[Qemu-devel] [PATCH 13/29] target-i386: Introduce apic-id CPU property

["Andreas Färber" <afaerber@suse.de>]

From: Igor Mammedov <imammedo@redhat.com>

The property is used from board level to set APIC ID for CPUs it
creates. Do so in a new pc_new_cpu() helper, to be reused for hot-plug.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
---
 hw/i386/pc.c      | 29 ++++++++++++++++++++++++++++-
 target-i386/cpu.c | 40 ++++++++++++++++++++++++++++++++++++++++
 2 files changed, 68 insertions(+), 1 deletion(-)

diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index 867add7..6568173 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -894,9 +894,33 @@ void pc_acpi_smi_interrupt(void *opaque, int irq, int level)
     }
 }
 
+static X86CPU *pc_new_cpu(const char *cpu_model, int64_t apic_id, Error **errp)
+{
+    X86CPU *cpu;
+    Error *local_err = NULL;
+
+    cpu = cpu_x86_create(cpu_model, errp);
+    if (!cpu) {
+        return cpu;
+    }
+
+    object_property_set_int(OBJECT(cpu), apic_id, "apic-id", &local_err);
+    object_property_set_bool(OBJECT(cpu), true, "realized", &local_err);
+
+    if (local_err) {
+        if (cpu != NULL) {
+            object_unref(OBJECT(cpu));
+            cpu = NULL;
+        }
+        error_propagate(errp, local_err);
+    }
+    return cpu;
+}
+
 void pc_cpus_init(const char *cpu_model)
 {
     int i;
+    Error *error = NULL;
 
     /* init CPUs */
     if (cpu_model == NULL) {
@@ -908,7 +932,10 @@ void pc_cpus_init(const char *cpu_model)
     }
 
     for (i = 0; i < smp_cpus; i++) {
-        if (!cpu_x86_init(cpu_model)) {
+        pc_new_cpu(cpu_model, x86_cpu_apic_id_from_index(i), &error);
+        if (error) {
+            fprintf(stderr, "%s\n", error_get_pretty(error));
+            error_free(error);
             exit(1);
         }
     }
diff --git a/target-i386/cpu.c b/target-i386/cpu.c
index 697848d..f1cecc0 100644
--- a/target-i386/cpu.c
+++ b/target-i386/cpu.c
@@ -1271,6 +1271,43 @@ static void x86_cpuid_set_tsc_freq(Object *obj, Visitor *v, void *opaque,
     cpu->env.tsc_khz = value / 1000;
 }
 
+static void x86_cpuid_get_apic_id(Object *obj, Visitor *v, void *opaque,
+                                  const char *name, Error **errp)
+{
+    X86CPU *cpu = X86_CPU(obj);
+    int64_t value = cpu->env.cpuid_apic_id;
+
+    visit_type_int(v, &value, name, errp);
+}
+
+static void x86_cpuid_set_apic_id(Object *obj, Visitor *v, void *opaque,
+                                  const char *name, Error **errp)
+{
+    X86CPU *cpu = X86_CPU(obj);
+    const int64_t min = 0;
+    const int64_t max = UINT32_MAX;
+    Error *error = NULL;
+    int64_t value;
+
+    visit_type_int(v, &value, name, &error);
+    if (error) {
+        error_propagate(errp, error);
+        return;
+    }
+    if (value < min || value > max) {
+        error_setg(errp, "Property %s.%s doesn't take value %" PRId64
+                   " (minimum: %" PRId64 ", maximum: %" PRId64 ")" ,
+                   object_get_typename(obj), name, value, min, max);
+        return;
+    }
+
+    if ((value != cpu->env.cpuid_apic_id) && cpu_exists(value)) {
+        error_setg(errp, "CPU with APIC ID %" PRIi64 " exists", value);
+        return;
+    }
+    cpu->env.cpuid_apic_id = value;
+}
+
 static int cpu_x86_find_by_name(x86_def_t *x86_cpu_def, const char *name)
 {
     x86_def_t *def;
@@ -2270,6 +2307,9 @@ static void x86_cpu_initfn(Object *obj)
     object_property_add(obj, "tsc-frequency", "int",
                         x86_cpuid_get_tsc_freq,
                         x86_cpuid_set_tsc_freq, NULL, NULL, NULL);
+    object_property_add(obj, "apic-id", "int",
+                        x86_cpuid_get_apic_id,
+                        x86_cpuid_set_apic_id, NULL, NULL, NULL);
 
     env->cpuid_apic_id = x86_cpu_apic_id_from_index(cs->cpu_index);
 
-- 
1.8.1.4