Hi tglx, On 11/25/20 12:54 PM, Thomas Gleixner wrote: > Stefan, > > On Wed, Sep 16 2020 at 12:12, Stefan Bühler wrote: > > sorry for the delay. This fell through the cracks. > >> this quirk breaks our serial ports PCIe card (i.e. we don't see any >> output from the connected devices; no idea whether anything we send >> reaches them): >> >> 05:00.0 PCI bridge: PLX Technology, Inc. PEX8112 x1 Lane PCI Express-to-PCI Bridge (rev aa) >> 06:00.0 Serial controller: Oxford Semiconductor Ltd OX16PCI954 (Quad 16950 UART) function 0 (Uart) >> 06:00.1 Bridge: Oxford Semiconductor Ltd OX16PCI954 (Quad 16950 UART) function 0 (Disabled) >> 06:01.0 Serial controller: Oxford Semiconductor Ltd OX16PCI954 (Quad 16950 UART) function 0 (Uart) >> 06:01.1 Bridge: Oxford Semiconductor Ltd OX16PCI954 (Quad 16950 UART) >> function 0 (Disabled) > > Can you please provide the output of: > > for ID in 05:00.0 06:00.0 06:00.1 06:01.0 06:01.1; do lspci -s $ID -vvv; done > See attachment. Also I boot the affected systems now with "pci=noioapicquirk", which "solves" the issue too (instead of patching the kernel). cheers, Stefan
05:00.0 PCI bridge: PLX Technology, Inc. PEX8112 x1 Lane PCI Express-to-PCI Bridge (rev aa) (prog-if 00 [Normal decode]) Physical Slot: 1 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: 32 bytes Interrupt: pin A routed to IRQ 16 NUMA node: 0 Bus: primary=05, secondary=06, subordinate=06, sec-latency=64 I/O behind bridge: 0000e000-0000efff Memory behind bridge: fb400000-fb4fffff Prefetchable memory behind bridge: fff00000-000fffff Secondary status: 66MHz+ FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort+ <SERR- <PERR- BridgeCtl: Parity- SERR+ NoISA- VGA- MAbort- >Reset- FastB2B- PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn- Capabilities: <access denied> 06:00.0 Serial controller: Oxford Semiconductor Ltd OX16PCI954 (Quad 16950 UART) function 0 (Uart) (prog-if 06 [16950]) Subsystem: Oxford Semiconductor Ltd OX16PCI954 (Quad 16950 UART) function 0 (Uart) Control: I/O+ Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B- DisINTx- Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- Interrupt: pin A routed to IRQ 16 NUMA node: 0 Region 0: I/O ports at e0e0 [size=32] Region 1: Memory at fb407000 (32-bit, non-prefetchable) [size=4K] Region 2: I/O ports at e0c0 [size=32] Region 3: Memory at fb406000 (32-bit, non-prefetchable) [size=4K] Capabilities: <access denied> Kernel driver in use: serial 06:00.1 Bridge: Oxford Semiconductor Ltd OX16PCI954 (Quad 16950 UART) function 0 (Disabled) Subsystem: Oxford Semiconductor Ltd OX16PCI954 (Quad 16950 UART) function 0 (Disabled) Control: I/O- Mem- BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B- DisINTx- Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- NUMA node: 0 Region 0: I/O ports at e0a0 [disabled] [size=32] Region 1: Memory at fb405000 (32-bit, non-prefetchable) [disabled] [size=4K] Region 2: I/O ports at e080 [disabled] [size=32] Region 3: Memory at fb404000 (32-bit, non-prefetchable) [disabled] [size=4K] Capabilities: <access denied> 06:01.0 Serial controller: Oxford Semiconductor Ltd OX16PCI954 (Quad 16950 UART) function 0 (Uart) (prog-if 06 [16950]) Subsystem: Oxford Semiconductor Ltd OX16PCI954 (Quad 16950 UART) function 0 (Uart) Control: I/O+ Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B- DisINTx- Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- Interrupt: pin A routed to IRQ 17 NUMA node: 0 Region 0: I/O ports at e060 [size=32] Region 1: Memory at fb403000 (32-bit, non-prefetchable) [size=4K] Region 2: I/O ports at e040 [size=32] Region 3: Memory at fb402000 (32-bit, non-prefetchable) [size=4K] Capabilities: <access denied> Kernel driver in use: serial 06:01.1 Bridge: Oxford Semiconductor Ltd OX16PCI954 (Quad 16950 UART) function 0 (Disabled) Subsystem: Oxford Semiconductor Ltd OX16PCI954 (Quad 16950 UART) function 0 (Disabled) Control: I/O- Mem- BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B- DisINTx- Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- NUMA node: 0 Region 0: I/O ports at e020 [disabled] [size=32] Region 1: Memory at fb401000 (32-bit, non-prefetchable) [disabled] [size=4K] Region 2: I/O ports at e000 [disabled] [size=32] Region 3: Memory at fb400000 (32-bit, non-prefetchable) [disabled] [size=4K] Capabilities: <access denied>
