[virt-tools-list] Adding custom device to virt-manager

Cole Robinson crobinso at redhat.com
Tue Aug 11 17:39:34 UTC 2015

On 08/11/2015 01:12 PM, Anish Mathew wrote:
> Cole,
> I am adding a PCIe accelerator with CPUs and a NIC.
> Is there any plan to change the procedure for users to add virt-manager UI
> support for a device without code change?

No, that won't change. Extending the app will always require code change... I
can't imagine how we would even make it work without changing code.

> My concern is that as new libvirt source changes are released, I have to
> maintain one or more patches.

You won't need to maintain patches if you get them upstream...

- Cole

> On 8/9/2015 11:23 AM, Cole Robinson wrote:
>> On 08/07/2015 11:51 AM, Anish Mathew wrote:
>>> Hello,
>>> I am adding a custom PCI device to virt-manager. I have edited
>>> virt-manager source (addhardware.py ,__init__.py ,addhardware.ui, device.py)
>>> so the custom device will appear in "Add Hardware" window of virt-manager.
>>> Now it looks like I have to edit libvirt qemu capabilities
>>> (qemu_capabilities.c libvirt.c)
>>> to support the device. Is this the right procedure for adding custom devices?
>>> I was expecting to edit an XML file or other config file rather than source
>>> code.
>>> Is there any plan to change this procedure for adding custom devices?
>> What is the device you are trying to add?
>> If you are just trying to attach a device to a libvirt VM, use 'sudo virsh
>> edit $vmname' and add your XML
>> But if you are trying to extend virt-manager to have UI support for a device
>> type that it does not already support, you will need to edit code like you say.
>> What device are you trying to add?
>> - Cole
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