diff mbox series

[v7,04/21] multi-process: setup a machine object for remote device process

Message ID e0192d9ae8c34016a834872dc037a04b4d66fdda.1593273671.git.elena.ufimtseva@oracle.com
State New
Headers show
Series Initial support for multi-process qemu | expand

Commit Message

Elena Ufimtseva June 27, 2020, 5:09 p.m. UTC 
From: Jagannathan Raman <jag.raman@oracle.com>

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>
---
 MAINTAINERS              |  2 ++
 hw/i386/Makefile.objs    |  1 +
 hw/i386/remote.c         | 64 ++++++++++++++++++++++++++++++++++++++++
 include/hw/i386/remote.h | 31 +++++++++++++++++++
 4 files changed, 98 insertions(+)
 create mode 100644 hw/i386/remote.c
 create mode 100644 include/hw/i386/remote.h

Comments

Stefan Hajnoczi June 30, 2020, 3:26 p.m. UTC | #1 
On Sat, Jun 27, 2020 at 10:09:26AM -0700, elena.ufimtseva@oracle.com wrote:
> diff --git a/hw/i386/remote.c b/hw/i386/remote.c
> new file mode 100644
> index 0000000000..4d13abe9f3
> --- /dev/null
> +++ b/hw/i386/remote.c
> @@ -0,0 +1,64 @@
> +/*
> + * Machine for remote device
> + *
> + * Copyright © 2018, 2020 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.

A suggestion for expanding the comment:

  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.

> +typedef struct RemMachineState {
> +    MachineState parent_obj;
> +
> +    RemotePCIHost *host;
> +} RemMachineState;

s/RemMachineState/RemoteMachineState/ for consistency with
"remote-machine" and RemotePCIHost.
diff mbox series

Patch

diff --git a/MAINTAINERS b/MAINTAINERS
index e46f1960bf..83aae5b441 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -2945,6 +2945,8 @@  M: John G Johnson <john.g.johnson@oracle.com>
 S: Maintained
 F: hw/pci-host/remote.c
 F: include/hw/pci-host/remote.h
+F: hw/i386/remote.c
+F: include/hw/i386/remote.h
 
 Build and test automation
 -------------------------
diff --git a/hw/i386/Makefile.objs b/hw/i386/Makefile.objs
index 6abc74551a..5ead266a15 100644
--- a/hw/i386/Makefile.objs
+++ b/hw/i386/Makefile.objs
@@ -14,6 +14,7 @@  obj-$(CONFIG_XEN) += ../xenpv/ xen/
 obj-$(CONFIG_VMPORT) += vmport.o
 obj-$(CONFIG_VMMOUSE) += vmmouse.o
 obj-$(CONFIG_PC) += port92.o
+obj-$(CONFIG_MPQEMU) += remote.o
 
 obj-y += kvmvapic.o
 obj-$(CONFIG_ACPI) += acpi-common.o
diff --git a/hw/i386/remote.c b/hw/i386/remote.c
new file mode 100644
index 0000000000..4d13abe9f3
--- /dev/null
+++ b/hw/i386/remote.c
@@ -0,0 +1,64 @@ 
+/*
+ * Machine for remote device
+ *
+ * Copyright © 2018, 2020 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/i386/remote.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;
+    RemMachineState *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_HOST_DEVICE(qdev_new(TYPE_REMOTE_HOST_DEVICE));
+
+    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-device", 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;
+}
+
+static const TypeInfo remote_machine = {
+    .name = TYPE_REMOTE_MACHINE,
+    .parent = TYPE_MACHINE,
+    .instance_size = sizeof(RemMachineState),
+    .class_init = remote_machine_class_init,
+};
+
+static void remote_machine_register_types(void)
+{
+    type_register_static(&remote_machine);
+}
+
+type_init(remote_machine_register_types);
diff --git a/include/hw/i386/remote.h b/include/hw/i386/remote.h
new file mode 100644
index 0000000000..d118a940be
--- /dev/null
+++ b/include/hw/i386/remote.h
@@ -0,0 +1,31 @@ 
+/*
+ * Remote machine configuration
+ *
+ * Copyright © 2018, 2020 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.
+ *
+ */
+
+#ifndef REMOTE_MACHINE_H
+#define REMOTE_MACHINE_H
+
+#include "qemu/osdep.h"
+#include "qemu-common.h"
+
+#include "qom/object.h"
+#include "hw/boards.h"
+#include "hw/pci-host/remote.h"
+
+typedef struct RemMachineState {
+    MachineState parent_obj;
+
+    RemotePCIHost *host;
+} RemMachineState;
+
+#define TYPE_REMOTE_MACHINE "remote-machine"
+#define REMOTE_MACHINE(obj) \
+    OBJECT_CHECK(RemMachineState, (obj), TYPE_REMOTE_MACHINE)
+
+#endif