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
  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);