tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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_irq(unsigned int virq, unsigned int cpu);
16int bind_virq_to_irqhandler(unsigned int virq, unsigned int cpu,
17 irq_handler_t handler,
18 unsigned long irqflags, const char *devname,
19 void *dev_id);
20int bind_ipi_to_irqhandler(enum ipi_vector ipi,
21 unsigned int cpu,
22 irq_handler_t handler,
23 unsigned long irqflags,
24 const char *devname,
25 void *dev_id);
26int bind_interdomain_evtchn_to_irqhandler(unsigned int remote_domain,
27 unsigned int remote_port,
28 irq_handler_t handler,
29 unsigned long irqflags,
30 const char *devname,
31 void *dev_id);
32
33/*
34 * Common unbind function for all event sources. Takes IRQ to unbind from.
35 * Automatically closes the underlying event channel (even for bindings
36 * made with bind_evtchn_to_irqhandler()).
37 */
38void unbind_from_irqhandler(unsigned int irq, void *dev_id);
39
40/*
41 * Allow extra references to event channels exposed to userspace by evtchn
42 */
43int evtchn_make_refcounted(unsigned int evtchn);
44int evtchn_get(unsigned int evtchn);
45void evtchn_put(unsigned int evtchn);
46
47void xen_send_IPI_one(unsigned int cpu, enum ipi_vector vector);
48int resend_irq_on_evtchn(unsigned int irq);
49void rebind_evtchn_irq(int evtchn, int irq);
50
51static inline void notify_remote_via_evtchn(int port)
52{
53 struct evtchn_send send = { .port = port };
54 (void)HYPERVISOR_event_channel_op(EVTCHNOP_send, &send);
55}
56
57void notify_remote_via_irq(int irq);
58
59void xen_irq_resume(void);
60
61/* Clear an irq's pending state, in preparation for polling on it */
62void xen_clear_irq_pending(int irq);
63void xen_set_irq_pending(int irq);
64bool xen_test_irq_pending(int irq);
65
66/* Poll waiting for an irq to become pending. In the usual case, the
67 irq will be disabled so it won't deliver an interrupt. */
68void xen_poll_irq(int irq);
69
70/* Poll waiting for an irq to become pending with a timeout. In the usual case,
71 * the irq will be disabled so it won't deliver an interrupt. */
72void xen_poll_irq_timeout(int irq, u64 timeout);
73
74/* Determine the IRQ which is bound to an event channel */
75unsigned irq_from_evtchn(unsigned int evtchn);
76
77/* Xen HVM evtchn vector callback */
78void xen_hvm_callback_vector(void);
79#ifdef CONFIG_TRACING
80#define trace_xen_hvm_callback_vector xen_hvm_callback_vector
81#endif
82extern int xen_have_vector_callback;
83int xen_set_callback_via(uint64_t via);
84void xen_evtchn_do_upcall(struct pt_regs *regs);
85void xen_hvm_evtchn_do_upcall(void);
86
87/* Bind a pirq for a physical interrupt to an irq. */
88int xen_bind_pirq_gsi_to_irq(unsigned gsi,
89 unsigned pirq, int shareable, char *name);
90
91#ifdef CONFIG_PCI_MSI
92/* Allocate a pirq for a MSI style physical interrupt. */
93int xen_allocate_pirq_msi(struct pci_dev *dev, struct msi_desc *msidesc);
94/* Bind an PSI pirq to an irq. */
95int xen_bind_pirq_msi_to_irq(struct pci_dev *dev, struct msi_desc *msidesc,
96 int pirq, const char *name, domid_t domid);
97#endif
98
99/* De-allocates the above mentioned physical interrupt. */
100int xen_destroy_irq(int irq);
101
102/* Return irq from pirq */
103int xen_irq_from_pirq(unsigned pirq);
104
105/* Return the pirq allocated to the irq. */
106int xen_pirq_from_irq(unsigned irq);
107
108/* Return the irq allocated to the gsi */
109int xen_irq_from_gsi(unsigned gsi);
110
111/* Determine whether to ignore this IRQ if it is passed to a guest. */
112int xen_test_irq_shared(int irq);
113
114/* initialize Xen IRQ subsystem */
115void xen_init_IRQ(void);
116#endif /* _XEN_EVENTS_H */