[virt-tools-list] pci passthrough fail on fedora 15/kvm/qemu/virt-manager hosting win 7 (all 64 bit)

[Erik Flister]

i found this discussion of the same error:

http://www.linux-kvm.com/content/pci-passthrough-error
> "I've solved my problem by deleting the '.save' file in
> /var/lib/libvirt/qemu/save"

but i don't have that file:

> sudo ls -al /var/lib/libvirt/qemu/save
total 8
drwxr-xr-x 2 qemu qemu 4096 Sep 16 03:22 .
drwxr-x--- 5 qemu qemu 4096 Sep 19 10:13 ..


-erik



>________________________________
>From: erik flister <erik.flister at gmail.com>
>To: virt-tools-list at redhat.com
>Sent: Monday, September 19, 2011 9:19 PM
>Subject: [virt-tools-list] pci passthrough fail on fedora 15/kvm/qemu/virt-manager hosting win 7 (all 64 bit)
>
>AMD phenom II X6 1075T proc
>ASUS M4A87TD mobo
>BIOS ver 2001 (built 3/8/11)
>
>advanced/cpu config/secure virtual machine mode enabled in BIOS
>
>not sure if this turns on iommu, how do i verify?
>
>/proc/cpuinfo has hits for svm but not iommu or vmx.
>
>> dmesg | grep -i iommu
>[    0.000000] Please enable the IOMMU option in the BIOS setup
>[    1.515596] PCI-DMA: using GART IOMMU.
>[    1.515599] PCI-DMA: Reserving 64MB of IOMMU area in the AGP aperture
>
>note my pci cards have windows drivers, but not linux drivers as far as i know.
>
>i have latest yummed kvm/qemu/virt-manager.
>
>i am using this virtualization method:
>http://www.techotopia.com/index.php/Running_Windows_on_Fedora_Using_KVM_Virtualization
>
>i didn't know to disconnect the pci cards from the host before adding
>them to the guest until finding:
>http://docs.fedoraproject.org/en-US/Fedora/13/html/Virtualization_Guide/sect-Virtualization-PCding_a_PCI_device_to_a_host.html
>
>> lspci
>
>02:06.0 Unassigned class [ff00]: National Instruments PCI-6110
>02:07.0 Serial controller: NetMos Technology PCI 9865 Multi-I/O Controller
>02:07.1 Serial controller: NetMos Technology PCI 9865 Multi-I/O Controller
>02:07.2 Parallel controller: NetMos Technology PCI 9865 Multi-I/O Controller
>
>> lspci -n
>
>02:06.0 ff00: 1093:14e0
>02:07.0 0700: 9710:9865
>02:07.1 0700: 9710:9865
>02:07.2 0701: 9710:9865
>
>> virsh nodedev-list | grep pci
>
>pci_0000_02_06_0
>pci_0000_02_07_0
>pci_0000_02_07_1
>pci_0000_02_07_2
>
>> sudo virsh nodedev-dettach pci_0000_02_06_0
>Device pci_0000_02_06_0 dettached
>
>
>but then, after adding it to the guest and trying to boot it, i get:
>
>Error starting domain: this function is not supported by the
>connection driver: Unable to reset PCI device 0000:02:06.0: this
>function is not supported by the connection driver: Active
>0000:02:07.0 devices on bus with 0000:02:06.0, not doing bus reset
>
>Traceback (most recent call last):
>  File "/usr/share/virt-manager/virtManager/asyncjob.py", line 45, in cb_wrapper
>    callback(asyncjob, *args, **kwargs)
>  File "/usr/share/virt-manager/virtManager/engine.py", line 959, in asyncfunc
>    vm.startup()
>  File "/usr/share/virt-manager/virtManager/domain.py", line 1128, in startup
>    self._backend.create()
>  File "/usr/lib64/python2.7/site-packages/libvirt.py", line 330, in create
>    if ret == -1: raise libvirtError ('virDomainCreate() failed', dom=self)
>
>
>
>if i disable the other devices on bus 02 and add them to the guest:
>> sudo virsh nodedev-dettach pci_0000_02_07_0
>Device pci_0000_02_07_0 dettached
>
>> sudo virsh nodedev-dettach pci_0000_02_07_1
>Device pci_0000_02_07_1 dettached
>
>> sudo virsh nodedev-dettach pci_0000_02_07_2
>Device pci_0000_02_07_2 dettached
>
>i then get this error on booting the guest (but with the same stack
>trace as above):
>
>Error starting domain: cannot send monitor command
>'{"execute":"qmp_capabilities"}': Connection reset by peer
>
>and then networking fails on the host until i reboot, and fedora won't
>even shutdown all the way (i have to do a hard reboot by holding down
>the power button).
>
>any idea how i can fix this?  why isn't detaching the device
>automatically done when it is added to the guest?  even if i get this
>working, it seems i will have to detach stuff every time i reboot the
>host?  finally, in this case, i actually do want to give everything on
>bus 02 to the guest, but what if i didn't?
>
>thanks for your help!
>-erik
>
>
>see also iommu/bios stuff here:
>http://docs.fedoraproject.org/en-US/Fedora/13/html-single/Virtualization_Guide/index.html
>
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