| 1 |
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| 2 | #ifndef _LINUX_KASAN_ENABLED_H
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| 3 | #define _LINUX_KASAN_ENABLED_H
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| 4 |
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| 5 | #include <linux/static_key.h>
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| 6 |
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| 7 | #if defined(CONFIG_ARCH_DEFER_KASAN) || defined(CONFIG_KASAN_HW_TAGS)
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| 8 | |
| 9 | * Global runtime flag for KASAN modes that need runtime control.
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| 10 | * Used by ARCH_DEFER_KASAN architectures and HW_TAGS mode.
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| 11 |
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| 12 | DECLARE_STATIC_KEY_FALSE(kasan_flag_enabled);
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| 13 |
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| 14 | |
| 15 | * Runtime control for shadow memory initialization or HW_TAGS mode.
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| 16 | * Uses static key for architectures that need deferred KASAN or HW_TAGS.
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| 17 |
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| 18 | static __always_inline bool kasan_enabled(void)
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| 19 | {
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| 20 | return static_branch_likely(&kasan_flag_enabled);
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| 21 | }
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| 22 |
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| 23 | static inline void kasan_enable(void)
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| 24 | {
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| 25 | static_branch_enable(&kasan_flag_enabled);
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| 26 | }
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| 27 | #else
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| 28 |
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| 29 | static __always_inline bool kasan_enabled(void)
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| 30 | {
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| 31 | return IS_ENABLED(CONFIG_KASAN);
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| 32 | }
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| 33 |
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| 34 | static inline void kasan_enable(void) {}
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| 35 | #endif
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| 36 |
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| 37 | #ifdef CONFIG_KASAN_HW_TAGS
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| 38 | static inline bool kasan_hw_tags_enabled(void)
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| 39 | {
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| 40 | return kasan_enabled();
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| 41 | }
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| 42 | #else
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| 43 | static inline bool kasan_hw_tags_enabled(void)
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| 44 | {
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| 45 | return false;
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| 46 | }
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| 47 | #endif
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| 48 |
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| 49 | #endif
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