Re: PCIe device pass-through - No IOMMU, Failed to deassign device error

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On Saturday 23 January 2010 05:20:49 Yigal Korman wrote:
> Hi,
> I'm trying to pass a second video card to a Windows 7 virtual machine
> with KVM, and I get the following error:


KVM doesn't support assigning graphics cards to VMs yet. There are people 
working on it afaik, but I don't know the progress.


> "
> root@ubuntu-desktop:~# kvm -cpu qemu64 -hda /dev/sdb -cdrom /dev/cdrom
> -boot order=dc -m 2000 -usb -name Win7x64 -enable-kvm -device
> pci-assign,host=80:00.0
> No IOMMU found.  Unable to assign device "(null)"
> Failed to deassign device "(null)" : Invalid argument
> Error initializing device pci-assign
> "
> Now it look like I don't have VT-d, but I do, here is my cpuinfo:
> "
> processor : 0
> vendor_id : GenuineIntel
> cpu family : 6
> model : 23
> model name : Intel(R) Xeon(R) CPU           E5440  @ 2.83GHz
> stepping : 10
> cpu MHz : 1998.000
> cache size : 6144 KB
> physical id : 0
> siblings : 4
> core id : 0
> cpu cores : 4
> apicid : 0
> initial apicid : 0
> fpu : yes
> fpu_exception : yes
> cpuid level : 13
> wp : yes
> flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov
> pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx
> lm constant_tsc arch_perfmon pebs bts rep_good aperfmperf pni dtes64
> monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm dca sse4_1 xsave
> lahf_lm tpr_shadow vnmi flexpriority
> bogomips : 5667.49
> clflush size : 64
> cache_alignment : 64
> address sizes : 38 bits physical, 48 bits virtual
> power management:
> " ... this continues until processor reaches 7 (dual Xeon quad core)
> I've enabled vt-d in the BIOS, and added this parameter to the kernel:
> "intel_iommu=on"
> I've ran these to unbind the card from the host OS:
> "
> modprobe pci_stub
> echo "10de 040f" > /sys/bus/pci/drivers/pci-stub/new_id
> echo 0000:80:00.0 > /sys/bus/pci/devices/0000\:80\:00.0/driver/unbind
> echo 0000:80:00.0 > /sys/bus/pci/drivers/pci-stub/bind
> "
> this is the relevant part from lspci -vv (I have two video cards, one
> I'd like for the host and one for the guest):
> "
> 60:00.0 VGA compatible controller: nVidia Corporation G84 [Quadro FX
> 1700] (rev a1)
> Subsystem: nVidia Corporation Device 049a
> 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 28
> Region 0: Memory at f6000000 (32-bit, non-prefetchable) [size=16M]
> Region 1: Memory at a0000000 (64-bit, prefetchable) [size=512M]
> Region 3: Memory at f4000000 (64-bit, non-prefetchable) [size=32M]
> Region 5: I/O ports at 2000 [size=128]
> Capabilities: [60] 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: [68] Message Signalled Interrupts: Mask- 64bit+ Queue=0/0
>  Enable- Address: 0000000000000000  Data: 0000
> Capabilities: [78] Express (v2) Endpoint, MSI 00
> DevCap: MaxPayload 128 bytes, PhantFunc 0, Latency L0s <512ns, L1 <4us
> 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 #8, Speed 5GT/s, Width x16, ASPM L0s L1, Latency L0 <512ns, L1
>  <4us ClockPM- Suprise- LLActRep- BwNot-
> LnkCtl: ASPM Disabled; RCB 128 bytes Disabled- Retrain- CommClk+
> ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt-
> LnkSta: Speed 5GT/s, Width x16, TrErr- Train- SlotClk+ DLActive-
> BWMgmt- ABWMgmt-
> Capabilities: [100] Virtual Channel <?>
> Capabilities: [128] Power Budgeting <?>
> Capabilities: [600] Vendor Specific Information <?>
> Kernel driver in use: nvidia
> Kernel modules: nvidia, nvidiafb
> 80:00.0 VGA compatible controller: nVidia Corporation G84 [Quadro FX
> 1700] (rev a1)
> Subsystem: nVidia Corporation Device 049a
> 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 24
> Region 0: Memory at f2000000 (32-bit, non-prefetchable) [size=16M]
> Region 1: Memory at c0000000 (64-bit, prefetchable) [size=512M]
> Region 3: Memory at f0000000 (64-bit, non-prefetchable) [size=32M]
> Region 5: I/O ports at 1000 [size=128]
> Capabilities: [60] 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: [68] Message Signalled Interrupts: Mask- 64bit+ Queue=0/0
>  Enable- Address: 0000000000000000  Data: 0000
> Capabilities: [78] Express (v2) Endpoint, MSI 00
> DevCap: MaxPayload 128 bytes, PhantFunc 0, Latency L0s <512ns, L1 <4us
> 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 #4, Speed 5GT/s, Width x16, ASPM L0s L1, Latency L0 <512ns, L1
>  <4us ClockPM- Suprise- LLActRep- BwNot-
> LnkCtl: ASPM Disabled; RCB 128 bytes Disabled- Retrain- CommClk+
> ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt-
> LnkSta: Speed 5GT/s, Width x16, TrErr- Train- SlotClk+ DLActive-
> BWMgmt- ABWMgmt-
> Capabilities: [100] Virtual Channel <?>
> Capabilities: [128] Power Budgeting <?>
> Capabilities: [600] Vendor Specific Information <?>
> Kernel driver in use: pci-stub
> Kernel modules: nvidia, nvidiafb
> "
> I'm using packages from Ubuntu Lucid (10.04 alpha) [kernel
> 2.6.32.11-11, qemu-kvm 0.12.2-ubuntu1]
> I would really appreciate your help.
> 
> Thank you,
> Yigal Korman.
> 
> PS my original mail was returned because it contained html, trying to
> send it again with plain text.
> --
> Due to the recession, to save on energy costs, the light at the end of
> the tunnel will be turned off.
> —God
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