qemu/target-info: Factor target_arch() out

To keep "qemu/target-info.h" self-contained to native
types, declare target_arch() -- which returns a QAPI
type -- in "qemu/target-info-qapi.h".

No logical change.

Keeping native types in "qemu/target-info.h" is necessary
to keep building tests such tests/tcg/plugins/mem.c, as
per the comment added in commit ecbcc9ead2 ("tests/tcg:
add a system test to check memory instrumentation"):

/*
 * plugins should not include anything from QEMU aside from the
 * API header. However as this is a test plugin to exercise the
 * internals of QEMU and we want to avoid needless code duplication we
 * do so here. bswap.h is pretty self-contained although it needs a
 * few things provided by compiler.h.
 */

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Message-Id: <20250708215320.70426-3-philmd@linaro.org>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

hw/core/machine-qmp-cmds.c

@@ -19,7 +19,7 @@
 #include "qapi/qobject-input-visitor.h"
 #include "qapi/type-helpers.h"
 #include "qemu/uuid.h"
-#include "qemu/target-info.h"
+#include "qemu/target-info-qapi.h"
 #include "qom/qom-qobject.h"
 #include "system/hostmem.h"
 #include "system/hw_accel.h"
@@ -37,8 +37,7 @@ CpuInfoFastList *qmp_query_cpus_fast(Error **errp)
     MachineState *ms = MACHINE(qdev_get_machine());
     MachineClass *mc = MACHINE_GET_CLASS(ms);
     CpuInfoFastList *head = NULL, **tail = &head;
-    SysEmuTarget target = qapi_enum_parse(&SysEmuTarget_lookup, target_name(),
-                                          -1, &error_abort);
+    SysEmuTarget target = target_arch();
     CPUState *cpu;
 
     CPU_FOREACH(cpu) {
@@ -139,8 +138,7 @@ QemuTargetInfo *qmp_query_target(Error **errp)
 {
     QemuTargetInfo *info = g_malloc0(sizeof(*info));
 
-    info->arch = qapi_enum_parse(&SysEmuTarget_lookup, target_name(), -1,
-                                 &error_abort);
+    info->arch = target_arch();
 
     return info;
 }

include/qemu/target-info-qapi.h

@@ -0,0 +1,21 @@
+/*
+ * QEMU target info API (returning QAPI types)
+ *
+ *  Copyright (c) Linaro
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#ifndef QEMU_TARGET_INFO_EXTRA_H
+#define QEMU_TARGET_INFO_EXTRA_H
+
+#include "qapi/qapi-types-machine.h"
+
+/**
+ * target_arch:
+ *
+ * Returns: QAPI SysEmuTarget enum (e.g. SYS_EMU_TARGET_X86_64).
+ */
+SysEmuTarget target_arch(void);
+
+#endif

include/qemu/target-info.h

@@ -1,5 +1,5 @@
 /*
- * QEMU target info API
+ * QEMU target info API (returning native types)
  *
  *  Copyright (c) Linaro
  *

target-info.c

@@ -8,7 +8,9 @@
 
 #include "qemu/osdep.h"
 #include "qemu/target-info.h"
+#include "qemu/target-info-qapi.h"
 #include "qemu/target-info-impl.h"
+#include "qapi/error.h"
 
 const char *target_name(void)
 {
@@ -20,6 +22,12 @@ unsigned target_long_bits(void)
     return target_info()->long_bits;
 }
 
+SysEmuTarget target_arch(void)
+{
+    return qapi_enum_parse(&SysEmuTarget_lookup, target_name(), -1,
+                           &error_abort);
+}
+
 const char *target_cpu_type(void)
 {
     return target_info()->cpu_type;