From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mout2.freenet.de ([195.4.92.92]:35140 "EHLO mout2.freenet.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753474AbaJVQ1I (ORCPT ); Wed, 22 Oct 2014 12:27:08 -0400 Date: Wed, 22 Oct 2014 18:20:46 +0200 From: Andreas Hartmann To: Alex Williamson Cc: Bjorn Helgaas , linux-pci Subject: Re: Hard and silent lock up since linux 3.14 with PCIe pass through (vfio) Message-ID: <20141022182046.28386911@dualc.maya.org> In-Reply-To: <1413993749.4202.197.camel@ul30vt.home> References: <20140923210318.498dacbd@dualc.maya.org> <1411502866.24563.8.camel@ul30vt.home> <5437A958.3000201@maya.org> <5437F1F5.3010706@maya.org> <543804BC.3080307@maya.org> <20141011003219.560cca97@dualc.maya.org> <20141010225408.GA24493@google.com> <5438CC1E.3060407@maya.org> <1413360267.4202.70.camel@ul30vt.home> <54406B34.1050808@maya.org> <1413925580.4202.189.camel@ul30vt.home> <20141022173405.2e5474a1@dualc.maya.org> <1413993749.4202.197.camel@ul30vt.home> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Sender: linux-pci-owner@vger.kernel.org List-ID: Am Wed, 22 Oct 2014 10:02:29 -0600 schrieb Alex Williamson : > On Wed, 2014-10-22 at 17:34 +0200, Andreas Hartmann wrote: > > Alex Williamson schrieb: > > > Hi Andreas, > > > > > > On Fri, 2014-10-17 at 03:04 +0200, Andreas Hartmann wrote: > > >> Hello Alex, > > >> > > >> Alex Williamson wrote: > > >>> Hi Andreas, > > >> [...] > > >>> Sorry for the breakage. Is it possible to run lspci on the device in a > > >>> loop from the host and capture whether we're failing to restore some of > > >>> the VC bits to their previous state? > > >> > > >>> Does the problem also occur if you > > >>> unbind from host driver, > > >> > > >> The machine is booted w/ blacklisted ath9k. Then, the device is bound to > > >> vfio: > > >> > > >> echo "168c 0030" > /sys/bus/pci/drivers/vfio-pci/new_id > > >> echo 0000:03:00.0 > /sys/bus/pci/devices/0000:03:00.0/driver/unbind > > >> echo 0000:03:00.0 > /sys/bus/pci/drivers/vfio-pci/bind > > >> > > >> afterwards the VM is started -> hang. > > >> > > >> W/o starting th VM, I can bind it to vfio and unbind it from vfio w/o > > >> any problem. > > >> > > >>> echo 1 > reset in pci-sysfs, > > >> > > >> echo 1 > /sys/bus/pci/devices/0000:03:00.0 works w/o any problem while > > >> bound to vfio. Even after unbinding from vfio and rebinding to vfio > > >> again ... . > > >> > > >>> and re-bind to the > > >> > > >> Do you mean loading ath9k in host system after unbinding from vfio? If > > >> yes: Works w/o any problem. It's even possible to reset it or do a > > >> ifconfig wlan0 up, ifconfig wlan0 down, rmmod ath9k, bind it to vfio > > >> again and reset it, .... > > >> > > >> Looks like the hang only is triggered by qemu-system_x86_64 on startup > > >> the VM. > > >> > > >>> host? I'll also try to reproduce on my 990fx system, but I won't be > > >>> able to do that until next week due to travel. Thanks, > > > > > > Could you send me the lspci -vvvxxxx for the device and parent root > > > port? Thanks, > > > > > > Done with kernel 3.12.28 in host while the device was used in VM: > > > > # lspci -vt > > -[0000:00]-+-00.0 Advanced Micro Devices, Inc. [AMD/ATI] RD890 PCI to PCI bridge (external gfx0 port B) > > +-00.2 Advanced Micro Devices, Inc. [AMD/ATI] RD990 I/O Memory Management Unit (IOMMU) > > +-02.0-[01]--+-00.0 Advanced Micro Devices, Inc. [AMD/ATI] Turks PRO [Radeon HD 6570/7570] > > | \-00.1 Advanced Micro Devices, Inc. [AMD/ATI] Turks/Whistler HDMI Audio [Radeon HD 6000 Series] > > +-04.0-[02]----00.0 Etron Technology, Inc. EJ168 USB 3.0 Host Controller > > +-05.0-[03]----00.0 Qualcomm Atheros AR93xx Wireless Network Adapter > > +-09.0-[04]----00.0 Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller > > +-0a.0-[05]----00.0 Etron Technology, Inc. EJ168 USB 3.0 Host Controller > > +-11.0 Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 SATA Controller [AHCI mode] > > +-12.0 Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 USB OHCI0 Controller > > +-12.2 Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 USB EHCI Controller > > +-13.0 Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 USB OHCI0 Controller > > +-13.2 Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 USB EHCI Controller > > +-14.0 Advanced Micro Devices, Inc. [AMD/ATI] SBx00 SMBus Controller > > +-14.2 Advanced Micro Devices, Inc. [AMD/ATI] SBx00 Azalia (Intel HDA) > > +-14.3 Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 LPC host controller > > +-14.4-[06]--+-06.0 Intel Corporation 82557/8/9/0/1 Ethernet Pro 100 > > | \-0e.0 VIA Technologies, Inc. VT6306/7/8 [Fire II(M)] IEEE 1394 OHCI Controller > > +-14.5 Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 USB OHCI2 Controller > > +-15.0-[07]-- > > +-16.0 Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 USB OHCI0 Controller > > +-16.2 Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 USB EHCI Controller > > +-18.0 Advanced Micro Devices, Inc. [AMD] Family 15h Processor Function 0 > > +-18.1 Advanced Micro Devices, Inc. [AMD] Family 15h Processor Function 1 > > +-18.2 Advanced Micro Devices, Inc. [AMD] Family 15h Processor Function 2 > > +-18.3 Advanced Micro Devices, Inc. [AMD] Family 15h Processor Function 3 > > +-18.4 Advanced Micro Devices, Inc. [AMD] Family 15h Processor Function 4 > > \-18.5 Advanced Micro Devices, Inc. [AMD] Family 15h Processor Function 5 > > > > > > # lspci -s 03:00 -vvvxxxx > > 03:00.0 Network controller: Qualcomm Atheros AR93xx Wireless Network Adapter (rev 01) > [snip] > > > > > > I'm not sure what you mean with "parent root port". Could it be this: > > No, it's 00:05.0 # lspci -s 00:05.0 -vvvxxxx 00:05.0 PCI bridge: Advanced Micro Devices, Inc. [AMD/ATI] RD890 PCI to PCI bridge (PCI express gpp port E) (prog-if 00 [Normal decode]) Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx- Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- SERR- TAbort- Reset- FastB2B- PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn- Capabilities: [50] 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=0 PME- Capabilities: [58] Express (v2) Root Port (Slot+), MSI 00 DevCap: MaxPayload 128 bytes, PhantFunc 0, Latency L0s <64ns, L1 <1us ExtTag+ RBE+ FLReset- DevCtl: Report errors: Correctable- Non-Fatal- Fatal- Unsupported- RlxdOrd+ ExtTag- PhantFunc- AuxPwr- NoSnoop+ MaxPayload 128 bytes, MaxReadReq 128 bytes DevSta: CorrErr- UncorrErr- FatalErr- UnsuppReq- AuxPwr- TransPend- LnkCap: Port #1, Speed 5GT/s, Width x1, ASPM L0s L1, Latency L0 <1us, L1 <8us 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- SltCap: AttnBtn- PwrCtrl- MRL- AttnInd- PwrInd- HotPlug- Surprise- Slot #5, PowerLimit 75.000W; Interlock- NoCompl+ SltCtl: Enable: AttnBtn- PwrFlt- MRL- PresDet- CmdCplt- HPIrq- LinkChg- Control: AttnInd Unknown, PwrInd Unknown, Power- Interlock- SltSta: Status: AttnBtn- PowerFlt- MRL- CmdCplt- PresDet+ Interlock- Changed: MRL- PresDet+ LinkState+ RootCtl: ErrCorrectable- ErrNon-Fatal- ErrFatal- PMEIntEna- CRSVisible- RootCap: CRSVisible- RootSta: PME ReqID 0000, PMEStatus- PMEPending- DevCap2: Completion Timeout: Range ABCD, TimeoutDis+, LTR-, OBFF Not Supported ARIFwd+ DevCtl2: Completion Timeout: 65ms to 210ms, TimeoutDis-, LTR-, OBFF Disabled ARIFwd- LnkCtl2: Target Link Speed: 5GT/s, EnterCompliance- SpeedDis- Transmit Margin: Normal Operating Range, EnterModifiedCompliance- ComplianceSOS- Compliance De-emphasis: -6dB LnkSta2: Current De-emphasis Level: -3.5dB, EqualizationComplete-, EqualizationPhase1- EqualizationPhase2-, EqualizationPhase3-, LinkEqualizationRequest- Capabilities: [a0] MSI: Enable- Count=1/1 Maskable- 64bit- Address: 00000000 Data: 0000 Capabilities: [b0] Subsystem: Gigabyte Technology Co., Ltd Device 5000 Capabilities: [b8] HyperTransport: MSI Mapping Enable+ Fixed+ Capabilities: [100 v1] Vendor Specific Information: ID=0001 Rev=1 Len=010 Capabilities: [190 v1] Access Control Services ACSCap: SrcValid+ TransBlk+ ReqRedir+ CmpltRedir+ UpstreamFwd+ EgressCtrl- DirectTrans+ ACSCtl: SrcValid+ TransBlk- ReqRedir+ CmpltRedir+ UpstreamFwd+ EgressCtrl- DirectTrans- Kernel driver in use: pcieport Kernel modules: shpchp 00: 02 10 19 5a 07 00 10 00 00 00 04 06 10 00 01 00 10: 00 00 00 00 00 00 00 00 00 03 03 00 c1 c1 00 20 20: b0 fd b0 fd a1 fd a1 fd 00 00 00 00 00 00 00 00 30: 00 00 00 00 50 00 00 00 00 00 00 00 05 01 00 00 40: 00 00 00 00 00 00 00 00 00 00 00 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00 00 00 00 00 00 00 00 00 e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 e90: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ea0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 eb0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ec0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ed0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ee0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ef0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 f10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 f20: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 f30: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 f40: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 f50: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 f60: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 f70: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 f90: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fa0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fb0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fd0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fe0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ff0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 Thanks, Andreas