root/include/xen/events.h

INCLUDED FROM

DEFINITIONS

1. notify_remote_via_evtchn

#ifndef _XEN_EVENTS_H
#define _XEN_EVENTS_H

#include <linux/interrupt.h>

#include <xen/interface/event_channel.h>
#include <asm/xen/hypercall.h>
#include <asm/xen/events.h>

int bind_evtchn_to_irq(unsigned int evtchn);
int bind_evtchn_to_irqhandler(unsigned int evtchn,
                              irq_handler_t handler,
                              unsigned long irqflags, const char *devname,
                              void *dev_id);
int bind_virq_to_irqhandler(unsigned int virq, unsigned int cpu,
                            irq_handler_t handler,
                            unsigned long irqflags, const char *devname,
                            void *dev_id);
int bind_ipi_to_irqhandler(enum ipi_vector ipi,
                           unsigned int cpu,
                           irq_handler_t handler,
                           unsigned long irqflags,
                           const char *devname,
                           void *dev_id);

/*
 * Common unbind function for all event sources. Takes IRQ to unbind from.
 * Automatically closes the underlying event channel (even for bindings
 * made with bind_evtchn_to_irqhandler()).
 */
void unbind_from_irqhandler(unsigned int irq, void *dev_id);

void xen_send_IPI_one(unsigned int cpu, enum ipi_vector vector);
int resend_irq_on_evtchn(unsigned int irq);
void rebind_evtchn_irq(int evtchn, int irq);

static inline void notify_remote_via_evtchn(int port)
{
        struct evtchn_send send = { .port = port };
        (void)HYPERVISOR_event_channel_op(EVTCHNOP_send, &send);
}

extern void notify_remote_via_irq(int irq);

extern void xen_irq_resume(void);

/* Clear an irq's pending state, in preparation for polling on it */
void xen_clear_irq_pending(int irq);
void xen_set_irq_pending(int irq);
bool xen_test_irq_pending(int irq);

/* Poll waiting for an irq to become pending.  In the usual case, the
   irq will be disabled so it won't deliver an interrupt. */
void xen_poll_irq(int irq);

#endif  /* _XEN_EVENTS_H */