Re: [PATCH 05/24] aspeed: Don't create unwanted "cortex-a7-arm-cpu" devices

["Cédric Le Goater" <clg@kaod.org>]

On 5/18/20 7:03 AM, Markus Armbruster wrote:
> The number of CPUs is controlled by property "num-cpus".
> aspeed_soc_ast2600_init() creates the maximum supported number.
> aspeed_soc_ast2600_realize() realizes only the wanted number.  Works,
> although it leaves unrealized devices hanging around in the QOM
> composition tree.  Affects machines ast2600-evb and tacoma-bmc.
> 
> Make the init functions create only the wanted ones.  Visible in "info
> qom-tree"; here's the change for ast2600-evb:
> 
>      /machine (ast2600-evb-machine)
>        [...]
>        /soc (ast2600-a1)
>          [...]
>          /cpu[0] (cortex-a7-arm-cpu)
>            /unnamed-gpio-in[0] (irq)
>            /unnamed-gpio-in[1] (irq)
>            /unnamed-gpio-in[2] (irq)
>            /unnamed-gpio-in[3] (irq)
>     -    /cpu[1] (cortex-a7-arm-cpu)
>     -      /unnamed-gpio-in[0] (irq)
>     -      /unnamed-gpio-in[1] (irq)
>     -      /unnamed-gpio-in[2] (irq)
>     -      /unnamed-gpio-in[3] (irq)
>          /ehci[0] (platform-ehci-usb)
> 
> Cc: "Cédric Le Goater" <clg@kaod.org>
> Cc: Peter Maydell <peter.maydell@linaro.org>
> Cc: Andrew Jeffery <andrew@aj.id.au>
> Cc: Joel Stanley <joel@jms.id.au>
> Cc: qemu-arm@nongnu.org
> Signed-off-by: Markus Armbruster <armbru@redhat.com>

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

Joel, Andrew,

Shouldn't we enforce a default/min/max number of CPUs of 2 for the AST2600 ? 
That's the SoC definition. The fact it is configurable in the Aspeed model
was nice to have during bringup but we are now done.  

Thanks,

C.

> ---
>  hw/arm/aspeed_ast2600.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/hw/arm/aspeed_ast2600.c b/hw/arm/aspeed_ast2600.c
> index 0a6a77dd54..6ffa587a7f 100644
> --- a/hw/arm/aspeed_ast2600.c
> +++ b/hw/arm/aspeed_ast2600.c
> @@ -287,6 +287,9 @@ static void aspeed_soc_ast2600_realize(DeviceState *dev, Error **errp)
>              return;
>          }
>      }
> +    for (; i < sc->num_cpus; i++) {
> +        object_unparent(OBJECT(&s->cpu[i]));
> +    }
>  
>      /* A7MPCORE */
>      object_property_set_int(OBJECT(&s->a7mpcore), s->num_cpus, "num-cpu",
>