[PATCH 00/21] hw: More QDev cleanups

[PATCH 00/21] hw: More QDev cleanups

[Philippe Mathieu-Daudé]

Various QDev cleanups extracted to my "enforce QDev API" branch.
- When available, instead of plain QOM, use QDev API equivalent
- Add missing QOM parentship for some obj created with qdev_*new()
- Prefer object_initialize_child() over object_initialize()

Philippe Mathieu-Daudé (21):
  hw/i386/pc: Do not use C99 mixed-declarations style
  hw/i386/pc_sysfw: Use qdev_is_realized() instead of QOM API
  hw/ppc/spapr_cpu: Use qdev_is_realized() instead of QOM API
  hw/tricore/testboard: Use qdev_new() instead of QOM basic API
  hw/ppc/pnv_bmc: Use qdev_new() instead of QOM API
  hw: Replace DEVICE(object_new) -> qdev_new()
  target: Replace DEVICE(object_new) -> qdev_new()
  hw/isa: Inline isa_try_new()
  hw/usb: Inline usb_try_new()
  hw/usb: Inline usb_new()
  hw/usb: Add QOM parentship relation with hub devices
  hw/pci-host/q35: Update q35_host_props[] comment
  hw/pci-host/raven: Embedded OrIRQ in PRePPCIState
  hw/pci-host/raven: Prefer object_initialize_child over
    object_initialize
  hw/core/register: Prefer object_initialize_child over
    object_initialize
  hw/net/can/versal: Prefer object_initialize_child over
    object_initialize
  hw/i386/iommu: Prefer object_initialize_child over object_initialize
  hw/pci-host/versatile: Replace object_initialize() -> _child()
  hw/s390x/zpci-bus: Add QOM parentship relation with zPCI devices
  hw/arm/mps2: Add QOM parentship relation with OR IRQ gates
  hw: Add QOM parentship relation with CPUs

 include/hw/isa/isa.h                     |  1 -
 include/hw/net/ne2000-isa.h              |  2 +-
 include/hw/tricore/tricore_testdevice.h  |  3 ---
 include/hw/usb.h                         |  1 -
 hw/arm/mps2.c                            |  5 +++++
 hw/arm/musicpal.c                        |  2 +-
 hw/core/qdev.c                           |  2 +-
 hw/core/register.c                       |  2 +-
 hw/i386/amd_iommu.c                      |  6 +++---
 hw/i386/pc.c                             |  6 +++---
 hw/i386/pc_sysfw.c                       |  6 ++----
 hw/i386/x86.c                            |  1 +
 hw/isa/isa-bus.c                         |  5 -----
 hw/microblaze/petalogix_ml605_mmu.c      |  1 +
 hw/microblaze/petalogix_s3adsp1800_mmu.c |  1 +
 hw/mips/cps.c                            |  1 +
 hw/net/can/xlnx-versal-canfd.c           |  2 +-
 hw/nios2/10m50_devboard.c                |  1 +
 hw/pci-host/q35.c                        |  6 +++---
 hw/pci-host/raven.c                      | 18 ++++++++----------
 hw/pci-host/versatile.c                  |  3 ++-
 hw/ppc/e500.c                            |  1 +
 hw/ppc/pnv_bmc.c                         | 10 +++++-----
 hw/ppc/spapr.c                           |  1 +
 hw/ppc/spapr_cpu_core.c                  |  3 +--
 hw/s390x/s390-pci-bus.c                  |  1 +
 hw/sparc/sun4m.c                         |  4 ++--
 hw/tricore/tricore_testboard.c           |  4 +---
 hw/usb/bus.c                             | 17 ++++-------------
 hw/usb/dev-serial.c                      |  2 +-
 target/mips/cpu.c                        |  2 +-
 target/xtensa/cpu.c                      |  2 +-
 32 files changed, 55 insertions(+), 67 deletions(-)

-- 
2.41.0

[PATCH 01/21] hw/i386/pc: Do not use C99 mixed-declarations style

[Philippe Mathieu-Daudé]

QEMU's coding style generally forbids C99 mixed declarations.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 hw/i386/pc.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index 196827531a..3c00a87317 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -1227,6 +1227,7 @@ void pc_basic_device_init(struct PCMachineState *pcms,
      */
     if (pcms->hpet_enabled) {
         qemu_irq rtc_irq;
+        uint8_t compat;
 
         hpet = qdev_try_new(TYPE_HPET);
         if (!hpet) {
@@ -1238,8 +1239,7 @@ void pc_basic_device_init(struct PCMachineState *pcms,
          * use IRQ16~23, IRQ8 and IRQ2.  If the user has already set
          * the property, use whatever mask they specified.
          */
-        uint8_t compat = object_property_get_uint(OBJECT(hpet),
-                HPET_INTCAP, NULL);
+        compat = object_property_get_uint(OBJECT(hpet), HPET_INTCAP, NULL);
         if (!compat) {
             qdev_prop_set_uint32(hpet, HPET_INTCAP, hpet_irqs);
         }
-- 
2.41.0

[PATCH 02/21] hw/i386/pc_sysfw: Use qdev_is_realized() instead of QOM API

[Philippe Mathieu-Daudé]

Prefer QDev API for QDev objects, avoid the underlying QOM layer.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 hw/i386/pc_sysfw.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/hw/i386/pc_sysfw.c b/hw/i386/pc_sysfw.c
index c8d9e71b88..3efabbbab2 100644
--- a/hw/i386/pc_sysfw.c
+++ b/hw/i386/pc_sysfw.c
@@ -107,17 +107,15 @@ void pc_system_flash_cleanup_unused(PCMachineState *pcms)
 {
     char *prop_name;
     int i;
-    Object *dev_obj;
 
     assert(PC_MACHINE_GET_CLASS(pcms)->pci_enabled);
 
     for (i = 0; i < ARRAY_SIZE(pcms->flash); i++) {
-        dev_obj = OBJECT(pcms->flash[i]);
-        if (!object_property_get_bool(dev_obj, "realized", &error_abort)) {
+        if (!qdev_is_realized(DEVICE(pcms->flash[i]))) {
             prop_name = g_strdup_printf("pflash%d", i);
             object_property_del(OBJECT(pcms), prop_name);
             g_free(prop_name);
-            object_unparent(dev_obj);
+            object_unparent(OBJECT(pcms->flash[i]));
             pcms->flash[i] = NULL;
         }
     }
-- 
2.41.0

[PATCH 03/21] hw/ppc/spapr_cpu: Use qdev_is_realized() instead of QOM API

[Philippe Mathieu-Daudé]

Prefer QDev API for QDev objects, avoid the underlying QOM layer.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 hw/ppc/spapr_cpu_core.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/hw/ppc/spapr_cpu_core.c b/hw/ppc/spapr_cpu_core.c
index 0c0fb3f1b0..40b7c52f7f 100644
--- a/hw/ppc/spapr_cpu_core.c
+++ b/hw/ppc/spapr_cpu_core.c
@@ -245,8 +245,7 @@ static void spapr_cpu_core_unrealize(DeviceState *dev)
              * spapr_cpu_core_realize(), make sure we only unrealize
              * vCPUs that have already been realized.
              */
-            if (object_property_get_bool(OBJECT(sc->threads[i]), "realized",
-                                         &error_abort)) {
+            if (qdev_is_realized(DEVICE(sc->threads[i]))) {
                 spapr_unrealize_vcpu(sc->threads[i], sc);
             }
             spapr_delete_vcpu(sc->threads[i]);
-- 
2.41.0

[PATCH 04/21] hw/tricore/testboard: Use qdev_new() instead of QOM basic API

[Philippe Mathieu-Daudé]

Prefer QDev API for QDev objects, avoid the underlying QOM layer.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 include/hw/tricore/tricore_testdevice.h | 3 ---
 hw/tricore/tricore_testboard.c          | 4 +---
 2 files changed, 1 insertion(+), 6 deletions(-)

diff --git a/include/hw/tricore/tricore_testdevice.h b/include/hw/tricore/tricore_testdevice.h
index 8b4fe15f24..2c57b62f22 100644
--- a/include/hw/tricore/tricore_testdevice.h
+++ b/include/hw/tricore/tricore_testdevice.h
@@ -25,12 +25,9 @@
     OBJECT_CHECK(TriCoreTestDeviceState, (obj), TYPE_TRICORE_TESTDEVICE)
 
 typedef struct {
-    /* <private> */
     SysBusDevice parent_obj;
 
-    /* <public> */
     MemoryRegion iomem;
-
 } TriCoreTestDeviceState;
 
 #endif
diff --git a/hw/tricore/tricore_testboard.c b/hw/tricore/tricore_testboard.c
index b6810e3be0..c29db8b451 100644
--- a/hw/tricore/tricore_testboard.c
+++ b/hw/tricore/tricore_testboard.c
@@ -89,9 +89,7 @@ static void tricore_testboard_init(MachineState *machine, int board_id)
     memory_region_add_subregion(sysmem, 0xf0050000, pcp_data);
     memory_region_add_subregion(sysmem, 0xf0060000, pcp_text);
 
-    test_dev = g_new(TriCoreTestDeviceState, 1);
-    object_initialize(test_dev, sizeof(TriCoreTestDeviceState),
-                      TYPE_TRICORE_TESTDEVICE);
+    test_dev = TRICORE_TESTDEVICE(qdev_new(TYPE_TRICORE_TESTDEVICE));
     memory_region_add_subregion(sysmem, 0xf0000000, &test_dev->iomem);
 
 
-- 
2.41.0

[PATCH 05/21] hw/ppc/pnv_bmc: Use qdev_new() instead of QOM API

[Philippe Mathieu-Daudé]

Prefer QDev API for QDev objects, avoid the underlying QOM layer.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 hw/ppc/pnv_bmc.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/hw/ppc/pnv_bmc.c b/hw/ppc/pnv_bmc.c
index 99f1e8d7f9..0c1274df21 100644
--- a/hw/ppc/pnv_bmc.c
+++ b/hw/ppc/pnv_bmc.c
@@ -269,13 +269,13 @@ void pnv_bmc_set_pnor(IPMIBmc *bmc, PnvPnor *pnor)
  */
 IPMIBmc *pnv_bmc_create(PnvPnor *pnor)
 {
-    Object *obj;
+    DeviceState *dev;
 
-    obj = object_new(TYPE_IPMI_BMC_SIMULATOR);
-    qdev_realize(DEVICE(obj), NULL, &error_fatal);
-    pnv_bmc_set_pnor(IPMI_BMC(obj), pnor);
+    dev = qdev_new(TYPE_IPMI_BMC_SIMULATOR);
+    qdev_realize(dev, NULL, &error_fatal);
+    pnv_bmc_set_pnor(IPMI_BMC(dev), pnor);
 
-    return IPMI_BMC(obj);
+    return IPMI_BMC(dev);
 }
 
 typedef struct ForeachArgs {
-- 
2.41.0

[PATCH 06/21] hw: Replace DEVICE(object_new) -> qdev_new()

[Philippe Mathieu-Daudé]

Prefer QDev API for QDev objects, avoid the underlying QOM layer.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 hw/arm/musicpal.c | 2 +-
 hw/core/qdev.c    | 2 +-
 hw/sparc/sun4m.c  | 4 ++--
 3 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/hw/arm/musicpal.c b/hw/arm/musicpal.c
index 2020f73a57..74e4d24aab 100644
--- a/hw/arm/musicpal.c
+++ b/hw/arm/musicpal.c
@@ -1238,7 +1238,7 @@ static void musicpal_init(MachineState *machine)
                           qdev_get_gpio_in(pic, MP_TIMER4_IRQ), NULL);
 
     /* Logically OR both UART IRQs together */
-    uart_orgate = DEVICE(object_new(TYPE_OR_IRQ));
+    uart_orgate = qdev_new(TYPE_OR_IRQ);
     object_property_set_int(OBJECT(uart_orgate), "num-lines", 2, &error_fatal);
     qdev_realize_and_unref(uart_orgate, NULL, &error_fatal);
     qdev_connect_gpio_out(uart_orgate, 0,
diff --git a/hw/core/qdev.c b/hw/core/qdev.c
index c68d0f7c51..a271380d20 100644
--- a/hw/core/qdev.c
+++ b/hw/core/qdev.c
@@ -171,7 +171,7 @@ DeviceState *qdev_try_new(const char *name)
     if (!module_object_class_by_name(name)) {
         return NULL;
     }
-    return DEVICE(object_new(name));
+    return qdev_new(name);
 }
 
 static QTAILQ_HEAD(, DeviceListener) device_listeners
diff --git a/hw/sparc/sun4m.c b/hw/sparc/sun4m.c
index d52e6a7213..fedc4b8b3f 100644
--- a/hw/sparc/sun4m.c
+++ b/hw/sparc/sun4m.c
@@ -979,7 +979,7 @@ static void sun4m_hw_init(MachineState *machine)
     sysbus_mmio_map(s, 0, hwdef->ms_kb_base);
 
     /* Logically OR both its IRQs together */
-    ms_kb_orgate = DEVICE(object_new(TYPE_OR_IRQ));
+    ms_kb_orgate = qdev_new(TYPE_OR_IRQ);
     object_property_set_int(OBJECT(ms_kb_orgate), "num-lines", 2, &error_fatal);
     qdev_realize_and_unref(ms_kb_orgate, NULL, &error_fatal);
     sysbus_connect_irq(s, 0, qdev_get_gpio_in(ms_kb_orgate, 0));
@@ -1000,7 +1000,7 @@ static void sun4m_hw_init(MachineState *machine)
     sysbus_mmio_map(s, 0, hwdef->serial_base);
 
     /* Logically OR both its IRQs together */
-    serial_orgate = DEVICE(object_new(TYPE_OR_IRQ));
+    serial_orgate = qdev_new(TYPE_OR_IRQ);
     object_property_set_int(OBJECT(serial_orgate), "num-lines", 2,
                             &error_fatal);
     qdev_realize_and_unref(serial_orgate, NULL, &error_fatal);
-- 
2.41.0

[PATCH 07/21] target: Replace DEVICE(object_new) -> qdev_new()

[Philippe Mathieu-Daudé]

Prefer QDev API for QDev objects, avoid the underlying QOM layer.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 target/mips/cpu.c   | 2 +-
 target/xtensa/cpu.c | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/target/mips/cpu.c b/target/mips/cpu.c
index d644adbc77..6b3909ee08 100644
--- a/target/mips/cpu.c
+++ b/target/mips/cpu.c
@@ -649,7 +649,7 @@ MIPSCPU *mips_cpu_create_with_clock(const char *cpu_type, Clock *cpu_refclk)
 {
     DeviceState *cpu;
 
-    cpu = DEVICE(object_new(cpu_type));
+    cpu = qdev_new(cpu_type);
     qdev_connect_clock_in(cpu, "clk-in", cpu_refclk);
     qdev_realize(cpu, NULL, &error_abort);
 
diff --git a/target/xtensa/cpu.c b/target/xtensa/cpu.c
index 79f91819df..4f9408e1a0 100644
--- a/target/xtensa/cpu.c
+++ b/target/xtensa/cpu.c
@@ -205,7 +205,7 @@ XtensaCPU *xtensa_cpu_create_with_clock(const char *cpu_type, Clock *cpu_refclk)
 {
     DeviceState *cpu;
 
-    cpu = DEVICE(object_new(cpu_type));
+    cpu = qdev_new(cpu_type);
     qdev_connect_clock_in(cpu, "clk-in", cpu_refclk);
     qdev_realize(cpu, NULL, &error_abort);
 
-- 
2.41.0

[PATCH 08/21] hw/isa: Inline isa_try_new()

[Philippe Mathieu-Daudé]

Inline the 2 single uses of isa_try_new().

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 include/hw/isa/isa.h        | 1 -
 include/hw/net/ne2000-isa.h | 2 +-
 hw/i386/pc.c                | 2 +-
 hw/isa/isa-bus.c            | 5 -----
 4 files changed, 2 insertions(+), 8 deletions(-)

diff --git a/include/hw/isa/isa.h b/include/hw/isa/isa.h
index 40d6224a4e..8475120849 100644
--- a/include/hw/isa/isa.h
+++ b/include/hw/isa/isa.h
@@ -81,7 +81,6 @@ IsaDma *isa_bus_get_dma(ISABus *bus, int nchan);
  */
 qemu_irq isa_bus_get_irq(ISABus *bus, unsigned irqnum);
 ISADevice *isa_new(const char *name);
-ISADevice *isa_try_new(const char *name);
 bool isa_realize_and_unref(ISADevice *dev, ISABus *bus, Error **errp);
 ISADevice *isa_create_simple(ISABus *bus, const char *name);
 
diff --git a/include/hw/net/ne2000-isa.h b/include/hw/net/ne2000-isa.h
index 73bae10ad1..2440ac8621 100644
--- a/include/hw/net/ne2000-isa.h
+++ b/include/hw/net/ne2000-isa.h
@@ -22,7 +22,7 @@ static inline ISADevice *isa_ne2000_init(ISABus *bus, int base, int irq,
 {
     ISADevice *d;
 
-    d = isa_try_new(TYPE_ISA_NE2000);
+    d = ISA_DEVICE(qdev_try_new(TYPE_ISA_NE2000));
     if (d) {
         DeviceState *dev = DEVICE(d);
 
diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index 3c00a87317..e8130774ad 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -1183,7 +1183,7 @@ static void pc_superio_init(ISABus *isa_bus, bool create_fdctrl,
     i8042 = isa_create_simple(isa_bus, TYPE_I8042);
     if (!no_vmport) {
         isa_create_simple(isa_bus, TYPE_VMPORT);
-        vmmouse = isa_try_new("vmmouse");
+        vmmouse = ISA_DEVICE(qdev_try_new("vmmouse"));
     } else {
         vmmouse = NULL;
     }
diff --git a/hw/isa/isa-bus.c b/hw/isa/isa-bus.c
index f1e0f14007..8aaf44a3ef 100644
--- a/hw/isa/isa-bus.c
+++ b/hw/isa/isa-bus.c
@@ -158,11 +158,6 @@ ISADevice *isa_new(const char *name)
     return ISA_DEVICE(qdev_new(name));
 }
 
-ISADevice *isa_try_new(const char *name)
-{
-    return ISA_DEVICE(qdev_try_new(name));
-}
-
 ISADevice *isa_create_simple(ISABus *bus, const char *name)
 {
     ISADevice *dev;
-- 
2.41.0

[PATCH 09/21] hw/usb: Inline usb_try_new()

[Philippe Mathieu-Daudé]

Inline the single use of usb_try_new().

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 hw/usb/bus.c | 7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)

diff --git a/hw/usb/bus.c b/hw/usb/bus.c
index 59c39945dd..148224f06a 100644
--- a/hw/usb/bus.c
+++ b/hw/usb/bus.c
@@ -334,11 +334,6 @@ USBDevice *usb_new(const char *name)
     return USB_DEVICE(qdev_new(name));
 }
 
-static USBDevice *usb_try_new(const char *name)
-{
-    return USB_DEVICE(qdev_try_new(name));
-}
-
 bool usb_realize_and_unref(USBDevice *dev, USBBus *bus, Error **errp)
 {
     return qdev_realize_and_unref(&dev->qdev, &bus->qbus, errp);
@@ -447,7 +442,7 @@ void usb_claim_port(USBDevice *dev, Error **errp)
     } else {
         if (bus->nfree == 1 && strcmp(object_get_typename(OBJECT(dev)), "usb-hub") != 0) {
             /* Create a new hub and chain it on */
-            hub = usb_try_new("usb-hub");
+            hub = USB_DEVICE(qdev_try_new("usb-hub"));
             if (hub) {
                 usb_realize_and_unref(hub, bus, NULL);
             }
-- 
2.41.0

[PATCH 10/21] hw/usb: Inline usb_new()

[Philippe Mathieu-Daudé]

Inline the 2 uses of usb_new().

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 include/hw/usb.h    | 1 -
 hw/usb/bus.c        | 9 ++-------
 hw/usb/dev-serial.c | 2 +-
 3 files changed, 3 insertions(+), 9 deletions(-)

diff --git a/include/hw/usb.h b/include/hw/usb.h
index 32c23a5ca2..2d820685cc 100644
--- a/include/hw/usb.h
+++ b/include/hw/usb.h
@@ -500,7 +500,6 @@ void usb_bus_release(USBBus *bus);
 USBBus *usb_bus_find(int busnr);
 void usb_legacy_register(const char *typename, const char *usbdevice_name,
                          USBDevice *(*usbdevice_init)(void));
-USBDevice *usb_new(const char *name);
 bool usb_realize_and_unref(USBDevice *dev, USBBus *bus, Error **errp);
 USBDevice *usb_create_simple(USBBus *bus, const char *name);
 USBDevice *usbdevice_create(const char *cmdline);
diff --git a/hw/usb/bus.c b/hw/usb/bus.c
index 148224f06a..a599e2552b 100644
--- a/hw/usb/bus.c
+++ b/hw/usb/bus.c
@@ -329,11 +329,6 @@ void usb_legacy_register(const char *typename, const char *usbdevice_name,
     }
 }
 
-USBDevice *usb_new(const char *name)
-{
-    return USB_DEVICE(qdev_new(name));
-}
-
 bool usb_realize_and_unref(USBDevice *dev, USBBus *bus, Error **errp)
 {
     return qdev_realize_and_unref(&dev->qdev, &bus->qbus, errp);
@@ -341,7 +336,7 @@ bool usb_realize_and_unref(USBDevice *dev, USBBus *bus, Error **errp)
 
 USBDevice *usb_create_simple(USBBus *bus, const char *name)
 {
-    USBDevice *dev = usb_new(name);
+    USBDevice *dev = USB_DEVICE(qdev_new(name));
 
     usb_realize_and_unref(dev, bus, &error_abort);
     return dev;
@@ -693,7 +688,7 @@ USBDevice *usbdevice_create(const char *driver)
         return NULL;
     }
 
-    dev = f->usbdevice_init ? f->usbdevice_init() : usb_new(f->name);
+    dev = f->usbdevice_init ? f->usbdevice_init() : USB_DEVICE(qdev_new(f->name));
     if (!dev) {
         error_report("Failed to create USB device '%s'", f->name);
         return NULL;
diff --git a/hw/usb/dev-serial.c b/hw/usb/dev-serial.c
index 63047d79cf..6e79c46d53 100644
--- a/hw/usb/dev-serial.c
+++ b/hw/usb/dev-serial.c
@@ -624,7 +624,7 @@ static USBDevice *usb_braille_init(void)
         return NULL;
     }
 
-    dev = usb_new("usb-braille");
+    dev = USB_DEVICE(qdev_new("usb-braille"));
     qdev_prop_set_chr(&dev->qdev, "chardev", cdrv);
     return dev;
 }
-- 
2.41.0

[PATCH 11/21] hw/usb: Add QOM parentship relation with hub devices

[Philippe Mathieu-Daudé]

QDev objects created with qdev_*new() need to manually add
their parent relationship with object_property_add_child().

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 hw/usb/bus.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/hw/usb/bus.c b/hw/usb/bus.c
index a599e2552b..baad04f466 100644
--- a/hw/usb/bus.c
+++ b/hw/usb/bus.c
@@ -439,6 +439,7 @@ void usb_claim_port(USBDevice *dev, Error **errp)
             /* Create a new hub and chain it on */
             hub = USB_DEVICE(qdev_try_new("usb-hub"));
             if (hub) {
+                object_property_add_child(OBJECT(dev), "hub", OBJECT(hub));
                 usb_realize_and_unref(hub, bus, NULL);
             }
         }
-- 
2.41.0

[PATCH 12/21] hw/pci-host/q35: Update q35_host_props[] comment

[Philippe Mathieu-Daudé]

Commit aff39be0ed ("hw/pci-host: Use object_initialize_child for
correct reference counting") replaced object_initialize() by
object_initialize_child(), update the comment.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 hw/pci-host/q35.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/hw/pci-host/q35.c b/hw/pci-host/q35.c
index 0d7d4e3f08..0eb1c7034d 100644
--- a/hw/pci-host/q35.c
+++ b/hw/pci-host/q35.c
@@ -165,10 +165,10 @@ static void q35_host_get_pci_hole64_end(Object *obj, Visitor *v,
 /*
  * NOTE: setting defaults for the mch.* fields in this table
  * doesn't work, because mch is a separate QOM object that is
- * zeroed by the object_initialize(&s->mch, ...) call inside
+ * zeroed by the object_initialize_child(..., &s->mch, ...) call inside
  * q35_host_initfn().  The default values for those
  * properties need to be initialized manually by
- * q35_host_initfn() after the object_initialize() call.
+ * q35_host_initfn() after the object_initialize_child() call.
  */
 static Property q35_host_props[] = {
     DEFINE_PROP_UINT64(PCIE_HOST_MCFG_BASE, Q35PCIHost, parent_obj.base_addr,
@@ -211,7 +211,7 @@ static void q35_host_initfn(Object *obj)
     object_initialize_child(OBJECT(s), "mch", &s->mch, TYPE_MCH_PCI_DEVICE);
     qdev_prop_set_int32(DEVICE(&s->mch), "addr", PCI_DEVFN(0, 0));
     qdev_prop_set_bit(DEVICE(&s->mch), "multifunction", false);
-    /* mch's object_initialize resets the default value, set it again */
+    /* mch's object_initialize_child resets the default value, set it again */
     qdev_prop_set_uint64(DEVICE(s), PCI_HOST_PROP_PCI_HOLE64_SIZE,
                          Q35_PCI_HOST_HOLE64_SIZE_DEFAULT);
     object_property_add(obj, PCI_HOST_PROP_PCI_HOLE_START, "uint32",
-- 
2.41.0

[PATCH 13/21] hw/pci-host/raven: Embedded OrIRQ in PRePPCIState

[Philippe Mathieu-Daudé]

Since we know the size of the OrIRQ object, we can initialize
it directly in place with object_initialize_child(). Doing so
we also set the QOM parent <-> child relationship.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 hw/pci-host/raven.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/hw/pci-host/raven.c b/hw/pci-host/raven.c
index c7a0a2878a..9e47caebc5 100644
--- a/hw/pci-host/raven.c
+++ b/hw/pci-host/raven.c
@@ -60,7 +60,7 @@ DECLARE_INSTANCE_CHECKER(PREPPCIState, RAVEN_PCI_HOST_BRIDGE,
 struct PRePPCIState {
     PCIHostState parent_obj;
 
-    OrIRQState *or_irq;
+    OrIRQState or_irq;
     qemu_irq pci_irqs[PCI_NUM_PINS];
     PCIBus pci_bus;
     AddressSpace pci_io_as;
@@ -249,14 +249,14 @@ static void raven_pcihost_realizefn(DeviceState *d, Error **errp)
     } else {
         /* According to PReP specification section 6.1.6 "System Interrupt
          * Assignments", all PCI interrupts are routed via IRQ 15 */
-        s->or_irq = OR_IRQ(object_new(TYPE_OR_IRQ));
-        object_property_set_int(OBJECT(s->or_irq), "num-lines", PCI_NUM_PINS,
+        object_initialize_child(OBJECT(dev), "or-irq", &s->or_irq, TYPE_OR_IRQ);
+        object_property_set_int(OBJECT(&s->or_irq), "num-lines", PCI_NUM_PINS,
                                 &error_fatal);
-        qdev_realize(DEVICE(s->or_irq), NULL, &error_fatal);
-        sysbus_init_irq(dev, &s->or_irq->out_irq);
+        qdev_realize(DEVICE(&s->or_irq), NULL, &error_fatal);
+        sysbus_init_irq(dev, &s->or_irq.out_irq);
 
         for (i = 0; i < PCI_NUM_PINS; i++) {
-            s->pci_irqs[i] = qdev_get_gpio_in(DEVICE(s->or_irq), i);
+            s->pci_irqs[i] = qdev_get_gpio_in(DEVICE(&s->or_irq), i);
         }
     }
 
-- 
2.41.0

[PATCH 14/21] hw/pci-host/raven: Prefer object_initialize_child over object_initialize

[Philippe Mathieu-Daudé]

When the QOM parent is available, prefer object_initialize_child()
over object_initialize(), since it create the parent relationship.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 hw/pci-host/raven.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/hw/pci-host/raven.c b/hw/pci-host/raven.c
index 9e47caebc5..5ef25edba6 100644
--- a/hw/pci-host/raven.c
+++ b/hw/pci-host/raven.c
@@ -290,7 +290,6 @@ static void raven_pcihost_initfn(Object *obj)
     PCIHostState *h = PCI_HOST_BRIDGE(obj);
     PREPPCIState *s = RAVEN_PCI_HOST_BRIDGE(obj);
     MemoryRegion *address_space_mem = get_system_memory();
-    DeviceState *pci_dev;
 
     memory_region_init(&s->pci_io, obj, "pci-io", 0x3f800000);
     memory_region_init_io(&s->pci_io_non_contiguous, obj, &raven_io_ops, s,
@@ -328,11 +327,10 @@ static void raven_pcihost_initfn(Object *obj)
 
     h->bus = &s->pci_bus;
 
-    object_initialize(&s->pci_dev, sizeof(s->pci_dev), TYPE_RAVEN_PCI_DEVICE);
-    pci_dev = DEVICE(&s->pci_dev);
+    object_initialize_child(obj, "bridge", &s->pci_dev, TYPE_RAVEN_PCI_DEVICE);
     object_property_set_int(OBJECT(&s->pci_dev), "addr", PCI_DEVFN(0, 0),
                             NULL);
-    qdev_prop_set_bit(pci_dev, "multifunction", false);
+    qdev_prop_set_bit(DEVICE(&s->pci_dev), "multifunction", false);
 }
 
 static void raven_realize(PCIDevice *d, Error **errp)
-- 
2.41.0

[PATCH 15/21] hw/core/register: Prefer object_initialize_child over object_initialize

[Philippe Mathieu-Daudé]

When the QOM parent is available, prefer object_initialize_child()
over object_initialize(), since it create the parent relationship.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 hw/core/register.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/hw/core/register.c b/hw/core/register.c
index 95b0150c0a..b6beca0e02 100644
--- a/hw/core/register.c
+++ b/hw/core/register.c
@@ -259,7 +259,7 @@ static RegisterInfoArray *register_init_block(DeviceState *owner,
         RegisterInfo *r = &ri[index];
 
         /* Init the register, this will zero it. */
-        object_initialize((void *)r, sizeof(*r), TYPE_REGISTER);
+        object_initialize_child(OBJECT(owner), "reg[*]", r, TYPE_REGISTER);
 
         /* Set the properties of the register */
         r->data = data + data_size * index;
-- 
2.41.0

[PATCH 16/21] hw/net/can/versal: Prefer object_initialize_child over object_initialize

[Philippe Mathieu-Daudé]

When the QOM parent is available, prefer object_initialize_child()
over object_initialize(), since it create the parent relationship.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 hw/net/can/xlnx-versal-canfd.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/hw/net/can/xlnx-versal-canfd.c b/hw/net/can/xlnx-versal-canfd.c
index 47a14cfe63..f8e4bd75e4 100644
--- a/hw/net/can/xlnx-versal-canfd.c
+++ b/hw/net/can/xlnx-versal-canfd.c
@@ -1900,7 +1900,7 @@ static int canfd_populate_regarray(XlnxVersalCANFDState *s,
         int index = rae[i].addr / 4;
         RegisterInfo *r = &s->reg_info[index];
 
-        object_initialize(r, sizeof(*r), TYPE_REGISTER);
+        object_initialize_child(OBJECT(s), "reg[*]", r, TYPE_REGISTER);
 
         *r = (RegisterInfo) {
             .data = &s->regs[index],
-- 
2.41.0

[PATCH 17/21] hw/i386/iommu: Prefer object_initialize_child over object_initialize

[Philippe Mathieu-Daudé]

When the QOM parent is available, prefer object_initialize_child()
over object_initialize(), since it create the parent relationship.

Rename the 'klass' variable as 'obj' since the argument holds a
reference to an instance object and not a class one.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 hw/i386/amd_iommu.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/hw/i386/amd_iommu.c b/hw/i386/amd_iommu.c
index 7329553ad3..c3afbc4130 100644
--- a/hw/i386/amd_iommu.c
+++ b/hw/i386/amd_iommu.c
@@ -1616,11 +1616,11 @@ static const VMStateDescription vmstate_amdvi_sysbus = {
     .unmigratable = 1
 };
 
-static void amdvi_sysbus_instance_init(Object *klass)
+static void amdvi_sysbus_instance_init(Object *obj)
 {
-    AMDVIState *s = AMD_IOMMU_DEVICE(klass);
+    AMDVIState *s = AMD_IOMMU_DEVICE(obj);
 
-    object_initialize(&s->pci, sizeof(s->pci), TYPE_AMD_IOMMU_PCI);
+    object_initialize_child(obj, "iommu", &s->pci, TYPE_AMD_IOMMU_PCI);
 }
 
 static void amdvi_sysbus_class_init(ObjectClass *klass, void *data)
-- 
2.41.0

[PATCH 18/21] hw/pci-host/versatile: Replace object_initialize() -> _child()

[Philippe Mathieu-Daudé]

When the QOM parent is available, prefer object_initialize_child()
over object_initialize(), since it create the parent relationship.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 hw/pci-host/versatile.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/hw/pci-host/versatile.c b/hw/pci-host/versatile.c
index 0e65deb3f9..5d1f9cc96d 100644
--- a/hw/pci-host/versatile.c
+++ b/hw/pci-host/versatile.c
@@ -410,7 +410,8 @@ static void pci_vpb_realize(DeviceState *dev, Error **errp)
                       PCI_DEVFN(11, 0), TYPE_PCI_BUS);
     h->bus = &s->pci_bus;
 
-    object_initialize(&s->pci_dev, sizeof(s->pci_dev), TYPE_VERSATILE_PCI_HOST);
+    object_initialize_child(OBJECT(dev), "pci-func0",
+                            &s->pci_dev, TYPE_VERSATILE_PCI_HOST);
 
     for (i = 0; i < 4; i++) {
         sysbus_init_irq(sbd, &s->irq[i]);
-- 
2.41.0

[PATCH 19/21] hw/s390x/zpci-bus: Add QOM parentship relation with zPCI devices

[Philippe Mathieu-Daudé]

QDev objects created with qdev_*new() need to manually add
their parent relationship with object_property_add_child().

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 hw/s390x/s390-pci-bus.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/hw/s390x/s390-pci-bus.c b/hw/s390x/s390-pci-bus.c
index 3e57d5faca..6d07a7b530 100644
--- a/hw/s390x/s390-pci-bus.c
+++ b/hw/s390x/s390-pci-bus.c
@@ -934,6 +934,7 @@ static S390PCIBusDevice *s390_pci_device_new(S390pciState *s,
                                 "zPCI device could not be created: ");
         return NULL;
     }
+    object_property_add_child(OBJECT(s), "zpci[*]", OBJECT(dev));
     if (!qdev_realize_and_unref(dev, BUS(s->bus), &local_err)) {
         object_unparent(OBJECT(dev));
         error_propagate_prepend(errp, local_err,
-- 
2.41.0

[PATCH 20/21] hw/arm/mps2: Add QOM parentship relation with OR IRQ gates

[Philippe Mathieu-Daudé]

QDev objects created with object_new() need to manually add
their parent relationship with object_property_add_child().

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
Better would be to embedded an call object_initialize_child()...
---
 hw/arm/mps2.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/hw/arm/mps2.c b/hw/arm/mps2.c
index 50919ee46d..780f2adf0f 100644
--- a/hw/arm/mps2.c
+++ b/hw/arm/mps2.c
@@ -274,6 +274,7 @@ static void mps2_common_init(MachineState *machine)
 
         orgate = object_new(TYPE_OR_IRQ);
         object_property_set_int(orgate, "num-lines", 6, &error_fatal);
+        object_property_add_child(OBJECT(machine), "orgate12", orgate);
         qdev_realize(DEVICE(orgate), NULL, &error_fatal);
         orgate_dev = DEVICE(orgate);
         qdev_connect_gpio_out(orgate_dev, 0, qdev_get_gpio_in(armv7m, 12));
@@ -317,6 +318,7 @@ static void mps2_common_init(MachineState *machine)
 
         orgate = object_new(TYPE_OR_IRQ);
         object_property_set_int(orgate, "num-lines", 10, &error_fatal);
+        object_property_add_child(OBJECT(machine), "orgate-12", orgate);
         qdev_realize(DEVICE(orgate), NULL, &error_fatal);
         orgate_dev = DEVICE(orgate);
         qdev_connect_gpio_out(orgate_dev, 0, qdev_get_gpio_in(armv7m, 12));
@@ -333,6 +335,8 @@ static void mps2_common_init(MachineState *machine)
 
             txrx_orgate = object_new(TYPE_OR_IRQ);
             object_property_set_int(txrx_orgate, "num-lines", 2, &error_fatal);
+            object_property_add_child(OBJECT(machine),
+                                      "orgate-uart[*]", txrx_orgate);
             qdev_realize(DEVICE(txrx_orgate), NULL, &error_fatal);
             txrx_orgate_dev = DEVICE(txrx_orgate);
             qdev_connect_gpio_out(txrx_orgate_dev, 0,
@@ -425,6 +429,7 @@ static void mps2_common_init(MachineState *machine)
 
         orgate = object_new(TYPE_OR_IRQ);
         object_property_set_int(orgate, "num-lines", 2, &error_fatal);
+        object_property_add_child(OBJECT(machine), "orgate-ssi[*]", orgate);
         orgate_dev = DEVICE(orgate);
         qdev_realize(orgate_dev, NULL, &error_fatal);
         qdev_connect_gpio_out(orgate_dev, 0,
-- 
2.41.0

[PATCH 21/21] hw: Add QOM parentship relation with CPUs

[Philippe Mathieu-Daudé]

QDev objects created with object_new() need to manually add
their parent relationship with object_property_add_child().

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 hw/i386/x86.c                            | 1 +
 hw/microblaze/petalogix_ml605_mmu.c      | 1 +
 hw/microblaze/petalogix_s3adsp1800_mmu.c | 1 +
 hw/mips/cps.c                            | 1 +
 hw/nios2/10m50_devboard.c                | 1 +
 hw/ppc/e500.c                            | 1 +
 hw/ppc/spapr.c                           | 1 +
 7 files changed, 7 insertions(+)

diff --git a/hw/i386/x86.c b/hw/i386/x86.c
index 684dce90e9..7021419d91 100644
--- a/hw/i386/x86.c
+++ b/hw/i386/x86.c
@@ -102,6 +102,7 @@ void x86_cpu_new(X86MachineState *x86ms, int64_t apic_id, Error **errp)
     if (!object_property_set_uint(cpu, "apic-id", apic_id, errp)) {
         goto out;
     }
+    object_property_add_child(OBJECT(x86ms), "cpu[*]", OBJECT(cpu));
     qdev_realize(DEVICE(cpu), NULL, errp);
 
 out:
diff --git a/hw/microblaze/petalogix_ml605_mmu.c b/hw/microblaze/petalogix_ml605_mmu.c
index 0f5fabc32e..dfd881322d 100644
--- a/hw/microblaze/petalogix_ml605_mmu.c
+++ b/hw/microblaze/petalogix_ml605_mmu.c
@@ -83,6 +83,7 @@ petalogix_ml605_init(MachineState *machine)
 
     /* init CPUs */
     cpu = MICROBLAZE_CPU(object_new(TYPE_MICROBLAZE_CPU));
+    object_property_add_child(OBJECT(machine), "cpu", OBJECT(cpu));
     object_property_set_str(OBJECT(cpu), "version", "8.10.a", &error_abort);
     /* Use FPU but don't use floating point conversion and square
      * root instructions
diff --git a/hw/microblaze/petalogix_s3adsp1800_mmu.c b/hw/microblaze/petalogix_s3adsp1800_mmu.c
index dad46bd7f9..255d8d4d47 100644
--- a/hw/microblaze/petalogix_s3adsp1800_mmu.c
+++ b/hw/microblaze/petalogix_s3adsp1800_mmu.c
@@ -70,6 +70,7 @@ petalogix_s3adsp1800_init(MachineState *machine)
     MemoryRegion *sysmem = get_system_memory();
 
     cpu = MICROBLAZE_CPU(object_new(TYPE_MICROBLAZE_CPU));
+    object_property_add_child(OBJECT(machine), "cpu", OBJECT(cpu));
     object_property_set_str(OBJECT(cpu), "version", "7.10.d", &error_abort);
     qdev_realize(DEVICE(cpu), NULL, &error_abort);
 
diff --git a/hw/mips/cps.c b/hw/mips/cps.c
index 07b73b0a1f..6b4e918807 100644
--- a/hw/mips/cps.c
+++ b/hw/mips/cps.c
@@ -84,6 +84,7 @@ static void mips_cps_realize(DeviceState *dev, Error **errp)
         /* All cores use the same clock tree */
         qdev_connect_clock_in(DEVICE(cpu), "clk-in", s->clock);
 
+        object_property_add_child(OBJECT(dev), "cpu[*]", OBJECT(cpu));
         if (!qdev_realize_and_unref(DEVICE(cpu), NULL, errp)) {
             return;
         }
diff --git a/hw/nios2/10m50_devboard.c b/hw/nios2/10m50_devboard.c
index 6cb32f777b..f6a691d340 100644
--- a/hw/nios2/10m50_devboard.c
+++ b/hw/nios2/10m50_devboard.c
@@ -95,6 +95,7 @@ static void nios2_10m50_ghrd_init(MachineState *machine)
     cpu->exception_addr = 0xc8000120;
     cpu->fast_tlb_miss_addr = 0xc0000100;
 
+    object_property_add_child(OBJECT(machine), "cpu", OBJECT(cpu));
     qdev_realize_and_unref(DEVICE(cpu), NULL, &error_fatal);
 
     if (nms->vic) {
diff --git a/hw/ppc/e500.c b/hw/ppc/e500.c
index 3bd12b54ab..77b7d2858c 100644
--- a/hw/ppc/e500.c
+++ b/hw/ppc/e500.c
@@ -956,6 +956,7 @@ void ppce500_init(MachineState *machine)
          */
         object_property_set_bool(OBJECT(cs), "start-powered-off", i != 0,
                                  &error_abort);
+        object_property_add_child(OBJECT(machine), "cpu[*]", OBJECT(cpu));
         qdev_realize_and_unref(DEVICE(cs), NULL, &error_fatal);
 
         if (!firstenv) {
diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
index 0d72d286d8..b6e5caa0d2 100644
--- a/hw/ppc/spapr.c
+++ b/hw/ppc/spapr.c
@@ -2715,6 +2715,7 @@ static void spapr_init_cpus(SpaprMachineState *spapr)
                                     &error_fatal);
             object_property_set_int(core, CPU_CORE_PROP_CORE_ID, core_id,
                                     &error_fatal);
+            object_property_add_child(OBJECT(spapr), "cpu[*]", OBJECT(core));
             qdev_realize(DEVICE(core), NULL, &error_fatal);
 
             object_unref(core);
-- 
2.41.0

Re: [PATCH 05/21] hw/ppc/pnv_bmc: Use qdev_new() instead of QOM API

[Cédric Le Goater]

On 2/16/24 12:02, Philippe Mathieu-Daudé wrote:
> Prefer QDev API for QDev objects, avoid the underlying QOM layer.
> 
> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>


Reviewed-by: Cédric Le Goater <clg@kaod.org>

Thanks,

C.


> ---
>   hw/ppc/pnv_bmc.c | 10 +++++-----
>   1 file changed, 5 insertions(+), 5 deletions(-)
> 
> diff --git a/hw/ppc/pnv_bmc.c b/hw/ppc/pnv_bmc.c
> index 99f1e8d7f9..0c1274df21 100644
> --- a/hw/ppc/pnv_bmc.c
> +++ b/hw/ppc/pnv_bmc.c
> @@ -269,13 +269,13 @@ void pnv_bmc_set_pnor(IPMIBmc *bmc, PnvPnor *pnor)
>    */
>   IPMIBmc *pnv_bmc_create(PnvPnor *pnor)
>   {
> -    Object *obj;
> +    DeviceState *dev;
>   
> -    obj = object_new(TYPE_IPMI_BMC_SIMULATOR);
> -    qdev_realize(DEVICE(obj), NULL, &error_fatal);
> -    pnv_bmc_set_pnor(IPMI_BMC(obj), pnor);
> +    dev = qdev_new(TYPE_IPMI_BMC_SIMULATOR);
> +    qdev_realize(dev, NULL, &error_fatal);
> +    pnv_bmc_set_pnor(IPMI_BMC(dev), pnor);
>   
> -    return IPMI_BMC(obj);
> +    return IPMI_BMC(dev);
>   }
>   
>   typedef struct ForeachArgs {

Re: [PATCH 04/21] hw/tricore/testboard: Use qdev_new() instead of QOM basic API

[Bastian Koppelmann]

On Fri, Feb 16, 2024 at 12:02:55PM +0100, Philippe Mathieu-Daudé wrote:
> Prefer QDev API for QDev objects, avoid the underlying QOM layer.
> 
> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
> ---
>  include/hw/tricore/tricore_testdevice.h | 3 ---
>  hw/tricore/tricore_testboard.c          | 4 +---
>  2 files changed, 1 insertion(+), 6 deletions(-)

Reviewed-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>

Cheers,
Bastian

Re: [PATCH 19/21] hw/s390x/zpci-bus: Add QOM parentship relation with zPCI devices

[Thomas Huth]

On 16/02/2024 12.03, Philippe Mathieu-Daudé wrote:
> QDev objects created with qdev_*new() need to manually add
> their parent relationship with object_property_add_child().
> 
> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
> ---
>   hw/s390x/s390-pci-bus.c | 1 +
>   1 file changed, 1 insertion(+)
> 
> diff --git a/hw/s390x/s390-pci-bus.c b/hw/s390x/s390-pci-bus.c
> index 3e57d5faca..6d07a7b530 100644
> --- a/hw/s390x/s390-pci-bus.c
> +++ b/hw/s390x/s390-pci-bus.c
> @@ -934,6 +934,7 @@ static S390PCIBusDevice *s390_pci_device_new(S390pciState *s,
>                                   "zPCI device could not be created: ");
>           return NULL;
>       }
> +    object_property_add_child(OBJECT(s), "zpci[*]", OBJECT(dev));

I think there can only be one zpci device per PCI device, so do we need the 
"[*]" here?

  Thomas

>       if (!qdev_realize_and_unref(dev, BUS(s->bus), &local_err)) {
>           object_unparent(OBJECT(dev));
>           error_propagate_prepend(errp, local_err,

Re: [PATCH 19/21] hw/s390x/zpci-bus: Add QOM parentship relation with zPCI devices

[Philippe Mathieu-Daudé]

On 19/2/24 14:38, Thomas Huth wrote:
> On 16/02/2024 12.03, Philippe Mathieu-Daudé wrote:
>> QDev objects created with qdev_*new() need to manually add
>> their parent relationship with object_property_add_child().
>>
>> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
>> ---
>>   hw/s390x/s390-pci-bus.c | 1 +
>>   1 file changed, 1 insertion(+)
>>
>> diff --git a/hw/s390x/s390-pci-bus.c b/hw/s390x/s390-pci-bus.c
>> index 3e57d5faca..6d07a7b530 100644
>> --- a/hw/s390x/s390-pci-bus.c
>> +++ b/hw/s390x/s390-pci-bus.c
>> @@ -934,6 +934,7 @@ static S390PCIBusDevice 
>> *s390_pci_device_new(S390pciState *s,
>>                                   "zPCI device could not be created: ");
>>           return NULL;
>>       }
>> +    object_property_add_child(OBJECT(s), "zpci[*]", OBJECT(dev));
> 
> I think there can only be one zpci device per PCI device, so do we need 
> the "[*]" here?

Oh I missed that, I'll change, thanks.

Re: [PATCH 01/21] hw/i386/pc: Do not use C99 mixed-declarations style

[Zhao Liu]

Hi Philippe,

On Fri, Feb 16, 2024 at 12:02:52PM +0100, Philippe Mathieu-Daudé wrote:
> Date: Fri, 16 Feb 2024 12:02:52 +0100
> From: Philippe Mathieu-Daudé <philmd@linaro.org>
> Subject: [PATCH 01/21] hw/i386/pc: Do not use C99 mixed-declarations style
> X-Mailer: git-send-email 2.41.0
> 
> QEMU's coding style generally forbids C99 mixed declarations.
> 
> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
> ---
>  hw/i386/pc.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/hw/i386/pc.c b/hw/i386/pc.c
> index 196827531a..3c00a87317 100644
> --- a/hw/i386/pc.c
> +++ b/hw/i386/pc.c
> @@ -1227,6 +1227,7 @@ void pc_basic_device_init(struct PCMachineState *pcms,
>       */
>      if (pcms->hpet_enabled) {
>          qemu_irq rtc_irq;
> +        uint8_t compat;
>  
>          hpet = qdev_try_new(TYPE_HPET);
>          if (!hpet) {
> @@ -1238,8 +1239,7 @@ void pc_basic_device_init(struct PCMachineState *pcms,
>           * use IRQ16~23, IRQ8 and IRQ2.  If the user has already set
>           * the property, use whatever mask they specified.
>           */
> -        uint8_t compat = object_property_get_uint(OBJECT(hpet),
> -                HPET_INTCAP, NULL);
> +        compat = object_property_get_uint(OBJECT(hpet), HPET_INTCAP, NULL);
>          if (!compat) {
>              qdev_prop_set_uint32(hpet, HPET_INTCAP, hpet_irqs);
>          }

"compat" is only used here to check. So, what about getting rid of this
variable?

if (!object_property_get_uint(OBJECT(hpet), HPET_INTCAP, NULL)) {
    qdev_prop_set_uint32(hpet, HPET_INTCAP, hpet_irqs);
}

Re: [PATCH 02/21] hw/i386/pc_sysfw: Use qdev_is_realized() instead of QOM API

[Zhao Liu]

On Fri, Feb 16, 2024 at 12:02:53PM +0100, Philippe Mathieu-Daudé wrote:
> Date: Fri, 16 Feb 2024 12:02:53 +0100
> From: Philippe Mathieu-Daudé <philmd@linaro.org>
> Subject: [PATCH 02/21] hw/i386/pc_sysfw: Use qdev_is_realized() instead of
>  QOM API
> X-Mailer: git-send-email 2.41.0
> 
> Prefer QDev API for QDev objects, avoid the underlying QOM layer.
> 
> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
> ---
>  hw/i386/pc_sysfw.c | 6 ++----
>  1 file changed, 2 insertions(+), 4 deletions(-)

Reviewed-by: Zhao Liu <zhao1.liu@intel.com>

> 
> diff --git a/hw/i386/pc_sysfw.c b/hw/i386/pc_sysfw.c
> index c8d9e71b88..3efabbbab2 100644
> --- a/hw/i386/pc_sysfw.c
> +++ b/hw/i386/pc_sysfw.c
> @@ -107,17 +107,15 @@ void pc_system_flash_cleanup_unused(PCMachineState *pcms)
>  {
>      char *prop_name;
>      int i;
> -    Object *dev_obj;
>  
>      assert(PC_MACHINE_GET_CLASS(pcms)->pci_enabled);
>  
>      for (i = 0; i < ARRAY_SIZE(pcms->flash); i++) {
> -        dev_obj = OBJECT(pcms->flash[i]);
> -        if (!object_property_get_bool(dev_obj, "realized", &error_abort)) {
> +        if (!qdev_is_realized(DEVICE(pcms->flash[i]))) {
>              prop_name = g_strdup_printf("pflash%d", i);
>              object_property_del(OBJECT(pcms), prop_name);
>              g_free(prop_name);
> -            object_unparent(dev_obj);
> +            object_unparent(OBJECT(pcms->flash[i]));
>              pcms->flash[i] = NULL;
>          }
>      }
> -- 
> 2.41.0
> 
> 

Re: [PATCH 17/21] hw/i386/iommu: Prefer object_initialize_child over object_initialize

[Zhao Liu]

Hi Philippe,

On Fri, Feb 16, 2024 at 12:03:08PM +0100, Philippe Mathieu-Daudé wrote:
> Date: Fri, 16 Feb 2024 12:03:08 +0100
> From: Philippe Mathieu-Daudé <philmd@linaro.org>
> Subject: [PATCH 17/21] hw/i386/iommu: Prefer object_initialize_child over
>  object_initialize
> X-Mailer: git-send-email 2.41.0
> 
> When the QOM parent is available, prefer object_initialize_child()
> over object_initialize(), since it create the parent relationship.
> 
> Rename the 'klass' variable as 'obj' since the argument holds a
> reference to an instance object and not a class one.
> 
> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
> ---
>  hw/i386/amd_iommu.c | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/hw/i386/amd_iommu.c b/hw/i386/amd_iommu.c
> index 7329553ad3..c3afbc4130 100644
> --- a/hw/i386/amd_iommu.c
> +++ b/hw/i386/amd_iommu.c
> @@ -1616,11 +1616,11 @@ static const VMStateDescription vmstate_amdvi_sysbus = {
>      .unmigratable = 1
>  };
>  
> -static void amdvi_sysbus_instance_init(Object *klass)
> +static void amdvi_sysbus_instance_init(Object *obj)
>  {
> -    AMDVIState *s = AMD_IOMMU_DEVICE(klass);
> +    AMDVIState *s = AMD_IOMMU_DEVICE(obj);
>  
> -    object_initialize(&s->pci, sizeof(s->pci), TYPE_AMD_IOMMU_PCI);
> +    object_initialize_child(obj, "iommu", &s->pci, TYPE_AMD_IOMMU_PCI);

What about this name "amd-iommu"?

This is more accurate and differentiates it from the other intel-iommu
related implementations.

>  }
>  
>  static void amdvi_sysbus_class_init(ObjectClass *klass, void *data)
> -- 
> 2.41.0
> 
> 

Re: [PATCH 11/21] hw/usb: Add QOM parentship relation with hub devices

[Zhao Liu]

Hi Philippe,

On Fri, Feb 16, 2024 at 12:03:02PM +0100, Philippe Mathieu-Daudé wrote:
> Date: Fri, 16 Feb 2024 12:03:02 +0100
> From: Philippe Mathieu-Daudé <philmd@linaro.org>
> Subject: [PATCH 11/21] hw/usb: Add QOM parentship relation with hub devices
> X-Mailer: git-send-email 2.41.0
> 
> QDev objects created with qdev_*new() need to manually add
> their parent relationship with object_property_add_child().
> 
> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
> ---
>  hw/usb/bus.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/hw/usb/bus.c b/hw/usb/bus.c
> index a599e2552b..baad04f466 100644
> --- a/hw/usb/bus.c
> +++ b/hw/usb/bus.c
> @@ -439,6 +439,7 @@ void usb_claim_port(USBDevice *dev, Error **errp)
>              /* Create a new hub and chain it on */
>              hub = USB_DEVICE(qdev_try_new("usb-hub"));

One additional question comes to mind, should we use the qdev_new()
here?

The difference between qdev_try_new() and qdev_new() is the latter
uses assert() to ensure the passed type exists.

So if we know that type parameter is correct, we should just use
qdev_new().

Only when the caller is not sure whether the type is valid,
qdev_try_new() should be preferred.

Am I understand correctly? ;-)

>              if (hub) {
> +                object_property_add_child(OBJECT(dev), "hub", OBJECT(hub));

From the comment above the code:

/* Create a new hub and chain it on */

this only creates a new usb-hub, should the new usb-hub become the child
object of the original usb-hub?

>                  usb_realize_and_unref(hub, bus, NULL);
>              }
>          }
> -- 
> 2.41.0
> 
> 

Re: [PATCH 06/21] hw: Replace DEVICE(object_new) -> qdev_new()

[Zhao Liu]

On Fri, Feb 16, 2024 at 12:02:57PM +0100, Philippe Mathieu-Daudé wrote:
> Date: Fri, 16 Feb 2024 12:02:57 +0100
> From: Philippe Mathieu-Daudé <philmd@linaro.org>
> Subject: [PATCH 06/21] hw: Replace DEVICE(object_new) -> qdev_new()
> X-Mailer: git-send-email 2.41.0
> 
> Prefer QDev API for QDev objects, avoid the underlying QOM layer.
> 
> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
> ---
>  hw/arm/musicpal.c | 2 +-
>  hw/core/qdev.c    | 2 +-
>  hw/sparc/sun4m.c  | 4 ++--
>  3 files changed, 4 insertions(+), 4 deletions(-)

Reviewed-by: Zhao Liu <zhao1.liu@intel.com>

> 
> diff --git a/hw/arm/musicpal.c b/hw/arm/musicpal.c
> index 2020f73a57..74e4d24aab 100644
> --- a/hw/arm/musicpal.c
> +++ b/hw/arm/musicpal.c
> @@ -1238,7 +1238,7 @@ static void musicpal_init(MachineState *machine)
>                            qdev_get_gpio_in(pic, MP_TIMER4_IRQ), NULL);
>  
>      /* Logically OR both UART IRQs together */
> -    uart_orgate = DEVICE(object_new(TYPE_OR_IRQ));
> +    uart_orgate = qdev_new(TYPE_OR_IRQ);
>      object_property_set_int(OBJECT(uart_orgate), "num-lines", 2, &error_fatal);
>      qdev_realize_and_unref(uart_orgate, NULL, &error_fatal);
>      qdev_connect_gpio_out(uart_orgate, 0,
> diff --git a/hw/core/qdev.c b/hw/core/qdev.c
> index c68d0f7c51..a271380d20 100644
> --- a/hw/core/qdev.c
> +++ b/hw/core/qdev.c
> @@ -171,7 +171,7 @@ DeviceState *qdev_try_new(const char *name)
>      if (!module_object_class_by_name(name)) {
>          return NULL;
>      }
> -    return DEVICE(object_new(name));
> +    return qdev_new(name);
>  }
>  
>  static QTAILQ_HEAD(, DeviceListener) device_listeners
> diff --git a/hw/sparc/sun4m.c b/hw/sparc/sun4m.c
> index d52e6a7213..fedc4b8b3f 100644
> --- a/hw/sparc/sun4m.c
> +++ b/hw/sparc/sun4m.c
> @@ -979,7 +979,7 @@ static void sun4m_hw_init(MachineState *machine)
>      sysbus_mmio_map(s, 0, hwdef->ms_kb_base);
>  
>      /* Logically OR both its IRQs together */
> -    ms_kb_orgate = DEVICE(object_new(TYPE_OR_IRQ));
> +    ms_kb_orgate = qdev_new(TYPE_OR_IRQ);
>      object_property_set_int(OBJECT(ms_kb_orgate), "num-lines", 2, &error_fatal);
>      qdev_realize_and_unref(ms_kb_orgate, NULL, &error_fatal);
>      sysbus_connect_irq(s, 0, qdev_get_gpio_in(ms_kb_orgate, 0));
> @@ -1000,7 +1000,7 @@ static void sun4m_hw_init(MachineState *machine)
>      sysbus_mmio_map(s, 0, hwdef->serial_base);
>  
>      /* Logically OR both its IRQs together */
> -    serial_orgate = DEVICE(object_new(TYPE_OR_IRQ));
> +    serial_orgate = qdev_new(TYPE_OR_IRQ);
>      object_property_set_int(OBJECT(serial_orgate), "num-lines", 2,
>                              &error_fatal);
>      qdev_realize_and_unref(serial_orgate, NULL, &error_fatal);
> -- 
> 2.41.0
> 
> 

Re: [PATCH 09/21] hw/usb: Inline usb_try_new()

[Zhao Liu]

On Fri, Feb 16, 2024 at 12:03:00PM +0100, Philippe Mathieu-Daudé wrote:
> Date: Fri, 16 Feb 2024 12:03:00 +0100
> From: Philippe Mathieu-Daudé <philmd@linaro.org>
> Subject: [PATCH 09/21] hw/usb: Inline usb_try_new()
> X-Mailer: git-send-email 2.41.0
> 
> Inline the single use of usb_try_new().
> 
> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
> ---
>  hw/usb/bus.c | 7 +------
>  1 file changed, 1 insertion(+), 6 deletions(-)

Reviewed-by: Zhao Liu <zhao1.liu@intel.com>

> 
> diff --git a/hw/usb/bus.c b/hw/usb/bus.c
> index 59c39945dd..148224f06a 100644
> --- a/hw/usb/bus.c
> +++ b/hw/usb/bus.c
> @@ -334,11 +334,6 @@ USBDevice *usb_new(const char *name)
>      return USB_DEVICE(qdev_new(name));
>  }
>  
> -static USBDevice *usb_try_new(const char *name)
> -{
> -    return USB_DEVICE(qdev_try_new(name));
> -}
> -
>  bool usb_realize_and_unref(USBDevice *dev, USBBus *bus, Error **errp)
>  {
>      return qdev_realize_and_unref(&dev->qdev, &bus->qbus, errp);
> @@ -447,7 +442,7 @@ void usb_claim_port(USBDevice *dev, Error **errp)
>      } else {
>          if (bus->nfree == 1 && strcmp(object_get_typename(OBJECT(dev)), "usb-hub") != 0) {
>              /* Create a new hub and chain it on */
> -            hub = usb_try_new("usb-hub");
> +            hub = USB_DEVICE(qdev_try_new("usb-hub"));
>              if (hub) {
>                  usb_realize_and_unref(hub, bus, NULL);
>              }
> -- 
> 2.41.0
> 
> 

Re: [PATCH 07/21] target: Replace DEVICE(object_new) -> qdev_new()

[Zhao Liu]

On Fri, Feb 16, 2024 at 12:02:58PM +0100, Philippe Mathieu-Daudé wrote:
> Date: Fri, 16 Feb 2024 12:02:58 +0100
> From: Philippe Mathieu-Daudé <philmd@linaro.org>
> Subject: [PATCH 07/21] target: Replace DEVICE(object_new) -> qdev_new()
> X-Mailer: git-send-email 2.41.0
> 
> Prefer QDev API for QDev objects, avoid the underlying QOM layer.
> 
> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
> ---
>  target/mips/cpu.c   | 2 +-
>  target/xtensa/cpu.c | 2 +-
>  2 files changed, 2 insertions(+), 2 deletions(-)

Reviewed-by: Zhao Liu <zhao1.liu@intel.com>

> 
> diff --git a/target/mips/cpu.c b/target/mips/cpu.c
> index d644adbc77..6b3909ee08 100644
> --- a/target/mips/cpu.c
> +++ b/target/mips/cpu.c
> @@ -649,7 +649,7 @@ MIPSCPU *mips_cpu_create_with_clock(const char *cpu_type, Clock *cpu_refclk)
>  {
>      DeviceState *cpu;
>  
> -    cpu = DEVICE(object_new(cpu_type));
> +    cpu = qdev_new(cpu_type);
>      qdev_connect_clock_in(cpu, "clk-in", cpu_refclk);
>      qdev_realize(cpu, NULL, &error_abort);
>  
> diff --git a/target/xtensa/cpu.c b/target/xtensa/cpu.c
> index 79f91819df..4f9408e1a0 100644
> --- a/target/xtensa/cpu.c
> +++ b/target/xtensa/cpu.c
> @@ -205,7 +205,7 @@ XtensaCPU *xtensa_cpu_create_with_clock(const char *cpu_type, Clock *cpu_refclk)
>  {
>      DeviceState *cpu;
>  
> -    cpu = DEVICE(object_new(cpu_type));
> +    cpu = qdev_new(cpu_type);
>      qdev_connect_clock_in(cpu, "clk-in", cpu_refclk);
>      qdev_realize(cpu, NULL, &error_abort);
>  
> -- 
> 2.41.0
> 
> 

Re: [PATCH 10/21] hw/usb: Inline usb_new()

[Zhao Liu]

On Fri, Feb 16, 2024 at 12:03:01PM +0100, Philippe Mathieu-Daudé wrote:
> Date: Fri, 16 Feb 2024 12:03:01 +0100
> From: Philippe Mathieu-Daudé <philmd@linaro.org>
> Subject: [PATCH 10/21] hw/usb: Inline usb_new()
> X-Mailer: git-send-email 2.41.0
> 
> Inline the 2 uses of usb_new().
> 
> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
> ---
>  include/hw/usb.h    | 1 -
>  hw/usb/bus.c        | 9 ++-------
>  hw/usb/dev-serial.c | 2 +-
>  3 files changed, 3 insertions(+), 9 deletions(-)

Reviewed-by: Zhao Liu <zhao1.liu@intel.com>

> 
> diff --git a/include/hw/usb.h b/include/hw/usb.h
> index 32c23a5ca2..2d820685cc 100644
> --- a/include/hw/usb.h
> +++ b/include/hw/usb.h
> @@ -500,7 +500,6 @@ void usb_bus_release(USBBus *bus);
>  USBBus *usb_bus_find(int busnr);
>  void usb_legacy_register(const char *typename, const char *usbdevice_name,
>                           USBDevice *(*usbdevice_init)(void));
> -USBDevice *usb_new(const char *name);
>  bool usb_realize_and_unref(USBDevice *dev, USBBus *bus, Error **errp);
>  USBDevice *usb_create_simple(USBBus *bus, const char *name);
>  USBDevice *usbdevice_create(const char *cmdline);
> diff --git a/hw/usb/bus.c b/hw/usb/bus.c
> index 148224f06a..a599e2552b 100644
> --- a/hw/usb/bus.c
> +++ b/hw/usb/bus.c
> @@ -329,11 +329,6 @@ void usb_legacy_register(const char *typename, const char *usbdevice_name,
>      }
>  }
>  
> -USBDevice *usb_new(const char *name)
> -{
> -    return USB_DEVICE(qdev_new(name));
> -}
> -
>  bool usb_realize_and_unref(USBDevice *dev, USBBus *bus, Error **errp)
>  {
>      return qdev_realize_and_unref(&dev->qdev, &bus->qbus, errp);
> @@ -341,7 +336,7 @@ bool usb_realize_and_unref(USBDevice *dev, USBBus *bus, Error **errp)
>  
>  USBDevice *usb_create_simple(USBBus *bus, const char *name)
>  {
> -    USBDevice *dev = usb_new(name);
> +    USBDevice *dev = USB_DEVICE(qdev_new(name));
>  
>      usb_realize_and_unref(dev, bus, &error_abort);
>      return dev;
> @@ -693,7 +688,7 @@ USBDevice *usbdevice_create(const char *driver)
>          return NULL;
>      }
>  
> -    dev = f->usbdevice_init ? f->usbdevice_init() : usb_new(f->name);
> +    dev = f->usbdevice_init ? f->usbdevice_init() : USB_DEVICE(qdev_new(f->name));
>      if (!dev) {
>          error_report("Failed to create USB device '%s'", f->name);
>          return NULL;
> diff --git a/hw/usb/dev-serial.c b/hw/usb/dev-serial.c
> index 63047d79cf..6e79c46d53 100644
> --- a/hw/usb/dev-serial.c
> +++ b/hw/usb/dev-serial.c
> @@ -624,7 +624,7 @@ static USBDevice *usb_braille_init(void)
>          return NULL;
>      }
>  
> -    dev = usb_new("usb-braille");
> +    dev = USB_DEVICE(qdev_new("usb-braille"));
>      qdev_prop_set_chr(&dev->qdev, "chardev", cdrv);
>      return dev;
>  }
> -- 
> 2.41.0
> 
> 

Re: [PATCH 03/21] hw/ppc/spapr_cpu: Use qdev_is_realized() instead of QOM API

[Zhao Liu]

On Fri, Feb 16, 2024 at 12:02:54PM +0100, Philippe Mathieu-Daudé wrote:
> Date: Fri, 16 Feb 2024 12:02:54 +0100
> From: Philippe Mathieu-Daudé <philmd@linaro.org>
> Subject: [PATCH 03/21] hw/ppc/spapr_cpu: Use qdev_is_realized() instead of
>  QOM API
> X-Mailer: git-send-email 2.41.0
> 
> Prefer QDev API for QDev objects, avoid the underlying QOM layer.
> 
> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
> ---
>  hw/ppc/spapr_cpu_core.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)

Reviewed-by: Zhao Liu <zhao1.liu@intel.com>

> 
> diff --git a/hw/ppc/spapr_cpu_core.c b/hw/ppc/spapr_cpu_core.c
> index 0c0fb3f1b0..40b7c52f7f 100644
> --- a/hw/ppc/spapr_cpu_core.c
> +++ b/hw/ppc/spapr_cpu_core.c
> @@ -245,8 +245,7 @@ static void spapr_cpu_core_unrealize(DeviceState *dev)
>               * spapr_cpu_core_realize(), make sure we only unrealize
>               * vCPUs that have already been realized.
>               */
> -            if (object_property_get_bool(OBJECT(sc->threads[i]), "realized",
> -                                         &error_abort)) {
> +            if (qdev_is_realized(DEVICE(sc->threads[i]))) {
>                  spapr_unrealize_vcpu(sc->threads[i], sc);
>              }
>              spapr_delete_vcpu(sc->threads[i]);
> -- 
> 2.41.0
> 
> 

Re: [PATCH 21/21] hw: Add QOM parentship relation with CPUs

[Zhao Liu]

On Fri, Feb 16, 2024 at 12:03:12PM +0100, Philippe Mathieu-Daudé wrote:
> Date: Fri, 16 Feb 2024 12:03:12 +0100
> From: Philippe Mathieu-Daudé <philmd@linaro.org>
> Subject: [PATCH 21/21] hw: Add QOM parentship relation with CPUs
> X-Mailer: git-send-email 2.41.0
> 
> QDev objects created with object_new() need to manually add
> their parent relationship with object_property_add_child().
> 
> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
> ---
>  hw/i386/x86.c                            | 1 +
>  hw/microblaze/petalogix_ml605_mmu.c      | 1 +
>  hw/microblaze/petalogix_s3adsp1800_mmu.c | 1 +
>  hw/mips/cps.c                            | 1 +
>  hw/nios2/10m50_devboard.c                | 1 +
>  hw/ppc/e500.c                            | 1 +
>  hw/ppc/spapr.c                           | 1 +
>  7 files changed, 7 insertions(+)

Reviewed-by: Zhao Liu <zhao1.liu@intel.com>

> 
> diff --git a/hw/i386/x86.c b/hw/i386/x86.c
> index 684dce90e9..7021419d91 100644
> --- a/hw/i386/x86.c
> +++ b/hw/i386/x86.c
> @@ -102,6 +102,7 @@ void x86_cpu_new(X86MachineState *x86ms, int64_t apic_id, Error **errp)
>      if (!object_property_set_uint(cpu, "apic-id", apic_id, errp)) {
>          goto out;
>      }
> +    object_property_add_child(OBJECT(x86ms), "cpu[*]", OBJECT(cpu));
>      qdev_realize(DEVICE(cpu), NULL, errp);
>  
>  out:
> diff --git a/hw/microblaze/petalogix_ml605_mmu.c b/hw/microblaze/petalogix_ml605_mmu.c
> index 0f5fabc32e..dfd881322d 100644
> --- a/hw/microblaze/petalogix_ml605_mmu.c
> +++ b/hw/microblaze/petalogix_ml605_mmu.c
> @@ -83,6 +83,7 @@ petalogix_ml605_init(MachineState *machine)
>  
>      /* init CPUs */
>      cpu = MICROBLAZE_CPU(object_new(TYPE_MICROBLAZE_CPU));
> +    object_property_add_child(OBJECT(machine), "cpu", OBJECT(cpu));
>      object_property_set_str(OBJECT(cpu), "version", "8.10.a", &error_abort);
>      /* Use FPU but don't use floating point conversion and square
>       * root instructions
> diff --git a/hw/microblaze/petalogix_s3adsp1800_mmu.c b/hw/microblaze/petalogix_s3adsp1800_mmu.c
> index dad46bd7f9..255d8d4d47 100644
> --- a/hw/microblaze/petalogix_s3adsp1800_mmu.c
> +++ b/hw/microblaze/petalogix_s3adsp1800_mmu.c
> @@ -70,6 +70,7 @@ petalogix_s3adsp1800_init(MachineState *machine)
>      MemoryRegion *sysmem = get_system_memory();
>  
>      cpu = MICROBLAZE_CPU(object_new(TYPE_MICROBLAZE_CPU));
> +    object_property_add_child(OBJECT(machine), "cpu", OBJECT(cpu));
>      object_property_set_str(OBJECT(cpu), "version", "7.10.d", &error_abort);
>      qdev_realize(DEVICE(cpu), NULL, &error_abort);
>  
> diff --git a/hw/mips/cps.c b/hw/mips/cps.c
> index 07b73b0a1f..6b4e918807 100644
> --- a/hw/mips/cps.c
> +++ b/hw/mips/cps.c
> @@ -84,6 +84,7 @@ static void mips_cps_realize(DeviceState *dev, Error **errp)
>          /* All cores use the same clock tree */
>          qdev_connect_clock_in(DEVICE(cpu), "clk-in", s->clock);
>  
> +        object_property_add_child(OBJECT(dev), "cpu[*]", OBJECT(cpu));
>          if (!qdev_realize_and_unref(DEVICE(cpu), NULL, errp)) {
>              return;
>          }
> diff --git a/hw/nios2/10m50_devboard.c b/hw/nios2/10m50_devboard.c
> index 6cb32f777b..f6a691d340 100644
> --- a/hw/nios2/10m50_devboard.c
> +++ b/hw/nios2/10m50_devboard.c
> @@ -95,6 +95,7 @@ static void nios2_10m50_ghrd_init(MachineState *machine)
>      cpu->exception_addr = 0xc8000120;
>      cpu->fast_tlb_miss_addr = 0xc0000100;
>  
> +    object_property_add_child(OBJECT(machine), "cpu", OBJECT(cpu));
>      qdev_realize_and_unref(DEVICE(cpu), NULL, &error_fatal);
>  
>      if (nms->vic) {
> diff --git a/hw/ppc/e500.c b/hw/ppc/e500.c
> index 3bd12b54ab..77b7d2858c 100644
> --- a/hw/ppc/e500.c
> +++ b/hw/ppc/e500.c
> @@ -956,6 +956,7 @@ void ppce500_init(MachineState *machine)
>           */
>          object_property_set_bool(OBJECT(cs), "start-powered-off", i != 0,
>                                   &error_abort);
> +        object_property_add_child(OBJECT(machine), "cpu[*]", OBJECT(cpu));
>          qdev_realize_and_unref(DEVICE(cs), NULL, &error_fatal);
>  
>          if (!firstenv) {
> diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
> index 0d72d286d8..b6e5caa0d2 100644
> --- a/hw/ppc/spapr.c
> +++ b/hw/ppc/spapr.c
> @@ -2715,6 +2715,7 @@ static void spapr_init_cpus(SpaprMachineState *spapr)
>                                      &error_fatal);
>              object_property_set_int(core, CPU_CORE_PROP_CORE_ID, core_id,
>                                      &error_fatal);
> +            object_property_add_child(OBJECT(spapr), "cpu[*]", OBJECT(core));
>              qdev_realize(DEVICE(core), NULL, &error_fatal);
>  
>              object_unref(core);
> -- 
> 2.41.0
> 
> 

Re: [PATCH 01/21] hw/i386/pc: Do not use C99 mixed-declarations style

[Philippe Mathieu-Daudé]

On 22/2/24 10:12, Zhao Liu wrote:
> Hi Philippe,
> 
> On Fri, Feb 16, 2024 at 12:02:52PM +0100, Philippe Mathieu-Daudé wrote:
>> Date: Fri, 16 Feb 2024 12:02:52 +0100
>> From: Philippe Mathieu-Daudé <philmd@linaro.org>
>> Subject: [PATCH 01/21] hw/i386/pc: Do not use C99 mixed-declarations style
>> X-Mailer: git-send-email 2.41.0
>>
>> QEMU's coding style generally forbids C99 mixed declarations.
>>
>> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
>> ---
>>   hw/i386/pc.c | 4 ++--
>>   1 file changed, 2 insertions(+), 2 deletions(-)
>>
>> diff --git a/hw/i386/pc.c b/hw/i386/pc.c
>> index 196827531a..3c00a87317 100644
>> --- a/hw/i386/pc.c
>> +++ b/hw/i386/pc.c
>> @@ -1227,6 +1227,7 @@ void pc_basic_device_init(struct PCMachineState *pcms,
>>        */
>>       if (pcms->hpet_enabled) {
>>           qemu_irq rtc_irq;
>> +        uint8_t compat;
>>   
>>           hpet = qdev_try_new(TYPE_HPET);
>>           if (!hpet) {
>> @@ -1238,8 +1239,7 @@ void pc_basic_device_init(struct PCMachineState *pcms,
>>            * use IRQ16~23, IRQ8 and IRQ2.  If the user has already set
>>            * the property, use whatever mask they specified.
>>            */
>> -        uint8_t compat = object_property_get_uint(OBJECT(hpet),
>> -                HPET_INTCAP, NULL);
>> +        compat = object_property_get_uint(OBJECT(hpet), HPET_INTCAP, NULL);
>>           if (!compat) {
>>               qdev_prop_set_uint32(hpet, HPET_INTCAP, hpet_irqs);
>>           }
> 
> "compat" is only used here to check. So, what about getting rid of this
> variable?
> 
> if (!object_property_get_uint(OBJECT(hpet), HPET_INTCAP, NULL)) {
>      qdev_prop_set_uint32(hpet, HPET_INTCAP, hpet_irqs);
> }

Ah yeah, I didn't noticed, thanks!

Re: [PATCH 16/21] hw/net/can/versal: Prefer object_initialize_child over object_initialize

[Francisco Iglesias]

On 2024-02-16 12:03, Philippe Mathieu-Daudé wrote:
> When the QOM parent is available, prefer object_initialize_child()
> over object_initialize(), since it create the parent relationship.
> 
> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>

Reviewed-by: Francisco Iglesias <francisco.iglesias@amd.com>


> ---
>   hw/net/can/xlnx-versal-canfd.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/hw/net/can/xlnx-versal-canfd.c b/hw/net/can/xlnx-versal-canfd.c
> index 47a14cfe63..f8e4bd75e4 100644
> --- a/hw/net/can/xlnx-versal-canfd.c
> +++ b/hw/net/can/xlnx-versal-canfd.c
> @@ -1900,7 +1900,7 @@ static int canfd_populate_regarray(XlnxVersalCANFDState *s,
>           int index = rae[i].addr / 4;
>           RegisterInfo *r = &s->reg_info[index];
>   
> -        object_initialize(r, sizeof(*r), TYPE_REGISTER);
> +        object_initialize_child(OBJECT(s), "reg[*]", r, TYPE_REGISTER);
>   
>           *r = (RegisterInfo) {
>               .data = &s->regs[index],

Re: [PATCH 16/21] hw/net/can/versal: Prefer object_initialize_child over object_initialize

[Pavel Pisa via]

On Friday 23 of February 2024 12:06:34 Francisco Iglesias wrote:
> On 2024-02-16 12:03, Philippe Mathieu-Daudé wrote:
> > When the QOM parent is available, prefer object_initialize_child()
> > over object_initialize(), since it create the parent relationship.
> >
> > Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
>
> Reviewed-by: Francisco Iglesias <francisco.iglesias@amd.com>

Reviewed-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>

Re: [PATCH 00/21] hw: More QDev cleanups

[Philippe Mathieu-Daudé]

On 16/2/24 12:02, Philippe Mathieu-Daudé wrote:
> Various QDev cleanups extracted to my "enforce QDev API" branch.
> - When available, instead of plain QOM, use QDev API equivalent
> - Add missing QOM parentship for some obj created with qdev_*new()
> - Prefer object_initialize_child() over object_initialize()
> 
> Philippe Mathieu-Daudé (21):

>    hw: Replace DEVICE(object_new) -> qdev_new()
>    target: Replace DEVICE(object_new) -> qdev_new()

>    hw/usb: Inline usb_try_new()
>    hw/usb: Inline usb_new()

>    hw/net/can/versal: Prefer object_initialize_child over
>      object_initialize

>    hw: Add QOM parentship relation with CPUs

Queuing reviewed patches.

Re: [PATCH 16/21] hw/net/can/versal: Prefer object_initialize_child over object_initialize

[Peter Maydell]

On Fri, 16 Feb 2024 at 11:08, Philippe Mathieu-Daudé <philmd@linaro.org> wrote:
>
> When the QOM parent is available, prefer object_initialize_child()
> over object_initialize(), since it create the parent relationship.
>
> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
> ---
>  hw/net/can/xlnx-versal-canfd.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/hw/net/can/xlnx-versal-canfd.c b/hw/net/can/xlnx-versal-canfd.c
> index 47a14cfe63..f8e4bd75e4 100644
> --- a/hw/net/can/xlnx-versal-canfd.c
> +++ b/hw/net/can/xlnx-versal-canfd.c
> @@ -1900,7 +1900,7 @@ static int canfd_populate_regarray(XlnxVersalCANFDState *s,
>          int index = rae[i].addr / 4;
>          RegisterInfo *r = &s->reg_info[index];
>
> -        object_initialize(r, sizeof(*r), TYPE_REGISTER);
> +        object_initialize_child(OBJECT(s), "reg[*]", r, TYPE_REGISTER);
>
>          *r = (RegisterInfo) {
>              .data = &s->regs[index],
> --

Hi -- I was just looking at this function since ASAN
reports a leak in it. I notice that this patch never got
applied -- any reason why?

Also, though, we call object_initialize(r, ...) and then
we immediately do "*r = { some struct }" which entirely
overwrites the initialization we just did. I guess that
should instead be initializing the individual fields...

-- PMM