pc: Parse CPU features only once

Considering that features are converted to global properties and
global properties are automatically applied to every new instance
of created CPU (at object_new() time), there is no point in
parsing cpu_model string every time a CPU created. So move
parsing outside CPU creation loop and do it only once.

Parsing also should be done before any CPU is created so that
features would affect the first CPU a well.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>

diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index cd1745ebaf848b03b5bf0b374018eba0db589ed1..d0df3c1013c29c951501131147a840053e2dedd6 100644 (file)
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -1039,21 +1039,17 @@ void pc_acpi_smi_interrupt(void *opaque, int irq, int level)
     }
 }
 
-static X86CPU *pc_new_cpu(const char *cpu_model, int64_t apic_id,
+static X86CPU *pc_new_cpu(const char *typename, int64_t apic_id,
                           Error **errp)
 {
     X86CPU *cpu = NULL;
     Error *local_err = NULL;
 
-    cpu = cpu_x86_create(cpu_model, &local_err);
-    if (local_err != NULL) {
-        goto out;
-    }
+    cpu = X86_CPU(object_new(typename));
 
     object_property_set_int(OBJECT(cpu), apic_id, "apic-id", &local_err);
     object_property_set_bool(OBJECT(cpu), true, "realized", &local_err);
 
-out:
     if (local_err) {
         error_propagate(errp, local_err);
         object_unref(OBJECT(cpu));
@@ -1065,7 +1061,8 @@ out:
 void pc_hot_add_cpu(const int64_t id, Error **errp)
 {
     X86CPU *cpu;
-    MachineState *machine = MACHINE(qdev_get_machine());
+    ObjectClass *oc;
+    PCMachineState *pcms = PC_MACHINE(qdev_get_machine());
     int64_t apic_id = x86_cpu_apic_id_from_index(id);
     Error *local_err = NULL;
 
@@ -1093,7 +1090,9 @@ void pc_hot_add_cpu(const int64_t id, Error **errp)
         return;
     }
 
-    cpu = pc_new_cpu(machine->cpu_model, apic_id, &local_err);
+    assert(pcms->possible_cpus->cpus[0].cpu); /* BSP is always present */
+    oc = OBJECT_CLASS(CPU_GET_CLASS(pcms->possible_cpus->cpus[0].cpu));
+    cpu = pc_new_cpu(object_class_get_name(oc), apic_id, &local_err);
     if (local_err) {
         error_propagate(errp, local_err);
         return;
@@ -1104,6 +1103,10 @@ void pc_hot_add_cpu(const int64_t id, Error **errp)
 void pc_cpus_init(PCMachineState *pcms)
 {
     int i;
+    CPUClass *cc;
+    ObjectClass *oc;
+    const char *typename;
+    gchar **model_pieces;
     X86CPU *cpu = NULL;
     MachineState *machine = MACHINE(pcms);
 
@@ -1116,6 +1119,22 @@ void pc_cpus_init(PCMachineState *pcms)
 #endif
     }
 
+    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_X86_CPU, model_pieces[0]);
+    if (oc == NULL) {
+        error_report("Unable to find CPU definition: %s", model_pieces[0]);
+        exit(1);
+    }
+    typename = object_class_get_name(oc);
+    cc = CPU_CLASS(oc);
+    cc->parse_features(typename, model_pieces[1], &error_fatal);
+    g_strfreev(model_pieces);
+
     /* Calculates the limit to CPU APIC ID values
      *
      * Limit for the APIC ID value, so that all
@@ -1136,7 +1155,7 @@ void pc_cpus_init(PCMachineState *pcms)
         pcms->possible_cpus->cpus[i].arch_id = x86_cpu_apic_id_from_index(i);
         pcms->possible_cpus->len++;
         if (i < smp_cpus) {
-            cpu = pc_new_cpu(machine->cpu_model, x86_cpu_apic_id_from_index(i),
+            cpu = pc_new_cpu(typename, x86_cpu_apic_id_from_index(i),
                              &error_fatal);
             pcms->possible_cpus->cpus[i].cpu = CPU(cpu);
             object_unref(OBJECT(cpu));

diff --git a/qom/cpu.c b/qom/cpu.c
index f884a666a18e587d8652d6bfcabf985ef3a52b98..a9727a1e64ea2dd9c3ce505ac943b0f6497bcc0c 100644 (file)
--- a/qom/cpu.c
+++ b/qom/cpu.c
@@ -297,7 +297,6 @@ static void cpu_common_parse_features(const char *typename, char *features,
      * to assert(!cpu_globals_initialized).
      * Current callers of ->parse_features() are:
      * - cpu_generic_init()
-     * - cpu_x86_create()
      */
     if (cpu_globals_initialized) {
         return;

diff --git a/target-i386/cpu.c b/target-i386/cpu.c
index 16977d54041f5fd455f56cd01d2eb36a5464b696..80e1767fe01af5901fafd03717d8284a997f8da1 100644 (file)
--- a/target-i386/cpu.c
+++ b/target-i386/cpu.c
@@ -2209,50 +2209,6 @@ static void x86_cpu_load_def(X86CPU *cpu, X86CPUDefinition *def, Error **errp)
 
 }
 
-X86CPU *cpu_x86_create(const char *cpu_model, Error **errp)
-{
-    X86CPU *cpu = NULL;
-    ObjectClass *oc;
-    CPUClass *cc;
-    gchar **model_pieces;
-    char *name, *features;
-    Error *error = NULL;
-    const char *typename;
-
-    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];
-
-    oc = x86_cpu_class_by_name(name);
-    if (oc == NULL) {
-        error_setg(&error, "Unable to find CPU definition: %s", name);
-        goto out;
-    }
-    cc = CPU_CLASS(oc);
-    typename = object_class_get_name(oc);
-
-    cc->parse_features(typename, features, &error);
-    cpu = X86_CPU(object_new(typename));
-    if (error) {
-        goto out;
-    }
-
-out:
-    if (error != NULL) {
-        error_propagate(errp, error);
-        if (cpu) {
-            object_unref(OBJECT(cpu));
-            cpu = NULL;
-        }
-    }
-    g_strfreev(model_pieces);
-    return cpu;
-}
-
 X86CPU *cpu_x86_init(const char *cpu_model)
 {
     return X86_CPU(cpu_generic_init(TYPE_X86_CPU, cpu_model));

diff --git a/target-i386/cpu.h b/target-i386/cpu.h
index 474b0b937d71bde36d5dd2f2c3050f1950ea0fc5..738958e0d515a5a7d11c216c86cf3f5b6479a024 100644 (file)
--- a/target-i386/cpu.h
+++ b/target-i386/cpu.h
@@ -1234,7 +1234,6 @@ void x86_cpu_exec_enter(CPUState *cpu);
 void x86_cpu_exec_exit(CPUState *cpu);
 
 X86CPU *cpu_x86_init(const char *cpu_model);
-X86CPU *cpu_x86_create(const char *cpu_model, Error **errp);
 void x86_cpu_list(FILE *f, fprintf_function cpu_fprintf);
 int cpu_x86_support_mca_broadcast(CPUX86State *env);