17 files changed, 344 insertions, 1878 deletions
diff --git a/hw/arm/virt.c b/hw/arm/virt.c
index 405c61d39c..89532bd786 100644
--- a/hw/arm/virt.c
+++ b/hw/arm/virt.c
@@ -104,7 +104,7 @@ static const MemMapEntry a15memmap[] = {
     [VIRT_GIC_DIST] = { 0x8000000, 0x10000 },
     [VIRT_GIC_CPU] = { 0x8010000, 0x10000 },
     [VIRT_UART] = { 0x9000000, 0x1000 },
-    [VIRT_RTC] = { 0x90010000, 0x1000 },
+    [VIRT_RTC] = { 0x9010000, 0x1000 },
     [VIRT_MMIO] = { 0xa000000, 0x200 },
     /* ...repeating for a total of NUM_VIRTIO_TRANSPORTS, each of that size */
     /* 0x10000000 .. 0x40000000 reserved for PCI */
diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
index ebc5f034e3..816c6d9b47 100644
--- a/hw/i386/acpi-build.c
+++ b/hw/i386/acpi-build.c
@@ -25,7 +25,9 @@
 #include <glib.h>
 #include "qemu-common.h"
 #include "qemu/bitmap.h"
+#include "qemu/osdep.h"
 #include "qemu/range.h"
+#include "qemu/error-report.h"
 #include "hw/pci/pci.h"
 #include "qom/cpu.h"
 #include "hw/i386/pc.h"
@@ -52,6 +54,16 @@
 #include "qapi/qmp/qint.h"
 #include "qom/qom-qobject.h"
 
+/* These are used to size the ACPI tables for -M pc-i440fx-1.7 and
+ * -M pc-i440fx-2.0.  Even if the actual amount of AML generated grows
+ * a little bit, there should be plenty of free space since the DSDT
+ * shrunk by ~1.5k between QEMU 2.0 and QEMU 2.1.
+ */
+#define ACPI_BUILD_LEGACY_CPU_AML_SIZE    97
+#define ACPI_BUILD_ALIGN_SIZE             0x1000
+
+#define ACPI_BUILD_TABLE_SIZE             0x20000
+
 typedef struct AcpiCpuInfo {
     DECLARE_BITMAP(found_cpus, ACPI_CPU_HOTPLUG_ID_LIMIT);
 } AcpiCpuInfo;
@@ -64,6 +76,7 @@ typedef struct AcpiMcfgInfo {
 typedef struct AcpiPmInfo {
     bool s3_disabled;
     bool s4_disabled;
+    bool pcihp_bridge_en;
     uint8_t s4_val;
     uint16_t sci_int;
     uint8_t acpi_enable_cmd;
@@ -85,6 +98,7 @@ typedef struct AcpiBuildPciBusHotplugState {
     GArray *device_table;
     GArray *notify_table;
     struct AcpiBuildPciBusHotplugState *parent;
+    bool pcihp_bridge_en;
 } AcpiBuildPciBusHotplugState;
 
 static void acpi_get_dsdt(AcpiMiscInfo *info)
@@ -188,6 +202,9 @@ static void acpi_get_pm_info(AcpiPmInfo *pm)
                                            NULL);
     pm->gpe0_blk_len = object_property_get_int(obj, ACPI_PM_PROP_GPE0_BLK_LEN,
                                                NULL);
+    pm->pcihp_bridge_en =
+        object_property_get_bool(obj, "acpi-pci-hotplug-with-bridge-support",
+                                 NULL);
 }
 
 static void acpi_get_misc_info(AcpiMiscInfo *info)
@@ -768,11 +785,13 @@ static void acpi_set_pci_info(void)
 }
 
 static void build_pci_bus_state_init(AcpiBuildPciBusHotplugState *state,
-                                     AcpiBuildPciBusHotplugState *parent)
+                                     AcpiBuildPciBusHotplugState *parent,
+                                     bool pcihp_bridge_en)
 {
     state->parent = parent;
     state->device_table = build_alloc_array();
     state->notify_table = build_alloc_array();
+    state->pcihp_bridge_en = pcihp_bridge_en;
 }
 
 static void build_pci_bus_state_cleanup(AcpiBuildPciBusHotplugState *state)
@@ -786,7 +805,7 @@ static void *build_pci_bus_begin(PCIBus *bus, void *parent_state)
     AcpiBuildPciBusHotplugState *parent = parent_state;
     AcpiBuildPciBusHotplugState *child = g_malloc(sizeof *child);
 
-    build_pci_bus_state_init(child, parent);
+    build_pci_bus_state_init(child, parent, parent->pcihp_bridge_en);
 
     return child;
 }
@@ -807,6 +826,14 @@ static void build_pci_bus_end(PCIBus *bus, void *bus_state)
     GArray *method;
     bool bus_hotplug_support = false;
 
+    /*
+     * Skip bridge subtree creation if bridge hotplug is disabled
+     * to make acpi tables compatible with legacy machine types.
+     */
+    if (!child->pcihp_bridge_en && bus->parent_dev) {
+        return;
+    }
+
     if (bus->parent_dev) {
         op = 0x82; /* DeviceOp */
         build_append_nameseg(bus_table, "S%.02X_",
@@ -844,6 +871,7 @@ static void build_pci_bus_end(PCIBus *bus, void *bus_state)
         PCIDeviceClass *pc;
         PCIDevice *pdev = bus->devices[i];
         int slot = PCI_SLOT(i);
+        bool bridge_in_acpi;
 
         if (!pdev) {
             continue;
@@ -853,7 +881,13 @@ static void build_pci_bus_end(PCIBus *bus, void *bus_state)
         pc = PCI_DEVICE_GET_CLASS(pdev);
         dc = DEVICE_GET_CLASS(pdev);
 
-        if (pc->class_id == PCI_CLASS_BRIDGE_ISA || pc->is_bridge) {
+        /* When hotplug for bridges is enabled, bridges are
+         * described in ACPI separately (see build_pci_bus_end).
+         * In this case they aren't themselves hot-pluggable.
+         */
+        bridge_in_acpi = pc->is_bridge && child->pcihp_bridge_en;
+
+        if (pc->class_id == PCI_CLASS_BRIDGE_ISA || bridge_in_acpi) {
             set_bit(slot, slot_device_system);
         }
 
@@ -865,7 +899,7 @@ static void build_pci_bus_end(PCIBus *bus, void *bus_state)
             }
         }
 
-        if (!dc->hotpluggable || pc->is_bridge) {
+        if (!dc->hotpluggable || bridge_in_acpi) {
             clear_bit(slot, slot_hotplug_enable);
         }
     }
@@ -1130,7 +1164,7 @@ build_ssdt(GArray *table_data, GArray *linker,
                 bus = PCI_HOST_BRIDGE(pci_host)->bus;
             }
 
-            build_pci_bus_state_init(&hotplug_state, NULL);
+            build_pci_bus_state_init(&hotplug_state, NULL, pm->pcihp_bridge_en);
 
             if (bus) {
                 /* Scan all PCI buses. Generate tables to support hotplug. */
@@ -1440,13 +1474,14 @@ static
 void acpi_build(PcGuestInfo *guest_info, AcpiBuildTables *tables)
 {
     GArray *table_offsets;
-    unsigned facs, dsdt, rsdt;
+    unsigned facs, ssdt, dsdt, rsdt;
     AcpiCpuInfo cpu;
     AcpiPmInfo pm;
     AcpiMiscInfo misc;
     AcpiMcfgInfo mcfg;
     PcPciInfo pci;
     uint8_t *u;
+    size_t aml_len = 0;
 
     acpi_get_cpu_info(&cpu);
     acpi_get_pm_info(&pm);
@@ -1474,13 +1509,20 @@ void acpi_build(PcGuestInfo *guest_info, AcpiBuildTables *tables)
     dsdt = tables->table_data->len;
     build_dsdt(tables->table_data, tables->linker, &misc);
 
+    /* Count the size of the DSDT and SSDT, we will need it for legacy
+     * sizing of ACPI tables.
+     */
+    aml_len += tables->table_data->len - dsdt;
+
     /* ACPI tables pointed to by RSDT */
     acpi_add_table(table_offsets, tables->table_data);
     build_fadt(tables->table_data, tables->linker, &pm, facs, dsdt);
 
+    ssdt = tables->table_data->len;
     acpi_add_table(table_offsets, tables->table_data);
     build_ssdt(tables->table_data, tables->linker, &cpu, &pm, &misc, &pci,
                guest_info);
+    aml_len += tables->table_data->len - ssdt;
 
     acpi_add_table(table_offsets, tables->table_data);
     build_madt(tables->table_data, tables->linker, &cpu, guest_info);
@@ -1513,14 +1555,53 @@ void acpi_build(PcGuestInfo *guest_info, AcpiBuildTables *tables)
     /* RSDP is in FSEG memory, so allocate it separately */
     build_rsdp(tables->rsdp, tables->linker, rsdt);
 
-    /* We'll expose it all to Guest so align size to reduce
+    /* We'll expose it all to Guest so we want to reduce
      * chance of size changes.
      * RSDP is small so it's easy to keep it immutable, no need to
      * bother with alignment.
+     *
+     * We used to align the tables to 4k, but of course this would
+     * too simple to be enough.  4k turned out to be too small an
+     * alignment very soon, and in fact it is almost impossible to
+     * keep the table size stable for all (max_cpus, max_memory_slots)
+     * combinations.  So the table size is always 64k for pc-i440fx-2.1
+     * and we give an error if the table grows beyond that limit.
+     *
+     * We still have the problem of migrating from "-M pc-i440fx-2.0".  For
+     * that, we exploit the fact that QEMU 2.1 generates _smaller_ tables
+     * than 2.0 and we can always pad the smaller tables with zeros.  We can
+     * then use the exact size of the 2.0 tables.
+     *
+     * All this is for PIIX4, since QEMU 2.0 didn't support Q35 migration.
      */
-    acpi_align_size(tables->table_data, 0x1000);
+    if (guest_info->legacy_acpi_table_size) {
+        /* Subtracting aml_len gives the size of fixed tables.  Then add the
+         * size of the PIIX4 DSDT/SSDT in QEMU 2.0.
+         */
+        int legacy_aml_len =
+            guest_info->legacy_acpi_table_size +
+            ACPI_BUILD_LEGACY_CPU_AML_SIZE * max_cpus;
+        int legacy_table_size =
+            ROUND_UP(tables->table_data->len - aml_len + legacy_aml_len,
+                     ACPI_BUILD_ALIGN_SIZE);
+        if (tables->table_data->len > legacy_table_size) {
+            /* Should happen only with PCI bridges and -M pc-i440fx-2.0.  */
+            error_report("Warning: migration may not work.");
+        }
+        g_array_set_size(tables->table_data, legacy_table_size);
+    } else {
+        /* Make sure we have a buffer in case we need to resize the tables. */
+        if (tables->table_data->len > ACPI_BUILD_TABLE_SIZE / 2) {
+            /* As of QEMU 2.1, this fires with 160 VCPUs and 255 memory slots.  */
+            error_report("Warning: ACPI tables are larger than 64k.");
+            error_report("Warning: migration may not work.");
+            error_report("Warning: please remove CPUs, NUMA nodes, "
+                         "memory slots or PCI bridges.");
+        }
+        acpi_align_size(tables->table_data, ACPI_BUILD_TABLE_SIZE);
+    }
 
-    acpi_align_size(tables->linker, 0x1000);
+    acpi_align_size(tables->linker, ACPI_BUILD_ALIGN_SIZE);
 
     /* Cleanup memory that's no longer used. */
     g_array_free(table_offsets, true);
diff --git a/hw/i386/acpi-dsdt.dsl b/hw/i386/acpi-dsdt.dsl
index 3cc0ea0f9a..6ba017014a 100644
--- a/hw/i386/acpi-dsdt.dsl
+++ b/hw/i386/acpi-dsdt.dsl
@@ -181,57 +181,45 @@ DefinitionBlock (
 
     Scope(\_SB) {
         Scope(PCI0) {
-            Name(_PRT, Package() {
-                /* PCI IRQ routing table, example from ACPI 2.0a specification,
-                   section 6.2.8.1 */
-                /* Note: we provide the same info as the PCI routing
-                   table of the Bochs BIOS */
-
-#define prt_slot(nr, lnk0, lnk1, lnk2, lnk3) \
-    Package() { nr##ffff, 0, lnk0, 0 }, \
-    Package() { nr##ffff, 1, lnk1, 0 }, \
-    Package() { nr##ffff, 2, lnk2, 0 }, \
-    Package() { nr##ffff, 3, lnk3, 0 }
-
-#define prt_slot0(nr) prt_slot(nr, LNKD, LNKA, LNKB, LNKC)
-#define prt_slot1(nr) prt_slot(nr, LNKA, LNKB, LNKC, LNKD)
-#define prt_slot2(nr) prt_slot(nr, LNKB, LNKC, LNKD, LNKA)
-#define prt_slot3(nr) prt_slot(nr, LNKC, LNKD, LNKA, LNKB)
-
-                prt_slot0(0x0000),
-                /* Device 1 is power mgmt device, and can only use irq 9 */
-                prt_slot(0x0001, LNKS, LNKB, LNKC, LNKD),
-                prt_slot2(0x0002),
-                prt_slot3(0x0003),
-                prt_slot0(0x0004),
-                prt_slot1(0x0005),
-                prt_slot2(0x0006),
-                prt_slot3(0x0007),
-                prt_slot0(0x0008),
-                prt_slot1(0x0009),
-                prt_slot2(0x000a),
-                prt_slot3(0x000b),
-                prt_slot0(0x000c),
-                prt_slot1(0x000d),
-                prt_slot2(0x000e),
-                prt_slot3(0x000f),
-                prt_slot0(0x0010),
-                prt_slot1(0x0011),
-                prt_slot2(0x0012),
-                prt_slot3(0x0013),
-                prt_slot0(0x0014),
-                prt_slot1(0x0015),
-                prt_slot2(0x0016),
-                prt_slot3(0x0017),
-                prt_slot0(0x0018),
-                prt_slot1(0x0019),
-                prt_slot2(0x001a),
-                prt_slot3(0x001b),
-                prt_slot0(0x001c),
-                prt_slot1(0x001d),
-                prt_slot2(0x001e),
-                prt_slot3(0x001f),
-            })
+            Method (_PRT, 0) {
+                Store(Package(128) {}, Local0)
+                Store(Zero, Local1)
+                While(LLess(Local1, 128)) {
+                    // slot = pin >> 2
+                    Store(ShiftRight(Local1, 2), Local2)
+
+                    // lnk = (slot + pin) & 3
+                    Store(And(Add(Local1, Local2), 3), Local3)
+                    If (LEqual(Local3, 0)) {
+                        Store(Package(4) { Zero, Zero, LNKD, Zero }, Local4)
+                    }
+                    If (LEqual(Local3, 1)) {
+                        // device 1 is the power-management device, needs SCI
+                        If (LEqual(Local1, 4)) {
+                            Store(Package(4) { Zero, Zero, LNKS, Zero }, Local4)
+                        } Else {
+                            Store(Package(4) { Zero, Zero, LNKA, Zero }, Local4)
+                        }
+                    }
+                    If (LEqual(Local3, 2)) {
+                        Store(Package(4) { Zero, Zero, LNKB, Zero }, Local4)
+                    }
+                    If (LEqual(Local3, 3)) {
+                        Store(Package(4) { Zero, Zero, LNKC, Zero }, Local4)
+                    }
+
+                    // Complete the interrupt routing entry:
+                    //    Package(4) { 0x[slot]FFFF, [pin], [link], 0) }
+
+                    Store(Or(ShiftLeft(Local2, 16), 0xFFFF), Index(Local4, 0))
+                    Store(And(Local1, 3),                    Index(Local4, 1))
+                    Store(Local4,                            Index(Local0, Local1))
+
+                    Increment(Local1)
+                }
+
+                Return(Local0)
+            }
         }
 
         Field(PCI0.ISA.P40C, ByteAcc, NoLock, Preserve) {
diff --git a/hw/i386/acpi-dsdt.hex.generated b/hw/i386/acpi-dsdt.hex.generated
index ee490e89c3..6c8a1fcdfb 100644
--- a/hw/i386/acpi-dsdt.hex.generated
+++ b/hw/i386/acpi-dsdt.hex.generated
@@ -3,12 +3,12 @@ static unsigned char AcpiDsdtAmlCode[] = {
 0x53,
 0x44,
 0x54,
-0x93,
-0x11,
+0xf7,
+0xa,
 0x0,
 0x0,
 0x1,
-0xf5,
+0x2e,
 0x42,
 0x58,
 0x50,
@@ -31,9 +31,9 @@ static unsigned char AcpiDsdtAmlCode[] = {
 0x4e,
 0x54,
 0x4c,
-0x15,
-0x11,
 0x13,
+0x9,
+0x12,
 0x20,
 0x10,
 0x49,
@@ -1439,1419 +1439,68 @@ static unsigned char AcpiDsdtAmlCode[] = {
 0xa4,
 0x0,
 0x10,
-0x4a,
-0xa0,
+0x4e,
+0x36,
 0x5f,
 0x53,
 0x42,
 0x5f,
 0x10,
-0x47,
-0x74,
+0x4b,
+0xa,
 0x50,
 0x43,
 0x49,
 0x30,
-0x8,
+0x14,
+0x44,
+0xa,
 0x5f,
 0x50,
 0x52,
 0x54,
-0x12,
-0x4b,
-0x73,
-0x80,
-0x12,
-0xb,
-0x4,
-0xb,
-0xff,
-0xff,
-0x0,
-0x4c,
-0x4e,
-0x4b,
-0x44,
-0x0,
-0x12,
-0xb,
-0x4,
-0xb,
-0xff,
-0xff,
-0x1,
-0x4c,
-0x4e,
-0x4b,
-0x41,
-0x0,
-0x12,
-0xc,
-0x4,
-0xb,
-0xff,
-0xff,
-0xa,
-0x2,
-0x4c,
-0x4e,
-0x4b,
-0x42,
-0x0,
-0x12,
-0xc,
-0x4,
-0xb,
-0xff,
-0xff,
-0xa,
-0x3,
-0x4c,
-0x4e,
-0x4b,
-0x43,
-0x0,
-0x12,
-0xd,
-0x4,
-0xc,
-0xff,
-0xff,
-0x1,
-0x0,
-0x0,
-0x4c,
-0x4e,
-0x4b,
-0x53,
-0x0,
-0x12,
-0xd,
-0x4,
-0xc,
-0xff,
-0xff,
-0x1,
-0x0,
-0x1,
-0x4c,
-0x4e,
-0x4b,
-0x42,
-0x0,
-0x12,
-0xe,
-0x4,
-0xc,
-0xff,
-0xff,
-0x1,
-0x0,
-0xa,
-0x2,
-0x4c,
-0x4e,
-0x4b,
-0x43,
-0x0,
-0x12,
-0xe,
-0x4,
-0xc,
-0xff,
-0xff,
-0x1,
-0x0,
-0xa,
-0x3,
-0x4c,
-0x4e,
-0x4b,
-0x44,
-0x0,
-0x12,
-0xd,
-0x4,
-0xc,
-0xff,
-0xff,
-0x2,
-0x0,
-0x0,
-0x4c,
-0x4e,
-0x4b,
-0x42,
-0x0,
-0x12,
-0xd,
-0x4,
-0xc,
-0xff,
-0xff,
-0x2,
-0x0,
-0x1,
-0x4c,
-0x4e,
-0x4b,
-0x43,
-0x0,
-0x12,
-0xe,
-0x4,
-0xc,
-0xff,
-0xff,
-0x2,
-0x0,
-0xa,
-0x2,
-0x4c,
-0x4e,
-0x4b,
-0x44,
-0x0,
-0x12,
-0xe,
-0x4,
-0xc,
-0xff,
-0xff,
-0x2,
-0x0,
-0xa,
-0x3,
-0x4c,
-0x4e,
-0x4b,
-0x41,
-0x0,
-0x12,
-0xd,
-0x4,
-0xc,
-0xff,
-0xff,
-0x3,
-0x0,
-0x0,
-0x4c,
-0x4e,
-0x4b,
-0x43,
-0x0,
-0x12,
-0xd,
-0x4,
-0xc,
-0xff,
-0xff,
-0x3,
-0x0,
-0x1,
-0x4c,
-0x4e,
-0x4b,
-0x44,
-0x0,
-0x12,
-0xe,
-0x4,
-0xc,
-0xff,
-0xff,
-0x3,
-0x0,
-0xa,
-0x2,
-0x4c,
-0x4e,
-0x4b,
-0x41,
-0x0,
-0x12,
-0xe,
-0x4,
-0xc,
-0xff,
-0xff,
-0x3,
-0x0,
-0xa,
-0x3,
-0x4c,
-0x4e,
-0x4b,
-0x42,
-0x0,
-0x12,
-0xd,
-0x4,
-0xc,
-0xff,
-0xff,
-0x4,
-0x0,
-0x0,
-0x4c,
-0x4e,
-0x4b,
-0x44,
-0x0,
-0x12,
-0xd,
-0x4,
-0xc,
-0xff,
-0xff,
-0x4,
-0x0,
-0x1,
-0x4c,
-0x4e,
-0x4b,
-0x41,
-0x0,
-0x12,
-0xe,
-0x4,
-0xc,
-0xff,
-0xff,
-0x4,
-0x0,
-0xa,
-0x2,
-0x4c,
-0x4e,
-0x4b,
-0x42,
-0x0,
-0x12,
-0xe,
-0x4,
-0xc,
-0xff,
-0xff,
-0x4,
-0x0,
-0xa,
-0x3,
-0x4c,
-0x4e,
-0x4b,
-0x43,
-0x0,
-0x12,
-0xd,
-0x4,
-0xc,
-0xff,
-0xff,
-0x5,
-0x0,
-0x0,
-0x4c,
-0x4e,
-0x4b,
-0x41,
-0x0,
-0x12,
-0xd,
-0x4,
-0xc,
-0xff,
-0xff,
-0x5,
-0x0,
-0x1,
-0x4c,
-0x4e,
-0x4b,
-0x42,
-0x0,
-0x12,
-0xe,
-0x4,
-0xc,
-0xff,
-0xff,
-0x5,
-0x0,
-0xa,
-0x2,
-0x4c,
-0x4e,
-0x4b,
-0x43,
-0x0,
-0x12,
-0xe,
-0x4,
-0xc,
-0xff,
-0xff,
-0x5,
-0x0,
-0xa,
-0x3,
-0x4c,
-0x4e,
-0x4b,
-0x44,
-0x0,
-0x12,
-0xd,
-0x4,
-0xc,
-0xff,
-0xff,
-0x6,
-0x0,
-0x0,
-0x4c,
-0x4e,
-0x4b,
-0x42,
-0x0,
-0x12,
-0xd,
-0x4,
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-0xff,
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-0x0,
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-0x4b,
-0x44,
-0x0,
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-0x2,
-0x4c,
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-0x42,
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-0x4b,
-0x44,
-0x0,
-0x12,
-0xd,
-0x4,
-0xc,
-0xff,
-0xff,
-0x8,
-0x0,
-0x1,
-0x4c,
-0x4e,
-0x4b,
-0x41,
 0x0,
+0x70,
 0x12,
-0xe,
-0x4,
-0xc,
-0xff,
-0xff,
-0x8,
-0x0,
-0xa,
 0x2,
-0x4c,
-0x4e,
-0x4b,
-0x42,
-0x0,
-0x12,
-0xe,
-0x4,
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-0xff,
-0x8,
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-0x4b,
-0x43,
-0x0,
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-0x0,
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-0x41,
-0x0,
-0x12,
-0xd,
-0x4,
-0xc,
-0xff,
-0xff,
-0x9,
+0x80,
+0x60,
+0x70,
 0x0,
-0x1,
-0x4c,
-0x4e,
-0x4b,
+0x61,
+0xa2,
 0x42,
-0x0,
-0x12,
-0xe,
-0x4,
-0xc,
-0xff,
-0xff,
 0x9,
-0x0,
-0xa,
-0x2,
-0x4c,
-0x4e,
-0x4b,
-0x43,
-0x0,
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-0xa,
-0x0,
-0x0,
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-0x4b,
-0x42,
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-0xff,
-0xa,
-0x0,
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-0x4b,
-0x41,
-0x0,
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-0xb,
-0x0,
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-0xb,
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-0x44,
-0x0,
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-0xb,
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-0x4b,
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-0xff,
-0xff,
-0xd,
-0x0,
-0x1,
-0x4c,
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-0x42,
-0x0,
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-0xff,
-0xff,
-0xd,
-0x0,
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-0x2,
-0x4c,
-0x4e,
-0x4b,
-0x43,
-0x0,
-0x12,
-0xe,
-0x4,
-0xc,
-0xff,
-0xff,
-0xd,
-0x0,
+0x95,
+0x61,
 0xa,
-0x3,
-0x4c,
-0x4e,
-0x4b,
-0x44,
-0x0,
-0x12,
-0xd,
-0x4,
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-0xff,
-0xe,
-0x0,
-0x0,
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-0x42,
-0x0,
-0x12,
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-0xff,
-0xff,
-0xe,
-0x0,
+0x80,
+0x70,
+0x7a,
+0x61,
 0xa,
 0x2,
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-0x4,
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-0xff,
-0xe,
-0x0,
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-0x41,
-0x0,
-0x12,
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-0x4,
-0xc,
-0xff,
-0xff,
-0xf,
-0x0,
-0x0,
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-0x4e,
-0x4b,
-0x43,
-0x0,
-0x12,
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-0x4,
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-0xff,
-0xff,
-0xf,
-0x0,
-0x1,
-0x4c,
-0x4e,
-0x4b,
-0x44,
 0x0,
-0x12,
-0xe,
-0x4,
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-0xff,
-0xf,
-0x0,
-0xa,
-0x2,
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-0x0,
-0x12,
-0xe,
-0x4,
-0xc,
-0xff,
-0xff,
-0xf,
+0x62,
+0x70,
+0x7b,
+0x72,
+0x61,
+0x62,
 0x0,
 0xa,
 0x3,
-0x4c,
-0x4e,
-0x4b,
-0x42,
 0x0,
-0x12,
-0xd,
-0x4,
-0xc,
-0xff,
-0xff,
-0x10,
-0x0,
-0x0,
-0x4c,
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-0x4b,
-0x44,
-0x0,
-0x12,
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-0x4,
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-0xff,
-0x10,
-0x0,
-0x1,
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-0xff,
-0x10,
-0x0,
-0xa,
-0x2,
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-0x4e,
-0x4b,
-0x42,
-0x0,
-0x12,
-0xe,
-0x4,
-0xc,
-0xff,
-0xff,
+0x63,
+0xa0,
 0x10,
+0x93,
+0x63,
 0x0,
-0xa,
-0x3,
-0x4c,
-0x4e,
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-0x43,
-0x0,
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-0xff,
-0x11,
-0x0,
-0x0,
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-0x41,
-0x0,
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-0xff,
-0x11,
-0x0,
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-0x3,
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-0x44,
-0x0,
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-0xff,
-0x12,
-0x0,
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-0xff,
-0x12,
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-0x3,
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-0x4e,
-0x4b,
-0x41,
-0x0,
-0x12,
-0xd,
-0x4,
-0xc,
-0xff,
-0xff,
-0x13,
-0x0,
-0x0,
-0x4c,
-0x4e,
-0x4b,
-0x43,
-0x0,
-0x12,
-0xd,
-0x4,
-0xc,
-0xff,
-0xff,
-0x13,
-0x0,
-0x1,
-0x4c,
-0x4e,
-0x4b,
-0x44,
-0x0,
-0x12,
-0xe,
-0x4,
-0xc,
-0xff,
-0xff,
-0x13,
-0x0,
-0xa,
-0x2,
-0x4c,
-0x4e,
-0x4b,
-0x41,
-0x0,
-0x12,
-0xe,
-0x4,
-0xc,
-0xff,
-0xff,
-0x13,
-0x0,
-0xa,
-0x3,
-0x4c,
-0x4e,
-0x4b,
-0x42,
-0x0,
-0x12,
-0xd,
-0x4,
-0xc,
-0xff,
-0xff,
-0x14,
-0x0,
-0x0,
-0x4c,
-0x4e,
-0x4b,
-0x44,
-0x0,
-0x12,
-0xd,
-0x4,
-0xc,
-0xff,
-0xff,
-0x14,
-0x0,
-0x1,
-0x4c,
-0x4e,
-0x4b,
-0x41,
-0x0,
-0x12,
-0xe,
-0x4,
-0xc,
-0xff,
-0xff,
-0x14,
-0x0,
-0xa,
-0x2,
-0x4c,
-0x4e,
-0x4b,
-0x42,
-0x0,
-0x12,
-0xe,
-0x4,
-0xc,
-0xff,
-0xff,
-0x14,
-0x0,
-0xa,
-0x3,
-0x4c,
-0x4e,
-0x4b,
-0x43,
-0x0,
-0x12,
-0xd,
-0x4,
-0xc,
-0xff,
-0xff,
-0x15,
-0x0,
-0x0,
-0x4c,
-0x4e,
-0x4b,
-0x41,
-0x0,
-0x12,
-0xd,
-0x4,
-0xc,
-0xff,
-0xff,
-0x15,
-0x0,
-0x1,
-0x4c,
-0x4e,
-0x4b,
-0x42,
-0x0,
-0x12,
-0xe,
-0x4,
-0xc,
-0xff,
-0xff,
-0x15,
-0x0,
-0xa,
-0x2,
-0x4c,
-0x4e,
-0x4b,
-0x43,
-0x0,
-0x12,
-0xe,
-0x4,
-0xc,
-0xff,
-0xff,
-0x15,
-0x0,
-0xa,
-0x3,
-0x4c,
-0x4e,
-0x4b,
-0x44,
-0x0,
-0x12,
-0xd,
-0x4,
-0xc,
-0xff,
-0xff,
-0x16,
-0x0,
-0x0,
-0x4c,
-0x4e,
-0x4b,
-0x42,
-0x0,
-0x12,
-0xd,
-0x4,
-0xc,
-0xff,
-0xff,
-0x16,
-0x0,
-0x1,
-0x4c,
-0x4e,
-0x4b,
-0x43,
-0x0,
-0x12,
-0xe,
-0x4,
-0xc,
-0xff,
-0xff,
-0x16,
-0x0,
-0xa,
-0x2,
-0x4c,
-0x4e,
-0x4b,
-0x44,
-0x0,
-0x12,
-0xe,
-0x4,
-0xc,
-0xff,
-0xff,
-0x16,
-0x0,
-0xa,
-0x3,
-0x4c,
-0x4e,
-0x4b,
-0x41,
-0x0,
-0x12,
-0xd,
-0x4,
-0xc,
-0xff,
-0xff,
-0x17,
-0x0,
-0x0,
-0x4c,
-0x4e,
-0x4b,
-0x43,
-0x0,
-0x12,
-0xd,
-0x4,
-0xc,
-0xff,
-0xff,
-0x17,
-0x0,
-0x1,
-0x4c,
-0x4e,
-0x4b,
-0x44,
-0x0,
-0x12,
-0xe,
-0x4,
-0xc,
-0xff,
-0xff,
-0x17,
-0x0,
-0xa,
-0x2,
-0x4c,
-0x4e,
-0x4b,
-0x41,
-0x0,
-0x12,
-0xe,
-0x4,
-0xc,
-0xff,
-0xff,
-0x17,
-0x0,
-0xa,
-0x3,
-0x4c,
-0x4e,
-0x4b,
-0x42,
-0x0,
+0x70,
 0x12,
-0xd,
+0x9,
 0x4,
-0xc,
-0xff,
-0xff,
-0x18,
 0x0,
 0x0,
 0x4c,
@@ -2859,456 +1508,115 @@ static unsigned char AcpiDsdtAmlCode[] = {
 0x4b,
 0x44,
 0x0,
-0x12,
-0xd,
-0x4,
-0xc,
-0xff,
-0xff,
-0x18,
-0x0,
+0x64,
+0xa0,
+0x24,
+0x93,
+0x63,
 0x1,
-0x4c,
-0x4e,
-0x4b,
-0x41,
-0x0,
-0x12,
-0xe,
-0x4,
-0xc,
-0xff,
-0xff,
-0x18,
-0x0,
-0xa,
-0x2,
-0x4c,
-0x4e,
-0x4b,
-0x42,
-0x0,
-0x12,
-0xe,
-0x4,
-0xc,
-0xff,
-0xff,
-0x18,
-0x0,
+0xa0,
+0x11,
+0x93,
+0x61,
 0xa,
-0x3,
-0x4c,
-0x4e,
-0x4b,
-0x43,
-0x0,
-0x12,
-0xd,
-0x4,
-0xc,
-0xff,
-0xff,
-0x19,
-0x0,
-0x0,
-0x4c,
-0x4e,
-0x4b,
-0x41,
-0x0,
-0x12,
-0xd,
 0x4,
-0xc,
-0xff,
-0xff,
-0x19,
-0x0,
-0x1,
-0x4c,
-0x4e,
-0x4b,
-0x42,
-0x0,
-0x12,
-0xe,
-0x4,
-0xc,
-0xff,
-0xff,
-0x19,
-0x0,
-0xa,
-0x2,
-0x4c,
-0x4e,
-0x4b,
-0x43,
-0x0,
-0x12,
-0xe,
-0x4,
-0xc,
-0xff,
-0xff,
-0x19,
-0x0,
-0xa,
-0x3,
-0x4c,
-0x4e,
-0x4b,
-0x44,
-0x0,
+0x70,
 0x12,
-0xd,
+0x9,
 0x4,
-0xc,
-0xff,
-0xff,
-0x1a,
 0x0,
 0x0,
 0x4c,
 0x4e,
 0x4b,
-0x42,
+0x53,
 0x0,
-0x12,
+0x64,
+0xa1,
 0xd,
-0x4,
-0xc,
-0xff,
-0xff,
-0x1a,
-0x0,
-0x1,
-0x4c,
-0x4e,
-0x4b,
-0x43,
-0x0,
+0x70,
 0x12,
-0xe,
+0x9,
 0x4,
-0xc,
-0xff,
-0xff,
-0x1a,
-0x0,
-0xa,
-0x2,
-0x4c,
-0x4e,
-0x4b,
-0x44,
 0x0,
-0x12,
-0xe,
-0x4,
-0xc,
-0xff,
-0xff,
-0x1a,
 0x0,
-0xa,
-0x3,
 0x4c,
 0x4e,
 0x4b,
 0x41,
 0x0,
-0x12,
-0xd,
-0x4,
-0xc,
-0xff,
-0xff,
-0x1b,
-0x0,
-0x0,
-0x4c,
-0x4e,
-0x4b,
-0x43,
-0x0,
-0x12,
-0xd,
-0x4,
-0xc,
-0xff,
-0xff,
-0x1b,
-0x0,
-0x1,
-0x4c,
-0x4e,
-0x4b,
-0x44,
-0x0,
-0x12,
-0xe,
-0x4,
-0xc,
-0xff,
-0xff,
-0x1b,
-0x0,
+0x64,
+0xa0,
+0x11,
+0x93,
+0x63,
 0xa,
 0x2,
-0x4c,
-0x4e,
-0x4b,
-0x41,
-0x0,
-0x12,
-0xe,
-0x4,
-0xc,
-0xff,
-0xff,
-0x1b,
-0x0,
-0xa,
-0x3,
-0x4c,
-0x4e,
-0x4b,
-0x42,
-0x0,
-0x12,
-0xd,
-0x4,
-0xc,
-0xff,
-0xff,
-0x1c,
-0x0,
-0x0,
-0x4c,
-0x4e,
-0x4b,
-0x44,
-0x0,
+0x70,
 0x12,
-0xd,
+0x9,
 0x4,
-0xc,
-0xff,
-0xff,
-0x1c,
 0x0,
-0x1,
-0x4c,
-0x4e,
-0x4b,
-0x41,
 0x0,
-0x12,
-0xe,
-0x4,
-0xc,
-0xff,
-0xff,
-0x1c,
-0x0,
-0xa,
-0x2,
 0x4c,
 0x4e,
 0x4b,
 0x42,
 0x0,
-0x12,
-0xe,
-0x4,
-0xc,
-0xff,
-0xff,
-0x1c,
-0x0,
+0x64,
+0xa0,
+0x11,
+0x93,
+0x63,
 0xa,
 0x3,
-0x4c,
-0x4e,
-0x4b,
-0x43,
-0x0,
-0x12,
-0xd,
-0x4,
-0xc,
-0xff,
-0xff,
-0x1d,
-0x0,
-0x0,
-0x4c,
-0x4e,
-0x4b,
-0x41,
-0x0,
+0x70,
 0x12,
-0xd,
+0x9,
 0x4,
-0xc,
-0xff,
-0xff,
-0x1d,
-0x0,
-0x1,
-0x4c,
-0x4e,
-0x4b,
-0x42,
 0x0,
-0x12,
-0xe,
-0x4,
-0xc,
-0xff,
-0xff,
-0x1d,
 0x0,
-0xa,
-0x2,
 0x4c,
 0x4e,
 0x4b,
 0x43,
 0x0,
-0x12,
-0xe,
-0x4,
-0xc,
-0xff,
-0xff,
-0x1d,
-0x0,
+0x64,
+0x70,
+0x7d,
+0x79,
+0x62,
 0xa,
-0x3,
-0x4c,
-0x4e,
-0x4b,
-0x44,
-0x0,
-0x12,
-0xd,
-0x4,
-0xc,
-0xff,
-0xff,
-0x1e,
-0x0,
-0x0,
-0x4c,
-0x4e,
-0x4b,
-0x42,
-0x0,
-0x12,
-0xd,
-0x4,
-0xc,
-0xff,
-0xff,
-0x1e,
-0x0,
-0x1,
-0x4c,
-0x4e,
-0x4b,
-0x43,
+0x10,
 0x0,
-0x12,
-0xe,
-0x4,
-0xc,
+0xb,
 0xff,
 0xff,
-0x1e,
 0x0,
-0xa,
-0x2,
-0x4c,
-0x4e,
-0x4b,
-0x44,
+0x88,
+0x64,
 0x0,
-0x12,
-0xe,
-0x4,
-0xc,
-0xff,
-0xff,
-0x1e,
 0x0,
+0x70,
+0x7b,
+0x61,
 0xa,
 0x3,
-0x4c,
-0x4e,
-0x4b,
-0x41,
-0x0,
-0x12,
-0xd,
-0x4,
-0xc,
-0xff,
-0xff,
-0x1f,
-0x0,
-0x0,
-0x4c,
-0x4e,
-0x4b,
-0x43,
-0x0,
-0x12,
-0xd,
-0x4,
-0xc,
-0xff,
-0xff,
-0x1f,
 0x0,
+0x88,
+0x64,
 0x1,
-0x4c,
-0x4e,
-0x4b,
-0x44,
-0x0,
-0x12,
-0xe,
-0x4,
-0xc,
-0xff,
-0xff,
-0x1f,
 0x0,
-0xa,
-0x2,
-0x4c,
-0x4e,
-0x4b,
-0x41,
-0x0,
-0x12,
-0xe,
-0x4,
-0xc,
-0xff,
-0xff,
-0x1f,
-0x0,
-0xa,
-0x3,
-0x4c,
-0x4e,
-0x4b,
-0x42,
+0x70,
+0x64,
+0x88,
+0x60,
+0x61,
 0x0,
+0x75,
+0x61,
+0xa4,
+0x60,
 0x5b,
 0x81,
 0x24,
diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index 2cf22b1293..9e589825f0 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -1190,6 +1190,31 @@ void pc_acpi_init(const char *default_dsdt)
     }
 }
 
+FWCfgState *xen_load_linux(const char *kernel_filename,
+                           const char *kernel_cmdline,
+                           const char *initrd_filename,
+                           ram_addr_t below_4g_mem_size,
+                           PcGuestInfo *guest_info)
+{
+    int i;
+    FWCfgState *fw_cfg;
+
+    assert(kernel_filename != NULL);
+
+    fw_cfg = fw_cfg_init(BIOS_CFG_IOPORT, BIOS_CFG_IOPORT + 1, 0, 0);
+    rom_set_fw(fw_cfg);
+
+    load_linux(fw_cfg, kernel_filename, initrd_filename,
+               kernel_cmdline, below_4g_mem_size);
+    for (i = 0; i < nb_option_roms; i++) {
+        assert(!strcmp(option_rom[i].name, "linuxboot.bin") ||
+               !strcmp(option_rom[i].name, "multiboot.bin"));
+        rom_add_option(option_rom[i].name, option_rom[i].bootindex);
+    }
+    guest_info->fw_cfg = fw_cfg;
+    return fw_cfg;
+}
+
 FWCfgState *pc_memory_init(MachineState *machine,
                            MemoryRegion *system_memory,
                            ram_addr_t below_4g_mem_size,
diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c
index 7081c08a69..4f22be85da 100644
--- a/hw/i386/pc_piix.c
+++ b/hw/i386/pc_piix.c
@@ -61,6 +61,7 @@ static const int ide_irq[MAX_IDE_BUS] = { 14, 15 };
 
 static bool has_pci_info;
 static bool has_acpi_build = true;
+static int legacy_acpi_table_size;
 static bool smbios_defaults = true;
 static bool smbios_legacy_mode;
 /* Make sure that guest addresses aligned at 1Gbyte boundaries get mapped to
@@ -163,6 +164,7 @@ static void pc_init1(MachineState *machine,
     guest_info = pc_guest_info_init(below_4g_mem_size, above_4g_mem_size);
 
     guest_info->has_acpi_build = has_acpi_build;
+    guest_info->legacy_acpi_table_size = legacy_acpi_table_size;
 
     guest_info->has_pci_info = has_pci_info;
     guest_info->isapc_ram_fw = !pci_enabled;
@@ -180,6 +182,13 @@ static void pc_init1(MachineState *machine,
         fw_cfg = pc_memory_init(machine, system_memory,
                                 below_4g_mem_size, above_4g_mem_size,
                                 rom_memory, &ram_memory, guest_info);
+    } else if (machine->kernel_filename != NULL) {
+        /* For xen HVM direct kernel boot, load linux here */
+        fw_cfg = xen_load_linux(machine->kernel_filename,
+                                machine->kernel_cmdline,
+                                machine->initrd_filename,
+                                below_4g_mem_size,
+                                guest_info);
     }
 
     gsi_state = g_malloc0(sizeof(*gsi_state));
@@ -297,6 +306,23 @@ static void pc_init_pci(MachineState *machine)
 
 static void pc_compat_2_0(MachineState *machine)
 {
+    /* This value depends on the actual DSDT and SSDT compiled into
+     * the source QEMU; unfortunately it depends on the binary and
+     * not on the machine type, so we cannot make pc-i440fx-1.7 work on
+     * both QEMU 1.7 and QEMU 2.0.
+     *
+     * Large variations cause migration to fail for more than one
+     * consecutive value of the "-smp" maxcpus option.
+     *
+     * For small variations of the kind caused by different iasl versions,
+     * the 4k rounding usually leaves slack.  However, there could be still
+     * one or two values that break.  For QEMU 1.7 and QEMU 2.0 the
+     * slack is only ~10 bytes before one "-smp maxcpus" value breaks!
+     *
+     * 6652 is valid for QEMU 2.0, the right value for pc-i440fx-1.7 on
+     * QEMU 1.7 it is 6414.  For RHEL/CentOS 7.0 it is 6418.
+     */
+    legacy_acpi_table_size = 6652;
     smbios_legacy_mode = true;
     has_reserved_memory = false;
 }
@@ -307,6 +333,7 @@ static void pc_compat_1_7(MachineState *machine)
     smbios_defaults = false;
     gigabyte_align = false;
     option_rom_has_mr = true;
+    legacy_acpi_table_size = 6414;
     x86_cpu_compat_disable_kvm_features(FEAT_1_ECX, CPUID_EXT_X2APIC);
 }
 
diff --git a/hw/i386/pc_q35.c b/hw/i386/pc_q35.c
index f55196150c..c39ee98933 100644
--- a/hw/i386/pc_q35.c
+++ b/hw/i386/pc_q35.c
@@ -155,6 +155,11 @@ static void pc_q35_init(MachineState *machine)
     guest_info->has_acpi_build = has_acpi_build;
     guest_info->has_reserved_memory = has_reserved_memory;
 
+    /* Migration was not supported in 2.0 for Q35, so do not bother
+     * with this hack (see hw/i386/acpi-build.c).
+     */
+    guest_info->legacy_acpi_table_size = 0;
+
     if (smbios_defaults) {
         MachineClass *mc = MACHINE_GET_CLASS(machine);
         /* These values are guest ABI, do not change */
diff --git a/hw/i386/xen/xen_apic.c b/hw/i386/xen/xen_apic.c
index 63bb7f77c6..f5acd6a096 100644
--- a/hw/i386/xen/xen_apic.c
+++ b/hw/i386/xen/xen_apic.c
@@ -40,6 +40,7 @@ static void xen_apic_realize(DeviceState *dev, Error **errp)
 {
     APICCommonState *s = APIC_COMMON(dev);
 
+    s->vapic_control = 0;
     memory_region_init_io(&s->io_memory, OBJECT(s), &xen_apic_io_ops, s,
                           "xen-apic-msi", APIC_SPACE_SIZE);
 
diff --git a/hw/misc/imx_ccm.c b/hw/misc/imx_ccm.c
index 750b9061db..0920288634 100644
--- a/hw/misc/imx_ccm.c
+++ b/hw/misc/imx_ccm.c
@@ -67,6 +67,7 @@ static const VMStateDescription vmstate_imx_ccm = {
         VMSTATE_UINT32(pmcr0, IMXCCMState),
         VMSTATE_UINT32(pmcr1, IMXCCMState),
         VMSTATE_UINT32(pll_refclk_freq, IMXCCMState),
+        VMSTATE_END_OF_LIST()
     },
     .post_load = imx_ccm_post_load,
 };
diff --git a/hw/ppc/mac_newworld.c b/hw/ppc/mac_newworld.c
index 7e97af4a23..f5bccd2ad5 100644
--- a/hw/ppc/mac_newworld.c
+++ b/hw/ppc/mac_newworld.c
@@ -204,8 +204,9 @@ static void ppc_core99_init(MachineState *machine)
     memory_region_add_subregion(get_system_memory(), 0, ram);
 
     /* allocate and load BIOS */
-    memory_region_allocate_system_memory(bios, NULL, "ppc_core99.bios",
-                                         BIOS_SIZE);
+    memory_region_init_ram(bios, NULL, "ppc_core99.bios", BIOS_SIZE);
+    vmstate_register_ram_global(bios);
+
     if (bios_name == NULL)
         bios_name = PROM_FILENAME;
     filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
diff --git a/hw/ppc/mac_oldworld.c b/hw/ppc/mac_oldworld.c
index afae8253e9..cd9bdbc53e 100644
--- a/hw/ppc/mac_oldworld.c
+++ b/hw/ppc/mac_oldworld.c
@@ -135,8 +135,9 @@ static void ppc_heathrow_init(MachineState *machine)
     memory_region_add_subregion(sysmem, 0, ram);
 
     /* allocate and load BIOS */
-    memory_region_allocate_system_memory(bios, NULL, "ppc_heathrow.bios",
-                                         BIOS_SIZE);
+    memory_region_init_ram(bios, NULL, "ppc_heathrow.bios", BIOS_SIZE);
+    vmstate_register_ram_global(bios);
+
     if (bios_name == NULL)
         bios_name = PROM_FILENAME;
     filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
diff --git a/hw/ppc/ppc405_boards.c b/hw/ppc/ppc405_boards.c
index 6b566cd8e5..11d33792fb 100644
--- a/hw/ppc/ppc405_boards.c
+++ b/hw/ppc/ppc405_boards.c
@@ -214,7 +214,8 @@ static void ref405ep_init(MachineState *machine)
                         33333333, &pic, kernel_filename == NULL ? 0 : 1);
     /* allocate SRAM */
     sram_size = 512 * 1024;
-    memory_region_allocate_system_memory(sram, NULL, "ef405ep.sram", sram_size);
+    memory_region_init_ram(sram, NULL, "ef405ep.sram", sram_size);
+    vmstate_register_ram_global(sram);
     memory_region_add_subregion(sysmem, 0xFFF00000, sram);
     /* allocate and load BIOS */
 #ifdef DEBUG_BOARD_INIT
@@ -245,8 +246,9 @@ static void ref405ep_init(MachineState *machine)
         printf("Load BIOS from file\n");
 #endif
         bios = g_new(MemoryRegion, 1);
-        memory_region_allocate_system_memory(bios, NULL, "ef405ep.bios",
-                                             BIOS_SIZE);
+        memory_region_init_ram(bios, NULL, "ef405ep.bios", BIOS_SIZE);
+        vmstate_register_ram_global(bios);
+
         if (bios_name == NULL)
             bios_name = BIOS_FILENAME;
         filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
@@ -508,6 +510,7 @@ static void taihu_405ep_init(MachineState *machine)
     MemoryRegion *sysmem = get_system_memory();
     MemoryRegion *bios;
     MemoryRegion *ram_memories = g_malloc(2 * sizeof(*ram_memories));
+    MemoryRegion *ram = g_malloc0(sizeof(*ram));
     hwaddr ram_bases[2], ram_sizes[2];
     long bios_size;
     target_ulong kernel_base, initrd_base;
@@ -517,15 +520,20 @@ static void taihu_405ep_init(MachineState *machine)
     DriveInfo *dinfo;
 
     /* RAM is soldered to the board so the size cannot be changed */
-    memory_region_allocate_system_memory(&ram_memories[0], NULL,
-                           "taihu_405ep.ram-0", 0x04000000);
+    ram_size = 0x08000000;
+    memory_region_allocate_system_memory(ram, NULL, "taihu_405ep.ram",
+                                         ram_size);
+
     ram_bases[0] = 0;
     ram_sizes[0] = 0x04000000;
-    memory_region_allocate_system_memory(&ram_memories[1], NULL,
-                           "taihu_405ep.ram-1", 0x04000000);
+    memory_region_init_alias(&ram_memories[0], NULL,
+                             "taihu_405ep.ram-0", ram, ram_bases[0],
+                             ram_sizes[0]);
     ram_bases[1] = 0x04000000;
     ram_sizes[1] = 0x04000000;
-    ram_size = 0x08000000;
+    memory_region_init_alias(&ram_memories[1], NULL,
+                             "taihu_405ep.ram-1", ram, ram_bases[1],
+                             ram_sizes[1]);
 #ifdef DEBUG_BOARD_INIT
     printf("%s: register cpu\n", __func__);
 #endif
@@ -564,8 +572,8 @@ static void taihu_405ep_init(MachineState *machine)
         if (bios_name == NULL)
             bios_name = BIOS_FILENAME;
         bios = g_new(MemoryRegion, 1);
-        memory_region_allocate_system_memory(bios, NULL, "taihu_405ep.bios",
-                                             BIOS_SIZE);
+        memory_region_init_ram(bios, NULL, "taihu_405ep.bios", BIOS_SIZE);
+        vmstate_register_ram_global(bios);
         filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
         if (filename) {
             bios_size = load_image(filename, memory_region_get_ram_ptr(bios));
diff --git a/hw/ppc/ppc405_uc.c b/hw/ppc/ppc405_uc.c
index fcd5f2d917..a73e918a14 100644
--- a/hw/ppc/ppc405_uc.c
+++ b/hw/ppc/ppc405_uc.c
@@ -974,8 +974,8 @@ static void ppc405_ocm_init(CPUPPCState *env)
 
     ocm = g_malloc0(sizeof(ppc405_ocm_t));
     /* XXX: Size is 4096 or 0x04000000 */
-    memory_region_allocate_system_memory(&ocm->isarc_ram, NULL, "ppc405.ocm",
-                                         4096);
+    memory_region_init_ram(&ocm->isarc_ram, NULL, "ppc405.ocm", 4096);
+    vmstate_register_ram_global(&ocm->isarc_ram);
     memory_region_init_alias(&ocm->dsarc_ram, NULL, "ppc405.dsarc", &ocm->isarc_ram,
                              0, 4096);
     qemu_register_reset(&ocm_reset, ocm);
diff --git a/hw/ppc/ppc4xx_devs.c b/hw/ppc/ppc4xx_devs.c
index 07f9d00ea7..2b5d2cd6c3 100644
--- a/hw/ppc/ppc4xx_devs.c
+++ b/hw/ppc/ppc4xx_devs.c
@@ -683,28 +683,20 @@ ram_addr_t ppc4xx_sdram_adjust(ram_addr_t ram_size, int nr_banks,
                                hwaddr ram_sizes[],
                                const unsigned int sdram_bank_sizes[])
 {
+    MemoryRegion *ram = g_malloc0(sizeof(*ram));
     ram_addr_t size_left = ram_size;
     ram_addr_t base = 0;
+    unsigned int bank_size;
     int i;
     int j;
 
     for (i = 0; i < nr_banks; i++) {
         for (j = 0; sdram_bank_sizes[j] != 0; j++) {
-            unsigned int bank_size = sdram_bank_sizes[j];
-
+            bank_size = sdram_bank_sizes[j];
             if (bank_size <= size_left) {
-                char name[32];
-                snprintf(name, sizeof(name), "ppc4xx.sdram%d", i);
-                memory_region_allocate_system_memory(&ram_memories[i], NULL,
-                                                     name, bank_size);
-                ram_bases[i] = base;
-                ram_sizes[i] = bank_size;
-                base += bank_size;
                 size_left -= bank_size;
-                break;
             }
         }
-
         if (!size_left) {
             /* No need to use the remaining banks. */
             break;
@@ -712,9 +704,31 @@ ram_addr_t ppc4xx_sdram_adjust(ram_addr_t ram_size, int nr_banks,
     }
 
     ram_size -= size_left;
-    if (size_left)
+    if (size_left) {
         printf("Truncating memory to %d MiB to fit SDRAM controller limits.\n",
                (int)(ram_size >> 20));
+    }
+
+    memory_region_allocate_system_memory(ram, NULL, "ppc4xx.sdram", ram_size);
+
+    size_left = ram_size;
+    for (i = 0; i < nr_banks && size_left; i++) {
+        for (j = 0; sdram_bank_sizes[j] != 0; j++) {
+            bank_size = sdram_bank_sizes[j];
+
+            if (bank_size <= size_left) {
+                char name[32];
+                snprintf(name, sizeof(name), "ppc4xx.sdram%d", i);
+                memory_region_init_alias(&ram_memories[i], NULL, name, ram,
+                                         base, bank_size);
+                ram_bases[i] = base;
+                ram_sizes[i] = bank_size;
+                base += bank_size;
+                size_left -= bank_size;
+                break;
+            }
+        }
+    }
 
     return ram_size;
 }
diff --git a/hw/usb/dev-mtp.c b/hw/usb/dev-mtp.c
index 1b51a90022..384d4a5ac5 100644
--- a/hw/usb/dev-mtp.c
+++ b/hw/usb/dev-mtp.c
@@ -1090,7 +1090,7 @@ static const VMStateDescription vmstate_usb_mtp = {
 };
 
 static Property mtp_properties[] = {
-    DEFINE_PROP_STRING("root", MTPState, root),
+    DEFINE_PROP_STRING("x-root", MTPState, root),
     DEFINE_PROP_STRING("desc", MTPState, desc),
     DEFINE_PROP_END_OF_LIST(),
 };
diff --git a/hw/usb/hcd-xhci.c b/hw/usb/hcd-xhci.c
index 7f2af8925f..58c4b11527 100644
--- a/hw/usb/hcd-xhci.c
+++ b/hw/usb/hcd-xhci.c
@@ -3737,6 +3737,7 @@ static const VMStateDescription vmstate_xhci_event = {
         VMSTATE_UINT32(flags,  XHCIEvent),
         VMSTATE_UINT8(slotid,  XHCIEvent),
         VMSTATE_UINT8(epid,    XHCIEvent),
+        VMSTATE_END_OF_LIST()
     }
 };
 
diff --git a/hw/virtio/virtio-rng.c b/hw/virtio/virtio-rng.c
index 1356aca8d6..03fd04a1e5 100644
--- a/hw/virtio/virtio-rng.c
+++ b/hw/virtio/virtio-rng.c
@@ -142,8 +142,15 @@ static void virtio_rng_device_realize(DeviceState *dev, Error **errp)
     Error *local_err = NULL;
 
     if (!vrng->conf.period_ms > 0) {
-        error_set(errp, QERR_INVALID_PARAMETER_VALUE, "period",
-                  "a positive number");
+        error_setg(errp, "'period' parameter expects a positive integer");
+        return;
+    }
+
+    /* Workaround: Property parsing does not enforce unsigned integers,
+     * So this is a hack to reject such numbers. */
+    if (vrng->conf.max_bytes > INT64_MAX) {
+        error_setg(errp, "'max-bytes' parameter must be non-negative, "
+                   "and less than 2^63");
         return;
     }
 
@@ -171,17 +178,15 @@ static void virtio_rng_device_realize(DeviceState *dev, Error **errp)
                                  "rng", NULL);
     }
 
-    virtio_init(vdev, "virtio-rng", VIRTIO_ID_RNG, 0);
-
     vrng->rng = vrng->conf.rng;
     if (vrng->rng == NULL) {
-        error_set(errp, QERR_INVALID_PARAMETER_VALUE, "rng", "a valid object");
+        error_setg(errp, "'rng' parameter expects a valid object");
         return;
     }
 
-    vrng->vq = virtio_add_queue(vdev, 8, handle_input);
+    virtio_init(vdev, "virtio-rng", VIRTIO_ID_RNG, 0);
 
-    assert(vrng->conf.max_bytes <= INT64_MAX);
+    vrng->vq = virtio_add_queue(vdev, 8, handle_input);
     vrng->quota_remaining = vrng->conf.max_bytes;
 
     vrng->rate_limit_timer = timer_new_ms(QEMU_CLOCK_VIRTUAL,