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

[Ferdinand Nölscher <ferdinand@xxxxxxxxxxx>]

On 10/06/2013 04:38 PM, Sander Eikelenboom wrote:
> 
> Sunday, October 6, 2013, 3:09:54 PM, you wrote:
> 
>> On 10/06/2013 02:58 PM, Andrew Cooper wrote:
>>> 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
>>> 
>>> 
> 
> Ah it seems i got the id's mixed up :-)
> 
> ivrs_ioapic[9]=00:00.1 ivrs_ioapic[10]=00:14.0
> 
> Should do it i guess .. or should the ioapic handle be in hex ..
> (then the last should be ivrs_ioapic[a]=00:14.0 )
> 
> -- Sander
> 

Booting with this parameters I can see "I/O Virtualisation Enabled"
but shortly after that, I get a CPU Panic:

Xen Call Trace:
amd_iommu_ioapic_update_ire ...
iommu_update_ire_from_apic ...
set_ioapic_affinity_irq ...
smp_cpus_done ...
__start_xen ...

Panic on CPU 0:
Assertion "get_rte_index(rte) == offset" failed at iommu_intr.c:188

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