Re: [Qemu-devel] [PATCH 09/10] spapr/irq: Use the "simple" ICS class for KVM

[Greg Kurz <groug@kaod.org>]

On Fri, 15 Feb 2019 14:02:16 +0100
Cédric Le Goater <clg@kaod.org> wrote:

> On 2/15/19 12:40 PM, Greg Kurz wrote:
> > The "simple" ICS class knows how to interract with KVM. Adapt sPAPR to use
> > it instead of the ICS KVM class.  
> 
> You are changing the type name. What about migration ? 
> 

Huh ?!? I don't see how the type name would relate to migration. AFAICT they
aren't being referred to in the vmstate descriptors in xics.c.

> Can't we move the xics_kvm_init() and xics_spapr_init() call under 
> spapr_ics_create() ? It would simplify a lot the routine I think
> if these were done before creating the ICSState. 
> 

I'll look into that if there's a v2 or else in a followup patch.

> C.
> 
> > Signed-off-by: Greg Kurz <groug@kaod.org>
> > ---
> >  hw/ppc/spapr_irq.c |   15 +++++++--------
> >  1 file changed, 7 insertions(+), 8 deletions(-)
> > 
> > diff --git a/hw/ppc/spapr_irq.c b/hw/ppc/spapr_irq.c
> > index 9f43b7b3bf16..4aa8165307c7 100644
> > --- a/hw/ppc/spapr_irq.c
> > +++ b/hw/ppc/spapr_irq.c
> > @@ -67,13 +67,12 @@ void spapr_irq_msi_reset(sPAPRMachineState *spapr)
> >   */
> >  
> >  static ICSState *spapr_ics_create(sPAPRMachineState *spapr,
> > -                                  const char *type_ics,
> >                                    int nr_irqs, Error **errp)
> >  {
> >      Error *local_err = NULL;
> >      Object *obj;
> >  
> > -    obj = object_new(type_ics);
> > +    obj = object_new(TYPE_ICS_SIMPLE);
> >      object_property_add_child(OBJECT(spapr), "ics", obj, &error_abort);
> >      object_property_add_const_link(obj, ICS_PROP_XICS, OBJECT(spapr),
> >                                     &error_abort);
> > @@ -98,14 +97,14 @@ static void spapr_irq_init_xics(sPAPRMachineState *spapr, int nr_irqs,
> >  {
> >      MachineState *machine = MACHINE(spapr);
> >      Error *local_err = NULL;
> > +    bool xics_kvm = false;
> >  
> >      if (kvm_enabled()) {
> >          if (machine_kernel_irqchip_allowed(machine) &&
> >              !xics_kvm_init(spapr, &local_err)) {
> > -            spapr->ics = spapr_ics_create(spapr, TYPE_ICS_KVM, nr_irqs,
> > -                                          &local_err);
> > +            xics_kvm = true;
> >          }
> > -        if (machine_kernel_irqchip_required(machine) && !spapr->ics) {
> > +        if (machine_kernel_irqchip_required(machine) && !xics_kvm) {
> >              error_prepend(&local_err,
> >                            "kernel_irqchip requested but unavailable: ");
> >              goto error;
> > @@ -114,12 +113,12 @@ static void spapr_irq_init_xics(sPAPRMachineState *spapr, int nr_irqs,
> >          local_err = NULL;
> >      }
> >  
> > -    if (!spapr->ics) {
> > +    if (!xics_kvm) {
> >          xics_spapr_init(spapr);
> > -        spapr->ics = spapr_ics_create(spapr, TYPE_ICS_SIMPLE, nr_irqs,
> > -                                      &local_err);
> >      }
> >  
> > +    spapr->ics = spapr_ics_create(spapr, nr_irqs, &local_err);
> > +
> >  error:
> >      error_propagate(errp, local_err);
> >  }
> >   
>