I'm trying to get VT-d working with Linux and so far have been unsuccessful. I've enabled it in the BIOS and the machine boots fine until I pass the intel_iommu=on parameter to the kernel via grub. The machine will never fully boot and the console is filled with this:
DRHD: handling fault status reg 102
DMAR:[DMA Read] Request device [00:1e:0] fault addr e763e000
DMAR: [fault reason 06] PTE read access is not set
with the reg incrementing 2, 102, 202 etc. through 702 and then it starts over. I then have to reset the box and disable VT-d in the BIOS to get it to boot again. Changing intel_iommu to soft or igfx_off will allow the machine to boot but dmesg shows this for all the devices DMAR finds:
DMAR: Device scope device [0000:00:0a.00] not found
I've tried three different Linux distros, all with the same results, as well as many of the intel_iommu and iommu kernel parameters. Next step is to pull the SCSI card, but since that's what I want to pass through to the VM, that kinda defeats the purpose.
Has anybody figured out how to get this to work on this platform with Linux?
thanks--
--jim
