[Qemu-devel] [PATCH v2 3/4] vl.c: Enable adding devices to the system bus

[Alistair Francis]

This removes the old method to connect devices and replaces it
with three calls to the three qdev-monitor functions added
in the previous patch.

This allows complete machines to be built via the command line as
well as just attaching simple sysbus devices.

Signed-off-by: Alistair Francis <alistair.fran...@xilinx.com>
---

 vl.c |   74 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-----
 1 files changed, 68 insertions(+), 6 deletions(-)

diff --git a/vl.c b/vl.c
index 9975e5a..809882c 100644
--- a/vl.c
+++ b/vl.c
@@ -97,6 +97,7 @@ int main(int argc, char **argv)
 #include "qemu-options.h"
 #include "qmp-commands.h"
 #include "qemu/main-loop.h"
+#include "qemu/option_int.h"
 #ifdef CONFIG_VIRTFS
 #include "fsdev/qemu-fsdev.h"
 #endif
@@ -2381,14 +2382,63 @@ static int device_help_func(QemuOpts *opts, void 
*opaque)
     return qdev_device_help(opts);
 }
 
+static int device_add_func(QemuOpts *opts, void *opaque)
+{
+    DeviceState *dev;
+
+    if (strcmp(qemu_opt_get(opts, "driver"), "memory") &&
+        strcmp(qemu_opt_get(opts, "driver"), "cpu") &&
+        opts->opaque == NULL) {
+        dev = qdev_device_add(opts);
+        if (!dev) {
+            return -1;
+        }
+        object_unref(OBJECT(dev));
+    }
+    return 0;
+}
+
+static int device_create_func(QemuOpts *opts, void *opaque)
+{
+    DeviceState *dev;
+
+    dev = qdev_device_create(opts);
+
+    return 0;
+}
+
 static int device_init_func(QemuOpts *opts, void *opaque)
 {
     DeviceState *dev;
+    QEMUMachineInitArgs *current_machine = (QEMUMachineInitArgs *) opaque;
+    DeviceState *intc = current_machine->intc;
 
-    dev = qdev_device_add(opts);
-    if (!dev)
-        return -1;
-    object_unref(OBJECT(dev));
+    dev = qdev_device_init(opts, intc);
+
+    if (dev && (dev->num_gpio_in > 32)) {
+        /* Store the Interupt Controller */
+        current_machine->intc = dev;
+    }
+
+    return 0;
+}
+
+static int device_connect_func(QemuOpts *opts, void *opaque)
+{
+    DeviceState *dev;
+    QEMUMachineInitArgs *current_machine = (QEMUMachineInitArgs *) opaque;
+    DeviceState *intc = current_machine->intc;
+
+    dev = qdev_device_connect(opts, intc);
+
+    if (dev && (dev->num_gpio_in > 0)) {
+        /* Store the Interupt Controller */
+        current_machine->intc = dev;
+    }
+
+    if (dev) {
+        object_unref(OBJECT(dev));
+    }
     return 0;
 }
 
@@ -4377,11 +4427,21 @@ int main(int argc, char **argv, char **envp)
                                  .kernel_filename = kernel_filename,
                                  .kernel_cmdline = kernel_cmdline,
                                  .initrd_filename = initrd_filename,
-                                 .cpu_model = cpu_model };
+                                 .cpu_model = cpu_model,
+                                 .intc = NULL };
 
     current_machine->init_args = args;
     machine->init(&current_machine->init_args);
 
+    /* Create devices */
+    qemu_opts_foreach(qemu_find_opts("device"), device_create_func, NULL, 1);
+    /* Init devices */
+    qemu_opts_foreach(qemu_find_opts("device"), device_init_func,
+                          &current_machine->init_args, 1);
+    /* Init devices */
+    qemu_opts_foreach(qemu_find_opts("device"), device_connect_func,
+                          &current_machine->init_args, 1);
+
     audio_init();
 
     cpu_synchronize_all_post_init();
@@ -4395,8 +4455,10 @@ int main(int argc, char **argv, char **envp)
     }
 
     /* init generic devices */
-    if (qemu_opts_foreach(qemu_find_opts("device"), device_init_func, NULL, 1) 
!= 0)
+    if (qemu_opts_foreach(qemu_find_opts("device"), device_add_func,
+                          NULL, 1) != 0) {
         exit(1);
+    }
 
     net_check_clients();
 
-- 
1.7.1