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multi-process: setup a machine object for remote device process

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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 <john.g.johnson@oracle.com>
Signed-off-by: Jagannathan Raman <jag.raman@oracle.com>
Signed-off-by: Elena Ufimtseva <elena.ufimtseva@oracle.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-id: c537f38d17f90453ca610c6b70cf3480274e0ba1.1611938319.git.jag.raman@oracle.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Jagannathan Raman 2021-01-29 11:46:07 -05:00 • committed by Stefan Hajnoczi
parent 6fbd84d632
commit 3f0e7e57a3
6 changed files with 106 additions and 0 deletions
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70
hw/remote/machine.c Normal file
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/*
* 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);