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Re: [PATCH] ppc: function to setup latest class options
From: |
Michael S. Tsirkin |
Subject: |
Re: [PATCH] ppc: function to setup latest class options |
Date: |
Fri, 7 Feb 2020 09:27:32 -0500 |
On Fri, Feb 07, 2020 at 12:12:09PM +0100, Greg Kurz wrote:
> On Fri, 7 Feb 2020 11:35:47 +0100
> Philippe Mathieu-Daudé <address@hidden> wrote:
>
> > On 2/7/20 7:48 AM, Michael S. Tsirkin wrote:
> > > We are going to add more init for the latest machine, so move the setup
> > > to a function so we don't have to change the DEFINE_SPAPR_MACHINE macro
> > > each time.
> > >
> > > Signed-off-by: Michael S. Tsirkin <address@hidden>
> > > ---
> > > hw/ppc/spapr.c | 9 +++++++--
> > > 1 file changed, 7 insertions(+), 2 deletions(-)
> > >
> > > diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
> > > index 02cf53fc5b..4cf2a992a5 100644
> > > --- a/hw/ppc/spapr.c
> > > +++ b/hw/ppc/spapr.c
> > > @@ -4428,6 +4428,12 @@ static const TypeInfo spapr_machine_info = {
> > > },
> > > };
> > >
> > > +static void spapr_machine_latest_class_options(MachineClass *mc)
> > > +{
> > > + mc->alias = "pseries";
> > > + mc->is_default = 1;
> >
> > But we can have only 1 default per QEMU binary... How PPC manage having
> > multiple defaults? The first or last listed is choosen as default?
> >
>
> IIUC it isn't about putting multiple defaults here. It is about putting
> any additional init for the default machine type that we cannot put in
> spapr_machine_class_init(), instead of putting it in the versioned
> init function, eg. spapr_machine_5_0_class_options(). Otherwise this
> would force us to carry the change when we add a new machine version.
Maybe it's cleaner to pass the latest flag to
spapr_machine_latest_class_options? Rename it
spapr_machine_default_class_options?
This way we don't need to bother clearing is_default in other
machine types, we'll only set it for the latest one.
> > > +}
> > > +
> > > #define DEFINE_SPAPR_MACHINE(suffix, verstr, latest) \
> > > static void spapr_machine_##suffix##_class_init(ObjectClass *oc, \
> > > void *data) \
> > > @@ -4435,8 +4441,7 @@ static const TypeInfo spapr_machine_info = {
> > > MachineClass *mc = MACHINE_CLASS(oc); \
> > > spapr_machine_##suffix##_class_options(mc); \
> > > if (latest) { \
> > > - mc->alias = "pseries"; \
> > > - mc->is_default = 1; \
> > > + spapr_machine_latest_class_options(mc); \
> > > } \
> > > } \
> > > static const TypeInfo spapr_machine_##suffix##_info = { \
> > >
> >
> >