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/*
* Machine for remote device
*
* This machine type is used by the remote device process in multi-process
* QEMU. QEMU device models depend on parent busses, interrupt controllers,
* memory regions, etc. The remote machine type offers this environment so
* that QEMU device models can be used as remote devices.
*
* Copyright © 2018, 2021 Oracle and/or its affiliates.
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*
*/
#include "qemu/osdep.h"
#include "hw/remote/machine.h"
#include "exec/memory.h"
#include "qapi/error.h"
#include "hw/pci/pci_host.h"
#include "hw/remote/iohub.h"
#include "hw/remote/iommu.h"
#include "hw/qdev-core.h"
#include "hw/remote/vfio-user-obj.h"
#include "hw/pci/msi.h"
static void remote_machine_init(MachineState *machine)
{
MemoryRegion *system_memory, *system_io, *pci_memory;
RemoteMachineState *s = REMOTE_MACHINE(machine);
RemotePCIHost *rem_host;
PCIHostState *pci_host;
system_memory = get_system_memory();
system_io = get_system_io();
pci_memory = g_new(MemoryRegion, 1);
memory_region_init(pci_memory, NULL, "pci", UINT64_MAX);
rem_host = REMOTE_PCIHOST(qdev_new(TYPE_REMOTE_PCIHOST));
rem_host->mr_pci_mem = pci_memory;
rem_host->mr_sys_mem = system_memory;
rem_host->mr_sys_io = system_io;
s->host = rem_host;
object_property_add_child(OBJECT(s), "remote-pcihost", OBJECT(rem_host));
memory_region_add_subregion_overlap(system_memory, 0x0, pci_memory, -1);
qdev_realize(DEVICE(rem_host), sysbus_get_default(), &error_fatal);
pci_host = PCI_HOST_BRIDGE(rem_host);
if (s->vfio_user) {
remote_iommu_setup(pci_host->bus);
msi_nonbroken = true;
vfu_object_set_bus_irq(pci_host->bus);
} else {
remote_iohub_init(&s->iohub);
pci_bus_irqs(pci_host->bus, remote_iohub_set_irq,
&s->iohub, REMOTE_IOHUB_NB_PIRQS);
pci_bus_map_irqs(pci_host->bus, remote_iohub_map_irq);
}
qbus_set_hotplug_handler(BUS(pci_host->bus), OBJECT(s));
}
static bool remote_machine_get_vfio_user(Object *obj, Error **errp)
{
RemoteMachineState *s = REMOTE_MACHINE(obj);
return s->vfio_user;
}
static void remote_machine_set_vfio_user(Object *obj, bool value, Error **errp)
{
RemoteMachineState *s = REMOTE_MACHINE(obj);
if (phase_check(PHASE_MACHINE_CREATED)) {
error_setg(errp, "Error enabling vfio-user - machine already created");
return;
}
s->vfio_user = value;
}
static bool remote_machine_get_auto_shutdown(Object *obj, Error **errp)
{
RemoteMachineState *s = REMOTE_MACHINE(obj);
return s->auto_shutdown;
}
static void remote_machine_set_auto_shutdown(Object *obj, bool value,
Error **errp)
{
RemoteMachineState *s = REMOTE_MACHINE(obj);
s->auto_shutdown = value;
}
static void remote_machine_instance_init(Object *obj)
{
RemoteMachineState *s = REMOTE_MACHINE(obj);
s->auto_shutdown = true;
}
static void remote_machine_dev_unplug_cb(HotplugHandler *hotplug_dev,
DeviceState *dev, Error **errp)
{
qdev_unrealize(dev);
if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_DEVICE)) {
remote_iommu_unplug_dev(PCI_DEVICE(dev));
}
}
static void remote_machine_class_init(ObjectClass *oc, void *data)
{
MachineClass *mc = MACHINE_CLASS(oc);
HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(oc);
mc->init = remote_machine_init;
mc->desc = "Experimental remote machine";
hc->unplug = remote_machine_dev_unplug_cb;
object_class_property_add_bool(oc, "vfio-user",
remote_machine_get_vfio_user,
remote_machine_set_vfio_user);
object_class_property_add_bool(oc, "auto-shutdown",
remote_machine_get_auto_shutdown,
remote_machine_set_auto_shutdown);
}
static const TypeInfo remote_machine = {
.name = TYPE_REMOTE_MACHINE,
.parent = TYPE_MACHINE,
.instance_size = sizeof(RemoteMachineState),
.instance_init = remote_machine_instance_init,
.class_init = remote_machine_class_init,
.interfaces = (InterfaceInfo[]) {
{ TYPE_HOTPLUG_HANDLER },
{ }
}
};
static void remote_machine_register_types(void)
{
type_register_static(&remote_machine);
}
type_init(remote_machine_register_types);
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