Re: [PATCH v2 07/11] hw/arm/virt: add plug handler for TPM on SysBus

[Stefan Berger <stefanb@linux.ibm.com>]

On 7/14/23 03:09, Joelle van Dyne wrote:
> TPM needs to know its own base address in order to generate its DSDT
> device entry.
> 
> Signed-off-by: Joelle van Dyne <j@getutm.app>
> ---
>   hw/arm/virt.c | 37 +++++++++++++++++++++++++++++++++++++
>   1 file changed, 37 insertions(+)
> 
> diff --git a/hw/arm/virt.c b/hw/arm/virt.c
> index 7d9dbc2663..432148ef47 100644
> --- a/hw/arm/virt.c
> +++ b/hw/arm/virt.c
> @@ -2732,6 +2732,37 @@ static void virt_memory_plug(HotplugHandler *hotplug_dev,
>                            dev, &error_abort);
>   }
> 
> +#ifdef CONFIG_TPM
> +static void virt_tpm_plug(VirtMachineState *vms, TPMIf *tpmif)
> +{
> +    PlatformBusDevice *pbus = PLATFORM_BUS_DEVICE(vms->platform_bus_dev);
> +    hwaddr pbus_base = vms->memmap[VIRT_PLATFORM_BUS].base;

+static void virt_tpm_plug(LoongArchMachineState *lams, TPMIf *tpmif)
+{
+    PlatformBusDevice *pbus = PLATFORM_BUS_DEVICE(lams->platform_bus_dev);
+    hwaddr pbus_base = VIRT_PLATFORM_BUS_BASEADDRESS;

These seem to be the differences between the loongarch and the arm virt implementations.
Why not have a function with this signature that both archs can call?

static void virt_tpm_plug(PlatformBusDevice *pbus, hwaddr pbus_base, TPMIf *tpmif)

Regards,
    Stefan