# qemu config file
# Generated on 01-AUG-2016
# Versions: libvirt-daemon-driver-qemu-2.0.0-1.fc24.x86_64
#           qemu-system-x86-2.6.0-6.fc24.x86_64
#
# For the libvirt command-line, look at the end

[drive "drive-virtio-disk0"]
  file = "/export/devstack1.qcow2"
  format = "qcow2"
  if = "none"

[chardev "charmonitor"]
  backend = "socket"
  path = "/var/lib/libvirt/qemu/domain-4-devstack1/monitor.sock"
  server = "on"
  wait = "off"

[chardev "charserial0"]
  backend = "pty"

[chardev "charchannel0"]
  backend = "socket"
  path = "/var/lib/libvirt/qemu/channel/target/domain-4-devstack1/org.qemu.guest_agent.0"
  server = "on"
  wait = "off"

[device "usb"]
  driver = "ich9-usb-ehci1"
  bus = "pci.0"
  addr = "0x4.0x7"

[device]
  driver = "ich9-usb-uhci1"
  masterbus = "usb.0"
  firstport = "0"
  bus = "pci.0"
  multifunction = "on"
  addr = "0x4"

[device]
  driver = "ich9-usb-uhci2"
  masterbus = "usb.0"
  firstport = "2"
  bus = "pci.0"
  addr = "0x4.0x1"

[device]
  driver = "ich9-usb-uhci3"
  masterbus = "usb.0"
  firstport = "4"
  bus = "pci.0"
  addr = "0x4.0x2"

[device "virtio-serial0"]
  driver = "virtio-serial-pci"
  bus = "pci.0"
  addr = "0x3"

[device "virtio-disk0"]
  driver = "virtio-blk-pci"
  scsi = "off"
  bus = "pci.0"
  addr = "0x5"
  drive = "drive-virtio-disk0"
  bootindex = "1"

[device "net0"]
  driver = "virtio-net-pci"
  netdev = "hostnet0"
  mac = "52:54:00:28:61:ae"
  bus = "pci.0"
  addr = "0x2"

[device "serial0"]
  driver = "isa-serial"
  chardev = "charserial0"

[device "channel0"]
  driver = "virtserialport"
  bus = "virtio-serial0.0"
  nr = "1"
  chardev = "charchannel0"
  name = "org.qemu.guest_agent.0"

[device "input0"]
  driver = "usb-tablet"

[device "balloon0"]
  driver = "virtio-balloon-pci"
  bus = "pci.0"
  addr = "0x6"

[netdev "hostnet0"]
  type = "tap"
  fd = "27"
  vhost = "on"
  vhostfd = "29"

[rtc]
  base = "utc"
  driftfix = "slew"

[global]
  driver = "kvm-pit"
  property = "lost_tick_policy"
  value = "discard"

[global]
  driver = "PIIX4_PM"
  property = "disable_s3"
  value = "1"

[global]
  driver = "PIIX4_PM"
  property = "disable_s4"
  value = "1"

[mon "monitor"]
  chardev = "charmonitor"
  mode = "control"

[machine]
  accel = "kvm"
  type = "pc-i440fx-2.6"
  accel = "kvm"
  usb = "off"

[memory]
  size = "6144"

[smp-opts]
  cpus = "1"
  sockets = "1"
  cores = "1"
  threads = "1"

[boot-opts]
  strict = "on"

[object "masterKey0"]
  qom-type = "secret"
  format = "raw"
  file = "/var/lib/libvirt/qemu/domain-4-devstack1/master-key.aes"

[realtime]
  mlock = "off"

[msg]
  timestamp = "on"

[name]
  guest = "devstack1"
  debug-threads = "on"

char device redirected to /dev/pts/61 (label charserial0)
2016-08-01T11:10:09.392196Z qemu-system-x86_64: -netdev tap,fd=27,id=hostnet0,vhost=on,vhostfd=29: TUNGETIFF ioctl() failed: Bad file descriptor
TUNSETOFFLOAD ioctl() failed: Bad file descriptor
2016-08-01T11:10:09.392304Z qemu-system-x86_64: -netdev tap,fd=27,id=hostnet0,vhost=on,vhostfd=29: vhost-net requested but could not be initialized


#---------------------------------------------------------------------
# NOTE: I invoked the same command-line (with the addition of "-S
# -writeconfig /dev/stdout") that libvirt generated, _while_
# the guest is running, hence the error above.
$ /usr/bin/qemu-system-x86_64 -machine accel=kvm -name guest=devstack1,debug-threads=on -S -object secret,id=masterKey0,format=raw,file=/var/lib/libvirt/qemu/domain-4-devstack1/master-key.aes -machine pc-i440fx-2.6,accel=kvm,usb=off -cpu Haswell-noTSX -m 6144 -realtime mlock=off -smp 1,sockets=1,cores=1,threads=1 -uuid 4aa4e1ca-566b-4d60-ae7f-01fb91b61e25 -nographic -no-user-config -nodefaults -chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/domain-4-devstack1/monitor.sock,server,nowait -mon chardev=charmonitor,id=monitor,mode=control -rtc base=utc,driftfix=slew -global kvm-pit.lost_tick_policy=discard -no-hpet -no-shutdown -global PIIX4_PM.disable_s3=1 -global PIIX4_PM.disable_s4=1 -boot strict=on -device ich9-usb-ehci1,id=usb,bus=pci.0,addr=0x4.0x7 -device ich9-usb-uhci1,masterbus=usb.0,firstport=0,bus=pci.0,multifunction=on,addr=0x4 -device ich9-usb-uhci2,masterbus=usb.0,firstport=2,bus=pci.0,addr=0x4.0x1 -device ich9-usb-uhci3,masterbus=usb.0,firstport=4,bus=pci.0,addr=0x4.0x2 -device virtio-serial-pci,id=virtio-serial0,bus=pci.0,addr=0x3 -drive file=/export/devstack1.qcow2,format=qcow2,if=none,id=drive-virtio-disk0 -device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x5,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1 -netdev tap,fd=27,id=hostnet0,vhost=on,vhostfd=29 -device virtio-net-pci,netdev=hostnet0,id=net0,mac=52:54:00:28:61:ae,bus=pci.0,addr=0x2 -chardev pty,id=charserial0 -device isa-serial,chardev=charserial0,id=serial0 -chardev socket,id=charchannel0,path=/var/lib/libvirt/qemu/channel/target/domain-4-devstack1/org.qemu.guest_agent.0,server,nowait -device virtserialport,bus=virtio-serial0.0,nr=1,chardev=charchannel0,id=channel0,name=org.qemu.guest_agent.0 -device usb-tablet,id=input0 -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x6 -msg timestamp=on -S -writeconfig /dev/stdout |& tee stdout-libvirt-qemu-config.txt
#---------------------------------------------------------------------