Replace the static array returned as MachineClass::valid_cpu_types[]
by a runtime one generated by MachineClass::get_valid_cpu_types()
once the machine is created (its options being processed).

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
---
FIXME: Richard comment:
>>> Why do these need to be strdup'ed?
>> g_slist_prepend() expects non-const.
>In a few patches this become a run-time check:
>  if (target_aarch64()) {
>    ...
>  }

FIXME: Pierrick comment:
> It seems it would be more easy if get_valid_cpu_types simply return a const* char* const (same as existing valid_cpu_types), and caller does not have the responsibility to free it.
> This way, the list can be built either with a static array initializer, or with a dynamic GPtrArray, that we keep under a local static variable, so it has to be built only once. We can debate the leak introduced but I don't think it's really a problem.
---
 hw/arm/virt.c | 59 ++++++++++++++++++++++++++++-----------------------
 1 file changed, 32 insertions(+), 27 deletions(-)

diff --git a/hw/arm/virt.c b/hw/arm/virt.c
index 20e3f1094cb..e19da6fd901 100644
--- a/hw/arm/virt.c
+++ b/hw/arm/virt.c
@@ -3256,36 +3256,41 @@ static int virt_hvf_get_physical_address_range(MachineState *ms)
     return requested_ipa_size;
 }
 
+static GPtrArray *virt_get_valid_cpu_types(const MachineState *ms)
+{
+    GPtrArray *vct = g_ptr_array_new_with_free_func(g_free);
+
+#ifdef CONFIG_TCG
+        g_ptr_array_add(vct, g_strdup(ARM_CPU_TYPE_NAME("cortex-a7")));
+        g_ptr_array_add(vct, g_strdup(ARM_CPU_TYPE_NAME("cortex-a15")));
+#ifdef TARGET_AARCH64
+        g_ptr_array_add(vct, g_strdup(ARM_CPU_TYPE_NAME("cortex-a35")));
+        g_ptr_array_add(vct, g_strdup(ARM_CPU_TYPE_NAME("cortex-a55")));
+        g_ptr_array_add(vct, g_strdup(ARM_CPU_TYPE_NAME("cortex-a72")));
+        g_ptr_array_add(vct, g_strdup(ARM_CPU_TYPE_NAME("cortex-a76")));
+        g_ptr_array_add(vct, g_strdup(ARM_CPU_TYPE_NAME("cortex-a710")));
+        g_ptr_array_add(vct, g_strdup(ARM_CPU_TYPE_NAME("a64fx")));
+        g_ptr_array_add(vct, g_strdup(ARM_CPU_TYPE_NAME("neoverse-n1")));
+        g_ptr_array_add(vct, g_strdup(ARM_CPU_TYPE_NAME("neoverse-v1")));
+        g_ptr_array_add(vct, g_strdup(ARM_CPU_TYPE_NAME("neoverse-n2")));
+#endif /* TARGET_AARCH64 */
+#endif /* CONFIG_TCG */
+#ifdef TARGET_AARCH64
+        g_ptr_array_add(vct, g_strdup(ARM_CPU_TYPE_NAME("cortex-a53")));
+        g_ptr_array_add(vct, g_strdup(ARM_CPU_TYPE_NAME("cortex-a57")));
+#if defined(CONFIG_KVM) || defined(CONFIG_HVF)
+            g_ptr_array_add(vct, g_strdup(ARM_CPU_TYPE_NAME("host")));
+#endif /* CONFIG_KVM || CONFIG_HVF */
+#endif /* TARGET_AARCH64 */
+    g_ptr_array_add(vct, g_strdup(ARM_CPU_TYPE_NAME("max")));
+
+    return vct;
+}
+
 static void virt_machine_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(oc);
-    static const char * const valid_cpu_types[] = {
-#ifdef CONFIG_TCG
-        ARM_CPU_TYPE_NAME("cortex-a7"),
-        ARM_CPU_TYPE_NAME("cortex-a15"),
-#ifdef TARGET_AARCH64
-        ARM_CPU_TYPE_NAME("cortex-a35"),
-        ARM_CPU_TYPE_NAME("cortex-a55"),
-        ARM_CPU_TYPE_NAME("cortex-a72"),
-        ARM_CPU_TYPE_NAME("cortex-a76"),
-        ARM_CPU_TYPE_NAME("cortex-a710"),
-        ARM_CPU_TYPE_NAME("a64fx"),
-        ARM_CPU_TYPE_NAME("neoverse-n1"),
-        ARM_CPU_TYPE_NAME("neoverse-v1"),
-        ARM_CPU_TYPE_NAME("neoverse-n2"),
-#endif /* TARGET_AARCH64 */
-#endif /* CONFIG_TCG */
-#ifdef TARGET_AARCH64
-        ARM_CPU_TYPE_NAME("cortex-a53"),
-        ARM_CPU_TYPE_NAME("cortex-a57"),
-#if defined(CONFIG_KVM) || defined(CONFIG_HVF)
-        ARM_CPU_TYPE_NAME("host"),
-#endif /* CONFIG_KVM || CONFIG_HVF */
-#endif /* TARGET_AARCH64 */
-        ARM_CPU_TYPE_NAME("max"),
-        NULL
-    };
 
     mc->init = machvirt_init;
     /* Start with max_cpus set to 512, which is the maximum supported by KVM.
@@ -3311,7 +3316,7 @@ static void virt_machine_class_init(ObjectClass *oc, const void *data)
 #else
     mc->default_cpu_type = ARM_CPU_TYPE_NAME("max");
 #endif
-    mc->valid_cpu_types = valid_cpu_types;
+    mc->get_valid_cpu_types = virt_get_valid_cpu_types;
     mc->get_default_cpu_node_id = virt_get_default_cpu_node_id;
     mc->kvm_type = virt_kvm_type;
     mc->hvf_get_physical_address_range = virt_hvf_get_physical_address_range;
-- 
2.51.0