LXR qemu/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/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
  26static 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
  60static 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
  68static 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
  75static void remote_machine_register_types(void)
  76{
  77    type_register_static(&remote_machine);
  78}
  79
  80type_init(remote_machine_register_types);
  81