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#ifndef _LINUX_CONTEXT_TRACKING_H #define _LINUX_CONTEXT_TRACKING_H #include <linux/sched.h> #include <linux/vtime.h> #include <linux/context_tracking_state.h> #include <asm/ptrace.h> #ifdef CONFIG_CONTEXT_TRACKING extern void context_tracking_cpu_set(int cpu); extern void context_tracking_user_enter(void); extern void context_tracking_user_exit(void); extern void __context_tracking_task_switch(struct task_struct *prev, struct task_struct *next); static inline void user_enter(void) { if (static_key_false(&context_tracking_enabled)) context_tracking_user_enter(); } static inline void user_exit(void) { if (static_key_false(&context_tracking_enabled)) context_tracking_user_exit(); } static inline enum ctx_state exception_enter(void) { enum ctx_state prev_ctx; if (!static_key_false(&context_tracking_enabled)) return 0; prev_ctx = this_cpu_read(context_tracking.state); context_tracking_user_exit(); return prev_ctx; } static inline void exception_exit(enum ctx_state prev_ctx) { if (static_key_false(&context_tracking_enabled)) { if (prev_ctx == IN_USER) context_tracking_user_enter(); } } static inline void context_tracking_task_switch(struct task_struct *prev, struct task_struct *next) { if (static_key_false(&context_tracking_enabled)) __context_tracking_task_switch(prev, next); } #else static inline void user_enter(void) { } static inline void user_exit(void) { } static inline enum ctx_state exception_enter(void) { return 0; } static inline void exception_exit(enum ctx_state prev_ctx) { } static inline void context_tracking_task_switch(struct task_struct *prev, struct task_struct *next) { } #endif /* !CONFIG_CONTEXT_TRACKING */ #ifdef CONFIG_CONTEXT_TRACKING_FORCE extern void context_tracking_init(void); #else static inline void context_tracking_init(void) { } #endif /* CONFIG_CONTEXT_TRACKING_FORCE */ #ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN static inline void guest_enter(void) { if (vtime_accounting_enabled()) vtime_guest_enter(current); else current->flags |= PF_VCPU; } static inline void guest_exit(void) { if (vtime_accounting_enabled()) vtime_guest_exit(current); else current->flags &= ~PF_VCPU; } #else static inline void guest_enter(void) { /* * This is running in ioctl context so its safe * to assume that it's the stime pending cputime * to flush. */ vtime_account_system(current); current->flags |= PF_VCPU; } static inline void guest_exit(void) { /* Flush the guest cputime we spent on the guest */ vtime_account_system(current); current->flags &= ~PF_VCPU; } #endif /* CONFIG_VIRT_CPU_ACCOUNTING_GEN */ #endif