[Qemu-devel] [RFC v2 2/5] machine: prepare machine 'none' to gradually switch to cpu_create() API

[Igor Mammedov <imammedo@redhat.com>]

temporarily add #ifdef CPU_RESOLVING_TYPE in null-machine.c,
so that each target could gradually switch to cpu_create() and
not converted yet could continue to use cpu_init().

Once all targets are converted
   temporary ifdefs, MachineState::cpu_model and cpu_init() API
will be removed

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
---
 hw/core/null-machine.c | 13 ++++++++++++-
 vl.c                   |  8 +++++++-
 2 files changed, 19 insertions(+), 2 deletions(-)

diff --git a/hw/core/null-machine.c b/hw/core/null-machine.c
index 864832d..3cc6a49 100644
--- a/hw/core/null-machine.c
+++ b/hw/core/null-machine.c
@@ -23,10 +23,18 @@
 static void machine_none_init(MachineState *mch)
 {
     CPUState *cpu = NULL;
+#ifdef CPU_RESOLVING_TYPE
+    MachineClass *mc = MACHINE_GET_CLASS(mch);
 
-    /* Initialize CPU (if a model has been specified) */
+    /* Initialize CPU if cpu_type pointer is user provided
+     * (i.e. != to pointer tot static default cpu type string)
+     */
+    if (mch->cpu_type != mc->default_cpu_type) {
+        cpu = cpu_create(mch->cpu_type);
+#else
     if (mch->cpu_model) {
         cpu = cpu_init(mch->cpu_model);
+#endif
         if (!cpu) {
             error_report("Unable to initialize CPU");
             exit(1);
@@ -54,6 +62,9 @@ static void machine_none_machine_init(MachineClass *mc)
     mc->init = machine_none_init;
     mc->max_cpus = 1;
     mc->default_ram_size = 0;
+#ifdef CPU_RESOLVING_TYPE
+    mc->default_cpu_type = CPU_RESOLVING_TYPE;
+#endif
 }
 
 DEFINE_MACHINE("none", machine_none_machine_init)
diff --git a/vl.c b/vl.c
index 2586f25..8aa0131 100644
--- a/vl.c
+++ b/vl.c
@@ -4609,7 +4609,6 @@ int main(int argc, char **argv, char **envp)
     current_machine->maxram_size = maxram_size;
     current_machine->ram_slots = ram_slots;
     current_machine->boot_order = boot_order;
-    current_machine->cpu_model = cpu_model;
 
     parse_numa_opts(current_machine);
 
@@ -4619,6 +4618,13 @@ int main(int argc, char **argv, char **envp)
         if (cpu_model) {
             current_machine->cpu_type =
                 cpu_parse_cpu_model(machine_class->default_cpu_type, cpu_model);
+
+            /* machine 'none' depends on default cpu type pointer not being
+             * equal to resolved type name pointer to fugure out if type was
+             * user provided, make sure that if it becomes not true in future
+             * it won't beark silently */
+            g_assert(
+                current_machine->cpu_type != machine_class->default_cpu_type);
         }
     }
 
-- 
2.7.4