Re: [Patch RFC 1/4] usb: support device specification via <bus>-<port>

[Juergen Gross <jgross@suse.com>]

On 07/17/2015 10:28 AM, Gerd Hoffmann wrote:
> On Fr, 2015-07-17 at 09:32 +0200, Juergen Gross wrote:
>> On 07/17/2015 08:59 AM, Gerd Hoffmann wrote:
>>> On Do, 2015-07-16 at 17:47 +0200, Juergen Gross wrote:
>>>> Today a host usb device can be specified either via <vendor>:<product>
>>>> or via <bus>.<device> syntax. Add the possibility to specify it via
>>>> <bus>-<port> as this is needed for the support of xen pvusb backend.
>>>
>>> -device usb-host,hostbus=<bus>,hostport=<port> should already do what
>>> you want.
>>
>> The problem is I have to add the device while qemu is already running,
>> so I'm using usb_host_device_open(). To be able to specify the device
>> via <bus>-<port> I have to add the capability to find the device by
>> those parameters.
>>
>> I haven't found another way to achieve this.
>
> device_add monitor command.

Okay. I guess the USBDevice for the added device can be obtained
in USBPortOps->attach via USBPort->dev ?

Doing a quick search through the sources I couldn't find a way to
issue a monitor command from inside qemu. I assume I'd have to use
do_device_add() directly?


Juergen