Re: [PATCH 06/20] xics: Create sPAPR specific ICS subtype

["Cédric Le Goater" <clg@kaod.org>]

On 25/09/2019 10:40, Greg Kurz wrote:
> On Wed, 25 Sep 2019 16:45:20 +1000
> David Gibson <david@gibson.dropbear.id.au> wrote:
> 
>> We create a subtype of TYPE_ICS specifically for sPAPR.  For now all this
>> does is move the setup of the PAPR specific hcalls and RTAS calls to
>> the realize() function for this, rather than requiring the PAPR code to
>> explicitly call xics_spapr_init().  In future it will have some more
>> function.
>>
>> Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
>> ---
> 
> LGTM, but for extra safety I would also introduce a SpaprIcsState typedef

why ? we have ICS_SPAPR() for the checks already.

> and use it everywhere where we only expect this subtype. Especially in
> the definition of SpaprMachineState.
> 
>>  hw/intc/xics_spapr.c        | 34 +++++++++++++++++++++++++++++++++-
>>  hw/ppc/spapr_irq.c          |  6 ++----
>>  include/hw/ppc/xics_spapr.h |  4 +++-
>>  3 files changed, 38 insertions(+), 6 deletions(-)
>>
>> diff --git a/hw/intc/xics_spapr.c b/hw/intc/xics_spapr.c
>> index 3e9444813a..e6dd004587 100644
>> --- a/hw/intc/xics_spapr.c
>> +++ b/hw/intc/xics_spapr.c
>> @@ -283,8 +283,18 @@ static void rtas_int_on(PowerPCCPU *cpu, SpaprMachineState *spapr,
>>      rtas_st(rets, 0, RTAS_OUT_SUCCESS);
>>  }
>>  
>> -void xics_spapr_init(SpaprMachineState *spapr)
>> +static void ics_spapr_realize(DeviceState *dev, Error **errp)
>>  {
>> +    ICSState *ics = ICS_SPAPR(dev);
>> +    ICSStateClass *icsc = ICS_GET_CLASS(ics);
>> +    Error *local_err = NULL;
>> +
>> +    icsc->parent_realize(dev, &local_err);
>> +    if (local_err) {
>> +        error_propagate(errp, local_err);
>> +        return;
>> +    }
>> +
>>      spapr_rtas_register(RTAS_IBM_SET_XIVE, "ibm,set-xive", rtas_set_xive);
>>      spapr_rtas_register(RTAS_IBM_GET_XIVE, "ibm,get-xive", rtas_get_xive);
>>      spapr_rtas_register(RTAS_IBM_INT_OFF, "ibm,int-off", rtas_int_off);
>> @@ -319,3 +329,25 @@ void spapr_dt_xics(SpaprMachineState *spapr, uint32_t nr_servers, void *fdt,
>>      _FDT(fdt_setprop_cell(fdt, node, "linux,phandle", phandle));
>>      _FDT(fdt_setprop_cell(fdt, node, "phandle", phandle));
>>  }
>> +
>> +static void ics_spapr_class_init(ObjectClass *klass, void *data)
>> +{
>> +    DeviceClass *dc = DEVICE_CLASS(klass);
>> +    ICSStateClass *isc = ICS_CLASS(klass);
>> +
>> +    device_class_set_parent_realize(dc, ics_spapr_realize,
>> +                                    &isc->parent_realize);
>> +}
>> +
>> +static const TypeInfo ics_spapr_info = {
>> +    .name = TYPE_ICS_SPAPR,
>> +    .parent = TYPE_ICS,
>> +    .class_init = ics_spapr_class_init,
>> +};
>> +
>> +static void xics_spapr_register_types(void)
>> +{
>> +    type_register_static(&ics_spapr_info);
>> +}
>> +
>> +type_init(xics_spapr_register_types)
>> diff --git a/hw/ppc/spapr_irq.c b/hw/ppc/spapr_irq.c
>> index 6c45d2a3c0..8c26fa2d1e 100644
>> --- a/hw/ppc/spapr_irq.c
>> +++ b/hw/ppc/spapr_irq.c
>> @@ -98,7 +98,7 @@ static void spapr_irq_init_xics(SpaprMachineState *spapr, int nr_irqs,
>>      Object *obj;
>>      Error *local_err = NULL;
>>  
>> -    obj = object_new(TYPE_ICS);
>> +    obj = object_new(TYPE_ICS_SPAPR);
>>      object_property_add_child(OBJECT(spapr), "ics", obj, &error_abort);
>>      object_property_add_const_link(obj, ICS_PROP_XICS, OBJECT(spapr),
>>                                     &error_fatal);
>> @@ -109,9 +109,7 @@ static void spapr_irq_init_xics(SpaprMachineState *spapr, int nr_irqs,
>>          return;
>>      }
>>  
>> -    spapr->ics = ICS(obj);
>> -
>> -    xics_spapr_init(spapr);
>> +    spapr->ics = ICS_SPAPR(obj);
>>  }
>>  
>>  static int spapr_irq_claim_xics(SpaprMachineState *spapr, int irq, bool lsi,
>> diff --git a/include/hw/ppc/xics_spapr.h b/include/hw/ppc/xics_spapr.h
>> index 5dabc9a138..691a6d00f7 100644
>> --- a/include/hw/ppc/xics_spapr.h
>> +++ b/include/hw/ppc/xics_spapr.h
>> @@ -31,11 +31,13 @@
>>  
>>  #define XICS_NODENAME "interrupt-controller"
>>  
>> +#define TYPE_ICS_SPAPR "ics-spapr"
>> +#define ICS_SPAPR(obj) OBJECT_CHECK(ICSState, (obj), TYPE_ICS_SPAPR)
>> +
>>  void spapr_dt_xics(SpaprMachineState *spapr, uint32_t nr_servers, void *fdt,
>>                     uint32_t phandle);
>>  int xics_kvm_connect(SpaprMachineState *spapr, Error **errp);
>>  void xics_kvm_disconnect(SpaprMachineState *spapr, Error **errp);
>>  bool xics_kvm_has_broken_disconnect(SpaprMachineState *spapr);
>> -void xics_spapr_init(SpaprMachineState *spapr);
>>  
>>  #endif /* XICS_SPAPR_H */
>