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Re: [libvirt] attach-device error: XML error: unknown device type



On 07/03/2013 10:21 AM, Daniel P. Berrange wrote:
> On Wed, Jul 03, 2013 at 04:19:01PM +0200, Michal Privoznik wrote:
>> On 03.07.2013 15:59, Daniel P. Berrange wrote:
>>> On Wed, Jul 03, 2013 at 07:54:51AM -0600, Eric Blake wrote:
>>>> On 07/03/2013 07:46 AM, Daniel P. Berrange wrote:
>>>>>> What am I doing wrong with the virsh attach-device command or XML?
>>>>>
>>>>> There is no support for hotplug of any character device (that
>>>>> covers serial, parallel, console, channnel elements in the XML)
>>>>
>>>> Although that's about to change in libvirt 1.1.1:
>>>> https://www.redhat.com/archives/libvir-list/2013-July/msg00125.html
>>>
>>> Yes & no. Yes, libvirt will support hotplug, but that's only actually
>>> going to work for devices which are PCI based. eg virtio-serial and
>>> virtio-console. You can't hotplug <serial> or <paralle> devices which
>>> use the ISA bus, which is what Chris was trying todo here.
>>
>> But that's just a QEMU limitation. If QEMU learns to hotplug a device
>> onto ISA bus, libvirt will allow it.
> 
> Did real ISA buses ever support hotplug ?  I thought hotplug only came
> along when PCI buses arrived. I'm rather doubting anyone is going to do
> work for ISA device hotplug in QEMU
> 
> Daniel
> 

IIRC they did not, I don't think PCI supported it even until later
revisions.  Even when it did, I only saw it on fairly big hardware and
with specific devices.  Either way, I'm concerned about the error
message here, not that it doesn't work :D

-- 
Chris Evich, RHCA, RHCE, RHCDS, RHCSS
Quality Assurance Engineer
e-mail: cevich + `@' + redhat.com o: 1-888-RED-HAT1 x44214


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