Messages in this thread | | | Date | Tue, 15 Nov 2011 07:29:29 +0100 | From | Arnd Hannemann <> | Subject | Re: 3.2rc1: bootup fails: DRHD: handling fault status reg 2 |
| |
Am 15.11.2011 05:31, schrieb Robert Hancock: > On 11/14/2011 06:53 PM, Arnd Hannemann wrote: >> Hi, >> >> Am 14.11.2011 23:33, schrieb Arnd Hannemann: >> >>> when trying to boot kernel 3.2rc1 on my thinkpad t510 I get an endless loop of errors: >>> >>> DRHD: handling fault status reg 2 >>> DMAR: [DMA Read] Request device [0d:00.0] fault addr fffff000 >>> DMAR: [fault reason 02] Present bit in context entry is clear >>> >>> screenshot can be found here: >>> http://arndnet.de/lkml/screenshot3.2rc1.jpg >>> >>> kernel 3.1.1 is booting up flawlessly. >> >> I must have inadvertently enabled CONFIG_INTEL_IOMMU_DEFAULT_ON in my config >> for 3.2-rc1. >> >> With disabled CONFIG_INTEL_IOMMU_DEFAULT_ON my thinkpad boots up again. >> Not sure if this is expected? > > No, that's not supposed to happen. Can you post the output of "lspci -vv"? Apparently that device 0d:00.0 is generating unexpected DMA accesses for some reason.
Looks lite a "Ricoh Co Ltd MMC/SD Host Controller" is the culprit:
0d:00.0 SD Host controller: Ricoh Co Ltd MMC/SD Host Controller (rev 01) Subsystem: Lenovo Device 2133 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- Latency: 0, Cache Line Size: 64 bytes Interrupt: pin A routed to IRQ 16 Region 0: Memory at f2500000 (32-bit, non-prefetchable) [size=256] Capabilities: [50] MSI: Enable- Count=1/1 Maskable- 64bit+ Address: 0000000000000000 Data: 0000 Capabilities: [78] Power Management version 3 Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA PME(D0+,D1+,D2+,D3hot+,D3cold+) Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=2 PME- Capabilities: [80] Express (v1) Endpoint, MSI 00 DevCap: MaxPayload 128 bytes, PhantFunc 0, Latency L0s unlimited, L1 unlimited ExtTag- AttnBtn+ AttnInd+ PwrInd+ RBE+ FLReset- DevCtl: Report errors: Correctable- Non-Fatal- Fatal- Unsupported- RlxdOrd+ ExtTag- PhantFunc- AuxPwr- NoSnoop+ MaxPayload 128 bytes, MaxReadReq 512 bytes DevSta: CorrErr+ UncorrErr- FatalErr- UnsuppReq+ AuxPwr- TransPend- LnkCap: Port #1, Speed 2.5GT/s, Width x1, ASPM L0s L1, Latency L0 <4us, L1 <64us ClockPM+ Surprise- LLActRep- BwNot- LnkCtl: ASPM Disabled; RCB 64 bytes Disabled- Retrain- CommClk+ ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt- LnkSta: Speed 2.5GT/s, Width x1, TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt- Capabilities: [100 v1] Virtual Channel Caps: LPEVC=0 RefClk=100ns PATEntryBits=1 Arb: Fixed- WRR32- WRR64- WRR128- Ctrl: ArbSelect=Fixed Status: InProgress- VC0: Caps: PATOffset=00 MaxTimeSlots=1 RejSnoopTrans- Arb: Fixed- WRR32- WRR64- WRR128- TWRR128- WRR256- Ctrl: Enable+ ID=0 ArbSelect=Fixed TC/VC=ff Status: NegoPending- InProgress- Capabilities: [800 v1] Advanced Error Reporting UESta: DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt- RxOF- MalfTLP- ECRC- UnsupReq- ACSViol- UEMsk: DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt- RxOF- MalfTLP- ECRC- UnsupReq- ACSViol- UESvrt: DLP+ SDES+ TLP- FCP+ CmpltTO- CmpltAbrt- UnxCmplt- RxOF+ MalfTLP+ ECRC- UnsupReq- ACSViol- CESta: RxErr- BadTLP- BadDLLP- Rollover- Timeout- NonFatalErr+ CEMsk: RxErr- BadTLP- BadDLLP- Rollover- Timeout- NonFatalErr+ AERCap: First Error Pointer: 00, GenCap+ CGenEn- ChkCap+ ChkEn- Kernel driver in use: sdhci-pci Kernel modules: sdhci-pci
Best regards, Arnd
| |