xref: /openbmc/linux/include/xen/events.h (revision c21b37f6)
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 
9 enum ipi_vector {
10 	XEN_RESCHEDULE_VECTOR,
11 	XEN_CALL_FUNCTION_VECTOR,
12 
13 	XEN_NR_IPIS,
14 };
15 
16 int bind_evtchn_to_irq(unsigned int evtchn);
17 int bind_evtchn_to_irqhandler(unsigned int evtchn,
18 			      irq_handler_t handler,
19 			      unsigned long irqflags, const char *devname,
20 			      void *dev_id);
21 int bind_virq_to_irqhandler(unsigned int virq, unsigned int cpu,
22 			    irq_handler_t handler,
23 			    unsigned long irqflags, const char *devname,
24 			    void *dev_id);
25 int bind_ipi_to_irqhandler(enum ipi_vector ipi,
26 			   unsigned int cpu,
27 			   irq_handler_t handler,
28 			   unsigned long irqflags,
29 			   const char *devname,
30 			   void *dev_id);
31 
32 /*
33  * Common unbind function for all event sources. Takes IRQ to unbind from.
34  * Automatically closes the underlying event channel (even for bindings
35  * made with bind_evtchn_to_irqhandler()).
36  */
37 void unbind_from_irqhandler(unsigned int irq, void *dev_id);
38 
39 void xen_send_IPI_one(unsigned int cpu, enum ipi_vector vector);
40 
41 static inline void notify_remote_via_evtchn(int port)
42 {
43 	struct evtchn_send send = { .port = port };
44 	(void)HYPERVISOR_event_channel_op(EVTCHNOP_send, &send);
45 }
46 
47 extern void notify_remote_via_irq(int irq);
48 #endif	/* _XEN_EVENTS_H */
49