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qemu-option: warn for short-form boolean options

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Options such as "server" or "nowait", that are commonly found in -chardev,
are sugar for "server=on" and "wait=off".  This is quite surprising and
also does not have any notion of typing attached.  It is even possible to
do "-device e1000,noid" and get a device with "id=off".

Deprecate it and print a warning when it is encountered.  In general,
this short form for boolean options only seems to be in wide use for
-chardev and -spice.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini
2021-01-23 15:55:08 -05:00
parent afd736252f
commit ccd3b3b811
3 changed files with 25 additions and 12 deletions
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docs/system/deprecated.rst
+6
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@@ -127,6 +127,12 @@ Drives with interface types other than ``if=none`` are for onboard
devices. It is possible to use drives the board doesn't pick up with
-device. This usage is now deprecated. Use ``if=none`` instead.
Short-form boolean options (since 6.0)
''''''''''''''''''''''''''''''''''''''
Boolean options such as ``share=on``/``share=off`` could be written
in short form as ``share`` and ``noshare``. This is now deprecated
and will cause a warning.
QEMU Machine Protocol (QMP) commands
------------------------------------