1 files changed, 57 insertions, 9 deletions

diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index cd1745e..f56e225 100644
--- 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));
@@ -1147,6 +1166,34 @@ void pc_cpus_init(PCMachineState *pcms)
     smbios_set_cpuid(cpu->env.cpuid_version, cpu->env.features[FEAT_1_EDX]);
 }
 
+static void pc_build_feature_control_file(PCMachineState *pcms)
+{
+    X86CPU *cpu = X86_CPU(pcms->possible_cpus->cpus[0].cpu);
+    CPUX86State *env = &cpu->env;
+    uint32_t unused, ecx, edx;
+    uint64_t feature_control_bits = 0;
+    uint64_t *val;
+
+    cpu_x86_cpuid(env, 1, 0, &unused, &unused, &ecx, &edx);
+    if (ecx & CPUID_EXT_VMX) {
+        feature_control_bits |= FEATURE_CONTROL_VMXON_ENABLED_OUTSIDE_SMX;
+    }
+
+    if ((edx & (CPUID_EXT2_MCE | CPUID_EXT2_MCA)) ==
+        (CPUID_EXT2_MCE | CPUID_EXT2_MCA) &&
+        (env->mcg_cap & MCG_LMCE_P)) {
+        feature_control_bits |= FEATURE_CONTROL_LMCE;
+    }
+
+    if (!feature_control_bits) {
+        return;
+    }
+
+    val = g_malloc(sizeof(*val));
+    *val = cpu_to_le64(feature_control_bits | FEATURE_CONTROL_LOCKED);
+    fw_cfg_add_file(pcms->fw_cfg, "etc/msr_feature_control", val, sizeof(*val));
+}
+
 static
 void pc_machine_done(Notifier *notifier, void *data)
 {
@@ -1174,6 +1221,7 @@ void pc_machine_done(Notifier *notifier, void *data)
     acpi_setup();
     if (pcms->fw_cfg) {
         pc_build_smbios(pcms->fw_cfg);
+        pc_build_feature_control_file(pcms);
     }
 }