diff --git a/configure b/configure
index d2fc346302..cef51b2a0b 100755
--- a/configure
+++ b/configure
@@ -1745,7 +1745,7 @@ disabled with --disable-FEATURE, default is enabled if available:
   gcrypt          libgcrypt cryptography support
   auth-pam        PAM access control
   sdl             SDL UI
-  sdl_image       SDL Image support for icons
+  sdl-image       SDL Image support for icons
   gtk             gtk UI
   vte             vte support for the gtk UI
   curses          curses UI
diff --git a/hw/pci/msix.c b/hw/pci/msix.c
index 4e336416a7..d39dcf32e8 100644
--- a/hw/pci/msix.c
+++ b/hw/pci/msix.c
@@ -24,8 +24,6 @@
 #include "qapi/error.h"
 #include "trace.h"
 
-#define MSIX_CAP_LENGTH 12
-
 /* MSI enable bit and maskall bit are in byte 1 in FLAGS register */
 #define MSIX_CONTROL_OFFSET (PCI_MSIX_FLAGS + 1)
 #define MSIX_ENABLE_MASK (PCI_MSIX_FLAGS_ENABLE >> 8)
diff --git a/hw/vfio/amd-xgbe.c b/hw/vfio/amd-xgbe.c
index ee64a3b4a2..1b06c0f3ea 100644
--- a/hw/vfio/amd-xgbe.c
+++ b/hw/vfio/amd-xgbe.c
@@ -26,7 +26,7 @@ static void amd_xgbe_realize(DeviceState *dev, Error **errp)
 }
 
 static const VMStateDescription vfio_platform_amd_xgbe_vmstate = {
-    .name = TYPE_VFIO_AMD_XGBE,
+    .name = "vfio-amd-xgbe",
     .unmigratable = 1,
 };
 
diff --git a/hw/vfio/ap.c b/hw/vfio/ap.c
index d8b79ebe53..564751650f 100644
--- a/hw/vfio/ap.c
+++ b/hw/vfio/ap.c
@@ -155,7 +155,7 @@ static void vfio_ap_reset(DeviceState *dev)
 }
 
 static const VMStateDescription vfio_ap_vmstate = {
-    .name = VFIO_AP_DEVICE_TYPE,
+    .name = "vfio-ap",
     .unmigratable = 1,
 };
 
diff --git a/hw/vfio/calxeda-xgmac.c b/hw/vfio/calxeda-xgmac.c
index e7767c4b02..6cc608b6ca 100644
--- a/hw/vfio/calxeda-xgmac.c
+++ b/hw/vfio/calxeda-xgmac.c
@@ -26,7 +26,7 @@ static void calxeda_xgmac_realize(DeviceState *dev, Error **errp)
 }
 
 static const VMStateDescription vfio_platform_calxeda_xgmac_vmstate = {
-    .name = TYPE_VFIO_CALXEDA_XGMAC,
+    .name = "vfio-calxeda-xgmac",
     .unmigratable = 1,
 };
 
diff --git a/hw/vfio/ccw.c b/hw/vfio/ccw.c
index 31dd3a2a87..d9e39552e2 100644
--- a/hw/vfio/ccw.c
+++ b/hw/vfio/ccw.c
@@ -468,7 +468,7 @@ static Property vfio_ccw_properties[] = {
 };
 
 static const VMStateDescription vfio_ccw_vmstate = {
-    .name = TYPE_VFIO_CCW,
+    .name = "vfio-ccw",
     .unmigratable = 1,
 };
 
diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c
index 8cecb53d5c..8e555db12e 100644
--- a/hw/vfio/pci.c
+++ b/hw/vfio/pci.c
@@ -35,11 +35,11 @@
 #include "trace.h"
 #include "qapi/error.h"
 
-#define MSIX_CAP_LENGTH 12
-
 #define TYPE_VFIO_PCI "vfio-pci"
 #define PCI_VFIO(obj)    OBJECT_CHECK(VFIOPCIDevice, obj, TYPE_VFIO_PCI)
 
+#define TYPE_VIFO_PCI_NOHOTPLUG "vfio-pci-nohotplug"
+
 static void vfio_disable_interrupts(VFIOPCIDevice *vdev);
 static void vfio_mmap_set_enabled(VFIOPCIDevice *vdev, bool enabled);
 
@@ -3304,8 +3304,8 @@ static void vfio_pci_nohotplug_dev_class_init(ObjectClass *klass, void *data)
 }
 
 static const TypeInfo vfio_pci_nohotplug_dev_info = {
-    .name = "vfio-pci-nohotplug",
-    .parent = "vfio-pci",
+    .name = TYPE_VIFO_PCI_NOHOTPLUG,
+    .parent = TYPE_VFIO_PCI,
     .instance_size = sizeof(VFIOPCIDevice),
     .class_init = vfio_pci_nohotplug_dev_class_init,
 };
diff --git a/hw/vfio/platform.c b/hw/vfio/platform.c
index 398db38f14..d52d6552e0 100644
--- a/hw/vfio/platform.c
+++ b/hw/vfio/platform.c
@@ -72,7 +72,7 @@ static VFIOINTp *vfio_init_intp(VFIODevice *vbasedev,
         g_free(intp->interrupt);
         g_free(intp);
         error_setg_errno(errp, -ret,
-                         "failed to initialize trigger eventd notifier");
+                         "failed to initialize trigger eventfd notifier");
         return NULL;
     }
     if (vfio_irq_is_automasked(intp)) {
@@ -84,7 +84,7 @@ static VFIOINTp *vfio_init_intp(VFIODevice *vbasedev,
             g_free(intp->unmask);
             g_free(intp);
             error_setg_errno(errp, -ret,
-                             "failed to initialize resample eventd notifier");
+                             "failed to initialize resample eventfd notifier");
             return NULL;
         }
     }
@@ -697,7 +697,7 @@ out:
 }
 
 static const VMStateDescription vfio_platform_vmstate = {
-    .name = TYPE_VFIO_PLATFORM,
+    .name = "vfio-platform",
     .unmigratable = 1,
 };
 
diff --git a/hw/virtio/trace-events b/hw/virtio/trace-events
index 60c649c4bc..e28ba48da6 100644
--- a/hw/virtio/trace-events
+++ b/hw/virtio/trace-events
@@ -46,3 +46,10 @@ virtio_balloon_handle_output(const char *name, uint64_t gpa) "section name: %s g
 virtio_balloon_get_config(uint32_t num_pages, uint32_t actual) "num_pages: %d actual: %d"
 virtio_balloon_set_config(uint32_t actual, uint32_t oldactual) "actual: %d oldactual: %d"
 virtio_balloon_to_target(uint64_t target, uint32_t num_pages) "balloon target: 0x%"PRIx64" num_pages: %d"
+
+# virtio-mmio.c
+virtio_mmio_read(uint64_t offset) "virtio_mmio_read offset 0x%" PRIx64
+virtio_mmio_write_offset(uint64_t offset, uint64_t value) "virtio_mmio_write offset 0x%" PRIx64 " value 0x%" PRIx64
+virtio_mmio_guest_page(uint64_t size, int shift) "guest page size 0x%" PRIx64 " shift %d"
+virtio_mmio_queue_write(uint64_t value, int max_size) "mmio_queue write 0x%" PRIx64 " max %d"
+virtio_mmio_setting_irq(int level) "virtio_mmio setting IRQ %d"
diff --git a/hw/virtio/virtio-mmio.c b/hw/virtio/virtio-mmio.c
index 5807aa87fe..96c762f0bf 100644
--- a/hw/virtio/virtio-mmio.c
+++ b/hw/virtio/virtio-mmio.c
@@ -27,16 +27,8 @@
 #include "sysemu/kvm.h"
 #include "hw/virtio/virtio-bus.h"
 #include "qemu/error-report.h"
-
-/* #define DEBUG_VIRTIO_MMIO */
-
-#ifdef DEBUG_VIRTIO_MMIO
-
-#define DPRINTF(fmt, ...) \
-do { printf("virtio_mmio: " fmt , ## __VA_ARGS__); } while (0)
-#else
-#define DPRINTF(fmt, ...) do {} while (0)
-#endif
+#include "qemu/log.h"
+#include "trace.h"
 
 /* QOM macros */
 /* virtio-mmio-bus */
@@ -107,7 +99,7 @@ static uint64_t virtio_mmio_read(void *opaque, hwaddr offset, unsigned size)
     VirtIOMMIOProxy *proxy = (VirtIOMMIOProxy *)opaque;
     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 
-    DPRINTF("virtio_mmio_read offset 0x%x\n", (int)offset);
+    trace_virtio_mmio_read(offset);
 
     if (!vdev) {
         /* If no backend is present, we treat most registers as
@@ -144,7 +136,9 @@ static uint64_t virtio_mmio_read(void *opaque, hwaddr offset, unsigned size)
         }
     }
     if (size != 4) {
-        DPRINTF("wrong size access to register!\n");
+        qemu_log_mask(LOG_GUEST_ERROR,
+                      "%s: wrong size access to register!\n",
+                      __func__);
         return 0;
     }
     switch (offset) {
@@ -182,10 +176,12 @@ static uint64_t virtio_mmio_read(void *opaque, hwaddr offset, unsigned size)
     case VIRTIO_MMIO_QUEUE_ALIGN:
     case VIRTIO_MMIO_QUEUE_NOTIFY:
     case VIRTIO_MMIO_INTERRUPT_ACK:
-        DPRINTF("read of write-only register\n");
+        qemu_log_mask(LOG_GUEST_ERROR,
+                      "%s: read of write-only register\n",
+                      __func__);
         return 0;
     default:
-        DPRINTF("bad register offset\n");
+        qemu_log_mask(LOG_GUEST_ERROR, "%s: bad register offset\n", __func__);
         return 0;
     }
     return 0;
@@ -197,8 +193,7 @@ static void virtio_mmio_write(void *opaque, hwaddr offset, uint64_t value,
     VirtIOMMIOProxy *proxy = (VirtIOMMIOProxy *)opaque;
     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
 
-    DPRINTF("virtio_mmio_write offset 0x%x value 0x%" PRIx64 "\n",
-            (int)offset, value);
+    trace_virtio_mmio_write_offset(offset, value);
 
     if (!vdev) {
         /* If no backend is present, we just make all registers
@@ -226,7 +221,9 @@ static void virtio_mmio_write(void *opaque, hwaddr offset, uint64_t value,
         return;
     }
     if (size != 4) {
-        DPRINTF("wrong size access to register!\n");
+        qemu_log_mask(LOG_GUEST_ERROR,
+                      "%s: wrong size access to register!\n",
+                      __func__);
         return;
     }
     switch (offset) {
@@ -246,8 +243,7 @@ static void virtio_mmio_write(void *opaque, hwaddr offset, uint64_t value,
         if (proxy->guest_page_shift > 31) {
             proxy->guest_page_shift = 0;
         }
-        DPRINTF("guest page size %" PRIx64 " shift %d\n", value,
-                proxy->guest_page_shift);
+        trace_virtio_mmio_guest_page(value, proxy->guest_page_shift);
         break;
     case VIRTIO_MMIO_QUEUE_SEL:
         if (value < VIRTIO_QUEUE_MAX) {
@@ -255,7 +251,7 @@ static void virtio_mmio_write(void *opaque, hwaddr offset, uint64_t value,
         }
         break;
     case VIRTIO_MMIO_QUEUE_NUM:
-        DPRINTF("mmio_queue write %d max %d\n", (int)value, VIRTQUEUE_MAX_SIZE);
+        trace_virtio_mmio_queue_write(value, VIRTQUEUE_MAX_SIZE);
         virtio_queue_set_num(vdev, vdev->queue_sel, value);
         /* Note: only call this function for legacy devices */
         virtio_queue_update_rings(vdev, vdev->queue_sel);
@@ -303,11 +299,13 @@ static void virtio_mmio_write(void *opaque, hwaddr offset, uint64_t value,
     case VIRTIO_MMIO_DEVICE_FEATURES:
     case VIRTIO_MMIO_QUEUE_NUM_MAX:
     case VIRTIO_MMIO_INTERRUPT_STATUS:
-        DPRINTF("write to readonly register\n");
+        qemu_log_mask(LOG_GUEST_ERROR,
+                      "%s: write to readonly register\n",
+                      __func__);
         break;
 
     default:
-        DPRINTF("bad register offset\n");
+        qemu_log_mask(LOG_GUEST_ERROR, "%s: bad register offset\n", __func__);
     }
 }
 
@@ -327,7 +325,7 @@ static void virtio_mmio_update_irq(DeviceState *opaque, uint16_t vector)
         return;
     }
     level = (atomic_read(&vdev->isr) != 0);
-    DPRINTF("virtio_mmio setting IRQ %d\n", level);
+    trace_virtio_mmio_setting_irq(level);
     qemu_set_irq(proxy->irq, level);
 }
 
diff --git a/include/hw/pci/msix.h b/include/hw/pci/msix.h
index 1f27658d35..08acfa836e 100644
--- a/include/hw/pci/msix.h
+++ b/include/hw/pci/msix.h
@@ -4,6 +4,8 @@
 #include "qemu-common.h"
 #include "hw/pci/pci.h"
 
+#define MSIX_CAP_LENGTH 12
+
 void msix_set_message(PCIDevice *dev, int vector, MSIMessage msg);
 MSIMessage msix_get_message(PCIDevice *dev, unsigned int vector);
 int msix_init(PCIDevice *dev, unsigned short nentries,
diff --git a/migration/migration.c b/migration/migration.c
index d0a0f68f11..2865ae3fa9 100644
--- a/migration/migration.c
+++ b/migration/migration.c
@@ -1728,7 +1728,7 @@ int migrate_add_blocker(Error *reason, Error **errp)
     if (only_migratable) {
         error_propagate_prepend(errp, error_copy(reason),
                                 "disallowing migration blocker "
-                                "(--only_migratable) for: ");
+                                "(--only-migratable) for: ");
         return -EACCES;
     }
 
diff --git a/roms/Makefile b/roms/Makefile
index 0ce84a45ad..078d3fb705 100644
--- a/roms/Makefile
+++ b/roms/Makefile
@@ -62,6 +62,8 @@ default:
 	@echo "  u-boot.e500    -- update u-boot.e500"
 	@echo "  u-boot.sam460  -- update u-boot.sam460"
 	@echo "  efi            -- update UEFI (edk2) platform firmware"
+	@echo "  clean          -- delete the files generated by the previous" \
+	                          "build targets"
 
 bios: build-seabios-config-seabios-128k build-seabios-config-seabios-256k
 	cp seabios/builds/seabios-128k/bios.bin ../pc-bios/bios.bin
@@ -121,8 +123,8 @@ build-efi-roms: build-pxe-roms
 		$(patsubst %,bin-i386-efi/%.efidrv,$(pxerom_targets)) \
 		$(patsubst %,bin-x86_64-efi/%.efidrv,$(pxerom_targets))
 
-# Build scripts can pass compiler/linker flags to the EDK2 build tools
-# via the EDK2_BASETOOLS_OPTFLAGS (CPPFLAGS and CFLAGS) and
+# Build scripts can pass compiler/linker flags to the EDK2
+# build tools via the EDK2_BASETOOLS_OPTFLAGS (CFLAGS) and
 # EDK2_BASETOOLS_LDFLAGS (LDFLAGS) environment variables.
 #
 # Example: