On 4/28/2026 4:45 PM, Pierrick Bouvier wrote: > We are getting close to be able to link several targets in a single QEMU > system > binary, and the last obstacle on the road is to embed several TargetInfo in > the > same binary. The end result of this series is to have a single definition for > target_info symbol. > > This series adds TargetInfo types in QOM, and retrieve them dynamically(). At > the moment, we don't deal yet with multiple TargetInfo selection, but install > all that is needed to be able to do it easily. > > Because TargetInfo data is set through class_init, it creates an issue at > startup, where we may try to instantiate additional (unrelated) types just to > retrieve the list of "target-info-X" types. Those other types class_init may > be > using target information, to add target specific properties for instance. > This issue has been fixed by adding a new object_class_get_list_by_name_prefix > that does not force instantiation of all QOM types, but only those matching a > specific pattern. This way, we first initialize and retrieve target-info types > before others. > > An alternative would be to leave all this out of QOM, and use startup > initializer to add them in a single list. However, because all the > single-binary > work has been using QOM where possible, it would be really sad to not use it > for > this final step. Comments are welcome! > > Finally, sticking to our promise not create a special "single-binary > configuration", the goal is to use the *exact* same codepath for normal > binaries > also. It means that even for existing system binaries, the goal will be to use > QOM to retrieve current target, even if there is only one. > > Pierrick Bouvier (6): > target-info: extract target_info() definition in target-info-init.h > target-info: introduce TargetInfo in QOM > system/vl: initialize QOM first > qom/object: add object_class_get_list_by_name_prefix > target-info-qom: detect target from QOM > target-info: replace target_info() in system-mode > > configs/targets/aarch64-softmmu.c | 6 +-- > configs/targets/arm-softmmu.c | 6 +-- > include/qemu/target-info-init.h | 63 +++++++++++++++++++++++++++++++ > include/qemu/target-info-qom.h | 25 ++++++++++++ > include/qom/object.h | 13 +++++++ > qom/object.c | 40 ++++++++++++++++++++ > system/runstate.c | 1 - > system/vl.c | 5 +++ > target-info-qom.c | 32 ++++++++++++++++ > target-info-stub.c | 6 +-- > 10 files changed, 184 insertions(+), 13 deletions(-) > create mode 100644 include/qemu/target-info-init.h > create mode 100644 include/qemu/target-info-qom.h >
Sent v2: [email protected] Regards, Pierrick
