| /* |
| * QEMU Module Infrastructure |
| * |
| * Copyright IBM, Corp. 2009 |
| * |
| * Authors: |
| * Anthony Liguori <aliguori@us.ibm.com> |
| * |
| * This work is licensed under the terms of the GNU GPL, version 2. See |
| * the COPYING file in the top-level directory. |
| * |
| */ |
| |
| #ifndef QEMU_MODULE_H |
| #define QEMU_MODULE_H |
| |
| |
| #define DSO_STAMP_FUN glue(qemu_stamp, CONFIG_STAMP) |
| #define DSO_STAMP_FUN_STR stringify(DSO_STAMP_FUN) |
| |
| #ifdef BUILD_DSO |
| void DSO_STAMP_FUN(void); |
| /* This is a dummy symbol to identify a loaded DSO as a QEMU module, so we can |
| * distinguish "version mismatch" from "not a QEMU module", when the stamp |
| * check fails during module loading */ |
| void qemu_module_dummy(void); |
| |
| #define module_init(function, type) \ |
| static void __attribute__((constructor)) do_qemu_init_ ## function(void) \ |
| { \ |
| register_dso_module_init(function, type); \ |
| } |
| #else |
| /* This should not be used directly. Use block_init etc. instead. */ |
| #define module_init(function, type) \ |
| static void __attribute__((constructor)) do_qemu_init_ ## function(void) \ |
| { \ |
| register_module_init(function, type); \ |
| } |
| #endif |
| |
| typedef enum { |
| MODULE_INIT_MIGRATION, |
| MODULE_INIT_BLOCK, |
| MODULE_INIT_OPTS, |
| MODULE_INIT_QOM, |
| MODULE_INIT_TRACE, |
| MODULE_INIT_XEN_BACKEND, |
| MODULE_INIT_LIBQOS, |
| MODULE_INIT_FUZZ_TARGET, |
| MODULE_INIT_MAX |
| } module_init_type; |
| |
| #define block_init(function) module_init(function, MODULE_INIT_BLOCK) |
| #define opts_init(function) module_init(function, MODULE_INIT_OPTS) |
| #define type_init(function) module_init(function, MODULE_INIT_QOM) |
| #define trace_init(function) module_init(function, MODULE_INIT_TRACE) |
| #define xen_backend_init(function) module_init(function, \ |
| MODULE_INIT_XEN_BACKEND) |
| #define libqos_init(function) module_init(function, MODULE_INIT_LIBQOS) |
| #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(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); |
| |
| /* |
| * 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); |
| |
| /** |
| * DOC: module info annotation macros |
| * |
| * ``scripts/modinfo-collect.py`` will collect module info, |
| * using the preprocessor and -DQEMU_MODINFO. |
| * |
| * ``scripts/modinfo-generate.py`` will create a module meta-data database |
| * from the collected information so qemu knows about module |
| * dependencies and QOM objects implemented by modules. |
| * |
| * See ``*.modinfo`` and ``modinfo.c`` in the build directory to check the |
| * script results. |
| */ |
| #ifdef QEMU_MODINFO |
| # define modinfo(kind, value) \ |
| MODINFO_START kind value MODINFO_END |
| #else |
| # define modinfo(kind, value) |
| #endif |
| |
| /** |
| * module_obj |
| * |
| * @name: QOM type. |
| * |
| * This module implements QOM type @name. |
| */ |
| #define module_obj(name) modinfo(obj, name) |
| |
| /** |
| * module_dep |
| * |
| * @name: module name |
| * |
| * This module depends on module @name. |
| */ |
| #define module_dep(name) modinfo(dep, name) |
| |
| /** |
| * module_arch |
| * |
| * @name: target architecture |
| * |
| * This module is for target architecture @arch. |
| * |
| * Note that target-dependent modules are tagged automatically, so |
| * this is only needed in case target-independent modules should be |
| * restricted. Use case example: the ccw bus is implemented by s390x |
| * only. |
| */ |
| #define module_arch(name) modinfo(arch, name) |
| |
| /** |
| * module_opts |
| * |
| * @name: QemuOpts name |
| * |
| * This module registers QemuOpts @name. |
| */ |
| #define module_opts(name) modinfo(opts, name) |
| |
| /** |
| * module_kconfig |
| * |
| * @name: Kconfig requirement necessary to load the module |
| * |
| * This module requires a core module that should be implemented and |
| * enabled in Kconfig. |
| */ |
| #define module_kconfig(name) modinfo(kconfig, name) |
| |
| /* |
| * module info database |
| * |
| * scripts/modinfo-generate.c will build this using the data collected |
| * by scripts/modinfo-collect.py |
| */ |
| typedef struct QemuModinfo QemuModinfo; |
| struct QemuModinfo { |
| const char *name; |
| const char *arch; |
| const char **objs; |
| const char **deps; |
| const char **opts; |
| }; |
| extern const QemuModinfo qemu_modinfo[]; |
| void module_init_info(const QemuModinfo *info); |
| |
| #endif |