[Qemu-devel] q35 : virtio-serial on pci bridge : bus not found

[Alexandre DERUMIER <aderumier@odiso.com>]

Hi, I can't use virtio-serial, with q35 machine, on a pci bridge (other devices works fine).


Is it a known bug ?


error message:
---------------
kvm: -device virtio-serial,id=spice,bus=pci.0,addr=0x9: Bus 'pci.0' not found


architecture is:

pcie.0
   --->pcidmi (i82801b11-bridge)
         ------->pci.0 (pci-bridge)



/usr/bin/kvm -id 600 -chardev socket,id=qmp,path=/var/run/qemu-server/600.qmp,server,nowait 
-mon chardev=qmp,mode=control -vnc unix:/var/run/qemu-server/600.vnc,x509,password
-pidfile /var/run/qemu-server/600.pid -daemonize -name tankrechner -smp sockets=1,cores=1 
-nodefaults -boot menu=on -vga qxl -cpu kvm64,+lahf_lm,+x2apic,+sep
-spice tls-port=61002,addr=127.0.0.1,tls-ciphers=DES-CBC3-SHA,seamless-migration=on
-device virtio-serial,id=spice,bus=pci.0,addr=0x9 
-chardev spicevmc,id=vdagent,name=vdagent 
-device virtserialport,chardev=vdagent,name=com.redhat.spice.0 
-m 1024 
-readconfig /usr/share/qemu-server/pve-q35.cfg
-device piix3-usb-uhci,id=uhci,bus=pci.0,addr=0x1.0x2 
-device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x3 
-drive if=none,id=drive-ide2,media=cdrom,aio=native 
-device ide-cd,bus=ide.1,unit=0,drive=drive-ide2,id=ide2,bootindex=200 
-drive file=/mnt/vmfs-hdd-r5_3x698/images/600/vm-600-disk-1.raw,if=none,id=drive-virtio0,format=raw,aio=native,cache=none
-device virtio-blk-pci,drive=drive-virtio0,id=virtio0,bus=pci.0,addr=0xa,bootindex=100
-netdev type=tap,id=net0,ifname=tap600i0,script=/var/lib/qemu-server/pve-bridge,vhost=on
-device virtio-net-pci,mac=EA:07:3A:31:12:7F,netdev=net0,bus=pci.0,addr=0x12,id=net0,bootindex=300
-rtc driftfix=slew,base=localtime 
-machine type=q35


with pve-q35.cfg

[device "ehci"]
  driver = "ich9-usb-ehci1"
  multifunction = "on"
  bus = "pcie.0"
  addr = "1d.7"

[device "uhci-1"]
  driver = "ich9-usb-uhci1"
  multifunction = "on"
  bus = "pcie.0"
  addr = "1d.0"
  masterbus = "ehci.0"
  firstport = "0"

[device "uhci-2"]
  driver = "ich9-usb-uhci2"
  multifunction = "on"
  bus = "pcie.0"
  addr = "1d.1"
  masterbus = "ehci.0"
  firstport = "2"

[device "uhci-3"]
  driver = "ich9-usb-uhci3"
  multifunction = "on"
  bus = "pcie.0"
  addr = "1d.2"
  masterbus = "ehci.0"
  firstport = "4"

[device "ehci-2"]
  driver = "ich9-usb-ehci2"
  multifunction = "on"
  bus = "pcie.0"
  addr = "1a.7"

[device "uhci-4"]
  driver = "ich9-usb-uhci4"
  multifunction = "on"
  bus = "pcie.0"
  addr = "1a.0"
  masterbus = "ehci-2.0"
  firstport = "0"

[device "uhci-5"]
  driver = "ich9-usb-uhci5"
  multifunction = "on"
  bus = "pcie.0"
  addr = "1a.1"
  masterbus = "ehci-2.0"
  firstport = "2"

[device "uhci-6"]
  driver = "ich9-usb-uhci6"
  multifunction = "on"
  bus = "pcie.0"
  addr = "1a.2"
  masterbus = "ehci-2.0"
  firstport = "4"

[device "audio0"]
  driver = "ich9-intel-hda"
  bus = "pcie.0"
  addr = "1b.0"


[device "ich9-pcie-port-1"]
  driver = "ioh3420"
  multifunction = "on"
  bus = "pcie.0"
  addr = "1c.0"
  port = "1"
  chassis = "1"

[device "ich9-pcie-port-2"]
  driver = "ioh3420"
  multifunction = "on"
  bus = "pcie.0"
  addr = "1c.1"
  port = "2"
  chassis = "2"

[device "ich9-pcie-port-3"]
  driver = "ioh3420"
  multifunction = "on"
  bus = "pcie.0"
  addr = "1c.2"
  port = "3"
  chassis = "3"

[device "ich9-pcie-port-4"]
  driver = "ioh3420"
  multifunction = "on"
  bus = "pcie.0"
  addr = "1c.3"
  port = "4"
  chassis = "4"
[device "pcidmi"}
  driver = "i82801b11-bridge"
  bus = "pcie.0"
  addr = "1e.0"

[device "pci.0"]
  driver = "pci-bridge"
  bus = "pcidmi"
  addr = "1.0"
  chassis_nr = "1"

[device "pci.1"]
  driver = "pci-bridge"
  bus = "pcidmi"
  addr = "2.0"
  chassis_nr = "2"

[device "pci.2"]
  driver = "pci-bridge"
  bus = "pcidmi"
  addr = "3.0"
  chassis_nr = "3"