[Qemu-devel] [PATCH qom-cpu-next v5] target-i386: Split command line parsing out of cpu_x86_register()

[Igor Mammedov]

From: Andreas Färber <address@hidden>

In order to instantiate a CPU subtype we will need to know which type,
so move the cpu_model splitting into cpu_x86_init().

Parameters need to be set on the X86CPU instance, so move
cpu_x86_parse_featurestr() into cpu_x86_init() as well.

This leaves cpu_x86_register() operating on the model name only.

Signed-off-by: Andreas Färber <address@hidden>
Signed-off-by: Igor Mammedov <address@hidden>
---
 v5:
  * get error to report from cpu_x86_register()
 v4:
  * consolidate resource cleanup in when leaving cpu_x86_init(),
    to avoid clean code duplication.
  * remove unnecessary error message from hw/pc.c
---
 hw/pc.c           |    1 -
 target-i386/cpu.c |   80 ++++++++++++++++++++++++++--------------------------
 2 files changed, 40 insertions(+), 41 deletions(-)

diff --git a/hw/pc.c b/hw/pc.c
index 53cc173..07caba7 100644
--- a/hw/pc.c
+++ b/hw/pc.c
@@ -876,7 +876,6 @@ void pc_cpus_init(const char *cpu_model)
 
     for (i = 0; i < smp_cpus; i++) {
         if (!cpu_x86_init(cpu_model)) {
-            fprintf(stderr, "Unable to find x86 CPU definition\n");
             exit(1);
         }
     }
diff --git a/target-i386/cpu.c b/target-i386/cpu.c
index dcbed0d..dadb0f0 100644
--- a/target-i386/cpu.c
+++ b/target-i386/cpu.c
@@ -1516,27 +1516,16 @@ static void filter_features_for_kvm(X86CPU *cpu)
 }
 #endif
 
-static int cpu_x86_register(X86CPU *cpu, const char *cpu_model)
+static void cpu_x86_register(X86CPU *cpu, const char *name, Error **errp)
 {
     CPUX86State *env = &cpu->env;
     x86_def_t def1, *def = &def1;
-    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");
-        goto out;
-    }
-    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);
-        goto out;
+        error_setg(errp, "Unable to find CPU definition: %s", name);
+        return;
     }
 
     if (kvm_enabled()) {
@@ -1544,58 +1533,69 @@ static int cpu_x86_register(X86CPU *cpu, const char 
*cpu_model)
     }
     def->ext_features |= CPUID_EXT_HYPERVISOR;
 
-    object_property_set_str(OBJECT(cpu), def->vendor, "vendor", &error);
-    object_property_set_int(OBJECT(cpu), def->level, "level", &error);
-    object_property_set_int(OBJECT(cpu), def->family, "family", &error);
-    object_property_set_int(OBJECT(cpu), def->model, "model", &error);
-    object_property_set_int(OBJECT(cpu), def->stepping, "stepping", &error);
+    object_property_set_str(OBJECT(cpu), def->vendor, "vendor", errp);
+    object_property_set_int(OBJECT(cpu), def->level, "level", errp);
+    object_property_set_int(OBJECT(cpu), def->family, "family", errp);
+    object_property_set_int(OBJECT(cpu), def->model, "model", errp);
+    object_property_set_int(OBJECT(cpu), def->stepping, "stepping", errp);
     env->cpuid_features = def->features;
     env->cpuid_ext_features = def->ext_features;
     env->cpuid_ext2_features = def->ext2_features;
     env->cpuid_ext3_features = def->ext3_features;
-    object_property_set_int(OBJECT(cpu), def->xlevel, "xlevel", &error);
+    object_property_set_int(OBJECT(cpu), def->xlevel, "xlevel", errp);
     env->cpuid_kvm_features = def->kvm_features;
     env->cpuid_svm_features = def->svm_features;
     env->cpuid_ext4_features = def->ext4_features;
     env->cpuid_7_0_ebx_features = def->cpuid_7_0_ebx_features;
     env->cpuid_xlevel2 = def->xlevel2;
 
-    object_property_set_str(OBJECT(cpu), def->model_id, "model-id", &error);
-    if (error) {
-        goto out;
-    }
-
-    cpu_x86_parse_featurestr(cpu, features, &error);
-out:
-    g_strfreev(model_pieces);
-    if (error) {
-        fprintf(stderr, "%s\n", error_get_pretty(error));
-        error_free(error);
-        return -1;
-    }
-    return 0;
+    object_property_set_str(OBJECT(cpu), def->model_id, "model-id", errp);
 }
 
 X86CPU *cpu_x86_init(const char *cpu_model)
 {
-    X86CPU *cpu;
+    X86CPU *cpu = NULL;
     CPUX86State *env;
+    gchar **model_pieces;
+    char *name, *features;
     Error *error = NULL;
 
+    model_pieces = g_strsplit(cpu_model, ",", 2);
+    if (!model_pieces[0]) {
+        error_setg(&error, "Invalid/empty CPU model name");
+        goto out;
+    }
+    name = model_pieces[0];
+    features = model_pieces[1];
+
     cpu = X86_CPU(object_new(TYPE_X86_CPU));
     env = &cpu->env;
     env->cpu_model_str = cpu_model;
 
-    if (cpu_x86_register(cpu, cpu_model) < 0) {
-        object_unref(OBJECT(cpu));
-        return NULL;
+    cpu_x86_register(cpu, name, &error);
+    if (error) {
+        goto out;
+    }
+
+    cpu_x86_parse_featurestr(cpu, features, &error);
+    if (error) {
+        goto out;
     }
 
     object_property_set_bool(OBJECT(cpu), true, "realized", &error);
     if (error) {
+        goto out;
+    }
+
+out:
+    g_strfreev(model_pieces);
+    if (error) {
+        fprintf(stderr, "%s\n", error_get_pretty(error));
         error_free(error);
-        object_unref(OBJECT(cpu));
-        return NULL;
+        if (cpu != NULL) {
+            object_unref(OBJECT(cpu));
+            cpu = NULL;
+        }
     }
     return cpu;
 }
-- 
1.7.1