Need IOMMU Help

Operating Systems & Open Source Linux
1

Hey everyone, I have an RX 550 as a host on Ubuntu 17.04 with a GTX 1070 as the guest GPU for Windows 10.

I have a Asus Sabertooth X79 MOBO and i7 4930k, which has vt-d support.

  • I have intel_iommu=on set in grub.

  • My GTX 1070 is set to use pci-stub as it's drivers.

  • In the Asus BIOS, 'Intel Virtualization Technology' is enabled, BIOS is up to date.

When I run dmesg | grep -e DMAR -e IOMMU

result:
[ 0.000000] DMAR: IOMMU enabled
[ 1.343259] AMD IOMMUv2 driver by Joerg Roedel [email protected]
[ 1.343259] AMD IOMMUv2 functionality not available on this system

Yet when I start the installation on virt-manager, I get this error as seen in screenshot.

Not sure what I'm missing here, any thoughts would be great. Thanks.

Here's the error under details.
Traceback (most recent call last):
File "/usr/share/virt-manager/virtManager/asyncjob.py", line 90, in cb_wrapper
callback(asyncjob, *args, **kwargs)
File "/usr/share/virt-manager/virtManager/create.py", line 2277, in doasync_install
guest.start_install(meter=meter)
File "/usr/share/virt-manager/virtinst/guest.py", line 501, in start_install
noboot)
File "/usr/share/virt-manager/virtinst/guest.py", line 416, in createguest
dom = self.conn.createLinux(start_xml or final_xml, 0)
File "/usr/lib/python2.7/dist-packages/libvirt.py", line 3491, in createLinux
if ret is None:raise libvirtError('virDomainCreateLinux() failed', conn=self)
libvirtError: unsupported configuration: host doesn't support passthrough of host PCI devices

2

Vtd is a separate option as virtualization. Make sure both are on

3

Not seeing one, but according to the grey text in this picture, it says it's supported.

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4

its probably in another menu. Is this the latest uefi for this board?

there are reports of early sabertooth uefi hiding the vt-d option, which was supposed to be fixed at some point

5

I saw that too in various forums as I was troubleshooting.

I was on BIOS version 4801, the latest (albeit beta) version. Rolled back to 4701 which is the latest stable, both seems to have it hidden.

I've looked in other menus a fair bit, not seeing it, will keep looking.

I may just need to contact ASUS.

6

try 4608, just found a screenshot from that uefi and the option is there.

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7

Just installed 4608, and it was in another menu.

Not sure if I missed it from before or not.

It's under Advanced/System Agent Configuration, and not Advanced/CPU configuration as was the standard virtualization option.

Thanks Wendell!

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