[Qemu-devel] [RFC 6/9] target-i386: Move CPU creation code to model name lookup function

[Eduardo Habkost <ehabkost@redhat.com>]

While moving the code, rename the resulting function from
cpu_x86_find_by_name() to x86_cpu_create_from_name().

Note that this adds duplicate object_new() and cpudef_2_x86_cpu() calls.
This is because the "host" and predefined CPU classes will be converted
in separate steps. After both parts are converted to use subclasses, we
can unify the class lookup and object creation code for both cases.

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
---
 target-i386/cpu.c | 35 ++++++++++++++++++++++++-----------
 1 file changed, 24 insertions(+), 11 deletions(-)

diff --git a/target-i386/cpu.c b/target-i386/cpu.c
index b3bd2f5..c824c08 100644
--- a/target-i386/cpu.c
+++ b/target-i386/cpu.c
@@ -1211,12 +1211,19 @@ static void cpudef_2_x86_cpu(X86CPU *cpu, x86_def_t *def, Error **errp)
     object_property_set_str(OBJECT(cpu), def->model_id, "model-id", errp);
 }
 
-static int cpu_x86_find_by_name(x86_def_t *x86_cpu_def, const char *name)
+static X86CPU *x86_cpu_create_from_name(const char *name, Error **errp)
 {
+    Error *error = NULL;
+    X86CPU *cpu = NULL;
+    x86_def_t def1, *x86_cpu_def = &def1;
+
+    memset(&def1, 0, sizeof(def1));
 
     if (kvm_enabled() && name && strcmp(name, "host") == 0) {
 #ifdef CONFIG_KVM
+        cpu = X86_CPU(object_new(TYPE_X86_CPU));
         kvm_cpu_fill_host(x86_cpu_def);
+        cpudef_2_x86_cpu(cpu, x86_cpu_def, &error);
 #endif
     } else {
         x86_def_t *def;
@@ -1228,9 +1235,11 @@ static int cpu_x86_find_by_name(x86_def_t *x86_cpu_def, const char *name)
         }
 
         if (!def) {
-            return -1;
+            error_setg(&error, "Unable to find CPU definition: %s", name);
+            goto out;
         }
 
+        cpu = X86_CPU(object_new(TYPE_X86_CPU));
         memcpy(x86_cpu_def, def, sizeof(*def));
         /* sysenter isn't supported on compatibility mode on AMD, syscall
          * isn't supported in compatibility mode on Intel.
@@ -1253,9 +1262,19 @@ static int cpu_x86_find_by_name(x86_def_t *x86_cpu_def, const char *name)
                                 &x86_cpu_def->kvm_features,
                                 &x86_cpu_def->svm_features,
                                 &x86_cpu_def->cpuid_7_0_ebx_features);
+
+        cpudef_2_x86_cpu(cpu, x86_cpu_def, &error);
     }
 
-    return 0;
+out:
+    if (error) {
+        error_propagate(errp, error);
+        if (cpu) {
+            object_delete(OBJECT(cpu));
+        }
+        return NULL;
+    }
+    return cpu;
 }
 
 /* Set features on X86CPU object based on a provide key,value list */
@@ -1502,14 +1521,11 @@ X86CPU *cpu_x86_create(const char *cpu_model, Error **errp)
 {
     X86CPU *cpu = NULL;
     CPUX86State *env;
-    x86_def_t def1, *def = &def1;
     QDict *props = NULL;
     Error *error = NULL;
     char *name, *features;
     gchar **model_pieces;
 
-    memset(def, 0, sizeof(*def));
-
     model_pieces = g_strsplit(cpu_model, ",", 2);
     if (!model_pieces[0]) {
         error_setg(&error, "Invalid/empty CPU model name");
@@ -1518,17 +1534,14 @@ X86CPU *cpu_x86_create(const char *cpu_model, Error **errp)
     name = model_pieces[0];
     features = model_pieces[1];
 
-    if (cpu_x86_find_by_name(def, name) < 0) {
-        error_setg(&error, "Unable to find CPU definition: %s", name);
+    cpu = x86_cpu_create_from_name(name, &error);
+    if (error) {
         goto out;
     }
 
-    cpu = X86_CPU(object_new(TYPE_X86_CPU));
     env = &cpu->env;
     env->cpu_model_str = cpu_model;
 
-    cpudef_2_x86_cpu(cpu, def, &error);
-
     if (cpu_x86_parse_featurestr(cpu, features, &props) < 0) {
         error_setg(&error, "Invalid cpu_model string format: %s", cpu_model);
         goto out;
-- 
1.7.11.7