Fatal PCIe error 928 on KVM GPU Passthrough

Mario Ceresa mrceresa at gmail.com
Wed Jun 19 14:42:30 UTC 2013

Dear all,
does anybody know if it is currently possible to do GPU passthrough in kvm?
I have access to a dual Quadro 4000 setup and I would like to pass the
second one to kvm for use in a VM.

I read a lot on internet and it seems feasible [1, 2, 3] and there is even
a reported success case [5].

However when I start the VM the host reboots with PCIe error 928:
Completion timeout.

My current setup is:

* Fedora 18 with 3.9.4-200 x86_64
* dmesg | grep -e DMAR -e IOMMU shows that they are both enabled
* nvidia driver installed from rpmfusion
* I use vfio assignment as per [4]

Thanks and regards,


[1] http://www.linux-kvm.org/page/VGA_device_assignment
[2] https://bbs.archlinux.org/viewtopic.php?id=162768
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