target/s390x/cpu.c - qemu - Git at Google

 /*
  * QEMU S/390 CPU
  *
  * Copyright (c) 2009 Ulrich Hecht
  * Copyright (c) 2011 Alexander Graf
  * Copyright (c) 2012 SUSE LINUX Products GmbH
  * Copyright (c) 2012 IBM Corp.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation; either version 2 of the License, or
  * (at your option) any later version.
  *
  * This program 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
  * General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  */

 #include "qemu/osdep.h"
 #include "qapi/error.h"
 #include "cpu.h"
 #include "s390x-internal.h"
 #include "kvm/kvm_s390x.h"
 #include "sysemu/kvm.h"
 #include "qemu/module.h"
 #include "trace.h"
 #include "qapi/qapi-types-machine.h"
 #include "sysemu/hw_accel.h"
 #include "hw/qdev-properties.h"
 #include "hw/qdev-properties-system.h"
 #include "hw/resettable.h"
 #include "fpu/softfloat-helpers.h"
 #include "disas/capstone.h"
 #include "sysemu/tcg.h"
 #ifndef CONFIG_USER_ONLY
 #include "sysemu/reset.h"
 #endif
 #include "hw/s390x/cpu-topology.h"

 #define CR0_RESET       0xE0UL
 #define CR14_RESET      0xC2000000UL;

 #ifndef CONFIG_USER_ONLY
 static bool is_early_exception_psw(uint64_t mask, uint64_t addr)
 {
     if (mask & PSW_MASK_RESERVED) {
         return true;
     }

     switch (mask & (PSW_MASK_32 | PSW_MASK_64)) {
     case 0:
         return addr & ~0xffffffULL;
     case PSW_MASK_32:
         return addr & ~0x7fffffffULL;
     case PSW_MASK_32 | PSW_MASK_64:
         return false;
     default: /* PSW_MASK_64 */
         return true;
     }
 }
 #endif

 void s390_cpu_set_psw(CPUS390XState *env, uint64_t mask, uint64_t addr)
 {
 #ifndef CONFIG_USER_ONLY
     uint64_t old_mask = env->psw.mask;
 #endif

     env->psw.addr = addr;
     env->psw.mask = mask;

     /* KVM will handle all WAITs and trigger a WAIT exit on disabled_wait */
     if (!tcg_enabled()) {
         return;
     }
     env->cc_op = (mask >> 44) & 3;

 #ifndef CONFIG_USER_ONLY
     if (is_early_exception_psw(mask, addr)) {
         env->int_pgm_ilen = 0;
         trigger_pgm_exception(env, PGM_SPECIFICATION);
         return;
     }

     if ((old_mask ^ mask) & PSW_MASK_PER) {
         s390_cpu_recompute_watchpoints(env_cpu(env));
     }

     if (mask & PSW_MASK_WAIT) {
         s390_handle_wait(env_archcpu(env));
     }
 #endif
 }

 uint64_t s390_cpu_get_psw_mask(CPUS390XState *env)
 {
     uint64_t r = env->psw.mask;

     if (tcg_enabled()) {
         uint64_t cc = calc_cc(env, env->cc_op, env->cc_src,
                               env->cc_dst, env->cc_vr);

         assert(cc <= 3);
         r &= ~PSW_MASK_CC;
         r |= cc << 44;
     }

     return r;
 }

 static void s390_cpu_set_pc(CPUState *cs, vaddr value)
 {
     S390CPU *cpu = S390_CPU(cs);

     cpu->env.psw.addr = value;
 }

 static vaddr s390_cpu_get_pc(CPUState *cs)
 {
     S390CPU *cpu = S390_CPU(cs);

     return cpu->env.psw.addr;
 }

 static bool s390_cpu_has_work(CPUState *cs)
 {
     S390CPU *cpu = S390_CPU(cs);

     /* STOPPED cpus can never wake up */
     if (s390_cpu_get_state(cpu) != S390_CPU_STATE_LOAD &&
         s390_cpu_get_state(cpu) != S390_CPU_STATE_OPERATING) {
         return false;
     }

     if (!(cs->interrupt_request & CPU_INTERRUPT_HARD)) {
         return false;
     }

     return s390_cpu_has_int(cpu);
 }

 static int s390x_cpu_mmu_index(CPUState *cs, bool ifetch)
 {
     return s390x_env_mmu_index(cpu_env(cs), ifetch);
 }

 static void s390_query_cpu_fast(CPUState *cpu, CpuInfoFast *value)
 {
     S390CPU *s390_cpu = S390_CPU(cpu);

     value->u.s390x.cpu_state = s390_cpu->env.cpu_state;
 #if !defined(CONFIG_USER_ONLY)
     if (s390_has_topology()) {
         value->u.s390x.has_dedicated = true;
         value->u.s390x.dedicated = s390_cpu->env.dedicated;
         value->u.s390x.has_entitlement = true;
         value->u.s390x.entitlement = s390_cpu->env.entitlement;
     }
 #endif
 }

 /* S390CPUClass Resettable reset_hold phase method */
 static void s390_cpu_reset_hold(Object *obj, ResetType type)
 {
     S390CPU *cpu = S390_CPU(obj);
     S390CPUClass *scc = S390_CPU_GET_CLASS(cpu);
     CPUS390XState *env = &cpu->env;

     if (scc->parent_phases.hold) {
         scc->parent_phases.hold(obj, type);
     }
     cpu->env.sigp_order = 0;
     s390_cpu_set_state(S390_CPU_STATE_STOPPED, cpu);

     switch (type) {
     default:
         /* RESET_TYPE_COLD: power on or "clear" reset */
         memset(env, 0, offsetof(CPUS390XState, start_initial_reset_fields));
         /* fall through */
     case RESET_TYPE_S390_CPU_INITIAL:
         /* initial reset does not clear everything! */
         memset(&env->start_initial_reset_fields, 0,
                offsetof(CPUS390XState, start_normal_reset_fields) -
                offsetof(CPUS390XState, start_initial_reset_fields));

         /* architectured initial value for Breaking-Event-Address register */
         env->gbea = 1;

         /* architectured initial values for CR 0 and 14 */
         env->cregs[0] = CR0_RESET;
         env->cregs[14] = CR14_RESET;

 #if defined(CONFIG_USER_ONLY)
         /* user mode should always be allowed to use the full FPU */
         env->cregs[0] |= CR0_AFP;
         if (s390_has_feat(S390_FEAT_VECTOR)) {
             env->cregs[0] |= CR0_VECTOR;
         }
 #endif

         /* tininess for underflow is detected before rounding */
         set_float_detect_tininess(float_tininess_before_rounding,
                                   &env->fpu_status);
         set_float_2nan_prop_rule(float_2nan_prop_s_ab, &env->fpu_status);
        /* fall through */
     case RESET_TYPE_S390_CPU_NORMAL:
         env->psw.mask &= ~PSW_MASK_RI;
         memset(&env->start_normal_reset_fields, 0,
                offsetof(CPUS390XState, end_reset_fields) -
                offsetof(CPUS390XState, start_normal_reset_fields));

         env->pfault_token = -1UL;
         env->bpbc = false;
         break;
     }

     /* Reset state inside the kernel that we cannot access yet from QEMU. */
     if (kvm_enabled()) {
         switch (type) {
         default:
             kvm_s390_reset_vcpu_clear(cpu);
             break;
         case RESET_TYPE_S390_CPU_INITIAL:
             kvm_s390_reset_vcpu_initial(cpu);
             break;
         case RESET_TYPE_S390_CPU_NORMAL:
             kvm_s390_reset_vcpu_normal(cpu);
             break;
         }
     }
 }

 static void s390_cpu_disas_set_info(CPUState *cpu, disassemble_info *info)
 {
     info->mach = bfd_mach_s390_64;
     info->cap_arch = CS_ARCH_SYSZ;
     info->cap_insn_unit = 2;
     info->cap_insn_split = 6;
 }

 static void s390_cpu_realizefn(DeviceState *dev, Error **errp)
 {
     CPUState *cs = CPU(dev);
     S390CPUClass *scc = S390_CPU_GET_CLASS(dev);
     Error *err = NULL;

     /* the model has to be realized before qemu_init_vcpu() due to kvm */
     s390_realize_cpu_model(cs, &err);
     if (err) {
         goto out;
     }

 #if !defined(CONFIG_USER_ONLY)
     if (!s390_cpu_realize_sysemu(dev, &err)) {
         goto out;
     }
 #endif

     cpu_exec_realizefn(cs, &err);
     if (err != NULL) {
         goto out;
     }

 #if !defined(CONFIG_USER_ONLY)
     qemu_register_reset(s390_cpu_machine_reset_cb, S390_CPU(dev));
 #endif
     s390_cpu_gdb_init(cs);
     qemu_init_vcpu(cs);

     /*
      * KVM requires the initial CPU reset ioctl to be executed on the target
      * CPU thread. CPU hotplug under single-threaded TCG will not work with
      * run_on_cpu(), as run_on_cpu() will not work properly if called while
      * the main thread is already running but the CPU hasn't been realized.
      */
     if (kvm_enabled()) {
         run_on_cpu(cs, s390_do_cpu_full_reset, RUN_ON_CPU_NULL);
     } else {
         cpu_reset(cs);
     }

     scc->parent_realize(dev, &err);
 out:
     error_propagate(errp, err);
 }

 static void s390_cpu_initfn(Object *obj)
 {
     CPUState *cs = CPU(obj);

     cs->exception_index = EXCP_HLT;

 #if !defined(CONFIG_USER_ONLY)
     s390_cpu_init_sysemu(obj);
 #endif
 }

 static const gchar *s390_gdb_arch_name(CPUState *cs)
 {
     return "s390:64-bit";
 }

 static Property s390x_cpu_properties[] = {
 #if !defined(CONFIG_USER_ONLY)
     DEFINE_PROP_UINT32("core-id", S390CPU, env.core_id, 0),
     DEFINE_PROP_INT32("socket-id", S390CPU, env.socket_id, -1),
     DEFINE_PROP_INT32("book-id", S390CPU, env.book_id, -1),
     DEFINE_PROP_INT32("drawer-id", S390CPU, env.drawer_id, -1),
     DEFINE_PROP_BOOL("dedicated", S390CPU, env.dedicated, false),
     DEFINE_PROP_CPUS390ENTITLEMENT("entitlement", S390CPU, env.entitlement,
                                    S390_CPU_ENTITLEMENT_AUTO),
 #endif
     DEFINE_PROP_END_OF_LIST()
 };

 #ifdef CONFIG_TCG
 #include "hw/core/tcg-cpu-ops.h"

 void cpu_get_tb_cpu_state(CPUS390XState *env, vaddr *pc,
                           uint64_t *cs_base, uint32_t *pflags)
 {
     uint32_t flags;

     if (env->psw.addr & 1) {
         /*
          * Instructions must be at even addresses.
          * This needs to be checked before address translation.
          */
         env->int_pgm_ilen = 2; /* see s390_cpu_tlb_fill() */
         tcg_s390_program_interrupt(env, PGM_SPECIFICATION, 0);
     }

     *pc = env->psw.addr;
     *cs_base = env->ex_value;

     flags = (env->psw.mask >> FLAG_MASK_PSW_SHIFT) & FLAG_MASK_PSW;
     if (env->psw.mask & PSW_MASK_PER) {
         flags |= env->cregs[9] & (FLAG_MASK_PER_BRANCH |
                                   FLAG_MASK_PER_IFETCH |
                                   FLAG_MASK_PER_IFETCH_NULLIFY);
         if ((env->cregs[9] & PER_CR9_EVENT_STORE) &&
             (env->cregs[9] & PER_CR9_EVENT_STORE_REAL)) {
             flags |= FLAG_MASK_PER_STORE_REAL;
         }
     }
     if (env->cregs[0] & CR0_AFP) {
         flags |= FLAG_MASK_AFP;
     }
     if (env->cregs[0] & CR0_VECTOR) {
         flags |= FLAG_MASK_VECTOR;
     }
     *pflags = flags;
 }

 static const TCGCPUOps s390_tcg_ops = {
     .initialize = s390x_translate_init,
     .restore_state_to_opc = s390x_restore_state_to_opc,

 #ifdef CONFIG_USER_ONLY
     .record_sigsegv = s390_cpu_record_sigsegv,
     .record_sigbus = s390_cpu_record_sigbus,
 #else
     .tlb_fill = s390_cpu_tlb_fill,
     .cpu_exec_interrupt = s390_cpu_exec_interrupt,
     .cpu_exec_halt = s390_cpu_has_work,
     .do_interrupt = s390_cpu_do_interrupt,
     .debug_excp_handler = s390x_cpu_debug_excp_handler,
     .do_unaligned_access = s390x_cpu_do_unaligned_access,
 #endif /* !CONFIG_USER_ONLY */
 };
 #endif /* CONFIG_TCG */

 static void s390_cpu_class_init(ObjectClass *oc, void *data)
 {
     S390CPUClass *scc = S390_CPU_CLASS(oc);
     CPUClass *cc = CPU_CLASS(scc);
     DeviceClass *dc = DEVICE_CLASS(oc);
     ResettableClass *rc = RESETTABLE_CLASS(oc);

     device_class_set_parent_realize(dc, s390_cpu_realizefn,
                                     &scc->parent_realize);
     device_class_set_props(dc, s390x_cpu_properties);
     dc->user_creatable = true;

     resettable_class_set_parent_phases(rc, NULL, s390_cpu_reset_hold, NULL,
                                        &scc->parent_phases);

     cc->class_by_name = s390_cpu_class_by_name,
     cc->has_work = s390_cpu_has_work;
     cc->mmu_index = s390x_cpu_mmu_index;
     cc->dump_state = s390_cpu_dump_state;
     cc->query_cpu_fast = s390_query_cpu_fast;
     cc->set_pc = s390_cpu_set_pc;
     cc->get_pc = s390_cpu_get_pc;
     cc->gdb_read_register = s390_cpu_gdb_read_register;
     cc->gdb_write_register = s390_cpu_gdb_write_register;
 #ifndef CONFIG_USER_ONLY
     s390_cpu_class_init_sysemu(cc);
 #endif
     cc->disas_set_info = s390_cpu_disas_set_info;
     cc->gdb_core_xml_file = "s390x-core64.xml";
     cc->gdb_arch_name = s390_gdb_arch_name;

     s390_cpu_model_class_register_props(oc);

 #ifdef CONFIG_TCG
     cc->tcg_ops = &s390_tcg_ops;
 #endif /* CONFIG_TCG */
 }

 static const TypeInfo s390_cpu_type_info = {
     .name = TYPE_S390_CPU,
     .parent = TYPE_CPU,
     .instance_size = sizeof(S390CPU),
     .instance_align = __alignof__(S390CPU),
     .instance_init = s390_cpu_initfn,

 #ifndef CONFIG_USER_ONLY
     .instance_finalize = s390_cpu_finalize,
 #endif /* !CONFIG_USER_ONLY */

     .abstract = true,
     .class_size = sizeof(S390CPUClass),
     .class_init = s390_cpu_class_init,
 };

 static void s390_cpu_register_types(void)
 {
     type_register_static(&s390_cpu_type_info);
 }

 type_init(s390_cpu_register_types)
	/*
	* QEMU S/390 CPU
	*
	* Copyright (c) 2009 Ulrich Hecht
	* Copyright (c) 2011 Alexander Graf
	* Copyright (c) 2012 SUSE LINUX Products GmbH
	* Copyright (c) 2012 IBM Corp.
	*
	* This program is free software; you can redistribute it and/or modify
	* it under the terms of the GNU General Public License as published by
	* the Free Software Foundation; either version 2 of the License, or
	* (at your option) any later version.
	*
	* This program 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
	* General Public License for more details.
	*
	* You should have received a copy of the GNU General Public License
	* along with this program; if not, see <http://www.gnu.org/licenses/>.
	*/

	#include "qemu/osdep.h"
	#include "qapi/error.h"
	#include "cpu.h"
	#include "s390x-internal.h"
	#include "kvm/kvm_s390x.h"
	#include "sysemu/kvm.h"
	#include "qemu/module.h"
	#include "trace.h"
	#include "qapi/qapi-types-machine.h"
	#include "sysemu/hw_accel.h"
	#include "hw/qdev-properties.h"
	#include "hw/qdev-properties-system.h"
	#include "hw/resettable.h"
	#include "fpu/softfloat-helpers.h"
	#include "disas/capstone.h"
	#include "sysemu/tcg.h"
	#ifndef CONFIG_USER_ONLY
	#include "sysemu/reset.h"
	#endif
	#include "hw/s390x/cpu-topology.h"

	#define CR0_RESET 0xE0UL
	#define CR14_RESET 0xC2000000UL;

	#ifndef CONFIG_USER_ONLY
	static bool is_early_exception_psw(uint64_t mask, uint64_t addr)
	{
	if (mask & PSW_MASK_RESERVED) {
	return true;
	}

	switch (mask & (PSW_MASK_32 \| PSW_MASK_64)) {
	case 0:
	return addr & ~0xffffffULL;
	case PSW_MASK_32:
	return addr & ~0x7fffffffULL;
	case PSW_MASK_32 \| PSW_MASK_64:
	return false;
	default: /* PSW_MASK_64 */
	return true;
	}
	}
	#endif

	void s390_cpu_set_psw(CPUS390XState *env, uint64_t mask, uint64_t addr)
	{
	#ifndef CONFIG_USER_ONLY
	uint64_t old_mask = env->psw.mask;
	#endif

	env->psw.addr = addr;
	env->psw.mask = mask;

	/* KVM will handle all WAITs and trigger a WAIT exit on disabled_wait */
	if (!tcg_enabled()) {
	return;
	}
	env->cc_op = (mask >> 44) & 3;

	#ifndef CONFIG_USER_ONLY
	if (is_early_exception_psw(mask, addr)) {
	env->int_pgm_ilen = 0;
	trigger_pgm_exception(env, PGM_SPECIFICATION);
	return;
	}

	if ((old_mask ^ mask) & PSW_MASK_PER) {
	s390_cpu_recompute_watchpoints(env_cpu(env));
	}

	if (mask & PSW_MASK_WAIT) {
	s390_handle_wait(env_archcpu(env));
	}
	#endif
	}

	uint64_t s390_cpu_get_psw_mask(CPUS390XState *env)
	{
	uint64_t r = env->psw.mask;

	if (tcg_enabled()) {
	uint64_t cc = calc_cc(env, env->cc_op, env->cc_src,
	env->cc_dst, env->cc_vr);

	assert(cc <= 3);
	r &= ~PSW_MASK_CC;
	r \|= cc << 44;
	}

	return r;
	}

	static void s390_cpu_set_pc(CPUState *cs, vaddr value)
	{
	S390CPU *cpu = S390_CPU(cs);

	cpu->env.psw.addr = value;
	}

	static vaddr s390_cpu_get_pc(CPUState *cs)
	{
	S390CPU *cpu = S390_CPU(cs);

	return cpu->env.psw.addr;
	}

	static bool s390_cpu_has_work(CPUState *cs)
	{
	S390CPU *cpu = S390_CPU(cs);

	/* STOPPED cpus can never wake up */
	if (s390_cpu_get_state(cpu) != S390_CPU_STATE_LOAD &&
	s390_cpu_get_state(cpu) != S390_CPU_STATE_OPERATING) {
	return false;
	}

	if (!(cs->interrupt_request & CPU_INTERRUPT_HARD)) {
	return false;
	}

	return s390_cpu_has_int(cpu);
	}

	static int s390x_cpu_mmu_index(CPUState *cs, bool ifetch)
	{
	return s390x_env_mmu_index(cpu_env(cs), ifetch);
	}

	static void s390_query_cpu_fast(CPUState cpu, CpuInfoFast value)
	{
	S390CPU *s390_cpu = S390_CPU(cpu);

	value->u.s390x.cpu_state = s390_cpu->env.cpu_state;
	#if !defined(CONFIG_USER_ONLY)
	if (s390_has_topology()) {
	value->u.s390x.has_dedicated = true;
	value->u.s390x.dedicated = s390_cpu->env.dedicated;
	value->u.s390x.has_entitlement = true;
	value->u.s390x.entitlement = s390_cpu->env.entitlement;
	}
	#endif
	}

	/* S390CPUClass Resettable reset_hold phase method */
	static void s390_cpu_reset_hold(Object *obj, ResetType type)
	{
	S390CPU *cpu = S390_CPU(obj);
	S390CPUClass *scc = S390_CPU_GET_CLASS(cpu);
	CPUS390XState *env = &cpu->env;

	if (scc->parent_phases.hold) {
	scc->parent_phases.hold(obj, type);
	}
	cpu->env.sigp_order = 0;
	s390_cpu_set_state(S390_CPU_STATE_STOPPED, cpu);

	switch (type) {
	default:
	/* RESET_TYPE_COLD: power on or "clear" reset */
	memset(env, 0, offsetof(CPUS390XState, start_initial_reset_fields));
	/* fall through */
	case RESET_TYPE_S390_CPU_INITIAL:
	/* initial reset does not clear everything! */
	memset(&env->start_initial_reset_fields, 0,
	offsetof(CPUS390XState, start_normal_reset_fields) -
	offsetof(CPUS390XState, start_initial_reset_fields));

	/* architectured initial value for Breaking-Event-Address register */
	env->gbea = 1;

	/* architectured initial values for CR 0 and 14 */
	env->cregs[0] = CR0_RESET;
	env->cregs[14] = CR14_RESET;

	#if defined(CONFIG_USER_ONLY)
	/* user mode should always be allowed to use the full FPU */
	env->cregs[0] \|= CR0_AFP;
	if (s390_has_feat(S390_FEAT_VECTOR)) {
	env->cregs[0] \|= CR0_VECTOR;
	}
	#endif

	/* tininess for underflow is detected before rounding */
	set_float_detect_tininess(float_tininess_before_rounding,
	&env->fpu_status);
	set_float_2nan_prop_rule(float_2nan_prop_s_ab, &env->fpu_status);
	/* fall through */
	case RESET_TYPE_S390_CPU_NORMAL:
	env->psw.mask &= ~PSW_MASK_RI;
	memset(&env->start_normal_reset_fields, 0,
	offsetof(CPUS390XState, end_reset_fields) -
	offsetof(CPUS390XState, start_normal_reset_fields));

	env->pfault_token = -1UL;
	env->bpbc = false;
	break;
	}

	/* Reset state inside the kernel that we cannot access yet from QEMU. */
	if (kvm_enabled()) {
	switch (type) {
	default:
	kvm_s390_reset_vcpu_clear(cpu);
	break;
	case RESET_TYPE_S390_CPU_INITIAL:
	kvm_s390_reset_vcpu_initial(cpu);
	break;
	case RESET_TYPE_S390_CPU_NORMAL:
	kvm_s390_reset_vcpu_normal(cpu);
	break;
	}
	}
	}

	static void s390_cpu_disas_set_info(CPUState cpu, disassemble_info info)
	{
	info->mach = bfd_mach_s390_64;
	info->cap_arch = CS_ARCH_SYSZ;
	info->cap_insn_unit = 2;
	info->cap_insn_split = 6;
	}

	static void s390_cpu_realizefn(DeviceState dev, Error *errp)
	{
	CPUState *cs = CPU(dev);
	S390CPUClass *scc = S390_CPU_GET_CLASS(dev);
	Error *err = NULL;

	/* the model has to be realized before qemu_init_vcpu() due to kvm */
	s390_realize_cpu_model(cs, &err);
	if (err) {
	goto out;
	}

	#if !defined(CONFIG_USER_ONLY)
	if (!s390_cpu_realize_sysemu(dev, &err)) {
	goto out;
	}
	#endif

	cpu_exec_realizefn(cs, &err);
	if (err != NULL) {
	goto out;
	}

	#if !defined(CONFIG_USER_ONLY)
	qemu_register_reset(s390_cpu_machine_reset_cb, S390_CPU(dev));
	#endif
	s390_cpu_gdb_init(cs);
	qemu_init_vcpu(cs);

	/*
	* KVM requires the initial CPU reset ioctl to be executed on the target
	* CPU thread. CPU hotplug under single-threaded TCG will not work with
	* run_on_cpu(), as run_on_cpu() will not work properly if called while
	* the main thread is already running but the CPU hasn't been realized.
	*/
	if (kvm_enabled()) {
	run_on_cpu(cs, s390_do_cpu_full_reset, RUN_ON_CPU_NULL);
	} else {
	cpu_reset(cs);
	}

	scc->parent_realize(dev, &err);
	out:
	error_propagate(errp, err);
	}

	static void s390_cpu_initfn(Object *obj)
	{
	CPUState *cs = CPU(obj);

	cs->exception_index = EXCP_HLT;

	#if !defined(CONFIG_USER_ONLY)
	s390_cpu_init_sysemu(obj);
	#endif
	}

	static const gchar s390_gdb_arch_name(CPUState cs)
	{
	return "s390:64-bit";
	}

	static Property s390x_cpu_properties[] = {
	#if !defined(CONFIG_USER_ONLY)
	DEFINE_PROP_UINT32("core-id", S390CPU, env.core_id, 0),
	DEFINE_PROP_INT32("socket-id", S390CPU, env.socket_id, -1),
	DEFINE_PROP_INT32("book-id", S390CPU, env.book_id, -1),
	DEFINE_PROP_INT32("drawer-id", S390CPU, env.drawer_id, -1),
	DEFINE_PROP_BOOL("dedicated", S390CPU, env.dedicated, false),
	DEFINE_PROP_CPUS390ENTITLEMENT("entitlement", S390CPU, env.entitlement,
	S390_CPU_ENTITLEMENT_AUTO),
	#endif
	DEFINE_PROP_END_OF_LIST()
	};

	#ifdef CONFIG_TCG
	#include "hw/core/tcg-cpu-ops.h"

	void cpu_get_tb_cpu_state(CPUS390XState env, vaddr pc,
	uint64_t cs_base, uint32_t pflags)
	{
	uint32_t flags;

	if (env->psw.addr & 1) {
	/*
	* Instructions must be at even addresses.
	* This needs to be checked before address translation.
	*/
	env->int_pgm_ilen = 2; /* see s390_cpu_tlb_fill() */
	tcg_s390_program_interrupt(env, PGM_SPECIFICATION, 0);
	}

	*pc = env->psw.addr;
	*cs_base = env->ex_value;

	flags = (env->psw.mask >> FLAG_MASK_PSW_SHIFT) & FLAG_MASK_PSW;
	if (env->psw.mask & PSW_MASK_PER) {
	flags \|= env->cregs[9] & (FLAG_MASK_PER_BRANCH \|
	FLAG_MASK_PER_IFETCH \|
	FLAG_MASK_PER_IFETCH_NULLIFY);
	if ((env->cregs[9] & PER_CR9_EVENT_STORE) &&
	(env->cregs[9] & PER_CR9_EVENT_STORE_REAL)) {
	flags \|= FLAG_MASK_PER_STORE_REAL;
	}
	}
	if (env->cregs[0] & CR0_AFP) {
	flags \|= FLAG_MASK_AFP;
	}
	if (env->cregs[0] & CR0_VECTOR) {
	flags \|= FLAG_MASK_VECTOR;
	}
	*pflags = flags;
	}

	static const TCGCPUOps s390_tcg_ops = {
	.initialize = s390x_translate_init,
	.restore_state_to_opc = s390x_restore_state_to_opc,

	#ifdef CONFIG_USER_ONLY
	.record_sigsegv = s390_cpu_record_sigsegv,
	.record_sigbus = s390_cpu_record_sigbus,
	#else
	.tlb_fill = s390_cpu_tlb_fill,
	.cpu_exec_interrupt = s390_cpu_exec_interrupt,
	.cpu_exec_halt = s390_cpu_has_work,
	.do_interrupt = s390_cpu_do_interrupt,
	.debug_excp_handler = s390x_cpu_debug_excp_handler,
	.do_unaligned_access = s390x_cpu_do_unaligned_access,
	#endif /* !CONFIG_USER_ONLY */
	};
	#endif /* CONFIG_TCG */

	static void s390_cpu_class_init(ObjectClass oc, void data)
	{
	S390CPUClass *scc = S390_CPU_CLASS(oc);
	CPUClass *cc = CPU_CLASS(scc);
	DeviceClass *dc = DEVICE_CLASS(oc);
	ResettableClass *rc = RESETTABLE_CLASS(oc);

	device_class_set_parent_realize(dc, s390_cpu_realizefn,
	&scc->parent_realize);
	device_class_set_props(dc, s390x_cpu_properties);
	dc->user_creatable = true;

	resettable_class_set_parent_phases(rc, NULL, s390_cpu_reset_hold, NULL,
	&scc->parent_phases);

	cc->class_by_name = s390_cpu_class_by_name,
	cc->has_work = s390_cpu_has_work;
	cc->mmu_index = s390x_cpu_mmu_index;
	cc->dump_state = s390_cpu_dump_state;
	cc->query_cpu_fast = s390_query_cpu_fast;
	cc->set_pc = s390_cpu_set_pc;
	cc->get_pc = s390_cpu_get_pc;
	cc->gdb_read_register = s390_cpu_gdb_read_register;
	cc->gdb_write_register = s390_cpu_gdb_write_register;
	#ifndef CONFIG_USER_ONLY
	s390_cpu_class_init_sysemu(cc);
	#endif
	cc->disas_set_info = s390_cpu_disas_set_info;
	cc->gdb_core_xml_file = "s390x-core64.xml";
	cc->gdb_arch_name = s390_gdb_arch_name;

	s390_cpu_model_class_register_props(oc);

	#ifdef CONFIG_TCG
	cc->tcg_ops = &s390_tcg_ops;
	#endif /* CONFIG_TCG */
	}

	static const TypeInfo s390_cpu_type_info = {
	.name = TYPE_S390_CPU,
	.parent = TYPE_CPU,
	.instance_size = sizeof(S390CPU),
	.instance_align = __alignof__(S390CPU),
	.instance_init = s390_cpu_initfn,

	#ifndef CONFIG_USER_ONLY
	.instance_finalize = s390_cpu_finalize,
	#endif /* !CONFIG_USER_ONLY */

	.abstract = true,
	.class_size = sizeof(S390CPUClass),
	.class_init = s390_cpu_class_init,
	};

	static void s390_cpu_register_types(void)
	{
	type_register_static(&s390_cpu_type_info);
	}

	type_init(s390_cpu_register_types)