523b6b3aba
The primary Xen console is special. The guest's side is set up for it by the toolstack automatically and not by the standard PV init sequence. Accordingly, its *frontend* doesn't appear in …/device/console/0 either; instead it appears under …/console in the guest's XenStore node. To allow the Xen console driver to override the frontend path for the primary console, add a method to the XenDeviceClass which can be used instead of the standard xen_device_get_frontend_path() Signed-off-by: David Woodhouse <dwmw@amazon.co.uk> Reviewed-by: Paul Durrant <paul@xen.org>
136 lines
4.6 KiB
C
136 lines
4.6 KiB
C
/*
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* Copyright (c) 2018 Citrix Systems Inc.
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*/
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#ifndef HW_XEN_BUS_H
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#define HW_XEN_BUS_H
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#include "hw/xen/xen_backend_ops.h"
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#include "hw/sysbus.h"
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#include "qemu/notify.h"
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#include "qom/object.h"
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typedef struct XenEventChannel XenEventChannel;
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struct XenDevice {
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DeviceState qdev;
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domid_t frontend_id;
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char *name;
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struct qemu_xs_handle *xsh;
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char *backend_path, *frontend_path;
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enum xenbus_state backend_state, frontend_state;
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Notifier exit;
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struct qemu_xs_watch *backend_state_watch, *frontend_state_watch;
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bool backend_online;
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struct qemu_xs_watch *backend_online_watch;
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xengnttab_handle *xgth;
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bool inactive;
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QLIST_HEAD(, XenEventChannel) event_channels;
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QLIST_ENTRY(XenDevice) list;
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};
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typedef struct XenDevice XenDevice;
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typedef char *(*XenDeviceGetFrontendPath)(XenDevice *xendev, Error **errp);
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typedef char *(*XenDeviceGetName)(XenDevice *xendev, Error **errp);
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typedef void (*XenDeviceRealize)(XenDevice *xendev, Error **errp);
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typedef void (*XenDeviceFrontendChanged)(XenDevice *xendev,
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enum xenbus_state frontend_state,
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Error **errp);
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typedef void (*XenDeviceUnrealize)(XenDevice *xendev);
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struct XenDeviceClass {
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/*< private >*/
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DeviceClass parent_class;
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/*< public >*/
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const char *backend;
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const char *device;
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XenDeviceGetFrontendPath get_frontend_path;
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XenDeviceGetName get_name;
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XenDeviceRealize realize;
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XenDeviceFrontendChanged frontend_changed;
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XenDeviceUnrealize unrealize;
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};
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#define TYPE_XEN_DEVICE "xen-device"
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OBJECT_DECLARE_TYPE(XenDevice, XenDeviceClass, XEN_DEVICE)
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struct XenBus {
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BusState qbus;
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domid_t backend_id;
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struct qemu_xs_handle *xsh;
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unsigned int backend_types;
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struct qemu_xs_watch **backend_watch;
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QLIST_HEAD(, XenDevice) inactive_devices;
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};
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struct XenBusClass {
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/*< private >*/
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BusClass parent_class;
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};
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#define TYPE_XEN_BUS "xen-bus"
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OBJECT_DECLARE_TYPE(XenBus, XenBusClass,
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XEN_BUS)
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void xen_bus_init(void);
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void xen_device_backend_set_state(XenDevice *xendev,
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enum xenbus_state state);
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enum xenbus_state xen_device_backend_get_state(XenDevice *xendev);
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void xen_device_backend_printf(XenDevice *xendev, const char *key,
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const char *fmt, ...)
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G_GNUC_PRINTF(3, 4);
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void xen_device_frontend_printf(XenDevice *xendev, const char *key,
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const char *fmt, ...)
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G_GNUC_PRINTF(3, 4);
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int xen_device_frontend_scanf(XenDevice *xendev, const char *key,
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const char *fmt, ...)
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G_GNUC_SCANF(3, 4);
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void xen_device_set_max_grant_refs(XenDevice *xendev, unsigned int nr_refs,
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Error **errp);
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void *xen_device_map_grant_refs(XenDevice *xendev, uint32_t *refs,
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unsigned int nr_refs, int prot,
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Error **errp);
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void xen_device_unmap_grant_refs(XenDevice *xendev, void *map, uint32_t *refs,
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unsigned int nr_refs, Error **errp);
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typedef struct XenDeviceGrantCopySegment {
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union {
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void *virt;
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struct {
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uint32_t ref;
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off_t offset;
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} foreign;
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} source, dest;
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size_t len;
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} XenDeviceGrantCopySegment;
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void xen_device_copy_grant_refs(XenDevice *xendev, bool to_domain,
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XenDeviceGrantCopySegment segs[],
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unsigned int nr_segs, Error **errp);
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typedef bool (*XenEventHandler)(void *opaque);
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XenEventChannel *xen_device_bind_event_channel(XenDevice *xendev,
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unsigned int port,
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XenEventHandler handler,
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void *opaque, Error **errp);
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void xen_device_set_event_channel_context(XenDevice *xendev,
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XenEventChannel *channel,
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AioContext *ctx,
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Error **errp);
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void xen_device_notify_event_channel(XenDevice *xendev,
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XenEventChannel *channel,
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Error **errp);
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void xen_device_unbind_event_channel(XenDevice *xendev,
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XenEventChannel *channel,
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Error **errp);
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#endif /* HW_XEN_BUS_H */
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