Re: [Xen-users] Xen IOMMU disabled due to IVRS table... Blah blah blah

[feral <blistovmhz@xxxxxxxxx>]

I agree entirely about who should be taking responsibility, but we all
know of course, that Asus will never fix this.  There are probably
less than 5000 people in the world affected by this, and if we assume
most of them will still buy Asus's next board that has working IVRS
tables, Asus doesn't care.

I'm more interested in knowing why the
"iommu=no-amd-iommu-perdev-intremap" option doesn't cover my issue
though.  It seems odd to me that this option was implemented precisely
to work around the regression issue, but somehow it didn't catch them
all.  Goddamn I can't wait for the Xen Documentation to take form :)

On Tue, May 28, 2013 at 10:35 AM, Jan Hejl <jh@xxxxxxxxxx> wrote:
> Missing? May be some irony and sarcasm about that "solved". Sure this could 
> be done better in Xen implementation, but primarly ASUS should be the first 
> to take a care. These boards are not cheapest so i suppose that they should 
> work properly. May be i'm wrong.
>
> 28. 5. 2013 v 18:56, feral <blistovmhz@xxxxxxxxx>:
>
>> On Tue, May 28, 2013 at 4:24 AM, Jan Hejl <jh@xxxxxxxxxx> wrote:
>>> Hi guys,
>>>
>>> i'm also experiencing this problem with M5A97 EVO R2.0. It has been "solved"
>>> in Xen 4.2.2 (discused here
>>> http://lists.xen.org/archives/html/xen-announce/2013-02/msg00006.html). But
>>> i agree on that that it should be repaired on ASUS side.
>>>
>>> And I'm also facing with prolem about Adaptec 3805 Raid card with enabled
>>> IOMMU on this motherbord. Without IOMMU storage adapter works perfectly, but
>>> with enabled IOMMU in BIOS i see the device under linux as block device but
>>> it's unusable - no data can read or written. Does anyone know what to do
>>> here, please? Could it be related with bad IOMMU implementation?
>>>
>>> Thanks in advance
>>> Jan
>>
>> What am I missing :p ?  What does "solved" in Xen 4.2.2 mean?  The
>> linked message discusses the original issue of the broken IVRS tables
>> and the "fix" is to implement checks to disable IOMMU on buggy bios's
>> after version 4.1.3.  In this case, the "fix" is the problem, unless I
>> missed something?



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