6ccecb0fbc
Add xen_irq_set_priority() to set an event channels priority. This function will only work with event channel ABIs that support priority (i.e., the FIFO-based ABI). Signed-off-by: David Vrabel <david.vrabel@citrix.com> Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
125 lines
4.1 KiB
C
125 lines
4.1 KiB
C
#ifndef _XEN_EVENTS_H
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#define _XEN_EVENTS_H
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#include <linux/interrupt.h>
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#include <xen/interface/event_channel.h>
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#include <asm/xen/hypercall.h>
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#include <asm/xen/events.h>
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unsigned xen_evtchn_nr_channels(void);
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int bind_evtchn_to_irq(unsigned int evtchn);
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int bind_evtchn_to_irqhandler(unsigned int evtchn,
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irq_handler_t handler,
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unsigned long irqflags, const char *devname,
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void *dev_id);
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int bind_virq_to_irq(unsigned int virq, unsigned int cpu);
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int bind_virq_to_irqhandler(unsigned int virq, unsigned int cpu,
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irq_handler_t handler,
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unsigned long irqflags, const char *devname,
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void *dev_id);
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int bind_ipi_to_irqhandler(enum ipi_vector ipi,
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unsigned int cpu,
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irq_handler_t handler,
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unsigned long irqflags,
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const char *devname,
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void *dev_id);
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int bind_interdomain_evtchn_to_irqhandler(unsigned int remote_domain,
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unsigned int remote_port,
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irq_handler_t handler,
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unsigned long irqflags,
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const char *devname,
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void *dev_id);
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/*
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* Common unbind function for all event sources. Takes IRQ to unbind from.
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* Automatically closes the underlying event channel (even for bindings
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* made with bind_evtchn_to_irqhandler()).
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*/
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void unbind_from_irqhandler(unsigned int irq, void *dev_id);
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#define XEN_IRQ_PRIORITY_MAX EVTCHN_FIFO_PRIORITY_MAX
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#define XEN_IRQ_PRIORITY_DEFAULT EVTCHN_FIFO_PRIORITY_DEFAULT
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#define XEN_IRQ_PRIORITY_MIN EVTCHN_FIFO_PRIORITY_MIN
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int xen_set_irq_priority(unsigned irq, unsigned priority);
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/*
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* Allow extra references to event channels exposed to userspace by evtchn
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*/
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int evtchn_make_refcounted(unsigned int evtchn);
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int evtchn_get(unsigned int evtchn);
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void evtchn_put(unsigned int evtchn);
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void xen_send_IPI_one(unsigned int cpu, enum ipi_vector vector);
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int resend_irq_on_evtchn(unsigned int irq);
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void rebind_evtchn_irq(int evtchn, int irq);
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static inline void notify_remote_via_evtchn(int port)
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{
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struct evtchn_send send = { .port = port };
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(void)HYPERVISOR_event_channel_op(EVTCHNOP_send, &send);
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}
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void notify_remote_via_irq(int irq);
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void xen_irq_resume(void);
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/* Clear an irq's pending state, in preparation for polling on it */
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void xen_clear_irq_pending(int irq);
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void xen_set_irq_pending(int irq);
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bool xen_test_irq_pending(int irq);
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/* Poll waiting for an irq to become pending. In the usual case, the
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irq will be disabled so it won't deliver an interrupt. */
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void xen_poll_irq(int irq);
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/* Poll waiting for an irq to become pending with a timeout. In the usual case,
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* the irq will be disabled so it won't deliver an interrupt. */
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void xen_poll_irq_timeout(int irq, u64 timeout);
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/* Determine the IRQ which is bound to an event channel */
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unsigned irq_from_evtchn(unsigned int evtchn);
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int irq_from_virq(unsigned int cpu, unsigned int virq);
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unsigned int evtchn_from_irq(unsigned irq);
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/* Xen HVM evtchn vector callback */
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void xen_hvm_callback_vector(void);
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#ifdef CONFIG_TRACING
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#define trace_xen_hvm_callback_vector xen_hvm_callback_vector
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#endif
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extern int xen_have_vector_callback;
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int xen_set_callback_via(uint64_t via);
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void xen_evtchn_do_upcall(struct pt_regs *regs);
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void xen_hvm_evtchn_do_upcall(void);
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/* Bind a pirq for a physical interrupt to an irq. */
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int xen_bind_pirq_gsi_to_irq(unsigned gsi,
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unsigned pirq, int shareable, char *name);
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#ifdef CONFIG_PCI_MSI
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/* Allocate a pirq for a MSI style physical interrupt. */
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int xen_allocate_pirq_msi(struct pci_dev *dev, struct msi_desc *msidesc);
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/* Bind an PSI pirq to an irq. */
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int xen_bind_pirq_msi_to_irq(struct pci_dev *dev, struct msi_desc *msidesc,
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int pirq, const char *name, domid_t domid);
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#endif
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/* De-allocates the above mentioned physical interrupt. */
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int xen_destroy_irq(int irq);
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/* Return irq from pirq */
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int xen_irq_from_pirq(unsigned pirq);
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/* Return the pirq allocated to the irq. */
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int xen_pirq_from_irq(unsigned irq);
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/* Return the irq allocated to the gsi */
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int xen_irq_from_gsi(unsigned gsi);
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/* Determine whether to ignore this IRQ if it is passed to a guest. */
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int xen_test_irq_shared(int irq);
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/* initialize Xen IRQ subsystem */
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void xen_init_IRQ(void);
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#endif /* _XEN_EVENTS_H */
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