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Re: [Qemu-devel] [PATCH v3 5/7] hmp: Add info commands for preconfig
From: |
Dr. David Alan Gilbert |
Subject: |
Re: [Qemu-devel] [PATCH v3 5/7] hmp: Add info commands for preconfig |
Date: |
Mon, 11 Jun 2018 18:49:58 +0100 |
User-agent: |
Mutt/1.10.0 (2018-05-17) |
* Markus Armbruster (address@hidden) wrote:
> "Dr. David Alan Gilbert (git)" <address@hidden> writes:
>
> > From: "Dr. David Alan Gilbert" <address@hidden>
> >
> > Allow a bunch of the info commands to be used in preconfig.
> >
> > version, chardev, name, uuid,memdev, iothreads
> > Were enabled in QMP in the previous patch from Igor
>
> Yes, these are okay together with PATCH 4.
>
> > status, hotpluggable_cpus
> > Was enabled in the original allow-preconfig series
>
> query-status looks okay to me.
>
> > history
> > is HMP specific
>
> Yes.
>
> > usbhost, qom-tree, numa
> > Don't have a QMP equivalent
>
> HMP commands without a QMP equivalent are okay if their functionality
> makes no sense in QMP, or is of use only for human users.
>
> Example for "makes no sense in QMP": setting the current CPU, because a
> QMP monitor doesn't have a current CPU.
>
> Examples for "is of use only for human users": HMP command "help", the
> integrated pocket calculator.
Right, but they do already exist; it's possible we may want to fix/add
QMP versions - but this series isn't about going through and fixing
existing stuff up.
> Now let's review the three commands:
>
> * Gerd, why does "info usbhost" have no QMP equivalent?
>
> * Eduardo, why does "info numa" have no QMP equivalent?
>
> * "info qom-tree" is a recursive variant of qom-list that skips anything
> but children. This convenience command exists so you don't have to
> filter and string together output from many qom-list.
>
> I think it stands to reason that if providing "info qom-tree" makes
> sense, then so does qom-list (HMP and QMP). If qom-list, then
> qom-list-types, qom-list-properties, qom-get, and probably even
> qom-set (I've always been suspicious of qom-set, but that has nothing
> to do with preconfig state).
>
> It might make sense to split off the whole QOM shebang into a separate
> patch.
People have been trying to add qom-get etc for quite a while (I tried a
couple of years ago); it gets stuck in type display issues. I've not
directly seen a need for those other variants, but qom-get is something
I'd love to have, still that's a job for another patch.
'info qom-tree' is very very useful when debugging qemu to see what the
basic state we're building is; it's primarily for debugging.
Dave
> > Signed-off-by: Dr. David Alan Gilbert <address@hidden>
--
Dr. David Alan Gilbert / address@hidden / Manchester, UK
- [Qemu-devel] [PATCH v3 0/7] Reenable hmp for preconfig mode, Dr. David Alan Gilbert (git), 2018/06/08
- [Qemu-devel] [PATCH v3 5/7] hmp: Add info commands for preconfig, Dr. David Alan Gilbert (git), 2018/06/08
- Re: [Qemu-devel] [PATCH v3 5/7] hmp: Add info commands for preconfig, Markus Armbruster, 2018/06/11
- Re: [Qemu-devel] [PATCH v3 5/7] hmp: Add info commands for preconfig,
Dr. David Alan Gilbert <=
- Re: [Qemu-devel] [PATCH v3 5/7] hmp: Add info commands for preconfig, Gerd Hoffmann, 2018/06/12
- Re: [Qemu-devel] [PATCH v3 5/7] hmp: Add info commands for preconfig, Markus Armbruster, 2018/06/12
- Re: [Qemu-devel] [PATCH v3 5/7] hmp: Add info commands for preconfig, Dr. David Alan Gilbert, 2018/06/12
- [Qemu-devel] Abandon our QMP first policy? (was: [PATCH v3 5/7] hmp: Add info commands for preconfig), Markus Armbruster, 2018/06/15
- Re: [Qemu-devel] Abandon our QMP first policy? (was: [PATCH v3 5/7] hmp: Add info commands for preconfig), Dr. David Alan Gilbert, 2018/06/15
- Re: [Qemu-devel] Abandon our QMP first policy? (was: [PATCH v3 5/7] hmp: Add info commands for preconfig), Eduardo Habkost, 2018/06/15
- Re: [Qemu-devel] Abandon our QMP first policy? (was: [PATCH v3 5/7] hmp: Add info commands for preconfig), Gerd Hoffmann, 2018/06/18
- Re: [Qemu-devel] Abandon our QMP first policy? (was: [PATCH v3 5/7] hmp: Add info commands for preconfig), Dr. David Alan Gilbert, 2018/06/20
- Re: [Qemu-devel] [PATCH v3 5/7] hmp: Add info commands for preconfig, Markus Armbruster, 2018/06/12
- Re: [Qemu-devel] [PATCH v3 5/7] hmp: Add info commands for preconfig, Dr. David Alan Gilbert, 2018/06/12