[PATCH 1/2] i386: reorder call to cpu_exec_realizefn in x86_cpu_realizefn

[Claudio Fontana <cfontana@xxxxxxx>]

we need to expand features first, before we attempt to check them
in the accel realizefn code called by cpu_exec_realizefn().

At the same time we need checks for code_urev and host_cpuid_required,
and modifications to cpu->mwait to happen after the initial setting
of them inside the accel realizefn code.

Partial Fix.

Fixes: 48afe6e4eabf ("i386: split cpu accelerators from cpu.c, using AccelCPUClass")
Signed-off-by: Claudio Fontana <cfontana@xxxxxxx>
---
 target/i386/cpu.c | 56 +++++++++++++++++++++++------------------------
 1 file changed, 28 insertions(+), 28 deletions(-)

diff --git a/target/i386/cpu.c b/target/i386/cpu.c
index 9e211ac2ce..6bcb7dbc2c 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -6133,34 +6133,6 @@ static void x86_cpu_realizefn(DeviceState *dev, Error **errp)
     Error *local_err = NULL;
     static bool ht_warned;
 
-    /* Process Hyper-V enlightenments */
-    x86_cpu_hyperv_realize(cpu);
-
-    cpu_exec_realizefn(cs, &local_err);
-    if (local_err != NULL) {
-        error_propagate(errp, local_err);
-        return;
-    }
-
-    if (xcc->host_cpuid_required && !accel_uses_host_cpuid()) {
-        g_autofree char *name = x86_cpu_class_get_model_name(xcc);
-        error_setg(&local_err, "CPU model '%s' requires KVM or HVF", name);
-        goto out;
-    }
-
-    if (cpu->ucode_rev == 0) {
-        /* The default is the same as KVM's.  */
-        if (IS_AMD_CPU(env)) {
-            cpu->ucode_rev = 0x01000065;
-        } else {
-            cpu->ucode_rev = 0x100000000ULL;
-        }
-    }
-
-    /* mwait extended info: needed for Core compatibility */
-    /* We always wake on interrupt even if host does not have the capability */
-    cpu->mwait.ecx |= CPUID_MWAIT_EMX | CPUID_MWAIT_IBE;
-
     if (cpu->apic_id == UNASSIGNED_APIC_ID) {
         error_setg(errp, "apic-id property was not initialized properly");
         return;
@@ -6190,6 +6162,34 @@ static void x86_cpu_realizefn(DeviceState *dev, Error **errp)
            & CPUID_EXT2_AMD_ALIASES);
     }
 
+    /* Process Hyper-V enlightenments */
+    x86_cpu_hyperv_realize(cpu);
+
+    cpu_exec_realizefn(cs, &local_err);
+    if (local_err != NULL) {
+        error_propagate(errp, local_err);
+        return;
+    }
+
+    if (xcc->host_cpuid_required && !accel_uses_host_cpuid()) {
+        g_autofree char *name = x86_cpu_class_get_model_name(xcc);
+        error_setg(&local_err, "CPU model '%s' requires KVM or HVF", name);
+        goto out;
+    }
+
+    if (cpu->ucode_rev == 0) {
+        /* The default is the same as KVM's.  */
+        if (IS_AMD_CPU(env)) {
+            cpu->ucode_rev = 0x01000065;
+        } else {
+            cpu->ucode_rev = 0x100000000ULL;
+        }
+    }
+
+    /* mwait extended info: needed for Core compatibility */
+    /* We always wake on interrupt even if host does not have the capability */
+    cpu->mwait.ecx |= CPUID_MWAIT_EMX | CPUID_MWAIT_IBE;
+
     /* For 64bit systems think about the number of physical bits to present.
      * ideally this should be the same as the host; anything other than matching
      * the host can cause incorrect guest behaviour.
-- 
2.26.2