/* * Dynamic device configuration and creation. * * Copyright (c) 2009 CodeSourcery * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library 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 * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, see <http://www.gnu.org/licenses/>. */ #include "qdev.h" #include "monitor/monitor.h" #include "qmp-commands.h" #include "sysemu/arch_init.h" #include "qemu/config-file.h" /* * Aliases were a bad idea from the start. Let's keep them * from spreading further. */ typedef struct QDevAlias { const char *typename; const char *alias; uint32_t arch_mask; } QDevAlias; static const QDevAlias qdev_alias_table[] = { { "virtio-blk-pci", "virtio-blk", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X }, { "virtio-net-pci", "virtio-net", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X }, { "virtio-serial-pci", "virtio-serial", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X }, { "virtio-balloon-pci", "virtio-balloon", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X }, { "virtio-blk-s390", "virtio-blk", QEMU_ARCH_S390X }, { "virtio-net-s390", "virtio-net", QEMU_ARCH_S390X }, { "virtio-serial-s390", "virtio-serial", QEMU_ARCH_S390X }, { "lsi53c895a", "lsi" }, { "ich9-ahci", "ahci" }, { "kvm-pci-assign", "pci-assign" }, { } }; static const char *qdev_class_get_alias(DeviceClass *dc) { const char *typename = object_class_get_name(OBJECT_CLASS(dc)); int i; for (i = 0; qdev_alias_table[i].typename; i++) { if (qdev_alias_table[i].arch_mask && !(qdev_alias_table[i].arch_mask & arch_type)) { continue; } if (strcmp(qdev_alias_table[i].typename, typename) == 0) { return qdev_alias_table[i].alias; } } return NULL; } static bool qdev_class_has_alias(DeviceClass *dc) { return (qdev_class_get_alias(dc) != NULL); } static void qdev_print_devinfo(ObjectClass *klass, void *opaque) { DeviceClass *dc; bool *show_no_user = opaque; dc = (DeviceClass *)object_class_dynamic_cast(klass, TYPE_DEVICE); if (!dc || (show_no_user && !*show_no_user && dc->no_user)) { return; } error_printf("name \"%s\"", object_class_get_name(klass)); if (dc->bus_type) { error_printf(", bus %s", dc->bus_type); } if (qdev_class_has_alias(dc)) { error_printf(", alias \"%s\"", qdev_class_get_alias(dc)); } if (dc->desc) { error_printf(", desc \"%s\"", dc->desc); } if (dc->no_user) { error_printf(", no-user"); } error_printf("\n"); } static int set_property(const char *name, const char *value, void *opaque) { DeviceState *dev = opaque; if (strcmp(name, "driver") == 0) return 0; if (strcmp(name, "bus") == 0) return 0; if (qdev_prop_parse(dev, name, value) == -1) { return -1; } return 0; } static const char *find_typename_by_alias(const char *alias) { int i; for (i = 0; qdev_alias_table[i].alias; i++) { if (qdev_alias_table[i].arch_mask && !(qdev_alias_table[i].arch_mask & arch_type)) { continue; } if (strcmp(qdev_alias_table[i].alias, alias) == 0) { return qdev_alias_table[i].typename; } } return NULL; } int qdev_device_help(QemuOpts *opts) { const char *driver; Property *prop; ObjectClass *klass; driver = qemu_opt_get(opts, "driver"); if (driver && is_help_option(driver)) { bool show_no_user = false; object_class_foreach(qdev_print_devinfo, TYPE_DEVICE, false, &show_no_user); return 1; } if (!driver || !qemu_opt_has_help_opt(opts)) { return 0; } klass = object_class_by_name(driver); if (!klass) { const char *typename = find_typename_by_alias(driver); if (typename) { driver = typename; klass = object_class_by_name(driver); } } if (!klass) { return 0; } do { for (prop = DEVICE_CLASS(klass)->props; prop && prop->name; prop++) { /* * TODO Properties without a parser are just for dirty hacks. * qdev_prop_ptr is the only such PropertyInfo. It's marked * for removal. This conditional should be removed along with * it. */ if (!prop->info->set) { continue; /* no way to set it, don't show */ } error_printf("%s.%s=%s\n", driver, prop->name, prop->info->legacy_name ?: prop->info->name); } klass = object_class_get_parent(klass); } while (klass != object_class_by_name(TYPE_DEVICE)); return 1; } static Object *qdev_get_peripheral(void) { static Object *dev; if (dev == NULL) { dev = container_get(qdev_get_machine(), "/peripheral"); } return dev; } static Object *qdev_get_peripheral_anon(void) { static Object *dev; if (dev == NULL) { dev = container_get(qdev_get_machine(), "/peripheral-anon"); } return dev; } static void qbus_list_bus(DeviceState *dev) { BusState *child; const char *sep = " "; error_printf("child busses at \"%s\":", dev->id ? dev->id : object_get_typename(OBJECT(dev))); QLIST_FOREACH(child, &dev->child_bus, sibling) { error_printf("%s\"%s\"", sep, child->name); sep = ", "; } error_printf("\n"); } static void qbus_list_dev(BusState *bus) { BusChild *kid; const char *sep = " "; error_printf("devices at \"%s\":", bus->name); QTAILQ_FOREACH(kid, &bus->children, sibling) { DeviceState *dev = kid->child; error_printf("%s\"%s\"", sep, object_get_typename(OBJECT(dev))); if (dev->id) error_printf("/\"%s\"", dev->id); sep = ", "; } error_printf("\n"); } static BusState *qbus_find_bus(DeviceState *dev, char *elem) { BusState *child; QLIST_FOREACH(child, &dev->child_bus, sibling) { if (strcmp(child->name, elem) == 0) { return child; } } return NULL; } static DeviceState *qbus_find_dev(BusState *bus, char *elem) { BusChild *kid; /* * try to match in order: * (1) instance id, if present * (2) driver name * (3) driver alias, if present */ QTAILQ_FOREACH(kid, &bus->children, sibling) { DeviceState *dev = kid->child; if (dev->id && strcmp(dev->id, elem) == 0) { return dev; } } QTAILQ_FOREACH(kid, &bus->children, sibling) { DeviceState *dev = kid->child; if (strcmp(object_get_typename(OBJECT(dev)), elem) == 0) { return dev; } } QTAILQ_FOREACH(kid, &bus->children, sibling) { DeviceState *dev = kid->child; DeviceClass *dc = DEVICE_GET_CLASS(dev); if (qdev_class_has_alias(dc) && strcmp(qdev_class_get_alias(dc), elem) == 0) { return dev; } } return NULL; } static BusState *qbus_find_recursive(BusState *bus, const char *name, const char *bus_typename) { BusChild *kid; BusState *child, *ret; int match = 1; if (name && (strcmp(bus->name, name) != 0)) { match = 0; } if (bus_typename && !object_dynamic_cast(OBJECT(bus), bus_typename)) { match = 0; } if (match) { return bus; } QTAILQ_FOREACH(kid, &bus->children, sibling) { DeviceState *dev = kid->child; QLIST_FOREACH(child, &dev->child_bus, sibling) { ret = qbus_find_recursive(child, name, bus_typename); if (ret) { return ret; } } } return NULL; } static BusState *qbus_find(const char *path) { DeviceState *dev; BusState *bus; char elem[128]; int pos, len; /* find start element */ if (path[0] == '/') { bus = sysbus_get_default(); pos = 0; } else { if (sscanf(path, "%127[^/]%n", elem, &len) != 1) { assert(!path[0]); elem[0] = len = 0; } bus = qbus_find_recursive(sysbus_get_default(), elem, NULL); if (!bus) { qerror_report(QERR_BUS_NOT_FOUND, elem); return NULL; } pos = len; } for (;;) { assert(path[pos] == '/' || !path[pos]); while (path[pos] == '/') { pos++; } if (path[pos] == '\0') { return bus; } /* find device */ if (sscanf(path+pos, "%127[^/]%n", elem, &len) != 1) { assert(0); elem[0] = len = 0; } pos += len; dev = qbus_find_dev(bus, elem); if (!dev) { qerror_report(QERR_DEVICE_NOT_FOUND, elem); if (!monitor_cur_is_qmp()) { qbus_list_dev(bus); } return NULL; } assert(path[pos] == '/' || !path[pos]); while (path[pos] == '/') { pos++; } if (path[pos] == '\0') { /* last specified element is a device. If it has exactly * one child bus accept it nevertheless */ switch (dev->num_child_bus) { case 0: qerror_report(QERR_DEVICE_NO_BUS, elem); return NULL; case 1: return QLIST_FIRST(&dev->child_bus); default: qerror_report(QERR_DEVICE_MULTIPLE_BUSSES, elem); if (!monitor_cur_is_qmp()) { qbus_list_bus(dev); } return NULL; } } /* find bus */ if (sscanf(path+pos, "%127[^/]%n", elem, &len) != 1) { assert(0); elem[0] = len = 0; } pos += len; bus = qbus_find_bus(dev, elem); if (!bus) { qerror_report(QERR_BUS_NOT_FOUND, elem); if (!monitor_cur_is_qmp()) { qbus_list_bus(dev); } return NULL; } } } DeviceState *qdev_device_add(QemuOpts *opts) { ObjectClass *obj; DeviceClass *k; const char *driver, *path, *id; DeviceState *qdev; BusState *bus; driver = qemu_opt_get(opts, "driver"); if (!driver) { qerror_report(QERR_MISSING_PARAMETER, "driver"); return NULL; } /* find driver */ obj = object_class_by_name(driver); if (!obj) { const char *typename = find_typename_by_alias(driver); if (typename) { driver = typename; obj = object_class_by_name(driver); } } if (!obj) { qerror_report(QERR_INVALID_PARAMETER_VALUE, "driver", "device type"); return NULL; } k = DEVICE_CLASS(obj); /* find bus */ path = qemu_opt_get(opts, "bus"); if (path != NULL) { bus = qbus_find(path); if (!bus) { return NULL; } if (!object_dynamic_cast(OBJECT(bus), k->bus_type)) { qerror_report(QERR_BAD_BUS_FOR_DEVICE, driver, object_get_typename(OBJECT(bus))); return NULL; } } else { bus = qbus_find_recursive(sysbus_get_default(), NULL, k->bus_type); if (!bus) { qerror_report(QERR_NO_BUS_FOR_DEVICE, k->bus_type, driver); return NULL; } } if (qdev_hotplug && !bus->allow_hotplug) { qerror_report(QERR_BUS_NO_HOTPLUG, bus->name); return NULL; } if (!bus) { bus = sysbus_get_default(); } /* create device, set properties */ qdev = DEVICE(object_new(driver)); qdev_set_parent_bus(qdev, bus); id = qemu_opts_id(opts); if (id) { qdev->id = id; } if (qemu_opt_foreach(opts, set_property, qdev, 1) != 0) { qdev_free(qdev); return NULL; } if (qdev->id) { object_property_add_child(qdev_get_peripheral(), qdev->id, OBJECT(qdev), NULL); } else { static int anon_count; gchar *name = g_strdup_printf("device[%d]", anon_count++); object_property_add_child(qdev_get_peripheral_anon(), name, OBJECT(qdev), NULL); g_free(name); } if (qdev_init(qdev) < 0) { qerror_report(QERR_DEVICE_INIT_FAILED, driver); return NULL; } qdev->opts = opts; return qdev; } #define qdev_printf(fmt, ...) monitor_printf(mon, "%*s" fmt, indent, "", ## __VA_ARGS__) static void qbus_print(Monitor *mon, BusState *bus, int indent); static void qdev_print_props(Monitor *mon, DeviceState *dev, Property *props, int indent) { if (!props) return; for (; props->name; props++) { Error *err = NULL; char *value; char *legacy_name = g_strdup_printf("legacy-%s", props->name); if (object_property_get_type(OBJECT(dev), legacy_name, NULL)) { value = object_property_get_str(OBJECT(dev), legacy_name, &err); } else { value = object_property_print(OBJECT(dev), props->name, &err); } g_free(legacy_name); if (err) { error_free(err); continue; } qdev_printf("%s = %s\n", props->name, value && *value ? value : "<null>"); g_free(value); } } static void bus_print_dev(BusState *bus, Monitor *mon, DeviceState *dev, int indent) { BusClass *bc = BUS_GET_CLASS(bus); if (bc->print_dev) { bc->print_dev(mon, dev, indent); } } static void qdev_print(Monitor *mon, DeviceState *dev, int indent) { ObjectClass *class; BusState *child; qdev_printf("dev: %s, id \"%s\"\n", object_get_typename(OBJECT(dev)), dev->id ? dev->id : ""); indent += 2; if (dev->num_gpio_in) { qdev_printf("gpio-in %d\n", dev->num_gpio_in); } if (dev->num_gpio_out) { qdev_printf("gpio-out %d\n", dev->num_gpio_out); } class = object_get_class(OBJECT(dev)); do { qdev_print_props(mon, dev, DEVICE_CLASS(class)->props, indent); class = object_class_get_parent(class); } while (class != object_class_by_name(TYPE_DEVICE)); bus_print_dev(dev->parent_bus, mon, dev, indent); QLIST_FOREACH(child, &dev->child_bus, sibling) { qbus_print(mon, child, indent); } } static void qbus_print(Monitor *mon, BusState *bus, int indent) { BusChild *kid; qdev_printf("bus: %s\n", bus->name); indent += 2; qdev_printf("type %s\n", object_get_typename(OBJECT(bus))); QTAILQ_FOREACH(kid, &bus->children, sibling) { DeviceState *dev = kid->child; qdev_print(mon, dev, indent); } } #undef qdev_printf void do_info_qtree(Monitor *mon) { if (sysbus_get_default()) qbus_print(mon, sysbus_get_default(), 0); } void do_info_qdm(Monitor *mon) { object_class_foreach(qdev_print_devinfo, TYPE_DEVICE, false, NULL); } int do_device_add(Monitor *mon, const QDict *qdict, QObject **ret_data) { Error *local_err = NULL; QemuOpts *opts; opts = qemu_opts_from_qdict(qemu_find_opts("device"), qdict, &local_err); if (error_is_set(&local_err)) { qerror_report_err(local_err); error_free(local_err); return -1; } if (!monitor_cur_is_qmp() && qdev_device_help(opts)) { qemu_opts_del(opts); return 0; } if (!qdev_device_add(opts)) { qemu_opts_del(opts); return -1; } return 0; } void qmp_device_del(const char *id, Error **errp) { DeviceState *dev; dev = qdev_find_recursive(sysbus_get_default(), id); if (NULL == dev) { error_set(errp, QERR_DEVICE_NOT_FOUND, id); return; } qdev_unplug(dev, errp); } void qdev_machine_init(void) { qdev_get_peripheral_anon(); qdev_get_peripheral(); } QemuOptsList qemu_device_opts = { .name = "device", .implied_opt_name = "driver", .head = QTAILQ_HEAD_INITIALIZER(qemu_device_opts.head), .desc = { /* * no elements => accept any * sanity checking will happen later * when setting device properties */ { /* end of list */ } }, }; QemuOptsList qemu_global_opts = { .name = "global", .head = QTAILQ_HEAD_INITIALIZER(qemu_global_opts.head), .desc = { { .name = "driver", .type = QEMU_OPT_STRING, },{ .name = "property", .type = QEMU_OPT_STRING, },{ .name = "value", .type = QEMU_OPT_STRING, }, { /* end of list */ } }, }; int qemu_global_option(const char *str) { char driver[64], property[64]; QemuOpts *opts; int rc, offset; rc = sscanf(str, "%63[^.].%63[^=]%n", driver, property, &offset); if (rc < 2 || str[offset] != '=') { error_report("can't parse: \"%s\"", str); return -1; } opts = qemu_opts_create_nofail(&qemu_global_opts); qemu_opt_set(opts, "driver", driver); qemu_opt_set(opts, "property", property); qemu_opt_set(opts, "value", str+offset+1); return 0; }