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

[Ferdinand Nölscher <ferdinand@xxxxxxxxxxx>]

On 10/06/2013 07:45 PM, Sander Eikelenboom wrote:
> 
> Sunday, October 6, 2013, 7:28:03 PM, you wrote:
> 
>> 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
> 
> 
> Hmm, could you check if you can get a recent linux kernel to boot
> on baremetal (so without xen) with the iommu enabled ? (that would
> most certainly require one or both of the ivrs_ioapic overrides as
> well)
> 
> I assumed but don't know for sure, did you previously had
> successfully used the iommu with the
> iommu=no-amd-iommu-perdev-intremap boot option ? And i understand
> you upgraded your bios, if the previous answer was yes .. did you
> try to revert to your previous bios version ?
> 
> Also added Jan and Suravee to the CC.
> 
> -- Sander
> 
> BTW: please keep everyone that was in the CC listed in replies.
> 
> 
> _______________________________________________ Xen-devel mailing
> list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
> 
> 

What "recent" version? Currently, I'm using 3.10-3, is that ok?

I have used iommu successfully before they added the new checking
stuff, so I can't tell for sure.
I just tried the new xen version because it kept panicking after some
changes half a year ago. Now it's working again but without iommu.
That's why I updated my bios, sadly, without any success.

I'll try booting with Andrews patch now.

kind regards

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