qemu/target-info: Add %target_arch field to TargetInfo

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Message-Id: <20250708215320.70426-4-philmd@linaro.org>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

include/qemu/target-info-impl.h

@@ -9,11 +9,13 @@
 #ifndef QEMU_TARGET_INFO_IMPL_H
 #define QEMU_TARGET_INFO_IMPL_H
 
-#include "qemu/target-info.h"
+#include "qapi/qapi-types-machine.h"
 
 typedef struct TargetInfo {
     /* runtime equivalent of TARGET_NAME definition */
     const char *target_name;
+    /* related to TARGET_ARCH definition */
+    SysEmuTarget target_arch;
     /* runtime equivalent of TARGET_LONG_BITS definition */
     unsigned long_bits;
     /* runtime equivalent of CPU_RESOLVING_TYPE definition */

target-info-stub.c

@@ -14,6 +14,7 @@
 
 static const TargetInfo target_info_stub = {
     .target_name = TARGET_NAME,
+    .target_arch = SYS_EMU_TARGET__MAX,
     .long_bits = TARGET_LONG_BITS,
     .cpu_type = CPU_RESOLVING_TYPE,
     .machine_typename = TYPE_MACHINE,

target-info.c

@@ -24,8 +24,13 @@ unsigned target_long_bits(void)
 
 SysEmuTarget target_arch(void)
 {
-    return qapi_enum_parse(&SysEmuTarget_lookup, target_name(), -1,
-                           &error_abort);
+    SysEmuTarget arch = target_info()->target_arch;
+
+    if (arch == SYS_EMU_TARGET__MAX) {
+        arch = qapi_enum_parse(&SysEmuTarget_lookup, target_name(), -1,
+                               &error_abort);
+    }
+    return arch;
 }
 
 const char *target_cpu_type(void)