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target-info-qom: detect target from QOM

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For now, we expect only one target to be available at runtime. This will
change with the single-binary and we'll detect which one to use
dynamically.

Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Link: https://lore.kernel.org/qemu-devel/20260514172303.1484273-5-pierrick.bouvier@oss.qualcomm.com
Signed-off-by: Pierrick Bouvier <pierrick.bouvier@oss.qualcomm.com>
This commit is contained in:
Pierrick Bouvier
2026-05-14 10:23:02 -07:00
parent 0340d819d0
commit 20a1a1579a
4 changed files with 22 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
include/qemu/target-info-qom.h
View File

@@ -25,4 +25,6 @@ typedef struct TargetInfoQomClass {
OBJECT_DECLARE_TYPE(TargetInfoQom, TargetInfoQomClass, TARGET_INFO)
void target_info_qom_set_target(void);
#endif /* QEMU_TARGET_INFO_QOM_H */

2
system/vl.c
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@@ -28,6 +28,7 @@
#include "qemu/units.h"
#include "qemu/module.h"
#include "qemu/target-info.h"
#include "qemu/target-info-qom.h"
#include "exec/cpu-common.h"
#include "exec/page-vary.h"
#include "hw/core/qdev-properties.h"
@@ -2890,6 +2891,7 @@ void qemu_init(int argc, char **argv)
os_setup_limits();
module_call_init(MODULE_INIT_TARGET_INFO);
target_info_qom_set_target();
module_init_info(qemu_modinfo);
module_allow_arch(target_name());

16
target-info-qom.c
View File

@@ -46,3 +46,19 @@ static const TypeInfo target_info_parent_type = {
};
DEFINE_TARGET_INFO_TYPE(target_info_parent_type)
static const TargetInfo *target_info_ptr;
void target_info_qom_set_target(void)
{
g_autoptr(GSList) targets = object_class_get_list(TYPE_TARGET_INFO, false);
size_t num_found = g_slist_length(targets);
if (num_found != 1) {
error_setg(&error_fatal, num_found == 0 ?
"no target-info is available" :
"more than one target-info is available");
}
target_info_ptr = TARGET_INFO_CLASS(targets->data)->target_info;
}

2
tests/qtest/fuzz/fuzz.c
View File

@@ -22,6 +22,7 @@
#include "system/runstate.h"
#include "qemu/main-loop.h"
#include "qemu/rcu.h"
#include "qemu/target-info-qom.h"
#include "tests/qtest/libqtest.h"
#include "tests/qtest/libqos/qgraph.h"
#include "fuzz.h"
@@ -173,6 +174,7 @@ int LLVMFuzzerInitialize(int *argc, char ***argv, char ***envp)
/* Initialize qgraph and modules */
qos_graph_init();
module_call_init(MODULE_INIT_TARGET_INFO);
target_info_qom_set_target();
module_call_init(MODULE_INIT_FUZZ_TARGET);
module_call_init(MODULE_INIT_QOM);
module_call_init(MODULE_INIT_LIBQOS);