When compiling devices as modules we'll need some infrastrtucture to actually load those modules if needed. This patch adds it.
Signed-off-by: Gerd Hoffmann <[email protected]> --- include/hw/qdev-core.h | 3 +++ include/qemu/module.h | 1 + hw/core/qdev.c | 50 ++++++++++++++++++++++++++++++++++++++++++ qdev-monitor.c | 5 +++++ qom/qom-qmp-cmds.c | 1 + stubs/hw-module.c | 6 +++++ stubs/Makefile.objs | 1 + 7 files changed, 67 insertions(+) create mode 100644 stubs/hw-module.c diff --git a/include/hw/qdev-core.h b/include/hw/qdev-core.h index b870b279661a..a96c890bb95b 100644 --- a/include/hw/qdev-core.h +++ b/include/hw/qdev-core.h @@ -552,4 +552,7 @@ void device_listener_unregister(DeviceListener *listener); */ bool qdev_should_hide_device(QemuOpts *opts); +void qdev_module_load_type(const char *type); +void qdev_module_load_all(void); + #endif diff --git a/include/qemu/module.h b/include/qemu/module.h index 011ae1ae7605..077a6b09bca7 100644 --- a/include/qemu/module.h +++ b/include/qemu/module.h @@ -64,6 +64,7 @@ typedef enum { #define block_module_load_one(lib) module_load_one("block-", lib) #define ui_module_load_one(lib) module_load_one("ui-", lib) #define audio_module_load_one(lib) module_load_one("audio-", lib) +#define hw_module_load_one(lib) module_load_one("hw-", lib) void register_module_init(void (*fn)(void), module_init_type type); void register_dso_module_init(void (*fn)(void), module_init_type type); diff --git a/hw/core/qdev.c b/hw/core/qdev.c index 9e5538aeaebd..7177798840d4 100644 --- a/hw/core/qdev.c +++ b/hw/core/qdev.c @@ -146,10 +146,60 @@ DeviceState *qdev_create(BusState *bus, const char *name) return dev; } +/* + * Building devices modular is mostly useful in case they have + * dependencies to external libraries. Which is the case for very few + * devices. So with the expecration that this will be rather the + * exception than to rule go with a simple hardcoded list for now ... + */ +static struct { + const char *type; + const char *mod; +} const hwmodules[] = { +}; + +static bool qdev_module_loaded_all; + +void qdev_module_load_type(const char *type) +{ + int i; + + if (qdev_module_loaded_all) { + return; + } + for (i = 0; i < ARRAY_SIZE(hwmodules); i++) { + if (strcmp(hwmodules[i].type, type) == 0) { + hw_module_load_one(hwmodules[i].mod); + return; + } + } +} + +void qdev_module_load_all(void) +{ + int i; + + if (qdev_module_loaded_all) { + return; + } + for (i = 0; i < ARRAY_SIZE(hwmodules); i++) { + if (i > 0 && strcmp(hwmodules[i - 1].mod, + hwmodules[i].mod) == 0) { + /* one module implementing multiple devices -> load only once */ + continue; + } + hw_module_load_one(hwmodules[i].mod); + } + qdev_module_loaded_all = true; +} + DeviceState *qdev_try_create(BusState *bus, const char *type) { DeviceState *dev; + if (object_class_by_name(type) == NULL) { + qdev_module_load_type(type); + } if (object_class_by_name(type) == NULL) { return NULL; } diff --git a/qdev-monitor.c b/qdev-monitor.c index a4735d3bb190..55dddeb2f978 100644 --- a/qdev-monitor.c +++ b/qdev-monitor.c @@ -147,6 +147,7 @@ static void qdev_print_devinfos(bool show_no_user) int i; bool cat_printed; + qdev_module_load_all(); list = object_class_get_list_sorted(TYPE_DEVICE, false); for (i = 0; i <= DEVICE_CATEGORY_MAX; i++) { @@ -224,6 +225,10 @@ static DeviceClass *qdev_get_device_class(const char **driver, Error **errp) oc = object_class_by_name(*driver); } } + if (!oc) { + qdev_module_load_type(*driver); + oc = object_class_by_name(*driver); + } if (!object_class_dynamic_cast(oc, TYPE_DEVICE)) { if (*driver != original_name) { diff --git a/qom/qom-qmp-cmds.c b/qom/qom-qmp-cmds.c index c5249e44d020..fe48cd2f9cf0 100644 --- a/qom/qom-qmp-cmds.c +++ b/qom/qom-qmp-cmds.c @@ -116,6 +116,7 @@ ObjectTypeInfoList *qmp_qom_list_types(bool has_implements, { ObjectTypeInfoList *ret = NULL; + qdev_module_load_all(); object_class_foreach(qom_list_types_tramp, implements, abstract, &ret); return ret; diff --git a/stubs/hw-module.c b/stubs/hw-module.c new file mode 100644 index 000000000000..1c312d2fc2b3 --- /dev/null +++ b/stubs/hw-module.c @@ -0,0 +1,6 @@ +#include "qemu/osdep.h" +#include "hw/qdev-core.h" + +void qdev_module_load_all(void) +{ +} diff --git a/stubs/Makefile.objs b/stubs/Makefile.objs index 6a9e3135e8f9..a4eb96514ddc 100644 --- a/stubs/Makefile.objs +++ b/stubs/Makefile.objs @@ -44,4 +44,5 @@ stub-obj-y += pci-host-piix.o stub-obj-y += ram-block.o stub-obj-y += ramfb.o stub-obj-y += fw_cfg.o +stub-obj-y += hw-module.o stub-obj-$(CONFIG_SOFTMMU) += semihost.o -- 2.18.4
