QemuOpts: switch over -device.

Make -device switch use the QemuOpts framework.
Everything should continue to work like it did before.

New: "-set device.$id.$property=$value" works.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Message-Id:

hw/qdev.c

@@ -120,18 +120,33 @@ static int qdev_print_devinfo(DeviceInfo *info, char *dest, int len)
     return pos;
 }
 
-DeviceState *qdev_device_add(const char *cmdline)
+static int set_property(const char *name, const char *value, void *opaque)
 {
+    DeviceState *dev = opaque;
+
+    if (strcmp(name, "driver") == 0)
+        return 0;
+    if (strcmp(name, "bus") == 0)
+        return 0;
+
+    if (-1 == qdev_prop_parse(dev, name, value)) {
+        fprintf(stderr, "can't set property \"%s\" to \"%s\" for \"%s\"\n",
+                name, value, dev->info->name);
+        return -1;
+    }
+    return 0;
+}
+
+DeviceState *qdev_device_add(QemuOpts *opts)
+{
+    const char *driver, *path, *id;
     DeviceInfo *info;
     DeviceState *qdev;
     BusState *bus;
-    char driver[32], path[128] = "";
-    char tag[32], value[256];
-    const char *params = NULL;
-    int n = 0;
 
-    if (1 != sscanf(cmdline, "%32[^,],%n", driver, &n)) {
+    driver = qemu_opt_get(opts, "driver");
-        fprintf(stderr, "device parse error: \"%s\"\n", cmdline);
+    if (!driver) {
+        fprintf(stderr, "-device: no driver specified\n");
         return NULL;
     }
     if (strcmp(driver, "?") == 0) {
@@ -142,10 +157,8 @@ DeviceState *qdev_device_add(const char *cmdline)
         }
         return NULL;
     }
-    if (n) {
+
-        params = cmdline + n;
+    /* find driver */
-        get_param_value(path, sizeof(path), "bus",  params);
-    }
     info = qdev_find_info(NULL, driver);
     if (!info) {
         fprintf(stderr, "Device \"%s\" not found.  Try -device '?' for a list.\n",
@@ -158,40 +171,26 @@ DeviceState *qdev_device_add(const char *cmdline)
         return NULL;
     }
 
-    if (strlen(path)) {
+    /* find bus */
+    path = qemu_opt_get(opts, "bus");
+    if (path != NULL) {
         bus = qbus_find(path);
-        if (!bus)
-            return NULL;
-        qdev = qdev_create(bus, driver);
     } else {
         bus = qbus_find_recursive(main_system_bus, NULL, info->bus_info);
-        if (!bus)
-            return NULL;
-        qdev = qdev_create(bus, driver);
     }
+    if (!bus)
+        return NULL;
 
-    if (params) {
+    /* create device, set properties */
-        while (params[0]) {
+    qdev = qdev_create(bus, driver);
-            if (2 != sscanf(params, "%31[^=]=%255[^,]%n", tag, value, &n)) {
+    id = qemu_opts_id(opts);
-                fprintf(stderr, "parse error at \"%s\"\n", params);
+    if (id) {
-                break;
+        qdev->id = id;
-            }
+    }
-            params += n;
+    if (qemu_opt_foreach(opts, set_property, qdev, 1) != 0) {
-            if (params[0] == ',')
+        qdev_free(qdev);
-                params++;
+        return NULL;
-            if (strcmp(tag, "bus") == 0)
-                continue;
-            if (strcmp(tag, "id") == 0) {
-                qdev->id = qemu_strdup(value);
-                continue;
-            }
-            if (-1 == qdev_prop_parse(qdev, tag, value)) {
-                fprintf(stderr, "can't set property \"%s\" to \"%s\" for \"%s\"\n",
-                        tag, value, driver);
-            }
-        }
     }
-
     qdev_init(qdev);
     return qdev;
 }
@@ -208,7 +207,6 @@ void qdev_init(DeviceState *dev)
 void qdev_free(DeviceState *dev)
 {
     LIST_REMOVE(dev, sibling);
-    qemu_free(dev->id);
     qemu_free(dev);
 }
 

hw/qdev.h

@@ -3,6 +3,7 @@
 
 #include "hw.h"
 #include "sys-queue.h"
+#include "qemu-option.h"
 
 typedef struct Property Property;
 
@@ -19,7 +20,7 @@ typedef struct BusInfo BusInfo;
 /* This structure should not be accessed directly.  We declare it here
    so that it can be embedded in individual device state structures.  */
 struct DeviceState {
-    char *id;
+    const char *id;
     DeviceInfo *info;
     BusState *parent_bus;
     int num_gpio_out;
@@ -82,7 +83,7 @@ struct CompatProperty {
 /*** Board API.  This should go away once we have a machine config file.  ***/
 
 DeviceState *qdev_create(BusState *bus, const char *name);
-DeviceState *qdev_device_add(const char *cmdline);
+DeviceState *qdev_device_add(QemuOpts *opts);
 void qdev_init(DeviceState *dev);
 void qdev_free(DeviceState *dev);
 

qemu-config.c

@@ -71,8 +71,22 @@ QemuOptsList qemu_drive_opts = {
     },
 };
 
+QemuOptsList qemu_device_opts = {
+    .name = "device",
+    .head = TAILQ_HEAD_INITIALIZER(qemu_device_opts.head),
+    .desc = {
+        /*
+         * no elements => accept any
+         * sanity checking will happen later
+         * when setting device properties
+         */
+        { /* end if list */ }
+    },
+};
+
 static QemuOptsList *lists[] = {
     &qemu_drive_opts,
+    &qemu_device_opts,
     NULL,
 };
 

qemu-config.h

@@ -1,3 +1,4 @@
 extern QemuOptsList qemu_drive_opts;
+extern QemuOptsList qemu_device_opts;
 
 int qemu_set_option(const char *str);

vl.c

@@ -4716,9 +4716,18 @@ char *qemu_find_file(int type, const char *name)
     return buf;
 }
 
+static int device_init_func(QemuOpts *opts, void *opaque)
+{
+    DeviceState *dev;
+
+    dev = qdev_device_add(opts);
+    if (!dev)
+        return -1;
+    return 0;
+}
+
 struct device_config {
     enum {
-        DEV_GENERIC,   /* -device      */
         DEV_USB,       /* -usbdevice   */
         DEV_BT,        /* -bt          */
     } type;
@@ -4752,16 +4761,6 @@ static int foreach_device_config(int type, int (*func)(const char *cmdline))
     return 0;
 }
 
-static int generic_parse(const char *cmdline)
-{
-    DeviceState *dev;
-
-    dev = qdev_device_add(cmdline);
-    if (!dev)
-        return -1;
-    return 0;
-}
-
 int main(int argc, char **argv, char **envp)
 {
     const char *gdbstub_dev = NULL;
@@ -4776,7 +4775,7 @@ int main(int argc, char **argv, char **envp)
     int cyls, heads, secs, translation;
     const char *net_clients[MAX_NET_CLIENTS];
     int nb_net_clients;
-    QemuOpts *hda_opts = NULL;
+    QemuOpts *hda_opts = NULL, *opts;
     int optind;
     const char *r, *optarg;
     CharDriverState *monitor_hd = NULL;
@@ -5386,7 +5385,11 @@ int main(int argc, char **argv, char **envp)
                 add_device_config(DEV_USB, optarg);
                 break;
             case QEMU_OPTION_device:
-                add_device_config(DEV_GENERIC, optarg);
+                opts = qemu_opts_parse(&qemu_device_opts, optarg, "driver");
+                if (!opts) {
+                    fprintf(stderr, "parse error: %s\n", optarg);
+                    exit(1);
+                }
                 break;
             case QEMU_OPTION_smp:
             {
@@ -5922,7 +5925,7 @@ int main(int argc, char **argv, char **envp)
     }
 
     /* init generic devices */
-    if (foreach_device_config(DEV_GENERIC, generic_parse))
+    if (qemu_opts_foreach(&qemu_device_opts, device_init_func, NULL, 1) != 0)
         exit(1);
 
     if (!display_state)