hw/intc/apic_common.c - qemu - Git at Google

 /*
  *  APIC support - common bits of emulated and KVM kernel model
  *
  *  Copyright (c) 2004-2005 Fabrice Bellard
  *  Copyright (c) 2011      Jan Kiszka, Siemens AG
  *
  * 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 "qemu/osdep.h"
 #include "qapi/error.h"
 #include "hw/i386/apic.h"
 #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;

 void cpu_set_apic_base(DeviceState *dev, uint64_t val)
 {
     trace_cpu_set_apic_base(val);

     if (dev) {
         APICCommonState *s = APIC_COMMON(dev);
         APICCommonClass *info = APIC_COMMON_GET_CLASS(s);
         info->set_base(s, val);
     }
 }

 uint64_t cpu_get_apic_base(DeviceState *dev)
 {
     if (dev) {
         APICCommonState *s = APIC_COMMON(dev);
         trace_cpu_get_apic_base((uint64_t)s->apicbase);
         return s->apicbase;
     } else {
         trace_cpu_get_apic_base(MSR_IA32_APICBASE_BSP);
         return MSR_IA32_APICBASE_BSP;
     }
 }

 void cpu_set_apic_tpr(DeviceState *dev, uint8_t val)
 {
     APICCommonState *s;
     APICCommonClass *info;

     if (!dev) {
         return;
     }

     s = APIC_COMMON(dev);
     info = APIC_COMMON_GET_CLASS(s);

     info->set_tpr(s, val);
 }

 uint8_t cpu_get_apic_tpr(DeviceState *dev)
 {
     APICCommonState *s;
     APICCommonClass *info;

     if (!dev) {
         return 0;
     }

     s = APIC_COMMON(dev);
     info = APIC_COMMON_GET_CLASS(s);

     return info->get_tpr(s);
 }

 void apic_enable_tpr_access_reporting(DeviceState *dev, bool enable)
 {
     APICCommonState *s = APIC_COMMON(dev);
     APICCommonClass *info = APIC_COMMON_GET_CLASS(s);

     apic_report_tpr_access = enable;
     if (info->enable_tpr_reporting) {
         info->enable_tpr_reporting(s, enable);
     }
 }

 void apic_enable_vapic(DeviceState *dev, hwaddr paddr)
 {
     APICCommonState *s = APIC_COMMON(dev);
     APICCommonClass *info = APIC_COMMON_GET_CLASS(s);

     s->vapic_paddr = paddr;
     info->vapic_base_update(s);
 }

 void apic_handle_tpr_access_report(DeviceState *dev, target_ulong ip,
                                    TPRAccess access)
 {
     APICCommonState *s = APIC_COMMON(dev);

     vapic_report_tpr_access(s->vapic, CPU(s->cpu), ip, access);
 }

 void apic_report_irq_delivered(int delivered)
 {
     apic_irq_delivered += delivered;

     trace_apic_report_irq_delivered(apic_irq_delivered);
 }

 void apic_reset_irq_delivered(void)
 {
     /* Copy this into a local variable to encourage gcc to emit a plain
      * register for a sys/sdt.h marker.  For details on this workaround, see:
      * https://sourceware.org/bugzilla/show_bug.cgi?id=13296
      */
     volatile int a_i_d = apic_irq_delivered;
     trace_apic_reset_irq_delivered(a_i_d);

     apic_irq_delivered = 0;
 }

 int apic_get_irq_delivered(void)
 {
     trace_apic_get_irq_delivered(apic_irq_delivered);

     return apic_irq_delivered;
 }

 void apic_deliver_nmi(DeviceState *dev)
 {
     APICCommonState *s = APIC_COMMON(dev);
     APICCommonClass *info = APIC_COMMON_GET_CLASS(s);

     info->external_nmi(s);
 }

 bool apic_next_timer(APICCommonState *s, int64_t current_time)
 {
     int64_t d;

     /* We need to store the timer state separately to support APIC
      * implementations that maintain a non-QEMU timer, e.g. inside the
      * host kernel. This open-coded state allows us to migrate between
      * both models. */
     s->timer_expiry = -1;

     if (s->lvt[APIC_LVT_TIMER] & APIC_LVT_MASKED) {
         return false;
     }

     d = (current_time - s->initial_count_load_time) >> s->count_shift;

     if (s->lvt[APIC_LVT_TIMER] & APIC_LVT_TIMER_PERIODIC) {
         if (!s->initial_count) {
             return false;
         }
         d = ((d / ((uint64_t)s->initial_count + 1)) + 1) *
             ((uint64_t)s->initial_count + 1);
     } else {
         if (d >= s->initial_count) {
             return false;
         }
         d = (uint64_t)s->initial_count + 1;
     }
     s->next_time = s->initial_count_load_time + (d << s->count_shift);
     s->timer_expiry = s->next_time;
     return true;
 }

 void apic_init_reset(DeviceState *dev)
 {
     APICCommonState *s;
     APICCommonClass *info;
     int i;

     if (!dev) {
         return;
     }
     s = APIC_COMMON(dev);
     s->tpr = 0;
     s->spurious_vec = 0xff;
     s->log_dest = 0;
     s->dest_mode = 0xf;
     memset(s->isr, 0, sizeof(s->isr));
     memset(s->tmr, 0, sizeof(s->tmr));
     memset(s->irr, 0, sizeof(s->irr));
     for (i = 0; i < APIC_LVT_NB; i++) {
         s->lvt[i] = APIC_LVT_MASKED;
     }
     s->esr = 0;
     memset(s->icr, 0, sizeof(s->icr));
     s->divide_conf = 0;
     s->count_shift = 0;
     s->initial_count = 0;
     s->initial_count_load_time = 0;
     s->next_time = 0;
     s->wait_for_sipi = !cpu_is_bsp(s->cpu);

     if (s->timer) {
         timer_del(s->timer);
     }
     s->timer_expiry = -1;

     info = APIC_COMMON_GET_CLASS(s);
     if (info->reset) {
         info->reset(s);
     }
 }

 void apic_designate_bsp(DeviceState *dev, bool bsp)
 {
     if (dev == NULL) {
         return;
     }

     APICCommonState *s = APIC_COMMON(dev);
     if (bsp) {
         s->apicbase |= MSR_IA32_APICBASE_BSP;
     } else {
         s->apicbase &= ~MSR_IA32_APICBASE_BSP;
     }
 }

 static void apic_reset_common(DeviceState *dev)
 {
     APICCommonState *s = APIC_COMMON(dev);
     APICCommonClass *info = APIC_COMMON_GET_CLASS(s);
     uint32_t bsp;

     bsp = s->apicbase & MSR_IA32_APICBASE_BSP;
     s->apicbase = APIC_DEFAULT_ADDRESS | bsp | MSR_IA32_APICBASE_ENABLE;

     s->vapic_paddr = 0;
     info->vapic_base_update(s);

     apic_init_reset(dev);
 }

 /* This function is only used for old state version 1 and 2 */
 static int apic_load_old(QEMUFile *f, void *opaque, int version_id)
 {
     APICCommonState *s = opaque;
     APICCommonClass *info = APIC_COMMON_GET_CLASS(s);
     int i;

     if (version_id > 2) {
         return -EINVAL;
     }

     /* XXX: what if the base changes? (registered memory regions) */
     qemu_get_be32s(f, &s->apicbase);
     qemu_get_8s(f, &s->id);
     qemu_get_8s(f, &s->arb_id);
     qemu_get_8s(f, &s->tpr);
     qemu_get_be32s(f, &s->spurious_vec);
     qemu_get_8s(f, &s->log_dest);
     qemu_get_8s(f, &s->dest_mode);
     for (i = 0; i < 8; i++) {
         qemu_get_be32s(f, &s->isr[i]);
         qemu_get_be32s(f, &s->tmr[i]);
         qemu_get_be32s(f, &s->irr[i]);
     }
     for (i = 0; i < APIC_LVT_NB; i++) {
         qemu_get_be32s(f, &s->lvt[i]);
     }
     qemu_get_be32s(f, &s->esr);
     qemu_get_be32s(f, &s->icr[0]);
     qemu_get_be32s(f, &s->icr[1]);
     qemu_get_be32s(f, &s->divide_conf);
     s->count_shift = qemu_get_be32(f);
     qemu_get_be32s(f, &s->initial_count);
     s->initial_count_load_time = qemu_get_be64(f);
     s->next_time = qemu_get_be64(f);

     if (version_id >= 2) {
         s->timer_expiry = qemu_get_be64(f);
     }

     if (info->post_load) {
         info->post_load(s);
     }
     return 0;
 }

 static void apic_common_realize(DeviceState *dev, Error **errp)
 {
     APICCommonState *s = APIC_COMMON(dev);
     APICCommonClass *info;
     static DeviceState *vapic;
     static int apic_no;

     if (apic_no >= MAX_APICS) {
         error_setg(errp, "%s initialization failed.",
                    object_get_typename(OBJECT(dev)));
         return;
     }
     s->idx = apic_no++;

     info = APIC_COMMON_GET_CLASS(s);
     info->realize(dev, errp);

     /* Note: We need at least 1M to map the VAPIC option ROM */
     if (!vapic && s->vapic_control & VAPIC_ENABLE_MASK &&
         ram_size >= 1024 * 1024) {
         vapic = sysbus_create_simple("kvmvapic", -1, NULL);
     }
     s->vapic = vapic;
     if (apic_report_tpr_access && info->enable_tpr_reporting) {
         info->enable_tpr_reporting(s, true);
     }

 }

 static int apic_pre_load(void *opaque)
 {
     APICCommonState *s = APIC_COMMON(opaque);

     /* The default is !cpu_is_bsp(s->cpu), but the common value is 0
      * so that's what apic_common_sipi_needed checks for.  Reset to
      * the value that is assumed when the apic_sipi subsection is
      * absent.
      */
     s->wait_for_sipi = 0;
     return 0;
 }

 static void apic_dispatch_pre_save(void *opaque)
 {
     APICCommonState *s = APIC_COMMON(opaque);
     APICCommonClass *info = APIC_COMMON_GET_CLASS(s);

     if (info->pre_save) {
         info->pre_save(s);
     }
 }

 static int apic_dispatch_post_load(void *opaque, int version_id)
 {
     APICCommonState *s = APIC_COMMON(opaque);
     APICCommonClass *info = APIC_COMMON_GET_CLASS(s);

     if (info->post_load) {
         info->post_load(s);
     }
     return 0;
 }

 static bool apic_common_sipi_needed(void *opaque)
 {
     APICCommonState *s = APIC_COMMON(opaque);
     return s->wait_for_sipi != 0;
 }

 static const VMStateDescription vmstate_apic_common_sipi = {
     .name = "apic_sipi",
     .version_id = 1,
     .minimum_version_id = 1,
     .needed = apic_common_sipi_needed,
     .fields = (VMStateField[]) {
         VMSTATE_INT32(sipi_vector, APICCommonState),
         VMSTATE_INT32(wait_for_sipi, APICCommonState),
         VMSTATE_END_OF_LIST()
     }
 };

 static const VMStateDescription vmstate_apic_common = {
     .name = "apic",
     .version_id = 3,
     .minimum_version_id = 3,
     .minimum_version_id_old = 1,
     .load_state_old = apic_load_old,
     .pre_load = apic_pre_load,
     .pre_save = apic_dispatch_pre_save,
     .post_load = apic_dispatch_post_load,
     .fields = (VMStateField[]) {
         VMSTATE_UINT32(apicbase, APICCommonState),
         VMSTATE_UINT8(id, APICCommonState),
         VMSTATE_UINT8(arb_id, APICCommonState),
         VMSTATE_UINT8(tpr, APICCommonState),
         VMSTATE_UINT32(spurious_vec, APICCommonState),
         VMSTATE_UINT8(log_dest, APICCommonState),
         VMSTATE_UINT8(dest_mode, APICCommonState),
         VMSTATE_UINT32_ARRAY(isr, APICCommonState, 8),
         VMSTATE_UINT32_ARRAY(tmr, APICCommonState, 8),
         VMSTATE_UINT32_ARRAY(irr, APICCommonState, 8),
         VMSTATE_UINT32_ARRAY(lvt, APICCommonState, APIC_LVT_NB),
         VMSTATE_UINT32(esr, APICCommonState),
         VMSTATE_UINT32_ARRAY(icr, APICCommonState, 2),
         VMSTATE_UINT32(divide_conf, APICCommonState),
         VMSTATE_INT32(count_shift, APICCommonState),
         VMSTATE_UINT32(initial_count, APICCommonState),
         VMSTATE_INT64(initial_count_load_time, APICCommonState),
         VMSTATE_INT64(next_time, APICCommonState),
         VMSTATE_INT64(timer_expiry,
                       APICCommonState), /* open-coded timer state */
         VMSTATE_END_OF_LIST()
     },
     .subsections = (const VMStateDescription*[]) {
         &vmstate_apic_common_sipi,
         NULL
     }
 };

 static Property apic_properties_common[] = {
     DEFINE_PROP_UINT8("id", APICCommonState, id, -1),
     DEFINE_PROP_UINT8("version", APICCommonState, version, 0x14),
     DEFINE_PROP_BIT("vapic", APICCommonState, vapic_control, VAPIC_ENABLE_BIT,
                     true),
     DEFINE_PROP_END_OF_LIST(),
 };

 static void apic_common_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);

     dc->vmsd = &vmstate_apic_common;
     dc->reset = apic_reset_common;
     dc->props = apic_properties_common;
     dc->realize = apic_common_realize;
     /*
      * Reason: APIC and CPU need to be wired up by
      * x86_cpu_apic_create()
      */
     dc->cannot_instantiate_with_device_add_yet = true;
 }

 static const TypeInfo apic_common_type = {
     .name = TYPE_APIC_COMMON,
     .parent = TYPE_DEVICE,
     .instance_size = sizeof(APICCommonState),
     .class_size = sizeof(APICCommonClass),
     .class_init = apic_common_class_init,
     .abstract = true,
 };

 static void apic_common_register_types(void)
 {
     type_register_static(&apic_common_type);
 }

 type_init(apic_common_register_types)
	/*
	* APIC support - common bits of emulated and KVM kernel model
	*
	* Copyright (c) 2004-2005 Fabrice Bellard
	* Copyright (c) 2011 Jan Kiszka, Siemens AG
	*
	* 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 "qemu/osdep.h"
	#include "qapi/error.h"
	#include "hw/i386/apic.h"
	#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;

	void cpu_set_apic_base(DeviceState *dev, uint64_t val)
	{
	trace_cpu_set_apic_base(val);

	if (dev) {
	APICCommonState *s = APIC_COMMON(dev);
	APICCommonClass *info = APIC_COMMON_GET_CLASS(s);
	info->set_base(s, val);
	}
	}

	uint64_t cpu_get_apic_base(DeviceState *dev)
	{
	if (dev) {
	APICCommonState *s = APIC_COMMON(dev);
	trace_cpu_get_apic_base((uint64_t)s->apicbase);
	return s->apicbase;
	} else {
	trace_cpu_get_apic_base(MSR_IA32_APICBASE_BSP);
	return MSR_IA32_APICBASE_BSP;
	}
	}

	void cpu_set_apic_tpr(DeviceState *dev, uint8_t val)
	{
	APICCommonState *s;
	APICCommonClass *info;

	if (!dev) {
	return;
	}

	s = APIC_COMMON(dev);
	info = APIC_COMMON_GET_CLASS(s);

	info->set_tpr(s, val);
	}

	uint8_t cpu_get_apic_tpr(DeviceState *dev)
	{
	APICCommonState *s;
	APICCommonClass *info;

	if (!dev) {
	return 0;
	}

	s = APIC_COMMON(dev);
	info = APIC_COMMON_GET_CLASS(s);

	return info->get_tpr(s);
	}

	void apic_enable_tpr_access_reporting(DeviceState *dev, bool enable)
	{
	APICCommonState *s = APIC_COMMON(dev);
	APICCommonClass *info = APIC_COMMON_GET_CLASS(s);

	apic_report_tpr_access = enable;
	if (info->enable_tpr_reporting) {
	info->enable_tpr_reporting(s, enable);
	}
	}

	void apic_enable_vapic(DeviceState *dev, hwaddr paddr)
	{
	APICCommonState *s = APIC_COMMON(dev);
	APICCommonClass *info = APIC_COMMON_GET_CLASS(s);

	s->vapic_paddr = paddr;
	info->vapic_base_update(s);
	}

	void apic_handle_tpr_access_report(DeviceState *dev, target_ulong ip,
	TPRAccess access)
	{
	APICCommonState *s = APIC_COMMON(dev);

	vapic_report_tpr_access(s->vapic, CPU(s->cpu), ip, access);
	}

	void apic_report_irq_delivered(int delivered)
	{
	apic_irq_delivered += delivered;

	trace_apic_report_irq_delivered(apic_irq_delivered);
	}

	void apic_reset_irq_delivered(void)
	{
	/* Copy this into a local variable to encourage gcc to emit a plain
	* register for a sys/sdt.h marker. For details on this workaround, see:
	* https://sourceware.org/bugzilla/show_bug.cgi?id=13296
	*/
	volatile int a_i_d = apic_irq_delivered;
	trace_apic_reset_irq_delivered(a_i_d);

	apic_irq_delivered = 0;
	}

	int apic_get_irq_delivered(void)
	{
	trace_apic_get_irq_delivered(apic_irq_delivered);

	return apic_irq_delivered;
	}

	void apic_deliver_nmi(DeviceState *dev)
	{
	APICCommonState *s = APIC_COMMON(dev);
	APICCommonClass *info = APIC_COMMON_GET_CLASS(s);

	info->external_nmi(s);
	}

	bool apic_next_timer(APICCommonState *s, int64_t current_time)
	{
	int64_t d;

	/* We need to store the timer state separately to support APIC
	* implementations that maintain a non-QEMU timer, e.g. inside the
	* host kernel. This open-coded state allows us to migrate between
	* both models. */
	s->timer_expiry = -1;

	if (s->lvt[APIC_LVT_TIMER] & APIC_LVT_MASKED) {
	return false;
	}

	d = (current_time - s->initial_count_load_time) >> s->count_shift;

	if (s->lvt[APIC_LVT_TIMER] & APIC_LVT_TIMER_PERIODIC) {
	if (!s->initial_count) {
	return false;
	}
	d = ((d / ((uint64_t)s->initial_count + 1)) + 1) *
	((uint64_t)s->initial_count + 1);
	} else {
	if (d >= s->initial_count) {
	return false;
	}
	d = (uint64_t)s->initial_count + 1;
	}
	s->next_time = s->initial_count_load_time + (d << s->count_shift);
	s->timer_expiry = s->next_time;
	return true;
	}

	void apic_init_reset(DeviceState *dev)
	{
	APICCommonState *s;
	APICCommonClass *info;
	int i;

	if (!dev) {
	return;
	}
	s = APIC_COMMON(dev);
	s->tpr = 0;
	s->spurious_vec = 0xff;
	s->log_dest = 0;
	s->dest_mode = 0xf;
	memset(s->isr, 0, sizeof(s->isr));
	memset(s->tmr, 0, sizeof(s->tmr));
	memset(s->irr, 0, sizeof(s->irr));
	for (i = 0; i < APIC_LVT_NB; i++) {
	s->lvt[i] = APIC_LVT_MASKED;
	}
	s->esr = 0;
	memset(s->icr, 0, sizeof(s->icr));
	s->divide_conf = 0;
	s->count_shift = 0;
	s->initial_count = 0;
	s->initial_count_load_time = 0;
	s->next_time = 0;
	s->wait_for_sipi = !cpu_is_bsp(s->cpu);

	if (s->timer) {
	timer_del(s->timer);
	}
	s->timer_expiry = -1;

	info = APIC_COMMON_GET_CLASS(s);
	if (info->reset) {
	info->reset(s);
	}
	}

	void apic_designate_bsp(DeviceState *dev, bool bsp)
	{
	if (dev == NULL) {
	return;
	}

	APICCommonState *s = APIC_COMMON(dev);
	if (bsp) {
	s->apicbase \|= MSR_IA32_APICBASE_BSP;
	} else {
	s->apicbase &= ~MSR_IA32_APICBASE_BSP;
	}
	}

	static void apic_reset_common(DeviceState *dev)
	{
	APICCommonState *s = APIC_COMMON(dev);
	APICCommonClass *info = APIC_COMMON_GET_CLASS(s);
	uint32_t bsp;

	bsp = s->apicbase & MSR_IA32_APICBASE_BSP;
	s->apicbase = APIC_DEFAULT_ADDRESS \| bsp \| MSR_IA32_APICBASE_ENABLE;

	s->vapic_paddr = 0;
	info->vapic_base_update(s);

	apic_init_reset(dev);
	}

	/* This function is only used for old state version 1 and 2 */
	static int apic_load_old(QEMUFile f, void opaque, int version_id)
	{
	APICCommonState *s = opaque;
	APICCommonClass *info = APIC_COMMON_GET_CLASS(s);
	int i;

	if (version_id > 2) {
	return -EINVAL;
	}

	/* XXX: what if the base changes? (registered memory regions) */
	qemu_get_be32s(f, &s->apicbase);
	qemu_get_8s(f, &s->id);
	qemu_get_8s(f, &s->arb_id);
	qemu_get_8s(f, &s->tpr);
	qemu_get_be32s(f, &s->spurious_vec);
	qemu_get_8s(f, &s->log_dest);
	qemu_get_8s(f, &s->dest_mode);
	for (i = 0; i < 8; i++) {
	qemu_get_be32s(f, &s->isr[i]);
	qemu_get_be32s(f, &s->tmr[i]);
	qemu_get_be32s(f, &s->irr[i]);
	}
	for (i = 0; i < APIC_LVT_NB; i++) {
	qemu_get_be32s(f, &s->lvt[i]);
	}
	qemu_get_be32s(f, &s->esr);
	qemu_get_be32s(f, &s->icr[0]);
	qemu_get_be32s(f, &s->icr[1]);
	qemu_get_be32s(f, &s->divide_conf);
	s->count_shift = qemu_get_be32(f);
	qemu_get_be32s(f, &s->initial_count);
	s->initial_count_load_time = qemu_get_be64(f);
	s->next_time = qemu_get_be64(f);

	if (version_id >= 2) {
	s->timer_expiry = qemu_get_be64(f);
	}

	if (info->post_load) {
	info->post_load(s);
	}
	return 0;
	}

	static void apic_common_realize(DeviceState dev, Error *errp)
	{
	APICCommonState *s = APIC_COMMON(dev);
	APICCommonClass *info;
	static DeviceState *vapic;
	static int apic_no;

	if (apic_no >= MAX_APICS) {
	error_setg(errp, "%s initialization failed.",
	object_get_typename(OBJECT(dev)));
	return;
	}
	s->idx = apic_no++;

	info = APIC_COMMON_GET_CLASS(s);
	info->realize(dev, errp);

	/* Note: We need at least 1M to map the VAPIC option ROM */
	if (!vapic && s->vapic_control & VAPIC_ENABLE_MASK &&
	ram_size >= 1024 * 1024) {
	vapic = sysbus_create_simple("kvmvapic", -1, NULL);
	}
	s->vapic = vapic;
	if (apic_report_tpr_access && info->enable_tpr_reporting) {
	info->enable_tpr_reporting(s, true);
	}

	}

	static int apic_pre_load(void *opaque)
	{
	APICCommonState *s = APIC_COMMON(opaque);

	/* The default is !cpu_is_bsp(s->cpu), but the common value is 0
	* so that's what apic_common_sipi_needed checks for. Reset to
	* the value that is assumed when the apic_sipi subsection is
	* absent.
	*/
	s->wait_for_sipi = 0;
	return 0;
	}

	static void apic_dispatch_pre_save(void *opaque)
	{
	APICCommonState *s = APIC_COMMON(opaque);
	APICCommonClass *info = APIC_COMMON_GET_CLASS(s);

	if (info->pre_save) {
	info->pre_save(s);
	}
	}

	static int apic_dispatch_post_load(void *opaque, int version_id)
	{
	APICCommonState *s = APIC_COMMON(opaque);
	APICCommonClass *info = APIC_COMMON_GET_CLASS(s);

	if (info->post_load) {
	info->post_load(s);
	}
	return 0;
	}

	static bool apic_common_sipi_needed(void *opaque)
	{
	APICCommonState *s = APIC_COMMON(opaque);
	return s->wait_for_sipi != 0;
	}

	static const VMStateDescription vmstate_apic_common_sipi = {
	.name = "apic_sipi",
	.version_id = 1,
	.minimum_version_id = 1,
	.needed = apic_common_sipi_needed,
	.fields = (VMStateField[]) {
	VMSTATE_INT32(sipi_vector, APICCommonState),
	VMSTATE_INT32(wait_for_sipi, APICCommonState),
	VMSTATE_END_OF_LIST()
	}
	};

	static const VMStateDescription vmstate_apic_common = {
	.name = "apic",
	.version_id = 3,
	.minimum_version_id = 3,
	.minimum_version_id_old = 1,
	.load_state_old = apic_load_old,
	.pre_load = apic_pre_load,
	.pre_save = apic_dispatch_pre_save,
	.post_load = apic_dispatch_post_load,
	.fields = (VMStateField[]) {
	VMSTATE_UINT32(apicbase, APICCommonState),
	VMSTATE_UINT8(id, APICCommonState),
	VMSTATE_UINT8(arb_id, APICCommonState),
	VMSTATE_UINT8(tpr, APICCommonState),
	VMSTATE_UINT32(spurious_vec, APICCommonState),
	VMSTATE_UINT8(log_dest, APICCommonState),
	VMSTATE_UINT8(dest_mode, APICCommonState),
	VMSTATE_UINT32_ARRAY(isr, APICCommonState, 8),
	VMSTATE_UINT32_ARRAY(tmr, APICCommonState, 8),
	VMSTATE_UINT32_ARRAY(irr, APICCommonState, 8),
	VMSTATE_UINT32_ARRAY(lvt, APICCommonState, APIC_LVT_NB),
	VMSTATE_UINT32(esr, APICCommonState),
	VMSTATE_UINT32_ARRAY(icr, APICCommonState, 2),
	VMSTATE_UINT32(divide_conf, APICCommonState),
	VMSTATE_INT32(count_shift, APICCommonState),
	VMSTATE_UINT32(initial_count, APICCommonState),
	VMSTATE_INT64(initial_count_load_time, APICCommonState),
	VMSTATE_INT64(next_time, APICCommonState),
	VMSTATE_INT64(timer_expiry,
	APICCommonState), /* open-coded timer state */
	VMSTATE_END_OF_LIST()
	},
	.subsections = (const VMStateDescription*[]) {
	&vmstate_apic_common_sipi,
	NULL
	}
	};

	static Property apic_properties_common[] = {
	DEFINE_PROP_UINT8("id", APICCommonState, id, -1),
	DEFINE_PROP_UINT8("version", APICCommonState, version, 0x14),
	DEFINE_PROP_BIT("vapic", APICCommonState, vapic_control, VAPIC_ENABLE_BIT,
	true),
	DEFINE_PROP_END_OF_LIST(),
	};

	static void apic_common_class_init(ObjectClass klass, void data)
	{
	DeviceClass *dc = DEVICE_CLASS(klass);

	dc->vmsd = &vmstate_apic_common;
	dc->reset = apic_reset_common;
	dc->props = apic_properties_common;
	dc->realize = apic_common_realize;
	/*
	* Reason: APIC and CPU need to be wired up by
	* x86_cpu_apic_create()
	*/
	dc->cannot_instantiate_with_device_add_yet = true;
	}

	static const TypeInfo apic_common_type = {
	.name = TYPE_APIC_COMMON,
	.parent = TYPE_DEVICE,
	.instance_size = sizeof(APICCommonState),
	.class_size = sizeof(APICCommonClass),
	.class_init = apic_common_class_init,
	.abstract = true,
	};

	static void apic_common_register_types(void)
	{
	type_register_static(&apic_common_type);
	}

	type_init(apic_common_register_types)