From: Gerd Hoffmann <kraxel@redhat.com>
To: John Snow <jsnow@redhat.com>
Cc: "Kevin Wolf" <kwolf@redhat.com>,
"Peter Maydell" <peter.maydell@linaro.org>,
"Daniel P. Berrangé" <berrange@redhat.com>,
"Denis V. Lunev" <den@virtuozzo.com>,
"Cleber Rosa" <cleber@redhat.com>,
"Stefan Hajnoczi" <stefanha@gmail.com>,
"Markus Armbruster" <armbru@redhat.com>,
"Eduardo Habkost" <ehabkost@redhat.com>,
qemu-devel <qemu-devel@nongnu.org>,
"Paolo Bonzini" <pbonzini@redhat.com>,
"Marc-André Lureau" <marcandre.lureau@redhat.com>,
"Dominik Csapak" <d.csapak@proxmox.com>
Subject: Re: Making QEMU easier for management tools and applications
Date: Mon, 27 Jan 2020 09:35:13 +0100 [thread overview]
Message-ID: <20200127083513.hgl5ydgpn4mkuho5@sirius.home.kraxel.org> (raw)
In-Reply-To: <f24ff946-2c37-d7c7-ff18-d67e22aa438e@redhat.com>
Hi,
> We build a "configuration" struct in QAPI, and extend from there.
>
> (2) We offer "--config myconfig.yaml" as an option for specifying
> options.
Yes.
> This precludes the use of *any* traditional command line flags.
Hmm. Given that the transition effort will probably take a while
I think it makes sense to allow mixing config file and cmd line
switches, if it is only for testing the config file parsing and
processing. Maybe have a (temporary) -x-config for that?
We already have qapi schema for -blockdev + -display + -audiodev +
-chardev, creating a configuration struct which supports these
shouldn't be that much effort. Then move over QemuOpts one by one.
The most tricky part here probably is -device support.
> (4) Just scrap the existing config file system entirely. It was never
> finished and does not help solve the existing problem that we do not
> have a schema for our configuration syntax.
Yep. Zero reason to keep that once everything transitioned to qapi.
> - We WOULD need a new YAML parsing layer in QEMU, generated by QAPI.
> Supporting two deserialization layers could lead to strange
> discrepancies between the two formats at runtime. So, admittedly, using
> JSON would be *even easier*, as we could re-use the same parsers already
> battle-tested in QEMU. We could get *MAXIMUM* code re-use this way.
Well, we can support multiple formats, much like openshift accepts both
json and yaml. json is pretty much there already, so we could start
with that and add yaml later on. Possibly even the ini-style syntax
accepted by -readconfig today, although I'm not sure there is much
benefit in that.
> - We will break compatibility with our existing CLI. People will not be
> happy about this, especially, perhaps, embedded board and TCG developers
> who use fairly minimal command lines regularly.
Once config file support is complete enough we should be able to offload
backward compatibility command line parsing to some script which
transforms the cli into a config file. Which is probably better than
trying to add -writeconfig to qemu as we don't have to do the string
processing in C then.
cheers,
Gerd
next prev parent reply other threads:[~2020-01-27 8:36 UTC|newest]
Thread overview: 183+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-20 16:13 Making QEMU easier for management tools and applications Stefan Hajnoczi
2019-12-20 21:07 ` Richard W.M. Jones
2020-01-02 11:26 ` Stefan Hajnoczi
2019-12-21 9:02 ` Markus Armbruster
2019-12-23 15:04 ` Michal Prívozník
2020-01-07 9:36 ` Kevin Wolf
2020-01-07 10:55 ` Michal Privoznik
2020-01-07 12:57 ` Kevin Wolf
2020-01-07 17:53 ` Christophe de Dinechin
2019-12-24 13:41 ` Daniel P. Berrangé
2020-01-22 22:28 ` John Snow
2020-01-23 7:19 ` Markus Armbruster
2020-01-23 17:58 ` John Snow
2020-01-23 19:01 ` Daniel P. Berrangé
2020-01-23 21:07 ` John Snow
2020-01-24 7:59 ` Markus Armbruster
2020-01-24 10:27 ` Daniel P. Berrangé
2020-01-24 14:38 ` Kevin Wolf
2020-01-24 18:23 ` John Snow
2020-01-24 18:30 ` Dr. David Alan Gilbert
2020-01-24 18:48 ` John Snow
2020-01-24 18:52 ` Dr. David Alan Gilbert
2020-01-24 18:58 ` John Snow
2020-01-25 10:18 ` Markus Armbruster
2020-01-27 10:18 ` Daniel P. Berrangé
2020-01-27 12:48 ` Markus Armbruster
2020-01-27 11:56 ` Kevin Wolf
2020-01-27 12:04 ` Peter Maydell
2020-01-27 20:11 ` John Snow
2020-01-27 22:38 ` Paolo Bonzini
2020-01-28 0:37 ` John Snow
2020-01-28 10:16 ` Daniel P. Berrangé
2020-01-28 10:39 ` Kevin Wolf
2020-01-28 15:36 ` Markus Armbruster
2020-01-31 12:25 ` Eric Blake
2020-01-28 10:28 ` Kevin Wolf
2020-01-28 12:36 ` Markus Armbruster
2020-01-28 12:54 ` Kevin Wolf
2020-01-28 13:45 ` Gerd Hoffmann
2020-01-31 6:50 ` Markus Armbruster
2020-01-31 7:48 ` Paolo Bonzini
2020-01-31 8:09 ` Markus Armbruster
2020-02-03 20:07 ` Andrea Bolognani
2020-02-04 9:58 ` Markus Armbruster
2020-01-31 12:27 ` Eric Blake
2020-02-02 9:21 ` Kevin Wolf
2020-02-02 10:44 ` Paolo Bonzini
2020-02-03 6:20 ` Markus Armbruster
2020-02-03 8:48 ` Markus Armbruster
2020-01-27 20:12 ` Dr. David Alan Gilbert
2020-01-24 20:34 ` John Snow
2020-01-27 8:35 ` Gerd Hoffmann [this message]
2020-01-27 12:13 ` Kevin Wolf
2020-01-27 16:18 ` Gerd Hoffmann
2020-01-24 9:50 ` Daniel P. Berrangé
2020-01-25 11:52 ` Paolo Bonzini
2020-01-27 10:05 ` Daniel P. Berrangé
2020-01-27 8:25 ` Tooling to help humans use JSON (was: Making QEMU easier for management tools and applications) Markus Armbruster
2020-01-27 9:06 ` Making QEMU easier for management tools and applications Markus Armbruster
2020-01-27 10:00 ` Daniel P. Berrangé
2020-01-27 14:35 ` Kevin Wolf
2020-01-27 20:29 ` Dr. David Alan Gilbert
2020-01-28 10:59 ` Kevin Wolf
2020-02-05 13:09 ` Kevin Wolf
2020-02-05 19:09 ` qmp-shell for GSoC/Outreachy? (Was: Re: Making QEMU easier for management tools and applications) John Snow
2020-02-05 19:49 ` Dr. David Alan Gilbert
2020-02-06 9:40 ` qmp-shell for GSoC/Outreachy? Markus Armbruster
2020-02-06 10:09 ` Daniel P. Berrangé
2020-02-06 12:11 ` Markus Armbruster
2020-02-06 12:15 ` Daniel P. Berrangé
2020-02-06 18:02 ` Dr. David Alan Gilbert
2020-02-07 21:03 ` John Snow
2020-02-08 7:17 ` Markus Armbruster
2020-02-06 14:21 ` Kevin Wolf
2020-02-06 18:26 ` Dr. David Alan Gilbert
2020-02-07 10:49 ` Kevin Wolf
2020-02-07 21:23 ` John Snow
2020-02-08 7:25 ` Markus Armbruster
2020-02-10 11:59 ` Kevin Wolf
2020-02-10 12:26 ` Kevin Wolf
2020-02-06 18:18 ` Dr. David Alan Gilbert
2020-02-07 7:47 ` Markus Armbruster
2020-02-07 21:31 ` Eric Blake
2020-02-08 7:34 ` Markus Armbruster
2020-02-07 21:56 ` John Snow
2020-02-07 20:56 ` John Snow
2020-01-27 20:59 ` Making QEMU easier for management tools and applications John Snow
2020-01-28 10:16 ` Markus Armbruster
2020-01-28 19:21 ` John Snow
2020-01-24 6:38 ` Markus Armbruster
2020-01-25 22:34 ` Christophe de Dinechin
2020-01-25 11:55 ` Paolo Bonzini
2020-01-02 14:47 ` Stefan Hajnoczi
2020-01-16 11:03 ` Kashyap Chamarthy
2020-01-20 9:55 ` Stefan Hajnoczi
2020-01-20 13:57 ` Kashyap Chamarthy
2020-01-25 11:41 ` Paolo Bonzini
2020-01-27 19:41 ` John Snow
2020-01-02 15:05 ` Dr. David Alan Gilbert
2020-01-13 13:44 ` Markus Armbruster
2019-12-24 13:00 ` Daniel P. Berrangé
2020-01-02 14:22 ` Stefan Hajnoczi
2020-01-22 22:42 ` John Snow
2020-01-23 7:21 ` Markus Armbruster
2020-01-23 10:27 ` Daniel P. Berrangé
2020-01-23 18:13 ` John Snow
2020-01-23 19:12 ` Daniel P. Berrangé
2020-01-02 15:10 ` Dr. David Alan Gilbert
2020-01-07 17:11 ` Christophe de Dinechin
2020-01-08 10:43 ` Kevin Wolf
2020-01-08 11:40 ` Christophe de Dinechin
2020-01-08 13:38 ` Kevin Wolf
2020-01-14 13:04 ` Markus Armbruster
2020-01-14 17:31 ` Christophe de Dinechin
2020-01-15 9:20 ` Markus Armbruster
2020-01-15 9:34 ` Christophe de Dinechin
2020-01-15 12:15 ` Markus Armbruster
2020-01-15 12:19 ` Daniel P. Berrangé
2020-01-15 14:02 ` Markus Armbruster
2020-01-30 21:09 ` Improving QOM documentation [Was: Re: Making QEMU easier for management tools and applications] Kashyap Chamarthy
2020-01-31 6:11 ` Markus Armbruster
2020-01-31 7:46 ` Paolo Bonzini
2020-01-31 15:37 ` Christophe de Dinechin
2020-01-31 16:28 ` Paolo Bonzini
2020-01-31 9:50 ` Kashyap Chamarthy
2020-01-31 10:35 ` Peter Maydell
2020-01-31 11:02 ` Paolo Bonzini
2020-01-31 15:22 ` Kashyap Chamarthy
2020-01-31 17:23 ` Markus Armbruster
2020-02-03 8:56 ` Paolo Bonzini
2020-02-03 9:54 ` Markus Armbruster
2020-02-03 15:21 ` Paolo Bonzini
2020-02-04 8:42 ` Markus Armbruster
2020-01-31 16:39 ` Markus Armbruster
2020-01-20 10:08 ` Making QEMU easier for management tools and applications Stefan Hajnoczi
2020-01-21 5:42 ` Markus Armbruster
2020-01-21 11:32 ` Stefan Hajnoczi
2020-01-21 12:03 ` Marc-André Lureau
2020-01-21 13:36 ` Integrating QOM into QAPI (was: Making QEMU easier for management tools and applications) Markus Armbruster
2020-01-21 14:36 ` Daniel P. Berrangé
2020-01-21 15:01 ` Integrating QOM into QAPI Markus Armbruster
2020-01-21 15:11 ` Marc-André Lureau
2020-01-21 16:21 ` Peter Maydell
2020-01-22 5:16 ` Getting whole-tree patches reviewed and merged (was: Integrating QOM into QAPI) Markus Armbruster
2020-02-07 21:53 ` Getting whole-tree patches reviewed and merged Eric Blake
2020-02-10 11:26 ` Paolo Bonzini
2020-02-10 16:04 ` Markus Armbruster
2020-02-10 16:12 ` Peter Maydell
2020-01-22 10:50 ` Integrating QOM into QAPI Alex Bennée
2020-01-22 12:24 ` Markus Armbruster
2020-01-22 12:42 ` Marc-André Lureau
2020-01-22 13:28 ` Peter Maydell
2020-01-22 13:32 ` Marc-André Lureau
2020-01-23 7:37 ` Markus Armbruster
2020-01-24 18:32 ` Paolo Bonzini
2020-01-25 4:44 ` Marc-André Lureau
2020-01-25 9:28 ` Paolo Bonzini
2020-01-25 21:25 ` Peter Maydell
2020-01-26 8:09 ` Christophe de Dinechin
2020-01-26 9:11 ` Marc-André Lureau
2020-01-26 16:47 ` Paolo Bonzini
2020-01-27 19:05 ` Christophe de Dinechin
2020-01-27 19:05 ` Christophe de Dinechin
2020-01-26 15:04 ` Peter Maydell
2020-01-27 19:05 ` Christophe de Dinechin
2020-01-28 8:00 ` Markus Armbruster
2020-01-28 10:03 ` Daniel P. Berrangé
2020-01-29 12:42 ` Christophe de Dinechin
2020-01-15 9:35 ` Making QEMU easier for management tools and applications Marc-André Lureau
2020-01-15 12:25 ` Markus Armbruster
2020-01-25 17:18 ` Paolo Bonzini
2020-01-27 9:30 ` Markus Armbruster
2020-01-13 16:30 ` Stefan Hajnoczi
2020-02-04 15:54 ` Summary of " Markus Armbruster
2020-02-05 6:38 ` Markus Armbruster
2020-02-10 10:56 ` Stefan Hajnoczi
2020-02-10 11:01 ` Peter Maydell
2020-02-10 11:08 ` Daniel P. Berrangé
2020-02-10 11:29 ` Peter Maydell
2020-02-10 11:04 ` Paolo Bonzini
2020-02-10 16:43 ` Markus Armbruster
2020-02-12 13:54 ` Stefan Hajnoczi
2020-02-12 14:03 ` Daniel P. Berrangé
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