1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */ 2*4882a593Smuzhiyun #ifndef _LINUX_KCOV_H 3*4882a593Smuzhiyun #define _LINUX_KCOV_H 4*4882a593Smuzhiyun 5*4882a593Smuzhiyun #include <uapi/linux/kcov.h> 6*4882a593Smuzhiyun 7*4882a593Smuzhiyun struct task_struct; 8*4882a593Smuzhiyun 9*4882a593Smuzhiyun #ifdef CONFIG_KCOV 10*4882a593Smuzhiyun 11*4882a593Smuzhiyun enum kcov_mode { 12*4882a593Smuzhiyun /* Coverage collection is not enabled yet. */ 13*4882a593Smuzhiyun KCOV_MODE_DISABLED = 0, 14*4882a593Smuzhiyun /* KCOV was initialized, but tracing mode hasn't been chosen yet. */ 15*4882a593Smuzhiyun KCOV_MODE_INIT = 1, 16*4882a593Smuzhiyun /* 17*4882a593Smuzhiyun * Tracing coverage collection mode. 18*4882a593Smuzhiyun * Covered PCs are collected in a per-task buffer. 19*4882a593Smuzhiyun */ 20*4882a593Smuzhiyun KCOV_MODE_TRACE_PC = 2, 21*4882a593Smuzhiyun /* Collecting comparison operands mode. */ 22*4882a593Smuzhiyun KCOV_MODE_TRACE_CMP = 3, 23*4882a593Smuzhiyun }; 24*4882a593Smuzhiyun 25*4882a593Smuzhiyun #define KCOV_IN_CTXSW (1 << 30) 26*4882a593Smuzhiyun 27*4882a593Smuzhiyun void kcov_task_init(struct task_struct *t); 28*4882a593Smuzhiyun void kcov_task_exit(struct task_struct *t); 29*4882a593Smuzhiyun 30*4882a593Smuzhiyun #define kcov_prepare_switch(t) \ 31*4882a593Smuzhiyun do { \ 32*4882a593Smuzhiyun (t)->kcov_mode |= KCOV_IN_CTXSW; \ 33*4882a593Smuzhiyun } while (0) 34*4882a593Smuzhiyun 35*4882a593Smuzhiyun #define kcov_finish_switch(t) \ 36*4882a593Smuzhiyun do { \ 37*4882a593Smuzhiyun (t)->kcov_mode &= ~KCOV_IN_CTXSW; \ 38*4882a593Smuzhiyun } while (0) 39*4882a593Smuzhiyun 40*4882a593Smuzhiyun /* See Documentation/dev-tools/kcov.rst for usage details. */ 41*4882a593Smuzhiyun void kcov_remote_start(u64 handle); 42*4882a593Smuzhiyun void kcov_remote_stop(void); 43*4882a593Smuzhiyun u64 kcov_common_handle(void); 44*4882a593Smuzhiyun kcov_remote_start_common(u64 id)45*4882a593Smuzhiyunstatic inline void kcov_remote_start_common(u64 id) 46*4882a593Smuzhiyun { 47*4882a593Smuzhiyun kcov_remote_start(kcov_remote_handle(KCOV_SUBSYSTEM_COMMON, id)); 48*4882a593Smuzhiyun } 49*4882a593Smuzhiyun kcov_remote_start_usb(u64 id)50*4882a593Smuzhiyunstatic inline void kcov_remote_start_usb(u64 id) 51*4882a593Smuzhiyun { 52*4882a593Smuzhiyun kcov_remote_start(kcov_remote_handle(KCOV_SUBSYSTEM_USB, id)); 53*4882a593Smuzhiyun } 54*4882a593Smuzhiyun 55*4882a593Smuzhiyun #else 56*4882a593Smuzhiyun kcov_task_init(struct task_struct * t)57*4882a593Smuzhiyunstatic inline void kcov_task_init(struct task_struct *t) {} kcov_task_exit(struct task_struct * t)58*4882a593Smuzhiyunstatic inline void kcov_task_exit(struct task_struct *t) {} kcov_prepare_switch(struct task_struct * t)59*4882a593Smuzhiyunstatic inline void kcov_prepare_switch(struct task_struct *t) {} kcov_finish_switch(struct task_struct * t)60*4882a593Smuzhiyunstatic inline void kcov_finish_switch(struct task_struct *t) {} kcov_remote_start(u64 handle)61*4882a593Smuzhiyunstatic inline void kcov_remote_start(u64 handle) {} kcov_remote_stop(void)62*4882a593Smuzhiyunstatic inline void kcov_remote_stop(void) {} kcov_common_handle(void)63*4882a593Smuzhiyunstatic inline u64 kcov_common_handle(void) 64*4882a593Smuzhiyun { 65*4882a593Smuzhiyun return 0; 66*4882a593Smuzhiyun } kcov_remote_start_common(u64 id)67*4882a593Smuzhiyunstatic inline void kcov_remote_start_common(u64 id) {} kcov_remote_start_usb(u64 id)68*4882a593Smuzhiyunstatic inline void kcov_remote_start_usb(u64 id) {} 69*4882a593Smuzhiyun 70*4882a593Smuzhiyun #endif /* CONFIG_KCOV */ 71*4882a593Smuzhiyun #endif /* _LINUX_KCOV_H */ 72