semihosting: Move user-only implementation out-of-line

Avoid testing CONFIG_USER_ONLY in semihost.h.
The only function that's required is semihosting_enabled.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

include/semihosting/semihost.h

@@ -26,32 +26,6 @@ typedef enum SemihostingTarget {
     SEMIHOSTING_TARGET_GDB
 } SemihostingTarget;
 
-#ifdef CONFIG_USER_ONLY
-static inline bool semihosting_enabled(bool is_user)
-{
-    return true;
-}
-
-static inline SemihostingTarget semihosting_get_target(void)
-{
-    return SEMIHOSTING_TARGET_AUTO;
-}
-
-static inline const char *semihosting_get_arg(int i)
-{
-    return NULL;
-}
-
-static inline int semihosting_get_argc(void)
-{
-    return 0;
-}
-
-static inline const char *semihosting_get_cmdline(void)
-{
-    return NULL;
-}
-#else /* !CONFIG_USER_ONLY */
 /**
  * semihosting_enabled:
  * @is_user: true if guest code is in usermode (i.e. not privileged)
@@ -59,17 +33,18 @@ static inline const char *semihosting_get_cmdline(void)
  * Return true if guest code is allowed to make semihosting calls.
  */
 bool semihosting_enabled(bool is_user);
+
 SemihostingTarget semihosting_get_target(void);
 const char *semihosting_get_arg(int i);
 int semihosting_get_argc(void);
 const char *semihosting_get_cmdline(void);
 void semihosting_arg_fallback(const char *file, const char *cmd);
+
 /* for vl.c hooks */
 void qemu_semihosting_enable(void);
 int qemu_semihosting_config_options(const char *optstr);
 void qemu_semihosting_chardev_init(void);
 void qemu_semihosting_console_init(Chardev *);
-#endif /* CONFIG_USER_ONLY */
 void qemu_semihosting_guestfd_init(void);
 
 #endif /* SEMIHOST_H */

semihosting/meson.build

@@ -7,8 +7,9 @@ specific_ss.add(when: ['CONFIG_SEMIHOSTING', 'CONFIG_SYSTEM_ONLY'], if_true: fil
   'uaccess.c',
 ))
 
-common_ss.add(when: ['CONFIG_SEMIHOSTING', 'CONFIG_SYSTEM_ONLY'], if_false: files('stubs-all.c'))
-system_ss.add(when: ['CONFIG_SEMIHOSTING'], if_true: files(
+common_ss.add(when: 'CONFIG_SEMIHOSTING', if_false: files('stubs-all.c'))
+user_ss.add(when: 'CONFIG_SEMIHOSTING', if_true: files('user.c'))
+system_ss.add(when: 'CONFIG_SEMIHOSTING', if_true: files(
   'config.c',
   'console.c',
 ), if_false: files(

semihosting/stubs-all.c

@@ -11,6 +11,12 @@
 #include "qemu/osdep.h"
 #include "semihosting/semihost.h"
 
+/* Queries to config status default to off */
+bool semihosting_enabled(bool is_user)
+{
+    return false;
+}
+
 SemihostingTarget semihosting_get_target(void)
 {
     return SEMIHOSTING_TARGET_AUTO;

semihosting/stubs-system.c

@@ -22,12 +22,6 @@ QemuOptsList qemu_semihosting_config_opts = {
     },
 };
 
-/* Queries to config status default to off */
-bool semihosting_enabled(bool is_user)
-{
-    return false;
-}
-
 /*
  * All the rest are empty subs. We could g_assert_not_reached() but
  * that adds extra weight to the final binary. Waste not want not.

semihosting/user.c

@@ -0,0 +1,20 @@
+/*
+ * Semihosting for user emulation
+ *
+ * Copyright (c) 2019 Linaro Ltd
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#include "qemu/osdep.h"
+#include "semihosting/semihost.h"
+
+bool semihosting_enabled(bool is_user)
+{
+    return true;
+}
+
+SemihostingTarget semihosting_get_target(void)
+{
+    return SEMIHOSTING_TARGET_AUTO;
+}