qemu/target_info: Add target_s390x() helper

Add a helper to distinct whether the binary is targetting
S390x or not.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20260213175032.32121-3-philmd@linaro.org>

include/qemu/target-info.h

@@ -92,4 +92,11 @@ bool target_ppc(void);
  */
 bool target_ppc64(void);
 
+/**
+ * target_s390x:
+ *
+ * Returns whether the target architecture is S390x.
+ */
+bool target_s390x(void);
+
 #endif

target-info.c

@@ -88,3 +88,8 @@ bool target_ppc64(void)
 {
     return target_arch() == SYS_EMU_TARGET_PPC64;
 }
+
+bool target_s390x(void)
+{
+    return target_arch() == SYS_EMU_TARGET_S390X;
+}