hw/i386/kvm/xen_evtchn.h

   1 /*
   2  * QEMU Xen emulation: Event channel support
   3  *
   4  * Copyright © 2022 Amazon.com, Inc. or its affiliates. All Rights Reserved.
   5  *
   6  * Authors: David Woodhouse <dwmw2@infradead.org>
   7  *
   8  * This work is licensed under the terms of the GNU GPL, version 2 or later.
   9  * See the COPYING file in the top-level directory.
  10  */
  11
  12 #ifndef QEMU_XEN_EVTCHN_H
  13 #define QEMU_XEN_EVTCHN_H
  14
  15 #include "hw/sysbus.h"
  16
  17 typedef uint32_t evtchn_port_t;
  18
  19 void xen_evtchn_create(unsigned int nr_gsis, qemu_irq *system_gsis);
  20 int xen_evtchn_soft_reset(void);
  21 int xen_evtchn_set_callback_param(uint64_t param);
  22 void xen_evtchn_set_callback_level(int level);
  23
  24 int xen_evtchn_set_port(uint16_t port);
  25
  26 bool xen_evtchn_set_gsi(int gsi, int level);
  27 void xen_evtchn_snoop_msi(PCIDevice *dev, bool is_msix, unsigned int vector,
  28                           uint64_t addr, uint32_t data, bool is_masked);
  29 void xen_evtchn_remove_pci_device(PCIDevice *dev);
  30 struct kvm_irq_routing_entry;
  31 int xen_evtchn_translate_pirq_msi(struct kvm_irq_routing_entry *route,
  32                                   uint64_t address, uint32_t data);
  33 bool xen_evtchn_deliver_pirq_msi(uint64_t address, uint32_t data);
  34
  35
  36 /*
  37  * These functions mirror the libxenevtchn library API, providing the QEMU
  38  * backend side of "interdomain" event channels.
  39  */
  40 struct xenevtchn_handle;
  41 struct xenevtchn_handle *xen_be_evtchn_open(void);
  42 int xen_be_evtchn_bind_interdomain(struct xenevtchn_handle *xc, uint32_t domid,
  43                                    evtchn_port_t guest_port);
  44 int xen_be_evtchn_unbind(struct xenevtchn_handle *xc, evtchn_port_t port);
  45 int xen_be_evtchn_close(struct xenevtchn_handle *xc);
  46 int xen_be_evtchn_fd(struct xenevtchn_handle *xc);
  47 int xen_be_evtchn_notify(struct xenevtchn_handle *xc, evtchn_port_t port);
  48 int xen_be_evtchn_unmask(struct xenevtchn_handle *xc, evtchn_port_t port);
  49 int xen_be_evtchn_pending(struct xenevtchn_handle *xc);
  50 /* Apart from this which is a local addition */
  51 int xen_be_evtchn_get_guest_port(struct xenevtchn_handle *xc);
  52
  53 struct evtchn_status;
  54 struct evtchn_close;
  55 struct evtchn_unmask;
  56 struct evtchn_bind_virq;
  57 struct evtchn_bind_pirq;
  58 struct evtchn_bind_ipi;
  59 struct evtchn_send;
  60 struct evtchn_alloc_unbound;
  61 struct evtchn_bind_interdomain;
  62 struct evtchn_bind_vcpu;
  63 struct evtchn_reset;
  64 int xen_evtchn_status_op(struct evtchn_status *status);
  65 int xen_evtchn_close_op(struct evtchn_close *close);
  66 int xen_evtchn_unmask_op(struct evtchn_unmask *unmask);
  67 int xen_evtchn_bind_virq_op(struct evtchn_bind_virq *virq);
  68 int xen_evtchn_bind_pirq_op(struct evtchn_bind_pirq *pirq);
  69 int xen_evtchn_bind_ipi_op(struct evtchn_bind_ipi *ipi);
  70 int xen_evtchn_send_op(struct evtchn_send *send);
  71 int xen_evtchn_alloc_unbound_op(struct evtchn_alloc_unbound *alloc);
  72 int xen_evtchn_bind_interdomain_op(struct evtchn_bind_interdomain *interdomain);
  73 int xen_evtchn_bind_vcpu_op(struct evtchn_bind_vcpu *vcpu);
  74 int xen_evtchn_reset_op(struct evtchn_reset *reset);
  75
  76 struct physdev_map_pirq;
  77 struct physdev_unmap_pirq;
  78 struct physdev_eoi;
  79 struct physdev_irq_status_query;
  80 struct physdev_get_free_pirq;
  81 int xen_physdev_map_pirq(struct physdev_map_pirq *map);
  82 int xen_physdev_unmap_pirq(struct physdev_unmap_pirq *unmap);
  83 int xen_physdev_eoi_pirq(struct physdev_eoi *eoi);
  84 int xen_physdev_query_pirq(struct physdev_irq_status_query *query);
  85 int xen_physdev_get_free_pirq(struct physdev_get_free_pirq *get);
  86
  87 #endif /* QEMU_XEN_EVTCHN_H */