Re: [PATCH 04/10] ppc/pnv: Introduce a "xics" property under the POWER8 chip

[Greg Kurz <groug@kaod.org>]

On Thu, 19 Dec 2019 08:29:55 +0100
Cédric Le Goater <clg@kaod.org> wrote:

> POWER8 is the only chip using the XICS interface. Add a "xics" link
> and a XICSFabric attribute under this chip to remove the use of
> qdev_get_machine()
> 
> Signed-off-by: Cédric Le Goater <clg@kaod.org>
> ---

Reviewed-by: Greg Kurz <groug@kaod.org>

>  include/hw/ppc/pnv.h |  2 ++
>  hw/ppc/pnv.c         | 26 ++++++++++++++++++++------
>  2 files changed, 22 insertions(+), 6 deletions(-)
> 
> diff --git a/include/hw/ppc/pnv.h b/include/hw/ppc/pnv.h
> index f31180618672..8b957dfb5736 100644
> --- a/include/hw/ppc/pnv.h
> +++ b/include/hw/ppc/pnv.h
> @@ -74,6 +74,8 @@ typedef struct Pnv8Chip {
>      Pnv8Psi      psi;
>      PnvOCC       occ;
>      PnvHomer     homer;
> +
> +    XICSFabric    *xics;
>  } Pnv8Chip;
>  
>  #define TYPE_PNV9_CHIP "pnv9-chip"
> diff --git a/hw/ppc/pnv.c b/hw/ppc/pnv.c
> index d6fe5ba13535..6500efba1317 100644
> --- a/hw/ppc/pnv.c
> +++ b/hw/ppc/pnv.c
> @@ -797,6 +797,13 @@ static void pnv_init(MachineState *machine)
>           */
>          object_property_set_link(chip, OBJECT(sysmem), "system-memory",
>                                   &error_abort);
> +        /*
> +         * The POWER8 machine use the XICS interrupt interface.
> +         * Propagate the XICS fabric to the chip and its controllers.
> +         */
> +        if (object_dynamic_cast(OBJECT(pnv), TYPE_XICS_FABRIC)) {
> +            object_property_set_link(chip, OBJECT(pnv), "xics", &error_abort);
> +        }
>          object_property_set_bool(chip, true, "realized", &error_fatal);
>      }
>      g_free(chip_typename);
> @@ -838,12 +845,12 @@ static uint32_t pnv_chip_core_pir_p8(PnvChip *chip, uint32_t core_id)
>  static void pnv_chip_power8_intc_create(PnvChip *chip, PowerPCCPU *cpu,
>                                          Error **errp)
>  {
> +    Pnv8Chip *chip8 = PNV8_CHIP(chip);
>      Error *local_err = NULL;
>      Object *obj;
>      PnvCPUState *pnv_cpu = pnv_cpu_state(cpu);
>  
> -    obj = icp_create(OBJECT(cpu), TYPE_PNV_ICP, XICS_FABRIC(qdev_get_machine()),
> -                     &local_err);
> +    obj = icp_create(OBJECT(cpu), TYPE_PNV_ICP, chip8->xics, &local_err);
>      if (local_err) {
>          error_propagate(errp, local_err);
>          return;
> @@ -997,6 +1004,12 @@ static void pnv_chip_power8_instance_init(Object *obj)
>  {
>      Pnv8Chip *chip8 = PNV8_CHIP(obj);
>  
> +    object_property_add_link(obj, "xics", TYPE_XICS_FABRIC,
> +                             (Object **)&chip8->xics,
> +                             object_property_allow_set_link,
> +                             OBJ_PROP_LINK_STRONG,
> +                             &error_abort);
> +
>      object_initialize_child(obj, "psi",  &chip8->psi, sizeof(chip8->psi),
>                              TYPE_PNV8_PSI, &error_abort, NULL);
>  
> @@ -1016,7 +1029,6 @@ static void pnv_chip_icp_realize(Pnv8Chip *chip8, Error **errp)
>      PnvChipClass *pcc = PNV_CHIP_GET_CLASS(chip);
>      int i, j;
>      char *name;
> -    XICSFabric *xi = XICS_FABRIC(qdev_get_machine());
>  
>      name = g_strdup_printf("icp-%x", chip->chip_id);
>      memory_region_init(&chip8->icp_mmio, OBJECT(chip), name, PNV_ICP_SIZE);
> @@ -1032,7 +1044,7 @@ static void pnv_chip_icp_realize(Pnv8Chip *chip8, Error **errp)
>  
>          for (j = 0; j < CPU_CORE(pnv_core)->nr_threads; j++) {
>              uint32_t pir = pcc->core_pir(chip, core_hwid) + j;
> -            PnvICPState *icp = PNV_ICP(xics_icp_get(xi, pir));
> +            PnvICPState *icp = PNV_ICP(xics_icp_get(chip8->xics, pir));
>  
>              memory_region_add_subregion(&chip8->icp_mmio, pir << 12,
>                                          &icp->mmio);
> @@ -1048,6 +1060,8 @@ static void pnv_chip_power8_realize(DeviceState *dev, Error **errp)
>      Pnv8Psi *psi8 = &chip8->psi;
>      Error *local_err = NULL;
>  
> +    assert(chip8->xics);
> +
>      /* XSCOM bridge is first */
>      pnv_xscom_realize(chip, PNV_XSCOM_SIZE, &local_err);
>      if (local_err) {
> @@ -1067,8 +1081,8 @@ static void pnv_chip_power8_realize(DeviceState *dev, Error **errp)
>                              "bar", &error_fatal);
>      object_property_set_link(OBJECT(&chip8->psi), OBJECT(chip->system_memory),
>                               "system-memory", &error_abort);
> -    object_property_set_link(OBJECT(&chip8->psi), OBJECT(qdev_get_machine()),
> -                             ICS_PROP_XICS, &error_abort);
> +    object_property_set_link(OBJECT(&chip8->psi), OBJECT(chip8->xics),
> +                              ICS_PROP_XICS, &error_abort);
>      object_property_set_bool(OBJECT(&chip8->psi), true, "realized", &local_err);
>      if (local_err) {
>          error_propagate(errp, local_err);