Re: [PATCH 5/5] hw/riscv/opentitan: Correct OpenTitanState parent type/size

[Alistair Francis <alistair23@gmail.com>]

On Sat, May 20, 2023 at 3:47 PM Philippe Mathieu-Daudé
<philmd@linaro.org> wrote:
>
> OpenTitanState is the 'machine' (or 'board') state: it isn't
> a SysBus device, but inherits from the MachineState type.
> Correct the instance size.
> Doing so we  avoid leaking an OpenTitanState pointer in
> opentitan_machine_init().
>
> Fixes: fe0fe4735e ("riscv: Initial commit of OpenTitan machine")
> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>

Reviewed-by: Alistair Francis <alistair.francis@wdc.com>

Alistair

> ---
>  include/hw/riscv/opentitan.h | 3 ++-
>  hw/riscv/opentitan.c         | 3 ++-
>  2 files changed, 4 insertions(+), 2 deletions(-)
>
> diff --git a/include/hw/riscv/opentitan.h b/include/hw/riscv/opentitan.h
> index 806ff73528..609473d07b 100644
> --- a/include/hw/riscv/opentitan.h
> +++ b/include/hw/riscv/opentitan.h
> @@ -55,10 +55,11 @@ struct LowRISCIbexSoCState {
>  };
>
>  #define TYPE_OPENTITAN_MACHINE MACHINE_TYPE_NAME("opentitan")
> +OBJECT_DECLARE_SIMPLE_TYPE(OpenTitanState, OPENTITAN_MACHINE)
>
>  typedef struct OpenTitanState {
>      /*< private >*/
> -    SysBusDevice parent_obj;
> +    MachineState parent_obj;
>
>      /*< public >*/
>      LowRISCIbexSoCState soc;
> diff --git a/hw/riscv/opentitan.c b/hw/riscv/opentitan.c
> index 9535308197..6a2fcc4ade 100644
> --- a/hw/riscv/opentitan.c
> +++ b/hw/riscv/opentitan.c
> @@ -78,8 +78,8 @@ static const MemMapEntry ibex_memmap[] = {
>  static void opentitan_machine_init(MachineState *machine)
>  {
>      MachineClass *mc = MACHINE_GET_CLASS(machine);
> +    OpenTitanState *s = OPENTITAN_MACHINE(machine);
>      const MemMapEntry *memmap = ibex_memmap;
> -    OpenTitanState *s = g_new0(OpenTitanState, 1);
>      MemoryRegion *sys_mem = get_system_memory();
>
>      if (machine->ram_size != mc->default_ram_size) {
> @@ -330,6 +330,7 @@ static const TypeInfo open_titan_types[] = {
>      }, {
>          .name           = TYPE_OPENTITAN_MACHINE,
>          .parent         = TYPE_MACHINE,
> +        .instance_size  = sizeof(OpenTitanState),
>          .class_init     = opentitan_machine_class_init,
>      }
>  };
> --
> 2.38.1
>
>