Re: [Qemu-ppc] [PATCH] hw/ppc/spapr.c: cleaning up qdev_get_machine() calls

[Greg Kurz]

On Wed,  6 Sep 2017 15:43:05 -0300
Daniel Henrique Barboza <address@hidden> wrote:

> This patch removes the qdev_get_machine() calls that are made in
> spapr.c in situations where we can get an existing pointer for
> the MachineState by either passing it as an argument to the function
> or by using other already available pointers.
> 
> The following changes were made:
> 
> - spapr_node0_size: static function that is called two times:
> at spapr_setup_hpt_and_vrma and ppc_spapr_init. In both cases we can
> pass an existing MachineState pointer to it.
> 
> - spapr_build_fdt: MachineState pointer can be retrieved from
> the existing sPAPRMachineState pointer.
> 
> - spapr_boot_set: the opaque in the first arg is a sPAPRMachineState
> pointer as we can see inside ppc_spapr_init:
> 
>     qemu_register_boot_set(spapr_boot_set, spapr);
> 
> We can get a MachineState pointer from it.
> 
> - spapr_machine_device_plug and spapr_machine_device_unplug_request: the
> MachineState, sPAPRMachineState, MachineClass and sPAPRMachineClass pointers
> can all be retrieved from the HotplugHandler pointer.
> 
> Signed-off-by: Daniel Henrique Barboza <address@hidden>
> ---

It makes sense for me.

Reviewed-by: Greg Kurz <address@hidden>

>  hw/ppc/spapr.c | 19 +++++++++----------
>  1 file changed, 9 insertions(+), 10 deletions(-)
> 
> diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
> index cec441c..6ac3390 100644
> --- a/hw/ppc/spapr.c
> +++ b/hw/ppc/spapr.c
> @@ -390,10 +390,8 @@ static int spapr_fixup_cpu_dt(void *fdt, 
> sPAPRMachineState *spapr)
>      return ret;
>  }
>  
> -static hwaddr spapr_node0_size(void)
> +static hwaddr spapr_node0_size(MachineState *machine)
>  {
> -    MachineState *machine = MACHINE(qdev_get_machine());
> -
>      if (nb_numa_nodes) {
>          int i;
>          for (i = 0; i < nb_numa_nodes; ++i) {
> @@ -1027,7 +1025,7 @@ static void *spapr_build_fdt(sPAPRMachineState *spapr,
>                               hwaddr rtas_addr,
>                               hwaddr rtas_size)
>  {
> -    MachineState *machine = MACHINE(qdev_get_machine());
> +    MachineState *machine = MACHINE(spapr);
>      MachineClass *mc = MACHINE_GET_CLASS(machine);
>      sPAPRMachineClass *smc = SPAPR_MACHINE_GET_CLASS(machine);
>      int ret;
> @@ -1347,7 +1345,7 @@ void spapr_setup_hpt_and_vrma(sPAPRMachineState *spapr)
>      spapr_reallocate_hpt(spapr, hpt_shift, &error_fatal);
>  
>      if (spapr->vrma_adjust) {
> -        spapr->rma_size = kvmppc_rma_size(spapr_node0_size(),
> +        spapr->rma_size = kvmppc_rma_size(spapr_node0_size(MACHINE(spapr)),
>                                            spapr->htab_shift);
>      }
>      /* We're setting up a hash table, so that means we're not radix */
> @@ -2007,7 +2005,7 @@ static SaveVMHandlers savevm_htab_handlers = {
>  static void spapr_boot_set(void *opaque, const char *boot_device,
>                             Error **errp)
>  {
> -    MachineState *machine = MACHINE(qdev_get_machine());
> +    MachineState *machine = MACHINE(opaque);
>      machine->boot_order = g_strdup(boot_device);
>  }
>  
> @@ -2154,7 +2152,7 @@ static void ppc_spapr_init(MachineState *machine)
>      MemoryRegion *rma_region;
>      void *rma = NULL;
>      hwaddr rma_alloc_size;
> -    hwaddr node0_size = spapr_node0_size();
> +    hwaddr node0_size = spapr_node0_size(machine);
>      long load_limit, fw_size;
>      char *filename;
>      Error *resize_hpt_err = NULL;
> @@ -3198,7 +3196,8 @@ out:
>  static void spapr_machine_device_plug(HotplugHandler *hotplug_dev,
>                                        DeviceState *dev, Error **errp)
>  {
> -    sPAPRMachineClass *smc = SPAPR_MACHINE_GET_CLASS(qdev_get_machine());
> +    MachineState *ms = MACHINE(hotplug_dev);
> +    sPAPRMachineClass *smc = SPAPR_MACHINE_GET_CLASS(ms);
>  
>      if (object_dynamic_cast(OBJECT(dev), TYPE_PC_DIMM)) {
>          int node;
> @@ -3247,8 +3246,8 @@ static void spapr_machine_device_plug(HotplugHandler 
> *hotplug_dev,
>  static void spapr_machine_device_unplug_request(HotplugHandler *hotplug_dev,
>                                                  DeviceState *dev, Error 
> **errp)
>  {
> -    sPAPRMachineState *sms = SPAPR_MACHINE(qdev_get_machine());
> -    MachineClass *mc = MACHINE_GET_CLASS(qdev_get_machine());
> +    sPAPRMachineState *sms = SPAPR_MACHINE(OBJECT(hotplug_dev));
> +    MachineClass *mc = MACHINE_GET_CLASS(sms);
>  
>      if (object_dynamic_cast(OBJECT(dev), TYPE_PC_DIMM)) {
>          if (spapr_ovec_test(sms->ov5_cas, OV5_HP_EVT)) {

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