mirror of
https://github.com/xemu-project/xemu.git
synced 2024-11-23 19:49:43 +00:00
0f9668e0c1
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Message-Id: <20220323155743.1585078-33-marcandre.lureau@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
75 lines
2.2 KiB
C
75 lines
2.2 KiB
C
/*
|
|
* Remote PCI host device
|
|
*
|
|
* Unlike PCI host devices that model physical hardware, the purpose
|
|
* of this PCI host is to host multi-process QEMU devices.
|
|
*
|
|
* Multi-process QEMU extends the PCI host of a QEMU machine into a
|
|
* remote process. Any PCI device attached to the remote process is
|
|
* visible in the QEMU guest. This allows existing QEMU device models
|
|
* to be reused in the remote process.
|
|
*
|
|
* This PCI host is purely a container for PCI devices. It's fake in the
|
|
* sense that the guest never sees this PCI host and has no way of
|
|
* accessing it. Its job is just to provide the environment that QEMU
|
|
* PCI device models need when running in a remote process.
|
|
*
|
|
* 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 "hw/pci/pci.h"
|
|
#include "hw/pci/pci_host.h"
|
|
#include "hw/pci/pcie_host.h"
|
|
#include "hw/qdev-properties.h"
|
|
#include "hw/pci-host/remote.h"
|
|
#include "exec/memory.h"
|
|
|
|
static const char *remote_pcihost_root_bus_path(PCIHostState *host_bridge,
|
|
PCIBus *rootbus)
|
|
{
|
|
return "0000:00";
|
|
}
|
|
|
|
static void remote_pcihost_realize(DeviceState *dev, Error **errp)
|
|
{
|
|
PCIHostState *pci = PCI_HOST_BRIDGE(dev);
|
|
RemotePCIHost *s = REMOTE_PCIHOST(dev);
|
|
|
|
pci->bus = pci_root_bus_new(DEVICE(s), "remote-pci",
|
|
s->mr_pci_mem, s->mr_sys_io,
|
|
0, TYPE_PCIE_BUS);
|
|
}
|
|
|
|
static void remote_pcihost_class_init(ObjectClass *klass, void *data)
|
|
{
|
|
DeviceClass *dc = DEVICE_CLASS(klass);
|
|
PCIHostBridgeClass *hc = PCI_HOST_BRIDGE_CLASS(klass);
|
|
|
|
hc->root_bus_path = remote_pcihost_root_bus_path;
|
|
dc->realize = remote_pcihost_realize;
|
|
|
|
dc->user_creatable = false;
|
|
set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
|
|
dc->fw_name = "pci";
|
|
}
|
|
|
|
static const TypeInfo remote_pcihost_info = {
|
|
.name = TYPE_REMOTE_PCIHOST,
|
|
.parent = TYPE_PCIE_HOST_BRIDGE,
|
|
.instance_size = sizeof(RemotePCIHost),
|
|
.class_init = remote_pcihost_class_init,
|
|
};
|
|
|
|
static void remote_pcihost_register(void)
|
|
{
|
|
type_register_static(&remote_pcihost_info);
|
|
}
|
|
|
|
type_init(remote_pcihost_register)
|