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:[email protected]] Sent: Wednesday, January 15, 2014 9:58 PM To: Dominguez, Caesar Cc: [email protected] 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 > [email protected] > https://lists.linuxfoundation.org/mailman/listinfo/iommu _______________________________________________ iommu mailing list [email protected] https://lists.linuxfoundation.org/mailman/listinfo/iommu
