Merge branch 'upstream-merge'qemu-kvm-1.1-rc4

* upstream-merge: (44 commits)
  Update version for 1.1.0-rc4 release
  pc-bios: Update OpenBIOS images
  block: prevent snapshot mode $TMPDIR symlink attack
  xhci: add usage info to docs
  vnc: fix segfault in vnc_display_pw_expire()
  Expose CPUID leaf 7 only for -cpu host
  qemu-ga: avoid blocking on atime update when reading /etc/mtab
  qemu-ga: Fix use of environ on Darwin
  pci: call object_unparent() before free_qdev()
  fix multiboot loading if load_end_addr == 0
  vga: fix vram double-mapping with -vga std and -M pc-0.12
  cocoa: Suppress Cocoa frontend for -qtest
  arch_init: Fix AltiVec build on Darwin/ppc
  slirp: Avoid redefining MAX_TCPOPTLEN
  slirp: Avoid statements without effect on Big Endian host
  ISCSI: Switch to using READ16/WRITE16 for I/O to the LUN
  ISCSI: Only call READCAPACITY16 for SBC devices, use READCAPACITY10 for MMC
  ISCSI: get device type at connection time
  ISCSI: change num_blocks to 64-bit
  ISCSI: redo how we set up the events
  ...

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

42 files changed, 584 insertions, 218 deletions

diff --git a/VERSION b/VERSION
index 87903b67d..00572cea3 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-1.0.93
+1.0.94
diff --git a/arch_init.c b/arch_init.c
index 988adcae0..a9e8b7442 100644
--- a/arch_init.c
+++ b/arch_init.c
@@ -100,6 +100,10 @@ const uint32_t arch_type = QEMU_ARCH;
 #define VECTYPE        vector unsigned char
 #define SPLAT(p)       vec_splat(vec_ld(0, p), 0)
 #define ALL_EQ(v1, v2) vec_all_eq(v1, v2)
+/* altivec.h may redefine the bool macro as vector type.
+ * Reset it to POSIX semantics. */
+#undef bool
+#define bool _Bool
 #elif defined __SSE2__
 #include <emmintrin.h>
 #define VECTYPE        __m128i
diff --git a/audio/audio.c b/audio/audio.c
index bd9237e9d..583ee51ea 100644
--- a/audio/audio.c
+++ b/audio/audio.c
@@ -1775,10 +1775,12 @@ static void audio_atexit (void)
     HWVoiceOut *hwo = NULL;
     HWVoiceIn *hwi = NULL;
 
-    while ((hwo = audio_pcm_hw_find_any_enabled_out (hwo))) {
+    while ((hwo = audio_pcm_hw_find_any_out (hwo))) {
         SWVoiceCap *sc;
 
-        hwo->pcm_ops->ctl_out (hwo, VOICE_DISABLE);
+        if (hwo->enabled) {
+            hwo->pcm_ops->ctl_out (hwo, VOICE_DISABLE);
+        }
         hwo->pcm_ops->fini_out (hwo);
 
         for (sc = hwo->cap_head.lh_first; sc; sc = sc->entries.le_next) {
@@ -1791,8 +1793,10 @@ static void audio_atexit (void)
         }
     }
 
-    while ((hwi = audio_pcm_hw_find_any_enabled_in (hwi))) {
-        hwi->pcm_ops->ctl_in (hwi, VOICE_DISABLE);
+    while ((hwi = audio_pcm_hw_find_any_in (hwi))) {
+        if (hwi->enabled) {
+            hwi->pcm_ops->ctl_in (hwi, VOICE_DISABLE);
+        }
         hwi->pcm_ops->fini_in (hwi);
     }
 
diff --git a/block.c b/block.c
index af2ab4f3e..7547051ec 100644
--- a/block.c
+++ b/block.c
@@ -409,28 +409,36 @@ int bdrv_create_file(const char* filename, QEMUOptionParameter *options)
     return bdrv_create(drv, filename, options);
 }
 
-#ifdef _WIN32
-void get_tmp_filename(char *filename, int size)
+/*
+ * Create a uniquely-named empty temporary file.
+ * Return 0 upon success, otherwise a negative errno value.
+ */
+int get_tmp_filename(char *filename, int size)
 {
+#ifdef _WIN32
     char temp_dir[MAX_PATH];
-
-    GetTempPath(MAX_PATH, temp_dir);
-    GetTempFileName(temp_dir, "qem", 0, filename);
-}
+    /* GetTempFileName requires that its output buffer (4th param)
+       have length MAX_PATH or greater.  */
+    assert(size >= MAX_PATH);
+    return (GetTempPath(MAX_PATH, temp_dir)
+            && GetTempFileName(temp_dir, "qem", 0, filename)
+            ? 0 : -GetLastError());
 #else
-void get_tmp_filename(char *filename, int size)
-{
     int fd;
     const char *tmpdir;
-    /* XXX: race condition possible */
     tmpdir = getenv("TMPDIR");
     if (!tmpdir)
         tmpdir = "/tmp";
-    snprintf(filename, size, "%s/vl.XXXXXX", tmpdir);
+    if (snprintf(filename, size, "%s/vl.XXXXXX", tmpdir) >= size) {
+        return -EOVERFLOW;
+    }
     fd = mkstemp(filename);
-    close(fd);
-}
+    if (fd < 0 || close(fd)) {
+        return -errno;
+    }
+    return 0;
 #endif
+}
 
 /*
  * Detect host devices. By convention, /dev/cdrom[N] is always
@@ -753,7 +761,10 @@ int bdrv_open(BlockDriverState *bs, const char *filename, int flags,
 
         bdrv_delete(bs1);
 
-        get_tmp_filename(tmp_filename, sizeof(tmp_filename));
+        ret = get_tmp_filename(tmp_filename, sizeof(tmp_filename));
+        if (ret < 0) {
+            return ret;
+        }
 
         /* Real path is meaningless for protocols */
         if (is_protocol)
diff --git a/block/iscsi.c b/block/iscsi.c
index d37c4ee17..22888a084 100644
--- a/block/iscsi.c
+++ b/block/iscsi.c
@@ -25,10 +25,12 @@
 #include "config-host.h"
 
 #include <poll.h>
+#include <arpa/inet.h>
 #include "qemu-common.h"
 #include "qemu-error.h"
 #include "block_int.h"
 #include "trace.h"
+#include "hw/scsi-defs.h"
 
 #include <iscsi/iscsi.h>
 #include <iscsi/scsi-lowlevel.h>
@@ -37,8 +39,10 @@
 typedef struct IscsiLun {
     struct iscsi_context *iscsi;
     int lun;
+    enum scsi_inquiry_peripheral_device_type type;
     int block_size;
-    unsigned long num_blocks;
+    uint64_t num_blocks;
+    int events;
 } IscsiLun;
 
 typedef struct IscsiAIOCB {
@@ -104,11 +108,27 @@ static void
 iscsi_set_events(IscsiLun *iscsilun)
 {
     struct iscsi_context *iscsi = iscsilun->iscsi;
+    int ev;
 
-    qemu_aio_set_fd_handler(iscsi_get_fd(iscsi), iscsi_process_read,
-                           (iscsi_which_events(iscsi) & POLLOUT)
-                           ? iscsi_process_write : NULL,
-                           iscsi_process_flush, iscsilun);
+    /* We always register a read handler.  */
+    ev = POLLIN;
+    ev |= iscsi_which_events(iscsi);
+    if (ev != iscsilun->events) {
+        qemu_aio_set_fd_handler(iscsi_get_fd(iscsi),
+                      iscsi_process_read,
+                      (ev & POLLOUT) ? iscsi_process_write : NULL,
+                      iscsi_process_flush,
+                      iscsilun);
+
+    }
+
+    /* If we just added an event, the callback might be delayed
+     * unless we call qemu_notify_event().
+     */
+    if (ev & ~iscsilun->events) {
+        qemu_notify_event();
+    }
+    iscsilun->events = ev;
 }
 
 static void
@@ -161,12 +181,12 @@ iscsi_readv_writev_bh_cb(void *p)
 
 
 static void
-iscsi_aio_write10_cb(struct iscsi_context *iscsi, int status,
+iscsi_aio_write16_cb(struct iscsi_context *iscsi, int status,
                      void *command_data, void *opaque)
 {
     IscsiAIOCB *acb = opaque;
 
-    trace_iscsi_aio_write10_cb(iscsi, status, acb, acb->canceled);
+    trace_iscsi_aio_write16_cb(iscsi, status, acb, acb->canceled);
 
     g_free(acb->buf);
 
@@ -179,7 +199,7 @@ iscsi_aio_write10_cb(struct iscsi_context *iscsi, int status,
 
     acb->status = 0;
     if (status < 0) {
-        error_report("Failed to write10 data to iSCSI lun. %s",
+        error_report("Failed to write16 data to iSCSI lun. %s",
                      iscsi_get_error(iscsi));
         acb->status = -EIO;
     }
@@ -204,12 +224,9 @@ iscsi_aio_writev(BlockDriverState *bs, int64_t sector_num,
     struct iscsi_context *iscsi = iscsilun->iscsi;
     IscsiAIOCB *acb;
     size_t size;
-    int fua = 0;
-
-    /* set FUA on writes when cache mode is write through */
-    if (!(bs->open_flags & BDRV_O_CACHE_WB)) {
-        fua = 1;
-    }
+    uint32_t num_sectors;
+    uint64_t lba;
+    struct iscsi_data data;
 
     acb = qemu_aio_get(&iscsi_aio_pool, bs, cb, opaque);
     trace_iscsi_aio_writev(iscsi, sector_num, nb_sectors, opaque, acb);
@@ -219,18 +236,44 @@ iscsi_aio_writev(BlockDriverState *bs, int64_t sector_num,
 
     acb->canceled   = 0;
 
-    /* XXX we should pass the iovec to write10 to avoid the extra copy */
+    /* XXX we should pass the iovec to write16 to avoid the extra copy */
     /* this will allow us to get rid of 'buf' completely */
     size = nb_sectors * BDRV_SECTOR_SIZE;
     acb->buf = g_malloc(size);
     qemu_iovec_to_buffer(acb->qiov, acb->buf);
-    acb->task = iscsi_write10_task(iscsi, iscsilun->lun, acb->buf, size,
-                              sector_qemu2lun(sector_num, iscsilun),
-                              fua, 0, iscsilun->block_size,
-                              iscsi_aio_write10_cb, acb);
+
+
+    acb->task = malloc(sizeof(struct scsi_task));
     if (acb->task == NULL) {
-        error_report("iSCSI: Failed to send write10 command. %s",
-                     iscsi_get_error(iscsi));
+        error_report("iSCSI: Failed to allocate task for scsi WRITE16 "
+                     "command. %s", iscsi_get_error(iscsi));
+        qemu_aio_release(acb);
+        return NULL;
+    }
+    memset(acb->task, 0, sizeof(struct scsi_task));
+
+    acb->task->xfer_dir = SCSI_XFER_WRITE;
+    acb->task->cdb_size = 16;
+    acb->task->cdb[0] = 0x8a;
+    if (!(bs->open_flags & BDRV_O_CACHE_WB)) {
+        /* set FUA on writes when cache mode is write through */
+        acb->task->cdb[1] |= 0x04;
+    }
+    lba = sector_qemu2lun(sector_num, iscsilun);
+    *(uint32_t *)&acb->task->cdb[2]  = htonl(lba >> 32);
+    *(uint32_t *)&acb->task->cdb[6]  = htonl(lba & 0xffffffff);
+    num_sectors = size / iscsilun->block_size;
+    *(uint32_t *)&acb->task->cdb[10] = htonl(num_sectors);
+    acb->task->expxferlen = size;
+
+    data.data = acb->buf;
+    data.size = size;
+
+    if (iscsi_scsi_command_async(iscsi, iscsilun->lun, acb->task,
+                                 iscsi_aio_write16_cb,
+                                 &data,
+                                 acb) != 0) {
+        scsi_free_scsi_task(acb->task);
         g_free(acb->buf);
         qemu_aio_release(acb);
         return NULL;
@@ -242,12 +285,12 @@ iscsi_aio_writev(BlockDriverState *bs, int64_t sector_num,
 }
 
 static void
-iscsi_aio_read10_cb(struct iscsi_context *iscsi, int status,
+iscsi_aio_read16_cb(struct iscsi_context *iscsi, int status,
                     void *command_data, void *opaque)
 {
     IscsiAIOCB *acb = opaque;
 
-    trace_iscsi_aio_read10_cb(iscsi, status, acb, acb->canceled);
+    trace_iscsi_aio_read16_cb(iscsi, status, acb, acb->canceled);
 
     if (acb->canceled != 0) {
         qemu_aio_release(acb);
@@ -258,7 +301,7 @@ iscsi_aio_read10_cb(struct iscsi_context *iscsi, int status,
 
     acb->status = 0;
     if (status != 0) {
-        error_report("Failed to read10 data from iSCSI lun. %s",
+        error_report("Failed to read16 data from iSCSI lun. %s",
                      iscsi_get_error(iscsi));
         acb->status = -EIO;
     }
@@ -277,8 +320,10 @@ iscsi_aio_readv(BlockDriverState *bs, int64_t sector_num,
     IscsiLun *iscsilun = bs->opaque;
     struct iscsi_context *iscsi = iscsilun->iscsi;
     IscsiAIOCB *acb;
-    size_t qemu_read_size, lun_read_size;
+    size_t qemu_read_size;
     int i;
+    uint64_t lba;
+    uint32_t num_sectors;
 
     qemu_read_size = BDRV_SECTOR_SIZE * (size_t)nb_sectors;
 
@@ -303,16 +348,44 @@ iscsi_aio_readv(BlockDriverState *bs, int64_t sector_num,
         acb->read_offset  = bdrv_offset % iscsilun->block_size;
     }
 
-    lun_read_size  = (qemu_read_size + iscsilun->block_size
-                     + acb->read_offset - 1)
-                     / iscsilun->block_size * iscsilun->block_size;
-    acb->task = iscsi_read10_task(iscsi, iscsilun->lun,
-                             sector_qemu2lun(sector_num, iscsilun),
-                             lun_read_size, iscsilun->block_size,
-                             iscsi_aio_read10_cb, acb);
+    num_sectors  = (qemu_read_size + iscsilun->block_size
+                    + acb->read_offset - 1)
+                    / iscsilun->block_size;
+
+    acb->task = malloc(sizeof(struct scsi_task));
     if (acb->task == NULL) {
-        error_report("iSCSI: Failed to send read10 command. %s",
-                     iscsi_get_error(iscsi));
+        error_report("iSCSI: Failed to allocate task for scsi READ16 "
+                     "command. %s", iscsi_get_error(iscsi));
+        qemu_aio_release(acb);
+        return NULL;
+    }
+    memset(acb->task, 0, sizeof(struct scsi_task));
+
+    acb->task->xfer_dir = SCSI_XFER_READ;
+    lba = sector_qemu2lun(sector_num, iscsilun);
+    acb->task->expxferlen = qemu_read_size;
+
+    switch (iscsilun->type) {
+    case TYPE_DISK:
+        acb->task->cdb_size = 16;
+        acb->task->cdb[0]  = 0x88;
+        *(uint32_t *)&acb->task->cdb[2]  = htonl(lba >> 32);
+        *(uint32_t *)&acb->task->cdb[6]  = htonl(lba & 0xffffffff);
+        *(uint32_t *)&acb->task->cdb[10] = htonl(num_sectors);
+        break;
+    default:
+        acb->task->cdb_size = 10;
+        acb->task->cdb[0]  = 0x28;
+        *(uint32_t *)&acb->task->cdb[2] = htonl(lba);
+        *(uint16_t *)&acb->task->cdb[7] = htons(num_sectors);
+        break;
+    }
+    
+    if (iscsi_scsi_command_async(iscsi, iscsilun->lun, acb->task,
+                                 iscsi_aio_read16_cb,
+                                 NULL,
+                                 acb) != 0) {
+        scsi_free_scsi_task(acb->task);
         qemu_aio_release(acb);
         return NULL;
     }
@@ -491,6 +564,98 @@ iscsi_readcapacity16_cb(struct iscsi_context *iscsi, int status,
 }
 
 static void
+iscsi_readcapacity10_cb(struct iscsi_context *iscsi, int status,
+                        void *command_data, void *opaque)
+{
+    struct IscsiTask *itask = opaque;
+    struct scsi_readcapacity10 *rc10;
+    struct scsi_task *task = command_data;
+
+    if (status != 0) {
+        error_report("iSCSI: Failed to read capacity of iSCSI lun. %s",
+                     iscsi_get_error(iscsi));
+        itask->status   = 1;
+        itask->complete = 1;
+        scsi_free_scsi_task(task);
+        return;
+    }
+
+    rc10 = scsi_datain_unmarshall(task);
+    if (rc10 == NULL) {
+        error_report("iSCSI: Failed to unmarshall readcapacity10 data.");
+        itask->status   = 1;
+        itask->complete = 1;
+        scsi_free_scsi_task(task);
+        return;
+    }
+
+    itask->iscsilun->block_size = rc10->block_size;
+    itask->iscsilun->num_blocks = rc10->lba + 1;
+    itask->bs->total_sectors    = itask->iscsilun->num_blocks *
+                               itask->iscsilun->block_size / BDRV_SECTOR_SIZE ;
+
+    itask->status   = 0;
+    itask->complete = 1;
+    scsi_free_scsi_task(task);
+}
+
+static void
+iscsi_inquiry_cb(struct iscsi_context *iscsi, int status, void *command_data,
+                 void *opaque)
+{
+    struct IscsiTask *itask = opaque;
+    struct scsi_task *task = command_data;
+    struct scsi_inquiry_standard *inq;
+
+    if (status != 0) {
+        itask->status   = 1;
+        itask->complete = 1;
+        scsi_free_scsi_task(task);
+        return;
+    }
+
+    inq = scsi_datain_unmarshall(task);
+    if (inq == NULL) {
+        error_report("iSCSI: Failed to unmarshall inquiry data.");
+        itask->status   = 1;
+        itask->complete = 1;
+        scsi_free_scsi_task(task);
+        return;
+    }
+
+    itask->iscsilun->type = inq->periperal_device_type;
+
+    scsi_free_scsi_task(task);
+
+    switch (itask->iscsilun->type) {
+    case TYPE_DISK:
+        task = iscsi_readcapacity16_task(iscsi, itask->iscsilun->lun,
+                                   iscsi_readcapacity16_cb, opaque);
+        if (task == NULL) {
+            error_report("iSCSI: failed to send readcapacity16 command.");
+            itask->status   = 1;
+            itask->complete = 1;
+            return;
+        }
+        break;
+    case TYPE_ROM:
+        task = iscsi_readcapacity10_task(iscsi, itask->iscsilun->lun,
+                                   0, 0,
+                                   iscsi_readcapacity10_cb, opaque);
+        if (task == NULL) {
+            error_report("iSCSI: failed to send readcapacity16 command.");
+            itask->status   = 1;
+            itask->complete = 1;
+            return;
+        }
+        break;
+    default:
+        itask->status   = 0;
+        itask->complete = 1;
+    }
+}
+
+static void
 iscsi_connect_cb(struct iscsi_context *iscsi, int status, void *command_data,
                  void *opaque)
 {
@@ -503,10 +668,11 @@ iscsi_connect_cb(struct iscsi_context *iscsi, int status, void *command_data,
         return;
     }
 
-    task = iscsi_readcapacity16_task(iscsi, itask->iscsilun->lun,
-                                   iscsi_readcapacity16_cb, opaque);
+    task = iscsi_inquiry_task(iscsi, itask->iscsilun->lun,
+                              0, 0, 36,
+                              iscsi_inquiry_cb, opaque);
     if (task == NULL) {
-        error_report("iSCSI: failed to send readcapacity16 command.");
+        error_report("iSCSI: failed to send inquiry command.");
         itask->status   = 1;
         itask->complete = 1;
         return;
diff --git a/block/qcow2-cluster.c b/block/qcow2-cluster.c
index 10c22fe12..4b3345b11 100644
--- a/block/qcow2-cluster.c
+++ b/block/qcow2-cluster.c
@@ -762,7 +762,6 @@ static int do_alloc_cluster_offset(BlockDriverState *bs, uint64_t guest_offset,
     uint64_t *host_offset, unsigned int *nb_clusters)
 {
     BDRVQcowState *s = bs->opaque;
-    int64_t cluster_offset;
     QCowL2Meta *old_alloc;
 
     trace_qcow2_do_alloc_clusters_offset(qemu_coroutine_self(), guest_offset,
@@ -808,17 +807,21 @@ static int do_alloc_cluster_offset(BlockDriverState *bs, uint64_t guest_offset,
     /* Allocate new clusters */
     trace_qcow2_cluster_alloc_phys(qemu_coroutine_self());
     if (*host_offset == 0) {
-        cluster_offset = qcow2_alloc_clusters(bs, *nb_clusters * s->cluster_size);
+        int64_t cluster_offset =
+            qcow2_alloc_clusters(bs, *nb_clusters * s->cluster_size);
+        if (cluster_offset < 0) {
+            return cluster_offset;
+        }
+        *host_offset = cluster_offset;
+        return 0;
     } else {
-        cluster_offset = *host_offset;
-        *nb_clusters = qcow2_alloc_clusters_at(bs, cluster_offset, *nb_clusters);
-    }
-
-    if (cluster_offset < 0) {
-        return cluster_offset;
+        int ret = qcow2_alloc_clusters_at(bs, *host_offset, *nb_clusters);
+        if (ret < 0) {
+            return ret;
+        }
+        *nb_clusters = ret;
+        return 0;
     }
-    *host_offset = cluster_offset;
-    return 0;
 }
 
 /*
diff --git a/block/qcow2.c b/block/qcow2.c
index 655799c6a..c2e49cded 100644
--- a/block/qcow2.c
+++ b/block/qcow2.c
@@ -919,7 +919,8 @@ int qcow2_update_header(BlockDriverState *bs)
         ret = sizeof(*header);
         break;
     default:
-        return -EINVAL;
+        ret = -EINVAL;
+        goto fail;
     }
 
     buf += ret;
diff --git a/block/sheepdog.c b/block/sheepdog.c
index e01d37168..6d52277a8 100644
--- a/block/sheepdog.c
+++ b/block/sheepdog.c
@@ -468,7 +468,7 @@ static int connect_to_sdog(const char *addr, const char *port)
     if (ret) {
         error_report("unable to get address info %s, %s",
                      addr, strerror(errno));
-        return -1;
+        return -errno;
     }
 
     for (res = res0; res; res = res->ai_next) {
@@ -495,7 +495,7 @@ static int connect_to_sdog(const char *addr, const char *port)
         dprintf("connected to %s:%s\n", addr, port);
         goto success;
     }
-    fd = -1;
+    fd = -errno;
     error_report("failed connect to %s:%s", addr, port);
 success:
     freeaddrinfo(res0);
@@ -510,12 +510,13 @@ static int send_req(int sockfd, SheepdogReq *hdr, void *data,
     ret = qemu_send_full(sockfd, hdr, sizeof(*hdr), 0);
     if (ret < sizeof(*hdr)) {
         error_report("failed to send a req, %s", strerror(errno));
-        return ret;
+        return -errno;
     }
 
     ret = qemu_send_full(sockfd, data, *wlen, 0);
     if (ret < *wlen) {
         error_report("failed to send a req, %s", strerror(errno));
+        ret = -errno;
     }
 
     return ret;
@@ -553,6 +554,7 @@ static int do_req(int sockfd, SheepdogReq *hdr, void *data,
     ret = qemu_recv_full(sockfd, hdr, sizeof(*hdr), 0);
     if (ret < sizeof(*hdr)) {
         error_report("failed to get a rsp, %s", strerror(errno));
+        ret = -errno;
         goto out;
     }
 
@@ -564,6 +566,7 @@ static int do_req(int sockfd, SheepdogReq *hdr, void *data,
         ret = qemu_recv_full(sockfd, data, *rlen, 0);
         if (ret < *rlen) {
             error_report("failed to get the data, %s", strerror(errno));
+            ret = -errno;
             goto out;
         }
     }
@@ -587,6 +590,7 @@ static int do_co_req(int sockfd, SheepdogReq *hdr, void *data,
     ret = qemu_co_recv(sockfd, hdr, sizeof(*hdr));
     if (ret < sizeof(*hdr)) {
         error_report("failed to get a rsp, %s", strerror(errno));
+        ret = -errno;
         goto out;
     }
 
@@ -598,6 +602,7 @@ static int do_co_req(int sockfd, SheepdogReq *hdr, void *data,
         ret = qemu_co_recv(sockfd, data, *rlen);
         if (ret < *rlen) {
             error_report("failed to get the data, %s", strerror(errno));
+            ret = -errno;
             goto out;
         }
     }
@@ -787,7 +792,7 @@ static int get_sheep_fd(BDRVSheepdogState *s)
     fd = connect_to_sdog(s->addr, s->port);
     if (fd < 0) {
         error_report("%s", strerror(errno));
-        return -1;
+        return fd;
     }
 
     socket_set_nonblock(fd);
@@ -796,7 +801,7 @@ static int get_sheep_fd(BDRVSheepdogState *s)
     if (ret) {
         error_report("%s", strerror(errno));
         closesocket(fd);
-        return -1;
+        return -errno;
     }
 
     qemu_aio_set_fd_handler(fd, co_read_response, NULL, aio_flush_request, s);
@@ -883,7 +888,7 @@ static int find_vdi_name(BDRVSheepdogState *s, char *filename, uint32_t snapid,
 
     fd = connect_to_sdog(s->addr, s->port);
     if (fd < 0) {
-        return -1;
+        return fd;
     }
 
     memset(buf, 0, sizeof(buf));
@@ -904,14 +909,17 @@ static int find_vdi_name(BDRVSheepdogState *s, char *filename, uint32_t snapid,
 
     ret = do_req(fd, (SheepdogReq *)&hdr, buf, &wlen, &rlen);
     if (ret) {
-        ret = -1;
         goto out;
     }
 
     if (rsp->result != SD_RES_SUCCESS) {
         error_report("cannot get vdi info, %s, %s %d %s",
                      sd_strerror(rsp->result), filename, snapid, tag);
-        ret = -1;
+        if (rsp->result == SD_RES_NO_VDI) {
+            ret = -ENOENT;
+        } else {
+            ret = -EIO;
+        }
         goto out;
     }
     *vid = rsp->vdi_id;
@@ -980,7 +988,7 @@ static int coroutine_fn add_aio_request(BDRVSheepdogState *s, AIOReq *aio_req,
     if (ret < 0) {
         qemu_co_mutex_unlock(&s->lock);
         error_report("failed to send a req, %s", strerror(errno));
-        return -EIO;
+        return -errno;
     }
 
     if (wlen) {
@@ -988,7 +996,7 @@ static int coroutine_fn add_aio_request(BDRVSheepdogState *s, AIOReq *aio_req,
         if (ret < 0) {
             qemu_co_mutex_unlock(&s->lock);
             error_report("failed to send a data, %s", strerror(errno));
-            return -EIO;
+            return -errno;
         }
     }
 
@@ -1038,7 +1046,7 @@ static int read_write_object(int fd, char *buf, uint64_t oid, int copies,
     ret = do_req(fd, (SheepdogReq *)&hdr, buf, &wlen, &rlen);
     if (ret) {
         error_report("failed to send a request to the sheep");
-        return -1;
+        return ret;
     }
 
     switch (rsp->result) {
@@ -1046,7 +1054,7 @@ static int read_write_object(int fd, char *buf, uint64_t oid, int copies,
         return 0;
     default:
         error_report("%s", sd_strerror(rsp->result));
-        return -1;
+        return -EIO;
     }
 }
 
@@ -1082,10 +1090,12 @@ static int sd_open(BlockDriverState *bs, const char *filename, int flags)
     memset(vdi, 0, sizeof(vdi));
     memset(tag, 0, sizeof(tag));
     if (parse_vdiname(s, filename, vdi, &snapid, tag) < 0) {
+        ret = -EINVAL;
         goto out;
     }
     s->fd = get_sheep_fd(s);
     if (s->fd < 0) {
+        ret = s->fd;
         goto out;
     }
 
@@ -1099,11 +1109,12 @@ static int sd_open(BlockDriverState *bs, const char *filename, int flags)
         s->flush_fd = connect_to_sdog(s->addr, s->port);
         if (s->flush_fd < 0) {
             error_report("failed to connect");
+            ret = s->flush_fd;
             goto out;
         }
     }
 
-    if (snapid) {
+    if (snapid || tag[0] != '\0') {
         dprintf("%" PRIx32 " snapshot inode was open.\n", vid);
         s->is_snapshot = 1;
     }
@@ -1111,6 +1122,7 @@ static int sd_open(BlockDriverState *bs, const char *filename, int flags)
     fd = connect_to_sdog(s->addr, s->port);
     if (fd < 0) {
         error_report("failed to connect");
+        ret = fd;
         goto out;
     }
 
@@ -1139,7 +1151,7 @@ out:
         closesocket(s->fd);
     }
     g_free(buf);
-    return -1;
+    return ret;
 }
 
 static int do_sd_create(char *filename, int64_t vdi_size,
@@ -1154,7 +1166,7 @@ static int do_sd_create(char *filename, int64_t vdi_size,
 
     fd = connect_to_sdog(addr, port);
     if (fd < 0) {
-        return -EIO;
+        return fd;
     }
 
     memset(buf, 0, sizeof(buf));
@@ -1177,7 +1189,7 @@ static int do_sd_create(char *filename, int64_t vdi_size,
     closesocket(fd);
 
     if (ret) {
-        return -EIO;
+        return ret;
     }
 
     if (rsp->result != SD_RES_SUCCESS) {
@@ -1237,24 +1249,26 @@ out:
 
 static int sd_create(const char *filename, QEMUOptionParameter *options)
 {
-    int ret;
+    int ret = 0;
     uint32_t vid = 0, base_vid = 0;
     int64_t vdi_size = 0;
     char *backing_file = NULL;
-    BDRVSheepdogState s;
+    BDRVSheepdogState *s;
     char vdi[SD_MAX_VDI_LEN], tag[SD_MAX_VDI_TAG_LEN];
     uint32_t snapid;
     int prealloc = 0;
     const char *vdiname;
 
+    s = g_malloc0(sizeof(BDRVSheepdogState));
+
     strstart(filename, "sheepdog:", &vdiname);
 
-    memset(&s, 0, sizeof(s));
     memset(vdi, 0, sizeof(vdi));
     memset(tag, 0, sizeof(tag));
-    if (parse_vdiname(&s, vdiname, vdi, &snapid, tag) < 0) {
+    if (parse_vdiname(s, vdiname, vdi, &snapid, tag) < 0) {
         error_report("invalid filename");
-        return -EINVAL;
+        ret = -EINVAL;
+        goto out;
     }
 
     while (options && options->name) {
@@ -1270,7 +1284,8 @@ static int sd_create(const char *filename, QEMUOptionParameter *options)
             } else {
                 error_report("Invalid preallocation mode: '%s'",
                              options->value.s);
-                return -EINVAL;
+                ret = -EINVAL;
+                goto out;
             }
         }
         options++;
@@ -1278,7 +1293,8 @@ static int sd_create(const char *filename, QEMUOptionParameter *options)
 
     if (vdi_size > SD_MAX_VDI_SIZE) {
         error_report("too big image size");
-        return -EINVAL;
+        ret = -EINVAL;
+        goto out;
     }
 
     if (backing_file) {
@@ -1290,31 +1306,37 @@ static int sd_create(const char *filename, QEMUOptionParameter *options)
         drv = bdrv_find_protocol(backing_file);
         if (!drv || strcmp(drv->protocol_name, "sheepdog") != 0) {
             error_report("backing_file must be a sheepdog image");
-            return -EINVAL;
+            ret = -EINVAL;
+            goto out;
         }
 
         ret = bdrv_file_open(&bs, backing_file, 0);
-        if (ret < 0)
-            return -EIO;
+        if (ret < 0) {
+            goto out;
+        }
 
         s = bs->opaque;
 
         if (!is_snapshot(&s->inode)) {
             error_report("cannot clone from a non snapshot vdi");
             bdrv_delete(bs);
-            return -EINVAL;
+            ret = -EINVAL;
+            goto out;
         }
 
         base_vid = s->inode.vdi_id;
         bdrv_delete(bs);
     }
 
-    ret = do_sd_create(vdi, vdi_size, base_vid, &vid, 0, s.addr, s.port);
+    ret = do_sd_create(vdi, vdi_size, base_vid, &vid, 0, s->addr, s->port);
     if (!prealloc || ret) {
-        return ret;
+        goto out;
     }
 
-    return sd_prealloc(filename);
+    ret = sd_prealloc(filename);
+out:
+    g_free(s);
+    return ret;
 }
 
 static void sd_close(BlockDriverState *bs)
@@ -1379,7 +1401,7 @@ static int sd_truncate(BlockDriverState *bs, int64_t offset)
 
     fd = connect_to_sdog(s->addr, s->port);
     if (fd < 0) {
-        return -EIO;
+        return fd;
     }
 
     /* we don't need to update entire object */
@@ -1391,10 +1413,9 @@ static int sd_truncate(BlockDriverState *bs, int64_t offset)
 
     if (ret < 0) {
         error_report("failed to update an inode.");
-        return -EIO;
     }
 
-    return 0;
+    return ret;
 }
 
 /*
@@ -1464,6 +1485,7 @@ static int sd_create_branch(BDRVSheepdogState *s)
     fd = connect_to_sdog(s->addr, s->port);
     if (fd < 0) {
         error_report("failed to connect");
+        ret = fd;
         goto out;
     }
 
@@ -1606,8 +1628,9 @@ static coroutine_fn int sd_co_writev(BlockDriverState *bs, int64_t sector_num,
 
     if (bs->growable && sector_num + nb_sectors > bs->total_sectors) {
         /* TODO: shouldn't block here */
-        if (sd_truncate(bs, (sector_num + nb_sectors) * SECTOR_SIZE) < 0) {
-            return -EIO;
+        ret = sd_truncate(bs, (sector_num + nb_sectors) * SECTOR_SIZE);
+        if (ret < 0) {
+            return ret;
         }
         bs->total_sectors = sector_num + nb_sectors;
     }
@@ -1724,7 +1747,7 @@ static int sd_snapshot_create(BlockDriverState *bs, QEMUSnapshotInfo *sn_info)
     /* refresh inode. */
     fd = connect_to_sdog(s->addr, s->port);
     if (fd < 0) {
-        ret = -EIO;
+        ret = fd;
         goto cleanup;
     }
 
@@ -1732,7 +1755,6 @@ static int sd_snapshot_create(BlockDriverState *bs, QEMUSnapshotInfo *sn_info)
                        s->inode.nr_copies, datalen, 0, 0, s->cache_enabled);
     if (ret < 0) {
         error_report("failed to write snapshot's inode.");
-        ret = -EIO;
         goto cleanup;
     }
 
@@ -1741,7 +1763,6 @@ static int sd_snapshot_create(BlockDriverState *bs, QEMUSnapshotInfo *sn_info)
     if (ret < 0) {
         error_report("failed to create inode for snapshot. %s",
                      strerror(errno));
-        ret = -EIO;
         goto cleanup;
     }
 
@@ -1752,7 +1773,6 @@ static int sd_snapshot_create(BlockDriverState *bs, QEMUSnapshotInfo *sn_info)
 
     if (ret < 0) {
         error_report("failed to read new inode info. %s", strerror(errno));
-        ret = -EIO;
         goto cleanup;
     }
 
@@ -1773,7 +1793,7 @@ static int sd_snapshot_goto(BlockDriverState *bs, const char *snapshot_id)
     char *buf = NULL;
     uint32_t vid;
     uint32_t snapid = 0;
-    int ret = -ENOENT, fd;
+    int ret = 0, fd;
 
     old_s = g_malloc(sizeof(BDRVSheepdogState));
 
@@ -1791,13 +1811,13 @@ static int sd_snapshot_goto(BlockDriverState *bs, const char *snapshot_id)
     ret = find_vdi_name(s, vdi, snapid, tag, &vid, 1);
     if (ret) {
         error_report("Failed to find_vdi_name");
-        ret = -ENOENT;
         goto out;
     }
 
     fd = connect_to_sdog(s->addr, s->port);
     if (fd < 0) {
         error_report("failed to connect");
+        ret = fd;
         goto out;
     }
 
@@ -1808,7 +1828,6 @@ static int sd_snapshot_goto(BlockDriverState *bs, const char *snapshot_id)
     closesocket(fd);
 
     if (ret) {
-        ret = -ENOENT;
         goto out;
     }
 
@@ -1861,6 +1880,7 @@ static int sd_snapshot_list(BlockDriverState *bs, QEMUSnapshotInfo **psn_tab)
 
     fd = connect_to_sdog(s->addr, s->port);
     if (fd < 0) {
+        ret = fd;
         goto out;
     }
 
@@ -1888,6 +1908,7 @@ static int sd_snapshot_list(BlockDriverState *bs, QEMUSnapshotInfo **psn_tab)
     fd = connect_to_sdog(s->addr, s->port);
     if (fd < 0) {
         error_report("failed to connect");
+        ret = fd;
         goto out;
     }
 
@@ -1925,6 +1946,10 @@ out:
 
     g_free(vdi_inuse);
 
+    if (ret < 0) {
+        return ret;
+    }
+
     return found;
 }
 
@@ -1940,8 +1965,7 @@ static int do_load_save_vmstate(BDRVSheepdogState *s, uint8_t *data,
 
     fd = connect_to_sdog(s->addr, s->port);
     if (fd < 0) {
-        ret = -EIO;
-        goto cleanup;
+        return fd;
     }
 
     while (size) {
@@ -1965,7 +1989,6 @@ static int do_load_save_vmstate(BDRVSheepdogState *s, uint8_t *data,
 
         if (ret < 0) {
             error_report("failed to save vmstate %s", strerror(errno));
-            ret = -EIO;
             goto cleanup;
         }
 
diff --git a/block/vvfat.c b/block/vvfat.c
index 2dc9d5088..0fd3367d8 100644
--- a/block/vvfat.c
+++ b/block/vvfat.c
@@ -2808,7 +2808,12 @@ static int enable_write_target(BDRVVVFATState *s)
     array_init(&(s->commits), sizeof(commit_t));
 
     s->qcow_filename = g_malloc(1024);
-    get_tmp_filename(s->qcow_filename, 1024);
+    ret = get_tmp_filename(s->qcow_filename, 1024);
+    if (ret < 0) {
+        g_free(s->qcow_filename);
+        s->qcow_filename = NULL;
+        return ret;
+    }
 
     bdrv_qcow = bdrv_find_format("qcow");
     options = parse_option_parameters("", bdrv_qcow->create_options, NULL);
diff --git a/block_int.h b/block_int.h
index b80e66db6..3d4abc657 100644
--- a/block_int.h
+++ b/block_int.h
@@ -335,7 +335,7 @@ struct BlockDriverState {
     BlockJob *job;
 };
 
-void get_tmp_filename(char *filename, int size);
+int get_tmp_filename(char *filename, int size);
 
 void bdrv_set_io_limits(BlockDriverState *bs,
                         BlockIOLimit *io_limits);
diff --git a/configure b/configure
index 6704f265d..38dafec8a 100755
--- a/configure
+++ b/configure
@@ -2848,6 +2848,21 @@ if compile_prog "" "" ; then
     linux_magic_h=yes
 fi
 
+########################################
+# check if environ is declared
+
+has_environ=no
+cat > $TMPC << EOF
+#include <unistd.h>
+int main(void) {
+    environ = environ;
+    return 0;
+}
+EOF
+if compile_prog "" "" ; then
+    has_environ=yes
+fi
+
 ##########################################
 # End of CC checks
 # After here, no more $cc or $ld runs
@@ -3360,6 +3375,10 @@ if test "$linux_magic_h" = "yes" ; then
   echo "CONFIG_LINUX_MAGIC_H=y" >> $config_host_mak
 fi
 
+if test "$has_environ" = "yes" ; then
+  echo "CONFIG_HAS_ENVIRON=y" >> $config_host_mak
+fi
+
 # USB host support
 case "$usb" in
 linux)
diff --git a/docs/usb2.txt b/docs/usb2.txt
index 228aa33ce..d17e3c004 100644
--- a/docs/usb2.txt
+++ b/docs/usb2.txt
@@ -55,6 +55,21 @@ try ...
 ... then use "bus=ehci.0" to assign your usb devices to that bus.
 
 
+xhci controller support
+-----------------------
+
+There also is xhci host controller support available.  It got alot
+less testing than ehci and there are a bunch of known limitations, so
+ehci may work better for you.  On the other hand the xhci hardware
+design is much more virtualization-friendly, thus xhci emulation uses
+less ressources (especially cpu).  If you wanna give xhci a try
+use this to add the host controller ...
+
+    qemu -device nec-usb-xhci,id=xhci
+
+... then use "bus=xhci.0" when assigning usb devices.
+
+
 More USB tips & tricks
 ======================
 
diff --git a/hw/acpi_piix4.c b/hw/acpi_piix4.c
index 368bbe5a9..1fbc3149b 100644
--- a/hw/acpi_piix4.c
+++ b/hw/acpi_piix4.c
@@ -305,6 +305,7 @@ static void acpi_piix_eject_slot(PIIX4PMState *s, unsigned slots)
             if (pc->no_hotplug) {
                 slot_free = false;
             } else {
+                object_unparent(OBJECT(dev));
                 qdev_free(qdev);
             }
         }
diff --git a/hw/es1370.c b/hw/es1370.c
index f19cef31a..573f74736 100644
--- a/hw/es1370.c
+++ b/hw/es1370.c
@@ -410,7 +410,7 @@ static void es1370_update_voices (ES1370State *s, uint32_t ctl, uint32_t sctl)
 
         if ((old_fmt != new_fmt) || (old_freq != new_freq)) {
             d->shift = (new_fmt & 1) + (new_fmt >> 1);
-            ldebug ("channel %d, freq = %d, nchannels %d, fmt %d, shift %d\n",
+            ldebug ("channel %zu, freq = %d, nchannels %d, fmt %d, shift %d\n",
                     i,
                     new_freq,
                     1 << (new_fmt & 1),
@@ -578,7 +578,7 @@ IO_WRITE_PROTO (es1370_writel)
         d++;
     case ES1370_REG_DAC1_SCOUNT:
         d->scount = (val & 0xffff) | (d->scount & ~0xffff);
-        ldebug ("chan %d CURR_SAMP_CT %d, SAMP_CT %d\n",
+        ldebug ("chan %td CURR_SAMP_CT %d, SAMP_CT %d\n",
                 d - &s->chan[0], val >> 16, (val & 0xffff));
         break;
 
@@ -588,7 +588,7 @@ IO_WRITE_PROTO (es1370_writel)
         d++;
     case ES1370_REG_DAC1_FRAMEADR:
         d->frame_addr = val;
-        ldebug ("chan %d frame address %#x\n", d - &s->chan[0], val);
+        ldebug ("chan %td frame address %#x\n", d - &s->chan[0], val);
         break;
 
     case ES1370_REG_PHANTOM_FRAMECNT:
@@ -605,7 +605,7 @@ IO_WRITE_PROTO (es1370_writel)
     case ES1370_REG_DAC1_FRAMECNT:
         d->frame_cnt = val;
         d->leftover = 0;
-        ldebug ("chan %d frame count %d, buffer size %d\n",
+        ldebug ("chan %td frame count %d, buffer size %d\n",
                 d - &s->chan[0], val >> 16, val & 0xffff);
         break;
 
@@ -745,9 +745,10 @@ IO_READ_PROTO (es1370_readl)
         {
             uint32_t size = ((d->frame_cnt & 0xffff) + 1) << 2;
             uint32_t curr = ((d->frame_cnt >> 16) + 1) << 2;
-            if (curr > size)
+            if (curr > size) {
                 dolog ("read framecnt curr %d, size %d %d\n", curr, size,
                        curr > size);
+            }
         }
 #endif
         break;
diff --git a/hw/fdc.c b/hw/fdc.c
index cb4cd25c1..30d34e3f1 100644
--- a/hw/fdc.c
+++ b/hw/fdc.c
@@ -179,12 +179,14 @@ static void fd_revalidate(FDrive *drv)
     FDriveRate rate;
 
     FLOPPY_DPRINTF("revalidate\n");
-    if (drv->bs != NULL && bdrv_is_inserted(drv->bs)) {
+    if (drv->bs != NULL) {
         ro = bdrv_is_read_only(drv->bs);
         bdrv_get_floppy_geometry_hint(drv->bs, &nb_heads, &max_track,
                                       &last_sect, drv->drive, &drive, &rate);
-        if (nb_heads != 0 && max_track != 0 && last_sect != 0) {
-            FLOPPY_DPRINTF("User defined disk (%d %d %d)",
+        if (!bdrv_is_inserted(drv->bs)) {
+            FLOPPY_DPRINTF("No disk in drive\n");
+        } else if (nb_heads != 0 && max_track != 0 && last_sect != 0) {
+            FLOPPY_DPRINTF("User defined disk (%d %d %d)\n",
                            nb_heads - 1, max_track, last_sect);
         } else {
             FLOPPY_DPRINTF("Floppy disk (%d h %d t %d s) %s\n", nb_heads,
@@ -201,7 +203,7 @@ static void fd_revalidate(FDrive *drv)
         drv->drive = drive;
         drv->media_rate = rate;
     } else {
-        FLOPPY_DPRINTF("No disk in drive\n");
+        FLOPPY_DPRINTF("No drive connected\n");
         drv->last_sect = 0;
         drv->max_track = 0;
         drv->flags &= ~FDISK_DBL_SIDES;
@@ -709,7 +711,7 @@ static void fdctrl_raise_irq(FDCtrl *fdctrl, uint8_t status0)
         FDrive *cur_drv;
         /* A seek clears the disk change line (if a disk is inserted) */
         cur_drv = get_cur_drv(fdctrl);
-        if (cur_drv->max_track) {
+        if (cur_drv->bs != NULL && bdrv_is_inserted(cur_drv->bs)) {
             cur_drv->media_changed = 0;
         }
     }
@@ -1878,7 +1880,7 @@ static int fdctrl_connect_drives(FDCtrl *fdctrl)
         }
 
         fd_init(drive);
-        fd_revalidate(drive);
+        fdctrl_change_cb(drive, 0);
         if (drive->bs) {
             bdrv_set_dev_ops(drive->bs, &fdctrl_block_ops, drive);
         }
diff --git a/hw/multiboot.c b/hw/multiboot.c
index b4484a326..b1e04c571 100644
--- a/hw/multiboot.c
+++ b/hw/multiboot.c
@@ -202,10 +202,16 @@ int load_multiboot(void *fw_cfg,
         uint32_t mh_bss_end_addr = ldl_p(header+i+24);
         mh_load_addr = ldl_p(header+i+16);
         uint32_t mb_kernel_text_offset = i - (mh_header_addr - mh_load_addr);
-        uint32_t mb_load_size = mh_load_end_addr - mh_load_addr;
-
+        uint32_t mb_load_size = 0;
         mh_entry_addr = ldl_p(header+i+28);
-        mb_kernel_size = mh_bss_end_addr - mh_load_addr;
+
+        if (mh_load_end_addr) {
+            mb_kernel_size = mh_bss_end_addr - mh_load_addr;
+            mb_load_size = mh_load_end_addr - mh_load_addr;
+        } else {
+            mb_kernel_size = kernel_file_size - mb_kernel_text_offset;
+            mb_load_size = mb_kernel_size;
+        }
 
         /* Valid if mh_flags sets MULTIBOOT_HEADER_HAS_VBE.
         uint32_t mh_mode_type = ldl_p(header+i+32);
diff --git a/hw/pc.c b/hw/pc.c
index bc002f701..dc3193379 100644
--- a/hw/pc.c
+++ b/hw/pc.c
@@ -47,6 +47,7 @@
 #include "ui/qemu-spice.h"
 #include "memory.h"
 #include "exec-memory.h"
+#include "arch_init.h"
 
 /* output Bochs bios info messages */
 //#define DEBUG_BIOS
@@ -382,7 +383,7 @@ void pc_cmos_init(ram_addr_t ram_size, ram_addr_t above_4g_mem_size,
     if (floppy) {
         fdc_get_bs(fd, floppy);
         for (i = 0; i < 2; i++) {
-            if (fd[i] && bdrv_is_inserted(fd[i])) {
+            if (fd[i]) {
                 bdrv_get_floppy_geometry_hint(fd[i], &nb_heads, &max_track,
                                               &last_sect, FDRIVE_DRV_NONE,
                                               &fd_type[i], &rate);
@@ -1101,7 +1102,7 @@ void pc_basic_device_init(ISABus *isa_bus, qemu_irq *gsi,
     qemu_irq pit_alt_irq = NULL;
     qemu_irq rtc_irq = NULL;
     qemu_irq *a20_line;
-    ISADevice *i8042, *port92, *vmmouse, *pit;
+    ISADevice *i8042, *port92, *vmmouse, *pit = NULL;
     qemu_irq *cpu_exit_irq;
 
     register_ioport_write(0x80, 1, 1, ioport80_write, NULL);
@@ -1130,16 +1131,18 @@ void pc_basic_device_init(ISABus *isa_bus, qemu_irq *gsi,
 
     qemu_register_boot_set(pc_boot_set, *rtc_state);
 
-    if (kvm_irqchip_in_kernel()) {
-        pit = kvm_pit_init(isa_bus, 0x40);
-    } else {
-        pit = pit_init(isa_bus, 0x40, pit_isa_irq, pit_alt_irq);
-    }
-    if (hpet) {
-        /* connect PIT to output control line of the HPET */
-        qdev_connect_gpio_out(hpet, 0, qdev_get_gpio_in(&pit->qdev, 0));
+    if (!xen_enabled()) {
+        if (kvm_irqchip_in_kernel()) {
+            pit = kvm_pit_init(isa_bus, 0x40);
+        } else {
+            pit = pit_init(isa_bus, 0x40, pit_isa_irq, pit_alt_irq);
+        }
+        if (hpet) {
+            /* connect PIT to output control line of the HPET */
+            qdev_connect_gpio_out(hpet, 0, qdev_get_gpio_in(&pit->qdev, 0));
+        }
+        pcspk_init(isa_bus, pit);
     }
-    pcspk_init(isa_bus, pit);
 
     for(i = 0; i < MAX_SERIAL_PORTS; i++) {
         if (serial_hds[i]) {
diff --git a/hw/pci.c b/hw/pci.c
index 68e5232ed..e4fefb311 100644
--- a/hw/pci.c
+++ b/hw/pci.c
@@ -1622,7 +1622,6 @@ static int pci_unplug_device(DeviceState *qdev)
         qerror_report(QERR_DEVICE_NO_HOTPLUG, object_get_typename(OBJECT(dev)));
         return -1;
     }
-    object_unparent(OBJECT(dev));
     return dev->bus->hotplug(dev->bus->hotplug_qdev, dev,
                              PCI_HOTPLUG_DISABLED);
 }
diff --git a/hw/scsi-bus.c b/hw/scsi-bus.c
index 8ab9bcda8..f10f3ec25 100644
--- a/hw/scsi-bus.c
+++ b/hw/scsi-bus.c
@@ -1561,7 +1561,7 @@ static int get_scsi_requests(QEMUFile *f, void *pv, size_t size)
     return 0;
 }
 
-const VMStateInfo vmstate_info_scsi_requests = {
+static const VMStateInfo vmstate_info_scsi_requests = {
     .name = "scsi-requests",
     .get  = get_scsi_requests,
     .put  = put_scsi_requests,
diff --git a/hw/vga.c b/hw/vga.c
index 5824f85d0..d784df7df 100644
--- a/hw/vga.c
+++ b/hw/vga.c
@@ -2357,10 +2357,15 @@ void vga_init(VGACommonState *s, MemoryRegion *address_space,
 void vga_init_vbe(VGACommonState *s, MemoryRegion *system_memory)
 {
 #ifdef CONFIG_BOCHS_VBE
+    /* With pc-0.12 and below we map both the PCI BAR and the fixed VBE region,
+     * so use an alias to avoid double-mapping the same region.
+     */
+    memory_region_init_alias(&s->vram_vbe, "vram.vbe",
+                             &s->vram, 0, memory_region_size(&s->vram));
     /* XXX: use optimized standard vga accesses */
     memory_region_add_subregion(system_memory,
                                 VBE_DISPI_LFB_PHYSICAL_ADDRESS,
-                                &s->vram);
+                                &s->vram_vbe);
     s->vbe_mapped = 1;
 #endif 
 }
diff --git a/hw/vga_int.h b/hw/vga_int.h
index 9bf9e8f72..6f696b69b 100644
--- a/hw/vga_int.h
+++ b/hw/vga_int.h
@@ -105,6 +105,7 @@ typedef struct VGACommonState {
     MemoryRegion *legacy_address_space;
     uint8_t *vram_ptr;
     MemoryRegion vram;
+    MemoryRegion vram_vbe;
     uint32_t vram_size;
     uint32_t latch;
     MemoryRegion *chain4_alias;
diff --git a/hw/xen_common.h b/hw/xen_common.h
index 7043c14ca..fe7f227f9 100644
--- a/hw/xen_common.h
+++ b/hw/xen_common.h
@@ -148,6 +148,6 @@ static inline int xen_xc_hvm_inject_msi(XenXC xen_xc, domid_t dom,
 }
 #endif
 
-void destroy_hvm_domain(void);
+void destroy_hvm_domain(bool reboot);
 
 #endif /* QEMU_HW_XEN_COMMON_H */
diff --git a/hw/xen_disk.c b/hw/xen_disk.c
index 22dbd1030..07594bc0c 100644
--- a/hw/xen_disk.c
+++ b/hw/xen_disk.c
@@ -48,7 +48,6 @@
 
 /* ------------------------------------------------------------- */
 
-static int syncwrite    = 0;
 static int batch_maps   = 0;
 
 static int max_requests = 32;
@@ -67,6 +66,7 @@ struct ioreq {
     QEMUIOVector        v;
     int                 presync;
     int                 postsync;
+    uint8_t             mapped;
 
     /* grant mapping */
     uint32_t            domids[BLKIF_MAX_SEGMENTS_PER_REQUEST];
@@ -154,7 +154,7 @@ static void ioreq_finish(struct ioreq *ioreq)
     blkdev->requests_finished++;
 }
 
-static void ioreq_release(struct ioreq *ioreq)
+static void ioreq_release(struct ioreq *ioreq, bool finish)
 {
     struct XenBlkDev *blkdev = ioreq->blkdev;
 
@@ -162,7 +162,11 @@ static void ioreq_release(struct ioreq *ioreq)
     memset(ioreq, 0, sizeof(*ioreq));
     ioreq->blkdev = blkdev;
     QLIST_INSERT_HEAD(&blkdev->freelist, ioreq, list);
-    blkdev->requests_finished--;
+    if (finish) {
+        blkdev->requests_finished--;
+    } else {
+        blkdev->requests_inflight--;
+    }
 }
 
 /*
@@ -189,15 +193,10 @@ static int ioreq_parse(struct ioreq *ioreq)
             ioreq->presync = 1;
             return 0;
         }
-        if (!syncwrite) {
-            ioreq->presync = ioreq->postsync = 1;
-        }
+        ioreq->presync = ioreq->postsync = 1;
         /* fall through */
     case BLKIF_OP_WRITE:
         ioreq->prot = PROT_READ; /* from memory */
-        if (syncwrite) {
-            ioreq->postsync = 1;
-        }
         break;
     default:
         xen_be_printf(&blkdev->xendev, 0, "error: unknown operation (%d)\n",
@@ -248,7 +247,7 @@ static void ioreq_unmap(struct ioreq *ioreq)
     XenGnttab gnt = ioreq->blkdev->xendev.gnttabdev;
     int i;
 
-    if (ioreq->v.niov == 0) {
+    if (ioreq->v.niov == 0 || ioreq->mapped == 0) {
         return;
     }
     if (batch_maps) {
@@ -274,6 +273,7 @@ static void ioreq_unmap(struct ioreq *ioreq)
             ioreq->page[i] = NULL;
         }
     }
+    ioreq->mapped = 0;
 }
 
 static int ioreq_map(struct ioreq *ioreq)
@@ -281,7 +281,7 @@ static int ioreq_map(struct ioreq *ioreq)
     XenGnttab gnt = ioreq->blkdev->xendev.gnttabdev;
     int i;
 
-    if (ioreq->v.niov == 0) {
+    if (ioreq->v.niov == 0 || ioreq->mapped == 1) {
         return 0;
     }
     if (batch_maps) {
@@ -313,9 +313,12 @@ static int ioreq_map(struct ioreq *ioreq)
             ioreq->blkdev->cnt_map++;
         }
     }
+    ioreq->mapped = 1;
     return 0;
 }
 
+static int ioreq_runio_qemu_aio(struct ioreq *ioreq);
+
 static void qemu_aio_complete(void *opaque, int ret)
 {
     struct ioreq *ioreq = opaque;
@@ -327,11 +330,19 @@ static void qemu_aio_complete(void *opaque, int ret)
     }
 
     ioreq->aio_inflight--;
+    if (ioreq->presync) {
+        ioreq->presync = 0;
+        ioreq_runio_qemu_aio(ioreq);
+        return;
+    }
     if (ioreq->aio_inflight > 0) {
         return;
     }
     if (ioreq->postsync) {
-        bdrv_flush(ioreq->blkdev->bs);
+        ioreq->postsync = 0;
+        ioreq->aio_inflight++;
+        bdrv_aio_flush(ioreq->blkdev->bs, qemu_aio_complete, ioreq);
+        return;
     }
 
     ioreq->status = ioreq->aio_errors ? BLKIF_RSP_ERROR : BLKIF_RSP_OKAY;
@@ -351,7 +362,8 @@ static int ioreq_runio_qemu_aio(struct ioreq *ioreq)
 
     ioreq->aio_inflight++;
     if (ioreq->presync) {
-        bdrv_flush(blkdev->bs); /* FIXME: aio_flush() ??? */
+        bdrv_aio_flush(ioreq->blkdev->bs, qemu_aio_complete, ioreq);
+        return 0;
     }
 
     switch (ioreq->req.operation) {
@@ -449,7 +461,7 @@ static void blk_send_response_all(struct XenBlkDev *blkdev)
     while (!QLIST_EMPTY(&blkdev->finished)) {
         ioreq = QLIST_FIRST(&blkdev->finished);
         send_notify += blk_send_response_one(ioreq);
-        ioreq_release(ioreq);
+        ioreq_release(ioreq, true);
     }
     if (send_notify) {
         xen_be_send_notify(&blkdev->xendev);
@@ -505,7 +517,7 @@ static void blk_handle_requests(struct XenBlkDev *blkdev)
             if (blk_send_response_one(ioreq)) {
                 xen_be_send_notify(&blkdev->xendev);
             }
-            ioreq_release(ioreq);
+            ioreq_release(ioreq, false);
             continue;
         }
 
diff --git a/pc-bios/README b/pc-bios/README
index 6b64d6868..e56e9e5f0 100644
--- a/pc-bios/README
+++ b/pc-bios/README
@@ -12,7 +12,7 @@
   1275-1994 (referred to as Open Firmware) compliant firmware.
   The included images for PowerPC (for 32 and 64 bit PPC CPUs),
   Sparc32 and Sparc64 are built from OpenBIOS SVN revision
-  1056.
+  1060.
 
 - SLOF (Slimline Open Firmware) is a free IEEE 1275 Open Firmware
   implementation for certain IBM POWER hardware.  The sources are at
diff --git a/pc-bios/openbios-ppc b/pc-bios/openbios-ppc
index d4656db8b..aeae26588 100644
--- a/pc-bios/openbios-ppc
+++ b/pc-bios/openbios-ppc
diff --git a/pc-bios/openbios-sparc32 b/pc-bios/openbios-sparc32
index 4312c690a..d90c4e59a 100644
--- a/pc-bios/openbios-sparc32
+++ b/pc-bios/openbios-sparc32
diff --git a/pc-bios/openbios-sparc64 b/pc-bios/openbios-sparc64
index b18610508..457d26422 100644
--- a/pc-bios/openbios-sparc64
+++ b/pc-bios/openbios-sparc64
diff --git a/qemu-img.texi b/qemu-img.texi
index b2ca3a542..6fc3c28e0 100644
--- a/qemu-img.texi
+++ b/qemu-img.texi
@@ -159,6 +159,24 @@ It can be used without an accessible old backing file, i.e. you can use it to
 fix an image whose backing file has already been moved/renamed.
 @end table
 
+You can use @code{rebase} to perform a ``diff'' operation on two
+disk images.  This can be useful when you have copied or cloned
+a guest, and you want to get back to a thin image on top of a
+template or base image.
+
+Say that @code{base.img} has been cloned as @code{modified.img} by
+copying it, and that the @code{modified.img} guest has run so there
+are now some changes compared to @code{base.img}.  To construct a thin
+image called @code{diff.qcow2} that contains just the differences, do:
+
+@example
+qemu-img create -f qcow2 -b modified.img diff.qcow2
+qemu-img rebase -b base.img diff.qcow2
+@end example
+
+At this point, @code{modified.img} can be discarded, since
+@code{base.img + diff.qcow2} contains the same information.
+
 @item resize @var{filename} [+ | -]@var{size}
 
 Change the disk image as if it had been created with @var{size}.
diff --git a/qga/commands-posix.c b/qga/commands-posix.c
index 7664be10a..00d035da9 100644
--- a/qga/commands-posix.c
+++ b/qga/commands-posix.c
@@ -14,12 +14,22 @@
 #include <glib.h>
 #include <sys/types.h>
 #include <sys/ioctl.h>
+#include <sys/wait.h>
 #include "qga/guest-agent-core.h"
 #include "qga-qmp-commands.h"
 #include "qerror.h"
 #include "qemu-queue.h"
 #include "host-utils.h"
 
+#ifndef CONFIG_HAS_ENVIRON
+#ifdef __APPLE__
+#include <crt_externs.h>
+#define environ (*_NSGetEnviron())
+#else
+extern char **environ;
+#endif
+#endif
+
 #if defined(__linux__)
 #include <mntent.h>
 #include <linux/fs.h>
@@ -27,7 +37,6 @@
 #include <arpa/inet.h>
 #include <sys/socket.h>
 #include <net/if.h>
-#include <sys/wait.h>
 
 #if defined(__linux__) && defined(FIFREEZE)
 #define CONFIG_FSFREEZE
@@ -336,7 +345,7 @@ static int guest_fsfreeze_build_mount_list(GuestFsfreezeMountList *mounts)
 {
     struct mntent *ment;
     GuestFsfreezeMount *mount;
-    char const *mtab = MOUNTED;
+    char const *mtab = "/proc/self/mounts";
     FILE *fp;
 
     fp = setmntent(mtab, "r");
diff --git a/roms/openbios b/roms/openbios
-Subproject ff61d973e5a4a68b29e485b3f88e6a2d1d96cf4
+Subproject d1d2787f87167edf487a60e61b9168514d5a743
diff --git a/slirp/ip.h b/slirp/ip.h
index 88c903fcc..e2ee5e304 100644
--- a/slirp/ip.h
+++ b/slirp/ip.h
@@ -34,18 +34,14 @@
 #define _IP_H_
 
 #ifdef HOST_WORDS_BIGENDIAN
-# ifndef NTOHL
-#  define NTOHL(d)
-# endif
-# ifndef NTOHS
-#  define NTOHS(d)
-# endif
-# ifndef HTONL
-#  define HTONL(d)
-# endif
-# ifndef HTONS
-#  define HTONS(d)
-# endif
+# undef NTOHL
+# undef NTOHS
+# undef HTONL
+# undef HTONS
+# define NTOHL(d)
+# define NTOHS(d)
+# define HTONL(d)
+# define HTONS(d)
 #else
 # ifndef NTOHL
 #  define NTOHL(d) ((d) = ntohl((d)))
diff --git a/slirp/tcp.h b/slirp/tcp.h
index 82996031e..2e2b4033a 100644
--- a/slirp/tcp.h
+++ b/slirp/tcp.h
@@ -79,20 +79,23 @@ struct tcphdr {
 #define	TCPOPT_EOL		0
 #define	TCPOPT_NOP		1
 #define	TCPOPT_MAXSEG		2
-#define    TCPOLEN_MAXSEG		4
 #define TCPOPT_WINDOW		3
-#define    TCPOLEN_WINDOW		3
 #define TCPOPT_SACK_PERMITTED	4		/* Experimental */
-#define    TCPOLEN_SACK_PERMITTED	2
 #define TCPOPT_SACK		5		/* Experimental */
 #define TCPOPT_TIMESTAMP	8
-#define    TCPOLEN_TIMESTAMP		10
-#define    TCPOLEN_TSTAMP_APPA		(TCPOLEN_TIMESTAMP+2) /* appendix A */
 
 #define TCPOPT_TSTAMP_HDR	\
     (TCPOPT_NOP<<24|TCPOPT_NOP<<16|TCPOPT_TIMESTAMP<<8|TCPOLEN_TIMESTAMP)
 #endif
 
+#ifndef TCPOLEN_MAXSEG
+#define    TCPOLEN_MAXSEG		4
+#define    TCPOLEN_WINDOW		3
+#define    TCPOLEN_SACK_PERMITTED	2
+#define    TCPOLEN_TIMESTAMP		10
+#define    TCPOLEN_TSTAMP_APPA		(TCPOLEN_TIMESTAMP+2) /* appendix A */
+#endif
+
 /*
  * Default maximum segment size for TCP.
  * With an IP MSS of 576, this is 536,
diff --git a/slirp/tcp_output.c b/slirp/tcp_output.c
index 779314bf9..8aa3d9047 100644
--- a/slirp/tcp_output.c
+++ b/slirp/tcp_output.c
@@ -47,6 +47,7 @@ static const u_char  tcp_outflags[TCP_NSTATES] = {
 };
 
 
+#undef MAX_TCPOPTLEN
 #define MAX_TCPOPTLEN	32	/* max # bytes that go in options */
 
 /*
diff --git a/target-i386/cpu.c b/target-i386/cpu.c
index 89b4ac7ec..388bc5c52 100644
--- a/target-i386/cpu.c
+++ b/target-i386/cpu.c
@@ -238,6 +238,8 @@ typedef struct x86_def_t {
     /* Store the results of Centaur's CPUID instructions */
     uint32_t ext4_features;
     uint32_t xlevel2;
+    /* The feature bits on CPUID[EAX=7,ECX=0].EBX */
+    uint32_t cpuid_7_0_ebx_features;
 } x86_def_t;
 
 #define I486_FEATURES (CPUID_FP87 | CPUID_VME | CPUID_PSE)
@@ -521,6 +523,12 @@ static int cpu_x86_fill_host(x86_def_t *x86_cpu_def)
     x86_cpu_def->ext_features = ecx;
     x86_cpu_def->features = edx;
 
+    if (kvm_enabled() && x86_cpu_def->level >= 7) {
+        x86_cpu_def->cpuid_7_0_ebx_features = kvm_arch_get_supported_cpuid(kvm_state, 0x7, 0, R_EBX);
+    } else {
+        x86_cpu_def->cpuid_7_0_ebx_features = 0;
+    }
+
     host_cpuid(0x80000000, 0, &eax, &ebx, &ecx, &edx);
     x86_cpu_def->xlevel = eax;
 
@@ -1185,6 +1193,7 @@ int cpu_x86_register(X86CPU *cpu, const char *cpu_model)
     env->cpuid_kvm_features = def->kvm_features;
     env->cpuid_svm_features = def->svm_features;
     env->cpuid_ext4_features = def->ext4_features;
+    env->cpuid_7_0_ebx = def->cpuid_7_0_ebx_features;
     env->cpuid_xlevel2 = def->xlevel2;
     object_property_set_int(OBJECT(cpu), (int64_t)def->tsc_khz * 1000,
                             "tsc-frequency", &error);
@@ -1451,13 +1460,12 @@ void cpu_x86_cpuid(CPUX86State *env, uint32_t index, uint32_t count,
         *edx = 0;
         break;
     case 7:
-        if (kvm_enabled()) {
-            KVMState *s = env->kvm_state;
-
-            *eax = kvm_arch_get_supported_cpuid(s, 0x7, count, R_EAX);
-            *ebx = kvm_arch_get_supported_cpuid(s, 0x7, count, R_EBX);
-            *ecx = kvm_arch_get_supported_cpuid(s, 0x7, count, R_ECX);
-            *edx = kvm_arch_get_supported_cpuid(s, 0x7, count, R_EDX);
+        /* Structured Extended Feature Flags Enumeration Leaf */
+        if (count == 0) {
+            *eax = 0; /* Maximum ECX value for sub-leaves */
+            *ebx = env->cpuid_7_0_ebx; /* Feature flags */
+            *ecx = 0; /* Reserved */
+            *edx = 0; /* Reserved */
         } else {
             *eax = 0;
             *ebx = 0;
diff --git a/target-i386/cpu.h b/target-i386/cpu.h
index 57e5682c1..0ea47b5ed 100644
--- a/target-i386/cpu.h
+++ b/target-i386/cpu.h
@@ -741,6 +741,8 @@ typedef struct CPUX86State {
     /* Store the results of Centaur's CPUID instructions */
     uint32_t cpuid_xlevel2;
     uint32_t cpuid_ext4_features;
+    /* Flags from CPUID[EAX=7,ECX=0].EBX */
+    uint32_t cpuid_7_0_ebx;
 
     /* MTRRs */
     uint64_t mtrr_fixed[11];
diff --git a/tcg/ppc/tcg-target.c b/tcg/ppc/tcg-target.c
index 4cde48d2f..d26569715 100644
--- a/tcg/ppc/tcg-target.c
+++ b/tcg/ppc/tcg-target.c
@@ -24,7 +24,11 @@
 
 static uint8_t *tb_ret_addr;
 
-#ifdef _CALL_DARWIN
+#if defined _CALL_DARWIN || defined __APPLE__
+#define TCG_TARGET_CALL_DARWIN
+#endif
+
+#ifdef TCG_TARGET_CALL_DARWIN
 #define LINKAGE_AREA_SIZE 24
 #define LR_OFFSET 8
 #elif defined _CALL_AIX
@@ -99,7 +103,7 @@ static const int tcg_target_reg_alloc_order[] = {
     TCG_REG_R29,
     TCG_REG_R30,
     TCG_REG_R31,
-#ifdef _CALL_DARWIN
+#ifdef TCG_TARGET_CALL_DARWIN
     TCG_REG_R2,
 #endif
     TCG_REG_R3,
@@ -110,7 +114,7 @@ static const int tcg_target_reg_alloc_order[] = {
     TCG_REG_R8,
     TCG_REG_R9,
     TCG_REG_R10,
-#ifndef _CALL_DARWIN
+#ifndef TCG_TARGET_CALL_DARWIN
     TCG_REG_R11,
 #endif
     TCG_REG_R12,
@@ -140,7 +144,7 @@ static const int tcg_target_call_oarg_regs[2] = {
 };
 
 static const int tcg_target_callee_save_regs[] = {
-#ifdef _CALL_DARWIN
+#ifdef TCG_TARGET_CALL_DARWIN
     TCG_REG_R11,
     TCG_REG_R13,
 #endif
@@ -1965,7 +1969,7 @@ static void tcg_target_init(TCGContext *s)
     tcg_regset_set32(tcg_target_available_regs[TCG_TYPE_I32], 0, 0xffffffff);
     tcg_regset_set32(tcg_target_call_clobber_regs, 0,
                      (1 << TCG_REG_R0) |
-#ifdef _CALL_DARWIN
+#ifdef TCG_TARGET_CALL_DARWIN
                      (1 << TCG_REG_R2) |
 #endif
                      (1 << TCG_REG_R3) |
@@ -1983,7 +1987,7 @@ static void tcg_target_init(TCGContext *s)
     tcg_regset_clear(s->reserved_regs);
     tcg_regset_set_reg(s->reserved_regs, TCG_REG_R0);
     tcg_regset_set_reg(s->reserved_regs, TCG_REG_R1);
-#ifndef _CALL_DARWIN
+#ifndef TCG_TARGET_CALL_DARWIN
     tcg_regset_set_reg(s->reserved_regs, TCG_REG_R2);
 #endif
 #ifdef _CALL_SYSV
diff --git a/tests/fdc-test.c b/tests/fdc-test.c
index 5b5dd7481..22d24ac7d 100644
--- a/tests/fdc-test.c
+++ b/tests/fdc-test.c
@@ -63,6 +63,12 @@ char test_image[] = "/tmp/qtest.XXXXXX";
 #define assert_bit_set(data, mask) g_assert_cmphex((data) & (mask), ==, (mask))
 #define assert_bit_clear(data, mask) g_assert_cmphex((data) & (mask), ==, 0)
 
+static uint8_t base = 0x70;
+
+enum {
+    CMOS_FLOPPY     = 0x10,
+};
+
 static void floppy_send(uint8_t byte)
 {
     uint8_t msr;
@@ -108,34 +114,43 @@ static void send_step_pulse(void)
     cyl = (cyl + 1) % 4;
 }
 
-static void test_media_change(void)
+static uint8_t cmos_read(uint8_t reg)
 {
-    uint8_t dir;
+    outb(base + 0, reg);
+    return inb(base + 1);
+}
 
-    /* Media changed bit must be up-to-date after step pulse. Do two SEEKs
-     * because we may already happen to be on the right cylinder initially. */
-    send_step_pulse();
-    send_step_pulse();
-    dir = inb(FLOPPY_BASE + reg_dir);
-    assert_bit_clear(dir, DSKCHG);
+static void test_cmos(void)
+{
+    uint8_t cmos;
 
-    /* Eject the floppy and check that DSKCHG is set. Reading it out doesn't
-     * reset the bit. */
-    qmp("{'execute':'eject', 'arguments':{ 'device':'floppy0' }}");
-    qmp(""); /* ignore event */
+    cmos = cmos_read(CMOS_FLOPPY);
+    g_assert(cmos == 0x40);
+}
 
+static void test_no_media_on_start(void)
+{
+    uint8_t dir;
+
+    /* Media changed bit must be set all time after start if there is
+     * no media in drive. */
     dir = inb(FLOPPY_BASE + reg_dir);
     assert_bit_set(dir, DSKCHG);
     dir = inb(FLOPPY_BASE + reg_dir);
     assert_bit_set(dir, DSKCHG);
-
+    send_step_pulse();
     send_step_pulse();
     dir = inb(FLOPPY_BASE + reg_dir);
     assert_bit_set(dir, DSKCHG);
     dir = inb(FLOPPY_BASE + reg_dir);
     assert_bit_set(dir, DSKCHG);
+}
+
+static void test_media_change(void)
+{
+    uint8_t dir;
 
-    /* And then insert it again. DSKCHK should not be reset until a step pulse
+    /* Insert media in drive. DSKCHK should not be reset until a step pulse
      * is sent. */
     qmp("{'execute':'change', 'arguments':{ 'device':'floppy0', "
         "'target': '%s' }}", test_image);
@@ -152,6 +167,22 @@ static void test_media_change(void)
     assert_bit_clear(dir, DSKCHG);
     dir = inb(FLOPPY_BASE + reg_dir);
     assert_bit_clear(dir, DSKCHG);
+
+    /* Eject the floppy and check that DSKCHG is set. Reading it out doesn't
+     * reset the bit. */
+    qmp("{'execute':'eject', 'arguments':{ 'device':'floppy0' }}");
+    qmp(""); /* ignore event */
+
+    dir = inb(FLOPPY_BASE + reg_dir);
+    assert_bit_set(dir, DSKCHG);
+    dir = inb(FLOPPY_BASE + reg_dir);
+    assert_bit_set(dir, DSKCHG);
+
+    send_step_pulse();
+    dir = inb(FLOPPY_BASE + reg_dir);
+    assert_bit_set(dir, DSKCHG);
+    dir = inb(FLOPPY_BASE + reg_dir);
+    assert_bit_set(dir, DSKCHG);
 }
 
 int main(int argc, char **argv)
@@ -177,12 +208,12 @@ int main(int argc, char **argv)
     /* Run the tests */
     g_test_init(&argc, &argv, NULL);
 
-    cmdline = g_strdup_printf("-vnc none "
-        "-drive file=%s,if=floppy,cache=writeback ",
-        test_image);
+    cmdline = g_strdup_printf("-vnc none ");
 
     qtest_start(cmdline);
     qtest_irq_intercept_in(global_qtest, "ioapic");
+    qtest_add_func("/fdc/cmos", test_cmos);
+    qtest_add_func("/fdc/no_media_on_start", test_no_media_on_start);
     qtest_add_func("/fdc/media_change", test_media_change);
 
     ret = g_test_run();
diff --git a/tests/qemu-iotests/035 b/tests/qemu-iotests/035
index 56616a1b7..9d2d3472e 100755
--- a/tests/qemu-iotests/035
+++ b/tests/qemu-iotests/035
@@ -39,7 +39,7 @@ trap "_cleanup; exit \$status" 0 1 2 3 15
 . ./common.rc
 . ./common.filter
 
-_supported_fmt generic
+_supported_fmt qcow2
 _supported_proto generic
 _supported_os Linux
 
diff --git a/trace-events b/trace-events
index 87cb96cab..45c6bc127 100644
--- a/trace-events
+++ b/trace-events
@@ -602,9 +602,9 @@ escc_kbd_command(int val) "Command %d"
 escc_sunmouse_event(int dx, int dy, int buttons_state) "dx=%d dy=%d buttons=%01x"
 
 # block/iscsi.c
-iscsi_aio_write10_cb(void *iscsi, int status, void *acb, int canceled) "iscsi %p status %d acb %p canceled %d"
+iscsi_aio_write16_cb(void *iscsi, int status, void *acb, int canceled) "iscsi %p status %d acb %p canceled %d"
 iscsi_aio_writev(void *iscsi, int64_t sector_num, int nb_sectors, void *opaque, void *acb) "iscsi %p sector_num %"PRId64" nb_sectors %d opaque %p acb %p"
-iscsi_aio_read10_cb(void *iscsi, int status, void *acb, int canceled) "iscsi %p status %d acb %p canceled %d"
+iscsi_aio_read16_cb(void *iscsi, int status, void *acb, int canceled) "iscsi %p status %d acb %p canceled %d"
 iscsi_aio_readv(void *iscsi, int64_t sector_num, int nb_sectors, void *opaque, void *acb) "iscsi %p sector_num %"PRId64" nb_sectors %d opaque %p acb %p"
 
 # hw/esp.c
diff --git a/ui/cocoa.m b/ui/cocoa.m
index e7d6e898e..2383646dc 100644
--- a/ui/cocoa.m
+++ b/ui/cocoa.m
@@ -879,7 +879,8 @@ int main (int argc, const char * argv[]) {
                 !strcmp(opt, "-vnc") ||
                 !strcmp(opt, "-nographic") ||
                 !strcmp(opt, "-version") ||
-                !strcmp(opt, "-curses")) {
+                !strcmp(opt, "-curses") ||
+                !strcmp(opt, "-qtest")) {
                 return qemu_main(gArgc, gArgv, *_NSGetEnviron());
             }
         }
diff --git a/ui/vnc.c b/ui/vnc.c
index be384a531..54bc5adab 100644
--- a/ui/vnc.c
+++ b/ui/vnc.c
@@ -2849,6 +2849,10 @@ int vnc_display_pw_expire(DisplayState *ds, time_t expires)
 {
     VncDisplay *vs = ds ? (VncDisplay *)ds->opaque : vnc_display;
 
+    if (!vs) {
+        return -EINVAL;
+    }
+
     vs->expires = expires;
     return 0;
 }
diff --git a/xen-all.c b/xen-all.c
index bdf9c0fc7..b5220cc6a 100644
--- a/xen-all.c
+++ b/xen-all.c
@@ -603,6 +603,10 @@ void xen_vcpu_init(void)
         qemu_register_reset(xen_reset_vcpu, first_cpu);
         xen_reset_vcpu(first_cpu);
     }
+    /* if rtc_clock is left to default (host_clock), disable it */
+    if (rtc_clock == host_clock) {
+        qemu_clock_enable(rtc_clock, false);
+    }
 }
 
 /* get the ioreq packets from share mem */
@@ -856,7 +860,7 @@ static void cpu_handle_ioreq(void *opaque)
                     "data: %"PRIx64", count: %" FMT_ioreq_size ", size: %" FMT_ioreq_size "\n",
                     req->state, req->data_is_ptr, req->addr,
                     req->data, req->count, req->size);
-            destroy_hvm_domain();
+            destroy_hvm_domain(false);
             return;
         }
 
@@ -870,10 +874,11 @@ static void cpu_handle_ioreq(void *opaque)
          */
         if (runstate_is_running()) {
             if (qemu_shutdown_requested_get()) {
-                destroy_hvm_domain();
+                destroy_hvm_domain(false);
             }
             if (qemu_reset_requested_get()) {
                 qemu_system_reset(VMRESET_REPORT);
+                destroy_hvm_domain(true);
             }
         }
 
@@ -1159,7 +1164,7 @@ int xen_hvm_init(void)
     return 0;
 }
 
-void destroy_hvm_domain(void)
+void destroy_hvm_domain(bool reboot)
 {
     XenXC xc_handle;
     int sts;
@@ -1168,12 +1173,15 @@ void destroy_hvm_domain(void)
     if (xc_handle == XC_HANDLER_INITIAL_VALUE) {
         fprintf(stderr, "Cannot acquire xenctrl handle\n");
     } else {
-        sts = xc_domain_shutdown(xc_handle, xen_domid, SHUTDOWN_poweroff);
+        sts = xc_domain_shutdown(xc_handle, xen_domid,
+                                 reboot ? SHUTDOWN_reboot : SHUTDOWN_poweroff);
         if (sts != 0) {
-            fprintf(stderr, "? xc_domain_shutdown failed to issue poweroff, "
-                    "sts %d, %s\n", sts, strerror(errno));
+            fprintf(stderr, "xc_domain_shutdown failed to issue %s, "
+                    "sts %d, %s\n", reboot ? "reboot" : "poweroff",
+                    sts, strerror(errno));
         } else {
-            fprintf(stderr, "Issued domain %d poweroff\n", xen_domid);
+            fprintf(stderr, "Issued domain %d %s\n", xen_domid,
+                    reboot ? "reboot" : "poweroff");
         }
         xc_interface_close(xc_handle);
     }