diff --git a/MAINTAINERS b/MAINTAINERS
index 4dfd8bf..be02724 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -644,6 +644,12 @@
 F: include/qemu/cpu.h
 F: target-i386/cpu.c
 
+ICC Bus
+M: Igor Mammedov <imammedo@redhat.com>
+S: Supported
+F: include/hw/cpu/icc_bus.h
+F: hw/cpu/icc_bus.c
+
 Device Tree
 M: Peter Crosthwaite <peter.crosthwaite@petalogix.com>
 M: Alexander Graf <agraf@suse.de>
diff --git a/Makefile.target b/Makefile.target
index 6583b05..ce4391f 100644
--- a/Makefile.target
+++ b/Makefile.target
@@ -60,6 +60,12 @@
 # Dummy command so that make thinks it has done something
 	@true
 
+CONFIG_NO_PCI = $(if $(subst n,,$(CONFIG_PCI)),n,y)
+CONFIG_NO_KVM = $(if $(subst n,,$(CONFIG_KVM)),n,y)
+CONFIG_NO_XEN = $(if $(subst n,,$(CONFIG_XEN)),n,y)
+CONFIG_NO_GET_MEMORY_MAPPING = $(if $(subst n,,$(CONFIG_HAVE_GET_MEMORY_MAPPING)),n,y)
+CONFIG_NO_CORE_DUMP = $(if $(subst n,,$(CONFIG_HAVE_CORE_DUMP)),n,y)
+
 #########################################################
 # cpu emulator library
 obj-y = exec.o translate-all.o cpu-exec.o
@@ -70,6 +76,7 @@
 obj-y += target-$(TARGET_BASE_ARCH)/
 obj-y += disas.o
 obj-$(CONFIG_GDBSTUB_XML) += gdbstub-xml.o
+obj-$(CONFIG_NO_KVM) += kvm-stub.o
 
 #########################################################
 # Linux user emulator target
@@ -98,18 +105,11 @@
 #########################################################
 # System emulator target
 ifdef CONFIG_SOFTMMU
-CONFIG_NO_PCI = $(if $(subst n,,$(CONFIG_PCI)),n,y)
-CONFIG_NO_KVM = $(if $(subst n,,$(CONFIG_KVM)),n,y)
-CONFIG_NO_XEN = $(if $(subst n,,$(CONFIG_XEN)),n,y)
-CONFIG_NO_GET_MEMORY_MAPPING = $(if $(subst n,,$(CONFIG_HAVE_GET_MEMORY_MAPPING)),n,y)
-CONFIG_NO_CORE_DUMP = $(if $(subst n,,$(CONFIG_HAVE_CORE_DUMP)),n,y)
-
 obj-y += arch_init.o cpus.o monitor.o gdbstub.o balloon.o ioport.o
 obj-y += qtest.o
 obj-y += hw/
 obj-$(CONFIG_FDT) += device_tree.o
 obj-$(CONFIG_KVM) += kvm-all.o
-obj-$(CONFIG_NO_KVM) += kvm-stub.o
 obj-y += memory.o savevm.o cputlb.o
 obj-$(CONFIG_HAVE_GET_MEMORY_MAPPING) += memory_mapping.o
 obj-$(CONFIG_HAVE_CORE_DUMP) += dump.o
diff --git a/bsd-user/elfload.c b/bsd-user/elfload.c
index a6cd3ab..5e20510 100644
--- a/bsd-user/elfload.c
+++ b/bsd-user/elfload.c
@@ -110,7 +110,7 @@
 
 static uint32_t get_elf_hwcap(void)
 {
-  return thread_env->cpuid_features;
+    return thread_env->features[FEAT_1_EDX];
 }
 
 #ifdef TARGET_X86_64
diff --git a/bsd-user/main.c b/bsd-user/main.c
index cc84981..0da3ab9 100644
--- a/bsd-user/main.c
+++ b/bsd-user/main.c
@@ -1004,13 +1004,13 @@
 
     env->cr[0] = CR0_PG_MASK | CR0_WP_MASK | CR0_PE_MASK;
     env->hflags |= HF_PE_MASK;
-    if (env->cpuid_features & CPUID_SSE) {
+    if (env->features[FEAT_1_EDX] & CPUID_SSE) {
         env->cr[4] |= CR4_OSFXSR_MASK;
         env->hflags |= HF_OSFXSR_MASK;
     }
 #ifndef TARGET_ABI32
     /* enable 64 bit mode if possible */
-    if (!(env->cpuid_ext2_features & CPUID_EXT2_LM)) {
+    if (!(env->features[FEAT_8000_0001_EDX] & CPUID_EXT2_LM)) {
         fprintf(stderr, "The selected x86 CPU does not support 64 bit mode\n");
         exit(1);
     }
diff --git a/cpus.c b/cpus.c
index 5a98a37..c232265 100644
--- a/cpus.c
+++ b/cpus.c
@@ -812,6 +812,12 @@
 
 static void tcg_exec_all(void);
 
+static void tcg_signal_cpu_creation(CPUState *cpu, void *data)
+{
+    cpu->thread_id = qemu_get_thread_id();
+    cpu->created = true;
+}
+
 static void *qemu_tcg_cpu_thread_fn(void *arg)
 {
     CPUState *cpu = arg;
@@ -820,13 +826,8 @@
     qemu_tcg_init_cpu_signals();
     qemu_thread_get_self(cpu->thread);
 
-    /* signal CPU creation */
     qemu_mutex_lock(&qemu_global_mutex);
-    for (env = first_cpu; env != NULL; env = env->next_cpu) {
-        cpu = ENV_GET_CPU(env);
-        cpu->thread_id = qemu_get_thread_id();
-        cpu->created = true;
-    }
+    qemu_for_each_cpu(tcg_signal_cpu_creation, NULL);
     qemu_cond_signal(&qemu_cpu_cond);
 
     /* wait for initial kick-off after machine start */
@@ -973,9 +974,10 @@
     if (qemu_in_vcpu_thread()) {
         cpu_stop_current();
         if (!kvm_enabled()) {
+            penv = first_cpu;
             while (penv) {
                 CPUState *pcpu = ENV_GET_CPU(penv);
-                pcpu->stop = 0;
+                pcpu->stop = false;
                 pcpu->stopped = true;
                 penv = penv->next_cpu;
             }
@@ -993,6 +995,13 @@
     }
 }
 
+void cpu_resume(CPUState *cpu)
+{
+    cpu->stop = false;
+    cpu->stopped = false;
+    qemu_cpu_kick(cpu);
+}
+
 void resume_all_vcpus(void)
 {
     CPUArchState *penv = first_cpu;
@@ -1000,9 +1009,7 @@
     qemu_clock_enable(vm_clock, true);
     while (penv) {
         CPUState *pcpu = ENV_GET_CPU(penv);
-        pcpu->stop = false;
-        pcpu->stopped = false;
-        qemu_cpu_kick(pcpu);
+        cpu_resume(pcpu);
         penv = penv->next_cpu;
     }
 }
diff --git a/default-configs/i386-softmmu.mak b/default-configs/i386-softmmu.mak
index 4e30505..03deca2 100644
--- a/default-configs/i386-softmmu.mak
+++ b/default-configs/i386-softmmu.mak
@@ -44,4 +44,5 @@
 CONFIG_PCI_Q35=y
 CONFIG_APIC=y
 CONFIG_IOAPIC=y
+CONFIG_ICC_BUS=y
 CONFIG_PVPANIC=y
diff --git a/default-configs/x86_64-softmmu.mak b/default-configs/x86_64-softmmu.mak
index 5af8fd3..599b630 100644
--- a/default-configs/x86_64-softmmu.mak
+++ b/default-configs/x86_64-softmmu.mak
@@ -44,4 +44,5 @@
 CONFIG_PCI_Q35=y
 CONFIG_APIC=y
 CONFIG_IOAPIC=y
+CONFIG_ICC_BUS=y
 CONFIG_PVPANIC=y
diff --git a/docs/specs/acpi_cpu_hotplug.txt b/docs/specs/acpi_cpu_hotplug.txt
new file mode 100644
index 0000000..5dec0c5
--- /dev/null
+++ b/docs/specs/acpi_cpu_hotplug.txt
@@ -0,0 +1,22 @@
+QEMU<->ACPI BIOS CPU hotplug interface
+--------------------------------------
+
+QEMU supports CPU hotplug via ACPI. This document
+describes the interface between QEMU and the ACPI BIOS.
+
+ACPI GPE block (IO ports 0xafe0-0xafe3, byte access):
+-----------------------------------------
+
+Generic ACPI GPE block. Bit 2 (GPE.2) used to notify CPU
+hot-add/remove event to ACPI BIOS, via SCI interrupt.
+
+CPU present bitmap (IO port 0xaf00-0xae1f, 1-byte access):
+---------------------------------------------------------------
+One bit per CPU. Bit position reflects corresponding CPU APIC ID.
+Read-only.
+
+CPU hot-add/remove notification:
+-----------------------------------------------------
+QEMU sets/clears corresponding CPU bit on hot-add/remove event.
+CPU present map read by ACPI BIOS GPE.2 handler to notify OS of CPU
+hot-(un)plug events.
diff --git a/dump-stub.c b/dump-stub.c
index a9d0b3c..b3f42cb 100644
--- a/dump-stub.c
+++ b/dump-stub.c
@@ -24,34 +24,6 @@
     error_set(errp, QERR_UNSUPPORTED);
 }
 
-int cpu_write_elf64_note(write_core_dump_function f,
-                                       CPUArchState *env, int cpuid,
-                                       void *opaque)
-{
-    return -1;
-}
-
-int cpu_write_elf32_note(write_core_dump_function f,
-                                       CPUArchState *env, int cpuid,
-                                       void *opaque)
-{
-    return -1;
-}
-
-int cpu_write_elf64_qemunote(write_core_dump_function f,
-                                           CPUArchState *env,
-                                           void *opaque)
-{
-    return -1;
-}
-
-int cpu_write_elf32_qemunote(write_core_dump_function f,
-                                           CPUArchState *env,
-                                           void *opaque)
-{
-    return -1;
-}
-
 int cpu_get_dump_info(ArchDumpInfo *info)
 {
     return -1;
diff --git a/dump.c b/dump.c
index b34f143..c0d3da5 100644
--- a/dump.c
+++ b/dump.c
@@ -282,7 +282,7 @@
     for (env = first_cpu; env != NULL; env = env->next_cpu) {
         cpu = ENV_GET_CPU(env);
         id = cpu_index(cpu);
-        ret = cpu_write_elf64_note(fd_write_vmcore, env, id, s);
+        ret = cpu_write_elf64_note(fd_write_vmcore, cpu, id, s);
         if (ret < 0) {
             dump_error(s, "dump: failed to write elf notes.\n");
             return -1;
@@ -290,7 +290,7 @@
     }
 
     for (env = first_cpu; env != NULL; env = env->next_cpu) {
-        ret = cpu_write_elf64_qemunote(fd_write_vmcore, env, s);
+        ret = cpu_write_elf64_qemunote(fd_write_vmcore, cpu, s);
         if (ret < 0) {
             dump_error(s, "dump: failed to write CPU status.\n");
             return -1;
@@ -334,7 +334,7 @@
     for (env = first_cpu; env != NULL; env = env->next_cpu) {
         cpu = ENV_GET_CPU(env);
         id = cpu_index(cpu);
-        ret = cpu_write_elf32_note(fd_write_vmcore, env, id, s);
+        ret = cpu_write_elf32_note(fd_write_vmcore, cpu, id, s);
         if (ret < 0) {
             dump_error(s, "dump: failed to write elf notes.\n");
             return -1;
@@ -342,7 +342,7 @@
     }
 
     for (env = first_cpu; env != NULL; env = env->next_cpu) {
-        ret = cpu_write_elf32_qemunote(fd_write_vmcore, env, s);
+        ret = cpu_write_elf32_qemunote(fd_write_vmcore, cpu, s);
         if (ret < 0) {
             dump_error(s, "dump: failed to write CPU status.\n");
             return -1;
diff --git a/exec.c b/exec.c
index fa1e0c3..19725db 100644
--- a/exec.c
+++ b/exec.c
@@ -265,6 +265,16 @@
     return env ? cpu : NULL;
 }
 
+void qemu_for_each_cpu(void (*func)(CPUState *cpu, void *data), void *data)
+{
+    CPUArchState *env = first_cpu;
+
+    while (env) {
+        func(ENV_GET_CPU(env), data);
+        env = env->next_cpu;
+    }
+}
+
 void cpu_exec_init(CPUArchState *env)
 {
     CPUState *cpu = ENV_GET_CPU(env);
diff --git a/hw/acpi/piix4.c b/hw/acpi/piix4.c
index 88386d7..c4af1cc 100644
--- a/hw/acpi/piix4.c
+++ b/hw/acpi/piix4.c
@@ -48,19 +48,28 @@
 #define PCI_EJ_BASE 0xae08
 #define PCI_RMV_BASE 0xae0c
 
+#define PIIX4_PROC_BASE 0xaf00
+#define PIIX4_PROC_LEN 32
+
 #define PIIX4_PCI_HOTPLUG_STATUS 2
+#define PIIX4_CPU_HOTPLUG_STATUS 4
 
 struct pci_status {
     uint32_t up; /* deprecated, maintained for migration compatibility */
     uint32_t down;
 };
 
+typedef struct CPUStatus {
+    uint8_t sts[PIIX4_PROC_LEN];
+} CPUStatus;
+
 typedef struct PIIX4PMState {
     PCIDevice dev;
 
     MemoryRegion io;
     MemoryRegion io_gpe;
     MemoryRegion io_pci;
+    MemoryRegion io_cpu;
     ACPIREGS ar;
 
     APMState apm;
@@ -82,6 +91,9 @@
     uint8_t disable_s3;
     uint8_t disable_s4;
     uint8_t s4_val;
+
+    CPUStatus gpe_cpu;
+    Notifier cpu_added_notifier;
 } PIIX4PMState;
 
 static void piix4_acpi_system_hot_add_init(MemoryRegion *parent,
@@ -100,8 +112,8 @@
                    ACPI_BITMASK_POWER_BUTTON_ENABLE |
                    ACPI_BITMASK_GLOBAL_LOCK_ENABLE |
                    ACPI_BITMASK_TIMER_ENABLE)) != 0) ||
-        (((s->ar.gpe.sts[0] & s->ar.gpe.en[0])
-          & PIIX4_PCI_HOTPLUG_STATUS) != 0);
+        (((s->ar.gpe.sts[0] & s->ar.gpe.en[0]) &
+          (PIIX4_PCI_HOTPLUG_STATUS | PIIX4_CPU_HOTPLUG_STATUS)) != 0);
 
     qemu_set_irq(s->irq, sci_level);
     /* schedule a timer interruption if needed */
@@ -585,6 +597,73 @@
     },
 };
 
+static uint64_t cpu_status_read(void *opaque, hwaddr addr, unsigned int size)
+{
+    PIIX4PMState *s = opaque;
+    CPUStatus *cpus = &s->gpe_cpu;
+    uint64_t val = cpus->sts[addr];
+
+    return val;
+}
+
+static void cpu_status_write(void *opaque, hwaddr addr, uint64_t data,
+                             unsigned int size)
+{
+    /* TODO: implement VCPU removal on guest signal that CPU can be removed */
+}
+
+static const MemoryRegionOps cpu_hotplug_ops = {
+    .read = cpu_status_read,
+    .write = cpu_status_write,
+    .endianness = DEVICE_LITTLE_ENDIAN,
+    .valid = {
+        .min_access_size = 1,
+        .max_access_size = 1,
+    },
+};
+
+typedef enum {
+    PLUG,
+    UNPLUG,
+} HotplugEventType;
+
+static void piix4_cpu_hotplug_req(PIIX4PMState *s, CPUState *cpu,
+                                  HotplugEventType action)
+{
+    CPUStatus *g = &s->gpe_cpu;
+    ACPIGPE *gpe = &s->ar.gpe;
+    CPUClass *k = CPU_GET_CLASS(cpu);
+    int64_t cpu_id;
+
+    assert(s != NULL);
+
+    *gpe->sts = *gpe->sts | PIIX4_CPU_HOTPLUG_STATUS;
+    cpu_id = k->get_arch_id(CPU(cpu));
+    if (action == PLUG) {
+        g->sts[cpu_id / 8] |= (1 << (cpu_id % 8));
+    } else {
+        g->sts[cpu_id / 8] &= ~(1 << (cpu_id % 8));
+    }
+    pm_update_sci(s);
+}
+
+static void piix4_cpu_added_req(Notifier *n, void *opaque)
+{
+    PIIX4PMState *s = container_of(n, PIIX4PMState, cpu_added_notifier);
+
+    piix4_cpu_hotplug_req(s, CPU(opaque), PLUG);
+}
+
+static void piix4_init_cpu_status(CPUState *cpu, void *data)
+{
+    CPUStatus *g = (CPUStatus *)data;
+    CPUClass *k = CPU_GET_CLASS(cpu);
+    int64_t id = k->get_arch_id(cpu);
+
+    g_assert((id / 8) < PIIX4_PROC_LEN);
+    g->sts[id / 8] |= (1 << (id % 8));
+}
+
 static int piix4_device_hotplug(DeviceState *qdev, PCIDevice *dev,
                                 PCIHotplugState state);
 
@@ -600,6 +679,13 @@
     memory_region_add_subregion(parent, PCI_HOTPLUG_ADDR,
                                 &s->io_pci);
     pci_bus_hotplug(bus, piix4_device_hotplug, &s->dev.qdev);
+
+    qemu_for_each_cpu(piix4_init_cpu_status, &s->gpe_cpu);
+    memory_region_init_io(&s->io_cpu, &cpu_hotplug_ops, s, "apci-cpu-hotplug",
+                          PIIX4_PROC_LEN);
+    memory_region_add_subregion(parent, PIIX4_PROC_BASE, &s->io_cpu);
+    s->cpu_added_notifier.notify = piix4_cpu_added_req;
+    qemu_register_cpu_added_notifier(&s->cpu_added_notifier);
 }
 
 static void enable_device(PIIX4PMState *s, int slot)
diff --git a/hw/cpu/Makefile.objs b/hw/cpu/Makefile.objs
index a49ca04..4461ece 100644
--- a/hw/cpu/Makefile.objs
+++ b/hw/cpu/Makefile.objs
@@ -1,4 +1,5 @@
 obj-$(CONFIG_ARM11MPCORE) += arm11mpcore.o
 obj-$(CONFIG_ARM9MPCORE) += a9mpcore.o
 obj-$(CONFIG_ARM15MPCORE) += a15mpcore.o
+obj-$(CONFIG_ICC_BUS) += icc_bus.o
 
diff --git a/hw/cpu/icc_bus.c b/hw/cpu/icc_bus.c
new file mode 100644
index 0000000..73a1dc9
--- /dev/null
+++ b/hw/cpu/icc_bus.c
@@ -0,0 +1,119 @@
+/* icc_bus.c
+ * emulate x86 ICC (Interrupt Controller Communications) bus
+ *
+ * Copyright (c) 2013 Red Hat, Inc
+ *
+ * Authors:
+ *     Igor Mammedov <imammedo@redhat.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>
+ */
+#include "hw/cpu/icc_bus.h"
+#include "hw/sysbus.h"
+
+/* icc-bridge implementation */
+
+static void icc_bus_init(Object *obj)
+{
+    BusState *b = BUS(obj);
+
+    b->allow_hotplug = true;
+}
+
+static const TypeInfo icc_bus_info = {
+    .name = TYPE_ICC_BUS,
+    .parent = TYPE_BUS,
+    .instance_size = sizeof(ICCBus),
+    .instance_init = icc_bus_init,
+};
+
+
+/* icc-device implementation */
+
+static void icc_device_realize(DeviceState *dev, Error **errp)
+{
+    ICCDevice *id = ICC_DEVICE(dev);
+    ICCDeviceClass *idc = ICC_DEVICE_GET_CLASS(id);
+
+    if (idc->init) {
+        if (idc->init(id) < 0) {
+            error_setg(errp, "%s initialization failed.",
+                       object_get_typename(OBJECT(dev)));
+        }
+    }
+}
+
+static void icc_device_class_init(ObjectClass *oc, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(oc);
+
+    dc->realize = icc_device_realize;
+    dc->bus_type = TYPE_ICC_BUS;
+}
+
+static const TypeInfo icc_device_info = {
+    .name = TYPE_ICC_DEVICE,
+    .parent = TYPE_DEVICE,
+    .abstract = true,
+    .instance_size = sizeof(ICCDevice),
+    .class_size = sizeof(ICCDeviceClass),
+    .class_init = icc_device_class_init,
+};
+
+
+/*  icc-bridge implementation */
+
+typedef struct ICCBridgeState {
+    /*< private >*/
+    SysBusDevice parent_obj;
+    /*< public >*/
+
+    ICCBus icc_bus;
+    MemoryRegion apic_container;
+} ICCBridgeState;
+
+#define ICC_BRIGDE(obj) OBJECT_CHECK(ICCBridgeState, (obj), TYPE_ICC_BRIDGE)
+
+static void icc_bridge_init(Object *obj)
+{
+    ICCBridgeState *s = ICC_BRIGDE(obj);
+    SysBusDevice *sb = SYS_BUS_DEVICE(obj);
+
+    qbus_create_inplace(&s->icc_bus, TYPE_ICC_BUS, DEVICE(s), "icc");
+
+    /* Do not change order of registering regions,
+     * APIC must be first registered region, board maps it by 0 index
+     */
+    memory_region_init(&s->apic_container, "icc-apic-container",
+                       APIC_SPACE_SIZE);
+    sysbus_init_mmio(sb, &s->apic_container);
+    s->icc_bus.apic_address_space = &s->apic_container;
+}
+
+static const TypeInfo icc_bridge_info = {
+    .name  = TYPE_ICC_BRIDGE,
+    .parent = TYPE_SYS_BUS_DEVICE,
+    .instance_init  = icc_bridge_init,
+    .instance_size  = sizeof(ICCBridgeState),
+};
+
+
+static void icc_bus_register_types(void)
+{
+    type_register_static(&icc_bus_info);
+    type_register_static(&icc_device_info);
+    type_register_static(&icc_bridge_info);
+}
+
+type_init(icc_bus_register_types)
diff --git a/hw/i386/kvm/apic.c b/hw/i386/kvm/apic.c
index c6ff982..8f80425 100644
--- a/hw/i386/kvm/apic.c
+++ b/hw/i386/kvm/apic.c
@@ -174,7 +174,7 @@
 static void kvm_apic_init(APICCommonState *s)
 {
     memory_region_init_io(&s->io_memory, &kvm_apic_io_ops, s, "kvm-apic-msi",
-                          MSI_SPACE_SIZE);
+                          APIC_SPACE_SIZE);
 
     if (kvm_has_gsi_routing()) {
         msi_supported = true;
diff --git a/hw/i386/kvm/clock.c b/hw/i386/kvm/clock.c
index fa40e28..87d4d0f 100644
--- a/hw/i386/kvm/clock.c
+++ b/hw/i386/kvm/clock.c
@@ -129,7 +129,7 @@
 void kvmclock_create(void)
 {
     if (kvm_enabled() &&
-        first_cpu->cpuid_kvm_features & ((1ULL << KVM_FEATURE_CLOCKSOURCE) |
+        first_cpu->features[FEAT_KVM] & ((1ULL << KVM_FEATURE_CLOCKSOURCE) |
                                          (1ULL << KVM_FEATURE_CLOCKSOURCE2))) {
         sysbus_create_simple("kvmclock", -1, NULL);
     }
diff --git a/hw/i386/kvmvapic.c b/hw/i386/kvmvapic.c
index 3a10c07..5b558aa 100644
--- a/hw/i386/kvmvapic.c
+++ b/hw/i386/kvmvapic.c
@@ -12,6 +12,7 @@
 #include "sysemu/cpus.h"
 #include "sysemu/kvm.h"
 #include "hw/i386/apic_internal.h"
+#include "hw/sysbus.h"
 
 #define VAPIC_IO_PORT           0x7e
 
diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index 29d2703..197d218 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -53,6 +53,8 @@
 #include "qemu/bitmap.h"
 #include "qemu/config-file.h"
 #include "hw/acpi/acpi.h"
+#include "hw/cpu/icc_bus.h"
+#include "hw/boards.h"
 
 /* debug PC/ISA interrupts */
 //#define DEBUG_IRQ
@@ -338,6 +340,21 @@
     qemu_unregister_reset(pc_cmos_init_late, opaque);
 }
 
+typedef struct RTCCPUHotplugArg {
+    Notifier cpu_added_notifier;
+    ISADevice *rtc_state;
+} RTCCPUHotplugArg;
+
+static void rtc_notify_cpu_added(Notifier *notifier, void *data)
+{
+    RTCCPUHotplugArg *arg = container_of(notifier, RTCCPUHotplugArg,
+                                         cpu_added_notifier);
+    ISADevice *s = arg->rtc_state;
+
+    /* increment the number of CPUs */
+    rtc_set_memory(s, 0x5f, rtc_get_memory(s, 0x5f) + 1);
+}
+
 void pc_cmos_init(ram_addr_t ram_size, ram_addr_t above_4g_mem_size,
                   const char *boot_device,
                   ISADevice *floppy, BusState *idebus0, BusState *idebus1,
@@ -346,6 +363,7 @@
     int val, nb, i;
     FDriveType fd_type[2] = { FDRIVE_DRV_NONE, FDRIVE_DRV_NONE };
     static pc_cmos_init_late_arg arg;
+    static RTCCPUHotplugArg cpu_hotplug_cb;
 
     /* various important CMOS locations needed by PC/Bochs bios */
 
@@ -384,6 +402,10 @@
 
     /* set the number of CPU */
     rtc_set_memory(s, 0x5f, smp_cpus - 1);
+    /* init CPU hotplug notifier */
+    cpu_hotplug_cb.rtc_state = s;
+    cpu_hotplug_cb.cpu_added_notifier.notify = rtc_notify_cpu_added;
+    qemu_register_cpu_added_notifier(&cpu_hotplug_cb.cpu_added_notifier);
 
     /* set boot devices, and disable floppy signature check if requested */
     if (set_boot_dev(s, boot_device, fd_bootchk)) {
@@ -874,9 +896,59 @@
     }
 }
 
-void pc_cpus_init(const char *cpu_model)
+static X86CPU *pc_new_cpu(const char *cpu_model, int64_t apic_id,
+                          DeviceState *icc_bridge, Error **errp)
+{
+    X86CPU *cpu;
+    Error *local_err = NULL;
+
+    cpu = cpu_x86_create(cpu_model, icc_bridge, errp);
+    if (!cpu) {
+        return cpu;
+    }
+
+    object_property_set_int(OBJECT(cpu), apic_id, "apic-id", &local_err);
+    object_property_set_bool(OBJECT(cpu), true, "realized", &local_err);
+
+    if (local_err) {
+        if (cpu != NULL) {
+            object_unref(OBJECT(cpu));
+            cpu = NULL;
+        }
+        error_propagate(errp, local_err);
+    }
+    return cpu;
+}
+
+static const char *current_cpu_model;
+
+void pc_hot_add_cpu(const int64_t id, Error **errp)
+{
+    DeviceState *icc_bridge;
+    int64_t apic_id = x86_cpu_apic_id_from_index(id);
+
+    if (cpu_exists(apic_id)) {
+        error_setg(errp, "Unable to add CPU: %" PRIi64
+                   ", it already exists", id);
+        return;
+    }
+
+    if (id >= max_cpus) {
+        error_setg(errp, "Unable to add CPU: %" PRIi64
+                   ", max allowed: %d", id, max_cpus - 1);
+        return;
+    }
+
+    icc_bridge = DEVICE(object_resolve_path_type("icc-bridge",
+                                                 TYPE_ICC_BRIDGE, NULL));
+    pc_new_cpu(current_cpu_model, apic_id, icc_bridge, errp);
+}
+
+void pc_cpus_init(const char *cpu_model, DeviceState *icc_bridge)
 {
     int i;
+    X86CPU *cpu = NULL;
+    Error *error = NULL;
 
     /* init CPUs */
     if (cpu_model == NULL) {
@@ -886,12 +958,24 @@
         cpu_model = "qemu32";
 #endif
     }
+    current_cpu_model = cpu_model;
 
     for (i = 0; i < smp_cpus; i++) {
-        if (!cpu_x86_init(cpu_model)) {
+        cpu = pc_new_cpu(cpu_model, x86_cpu_apic_id_from_index(i),
+                         icc_bridge, &error);
+        if (error) {
+            fprintf(stderr, "%s\n", error_get_pretty(error));
+            error_free(error);
             exit(1);
         }
     }
+
+    /* map APIC MMIO area if CPU has APIC */
+    if (cpu && cpu->env.apic_state) {
+        /* XXX: what if the base changes? */
+        sysbus_mmio_map_overlap(SYS_BUS_DEVICE(icc_bridge), 0,
+                                APIC_DEFAULT_ADDRESS, 0x1000);
+    }
 }
 
 void pc_acpi_init(const char *default_dsdt)
diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c
index 852d63b..fe52e5f 100644
--- a/hw/i386/pc_piix.c
+++ b/hw/i386/pc_piix.c
@@ -37,6 +37,7 @@
 #include "hw/kvm/clock.h"
 #include "sysemu/sysemu.h"
 #include "hw/sysbus.h"
+#include "hw/cpu/icc_bus.h"
 #include "sysemu/arch_init.h"
 #include "sysemu/blockdev.h"
 #include "hw/i2c/smbus.h"
@@ -87,9 +88,14 @@
     MemoryRegion *ram_memory;
     MemoryRegion *pci_memory;
     MemoryRegion *rom_memory;
+    DeviceState *icc_bridge;
     void *fw_cfg = NULL;
 
-    pc_cpus_init(cpu_model);
+    icc_bridge = qdev_create(NULL, TYPE_ICC_BRIDGE);
+    object_property_add_child(qdev_get_machine(), "icc-bridge",
+                              OBJECT(icc_bridge), NULL);
+
+    pc_cpus_init(cpu_model, icc_bridge);
     pc_acpi_init("acpi-dsdt.aml");
 
     if (kvmclock_enabled) {
@@ -163,6 +169,7 @@
     if (pci_enabled) {
         ioapic_init_gsi(gsi_state, "i440fx");
     }
+    qdev_init_nofail(icc_bridge);
 
     pc_register_ferr_irq(gsi[13]);
 
@@ -328,6 +335,7 @@
     .alias = "pc",
     .desc = "Standard PC (i440FX + PIIX, 1996)",
     .init = pc_init_pci,
+    .hot_add_cpu = pc_hot_add_cpu,
     .max_cpus = 255,
     .is_default = 1,
     DEFAULT_MACHINE_OPTIONS,
diff --git a/hw/i386/pc_q35.c b/hw/i386/pc_q35.c
index d094041..52511e2 100644
--- a/hw/i386/pc_q35.c
+++ b/hw/i386/pc_q35.c
@@ -41,6 +41,7 @@
 #include "hw/ide/pci.h"
 #include "hw/ide/ahci.h"
 #include "hw/usb.h"
+#include "hw/cpu/icc_bus.h"
 
 /* ICH9 AHCI has 6 ports */
 #define MAX_SATA_PORTS     6
@@ -75,8 +76,13 @@
     int i;
     ICH9LPCState *ich9_lpc;
     PCIDevice *ahci;
+    DeviceState *icc_bridge;
 
-    pc_cpus_init(cpu_model);
+    icc_bridge = qdev_create(NULL, TYPE_ICC_BRIDGE);
+    object_property_add_child(qdev_get_machine(), "icc-bridge",
+                              OBJECT(icc_bridge), NULL);
+
+    pc_cpus_init(cpu_model, icc_bridge);
     pc_acpi_init("q35-acpi-dsdt.aml");
 
     kvmclock_create();
@@ -158,6 +164,7 @@
     if (pci_enabled) {
         ioapic_init_gsi(gsi_state, NULL);
     }
+    qdev_init_nofail(icc_bridge);
 
     pc_register_ferr_irq(gsi[13]);
 
@@ -213,6 +220,7 @@
     .alias = "q35",
     .desc = "Standard PC (Q35 + ICH9, 2009)",
     .init = pc_q35_init,
+    .hot_add_cpu = pc_hot_add_cpu,
     .max_cpus = 255,
     DEFAULT_MACHINE_OPTIONS,
 };
diff --git a/hw/intc/apic.c b/hw/intc/apic.c
index 2d79a9e..756dff0 100644
--- a/hw/intc/apic.c
+++ b/hw/intc/apic.c
@@ -874,7 +874,7 @@
 static void apic_init(APICCommonState *s)
 {
     memory_region_init_io(&s->io_memory, &apic_io_ops, s, "apic-msi",
-                          MSI_SPACE_SIZE);
+                          APIC_SPACE_SIZE);
 
     s->timer = qemu_new_timer_ns(vm_clock, apic_timer, s);
     local_apics[s->idx] = s;
diff --git a/hw/intc/apic_common.c b/hw/intc/apic_common.c
index e0ae07a..b03e904 100644
--- a/hw/intc/apic_common.c
+++ b/hw/intc/apic_common.c
@@ -21,6 +21,8 @@
 #include "hw/i386/apic_internal.h"
 #include "trace.h"
 #include "sysemu/kvm.h"
+#include "hw/qdev.h"
+#include "hw/sysbus.h"
 
 static int apic_irq_delivered;
 bool apic_report_tpr_access;
@@ -282,12 +284,13 @@
     return 0;
 }
 
-static int apic_init_common(SysBusDevice *dev)
+static int apic_init_common(ICCDevice *dev)
 {
     APICCommonState *s = APIC_COMMON(dev);
     APICCommonClass *info;
     static DeviceState *vapic;
     static int apic_no;
+    static bool mmio_registered;
 
     if (apic_no >= MAX_APICS) {
         return -1;
@@ -296,8 +299,11 @@
 
     info = APIC_COMMON_GET_CLASS(s);
     info->init(s);
-
-    sysbus_init_mmio(dev, &s->io_memory);
+    if (!mmio_registered) {
+        ICCBus *b = ICC_BUS(qdev_get_parent_bus(DEVICE(dev)));
+        memory_region_add_subregion(b->apic_address_space, 0, &s->io_memory);
+        mmio_registered = true;
+    }
 
     /* Note: We need at least 1M to map the VAPIC option ROM */
     if (!vapic && s->vapic_control & VAPIC_ENABLE_MASK &&
@@ -375,19 +381,19 @@
 
 static void apic_common_class_init(ObjectClass *klass, void *data)
 {
-    SysBusDeviceClass *sc = SYS_BUS_DEVICE_CLASS(klass);
+    ICCDeviceClass *idc = ICC_DEVICE_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);
 
     dc->vmsd = &vmstate_apic_common;
     dc->reset = apic_reset_common;
     dc->no_user = 1;
     dc->props = apic_properties_common;
-    sc->init = apic_init_common;
+    idc->init = apic_init_common;
 }
 
 static const TypeInfo apic_common_type = {
     .name = TYPE_APIC_COMMON,
-    .parent = TYPE_SYS_BUS_DEVICE,
+    .parent = TYPE_ICC_DEVICE,
     .instance_size = sizeof(APICCommonState),
     .class_size = sizeof(APICCommonClass),
     .class_init = apic_common_class_init,
diff --git a/hw/timer/mc146818rtc.c b/hw/timer/mc146818rtc.c
index afbd0db..481604d 100644
--- a/hw/timer/mc146818rtc.c
+++ b/hw/timer/mc146818rtc.c
@@ -680,6 +680,13 @@
         s->cmos_data[addr] = val;
 }
 
+int rtc_get_memory(ISADevice *dev, int addr)
+{
+    RTCState *s = MC146818_RTC(dev);
+    assert(addr >= 0 && addr <= 127);
+    return s->cmos_data[addr];
+}
+
 static void rtc_set_date_from_host(ISADevice *dev)
 {
     RTCState *s = MC146818_RTC(dev);
diff --git a/hw/xen/xen_apic.c b/hw/xen/xen_apic.c
index a2eb8a1..a958782 100644
--- a/hw/xen/xen_apic.c
+++ b/hw/xen/xen_apic.c
@@ -39,7 +39,7 @@
 static void xen_apic_init(APICCommonState *s)
 {
     memory_region_init_io(&s->io_memory, &xen_apic_io_ops, s, "xen-apic-msi",
-                          MSI_SPACE_SIZE);
+                          APIC_SPACE_SIZE);
 
 #if defined(CONFIG_XEN_CTRL_INTERFACE_VERSION) \
     && CONFIG_XEN_CTRL_INTERFACE_VERSION >= 420
diff --git a/include/hw/boards.h b/include/hw/boards.h
index 425bdc7..fb7c6f1 100644
--- a/include/hw/boards.h
+++ b/include/hw/boards.h
@@ -22,12 +22,15 @@
 
 typedef void QEMUMachineResetFunc(void);
 
+typedef void QEMUMachineHotAddCPUFunc(const int64_t id, Error **errp);
+
 typedef struct QEMUMachine {
     const char *name;
     const char *alias;
     const char *desc;
     QEMUMachineInitFunc *init;
     QEMUMachineResetFunc *reset;
+    QEMUMachineHotAddCPUFunc *hot_add_cpu;
     BlockInterfaceType block_default_type;
     int max_cpus;
     unsigned int no_serial:1,
diff --git a/include/hw/cpu/icc_bus.h b/include/hw/cpu/icc_bus.h
new file mode 100644
index 0000000..b550070
--- /dev/null
+++ b/include/hw/cpu/icc_bus.h
@@ -0,0 +1,82 @@
+/* icc_bus.h
+ * emulate x86 ICC (Interrupt Controller Communications) bus
+ *
+ * Copyright (c) 2013 Red Hat, Inc
+ *
+ * Authors:
+ *     Igor Mammedov <imammedo@redhat.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>
+ */
+#ifndef ICC_BUS_H
+#define ICC_BUS_H
+
+#include "exec/memory.h"
+#include "hw/qdev-core.h"
+
+#define TYPE_ICC_BUS "icc-bus"
+
+#ifndef CONFIG_USER_ONLY
+
+/**
+ * ICCBus:
+ *
+ * ICC bus
+ */
+typedef struct ICCBus {
+    /*< private >*/
+    BusState parent_obj;
+    /*< public >*/
+
+    MemoryRegion *apic_address_space;
+} ICCBus;
+
+#define ICC_BUS(obj) OBJECT_CHECK(ICCBus, (obj), TYPE_ICC_BUS)
+
+/**
+ * ICCDevice:
+ *
+ * ICC device
+ */
+typedef struct ICCDevice {
+    /*< private >*/
+    DeviceState qdev;
+    /*< public >*/
+} ICCDevice;
+
+/**
+ * ICCDeviceClass:
+ * @init: Initialization callback for derived classes.
+ *
+ * ICC device class
+ */
+typedef struct ICCDeviceClass {
+    /*< private >*/
+    DeviceClass parent_class;
+    /*< public >*/
+
+    int (*init)(ICCDevice *dev); /* TODO replace with QOM realize */
+} ICCDeviceClass;
+
+#define TYPE_ICC_DEVICE "icc-device"
+#define ICC_DEVICE(obj) OBJECT_CHECK(ICCDevice, (obj), TYPE_ICC_DEVICE)
+#define ICC_DEVICE_CLASS(klass) \
+     OBJECT_CLASS_CHECK(ICCDeviceClass, (klass), TYPE_ICC_DEVICE)
+#define ICC_DEVICE_GET_CLASS(obj) \
+     OBJECT_GET_CLASS(ICCDeviceClass, (obj), TYPE_ICC_DEVICE)
+
+#define TYPE_ICC_BRIDGE "icc-bridge"
+
+#endif /* CONFIG_USER_ONLY */
+#endif
diff --git a/include/hw/i386/apic_internal.h b/include/hw/i386/apic_internal.h
index 578241f..1b0a7fb 100644
--- a/include/hw/i386/apic_internal.h
+++ b/include/hw/i386/apic_internal.h
@@ -21,7 +21,7 @@
 #define QEMU_APIC_INTERNAL_H
 
 #include "exec/memory.h"
-#include "hw/sysbus.h"
+#include "hw/cpu/icc_bus.h"
 #include "qemu/timer.h"
 
 /* APIC Local Vector Table */
@@ -66,8 +66,6 @@
 
 #define MAX_APICS 255
 
-#define MSI_SPACE_SIZE                  0x100000
-
 typedef struct APICCommonState APICCommonState;
 
 #define TYPE_APIC_COMMON "apic-common"
@@ -80,7 +78,7 @@
 
 typedef struct APICCommonClass
 {
-    SysBusDeviceClass parent_class;
+    ICCDeviceClass parent_class;
 
     void (*init)(APICCommonState *s);
     void (*set_base)(APICCommonState *s, uint64_t val);
@@ -94,7 +92,7 @@
 } APICCommonClass;
 
 struct APICCommonState {
-    SysBusDevice busdev;
+    ICCDevice busdev;
 
     MemoryRegion io_memory;
     X86CPU *cpu;
diff --git a/include/hw/i386/pc.h b/include/hw/i386/pc.h
index dd6bc24..41869e5 100644
--- a/include/hw/i386/pc.h
+++ b/include/hw/i386/pc.h
@@ -78,7 +78,8 @@
 void pc_register_ferr_irq(qemu_irq irq);
 void pc_acpi_smi_interrupt(void *opaque, int irq, int level);
 
-void pc_cpus_init(const char *cpu_model);
+void pc_cpus_init(const char *cpu_model, DeviceState *icc_bridge);
+void pc_hot_add_cpu(const int64_t id, Error **errp);
 void pc_acpi_init(const char *default_dsdt);
 void *pc_memory_init(MemoryRegion *system_memory,
                     const char *kernel_filename,
diff --git a/include/hw/timer/mc146818rtc.h b/include/hw/timer/mc146818rtc.h
index 425bd17..753dda6 100644
--- a/include/hw/timer/mc146818rtc.h
+++ b/include/hw/timer/mc146818rtc.h
@@ -8,6 +8,7 @@
 
 ISADevice *rtc_init(ISABus *bus, int base_year, qemu_irq intercept_irq);
 void rtc_set_memory(ISADevice *dev, int addr, int val);
+int rtc_get_memory(ISADevice *dev, int addr);
 void rtc_set_date(ISADevice *dev, const struct tm *tm);
 
 #endif /* !MC146818RTC_H */
diff --git a/include/qom/cpu.h b/include/qom/cpu.h
index 3664a1b..7cd9442 100644
--- a/include/qom/cpu.h
+++ b/include/qom/cpu.h
@@ -24,6 +24,8 @@
 #include "hw/qdev-core.h"
 #include "qemu/thread.h"
 
+typedef int (*WriteCoreDumpFunction)(void *buf, size_t size, void *opaque);
+
 /**
  * SECTION:cpu
  * @section_id: QEMU-cpu
@@ -45,6 +47,7 @@
  * instantiatable CPU type.
  * @reset: Callback to reset the #CPUState to its initial state.
  * @do_interrupt: Callback for interrupt handling.
+ * @get_arch_id: Callback for getting architecture-dependent CPU ID.
  * @vmsd: State description for migration.
  *
  * Represents a CPU family or model.
@@ -58,8 +61,17 @@
 
     void (*reset)(CPUState *cpu);
     void (*do_interrupt)(CPUState *cpu);
+    int64_t (*get_arch_id)(CPUState *cpu);
 
     const struct VMStateDescription *vmsd;
+    int (*write_elf64_note)(WriteCoreDumpFunction f, CPUState *cpu,
+                            int cpuid, void *opaque);
+    int (*write_elf64_qemunote)(WriteCoreDumpFunction f, CPUState *cpu,
+                                void *opaque);
+    int (*write_elf32_note)(WriteCoreDumpFunction f, CPUState *cpu,
+                            int cpuid, void *opaque);
+    int (*write_elf32_qemunote)(WriteCoreDumpFunction f, CPUState *cpu,
+                                void *opaque);
 } CPUClass;
 
 struct KVMState;
@@ -125,6 +137,45 @@
     uint32_t halted; /* used by alpha, cris, ppc TCG */
 };
 
+/**
+ * cpu_write_elf64_note:
+ * @f: pointer to a function that writes memory to a file
+ * @cpu: The CPU whose memory is to be dumped
+ * @cpuid: ID number of the CPU
+ * @opaque: pointer to the CPUState struct
+ */
+int cpu_write_elf64_note(WriteCoreDumpFunction f, CPUState *cpu,
+                         int cpuid, void *opaque);
+
+/**
+ * cpu_write_elf64_qemunote:
+ * @f: pointer to a function that writes memory to a file
+ * @cpu: The CPU whose memory is to be dumped
+ * @cpuid: ID number of the CPU
+ * @opaque: pointer to the CPUState struct
+ */
+int cpu_write_elf64_qemunote(WriteCoreDumpFunction f, CPUState *cpu,
+                             void *opaque);
+
+/**
+ * cpu_write_elf32_note:
+ * @f: pointer to a function that writes memory to a file
+ * @cpu: The CPU whose memory is to be dumped
+ * @cpuid: ID number of the CPU
+ * @opaque: pointer to the CPUState struct
+ */
+int cpu_write_elf32_note(WriteCoreDumpFunction f, CPUState *cpu,
+                         int cpuid, void *opaque);
+
+/**
+ * cpu_write_elf32_qemunote:
+ * @f: pointer to a function that writes memory to a file
+ * @cpu: The CPU whose memory is to be dumped
+ * @cpuid: ID number of the CPU
+ * @opaque: pointer to the CPUState struct
+ */
+int cpu_write_elf32_qemunote(WriteCoreDumpFunction f, CPUState *cpu,
+                             void *opaque);
 
 /**
  * cpu_reset:
@@ -214,6 +265,15 @@
 void run_on_cpu(CPUState *cpu, void (*func)(void *data), void *data);
 
 /**
+ * qemu_for_each_cpu:
+ * @func: The function to be executed.
+ * @data: Data to pass to the function.
+ *
+ * Executes @func for each CPU.
+ */
+void qemu_for_each_cpu(void (*func)(CPUState *cpu, void *data), void *data);
+
+/**
  * qemu_get_cpu:
  * @index: The CPUState@cpu_index value of the CPU to obtain.
  *
@@ -223,6 +283,16 @@
  */
 CPUState *qemu_get_cpu(int index);
 
+/**
+ * cpu_exists:
+ * @id: Guest-exposed CPU ID to lookup.
+ *
+ * Search for CPU with specified ID.
+ *
+ * Returns: %true - CPU is found, %false - CPU isn't found.
+ */
+bool cpu_exists(int64_t id);
+
 #ifndef CONFIG_USER_ONLY
 
 typedef void (*CPUInterruptHandler)(CPUState *, int);
@@ -256,5 +326,12 @@
  */
 void cpu_reset_interrupt(CPUState *cpu, int mask);
 
+/**
+ * cpu_resume:
+ * @cpu: The CPU to resume.
+ *
+ * Resumes CPU, i.e. puts CPU into runnable state.
+ */
+void cpu_resume(CPUState *cpu);
 
 #endif
diff --git a/include/sysemu/dump.h b/include/sysemu/dump.h
index e25b7cf..b8c770f 100644
--- a/include/sysemu/dump.h
+++ b/include/sysemu/dump.h
@@ -20,15 +20,6 @@
     int d_class;    /* ELFCLASS32 or ELFCLASS64 */
 } ArchDumpInfo;
 
-typedef int (*write_core_dump_function)(void *buf, size_t size, void *opaque);
-int cpu_write_elf64_note(write_core_dump_function f, CPUArchState *env,
-                                                  int cpuid, void *opaque);
-int cpu_write_elf32_note(write_core_dump_function f, CPUArchState *env,
-                                                  int cpuid, void *opaque);
-int cpu_write_elf64_qemunote(write_core_dump_function f, CPUArchState *env,
-                                                          void *opaque);
-int cpu_write_elf32_qemunote(write_core_dump_function f, CPUArchState *env,
-                                                          void *opaque);
 int cpu_get_dump_info(ArchDumpInfo *info);
 ssize_t cpu_get_note_size(int class, int machine, int nr_cpus);
 
diff --git a/include/sysemu/kvm.h b/include/sysemu/kvm.h
index 75bd7d9..9735c1d 100644
--- a/include/sysemu/kvm.h
+++ b/include/sysemu/kvm.h
@@ -144,11 +144,11 @@
 #if !defined(CONFIG_USER_ONLY)
 void *kvm_vmalloc(ram_addr_t size);
 void *kvm_arch_vmalloc(ram_addr_t size);
-void kvm_setup_guest_memory(void *start, size_t size);
-
-void kvm_flush_coalesced_mmio_buffer(void);
 #endif
 
+void kvm_setup_guest_memory(void *start, size_t size);
+void kvm_flush_coalesced_mmio_buffer(void);
+
 int kvm_insert_breakpoint(CPUArchState *current_env, target_ulong addr,
                           target_ulong len, int type);
 int kvm_remove_breakpoint(CPUArchState *current_env, target_ulong addr,
@@ -250,8 +250,6 @@
 uint32_t kvm_arch_get_supported_cpuid(KVMState *env, uint32_t function,
                                       uint32_t index, int reg);
 void kvm_cpu_synchronize_state(CPUArchState *env);
-void kvm_cpu_synchronize_post_reset(CPUState *cpu);
-void kvm_cpu_synchronize_post_init(CPUState *cpu);
 
 /* generic hooks - to be moved/refactored once there are more users */
 
@@ -262,6 +260,16 @@
     }
 }
 
+#if !defined(CONFIG_USER_ONLY)
+int kvm_physical_memory_addr_from_host(KVMState *s, void *ram_addr,
+                                       hwaddr *phys_addr);
+#endif
+
+#endif /* NEED_CPU_H */
+
+void kvm_cpu_synchronize_post_reset(CPUState *cpu);
+void kvm_cpu_synchronize_post_init(CPUState *cpu);
+
 static inline void cpu_synchronize_post_reset(CPUState *cpu)
 {
     if (kvm_enabled()) {
@@ -276,14 +284,6 @@
     }
 }
 
-
-#if !defined(CONFIG_USER_ONLY)
-int kvm_physical_memory_addr_from_host(KVMState *s, void *ram_addr,
-                                       hwaddr *phys_addr);
-#endif
-
-#endif
-
 int kvm_irqchip_add_msi_route(KVMState *s, MSIMessage msg);
 int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg);
 void kvm_irqchip_release_virq(KVMState *s, int virq);
diff --git a/include/sysemu/sysemu.h b/include/sysemu/sysemu.h
index 010e412..2fb71af 100644
--- a/include/sysemu/sysemu.h
+++ b/include/sysemu/sysemu.h
@@ -153,6 +153,9 @@
 /* generic hotplug */
 void drive_hot_add(Monitor *mon, const QDict *qdict);
 
+/* CPU hotplug */
+void qemu_register_cpu_added_notifier(Notifier *notifier);
+
 /* pcie aer error injection */
 void pcie_aer_inject_error_print(Monitor *mon, const QObject *data);
 int do_pcie_aer_inject_error(Monitor *mon,
diff --git a/kvm-all.c b/kvm-all.c
index 2d92721..f6c0f4a 100644
--- a/kvm-all.c
+++ b/kvm-all.c
@@ -109,6 +109,7 @@
 bool kvm_irqfds_allowed;
 bool kvm_msi_via_irqfd_allowed;
 bool kvm_gsi_routing_allowed;
+bool kvm_allowed;
 
 static const KVMCapabilityInfo kvm_required_capabilites[] = {
     KVM_CAP_INFO(USER_MEMORY),
diff --git a/kvm-stub.c b/kvm-stub.c
index 5f52186..b2c8f9b 100644
--- a/kvm-stub.c
+++ b/kvm-stub.c
@@ -12,16 +12,20 @@
 
 #include "qemu-common.h"
 #include "hw/hw.h"
-#include "hw/pci/msi.h"
 #include "cpu.h"
 #include "sysemu/kvm.h"
 
+#ifndef CONFIG_USER_ONLY
+#include "hw/pci/msi.h"
+#endif
+
 KVMState *kvm_state;
 bool kvm_kernel_irqchip;
 bool kvm_async_interrupts_allowed;
 bool kvm_irqfds_allowed;
 bool kvm_msi_via_irqfd_allowed;
 bool kvm_gsi_routing_allowed;
+bool kvm_allowed;
 
 int kvm_init_vcpu(CPUState *cpu)
 {
@@ -111,6 +115,7 @@
     return 1;
 }
 
+#ifndef CONFIG_USER_ONLY
 int kvm_irqchip_add_msi_route(KVMState *s, MSIMessage msg)
 {
     return -ENOSYS;
@@ -134,3 +139,4 @@
 {
     return -ENOSYS;
 }
+#endif
diff --git a/linux-user/elfload.c b/linux-user/elfload.c
index 979b57c..ddef23e 100644
--- a/linux-user/elfload.c
+++ b/linux-user/elfload.c
@@ -137,7 +137,7 @@
 
 static uint32_t get_elf_hwcap(void)
 {
-    return thread_env->cpuid_features;
+    return thread_env->features[FEAT_1_EDX];
 }
 
 #ifdef TARGET_X86_64
diff --git a/linux-user/main.c b/linux-user/main.c
index 4e92a0b..b97b8cf 100644
--- a/linux-user/main.c
+++ b/linux-user/main.c
@@ -3764,13 +3764,13 @@
 
     env->cr[0] = CR0_PG_MASK | CR0_WP_MASK | CR0_PE_MASK;
     env->hflags |= HF_PE_MASK;
-    if (env->cpuid_features & CPUID_SSE) {
+    if (env->features[FEAT_1_EDX] & CPUID_SSE) {
         env->cr[4] |= CR4_OSFXSR_MASK;
         env->hflags |= HF_OSFXSR_MASK;
     }
 #ifndef TARGET_ABI32
     /* enable 64 bit mode if possible */
-    if (!(env->cpuid_ext2_features & CPUID_EXT2_LM)) {
+    if (!(env->features[FEAT_8000_0001_EDX] & CPUID_EXT2_LM)) {
         fprintf(stderr, "The selected x86 CPU does not support 64 bit mode\n");
         exit(1);
     }
diff --git a/qapi-schema.json b/qapi-schema.json
index 65be8f4..7797400 100644
--- a/qapi-schema.json
+++ b/qapi-schema.json
@@ -1390,6 +1390,19 @@
 { 'command': 'cpu', 'data': {'index': 'int'} }
 
 ##
+# @cpu-add
+#
+# Adds CPU with specified ID
+#
+# @id: ID of CPU to be created, valid values [0..max_cpus)
+#
+# Returns: Nothing on success
+#
+# Since 1.5
+##
+{ 'command': 'cpu-add', 'data': {'id': 'int'} }
+
+##
 # @memsave:
 #
 # Save a portion of guest memory to a file.
diff --git a/qmp-commands.hx b/qmp-commands.hx
index d15bec1..ffd130e 100644
--- a/qmp-commands.hx
+++ b/qmp-commands.hx
@@ -385,6 +385,29 @@
 EQMP
 
     {
+        .name       = "cpu-add",
+        .args_type  = "id:i",
+        .mhandler.cmd_new = qmp_marshal_input_cpu_add,
+    },
+
+SQMP
+cpu-add
+-------
+
+Adds virtual cpu
+
+Arguments:
+
+- "id": cpu id (json-int)
+
+Example:
+
+-> { "execute": "cpu-add", "arguments": { "id": 2 } }
+<- { "return": {} }
+
+EQMP
+
+    {
         .name       = "memsave",
         .args_type  = "val:l,size:i,filename:s,cpu:i?",
         .mhandler.cmd_new = qmp_marshal_input_memsave,
diff --git a/qmp.c b/qmp.c
index 4676993..4c149b3 100644
--- a/qmp.c
+++ b/qmp.c
@@ -24,6 +24,7 @@
 #include "hw/qdev.h"
 #include "sysemu/blockdev.h"
 #include "qom/qom-qobject.h"
+#include "hw/boards.h"
 
 NameInfo *qmp_query_name(Error **errp)
 {
@@ -108,6 +109,15 @@
     /* Just do nothing */
 }
 
+void qmp_cpu_add(int64_t id, Error **errp)
+{
+    if (current_machine->hot_add_cpu) {
+        current_machine->hot_add_cpu(id, errp);
+    } else {
+        error_setg(errp, "Not supported");
+    }
+}
+
 #ifndef CONFIG_VNC
 /* If VNC support is enabled, the "true" query-vnc command is
    defined in the VNC subsystem */
diff --git a/qom/cpu.c b/qom/cpu.c
index e242dcb..04aefbb 100644
--- a/qom/cpu.c
+++ b/qom/cpu.c
@@ -20,12 +20,109 @@
 
 #include "qom/cpu.h"
 #include "qemu-common.h"
+#include "sysemu/kvm.h"
+#include "qemu/notify.h"
+#include "sysemu/sysemu.h"
+
+typedef struct CPUExistsArgs {
+    int64_t id;
+    bool found;
+} CPUExistsArgs;
+
+static void cpu_exist_cb(CPUState *cpu, void *data)
+{
+    CPUClass *klass = CPU_GET_CLASS(cpu);
+    CPUExistsArgs *arg = data;
+
+    if (klass->get_arch_id(cpu) == arg->id) {
+        arg->found = true;
+    }
+}
+
+bool cpu_exists(int64_t id)
+{
+    CPUExistsArgs data = {
+        .id = id,
+        .found = false,
+    };
+
+    qemu_for_each_cpu(cpu_exist_cb, &data);
+    return data.found;
+}
+
+/* CPU hot-plug notifiers */
+static NotifierList cpu_added_notifiers =
+    NOTIFIER_LIST_INITIALIZER(cpu_add_notifiers);
+
+void qemu_register_cpu_added_notifier(Notifier *notifier)
+{
+    notifier_list_add(&cpu_added_notifiers, notifier);
+}
 
 void cpu_reset_interrupt(CPUState *cpu, int mask)
 {
     cpu->interrupt_request &= ~mask;
 }
 
+int cpu_write_elf32_qemunote(WriteCoreDumpFunction f, CPUState *cpu,
+                             void *opaque)
+{
+    CPUClass *cc = CPU_GET_CLASS(cpu);
+
+    return (*cc->write_elf32_qemunote)(f, cpu, opaque);
+}
+
+static int cpu_common_write_elf32_qemunote(WriteCoreDumpFunction f,
+                                           CPUState *cpu, void *opaque)
+{
+    return -1;
+}
+
+int cpu_write_elf32_note(WriteCoreDumpFunction f, CPUState *cpu,
+                         int cpuid, void *opaque)
+{
+    CPUClass *cc = CPU_GET_CLASS(cpu);
+
+    return (*cc->write_elf32_note)(f, cpu, cpuid, opaque);
+}
+
+static int cpu_common_write_elf32_note(WriteCoreDumpFunction f,
+                                       CPUState *cpu, int cpuid,
+                                       void *opaque)
+{
+    return -1;
+}
+
+int cpu_write_elf64_qemunote(WriteCoreDumpFunction f, CPUState *cpu,
+                             void *opaque)
+{
+    CPUClass *cc = CPU_GET_CLASS(cpu);
+
+    return (*cc->write_elf64_qemunote)(f, cpu, opaque);
+}
+
+static int cpu_common_write_elf64_qemunote(WriteCoreDumpFunction f,
+                                           CPUState *cpu, void *opaque)
+{
+    return -1;
+}
+
+int cpu_write_elf64_note(WriteCoreDumpFunction f, CPUState *cpu,
+                         int cpuid, void *opaque)
+{
+    CPUClass *cc = CPU_GET_CLASS(cpu);
+
+    return (*cc->write_elf64_note)(f, cpu, cpuid, opaque);
+}
+
+static int cpu_common_write_elf64_note(WriteCoreDumpFunction f,
+                                       CPUState *cpu, int cpuid,
+                                       void *opaque)
+{
+    return -1;
+}
+
+
 void cpu_reset(CPUState *cpu)
 {
     CPUClass *klass = CPU_GET_CLASS(cpu);
@@ -57,6 +154,18 @@
 
 static void cpu_common_realizefn(DeviceState *dev, Error **errp)
 {
+    CPUState *cpu = CPU(dev);
+
+    if (dev->hotplugged) {
+        cpu_synchronize_post_init(cpu);
+        notifier_list_notify(&cpu_added_notifiers, dev);
+        cpu_resume(cpu);
+    }
+}
+
+static int64_t cpu_common_get_arch_id(CPUState *cpu)
+{
+    return cpu->cpu_index;
 }
 
 static void cpu_class_init(ObjectClass *klass, void *data)
@@ -66,6 +175,11 @@
 
     k->class_by_name = cpu_common_class_by_name;
     k->reset = cpu_common_reset;
+    k->get_arch_id = cpu_common_get_arch_id;
+    k->write_elf32_qemunote = cpu_common_write_elf32_qemunote;
+    k->write_elf32_note = cpu_common_write_elf32_note;
+    k->write_elf64_qemunote = cpu_common_write_elf64_qemunote;
+    k->write_elf64_note = cpu_common_write_elf64_note;
     dc->realize = cpu_common_realizefn;
     dc->no_user = 1;
 }
diff --git a/stubs/Makefile.objs b/stubs/Makefile.objs
index 9c55b34..03dff20 100644
--- a/stubs/Makefile.objs
+++ b/stubs/Makefile.objs
@@ -23,3 +23,4 @@
 stub-obj-y += vm-stop.o
 stub-obj-y += vmstate.o
 stub-obj-$(CONFIG_WIN32) += fd-register.o
+stub-obj-y += cpus.o
diff --git a/stubs/cpus.c b/stubs/cpus.c
new file mode 100644
index 0000000..37000dd
--- /dev/null
+++ b/stubs/cpus.c
@@ -0,0 +1,5 @@
+#include "qom/cpu.h"
+
+void cpu_resume(CPUState *cpu)
+{
+}
diff --git a/target-i386/arch_dump.c b/target-i386/arch_dump.c
index 2cd2f7f..83898cd 100644
--- a/target-i386/arch_dump.c
+++ b/target-i386/arch_dump.c
@@ -34,7 +34,7 @@
     char pad3[8];
 } x86_64_elf_prstatus;
 
-static int x86_64_write_elf64_note(write_core_dump_function f,
+static int x86_64_write_elf64_note(WriteCoreDumpFunction f,
                                    CPUArchState *env, int id,
                                    void *opaque)
 {
@@ -144,7 +144,7 @@
     prstatus->pid = id;
 }
 
-static int x86_write_elf64_note(write_core_dump_function f, CPUArchState *env,
+static int x86_write_elf64_note(WriteCoreDumpFunction f, CPUArchState *env,
                                 int id, void *opaque)
 {
     x86_elf_prstatus prstatus;
@@ -179,18 +179,19 @@
     return 0;
 }
 
-int cpu_write_elf64_note(write_core_dump_function f, CPUArchState *env,
-                         int cpuid, void *opaque)
+int x86_cpu_write_elf64_note(WriteCoreDumpFunction f, CPUState *cs,
+                             int cpuid, void *opaque)
 {
+    X86CPU *cpu = X86_CPU(cs);
     int ret;
 #ifdef TARGET_X86_64
     bool lma = !!(first_cpu->hflags & HF_LMA_MASK);
 
     if (lma) {
-        ret = x86_64_write_elf64_note(f, env, cpuid, opaque);
+        ret = x86_64_write_elf64_note(f, &cpu->env, cpuid, opaque);
     } else {
 #endif
-        ret = x86_write_elf64_note(f, env, cpuid, opaque);
+        ret = x86_write_elf64_note(f, &cpu->env, cpuid, opaque);
 #ifdef TARGET_X86_64
     }
 #endif
@@ -198,9 +199,10 @@
     return ret;
 }
 
-int cpu_write_elf32_note(write_core_dump_function f, CPUArchState *env,
-                         int cpuid, void *opaque)
+int x86_cpu_write_elf32_note(WriteCoreDumpFunction f, CPUState *cs,
+                             int cpuid, void *opaque)
 {
+    X86CPU *cpu = X86_CPU(cs);
     x86_elf_prstatus prstatus;
     Elf32_Nhdr *note;
     char *buf;
@@ -208,7 +210,7 @@
     const char *name = "CORE";
     int ret;
 
-    x86_fill_elf_prstatus(&prstatus, env, cpuid);
+    x86_fill_elf_prstatus(&prstatus, &cpu->env, cpuid);
     descsz = sizeof(x86_elf_prstatus);
     note_size = ((sizeof(Elf32_Nhdr) + 3) / 4 + (name_size + 3) / 4 +
                 (descsz + 3) / 4) * 4;
@@ -317,7 +319,7 @@
     s->cr[4] = env->cr[4];
 }
 
-static inline int cpu_write_qemu_note(write_core_dump_function f,
+static inline int cpu_write_qemu_note(WriteCoreDumpFunction f,
                                       CPUArchState *env,
                                       void *opaque,
                                       int type)
@@ -370,16 +372,20 @@
     return 0;
 }
 
-int cpu_write_elf64_qemunote(write_core_dump_function f, CPUArchState *env,
-                             void *opaque)
+int x86_cpu_write_elf64_qemunote(WriteCoreDumpFunction f, CPUState *cs,
+                                 void *opaque)
 {
-    return cpu_write_qemu_note(f, env, opaque, 1);
+    X86CPU *cpu = X86_CPU(cs);
+
+    return cpu_write_qemu_note(f, &cpu->env, opaque, 1);
 }
 
-int cpu_write_elf32_qemunote(write_core_dump_function f, CPUArchState *env,
-                             void *opaque)
+int x86_cpu_write_elf32_qemunote(WriteCoreDumpFunction f, CPUState *cs,
+                                 void *opaque)
 {
-    return cpu_write_qemu_note(f, env, opaque, 0);
+    X86CPU *cpu = X86_CPU(cs);
+
+    return cpu_write_qemu_note(f, &cpu->env, opaque, 0);
 }
 
 int cpu_get_dump_info(ArchDumpInfo *info)
diff --git a/target-i386/cpu-qom.h b/target-i386/cpu-qom.h
index 08f9eb6..f890f1c 100644
--- a/target-i386/cpu-qom.h
+++ b/target-i386/cpu-qom.h
@@ -86,4 +86,13 @@
  */
 void x86_cpu_do_interrupt(CPUState *cpu);
 
+int x86_cpu_write_elf64_note(WriteCoreDumpFunction f, CPUState *cpu,
+                             int cpuid, void *opaque);
+int x86_cpu_write_elf32_note(WriteCoreDumpFunction f, CPUState *cpu,
+                             int cpuid, void *opaque);
+int x86_cpu_write_elf64_qemunote(WriteCoreDumpFunction f, CPUState *cpu,
+                                 void *opaque);
+int x86_cpu_write_elf32_qemunote(WriteCoreDumpFunction f, CPUState *cpu,
+                                 void *opaque);
+
 #endif
diff --git a/target-i386/cpu.c b/target-i386/cpu.c
index e2302d8..9f2adad 100644
--- a/target-i386/cpu.c
+++ b/target-i386/cpu.c
@@ -41,9 +41,10 @@
 #endif
 
 #include "sysemu/sysemu.h"
+#include "hw/qdev-properties.h"
+#include "hw/cpu/icc_bus.h"
 #ifndef CONFIG_USER_ONLY
 #include "hw/xen/xen.h"
-#include "hw/sysbus.h"
 #include "hw/i386/apic_internal.h"
 #endif
 
@@ -349,20 +350,15 @@
 typedef struct x86_def_t {
     const char *name;
     uint32_t level;
+    uint32_t xlevel;
+    uint32_t xlevel2;
     /* vendor is zero-terminated, 12 character ASCII string */
     char vendor[CPUID_VENDOR_SZ + 1];
     int family;
     int model;
     int stepping;
-    uint32_t features, ext_features, ext2_features, ext3_features;
-    uint32_t kvm_features, svm_features;
-    uint32_t xlevel;
+    FeatureWordArray features;
     char model_id[48];
-    /* 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)
@@ -423,13 +419,17 @@
         .family = 6,
         .model = 2,
         .stepping = 3,
-        .features = PPRO_FEATURES |
+        .features[FEAT_1_EDX] =
+            PPRO_FEATURES |
             CPUID_MTRR | CPUID_CLFLUSH | CPUID_MCA |
             CPUID_PSE36,
-        .ext_features = CPUID_EXT_SSE3 | CPUID_EXT_CX16 | CPUID_EXT_POPCNT,
-        .ext2_features = (PPRO_FEATURES & CPUID_EXT2_AMD_ALIASES) |
+        .features[FEAT_1_ECX] =
+            CPUID_EXT_SSE3 | CPUID_EXT_CX16 | CPUID_EXT_POPCNT,
+        .features[FEAT_8000_0001_EDX] =
+            (PPRO_FEATURES & CPUID_EXT2_AMD_ALIASES) |
             CPUID_EXT2_LM | CPUID_EXT2_SYSCALL | CPUID_EXT2_NX,
-        .ext3_features = CPUID_EXT3_LAHF_LM | CPUID_EXT3_SVM |
+        .features[FEAT_8000_0001_ECX] =
+            CPUID_EXT3_LAHF_LM | CPUID_EXT3_SVM |
             CPUID_EXT3_ABM | CPUID_EXT3_SSE4A,
         .xlevel = 0x8000000A,
     },
@@ -440,12 +440,15 @@
         .family = 16,
         .model = 2,
         .stepping = 3,
-        .features = PPRO_FEATURES |
+        .features[FEAT_1_EDX] =
+            PPRO_FEATURES |
             CPUID_MTRR | CPUID_CLFLUSH | CPUID_MCA |
             CPUID_PSE36 | CPUID_VME | CPUID_HT,
-        .ext_features = CPUID_EXT_SSE3 | CPUID_EXT_MONITOR | CPUID_EXT_CX16 |
+        .features[FEAT_1_ECX] =
+            CPUID_EXT_SSE3 | CPUID_EXT_MONITOR | CPUID_EXT_CX16 |
             CPUID_EXT_POPCNT,
-        .ext2_features = (PPRO_FEATURES & CPUID_EXT2_AMD_ALIASES) |
+        .features[FEAT_8000_0001_EDX] =
+            (PPRO_FEATURES & CPUID_EXT2_AMD_ALIASES) |
             CPUID_EXT2_LM | CPUID_EXT2_SYSCALL | CPUID_EXT2_NX |
             CPUID_EXT2_3DNOW | CPUID_EXT2_3DNOWEXT | CPUID_EXT2_MMXEXT |
             CPUID_EXT2_FFXSR | CPUID_EXT2_PDPE1GB | CPUID_EXT2_RDTSCP,
@@ -453,9 +456,11 @@
                     CPUID_EXT3_CR8LEG,
                     CPUID_EXT3_MISALIGNSSE, CPUID_EXT3_3DNOWPREFETCH,
                     CPUID_EXT3_OSVW, CPUID_EXT3_IBS */
-        .ext3_features = CPUID_EXT3_LAHF_LM | CPUID_EXT3_SVM |
+        .features[FEAT_8000_0001_ECX] =
+            CPUID_EXT3_LAHF_LM | CPUID_EXT3_SVM |
             CPUID_EXT3_ABM | CPUID_EXT3_SSE4A,
-        .svm_features = CPUID_SVM_NPT | CPUID_SVM_LBRV,
+        .features[FEAT_SVM] =
+            CPUID_SVM_NPT | CPUID_SVM_LBRV,
         .xlevel = 0x8000001A,
         .model_id = "AMD Phenom(tm) 9550 Quad-Core Processor"
     },
@@ -466,15 +471,19 @@
         .family = 6,
         .model = 15,
         .stepping = 11,
-        .features = PPRO_FEATURES |
+        .features[FEAT_1_EDX] =
+            PPRO_FEATURES |
             CPUID_MTRR | CPUID_CLFLUSH | CPUID_MCA |
             CPUID_PSE36 | CPUID_VME | CPUID_DTS | CPUID_ACPI | CPUID_SS |
             CPUID_HT | CPUID_TM | CPUID_PBE,
-        .ext_features = CPUID_EXT_SSE3 | CPUID_EXT_MONITOR | CPUID_EXT_SSSE3 |
+        .features[FEAT_1_ECX] =
+            CPUID_EXT_SSE3 | CPUID_EXT_MONITOR | CPUID_EXT_SSSE3 |
             CPUID_EXT_DTES64 | CPUID_EXT_DSCPL | CPUID_EXT_VMX | CPUID_EXT_EST |
             CPUID_EXT_TM2 | CPUID_EXT_CX16 | CPUID_EXT_XTPR | CPUID_EXT_PDCM,
-        .ext2_features = CPUID_EXT2_LM | CPUID_EXT2_SYSCALL | CPUID_EXT2_NX,
-        .ext3_features = CPUID_EXT3_LAHF_LM,
+        .features[FEAT_8000_0001_EDX] =
+            CPUID_EXT2_LM | CPUID_EXT2_SYSCALL | CPUID_EXT2_NX,
+        .features[FEAT_8000_0001_ECX] =
+            CPUID_EXT3_LAHF_LM,
         .xlevel = 0x80000008,
         .model_id = "Intel(R) Core(TM)2 Duo CPU     T7700  @ 2.40GHz",
     },
@@ -486,19 +495,23 @@
         .model = 6,
         .stepping = 1,
         /* Missing: CPUID_VME, CPUID_HT */
-        .features = PPRO_FEATURES |
+        .features[FEAT_1_EDX] =
+            PPRO_FEATURES |
             CPUID_MTRR | CPUID_CLFLUSH | CPUID_MCA |
             CPUID_PSE36,
         /* Missing: CPUID_EXT_POPCNT, CPUID_EXT_MONITOR */
-        .ext_features = CPUID_EXT_SSE3 | CPUID_EXT_CX16,
+        .features[FEAT_1_ECX] =
+            CPUID_EXT_SSE3 | CPUID_EXT_CX16,
         /* Missing: CPUID_EXT2_PDPE1GB, CPUID_EXT2_RDTSCP */
-        .ext2_features = (PPRO_FEATURES & CPUID_EXT2_AMD_ALIASES) |
+        .features[FEAT_8000_0001_EDX] =
+            (PPRO_FEATURES & CPUID_EXT2_AMD_ALIASES) |
             CPUID_EXT2_LM | CPUID_EXT2_SYSCALL | CPUID_EXT2_NX,
         /* Missing: CPUID_EXT3_LAHF_LM, CPUID_EXT3_CMP_LEG, CPUID_EXT3_EXTAPIC,
                     CPUID_EXT3_CR8LEG, CPUID_EXT3_ABM, CPUID_EXT3_SSE4A,
                     CPUID_EXT3_MISALIGNSSE, CPUID_EXT3_3DNOWPREFETCH,
                     CPUID_EXT3_OSVW, CPUID_EXT3_IBS, CPUID_EXT3_SVM */
-        .ext3_features = 0,
+        .features[FEAT_8000_0001_ECX] =
+            0,
         .xlevel = 0x80000008,
         .model_id = "Common KVM processor"
     },
@@ -509,8 +522,10 @@
         .family = 6,
         .model = 3,
         .stepping = 3,
-        .features = PPRO_FEATURES,
-        .ext_features = CPUID_EXT_SSE3 | CPUID_EXT_POPCNT,
+        .features[FEAT_1_EDX] =
+            PPRO_FEATURES,
+        .features[FEAT_1_ECX] =
+            CPUID_EXT_SSE3 | CPUID_EXT_POPCNT,
         .xlevel = 0x80000004,
     },
     {
@@ -520,11 +535,15 @@
         .family = 15,
         .model = 6,
         .stepping = 1,
-        .features = PPRO_FEATURES |
+        .features[FEAT_1_EDX] =
+            PPRO_FEATURES |
             CPUID_MTRR | CPUID_CLFLUSH | CPUID_MCA | CPUID_PSE36,
-        .ext_features = CPUID_EXT_SSE3,
-        .ext2_features = PPRO_FEATURES & CPUID_EXT2_AMD_ALIASES,
-        .ext3_features = 0,
+        .features[FEAT_1_ECX] =
+            CPUID_EXT_SSE3,
+        .features[FEAT_8000_0001_EDX] =
+            PPRO_FEATURES & CPUID_EXT2_AMD_ALIASES,
+        .features[FEAT_8000_0001_ECX] =
+            0,
         .xlevel = 0x80000008,
         .model_id = "Common 32-bit KVM processor"
     },
@@ -535,12 +554,15 @@
         .family = 6,
         .model = 14,
         .stepping = 8,
-        .features = PPRO_FEATURES | CPUID_VME |
+        .features[FEAT_1_EDX] =
+            PPRO_FEATURES | CPUID_VME |
             CPUID_MTRR | CPUID_CLFLUSH | CPUID_MCA | CPUID_DTS | CPUID_ACPI |
             CPUID_SS | CPUID_HT | CPUID_TM | CPUID_PBE,
-        .ext_features = CPUID_EXT_SSE3 | CPUID_EXT_MONITOR | CPUID_EXT_VMX |
+        .features[FEAT_1_ECX] =
+            CPUID_EXT_SSE3 | CPUID_EXT_MONITOR | CPUID_EXT_VMX |
             CPUID_EXT_EST | CPUID_EXT_TM2 | CPUID_EXT_XTPR | CPUID_EXT_PDCM,
-        .ext2_features = CPUID_EXT2_NX,
+        .features[FEAT_8000_0001_EDX] =
+            CPUID_EXT2_NX,
         .xlevel = 0x80000008,
         .model_id = "Genuine Intel(R) CPU           T2600  @ 2.16GHz",
     },
@@ -551,7 +573,8 @@
         .family = 4,
         .model = 0,
         .stepping = 0,
-        .features = I486_FEATURES,
+        .features[FEAT_1_EDX] =
+            I486_FEATURES,
         .xlevel = 0,
     },
     {
@@ -561,7 +584,8 @@
         .family = 5,
         .model = 4,
         .stepping = 3,
-        .features = PENTIUM_FEATURES,
+        .features[FEAT_1_EDX] =
+            PENTIUM_FEATURES,
         .xlevel = 0,
     },
     {
@@ -571,7 +595,8 @@
         .family = 6,
         .model = 5,
         .stepping = 2,
-        .features = PENTIUM2_FEATURES,
+        .features[FEAT_1_EDX] =
+            PENTIUM2_FEATURES,
         .xlevel = 0,
     },
     {
@@ -581,7 +606,8 @@
         .family = 6,
         .model = 7,
         .stepping = 3,
-        .features = PENTIUM3_FEATURES,
+        .features[FEAT_1_EDX] =
+            PENTIUM3_FEATURES,
         .xlevel = 0,
     },
     {
@@ -591,9 +617,11 @@
         .family = 6,
         .model = 2,
         .stepping = 3,
-        .features = PPRO_FEATURES | CPUID_PSE36 | CPUID_VME | CPUID_MTRR |
+        .features[FEAT_1_EDX] =
+            PPRO_FEATURES | CPUID_PSE36 | CPUID_VME | CPUID_MTRR |
             CPUID_MCA,
-        .ext2_features = (PPRO_FEATURES & CPUID_EXT2_AMD_ALIASES) |
+        .features[FEAT_8000_0001_EDX] =
+            (PPRO_FEATURES & CPUID_EXT2_AMD_ALIASES) |
             CPUID_EXT2_MMXEXT | CPUID_EXT2_3DNOW | CPUID_EXT2_3DNOWEXT,
         .xlevel = 0x80000008,
     },
@@ -605,15 +633,19 @@
         .family = 6,
         .model = 28,
         .stepping = 2,
-        .features = PPRO_FEATURES |
+        .features[FEAT_1_EDX] =
+            PPRO_FEATURES |
             CPUID_MTRR | CPUID_CLFLUSH | CPUID_MCA | CPUID_VME | CPUID_DTS |
             CPUID_ACPI | CPUID_SS | CPUID_HT | CPUID_TM | CPUID_PBE,
             /* Some CPUs got no CPUID_SEP */
-        .ext_features = CPUID_EXT_SSE3 | CPUID_EXT_MONITOR | CPUID_EXT_SSSE3 |
+        .features[FEAT_1_ECX] =
+            CPUID_EXT_SSE3 | CPUID_EXT_MONITOR | CPUID_EXT_SSSE3 |
             CPUID_EXT_DSCPL | CPUID_EXT_EST | CPUID_EXT_TM2 | CPUID_EXT_XTPR,
-        .ext2_features = (PPRO_FEATURES & CPUID_EXT2_AMD_ALIASES) |
+        .features[FEAT_8000_0001_EDX] =
+            (PPRO_FEATURES & CPUID_EXT2_AMD_ALIASES) |
             CPUID_EXT2_NX,
-        .ext3_features = CPUID_EXT3_LAHF_LM,
+        .features[FEAT_8000_0001_ECX] =
+            CPUID_EXT3_LAHF_LM,
         .xlevel = 0x8000000A,
         .model_id = "Intel(R) Atom(TM) CPU N270   @ 1.60GHz",
     },
@@ -624,14 +656,18 @@
         .family = 6,
         .model = 2,
         .stepping = 3,
-        .features = CPUID_SSE2 | CPUID_SSE | CPUID_FXSR | CPUID_MMX |
+        .features[FEAT_1_EDX] =
+            CPUID_SSE2 | CPUID_SSE | CPUID_FXSR | CPUID_MMX |
              CPUID_CLFLUSH | CPUID_PSE36 | CPUID_PAT | CPUID_CMOV | CPUID_MCA |
              CPUID_PGE | CPUID_MTRR | CPUID_SEP | CPUID_APIC | CPUID_CX8 |
              CPUID_MCE | CPUID_PAE | CPUID_MSR | CPUID_TSC | CPUID_PSE |
              CPUID_DE | CPUID_FP87,
-        .ext_features = CPUID_EXT_SSSE3 | CPUID_EXT_SSE3,
-        .ext2_features = CPUID_EXT2_LM | CPUID_EXT2_NX | CPUID_EXT2_SYSCALL,
-        .ext3_features = CPUID_EXT3_LAHF_LM,
+        .features[FEAT_1_ECX] =
+            CPUID_EXT_SSSE3 | CPUID_EXT_SSE3,
+        .features[FEAT_8000_0001_EDX] =
+            CPUID_EXT2_LM | CPUID_EXT2_NX | CPUID_EXT2_SYSCALL,
+        .features[FEAT_8000_0001_ECX] =
+            CPUID_EXT3_LAHF_LM,
         .xlevel = 0x8000000A,
         .model_id = "Intel Celeron_4x0 (Conroe/Merom Class Core 2)",
     },
@@ -642,15 +678,19 @@
         .family = 6,
         .model = 2,
         .stepping = 3,
-        .features = CPUID_SSE2 | CPUID_SSE | CPUID_FXSR | CPUID_MMX |
+        .features[FEAT_1_EDX] =
+            CPUID_SSE2 | CPUID_SSE | CPUID_FXSR | CPUID_MMX |
              CPUID_CLFLUSH | CPUID_PSE36 | CPUID_PAT | CPUID_CMOV | CPUID_MCA |
              CPUID_PGE | CPUID_MTRR | CPUID_SEP | CPUID_APIC | CPUID_CX8 |
              CPUID_MCE | CPUID_PAE | CPUID_MSR | CPUID_TSC | CPUID_PSE |
              CPUID_DE | CPUID_FP87,
-        .ext_features = CPUID_EXT_SSE41 | CPUID_EXT_CX16 | CPUID_EXT_SSSE3 |
+        .features[FEAT_1_ECX] =
+            CPUID_EXT_SSE41 | CPUID_EXT_CX16 | CPUID_EXT_SSSE3 |
              CPUID_EXT_SSE3,
-        .ext2_features = CPUID_EXT2_LM | CPUID_EXT2_NX | CPUID_EXT2_SYSCALL,
-        .ext3_features = CPUID_EXT3_LAHF_LM,
+        .features[FEAT_8000_0001_EDX] =
+            CPUID_EXT2_LM | CPUID_EXT2_NX | CPUID_EXT2_SYSCALL,
+        .features[FEAT_8000_0001_ECX] =
+            CPUID_EXT3_LAHF_LM,
         .xlevel = 0x8000000A,
         .model_id = "Intel Core 2 Duo P9xxx (Penryn Class Core 2)",
     },
@@ -661,15 +701,19 @@
         .family = 6,
         .model = 2,
         .stepping = 3,
-        .features = CPUID_SSE2 | CPUID_SSE | CPUID_FXSR | CPUID_MMX |
+        .features[FEAT_1_EDX] =
+            CPUID_SSE2 | CPUID_SSE | CPUID_FXSR | CPUID_MMX |
              CPUID_CLFLUSH | CPUID_PSE36 | CPUID_PAT | CPUID_CMOV | CPUID_MCA |
              CPUID_PGE | CPUID_MTRR | CPUID_SEP | CPUID_APIC | CPUID_CX8 |
              CPUID_MCE | CPUID_PAE | CPUID_MSR | CPUID_TSC | CPUID_PSE |
              CPUID_DE | CPUID_FP87,
-        .ext_features = CPUID_EXT_POPCNT | CPUID_EXT_SSE42 | CPUID_EXT_SSE41 |
+        .features[FEAT_1_ECX] =
+            CPUID_EXT_POPCNT | CPUID_EXT_SSE42 | CPUID_EXT_SSE41 |
              CPUID_EXT_CX16 | CPUID_EXT_SSSE3 | CPUID_EXT_SSE3,
-        .ext2_features = CPUID_EXT2_LM | CPUID_EXT2_SYSCALL | CPUID_EXT2_NX,
-        .ext3_features = CPUID_EXT3_LAHF_LM,
+        .features[FEAT_8000_0001_EDX] =
+            CPUID_EXT2_LM | CPUID_EXT2_SYSCALL | CPUID_EXT2_NX,
+        .features[FEAT_8000_0001_ECX] =
+            CPUID_EXT3_LAHF_LM,
         .xlevel = 0x8000000A,
         .model_id = "Intel Core i7 9xx (Nehalem Class Core i7)",
     },
@@ -680,16 +724,20 @@
         .family = 6,
         .model = 44,
         .stepping = 1,
-        .features = CPUID_SSE2 | CPUID_SSE | CPUID_FXSR | CPUID_MMX |
+        .features[FEAT_1_EDX] =
+            CPUID_SSE2 | CPUID_SSE | CPUID_FXSR | CPUID_MMX |
              CPUID_CLFLUSH | CPUID_PSE36 | CPUID_PAT | CPUID_CMOV | CPUID_MCA |
              CPUID_PGE | CPUID_MTRR | CPUID_SEP | CPUID_APIC | CPUID_CX8 |
              CPUID_MCE | CPUID_PAE | CPUID_MSR | CPUID_TSC | CPUID_PSE |
              CPUID_DE | CPUID_FP87,
-        .ext_features = CPUID_EXT_AES | CPUID_EXT_POPCNT | CPUID_EXT_SSE42 |
+        .features[FEAT_1_ECX] =
+            CPUID_EXT_AES | CPUID_EXT_POPCNT | CPUID_EXT_SSE42 |
              CPUID_EXT_SSE41 | CPUID_EXT_CX16 | CPUID_EXT_SSSE3 |
              CPUID_EXT_PCLMULQDQ | CPUID_EXT_SSE3,
-        .ext2_features = CPUID_EXT2_LM | CPUID_EXT2_SYSCALL | CPUID_EXT2_NX,
-        .ext3_features = CPUID_EXT3_LAHF_LM,
+        .features[FEAT_8000_0001_EDX] =
+            CPUID_EXT2_LM | CPUID_EXT2_SYSCALL | CPUID_EXT2_NX,
+        .features[FEAT_8000_0001_ECX] =
+            CPUID_EXT3_LAHF_LM,
         .xlevel = 0x8000000A,
         .model_id = "Westmere E56xx/L56xx/X56xx (Nehalem-C)",
     },
@@ -700,19 +748,23 @@
         .family = 6,
         .model = 42,
         .stepping = 1,
-        .features = CPUID_SSE2 | CPUID_SSE | CPUID_FXSR | CPUID_MMX |
+        .features[FEAT_1_EDX] =
+            CPUID_SSE2 | CPUID_SSE | CPUID_FXSR | CPUID_MMX |
              CPUID_CLFLUSH | CPUID_PSE36 | CPUID_PAT | CPUID_CMOV | CPUID_MCA |
              CPUID_PGE | CPUID_MTRR | CPUID_SEP | CPUID_APIC | CPUID_CX8 |
              CPUID_MCE | CPUID_PAE | CPUID_MSR | CPUID_TSC | CPUID_PSE |
              CPUID_DE | CPUID_FP87,
-        .ext_features = CPUID_EXT_AVX | CPUID_EXT_XSAVE | CPUID_EXT_AES |
+        .features[FEAT_1_ECX] =
+            CPUID_EXT_AVX | CPUID_EXT_XSAVE | CPUID_EXT_AES |
              CPUID_EXT_TSC_DEADLINE_TIMER | CPUID_EXT_POPCNT |
              CPUID_EXT_X2APIC | CPUID_EXT_SSE42 | CPUID_EXT_SSE41 |
              CPUID_EXT_CX16 | CPUID_EXT_SSSE3 | CPUID_EXT_PCLMULQDQ |
              CPUID_EXT_SSE3,
-        .ext2_features = CPUID_EXT2_LM | CPUID_EXT2_RDTSCP | CPUID_EXT2_NX |
+        .features[FEAT_8000_0001_EDX] =
+            CPUID_EXT2_LM | CPUID_EXT2_RDTSCP | CPUID_EXT2_NX |
              CPUID_EXT2_SYSCALL,
-        .ext3_features = CPUID_EXT3_LAHF_LM,
+        .features[FEAT_8000_0001_ECX] =
+            CPUID_EXT3_LAHF_LM,
         .xlevel = 0x8000000A,
         .model_id = "Intel Xeon E312xx (Sandy Bridge)",
     },
@@ -723,21 +775,26 @@
         .family = 6,
         .model = 60,
         .stepping = 1,
-        .features = CPUID_SSE2 | CPUID_SSE | CPUID_FXSR | CPUID_MMX |
+        .features[FEAT_1_EDX] =
+            CPUID_SSE2 | CPUID_SSE | CPUID_FXSR | CPUID_MMX |
              CPUID_CLFLUSH | CPUID_PSE36 | CPUID_PAT | CPUID_CMOV | CPUID_MCA |
              CPUID_PGE | CPUID_MTRR | CPUID_SEP | CPUID_APIC | CPUID_CX8 |
              CPUID_MCE | CPUID_PAE | CPUID_MSR | CPUID_TSC | CPUID_PSE |
              CPUID_DE | CPUID_FP87,
-        .ext_features = CPUID_EXT_AVX | CPUID_EXT_XSAVE | CPUID_EXT_AES |
+        .features[FEAT_1_ECX] =
+            CPUID_EXT_AVX | CPUID_EXT_XSAVE | CPUID_EXT_AES |
              CPUID_EXT_POPCNT | CPUID_EXT_X2APIC | CPUID_EXT_SSE42 |
              CPUID_EXT_SSE41 | CPUID_EXT_CX16 | CPUID_EXT_SSSE3 |
              CPUID_EXT_PCLMULQDQ | CPUID_EXT_SSE3 |
              CPUID_EXT_TSC_DEADLINE_TIMER | CPUID_EXT_FMA | CPUID_EXT_MOVBE |
              CPUID_EXT_PCID,
-        .ext2_features = CPUID_EXT2_LM | CPUID_EXT2_RDTSCP | CPUID_EXT2_NX |
+        .features[FEAT_8000_0001_EDX] =
+            CPUID_EXT2_LM | CPUID_EXT2_RDTSCP | CPUID_EXT2_NX |
              CPUID_EXT2_SYSCALL,
-        .ext3_features = CPUID_EXT3_LAHF_LM,
-        .cpuid_7_0_ebx_features = CPUID_7_0_EBX_FSGSBASE | CPUID_7_0_EBX_BMI1 |
+        .features[FEAT_8000_0001_ECX] =
+            CPUID_EXT3_LAHF_LM,
+        .features[FEAT_7_0_EBX] =
+            CPUID_7_0_EBX_FSGSBASE | CPUID_7_0_EBX_BMI1 |
             CPUID_7_0_EBX_HLE | CPUID_7_0_EBX_AVX2 | CPUID_7_0_EBX_SMEP |
             CPUID_7_0_EBX_BMI2 | CPUID_7_0_EBX_ERMS | CPUID_7_0_EBX_INVPCID |
             CPUID_7_0_EBX_RTM,
@@ -751,13 +808,16 @@
         .family = 15,
         .model = 6,
         .stepping = 1,
-        .features = CPUID_SSE2 | CPUID_SSE | CPUID_FXSR | CPUID_MMX |
+        .features[FEAT_1_EDX] =
+            CPUID_SSE2 | CPUID_SSE | CPUID_FXSR | CPUID_MMX |
              CPUID_CLFLUSH | CPUID_PSE36 | CPUID_PAT | CPUID_CMOV | CPUID_MCA |
              CPUID_PGE | CPUID_MTRR | CPUID_SEP | CPUID_APIC | CPUID_CX8 |
              CPUID_MCE | CPUID_PAE | CPUID_MSR | CPUID_TSC | CPUID_PSE |
              CPUID_DE | CPUID_FP87,
-        .ext_features = CPUID_EXT_SSE3,
-        .ext2_features = CPUID_EXT2_LM | CPUID_EXT2_FXSR | CPUID_EXT2_MMX |
+        .features[FEAT_1_ECX] =
+            CPUID_EXT_SSE3,
+        .features[FEAT_8000_0001_EDX] =
+            CPUID_EXT2_LM | CPUID_EXT2_FXSR | CPUID_EXT2_MMX |
              CPUID_EXT2_NX | CPUID_EXT2_PSE36 | CPUID_EXT2_PAT |
              CPUID_EXT2_CMOV | CPUID_EXT2_MCA | CPUID_EXT2_PGE |
              CPUID_EXT2_MTRR | CPUID_EXT2_SYSCALL | CPUID_EXT2_APIC |
@@ -773,20 +833,24 @@
         .family = 15,
         .model = 6,
         .stepping = 1,
-        .features = CPUID_SSE2 | CPUID_SSE | CPUID_FXSR | CPUID_MMX |
+        .features[FEAT_1_EDX] =
+            CPUID_SSE2 | CPUID_SSE | CPUID_FXSR | CPUID_MMX |
              CPUID_CLFLUSH | CPUID_PSE36 | CPUID_PAT | CPUID_CMOV | CPUID_MCA |
              CPUID_PGE | CPUID_MTRR | CPUID_SEP | CPUID_APIC | CPUID_CX8 |
              CPUID_MCE | CPUID_PAE | CPUID_MSR | CPUID_TSC | CPUID_PSE |
              CPUID_DE | CPUID_FP87,
-        .ext_features = CPUID_EXT_CX16 | CPUID_EXT_SSE3,
-        .ext2_features = CPUID_EXT2_LM | CPUID_EXT2_RDTSCP | CPUID_EXT2_FXSR |
+        .features[FEAT_1_ECX] =
+            CPUID_EXT_CX16 | CPUID_EXT_SSE3,
+        .features[FEAT_8000_0001_EDX] =
+            CPUID_EXT2_LM | CPUID_EXT2_RDTSCP | CPUID_EXT2_FXSR |
              CPUID_EXT2_MMX | CPUID_EXT2_NX | CPUID_EXT2_PSE36 |
              CPUID_EXT2_PAT | CPUID_EXT2_CMOV | CPUID_EXT2_MCA |
              CPUID_EXT2_PGE | CPUID_EXT2_MTRR | CPUID_EXT2_SYSCALL |
              CPUID_EXT2_APIC | CPUID_EXT2_CX8 | CPUID_EXT2_MCE |
              CPUID_EXT2_PAE | CPUID_EXT2_MSR | CPUID_EXT2_TSC | CPUID_EXT2_PSE |
              CPUID_EXT2_DE | CPUID_EXT2_FPU,
-        .ext3_features = CPUID_EXT3_SVM | CPUID_EXT3_LAHF_LM,
+        .features[FEAT_8000_0001_ECX] =
+            CPUID_EXT3_SVM | CPUID_EXT3_LAHF_LM,
         .xlevel = 0x80000008,
         .model_id = "AMD Opteron 22xx (Gen 2 Class Opteron)",
     },
@@ -797,21 +861,25 @@
         .family = 15,
         .model = 6,
         .stepping = 1,
-        .features = CPUID_SSE2 | CPUID_SSE | CPUID_FXSR | CPUID_MMX |
+        .features[FEAT_1_EDX] =
+            CPUID_SSE2 | CPUID_SSE | CPUID_FXSR | CPUID_MMX |
              CPUID_CLFLUSH | CPUID_PSE36 | CPUID_PAT | CPUID_CMOV | CPUID_MCA |
              CPUID_PGE | CPUID_MTRR | CPUID_SEP | CPUID_APIC | CPUID_CX8 |
              CPUID_MCE | CPUID_PAE | CPUID_MSR | CPUID_TSC | CPUID_PSE |
              CPUID_DE | CPUID_FP87,
-        .ext_features = CPUID_EXT_POPCNT | CPUID_EXT_CX16 | CPUID_EXT_MONITOR |
+        .features[FEAT_1_ECX] =
+            CPUID_EXT_POPCNT | CPUID_EXT_CX16 | CPUID_EXT_MONITOR |
              CPUID_EXT_SSE3,
-        .ext2_features = CPUID_EXT2_LM | CPUID_EXT2_RDTSCP | CPUID_EXT2_FXSR |
+        .features[FEAT_8000_0001_EDX] =
+            CPUID_EXT2_LM | CPUID_EXT2_RDTSCP | CPUID_EXT2_FXSR |
              CPUID_EXT2_MMX | CPUID_EXT2_NX | CPUID_EXT2_PSE36 |
              CPUID_EXT2_PAT | CPUID_EXT2_CMOV | CPUID_EXT2_MCA |
              CPUID_EXT2_PGE | CPUID_EXT2_MTRR | CPUID_EXT2_SYSCALL |
              CPUID_EXT2_APIC | CPUID_EXT2_CX8 | CPUID_EXT2_MCE |
              CPUID_EXT2_PAE | CPUID_EXT2_MSR | CPUID_EXT2_TSC | CPUID_EXT2_PSE |
              CPUID_EXT2_DE | CPUID_EXT2_FPU,
-        .ext3_features = CPUID_EXT3_MISALIGNSSE | CPUID_EXT3_SSE4A |
+        .features[FEAT_8000_0001_ECX] =
+            CPUID_EXT3_MISALIGNSSE | CPUID_EXT3_SSE4A |
              CPUID_EXT3_ABM | CPUID_EXT3_SVM | CPUID_EXT3_LAHF_LM,
         .xlevel = 0x80000008,
         .model_id = "AMD Opteron 23xx (Gen 3 Class Opteron)",
@@ -823,23 +891,27 @@
         .family = 21,
         .model = 1,
         .stepping = 2,
-        .features = CPUID_SSE2 | CPUID_SSE | CPUID_FXSR | CPUID_MMX |
+        .features[FEAT_1_EDX] =
+            CPUID_SSE2 | CPUID_SSE | CPUID_FXSR | CPUID_MMX |
              CPUID_CLFLUSH | CPUID_PSE36 | CPUID_PAT | CPUID_CMOV | CPUID_MCA |
              CPUID_PGE | CPUID_MTRR | CPUID_SEP | CPUID_APIC | CPUID_CX8 |
              CPUID_MCE | CPUID_PAE | CPUID_MSR | CPUID_TSC | CPUID_PSE |
              CPUID_DE | CPUID_FP87,
-        .ext_features = CPUID_EXT_AVX | CPUID_EXT_XSAVE | CPUID_EXT_AES |
+        .features[FEAT_1_ECX] =
+            CPUID_EXT_AVX | CPUID_EXT_XSAVE | CPUID_EXT_AES |
              CPUID_EXT_POPCNT | CPUID_EXT_SSE42 | CPUID_EXT_SSE41 |
              CPUID_EXT_CX16 | CPUID_EXT_SSSE3 | CPUID_EXT_PCLMULQDQ |
              CPUID_EXT_SSE3,
-        .ext2_features = CPUID_EXT2_LM | CPUID_EXT2_RDTSCP |
+        .features[FEAT_8000_0001_EDX] =
+            CPUID_EXT2_LM | CPUID_EXT2_RDTSCP |
              CPUID_EXT2_PDPE1GB | CPUID_EXT2_FXSR | CPUID_EXT2_MMX |
              CPUID_EXT2_NX | CPUID_EXT2_PSE36 | CPUID_EXT2_PAT |
              CPUID_EXT2_CMOV | CPUID_EXT2_MCA | CPUID_EXT2_PGE |
              CPUID_EXT2_MTRR | CPUID_EXT2_SYSCALL | CPUID_EXT2_APIC |
              CPUID_EXT2_CX8 | CPUID_EXT2_MCE | CPUID_EXT2_PAE | CPUID_EXT2_MSR |
              CPUID_EXT2_TSC | CPUID_EXT2_PSE | CPUID_EXT2_DE | CPUID_EXT2_FPU,
-        .ext3_features = CPUID_EXT3_FMA4 | CPUID_EXT3_XOP |
+        .features[FEAT_8000_0001_ECX] =
+            CPUID_EXT3_FMA4 | CPUID_EXT3_XOP |
              CPUID_EXT3_3DNOWPREFETCH | CPUID_EXT3_MISALIGNSSE |
              CPUID_EXT3_SSE4A | CPUID_EXT3_ABM | CPUID_EXT3_SVM |
              CPUID_EXT3_LAHF_LM,
@@ -853,23 +925,27 @@
         .family = 21,
         .model = 2,
         .stepping = 0,
-        .features = CPUID_SSE2 | CPUID_SSE | CPUID_FXSR | CPUID_MMX |
+        .features[FEAT_1_EDX] =
+            CPUID_SSE2 | CPUID_SSE | CPUID_FXSR | CPUID_MMX |
              CPUID_CLFLUSH | CPUID_PSE36 | CPUID_PAT | CPUID_CMOV | CPUID_MCA |
              CPUID_PGE | CPUID_MTRR | CPUID_SEP | CPUID_APIC | CPUID_CX8 |
              CPUID_MCE | CPUID_PAE | CPUID_MSR | CPUID_TSC | CPUID_PSE |
              CPUID_DE | CPUID_FP87,
-        .ext_features = CPUID_EXT_F16C | CPUID_EXT_AVX | CPUID_EXT_XSAVE |
+        .features[FEAT_1_ECX] =
+            CPUID_EXT_F16C | CPUID_EXT_AVX | CPUID_EXT_XSAVE |
              CPUID_EXT_AES | CPUID_EXT_POPCNT | CPUID_EXT_SSE42 |
              CPUID_EXT_SSE41 | CPUID_EXT_CX16 | CPUID_EXT_FMA |
              CPUID_EXT_SSSE3 | CPUID_EXT_PCLMULQDQ | CPUID_EXT_SSE3,
-        .ext2_features = CPUID_EXT2_LM | CPUID_EXT2_RDTSCP |
+        .features[FEAT_8000_0001_EDX] =
+            CPUID_EXT2_LM | CPUID_EXT2_RDTSCP |
              CPUID_EXT2_PDPE1GB | CPUID_EXT2_FXSR | CPUID_EXT2_MMX |
              CPUID_EXT2_NX | CPUID_EXT2_PSE36 | CPUID_EXT2_PAT |
              CPUID_EXT2_CMOV | CPUID_EXT2_MCA | CPUID_EXT2_PGE |
              CPUID_EXT2_MTRR | CPUID_EXT2_SYSCALL | CPUID_EXT2_APIC |
              CPUID_EXT2_CX8 | CPUID_EXT2_MCE | CPUID_EXT2_PAE | CPUID_EXT2_MSR |
              CPUID_EXT2_TSC | CPUID_EXT2_PSE | CPUID_EXT2_DE | CPUID_EXT2_FPU,
-        .ext3_features = CPUID_EXT3_TBM | CPUID_EXT3_FMA4 | CPUID_EXT3_XOP |
+        .features[FEAT_8000_0001_ECX] =
+            CPUID_EXT3_TBM | CPUID_EXT3_FMA4 | CPUID_EXT3_XOP |
              CPUID_EXT3_3DNOWPREFETCH | CPUID_EXT3_MISALIGNSSE |
              CPUID_EXT3_SSE4A | CPUID_EXT3_ABM | CPUID_EXT3_SVM |
              CPUID_EXT3_LAHF_LM,
@@ -918,20 +994,22 @@
     x86_cpu_def->stepping = eax & 0x0F;
 
     x86_cpu_def->level = kvm_arch_get_supported_cpuid(s, 0x0, 0, R_EAX);
-    x86_cpu_def->features = kvm_arch_get_supported_cpuid(s, 0x1, 0, R_EDX);
-    x86_cpu_def->ext_features = kvm_arch_get_supported_cpuid(s, 0x1, 0, R_ECX);
+    x86_cpu_def->features[FEAT_1_EDX] =
+        kvm_arch_get_supported_cpuid(s, 0x1, 0, R_EDX);
+    x86_cpu_def->features[FEAT_1_ECX] =
+        kvm_arch_get_supported_cpuid(s, 0x1, 0, R_ECX);
 
     if (x86_cpu_def->level >= 7) {
-        x86_cpu_def->cpuid_7_0_ebx_features =
+        x86_cpu_def->features[FEAT_7_0_EBX] =
                     kvm_arch_get_supported_cpuid(s, 0x7, 0, R_EBX);
     } else {
-        x86_cpu_def->cpuid_7_0_ebx_features = 0;
+        x86_cpu_def->features[FEAT_7_0_EBX] = 0;
     }
 
     x86_cpu_def->xlevel = kvm_arch_get_supported_cpuid(s, 0x80000000, 0, R_EAX);
-    x86_cpu_def->ext2_features =
+    x86_cpu_def->features[FEAT_8000_0001_EDX] =
                 kvm_arch_get_supported_cpuid(s, 0x80000001, 0, R_EDX);
-    x86_cpu_def->ext3_features =
+    x86_cpu_def->features[FEAT_8000_0001_ECX] =
                 kvm_arch_get_supported_cpuid(s, 0x80000001, 0, R_ECX);
 
     cpu_x86_fill_model_id(x86_cpu_def->model_id);
@@ -944,15 +1022,15 @@
             /* Support VIA max extended level */
             x86_cpu_def->xlevel2 = eax;
             host_cpuid(0xC0000001, 0, &eax, &ebx, &ecx, &edx);
-            x86_cpu_def->ext4_features =
+            x86_cpu_def->features[FEAT_C000_0001_EDX] =
                     kvm_arch_get_supported_cpuid(s, 0xC0000001, 0, R_EDX);
         }
     }
 
     /* Other KVM-specific feature fields: */
-    x86_cpu_def->svm_features =
+    x86_cpu_def->features[FEAT_SVM] =
         kvm_arch_get_supported_cpuid(s, 0x8000000A, 0, R_EDX);
-    x86_cpu_def->kvm_features =
+    x86_cpu_def->features[FEAT_KVM] =
         kvm_arch_get_supported_cpuid(s, KVM_CPUID_FEATURES, 0, R_EAX);
 
 #endif /* CONFIG_KVM */
@@ -989,21 +1067,29 @@
     uint32_t mask;
     int rv, i;
     struct model_features_t ft[] = {
-        {&env->cpuid_features, &host_def.features,
+        {&env->features[FEAT_1_EDX],
+            &host_def.features[FEAT_1_EDX],
             FEAT_1_EDX },
-        {&env->cpuid_ext_features, &host_def.ext_features,
+        {&env->features[FEAT_1_ECX],
+            &host_def.features[FEAT_1_ECX],
             FEAT_1_ECX },
-        {&env->cpuid_ext2_features, &host_def.ext2_features,
+        {&env->features[FEAT_8000_0001_EDX],
+            &host_def.features[FEAT_8000_0001_EDX],
             FEAT_8000_0001_EDX },
-        {&env->cpuid_ext3_features, &host_def.ext3_features,
+        {&env->features[FEAT_8000_0001_ECX],
+            &host_def.features[FEAT_8000_0001_ECX],
             FEAT_8000_0001_ECX },
-        {&env->cpuid_ext4_features, &host_def.ext4_features,
+        {&env->features[FEAT_C000_0001_EDX],
+            &host_def.features[FEAT_C000_0001_EDX],
             FEAT_C000_0001_EDX },
-        {&env->cpuid_7_0_ebx_features, &host_def.cpuid_7_0_ebx_features,
+        {&env->features[FEAT_7_0_EBX],
+            &host_def.features[FEAT_7_0_EBX],
             FEAT_7_0_EBX },
-        {&env->cpuid_svm_features, &host_def.svm_features,
+        {&env->features[FEAT_SVM],
+            &host_def.features[FEAT_SVM],
             FEAT_SVM },
-        {&env->cpuid_kvm_features, &host_def.kvm_features,
+        {&env->features[FEAT_KVM],
+            &host_def.features[FEAT_KVM],
             FEAT_KVM },
     };
 
@@ -1271,6 +1357,50 @@
     cpu->env.tsc_khz = value / 1000;
 }
 
+static void x86_cpuid_get_apic_id(Object *obj, Visitor *v, void *opaque,
+                                  const char *name, Error **errp)
+{
+    X86CPU *cpu = X86_CPU(obj);
+    int64_t value = cpu->env.cpuid_apic_id;
+
+    visit_type_int(v, &value, name, errp);
+}
+
+static void x86_cpuid_set_apic_id(Object *obj, Visitor *v, void *opaque,
+                                  const char *name, Error **errp)
+{
+    X86CPU *cpu = X86_CPU(obj);
+    DeviceState *dev = DEVICE(obj);
+    const int64_t min = 0;
+    const int64_t max = UINT32_MAX;
+    Error *error = NULL;
+    int64_t value;
+
+    if (dev->realized) {
+        error_setg(errp, "Attempt to set property '%s' on '%s' after "
+                   "it was realized", name, object_get_typename(obj));
+        return;
+    }
+
+    visit_type_int(v, &value, name, &error);
+    if (error) {
+        error_propagate(errp, error);
+        return;
+    }
+    if (value < min || value > max) {
+        error_setg(errp, "Property %s.%s doesn't take value %" PRId64
+                   " (minimum: %" PRId64 ", maximum: %" PRId64 ")" ,
+                   object_get_typename(obj), name, value, min, max);
+        return;
+    }
+
+    if ((value != cpu->env.cpuid_apic_id) && cpu_exists(value)) {
+        error_setg(errp, "CPU with APIC ID %" PRIi64 " exists", value);
+        return;
+    }
+    cpu->env.cpuid_apic_id = value;
+}
+
 static int cpu_x86_find_by_name(x86_def_t *x86_cpu_def, const char *name)
 {
     x86_def_t *def;
@@ -1307,6 +1437,16 @@
     return -1;
 }
 
+/* Convert all '_' in a feature string option name to '-', to make feature
+ * name conform to QOM property naming rule, which uses '-' instead of '_'.
+ */
+static inline void feat2prop(char *s)
+{
+    while ((s = strchr(s, '_'))) {
+        *s = '-';
+    }
+}
+
 /* Parse "+feature,-feature,feature=foo" CPU feature string
  */
 static void cpu_x86_parse_featurestr(X86CPU *cpu, char *features, Error **errp)
@@ -1329,6 +1469,7 @@
             add_flagname_to_bitmaps(featurestr + 1, minus_features);
         } else if ((val = strchr(featurestr, '='))) {
             *val = 0; val++;
+            feat2prop(featurestr);
             if (!strcmp(featurestr, "family")) {
                 object_property_parse(OBJECT(cpu), val, featurestr, errp);
             } else if (!strcmp(featurestr, "model")) {
@@ -1355,9 +1496,9 @@
                 object_property_parse(OBJECT(cpu), num, featurestr, errp);
             } else if (!strcmp(featurestr, "vendor")) {
                 object_property_parse(OBJECT(cpu), val, featurestr, errp);
-            } else if (!strcmp(featurestr, "model_id")) {
-                object_property_parse(OBJECT(cpu), val, "model-id", errp);
-            } else if (!strcmp(featurestr, "tsc_freq")) {
+            } else if (!strcmp(featurestr, "model-id")) {
+                object_property_parse(OBJECT(cpu), val, featurestr, errp);
+            } else if (!strcmp(featurestr, "tsc-freq")) {
                 int64_t tsc_freq;
                 char *err;
                 char num[32];
@@ -1370,7 +1511,7 @@
                 }
                 snprintf(num, sizeof(num), "%" PRId64, tsc_freq);
                 object_property_parse(OBJECT(cpu), num, "tsc-frequency", errp);
-            } else if (!strcmp(featurestr, "hv_spinlocks")) {
+            } else if (!strcmp(featurestr, "hv-spinlocks")) {
                 char *err;
                 numvalue = strtoul(val, &err, 0);
                 if (!*val || *err) {
@@ -1400,22 +1541,22 @@
         }
         featurestr = strtok(NULL, ",");
     }
-    env->cpuid_features |= plus_features[FEAT_1_EDX];
-    env->cpuid_ext_features |= plus_features[FEAT_1_ECX];
-    env->cpuid_ext2_features |= plus_features[FEAT_8000_0001_EDX];
-    env->cpuid_ext3_features |= plus_features[FEAT_8000_0001_ECX];
-    env->cpuid_ext4_features |= plus_features[FEAT_C000_0001_EDX];
-    env->cpuid_kvm_features |= plus_features[FEAT_KVM];
-    env->cpuid_svm_features |= plus_features[FEAT_SVM];
-    env->cpuid_7_0_ebx_features |= plus_features[FEAT_7_0_EBX];
-    env->cpuid_features &= ~minus_features[FEAT_1_EDX];
-    env->cpuid_ext_features &= ~minus_features[FEAT_1_ECX];
-    env->cpuid_ext2_features &= ~minus_features[FEAT_8000_0001_EDX];
-    env->cpuid_ext3_features &= ~minus_features[FEAT_8000_0001_ECX];
-    env->cpuid_ext4_features &= ~minus_features[FEAT_C000_0001_EDX];
-    env->cpuid_kvm_features &= ~minus_features[FEAT_KVM];
-    env->cpuid_svm_features &= ~minus_features[FEAT_SVM];
-    env->cpuid_7_0_ebx_features &= ~minus_features[FEAT_7_0_EBX];
+    env->features[FEAT_1_EDX] |= plus_features[FEAT_1_EDX];
+    env->features[FEAT_1_ECX] |= plus_features[FEAT_1_ECX];
+    env->features[FEAT_8000_0001_EDX] |= plus_features[FEAT_8000_0001_EDX];
+    env->features[FEAT_8000_0001_ECX] |= plus_features[FEAT_8000_0001_ECX];
+    env->features[FEAT_C000_0001_EDX] |= plus_features[FEAT_C000_0001_EDX];
+    env->features[FEAT_KVM] |= plus_features[FEAT_KVM];
+    env->features[FEAT_SVM] |= plus_features[FEAT_SVM];
+    env->features[FEAT_7_0_EBX] |= plus_features[FEAT_7_0_EBX];
+    env->features[FEAT_1_EDX] &= ~minus_features[FEAT_1_EDX];
+    env->features[FEAT_1_ECX] &= ~minus_features[FEAT_1_ECX];
+    env->features[FEAT_8000_0001_EDX] &= ~minus_features[FEAT_8000_0001_EDX];
+    env->features[FEAT_8000_0001_ECX] &= ~minus_features[FEAT_8000_0001_ECX];
+    env->features[FEAT_C000_0001_EDX] &= ~minus_features[FEAT_C000_0001_EDX];
+    env->features[FEAT_KVM] &= ~minus_features[FEAT_KVM];
+    env->features[FEAT_SVM] &= ~minus_features[FEAT_SVM];
+    env->features[FEAT_7_0_EBX] &= ~minus_features[FEAT_7_0_EBX];
 
 out:
     return;
@@ -1507,21 +1648,21 @@
     CPUX86State *env = &cpu->env;
     KVMState *s = kvm_state;
 
-    env->cpuid_features &=
+    env->features[FEAT_1_EDX] &=
         kvm_arch_get_supported_cpuid(s, 1, 0, R_EDX);
-    env->cpuid_ext_features &=
+    env->features[FEAT_1_ECX] &=
         kvm_arch_get_supported_cpuid(s, 1, 0, R_ECX);
-    env->cpuid_ext2_features &=
+    env->features[FEAT_8000_0001_EDX] &=
         kvm_arch_get_supported_cpuid(s, 0x80000001, 0, R_EDX);
-    env->cpuid_ext3_features &=
+    env->features[FEAT_8000_0001_ECX] &=
         kvm_arch_get_supported_cpuid(s, 0x80000001, 0, R_ECX);
-    env->cpuid_svm_features  &=
+    env->features[FEAT_SVM]  &=
         kvm_arch_get_supported_cpuid(s, 0x8000000A, 0, R_EDX);
-    env->cpuid_7_0_ebx_features &=
+    env->features[FEAT_7_0_EBX] &=
         kvm_arch_get_supported_cpuid(s, 7, 0, R_EBX);
-    env->cpuid_kvm_features &=
+    env->features[FEAT_KVM] &=
         kvm_arch_get_supported_cpuid(s, KVM_CPUID_FEATURES, 0, R_EAX);
-    env->cpuid_ext4_features &=
+    env->features[FEAT_C000_0001_EDX] &=
         kvm_arch_get_supported_cpuid(s, 0xC0000001, 0, R_EDX);
 
 }
@@ -1540,30 +1681,31 @@
     }
 
     if (kvm_enabled()) {
-        def->kvm_features |= kvm_default_features;
+        def->features[FEAT_KVM] |= kvm_default_features;
     }
-    def->ext_features |= CPUID_EXT_HYPERVISOR;
+    def->features[FEAT_1_ECX] |= CPUID_EXT_HYPERVISOR;
 
     object_property_set_str(OBJECT(cpu), def->vendor, "vendor", errp);
     object_property_set_int(OBJECT(cpu), def->level, "level", errp);
     object_property_set_int(OBJECT(cpu), def->family, "family", errp);
     object_property_set_int(OBJECT(cpu), def->model, "model", errp);
     object_property_set_int(OBJECT(cpu), def->stepping, "stepping", errp);
-    env->cpuid_features = def->features;
-    env->cpuid_ext_features = def->ext_features;
-    env->cpuid_ext2_features = def->ext2_features;
-    env->cpuid_ext3_features = def->ext3_features;
+    env->features[FEAT_1_EDX] = def->features[FEAT_1_EDX];
+    env->features[FEAT_1_ECX] = def->features[FEAT_1_ECX];
+    env->features[FEAT_8000_0001_EDX] = def->features[FEAT_8000_0001_EDX];
+    env->features[FEAT_8000_0001_ECX] = def->features[FEAT_8000_0001_ECX];
     object_property_set_int(OBJECT(cpu), def->xlevel, "xlevel", errp);
-    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_features = def->cpuid_7_0_ebx_features;
+    env->features[FEAT_KVM] = def->features[FEAT_KVM];
+    env->features[FEAT_SVM] = def->features[FEAT_SVM];
+    env->features[FEAT_C000_0001_EDX] = def->features[FEAT_C000_0001_EDX];
+    env->features[FEAT_7_0_EBX] = def->features[FEAT_7_0_EBX];
     env->cpuid_xlevel2 = def->xlevel2;
 
     object_property_set_str(OBJECT(cpu), def->model_id, "model-id", errp);
 }
 
-X86CPU *cpu_x86_create(const char *cpu_model, Error **errp)
+X86CPU *cpu_x86_create(const char *cpu_model, DeviceState *icc_bridge,
+                       Error **errp)
 {
     X86CPU *cpu = NULL;
     CPUX86State *env;
@@ -1580,6 +1722,14 @@
     features = model_pieces[1];
 
     cpu = X86_CPU(object_new(TYPE_X86_CPU));
+#ifndef CONFIG_USER_ONLY
+    if (icc_bridge == NULL) {
+        error_setg(&error, "Invalid icc-bridge value");
+        goto out;
+    }
+    qdev_set_parent_bus(DEVICE(cpu), qdev_get_child_bus(icc_bridge, "icc"));
+    object_unref(OBJECT(cpu));
+#endif
     env = &cpu->env;
     env->cpu_model_str = cpu_model;
 
@@ -1604,7 +1754,7 @@
     Error *error = NULL;
     X86CPU *cpu;
 
-    cpu = cpu_x86_create(cpu_model, &error);
+    cpu = cpu_x86_create(cpu_model, NULL, &error);
     if (error) {
         goto out;
     }
@@ -1627,7 +1777,7 @@
 
 void cpu_clear_apic_feature(CPUX86State *env)
 {
-    env->cpuid_features &= ~CPUID_APIC;
+    env->features[FEAT_1_EDX] &= ~CPUID_APIC;
 }
 
 #endif /* !CONFIG_USER_ONLY */
@@ -1702,8 +1852,8 @@
     case 1:
         *eax = env->cpuid_version;
         *ebx = (env->cpuid_apic_id << 24) | 8 << 8; /* CLFLUSH size in quad words, Linux wants it. */
-        *ecx = env->cpuid_ext_features;
-        *edx = env->cpuid_features;
+        *ecx = env->features[FEAT_1_ECX];
+        *edx = env->features[FEAT_1_EDX];
         if (cs->nr_cores * cs->nr_threads > 1) {
             *ebx |= (cs->nr_cores * cs->nr_threads) << 16;
             *edx |= 1 << 28;    /* HTT bit */
@@ -1771,7 +1921,7 @@
         /* Structured Extended Feature Flags Enumeration Leaf */
         if (count == 0) {
             *eax = 0; /* Maximum ECX value for sub-leaves */
-            *ebx = env->cpuid_7_0_ebx_features; /* Feature flags */
+            *ebx = env->features[FEAT_7_0_EBX]; /* Feature flags */
             *ecx = 0; /* Reserved */
             *edx = 0; /* Reserved */
         } else {
@@ -1806,7 +1956,7 @@
         break;
     case 0xD:
         /* Processor Extended State */
-        if (!(env->cpuid_ext_features & CPUID_EXT_XSAVE)) {
+        if (!(env->features[FEAT_1_ECX] & CPUID_EXT_XSAVE)) {
             *eax = 0;
             *ebx = 0;
             *ecx = 0;
@@ -1836,8 +1986,8 @@
     case 0x80000001:
         *eax = env->cpuid_version;
         *ebx = 0;
-        *ecx = env->cpuid_ext3_features;
-        *edx = env->cpuid_ext2_features;
+        *ecx = env->features[FEAT_8000_0001_ECX];
+        *edx = env->features[FEAT_8000_0001_EDX];
 
         /* The Linux kernel checks for the CMPLegacy bit and
          * discards multiple thread information if it is set.
@@ -1878,12 +2028,12 @@
     case 0x80000008:
         /* virtual & phys address size in low 2 bytes. */
 /* XXX: This value must match the one used in the MMU code. */
-        if (env->cpuid_ext2_features & CPUID_EXT2_LM) {
+        if (env->features[FEAT_8000_0001_EDX] & CPUID_EXT2_LM) {
             /* 64 bit processor */
 /* XXX: The physical address space is limited to 42 bits in exec.c. */
             *eax = 0x00003028; /* 48 bits virtual, 40 bits physical */
         } else {
-            if (env->cpuid_features & CPUID_PSE36) {
+            if (env->features[FEAT_1_EDX] & CPUID_PSE36) {
                 *eax = 0x00000024; /* 36 bits physical */
             } else {
                 *eax = 0x00000020; /* 32 bits physical */
@@ -1897,11 +2047,11 @@
         }
         break;
     case 0x8000000A:
-        if (env->cpuid_ext3_features & CPUID_EXT3_SVM) {
+        if (env->features[FEAT_8000_0001_ECX] & CPUID_EXT3_SVM) {
             *eax = 0x00000001; /* SVM Revision */
             *ebx = 0x00000010; /* nr of ASIDs */
             *ecx = 0;
-            *edx = env->cpuid_svm_features; /* optional features */
+            *edx = env->features[FEAT_SVM]; /* optional features */
         } else {
             *eax = 0;
             *ebx = 0;
@@ -1920,7 +2070,7 @@
         *eax = env->cpuid_version;
         *ebx = 0;
         *ecx = 0;
-        *edx = env->cpuid_ext4_features;
+        *edx = env->features[FEAT_C000_0001_EDX];
         break;
     case 0xC0000002:
     case 0xC0000003:
@@ -2052,7 +2202,7 @@
     unsigned int bank;
 
     if (((cenv->cpuid_version >> 8) & 0xf) >= 6
-        && (cenv->cpuid_features & (CPUID_MCE | CPUID_MCA)) ==
+        && (cenv->features[FEAT_1_EDX] & (CPUID_MCE | CPUID_MCA)) ==
             (CPUID_MCE | CPUID_MCA)) {
         cenv->mcg_cap = MCE_CAP_DEF | MCE_BANKS_DEF;
         cenv->mcg_ctl = ~(uint64_t)0;
@@ -2066,6 +2216,7 @@
 static void x86_cpu_apic_create(X86CPU *cpu, Error **errp)
 {
     CPUX86State *env = &cpu->env;
+    DeviceState *dev = DEVICE(cpu);
     APICCommonState *apic;
     const char *apic_type = "apic";
 
@@ -2075,7 +2226,7 @@
         apic_type = "xen-apic";
     }
 
-    env->apic_state = qdev_try_create(NULL, apic_type);
+    env->apic_state = qdev_try_create(qdev_get_parent_bus(dev), apic_type);
     if (env->apic_state == NULL) {
         error_setg(errp, "APIC device '%s' could not be created", apic_type);
         return;
@@ -2092,7 +2243,6 @@
 static void x86_cpu_apic_realize(X86CPU *cpu, Error **errp)
 {
     CPUX86State *env = &cpu->env;
-    static int apic_mapped;
 
     if (env->apic_state == NULL) {
         return;
@@ -2103,16 +2253,6 @@
                    object_get_typename(OBJECT(env->apic_state)));
         return;
     }
-
-    /* XXX: mapping more APICs at the same memory location */
-    if (apic_mapped == 0) {
-        /* NOTE: the APIC is directly connected to the CPU - it is not
-           on the global memory bus. */
-        /* XXX: what if the base changes? */
-        sysbus_mmio_map_overlap(SYS_BUS_DEVICE(env->apic_state), 0,
-                                APIC_DEFAULT_ADDRESS, 0x1000);
-        apic_mapped = 1;
-    }
 }
 #else
 static void x86_cpu_apic_realize(X86CPU *cpu, Error **errp)
@@ -2127,7 +2267,7 @@
     CPUX86State *env = &cpu->env;
     Error *local_err = NULL;
 
-    if (env->cpuid_7_0_ebx_features && env->cpuid_level < 7) {
+    if (env->features[FEAT_7_0_EBX] && env->cpuid_level < 7) {
         env->cpuid_level = 7;
     }
 
@@ -2137,21 +2277,21 @@
     if (env->cpuid_vendor1 == CPUID_VENDOR_AMD_1 &&
         env->cpuid_vendor2 == CPUID_VENDOR_AMD_2 &&
         env->cpuid_vendor3 == CPUID_VENDOR_AMD_3) {
-        env->cpuid_ext2_features &= ~CPUID_EXT2_AMD_ALIASES;
-        env->cpuid_ext2_features |= (env->cpuid_features
+        env->features[FEAT_8000_0001_EDX] &= ~CPUID_EXT2_AMD_ALIASES;
+        env->features[FEAT_8000_0001_EDX] |= (env->features[FEAT_1_EDX]
            & CPUID_EXT2_AMD_ALIASES);
     }
 
     if (!kvm_enabled()) {
-        env->cpuid_features &= TCG_FEATURES;
-        env->cpuid_ext_features &= TCG_EXT_FEATURES;
-        env->cpuid_ext2_features &= (TCG_EXT2_FEATURES
+        env->features[FEAT_1_EDX] &= TCG_FEATURES;
+        env->features[FEAT_1_ECX] &= TCG_EXT_FEATURES;
+        env->features[FEAT_8000_0001_EDX] &= (TCG_EXT2_FEATURES
 #ifdef TARGET_X86_64
             | CPUID_EXT2_SYSCALL | CPUID_EXT2_LM
 #endif
             );
-        env->cpuid_ext3_features &= TCG_EXT3_FEATURES;
-        env->cpuid_svm_features &= TCG_SVM_FEATURES;
+        env->features[FEAT_8000_0001_ECX] &= TCG_EXT3_FEATURES;
+        env->features[FEAT_SVM] &= TCG_SVM_FEATURES;
     } else {
         if (check_cpuid && kvm_check_features_against_host(cpu)
             && enforce_cpuid) {
@@ -2167,7 +2307,7 @@
 #ifndef CONFIG_USER_ONLY
     qemu_register_reset(x86_cpu_machine_reset_cb, cpu);
 
-    if (cpu->env.cpuid_features & CPUID_APIC || smp_cpus > 1) {
+    if (cpu->env.features[FEAT_1_EDX] & CPUID_APIC || smp_cpus > 1) {
         x86_cpu_apic_create(cpu, &local_err);
         if (local_err != NULL) {
             goto out;
@@ -2259,6 +2399,9 @@
     object_property_add(obj, "tsc-frequency", "int",
                         x86_cpuid_get_tsc_freq,
                         x86_cpuid_set_tsc_freq, NULL, NULL, NULL);
+    object_property_add(obj, "apic-id", "int",
+                        x86_cpuid_get_apic_id,
+                        x86_cpuid_set_apic_id, NULL, NULL, NULL);
 
     env->cpuid_apic_id = x86_cpu_apic_id_from_index(cs->cpu_index);
 
@@ -2272,6 +2415,14 @@
     }
 }
 
+static int64_t x86_cpu_get_arch_id(CPUState *cs)
+{
+    X86CPU *cpu = X86_CPU(cs);
+    CPUX86State *env = &cpu->env;
+
+    return env->cpuid_apic_id;
+}
+
 static void x86_cpu_common_class_init(ObjectClass *oc, void *data)
 {
     X86CPUClass *xcc = X86_CPU_CLASS(oc);
@@ -2280,12 +2431,21 @@
 
     xcc->parent_realize = dc->realize;
     dc->realize = x86_cpu_realizefn;
+    dc->bus_type = TYPE_ICC_BUS;
 
     xcc->parent_reset = cc->reset;
     cc->reset = x86_cpu_reset;
 
     cc->do_interrupt = x86_cpu_do_interrupt;
+#ifndef CONFIG_USER_ONLY
+    cc->write_elf64_note = x86_cpu_write_elf64_note;
+    cc->write_elf64_qemunote = x86_cpu_write_elf64_qemunote;
+    cc->write_elf32_note = x86_cpu_write_elf32_note;
+    cc->write_elf32_qemunote = x86_cpu_write_elf32_qemunote;
+#endif
     cpu_class_set_vmsd(cc, &vmstate_x86_cpu);
+
+    cc->get_arch_id = x86_cpu_get_arch_id;
 }
 
 static const TypeInfo x86_cpu_type_info = {
diff --git a/target-i386/cpu.h b/target-i386/cpu.h
index a1614e8..3e2e9f6 100644
--- a/target-i386/cpu.h
+++ b/target-i386/cpu.h
@@ -836,22 +836,15 @@
 
     /* processor features (e.g. for CPUID insn) */
     uint32_t cpuid_level;
+    uint32_t cpuid_xlevel;
+    uint32_t cpuid_xlevel2;
     uint32_t cpuid_vendor1;
     uint32_t cpuid_vendor2;
     uint32_t cpuid_vendor3;
     uint32_t cpuid_version;
-    uint32_t cpuid_features;
-    uint32_t cpuid_ext_features;
-    uint32_t cpuid_xlevel;
+    FeatureWordArray features;
     uint32_t cpuid_model[12];
-    uint32_t cpuid_ext2_features;
-    uint32_t cpuid_ext3_features;
     uint32_t cpuid_apic_id;
-    /* 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_features;
 
     /* MTRRs */
     uint64_t mtrr_fixed[11];
@@ -865,8 +858,6 @@
     uint8_t soft_interrupt;
     uint8_t has_error_code;
     uint32_t sipi_vector;
-    uint32_t cpuid_kvm_features;
-    uint32_t cpuid_svm_features;
     bool tsc_valid;
     int tsc_khz;
     void *kvm_xsave_buf;
@@ -897,7 +888,8 @@
 #include "cpu-qom.h"
 
 X86CPU *cpu_x86_init(const char *cpu_model);
-X86CPU *cpu_x86_create(const char *cpu_model, Error **errp);
+X86CPU *cpu_x86_create(const char *cpu_model, DeviceState *icc_bridge,
+                       Error **errp);
 int cpu_x86_exec(CPUX86State *s);
 void x86_cpu_list(FILE *f, fprintf_function cpu_fprintf);
 void x86_cpudef_setup(void);
@@ -1270,5 +1262,6 @@
 void enable_compat_apic_id_mode(void);
 
 #define APIC_DEFAULT_ADDRESS 0xfee00000
+#define APIC_SPACE_SIZE      0x100000
 
 #endif /* CPU_I386_H */
diff --git a/target-i386/helper.c b/target-i386/helper.c
index 282494f..158710a 100644
--- a/target-i386/helper.c
+++ b/target-i386/helper.c
@@ -463,7 +463,7 @@
         tlb_flush(env, 1);
     }
     /* SSE handling */
-    if (!(env->cpuid_features & CPUID_SSE)) {
+    if (!(env->features[FEAT_1_EDX] & CPUID_SSE)) {
         new_cr4 &= ~CR4_OSFXSR_MASK;
     }
     env->hflags &= ~HF_OSFXSR_MASK;
@@ -471,7 +471,7 @@
         env->hflags |= HF_OSFXSR_MASK;
     }
 
-    if (!(env->cpuid_7_0_ebx_features & CPUID_7_0_EBX_SMAP)) {
+    if (!(env->features[FEAT_7_0_EBX] & CPUID_7_0_EBX_SMAP)) {
         new_cr4 &= ~CR4_SMAP_MASK;
     }
     env->hflags &= ~HF_SMAP_MASK;
diff --git a/target-i386/kvm.c b/target-i386/kvm.c
index 0e7cc81..9ffb6ca 100644
--- a/target-i386/kvm.c
+++ b/target-i386/kvm.c
@@ -454,7 +454,7 @@
     c = &cpuid_data.entries[cpuid_i++];
     memset(c, 0, sizeof(*c));
     c->function = KVM_CPUID_FEATURES;
-    c->eax = env->cpuid_kvm_features;
+    c->eax = env->features[FEAT_KVM];
 
     if (hyperv_enabled()) {
         memcpy(signature, "Hv#1\0\0\0\0\0\0\0\0", 12);
@@ -613,7 +613,8 @@
     cpuid_data.cpuid.nent = cpuid_i;
 
     if (((env->cpuid_version >> 8)&0xF) >= 6
-        && (env->cpuid_features&(CPUID_MCE|CPUID_MCA)) == (CPUID_MCE|CPUID_MCA)
+        && (env->features[FEAT_1_EDX] & (CPUID_MCE | CPUID_MCA)) ==
+           (CPUID_MCE | CPUID_MCA)
         && kvm_check_extension(cs->kvm_state, KVM_CAP_MCE) > 0) {
         uint64_t mcg_cap;
         int banks;
diff --git a/target-i386/misc_helper.c b/target-i386/misc_helper.c
index dfbc07b..ec834fc 100644
--- a/target-i386/misc_helper.c
+++ b/target-i386/misc_helper.c
@@ -291,22 +291,22 @@
             uint64_t update_mask;
 
             update_mask = 0;
-            if (env->cpuid_ext2_features & CPUID_EXT2_SYSCALL) {
+            if (env->features[FEAT_8000_0001_EDX] & CPUID_EXT2_SYSCALL) {
                 update_mask |= MSR_EFER_SCE;
             }
-            if (env->cpuid_ext2_features & CPUID_EXT2_LM) {
+            if (env->features[FEAT_8000_0001_EDX] & CPUID_EXT2_LM) {
                 update_mask |= MSR_EFER_LME;
             }
-            if (env->cpuid_ext2_features & CPUID_EXT2_FFXSR) {
+            if (env->features[FEAT_8000_0001_EDX] & CPUID_EXT2_FFXSR) {
                 update_mask |= MSR_EFER_FFXSR;
             }
-            if (env->cpuid_ext2_features & CPUID_EXT2_NX) {
+            if (env->features[FEAT_8000_0001_EDX] & CPUID_EXT2_NX) {
                 update_mask |= MSR_EFER_NXE;
             }
-            if (env->cpuid_ext3_features & CPUID_EXT3_SVM) {
+            if (env->features[FEAT_8000_0001_ECX] & CPUID_EXT3_SVM) {
                 update_mask |= MSR_EFER_SVME;
             }
-            if (env->cpuid_ext2_features & CPUID_EXT2_FFXSR) {
+            if (env->features[FEAT_8000_0001_EDX] & CPUID_EXT2_FFXSR) {
                 update_mask |= MSR_EFER_FFXSR;
             }
             cpu_load_efer(env, (env->efer & ~update_mask) |
@@ -513,7 +513,7 @@
         val = env->mtrr_deftype;
         break;
     case MSR_MTRRcap:
-        if (env->cpuid_features & CPUID_MTRR) {
+        if (env->features[FEAT_1_EDX] & CPUID_MTRR) {
             val = MSR_MTRRcap_VCNT | MSR_MTRRcap_FIXRANGE_SUPPORT |
                 MSR_MTRRcap_WC_SUPPORTED;
         } else {
diff --git a/target-i386/translate.c b/target-i386/translate.c
index 40f891d..524a0b4 100644
--- a/target-i386/translate.c
+++ b/target-i386/translate.c
@@ -8290,11 +8290,11 @@
     if (flags & HF_SOFTMMU_MASK) {
         dc->mem_index = (cpu_mmu_index(env) + 1) << 2;
     }
-    dc->cpuid_features = env->cpuid_features;
-    dc->cpuid_ext_features = env->cpuid_ext_features;
-    dc->cpuid_ext2_features = env->cpuid_ext2_features;
-    dc->cpuid_ext3_features = env->cpuid_ext3_features;
-    dc->cpuid_7_0_ebx_features = env->cpuid_7_0_ebx_features;
+    dc->cpuid_features = env->features[FEAT_1_EDX];
+    dc->cpuid_ext_features = env->features[FEAT_1_ECX];
+    dc->cpuid_ext2_features = env->features[FEAT_8000_0001_EDX];
+    dc->cpuid_ext3_features = env->features[FEAT_8000_0001_ECX];
+    dc->cpuid_7_0_ebx_features = env->features[FEAT_7_0_EBX];
 #ifdef TARGET_X86_64
     dc->lma = (flags >> HF_LMA_SHIFT) & 1;
     dc->code64 = (flags >> HF_CS64_SHIFT) & 1;
diff --git a/vl.c b/vl.c
index b5a547e..6e6225f 100644
--- a/vl.c
+++ b/vl.c
@@ -267,7 +267,6 @@
     NOTIFIER_LIST_INITIALIZER(machine_init_done_notifiers);
 
 static bool tcg_allowed = true;
-bool kvm_allowed;
 bool xen_allowed;
 uint32_t xen_domid;
 enum xen_mode xen_mode = XEN_EMULATE;
@@ -4416,7 +4415,6 @@
 
     os_setup_post();
 
-    resume_all_vcpus();
     main_loop();
     bdrv_close_all();
     pause_all_vcpus();