So in principle they would like to support it , but they can't / don't know how.
Very interested at AMD's answer then, unfortunately Wei Huang seems to be on
vacation until June 7th.
For what i understood in the past was that AMD's solution would not depend on
cpu support (as intel's vt-d does).
And with vga passthrough, iommu on the desktop looks like a good use of an
iommu in my opinion.
--
Sander
Thursday, June 3, 2010, 12:51:23 PM, you wrote:
> I got this answer from asrock support:
> <answer>
> So, I get more/final answer from Taiwan department:
> For H/W part:
> From chipset spec, RD890(890FX) did support IOMMU.
> But IOMMU also need CPU to support. Till now, AMD has no plan to support
> IOMMU on desktop CPU (AM3 socket).
> It only support with server CPU.
> For BIOS part:
> AMD has removed IOMMU related registers.
> So there is no chance to let IOMMU work on our 890FX board unless AMD can
> provide such a process, and registers.
> Best regards,
> ASRock Support
> </answer>
> So they say it is AMD's fault. :-(
> Regards,
> Jens
> On Thu, 3 Jun 2010 11:23:10 +0200, Sander Eikelenboom
> <linux@xxxxxxxxxxxxxx> wrote:
>> Thursday, June 3, 2010, 10:53:29 AM, you wrote:
>>
>>> The ASRock 890FX Deluxe3 doesn't support the IOMMU technology too.
>>> http://forums.amd.com/forum/messageview.cfm?catid=383&threadid=134410
>>
>>> I'm very disappointed that main board manufacturers don't enable all
>>> features for the processor and main board.
>>
>>
>>> On Thu, June 3, 2010 10:19 am, Sander Eikelenboom wrote:
>>>> Thx for the forum threads, i have changed the wiki about vt-d/iommu to
>>>> reflect these new experiences.
>>>>
>>>> I was hoping AMD would be able to do a better job than Intel, and have
>>>> learned from the BIOS missery Intel has with there VT-d, and
>>>> instruct/help
>>>> the manafacturers getting their bioses right.
>>
>>> I have a feeling that it's not AMD but the main board manufacturers who
>>> don't enable IOMMU in the BIOS. (It might be a hidden feature, for
> people
>>> who want to hack the BIOS at your own risk).
>>> http://www.rebelshavenforum.com/sis-bin/ultimatebb.cgi
>>
>> Ofcourse you are right, but as chipset manufacturer I would be pretty
>> pissed and contact them.
>> Also I don't know how hard AMD and Intel make it to implement the
> feature
>> in the bios. Since most of the time it's or disabled or broken.
>> On the other hand, they only support "microsoft windows" and that
> doesn't
>> do a lot with an IOMMU. So in essence it's an unsupported feature.
>>
>> It's too bad though, it seemed to be a very nice virtualization
> platform,
>> 6 cores, iommu, affordable ...
>>
>> Hmm guess i'm going to write every manufacturer if they supported,
> and/or
>> if there are plans to support it.
>> Hopefully one will do it in the end ...
>>
>> --
>> Sander
>>
>>>> It's a pity that a nice feature isn't supported. No sense in upgrading
>>>> my
>>>> setup then to a six core and mobo with IOMMU. :(
>>>>
>>>>
>>>> --
>>>> Sander
>>>>
>>>>
>>>>
>>>>> Gigabyte motherboards don't support IOMMU:
>>>>>
> http://forums.tweaktown.com/f69/ga-890fxa-ud5-iommu-bios-switch-39801/
>>>>
>>>>> MSI boards have the same problems:
>>>>> http://comments.gmane.org/gmane.comp.emulators.xen.user/58630
>>>>
>>>>> ASUS Crosshair IV Formula has IOMMU, but I cannot find if it works
> with
>>>>> Xen.
>>>>
>>>>
>>>>
>>>>
>>>>> On Sun, May 9, 2010 at 11:38 PM, Sander Eikelenboom
>>>>> <linux@xxxxxxxxxxxxxx>wrote:
>>>>
>>>>>> Hello Wei,
>>>>>>
>>>>>> I hope motherboard manufacturers do a better job with supporting
> this
>>>>>> iommu
>>>>>> in the bios than they did with intel's. Especially Asus made a mess
> of
>>>>>> it,
>>>>>> and hasn't fixed it in newer bioses for multiple motherboards.
>>>>>> And since all motherboard reviews don't mention nor test the iommu
>>>>>> it's
>>>>>> hard to know upfront if it's supported :-(
>>>>>>
>>>>>> --
>>>>>>
>>>>>> Sander
>>>>>>
>>>>>> > Leonardo,
>>>>>>
>>>>>> > I can confirm that AMD 890FX supports IOMMU v1.22. It was briefly
>>>>>> mentioned by external sites, such as
>>>>>> http://techreport.com/articles.x/18825. It looks like Asus, Gigabyte
>>>>>> and
>>>>>> MSI will ship motherboards with 890FX chipset. Xen 4.0 fully
> supports
>>>>>> AMD
>>>>>> IOMMU v1.2. Note that IOMMU needs support from BIOS (ACPI IVRS
> table).
>>>>>> Please pay a bit attention to this area.
>>>>>>
>>>>>> > -Wei
>>>>>>
>>>>>> > From: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx [mailto:
>>>>>> xen-devel-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Leonardo
> Prosperi
>>>>>> > Sent: Sunday, May 09, 2010 1:02 PM
>>>>>> > To: xen-devel@xxxxxxxxxxxxxxxxxxx
>>>>>> > Subject: [Xen-devel] IOMMU and AMD 890fx
>>>>>>
>>>>>>
>>>>>> > Hi,
>>>>>> > All the reviews for the AMD 890fx chipset reported that it
> supports
>>>>>> IOMMU
>>>>>> v1.2.
>>>>>> > But I cannot find any mention of that on AMD site.
>>>>>>
>>>>>> > Does 890fx support IOMMU?
>>>>>> > Do 890fx motherboards with IOMMU exist?
>>>>>> > Does Xen support 890fx?
>>>>>>
>>>>>> > Regards,
>>>>>> > Leonardo
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> --
>>>>>> Best regards,
>>>>>> Sander mailto:linux@xxxxxxxxxxxxxx
>>>>>>
>>>>>>
>>>>
>>>>
>>>>
>>>> --
>>>> Best regards,
>>>> Sander mailto:linux@xxxxxxxxxxxxxx
>>>>
>>>>
>>>> _______________________________________________
>>>> Xen-devel mailing list
>>>> Xen-devel@xxxxxxxxxxxxxxxxxxx
>>>> http://lists.xensource.com/xen-devel
>>>>
--
Best regards,
Sander mailto:linux@xxxxxxxxxxxxxx
_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel
|
Home