diff options
Diffstat (limited to 'hw/xen/xen-legacy-backend.c')
| -rw-r--r-- | hw/xen/xen-legacy-backend.c | 847 |
1 files changed, 847 insertions, 0 deletions
diff --git a/hw/xen/xen-legacy-backend.c b/hw/xen/xen-legacy-backend.c new file mode 100644 index 0000000000..41419763c8 --- /dev/null +++ b/hw/xen/xen-legacy-backend.c @@ -0,0 +1,847 @@ +/* + * xen backend driver infrastructure + * (c) 2008 Gerd Hoffmann <kraxel@redhat.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; under version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, see <http://www.gnu.org/licenses/>. + * + * Contributions after 2012-01-13 are licensed under the terms of the + * GNU GPL, version 2 or (at your option) any later version. + */ + +/* + * TODO: add some xenbus / xenstore concepts overview here. + */ + +#include "qemu/osdep.h" +#include <sys/signal.h> + +#include "hw/hw.h" +#include "hw/sysbus.h" +#include "hw/boards.h" +#include "qemu/log.h" +#include "qapi/error.h" +#include "hw/xen/xen-legacy-backend.h" +#include "hw/xen/xen_pvdev.h" +#include "monitor/qdev.h" + +#include <xen/grant_table.h> + +DeviceState *xen_sysdev; +BusState *xen_sysbus; + +/* ------------------------------------------------------------- */ + +/* public */ +struct xs_handle *xenstore; +const char *xen_protocol; + +/* private */ +static bool xen_feature_grant_copy; +static int debug; + +int xenstore_write_be_str(struct XenLegacyDevice *xendev, const char *node, + const char *val) +{ + return xenstore_write_str(xendev->be, node, val); +} + +int xenstore_write_be_int(struct XenLegacyDevice *xendev, const char *node, + int ival) +{ + return xenstore_write_int(xendev->be, node, ival); +} + +int xenstore_write_be_int64(struct XenLegacyDevice *xendev, const char *node, + int64_t ival) +{ + return xenstore_write_int64(xendev->be, node, ival); +} + +char *xenstore_read_be_str(struct XenLegacyDevice *xendev, const char *node) +{ + return xenstore_read_str(xendev->be, node); +} + +int xenstore_read_be_int(struct XenLegacyDevice *xendev, const char *node, + int *ival) +{ + return xenstore_read_int(xendev->be, node, ival); +} + +char *xenstore_read_fe_str(struct XenLegacyDevice *xendev, const char *node) +{ + return xenstore_read_str(xendev->fe, node); +} + +int xenstore_read_fe_int(struct XenLegacyDevice *xendev, const char *node, + int *ival) +{ + return xenstore_read_int(xendev->fe, node, ival); +} + +int xenstore_read_fe_uint64(struct XenLegacyDevice *xendev, const char *node, + uint64_t *uval) +{ + return xenstore_read_uint64(xendev->fe, node, uval); +} + +/* ------------------------------------------------------------- */ + +int xen_be_set_state(struct XenLegacyDevice *xendev, enum xenbus_state state) +{ + int rc; + + rc = xenstore_write_be_int(xendev, "state", state); + if (rc < 0) { + return rc; + } + xen_pv_printf(xendev, 1, "backend state: %s -> %s\n", + xenbus_strstate(xendev->be_state), xenbus_strstate(state)); + xendev->be_state = state; + return 0; +} + +void xen_be_set_max_grant_refs(struct XenLegacyDevice *xendev, + unsigned int nr_refs) +{ + assert(xendev->ops->flags & DEVOPS_FLAG_NEED_GNTDEV); + + if (xengnttab_set_max_grants(xendev->gnttabdev, nr_refs)) { + xen_pv_printf(xendev, 0, "xengnttab_set_max_grants failed: %s\n", + strerror(errno)); + } +} + +void *xen_be_map_grant_refs(struct XenLegacyDevice *xendev, uint32_t *refs, + unsigned int nr_refs, int prot) +{ + void *ptr; + + assert(xendev->ops->flags & DEVOPS_FLAG_NEED_GNTDEV); + + ptr = xengnttab_map_domain_grant_refs(xendev->gnttabdev, nr_refs, + xen_domid, refs, prot); + if (!ptr) { + xen_pv_printf(xendev, 0, + "xengnttab_map_domain_grant_refs failed: %s\n", + strerror(errno)); + } + + return ptr; +} + +void xen_be_unmap_grant_refs(struct XenLegacyDevice *xendev, void *ptr, + unsigned int nr_refs) +{ + assert(xendev->ops->flags & DEVOPS_FLAG_NEED_GNTDEV); + + if (xengnttab_unmap(xendev->gnttabdev, ptr, nr_refs)) { + xen_pv_printf(xendev, 0, "xengnttab_unmap failed: %s\n", + strerror(errno)); + } +} + +static int compat_copy_grant_refs(struct XenLegacyDevice *xendev, + bool to_domain, + XenGrantCopySegment segs[], + unsigned int nr_segs) +{ + uint32_t *refs = g_new(uint32_t, nr_segs); + int prot = to_domain ? PROT_WRITE : PROT_READ; + void *pages; + unsigned int i; + + for (i = 0; i < nr_segs; i++) { + XenGrantCopySegment *seg = &segs[i]; + + refs[i] = to_domain ? + seg->dest.foreign.ref : seg->source.foreign.ref; + } + + pages = xengnttab_map_domain_grant_refs(xendev->gnttabdev, nr_segs, + xen_domid, refs, prot); + if (!pages) { + xen_pv_printf(xendev, 0, + "xengnttab_map_domain_grant_refs failed: %s\n", + strerror(errno)); + g_free(refs); + return -1; + } + + for (i = 0; i < nr_segs; i++) { + XenGrantCopySegment *seg = &segs[i]; + void *page = pages + (i * XC_PAGE_SIZE); + + if (to_domain) { + memcpy(page + seg->dest.foreign.offset, seg->source.virt, + seg->len); + } else { + memcpy(seg->dest.virt, page + seg->source.foreign.offset, + seg->len); + } + } + + if (xengnttab_unmap(xendev->gnttabdev, pages, nr_segs)) { + xen_pv_printf(xendev, 0, "xengnttab_unmap failed: %s\n", + strerror(errno)); + } + + g_free(refs); + return 0; +} + +int xen_be_copy_grant_refs(struct XenLegacyDevice *xendev, + bool to_domain, + XenGrantCopySegment segs[], + unsigned int nr_segs) +{ + xengnttab_grant_copy_segment_t *xengnttab_segs; + unsigned int i; + int rc; + + assert(xendev->ops->flags & DEVOPS_FLAG_NEED_GNTDEV); + + if (!xen_feature_grant_copy) { + return compat_copy_grant_refs(xendev, to_domain, segs, nr_segs); + } + + xengnttab_segs = g_new0(xengnttab_grant_copy_segment_t, nr_segs); + + for (i = 0; i < nr_segs; i++) { + XenGrantCopySegment *seg = &segs[i]; + xengnttab_grant_copy_segment_t *xengnttab_seg = &xengnttab_segs[i]; + + if (to_domain) { + xengnttab_seg->flags = GNTCOPY_dest_gref; + xengnttab_seg->dest.foreign.domid = xen_domid; + xengnttab_seg->dest.foreign.ref = seg->dest.foreign.ref; + xengnttab_seg->dest.foreign.offset = seg->dest.foreign.offset; + xengnttab_seg->source.virt = seg->source.virt; + } else { + xengnttab_seg->flags = GNTCOPY_source_gref; + xengnttab_seg->source.foreign.domid = xen_domid; + xengnttab_seg->source.foreign.ref = seg->source.foreign.ref; + xengnttab_seg->source.foreign.offset = + seg->source.foreign.offset; + xengnttab_seg->dest.virt = seg->dest.virt; + } + + xengnttab_seg->len = seg->len; + } + + rc = xengnttab_grant_copy(xendev->gnttabdev, nr_segs, xengnttab_segs); + + if (rc) { + xen_pv_printf(xendev, 0, "xengnttab_copy failed: %s\n", + strerror(errno)); + } + + for (i = 0; i < nr_segs; i++) { + xengnttab_grant_copy_segment_t *xengnttab_seg = + &xengnttab_segs[i]; + + if (xengnttab_seg->status != GNTST_okay) { + xen_pv_printf(xendev, 0, "segment[%u] status: %d\n", i, + xengnttab_seg->status); + rc = -1; + } + } + + g_free(xengnttab_segs); + return rc; +} + +/* + * get xen backend device, allocate a new one if it doesn't exist. + */ +static struct XenLegacyDevice *xen_be_get_xendev(const char *type, int dom, + int dev, + struct XenDevOps *ops) +{ + struct XenLegacyDevice *xendev; + + xendev = xen_pv_find_xendev(type, dom, dev); + if (xendev) { + return xendev; + } + + /* init new xendev */ + xendev = g_malloc0(ops->size); + object_initialize(&xendev->qdev, ops->size, TYPE_XENBACKEND); + OBJECT(xendev)->free = g_free; + qdev_set_parent_bus(DEVICE(xendev), xen_sysbus); + qdev_set_id(DEVICE(xendev), g_strdup_printf("xen-%s-%d", type, dev)); + qdev_init_nofail(DEVICE(xendev)); + object_unref(OBJECT(xendev)); + + xendev->type = type; + xendev->dom = dom; + xendev->dev = dev; + xendev->ops = ops; + + snprintf(xendev->be, sizeof(xendev->be), "backend/%s/%d/%d", + xendev->type, xendev->dom, xendev->dev); + snprintf(xendev->name, sizeof(xendev->name), "%s-%d", + xendev->type, xendev->dev); + + xendev->debug = debug; + xendev->local_port = -1; + + xendev->evtchndev = xenevtchn_open(NULL, 0); + if (xendev->evtchndev == NULL) { + xen_pv_printf(NULL, 0, "can't open evtchn device\n"); + qdev_unplug(DEVICE(xendev), NULL); + return NULL; + } + qemu_set_cloexec(xenevtchn_fd(xendev->evtchndev)); + + xen_pv_insert_xendev(xendev); + + if (xendev->ops->alloc) { + xendev->ops->alloc(xendev); + } + + return xendev; +} + + +/* + * Sync internal data structures on xenstore updates. + * Node specifies the changed field. node = NULL means + * update all fields (used for initialization). + */ +static void xen_be_backend_changed(struct XenLegacyDevice *xendev, + const char *node) +{ + if (node == NULL || strcmp(node, "online") == 0) { + if (xenstore_read_be_int(xendev, "online", &xendev->online) == -1) { + xendev->online = 0; + } + } + + if (node) { + xen_pv_printf(xendev, 2, "backend update: %s\n", node); + if (xendev->ops->backend_changed) { + xendev->ops->backend_changed(xendev, node); + } + } +} + +static void xen_be_frontend_changed(struct XenLegacyDevice *xendev, + const char *node) +{ + int fe_state; + + if (node == NULL || strcmp(node, "state") == 0) { + if (xenstore_read_fe_int(xendev, "state", &fe_state) == -1) { + fe_state = XenbusStateUnknown; + } + if (xendev->fe_state != fe_state) { + xen_pv_printf(xendev, 1, "frontend state: %s -> %s\n", + xenbus_strstate(xendev->fe_state), + xenbus_strstate(fe_state)); + } + xendev->fe_state = fe_state; + } + if (node == NULL || strcmp(node, "protocol") == 0) { + g_free(xendev->protocol); + xendev->protocol = xenstore_read_fe_str(xendev, "protocol"); + if (xendev->protocol) { + xen_pv_printf(xendev, 1, "frontend protocol: %s\n", + xendev->protocol); + } + } + + if (node) { + xen_pv_printf(xendev, 2, "frontend update: %s\n", node); + if (xendev->ops->frontend_changed) { + xendev->ops->frontend_changed(xendev, node); + } + } +} + +/* ------------------------------------------------------------- */ +/* Check for possible state transitions and perform them. */ + +/* + * Initial xendev setup. Read frontend path, register watch for it. + * Should succeed once xend finished setting up the backend device. + * + * Also sets initial state (-> Initializing) when done. Which + * only affects the xendev->be_state variable as xenbus should + * already be put into that state by xend. + */ +static int xen_be_try_setup(struct XenLegacyDevice *xendev) +{ + char token[XEN_BUFSIZE]; + int be_state; + + if (xenstore_read_be_int(xendev, "state", &be_state) == -1) { + xen_pv_printf(xendev, 0, "reading backend state failed\n"); + return -1; + } + + if (be_state != XenbusStateInitialising) { + xen_pv_printf(xendev, 0, "initial backend state is wrong (%s)\n", + xenbus_strstate(be_state)); + return -1; + } + + xendev->fe = xenstore_read_be_str(xendev, "frontend"); + if (xendev->fe == NULL) { + xen_pv_printf(xendev, 0, "reading frontend path failed\n"); + return -1; + } + + /* setup frontend watch */ + snprintf(token, sizeof(token), "fe:%p", xendev); + if (!xs_watch(xenstore, xendev->fe, token)) { + xen_pv_printf(xendev, 0, "watching frontend path (%s) failed\n", + xendev->fe); + return -1; + } + xen_be_set_state(xendev, XenbusStateInitialising); + + xen_be_backend_changed(xendev, NULL); + xen_be_frontend_changed(xendev, NULL); + return 0; +} + +/* + * Try initialize xendev. Prepare everything the backend can do + * without synchronizing with the frontend. Fakes hotplug-status. No + * hotplug involved here because this is about userspace drivers, thus + * there are kernel backend devices which could invoke hotplug. + * + * Goes to InitWait on success. + */ +static int xen_be_try_init(struct XenLegacyDevice *xendev) +{ + int rc = 0; + + if (!xendev->online) { + xen_pv_printf(xendev, 1, "not online\n"); + return -1; + } + + if (xendev->ops->init) { + rc = xendev->ops->init(xendev); + } + if (rc != 0) { + xen_pv_printf(xendev, 1, "init() failed\n"); + return rc; + } + + xenstore_write_be_str(xendev, "hotplug-status", "connected"); + xen_be_set_state(xendev, XenbusStateInitWait); + return 0; +} + +/* + * Try to initialise xendev. Depends on the frontend being ready + * for it (shared ring and evtchn info in xenstore, state being + * Initialised or Connected). + * + * Goes to Connected on success. + */ +static int xen_be_try_initialise(struct XenLegacyDevice *xendev) +{ + int rc = 0; + + if (xendev->fe_state != XenbusStateInitialised && + xendev->fe_state != XenbusStateConnected) { + if (xendev->ops->flags & DEVOPS_FLAG_IGNORE_STATE) { + xen_pv_printf(xendev, 2, "frontend not ready, ignoring\n"); + } else { + xen_pv_printf(xendev, 2, "frontend not ready (yet)\n"); + return -1; + } + } + + if (xendev->ops->flags & DEVOPS_FLAG_NEED_GNTDEV) { + xendev->gnttabdev = xengnttab_open(NULL, 0); + if (xendev->gnttabdev == NULL) { + xen_pv_printf(NULL, 0, "can't open gnttab device\n"); + return -1; + } + } else { + xendev->gnttabdev = NULL; + } + + if (xendev->ops->initialise) { + rc = xendev->ops->initialise(xendev); + } + if (rc != 0) { + xen_pv_printf(xendev, 0, "initialise() failed\n"); + return rc; + } + + xen_be_set_state(xendev, XenbusStateConnected); + return 0; +} + +/* + * Try to let xendev know that it is connected. Depends on the + * frontend being Connected. Note that this may be called more + * than once since the backend state is not modified. + */ +static void xen_be_try_connected(struct XenLegacyDevice *xendev) +{ + if (!xendev->ops->connected) { + return; + } + + if (xendev->fe_state != XenbusStateConnected) { + if (xendev->ops->flags & DEVOPS_FLAG_IGNORE_STATE) { + xen_pv_printf(xendev, 2, "frontend not ready, ignoring\n"); + } else { + xen_pv_printf(xendev, 2, "frontend not ready (yet)\n"); + return; + } + } + + xendev->ops->connected(xendev); +} + +/* + * Teardown connection. + * + * Goes to Closed when done. + */ +static void xen_be_disconnect(struct XenLegacyDevice *xendev, + enum xenbus_state state) +{ + if (xendev->be_state != XenbusStateClosing && + xendev->be_state != XenbusStateClosed && + xendev->ops->disconnect) { + xendev->ops->disconnect(xendev); + } + if (xendev->gnttabdev) { + xengnttab_close(xendev->gnttabdev); + xendev->gnttabdev = NULL; + } + if (xendev->be_state != state) { + xen_be_set_state(xendev, state); + } +} + +/* + * Try to reset xendev, for reconnection by another frontend instance. + */ +static int xen_be_try_reset(struct XenLegacyDevice *xendev) +{ + if (xendev->fe_state != XenbusStateInitialising) { + return -1; + } + + xen_pv_printf(xendev, 1, "device reset (for re-connect)\n"); + xen_be_set_state(xendev, XenbusStateInitialising); + return 0; +} + +/* + * state change dispatcher function + */ +void xen_be_check_state(struct XenLegacyDevice *xendev) +{ + int rc = 0; + + /* frontend may request shutdown from almost anywhere */ + if (xendev->fe_state == XenbusStateClosing || + xendev->fe_state == XenbusStateClosed) { + xen_be_disconnect(xendev, xendev->fe_state); + return; + } + + /* check for possible backend state transitions */ + for (;;) { + switch (xendev->be_state) { + case XenbusStateUnknown: + rc = xen_be_try_setup(xendev); + break; + case XenbusStateInitialising: + rc = xen_be_try_init(xendev); + break; + case XenbusStateInitWait: + rc = xen_be_try_initialise(xendev); + break; + case XenbusStateConnected: + /* xendev->be_state doesn't change */ + xen_be_try_connected(xendev); + rc = -1; + break; + case XenbusStateClosed: + rc = xen_be_try_reset(xendev); + break; + default: + rc = -1; + } + if (rc != 0) { + break; + } + } +} + +/* ------------------------------------------------------------- */ + +static int xenstore_scan(const char *type, int dom, struct XenDevOps *ops) +{ + struct XenLegacyDevice *xendev; + char path[XEN_BUFSIZE], token[XEN_BUFSIZE]; + char **dev = NULL; + unsigned int cdev, j; + + /* setup watch */ + snprintf(token, sizeof(token), "be:%p:%d:%p", type, dom, ops); + snprintf(path, sizeof(path), "backend/%s/%d", type, dom); + if (!xs_watch(xenstore, path, token)) { + xen_pv_printf(NULL, 0, "xen be: watching backend path (%s) failed\n", + path); + return -1; + } + + /* look for backends */ + dev = xs_directory(xenstore, 0, path, &cdev); + if (!dev) { + return 0; + } + for (j = 0; j < cdev; j++) { + xendev = xen_be_get_xendev(type, dom, atoi(dev[j]), ops); + if (xendev == NULL) { + continue; + } + xen_be_check_state(xendev); + } + free(dev); + return 0; +} + +void xenstore_update_be(char *watch, char *type, int dom, + struct XenDevOps *ops) +{ + struct XenLegacyDevice *xendev; + char path[XEN_BUFSIZE], *bepath; + unsigned int len, dev; + + len = snprintf(path, sizeof(path), "backend/%s/%d", type, dom); + if (strncmp(path, watch, len) != 0) { + return; + } + if (sscanf(watch + len, "/%u/%255s", &dev, path) != 2) { + strcpy(path, ""); + if (sscanf(watch + len, "/%u", &dev) != 1) { + dev = -1; + } + } + if (dev == -1) { + return; + } + + xendev = xen_be_get_xendev(type, dom, dev, ops); + if (xendev != NULL) { + bepath = xs_read(xenstore, 0, xendev->be, &len); + if (bepath == NULL) { + xen_pv_del_xendev(xendev); + } else { + free(bepath); + xen_be_backend_changed(xendev, path); + xen_be_check_state(xendev); + } + } +} + +void xenstore_update_fe(char *watch, struct XenLegacyDevice *xendev) +{ + char *node; + unsigned int len; + + len = strlen(xendev->fe); + if (strncmp(xendev->fe, watch, len) != 0) { + return; + } + if (watch[len] != '/') { + return; + } + node = watch + len + 1; + + xen_be_frontend_changed(xendev, node); + xen_be_check_state(xendev); +} +/* -------------------------------------------------------------------- */ + +int xen_be_init(void) +{ + xengnttab_handle *gnttabdev; + + xenstore = xs_daemon_open(); + if (!xenstore) { + xen_pv_printf(NULL, 0, "can't connect to xenstored\n"); + return -1; + } + + qemu_set_fd_handler(xs_fileno(xenstore), xenstore_update, NULL, NULL); + + if (xen_xc == NULL || xen_fmem == NULL) { + /* Check if xen_init() have been called */ + goto err; + } + + gnttabdev = xengnttab_open(NULL, 0); + if (gnttabdev != NULL) { + if (xengnttab_grant_copy(gnttabdev, 0, NULL) == 0) { + xen_feature_grant_copy = true; + } + xengnttab_close(gnttabdev); + } + + xen_sysdev = qdev_create(NULL, TYPE_XENSYSDEV); + qdev_init_nofail(xen_sysdev); + xen_sysbus = qbus_create(TYPE_XENSYSBUS, DEVICE(xen_sysdev), "xen-sysbus"); + qbus_set_bus_hotplug_handler(xen_sysbus, &error_abort); + + return 0; + +err: + qemu_set_fd_handler(xs_fileno(xenstore), NULL, NULL, NULL); + xs_daemon_close(xenstore); + xenstore = NULL; + + return -1; +} + +static void xen_set_dynamic_sysbus(void) +{ + Object *machine = qdev_get_machine(); + ObjectClass *oc = object_get_class(machine); + MachineClass *mc = MACHINE_CLASS(oc); + + machine_class_allow_dynamic_sysbus_dev(mc, TYPE_XENSYSDEV); +} + +int xen_be_register(const char *type, struct XenDevOps *ops) +{ + char path[50]; + int rc; + + if (ops->backend_register) { + rc = ops->backend_register(); + if (rc) { + return rc; + } + } + + snprintf(path, sizeof(path), "device-model/%u/backends/%s", xen_domid, + type); + xenstore_mkdir(path, XS_PERM_NONE); + + return xenstore_scan(type, xen_domid, ops); +} + +void xen_be_register_common(void) +{ + xen_set_dynamic_sysbus(); + + xen_be_register("console", &xen_console_ops); + xen_be_register("vkbd", &xen_kbdmouse_ops); + xen_be_register("qdisk", &xen_blkdev_ops); +#ifdef CONFIG_VIRTFS + xen_be_register("9pfs", &xen_9pfs_ops); +#endif +#ifdef CONFIG_USB_LIBUSB + xen_be_register("qusb", &xen_usb_ops); +#endif +} + +int xen_be_bind_evtchn(struct XenLegacyDevice *xendev) +{ + if (xendev->local_port != -1) { + return 0; + } + xendev->local_port = xenevtchn_bind_interdomain + (xendev->evtchndev, xendev->dom, xendev->remote_port); + if (xendev->local_port == -1) { + xen_pv_printf(xendev, 0, "xenevtchn_bind_interdomain failed\n"); + return -1; + } + xen_pv_printf(xendev, 2, "bind evtchn port %d\n", xendev->local_port); + qemu_set_fd_handler(xenevtchn_fd(xendev->evtchndev), + xen_pv_evtchn_event, NULL, xendev); + return 0; +} + + +static Property xendev_properties[] = { + DEFINE_PROP_END_OF_LIST(), +}; + +static void xendev_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + + dc->props = xendev_properties; + set_bit(DEVICE_CATEGORY_MISC, dc->categories); + /* xen-backend devices can be plugged/unplugged dynamically */ + dc->user_creatable = true; +} + +static const TypeInfo xendev_type_info = { + .name = TYPE_XENBACKEND, + .parent = TYPE_XENSYSDEV, + .class_init = xendev_class_init, + .instance_size = sizeof(struct XenLegacyDevice), +}; + +static void xen_sysbus_class_init(ObjectClass *klass, void *data) +{ + HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(klass); + + hc->unplug = qdev_simple_device_unplug_cb; +} + +static const TypeInfo xensysbus_info = { + .name = TYPE_XENSYSBUS, + .parent = TYPE_BUS, + .class_init = xen_sysbus_class_init, + .interfaces = (InterfaceInfo[]) { + { TYPE_HOTPLUG_HANDLER }, + { } + } +}; + +static Property xen_sysdev_properties[] = { + {/* end of property list */}, +}; + +static void xen_sysdev_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + + dc->props = xen_sysdev_properties; + dc->bus_type = TYPE_XENSYSBUS; +} + +static const TypeInfo xensysdev_info = { + .name = TYPE_XENSYSDEV, + .parent = TYPE_SYS_BUS_DEVICE, + .instance_size = sizeof(SysBusDevice), + .class_init = xen_sysdev_class_init, +}; + +static void xenbe_register_types(void) +{ + type_register_static(&xensysbus_info); + type_register_static(&xensysdev_info); + type_register_static(&xendev_type_info); +} + +type_init(xenbe_register_types) |