Re: [Qemu-devel] [PATCH v5 0/5] Connect a PCIe host and graphics support to RISC-V

[Stephen Bates]

> I added e1000 and e1000e support to my kernel and changed the QEMU command to:

So using -device e1000e rather than -device e1000 seems to work. I am not sure 
why -device e1000 causes a kernel panic. The MSI-X message is interesting and 
may be related to why NVMe interrupts are not reaching the OS in the guest?

[    0.216000] e1000: Intel(R) PRO/1000 Network Driver - version 7.3.21-k8-NAPI
[    0.216000] e1000: Copyright (c) 1999-2006 Intel Corporation.
[    0.216000] e1000e: Intel(R) PRO/1000 Network Driver - 3.2.6-k
[    0.216000] e1000e: Copyright(c) 1999 - 2015 Intel Corporation.
[    0.220000] e1000e 0000:00:01.0: assign IRQ: got 1
[    0.220000] e1000e 0000:00:01.0: enabling device (0000 -> 0002)
[    0.220000] e1000e 0000:00:01.0: enabling bus mastering
[    0.220000] e1000e 0000:00:01.0: Interrupt Throttling Rate (ints/sec) set to 
dynamic conservative mode
[    0.220000] e1000e 0000:00:01.0 0000:00:01.0 (uninitialized): Failed to 
initialize MSI-X interrupts.  Falling back to MSI interrupts.
[    0.220000] e1000e 0000:00:01.0 0000:00:01.0 (uninitialized): Failed to 
initialize MSI interrupts.  Falling back to legacy interrupts.
[    0.348000] e1000e 0000:00:01.0 eth0: (PCI Express:2.5GT/s:Width x1) 
52:54:00:12:34:56
[    0.356000] e1000e 0000:00:01.0 eth0: Intel(R) PRO/1000 Network Connection
[    0.356000] e1000e 0000:00:01.0 eth0: MAC: 3, PHY: 8, PBA No: 000000-000

address@hidden:~# lspci -vvv
00:00.0 Host bridge: Red Hat, Inc. QEMU PCIe Host bridge
        Subsystem: Red Hat, Inc QEMU PCIe Host bridge
        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-
lspci: Unable to load libkmod resources: error -12

00:01.0 Ethernet controller: Intel Corporation 82574L Gigabit Network Connection
        Subsystem: Intel Corporation 82574L Gigabit Network Connection
        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
        Interrupt: pin A routed to IRQ 1
        Region 0: Memory at 40040000 (32-bit, non-prefetchable) [size=128K]
        Region 1: Memory at 40060000 (32-bit, non-prefetchable) [size=128K]
        Region 2: I/O ports at <unassigned> [disabled]
        Region 3: Memory at 40080000 (32-bit, non-prefetchable) [size=16K]
        [virtual] Expansion ROM at 40000000 [disabled] [size=256K]
        Capabilities: [c8] 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: [e0] Express (v1) Root Complex Integrated Endpoint, MSI 00
                DevCap: MaxPayload 128 bytes, PhantFunc 0
                        ExtTag- RBE+
                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-
        Capabilities: [100 v2] 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-
        Capabilities: [140 v1] Device Serial Number 52-54-00-ff-ff-12-34-56
        Kernel driver in use: e1000e