linux-kernel - Re: radeon KMS causes GART Table Walk Errors (was: K8 ECC error with linux-2.6.32)

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Date:	Thu, 17 Dec 2009 20:03:29 +0100
From:	Johannes Hirte <johannes.hirte@....tu-ilmenau.de>
To:	Borislav Petkov <borislav.petkov@....com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: radeon KMS causes GART Table Walk Errors (was: K8 ECC error with linux-2.6.32)

Am Donnerstag 17 Dezember 2009 08:22:32 schrieb Borislav Petkov:
> On Thu, Dec 17, 2009 at 04:07:04AM +0100, Johannes Hirte wrote:
> > > > Disabling in BIOS doesn't made any difference. The errors were still
> > > > reported.
> > >
> > > Hmm. It would be interesting to know what the BIOS does exactly
> > > on your machine. We could easily find that out by installing the
> > > x86info tool (either prepackaged for your distro or from here:
> > > git://git.choralone.org/git/x86info) and doing as root:
> > >
> > > lsmsr MC4 -V3
> > >
> > > and sending me the output. Make sure the amd64_edac module is not
> > > loaded.
> >
> > datengrab ~ # lsmsr MC4 -V3
> > MC4_CTL              = 0x0000000000003bff
> >   CorrEccEn=0x1
> >   UnCorrEccEn=0x1
> >   CrcErr0En=0x1
> >   CrcErr1En=0x1
> >   CrcErr2En=0x1
> >   SyncPkt0En=0x1
> >   SyncPkt1En=0x1
> >   SyncPkt2En=0x1
> >   MstrAbrtEn=0x1
> >   TgtAbrtEn=0x1
> >   GartTblWkEn=0
> 
> Was the BIOS setting about GART table walk errors reporting enabled or
> disabled? Because if it were enabled and according to the above output,
> your BIOS doesn't seem to do the workaround described in the BKDG. If it
> were disabled, you'd have to enable it and do the "lsmsr MC4 -V3" again.
> 
> Thanks.

GART Error Reporting was disabled. Here is the output after enabling it:

datengrab ~ # lsmsr MC4 -V3                                                                                                                                     
MC4_CTL              = 0x0000000000003bff                                                                                                                       
  CorrEccEn=0x1                                                                                                                                                 
  UnCorrEccEn=0x1                                                                                                                                               
  CrcErr0En=0x1                                                                                                                                                 
  CrcErr1En=0x1                                                                                                                                                 
  CrcErr2En=0x1                                                                                                                                                 
  SyncPkt0En=0x1                                                                                                                                                
  SyncPkt1En=0x1
  SyncPkt2En=0x1
  MstrAbrtEn=0x1
  TgtAbrtEn=0x1
  GartTblWkEn=0
  AtomicRMWEn=0x1
  WchDogTmrEn=0x1
  DramParEn=0
MC4_STATUS           = 0x0000000000000000
  ErrorCode=0
  ErrorCodeExt=0
  Syndrome=0
  ErrCpu0=0
  ErrCpu1=0
  LDTLink=0
  ErrScrub=0
  DramChannel=0
  UnCorrECC=0
  CorrECC=0
  ECC_Synd=0
  PCC=0
  ErrAddrVal=0
  ErrMiscVal=0
  ErrEn=0
  ErrUnCorr=0
  ErrOver=0
  ErrValid=0
MC4_ADDR             = 0x0000000090063a20
  ADDR=0x1200c744
MC4_MISC             = 0x0000000000000000
  ErrCount=0
  Ovrflw=0
  IntType=0
  CntEn=0
  LvtOff=0
  Locked=0
  CtrP=0
  Val=0
MC4_CTL_MASK         = 0x0000000000000000
  CorrEccEn=0
  UnCorrEccEn=0
  CrcErr0En=0
  CrcErr1En=0
  CrcErr2En=0
  SyncPkt0En=0
  SyncPkt1En=0
  SyncPkt2En=0
  MstrAbrtEn=0
  TgtAbrtEn=0
  GartTblWkEn=0
  AtomicRMWEn=0
  WchDogTmrEn=0
  DramParEn=0


regards,
  Johannes
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