[PATCH v5 10/50] multi-process: setup a machine object for remote device process

[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>
---
 v4 -> v5:
  - Refactor notifier code into a common file
  - Moved global initialization out of object specific code
  - Added a child property relationship between RemMachineState & RemPCIHost

 Makefile.objs                 |  1 +
 exec.c                        |  3 +-
 include/exec/address-spaces.h |  2 ++
 include/remote/machine.h      | 30 ++++++++++++++++
 remote/Makefile.objs          |  1 +
 remote/machine.c              | 84 +++++++++++++++++++++++++++++++++++++++++++
 remote/remote-main.c          |  7 ++++
 util/Makefile.objs            |  2 ++
 8 files changed, 128 insertions(+), 2 deletions(-)
 create mode 100644 include/remote/machine.h
 create mode 100644 remote/machine.c

diff --git a/Makefile.objs b/Makefile.objs
index c80e107..aad33fc 100644
--- a/Makefile.objs
+++ b/Makefile.objs
@@ -31,6 +31,7 @@ remote-pci-obj-$(CONFIG_MPQEMU) += block/
 remote-pci-obj-$(CONFIG_MPQEMU) += migration/
 remote-pci-obj-$(CONFIG_MPQEMU) += remote/
 remote-pci-obj-$(CONFIG_MPQEMU) += accel/
+remote-pci-obj-$(CONFIG_MPQEMU) += util/
 
 remote-pci-obj-$(CONFIG_MPQEMU) += cpus-common.o
 remote-pci-obj-$(CONFIG_MPQEMU) += dma-helpers.o
diff --git a/exec.c b/exec.c
index e524185..b4c9cc6 100644
--- a/exec.c
+++ b/exec.c
@@ -161,7 +161,6 @@ typedef struct subpage_t {
 #define PHYS_SECTION_UNASSIGNED 0
 
 static void io_mem_init(void);
-static void memory_map_init(void);
 static void tcg_log_global_after_sync(MemoryListener *listener);
 static void tcg_commit(MemoryListener *listener);
 
@@ -3002,7 +3001,7 @@ static void tcg_commit(MemoryListener *listener)
     tlb_flush(cpuas->cpu);
 }
 
-static void memory_map_init(void)
+void memory_map_init(void)
 {
     system_memory = g_malloc(sizeof(*system_memory));
 
diff --git a/include/exec/address-spaces.h b/include/exec/address-spaces.h
index db8bfa9..56a877b 100644
--- a/include/exec/address-spaces.h
+++ b/include/exec/address-spaces.h
@@ -33,6 +33,8 @@ MemoryRegion *get_system_memory(void);
  */
 MemoryRegion *get_system_io(void);
 
+void memory_map_init(void);
+
 extern AddressSpace address_space_memory;
 extern AddressSpace address_space_io;
 
diff --git a/include/remote/machine.h b/include/remote/machine.h
new file mode 100644
index 0000000..7e9bdbe
--- /dev/null
+++ b/include/remote/machine.h
@@ -0,0 +1,30 @@
+/*
+ * 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 "qom/object.h"
+#include "hw/boards.h"
+#include "remote/pcihost.h"
+#include "qemu/notify.h"
+
+typedef struct RemMachineState {
+    MachineState parent_obj;
+
+    RemPCIHost *host;
+} RemMachineState;
+
+#define TYPE_REMOTE_MACHINE "remote-machine"
+#define REMOTE_MACHINE(obj) \
+    OBJECT_CHECK(RemMachineState, (obj), TYPE_REMOTE_MACHINE)
+
+#endif
diff --git a/remote/Makefile.objs b/remote/Makefile.objs
index 2757f5a..13d4c48 100644
--- a/remote/Makefile.objs
+++ b/remote/Makefile.objs
@@ -1,2 +1,3 @@
 remote-pci-obj-$(CONFIG_MPQEMU) += remote-main.o
 remote-pci-obj-$(CONFIG_MPQEMU) += pcihost.o
+remote-pci-obj-$(CONFIG_MPQEMU) += machine.o
diff --git a/remote/machine.c b/remote/machine.c
new file mode 100644
index 0000000..97e4f19
--- /dev/null
+++ b/remote/machine.c
@@ -0,0 +1,84 @@
+/*
+ * 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 <stdint.h>
+#include <sys/types.h>
+
+#include "qemu/osdep.h"
+#include "remote/pcihost.h"
+#include "remote/machine.h"
+#include "exec/address-spaces.h"
+#include "exec/memory.h"
+#include "exec/ioport.h"
+#include "qemu/thread.h"
+#include "qom/object.h"
+#include "qemu/module.h"
+#include "qapi/error.h"
+#include "qemu/main-loop.h"
+#include "qemu-common.h"
+#include "sysemu/sysemu.h"
+#include "qemu/notify.h"
+
+static void remote_machine_init(Object *obj)
+{
+    RemMachineState *s = REMOTE_MACHINE(obj);
+    RemPCIHost *rem_host;
+    MemoryRegion *system_memory, *system_io, *pci_memory;
+
+    Error *error_abort = NULL;
+
+    object_property_add_child(object_get_root(), "machine", obj, &error_abort);
+    if (error_abort) {
+        error_report_err(error_abort);
+    }
+
+    memory_map_init();
+
+    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_create(NULL, 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),
+                              &error_abort);
+    if (error_abort) {
+        error_report_err(error_abort);
+        return;
+    }
+
+    qemu_mutex_lock_iothread();
+    memory_region_add_subregion_overlap(system_memory, 0x0, pci_memory, -1);
+    qemu_mutex_unlock_iothread();
+
+    qdev_init_nofail(DEVICE(rem_host));
+}
+
+static const TypeInfo remote_machine = {
+    .name = TYPE_REMOTE_MACHINE,
+    .parent = TYPE_MACHINE,
+    .instance_size = sizeof(RemMachineState),
+    .instance_init = remote_machine_init,
+};
+
+static void remote_machine_register_types(void)
+{
+    type_register_static(&remote_machine);
+}
+
+type_init(remote_machine_register_types);
diff --git a/remote/remote-main.c b/remote/remote-main.c
index 7c0764a..ecf30e0 100644
--- a/remote/remote-main.c
+++ b/remote/remote-main.c
@@ -14,10 +14,17 @@
 #include <stdio.h>
 
 #include "qemu/module.h"
+#include "remote/pcihost.h"
+#include "remote/machine.h"
+#include "hw/boards.h"
+#include "hw/qdev-core.h"
+#include "qemu/main-loop.h"
 
 int main(int argc, char *argv[])
 {
     module_call_init(MODULE_INIT_QOM);
 
+    current_machine = MACHINE(REMOTE_MACHINE(object_new(TYPE_REMOTE_MACHINE)));
+
     return 0;
 }
diff --git a/util/Makefile.objs b/util/Makefile.objs
index 6b38b67..80b2067 100644
--- a/util/Makefile.objs
+++ b/util/Makefile.objs
@@ -60,3 +60,5 @@ util-obj-y += guest-random.o
 util-obj-$(CONFIG_GIO) += dbus.o
 dbus.o-cflags = $(GIO_CFLAGS)
 dbus.o-libs = $(GIO_LIBS)
+
+remote-pci-obj-$(CONFIG_MPQEMU) += notify.o
-- 
1.8.3.1