hw/core/machine: Constify MachineClass::valid_cpu_types[]

Constify MachineClass::valid_cpu_types[i], as suggested by Richard
Henderson.

Suggested-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Gavin Shan <gshan@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-id: 20231117071704.35040-2-philmd@linaro.org
[PMD: Constify HPPA machines,
      restrict valid_cpu_types to machine_class_init() handlers]
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

hw/hppa/machine.c

@@ -672,19 +672,18 @@ static void hppa_nmi(NMIState *n, int cpu_index, Error **errp)
     }
 }
 
-static const char *HP_B160L_machine_valid_cpu_types[] = {
-    TYPE_HPPA_CPU,
-    NULL
-};
-
 static void HP_B160L_machine_init_class_init(ObjectClass *oc, void *data)
 {
+    static const char * const valid_cpu_types[] = {
+        TYPE_HPPA_CPU,
+        NULL
+    };
     MachineClass *mc = MACHINE_CLASS(oc);
     NMIClass *nc = NMI_CLASS(oc);
 
     mc->desc = "HP B160L workstation";
     mc->default_cpu_type = TYPE_HPPA_CPU;
-    mc->valid_cpu_types = HP_B160L_machine_valid_cpu_types;
+    mc->valid_cpu_types = valid_cpu_types;
     mc->init = machine_HP_B160L_init;
     mc->reset = hppa_machine_reset;
     mc->block_default_type = IF_SCSI;
@@ -709,19 +708,18 @@ static const TypeInfo HP_B160L_machine_init_typeinfo = {
     },
 };
 
-static const char *HP_C3700_machine_valid_cpu_types[] = {
-    TYPE_HPPA64_CPU,
-    NULL
-};
-
 static void HP_C3700_machine_init_class_init(ObjectClass *oc, void *data)
 {
+    static const char * const valid_cpu_types[] = {
+        TYPE_HPPA64_CPU,
+        NULL
+    };
     MachineClass *mc = MACHINE_CLASS(oc);
     NMIClass *nc = NMI_CLASS(oc);
 
     mc->desc = "HP C3700 workstation";
     mc->default_cpu_type = TYPE_HPPA64_CPU;
-    mc->valid_cpu_types = HP_C3700_machine_valid_cpu_types;
+    mc->valid_cpu_types = valid_cpu_types;
     mc->init = machine_HP_C3700_init;
     mc->reset = hppa_machine_reset;
     mc->block_default_type = IF_SCSI;

hw/m68k/q800.c

@@ -726,19 +726,18 @@ static GlobalProperty hw_compat_q800[] = {
 };
 static const size_t hw_compat_q800_len = G_N_ELEMENTS(hw_compat_q800);
 
-static const char *q800_machine_valid_cpu_types[] = {
-    M68K_CPU_TYPE_NAME("m68040"),
-    NULL
-};
-
 static void q800_machine_class_init(ObjectClass *oc, void *data)
 {
+    static const char * const valid_cpu_types[] = {
+        M68K_CPU_TYPE_NAME("m68040"),
+        NULL
+    };
     MachineClass *mc = MACHINE_CLASS(oc);
 
     mc->desc = "Macintosh Quadra 800";
     mc->init = q800_machine_init;
     mc->default_cpu_type = M68K_CPU_TYPE_NAME("m68040");
-    mc->valid_cpu_types = q800_machine_valid_cpu_types;
+    mc->valid_cpu_types = valid_cpu_types;
     mc->max_cpus = 1;
     mc->block_default_type = IF_SCSI;
     mc->default_ram_id = "m68k_mac.ram";

include/hw/boards.h

@@ -273,7 +273,7 @@ struct MachineClass {
     bool has_hotpluggable_cpus;
     bool ignore_memory_transaction_failures;
     int numa_mem_align_shift;
-    const char **valid_cpu_types;
+    const char * const *valid_cpu_types;
     strList *allowed_dynamic_sysbus_devices;
     bool auto_enable_numa_with_memhp;
     bool auto_enable_numa_with_memdev;