Merge tag 'pull-request-2022-09-28' of https://gitlab.com/thuth/qemu into staging
[qemu.git] / hw / remote / machine.c
1 /*
2 * Machine for remote device
3 *
4 * This machine type is used by the remote device process in multi-process
5 * QEMU. QEMU device models depend on parent busses, interrupt controllers,
6 * memory regions, etc. The remote machine type offers this environment so
7 * that QEMU device models can be used as remote devices.
8 *
9 * Copyright © 2018, 2021 Oracle and/or its affiliates.
10 *
11 * This work is licensed under the terms of the GNU GPL, version 2 or later.
12 * See the COPYING file in the top-level directory.
13 *
14 */
15
16 #include "qemu/osdep.h"
17
18 #include "hw/remote/machine.h"
19 #include "exec/memory.h"
20 #include "qapi/error.h"
21 #include "hw/pci/pci_host.h"
22 #include "hw/remote/iohub.h"
23 #include "hw/remote/iommu.h"
24 #include "hw/qdev-core.h"
25 #include "hw/remote/iommu.h"
26 #include "hw/remote/vfio-user-obj.h"
27 #include "hw/pci/msi.h"
28
29 static void remote_machine_init(MachineState *machine)
30 {
31 MemoryRegion *system_memory, *system_io, *pci_memory;
32 RemoteMachineState *s = REMOTE_MACHINE(machine);
33 RemotePCIHost *rem_host;
34 PCIHostState *pci_host;
35
36 system_memory = get_system_memory();
37 system_io = get_system_io();
38
39 pci_memory = g_new(MemoryRegion, 1);
40 memory_region_init(pci_memory, NULL, "pci", UINT64_MAX);
41
42 rem_host = REMOTE_PCIHOST(qdev_new(TYPE_REMOTE_PCIHOST));
43
44 rem_host->mr_pci_mem = pci_memory;
45 rem_host->mr_sys_mem = system_memory;
46 rem_host->mr_sys_io = system_io;
47
48 s->host = rem_host;
49
50 object_property_add_child(OBJECT(s), "remote-pcihost", OBJECT(rem_host));
51 memory_region_add_subregion_overlap(system_memory, 0x0, pci_memory, -1);
52
53 qdev_realize(DEVICE(rem_host), sysbus_get_default(), &error_fatal);
54
55 pci_host = PCI_HOST_BRIDGE(rem_host);
56
57 if (s->vfio_user) {
58 remote_iommu_setup(pci_host->bus);
59
60 msi_nonbroken = true;
61
62 vfu_object_set_bus_irq(pci_host->bus);
63 } else {
64 remote_iohub_init(&s->iohub);
65
66 pci_bus_irqs(pci_host->bus, remote_iohub_set_irq, remote_iohub_map_irq,
67 &s->iohub, REMOTE_IOHUB_NB_PIRQS);
68 }
69
70 qbus_set_hotplug_handler(BUS(pci_host->bus), OBJECT(s));
71 }
72
73 static bool remote_machine_get_vfio_user(Object *obj, Error **errp)
74 {
75 RemoteMachineState *s = REMOTE_MACHINE(obj);
76
77 return s->vfio_user;
78 }
79
80 static void remote_machine_set_vfio_user(Object *obj, bool value, Error **errp)
81 {
82 RemoteMachineState *s = REMOTE_MACHINE(obj);
83
84 if (phase_check(PHASE_MACHINE_CREATED)) {
85 error_setg(errp, "Error enabling vfio-user - machine already created");
86 return;
87 }
88
89 s->vfio_user = value;
90 }
91
92 static bool remote_machine_get_auto_shutdown(Object *obj, Error **errp)
93 {
94 RemoteMachineState *s = REMOTE_MACHINE(obj);
95
96 return s->auto_shutdown;
97 }
98
99 static void remote_machine_set_auto_shutdown(Object *obj, bool value,
100 Error **errp)
101 {
102 RemoteMachineState *s = REMOTE_MACHINE(obj);
103
104 s->auto_shutdown = value;
105 }
106
107 static void remote_machine_instance_init(Object *obj)
108 {
109 RemoteMachineState *s = REMOTE_MACHINE(obj);
110
111 s->auto_shutdown = true;
112 }
113
114 static void remote_machine_dev_unplug_cb(HotplugHandler *hotplug_dev,
115 DeviceState *dev, Error **errp)
116 {
117 qdev_unrealize(dev);
118
119 if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_DEVICE)) {
120 remote_iommu_unplug_dev(PCI_DEVICE(dev));
121 }
122 }
123
124 static void remote_machine_class_init(ObjectClass *oc, void *data)
125 {
126 MachineClass *mc = MACHINE_CLASS(oc);
127 HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(oc);
128
129 mc->init = remote_machine_init;
130 mc->desc = "Experimental remote machine";
131
132 hc->unplug = remote_machine_dev_unplug_cb;
133
134 object_class_property_add_bool(oc, "vfio-user",
135 remote_machine_get_vfio_user,
136 remote_machine_set_vfio_user);
137
138 object_class_property_add_bool(oc, "auto-shutdown",
139 remote_machine_get_auto_shutdown,
140 remote_machine_set_auto_shutdown);
141 }
142
143 static const TypeInfo remote_machine = {
144 .name = TYPE_REMOTE_MACHINE,
145 .parent = TYPE_MACHINE,
146 .instance_size = sizeof(RemoteMachineState),
147 .instance_init = remote_machine_instance_init,
148 .class_init = remote_machine_class_init,
149 .interfaces = (InterfaceInfo[]) {
150 { TYPE_HOTPLUG_HANDLER },
151 { }
152 }
153 };
154
155 static void remote_machine_register_types(void)
156 {
157 type_register_static(&remote_machine);
158 }
159
160 type_init(remote_machine_register_types);