diff --git a/include/hw/acpi/generic_event_device.h b/include/hw/acpi/generic_event_device.h
index ac921e9..6bed92e 100644
--- a/include/hw/acpi/generic_event_device.h
+++ b/include/hw/acpi/generic_event_device.h
@@ -67,9 +67,7 @@
 #define ACPI_POWER_BUTTON_DEVICE "PWRB"
 
 #define TYPE_ACPI_GED "acpi-ged"
-typedef struct AcpiGedState AcpiGedState;
-DECLARE_INSTANCE_CHECKER(AcpiGedState, ACPI_GED,
-                         TYPE_ACPI_GED)
+OBJECT_DECLARE_SIMPLE_TYPE(AcpiGedState, ACPI_GED)
 
 #define TYPE_ACPI_GED_X86 "acpi-ged-x86"
 #define ACPI_GED_X86(obj) \
diff --git a/include/hw/acpi/vmgenid.h b/include/hw/acpi/vmgenid.h
index aff574d..d50fbac 100644
--- a/include/hw/acpi/vmgenid.h
+++ b/include/hw/acpi/vmgenid.h
@@ -16,9 +16,7 @@
                                        * OVMF SDT Header Probe Supressor
                                        */
 
-typedef struct VmGenIdState VmGenIdState;
-DECLARE_INSTANCE_CHECKER(VmGenIdState, VMGENID,
-                         TYPE_VMGENID)
+OBJECT_DECLARE_SIMPLE_TYPE(VmGenIdState, VMGENID)
 
 struct VmGenIdState {
     DeviceClass parent_obj;
diff --git a/include/hw/adc/stm32f2xx_adc.h b/include/hw/adc/stm32f2xx_adc.h
index 6a4f8e9..42b4898 100644
--- a/include/hw/adc/stm32f2xx_adc.h
+++ b/include/hw/adc/stm32f2xx_adc.h
@@ -59,9 +59,7 @@
 #define ADC_COMMON_ADDRESS 0x100
 
 #define TYPE_STM32F2XX_ADC "stm32f2xx-adc"
-typedef struct STM32F2XXADCState STM32F2XXADCState;
-DECLARE_INSTANCE_CHECKER(STM32F2XXADCState, STM32F2XX_ADC,
-                         TYPE_STM32F2XX_ADC)
+OBJECT_DECLARE_SIMPLE_TYPE(STM32F2XXADCState, STM32F2XX_ADC)
 
 struct STM32F2XXADCState {
     /* <private> */
diff --git a/include/hw/arm/allwinner-a10.h b/include/hw/arm/allwinner-a10.h
index d13b6cf..a76dc7b 100644
--- a/include/hw/arm/allwinner-a10.h
+++ b/include/hw/arm/allwinner-a10.h
@@ -22,9 +22,7 @@
 #define AW_A10_NUM_USB          2
 
 #define TYPE_AW_A10 "allwinner-a10"
-typedef struct AwA10State AwA10State;
-DECLARE_INSTANCE_CHECKER(AwA10State, AW_A10,
-                         TYPE_AW_A10)
+OBJECT_DECLARE_SIMPLE_TYPE(AwA10State, AW_A10)
 
 struct AwA10State {
     /*< private >*/
diff --git a/include/hw/arm/allwinner-h3.h b/include/hw/arm/allwinner-h3.h
index a93e019..cc308a5 100644
--- a/include/hw/arm/allwinner-h3.h
+++ b/include/hw/arm/allwinner-h3.h
@@ -106,9 +106,7 @@
 #define TYPE_AW_H3 "allwinner-h3"
 
 /** Convert input object to Allwinner H3 state object */
-typedef struct AwH3State AwH3State;
-DECLARE_INSTANCE_CHECKER(AwH3State, AW_H3,
-                         TYPE_AW_H3)
+OBJECT_DECLARE_SIMPLE_TYPE(AwH3State, AW_H3)
 
 /** @} */
 
diff --git a/include/hw/arm/armv7m.h b/include/hw/arm/armv7m.h
index dcb891d..0791dcb 100644
--- a/include/hw/arm/armv7m.h
+++ b/include/hw/arm/armv7m.h
@@ -16,9 +16,7 @@
 #include "qom/object.h"
 
 #define TYPE_BITBAND "ARM,bitband-memory"
-typedef struct BitBandState BitBandState;
-DECLARE_INSTANCE_CHECKER(BitBandState, BITBAND,
-                         TYPE_BITBAND)
+OBJECT_DECLARE_SIMPLE_TYPE(BitBandState, BITBAND)
 
 struct BitBandState {
     /*< private >*/
@@ -32,9 +30,7 @@
 };
 
 #define TYPE_ARMV7M "armv7m"
-typedef struct ARMv7MState ARMv7MState;
-DECLARE_INSTANCE_CHECKER(ARMv7MState, ARMV7M,
-                         TYPE_ARMV7M)
+OBJECT_DECLARE_SIMPLE_TYPE(ARMv7MState, ARMV7M)
 
 #define ARMV7M_NUM_BITBANDS 2
 
diff --git a/include/hw/arm/bcm2835_peripherals.h b/include/hw/arm/bcm2835_peripherals.h
index b4d3ae1..13d7c4c 100644
--- a/include/hw/arm/bcm2835_peripherals.h
+++ b/include/hw/arm/bcm2835_peripherals.h
@@ -32,9 +32,7 @@
 #include "qom/object.h"
 
 #define TYPE_BCM2835_PERIPHERALS "bcm2835-peripherals"
-typedef struct BCM2835PeripheralState BCM2835PeripheralState;
-DECLARE_INSTANCE_CHECKER(BCM2835PeripheralState, BCM2835_PERIPHERALS,
-                         TYPE_BCM2835_PERIPHERALS)
+OBJECT_DECLARE_SIMPLE_TYPE(BCM2835PeripheralState, BCM2835_PERIPHERALS)
 
 struct BCM2835PeripheralState {
     /*< private >*/
diff --git a/include/hw/arm/digic.h b/include/hw/arm/digic.h
index f3ba398..8f2735c 100644
--- a/include/hw/arm/digic.h
+++ b/include/hw/arm/digic.h
@@ -25,9 +25,7 @@
 
 #define TYPE_DIGIC "digic"
 
-typedef struct DigicState DigicState;
-DECLARE_INSTANCE_CHECKER(DigicState, DIGIC,
-                         TYPE_DIGIC)
+OBJECT_DECLARE_SIMPLE_TYPE(DigicState, DIGIC)
 
 #define DIGIC4_NB_TIMERS 3
 
diff --git a/include/hw/arm/exynos4210.h b/include/hw/arm/exynos4210.h
index c2de1dc..60b9e12 100644
--- a/include/hw/arm/exynos4210.h
+++ b/include/hw/arm/exynos4210.h
@@ -103,11 +103,9 @@
     I2CBus *i2c_if[EXYNOS4210_I2C_NUMBER];
     qemu_or_irq pl330_irq_orgate[EXYNOS4210_NUM_DMA];
 };
-typedef struct Exynos4210State Exynos4210State;
 
 #define TYPE_EXYNOS4210_SOC "exynos4210"
-DECLARE_INSTANCE_CHECKER(Exynos4210State, EXYNOS4210_SOC,
-                         TYPE_EXYNOS4210_SOC)
+OBJECT_DECLARE_SIMPLE_TYPE(Exynos4210State, EXYNOS4210_SOC)
 
 void exynos4210_write_secondary(ARMCPU *cpu,
         const struct arm_boot_info *info);
diff --git a/include/hw/arm/fsl-imx25.h b/include/hw/arm/fsl-imx25.h
index e239505..971f35d 100644
--- a/include/hw/arm/fsl-imx25.h
+++ b/include/hw/arm/fsl-imx25.h
@@ -35,9 +35,7 @@
 #include "qom/object.h"
 
 #define TYPE_FSL_IMX25 "fsl,imx25"
-typedef struct FslIMX25State FslIMX25State;
-DECLARE_INSTANCE_CHECKER(FslIMX25State, FSL_IMX25,
-                         TYPE_FSL_IMX25)
+OBJECT_DECLARE_SIMPLE_TYPE(FslIMX25State, FSL_IMX25)
 
 #define FSL_IMX25_NUM_UARTS 5
 #define FSL_IMX25_NUM_GPTS 4
diff --git a/include/hw/arm/fsl-imx31.h b/include/hw/arm/fsl-imx31.h
index 64b4ca0..b9792d5 100644
--- a/include/hw/arm/fsl-imx31.h
+++ b/include/hw/arm/fsl-imx31.h
@@ -31,9 +31,7 @@
 #include "qom/object.h"
 
 #define TYPE_FSL_IMX31 "fsl,imx31"
-typedef struct FslIMX31State FslIMX31State;
-DECLARE_INSTANCE_CHECKER(FslIMX31State, FSL_IMX31,
-                         TYPE_FSL_IMX31)
+OBJECT_DECLARE_SIMPLE_TYPE(FslIMX31State, FSL_IMX31)
 
 #define FSL_IMX31_NUM_UARTS 2
 #define FSL_IMX31_NUM_EPITS 2
diff --git a/include/hw/arm/fsl-imx6.h b/include/hw/arm/fsl-imx6.h
index 602b9af..29cc425 100644
--- a/include/hw/arm/fsl-imx6.h
+++ b/include/hw/arm/fsl-imx6.h
@@ -37,9 +37,7 @@
 #include "qom/object.h"
 
 #define TYPE_FSL_IMX6 "fsl,imx6"
-typedef struct FslIMX6State FslIMX6State;
-DECLARE_INSTANCE_CHECKER(FslIMX6State, FSL_IMX6,
-                         TYPE_FSL_IMX6)
+OBJECT_DECLARE_SIMPLE_TYPE(FslIMX6State, FSL_IMX6)
 
 #define FSL_IMX6_NUM_CPUS 4
 #define FSL_IMX6_NUM_UARTS 5
diff --git a/include/hw/arm/fsl-imx6ul.h b/include/hw/arm/fsl-imx6ul.h
index e4862fd..f8ebfba 100644
--- a/include/hw/arm/fsl-imx6ul.h
+++ b/include/hw/arm/fsl-imx6ul.h
@@ -41,9 +41,7 @@
 #include "qom/object.h"
 
 #define TYPE_FSL_IMX6UL "fsl,imx6ul"
-typedef struct FslIMX6ULState FslIMX6ULState;
-DECLARE_INSTANCE_CHECKER(FslIMX6ULState, FSL_IMX6UL,
-                         TYPE_FSL_IMX6UL)
+OBJECT_DECLARE_SIMPLE_TYPE(FslIMX6ULState, FSL_IMX6UL)
 
 enum FslIMX6ULConfiguration {
     FSL_IMX6UL_NUM_CPUS         = 1,
diff --git a/include/hw/arm/fsl-imx7.h b/include/hw/arm/fsl-imx7.h
index 434d1d0..161fdc3 100644
--- a/include/hw/arm/fsl-imx7.h
+++ b/include/hw/arm/fsl-imx7.h
@@ -42,9 +42,7 @@
 #include "qom/object.h"
 
 #define TYPE_FSL_IMX7 "fsl,imx7"
-typedef struct FslIMX7State FslIMX7State;
-DECLARE_INSTANCE_CHECKER(FslIMX7State, FSL_IMX7,
-                         TYPE_FSL_IMX7)
+OBJECT_DECLARE_SIMPLE_TYPE(FslIMX7State, FSL_IMX7)
 
 enum FslIMX7Configuration {
     FSL_IMX7_NUM_CPUS         = 2,
diff --git a/include/hw/arm/msf2-soc.h b/include/hw/arm/msf2-soc.h
index 9b93d0d..d406184 100644
--- a/include/hw/arm/msf2-soc.h
+++ b/include/hw/arm/msf2-soc.h
@@ -33,9 +33,7 @@
 #include "qom/object.h"
 
 #define TYPE_MSF2_SOC     "msf2-soc"
-typedef struct MSF2State MSF2State;
-DECLARE_INSTANCE_CHECKER(MSF2State, MSF2_SOC,
-                         TYPE_MSF2_SOC)
+OBJECT_DECLARE_SIMPLE_TYPE(MSF2State, MSF2_SOC)
 
 #define MSF2_NUM_SPIS         2
 #define MSF2_NUM_UARTS        2
diff --git a/include/hw/arm/nrf51_soc.h b/include/hw/arm/nrf51_soc.h
index b69492b..f8a6725 100644
--- a/include/hw/arm/nrf51_soc.h
+++ b/include/hw/arm/nrf51_soc.h
@@ -20,9 +20,7 @@
 #include "qom/object.h"
 
 #define TYPE_NRF51_SOC "nrf51-soc"
-typedef struct NRF51State NRF51State;
-DECLARE_INSTANCE_CHECKER(NRF51State, NRF51_SOC,
-                         TYPE_NRF51_SOC)
+OBJECT_DECLARE_SIMPLE_TYPE(NRF51State, NRF51_SOC)
 
 #define NRF51_NUM_TIMERS 3
 
diff --git a/include/hw/arm/omap.h b/include/hw/arm/omap.h
index 0dbf171..ff6a173 100644
--- a/include/hw/arm/omap.h
+++ b/include/hw/arm/omap.h
@@ -94,9 +94,7 @@
 
 /* omap_i2c.c */
 #define TYPE_OMAP_I2C "omap_i2c"
-typedef struct OMAPI2CState OMAPI2CState;
-DECLARE_INSTANCE_CHECKER(OMAPI2CState, OMAP_I2C,
-                         TYPE_OMAP_I2C)
+OBJECT_DECLARE_SIMPLE_TYPE(OMAPI2CState, OMAP_I2C)
 
 
 /* TODO: clock framework (see above) */
diff --git a/include/hw/arm/pxa.h b/include/hw/arm/pxa.h
index 9046876..1095504 100644
--- a/include/hw/arm/pxa.h
+++ b/include/hw/arm/pxa.h
@@ -88,9 +88,7 @@
 
 /* pxa2xx_mmci.c */
 #define TYPE_PXA2XX_MMCI "pxa2xx-mmci"
-typedef struct PXA2xxMMCIState PXA2xxMMCIState;
-DECLARE_INSTANCE_CHECKER(PXA2xxMMCIState, PXA2XX_MMCI,
-                         TYPE_PXA2XX_MMCI)
+OBJECT_DECLARE_SIMPLE_TYPE(PXA2xxMMCIState, PXA2XX_MMCI)
 
 PXA2xxMMCIState *pxa2xx_mmci_init(MemoryRegion *sysmem,
                 hwaddr base,
@@ -100,9 +98,7 @@
 
 /* pxa2xx_pcmcia.c */
 #define TYPE_PXA2XX_PCMCIA "pxa2xx-pcmcia"
-typedef struct PXA2xxPCMCIAState PXA2xxPCMCIAState;
-DECLARE_INSTANCE_CHECKER(PXA2xxPCMCIAState, PXA2XX_PCMCIA,
-                         TYPE_PXA2XX_PCMCIA)
+OBJECT_DECLARE_SIMPLE_TYPE(PXA2xxPCMCIAState, PXA2XX_PCMCIA)
 
 PXA2xxPCMCIAState *pxa2xx_pcmcia_init(MemoryRegion *sysmem,
                                       hwaddr base);
@@ -130,13 +126,10 @@
 
 #define TYPE_PXA2XX_I2C "pxa2xx_i2c"
 typedef struct PXA2xxI2SState PXA2xxI2SState;
-DECLARE_INSTANCE_CHECKER(PXA2xxI2CState, PXA2XX_I2C,
-                         TYPE_PXA2XX_I2C)
+OBJECT_DECLARE_SIMPLE_TYPE(PXA2xxI2CState, PXA2XX_I2C)
 
 #define TYPE_PXA2XX_FIR "pxa2xx-fir"
-typedef struct PXA2xxFIrState PXA2xxFIrState;
-DECLARE_INSTANCE_CHECKER(PXA2xxFIrState, PXA2XX_FIR,
-                         TYPE_PXA2XX_FIR)
+OBJECT_DECLARE_SIMPLE_TYPE(PXA2xxFIrState, PXA2XX_FIR)
 
 typedef struct {
     ARMCPU *cpu;
diff --git a/include/hw/arm/stm32f205_soc.h b/include/hw/arm/stm32f205_soc.h
index 9c2f481..985ff63 100644
--- a/include/hw/arm/stm32f205_soc.h
+++ b/include/hw/arm/stm32f205_soc.h
@@ -35,9 +35,7 @@
 #include "qom/object.h"
 
 #define TYPE_STM32F205_SOC "stm32f205-soc"
-typedef struct STM32F205State STM32F205State;
-DECLARE_INSTANCE_CHECKER(STM32F205State, STM32F205_SOC,
-                         TYPE_STM32F205_SOC)
+OBJECT_DECLARE_SIMPLE_TYPE(STM32F205State, STM32F205_SOC)
 
 #define STM_NUM_USARTS 6
 #define STM_NUM_TIMERS 4
diff --git a/include/hw/arm/stm32f405_soc.h b/include/hw/arm/stm32f405_soc.h
index f1a2276..347105e 100644
--- a/include/hw/arm/stm32f405_soc.h
+++ b/include/hw/arm/stm32f405_soc.h
@@ -36,9 +36,7 @@
 #include "qom/object.h"
 
 #define TYPE_STM32F405_SOC "stm32f405-soc"
-typedef struct STM32F405State STM32F405State;
-DECLARE_INSTANCE_CHECKER(STM32F405State, STM32F405_SOC,
-                         TYPE_STM32F405_SOC)
+OBJECT_DECLARE_SIMPLE_TYPE(STM32F405State, STM32F405_SOC)
 
 #define STM_NUM_USARTS 7
 #define STM_NUM_TIMERS 4
diff --git a/include/hw/arm/xlnx-versal.h b/include/hw/arm/xlnx-versal.h
index eaa9023..8ce8e63 100644
--- a/include/hw/arm/xlnx-versal.h
+++ b/include/hw/arm/xlnx-versal.h
@@ -23,9 +23,7 @@
 #include "qom/object.h"
 
 #define TYPE_XLNX_VERSAL "xlnx-versal"
-typedef struct Versal Versal;
-DECLARE_INSTANCE_CHECKER(Versal, XLNX_VERSAL,
-                         TYPE_XLNX_VERSAL)
+OBJECT_DECLARE_SIMPLE_TYPE(Versal, XLNX_VERSAL)
 
 #define XLNX_VERSAL_NR_ACPUS   2
 #define XLNX_VERSAL_NR_UARTS   2
diff --git a/include/hw/arm/xlnx-zynqmp.h b/include/hw/arm/xlnx-zynqmp.h
index 4cc97b4..567d0db 100644
--- a/include/hw/arm/xlnx-zynqmp.h
+++ b/include/hw/arm/xlnx-zynqmp.h
@@ -35,9 +35,7 @@
 #include "qom/object.h"
 
 #define TYPE_XLNX_ZYNQMP "xlnx,zynqmp"
-typedef struct XlnxZynqMPState XlnxZynqMPState;
-DECLARE_INSTANCE_CHECKER(XlnxZynqMPState, XLNX_ZYNQMP,
-                         TYPE_XLNX_ZYNQMP)
+OBJECT_DECLARE_SIMPLE_TYPE(XlnxZynqMPState, XLNX_ZYNQMP)
 
 #define XLNX_ZYNQMP_NUM_APU_CPUS 4
 #define XLNX_ZYNQMP_NUM_RPU_CPUS 2
diff --git a/include/hw/block/flash.h b/include/hw/block/flash.h
index 3e26303..7dde0ad 100644
--- a/include/hw/block/flash.h
+++ b/include/hw/block/flash.h
@@ -9,9 +9,7 @@
 /* pflash_cfi01.c */
 
 #define TYPE_PFLASH_CFI01 "cfi.pflash01"
-typedef struct PFlashCFI01 PFlashCFI01;
-DECLARE_INSTANCE_CHECKER(PFlashCFI01, PFLASH_CFI01,
-                         TYPE_PFLASH_CFI01)
+OBJECT_DECLARE_SIMPLE_TYPE(PFlashCFI01, PFLASH_CFI01)
 
 
 PFlashCFI01 *pflash_cfi01_register(hwaddr base,
@@ -30,9 +28,7 @@
 /* pflash_cfi02.c */
 
 #define TYPE_PFLASH_CFI02 "cfi.pflash02"
-typedef struct PFlashCFI02 PFlashCFI02;
-DECLARE_INSTANCE_CHECKER(PFlashCFI02, PFLASH_CFI02,
-                         TYPE_PFLASH_CFI02)
+OBJECT_DECLARE_SIMPLE_TYPE(PFlashCFI02, PFLASH_CFI02)
 
 
 PFlashCFI02 *pflash_cfi02_register(hwaddr base,
diff --git a/include/hw/block/swim.h b/include/hw/block/swim.h
index 8287da7..5a49029 100644
--- a/include/hw/block/swim.h
+++ b/include/hw/block/swim.h
@@ -17,13 +17,10 @@
 
 #define SWIM_MAX_FD            2
 
-typedef struct SWIMDrive SWIMDrive;
-typedef struct SWIMBus SWIMBus;
 typedef struct SWIMCtrl SWIMCtrl;
 
 #define TYPE_SWIM_DRIVE "swim-drive"
-DECLARE_INSTANCE_CHECKER(SWIMDrive, SWIM_DRIVE,
-                         TYPE_SWIM_DRIVE)
+OBJECT_DECLARE_SIMPLE_TYPE(SWIMDrive, SWIM_DRIVE)
 
 struct SWIMDrive {
     DeviceState qdev;
@@ -32,8 +29,7 @@
 };
 
 #define TYPE_SWIM_BUS "swim-bus"
-DECLARE_INSTANCE_CHECKER(SWIMBus, SWIM_BUS,
-                         TYPE_SWIM_BUS)
+OBJECT_DECLARE_SIMPLE_TYPE(SWIMBus, SWIM_BUS)
 
 struct SWIMBus {
     BusState bus;
@@ -70,9 +66,7 @@
 };
 
 #define TYPE_SWIM "swim"
-typedef struct Swim Swim;
-DECLARE_INSTANCE_CHECKER(Swim, SWIM,
-                         TYPE_SWIM)
+OBJECT_DECLARE_SIMPLE_TYPE(Swim, SWIM)
 
 struct Swim {
     SysBusDevice parent_obj;
diff --git a/include/hw/char/avr_usart.h b/include/hw/char/avr_usart.h
index 5202f15..bb57532 100644
--- a/include/hw/char/avr_usart.h
+++ b/include/hw/char/avr_usart.h
@@ -58,9 +58,7 @@
 #define USART_CSRC_CSZ0   (1 << 1)
 
 #define TYPE_AVR_USART "avr-usart"
-typedef struct AVRUsartState AVRUsartState;
-DECLARE_INSTANCE_CHECKER(AVRUsartState, AVR_USART,
-                         TYPE_AVR_USART)
+OBJECT_DECLARE_SIMPLE_TYPE(AVRUsartState, AVR_USART)
 
 struct AVRUsartState {
     /* <private> */
diff --git a/include/hw/char/bcm2835_aux.h b/include/hw/char/bcm2835_aux.h
index a08795c..9e08179 100644
--- a/include/hw/char/bcm2835_aux.h
+++ b/include/hw/char/bcm2835_aux.h
@@ -14,9 +14,7 @@
 #include "qom/object.h"
 
 #define TYPE_BCM2835_AUX "bcm2835-aux"
-typedef struct BCM2835AuxState BCM2835AuxState;
-DECLARE_INSTANCE_CHECKER(BCM2835AuxState, BCM2835_AUX,
-                         TYPE_BCM2835_AUX)
+OBJECT_DECLARE_SIMPLE_TYPE(BCM2835AuxState, BCM2835_AUX)
 
 #define BCM2835_AUX_RX_FIFO_LEN 8
 
diff --git a/include/hw/char/cadence_uart.h b/include/hw/char/cadence_uart.h
index 1734f53..e7f7cd8 100644
--- a/include/hw/char/cadence_uart.h
+++ b/include/hw/char/cadence_uart.h
@@ -32,9 +32,7 @@
 #define CADENCE_UART_R_MAX (0x48/4)
 
 #define TYPE_CADENCE_UART "cadence_uart"
-typedef struct CadenceUARTState CadenceUARTState;
-DECLARE_INSTANCE_CHECKER(CadenceUARTState, CADENCE_UART,
-                         TYPE_CADENCE_UART)
+OBJECT_DECLARE_SIMPLE_TYPE(CadenceUARTState, CADENCE_UART)
 
 struct CadenceUARTState {
     /*< private >*/
diff --git a/include/hw/char/cmsdk-apb-uart.h b/include/hw/char/cmsdk-apb-uart.h
index 2c3869a..9daff0e 100644
--- a/include/hw/char/cmsdk-apb-uart.h
+++ b/include/hw/char/cmsdk-apb-uart.h
@@ -18,9 +18,7 @@
 #include "qom/object.h"
 
 #define TYPE_CMSDK_APB_UART "cmsdk-apb-uart"
-typedef struct CMSDKAPBUART CMSDKAPBUART;
-DECLARE_INSTANCE_CHECKER(CMSDKAPBUART, CMSDK_APB_UART,
-                         TYPE_CMSDK_APB_UART)
+OBJECT_DECLARE_SIMPLE_TYPE(CMSDKAPBUART, CMSDK_APB_UART)
 
 struct CMSDKAPBUART {
     /*< private >*/
diff --git a/include/hw/char/digic-uart.h b/include/hw/char/digic-uart.h
index 01d4068..f710a1a 100644
--- a/include/hw/char/digic-uart.h
+++ b/include/hw/char/digic-uart.h
@@ -23,9 +23,7 @@
 #include "qom/object.h"
 
 #define TYPE_DIGIC_UART "digic-uart"
-typedef struct DigicUartState DigicUartState;
-DECLARE_INSTANCE_CHECKER(DigicUartState, DIGIC_UART,
-                         TYPE_DIGIC_UART)
+OBJECT_DECLARE_SIMPLE_TYPE(DigicUartState, DIGIC_UART)
 
 enum {
     R_TX = 0x00,
diff --git a/include/hw/char/escc.h b/include/hw/char/escc.h
index 5eaec50..7e9482d 100644
--- a/include/hw/char/escc.h
+++ b/include/hw/char/escc.h
@@ -11,9 +11,7 @@
 #define TYPE_ESCC "escc"
 #define ESCC_SIZE 4
 
-typedef struct ESCCState ESCCState;
-DECLARE_INSTANCE_CHECKER(ESCCState, ESCC,
-                         TYPE_ESCC)
+OBJECT_DECLARE_SIMPLE_TYPE(ESCCState, ESCC)
 
 typedef enum {
     escc_chn_a, escc_chn_b,
diff --git a/include/hw/char/ibex_uart.h b/include/hw/char/ibex_uart.h
index 36eb75f..03d19e3 100644
--- a/include/hw/char/ibex_uart.h
+++ b/include/hw/char/ibex_uart.h
@@ -70,9 +70,7 @@
 #define IBEX_UART_CLOCK 50000000 /* 50MHz clock */
 
 #define TYPE_IBEX_UART "ibex-uart"
-typedef struct IbexUartState IbexUartState;
-DECLARE_INSTANCE_CHECKER(IbexUartState, IBEX_UART,
-                         TYPE_IBEX_UART)
+OBJECT_DECLARE_SIMPLE_TYPE(IbexUartState, IBEX_UART)
 
 struct IbexUartState {
     /* <private> */
diff --git a/include/hw/char/imx_serial.h b/include/hw/char/imx_serial.h
index 200f1ec..91c9894 100644
--- a/include/hw/char/imx_serial.h
+++ b/include/hw/char/imx_serial.h
@@ -23,9 +23,7 @@
 #include "qom/object.h"
 
 #define TYPE_IMX_SERIAL "imx.serial"
-typedef struct IMXSerialState IMXSerialState;
-DECLARE_INSTANCE_CHECKER(IMXSerialState, IMX_SERIAL,
-                         TYPE_IMX_SERIAL)
+OBJECT_DECLARE_SIMPLE_TYPE(IMXSerialState, IMX_SERIAL)
 
 #define URXD_CHARRDY    (1<<15)   /* character read is valid */
 #define URXD_ERR        (1<<14)   /* Character has error */
diff --git a/include/hw/char/nrf51_uart.h b/include/hw/char/nrf51_uart.h
index 0cf3c4e..561b638 100644
--- a/include/hw/char/nrf51_uart.h
+++ b/include/hw/char/nrf51_uart.h
@@ -20,9 +20,7 @@
 #define UART_SIZE 0x1000
 
 #define TYPE_NRF51_UART "nrf51_soc.uart"
-typedef struct NRF51UARTState NRF51UARTState;
-DECLARE_INSTANCE_CHECKER(NRF51UARTState, NRF51_UART,
-                         TYPE_NRF51_UART)
+OBJECT_DECLARE_SIMPLE_TYPE(NRF51UARTState, NRF51_UART)
 
 REG32(UART_STARTRX, 0x000)
 REG32(UART_STOPRX, 0x004)
diff --git a/include/hw/char/pl011.h b/include/hw/char/pl011.h
index 80de4ec..a91ea50 100644
--- a/include/hw/char/pl011.h
+++ b/include/hw/char/pl011.h
@@ -22,9 +22,7 @@
 #include "qom/object.h"
 
 #define TYPE_PL011 "pl011"
-typedef struct PL011State PL011State;
-DECLARE_INSTANCE_CHECKER(PL011State, PL011,
-                         TYPE_PL011)
+OBJECT_DECLARE_SIMPLE_TYPE(PL011State, PL011)
 
 /* This shares the same struct (and cast macro) as the base pl011 device */
 #define TYPE_PL011_LUMINARY "pl011_luminary"
diff --git a/include/hw/char/serial.h b/include/hw/char/serial.h
index 264f529..db4f9af 100644
--- a/include/hw/char/serial.h
+++ b/include/hw/char/serial.h
@@ -89,14 +89,12 @@
     uint8_t regshift;
     uint8_t endianness;
 };
-typedef struct SerialMM SerialMM;
 
 struct SerialIO {
     SysBusDevice parent;
 
     SerialState serial;
 };
-typedef struct SerialIO SerialIO;
 
 extern const VMStateDescription vmstate_serial;
 extern const MemoryRegionOps serial_io_ops;
@@ -104,16 +102,13 @@
 void serial_set_frequency(SerialState *s, uint32_t frequency);
 
 #define TYPE_SERIAL "serial"
-DECLARE_INSTANCE_CHECKER(SerialState, SERIAL,
-                         TYPE_SERIAL)
+OBJECT_DECLARE_SIMPLE_TYPE(SerialState, SERIAL)
 
 #define TYPE_SERIAL_MM "serial-mm"
-DECLARE_INSTANCE_CHECKER(SerialMM, SERIAL_MM,
-                         TYPE_SERIAL_MM)
+OBJECT_DECLARE_SIMPLE_TYPE(SerialMM, SERIAL_MM)
 
 #define TYPE_SERIAL_IO "serial-io"
-DECLARE_INSTANCE_CHECKER(SerialIO, SERIAL_IO,
-                         TYPE_SERIAL_IO)
+OBJECT_DECLARE_SIMPLE_TYPE(SerialIO, SERIAL_IO)
 
 SerialMM *serial_mm_init(MemoryRegion *address_space,
                          hwaddr base, int regshift,
diff --git a/include/hw/char/stm32f2xx_usart.h b/include/hw/char/stm32f2xx_usart.h
index 1670c07..65bcc85 100644
--- a/include/hw/char/stm32f2xx_usart.h
+++ b/include/hw/char/stm32f2xx_usart.h
@@ -54,9 +54,7 @@
 #define USART_CR1_RE  (1 << 2)
 
 #define TYPE_STM32F2XX_USART "stm32f2xx-usart"
-typedef struct STM32F2XXUsartState STM32F2XXUsartState;
-DECLARE_INSTANCE_CHECKER(STM32F2XXUsartState, STM32F2XX_USART,
-                         TYPE_STM32F2XX_USART)
+OBJECT_DECLARE_SIMPLE_TYPE(STM32F2XXUsartState, STM32F2XX_USART)
 
 struct STM32F2XXUsartState {
     /* <private> */
diff --git a/include/hw/clock.h b/include/hw/clock.h
index b524509..d357594 100644
--- a/include/hw/clock.h
+++ b/include/hw/clock.h
@@ -18,9 +18,7 @@
 #include "qemu/queue.h"
 
 #define TYPE_CLOCK "clock"
-typedef struct Clock Clock;
-DECLARE_INSTANCE_CHECKER(Clock, CLOCK,
-                         TYPE_CLOCK)
+OBJECT_DECLARE_SIMPLE_TYPE(Clock, CLOCK)
 
 typedef void ClockCallback(void *opaque);
 
diff --git a/include/hw/core/generic-loader.h b/include/hw/core/generic-loader.h
index 8e86532..19d87b3 100644
--- a/include/hw/core/generic-loader.h
+++ b/include/hw/core/generic-loader.h
@@ -40,10 +40,8 @@
     bool data_be;
     bool set_pc;
 };
-typedef struct GenericLoaderState GenericLoaderState;
 
 #define TYPE_GENERIC_LOADER "loader"
-DECLARE_INSTANCE_CHECKER(GenericLoaderState, GENERIC_LOADER,
-                         TYPE_GENERIC_LOADER)
+OBJECT_DECLARE_SIMPLE_TYPE(GenericLoaderState, GENERIC_LOADER)
 
 #endif
diff --git a/include/hw/core/split-irq.h b/include/hw/core/split-irq.h
index 76d42b2..ff8852f 100644
--- a/include/hw/core/split-irq.h
+++ b/include/hw/core/split-irq.h
@@ -42,10 +42,8 @@
 
 #define MAX_SPLIT_LINES 16
 
-typedef struct SplitIRQ SplitIRQ;
 
-DECLARE_INSTANCE_CHECKER(SplitIRQ, SPLIT_IRQ,
-                         TYPE_SPLIT_IRQ)
+OBJECT_DECLARE_SIMPLE_TYPE(SplitIRQ, SPLIT_IRQ)
 
 struct SplitIRQ {
     DeviceState parent_obj;
diff --git a/include/hw/cpu/a15mpcore.h b/include/hw/cpu/a15mpcore.h
index 58d8ac7..75d39e5 100644
--- a/include/hw/cpu/a15mpcore.h
+++ b/include/hw/cpu/a15mpcore.h
@@ -27,9 +27,7 @@
 /* A15MP private memory region.  */
 
 #define TYPE_A15MPCORE_PRIV "a15mpcore_priv"
-typedef struct A15MPPrivState A15MPPrivState;
-DECLARE_INSTANCE_CHECKER(A15MPPrivState, A15MPCORE_PRIV,
-                         TYPE_A15MPCORE_PRIV)
+OBJECT_DECLARE_SIMPLE_TYPE(A15MPPrivState, A15MPCORE_PRIV)
 
 struct A15MPPrivState {
     /*< private >*/
diff --git a/include/hw/cpu/a9mpcore.h b/include/hw/cpu/a9mpcore.h
index 37e5cfc..e0396ab 100644
--- a/include/hw/cpu/a9mpcore.h
+++ b/include/hw/cpu/a9mpcore.h
@@ -18,9 +18,7 @@
 #include "qom/object.h"
 
 #define TYPE_A9MPCORE_PRIV "a9mpcore_priv"
-typedef struct A9MPPrivState A9MPPrivState;
-DECLARE_INSTANCE_CHECKER(A9MPPrivState, A9MPCORE_PRIV,
-                         TYPE_A9MPCORE_PRIV)
+OBJECT_DECLARE_SIMPLE_TYPE(A9MPPrivState, A9MPCORE_PRIV)
 
 struct A9MPPrivState {
     /*< private >*/
diff --git a/include/hw/cpu/arm11mpcore.h b/include/hw/cpu/arm11mpcore.h
index 411d7e6..2cac8c1 100644
--- a/include/hw/cpu/arm11mpcore.h
+++ b/include/hw/cpu/arm11mpcore.h
@@ -17,9 +17,7 @@
 #include "qom/object.h"
 
 #define TYPE_ARM11MPCORE_PRIV "arm11mpcore_priv"
-typedef struct ARM11MPCorePriveState ARM11MPCorePriveState;
-DECLARE_INSTANCE_CHECKER(ARM11MPCorePriveState, ARM11MPCORE_PRIV,
-                         TYPE_ARM11MPCORE_PRIV)
+OBJECT_DECLARE_SIMPLE_TYPE(ARM11MPCorePriveState, ARM11MPCORE_PRIV)
 
 struct ARM11MPCorePriveState {
     SysBusDevice parent_obj;
diff --git a/include/hw/cpu/cluster.h b/include/hw/cpu/cluster.h
index 1c807c5..53fbf36 100644
--- a/include/hw/cpu/cluster.h
+++ b/include/hw/cpu/cluster.h
@@ -55,9 +55,7 @@
  */
 
 #define TYPE_CPU_CLUSTER "cpu-cluster"
-typedef struct CPUClusterState CPUClusterState;
-DECLARE_INSTANCE_CHECKER(CPUClusterState, CPU_CLUSTER,
-                         TYPE_CPU_CLUSTER)
+OBJECT_DECLARE_SIMPLE_TYPE(CPUClusterState, CPU_CLUSTER)
 
 /*
  * This limit is imposed by TCG, which puts the cluster ID into an
diff --git a/include/hw/cpu/core.h b/include/hw/cpu/core.h
index 61ea348..98ab916 100644
--- a/include/hw/cpu/core.h
+++ b/include/hw/cpu/core.h
@@ -14,9 +14,7 @@
 
 #define TYPE_CPU_CORE "cpu-core"
 
-typedef struct CPUCore CPUCore;
-DECLARE_INSTANCE_CHECKER(CPUCore, CPU_CORE,
-                         TYPE_CPU_CORE)
+OBJECT_DECLARE_SIMPLE_TYPE(CPUCore, CPU_CORE)
 
 struct CPUCore {
     /*< private >*/
diff --git a/include/hw/display/bcm2835_fb.h b/include/hw/display/bcm2835_fb.h
index 226d77a..38671af 100644
--- a/include/hw/display/bcm2835_fb.h
+++ b/include/hw/display/bcm2835_fb.h
@@ -17,9 +17,7 @@
 #include "qom/object.h"
 
 #define TYPE_BCM2835_FB "bcm2835-fb"
-typedef struct BCM2835FBState BCM2835FBState;
-DECLARE_INSTANCE_CHECKER(BCM2835FBState, BCM2835_FB,
-                         TYPE_BCM2835_FB)
+OBJECT_DECLARE_SIMPLE_TYPE(BCM2835FBState, BCM2835_FB)
 
 /*
  * Configuration information about the fb which the guest can program
diff --git a/include/hw/display/dpcd.h b/include/hw/display/dpcd.h
index 09304dd..a4e37ab 100644
--- a/include/hw/display/dpcd.h
+++ b/include/hw/display/dpcd.h
@@ -26,11 +26,9 @@
 #define DPCD_H
 #include "qom/object.h"
 
-typedef struct DPCDState DPCDState;
 
 #define TYPE_DPCD "dpcd"
-DECLARE_INSTANCE_CHECKER(DPCDState, DPCD,
-                         TYPE_DPCD)
+OBJECT_DECLARE_SIMPLE_TYPE(DPCDState, DPCD)
 
 /* DCPD Revision. */
 #define DPCD_REVISION                           0x00
diff --git a/include/hw/display/i2c-ddc.h b/include/hw/display/i2c-ddc.h
index fbabfea..94b5880 100644
--- a/include/hw/display/i2c-ddc.h
+++ b/include/hw/display/i2c-ddc.h
@@ -34,10 +34,8 @@
     uint8_t edid_blob[128];
 };
 
-typedef struct I2CDDCState I2CDDCState;
 
 #define TYPE_I2CDDC "i2c-ddc"
-DECLARE_INSTANCE_CHECKER(I2CDDCState, I2CDDC,
-                         TYPE_I2CDDC)
+OBJECT_DECLARE_SIMPLE_TYPE(I2CDDCState, I2CDDC)
 
 #endif /* I2C_DDC_H */
diff --git a/include/hw/display/macfb.h b/include/hw/display/macfb.h
index 4adfaa7..c133fa2 100644
--- a/include/hw/display/macfb.h
+++ b/include/hw/display/macfb.h
@@ -32,9 +32,7 @@
 } MacfbState;
 
 #define TYPE_MACFB "sysbus-macfb"
-typedef struct MacfbSysBusState MacfbSysBusState;
-DECLARE_INSTANCE_CHECKER(MacfbSysBusState, MACFB,
-                         TYPE_MACFB)
+OBJECT_DECLARE_SIMPLE_TYPE(MacfbSysBusState, MACFB)
 
 struct MacfbSysBusState {
     SysBusDevice busdev;
diff --git a/include/hw/display/xlnx_dp.h b/include/hw/display/xlnx_dp.h
index 3b7d9e5..8ab4733 100644
--- a/include/hw/display/xlnx_dp.h
+++ b/include/hw/display/xlnx_dp.h
@@ -103,10 +103,8 @@
     DPCDState *dpcd;
     I2CDDCState *edid;
 };
-typedef struct XlnxDPState XlnxDPState;
 
 #define TYPE_XLNX_DP "xlnx.v-dp"
-DECLARE_INSTANCE_CHECKER(XlnxDPState, XLNX_DP,
-                         TYPE_XLNX_DP)
+OBJECT_DECLARE_SIMPLE_TYPE(XlnxDPState, XLNX_DP)
 
 #endif
diff --git a/include/hw/dma/bcm2835_dma.h b/include/hw/dma/bcm2835_dma.h
index b94dae7..1d26b1d 100644
--- a/include/hw/dma/bcm2835_dma.h
+++ b/include/hw/dma/bcm2835_dma.h
@@ -26,9 +26,7 @@
 } BCM2835DMAChan;
 
 #define TYPE_BCM2835_DMA "bcm2835-dma"
-typedef struct BCM2835DMAState BCM2835DMAState;
-DECLARE_INSTANCE_CHECKER(BCM2835DMAState, BCM2835_DMA,
-                         TYPE_BCM2835_DMA)
+OBJECT_DECLARE_SIMPLE_TYPE(BCM2835DMAState, BCM2835_DMA)
 
 #define BCM2835_DMA_NCHANS 16
 
diff --git a/include/hw/dma/i8257.h b/include/hw/dma/i8257.h
index 362ce7b..f652345 100644
--- a/include/hw/dma/i8257.h
+++ b/include/hw/dma/i8257.h
@@ -6,9 +6,7 @@
 #include "qom/object.h"
 
 #define TYPE_I8257 "i8257"
-typedef struct I8257State I8257State;
-DECLARE_INSTANCE_CHECKER(I8257State, I8257,
-                         TYPE_I8257)
+OBJECT_DECLARE_SIMPLE_TYPE(I8257State, I8257)
 
 typedef struct I8257Regs {
     int now[2];
diff --git a/include/hw/dma/pl080.h b/include/hw/dma/pl080.h
index e9669bf..1883f04 100644
--- a/include/hw/dma/pl080.h
+++ b/include/hw/dma/pl080.h
@@ -43,9 +43,7 @@
 
 #define TYPE_PL080 "pl080"
 #define TYPE_PL081 "pl081"
-typedef struct PL080State PL080State;
-DECLARE_INSTANCE_CHECKER(PL080State, PL080,
-                         TYPE_PL080)
+OBJECT_DECLARE_SIMPLE_TYPE(PL080State, PL080)
 
 struct PL080State {
     SysBusDevice parent_obj;
diff --git a/include/hw/dma/xlnx-zdma.h b/include/hw/dma/xlnx-zdma.h
index f638abe..6602e7f 100644
--- a/include/hw/dma/xlnx-zdma.h
+++ b/include/hw/dma/xlnx-zdma.h
@@ -76,11 +76,9 @@
        to model write only mode.  */
     uint8_t buf[2048];
 };
-typedef struct XlnxZDMA XlnxZDMA;
 
 #define TYPE_XLNX_ZDMA "xlnx.zdma"
 
-DECLARE_INSTANCE_CHECKER(XlnxZDMA, XLNX_ZDMA,
-                         TYPE_XLNX_ZDMA)
+OBJECT_DECLARE_SIMPLE_TYPE(XlnxZDMA, XLNX_ZDMA)
 
 #endif /* XLNX_ZDMA_H */
diff --git a/include/hw/dma/xlnx-zynq-devcfg.h b/include/hw/dma/xlnx-zynq-devcfg.h
index e16b08f..e4cf085 100644
--- a/include/hw/dma/xlnx-zynq-devcfg.h
+++ b/include/hw/dma/xlnx-zynq-devcfg.h
@@ -33,9 +33,7 @@
 
 #define TYPE_XLNX_ZYNQ_DEVCFG "xlnx.ps7-dev-cfg"
 
-typedef struct XlnxZynqDevcfg XlnxZynqDevcfg;
-DECLARE_INSTANCE_CHECKER(XlnxZynqDevcfg, XLNX_ZYNQ_DEVCFG,
-                         TYPE_XLNX_ZYNQ_DEVCFG)
+OBJECT_DECLARE_SIMPLE_TYPE(XlnxZynqDevcfg, XLNX_ZYNQ_DEVCFG)
 
 #define XLNX_ZYNQ_DEVCFG_R_MAX (0x100 / 4)
 
diff --git a/include/hw/dma/xlnx_dpdma.h b/include/hw/dma/xlnx_dpdma.h
index 94b01ca..40537a8 100644
--- a/include/hw/dma/xlnx_dpdma.h
+++ b/include/hw/dma/xlnx_dpdma.h
@@ -43,11 +43,9 @@
     qemu_irq irq;
 };
 
-typedef struct XlnxDPDMAState XlnxDPDMAState;
 
 #define TYPE_XLNX_DPDMA "xlnx.dpdma"
-DECLARE_INSTANCE_CHECKER(XlnxDPDMAState, XLNX_DPDMA,
-                         TYPE_XLNX_DPDMA)
+OBJECT_DECLARE_SIMPLE_TYPE(XlnxDPDMAState, XLNX_DPDMA)
 
 /*
  * xlnx_dpdma_start_operation: Start the operation on the specified channel. The
diff --git a/include/hw/gpio/bcm2835_gpio.h b/include/hw/gpio/bcm2835_gpio.h
index e06e08a..1c53a05 100644
--- a/include/hw/gpio/bcm2835_gpio.h
+++ b/include/hw/gpio/bcm2835_gpio.h
@@ -33,10 +33,8 @@
     uint8_t sd_fsel;
     qemu_irq out[54];
 };
-typedef struct BCM2835GpioState BCM2835GpioState;
 
 #define TYPE_BCM2835_GPIO "bcm2835_gpio"
-DECLARE_INSTANCE_CHECKER(BCM2835GpioState, BCM2835_GPIO,
-                         TYPE_BCM2835_GPIO)
+OBJECT_DECLARE_SIMPLE_TYPE(BCM2835GpioState, BCM2835_GPIO)
 
 #endif
diff --git a/include/hw/gpio/imx_gpio.h b/include/hw/gpio/imx_gpio.h
index a72b272..227860b 100644
--- a/include/hw/gpio/imx_gpio.h
+++ b/include/hw/gpio/imx_gpio.h
@@ -24,9 +24,7 @@
 #include "qom/object.h"
 
 #define TYPE_IMX_GPIO "imx.gpio"
-typedef struct IMXGPIOState IMXGPIOState;
-DECLARE_INSTANCE_CHECKER(IMXGPIOState, IMX_GPIO,
-                         TYPE_IMX_GPIO)
+OBJECT_DECLARE_SIMPLE_TYPE(IMXGPIOState, IMX_GPIO)
 
 #define IMX_GPIO_MEM_SIZE 0x20
 
diff --git a/include/hw/gpio/nrf51_gpio.h b/include/hw/gpio/nrf51_gpio.h
index 55d7d24..8f9c2f8 100644
--- a/include/hw/gpio/nrf51_gpio.h
+++ b/include/hw/gpio/nrf51_gpio.h
@@ -29,9 +29,7 @@
 #include "hw/sysbus.h"
 #include "qom/object.h"
 #define TYPE_NRF51_GPIO "nrf51_soc.gpio"
-typedef struct NRF51GPIOState NRF51GPIOState;
-DECLARE_INSTANCE_CHECKER(NRF51GPIOState, NRF51_GPIO,
-                         TYPE_NRF51_GPIO)
+OBJECT_DECLARE_SIMPLE_TYPE(NRF51GPIOState, NRF51_GPIO)
 
 #define NRF51_GPIO_PINS 32
 
diff --git a/include/hw/hyperv/vmbus-bridge.h b/include/hw/hyperv/vmbus-bridge.h
index 1324873..1e54195 100644
--- a/include/hw/hyperv/vmbus-bridge.h
+++ b/include/hw/hyperv/vmbus-bridge.h
@@ -23,10 +23,8 @@
 
     VMBus *bus;
 };
-typedef struct VMBusBridge VMBusBridge;
 
-DECLARE_INSTANCE_CHECKER(VMBusBridge, VMBUS_BRIDGE,
-                         TYPE_VMBUS_BRIDGE)
+OBJECT_DECLARE_SIMPLE_TYPE(VMBusBridge, VMBUS_BRIDGE)
 
 static inline VMBusBridge *vmbus_bridge_find(void)
 {
diff --git a/include/hw/hyperv/vmbus.h b/include/hw/hyperv/vmbus.h
index 6e9d1c1..f98bea3 100644
--- a/include/hw/hyperv/vmbus.h
+++ b/include/hw/hyperv/vmbus.h
@@ -24,9 +24,7 @@
                     VMBUS_DEVICE)
 
 #define TYPE_VMBUS "vmbus"
-typedef struct VMBus VMBus;
-DECLARE_INSTANCE_CHECKER(VMBus, VMBUS,
-                         TYPE_VMBUS)
+OBJECT_DECLARE_SIMPLE_TYPE(VMBus, VMBUS)
 
 /*
  * Object wrapping a GPADL -- GPA Descriptor List -- an array of guest physical
diff --git a/include/hw/i2c/i2c.h b/include/hw/i2c/i2c.h
index 17e5743..277dd9f 100644
--- a/include/hw/i2c/i2c.h
+++ b/include/hw/i2c/i2c.h
@@ -49,8 +49,7 @@
 };
 
 #define TYPE_I2C_BUS "i2c-bus"
-DECLARE_INSTANCE_CHECKER(I2CBus, I2C_BUS,
-                         TYPE_I2C_BUS)
+OBJECT_DECLARE_SIMPLE_TYPE(I2CBus, I2C_BUS)
 
 typedef struct I2CNode I2CNode;
 
diff --git a/include/hw/i2c/imx_i2c.h b/include/hw/i2c/imx_i2c.h
index e7f0910..e4f9133 100644
--- a/include/hw/i2c/imx_i2c.h
+++ b/include/hw/i2c/imx_i2c.h
@@ -25,9 +25,7 @@
 #include "qom/object.h"
 
 #define TYPE_IMX_I2C "imx.i2c"
-typedef struct IMXI2CState IMXI2CState;
-DECLARE_INSTANCE_CHECKER(IMXI2CState, IMX_I2C,
-                         TYPE_IMX_I2C)
+OBJECT_DECLARE_SIMPLE_TYPE(IMXI2CState, IMX_I2C)
 
 #define IMX_I2C_MEM_SIZE           0x14
 
diff --git a/include/hw/i2c/microbit_i2c.h b/include/hw/i2c/microbit_i2c.h
index 69d7028..3c29e09 100644
--- a/include/hw/i2c/microbit_i2c.h
+++ b/include/hw/i2c/microbit_i2c.h
@@ -27,9 +27,7 @@
 #define NRF51_TWI_REG_ADDRESS 0x588
 
 #define TYPE_MICROBIT_I2C "microbit.i2c"
-typedef struct MicrobitI2CState MicrobitI2CState;
-DECLARE_INSTANCE_CHECKER(MicrobitI2CState, MICROBIT_I2C,
-                         TYPE_MICROBIT_I2C)
+OBJECT_DECLARE_SIMPLE_TYPE(MicrobitI2CState, MICROBIT_I2C)
 
 #define MICROBIT_I2C_NREGS (NRF51_PERIPHERAL_SIZE / sizeof(uint32_t))
 
diff --git a/include/hw/i2c/ppc4xx_i2c.h b/include/hw/i2c/ppc4xx_i2c.h
index 7cbcdaf..4e882fa 100644
--- a/include/hw/i2c/ppc4xx_i2c.h
+++ b/include/hw/i2c/ppc4xx_i2c.h
@@ -32,9 +32,7 @@
 #include "qom/object.h"
 
 #define TYPE_PPC4xx_I2C "ppc4xx-i2c"
-typedef struct PPC4xxI2CState PPC4xxI2CState;
-DECLARE_INSTANCE_CHECKER(PPC4xxI2CState, PPC4xx_I2C,
-                         TYPE_PPC4xx_I2C)
+OBJECT_DECLARE_SIMPLE_TYPE(PPC4xxI2CState, PPC4xx_I2C)
 
 struct PPC4xxI2CState {
     /*< private >*/
diff --git a/include/hw/i386/ich9.h b/include/hw/i386/ich9.h
index e750d67..48b442b 100644
--- a/include/hw/i386/ich9.h
+++ b/include/hw/i386/ich9.h
@@ -24,9 +24,7 @@
 #define ICH9_CC_SIZE (16 * 1024) /* 16KB. Chipset configuration registers */
 
 #define TYPE_ICH9_LPC_DEVICE "ICH9-LPC"
-typedef struct ICH9LPCState ICH9LPCState;
-DECLARE_INSTANCE_CHECKER(ICH9LPCState, ICH9_LPC_DEVICE,
-                         TYPE_ICH9_LPC_DEVICE)
+OBJECT_DECLARE_SIMPLE_TYPE(ICH9LPCState, ICH9_LPC_DEVICE)
 
 struct ICH9LPCState {
     /* ICH9 LPC PCI to ISA bridge */
diff --git a/include/hw/i386/intel_iommu.h b/include/hw/i386/intel_iommu.h
index 98cfc77..41783ee 100644
--- a/include/hw/i386/intel_iommu.h
+++ b/include/hw/i386/intel_iommu.h
@@ -27,9 +27,7 @@
 #include "qom/object.h"
 
 #define TYPE_INTEL_IOMMU_DEVICE "intel-iommu"
-typedef struct IntelIOMMUState IntelIOMMUState;
-DECLARE_INSTANCE_CHECKER(IntelIOMMUState, INTEL_IOMMU_DEVICE,
-                         TYPE_INTEL_IOMMU_DEVICE)
+OBJECT_DECLARE_SIMPLE_TYPE(IntelIOMMUState, INTEL_IOMMU_DEVICE)
 
 #define TYPE_INTEL_IOMMU_MEMORY_REGION "intel-iommu-iommu-memory-region"
 
diff --git a/include/hw/ide/ahci.h b/include/hw/ide/ahci.h
index da3cddc..b1bdf64 100644
--- a/include/hw/ide/ahci.h
+++ b/include/hw/ide/ahci.h
@@ -51,19 +51,15 @@
     AddressSpace *as;
 } AHCIState;
 
-typedef struct AHCIPCIState AHCIPCIState;
 
 #define TYPE_ICH9_AHCI "ich9-ahci"
-DECLARE_INSTANCE_CHECKER(AHCIPCIState, ICH9_AHCI,
-                         TYPE_ICH9_AHCI)
+OBJECT_DECLARE_SIMPLE_TYPE(AHCIPCIState, ICH9_AHCI)
 
 int32_t ahci_get_num_ports(PCIDevice *dev);
 void ahci_ide_create_devs(PCIDevice *dev, DriveInfo **hd);
 
 #define TYPE_SYSBUS_AHCI "sysbus-ahci"
-typedef struct SysbusAHCIState SysbusAHCIState;
-DECLARE_INSTANCE_CHECKER(SysbusAHCIState, SYSBUS_AHCI,
-                         TYPE_SYSBUS_AHCI)
+OBJECT_DECLARE_SIMPLE_TYPE(SysbusAHCIState, SYSBUS_AHCI)
 
 struct SysbusAHCIState {
     /*< private >*/
@@ -75,9 +71,7 @@
 };
 
 #define TYPE_ALLWINNER_AHCI "allwinner-ahci"
-typedef struct AllwinnerAHCIState AllwinnerAHCIState;
-DECLARE_INSTANCE_CHECKER(AllwinnerAHCIState, ALLWINNER_AHCI,
-                         TYPE_ALLWINNER_AHCI)
+OBJECT_DECLARE_SIMPLE_TYPE(AllwinnerAHCIState, ALLWINNER_AHCI)
 
 #define ALLWINNER_AHCI_MMIO_OFF  0x80
 #define ALLWINNER_AHCI_MMIO_SIZE 0x80
diff --git a/include/hw/ide/internal.h b/include/hw/ide/internal.h
index 77c9372..8a95ad8 100644
--- a/include/hw/ide/internal.h
+++ b/include/hw/ide/internal.h
@@ -19,15 +19,13 @@
 #define USE_DMA_CDROM
 #include "qom/object.h"
 
-typedef struct IDEBus IDEBus;
 typedef struct IDEDevice IDEDevice;
 typedef struct IDEState IDEState;
 typedef struct IDEDMA IDEDMA;
 typedef struct IDEDMAOps IDEDMAOps;
 
 #define TYPE_IDE_BUS "IDE"
-DECLARE_INSTANCE_CHECKER(IDEBus, IDE_BUS,
-                         TYPE_IDE_BUS)
+OBJECT_DECLARE_SIMPLE_TYPE(IDEBus, IDE_BUS)
 
 #define MAX_IDE_DEVS 2
 
diff --git a/include/hw/ide/pci.h b/include/hw/ide/pci.h
index b8d7270..d8384e1 100644
--- a/include/hw/ide/pci.h
+++ b/include/hw/ide/pci.h
@@ -40,9 +40,7 @@
 } BMDMAState;
 
 #define TYPE_PCI_IDE "pci-ide"
-typedef struct PCIIDEState PCIIDEState;
-DECLARE_INSTANCE_CHECKER(PCIIDEState, PCI_IDE,
-                         TYPE_PCI_IDE)
+OBJECT_DECLARE_SIMPLE_TYPE(PCIIDEState, PCI_IDE)
 
 struct PCIIDEState {
     /*< private >*/
diff --git a/include/hw/input/adb.h b/include/hw/input/adb.h
index 3d1c2f4..20fced1 100644
--- a/include/hw/input/adb.h
+++ b/include/hw/input/adb.h
@@ -33,7 +33,6 @@
 
 #define ADB_MAX_OUT_LEN 16
 
-typedef struct ADBBusState ADBBusState;
 typedef struct ADBDevice ADBDevice;
 
 /* buf = NULL means polling */
@@ -65,8 +64,7 @@
 };
 
 #define TYPE_ADB_BUS "apple-desktop-bus"
-DECLARE_INSTANCE_CHECKER(ADBBusState, ADB_BUS,
-                         TYPE_ADB_BUS)
+OBJECT_DECLARE_SIMPLE_TYPE(ADBBusState, ADB_BUS)
 
 #define ADB_STATUS_BUSTIMEOUT  0x1
 #define ADB_STATUS_POLLREPLY   0x2
diff --git a/include/hw/input/i8042.h b/include/hw/input/i8042.h
index f8a3bf8..1d90432 100644
--- a/include/hw/input/i8042.h
+++ b/include/hw/input/i8042.h
@@ -12,9 +12,7 @@
 #include "qom/object.h"
 
 #define TYPE_I8042 "i8042"
-typedef struct ISAKBDState ISAKBDState;
-DECLARE_INSTANCE_CHECKER(ISAKBDState, I8042,
-                         TYPE_I8042)
+OBJECT_DECLARE_SIMPLE_TYPE(ISAKBDState, I8042)
 
 #define I8042_A20_LINE "a20"
 
diff --git a/include/hw/intc/allwinner-a10-pic.h b/include/hw/intc/allwinner-a10-pic.h
index 4d71994..b8364d3 100644
--- a/include/hw/intc/allwinner-a10-pic.h
+++ b/include/hw/intc/allwinner-a10-pic.h
@@ -5,9 +5,7 @@
 #include "qom/object.h"
 
 #define TYPE_AW_A10_PIC  "allwinner-a10-pic"
-typedef struct AwA10PICState AwA10PICState;
-DECLARE_INSTANCE_CHECKER(AwA10PICState, AW_A10_PIC,
-                         TYPE_AW_A10_PIC)
+OBJECT_DECLARE_SIMPLE_TYPE(AwA10PICState, AW_A10_PIC)
 
 #define AW_A10_PIC_VECTOR       0
 #define AW_A10_PIC_BASE_ADDR    4
diff --git a/include/hw/intc/aspeed_vic.h b/include/hw/intc/aspeed_vic.h
index 8f2e67d..68d6ab9 100644
--- a/include/hw/intc/aspeed_vic.h
+++ b/include/hw/intc/aspeed_vic.h
@@ -17,9 +17,7 @@
 #include "qom/object.h"
 
 #define TYPE_ASPEED_VIC "aspeed.vic"
-typedef struct AspeedVICState AspeedVICState;
-DECLARE_INSTANCE_CHECKER(AspeedVICState, ASPEED_VIC,
-                         TYPE_ASPEED_VIC)
+OBJECT_DECLARE_SIMPLE_TYPE(AspeedVICState, ASPEED_VIC)
 
 #define ASPEED_VIC_NR_IRQS 51
 
diff --git a/include/hw/intc/bcm2835_ic.h b/include/hw/intc/bcm2835_ic.h
index fd4a767..588eb76 100644
--- a/include/hw/intc/bcm2835_ic.h
+++ b/include/hw/intc/bcm2835_ic.h
@@ -12,9 +12,7 @@
 #include "qom/object.h"
 
 #define TYPE_BCM2835_IC "bcm2835-ic"
-typedef struct BCM2835ICState BCM2835ICState;
-DECLARE_INSTANCE_CHECKER(BCM2835ICState, BCM2835_IC,
-                         TYPE_BCM2835_IC)
+OBJECT_DECLARE_SIMPLE_TYPE(BCM2835ICState, BCM2835_IC)
 
 #define BCM2835_IC_GPU_IRQ "gpu-irq"
 #define BCM2835_IC_ARM_IRQ "arm-irq"
diff --git a/include/hw/intc/bcm2836_control.h b/include/hw/intc/bcm2836_control.h
index f232927..a410c81 100644
--- a/include/hw/intc/bcm2836_control.h
+++ b/include/hw/intc/bcm2836_control.h
@@ -24,9 +24,7 @@
 #define BCM2836_MBPERCORE 4
 
 #define TYPE_BCM2836_CONTROL "bcm2836-control"
-typedef struct BCM2836ControlState BCM2836ControlState;
-DECLARE_INSTANCE_CHECKER(BCM2836ControlState, BCM2836_CONTROL,
-                         TYPE_BCM2836_CONTROL)
+OBJECT_DECLARE_SIMPLE_TYPE(BCM2836ControlState, BCM2836_CONTROL)
 
 struct BCM2836ControlState {
     /*< private >*/
diff --git a/include/hw/intc/heathrow_pic.h b/include/hw/intc/heathrow_pic.h
index f8c9bc2..c0a7f6f 100644
--- a/include/hw/intc/heathrow_pic.h
+++ b/include/hw/intc/heathrow_pic.h
@@ -30,9 +30,7 @@
 #include "qom/object.h"
 
 #define TYPE_HEATHROW "heathrow"
-typedef struct HeathrowState HeathrowState;
-DECLARE_INSTANCE_CHECKER(HeathrowState, HEATHROW,
-                         TYPE_HEATHROW)
+OBJECT_DECLARE_SIMPLE_TYPE(HeathrowState, HEATHROW)
 
 typedef struct HeathrowPICState {
     uint32_t events;
diff --git a/include/hw/intc/ibex_plic.h b/include/hw/intc/ibex_plic.h
index 8da6b03..37f0335 100644
--- a/include/hw/intc/ibex_plic.h
+++ b/include/hw/intc/ibex_plic.h
@@ -23,9 +23,7 @@
 #include "qom/object.h"
 
 #define TYPE_IBEX_PLIC "ibex-plic"
-typedef struct IbexPlicState IbexPlicState;
-DECLARE_INSTANCE_CHECKER(IbexPlicState, IBEX_PLIC,
-                         TYPE_IBEX_PLIC)
+OBJECT_DECLARE_SIMPLE_TYPE(IbexPlicState, IBEX_PLIC)
 
 struct IbexPlicState {
     /*< private >*/
diff --git a/include/hw/intc/imx_avic.h b/include/hw/intc/imx_avic.h
index 6217425..75fbd1a 100644
--- a/include/hw/intc/imx_avic.h
+++ b/include/hw/intc/imx_avic.h
@@ -21,9 +21,7 @@
 #include "qom/object.h"
 
 #define TYPE_IMX_AVIC "imx.avic"
-typedef struct IMXAVICState IMXAVICState;
-DECLARE_INSTANCE_CHECKER(IMXAVICState, IMX_AVIC,
-                         TYPE_IMX_AVIC)
+OBJECT_DECLARE_SIMPLE_TYPE(IMXAVICState, IMX_AVIC)
 
 #define IMX_AVIC_NUM_IRQS 64
 
diff --git a/include/hw/intc/imx_gpcv2.h b/include/hw/intc/imx_gpcv2.h
index 2d8075e..7bdee7e 100644
--- a/include/hw/intc/imx_gpcv2.h
+++ b/include/hw/intc/imx_gpcv2.h
@@ -16,10 +16,8 @@
     MemoryRegion iomem;
     uint32_t     regs[GPC_NUM];
 };
-typedef struct IMXGPCv2State IMXGPCv2State;
 
 #define TYPE_IMX_GPCV2 "imx-gpcv2"
-DECLARE_INSTANCE_CHECKER(IMXGPCv2State, IMX_GPCV2,
-                         TYPE_IMX_GPCV2)
+OBJECT_DECLARE_SIMPLE_TYPE(IMXGPCv2State, IMX_GPCV2)
 
 #endif /* IMX_GPCV2_H */
diff --git a/include/hw/intc/mips_gic.h b/include/hw/intc/mips_gic.h
index 65aa3a9..eeb136e 100644
--- a/include/hw/intc/mips_gic.h
+++ b/include/hw/intc/mips_gic.h
@@ -171,9 +171,7 @@
 #define GIC_LOCAL_INT_WD        0 /* GIC watchdog */
 
 #define TYPE_MIPS_GIC "mips-gic"
-typedef struct MIPSGICState MIPSGICState;
-DECLARE_INSTANCE_CHECKER(MIPSGICState, MIPS_GIC,
-                         TYPE_MIPS_GIC)
+OBJECT_DECLARE_SIMPLE_TYPE(MIPSGICState, MIPS_GIC)
 
 /* Support up to 32 VPs and 256 IRQs */
 #define GIC_MAX_VPS             32
diff --git a/include/hw/intc/realview_gic.h b/include/hw/intc/realview_gic.h
index a93ace8..f37339d 100644
--- a/include/hw/intc/realview_gic.h
+++ b/include/hw/intc/realview_gic.h
@@ -15,9 +15,7 @@
 #include "qom/object.h"
 
 #define TYPE_REALVIEW_GIC "realview_gic"
-typedef struct RealViewGICState RealViewGICState;
-DECLARE_INSTANCE_CHECKER(RealViewGICState, REALVIEW_GIC,
-                         TYPE_REALVIEW_GIC)
+OBJECT_DECLARE_SIMPLE_TYPE(RealViewGICState, REALVIEW_GIC)
 
 struct RealViewGICState {
     SysBusDevice parent_obj;
diff --git a/include/hw/intc/rx_icu.h b/include/hw/intc/rx_icu.h
index ec02df3..7f5889b 100644
--- a/include/hw/intc/rx_icu.h
+++ b/include/hw/intc/rx_icu.h
@@ -69,10 +69,8 @@
     qemu_irq _fir;
     qemu_irq _swi;
 };
-typedef struct RXICUState RXICUState;
 
 #define TYPE_RX_ICU "rx-icu"
-DECLARE_INSTANCE_CHECKER(RXICUState, RX_ICU,
-                         TYPE_RX_ICU)
+OBJECT_DECLARE_SIMPLE_TYPE(RXICUState, RX_ICU)
 
 #endif /* RX_ICU_H */
diff --git a/include/hw/intc/xlnx-pmu-iomod-intc.h b/include/hw/intc/xlnx-pmu-iomod-intc.h
index 7a560e9..ccc8bd2 100644
--- a/include/hw/intc/xlnx-pmu-iomod-intc.h
+++ b/include/hw/intc/xlnx-pmu-iomod-intc.h
@@ -31,9 +31,7 @@
 
 #define TYPE_XLNX_PMU_IO_INTC "xlnx.pmu_io_intc"
 
-typedef struct XlnxPMUIOIntc XlnxPMUIOIntc;
-DECLARE_INSTANCE_CHECKER(XlnxPMUIOIntc, XLNX_PMU_IO_INTC,
-                         TYPE_XLNX_PMU_IO_INTC)
+OBJECT_DECLARE_SIMPLE_TYPE(XlnxPMUIOIntc, XLNX_PMU_IO_INTC)
 
 /* This is R_PIT3_CONTROL + 1 */
 #define XLNXPMUIOINTC_R_MAX (0x78 + 1)
diff --git a/include/hw/intc/xlnx-zynqmp-ipi.h b/include/hw/intc/xlnx-zynqmp-ipi.h
index 29c48db..33eff1d 100644
--- a/include/hw/intc/xlnx-zynqmp-ipi.h
+++ b/include/hw/intc/xlnx-zynqmp-ipi.h
@@ -31,9 +31,7 @@
 
 #define TYPE_XLNX_ZYNQMP_IPI "xlnx.zynqmp_ipi"
 
-typedef struct XlnxZynqMPIPI XlnxZynqMPIPI;
-DECLARE_INSTANCE_CHECKER(XlnxZynqMPIPI, XLNX_ZYNQMP_IPI,
-                         TYPE_XLNX_ZYNQMP_IPI)
+OBJECT_DECLARE_SIMPLE_TYPE(XlnxZynqMPIPI, XLNX_ZYNQMP_IPI)
 
 /* This is R_IPI_IDR + 1 */
 #define R_XLNX_ZYNQMP_IPI_MAX ((0x1c / 4) + 1)
diff --git a/include/hw/ipack/ipack.h b/include/hw/ipack/ipack.h
index 58c611a..75014e7 100644
--- a/include/hw/ipack/ipack.h
+++ b/include/hw/ipack/ipack.h
@@ -14,11 +14,9 @@
 #include "hw/qdev-core.h"
 #include "qom/object.h"
 
-typedef struct IPackBus IPackBus;
 
 #define TYPE_IPACK_BUS "IndustryPack"
-DECLARE_INSTANCE_CHECKER(IPackBus, IPACK_BUS,
-                         TYPE_IPACK_BUS)
+OBJECT_DECLARE_SIMPLE_TYPE(IPackBus, IPACK_BUS)
 
 struct IPackBus {
     /*< private >*/
diff --git a/include/hw/ipmi/ipmi.h b/include/hw/ipmi/ipmi.h
index 5290dab..77a7213 100644
--- a/include/hw/ipmi/ipmi.h
+++ b/include/hw/ipmi/ipmi.h
@@ -264,9 +264,7 @@
 void ipmi_bmc_gen_event(IPMIBmc *b, uint8_t *evt, bool log);
 
 #define TYPE_IPMI_BMC_SIMULATOR "ipmi-bmc-sim"
-typedef struct IPMIBmcSim IPMIBmcSim;
-DECLARE_INSTANCE_CHECKER(IPMIBmcSim, IPMI_BMC_SIMULATOR,
-                         TYPE_IPMI_BMC_SIMULATOR)
+OBJECT_DECLARE_SIMPLE_TYPE(IPMIBmcSim, IPMI_BMC_SIMULATOR)
 
 
 typedef struct RspBuffer {
diff --git a/include/hw/isa/isa.h b/include/hw/isa/isa.h
index 5f7943f..ddaae89 100644
--- a/include/hw/isa/isa.h
+++ b/include/hw/isa/isa.h
@@ -14,8 +14,7 @@
 OBJECT_DECLARE_TYPE(ISADevice, ISADeviceClass, ISA_DEVICE)
 
 #define TYPE_ISA_BUS "ISA"
-DECLARE_INSTANCE_CHECKER(ISABus, ISA_BUS,
-                         TYPE_ISA_BUS)
+OBJECT_DECLARE_SIMPLE_TYPE(ISABus, ISA_BUS)
 
 #define TYPE_APPLE_SMC "isa-applesmc"
 #define APPLESMC_MAX_DATA_LENGTH       32
diff --git a/include/hw/isa/pc87312.h b/include/hw/isa/pc87312.h
index da8dc5d..edaf723 100644
--- a/include/hw/isa/pc87312.h
+++ b/include/hw/isa/pc87312.h
@@ -30,9 +30,7 @@
 
 
 #define TYPE_PC87312 "pc87312"
-typedef struct PC87312State PC87312State;
-DECLARE_INSTANCE_CHECKER(PC87312State, PC87312,
-                         TYPE_PC87312)
+OBJECT_DECLARE_SIMPLE_TYPE(PC87312State, PC87312)
 
 struct PC87312State {
     /*< private >*/
diff --git a/include/hw/m68k/mcf_fec.h b/include/hw/m68k/mcf_fec.h
index 840c5bb..80d4f65 100644
--- a/include/hw/m68k/mcf_fec.h
+++ b/include/hw/m68k/mcf_fec.h
@@ -12,9 +12,7 @@
 #include "qom/object.h"
 
 #define TYPE_MCF_FEC_NET "mcf-fec"
-typedef struct mcf_fec_state mcf_fec_state;
-DECLARE_INSTANCE_CHECKER(mcf_fec_state, MCF_FEC_NET,
-                         TYPE_MCF_FEC_NET)
+OBJECT_DECLARE_SIMPLE_TYPE(mcf_fec_state, MCF_FEC_NET)
 
 #define FEC_NUM_IRQ 13
 
diff --git a/include/hw/mips/cps.h b/include/hw/mips/cps.h
index 849e640..9e35a88 100644
--- a/include/hw/mips/cps.h
+++ b/include/hw/mips/cps.h
@@ -29,9 +29,7 @@
 #include "qom/object.h"
 
 #define TYPE_MIPS_CPS "mips-cps"
-typedef struct MIPSCPSState MIPSCPSState;
-DECLARE_INSTANCE_CHECKER(MIPSCPSState, MIPS_CPS,
-                         TYPE_MIPS_CPS)
+OBJECT_DECLARE_SIMPLE_TYPE(MIPSCPSState, MIPS_CPS)
 
 struct MIPSCPSState {
     SysBusDevice parent_obj;
diff --git a/include/hw/misc/a9scu.h b/include/hw/misc/a9scu.h
index fd1b92e..c3759fb 100644
--- a/include/hw/misc/a9scu.h
+++ b/include/hw/misc/a9scu.h
@@ -25,10 +25,8 @@
     uint32_t status;
     uint32_t num_cpu;
 };
-typedef struct A9SCUState A9SCUState;
 
 #define TYPE_A9_SCU "a9-scu"
-DECLARE_INSTANCE_CHECKER(A9SCUState, A9_SCU,
-                         TYPE_A9_SCU)
+OBJECT_DECLARE_SIMPLE_TYPE(A9SCUState, A9_SCU)
 
 #endif
diff --git a/include/hw/misc/allwinner-cpucfg.h b/include/hw/misc/allwinner-cpucfg.h
index 058514d..a717b47 100644
--- a/include/hw/misc/allwinner-cpucfg.h
+++ b/include/hw/misc/allwinner-cpucfg.h
@@ -29,9 +29,7 @@
  */
 
 #define TYPE_AW_CPUCFG   "allwinner-cpucfg"
-typedef struct AwCpuCfgState AwCpuCfgState;
-DECLARE_INSTANCE_CHECKER(AwCpuCfgState, AW_CPUCFG,
-                         TYPE_AW_CPUCFG)
+OBJECT_DECLARE_SIMPLE_TYPE(AwCpuCfgState, AW_CPUCFG)
 
 /** @} */
 
diff --git a/include/hw/misc/allwinner-h3-ccu.h b/include/hw/misc/allwinner-h3-ccu.h
index 05f5c7b..a04875b 100644
--- a/include/hw/misc/allwinner-h3-ccu.h
+++ b/include/hw/misc/allwinner-h3-ccu.h
@@ -42,9 +42,7 @@
  */
 
 #define TYPE_AW_H3_CCU    "allwinner-h3-ccu"
-typedef struct AwH3ClockCtlState AwH3ClockCtlState;
-DECLARE_INSTANCE_CHECKER(AwH3ClockCtlState, AW_H3_CCU,
-                         TYPE_AW_H3_CCU)
+OBJECT_DECLARE_SIMPLE_TYPE(AwH3ClockCtlState, AW_H3_CCU)
 
 /** @} */
 
diff --git a/include/hw/misc/allwinner-h3-dramc.h b/include/hw/misc/allwinner-h3-dramc.h
index 60a13a6..0b6c877 100644
--- a/include/hw/misc/allwinner-h3-dramc.h
+++ b/include/hw/misc/allwinner-h3-dramc.h
@@ -58,9 +58,7 @@
  */
 
 #define TYPE_AW_H3_DRAMC "allwinner-h3-dramc"
-typedef struct AwH3DramCtlState AwH3DramCtlState;
-DECLARE_INSTANCE_CHECKER(AwH3DramCtlState, AW_H3_DRAMC,
-                         TYPE_AW_H3_DRAMC)
+OBJECT_DECLARE_SIMPLE_TYPE(AwH3DramCtlState, AW_H3_DRAMC)
 
 /** @} */
 
diff --git a/include/hw/misc/allwinner-h3-sysctrl.h b/include/hw/misc/allwinner-h3-sysctrl.h
index 50baa8e..ec1c220 100644
--- a/include/hw/misc/allwinner-h3-sysctrl.h
+++ b/include/hw/misc/allwinner-h3-sysctrl.h
@@ -43,9 +43,7 @@
  */
 
 #define TYPE_AW_H3_SYSCTRL    "allwinner-h3-sysctrl"
-typedef struct AwH3SysCtrlState AwH3SysCtrlState;
-DECLARE_INSTANCE_CHECKER(AwH3SysCtrlState, AW_H3_SYSCTRL,
-                         TYPE_AW_H3_SYSCTRL)
+OBJECT_DECLARE_SIMPLE_TYPE(AwH3SysCtrlState, AW_H3_SYSCTRL)
 
 /** @} */
 
diff --git a/include/hw/misc/allwinner-sid.h b/include/hw/misc/allwinner-sid.h
index b8e83bb..3bfa887 100644
--- a/include/hw/misc/allwinner-sid.h
+++ b/include/hw/misc/allwinner-sid.h
@@ -30,9 +30,7 @@
  */
 
 #define TYPE_AW_SID    "allwinner-sid"
-typedef struct AwSidState AwSidState;
-DECLARE_INSTANCE_CHECKER(AwSidState, AW_SID,
-                         TYPE_AW_SID)
+OBJECT_DECLARE_SIMPLE_TYPE(AwSidState, AW_SID)
 
 /** @} */
 
diff --git a/include/hw/misc/arm11scu.h b/include/hw/misc/arm11scu.h
index 71b4bc9..e5c0282 100644
--- a/include/hw/misc/arm11scu.h
+++ b/include/hw/misc/arm11scu.h
@@ -15,9 +15,7 @@
 #include "qom/object.h"
 
 #define TYPE_ARM11_SCU "arm11-scu"
-typedef struct ARM11SCUState ARM11SCUState;
-DECLARE_INSTANCE_CHECKER(ARM11SCUState, ARM11_SCU,
-                         TYPE_ARM11_SCU)
+OBJECT_DECLARE_SIMPLE_TYPE(ARM11SCUState, ARM11_SCU)
 
 struct ARM11SCUState {
     /*< private >*/
diff --git a/include/hw/misc/armsse-cpuid.h b/include/hw/misc/armsse-cpuid.h
index 80691c7..a61355e 100644
--- a/include/hw/misc/armsse-cpuid.h
+++ b/include/hw/misc/armsse-cpuid.h
@@ -26,9 +26,7 @@
 #include "qom/object.h"
 
 #define TYPE_ARMSSE_CPUID "armsse-cpuid"
-typedef struct ARMSSECPUID ARMSSECPUID;
-DECLARE_INSTANCE_CHECKER(ARMSSECPUID, ARMSSE_CPUID,
-                         TYPE_ARMSSE_CPUID)
+OBJECT_DECLARE_SIMPLE_TYPE(ARMSSECPUID, ARMSSE_CPUID)
 
 struct ARMSSECPUID {
     /*< private >*/
diff --git a/include/hw/misc/armsse-mhu.h b/include/hw/misc/armsse-mhu.h
index 310643a..2671b5b 100644
--- a/include/hw/misc/armsse-mhu.h
+++ b/include/hw/misc/armsse-mhu.h
@@ -27,9 +27,7 @@
 #include "qom/object.h"
 
 #define TYPE_ARMSSE_MHU "armsse-mhu"
-typedef struct ARMSSEMHU ARMSSEMHU;
-DECLARE_INSTANCE_CHECKER(ARMSSEMHU, ARMSSE_MHU,
-                         TYPE_ARMSSE_MHU)
+OBJECT_DECLARE_SIMPLE_TYPE(ARMSSEMHU, ARMSSE_MHU)
 
 struct ARMSSEMHU {
     /*< private >*/
diff --git a/include/hw/misc/aspeed_xdma.h b/include/hw/misc/aspeed_xdma.h
index 0e62c04..9869ef4 100644
--- a/include/hw/misc/aspeed_xdma.h
+++ b/include/hw/misc/aspeed_xdma.h
@@ -13,9 +13,7 @@
 #include "qom/object.h"
 
 #define TYPE_ASPEED_XDMA "aspeed.xdma"
-typedef struct AspeedXDMAState AspeedXDMAState;
-DECLARE_INSTANCE_CHECKER(AspeedXDMAState, ASPEED_XDMA,
-                         TYPE_ASPEED_XDMA)
+OBJECT_DECLARE_SIMPLE_TYPE(AspeedXDMAState, ASPEED_XDMA)
 
 #define ASPEED_XDMA_NUM_REGS (ASPEED_XDMA_REG_SIZE / sizeof(uint32_t))
 #define ASPEED_XDMA_REG_SIZE 0x7C
diff --git a/include/hw/misc/auxbus.h b/include/hw/misc/auxbus.h
index f910d94..b05799d 100644
--- a/include/hw/misc/auxbus.h
+++ b/include/hw/misc/auxbus.h
@@ -29,15 +29,12 @@
 #include "hw/qdev-core.h"
 #include "qom/object.h"
 
-typedef struct AUXBus AUXBus;
 typedef struct AUXSlave AUXSlave;
 typedef enum AUXCommand AUXCommand;
 typedef enum AUXReply AUXReply;
 
 #define TYPE_AUXTOI2C "aux-to-i2c-bridge"
-typedef struct AUXTOI2CState AUXTOI2CState;
-DECLARE_INSTANCE_CHECKER(AUXTOI2CState, AUXTOI2C,
-                         TYPE_AUXTOI2C)
+OBJECT_DECLARE_SIMPLE_TYPE(AUXTOI2CState, AUXTOI2C)
 
 enum AUXCommand {
     WRITE_I2C = 0,
@@ -58,8 +55,7 @@
 };
 
 #define TYPE_AUX_BUS "aux-bus"
-DECLARE_INSTANCE_CHECKER(AUXBus, AUX_BUS,
-                         TYPE_AUX_BUS)
+OBJECT_DECLARE_SIMPLE_TYPE(AUXBus, AUX_BUS)
 
 struct AUXBus {
     /* < private > */
@@ -78,8 +74,7 @@
 };
 
 #define TYPE_AUX_SLAVE "aux-slave"
-DECLARE_INSTANCE_CHECKER(AUXSlave, AUX_SLAVE,
-                         TYPE_AUX_SLAVE)
+OBJECT_DECLARE_SIMPLE_TYPE(AUXSlave, AUX_SLAVE)
 
 struct AUXSlave {
     /* < private > */
diff --git a/include/hw/misc/avr_power.h b/include/hw/misc/avr_power.h
index 938ab3e..707df03 100644
--- a/include/hw/misc/avr_power.h
+++ b/include/hw/misc/avr_power.h
@@ -31,9 +31,7 @@
 
 
 #define TYPE_AVR_MASK "avr-power"
-typedef struct AVRMaskState AVRMaskState;
-DECLARE_INSTANCE_CHECKER(AVRMaskState, AVR_MASK,
-                         TYPE_AVR_MASK)
+OBJECT_DECLARE_SIMPLE_TYPE(AVRMaskState, AVR_MASK)
 
 struct AVRMaskState {
     /* <private> */
diff --git a/include/hw/misc/bcm2835_mbox.h b/include/hw/misc/bcm2835_mbox.h
index d8c8017..ade27af 100644
--- a/include/hw/misc/bcm2835_mbox.h
+++ b/include/hw/misc/bcm2835_mbox.h
@@ -13,9 +13,7 @@
 #include "qom/object.h"
 
 #define TYPE_BCM2835_MBOX "bcm2835-mbox"
-typedef struct BCM2835MboxState BCM2835MboxState;
-DECLARE_INSTANCE_CHECKER(BCM2835MboxState, BCM2835_MBOX,
-                         TYPE_BCM2835_MBOX)
+OBJECT_DECLARE_SIMPLE_TYPE(BCM2835MboxState, BCM2835_MBOX)
 
 typedef struct {
     uint32_t reg[MBOX_SIZE];
diff --git a/include/hw/misc/bcm2835_mphi.h b/include/hw/misc/bcm2835_mphi.h
index 2495111..751363f 100644
--- a/include/hw/misc/bcm2835_mphi.h
+++ b/include/hw/misc/bcm2835_mphi.h
@@ -39,7 +39,6 @@
 
 #define TYPE_BCM2835_MPHI   "bcm2835-mphi"
 
-DECLARE_INSTANCE_CHECKER(BCM2835MphiState, BCM2835_MPHI,
-                         TYPE_BCM2835_MPHI)
+OBJECT_DECLARE_SIMPLE_TYPE(BCM2835MphiState, BCM2835_MPHI)
 
 #endif
diff --git a/include/hw/misc/bcm2835_property.h b/include/hw/misc/bcm2835_property.h
index 5c827a1..712b76b 100644
--- a/include/hw/misc/bcm2835_property.h
+++ b/include/hw/misc/bcm2835_property.h
@@ -14,9 +14,7 @@
 #include "qom/object.h"
 
 #define TYPE_BCM2835_PROPERTY "bcm2835-property"
-typedef struct BCM2835PropertyState BCM2835PropertyState;
-DECLARE_INSTANCE_CHECKER(BCM2835PropertyState, BCM2835_PROPERTY,
-                         TYPE_BCM2835_PROPERTY)
+OBJECT_DECLARE_SIMPLE_TYPE(BCM2835PropertyState, BCM2835_PROPERTY)
 
 struct BCM2835PropertyState {
     /*< private >*/
diff --git a/include/hw/misc/bcm2835_rng.h b/include/hw/misc/bcm2835_rng.h
index fec76ee..7c1fb3e 100644
--- a/include/hw/misc/bcm2835_rng.h
+++ b/include/hw/misc/bcm2835_rng.h
@@ -14,9 +14,7 @@
 #include "qom/object.h"
 
 #define TYPE_BCM2835_RNG "bcm2835-rng"
-typedef struct BCM2835RngState BCM2835RngState;
-DECLARE_INSTANCE_CHECKER(BCM2835RngState, BCM2835_RNG,
-                         TYPE_BCM2835_RNG)
+OBJECT_DECLARE_SIMPLE_TYPE(BCM2835RngState, BCM2835_RNG)
 
 struct BCM2835RngState {
     SysBusDevice busdev;
diff --git a/include/hw/misc/bcm2835_thermal.h b/include/hw/misc/bcm2835_thermal.h
index 5b827c9..f90f9e4 100644
--- a/include/hw/misc/bcm2835_thermal.h
+++ b/include/hw/misc/bcm2835_thermal.h
@@ -14,9 +14,7 @@
 
 #define TYPE_BCM2835_THERMAL "bcm2835-thermal"
 
-typedef struct Bcm2835ThermalState Bcm2835ThermalState;
-DECLARE_INSTANCE_CHECKER(Bcm2835ThermalState, BCM2835_THERMAL,
-                         TYPE_BCM2835_THERMAL)
+OBJECT_DECLARE_SIMPLE_TYPE(Bcm2835ThermalState, BCM2835_THERMAL)
 
 struct Bcm2835ThermalState {
     /*< private >*/
diff --git a/include/hw/misc/grlib_ahb_apb_pnp.h b/include/hw/misc/grlib_ahb_apb_pnp.h
index 34b18e3..341451b 100644
--- a/include/hw/misc/grlib_ahb_apb_pnp.h
+++ b/include/hw/misc/grlib_ahb_apb_pnp.h
@@ -26,14 +26,10 @@
 #include "qom/object.h"
 
 #define TYPE_GRLIB_AHB_PNP "grlib,ahbpnp"
-typedef struct AHBPnp AHBPnp;
-DECLARE_INSTANCE_CHECKER(AHBPnp, GRLIB_AHB_PNP,
-                         TYPE_GRLIB_AHB_PNP)
+OBJECT_DECLARE_SIMPLE_TYPE(AHBPnp, GRLIB_AHB_PNP)
 
 #define TYPE_GRLIB_APB_PNP "grlib,apbpnp"
-typedef struct APBPnp APBPnp;
-DECLARE_INSTANCE_CHECKER(APBPnp, GRLIB_APB_PNP,
-                         TYPE_GRLIB_APB_PNP)
+OBJECT_DECLARE_SIMPLE_TYPE(APBPnp, GRLIB_APB_PNP)
 
 void grlib_ahb_pnp_add_entry(AHBPnp *dev, uint32_t address, uint32_t mask,
                              uint8_t vendor, uint16_t device, int slave,
diff --git a/include/hw/misc/imx25_ccm.h b/include/hw/misc/imx25_ccm.h
index 55c5db8..c3b8901 100644
--- a/include/hw/misc/imx25_ccm.h
+++ b/include/hw/misc/imx25_ccm.h
@@ -64,9 +64,7 @@
                              CCTL_##name##_SHIFT)
 
 #define TYPE_IMX25_CCM "imx25.ccm"
-typedef struct IMX25CCMState IMX25CCMState;
-DECLARE_INSTANCE_CHECKER(IMX25CCMState, IMX25_CCM,
-                         TYPE_IMX25_CCM)
+OBJECT_DECLARE_SIMPLE_TYPE(IMX25CCMState, IMX25_CCM)
 
 struct IMX25CCMState {
     /* <private> */
diff --git a/include/hw/misc/imx31_ccm.h b/include/hw/misc/imx31_ccm.h
index 25e280e..18e08ee 100644
--- a/include/hw/misc/imx31_ccm.h
+++ b/include/hw/misc/imx31_ccm.h
@@ -73,9 +73,7 @@
                              PDR0_##name##_PODF_SHIFT)
 
 #define TYPE_IMX31_CCM "imx31.ccm"
-typedef struct IMX31CCMState IMX31CCMState;
-DECLARE_INSTANCE_CHECKER(IMX31CCMState, IMX31_CCM,
-                         TYPE_IMX31_CCM)
+OBJECT_DECLARE_SIMPLE_TYPE(IMX31CCMState, IMX31_CCM)
 
 struct IMX31CCMState {
     /* <private> */
diff --git a/include/hw/misc/imx6_ccm.h b/include/hw/misc/imx6_ccm.h
index 85f3241..ccf46d7 100644
--- a/include/hw/misc/imx6_ccm.h
+++ b/include/hw/misc/imx6_ccm.h
@@ -179,9 +179,7 @@
 #define EXTRACT(value, name) extract32(value, name##_SHIFT, name##_LENGTH)
 
 #define TYPE_IMX6_CCM "imx6.ccm"
-typedef struct IMX6CCMState IMX6CCMState;
-DECLARE_INSTANCE_CHECKER(IMX6CCMState, IMX6_CCM,
-                         TYPE_IMX6_CCM)
+OBJECT_DECLARE_SIMPLE_TYPE(IMX6CCMState, IMX6_CCM)
 
 struct IMX6CCMState {
     /* <private> */
diff --git a/include/hw/misc/imx6_src.h b/include/hw/misc/imx6_src.h
index 15b5175..f380da3 100644
--- a/include/hw/misc/imx6_src.h
+++ b/include/hw/misc/imx6_src.h
@@ -58,9 +58,7 @@
 #define EXTRACT(value, name) extract32(value, name##_SHIFT, name##_LENGTH)
 
 #define TYPE_IMX6_SRC "imx6.src"
-typedef struct IMX6SRCState IMX6SRCState;
-DECLARE_INSTANCE_CHECKER(IMX6SRCState, IMX6_SRC,
-                         TYPE_IMX6_SRC)
+OBJECT_DECLARE_SIMPLE_TYPE(IMX6SRCState, IMX6_SRC)
 
 struct IMX6SRCState {
     /* <private> */
diff --git a/include/hw/misc/imx6ul_ccm.h b/include/hw/misc/imx6ul_ccm.h
index d614de0..edb5f78 100644
--- a/include/hw/misc/imx6ul_ccm.h
+++ b/include/hw/misc/imx6ul_ccm.h
@@ -208,9 +208,7 @@
 #define CCM_ANALOG_PLL_LOCK      (1 << 31);
 
 #define TYPE_IMX6UL_CCM "imx6ul.ccm"
-typedef struct IMX6ULCCMState IMX6ULCCMState;
-DECLARE_INSTANCE_CHECKER(IMX6ULCCMState, IMX6UL_CCM,
-                         TYPE_IMX6UL_CCM)
+OBJECT_DECLARE_SIMPLE_TYPE(IMX6ULCCMState, IMX6UL_CCM)
 
 struct IMX6ULCCMState {
     /* <private> */
diff --git a/include/hw/misc/imx7_ccm.h b/include/hw/misc/imx7_ccm.h
index e275762..dcaebfb 100644
--- a/include/hw/misc/imx7_ccm.h
+++ b/include/hw/misc/imx7_ccm.h
@@ -105,9 +105,7 @@
 };
 
 #define TYPE_IMX7_CCM "imx7.ccm"
-typedef struct IMX7CCMState IMX7CCMState;
-DECLARE_INSTANCE_CHECKER(IMX7CCMState, IMX7_CCM,
-                         TYPE_IMX7_CCM)
+OBJECT_DECLARE_SIMPLE_TYPE(IMX7CCMState, IMX7_CCM)
 
 struct IMX7CCMState {
     /* <private> */
@@ -121,9 +119,7 @@
 
 
 #define TYPE_IMX7_ANALOG "imx7.analog"
-typedef struct IMX7AnalogState IMX7AnalogState;
-DECLARE_INSTANCE_CHECKER(IMX7AnalogState, IMX7_ANALOG,
-                         TYPE_IMX7_ANALOG)
+OBJECT_DECLARE_SIMPLE_TYPE(IMX7AnalogState, IMX7_ANALOG)
 
 struct IMX7AnalogState {
     /* <private> */
diff --git a/include/hw/misc/imx7_gpr.h b/include/hw/misc/imx7_gpr.h
index f80b3ed..df364bd 100644
--- a/include/hw/misc/imx7_gpr.h
+++ b/include/hw/misc/imx7_gpr.h
@@ -17,9 +17,7 @@
 #include "qom/object.h"
 
 #define TYPE_IMX7_GPR "imx7.gpr"
-typedef struct IMX7GPRState IMX7GPRState;
-DECLARE_INSTANCE_CHECKER(IMX7GPRState, IMX7_GPR,
-                         TYPE_IMX7_GPR)
+OBJECT_DECLARE_SIMPLE_TYPE(IMX7GPRState, IMX7_GPR)
 
 struct IMX7GPRState {
     /* <private> */
diff --git a/include/hw/misc/imx7_snvs.h b/include/hw/misc/imx7_snvs.h
index ea5395c..14a1d6f 100644
--- a/include/hw/misc/imx7_snvs.h
+++ b/include/hw/misc/imx7_snvs.h
@@ -24,9 +24,7 @@
 };
 
 #define TYPE_IMX7_SNVS "imx7.snvs"
-typedef struct IMX7SNVSState IMX7SNVSState;
-DECLARE_INSTANCE_CHECKER(IMX7SNVSState, IMX7_SNVS,
-                         TYPE_IMX7_SNVS)
+OBJECT_DECLARE_SIMPLE_TYPE(IMX7SNVSState, IMX7_SNVS)
 
 struct IMX7SNVSState {
     /* <private> */
diff --git a/include/hw/misc/imx_rngc.h b/include/hw/misc/imx_rngc.h
index f7b569c..34ad699 100644
--- a/include/hw/misc/imx_rngc.h
+++ b/include/hw/misc/imx_rngc.h
@@ -14,9 +14,7 @@
 #include "qom/object.h"
 
 #define TYPE_IMX_RNGC "imx.rngc"
-typedef struct IMXRNGCState IMXRNGCState;
-DECLARE_INSTANCE_CHECKER(IMXRNGCState, IMX_RNGC,
-                         TYPE_IMX_RNGC)
+OBJECT_DECLARE_SIMPLE_TYPE(IMXRNGCState, IMX_RNGC)
 
 struct IMXRNGCState {
     /*< private >*/
diff --git a/include/hw/misc/iotkit-secctl.h b/include/hw/misc/iotkit-secctl.h
index d062ed4..54c212b 100644
--- a/include/hw/misc/iotkit-secctl.h
+++ b/include/hw/misc/iotkit-secctl.h
@@ -59,9 +59,7 @@
 #include "qom/object.h"
 
 #define TYPE_IOTKIT_SECCTL "iotkit-secctl"
-typedef struct IoTKitSecCtl IoTKitSecCtl;
-DECLARE_INSTANCE_CHECKER(IoTKitSecCtl, IOTKIT_SECCTL,
-                         TYPE_IOTKIT_SECCTL)
+OBJECT_DECLARE_SIMPLE_TYPE(IoTKitSecCtl, IOTKIT_SECCTL)
 
 #define IOTS_APB_PPC0_NUM_PORTS 3
 #define IOTS_APB_PPC1_NUM_PORTS 1
diff --git a/include/hw/misc/iotkit-sysctl.h b/include/hw/misc/iotkit-sysctl.h
index 22ceb5d..2b5636b 100644
--- a/include/hw/misc/iotkit-sysctl.h
+++ b/include/hw/misc/iotkit-sysctl.h
@@ -31,9 +31,7 @@
 #include "qom/object.h"
 
 #define TYPE_IOTKIT_SYSCTL "iotkit-sysctl"
-typedef struct IoTKitSysCtl IoTKitSysCtl;
-DECLARE_INSTANCE_CHECKER(IoTKitSysCtl, IOTKIT_SYSCTL,
-                         TYPE_IOTKIT_SYSCTL)
+OBJECT_DECLARE_SIMPLE_TYPE(IoTKitSysCtl, IOTKIT_SYSCTL)
 
 struct IoTKitSysCtl {
     /*< private >*/
diff --git a/include/hw/misc/iotkit-sysinfo.h b/include/hw/misc/iotkit-sysinfo.h
index 23ae43e..7e620e2 100644
--- a/include/hw/misc/iotkit-sysinfo.h
+++ b/include/hw/misc/iotkit-sysinfo.h
@@ -26,9 +26,7 @@
 #include "qom/object.h"
 
 #define TYPE_IOTKIT_SYSINFO "iotkit-sysinfo"
-typedef struct IoTKitSysInfo IoTKitSysInfo;
-DECLARE_INSTANCE_CHECKER(IoTKitSysInfo, IOTKIT_SYSINFO,
-                         TYPE_IOTKIT_SYSINFO)
+OBJECT_DECLARE_SIMPLE_TYPE(IoTKitSysInfo, IOTKIT_SYSINFO)
 
 struct IoTKitSysInfo {
     /*< private >*/
diff --git a/include/hw/misc/mac_via.h b/include/hw/misc/mac_via.h
index 862cbba..a59f0bd 100644
--- a/include/hw/misc/mac_via.h
+++ b/include/hw/misc/mac_via.h
@@ -32,9 +32,7 @@
 
 
 #define TYPE_MOS6522_Q800_VIA1 "mos6522-q800-via1"
-typedef struct MOS6522Q800VIA1State MOS6522Q800VIA1State;
-DECLARE_INSTANCE_CHECKER(MOS6522Q800VIA1State, MOS6522_Q800_VIA1,
-                         TYPE_MOS6522_Q800_VIA1)
+OBJECT_DECLARE_SIMPLE_TYPE(MOS6522Q800VIA1State, MOS6522_Q800_VIA1)
 
 struct MOS6522Q800VIA1State {
     /*< private >*/
@@ -68,9 +66,7 @@
 #define VIA2_IRQ_ASC        (1 << VIA2_IRQ_ASC_BIT)
 
 #define TYPE_MOS6522_Q800_VIA2 "mos6522-q800-via2"
-typedef struct MOS6522Q800VIA2State MOS6522Q800VIA2State;
-DECLARE_INSTANCE_CHECKER(MOS6522Q800VIA2State, MOS6522_Q800_VIA2,
-                         TYPE_MOS6522_Q800_VIA2)
+OBJECT_DECLARE_SIMPLE_TYPE(MOS6522Q800VIA2State, MOS6522_Q800_VIA2)
 
 struct MOS6522Q800VIA2State {
     /*< private >*/
@@ -79,9 +75,7 @@
 
 
 #define TYPE_MAC_VIA "mac_via"
-typedef struct MacVIAState MacVIAState;
-DECLARE_INSTANCE_CHECKER(MacVIAState, MAC_VIA,
-                         TYPE_MAC_VIA)
+OBJECT_DECLARE_SIMPLE_TYPE(MacVIAState, MAC_VIA)
 
 struct MacVIAState {
     SysBusDevice busdev;
diff --git a/include/hw/misc/macio/cuda.h b/include/hw/misc/macio/cuda.h
index e738b63..a71deec 100644
--- a/include/hw/misc/macio/cuda.h
+++ b/include/hw/misc/macio/cuda.h
@@ -63,17 +63,13 @@
     /*< private >*/
     MOS6522State parent_obj;
 };
-typedef struct MOS6522CUDAState MOS6522CUDAState;
 
 #define TYPE_MOS6522_CUDA "mos6522-cuda"
-DECLARE_INSTANCE_CHECKER(MOS6522CUDAState, MOS6522_CUDA,
-                         TYPE_MOS6522_CUDA)
+OBJECT_DECLARE_SIMPLE_TYPE(MOS6522CUDAState, MOS6522_CUDA)
 
 /* Cuda */
 #define TYPE_CUDA "cuda"
-typedef struct CUDAState CUDAState;
-DECLARE_INSTANCE_CHECKER(CUDAState, CUDA,
-                         TYPE_CUDA)
+OBJECT_DECLARE_SIMPLE_TYPE(CUDAState, CUDA)
 
 struct CUDAState {
     /*< private >*/
diff --git a/include/hw/misc/macio/gpio.h b/include/hw/misc/macio/gpio.h
index 1d0c843..4dee09a 100644
--- a/include/hw/misc/macio/gpio.h
+++ b/include/hw/misc/macio/gpio.h
@@ -31,9 +31,7 @@
 #include "qom/object.h"
 
 #define TYPE_MACIO_GPIO "macio-gpio"
-typedef struct MacIOGPIOState MacIOGPIOState;
-DECLARE_INSTANCE_CHECKER(MacIOGPIOState, MACIO_GPIO,
-                         TYPE_MACIO_GPIO)
+OBJECT_DECLARE_SIMPLE_TYPE(MacIOGPIOState, MACIO_GPIO)
 
 struct MacIOGPIOState {
     /*< private >*/
diff --git a/include/hw/misc/macio/macio.h b/include/hw/misc/macio/macio.h
index 02dbf37..22b4e64 100644
--- a/include/hw/misc/macio/macio.h
+++ b/include/hw/misc/macio/macio.h
@@ -40,9 +40,7 @@
 
 /* MacIO virtual bus */
 #define TYPE_MACIO_BUS "macio-bus"
-typedef struct MacIOBusState MacIOBusState;
-DECLARE_INSTANCE_CHECKER(MacIOBusState, MACIO_BUS,
-                         TYPE_MACIO_BUS)
+OBJECT_DECLARE_SIMPLE_TYPE(MacIOBusState, MACIO_BUS)
 
 struct MacIOBusState {
     /*< private >*/
@@ -51,9 +49,7 @@
 
 /* MacIO IDE */
 #define TYPE_MACIO_IDE "macio-ide"
-typedef struct MACIOIDEState MACIOIDEState;
-DECLARE_INSTANCE_CHECKER(MACIOIDEState, MACIO_IDE,
-                         TYPE_MACIO_IDE)
+OBJECT_DECLARE_SIMPLE_TYPE(MACIOIDEState, MACIO_IDE)
 
 struct MACIOIDEState {
     /*< private >*/
@@ -79,9 +75,7 @@
 void macio_ide_register_dma(MACIOIDEState *ide);
 
 #define TYPE_MACIO "macio"
-typedef struct MacIOState MacIOState;
-DECLARE_INSTANCE_CHECKER(MacIOState, MACIO,
-                         TYPE_MACIO)
+OBJECT_DECLARE_SIMPLE_TYPE(MacIOState, MACIO)
 
 struct MacIOState {
     /*< private >*/
@@ -98,9 +92,7 @@
 };
 
 #define TYPE_OLDWORLD_MACIO "macio-oldworld"
-typedef struct OldWorldMacIOState OldWorldMacIOState;
-DECLARE_INSTANCE_CHECKER(OldWorldMacIOState, OLDWORLD_MACIO,
-                         TYPE_OLDWORLD_MACIO)
+OBJECT_DECLARE_SIMPLE_TYPE(OldWorldMacIOState, OLDWORLD_MACIO)
 
 struct OldWorldMacIOState {
     /*< private >*/
@@ -114,9 +106,7 @@
 };
 
 #define TYPE_NEWWORLD_MACIO "macio-newworld"
-typedef struct NewWorldMacIOState NewWorldMacIOState;
-DECLARE_INSTANCE_CHECKER(NewWorldMacIOState, NEWWORLD_MACIO,
-                         TYPE_NEWWORLD_MACIO)
+OBJECT_DECLARE_SIMPLE_TYPE(NewWorldMacIOState, NEWWORLD_MACIO)
 
 struct NewWorldMacIOState {
     /*< private >*/
diff --git a/include/hw/misc/macio/pmu.h b/include/hw/misc/macio/pmu.h
index 0d1a5c1..78237d9 100644
--- a/include/hw/misc/macio/pmu.h
+++ b/include/hw/misc/macio/pmu.h
@@ -178,11 +178,9 @@
     /*< private >*/
     MOS6522State parent_obj;
 };
-typedef struct MOS6522PMUState MOS6522PMUState;
 
 #define TYPE_MOS6522_PMU "mos6522-pmu"
-DECLARE_INSTANCE_CHECKER(MOS6522PMUState, MOS6522_PMU,
-                         TYPE_MOS6522_PMU)
+OBJECT_DECLARE_SIMPLE_TYPE(MOS6522PMUState, MOS6522_PMU)
 /**
  * PMUState:
  * @last_b: last value of B register
@@ -231,10 +229,8 @@
     /* GPIO */
     MacIOGPIOState *gpio;
 };
-typedef struct PMUState PMUState;
 
 #define TYPE_VIA_PMU "via-pmu"
-DECLARE_INSTANCE_CHECKER(PMUState, VIA_PMU,
-                         TYPE_VIA_PMU)
+OBJECT_DECLARE_SIMPLE_TYPE(PMUState, VIA_PMU)
 
 #endif /* PMU_H */
diff --git a/include/hw/misc/max111x.h b/include/hw/misc/max111x.h
index 6350a3f..606cf1e 100644
--- a/include/hw/misc/max111x.h
+++ b/include/hw/misc/max111x.h
@@ -45,12 +45,10 @@
     uint8_t input[8];
     int inputs, com;
 };
-typedef struct MAX111xState MAX111xState;
 
 #define TYPE_MAX_111X "max111x"
 
-DECLARE_INSTANCE_CHECKER(MAX111xState, MAX_111X,
-                         TYPE_MAX_111X)
+OBJECT_DECLARE_SIMPLE_TYPE(MAX111xState, MAX_111X)
 
 #define TYPE_MAX_1110 "max1110"
 #define TYPE_MAX_1111 "max1111"
diff --git a/include/hw/misc/mips_cmgcr.h b/include/hw/misc/mips_cmgcr.h
index 923df4f..9fa5894 100644
--- a/include/hw/misc/mips_cmgcr.h
+++ b/include/hw/misc/mips_cmgcr.h
@@ -14,9 +14,7 @@
 #include "qom/object.h"
 
 #define TYPE_MIPS_GCR "mips-gcr"
-typedef struct MIPSGCRState MIPSGCRState;
-DECLARE_INSTANCE_CHECKER(MIPSGCRState, MIPS_GCR,
-                         TYPE_MIPS_GCR)
+OBJECT_DECLARE_SIMPLE_TYPE(MIPSGCRState, MIPS_GCR)
 
 #define GCR_BASE_ADDR           0x1fbf8000ULL
 #define GCR_ADDRSPACE_SZ        0x8000
diff --git a/include/hw/misc/mips_cpc.h b/include/hw/misc/mips_cpc.h
index 7dc188e..e5dccea 100644
--- a/include/hw/misc/mips_cpc.h
+++ b/include/hw/misc/mips_cpc.h
@@ -35,9 +35,7 @@
 #define CPC_VP_RUNNING_OFS  0x30
 
 #define TYPE_MIPS_CPC "mips-cpc"
-typedef struct MIPSCPCState MIPSCPCState;
-DECLARE_INSTANCE_CHECKER(MIPSCPCState, MIPS_CPC,
-                         TYPE_MIPS_CPC)
+OBJECT_DECLARE_SIMPLE_TYPE(MIPSCPCState, MIPS_CPC)
 
 struct MIPSCPCState {
     SysBusDevice parent_obj;
diff --git a/include/hw/misc/mips_itu.h b/include/hw/misc/mips_itu.h
index 7c19f61..96347db 100644
--- a/include/hw/misc/mips_itu.h
+++ b/include/hw/misc/mips_itu.h
@@ -24,9 +24,7 @@
 #include "qom/object.h"
 
 #define TYPE_MIPS_ITU "mips-itu"
-typedef struct MIPSITUState MIPSITUState;
-DECLARE_INSTANCE_CHECKER(MIPSITUState, MIPS_ITU,
-                         TYPE_MIPS_ITU)
+OBJECT_DECLARE_SIMPLE_TYPE(MIPSITUState, MIPS_ITU)
 
 #define ITC_CELL_DEPTH_SHIFT 2
 #define ITC_CELL_DEPTH (1u << ITC_CELL_DEPTH_SHIFT)
diff --git a/include/hw/misc/mps2-fpgaio.h b/include/hw/misc/mps2-fpgaio.h
index 991f5b7..80f9227 100644
--- a/include/hw/misc/mps2-fpgaio.h
+++ b/include/hw/misc/mps2-fpgaio.h
@@ -25,9 +25,7 @@
 #include "qom/object.h"
 
 #define TYPE_MPS2_FPGAIO "mps2-fpgaio"
-typedef struct MPS2FPGAIO MPS2FPGAIO;
-DECLARE_INSTANCE_CHECKER(MPS2FPGAIO, MPS2_FPGAIO,
-                         TYPE_MPS2_FPGAIO)
+OBJECT_DECLARE_SIMPLE_TYPE(MPS2FPGAIO, MPS2_FPGAIO)
 
 struct MPS2FPGAIO {
     /*< private >*/
diff --git a/include/hw/misc/mps2-scc.h b/include/hw/misc/mps2-scc.h
index 445e268..e922b3c 100644
--- a/include/hw/misc/mps2-scc.h
+++ b/include/hw/misc/mps2-scc.h
@@ -16,9 +16,7 @@
 #include "qom/object.h"
 
 #define TYPE_MPS2_SCC "mps2-scc"
-typedef struct MPS2SCC MPS2SCC;
-DECLARE_INSTANCE_CHECKER(MPS2SCC, MPS2_SCC,
-                         TYPE_MPS2_SCC)
+OBJECT_DECLARE_SIMPLE_TYPE(MPS2SCC, MPS2_SCC)
 
 #define NUM_OSCCLK 3
 
diff --git a/include/hw/misc/msf2-sysreg.h b/include/hw/misc/msf2-sysreg.h
index 6259323..fc1890e 100644
--- a/include/hw/misc/msf2-sysreg.h
+++ b/include/hw/misc/msf2-sysreg.h
@@ -62,9 +62,7 @@
 #define MSF2_SYSREG_MMIO_SIZE     0x300
 
 #define TYPE_MSF2_SYSREG          "msf2-sysreg"
-typedef struct MSF2SysregState MSF2SysregState;
-DECLARE_INSTANCE_CHECKER(MSF2SysregState, MSF2_SYSREG,
-                         TYPE_MSF2_SYSREG)
+OBJECT_DECLARE_SIMPLE_TYPE(MSF2SysregState, MSF2_SYSREG)
 
 struct MSF2SysregState {
     SysBusDevice parent_obj;
diff --git a/include/hw/misc/nrf51_rng.h b/include/hw/misc/nrf51_rng.h
index 7f2263a..9aff9a76 100644
--- a/include/hw/misc/nrf51_rng.h
+++ b/include/hw/misc/nrf51_rng.h
@@ -38,9 +38,7 @@
 #include "qemu/timer.h"
 #include "qom/object.h"
 #define TYPE_NRF51_RNG "nrf51_soc.rng"
-typedef struct NRF51RNGState NRF51RNGState;
-DECLARE_INSTANCE_CHECKER(NRF51RNGState, NRF51_RNG,
-                         TYPE_NRF51_RNG)
+OBJECT_DECLARE_SIMPLE_TYPE(NRF51RNGState, NRF51_RNG)
 
 #define NRF51_RNG_SIZE         0x1000
 
diff --git a/include/hw/misc/stm32f2xx_syscfg.h b/include/hw/misc/stm32f2xx_syscfg.h
index 82ccd7c..57a98c5 100644
--- a/include/hw/misc/stm32f2xx_syscfg.h
+++ b/include/hw/misc/stm32f2xx_syscfg.h
@@ -37,9 +37,7 @@
 #define SYSCFG_CMPCR   0x20
 
 #define TYPE_STM32F2XX_SYSCFG "stm32f2xx-syscfg"
-typedef struct STM32F2XXSyscfgState STM32F2XXSyscfgState;
-DECLARE_INSTANCE_CHECKER(STM32F2XXSyscfgState, STM32F2XX_SYSCFG,
-                         TYPE_STM32F2XX_SYSCFG)
+OBJECT_DECLARE_SIMPLE_TYPE(STM32F2XXSyscfgState, STM32F2XX_SYSCFG)
 
 struct STM32F2XXSyscfgState {
     /* <private> */
diff --git a/include/hw/misc/stm32f4xx_exti.h b/include/hw/misc/stm32f4xx_exti.h
index 4987c28..24b6fa7 100644
--- a/include/hw/misc/stm32f4xx_exti.h
+++ b/include/hw/misc/stm32f4xx_exti.h
@@ -37,9 +37,7 @@
 #define EXTI_PR    0x14
 
 #define TYPE_STM32F4XX_EXTI "stm32f4xx-exti"
-typedef struct STM32F4xxExtiState STM32F4xxExtiState;
-DECLARE_INSTANCE_CHECKER(STM32F4xxExtiState, STM32F4XX_EXTI,
-                         TYPE_STM32F4XX_EXTI)
+OBJECT_DECLARE_SIMPLE_TYPE(STM32F4xxExtiState, STM32F4XX_EXTI)
 
 #define NUM_GPIO_EVENT_IN_LINES 16
 #define NUM_INTERRUPT_OUT_LINES 16
diff --git a/include/hw/misc/stm32f4xx_syscfg.h b/include/hw/misc/stm32f4xx_syscfg.h
index c3d89d4..8c31fec 100644
--- a/include/hw/misc/stm32f4xx_syscfg.h
+++ b/include/hw/misc/stm32f4xx_syscfg.h
@@ -38,9 +38,7 @@
 #define SYSCFG_CMPCR   0x20
 
 #define TYPE_STM32F4XX_SYSCFG "stm32f4xx-syscfg"
-typedef struct STM32F4xxSyscfgState STM32F4xxSyscfgState;
-DECLARE_INSTANCE_CHECKER(STM32F4xxSyscfgState, STM32F4XX_SYSCFG,
-                         TYPE_STM32F4XX_SYSCFG)
+OBJECT_DECLARE_SIMPLE_TYPE(STM32F4xxSyscfgState, STM32F4XX_SYSCFG)
 
 #define SYSCFG_NUM_EXTICR 4
 
diff --git a/include/hw/misc/tz-mpc.h b/include/hw/misc/tz-mpc.h
index 34e45fd..74d5d82 100644
--- a/include/hw/misc/tz-mpc.h
+++ b/include/hw/misc/tz-mpc.h
@@ -35,9 +35,7 @@
 #include "qom/object.h"
 
 #define TYPE_TZ_MPC "tz-mpc"
-typedef struct TZMPC TZMPC;
-DECLARE_INSTANCE_CHECKER(TZMPC, TZ_MPC,
-                         TYPE_TZ_MPC)
+OBJECT_DECLARE_SIMPLE_TYPE(TZMPC, TZ_MPC)
 
 #define TZ_NUM_PORTS 16
 
diff --git a/include/hw/misc/tz-msc.h b/include/hw/misc/tz-msc.h
index 7169f33..77cc7f2 100644
--- a/include/hw/misc/tz-msc.h
+++ b/include/hw/misc/tz-msc.h
@@ -55,9 +55,7 @@
 #include "qom/object.h"
 
 #define TYPE_TZ_MSC "tz-msc"
-typedef struct TZMSC TZMSC;
-DECLARE_INSTANCE_CHECKER(TZMSC, TZ_MSC,
-                         TYPE_TZ_MSC)
+OBJECT_DECLARE_SIMPLE_TYPE(TZMSC, TZ_MSC)
 
 struct TZMSC {
     /*< private >*/
diff --git a/include/hw/misc/tz-ppc.h b/include/hw/misc/tz-ppc.h
index b5251b7..021d671 100644
--- a/include/hw/misc/tz-ppc.h
+++ b/include/hw/misc/tz-ppc.h
@@ -69,9 +69,7 @@
 #include "qom/object.h"
 
 #define TYPE_TZ_PPC "tz-ppc"
-typedef struct TZPPC TZPPC;
-DECLARE_INSTANCE_CHECKER(TZPPC, TZ_PPC,
-                         TYPE_TZ_PPC)
+OBJECT_DECLARE_SIMPLE_TYPE(TZPPC, TZ_PPC)
 
 #define TZ_NUM_PORTS 16
 
diff --git a/include/hw/misc/unimp.h b/include/hw/misc/unimp.h
index 7c724ba..518d627 100644
--- a/include/hw/misc/unimp.h
+++ b/include/hw/misc/unimp.h
@@ -15,9 +15,7 @@
 
 #define TYPE_UNIMPLEMENTED_DEVICE "unimplemented-device"
 
-typedef struct UnimplementedDeviceState UnimplementedDeviceState;
-DECLARE_INSTANCE_CHECKER(UnimplementedDeviceState, UNIMPLEMENTED_DEVICE,
-                         TYPE_UNIMPLEMENTED_DEVICE)
+OBJECT_DECLARE_SIMPLE_TYPE(UnimplementedDeviceState, UNIMPLEMENTED_DEVICE)
 
 struct UnimplementedDeviceState {
     SysBusDevice parent_obj;
diff --git a/include/hw/misc/zynq-xadc.h b/include/hw/misc/zynq-xadc.h
index 052f479..602bfb4 100644
--- a/include/hw/misc/zynq-xadc.h
+++ b/include/hw/misc/zynq-xadc.h
@@ -24,9 +24,7 @@
 #define ZYNQ_XADC_FIFO_DEPTH    15
 
 #define TYPE_ZYNQ_XADC          "xlnx,zynq-xadc"
-typedef struct ZynqXADCState ZynqXADCState;
-DECLARE_INSTANCE_CHECKER(ZynqXADCState, ZYNQ_XADC,
-                         TYPE_ZYNQ_XADC)
+OBJECT_DECLARE_SIMPLE_TYPE(ZynqXADCState, ZYNQ_XADC)
 
 struct ZynqXADCState {
     /*< private >*/
diff --git a/include/hw/net/allwinner-sun8i-emac.h b/include/hw/net/allwinner-sun8i-emac.h
index 89e56b8..460a58f 100644
--- a/include/hw/net/allwinner-sun8i-emac.h
+++ b/include/hw/net/allwinner-sun8i-emac.h
@@ -30,9 +30,7 @@
  */
 
 #define TYPE_AW_SUN8I_EMAC "allwinner-sun8i-emac"
-typedef struct AwSun8iEmacState AwSun8iEmacState;
-DECLARE_INSTANCE_CHECKER(AwSun8iEmacState, AW_SUN8I_EMAC,
-                         TYPE_AW_SUN8I_EMAC)
+OBJECT_DECLARE_SIMPLE_TYPE(AwSun8iEmacState, AW_SUN8I_EMAC)
 
 /** @} */
 
diff --git a/include/hw/net/allwinner_emac.h b/include/hw/net/allwinner_emac.h
index f5f5b67..534e748 100644
--- a/include/hw/net/allwinner_emac.h
+++ b/include/hw/net/allwinner_emac.h
@@ -31,9 +31,7 @@
 #include "qom/object.h"
 
 #define TYPE_AW_EMAC "allwinner-emac"
-typedef struct AwEmacState AwEmacState;
-DECLARE_INSTANCE_CHECKER(AwEmacState, AW_EMAC,
-                         TYPE_AW_EMAC)
+OBJECT_DECLARE_SIMPLE_TYPE(AwEmacState, AW_EMAC)
 
 /*
  * Allwinner EMAC register list
diff --git a/include/hw/net/cadence_gem.h b/include/hw/net/cadence_gem.h
index 89d2dab..91ebb5c 100644
--- a/include/hw/net/cadence_gem.h
+++ b/include/hw/net/cadence_gem.h
@@ -27,9 +27,7 @@
 #include "qom/object.h"
 
 #define TYPE_CADENCE_GEM "cadence_gem"
-typedef struct CadenceGEMState CadenceGEMState;
-DECLARE_INSTANCE_CHECKER(CadenceGEMState, CADENCE_GEM,
-                         TYPE_CADENCE_GEM)
+OBJECT_DECLARE_SIMPLE_TYPE(CadenceGEMState, CADENCE_GEM)
 
 #include "net/net.h"
 #include "hw/sysbus.h"
diff --git a/include/hw/net/ftgmac100.h b/include/hw/net/ftgmac100.h
index c6b1c11..765d153 100644
--- a/include/hw/net/ftgmac100.h
+++ b/include/hw/net/ftgmac100.h
@@ -12,9 +12,7 @@
 #include "qom/object.h"
 
 #define TYPE_FTGMAC100 "ftgmac100"
-typedef struct FTGMAC100State FTGMAC100State;
-DECLARE_INSTANCE_CHECKER(FTGMAC100State, FTGMAC100,
-                         TYPE_FTGMAC100)
+OBJECT_DECLARE_SIMPLE_TYPE(FTGMAC100State, FTGMAC100)
 
 #include "hw/sysbus.h"
 #include "net/net.h"
@@ -70,9 +68,7 @@
 };
 
 #define TYPE_ASPEED_MII "aspeed-mmi"
-typedef struct AspeedMiiState AspeedMiiState;
-DECLARE_INSTANCE_CHECKER(AspeedMiiState, ASPEED_MII,
-                         TYPE_ASPEED_MII)
+OBJECT_DECLARE_SIMPLE_TYPE(AspeedMiiState, ASPEED_MII)
 
 /*
  * AST2600 MII controller
diff --git a/include/hw/net/imx_fec.h b/include/hw/net/imx_fec.h
index ffdbc30..e3a8755 100644
--- a/include/hw/net/imx_fec.h
+++ b/include/hw/net/imx_fec.h
@@ -26,9 +26,7 @@
 #include "qom/object.h"
 
 #define TYPE_IMX_FEC "imx.fec"
-typedef struct IMXFECState IMXFECState;
-DECLARE_INSTANCE_CHECKER(IMXFECState, IMX_FEC,
-                         TYPE_IMX_FEC)
+OBJECT_DECLARE_SIMPLE_TYPE(IMXFECState, IMX_FEC)
 
 #define TYPE_IMX_ENET "imx.enet"
 
diff --git a/include/hw/net/msf2-emac.h b/include/hw/net/msf2-emac.h
index 68194d7..846ba6e 100644
--- a/include/hw/net/msf2-emac.h
+++ b/include/hw/net/msf2-emac.h
@@ -29,9 +29,7 @@
 #include "qom/object.h"
 
 #define TYPE_MSS_EMAC "msf2-emac"
-typedef struct MSF2EmacState MSF2EmacState;
-DECLARE_INSTANCE_CHECKER(MSF2EmacState, MSS_EMAC,
-                         TYPE_MSS_EMAC)
+OBJECT_DECLARE_SIMPLE_TYPE(MSF2EmacState, MSS_EMAC)
 
 #define R_MAX         (0x1a0 / 4)
 #define PHY_MAX_REGS  32
diff --git a/include/hw/nubus/mac-nubus-bridge.h b/include/hw/nubus/mac-nubus-bridge.h
index 6856d7e..36aa098 100644
--- a/include/hw/nubus/mac-nubus-bridge.h
+++ b/include/hw/nubus/mac-nubus-bridge.h
@@ -13,9 +13,7 @@
 #include "qom/object.h"
 
 #define TYPE_MAC_NUBUS_BRIDGE "mac-nubus-bridge"
-typedef struct MacNubusState MacNubusState;
-DECLARE_INSTANCE_CHECKER(MacNubusState, MAC_NUBUS_BRIDGE,
-                         TYPE_MAC_NUBUS_BRIDGE)
+OBJECT_DECLARE_SIMPLE_TYPE(MacNubusState, MAC_NUBUS_BRIDGE)
 
 struct MacNubusState {
     SysBusDevice sysbus_dev;
diff --git a/include/hw/nubus/nubus.h b/include/hw/nubus/nubus.h
index 9370f0d..e2b5cf2 100644
--- a/include/hw/nubus/nubus.h
+++ b/include/hw/nubus/nubus.h
@@ -23,14 +23,10 @@
 #define NUBUS_LAST_SLOT       0xF
 
 #define TYPE_NUBUS_DEVICE "nubus-device"
-typedef struct NubusDevice NubusDevice;
-DECLARE_INSTANCE_CHECKER(NubusDevice, NUBUS_DEVICE,
-                         TYPE_NUBUS_DEVICE)
+OBJECT_DECLARE_SIMPLE_TYPE(NubusDevice, NUBUS_DEVICE)
 
 #define TYPE_NUBUS_BUS "nubus-bus"
-typedef struct NubusBus NubusBus;
-DECLARE_INSTANCE_CHECKER(NubusBus, NUBUS_BUS,
-                         TYPE_NUBUS_BUS)
+OBJECT_DECLARE_SIMPLE_TYPE(NubusBus, NUBUS_BUS)
 
 #define TYPE_NUBUS_BRIDGE "nubus-bridge"
 
diff --git a/include/hw/nvram/fw_cfg.h b/include/hw/nvram/fw_cfg.h
index f853934..8a9f573 100644
--- a/include/hw/nvram/fw_cfg.h
+++ b/include/hw/nvram/fw_cfg.h
@@ -12,12 +12,9 @@
 #define TYPE_FW_CFG_MEM "fw_cfg_mem"
 #define TYPE_FW_CFG_DATA_GENERATOR_INTERFACE "fw_cfg-data-generator"
 
-DECLARE_INSTANCE_CHECKER(FWCfgState, FW_CFG,
-                         TYPE_FW_CFG)
-DECLARE_INSTANCE_CHECKER(FWCfgIoState, FW_CFG_IO,
-                         TYPE_FW_CFG_IO)
-DECLARE_INSTANCE_CHECKER(FWCfgMemState, FW_CFG_MEM,
-                         TYPE_FW_CFG_MEM)
+OBJECT_DECLARE_SIMPLE_TYPE(FWCfgState, FW_CFG)
+OBJECT_DECLARE_SIMPLE_TYPE(FWCfgIoState, FW_CFG_IO)
+OBJECT_DECLARE_SIMPLE_TYPE(FWCfgMemState, FW_CFG_MEM)
 
 typedef struct FWCfgDataGeneratorClass FWCfgDataGeneratorClass;
 DECLARE_CLASS_CHECKERS(FWCfgDataGeneratorClass, FW_CFG_DATA_GENERATOR,
diff --git a/include/hw/nvram/nrf51_nvm.h b/include/hw/nvram/nrf51_nvm.h
index ab99b09..d85e788 100644
--- a/include/hw/nvram/nrf51_nvm.h
+++ b/include/hw/nvram/nrf51_nvm.h
@@ -25,9 +25,7 @@
 #include "hw/sysbus.h"
 #include "qom/object.h"
 #define TYPE_NRF51_NVM "nrf51_soc.nvm"
-typedef struct NRF51NVMState NRF51NVMState;
-DECLARE_INSTANCE_CHECKER(NRF51NVMState, NRF51_NVM,
-                         TYPE_NRF51_NVM)
+OBJECT_DECLARE_SIMPLE_TYPE(NRF51NVMState, NRF51_NVM)
 
 #define NRF51_UICR_FIXTURE_SIZE 64
 
diff --git a/include/hw/pci-bridge/simba.h b/include/hw/pci-bridge/simba.h
index 675aa5a..979cb17 100644
--- a/include/hw/pci-bridge/simba.h
+++ b/include/hw/pci-bridge/simba.h
@@ -35,10 +35,8 @@
     /*< private >*/
     PCIBridge parent_obj;
 };
-typedef struct SimbaPCIBridge SimbaPCIBridge;
 
 #define TYPE_SIMBA_PCI_BRIDGE "pbm-bridge"
-DECLARE_INSTANCE_CHECKER(SimbaPCIBridge, SIMBA_PCI_BRIDGE,
-                         TYPE_SIMBA_PCI_BRIDGE)
+OBJECT_DECLARE_SIMPLE_TYPE(SimbaPCIBridge, SIMBA_PCI_BRIDGE)
 
 #endif
diff --git a/include/hw/pci-host/designware.h b/include/hw/pci-host/designware.h
index 551eec3..79869c7 100644
--- a/include/hw/pci-host/designware.h
+++ b/include/hw/pci-host/designware.h
@@ -29,14 +29,10 @@
 #include "qom/object.h"
 
 #define TYPE_DESIGNWARE_PCIE_HOST "designware-pcie-host"
-typedef struct DesignwarePCIEHost DesignwarePCIEHost;
-DECLARE_INSTANCE_CHECKER(DesignwarePCIEHost, DESIGNWARE_PCIE_HOST,
-                         TYPE_DESIGNWARE_PCIE_HOST)
+OBJECT_DECLARE_SIMPLE_TYPE(DesignwarePCIEHost, DESIGNWARE_PCIE_HOST)
 
 #define TYPE_DESIGNWARE_PCIE_ROOT "designware-pcie-root"
-typedef struct DesignwarePCIERoot DesignwarePCIERoot;
-DECLARE_INSTANCE_CHECKER(DesignwarePCIERoot, DESIGNWARE_PCIE_ROOT,
-                         TYPE_DESIGNWARE_PCIE_ROOT)
+OBJECT_DECLARE_SIMPLE_TYPE(DesignwarePCIERoot, DESIGNWARE_PCIE_ROOT)
 
 struct DesignwarePCIERoot;
 
diff --git a/include/hw/pci-host/gpex.h b/include/hw/pci-host/gpex.h
index 2f4e852..7abdb8b 100644
--- a/include/hw/pci-host/gpex.h
+++ b/include/hw/pci-host/gpex.h
@@ -26,14 +26,10 @@
 #include "qom/object.h"
 
 #define TYPE_GPEX_HOST "gpex-pcihost"
-typedef struct GPEXHost GPEXHost;
-DECLARE_INSTANCE_CHECKER(GPEXHost, GPEX_HOST,
-                         TYPE_GPEX_HOST)
+OBJECT_DECLARE_SIMPLE_TYPE(GPEXHost, GPEX_HOST)
 
 #define TYPE_GPEX_ROOT_DEVICE "gpex-root"
-typedef struct GPEXRootState GPEXRootState;
-DECLARE_INSTANCE_CHECKER(GPEXRootState, GPEX_ROOT_DEVICE,
-                         TYPE_GPEX_ROOT_DEVICE)
+OBJECT_DECLARE_SIMPLE_TYPE(GPEXRootState, GPEX_ROOT_DEVICE)
 
 #define GPEX_NUM_IRQS 4
 
diff --git a/include/hw/pci-host/i440fx.h b/include/hw/pci-host/i440fx.h
index 046c645..6c16eaf 100644
--- a/include/hw/pci-host/i440fx.h
+++ b/include/hw/pci-host/i440fx.h
@@ -19,9 +19,7 @@
 #define TYPE_I440FX_PCI_HOST_BRIDGE "i440FX-pcihost"
 #define TYPE_I440FX_PCI_DEVICE "i440FX"
 
-typedef struct PCII440FXState PCII440FXState;
-DECLARE_INSTANCE_CHECKER(PCII440FXState, I440FX_PCI_DEVICE,
-                         TYPE_I440FX_PCI_DEVICE)
+OBJECT_DECLARE_SIMPLE_TYPE(PCII440FXState, I440FX_PCI_DEVICE)
 
 struct PCII440FXState {
     /*< private >*/
diff --git a/include/hw/pci-host/pnv_phb3.h b/include/hw/pci-host/pnv_phb3.h
index 182f29d..e2a2e36 100644
--- a/include/hw/pci-host/pnv_phb3.h
+++ b/include/hw/pci-host/pnv_phb3.h
@@ -72,9 +72,7 @@
  * PHB3 Power Bus Common Queue
  */
 #define TYPE_PNV_PBCQ "pnv-pbcq"
-typedef struct PnvPBCQState PnvPBCQState;
-DECLARE_INSTANCE_CHECKER(PnvPBCQState, PNV_PBCQ,
-                         TYPE_PNV_PBCQ)
+OBJECT_DECLARE_SIMPLE_TYPE(PnvPBCQState, PNV_PBCQ)
 
 struct PnvPBCQState {
     DeviceState parent;
@@ -118,8 +116,7 @@
  * PHB3 PCIe Host Bridge for PowerNV machines (POWER8)
  */
 #define TYPE_PNV_PHB3 "pnv-phb3"
-DECLARE_INSTANCE_CHECKER(PnvPHB3, PNV_PHB3,
-                         TYPE_PNV_PHB3)
+OBJECT_DECLARE_SIMPLE_TYPE(PnvPHB3, PNV_PHB3)
 
 #define PNV_PHB3_NUM_M64      16
 #define PNV_PHB3_NUM_REGS     (0x1000 >> 3)
diff --git a/include/hw/pci-host/pnv_phb4.h b/include/hw/pci-host/pnv_phb4.h
index 05efb4e..27556ae 100644
--- a/include/hw/pci-host/pnv_phb4.h
+++ b/include/hw/pci-host/pnv_phb4.h
@@ -57,8 +57,7 @@
  * PHB4 PCIe Host Bridge for PowerNV machines (POWER9)
  */
 #define TYPE_PNV_PHB4 "pnv-phb4"
-DECLARE_INSTANCE_CHECKER(PnvPHB4, PNV_PHB4,
-                         TYPE_PNV_PHB4)
+OBJECT_DECLARE_SIMPLE_TYPE(PnvPHB4, PNV_PHB4)
 
 #define PNV_PHB4_MAX_LSIs          8
 #define PNV_PHB4_MAX_INTs          4096
@@ -144,8 +143,7 @@
 OBJECT_DECLARE_TYPE(PnvPhb4PecState, PnvPhb4PecClass, PNV_PHB4_PEC)
 
 #define TYPE_PNV_PHB4_PEC_STACK "pnv-phb4-pec-stack"
-DECLARE_INSTANCE_CHECKER(PnvPhb4PecStack, PNV_PHB4_PEC_STACK,
-                         TYPE_PNV_PHB4_PEC_STACK)
+OBJECT_DECLARE_SIMPLE_TYPE(PnvPhb4PecStack, PNV_PHB4_PEC_STACK)
 
 /* Per-stack data */
 struct PnvPhb4PecStack {
diff --git a/include/hw/pci-host/q35.h b/include/hw/pci-host/q35.h
index 0f5a534..bbb9581 100644
--- a/include/hw/pci-host/q35.h
+++ b/include/hw/pci-host/q35.h
@@ -30,14 +30,10 @@
 #include "qom/object.h"
 
 #define TYPE_Q35_HOST_DEVICE "q35-pcihost"
-typedef struct Q35PCIHost Q35PCIHost;
-DECLARE_INSTANCE_CHECKER(Q35PCIHost, Q35_HOST_DEVICE,
-                         TYPE_Q35_HOST_DEVICE)
+OBJECT_DECLARE_SIMPLE_TYPE(Q35PCIHost, Q35_HOST_DEVICE)
 
 #define TYPE_MCH_PCI_DEVICE "mch"
-typedef struct MCHPCIState MCHPCIState;
-DECLARE_INSTANCE_CHECKER(MCHPCIState, MCH_PCI_DEVICE,
-                         TYPE_MCH_PCI_DEVICE)
+OBJECT_DECLARE_SIMPLE_TYPE(MCHPCIState, MCH_PCI_DEVICE)
 
 struct MCHPCIState {
     /*< private >*/
diff --git a/include/hw/pci-host/sabre.h b/include/hw/pci-host/sabre.h
index 7a76de4..0119024 100644
--- a/include/hw/pci-host/sabre.h
+++ b/include/hw/pci-host/sabre.h
@@ -20,11 +20,9 @@
 struct SabrePCIState {
     PCIDevice parent_obj;
 };
-typedef struct SabrePCIState SabrePCIState;
 
 #define TYPE_SABRE_PCI_DEVICE "sabre-pci"
-DECLARE_INSTANCE_CHECKER(SabrePCIState, SABRE_PCI_DEVICE,
-                         TYPE_SABRE_PCI_DEVICE)
+OBJECT_DECLARE_SIMPLE_TYPE(SabrePCIState, SABRE_PCI_DEVICE)
 
 struct SabreState {
     PCIHostState parent_obj;
@@ -48,10 +46,8 @@
     uint32_t reset_control;
     unsigned int nr_resets;
 };
-typedef struct SabreState SabreState;
 
 #define TYPE_SABRE "sabre"
-DECLARE_INSTANCE_CHECKER(SabreState, SABRE,
-                         TYPE_SABRE)
+OBJECT_DECLARE_SIMPLE_TYPE(SabreState, SABRE)
 
 #endif
diff --git a/include/hw/pci-host/spapr.h b/include/hw/pci-host/spapr.h
index 0431ce1..04917f3 100644
--- a/include/hw/pci-host/spapr.h
+++ b/include/hw/pci-host/spapr.h
@@ -28,9 +28,7 @@
 
 #define TYPE_SPAPR_PCI_HOST_BRIDGE "spapr-pci-host-bridge"
 
-typedef struct SpaprPhbState SpaprPhbState;
-DECLARE_INSTANCE_CHECKER(SpaprPhbState, SPAPR_PCI_HOST_BRIDGE,
-                         TYPE_SPAPR_PCI_HOST_BRIDGE)
+OBJECT_DECLARE_SIMPLE_TYPE(SpaprPhbState, SPAPR_PCI_HOST_BRIDGE)
 
 #define SPAPR_PCI_DMA_MAX_WINDOWS    2
 
diff --git a/include/hw/pci-host/uninorth.h b/include/hw/pci-host/uninorth.h
index d10c598..a6ba5f2 100644
--- a/include/hw/pci-host/uninorth.h
+++ b/include/hw/pci-host/uninorth.h
@@ -63,10 +63,8 @@
 
     MemoryRegion mem;
 };
-typedef struct UNINState UNINState;
 
 #define TYPE_UNI_NORTH "uni-north"
-DECLARE_INSTANCE_CHECKER(UNINState, UNI_NORTH,
-                         TYPE_UNI_NORTH)
+OBJECT_DECLARE_SIMPLE_TYPE(UNINState, UNI_NORTH)
 
 #endif /* UNINORTH_H */
diff --git a/include/hw/pci-host/xilinx-pcie.h b/include/hw/pci-host/xilinx-pcie.h
index 6058c8c..f079e50 100644
--- a/include/hw/pci-host/xilinx-pcie.h
+++ b/include/hw/pci-host/xilinx-pcie.h
@@ -27,14 +27,10 @@
 #include "qom/object.h"
 
 #define TYPE_XILINX_PCIE_HOST "xilinx-pcie-host"
-typedef struct XilinxPCIEHost XilinxPCIEHost;
-DECLARE_INSTANCE_CHECKER(XilinxPCIEHost, XILINX_PCIE_HOST,
-                         TYPE_XILINX_PCIE_HOST)
+OBJECT_DECLARE_SIMPLE_TYPE(XilinxPCIEHost, XILINX_PCIE_HOST)
 
 #define TYPE_XILINX_PCIE_ROOT "xilinx-pcie-root"
-typedef struct XilinxPCIERoot XilinxPCIERoot;
-DECLARE_INSTANCE_CHECKER(XilinxPCIERoot, XILINX_PCIE_ROOT,
-                         TYPE_XILINX_PCIE_ROOT)
+OBJECT_DECLARE_SIMPLE_TYPE(XilinxPCIERoot, XILINX_PCIE_ROOT)
 
 struct XilinxPCIERoot {
     PCIBridge parent_obj;
diff --git a/include/hw/pci/pci_bridge.h b/include/hw/pci/pci_bridge.h
index 7ab1459..a94d350 100644
--- a/include/hw/pci/pci_bridge.h
+++ b/include/hw/pci/pci_bridge.h
@@ -51,8 +51,7 @@
 };
 
 #define TYPE_PCI_BRIDGE "base-pci-bridge"
-DECLARE_INSTANCE_CHECKER(PCIBridge, PCI_BRIDGE,
-                         TYPE_PCI_BRIDGE)
+OBJECT_DECLARE_SIMPLE_TYPE(PCIBridge, PCI_BRIDGE)
 
 struct PCIBridge {
     /*< private >*/
diff --git a/include/hw/pci/pcie_host.h b/include/hw/pci/pcie_host.h
index f512646..076457b 100644
--- a/include/hw/pci/pcie_host.h
+++ b/include/hw/pci/pcie_host.h
@@ -26,8 +26,7 @@
 #include "qom/object.h"
 
 #define TYPE_PCIE_HOST_BRIDGE "pcie-host-bridge"
-DECLARE_INSTANCE_CHECKER(PCIExpressHost, PCIE_HOST_BRIDGE,
-                         TYPE_PCIE_HOST_BRIDGE)
+OBJECT_DECLARE_SIMPLE_TYPE(PCIExpressHost, PCIE_HOST_BRIDGE)
 
 #define PCIE_HOST_MCFG_BASE "MCFG"
 #define PCIE_HOST_MCFG_SIZE "mcfg_size"
diff --git a/include/hw/pci/pcie_port.h b/include/hw/pci/pcie_port.h
index 2463c07..bea8eca 100644
--- a/include/hw/pci/pcie_port.h
+++ b/include/hw/pci/pcie_port.h
@@ -26,8 +26,7 @@
 #include "qom/object.h"
 
 #define TYPE_PCIE_PORT "pcie-port"
-DECLARE_INSTANCE_CHECKER(PCIEPort, PCIE_PORT,
-                         TYPE_PCIE_PORT)
+OBJECT_DECLARE_SIMPLE_TYPE(PCIEPort, PCIE_PORT)
 
 struct PCIEPort {
     /*< private >*/
@@ -41,8 +40,7 @@
 void pcie_port_init_reg(PCIDevice *d);
 
 #define TYPE_PCIE_SLOT "pcie-slot"
-DECLARE_INSTANCE_CHECKER(PCIESlot, PCIE_SLOT,
-                         TYPE_PCIE_SLOT)
+OBJECT_DECLARE_SIMPLE_TYPE(PCIESlot, PCIE_SLOT)
 
 struct PCIESlot {
     /*< private >*/
diff --git a/include/hw/platform-bus.h b/include/hw/platform-bus.h
index 0d035e1..1f3d1ce 100644
--- a/include/hw/platform-bus.h
+++ b/include/hw/platform-bus.h
@@ -25,11 +25,9 @@
 #include "hw/sysbus.h"
 #include "qom/object.h"
 
-typedef struct PlatformBusDevice PlatformBusDevice;
 
 #define TYPE_PLATFORM_BUS_DEVICE "platform-bus-device"
-DECLARE_INSTANCE_CHECKER(PlatformBusDevice, PLATFORM_BUS_DEVICE,
-                         TYPE_PLATFORM_BUS_DEVICE)
+OBJECT_DECLARE_SIMPLE_TYPE(PlatformBusDevice, PLATFORM_BUS_DEVICE)
 
 struct PlatformBusDevice {
     /*< private >*/
diff --git a/include/hw/ppc/mac_dbdma.h b/include/hw/ppc/mac_dbdma.h
index 9166d5f..4a3f644 100644
--- a/include/hw/ppc/mac_dbdma.h
+++ b/include/hw/ppc/mac_dbdma.h
@@ -178,7 +178,6 @@
 void DBDMA_kick(DBDMAState *dbdma);
 
 #define TYPE_MAC_DBDMA "mac-dbdma"
-DECLARE_INSTANCE_CHECKER(DBDMAState, MAC_DBDMA,
-                         TYPE_MAC_DBDMA)
+OBJECT_DECLARE_SIMPLE_TYPE(DBDMAState, MAC_DBDMA)
 
 #endif
diff --git a/include/hw/ppc/openpic.h b/include/hw/ppc/openpic.h
index 61908c7..74ff44b 100644
--- a/include/hw/ppc/openpic.h
+++ b/include/hw/ppc/openpic.h
@@ -137,9 +137,7 @@
 } IRQDest;
 
 #define TYPE_OPENPIC "openpic"
-typedef struct OpenPICState OpenPICState;
-DECLARE_INSTANCE_CHECKER(OpenPICState, OPENPIC,
-                         TYPE_OPENPIC)
+OBJECT_DECLARE_SIMPLE_TYPE(OpenPICState, OPENPIC)
 
 struct OpenPICState {
     /*< private >*/
diff --git a/include/hw/ppc/pnv_core.h b/include/hw/ppc/pnv_core.h
index fc11ede..f15829d 100644
--- a/include/hw/ppc/pnv_core.h
+++ b/include/hw/ppc/pnv_core.h
@@ -62,9 +62,7 @@
 }
 
 #define TYPE_PNV_QUAD "powernv-cpu-quad"
-typedef struct PnvQuad PnvQuad;
-DECLARE_INSTANCE_CHECKER(PnvQuad, PNV_QUAD,
-                         TYPE_PNV_QUAD)
+OBJECT_DECLARE_SIMPLE_TYPE(PnvQuad, PNV_QUAD)
 
 struct PnvQuad {
     DeviceState parent_obj;
diff --git a/include/hw/ppc/pnv_pnor.h b/include/hw/ppc/pnv_pnor.h
index 1ec4098..99f9a3a 100644
--- a/include/hw/ppc/pnv_pnor.h
+++ b/include/hw/ppc/pnv_pnor.h
@@ -16,9 +16,7 @@
 #define PNOR_SPI_OFFSET         0x0c000000UL
 
 #define TYPE_PNV_PNOR  "pnv-pnor"
-typedef struct PnvPnor PnvPnor;
-DECLARE_INSTANCE_CHECKER(PnvPnor, PNV_PNOR,
-                         TYPE_PNV_PNOR)
+OBJECT_DECLARE_SIMPLE_TYPE(PnvPnor, PNV_PNOR)
 
 struct PnvPnor {
     SysBusDevice   parent_obj;
diff --git a/include/hw/ppc/pnv_psi.h b/include/hw/ppc/pnv_psi.h
index a1fe25b..682b09f 100644
--- a/include/hw/ppc/pnv_psi.h
+++ b/include/hw/ppc/pnv_psi.h
@@ -51,9 +51,7 @@
 };
 
 #define TYPE_PNV8_PSI TYPE_PNV_PSI "-POWER8"
-typedef struct Pnv8Psi Pnv8Psi;
-DECLARE_INSTANCE_CHECKER(Pnv8Psi, PNV8_PSI,
-                         TYPE_PNV8_PSI)
+OBJECT_DECLARE_SIMPLE_TYPE(Pnv8Psi, PNV8_PSI)
 
 struct Pnv8Psi {
     PnvPsi   parent;
@@ -62,9 +60,7 @@
 };
 
 #define TYPE_PNV9_PSI TYPE_PNV_PSI "-POWER9"
-typedef struct Pnv9Psi Pnv9Psi;
-DECLARE_INSTANCE_CHECKER(Pnv9Psi, PNV9_PSI,
-                         TYPE_PNV9_PSI)
+OBJECT_DECLARE_SIMPLE_TYPE(Pnv9Psi, PNV9_PSI)
 
 struct Pnv9Psi {
     PnvPsi   parent;
diff --git a/include/hw/ppc/spapr.h b/include/hw/ppc/spapr.h
index eea7ac8..194f3b9 100644
--- a/include/hw/ppc/spapr.h
+++ b/include/hw/ppc/spapr.h
@@ -28,9 +28,7 @@
 
 #define TYPE_SPAPR_RTC "spapr-rtc"
 
-typedef struct SpaprRtcState SpaprRtcState;
-DECLARE_INSTANCE_CHECKER(SpaprRtcState, SPAPR_RTC,
-                         TYPE_SPAPR_RTC)
+OBJECT_DECLARE_SIMPLE_TYPE(SpaprRtcState, SPAPR_RTC)
 
 struct SpaprRtcState {
     /*< private >*/
@@ -781,11 +779,9 @@
     intspec[1] = is_lsi ? cpu_to_be32(1) : 0;
 }
 
-typedef struct SpaprTceTable SpaprTceTable;
 
 #define TYPE_SPAPR_TCE_TABLE "spapr-tce-table"
-DECLARE_INSTANCE_CHECKER(SpaprTceTable, SPAPR_TCE_TABLE,
-                         TYPE_SPAPR_TCE_TABLE)
+OBJECT_DECLARE_SIMPLE_TYPE(SpaprTceTable, SPAPR_TCE_TABLE)
 
 #define TYPE_SPAPR_IOMMU_MEMORY_REGION "spapr-iommu-memory-region"
 DECLARE_INSTANCE_CHECKER(IOMMUMemoryRegion, SPAPR_IOMMU_MEMORY_REGION,
diff --git a/include/hw/ppc/spapr_tpm_proxy.h b/include/hw/ppc/spapr_tpm_proxy.h
index 300c81b..96d2a96 100644
--- a/include/hw/ppc/spapr_tpm_proxy.h
+++ b/include/hw/ppc/spapr_tpm_proxy.h
@@ -17,9 +17,7 @@
 #include "hw/qdev-core.h"
 
 #define TYPE_SPAPR_TPM_PROXY "spapr-tpm-proxy"
-typedef struct SpaprTpmProxy SpaprTpmProxy;
-DECLARE_INSTANCE_CHECKER(SpaprTpmProxy, SPAPR_TPM_PROXY,
-                         TYPE_SPAPR_TPM_PROXY)
+OBJECT_DECLARE_SIMPLE_TYPE(SpaprTpmProxy, SPAPR_TPM_PROXY)
 
 struct SpaprTpmProxy {
     /*< private >*/
diff --git a/include/hw/ppc/spapr_vio.h b/include/hw/ppc/spapr_vio.h
index aae03ea..356751e 100644
--- a/include/hw/ppc/spapr_vio.h
+++ b/include/hw/ppc/spapr_vio.h
@@ -32,9 +32,7 @@
                     VIO_SPAPR_DEVICE)
 
 #define TYPE_SPAPR_VIO_BUS "spapr-vio-bus"
-typedef struct SpaprVioBus SpaprVioBus;
-DECLARE_INSTANCE_CHECKER(SpaprVioBus, SPAPR_VIO_BUS,
-                         TYPE_SPAPR_VIO_BUS)
+OBJECT_DECLARE_SIMPLE_TYPE(SpaprVioBus, SPAPR_VIO_BUS)
 
 #define TYPE_SPAPR_VIO_BRIDGE "spapr-vio-bridge"
 
diff --git a/include/hw/ppc/xive.h b/include/hw/ppc/xive.h
index 26771bb..445eccf 100644
--- a/include/hw/ppc/xive.h
+++ b/include/hw/ppc/xive.h
@@ -168,9 +168,7 @@
  */
 
 #define TYPE_XIVE_SOURCE "xive-source"
-typedef struct XiveSource XiveSource;
-DECLARE_INSTANCE_CHECKER(XiveSource, XIVE_SOURCE,
-                         TYPE_XIVE_SOURCE)
+OBJECT_DECLARE_SIMPLE_TYPE(XiveSource, XIVE_SOURCE)
 
 /*
  * XIVE Interrupt Source characteristics, which define how the ESB are
@@ -306,9 +304,7 @@
  */
 
 #define TYPE_XIVE_TCTX "xive-tctx"
-typedef struct XiveTCTX XiveTCTX;
-DECLARE_INSTANCE_CHECKER(XiveTCTX, XIVE_TCTX,
-                         TYPE_XIVE_TCTX)
+OBJECT_DECLARE_SIMPLE_TYPE(XiveTCTX, XIVE_TCTX)
 
 /*
  * XIVE Thread interrupt Management register rings :
@@ -433,9 +429,7 @@
  */
 
 #define TYPE_XIVE_END_SOURCE "xive-end-source"
-typedef struct XiveENDSource XiveENDSource;
-DECLARE_INSTANCE_CHECKER(XiveENDSource, XIVE_END_SOURCE,
-                         TYPE_XIVE_END_SOURCE)
+OBJECT_DECLARE_SIMPLE_TYPE(XiveENDSource, XIVE_END_SOURCE)
 
 struct XiveENDSource {
     DeviceState parent;
diff --git a/include/hw/riscv/opentitan.h b/include/hw/riscv/opentitan.h
index 8c15b63..5ff0c0f 100644
--- a/include/hw/riscv/opentitan.h
+++ b/include/hw/riscv/opentitan.h
@@ -25,9 +25,7 @@
 #include "qom/object.h"
 
 #define TYPE_RISCV_IBEX_SOC "riscv.lowrisc.ibex.soc"
-typedef struct LowRISCIbexSoCState LowRISCIbexSoCState;
-DECLARE_INSTANCE_CHECKER(LowRISCIbexSoCState, RISCV_IBEX_SOC,
-                         TYPE_RISCV_IBEX_SOC)
+OBJECT_DECLARE_SIMPLE_TYPE(LowRISCIbexSoCState, RISCV_IBEX_SOC)
 
 struct LowRISCIbexSoCState {
     /*< private >*/
diff --git a/include/hw/riscv/riscv_hart.h b/include/hw/riscv/riscv_hart.h
index ac2cb62..bbc21cd 100644
--- a/include/hw/riscv/riscv_hart.h
+++ b/include/hw/riscv/riscv_hart.h
@@ -27,9 +27,7 @@
 
 #define TYPE_RISCV_HART_ARRAY "riscv.hart_array"
 
-typedef struct RISCVHartArrayState RISCVHartArrayState;
-DECLARE_INSTANCE_CHECKER(RISCVHartArrayState, RISCV_HART_ARRAY,
-                         TYPE_RISCV_HART_ARRAY)
+OBJECT_DECLARE_SIMPLE_TYPE(RISCVHartArrayState, RISCV_HART_ARRAY)
 
 struct RISCVHartArrayState {
     /*< private >*/
diff --git a/include/hw/rtc/aspeed_rtc.h b/include/hw/rtc/aspeed_rtc.h
index d7691ab..df61e46 100644
--- a/include/hw/rtc/aspeed_rtc.h
+++ b/include/hw/rtc/aspeed_rtc.h
@@ -21,10 +21,8 @@
     int offset;
 
 };
-typedef struct AspeedRtcState AspeedRtcState;
 
 #define TYPE_ASPEED_RTC "aspeed.rtc"
-DECLARE_INSTANCE_CHECKER(AspeedRtcState, ASPEED_RTC,
-                         TYPE_ASPEED_RTC)
+OBJECT_DECLARE_SIMPLE_TYPE(AspeedRtcState, ASPEED_RTC)
 
 #endif /* HW_RTC_ASPEED_RTC_H */
diff --git a/include/hw/rtc/goldfish_rtc.h b/include/hw/rtc/goldfish_rtc.h
index b710c21..79ca7da 100644
--- a/include/hw/rtc/goldfish_rtc.h
+++ b/include/hw/rtc/goldfish_rtc.h
@@ -26,9 +26,7 @@
 #include "qom/object.h"
 
 #define TYPE_GOLDFISH_RTC "goldfish_rtc"
-typedef struct GoldfishRTCState GoldfishRTCState;
-DECLARE_INSTANCE_CHECKER(GoldfishRTCState, GOLDFISH_RTC,
-                         TYPE_GOLDFISH_RTC)
+OBJECT_DECLARE_SIMPLE_TYPE(GoldfishRTCState, GOLDFISH_RTC)
 
 struct GoldfishRTCState {
     SysBusDevice parent_obj;
diff --git a/include/hw/rtc/mc146818rtc.h b/include/hw/rtc/mc146818rtc.h
index e58e006..6224b52 100644
--- a/include/hw/rtc/mc146818rtc.h
+++ b/include/hw/rtc/mc146818rtc.h
@@ -16,9 +16,7 @@
 #include "qom/object.h"
 
 #define TYPE_MC146818_RTC "mc146818rtc"
-typedef struct RTCState RTCState;
-DECLARE_INSTANCE_CHECKER(RTCState, MC146818_RTC,
-                         TYPE_MC146818_RTC)
+OBJECT_DECLARE_SIMPLE_TYPE(RTCState, MC146818_RTC)
 
 struct RTCState {
     ISADevice parent_obj;
diff --git a/include/hw/rtc/pl031.h b/include/hw/rtc/pl031.h
index 3897b42..9fd4be1 100644
--- a/include/hw/rtc/pl031.h
+++ b/include/hw/rtc/pl031.h
@@ -19,9 +19,7 @@
 #include "qom/object.h"
 
 #define TYPE_PL031 "pl031"
-typedef struct PL031State PL031State;
-DECLARE_INSTANCE_CHECKER(PL031State, PL031,
-                         TYPE_PL031)
+OBJECT_DECLARE_SIMPLE_TYPE(PL031State, PL031)
 
 struct PL031State {
     SysBusDevice parent_obj;
diff --git a/include/hw/rtc/xlnx-zynqmp-rtc.h b/include/hw/rtc/xlnx-zynqmp-rtc.h
index 209de85..5f1ad0a 100644
--- a/include/hw/rtc/xlnx-zynqmp-rtc.h
+++ b/include/hw/rtc/xlnx-zynqmp-rtc.h
@@ -33,9 +33,7 @@
 
 #define TYPE_XLNX_ZYNQMP_RTC "xlnx-zynmp.rtc"
 
-typedef struct XlnxZynqMPRTC XlnxZynqMPRTC;
-DECLARE_INSTANCE_CHECKER(XlnxZynqMPRTC, XLNX_ZYNQMP_RTC,
-                         TYPE_XLNX_ZYNQMP_RTC)
+OBJECT_DECLARE_SIMPLE_TYPE(XlnxZynqMPRTC, XLNX_ZYNQMP_RTC)
 
 REG32(SET_TIME_WRITE, 0x0)
 REG32(SET_TIME_READ, 0x4)
diff --git a/include/hw/s390x/css-bridge.h b/include/hw/s390x/css-bridge.h
index 9fd4484..deb606d 100644
--- a/include/hw/s390x/css-bridge.h
+++ b/include/hw/s390x/css-bridge.h
@@ -21,21 +21,17 @@
     SysBusDevice sysbus_dev;
     bool css_dev_path;
 };
-typedef struct VirtualCssBridge VirtualCssBridge;
 
 #define TYPE_VIRTUAL_CSS_BRIDGE "virtual-css-bridge"
-DECLARE_INSTANCE_CHECKER(VirtualCssBridge, VIRTUAL_CSS_BRIDGE,
-                         TYPE_VIRTUAL_CSS_BRIDGE)
+OBJECT_DECLARE_SIMPLE_TYPE(VirtualCssBridge, VIRTUAL_CSS_BRIDGE)
 
 /* virtual css bus type */
 struct VirtualCssBus {
     BusState parent_obj;
 };
-typedef struct VirtualCssBus VirtualCssBus;
 
 #define TYPE_VIRTUAL_CSS_BUS "virtual-css-bus"
-DECLARE_INSTANCE_CHECKER(VirtualCssBus, VIRTUAL_CSS_BUS,
-                         TYPE_VIRTUAL_CSS_BUS)
+OBJECT_DECLARE_SIMPLE_TYPE(VirtualCssBus, VIRTUAL_CSS_BUS)
 VirtualCssBus *virtual_css_bus_init(void);
 
 #endif
diff --git a/include/hw/s390x/s390_flic.h b/include/hw/s390x/s390_flic.h
index 648ae79..e91b15d 100644
--- a/include/hw/s390x/s390_flic.h
+++ b/include/hw/s390x/s390_flic.h
@@ -77,9 +77,7 @@
                          TYPE_KVM_S390_FLIC)
 
 #define TYPE_QEMU_S390_FLIC "s390-flic-qemu"
-typedef struct QEMUS390FLICState QEMUS390FLICState;
-DECLARE_INSTANCE_CHECKER(QEMUS390FLICState, QEMU_S390_FLIC,
-                         TYPE_QEMU_S390_FLIC)
+OBJECT_DECLARE_SIMPLE_TYPE(QEMUS390FLICState, QEMU_S390_FLIC)
 
 #define SIC_IRQ_MODE_ALL 0
 #define SIC_IRQ_MODE_SINGLE 1
diff --git a/include/hw/s390x/vfio-ccw.h b/include/hw/s390x/vfio-ccw.h
index 9c9c894..63a909e 100644
--- a/include/hw/s390x/vfio-ccw.h
+++ b/include/hw/s390x/vfio-ccw.h
@@ -20,9 +20,7 @@
 #include "qom/object.h"
 
 #define TYPE_VFIO_CCW "vfio-ccw"
-typedef struct VFIOCCWDevice VFIOCCWDevice;
-DECLARE_INSTANCE_CHECKER(VFIOCCWDevice, VFIO_CCW,
-                         TYPE_VFIO_CCW)
+OBJECT_DECLARE_SIMPLE_TYPE(VFIOCCWDevice, VFIO_CCW)
 
 #define TYPE_VFIO_CCW "vfio-ccw"
 
diff --git a/include/hw/scsi/esp.h b/include/hw/scsi/esp.h
index 20800db..60cc304 100644
--- a/include/hw/scsi/esp.h
+++ b/include/hw/scsi/esp.h
@@ -66,9 +66,7 @@
 };
 
 #define TYPE_ESP "esp"
-typedef struct SysBusESPState SysBusESPState;
-DECLARE_INSTANCE_CHECKER(SysBusESPState, ESP,
-                         TYPE_ESP)
+OBJECT_DECLARE_SIMPLE_TYPE(SysBusESPState, ESP)
 
 struct SysBusESPState {
     /*< private >*/
diff --git a/include/hw/scsi/scsi.h b/include/hw/scsi/scsi.h
index b1e2ed7..7a55cdb 100644
--- a/include/hw/scsi/scsi.h
+++ b/include/hw/scsi/scsi.h
@@ -132,8 +132,7 @@
 };
 
 #define TYPE_SCSI_BUS "SCSI"
-DECLARE_INSTANCE_CHECKER(SCSIBus, SCSI_BUS,
-                         TYPE_SCSI_BUS)
+OBJECT_DECLARE_SIMPLE_TYPE(SCSIBus, SCSI_BUS)
 
 struct SCSIBus {
     BusState qbus;
diff --git a/include/hw/sd/aspeed_sdhci.h b/include/hw/sd/aspeed_sdhci.h
index 783ccc2..b093d1b 100644
--- a/include/hw/sd/aspeed_sdhci.h
+++ b/include/hw/sd/aspeed_sdhci.h
@@ -13,9 +13,7 @@
 #include "qom/object.h"
 
 #define TYPE_ASPEED_SDHCI "aspeed.sdhci"
-typedef struct AspeedSDHCIState AspeedSDHCIState;
-DECLARE_INSTANCE_CHECKER(AspeedSDHCIState, ASPEED_SDHCI,
-                         TYPE_ASPEED_SDHCI)
+OBJECT_DECLARE_SIMPLE_TYPE(AspeedSDHCIState, ASPEED_SDHCI)
 
 #define ASPEED_SDHCI_CAPABILITIES 0x01E80080
 #define ASPEED_SDHCI_NUM_SLOTS    2
diff --git a/include/hw/sd/bcm2835_sdhost.h b/include/hw/sd/bcm2835_sdhost.h
index 751ba53..f6bca5c 100644
--- a/include/hw/sd/bcm2835_sdhost.h
+++ b/include/hw/sd/bcm2835_sdhost.h
@@ -19,9 +19,7 @@
 #include "qom/object.h"
 
 #define TYPE_BCM2835_SDHOST "bcm2835-sdhost"
-typedef struct BCM2835SDHostState BCM2835SDHostState;
-DECLARE_INSTANCE_CHECKER(BCM2835SDHostState, BCM2835_SDHOST,
-                         TYPE_BCM2835_SDHOST)
+OBJECT_DECLARE_SIMPLE_TYPE(BCM2835SDHostState, BCM2835_SDHOST)
 
 #define BCM2835_SDHOST_FIFO_LEN 16
 
diff --git a/include/hw/sparc/sparc32_dma.h b/include/hw/sparc/sparc32_dma.h
index a402665..e650489 100644
--- a/include/hw/sparc/sparc32_dma.h
+++ b/include/hw/sparc/sparc32_dma.h
@@ -9,9 +9,7 @@
 #define DMA_REGS 4
 
 #define TYPE_SPARC32_DMA_DEVICE "sparc32-dma-device"
-typedef struct DMADeviceState DMADeviceState;
-DECLARE_INSTANCE_CHECKER(DMADeviceState, SPARC32_DMA_DEVICE,
-                         TYPE_SPARC32_DMA_DEVICE)
+OBJECT_DECLARE_SIMPLE_TYPE(DMADeviceState, SPARC32_DMA_DEVICE)
 
 
 struct DMADeviceState {
@@ -25,9 +23,7 @@
 };
 
 #define TYPE_SPARC32_ESPDMA_DEVICE "sparc32-espdma"
-typedef struct ESPDMADeviceState ESPDMADeviceState;
-DECLARE_INSTANCE_CHECKER(ESPDMADeviceState, SPARC32_ESPDMA_DEVICE,
-                         TYPE_SPARC32_ESPDMA_DEVICE)
+OBJECT_DECLARE_SIMPLE_TYPE(ESPDMADeviceState, SPARC32_ESPDMA_DEVICE)
 
 struct ESPDMADeviceState {
     DMADeviceState parent_obj;
@@ -36,9 +32,7 @@
 };
 
 #define TYPE_SPARC32_LEDMA_DEVICE "sparc32-ledma"
-typedef struct LEDMADeviceState LEDMADeviceState;
-DECLARE_INSTANCE_CHECKER(LEDMADeviceState, SPARC32_LEDMA_DEVICE,
-                         TYPE_SPARC32_LEDMA_DEVICE)
+OBJECT_DECLARE_SIMPLE_TYPE(LEDMADeviceState, SPARC32_LEDMA_DEVICE)
 
 struct LEDMADeviceState {
     DMADeviceState parent_obj;
@@ -47,9 +41,7 @@
 };
 
 #define TYPE_SPARC32_DMA "sparc32-dma"
-typedef struct SPARC32DMAState SPARC32DMAState;
-DECLARE_INSTANCE_CHECKER(SPARC32DMAState, SPARC32_DMA,
-                         TYPE_SPARC32_DMA)
+OBJECT_DECLARE_SIMPLE_TYPE(SPARC32DMAState, SPARC32_DMA)
 
 struct SPARC32DMAState {
     SysBusDevice parent_obj;
diff --git a/include/hw/ssi/imx_spi.h b/include/hw/ssi/imx_spi.h
index 874fea4..b82b17f 100644
--- a/include/hw/ssi/imx_spi.h
+++ b/include/hw/ssi/imx_spi.h
@@ -78,9 +78,7 @@
 #define EXTRACT(value, name) extract32(value, name##_SHIFT, name##_LENGTH)
 
 #define TYPE_IMX_SPI "imx.spi"
-typedef struct IMXSPIState IMXSPIState;
-DECLARE_INSTANCE_CHECKER(IMXSPIState, IMX_SPI,
-                         TYPE_IMX_SPI)
+OBJECT_DECLARE_SIMPLE_TYPE(IMXSPIState, IMX_SPI)
 
 struct IMXSPIState {
     /* <private> */
diff --git a/include/hw/ssi/mss-spi.h b/include/hw/ssi/mss-spi.h
index 7c16cf6..ce6279c 100644
--- a/include/hw/ssi/mss-spi.h
+++ b/include/hw/ssi/mss-spi.h
@@ -31,9 +31,7 @@
 #include "qom/object.h"
 
 #define TYPE_MSS_SPI   "mss-spi"
-typedef struct MSSSpiState MSSSpiState;
-DECLARE_INSTANCE_CHECKER(MSSSpiState, MSS_SPI,
-                         TYPE_MSS_SPI)
+OBJECT_DECLARE_SIMPLE_TYPE(MSSSpiState, MSS_SPI)
 
 #define R_SPI_MAX             16
 
diff --git a/include/hw/ssi/pl022.h b/include/hw/ssi/pl022.h
index 1f5da7c..545b526 100644
--- a/include/hw/ssi/pl022.h
+++ b/include/hw/ssi/pl022.h
@@ -25,9 +25,7 @@
 #include "qom/object.h"
 
 #define TYPE_PL022 "pl022"
-typedef struct PL022State PL022State;
-DECLARE_INSTANCE_CHECKER(PL022State, PL022,
-                         TYPE_PL022)
+OBJECT_DECLARE_SIMPLE_TYPE(PL022State, PL022)
 
 struct PL022State {
     SysBusDevice parent_obj;
diff --git a/include/hw/ssi/stm32f2xx_spi.h b/include/hw/ssi/stm32f2xx_spi.h
index 4bb36d0..3683b4a 100644
--- a/include/hw/ssi/stm32f2xx_spi.h
+++ b/include/hw/ssi/stm32f2xx_spi.h
@@ -45,9 +45,7 @@
 #define STM_SPI_SR_RXNE   1
 
 #define TYPE_STM32F2XX_SPI "stm32f2xx-spi"
-typedef struct STM32F2XXSPIState STM32F2XXSPIState;
-DECLARE_INSTANCE_CHECKER(STM32F2XXSPIState, STM32F2XX_SPI,
-                         TYPE_STM32F2XX_SPI)
+OBJECT_DECLARE_SIMPLE_TYPE(STM32F2XXSPIState, STM32F2XX_SPI)
 
 struct STM32F2XXSPIState {
     /* <private> */
diff --git a/include/hw/ssi/xilinx_spips.h b/include/hw/ssi/xilinx_spips.h
index a2bf2cf..b96de21 100644
--- a/include/hw/ssi/xilinx_spips.h
+++ b/include/hw/ssi/xilinx_spips.h
@@ -120,7 +120,6 @@
     uint32_t dma_burst_size;
     uint8_t dma_buf[QSPI_DMA_MAX_BURST_SIZE];
 };
-typedef struct XlnxZynqMPQSPIPS XlnxZynqMPQSPIPS;
 
 struct XilinxSPIPSClass {
     SysBusDeviceClass parent_class;
@@ -137,10 +136,8 @@
 
 OBJECT_DECLARE_TYPE(XilinxSPIPS, XilinxSPIPSClass, XILINX_SPIPS)
 
-DECLARE_INSTANCE_CHECKER(XilinxQSPIPS, XILINX_QSPIPS,
-                         TYPE_XILINX_QSPIPS)
+OBJECT_DECLARE_SIMPLE_TYPE(XilinxQSPIPS, XILINX_QSPIPS)
 
-DECLARE_INSTANCE_CHECKER(XlnxZynqMPQSPIPS, XLNX_ZYNQMP_QSPIPS,
-                         TYPE_XLNX_ZYNQMP_QSPIPS)
+OBJECT_DECLARE_SIMPLE_TYPE(XlnxZynqMPQSPIPS, XLNX_ZYNQMP_QSPIPS)
 
 #endif /* XILINX_SPIPS_H */
diff --git a/include/hw/timer/a9gtimer.h b/include/hw/timer/a9gtimer.h
index f6fcc4b..6ae9122 100644
--- a/include/hw/timer/a9gtimer.h
+++ b/include/hw/timer/a9gtimer.h
@@ -29,9 +29,7 @@
 #define A9_GTIMER_MAX_CPUS 4
 
 #define TYPE_A9_GTIMER "arm.cortex-a9-global-timer"
-typedef struct A9GTimerState A9GTimerState;
-DECLARE_INSTANCE_CHECKER(A9GTimerState, A9_GTIMER,
-                         TYPE_A9_GTIMER)
+OBJECT_DECLARE_SIMPLE_TYPE(A9GTimerState, A9_GTIMER)
 
 #define R_COUNTER_LO                0x00
 #define R_COUNTER_HI                0x04
diff --git a/include/hw/timer/allwinner-a10-pit.h b/include/hw/timer/allwinner-a10-pit.h
index 9638e3c..8435758 100644
--- a/include/hw/timer/allwinner-a10-pit.h
+++ b/include/hw/timer/allwinner-a10-pit.h
@@ -6,9 +6,7 @@
 #include "qom/object.h"
 
 #define TYPE_AW_A10_PIT "allwinner-A10-timer"
-typedef struct AwA10PITState AwA10PITState;
-DECLARE_INSTANCE_CHECKER(AwA10PITState, AW_A10_PIT,
-                         TYPE_AW_A10_PIT)
+OBJECT_DECLARE_SIMPLE_TYPE(AwA10PITState, AW_A10_PIT)
 
 #define AW_A10_PIT_TIMER_NR    6
 #define AW_A10_PIT_TIMER_IRQ   0x1
diff --git a/include/hw/timer/arm_mptimer.h b/include/hw/timer/arm_mptimer.h
index 47d5e51..65a96e2 100644
--- a/include/hw/timer/arm_mptimer.h
+++ b/include/hw/timer/arm_mptimer.h
@@ -36,9 +36,7 @@
 } TimerBlock;
 
 #define TYPE_ARM_MPTIMER "arm_mptimer"
-typedef struct ARMMPTimerState ARMMPTimerState;
-DECLARE_INSTANCE_CHECKER(ARMMPTimerState, ARM_MPTIMER,
-                         TYPE_ARM_MPTIMER)
+OBJECT_DECLARE_SIMPLE_TYPE(ARMMPTimerState, ARM_MPTIMER)
 
 struct ARMMPTimerState {
     /*< private >*/
diff --git a/include/hw/timer/armv7m_systick.h b/include/hw/timer/armv7m_systick.h
index b605688..97cb345 100644
--- a/include/hw/timer/armv7m_systick.h
+++ b/include/hw/timer/armv7m_systick.h
@@ -17,9 +17,7 @@
 
 #define TYPE_SYSTICK "armv7m_systick"
 
-typedef struct SysTickState SysTickState;
-DECLARE_INSTANCE_CHECKER(SysTickState, SYSTICK,
-                         TYPE_SYSTICK)
+OBJECT_DECLARE_SIMPLE_TYPE(SysTickState, SYSTICK)
 
 struct SysTickState {
     /*< private >*/
diff --git a/include/hw/timer/avr_timer16.h b/include/hw/timer/avr_timer16.h
index d454bb3..0536254 100644
--- a/include/hw/timer/avr_timer16.h
+++ b/include/hw/timer/avr_timer16.h
@@ -42,9 +42,7 @@
 };
 
 #define TYPE_AVR_TIMER16 "avr-timer16"
-typedef struct AVRTimer16State AVRTimer16State;
-DECLARE_INSTANCE_CHECKER(AVRTimer16State, AVR_TIMER16,
-                         TYPE_AVR_TIMER16)
+OBJECT_DECLARE_SIMPLE_TYPE(AVRTimer16State, AVR_TIMER16)
 
 struct AVRTimer16State {
     /* <private> */
diff --git a/include/hw/timer/bcm2835_systmr.h b/include/hw/timer/bcm2835_systmr.h
index 64166bd..7ce8f6e 100644
--- a/include/hw/timer/bcm2835_systmr.h
+++ b/include/hw/timer/bcm2835_systmr.h
@@ -14,9 +14,7 @@
 #include "qom/object.h"
 
 #define TYPE_BCM2835_SYSTIMER "bcm2835-sys-timer"
-typedef struct BCM2835SystemTimerState BCM2835SystemTimerState;
-DECLARE_INSTANCE_CHECKER(BCM2835SystemTimerState, BCM2835_SYSTIMER,
-                         TYPE_BCM2835_SYSTIMER)
+OBJECT_DECLARE_SIMPLE_TYPE(BCM2835SystemTimerState, BCM2835_SYSTIMER)
 
 struct BCM2835SystemTimerState {
     /*< private >*/
diff --git a/include/hw/timer/cmsdk-apb-dualtimer.h b/include/hw/timer/cmsdk-apb-dualtimer.h
index 7a5b9df..08d9e6f 100644
--- a/include/hw/timer/cmsdk-apb-dualtimer.h
+++ b/include/hw/timer/cmsdk-apb-dualtimer.h
@@ -31,9 +31,7 @@
 #include "qom/object.h"
 
 #define TYPE_CMSDK_APB_DUALTIMER "cmsdk-apb-dualtimer"
-typedef struct CMSDKAPBDualTimer CMSDKAPBDualTimer;
-DECLARE_INSTANCE_CHECKER(CMSDKAPBDualTimer, CMSDK_APB_DUALTIMER,
-                         TYPE_CMSDK_APB_DUALTIMER)
+OBJECT_DECLARE_SIMPLE_TYPE(CMSDKAPBDualTimer, CMSDK_APB_DUALTIMER)
 
 
 /* One of the two identical timer modules in the dual-timer module */
diff --git a/include/hw/timer/cmsdk-apb-timer.h b/include/hw/timer/cmsdk-apb-timer.h
index 0912bc0..0d80b2a 100644
--- a/include/hw/timer/cmsdk-apb-timer.h
+++ b/include/hw/timer/cmsdk-apb-timer.h
@@ -18,9 +18,7 @@
 #include "qom/object.h"
 
 #define TYPE_CMSDK_APB_TIMER "cmsdk-apb-timer"
-typedef struct CMSDKAPBTIMER CMSDKAPBTIMER;
-DECLARE_INSTANCE_CHECKER(CMSDKAPBTIMER, CMSDK_APB_TIMER,
-                         TYPE_CMSDK_APB_TIMER)
+OBJECT_DECLARE_SIMPLE_TYPE(CMSDKAPBTIMER, CMSDK_APB_TIMER)
 
 struct CMSDKAPBTIMER {
     /*< private >*/
diff --git a/include/hw/timer/digic-timer.h b/include/hw/timer/digic-timer.h
index 84a0ef4..da82fb4 100644
--- a/include/hw/timer/digic-timer.h
+++ b/include/hw/timer/digic-timer.h
@@ -23,9 +23,7 @@
 #include "qom/object.h"
 
 #define TYPE_DIGIC_TIMER "digic-timer"
-typedef struct DigicTimerState DigicTimerState;
-DECLARE_INSTANCE_CHECKER(DigicTimerState, DIGIC_TIMER,
-                         TYPE_DIGIC_TIMER)
+OBJECT_DECLARE_SIMPLE_TYPE(DigicTimerState, DIGIC_TIMER)
 
 #define DIGIC_TIMER_CONTROL 0x00
 #define DIGIC_TIMER_CONTROL_RST 0x80000000
diff --git a/include/hw/timer/imx_epit.h b/include/hw/timer/imx_epit.h
index 39bcf81..2acc41e 100644
--- a/include/hw/timer/imx_epit.h
+++ b/include/hw/timer/imx_epit.h
@@ -56,9 +56,7 @@
 #define EPIT_TIMER_MAX  0XFFFFFFFFUL
 
 #define TYPE_IMX_EPIT "imx.epit"
-typedef struct IMXEPITState IMXEPITState;
-DECLARE_INSTANCE_CHECKER(IMXEPITState, IMX_EPIT,
-                         TYPE_IMX_EPIT)
+OBJECT_DECLARE_SIMPLE_TYPE(IMXEPITState, IMX_EPIT)
 
 struct IMXEPITState {
     /*< private >*/
diff --git a/include/hw/timer/mss-timer.h b/include/hw/timer/mss-timer.h
index d207bae..da38512 100644
--- a/include/hw/timer/mss-timer.h
+++ b/include/hw/timer/mss-timer.h
@@ -30,9 +30,7 @@
 #include "qom/object.h"
 
 #define TYPE_MSS_TIMER     "mss-timer"
-typedef struct MSSTimerState MSSTimerState;
-DECLARE_INSTANCE_CHECKER(MSSTimerState, MSS_TIMER,
-                         TYPE_MSS_TIMER)
+OBJECT_DECLARE_SIMPLE_TYPE(MSSTimerState, MSS_TIMER)
 
 /*
  * There are two 32-bit down counting timers.
diff --git a/include/hw/timer/nrf51_timer.h b/include/hw/timer/nrf51_timer.h
index 4261a03..76827c1 100644
--- a/include/hw/timer/nrf51_timer.h
+++ b/include/hw/timer/nrf51_timer.h
@@ -17,9 +17,7 @@
 #include "qemu/timer.h"
 #include "qom/object.h"
 #define TYPE_NRF51_TIMER "nrf51_soc.timer"
-typedef struct NRF51TimerState NRF51TimerState;
-DECLARE_INSTANCE_CHECKER(NRF51TimerState, NRF51_TIMER,
-                         TYPE_NRF51_TIMER)
+OBJECT_DECLARE_SIMPLE_TYPE(NRF51TimerState, NRF51_TIMER)
 
 #define NRF51_TIMER_REG_COUNT 4
 
diff --git a/include/hw/usb.h b/include/hw/usb.h
index 355745c..a70a72e 100644
--- a/include/hw/usb.h
+++ b/include/hw/usb.h
@@ -175,7 +175,6 @@
 
 #define USB_INTERFACE_INVALID         255
 
-typedef struct USBBus USBBus;
 typedef struct USBBusOps USBBusOps;
 typedef struct USBPort USBPort;
 typedef struct USBDevice USBDevice;
@@ -473,8 +472,7 @@
 /* usb-bus.c */
 
 #define TYPE_USB_BUS "usb-bus"
-DECLARE_INSTANCE_CHECKER(USBBus, USB_BUS,
-                         TYPE_USB_BUS)
+OBJECT_DECLARE_SIMPLE_TYPE(USBBus, USB_BUS)
 
 struct USBBus {
     BusState qbus;
diff --git a/include/hw/usb/chipidea.h b/include/hw/usb/chipidea.h
index f0303b8..fe4113e 100644
--- a/include/hw/usb/chipidea.h
+++ b/include/hw/usb/chipidea.h
@@ -10,10 +10,8 @@
 
     MemoryRegion iomem[3];
 };
-typedef struct ChipideaState ChipideaState;
 
 #define TYPE_CHIPIDEA "usb-chipidea"
-DECLARE_INSTANCE_CHECKER(ChipideaState, CHIPIDEA,
-                         TYPE_CHIPIDEA)
+OBJECT_DECLARE_SIMPLE_TYPE(ChipideaState, CHIPIDEA)
 
 #endif /* CHIPIDEA_H */
diff --git a/include/hw/usb/imx-usb-phy.h b/include/hw/usb/imx-usb-phy.h
index f7f92fc..d1e867b 100644
--- a/include/hw/usb/imx-usb-phy.h
+++ b/include/hw/usb/imx-usb-phy.h
@@ -39,9 +39,7 @@
 #define USBPHY_CTRL_SFTRST BIT(31)
 
 #define TYPE_IMX_USBPHY "imx.usbphy"
-typedef struct IMXUSBPHYState IMXUSBPHYState;
-DECLARE_INSTANCE_CHECKER(IMXUSBPHYState, IMX_USBPHY,
-                         TYPE_IMX_USBPHY)
+OBJECT_DECLARE_SIMPLE_TYPE(IMXUSBPHYState, IMX_USBPHY)
 
 struct IMXUSBPHYState {
     /* <private> */
diff --git a/include/hw/virtio/vhost-scsi-common.h b/include/hw/virtio/vhost-scsi-common.h
index 5f0bf73..0c8909d 100644
--- a/include/hw/virtio/vhost-scsi-common.h
+++ b/include/hw/virtio/vhost-scsi-common.h
@@ -20,9 +20,7 @@
 #include "qom/object.h"
 
 #define TYPE_VHOST_SCSI_COMMON "vhost-scsi-common"
-typedef struct VHostSCSICommon VHostSCSICommon;
-DECLARE_INSTANCE_CHECKER(VHostSCSICommon, VHOST_SCSI_COMMON,
-                         TYPE_VHOST_SCSI_COMMON)
+OBJECT_DECLARE_SIMPLE_TYPE(VHostSCSICommon, VHOST_SCSI_COMMON)
 
 struct VHostSCSICommon {
     VirtIOSCSICommon parent_obj;
diff --git a/include/hw/virtio/vhost-scsi.h b/include/hw/virtio/vhost-scsi.h
index 7a77644..7dc2bdd 100644
--- a/include/hw/virtio/vhost-scsi.h
+++ b/include/hw/virtio/vhost-scsi.h
@@ -26,9 +26,7 @@
 };
 
 #define TYPE_VHOST_SCSI "vhost-scsi"
-typedef struct VHostSCSI VHostSCSI;
-DECLARE_INSTANCE_CHECKER(VHostSCSI, VHOST_SCSI,
-                         TYPE_VHOST_SCSI)
+OBJECT_DECLARE_SIMPLE_TYPE(VHostSCSI, VHOST_SCSI)
 
 struct VHostSCSI {
     VHostSCSICommon parent_obj;
diff --git a/include/hw/virtio/vhost-user-blk.h b/include/hw/virtio/vhost-user-blk.h
index dc40ab6..f536576 100644
--- a/include/hw/virtio/vhost-user-blk.h
+++ b/include/hw/virtio/vhost-user-blk.h
@@ -23,9 +23,7 @@
 #include "qom/object.h"
 
 #define TYPE_VHOST_USER_BLK "vhost-user-blk"
-typedef struct VHostUserBlk VHostUserBlk;
-DECLARE_INSTANCE_CHECKER(VHostUserBlk, VHOST_USER_BLK,
-                         TYPE_VHOST_USER_BLK)
+OBJECT_DECLARE_SIMPLE_TYPE(VHostUserBlk, VHOST_USER_BLK)
 
 #define VHOST_USER_BLK_AUTO_NUM_QUEUES UINT16_MAX
 
diff --git a/include/hw/virtio/vhost-user-fs.h b/include/hw/virtio/vhost-user-fs.h
index 9033e6f..6985752 100644
--- a/include/hw/virtio/vhost-user-fs.h
+++ b/include/hw/virtio/vhost-user-fs.h
@@ -21,9 +21,7 @@
 #include "qom/object.h"
 
 #define TYPE_VHOST_USER_FS "vhost-user-fs-device"
-typedef struct VHostUserFS VHostUserFS;
-DECLARE_INSTANCE_CHECKER(VHostUserFS, VHOST_USER_FS,
-                         TYPE_VHOST_USER_FS)
+OBJECT_DECLARE_SIMPLE_TYPE(VHostUserFS, VHOST_USER_FS)
 
 typedef struct {
     CharBackend chardev;
diff --git a/include/hw/virtio/vhost-user-scsi.h b/include/hw/virtio/vhost-user-scsi.h
index 342d67e..521b08e 100644
--- a/include/hw/virtio/vhost-user-scsi.h
+++ b/include/hw/virtio/vhost-user-scsi.h
@@ -24,9 +24,7 @@
 #include "qom/object.h"
 
 #define TYPE_VHOST_USER_SCSI "vhost-user-scsi"
-typedef struct VHostUserSCSI VHostUserSCSI;
-DECLARE_INSTANCE_CHECKER(VHostUserSCSI, VHOST_USER_SCSI,
-                         TYPE_VHOST_USER_SCSI)
+OBJECT_DECLARE_SIMPLE_TYPE(VHostUserSCSI, VHOST_USER_SCSI)
 
 struct VHostUserSCSI {
     VHostSCSICommon parent_obj;
diff --git a/include/hw/virtio/vhost-user-vsock.h b/include/hw/virtio/vhost-user-vsock.h
index b3c40c1..4cfd558 100644
--- a/include/hw/virtio/vhost-user-vsock.h
+++ b/include/hw/virtio/vhost-user-vsock.h
@@ -17,9 +17,7 @@
 #include "qom/object.h"
 
 #define TYPE_VHOST_USER_VSOCK "vhost-user-vsock-device"
-typedef struct VHostUserVSock VHostUserVSock;
-DECLARE_INSTANCE_CHECKER(VHostUserVSock, VHOST_USER_VSOCK,
-                         TYPE_VHOST_USER_VSOCK)
+OBJECT_DECLARE_SIMPLE_TYPE(VHostUserVSock, VHOST_USER_VSOCK)
 
 typedef struct {
     CharBackend chardev;
diff --git a/include/hw/virtio/vhost-vsock-common.h b/include/hw/virtio/vhost-vsock-common.h
index 60bfb68..e412b5e 100644
--- a/include/hw/virtio/vhost-vsock-common.h
+++ b/include/hw/virtio/vhost-vsock-common.h
@@ -16,9 +16,7 @@
 #include "qom/object.h"
 
 #define TYPE_VHOST_VSOCK_COMMON "vhost-vsock-common"
-typedef struct VHostVSockCommon VHostVSockCommon;
-DECLARE_INSTANCE_CHECKER(VHostVSockCommon, VHOST_VSOCK_COMMON,
-                         TYPE_VHOST_VSOCK_COMMON)
+OBJECT_DECLARE_SIMPLE_TYPE(VHostVSockCommon, VHOST_VSOCK_COMMON)
 
 enum {
     VHOST_VSOCK_SAVEVM_VERSION = 0,
diff --git a/include/hw/virtio/vhost-vsock.h b/include/hw/virtio/vhost-vsock.h
index c561cc4..84f4e72 100644
--- a/include/hw/virtio/vhost-vsock.h
+++ b/include/hw/virtio/vhost-vsock.h
@@ -18,9 +18,7 @@
 #include "qom/object.h"
 
 #define TYPE_VHOST_VSOCK "vhost-vsock-device"
-typedef struct VHostVSock VHostVSock;
-DECLARE_INSTANCE_CHECKER(VHostVSock, VHOST_VSOCK,
-                         TYPE_VHOST_VSOCK)
+OBJECT_DECLARE_SIMPLE_TYPE(VHostVSock, VHOST_VSOCK)
 
 typedef struct {
     uint64_t guest_cid;
diff --git a/include/hw/virtio/virtio-balloon.h b/include/hw/virtio/virtio-balloon.h
index 0d08f49..5139cf8 100644
--- a/include/hw/virtio/virtio-balloon.h
+++ b/include/hw/virtio/virtio-balloon.h
@@ -21,9 +21,7 @@
 #include "qom/object.h"
 
 #define TYPE_VIRTIO_BALLOON "virtio-balloon-device"
-typedef struct VirtIOBalloon VirtIOBalloon;
-DECLARE_INSTANCE_CHECKER(VirtIOBalloon, VIRTIO_BALLOON,
-                         TYPE_VIRTIO_BALLOON)
+OBJECT_DECLARE_SIMPLE_TYPE(VirtIOBalloon, VIRTIO_BALLOON)
 
 #define VIRTIO_BALLOON_FREE_PAGE_HINT_CMD_ID_MIN 0x80000000
 
diff --git a/include/hw/virtio/virtio-blk.h b/include/hw/virtio/virtio-blk.h
index 29c9f32..5953cf8 100644
--- a/include/hw/virtio/virtio-blk.h
+++ b/include/hw/virtio/virtio-blk.h
@@ -22,9 +22,7 @@
 #include "qom/object.h"
 
 #define TYPE_VIRTIO_BLK "virtio-blk-device"
-typedef struct VirtIOBlock VirtIOBlock;
-DECLARE_INSTANCE_CHECKER(VirtIOBlock, VIRTIO_BLK,
-                         TYPE_VIRTIO_BLK)
+OBJECT_DECLARE_SIMPLE_TYPE(VirtIOBlock, VIRTIO_BLK)
 
 /* This is the last element of the write scatter-gather list */
 struct virtio_blk_inhdr
diff --git a/include/hw/virtio/virtio-crypto.h b/include/hw/virtio/virtio-crypto.h
index 7969695..a2228d7 100644
--- a/include/hw/virtio/virtio-crypto.h
+++ b/include/hw/virtio/virtio-crypto.h
@@ -32,9 +32,7 @@
 
 
 #define TYPE_VIRTIO_CRYPTO "virtio-crypto-device"
-typedef struct VirtIOCrypto VirtIOCrypto;
-DECLARE_INSTANCE_CHECKER(VirtIOCrypto, VIRTIO_CRYPTO,
-                         TYPE_VIRTIO_CRYPTO)
+OBJECT_DECLARE_SIMPLE_TYPE(VirtIOCrypto, VIRTIO_CRYPTO)
 #define VIRTIO_CRYPTO_GET_PARENT_CLASS(obj) \
         OBJECT_GET_PARENT_CLASS(obj, TYPE_VIRTIO_CRYPTO)
 
diff --git a/include/hw/virtio/virtio-gpu-pci.h b/include/hw/virtio/virtio-gpu-pci.h
index 5201792..225cbbc 100644
--- a/include/hw/virtio/virtio-gpu-pci.h
+++ b/include/hw/virtio/virtio-gpu-pci.h
@@ -18,14 +18,12 @@
 #include "hw/virtio/virtio-gpu.h"
 #include "qom/object.h"
 
-typedef struct VirtIOGPUPCIBase VirtIOGPUPCIBase;
 
 /*
  * virtio-gpu-pci-base: This extends VirtioPCIProxy.
  */
 #define TYPE_VIRTIO_GPU_PCI_BASE "virtio-gpu-pci-base"
-DECLARE_INSTANCE_CHECKER(VirtIOGPUPCIBase, VIRTIO_GPU_PCI_BASE,
-                         TYPE_VIRTIO_GPU_PCI_BASE)
+OBJECT_DECLARE_SIMPLE_TYPE(VirtIOGPUPCIBase, VIRTIO_GPU_PCI_BASE)
 
 struct VirtIOGPUPCIBase {
     VirtIOPCIProxy parent_obj;
diff --git a/include/hw/virtio/virtio-gpu.h b/include/hw/virtio/virtio-gpu.h
index 7ef4059..455e0a7 100644
--- a/include/hw/virtio/virtio-gpu.h
+++ b/include/hw/virtio/virtio-gpu.h
@@ -29,14 +29,10 @@
                     VIRTIO_GPU_BASE)
 
 #define TYPE_VIRTIO_GPU "virtio-gpu-device"
-typedef struct VirtIOGPU VirtIOGPU;
-DECLARE_INSTANCE_CHECKER(VirtIOGPU, VIRTIO_GPU,
-                         TYPE_VIRTIO_GPU)
+OBJECT_DECLARE_SIMPLE_TYPE(VirtIOGPU, VIRTIO_GPU)
 
 #define TYPE_VHOST_USER_GPU "vhost-user-gpu"
-typedef struct VhostUserGPU VhostUserGPU;
-DECLARE_INSTANCE_CHECKER(VhostUserGPU, VHOST_USER_GPU,
-                         TYPE_VHOST_USER_GPU)
+OBJECT_DECLARE_SIMPLE_TYPE(VhostUserGPU, VHOST_USER_GPU)
 
 #define VIRTIO_ID_GPU 16
 
diff --git a/include/hw/virtio/virtio-input.h b/include/hw/virtio/virtio-input.h
index 91df34b..f2da63d 100644
--- a/include/hw/virtio/virtio-input.h
+++ b/include/hw/virtio/virtio-input.h
@@ -29,23 +29,17 @@
 #define TYPE_VIRTIO_MOUSE     "virtio-mouse-device"
 #define TYPE_VIRTIO_TABLET    "virtio-tablet-device"
 
-typedef struct VirtIOInputHID VirtIOInputHID;
-DECLARE_INSTANCE_CHECKER(VirtIOInputHID, VIRTIO_INPUT_HID,
-                         TYPE_VIRTIO_INPUT_HID)
+OBJECT_DECLARE_SIMPLE_TYPE(VirtIOInputHID, VIRTIO_INPUT_HID)
 #define VIRTIO_INPUT_HID_GET_PARENT_CLASS(obj) \
         OBJECT_GET_PARENT_CLASS(obj, TYPE_VIRTIO_INPUT_HID)
 
 #define TYPE_VIRTIO_INPUT_HOST   "virtio-input-host-device"
-typedef struct VirtIOInputHost VirtIOInputHost;
-DECLARE_INSTANCE_CHECKER(VirtIOInputHost, VIRTIO_INPUT_HOST,
-                         TYPE_VIRTIO_INPUT_HOST)
+OBJECT_DECLARE_SIMPLE_TYPE(VirtIOInputHost, VIRTIO_INPUT_HOST)
 #define VIRTIO_INPUT_HOST_GET_PARENT_CLASS(obj) \
         OBJECT_GET_PARENT_CLASS(obj, TYPE_VIRTIO_INPUT_HOST)
 
 #define TYPE_VHOST_USER_INPUT   "vhost-user-input"
-typedef struct VHostUserInput VHostUserInput;
-DECLARE_INSTANCE_CHECKER(VHostUserInput, VHOST_USER_INPUT,
-                         TYPE_VHOST_USER_INPUT)
+OBJECT_DECLARE_SIMPLE_TYPE(VHostUserInput, VHOST_USER_INPUT)
 #define VHOST_USER_INPUT_GET_PARENT_CLASS(obj)             \
     OBJECT_GET_PARENT_CLASS(obj, TYPE_VHOST_USER_INPUT)
 
diff --git a/include/hw/virtio/virtio-iommu.h b/include/hw/virtio/virtio-iommu.h
index ae9dc56..273e35c 100644
--- a/include/hw/virtio/virtio-iommu.h
+++ b/include/hw/virtio/virtio-iommu.h
@@ -27,9 +27,7 @@
 
 #define TYPE_VIRTIO_IOMMU "virtio-iommu-device"
 #define TYPE_VIRTIO_IOMMU_PCI "virtio-iommu-device-base"
-typedef struct VirtIOIOMMU VirtIOIOMMU;
-DECLARE_INSTANCE_CHECKER(VirtIOIOMMU, VIRTIO_IOMMU,
-                         TYPE_VIRTIO_IOMMU)
+OBJECT_DECLARE_SIMPLE_TYPE(VirtIOIOMMU, VIRTIO_IOMMU)
 
 #define TYPE_VIRTIO_IOMMU_MEMORY_REGION "virtio-iommu-memory-region"
 
diff --git a/include/hw/virtio/virtio-mmio.h b/include/hw/virtio/virtio-mmio.h
index 6a1c2c2..d4c4c38 100644
--- a/include/hw/virtio/virtio-mmio.h
+++ b/include/hw/virtio/virtio-mmio.h
@@ -34,9 +34,7 @@
 
 /* virtio-mmio */
 #define TYPE_VIRTIO_MMIO "virtio-mmio"
-typedef struct VirtIOMMIOProxy VirtIOMMIOProxy;
-DECLARE_INSTANCE_CHECKER(VirtIOMMIOProxy, VIRTIO_MMIO,
-                         TYPE_VIRTIO_MMIO)
+OBJECT_DECLARE_SIMPLE_TYPE(VirtIOMMIOProxy, VIRTIO_MMIO)
 
 #define VIRT_MAGIC 0x74726976 /* 'virt' */
 #define VIRT_VERSION 2
diff --git a/include/hw/virtio/virtio-net.h b/include/hw/virtio/virtio-net.h
index 929ed23..f4852ac 100644
--- a/include/hw/virtio/virtio-net.h
+++ b/include/hw/virtio/virtio-net.h
@@ -22,9 +22,7 @@
 #include "qom/object.h"
 
 #define TYPE_VIRTIO_NET "virtio-net-device"
-typedef struct VirtIONet VirtIONet;
-DECLARE_INSTANCE_CHECKER(VirtIONet, VIRTIO_NET,
-                         TYPE_VIRTIO_NET)
+OBJECT_DECLARE_SIMPLE_TYPE(VirtIONet, VIRTIO_NET)
 
 #define TX_TIMER_INTERVAL 150000 /* 150 us */
 
diff --git a/include/hw/virtio/virtio-rng.h b/include/hw/virtio/virtio-rng.h
index 3671c9b..8273425 100644
--- a/include/hw/virtio/virtio-rng.h
+++ b/include/hw/virtio/virtio-rng.h
@@ -18,9 +18,7 @@
 #include "qom/object.h"
 
 #define TYPE_VIRTIO_RNG "virtio-rng-device"
-typedef struct VirtIORNG VirtIORNG;
-DECLARE_INSTANCE_CHECKER(VirtIORNG, VIRTIO_RNG,
-                         TYPE_VIRTIO_RNG)
+OBJECT_DECLARE_SIMPLE_TYPE(VirtIORNG, VIRTIO_RNG)
 #define VIRTIO_RNG_GET_PARENT_CLASS(obj) \
         OBJECT_GET_PARENT_CLASS(obj, TYPE_VIRTIO_RNG)
 
diff --git a/include/hw/virtio/virtio-scsi.h b/include/hw/virtio/virtio-scsi.h
index 9a8a06f..543681b 100644
--- a/include/hw/virtio/virtio-scsi.h
+++ b/include/hw/virtio/virtio-scsi.h
@@ -26,14 +26,10 @@
 #include "sysemu/iothread.h"
 
 #define TYPE_VIRTIO_SCSI_COMMON "virtio-scsi-common"
-typedef struct VirtIOSCSICommon VirtIOSCSICommon;
-DECLARE_INSTANCE_CHECKER(VirtIOSCSICommon, VIRTIO_SCSI_COMMON,
-                         TYPE_VIRTIO_SCSI_COMMON)
+OBJECT_DECLARE_SIMPLE_TYPE(VirtIOSCSICommon, VIRTIO_SCSI_COMMON)
 
 #define TYPE_VIRTIO_SCSI "virtio-scsi-device"
-typedef struct VirtIOSCSI VirtIOSCSI;
-DECLARE_INSTANCE_CHECKER(VirtIOSCSI, VIRTIO_SCSI,
-                         TYPE_VIRTIO_SCSI)
+OBJECT_DECLARE_SIMPLE_TYPE(VirtIOSCSI, VIRTIO_SCSI)
 
 #define VIRTIO_SCSI_MAX_CHANNEL 0
 #define VIRTIO_SCSI_MAX_TARGET  255
diff --git a/include/hw/virtio/virtio-serial.h b/include/hw/virtio/virtio-serial.h
index 1735991..d87c62e 100644
--- a/include/hw/virtio/virtio-serial.h
+++ b/include/hw/virtio/virtio-serial.h
@@ -32,9 +32,7 @@
 typedef struct VirtIOSerial VirtIOSerial;
 
 #define TYPE_VIRTIO_SERIAL_BUS "virtio-serial-bus"
-typedef struct VirtIOSerialBus VirtIOSerialBus;
-DECLARE_INSTANCE_CHECKER(VirtIOSerialBus, VIRTIO_SERIAL_BUS,
-                         TYPE_VIRTIO_SERIAL_BUS)
+OBJECT_DECLARE_SIMPLE_TYPE(VirtIOSerialBus, VIRTIO_SERIAL_BUS)
 
 
 struct VirtIOSerialPortClass {
@@ -224,7 +222,6 @@
 void virtio_serial_throttle_port(VirtIOSerialPort *port, bool throttle);
 
 #define TYPE_VIRTIO_SERIAL "virtio-serial-device"
-DECLARE_INSTANCE_CHECKER(VirtIOSerial, VIRTIO_SERIAL,
-                         TYPE_VIRTIO_SERIAL)
+OBJECT_DECLARE_SIMPLE_TYPE(VirtIOSerial, VIRTIO_SERIAL)
 
 #endif
diff --git a/include/hw/watchdog/cmsdk-apb-watchdog.h b/include/hw/watchdog/cmsdk-apb-watchdog.h
index 63f4bec..3da0d43 100644
--- a/include/hw/watchdog/cmsdk-apb-watchdog.h
+++ b/include/hw/watchdog/cmsdk-apb-watchdog.h
@@ -36,9 +36,7 @@
 #include "qom/object.h"
 
 #define TYPE_CMSDK_APB_WATCHDOG "cmsdk-apb-watchdog"
-typedef struct CMSDKAPBWatchdog CMSDKAPBWatchdog;
-DECLARE_INSTANCE_CHECKER(CMSDKAPBWatchdog, CMSDK_APB_WATCHDOG,
-                         TYPE_CMSDK_APB_WATCHDOG)
+OBJECT_DECLARE_SIMPLE_TYPE(CMSDKAPBWatchdog, CMSDK_APB_WATCHDOG)
 
 /*
  * This shares the same struct (and cast macro) as the base
diff --git a/include/hw/watchdog/wdt_imx2.h b/include/hw/watchdog/wdt_imx2.h
index 7665d93..023d83f 100644
--- a/include/hw/watchdog/wdt_imx2.h
+++ b/include/hw/watchdog/wdt_imx2.h
@@ -19,9 +19,7 @@
 #include "qom/object.h"
 
 #define TYPE_IMX2_WDT "imx2.wdt"
-typedef struct IMX2WdtState IMX2WdtState;
-DECLARE_INSTANCE_CHECKER(IMX2WdtState, IMX2_WDT,
-                         TYPE_IMX2_WDT)
+OBJECT_DECLARE_SIMPLE_TYPE(IMX2WdtState, IMX2_WDT)
 
 enum IMX2WdtRegisters {
     IMX2_WDT_WCR  = 0x0000, /* Control Register */
diff --git a/include/hw/xen/xen-block.h b/include/hw/xen/xen-block.h
index a74fd93..d692ea7 100644
--- a/include/hw/xen/xen-block.h
+++ b/include/hw/xen/xen-block.h
@@ -75,19 +75,15 @@
 struct XenDiskDevice {
     XenBlockDevice blockdev;
 };
-typedef struct XenDiskDevice XenDiskDevice;
 
 #define TYPE_XEN_DISK_DEVICE  "xen-disk"
-DECLARE_INSTANCE_CHECKER(XenDiskDevice, XEN_DISK_DEVICE,
-                         TYPE_XEN_DISK_DEVICE)
+OBJECT_DECLARE_SIMPLE_TYPE(XenDiskDevice, XEN_DISK_DEVICE)
 
 struct XenCDRomDevice {
     XenBlockDevice blockdev;
 };
-typedef struct XenCDRomDevice XenCDRomDevice;
 
 #define TYPE_XEN_CDROM_DEVICE  "xen-cdrom"
-DECLARE_INSTANCE_CHECKER(XenCDRomDevice, XEN_CDROM_DEVICE,
-                         TYPE_XEN_CDROM_DEVICE)
+OBJECT_DECLARE_SIMPLE_TYPE(XenCDRomDevice, XEN_CDROM_DEVICE)
 
 #endif /* HW_XEN_BLOCK_H */