s390x: get rid of cpu_s390x_create()

Now that there is only one user of cpu_s390x_create() left, make cpu
creation look like on x86.
- Perform the model/properties split and checks in s390_init_cpus()
- Parse features only once without having to remember if already parsed
- Pass only the typename to s390x_new_cpu()
- Use the typename of an existing CPU for hotplug via cpu-add

Acked-by: Igor Mammedov <imammedo@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20170913132417.24384-21-david@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>

diff --git a/hw/s390x/s390-virtio-ccw.c b/hw/s390x/s390-virtio-ccw.c
index 0caf20b7191475a21e9a1d6f26ed62d60b5d6d59..fafbc6d4fe4e18742f49885b985af4591c0ab97c 100644 (file)
--- a/hw/s390x/s390-virtio-ccw.c
+++ b/hw/s390x/s390-virtio-ccw.c
@@ -55,6 +55,10 @@ S390CPU *s390_cpu_addr2state(uint16_t cpu_addr)
 static void s390_init_cpus(MachineState *machine)
 {
     MachineClass *mc = MACHINE_GET_CLASS(machine);
+    const char *typename;
+    gchar **model_pieces;
+    ObjectClass *oc;
+    CPUClass *cc;
     int i;
 
     if (machine->cpu_model == NULL) {
@@ -69,8 +73,25 @@ static void s390_init_cpus(MachineState *machine)
     /* initialize possible_cpus */
     mc->possible_cpu_arch_ids(machine);
 
+    model_pieces = g_strsplit(machine->cpu_model, ",", 2);
+    if (!model_pieces[0]) {
+        error_report("Invalid/empty CPU model name");
+        exit(1);
+    }
+
+    oc = cpu_class_by_name(TYPE_S390_CPU, model_pieces[0]);
+    if (!oc) {
+        error_report("Unable to find CPU definition: %s", model_pieces[0]);
+        exit(1);
+    }
+    typename = object_class_get_name(oc);
+    cc = CPU_CLASS(oc);
+    /* after parsing, properties will be applied to all *typename* instances */
+    cc->parse_features(typename, model_pieces[1], &error_fatal);
+    g_strfreev(model_pieces);
+
     for (i = 0; i < smp_cpus; i++) {
-        s390x_new_cpu(machine->cpu_model, i, &error_fatal);
+        s390x_new_cpu(typename, i, &error_fatal);
     }
 }
 
@@ -382,8 +403,12 @@ static HotplugHandler *s390_get_hotplug_handler(MachineState *machine,
 static void s390_hot_add_cpu(const int64_t id, Error **errp)
 {
     MachineState *machine = MACHINE(qdev_get_machine());
+    ObjectClass *oc;
+
+    g_assert(machine->possible_cpus->cpus[0].cpu);
+    oc = OBJECT_CLASS(CPU_GET_CLASS(machine->possible_cpus->cpus[0].cpu));
 
-    s390x_new_cpu(machine->cpu_model, id, errp);
+    s390x_new_cpu(object_class_get_name(oc), id, errp);
 }
 
 static void s390_nmi(NMIState *n, int cpu_index, Error **errp)

diff --git a/target/s390x/cpu.h b/target/s390x/cpu.h
index 1c8456fa57fa392563cabfafad74e7f4d58eb288..9b549dc49193a75ded0392cc6dac2a868be733fa 100644 (file)
--- a/target/s390x/cpu.h
+++ b/target/s390x/cpu.h
@@ -689,7 +689,7 @@ const char *s390_default_cpu_model_name(void);
 
 /* helper.c */
 #define cpu_init(cpu_model) cpu_generic_init(TYPE_S390_CPU, cpu_model)
-S390CPU *s390x_new_cpu(const char *cpu_model, uint32_t core_id, Error **errp);
+S390CPU *s390x_new_cpu(const char *typename, uint32_t core_id, Error **errp);
 /* you can call this signal handler from your SIGBUS and SIGSEGV
    signal handlers to inform the virtual CPU of exceptions. non zero
    is returned if the signal was handled by the virtual CPU.  */

diff --git a/target/s390x/helper.c b/target/s390x/helper.c
index dfb24ef5b20598c10e321a8fd67d71efe7ddc194..97adbcc86d0b0db1a0b0d7e2d84b8cf0d4b9f390 100644 (file)
--- a/target/s390x/helper.c
+++ b/target/s390x/helper.c
@@ -68,52 +68,11 @@ void s390x_cpu_timer(void *opaque)
 }
 #endif
 
-S390CPU *cpu_s390x_create(const char *cpu_model, Error **errp)
+S390CPU *s390x_new_cpu(const char *typename, uint32_t core_id, Error **errp)
 {
-    static bool features_parsed;
-    char *name, *features;
-    const char *typename;
-    ObjectClass *oc;
-    CPUClass *cc;
-
-    name = g_strdup(cpu_model);
-    features = strchr(name, ',');
-    if (features) {
-        features[0] = 0;
-        features++;
-    }
-
-    oc = cpu_class_by_name(TYPE_S390_CPU, name);
-    if (!oc) {
-        error_setg(errp, "Unknown CPU definition \'%s\'", name);
-        g_free(name);
-        return NULL;
-    }
-    typename = object_class_get_name(oc);
-
-    if (!features_parsed) {
-        features_parsed = true;
-        cc = CPU_CLASS(oc);
-        cc->parse_features(typename, features, errp);
-    }
-    g_free(name);
-
-    if (*errp) {
-        return NULL;
-    }
-    return S390_CPU(CPU(object_new(typename)));
-}
-
-S390CPU *s390x_new_cpu(const char *cpu_model, uint32_t core_id, Error **errp)
-{
-    S390CPU *cpu;
+    S390CPU *cpu = S390_CPU(object_new(typename));
     Error *err = NULL;
 
-    cpu = cpu_s390x_create(cpu_model, &err);
-    if (err != NULL) {
-        goto out;
-    }
-
     object_property_set_int(OBJECT(cpu), core_id, "core-id", &err);
     if (err != NULL) {
         goto out;

diff --git a/target/s390x/internal.h b/target/s390x/internal.h
index b4d3583b2438b868233344b8d5aea877b3973ed9..bc8f83129a0bc250a60c01546559d4d1640d24c2 100644 (file)
--- a/target/s390x/internal.h
+++ b/target/s390x/internal.h
@@ -337,7 +337,6 @@ uint64_t get_psw_mask(CPUS390XState *env);
 void s390_cpu_recompute_watchpoints(CPUState *cs);
 void s390x_tod_timer(void *opaque);
 void s390x_cpu_timer(void *opaque);
-S390CPU *cpu_s390x_create(const char *cpu_model, Error **errp);
 void do_restart_interrupt(CPUS390XState *env);
 #ifndef CONFIG_USER_ONLY
 LowCore *cpu_map_lowcore(CPUS390XState *env);