forked from Minki/linux
75 lines
1.7 KiB
C
75 lines
1.7 KiB
C
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/*
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* Xen Event Channels (internal header)
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*
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* Copyright (C) 2013 Citrix Systems R&D Ltd.
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*
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* This source code is licensed under the GNU General Public License,
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* Version 2 or later. See the file COPYING for more details.
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*/
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#ifndef __EVENTS_INTERNAL_H__
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#define __EVENTS_INTERNAL_H__
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/* Interrupt types. */
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enum xen_irq_type {
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IRQT_UNBOUND = 0,
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IRQT_PIRQ,
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IRQT_VIRQ,
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IRQT_IPI,
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IRQT_EVTCHN
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};
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/*
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* Packed IRQ information:
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* type - enum xen_irq_type
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* event channel - irq->event channel mapping
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* cpu - cpu this event channel is bound to
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* index - type-specific information:
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* PIRQ - vector, with MSB being "needs EIO", or physical IRQ of the HVM
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* guest, or GSI (real passthrough IRQ) of the device.
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* VIRQ - virq number
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* IPI - IPI vector
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* EVTCHN -
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*/
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struct irq_info {
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struct list_head list;
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int refcnt;
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enum xen_irq_type type; /* type */
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unsigned irq;
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unsigned short evtchn; /* event channel */
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unsigned short cpu; /* cpu bound */
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union {
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unsigned short virq;
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enum ipi_vector ipi;
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struct {
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unsigned short pirq;
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unsigned short gsi;
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unsigned char vector;
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unsigned char flags;
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uint16_t domid;
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} pirq;
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} u;
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};
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#define PIRQ_NEEDS_EOI (1 << 0)
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#define PIRQ_SHAREABLE (1 << 1)
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extern int *evtchn_to_irq;
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struct irq_info *info_for_irq(unsigned irq);
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unsigned cpu_from_irq(unsigned irq);
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unsigned cpu_from_evtchn(unsigned int evtchn);
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void xen_evtchn_port_bind_to_cpu(struct irq_info *info, int cpu);
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void clear_evtchn(int port);
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void set_evtchn(int port);
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int test_evtchn(int port);
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int test_and_set_mask(int port);
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void mask_evtchn(int port);
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void unmask_evtchn(int port);
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void xen_evtchn_handle_events(int cpu);
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#endif /* #ifndef __EVENTS_INTERNAL_H__ */
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