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