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| author | Will Deacon <will@kernel.org> | 2022-12-06 11:01:49 +0000 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2022-12-06 11:01:49 +0000 |
| commit | f6ffa4c8c177c0b52d1c849289b08178f6da0eea (patch) | |
| tree | 299791f71bfb2a9e9312e59ebcc8d4b157f8b5bc /include/linux | |
| parent | 9f930478c648d25e3a4c3db3d69a65cf05ff939a (diff) | |
| parent | 3b619e22c4601b444ed2d6a5458271f72625ac89 (diff) | |
Merge branch 'for-next/dynamic-scs' into for-next/core
* for-next/dynamic-scs:
arm64: implement dynamic shadow call stack for Clang
scs: add support for dynamic shadow call stacks
arm64: unwind: add asynchronous unwind tables to kernel and modules
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/scs.h | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/include/linux/scs.h b/include/linux/scs.h index 18122d9e17ff..4ab5bdc898cf 100644 --- a/include/linux/scs.h +++ b/include/linux/scs.h @@ -53,6 +53,22 @@ static inline bool task_scs_end_corrupted(struct task_struct *tsk) return sz >= SCS_SIZE - 1 || READ_ONCE_NOCHECK(*magic) != SCS_END_MAGIC; } +DECLARE_STATIC_KEY_FALSE(dynamic_scs_enabled); + +static inline bool scs_is_dynamic(void) +{ + if (!IS_ENABLED(CONFIG_DYNAMIC_SCS)) + return false; + return static_branch_likely(&dynamic_scs_enabled); +} + +static inline bool scs_is_enabled(void) +{ + if (!IS_ENABLED(CONFIG_DYNAMIC_SCS)) + return true; + return scs_is_dynamic(); +} + #else /* CONFIG_SHADOW_CALL_STACK */ static inline void *scs_alloc(int node) { return NULL; } @@ -62,6 +78,8 @@ static inline void scs_task_reset(struct task_struct *tsk) {} static inline int scs_prepare(struct task_struct *tsk, int node) { return 0; } static inline void scs_release(struct task_struct *tsk) {} static inline bool task_scs_end_corrupted(struct task_struct *tsk) { return false; } +static inline bool scs_is_enabled(void) { return false; } +static inline bool scs_is_dynamic(void) { return false; } #endif /* CONFIG_SHADOW_CALL_STACK */ |