1b2441318SGreg Kroah-Hartman /* SPDX-License-Identifier: GPL-2.0 */ 25c9a8750SDmitry Vyukov #ifndef _LINUX_KCOV_H 35c9a8750SDmitry Vyukov #define _LINUX_KCOV_H 45c9a8750SDmitry Vyukov 55c9a8750SDmitry Vyukov #include <uapi/linux/kcov.h> 65c9a8750SDmitry Vyukov 75c9a8750SDmitry Vyukov struct task_struct; 85c9a8750SDmitry Vyukov 95c9a8750SDmitry Vyukov #ifdef CONFIG_KCOV 105c9a8750SDmitry Vyukov 115c9a8750SDmitry Vyukov enum kcov_mode { 125c9a8750SDmitry Vyukov /* Coverage collection is not enabled yet. */ 135c9a8750SDmitry Vyukov KCOV_MODE_DISABLED = 0, 14ded97d2cSVictor Chibotaru /* KCOV was initialized, but tracing mode hasn't been chosen yet. */ 15ded97d2cSVictor Chibotaru KCOV_MODE_INIT = 1, 165c9a8750SDmitry Vyukov /* 175c9a8750SDmitry Vyukov * Tracing coverage collection mode. 185c9a8750SDmitry Vyukov * Covered PCs are collected in a per-task buffer. 195c9a8750SDmitry Vyukov */ 20ded97d2cSVictor Chibotaru KCOV_MODE_TRACE_PC = 2, 21ded97d2cSVictor Chibotaru /* Collecting comparison operands mode. */ 22ded97d2cSVictor Chibotaru KCOV_MODE_TRACE_CMP = 3, 235c9a8750SDmitry Vyukov }; 245c9a8750SDmitry Vyukov 25*0ed557aaSMark Rutland #define KCOV_IN_CTXSW (1 << 30) 26*0ed557aaSMark Rutland 27ded97d2cSVictor Chibotaru void kcov_task_init(struct task_struct *t); 28ded97d2cSVictor Chibotaru void kcov_task_exit(struct task_struct *t); 29ded97d2cSVictor Chibotaru 30*0ed557aaSMark Rutland #define kcov_prepare_switch(t) \ 31*0ed557aaSMark Rutland do { \ 32*0ed557aaSMark Rutland (t)->kcov_mode |= KCOV_IN_CTXSW; \ 33*0ed557aaSMark Rutland } while (0) 34*0ed557aaSMark Rutland 35*0ed557aaSMark Rutland #define kcov_finish_switch(t) \ 36*0ed557aaSMark Rutland do { \ 37*0ed557aaSMark Rutland (t)->kcov_mode &= ~KCOV_IN_CTXSW; \ 38*0ed557aaSMark Rutland } while (0) 39*0ed557aaSMark Rutland 405c9a8750SDmitry Vyukov #else 415c9a8750SDmitry Vyukov 425c9a8750SDmitry Vyukov static inline void kcov_task_init(struct task_struct *t) {} 435c9a8750SDmitry Vyukov static inline void kcov_task_exit(struct task_struct *t) {} 44*0ed557aaSMark Rutland static inline void kcov_prepare_switch(struct task_struct *t) {} 45*0ed557aaSMark Rutland static inline void kcov_finish_switch(struct task_struct *t) {} 465c9a8750SDmitry Vyukov 475c9a8750SDmitry Vyukov #endif /* CONFIG_KCOV */ 485c9a8750SDmitry Vyukov #endif /* _LINUX_KCOV_H */ 49