What follows is a list of all features currently marked as
deprecated.
-@section Build options
-
-@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 -machine enforce-config-section=on|off (since 3.1)
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-Option @option{-virtioconsole} has been replaced by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-The @option{-enable-hax} option has been replaced by @option{-accel hax}.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
topologies described with -smp include all possible cpus, i.e.
@math{@var{sockets} * @var{cores} * @var{threads} = @var{maxcpus}}.
+@subsection -vnc acl (since 4.0.0)
+
+The @code{acl} option to the @code{-vnc} argument has been replaced
+by the @code{tls-authz} and @code{sasl-authz} options.
+
+@subsection QEMU_AUDIO_ environment variables and -audio-help (since 4.0)
+
+The ``-audiodev'' argument is now the preferred way to specify audio
+backend settings instead of environment variables. To ease migration to
+the new format, the ``-audiodev-help'' option can be used to convert
+the current values of the environment variables to ``-audiodev'' options.
+
@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-block result field dirty-bitmaps[i].status (since 4.0)
+
+The ``status'' field of the ``BlockDirtyInfo'' structure, returned by
+the query-block command is deprecated. Two new boolean fields,
+``recording'' and ``busy'' effectively replace it.
+
@subsection query-cpus (since 2.12.0)
The ``query-cpus'' command is replaced by the ``query-cpus-fast'' command.
The ``arch'' output member of the ``query-cpus-fast'' command is
replaced by the ``target'' output member.
-@section System emulator human monitor commands
+@subsection cpu-add (since 4.0)
+
+Use ``device_add'' for hotplugging vCPUs instead of ``cpu-add''. See
+documentation of ``query-hotpluggable-cpus'' for additional
+details.
+
+@subsection query-events (since 4.0)
+
+The ``query-events'' command has been superseded by the more powerful
+and accurate ``query-qmp-schema'' command.
+
+@section Human Monitor Protocol (HMP) commands
@subsection The hub_id parameter of 'hostfwd_add' / 'hostfwd_remove' (since 3.1)
The @option{[hub_id name]} parameter tuple of the 'hostfwd_add' and
'hostfwd_remove' HMP commands has been replaced by @option{netdev_id}.
-@section System emulator devices
+@subsection cpu-add (since 4.0)
+
+Use ``device_add'' for hotplugging vCPUs instead of ``cpu-add''. See
+documentation of ``query-hotpluggable-cpus'' for additional details.
-@subsection ivshmem (since 2.6.0)
+@subsection acl_show, acl_reset, acl_policy, acl_add, acl_remove (since 4.0.0)
-The ``ivshmem'' device type is replaced by either the ``ivshmem-plain''
-or ``ivshmem-doorbell`` device types.
+The ``acl_show'', ``acl_reset'', ``acl_policy'', ``acl_add'', and
+``acl_remove'' commands are deprecated with no replacement. Authorization
+for VNC should be performed using the pluggable QAuthZ objects.
+
+@section System emulator devices
@subsection bluetooth (since 3.1)
@section System emulator machines
-@subsection pc-0.10 and pc-0.11 (since 3.0)
+@subsection pc-0.12, pc-0.13, pc-0.14 and pc-0.15 (since 4.0)
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.
@code{json:@{"file.driver":"rbd", "file.pool":"rbd", "file.image":"name"@}}
-@subsection vio-spapr-device device options
+@section Related binaries
+
+@subsection qemu-nbd --partition (since 4.0.0)
+
+The ``qemu-nbd --partition $digit'' code (also spelled @option{-P})
+can only handle MBR partitions, and has never correctly handled
+logical partitions beyond partition 5. If you know the offset and
+length of the partition (perhaps by using @code{sfdisk} within the
+guest), you can achieve the effect of exporting just that subset of
+the disk by use of the @option{--image-opts} option with a raw
+blockdev using the @code{offset} and @code{size} parameters layered on
+top of any other existing blockdev. For example, if partition 1 is
+100MiB long starting at 1MiB, the old command:
+
+@code{qemu-nbd -t -P 1 -f qcow2 file.qcow2}
+
+can be rewritten as:
+
+@code{qemu-nbd -t --image-opts driver=raw,offset=1M,size=100M,file.driver=qcow2,file.backing.driver=file,file.backing.filename=file.qcow2}
+
+Alternatively, the @code{nbdkit} project provides a more powerful
+partition filter on top of its nbd plugin, which can be used to select
+an arbitrary MBR or GPT partition on top of any other full-image NBD
+export. Using this to rewrite the above example results in:
-@subsubsection "irq": "" (since 3.0.0)
+@code{qemu-nbd -t -k /tmp/sock -f qcow2 file.qcow2 &}
+@code{nbdkit -f --filter=partition nbd socket=/tmp/sock partition=1}
-The ``irq'' property is obsoleted.
+Note that if you are exposing the export via /dev/nbd0, it is easier
+to just export the entire image and then mount only /dev/nbd0p1 than
+it is to reinvoke @command{qemu-nbd -c /dev/nbd0} limited to just a
+subset of the image.
projects / mirror_qemu.git / blobdiff