qemu-deprecated.texi - qemu - Git at Google

 @node Deprecated features
 @appendix Deprecated features

 In general features are intended to be supported indefinitely once
 introduced into QEMU. In the event that a feature needs to be removed,
 it will be listed in this appendix. The feature will remain functional
 for 2 releases prior to actual removal. Deprecated features may also
 generate warnings on the console when QEMU starts up, or if activated
 via a monitor command, however, this is not a mandatory requirement.

 Prior to the 2.10.0 release there was no official policy on how
 long features would be deprecated prior to their removal, nor
 any documented list of which features were deprecated. Thus
 any features deprecated prior to 2.10.0 will be treated as if
 they were first deprecated in the 2.10.0 release.

 What follows is a list of all features currently marked as
 deprecated.

 @section Build options

 @subsection GTK 2.x

 Previously QEMU has supported building against both GTK 2.x
 and 3.x series APIs. Support for the GTK 2.x builds will be
 discontinued, so maintainers should switch to using GTK 3.x,
 which is the default.

 @subsection SDL 1.2

 Previously QEMU has supported building against both SDL 1.2
 and 2.0 series APIs. Support for the SDL 1.2 builds will be
 discontinued, so maintainers should switch to using SDL 2.0,
 which is the default.

 @section System emulator command line arguments

 @subsection -no-kvm (since 1.3.0)

 The ``-no-kvm'' argument is now a synonym for setting
 ``-machine accel=tcg''.

 @subsection -tftp (since 2.6.0)

 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.

 @subsection -bootp (since 2.6.0)

 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.

 @subsection -redir (since 2.6.0)

 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.

 @subsection -smb (since 2.6.0)

 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.

 @subsection -usbdevice (since 2.10.0)

 The ``-usbdevice DEV'' argument is now a synonym for setting
 the ``-device usb-DEV'' argument instead. The deprecated syntax
 would automatically enable USB support on the machine type.
 If using the new syntax, USB support must be explicitly
 enabled via the ``-machine usb=on'' argument.

 @subsection -fsdev handle (since 2.12.0)

 The ``handle'' fsdev backend does not support symlinks and causes the 9p
 filesystem in the guest to fail a fair amount of tests from the PJD POSIX
 filesystem test suite. Also it requires the CAP_DAC_READ_SEARCH capability,
 which is not the recommended way to run QEMU. This backend should not be
 used and it will be removed with no replacement.

 @subsection -no-frame (since 2.12.0)

 The @code{--no-frame} argument works with SDL 1.2 only. The other user
 interfaces never implemented this in the first place. So this will be
 removed together with SDL 1.2 support.

 @subsection -virtioconsole (since 3.0.0)

 Option @option{-virtioconsole} has been replaced by
 @option{-device virtconsole}.

 @subsection -clock (since 3.0.0)

 The @code{-clock} option is ignored since QEMU version 1.7.0. There is no
 replacement since it is not needed anymore.

 @subsection -enable-hax (since 3.0.0)

 The @option{-enable-hax} option has been replaced by @option{-accel hax}.
 Both options have been introduced in QEMU version 2.9.0.

 @subsection -drive file=json:@{...@{'driver':'file'@}@} (since 3.0)

 The 'file' driver for drives is no longer appropriate for character or host
 devices and will only accept regular files (S_IFREG). The correct driver
 for these file types is 'host_cdrom' or 'host_device' as appropriate.

 @section QEMU Machine Protocol (QMP) commands

 @subsection block-dirty-bitmap-add "autoload" parameter (since 2.12.0)

 "autoload" parameter is now ignored. All bitmaps are automatically loaded
 from qcow2 images.

 @subsection query-cpus (since 2.12.0)

 The ``query-cpus'' command is replaced by the ``query-cpus-fast'' command.

 @subsection query-cpus-fast "arch" output member (since 3.0.0)

 The ``arch'' output member of the ``query-cpus-fast'' command is
 replaced by the ``target'' output member.

 @section System emulator devices

 @subsection ivshmem (since 2.6.0)

 The ``ivshmem'' device type is replaced by either the ``ivshmem-plain''
 or ``ivshmem-doorbell`` device types.

 @subsection Page size support < 4k for embedded PowerPC CPUs (since 2.12.0)

 qemu-system-ppcemb will be removed. qemu-system-ppc (or qemu-system-ppc64)
 should be used instead. That means that embedded 4xx PowerPC CPUs will not
 support page sizes < 4096 any longer.

 @section System emulator machines

 @subsection pc-0.10 and pc-0.11 (since 3.0)

 These machine types are very old and likely can not be used for live migration
 from old QEMU versions anymore. A newer machine type should be used instead.

 @subsection prep (PowerPC) (since 3.1)

 This machine type uses an unmaintained firmware, broken in lots of ways,
 and unable to start post-2004 operating systems. 40p machine type should be
 used instead.

 @section Device options

 @subsection Block device options

 @subsubsection "backing": "" (since 2.12.0)

 In order to prevent QEMU from automatically opening an image's backing
 chain, use ``"backing": null'' instead.

 @subsection vio-spapr-device device options

 @subsubsection "irq": "" (since 3.0.0)

 The ``irq'' property is obsoleted.
	@node Deprecated features
	@appendix Deprecated features

	In general features are intended to be supported indefinitely once
	introduced into QEMU. In the event that a feature needs to be removed,
	it will be listed in this appendix. The feature will remain functional
	for 2 releases prior to actual removal. Deprecated features may also
	generate warnings on the console when QEMU starts up, or if activated
	via a monitor command, however, this is not a mandatory requirement.

	Prior to the 2.10.0 release there was no official policy on how
	long features would be deprecated prior to their removal, nor
	any documented list of which features were deprecated. Thus
	any features deprecated prior to 2.10.0 will be treated as if
	they were first deprecated in the 2.10.0 release.

	What follows is a list of all features currently marked as
	deprecated.

	@section Build options

	@subsection GTK 2.x

	Previously QEMU has supported building against both GTK 2.x
	and 3.x series APIs. Support for the GTK 2.x builds will be
	discontinued, so maintainers should switch to using GTK 3.x,
	which is the default.

	@subsection SDL 1.2

	Previously QEMU has supported building against both SDL 1.2
	and 2.0 series APIs. Support for the SDL 1.2 builds will be
	discontinued, so maintainers should switch to using SDL 2.0,
	which is the default.

	@section System emulator command line arguments

	@subsection -no-kvm (since 1.3.0)

	The ``-no-kvm'' argument is now a synonym for setting
	``-machine accel=tcg''.

	@subsection -tftp (since 2.6.0)

	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.

	@subsection -bootp (since 2.6.0)

	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.

	@subsection -redir (since 2.6.0)

	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.

	@subsection -smb (since 2.6.0)

	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.

	@subsection -usbdevice (since 2.10.0)

	The ``-usbdevice DEV'' argument is now a synonym for setting
	the ``-device usb-DEV'' argument instead. The deprecated syntax
	would automatically enable USB support on the machine type.
	If using the new syntax, USB support must be explicitly
	enabled via the ``-machine usb=on'' argument.

	@subsection -fsdev handle (since 2.12.0)

	The ``handle'' fsdev backend does not support symlinks and causes the 9p
	filesystem in the guest to fail a fair amount of tests from the PJD POSIX
	filesystem test suite. Also it requires the CAP_DAC_READ_SEARCH capability,
	which is not the recommended way to run QEMU. This backend should not be
	used and it will be removed with no replacement.

	@subsection -no-frame (since 2.12.0)

	The @code{--no-frame} argument works with SDL 1.2 only. The other user
	interfaces never implemented this in the first place. So this will be
	removed together with SDL 1.2 support.

	@subsection -virtioconsole (since 3.0.0)

	Option @option{-virtioconsole} has been replaced by
	@option{-device virtconsole}.

	@subsection -clock (since 3.0.0)

	The @code{-clock} option is ignored since QEMU version 1.7.0. There is no
	replacement since it is not needed anymore.

	@subsection -enable-hax (since 3.0.0)

	The @option{-enable-hax} option has been replaced by @option{-accel hax}.
	Both options have been introduced in QEMU version 2.9.0.

	@subsection -drive file=json:@{...@{'driver':'file'@}@} (since 3.0)

	The 'file' driver for drives is no longer appropriate for character or host
	devices and will only accept regular files (S_IFREG). The correct driver
	for these file types is 'host_cdrom' or 'host_device' as appropriate.

	@section QEMU Machine Protocol (QMP) commands

	@subsection block-dirty-bitmap-add "autoload" parameter (since 2.12.0)

	"autoload" parameter is now ignored. All bitmaps are automatically loaded
	from qcow2 images.

	@subsection query-cpus (since 2.12.0)

	The ``query-cpus'' command is replaced by the ``query-cpus-fast'' command.

	@subsection query-cpus-fast "arch" output member (since 3.0.0)

	The ``arch'' output member of the ``query-cpus-fast'' command is
	replaced by the ``target'' output member.

	@section System emulator devices

	@subsection ivshmem (since 2.6.0)

	The ``ivshmem'' device type is replaced by either the ``ivshmem-plain''
	or ``ivshmem-doorbell`` device types.

	@subsection Page size support < 4k for embedded PowerPC CPUs (since 2.12.0)

	qemu-system-ppcemb will be removed. qemu-system-ppc (or qemu-system-ppc64)
	should be used instead. That means that embedded 4xx PowerPC CPUs will not
	support page sizes < 4096 any longer.

	@section System emulator machines

	@subsection pc-0.10 and pc-0.11 (since 3.0)

	These machine types are very old and likely can not be used for live migration
	from old QEMU versions anymore. A newer machine type should be used instead.

	@subsection prep (PowerPC) (since 3.1)

	This machine type uses an unmaintained firmware, broken in lots of ways,
	and unable to start post-2004 operating systems. 40p machine type should be
	used instead.

	@section Device options

	@subsection Block device options

	@subsubsection "backing": "" (since 2.12.0)

	In order to prevent QEMU from automatically opening an image's backing
	chain, use ``"backing": null'' instead.

	@subsection vio-spapr-device device options

	@subsubsection "irq": "" (since 3.0.0)

	The ``irq'' property is obsoleted.