Problem: dmar: DRHD: handling fault status reg 3 on Red Hat 6.5

Problem: dmar: DRHD: handling fault status reg 3 on Red Hat 6.5

[Dominguez, Caesar]

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When attempting to boot a fresh Red hat 6.5 installation, kernel constantly show the following message.
If user uses 6.4, none of this issue is seen.

06] PTE Read access is not set
dmar: DRHD: handling fault status reg 3
dmar: DMAR:[DMA Read] Request device [00:02.0] fault addr 7f800000

This only is seeing on Red Hat 6.5, same system configuration using Red Hat 6.4, do not cause this issu
Current workaournd is to disable iommu
Using both options resolve the issue
Intel_iommu=igfx_off
Or
Intel_iommu=off

I suspect of Kernel modules: i915, is there a Red Hat 6.5 bugzilla reporting this or should I look for a i915 module?
Since same module is used on Red hat 6.4.

Details device [00:02.0]
00:02.0 VGA compatible controller: Intel Corporation Xeon E3-1200 v3 Processor Integrated Graphics Controller (rev 06) (prog-if 00 [VGA controller])
     Subsystem: Intel Corporation Device 2212
     Control: I/O+ Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
     Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
     Interrupt: pin A routed to IRQ 16
     Region 0: Memory at c0000000 (64-bit, non-prefetchable) [size=4M]
     Region 2: Memory at b0000000 (64-bit, prefetchable) [size=256M]
     Region 4: I/O ports at 6000 [size=64]
     Expansion ROM at <unassigned> [disabled]
     Capabilities: [90] MSI: Enable- Count=1/1 Maskable- 64bit-
           Address: 00000000  Data: 0000
     Capabilities: [d0] Power Management version 2
           Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
          Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
     Capabilities: [a4] PCI Advanced Features
           AFCap: TP+ FLR+
           AFCtrl: FLR-
           AFStatus: TP-
     Kernel modules: i915




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Re: Problem: dmar: DRHD: handling fault status reg 3 on Red Hat 6.5

[Alex Williamson]

On Thu, 2014-01-16 at 01:11 +0000, Dominguez, Caesar wrote:
> When attempting to boot a fresh Red hat 6.5 installation, kernel
> constantly show the following message.

Please report RHEL issues to the RH bugzilla,
https://bugzilla.redhat.com/

Include the full console log or dmesg.  Thanks,

Alex

> If user uses 6.4, none of this issue is seen.
> 
>  
> 
> 06] PTE Read access is not set
> 
> dmar: DRHD: handling fault status reg 3
> 
> dmar: DMAR:[DMA Read] Request device [00:02.0] fault addr 7f800000 
> 
>  
> 
> This only is seeing on Red Hat 6.5, same system configuration using
> Red Hat 6.4, do not cause this issu
> 
> Current workaournd is to disable iommu
> 
> Using both options resolve the issue
> 
> Intel_iommu=igfx_off
> 
> Or
> 
> Intel_iommu=off
> 
>  
> 
> I suspect of Kernel modules: i915, is there a Red Hat 6.5 bugzilla
> reporting this or should I look for a i915 module?
> 
> Since same module is used on Red hat 6.4. 
> 
>  
> 
> Details device [00:02.0]
> 
> 00:02.0 VGA compatible controller: Intel Corporation Xeon E3-1200 v3
> Processor Integrated Graphics Controller (rev 06) (prog-if 00 [VGA
> controller])
> 
>      Subsystem: Intel Corporation Device 2212
> 
>      Control: I/O+ Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop-
> ParErr- Stepping- SERR- FastB2B- DisINTx-
> 
>      Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort-
> <TAbort- <MAbort- >SERR- <PERR- INTx-
> 
>      Interrupt: pin A routed to IRQ 16
> 
>      Region 0: Memory at c0000000 (64-bit, non-prefetchable) [size=4M]
> 
>      Region 2: Memory at b0000000 (64-bit, prefetchable) [size=256M]
> 
>      Region 4: I/O ports at 6000 [size=64]
> 
>      Expansion ROM at <unassigned> [disabled]
> 
>      Capabilities: [90] MSI: Enable- Count=1/1 Maskable- 64bit-
> 
>            Address: 00000000  Data: 0000
> 
>      Capabilities: [d0] Power Management version 2
> 
>            Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA
> PME(D0-,D1-,D2-,D3hot-,D3cold-)
> 
>           Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
> 
>      Capabilities: [a4] PCI Advanced Features
> 
>            AFCap: TP+ FLR+
> 
>            AFCtrl: FLR-
> 
>            AFStatus: TP-
> 
>      Kernel modules: i915
> 
>  
> 
>  
> 
>  
> 
> 
> _______________________________________________
> iommu mailing list
> iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org
> https://lists.linuxfoundation.org/mailman/listinfo/iommu

RE: Problem: dmar: DRHD: handling fault status reg 3 on Red Hat 6.5

[Dominguez, Caesar]

Reported RH bugzilla, https://bugzilla.redhat.com/
https://bugzilla.redhat.com/show_bug.cgi?id=1054377
Issue is only seen on Intel IGD (more details on previous link) when CPU is INTEL VT-D capable and using Red hat 6.5 , previous one 6.4 do not show this faults
Not sure if this has already been reported or if Red hat has Patch for this issue.


-----Original Message-----
From: Alex Williamson [mailto:alex.williamson-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org] 
Sent: Wednesday, January 15, 2014 9:58 PM
To: Dominguez, Caesar
Cc: iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org
Subject: Re: Problem: dmar: DRHD: handling fault status reg 3 on Red Hat 6.5

On Thu, 2014-01-16 at 01:11 +0000, Dominguez, Caesar wrote:
> When attempting to boot a fresh Red hat 6.5 installation, kernel 
> constantly show the following message.

Please report RHEL issues to the RH bugzilla, https://bugzilla.redhat.com/

Include the full console log or dmesg.  Thanks,

Alex

> If user uses 6.4, none of this issue is seen.
> 
>  
> 
> 06] PTE Read access is not set
> 
> dmar: DRHD: handling fault status reg 3
> 
> dmar: DMAR:[DMA Read] Request device [00:02.0] fault addr 7f800000
> 
>  
> 
> This only is seeing on Red Hat 6.5, same system configuration using 
> Red Hat 6.4, do not cause this issu
> 
> Current workaournd is to disable iommu
> 
> Using both options resolve the issue
> 
> Intel_iommu=igfx_off
> 
> Or
> 
> Intel_iommu=off
> 
>  
> 
> I suspect of Kernel modules: i915, is there a Red Hat 6.5 bugzilla 
> reporting this or should I look for a i915 module?
> 
> Since same module is used on Red hat 6.4. 
> 
>  
> 
> Details device [00:02.0]
> 
> 00:02.0 VGA compatible controller: Intel Corporation Xeon E3-1200 v3 
> Processor Integrated Graphics Controller (rev 06) (prog-if 00 [VGA
> controller])
> 
>      Subsystem: Intel Corporation Device 2212
> 
>      Control: I/O+ Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop-
> ParErr- Stepping- SERR- FastB2B- DisINTx-
> 
>      Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort-
> <TAbort- <MAbort- >SERR- <PERR- INTx-
> 
>      Interrupt: pin A routed to IRQ 16
> 
>      Region 0: Memory at c0000000 (64-bit, non-prefetchable) [size=4M]
> 
>      Region 2: Memory at b0000000 (64-bit, prefetchable) [size=256M]
> 
>      Region 4: I/O ports at 6000 [size=64]
> 
>      Expansion ROM at <unassigned> [disabled]
> 
>      Capabilities: [90] MSI: Enable- Count=1/1 Maskable- 64bit-
> 
>            Address: 00000000  Data: 0000
> 
>      Capabilities: [d0] Power Management version 2
> 
>            Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA
> PME(D0-,D1-,D2-,D3hot-,D3cold-)
> 
>           Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
> 
>      Capabilities: [a4] PCI Advanced Features
> 
>            AFCap: TP+ FLR+
> 
>            AFCtrl: FLR-
> 
>            AFStatus: TP-
> 
>      Kernel modules: i915
> 
>  
> 
>  
> 
>  
> 
> 
> _______________________________________________
> iommu mailing list
> iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org
> https://lists.linuxfoundation.org/mailman/listinfo/iommu