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Re: [Qemu-ppc] [Qemu-devel] [PATCH] spapr: skip adding usb keyboard/mous

From: Eric Blake
Subject: Re: [Qemu-ppc] [Qemu-devel] [PATCH] spapr: skip adding usb keyboard/mouse in case of -nodefaults
Date: Thu, 03 Apr 2014 12:32:47 -0600
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.4.0

On 04/03/2014 12:01 PM, Paolo Bonzini wrote:
> Il 03/04/2014 18:56, Nikunj A Dadhania ha scritto:
>> The following commit caused the regression in qemu-system-ppc64
>> 7effdaa3: spapr: Fix return value of vga initialization
>> d44229c5: Fix vga_interface_type for command line argument '-device VGA'
>> Even when -nodefaults was provided, USB Keyboard and Mouse was added
>> to the machine. This breaks libvirt which uses -nodefaults and adds
>> the keyboard and mouse separately. The machine got 2 USB Keyboards
>> and 2 USB Mouses.


> Does libvirt use "-nodefaults -machine usb=true"?  It should create the
> OHCI controller separately instead of using "-machine".

At least with x86 emulation, libvirt prefers '-nodefaults -machine
usb=off -device piix3-usb-uhci'; so I'm assuming libvirt knows how to
directly create the USB devices it needs.

Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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