It will allow explicitly mark device as not hotpluggable and avoid its creation with following error at realize time and destroying it afterwards anyway. Instead of it will error out even before instance of device is created. Signed-off-by: Igor Mammedov <imammedo@redhat.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Andreas Färber <afaerber@suse.de>
756 lines
20 KiB
C
756 lines
20 KiB
C
/*
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* Dynamic device configuration and creation.
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*
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* Copyright (c) 2009 CodeSourcery
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "hw/qdev.h"
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#include "hw/sysbus.h"
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#include "monitor/monitor.h"
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#include "monitor/qdev.h"
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#include "qmp-commands.h"
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#include "sysemu/arch_init.h"
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#include "qemu/config-file.h"
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/*
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* Aliases were a bad idea from the start. Let's keep them
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* from spreading further.
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*/
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typedef struct QDevAlias
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{
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const char *typename;
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const char *alias;
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uint32_t arch_mask;
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} QDevAlias;
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static const QDevAlias qdev_alias_table[] = {
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{ "virtio-blk-pci", "virtio-blk", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
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{ "virtio-net-pci", "virtio-net", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
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{ "virtio-serial-pci", "virtio-serial", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
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{ "virtio-balloon-pci", "virtio-balloon",
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QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
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{ "virtio-blk-s390", "virtio-blk", QEMU_ARCH_S390X },
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{ "virtio-net-s390", "virtio-net", QEMU_ARCH_S390X },
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{ "virtio-serial-s390", "virtio-serial", QEMU_ARCH_S390X },
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{ "lsi53c895a", "lsi" },
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{ "ich9-ahci", "ahci" },
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{ "kvm-pci-assign", "pci-assign" },
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{ }
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};
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static const char *qdev_class_get_alias(DeviceClass *dc)
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{
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const char *typename = object_class_get_name(OBJECT_CLASS(dc));
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int i;
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for (i = 0; qdev_alias_table[i].typename; i++) {
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if (qdev_alias_table[i].arch_mask &&
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!(qdev_alias_table[i].arch_mask & arch_type)) {
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continue;
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}
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if (strcmp(qdev_alias_table[i].typename, typename) == 0) {
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return qdev_alias_table[i].alias;
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}
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}
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return NULL;
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}
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static bool qdev_class_has_alias(DeviceClass *dc)
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{
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return (qdev_class_get_alias(dc) != NULL);
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}
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static void qdev_print_devinfo(DeviceClass *dc)
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{
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error_printf("name \"%s\"", object_class_get_name(OBJECT_CLASS(dc)));
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if (dc->bus_type) {
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error_printf(", bus %s", dc->bus_type);
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}
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if (qdev_class_has_alias(dc)) {
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error_printf(", alias \"%s\"", qdev_class_get_alias(dc));
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}
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if (dc->desc) {
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error_printf(", desc \"%s\"", dc->desc);
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}
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if (dc->cannot_instantiate_with_device_add_yet) {
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error_printf(", no-user");
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}
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error_printf("\n");
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}
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static gint devinfo_cmp(gconstpointer a, gconstpointer b)
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{
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return strcasecmp(object_class_get_name((ObjectClass *)a),
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object_class_get_name((ObjectClass *)b));
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}
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static void qdev_print_devinfos(bool show_no_user)
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{
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static const char *cat_name[DEVICE_CATEGORY_MAX + 1] = {
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[DEVICE_CATEGORY_BRIDGE] = "Controller/Bridge/Hub",
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[DEVICE_CATEGORY_USB] = "USB",
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[DEVICE_CATEGORY_STORAGE] = "Storage",
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[DEVICE_CATEGORY_NETWORK] = "Network",
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[DEVICE_CATEGORY_INPUT] = "Input",
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[DEVICE_CATEGORY_DISPLAY] = "Display",
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[DEVICE_CATEGORY_SOUND] = "Sound",
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[DEVICE_CATEGORY_MISC] = "Misc",
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[DEVICE_CATEGORY_MAX] = "Uncategorized",
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};
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GSList *list, *elt;
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int i;
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bool cat_printed;
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list = g_slist_sort(object_class_get_list(TYPE_DEVICE, false),
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devinfo_cmp);
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for (i = 0; i <= DEVICE_CATEGORY_MAX; i++) {
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cat_printed = false;
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for (elt = list; elt; elt = elt->next) {
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DeviceClass *dc = OBJECT_CLASS_CHECK(DeviceClass, elt->data,
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TYPE_DEVICE);
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if ((i < DEVICE_CATEGORY_MAX
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? !test_bit(i, dc->categories)
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: !bitmap_empty(dc->categories, DEVICE_CATEGORY_MAX))
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|| (!show_no_user
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&& dc->cannot_instantiate_with_device_add_yet)) {
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continue;
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}
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if (!cat_printed) {
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error_printf("%s%s devices:\n", i ? "\n" : "",
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cat_name[i]);
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cat_printed = true;
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}
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qdev_print_devinfo(dc);
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}
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}
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g_slist_free(list);
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}
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static int set_property(const char *name, const char *value, void *opaque)
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{
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Object *obj = opaque;
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Error *err = NULL;
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if (strcmp(name, "driver") == 0)
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return 0;
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if (strcmp(name, "bus") == 0)
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return 0;
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object_property_parse(obj, value, name, &err);
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if (err != NULL) {
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qerror_report_err(err);
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error_free(err);
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return -1;
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}
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return 0;
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}
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static const char *find_typename_by_alias(const char *alias)
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{
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int i;
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for (i = 0; qdev_alias_table[i].alias; i++) {
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if (qdev_alias_table[i].arch_mask &&
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!(qdev_alias_table[i].arch_mask & arch_type)) {
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continue;
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}
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if (strcmp(qdev_alias_table[i].alias, alias) == 0) {
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return qdev_alias_table[i].typename;
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}
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}
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return NULL;
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}
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int qdev_device_help(QemuOpts *opts)
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{
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Error *local_err = NULL;
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const char *driver;
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DevicePropertyInfoList *prop_list;
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DevicePropertyInfoList *prop;
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driver = qemu_opt_get(opts, "driver");
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if (driver && is_help_option(driver)) {
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qdev_print_devinfos(false);
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return 1;
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}
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if (!driver || !qemu_opt_has_help_opt(opts)) {
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return 0;
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}
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if (!object_class_by_name(driver)) {
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const char *typename = find_typename_by_alias(driver);
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if (typename) {
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driver = typename;
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}
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}
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prop_list = qmp_device_list_properties(driver, &local_err);
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if (local_err) {
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error_printf("%s\n", error_get_pretty(local_err));
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error_free(local_err);
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return 1;
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}
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for (prop = prop_list; prop; prop = prop->next) {
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error_printf("%s.%s=%s\n", driver,
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prop->value->name,
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prop->value->type);
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}
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qapi_free_DevicePropertyInfoList(prop_list);
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return 1;
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}
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static Object *qdev_get_peripheral(void)
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{
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static Object *dev;
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if (dev == NULL) {
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dev = container_get(qdev_get_machine(), "/peripheral");
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}
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return dev;
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}
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static Object *qdev_get_peripheral_anon(void)
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{
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static Object *dev;
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if (dev == NULL) {
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dev = container_get(qdev_get_machine(), "/peripheral-anon");
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}
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return dev;
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}
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static void qbus_list_bus(DeviceState *dev)
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{
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BusState *child;
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const char *sep = " ";
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error_printf("child busses at \"%s\":",
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dev->id ? dev->id : object_get_typename(OBJECT(dev)));
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QLIST_FOREACH(child, &dev->child_bus, sibling) {
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error_printf("%s\"%s\"", sep, child->name);
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sep = ", ";
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}
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error_printf("\n");
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}
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static void qbus_list_dev(BusState *bus)
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{
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BusChild *kid;
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const char *sep = " ";
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error_printf("devices at \"%s\":", bus->name);
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QTAILQ_FOREACH(kid, &bus->children, sibling) {
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DeviceState *dev = kid->child;
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error_printf("%s\"%s\"", sep, object_get_typename(OBJECT(dev)));
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if (dev->id)
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error_printf("/\"%s\"", dev->id);
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sep = ", ";
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}
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error_printf("\n");
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}
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static BusState *qbus_find_bus(DeviceState *dev, char *elem)
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{
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BusState *child;
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QLIST_FOREACH(child, &dev->child_bus, sibling) {
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if (strcmp(child->name, elem) == 0) {
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return child;
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}
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}
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return NULL;
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}
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static DeviceState *qbus_find_dev(BusState *bus, char *elem)
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{
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BusChild *kid;
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/*
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* try to match in order:
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* (1) instance id, if present
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* (2) driver name
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* (3) driver alias, if present
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*/
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QTAILQ_FOREACH(kid, &bus->children, sibling) {
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DeviceState *dev = kid->child;
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if (dev->id && strcmp(dev->id, elem) == 0) {
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return dev;
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}
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}
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QTAILQ_FOREACH(kid, &bus->children, sibling) {
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DeviceState *dev = kid->child;
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if (strcmp(object_get_typename(OBJECT(dev)), elem) == 0) {
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return dev;
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}
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}
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QTAILQ_FOREACH(kid, &bus->children, sibling) {
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DeviceState *dev = kid->child;
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DeviceClass *dc = DEVICE_GET_CLASS(dev);
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if (qdev_class_has_alias(dc) &&
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strcmp(qdev_class_get_alias(dc), elem) == 0) {
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return dev;
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}
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}
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return NULL;
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}
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static BusState *qbus_find_recursive(BusState *bus, const char *name,
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const char *bus_typename)
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{
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BusClass *bus_class = BUS_GET_CLASS(bus);
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BusChild *kid;
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BusState *child, *ret;
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int match = 1;
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if (name && (strcmp(bus->name, name) != 0)) {
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match = 0;
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} else if (bus_typename && !object_dynamic_cast(OBJECT(bus), bus_typename)) {
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match = 0;
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} else if ((bus_class->max_dev != 0) && (bus_class->max_dev <= bus->max_index)) {
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if (name != NULL) {
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/* bus was explicitly specified: return an error. */
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qerror_report(ERROR_CLASS_GENERIC_ERROR, "Bus '%s' is full",
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bus->name);
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return NULL;
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} else {
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/* bus was not specified: try to find another one. */
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match = 0;
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}
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}
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if (match) {
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return bus;
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}
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QTAILQ_FOREACH(kid, &bus->children, sibling) {
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DeviceState *dev = kid->child;
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QLIST_FOREACH(child, &dev->child_bus, sibling) {
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ret = qbus_find_recursive(child, name, bus_typename);
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if (ret) {
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return ret;
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}
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}
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}
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return NULL;
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}
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static BusState *qbus_find(const char *path)
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{
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DeviceState *dev;
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BusState *bus;
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char elem[128];
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int pos, len;
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/* find start element */
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if (path[0] == '/') {
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bus = sysbus_get_default();
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pos = 0;
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} else {
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if (sscanf(path, "%127[^/]%n", elem, &len) != 1) {
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assert(!path[0]);
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elem[0] = len = 0;
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}
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bus = qbus_find_recursive(sysbus_get_default(), elem, NULL);
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if (!bus) {
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qerror_report(QERR_BUS_NOT_FOUND, elem);
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return NULL;
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}
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pos = len;
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}
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for (;;) {
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assert(path[pos] == '/' || !path[pos]);
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while (path[pos] == '/') {
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pos++;
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}
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if (path[pos] == '\0') {
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return bus;
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}
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/* find device */
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if (sscanf(path+pos, "%127[^/]%n", elem, &len) != 1) {
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g_assert_not_reached();
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elem[0] = len = 0;
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}
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pos += len;
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dev = qbus_find_dev(bus, elem);
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if (!dev) {
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qerror_report(QERR_DEVICE_NOT_FOUND, elem);
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if (!monitor_cur_is_qmp()) {
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qbus_list_dev(bus);
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}
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return NULL;
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}
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assert(path[pos] == '/' || !path[pos]);
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while (path[pos] == '/') {
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pos++;
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}
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if (path[pos] == '\0') {
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/* last specified element is a device. If it has exactly
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* one child bus accept it nevertheless */
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switch (dev->num_child_bus) {
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case 0:
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qerror_report(ERROR_CLASS_GENERIC_ERROR,
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"Device '%s' has no child bus", elem);
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return NULL;
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case 1:
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return QLIST_FIRST(&dev->child_bus);
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default:
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qerror_report(ERROR_CLASS_GENERIC_ERROR,
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"Device '%s' has multiple child busses", elem);
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if (!monitor_cur_is_qmp()) {
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qbus_list_bus(dev);
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}
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return NULL;
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}
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}
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/* find bus */
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if (sscanf(path+pos, "%127[^/]%n", elem, &len) != 1) {
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g_assert_not_reached();
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elem[0] = len = 0;
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}
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pos += len;
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bus = qbus_find_bus(dev, elem);
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if (!bus) {
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qerror_report(QERR_BUS_NOT_FOUND, elem);
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if (!monitor_cur_is_qmp()) {
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qbus_list_bus(dev);
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}
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return NULL;
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}
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}
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}
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DeviceState *qdev_device_add(QemuOpts *opts)
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{
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ObjectClass *oc;
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DeviceClass *dc;
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const char *driver, *path, *id;
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DeviceState *dev;
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BusState *bus = NULL;
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Error *err = NULL;
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driver = qemu_opt_get(opts, "driver");
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if (!driver) {
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qerror_report(QERR_MISSING_PARAMETER, "driver");
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return NULL;
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}
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/* find driver */
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oc = object_class_by_name(driver);
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if (!oc) {
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const char *typename = find_typename_by_alias(driver);
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if (typename) {
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driver = typename;
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oc = object_class_by_name(driver);
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}
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}
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if (!object_class_dynamic_cast(oc, TYPE_DEVICE)) {
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qerror_report(ERROR_CLASS_GENERIC_ERROR,
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"'%s' is not a valid device model name", driver);
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return NULL;
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}
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if (object_class_is_abstract(oc)) {
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qerror_report(QERR_INVALID_PARAMETER_VALUE, "driver",
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"non-abstract device type");
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return NULL;
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}
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dc = DEVICE_CLASS(oc);
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if (dc->cannot_instantiate_with_device_add_yet ||
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(qdev_hotplug && !dc->hotpluggable)) {
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qerror_report(QERR_INVALID_PARAMETER_VALUE, "driver",
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"pluggable device type");
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return NULL;
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}
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/* find bus */
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path = qemu_opt_get(opts, "bus");
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if (path != NULL) {
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bus = qbus_find(path);
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if (!bus) {
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return NULL;
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}
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if (!object_dynamic_cast(OBJECT(bus), dc->bus_type)) {
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qerror_report(ERROR_CLASS_GENERIC_ERROR,
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"Device '%s' can't go on a %s bus",
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driver, object_get_typename(OBJECT(bus)));
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return NULL;
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}
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} else if (dc->bus_type != NULL) {
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bus = qbus_find_recursive(sysbus_get_default(), NULL, dc->bus_type);
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if (!bus) {
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qerror_report(ERROR_CLASS_GENERIC_ERROR,
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"No '%s' bus found for device '%s'",
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dc->bus_type, driver);
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return NULL;
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}
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}
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if (qdev_hotplug && bus && !qbus_is_hotpluggable(bus)) {
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qerror_report(QERR_BUS_NO_HOTPLUG, bus->name);
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return NULL;
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}
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/* create device */
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|
dev = DEVICE(object_new(driver));
|
|
|
|
if (bus) {
|
|
qdev_set_parent_bus(dev, bus);
|
|
}
|
|
|
|
id = qemu_opts_id(opts);
|
|
if (id) {
|
|
dev->id = id;
|
|
}
|
|
|
|
if (dev->id) {
|
|
object_property_add_child(qdev_get_peripheral(), dev->id,
|
|
OBJECT(dev), 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(dev), NULL);
|
|
g_free(name);
|
|
}
|
|
|
|
/* set properties */
|
|
if (qemu_opt_foreach(opts, set_property, dev, 1) != 0) {
|
|
object_unparent(OBJECT(dev));
|
|
object_unref(OBJECT(dev));
|
|
return NULL;
|
|
}
|
|
|
|
dev->opts = opts;
|
|
object_property_set_bool(OBJECT(dev), true, "realized", &err);
|
|
if (err != NULL) {
|
|
qerror_report_err(err);
|
|
error_free(err);
|
|
dev->opts = NULL;
|
|
object_unparent(OBJECT(dev));
|
|
object_unref(OBJECT(dev));
|
|
qerror_report(QERR_DEVICE_INIT_FAILED, driver);
|
|
return NULL;
|
|
}
|
|
return dev;
|
|
}
|
|
|
|
|
|
#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, true, &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;
|
|
NamedGPIOList *ngl;
|
|
|
|
qdev_printf("dev: %s, id \"%s\"\n", object_get_typename(OBJECT(dev)),
|
|
dev->id ? dev->id : "");
|
|
indent += 2;
|
|
QLIST_FOREACH(ngl, &dev->gpios, node) {
|
|
if (ngl->num_in) {
|
|
qdev_printf("gpio-in \"%s\" %d\n", ngl->name ? ngl->name : "",
|
|
ngl->num_in);
|
|
}
|
|
if (ngl->num_out) {
|
|
qdev_printf("gpio-out \"%s\" %d\n", ngl->name ? ngl->name : "",
|
|
ngl->num_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, const QDict *qdict)
|
|
{
|
|
if (sysbus_get_default())
|
|
qbus_print(mon, sysbus_get_default(), 0);
|
|
}
|
|
|
|
void do_info_qdm(Monitor *mon, const QDict *qdict)
|
|
{
|
|
qdev_print_devinfos(true);
|
|
}
|
|
|
|
int do_device_add(Monitor *mon, const QDict *qdict, QObject **ret_data)
|
|
{
|
|
Error *local_err = NULL;
|
|
QemuOpts *opts;
|
|
DeviceState *dev;
|
|
|
|
opts = qemu_opts_from_qdict(qemu_find_opts("device"), qdict, &local_err);
|
|
if (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;
|
|
}
|
|
dev = qdev_device_add(opts);
|
|
if (!dev) {
|
|
qemu_opts_del(opts);
|
|
return -1;
|
|
}
|
|
object_unref(OBJECT(dev));
|
|
return 0;
|
|
}
|
|
|
|
void qmp_device_del(const char *id, Error **errp)
|
|
{
|
|
DeviceState *dev;
|
|
|
|
dev = qdev_find_recursive(sysbus_get_default(), id);
|
|
if (!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(&qemu_global_opts, NULL, 0, &error_abort);
|
|
qemu_opt_set(opts, "driver", driver);
|
|
qemu_opt_set(opts, "property", property);
|
|
qemu_opt_set(opts, "value", str+offset+1);
|
|
return 0;
|
|
}
|