217c7f01ad
Add blocker to prevent hot-unplug of devices TYPE_VFIO_USER_SERVER, which is introduced shortly, attaches itself to a PCIDevice on which it depends. If the attached PCIDevice gets removed while the server in use, it could cause it crash. To prevent this, TYPE_VFIO_USER_SERVER adds an unplug blocker for the PCIDevice. Signed-off-by: Elena Ufimtseva <elena.ufimtseva@oracle.com> Signed-off-by: John G Johnson <john.g.johnson@oracle.com> Signed-off-by: Jagannathan Raman <jag.raman@oracle.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Message-id: c41ef80b7cc063314d629737bed2159e5713f2e0.1655151679.git.jag.raman@oracle.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
1067 lines
31 KiB
C
1067 lines
31 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 2.1 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 "qemu/osdep.h"
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#include "hw/sysbus.h"
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#include "monitor/hmp.h"
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#include "monitor/monitor.h"
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#include "monitor/qdev.h"
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#include "sysemu/arch_init.h"
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#include "qapi/error.h"
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#include "qapi/qapi-commands-qdev.h"
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#include "qapi/qmp/dispatch.h"
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#include "qapi/qmp/qdict.h"
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#include "qapi/qmp/qerror.h"
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#include "qapi/qmp/qstring.h"
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#include "qapi/qobject-input-visitor.h"
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#include "qemu/config-file.h"
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#include "qemu/error-report.h"
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#include "qemu/help_option.h"
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#include "qemu/option.h"
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#include "qemu/qemu-print.h"
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#include "qemu/option_int.h"
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#include "sysemu/block-backend.h"
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#include "migration/misc.h"
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#include "migration/migration.h"
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#include "qemu/cutils.h"
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#include "hw/qdev-properties.h"
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#include "hw/clock.h"
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#include "hw/boards.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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/* default virtio transport per architecture */
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#define QEMU_ARCH_VIRTIO_PCI (QEMU_ARCH_ALPHA | QEMU_ARCH_ARM | \
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QEMU_ARCH_HPPA | QEMU_ARCH_I386 | \
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QEMU_ARCH_MIPS | QEMU_ARCH_PPC | \
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QEMU_ARCH_RISCV | QEMU_ARCH_SH4 | \
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QEMU_ARCH_SPARC | QEMU_ARCH_XTENSA | \
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QEMU_ARCH_LOONGARCH)
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#define QEMU_ARCH_VIRTIO_CCW (QEMU_ARCH_S390X)
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#define QEMU_ARCH_VIRTIO_MMIO (QEMU_ARCH_M68K)
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/* Please keep this table sorted by typename. */
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static const QDevAlias qdev_alias_table[] = {
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{ "AC97", "ac97" }, /* -soundhw name */
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{ "e1000", "e1000-82540em" },
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{ "ES1370", "es1370" }, /* -soundhw name */
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{ "ich9-ahci", "ahci" },
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{ "lsi53c895a", "lsi" },
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{ "virtio-9p-device", "virtio-9p", QEMU_ARCH_VIRTIO_MMIO },
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{ "virtio-9p-ccw", "virtio-9p", QEMU_ARCH_VIRTIO_CCW },
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{ "virtio-9p-pci", "virtio-9p", QEMU_ARCH_VIRTIO_PCI },
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{ "virtio-balloon-device", "virtio-balloon", QEMU_ARCH_VIRTIO_MMIO },
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{ "virtio-balloon-ccw", "virtio-balloon", QEMU_ARCH_VIRTIO_CCW },
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{ "virtio-balloon-pci", "virtio-balloon", QEMU_ARCH_VIRTIO_PCI },
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{ "virtio-blk-device", "virtio-blk", QEMU_ARCH_VIRTIO_MMIO },
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{ "virtio-blk-ccw", "virtio-blk", QEMU_ARCH_VIRTIO_CCW },
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{ "virtio-blk-pci", "virtio-blk", QEMU_ARCH_VIRTIO_PCI },
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{ "virtio-gpu-device", "virtio-gpu", QEMU_ARCH_VIRTIO_MMIO },
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{ "virtio-gpu-ccw", "virtio-gpu", QEMU_ARCH_VIRTIO_CCW },
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{ "virtio-gpu-pci", "virtio-gpu", QEMU_ARCH_VIRTIO_PCI },
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{ "virtio-gpu-gl-device", "virtio-gpu-gl", QEMU_ARCH_VIRTIO_MMIO },
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{ "virtio-gpu-gl-pci", "virtio-gpu-gl", QEMU_ARCH_VIRTIO_PCI },
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{ "virtio-input-host-device", "virtio-input-host", QEMU_ARCH_VIRTIO_MMIO },
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{ "virtio-input-host-ccw", "virtio-input-host", QEMU_ARCH_VIRTIO_CCW },
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{ "virtio-input-host-pci", "virtio-input-host", QEMU_ARCH_VIRTIO_PCI },
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{ "virtio-iommu-pci", "virtio-iommu", QEMU_ARCH_VIRTIO_PCI },
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{ "virtio-keyboard-device", "virtio-keyboard", QEMU_ARCH_VIRTIO_MMIO },
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{ "virtio-keyboard-ccw", "virtio-keyboard", QEMU_ARCH_VIRTIO_CCW },
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{ "virtio-keyboard-pci", "virtio-keyboard", QEMU_ARCH_VIRTIO_PCI },
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{ "virtio-mouse-device", "virtio-mouse", QEMU_ARCH_VIRTIO_MMIO },
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{ "virtio-mouse-ccw", "virtio-mouse", QEMU_ARCH_VIRTIO_CCW },
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{ "virtio-mouse-pci", "virtio-mouse", QEMU_ARCH_VIRTIO_PCI },
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{ "virtio-net-device", "virtio-net", QEMU_ARCH_VIRTIO_MMIO },
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{ "virtio-net-ccw", "virtio-net", QEMU_ARCH_VIRTIO_CCW },
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{ "virtio-net-pci", "virtio-net", QEMU_ARCH_VIRTIO_PCI },
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{ "virtio-rng-device", "virtio-rng", QEMU_ARCH_VIRTIO_MMIO },
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{ "virtio-rng-ccw", "virtio-rng", QEMU_ARCH_VIRTIO_CCW },
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{ "virtio-rng-pci", "virtio-rng", QEMU_ARCH_VIRTIO_PCI },
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{ "virtio-scsi-device", "virtio-scsi", QEMU_ARCH_VIRTIO_MMIO },
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{ "virtio-scsi-ccw", "virtio-scsi", QEMU_ARCH_VIRTIO_CCW },
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{ "virtio-scsi-pci", "virtio-scsi", QEMU_ARCH_VIRTIO_PCI },
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{ "virtio-serial-device", "virtio-serial", QEMU_ARCH_VIRTIO_MMIO },
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{ "virtio-serial-ccw", "virtio-serial", QEMU_ARCH_VIRTIO_CCW },
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{ "virtio-serial-pci", "virtio-serial", QEMU_ARCH_VIRTIO_PCI},
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{ "virtio-tablet-device", "virtio-tablet", QEMU_ARCH_VIRTIO_MMIO },
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{ "virtio-tablet-ccw", "virtio-tablet", QEMU_ARCH_VIRTIO_CCW },
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{ "virtio-tablet-pci", "virtio-tablet", QEMU_ARCH_VIRTIO_PCI },
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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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qemu_printf("name \"%s\"", object_class_get_name(OBJECT_CLASS(dc)));
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if (dc->bus_type) {
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qemu_printf(", bus %s", dc->bus_type);
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}
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if (qdev_class_has_alias(dc)) {
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qemu_printf(", alias \"%s\"", qdev_class_get_alias(dc));
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}
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if (dc->desc) {
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qemu_printf(", desc \"%s\"", dc->desc);
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}
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if (!dc->user_creatable) {
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qemu_printf(", no-user");
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}
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qemu_printf("\n");
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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_CPU] = "CPU",
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[DEVICE_CATEGORY_WATCHDOG]= "Watchdog",
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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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module_load_qom_all();
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list = object_class_get_list_sorted(TYPE_DEVICE, false);
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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->user_creatable)) {
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continue;
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}
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if (!cat_printed) {
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qemu_printf("%s%s devices:\n", i ? "\n" : "", 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 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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static DeviceClass *qdev_get_device_class(const char **driver, Error **errp)
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{
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ObjectClass *oc;
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DeviceClass *dc;
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const char *original_name = *driver;
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oc = module_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 = module_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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if (*driver != original_name) {
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error_setg(errp, "'%s' (alias '%s') is not a valid device model"
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" name", original_name, *driver);
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} else {
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error_setg(errp, "'%s' is not a valid device model name", *driver);
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}
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return NULL;
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}
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if (object_class_is_abstract(oc)) {
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error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "driver",
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"a 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->user_creatable ||
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(phase_check(PHASE_MACHINE_READY) && !dc->hotpluggable)) {
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error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "driver",
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"a pluggable device type");
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return NULL;
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}
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if (object_class_dynamic_cast(oc, TYPE_SYS_BUS_DEVICE)) {
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/* sysbus devices need to be allowed by the machine */
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MachineClass *mc = MACHINE_CLASS(object_get_class(qdev_get_machine()));
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if (!device_type_is_dynamic_sysbus(mc, *driver)) {
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error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "driver",
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"a dynamic sysbus device type for the machine");
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return NULL;
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}
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}
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return dc;
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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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ObjectPropertyInfoList *prop_list;
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ObjectPropertyInfoList *prop;
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GPtrArray *array;
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int i;
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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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goto error;
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}
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if (prop_list) {
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qemu_printf("%s options:\n", driver);
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} else {
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qemu_printf("There are no options for %s.\n", driver);
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}
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array = g_ptr_array_new();
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for (prop = prop_list; prop; prop = prop->next) {
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g_ptr_array_add(array,
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object_property_help(prop->value->name,
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prop->value->type,
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prop->value->default_value,
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prop->value->description));
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}
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g_ptr_array_sort(array, (GCompareFunc)qemu_pstrcmp0);
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for (i = 0; i < array->len; i++) {
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qemu_printf("%s\n", (char *)array->pdata[i]);
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}
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g_ptr_array_set_free_func(array, g_free);
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g_ptr_array_free(array, true);
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qapi_free_ObjectPropertyInfoList(prop_list);
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return 1;
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error:
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error_report_err(local_err);
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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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|
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static void qbus_error_append_bus_list_hint(DeviceState *dev,
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Error *const *errp)
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{
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BusState *child;
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const char *sep = " ";
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|
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error_append_hint(errp, "child buses 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_append_hint(errp, "%s\"%s\"", sep, child->name);
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sep = ", ";
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}
|
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error_append_hint(errp, "\n");
|
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}
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|
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static void qbus_error_append_dev_list_hint(BusState *bus,
|
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Error *const *errp)
|
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{
|
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BusChild *kid;
|
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const char *sep = " ";
|
|
|
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error_append_hint(errp, "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_append_hint(errp, "%s\"%s\"", sep,
|
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object_get_typename(OBJECT(dev)));
|
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if (dev->id) {
|
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error_append_hint(errp, "/\"%s\"", dev->id);
|
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}
|
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sep = ", ";
|
|
}
|
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error_append_hint(errp, "\n");
|
|
}
|
|
|
|
static BusState *qbus_find_bus(DeviceState *dev, char *elem)
|
|
{
|
|
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;
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
static DeviceState *qbus_find_dev(BusState *bus, char *elem)
|
|
{
|
|
BusChild *kid;
|
|
|
|
/*
|
|
* try to match in order:
|
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* (1) instance id, if present
|
|
* (2) driver name
|
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* (3) driver alias, if present
|
|
*/
|
|
QTAILQ_FOREACH(kid, &bus->children, sibling) {
|
|
DeviceState *dev = kid->child;
|
|
if (dev->id && strcmp(dev->id, elem) == 0) {
|
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return dev;
|
|
}
|
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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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|
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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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|
}
|
|
|
|
static inline bool qbus_is_full(BusState *bus)
|
|
{
|
|
BusClass *bus_class;
|
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|
|
if (bus->full) {
|
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return true;
|
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}
|
|
bus_class = BUS_GET_CLASS(bus);
|
|
return bus_class->max_dev && bus->num_children >= bus_class->max_dev;
|
|
}
|
|
|
|
/*
|
|
* Search the tree rooted at @bus for a bus.
|
|
* If @name, search for a bus with that name. Note that bus names
|
|
* need not be unique. Yes, that's screwed up.
|
|
* Else search for a bus that is a subtype of @bus_typename.
|
|
* If more than one exists, prefer one that can take another device.
|
|
* Return the bus if found, else %NULL.
|
|
*/
|
|
static BusState *qbus_find_recursive(BusState *bus, const char *name,
|
|
const char *bus_typename)
|
|
{
|
|
BusChild *kid;
|
|
BusState *pick, *child, *ret;
|
|
bool match;
|
|
|
|
assert(name || bus_typename);
|
|
if (name) {
|
|
match = !strcmp(bus->name, name);
|
|
} else {
|
|
match = !!object_dynamic_cast(OBJECT(bus), bus_typename);
|
|
}
|
|
|
|
if (match && !qbus_is_full(bus)) {
|
|
return bus; /* root matches and isn't full */
|
|
}
|
|
|
|
pick = match ? bus : NULL;
|
|
|
|
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 && !qbus_is_full(ret)) {
|
|
return ret; /* a descendant matches and isn't full */
|
|
}
|
|
if (ret && !pick) {
|
|
pick = ret;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* root or a descendant matches, but is full */
|
|
return pick;
|
|
}
|
|
|
|
static BusState *qbus_find(const char *path, Error **errp)
|
|
{
|
|
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) {
|
|
error_setg(errp, "Bus '%s' not found", elem);
|
|
return NULL;
|
|
}
|
|
pos = len;
|
|
}
|
|
|
|
for (;;) {
|
|
assert(path[pos] == '/' || !path[pos]);
|
|
while (path[pos] == '/') {
|
|
pos++;
|
|
}
|
|
if (path[pos] == '\0') {
|
|
break;
|
|
}
|
|
|
|
/* find device */
|
|
if (sscanf(path+pos, "%127[^/]%n", elem, &len) != 1) {
|
|
g_assert_not_reached();
|
|
elem[0] = len = 0;
|
|
}
|
|
pos += len;
|
|
dev = qbus_find_dev(bus, elem);
|
|
if (!dev) {
|
|
error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
|
|
"Device '%s' not found", elem);
|
|
qbus_error_append_dev_list_hint(bus, errp);
|
|
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 */
|
|
if (dev->num_child_bus == 1) {
|
|
bus = QLIST_FIRST(&dev->child_bus);
|
|
break;
|
|
}
|
|
if (dev->num_child_bus) {
|
|
error_setg(errp, "Device '%s' has multiple child buses",
|
|
elem);
|
|
qbus_error_append_bus_list_hint(dev, errp);
|
|
} else {
|
|
error_setg(errp, "Device '%s' has no child bus", elem);
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/* find bus */
|
|
if (sscanf(path+pos, "%127[^/]%n", elem, &len) != 1) {
|
|
g_assert_not_reached();
|
|
elem[0] = len = 0;
|
|
}
|
|
pos += len;
|
|
bus = qbus_find_bus(dev, elem);
|
|
if (!bus) {
|
|
error_setg(errp, "Bus '%s' not found", elem);
|
|
qbus_error_append_bus_list_hint(dev, errp);
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
if (qbus_is_full(bus)) {
|
|
error_setg(errp, "Bus '%s' is full", path);
|
|
return NULL;
|
|
}
|
|
return bus;
|
|
}
|
|
|
|
/* Takes ownership of @id, will be freed when deleting the device */
|
|
const char *qdev_set_id(DeviceState *dev, char *id, Error **errp)
|
|
{
|
|
ObjectProperty *prop;
|
|
|
|
assert(!dev->id && !dev->realized);
|
|
|
|
/*
|
|
* object_property_[try_]add_child() below will assert the device
|
|
* has no parent
|
|
*/
|
|
if (id) {
|
|
prop = object_property_try_add_child(qdev_get_peripheral(), id,
|
|
OBJECT(dev), NULL);
|
|
if (prop) {
|
|
dev->id = id;
|
|
} else {
|
|
error_setg(errp, "Duplicate device ID '%s'", id);
|
|
g_free(id);
|
|
return NULL;
|
|
}
|
|
} else {
|
|
static int anon_count;
|
|
gchar *name = g_strdup_printf("device[%d]", anon_count++);
|
|
prop = object_property_add_child(qdev_get_peripheral_anon(), name,
|
|
OBJECT(dev));
|
|
g_free(name);
|
|
}
|
|
|
|
return prop->name;
|
|
}
|
|
|
|
DeviceState *qdev_device_add_from_qdict(const QDict *opts,
|
|
bool from_json, Error **errp)
|
|
{
|
|
ERRP_GUARD();
|
|
DeviceClass *dc;
|
|
const char *driver, *path;
|
|
char *id;
|
|
DeviceState *dev = NULL;
|
|
BusState *bus = NULL;
|
|
|
|
driver = qdict_get_try_str(opts, "driver");
|
|
if (!driver) {
|
|
error_setg(errp, QERR_MISSING_PARAMETER, "driver");
|
|
return NULL;
|
|
}
|
|
|
|
/* find driver */
|
|
dc = qdev_get_device_class(&driver, errp);
|
|
if (!dc) {
|
|
return NULL;
|
|
}
|
|
|
|
/* find bus */
|
|
path = qdict_get_try_str(opts, "bus");
|
|
if (path != NULL) {
|
|
bus = qbus_find(path, errp);
|
|
if (!bus) {
|
|
return NULL;
|
|
}
|
|
if (!object_dynamic_cast(OBJECT(bus), dc->bus_type)) {
|
|
error_setg(errp, "Device '%s' can't go on %s bus",
|
|
driver, object_get_typename(OBJECT(bus)));
|
|
return NULL;
|
|
}
|
|
} else if (dc->bus_type != NULL) {
|
|
bus = qbus_find_recursive(sysbus_get_default(), NULL, dc->bus_type);
|
|
if (!bus || qbus_is_full(bus)) {
|
|
error_setg(errp, "No '%s' bus found for device '%s'",
|
|
dc->bus_type, driver);
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
if (qdev_should_hide_device(opts, from_json, errp)) {
|
|
if (bus && !qbus_is_hotpluggable(bus)) {
|
|
error_setg(errp, QERR_BUS_NO_HOTPLUG, bus->name);
|
|
}
|
|
return NULL;
|
|
} else if (*errp) {
|
|
return NULL;
|
|
}
|
|
|
|
if (phase_check(PHASE_MACHINE_READY) && bus && !qbus_is_hotpluggable(bus)) {
|
|
error_setg(errp, QERR_BUS_NO_HOTPLUG, bus->name);
|
|
return NULL;
|
|
}
|
|
|
|
if (!migration_is_idle()) {
|
|
error_setg(errp, "device_add not allowed while migrating");
|
|
return NULL;
|
|
}
|
|
|
|
/* create device */
|
|
dev = qdev_new(driver);
|
|
|
|
/* Check whether the hotplug is allowed by the machine */
|
|
if (phase_check(PHASE_MACHINE_READY)) {
|
|
if (!qdev_hotplug_allowed(dev, errp)) {
|
|
goto err_del_dev;
|
|
}
|
|
|
|
if (!bus && !qdev_get_machine_hotplug_handler(dev)) {
|
|
/* No bus, no machine hotplug handler --> device is not hotpluggable */
|
|
error_setg(errp, "Device '%s' can not be hotplugged on this machine",
|
|
driver);
|
|
goto err_del_dev;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* set dev's parent and register its id.
|
|
* If it fails it means the id is already taken.
|
|
*/
|
|
id = g_strdup(qdict_get_try_str(opts, "id"));
|
|
if (!qdev_set_id(dev, id, errp)) {
|
|
goto err_del_dev;
|
|
}
|
|
|
|
/* set properties */
|
|
dev->opts = qdict_clone_shallow(opts);
|
|
qdict_del(dev->opts, "driver");
|
|
qdict_del(dev->opts, "bus");
|
|
qdict_del(dev->opts, "id");
|
|
|
|
object_set_properties_from_keyval(&dev->parent_obj, dev->opts, from_json,
|
|
errp);
|
|
if (*errp) {
|
|
goto err_del_dev;
|
|
}
|
|
|
|
if (!qdev_realize(DEVICE(dev), bus, errp)) {
|
|
goto err_del_dev;
|
|
}
|
|
return dev;
|
|
|
|
err_del_dev:
|
|
if (dev) {
|
|
object_unparent(OBJECT(dev));
|
|
object_unref(OBJECT(dev));
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/* Takes ownership of @opts on success */
|
|
DeviceState *qdev_device_add(QemuOpts *opts, Error **errp)
|
|
{
|
|
QDict *qdict = qemu_opts_to_qdict(opts, NULL);
|
|
DeviceState *ret;
|
|
|
|
ret = qdev_device_add_from_qdict(qdict, false, errp);
|
|
if (ret) {
|
|
qemu_opts_del(opts);
|
|
}
|
|
qobject_unref(qdict);
|
|
return ret;
|
|
}
|
|
|
|
#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++) {
|
|
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, NULL);
|
|
} else {
|
|
value = object_property_print(OBJECT(dev), props->name, true,
|
|
NULL);
|
|
}
|
|
g_free(legacy_name);
|
|
|
|
if (!value) {
|
|
continue;
|
|
}
|
|
qdev_printf("%s = %s\n", props->name,
|
|
*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;
|
|
NamedClockList *ncl;
|
|
|
|
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);
|
|
}
|
|
}
|
|
QLIST_FOREACH(ncl, &dev->clocks, node) {
|
|
g_autofree char *freq_str = clock_display_freq(ncl->clock);
|
|
qdev_printf("clock-%s%s \"%s\" freq_hz=%s\n",
|
|
ncl->output ? "out" : "in",
|
|
ncl->alias ? " (alias)" : "",
|
|
ncl->name, freq_str);
|
|
}
|
|
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 hmp_info_qtree(Monitor *mon, const QDict *qdict)
|
|
{
|
|
if (sysbus_get_default())
|
|
qbus_print(mon, sysbus_get_default(), 0);
|
|
}
|
|
|
|
void hmp_info_qdm(Monitor *mon, const QDict *qdict)
|
|
{
|
|
qdev_print_devinfos(true);
|
|
}
|
|
|
|
void qmp_device_add(QDict *qdict, QObject **ret_data, Error **errp)
|
|
{
|
|
QemuOpts *opts;
|
|
DeviceState *dev;
|
|
|
|
opts = qemu_opts_from_qdict(qemu_find_opts("device"), qdict, errp);
|
|
if (!opts) {
|
|
return;
|
|
}
|
|
if (!monitor_cur_is_qmp() && qdev_device_help(opts)) {
|
|
qemu_opts_del(opts);
|
|
return;
|
|
}
|
|
dev = qdev_device_add(opts, errp);
|
|
|
|
/*
|
|
* Drain all pending RCU callbacks. This is done because
|
|
* some bus related operations can delay a device removal
|
|
* (in this case this can happen if device is added and then
|
|
* removed due to a configuration error)
|
|
* to a RCU callback, but user might expect that this interface
|
|
* will finish its job completely once qmp command returns result
|
|
* to the user
|
|
*/
|
|
drain_call_rcu();
|
|
|
|
if (!dev) {
|
|
qemu_opts_del(opts);
|
|
return;
|
|
}
|
|
object_unref(OBJECT(dev));
|
|
}
|
|
|
|
static DeviceState *find_device_state(const char *id, Error **errp)
|
|
{
|
|
Object *obj = object_resolve_path_at(qdev_get_peripheral(), id);
|
|
DeviceState *dev;
|
|
|
|
if (!obj) {
|
|
error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
|
|
"Device '%s' not found", id);
|
|
return NULL;
|
|
}
|
|
|
|
dev = (DeviceState *)object_dynamic_cast(obj, TYPE_DEVICE);
|
|
if (!dev) {
|
|
error_setg(errp, "%s is not a hotpluggable device", id);
|
|
return NULL;
|
|
}
|
|
|
|
return dev;
|
|
}
|
|
|
|
void qdev_unplug(DeviceState *dev, Error **errp)
|
|
{
|
|
DeviceClass *dc = DEVICE_GET_CLASS(dev);
|
|
HotplugHandler *hotplug_ctrl;
|
|
HotplugHandlerClass *hdc;
|
|
Error *local_err = NULL;
|
|
|
|
if (qdev_unplug_blocked(dev, errp)) {
|
|
return;
|
|
}
|
|
|
|
if (dev->parent_bus && !qbus_is_hotpluggable(dev->parent_bus)) {
|
|
error_setg(errp, QERR_BUS_NO_HOTPLUG, dev->parent_bus->name);
|
|
return;
|
|
}
|
|
|
|
if (!dc->hotpluggable) {
|
|
error_setg(errp, QERR_DEVICE_NO_HOTPLUG,
|
|
object_get_typename(OBJECT(dev)));
|
|
return;
|
|
}
|
|
|
|
if (!migration_is_idle() && !dev->allow_unplug_during_migration) {
|
|
error_setg(errp, "device_del not allowed while migrating");
|
|
return;
|
|
}
|
|
|
|
qdev_hot_removed = true;
|
|
|
|
hotplug_ctrl = qdev_get_hotplug_handler(dev);
|
|
/* hotpluggable device MUST have HotplugHandler, if it doesn't
|
|
* then something is very wrong with it */
|
|
g_assert(hotplug_ctrl);
|
|
|
|
/* If device supports async unplug just request it to be done,
|
|
* otherwise just remove it synchronously */
|
|
hdc = HOTPLUG_HANDLER_GET_CLASS(hotplug_ctrl);
|
|
if (hdc->unplug_request) {
|
|
hotplug_handler_unplug_request(hotplug_ctrl, dev, &local_err);
|
|
} else {
|
|
hotplug_handler_unplug(hotplug_ctrl, dev, &local_err);
|
|
if (!local_err) {
|
|
object_unparent(OBJECT(dev));
|
|
}
|
|
}
|
|
error_propagate(errp, local_err);
|
|
}
|
|
|
|
void qmp_device_del(const char *id, Error **errp)
|
|
{
|
|
DeviceState *dev = find_device_state(id, errp);
|
|
if (dev != NULL) {
|
|
if (dev->pending_deleted_event &&
|
|
(dev->pending_deleted_expires_ms == 0 ||
|
|
dev->pending_deleted_expires_ms > qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL))) {
|
|
error_setg(errp, "Device %s is already in the "
|
|
"process of unplug", id);
|
|
return;
|
|
}
|
|
|
|
qdev_unplug(dev, errp);
|
|
}
|
|
}
|
|
|
|
void hmp_device_add(Monitor *mon, const QDict *qdict)
|
|
{
|
|
Error *err = NULL;
|
|
|
|
qmp_device_add((QDict *)qdict, NULL, &err);
|
|
hmp_handle_error(mon, err);
|
|
}
|
|
|
|
void hmp_device_del(Monitor *mon, const QDict *qdict)
|
|
{
|
|
const char *id = qdict_get_str(qdict, "id");
|
|
Error *err = NULL;
|
|
|
|
qmp_device_del(id, &err);
|
|
hmp_handle_error(mon, err);
|
|
}
|
|
|
|
BlockBackend *blk_by_qdev_id(const char *id, Error **errp)
|
|
{
|
|
DeviceState *dev;
|
|
BlockBackend *blk;
|
|
|
|
GLOBAL_STATE_CODE();
|
|
|
|
dev = find_device_state(id, errp);
|
|
if (dev == NULL) {
|
|
return NULL;
|
|
}
|
|
|
|
blk = blk_by_dev(dev);
|
|
if (!blk) {
|
|
error_setg(errp, "Device does not have a block device backend");
|
|
}
|
|
return blk;
|
|
}
|
|
|
|
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] == '=') {
|
|
opts = qemu_opts_create(&qemu_global_opts, NULL, 0, &error_abort);
|
|
qemu_opt_set(opts, "driver", driver, &error_abort);
|
|
qemu_opt_set(opts, "property", property, &error_abort);
|
|
qemu_opt_set(opts, "value", str + offset + 1, &error_abort);
|
|
return 0;
|
|
}
|
|
|
|
opts = qemu_opts_parse_noisily(&qemu_global_opts, str, false);
|
|
if (!opts) {
|
|
return -1;
|
|
}
|
|
if (!qemu_opt_get(opts, "driver")
|
|
|| !qemu_opt_get(opts, "property")
|
|
|| !qemu_opt_get(opts, "value")) {
|
|
error_report("options 'driver', 'property', and 'value'"
|
|
" are required");
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
bool qmp_command_available(const QmpCommand *cmd, Error **errp)
|
|
{
|
|
if (!phase_check(PHASE_MACHINE_READY) &&
|
|
!(cmd->options & QCO_ALLOW_PRECONFIG)) {
|
|
error_setg(errp, "The command '%s' is permitted only after machine initialization has completed",
|
|
cmd->name);
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|