/ehci set) at
the same port when no USB is specified?
