Re: [PATCH v2 10/14] hw/arm: Prefer arm_feature(EL2) over object_property_find(has_el2)

["Philippe Mathieu-Daudé" <philmd@linaro.org>]

On 9/1/24 19:09, Philippe Mathieu-Daudé wrote:
> The "has_el2" property is added to ARMCPU when the
> ARM_FEATURE_EL2 feature is available. Rather than
> checking whether the QOM property is present, directly
> check the feature.
> 
> Suggested-by: Markus Armbruster <armbru@redhat.com>
> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
> ---
>   hw/arm/vexpress.c  | 3 ++-
>   hw/arm/virt.c      | 2 +-
>   hw/cpu/a15mpcore.c | 6 ++++--
>   3 files changed, 7 insertions(+), 4 deletions(-)


> diff --git a/hw/cpu/a15mpcore.c b/hw/cpu/a15mpcore.c
> index cebfe142cf..1fa079b3b8 100644
> --- a/hw/cpu/a15mpcore.c
> +++ b/hw/cpu/a15mpcore.c
> @@ -73,9 +73,11 @@ static void a15mp_priv_realize(DeviceState *dev, Error **errp)
>               qdev_prop_set_bit(gicdev, "has-security-extensions", true);
>           }
>           /* Similarly for virtualization support */
> -        has_el2 = object_property_find(cpuobj, "has_el2") &&
> +        has_el2 = arm_feature(cpu_env(cpu), ARM_FEATURE_EL2);
> +        if (has_el2) {
>               object_property_get_bool(cpuobj, "has_el2", &error_abort);

Missing to be squashed on top:

-- >8 --
          if (has_el2) {
-            object_property_get_bool(cpuobj, "has_el2", &error_abort);
-            qdev_prop_set_bit(gicdev, "has-virtualization-extensions", 
true);
+            qdev_prop_set_bit(gicdev, "has-virtualization-extensions",
+                              object_property_get_bool(cpuobj, "has_el2",
+                                                       &error_abort));
          }
---

> -        qdev_prop_set_bit(gicdev, "has-virtualization-extensions", has_el2);
> +            qdev_prop_set_bit(gicdev, "has-virtualization-extensions", true);
> +        }
>       }
>   
>       if (!sysbus_realize(SYS_BUS_DEVICE(&s->gic), errp)) {