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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/vfio-user-obj.h" | |
26 | #include "hw/pci/msi.h" | |
27 | ||
28 | static void remote_machine_init(MachineState *machine) | |
29 | { | |
30 | MemoryRegion *system_memory, *system_io, *pci_memory; | |
31 | RemoteMachineState *s = REMOTE_MACHINE(machine); | |
32 | RemotePCIHost *rem_host; | |
33 | PCIHostState *pci_host; | |
34 | ||
35 | system_memory = get_system_memory(); | |
36 | system_io = get_system_io(); | |
37 | ||
38 | pci_memory = g_new(MemoryRegion, 1); | |
39 | memory_region_init(pci_memory, NULL, "pci", UINT64_MAX); | |
40 | ||
41 | rem_host = REMOTE_PCIHOST(qdev_new(TYPE_REMOTE_PCIHOST)); | |
42 | ||
43 | rem_host->mr_pci_mem = pci_memory; | |
44 | rem_host->mr_sys_mem = system_memory; | |
45 | rem_host->mr_sys_io = system_io; | |
46 | ||
47 | s->host = rem_host; | |
48 | ||
49 | object_property_add_child(OBJECT(s), "remote-pcihost", OBJECT(rem_host)); | |
50 | memory_region_add_subregion_overlap(system_memory, 0x0, pci_memory, -1); | |
51 | ||
52 | qdev_realize(DEVICE(rem_host), sysbus_get_default(), &error_fatal); | |
53 | ||
54 | pci_host = PCI_HOST_BRIDGE(rem_host); | |
55 | ||
56 | if (s->vfio_user) { | |
57 | remote_iommu_setup(pci_host->bus); | |
58 | ||
59 | msi_nonbroken = true; | |
60 | ||
61 | vfu_object_set_bus_irq(pci_host->bus); | |
62 | } else { | |
63 | remote_iohub_init(&s->iohub); | |
64 | ||
65 | pci_bus_irqs(pci_host->bus, remote_iohub_set_irq, | |
66 | &s->iohub, REMOTE_IOHUB_NB_PIRQS); | |
67 | pci_bus_map_irqs(pci_host->bus, remote_iohub_map_irq); | |
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); |