Re: [PATCH v2 07/13] spapr, pnv, xive: Add a "xive-fabric" link to the XIVE router

[David Gibson <david@gibson.dropbear.id.au>]

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On Thu, Dec 19, 2019 at 07:11:49PM +0100, Cédric Le Goater wrote:
> From: Greg Kurz <groug@kaod.org>
> 
> In order to get rid of qdev_get_machine(), first add a pointer to the
> XIVE fabric under the XIVE router and make it configurable through a
> QOM link property.
> 
> Configure it in the spapr and pnv machine. In the case of pnv, the XIVE
> routers are under the chip, so this is done with a QOM alias property of
> the POWER9 pnv chip.
> 
> Signed-off-by: Greg Kurz <groug@kaod.org>
> Signed-off-by: Cédric Le Goater <clg@kaod.org>

LGTM, but will need rebase.

> ---
>  include/hw/ppc/xive.h | 5 +++--
>  hw/intc/xive.c        | 8 ++++++++
>  hw/ppc/pnv.c          | 6 ++++++
>  hw/ppc/spapr_irq.c    | 2 ++
>  4 files changed, 19 insertions(+), 2 deletions(-)
> 
> diff --git a/include/hw/ppc/xive.h b/include/hw/ppc/xive.h
> index 1b7b89098f71..1ded82b1cda8 100644
> --- a/include/hw/ppc/xive.h
> +++ b/include/hw/ppc/xive.h
> @@ -324,9 +324,12 @@ typedef struct XiveTCTX {
>  /*
>   * XIVE Router
>   */
> +typedef struct XiveFabric XiveFabric;
>  
>  typedef struct XiveRouter {
>      SysBusDevice    parent;
> +
> +    XiveFabric *xfb;
>  } XiveRouter;
>  
>  #define TYPE_XIVE_ROUTER "xive-router"
> @@ -402,8 +405,6 @@ int xive_presenter_tctx_match(XivePresenter *xptr, XiveTCTX *tctx,
>   * XIVE Fabric (Interface between Interrupt Controller and Machine)
>   */
>  
> -typedef struct XiveFabric XiveFabric;
> -
>  #define TYPE_XIVE_FABRIC "xive-fabric"
>  #define XIVE_FABRIC(obj)                                     \
>      INTERFACE_CHECK(XiveFabric, (obj), TYPE_XIVE_FABRIC)
> diff --git a/hw/intc/xive.c b/hw/intc/xive.c
> index d4c6e21703b3..6df89b06da38 100644
> --- a/hw/intc/xive.c
> +++ b/hw/intc/xive.c
> @@ -1714,12 +1714,19 @@ void xive_router_notify(XiveNotifier *xn, uint32_t lisn)
>                             xive_get_field64(EAS_END_DATA,  eas.w));
>  }
>  
> +static Property xive_router_properties[] = {
> +    DEFINE_PROP_LINK("xive-fabric", XiveRouter, xfb,
> +                     TYPE_XIVE_FABRIC, XiveFabric *),
> +    DEFINE_PROP_END_OF_LIST(),
> +};
> +
>  static void xive_router_class_init(ObjectClass *klass, void *data)
>  {
>      DeviceClass *dc = DEVICE_CLASS(klass);
>      XiveNotifierClass *xnc = XIVE_NOTIFIER_CLASS(klass);
>  
>      dc->desc    = "XIVE Router Engine";
> +    dc->props   = xive_router_properties;
>      xnc->notify = xive_router_notify;
>  }
>  
> @@ -1727,6 +1734,7 @@ static const TypeInfo xive_router_info = {
>      .name          = TYPE_XIVE_ROUTER,
>      .parent        = TYPE_SYS_BUS_DEVICE,
>      .abstract      = true,
> +    .instance_size = sizeof(XiveRouter),
>      .class_size    = sizeof(XiveRouterClass),
>      .class_init    = xive_router_class_init,
>      .interfaces    = (InterfaceInfo[]) {
> diff --git a/hw/ppc/pnv.c b/hw/ppc/pnv.c
> index 2a1b15a69aed..915c80a24b3e 100644
> --- a/hw/ppc/pnv.c
> +++ b/hw/ppc/pnv.c
> @@ -804,6 +804,10 @@ static void pnv_init(MachineState *machine)
>          if (object_dynamic_cast(OBJECT(pnv), TYPE_XICS_FABRIC)) {
>              object_property_set_link(chip, OBJECT(pnv), "xics", &error_abort);
>          }
> +        if (object_dynamic_cast(OBJECT(pnv), TYPE_XIVE_FABRIC)) {
> +            object_property_set_link(chip, OBJECT(pnv), "xive-fabric",
> +                                     &error_abort);
> +        }
>          object_property_set_bool(chip, true, "realized", &error_fatal);
>      }
>      g_free(chip_typename);
> @@ -1224,6 +1228,8 @@ static void pnv_chip_power9_instance_init(Object *obj)
>  
>      object_initialize_child(obj, "xive", &chip9->xive, sizeof(chip9->xive),
>                              TYPE_PNV_XIVE, &error_abort, NULL);
> +    object_property_add_alias(obj, "xive-fabric", OBJECT(&chip9->xive),
> +                              "xive-fabric", &error_abort);
>  
>      object_initialize_child(obj, "psi",  &chip9->psi, sizeof(chip9->psi),
>                              TYPE_PNV9_PSI, &error_abort, NULL);
> diff --git a/hw/ppc/spapr_irq.c b/hw/ppc/spapr_irq.c
> index 07e08d6544a0..2b656649ad6a 100644
> --- a/hw/ppc/spapr_irq.c
> +++ b/hw/ppc/spapr_irq.c
> @@ -340,6 +340,8 @@ void spapr_irq_init(SpaprMachineState *spapr, Error **errp)
>           * priority
>           */
>          qdev_prop_set_uint32(dev, "nr-ends", nr_servers << 3);
> +        object_property_set_link(OBJECT(dev), OBJECT(spapr), "xive-fabric",
> +                                 &error_abort);
>          qdev_init_nofail(dev);
>  
>          spapr->xive = SPAPR_XIVE(dev);

-- 
David Gibson			| I'll have my music baroque, and my code
david AT gibson.dropbear.id.au	| minimalist, thank you.  NOT _the_ _other_
				| _way_ _around_!
http://www.ozlabs.org/~dgibson

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