50 lines
1.2 KiB
C
50 lines
1.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _LINUX_KASAN_ENABLED_H
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#define _LINUX_KASAN_ENABLED_H
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#include <linux/static_key.h>
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#if defined(CONFIG_ARCH_DEFER_KASAN) || defined(CONFIG_KASAN_HW_TAGS)
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/*
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* Global runtime flag for KASAN modes that need runtime control.
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* Used by ARCH_DEFER_KASAN architectures and HW_TAGS mode.
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*/
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DECLARE_STATIC_KEY_FALSE(kasan_flag_enabled);
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/*
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* Runtime control for shadow memory initialization or HW_TAGS mode.
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* Uses static key for architectures that need deferred KASAN or HW_TAGS.
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*/
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static __always_inline bool kasan_enabled(void)
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{
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return static_branch_likely(&kasan_flag_enabled);
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}
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static inline void kasan_enable(void)
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{
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static_branch_enable(&kasan_flag_enabled);
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}
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#else
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/* For architectures that can enable KASAN early, use compile-time check. */
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static __always_inline bool kasan_enabled(void)
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{
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return IS_ENABLED(CONFIG_KASAN);
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}
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static inline void kasan_enable(void) {}
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#endif /* CONFIG_ARCH_DEFER_KASAN || CONFIG_KASAN_HW_TAGS */
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#ifdef CONFIG_KASAN_HW_TAGS
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static inline bool kasan_hw_tags_enabled(void)
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{
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return kasan_enabled();
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}
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#else
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static inline bool kasan_hw_tags_enabled(void)
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{
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return false;
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}
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#endif /* CONFIG_KASAN_HW_TAGS */
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#endif /* LINUX_KASAN_ENABLED_H */
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