Re: [PATCH 5/5] qemu-options: Remove the deprecated -singlestep option

[Peter Maydell <peter.maydell@linaro.org>]

On Mon, 15 Jan 2024 at 13:54, Thomas Huth <thuth@redhat.com> wrote:
>
> On 12/01/2024 16.39, Philippe Mathieu-Daudé wrote:
> > Hi Thomas
> >
> > +Laurent & Peter
> >
> > On 12/1/24 11:00, Thomas Huth wrote:
> >> It's been marked as deprecated since QEMU 8.1, so it should be fine
> >> to remove this now.
> >>
> >> Signed-off-by: Thomas Huth <thuth@redhat.com>

> > StatusInfo::singlestep was deprecated at the same time,
> > can we remove it?
> >
> > IOW could we complete your patch with this?

> > diff --git a/qapi/run-state.json b/qapi/run-state.json
> > index ca05502e0a..08bc99cb85 100644
> > --- a/qapi/run-state.json
> > +++ b/qapi/run-state.json
> > @@ -106,25 +106,15 @@
> >   #
> >   # @running: true if all VCPUs are runnable, false if not runnable
> >   #
> > -# @singlestep: true if using TCG with one guest instruction per
> > -#     translation block
> > -#
> >   # @status: the virtual machine @RunState
> >   #
> >   # Features:
> >   #
> > -# @deprecated: Member 'singlestep' is deprecated (with no
> > -#     replacement).
> > -#
> >   # Since: 0.14
> >   #
> > -# Notes: @singlestep is enabled on the command line with '-accel
> > -#     tcg,one-insn-per-tb=on', or with the HMP 'one-insn-per-tb'
> > -#     command.
> >   ##
> >   { 'struct': 'StatusInfo',
> >     'data': {'running': 'bool',
> > -           'singlestep': { 'type': 'bool', 'features': [ 'deprecated' ]},
> >              'status': 'RunState'} }
>
> Uh, oh, that's a bigger change already ... can we safely remove the field
> here without upsetting 3rd party apps that rely on this interface?

That was the whole point of marking it 'deprecated' in the JSON,
I thought? We don't think anybody's using it, we've given fair
warning, isn't the next step "remove it"? Markus, you're the
expert on QAPI deprecations...

-- PMM