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Diffstat (limited to 'results/scraper/launchpad-without-comments/795866')
| -rw-r--r-- | results/scraper/launchpad-without-comments/795866 | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/results/scraper/launchpad-without-comments/795866 b/results/scraper/launchpad-without-comments/795866 new file mode 100644 index 00000000..c5d21ed2 --- /dev/null +++ b/results/scraper/launchpad-without-comments/795866 @@ -0,0 +1,108 @@ +pci passthrough doesn´t work + +Hi all, + +I have some problems passing through a pci device to kvm guest. +First I have to say that I´m using the latest kvm-kernel und qemu-kvm from git-tree (Date 11.06.2011). + +I want´t to passthrough this device to guest: + +lspci-output: + +02:00.0 Multimedia video controller: Micronas Semiconductor Holding AG Device 0720 (rev 01) + +So at first I have bind the driver to psi-stub: + +modprobe -r kvm-intel +modprobe -r kvm +echo "18c3 0720" > /sys/bus/pci/drivers/pci-stub/new_id +echo 0000:02:00.0 > /sys/bus/pci/devices/0000:02:00.0/driver/unbind +echo 0000:02:00.0 > /sys/bus/pci/drivers/pci-stub/bind +modprobe kvm +modprobe kvm-intel + +Then I have assigned device to guest: +-device pci-assign,host=02:00.0 + +When I start the guest. The device succesfully get´s an msi-IRQ on host-system: + +cat /proc/interrupt output: + + 32: 0 0 0 0 PCI-MSI-edge kvm_assigned_msi_device + + +On guest device is visibel: + +lspci output: +00:04.0 Multimedia video controller: Micronas Semiconductor Holding AG Device 0720 (rev 01) + + +Sometimes the device (on guest) get´s an IRQ between 10-16: + +00:05.0 Multimedia video controller: Micronas Semiconductor Holding AG Device 0720 (rev 01) + Subsystem: Micronas Semiconductor Holding AG Device dd00 + 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 11 + Region 0: Memory at f2050000 (32-bit, non-prefetchable) [size=64K] + Region 1: Memory at f2060000 (32-bit, non-prefetchable) [size=64K] + Capabilities: [58] Express (v1) Endpoint, MSI 00 + DevCap: MaxPayload 128 bytes, PhantFunc 0, Latency L0s <64ns, L1 <1us + ExtTag- AttnBtn- AttnInd- PwrInd- 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 #0, Speed 2.5GT/s, Width x1, ASPM L0s, Latency L0 unlimited, L1 unlimited + ClockPM- Suprise- 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: [40] Power Management version 2 + Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-) + Status: D0 PME-Enable- DSel=0 DScale=0 PME- + Capabilities: [48] Message Signalled Interrupts: Mask- 64bit- Queue=0/0 Enable- + Address: 00000000 Data: 0000 + Kernel modules: ngene + + +In this case the kernel-modul (ngene) can not access the device: + +dmesg | grep ngene + +[ 69.977900] ngene 0000:00:05.0: PCI INT A -> Link[LNKA] -> GSI 11 (level, high) -> IRQ 11 +[ 69.977909] ngene: Found Linux4Media cineS2 DVB-S2 Twin Tuner (v5) +[ 69.978962] ngene 0000:00:05.0: setting latency timer to 64 +[ 69.979118] ngene: Device version 1 +[ 69.979129] ngene 0000:00:05.0: firmware: requesting ngene_18.fw +[ 69.980884] ngene: Loading firmware file ngene_18.fw. +[ 71.981052] ngene: Command timeout cmd=01 prev=00 +[ 71.981205] host_to_ngene (c000): 01 00 00 00 00 00 00 00 +[ 71.981457] ngene_to_host (c100): 00 00 00 00 00 00 00 00 +[ 71.981704] dev->hosttongene (ec902000): 01 00 00 00 00 00 00 00 +[ 71.981963] dev->ngenetohost (ec902100): 00 00 00 00 00 00 00 00 +[ 73.985111] ngene: Command timeout cmd=02 prev=00 +[ 73.985415] host_to_ngene (c000): 02 04 00 d0 00 04 00 00 +[ 73.985684] ngene_to_host (c100): 00 00 00 00 00 00 00 00 +[ 73.985931] dev->hosttongene (ec902000): 02 04 00 d0 00 04 00 00 +[ 73.986191] dev->ngenetohost (ec902100): 00 00 00 00 00 00 00 00 +[ 73.986568] ngene 0000:00:05.0: PCI INT A disabled +[ 73.986584] ngene: probe of 0000:00:05.0 failed with error -1 + + +Sometimes the device (on guest) gets an msi-irq f. e. IRQ 29. +Then kernel-modul (ngene) can succesfully load the driver and all works fine. + + +Short to say: + +HOST GUEST STATUS +MSI-IRQ MSI-IRQ ALL FINE +MSI-IRQ IOAPIC-IRQ DOESN´t WORK + +with modinfo I had a look at the kernel-modul if there is way to force msi, but without success. + +But I think IRQ between (10-16) should also work because when I load the kernel-modul on host with IRQ (10-16) +it works. (Device only get´s an MSI-IRQ If I start the vm to passthrough) + +Do anyone know where can be the problem? \ No newline at end of file |