Features/RemovedFeatures

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This page is about features that have been removed from QEMU (after a deprecation period), and what new features should be used instead.

Removed command line parameters

Parameter Deprecated in Removed in Replacement
-balloon v2.12.0 v3.1.0 The -balloon option has been replaced by -device virtio-balloon.
-bootp v2.6.0 v3.1.0 The -bootp /some/file argument is replaced by either -netdev user,id=x,bootp=/some/file (for pluggable NICs, accompanied with -device …,netdev=x), or -nic user,bootp=/some/file (for embedded NICs). The new syntax allows different settings to be provided per NIC.
-drive serial=r
-drive trans=t
-drive secs=s
-drive heads=h
-drive cyls=c
-drive addr=a
v2.10.0 v3.0.0 The drive geometry should now be specified via -device …,drive=dr,cyls=c,heads=h,secs=s,bios-chs-trans=t,addr=a,serial=r (together with -drive if=none,id=dr,…).
-hdachs v2.10.0 v2.12.0 The geometry defined by -hdachs c,h,s,t should now be specified via -device ide-hd,drive=dr,cyls=c,heads=h,secs=s,bios-chs-trans=t (together with -drive if=none,id=dr,…).
-localtime v2.12.0 v3.1.0 Replaced by -rtc base=localtime
-net channel v2.6.0 v2.12.0 Option has been replaced by -net user,guestfwd=…
-net dump v2.10.0 v2.12.0 -net dump[,vlan=n][,file=filename][,len=maxlen] has been replaced by -object filter-dump,id=id,netdev=dev[,file=filename][,maxlen=maxlen]. Note that the new syntax works with netdev IDs instead of the old "vlan" hubs.
-net …,vlan=x v2.9.0 v3.0.0 To connect one NIC frontend with a network backend, either use -nic … (e.g. for on-board NICs) or use -netdev …,id=n together with -device …,netdev=n (for full control over pluggable NICs). To connect multiple NICs or network backends via a hub device (which is what vlan did), use -nic hubport,hubid=x,… or -netdev hubport,id=n,hubid=x,… (together with -device …,netdev=n) instead.
-nodefconfig v2.11.0 v3.1.0 Use -no-user-config instead.
-no-kvm-irqchip v1.3.0 v3.0.0 Use -machine kernel_irqchip=off instead.
-no-kvm-pit v1.3.0 v2.12.0 There is no replacement, since this was just a dummy option that has been ignored.
-no-kvm-pit-reinjection v1.3.0 v3.0.0 Use -global kvm-pit.lost_tick_policy=discard instead.
-redir v2.6.0 v3.1.0 The -redir [tcp|udp]:hostport:[guestaddr]:guestport argument is replaced by either -netdev user,id=x,hostfwd=[tcp|udp]:[hostaddr]:hostport-[guestaddr]:guestport (for pluggable NICs, accompanied with -device …,netdev=x) or -nic user,hostfwd=[tcp|udp]:[hostaddr]:hostport-[guestaddr]:guestport (for embedded NICs). The new syntax allows different settings to be provided per NIC.
-rtc-td-hack v2.12.0 v3.1.0 Use -rtc driftfix=slew instead.
-smb v2.6.0 v3.1.0 The -smb /some/dir argument is replaced by either -netdev user,id=x,smb=/some/dir (for pluggable NICs, accompanied with -device …,netdev=x), or -nic user,smb=/some/dir (for embedded NICs). The new syntax allows different settings to be provided per NIC.
-startdate v2.12.0 v3.1.0 Replaced by -rtc base=date.
-tdf v1.3.0 v2.12.0 There is no replacement, the -tdf option has just been ignored since the behaviour that could be changed by this option in qemu-kvm is now the default when using the KVM PIT. It still can be requested explicitly using -global kvm-pit.lost_tick_policy=discard.
-tftp v2.6.0 v3.1.0 The -tftp /some/dir argument is replaced by either -netdev user,id=x,tftp=/some/dir (for pluggable NICs, accompanied with -device …,netdev=x), or -nic user,tftp=/some/dir (for embedded NICs). The new syntax allows different settings to be provided per NIC.
-vnc …,tls=…
-vnc …,x509=…
-vnc …,x509verify=…
v2.5.0 v3.1.0 The "tls-creds" option should be used instead to point to a "tls-creds-x509" object created using "-object"

Removed HMP commands

Parameter Deprecated in Removed in Replacement
usb_add and usb_remove v2.10.0 v2.12.0 Replaced by device_add and device_del (use device_add help for a list of available devices)
host_net_add and host_net_remove v2.10.0 v2.12.0 Replaced by netdev_add and netdev_del

Removed devices

Device Deprecated in Removed in Replacement
ivshmem v2.6.0 v4.0.0 Replaced by either the ivshmem-plain or ivshmem-doorbell
spapr-pci-vfio-host-bridge v2.6.0 v2.12.0 The spapr-pci-vfio-host-bridge device type has been replaced by the spapr-pci-host-bridge device type.

Removed machine types

Machine Deprecated in Removed in Replacement
dummy (m68k) v2.9.0 v2.9.0 Use the none machine with the loader device instead.
pc-0.10 - pc-0.11 v3.0.0 v4.0.0 Use a newer pc-i440fx-x.y machine type instead.
s390-virtio v2.6.0 v2.6.0 Use the s390-ccw-virtio machine instead.
xlnx-ep108 v2.11.0 v3.0.0 The EP108 was an early access development board that is no longer used. Use the xlnx-zcu102 machine instead.