Re: [PATCH 1/3] iommu/amd: Add logic to decode AMD IOMMU event flag

[Suravee Suthikulpanit]

On 4/2/2013 10:29 AM, Borislav Petkov wrote:
> On Tue, Apr 02, 2013 at 05:03:04PM +0200, Joerg Roedel wrote:
> > On Tue, Apr 02, 2013 at 04:40:37PM +0200, Borislav Petkov wrote:
> > > While you guys are at it, can someone fix this too pls (ASUS board with
> > > a PD on it).
> > >
> > > [    0.220342] [Firmware Bug]: AMD-Vi: IOAPIC[9] not in IVRS table
> > > [    0.220398] [Firmware Bug]: AMD-Vi: IOAPIC[10] not in IVRS table
> > > [    0.220451] [Firmware Bug]: AMD-Vi: No southbridge IOAPIC found in IVRS table
> > > [    0.220506] AMD-Vi: Disabling interrupt remapping due to BIOS Bug(s)
> > That is actually a BIOS problem. I wonder whether it would help to turn this
> > into a WARN_ON to get the board vendors to release working BIOSes.
> > Opinions?
> Good luck trying to get ASUS to fix anything in their BIOS :(.
I have tried to contact Asus in the past to have them fix the issue, but 
I got no luck.  Once it is out in the field, it's very difficult to get 
them to make changes.  I am also addressing this issue with the BIOS 
team for the future hardware.

Turning this into WARN_ON() at this point might break a lot of systems 
currently out in the field.  However, users can always switching to use 
"intremap=off" but this might not be obvious.

Suravee

> Can't we detect the SB IOAPIC some other way in this case?


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