Re: [PATCH for-8.0 02/19] target/arm: Convert to 3-phase reset

[Alistair Francis]

On Thu, Nov 24, 2022 at 9:58 PM Peter Maydell <peter.maydell@linaro.org> wrote:
>
> Convert the Arm CPU class to use 3-phase reset, so it doesn't
> need to use device_class_set_parent_reset() any more.
>
> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

Reviewed-by: Alistair Francis <alistair.francis@wdc.com>

Alistair

> ---
>  target/arm/cpu-qom.h |  4 ++--
>  target/arm/cpu.c     | 13 +++++++++----
>  2 files changed, 11 insertions(+), 6 deletions(-)
>
> diff --git a/target/arm/cpu-qom.h b/target/arm/cpu-qom.h
> index 64c44cef2dd..514c22ced9b 100644
> --- a/target/arm/cpu-qom.h
> +++ b/target/arm/cpu-qom.h
> @@ -43,7 +43,7 @@ void aarch64_cpu_register(const ARMCPUInfo *info);
>  /**
>   * ARMCPUClass:
>   * @parent_realize: The parent class' realize handler.
> - * @parent_reset: The parent class' reset handler.
> + * @parent_phases: The parent class' reset phase handlers.
>   *
>   * An ARM CPU model.
>   */
> @@ -54,7 +54,7 @@ struct ARMCPUClass {
>
>      const ARMCPUInfo *info;
>      DeviceRealize parent_realize;
> -    DeviceReset parent_reset;
> +    ResettablePhases parent_phases;
>  };
>
>
> diff --git a/target/arm/cpu.c b/target/arm/cpu.c
> index a021df9e9e8..5bad065579f 100644
> --- a/target/arm/cpu.c
> +++ b/target/arm/cpu.c
> @@ -202,14 +202,16 @@ static void cp_reg_check_reset(gpointer key, gpointer 
> value,  gpointer opaque)
>      assert(oldvalue == newvalue);
>  }
>
> -static void arm_cpu_reset(DeviceState *dev)
> +static void arm_cpu_reset_hold(Object *obj)
>  {
> -    CPUState *s = CPU(dev);
> +    CPUState *s = CPU(obj);
>      ARMCPU *cpu = ARM_CPU(s);
>      ARMCPUClass *acc = ARM_CPU_GET_CLASS(cpu);
>      CPUARMState *env = &cpu->env;
>
> -    acc->parent_reset(dev);
> +    if (acc->parent_phases.hold) {
> +        acc->parent_phases.hold(obj);
> +    }
>
>      memset(env, 0, offsetof(CPUARMState, end_reset_fields));
>
> @@ -2210,12 +2212,15 @@ static void arm_cpu_class_init(ObjectClass *oc, void 
> *data)
>      ARMCPUClass *acc = ARM_CPU_CLASS(oc);
>      CPUClass *cc = CPU_CLASS(acc);
>      DeviceClass *dc = DEVICE_CLASS(oc);
> +    ResettableClass *rc = RESETTABLE_CLASS(oc);
>
>      device_class_set_parent_realize(dc, arm_cpu_realizefn,
>                                      &acc->parent_realize);
>
>      device_class_set_props(dc, arm_cpu_properties);
> -    device_class_set_parent_reset(dc, arm_cpu_reset, &acc->parent_reset);
> +
> +    resettable_class_set_parent_phases(rc, NULL, arm_cpu_reset_hold, NULL,
> +                                       &acc->parent_phases);
>
>      cc->class_by_name = arm_cpu_class_by_name;
>      cc->has_work = arm_cpu_has_work;
> --
> 2.25.1
>
>