Re: [Xen-devel] IOMMU and AMD 890fx

[Joop Boonen <joop_boonen@xxxxxx>]

I've just got the Biostar mainboard.

I can cant find any option for enabling IOMMU.

When i check via:
ls /sys/firmware/acpi/tables/
APIC  DSDT  FACP  FACS  HPET  MCFG  OEMB  SRAT  SSDT  dynamic

dmesg |grep -i iommu

lspci -d 1002:5a23

I don't see any traces of IOMMU.

I'm going to contact Biostar about this, I hope I can per sway them to
enable IOMMU.

Regards,

Joop.


On 06/15/2010 11:37 PM, Joop Boonen wrote:
> I've got the following answer from Biostar in respect to the Biostar
> TA890FXE main board.
> http://www.biostar.com.tw/app/en/mb/introduction.php?S_ID=482
>
> <quote>
> The motherboard supports IOMMU, but the CPU you are installing also must
> support IOMMU.
>
>
>
> support@xxxxxxxxxxxxxxx
> 626-581-1055 menu select 2 
> </quote>
>
>
> I've just took the risk to order this mainboard as the main board is
> relatively cheap and I hope/presume the IOMMU will be supported
> eventually if it's not supported yet.
> I'll update you when I know the result.
> I understood IOMMU is not related to the CPU i.e. IOMMU should also be
> supported when the CPU on the main board is a AMD Phenom II X2 550 Black
> Edition?
>
> On 06/14/2010 03:49 PM, Andre Przywara wrote:
>   
>> Jens Krehbiel-Gräther wrote:
>>     
>>> Hi!
>>>
>>> I now got a Asus Crosshair IV mainboard and here are the outputs
>>> after I enabled the IOMMU option in the bios:
>>>
>>> xen-01:~# ls /sys/firmware/acpi/tables/
>>> APIC  DSDT  dynamic  FACP  FACS  HPET  IVRS  MCFG  OEMB  SRAT  SSDT
>>> xen-01:~# dmesg |grep -i iommu
>>> [    1.691432] AMD-Vi: Enabling IOMMU at 0000:00:00.2 cap 0x40
>>> xen-01:~# lspci -d 1002:5a23
>>> 00:00.2 Generic system peripheral [0806]: ATI Technologies Inc Device
>>> 5a23
>>> xen-01:~#
>>>
>>> So here is the IOMMU of the 890FX. Will go further for testing now..
>>>       
>> Great news, thanks for pursuing that.
>>
>> For the other boards:
>> We have identified an issue and are working on a solution. Stay tuned.
>>
>> Also please note that sometimes board vendors also call the AMD64 GART
>> an IOMMU, so if you have correspondence with them, make sure you are
>> talking about the same thing.
>>
>> Regards,
>> Andre.
>>
>>     
>
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>   


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