[Qemu-devel] [PATCH v4 5/5] target-i386: Require APIC ID to be explicitly set before CPU realize

[Eduardo Habkost <ehabkost@redhat.com>]

On softmuu, instead of setting APIC ID automatically when creating a
X86CPU, require the property to be set before realizing the object
(which is already done by the CPU creation code on PC).

Keep apic_id = 0 by default on *-user so it can simply create a new CPU
object and realize it without extra steps (so target-i386 will be able
to use cpu_generic_init() eventually).

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
---
 target-i386/cpu-qom.h |  2 +-
 target-i386/cpu.c     | 10 ++++++++++
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/target-i386/cpu-qom.h b/target-i386/cpu-qom.h
index 4a6f48a..31a0c1e 100644
--- a/target-i386/cpu-qom.h
+++ b/target-i386/cpu-qom.h
@@ -93,7 +93,7 @@ typedef struct X86CPU {
     bool expose_kvm;
     bool migratable;
     bool host_features;
-    uint32_t apic_id;
+    int64_t apic_id;
 
     /* if true the CPUID code directly forward host cache leaves to the guest */
     bool cache_info_passthrough;
diff --git a/target-i386/cpu.c b/target-i386/cpu.c
index 49a5e58..45700fb 100644
--- a/target-i386/cpu.c
+++ b/target-i386/cpu.c
@@ -2779,6 +2779,11 @@ static void x86_cpu_realizefn(DeviceState *dev, Error **errp)
     Error *local_err = NULL;
     static bool ht_warned;
 
+    if (cpu->apic_id < 0) {
+        error_setg(errp, "apic-id property was not initialized properly");
+        return;
+    }
+
     if (env->features[FEAT_7_0_EBX] && env->cpuid_level < 7) {
         env->cpuid_level = 7;
     }
@@ -2890,6 +2895,11 @@ static void x86_cpu_initfn(Object *obj)
 
     cpu->hyperv_spinlock_attempts = HYPERV_SPINLOCK_NEVER_RETRY;
 
+#ifndef CONFIG_USER_ONLY
+    /* Any code creating new X86CPU objects have to set apic-id explicitly */
+    cpu->apic_id = -1;
+#endif
+
     x86_cpu_load_def(cpu, xcc->cpu_def, &error_abort);
 
     /* init various static tables used in TCG mode */
-- 
2.1.0