LXD developers have reported that [object] stanzas have stopped
working in configuration files.
The problem is that QEMU 6.0 switched the creation of objects from
qemu_opts_foreach to a bespoke QTAILQ, in preparation for supporting
JSON syntax in -object. Entries from the configuration file however
do not go through object_option_parse, and are thus lost. Of the many
fixes that are possible, I chose one that is slightly more invasive but
more consistent with the plans for keyval-ification of options such as
-M and -accel.
-set was also broken by the same change, but for simplicity I chose
not to add it back yet. However, this series will report the
breakage instead of failing silently.
The first two patches of this series are thus a reduced version of
20210513162901.1310239-1-pbonzini@redhat.com/">https://patchew.org/QEMU/20210513162901.1310239-1-pbonzini@redhat.com/
([PATCH 00/14] vl: compound properties for machines and accelerators),
with the -set infrastructure removed. The third is very simple and
uses the newly-provided hooks to parse objects from configuration files.