riscv/virt: Manually define the machine

Instead of using the DEFINE_MACHINE() macro to define the machine let's
do it manually. This allows us to use the machine object to create
RISCVVirtState. This is required to add children and aliases to the
machine.

This patch is no functional change.

Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Tested-by: Bin Meng <bmeng.cn@gmail.com>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>

1 files changed, 6 insertions, 1 deletions

diff --git a/include/hw/riscv/virt.h b/include/hw/riscv/virt.h
index 68978a13e8..3d875305d3 100644
--- a/include/hw/riscv/virt.h
+++ b/include/hw/riscv/virt.h
@@ -22,13 +22,18 @@
 #include "hw/riscv/riscv_hart.h"
 #include "hw/sysbus.h"
 
+#define TYPE_RISCV_VIRT_MACHINE MACHINE_TYPE_NAME("virt")
+#define RISCV_VIRT_MACHINE(obj) \
+    OBJECT_CHECK(RISCVVirtState, (obj), TYPE_RISCV_VIRT_MACHINE)
+
 typedef struct {
     /*< private >*/
-    SysBusDevice parent_obj;
+    MachineState parent;
 
     /*< public >*/
     RISCVHartArrayState soc;
     DeviceState *plic;
+
     void *fdt;
     int fdt_size;
 } RISCVVirtState;