mirrors/qemu
0
0
Fork 0
mirror of https://github.com/qemu/qemu.git synced 2024-11-25 11:53:39 +08:00
Code Issues Packages Projects Releases Wiki Activity
dc9acc9ce4
qemu/softmmu/qdev-monitor.c
Jagannathan Raman 217c7f01ad qdev: unplug blocker for devices 
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>
2022-06-15 14:50:41 +01:00

1067 lines
31 KiB
C
Raw Blame History

/*
* 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 2.1 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 "qemu/osdep.h"
#include "hw/sysbus.h"
#include "monitor/hmp.h"
#include "monitor/monitor.h"
#include "monitor/qdev.h"
#include "sysemu/arch_init.h"
#include "qapi/error.h"
#include "qapi/qapi-commands-qdev.h"
#include "qapi/qmp/dispatch.h"
#include "qapi/qmp/qdict.h"
#include "qapi/qmp/qerror.h"
#include "qapi/qmp/qstring.h"
#include "qapi/qobject-input-visitor.h"
#include "qemu/config-file.h"
#include "qemu/error-report.h"
#include "qemu/help_option.h"
#include "qemu/option.h"
#include "qemu/qemu-print.h"
#include "qemu/option_int.h"
#include "sysemu/block-backend.h"
#include "migration/misc.h"
#include "migration/migration.h"
#include "qemu/cutils.h"
#include "hw/qdev-properties.h"
#include "hw/clock.h"
#include "hw/boards.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;
/* default virtio transport per architecture */
#define QEMU_ARCH_VIRTIO_PCI (QEMU_ARCH_ALPHA | QEMU_ARCH_ARM | \
QEMU_ARCH_HPPA | QEMU_ARCH_I386 | \
QEMU_ARCH_MIPS | QEMU_ARCH_PPC | \
QEMU_ARCH_RISCV | QEMU_ARCH_SH4 | \
QEMU_ARCH_SPARC | QEMU_ARCH_XTENSA | \
QEMU_ARCH_LOONGARCH)
#define QEMU_ARCH_VIRTIO_CCW (QEMU_ARCH_S390X)
#define QEMU_ARCH_VIRTIO_MMIO (QEMU_ARCH_M68K)
/* Please keep this table sorted by typename. */
static const QDevAlias qdev_alias_table[] = {
{ "AC97", "ac97" }, /* -soundhw name */
{ "e1000", "e1000-82540em" },
{ "ES1370", "es1370" }, /* -soundhw name */
{ "ich9-ahci", "ahci" },
{ "lsi53c895a", "lsi" },
{ "virtio-9p-device", "virtio-9p", QEMU_ARCH_VIRTIO_MMIO },
{ "virtio-9p-ccw", "virtio-9p", QEMU_ARCH_VIRTIO_CCW },
{ "virtio-9p-pci", "virtio-9p", QEMU_ARCH_VIRTIO_PCI },
{ "virtio-balloon-device", "virtio-balloon", QEMU_ARCH_VIRTIO_MMIO },
{ "virtio-balloon-ccw", "virtio-balloon", QEMU_ARCH_VIRTIO_CCW },
{ "virtio-balloon-pci", "virtio-balloon", QEMU_ARCH_VIRTIO_PCI },
{ "virtio-blk-device", "virtio-blk", QEMU_ARCH_VIRTIO_MMIO },
{ "virtio-blk-ccw", "virtio-blk", QEMU_ARCH_VIRTIO_CCW },
{ "virtio-blk-pci", "virtio-blk", QEMU_ARCH_VIRTIO_PCI },
{ "virtio-gpu-device", "virtio-gpu", QEMU_ARCH_VIRTIO_MMIO },
{ "virtio-gpu-ccw", "virtio-gpu", QEMU_ARCH_VIRTIO_CCW },
{ "virtio-gpu-pci", "virtio-gpu", QEMU_ARCH_VIRTIO_PCI },
{ "virtio-gpu-gl-device", "virtio-gpu-gl", QEMU_ARCH_VIRTIO_MMIO },
{ "virtio-gpu-gl-pci", "virtio-gpu-gl", QEMU_ARCH_VIRTIO_PCI },
{ "virtio-input-host-device", "virtio-input-host", QEMU_ARCH_VIRTIO_MMIO },
{ "virtio-input-host-ccw", "virtio-input-host", QEMU_ARCH_VIRTIO_CCW },
{ "virtio-input-host-pci", "virtio-input-host", QEMU_ARCH_VIRTIO_PCI },
{ "virtio-iommu-pci", "virtio-iommu", QEMU_ARCH_VIRTIO_PCI },
{ "virtio-keyboard-device", "virtio-keyboard", QEMU_ARCH_VIRTIO_MMIO },
{ "virtio-keyboard-ccw", "virtio-keyboard", QEMU_ARCH_VIRTIO_CCW },
{ "virtio-keyboard-pci", "virtio-keyboard", QEMU_ARCH_VIRTIO_PCI },
{ "virtio-mouse-device", "virtio-mouse", QEMU_ARCH_VIRTIO_MMIO },
{ "virtio-mouse-ccw", "virtio-mouse", QEMU_ARCH_VIRTIO_CCW },
{ "virtio-mouse-pci", "virtio-mouse", QEMU_ARCH_VIRTIO_PCI },
{ "virtio-net-device", "virtio-net", QEMU_ARCH_VIRTIO_MMIO },
{ "virtio-net-ccw", "virtio-net", QEMU_ARCH_VIRTIO_CCW },
{ "virtio-net-pci", "virtio-net", QEMU_ARCH_VIRTIO_PCI },
{ "virtio-rng-device", "virtio-rng", QEMU_ARCH_VIRTIO_MMIO },
{ "virtio-rng-ccw", "virtio-rng", QEMU_ARCH_VIRTIO_CCW },
{ "virtio-rng-pci", "virtio-rng", QEMU_ARCH_VIRTIO_PCI },
{ "virtio-scsi-device", "virtio-scsi", QEMU_ARCH_VIRTIO_MMIO },
{ "virtio-scsi-ccw", "virtio-scsi", QEMU_ARCH_VIRTIO_CCW },
{ "virtio-scsi-pci", "virtio-scsi", QEMU_ARCH_VIRTIO_PCI },
{ "virtio-serial-device", "virtio-serial", QEMU_ARCH_VIRTIO_MMIO },
{ "virtio-serial-ccw", "virtio-serial", QEMU_ARCH_VIRTIO_CCW },
{ "virtio-serial-pci", "virtio-serial", QEMU_ARCH_VIRTIO_PCI},
{ "virtio-tablet-device", "virtio-tablet", QEMU_ARCH_VIRTIO_MMIO },
{ "virtio-tablet-ccw", "virtio-tablet", QEMU_ARCH_VIRTIO_CCW },
{ "virtio-tablet-pci", "virtio-tablet", QEMU_ARCH_VIRTIO_PCI },
{ }
};
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(DeviceClass *dc)
{
qemu_printf("name \"%s\"", object_class_get_name(OBJECT_CLASS(dc)));
if (dc->bus_type) {
qemu_printf(", bus %s", dc->bus_type);
}
if (qdev_class_has_alias(dc)) {
qemu_printf(", alias \"%s\"", qdev_class_get_alias(dc));
}
if (dc->desc) {
qemu_printf(", desc \"%s\"", dc->desc);
}
if (!dc->user_creatable) {
qemu_printf(", no-user");
}
qemu_printf("\n");
}
static void qdev_print_devinfos(bool show_no_user)
{
static const char *cat_name[DEVICE_CATEGORY_MAX + 1] = {
[DEVICE_CATEGORY_BRIDGE] = "Controller/Bridge/Hub",
[DEVICE_CATEGORY_USB] = "USB",
[DEVICE_CATEGORY_STORAGE] = "Storage",
[DEVICE_CATEGORY_NETWORK] = "Network",
[DEVICE_CATEGORY_INPUT] = "Input",
[DEVICE_CATEGORY_DISPLAY] = "Display",
[DEVICE_CATEGORY_SOUND] = "Sound",
[DEVICE_CATEGORY_MISC] = "Misc",
[DEVICE_CATEGORY_CPU] = "CPU",
[DEVICE_CATEGORY_WATCHDOG]= "Watchdog",
[DEVICE_CATEGORY_MAX] = "Uncategorized",
};
GSList *list, *elt;
int i;
bool cat_printed;
module_load_qom_all();
list = object_class_get_list_sorted(TYPE_DEVICE, false);
for (i = 0; i <= DEVICE_CATEGORY_MAX; i++) {
cat_printed = false;
for (elt = list; elt; elt = elt->next) {
DeviceClass *dc = OBJECT_CLASS_CHECK(DeviceClass, elt->data,
TYPE_DEVICE);
if ((i < DEVICE_CATEGORY_MAX
? !test_bit(i, dc->categories)
: !bitmap_empty(dc->categories, DEVICE_CATEGORY_MAX))
|| (!show_no_user
&& !dc->user_creatable)) {
continue;
}
if (!cat_printed) {
qemu_printf("%s%s devices:\n", i ? "\n" : "", cat_name[i]);
cat_printed = true;
}
qdev_print_devinfo(dc);
}
}
g_slist_free(list);
}
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;
}
static DeviceClass *qdev_get_device_class(const char **driver, Error **errp)
{
ObjectClass *oc;
DeviceClass *dc;
const char *original_name = *driver;
oc = module_object_class_by_name(*driver);
if (!oc) {
const char *typename = find_typename_by_alias(*driver);
if (typename) {
*driver = typename;
oc = module_object_class_by_name(*driver);
}
}
if (!object_class_dynamic_cast(oc, TYPE_DEVICE)) {
if (*driver != original_name) {
error_setg(errp, "'%s' (alias '%s') is not a valid device model"
" name", original_name, *driver);
} else {
error_setg(errp, "'%s' is not a valid device model name", *driver);
}
return NULL;
}
if (object_class_is_abstract(oc)) {
error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "driver",
"a non-abstract device type");
return NULL;
}
dc = DEVICE_CLASS(oc);
if (!dc->user_creatable ||
(phase_check(PHASE_MACHINE_READY) && !dc->hotpluggable)) {
error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "driver",
"a pluggable device type");
return NULL;
}
if (object_class_dynamic_cast(oc, TYPE_SYS_BUS_DEVICE)) {
/* sysbus devices need to be allowed by the machine */
MachineClass *mc = MACHINE_CLASS(object_get_class(qdev_get_machine()));
if (!device_type_is_dynamic_sysbus(mc, *driver)) {
error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "driver",
"a dynamic sysbus device type for the machine");
return NULL;
}
}
return dc;
}
int qdev_device_help(QemuOpts *opts)
{
Error *local_err = NULL;
const char *driver;
ObjectPropertyInfoList *prop_list;
ObjectPropertyInfoList *prop;
GPtrArray *array;
int i;
driver = qemu_opt_get(opts, "driver");
if (driver && is_help_option(driver)) {
qdev_print_devinfos(false);
return 1;
}
if (!driver || !qemu_opt_has_help_opt(opts)) {
return 0;
}
if (!object_class_by_name(driver)) {
const char *typename = find_typename_by_alias(driver);
if (typename) {
driver = typename;
}
}
prop_list = qmp_device_list_properties(driver, &local_err);
if (local_err) {
goto error;
}
if (prop_list) {
qemu_printf("%s options:\n", driver);
} else {
qemu_printf("There are no options for %s.\n", driver);
}
array = g_ptr_array_new();
for (prop = prop_list; prop; prop = prop->next) {
g_ptr_array_add(array,
object_property_help(prop->value->name,
prop->value->type,
prop->value->default_value,
prop->value->description));
}
g_ptr_array_sort(array, (GCompareFunc)qemu_pstrcmp0);
for (i = 0; i < array->len; i++) {
qemu_printf("%s\n", (char *)array->pdata[i]);
}
g_ptr_array_set_free_func(array, g_free);
g_ptr_array_free(array, true);
qapi_free_ObjectPropertyInfoList(prop_list);
return 1;
error:
error_report_err(local_err);
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_error_append_bus_list_hint(DeviceState *dev,
Error *const *errp)
{
BusState *child;
const char *sep = " ";
error_append_hint(errp, "child buses at \"%s\":",
dev->id ? dev->id : object_get_typename(OBJECT(dev)));
QLIST_FOREACH(child, &dev->child_bus, sibling) {
error_append_hint(errp, "%s\"%s\"", sep, child->name);
sep = ", ";
}
error_append_hint(errp, "\n");
}
static void qbus_error_append_dev_list_hint(BusState *bus,
Error *const *errp)
{
BusChild *kid;
const char *sep = " ";
error_append_hint(errp, "devices at \"%s\":", bus->name);
QTAILQ_FOREACH(kid, &bus->children, sibling) {
DeviceState *dev = kid->child;
error_append_hint(errp, "%s\"%s\"", sep,
object_get_typename(OBJECT(dev)));
if (dev->id) {
error_append_hint(errp, "/\"%s\"", dev->id);
}
sep = ", ";
}
error_append_hint(errp, "\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 inline bool qbus_is_full(BusState *bus)
{
BusClass *bus_class;
if (bus->full) {
return true;
}
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;
}
Reference in New Issue View Git Blame Copy Permalink