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target-info: introduce TargetInfo in QOM

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For the single-binary, we want to be able to retrieve at runtime the
current target among the different ones available.
A consequence is that we can't rely on existing target_info() definition
since it will create a conflict once more than one target is available.

To solve this, we add TargetInfo in QOM, with this hierarchy.
We define one class "target-info-X" per target, that inherits from
abstract class "target-info". Using concrete vs abstract class ensure we
can easily filter "target-info-X" from all QOM types.
Associated TargetInfo is directly set through class initialization,
without relying on any instance.

For user mode, we simply define target_info() like it was done
previously. In this patch, we keep the same definition for system-mode
also, and it will be replaced in next commits.

We will introduce detection of target from QOM, so we need to make sure
those types are registered early.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Link: https://lore.kernel.org/qemu-devel/20260514172303.1484273-4-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 10:23:01 -07:00
parent 05ad8be329
commit 0340d819d0
9 changed files with 120 additions and 12 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
configs/targets/aarch64-softmmu.c
View File

@@ -8,6 +8,7 @@
#include "qemu/osdep.h"
#include "qemu/target-info-impl.h"
#include "qemu/target-info-init.h"
#include "hw/arm/machines-qom.h"
#include "target/arm/cpu-qom.h"
#include "target/arm/cpu-param.h"
@@ -23,7 +24,4 @@ static const TargetInfo target_info_aarch64_system = {
.page_bits_init = TARGET_PAGE_BITS_LEGACY,
};
const TargetInfo *target_info(void)
{
return &target_info_aarch64_system;
}
target_info_init(target_info_aarch64_system)

6
configs/targets/arm-softmmu.c
View File

@@ -8,6 +8,7 @@
#include "qemu/osdep.h"
#include "qemu/target-info-impl.h"
#include "qemu/target-info-init.h"
#include "hw/arm/machines-qom.h"
#include "target/arm/cpu-qom.h"
#include "target/arm/cpu-param.h"
@@ -23,7 +24,4 @@ static const TargetInfo target_info_arm_system = {
.page_bits_init = TARGET_PAGE_BITS_LEGACY,
};
const TargetInfo *target_info(void)
{
return &target_info_arm_system;
}
target_info_init(target_info_arm_system)