Re: [Xen-users] XEN PCI passthrough

[Mike Lovell <mike@xxxxxxxxxxxx>]

Geoff Gibbs wrote:
> Xen,
>
> I am currently running Xen 3.3 unstable, and I trying to get PCI
> passthrough to work with a Adaptec SAS RAID controller (4805SAS).
>
> I am able to see the device on DomU but the aacraid module fails to
> load with the following message:
>
> aacraid: aac_fib_send: first asymchronous command timeout.
> Ususally the result of a PCI interrupt routing problem; update the
> mother board BIOs or consider utilizing one of the SAFE mode kernel
> options (acpi, apic, etc)
>
> Any ideas would be greatly appreciated. I have looked into adding
> the aacraid card to, xend-pci-quirks.sxp and xend-pci-permissive.sxp,
> but am not sure what the correct parameters I need to use.
While I am certainly not an expert with PCI passthrough, I did get it 
working on a system with the onboard USB controller. I ran into a 
problem where when I would load the USB modules in the guest, the guest 
would hang and I would have to destroy it. The fix that worked for me 
was putting the option 'swiotlb=force' in the 'extra' setting of the 
guest config. I'm not even entirely sure what it does. I found it 
through looking online. It might be worth a try.
Mike

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