diff --git a/Makefile.target b/Makefile.target
index b4fb714..5a29a48 100644
--- a/Makefile.target
+++ b/Makefile.target
@@ -303,6 +303,7 @@
     disas.c \
     dma-helpers.c \
     gdbstub.c \
+    qdev-monitor-android.c \
     qemu-timer.c \
     log-rotate-android.c \
     vl-android.c \
@@ -321,6 +322,7 @@
     util/bitmap.c \
     util/bitops.c \
     ui/keymaps.c \
+    util/qemu-config.c \
     util/qemu-timer-common.c \
     util/iov.c \
 
diff --git a/blockdev.c b/blockdev.c
index 5a024c9..73110e1 100644
--- a/blockdev.c
+++ b/blockdev.c
@@ -451,7 +451,7 @@
         break;
     case IF_VIRTIO:
         /* add virtio block device */
-        opts = qemu_opts_create(qemu_find_opts("device"), NULL, 0);
+        opts = qemu_opts_create(qemu_find_opts("device"), NULL, 0, NULL);
         qemu_opt_set(opts, "driver", "virtio-blk-pci");
         qemu_opt_set(opts, "drive", dinfo->id);
         if (devaddr)
@@ -600,3 +600,15 @@
     return monitor_read_bdrv_key_start(mon, bs, NULL, NULL);
 }
 #endif
+
+QemuOptsList qemu_drive_opts = {
+    .name = "drive",
+    .head = QTAILQ_HEAD_INITIALIZER(qemu_drive_opts.head),
+    .desc = {
+        /*
+         * no elements => accept any params
+         * validation will happen later
+         */
+        { /* end of list */ }
+    },
+};
diff --git a/include/qemu/option.h b/include/qemu/option.h
index 6a70604..e5641f8 100644
--- a/include/qemu/option.h
+++ b/include/qemu/option.h
@@ -28,6 +28,7 @@
 
 #include <stdint.h>
 #include "qemu/queue.h"
+#include "qapi/error.h"
 #include "qapi/qmp/qdict.h"
 
 enum QEMUOptionParType {
@@ -45,6 +46,7 @@
         char* s;
     } value;
     const char *help;
+    bool assigned;
 } QEMUOptionParameter;
 
 
@@ -74,9 +76,13 @@
     QEMUOptionParameter *list);
 QEMUOptionParameter *parse_option_parameters(const char *param,
     QEMUOptionParameter *list, QEMUOptionParameter *dest);
+void parse_option_size(const char *name, const char *value,
+                       uint64_t *ret, Error **errp);
 void free_option_parameters(QEMUOptionParameter *list);
 void print_option_parameters(QEMUOptionParameter *list);
 void print_option_help(QEMUOptionParameter *list);
+bool has_help_option(const char *param);
+bool is_valid_option_list(const char *param);
 
 /* ------------------------------------------------------------------ */
 
@@ -100,32 +106,56 @@
 struct QemuOptsList {
     const char *name;
     const char *implied_opt_name;
+    bool merge_lists;  /* Merge multiple uses of option into a single list? */
     QTAILQ_HEAD(, QemuOpts) head;
     QemuOptDesc desc[];
 };
 
 const char *qemu_opt_get(QemuOpts *opts, const char *name);
-int qemu_opt_get_bool(QemuOpts *opts, const char *name, int defval);
+/**
+ * qemu_opt_has_help_opt:
+ * @opts: options to search for a help request
+ *
+ * Check whether the options specified by @opts include one of the
+ * standard strings which indicate that the user is asking for a
+ * list of the valid values for a command line option (as defined
+ * by is_help_option()).
+ *
+ * Returns: true if @opts includes 'help' or equivalent.
+ */
+bool qemu_opt_has_help_opt(QemuOpts *opts);
+bool qemu_opt_get_bool(QemuOpts *opts, const char *name, bool defval);
 uint64_t qemu_opt_get_number(QemuOpts *opts, const char *name, uint64_t defval);
 uint64_t qemu_opt_get_size(QemuOpts *opts, const char *name, uint64_t defval);
+int qemu_opt_unset(QemuOpts *opts, const char *name);
 int qemu_opt_set(QemuOpts *opts, const char *name, const char *value);
+void qemu_opt_set_err(QemuOpts *opts, const char *name, const char *value,
+                      Error **errp);
+int qemu_opt_set_bool(QemuOpts *opts, const char *name, bool val);
+int qemu_opt_set_number(QemuOpts *opts, const char *name, int64_t val);
 typedef int (*qemu_opt_loopfunc)(const char *name, const char *value, void *opaque);
 int qemu_opt_foreach(QemuOpts *opts, qemu_opt_loopfunc func, void *opaque,
                      int abort_on_failure);
 
 QemuOpts *qemu_opts_find(QemuOptsList *list, const char *id);
-QemuOpts *qemu_opts_create(QemuOptsList *list, const char *id, int fail_if_exists);
+QemuOpts *qemu_opts_create(QemuOptsList *list, const char *id,
+                           int fail_if_exists, Error **errp);
 void qemu_opts_reset(QemuOptsList *list);
 void qemu_opts_loc_restore(QemuOpts *opts);
 int qemu_opts_set(QemuOptsList *list, const char *id,
                   const char *name, const char *value);
 const char *qemu_opts_id(QemuOpts *opts);
+void qemu_opts_set_id(QemuOpts *opts, char *id);
 void qemu_opts_del(QemuOpts *opts);
-int qemu_opts_validate(QemuOpts *opts, const QemuOptDesc *desc);
+void qemu_opts_validate(QemuOpts *opts, const QemuOptDesc *desc, Error **errp);
 int qemu_opts_do_parse(QemuOpts *opts, const char *params, const char *firstname);
 QemuOpts *qemu_opts_parse(QemuOptsList *list, const char *params, int permit_abbrev);
-QemuOpts *qemu_opts_from_qdict(QemuOptsList *list, const QDict *qdict);
+void qemu_opts_set_defaults(QemuOptsList *list, const char *params,
+                            int permit_abbrev);
+QemuOpts *qemu_opts_from_qdict(QemuOptsList *list, const QDict *qdict,
+                               Error **errp);
 QDict *qemu_opts_to_qdict(QemuOpts *opts, QDict *qdict);
+void qemu_opts_absorb_qdict(QemuOpts *opts, QDict *qdict, Error **errp);
 
 typedef int (*qemu_opts_loopfunc)(QemuOpts *opts, void *opaque);
 int qemu_opts_print(QemuOpts *opts, void *dummy);
diff --git a/include/qemu/option_int.h b/include/qemu/option_int.h
new file mode 100644
index 0000000..8212fa4
--- /dev/null
+++ b/include/qemu/option_int.h
@@ -0,0 +1,54 @@
+/*
+ * Commandline option parsing functions
+ *
+ * Copyright (c) 2003-2008 Fabrice Bellard
+ * Copyright (c) 2009 Kevin Wolf <kwolf@redhat.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#ifndef QEMU_OPTIONS_INTERNAL_H
+#define QEMU_OPTIONS_INTERNAL_H
+
+#include "qemu/option.h"
+#include "qemu/error-report.h"
+
+struct QemuOpt {
+    const char   *name;
+    const char   *str;
+
+    const QemuOptDesc *desc;
+    union {
+        bool boolean;
+        uint64_t uint;
+    } value;
+
+    QemuOpts     *opts;
+    QTAILQ_ENTRY(QemuOpt) next;
+};
+
+struct QemuOpts {
+    char *id;
+    QemuOptsList *list;
+    Location loc;
+    QTAILQ_HEAD(QemuOptHead, QemuOpt) head;
+    QTAILQ_ENTRY(QemuOpts) next;
+};
+
+#endif
diff --git a/include/sysemu/sysemu.h b/include/sysemu/sysemu.h
index 34134e4..360a5f2 100644
--- a/include/sysemu/sysemu.h
+++ b/include/sysemu/sysemu.h
@@ -260,4 +260,14 @@
 
 void register_devices(void);
 
+extern QemuOptsList qemu_legacy_drive_opts;
+extern QemuOptsList qemu_common_drive_opts;
+extern QemuOptsList qemu_drive_opts;
+extern QemuOptsList qemu_chardev_opts;
+extern QemuOptsList qemu_device_opts;
+extern QemuOptsList qemu_netdev_opts;
+extern QemuOptsList qemu_net_opts;
+extern QemuOptsList qemu_global_opts;
+extern QemuOptsList qemu_mon_opts;
+
 #endif
diff --git a/qdev-monitor-android.c b/qdev-monitor-android.c
new file mode 100644
index 0000000..1b39077
--- /dev/null
+++ b/qdev-monitor-android.c
@@ -0,0 +1,52 @@
+/*
+ *  Dynamic device configuration and creation.
+ *
+ *  Copyright (c) 2009 CodeSourcery
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "sysemu/sysemu.h"
+
+QemuOptsList qemu_device_opts = {
+    .name = "device",
+    .implied_opt_name = "driver",
+    .head = QTAILQ_HEAD_INITIALIZER(qemu_device_opts.head),
+    .desc = {
+        /*
+         * no elements => accept any
+         * sanity checking will happen later
+         * when setting device properties
+         */
+        { /* end of list */ }
+    },
+};
+
+QemuOptsList qemu_global_opts = {
+    .name = "global",
+    .head = QTAILQ_HEAD_INITIALIZER(qemu_global_opts.head),
+    .desc = {
+        {
+            .name = "driver",
+            .type = QEMU_OPT_STRING,
+        },{
+            .name = "property",
+            .type = QEMU_OPT_STRING,
+        },{
+            .name = "value",
+            .type = QEMU_OPT_STRING,
+        },
+        { /* end of list */ }
+    },
+};
diff --git a/qemu-char.c b/qemu-char.c
index 70b0183..63d2efe 100644
--- a/qemu-char.c
+++ b/qemu-char.c
@@ -2398,7 +2398,7 @@
     const char *p;
     QemuOpts *opts;
 
-    opts = qemu_opts_create(qemu_find_opts("chardev"), label, 1);
+    opts = qemu_opts_create(qemu_find_opts("chardev"), label, 1, NULL);
     if (NULL == opts)
         return NULL;
 
@@ -2741,3 +2741,82 @@
     }
     return NULL;
 }
+
+QemuOptsList qemu_chardev_opts = {
+    .name = "chardev",
+    .implied_opt_name = "backend",
+    .head = QTAILQ_HEAD_INITIALIZER(qemu_chardev_opts.head),
+    .desc = {
+        {
+            .name = "backend",
+            .type = QEMU_OPT_STRING,
+        },{
+            .name = "path",
+            .type = QEMU_OPT_STRING,
+        },{
+            .name = "host",
+            .type = QEMU_OPT_STRING,
+        },{
+            .name = "port",
+            .type = QEMU_OPT_STRING,
+        },{
+            .name = "localaddr",
+            .type = QEMU_OPT_STRING,
+        },{
+            .name = "localport",
+            .type = QEMU_OPT_STRING,
+        },{
+            .name = "to",
+            .type = QEMU_OPT_NUMBER,
+        },{
+            .name = "ipv4",
+            .type = QEMU_OPT_BOOL,
+        },{
+            .name = "ipv6",
+            .type = QEMU_OPT_BOOL,
+        },{
+            .name = "wait",
+            .type = QEMU_OPT_BOOL,
+        },{
+            .name = "server",
+            .type = QEMU_OPT_BOOL,
+        },{
+            .name = "delay",
+            .type = QEMU_OPT_BOOL,
+        },{
+            .name = "telnet",
+            .type = QEMU_OPT_BOOL,
+        },{
+            .name = "width",
+            .type = QEMU_OPT_NUMBER,
+        },{
+            .name = "height",
+            .type = QEMU_OPT_NUMBER,
+        },{
+            .name = "cols",
+            .type = QEMU_OPT_NUMBER,
+        },{
+            .name = "rows",
+            .type = QEMU_OPT_NUMBER,
+        },{
+            .name = "mux",
+            .type = QEMU_OPT_BOOL,
+        },{
+            .name = "signal",
+            .type = QEMU_OPT_BOOL,
+        },{
+            .name = "name",
+            .type = QEMU_OPT_STRING,
+        },{
+            .name = "debug",
+            .type = QEMU_OPT_NUMBER,
+        },{
+            .name = "size",
+            .type = QEMU_OPT_SIZE,
+        },{
+            .name = "chardev",
+            .type = QEMU_OPT_STRING,
+        },
+        { /* end of list */ }
+    },
+};
diff --git a/ui/console.c b/ui/console.c
index e0ca59b..437030b 100644
--- a/ui/console.c
+++ b/ui/console.c
@@ -1602,7 +1602,7 @@
     int width, height;
     char temp[32];
 
-    opts = qemu_opts_create(qemu_find_opts("chardev"), label, 1);
+    opts = qemu_opts_create(qemu_find_opts("chardev"), label, 1, NULL);
     if (NULL == opts)
         return NULL;
 
diff --git a/util/qemu-config.c b/util/qemu-config.c
index 0813ce1..f4e4f38 100644
--- a/util/qemu-config.c
+++ b/util/qemu-config.c
@@ -2,472 +2,16 @@
 #include "qemu/error-report.h"
 #include "qemu/option.h"
 #include "qemu/config-file.h"
+#include "qapi/qmp/qerror.h"
 #include "hw/qdev.h"
+#include "qapi/error.h"
+#include "qmp-commands.h"
 
-static QemuOptsList qemu_drive_opts = {
-    .name = "drive",
-    .head = QTAILQ_HEAD_INITIALIZER(qemu_drive_opts.head),
-    .desc = {
-        {
-            .name = "bus",
-            .type = QEMU_OPT_NUMBER,
-            .help = "bus number",
-        },{
-            .name = "unit",
-            .type = QEMU_OPT_NUMBER,
-            .help = "unit number (i.e. lun for scsi)",
-        },{
-            .name = "if",
-            .type = QEMU_OPT_STRING,
-            .help = "interface (ide, scsi, sd, mtd, floppy, pflash, virtio)",
-        },{
-            .name = "index",
-            .type = QEMU_OPT_NUMBER,
-        },{
-            .name = "cyls",
-            .type = QEMU_OPT_NUMBER,
-            .help = "number of cylinders (ide disk geometry)",
-        },{
-            .name = "heads",
-            .type = QEMU_OPT_NUMBER,
-            .help = "number of heads (ide disk geometry)",
-        },{
-            .name = "secs",
-            .type = QEMU_OPT_NUMBER,
-            .help = "number of sectors (ide disk geometry)",
-        },{
-            .name = "trans",
-            .type = QEMU_OPT_STRING,
-            .help = "chs translation (auto, lba. none)",
-        },{
-            .name = "media",
-            .type = QEMU_OPT_STRING,
-            .help = "media type (disk, cdrom)",
-        },{
-            .name = "snapshot",
-            .type = QEMU_OPT_BOOL,
-        },{
-            .name = "file",
-            .type = QEMU_OPT_STRING,
-            .help = "disk image",
-        },{
-            .name = "cache",
-            .type = QEMU_OPT_STRING,
-            .help = "host cache usage (none, writeback, writethrough, unsafe)",
-        },{
-            .name = "aio",
-            .type = QEMU_OPT_STRING,
-            .help = "host AIO implementation (threads, native)",
-        },{
-            .name = "format",
-            .type = QEMU_OPT_STRING,
-            .help = "disk format (raw, qcow2, ...)",
-        },{
-            .name = "serial",
-            .type = QEMU_OPT_STRING,
-        },{
-            .name = "rerror",
-            .type = QEMU_OPT_STRING,
-        },{
-            .name = "werror",
-            .type = QEMU_OPT_STRING,
-        },{
-            .name = "addr",
-            .type = QEMU_OPT_STRING,
-            .help = "pci address (virtio only)",
-        },{
-            .name = "readonly",
-            .type = QEMU_OPT_BOOL,
-        },
-        { /* end of list */ }
-    },
-};
+static QemuOptsList *vm_config_groups[32];
+static QemuOptsList *drive_config_groups[4];
 
-static QemuOptsList qemu_chardev_opts = {
-    .name = "chardev",
-    .implied_opt_name = "backend",
-    .head = QTAILQ_HEAD_INITIALIZER(qemu_chardev_opts.head),
-    .desc = {
-        {
-            .name = "backend",
-            .type = QEMU_OPT_STRING,
-        },{
-            .name = "path",
-            .type = QEMU_OPT_STRING,
-        },{
-            .name = "host",
-            .type = QEMU_OPT_STRING,
-        },{
-            .name = "port",
-            .type = QEMU_OPT_STRING,
-        },{
-            .name = "localaddr",
-            .type = QEMU_OPT_STRING,
-        },{
-            .name = "localport",
-            .type = QEMU_OPT_STRING,
-        },{
-            .name = "to",
-            .type = QEMU_OPT_NUMBER,
-        },{
-            .name = "ipv4",
-            .type = QEMU_OPT_BOOL,
-        },{
-            .name = "ipv6",
-            .type = QEMU_OPT_BOOL,
-        },{
-            .name = "wait",
-            .type = QEMU_OPT_BOOL,
-        },{
-            .name = "server",
-            .type = QEMU_OPT_BOOL,
-        },{
-            .name = "delay",
-            .type = QEMU_OPT_BOOL,
-        },{
-            .name = "telnet",
-            .type = QEMU_OPT_BOOL,
-        },{
-            .name = "width",
-            .type = QEMU_OPT_NUMBER,
-        },{
-            .name = "height",
-            .type = QEMU_OPT_NUMBER,
-        },{
-            .name = "cols",
-            .type = QEMU_OPT_NUMBER,
-        },{
-            .name = "rows",
-            .type = QEMU_OPT_NUMBER,
-        },{
-            .name = "mux",
-            .type = QEMU_OPT_BOOL,
-        },{
-            .name = "signal",
-            .type = QEMU_OPT_BOOL,
-        },{
-            .name = "name",
-            .type = QEMU_OPT_STRING,
-        },{
-            .name = "debug",
-            .type = QEMU_OPT_NUMBER,
-        },
-        { /* end of list */ }
-    },
-};
-
-QemuOptsList qemu_fsdev_opts = {
-    .name = "fsdev",
-    .implied_opt_name = "fstype",
-    .head = QTAILQ_HEAD_INITIALIZER(qemu_fsdev_opts.head),
-    .desc = {
-        {
-            .name = "fstype",
-            .type = QEMU_OPT_STRING,
-        }, {
-            .name = "path",
-            .type = QEMU_OPT_STRING,
-        }, {
-            .name = "security_model",
-            .type = QEMU_OPT_STRING,
-        },
-        { /*End of list */ }
-    },
-};
-
-QemuOptsList qemu_virtfs_opts = {
-    .name = "virtfs",
-    .implied_opt_name = "fstype",
-    .head = QTAILQ_HEAD_INITIALIZER(qemu_virtfs_opts.head),
-    .desc = {
-        {
-            .name = "fstype",
-            .type = QEMU_OPT_STRING,
-        }, {
-            .name = "path",
-            .type = QEMU_OPT_STRING,
-        }, {
-            .name = "mount_tag",
-            .type = QEMU_OPT_STRING,
-        }, {
-            .name = "security_model",
-            .type = QEMU_OPT_STRING,
-        },
-
-        { /*End of list */ }
-    },
-};
-
-static QemuOptsList qemu_device_opts = {
-    .name = "device",
-    .implied_opt_name = "driver",
-    .head = QTAILQ_HEAD_INITIALIZER(qemu_device_opts.head),
-    .desc = {
-        /*
-         * no elements => accept any
-         * sanity checking will happen later
-         * when setting device properties
-         */
-        { /* end of list */ }
-    },
-};
-
-static QemuOptsList qemu_netdev_opts = {
-    .name = "netdev",
-    .implied_opt_name = "type",
-    .head = QTAILQ_HEAD_INITIALIZER(qemu_netdev_opts.head),
-    .desc = {
-        /*
-         * no elements => accept any params
-         * validation will happen later
-         */
-        { /* end of list */ }
-    },
-};
-
-static QemuOptsList qemu_net_opts = {
-    .name = "net",
-    .implied_opt_name = "type",
-    .head = QTAILQ_HEAD_INITIALIZER(qemu_net_opts.head),
-    .desc = {
-        /*
-         * no elements => accept any params
-         * validation will happen later
-         */
-        { /* end of list */ }
-    },
-};
-
-static QemuOptsList qemu_rtc_opts = {
-    .name = "rtc",
-    .head = QTAILQ_HEAD_INITIALIZER(qemu_rtc_opts.head),
-    .desc = {
-        {
-            .name = "base",
-            .type = QEMU_OPT_STRING,
-        },{
-            .name = "clock",
-            .type = QEMU_OPT_STRING,
-        },{
-            .name = "driftfix",
-            .type = QEMU_OPT_STRING,
-        },
-        { /* end of list */ }
-    },
-};
-
-static QemuOptsList qemu_global_opts = {
-    .name = "global",
-    .head = QTAILQ_HEAD_INITIALIZER(qemu_global_opts.head),
-    .desc = {
-        {
-            .name = "driver",
-            .type = QEMU_OPT_STRING,
-        },{
-            .name = "property",
-            .type = QEMU_OPT_STRING,
-        },{
-            .name = "value",
-            .type = QEMU_OPT_STRING,
-        },
-        { /* end of list */ }
-    },
-};
-
-static QemuOptsList qemu_mon_opts = {
-    .name = "mon",
-    .implied_opt_name = "chardev",
-    .head = QTAILQ_HEAD_INITIALIZER(qemu_mon_opts.head),
-    .desc = {
-        {
-            .name = "mode",
-            .type = QEMU_OPT_STRING,
-        },{
-            .name = "chardev",
-            .type = QEMU_OPT_STRING,
-        },{
-            .name = "default",
-            .type = QEMU_OPT_BOOL,
-        },{
-            .name = "pretty",
-            .type = QEMU_OPT_BOOL,
-        },
-        { /* end of list */ }
-    },
-};
-
-#ifdef CONFIG_SIMPLE_TRACE
-static QemuOptsList qemu_trace_opts = {
-    .name = "trace",
-    .implied_opt_name = "trace",
-    .head = QTAILQ_HEAD_INITIALIZER(qemu_trace_opts.head),
-    .desc = {
-        {
-            .name = "file",
-            .type = QEMU_OPT_STRING,
-        },
-        { /* end if list */ }
-    },
-};
-#endif
-
-static QemuOptsList qemu_cpudef_opts = {
-    .name = "cpudef",
-    .head = QTAILQ_HEAD_INITIALIZER(qemu_cpudef_opts.head),
-    .desc = {
-        {
-            .name = "name",
-            .type = QEMU_OPT_STRING,
-        },{
-            .name = "level",
-            .type = QEMU_OPT_NUMBER,
-        },{
-            .name = "vendor",
-            .type = QEMU_OPT_STRING,
-        },{
-            .name = "family",
-            .type = QEMU_OPT_NUMBER,
-        },{
-            .name = "model",
-            .type = QEMU_OPT_NUMBER,
-        },{
-            .name = "stepping",
-            .type = QEMU_OPT_NUMBER,
-        },{
-            .name = "feature_edx",      /* cpuid 0000_0001.edx */
-            .type = QEMU_OPT_STRING,
-        },{
-            .name = "feature_ecx",      /* cpuid 0000_0001.ecx */
-            .type = QEMU_OPT_STRING,
-        },{
-            .name = "extfeature_edx",   /* cpuid 8000_0001.edx */
-            .type = QEMU_OPT_STRING,
-        },{
-            .name = "extfeature_ecx",   /* cpuid 8000_0001.ecx */
-            .type = QEMU_OPT_STRING,
-        },{
-            .name = "xlevel",
-            .type = QEMU_OPT_NUMBER,
-        },{
-            .name = "model_id",
-            .type = QEMU_OPT_STRING,
-        },{
-            .name = "vendor_override",
-            .type = QEMU_OPT_NUMBER,
-        },
-        { /* end of list */ }
-    },
-};
-
-QemuOptsList qemu_spice_opts = {
-    .name = "spice",
-    .head = QTAILQ_HEAD_INITIALIZER(qemu_spice_opts.head),
-    .desc = {
-        {
-            .name = "port",
-            .type = QEMU_OPT_NUMBER,
-        },{
-            .name = "tls-port",
-            .type = QEMU_OPT_NUMBER,
-        },{
-            .name = "addr",
-            .type = QEMU_OPT_STRING,
-        },{
-            .name = "ipv4",
-            .type = QEMU_OPT_BOOL,
-        },{
-            .name = "ipv6",
-            .type = QEMU_OPT_BOOL,
-        },{
-            .name = "password",
-            .type = QEMU_OPT_STRING,
-        },{
-            .name = "disable-ticketing",
-            .type = QEMU_OPT_BOOL,
-        },{
-            .name = "x509-dir",
-            .type = QEMU_OPT_STRING,
-        },{
-            .name = "x509-key-file",
-            .type = QEMU_OPT_STRING,
-        },{
-            .name = "x509-key-password",
-            .type = QEMU_OPT_STRING,
-        },{
-            .name = "x509-cert-file",
-            .type = QEMU_OPT_STRING,
-        },{
-            .name = "x509-cacert-file",
-            .type = QEMU_OPT_STRING,
-        },{
-            .name = "x509-dh-key-file",
-            .type = QEMU_OPT_STRING,
-        },{
-            .name = "tls-ciphers",
-            .type = QEMU_OPT_STRING,
-        },{
-            .name = "tls-channel",
-            .type = QEMU_OPT_STRING,
-        },{
-            .name = "plaintext-channel",
-            .type = QEMU_OPT_STRING,
-        },{
-            .name = "image-compression",
-            .type = QEMU_OPT_STRING,
-        },{
-            .name = "jpeg-wan-compression",
-            .type = QEMU_OPT_STRING,
-        },{
-            .name = "zlib-glz-wan-compression",
-            .type = QEMU_OPT_STRING,
-        },{
-            .name = "streaming-video",
-            .type = QEMU_OPT_STRING,
-        },{
-            .name = "agent-mouse",
-            .type = QEMU_OPT_BOOL,
-        },{
-            .name = "playback-compression",
-            .type = QEMU_OPT_BOOL,
-        },
-        { /* end if list */ }
-    },
-};
-
-QemuOptsList qemu_option_rom_opts = {
-    .name = "option-rom",
-    .implied_opt_name = "romfile",
-    .head = QTAILQ_HEAD_INITIALIZER(qemu_option_rom_opts.head),
-    .desc = {
-        {
-            .name = "bootindex",
-            .type = QEMU_OPT_NUMBER,
-        }, {
-            .name = "romfile",
-            .type = QEMU_OPT_STRING,
-        },
-        { /* end if list */ }
-    },
-};
-
-static QemuOptsList *vm_config_groups[32] = {
-    &qemu_drive_opts,
-    &qemu_chardev_opts,
-    &qemu_device_opts,
-    &qemu_netdev_opts,
-    &qemu_net_opts,
-    &qemu_rtc_opts,
-    &qemu_global_opts,
-    &qemu_mon_opts,
-    &qemu_cpudef_opts,
-#ifdef CONFIG_SIMPLE_TRACE
-    &qemu_trace_opts,
-#endif
-    &qemu_option_rom_opts,
-    NULL,
-};
-
-static QemuOptsList *find_list(QemuOptsList **lists, const char *group)
+static QemuOptsList *find_list(QemuOptsList **lists, const char *group,
+                               Error **errp)
 {
     int i;
 
@@ -476,14 +20,182 @@
             break;
     }
     if (lists[i] == NULL) {
-        error_report("there is no option group \"%s\"", group);
+        error_setg(errp, "There is no option group '%s'", group);
     }
     return lists[i];
 }
 
 QemuOptsList *qemu_find_opts(const char *group)
 {
-    return find_list(vm_config_groups, group);
+    QemuOptsList *ret;
+    Error *local_err = NULL;
+
+    ret = find_list(vm_config_groups, group, &local_err);
+    if (local_err) {
+        error_report("%s", error_get_pretty(local_err));
+        error_free(local_err);
+    }
+
+    return ret;
+}
+
+QemuOpts *qemu_find_opts_singleton(const char *group)
+{
+    QemuOptsList *list;
+    QemuOpts *opts;
+
+    list = qemu_find_opts(group);
+    assert(list);
+    opts = qemu_opts_find(list, NULL);
+    if (!opts) {
+        opts = qemu_opts_create(list, NULL, 0, &error_abort);
+    }
+    return opts;
+}
+
+static CommandLineParameterInfoList *query_option_descs(const QemuOptDesc *desc)
+{
+    CommandLineParameterInfoList *param_list = NULL, *entry;
+    CommandLineParameterInfo *info;
+    int i;
+
+    for (i = 0; desc[i].name != NULL; i++) {
+        info = g_malloc0(sizeof(*info));
+        info->name = g_strdup(desc[i].name);
+
+        switch (desc[i].type) {
+        case QEMU_OPT_STRING:
+            info->type = COMMAND_LINE_PARAMETER_TYPE_STRING;
+            break;
+        case QEMU_OPT_BOOL:
+            info->type = COMMAND_LINE_PARAMETER_TYPE_BOOLEAN;
+            break;
+        case QEMU_OPT_NUMBER:
+            info->type = COMMAND_LINE_PARAMETER_TYPE_NUMBER;
+            break;
+        case QEMU_OPT_SIZE:
+            info->type = COMMAND_LINE_PARAMETER_TYPE_SIZE;
+            break;
+        }
+
+        if (desc[i].help) {
+            info->has_help = true;
+            info->help = g_strdup(desc[i].help);
+        }
+
+        entry = g_malloc0(sizeof(*entry));
+        entry->value = info;
+        entry->next = param_list;
+        param_list = entry;
+    }
+
+    return param_list;
+}
+
+/* remove repeated entry from the info list */
+static void cleanup_infolist(CommandLineParameterInfoList *head)
+{
+    CommandLineParameterInfoList *pre_entry, *cur, *del_entry;
+
+    cur = head;
+    while (cur->next) {
+        pre_entry = head;
+        while (pre_entry != cur->next) {
+            if (!strcmp(pre_entry->value->name, cur->next->value->name)) {
+                del_entry = cur->next;
+                cur->next = cur->next->next;
+                g_free(del_entry);
+                break;
+            }
+            pre_entry = pre_entry->next;
+        }
+        cur = cur->next;
+    }
+}
+
+/* merge the description items of two parameter infolists */
+static void connect_infolist(CommandLineParameterInfoList *head,
+                             CommandLineParameterInfoList *new)
+{
+    CommandLineParameterInfoList *cur;
+
+    cur = head;
+    while (cur->next) {
+        cur = cur->next;
+    }
+    cur->next = new;
+}
+
+/* access all the local QemuOptsLists for drive option */
+static CommandLineParameterInfoList *get_drive_infolist(void)
+{
+    CommandLineParameterInfoList *head = NULL, *cur;
+    int i;
+
+    for (i = 0; drive_config_groups[i] != NULL; i++) {
+        if (!head) {
+            head = query_option_descs(drive_config_groups[i]->desc);
+        } else {
+            cur = query_option_descs(drive_config_groups[i]->desc);
+            connect_infolist(head, cur);
+        }
+    }
+    cleanup_infolist(head);
+
+    return head;
+}
+
+CommandLineOptionInfoList *qmp_query_command_line_options(bool has_option,
+                                                          const char *option,
+                                                          Error **errp)
+{
+    CommandLineOptionInfoList *conf_list = NULL, *entry;
+    CommandLineOptionInfo *info;
+    int i;
+
+    for (i = 0; vm_config_groups[i] != NULL; i++) {
+        if (!has_option || !strcmp(option, vm_config_groups[i]->name)) {
+            info = g_malloc0(sizeof(*info));
+            info->option = g_strdup(vm_config_groups[i]->name);
+            if (!strcmp("drive", vm_config_groups[i]->name)) {
+                info->parameters = get_drive_infolist();
+            } else {
+                info->parameters =
+                    query_option_descs(vm_config_groups[i]->desc);
+            }
+            entry = g_malloc0(sizeof(*entry));
+            entry->value = info;
+            entry->next = conf_list;
+            conf_list = entry;
+        }
+    }
+
+    if (conf_list == NULL) {
+        error_setg(errp, "invalid option name: %s", option);
+    }
+
+    return conf_list;
+}
+
+QemuOptsList *qemu_find_opts_err(const char *group, Error **errp)
+{
+    return find_list(vm_config_groups, group, errp);
+}
+
+void qemu_add_drive_opts(QemuOptsList *list)
+{
+    int entries, i;
+
+    entries = ARRAY_SIZE(drive_config_groups);
+    entries--; /* keep list NULL terminated */
+    for (i = 0; i < entries; i++) {
+        if (drive_config_groups[i] == NULL) {
+            drive_config_groups[i] = list;
+            return;
+        }
+    }
+    fprintf(stderr, "ran out of space in drive_config_groups");
+    abort();
 }
 
 void qemu_add_opts(QemuOptsList *list)
@@ -533,25 +245,6 @@
     return 0;
 }
 
-int qemu_global_option(const char *str)
-{
-    char driver[64], property[64];
-    QemuOpts *opts;
-    int rc, offset;
-
-    rc = sscanf(str, "%63[^.].%63[^=]%n", driver, property, &offset);
-    if (rc < 2 || str[offset] != '=') {
-        error_report("can't parse: \"%s\"", str);
-        return -1;
-    }
-
-    opts = qemu_opts_create(&qemu_global_opts, NULL, 0);
-    qemu_opt_set(opts, "driver", driver);
-    qemu_opt_set(opts, "property", property);
-    qemu_opt_set(opts, "value", str+offset+1);
-    return 0;
-}
-
 struct ConfigWriteData {
     QemuOptsList *list;
     FILE *fp;
@@ -598,6 +291,7 @@
     char line[1024], group[64], id[64], arg[64], value[1024];
     Location loc;
     QemuOptsList *list = NULL;
+    Error *local_err = NULL;
     QemuOpts *opts = NULL;
     int res = -1, lno = 0;
 
@@ -614,18 +308,24 @@
         }
         if (sscanf(line, "[%63s \"%63[^\"]\"]", group, id) == 2) {
             /* group with id */
-            list = find_list(lists, group);
-            if (list == NULL)
+            list = find_list(lists, group, &local_err);
+            if (local_err) {
+                error_report("%s", error_get_pretty(local_err));
+                error_free(local_err);
                 goto out;
-            opts = qemu_opts_create(list, id, 1);
+            }
+            opts = qemu_opts_create(list, id, 1, NULL);
             continue;
         }
         if (sscanf(line, "[%63[^]]]", group) == 1) {
             /* group without id */
-            list = find_list(lists, group);
-            if (list == NULL)
+            list = find_list(lists, group, &local_err);
+            if (local_err) {
+                error_report("%s", error_get_pretty(local_err));
+                error_free(local_err);
                 goto out;
-            opts = qemu_opts_create(list, NULL, 0);
+            }
+            opts = qemu_opts_create(list, NULL, 0, &error_abort);
             continue;
         }
         if (sscanf(line, " %63s = \"%1023[^\"]\"", arg, value) == 2) {
@@ -670,3 +370,109 @@
         return -EINVAL;
     }
 }
+
+static void config_parse_qdict_section(QDict *options, QemuOptsList *opts,
+                                       Error **errp)
+{
+    QemuOpts *subopts;
+    QDict *subqdict;
+    QList *list = NULL;
+    Error *local_err = NULL;
+    size_t orig_size, enum_size;
+    char *prefix;
+
+    prefix = g_strdup_printf("%s.", opts->name);
+    qdict_extract_subqdict(options, &subqdict, prefix);
+    g_free(prefix);
+    orig_size = qdict_size(subqdict);
+    if (!orig_size) {
+        goto out;
+    }
+
+    subopts = qemu_opts_create(opts, NULL, 0, &local_err);
+    if (local_err) {
+        error_propagate(errp, local_err);
+        goto out;
+    }
+
+    qemu_opts_absorb_qdict(subopts, subqdict, &local_err);
+    if (local_err) {
+        error_propagate(errp, local_err);
+        goto out;
+    }
+
+    enum_size = qdict_size(subqdict);
+    if (enum_size < orig_size && enum_size) {
+        error_setg(errp, "Unknown option '%s' for [%s]",
+                   qdict_first(subqdict)->key, opts->name);
+        goto out;
+    }
+
+    if (enum_size) {
+        /* Multiple, enumerated sections */
+        QListEntry *list_entry;
+        unsigned i = 0;
+
+        /* Not required anymore */
+        qemu_opts_del(subopts);
+
+        qdict_array_split(subqdict, &list);
+        if (qdict_size(subqdict)) {
+            error_setg(errp, "Unused option '%s' for [%s]",
+                       qdict_first(subqdict)->key, opts->name);
+            goto out;
+        }
+
+        QLIST_FOREACH_ENTRY(list, list_entry) {
+            QDict *section = qobject_to_qdict(qlist_entry_obj(list_entry));
+            char *opt_name;
+
+            if (!section) {
+                error_setg(errp, "[%s] section (index %u) does not consist of "
+                           "keys", opts->name, i);
+                goto out;
+            }
+
+            opt_name = g_strdup_printf("%s.%u", opts->name, i++);
+            subopts = qemu_opts_create(opts, opt_name, 1, &local_err);
+            g_free(opt_name);
+            if (local_err) {
+                error_propagate(errp, local_err);
+                goto out;
+            }
+
+            qemu_opts_absorb_qdict(subopts, section, &local_err);
+            if (local_err) {
+                error_propagate(errp, local_err);
+                qemu_opts_del(subopts);
+                goto out;
+            }
+
+            if (qdict_size(section)) {
+                error_setg(errp, "[%s] section doesn't support the option '%s'",
+                           opts->name, qdict_first(section)->key);
+                qemu_opts_del(subopts);
+                goto out;
+            }
+        }
+    }
+
+out:
+    QDECREF(subqdict);
+    QDECREF(list);
+}
+
+void qemu_config_parse_qdict(QDict *options, QemuOptsList **lists,
+                             Error **errp)
+{
+    int i;
+    Error *local_err = NULL;
+
+    for (i = 0; lists[i]; i++) {
+        config_parse_qdict_section(options, lists[i], &local_err);
+        if (local_err) {
+            error_propagate(errp, local_err);
+            return;
+        }
+    }
+}
diff --git a/util/qemu-option.c b/util/qemu-option.c
index 0bfea2d..e1db004 100644
--- a/util/qemu-option.c
+++ b/util/qemu-option.c
@@ -29,8 +29,9 @@
 #include "qemu-common.h"
 #include "qemu/error-report.h"
 #include "qapi/qmp/types.h"
-#include "qemu/option.h"
+#include "qapi/error.h"
 #include "qapi/qmp/qerror.h"
+#include "qemu/option_int.h"
 
 /*
  * Extracts the name of an option from the parameter string (p points at the
@@ -151,7 +152,6 @@
     }
     return 0;
 }
-
 /*
  * Searches an option list for an option with the given name
  */
@@ -168,7 +168,8 @@
     return NULL;
 }
 
-static int parse_option_bool(const char *name, const char *value, int *ret)
+static void parse_option_bool(const char *name, const char *value, bool *ret,
+                              Error **errp)
 {
     if (value != NULL) {
         if (!strcmp(value, "on")) {
@@ -176,16 +177,15 @@
         } else if (!strcmp(value, "off")) {
             *ret = 0;
         } else {
-            qerror_report(QERR_INVALID_PARAMETER_VALUE, name, "'on' or 'off'");
-            return -1;
+            error_set(errp,QERR_INVALID_PARAMETER_VALUE, name, "'on' or 'off'");
         }
     } else {
         *ret = 1;
     }
-    return 0;
 }
 
-static int parse_option_number(const char *name, const char *value, uint64_t *ret)
+static void parse_option_number(const char *name, const char *value,
+                                uint64_t *ret, Error **errp)
 {
     char *postfix;
     uint64_t number;
@@ -193,18 +193,17 @@
     if (value != NULL) {
         number = strtoull(value, &postfix, 0);
         if (*postfix != '\0') {
-            qerror_report(QERR_INVALID_PARAMETER_VALUE, name, "a number");
-            return -1;
+            error_set(errp, QERR_INVALID_PARAMETER_VALUE, name, "a number");
+            return;
         }
         *ret = number;
     } else {
-        qerror_report(QERR_INVALID_PARAMETER_VALUE, name, "a number");
-        return -1;
+        error_set(errp, QERR_INVALID_PARAMETER_VALUE, name, "a number");
     }
-    return 0;
 }
 
-static int parse_option_size(const char *name, const char *value, uint64_t *ret)
+void parse_option_size(const char *name, const char *value,
+                       uint64_t *ret, Error **errp)
 {
     char *postfix;
     double sizef;
@@ -214,28 +213,32 @@
         switch (*postfix) {
         case 'T':
             sizef *= 1024;
+            /* fall through */
         case 'G':
             sizef *= 1024;
+            /* fall through */
         case 'M':
             sizef *= 1024;
+            /* fall through */
         case 'K':
         case 'k':
             sizef *= 1024;
+            /* fall through */
         case 'b':
         case '\0':
             *ret = (uint64_t) sizef;
             break;
         default:
-            qerror_report(QERR_INVALID_PARAMETER_VALUE, name, "a size");
+            error_set(errp, QERR_INVALID_PARAMETER_VALUE, name, "a size");
+#if 0 /* conversion from qerror_report() to error_set() broke this: */
             error_printf_unless_qmp("You may use k, M, G or T suffixes for "
                     "kilobytes, megabytes, gigabytes and terabytes.\n");
-            return -1;
+#endif
+            return;
         }
     } else {
-        qerror_report(QERR_INVALID_PARAMETER_VALUE, name, "a size");
-        return -1;
+        error_set(errp, QERR_INVALID_PARAMETER_VALUE, name, "a size");
     }
-    return 0;
 }
 
 /*
@@ -258,7 +261,8 @@
 int set_option_parameter(QEMUOptionParameter *list, const char *name,
     const char *value)
 {
-    int flag;
+    bool flag;
+    Error *local_err = NULL;
 
     // Find a matching parameter
     list = get_option_parameter(list, name);
@@ -270,9 +274,10 @@
     // Process parameter
     switch (list->type) {
     case OPT_FLAG:
-        if (parse_option_bool(name, value, &flag) == -1)
-            return -1;
-        list->value.n = flag;
+        parse_option_bool(name, value, &flag, &local_err);
+        if (!local_err) {
+            list->value.n = flag;
+        }
         break;
 
     case OPT_STRING:
@@ -285,8 +290,7 @@
         break;
 
     case OPT_SIZE:
-        if (parse_option_size(name, value, &list->value.n) == -1)
-            return -1;
+        parse_option_size(name, value, &list->value.n, &local_err);
         break;
 
     default:
@@ -294,6 +298,14 @@
         return -1;
     }
 
+    if (local_err) {
+        qerror_report_err(local_err);
+        error_free(local_err);
+        return -1;
+    }
+
+    list->assigned = true;
+
     return 0;
 }
 
@@ -325,6 +337,8 @@
         return -1;
     }
 
+    list->assigned = true;
+
     return 0;
 }
 
@@ -416,6 +430,7 @@
     char value[256];
     char *param_delim, *value_delim;
     char next_delim;
+    int i;
 
     if (list == NULL) {
         return NULL;
@@ -425,6 +440,10 @@
         dest = allocated = append_option_parameters(NULL, list);
     }
 
+    for (i = 0; dest[i].name; i++) {
+        dest[i].assigned = false;
+    }
+
     while (*param) {
 
         // Find parameter name and value in the string
@@ -460,6 +479,55 @@
     return NULL;
 }
 
+bool has_help_option(const char *param)
+{
+    size_t buflen = strlen(param) + 1;
+    char *buf = g_malloc0(buflen);
+    const char *p = param;
+    bool result = false;
+
+    while (*p) {
+        p = get_opt_value(buf, buflen, p);
+        if (*p) {
+            p++;
+        }
+
+        if (is_help_option(buf)) {
+            result = true;
+            goto out;
+        }
+    }
+
+out:
+    free(buf);
+    return result;
+}
+
+bool is_valid_option_list(const char *param)
+{
+    size_t buflen = strlen(param) + 1;
+    char *buf = g_malloc0(buflen);
+    const char *p = param;
+    bool result = true;
+
+    while (*p) {
+        p = get_opt_value(buf, buflen, p);
+        if (*p && !*++p) {
+            result = false;
+            goto out;
+        }
+
+        if (!*buf || *buf == ',') {
+            result = false;
+            goto out;
+        }
+    }
+
+out:
+    free(buf);
+    return result;
+}
+
 /*
  * Prints all options of a list that have a value to stdout
  */
@@ -480,7 +548,7 @@
                 printf("%s=%" PRId64 " ", list->name, list->value.n);
                 break;
             default:
-                printf("%s=(unkown type) ", list->name);
+                printf("%s=(unknown type) ", list->name);
                 break;
         }
         list++;
@@ -502,28 +570,6 @@
 
 /* ------------------------------------------------------------------ */
 
-struct QemuOpt {
-    const char   *name;
-    const char   *str;
-
-    const QemuOptDesc *desc;
-    union {
-        int      boolean;
-        uint64_t uint;
-    } value;
-
-    QemuOpts     *opts;
-    QTAILQ_ENTRY(QemuOpt) next;
-};
-
-struct QemuOpts {
-    char *id;
-    QemuOptsList *list;
-    Location loc;
-    QTAILQ_HEAD(QemuOptHead, QemuOpt) head;
-    QTAILQ_ENTRY(QemuOpts) next;
-};
-
 static QemuOpt *qemu_opt_find(QemuOpts *opts, const char *name)
 {
     QemuOpt *opt;
@@ -542,7 +588,19 @@
     return opt ? opt->str : NULL;
 }
 
-int qemu_opt_get_bool(QemuOpts *opts, const char *name, int defval)
+bool qemu_opt_has_help_opt(QemuOpts *opts)
+{
+    QemuOpt *opt;
+
+    QTAILQ_FOREACH_REVERSE(opt, &opts->head, QemuOptHead, next) {
+        if (is_help_option(opt->name)) {
+            return true;
+        }
+    }
+    return false;
+}
+
+bool qemu_opt_get_bool(QemuOpts *opts, const char *name, bool defval)
 {
     QemuOpt *opt = qemu_opt_find(opts, name);
 
@@ -572,20 +630,24 @@
     return opt->value.uint;
 }
 
-static int qemu_opt_parse(QemuOpt *opt)
+static void qemu_opt_parse(QemuOpt *opt, Error **errp)
 {
     if (opt->desc == NULL)
-        return 0;
+        return;
+
     switch (opt->desc->type) {
     case QEMU_OPT_STRING:
         /* nothing */
-        return 0;
+        return;
     case QEMU_OPT_BOOL:
-        return parse_option_bool(opt->name, opt->str, &opt->value.boolean);
+        parse_option_bool(opt->name, opt->str, &opt->value.boolean, errp);
+        break;
     case QEMU_OPT_NUMBER:
-        return parse_option_number(opt->name, opt->str, &opt->value.uint);
+        parse_option_number(opt->name, opt->str, &opt->value.uint, errp);
+        break;
     case QEMU_OPT_SIZE:
-        return parse_option_size(opt->name, opt->str, &opt->value.uint);
+        parse_option_size(opt->name, opt->str, &opt->value.uint, errp);
+        break;
     default:
         abort();
     }
@@ -599,40 +661,130 @@
     g_free(opt);
 }
 
-int qemu_opt_set(QemuOpts *opts, const char *name, const char *value)
+static bool opts_accepts_any(const QemuOpts *opts)
 {
-    QemuOpt *opt;
-    const QemuOptDesc *desc = opts->list->desc;
+    return opts->list->desc[0].name == NULL;
+}
+
+static const QemuOptDesc *find_desc_by_name(const QemuOptDesc *desc,
+                                            const char *name)
+{
     int i;
 
     for (i = 0; desc[i].name != NULL; i++) {
         if (strcmp(desc[i].name, name) == 0) {
-            break;
+            return &desc[i];
         }
     }
-    if (desc[i].name == NULL) {
-        if (i == 0) {
-            /* empty list -> allow any */;
-        } else {
-            qerror_report(QERR_INVALID_PARAMETER, name);
-            return -1;
-        }
+
+    return NULL;
+}
+
+int qemu_opt_unset(QemuOpts *opts, const char *name)
+{
+    QemuOpt *opt = qemu_opt_find(opts, name);
+
+    assert(opts_accepts_any(opts));
+
+    if (opt == NULL) {
+        return -1;
+    } else {
+        qemu_opt_del(opt);
+        return 0;
+    }
+}
+
+static void opt_set(QemuOpts *opts, const char *name, const char *value,
+                    bool prepend, Error **errp)
+{
+    QemuOpt *opt;
+    const QemuOptDesc *desc;
+    Error *local_err = NULL;
+
+    desc = find_desc_by_name(opts->list->desc, name);
+    if (!desc && !opts_accepts_any(opts)) {
+        error_set(errp, QERR_INVALID_PARAMETER, name);
+        return;
     }
 
     opt = g_malloc0(sizeof(*opt));
     opt->name = g_strdup(name);
     opt->opts = opts;
-    QTAILQ_INSERT_TAIL(&opts->head, opt, next);
-    if (desc[i].name != NULL) {
-        opt->desc = desc+i;
+    if (prepend) {
+        QTAILQ_INSERT_HEAD(&opts->head, opt, next);
+    } else {
+        QTAILQ_INSERT_TAIL(&opts->head, opt, next);
     }
-    if (value) {
-        opt->str = g_strdup(value);
-    }
-    if (qemu_opt_parse(opt) < 0) {
+    opt->desc = desc;
+    opt->str = g_strdup(value);
+    qemu_opt_parse(opt, &local_err);
+    if (local_err) {
+        error_propagate(errp, local_err);
         qemu_opt_del(opt);
+    }
+}
+
+int qemu_opt_set(QemuOpts *opts, const char *name, const char *value)
+{
+    Error *local_err = NULL;
+
+    opt_set(opts, name, value, false, &local_err);
+    if (local_err) {
+        qerror_report_err(local_err);
+        error_free(local_err);
         return -1;
     }
+
+    return 0;
+}
+
+void qemu_opt_set_err(QemuOpts *opts, const char *name, const char *value,
+                      Error **errp)
+{
+    opt_set(opts, name, value, false, errp);
+}
+
+int qemu_opt_set_bool(QemuOpts *opts, const char *name, bool val)
+{
+    QemuOpt *opt;
+    const QemuOptDesc *desc = opts->list->desc;
+
+    opt = g_malloc0(sizeof(*opt));
+    opt->desc = find_desc_by_name(desc, name);
+    if (!opt->desc && !opts_accepts_any(opts)) {
+        qerror_report(QERR_INVALID_PARAMETER, name);
+        g_free(opt);
+        return -1;
+    }
+
+    opt->name = g_strdup(name);
+    opt->opts = opts;
+    opt->value.boolean = !!val;
+    opt->str = g_strdup(val ? "on" : "off");
+    QTAILQ_INSERT_TAIL(&opts->head, opt, next);
+
+    return 0;
+}
+
+int qemu_opt_set_number(QemuOpts *opts, const char *name, int64_t val)
+{
+    QemuOpt *opt;
+    const QemuOptDesc *desc = opts->list->desc;
+
+    opt = g_malloc0(sizeof(*opt));
+    opt->desc = find_desc_by_name(desc, name);
+    if (!opt->desc && !opts_accepts_any(opts)) {
+        qerror_report(QERR_INVALID_PARAMETER, name);
+        g_free(opt);
+        return -1;
+    }
+
+    opt->name = g_strdup(name);
+    opt->opts = opts;
+    opt->value.uint = val;
+    opt->str = g_strdup_printf("%" PRId64, val);
+    QTAILQ_INSERT_TAIL(&opts->head, opt, next);
+
     return 0;
 }
 
@@ -655,13 +807,12 @@
     QemuOpts *opts;
 
     QTAILQ_FOREACH(opts, &list->head, next) {
-        if (!opts->id) {
-            continue;
+        if (!opts->id && !id) {
+            return opts;
         }
-        if (strcmp(opts->id, id) != 0) {
-            continue;
+        if (opts->id && id && !strcmp(opts->id, id)) {
+            return opts;
         }
-        return opts;
     }
     return NULL;
 }
@@ -681,30 +832,36 @@
     return 1;
 }
 
-QemuOpts *qemu_opts_create(QemuOptsList *list, const char *id, int fail_if_exists)
+QemuOpts *qemu_opts_create(QemuOptsList *list, const char *id,
+                           int fail_if_exists, Error **errp)
 {
     QemuOpts *opts = NULL;
 
     if (id) {
         if (!id_wellformed(id)) {
-            qerror_report(QERR_INVALID_PARAMETER_VALUE, "id", "an identifier");
+            error_set(errp,QERR_INVALID_PARAMETER_VALUE, "id", "an identifier");
+#if 0 /* conversion from qerror_report() to error_set() broke this: */
             error_printf_unless_qmp("Identifiers consist of letters, digits, '-', '.', '_', starting with a letter.\n");
+#endif
             return NULL;
         }
         opts = qemu_opts_find(list, id);
         if (opts != NULL) {
-            if (fail_if_exists) {
-                qerror_report(QERR_DUPLICATE_ID, id, list->name);
+            if (fail_if_exists && !list->merge_lists) {
+                error_set(errp, QERR_DUPLICATE_ID, id, list->name);
                 return NULL;
             } else {
                 return opts;
             }
         }
+    } else if (list->merge_lists) {
+        opts = qemu_opts_find(list, NULL);
+        if (opts) {
+            return opts;
+        }
     }
     opts = g_malloc0(sizeof(*opts));
-    if (id) {
-        opts->id = g_strdup(id);
-    }
+    opts->id = g_strdup(id);
     opts->list = list;
     loc_save(&opts->loc);
     QTAILQ_INIT(&opts->head);
@@ -730,9 +887,12 @@
                   const char *name, const char *value)
 {
     QemuOpts *opts;
+    Error *local_err = NULL;
 
-    opts = qemu_opts_create(list, id, 1);
-    if (opts == NULL) {
+    opts = qemu_opts_create(list, id, 1, &local_err);
+    if (local_err) {
+        qerror_report_err(local_err);
+        error_free(local_err);
         return -1;
     }
     return qemu_opt_set(opts, name, value);
@@ -743,6 +903,12 @@
     return opts->id;
 }
 
+/* The id string will be g_free()d by qemu_opts_del */
+void qemu_opts_set_id(QemuOpts *opts, char *id)
+{
+    opts->id = id;
+}
+
 void qemu_opts_del(QemuOpts *opts)
 {
     QemuOpt *opt;
@@ -771,10 +937,12 @@
     return 0;
 }
 
-int qemu_opts_do_parse(QemuOpts *opts, const char *params, const char *firstname)
+static int opts_do_parse(QemuOpts *opts, const char *params,
+                         const char *firstname, bool prepend)
 {
     char option[128], value[1024];
     const char *p,*pe,*pc;
+    Error *local_err = NULL;
 
     for (p = params; *p != '\0'; p++) {
         pe = strchr(p, '=');
@@ -806,7 +974,10 @@
         }
         if (strcmp(option, "id") != 0) {
             /* store and parse */
-            if (qemu_opt_set(opts, option, value) == -1) {
+            opt_set(opts, option, value, prepend, &local_err);
+            if (local_err) {
+                qerror_report_err(local_err);
+                error_free(local_err);
                 return -1;
             }
         }
@@ -817,13 +988,19 @@
     return 0;
 }
 
-QemuOpts *qemu_opts_parse(QemuOptsList *list, const char *params,
-                          int permit_abbrev)
+int qemu_opts_do_parse(QemuOpts *opts, const char *params, const char *firstname)
+{
+    return opts_do_parse(opts, params, firstname, false);
+}
+
+static QemuOpts *opts_parse(QemuOptsList *list, const char *params,
+                            int permit_abbrev, bool defaults)
 {
     const char *firstname;
     char value[1024], *id = NULL;
     const char *p;
     QemuOpts *opts;
+    Error *local_err = NULL;
 
     assert(!permit_abbrev || list->implied_opt_name);
     firstname = permit_abbrev ? list->implied_opt_name : NULL;
@@ -835,11 +1012,25 @@
         get_opt_value(value, sizeof(value), p+4);
         id = value;
     }
-    opts = qemu_opts_create(list, id, 1);
-    if (opts == NULL)
-        return NULL;
 
-    if (qemu_opts_do_parse(opts, params, firstname) != 0) {
+    /*
+     * This code doesn't work for defaults && !list->merge_lists: when
+     * params has no id=, and list has an element with !opts->id, it
+     * appends a new element instead of returning the existing opts.
+     * However, we got no use for this case.  Guard against possible
+     * (if unlikely) future misuse:
+     */
+    assert(!defaults || list->merge_lists);
+    opts = qemu_opts_create(list, id, !defaults, &local_err);
+    if (opts == NULL) {
+        if (local_err) {
+            qerror_report_err(local_err);
+            error_free(local_err);
+        }
+        return NULL;
+    }
+
+    if (opts_do_parse(opts, params, firstname, defaults) != 0) {
         qemu_opts_del(opts);
         return NULL;
     }
@@ -847,13 +1038,34 @@
     return opts;
 }
 
+QemuOpts *qemu_opts_parse(QemuOptsList *list, const char *params,
+                          int permit_abbrev)
+{
+    return opts_parse(list, params, permit_abbrev, false);
+}
+
+void qemu_opts_set_defaults(QemuOptsList *list, const char *params,
+                            int permit_abbrev)
+{
+    QemuOpts *opts;
+
+    opts = opts_parse(list, params, permit_abbrev, true);
+    assert(opts);
+}
+
+typedef struct OptsFromQDictState {
+    QemuOpts *opts;
+    Error **errp;
+} OptsFromQDictState;
+
 static void qemu_opts_from_qdict_1(const char *key, QObject *obj, void *opaque)
 {
+    OptsFromQDictState *state = opaque;
     char buf[32];
     const char *value;
     int n;
 
-    if (!strcmp(key, "id")) {
+    if (!strcmp(key, "id") || error_is_set(state->errp)) {
         return;
     }
 
@@ -881,7 +1093,8 @@
     default:
         return;
     }
-    qemu_opt_set(opaque, key, value);
+
+    qemu_opt_set_err(state->opts, key, value, state->errp);
 }
 
 /*
@@ -890,19 +1103,69 @@
  * Only QStrings, QInts, QFloats and QBools are copied.  Entries with
  * other types are silently ignored.
  */
-QemuOpts *qemu_opts_from_qdict(QemuOptsList *list, const QDict *qdict)
+QemuOpts *qemu_opts_from_qdict(QemuOptsList *list, const QDict *qdict,
+                               Error **errp)
 {
+    OptsFromQDictState state;
+    Error *local_err = NULL;
     QemuOpts *opts;
 
-    opts = qemu_opts_create(list, qdict_get_try_str(qdict, "id"), 1);
-    if (opts == NULL)
+    opts = qemu_opts_create(list, qdict_get_try_str(qdict, "id"), 1,
+                            &local_err);
+    if (local_err) {
+        error_propagate(errp, local_err);
         return NULL;
+    }
 
-    qdict_iter(qdict, qemu_opts_from_qdict_1, opts);
+    assert(opts != NULL);
+
+    state.errp = &local_err;
+    state.opts = opts;
+    qdict_iter(qdict, qemu_opts_from_qdict_1, &state);
+    if (local_err) {
+        error_propagate(errp, local_err);
+        qemu_opts_del(opts);
+        return NULL;
+    }
+
     return opts;
 }
 
 /*
+ * Adds all QDict entries to the QemuOpts that can be added and removes them
+ * from the QDict. When this function returns, the QDict contains only those
+ * entries that couldn't be added to the QemuOpts.
+ */
+void qemu_opts_absorb_qdict(QemuOpts *opts, QDict *qdict, Error **errp)
+{
+    const QDictEntry *entry, *next;
+
+    entry = qdict_first(qdict);
+
+    while (entry != NULL) {
+        Error *local_err = NULL;
+        OptsFromQDictState state = {
+            .errp = &local_err,
+            .opts = opts,
+        };
+
+        next = qdict_next(qdict, entry);
+
+        if (find_desc_by_name(opts->list->desc, entry->key)) {
+            qemu_opts_from_qdict_1(entry->key, entry->value, &state);
+            if (local_err) {
+                error_propagate(errp, local_err);
+                return;
+            } else {
+                qdict_del(qdict, entry->key);
+            }
+        }
+
+        entry = next;
+    }
+}
+
+/*
  * Convert from QemuOpts to QDict.
  * The QDict values are of type QString.
  * TODO We'll want to use types appropriate for opt->desc->type, but
@@ -929,33 +1192,26 @@
 /* Validate parsed opts against descriptions where no
  * descriptions were provided in the QemuOptsList.
  */
-int qemu_opts_validate(QemuOpts *opts, const QemuOptDesc *desc)
+void qemu_opts_validate(QemuOpts *opts, const QemuOptDesc *desc, Error **errp)
 {
     QemuOpt *opt;
+    Error *local_err = NULL;
 
-    assert(opts->list->desc[0].name == NULL);
+    assert(opts_accepts_any(opts));
 
     QTAILQ_FOREACH(opt, &opts->head, next) {
-        int i;
-
-        for (i = 0; desc[i].name != NULL; i++) {
-            if (strcmp(desc[i].name, opt->name) == 0) {
-                break;
-            }
-        }
-        if (desc[i].name == NULL) {
-            qerror_report(QERR_INVALID_PARAMETER, opt->name);
-            return -1;
+        opt->desc = find_desc_by_name(desc, opt->name);
+        if (!opt->desc) {
+            error_set(errp, QERR_INVALID_PARAMETER, opt->name);
+            return;
         }
 
-        opt->desc = &desc[i];
-
-        if (qemu_opt_parse(opt) < 0) {
-            return -1;
+        qemu_opt_parse(opt, &local_err);
+        if (local_err) {
+            error_propagate(errp, local_err);
+            return;
         }
     }
-
-    return 0;
 }
 
 int qemu_opts_foreach(QemuOptsList *list, qemu_opts_loopfunc func, void *opaque,
diff --git a/util/qemu-sockets-android.c b/util/qemu-sockets-android.c
index aa06256..371a7e4 100644
--- a/util/qemu-sockets-android.c
+++ b/util/qemu-sockets-android.c
@@ -447,7 +447,7 @@
     char *optstr;
     int sock = -1;
 
-    opts = qemu_opts_create(&dummy_opts, NULL, 0);
+    opts = qemu_opts_create(&dummy_opts, NULL, 0, NULL);
     if (inet_parse(opts, str) == 0) {
         sock = inet_listen_opts(opts, port_offset);
         if (sock != -1 && ostr) {
@@ -474,7 +474,7 @@
     QemuOpts *opts;
     int sock = -1;
 
-    opts = qemu_opts_create(&dummy_opts, NULL, 0);
+    opts = qemu_opts_create(&dummy_opts, NULL, 0, NULL);
     if (inet_parse(opts, str) == 0)
         sock = inet_connect_opts(opts);
     qemu_opts_del(opts);
@@ -558,7 +558,7 @@
     char *path, *optstr;
     int sock, len;
 
-    opts = qemu_opts_create(&dummy_opts, NULL, 0);
+    opts = qemu_opts_create(&dummy_opts, NULL, 0, NULL);
 
     optstr = strchr(str, ',');
     if (optstr) {
@@ -586,7 +586,7 @@
     QemuOpts *opts;
     int sock;
 
-    opts = qemu_opts_create(&dummy_opts, NULL, 0);
+    opts = qemu_opts_create(&dummy_opts, NULL, 0, NULL);
     qemu_opt_set(opts, "path", path);
     sock = unix_connect_opts(opts);
     qemu_opts_del(opts);
diff --git a/vl-android.c b/vl-android.c
index 8c8738a..decfdbb 100644
--- a/vl-android.c
+++ b/vl-android.c
@@ -2128,6 +2128,34 @@
     os_setup_early_signal_handling();
 
     module_call_init(MODULE_INIT_MACHINE);
+
+    module_call_init(MODULE_INIT_QOM);
+
+    qemu_add_opts(&qemu_drive_opts);
+    //qemu_add_drive_opts(&qemu_legacy_drive_opts);
+    //qemu_add_drive_opts(&qemu_common_drive_opts);
+    qemu_add_drive_opts(&qemu_drive_opts);
+    qemu_add_opts(&qemu_chardev_opts);
+    qemu_add_opts(&qemu_device_opts);
+    //qemu_add_opts(&qemu_netdev_opts);
+    //qemu_add_opts(&qemu_net_opts);
+    //qemu_add_opts(&qemu_rtc_opts);
+    //qemu_add_opts(&qemu_global_opts);
+    //qemu_add_opts(&qemu_mon_opts);
+    //qemu_add_opts(&qemu_trace_opts);
+    //qemu_add_opts(&qemu_option_rom_opts);
+    //qemu_add_opts(&qemu_machine_opts);
+    //qemu_add_opts(&qemu_mem_opts);
+    //qemu_add_opts(&qemu_smp_opts);
+    //qemu_add_opts(&qemu_boot_opts);
+    //qemu_add_opts(&qemu_sandbox_opts);
+    //qemu_add_opts(&qemu_add_fd_opts);
+    //qemu_add_opts(&qemu_object_opts);
+    //qemu_add_opts(&qemu_tpmdev_opts);
+    //qemu_add_opts(&qemu_realtime_opts);
+    //qemu_add_opts(&qemu_msg_opts);
+    //qemu_add_opts(&qemu_name_opts);
+
     machine = find_default_machine();
     cpu_model = NULL;
     initrd_filename = NULL;