Truenas 12.0-U1 - PCI Passthrough AMD Ryzen no DMAR/IOMMU

[Dekkars]

Hi All,

I'm having an issue passing a USB PCI card through to a VM. When I try, it says 'IOMMU support is required'.

I've been running off of these instructions: https://wiki.freebsd.org/bhyve/pci_passthru

When I run:
acpidump -t | grep DMAR

I get nothing. Except don't Ryzen CPUs have Vt-d/SMR support? Am I missing something?

Thanks

 

[Dekkars]

Just to answer my own question, you need to go to tunables an add as a loader hw.vmm.amdvi.enable=1 and it worked. Hopefully help someone else!

 

[Dargos]

yes, it's help

 

[bbmk859]

Do I have my tunables setup correctly?

I get nothing when I grep DMAR still

Thanks!

 

[Gh0stShell]

I have the same problem as bbmk859

 

[Gh0stShell]

I have the same problem as bbmk859

I just found out, that you dont get an output with grep DMAR.