Re: X58 Virtualization w/ Linux

Steve Novakov
2016-06-14T22:21:31Z

Some more info here from someone having exactly the same problem I am
and at exactly the same stage

http://www.tomshardware.com/answers/id-3049002/socket-1366-iomuu-compatibility-decent.html#18122605

Steve Novakov
B.A.Sc Engineering Physics
PhD Student - Physics
University of Michigan - Ann Arbor
On 6/13/2016 4:11 PM, Steve Novakov wrote:
> Interestingly, when I disable VT-D in the motherboard BIOS. I can boot
> with "intel_iommu=on pci-stub.ids=DEVICEID"
>
> and the DEVICE is successfully loaded by the pci-stub driver,
> according to $lspci -nnk readout
>
> additionally, I see:
>
> $dmesg | grep -e IOMMU
>
> [0.000000] DMAR: IOMMU enabled
>
> even though I actually DISABLED VT-D in the motherboard BIOS. Going
> back now and enabling it in the BIOS causes freezing during boot again.
>
> I'm also having trouble assigning this device to the vfio-pci driver,
> but that might be a separate issue.
>
> Steve Novakov
> B.A.Sc Engineering Physics
> PhD Student - Physics
> University of Michigan - Ann Arbor
> On 6/12/2016 11:32 PM, Steve Novakov wrote:
>> > Usually, i am using intel_iommu=on and everything works well. But
>> in your case, i guess you may also need intremap=off.
>>
>> Passing EITHER "intel_iommu=on intremap=off" OR " "intel_iommu=on
>> vfio_iommu_type1.allow_unsafe_interrupts=1" during boot results in a
>> freeze at boot. This happens at the loading initramfs step ("initrd
>> /boot/initramfs-linux.img").
>>
>> Any further suggestions? Thanks,
>>
>> Steve Novakov
>> B.A.Sc Engineering Physics
>> PhD Student - Physics
>> University of Michigan - Ann Arbor
>>
>>
>>
>