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-rw-r--r--Makefile4
-rw-r--r--block/sheepdog.c5
-rw-r--r--docs/migration.txt2
-rw-r--r--hmp-commands.hx2
-rw-r--r--hw/s390x/s390-virtio-ccw.c150
-rw-r--r--hw/s390x/s390-virtio.c36
-rw-r--r--hw/s390x/s390-virtio.h2
-rw-r--r--include/hw/s390x/s390-virtio-ccw.h40
-rw-r--r--include/io/channel-watch.h20
-rw-r--r--include/io/channel.h3
-rw-r--r--include/qemu/sockets.h17
-rw-r--r--include/sysemu/os-posix.h9
-rw-r--r--include/sysemu/os-win32.h106
-rw-r--r--io/channel-command.c6
-rw-r--r--io/channel-file.c6
-rw-r--r--io/channel-socket.c84
-rw-r--r--io/channel-watch.c152
-rw-r--r--io/channel.c14
-rw-r--r--linux-user/flatload.c1
-rw-r--r--migration/migration.c9
-rw-r--r--migration/qemu-file-unix.c14
-rw-r--r--migration/savevm.c18
-rw-r--r--migration/tcp.c7
-rw-r--r--net/socket.c19
-rw-r--r--pc-bios/s390-ccw/bootmap.c2
-rw-r--r--qapi-schema.json8
-rw-r--r--qemu-char.c96
-rw-r--r--qmp-commands.hx6
-rw-r--r--slirp/slirp.h2
-rw-r--r--slirp/tcp_input.c4
-rw-r--r--target-s390x/cpu-qom.h3
-rw-r--r--target-s390x/cpu.c96
-rw-r--r--target-s390x/cpu.h2
-rw-r--r--target-s390x/helper.c41
-rw-r--r--tests/io-channel-helpers.c6
-rw-r--r--tests/test-io-channel-socket.c92
-rw-r--r--util/oslib-win32.c280
-rw-r--r--util/qemu-coroutine-io.c6
-rw-r--r--util/qemu-sockets.c10
39 files changed, 1034 insertions, 346 deletions
diff --git a/Makefile b/Makefile
index 70e3ebcd50..1d076a9d85 100644
--- a/Makefile
+++ b/Makefile
@@ -238,7 +238,7 @@ qemu-img$(EXESUF): qemu-img.o $(block-obj-y) $(crypto-obj-y) $(io-obj-y) $(qom-o
 qemu-nbd$(EXESUF): qemu-nbd.o $(block-obj-y) $(crypto-obj-y) $(io-obj-y) $(qom-obj-y) libqemuutil.a libqemustub.a
 qemu-io$(EXESUF): qemu-io.o $(block-obj-y) $(crypto-obj-y) $(io-obj-y) $(qom-obj-y) libqemuutil.a libqemustub.a
 
-qemu-bridge-helper$(EXESUF): qemu-bridge-helper.o
+qemu-bridge-helper$(EXESUF): qemu-bridge-helper.o libqemuutil.a libqemustub.a
 
 fsdev/virtfs-proxy-helper$(EXESUF): fsdev/virtfs-proxy-helper.o fsdev/9p-marshal.o fsdev/9p-iov-marshal.o libqemuutil.a libqemustub.a
 fsdev/virtfs-proxy-helper$(EXESUF): LIBS += -lcap
@@ -329,7 +329,7 @@ ifneq ($(EXESUF),)
 qemu-ga: qemu-ga$(EXESUF) $(QGA_VSS_PROVIDER) $(QEMU_GA_MSI)
 endif
 
-ivshmem-client$(EXESUF): $(ivshmem-client-obj-y)
+ivshmem-client$(EXESUF): $(ivshmem-client-obj-y) libqemuutil.a libqemustub.a
 	$(call LINK, $^)
 ivshmem-server$(EXESUF): $(ivshmem-server-obj-y) libqemuutil.a libqemustub.a
 	$(call LINK, $^)
diff --git a/block/sheepdog.c b/block/sheepdog.c
index 8739accddd..05677ed983 100644
--- a/block/sheepdog.c
+++ b/block/sheepdog.c
@@ -615,14 +615,13 @@ static coroutine_fn int send_co_req(int sockfd, SheepdogReq *hdr, void *data,
     ret = qemu_co_send(sockfd, hdr, sizeof(*hdr));
     if (ret != sizeof(*hdr)) {
         error_report("failed to send a req, %s", strerror(errno));
-        ret = -socket_error();
-        return ret;
+        return -errno;
     }
 
     ret = qemu_co_send(sockfd, data, *wlen);
     if (ret != *wlen) {
-        ret = -socket_error();
         error_report("failed to send a req, %s", strerror(errno));
+        return -errno;
     }
 
     return ret;
diff --git a/docs/migration.txt b/docs/migration.txt
index fda8d61d69..90209ab294 100644
--- a/docs/migration.txt
+++ b/docs/migration.txt
@@ -333,7 +333,7 @@ doesn't finish in a given time the switch is made to postcopy.
 To enable postcopy, issue this command on the monitor prior to the
 start of migration:
 
-migrate_set_capability x-postcopy-ram on
+migrate_set_capability postcopy-ram on
 
 The normal commands are then used to start a migration, which is still
 started in precopy mode.  Issuing:
diff --git a/hmp-commands.hx b/hmp-commands.hx
index 664d794f29..639205b692 100644
--- a/hmp-commands.hx
+++ b/hmp-commands.hx
@@ -1026,7 +1026,7 @@ ETEXI
         .args_type  = "",
         .params     = "",
         .help       = "Followup to a migration command to switch the migration"
-                      " to postcopy mode. The x-postcopy-ram capability must "
+                      " to postcopy mode. The postcopy-ram capability must "
                       "be set before the original migration command.",
         .mhandler.cmd = hmp_migrate_start_postcopy,
     },
diff --git a/hw/s390x/s390-virtio-ccw.c b/hw/s390x/s390-virtio-ccw.c
index 89f5d0d6a6..3d8c3c4fa8 100644
--- a/hw/s390x/s390-virtio-ccw.c
+++ b/hw/s390x/s390-virtio-ccw.c
@@ -22,20 +22,7 @@
 #include "s390-pci-bus.h"
 #include "hw/s390x/storage-keys.h"
 #include "hw/compat.h"
-
-#define TYPE_S390_CCW_MACHINE               "s390-ccw-machine"
-
-#define S390_CCW_MACHINE(obj) \
-    OBJECT_CHECK(S390CcwMachineState, (obj), TYPE_S390_CCW_MACHINE)
-
-typedef struct S390CcwMachineState {
-    /*< private >*/
-    MachineState parent_obj;
-
-    /*< public >*/
-    bool aes_key_wrap;
-    bool dea_key_wrap;
-} S390CcwMachineState;
+#include "hw/s390x/s390-virtio-ccw.h"
 
 static const char *const reset_dev_types[] = {
     "virtual-css-bridge",
@@ -136,7 +123,7 @@ static void ccw_init(MachineState *machine)
     virtio_ccw_register_hcalls();
 
     /* init CPUs */
-    s390_init_cpus(machine->cpu_model);
+    s390_init_cpus(machine);
 
     if (kvm_enabled()) {
         kvm_s390_enable_css_support(s390_cpu_addr2state(0));
@@ -156,13 +143,54 @@ static void ccw_init(MachineState *machine)
                     gtod_save, gtod_load, kvm_state);
 }
 
+static void s390_cpu_plug(HotplugHandler *hotplug_dev,
+                        DeviceState *dev, Error **errp)
+{
+    gchar *name;
+    S390CPU *cpu = S390_CPU(dev);
+    CPUState *cs = CPU(dev);
+
+    name = g_strdup_printf("cpu[%i]", cpu->env.cpu_num);
+    object_property_set_link(OBJECT(hotplug_dev), OBJECT(cs), name,
+                             errp);
+    g_free(name);
+}
+
+static void s390_machine_device_plug(HotplugHandler *hotplug_dev,
+                                     DeviceState *dev, Error **errp)
+{
+    if (object_dynamic_cast(OBJECT(dev), TYPE_CPU)) {
+        s390_cpu_plug(hotplug_dev, dev, errp);
+    }
+}
+
+static HotplugHandler *s390_get_hotplug_handler(MachineState *machine,
+                                                DeviceState *dev)
+{
+    if (object_dynamic_cast(OBJECT(dev), TYPE_CPU)) {
+        return HOTPLUG_HANDLER(machine);
+    }
+    return NULL;
+}
+
+static void s390_hot_add_cpu(const int64_t id, Error **errp)
+{
+    MachineState *machine = MACHINE(qdev_get_machine());
+    Error *err = NULL;
+
+    s390x_new_cpu(machine->cpu_model, id, &err);
+    error_propagate(errp, err);
+}
+
 static void ccw_machine_class_init(ObjectClass *oc, void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
     NMIClass *nc = NMI_CLASS(oc);
+    HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(oc);
 
     mc->init = ccw_init;
     mc->reset = s390_machine_reset;
+    mc->hot_add_cpu = s390_hot_add_cpu;
     mc->block_default_type = IF_VIRTIO;
     mc->no_cdrom = 1;
     mc->no_floppy = 1;
@@ -171,6 +199,8 @@ static void ccw_machine_class_init(ObjectClass *oc, void *data)
     mc->no_sdcard = 1;
     mc->use_sclp = 1;
     mc->max_cpus = 255;
+    mc->get_hotplug_handler = s390_get_hotplug_handler;
+    hc->plug = s390_machine_device_plug;
     nc->nmi_monitor_handler = s390_nmi;
 }
 
@@ -232,10 +262,40 @@ static const TypeInfo ccw_machine_info = {
     .class_init    = ccw_machine_class_init,
     .interfaces = (InterfaceInfo[]) {
         { TYPE_NMI },
+        { TYPE_HOTPLUG_HANDLER},
         { }
     },
 };
 
+#define DEFINE_CCW_MACHINE(suffix, verstr, latest)                            \
+    static void ccw_machine_##suffix##_class_init(ObjectClass *oc,            \
+                                                  void *data)                 \
+    {                                                                         \
+        MachineClass *mc = MACHINE_CLASS(oc);                                 \
+        ccw_machine_##suffix##_class_options(mc);                             \
+        mc->desc = "VirtIO-ccw based S390 machine v" verstr;                  \
+        if (latest) {                                                         \
+            mc->alias = "s390-ccw-virtio";                                    \
+            mc->is_default = 1;                                               \
+        }                                                                     \
+    }                                                                         \
+    static void ccw_machine_##suffix##_instance_init(Object *obj)             \
+    {                                                                         \
+        MachineState *machine = MACHINE(obj);                                 \
+        ccw_machine_##suffix##_instance_options(machine);                     \
+    }                                                                         \
+    static const TypeInfo ccw_machine_##suffix##_info = {                     \
+        .name = MACHINE_TYPE_NAME("s390-ccw-virtio-" verstr),                 \
+        .parent = TYPE_S390_CCW_MACHINE,                                      \
+        .class_init = ccw_machine_##suffix##_class_init,                      \
+        .instance_init = ccw_machine_##suffix##_instance_init,                \
+    };                                                                        \
+    static void ccw_machine_register_##suffix(void)                           \
+    {                                                                         \
+        type_register_static(&ccw_machine_##suffix##_info);                   \
+    }                                                                         \
+    machine_init(ccw_machine_register_##suffix)
+
 #define CCW_COMPAT_2_5 \
         HW_COMPAT_2_5
 
@@ -280,63 +340,39 @@ static const TypeInfo ccw_machine_info = {
             .value    = "0",\
         },
 
-static void ccw_machine_2_4_class_init(ObjectClass *oc, void *data)
+static void ccw_machine_2_6_instance_options(MachineState *machine)
 {
-    MachineClass *mc = MACHINE_CLASS(oc);
-    static GlobalProperty compat_props[] = {
-        CCW_COMPAT_2_4
-        { /* end of list */ }
-    };
-
-    mc->desc = "VirtIO-ccw based S390 machine v2.4";
-    mc->compat_props = compat_props;
 }
 
-static const TypeInfo ccw_machine_2_4_info = {
-    .name          = MACHINE_TYPE_NAME("s390-ccw-virtio-2.4"),
-    .parent        = TYPE_S390_CCW_MACHINE,
-    .class_init    = ccw_machine_2_4_class_init,
-};
-
-static void ccw_machine_2_5_class_init(ObjectClass *oc, void *data)
+static void ccw_machine_2_6_class_options(MachineClass *mc)
 {
-    MachineClass *mc = MACHINE_CLASS(oc);
-    static GlobalProperty compat_props[] = {
-        CCW_COMPAT_2_5
-        { /* end of list */ }
-    };
-
-    mc->desc = "VirtIO-ccw based S390 machine v2.5";
-    mc->compat_props = compat_props;
 }
+DEFINE_CCW_MACHINE(2_6, "2.6", true);
 
-static const TypeInfo ccw_machine_2_5_info = {
-    .name          = MACHINE_TYPE_NAME("s390-ccw-virtio-2.5"),
-    .parent        = TYPE_S390_CCW_MACHINE,
-    .class_init    = ccw_machine_2_5_class_init,
-};
+static void ccw_machine_2_5_instance_options(MachineState *machine)
+{
+}
 
-static void ccw_machine_2_6_class_init(ObjectClass *oc, void *data)
+static void ccw_machine_2_5_class_options(MachineClass *mc)
 {
-    MachineClass *mc = MACHINE_CLASS(oc);
+    SET_MACHINE_COMPAT(mc, CCW_COMPAT_2_5);
+}
+DEFINE_CCW_MACHINE(2_5, "2.5", false);
 
-    mc->alias = "s390-ccw-virtio";
-    mc->desc = "VirtIO-ccw based S390 machine v2.6";
-    mc->is_default = 1;
+static void ccw_machine_2_4_instance_options(MachineState *machine)
+{
+    ccw_machine_2_5_instance_options(machine);
 }
 
-static const TypeInfo ccw_machine_2_6_info = {
-    .name          = MACHINE_TYPE_NAME("s390-ccw-virtio-2.6"),
-    .parent        = TYPE_S390_CCW_MACHINE,
-    .class_init    = ccw_machine_2_6_class_init,
-};
+static void ccw_machine_2_4_class_options(MachineClass *mc)
+{
+    SET_MACHINE_COMPAT(mc, CCW_COMPAT_2_4);
+}
+DEFINE_CCW_MACHINE(2_4, "2.4", false);
 
 static void ccw_machine_register_types(void)
 {
     type_register_static(&ccw_machine_info);
-    type_register_static(&ccw_machine_2_4_info);
-    type_register_static(&ccw_machine_2_5_info);
-    type_register_static(&ccw_machine_2_6_info);
 }
 
 type_init(ccw_machine_register_types)
diff --git a/hw/s390x/s390-virtio.c b/hw/s390x/s390-virtio.c
index 8e533ae88a..7c6e281af1 100644
--- a/hw/s390x/s390-virtio.c
+++ b/hw/s390x/s390-virtio.c
@@ -58,15 +58,16 @@
 #define S390_TOD_CLOCK_VALUE_MISSING    0x00
 #define S390_TOD_CLOCK_VALUE_PRESENT    0x01
 
-static S390CPU **ipi_states;
+static S390CPU **cpu_states;
 
 S390CPU *s390_cpu_addr2state(uint16_t cpu_addr)
 {
-    if (cpu_addr >= smp_cpus) {
+    if (cpu_addr >= max_cpus) {
         return NULL;
     }
 
-    return ipi_states[cpu_addr];
+    /* Fast lookup via CPU ID */
+    return cpu_states[cpu_addr];
 }
 
 void s390_init_ipl_dev(const char *kernel_filename,
@@ -93,26 +94,29 @@ void s390_init_ipl_dev(const char *kernel_filename,
     qdev_init_nofail(dev);
 }
 
-void s390_init_cpus(const char *cpu_model)
+void s390_init_cpus(MachineState *machine)
 {
     int i;
+    gchar *name;
 
-    if (cpu_model == NULL) {
-        cpu_model = "host";
+    if (machine->cpu_model == NULL) {
+        machine->cpu_model = "host";
     }
 
-    ipi_states = g_malloc(sizeof(S390CPU *) * smp_cpus);
+    cpu_states = g_new0(S390CPU *, max_cpus);
 
-    for (i = 0; i < smp_cpus; i++) {
-        S390CPU *cpu;
-        CPUState *cs;
-
-        cpu = cpu_s390x_init(cpu_model);
-        cs = CPU(cpu);
+    for (i = 0; i < max_cpus; i++) {
+        name = g_strdup_printf("cpu[%i]", i);
+        object_property_add_link(OBJECT(machine), name, TYPE_S390_CPU,
+                                 (Object **) &cpu_states[i],
+                                 object_property_allow_set_link,
+                                 OBJ_PROP_LINK_UNREF_ON_RELEASE,
+                                 &error_abort);
+        g_free(name);
+    }
 
-        ipi_states[i] = cpu;
-        cs->halted = 1;
-        cs->exception_index = EXCP_HLT;
+    for (i = 0; i < smp_cpus; i++) {
+        s390x_new_cpu(machine->cpu_model, i, &error_fatal);
     }
 }
 
diff --git a/hw/s390x/s390-virtio.h b/hw/s390x/s390-virtio.h
index eebce8e5e6..ffd014cb5b 100644
--- a/hw/s390x/s390-virtio.h
+++ b/hw/s390x/s390-virtio.h
@@ -19,7 +19,7 @@
 typedef int (*s390_virtio_fn)(const uint64_t *args);
 void s390_register_virtio_hypercall(uint64_t code, s390_virtio_fn fn);
 
-void s390_init_cpus(const char *cpu_model);
+void s390_init_cpus(MachineState *machine);
 void s390_init_ipl_dev(const char *kernel_filename,
                        const char *kernel_cmdline,
                        const char *initrd_filename,
diff --git a/include/hw/s390x/s390-virtio-ccw.h b/include/hw/s390x/s390-virtio-ccw.h
new file mode 100644
index 0000000000..ab08332fe1
--- /dev/null
+++ b/include/hw/s390x/s390-virtio-ccw.h
@@ -0,0 +1,40 @@
+/*
+ * virtio ccw machine definitions
+ *
+ * Copyright 2012, 2016 IBM Corp.
+ * Author(s): Cornelia Huck <cornelia.huck@de.ibm.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or (at
+ * your option) any later version. See the COPYING file in the top-level
+ * directory.
+ */
+#ifndef HW_S390X_S390_VIRTIO_CCW_H
+#define HW_S390X_S390_VIRTIO_CCW_H
+
+#include "hw/boards.h"
+
+#define TYPE_S390_CCW_MACHINE               "s390-ccw-machine"
+
+#define S390_CCW_MACHINE(obj) \
+    OBJECT_CHECK(S390CcwMachineState, (obj), TYPE_S390_CCW_MACHINE)
+
+#define S390_MACHINE_CLASS(klass) \
+    OBJECT_CLASS_CHECK(S390CcwMachineClass, (klass), TYPE_S390_CCW_MACHINE)
+
+typedef struct S390CcwMachineState {
+    /*< private >*/
+    MachineState parent_obj;
+
+    /*< public >*/
+    bool aes_key_wrap;
+    bool dea_key_wrap;
+} S390CcwMachineState;
+
+typedef struct S390CcwMachineClass {
+    /*< private >*/
+    MachineClass parent_class;
+
+    /*< public >*/
+} S390CcwMachineClass;
+
+#endif
diff --git a/include/io/channel-watch.h b/include/io/channel-watch.h
index 656358ad64..76d764223e 100644
--- a/include/io/channel-watch.h
+++ b/include/io/channel-watch.h
@@ -39,7 +39,7 @@
  * monitor the file descriptor @fd for the
  * I/O conditions in @condition. This is able
  * monitor block devices, character devices,
- * sockets, pipes but not plain files.
+ * pipes but not plain files or, on Win32, sockets.
  *
  * Returns: the new main loop source
  */
@@ -48,6 +48,24 @@ GSource *qio_channel_create_fd_watch(QIOChannel *ioc,
                                      GIOCondition condition);
 
 /**
+ * qio_channel_create_socket_watch:
+ * @ioc: the channel object
+ * @fd: the file descriptor
+ * @condition: the I/O condition
+ *
+ * Create a new main loop source that is able to
+ * monitor the file descriptor @fd for the
+ * I/O conditions in @condition. This is equivalent
+ * to qio_channel_create_fd_watch on POSIX systems
+ * but not on Windows.
+ *
+ * Returns: the new main loop source
+ */
+GSource *qio_channel_create_socket_watch(QIOChannel *ioc,
+                                         int fd,
+                                         GIOCondition condition);
+
+/**
  * qio_channel_create_fd_pair_watch:
  * @ioc: the channel object
  * @fdread: the file descriptor for reading
diff --git a/include/io/channel.h b/include/io/channel.h
index 0a1f1ce7fc..d37acd29e0 100644
--- a/include/io/channel.h
+++ b/include/io/channel.h
@@ -78,6 +78,9 @@ typedef gboolean (*QIOChannelFunc)(QIOChannel *ioc,
 struct QIOChannel {
     Object parent;
     unsigned int features; /* bitmask of QIOChannelFeatures */
+#ifdef _WIN32
+    HANDLE event; /* For use with GSource on Win32 */
+#endif
 };
 
 /**
diff --git a/include/qemu/sockets.h b/include/qemu/sockets.h
index 0be68de87d..1bd92180f3 100644
--- a/include/qemu/sockets.h
+++ b/include/qemu/sockets.h
@@ -3,26 +3,9 @@
 #define QEMU_SOCKET_H
 
 #ifdef _WIN32
-#include <windows.h>
-#include <winsock2.h>
-#include <ws2tcpip.h>
-
-#define socket_error() WSAGetLastError()
 
 int inet_aton(const char *cp, struct in_addr *ia);
 
-#else
-
-#include <sys/socket.h>
-#include <netinet/in.h>
-#include <netinet/tcp.h>
-#include <arpa/inet.h>
-#include <netdb.h>
-#include <sys/un.h>
-
-#define socket_error() errno
-#define closesocket(s) close(s)
-
 #endif /* !_WIN32 */
 
 #include "qapi-types.h"
diff --git a/include/sysemu/os-posix.h b/include/sysemu/os-posix.h
index 5b9c4d6143..07e3e5ae9b 100644
--- a/include/sysemu/os-posix.h
+++ b/include/sysemu/os-posix.h
@@ -26,6 +26,12 @@
 #ifndef QEMU_OS_POSIX_H
 #define QEMU_OS_POSIX_H
 
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <netinet/tcp.h>
+#include <arpa/inet.h>
+#include <netdb.h>
+#include <sys/un.h>
 
 void os_set_line_buffering(void);
 void os_set_proc_name(const char *s);
@@ -34,6 +40,9 @@ void os_daemonize(void);
 void os_setup_post(void);
 int os_mlock(void);
 
+#define closesocket(s) close(s)
+#define ioctlsocket(s, r, v) ioctl(s, r, v)
+
 typedef struct timeval qemu_timeval;
 #define qemu_gettimeofday(tp) gettimeofday(tp, NULL)
 
diff --git a/include/sysemu/os-win32.h b/include/sysemu/os-win32.h
index fbed346716..17aad3b20f 100644
--- a/include/sysemu/os-win32.h
+++ b/include/sysemu/os-win32.h
@@ -28,32 +28,7 @@
 
 #include <winsock2.h>
 #include <windows.h>
-
-/* Workaround for older versions of MinGW. */
-#ifndef ECONNREFUSED
-# define ECONNREFUSED WSAECONNREFUSED
-#endif
-#ifndef EINPROGRESS
-# define EINPROGRESS  WSAEINPROGRESS
-#endif
-#ifndef EHOSTUNREACH
-# define EHOSTUNREACH WSAEHOSTUNREACH
-#endif
-#ifndef EINTR
-# define EINTR        WSAEINTR
-#endif
-#ifndef EINPROGRESS
-# define EINPROGRESS  WSAEINPROGRESS
-#endif
-#ifndef ENETUNREACH
-# define ENETUNREACH  WSAENETUNREACH
-#endif
-#ifndef ENOTCONN
-# define ENOTCONN     WSAENOTCONN
-#endif
-#ifndef EWOULDBLOCK
-# define EWOULDBLOCK  WSAEWOULDBLOCK
-#endif
+#include <ws2tcpip.h>
 
 #if defined(_WIN64)
 /* On w64, setjmp is implemented by _setjmp which needs a second parameter.
@@ -80,7 +55,6 @@ struct tm *gmtime_r(const time_t *timep, struct tm *result);
 struct tm *localtime_r(const time_t *timep, struct tm *result);
 #endif /* CONFIG_LOCALTIME_R */
 
-
 static inline void os_setup_signal_handling(void) {}
 static inline void os_daemonize(void) {}
 static inline void os_setup_post(void) {}
@@ -129,4 +103,82 @@ static inline char *realpath(const char *path, char *resolved_path)
     return resolved_path;
 }
 
+
+/* We wrap all the sockets functions so that we can
+ * set errno based on WSAGetLastError()
+ */
+
+#undef connect
+#define connect qemu_connect_wrap
+int qemu_connect_wrap(int sockfd, const struct sockaddr *addr,
+                      socklen_t addrlen);
+
+#undef listen
+#define listen qemu_listen_wrap
+int qemu_listen_wrap(int sockfd, int backlog);
+
+#undef bind
+#define bind qemu_bind_wrap
+int qemu_bind_wrap(int sockfd, const struct sockaddr *addr,
+                   socklen_t addrlen);
+
+#undef socket
+#define socket qemu_socket_wrap
+int qemu_socket_wrap(int domain, int type, int protocol);
+
+#undef accept
+#define accept qemu_accept_wrap
+int qemu_accept_wrap(int sockfd, struct sockaddr *addr,
+                     socklen_t *addrlen);
+
+#undef shutdown
+#define shutdown qemu_shutdown_wrap
+int qemu_shutdown_wrap(int sockfd, int how);
+
+#undef ioctlsocket
+#define ioctlsocket qemu_ioctlsocket_wrap
+int qemu_ioctlsocket_wrap(int fd, int req, void *val);
+
+#undef closesocket
+#define closesocket qemu_closesocket_wrap
+int qemu_closesocket_wrap(int fd);
+
+#undef getsockopt
+#define getsockopt qemu_getsockopt_wrap
+int qemu_getsockopt_wrap(int sockfd, int level, int optname,
+                         void *optval, socklen_t *optlen);
+
+#undef setsockopt
+#define setsockopt qemu_setsockopt_wrap
+int qemu_setsockopt_wrap(int sockfd, int level, int optname,
+                         const void *optval, socklen_t optlen);
+
+#undef getpeername
+#define getpeername qemu_getpeername_wrap
+int qemu_getpeername_wrap(int sockfd, struct sockaddr *addr,
+                          socklen_t *addrlen);
+
+#undef getsockname
+#define getsockname qemu_getsockname_wrap
+int qemu_getsockname_wrap(int sockfd, struct sockaddr *addr,
+                          socklen_t *addrlen);
+
+#undef send
+#define send qemu_send_wrap
+ssize_t qemu_send_wrap(int sockfd, const void *buf, size_t len, int flags);
+
+#undef sendto
+#define sendto qemu_sendto_wrap
+ssize_t qemu_sendto_wrap(int sockfd, const void *buf, size_t len, int flags,
+                         const struct sockaddr *addr, socklen_t addrlen);
+
+#undef recv
+#define recv qemu_recv_wrap
+ssize_t qemu_recv_wrap(int sockfd, void *buf, size_t len, int flags);
+
+#undef recvfrom
+#define recvfrom qemu_recvfrom_wrap
+ssize_t qemu_recvfrom_wrap(int sockfd, void *buf, size_t len, int flags,
+                           struct sockaddr *addr, socklen_t *addrlen);
+
 #endif
diff --git a/io/channel-command.c b/io/channel-command.c
index f53ce0f4f4..604514adfc 100644
--- a/io/channel-command.c
+++ b/io/channel-command.c
@@ -236,8 +236,7 @@ static ssize_t qio_channel_command_readv(QIOChannel *ioc,
  retry:
     ret = readv(cioc->readfd, iov, niov);
     if (ret < 0) {
-        if (errno == EAGAIN ||
-            errno == EWOULDBLOCK) {
+        if (errno == EAGAIN) {
             return QIO_CHANNEL_ERR_BLOCK;
         }
         if (errno == EINTR) {
@@ -265,8 +264,7 @@ static ssize_t qio_channel_command_writev(QIOChannel *ioc,
  retry:
     ret = writev(cioc->writefd, iov, niov);
     if (ret <= 0) {
-        if (errno == EAGAIN ||
-            errno == EWOULDBLOCK) {
+        if (errno == EAGAIN) {
             return QIO_CHANNEL_ERR_BLOCK;
         }
         if (errno == EINTR) {
diff --git a/io/channel-file.c b/io/channel-file.c
index 19a432562a..f28e2b0a5c 100644
--- a/io/channel-file.c
+++ b/io/channel-file.c
@@ -96,8 +96,7 @@ static ssize_t qio_channel_file_readv(QIOChannel *ioc,
  retry:
     ret = readv(fioc->fd, iov, niov);
     if (ret < 0) {
-        if (errno == EAGAIN ||
-            errno == EWOULDBLOCK) {
+        if (errno == EAGAIN) {
             return QIO_CHANNEL_ERR_BLOCK;
         }
         if (errno == EINTR) {
@@ -125,8 +124,7 @@ static ssize_t qio_channel_file_writev(QIOChannel *ioc,
  retry:
     ret = writev(fioc->fd, iov, niov);
     if (ret <= 0) {
-        if (errno == EAGAIN ||
-            errno == EWOULDBLOCK) {
+        if (errno == EAGAIN) {
             return QIO_CHANNEL_ERR_BLOCK;
         }
         if (errno == EINTR) {
diff --git a/io/channel-socket.c b/io/channel-socket.c
index bf66a78235..d005070584 100644
--- a/io/channel-socket.c
+++ b/io/channel-socket.c
@@ -55,6 +55,10 @@ qio_channel_socket_new(void)
     ioc = QIO_CHANNEL(sioc);
     ioc->features |= (1 << QIO_CHANNEL_FEATURE_SHUTDOWN);
 
+#ifdef WIN32
+    ioc->event = CreateEvent(NULL, FALSE, FALSE, NULL);
+#endif
+
     trace_qio_channel_socket_new(sioc);
 
     return sioc;
@@ -78,11 +82,11 @@ qio_channel_socket_set_fd(QIOChannelSocket *sioc,
 
     if (getpeername(fd, (struct sockaddr *)&sioc->remoteAddr,
                     &sioc->remoteAddrLen) < 0) {
-        if (socket_error() == ENOTCONN) {
+        if (errno == ENOTCONN) {
             memset(&sioc->remoteAddr, 0, sizeof(sioc->remoteAddr));
             sioc->remoteAddrLen = sizeof(sioc->remoteAddr);
         } else {
-            error_setg_errno(errp, socket_error(),
+            error_setg_errno(errp, errno,
                              "Unable to query remote socket address");
             goto error;
         }
@@ -90,7 +94,7 @@ qio_channel_socket_set_fd(QIOChannelSocket *sioc,
 
     if (getsockname(fd, (struct sockaddr *)&sioc->localAddr,
                     &sioc->localAddrLen) < 0) {
-        error_setg_errno(errp, socket_error(),
+        error_setg_errno(errp, errno,
                          "Unable to query local socket address");
         goto error;
     }
@@ -341,13 +345,18 @@ qio_channel_socket_accept(QIOChannelSocket *ioc,
     cioc->remoteAddrLen = sizeof(ioc->remoteAddr);
     cioc->localAddrLen = sizeof(ioc->localAddr);
 
+#ifdef WIN32
+    QIO_CHANNEL(cioc)->event = CreateEvent(NULL, FALSE, FALSE, NULL);
+#endif
+
+
  retry:
     trace_qio_channel_socket_accept(ioc);
-    cioc->fd = accept(ioc->fd, (struct sockaddr *)&cioc->remoteAddr,
-                      &cioc->remoteAddrLen);
+    cioc->fd = qemu_accept(ioc->fd, (struct sockaddr *)&cioc->remoteAddr,
+                           &cioc->remoteAddrLen);
     if (cioc->fd < 0) {
         trace_qio_channel_socket_accept_fail(ioc);
-        if (socket_error() == EINTR) {
+        if (errno == EINTR) {
             goto retry;
         }
         goto error;
@@ -355,7 +364,7 @@ qio_channel_socket_accept(QIOChannelSocket *ioc,
 
     if (getsockname(cioc->fd, (struct sockaddr *)&cioc->localAddr,
                     &cioc->localAddrLen) < 0) {
-        error_setg_errno(errp, socket_error(),
+        error_setg_errno(errp, errno,
                          "Unable to query local socket address");
         goto error;
     }
@@ -384,7 +393,10 @@ static void qio_channel_socket_finalize(Object *obj)
 {
     QIOChannelSocket *ioc = QIO_CHANNEL_SOCKET(obj);
     if (ioc->fd != -1) {
-        close(ioc->fd);
+#ifdef WIN32
+        WSAEventSelect(ioc->fd, NULL, 0);
+#endif
+        closesocket(ioc->fd);
         ioc->fd = -1;
     }
 }
@@ -466,15 +478,14 @@ static ssize_t qio_channel_socket_readv(QIOChannel *ioc,
  retry:
     ret = recvmsg(sioc->fd, &msg, sflags);
     if (ret < 0) {
-        if (socket_error() == EAGAIN ||
-            socket_error() == EWOULDBLOCK) {
+        if (errno == EAGAIN) {
             return QIO_CHANNEL_ERR_BLOCK;
         }
-        if (socket_error() == EINTR) {
+        if (errno == EINTR) {
             goto retry;
         }
 
-        error_setg_errno(errp, socket_error(),
+        error_setg_errno(errp, errno,
                          "Unable to read from socket");
         return -1;
     }
@@ -526,14 +537,13 @@ static ssize_t qio_channel_socket_writev(QIOChannel *ioc,
  retry:
     ret = sendmsg(sioc->fd, &msg, 0);
     if (ret <= 0) {
-        if (socket_error() == EAGAIN ||
-            socket_error() == EWOULDBLOCK) {
+        if (errno == EAGAIN) {
             return QIO_CHANNEL_ERR_BLOCK;
         }
-        if (socket_error() == EINTR) {
+        if (errno == EINTR) {
             goto retry;
         }
-        error_setg_errno(errp, socket_error(),
+        error_setg_errno(errp, errno,
                          "Unable to write to socket");
         return -1;
     }
@@ -559,17 +569,17 @@ static ssize_t qio_channel_socket_readv(QIOChannel *ioc,
                    iov[i].iov_len,
                    0);
         if (ret < 0) {
-            if (socket_error() == EAGAIN) {
+            if (errno == EAGAIN) {
                 if (done) {
                     return done;
                 } else {
                     return QIO_CHANNEL_ERR_BLOCK;
                 }
-            } else if (socket_error() == EINTR) {
+            } else if (errno == EINTR) {
                 goto retry;
             } else {
-                error_setg_errno(errp, socket_error(),
-                                 "Unable to write to socket");
+                error_setg_errno(errp, errno,
+                                 "Unable to read from socket");
                 return -1;
             }
         }
@@ -601,16 +611,16 @@ static ssize_t qio_channel_socket_writev(QIOChannel *ioc,
                    iov[i].iov_len,
                    0);
         if (ret < 0) {
-            if (socket_error() == EAGAIN) {
+            if (errno == EAGAIN) {
                 if (done) {
                     return done;
                 } else {
                     return QIO_CHANNEL_ERR_BLOCK;
                 }
-            } else if (socket_error() == EINTR) {
+            } else if (errno == EINTR) {
                 goto retry;
             } else {
-                error_setg_errno(errp, socket_error(),
+                error_setg_errno(errp, errno,
                                  "Unable to write to socket");
                 return -1;
             }
@@ -636,6 +646,11 @@ qio_channel_socket_set_blocking(QIOChannel *ioc,
         qemu_set_block(sioc->fd);
     } else {
         qemu_set_nonblock(sioc->fd);
+#ifdef WIN32
+        WSAEventSelect(sioc->fd, ioc->event,
+                       FD_READ | FD_ACCEPT | FD_CLOSE |
+                       FD_CONNECT | FD_WRITE | FD_OOB);
+#endif
     }
     return 0;
 }
@@ -671,13 +686,18 @@ qio_channel_socket_close(QIOChannel *ioc,
 {
     QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(ioc);
 
-    if (closesocket(sioc->fd) < 0) {
+    if (sioc->fd != -1) {
+#ifdef WIN32
+        WSAEventSelect(sioc->fd, NULL, 0);
+#endif
+        if (closesocket(sioc->fd) < 0) {
+            sioc->fd = -1;
+            error_setg_errno(errp, errno,
+                             "Unable to close socket");
+            return -1;
+        }
         sioc->fd = -1;
-        error_setg_errno(errp, socket_error(),
-                         "Unable to close socket");
-        return -1;
     }
-    sioc->fd = -1;
     return 0;
 }
 
@@ -703,7 +723,7 @@ qio_channel_socket_shutdown(QIOChannel *ioc,
     }
 
     if (shutdown(sioc->fd, sockhow) < 0) {
-        error_setg_errno(errp, socket_error(),
+        error_setg_errno(errp, errno,
                          "Unable to shutdown socket");
         return -1;
     }
@@ -714,9 +734,9 @@ static GSource *qio_channel_socket_create_watch(QIOChannel *ioc,
                                                 GIOCondition condition)
 {
     QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(ioc);
-    return qio_channel_create_fd_watch(ioc,
-                                       sioc->fd,
-                                       condition);
+    return qio_channel_create_socket_watch(ioc,
+                                           sioc->fd,
+                                           condition);
 }
 
 static void qio_channel_socket_class_init(ObjectClass *klass,
diff --git a/io/channel-watch.c b/io/channel-watch.c
index 931fa4d49d..cf1cdff896 100644
--- a/io/channel-watch.c
+++ b/io/channel-watch.c
@@ -30,6 +30,20 @@ struct QIOChannelFDSource {
 };
 
 
+#ifdef CONFIG_WIN32
+typedef struct QIOChannelSocketSource QIOChannelSocketSource;
+struct QIOChannelSocketSource {
+    GSource parent;
+    GPollFD fd;
+    QIOChannel *ioc;
+    SOCKET socket;
+    int revents;
+    GIOCondition condition;
+};
+
+#endif
+
+
 typedef struct QIOChannelFDPairSource QIOChannelFDPairSource;
 struct QIOChannelFDPairSource {
     GSource parent;
@@ -82,6 +96,97 @@ qio_channel_fd_source_finalize(GSource *source)
 }
 
 
+#ifdef CONFIG_WIN32
+static gboolean
+qio_channel_socket_source_prepare(GSource *source G_GNUC_UNUSED,
+                                  gint *timeout)
+{
+    *timeout = -1;
+
+    return FALSE;
+}
+
+
+/*
+ * NB, this impl only works when the socket is in non-blocking
+ * mode on Win32
+ */
+static gboolean
+qio_channel_socket_source_check(GSource *source)
+{
+    static struct timeval tv0;
+
+    QIOChannelSocketSource *ssource = (QIOChannelSocketSource *)source;
+    WSANETWORKEVENTS ev;
+    fd_set rfds, wfds, xfds;
+
+    if (!ssource->condition) {
+        return 0;
+    }
+
+    WSAEnumNetworkEvents(ssource->socket, ssource->ioc->event, &ev);
+
+    FD_ZERO(&rfds);
+    FD_ZERO(&wfds);
+    FD_ZERO(&xfds);
+    if (ssource->condition & G_IO_IN) {
+        FD_SET((SOCKET)ssource->socket, &rfds);
+    }
+    if (ssource->condition & G_IO_OUT) {
+        FD_SET((SOCKET)ssource->socket, &wfds);
+    }
+    if (ssource->condition & G_IO_PRI) {
+        FD_SET((SOCKET)ssource->socket, &xfds);
+    }
+    ssource->revents = 0;
+    if (select(0, &rfds, &wfds, &xfds, &tv0) == 0) {
+        return 0;
+    }
+
+    if (FD_ISSET(ssource->socket, &rfds)) {
+        ssource->revents |= G_IO_IN;
+    }
+    if (FD_ISSET(ssource->socket, &wfds)) {
+        ssource->revents |= G_IO_OUT;
+    }
+    if (FD_ISSET(ssource->socket, &xfds)) {
+        ssource->revents |= G_IO_PRI;
+    }
+
+    return ssource->revents;
+}
+
+
+static gboolean
+qio_channel_socket_source_dispatch(GSource *source,
+                                   GSourceFunc callback,
+                                   gpointer user_data)
+{
+    QIOChannelFunc func = (QIOChannelFunc)callback;
+    QIOChannelSocketSource *ssource = (QIOChannelSocketSource *)source;
+
+    return (*func)(ssource->ioc, ssource->revents, user_data);
+}
+
+
+static void
+qio_channel_socket_source_finalize(GSource *source)
+{
+    QIOChannelSocketSource *ssource = (QIOChannelSocketSource *)source;
+
+    object_unref(OBJECT(ssource->ioc));
+}
+
+
+GSourceFuncs qio_channel_socket_source_funcs = {
+    qio_channel_socket_source_prepare,
+    qio_channel_socket_source_check,
+    qio_channel_socket_source_dispatch,
+    qio_channel_socket_source_finalize
+};
+#endif
+
+
 static gboolean
 qio_channel_fd_pair_source_prepare(GSource *source G_GNUC_UNUSED,
                                    gint *timeout)
@@ -160,7 +265,11 @@ GSource *qio_channel_create_fd_watch(QIOChannel *ioc,
 
     ssource->condition = condition;
 
+#ifdef CONFIG_WIN32
+    ssource->fd.fd = (gint64)_get_osfhandle(fd);
+#else
     ssource->fd.fd = fd;
+#endif
     ssource->fd.events = condition;
 
     g_source_add_poll(source, &ssource->fd);
@@ -168,6 +277,40 @@ GSource *qio_channel_create_fd_watch(QIOChannel *ioc,
     return source;
 }
 
+#ifdef CONFIG_WIN32
+GSource *qio_channel_create_socket_watch(QIOChannel *ioc,
+                                         int socket,
+                                         GIOCondition condition)
+{
+    GSource *source;
+    QIOChannelSocketSource *ssource;
+
+    source = g_source_new(&qio_channel_socket_source_funcs,
+                          sizeof(QIOChannelSocketSource));
+    ssource = (QIOChannelSocketSource *)source;
+
+    ssource->ioc = ioc;
+    object_ref(OBJECT(ioc));
+
+    ssource->condition = condition;
+    ssource->socket = socket;
+    ssource->revents = 0;
+
+    ssource->fd.fd = (gintptr)ioc->event;
+    ssource->fd.events = G_IO_IN;
+
+    g_source_add_poll(source, &ssource->fd);
+
+    return source;
+}
+#else
+GSource *qio_channel_create_socket_watch(QIOChannel *ioc,
+                                         int socket,
+                                         GIOCondition condition)
+{
+    return qio_channel_create_fd_watch(ioc, socket, condition);
+}
+#endif
 
 GSource *qio_channel_create_fd_pair_watch(QIOChannel *ioc,
                                           int fdread,
@@ -186,10 +329,15 @@ GSource *qio_channel_create_fd_pair_watch(QIOChannel *ioc,
 
     ssource->condition = condition;
 
+#ifdef CONFIG_WIN32
+    ssource->fdread.fd = (gint64)_get_osfhandle(fdread);
+    ssource->fdwrite.fd = (gint64)_get_osfhandle(fdwrite);
+#else
     ssource->fdread.fd = fdread;
-    ssource->fdread.events = condition & G_IO_IN;
-
     ssource->fdwrite.fd = fdwrite;
+#endif
+
+    ssource->fdread.events = condition & G_IO_IN;
     ssource->fdwrite.events = condition & G_IO_OUT;
 
     g_source_add_poll(source, &ssource->fdread);
diff --git a/io/channel.c b/io/channel.c
index 3fc09f887c..dd6fc0eb28 100644
--- a/io/channel.c
+++ b/io/channel.c
@@ -274,10 +274,24 @@ void qio_channel_wait(QIOChannel *ioc,
 }
 
 
+#ifdef _WIN32
+static void qio_channel_finalize(Object *obj)
+{
+    QIOChannel *ioc = QIO_CHANNEL(obj);
+
+    if (ioc->event) {
+        CloseHandle(ioc->event);
+    }
+}
+#endif
+
 static const TypeInfo qio_channel_info = {
     .parent = TYPE_OBJECT,
     .name = TYPE_QIO_CHANNEL,
     .instance_size = sizeof(QIOChannel),
+#ifdef _WIN32
+    .instance_finalize = qio_channel_finalize,
+#endif
     .abstract = true,
     .class_size = sizeof(QIOChannelClass),
 };
diff --git a/linux-user/flatload.c b/linux-user/flatload.c
index a25c797b73..f9139c399a 100644
--- a/linux-user/flatload.c
+++ b/linux-user/flatload.c
@@ -38,7 +38,6 @@
 
 #include "qemu.h"
 #include "flat.h"
-#define ntohl(x) be32_to_cpu(x)
 #include <target_flat.h>
 
 //#define DEBUG
diff --git a/migration/migration.c b/migration/migration.c
index 7d13377b8e..034a918d32 100644
--- a/migration/migration.c
+++ b/migration/migration.c
@@ -706,7 +706,7 @@ void qmp_migrate_set_capabilities(MigrationCapabilityStatusList *params,
              */
             error_report("Postcopy is not currently compatible with "
                          "compression");
-            s->enabled_capabilities[MIGRATION_CAPABILITY_X_POSTCOPY_RAM] =
+            s->enabled_capabilities[MIGRATION_CAPABILITY_POSTCOPY_RAM] =
                 false;
         }
     }
@@ -1125,7 +1125,7 @@ bool migrate_postcopy_ram(void)
 
     s = migrate_get_current();
 
-    return s->enabled_capabilities[MIGRATION_CAPABILITY_X_POSTCOPY_RAM];
+    return s->enabled_capabilities[MIGRATION_CAPABILITY_POSTCOPY_RAM];
 }
 
 bool migrate_auto_converge(void)
@@ -1269,8 +1269,7 @@ static void *source_return_path_thread(void *opaque)
     MigrationState *ms = opaque;
     QEMUFile *rp = ms->rp_state.from_dst_file;
     uint16_t header_len, header_type;
-    const int max_len = 512;
-    uint8_t buf[max_len];
+    uint8_t buf[512];
     uint32_t tmp32, sibling_error;
     ram_addr_t start = 0; /* =0 to silence warning */
     size_t  len = 0, expected_len;
@@ -1293,7 +1292,7 @@ static void *source_return_path_thread(void *opaque)
 
         if ((rp_cmd_args[header_type].len != -1 &&
             header_len != rp_cmd_args[header_type].len) ||
-            header_len > max_len) {
+            header_len > sizeof(buf)) {
             error_report("RP: Received '%s' message (0x%04x) with"
                     "incorrect length %d expecting %zu",
                     rp_cmd_args[header_type].name, header_type, header_len,
diff --git a/migration/qemu-file-unix.c b/migration/qemu-file-unix.c
index 61b059b25b..4474e18ff8 100644
--- a/migration/qemu-file-unix.c
+++ b/migration/qemu-file-unix.c
@@ -53,18 +53,16 @@ static ssize_t socket_writev_buffer(void *opaque, struct iovec *iov, int iovcnt,
         }
 
         if (size > 0) {
-            err = socket_error();
-
-            if (err != EAGAIN && err != EWOULDBLOCK) {
+            if (errno != EAGAIN && errno != EWOULDBLOCK) {
                 error_report("socket_writev_buffer: Got err=%d for (%zu/%zu)",
-                             err, (size_t)size, (size_t)len);
+                             errno, (size_t)size, (size_t)len);
                 /*
                  * If I've already sent some but only just got the error, I
                  * could return the amount validly sent so far and wait for the
                  * next call to report the error, but I'd rather flag the error
                  * immediately.
                  */
-                return -err;
+                return -errno;
             }
 
             /* Emulate blocking */
@@ -99,15 +97,15 @@ static ssize_t socket_get_buffer(void *opaque, uint8_t *buf, int64_t pos,
         if (len != -1) {
             break;
         }
-        if (socket_error() == EAGAIN) {
+        if (errno == EAGAIN) {
             yield_until_fd_readable(s->fd);
-        } else if (socket_error() != EINTR) {
+        } else if (errno != EINTR) {
             break;
         }
     }
 
     if (len == -1) {
-        len = -socket_error();
+        len = -errno;
     }
     return len;
 }
diff --git a/migration/savevm.c b/migration/savevm.c
index 96e7db5967..0a33c227c5 100644
--- a/migration/savevm.c
+++ b/migration/savevm.c
@@ -1494,17 +1494,22 @@ static int loadvm_postcopy_handle_listen(MigrationIncomingState *mis)
     qemu_sem_init(&mis->listen_thread_sem, 0);
     qemu_thread_create(&mis->listen_thread, "postcopy/listen",
                        postcopy_ram_listen_thread, mis->from_src_file,
-                       QEMU_THREAD_JOINABLE);
+                       QEMU_THREAD_DETACHED);
     qemu_sem_wait(&mis->listen_thread_sem);
     qemu_sem_destroy(&mis->listen_thread_sem);
 
     return 0;
 }
 
+
+typedef struct {
+    QEMUBH *bh;
+} HandleRunBhData;
+
 static void loadvm_postcopy_handle_run_bh(void *opaque)
 {
     Error *local_err = NULL;
-    MigrationIncomingState *mis = opaque;
+    HandleRunBhData *data = opaque;
 
     /* TODO we should move all of this lot into postcopy_ram.c or a shared code
      * in migration.c
@@ -1532,13 +1537,15 @@ static void loadvm_postcopy_handle_run_bh(void *opaque)
         runstate_set(RUN_STATE_PAUSED);
     }
 
-    qemu_bh_delete(mis->bh);
+    qemu_bh_delete(data->bh);
+    g_free(data);
 }
 
 /* After all discards we can start running and asking for pages */
 static int loadvm_postcopy_handle_run(MigrationIncomingState *mis)
 {
     PostcopyState ps = postcopy_state_set(POSTCOPY_INCOMING_RUNNING);
+    HandleRunBhData *data;
 
     trace_loadvm_postcopy_handle_run();
     if (ps != POSTCOPY_INCOMING_LISTENING) {
@@ -1546,8 +1553,9 @@ static int loadvm_postcopy_handle_run(MigrationIncomingState *mis)
         return -1;
     }
 
-    mis->bh = qemu_bh_new(loadvm_postcopy_handle_run_bh, NULL);
-    qemu_bh_schedule(mis->bh);
+    data = g_new(HandleRunBhData, 1);
+    data->bh = qemu_bh_new(loadvm_postcopy_handle_run_bh, data);
+    qemu_bh_schedule(data->bh);
 
     /* We need to finish reading the stream from the package
      * and also stop reading anything more from the stream that loaded the
diff --git a/migration/tcp.c b/migration/tcp.c
index e888a4e490..e1fa7f8f18 100644
--- a/migration/tcp.c
+++ b/migration/tcp.c
@@ -59,12 +59,11 @@ static void tcp_accept_incoming_migration(void *opaque)
     socklen_t addrlen = sizeof(addr);
     int s = (intptr_t)opaque;
     QEMUFile *f;
-    int c, err;
+    int c;
 
     do {
         c = qemu_accept(s, (struct sockaddr *)&addr, &addrlen);
-        err = socket_error();
-    } while (c < 0 && err == EINTR);
+    } while (c < 0 && errno == EINTR);
     qemu_set_fd_handler(s, NULL, NULL, NULL);
     closesocket(s);
 
@@ -72,7 +71,7 @@ static void tcp_accept_incoming_migration(void *opaque)
 
     if (c < 0) {
         error_report("could not accept migration connection (%s)",
-                     strerror(err));
+                     strerror(errno));
         return;
     }
 
diff --git a/net/socket.c b/net/socket.c
index e32e3cb996..73dc49a3a4 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -145,15 +145,14 @@ static void net_socket_send_completed(NetClientState *nc, ssize_t len)
 static void net_socket_send(void *opaque)
 {
     NetSocketState *s = opaque;
-    int size, err;
+    int size;
     unsigned l;
     uint8_t buf1[NET_BUFSIZE];
     const uint8_t *buf;
 
     size = qemu_recv(s->fd, buf1, sizeof(buf1), 0);
     if (size < 0) {
-        err = socket_error();
-        if (err != EWOULDBLOCK)
+        if (errno != EWOULDBLOCK)
             goto eoc;
     } else if (size == 0) {
         /* end of connection */
@@ -566,7 +565,7 @@ static int net_socket_connect_init(NetClientState *peer,
                                    const char *host_str)
 {
     NetSocketState *s;
-    int fd, connected, ret, err;
+    int fd, connected, ret;
     struct sockaddr_in saddr;
 
     if (parse_host_port(&saddr, host_str) < 0)
@@ -583,14 +582,12 @@ static int net_socket_connect_init(NetClientState *peer,
     for(;;) {
         ret = connect(fd, (struct sockaddr *)&saddr, sizeof(saddr));
         if (ret < 0) {
-            err = socket_error();
-            if (err == EINTR || err == EWOULDBLOCK) {
-            } else if (err == EINPROGRESS) {
-                break;
-#ifdef _WIN32
-            } else if (err == WSAEALREADY || err == WSAEINVAL) {
+            if (errno == EINTR || errno == EWOULDBLOCK) {
+                /* continue */
+            } else if (errno == EINPROGRESS ||
+                       errno == EALREADY ||
+                       errno == EINVAL) {
                 break;
-#endif
             } else {
                 perror("connect");
                 closesocket(fd);
diff --git a/pc-bios/s390-ccw/bootmap.c b/pc-bios/s390-ccw/bootmap.c
index 415508b279..492530275d 100644
--- a/pc-bios/s390-ccw/bootmap.c
+++ b/pc-bios/s390-ccw/bootmap.c
@@ -424,7 +424,7 @@ static void ipl_scsi(void)
     IPL_assert(magic_match(sec, ZIPL_MAGIC), "No zIPL magic");
 
     ns_end = sec + virtio_get_block_size();
-    for (ns = (sec + pte_len); (ns + pte_len) < ns_end; ns++) {
+    for (ns = (sec + pte_len); (ns + pte_len) < ns_end; ns += pte_len) {
         prog_table_entry = (ScsiBlockPtr *)ns;
         if (!prog_table_entry->blockno) {
             break;
diff --git a/qapi-schema.json b/qapi-schema.json
index 362c9d816a..6269c370e7 100644
--- a/qapi-schema.json
+++ b/qapi-schema.json
@@ -540,15 +540,15 @@
 # @auto-converge: If enabled, QEMU will automatically throttle down the guest
 #          to speed up convergence of RAM migration. (since 1.6)
 #
-# @x-postcopy-ram: Start executing on the migration target before all of RAM has
+# @postcopy-ram: Start executing on the migration target before all of RAM has
 #          been migrated, pulling the remaining pages along as needed. NOTE: If
-#          the migration fails during postcopy the VM will fail.  (since 2.5)
+#          the migration fails during postcopy the VM will fail.  (since 2.6)
 #
 # Since: 1.2
 ##
 { 'enum': 'MigrationCapability',
   'data': ['xbzrle', 'rdma-pin-all', 'auto-converge', 'zero-blocks',
-           'compress', 'events', 'x-postcopy-ram'] }
+           'compress', 'events', 'postcopy-ram'] }
 
 ##
 # @MigrationCapabilityStatus
@@ -705,7 +705,7 @@
 # @migrate-start-postcopy
 #
 # Followup to a migration command to switch the migration to postcopy mode.
-# The x-postcopy-ram capability must be set before the original migration
+# The postcopy-ram capability must be set before the original migration
 # command.
 #
 # Since: 2.5
diff --git a/qemu-char.c b/qemu-char.c
index e0147f3e8b..3bf30b5564 100644
--- a/qemu-char.c
+++ b/qemu-char.c
@@ -3091,20 +3091,6 @@ static void tcp_chr_close(CharDriverState *chr)
     qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
 }
 
-static void qemu_chr_finish_socket_connection(CharDriverState *chr,
-                                              QIOChannelSocket *sioc)
-{
-    TCPCharDriver *s = chr->opaque;
-
-    if (s->is_listen) {
-        s->listen_ioc = sioc;
-        s->listen_tag = qio_channel_add_watch(
-            QIO_CHANNEL(s->listen_ioc), G_IO_IN, tcp_chr_accept, chr, NULL);
-    } else {
-        tcp_chr_new_client(chr, sioc);
-        object_unref(OBJECT(sioc));
-    }
-}
 
 static void qemu_chr_socket_connected(Object *src, Error *err, void *opaque)
 {
@@ -3119,37 +3105,11 @@ static void qemu_chr_socket_connected(Object *src, Error *err, void *opaque)
     }
 
     s->connect_err_reported = false;
-    qemu_chr_finish_socket_connection(chr, sioc);
-}
-
-static bool qemu_chr_open_socket_fd(CharDriverState *chr, Error **errp)
-{
-    TCPCharDriver *s = chr->opaque;
-    QIOChannelSocket *sioc = qio_channel_socket_new();
-
-    if (s->is_listen) {
-        if (qio_channel_socket_listen_sync(sioc, s->addr, errp) < 0) {
-            goto fail;
-        }
-        qemu_chr_finish_socket_connection(chr, sioc);
-    } else if (s->reconnect_time) {
-        qio_channel_socket_connect_async(sioc, s->addr,
-                                         qemu_chr_socket_connected,
-                                         chr, NULL);
-    } else {
-        if (qio_channel_socket_connect_sync(sioc, s->addr, errp) < 0) {
-            goto fail;
-        }
-        qemu_chr_finish_socket_connection(chr, sioc);
-    }
-
-    return true;
-
- fail:
+    tcp_chr_new_client(chr, sioc);
     object_unref(OBJECT(sioc));
-    return false;
 }
 
+
 /*********************************************************/
 /* Ring buffer chardev */
 
@@ -4258,19 +4218,11 @@ static CharDriverState *qmp_chardev_open_parallel(const char *id,
 
 #endif /* WIN32 */
 
-static void socket_try_connect(CharDriverState *chr)
-{
-    Error *err = NULL;
-
-    if (!qemu_chr_open_socket_fd(chr, &err)) {
-        check_report_connect_error(chr, err);
-    }
-}
-
 static gboolean socket_reconnect_timeout(gpointer opaque)
 {
     CharDriverState *chr = opaque;
     TCPCharDriver *s = chr->opaque;
+    QIOChannelSocket *sioc;
 
     s->reconnect_timer = 0;
 
@@ -4278,7 +4230,10 @@ static gboolean socket_reconnect_timeout(gpointer opaque)
         return false;
     }
 
-    socket_try_connect(chr);
+    sioc = qio_channel_socket_new();
+    qio_channel_socket_connect_async(sioc, s->addr,
+                                     qemu_chr_socket_connected,
+                                     chr, NULL);
 
     return false;
 }
@@ -4298,6 +4253,7 @@ static CharDriverState *qmp_chardev_open_socket(const char *id,
     bool is_waitconnect = sock->has_wait    ? sock->wait    : false;
     int64_t reconnect   = sock->has_reconnect ? sock->reconnect : 0;
     ChardevCommon *common = qapi_ChardevSocket_base(sock);
+    QIOChannelSocket *sioc = NULL;
 
     chr = qemu_chr_alloc(common, errp);
     if (!chr) {
@@ -4367,22 +4323,40 @@ static CharDriverState *qmp_chardev_open_socket(const char *id,
         s->reconnect_time = reconnect;
     }
 
+    sioc = qio_channel_socket_new();
     if (s->reconnect_time) {
-        socket_try_connect(chr);
-    } else if (!qemu_chr_open_socket_fd(chr, errp)) {
-        goto error;
-    }
-
-    if (is_listen && is_waitconnect) {
-        fprintf(stderr, "QEMU waiting for connection on: %s\n",
-                chr->filename);
-        tcp_chr_accept(QIO_CHANNEL(s->listen_ioc), G_IO_IN, chr);
+        qio_channel_socket_connect_async(sioc, s->addr,
+                                         qemu_chr_socket_connected,
+                                         chr, NULL);
+    } else if (s->is_listen) {
+        if (qio_channel_socket_listen_sync(sioc, s->addr, errp) < 0) {
+            goto error;
+        }
+        s->listen_ioc = sioc;
+        if (is_waitconnect) {
+            fprintf(stderr, "QEMU waiting for connection on: %s\n",
+                    chr->filename);
+            tcp_chr_accept(QIO_CHANNEL(s->listen_ioc), G_IO_IN, chr);
+        }
         qio_channel_set_blocking(QIO_CHANNEL(s->listen_ioc), false, NULL);
+        if (!s->ioc) {
+            s->listen_tag = qio_channel_add_watch(
+                QIO_CHANNEL(s->listen_ioc), G_IO_IN, tcp_chr_accept, chr, NULL);
+        }
+    } else {
+        if (qio_channel_socket_connect_sync(sioc, s->addr, errp) < 0) {
+            goto error;
+        }
+        tcp_chr_new_client(chr, sioc);
+        object_unref(OBJECT(sioc));
     }
 
     return chr;
 
  error:
+    if (sioc) {
+        object_unref(OBJECT(sioc));
+    }
     if (s->tls_creds) {
         object_unref(OBJECT(s->tls_creds));
     }
diff --git a/qmp-commands.hx b/qmp-commands.hx
index b629673459..9e05365ccf 100644
--- a/qmp-commands.hx
+++ b/qmp-commands.hx
@@ -3683,7 +3683,7 @@ Enable/Disable migration capabilities
 - "zero-blocks": compress zero blocks during block migration
 - "compress": use multiple compression threads to accelerate live migration
 - "events": generate events for each migration state change
-- "x-postcopy-ram": postcopy mode for live migration
+- "postcopy-ram": postcopy mode for live migration
 
 Arguments:
 
@@ -3713,7 +3713,7 @@ Query current migration capabilities
          - "zero-blocks" : Zero Blocks state (json-bool)
          - "compress": Multiple compression threads state (json-bool)
          - "events": Migration state change event state (json-bool)
-         - "x-postcopy-ram": postcopy ram state (json-bool)
+         - "postcopy-ram": postcopy ram state (json-bool)
 
 Arguments:
 
@@ -3727,7 +3727,7 @@ Example:
      {"state": false, "capability": "zero-blocks"},
      {"state": false, "capability": "compress"},
      {"state": true, "capability": "events"},
-     {"state": false, "capability": "x-postcopy-ram"}
+     {"state": false, "capability": "postcopy-ram"}
    ]}
 
 EQMP
diff --git a/slirp/slirp.h b/slirp/slirp.h
index 07c13b4725..a6741e77b1 100644
--- a/slirp/slirp.h
+++ b/slirp/slirp.h
@@ -14,8 +14,6 @@ typedef char *caddr_t;
 # include <iphlpapi.h>
 
 #else
-# define ioctlsocket ioctl
-# define closesocket(s) close(s)
 # if !defined(__HAIKU__)
 #  define O_BINARY 0
 # endif
diff --git a/slirp/tcp_input.c b/slirp/tcp_input.c
index 2027a7511d..03be56eaab 100644
--- a/slirp/tcp_input.c
+++ b/slirp/tcp_input.c
@@ -586,11 +586,7 @@ findso:
 	  }
 
 	  if ((tcp_fconnect(so, so->so_ffamily) == -1) &&
-#if defined(_WIN32)
-              socket_error() != WSAEWOULDBLOCK
-#else
               (errno != EINPROGRESS) && (errno != EWOULDBLOCK)
-#endif
           ) {
 	    u_char code=ICMP_UNREACH_NET;
 	    DEBUG_MISC((dfd, " tcp fconnect errno = %d-%s\n",
diff --git a/target-s390x/cpu-qom.h b/target-s390x/cpu-qom.h
index 029a44af24..1c90933965 100644
--- a/target-s390x/cpu-qom.h
+++ b/target-s390x/cpu-qom.h
@@ -47,6 +47,8 @@ typedef struct S390CPUClass {
     CPUClass parent_class;
     /*< public >*/
 
+    int64_t next_cpu_id;
+
     DeviceRealize parent_realize;
     void (*parent_reset)(CPUState *cpu);
     void (*load_normal)(CPUState *cpu);
@@ -66,6 +68,7 @@ typedef struct S390CPU {
     /*< public >*/
 
     CPUS390XState env;
+    int64_t id;
     /* needed for live migration */
     void *irqstate;
     uint32_t irqstate_saved_size;
diff --git a/target-s390x/cpu.c b/target-s390x/cpu.c
index 73a910d2fa..1cbf70355d 100644
--- a/target-s390x/cpu.c
+++ b/target-s390x/cpu.c
@@ -30,8 +30,11 @@
 #include "qemu/error-report.h"
 #include "hw/hw.h"
 #include "trace.h"
+#include "qapi/visitor.h"
 #ifndef CONFIG_USER_ONLY
 #include "sysemu/arch_init.h"
+#include "sysemu/sysemu.h"
+#include "hw/s390x/sclp.h"
 #endif
 
 #define CR0_RESET       0xE0UL
@@ -195,7 +198,39 @@ static void s390_cpu_realizefn(DeviceState *dev, Error **errp)
 {
     CPUState *cs = CPU(dev);
     S390CPUClass *scc = S390_CPU_GET_CLASS(dev);
+    S390CPU *cpu = S390_CPU(dev);
+    CPUS390XState *env = &cpu->env;
+    Error *err = NULL;
+
+#if !defined(CONFIG_USER_ONLY)
+    if (cpu->id >= max_cpus) {
+        error_setg(&err, "Unable to add CPU: %" PRIi64
+                   ", max allowed: %d", cpu->id, max_cpus - 1);
+        goto out;
+    }
+#endif
+    if (cpu_exists(cpu->id)) {
+        error_setg(&err, "Unable to add CPU: %" PRIi64
+                   ", it already exists", cpu->id);
+        goto out;
+    }
+    if (cpu->id != scc->next_cpu_id) {
+        error_setg(&err, "Unable to add CPU: %" PRIi64
+                   ", The next available id is %" PRIi64, cpu->id,
+                   scc->next_cpu_id);
+        goto out;
+    }
+
+    cpu_exec_init(cs, &err);
+    if (err != NULL) {
+        goto out;
+    }
+    scc->next_cpu_id++;
 
+#if !defined(CONFIG_USER_ONLY)
+    qemu_register_reset(s390_cpu_machine_reset_cb, cpu);
+#endif
+    env->cpu_num = cpu->id;
     s390_cpu_gdb_init(cs);
     qemu_init_vcpu(cs);
 #if !defined(CONFIG_USER_ONLY)
@@ -204,7 +239,55 @@ static void s390_cpu_realizefn(DeviceState *dev, Error **errp)
     cpu_reset(cs);
 #endif
 
-    scc->parent_realize(dev, errp);
+    scc->parent_realize(dev, &err);
+
+#if !defined(CONFIG_USER_ONLY)
+    if (dev->hotplugged) {
+        raise_irq_cpu_hotplug();
+    }
+#endif
+
+out:
+    error_propagate(errp, err);
+}
+
+static void s390x_cpu_get_id(Object *obj, Visitor *v, const char *name,
+                             void *opaque, Error **errp)
+{
+    S390CPU *cpu = S390_CPU(obj);
+    int64_t value = cpu->id;
+
+    visit_type_int(v, name, &value, errp);
+}
+
+static void s390x_cpu_set_id(Object *obj, Visitor *v, const char *name,
+                             void *opaque, Error **errp)
+{
+    S390CPU *cpu = S390_CPU(obj);
+    DeviceState *dev = DEVICE(obj);
+    const int64_t min = 0;
+    const int64_t max = UINT32_MAX;
+    Error *err = NULL;
+    int64_t value;
+
+    if (dev->realized) {
+        error_setg(errp, "Attempt to set property '%s' on '%s' after "
+                   "it was realized", name, object_get_typename(obj));
+        return;
+    }
+
+    visit_type_int(v, name, &value, &err);
+    if (err) {
+        error_propagate(errp, err);
+        return;
+    }
+    if (value < min || value > max) {
+        error_setg(errp, "Property %s.%s doesn't take value %" PRId64
+                   " (minimum: %" PRId64 ", maximum: %" PRId64 ")" ,
+                   object_get_typename(obj), name, value, min, max);
+        return;
+    }
+    cpu->id = value;
 }
 
 static void s390_cpu_initfn(Object *obj)
@@ -213,15 +296,16 @@ static void s390_cpu_initfn(Object *obj)
     S390CPU *cpu = S390_CPU(obj);
     CPUS390XState *env = &cpu->env;
     static bool inited;
-    static int cpu_num = 0;
 #if !defined(CONFIG_USER_ONLY)
     struct tm tm;
 #endif
 
     cs->env_ptr = env;
-    cpu_exec_init(cs, &error_abort);
+    cs->halted = 1;
+    cs->exception_index = EXCP_HLT;
+    object_property_add(OBJECT(cpu), "id", "int64_t", s390x_cpu_get_id,
+                        s390x_cpu_set_id, NULL, NULL, NULL);
 #if !defined(CONFIG_USER_ONLY)
-    qemu_register_reset(s390_cpu_machine_reset_cb, cpu);
     qemu_get_timedate(&tm, 0);
     env->tod_offset = TOD_UNIX_EPOCH +
                       (time2tod(mktimegm(&tm)) * 1000000000ULL);
@@ -230,7 +314,6 @@ static void s390_cpu_initfn(Object *obj)
     env->cpu_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, s390x_cpu_timer, cpu);
     s390_cpu_set_state(CPU_STATE_STOPPED, cpu);
 #endif
-    env->cpu_num = cpu_num++;
 
     if (tcg_enabled() && !inited) {
         inited = true;
@@ -337,6 +420,7 @@ static void s390_cpu_class_init(ObjectClass *oc, void *data)
     CPUClass *cc = CPU_CLASS(scc);
     DeviceClass *dc = DEVICE_CLASS(oc);
 
+    scc->next_cpu_id = 0;
     scc->parent_realize = dc->realize;
     dc->realize = s390_cpu_realizefn;
 
@@ -369,7 +453,7 @@ static void s390_cpu_class_init(ObjectClass *oc, void *data)
     cc->gdb_arch_name = s390_gdb_arch_name;
 
     /*
-     * Reason: s390_cpu_initfn() calls cpu_exec_init(), which saves
+     * Reason: s390_cpu_realizefn() calls cpu_exec_init(), which saves
      * the object in cpus -> dangling pointer after final
      * object_unref().
      */
diff --git a/target-s390x/cpu.h b/target-s390x/cpu.h
index 49c84155be..6d97c089a4 100644
--- a/target-s390x/cpu.h
+++ b/target-s390x/cpu.h
@@ -413,6 +413,8 @@ void trigger_pgm_exception(CPUS390XState *env, uint32_t code, uint32_t ilen);
 #endif
 
 S390CPU *cpu_s390x_init(const char *cpu_model);
+S390CPU *s390x_new_cpu(const char *cpu_model, int64_t id, Error **errp);
+S390CPU *cpu_s390x_create(const char *cpu_model, Error **errp);
 void s390x_translate_init(void);
 int cpu_s390x_exec(CPUState *cpu);
 
diff --git a/target-s390x/helper.c b/target-s390x/helper.c
index 838bdd9e9e..76d5fbebe8 100644
--- a/target-s390x/helper.c
+++ b/target-s390x/helper.c
@@ -65,14 +65,51 @@ void s390x_cpu_timer(void *opaque)
 }
 #endif
 
-S390CPU *cpu_s390x_init(const char *cpu_model)
+S390CPU *cpu_s390x_create(const char *cpu_model, Error **errp)
 {
     S390CPU *cpu;
 
     cpu = S390_CPU(object_new(TYPE_S390_CPU));
 
-    object_property_set_bool(OBJECT(cpu), true, "realized", NULL);
+    return cpu;
+}
+
+S390CPU *s390x_new_cpu(const char *cpu_model, int64_t id, Error **errp)
+{
+    S390CPU *cpu;
+    Error *err = NULL;
+
+    cpu = cpu_s390x_create(cpu_model, &err);
+    if (err != NULL) {
+        goto out;
+    }
+
+    object_property_set_int(OBJECT(cpu), id, "id", &err);
+    if (err != NULL) {
+        goto out;
+    }
+    object_property_set_bool(OBJECT(cpu), true, "realized", &err);
 
+out:
+    if (err) {
+        error_propagate(errp, err);
+        object_unref(OBJECT(cpu));
+        cpu = NULL;
+    }
+    return cpu;
+}
+
+S390CPU *cpu_s390x_init(const char *cpu_model)
+{
+    Error *err = NULL;
+    S390CPU *cpu;
+    /* Use to track CPU ID for linux-user only */
+    static int64_t next_cpu_id;
+
+    cpu = s390x_new_cpu(cpu_model, next_cpu_id++, &err);
+    if (err) {
+        error_report_err(err);
+    }
     return cpu;
 }
 
diff --git a/tests/io-channel-helpers.c b/tests/io-channel-helpers.c
index 844066904b..a4dedbe0ad 100644
--- a/tests/io-channel-helpers.c
+++ b/tests/io-channel-helpers.c
@@ -132,7 +132,7 @@ static gpointer test_io_thread_reader(gpointer opaque)
 
         if (ret == QIO_CHANNEL_ERR_BLOCK) {
             if (data->blocking) {
-                error_setg(&data->writeerr,
+                error_setg(&data->readerr,
                            "Unexpected I/O blocking");
                 break;
             } else {
@@ -233,11 +233,11 @@ void qio_channel_test_run_reader(QIOChannelTest *test,
 
 void qio_channel_test_validate(QIOChannelTest *test)
 {
+    g_assert(test->readerr == NULL);
+    g_assert(test->writeerr == NULL);
     g_assert_cmpint(memcmp(test->input,
                            test->output,
                            test->len), ==, 0);
-    g_assert(test->readerr == NULL);
-    g_assert(test->writeerr == NULL);
 
     g_free(test->inputv);
     g_free(test->outputv);
diff --git a/tests/test-io-channel-socket.c b/tests/test-io-channel-socket.c
index 8a34056670..ae665f5ea0 100644
--- a/tests/test-io-channel-socket.c
+++ b/tests/test-io-channel-socket.c
@@ -22,66 +22,49 @@
 #include "io/channel-socket.h"
 #include "io/channel-util.h"
 #include "io-channel-helpers.h"
-#ifdef HAVE_IFADDRS_H
-#include <ifaddrs.h>
-#endif
 
-static int check_protocol_support(bool *has_ipv4, bool *has_ipv6)
+static int check_bind(struct sockaddr *sa, socklen_t salen, bool *has_proto)
 {
-#ifdef HAVE_IFADDRS_H
-    struct ifaddrs *ifaddr = NULL, *ifa;
-    struct addrinfo hints = { 0 };
-    struct addrinfo *ai = NULL;
-    int gaierr;
-
-    *has_ipv4 = *has_ipv6 = false;
+    int fd;
 
-    if (getifaddrs(&ifaddr) < 0) {
-        g_printerr("Failed to lookup interface addresses: %s\n",
-                   strerror(errno));
+    fd = socket(sa->sa_family, SOCK_STREAM, 0);
+    if (fd < 0) {
         return -1;
     }
 
-    for (ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next) {
-        if (!ifa->ifa_addr) {
-            continue;
-        }
-
-        if (ifa->ifa_addr->sa_family == AF_INET) {
-            *has_ipv4 = true;
-        }
-        if (ifa->ifa_addr->sa_family == AF_INET6) {
-            *has_ipv6 = true;
+    if (bind(fd, sa, salen) < 0) {
+        close(fd);
+        if (errno == EADDRNOTAVAIL) {
+            *has_proto = false;
+            return 0;
         }
+        return -1;
     }
 
-    freeifaddrs(ifaddr);
-
-    hints.ai_flags = AI_PASSIVE | AI_ADDRCONFIG;
-    hints.ai_family = AF_INET6;
-    hints.ai_socktype = SOCK_STREAM;
-
-    gaierr = getaddrinfo("::1", NULL, &hints, &ai);
-    if (gaierr != 0) {
-        if (gaierr == EAI_ADDRFAMILY ||
-            gaierr == EAI_FAMILY ||
-            gaierr == EAI_NONAME) {
-            *has_ipv6 = false;
-        } else {
-            g_printerr("Failed to resolve ::1 address: %s\n",
-                       gai_strerror(gaierr));
-            return -1;
-        }
-    }
+    close(fd);
+    *has_proto = true;
+    return 0;
+}
 
-    freeaddrinfo(ai);
+static int check_protocol_support(bool *has_ipv4, bool *has_ipv6)
+{
+    struct sockaddr_in sin = {
+        .sin_family = AF_INET,
+        .sin_addr = { .s_addr = htonl(INADDR_LOOPBACK) },
+    };
+    struct sockaddr_in6 sin6 = {
+        .sin6_family = AF_INET6,
+        .sin6_addr = IN6ADDR_LOOPBACK_INIT,
+    };
 
-    return 0;
-#else
-    *has_ipv4 = *has_ipv6 = false;
+    if (check_bind((struct sockaddr *)&sin, sizeof(sin), has_ipv4) < 0) {
+        return -1;
+    }
+    if (check_bind((struct sockaddr *)&sin6, sizeof(sin6), has_ipv6) < 0) {
+        return -1;
+    }
 
-    return -1;
-#endif
+    return 0;
 }
 
 
@@ -131,6 +114,7 @@ static void test_io_channel_setup_sync(SocketAddress *listen_addr,
         QIO_CHANNEL_SOCKET(*src), connect_addr, &error_abort);
     qio_channel_set_delay(*src, false);
 
+    qio_channel_wait(QIO_CHANNEL(lioc), G_IO_IN);
     *dst = QIO_CHANNEL(qio_channel_socket_accept(lioc, &error_abort));
     g_assert(*dst);
 
@@ -198,6 +182,7 @@ static void test_io_channel_setup_async(SocketAddress *listen_addr,
 
     g_assert(!data.err);
 
+    qio_channel_wait(QIO_CHANNEL(lioc), G_IO_IN);
     *dst = QIO_CHANNEL(qio_channel_socket_accept(lioc, &error_abort));
     g_assert(*dst);
 
@@ -487,10 +472,20 @@ static void test_io_channel_ipv4_fd(void)
 {
     QIOChannel *ioc;
     int fd = -1;
+    struct sockaddr_in sa = {
+        .sin_family = AF_INET,
+        .sin_addr = {
+            .s_addr =  htonl(INADDR_LOOPBACK),
+        }
+        /* Leave port unset for auto-assign */
+    };
+    socklen_t salen = sizeof(sa);
 
     fd = socket(AF_INET, SOCK_STREAM, 0);
     g_assert_cmpint(fd, >, -1);
 
+    g_assert_cmpint(bind(fd, (struct sockaddr *)&sa, salen), ==, 0);
+
     ioc = qio_channel_new_fd(fd, &error_abort);
 
     g_assert_cmpstr(object_get_typename(OBJECT(ioc)),
@@ -506,6 +501,7 @@ int main(int argc, char **argv)
     bool has_ipv4, has_ipv6;
 
     module_call_init(MODULE_INIT_QOM);
+    socket_init();
 
     g_test_init(&argc, &argv, NULL);
 
diff --git a/util/oslib-win32.c b/util/oslib-win32.c
index 438cfa4f6a..a3f0664763 100644
--- a/util/oslib-win32.c
+++ b/util/oslib-win32.c
@@ -2,7 +2,7 @@
  * os-win32.c
  *
  * Copyright (c) 2003-2008 Fabrice Bellard
- * Copyright (c) 2010 Red Hat, Inc.
+ * Copyright (c) 2010-2016 Red Hat, Inc.
  *
  * QEMU library functions for win32 which are shared between QEMU and
  * the QEMU tools.
@@ -144,6 +144,83 @@ int socket_set_fast_reuse(int fd)
     return 0;
 }
 
+
+static int socket_error(void)
+{
+    switch (WSAGetLastError()) {
+    case 0:
+        return 0;
+    case WSAEINTR:
+        return EINTR;
+    case WSAEINVAL:
+        return EINVAL;
+    case WSA_INVALID_HANDLE:
+        return EBADF;
+    case WSA_NOT_ENOUGH_MEMORY:
+        return ENOMEM;
+    case WSA_INVALID_PARAMETER:
+        return EINVAL;
+    case WSAENAMETOOLONG:
+        return ENAMETOOLONG;
+    case WSAENOTEMPTY:
+        return ENOTEMPTY;
+    case WSAEWOULDBLOCK:
+         /* not using EWOULDBLOCK as we don't want code to have
+          * to check both EWOULDBLOCK and EAGAIN */
+        return EAGAIN;
+    case WSAEINPROGRESS:
+        return EINPROGRESS;
+    case WSAEALREADY:
+        return EALREADY;
+    case WSAENOTSOCK:
+        return ENOTSOCK;
+    case WSAEDESTADDRREQ:
+        return EDESTADDRREQ;
+    case WSAEMSGSIZE:
+        return EMSGSIZE;
+    case WSAEPROTOTYPE:
+        return EPROTOTYPE;
+    case WSAENOPROTOOPT:
+        return ENOPROTOOPT;
+    case WSAEPROTONOSUPPORT:
+        return EPROTONOSUPPORT;
+    case WSAEOPNOTSUPP:
+        return EOPNOTSUPP;
+    case WSAEAFNOSUPPORT:
+        return EAFNOSUPPORT;
+    case WSAEADDRINUSE:
+        return EADDRINUSE;
+    case WSAEADDRNOTAVAIL:
+        return EADDRNOTAVAIL;
+    case WSAENETDOWN:
+        return ENETDOWN;
+    case WSAENETUNREACH:
+        return ENETUNREACH;
+    case WSAENETRESET:
+        return ENETRESET;
+    case WSAECONNABORTED:
+        return ECONNABORTED;
+    case WSAECONNRESET:
+        return ECONNRESET;
+    case WSAENOBUFS:
+        return ENOBUFS;
+    case WSAEISCONN:
+        return EISCONN;
+    case WSAENOTCONN:
+        return ENOTCONN;
+    case WSAETIMEDOUT:
+        return ETIMEDOUT;
+    case WSAECONNREFUSED:
+        return ECONNREFUSED;
+    case WSAELOOP:
+        return ELOOP;
+    case WSAEHOSTUNREACH:
+        return EHOSTUNREACH;
+    default:
+        return EIO;
+    }
+}
+
 int inet_aton(const char *cp, struct in_addr *ia)
 {
     uint32_t addr = inet_addr(cp);
@@ -504,3 +581,204 @@ pid_t qemu_fork(Error **errp)
                      "cannot fork child process");
     return -1;
 }
+
+
+#undef connect
+int qemu_connect_wrap(int sockfd, const struct sockaddr *addr,
+                      socklen_t addrlen)
+{
+    int ret;
+    ret = connect(sockfd, addr, addrlen);
+    if (ret < 0) {
+        errno = socket_error();
+    }
+    return ret;
+}
+
+
+#undef listen
+int qemu_listen_wrap(int sockfd, int backlog)
+{
+    int ret;
+    ret = listen(sockfd, backlog);
+    if (ret < 0) {
+        errno = socket_error();
+    }
+    return ret;
+}
+
+
+#undef bind
+int qemu_bind_wrap(int sockfd, const struct sockaddr *addr,
+                   socklen_t addrlen)
+{
+    int ret;
+    ret = bind(sockfd, addr, addrlen);
+    if (ret < 0) {
+        errno = socket_error();
+    }
+    return ret;
+}
+
+
+#undef socket
+int qemu_socket_wrap(int domain, int type, int protocol)
+{
+    int ret;
+    ret = socket(domain, type, protocol);
+    if (ret < 0) {
+        errno = socket_error();
+    }
+    return ret;
+}
+
+
+#undef accept
+int qemu_accept_wrap(int sockfd, struct sockaddr *addr,
+                     socklen_t *addrlen)
+{
+    int ret;
+    ret = accept(sockfd, addr, addrlen);
+    if (ret < 0) {
+        errno = socket_error();
+    }
+    return ret;
+}
+
+
+#undef shutdown
+int qemu_shutdown_wrap(int sockfd, int how)
+{
+    int ret;
+    ret = shutdown(sockfd, how);
+    if (ret < 0) {
+        errno = socket_error();
+    }
+    return ret;
+}
+
+
+#undef ioctlsocket
+int qemu_ioctlsocket_wrap(int fd, int req, void *val)
+{
+    int ret;
+    ret = ioctlsocket(fd, req, val);
+    if (ret < 0) {
+        errno = socket_error();
+    }
+    return ret;
+}
+
+
+#undef closesocket
+int qemu_closesocket_wrap(int fd)
+{
+    int ret;
+    ret = closesocket(fd);
+    if (ret < 0) {
+        errno = socket_error();
+    }
+    return ret;
+}
+
+
+#undef getsockopt
+int qemu_getsockopt_wrap(int sockfd, int level, int optname,
+                         void *optval, socklen_t *optlen)
+{
+    int ret;
+    ret = getsockopt(sockfd, level, optname, optval, optlen);
+    if (ret < 0) {
+        errno = socket_error();
+    }
+    return ret;
+}
+
+
+#undef setsockopt
+int qemu_setsockopt_wrap(int sockfd, int level, int optname,
+                         const void *optval, socklen_t optlen)
+{
+    int ret;
+    ret = setsockopt(sockfd, level, optname, optval, optlen);
+    if (ret < 0) {
+        errno = socket_error();
+    }
+    return ret;
+}
+
+
+#undef getpeername
+int qemu_getpeername_wrap(int sockfd, struct sockaddr *addr,
+                          socklen_t *addrlen)
+{
+    int ret;
+    ret = getpeername(sockfd, addr, addrlen);
+    if (ret < 0) {
+        errno = socket_error();
+    }
+    return ret;
+}
+
+
+#undef getsockname
+int qemu_getsockname_wrap(int sockfd, struct sockaddr *addr,
+                          socklen_t *addrlen)
+{
+    int ret;
+    ret = getsockname(sockfd, addr, addrlen);
+    if (ret < 0) {
+        errno = socket_error();
+    }
+    return ret;
+}
+
+
+#undef send
+ssize_t qemu_send_wrap(int sockfd, const void *buf, size_t len, int flags)
+{
+    int ret;
+    ret = send(sockfd, buf, len, flags);
+    if (ret < 0) {
+        errno = socket_error();
+    }
+    return ret;
+}
+
+
+#undef sendto
+ssize_t qemu_sendto_wrap(int sockfd, const void *buf, size_t len, int flags,
+                         const struct sockaddr *addr, socklen_t addrlen)
+{
+    int ret;
+    ret = sendto(sockfd, buf, len, flags, addr, addrlen);
+    if (ret < 0) {
+        errno = socket_error();
+    }
+    return ret;
+}
+
+
+#undef recv
+ssize_t qemu_recv_wrap(int sockfd, void *buf, size_t len, int flags)
+{
+    int ret;
+    ret = recv(sockfd, buf, len, flags);
+    if (ret < 0) {
+        errno = socket_error();
+    }
+    return ret;
+}
+
+
+#undef recvfrom
+ssize_t qemu_recvfrom_wrap(int sockfd, void *buf, size_t len, int flags,
+                           struct sockaddr *addr, socklen_t *addrlen)
+{
+    int ret;
+    ret = recvfrom(sockfd, buf, len, flags, addr, addrlen);
+    if (ret < 0) {
+        errno = socket_error();
+    }
+    return ret;
+}
diff --git a/util/qemu-coroutine-io.c b/util/qemu-coroutine-io.c
index 0d5041c1c3..91b9357d4a 100644
--- a/util/qemu-coroutine-io.c
+++ b/util/qemu-coroutine-io.c
@@ -35,18 +35,16 @@ qemu_co_sendv_recvv(int sockfd, struct iovec *iov, unsigned iov_cnt,
 {
     size_t done = 0;
     ssize_t ret;
-    int err;
     while (done < bytes) {
         ret = iov_send_recv(sockfd, iov, iov_cnt,
                             offset + done, bytes - done, do_send);
         if (ret > 0) {
             done += ret;
         } else if (ret < 0) {
-            err = socket_error();
-            if (err == EAGAIN || err == EWOULDBLOCK) {
+            if (errno == EAGAIN || errno == EWOULDBLOCK) {
                 qemu_coroutine_yield();
             } else if (done == 0) {
-                return -err;
+                return -errno;
             } else {
                 break;
             }
diff --git a/util/qemu-sockets.c b/util/qemu-sockets.c
index ad7c00c9ad..fd37ac209b 100644
--- a/util/qemu-sockets.c
+++ b/util/qemu-sockets.c
@@ -268,7 +268,7 @@ static void wait_for_connect(void *opaque)
 
     do {
         rc = qemu_getsockopt(s->fd, SOL_SOCKET, SO_ERROR, &val, &valsize);
-    } while (rc == -1 && socket_error() == EINTR);
+    } while (rc == -1 && errno == EINTR);
 
     /* update rc to contain error */
     if (!rc && val) {
@@ -330,7 +330,7 @@ static int inet_connect_addr(struct addrinfo *addr, bool *in_progress,
     do {
         rc = 0;
         if (connect(sock, addr->ai_addr, addr->ai_addrlen) < 0) {
-            rc = -socket_error();
+            rc = -errno;
         }
     } while (rc == -EINTR);
 
@@ -787,7 +787,7 @@ static int unix_connect_saddr(UnixSocketAddress *saddr, Error **errp,
     do {
         rc = 0;
         if (connect(sock, (struct sockaddr *) &un, sizeof(un)) < 0) {
-            rc = -socket_error();
+            rc = -errno;
         }
     } while (rc == -EINTR);
 
@@ -1082,7 +1082,7 @@ SocketAddress *socket_local_address(int fd, Error **errp)
     socklen_t sslen = sizeof(ss);
 
     if (getsockname(fd, (struct sockaddr *)&ss, &sslen) < 0) {
-        error_setg_errno(errp, socket_error(), "%s",
+        error_setg_errno(errp, errno, "%s",
                          "Unable to query local socket address");
         return NULL;
     }
@@ -1097,7 +1097,7 @@ SocketAddress *socket_remote_address(int fd, Error **errp)
     socklen_t sslen = sizeof(ss);
 
     if (getpeername(fd, (struct sockaddr *)&ss, &sslen) < 0) {
-        error_setg_errno(errp, socket_error(), "%s",
+        error_setg_errno(errp, errno, "%s",
                          "Unable to query remote socket address");
         return NULL;
     }