On 11/3/21 09:02, Markus Armbruster wrote:
I wonder whether we really have to step through three states
x-exit-preconfig cont
preconfig ---> pre run ---> run
and not two
cont
pre run ---> run
Devices would be hotplugged between x-exit-preconfig and cont, and part
of the machine until x-exit-preconfig; so there is a need for something
like x-exit-preconfig.
In my prototype of a QMP-only binary, the idea would be that there
wouldn't be a single x-exit-preconfig command, but "cont",
"migrate-incoming", "finish-machine-init" (the stable replacement for
x-exit-preconfig) and "loadvm" would all complete the configuration of
the machine. "finish-machine-init" would do nothing else, the others
would continue with whatever they were supposed to do.
Which of the queries you need work only between x-exit-preconfig and -S?
Well before x-exit-preconfig, QMP only permits a very small number
of commands - QEMU has loosened that up a bit, but I don't think anyone
has checked whether there's enough to cover libvirt's current usage yet.
Indeed I looked at the commands that operate on the backends, but not
that much at query commands.
Paolo
