Merge tag 'for-upstream' of https://gitlab.com/bonzini/qemu into staging

* bug fixes for Win32 event loop
* bug fixes for -Wextra
* fix gdb XML for 32-bit x86
* improve error handling for module load

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# gpg:                using RSA key F13338574B662389866C7682BFFBD25F78C7AE83
# gpg:                issuer "pbonzini@redhat.com"
# gpg: Good signature from "Paolo Bonzini <bonzini@gnu.org>" [full]
# gpg:                 aka "Paolo Bonzini <pbonzini@redhat.com>" [full]
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* tag 'for-upstream' of https://gitlab.com/bonzini/qemu:
  accel: abort if we fail to load the accelerator plugin
  dmg: warn when opening dmg images containing blocks of unknown type
  module: add Error arguments to module_load and module_load_qom
  module: rename module_load_one to module_load
  module: removed unused function argument "mayfail"
  Add missing include statement for global xml_builtin
  meson: avoid unused arguments of main() in compiler tests
  Fix broken configure with -Wunused-parameter
  gdb-xml: Fix size of EFER register on i386 architecture when debugged by GDB
  util/aio-win32: Correct the event array size in aio_poll()
  util/main-loop: Avoid adding the same HANDLE twice
  util/main-loop: Fix maximum number of wait objects for win32

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

2 files changed, 34 insertions, 5 deletions

diff --git a/include/qemu/main-loop.h b/include/qemu/main-loop.h
index aac707d073..3c9a9a982d 100644
--- a/include/qemu/main-loop.h
+++ b/include/qemu/main-loop.h
@@ -157,6 +157,8 @@ typedef void WaitObjectFunc(void *opaque);
  * in the main loop's calls to WaitForMultipleObjects.  When the handle
  * is in a signaled state, QEMU will call @func.
  *
+ * If the same HANDLE is added twice, this function returns -1.
+ *
  * @handle: The Windows handle to be observed.
  * @func: A function to be called when @handle is in a signaled state.
  * @opaque: A pointer-size value that is passed to @func.
diff --git a/include/qemu/module.h b/include/qemu/module.h
index bd73607104..c37ce74b16 100644
--- a/include/qemu/module.h
+++ b/include/qemu/module.h
@@ -61,16 +61,43 @@ typedef enum {
 #define fuzz_target_init(function) module_init(function, \
                                                MODULE_INIT_FUZZ_TARGET)
 #define migration_init(function) module_init(function, MODULE_INIT_MIGRATION)
-#define block_module_load_one(lib) module_load_one("block-", lib, false)
-#define ui_module_load_one(lib) module_load_one("ui-", lib, false)
-#define audio_module_load_one(lib) module_load_one("audio-", lib, false)
+#define block_module_load(lib, errp) module_load("block-", lib, errp)
+#define ui_module_load(lib, errp) module_load("ui-", lib, errp)
+#define audio_module_load(lib, errp) module_load("audio-", lib, errp)
 
 void register_module_init(void (*fn)(void), module_init_type type);
 void register_dso_module_init(void (*fn)(void), module_init_type type);
 
 void module_call_init(module_init_type type);
-bool module_load_one(const char *prefix, const char *lib_name, bool mayfail);
-void module_load_qom_one(const char *type);
+
+/*
+ * module_load: attempt to load a module from a set of directories
+ *
+ * directories searched are:
+ * - getenv("QEMU_MODULE_DIR")
+ * - get_relocated_path(CONFIG_QEMU_MODDIR);
+ * - /var/run/qemu/${version_dir}
+ *
+ * prefix:         a subsystem prefix, or the empty string ("audio-", ..., "")
+ * name:           name of the module
+ * errp:           error to set in case the module is found, but load failed.
+ *
+ * Return value:   -1 on error (errp set if not NULL).
+ *                 0 if module or one of its dependencies are not installed,
+ *                 1 if the module is found and loaded,
+ *                 2 if the module is already loaded, or module is built-in.
+ */
+int module_load(const char *prefix, const char *name, Error **errp);
+
+/*
+ * module_load_qom: attempt to load a module to provide a QOM type
+ *
+ * type:           the type to be provided
+ * errp:           error to set.
+ *
+ * Return value:   as per module_load.
+ */
+int module_load_qom(const char *type, Error **errp);
 void module_load_qom_all(void);
 void module_allow_arch(const char *arch);