1#ifndef _XEN_EVENTS_H 2#define _XEN_EVENTS_H 3 4#include <linux/interrupt.h> 5 6#include <xen/interface/event_channel.h> 7#include <asm/xen/hypercall.h> 8#include <asm/xen/events.h> 9 10int bind_evtchn_to_irq(unsigned int evtchn); 11int bind_evtchn_to_irqhandler(unsigned int evtchn, 12 irq_handler_t handler, 13 unsigned long irqflags, const char *devname, 14 void *dev_id); 15int bind_virq_to_irqhandler(unsigned int virq, unsigned int cpu, 16 irq_handler_t handler, 17 unsigned long irqflags, const char *devname, 18 void *dev_id); 19int bind_ipi_to_irqhandler(enum ipi_vector ipi, 20 unsigned int cpu, 21 irq_handler_t handler, 22 unsigned long irqflags, 23 const char *devname, 24 void *dev_id); 25 26/* 27 * Common unbind function for all event sources. Takes IRQ to unbind from. 28 * Automatically closes the underlying event channel (even for bindings 29 * made with bind_evtchn_to_irqhandler()). 30 */ 31void unbind_from_irqhandler(unsigned int irq, void *dev_id); 32 33void xen_send_IPI_one(unsigned int cpu, enum ipi_vector vector); 34int resend_irq_on_evtchn(unsigned int irq); 35void rebind_evtchn_irq(int evtchn, int irq); 36 37static inline void notify_remote_via_evtchn(int port) 38{ 39 struct evtchn_send send = { .port = port }; 40 (void)HYPERVISOR_event_channel_op(EVTCHNOP_send, &send); 41} 42 43extern void notify_remote_via_irq(int irq); 44 45extern void xen_irq_resume(void); 46 47/* Clear an irq's pending state, in preparation for polling on it */ 48void xen_clear_irq_pending(int irq); 49void xen_set_irq_pending(int irq); 50bool xen_test_irq_pending(int irq); 51 52/* Poll waiting for an irq to become pending. In the usual case, the 53 irq will be disabled so it won't deliver an interrupt. */ 54void xen_poll_irq(int irq); 55 56/* Determine the IRQ which is bound to an event channel */ 57unsigned irq_from_evtchn(unsigned int evtchn); 58 59/* Xen HVM evtchn vector callback */ 60extern void xen_hvm_callback_vector(void); 61extern int xen_have_vector_callback; 62int xen_set_callback_via(uint64_t via); 63void xen_evtchn_do_upcall(struct pt_regs *regs); 64void xen_hvm_evtchn_do_upcall(void); 65 66#endif /* _XEN_EVENTS_H */ 67