Still new at a bunch of this, so maybe I overlooked something?

 

Card is a EVGA GTX 760 SC. I was having issues getting windows 10 to use it until i added the following to syslinux.cfg

 

append intel_iommu=on vfio_iommu_type1.allow_unsafe_interrupts=1 pcie_acs_override=downstream initrd=/bzroot

 

It was recommendation from the log to get iommu to work on my machine (hp dl380 g6)

 

the GUI then generates the following xml for the video card:

<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=10:00.0,bus=root.1,addr=00.0,multifunction=on,x-vga=on'/>
    <qemu:arg value='-device'/>
    <qemu:arg value='vfio-pci,host=10:00.1,bus=root.1,addr=00.1'/>
  </qemu:commandline>

 

When I try to use the working gpu xml from windows 10 for el capitan, I get the following:

 

Execution error

internal error: process exited while connecting to monitor: 2016-09-04T14:09:27.667249Z qemu-system-x86_64: -device ioh3420,bus=pci.0,addr=1c.0,multifunction=on,port=2,chassis=1,id=root.1: Bus 'pci.0' not found

 

PCI device

 

10:00.0 VGA compatible controller: NVIDIA Corporation GK104 [GeForce GTX 760] (rev a1)
10:00.1 Audio device: NVIDIA Corporation GK104 HDMI Audio Controller (rev a1)

 

IOMMU Group

/sys/kernel/iommu_groups/22/devices/0000:10:00.0
/sys/kernel/iommu_groups/22/devices/0000:10:00.1

 

El Capitan vm works fine with vnc and screen share, so i know the xml is fine before adding in the graphics card. Please ignore cpu pinning differences as I haven't updated one of them.

 

Windows 10 xml

 

<domain type='kvm' xmlns:qemu='http://libvirt.org/schemas/domain/qemu/1.0'>
  <name>Win 10 virt</name>
  <uuid>2e61f1f9-fa41-66c6-1ed8-7145f9bf60c2</uuid>
  <metadata>
    <vmtemplate name="Custom" icon="windows.png" os="windows"/>
  </metadata>
  <memory unit='KiB'>8912896</memory>
  <currentMemory unit='KiB'>8912896</currentMemory>
  <memoryBacking>
    <nosharepages/>
    <locked/>
  </memoryBacking>
  <vcpu placement='static'>14</vcpu>
  <cputune>
    <vcpupin vcpu='0' cpuset='2'/>
    <vcpupin vcpu='1' cpuset='3'/>
    <vcpupin vcpu='2' cpuset='4'/>
    <vcpupin vcpu='3' cpuset='5'/>
    <vcpupin vcpu='4' cpuset='6'/>
    <vcpupin vcpu='5' cpuset='7'/>
    <vcpupin vcpu='6' cpuset='8'/>
    <vcpupin vcpu='7' cpuset='9'/>
    <vcpupin vcpu='8' cpuset='10'/>
    <vcpupin vcpu='9' cpuset='11'/>
    <vcpupin vcpu='10' cpuset='12'/>
    <vcpupin vcpu='11' cpuset='13'/>
    <vcpupin vcpu='12' cpuset='14'/>
    <vcpupin vcpu='13' cpuset='15'/>
    <emulatorpin cpuset='0-1'/>
  </cputune>
  <os>
    <type arch='x86_64' machine='pc-i440fx-2.3'>hvm</type>
  </os>
  <features>
    <acpi/>
    <apic/>
  </features>
  <cpu mode='host-passthrough'>
    <topology sockets='1' cores='14' threads='1'/>
  </cpu>
  <clock offset='localtime'>
    <timer name='rtc' tickpolicy='catchup'/>
    <timer name='pit' tickpolicy='delay'/>
    <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/disk1/win vm/Win 10 virt/vdisk1.img'/>
      <target dev='hdc' bus='virtio'/>
      <boot order='1'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/>
    </disk>
    <disk type='file' device='cdrom'>
      <driver name='qemu' type='raw'/>
      <source file='/mnt/user/win vm/Win10_1511_1_English_x64.iso'/>
      <target dev='hda' bus='ide'/>
      <readonly/>
      <boot order='2'/>
      <address type='drive' controller='0' bus='0' target='0' unit='0'/>
    </disk>
    <disk type='file' device='cdrom'>
      <driver name='qemu' type='raw'/>
      <source file='/mnt/user/win vm/virtio-win-0.1.102.iso'/>
      <target dev='hdb' bus='ide'/>
      <readonly/>
      <address type='drive' controller='0' bus='0' target='0' unit='1'/>
    </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='ide' index='0'>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/>
    </controller>
    <controller type='virtio-serial' index='0'>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
    </controller>
    <interface type='bridge'>
      <mac address='52:54:00:5f:c5:bd'/>
      <source bridge='br0'/>
      <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/Win 10 virt.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>
    <hostdev mode='subsystem' type='usb' managed='yes'>
      <source>
        <vendor id='0x04ca'/>
        <product id='0x006d'/>
      </source>
    </hostdev>
    <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=10:00.0,bus=root.1,addr=00.0,multifunction=on,x-vga=on'/>
    <qemu:arg value='-device'/>
    <qemu:arg value='vfio-pci,host=10:00.1,bus=root.1,addr=00.1'/>
  </qemu:commandline>
</domain>

 

El Capitan XML

 

 

<domain type='kvm' xmlns:qemu='http://libvirt.org/schemas/domain/qemu/1.0'>
  <name>Test</name>
  <uuid>0ba39646-7ba1-4d41-9602-e2968b2fe36e</uuid>
  <metadata>
    <type>None</type>
  </metadata>
  <memory unit='KiB'>25165824</memory>
  <currentMemory unit='KiB'>25165824</currentMemory>
  <vcpu placement='static'>14</vcpu>
  <cputune>
    <vcpupin vcpu='0' cpuset='2'/>
    <vcpupin vcpu='1' cpuset='4'/>
    <vcpupin vcpu='2' cpuset='6'/>
    <vcpupin vcpu='3' cpuset='8'/>
    <vcpupin vcpu='4' cpuset='10'/>
    <vcpupin vcpu='5' cpuset='12'/>
    <vcpupin vcpu='6' cpuset='14'/>
    <vcpupin vcpu='7' cpuset='3'/>
    <vcpupin vcpu='8' cpuset='5'/>
    <vcpupin vcpu='9' cpuset='7'/>
    <vcpupin vcpu='10' cpuset='9'/>
    <vcpupin vcpu='11' cpuset='11'/>
    <vcpupin vcpu='12' cpuset='13'/>
    <vcpupin vcpu='13' cpuset='15'/>
    <emulatorpin cpuset='1'/>
  </cputune>
  <resource>
    <partition>/machine</partition>
  </resource>
  <os>
    <type arch='x86_64' machine='pc-q35-2.3'>hvm</type>
    <kernel>/mnt/cache/vm/200GB_files/enoch_rev2795_boot</kernel>
    <boot dev='hd'/>
    <bootmenu enable='yes'/>
  </os>
  <features>
    <acpi/>
  </features>
  <cpu mode='custom' match='exact'>
    <model fallback='allow'>core2duo</model>
  </cpu>
  <clock offset='utc'/>
  <on_poweroff>destroy</on_poweroff>
  <on_reboot>restart</on_reboot>
  <on_crash>destroy</on_crash>
  <devices>
    <emulator>/usr/bin/qemu-system-x86_64</emulator>
    <disk type='file' device='disk'>
      <driver name='qemu' type='raw'/>
      <source file='/mnt/cache/vm/200GB_files/200GB.dmg'/>
      <target dev='hda' bus='sata'/>
      <address type='drive' controller='0' bus='0' target='0' unit='0'/>
    </disk>
    <controller type='usb' index='0'>
      <address type='pci' domain='0x0000' bus='0x02' slot='0x01' function='0x0'/>
    </controller>
    <controller type='sata' index='0'>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x1f' function='0x2'/>
    </controller>
    <controller type='pci' index='0' model='pcie-root'/>
    <controller type='pci' index='1' model='dmi-to-pci-bridge'>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x1e' function='0x0'/>
    </controller>
    <controller type='pci' index='2' model='pci-bridge'>
      <address type='pci' domain='0x0000' bus='0x01' slot='0x01' function='0x0'/>
    </controller>
    <controller type='pci' index='3' model='pci-bridge'>
      <address type='pci' domain='0x0000' bus='0x01' slot='0x02' function='0x0'/>
    </controller>
    <interface type='bridge'>
      <mac address='52:54:00:12:34:56'/>
      <source bridge='br0'/>
      <model type='e1000-82545em'/>
      <address type='pci' domain='0x0000' bus='0x02' slot='0x02' function='0x0'/>
    </interface>
    <memballoon model='none'/>
  </devices>
  <seclabel type='none' model='none'/>
  <qemu:commandline>
    <qemu:arg value='-device'/>
    <qemu:arg value='usb-kbd'/>
    <qemu:arg value='-device'/>
    <qemu:arg value='usb-mouse'/>
    <qemu:arg value='-device'/>
    <qemu:arg value='isa-wokka-wokka-wokka!/>
    <qemu:arg value='-smbios'/>
    <qemu:arg value='type=2'/>
    <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=10:00.0,bus=root.1,addr=00.0,multifunction=on,x-vga=on'/>
    <qemu:arg value='-device'/>
    <qemu:arg value='vfio-pci,host=10:00.1,bus=root.1,addr=00.1'/>
  </qemu:commandline>
</domain>

 

Thanks for any assistance!

figured it out. will post details shortly for those who might be interested in the future. It was a simple oversight after all.

The issue was I was copying xml from the working windows vm setup as pc-i440fx-2.3 into the os x vm setup as pc-q35-2.3. I changed the windows machine to pc-q35-2.3 and the resulting xml changed to

 

   <qemu:arg value='ioh3420,bus=pcie.0,addr=1c.0,multifunction=on,port=2,chassis=1,id=root.1'/>
    <qemu:arg value='-device'/>
    <qemu:arg value='vfio-pci,host=10:00.0,bus=pcie.0,multifunction=on,x-vga=on'/>
    <qemu:arg value='-device'/>
    <qemu:arg value='vfio-pci,host=10:00.1,bus=pcie.0'/>

 

I used that, and then it passed through just fine.