Re: [Qemu-devel] [PATCH] hw/sparc/sun4m: Fix problems with device introspection

[Artyom Tarasenko <atar4qemu@gmail.com>]

On Fri, Jun 15, 2018 at 7:15 AM, Thomas Huth <thuth@redhat.com> wrote:
> On 05.04.2018 12:43, Thomas Huth wrote:
>> Several devices of the sun4m machines are using &error_fatal in
>> their instance_init function and thus can cause QEMU to abort
>> unexpectedly:
>>
>> $ echo "{'execute':'qmp_capabilities'}"\
>>        "{'execute':'device-list-properties',"\
>>        " 'arguments':{'typename':'openprom'}}" \
>>        | sparc-softmmu/qemu-system-sparc -M SS-10 -S -qmp stdio
>> {"QMP": {"version": {"qemu": {"micro": 91, "minor": 11, "major": 2},
>>  "package": "build-all"}, "capabilities": []}}
>> {"return": {}}
>> RAMBlock "sun4m.prom" already registered, abort!
>> Aborted (core dumped)
>>
>> $ echo "{'execute':'qmp_capabilities'}"\
>>        "{'execute':'device-list-properties',"\
>>        " 'arguments':{'typename':'macio_idreg'}}" \
>>        | sparc-softmmu/qemu-system-sparc -M SS-10 -S -qmp stdio
>> {"QMP": {"version": {"qemu": {"micro": 91, "minor": 11, "major": 2},
>>  "package": "build-all"}, "capabilities": []}}
>> {"return": {}}
>> RAMBlock "sun4m.idreg" already registered, abort!
>> Aborted (core dumped)
>>
>> $ echo "{'execute':'qmp_capabilities'}"\
>>        "{'execute':'device-list-properties',"\
>>        " 'arguments':{'typename':'tcx_afx'}}" \
>>        | sparc-softmmu/qemu-system-sparc -M SS-5 -S -qmp stdio
>> {"QMP": {"version": {"qemu": {"micro": 91, "minor": 11, "major": 2},
>>  "package": "build-all"}, "capabilities": []}}
>> {"return": {}}
>> RAMBlock "sun4m.afx" already registered, abort!
>> Aborted (core dumped)
>>
>> Fix the issues by converting the instance_init functions into realize()
>> functions instead, which are allowed to fail (and not called during
>> device introspection).
>>
>> Signed-off-by: Thomas Huth <thuth@redhat.com>
>> ---
>>  hw/sparc/sun4m.c | 67 ++++++++++++++++++++++++++++++++++++++++++--------------
>>  1 file changed, 50 insertions(+), 17 deletions(-)
>>
>> diff --git a/hw/sparc/sun4m.c b/hw/sparc/sun4m.c
>> index 6471aca..8254ec3 100644
>> --- a/hw/sparc/sun4m.c
>> +++ b/hw/sparc/sun4m.c
>> @@ -572,23 +572,36 @@ typedef struct IDRegState {
>>      MemoryRegion mem;
>>  } IDRegState;
>>
>> -static void idreg_init1(Object *obj)
>> +static void idreg_realize(DeviceState *ds, Error **errp)
>>  {
>> -    IDRegState *s = MACIO_ID_REGISTER(obj);
>> -    SysBusDevice *dev = SYS_BUS_DEVICE(obj);
>> +    IDRegState *s = MACIO_ID_REGISTER(ds);
>> +    SysBusDevice *dev = SYS_BUS_DEVICE(ds);
>> +    Error *local_err = NULL;
>> +
>> +    memory_region_init_ram_nomigrate(&s->mem, OBJECT(ds), "sun4m.idreg",
>> +                                     sizeof(idreg_data), &local_err);
>> +    if (local_err) {
>> +        error_propagate(errp, local_err);
>> +        return;
>> +    }
>>
>> -    memory_region_init_ram_nomigrate(&s->mem, obj,
>> -                           "sun4m.idreg", sizeof(idreg_data), &error_fatal);
>>      vmstate_register_ram_global(&s->mem);
>>      memory_region_set_readonly(&s->mem, true);
>>      sysbus_init_mmio(dev, &s->mem);
>>  }
>>
>> +static void idreg_class_init(ObjectClass *oc, void *data)
>> +{
>> +    DeviceClass *dc = DEVICE_CLASS(oc);
>> +
>> +    dc->realize = idreg_realize;
>> +}
>> +
>>  static const TypeInfo idreg_info = {
>>      .name          = TYPE_MACIO_ID_REGISTER,
>>      .parent        = TYPE_SYS_BUS_DEVICE,
>>      .instance_size = sizeof(IDRegState),
>> -    .instance_init = idreg_init1,
>> +    .class_init    = idreg_class_init,
>>  };
>>
>>  #define TYPE_TCX_AFX "tcx_afx"
>> @@ -613,21 +626,35 @@ static void afx_init(hwaddr addr)
>>      sysbus_mmio_map(s, 0, addr);
>>  }
>>
>> -static void afx_init1(Object *obj)
>> +static void afx_realize(DeviceState *ds, Error **errp)
>>  {
>> -    AFXState *s = TCX_AFX(obj);
>> -    SysBusDevice *dev = SYS_BUS_DEVICE(obj);
>> +    AFXState *s = TCX_AFX(ds);
>> +    SysBusDevice *dev = SYS_BUS_DEVICE(ds);
>> +    Error *local_err = NULL;
>> +
>> +    memory_region_init_ram_nomigrate(&s->mem, OBJECT(ds), "sun4m.afx", 4,
>> +                                     &local_err);
>> +    if (local_err) {
>> +        error_propagate(errp, local_err);
>> +        return;
>> +    }
>>
>> -    memory_region_init_ram_nomigrate(&s->mem, obj, "sun4m.afx", 4, &error_fatal);
>>      vmstate_register_ram_global(&s->mem);
>>      sysbus_init_mmio(dev, &s->mem);
>>  }
>>
>> +static void afx_class_init(ObjectClass *oc, void *data)
>> +{
>> +    DeviceClass *dc = DEVICE_CLASS(oc);
>> +
>> +    dc->realize = afx_realize;
>> +}
>> +
>>  static const TypeInfo afx_info = {
>>      .name          = TYPE_TCX_AFX,
>>      .parent        = TYPE_SYS_BUS_DEVICE,
>>      .instance_size = sizeof(AFXState),
>> -    .instance_init = afx_init1,
>> +    .class_init    = afx_class_init,
>>  };
>>
>>  #define TYPE_OPENPROM "openprom"
>> @@ -680,13 +707,19 @@ static void prom_init(hwaddr addr, const char *bios_name)
>>      }
>>  }
>>
>> -static void prom_init1(Object *obj)
>> +static void prom_realize(DeviceState *ds, Error **errp)
>>  {
>> -    PROMState *s = OPENPROM(obj);
>> -    SysBusDevice *dev = SYS_BUS_DEVICE(obj);
>> +    PROMState *s = OPENPROM(ds);
>> +    SysBusDevice *dev = SYS_BUS_DEVICE(ds);
>> +    Error *local_err = NULL;
>> +
>> +    memory_region_init_ram_nomigrate(&s->prom, OBJECT(ds), "sun4m.prom",
>> +                                     PROM_SIZE_MAX, &local_err);
>> +    if (local_err) {
>> +        error_propagate(errp, local_err);
>> +        return;
>> +    }
>>
>> -    memory_region_init_ram_nomigrate(&s->prom, obj, "sun4m.prom", PROM_SIZE_MAX,
>> -                           &error_fatal);
>>      vmstate_register_ram_global(&s->prom);
>>      memory_region_set_readonly(&s->prom, true);
>>      sysbus_init_mmio(dev, &s->prom);
>> @@ -701,6 +734,7 @@ static void prom_class_init(ObjectClass *klass, void *data)
>>      DeviceClass *dc = DEVICE_CLASS(klass);
>>
>>      dc->props = prom_properties;
>> +    dc->realize = prom_realize;
>>  }
>>
>>  static const TypeInfo prom_info = {
>> @@ -708,7 +742,6 @@ static const TypeInfo prom_info = {
>>      .parent        = TYPE_SYS_BUS_DEVICE,
>>      .instance_size = sizeof(PROMState),
>>      .class_init    = prom_class_init,
>> -    .instance_init = prom_init1,
>>  };
>>
>>  #define TYPE_SUN4M_MEMORY "memory"
>>
>
> Ping!

Acked-by: Artyom Tarasenko <atar4qemu@gmail.com>

Mark, can you please pick it in your tree?


-- 
Regards,
Artyom Tarasenko

SPARC and PPC PReP under qemu blog: http://tyom.blogspot.com/search/label/qemu