[SLOF] Keyboard not working when using XHCI as a USB host controller?

[Alexey Kardashevskiy]

On 08/04/2015 09:32 PM, Thomas Huth wrote:
>
>   Hi!
>
> When I use the following command line to start a guest:
>
>   qemu-system-ppc64 -machine pseries,accel=kvm,usb=off \
> 	-device pci-ohci,id=usb,bus=pci.0,addr=0x2 \
> 	-device usb-kbd,id=input0 -nographic -vga none
>
> ... SLOF correctly discoveres a keyboard during USB scan:
>
>   Scanning USB
>     OHCI: initializing
>       USB Keyboard
>   ...
>   0 > devalias
>   keyboard : /pci at 800000020000000/usb at 2/usb-keyboard at 1
>   usb0 : /pci at 800000020000000/usb at 2
>   ...
>
> However, when I start with an XHCI (or EHCI) controller
> instead:


Sure about EHCI?

./qemu-system-ppc64 -machine pseries,accel=kvm,usb=off -device 
usb-ehci,id=usb,bus=pci.0,addr=0x2 -device usb-kbd,id=input0 -nographic 
-vga none

...
Populating /pci at 800000020000000
                      00 1000 (D) : 8086 24cd    serial bus [ usb-ehci ]
No NVRAM common partition, re-initializing...
Scanning USB
   EHCI: Initializing
     USB Keyboard
...
0 > devalias
keyboard : /pci at 800000020000000/usb at 2/usb-keyboard at 1
usb0 : /pci at 800000020000000/usb at 2
...

and "info qtree" is saying there is just a single USB host which is EHCI 
and no OHCI around.


>
>   qemu-system-ppc64 -machine pseries,accel=kvm,usb=off \
> 	-device nec-usb-xhci,id=usb,bus=pci.0,addr=0x2 \
> 	-device usb-kbd,id=input0 -nographic -vga none
>
> ... SLOF does not discover any keyboard:
>
>   Scanning USB
>     XHCI: Initializing
>    ...
>   0 > devalias
>   usb0 : /pci at 800000020000000/usb at 2
>   ...
>
> Is this supposed to work? Am I doing something wrong?


I'd say it is and we got a bug here.




-- 
Alexey