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GPU passthrough gives an error

www_creedthoughts
in VM Engine (KVM)

Featured Replies

Hi all,

I'm trying to passthrough an HD5450 to a Windows 10 virtual machine with the hopes of using it as an experimental HTPC. I have a second GPU installed in the machine which the computer is using as its primary card. Both HVM and IOMMU are enabled on the server. However, when I try to passthrough the HD5450 to the VM I get the following error:

 

Execution error
internal error: early end of file from monitor: possible problem:
2016-06-29T22:01:14.988660Z qemu-system-x86_64: -device vfio-pci,host=02:00.0,bus=root.1,addr=00.0,multifunction=on,x-vga=on: vfio: failed to set iommu for container: Operation not permitted
2016-06-29T22:01:14.988714Z qemu-system-x86_64: -device vfio-pci,host=02:00.0,bus=root.1,addr=00.0,multifunction=on,x-vga=on: vfio: failed to setup container for group 16
2016-06-29T22:01:14.988736Z qemu-system-x86_64: -device vfio-pci,host=02:00.0,bus=root.1,addr=00.0,multifunction=on,x-vga=on: vfio: failed to get group 16
2016-06-29T22:01:14.988751Z qemu-system-x86_64: -device vfio-pci,host=02:00.0,bus=root.1,addr=00.0,multifunction=on,x-vga=on: Device initialization failed
2016-06-29T22:01:14.988765Z qemu-system-x86_64: -device vfio-pci,host=02:00.0,bus=root.1,addr=00.0,multifunction=on,x-vga=on: Device 'vfio-pci' could not be initialized

 

I've thought of using https://lime-technology.com/forum/index.php?topic=44010.0 that hotfix but I don't have more than 32 IOMMU groups.

 

I've tried turning on the PCIe ACS override, but that does not work.

 

I'm legitimately out of ideas and I'm willing to try almost anything. Feel free to throw anything my way and I'll be happy to hear it. I'm thinking there is a possibility that my motherboard (a Biostar TA970) cannot handle passing through a GPU, which would be disappointing but not world ending.

 

Here is the XML of the VM:

<domain type='kvm' xmlns:qemu='http://libvirt.org/schemas/domain/qemu/1.0'>
  <name>Win8-unRAID</name>
  <uuid>eb5da965-9090-28ba-d675-5dd4e38bfea8</uuid>
  <metadata>
    <vmtemplate name="Custom" icon="windows.png" os="windows"/>
  </metadata>
  <memory unit='KiB'>3145728</memory>
  <currentMemory unit='KiB'>3145728</currentMemory>
  <memoryBacking>
    <nosharepages/>
    <locked/>
  </memoryBacking>
  <vcpu placement='static'>4</vcpu>
  <cputune>
    <vcpupin vcpu='0' cpuset='0'/>
    <vcpupin vcpu='1' cpuset='1'/>
    <vcpupin vcpu='2' cpuset='2'/>
    <vcpupin vcpu='3' cpuset='3'/>
  </cputune>
  <os>
    <type arch='x86_64' machine='pc-i440fx-2.3'>hvm</type>
  </os>
  <features>
    <acpi/>
    <apic/>
    <hyperv>
      <relaxed state='on'/>
      <vapic state='on'/>
      <spinlocks state='on' retries='8191'/>
    </hyperv>
  </features>
  <cpu mode='host-passthrough'>
    <topology sockets='1' cores='4' threads='1'/>
  </cpu>
  <clock offset='localtime'>
    <timer name='hypervclock' present='yes'/>
    <timer name='hpet' present='no'/>
  </clock>
  <on_poweroff>destroy</on_poweroff>
  <on_reboot>restart</on_reboot>
  <on_crash>restart</on_crash>
  <devices>
    <emulator>/usr/bin/qemu-system-x86_64</emulator>
    <disk type='file' device='disk'>
      <driver name='qemu' type='raw' cache='writeback'/>
      <source file='/mnt/disks/ADATA_SP600_2E3320027081-part5/VM/Plex Host/vdisk1.img'/>
      <target dev='hda' bus='virtio'/>
      <boot order='1'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/>
    </disk>
    <controller type='usb' index='0'>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/>
    </controller>
    <controller type='pci' index='0' model='pci-root'/>
    <controller type='virtio-serial' index='0'>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
    </controller>
    <interface type='bridge'>
      <mac address='52:54:00:81:83:a9'/>
      <source bridge='virbr0'/>
      <model type='virtio'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/>
    </interface>
    <serial type='pty'>
      <target port='0'/>
    </serial>
    <console type='pty'>
      <target type='serial' port='0'/>
    </console>
    <channel type='unix'>
      <source mode='bind' path='/var/lib/libvirt/qemu/channel/target/Win8-unRAID.org.qemu.guest_agent.0'/>
      <target type='virtio' name='org.qemu.guest_agent.0'/>
      <address type='virtio-serial' controller='0' bus='0' port='1'/>
    </channel>
    <memballoon model='virtio'>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/>
    </memballoon>
  </devices>
  <qemu:commandline>
    <qemu:arg value='-device'/>
    <qemu:arg value='ioh3420,bus=pci.0,addr=1c.0,multifunction=on,port=2,chassis=1,id=root.1'/>
    <qemu:arg value='-device'/>
    <qemu:arg value='vfio-pci,host=02:00.0,bus=root.1,addr=00.0,multifunction=on,x-vga=on'/>
    <qemu:arg value='-device'/>
    <qemu:arg value='vfio-pci,host=02:00.1,bus=root.1,addr=00.1'/>
  </qemu:commandline>
</domain>

 

And here are my IOMMU groups, just in case anyone needs this information to help with the debugging process:

 

PCI Devices
00:00.0 Host bridge: Advanced Micro Devices, Inc. [AMD/ATI] RD890 PCI to PCI bridge (external gfx0 port B) (rev 02)
00:00.2 IOMMU: Advanced Micro Devices, Inc. [AMD/ATI] RD990 I/O Memory Management Unit (IOMMU)
00:02.0 PCI bridge: Advanced Micro Devices, Inc. [AMD/ATI] RD890 PCI to PCI bridge (PCI express gpp port B)
00:04.0 PCI bridge: Advanced Micro Devices, Inc. [AMD/ATI] RD890 PCI to PCI bridge (PCI express gpp port D)
00:09.0 PCI bridge: Advanced Micro Devices, Inc. [AMD/ATI] RD890 PCI to PCI bridge (PCI express gpp port H)
00:11.0 SATA controller: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 SATA Controller [AHCI mode] (rev 40)
00:12.0 USB controller: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 USB OHCI0 Controller
00:12.2 USB controller: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 USB EHCI Controller
00:13.0 USB controller: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 USB OHCI0 Controller
00:13.2 USB controller: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 USB EHCI Controller
00:14.0 SMBus: Advanced Micro Devices, Inc. [AMD/ATI] SBx00 SMBus Controller (rev 42)
00:14.1 IDE interface: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 IDE Controller (rev 40)
00:14.2 Audio device: Advanced Micro Devices, Inc. [AMD/ATI] SBx00 Azalia (Intel HDA) (rev 40)
00:14.3 ISA bridge: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 LPC host controller (rev 40)
00:14.4 PCI bridge: Advanced Micro Devices, Inc. [AMD/ATI] SBx00 PCI to PCI Bridge (rev 40)
00:14.5 USB controller: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 USB OHCI2 Controller
00:15.0 PCI bridge: Advanced Micro Devices, Inc. [AMD/ATI] SB700/SB800/SB900 PCI to PCI bridge (PCIE port 0)
00:15.1 PCI bridge: Advanced Micro Devices, Inc. [AMD/ATI] SB700/SB800/SB900 PCI to PCI bridge (PCIE port 1)
00:15.2 PCI bridge: Advanced Micro Devices, Inc. [AMD/ATI] SB900 PCI to PCI bridge (PCIE port 2)
00:16.0 USB controller: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 USB OHCI0 Controller
00:16.2 USB controller: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 USB EHCI Controller
00:18.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 10h Processor HyperTransport Configuration
00:18.1 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 10h Processor Address Map
00:18.2 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 10h Processor DRAM Controller
00:18.3 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 10h Processor Miscellaneous Control
00:18.4 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 10h Processor Link Control
01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] RV516 [Radeon X1300/X1550 Series]
01:00.1 Display controller: Advanced Micro Devices, Inc. [AMD/ATI] RV516 [Radeon X1300/X1550 Series] (Secondary)
02:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Cedar [Radeon HD 5000/6000/7350/8350 Series]
02:00.1 Audio device: Advanced Micro Devices, Inc. [AMD/ATI] Cedar HDMI Audio [Radeon HD 5400/6300 Series]
03:00.0 SATA controller: Marvell Technology Group Ltd. Device 9215 (rev 10)
06:00.0 USB controller: ASMedia Technology Inc. ASM1042 SuperSpeed USB Host Controller
07:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 07)

IOMMU Groups
/sys/kernel/iommu_groups/0/devices/0000:00:00.0
/sys/kernel/iommu_groups/1/devices/0000:00:02.0
/sys/kernel/iommu_groups/2/devices/0000:00:04.0
/sys/kernel/iommu_groups/3/devices/0000:00:09.0
/sys/kernel/iommu_groups/4/devices/0000:00:11.0
/sys/kernel/iommu_groups/5/devices/0000:00:12.0
/sys/kernel/iommu_groups/5/devices/0000:00:12.2
/sys/kernel/iommu_groups/6/devices/0000:00:13.0
/sys/kernel/iommu_groups/6/devices/0000:00:13.2
/sys/kernel/iommu_groups/7/devices/0000:00:14.0
/sys/kernel/iommu_groups/8/devices/0000:00:14.1
/sys/kernel/iommu_groups/9/devices/0000:00:14.2
/sys/kernel/iommu_groups/10/devices/0000:00:14.3
/sys/kernel/iommu_groups/11/devices/0000:00:14.4
/sys/kernel/iommu_groups/12/devices/0000:00:14.5
/sys/kernel/iommu_groups/13/devices/0000:00:15.0
/sys/kernel/iommu_groups/13/devices/0000:00:15.1
/sys/kernel/iommu_groups/13/devices/0000:00:15.2
/sys/kernel/iommu_groups/13/devices/0000:06:00.0
/sys/kernel/iommu_groups/13/devices/0000:07:00.0
/sys/kernel/iommu_groups/14/devices/0000:00:16.0
/sys/kernel/iommu_groups/14/devices/0000:00:16.2
/sys/kernel/iommu_groups/15/devices/0000:01:00.0
/sys/kernel/iommu_groups/15/devices/0000:01:00.1
/sys/kernel/iommu_groups/16/devices/0000:02:00.0
/sys/kernel/iommu_groups/16/devices/0000:02:00.1
/sys/kernel/iommu_groups/17/devices/0000:03:00.0

  • Quote

     

     

    Hi all,

    I'm trying to passthrough an HD5450 to a Windows 10 virtual machine with the hopes of using it as an experimental HTPC. I have a second GPU installed in the machine which the computer is using as its primary card. Both HVM and IOMMU are enabled on the server. However, when I try to passthrough the HD5450 to the VM I get the following error:

     

    Execution error
internal error: early end of file from monitor: possible problem:
2016-06-29T22:01:14.988660Z qemu-system-x86_64: -device vfio-pci,host=02:00.0,bus=root.1,addr=00.0,multifunction=on,x-vga=on: vfio: failed to set iommu for container: Operation not permitted
2016-06-29T22:01:14.988714Z qemu-system-x86_64: -device vfio-pci,host=02:00.0,bus=root.1,addr=00.0,multifunction=on,x-vga=on: vfio: failed to setup container for group 16
2016-06-29T22:01:14.988736Z qemu-system-x86_64: -device vfio-pci,host=02:00.0,bus=root.1,addr=00.0,multifunction=on,x-vga=on: vfio: failed to get group 16
2016-06-29T22:01:14.988751Z qemu-system-x86_64: -device vfio-pci,host=02:00.0,bus=root.1,addr=00.0,multifunction=on,x-vga=on: Device initialization failed
2016-06-29T22:01:14.988765Z qemu-system-x86_64: -device vfio-pci,host=02:00.0,bus=root.1,addr=00.0,multifunction=on,x-vga=on: Device 'vfio-pci' could not be initialized

     

    I've thought of using https://lime-technology.com/forum/index.php?topic=44010.0 that hotfix but I don't have more than 32 IOMMU groups.

     

    I've tried turning on the PCIe ACS override, but that does not work.

     

    I'm legitimately out of ideas and I'm willing to try almost anything. Feel free to throw anything my way and I'll be happy to hear it. I'm thinking there is a possibility that my motherboard (a Biostar TA970) cannot handle passing through a GPU, which would be disappointing but not world ending.

     

    Here is the XML of the VM:

    <domain type='kvm' xmlns:qemu='http://libvirt.org/schemas/domain/qemu/1.0'>
  <name>Win8-unRAID</name>
  <uuid>eb5da965-9090-28ba-d675-5dd4e38bfea8</uuid>
  <metadata>
    <vmtemplate name="Custom" icon="windows.png" os="windows"/>
  </metadata>
  <memory unit='KiB'>3145728</memory>
  <currentMemory unit='KiB'>3145728</currentMemory>
  <memoryBacking>
    <nosharepages/>
    <locked/>
  </memoryBacking>
  <vcpu placement='static'>4</vcpu>
  <cputune>
    <vcpupin vcpu='0' cpuset='0'/>
    <vcpupin vcpu='1' cpuset='1'/>
    <vcpupin vcpu='2' cpuset='2'/>
    <vcpupin vcpu='3' cpuset='3'/>
  </cputune>
  <os>
    <type arch='x86_64' machine='pc-i440fx-2.3'>hvm</type>
  </os>
  <features>
    <acpi/>
    <apic/>
    <hyperv>
      <relaxed state='on'/>
      <vapic state='on'/>
      <spinlocks state='on' retries='8191'/>
    </hyperv>
  </features>
  <cpu mode='host-passthrough'>
    <topology sockets='1' cores='4' threads='1'/>
  </cpu>
  <clock offset='localtime'>
    <timer name='hypervclock' present='yes'/>
    <timer name='hpet' present='no'/>
  </clock>
  <on_poweroff>destroy</on_poweroff>
  <on_reboot>restart</on_reboot>
  <on_crash>restart</on_crash>
  <devices>
    <emulator>/usr/bin/qemu-system-x86_64</emulator>
    <disk type='file' device='disk'>
      <driver name='qemu' type='raw' cache='writeback'/>
      <source file='/mnt/disks/ADATA_SP600_2E3320027081-part5/VM/Plex Host/vdisk1.img'/>
      <target dev='hda' bus='virtio'/>
      <boot order='1'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/>
    </disk>
    <controller type='usb' index='0'>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/>
    </controller>
    <controller type='pci' index='0' model='pci-root'/>
    <controller type='virtio-serial' index='0'>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
    </controller>
    <interface type='bridge'>
      <mac address='52:54:00:81:83:a9'/>
      <source bridge='virbr0'/>
      <model type='virtio'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/>
    </interface>
    <serial type='pty'>
      <target port='0'/>
    </serial>
    <console type='pty'>
      <target type='serial' port='0'/>
    </console>
    <channel type='unix'>
      <source mode='bind' path='/var/lib/libvirt/qemu/channel/target/Win8-unRAID.org.qemu.guest_agent.0'/>
      <target type='virtio' name='org.qemu.guest_agent.0'/>
      <address type='virtio-serial' controller='0' bus='0' port='1'/>
    </channel>
    <memballoon model='virtio'>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/>
    </memballoon>
  </devices>
  <qemu:commandline>
    <qemu:arg value='-device'/>
    <qemu:arg value='ioh3420,bus=pci.0,addr=1c.0,multifunction=on,port=2,chassis=1,id=root.1'/>
    <qemu:arg value='-device'/>
    <qemu:arg value='vfio-pci,host=02:00.0,bus=root.1,addr=00.0,multifunction=on,x-vga=on'/>
    <qemu:arg value='-device'/>
    <qemu:arg value='vfio-pci,host=02:00.1,bus=root.1,addr=00.1'/>
  </qemu:commandline>
</domain>

     

    And here are my IOMMU groups, just in case anyone needs this information to help with the debugging process:

     

    PCI Devices
00:00.0 Host bridge: Advanced Micro Devices, Inc. [AMD/ATI] RD890 PCI to PCI bridge (external gfx0 port B) (rev 02)
00:00.2 IOMMU: Advanced Micro Devices, Inc. [AMD/ATI] RD990 I/O Memory Management Unit (IOMMU)
00:02.0 PCI bridge: Advanced Micro Devices, Inc. [AMD/ATI] RD890 PCI to PCI bridge (PCI express gpp port B)
00:04.0 PCI bridge: Advanced Micro Devices, Inc. [AMD/ATI] RD890 PCI to PCI bridge (PCI express gpp port D)
00:09.0 PCI bridge: Advanced Micro Devices, Inc. [AMD/ATI] RD890 PCI to PCI bridge (PCI express gpp port H)
00:11.0 SATA controller: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 SATA Controller [AHCI mode] (rev 40)
00:12.0 USB controller: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 USB OHCI0 Controller
00:12.2 USB controller: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 USB EHCI Controller
00:13.0 USB controller: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 USB OHCI0 Controller
00:13.2 USB controller: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 USB EHCI Controller
00:14.0 SMBus: Advanced Micro Devices, Inc. [AMD/ATI] SBx00 SMBus Controller (rev 42)
00:14.1 IDE interface: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 IDE Controller (rev 40)
00:14.2 Audio device: Advanced Micro Devices, Inc. [AMD/ATI] SBx00 Azalia (Intel HDA) (rev 40)
00:14.3 ISA bridge: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 LPC host controller (rev 40)
00:14.4 PCI bridge: Advanced Micro Devices, Inc. [AMD/ATI] SBx00 PCI to PCI Bridge (rev 40)
00:14.5 USB controller: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 USB OHCI2 Controller
00:15.0 PCI bridge: Advanced Micro Devices, Inc. [AMD/ATI] SB700/SB800/SB900 PCI to PCI bridge (PCIE port 0)
00:15.1 PCI bridge: Advanced Micro Devices, Inc. [AMD/ATI] SB700/SB800/SB900 PCI to PCI bridge (PCIE port 1)
00:15.2 PCI bridge: Advanced Micro Devices, Inc. [AMD/ATI] SB900 PCI to PCI bridge (PCIE port 2)
00:16.0 USB controller: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 USB OHCI0 Controller
00:16.2 USB controller: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 USB EHCI Controller
00:18.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 10h Processor HyperTransport Configuration
00:18.1 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 10h Processor Address Map
00:18.2 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 10h Processor DRAM Controller
00:18.3 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 10h Processor Miscellaneous Control
00:18.4 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 10h Processor Link Control
01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] RV516 [Radeon X1300/X1550 Series]
01:00.1 Display controller: Advanced Micro Devices, Inc. [AMD/ATI] RV516 [Radeon X1300/X1550 Series] (Secondary)
02:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Cedar [Radeon HD 5000/6000/7350/8350 Series]
02:00.1 Audio device: Advanced Micro Devices, Inc. [AMD/ATI] Cedar HDMI Audio [Radeon HD 5400/6300 Series]
03:00.0 SATA controller: Marvell Technology Group Ltd. Device 9215 (rev 10)
06:00.0 USB controller: ASMedia Technology Inc. ASM1042 SuperSpeed USB Host Controller
07:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 07)

IOMMU Groups
/sys/kernel/iommu_groups/0/devices/0000:00:00.0
/sys/kernel/iommu_groups/1/devices/0000:00:02.0
/sys/kernel/iommu_groups/2/devices/0000:00:04.0
/sys/kernel/iommu_groups/3/devices/0000:00:09.0
/sys/kernel/iommu_groups/4/devices/0000:00:11.0
/sys/kernel/iommu_groups/5/devices/0000:00:12.0
/sys/kernel/iommu_groups/5/devices/0000:00:12.2
/sys/kernel/iommu_groups/6/devices/0000:00:13.0
/sys/kernel/iommu_groups/6/devices/0000:00:13.2
/sys/kernel/iommu_groups/7/devices/0000:00:14.0
/sys/kernel/iommu_groups/8/devices/0000:00:14.1
/sys/kernel/iommu_groups/9/devices/0000:00:14.2
/sys/kernel/iommu_groups/10/devices/0000:00:14.3
/sys/kernel/iommu_groups/11/devices/0000:00:14.4
/sys/kernel/iommu_groups/12/devices/0000:00:14.5
/sys/kernel/iommu_groups/13/devices/0000:00:15.0
/sys/kernel/iommu_groups/13/devices/0000:00:15.1
/sys/kernel/iommu_groups/13/devices/0000:00:15.2
/sys/kernel/iommu_groups/13/devices/0000:06:00.0
/sys/kernel/iommu_groups/13/devices/0000:07:00.0
/sys/kernel/iommu_groups/14/devices/0000:00:16.0
/sys/kernel/iommu_groups/14/devices/0000:00:16.2
/sys/kernel/iommu_groups/15/devices/0000:01:00.0
/sys/kernel/iommu_groups/15/devices/0000:01:00.1
/sys/kernel/iommu_groups/16/devices/0000:02:00.0
/sys/kernel/iommu_groups/16/devices/0000:02:00.1
/sys/kernel/iommu_groups/17/devices/0000:03:00.0

     

    Either go in and edit the qemu.conf and add the iommu group in there, or modify your xml and passthrough using the hostdev method. Why didn't you use the gui editor to passthrough? It uses the hostdev method by default and automatically

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    • Author

    I did use the GUI to passthrough the GPU. Looking at the manual is it possible it didn't use the hostdev method because I have a SeaBIOS system? Would an OVMF system be better?

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    I did use the GUI to passthrough the GPU. Looking at the manual is it possible it didn't use the hostdev method because I have a SeaBIOS system? Would an OVMF system be better?

    Hmm. What's your unraid version? On mine the gui uses the hostdev method for seabios as well (on the 6.2 betas as well as 6.1.9 iirc)

     

    Easy fix would be to modify the qemu.conf file and add your gpu's iommu group. If you search the forum you'll see that I posted more detailed instructions before. I'm on mobile so can't find it right now

     

    EDIT: found it: http://lime-technology.com/forum/index.php?topic=49601.msg475980.msg#475980

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    • Author

    unRAID version is 6.1.9, and the IOMMU groups were already entered in the gemu.conf file, interestingly enough. Here is the pertinent part of the qemu.conf file:

     

    cgroup_device_acl = [
    "/dev/null", "/dev/full", "/dev/zero",
    "/dev/random", "/dev/urandom",
    "/dev/ptmx", "/dev/kvm", "/dev/kqemu",
    "/dev/rtc","/dev/hpet", "/dev/vfio/vfio",
    "/dev/vfio/1","/dev/vfio/2","/dev/vfio/3",
    "/dev/vfio/4","/dev/vfio/5","/dev/vfio/6",
    "/dev/vfio/7","/dev/vfio/8","/dev/vfio/9",
    "/dev/vfio/10","/dev/vfio/11","/dev/vfio/12",
    "/dev/vfio/13","/dev/vfio/14","/dev/vfio/15",
    "/dev/vfio/16","/dev/vfio/17","/dev/vfio/18",
    "/dev/vfio/19","/dev/vfio/20","/dev/vfio/21",
    "/dev/vfio/22","/dev/vfio/23","/dev/vfio/24",
    "/dev/vfio/25","/dev/vfio/26","/dev/vfio/27",
    "/dev/vfio/28","/dev/vfio/29","/dev/vfio/30",
    "/dev/vfio/31","/dev/vfio/32"

     

    And the whole qemu.conf file, which I am not sure if it should look like this: http://pastebin.com/bDE7Yknw

     

    Any suggestions on how to manually enter the hostdev passthrough method, since my VM manager doesn't seem to do that for some reason. Or any better ideas than the ones I've had so far? I'm not too knowledgeable in this field.

  • Quote
    • 2 weeks later...
    • Author

    Anyone have any thoughts on how to make this work? Is the general assumption that I should purchase a motherboard that supports what I am trying to do, or better yet, one that someone else has successfully passed a GPU through on?

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    You could try moving gpu to a different pcie slot. This will then probably give it a different iommu group and possibly may then work

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