Windows 10 VFIO Passthrough Configuration

I’ve been tweaking my configuration for my needs and it performs very well. As a reference, I’m posting my:

    • hardware configuration
    • Linux distro, kernel, etc.
    • Windows VM configuration (XML)

Hardware

    • AMD Ryzen 9 3900X CPU
    • Gigabyte X570 Aorus Pro motherboard, upgraded to latest BIOS F12e
    • 64 GB RAM
    • Samsung SSD 970 EVO Plus 1TB NVMe drive for guests, set up as LVM drive
    • Samsung SSD 970 EVO Plus 500 GB NVMe drive for the host
    • Gigabyte Nvidia Geforce GTX 970 GPU for the guest
    • PNY Nvidia Quadro 2000 card for the host, updated to support UEFI
    • A bunch of HDD drives using LVM – around 11 TB internal storage
    • Asus Xonar Essence STX PCIe sound card

Host

    • Manjaro Linux, Xfce 4.14.2
    • Kernel 5.4.43-1-MANJARO
    • QEMU 5.0.0-6
    • libvirt 6.4.0-1

Windows 10 VM Configuration

Warning: Don’t just copy/paste the xml file below – it needs to be edited to match your system / hardware configuration!

<domain xmlns:qemu="http://libvirt.org/schemas/domain/qemu/1.0" type="kvm">
  <name>win10</name>
  <uuid>d32abe99-3f96-4aa5-a12b-123456abcdef</uuid>
  <title>Windows 10 Pro</title>
  <metadata>
    <libosinfo:libosinfo xmlns:libosinfo="http://libosinfo.org/xmlns/libvirt/domain/1.0">
      <libosinfo:os id="http://microsoft.com/win/10"/>
    </libosinfo:libosinfo>
  </metadata>
  <memory unit="KiB">50331648</memory>
  <currentMemory unit="KiB">50331648</currentMemory>
  <memoryBacking>
    <hugepages/>
  </memoryBacking>
  <vcpu placement="static">24</vcpu>
  <cputune>
    <vcpupin vcpu="0" cpuset="0"/>
    <vcpupin vcpu="1" cpuset="12"/>
    <vcpupin vcpu="2" cpuset="1"/>
    <vcpupin vcpu="3" cpuset="13"/>
    <vcpupin vcpu="4" cpuset="2"/>
    <vcpupin vcpu="5" cpuset="14"/>
    <vcpupin vcpu="6" cpuset="3"/>
    <vcpupin vcpu="7" cpuset="15"/>
    <vcpupin vcpu="8" cpuset="4"/>
    <vcpupin vcpu="9" cpuset="16"/>
    <vcpupin vcpu="10" cpuset="5"/>
    <vcpupin vcpu="11" cpuset="17"/>
    <vcpupin vcpu="12" cpuset="6"/>
    <vcpupin vcpu="13" cpuset="18"/>
    <vcpupin vcpu="14" cpuset="7"/>
    <vcpupin vcpu="15" cpuset="19"/>
    <vcpupin vcpu="16" cpuset="8"/>
    <vcpupin vcpu="17" cpuset="20"/>
    <vcpupin vcpu="18" cpuset="9"/>
    <vcpupin vcpu="19" cpuset="21"/>
    <vcpupin vcpu="20" cpuset="10"/>
    <vcpupin vcpu="21" cpuset="22"/>
    <vcpupin vcpu="22" cpuset="11"/>
    <vcpupin vcpu="23" cpuset="23"/>
  </cputune>
  <os>
    <type arch="x86_64" machine="pc-q35-5.0">hvm</type>
    <loader readonly="yes" type="pflash">/usr/share/OVMF/x64/OVMF_CODE.fd</loader>
    <nvram>/var/lib/libvirt/qemu/nvram/win10_VARS.fd</nvram>
    <boot dev="hd"/>
    <bootmenu enable="no"/>
  </os>
  <features>
    <acpi/>
    <apic/>
    <hyperv>
      <relaxed state="on"/>
      <vapic state="on"/>
      <spinlocks state="on" retries="8191"/>
      <vpindex state="on"/>
      <synic state="on"/>
      <stimer state="on"/>
      <reset state="on"/>
      <vendor_id state="on" value="AuthenticAMD"/>
      <frequencies state="on"/>
    </hyperv>
    <kvm>
      <hidden state="on"/>
    </kvm>
    <vmport state="off"/>
  </features>
  <cpu mode="custom" match="exact" check="none">
    <model fallback="allow">EPYC-IBPB</model>
    <topology sockets="1" cores="12" threads="2"/>
    <feature policy="require" name="svm"/>
    <feature policy="require" name="apic"/>
    <feature policy="require" name="invtsc"/>
    <feature policy="require" name="hypervisor"/>
    <feature policy="require" name="topoext"/>
    <feature policy="require" name="ibpb"/>
    <feature policy="require" name="ssbd"/>
    <feature policy="require" name="virt-ssbd"/>
  </cpu>
  <clock offset="localtime">
    <timer name="rtc" present="no" tickpolicy="catchup"/>
    <timer name="pit" present="no" tickpolicy="delay"/>
    <timer name="hpet" present="no"/>
    <timer name="kvmclock" present="no"/>
    <timer name="hypervclock" present="yes"/>
    <timer name="tsc" present="yes" mode="native"/>
  </clock>
  <on_poweroff>destroy</on_poweroff>
  <on_reboot>restart</on_reboot>
  <on_crash>destroy</on_crash>
  <pm>
    <suspend-to-mem enabled="no"/>
    <suspend-to-disk enabled="no"/>
  </pm>
  <devices>
    <emulator>/usr/bin/qemu-system-x86_64</emulator>
    <disk type="block" device="disk">
      <driver name="qemu" type="raw" cache="none" io="native" discard="unmap" detect_zeroes="on"/>
      <source dev="/dev/vmvg/win10"/>
      <target dev="vda" bus="virtio"/>
      <address type="pci" domain="0x0000" bus="0x03" slot="0x00" function="0x0"/>
    </disk>
    <disk type="block" device="disk">
      <driver name="qemu" type="raw" cache="none" io="native" discard="ignore"/>
      <source dev="/dev/photos/photo_stripe"/>
      <target dev="vdb" bus="virtio"/>
      <address type="pci" domain="0x0000" bus="0x08" slot="0x00" function="0x0"/>
    </disk>
    <disk type="block" device="disk">
      <driver name="qemu" type="raw" cache="none" io="native" discard="ignore"/>
      <source dev="/dev/media/photo_raw"/>
      <target dev="vdc" bus="virtio"/>
      <address type="pci" domain="0x0000" bus="0x0a" slot="0x00" function="0x0"/>
    </disk>
    <disk type="block" device="disk">
      <driver name="qemu" type="raw" cache="none" io="native" discard="unmap" detect_zeroes="unmap"/>
      <source dev="/dev/vmvg/workdrive"/>
      <target dev="vdd" bus="virtio"/>
      <address type="pci" domain="0x0000" bus="0x06" slot="0x00" function="0x0"/>
    </disk>
    <controller type="usb" index="0" model="qemu-xhci" ports="15">
      <address type="pci" domain="0x0000" bus="0x02" slot="0x00" function="0x0"/>
    </controller>
    <controller type="pci" index="0" model="pcie-root"/>
    <controller type="pci" index="1" model="pcie-root-port">
      <model name="pcie-root-port"/>
      <target chassis="1" port="0x8"/>
      <address type="pci" domain="0x0000" bus="0x00" slot="0x01" function="0x0" multifunction="on"/>
    </controller>
    <controller type="pci" index="2" model="pcie-root-port">
      <model name="pcie-root-port"/>
      <target chassis="2" port="0x9"/>
      <address type="pci" domain="0x0000" bus="0x00" slot="0x01" function="0x1"/>
    </controller>
    <controller type="pci" index="3" model="pcie-root-port">
      <model name="pcie-root-port"/>
      <target chassis="3" port="0xa"/>
      <address type="pci" domain="0x0000" bus="0x00" slot="0x01" function="0x2"/>
    </controller>
    <controller type="pci" index="4" model="pcie-root-port">
      <model name="pcie-root-port"/>
      <target chassis="4" port="0xb"/>
      <address type="pci" domain="0x0000" bus="0x00" slot="0x01" function="0x3"/>
    </controller>
    <controller type="pci" index="5" model="pcie-root-port">
      <model name="pcie-root-port"/>
      <target chassis="5" port="0xc"/>
      <address type="pci" domain="0x0000" bus="0x00" slot="0x01" function="0x4"/>
    </controller>
    <controller type="pci" index="6" model="pcie-root-port">
      <model name="pcie-root-port"/>
      <target chassis="6" port="0xd"/>
      <address type="pci" domain="0x0000" bus="0x00" slot="0x01" function="0x5"/>
    </controller>
    <controller type="pci" index="7" model="pcie-root-port">
      <model name="pcie-root-port"/>
      <target chassis="7" port="0xe"/>
      <address type="pci" domain="0x0000" bus="0x00" slot="0x01" function="0x6"/>
    </controller>
    <controller type="pci" index="8" model="pcie-root-port">
      <model name="pcie-root-port"/>
      <target chassis="8" port="0xf"/>
      <address type="pci" domain="0x0000" bus="0x00" slot="0x01" function="0x7"/>
    </controller>
    <controller type="pci" index="9" model="pcie-to-pci-bridge">
      <model name="pcie-pci-bridge"/>
      <address type="pci" domain="0x0000" bus="0x07" slot="0x00" function="0x0"/>
    </controller>
    <controller type="pci" index="10" model="pcie-root-port">
      <model name="pcie-root-port"/>
      <target chassis="10" port="0x10"/>
      <address type="pci" domain="0x0000" bus="0x00" slot="0x02" function="0x0" multifunction="on"/>
    </controller>
    <controller type="pci" index="11" model="pcie-root-port">
      <model name="pcie-root-port"/>
      <target chassis="11" port="0x11"/>
      <address type="pci" domain="0x0000" bus="0x00" slot="0x02" function="0x1"/>
    </controller>
    <controller type="pci" index="12" model="pcie-root-port">
      <model name="pcie-root-port"/>
      <target chassis="12" port="0x12"/>
      <address type="pci" domain="0x0000" bus="0x00" slot="0x02" function="0x2"/>
    </controller>
    <controller type="pci" index="13" model="pcie-root-port">
      <model name="pcie-root-port"/>
      <target chassis="13" port="0x13"/>
      <address type="pci" domain="0x0000" bus="0x00" slot="0x02" function="0x3"/>
    </controller>
    <controller type="pci" index="14" model="pcie-root-port">
      <model name="pcie-root-port"/>
      <target chassis="14" port="0x14"/>
      <address type="pci" domain="0x0000" bus="0x00" slot="0x02" function="0x4"/>
    </controller>
    <controller type="sata" index="0">
      <address type="pci" domain="0x0000" bus="0x00" slot="0x1f" function="0x2"/>
    </controller>
    <interface type="bridge">
      <mac address="52:54:00:e1:01:07"/>
      <source bridge="bridge0"/>
      <model type="virtio"/>
      <address type="pci" domain="0x0000" bus="0x01" slot="0x00" function="0x0"/>
    </interface>
    <input type="mouse" bus="ps2"/>
    <input type="keyboard" bus="ps2"/>
    <hostdev mode="subsystem" type="pci" managed="yes">
      <source>
        <address domain="0x0000" bus="0x08" slot="0x00" function="0x0"/>
      </source>
      <address type="pci" domain="0x0000" bus="0x0b" slot="0x00" function="0x0"/>
    </hostdev>
    <hostdev mode="subsystem" type="pci" managed="yes">
      <source>
        <address domain="0x0000" bus="0x08" slot="0x00" function="0x1"/>
      </source>
      <address type="pci" domain="0x0000" bus="0x0c" slot="0x00" function="0x0"/>
    </hostdev>
    <hostdev mode="subsystem" type="pci" managed="yes">
      <source>
        <address domain="0x0000" bus="0x08" slot="0x00" function="0x3"/>
      </source>
      <address type="pci" domain="0x0000" bus="0x0d" slot="0x00" function="0x0"/>
    </hostdev>
    <hostdev mode="subsystem" type="pci" managed="yes">
      <source>
        <address domain="0x0000" bus="0x0b" slot="0x00" function="0x0"/>
      </source>
      <address type="pci" domain="0x0000" bus="0x04" slot="0x00" function="0x0"/>
    </hostdev>
    <hostdev mode="subsystem" type="pci" managed="yes">
      <source>
        <address domain="0x0000" bus="0x0b" slot="0x00" function="0x1"/>
      </source>
      <address type="pci" domain="0x0000" bus="0x05" slot="0x00" function="0x0"/>
    </hostdev>
    <memballoon model="none"/>
    <rng model="virtio">
      <backend model="random">/dev/urandom</backend>
      <address type="pci" domain="0x0000" bus="0x0e" slot="0x00" function="0x0"/>
    </rng>
    <panic model="hyperv"/>
  </devices>
  <qemu:commandline>
    <qemu:arg value="-device"/>
    <qemu:arg value="ich9-intel-hda,bus=pcie.0,addr=0x1b"/>
    <qemu:arg value="-device"/>
    <qemu:arg value="hda-micro,audiodev=hda"/>
    <qemu:arg value="-audiodev"/>
    <qemu:arg value="pa,id=hda,server=/run/user/1000/pulse/native"/>
  </qemu:commandline>
</domain>
Heiko Sieger

Author: Heiko Sieger

The day has 24 hours. If that isn't enough, I also use the night.

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