1 /* SPDX-License-Identifier: GPL-2.0 */
5 #include <linux/interrupt.h>
11 #include <xen/interface/event_channel.h>
12 #include <asm/xen/hypercall.h>
13 #include <asm/xen/events.h>
17 unsigned xen_evtchn_nr_channels(void);
19 int bind_evtchn_to_irq(evtchn_port_t evtchn);
20 int bind_evtchn_to_irq_lateeoi(evtchn_port_t evtchn);
21 int bind_evtchn_to_irqhandler(evtchn_port_t evtchn,
22 irq_handler_t handler,
23 unsigned long irqflags, const char *devname,
25 int bind_evtchn_to_irqhandler_lateeoi(evtchn_port_t evtchn,
26 irq_handler_t handler,
27 unsigned long irqflags, const char *devname,
29 int bind_virq_to_irq(unsigned int virq, unsigned int cpu, bool percpu);
30 int bind_virq_to_irqhandler(unsigned int virq, unsigned int cpu,
31 irq_handler_t handler,
32 unsigned long irqflags, const char *devname,
34 int bind_ipi_to_irqhandler(enum ipi_vector ipi,
36 irq_handler_t handler,
37 unsigned long irqflags,
40 int bind_interdomain_evtchn_to_irq_lateeoi(struct xenbus_device *dev,
41 evtchn_port_t remote_port);
42 int bind_interdomain_evtchn_to_irqhandler_lateeoi(struct xenbus_device *dev,
43 evtchn_port_t remote_port,
44 irq_handler_t handler,
45 unsigned long irqflags,
50 * Common unbind function for all event sources. Takes IRQ to unbind from.
51 * Automatically closes the underlying event channel (even for bindings
52 * made with bind_evtchn_to_irqhandler()).
54 void unbind_from_irqhandler(unsigned int irq, void *dev_id);
57 * Send late EOI for an IRQ bound to an event channel via one of the *_lateeoi
60 void xen_irq_lateeoi(unsigned int irq, unsigned int eoi_flags);
61 /* Signal an event was spurious, i.e. there was no action resulting from it. */
62 #define XEN_EOI_FLAG_SPURIOUS 0x00000001
64 #define XEN_IRQ_PRIORITY_MAX EVTCHN_FIFO_PRIORITY_MAX
65 #define XEN_IRQ_PRIORITY_DEFAULT EVTCHN_FIFO_PRIORITY_DEFAULT
66 #define XEN_IRQ_PRIORITY_MIN EVTCHN_FIFO_PRIORITY_MIN
67 int xen_set_irq_priority(unsigned irq, unsigned priority);
70 * Allow extra references to event channels exposed to userspace by evtchn
72 int evtchn_make_refcounted(evtchn_port_t evtchn, bool is_static);
73 int evtchn_get(evtchn_port_t evtchn);
74 void evtchn_put(evtchn_port_t evtchn);
76 void xen_send_IPI_one(unsigned int cpu, enum ipi_vector vector);
77 void rebind_evtchn_irq(evtchn_port_t evtchn, int irq);
79 static inline void notify_remote_via_evtchn(evtchn_port_t port)
81 struct evtchn_send send = { .port = port };
82 (void)HYPERVISOR_event_channel_op(EVTCHNOP_send, &send);
85 void notify_remote_via_irq(int irq);
87 void xen_irq_resume(void);
89 /* Clear an irq's pending state, in preparation for polling on it */
90 void xen_clear_irq_pending(int irq);
91 void xen_set_irq_pending(int irq);
92 bool xen_test_irq_pending(int irq);
94 /* Poll waiting for an irq to become pending. In the usual case, the
95 irq will be disabled so it won't deliver an interrupt. */
96 void xen_poll_irq(int irq);
98 /* Poll waiting for an irq to become pending with a timeout. In the usual case,
99 * the irq will be disabled so it won't deliver an interrupt. */
100 void xen_poll_irq_timeout(int irq, u64 timeout);
102 /* Determine the IRQ which is bound to an event channel */
103 unsigned int irq_from_evtchn(evtchn_port_t evtchn);
104 int irq_from_virq(unsigned int cpu, unsigned int virq);
105 evtchn_port_t evtchn_from_irq(unsigned irq);
107 int xen_set_callback_via(uint64_t via);
108 void xen_evtchn_do_upcall(struct pt_regs *regs);
109 int xen_hvm_evtchn_do_upcall(void);
111 /* Bind a pirq for a physical interrupt to an irq. */
112 int xen_bind_pirq_gsi_to_irq(unsigned gsi,
113 unsigned pirq, int shareable, char *name);
115 #ifdef CONFIG_PCI_MSI
116 /* Allocate a pirq for a MSI style physical interrupt. */
117 int xen_allocate_pirq_msi(struct pci_dev *dev, struct msi_desc *msidesc);
118 /* Bind an PSI pirq to an irq. */
119 int xen_bind_pirq_msi_to_irq(struct pci_dev *dev, struct msi_desc *msidesc,
120 int pirq, int nvec, const char *name, domid_t domid);
123 /* De-allocates the above mentioned physical interrupt. */
124 int xen_destroy_irq(int irq);
126 /* Return irq from pirq */
127 int xen_irq_from_pirq(unsigned pirq);
129 /* Return the pirq allocated to the irq. */
130 int xen_pirq_from_irq(unsigned irq);
132 /* Return the irq allocated to the gsi */
133 int xen_irq_from_gsi(unsigned gsi);
135 /* Determine whether to ignore this IRQ if it is passed to a guest. */
136 int xen_test_irq_shared(int irq);
138 /* initialize Xen IRQ subsystem */
139 void xen_init_IRQ(void);
141 irqreturn_t xen_debug_interrupt(int irq, void *dev_id);
143 static inline void xen_evtchn_close(evtchn_port_t port)
145 struct evtchn_close close;
148 if (HYPERVISOR_event_channel_op(EVTCHNOP_close, &close) != 0)
152 #endif /* _XEN_EVENTS_H */