cregit-Linux how code gets into the kernel

Release 4.7 include/linux/context_tracking.h

Directory: include/linux
#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);

/* Called with interrupts disabled.  */
extern void __context_tracking_enter(enum ctx_state state);
extern void __context_tracking_exit(enum ctx_state state);

extern void context_tracking_enter(enum ctx_state state);
extern void context_tracking_exit(enum ctx_state state);
extern void context_tracking_user_enter(void);
extern void context_tracking_user_exit(void);




static inline void user_enter(void)
{
	if (context_tracking_is_enabled())
		context_tracking_enter(CONTEXT_USER);

}

Contributors
PersonTokensPropCommitsCommitProp
frederic weisbeckerfrederic weisbecker1578.95%266.67%


paolo bonzinipaolo bonzini421.05%133.33%


Total19100.00%3100.00%






static inline void user_exit(void)
{
	if (context_tracking_is_enabled())
		context_tracking_exit(CONTEXT_USER);
}


Contributors
PersonTokensPropCommitsCommitProp
frederic weisbeckerfrederic weisbecker1578.95%266.67%


paolo bonzinipaolo bonzini421.05%133.33%


Total19100.00%3100.00%






static inline enum ctx_state exception_enter(void)
{
	enum ctx_state prev_ctx;

	if (!context_tracking_is_enabled())
		return 0;

	prev_ctx = this_cpu_read(context_tracking.state);
	if (prev_ctx != CONTEXT_KERNEL)
		context_tracking_exit(prev_ctx);

	return prev_ctx;
}


Contributors
PersonTokensPropCommitsCommitProp
frederic weisbeckerfrederic weisbecker3678.26%480.00%


rik van rielrik van riel1021.74%120.00%


Total46100.00%5100.00%






static inline void exception_exit(enum ctx_state prev_ctx)
{
	if (context_tracking_is_enabled()) {
		if (prev_ctx != CONTEXT_KERNEL)
			context_tracking_enter(prev_ctx);
	}
}



Contributors
PersonTokensPropCommitsCommitProp
frederic weisbeckerfrederic weisbecker2379.31%480.00%


rik van rielrik van riel620.69%120.00%


Total29100.00%5100.00%



/**
 * ct_state() - return the current context tracking state if known
 *
 * Returns the current cpu's context tracking state if context tracking
 * is enabled.  If context tracking is disabled, returns
 * CONTEXT_DISABLED.  This should be used primarily for debugging.
 */



static inline enum ctx_state ct_state(void)
{
	return context_tracking_is_enabled() ?
		this_cpu_read(context_tracking.state) : CONTEXT_DISABLED;
}

Contributors
PersonTokensPropCommitsCommitProp
andy lutomirskiandy lutomirski23100.00%1100.00%


Total23100.00%1100.00%



#else



static inline void user_enter(void) { }

Contributors
PersonTokensPropCommitsCommitProp
frederic weisbeckerfrederic weisbecker8100.00%1100.00%


Total8100.00%1100.00%






static inline void user_exit(void) { }

Contributors
PersonTokensPropCommitsCommitProp
frederic weisbeckerfrederic weisbecker8100.00%1100.00%


Total8100.00%1100.00%






static inline enum ctx_state exception_enter(void) { return 0; }

Contributors
PersonTokensPropCommitsCommitProp
frederic weisbeckerfrederic weisbecker13100.00%2100.00%


Total13100.00%2100.00%






static inline void exception_exit(enum ctx_state prev_ctx) { }

Contributors
PersonTokensPropCommitsCommitProp
frederic weisbeckerfrederic weisbecker10100.00%2100.00%


Total10100.00%2100.00%






static inline enum ctx_state ct_state(void) { return CONTEXT_DISABLED; }

Contributors
PersonTokensPropCommitsCommitProp
andy lutomirskiandy lutomirski13100.00%1100.00%


Total13100.00%1100.00%



#endif /* !CONFIG_CONTEXT_TRACKING */


#define CT_WARN_ON(cond) WARN_ON(context_tracking_is_enabled() && (cond))

#ifdef CONFIG_CONTEXT_TRACKING_FORCE
extern void context_tracking_init(void);
#else



static inline void context_tracking_init(void) { }

Contributors
PersonTokensPropCommitsCommitProp
frederic weisbeckerfrederic weisbecker8100.00%1100.00%


Total8100.00%1100.00%



#endif /* CONFIG_CONTEXT_TRACKING_FORCE */


#ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN



static inline void guest_enter(void)
{
	if (vtime_accounting_cpu_enabled())
		vtime_guest_enter(current);
	else
		current->flags |= PF_VCPU;

	if (context_tracking_is_enabled())
		__context_tracking_enter(CONTEXT_GUEST);
}


Contributors
PersonTokensPropCommitsCommitProp
frederic weisbeckerfrederic weisbecker2672.22%360.00%


rik van rielrik van riel925.00%120.00%


paolo bonzinipaolo bonzini12.78%120.00%


Total36100.00%5100.00%






static inline void guest_exit(void)
{
	if (context_tracking_is_enabled())
		__context_tracking_exit(CONTEXT_GUEST);

	if (vtime_accounting_cpu_enabled())
		vtime_guest_exit(current);
	else
		current->flags &= ~PF_VCPU;
}


Contributors
PersonTokensPropCommitsCommitProp
frederic weisbeckerfrederic weisbecker2772.97%360.00%


rik van rielrik van riel924.32%120.00%


paolo bonzinipaolo bonzini12.70%120.00%


Total37100.00%5100.00%



#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;
}


Contributors
PersonTokensPropCommitsCommitProp
frederic weisbeckerfrederic weisbecker21100.00%2100.00%


Total21100.00%2100.00%






static inline void guest_exit(void)
{
	/* Flush the guest cputime we spent on the guest */
	vtime_account_system(current);
	current->flags &= ~PF_VCPU;
}

Contributors
PersonTokensPropCommitsCommitProp
frederic weisbeckerfrederic weisbecker22100.00%2100.00%


Total22100.00%2100.00%



#endif /* CONFIG_VIRT_CPU_ACCOUNTING_GEN */

#endif

Overall Contributors
PersonTokensPropCommitsCommitProp
frederic weisbeckerfrederic weisbecker30570.93%1473.68%


rik van rielrik van riel5212.09%210.53%


andy lutomirskiandy lutomirski4410.23%15.26%


paolo bonzinipaolo bonzini296.74%210.53%


Total430100.00%19100.00%

  
Directory: include/linux



Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
{% endraw %}