[v3,4/4] qom/object: Use common get/set uint helpers

Several objects implemented their own uint property getters and setters,
despite them being straightforward (without any checks/validations on
the values themselves) and identical across objects. This makes use of
an enhanced API for object_property_add_uintXX_ptr() which offers
default setters.

Some of these setters used to update the value even if the type visit
failed (eg. because the value being set overflowed over the given type).
The new setter introduces a check for these errors, not updating the
value if an error occurred. The error is propagated.

Signed-off-by: Felipe Franciosi <felipe@nutanix.com>
---
 hw/acpi/ich9.c       |  95 ++++----------------------------------
 hw/isa/lpc_ich9.c    |  12 +----
 hw/misc/edu.c        |  13 ++----
 hw/pci-host/q35.c    |  14 ++----
 hw/ppc/spapr.c       |  18 ++------
 hw/vfio/pci-quirks.c |  20 +++-----
 memory.c             |  15 +-----
 target/arm/cpu.c     |  22 ++-------
 target/i386/sev.c    | 106 ++++---------------------------------------
 9 files changed, 40 insertions(+), 275 deletions(-)

On Fri, Nov 29, 2019 at 9:46 PM Felipe Franciosi <felipe@nutanix.com> wrote:
>
> Several objects implemented their own uint property getters and setters,
> despite them being straightforward (without any checks/validations on
> the values themselves) and identical across objects. This makes use of
> an enhanced API for object_property_add_uintXX_ptr() which offers
> default setters.
>
> Some of these setters used to update the value even if the type visit
> failed (eg. because the value being set overflowed over the given type).
> The new setter introduces a check for these errors, not updating the
> value if an error occurred. The error is propagated.
>
> Signed-off-by: Felipe Franciosi <felipe@nutanix.com>

Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>

> ---
>  hw/acpi/ich9.c       |  95 ++++----------------------------------
>  hw/isa/lpc_ich9.c    |  12 +----
>  hw/misc/edu.c        |  13 ++----
>  hw/pci-host/q35.c    |  14 ++----
>  hw/ppc/spapr.c       |  18 ++------
>  hw/vfio/pci-quirks.c |  20 +++-----
>  memory.c             |  15 +-----
>  target/arm/cpu.c     |  22 ++-------
>  target/i386/sev.c    | 106 ++++---------------------------------------
>  9 files changed, 40 insertions(+), 275 deletions(-)
>
> diff --git a/hw/acpi/ich9.c b/hw/acpi/ich9.c
> index 742fb78226..d9305be891 100644
> --- a/hw/acpi/ich9.c
> +++ b/hw/acpi/ich9.c
> @@ -357,81 +357,6 @@ static void ich9_pm_set_cpu_hotplug_legacy(Object *obj, bool value,
>      s->pm.cpu_hotplug_legacy = value;
>  }
>
> -static void ich9_pm_get_disable_s3(Object *obj, Visitor *v, const char *name,
> -                                   void *opaque, Error **errp)
> -{
> -    ICH9LPCPMRegs *pm = opaque;
> -    uint8_t value = pm->disable_s3;
> -
> -    visit_type_uint8(v, name, &value, errp);
> -}
> -
> -static void ich9_pm_set_disable_s3(Object *obj, Visitor *v, const char *name,
> -                                   void *opaque, Error **errp)
> -{
> -    ICH9LPCPMRegs *pm = opaque;
> -    Error *local_err = NULL;
> -    uint8_t value;
> -
> -    visit_type_uint8(v, name, &value, &local_err);
> -    if (local_err) {
> -        goto out;
> -    }
> -    pm->disable_s3 = value;
> -out:
> -    error_propagate(errp, local_err);
> -}
> -
> -static void ich9_pm_get_disable_s4(Object *obj, Visitor *v, const char *name,
> -                                   void *opaque, Error **errp)
> -{
> -    ICH9LPCPMRegs *pm = opaque;
> -    uint8_t value = pm->disable_s4;
> -
> -    visit_type_uint8(v, name, &value, errp);
> -}
> -
> -static void ich9_pm_set_disable_s4(Object *obj, Visitor *v, const char *name,
> -                                   void *opaque, Error **errp)
> -{
> -    ICH9LPCPMRegs *pm = opaque;
> -    Error *local_err = NULL;
> -    uint8_t value;
> -
> -    visit_type_uint8(v, name, &value, &local_err);
> -    if (local_err) {
> -        goto out;
> -    }
> -    pm->disable_s4 = value;
> -out:
> -    error_propagate(errp, local_err);
> -}
> -
> -static void ich9_pm_get_s4_val(Object *obj, Visitor *v, const char *name,
> -                               void *opaque, Error **errp)
> -{
> -    ICH9LPCPMRegs *pm = opaque;
> -    uint8_t value = pm->s4_val;
> -
> -    visit_type_uint8(v, name, &value, errp);
> -}
> -
> -static void ich9_pm_set_s4_val(Object *obj, Visitor *v, const char *name,
> -                               void *opaque, Error **errp)
> -{
> -    ICH9LPCPMRegs *pm = opaque;
> -    Error *local_err = NULL;
> -    uint8_t value;
> -
> -    visit_type_uint8(v, name, &value, &local_err);
> -    if (local_err) {
> -        goto out;
> -    }
> -    pm->s4_val = value;
> -out:
> -    error_propagate(errp, local_err);
> -}
> -
>  static bool ich9_pm_get_enable_tco(Object *obj, Error **errp)
>  {
>      ICH9LPCState *s = ICH9_LPC_DEVICE(obj);
> @@ -468,18 +393,14 @@ void ich9_pm_add_properties(Object *obj, ICH9LPCPMRegs *pm, Error **errp)
>                               ich9_pm_get_cpu_hotplug_legacy,
>                               ich9_pm_set_cpu_hotplug_legacy,
>                               NULL);
> -    object_property_add(obj, ACPI_PM_PROP_S3_DISABLED, "uint8",
> -                        ich9_pm_get_disable_s3,
> -                        ich9_pm_set_disable_s3,
> -                        NULL, pm, NULL);
> -    object_property_add(obj, ACPI_PM_PROP_S4_DISABLED, "uint8",
> -                        ich9_pm_get_disable_s4,
> -                        ich9_pm_set_disable_s4,
> -                        NULL, pm, NULL);
> -    object_property_add(obj, ACPI_PM_PROP_S4_VAL, "uint8",
> -                        ich9_pm_get_s4_val,
> -                        ich9_pm_set_s4_val,
> -                        NULL, pm, NULL);
> +    object_property_add_uint8_ptr(obj, ACPI_PM_PROP_S3_DISABLED,
> +                                  &pm->disable_s3, OBJ_PROP_FLAG_READWRITE,
> +                                  NULL);
> +    object_property_add_uint8_ptr(obj, ACPI_PM_PROP_S4_DISABLED,
> +                                  &pm->disable_s4, OBJ_PROP_FLAG_READWRITE,
> +                                  NULL);
> +    object_property_add_uint8_ptr(obj, ACPI_PM_PROP_S4_VAL,
> +                                  &pm->s4_val, OBJ_PROP_FLAG_READWRITE, NULL);
>      object_property_add_bool(obj, ACPI_PM_PROP_TCO_ENABLED,
>                               ich9_pm_get_enable_tco,
>                               ich9_pm_set_enable_tco,
> diff --git a/hw/isa/lpc_ich9.c b/hw/isa/lpc_ich9.c
> index c40bb3c420..b99a613954 100644
> --- a/hw/isa/lpc_ich9.c
> +++ b/hw/isa/lpc_ich9.c
> @@ -627,13 +627,6 @@ static const MemoryRegionOps ich9_rst_cnt_ops = {
>      .endianness = DEVICE_LITTLE_ENDIAN
>  };
>
> -static void ich9_lpc_get_sci_int(Object *obj, Visitor *v, const char *name,
> -                                 void *opaque, Error **errp)
> -{
> -    ICH9LPCState *lpc = ICH9_LPC_DEVICE(obj);
> -    visit_type_uint8(v, name, &lpc->sci_gsi, errp);
> -}
> -
>  static void ich9_lpc_initfn(Object *obj)
>  {
>      ICH9LPCState *lpc = ICH9_LPC_DEVICE(obj);
> @@ -641,9 +634,8 @@ static void ich9_lpc_initfn(Object *obj)
>      static const uint8_t acpi_enable_cmd = ICH9_APM_ACPI_ENABLE;
>      static const uint8_t acpi_disable_cmd = ICH9_APM_ACPI_DISABLE;
>
> -    object_property_add(obj, ACPI_PM_PROP_SCI_INT, "uint8",
> -                        ich9_lpc_get_sci_int,
> -                        NULL, NULL, NULL, NULL);
> +    object_property_add_uint8_ptr(obj, ACPI_PM_PROP_SCI_INT,
> +                                  &lpc->sci_gsi, OBJ_PROP_FLAG_READ, NULL);
>      object_property_add_uint8_ptr(OBJECT(lpc), ACPI_PM_PROP_ACPI_ENABLE_CMD,
>                                    &acpi_enable_cmd, OBJ_PROP_FLAG_READ, NULL);
>      object_property_add_uint8_ptr(OBJECT(lpc), ACPI_PM_PROP_ACPI_DISABLE_CMD,
> diff --git a/hw/misc/edu.c b/hw/misc/edu.c
> index d5e2bdbb57..ff10f5b794 100644
> --- a/hw/misc/edu.c
> +++ b/hw/misc/edu.c
> @@ -396,21 +396,14 @@ static void pci_edu_uninit(PCIDevice *pdev)
>      msi_uninit(pdev);
>  }
>
> -static void edu_obj_uint64(Object *obj, Visitor *v, const char *name,
> -                           void *opaque, Error **errp)
> -{
> -    uint64_t *val = opaque;
> -
> -    visit_type_uint64(v, name, val, errp);
> -}
> -
>  static void edu_instance_init(Object *obj)
>  {
>      EduState *edu = EDU(obj);
>
>      edu->dma_mask = (1UL << 28) - 1;
> -    object_property_add(obj, "dma_mask", "uint64", edu_obj_uint64,
> -                    edu_obj_uint64, NULL, &edu->dma_mask, NULL);
> +    object_property_add_uint64_ptr(obj, "dma_mask",
> +                                   &edu->dma_mask, OBJ_PROP_FLAG_READWRITE,
> +                                   NULL);
>  }
>
>  static void edu_class_init(ObjectClass *class, void *data)
> diff --git a/hw/pci-host/q35.c b/hw/pci-host/q35.c
> index 158d270b9f..f384ab95c6 100644
> --- a/hw/pci-host/q35.c
> +++ b/hw/pci-host/q35.c
> @@ -165,14 +165,6 @@ static void q35_host_get_pci_hole64_end(Object *obj, Visitor *v,
>      visit_type_uint64(v, name, &value, errp);
>  }
>
> -static void q35_host_get_mmcfg_size(Object *obj, Visitor *v, const char *name,
> -                                    void *opaque, Error **errp)
> -{
> -    PCIExpressHost *e = PCIE_HOST_BRIDGE(obj);
> -
> -    visit_type_uint64(v, name, &e->size, errp);
> -}
> -
>  /*
>   * NOTE: setting defaults for the mch.* fields in this table
>   * doesn't work, because mch is a separate QOM object that is
> @@ -213,6 +205,7 @@ static void q35_host_initfn(Object *obj)
>  {
>      Q35PCIHost *s = Q35_HOST_DEVICE(obj);
>      PCIHostState *phb = PCI_HOST_BRIDGE(obj);
> +    PCIExpressHost *pehb = PCIE_HOST_BRIDGE(obj);
>
>      memory_region_init_io(&phb->conf_mem, obj, &pci_host_conf_le_ops, phb,
>                            "pci-conf-idx", 4);
> @@ -242,9 +235,8 @@ static void q35_host_initfn(Object *obj)
>                          q35_host_get_pci_hole64_end,
>                          NULL, NULL, NULL, NULL);
>
> -    object_property_add(obj, PCIE_HOST_MCFG_SIZE, "uint64",
> -                        q35_host_get_mmcfg_size,
> -                        NULL, NULL, NULL, NULL);
> +    object_property_add_uint64_ptr(obj, PCIE_HOST_MCFG_SIZE,
> +                                   &pehb->size, OBJ_PROP_FLAG_READ, NULL);
>
>      object_property_add_link(obj, MCH_HOST_PROP_RAM_MEM, TYPE_MEMORY_REGION,
>                               (Object **) &s->mch.ram_memory,
> diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
> index e076f6023c..668f045023 100644
> --- a/hw/ppc/spapr.c
> +++ b/hw/ppc/spapr.c
> @@ -3227,18 +3227,6 @@ static void spapr_set_resize_hpt(Object *obj, const char *value, Error **errp)
>      }
>  }
>
> -static void spapr_get_vsmt(Object *obj, Visitor *v, const char *name,
> -                                   void *opaque, Error **errp)
> -{
> -    visit_type_uint32(v, name, (uint32_t *)opaque, errp);
> -}
> -
> -static void spapr_set_vsmt(Object *obj, Visitor *v, const char *name,
> -                                   void *opaque, Error **errp)
> -{
> -    visit_type_uint32(v, name, (uint32_t *)opaque, errp);
> -}
> -
>  static char *spapr_get_ic_mode(Object *obj, Error **errp)
>  {
>      SpaprMachineState *spapr = SPAPR_MACHINE(obj);
> @@ -3336,8 +3324,10 @@ static void spapr_instance_init(Object *obj)
>      object_property_set_description(obj, "resize-hpt",
>                                      "Resizing of the Hash Page Table (enabled, disabled, required)",
>                                      NULL);
> -    object_property_add(obj, "vsmt", "uint32", spapr_get_vsmt,
> -                        spapr_set_vsmt, NULL, &spapr->vsmt, &error_abort);
> +    object_property_add_uint32_ptr(obj, "vsmt",
> +                                   &spapr->vsmt, OBJ_PROP_FLAG_READWRITE,
> +                                   &error_abort);
> +
>      object_property_set_description(obj, "vsmt",
>                                      "Virtual SMT: KVM behaves as if this were"
>                                      " the host's SMT mode", &error_abort);
> diff --git a/hw/vfio/pci-quirks.c b/hw/vfio/pci-quirks.c
> index 136f3a9ad6..d769c99bde 100644
> --- a/hw/vfio/pci-quirks.c
> +++ b/hw/vfio/pci-quirks.c
> @@ -2187,14 +2187,6 @@ int vfio_add_virt_caps(VFIOPCIDevice *vdev, Error **errp)
>      return 0;
>  }
>
> -static void vfio_pci_nvlink2_get_tgt(Object *obj, Visitor *v,
> -                                     const char *name,
> -                                     void *opaque, Error **errp)
> -{
> -    uint64_t tgt = (uintptr_t) opaque;
> -    visit_type_uint64(v, name, &tgt, errp);
> -}
> -
>  static void vfio_pci_nvlink2_get_link_speed(Object *obj, Visitor *v,
>                                                   const char *name,
>                                                   void *opaque, Error **errp)
> @@ -2240,9 +2232,9 @@ int vfio_pci_nvidia_v100_ram_init(VFIOPCIDevice *vdev, Error **errp)
>                                 nv2reg->size, p);
>      QLIST_INSERT_HEAD(&vdev->bars[0].quirks, quirk, next);
>
> -    object_property_add(OBJECT(vdev), "nvlink2-tgt", "uint64",
> -                        vfio_pci_nvlink2_get_tgt, NULL, NULL,
> -                        (void *) (uintptr_t) cap->tgt, NULL);
> +    object_property_add_uint64_ptr(OBJECT(vdev), "nvlink2-tgt",
> +                                   (void *)(uintptr_t)cap->tgt,
> +                                   OBJ_PROP_FLAG_READ, NULL);
>      trace_vfio_pci_nvidia_gpu_setup_quirk(vdev->vbasedev.name, cap->tgt,
>                                            nv2reg->size);
>  free_exit:
> @@ -2301,9 +2293,9 @@ int vfio_pci_nvlink2_init(VFIOPCIDevice *vdev, Error **errp)
>          QLIST_INSERT_HEAD(&vdev->bars[0].quirks, quirk, next);
>      }
>
> -    object_property_add(OBJECT(vdev), "nvlink2-tgt", "uint64",
> -                        vfio_pci_nvlink2_get_tgt, NULL, NULL,
> -                        (void *) (uintptr_t) captgt->tgt, NULL);
> +    object_property_add_uint64_ptr(OBJECT(vdev), "nvlink2-tgt",
> +                                   (void *)(uintptr_t)captgt->tgt,
> +                                   OBJ_PROP_FLAG_READ, NULL);
>      trace_vfio_pci_nvlink2_setup_quirk_ssatgt(vdev->vbasedev.name, captgt->tgt,
>                                                atsdreg->size);
>
> diff --git a/memory.c b/memory.c
> index 06484c2bff..7dac2aa059 100644
> --- a/memory.c
> +++ b/memory.c
> @@ -1158,15 +1158,6 @@ void memory_region_init(MemoryRegion *mr,
>      memory_region_do_init(mr, owner, name, size);
>  }
>
> -static void memory_region_get_addr(Object *obj, Visitor *v, const char *name,
> -                                   void *opaque, Error **errp)
> -{
> -    MemoryRegion *mr = MEMORY_REGION(obj);
> -    uint64_t value = mr->addr;
> -
> -    visit_type_uint64(v, name, &value, errp);
> -}
> -
>  static void memory_region_get_container(Object *obj, Visitor *v,
>                                          const char *name, void *opaque,
>                                          Error **errp)
> @@ -1230,10 +1221,8 @@ static void memory_region_initfn(Object *obj)
>                               NULL, NULL, &error_abort);
>      op->resolve = memory_region_resolve_container;
>
> -    object_property_add(OBJECT(mr), "addr", "uint64",
> -                        memory_region_get_addr,
> -                        NULL, /* memory_region_set_addr */
> -                        NULL, NULL, &error_abort);
> +    object_property_add_uint64_ptr(OBJECT(mr), "addr",
> +                                   &mr->addr, OBJ_PROP_FLAG_READ, &error_abort);
>      object_property_add(OBJECT(mr), "priority", "uint32",
>                          memory_region_get_priority,
>                          NULL, /* memory_region_set_priority */
> diff --git a/target/arm/cpu.c b/target/arm/cpu.c
> index 7a4ac9339b..bbe25a73c4 100644
> --- a/target/arm/cpu.c
> +++ b/target/arm/cpu.c
> @@ -1039,22 +1039,6 @@ static void arm_set_pmu(Object *obj, bool value, Error **errp)
>      cpu->has_pmu = value;
>  }
>
> -static void arm_get_init_svtor(Object *obj, Visitor *v, const char *name,
> -                               void *opaque, Error **errp)
> -{
> -    ARMCPU *cpu = ARM_CPU(obj);
> -
> -    visit_type_uint32(v, name, &cpu->init_svtor, errp);
> -}
> -
> -static void arm_set_init_svtor(Object *obj, Visitor *v, const char *name,
> -                               void *opaque, Error **errp)
> -{
> -    ARMCPU *cpu = ARM_CPU(obj);
> -
> -    visit_type_uint32(v, name, &cpu->init_svtor, errp);
> -}
> -
>  void arm_cpu_post_init(Object *obj)
>  {
>      ARMCPU *cpu = ARM_CPU(obj);
> @@ -1165,9 +1149,9 @@ void arm_cpu_post_init(Object *obj)
>           * a simple DEFINE_PROP_UINT32 for this because we want to permit
>           * the property to be set after realize.
>           */
> -        object_property_add(obj, "init-svtor", "uint32",
> -                            arm_get_init_svtor, arm_set_init_svtor,
> -                            NULL, NULL, &error_abort);
> +        object_property_add_uint32_ptr(obj, "init-svtor",
> +                                       &cpu->init_svtor,
> +                                       OBJ_PROP_FLAG_READWRITE, &error_abort);
>      }
>
>      qdev_property_add_static(DEVICE(obj), &arm_cpu_cfgend_property,
> diff --git a/target/i386/sev.c b/target/i386/sev.c
> index 024bb24e51..846018a12d 100644
> --- a/target/i386/sev.c
> +++ b/target/i386/sev.c
> @@ -266,94 +266,6 @@ qsev_guest_class_init(ObjectClass *oc, void *data)
>              "guest owners session parameters (encoded with base64)", NULL);
>  }
>
> -static void
> -qsev_guest_set_handle(Object *obj, Visitor *v, const char *name,
> -                      void *opaque, Error **errp)
> -{
> -    QSevGuestInfo *sev = QSEV_GUEST_INFO(obj);
> -    uint32_t value;
> -
> -    visit_type_uint32(v, name, &value, errp);
> -    sev->handle = value;
> -}
> -
> -static void
> -qsev_guest_set_policy(Object *obj, Visitor *v, const char *name,
> -                      void *opaque, Error **errp)
> -{
> -    QSevGuestInfo *sev = QSEV_GUEST_INFO(obj);
> -    uint32_t value;
> -
> -    visit_type_uint32(v, name, &value, errp);
> -    sev->policy = value;
> -}
> -
> -static void
> -qsev_guest_set_cbitpos(Object *obj, Visitor *v, const char *name,
> -                       void *opaque, Error **errp)
> -{
> -    QSevGuestInfo *sev = QSEV_GUEST_INFO(obj);
> -    uint32_t value;
> -
> -    visit_type_uint32(v, name, &value, errp);
> -    sev->cbitpos = value;
> -}
> -
> -static void
> -qsev_guest_set_reduced_phys_bits(Object *obj, Visitor *v, const char *name,
> -                                   void *opaque, Error **errp)
> -{
> -    QSevGuestInfo *sev = QSEV_GUEST_INFO(obj);
> -    uint32_t value;
> -
> -    visit_type_uint32(v, name, &value, errp);
> -    sev->reduced_phys_bits = value;
> -}
> -
> -static void
> -qsev_guest_get_policy(Object *obj, Visitor *v, const char *name,
> -                      void *opaque, Error **errp)
> -{
> -    uint32_t value;
> -    QSevGuestInfo *sev = QSEV_GUEST_INFO(obj);
> -
> -    value = sev->policy;
> -    visit_type_uint32(v, name, &value, errp);
> -}
> -
> -static void
> -qsev_guest_get_handle(Object *obj, Visitor *v, const char *name,
> -                      void *opaque, Error **errp)
> -{
> -    uint32_t value;
> -    QSevGuestInfo *sev = QSEV_GUEST_INFO(obj);
> -
> -    value = sev->handle;
> -    visit_type_uint32(v, name, &value, errp);
> -}
> -
> -static void
> -qsev_guest_get_cbitpos(Object *obj, Visitor *v, const char *name,
> -                       void *opaque, Error **errp)
> -{
> -    uint32_t value;
> -    QSevGuestInfo *sev = QSEV_GUEST_INFO(obj);
> -
> -    value = sev->cbitpos;
> -    visit_type_uint32(v, name, &value, errp);
> -}
> -
> -static void
> -qsev_guest_get_reduced_phys_bits(Object *obj, Visitor *v, const char *name,
> -                                   void *opaque, Error **errp)
> -{
> -    uint32_t value;
> -    QSevGuestInfo *sev = QSEV_GUEST_INFO(obj);
> -
> -    value = sev->reduced_phys_bits;
> -    visit_type_uint32(v, name, &value, errp);
> -}
> -
>  static void
>  qsev_guest_init(Object *obj)
>  {
> @@ -361,15 +273,15 @@ qsev_guest_init(Object *obj)
>
>      sev->sev_device = g_strdup(DEFAULT_SEV_DEVICE);
>      sev->policy = DEFAULT_GUEST_POLICY;
> -    object_property_add(obj, "policy", "uint32", qsev_guest_get_policy,
> -                        qsev_guest_set_policy, NULL, NULL, NULL);
> -    object_property_add(obj, "handle", "uint32", qsev_guest_get_handle,
> -                        qsev_guest_set_handle, NULL, NULL, NULL);
> -    object_property_add(obj, "cbitpos", "uint32", qsev_guest_get_cbitpos,
> -                        qsev_guest_set_cbitpos, NULL, NULL, NULL);
> -    object_property_add(obj, "reduced-phys-bits", "uint32",
> -                        qsev_guest_get_reduced_phys_bits,
> -                        qsev_guest_set_reduced_phys_bits, NULL, NULL, NULL);
> +    object_property_add_uint32_ptr(obj, "policy", &sev->policy,
> +                                   OBJ_PROP_FLAG_READWRITE, NULL);
> +    object_property_add_uint32_ptr(obj, "handle", &sev->handle,
> +                                   OBJ_PROP_FLAG_READWRITE, NULL);
> +    object_property_add_uint32_ptr(obj, "cbitpos", &sev->cbitpos,
> +                                   OBJ_PROP_FLAG_READWRITE, NULL);
> +    object_property_add_uint32_ptr(obj, "reduced-phys-bits",
> +                                   &sev->reduced_phys_bits,
> +                                   OBJ_PROP_FLAG_READWRITE, NULL);
>  }
>
>  /* sev guest info */
> --
> 2.20.1
>

On 30/11/2019 04:46, Felipe Franciosi wrote:
> Several objects implemented their own uint property getters and setters,
> despite them being straightforward (without any checks/validations on
> the values themselves) and identical across objects. This makes use of
> an enhanced API for object_property_add_uintXX_ptr() which offers
> default setters.
> 
> Some of these setters used to update the value even if the type visit
> failed (eg. because the value being set overflowed over the given type).
> The new setter introduces a check for these errors, not updating the
> value if an error occurred. The error is propagated.
> 
> Signed-off-by: Felipe Franciosi <felipe@nutanix.com>
> ---
>  hw/acpi/ich9.c       |  95 ++++----------------------------------
>  hw/isa/lpc_ich9.c    |  12 +----
>  hw/misc/edu.c        |  13 ++----
>  hw/pci-host/q35.c    |  14 ++----
>  hw/ppc/spapr.c       |  18 ++------
>  hw/vfio/pci-quirks.c |  20 +++-----
>  memory.c             |  15 +-----
>  target/arm/cpu.c     |  22 ++-------
>  target/i386/sev.c    | 106 ++++---------------------------------------
>  9 files changed, 40 insertions(+), 275 deletions(-)
> 
> diff --git a/hw/acpi/ich9.c b/hw/acpi/ich9.c
> index 742fb78226..d9305be891 100644
> --- a/hw/acpi/ich9.c
> +++ b/hw/acpi/ich9.c
> @@ -357,81 +357,6 @@ static void ich9_pm_set_cpu_hotplug_legacy(Object *obj, bool value,
>      s->pm.cpu_hotplug_legacy = value;
>  }
>  
> -static void ich9_pm_get_disable_s3(Object *obj, Visitor *v, const char *name,
> -                                   void *opaque, Error **errp)
> -{
> -    ICH9LPCPMRegs *pm = opaque;
> -    uint8_t value = pm->disable_s3;
> -
> -    visit_type_uint8(v, name, &value, errp);
> -}
> -
> -static void ich9_pm_set_disable_s3(Object *obj, Visitor *v, const char *name,
> -                                   void *opaque, Error **errp)
> -{
> -    ICH9LPCPMRegs *pm = opaque;
> -    Error *local_err = NULL;
> -    uint8_t value;
> -
> -    visit_type_uint8(v, name, &value, &local_err);
> -    if (local_err) {
> -        goto out;
> -    }
> -    pm->disable_s3 = value;
> -out:
> -    error_propagate(errp, local_err);
> -}
> -
> -static void ich9_pm_get_disable_s4(Object *obj, Visitor *v, const char *name,
> -                                   void *opaque, Error **errp)
> -{
> -    ICH9LPCPMRegs *pm = opaque;
> -    uint8_t value = pm->disable_s4;
> -
> -    visit_type_uint8(v, name, &value, errp);
> -}
> -
> -static void ich9_pm_set_disable_s4(Object *obj, Visitor *v, const char *name,
> -                                   void *opaque, Error **errp)
> -{
> -    ICH9LPCPMRegs *pm = opaque;
> -    Error *local_err = NULL;
> -    uint8_t value;
> -
> -    visit_type_uint8(v, name, &value, &local_err);
> -    if (local_err) {
> -        goto out;
> -    }
> -    pm->disable_s4 = value;
> -out:
> -    error_propagate(errp, local_err);
> -}
> -
> -static void ich9_pm_get_s4_val(Object *obj, Visitor *v, const char *name,
> -                               void *opaque, Error **errp)
> -{
> -    ICH9LPCPMRegs *pm = opaque;
> -    uint8_t value = pm->s4_val;
> -
> -    visit_type_uint8(v, name, &value, errp);
> -}
> -
> -static void ich9_pm_set_s4_val(Object *obj, Visitor *v, const char *name,
> -                               void *opaque, Error **errp)
> -{
> -    ICH9LPCPMRegs *pm = opaque;
> -    Error *local_err = NULL;
> -    uint8_t value;
> -
> -    visit_type_uint8(v, name, &value, &local_err);
> -    if (local_err) {
> -        goto out;
> -    }
> -    pm->s4_val = value;
> -out:
> -    error_propagate(errp, local_err);
> -}
> -
>  static bool ich9_pm_get_enable_tco(Object *obj, Error **errp)
>  {
>      ICH9LPCState *s = ICH9_LPC_DEVICE(obj);
> @@ -468,18 +393,14 @@ void ich9_pm_add_properties(Object *obj, ICH9LPCPMRegs *pm, Error **errp)
>                               ich9_pm_get_cpu_hotplug_legacy,
>                               ich9_pm_set_cpu_hotplug_legacy,
>                               NULL);
> -    object_property_add(obj, ACPI_PM_PROP_S3_DISABLED, "uint8",
> -                        ich9_pm_get_disable_s3,
> -                        ich9_pm_set_disable_s3,
> -                        NULL, pm, NULL);
> -    object_property_add(obj, ACPI_PM_PROP_S4_DISABLED, "uint8",
> -                        ich9_pm_get_disable_s4,
> -                        ich9_pm_set_disable_s4,
> -                        NULL, pm, NULL);
> -    object_property_add(obj, ACPI_PM_PROP_S4_VAL, "uint8",
> -                        ich9_pm_get_s4_val,
> -                        ich9_pm_set_s4_val,
> -                        NULL, pm, NULL);
> +    object_property_add_uint8_ptr(obj, ACPI_PM_PROP_S3_DISABLED,
> +                                  &pm->disable_s3, OBJ_PROP_FLAG_READWRITE,
> +                                  NULL);
> +    object_property_add_uint8_ptr(obj, ACPI_PM_PROP_S4_DISABLED,
> +                                  &pm->disable_s4, OBJ_PROP_FLAG_READWRITE,
> +                                  NULL);
> +    object_property_add_uint8_ptr(obj, ACPI_PM_PROP_S4_VAL,
> +                                  &pm->s4_val, OBJ_PROP_FLAG_READWRITE, NULL);
>      object_property_add_bool(obj, ACPI_PM_PROP_TCO_ENABLED,
>                               ich9_pm_get_enable_tco,
>                               ich9_pm_set_enable_tco,
> diff --git a/hw/isa/lpc_ich9.c b/hw/isa/lpc_ich9.c
> index c40bb3c420..b99a613954 100644
> --- a/hw/isa/lpc_ich9.c
> +++ b/hw/isa/lpc_ich9.c
> @@ -627,13 +627,6 @@ static const MemoryRegionOps ich9_rst_cnt_ops = {
>      .endianness = DEVICE_LITTLE_ENDIAN
>  };
>  
> -static void ich9_lpc_get_sci_int(Object *obj, Visitor *v, const char *name,
> -                                 void *opaque, Error **errp)
> -{
> -    ICH9LPCState *lpc = ICH9_LPC_DEVICE(obj);
> -    visit_type_uint8(v, name, &lpc->sci_gsi, errp);
> -}
> -
>  static void ich9_lpc_initfn(Object *obj)
>  {
>      ICH9LPCState *lpc = ICH9_LPC_DEVICE(obj);
> @@ -641,9 +634,8 @@ static void ich9_lpc_initfn(Object *obj)
>      static const uint8_t acpi_enable_cmd = ICH9_APM_ACPI_ENABLE;
>      static const uint8_t acpi_disable_cmd = ICH9_APM_ACPI_DISABLE;
>  
> -    object_property_add(obj, ACPI_PM_PROP_SCI_INT, "uint8",
> -                        ich9_lpc_get_sci_int,
> -                        NULL, NULL, NULL, NULL);
> +    object_property_add_uint8_ptr(obj, ACPI_PM_PROP_SCI_INT,
> +                                  &lpc->sci_gsi, OBJ_PROP_FLAG_READ, NULL);
>      object_property_add_uint8_ptr(OBJECT(lpc), ACPI_PM_PROP_ACPI_ENABLE_CMD,
>                                    &acpi_enable_cmd, OBJ_PROP_FLAG_READ, NULL);
>      object_property_add_uint8_ptr(OBJECT(lpc), ACPI_PM_PROP_ACPI_DISABLE_CMD,
> diff --git a/hw/misc/edu.c b/hw/misc/edu.c
> index d5e2bdbb57..ff10f5b794 100644
> --- a/hw/misc/edu.c
> +++ b/hw/misc/edu.c
> @@ -396,21 +396,14 @@ static void pci_edu_uninit(PCIDevice *pdev)
>      msi_uninit(pdev);
>  }
>  
> -static void edu_obj_uint64(Object *obj, Visitor *v, const char *name,
> -                           void *opaque, Error **errp)
> -{
> -    uint64_t *val = opaque;
> -
> -    visit_type_uint64(v, name, val, errp);
> -}
> -
>  static void edu_instance_init(Object *obj)
>  {
>      EduState *edu = EDU(obj);
>  
>      edu->dma_mask = (1UL << 28) - 1;
> -    object_property_add(obj, "dma_mask", "uint64", edu_obj_uint64,
> -                    edu_obj_uint64, NULL, &edu->dma_mask, NULL);
> +    object_property_add_uint64_ptr(obj, "dma_mask",
> +                                   &edu->dma_mask, OBJ_PROP_FLAG_READWRITE,
> +                                   NULL);
>  }
>  
>  static void edu_class_init(ObjectClass *class, void *data)
> diff --git a/hw/pci-host/q35.c b/hw/pci-host/q35.c
> index 158d270b9f..f384ab95c6 100644
> --- a/hw/pci-host/q35.c
> +++ b/hw/pci-host/q35.c
> @@ -165,14 +165,6 @@ static void q35_host_get_pci_hole64_end(Object *obj, Visitor *v,
>      visit_type_uint64(v, name, &value, errp);
>  }
>  
> -static void q35_host_get_mmcfg_size(Object *obj, Visitor *v, const char *name,
> -                                    void *opaque, Error **errp)
> -{
> -    PCIExpressHost *e = PCIE_HOST_BRIDGE(obj);
> -
> -    visit_type_uint64(v, name, &e->size, errp);
> -}
> -
>  /*
>   * NOTE: setting defaults for the mch.* fields in this table
>   * doesn't work, because mch is a separate QOM object that is
> @@ -213,6 +205,7 @@ static void q35_host_initfn(Object *obj)
>  {
>      Q35PCIHost *s = Q35_HOST_DEVICE(obj);
>      PCIHostState *phb = PCI_HOST_BRIDGE(obj);
> +    PCIExpressHost *pehb = PCIE_HOST_BRIDGE(obj);
>  
>      memory_region_init_io(&phb->conf_mem, obj, &pci_host_conf_le_ops, phb,
>                            "pci-conf-idx", 4);
> @@ -242,9 +235,8 @@ static void q35_host_initfn(Object *obj)
>                          q35_host_get_pci_hole64_end,
>                          NULL, NULL, NULL, NULL);
>  
> -    object_property_add(obj, PCIE_HOST_MCFG_SIZE, "uint64",
> -                        q35_host_get_mmcfg_size,
> -                        NULL, NULL, NULL, NULL);
> +    object_property_add_uint64_ptr(obj, PCIE_HOST_MCFG_SIZE,
> +                                   &pehb->size, OBJ_PROP_FLAG_READ, NULL);
>  
>      object_property_add_link(obj, MCH_HOST_PROP_RAM_MEM, TYPE_MEMORY_REGION,
>                               (Object **) &s->mch.ram_memory,
> diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
> index e076f6023c..668f045023 100644
> --- a/hw/ppc/spapr.c
> +++ b/hw/ppc/spapr.c
> @@ -3227,18 +3227,6 @@ static void spapr_set_resize_hpt(Object *obj, const char *value, Error **errp)
>      }
>  }
>  
> -static void spapr_get_vsmt(Object *obj, Visitor *v, const char *name,
> -                                   void *opaque, Error **errp)
> -{
> -    visit_type_uint32(v, name, (uint32_t *)opaque, errp);
> -}
> -
> -static void spapr_set_vsmt(Object *obj, Visitor *v, const char *name,
> -                                   void *opaque, Error **errp)
> -{
> -    visit_type_uint32(v, name, (uint32_t *)opaque, errp);
> -}
> -
>  static char *spapr_get_ic_mode(Object *obj, Error **errp)
>  {
>      SpaprMachineState *spapr = SPAPR_MACHINE(obj);
> @@ -3336,8 +3324,10 @@ static void spapr_instance_init(Object *obj)
>      object_property_set_description(obj, "resize-hpt",
>                                      "Resizing of the Hash Page Table (enabled, disabled, required)",
>                                      NULL);
> -    object_property_add(obj, "vsmt", "uint32", spapr_get_vsmt,
> -                        spapr_set_vsmt, NULL, &spapr->vsmt, &error_abort);
> +    object_property_add_uint32_ptr(obj, "vsmt",
> +                                   &spapr->vsmt, OBJ_PROP_FLAG_READWRITE,
> +                                   &error_abort);


Ths looks alright but...


> +
>      object_property_set_description(obj, "vsmt",
>                                      "Virtual SMT: KVM behaves as if this were"
>                                      " the host's SMT mode", &error_abort);
> diff --git a/hw/vfio/pci-quirks.c b/hw/vfio/pci-quirks.c
> index 136f3a9ad6..d769c99bde 100644
> --- a/hw/vfio/pci-quirks.c
> +++ b/hw/vfio/pci-quirks.c
> @@ -2187,14 +2187,6 @@ int vfio_add_virt_caps(VFIOPCIDevice *vdev, Error **errp)
>      return 0;
>  }
>  
> -static void vfio_pci_nvlink2_get_tgt(Object *obj, Visitor *v,
> -                                     const char *name,
> -                                     void *opaque, Error **errp)
> -{
> -    uint64_t tgt = (uintptr_t) opaque;
> -    visit_type_uint64(v, name, &tgt, errp);
> -}
> -
>  static void vfio_pci_nvlink2_get_link_speed(Object *obj, Visitor *v,
>                                                   const char *name,
>                                                   void *opaque, Error **errp)
> @@ -2240,9 +2232,9 @@ int vfio_pci_nvidia_v100_ram_init(VFIOPCIDevice *vdev, Error **errp)
>                                 nv2reg->size, p);
>      QLIST_INSERT_HEAD(&vdev->bars[0].quirks, quirk, next);
>  
> -    object_property_add(OBJECT(vdev), "nvlink2-tgt", "uint64",
> -                        vfio_pci_nvlink2_get_tgt, NULL, NULL,
> -                        (void *) (uintptr_t) cap->tgt, NULL);
> +    object_property_add_uint64_ptr(OBJECT(vdev), "nvlink2-tgt",
> +                                   (void *)(uintptr_t)cap->tgt,


... this does not seem equalent. The getter will assume cap->tgt is an
userspace address which it is not. &cap->tgt would be QOM-correct but
won't work because of the lifetime of @cap but this is another story.

btw what is this patchset based on? I tried applying it on top of 3 week
old and today upstream and it failed. Thanks,





> +                                   OBJ_PROP_FLAG_READ, NULL);
>      trace_vfio_pci_nvidia_gpu_setup_quirk(vdev->vbasedev.name, cap->tgt,
>                                            nv2reg->size);
>  free_exit:
> @@ -2301,9 +2293,9 @@ int vfio_pci_nvlink2_init(VFIOPCIDevice *vdev, Error **errp)
>          QLIST_INSERT_HEAD(&vdev->bars[0].quirks, quirk, next);
>      }
>  
> -    object_property_add(OBJECT(vdev), "nvlink2-tgt", "uint64",
> -                        vfio_pci_nvlink2_get_tgt, NULL, NULL,
> -                        (void *) (uintptr_t) captgt->tgt, NULL);
> +    object_property_add_uint64_ptr(OBJECT(vdev), "nvlink2-tgt",
> +                                   (void *)(uintptr_t)captgt->tgt,
> +                                   OBJ_PROP_FLAG_READ, NULL);
>      trace_vfio_pci_nvlink2_setup_quirk_ssatgt(vdev->vbasedev.name, captgt->tgt,
>                                                atsdreg->size);
>  
> diff --git a/memory.c b/memory.c
> index 06484c2bff..7dac2aa059 100644
> --- a/memory.c
> +++ b/memory.c
> @@ -1158,15 +1158,6 @@ void memory_region_init(MemoryRegion *mr,
>      memory_region_do_init(mr, owner, name, size);
>  }
>  
> -static void memory_region_get_addr(Object *obj, Visitor *v, const char *name,
> -                                   void *opaque, Error **errp)
> -{
> -    MemoryRegion *mr = MEMORY_REGION(obj);
> -    uint64_t value = mr->addr;
> -
> -    visit_type_uint64(v, name, &value, errp);
> -}
> -
>  static void memory_region_get_container(Object *obj, Visitor *v,
>                                          const char *name, void *opaque,
>                                          Error **errp)
> @@ -1230,10 +1221,8 @@ static void memory_region_initfn(Object *obj)
>                               NULL, NULL, &error_abort);
>      op->resolve = memory_region_resolve_container;
>  
> -    object_property_add(OBJECT(mr), "addr", "uint64",
> -                        memory_region_get_addr,
> -                        NULL, /* memory_region_set_addr */
> -                        NULL, NULL, &error_abort);
> +    object_property_add_uint64_ptr(OBJECT(mr), "addr",
> +                                   &mr->addr, OBJ_PROP_FLAG_READ, &error_abort);
>      object_property_add(OBJECT(mr), "priority", "uint32",
>                          memory_region_get_priority,
>                          NULL, /* memory_region_set_priority */
> diff --git a/target/arm/cpu.c b/target/arm/cpu.c
> index 7a4ac9339b..bbe25a73c4 100644
> --- a/target/arm/cpu.c
> +++ b/target/arm/cpu.c
> @@ -1039,22 +1039,6 @@ static void arm_set_pmu(Object *obj, bool value, Error **errp)
>      cpu->has_pmu = value;
>  }
>  
> -static void arm_get_init_svtor(Object *obj, Visitor *v, const char *name,
> -                               void *opaque, Error **errp)
> -{
> -    ARMCPU *cpu = ARM_CPU(obj);
> -
> -    visit_type_uint32(v, name, &cpu->init_svtor, errp);
> -}
> -
> -static void arm_set_init_svtor(Object *obj, Visitor *v, const char *name,
> -                               void *opaque, Error **errp)
> -{
> -    ARMCPU *cpu = ARM_CPU(obj);
> -
> -    visit_type_uint32(v, name, &cpu->init_svtor, errp);
> -}
> -
>  void arm_cpu_post_init(Object *obj)
>  {
>      ARMCPU *cpu = ARM_CPU(obj);
> @@ -1165,9 +1149,9 @@ void arm_cpu_post_init(Object *obj)
>           * a simple DEFINE_PROP_UINT32 for this because we want to permit
>           * the property to be set after realize.
>           */
> -        object_property_add(obj, "init-svtor", "uint32",
> -                            arm_get_init_svtor, arm_set_init_svtor,
> -                            NULL, NULL, &error_abort);
> +        object_property_add_uint32_ptr(obj, "init-svtor",
> +                                       &cpu->init_svtor,
> +                                       OBJ_PROP_FLAG_READWRITE, &error_abort);
>      }
>  
>      qdev_property_add_static(DEVICE(obj), &arm_cpu_cfgend_property,
> diff --git a/target/i386/sev.c b/target/i386/sev.c
> index 024bb24e51..846018a12d 100644
> --- a/target/i386/sev.c
> +++ b/target/i386/sev.c
> @@ -266,94 +266,6 @@ qsev_guest_class_init(ObjectClass *oc, void *data)
>              "guest owners session parameters (encoded with base64)", NULL);
>  }
>  
> -static void
> -qsev_guest_set_handle(Object *obj, Visitor *v, const char *name,
> -                      void *opaque, Error **errp)
> -{
> -    QSevGuestInfo *sev = QSEV_GUEST_INFO(obj);
> -    uint32_t value;
> -
> -    visit_type_uint32(v, name, &value, errp);
> -    sev->handle = value;
> -}
> -
> -static void
> -qsev_guest_set_policy(Object *obj, Visitor *v, const char *name,
> -                      void *opaque, Error **errp)
> -{
> -    QSevGuestInfo *sev = QSEV_GUEST_INFO(obj);
> -    uint32_t value;
> -
> -    visit_type_uint32(v, name, &value, errp);
> -    sev->policy = value;
> -}
> -
> -static void
> -qsev_guest_set_cbitpos(Object *obj, Visitor *v, const char *name,
> -                       void *opaque, Error **errp)
> -{
> -    QSevGuestInfo *sev = QSEV_GUEST_INFO(obj);
> -    uint32_t value;
> -
> -    visit_type_uint32(v, name, &value, errp);
> -    sev->cbitpos = value;
> -}
> -
> -static void
> -qsev_guest_set_reduced_phys_bits(Object *obj, Visitor *v, const char *name,
> -                                   void *opaque, Error **errp)
> -{
> -    QSevGuestInfo *sev = QSEV_GUEST_INFO(obj);
> -    uint32_t value;
> -
> -    visit_type_uint32(v, name, &value, errp);
> -    sev->reduced_phys_bits = value;
> -}
> -
> -static void
> -qsev_guest_get_policy(Object *obj, Visitor *v, const char *name,
> -                      void *opaque, Error **errp)
> -{
> -    uint32_t value;
> -    QSevGuestInfo *sev = QSEV_GUEST_INFO(obj);
> -
> -    value = sev->policy;
> -    visit_type_uint32(v, name, &value, errp);
> -}
> -
> -static void
> -qsev_guest_get_handle(Object *obj, Visitor *v, const char *name,
> -                      void *opaque, Error **errp)
> -{
> -    uint32_t value;
> -    QSevGuestInfo *sev = QSEV_GUEST_INFO(obj);
> -
> -    value = sev->handle;
> -    visit_type_uint32(v, name, &value, errp);
> -}
> -
> -static void
> -qsev_guest_get_cbitpos(Object *obj, Visitor *v, const char *name,
> -                       void *opaque, Error **errp)
> -{
> -    uint32_t value;
> -    QSevGuestInfo *sev = QSEV_GUEST_INFO(obj);
> -
> -    value = sev->cbitpos;
> -    visit_type_uint32(v, name, &value, errp);
> -}
> -
> -static void
> -qsev_guest_get_reduced_phys_bits(Object *obj, Visitor *v, const char *name,
> -                                   void *opaque, Error **errp)
> -{
> -    uint32_t value;
> -    QSevGuestInfo *sev = QSEV_GUEST_INFO(obj);
> -
> -    value = sev->reduced_phys_bits;
> -    visit_type_uint32(v, name, &value, errp);
> -}
> -
>  static void
>  qsev_guest_init(Object *obj)
>  {
> @@ -361,15 +273,15 @@ qsev_guest_init(Object *obj)
>  
>      sev->sev_device = g_strdup(DEFAULT_SEV_DEVICE);
>      sev->policy = DEFAULT_GUEST_POLICY;
> -    object_property_add(obj, "policy", "uint32", qsev_guest_get_policy,
> -                        qsev_guest_set_policy, NULL, NULL, NULL);
> -    object_property_add(obj, "handle", "uint32", qsev_guest_get_handle,
> -                        qsev_guest_set_handle, NULL, NULL, NULL);
> -    object_property_add(obj, "cbitpos", "uint32", qsev_guest_get_cbitpos,
> -                        qsev_guest_set_cbitpos, NULL, NULL, NULL);
> -    object_property_add(obj, "reduced-phys-bits", "uint32",
> -                        qsev_guest_get_reduced_phys_bits,
> -                        qsev_guest_set_reduced_phys_bits, NULL, NULL, NULL);
> +    object_property_add_uint32_ptr(obj, "policy", &sev->policy,
> +                                   OBJ_PROP_FLAG_READWRITE, NULL);
> +    object_property_add_uint32_ptr(obj, "handle", &sev->handle,
> +                                   OBJ_PROP_FLAG_READWRITE, NULL);
> +    object_property_add_uint32_ptr(obj, "cbitpos", &sev->cbitpos,
> +                                   OBJ_PROP_FLAG_READWRITE, NULL);
> +    object_property_add_uint32_ptr(obj, "reduced-phys-bits",
> +                                   &sev->reduced_phys_bits,
> +                                   OBJ_PROP_FLAG_READWRITE, NULL);
>  }
>  
>  /* sev guest info */
>

Hi

> On Dec 2, 2019, at 6:31 AM, Alexey Kardashevskiy <aik@ozlabs.ru> wrote:
> 
> 
> 
> On 30/11/2019 04:46, Felipe Franciosi wrote:
>> Several objects implemented their own uint property getters and setters,
>> despite them being straightforward (without any checks/validations on
>> the values themselves) and identical across objects. This makes use of
>> an enhanced API for object_property_add_uintXX_ptr() which offers
>> default setters.
>> 
>> Some of these setters used to update the value even if the type visit
>> failed (eg. because the value being set overflowed over the given type).
>> The new setter introduces a check for these errors, not updating the
>> value if an error occurred. The error is propagated.
>> 
>> Signed-off-by: Felipe Franciosi <felipe@nutanix.com>
>> ---
>> hw/acpi/ich9.c       |  95 ++++----------------------------------
>> hw/isa/lpc_ich9.c    |  12 +----
>> hw/misc/edu.c        |  13 ++----
>> hw/pci-host/q35.c    |  14 ++----
>> hw/ppc/spapr.c       |  18 ++------
>> hw/vfio/pci-quirks.c |  20 +++-----
>> memory.c             |  15 +-----
>> target/arm/cpu.c     |  22 ++-------
>> target/i386/sev.c    | 106 ++++---------------------------------------
>> 9 files changed, 40 insertions(+), 275 deletions(-)
>> 
>> diff --git a/hw/acpi/ich9.c b/hw/acpi/ich9.c
>> index 742fb78226..d9305be891 100644
>> --- a/hw/acpi/ich9.c
>> +++ b/hw/acpi/ich9.c
>> @@ -357,81 +357,6 @@ static void ich9_pm_set_cpu_hotplug_legacy(Object *obj, bool value,
>>     s->pm.cpu_hotplug_legacy = value;
>> }
>> 
>> -static void ich9_pm_get_disable_s3(Object *obj, Visitor *v, const char *name,
>> -                                   void *opaque, Error **errp)
>> -{
>> -    ICH9LPCPMRegs *pm = opaque;
>> -    uint8_t value = pm->disable_s3;
>> -
>> -    visit_type_uint8(v, name, &value, errp);
>> -}
>> -
>> -static void ich9_pm_set_disable_s3(Object *obj, Visitor *v, const char *name,
>> -                                   void *opaque, Error **errp)
>> -{
>> -    ICH9LPCPMRegs *pm = opaque;
>> -    Error *local_err = NULL;
>> -    uint8_t value;
>> -
>> -    visit_type_uint8(v, name, &value, &local_err);
>> -    if (local_err) {
>> -        goto out;
>> -    }
>> -    pm->disable_s3 = value;
>> -out:
>> -    error_propagate(errp, local_err);
>> -}
>> -
>> -static void ich9_pm_get_disable_s4(Object *obj, Visitor *v, const char *name,
>> -                                   void *opaque, Error **errp)
>> -{
>> -    ICH9LPCPMRegs *pm = opaque;
>> -    uint8_t value = pm->disable_s4;
>> -
>> -    visit_type_uint8(v, name, &value, errp);
>> -}
>> -
>> -static void ich9_pm_set_disable_s4(Object *obj, Visitor *v, const char *name,
>> -                                   void *opaque, Error **errp)
>> -{
>> -    ICH9LPCPMRegs *pm = opaque;
>> -    Error *local_err = NULL;
>> -    uint8_t value;
>> -
>> -    visit_type_uint8(v, name, &value, &local_err);
>> -    if (local_err) {
>> -        goto out;
>> -    }
>> -    pm->disable_s4 = value;
>> -out:
>> -    error_propagate(errp, local_err);
>> -}
>> -
>> -static void ich9_pm_get_s4_val(Object *obj, Visitor *v, const char *name,
>> -                               void *opaque, Error **errp)
>> -{
>> -    ICH9LPCPMRegs *pm = opaque;
>> -    uint8_t value = pm->s4_val;
>> -
>> -    visit_type_uint8(v, name, &value, errp);
>> -}
>> -
>> -static void ich9_pm_set_s4_val(Object *obj, Visitor *v, const char *name,
>> -                               void *opaque, Error **errp)
>> -{
>> -    ICH9LPCPMRegs *pm = opaque;
>> -    Error *local_err = NULL;
>> -    uint8_t value;
>> -
>> -    visit_type_uint8(v, name, &value, &local_err);
>> -    if (local_err) {
>> -        goto out;
>> -    }
>> -    pm->s4_val = value;
>> -out:
>> -    error_propagate(errp, local_err);
>> -}
>> -
>> static bool ich9_pm_get_enable_tco(Object *obj, Error **errp)
>> {
>>     ICH9LPCState *s = ICH9_LPC_DEVICE(obj);
>> @@ -468,18 +393,14 @@ void ich9_pm_add_properties(Object *obj, ICH9LPCPMRegs *pm, Error **errp)
>>                              ich9_pm_get_cpu_hotplug_legacy,
>>                              ich9_pm_set_cpu_hotplug_legacy,
>>                              NULL);
>> -    object_property_add(obj, ACPI_PM_PROP_S3_DISABLED, "uint8",
>> -                        ich9_pm_get_disable_s3,
>> -                        ich9_pm_set_disable_s3,
>> -                        NULL, pm, NULL);
>> -    object_property_add(obj, ACPI_PM_PROP_S4_DISABLED, "uint8",
>> -                        ich9_pm_get_disable_s4,
>> -                        ich9_pm_set_disable_s4,
>> -                        NULL, pm, NULL);
>> -    object_property_add(obj, ACPI_PM_PROP_S4_VAL, "uint8",
>> -                        ich9_pm_get_s4_val,
>> -                        ich9_pm_set_s4_val,
>> -                        NULL, pm, NULL);
>> +    object_property_add_uint8_ptr(obj, ACPI_PM_PROP_S3_DISABLED,
>> +                                  &pm->disable_s3, OBJ_PROP_FLAG_READWRITE,
>> +                                  NULL);
>> +    object_property_add_uint8_ptr(obj, ACPI_PM_PROP_S4_DISABLED,
>> +                                  &pm->disable_s4, OBJ_PROP_FLAG_READWRITE,
>> +                                  NULL);
>> +    object_property_add_uint8_ptr(obj, ACPI_PM_PROP_S4_VAL,
>> +                                  &pm->s4_val, OBJ_PROP_FLAG_READWRITE, NULL);
>>     object_property_add_bool(obj, ACPI_PM_PROP_TCO_ENABLED,
>>                              ich9_pm_get_enable_tco,
>>                              ich9_pm_set_enable_tco,
>> diff --git a/hw/isa/lpc_ich9.c b/hw/isa/lpc_ich9.c
>> index c40bb3c420..b99a613954 100644
>> --- a/hw/isa/lpc_ich9.c
>> +++ b/hw/isa/lpc_ich9.c
>> @@ -627,13 +627,6 @@ static const MemoryRegionOps ich9_rst_cnt_ops = {
>>     .endianness = DEVICE_LITTLE_ENDIAN
>> };
>> 
>> -static void ich9_lpc_get_sci_int(Object *obj, Visitor *v, const char *name,
>> -                                 void *opaque, Error **errp)
>> -{
>> -    ICH9LPCState *lpc = ICH9_LPC_DEVICE(obj);
>> -    visit_type_uint8(v, name, &lpc->sci_gsi, errp);
>> -}
>> -
>> static void ich9_lpc_initfn(Object *obj)
>> {
>>     ICH9LPCState *lpc = ICH9_LPC_DEVICE(obj);
>> @@ -641,9 +634,8 @@ static void ich9_lpc_initfn(Object *obj)
>>     static const uint8_t acpi_enable_cmd = ICH9_APM_ACPI_ENABLE;
>>     static const uint8_t acpi_disable_cmd = ICH9_APM_ACPI_DISABLE;
>> 
>> -    object_property_add(obj, ACPI_PM_PROP_SCI_INT, "uint8",
>> -                        ich9_lpc_get_sci_int,
>> -                        NULL, NULL, NULL, NULL);
>> +    object_property_add_uint8_ptr(obj, ACPI_PM_PROP_SCI_INT,
>> +                                  &lpc->sci_gsi, OBJ_PROP_FLAG_READ, NULL);
>>     object_property_add_uint8_ptr(OBJECT(lpc), ACPI_PM_PROP_ACPI_ENABLE_CMD,
>>                                   &acpi_enable_cmd, OBJ_PROP_FLAG_READ, NULL);
>>     object_property_add_uint8_ptr(OBJECT(lpc), ACPI_PM_PROP_ACPI_DISABLE_CMD,
>> diff --git a/hw/misc/edu.c b/hw/misc/edu.c
>> index d5e2bdbb57..ff10f5b794 100644
>> --- a/hw/misc/edu.c
>> +++ b/hw/misc/edu.c
>> @@ -396,21 +396,14 @@ static void pci_edu_uninit(PCIDevice *pdev)
>>     msi_uninit(pdev);
>> }
>> 
>> -static void edu_obj_uint64(Object *obj, Visitor *v, const char *name,
>> -                           void *opaque, Error **errp)
>> -{
>> -    uint64_t *val = opaque;
>> -
>> -    visit_type_uint64(v, name, val, errp);
>> -}
>> -
>> static void edu_instance_init(Object *obj)
>> {
>>     EduState *edu = EDU(obj);
>> 
>>     edu->dma_mask = (1UL << 28) - 1;
>> -    object_property_add(obj, "dma_mask", "uint64", edu_obj_uint64,
>> -                    edu_obj_uint64, NULL, &edu->dma_mask, NULL);
>> +    object_property_add_uint64_ptr(obj, "dma_mask",
>> +                                   &edu->dma_mask, OBJ_PROP_FLAG_READWRITE,
>> +                                   NULL);
>> }
>> 
>> static void edu_class_init(ObjectClass *class, void *data)
>> diff --git a/hw/pci-host/q35.c b/hw/pci-host/q35.c
>> index 158d270b9f..f384ab95c6 100644
>> --- a/hw/pci-host/q35.c
>> +++ b/hw/pci-host/q35.c
>> @@ -165,14 +165,6 @@ static void q35_host_get_pci_hole64_end(Object *obj, Visitor *v,
>>     visit_type_uint64(v, name, &value, errp);
>> }
>> 
>> -static void q35_host_get_mmcfg_size(Object *obj, Visitor *v, const char *name,
>> -                                    void *opaque, Error **errp)
>> -{
>> -    PCIExpressHost *e = PCIE_HOST_BRIDGE(obj);
>> -
>> -    visit_type_uint64(v, name, &e->size, errp);
>> -}
>> -
>> /*
>>  * NOTE: setting defaults for the mch.* fields in this table
>>  * doesn't work, because mch is a separate QOM object that is
>> @@ -213,6 +205,7 @@ static void q35_host_initfn(Object *obj)
>> {
>>     Q35PCIHost *s = Q35_HOST_DEVICE(obj);
>>     PCIHostState *phb = PCI_HOST_BRIDGE(obj);
>> +    PCIExpressHost *pehb = PCIE_HOST_BRIDGE(obj);
>> 
>>     memory_region_init_io(&phb->conf_mem, obj, &pci_host_conf_le_ops, phb,
>>                           "pci-conf-idx", 4);
>> @@ -242,9 +235,8 @@ static void q35_host_initfn(Object *obj)
>>                         q35_host_get_pci_hole64_end,
>>                         NULL, NULL, NULL, NULL);
>> 
>> -    object_property_add(obj, PCIE_HOST_MCFG_SIZE, "uint64",
>> -                        q35_host_get_mmcfg_size,
>> -                        NULL, NULL, NULL, NULL);
>> +    object_property_add_uint64_ptr(obj, PCIE_HOST_MCFG_SIZE,
>> +                                   &pehb->size, OBJ_PROP_FLAG_READ, NULL);
>> 
>>     object_property_add_link(obj, MCH_HOST_PROP_RAM_MEM, TYPE_MEMORY_REGION,
>>                              (Object **) &s->mch.ram_memory,
>> diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
>> index e076f6023c..668f045023 100644
>> --- a/hw/ppc/spapr.c
>> +++ b/hw/ppc/spapr.c
>> @@ -3227,18 +3227,6 @@ static void spapr_set_resize_hpt(Object *obj, const char *value, Error **errp)
>>     }
>> }
>> 
>> -static void spapr_get_vsmt(Object *obj, Visitor *v, const char *name,
>> -                                   void *opaque, Error **errp)
>> -{
>> -    visit_type_uint32(v, name, (uint32_t *)opaque, errp);
>> -}
>> -
>> -static void spapr_set_vsmt(Object *obj, Visitor *v, const char *name,
>> -                                   void *opaque, Error **errp)
>> -{
>> -    visit_type_uint32(v, name, (uint32_t *)opaque, errp);
>> -}
>> -
>> static char *spapr_get_ic_mode(Object *obj, Error **errp)
>> {
>>     SpaprMachineState *spapr = SPAPR_MACHINE(obj);
>> @@ -3336,8 +3324,10 @@ static void spapr_instance_init(Object *obj)
>>     object_property_set_description(obj, "resize-hpt",
>>                                     "Resizing of the Hash Page Table (enabled, disabled, required)",
>>                                     NULL);
>> -    object_property_add(obj, "vsmt", "uint32", spapr_get_vsmt,
>> -                        spapr_set_vsmt, NULL, &spapr->vsmt, &error_abort);
>> +    object_property_add_uint32_ptr(obj, "vsmt",
>> +                                   &spapr->vsmt, OBJ_PROP_FLAG_READWRITE,
>> +                                   &error_abort);
> 
> 
> Ths looks alright but...

Ok.

> 
> 
>> +
>>     object_property_set_description(obj, "vsmt",
>>                                     "Virtual SMT: KVM behaves as if this were"
>>                                     " the host's SMT mode", &error_abort);
>> diff --git a/hw/vfio/pci-quirks.c b/hw/vfio/pci-quirks.c
>> index 136f3a9ad6..d769c99bde 100644
>> --- a/hw/vfio/pci-quirks.c
>> +++ b/hw/vfio/pci-quirks.c
>> @@ -2187,14 +2187,6 @@ int vfio_add_virt_caps(VFIOPCIDevice *vdev, Error **errp)
>>     return 0;
>> }
>> 
>> -static void vfio_pci_nvlink2_get_tgt(Object *obj, Visitor *v,
>> -                                     const char *name,
>> -                                     void *opaque, Error **errp)
>> -{
>> -    uint64_t tgt = (uintptr_t) opaque;
>> -    visit_type_uint64(v, name, &tgt, errp);
>> -}
>> -
>> static void vfio_pci_nvlink2_get_link_speed(Object *obj, Visitor *v,
>>                                                  const char *name,
>>                                                  void *opaque, Error **errp)
>> @@ -2240,9 +2232,9 @@ int vfio_pci_nvidia_v100_ram_init(VFIOPCIDevice *vdev, Error **errp)
>>                                nv2reg->size, p);
>>     QLIST_INSERT_HEAD(&vdev->bars[0].quirks, quirk, next);
>> 
>> -    object_property_add(OBJECT(vdev), "nvlink2-tgt", "uint64",
>> -                        vfio_pci_nvlink2_get_tgt, NULL, NULL,
>> -                        (void *) (uintptr_t) cap->tgt, NULL);
>> +    object_property_add_uint64_ptr(OBJECT(vdev), "nvlink2-tgt",
>> +                                   (void *)(uintptr_t)cap->tgt,
> 
> 
> ... this does not seem equalent. The getter will assume cap->tgt is an
> userspace address which it is not. &cap->tgt would be QOM-correct but
> won't work because of the lifetime of @cap but this is another story.

Maybe I just don't understand where this value comes from. It sounds
like you know what you are talking about :) so I'll send a v4 and
leave this method untouched, unless you have a chance to test this and
tell me that it still works.

> 
> btw what is this patchset based on? I tried applying it on top of 3 week
> old and today upstream and it failed. Thanks,

I'm not sure why there were problems. I just rebased my branch on top
of latest master (without issues). I pushed it to Github so you can
have a look. Let me know if you want to try it out or if I should just
send a v4 straight away dropping the changes immediately above.

https://github.com/franciozzy/qemu

Thanks!
F.

> 
> 
> 
> 
> 
>> +                                   OBJ_PROP_FLAG_READ, NULL);
>>     trace_vfio_pci_nvidia_gpu_setup_quirk(vdev->vbasedev.name, cap->tgt,
>>                                           nv2reg->size);
>> free_exit:
>> @@ -2301,9 +2293,9 @@ int vfio_pci_nvlink2_init(VFIOPCIDevice *vdev, Error **errp)
>>         QLIST_INSERT_HEAD(&vdev->bars[0].quirks, quirk, next);
>>     }
>> 
>> -    object_property_add(OBJECT(vdev), "nvlink2-tgt", "uint64",
>> -                        vfio_pci_nvlink2_get_tgt, NULL, NULL,
>> -                        (void *) (uintptr_t) captgt->tgt, NULL);
>> +    object_property_add_uint64_ptr(OBJECT(vdev), "nvlink2-tgt",
>> +                                   (void *)(uintptr_t)captgt->tgt,
>> +                                   OBJ_PROP_FLAG_READ, NULL);
>>     trace_vfio_pci_nvlink2_setup_quirk_ssatgt(vdev->vbasedev.name, captgt->tgt,
>>                                               atsdreg->size);
>> 
>> diff --git a/memory.c b/memory.c
>> index 06484c2bff..7dac2aa059 100644
>> --- a/memory.c
>> +++ b/memory.c
>> @@ -1158,15 +1158,6 @@ void memory_region_init(MemoryRegion *mr,
>>     memory_region_do_init(mr, owner, name, size);
>> }
>> 
>> -static void memory_region_get_addr(Object *obj, Visitor *v, const char *name,
>> -                                   void *opaque, Error **errp)
>> -{
>> -    MemoryRegion *mr = MEMORY_REGION(obj);
>> -    uint64_t value = mr->addr;
>> -
>> -    visit_type_uint64(v, name, &value, errp);
>> -}
>> -
>> static void memory_region_get_container(Object *obj, Visitor *v,
>>                                         const char *name, void *opaque,
>>                                         Error **errp)
>> @@ -1230,10 +1221,8 @@ static void memory_region_initfn(Object *obj)
>>                              NULL, NULL, &error_abort);
>>     op->resolve = memory_region_resolve_container;
>> 
>> -    object_property_add(OBJECT(mr), "addr", "uint64",
>> -                        memory_region_get_addr,
>> -                        NULL, /* memory_region_set_addr */
>> -                        NULL, NULL, &error_abort);
>> +    object_property_add_uint64_ptr(OBJECT(mr), "addr",
>> +                                   &mr->addr, OBJ_PROP_FLAG_READ, &error_abort);
>>     object_property_add(OBJECT(mr), "priority", "uint32",
>>                         memory_region_get_priority,
>>                         NULL, /* memory_region_set_priority */
>> diff --git a/target/arm/cpu.c b/target/arm/cpu.c
>> index 7a4ac9339b..bbe25a73c4 100644
>> --- a/target/arm/cpu.c
>> +++ b/target/arm/cpu.c
>> @@ -1039,22 +1039,6 @@ static void arm_set_pmu(Object *obj, bool value, Error **errp)
>>     cpu->has_pmu = value;
>> }
>> 
>> -static void arm_get_init_svtor(Object *obj, Visitor *v, const char *name,
>> -                               void *opaque, Error **errp)
>> -{
>> -    ARMCPU *cpu = ARM_CPU(obj);
>> -
>> -    visit_type_uint32(v, name, &cpu->init_svtor, errp);
>> -}
>> -
>> -static void arm_set_init_svtor(Object *obj, Visitor *v, const char *name,
>> -                               void *opaque, Error **errp)
>> -{
>> -    ARMCPU *cpu = ARM_CPU(obj);
>> -
>> -    visit_type_uint32(v, name, &cpu->init_svtor, errp);
>> -}
>> -
>> void arm_cpu_post_init(Object *obj)
>> {
>>     ARMCPU *cpu = ARM_CPU(obj);
>> @@ -1165,9 +1149,9 @@ void arm_cpu_post_init(Object *obj)
>>          * a simple DEFINE_PROP_UINT32 for this because we want to permit
>>          * the property to be set after realize.
>>          */
>> -        object_property_add(obj, "init-svtor", "uint32",
>> -                            arm_get_init_svtor, arm_set_init_svtor,
>> -                            NULL, NULL, &error_abort);
>> +        object_property_add_uint32_ptr(obj, "init-svtor",
>> +                                       &cpu->init_svtor,
>> +                                       OBJ_PROP_FLAG_READWRITE, &error_abort);
>>     }
>> 
>>     qdev_property_add_static(DEVICE(obj), &arm_cpu_cfgend_property,
>> diff --git a/target/i386/sev.c b/target/i386/sev.c
>> index 024bb24e51..846018a12d 100644
>> --- a/target/i386/sev.c
>> +++ b/target/i386/sev.c
>> @@ -266,94 +266,6 @@ qsev_guest_class_init(ObjectClass *oc, void *data)
>>             "guest owners session parameters (encoded with base64)", NULL);
>> }
>> 
>> -static void
>> -qsev_guest_set_handle(Object *obj, Visitor *v, const char *name,
>> -                      void *opaque, Error **errp)
>> -{
>> -    QSevGuestInfo *sev = QSEV_GUEST_INFO(obj);
>> -    uint32_t value;
>> -
>> -    visit_type_uint32(v, name, &value, errp);
>> -    sev->handle = value;
>> -}
>> -
>> -static void
>> -qsev_guest_set_policy(Object *obj, Visitor *v, const char *name,
>> -                      void *opaque, Error **errp)
>> -{
>> -    QSevGuestInfo *sev = QSEV_GUEST_INFO(obj);
>> -    uint32_t value;
>> -
>> -    visit_type_uint32(v, name, &value, errp);
>> -    sev->policy = value;
>> -}
>> -
>> -static void
>> -qsev_guest_set_cbitpos(Object *obj, Visitor *v, const char *name,
>> -                       void *opaque, Error **errp)
>> -{
>> -    QSevGuestInfo *sev = QSEV_GUEST_INFO(obj);
>> -    uint32_t value;
>> -
>> -    visit_type_uint32(v, name, &value, errp);
>> -    sev->cbitpos = value;
>> -}
>> -
>> -static void
>> -qsev_guest_set_reduced_phys_bits(Object *obj, Visitor *v, const char *name,
>> -                                   void *opaque, Error **errp)
>> -{
>> -    QSevGuestInfo *sev = QSEV_GUEST_INFO(obj);
>> -    uint32_t value;
>> -
>> -    visit_type_uint32(v, name, &value, errp);
>> -    sev->reduced_phys_bits = value;
>> -}
>> -
>> -static void
>> -qsev_guest_get_policy(Object *obj, Visitor *v, const char *name,
>> -                      void *opaque, Error **errp)
>> -{
>> -    uint32_t value;
>> -    QSevGuestInfo *sev = QSEV_GUEST_INFO(obj);
>> -
>> -    value = sev->policy;
>> -    visit_type_uint32(v, name, &value, errp);
>> -}
>> -
>> -static void
>> -qsev_guest_get_handle(Object *obj, Visitor *v, const char *name,
>> -                      void *opaque, Error **errp)
>> -{
>> -    uint32_t value;
>> -    QSevGuestInfo *sev = QSEV_GUEST_INFO(obj);
>> -
>> -    value = sev->handle;
>> -    visit_type_uint32(v, name, &value, errp);
>> -}
>> -
>> -static void
>> -qsev_guest_get_cbitpos(Object *obj, Visitor *v, const char *name,
>> -                       void *opaque, Error **errp)
>> -{
>> -    uint32_t value;
>> -    QSevGuestInfo *sev = QSEV_GUEST_INFO(obj);
>> -
>> -    value = sev->cbitpos;
>> -    visit_type_uint32(v, name, &value, errp);
>> -}
>> -
>> -static void
>> -qsev_guest_get_reduced_phys_bits(Object *obj, Visitor *v, const char *name,
>> -                                   void *opaque, Error **errp)
>> -{
>> -    uint32_t value;
>> -    QSevGuestInfo *sev = QSEV_GUEST_INFO(obj);
>> -
>> -    value = sev->reduced_phys_bits;
>> -    visit_type_uint32(v, name, &value, errp);
>> -}
>> -
>> static void
>> qsev_guest_init(Object *obj)
>> {
>> @@ -361,15 +273,15 @@ qsev_guest_init(Object *obj)
>> 
>>     sev->sev_device = g_strdup(DEFAULT_SEV_DEVICE);
>>     sev->policy = DEFAULT_GUEST_POLICY;
>> -    object_property_add(obj, "policy", "uint32", qsev_guest_get_policy,
>> -                        qsev_guest_set_policy, NULL, NULL, NULL);
>> -    object_property_add(obj, "handle", "uint32", qsev_guest_get_handle,
>> -                        qsev_guest_set_handle, NULL, NULL, NULL);
>> -    object_property_add(obj, "cbitpos", "uint32", qsev_guest_get_cbitpos,
>> -                        qsev_guest_set_cbitpos, NULL, NULL, NULL);
>> -    object_property_add(obj, "reduced-phys-bits", "uint32",
>> -                        qsev_guest_get_reduced_phys_bits,
>> -                        qsev_guest_set_reduced_phys_bits, NULL, NULL, NULL);
>> +    object_property_add_uint32_ptr(obj, "policy", &sev->policy,
>> +                                   OBJ_PROP_FLAG_READWRITE, NULL);
>> +    object_property_add_uint32_ptr(obj, "handle", &sev->handle,
>> +                                   OBJ_PROP_FLAG_READWRITE, NULL);
>> +    object_property_add_uint32_ptr(obj, "cbitpos", &sev->cbitpos,
>> +                                   OBJ_PROP_FLAG_READWRITE, NULL);
>> +    object_property_add_uint32_ptr(obj, "reduced-phys-bits",
>> +                                   &sev->reduced_phys_bits,
>> +                                   OBJ_PROP_FLAG_READWRITE, NULL);
>> }
>> 
>> /* sev guest info */
>> 
> 
> -- 
> Alexey

On 10/12/2019 23:04, Felipe Franciosi wrote:
> Hi
> 
>> On Dec 2, 2019, at 6:31 AM, Alexey Kardashevskiy <aik@ozlabs.ru> wrote:
>>
>>
>>
>> On 30/11/2019 04:46, Felipe Franciosi wrote:
>>> Several objects implemented their own uint property getters and setters,
>>> despite them being straightforward (without any checks/validations on
>>> the values themselves) and identical across objects. This makes use of
>>> an enhanced API for object_property_add_uintXX_ptr() which offers
>>> default setters.
>>>
>>> Some of these setters used to update the value even if the type visit
>>> failed (eg. because the value being set overflowed over the given type).
>>> The new setter introduces a check for these errors, not updating the
>>> value if an error occurred. The error is propagated.
>>>
>>> Signed-off-by: Felipe Franciosi <felipe@nutanix.com>
>>> ---
>>> hw/acpi/ich9.c       |  95 ++++----------------------------------
>>> hw/isa/lpc_ich9.c    |  12 +----
>>> hw/misc/edu.c        |  13 ++----
>>> hw/pci-host/q35.c    |  14 ++----
>>> hw/ppc/spapr.c       |  18 ++------
>>> hw/vfio/pci-quirks.c |  20 +++-----
>>> memory.c             |  15 +-----
>>> target/arm/cpu.c     |  22 ++-------
>>> target/i386/sev.c    | 106 ++++---------------------------------------
>>> 9 files changed, 40 insertions(+), 275 deletions(-)
>>>
>>> diff --git a/hw/acpi/ich9.c b/hw/acpi/ich9.c
>>> index 742fb78226..d9305be891 100644
>>> --- a/hw/acpi/ich9.c
>>> +++ b/hw/acpi/ich9.c
>>> @@ -357,81 +357,6 @@ static void ich9_pm_set_cpu_hotplug_legacy(Object *obj, bool value,
>>>     s->pm.cpu_hotplug_legacy = value;
>>> }
>>>
>>> -static void ich9_pm_get_disable_s3(Object *obj, Visitor *v, const char *name,
>>> -                                   void *opaque, Error **errp)
>>> -{
>>> -    ICH9LPCPMRegs *pm = opaque;
>>> -    uint8_t value = pm->disable_s3;
>>> -
>>> -    visit_type_uint8(v, name, &value, errp);
>>> -}
>>> -
>>> -static void ich9_pm_set_disable_s3(Object *obj, Visitor *v, const char *name,
>>> -                                   void *opaque, Error **errp)
>>> -{
>>> -    ICH9LPCPMRegs *pm = opaque;
>>> -    Error *local_err = NULL;
>>> -    uint8_t value;
>>> -
>>> -    visit_type_uint8(v, name, &value, &local_err);
>>> -    if (local_err) {
>>> -        goto out;
>>> -    }
>>> -    pm->disable_s3 = value;
>>> -out:
>>> -    error_propagate(errp, local_err);
>>> -}
>>> -
>>> -static void ich9_pm_get_disable_s4(Object *obj, Visitor *v, const char *name,
>>> -                                   void *opaque, Error **errp)
>>> -{
>>> -    ICH9LPCPMRegs *pm = opaque;
>>> -    uint8_t value = pm->disable_s4;
>>> -
>>> -    visit_type_uint8(v, name, &value, errp);
>>> -}
>>> -
>>> -static void ich9_pm_set_disable_s4(Object *obj, Visitor *v, const char *name,
>>> -                                   void *opaque, Error **errp)
>>> -{
>>> -    ICH9LPCPMRegs *pm = opaque;
>>> -    Error *local_err = NULL;
>>> -    uint8_t value;
>>> -
>>> -    visit_type_uint8(v, name, &value, &local_err);
>>> -    if (local_err) {
>>> -        goto out;
>>> -    }
>>> -    pm->disable_s4 = value;
>>> -out:
>>> -    error_propagate(errp, local_err);
>>> -}
>>> -
>>> -static void ich9_pm_get_s4_val(Object *obj, Visitor *v, const char *name,
>>> -                               void *opaque, Error **errp)
>>> -{
>>> -    ICH9LPCPMRegs *pm = opaque;
>>> -    uint8_t value = pm->s4_val;
>>> -
>>> -    visit_type_uint8(v, name, &value, errp);
>>> -}
>>> -
>>> -static void ich9_pm_set_s4_val(Object *obj, Visitor *v, const char *name,
>>> -                               void *opaque, Error **errp)
>>> -{
>>> -    ICH9LPCPMRegs *pm = opaque;
>>> -    Error *local_err = NULL;
>>> -    uint8_t value;
>>> -
>>> -    visit_type_uint8(v, name, &value, &local_err);
>>> -    if (local_err) {
>>> -        goto out;
>>> -    }
>>> -    pm->s4_val = value;
>>> -out:
>>> -    error_propagate(errp, local_err);
>>> -}
>>> -
>>> static bool ich9_pm_get_enable_tco(Object *obj, Error **errp)
>>> {
>>>     ICH9LPCState *s = ICH9_LPC_DEVICE(obj);
>>> @@ -468,18 +393,14 @@ void ich9_pm_add_properties(Object *obj, ICH9LPCPMRegs *pm, Error **errp)
>>>                              ich9_pm_get_cpu_hotplug_legacy,
>>>                              ich9_pm_set_cpu_hotplug_legacy,
>>>                              NULL);
>>> -    object_property_add(obj, ACPI_PM_PROP_S3_DISABLED, "uint8",
>>> -                        ich9_pm_get_disable_s3,
>>> -                        ich9_pm_set_disable_s3,
>>> -                        NULL, pm, NULL);
>>> -    object_property_add(obj, ACPI_PM_PROP_S4_DISABLED, "uint8",
>>> -                        ich9_pm_get_disable_s4,
>>> -                        ich9_pm_set_disable_s4,
>>> -                        NULL, pm, NULL);
>>> -    object_property_add(obj, ACPI_PM_PROP_S4_VAL, "uint8",
>>> -                        ich9_pm_get_s4_val,
>>> -                        ich9_pm_set_s4_val,
>>> -                        NULL, pm, NULL);
>>> +    object_property_add_uint8_ptr(obj, ACPI_PM_PROP_S3_DISABLED,
>>> +                                  &pm->disable_s3, OBJ_PROP_FLAG_READWRITE,
>>> +                                  NULL);
>>> +    object_property_add_uint8_ptr(obj, ACPI_PM_PROP_S4_DISABLED,
>>> +                                  &pm->disable_s4, OBJ_PROP_FLAG_READWRITE,
>>> +                                  NULL);
>>> +    object_property_add_uint8_ptr(obj, ACPI_PM_PROP_S4_VAL,
>>> +                                  &pm->s4_val, OBJ_PROP_FLAG_READWRITE, NULL);
>>>     object_property_add_bool(obj, ACPI_PM_PROP_TCO_ENABLED,
>>>                              ich9_pm_get_enable_tco,
>>>                              ich9_pm_set_enable_tco,
>>> diff --git a/hw/isa/lpc_ich9.c b/hw/isa/lpc_ich9.c
>>> index c40bb3c420..b99a613954 100644
>>> --- a/hw/isa/lpc_ich9.c
>>> +++ b/hw/isa/lpc_ich9.c
>>> @@ -627,13 +627,6 @@ static const MemoryRegionOps ich9_rst_cnt_ops = {
>>>     .endianness = DEVICE_LITTLE_ENDIAN
>>> };
>>>
>>> -static void ich9_lpc_get_sci_int(Object *obj, Visitor *v, const char *name,
>>> -                                 void *opaque, Error **errp)
>>> -{
>>> -    ICH9LPCState *lpc = ICH9_LPC_DEVICE(obj);
>>> -    visit_type_uint8(v, name, &lpc->sci_gsi, errp);
>>> -}
>>> -
>>> static void ich9_lpc_initfn(Object *obj)
>>> {
>>>     ICH9LPCState *lpc = ICH9_LPC_DEVICE(obj);
>>> @@ -641,9 +634,8 @@ static void ich9_lpc_initfn(Object *obj)
>>>     static const uint8_t acpi_enable_cmd = ICH9_APM_ACPI_ENABLE;
>>>     static const uint8_t acpi_disable_cmd = ICH9_APM_ACPI_DISABLE;
>>>
>>> -    object_property_add(obj, ACPI_PM_PROP_SCI_INT, "uint8",
>>> -                        ich9_lpc_get_sci_int,
>>> -                        NULL, NULL, NULL, NULL);
>>> +    object_property_add_uint8_ptr(obj, ACPI_PM_PROP_SCI_INT,
>>> +                                  &lpc->sci_gsi, OBJ_PROP_FLAG_READ, NULL);
>>>     object_property_add_uint8_ptr(OBJECT(lpc), ACPI_PM_PROP_ACPI_ENABLE_CMD,
>>>                                   &acpi_enable_cmd, OBJ_PROP_FLAG_READ, NULL);
>>>     object_property_add_uint8_ptr(OBJECT(lpc), ACPI_PM_PROP_ACPI_DISABLE_CMD,
>>> diff --git a/hw/misc/edu.c b/hw/misc/edu.c
>>> index d5e2bdbb57..ff10f5b794 100644
>>> --- a/hw/misc/edu.c
>>> +++ b/hw/misc/edu.c
>>> @@ -396,21 +396,14 @@ static void pci_edu_uninit(PCIDevice *pdev)
>>>     msi_uninit(pdev);
>>> }
>>>
>>> -static void edu_obj_uint64(Object *obj, Visitor *v, const char *name,
>>> -                           void *opaque, Error **errp)
>>> -{
>>> -    uint64_t *val = opaque;
>>> -
>>> -    visit_type_uint64(v, name, val, errp);
>>> -}
>>> -
>>> static void edu_instance_init(Object *obj)
>>> {
>>>     EduState *edu = EDU(obj);
>>>
>>>     edu->dma_mask = (1UL << 28) - 1;
>>> -    object_property_add(obj, "dma_mask", "uint64", edu_obj_uint64,
>>> -                    edu_obj_uint64, NULL, &edu->dma_mask, NULL);
>>> +    object_property_add_uint64_ptr(obj, "dma_mask",
>>> +                                   &edu->dma_mask, OBJ_PROP_FLAG_READWRITE,
>>> +                                   NULL);
>>> }
>>>
>>> static void edu_class_init(ObjectClass *class, void *data)
>>> diff --git a/hw/pci-host/q35.c b/hw/pci-host/q35.c
>>> index 158d270b9f..f384ab95c6 100644
>>> --- a/hw/pci-host/q35.c
>>> +++ b/hw/pci-host/q35.c
>>> @@ -165,14 +165,6 @@ static void q35_host_get_pci_hole64_end(Object *obj, Visitor *v,
>>>     visit_type_uint64(v, name, &value, errp);
>>> }
>>>
>>> -static void q35_host_get_mmcfg_size(Object *obj, Visitor *v, const char *name,
>>> -                                    void *opaque, Error **errp)
>>> -{
>>> -    PCIExpressHost *e = PCIE_HOST_BRIDGE(obj);
>>> -
>>> -    visit_type_uint64(v, name, &e->size, errp);
>>> -}
>>> -
>>> /*
>>>  * NOTE: setting defaults for the mch.* fields in this table
>>>  * doesn't work, because mch is a separate QOM object that is
>>> @@ -213,6 +205,7 @@ static void q35_host_initfn(Object *obj)
>>> {
>>>     Q35PCIHost *s = Q35_HOST_DEVICE(obj);
>>>     PCIHostState *phb = PCI_HOST_BRIDGE(obj);
>>> +    PCIExpressHost *pehb = PCIE_HOST_BRIDGE(obj);
>>>
>>>     memory_region_init_io(&phb->conf_mem, obj, &pci_host_conf_le_ops, phb,
>>>                           "pci-conf-idx", 4);
>>> @@ -242,9 +235,8 @@ static void q35_host_initfn(Object *obj)
>>>                         q35_host_get_pci_hole64_end,
>>>                         NULL, NULL, NULL, NULL);
>>>
>>> -    object_property_add(obj, PCIE_HOST_MCFG_SIZE, "uint64",
>>> -                        q35_host_get_mmcfg_size,
>>> -                        NULL, NULL, NULL, NULL);
>>> +    object_property_add_uint64_ptr(obj, PCIE_HOST_MCFG_SIZE,
>>> +                                   &pehb->size, OBJ_PROP_FLAG_READ, NULL);
>>>
>>>     object_property_add_link(obj, MCH_HOST_PROP_RAM_MEM, TYPE_MEMORY_REGION,
>>>                              (Object **) &s->mch.ram_memory,
>>> diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
>>> index e076f6023c..668f045023 100644
>>> --- a/hw/ppc/spapr.c
>>> +++ b/hw/ppc/spapr.c
>>> @@ -3227,18 +3227,6 @@ static void spapr_set_resize_hpt(Object *obj, const char *value, Error **errp)
>>>     }
>>> }
>>>
>>> -static void spapr_get_vsmt(Object *obj, Visitor *v, const char *name,
>>> -                                   void *opaque, Error **errp)
>>> -{
>>> -    visit_type_uint32(v, name, (uint32_t *)opaque, errp);
>>> -}
>>> -
>>> -static void spapr_set_vsmt(Object *obj, Visitor *v, const char *name,
>>> -                                   void *opaque, Error **errp)
>>> -{
>>> -    visit_type_uint32(v, name, (uint32_t *)opaque, errp);
>>> -}
>>> -
>>> static char *spapr_get_ic_mode(Object *obj, Error **errp)
>>> {
>>>     SpaprMachineState *spapr = SPAPR_MACHINE(obj);
>>> @@ -3336,8 +3324,10 @@ static void spapr_instance_init(Object *obj)
>>>     object_property_set_description(obj, "resize-hpt",
>>>                                     "Resizing of the Hash Page Table (enabled, disabled, required)",
>>>                                     NULL);
>>> -    object_property_add(obj, "vsmt", "uint32", spapr_get_vsmt,
>>> -                        spapr_set_vsmt, NULL, &spapr->vsmt, &error_abort);
>>> +    object_property_add_uint32_ptr(obj, "vsmt",
>>> +                                   &spapr->vsmt, OBJ_PROP_FLAG_READWRITE,
>>> +                                   &error_abort);
>>
>>
>> Ths looks alright but...
> 
> Ok.
> 
>>
>>
>>> +
>>>     object_property_set_description(obj, "vsmt",
>>>                                     "Virtual SMT: KVM behaves as if this were"
>>>                                     " the host's SMT mode", &error_abort);
>>> diff --git a/hw/vfio/pci-quirks.c b/hw/vfio/pci-quirks.c
>>> index 136f3a9ad6..d769c99bde 100644
>>> --- a/hw/vfio/pci-quirks.c
>>> +++ b/hw/vfio/pci-quirks.c
>>> @@ -2187,14 +2187,6 @@ int vfio_add_virt_caps(VFIOPCIDevice *vdev, Error **errp)
>>>     return 0;
>>> }
>>>
>>> -static void vfio_pci_nvlink2_get_tgt(Object *obj, Visitor *v,
>>> -                                     const char *name,
>>> -                                     void *opaque, Error **errp)
>>> -{
>>> -    uint64_t tgt = (uintptr_t) opaque;
>>> -    visit_type_uint64(v, name, &tgt, errp);
>>> -}
>>> -
>>> static void vfio_pci_nvlink2_get_link_speed(Object *obj, Visitor *v,
>>>                                                  const char *name,
>>>                                                  void *opaque, Error **errp)
>>> @@ -2240,9 +2232,9 @@ int vfio_pci_nvidia_v100_ram_init(VFIOPCIDevice *vdev, Error **errp)
>>>                                nv2reg->size, p);
>>>     QLIST_INSERT_HEAD(&vdev->bars[0].quirks, quirk, next);
>>>
>>> -    object_property_add(OBJECT(vdev), "nvlink2-tgt", "uint64",
>>> -                        vfio_pci_nvlink2_get_tgt, NULL, NULL,
>>> -                        (void *) (uintptr_t) cap->tgt, NULL);
>>> +    object_property_add_uint64_ptr(OBJECT(vdev), "nvlink2-tgt",
>>> +                                   (void *)(uintptr_t)cap->tgt,
>>
>>
>> ... this does not seem equalent. The getter will assume cap->tgt is an
>> userspace address which it is not. &cap->tgt would be QOM-correct but
>> won't work because of the lifetime of @cap but this is another story.
> 
> Maybe I just don't understand where this value comes from. It sounds
> like you know what you are talking about :) so I'll send a v4 and
> leave this method untouched, unless you have a chance to test this and
> tell me that it still works.

This does not work, crashes as:

Thread 1 "qemu-system-ppc" received signal SIGSEGV, Segmentation fault.
0x0000000100a20cd8 in property_get_uint64_ptr (obj=0x102557c10,
v=0x101550dd0, name=0x100c87a48 "nvlink2-tgt", opaque=0x40000000000,
errp=0x7fffffffe8e8) at /home/aik/p/qemu/qom/object.c:2394
2394        uint64_t value = *(uint64_t *)opaque;


Again, object_property_add_uint64_ptr normally takes pointers and
cap->tgt is not a pointer, see the removed vfio_pci_nvlink2_get_tgt()
above - opaque is converted to tgt with  (uintptr_t), not  (uintptr_t*).



>>
>> btw what is this patchset based on? I tried applying it on top of 3 week
>> old and today upstream and it failed. Thanks,
> 
> I'm not sure why there were problems. I just rebased my branch on top
> of latest master (without issues). I pushed it to Github so you can
> have a look. Let me know if you want to try it out or if I should just
> send a v4 straight away dropping the changes immediately above.
> 
> https://github.com/franciozzy/qemu

The franciozzy/autosetters branch with this on top -
https://github.com/aik/qemu/commit/94c33bb7debf
- works fine. Thanks,


> 
> Thanks!
> F.
> 
>>
>>
>>
>>
>>
>>> +                                   OBJ_PROP_FLAG_READ, NULL);
>>>     trace_vfio_pci_nvidia_gpu_setup_quirk(vdev->vbasedev.name, cap->tgt,
>>>                                           nv2reg->size);
>>> free_exit:
>>> @@ -2301,9 +2293,9 @@ int vfio_pci_nvlink2_init(VFIOPCIDevice *vdev, Error **errp)
>>>         QLIST_INSERT_HEAD(&vdev->bars[0].quirks, quirk, next);
>>>     }
>>>
>>> -    object_property_add(OBJECT(vdev), "nvlink2-tgt", "uint64",
>>> -                        vfio_pci_nvlink2_get_tgt, NULL, NULL,
>>> -                        (void *) (uintptr_t) captgt->tgt, NULL);
>>> +    object_property_add_uint64_ptr(OBJECT(vdev), "nvlink2-tgt",
>>> +                                   (void *)(uintptr_t)captgt->tgt,
>>> +                                   OBJ_PROP_FLAG_READ, NULL);
>>>     trace_vfio_pci_nvlink2_setup_quirk_ssatgt(vdev->vbasedev.name, captgt->tgt,
>>>                                               atsdreg->size);
>>>
>>> diff --git a/memory.c b/memory.c
>>> index 06484c2bff..7dac2aa059 100644
>>> --- a/memory.c
>>> +++ b/memory.c
>>> @@ -1158,15 +1158,6 @@ void memory_region_init(MemoryRegion *mr,
>>>     memory_region_do_init(mr, owner, name, size);
>>> }
>>>
>>> -static void memory_region_get_addr(Object *obj, Visitor *v, const char *name,
>>> -                                   void *opaque, Error **errp)
>>> -{
>>> -    MemoryRegion *mr = MEMORY_REGION(obj);
>>> -    uint64_t value = mr->addr;
>>> -
>>> -    visit_type_uint64(v, name, &value, errp);
>>> -}
>>> -
>>> static void memory_region_get_container(Object *obj, Visitor *v,
>>>                                         const char *name, void *opaque,
>>>                                         Error **errp)
>>> @@ -1230,10 +1221,8 @@ static void memory_region_initfn(Object *obj)
>>>                              NULL, NULL, &error_abort);
>>>     op->resolve = memory_region_resolve_container;
>>>
>>> -    object_property_add(OBJECT(mr), "addr", "uint64",
>>> -                        memory_region_get_addr,
>>> -                        NULL, /* memory_region_set_addr */
>>> -                        NULL, NULL, &error_abort);
>>> +    object_property_add_uint64_ptr(OBJECT(mr), "addr",
>>> +                                   &mr->addr, OBJ_PROP_FLAG_READ, &error_abort);
>>>     object_property_add(OBJECT(mr), "priority", "uint32",
>>>                         memory_region_get_priority,
>>>                         NULL, /* memory_region_set_priority */
>>> diff --git a/target/arm/cpu.c b/target/arm/cpu.c
>>> index 7a4ac9339b..bbe25a73c4 100644
>>> --- a/target/arm/cpu.c
>>> +++ b/target/arm/cpu.c
>>> @@ -1039,22 +1039,6 @@ static void arm_set_pmu(Object *obj, bool value, Error **errp)
>>>     cpu->has_pmu = value;
>>> }
>>>
>>> -static void arm_get_init_svtor(Object *obj, Visitor *v, const char *name,
>>> -                               void *opaque, Error **errp)
>>> -{
>>> -    ARMCPU *cpu = ARM_CPU(obj);
>>> -
>>> -    visit_type_uint32(v, name, &cpu->init_svtor, errp);
>>> -}
>>> -
>>> -static void arm_set_init_svtor(Object *obj, Visitor *v, const char *name,
>>> -                               void *opaque, Error **errp)
>>> -{
>>> -    ARMCPU *cpu = ARM_CPU(obj);
>>> -
>>> -    visit_type_uint32(v, name, &cpu->init_svtor, errp);
>>> -}
>>> -
>>> void arm_cpu_post_init(Object *obj)
>>> {
>>>     ARMCPU *cpu = ARM_CPU(obj);
>>> @@ -1165,9 +1149,9 @@ void arm_cpu_post_init(Object *obj)
>>>          * a simple DEFINE_PROP_UINT32 for this because we want to permit
>>>          * the property to be set after realize.
>>>          */
>>> -        object_property_add(obj, "init-svtor", "uint32",
>>> -                            arm_get_init_svtor, arm_set_init_svtor,
>>> -                            NULL, NULL, &error_abort);
>>> +        object_property_add_uint32_ptr(obj, "init-svtor",
>>> +                                       &cpu->init_svtor,
>>> +                                       OBJ_PROP_FLAG_READWRITE, &error_abort);
>>>     }
>>>
>>>     qdev_property_add_static(DEVICE(obj), &arm_cpu_cfgend_property,
>>> diff --git a/target/i386/sev.c b/target/i386/sev.c
>>> index 024bb24e51..846018a12d 100644
>>> --- a/target/i386/sev.c
>>> +++ b/target/i386/sev.c
>>> @@ -266,94 +266,6 @@ qsev_guest_class_init(ObjectClass *oc, void *data)
>>>             "guest owners session parameters (encoded with base64)", NULL);
>>> }
>>>
>>> -static void
>>> -qsev_guest_set_handle(Object *obj, Visitor *v, const char *name,
>>> -                      void *opaque, Error **errp)
>>> -{
>>> -    QSevGuestInfo *sev = QSEV_GUEST_INFO(obj);
>>> -    uint32_t value;
>>> -
>>> -    visit_type_uint32(v, name, &value, errp);
>>> -    sev->handle = value;
>>> -}
>>> -
>>> -static void
>>> -qsev_guest_set_policy(Object *obj, Visitor *v, const char *name,
>>> -                      void *opaque, Error **errp)
>>> -{
>>> -    QSevGuestInfo *sev = QSEV_GUEST_INFO(obj);
>>> -    uint32_t value;
>>> -
>>> -    visit_type_uint32(v, name, &value, errp);
>>> -    sev->policy = value;
>>> -}
>>> -
>>> -static void
>>> -qsev_guest_set_cbitpos(Object *obj, Visitor *v, const char *name,
>>> -                       void *opaque, Error **errp)
>>> -{
>>> -    QSevGuestInfo *sev = QSEV_GUEST_INFO(obj);
>>> -    uint32_t value;
>>> -
>>> -    visit_type_uint32(v, name, &value, errp);
>>> -    sev->cbitpos = value;
>>> -}
>>> -
>>> -static void
>>> -qsev_guest_set_reduced_phys_bits(Object *obj, Visitor *v, const char *name,
>>> -                                   void *opaque, Error **errp)
>>> -{
>>> -    QSevGuestInfo *sev = QSEV_GUEST_INFO(obj);
>>> -    uint32_t value;
>>> -
>>> -    visit_type_uint32(v, name, &value, errp);
>>> -    sev->reduced_phys_bits = value;
>>> -}
>>> -
>>> -static void
>>> -qsev_guest_get_policy(Object *obj, Visitor *v, const char *name,
>>> -                      void *opaque, Error **errp)
>>> -{
>>> -    uint32_t value;
>>> -    QSevGuestInfo *sev = QSEV_GUEST_INFO(obj);
>>> -
>>> -    value = sev->policy;
>>> -    visit_type_uint32(v, name, &value, errp);
>>> -}
>>> -
>>> -static void
>>> -qsev_guest_get_handle(Object *obj, Visitor *v, const char *name,
>>> -                      void *opaque, Error **errp)
>>> -{
>>> -    uint32_t value;
>>> -    QSevGuestInfo *sev = QSEV_GUEST_INFO(obj);
>>> -
>>> -    value = sev->handle;
>>> -    visit_type_uint32(v, name, &value, errp);
>>> -}
>>> -
>>> -static void
>>> -qsev_guest_get_cbitpos(Object *obj, Visitor *v, const char *name,
>>> -                       void *opaque, Error **errp)
>>> -{
>>> -    uint32_t value;
>>> -    QSevGuestInfo *sev = QSEV_GUEST_INFO(obj);
>>> -
>>> -    value = sev->cbitpos;
>>> -    visit_type_uint32(v, name, &value, errp);
>>> -}
>>> -
>>> -static void
>>> -qsev_guest_get_reduced_phys_bits(Object *obj, Visitor *v, const char *name,
>>> -                                   void *opaque, Error **errp)
>>> -{
>>> -    uint32_t value;
>>> -    QSevGuestInfo *sev = QSEV_GUEST_INFO(obj);
>>> -
>>> -    value = sev->reduced_phys_bits;
>>> -    visit_type_uint32(v, name, &value, errp);
>>> -}
>>> -
>>> static void
>>> qsev_guest_init(Object *obj)
>>> {
>>> @@ -361,15 +273,15 @@ qsev_guest_init(Object *obj)
>>>
>>>     sev->sev_device = g_strdup(DEFAULT_SEV_DEVICE);
>>>     sev->policy = DEFAULT_GUEST_POLICY;
>>> -    object_property_add(obj, "policy", "uint32", qsev_guest_get_policy,
>>> -                        qsev_guest_set_policy, NULL, NULL, NULL);
>>> -    object_property_add(obj, "handle", "uint32", qsev_guest_get_handle,
>>> -                        qsev_guest_set_handle, NULL, NULL, NULL);
>>> -    object_property_add(obj, "cbitpos", "uint32", qsev_guest_get_cbitpos,
>>> -                        qsev_guest_set_cbitpos, NULL, NULL, NULL);
>>> -    object_property_add(obj, "reduced-phys-bits", "uint32",
>>> -                        qsev_guest_get_reduced_phys_bits,
>>> -                        qsev_guest_set_reduced_phys_bits, NULL, NULL, NULL);
>>> +    object_property_add_uint32_ptr(obj, "policy", &sev->policy,
>>> +                                   OBJ_PROP_FLAG_READWRITE, NULL);
>>> +    object_property_add_uint32_ptr(obj, "handle", &sev->handle,
>>> +                                   OBJ_PROP_FLAG_READWRITE, NULL);
>>> +    object_property_add_uint32_ptr(obj, "cbitpos", &sev->cbitpos,
>>> +                                   OBJ_PROP_FLAG_READWRITE, NULL);
>>> +    object_property_add_uint32_ptr(obj, "reduced-phys-bits",
>>> +                                   &sev->reduced_phys_bits,
>>> +                                   OBJ_PROP_FLAG_READWRITE, NULL);
>>> }
>>>
>>> /* sev guest info */
>>>
>>
>> -- 
>> Alexey
>

Hi Alexey,

I don't know how, but somehow I didn't receive your reply:
https://lists.gnu.org/archive/html/qemu-devel/2019-12/msg02127.html

(I was about to follow up, then I decided to look at the archives to
make sure your response didn't get lost in my client somehow...)

Still not sure of what happened, lol, let's move on. :)

I'm top-posting as I couldn't pull your response in for a proper reply.

You said:
> The franciozzy/autosetters branch with this on top -
> https://github.com/aik/qemu/commit/94c33bb7debf
> - works fine. Thanks,

Your patch basically reverts a part of my commit and then makes the
change Marc-Andre recommended (by dropping the (void *) cast).

Is it ok for me to just drop that part of my patch and send the v4?

You can follow-up on the cast change afterwards.

Thanks,
F.


> On Dec 10, 2019, at 1:04 PM, Felipe Franciosi <felipe@nutanix.com> wrote:
> 
> Hi
> 
>> On Dec 2, 2019, at 6:31 AM, Alexey Kardashevskiy <aik@ozlabs.ru> wrote:
>> 
>> 
>> 
>> On 30/11/2019 04:46, Felipe Franciosi wrote:
>>> Several objects implemented their own uint property getters and setters,
>>> despite them being straightforward (without any checks/validations on
>>> the values themselves) and identical across objects. This makes use of
>>> an enhanced API for object_property_add_uintXX_ptr() which offers
>>> default setters.
>>> 
>>> Some of these setters used to update the value even if the type visit
>>> failed (eg. because the value being set overflowed over the given type).
>>> The new setter introduces a check for these errors, not updating the
>>> value if an error occurred. The error is propagated.
>>> 
>>> Signed-off-by: Felipe Franciosi <felipe@nutanix.com>
>>> ---
>>> hw/acpi/ich9.c       |  95 ++++----------------------------------
>>> hw/isa/lpc_ich9.c    |  12 +----
>>> hw/misc/edu.c        |  13 ++----
>>> hw/pci-host/q35.c    |  14 ++----
>>> hw/ppc/spapr.c       |  18 ++------
>>> hw/vfio/pci-quirks.c |  20 +++-----
>>> memory.c             |  15 +-----
>>> target/arm/cpu.c     |  22 ++-------
>>> target/i386/sev.c    | 106 ++++---------------------------------------
>>> 9 files changed, 40 insertions(+), 275 deletions(-)
>>> 
>>> diff --git a/hw/acpi/ich9.c b/hw/acpi/ich9.c
>>> index 742fb78226..d9305be891 100644
>>> --- a/hw/acpi/ich9.c
>>> +++ b/hw/acpi/ich9.c
>>> @@ -357,81 +357,6 @@ static void ich9_pm_set_cpu_hotplug_legacy(Object *obj, bool value,
>>>    s->pm.cpu_hotplug_legacy = value;
>>> }
>>> 
>>> -static void ich9_pm_get_disable_s3(Object *obj, Visitor *v, const char *name,
>>> -                                   void *opaque, Error **errp)
>>> -{
>>> -    ICH9LPCPMRegs *pm = opaque;
>>> -    uint8_t value = pm->disable_s3;
>>> -
>>> -    visit_type_uint8(v, name, &value, errp);
>>> -}
>>> -
>>> -static void ich9_pm_set_disable_s3(Object *obj, Visitor *v, const char *name,
>>> -                                   void *opaque, Error **errp)
>>> -{
>>> -    ICH9LPCPMRegs *pm = opaque;
>>> -    Error *local_err = NULL;
>>> -    uint8_t value;
>>> -
>>> -    visit_type_uint8(v, name, &value, &local_err);
>>> -    if (local_err) {
>>> -        goto out;
>>> -    }
>>> -    pm->disable_s3 = value;
>>> -out:
>>> -    error_propagate(errp, local_err);
>>> -}
>>> -
>>> -static void ich9_pm_get_disable_s4(Object *obj, Visitor *v, const char *name,
>>> -                                   void *opaque, Error **errp)
>>> -{
>>> -    ICH9LPCPMRegs *pm = opaque;
>>> -    uint8_t value = pm->disable_s4;
>>> -
>>> -    visit_type_uint8(v, name, &value, errp);
>>> -}
>>> -
>>> -static void ich9_pm_set_disable_s4(Object *obj, Visitor *v, const char *name,
>>> -                                   void *opaque, Error **errp)
>>> -{
>>> -    ICH9LPCPMRegs *pm = opaque;
>>> -    Error *local_err = NULL;
>>> -    uint8_t value;
>>> -
>>> -    visit_type_uint8(v, name, &value, &local_err);
>>> -    if (local_err) {
>>> -        goto out;
>>> -    }
>>> -    pm->disable_s4 = value;
>>> -out:
>>> -    error_propagate(errp, local_err);
>>> -}
>>> -
>>> -static void ich9_pm_get_s4_val(Object *obj, Visitor *v, const char *name,
>>> -                               void *opaque, Error **errp)
>>> -{
>>> -    ICH9LPCPMRegs *pm = opaque;
>>> -    uint8_t value = pm->s4_val;
>>> -
>>> -    visit_type_uint8(v, name, &value, errp);
>>> -}
>>> -
>>> -static void ich9_pm_set_s4_val(Object *obj, Visitor *v, const char *name,
>>> -                               void *opaque, Error **errp)
>>> -{
>>> -    ICH9LPCPMRegs *pm = opaque;
>>> -    Error *local_err = NULL;
>>> -    uint8_t value;
>>> -
>>> -    visit_type_uint8(v, name, &value, &local_err);
>>> -    if (local_err) {
>>> -        goto out;
>>> -    }
>>> -    pm->s4_val = value;
>>> -out:
>>> -    error_propagate(errp, local_err);
>>> -}
>>> -
>>> static bool ich9_pm_get_enable_tco(Object *obj, Error **errp)
>>> {
>>>    ICH9LPCState *s = ICH9_LPC_DEVICE(obj);
>>> @@ -468,18 +393,14 @@ void ich9_pm_add_properties(Object *obj, ICH9LPCPMRegs *pm, Error **errp)
>>>                             ich9_pm_get_cpu_hotplug_legacy,
>>>                             ich9_pm_set_cpu_hotplug_legacy,
>>>                             NULL);
>>> -    object_property_add(obj, ACPI_PM_PROP_S3_DISABLED, "uint8",
>>> -                        ich9_pm_get_disable_s3,
>>> -                        ich9_pm_set_disable_s3,
>>> -                        NULL, pm, NULL);
>>> -    object_property_add(obj, ACPI_PM_PROP_S4_DISABLED, "uint8",
>>> -                        ich9_pm_get_disable_s4,
>>> -                        ich9_pm_set_disable_s4,
>>> -                        NULL, pm, NULL);
>>> -    object_property_add(obj, ACPI_PM_PROP_S4_VAL, "uint8",
>>> -                        ich9_pm_get_s4_val,
>>> -                        ich9_pm_set_s4_val,
>>> -                        NULL, pm, NULL);
>>> +    object_property_add_uint8_ptr(obj, ACPI_PM_PROP_S3_DISABLED,
>>> +                                  &pm->disable_s3, OBJ_PROP_FLAG_READWRITE,
>>> +                                  NULL);
>>> +    object_property_add_uint8_ptr(obj, ACPI_PM_PROP_S4_DISABLED,
>>> +                                  &pm->disable_s4, OBJ_PROP_FLAG_READWRITE,
>>> +                                  NULL);
>>> +    object_property_add_uint8_ptr(obj, ACPI_PM_PROP_S4_VAL,
>>> +                                  &pm->s4_val, OBJ_PROP_FLAG_READWRITE, NULL);
>>>    object_property_add_bool(obj, ACPI_PM_PROP_TCO_ENABLED,
>>>                             ich9_pm_get_enable_tco,
>>>                             ich9_pm_set_enable_tco,
>>> diff --git a/hw/isa/lpc_ich9.c b/hw/isa/lpc_ich9.c
>>> index c40bb3c420..b99a613954 100644
>>> --- a/hw/isa/lpc_ich9.c
>>> +++ b/hw/isa/lpc_ich9.c
>>> @@ -627,13 +627,6 @@ static const MemoryRegionOps ich9_rst_cnt_ops = {
>>>    .endianness = DEVICE_LITTLE_ENDIAN
>>> };
>>> 
>>> -static void ich9_lpc_get_sci_int(Object *obj, Visitor *v, const char *name,
>>> -                                 void *opaque, Error **errp)
>>> -{
>>> -    ICH9LPCState *lpc = ICH9_LPC_DEVICE(obj);
>>> -    visit_type_uint8(v, name, &lpc->sci_gsi, errp);
>>> -}
>>> -
>>> static void ich9_lpc_initfn(Object *obj)
>>> {
>>>    ICH9LPCState *lpc = ICH9_LPC_DEVICE(obj);
>>> @@ -641,9 +634,8 @@ static void ich9_lpc_initfn(Object *obj)
>>>    static const uint8_t acpi_enable_cmd = ICH9_APM_ACPI_ENABLE;
>>>    static const uint8_t acpi_disable_cmd = ICH9_APM_ACPI_DISABLE;
>>> 
>>> -    object_property_add(obj, ACPI_PM_PROP_SCI_INT, "uint8",
>>> -                        ich9_lpc_get_sci_int,
>>> -                        NULL, NULL, NULL, NULL);
>>> +    object_property_add_uint8_ptr(obj, ACPI_PM_PROP_SCI_INT,
>>> +                                  &lpc->sci_gsi, OBJ_PROP_FLAG_READ, NULL);
>>>    object_property_add_uint8_ptr(OBJECT(lpc), ACPI_PM_PROP_ACPI_ENABLE_CMD,
>>>                                  &acpi_enable_cmd, OBJ_PROP_FLAG_READ, NULL);
>>>    object_property_add_uint8_ptr(OBJECT(lpc), ACPI_PM_PROP_ACPI_DISABLE_CMD,
>>> diff --git a/hw/misc/edu.c b/hw/misc/edu.c
>>> index d5e2bdbb57..ff10f5b794 100644
>>> --- a/hw/misc/edu.c
>>> +++ b/hw/misc/edu.c
>>> @@ -396,21 +396,14 @@ static void pci_edu_uninit(PCIDevice *pdev)
>>>    msi_uninit(pdev);
>>> }
>>> 
>>> -static void edu_obj_uint64(Object *obj, Visitor *v, const char *name,
>>> -                           void *opaque, Error **errp)
>>> -{
>>> -    uint64_t *val = opaque;
>>> -
>>> -    visit_type_uint64(v, name, val, errp);
>>> -}
>>> -
>>> static void edu_instance_init(Object *obj)
>>> {
>>>    EduState *edu = EDU(obj);
>>> 
>>>    edu->dma_mask = (1UL << 28) - 1;
>>> -    object_property_add(obj, "dma_mask", "uint64", edu_obj_uint64,
>>> -                    edu_obj_uint64, NULL, &edu->dma_mask, NULL);
>>> +    object_property_add_uint64_ptr(obj, "dma_mask",
>>> +                                   &edu->dma_mask, OBJ_PROP_FLAG_READWRITE,
>>> +                                   NULL);
>>> }
>>> 
>>> static void edu_class_init(ObjectClass *class, void *data)
>>> diff --git a/hw/pci-host/q35.c b/hw/pci-host/q35.c
>>> index 158d270b9f..f384ab95c6 100644
>>> --- a/hw/pci-host/q35.c
>>> +++ b/hw/pci-host/q35.c
>>> @@ -165,14 +165,6 @@ static void q35_host_get_pci_hole64_end(Object *obj, Visitor *v,
>>>    visit_type_uint64(v, name, &value, errp);
>>> }
>>> 
>>> -static void q35_host_get_mmcfg_size(Object *obj, Visitor *v, const char *name,
>>> -                                    void *opaque, Error **errp)
>>> -{
>>> -    PCIExpressHost *e = PCIE_HOST_BRIDGE(obj);
>>> -
>>> -    visit_type_uint64(v, name, &e->size, errp);
>>> -}
>>> -
>>> /*
>>> * NOTE: setting defaults for the mch.* fields in this table
>>> * doesn't work, because mch is a separate QOM object that is
>>> @@ -213,6 +205,7 @@ static void q35_host_initfn(Object *obj)
>>> {
>>>    Q35PCIHost *s = Q35_HOST_DEVICE(obj);
>>>    PCIHostState *phb = PCI_HOST_BRIDGE(obj);
>>> +    PCIExpressHost *pehb = PCIE_HOST_BRIDGE(obj);
>>> 
>>>    memory_region_init_io(&phb->conf_mem, obj, &pci_host_conf_le_ops, phb,
>>>                          "pci-conf-idx", 4);
>>> @@ -242,9 +235,8 @@ static void q35_host_initfn(Object *obj)
>>>                        q35_host_get_pci_hole64_end,
>>>                        NULL, NULL, NULL, NULL);
>>> 
>>> -    object_property_add(obj, PCIE_HOST_MCFG_SIZE, "uint64",
>>> -                        q35_host_get_mmcfg_size,
>>> -                        NULL, NULL, NULL, NULL);
>>> +    object_property_add_uint64_ptr(obj, PCIE_HOST_MCFG_SIZE,
>>> +                                   &pehb->size, OBJ_PROP_FLAG_READ, NULL);
>>> 
>>>    object_property_add_link(obj, MCH_HOST_PROP_RAM_MEM, TYPE_MEMORY_REGION,
>>>                             (Object **) &s->mch.ram_memory,
>>> diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
>>> index e076f6023c..668f045023 100644
>>> --- a/hw/ppc/spapr.c
>>> +++ b/hw/ppc/spapr.c
>>> @@ -3227,18 +3227,6 @@ static void spapr_set_resize_hpt(Object *obj, const char *value, Error **errp)
>>>    }
>>> }
>>> 
>>> -static void spapr_get_vsmt(Object *obj, Visitor *v, const char *name,
>>> -                                   void *opaque, Error **errp)
>>> -{
>>> -    visit_type_uint32(v, name, (uint32_t *)opaque, errp);
>>> -}
>>> -
>>> -static void spapr_set_vsmt(Object *obj, Visitor *v, const char *name,
>>> -                                   void *opaque, Error **errp)
>>> -{
>>> -    visit_type_uint32(v, name, (uint32_t *)opaque, errp);
>>> -}
>>> -
>>> static char *spapr_get_ic_mode(Object *obj, Error **errp)
>>> {
>>>    SpaprMachineState *spapr = SPAPR_MACHINE(obj);
>>> @@ -3336,8 +3324,10 @@ static void spapr_instance_init(Object *obj)
>>>    object_property_set_description(obj, "resize-hpt",
>>>                                    "Resizing of the Hash Page Table (enabled, disabled, required)",
>>>                                    NULL);
>>> -    object_property_add(obj, "vsmt", "uint32", spapr_get_vsmt,
>>> -                        spapr_set_vsmt, NULL, &spapr->vsmt, &error_abort);
>>> +    object_property_add_uint32_ptr(obj, "vsmt",
>>> +                                   &spapr->vsmt, OBJ_PROP_FLAG_READWRITE,
>>> +                                   &error_abort);
>> 
>> 
>> Ths looks alright but...
> 
> Ok.
> 
>> 
>> 
>>> +
>>>    object_property_set_description(obj, "vsmt",
>>>                                    "Virtual SMT: KVM behaves as if this were"
>>>                                    " the host's SMT mode", &error_abort);
>>> diff --git a/hw/vfio/pci-quirks.c b/hw/vfio/pci-quirks.c
>>> index 136f3a9ad6..d769c99bde 100644
>>> --- a/hw/vfio/pci-quirks.c
>>> +++ b/hw/vfio/pci-quirks.c
>>> @@ -2187,14 +2187,6 @@ int vfio_add_virt_caps(VFIOPCIDevice *vdev, Error **errp)
>>>    return 0;
>>> }
>>> 
>>> -static void vfio_pci_nvlink2_get_tgt(Object *obj, Visitor *v,
>>> -                                     const char *name,
>>> -                                     void *opaque, Error **errp)
>>> -{
>>> -    uint64_t tgt = (uintptr_t) opaque;
>>> -    visit_type_uint64(v, name, &tgt, errp);
>>> -}
>>> -
>>> static void vfio_pci_nvlink2_get_link_speed(Object *obj, Visitor *v,
>>>                                                 const char *name,
>>>                                                 void *opaque, Error **errp)
>>> @@ -2240,9 +2232,9 @@ int vfio_pci_nvidia_v100_ram_init(VFIOPCIDevice *vdev, Error **errp)
>>>                               nv2reg->size, p);
>>>    QLIST_INSERT_HEAD(&vdev->bars[0].quirks, quirk, next);
>>> 
>>> -    object_property_add(OBJECT(vdev), "nvlink2-tgt", "uint64",
>>> -                        vfio_pci_nvlink2_get_tgt, NULL, NULL,
>>> -                        (void *) (uintptr_t) cap->tgt, NULL);
>>> +    object_property_add_uint64_ptr(OBJECT(vdev), "nvlink2-tgt",
>>> +                                   (void *)(uintptr_t)cap->tgt,
>> 
>> 
>> ... this does not seem equalent. The getter will assume cap->tgt is an
>> userspace address which it is not. &cap->tgt would be QOM-correct but
>> won't work because of the lifetime of @cap but this is another story.
> 
> Maybe I just don't understand where this value comes from. It sounds
> like you know what you are talking about :) so I'll send a v4 and
> leave this method untouched, unless you have a chance to test this and
> tell me that it still works.
> 
>> 
>> btw what is this patchset based on? I tried applying it on top of 3 week
>> old and today upstream and it failed. Thanks,
> 
> I'm not sure why there were problems. I just rebased my branch on top
> of latest master (without issues). I pushed it to Github so you can
> have a look. Let me know if you want to try it out or if I should just
> send a v4 straight away dropping the changes immediately above.
> 
> https://github.com/franciozzy/qemu
> 
> Thanks!
> F.
> 
>> 
>> 
>> 
>> 
>> 
>>> +                                   OBJ_PROP_FLAG_READ, NULL);
>>>    trace_vfio_pci_nvidia_gpu_setup_quirk(vdev->vbasedev.name, cap->tgt,
>>>                                          nv2reg->size);
>>> free_exit:
>>> @@ -2301,9 +2293,9 @@ int vfio_pci_nvlink2_init(VFIOPCIDevice *vdev, Error **errp)
>>>        QLIST_INSERT_HEAD(&vdev->bars[0].quirks, quirk, next);
>>>    }
>>> 
>>> -    object_property_add(OBJECT(vdev), "nvlink2-tgt", "uint64",
>>> -                        vfio_pci_nvlink2_get_tgt, NULL, NULL,
>>> -                        (void *) (uintptr_t) captgt->tgt, NULL);
>>> +    object_property_add_uint64_ptr(OBJECT(vdev), "nvlink2-tgt",
>>> +                                   (void *)(uintptr_t)captgt->tgt,
>>> +                                   OBJ_PROP_FLAG_READ, NULL);
>>>    trace_vfio_pci_nvlink2_setup_quirk_ssatgt(vdev->vbasedev.name, captgt->tgt,
>>>                                              atsdreg->size);
>>> 
>>> diff --git a/memory.c b/memory.c
>>> index 06484c2bff..7dac2aa059 100644
>>> --- a/memory.c
>>> +++ b/memory.c
>>> @@ -1158,15 +1158,6 @@ void memory_region_init(MemoryRegion *mr,
>>>    memory_region_do_init(mr, owner, name, size);
>>> }
>>> 
>>> -static void memory_region_get_addr(Object *obj, Visitor *v, const char *name,
>>> -                                   void *opaque, Error **errp)
>>> -{
>>> -    MemoryRegion *mr = MEMORY_REGION(obj);
>>> -    uint64_t value = mr->addr;
>>> -
>>> -    visit_type_uint64(v, name, &value, errp);
>>> -}
>>> -
>>> static void memory_region_get_container(Object *obj, Visitor *v,
>>>                                        const char *name, void *opaque,
>>>                                        Error **errp)
>>> @@ -1230,10 +1221,8 @@ static void memory_region_initfn(Object *obj)
>>>                             NULL, NULL, &error_abort);
>>>    op->resolve = memory_region_resolve_container;
>>> 
>>> -    object_property_add(OBJECT(mr), "addr", "uint64",
>>> -                        memory_region_get_addr,
>>> -                        NULL, /* memory_region_set_addr */
>>> -                        NULL, NULL, &error_abort);
>>> +    object_property_add_uint64_ptr(OBJECT(mr), "addr",
>>> +                                   &mr->addr, OBJ_PROP_FLAG_READ, &error_abort);
>>>    object_property_add(OBJECT(mr), "priority", "uint32",
>>>                        memory_region_get_priority,
>>>                        NULL, /* memory_region_set_priority */
>>> diff --git a/target/arm/cpu.c b/target/arm/cpu.c
>>> index 7a4ac9339b..bbe25a73c4 100644
>>> --- a/target/arm/cpu.c
>>> +++ b/target/arm/cpu.c
>>> @@ -1039,22 +1039,6 @@ static void arm_set_pmu(Object *obj, bool value, Error **errp)
>>>    cpu->has_pmu = value;
>>> }
>>> 
>>> -static void arm_get_init_svtor(Object *obj, Visitor *v, const char *name,
>>> -                               void *opaque, Error **errp)
>>> -{
>>> -    ARMCPU *cpu = ARM_CPU(obj);
>>> -
>>> -    visit_type_uint32(v, name, &cpu->init_svtor, errp);
>>> -}
>>> -
>>> -static void arm_set_init_svtor(Object *obj, Visitor *v, const char *name,
>>> -                               void *opaque, Error **errp)
>>> -{
>>> -    ARMCPU *cpu = ARM_CPU(obj);
>>> -
>>> -    visit_type_uint32(v, name, &cpu->init_svtor, errp);
>>> -}
>>> -
>>> void arm_cpu_post_init(Object *obj)
>>> {
>>>    ARMCPU *cpu = ARM_CPU(obj);
>>> @@ -1165,9 +1149,9 @@ void arm_cpu_post_init(Object *obj)
>>>         * a simple DEFINE_PROP_UINT32 for this because we want to permit
>>>         * the property to be set after realize.
>>>         */
>>> -        object_property_add(obj, "init-svtor", "uint32",
>>> -                            arm_get_init_svtor, arm_set_init_svtor,
>>> -                            NULL, NULL, &error_abort);
>>> +        object_property_add_uint32_ptr(obj, "init-svtor",
>>> +                                       &cpu->init_svtor,
>>> +                                       OBJ_PROP_FLAG_READWRITE, &error_abort);
>>>    }
>>> 
>>>    qdev_property_add_static(DEVICE(obj), &arm_cpu_cfgend_property,
>>> diff --git a/target/i386/sev.c b/target/i386/sev.c
>>> index 024bb24e51..846018a12d 100644
>>> --- a/target/i386/sev.c
>>> +++ b/target/i386/sev.c
>>> @@ -266,94 +266,6 @@ qsev_guest_class_init(ObjectClass *oc, void *data)
>>>            "guest owners session parameters (encoded with base64)", NULL);
>>> }
>>> 
>>> -static void
>>> -qsev_guest_set_handle(Object *obj, Visitor *v, const char *name,
>>> -                      void *opaque, Error **errp)
>>> -{
>>> -    QSevGuestInfo *sev = QSEV_GUEST_INFO(obj);
>>> -    uint32_t value;
>>> -
>>> -    visit_type_uint32(v, name, &value, errp);
>>> -    sev->handle = value;
>>> -}
>>> -
>>> -static void
>>> -qsev_guest_set_policy(Object *obj, Visitor *v, const char *name,
>>> -                      void *opaque, Error **errp)
>>> -{
>>> -    QSevGuestInfo *sev = QSEV_GUEST_INFO(obj);
>>> -    uint32_t value;
>>> -
>>> -    visit_type_uint32(v, name, &value, errp);
>>> -    sev->policy = value;
>>> -}
>>> -
>>> -static void
>>> -qsev_guest_set_cbitpos(Object *obj, Visitor *v, const char *name,
>>> -                       void *opaque, Error **errp)
>>> -{
>>> -    QSevGuestInfo *sev = QSEV_GUEST_INFO(obj);
>>> -    uint32_t value;
>>> -
>>> -    visit_type_uint32(v, name, &value, errp);
>>> -    sev->cbitpos = value;
>>> -}
>>> -
>>> -static void
>>> -qsev_guest_set_reduced_phys_bits(Object *obj, Visitor *v, const char *name,
>>> -                                   void *opaque, Error **errp)
>>> -{
>>> -    QSevGuestInfo *sev = QSEV_GUEST_INFO(obj);
>>> -    uint32_t value;
>>> -
>>> -    visit_type_uint32(v, name, &value, errp);
>>> -    sev->reduced_phys_bits = value;
>>> -}
>>> -
>>> -static void
>>> -qsev_guest_get_policy(Object *obj, Visitor *v, const char *name,
>>> -                      void *opaque, Error **errp)
>>> -{
>>> -    uint32_t value;
>>> -    QSevGuestInfo *sev = QSEV_GUEST_INFO(obj);
>>> -
>>> -    value = sev->policy;
>>> -    visit_type_uint32(v, name, &value, errp);
>>> -}
>>> -
>>> -static void
>>> -qsev_guest_get_handle(Object *obj, Visitor *v, const char *name,
>>> -                      void *opaque, Error **errp)
>>> -{
>>> -    uint32_t value;
>>> -    QSevGuestInfo *sev = QSEV_GUEST_INFO(obj);
>>> -
>>> -    value = sev->handle;
>>> -    visit_type_uint32(v, name, &value, errp);
>>> -}
>>> -
>>> -static void
>>> -qsev_guest_get_cbitpos(Object *obj, Visitor *v, const char *name,
>>> -                       void *opaque, Error **errp)
>>> -{
>>> -    uint32_t value;
>>> -    QSevGuestInfo *sev = QSEV_GUEST_INFO(obj);
>>> -
>>> -    value = sev->cbitpos;
>>> -    visit_type_uint32(v, name, &value, errp);
>>> -}
>>> -
>>> -static void
>>> -qsev_guest_get_reduced_phys_bits(Object *obj, Visitor *v, const char *name,
>>> -                                   void *opaque, Error **errp)
>>> -{
>>> -    uint32_t value;
>>> -    QSevGuestInfo *sev = QSEV_GUEST_INFO(obj);
>>> -
>>> -    value = sev->reduced_phys_bits;
>>> -    visit_type_uint32(v, name, &value, errp);
>>> -}
>>> -
>>> static void
>>> qsev_guest_init(Object *obj)
>>> {
>>> @@ -361,15 +273,15 @@ qsev_guest_init(Object *obj)
>>> 
>>>    sev->sev_device = g_strdup(DEFAULT_SEV_DEVICE);
>>>    sev->policy = DEFAULT_GUEST_POLICY;
>>> -    object_property_add(obj, "policy", "uint32", qsev_guest_get_policy,
>>> -                        qsev_guest_set_policy, NULL, NULL, NULL);
>>> -    object_property_add(obj, "handle", "uint32", qsev_guest_get_handle,
>>> -                        qsev_guest_set_handle, NULL, NULL, NULL);
>>> -    object_property_add(obj, "cbitpos", "uint32", qsev_guest_get_cbitpos,
>>> -                        qsev_guest_set_cbitpos, NULL, NULL, NULL);
>>> -    object_property_add(obj, "reduced-phys-bits", "uint32",
>>> -                        qsev_guest_get_reduced_phys_bits,
>>> -                        qsev_guest_set_reduced_phys_bits, NULL, NULL, NULL);
>>> +    object_property_add_uint32_ptr(obj, "policy", &sev->policy,
>>> +                                   OBJ_PROP_FLAG_READWRITE, NULL);
>>> +    object_property_add_uint32_ptr(obj, "handle", &sev->handle,
>>> +                                   OBJ_PROP_FLAG_READWRITE, NULL);
>>> +    object_property_add_uint32_ptr(obj, "cbitpos", &sev->cbitpos,
>>> +                                   OBJ_PROP_FLAG_READWRITE, NULL);
>>> +    object_property_add_uint32_ptr(obj, "reduced-phys-bits",
>>> +                                   &sev->reduced_phys_bits,
>>> +                                   OBJ_PROP_FLAG_READWRITE, NULL);
>>> }
>>> 
>>> /* sev guest info */
>>> 
>> 
>> -- 
>> Alexey
>

On 18/12/2019 09:19, Felipe Franciosi wrote:
> Hi Alexey,
> 
> I don't know how, but somehow I didn't receive your reply:
> https://lists.gnu.org/archive/html/qemu-devel/2019-12/msg02127.html
> 
> (I was about to follow up, then I decided to look at the archives to
> make sure your response didn't get lost in my client somehow...)
> 
> Still not sure of what happened, lol, let's move on. :)

dunno, I spent time configuring "spf" on ozlabs.ru and gmail to make my
mails go through all possible checks :)


> 
> I'm top-posting as I couldn't pull your response in for a proper reply.
> 
> You said:
>> The franciozzy/autosetters branch with this on top -
>> https://github.com/aik/qemu/commit/94c33bb7debf
>> - works fine. Thanks,
> 
> Your patch basically reverts a part of my commit and then makes the
> change Marc-Andre recommended (by dropping the (void *) cast).
> 
> Is it ok for me to just drop that part of my patch and send the v4?

Yes. Thanks,


> You can follow-up on the cast change afterwards.
>
> Thanks,
> F.
> 
> 
>> On Dec 10, 2019, at 1:04 PM, Felipe Franciosi <felipe@nutanix.com> wrote:
>>
>> Hi
>>
>>> On Dec 2, 2019, at 6:31 AM, Alexey Kardashevskiy <aik@ozlabs.ru> wrote:
>>>
>>>
>>>
>>> On 30/11/2019 04:46, Felipe Franciosi wrote:
>>>> Several objects implemented their own uint property getters and setters,
>>>> despite them being straightforward (without any checks/validations on
>>>> the values themselves) and identical across objects. This makes use of
>>>> an enhanced API for object_property_add_uintXX_ptr() which offers
>>>> default setters.
>>>>
>>>> Some of these setters used to update the value even if the type visit
>>>> failed (eg. because the value being set overflowed over the given type).
>>>> The new setter introduces a check for these errors, not updating the
>>>> value if an error occurred. The error is propagated.
>>>>
>>>> Signed-off-by: Felipe Franciosi <felipe@nutanix.com>
>>>> ---
>>>> hw/acpi/ich9.c       |  95 ++++----------------------------------
>>>> hw/isa/lpc_ich9.c    |  12 +----
>>>> hw/misc/edu.c        |  13 ++----
>>>> hw/pci-host/q35.c    |  14 ++----
>>>> hw/ppc/spapr.c       |  18 ++------
>>>> hw/vfio/pci-quirks.c |  20 +++-----
>>>> memory.c             |  15 +-----
>>>> target/arm/cpu.c     |  22 ++-------
>>>> target/i386/sev.c    | 106 ++++---------------------------------------
>>>> 9 files changed, 40 insertions(+), 275 deletions(-)
>>>>
>>>> diff --git a/hw/acpi/ich9.c b/hw/acpi/ich9.c
>>>> index 742fb78226..d9305be891 100644
>>>> --- a/hw/acpi/ich9.c
>>>> +++ b/hw/acpi/ich9.c
>>>> @@ -357,81 +357,6 @@ static void ich9_pm_set_cpu_hotplug_legacy(Object *obj, bool value,
>>>>    s->pm.cpu_hotplug_legacy = value;
>>>> }
>>>>
>>>> -static void ich9_pm_get_disable_s3(Object *obj, Visitor *v, const char *name,
>>>> -                                   void *opaque, Error **errp)
>>>> -{
>>>> -    ICH9LPCPMRegs *pm = opaque;
>>>> -    uint8_t value = pm->disable_s3;
>>>> -
>>>> -    visit_type_uint8(v, name, &value, errp);
>>>> -}
>>>> -
>>>> -static void ich9_pm_set_disable_s3(Object *obj, Visitor *v, const char *name,
>>>> -                                   void *opaque, Error **errp)
>>>> -{
>>>> -    ICH9LPCPMRegs *pm = opaque;
>>>> -    Error *local_err = NULL;
>>>> -    uint8_t value;
>>>> -
>>>> -    visit_type_uint8(v, name, &value, &local_err);
>>>> -    if (local_err) {
>>>> -        goto out;
>>>> -    }
>>>> -    pm->disable_s3 = value;
>>>> -out:
>>>> -    error_propagate(errp, local_err);
>>>> -}
>>>> -
>>>> -static void ich9_pm_get_disable_s4(Object *obj, Visitor *v, const char *name,
>>>> -                                   void *opaque, Error **errp)
>>>> -{
>>>> -    ICH9LPCPMRegs *pm = opaque;
>>>> -    uint8_t value = pm->disable_s4;
>>>> -
>>>> -    visit_type_uint8(v, name, &value, errp);
>>>> -}
>>>> -
>>>> -static void ich9_pm_set_disable_s4(Object *obj, Visitor *v, const char *name,
>>>> -                                   void *opaque, Error **errp)
>>>> -{
>>>> -    ICH9LPCPMRegs *pm = opaque;
>>>> -    Error *local_err = NULL;
>>>> -    uint8_t value;
>>>> -
>>>> -    visit_type_uint8(v, name, &value, &local_err);
>>>> -    if (local_err) {
>>>> -        goto out;
>>>> -    }
>>>> -    pm->disable_s4 = value;
>>>> -out:
>>>> -    error_propagate(errp, local_err);
>>>> -}
>>>> -
>>>> -static void ich9_pm_get_s4_val(Object *obj, Visitor *v, const char *name,
>>>> -                               void *opaque, Error **errp)
>>>> -{
>>>> -    ICH9LPCPMRegs *pm = opaque;
>>>> -    uint8_t value = pm->s4_val;
>>>> -
>>>> -    visit_type_uint8(v, name, &value, errp);
>>>> -}
>>>> -
>>>> -static void ich9_pm_set_s4_val(Object *obj, Visitor *v, const char *name,
>>>> -                               void *opaque, Error **errp)
>>>> -{
>>>> -    ICH9LPCPMRegs *pm = opaque;
>>>> -    Error *local_err = NULL;
>>>> -    uint8_t value;
>>>> -
>>>> -    visit_type_uint8(v, name, &value, &local_err);
>>>> -    if (local_err) {
>>>> -        goto out;
>>>> -    }
>>>> -    pm->s4_val = value;
>>>> -out:
>>>> -    error_propagate(errp, local_err);
>>>> -}
>>>> -
>>>> static bool ich9_pm_get_enable_tco(Object *obj, Error **errp)
>>>> {
>>>>    ICH9LPCState *s = ICH9_LPC_DEVICE(obj);
>>>> @@ -468,18 +393,14 @@ void ich9_pm_add_properties(Object *obj, ICH9LPCPMRegs *pm, Error **errp)
>>>>                             ich9_pm_get_cpu_hotplug_legacy,
>>>>                             ich9_pm_set_cpu_hotplug_legacy,
>>>>                             NULL);
>>>> -    object_property_add(obj, ACPI_PM_PROP_S3_DISABLED, "uint8",
>>>> -                        ich9_pm_get_disable_s3,
>>>> -                        ich9_pm_set_disable_s3,
>>>> -                        NULL, pm, NULL);
>>>> -    object_property_add(obj, ACPI_PM_PROP_S4_DISABLED, "uint8",
>>>> -                        ich9_pm_get_disable_s4,
>>>> -                        ich9_pm_set_disable_s4,
>>>> -                        NULL, pm, NULL);
>>>> -    object_property_add(obj, ACPI_PM_PROP_S4_VAL, "uint8",
>>>> -                        ich9_pm_get_s4_val,
>>>> -                        ich9_pm_set_s4_val,
>>>> -                        NULL, pm, NULL);
>>>> +    object_property_add_uint8_ptr(obj, ACPI_PM_PROP_S3_DISABLED,
>>>> +                                  &pm->disable_s3, OBJ_PROP_FLAG_READWRITE,
>>>> +                                  NULL);
>>>> +    object_property_add_uint8_ptr(obj, ACPI_PM_PROP_S4_DISABLED,
>>>> +                                  &pm->disable_s4, OBJ_PROP_FLAG_READWRITE,
>>>> +                                  NULL);
>>>> +    object_property_add_uint8_ptr(obj, ACPI_PM_PROP_S4_VAL,
>>>> +                                  &pm->s4_val, OBJ_PROP_FLAG_READWRITE, NULL);
>>>>    object_property_add_bool(obj, ACPI_PM_PROP_TCO_ENABLED,
>>>>                             ich9_pm_get_enable_tco,
>>>>                             ich9_pm_set_enable_tco,
>>>> diff --git a/hw/isa/lpc_ich9.c b/hw/isa/lpc_ich9.c
>>>> index c40bb3c420..b99a613954 100644
>>>> --- a/hw/isa/lpc_ich9.c
>>>> +++ b/hw/isa/lpc_ich9.c
>>>> @@ -627,13 +627,6 @@ static const MemoryRegionOps ich9_rst_cnt_ops = {
>>>>    .endianness = DEVICE_LITTLE_ENDIAN
>>>> };
>>>>
>>>> -static void ich9_lpc_get_sci_int(Object *obj, Visitor *v, const char *name,
>>>> -                                 void *opaque, Error **errp)
>>>> -{
>>>> -    ICH9LPCState *lpc = ICH9_LPC_DEVICE(obj);
>>>> -    visit_type_uint8(v, name, &lpc->sci_gsi, errp);
>>>> -}
>>>> -
>>>> static void ich9_lpc_initfn(Object *obj)
>>>> {
>>>>    ICH9LPCState *lpc = ICH9_LPC_DEVICE(obj);
>>>> @@ -641,9 +634,8 @@ static void ich9_lpc_initfn(Object *obj)
>>>>    static const uint8_t acpi_enable_cmd = ICH9_APM_ACPI_ENABLE;
>>>>    static const uint8_t acpi_disable_cmd = ICH9_APM_ACPI_DISABLE;
>>>>
>>>> -    object_property_add(obj, ACPI_PM_PROP_SCI_INT, "uint8",
>>>> -                        ich9_lpc_get_sci_int,
>>>> -                        NULL, NULL, NULL, NULL);
>>>> +    object_property_add_uint8_ptr(obj, ACPI_PM_PROP_SCI_INT,
>>>> +                                  &lpc->sci_gsi, OBJ_PROP_FLAG_READ, NULL);
>>>>    object_property_add_uint8_ptr(OBJECT(lpc), ACPI_PM_PROP_ACPI_ENABLE_CMD,
>>>>                                  &acpi_enable_cmd, OBJ_PROP_FLAG_READ, NULL);
>>>>    object_property_add_uint8_ptr(OBJECT(lpc), ACPI_PM_PROP_ACPI_DISABLE_CMD,
>>>> diff --git a/hw/misc/edu.c b/hw/misc/edu.c
>>>> index d5e2bdbb57..ff10f5b794 100644
>>>> --- a/hw/misc/edu.c
>>>> +++ b/hw/misc/edu.c
>>>> @@ -396,21 +396,14 @@ static void pci_edu_uninit(PCIDevice *pdev)
>>>>    msi_uninit(pdev);
>>>> }
>>>>
>>>> -static void edu_obj_uint64(Object *obj, Visitor *v, const char *name,
>>>> -                           void *opaque, Error **errp)
>>>> -{
>>>> -    uint64_t *val = opaque;
>>>> -
>>>> -    visit_type_uint64(v, name, val, errp);
>>>> -}
>>>> -
>>>> static void edu_instance_init(Object *obj)
>>>> {
>>>>    EduState *edu = EDU(obj);
>>>>
>>>>    edu->dma_mask = (1UL << 28) - 1;
>>>> -    object_property_add(obj, "dma_mask", "uint64", edu_obj_uint64,
>>>> -                    edu_obj_uint64, NULL, &edu->dma_mask, NULL);
>>>> +    object_property_add_uint64_ptr(obj, "dma_mask",
>>>> +                                   &edu->dma_mask, OBJ_PROP_FLAG_READWRITE,
>>>> +                                   NULL);
>>>> }
>>>>
>>>> static void edu_class_init(ObjectClass *class, void *data)
>>>> diff --git a/hw/pci-host/q35.c b/hw/pci-host/q35.c
>>>> index 158d270b9f..f384ab95c6 100644
>>>> --- a/hw/pci-host/q35.c
>>>> +++ b/hw/pci-host/q35.c
>>>> @@ -165,14 +165,6 @@ static void q35_host_get_pci_hole64_end(Object *obj, Visitor *v,
>>>>    visit_type_uint64(v, name, &value, errp);
>>>> }
>>>>
>>>> -static void q35_host_get_mmcfg_size(Object *obj, Visitor *v, const char *name,
>>>> -                                    void *opaque, Error **errp)
>>>> -{
>>>> -    PCIExpressHost *e = PCIE_HOST_BRIDGE(obj);
>>>> -
>>>> -    visit_type_uint64(v, name, &e->size, errp);
>>>> -}
>>>> -
>>>> /*
>>>> * NOTE: setting defaults for the mch.* fields in this table
>>>> * doesn't work, because mch is a separate QOM object that is
>>>> @@ -213,6 +205,7 @@ static void q35_host_initfn(Object *obj)
>>>> {
>>>>    Q35PCIHost *s = Q35_HOST_DEVICE(obj);
>>>>    PCIHostState *phb = PCI_HOST_BRIDGE(obj);
>>>> +    PCIExpressHost *pehb = PCIE_HOST_BRIDGE(obj);
>>>>
>>>>    memory_region_init_io(&phb->conf_mem, obj, &pci_host_conf_le_ops, phb,
>>>>                          "pci-conf-idx", 4);
>>>> @@ -242,9 +235,8 @@ static void q35_host_initfn(Object *obj)
>>>>                        q35_host_get_pci_hole64_end,
>>>>                        NULL, NULL, NULL, NULL);
>>>>
>>>> -    object_property_add(obj, PCIE_HOST_MCFG_SIZE, "uint64",
>>>> -                        q35_host_get_mmcfg_size,
>>>> -                        NULL, NULL, NULL, NULL);
>>>> +    object_property_add_uint64_ptr(obj, PCIE_HOST_MCFG_SIZE,
>>>> +                                   &pehb->size, OBJ_PROP_FLAG_READ, NULL);
>>>>
>>>>    object_property_add_link(obj, MCH_HOST_PROP_RAM_MEM, TYPE_MEMORY_REGION,
>>>>                             (Object **) &s->mch.ram_memory,
>>>> diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
>>>> index e076f6023c..668f045023 100644
>>>> --- a/hw/ppc/spapr.c
>>>> +++ b/hw/ppc/spapr.c
>>>> @@ -3227,18 +3227,6 @@ static void spapr_set_resize_hpt(Object *obj, const char *value, Error **errp)
>>>>    }
>>>> }
>>>>
>>>> -static void spapr_get_vsmt(Object *obj, Visitor *v, const char *name,
>>>> -                                   void *opaque, Error **errp)
>>>> -{
>>>> -    visit_type_uint32(v, name, (uint32_t *)opaque, errp);
>>>> -}
>>>> -
>>>> -static void spapr_set_vsmt(Object *obj, Visitor *v, const char *name,
>>>> -                                   void *opaque, Error **errp)
>>>> -{
>>>> -    visit_type_uint32(v, name, (uint32_t *)opaque, errp);
>>>> -}
>>>> -
>>>> static char *spapr_get_ic_mode(Object *obj, Error **errp)
>>>> {
>>>>    SpaprMachineState *spapr = SPAPR_MACHINE(obj);
>>>> @@ -3336,8 +3324,10 @@ static void spapr_instance_init(Object *obj)
>>>>    object_property_set_description(obj, "resize-hpt",
>>>>                                    "Resizing of the Hash Page Table (enabled, disabled, required)",
>>>>                                    NULL);
>>>> -    object_property_add(obj, "vsmt", "uint32", spapr_get_vsmt,
>>>> -                        spapr_set_vsmt, NULL, &spapr->vsmt, &error_abort);
>>>> +    object_property_add_uint32_ptr(obj, "vsmt",
>>>> +                                   &spapr->vsmt, OBJ_PROP_FLAG_READWRITE,
>>>> +                                   &error_abort);
>>>
>>>
>>> Ths looks alright but...
>>
>> Ok.
>>
>>>
>>>
>>>> +
>>>>    object_property_set_description(obj, "vsmt",
>>>>                                    "Virtual SMT: KVM behaves as if this were"
>>>>                                    " the host's SMT mode", &error_abort);
>>>> diff --git a/hw/vfio/pci-quirks.c b/hw/vfio/pci-quirks.c
>>>> index 136f3a9ad6..d769c99bde 100644
>>>> --- a/hw/vfio/pci-quirks.c
>>>> +++ b/hw/vfio/pci-quirks.c
>>>> @@ -2187,14 +2187,6 @@ int vfio_add_virt_caps(VFIOPCIDevice *vdev, Error **errp)
>>>>    return 0;
>>>> }
>>>>
>>>> -static void vfio_pci_nvlink2_get_tgt(Object *obj, Visitor *v,
>>>> -                                     const char *name,
>>>> -                                     void *opaque, Error **errp)
>>>> -{
>>>> -    uint64_t tgt = (uintptr_t) opaque;
>>>> -    visit_type_uint64(v, name, &tgt, errp);
>>>> -}
>>>> -
>>>> static void vfio_pci_nvlink2_get_link_speed(Object *obj, Visitor *v,
>>>>                                                 const char *name,
>>>>                                                 void *opaque, Error **errp)
>>>> @@ -2240,9 +2232,9 @@ int vfio_pci_nvidia_v100_ram_init(VFIOPCIDevice *vdev, Error **errp)
>>>>                               nv2reg->size, p);
>>>>    QLIST_INSERT_HEAD(&vdev->bars[0].quirks, quirk, next);
>>>>
>>>> -    object_property_add(OBJECT(vdev), "nvlink2-tgt", "uint64",
>>>> -                        vfio_pci_nvlink2_get_tgt, NULL, NULL,
>>>> -                        (void *) (uintptr_t) cap->tgt, NULL);
>>>> +    object_property_add_uint64_ptr(OBJECT(vdev), "nvlink2-tgt",
>>>> +                                   (void *)(uintptr_t)cap->tgt,
>>>
>>>
>>> ... this does not seem equalent. The getter will assume cap->tgt is an
>>> userspace address which it is not. &cap->tgt would be QOM-correct but
>>> won't work because of the lifetime of @cap but this is another story.
>>
>> Maybe I just don't understand where this value comes from. It sounds
>> like you know what you are talking about :) so I'll send a v4 and
>> leave this method untouched, unless you have a chance to test this and
>> tell me that it still works.
>>
>>>
>>> btw what is this patchset based on? I tried applying it on top of 3 week
>>> old and today upstream and it failed. Thanks,
>>
>> I'm not sure why there were problems. I just rebased my branch on top
>> of latest master (without issues). I pushed it to Github so you can
>> have a look. Let me know if you want to try it out or if I should just
>> send a v4 straight away dropping the changes immediately above.
>>
>> https://github.com/franciozzy/qemu
>>
>> Thanks!
>> F.
>>
>>>
>>>
>>>
>>>
>>>
>>>> +                                   OBJ_PROP_FLAG_READ, NULL);
>>>>    trace_vfio_pci_nvidia_gpu_setup_quirk(vdev->vbasedev.name, cap->tgt,
>>>>                                          nv2reg->size);
>>>> free_exit:
>>>> @@ -2301,9 +2293,9 @@ int vfio_pci_nvlink2_init(VFIOPCIDevice *vdev, Error **errp)
>>>>        QLIST_INSERT_HEAD(&vdev->bars[0].quirks, quirk, next);
>>>>    }
>>>>
>>>> -    object_property_add(OBJECT(vdev), "nvlink2-tgt", "uint64",
>>>> -                        vfio_pci_nvlink2_get_tgt, NULL, NULL,
>>>> -                        (void *) (uintptr_t) captgt->tgt, NULL);
>>>> +    object_property_add_uint64_ptr(OBJECT(vdev), "nvlink2-tgt",
>>>> +                                   (void *)(uintptr_t)captgt->tgt,
>>>> +                                   OBJ_PROP_FLAG_READ, NULL);
>>>>    trace_vfio_pci_nvlink2_setup_quirk_ssatgt(vdev->vbasedev.name, captgt->tgt,
>>>>                                              atsdreg->size);
>>>>
>>>> diff --git a/memory.c b/memory.c
>>>> index 06484c2bff..7dac2aa059 100644
>>>> --- a/memory.c
>>>> +++ b/memory.c
>>>> @@ -1158,15 +1158,6 @@ void memory_region_init(MemoryRegion *mr,
>>>>    memory_region_do_init(mr, owner, name, size);
>>>> }
>>>>
>>>> -static void memory_region_get_addr(Object *obj, Visitor *v, const char *name,
>>>> -                                   void *opaque, Error **errp)
>>>> -{
>>>> -    MemoryRegion *mr = MEMORY_REGION(obj);
>>>> -    uint64_t value = mr->addr;
>>>> -
>>>> -    visit_type_uint64(v, name, &value, errp);
>>>> -}
>>>> -
>>>> static void memory_region_get_container(Object *obj, Visitor *v,
>>>>                                        const char *name, void *opaque,
>>>>                                        Error **errp)
>>>> @@ -1230,10 +1221,8 @@ static void memory_region_initfn(Object *obj)
>>>>                             NULL, NULL, &error_abort);
>>>>    op->resolve = memory_region_resolve_container;
>>>>
>>>> -    object_property_add(OBJECT(mr), "addr", "uint64",
>>>> -                        memory_region_get_addr,
>>>> -                        NULL, /* memory_region_set_addr */
>>>> -                        NULL, NULL, &error_abort);
>>>> +    object_property_add_uint64_ptr(OBJECT(mr), "addr",
>>>> +                                   &mr->addr, OBJ_PROP_FLAG_READ, &error_abort);
>>>>    object_property_add(OBJECT(mr), "priority", "uint32",
>>>>                        memory_region_get_priority,
>>>>                        NULL, /* memory_region_set_priority */
>>>> diff --git a/target/arm/cpu.c b/target/arm/cpu.c
>>>> index 7a4ac9339b..bbe25a73c4 100644
>>>> --- a/target/arm/cpu.c
>>>> +++ b/target/arm/cpu.c
>>>> @@ -1039,22 +1039,6 @@ static void arm_set_pmu(Object *obj, bool value, Error **errp)
>>>>    cpu->has_pmu = value;
>>>> }
>>>>
>>>> -static void arm_get_init_svtor(Object *obj, Visitor *v, const char *name,
>>>> -                               void *opaque, Error **errp)
>>>> -{
>>>> -    ARMCPU *cpu = ARM_CPU(obj);
>>>> -
>>>> -    visit_type_uint32(v, name, &cpu->init_svtor, errp);
>>>> -}
>>>> -
>>>> -static void arm_set_init_svtor(Object *obj, Visitor *v, const char *name,
>>>> -                               void *opaque, Error **errp)
>>>> -{
>>>> -    ARMCPU *cpu = ARM_CPU(obj);
>>>> -
>>>> -    visit_type_uint32(v, name, &cpu->init_svtor, errp);
>>>> -}
>>>> -
>>>> void arm_cpu_post_init(Object *obj)
>>>> {
>>>>    ARMCPU *cpu = ARM_CPU(obj);
>>>> @@ -1165,9 +1149,9 @@ void arm_cpu_post_init(Object *obj)
>>>>         * a simple DEFINE_PROP_UINT32 for this because we want to permit
>>>>         * the property to be set after realize.
>>>>         */
>>>> -        object_property_add(obj, "init-svtor", "uint32",
>>>> -                            arm_get_init_svtor, arm_set_init_svtor,
>>>> -                            NULL, NULL, &error_abort);
>>>> +        object_property_add_uint32_ptr(obj, "init-svtor",
>>>> +                                       &cpu->init_svtor,
>>>> +                                       OBJ_PROP_FLAG_READWRITE, &error_abort);
>>>>    }
>>>>
>>>>    qdev_property_add_static(DEVICE(obj), &arm_cpu_cfgend_property,
>>>> diff --git a/target/i386/sev.c b/target/i386/sev.c
>>>> index 024bb24e51..846018a12d 100644
>>>> --- a/target/i386/sev.c
>>>> +++ b/target/i386/sev.c
>>>> @@ -266,94 +266,6 @@ qsev_guest_class_init(ObjectClass *oc, void *data)
>>>>            "guest owners session parameters (encoded with base64)", NULL);
>>>> }
>>>>
>>>> -static void
>>>> -qsev_guest_set_handle(Object *obj, Visitor *v, const char *name,
>>>> -                      void *opaque, Error **errp)
>>>> -{
>>>> -    QSevGuestInfo *sev = QSEV_GUEST_INFO(obj);
>>>> -    uint32_t value;
>>>> -
>>>> -    visit_type_uint32(v, name, &value, errp);
>>>> -    sev->handle = value;
>>>> -}
>>>> -
>>>> -static void
>>>> -qsev_guest_set_policy(Object *obj, Visitor *v, const char *name,
>>>> -                      void *opaque, Error **errp)
>>>> -{
>>>> -    QSevGuestInfo *sev = QSEV_GUEST_INFO(obj);
>>>> -    uint32_t value;
>>>> -
>>>> -    visit_type_uint32(v, name, &value, errp);
>>>> -    sev->policy = value;
>>>> -}
>>>> -
>>>> -static void
>>>> -qsev_guest_set_cbitpos(Object *obj, Visitor *v, const char *name,
>>>> -                       void *opaque, Error **errp)
>>>> -{
>>>> -    QSevGuestInfo *sev = QSEV_GUEST_INFO(obj);
>>>> -    uint32_t value;
>>>> -
>>>> -    visit_type_uint32(v, name, &value, errp);
>>>> -    sev->cbitpos = value;
>>>> -}
>>>> -
>>>> -static void
>>>> -qsev_guest_set_reduced_phys_bits(Object *obj, Visitor *v, const char *name,
>>>> -                                   void *opaque, Error **errp)
>>>> -{
>>>> -    QSevGuestInfo *sev = QSEV_GUEST_INFO(obj);
>>>> -    uint32_t value;
>>>> -
>>>> -    visit_type_uint32(v, name, &value, errp);
>>>> -    sev->reduced_phys_bits = value;
>>>> -}
>>>> -
>>>> -static void
>>>> -qsev_guest_get_policy(Object *obj, Visitor *v, const char *name,
>>>> -                      void *opaque, Error **errp)
>>>> -{
>>>> -    uint32_t value;
>>>> -    QSevGuestInfo *sev = QSEV_GUEST_INFO(obj);
>>>> -
>>>> -    value = sev->policy;
>>>> -    visit_type_uint32(v, name, &value, errp);
>>>> -}
>>>> -
>>>> -static void
>>>> -qsev_guest_get_handle(Object *obj, Visitor *v, const char *name,
>>>> -                      void *opaque, Error **errp)
>>>> -{
>>>> -    uint32_t value;
>>>> -    QSevGuestInfo *sev = QSEV_GUEST_INFO(obj);
>>>> -
>>>> -    value = sev->handle;
>>>> -    visit_type_uint32(v, name, &value, errp);
>>>> -}
>>>> -
>>>> -static void
>>>> -qsev_guest_get_cbitpos(Object *obj, Visitor *v, const char *name,
>>>> -                       void *opaque, Error **errp)
>>>> -{
>>>> -    uint32_t value;
>>>> -    QSevGuestInfo *sev = QSEV_GUEST_INFO(obj);
>>>> -
>>>> -    value = sev->cbitpos;
>>>> -    visit_type_uint32(v, name, &value, errp);
>>>> -}
>>>> -
>>>> -static void
>>>> -qsev_guest_get_reduced_phys_bits(Object *obj, Visitor *v, const char *name,
>>>> -                                   void *opaque, Error **errp)
>>>> -{
>>>> -    uint32_t value;
>>>> -    QSevGuestInfo *sev = QSEV_GUEST_INFO(obj);
>>>> -
>>>> -    value = sev->reduced_phys_bits;
>>>> -    visit_type_uint32(v, name, &value, errp);
>>>> -}
>>>> -
>>>> static void
>>>> qsev_guest_init(Object *obj)
>>>> {
>>>> @@ -361,15 +273,15 @@ qsev_guest_init(Object *obj)
>>>>
>>>>    sev->sev_device = g_strdup(DEFAULT_SEV_DEVICE);
>>>>    sev->policy = DEFAULT_GUEST_POLICY;
>>>> -    object_property_add(obj, "policy", "uint32", qsev_guest_get_policy,
>>>> -                        qsev_guest_set_policy, NULL, NULL, NULL);
>>>> -    object_property_add(obj, "handle", "uint32", qsev_guest_get_handle,
>>>> -                        qsev_guest_set_handle, NULL, NULL, NULL);
>>>> -    object_property_add(obj, "cbitpos", "uint32", qsev_guest_get_cbitpos,
>>>> -                        qsev_guest_set_cbitpos, NULL, NULL, NULL);
>>>> -    object_property_add(obj, "reduced-phys-bits", "uint32",
>>>> -                        qsev_guest_get_reduced_phys_bits,
>>>> -                        qsev_guest_set_reduced_phys_bits, NULL, NULL, NULL);
>>>> +    object_property_add_uint32_ptr(obj, "policy", &sev->policy,
>>>> +                                   OBJ_PROP_FLAG_READWRITE, NULL);
>>>> +    object_property_add_uint32_ptr(obj, "handle", &sev->handle,
>>>> +                                   OBJ_PROP_FLAG_READWRITE, NULL);
>>>> +    object_property_add_uint32_ptr(obj, "cbitpos", &sev->cbitpos,
>>>> +                                   OBJ_PROP_FLAG_READWRITE, NULL);
>>>> +    object_property_add_uint32_ptr(obj, "reduced-phys-bits",
>>>> +                                   &sev->reduced_phys_bits,
>>>> +                                   OBJ_PROP_FLAG_READWRITE, NULL);
>>>> }
>>>>
>>>> /* sev guest info */
>>>>
>>>
>>> -- 
>>> Alexey
>>
>