libvirt users - Feb 2017 - Bluetooth Device Support

Hi,

I want to create a virtual hci device on my virtual machine. I have seen
that qemu has options supporting this

https://qemu.weilnetz.de/doc/qemu-doc.html#Bluetooth_0028R_0029-options

and

https://qemu.weilnetz.de/doc/qemu-doc.html#pcsys_005fusb

Is there any support for these options in libvirt? I was not able to find
anything in documentation so I added the qemu command line xml as follows
<qemu:commandline>
    <qemu:arg value='-usbdevice'/>
    <qemu:arg value='bt:hci'/>
    <qemu:arg value='-bt'/>
    <qemu:arg value='hci,host'/>
  </qemu:commandline>

but when I try to run my machine from virt-manager i get the following
error:

Error starting domain: internal error: process exited while connecting to
monitor: 2017-02-28T21:25:51.735987Z qemu-system-x86_64: -device
ich9-usb-ehci1,id=usb,bus=pcie.0,addr=0x1d.0x7: PCI: slot 29 function 7 not
available for ich9-usb-ehci1, in use by ich9-usb-ehci1

this error does not appear if I remove the commandline xml nodes

Does anyone have any guidance for troubleshooting this?

If it helps at all, virsh -v gives 2.1.0, virt-manager about page lists
1.3.2 and qemu-system-x86_64 --help gives 2.6.1 I am running Ubuntu 16.10.

thanks,
Max Ehrlich

On Tue, Feb 28, 2017 at 09:33:16PM +0000, Max Ehrlich
wrote:
> Hi,
> 
> I want to create a virtual hci device on my virtual machine. I have seen
> that qemu has options supporting this
> 
> https://qemu.weilnetz.de/doc/qemu-doc.html#Bluetooth_0028R_0029-options
> 
> and
> 
> https://qemu.weilnetz.de/doc/qemu-doc.html#pcsys_005fusb
> 
> Is there any support for these options in libvirt? I was not able to find
No, libvirt doesn't have explicit support for bluetooh at this time.
> anything in documentation so I added the qemu command line xml as follows
> <qemu:commandline>
>     <qemu:arg value='-usbdevice'/>
>     <qemu:arg value='bt:hci'/>
>     <qemu:arg value='-bt'/>
>     <qemu:arg value='hci,host'/>
>   </qemu:commandline>
> 
> but when I try to run my machine from virt-manager i get the following
> error:
> 
> Error starting domain: internal error: process exited while connecting to
> monitor: 2017-02-28T21:25:51.735987Z qemu-system-x86_64: -device
> ich9-usb-ehci1,id=usb,bus=pcie.0,addr=0x1d.0x7: PCI: slot 29 function 7 not
> available for ich9-usb-ehci1, in use by ich9-usb-ehci1
> 
> this error does not appear if I remove the commandline xml nodes
> 
> Does anyone have any guidance for troubleshooting this?
Libvirt assigns PCI addresses for every device it adds. QEMU will assign
addresses for any device that doesn't have an address present. Your
custom device is missing an address and QEMU is asigning one, unaware that
the address it picks will clash with one assigned by libvirt.

To fix this you probably need to add addressing to your device addition,
but I'm unclear about exactly how the bluetooth devices work in QEMU so
can't give an explicit recommendation


Regards,
Daniel
-- 
|: http://berrange.com      -o-    http://www.flickr.com/photos/dberrange/ :|
|: http://libvirt.org              -o-             http://virt-manager.org :|
|: http://entangle-photo.org       -o-    http://search.cpan.org/~danberr/ :|

Daniel,

Thanks for the reply.

This is pretty much what I had assumed. I would guess that assigning any
free address, or telling qemu to plug the bt device into a controller that
libvirt creates, might work, but I cant find anything in the documentation
for qemu that would assign an address via command line. Do you know how to
do it?

thanks,
Max

On Wed, Mar 1, 2017 at 4:11 AM Daniel P. Berrange <berrange@redhat.com>
wrote:
> On Tue, Feb 28, 2017 at 09:33:16PM +0000, Max Ehrlich wrote:
> > Hi,
> >
> > I want to create a virtual hci device on my virtual machine. I have
seen
> > that qemu has options supporting this
> >
> >
https://qemu.weilnetz.de/doc/qemu-doc.html#Bluetooth_0028R_0029-options
> >
> > and
> >
> > https://qemu.weilnetz.de/doc/qemu-doc.html#pcsys_005fusb
> >
> > Is there any support for these options in libvirt? I was not able to
find
>
> No, libvirt doesn't have explicit support for bluetooh at this time.
>
> > anything in documentation so I added the qemu command line xml as
follows
> > <qemu:commandline>
> >     <qemu:arg value='-usbdevice'/>
> >     <qemu:arg value='bt:hci'/>
> >     <qemu:arg value='-bt'/>
> >     <qemu:arg value='hci,host'/>
> >   </qemu:commandline>
> >
> > but when I try to run my machine from virt-manager i get the following
> > error:
> >
> > Error starting domain: internal error: process exited while connecting
to
> > monitor: 2017-02-28T21:25:51.735987Z qemu-system-x86_64: -device
> > ich9-usb-ehci1,id=usb,bus=pcie.0,addr=0x1d.0x7: PCI: slot 29 function
7
> not
> > available for ich9-usb-ehci1, in use by ich9-usb-ehci1
> >
> > this error does not appear if I remove the commandline xml nodes
> >
> > Does anyone have any guidance for troubleshooting this?
>
> Libvirt assigns PCI addresses for every device it adds. QEMU will assign
> addresses for any device that doesn't have an address present. Your
> custom device is missing an address and QEMU is asigning one, unaware that
> the address it picks will clash with one assigned by libvirt.
>
> To fix this you probably need to add addressing to your device addition,
> but I'm unclear about exactly how the bluetooth devices work in QEMU so
> can't give an explicit recommendation
>
>
> Regards,
> Daniel
> --
> |: http://berrange.com      -o-    http://www.flickr.com/photos/dberrange/
> :|
> |: http://libvirt.org              -o-             http://virt-manager.org
> :|
> |: http://entangle-photo.org       -o-    http://search.cpan.org/~danberr/
> :|
>