PCI passthrough without VT-d support

In an attempt to build another home Xen tower, I configured a Dom0 on an older tower. Problem was, PCI passthrough wouldn’t work, despite the CPU supporting VT-x.

From the Unix & Linux Stack Exchange:

Since version 3.0, Xen has provided PCI passthrough to a paravirtual (PV) guest without VT-d CPU/Motherboard extensions.

I’d noticed my PV instances not having this problem.

Xen cannot provide PCI passthrough to a HVM (fully virtualized) guest without VT-d.

And there’s the issue. My Core 2 Duo CPU has VT-x, but not VT-d. Bottom line, if we’re using PV, there may still be some life in our older towers. Otherwise, we’ll have to shell out for some newer hardware.

Still hard to believe a machine I built in the Core 2 Duo days is already considered old. The march of progress…


This is one of about 5000 posts on Rubénerd. View the home page for the latest, or related posts also tagged with:

If you liked this post, feel free to buy me a coffee, leave me a comment on Twitter, or email me at weblog2017@rubenschade.com. Thanks :).