I have an MSI-GD65 Gaming motherboard and an Intel i7 4790. VT-D is enabled in the CPU Features section of the bios.
I'm running Ubuntu 14.04.1 LTS and when I try and detach a device, I get the following message:
# virsh nodedev-detach pci_0000_00_1f_2
error: Failed to detach device pci_0000_00_1f_2 error: Operation not supported: neither VFIO nor KVM device assignment is currently supported on this system
Dmesg includes some information about IOMMU but I can't tell if this means that VT-D is enabled
$ dmesg | grep -i iommu
[ 0.027450] dmar: IOMMU 0: reg_base_addr fed90000 ver 1:0 cap c0000020660462 ecap f0101a
[ 0.027455] dmar: IOMMU 1: reg_base_addr fed91000 ver 1:0 cap d2008020660462 ecap f010da
[ 0.027521] IOAPIC id 8 under DRHD base 0xfed91000 IOMMU 1
Can anyone advise what I need to do to enable VT-D on this system and pass through PCI devices to KVM guests please ?