[ovirt-users] USB

[Martin Polednik]

----- Original Message -----
> From: "Nisim Simsolo" <nsimsolo at redhat.com>
> To: biholcomb at l1049h.com
> Cc: users at ovirt.org
> Sent: Sunday, May 15, 2016 1:40:07 PM
> Subject: Re: [ovirt-users] USB
> 
> Hi
> 
> You can attach host device directly from virtual machines tab -> select VM
> -> host devices sub tab -> "add device" button.
> 
> But first you need to verify your BIOS is supporting intel VT-d or AMD vi.
> And you also need to activate it in the kernel. The next link describes how
> to do it:
> https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/Virtualization_Deployment_and_Administration_Guide/chap-Guest_virtual_machine_device_configuration.html#sect-Guest_virtual_machine_device_configuration-PCI_devices
> 
> note: Instead of adding "intel_iommu=pt" in the grub cmdline, add
> "intel_iommu=on" or "amd_iommu=on".
> 
> Another thing worth mentioning, USB hotplug is not supported yet, so if
> your programmable device is resetting the USB connection each time you
> program it, the USB will be detached from the VM and you will have to
> attach it again in order to see it.

USB passthrough does not require IOMMU, only PCI devices do. The docs need
improvement in that regard.
 
> On Sun, May 15, 2016 at 8:34 AM, Brett I. Holcomb <biholcomb at l1049h.com>
> wrote:
> 
> > How do I get a VM to see USB devices?  If I understand it correctly I
> > have to go to Edit VM -> Console and enable USB native.  I have the
> > console options set to use usb.  However, I'm finding conflicting
> > information.  Supposedly libvirt will allow sharing of a USB device
> > over a network but to start with I'd be happy just being able to
> > connect a usb device to the host and having it detected.  I have some
> > programmable devices I'd like to program in Linux using my VM.
> >
> > Has anyone uses usbip and if so how well does  it work?
> >
> >
> > _______________________________________________
> > Users mailing list
> > Users at ovirt.org
> > http://lists.ovirt.org/mailman/listinfo/users
> >
> 
> 
> 
> --
> Nisim Simsolo
> QE -Testing Engineer
> IRC: nsimsolo
> int phone - 8272305
> mobile - 054-4779934
> 
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