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 #include "qemu-common.h" 18 19 #include "hw/remote/machine.h" 20 #include "exec/address-spaces.h" 21 #include "exec/memory.h" 22 #include "qapi/error.h" 23 #include "hw/pci/pci_host.h" 24 #include "hw/remote/iohub.h" 25 26 static void remote_machine_init(MachineState *machine) 27 { 28 MemoryRegion *system_memory, *system_io, *pci_memory; 29 RemoteMachineState *s = REMOTE_MACHINE(machine); 30 RemotePCIHost *rem_host; 31 PCIHostState *pci_host; 32 33 system_memory = get_system_memory(); 34 system_io = get_system_io(); 35 36 pci_memory = g_new(MemoryRegion, 1); 37 memory_region_init(pci_memory, NULL, "pci", UINT64_MAX); 38 39 rem_host = REMOTE_PCIHOST(qdev_new(TYPE_REMOTE_PCIHOST)); 40 41 rem_host->mr_pci_mem = pci_memory; 42 rem_host->mr_sys_mem = system_memory; 43 rem_host->mr_sys_io = system_io; 44 45 s->host = rem_host; 46 47 object_property_add_child(OBJECT(s), "remote-pcihost", OBJECT(rem_host)); 48 memory_region_add_subregion_overlap(system_memory, 0x0, pci_memory, -1); 49 50 qdev_realize(DEVICE(rem_host), sysbus_get_default(), &error_fatal); 51 52 pci_host = PCI_HOST_BRIDGE(rem_host); 53 54 remote_iohub_init(&s->iohub); 55 56 pci_bus_irqs(pci_host->bus, remote_iohub_set_irq, remote_iohub_map_irq, 57 &s->iohub, REMOTE_IOHUB_NB_PIRQS); 58 } 59 60 static void remote_machine_class_init(ObjectClass *oc, void *data) 61 { 62 MachineClass *mc = MACHINE_CLASS(oc); 63 64 mc->init = remote_machine_init; 65 mc->desc = "Experimental remote machine"; 66 } 67 68 static const TypeInfo remote_machine = { 69 .name = TYPE_REMOTE_MACHINE, 70 .parent = TYPE_MACHINE, 71 .instance_size = sizeof(RemoteMachineState), 72 .class_init = remote_machine_class_init, 73 }; 74 75 static void remote_machine_register_types(void) 76 { 77 type_register_static(&remote_machine); 78 } 79 80 type_init(remote_machine_register_types); 81