Re: [Qemu-devel] [PATCH v17 13/24] target/rx: Fix cpu types and names

["Philippe Mathieu-Daudé" <philmd@redhat.com>]

On 6/7/19 11:11 AM, Yoshinori Sato wrote:
> From: Richard Henderson <richard.henderson@linaro.org>
> 
> There was confusion here about abstract classes and naming cpus.
> We had registered a concrete class named "-rxcpu".  This was put
> into the default cpu fields, and matched, so basic tests worked.
> However, no value for -cpu could ever match in rx_cpu_class_by_name.
> 
> Rename the base class to "rx-cpu" and make it abstract.  This
> matches what we do for most other targets.  Create a new concrete
> cpu with the name "rx62n-rx-cpu".
> 
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp>
> ---
>  target/rx/cpu.h | 12 ++++++------
>  hw/rx/rx-virt.c |  2 +-
>  hw/rx/rx62n.c   |  2 +-
>  target/rx/cpu.c | 43 ++++++++++++++++++++++++++-----------------
>  4 files changed, 34 insertions(+), 25 deletions(-)
> 
> diff --git a/target/rx/cpu.h b/target/rx/cpu.h
> index 8c1a4e448d..a0b6975963 100644
> --- a/target/rx/cpu.h
> +++ b/target/rx/cpu.h
> @@ -24,14 +24,14 @@
>  #include "hw/registerfields.h"
>  #include "qom/cpu.h"
>  
> -#define TYPE_RXCPU "rxcpu"
> +#define TYPE_RX_CPU "rx-cpu"
>  
>  #define RXCPU_CLASS(klass)                                     \
> -    OBJECT_CLASS_CHECK(RXCPUClass, (klass), TYPE_RXCPU)
> +    OBJECT_CLASS_CHECK(RXCPUClass, (klass), TYPE_RX_CPU)
>  #define RXCPU(obj) \
> -    OBJECT_CHECK(RXCPU, (obj), TYPE_RXCPU)
> +    OBJECT_CHECK(RXCPU, (obj), TYPE_RX_CPU)
>  #define RXCPU_GET_CLASS(obj) \
> -    OBJECT_GET_CLASS(RXCPUClass, (obj), TYPE_RXCPU)
> +    OBJECT_GET_CLASS(RXCPUClass, (obj), TYPE_RX_CPU)
>  
>  /*
>   * RXCPUClass:
> @@ -164,9 +164,9 @@ static inline RXCPU *rx_env_get_cpu(CPURXState *env)
>  
>  #define ENV_OFFSET offsetof(RXCPU, env)
>  
> -#define RX_CPU_TYPE_SUFFIX "-" TYPE_RXCPU
> +#define RX_CPU_TYPE_SUFFIX "-" TYPE_RX_CPU
>  #define RX_CPU_TYPE_NAME(model) model RX_CPU_TYPE_SUFFIX
> -#define CPU_RESOLVING_TYPE TYPE_RXCPU
> +#define CPU_RESOLVING_TYPE TYPE_RX_CPU
>  
>  extern const char rx_crname[][6];
>  
> diff --git a/hw/rx/rx-virt.c b/hw/rx/rx-virt.c
> index 3deb7cb335..72a2989fcf 100644
> --- a/hw/rx/rx-virt.c
> +++ b/hw/rx/rx-virt.c
> @@ -88,7 +88,7 @@ static void rxvirt_class_init(ObjectClass *oc, void *data)
>      mc->desc = "RX QEMU Virtual Target";
>      mc->init = rxvirt_init;
>      mc->is_default = 1;
> -    mc->default_cpu_type = TYPE_RXCPU;
> +    mc->default_cpu_type = RX_CPU_TYPE_NAME("rx62n");
>  }
>  
>  static const TypeInfo rxvirt_type = {
> diff --git a/hw/rx/rx62n.c b/hw/rx/rx62n.c
> index c6660b75b4..3a8fe7b0bf 100644
> --- a/hw/rx/rx62n.c
> +++ b/hw/rx/rx62n.c
> @@ -195,7 +195,7 @@ static void rx62n_realize(DeviceState *dev, Error **errp)
>      }
>  
>      object_initialize_child(OBJECT(s), "cpu", &s->cpu,
> -                            sizeof(RXCPU), TYPE_RXCPU,
> +                            sizeof(RXCPU), RX_CPU_TYPE_NAME("rx62n"),
>                              errp, NULL);
>      object_property_set_bool(OBJECT(&s->cpu), true, "realized", errp);
>  
> diff --git a/target/rx/cpu.c b/target/rx/cpu.c
> index 3268077d08..41fe1de4bb 100644
> --- a/target/rx/cpu.c
> +++ b/target/rx/cpu.c
> @@ -74,13 +74,14 @@ static void rx_cpu_list_entry(gpointer data, gpointer user_data)
>      const char *typename = object_class_get_name(OBJECT_CLASS(data));
>      int len = strlen(typename) - strlen(RX_CPU_TYPE_SUFFIX);
>  
> -    qemu_printf("%.*s\n", len, typename);
> +    qemu_printf("  %.*s\n", len, typename);
>  }
>  
>  void rx_cpu_list(void)
>  {
> -    GSList *list;
> -    list = object_class_get_list_sorted(TYPE_RXCPU, false);
> +    GSList *list = object_class_get_list_sorted(TYPE_RX_CPU, false);
> +
> +    qemu_printf("Available CPUs:\n");
>      g_slist_foreach(list, rx_cpu_list_entry, NULL);
>      g_slist_free(list);
>  }
> @@ -88,15 +89,17 @@ void rx_cpu_list(void)
>  static ObjectClass *rx_cpu_class_by_name(const char *cpu_model)
>  {
>      ObjectClass *oc;
> -    char *typename = NULL;
> +    char *typename;
>  
> -    typename = g_strdup_printf(RX_CPU_TYPE_NAME(""));
> +    typename = g_strdup_printf(RX_CPU_TYPE_NAME("%s"), cpu_model);
>      oc = object_class_by_name(typename);
> -    if (oc != NULL && object_class_is_abstract(oc)) {
> -        oc = NULL;
> -    }
> -
>      g_free(typename);
> +
> +    if (oc == NULL ||
> +        object_class_is_abstract(oc) ||
> +        !object_class_dynamic_cast(oc, TYPE_RX_CPU)) {
> +        return NULL;
> +    }
>      return oc;
>  }
>  
> @@ -166,7 +169,7 @@ static void rx_cpu_init(Object *obj)
>      qdev_init_gpio_in(DEVICE(cpu), rx_cpu_set_irq, 2);
>  }
>  
> -static void rxcpu_class_init(ObjectClass *klass, void *data)
> +static void rx_cpu_class_init(ObjectClass *klass, void *data)
>  {
>      DeviceClass *dc = DEVICE_CLASS(klass);
>      CPUClass *cc = CPU_CLASS(klass);
> @@ -195,22 +198,28 @@ static void rxcpu_class_init(ObjectClass *klass, void *data)
>      cc->gdb_num_core_regs = 26;
>  }
>  
> -static const TypeInfo rxcpu_info = {
> -    .name = TYPE_RXCPU,
> +static const TypeInfo rx_cpu_info = {
> +    .name = TYPE_RX_CPU,
>      .parent = TYPE_CPU,
>      .instance_size = sizeof(RXCPU),
>      .instance_init = rx_cpu_init,
> -    .abstract = false,
> +    .abstract = true,
>      .class_size = sizeof(RXCPUClass),
> -    .class_init = rxcpu_class_init,
> +    .class_init = rx_cpu_class_init,
> +};
> +
> +static const TypeInfo rx62n_rx_cpu_info = {
> +    .name = RX_CPU_TYPE_NAME("rx62n"),
> +    .parent = TYPE_RX_CPU,
>  };
>  
> -static void rxcpu_register_types(void)
> +static void rx_cpu_register_types(void)
>  {
> -    type_register_static(&rxcpu_info);
> +    type_register_static(&rx_cpu_info);
> +    type_register_static(&rx62n_rx_cpu_info);
>  }
>  
> -type_init(rxcpu_register_types)
> +type_init(rx_cpu_register_types)
>  
>  static uint32_t extable[32];
>  
> 

Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>