Re: [PATCH 02/22] hw/intc/apic: Pass CPU using QOM link property

[Igor Mammedov]

On Mon, 18 Sep 2023 18:02:35 +0200
Philippe Mathieu-Daudé <philmd@linaro.org> wrote:

> QOM objects shouldn't access each other internals fields
> except using the QOM API.
> 
> Declare the 'cpu' and 'base-addr' properties, set them
> using object_property_set_link() and qdev_prop_set_uint32()
> respectively.
> 
> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>

Reviewed-by: Igor Mammedov <imammedo@redhat.com>

> ---
>  hw/intc/apic_common.c    |  2 ++
>  target/i386/cpu-sysemu.c | 11 ++++++-----
>  2 files changed, 8 insertions(+), 5 deletions(-)
> 
> diff --git a/hw/intc/apic_common.c b/hw/intc/apic_common.c
> index 68ad30e2f5..e28f7402ab 100644
> --- a/hw/intc/apic_common.c
> +++ b/hw/intc/apic_common.c
> @@ -394,6 +394,8 @@ static Property apic_properties_common[] = {
>                      true),
>      DEFINE_PROP_BOOL("legacy-instance-id", APICCommonState, 
> legacy_instance_id,
>                       false),
> +    DEFINE_PROP_LINK("cpu", APICCommonState, cpu, TYPE_X86_CPU, X86CPU *),
> +    DEFINE_PROP_UINT32("base-addr", APICCommonState, apicbase, 0),
>      DEFINE_PROP_END_OF_LIST(),
>  };
>  
> diff --git a/target/i386/cpu-sysemu.c b/target/i386/cpu-sysemu.c
> index 6a164d3769..6edfb7e2af 100644
> --- a/target/i386/cpu-sysemu.c
> +++ b/target/i386/cpu-sysemu.c
> @@ -269,7 +269,6 @@ APICCommonClass *apic_get_class(Error **errp)
>  
>  void x86_cpu_apic_create(X86CPU *cpu, Error **errp)
>  {
> -    APICCommonState *apic;
>      APICCommonClass *apic_class = apic_get_class(errp);
>  
>      assert(apic_class);
> @@ -279,11 +278,13 @@ void x86_cpu_apic_create(X86CPU *cpu, Error **errp)
>                                OBJECT(cpu->apic_state));
>      object_unref(OBJECT(cpu->apic_state));
>  
> +    if (!object_property_set_link(OBJECT(cpu->apic_state), "cpu",
> +                                  OBJECT(cpu), errp)) {
> +        return;
> +    }
>      qdev_prop_set_uint32(cpu->apic_state, "id", cpu->apic_id);
> -    /* TODO: convert to link<> */
> -    apic = APIC_COMMON(cpu->apic_state);
> -    apic->cpu = cpu;
> -    apic->apicbase = APIC_DEFAULT_ADDRESS | MSR_IA32_APICBASE_ENABLE;
> +    qdev_prop_set_uint32(cpu->apic_state, "base-addr",
> +                         APIC_DEFAULT_ADDRESS | MSR_IA32_APICBASE_ENABLE);
>  }
>  
>  void x86_cpu_apic_realize(X86CPU *cpu, Error **errp)