Comment 9 for bug 1276719

Hi i also follow this topic but for me the proposed libvirt doesn't seem to solve the problem. When starting the virtual machine i still get a permission denied error.

If i bind the device from command line and run qemu from command line all works fine.
I converted the working command line to virsh and the difference that i see is vfio-pci are command line arguments in the xml :

<qemu:commandline>
    <qemu:arg value='-rtc'/>
    <qemu:arg value='base=localtime'/>
    <qemu:arg value='-device'/>
    <qemu:arg value='ioh3420,bus=pcie.0,addr=1c.0,multifunction=on,port=1,chassis=1,id=roo try t'/>
    <qemu:arg value='-device'/>
    <qemu:arg value='vfio-pci,host=04:00.0,bus=root,addr=00.0,multifunction=on,x-vga=on'/>
    <qemu:arg value='-device'/>
    <qemu:arg value='vfio-pci,host=04:00.1,bus=root,addr=00.1'/>
    <qemu:arg value='-device'/>
    <qemu:arg value='ide-cd,bus=ide.1,unit=0,drive=drive-ide0-1-0,id=ide0-1-0,bootindex=1'/>
  </qemu:commandline>

When i start the vm in virt manager i get this message :

internal error: early end of file from monitor: possible problem:
qemu-system-x86_64: -device vfio-pci,host=04:00.0,bus=root,addr=00.0,multifunction=on,x-vga=on: vfio: error opening /dev/vfio/17: Permission denied
qemu-system-x86_64: -device vfio-pci,host=04:00.0,bus=root,addr=00.0,multifunction=on,x-vga=on: vfio: failed to get group 17
qemu-system-x86_64: -device vfio-pci,host=04:00.0,bus=root,addr=00.0,multifunction=on,x-vga=on: Device initialization failed.
qemu-system-x86_64: -device vfio-pci,host=04:00.0,bus=root,addr=00.0,multifunction=on,x-vga=on: Device 'vfio-pci' could not be initialized

Traceback (most recent call last):
  File "/usr/share/virt-manager/virtManager/asyncjob.py", line 96, in cb_wrapper
    callback(asyncjob, *args, **kwargs)
  File "/usr/share/virt-manager/virtManager/asyncjob.py", line 117, in tmpcb
    callback(*args, **kwargs)
  File "/usr/share/virt-manager/virtManager/domain.py", line 1162, in startup
    self._backend.create()
  File "/usr/lib/python2.7/dist-packages/libvirt.py", line 866, in create
    if ret == -1: raise libvirtError ('virDomainCreate() failed', dom=self)
libvirtError: internal error: early end of file from monitor: possible problem:
qemu-system-x86_64: -device vfio-pci,host=04:00.0,bus=root,addr=00.0,multifunction=on,x-vga=on: vfio: error opening /dev/vfio/17: Permission denied
qemu-system-x86_64: -device vfio-pci,host=04:00.0,bus=root,addr=00.0,multifunction=on,x-vga=on: vfio: failed to get group 17
qemu-system-x86_64: -device vfio-pci,host=04:00.0,bus=root,addr=00.0,multifunction=on,x-vga=on: Device initialization failed.
qemu-system-x86_64: -device vfio-pci,host=04:00.0,bus=root,addr=00.0,multifunction=on,x-vga=on: Device 'vfio-pci' could not be initialized

Any idea ?

Thanks