Re: [Xen-devel] AMD IOMMU disabled - No Perdev Intremap

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

On 06/10/2013 13:56, Ferdinand Nölscher wrote:
> Hi Sander,
>
> Thanks for your reply.
>
> On 10/06/2013 02:10 PM, Sander Eikelenboom wrote:
>> Sunday, October 6, 2013, 1:36:33 PM, you wrote:
>>
>>> Hi!
>>>> From other people posting to this list, I know that there has
>>>> been a
>>> bug related to the issue described in Xen Security Advisory 36
>>> that disables iommu for some AMD users like me.
>> What motherboard do you have ?
> I have an ASUS M5A99X EVO Rev 1.01
>
>
>> It depends if it's the north or southbridge ioapic but try using
>> the new xen boot parameter: (add it to the xen.gz line in grub)
>>
>> ivrs_ioapic[0]=00:14.0
>>
>> or
>>
>> ivrs_ioapic[0]=00:00.1
> I tried both, it still fails to enable i/o virtualisation.

Can you post a full xl dmesg, booting with iommu=debug,verbose as well?

~Andrew

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