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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>
59 lines
2.3 KiB
C
59 lines
2.3 KiB
C
/*
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* QEMU target info initialization
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*
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* Copyright (c) Qualcomm
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*
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* This file is included by each file defining a TargetInfo structure and is
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* responsible for registering it.
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*/
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#ifndef QEMU_TARGET_INFO_INIT_H
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#define QEMU_TARGET_INFO_INIT_H
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#define DEFINE_TARGET_INFO_TYPE(info) \
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static void do_qemu_init_target_info(void) \
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{ \
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type_register_static(&info); \
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} \
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module_init(do_qemu_init_target_info, MODULE_INIT_TARGET_INFO)
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#ifdef COMPILING_PER_TARGET
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#ifdef CONFIG_USER_ONLY
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/*
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* User mode does not support multiple targets in the same binary, so just
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* define target_info().
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*/
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#define target_info_init(ti_var) \
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const TargetInfo *target_info(void) \
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{ \
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return &ti_var; \
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}
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#else /* CONFIG_USER_ONLY */
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#include "qemu/target-info-qom.h"
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#include "qom/object.h"
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#define target_info_init(ti_var) \
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const TargetInfo *target_info(void) \
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{ \
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return &ti_var; \
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} \
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\
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static const TypeInfo target_info_qom_target_type_info = { \
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.name = TYPE_TARGET_INFO"-"TARGET_NAME, \
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.parent = TYPE_TARGET_INFO, \
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.instance_size = sizeof(TargetInfoQom), \
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.class_size = sizeof(TargetInfoQomClass), \
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.class_data = &ti_var, \
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}; \
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DEFINE_TARGET_INFO_TYPE(target_info_qom_target_type_info)
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#endif /* CONFIG_USER_ONLY */
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#endif /* COMPILING_PER_TARGET */
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#endif /* QEMU_TARGET_INFO_INIT_H */
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