replace sPAPRCPUCoreClass::cpu_class with cpu type name
since it were needed just to get that at points it were
accessed.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Greg Kurz <groug@kaod.org>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
---
 include/hw/ppc/spapr_cpu_core.h |  2 +-
 hw/ppc/spapr.c                  |  6 ++----
 hw/ppc/spapr_cpu_core.c         | 13 +++++--------
 target/ppc/kvm.c                |  2 +-
 4 files changed, 9 insertions(+), 14 deletions(-)

diff --git a/include/hw/ppc/spapr_cpu_core.h b/include/hw/ppc/spapr_cpu_core.h
index 66dcf52..264ce68 100644
--- a/include/hw/ppc/spapr_cpu_core.h
+++ b/include/hw/ppc/spapr_cpu_core.h
@@ -34,7 +34,7 @@ typedef struct sPAPRCPUCore {
 
 typedef struct sPAPRCPUCoreClass {
     DeviceClass parent_class;
-    ObjectClass *cpu_class;
+    const char *cpu_type;
 } sPAPRCPUCoreClass;
 
 char *spapr_get_cpu_core_type(const char *model);
diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
index c7a0310..fda2bbe 100644
--- a/hw/ppc/spapr.c
+++ b/hw/ppc/spapr.c
@@ -3149,8 +3149,7 @@ void spapr_core_release(DeviceState *dev)
     if (smc->pre_2_10_has_unused_icps) {
         sPAPRCPUCore *sc = SPAPR_CPU_CORE(OBJECT(dev));
         sPAPRCPUCoreClass *scc = SPAPR_CPU_CORE_GET_CLASS(OBJECT(cc));
-        const char *typename = object_class_get_name(scc->cpu_class);
-        size_t size = object_type_get_instance_size(typename);
+        size_t size = object_type_get_instance_size(scc->cpu_type);
         int i;
 
         for (i = 0; i < cc->nr_threads; i++) {
@@ -3246,8 +3245,7 @@ static void spapr_core_plug(HotplugHandler *hotplug_dev, DeviceState *dev,
 
     if (smc->pre_2_10_has_unused_icps) {
         sPAPRCPUCoreClass *scc = SPAPR_CPU_CORE_GET_CLASS(OBJECT(cc));
-        const char *typename = object_class_get_name(scc->cpu_class);
-        size_t size = object_type_get_instance_size(typename);
+        size_t size = object_type_get_instance_size(scc->cpu_type);
         int i;
 
         for (i = 0; i < cc->nr_threads; i++) {
diff --git a/hw/ppc/spapr_cpu_core.c b/hw/ppc/spapr_cpu_core.c
index 550d320..a008056 100644
--- a/hw/ppc/spapr_cpu_core.c
+++ b/hw/ppc/spapr_cpu_core.c
@@ -90,8 +90,7 @@ static void spapr_cpu_core_unrealizefn(DeviceState *dev, Error **errp)
 {
     sPAPRCPUCore *sc = SPAPR_CPU_CORE(OBJECT(dev));
     sPAPRCPUCoreClass *scc = SPAPR_CPU_CORE_GET_CLASS(OBJECT(dev));
-    const char *typename = object_class_get_name(scc->cpu_class);
-    size_t size = object_type_get_instance_size(typename);
+    size_t size = object_type_get_instance_size(scc->cpu_type);
     CPUCore *cc = CPU_CORE(dev);
     int i;
 
@@ -152,8 +151,7 @@ static void spapr_cpu_core_realize(DeviceState *dev, Error **errp)
     sPAPRCPUCore *sc = SPAPR_CPU_CORE(OBJECT(dev));
     sPAPRCPUCoreClass *scc = SPAPR_CPU_CORE_GET_CLASS(OBJECT(dev));
     CPUCore *cc = CPU_CORE(OBJECT(dev));
-    const char *typename = object_class_get_name(scc->cpu_class);
-    size_t size = object_type_get_instance_size(typename);
+    size_t size = object_type_get_instance_size(scc->cpu_type);
     Error *local_err = NULL;
     void *obj;
     int i, j;
@@ -172,7 +170,7 @@ static void spapr_cpu_core_realize(DeviceState *dev, Error **errp)
 
         obj = sc->threads + i * size;
 
-        object_initialize(obj, size, typename);
+        object_initialize(obj, size, scc->cpu_type);
         cs = CPU(obj);
         cpu = POWERPC_CPU(cs);
         cs->cpu_index = cc->core_id + i;
@@ -230,14 +228,13 @@ void spapr_cpu_core_class_init(ObjectClass *oc, void *data)
     dc->realize = spapr_cpu_core_realize;
     dc->unrealize = spapr_cpu_core_unrealizefn;
     dc->props = spapr_cpu_core_properties;
-    scc->cpu_class = cpu_class_by_name(TYPE_POWERPC_CPU, data);
-    g_assert(scc->cpu_class);
+    scc->cpu_type = data;
 }
 
 #define DEFINE_SPAPR_CPU_CORE_TYPE(cpu_model) \
     {                                                   \
         .parent = TYPE_SPAPR_CPU_CORE,                  \
-        .class_data = (void *) cpu_model,               \
+        .class_data = (void *) POWERPC_CPU_TYPE_NAME(cpu_model), \
         .class_init = spapr_cpu_core_class_init,        \
         .name = SPAPR_CPU_CORE_TYPE_NAME(cpu_model),    \
     }
diff --git a/target/ppc/kvm.c b/target/ppc/kvm.c
index 171d3d8..c2152ed 100644
--- a/target/ppc/kvm.c
+++ b/target/ppc/kvm.c
@@ -2514,7 +2514,7 @@ static int kvm_ppc_register_host_cpu_type(void)
     type_info.instance_size = sizeof(sPAPRCPUCore);
     type_info.instance_init = NULL;
     type_info.class_init = spapr_cpu_core_class_init;
-    type_info.class_data = (void *) "host";
+    type_info.class_data = (void *) POWERPC_CPU_TYPE_NAME("host");
     type_register(&type_info);
     g_free((void *)type_info.name);
 #endif
-- 
2.7.4

follow up commit that registers host-spapr-cpu-core type unconditionally
 "ppc: spapr: register 'host' core type  along with the rest of core types"

makes 'non' machine crash
 ppc64-softmmu/qemu-system-ppc64 -M none -device host-spapr-cpu-core
 ERROR:qom/object.c:217:object_type_get_instance_size: assertion failed: (type != NULL)
 Aborted

before it qemu fails cleanly with
 ppc64-softmmu/qemu-system-ppc64 -M none -device host-spapr-cpu-core
 qemu-system-ppc64: -device host-spapr-cpu-core: 'host-spapr-cpu-core' is not a valid device model name

spapr_cpu_core_realize() already has explicit check for pseries machine,
so move access to host cpu type after it so 'none' machine would fail
cleanly as expected.

Reported-by: Greg Kurz <groug@kaod.org>
Signed-off-by: Igor Mammedov <imammedo@redhat.com>
---
 hw/ppc/spapr_cpu_core.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/hw/ppc/spapr_cpu_core.c b/hw/ppc/spapr_cpu_core.c
index b5bbb6a..7dbf9c3 100644
--- a/hw/ppc/spapr_cpu_core.c
+++ b/hw/ppc/spapr_cpu_core.c
@@ -151,7 +151,7 @@ static void spapr_cpu_core_realize(DeviceState *dev, Error **errp)
     sPAPRCPUCore *sc = SPAPR_CPU_CORE(OBJECT(dev));
     sPAPRCPUCoreClass *scc = SPAPR_CPU_CORE_GET_CLASS(OBJECT(dev));
     CPUCore *cc = CPU_CORE(OBJECT(dev));
-    size_t size = object_type_get_instance_size(scc->cpu_type);
+    size_t size;
     Error *local_err = NULL;
     void *obj;
     int i, j;
@@ -162,6 +162,7 @@ static void spapr_cpu_core_realize(DeviceState *dev, Error **errp)
         return;
     }
 
+    size = object_type_get_instance_size(scc->cpu_type);
     sc->threads = g_malloc0(size * cc->nr_threads);
     for (i = 0; i < cc->nr_threads; i++) {
         char id[32];
-- 
2.7.4

On Thu, 12 Oct 2017 17:48:19 +0200
Igor Mammedov <imammedo@redhat.com> wrote:

> follow up commit that registers host-spapr-cpu-core type unconditionally
>  "ppc: spapr: register 'host' core type  along with the rest of core types"
> 
> makes 'non' machine crash
>  ppc64-softmmu/qemu-system-ppc64 -M none -device host-spapr-cpu-core
>  ERROR:qom/object.c:217:object_type_get_instance_size: assertion failed: (type != NULL)
>  Aborted
> 
> before it qemu fails cleanly with
>  ppc64-softmmu/qemu-system-ppc64 -M none -device host-spapr-cpu-core
>  qemu-system-ppc64: -device host-spapr-cpu-core: 'host-spapr-cpu-core' is not a valid device model name
> 
> spapr_cpu_core_realize() already has explicit check for pseries machine,
> so move access to host cpu type after it so 'none' machine would fail
> cleanly as expected.
> 
> Reported-by: Greg Kurz <groug@kaod.org>
> Signed-off-by: Igor Mammedov <imammedo@redhat.com>
> ---

That's much simpler indeed than trying to register the host CPU type at
QOM init... which turns out to be quite hairy compared to the gain :)

>  hw/ppc/spapr_cpu_core.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/hw/ppc/spapr_cpu_core.c b/hw/ppc/spapr_cpu_core.c
> index b5bbb6a..7dbf9c3 100644
> --- a/hw/ppc/spapr_cpu_core.c
> +++ b/hw/ppc/spapr_cpu_core.c
> @@ -151,7 +151,7 @@ static void spapr_cpu_core_realize(DeviceState *dev, Error **errp)
>      sPAPRCPUCore *sc = SPAPR_CPU_CORE(OBJECT(dev));
>      sPAPRCPUCoreClass *scc = SPAPR_CPU_CORE_GET_CLASS(OBJECT(dev));
>      CPUCore *cc = CPU_CORE(OBJECT(dev));
> -    size_t size = object_type_get_instance_size(scc->cpu_type);
> +    size_t size;
>      Error *local_err = NULL;
>      void *obj;
>      int i, j;
> @@ -162,6 +162,7 @@ static void spapr_cpu_core_realize(DeviceState *dev, Error **errp)
>          return;
>      }
>  
> +    size = object_type_get_instance_size(scc->cpu_type);
>      sc->threads = g_malloc0(size * cc->nr_threads);
>      for (i = 0; i < cc->nr_threads; i++) {
>          char id[32];