[PATCH-for-9.0 v2 0/8] hw: Simplify accesses to CPUState::'start-powered-off' property

[PATCH-for-9.0 v2 0/8] hw: Simplify accesses to CPUState::'start-powered-off' property

[Philippe Mathieu-Daudé]

Extracted from a bigger series, after Markus' review.

Supersedes: <20231122183633.17676-1-philmd@linaro.org>
Supersedes: <20231122183048.17150-8-philmd@linaro.org>

Philippe Mathieu-Daudé (8):
  hw/ppc/spapr_cpu_core: Access QDev properties with proper API
  hw/arm/bcm2836: Simplify use of 'reset-cbar' property
  hw/arm/bcm2836: Use ARM_CPU 'mp-affinity' property
  hw: Simplify accesses to the CPUState::'start-powered-off' property
  hw: Prefer qdev_prop_set_bit over object_property_set_bool for QDev
  hw: Simplify uses of qdev_prop_set_bit(dev, 'start-powered-off')
  hw/arm/bcm2836: Move code after error checks
  hw/arm/bcm2836: Add local variable to remove various DEVICE() casts

 hw/acpi/cpu_hotplug.c               |  7 ++--
 hw/acpi/ich9.c                      |  4 +--
 hw/acpi/piix4.c                     |  4 +--
 hw/arm/allwinner-h3.c               |  3 +-
 hw/arm/allwinner-r40.c              |  3 +-
 hw/arm/armsse.c                     |  5 +--
 hw/arm/armv7m.c                     |  7 +---
 hw/arm/aspeed_ast2400.c             |  3 +-
 hw/arm/aspeed_ast2600.c             |  9 ++---
 hw/arm/bcm2835_peripherals.c        |  3 +-
 hw/arm/bcm2836.c                    | 51 +++++++++++++----------------
 hw/arm/boot.c                       |  4 +--
 hw/arm/fsl-imx25.c                  |  3 +-
 hw/arm/fsl-imx31.c                  |  3 +-
 hw/arm/fsl-imx6.c                   | 14 +++-----
 hw/arm/fsl-imx6ul.c                 |  8 ++---
 hw/arm/fsl-imx7.c                   | 20 +++++------
 hw/arm/npcm7xx.c                    |  9 ++---
 hw/arm/xlnx-versal.c                |  9 ++---
 hw/arm/xlnx-zynqmp.c                |  9 ++---
 hw/core/bus.c                       |  2 +-
 hw/core/qdev.c                      |  2 +-
 hw/i386/pc_piix.c                   | 19 ++++-------
 hw/microblaze/petalogix_ml605_mmu.c |  5 ++-
 hw/microblaze/xlnx-zynqmp-pmu.c     | 18 ++++------
 hw/mips/cps.c                       |  6 ++--
 hw/ppc/e500.c                       |  3 +-
 hw/ppc/spapr_cpu_core.c             |  2 +-
 hw/ppc/spapr_pci.c                  |  3 +-
 hw/rx/rx-gdbsim.c                   |  4 +--
 hw/sparc/sun4m.c                    |  3 +-
 31 files changed, 93 insertions(+), 152 deletions(-)

-- 
2.41.0

[PATCH-for-9.0 v2 1/8] hw/ppc/spapr_cpu_core: Access QDev properties with proper API

[Philippe Mathieu-Daudé]

CPUState::start_powered_off field is part of the internal
implementation of a QDev CPU. It is exposed as the QDev
"start-powered-off" property. External components should
use the qdev properties API to access it.

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

diff --git a/hw/ppc/spapr_cpu_core.c b/hw/ppc/spapr_cpu_core.c
index 91fae56573..24f759ba26 100644
--- a/hw/ppc/spapr_cpu_core.c
+++ b/hw/ppc/spapr_cpu_core.c
@@ -306,7 +306,7 @@ static PowerPCCPU *spapr_create_vcpu(SpaprCpuCore *sc, int i, Error **errp)
      * All CPUs start halted. CPU0 is unhalted from the machine level reset code
      * and the rest are explicitly started up by the guest using an RTAS call.
      */
-    cs->start_powered_off = true;
+    qdev_prop_set_bit(DEVICE(obj), "start-powered-off", true);
     cs->cpu_index = cc->core_id + i;
     if (!spapr_set_vcpu_id(cpu, cs->cpu_index, errp)) {
         return NULL;
-- 
2.41.0

Re: [PATCH-for-9.0 v2 1/8] hw/ppc/spapr_cpu_core: Access QDev properties with proper API

[Harsh Prateek Bora]

On 11/23/23 20:08, Philippe Mathieu-Daudé wrote:
> CPUState::start_powered_off field is part of the internal
> implementation of a QDev CPU. It is exposed as the QDev
> "start-powered-off" property. External components should
> use the qdev properties API to access it.
> 
> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>

Reviewed-by: Harsh Prateek Bora <harshpb@linux.ibm.com>

> ---
>   hw/ppc/spapr_cpu_core.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/hw/ppc/spapr_cpu_core.c b/hw/ppc/spapr_cpu_core.c
> index 91fae56573..24f759ba26 100644
> --- a/hw/ppc/spapr_cpu_core.c
> +++ b/hw/ppc/spapr_cpu_core.c
> @@ -306,7 +306,7 @@ static PowerPCCPU *spapr_create_vcpu(SpaprCpuCore *sc, int i, Error **errp)
>        * All CPUs start halted. CPU0 is unhalted from the machine level reset code
>        * and the rest are explicitly started up by the guest using an RTAS call.
>        */
> -    cs->start_powered_off = true;
> +    qdev_prop_set_bit(DEVICE(obj), "start-powered-off", true);
>       cs->cpu_index = cc->core_id + i;
>       if (!spapr_set_vcpu_id(cpu, cs->cpu_index, errp)) {
>           return NULL;

[PATCH-for-9.0 v2 2/8] hw/arm/bcm2836: Simplify use of 'reset-cbar' property

[Philippe Mathieu-Daudé]

bcm2836_realize() is called by

 - bcm2836_class_init() which sets:

    bc->cpu_type = ARM_CPU_TYPE_NAME("cortex-a7")

 - bcm2837_class_init() which sets:

    bc->cpu_type = ARM_CPU_TYPE_NAME("cortex-a53")

Both Cortex-A7 / A53 have the ARM_FEATURE_CBAR set. If it isn't,
then this is a programming error: use &error_abort.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 hw/arm/bcm2836.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/hw/arm/bcm2836.c b/hw/arm/bcm2836.c
index 166dc896c0..a1bd1406e1 100644
--- a/hw/arm/bcm2836.c
+++ b/hw/arm/bcm2836.c
@@ -131,10 +131,8 @@ static void bcm2836_realize(DeviceState *dev, Error **errp)
         s->cpu[n].core.mp_affinity = (bc->clusterid << 8) | n;
 
         /* set periphbase/CBAR value for CPU-local registers */
-        if (!object_property_set_int(OBJECT(&s->cpu[n].core), "reset-cbar",
-                                     bc->peri_base, errp)) {
-            return;
-        }
+        object_property_set_int(OBJECT(&s->cpu[n].core), "reset-cbar",
+                                bc->peri_base, &error_abort);
 
         /* start powered off if not enabled */
         if (!object_property_set_bool(OBJECT(&s->cpu[n].core),
-- 
2.41.0

Re: [PATCH-for-9.0 v2 2/8] hw/arm/bcm2836: Simplify use of 'reset-cbar' property

[Peter Maydell]

On Thu, 23 Nov 2023 at 14:38, Philippe Mathieu-Daudé <philmd@linaro.org> wrote:
>
> bcm2836_realize() is called by
>
>  - bcm2836_class_init() which sets:
>
>     bc->cpu_type = ARM_CPU_TYPE_NAME("cortex-a7")
>
>  - bcm2837_class_init() which sets:
>
>     bc->cpu_type = ARM_CPU_TYPE_NAME("cortex-a53")
>
> Both Cortex-A7 / A53 have the ARM_FEATURE_CBAR set. If it isn't,
> then this is a programming error: use &error_abort.
>
> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
> ---

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>

thanks
-- PMM

[PATCH-for-9.0 v2 3/8] hw/arm/bcm2836: Use ARM_CPU 'mp-affinity' property

[Philippe Mathieu-Daudé]

The 'mp-affinity' property is present since commit 15a21fe028
("target-arm: Add mp-affinity property for ARM CPU class").
Use it and remove a /* TODO */ comment. Since all ARM CPUs
have this property, use &error_abort, because this call can
not fail.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 hw/arm/bcm2836.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/hw/arm/bcm2836.c b/hw/arm/bcm2836.c
index a1bd1406e1..289c30e6b6 100644
--- a/hw/arm/bcm2836.c
+++ b/hw/arm/bcm2836.c
@@ -127,8 +127,8 @@ static void bcm2836_realize(DeviceState *dev, Error **errp)
         qdev_get_gpio_in_named(DEVICE(&s->control), "gpu-fiq", 0));
 
     for (n = 0; n < BCM283X_NCPUS; n++) {
-        /* TODO: this should be converted to a property of ARM_CPU */
-        s->cpu[n].core.mp_affinity = (bc->clusterid << 8) | n;
+        object_property_set_int(OBJECT(&s->cpu[n].core), "mp-affinity",
+                                (bc->clusterid << 8) | n, &error_abort);
 
         /* set periphbase/CBAR value for CPU-local registers */
         object_property_set_int(OBJECT(&s->cpu[n].core), "reset-cbar",
-- 
2.41.0

Re: [PATCH-for-9.0 v2 3/8] hw/arm/bcm2836: Use ARM_CPU 'mp-affinity' property

[Peter Maydell]

On Thu, 23 Nov 2023 at 14:38, Philippe Mathieu-Daudé <philmd@linaro.org> wrote:
>
> The 'mp-affinity' property is present since commit 15a21fe028
> ("target-arm: Add mp-affinity property for ARM CPU class").
> Use it and remove a /* TODO */ comment. Since all ARM CPUs
> have this property, use &error_abort, because this call can
> not fail.
>
> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>

thanks
-- PMM

[PATCH-for-9.0 v2 4/8] hw: Simplify accesses to the CPUState::'start-powered-off' property

[Philippe Mathieu-Daudé]

The 'start-powered-off' property has been added to ARM CPUs in
commit 5de164304a ("arm: Allow secondary KVM CPUs to be booted
via PSCI"), then eventually got generalized to all CPUs in commit
c1b701587e ("target/arm: Move start-powered-off property to generic
CPUState"). Since all CPUs have it, no need to check whether it is
available. Updating this property can't fail, so use &error_abort.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 hw/arm/armsse.c  | 6 ++----
 hw/arm/armv7m.c  | 8 ++------
 hw/arm/bcm2836.c | 8 ++------
 hw/mips/cps.c    | 7 +++----
 hw/ppc/e500.c    | 2 +-
 hw/sparc/sun4m.c | 2 +-
 6 files changed, 11 insertions(+), 22 deletions(-)

diff --git a/hw/arm/armsse.c b/hw/arm/armsse.c
index 31acbf7347..4672df180f 100644
--- a/hw/arm/armsse.c
+++ b/hw/arm/armsse.c
@@ -1022,10 +1022,8 @@ static void armsse_realize(DeviceState *dev, Error **errp)
          * later if necessary.
          */
         if (extract32(info->cpuwait_rst, i, 1)) {
-            if (!object_property_set_bool(cpuobj, "start-powered-off", true,
-                                          errp)) {
-                return;
-            }
+            object_property_set_bool(cpuobj, "start-powered-off", true,
+                                     &error_abort);
         }
         if (!s->cpu_fpu[i]) {
             if (!object_property_set_bool(cpuobj, "vfp", false, errp)) {
diff --git a/hw/arm/armv7m.c b/hw/arm/armv7m.c
index d10abb36a8..cbaebe9bf8 100644
--- a/hw/arm/armv7m.c
+++ b/hw/arm/armv7m.c
@@ -318,12 +318,6 @@ static void armv7m_realize(DeviceState *dev, Error **errp)
             return;
         }
     }
-    if (object_property_find(OBJECT(s->cpu), "start-powered-off")) {
-        if (!object_property_set_bool(OBJECT(s->cpu), "start-powered-off",
-                                      s->start_powered_off, errp)) {
-            return;
-        }
-    }
     if (object_property_find(OBJECT(s->cpu), "vfp")) {
         if (!object_property_set_bool(OBJECT(s->cpu), "vfp", s->vfp, errp)) {
             return;
@@ -334,6 +328,8 @@ static void armv7m_realize(DeviceState *dev, Error **errp)
             return;
         }
     }
+    object_property_set_bool(OBJECT(s->cpu), "start-powered-off",
+                             s->start_powered_off, &error_abort);
 
     /*
      * Real M-profile hardware can be configured with a different number of
diff --git a/hw/arm/bcm2836.c b/hw/arm/bcm2836.c
index 289c30e6b6..b0674a22a6 100644
--- a/hw/arm/bcm2836.c
+++ b/hw/arm/bcm2836.c
@@ -135,12 +135,8 @@ static void bcm2836_realize(DeviceState *dev, Error **errp)
                                 bc->peri_base, &error_abort);
 
         /* start powered off if not enabled */
-        if (!object_property_set_bool(OBJECT(&s->cpu[n].core),
-                                      "start-powered-off",
-                                      n >= s->enabled_cpus,
-                                      errp)) {
-            return;
-        }
+        object_property_set_bool(OBJECT(&s->cpu[n].core), "start-powered-off",
+                                 n >= s->enabled_cpus, &error_abort);
 
         if (!qdev_realize(DEVICE(&s->cpu[n].core), NULL, errp)) {
             return;
diff --git a/hw/mips/cps.c b/hw/mips/cps.c
index b6612c1762..4f12e23ab5 100644
--- a/hw/mips/cps.c
+++ b/hw/mips/cps.c
@@ -78,10 +78,9 @@ static void mips_cps_realize(DeviceState *dev, Error **errp)
         CPUMIPSState *env = &cpu->env;
 
         /* All VPs are halted on reset. Leave powering up to CPC. */
-        if (!object_property_set_bool(OBJECT(cpu), "start-powered-off", true,
-                                      errp)) {
-            return;
-        }
+        object_property_set_bool(OBJECT(cpu), "start-powered-off", true,
+                                 &error_abort);
+
         /* All cores use the same clock tree */
         qdev_connect_clock_in(DEVICE(cpu), "clk-in", s->clock);
 
diff --git a/hw/ppc/e500.c b/hw/ppc/e500.c
index 384226296b..566f1200dd 100644
--- a/hw/ppc/e500.c
+++ b/hw/ppc/e500.c
@@ -955,7 +955,7 @@ void ppce500_init(MachineState *machine)
          * when implementing non-kernel boot.
          */
         object_property_set_bool(OBJECT(cs), "start-powered-off", i != 0,
-                                 &error_fatal);
+                                 &error_abort);
         qdev_realize_and_unref(DEVICE(cs), NULL, &error_fatal);
 
         if (!firstenv) {
diff --git a/hw/sparc/sun4m.c b/hw/sparc/sun4m.c
index 17bf5f2879..64895aebe3 100644
--- a/hw/sparc/sun4m.c
+++ b/hw/sparc/sun4m.c
@@ -804,7 +804,7 @@ static void cpu_devinit(const char *cpu_type, unsigned int id,
 
     qemu_register_reset(sun4m_cpu_reset, cpu);
     object_property_set_bool(OBJECT(cpu), "start-powered-off", id != 0,
-                             &error_fatal);
+                             &error_abort);
     qdev_realize_and_unref(DEVICE(cpu), NULL, &error_fatal);
     cpu_sparc_set_id(env, id);
     *cpu_irqs = qemu_allocate_irqs(cpu_set_irq, cpu, MAX_PILS);
-- 
2.41.0

Re: [PATCH-for-9.0 v2 4/8] hw: Simplify accesses to the CPUState::'start-powered-off' property

[Peter Maydell]

On Thu, 23 Nov 2023 at 14:38, Philippe Mathieu-Daudé <philmd@linaro.org> wrote:
>
> The 'start-powered-off' property has been added to ARM CPUs in
> commit 5de164304a ("arm: Allow secondary KVM CPUs to be booted
> via PSCI"), then eventually got generalized to all CPUs in commit
> c1b701587e ("target/arm: Move start-powered-off property to generic
> CPUState"). Since all CPUs have it, no need to check whether it is
> available. Updating this property can't fail, so use &error_abort.
>
> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
> ---
>  hw/arm/armsse.c  | 6 ++----

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>

thanks
-- PMM

[PATCH-for-9.0 v2 5/8] hw: Prefer qdev_prop_set_bit over object_property_set_bool for QDev

[Philippe Mathieu-Daudé]

The QOM API is lower level than the QDev one. When an instance is
QDev and setting the property can not fail (using &error_abort),
prefer qdev_prop_set_bit() over object_property_set_bool().

Mechanical transformation using the following coccinelle patch:

  @@
  expression o, p, v;
  @@
  -            object_property_set_bool(OBJECT(o), p, v, &error_abort)
  +            qdev_prop_set_bit(DEVICE(o), p, v)
  @@@@
  -            object_property_set_bool(o, p, v, &error_abort)
  +            qdev_prop_set_bit(DEVICE(o), p, v)

manually adding the missing "hw/qdev-properties.h" header.

In hw/arm/armsse.c we use the available 'cpudev' instead of 'cpuobj'.

Suggested-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 hw/acpi/cpu_hotplug.c               |  7 +++----
 hw/acpi/ich9.c                      |  4 ++--
 hw/acpi/piix4.c                     |  4 ++--
 hw/arm/armsse.c                     |  3 +--
 hw/arm/armv7m.c                     |  3 +--
 hw/arm/aspeed_ast2400.c             |  3 +--
 hw/arm/aspeed_ast2600.c             |  9 +++------
 hw/arm/bcm2835_peripherals.c        |  3 +--
 hw/arm/bcm2836.c                    |  4 ++--
 hw/arm/boot.c                       |  4 ++--
 hw/arm/fsl-imx25.c                  |  3 +--
 hw/arm/fsl-imx31.c                  |  3 +--
 hw/arm/fsl-imx6.c                   | 12 ++++--------
 hw/arm/fsl-imx6ul.c                 |  8 ++++----
 hw/arm/fsl-imx7.c                   | 10 ++++------
 hw/arm/npcm7xx.c                    |  9 +++------
 hw/arm/xlnx-versal.c                |  9 +++------
 hw/arm/xlnx-zynqmp.c                |  9 +++------
 hw/core/bus.c                       |  2 +-
 hw/core/qdev.c                      |  2 +-
 hw/i386/pc_piix.c                   | 19 ++++++-------------
 hw/microblaze/petalogix_ml605_mmu.c |  5 ++---
 hw/microblaze/xlnx-zynqmp-pmu.c     | 18 +++++++-----------
 hw/mips/cps.c                       |  3 +--
 hw/ppc/e500.c                       |  3 +--
 hw/ppc/spapr_pci.c                  |  3 +--
 hw/rx/rx-gdbsim.c                   |  4 ++--
 hw/sparc/sun4m.c                    |  3 +--
 28 files changed, 64 insertions(+), 105 deletions(-)

diff --git a/hw/acpi/cpu_hotplug.c b/hw/acpi/cpu_hotplug.c
index 634bbecb31..1338c037b5 100644
--- a/hw/acpi/cpu_hotplug.c
+++ b/hw/acpi/cpu_hotplug.c
@@ -12,6 +12,7 @@
 #include "qemu/osdep.h"
 #include "hw/acpi/cpu_hotplug.h"
 #include "qapi/error.h"
+#include "hw/qdev-properties.h"
 #include "hw/core/cpu.h"
 #include "hw/i386/pc.h"
 #include "hw/pci/pci.h"
@@ -41,8 +42,7 @@ static void cpu_status_write(void *opaque, hwaddr addr, uint64_t data,
      */
     if (addr == 0 && data == 0) {
         AcpiCpuHotplug *cpus = opaque;
-        object_property_set_bool(cpus->device, "cpu-hotplug-legacy", false,
-                                 &error_abort);
+        qdev_prop_set_bit(DEVICE(cpus->device), "cpu-hotplug-legacy", false);
     }
 }
 
@@ -66,8 +66,7 @@ static void acpi_set_cpu_present_bit(AcpiCpuHotplug *g, CPUState *cpu)
 
     cpu_id = k->get_arch_id(cpu);
     if ((cpu_id / 8) >= ACPI_GPE_PROC_LEN) {
-        object_property_set_bool(g->device, "cpu-hotplug-legacy", false,
-                                 &error_abort);
+        qdev_prop_set_bit(DEVICE(g->device), "cpu-hotplug-legacy", false);
         return;
     }
 
diff --git a/hw/acpi/ich9.c b/hw/acpi/ich9.c
index 25e2c7243e..64b00673fe 100644
--- a/hw/acpi/ich9.c
+++ b/hw/acpi/ich9.c
@@ -30,6 +30,7 @@
 #include "hw/pci/pci.h"
 #include "migration/vmstate.h"
 #include "qemu/timer.h"
+#include "hw/qdev-properties.h"
 #include "hw/core/cpu.h"
 #include "sysemu/reset.h"
 #include "sysemu/runstate.h"
@@ -197,8 +198,7 @@ static bool vmstate_test_use_cpuhp(void *opaque)
 static int vmstate_cpuhp_pre_load(void *opaque)
 {
     ICH9LPCPMRegs *s = opaque;
-    Object *obj = OBJECT(s->gpe_cpu.device);
-    object_property_set_bool(obj, "cpu-hotplug-legacy", false, &error_abort);
+    qdev_prop_set_bit(DEVICE(s->gpe_cpu.device), "cpu-hotplug-legacy", false);
     return 0;
 }
 
diff --git a/hw/acpi/piix4.c b/hw/acpi/piix4.c
index dd523d2e4c..215929ac6a 100644
--- a/hw/acpi/piix4.c
+++ b/hw/acpi/piix4.c
@@ -203,8 +203,8 @@ static bool vmstate_test_use_cpuhp(void *opaque)
 
 static int vmstate_cpuhp_pre_load(void *opaque)
 {
-    Object *obj = OBJECT(opaque);
-    object_property_set_bool(obj, "cpu-hotplug-legacy", false, &error_abort);
+    DeviceState *dev = DEVICE(opaque);
+    qdev_prop_set_bit(dev, "cpu-hotplug-legacy", false);
     return 0;
 }
 
diff --git a/hw/arm/armsse.c b/hw/arm/armsse.c
index 4672df180f..546b15e658 100644
--- a/hw/arm/armsse.c
+++ b/hw/arm/armsse.c
@@ -1022,8 +1022,7 @@ static void armsse_realize(DeviceState *dev, Error **errp)
          * later if necessary.
          */
         if (extract32(info->cpuwait_rst, i, 1)) {
-            object_property_set_bool(cpuobj, "start-powered-off", true,
-                                     &error_abort);
+            qdev_prop_set_bit(cpudev, "start-powered-off", true);
         }
         if (!s->cpu_fpu[i]) {
             if (!object_property_set_bool(cpuobj, "vfp", false, errp)) {
diff --git a/hw/arm/armv7m.c b/hw/arm/armv7m.c
index cbaebe9bf8..3a6d72b0f3 100644
--- a/hw/arm/armv7m.c
+++ b/hw/arm/armv7m.c
@@ -328,8 +328,7 @@ static void armv7m_realize(DeviceState *dev, Error **errp)
             return;
         }
     }
-    object_property_set_bool(OBJECT(s->cpu), "start-powered-off",
-                             s->start_powered_off, &error_abort);
+    qdev_prop_set_bit(DEVICE(s->cpu), "start-powered-off", s->start_powered_off);
 
     /*
      * Real M-profile hardware can be configured with a different number of
diff --git a/hw/arm/aspeed_ast2400.c b/hw/arm/aspeed_ast2400.c
index a4334c81b8..4a247bfcbb 100644
--- a/hw/arm/aspeed_ast2400.c
+++ b/hw/arm/aspeed_ast2400.c
@@ -420,8 +420,7 @@ static void aspeed_ast2400_soc_realize(DeviceState *dev, Error **errp)
 
     /* Net */
     for (i = 0; i < sc->macs_num; i++) {
-        object_property_set_bool(OBJECT(&s->ftgmac100[i]), "aspeed", true,
-                                 &error_abort);
+        qdev_prop_set_bit(DEVICE(&s->ftgmac100[i]), "aspeed", true);
         if (!sysbus_realize(SYS_BUS_DEVICE(&s->ftgmac100[i]), errp)) {
             return;
         }
diff --git a/hw/arm/aspeed_ast2600.c b/hw/arm/aspeed_ast2600.c
index b965fbab5e..5ec8ad73cd 100644
--- a/hw/arm/aspeed_ast2600.c
+++ b/hw/arm/aspeed_ast2600.c
@@ -317,10 +317,8 @@ static void aspeed_soc_ast2600_realize(DeviceState *dev, Error **errp)
 
         object_property_set_int(OBJECT(&a->cpu[i]), "cntfrq", 1125000000,
                                 &error_abort);
-        object_property_set_bool(OBJECT(&a->cpu[i]), "neon", false,
-                                &error_abort);
-        object_property_set_bool(OBJECT(&a->cpu[i]), "vfp-d32", false,
-                                &error_abort);
+        qdev_prop_set_bit(DEVICE(&a->cpu[i]), "neon", false);
+        qdev_prop_set_bit(DEVICE(&a->cpu[i]), "vfp-d32", false);
         object_property_set_link(OBJECT(&a->cpu[i]), "memory",
                                  OBJECT(s->memory), &error_abort);
 
@@ -500,8 +498,7 @@ static void aspeed_soc_ast2600_realize(DeviceState *dev, Error **errp)
 
     /* Net */
     for (i = 0; i < sc->macs_num; i++) {
-        object_property_set_bool(OBJECT(&s->ftgmac100[i]), "aspeed", true,
-                                 &error_abort);
+        qdev_prop_set_bit(DEVICE(&s->ftgmac100[i]), "aspeed", true);
         if (!sysbus_realize(SYS_BUS_DEVICE(&s->ftgmac100[i]), errp)) {
             return;
         }
diff --git a/hw/arm/bcm2835_peripherals.c b/hw/arm/bcm2835_peripherals.c
index 0233038b95..c07ca8817b 100644
--- a/hw/arm/bcm2835_peripherals.c
+++ b/hw/arm/bcm2835_peripherals.c
@@ -303,8 +303,7 @@ static void bcm2835_peripherals_realize(DeviceState *dev, Error **errp)
                              &error_abort);
     object_property_set_uint(OBJECT(&s->sdhci), "capareg",
                              BCM2835_SDHC_CAPAREG, &error_abort);
-    object_property_set_bool(OBJECT(&s->sdhci), "pending-insert-quirk", true,
-                             &error_abort);
+    qdev_prop_set_bit(DEVICE(&s->sdhci), "pending-insert-quirk", true);
     if (!sysbus_realize(SYS_BUS_DEVICE(&s->sdhci), errp)) {
         return;
     }
diff --git a/hw/arm/bcm2836.c b/hw/arm/bcm2836.c
index b0674a22a6..1fdc3be6bb 100644
--- a/hw/arm/bcm2836.c
+++ b/hw/arm/bcm2836.c
@@ -135,8 +135,8 @@ static void bcm2836_realize(DeviceState *dev, Error **errp)
                                 bc->peri_base, &error_abort);
 
         /* start powered off if not enabled */
-        object_property_set_bool(OBJECT(&s->cpu[n].core), "start-powered-off",
-                                 n >= s->enabled_cpus, &error_abort);
+        qdev_prop_set_bit(DEVICE(&s->cpu[n].core), "start-powered-off",
+                          n >= s->enabled_cpus);
 
         if (!qdev_realize(DEVICE(&s->cpu[n].core), NULL, errp)) {
             return;
diff --git a/hw/arm/boot.c b/hw/arm/boot.c
index 84ea6a807a..ebed887e5e 100644
--- a/hw/arm/boot.c
+++ b/hw/arm/boot.c
@@ -12,6 +12,7 @@
 #include "qemu/error-report.h"
 #include "qapi/error.h"
 #include <libfdt.h>
+#include "hw/qdev-properties.h"
 #include "hw/arm/boot.h"
 #include "hw/arm/linux-boot-if.h"
 #include "sysemu/kvm.h"
@@ -1287,8 +1288,7 @@ void arm_load_kernel(ARMCPU *cpu, MachineState *ms, struct arm_boot_info *info)
              * CPU.
              */
             if (cs != first_cpu) {
-                object_property_set_bool(cpuobj, "start-powered-off", true,
-                                         &error_abort);
+                qdev_prop_set_bit(DEVICE(cpuobj), "start-powered-off", true);
             }
         }
     }
diff --git a/hw/arm/fsl-imx25.c b/hw/arm/fsl-imx25.c
index 9aabbf7f58..fc6a7c8a8b 100644
--- a/hw/arm/fsl-imx25.c
+++ b/hw/arm/fsl-imx25.c
@@ -272,8 +272,7 @@ static void fsl_imx25_realize(DeviceState *dev, Error **errp)
     }
 
     /* Watchdog */
-    object_property_set_bool(OBJECT(&s->wdt), "pretimeout-support", true,
-                             &error_abort);
+    qdev_prop_set_bit(DEVICE(&s->wdt), "pretimeout-support", true);
     sysbus_realize(SYS_BUS_DEVICE(&s->wdt), &error_abort);
     sysbus_mmio_map(SYS_BUS_DEVICE(&s->wdt), 0, FSL_IMX25_WDT_ADDR);
     sysbus_connect_irq(SYS_BUS_DEVICE(&s->wdt), 0,
diff --git a/hw/arm/fsl-imx31.c b/hw/arm/fsl-imx31.c
index def27bb913..71f50ca802 100644
--- a/hw/arm/fsl-imx31.c
+++ b/hw/arm/fsl-imx31.c
@@ -171,8 +171,7 @@ static void fsl_imx31_realize(DeviceState *dev, Error **errp)
             { FSL_IMX31_GPIO3_ADDR, FSL_IMX31_GPIO3_IRQ }
         };
 
-        object_property_set_bool(OBJECT(&s->gpio[i]), "has-edge-sel", false,
-                                 &error_abort);
+        qdev_prop_set_bit(DEVICE(&s->gpio[i]), "has-edge-sel", false);
         if (!sysbus_realize(SYS_BUS_DEVICE(&s->gpio[i]), errp)) {
             return;
         }
diff --git a/hw/arm/fsl-imx6.c b/hw/arm/fsl-imx6.c
index 7dc42cbfe6..17c399a37e 100644
--- a/hw/arm/fsl-imx6.c
+++ b/hw/arm/fsl-imx6.c
@@ -128,8 +128,7 @@ static void fsl_imx6_realize(DeviceState *dev, Error **errp)
 
         /* All CPU but CPU 0 start in power off mode */
         if (i) {
-            object_property_set_bool(OBJECT(&s->cpu[i]), "start-powered-off",
-                                     true, &error_abort);
+            qdev_prop_set_bit(DEVICE(&s->cpu[i]), "start-powered-off", true);
         }
 
         if (!qdev_realize(DEVICE(&s->cpu[i]), NULL, errp)) {
@@ -288,10 +287,8 @@ static void fsl_imx6_realize(DeviceState *dev, Error **errp)
             },
         };
 
-        object_property_set_bool(OBJECT(&s->gpio[i]), "has-edge-sel", true,
-                                 &error_abort);
-        object_property_set_bool(OBJECT(&s->gpio[i]), "has-upper-pin-irq",
-                                 true, &error_abort);
+        qdev_prop_set_bit(DEVICE(&s->gpio[i]), "has-edge-sel", true);
+        qdev_prop_set_bit(DEVICE(&s->gpio[i]), "has-upper-pin-irq", true);
         if (!sysbus_realize(SYS_BUS_DEVICE(&s->gpio[i]), errp)) {
             return;
         }
@@ -412,8 +409,7 @@ static void fsl_imx6_realize(DeviceState *dev, Error **errp)
             FSL_IMX6_WDOG2_IRQ,
         };
 
-        object_property_set_bool(OBJECT(&s->wdt[i]), "pretimeout-support",
-                                 true, &error_abort);
+        qdev_prop_set_bit(DEVICE(&s->wdt[i]), "pretimeout-support", true);
         sysbus_realize(SYS_BUS_DEVICE(&s->wdt[i]), &error_abort);
 
         sysbus_mmio_map(SYS_BUS_DEVICE(&s->wdt[i]), 0, FSL_IMX6_WDOGn_ADDR[i]);
diff --git a/hw/arm/fsl-imx6ul.c b/hw/arm/fsl-imx6ul.c
index e37b69a5e1..4f4f2a6f41 100644
--- a/hw/arm/fsl-imx6ul.c
+++ b/hw/arm/fsl-imx6ul.c
@@ -410,8 +410,8 @@ static void fsl_imx6ul_realize(DeviceState *dev, Error **errp)
      * and we have to set all properties before calling sysbus_realize().
      */
     for (i = 0; i < FSL_IMX6UL_NUM_ETHS; i++) {
-        object_property_set_bool(OBJECT(&s->eth[i]), "phy-connected",
-                                 s->phy_connected[i], &error_abort);
+        qdev_prop_set_bit(DEVICE(&s->eth[i]), "phy-connected",
+                          s->phy_connected[i]);
         /*
          * If the MDIO bus on this controller is not connected, assume the
          * other controller provides support for it.
@@ -542,8 +542,8 @@ static void fsl_imx6ul_realize(DeviceState *dev, Error **errp)
             FSL_IMX6UL_WDOG3_IRQ,
         };
 
-        object_property_set_bool(OBJECT(&s->wdt[i]), "pretimeout-support",
-                                 true, &error_abort);
+        qdev_prop_set_bit(DEVICE(&s->wdt[i]), "pretimeout-support",
+                          true);
         sysbus_realize(SYS_BUS_DEVICE(&s->wdt[i]), &error_abort);
 
         sysbus_mmio_map(SYS_BUS_DEVICE(&s->wdt[i]), 0,
diff --git a/hw/arm/fsl-imx7.c b/hw/arm/fsl-imx7.c
index 474cfdc87c..3138ffeb08 100644
--- a/hw/arm/fsl-imx7.c
+++ b/hw/arm/fsl-imx7.c
@@ -192,8 +192,7 @@ static void fsl_imx7_realize(DeviceState *dev, Error **errp)
              * Secondary CPUs start in powered-down state (and can be
              * powered up via the SRC system reset controller)
              */
-            object_property_set_bool(o, "start-powered-off", true,
-                                     &error_abort);
+            qdev_prop_set_bit(DEVICE(o), "start-powered-off", true);
         }
 
         qdev_realize(DEVICE(o), NULL, &error_abort);
@@ -424,8 +423,8 @@ static void fsl_imx7_realize(DeviceState *dev, Error **errp)
      * and we have to set all properties before calling sysbus_realize().
      */
     for (i = 0; i < FSL_IMX7_NUM_ETHS; i++) {
-        object_property_set_bool(OBJECT(&s->eth[i]), "phy-connected",
-                                 s->phy_connected[i], &error_abort);
+        qdev_prop_set_bit(DEVICE(&s->eth[i]), "phy-connected",
+                          s->phy_connected[i]);
         /*
          * If the MDIO bus on this controller is not connected, assume the
          * other controller provides support for it.
@@ -513,8 +512,7 @@ static void fsl_imx7_realize(DeviceState *dev, Error **errp)
             FSL_IMX7_WDOG4_IRQ,
         };
 
-        object_property_set_bool(OBJECT(&s->wdt[i]), "pretimeout-support",
-                                 true, &error_abort);
+        qdev_prop_set_bit(DEVICE(&s->wdt[i]), "pretimeout-support", true);
         sysbus_realize(SYS_BUS_DEVICE(&s->wdt[i]), &error_abort);
 
         sysbus_mmio_map(SYS_BUS_DEVICE(&s->wdt[i]), 0, FSL_IMX7_WDOGn_ADDR[i]);
diff --git a/hw/arm/npcm7xx.c b/hw/arm/npcm7xx.c
index 15ff21d047..7022df3cfa 100644
--- a/hw/arm/npcm7xx.c
+++ b/hw/arm/npcm7xx.c
@@ -478,12 +478,10 @@ static void npcm7xx_realize(DeviceState *dev, Error **errp)
                                 &error_abort);
         object_property_set_int(OBJECT(&s->cpu[i]), "reset-cbar",
                                 NPCM7XX_GIC_CPU_IF_ADDR, &error_abort);
-        object_property_set_bool(OBJECT(&s->cpu[i]), "reset-hivecs", true,
-                                 &error_abort);
+        qdev_prop_set_bit(DEVICE(&s->cpu[i]), "reset-hivecs", true);
 
         /* Disable security extensions. */
-        object_property_set_bool(OBJECT(&s->cpu[i]), "has_el3", false,
-                                 &error_abort);
+        qdev_prop_set_bit(DEVICE(&s->cpu[i]), "has_el3", false);
 
         if (!qdev_realize(DEVICE(&s->cpu[i]), NULL, errp)) {
             return;
@@ -613,8 +611,7 @@ static void npcm7xx_realize(DeviceState *dev, Error **errp)
     }
 
     /* USB Host */
-    object_property_set_bool(OBJECT(&s->ehci), "companion-enable", true,
-                             &error_abort);
+    qdev_prop_set_bit(DEVICE(&s->ehci), "companion-enable", true);
     sysbus_realize(SYS_BUS_DEVICE(&s->ehci), &error_abort);
     sysbus_mmio_map(SYS_BUS_DEVICE(&s->ehci), 0, NPCM7XX_EHCI_BA);
     sysbus_connect_irq(SYS_BUS_DEVICE(&s->ehci), 0,
diff --git a/hw/arm/xlnx-versal.c b/hw/arm/xlnx-versal.c
index 9600551c44..e3b730f5f5 100644
--- a/hw/arm/xlnx-versal.c
+++ b/hw/arm/xlnx-versal.c
@@ -48,8 +48,7 @@ static void versal_create_apu_cpus(Versal *s)
         obj = OBJECT(&s->fpd.apu.cpu[i]);
         if (i) {
             /* Secondary CPUs start in powered-down state */
-            object_property_set_bool(obj, "start-powered-off", true,
-                                     &error_abort);
+            qdev_prop_set_bit(DEVICE(obj), "start-powered-off", true);
         }
 
         object_property_set_int(obj, "core-count", ARRAY_SIZE(s->fpd.apu.cpu),
@@ -150,8 +149,7 @@ static void versal_create_rpu_cpus(Versal *s)
                                 "rpu-cpu[*]", &s->lpd.rpu.cpu[i],
                                 XLNX_VERSAL_RCPU_TYPE);
         obj = OBJECT(&s->lpd.rpu.cpu[i]);
-        object_property_set_bool(obj, "start-powered-off", true,
-                                 &error_abort);
+        qdev_prop_set_bit(DEVICE(obj), "start-powered-off", true);
 
         object_property_set_int(obj, "mp-affinity", 0x100 | i, &error_abort);
         object_property_set_int(obj, "core-count", ARRAY_SIZE(s->lpd.rpu.cpu),
@@ -536,8 +534,7 @@ static void versal_create_ospi(Versal *s, qemu_irq *pic)
                             &s->pmc.iou.ospi.dma_src,
                             TYPE_XLNX_CSU_DMA);
 
-    object_property_set_bool(OBJECT(&s->pmc.iou.ospi.dma_src), "is-dst",
-                             false, &error_abort);
+    qdev_prop_set_bit(DEVICE(&s->pmc.iou.ospi.dma_src), "is-dst", false);
 
     object_property_set_link(OBJECT(&s->pmc.iou.ospi.dma_src),
                             "dma", OBJECT(mr_dac), &error_abort);
diff --git a/hw/arm/xlnx-zynqmp.c b/hw/arm/xlnx-zynqmp.c
index 5905a33015..f3ca3a7527 100644
--- a/hw/arm/xlnx-zynqmp.c
+++ b/hw/arm/xlnx-zynqmp.c
@@ -237,14 +237,12 @@ static void xlnx_zynqmp_create_rpu(MachineState *ms, XlnxZynqMPState *s,
             /*
              * Secondary CPUs start in powered-down state.
              */
-            object_property_set_bool(OBJECT(&s->rpu_cpu[i]),
-                                     "start-powered-off", true, &error_abort);
+            qdev_prop_set_bit(DEVICE(&s->rpu_cpu[i]), "start-powered-off", true);
         } else {
             s->boot_cpu_ptr = &s->rpu_cpu[i];
         }
 
-        object_property_set_bool(OBJECT(&s->rpu_cpu[i]), "reset-hivecs", true,
-                                 &error_abort);
+        qdev_prop_set_bit(DEVICE(&s->rpu_cpu[i]), "reset-hivecs", true);
         if (!qdev_realize(DEVICE(&s->rpu_cpu[i]), NULL, errp)) {
             return;
         }
@@ -518,8 +516,7 @@ static void xlnx_zynqmp_realize(DeviceState *dev, Error **errp)
             /*
              * Secondary CPUs start in powered-down state.
              */
-            object_property_set_bool(OBJECT(&s->apu_cpu[i]),
-                                     "start-powered-off", true, &error_abort);
+            qdev_prop_set_bit(DEVICE(&s->apu_cpu[i]), "start-powered-off", true);
         } else {
             s->boot_cpu_ptr = &s->apu_cpu[i];
         }
diff --git a/hw/core/bus.c b/hw/core/bus.c
index c7831b5293..a24ebe5886 100644
--- a/hw/core/bus.c
+++ b/hw/core/bus.c
@@ -176,7 +176,7 @@ bool qbus_realize(BusState *bus, Error **errp)
 
 void qbus_unrealize(BusState *bus)
 {
-    object_property_set_bool(OBJECT(bus), "realized", false, &error_abort);
+    qdev_prop_set_bit(DEVICE(bus), "realized", false);
 }
 
 static bool bus_get_realized(Object *obj, Error **errp)
diff --git a/hw/core/qdev.c b/hw/core/qdev.c
index 43d863b0c5..f4aa99ed77 100644
--- a/hw/core/qdev.c
+++ b/hw/core/qdev.c
@@ -303,7 +303,7 @@ bool qdev_realize_and_unref(DeviceState *dev, BusState *bus, Error **errp)
 
 void qdev_unrealize(DeviceState *dev)
 {
-    object_property_set_bool(OBJECT(dev), "realized", false, &error_abort);
+    qdev_prop_set_bit(dev, "realized", false);
 }
 
 static int qdev_assert_realized_properly_cb(Object *obj, void *opaque)
diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c
index eace854335..6733652120 100644
--- a/hw/i386/pc_piix.c
+++ b/hw/i386/pc_piix.c
@@ -263,20 +263,13 @@ static void pc_init1(MachineState *machine,
         size_t i;
 
         pci_dev = pci_new_multifunction(-1, pcms->south_bridge);
-        object_property_set_bool(OBJECT(pci_dev), "has-usb",
-                                 machine_usb(machine), &error_abort);
-        object_property_set_bool(OBJECT(pci_dev), "has-acpi",
-                                 x86_machine_is_acpi_enabled(x86ms),
-                                 &error_abort);
-        object_property_set_bool(OBJECT(pci_dev), "has-pic", false,
-                                 &error_abort);
-        object_property_set_bool(OBJECT(pci_dev), "has-pit", false,
-                                 &error_abort);
-        qdev_prop_set_uint32(DEVICE(pci_dev), "smb_io_base", 0xb100);
-        object_property_set_bool(OBJECT(pci_dev), "smm-enabled",
-                                 x86_machine_is_smm_enabled(x86ms),
-                                 &error_abort);
         dev = DEVICE(pci_dev);
+        qdev_prop_set_bit(dev, "has-usb", machine_usb(machine));
+        qdev_prop_set_bit(dev, "has-acpi", x86_machine_is_acpi_enabled(x86ms));
+        qdev_prop_set_bit(dev, "has-pic", false);
+        qdev_prop_set_bit(dev, "has-pit", false);
+        qdev_prop_set_uint32(DEVICE(pci_dev), "smb_io_base", 0xb100);
+        qdev_prop_set_bit(dev, "smm-enabled", x86_machine_is_smm_enabled(x86ms));
         for (i = 0; i < ISA_NUM_IRQS; i++) {
             qdev_connect_gpio_out_named(dev, "isa-irqs", i, x86ms->gsi[i]);
         }
diff --git a/hw/microblaze/petalogix_ml605_mmu.c b/hw/microblaze/petalogix_ml605_mmu.c
index fb7889cf67..626f9b0b56 100644
--- a/hw/microblaze/petalogix_ml605_mmu.c
+++ b/hw/microblaze/petalogix_ml605_mmu.c
@@ -88,9 +88,8 @@ petalogix_ml605_init(MachineState *machine)
      * root instructions
      */
     object_property_set_int(OBJECT(cpu), "use-fpu", 1, &error_abort);
-    object_property_set_bool(OBJECT(cpu), "dcache-writeback", true,
-                             &error_abort);
-    object_property_set_bool(OBJECT(cpu), "endianness", true, &error_abort);
+    qdev_prop_set_bit(DEVICE(cpu), "dcache-writeback", true);
+    qdev_prop_set_bit(DEVICE(cpu), "endianness", true);
     qdev_realize(DEVICE(cpu), NULL, &error_abort);
 
     /* Attach emulated BRAM through the LMB.  */
diff --git a/hw/microblaze/xlnx-zynqmp-pmu.c b/hw/microblaze/xlnx-zynqmp-pmu.c
index 5a2016672a..19cc5efee3 100644
--- a/hw/microblaze/xlnx-zynqmp-pmu.c
+++ b/hw/microblaze/xlnx-zynqmp-pmu.c
@@ -18,6 +18,7 @@
 #include "qemu/osdep.h"
 #include "qapi/error.h"
 #include "exec/address-spaces.h"
+#include "hw/qdev-properties.h"
 #include "hw/boards.h"
 #include "cpu.h"
 #include "boot.h"
@@ -79,19 +80,14 @@ static void xlnx_zynqmp_pmu_soc_realize(DeviceState *dev, Error **errp)
 
     object_property_set_uint(OBJECT(&s->cpu), "base-vectors",
                              XLNX_ZYNQMP_PMU_ROM_ADDR, &error_abort);
-    object_property_set_bool(OBJECT(&s->cpu), "use-stack-protection", true,
-                             &error_abort);
+    qdev_prop_set_bit(DEVICE(&s->cpu), "use-stack-protection", true);
     object_property_set_uint(OBJECT(&s->cpu), "use-fpu", 0, &error_abort);
     object_property_set_uint(OBJECT(&s->cpu), "use-hw-mul", 0, &error_abort);
-    object_property_set_bool(OBJECT(&s->cpu), "use-barrel", true,
-                             &error_abort);
-    object_property_set_bool(OBJECT(&s->cpu), "use-msr-instr", true,
-                             &error_abort);
-    object_property_set_bool(OBJECT(&s->cpu), "use-pcmp-instr", true,
-                             &error_abort);
-    object_property_set_bool(OBJECT(&s->cpu), "use-mmu", false, &error_abort);
-    object_property_set_bool(OBJECT(&s->cpu), "endianness", true,
-                             &error_abort);
+    qdev_prop_set_bit(DEVICE(&s->cpu), "use-barrel", true);
+    qdev_prop_set_bit(DEVICE(&s->cpu), "use-msr-instr", true);
+    qdev_prop_set_bit(DEVICE(&s->cpu), "use-pcmp-instr", true);
+    qdev_prop_set_bit(DEVICE(&s->cpu), "use-mmu", false);
+    qdev_prop_set_bit(DEVICE(&s->cpu), "endianness", true);
     object_property_set_str(OBJECT(&s->cpu), "version", "8.40.b",
                             &error_abort);
     object_property_set_uint(OBJECT(&s->cpu), "pvr", 0, &error_abort);
diff --git a/hw/mips/cps.c b/hw/mips/cps.c
index 4f12e23ab5..ee2a8d5563 100644
--- a/hw/mips/cps.c
+++ b/hw/mips/cps.c
@@ -78,8 +78,7 @@ static void mips_cps_realize(DeviceState *dev, Error **errp)
         CPUMIPSState *env = &cpu->env;
 
         /* All VPs are halted on reset. Leave powering up to CPC. */
-        object_property_set_bool(OBJECT(cpu), "start-powered-off", true,
-                                 &error_abort);
+        qdev_prop_set_bit(DEVICE(cpu), "start-powered-off", true);
 
         /* All cores use the same clock tree */
         qdev_connect_clock_in(DEVICE(cpu), "clk-in", s->clock);
diff --git a/hw/ppc/e500.c b/hw/ppc/e500.c
index 566f1200dd..a63d48c512 100644
--- a/hw/ppc/e500.c
+++ b/hw/ppc/e500.c
@@ -954,8 +954,7 @@ void ppce500_init(MachineState *machine)
          * Secondary CPU starts in halted state for now. Needs to change
          * when implementing non-kernel boot.
          */
-        object_property_set_bool(OBJECT(cs), "start-powered-off", i != 0,
-                                 &error_abort);
+        qdev_prop_set_bit(DEVICE(cs), "start-powered-off", i != 0);
         qdev_realize_and_unref(DEVICE(cs), NULL, &error_fatal);
 
         if (!firstenv) {
diff --git a/hw/ppc/spapr_pci.c b/hw/ppc/spapr_pci.c
index 6760823e13..266cf6c9e6 100644
--- a/hw/ppc/spapr_pci.c
+++ b/hw/ppc/spapr_pci.c
@@ -2490,8 +2490,7 @@ static int spapr_switch_one_vga(DeviceState *dev, void *opaque)
         || object_dynamic_cast(OBJECT(dev), "secondary-vga")
         || object_dynamic_cast(OBJECT(dev), "bochs-display")
         || object_dynamic_cast(OBJECT(dev), "virtio-vga")) {
-        object_property_set_bool(OBJECT(dev), "big-endian-framebuffer", be,
-                                 &error_abort);
+        qdev_prop_set_bit(dev, "big-endian-framebuffer", be);
     }
     return 0;
 }
diff --git a/hw/rx/rx-gdbsim.c b/hw/rx/rx-gdbsim.c
index 47c17026c7..53d3d560c8 100644
--- a/hw/rx/rx-gdbsim.c
+++ b/hw/rx/rx-gdbsim.c
@@ -21,6 +21,7 @@
 #include "qemu/error-report.h"
 #include "qemu/guest-random.h"
 #include "qapi/error.h"
+#include "hw/qdev-properties.h"
 #include "hw/loader.h"
 #include "hw/rx/rx62n.h"
 #include "sysemu/qtest.h"
@@ -103,8 +104,7 @@ static void rx_gdbsim_init(MachineState *machine)
                              &error_abort);
     object_property_set_uint(OBJECT(&s->mcu), "xtal-frequency-hz",
                              rxc->xtal_freq_hz, &error_abort);
-    object_property_set_bool(OBJECT(&s->mcu), "load-kernel",
-                             kernel_filename != NULL, &error_abort);
+    qdev_prop_set_bit(DEVICE(&s->mcu), "load-kernel", kernel_filename != NULL);
 
     if (!kernel_filename) {
         if (machine->firmware) {
diff --git a/hw/sparc/sun4m.c b/hw/sparc/sun4m.c
index 64895aebe3..d631d555d8 100644
--- a/hw/sparc/sun4m.c
+++ b/hw/sparc/sun4m.c
@@ -803,8 +803,7 @@ static void cpu_devinit(const char *cpu_type, unsigned int id,
     env = &cpu->env;
 
     qemu_register_reset(sun4m_cpu_reset, cpu);
-    object_property_set_bool(OBJECT(cpu), "start-powered-off", id != 0,
-                             &error_abort);
+    qdev_prop_set_bit(DEVICE(cpu), "start-powered-off", id != 0);
     qdev_realize_and_unref(DEVICE(cpu), NULL, &error_fatal);
     cpu_sparc_set_id(env, id);
     *cpu_irqs = qemu_allocate_irqs(cpu_set_irq, cpu, MAX_PILS);
-- 
2.41.0

Re: [PATCH-for-9.0 v2 5/8] hw: Prefer qdev_prop_set_bit over object_property_set_bool for QDev

[Ani Sinha]

> On 23-Nov-2023, at 8:08 PM, Philippe Mathieu-Daudé <philmd@linaro.org> wrote:
> 
> The QOM API is lower level than the QDev one. When an instance is
> QDev and setting the property can not fail (using &error_abort),
> prefer qdev_prop_set_bit() over object_property_set_bool().
> 
> Mechanical transformation using the following coccinelle patch:
> 
>  @@
>  expression o, p, v;
>  @@
>  -            object_property_set_bool(OBJECT(o), p, v, &error_abort)
>  +            qdev_prop_set_bit(DEVICE(o), p, v)
>  @@@@
>  -            object_property_set_bool(o, p, v, &error_abort)
>  +            qdev_prop_set_bit(DEVICE(o), p, v)
> 
> manually adding the missing "hw/qdev-properties.h" header.
> 
> In hw/arm/armsse.c we use the available 'cpudev' instead of 'cpuobj'.
> 
> Suggested-by: Markus Armbruster <armbru@redhat.com>
> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
> ---
> hw/acpi/cpu_hotplug.c               |  7 +++----
> hw/acpi/ich9.c                      |  4 ++--
> hw/acpi/piix4.c                     |  4 ++--

For the acpi bits,
Reviewed-by: Ani Sinha <anisinha@redhat.com>

> hw/arm/armsse.c                     |  3 +--
> hw/arm/armv7m.c                     |  3 +--
> hw/arm/aspeed_ast2400.c             |  3 +--
> hw/arm/aspeed_ast2600.c             |  9 +++------
> hw/arm/bcm2835_peripherals.c        |  3 +--
> hw/arm/bcm2836.c                    |  4 ++--
> hw/arm/boot.c                       |  4 ++--
> hw/arm/fsl-imx25.c                  |  3 +--
> hw/arm/fsl-imx31.c                  |  3 +--
> hw/arm/fsl-imx6.c                   | 12 ++++--------
> hw/arm/fsl-imx6ul.c                 |  8 ++++----
> hw/arm/fsl-imx7.c                   | 10 ++++------
> hw/arm/npcm7xx.c                    |  9 +++------
> hw/arm/xlnx-versal.c                |  9 +++------
> hw/arm/xlnx-zynqmp.c                |  9 +++------
> hw/core/bus.c                       |  2 +-
> hw/core/qdev.c                      |  2 +-
> hw/i386/pc_piix.c                   | 19 ++++++-------------
> hw/microblaze/petalogix_ml605_mmu.c |  5 ++---
> hw/microblaze/xlnx-zynqmp-pmu.c     | 18 +++++++-----------
> hw/mips/cps.c                       |  3 +--
> hw/ppc/e500.c                       |  3 +--
> hw/ppc/spapr_pci.c                  |  3 +--
> hw/rx/rx-gdbsim.c                   |  4 ++--
> hw/sparc/sun4m.c                    |  3 +--
> 28 files changed, 64 insertions(+), 105 deletions(-)
> 
> diff --git a/hw/acpi/cpu_hotplug.c b/hw/acpi/cpu_hotplug.c
> index 634bbecb31..1338c037b5 100644
> --- a/hw/acpi/cpu_hotplug.c
> +++ b/hw/acpi/cpu_hotplug.c
> @@ -12,6 +12,7 @@
> #include "qemu/osdep.h"
> #include "hw/acpi/cpu_hotplug.h"
> #include "qapi/error.h"
> +#include "hw/qdev-properties.h"
> #include "hw/core/cpu.h"
> #include "hw/i386/pc.h"
> #include "hw/pci/pci.h"
> @@ -41,8 +42,7 @@ static void cpu_status_write(void *opaque, hwaddr addr, uint64_t data,
>      */
>     if (addr == 0 && data == 0) {
>         AcpiCpuHotplug *cpus = opaque;
> -        object_property_set_bool(cpus->device, "cpu-hotplug-legacy", false,
> -                                 &error_abort);
> +        qdev_prop_set_bit(DEVICE(cpus->device), "cpu-hotplug-legacy", false);
>     }
> }
> 
> @@ -66,8 +66,7 @@ static void acpi_set_cpu_present_bit(AcpiCpuHotplug *g, CPUState *cpu)
> 
>     cpu_id = k->get_arch_id(cpu);
>     if ((cpu_id / 8) >= ACPI_GPE_PROC_LEN) {
> -        object_property_set_bool(g->device, "cpu-hotplug-legacy", false,
> -                                 &error_abort);
> +        qdev_prop_set_bit(DEVICE(g->device), "cpu-hotplug-legacy", false);
>         return;
>     }
> 
> diff --git a/hw/acpi/ich9.c b/hw/acpi/ich9.c
> index 25e2c7243e..64b00673fe 100644
> --- a/hw/acpi/ich9.c
> +++ b/hw/acpi/ich9.c
> @@ -30,6 +30,7 @@
> #include "hw/pci/pci.h"
> #include "migration/vmstate.h"
> #include "qemu/timer.h"
> +#include "hw/qdev-properties.h"
> #include "hw/core/cpu.h"
> #include "sysemu/reset.h"
> #include "sysemu/runstate.h"
> @@ -197,8 +198,7 @@ static bool vmstate_test_use_cpuhp(void *opaque)
> static int vmstate_cpuhp_pre_load(void *opaque)
> {
>     ICH9LPCPMRegs *s = opaque;
> -    Object *obj = OBJECT(s->gpe_cpu.device);
> -    object_property_set_bool(obj, "cpu-hotplug-legacy", false, &error_abort);
> +    qdev_prop_set_bit(DEVICE(s->gpe_cpu.device), "cpu-hotplug-legacy", false);
>     return 0;
> }
> 
> diff --git a/hw/acpi/piix4.c b/hw/acpi/piix4.c
> index dd523d2e4c..215929ac6a 100644
> --- a/hw/acpi/piix4.c
> +++ b/hw/acpi/piix4.c
> @@ -203,8 +203,8 @@ static bool vmstate_test_use_cpuhp(void *opaque)
> 
> static int vmstate_cpuhp_pre_load(void *opaque)
> {
> -    Object *obj = OBJECT(opaque);
> -    object_property_set_bool(obj, "cpu-hotplug-legacy", false, &error_abort);
> +    DeviceState *dev = DEVICE(opaque);
> +    qdev_prop_set_bit(dev, "cpu-hotplug-legacy", false);
>     return 0;
> }
> 
> diff --git a/hw/arm/armsse.c b/hw/arm/armsse.c
> index 4672df180f..546b15e658 100644
> --- a/hw/arm/armsse.c
> +++ b/hw/arm/armsse.c
> @@ -1022,8 +1022,7 @@ static void armsse_realize(DeviceState *dev, Error **errp)
>          * later if necessary.
>          */
>         if (extract32(info->cpuwait_rst, i, 1)) {
> -            object_property_set_bool(cpuobj, "start-powered-off", true,
> -                                     &error_abort);
> +            qdev_prop_set_bit(cpudev, "start-powered-off", true);
>         }
>         if (!s->cpu_fpu[i]) {
>             if (!object_property_set_bool(cpuobj, "vfp", false, errp)) {
> diff --git a/hw/arm/armv7m.c b/hw/arm/armv7m.c
> index cbaebe9bf8..3a6d72b0f3 100644
> --- a/hw/arm/armv7m.c
> +++ b/hw/arm/armv7m.c
> @@ -328,8 +328,7 @@ static void armv7m_realize(DeviceState *dev, Error **errp)
>             return;
>         }
>     }
> -    object_property_set_bool(OBJECT(s->cpu), "start-powered-off",
> -                             s->start_powered_off, &error_abort);
> +    qdev_prop_set_bit(DEVICE(s->cpu), "start-powered-off", s->start_powered_off);
> 
>     /*
>      * Real M-profile hardware can be configured with a different number of
> diff --git a/hw/arm/aspeed_ast2400.c b/hw/arm/aspeed_ast2400.c
> index a4334c81b8..4a247bfcbb 100644
> --- a/hw/arm/aspeed_ast2400.c
> +++ b/hw/arm/aspeed_ast2400.c
> @@ -420,8 +420,7 @@ static void aspeed_ast2400_soc_realize(DeviceState *dev, Error **errp)
> 
>     /* Net */
>     for (i = 0; i < sc->macs_num; i++) {
> -        object_property_set_bool(OBJECT(&s->ftgmac100[i]), "aspeed", true,
> -                                 &error_abort);
> +        qdev_prop_set_bit(DEVICE(&s->ftgmac100[i]), "aspeed", true);
>         if (!sysbus_realize(SYS_BUS_DEVICE(&s->ftgmac100[i]), errp)) {
>             return;
>         }
> diff --git a/hw/arm/aspeed_ast2600.c b/hw/arm/aspeed_ast2600.c
> index b965fbab5e..5ec8ad73cd 100644
> --- a/hw/arm/aspeed_ast2600.c
> +++ b/hw/arm/aspeed_ast2600.c
> @@ -317,10 +317,8 @@ static void aspeed_soc_ast2600_realize(DeviceState *dev, Error **errp)
> 
>         object_property_set_int(OBJECT(&a->cpu[i]), "cntfrq", 1125000000,
>                                 &error_abort);
> -        object_property_set_bool(OBJECT(&a->cpu[i]), "neon", false,
> -                                &error_abort);
> -        object_property_set_bool(OBJECT(&a->cpu[i]), "vfp-d32", false,
> -                                &error_abort);
> +        qdev_prop_set_bit(DEVICE(&a->cpu[i]), "neon", false);
> +        qdev_prop_set_bit(DEVICE(&a->cpu[i]), "vfp-d32", false);
>         object_property_set_link(OBJECT(&a->cpu[i]), "memory",
>                                  OBJECT(s->memory), &error_abort);
> 
> @@ -500,8 +498,7 @@ static void aspeed_soc_ast2600_realize(DeviceState *dev, Error **errp)
> 
>     /* Net */
>     for (i = 0; i < sc->macs_num; i++) {
> -        object_property_set_bool(OBJECT(&s->ftgmac100[i]), "aspeed", true,
> -                                 &error_abort);
> +        qdev_prop_set_bit(DEVICE(&s->ftgmac100[i]), "aspeed", true);
>         if (!sysbus_realize(SYS_BUS_DEVICE(&s->ftgmac100[i]), errp)) {
>             return;
>         }
> diff --git a/hw/arm/bcm2835_peripherals.c b/hw/arm/bcm2835_peripherals.c
> index 0233038b95..c07ca8817b 100644
> --- a/hw/arm/bcm2835_peripherals.c
> +++ b/hw/arm/bcm2835_peripherals.c
> @@ -303,8 +303,7 @@ static void bcm2835_peripherals_realize(DeviceState *dev, Error **errp)
>                              &error_abort);
>     object_property_set_uint(OBJECT(&s->sdhci), "capareg",
>                              BCM2835_SDHC_CAPAREG, &error_abort);
> -    object_property_set_bool(OBJECT(&s->sdhci), "pending-insert-quirk", true,
> -                             &error_abort);
> +    qdev_prop_set_bit(DEVICE(&s->sdhci), "pending-insert-quirk", true);
>     if (!sysbus_realize(SYS_BUS_DEVICE(&s->sdhci), errp)) {
>         return;
>     }
> diff --git a/hw/arm/bcm2836.c b/hw/arm/bcm2836.c
> index b0674a22a6..1fdc3be6bb 100644
> --- a/hw/arm/bcm2836.c
> +++ b/hw/arm/bcm2836.c
> @@ -135,8 +135,8 @@ static void bcm2836_realize(DeviceState *dev, Error **errp)
>                                 bc->peri_base, &error_abort);
> 
>         /* start powered off if not enabled */
> -        object_property_set_bool(OBJECT(&s->cpu[n].core), "start-powered-off",
> -                                 n >= s->enabled_cpus, &error_abort);
> +        qdev_prop_set_bit(DEVICE(&s->cpu[n].core), "start-powered-off",
> +                          n >= s->enabled_cpus);
> 
>         if (!qdev_realize(DEVICE(&s->cpu[n].core), NULL, errp)) {
>             return;
> diff --git a/hw/arm/boot.c b/hw/arm/boot.c
> index 84ea6a807a..ebed887e5e 100644
> --- a/hw/arm/boot.c
> +++ b/hw/arm/boot.c
> @@ -12,6 +12,7 @@
> #include "qemu/error-report.h"
> #include "qapi/error.h"
> #include <libfdt.h>
> +#include "hw/qdev-properties.h"
> #include "hw/arm/boot.h"
> #include "hw/arm/linux-boot-if.h"
> #include "sysemu/kvm.h"
> @@ -1287,8 +1288,7 @@ void arm_load_kernel(ARMCPU *cpu, MachineState *ms, struct arm_boot_info *info)
>              * CPU.
>              */
>             if (cs != first_cpu) {
> -                object_property_set_bool(cpuobj, "start-powered-off", true,
> -                                         &error_abort);
> +                qdev_prop_set_bit(DEVICE(cpuobj), "start-powered-off", true);
>             }
>         }
>     }
> diff --git a/hw/arm/fsl-imx25.c b/hw/arm/fsl-imx25.c
> index 9aabbf7f58..fc6a7c8a8b 100644
> --- a/hw/arm/fsl-imx25.c
> +++ b/hw/arm/fsl-imx25.c
> @@ -272,8 +272,7 @@ static void fsl_imx25_realize(DeviceState *dev, Error **errp)
>     }
> 
>     /* Watchdog */
> -    object_property_set_bool(OBJECT(&s->wdt), "pretimeout-support", true,
> -                             &error_abort);
> +    qdev_prop_set_bit(DEVICE(&s->wdt), "pretimeout-support", true);
>     sysbus_realize(SYS_BUS_DEVICE(&s->wdt), &error_abort);
>     sysbus_mmio_map(SYS_BUS_DEVICE(&s->wdt), 0, FSL_IMX25_WDT_ADDR);
>     sysbus_connect_irq(SYS_BUS_DEVICE(&s->wdt), 0,
> diff --git a/hw/arm/fsl-imx31.c b/hw/arm/fsl-imx31.c
> index def27bb913..71f50ca802 100644
> --- a/hw/arm/fsl-imx31.c
> +++ b/hw/arm/fsl-imx31.c
> @@ -171,8 +171,7 @@ static void fsl_imx31_realize(DeviceState *dev, Error **errp)
>             { FSL_IMX31_GPIO3_ADDR, FSL_IMX31_GPIO3_IRQ }
>         };
> 
> -        object_property_set_bool(OBJECT(&s->gpio[i]), "has-edge-sel", false,
> -                                 &error_abort);
> +        qdev_prop_set_bit(DEVICE(&s->gpio[i]), "has-edge-sel", false);
>         if (!sysbus_realize(SYS_BUS_DEVICE(&s->gpio[i]), errp)) {
>             return;
>         }
> diff --git a/hw/arm/fsl-imx6.c b/hw/arm/fsl-imx6.c
> index 7dc42cbfe6..17c399a37e 100644
> --- a/hw/arm/fsl-imx6.c
> +++ b/hw/arm/fsl-imx6.c
> @@ -128,8 +128,7 @@ static void fsl_imx6_realize(DeviceState *dev, Error **errp)
> 
>         /* All CPU but CPU 0 start in power off mode */
>         if (i) {
> -            object_property_set_bool(OBJECT(&s->cpu[i]), "start-powered-off",
> -                                     true, &error_abort);
> +            qdev_prop_set_bit(DEVICE(&s->cpu[i]), "start-powered-off", true);
>         }
> 
>         if (!qdev_realize(DEVICE(&s->cpu[i]), NULL, errp)) {
> @@ -288,10 +287,8 @@ static void fsl_imx6_realize(DeviceState *dev, Error **errp)
>             },
>         };
> 
> -        object_property_set_bool(OBJECT(&s->gpio[i]), "has-edge-sel", true,
> -                                 &error_abort);
> -        object_property_set_bool(OBJECT(&s->gpio[i]), "has-upper-pin-irq",
> -                                 true, &error_abort);
> +        qdev_prop_set_bit(DEVICE(&s->gpio[i]), "has-edge-sel", true);
> +        qdev_prop_set_bit(DEVICE(&s->gpio[i]), "has-upper-pin-irq", true);
>         if (!sysbus_realize(SYS_BUS_DEVICE(&s->gpio[i]), errp)) {
>             return;
>         }
> @@ -412,8 +409,7 @@ static void fsl_imx6_realize(DeviceState *dev, Error **errp)
>             FSL_IMX6_WDOG2_IRQ,
>         };
> 
> -        object_property_set_bool(OBJECT(&s->wdt[i]), "pretimeout-support",
> -                                 true, &error_abort);
> +        qdev_prop_set_bit(DEVICE(&s->wdt[i]), "pretimeout-support", true);
>         sysbus_realize(SYS_BUS_DEVICE(&s->wdt[i]), &error_abort);
> 
>         sysbus_mmio_map(SYS_BUS_DEVICE(&s->wdt[i]), 0, FSL_IMX6_WDOGn_ADDR[i]);
> diff --git a/hw/arm/fsl-imx6ul.c b/hw/arm/fsl-imx6ul.c
> index e37b69a5e1..4f4f2a6f41 100644
> --- a/hw/arm/fsl-imx6ul.c
> +++ b/hw/arm/fsl-imx6ul.c
> @@ -410,8 +410,8 @@ static void fsl_imx6ul_realize(DeviceState *dev, Error **errp)
>      * and we have to set all properties before calling sysbus_realize().
>      */
>     for (i = 0; i < FSL_IMX6UL_NUM_ETHS; i++) {
> -        object_property_set_bool(OBJECT(&s->eth[i]), "phy-connected",
> -                                 s->phy_connected[i], &error_abort);
> +        qdev_prop_set_bit(DEVICE(&s->eth[i]), "phy-connected",
> +                          s->phy_connected[i]);
>         /*
>          * If the MDIO bus on this controller is not connected, assume the
>          * other controller provides support for it.
> @@ -542,8 +542,8 @@ static void fsl_imx6ul_realize(DeviceState *dev, Error **errp)
>             FSL_IMX6UL_WDOG3_IRQ,
>         };
> 
> -        object_property_set_bool(OBJECT(&s->wdt[i]), "pretimeout-support",
> -                                 true, &error_abort);
> +        qdev_prop_set_bit(DEVICE(&s->wdt[i]), "pretimeout-support",
> +                          true);
>         sysbus_realize(SYS_BUS_DEVICE(&s->wdt[i]), &error_abort);
> 
>         sysbus_mmio_map(SYS_BUS_DEVICE(&s->wdt[i]), 0,
> diff --git a/hw/arm/fsl-imx7.c b/hw/arm/fsl-imx7.c
> index 474cfdc87c..3138ffeb08 100644
> --- a/hw/arm/fsl-imx7.c
> +++ b/hw/arm/fsl-imx7.c
> @@ -192,8 +192,7 @@ static void fsl_imx7_realize(DeviceState *dev, Error **errp)
>              * Secondary CPUs start in powered-down state (and can be
>              * powered up via the SRC system reset controller)
>              */
> -            object_property_set_bool(o, "start-powered-off", true,
> -                                     &error_abort);
> +            qdev_prop_set_bit(DEVICE(o), "start-powered-off", true);
>         }
> 
>         qdev_realize(DEVICE(o), NULL, &error_abort);
> @@ -424,8 +423,8 @@ static void fsl_imx7_realize(DeviceState *dev, Error **errp)
>      * and we have to set all properties before calling sysbus_realize().
>      */
>     for (i = 0; i < FSL_IMX7_NUM_ETHS; i++) {
> -        object_property_set_bool(OBJECT(&s->eth[i]), "phy-connected",
> -                                 s->phy_connected[i], &error_abort);
> +        qdev_prop_set_bit(DEVICE(&s->eth[i]), "phy-connected",
> +                          s->phy_connected[i]);
>         /*
>          * If the MDIO bus on this controller is not connected, assume the
>          * other controller provides support for it.
> @@ -513,8 +512,7 @@ static void fsl_imx7_realize(DeviceState *dev, Error **errp)
>             FSL_IMX7_WDOG4_IRQ,
>         };
> 
> -        object_property_set_bool(OBJECT(&s->wdt[i]), "pretimeout-support",
> -                                 true, &error_abort);
> +        qdev_prop_set_bit(DEVICE(&s->wdt[i]), "pretimeout-support", true);
>         sysbus_realize(SYS_BUS_DEVICE(&s->wdt[i]), &error_abort);
> 
>         sysbus_mmio_map(SYS_BUS_DEVICE(&s->wdt[i]), 0, FSL_IMX7_WDOGn_ADDR[i]);
> diff --git a/hw/arm/npcm7xx.c b/hw/arm/npcm7xx.c
> index 15ff21d047..7022df3cfa 100644
> --- a/hw/arm/npcm7xx.c
> +++ b/hw/arm/npcm7xx.c
> @@ -478,12 +478,10 @@ static void npcm7xx_realize(DeviceState *dev, Error **errp)
>                                 &error_abort);
>         object_property_set_int(OBJECT(&s->cpu[i]), "reset-cbar",
>                                 NPCM7XX_GIC_CPU_IF_ADDR, &error_abort);
> -        object_property_set_bool(OBJECT(&s->cpu[i]), "reset-hivecs", true,
> -                                 &error_abort);
> +        qdev_prop_set_bit(DEVICE(&s->cpu[i]), "reset-hivecs", true);
> 
>         /* Disable security extensions. */
> -        object_property_set_bool(OBJECT(&s->cpu[i]), "has_el3", false,
> -                                 &error_abort);
> +        qdev_prop_set_bit(DEVICE(&s->cpu[i]), "has_el3", false);
> 
>         if (!qdev_realize(DEVICE(&s->cpu[i]), NULL, errp)) {
>             return;
> @@ -613,8 +611,7 @@ static void npcm7xx_realize(DeviceState *dev, Error **errp)
>     }
> 
>     /* USB Host */
> -    object_property_set_bool(OBJECT(&s->ehci), "companion-enable", true,
> -                             &error_abort);
> +    qdev_prop_set_bit(DEVICE(&s->ehci), "companion-enable", true);
>     sysbus_realize(SYS_BUS_DEVICE(&s->ehci), &error_abort);
>     sysbus_mmio_map(SYS_BUS_DEVICE(&s->ehci), 0, NPCM7XX_EHCI_BA);
>     sysbus_connect_irq(SYS_BUS_DEVICE(&s->ehci), 0,
> diff --git a/hw/arm/xlnx-versal.c b/hw/arm/xlnx-versal.c
> index 9600551c44..e3b730f5f5 100644
> --- a/hw/arm/xlnx-versal.c
> +++ b/hw/arm/xlnx-versal.c
> @@ -48,8 +48,7 @@ static void versal_create_apu_cpus(Versal *s)
>         obj = OBJECT(&s->fpd.apu.cpu[i]);
>         if (i) {
>             /* Secondary CPUs start in powered-down state */
> -            object_property_set_bool(obj, "start-powered-off", true,
> -                                     &error_abort);
> +            qdev_prop_set_bit(DEVICE(obj), "start-powered-off", true);
>         }
> 
>         object_property_set_int(obj, "core-count", ARRAY_SIZE(s->fpd.apu.cpu),
> @@ -150,8 +149,7 @@ static void versal_create_rpu_cpus(Versal *s)
>                                 "rpu-cpu[*]", &s->lpd.rpu.cpu[i],
>                                 XLNX_VERSAL_RCPU_TYPE);
>         obj = OBJECT(&s->lpd.rpu.cpu[i]);
> -        object_property_set_bool(obj, "start-powered-off", true,
> -                                 &error_abort);
> +        qdev_prop_set_bit(DEVICE(obj), "start-powered-off", true);
> 
>         object_property_set_int(obj, "mp-affinity", 0x100 | i, &error_abort);
>         object_property_set_int(obj, "core-count", ARRAY_SIZE(s->lpd.rpu.cpu),
> @@ -536,8 +534,7 @@ static void versal_create_ospi(Versal *s, qemu_irq *pic)
>                             &s->pmc.iou.ospi.dma_src,
>                             TYPE_XLNX_CSU_DMA);
> 
> -    object_property_set_bool(OBJECT(&s->pmc.iou.ospi.dma_src), "is-dst",
> -                             false, &error_abort);
> +    qdev_prop_set_bit(DEVICE(&s->pmc.iou.ospi.dma_src), "is-dst", false);
> 
>     object_property_set_link(OBJECT(&s->pmc.iou.ospi.dma_src),
>                             "dma", OBJECT(mr_dac), &error_abort);
> diff --git a/hw/arm/xlnx-zynqmp.c b/hw/arm/xlnx-zynqmp.c
> index 5905a33015..f3ca3a7527 100644
> --- a/hw/arm/xlnx-zynqmp.c
> +++ b/hw/arm/xlnx-zynqmp.c
> @@ -237,14 +237,12 @@ static void xlnx_zynqmp_create_rpu(MachineState *ms, XlnxZynqMPState *s,
>             /*
>              * Secondary CPUs start in powered-down state.
>              */
> -            object_property_set_bool(OBJECT(&s->rpu_cpu[i]),
> -                                     "start-powered-off", true, &error_abort);
> +            qdev_prop_set_bit(DEVICE(&s->rpu_cpu[i]), "start-powered-off", true);
>         } else {
>             s->boot_cpu_ptr = &s->rpu_cpu[i];
>         }
> 
> -        object_property_set_bool(OBJECT(&s->rpu_cpu[i]), "reset-hivecs", true,
> -                                 &error_abort);
> +        qdev_prop_set_bit(DEVICE(&s->rpu_cpu[i]), "reset-hivecs", true);
>         if (!qdev_realize(DEVICE(&s->rpu_cpu[i]), NULL, errp)) {
>             return;
>         }
> @@ -518,8 +516,7 @@ static void xlnx_zynqmp_realize(DeviceState *dev, Error **errp)
>             /*
>              * Secondary CPUs start in powered-down state.
>              */
> -            object_property_set_bool(OBJECT(&s->apu_cpu[i]),
> -                                     "start-powered-off", true, &error_abort);
> +            qdev_prop_set_bit(DEVICE(&s->apu_cpu[i]), "start-powered-off", true);
>         } else {
>             s->boot_cpu_ptr = &s->apu_cpu[i];
>         }
> diff --git a/hw/core/bus.c b/hw/core/bus.c
> index c7831b5293..a24ebe5886 100644
> --- a/hw/core/bus.c
> +++ b/hw/core/bus.c
> @@ -176,7 +176,7 @@ bool qbus_realize(BusState *bus, Error **errp)
> 
> void qbus_unrealize(BusState *bus)
> {
> -    object_property_set_bool(OBJECT(bus), "realized", false, &error_abort);
> +    qdev_prop_set_bit(DEVICE(bus), "realized", false);
> }
> 
> static bool bus_get_realized(Object *obj, Error **errp)
> diff --git a/hw/core/qdev.c b/hw/core/qdev.c
> index 43d863b0c5..f4aa99ed77 100644
> --- a/hw/core/qdev.c
> +++ b/hw/core/qdev.c
> @@ -303,7 +303,7 @@ bool qdev_realize_and_unref(DeviceState *dev, BusState *bus, Error **errp)
> 
> void qdev_unrealize(DeviceState *dev)
> {
> -    object_property_set_bool(OBJECT(dev), "realized", false, &error_abort);
> +    qdev_prop_set_bit(dev, "realized", false);
> }
> 
> static int qdev_assert_realized_properly_cb(Object *obj, void *opaque)
> diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c
> index eace854335..6733652120 100644
> --- a/hw/i386/pc_piix.c
> +++ b/hw/i386/pc_piix.c
> @@ -263,20 +263,13 @@ static void pc_init1(MachineState *machine,
>         size_t i;
> 
>         pci_dev = pci_new_multifunction(-1, pcms->south_bridge);
> -        object_property_set_bool(OBJECT(pci_dev), "has-usb",
> -                                 machine_usb(machine), &error_abort);
> -        object_property_set_bool(OBJECT(pci_dev), "has-acpi",
> -                                 x86_machine_is_acpi_enabled(x86ms),
> -                                 &error_abort);
> -        object_property_set_bool(OBJECT(pci_dev), "has-pic", false,
> -                                 &error_abort);
> -        object_property_set_bool(OBJECT(pci_dev), "has-pit", false,
> -                                 &error_abort);
> -        qdev_prop_set_uint32(DEVICE(pci_dev), "smb_io_base", 0xb100);
> -        object_property_set_bool(OBJECT(pci_dev), "smm-enabled",
> -                                 x86_machine_is_smm_enabled(x86ms),
> -                                 &error_abort);
>         dev = DEVICE(pci_dev);
> +        qdev_prop_set_bit(dev, "has-usb", machine_usb(machine));
> +        qdev_prop_set_bit(dev, "has-acpi", x86_machine_is_acpi_enabled(x86ms));
> +        qdev_prop_set_bit(dev, "has-pic", false);
> +        qdev_prop_set_bit(dev, "has-pit", false);
> +        qdev_prop_set_uint32(DEVICE(pci_dev), "smb_io_base", 0xb100);
> +        qdev_prop_set_bit(dev, "smm-enabled", x86_machine_is_smm_enabled(x86ms));
>         for (i = 0; i < ISA_NUM_IRQS; i++) {
>             qdev_connect_gpio_out_named(dev, "isa-irqs", i, x86ms->gsi[i]);
>         }
> diff --git a/hw/microblaze/petalogix_ml605_mmu.c b/hw/microblaze/petalogix_ml605_mmu.c
> index fb7889cf67..626f9b0b56 100644
> --- a/hw/microblaze/petalogix_ml605_mmu.c
> +++ b/hw/microblaze/petalogix_ml605_mmu.c
> @@ -88,9 +88,8 @@ petalogix_ml605_init(MachineState *machine)
>      * root instructions
>      */
>     object_property_set_int(OBJECT(cpu), "use-fpu", 1, &error_abort);
> -    object_property_set_bool(OBJECT(cpu), "dcache-writeback", true,
> -                             &error_abort);
> -    object_property_set_bool(OBJECT(cpu), "endianness", true, &error_abort);
> +    qdev_prop_set_bit(DEVICE(cpu), "dcache-writeback", true);
> +    qdev_prop_set_bit(DEVICE(cpu), "endianness", true);
>     qdev_realize(DEVICE(cpu), NULL, &error_abort);
> 
>     /* Attach emulated BRAM through the LMB.  */
> diff --git a/hw/microblaze/xlnx-zynqmp-pmu.c b/hw/microblaze/xlnx-zynqmp-pmu.c
> index 5a2016672a..19cc5efee3 100644
> --- a/hw/microblaze/xlnx-zynqmp-pmu.c
> +++ b/hw/microblaze/xlnx-zynqmp-pmu.c
> @@ -18,6 +18,7 @@
> #include "qemu/osdep.h"
> #include "qapi/error.h"
> #include "exec/address-spaces.h"
> +#include "hw/qdev-properties.h"
> #include "hw/boards.h"
> #include "cpu.h"
> #include "boot.h"
> @@ -79,19 +80,14 @@ static void xlnx_zynqmp_pmu_soc_realize(DeviceState *dev, Error **errp)
> 
>     object_property_set_uint(OBJECT(&s->cpu), "base-vectors",
>                              XLNX_ZYNQMP_PMU_ROM_ADDR, &error_abort);
> -    object_property_set_bool(OBJECT(&s->cpu), "use-stack-protection", true,
> -                             &error_abort);
> +    qdev_prop_set_bit(DEVICE(&s->cpu), "use-stack-protection", true);
>     object_property_set_uint(OBJECT(&s->cpu), "use-fpu", 0, &error_abort);
>     object_property_set_uint(OBJECT(&s->cpu), "use-hw-mul", 0, &error_abort);
> -    object_property_set_bool(OBJECT(&s->cpu), "use-barrel", true,
> -                             &error_abort);
> -    object_property_set_bool(OBJECT(&s->cpu), "use-msr-instr", true,
> -                             &error_abort);
> -    object_property_set_bool(OBJECT(&s->cpu), "use-pcmp-instr", true,
> -                             &error_abort);
> -    object_property_set_bool(OBJECT(&s->cpu), "use-mmu", false, &error_abort);
> -    object_property_set_bool(OBJECT(&s->cpu), "endianness", true,
> -                             &error_abort);
> +    qdev_prop_set_bit(DEVICE(&s->cpu), "use-barrel", true);
> +    qdev_prop_set_bit(DEVICE(&s->cpu), "use-msr-instr", true);
> +    qdev_prop_set_bit(DEVICE(&s->cpu), "use-pcmp-instr", true);
> +    qdev_prop_set_bit(DEVICE(&s->cpu), "use-mmu", false);
> +    qdev_prop_set_bit(DEVICE(&s->cpu), "endianness", true);
>     object_property_set_str(OBJECT(&s->cpu), "version", "8.40.b",
>                             &error_abort);
>     object_property_set_uint(OBJECT(&s->cpu), "pvr", 0, &error_abort);
> diff --git a/hw/mips/cps.c b/hw/mips/cps.c
> index 4f12e23ab5..ee2a8d5563 100644
> --- a/hw/mips/cps.c
> +++ b/hw/mips/cps.c
> @@ -78,8 +78,7 @@ static void mips_cps_realize(DeviceState *dev, Error **errp)
>         CPUMIPSState *env = &cpu->env;
> 
>         /* All VPs are halted on reset. Leave powering up to CPC. */
> -        object_property_set_bool(OBJECT(cpu), "start-powered-off", true,
> -                                 &error_abort);
> +        qdev_prop_set_bit(DEVICE(cpu), "start-powered-off", true);
> 
>         /* All cores use the same clock tree */
>         qdev_connect_clock_in(DEVICE(cpu), "clk-in", s->clock);
> diff --git a/hw/ppc/e500.c b/hw/ppc/e500.c
> index 566f1200dd..a63d48c512 100644
> --- a/hw/ppc/e500.c
> +++ b/hw/ppc/e500.c
> @@ -954,8 +954,7 @@ void ppce500_init(MachineState *machine)
>          * Secondary CPU starts in halted state for now. Needs to change
>          * when implementing non-kernel boot.
>          */
> -        object_property_set_bool(OBJECT(cs), "start-powered-off", i != 0,
> -                                 &error_abort);
> +        qdev_prop_set_bit(DEVICE(cs), "start-powered-off", i != 0);
>         qdev_realize_and_unref(DEVICE(cs), NULL, &error_fatal);
> 
>         if (!firstenv) {
> diff --git a/hw/ppc/spapr_pci.c b/hw/ppc/spapr_pci.c
> index 6760823e13..266cf6c9e6 100644
> --- a/hw/ppc/spapr_pci.c
> +++ b/hw/ppc/spapr_pci.c
> @@ -2490,8 +2490,7 @@ static int spapr_switch_one_vga(DeviceState *dev, void *opaque)
>         || object_dynamic_cast(OBJECT(dev), "secondary-vga")
>         || object_dynamic_cast(OBJECT(dev), "bochs-display")
>         || object_dynamic_cast(OBJECT(dev), "virtio-vga")) {
> -        object_property_set_bool(OBJECT(dev), "big-endian-framebuffer", be,
> -                                 &error_abort);
> +        qdev_prop_set_bit(dev, "big-endian-framebuffer", be);
>     }
>     return 0;
> }
> diff --git a/hw/rx/rx-gdbsim.c b/hw/rx/rx-gdbsim.c
> index 47c17026c7..53d3d560c8 100644
> --- a/hw/rx/rx-gdbsim.c
> +++ b/hw/rx/rx-gdbsim.c
> @@ -21,6 +21,7 @@
> #include "qemu/error-report.h"
> #include "qemu/guest-random.h"
> #include "qapi/error.h"
> +#include "hw/qdev-properties.h"
> #include "hw/loader.h"
> #include "hw/rx/rx62n.h"
> #include "sysemu/qtest.h"
> @@ -103,8 +104,7 @@ static void rx_gdbsim_init(MachineState *machine)
>                              &error_abort);
>     object_property_set_uint(OBJECT(&s->mcu), "xtal-frequency-hz",
>                              rxc->xtal_freq_hz, &error_abort);
> -    object_property_set_bool(OBJECT(&s->mcu), "load-kernel",
> -                             kernel_filename != NULL, &error_abort);
> +    qdev_prop_set_bit(DEVICE(&s->mcu), "load-kernel", kernel_filename != NULL);
> 
>     if (!kernel_filename) {
>         if (machine->firmware) {
> diff --git a/hw/sparc/sun4m.c b/hw/sparc/sun4m.c
> index 64895aebe3..d631d555d8 100644
> --- a/hw/sparc/sun4m.c
> +++ b/hw/sparc/sun4m.c
> @@ -803,8 +803,7 @@ static void cpu_devinit(const char *cpu_type, unsigned int id,
>     env = &cpu->env;
> 
>     qemu_register_reset(sun4m_cpu_reset, cpu);
> -    object_property_set_bool(OBJECT(cpu), "start-powered-off", id != 0,
> -                             &error_abort);
> +    qdev_prop_set_bit(DEVICE(cpu), "start-powered-off", id != 0);
>     qdev_realize_and_unref(DEVICE(cpu), NULL, &error_fatal);
>     cpu_sparc_set_id(env, id);
>     *cpu_irqs = qemu_allocate_irqs(cpu_set_irq, cpu, MAX_PILS);
> -- 
> 2.41.0
> 

Re: [PATCH-for-9.0 v2 5/8] hw: Prefer qdev_prop_set_bit over object_property_set_bool for QDev

[Harsh Prateek Bora]

On 11/23/23 20:08, Philippe Mathieu-Daudé wrote:
> The QOM API is lower level than the QDev one. When an instance is
> QDev and setting the property can not fail (using &error_abort),
> prefer qdev_prop_set_bit() over object_property_set_bool().
> 
> Mechanical transformation using the following coccinelle patch:
> 
>    @@
>    expression o, p, v;
>    @@
>    -            object_property_set_bool(OBJECT(o), p, v, &error_abort)
>    +            qdev_prop_set_bit(DEVICE(o), p, v)
>    @@@@
>    -            object_property_set_bool(o, p, v, &error_abort)
>    +            qdev_prop_set_bit(DEVICE(o), p, v)
> 
> manually adding the missing "hw/qdev-properties.h" header.
> 
> In hw/arm/armsse.c we use the available 'cpudev' instead of 'cpuobj'.
> 
> Suggested-by: Markus Armbruster <armbru@redhat.com>
> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
> ---
>   hw/acpi/cpu_hotplug.c               |  7 +++----
>   hw/acpi/ich9.c                      |  4 ++--
>   hw/acpi/piix4.c                     |  4 ++--
>   hw/arm/armsse.c                     |  3 +--
>   hw/arm/armv7m.c                     |  3 +--
>   hw/arm/aspeed_ast2400.c             |  3 +--
>   hw/arm/aspeed_ast2600.c             |  9 +++------
>   hw/arm/bcm2835_peripherals.c        |  3 +--
>   hw/arm/bcm2836.c                    |  4 ++--
>   hw/arm/boot.c                       |  4 ++--
>   hw/arm/fsl-imx25.c                  |  3 +--
>   hw/arm/fsl-imx31.c                  |  3 +--
>   hw/arm/fsl-imx6.c                   | 12 ++++--------
>   hw/arm/fsl-imx6ul.c                 |  8 ++++----
>   hw/arm/fsl-imx7.c                   | 10 ++++------
>   hw/arm/npcm7xx.c                    |  9 +++------
>   hw/arm/xlnx-versal.c                |  9 +++------
>   hw/arm/xlnx-zynqmp.c                |  9 +++------
>   hw/core/bus.c                       |  2 +-
>   hw/core/qdev.c                      |  2 +-
>   hw/i386/pc_piix.c                   | 19 ++++++-------------
>   hw/microblaze/petalogix_ml605_mmu.c |  5 ++---
>   hw/microblaze/xlnx-zynqmp-pmu.c     | 18 +++++++-----------
>   hw/mips/cps.c                       |  3 +--
>   hw/ppc/e500.c                       |  3 +--
>   hw/ppc/spapr_pci.c                  |  3 +--

For spapr:
Reviewed-by: Harsh Prateek Bora <harshpb@linux.ibm.com>

>   hw/rx/rx-gdbsim.c                   |  4 ++--
>   hw/sparc/sun4m.c                    |  3 +--
>   28 files changed, 64 insertions(+), 105 deletions(-)
> 
> diff --git a/hw/acpi/cpu_hotplug.c b/hw/acpi/cpu_hotplug.c
> index 634bbecb31..1338c037b5 100644
> --- a/hw/acpi/cpu_hotplug.c
> +++ b/hw/acpi/cpu_hotplug.c
> @@ -12,6 +12,7 @@
>   #include "qemu/osdep.h"
>   #include "hw/acpi/cpu_hotplug.h"
>   #include "qapi/error.h"
> +#include "hw/qdev-properties.h"
>   #include "hw/core/cpu.h"
>   #include "hw/i386/pc.h"
>   #include "hw/pci/pci.h"
> @@ -41,8 +42,7 @@ static void cpu_status_write(void *opaque, hwaddr addr, uint64_t data,
>        */
>       if (addr == 0 && data == 0) {
>           AcpiCpuHotplug *cpus = opaque;
> -        object_property_set_bool(cpus->device, "cpu-hotplug-legacy", false,
> -                                 &error_abort);
> +        qdev_prop_set_bit(DEVICE(cpus->device), "cpu-hotplug-legacy", false);
>       }
>   }
>   
> @@ -66,8 +66,7 @@ static void acpi_set_cpu_present_bit(AcpiCpuHotplug *g, CPUState *cpu)
>   
>       cpu_id = k->get_arch_id(cpu);
>       if ((cpu_id / 8) >= ACPI_GPE_PROC_LEN) {
> -        object_property_set_bool(g->device, "cpu-hotplug-legacy", false,
> -                                 &error_abort);
> +        qdev_prop_set_bit(DEVICE(g->device), "cpu-hotplug-legacy", false);
>           return;
>       }
>   
> diff --git a/hw/acpi/ich9.c b/hw/acpi/ich9.c
> index 25e2c7243e..64b00673fe 100644
> --- a/hw/acpi/ich9.c
> +++ b/hw/acpi/ich9.c
> @@ -30,6 +30,7 @@
>   #include "hw/pci/pci.h"
>   #include "migration/vmstate.h"
>   #include "qemu/timer.h"
> +#include "hw/qdev-properties.h"
>   #include "hw/core/cpu.h"
>   #include "sysemu/reset.h"
>   #include "sysemu/runstate.h"
> @@ -197,8 +198,7 @@ static bool vmstate_test_use_cpuhp(void *opaque)
>   static int vmstate_cpuhp_pre_load(void *opaque)
>   {
>       ICH9LPCPMRegs *s = opaque;
> -    Object *obj = OBJECT(s->gpe_cpu.device);
> -    object_property_set_bool(obj, "cpu-hotplug-legacy", false, &error_abort);
> +    qdev_prop_set_bit(DEVICE(s->gpe_cpu.device), "cpu-hotplug-legacy", false);
>       return 0;
>   }
>   
> diff --git a/hw/acpi/piix4.c b/hw/acpi/piix4.c
> index dd523d2e4c..215929ac6a 100644
> --- a/hw/acpi/piix4.c
> +++ b/hw/acpi/piix4.c
> @@ -203,8 +203,8 @@ static bool vmstate_test_use_cpuhp(void *opaque)
>   
>   static int vmstate_cpuhp_pre_load(void *opaque)
>   {
> -    Object *obj = OBJECT(opaque);
> -    object_property_set_bool(obj, "cpu-hotplug-legacy", false, &error_abort);
> +    DeviceState *dev = DEVICE(opaque);
> +    qdev_prop_set_bit(dev, "cpu-hotplug-legacy", false);
>       return 0;
>   }
>   
> diff --git a/hw/arm/armsse.c b/hw/arm/armsse.c
> index 4672df180f..546b15e658 100644
> --- a/hw/arm/armsse.c
> +++ b/hw/arm/armsse.c
> @@ -1022,8 +1022,7 @@ static void armsse_realize(DeviceState *dev, Error **errp)
>            * later if necessary.
>            */
>           if (extract32(info->cpuwait_rst, i, 1)) {
> -            object_property_set_bool(cpuobj, "start-powered-off", true,
> -                                     &error_abort);
> +            qdev_prop_set_bit(cpudev, "start-powered-off", true);
>           }
>           if (!s->cpu_fpu[i]) {
>               if (!object_property_set_bool(cpuobj, "vfp", false, errp)) {
> diff --git a/hw/arm/armv7m.c b/hw/arm/armv7m.c
> index cbaebe9bf8..3a6d72b0f3 100644
> --- a/hw/arm/armv7m.c
> +++ b/hw/arm/armv7m.c
> @@ -328,8 +328,7 @@ static void armv7m_realize(DeviceState *dev, Error **errp)
>               return;
>           }
>       }
> -    object_property_set_bool(OBJECT(s->cpu), "start-powered-off",
> -                             s->start_powered_off, &error_abort);
> +    qdev_prop_set_bit(DEVICE(s->cpu), "start-powered-off", s->start_powered_off);
>   
>       /*
>        * Real M-profile hardware can be configured with a different number of
> diff --git a/hw/arm/aspeed_ast2400.c b/hw/arm/aspeed_ast2400.c
> index a4334c81b8..4a247bfcbb 100644
> --- a/hw/arm/aspeed_ast2400.c
> +++ b/hw/arm/aspeed_ast2400.c
> @@ -420,8 +420,7 @@ static void aspeed_ast2400_soc_realize(DeviceState *dev, Error **errp)
>   
>       /* Net */
>       for (i = 0; i < sc->macs_num; i++) {
> -        object_property_set_bool(OBJECT(&s->ftgmac100[i]), "aspeed", true,
> -                                 &error_abort);
> +        qdev_prop_set_bit(DEVICE(&s->ftgmac100[i]), "aspeed", true);
>           if (!sysbus_realize(SYS_BUS_DEVICE(&s->ftgmac100[i]), errp)) {
>               return;
>           }
> diff --git a/hw/arm/aspeed_ast2600.c b/hw/arm/aspeed_ast2600.c
> index b965fbab5e..5ec8ad73cd 100644
> --- a/hw/arm/aspeed_ast2600.c
> +++ b/hw/arm/aspeed_ast2600.c
> @@ -317,10 +317,8 @@ static void aspeed_soc_ast2600_realize(DeviceState *dev, Error **errp)
>   
>           object_property_set_int(OBJECT(&a->cpu[i]), "cntfrq", 1125000000,
>                                   &error_abort);
> -        object_property_set_bool(OBJECT(&a->cpu[i]), "neon", false,
> -                                &error_abort);
> -        object_property_set_bool(OBJECT(&a->cpu[i]), "vfp-d32", false,
> -                                &error_abort);
> +        qdev_prop_set_bit(DEVICE(&a->cpu[i]), "neon", false);
> +        qdev_prop_set_bit(DEVICE(&a->cpu[i]), "vfp-d32", false);
>           object_property_set_link(OBJECT(&a->cpu[i]), "memory",
>                                    OBJECT(s->memory), &error_abort);
>   
> @@ -500,8 +498,7 @@ static void aspeed_soc_ast2600_realize(DeviceState *dev, Error **errp)
>   
>       /* Net */
>       for (i = 0; i < sc->macs_num; i++) {
> -        object_property_set_bool(OBJECT(&s->ftgmac100[i]), "aspeed", true,
> -                                 &error_abort);
> +        qdev_prop_set_bit(DEVICE(&s->ftgmac100[i]), "aspeed", true);
>           if (!sysbus_realize(SYS_BUS_DEVICE(&s->ftgmac100[i]), errp)) {
>               return;
>           }
> diff --git a/hw/arm/bcm2835_peripherals.c b/hw/arm/bcm2835_peripherals.c
> index 0233038b95..c07ca8817b 100644
> --- a/hw/arm/bcm2835_peripherals.c
> +++ b/hw/arm/bcm2835_peripherals.c
> @@ -303,8 +303,7 @@ static void bcm2835_peripherals_realize(DeviceState *dev, Error **errp)
>                                &error_abort);
>       object_property_set_uint(OBJECT(&s->sdhci), "capareg",
>                                BCM2835_SDHC_CAPAREG, &error_abort);
> -    object_property_set_bool(OBJECT(&s->sdhci), "pending-insert-quirk", true,
> -                             &error_abort);
> +    qdev_prop_set_bit(DEVICE(&s->sdhci), "pending-insert-quirk", true);
>       if (!sysbus_realize(SYS_BUS_DEVICE(&s->sdhci), errp)) {
>           return;
>       }
> diff --git a/hw/arm/bcm2836.c b/hw/arm/bcm2836.c
> index b0674a22a6..1fdc3be6bb 100644
> --- a/hw/arm/bcm2836.c
> +++ b/hw/arm/bcm2836.c
> @@ -135,8 +135,8 @@ static void bcm2836_realize(DeviceState *dev, Error **errp)
>                                   bc->peri_base, &error_abort);
>   
>           /* start powered off if not enabled */
> -        object_property_set_bool(OBJECT(&s->cpu[n].core), "start-powered-off",
> -                                 n >= s->enabled_cpus, &error_abort);
> +        qdev_prop_set_bit(DEVICE(&s->cpu[n].core), "start-powered-off",
> +                          n >= s->enabled_cpus);
>   
>           if (!qdev_realize(DEVICE(&s->cpu[n].core), NULL, errp)) {
>               return;
> diff --git a/hw/arm/boot.c b/hw/arm/boot.c
> index 84ea6a807a..ebed887e5e 100644
> --- a/hw/arm/boot.c
> +++ b/hw/arm/boot.c
> @@ -12,6 +12,7 @@
>   #include "qemu/error-report.h"
>   #include "qapi/error.h"
>   #include <libfdt.h>
> +#include "hw/qdev-properties.h"
>   #include "hw/arm/boot.h"
>   #include "hw/arm/linux-boot-if.h"
>   #include "sysemu/kvm.h"
> @@ -1287,8 +1288,7 @@ void arm_load_kernel(ARMCPU *cpu, MachineState *ms, struct arm_boot_info *info)
>                * CPU.
>                */
>               if (cs != first_cpu) {
> -                object_property_set_bool(cpuobj, "start-powered-off", true,
> -                                         &error_abort);
> +                qdev_prop_set_bit(DEVICE(cpuobj), "start-powered-off", true);
>               }
>           }
>       }
> diff --git a/hw/arm/fsl-imx25.c b/hw/arm/fsl-imx25.c
> index 9aabbf7f58..fc6a7c8a8b 100644
> --- a/hw/arm/fsl-imx25.c
> +++ b/hw/arm/fsl-imx25.c
> @@ -272,8 +272,7 @@ static void fsl_imx25_realize(DeviceState *dev, Error **errp)
>       }
>   
>       /* Watchdog */
> -    object_property_set_bool(OBJECT(&s->wdt), "pretimeout-support", true,
> -                             &error_abort);
> +    qdev_prop_set_bit(DEVICE(&s->wdt), "pretimeout-support", true);
>       sysbus_realize(SYS_BUS_DEVICE(&s->wdt), &error_abort);
>       sysbus_mmio_map(SYS_BUS_DEVICE(&s->wdt), 0, FSL_IMX25_WDT_ADDR);
>       sysbus_connect_irq(SYS_BUS_DEVICE(&s->wdt), 0,
> diff --git a/hw/arm/fsl-imx31.c b/hw/arm/fsl-imx31.c
> index def27bb913..71f50ca802 100644
> --- a/hw/arm/fsl-imx31.c
> +++ b/hw/arm/fsl-imx31.c
> @@ -171,8 +171,7 @@ static void fsl_imx31_realize(DeviceState *dev, Error **errp)
>               { FSL_IMX31_GPIO3_ADDR, FSL_IMX31_GPIO3_IRQ }
>           };
>   
> -        object_property_set_bool(OBJECT(&s->gpio[i]), "has-edge-sel", false,
> -                                 &error_abort);
> +        qdev_prop_set_bit(DEVICE(&s->gpio[i]), "has-edge-sel", false);
>           if (!sysbus_realize(SYS_BUS_DEVICE(&s->gpio[i]), errp)) {
>               return;
>           }
> diff --git a/hw/arm/fsl-imx6.c b/hw/arm/fsl-imx6.c
> index 7dc42cbfe6..17c399a37e 100644
> --- a/hw/arm/fsl-imx6.c
> +++ b/hw/arm/fsl-imx6.c
> @@ -128,8 +128,7 @@ static void fsl_imx6_realize(DeviceState *dev, Error **errp)
>   
>           /* All CPU but CPU 0 start in power off mode */
>           if (i) {
> -            object_property_set_bool(OBJECT(&s->cpu[i]), "start-powered-off",
> -                                     true, &error_abort);
> +            qdev_prop_set_bit(DEVICE(&s->cpu[i]), "start-powered-off", true);
>           }
>   
>           if (!qdev_realize(DEVICE(&s->cpu[i]), NULL, errp)) {
> @@ -288,10 +287,8 @@ static void fsl_imx6_realize(DeviceState *dev, Error **errp)
>               },
>           };
>   
> -        object_property_set_bool(OBJECT(&s->gpio[i]), "has-edge-sel", true,
> -                                 &error_abort);
> -        object_property_set_bool(OBJECT(&s->gpio[i]), "has-upper-pin-irq",
> -                                 true, &error_abort);
> +        qdev_prop_set_bit(DEVICE(&s->gpio[i]), "has-edge-sel", true);
> +        qdev_prop_set_bit(DEVICE(&s->gpio[i]), "has-upper-pin-irq", true);
>           if (!sysbus_realize(SYS_BUS_DEVICE(&s->gpio[i]), errp)) {
>               return;
>           }
> @@ -412,8 +409,7 @@ static void fsl_imx6_realize(DeviceState *dev, Error **errp)
>               FSL_IMX6_WDOG2_IRQ,
>           };
>   
> -        object_property_set_bool(OBJECT(&s->wdt[i]), "pretimeout-support",
> -                                 true, &error_abort);
> +        qdev_prop_set_bit(DEVICE(&s->wdt[i]), "pretimeout-support", true);
>           sysbus_realize(SYS_BUS_DEVICE(&s->wdt[i]), &error_abort);
>   
>           sysbus_mmio_map(SYS_BUS_DEVICE(&s->wdt[i]), 0, FSL_IMX6_WDOGn_ADDR[i]);
> diff --git a/hw/arm/fsl-imx6ul.c b/hw/arm/fsl-imx6ul.c
> index e37b69a5e1..4f4f2a6f41 100644
> --- a/hw/arm/fsl-imx6ul.c
> +++ b/hw/arm/fsl-imx6ul.c
> @@ -410,8 +410,8 @@ static void fsl_imx6ul_realize(DeviceState *dev, Error **errp)
>        * and we have to set all properties before calling sysbus_realize().
>        */
>       for (i = 0; i < FSL_IMX6UL_NUM_ETHS; i++) {
> -        object_property_set_bool(OBJECT(&s->eth[i]), "phy-connected",
> -                                 s->phy_connected[i], &error_abort);
> +        qdev_prop_set_bit(DEVICE(&s->eth[i]), "phy-connected",
> +                          s->phy_connected[i]);
>           /*
>            * If the MDIO bus on this controller is not connected, assume the
>            * other controller provides support for it.
> @@ -542,8 +542,8 @@ static void fsl_imx6ul_realize(DeviceState *dev, Error **errp)
>               FSL_IMX6UL_WDOG3_IRQ,
>           };
>   
> -        object_property_set_bool(OBJECT(&s->wdt[i]), "pretimeout-support",
> -                                 true, &error_abort);
> +        qdev_prop_set_bit(DEVICE(&s->wdt[i]), "pretimeout-support",
> +                          true);
>           sysbus_realize(SYS_BUS_DEVICE(&s->wdt[i]), &error_abort);
>   
>           sysbus_mmio_map(SYS_BUS_DEVICE(&s->wdt[i]), 0,
> diff --git a/hw/arm/fsl-imx7.c b/hw/arm/fsl-imx7.c
> index 474cfdc87c..3138ffeb08 100644
> --- a/hw/arm/fsl-imx7.c
> +++ b/hw/arm/fsl-imx7.c
> @@ -192,8 +192,7 @@ static void fsl_imx7_realize(DeviceState *dev, Error **errp)
>                * Secondary CPUs start in powered-down state (and can be
>                * powered up via the SRC system reset controller)
>                */
> -            object_property_set_bool(o, "start-powered-off", true,
> -                                     &error_abort);
> +            qdev_prop_set_bit(DEVICE(o), "start-powered-off", true);
>           }
>   
>           qdev_realize(DEVICE(o), NULL, &error_abort);
> @@ -424,8 +423,8 @@ static void fsl_imx7_realize(DeviceState *dev, Error **errp)
>        * and we have to set all properties before calling sysbus_realize().
>        */
>       for (i = 0; i < FSL_IMX7_NUM_ETHS; i++) {
> -        object_property_set_bool(OBJECT(&s->eth[i]), "phy-connected",
> -                                 s->phy_connected[i], &error_abort);
> +        qdev_prop_set_bit(DEVICE(&s->eth[i]), "phy-connected",
> +                          s->phy_connected[i]);
>           /*
>            * If the MDIO bus on this controller is not connected, assume the
>            * other controller provides support for it.
> @@ -513,8 +512,7 @@ static void fsl_imx7_realize(DeviceState *dev, Error **errp)
>               FSL_IMX7_WDOG4_IRQ,
>           };
>   
> -        object_property_set_bool(OBJECT(&s->wdt[i]), "pretimeout-support",
> -                                 true, &error_abort);
> +        qdev_prop_set_bit(DEVICE(&s->wdt[i]), "pretimeout-support", true);
>           sysbus_realize(SYS_BUS_DEVICE(&s->wdt[i]), &error_abort);
>   
>           sysbus_mmio_map(SYS_BUS_DEVICE(&s->wdt[i]), 0, FSL_IMX7_WDOGn_ADDR[i]);
> diff --git a/hw/arm/npcm7xx.c b/hw/arm/npcm7xx.c
> index 15ff21d047..7022df3cfa 100644
> --- a/hw/arm/npcm7xx.c
> +++ b/hw/arm/npcm7xx.c
> @@ -478,12 +478,10 @@ static void npcm7xx_realize(DeviceState *dev, Error **errp)
>                                   &error_abort);
>           object_property_set_int(OBJECT(&s->cpu[i]), "reset-cbar",
>                                   NPCM7XX_GIC_CPU_IF_ADDR, &error_abort);
> -        object_property_set_bool(OBJECT(&s->cpu[i]), "reset-hivecs", true,
> -                                 &error_abort);
> +        qdev_prop_set_bit(DEVICE(&s->cpu[i]), "reset-hivecs", true);
>   
>           /* Disable security extensions. */
> -        object_property_set_bool(OBJECT(&s->cpu[i]), "has_el3", false,
> -                                 &error_abort);
> +        qdev_prop_set_bit(DEVICE(&s->cpu[i]), "has_el3", false);
>   
>           if (!qdev_realize(DEVICE(&s->cpu[i]), NULL, errp)) {
>               return;
> @@ -613,8 +611,7 @@ static void npcm7xx_realize(DeviceState *dev, Error **errp)
>       }
>   
>       /* USB Host */
> -    object_property_set_bool(OBJECT(&s->ehci), "companion-enable", true,
> -                             &error_abort);
> +    qdev_prop_set_bit(DEVICE(&s->ehci), "companion-enable", true);
>       sysbus_realize(SYS_BUS_DEVICE(&s->ehci), &error_abort);
>       sysbus_mmio_map(SYS_BUS_DEVICE(&s->ehci), 0, NPCM7XX_EHCI_BA);
>       sysbus_connect_irq(SYS_BUS_DEVICE(&s->ehci), 0,
> diff --git a/hw/arm/xlnx-versal.c b/hw/arm/xlnx-versal.c
> index 9600551c44..e3b730f5f5 100644
> --- a/hw/arm/xlnx-versal.c
> +++ b/hw/arm/xlnx-versal.c
> @@ -48,8 +48,7 @@ static void versal_create_apu_cpus(Versal *s)
>           obj = OBJECT(&s->fpd.apu.cpu[i]);
>           if (i) {
>               /* Secondary CPUs start in powered-down state */
> -            object_property_set_bool(obj, "start-powered-off", true,
> -                                     &error_abort);
> +            qdev_prop_set_bit(DEVICE(obj), "start-powered-off", true);
>           }
>   
>           object_property_set_int(obj, "core-count", ARRAY_SIZE(s->fpd.apu.cpu),
> @@ -150,8 +149,7 @@ static void versal_create_rpu_cpus(Versal *s)
>                                   "rpu-cpu[*]", &s->lpd.rpu.cpu[i],
>                                   XLNX_VERSAL_RCPU_TYPE);
>           obj = OBJECT(&s->lpd.rpu.cpu[i]);
> -        object_property_set_bool(obj, "start-powered-off", true,
> -                                 &error_abort);
> +        qdev_prop_set_bit(DEVICE(obj), "start-powered-off", true);
>   
>           object_property_set_int(obj, "mp-affinity", 0x100 | i, &error_abort);
>           object_property_set_int(obj, "core-count", ARRAY_SIZE(s->lpd.rpu.cpu),
> @@ -536,8 +534,7 @@ static void versal_create_ospi(Versal *s, qemu_irq *pic)
>                               &s->pmc.iou.ospi.dma_src,
>                               TYPE_XLNX_CSU_DMA);
>   
> -    object_property_set_bool(OBJECT(&s->pmc.iou.ospi.dma_src), "is-dst",
> -                             false, &error_abort);
> +    qdev_prop_set_bit(DEVICE(&s->pmc.iou.ospi.dma_src), "is-dst", false);
>   
>       object_property_set_link(OBJECT(&s->pmc.iou.ospi.dma_src),
>                               "dma", OBJECT(mr_dac), &error_abort);
> diff --git a/hw/arm/xlnx-zynqmp.c b/hw/arm/xlnx-zynqmp.c
> index 5905a33015..f3ca3a7527 100644
> --- a/hw/arm/xlnx-zynqmp.c
> +++ b/hw/arm/xlnx-zynqmp.c
> @@ -237,14 +237,12 @@ static void xlnx_zynqmp_create_rpu(MachineState *ms, XlnxZynqMPState *s,
>               /*
>                * Secondary CPUs start in powered-down state.
>                */
> -            object_property_set_bool(OBJECT(&s->rpu_cpu[i]),
> -                                     "start-powered-off", true, &error_abort);
> +            qdev_prop_set_bit(DEVICE(&s->rpu_cpu[i]), "start-powered-off", true);
>           } else {
>               s->boot_cpu_ptr = &s->rpu_cpu[i];
>           }
>   
> -        object_property_set_bool(OBJECT(&s->rpu_cpu[i]), "reset-hivecs", true,
> -                                 &error_abort);
> +        qdev_prop_set_bit(DEVICE(&s->rpu_cpu[i]), "reset-hivecs", true);
>           if (!qdev_realize(DEVICE(&s->rpu_cpu[i]), NULL, errp)) {
>               return;
>           }
> @@ -518,8 +516,7 @@ static void xlnx_zynqmp_realize(DeviceState *dev, Error **errp)
>               /*
>                * Secondary CPUs start in powered-down state.
>                */
> -            object_property_set_bool(OBJECT(&s->apu_cpu[i]),
> -                                     "start-powered-off", true, &error_abort);
> +            qdev_prop_set_bit(DEVICE(&s->apu_cpu[i]), "start-powered-off", true);
>           } else {
>               s->boot_cpu_ptr = &s->apu_cpu[i];
>           }
> diff --git a/hw/core/bus.c b/hw/core/bus.c
> index c7831b5293..a24ebe5886 100644
> --- a/hw/core/bus.c
> +++ b/hw/core/bus.c
> @@ -176,7 +176,7 @@ bool qbus_realize(BusState *bus, Error **errp)
>   
>   void qbus_unrealize(BusState *bus)
>   {
> -    object_property_set_bool(OBJECT(bus), "realized", false, &error_abort);
> +    qdev_prop_set_bit(DEVICE(bus), "realized", false);
>   }
>   
>   static bool bus_get_realized(Object *obj, Error **errp)
> diff --git a/hw/core/qdev.c b/hw/core/qdev.c
> index 43d863b0c5..f4aa99ed77 100644
> --- a/hw/core/qdev.c
> +++ b/hw/core/qdev.c
> @@ -303,7 +303,7 @@ bool qdev_realize_and_unref(DeviceState *dev, BusState *bus, Error **errp)
>   
>   void qdev_unrealize(DeviceState *dev)
>   {
> -    object_property_set_bool(OBJECT(dev), "realized", false, &error_abort);
> +    qdev_prop_set_bit(dev, "realized", false);
>   }
>   
>   static int qdev_assert_realized_properly_cb(Object *obj, void *opaque)
> diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c
> index eace854335..6733652120 100644
> --- a/hw/i386/pc_piix.c
> +++ b/hw/i386/pc_piix.c
> @@ -263,20 +263,13 @@ static void pc_init1(MachineState *machine,
>           size_t i;
>   
>           pci_dev = pci_new_multifunction(-1, pcms->south_bridge);
> -        object_property_set_bool(OBJECT(pci_dev), "has-usb",
> -                                 machine_usb(machine), &error_abort);
> -        object_property_set_bool(OBJECT(pci_dev), "has-acpi",
> -                                 x86_machine_is_acpi_enabled(x86ms),
> -                                 &error_abort);
> -        object_property_set_bool(OBJECT(pci_dev), "has-pic", false,
> -                                 &error_abort);
> -        object_property_set_bool(OBJECT(pci_dev), "has-pit", false,
> -                                 &error_abort);
> -        qdev_prop_set_uint32(DEVICE(pci_dev), "smb_io_base", 0xb100);
> -        object_property_set_bool(OBJECT(pci_dev), "smm-enabled",
> -                                 x86_machine_is_smm_enabled(x86ms),
> -                                 &error_abort);
>           dev = DEVICE(pci_dev);
> +        qdev_prop_set_bit(dev, "has-usb", machine_usb(machine));
> +        qdev_prop_set_bit(dev, "has-acpi", x86_machine_is_acpi_enabled(x86ms));
> +        qdev_prop_set_bit(dev, "has-pic", false);
> +        qdev_prop_set_bit(dev, "has-pit", false);
> +        qdev_prop_set_uint32(DEVICE(pci_dev), "smb_io_base", 0xb100);
> +        qdev_prop_set_bit(dev, "smm-enabled", x86_machine_is_smm_enabled(x86ms));
>           for (i = 0; i < ISA_NUM_IRQS; i++) {
>               qdev_connect_gpio_out_named(dev, "isa-irqs", i, x86ms->gsi[i]);
>           }
> diff --git a/hw/microblaze/petalogix_ml605_mmu.c b/hw/microblaze/petalogix_ml605_mmu.c
> index fb7889cf67..626f9b0b56 100644
> --- a/hw/microblaze/petalogix_ml605_mmu.c
> +++ b/hw/microblaze/petalogix_ml605_mmu.c
> @@ -88,9 +88,8 @@ petalogix_ml605_init(MachineState *machine)
>        * root instructions
>        */
>       object_property_set_int(OBJECT(cpu), "use-fpu", 1, &error_abort);
> -    object_property_set_bool(OBJECT(cpu), "dcache-writeback", true,
> -                             &error_abort);
> -    object_property_set_bool(OBJECT(cpu), "endianness", true, &error_abort);
> +    qdev_prop_set_bit(DEVICE(cpu), "dcache-writeback", true);
> +    qdev_prop_set_bit(DEVICE(cpu), "endianness", true);
>       qdev_realize(DEVICE(cpu), NULL, &error_abort);
>   
>       /* Attach emulated BRAM through the LMB.  */
> diff --git a/hw/microblaze/xlnx-zynqmp-pmu.c b/hw/microblaze/xlnx-zynqmp-pmu.c
> index 5a2016672a..19cc5efee3 100644
> --- a/hw/microblaze/xlnx-zynqmp-pmu.c
> +++ b/hw/microblaze/xlnx-zynqmp-pmu.c
> @@ -18,6 +18,7 @@
>   #include "qemu/osdep.h"
>   #include "qapi/error.h"
>   #include "exec/address-spaces.h"
> +#include "hw/qdev-properties.h"
>   #include "hw/boards.h"
>   #include "cpu.h"
>   #include "boot.h"
> @@ -79,19 +80,14 @@ static void xlnx_zynqmp_pmu_soc_realize(DeviceState *dev, Error **errp)
>   
>       object_property_set_uint(OBJECT(&s->cpu), "base-vectors",
>                                XLNX_ZYNQMP_PMU_ROM_ADDR, &error_abort);
> -    object_property_set_bool(OBJECT(&s->cpu), "use-stack-protection", true,
> -                             &error_abort);
> +    qdev_prop_set_bit(DEVICE(&s->cpu), "use-stack-protection", true);
>       object_property_set_uint(OBJECT(&s->cpu), "use-fpu", 0, &error_abort);
>       object_property_set_uint(OBJECT(&s->cpu), "use-hw-mul", 0, &error_abort);
> -    object_property_set_bool(OBJECT(&s->cpu), "use-barrel", true,
> -                             &error_abort);
> -    object_property_set_bool(OBJECT(&s->cpu), "use-msr-instr", true,
> -                             &error_abort);
> -    object_property_set_bool(OBJECT(&s->cpu), "use-pcmp-instr", true,
> -                             &error_abort);
> -    object_property_set_bool(OBJECT(&s->cpu), "use-mmu", false, &error_abort);
> -    object_property_set_bool(OBJECT(&s->cpu), "endianness", true,
> -                             &error_abort);
> +    qdev_prop_set_bit(DEVICE(&s->cpu), "use-barrel", true);
> +    qdev_prop_set_bit(DEVICE(&s->cpu), "use-msr-instr", true);
> +    qdev_prop_set_bit(DEVICE(&s->cpu), "use-pcmp-instr", true);
> +    qdev_prop_set_bit(DEVICE(&s->cpu), "use-mmu", false);
> +    qdev_prop_set_bit(DEVICE(&s->cpu), "endianness", true);
>       object_property_set_str(OBJECT(&s->cpu), "version", "8.40.b",
>                               &error_abort);
>       object_property_set_uint(OBJECT(&s->cpu), "pvr", 0, &error_abort);
> diff --git a/hw/mips/cps.c b/hw/mips/cps.c
> index 4f12e23ab5..ee2a8d5563 100644
> --- a/hw/mips/cps.c
> +++ b/hw/mips/cps.c
> @@ -78,8 +78,7 @@ static void mips_cps_realize(DeviceState *dev, Error **errp)
>           CPUMIPSState *env = &cpu->env;
>   
>           /* All VPs are halted on reset. Leave powering up to CPC. */
> -        object_property_set_bool(OBJECT(cpu), "start-powered-off", true,
> -                                 &error_abort);
> +        qdev_prop_set_bit(DEVICE(cpu), "start-powered-off", true);
>   
>           /* All cores use the same clock tree */
>           qdev_connect_clock_in(DEVICE(cpu), "clk-in", s->clock);
> diff --git a/hw/ppc/e500.c b/hw/ppc/e500.c
> index 566f1200dd..a63d48c512 100644
> --- a/hw/ppc/e500.c
> +++ b/hw/ppc/e500.c
> @@ -954,8 +954,7 @@ void ppce500_init(MachineState *machine)
>            * Secondary CPU starts in halted state for now. Needs to change
>            * when implementing non-kernel boot.
>            */
> -        object_property_set_bool(OBJECT(cs), "start-powered-off", i != 0,
> -                                 &error_abort);
> +        qdev_prop_set_bit(DEVICE(cs), "start-powered-off", i != 0);
>           qdev_realize_and_unref(DEVICE(cs), NULL, &error_fatal);
>   
>           if (!firstenv) {
> diff --git a/hw/ppc/spapr_pci.c b/hw/ppc/spapr_pci.c
> index 6760823e13..266cf6c9e6 100644
> --- a/hw/ppc/spapr_pci.c
> +++ b/hw/ppc/spapr_pci.c
> @@ -2490,8 +2490,7 @@ static int spapr_switch_one_vga(DeviceState *dev, void *opaque)
>           || object_dynamic_cast(OBJECT(dev), "secondary-vga")
>           || object_dynamic_cast(OBJECT(dev), "bochs-display")
>           || object_dynamic_cast(OBJECT(dev), "virtio-vga")) {
> -        object_property_set_bool(OBJECT(dev), "big-endian-framebuffer", be,
> -                                 &error_abort);
> +        qdev_prop_set_bit(dev, "big-endian-framebuffer", be);
>       }
>       return 0;
>   }
> diff --git a/hw/rx/rx-gdbsim.c b/hw/rx/rx-gdbsim.c
> index 47c17026c7..53d3d560c8 100644
> --- a/hw/rx/rx-gdbsim.c
> +++ b/hw/rx/rx-gdbsim.c
> @@ -21,6 +21,7 @@
>   #include "qemu/error-report.h"
>   #include "qemu/guest-random.h"
>   #include "qapi/error.h"
> +#include "hw/qdev-properties.h"
>   #include "hw/loader.h"
>   #include "hw/rx/rx62n.h"
>   #include "sysemu/qtest.h"
> @@ -103,8 +104,7 @@ static void rx_gdbsim_init(MachineState *machine)
>                                &error_abort);
>       object_property_set_uint(OBJECT(&s->mcu), "xtal-frequency-hz",
>                                rxc->xtal_freq_hz, &error_abort);
> -    object_property_set_bool(OBJECT(&s->mcu), "load-kernel",
> -                             kernel_filename != NULL, &error_abort);
> +    qdev_prop_set_bit(DEVICE(&s->mcu), "load-kernel", kernel_filename != NULL);
>   
>       if (!kernel_filename) {
>           if (machine->firmware) {
> diff --git a/hw/sparc/sun4m.c b/hw/sparc/sun4m.c
> index 64895aebe3..d631d555d8 100644
> --- a/hw/sparc/sun4m.c
> +++ b/hw/sparc/sun4m.c
> @@ -803,8 +803,7 @@ static void cpu_devinit(const char *cpu_type, unsigned int id,
>       env = &cpu->env;
>   
>       qemu_register_reset(sun4m_cpu_reset, cpu);
> -    object_property_set_bool(OBJECT(cpu), "start-powered-off", id != 0,
> -                             &error_abort);
> +    qdev_prop_set_bit(DEVICE(cpu), "start-powered-off", id != 0);
>       qdev_realize_and_unref(DEVICE(cpu), NULL, &error_fatal);
>       cpu_sparc_set_id(env, id);
>       *cpu_irqs = qemu_allocate_irqs(cpu_set_irq, cpu, MAX_PILS);

Re: [PATCH-for-9.0 v2 5/8] hw: Prefer qdev_prop_set_bit over object_property_set_bool for QDev

[Peter Maydell]

On Thu, 23 Nov 2023 at 14:38, Philippe Mathieu-Daudé <philmd@linaro.org> wrote:
>
> The QOM API is lower level than the QDev one. When an instance is
> QDev and setting the property can not fail (using &error_abort),
> prefer qdev_prop_set_bit() over object_property_set_bool().
>
> Mechanical transformation using the following coccinelle patch:
>
>   @@
>   expression o, p, v;
>   @@
>   -            object_property_set_bool(OBJECT(o), p, v, &error_abort)
>   +            qdev_prop_set_bit(DEVICE(o), p, v)
>   @@@@
>   -            object_property_set_bool(o, p, v, &error_abort)
>   +            qdev_prop_set_bit(DEVICE(o), p, v)
>
> manually adding the missing "hw/qdev-properties.h" header.
>
> In hw/arm/armsse.c we use the available 'cpudev' instead of 'cpuobj'.
>
> Suggested-by: Markus Armbruster <armbru@redhat.com>
> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>

> @@ -1287,8 +1288,7 @@ void arm_load_kernel(ARMCPU *cpu, MachineState *ms, struct arm_boot_info *info)
>               * CPU.
>               */
>              if (cs != first_cpu) {
> -                object_property_set_bool(cpuobj, "start-powered-off", true,
> -                                         &error_abort);
> +                qdev_prop_set_bit(DEVICE(cpuobj), "start-powered-off", true);
>              }
>          }
>      }

This makes this code look a bit weird. Currently we have a loop
which has an "Object *cpuobj" which it uses to set properties,
in both cases using the object_property_* APIs. With this change,
we do half the job using a QOM API and the other half using
a qdev API. It would be good to follow up by converting the
other property-set so we can have a local Device * instead of
the Object *.


> diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c
> index eace854335..6733652120 100644
> --- a/hw/i386/pc_piix.c
> +++ b/hw/i386/pc_piix.c
> @@ -263,20 +263,13 @@ static void pc_init1(MachineState *machine,
>          size_t i;
>
>          pci_dev = pci_new_multifunction(-1, pcms->south_bridge);
> -        object_property_set_bool(OBJECT(pci_dev), "has-usb",
> -                                 machine_usb(machine), &error_abort);
> -        object_property_set_bool(OBJECT(pci_dev), "has-acpi",
> -                                 x86_machine_is_acpi_enabled(x86ms),
> -                                 &error_abort);
> -        object_property_set_bool(OBJECT(pci_dev), "has-pic", false,
> -                                 &error_abort);
> -        object_property_set_bool(OBJECT(pci_dev), "has-pit", false,
> -                                 &error_abort);
> -        qdev_prop_set_uint32(DEVICE(pci_dev), "smb_io_base", 0xb100);
> -        object_property_set_bool(OBJECT(pci_dev), "smm-enabled",
> -                                 x86_machine_is_smm_enabled(x86ms),
> -                                 &error_abort);
>          dev = DEVICE(pci_dev);
> +        qdev_prop_set_bit(dev, "has-usb", machine_usb(machine));
> +        qdev_prop_set_bit(dev, "has-acpi", x86_machine_is_acpi_enabled(x86ms));
> +        qdev_prop_set_bit(dev, "has-pic", false);
> +        qdev_prop_set_bit(dev, "has-pit", false);
> +        qdev_prop_set_uint32(DEVICE(pci_dev), "smb_io_base", 0xb100);

This line also can just use "dev".

> +        qdev_prop_set_bit(dev, "smm-enabled", x86_machine_is_smm_enabled(x86ms));
>          for (i = 0; i < ISA_NUM_IRQS; i++) {
>              qdev_connect_gpio_out_named(dev, "isa-irqs", i, x86ms->gsi[i]);
>          }

Otherwise
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>

thanks
-- PMM

[PATCH-for-9.0 v2 6/8] hw: Simplify uses of qdev_prop_set_bit(dev, 'start-powered-off')

[Philippe Mathieu-Daudé]

Simplify few qdev_prop_set_bit("start-powered-off") and re-indent.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 hw/arm/allwinner-h3.c  |  3 +--
 hw/arm/allwinner-r40.c |  3 +--
 hw/arm/bcm2836.c       |  4 ++--
 hw/arm/fsl-imx6.c      |  4 +---
 hw/arm/fsl-imx7.c      | 12 +++++-------
 5 files changed, 10 insertions(+), 16 deletions(-)

diff --git a/hw/arm/allwinner-h3.c b/hw/arm/allwinner-h3.c
index f05afddf7e..593244464a 100644
--- a/hw/arm/allwinner-h3.c
+++ b/hw/arm/allwinner-h3.c
@@ -251,8 +251,7 @@ static void allwinner_h3_realize(DeviceState *dev, Error **errp)
          * Disable secondary CPUs. Guest EL3 firmware will start
          * them via CPU reset control registers.
          */
-        qdev_prop_set_bit(DEVICE(&s->cpus[i]), "start-powered-off",
-                          i > 0);
+        qdev_prop_set_bit(DEVICE(&s->cpus[i]), "start-powered-off", i > 0);
 
         /* All exception levels required */
         qdev_prop_set_bit(DEVICE(&s->cpus[i]), "has_el3", true);
diff --git a/hw/arm/allwinner-r40.c b/hw/arm/allwinner-r40.c
index a0d367c60d..202a158fb8 100644
--- a/hw/arm/allwinner-r40.c
+++ b/hw/arm/allwinner-r40.c
@@ -304,8 +304,7 @@ static void allwinner_r40_realize(DeviceState *dev, Error **errp)
          * Disable secondary CPUs. Guest EL3 firmware will start
          * them via CPU reset control registers.
          */
-        qdev_prop_set_bit(DEVICE(&s->cpus[i]), "start-powered-off",
-                          i > 0);
+        qdev_prop_set_bit(DEVICE(&s->cpus[i]), "start-powered-off", i > 0);
 
         /* All exception levels required */
         qdev_prop_set_bit(DEVICE(&s->cpus[i]), "has_el3", true);
diff --git a/hw/arm/bcm2836.c b/hw/arm/bcm2836.c
index 1fdc3be6bb..03e6eb2fb2 100644
--- a/hw/arm/bcm2836.c
+++ b/hw/arm/bcm2836.c
@@ -99,9 +99,9 @@ static void bcm2835_realize(DeviceState *dev, Error **errp)
 
     /* Connect irq/fiq outputs from the interrupt controller. */
     sysbus_connect_irq(SYS_BUS_DEVICE(&s->peripherals), 0,
-            qdev_get_gpio_in(DEVICE(&s->cpu[0].core), ARM_CPU_IRQ));
+                       qdev_get_gpio_in(DEVICE(&s->cpu[0].core), ARM_CPU_IRQ));
     sysbus_connect_irq(SYS_BUS_DEVICE(&s->peripherals), 1,
-            qdev_get_gpio_in(DEVICE(&s->cpu[0].core), ARM_CPU_FIQ));
+                       qdev_get_gpio_in(DEVICE(&s->cpu[0].core), ARM_CPU_FIQ));
 }
 
 static void bcm2836_realize(DeviceState *dev, Error **errp)
diff --git a/hw/arm/fsl-imx6.c b/hw/arm/fsl-imx6.c
index 17c399a37e..b7f1738a89 100644
--- a/hw/arm/fsl-imx6.c
+++ b/hw/arm/fsl-imx6.c
@@ -127,9 +127,7 @@ static void fsl_imx6_realize(DeviceState *dev, Error **errp)
         }
 
         /* All CPU but CPU 0 start in power off mode */
-        if (i) {
-            qdev_prop_set_bit(DEVICE(&s->cpu[i]), "start-powered-off", true);
-        }
+        qdev_prop_set_bit(DEVICE(&s->cpu[i]), "start-powered-off", i > 0);
 
         if (!qdev_realize(DEVICE(&s->cpu[i]), NULL, errp)) {
             return;
diff --git a/hw/arm/fsl-imx7.c b/hw/arm/fsl-imx7.c
index 3138ffeb08..451801f7e8 100644
--- a/hw/arm/fsl-imx7.c
+++ b/hw/arm/fsl-imx7.c
@@ -187,13 +187,11 @@ static void fsl_imx7_realize(DeviceState *dev, Error **errp)
                                     &error_abort);
         }
 
-        if (i) {
-            /*
-             * Secondary CPUs start in powered-down state (and can be
-             * powered up via the SRC system reset controller)
-             */
-            qdev_prop_set_bit(DEVICE(o), "start-powered-off", true);
-        }
+        /*
+         * Secondary CPUs start in powered-down state (and can be
+         * powered up via the SRC system reset controller)
+         */
+        qdev_prop_set_bit(DEVICE(o), "start-powered-off", i > 0);
 
         qdev_realize(DEVICE(o), NULL, &error_abort);
     }
-- 
2.41.0

Re: [PATCH-for-9.0 v2 6/8] hw: Simplify uses of qdev_prop_set_bit(dev, 'start-powered-off')

[Peter Maydell]

On Thu, 23 Nov 2023 at 14:39, Philippe Mathieu-Daudé <philmd@linaro.org> wrote:
>
> Simplify few qdev_prop_set_bit("start-powered-off") and re-indent.
>
> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>

thanks
-- PMM

[PATCH-for-9.0 v2 7/8] hw/arm/bcm2836: Move code after error checks

[Philippe Mathieu-Daudé]

First run the code that can return errors, then on success
run what alters the instance state.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 hw/arm/bcm2836.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/hw/arm/bcm2836.c b/hw/arm/bcm2836.c
index 03e6eb2fb2..e56935f3e5 100644
--- a/hw/arm/bcm2836.c
+++ b/hw/arm/bcm2836.c
@@ -119,13 +119,6 @@ static void bcm2836_realize(DeviceState *dev, Error **errp)
         return;
     }
 
-    sysbus_mmio_map(SYS_BUS_DEVICE(&s->control), 0, bc->ctrl_base);
-
-    sysbus_connect_irq(SYS_BUS_DEVICE(&s->peripherals), 0,
-        qdev_get_gpio_in_named(DEVICE(&s->control), "gpu-irq", 0));
-    sysbus_connect_irq(SYS_BUS_DEVICE(&s->peripherals), 1,
-        qdev_get_gpio_in_named(DEVICE(&s->control), "gpu-fiq", 0));
-
     for (n = 0; n < BCM283X_NCPUS; n++) {
         object_property_set_int(OBJECT(&s->cpu[n].core), "mp-affinity",
                                 (bc->clusterid << 8) | n, &error_abort);
@@ -158,6 +151,13 @@ static void bcm2836_realize(DeviceState *dev, Error **errp)
         qdev_connect_gpio_out(DEVICE(&s->cpu[n].core), GTIMER_SEC,
                 qdev_get_gpio_in_named(DEVICE(&s->control), "cntpsirq", n));
     }
+
+    sysbus_mmio_map(SYS_BUS_DEVICE(&s->control), 0, bc->ctrl_base);
+
+    sysbus_connect_irq(SYS_BUS_DEVICE(&s->peripherals), 0,
+                    qdev_get_gpio_in_named(DEVICE(&s->control), "gpu-irq", 0));
+    sysbus_connect_irq(SYS_BUS_DEVICE(&s->peripherals), 1,
+                    qdev_get_gpio_in_named(DEVICE(&s->control), "gpu-fiq", 0));
 }
 
 static void bcm283x_class_init(ObjectClass *oc, void *data)
-- 
2.41.0

Re: [PATCH-for-9.0 v2 7/8] hw/arm/bcm2836: Move code after error checks

[Peter Maydell]

On Thu, 23 Nov 2023 at 14:39, Philippe Mathieu-Daudé <philmd@linaro.org> wrote:
>
> First run the code that can return errors, then on success
> run what alters the instance state.
>
> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
> ---
>  hw/arm/bcm2836.c | 14 +++++++-------
>  1 file changed, 7 insertions(+), 7 deletions(-)
>
> diff --git a/hw/arm/bcm2836.c b/hw/arm/bcm2836.c
> index 03e6eb2fb2..e56935f3e5 100644
> --- a/hw/arm/bcm2836.c
> +++ b/hw/arm/bcm2836.c
> @@ -119,13 +119,6 @@ static void bcm2836_realize(DeviceState *dev, Error **errp)
>          return;
>      }
>
> -    sysbus_mmio_map(SYS_BUS_DEVICE(&s->control), 0, bc->ctrl_base);
> -
> -    sysbus_connect_irq(SYS_BUS_DEVICE(&s->peripherals), 0,
> -        qdev_get_gpio_in_named(DEVICE(&s->control), "gpu-irq", 0));
> -    sysbus_connect_irq(SYS_BUS_DEVICE(&s->peripherals), 1,
> -        qdev_get_gpio_in_named(DEVICE(&s->control), "gpu-fiq", 0));
> -
>      for (n = 0; n < BCM283X_NCPUS; n++) {
>          object_property_set_int(OBJECT(&s->cpu[n].core), "mp-affinity",
>                                  (bc->clusterid << 8) | n, &error_abort);
> @@ -158,6 +151,13 @@ static void bcm2836_realize(DeviceState *dev, Error **errp)
>          qdev_connect_gpio_out(DEVICE(&s->cpu[n].core), GTIMER_SEC,
>                  qdev_get_gpio_in_named(DEVICE(&s->control), "cntpsirq", n));
>      }
> +
> +    sysbus_mmio_map(SYS_BUS_DEVICE(&s->control), 0, bc->ctrl_base);
> +
> +    sysbus_connect_irq(SYS_BUS_DEVICE(&s->peripherals), 0,
> +                    qdev_get_gpio_in_named(DEVICE(&s->control), "gpu-irq", 0));
> +    sysbus_connect_irq(SYS_BUS_DEVICE(&s->peripherals), 1,
> +                    qdev_get_gpio_in_named(DEVICE(&s->control), "gpu-fiq", 0));
>  }
>

There's no particular harm in moving the code, but given the loop
we are already doing some IRQ-connection work before doing some
things which might fail.

We don't in general do a particularly consistent job with
tidying up in realize methods that fail halfway through, but
in general "connect an IRQ between two devices both of which
are owned by this container device" and "map an MR of this device
we own into a container region we also own" are not things
which affect the overall simulation, and in theory should
be cleanup-able later (maybe even automatically by refcount
if we're really lucky).

-- PMM

[PATCH-for-9.0 v2 8/8] hw/arm/bcm2836: Add local variable to remove various DEVICE() casts

[Philippe Mathieu-Daudé]

Cast the CPU to DeviceState once.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 hw/arm/bcm2836.c | 19 ++++++++++---------
 1 file changed, 10 insertions(+), 9 deletions(-)

diff --git a/hw/arm/bcm2836.c b/hw/arm/bcm2836.c
index e56935f3e5..013cee853d 100644
--- a/hw/arm/bcm2836.c
+++ b/hw/arm/bcm2836.c
@@ -120,6 +120,8 @@ static void bcm2836_realize(DeviceState *dev, Error **errp)
     }
 
     for (n = 0; n < BCM283X_NCPUS; n++) {
+        DeviceState *cpudev = DEVICE(&s->cpu[n].core);
+
         object_property_set_int(OBJECT(&s->cpu[n].core), "mp-affinity",
                                 (bc->clusterid << 8) | n, &error_abort);
 
@@ -128,27 +130,26 @@ static void bcm2836_realize(DeviceState *dev, Error **errp)
                                 bc->peri_base, &error_abort);
 
         /* start powered off if not enabled */
-        qdev_prop_set_bit(DEVICE(&s->cpu[n].core), "start-powered-off",
-                          n >= s->enabled_cpus);
+        qdev_prop_set_bit(cpudev, "start-powered-off", n >= s->enabled_cpus);
 
-        if (!qdev_realize(DEVICE(&s->cpu[n].core), NULL, errp)) {
+        if (!qdev_realize(cpudev, NULL, errp)) {
             return;
         }
 
         /* Connect irq/fiq outputs from the interrupt controller. */
         qdev_connect_gpio_out_named(DEVICE(&s->control), "irq", n,
-                qdev_get_gpio_in(DEVICE(&s->cpu[n].core), ARM_CPU_IRQ));
+                                    qdev_get_gpio_in(cpudev, ARM_CPU_IRQ));
         qdev_connect_gpio_out_named(DEVICE(&s->control), "fiq", n,
-                qdev_get_gpio_in(DEVICE(&s->cpu[n].core), ARM_CPU_FIQ));
+                                    qdev_get_gpio_in(cpudev, ARM_CPU_FIQ));
 
         /* Connect timers from the CPU to the interrupt controller */
-        qdev_connect_gpio_out(DEVICE(&s->cpu[n].core), GTIMER_PHYS,
+        qdev_connect_gpio_out(cpudev, GTIMER_PHYS,
                 qdev_get_gpio_in_named(DEVICE(&s->control), "cntpnsirq", n));
-        qdev_connect_gpio_out(DEVICE(&s->cpu[n].core), GTIMER_VIRT,
+        qdev_connect_gpio_out(cpudev, GTIMER_VIRT,
                 qdev_get_gpio_in_named(DEVICE(&s->control), "cntvirq", n));
-        qdev_connect_gpio_out(DEVICE(&s->cpu[n].core), GTIMER_HYP,
+        qdev_connect_gpio_out(cpudev, GTIMER_HYP,
                 qdev_get_gpio_in_named(DEVICE(&s->control), "cnthpirq", n));
-        qdev_connect_gpio_out(DEVICE(&s->cpu[n].core), GTIMER_SEC,
+        qdev_connect_gpio_out(cpudev, GTIMER_SEC,
                 qdev_get_gpio_in_named(DEVICE(&s->control), "cntpsirq", n));
     }
 
-- 
2.41.0

Re: [PATCH-for-9.0 v2 8/8] hw/arm/bcm2836: Add local variable to remove various DEVICE() casts

[Peter Maydell]

On Thu, 23 Nov 2023 at 14:39, Philippe Mathieu-Daudé <philmd@linaro.org> wrote:
>
> Cast the CPU to DeviceState once.
>
> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>

thanks
-- PMM