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