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Re: [Qemu-discuss] No USB host controller and devices on virtualized gue

From: Peter Maydell
Subject: Re: [Qemu-discuss] No USB host controller and devices on virtualized guest OS (on Arndale board)
Date: Thu, 5 Feb 2015 10:15:59 +0000

On 5 February 2015 at 09:51, Eric Valette <address@hidden> wrote:
> This is a pity :
> KVM -> Cortex A15 (ok or A17 or A57) -> Host A15 -> Guest A15 -> NO USB

Right, but USB devices aren't a very common use case for servers,
which is what KVM has been primarily targeting.

> And seen in the doc the way you should pass the USB keyboard or Mouse to the
> guest (which only emulates PS2), I'm wondering if you can get any input from
> the graphic window (not even speaking about X11 at first, even command
> line..).

This should definitely work. I don't seem to have a vexpress-a15
image with the pl050 support compiled in at the moment, but
I tested with versatilepb and vexpress-a9 images (which both
use the same pl050 keyboard/mouse setup as the vexpress-a15)
and keyboard input works fine.

> We manage to get the prompt on the tty1 console in the graphic
> windows, by sending via monitor sendkey ctr-alt-f1 but do not manage to have
> any input there.

This sounds like something is broken (maybe a guest misconfiguration?
maybe a qemu bug?) but it has nothing to do with USB. The graphic
window console just takes key input from your host OS (like any
other window in your host OS) and sends it to the guest keyboard
and mouse, which in this case is PS/2.

-- PMM

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