From 3f0e7e57a343ff8c041f47df108aa795fbf27fb3 Mon Sep 17 00:00:00 2001 From: Jagannathan Raman Date: Fri, 29 Jan 2021 11:46:07 -0500 Subject: multi-process: setup a machine object for remote device process x-remote-machine object sets up various subsystems of the remote device process. Instantiate PCI host bridge object and initialize RAM, IO & PCI memory regions. Signed-off-by: John G Johnson Signed-off-by: Jagannathan Raman Signed-off-by: Elena Ufimtseva Reviewed-by: Stefan Hajnoczi Message-id: c537f38d17f90453ca610c6b70cf3480274e0ba1.1611938319.git.jag.raman@oracle.com Signed-off-by: Stefan Hajnoczi --- hw/remote/machine.c | 70 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 70 insertions(+) create mode 100644 hw/remote/machine.c (limited to 'hw/remote/machine.c') diff --git a/hw/remote/machine.c b/hw/remote/machine.c new file mode 100644 index 0000000..9519a6c --- /dev/null +++ b/hw/remote/machine.c @@ -0,0 +1,70 @@ +/* + * Machine for remote device + * + * This machine type is used by the remote device process in multi-process + * QEMU. QEMU device models depend on parent busses, interrupt controllers, + * memory regions, etc. The remote machine type offers this environment so + * that QEMU device models can be used as remote devices. + * + * Copyright © 2018, 2021 Oracle and/or its affiliates. + * + * This work is licensed under the terms of the GNU GPL, version 2 or later. + * See the COPYING file in the top-level directory. + * + */ + +#include "qemu/osdep.h" +#include "qemu-common.h" + +#include "hw/remote/machine.h" +#include "exec/address-spaces.h" +#include "exec/memory.h" +#include "qapi/error.h" + +static void remote_machine_init(MachineState *machine) +{ + MemoryRegion *system_memory, *system_io, *pci_memory; + RemoteMachineState *s = REMOTE_MACHINE(machine); + RemotePCIHost *rem_host; + + system_memory = get_system_memory(); + system_io = get_system_io(); + + pci_memory = g_new(MemoryRegion, 1); + memory_region_init(pci_memory, NULL, "pci", UINT64_MAX); + + rem_host = REMOTE_PCIHOST(qdev_new(TYPE_REMOTE_PCIHOST)); + + rem_host->mr_pci_mem = pci_memory; + rem_host->mr_sys_mem = system_memory; + rem_host->mr_sys_io = system_io; + + s->host = rem_host; + + object_property_add_child(OBJECT(s), "remote-pcihost", OBJECT(rem_host)); + memory_region_add_subregion_overlap(system_memory, 0x0, pci_memory, -1); + + qdev_realize(DEVICE(rem_host), sysbus_get_default(), &error_fatal); +} + +static void remote_machine_class_init(ObjectClass *oc, void *data) +{ + MachineClass *mc = MACHINE_CLASS(oc); + + mc->init = remote_machine_init; + mc->desc = "Experimental remote machine"; +} + +static const TypeInfo remote_machine = { + .name = TYPE_REMOTE_MACHINE, + .parent = TYPE_MACHINE, + .instance_size = sizeof(RemoteMachineState), + .class_init = remote_machine_class_init, +}; + +static void remote_machine_register_types(void) +{ + type_register_static(&remote_machine); +} + +type_init(remote_machine_register_types); -- cgit v1.1