Re: [PATCH 05/13] ppc/pnv: Introduce PnvMachineClass::dt_power_mgt()

["Cédric Le Goater" <clg@kaod.org>]

On 13/12/2019 12:59, Greg Kurz wrote:
> We add an extra node to advertise power management on some machines,
> namely powernv9 and powernv10. This is achieved by using the
> pnv_is_power9() and pnv_is_power10() helpers.
> 
> This can be achieved with QOM. Add a method to the base class for
> powernv machines and have it implemented by machine types that
> support power management instead.
> 
> Signed-off-by: Greg Kurz <groug@kaod.org>


Reviewed-by: Cédric Le Goater <clg@kaod.org>

> ---
>  hw/ppc/pnv.c         |   10 ++++++----
>  include/hw/ppc/pnv.h |    8 ++++++--
>  2 files changed, 12 insertions(+), 6 deletions(-)
> 
> diff --git a/hw/ppc/pnv.c b/hw/ppc/pnv.c
> index 5ac149b149d8..efc00f4cb67a 100644
> --- a/hw/ppc/pnv.c
> +++ b/hw/ppc/pnv.c
> @@ -472,7 +472,7 @@ static void pnv_dt_isa(PnvMachineState *pnv, void *fdt)
>                         &args);
>  }
>  
> -static void pnv_dt_power_mgt(void *fdt)
> +static void pnv_dt_power_mgt(PnvMachineState *pnv, void *fdt)
>  {
>      int off;
>  
> @@ -540,9 +540,9 @@ static void *pnv_dt_create(MachineState *machine)
>          pnv_dt_bmc_sensors(pnv->bmc, fdt);
>      }
>  
> -    /* Create an extra node for power management on Power9 and Power10 */
> -    if (pnv_is_power9(pnv) || pnv_is_power10(pnv)) {
> -        pnv_dt_power_mgt(fdt);
> +    /* Create an extra node for power management on machines that support it */
> +    if (pmc->dt_power_mgt) {
> +        pmc->dt_power_mgt(pnv, fdt);
>      }
>  
>      return fdt;
> @@ -1710,6 +1710,7 @@ static void pnv_machine_power9_class_init(ObjectClass *oc, void *data)
>  
>      pmc->compat = compat;
>      pmc->compat_size = sizeof(compat);
> +    pmc->dt_power_mgt = pnv_dt_power_mgt;
>  }
>  
>  static void pnv_machine_power10_class_init(ObjectClass *oc, void *data)
> @@ -1723,6 +1724,7 @@ static void pnv_machine_power10_class_init(ObjectClass *oc, void *data)
>  
>      pmc->compat = compat;
>      pmc->compat_size = sizeof(compat);
> +    pmc->dt_power_mgt = pnv_dt_power_mgt;
>  }
>  
>  static void pnv_machine_class_init(ObjectClass *oc, void *data)
> diff --git a/include/hw/ppc/pnv.h b/include/hw/ppc/pnv.h
> index d534746bd493..8a42c199b65c 100644
> --- a/include/hw/ppc/pnv.h
> +++ b/include/hw/ppc/pnv.h
> @@ -190,6 +190,8 @@ PowerPCCPU *pnv_chip_find_cpu(PnvChip *chip, uint32_t pir);
>  #define PNV_MACHINE_CLASS(klass) \
>      OBJECT_CLASS_CHECK(PnvMachineClass, klass, TYPE_PNV_MACHINE)
>  
> +typedef struct PnvMachineState PnvMachineState;
> +
>  typedef struct PnvMachineClass {
>      /*< private >*/
>      MachineClass parent_class;
> @@ -197,9 +199,11 @@ typedef struct PnvMachineClass {
>      /*< public >*/
>      const char *compat;
>      int compat_size;
> +
> +    void (*dt_power_mgt)(PnvMachineState *pnv, void *fdt);
>  } PnvMachineClass;
>  
> -typedef struct PnvMachineState {
> +struct PnvMachineState {
>      /*< private >*/
>      MachineState parent_obj;
>  
> @@ -216,7 +220,7 @@ typedef struct PnvMachineState {
>      Notifier     powerdown_notifier;
>  
>      PnvPnor      *pnor;
> -} PnvMachineState;
> +};
>  
>  static inline bool pnv_chip_is_power9(const PnvChip *chip)
>  {
>