[qemu.git] / target-s390x / cpu.c

/*
 * 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 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 2.1 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/lgpl-2.1.html>
 * Contributions after 2012-12-11 are licensed under the terms of the
 * GNU GPL, version 2 or (at your option) any later version.
 */

#include "qemu/osdep.h"
#include "qapi/error.h"
#include "cpu.h"
#include "qemu-common.h"
#include "qemu/cutils.h"
#include "qemu/timer.h"
#include "qemu/error-report.h"
#include "trace.h"
#include "qapi/visitor.h"
#include "migration/vmstate.h"
#include "exec/exec-all.h"
#ifndef CONFIG_USER_ONLY
#include "hw/hw.h"
#include "sysemu/arch_init.h"
#include "sysemu/sysemu.h"
#include "hw/s390x/sclp.h"
#endif

#define CR0_RESET       0xE0UL
#define CR14_RESET      0xC2000000UL;

/* generate CPU information for cpu -? */
void s390_cpu_list(FILE *f, fprintf_function cpu_fprintf)
{
#ifdef CONFIG_KVM
    (*cpu_fprintf)(f, "s390 %16s\n", "host");
#endif
}

#ifndef CONFIG_USER_ONLY
CpuDefinitionInfoList *arch_query_cpu_definitions(Error **errp)
{
    CpuDefinitionInfoList *entry;
    CpuDefinitionInfo *info;

    info = g_malloc0(sizeof(*info));
    info->name = g_strdup("host");

    entry = g_malloc0(sizeof(*entry));
    entry->value = info;

    return entry;
}
#endif

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

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

static bool s390_cpu_has_work(CPUState *cs)
{
    S390CPU *cpu = S390_CPU(cs);
    CPUS390XState *env = &cpu->env;

    return (cs->interrupt_request & CPU_INTERRUPT_HARD) &&
           (env->psw.mask & PSW_MASK_EXT);
}

#if !defined(CONFIG_USER_ONLY)
/* S390CPUClass::load_normal() */
static void s390_cpu_load_normal(CPUState *s)
{
    S390CPU *cpu = S390_CPU(s);
    cpu->env.psw.addr = ldl_phys(s->as, 4) & PSW_MASK_ESA_ADDR;
    cpu->env.psw.mask = PSW_MASK_32 | PSW_MASK_64;
    s390_cpu_set_state(CPU_STATE_OPERATING, cpu);
}
#endif

/* S390CPUClass::cpu_reset() */
static void s390_cpu_reset(CPUState *s)
{
    S390CPU *cpu = S390_CPU(s);
    S390CPUClass *scc = S390_CPU_GET_CLASS(cpu);
    CPUS390XState *env = &cpu->env;

    env->pfault_token = -1UL;
    scc->parent_reset(s);
    cpu->env.sigp_order = 0;
    s390_cpu_set_state(CPU_STATE_STOPPED, cpu);
    tlb_flush(s, 1);
}

/* S390CPUClass::initial_reset() */
static void s390_cpu_initial_reset(CPUState *s)
{
    S390CPU *cpu = S390_CPU(s);
    CPUS390XState *env = &cpu->env;
    int i;

    s390_cpu_reset(s);
    /* initial reset does not touch regs,fregs and aregs */
    memset(&env->fpc, 0, offsetof(CPUS390XState, cpu_num) -
                         offsetof(CPUS390XState, fpc));

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

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

    env->pfault_token = -1UL;
    env->ext_index = -1;
    for (i = 0; i < ARRAY_SIZE(env->io_index); i++) {
        env->io_index[i] = -1;
    }

    /* tininess for underflow is detected before rounding */
    set_float_detect_tininess(float_tininess_before_rounding,
                              &env->fpu_status);

    /* Reset state inside the kernel that we cannot access yet from QEMU. */
    if (kvm_enabled()) {
        kvm_s390_reset_vcpu(cpu);
    }
    tlb_flush(s, 1);
}

/* CPUClass:reset() */
static void s390_cpu_full_reset(CPUState *s)
{
    S390CPU *cpu = S390_CPU(s);
    S390CPUClass *scc = S390_CPU_GET_CLASS(cpu);
    CPUS390XState *env = &cpu->env;
    int i;

    scc->parent_reset(s);
    cpu->env.sigp_order = 0;
    s390_cpu_set_state(CPU_STATE_STOPPED, cpu);

    memset(env, 0, offsetof(CPUS390XState, cpu_num));

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

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

    env->pfault_token = -1UL;
    env->ext_index = -1;
    for (i = 0; i < ARRAY_SIZE(env->io_index); i++) {
        env->io_index[i] = -1;
    }

    /* tininess for underflow is detected before rounding */
    set_float_detect_tininess(float_tininess_before_rounding,
                              &env->fpu_status);

    /* Reset state inside the kernel that we cannot access yet from QEMU. */
    if (kvm_enabled()) {
        kvm_s390_reset_vcpu(cpu);
    }
    tlb_flush(s, 1);
}

#if !defined(CONFIG_USER_ONLY)
static void s390_cpu_machine_reset_cb(void *opaque)
{
    S390CPU *cpu = opaque;

    run_on_cpu(CPU(cpu), s390_do_cpu_full_reset, CPU(cpu));
}
#endif

static void s390_cpu_disas_set_info(CPUState *cpu, disassemble_info *info)
{
    info->mach = bfd_mach_s390_64;
    info->print_insn = print_insn_s390;
}

static void s390_cpu_realizefn(DeviceState *dev, Error **errp)
{
    CPUState *cs = CPU(dev);
    S390CPUClass *scc = S390_CPU_GET_CLASS(dev);
    S390CPU *cpu = S390_CPU(dev);
    CPUS390XState *env = &cpu->env;
    Error *err = NULL;

#if !defined(CONFIG_USER_ONLY)
    if (cpu->id >= max_cpus) {
        error_setg(&err, "Unable to add CPU: %" PRIi64
                   ", max allowed: %d", cpu->id, max_cpus - 1);
        goto out;
    }
#endif
    if (cpu_exists(cpu->id)) {
        error_setg(&err, "Unable to add CPU: %" PRIi64
                   ", it already exists", cpu->id);
        goto out;
    }
    if (cpu->id != scc->next_cpu_id) {
        error_setg(&err, "Unable to add CPU: %" PRIi64
                   ", The next available id is %" PRIi64, cpu->id,
                   scc->next_cpu_id);
        goto out;
    }

    cpu_exec_init(cs, &err);
    if (err != NULL) {
        goto out;
    }
    scc->next_cpu_id++;

#if !defined(CONFIG_USER_ONLY)
    qemu_register_reset(s390_cpu_machine_reset_cb, cpu);
#endif
    env->cpu_num = cpu->id;
    s390_cpu_gdb_init(cs);
    qemu_init_vcpu(cs);
#if !defined(CONFIG_USER_ONLY)
    run_on_cpu(cs, s390_do_cpu_full_reset, cs);
#else
    cpu_reset(cs);
#endif

    scc->parent_realize(dev, &err);

#if !defined(CONFIG_USER_ONLY)
    if (dev->hotplugged) {
        raise_irq_cpu_hotplug();
    }
#endif

out:
    error_propagate(errp, err);
}

static void s390x_cpu_get_id(Object *obj, Visitor *v, const char *name,
                             void *opaque, Error **errp)
{
    S390CPU *cpu = S390_CPU(obj);
    int64_t value = cpu->id;

    visit_type_int(v, name, &value, errp);
}

static void s390x_cpu_set_id(Object *obj, Visitor *v, const char *name,
                             void *opaque, Error **errp)
{
    S390CPU *cpu = S390_CPU(obj);
    DeviceState *dev = DEVICE(obj);
    const int64_t min = 0;
    const int64_t max = UINT32_MAX;
    Error *err = 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, name, &value, &err);
    if (err) {
        error_propagate(errp, err);
        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;
    }
    cpu->id = value;
}

static void s390_cpu_initfn(Object *obj)
{
    CPUState *cs = CPU(obj);
    S390CPU *cpu = S390_CPU(obj);
    CPUS390XState *env = &cpu->env;
    static bool inited;
#if !defined(CONFIG_USER_ONLY)
    struct tm tm;
#endif

    cs->env_ptr = env;
    cs->halted = 1;
    cs->exception_index = EXCP_HLT;
    object_property_add(OBJECT(cpu), "id", "int64_t", s390x_cpu_get_id,
                        s390x_cpu_set_id, NULL, NULL, NULL);
#if !defined(CONFIG_USER_ONLY)
    qemu_get_timedate(&tm, 0);
    env->tod_offset = TOD_UNIX_EPOCH +
                      (time2tod(mktimegm(&tm)) * 1000000000ULL);
    env->tod_basetime = 0;
    env->tod_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, s390x_tod_timer, cpu);
    env->cpu_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, s390x_cpu_timer, cpu);
    s390_cpu_set_state(CPU_STATE_STOPPED, cpu);
#endif

    if (tcg_enabled() && !inited) {
        inited = true;
        s390x_translate_init();
    }
}

static void s390_cpu_finalize(Object *obj)
{
#if !defined(CONFIG_USER_ONLY)
    S390CPU *cpu = S390_CPU(obj);

    qemu_unregister_reset(s390_cpu_machine_reset_cb, cpu);
    g_free(cpu->irqstate);
#endif
}

#if !defined(CONFIG_USER_ONLY)
static bool disabled_wait(CPUState *cpu)
{
    return cpu->halted && !(S390_CPU(cpu)->env.psw.mask &
                            (PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK));
}

static unsigned s390_count_running_cpus(void)
{
    CPUState *cpu;
    int nr_running = 0;

    CPU_FOREACH(cpu) {
        uint8_t state = S390_CPU(cpu)->env.cpu_state;
        if (state == CPU_STATE_OPERATING ||
            state == CPU_STATE_LOAD) {
            if (!disabled_wait(cpu)) {
                nr_running++;
            }
        }
    }

    return nr_running;
}

unsigned int s390_cpu_halt(S390CPU *cpu)
{
    CPUState *cs = CPU(cpu);
    trace_cpu_halt(cs->cpu_index);

    if (!cs->halted) {
        cs->halted = 1;
        cs->exception_index = EXCP_HLT;
    }

    return s390_count_running_cpus();
}

void s390_cpu_unhalt(S390CPU *cpu)
{
    CPUState *cs = CPU(cpu);
    trace_cpu_unhalt(cs->cpu_index);

    if (cs->halted) {
        cs->halted = 0;
        cs->exception_index = -1;
    }
}

unsigned int s390_cpu_set_state(uint8_t cpu_state, S390CPU *cpu)
 {
    trace_cpu_set_state(CPU(cpu)->cpu_index, cpu_state);

    switch (cpu_state) {
    case CPU_STATE_STOPPED:
    case CPU_STATE_CHECK_STOP:
        /* halt the cpu for common infrastructure */
        s390_cpu_halt(cpu);
        break;
    case CPU_STATE_OPERATING:
    case CPU_STATE_LOAD:
        /* unhalt the cpu for common infrastructure */
        s390_cpu_unhalt(cpu);
        break;
    default:
        error_report("Requested CPU state is not a valid S390 CPU state: %u",
                     cpu_state);
        exit(1);
    }
    if (kvm_enabled() && cpu->env.cpu_state != cpu_state) {
        kvm_s390_set_cpu_state(cpu, cpu_state);
    }
    cpu->env.cpu_state = cpu_state;

    return s390_count_running_cpus();
}
#endif

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

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);

    scc->next_cpu_id = 0;
    scc->parent_realize = dc->realize;
    dc->realize = s390_cpu_realizefn;

    scc->parent_reset = cc->reset;
#if !defined(CONFIG_USER_ONLY)
    scc->load_normal = s390_cpu_load_normal;
#endif
    scc->cpu_reset = s390_cpu_reset;
    scc->initial_cpu_reset = s390_cpu_initial_reset;
    cc->reset = s390_cpu_full_reset;
    cc->has_work = s390_cpu_has_work;
    cc->do_interrupt = s390_cpu_do_interrupt;
    cc->dump_state = s390_cpu_dump_state;
    cc->set_pc = s390_cpu_set_pc;
    cc->gdb_read_register = s390_cpu_gdb_read_register;
    cc->gdb_write_register = s390_cpu_gdb_write_register;
#ifdef CONFIG_USER_ONLY
    cc->handle_mmu_fault = s390_cpu_handle_mmu_fault;
#else
    cc->get_phys_page_debug = s390_cpu_get_phys_page_debug;
    cc->vmsd = &vmstate_s390_cpu;
    cc->write_elf64_note = s390_cpu_write_elf64_note;
    cc->cpu_exec_interrupt = s390_cpu_exec_interrupt;
    cc->debug_excp_handler = s390x_cpu_debug_excp_handler;
#endif
    cc->disas_set_info = s390_cpu_disas_set_info;

    cc->gdb_num_core_regs = S390_NUM_CORE_REGS;
    cc->gdb_core_xml_file = "s390x-core64.xml";
    cc->gdb_arch_name = s390_gdb_arch_name;

    /*
     * Reason: s390_cpu_realizefn() calls cpu_exec_init(), which saves
     * the object in cpus -> dangling pointer after final
     * object_unref().
     */
    dc->cannot_destroy_with_object_finalize_yet = true;
}

static const TypeInfo s390_cpu_type_info = {
    .name = TYPE_S390_CPU,
    .parent = TYPE_CPU,
    .instance_size = sizeof(S390CPU),
    .instance_init = s390_cpu_initfn,
    .instance_finalize = s390_cpu_finalize,
    .abstract = false,
    .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)
Commit	Line	Data
29e4bcb2 AF	1	/*
	2	* QEMU S/390 CPU
	3	*
1ac1a749 AF	4	* Copyright (c) 2009 Ulrich Hecht
1ac1a749 AF	5	* Copyright (c) 2011 Alexander Graf
29e4bcb2	6	* Copyright (c) 2012 SUSE LINUX Products GmbH
70bada03	7	* Copyright (c) 2012 IBM Corp.
29e4bcb2 AF	8	*
	9	* This library is free software; you can redistribute it and/or
	10	* modify it under the terms of the GNU Lesser General Public
	11	* License as published by the Free Software Foundation; either
	12	* version 2.1 of the License, or (at your option) any later version.
	13	*
	14	* This library is distributed in the hope that it will be useful,
	15	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	16	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	17	* Lesser General Public License for more details.
	18	*
	19	* You should have received a copy of the GNU Lesser General Public
	20	* License along with this library; if not, see
	21	* <http://www.gnu.org/licenses/lgpl-2.1.html>
70bada03 JF	22	* Contributions after 2012-12-11 are licensed under the terms of the
70bada03 JF	23	* GNU GPL, version 2 or (at your option) any later version.
29e4bcb2 AF	24	*/
29e4bcb2 AF	25
9615495a	26	#include "qemu/osdep.h"
da34e65c	27	#include "qapi/error.h"
564b863d	28	#include "cpu.h"
29e4bcb2	29	#include "qemu-common.h"
f348b6d1	30	#include "qemu/cutils.h"
1de7afc9	31	#include "qemu/timer.h"
eb24f7c6	32	#include "qemu/error-report.h"
eb24f7c6	33	#include "trace.h"
96b1a8bb	34	#include "qapi/visitor.h"
741da0d3	35	#include "migration/vmstate.h"
63c91552	36	#include "exec/exec-all.h"
c7396bbb	37	#ifndef CONFIG_USER_ONLY
741da0d3	38	#include "hw/hw.h"
904e5fd5	39	#include "sysemu/arch_init.h"
96b1a8bb	40	#include "sysemu/sysemu.h"
a006b67f	41	#include "hw/s390x/sclp.h"
904e5fd5 VM	42	#endif
904e5fd5 VM	43
70bada03 JF	44	#define CR0_RESET 0xE0UL
	45	#define CR14_RESET 0xC2000000UL;
	46
904e5fd5 VM	47	/* generate CPU information for cpu -? */
	48	void s390_cpu_list(FILE *f, fprintf_function cpu_fprintf)
	49	{
	50	#ifdef CONFIG_KVM
	51	(*cpu_fprintf)(f, "s390 %16s\n", "host");
	52	#endif
	53	}
29e4bcb2	54
904e5fd5 VM	55	#ifndef CONFIG_USER_ONLY
	56	CpuDefinitionInfoList arch_query_cpu_definitions(Error *errp)
	57	{
	58	CpuDefinitionInfoList *entry;
	59	CpuDefinitionInfo *info;
	60
	61	info = g_malloc0(sizeof(*info));
	62	info->name = g_strdup("host");
	63
	64	entry = g_malloc0(sizeof(*entry));
	65	entry->value = info;
	66
	67	return entry;
	68	}
	69	#endif
29e4bcb2	70
f45748f1 AF	71	static void s390_cpu_set_pc(CPUState *cs, vaddr value)
	72	{
	73	S390CPU *cpu = S390_CPU(cs);
	74
	75	cpu->env.psw.addr = value;
	76	}
	77
8c2e1b00 AF	78	static bool s390_cpu_has_work(CPUState *cs)
	79	{
	80	S390CPU *cpu = S390_CPU(cs);
	81	CPUS390XState *env = &cpu->env;
	82
	83	return (cs->interrupt_request & CPU_INTERRUPT_HARD) &&
	84	(env->psw.mask & PSW_MASK_EXT);
	85	}
	86
29c6157c CB	87	#if !defined(CONFIG_USER_ONLY)
	88	/* S390CPUClass::load_normal() */
	89	static void s390_cpu_load_normal(CPUState *s)
	90	{
	91	S390CPU *cpu = S390_CPU(s);
fdfba1a2	92	cpu->env.psw.addr = ldl_phys(s->as, 4) & PSW_MASK_ESA_ADDR;
29c6157c	93	cpu->env.psw.mask = PSW_MASK_32 \| PSW_MASK_64;
eb24f7c6	94	s390_cpu_set_state(CPU_STATE_OPERATING, cpu);
29c6157c CB	95	}
	96	#endif
	97
f5ae2a4f	98	/* S390CPUClass::cpu_reset() */
29e4bcb2 AF	99	static void s390_cpu_reset(CPUState *s)
	100	{
	101	S390CPU *cpu = S390_CPU(s);
	102	S390CPUClass *scc = S390_CPU_GET_CLASS(cpu);
	103	CPUS390XState *env = &cpu->env;
	104
819bd309	105	env->pfault_token = -1UL;
f5ae2a4f	106	scc->parent_reset(s);
18ff9494	107	cpu->env.sigp_order = 0;
eb24f7c6	108	s390_cpu_set_state(CPU_STATE_STOPPED, cpu);
00c8cb0a	109	tlb_flush(s, 1);
f5ae2a4f CB	110	}
	111
	112	/* S390CPUClass::initial_reset() */
	113	static void s390_cpu_initial_reset(CPUState *s)
	114	{
	115	S390CPU *cpu = S390_CPU(s);
	116	CPUS390XState *env = &cpu->env;
cc0d079d	117	int i;
f5ae2a4f CB	118
	119	s390_cpu_reset(s);
	120	/* initial reset does not touch regs,fregs and aregs */
f0c3c505	121	memset(&env->fpc, 0, offsetof(CPUS390XState, cpu_num) -
f5ae2a4f CB	122	offsetof(CPUS390XState, fpc));
	123
	124	/* architectured initial values for CR 0 and 14 */
	125	env->cregs[0] = CR0_RESET;
	126	env->cregs[14] = CR14_RESET;
819bd309	127
3da0ab35 AJ	128	/* architectured initial value for Breaking-Event-Address register */
	129	env->gbea = 1;
	130
819bd309	131	env->pfault_token = -1UL;
7107e5a7	132	env->ext_index = -1;
cc0d079d AJ	133	for (i = 0; i < ARRAY_SIZE(env->io_index); i++) {
	134	env->io_index[i] = -1;
	135	}
49f5c9e9	136
4a33565f AJ	137	/* tininess for underflow is detected before rounding */
	138	set_float_detect_tininess(float_tininess_before_rounding,
	139	&env->fpu_status);
	140
49f5c9e9 TH	141	/* Reset state inside the kernel that we cannot access yet from QEMU. */
49f5c9e9 TH	142	if (kvm_enabled()) {
99607144	143	kvm_s390_reset_vcpu(cpu);
49f5c9e9	144	}
cbed0ba7	145	tlb_flush(s, 1);
f5ae2a4f CB	146	}
	147
	148	/* CPUClass:reset() */
	149	static void s390_cpu_full_reset(CPUState *s)
	150	{
	151	S390CPU *cpu = S390_CPU(s);
	152	S390CPUClass *scc = S390_CPU_GET_CLASS(cpu);
	153	CPUS390XState *env = &cpu->env;
cc0d079d	154	int i;
f5ae2a4f	155
29e4bcb2	156	scc->parent_reset(s);
18ff9494	157	cpu->env.sigp_order = 0;
eb24f7c6	158	s390_cpu_set_state(CPU_STATE_STOPPED, cpu);
29e4bcb2	159
f0c3c505	160	memset(env, 0, offsetof(CPUS390XState, cpu_num));
70bada03 JF	161
	162	/* architectured initial values for CR 0 and 14 */
	163	env->cregs[0] = CR0_RESET;
	164	env->cregs[14] = CR14_RESET;
819bd309	165
3da0ab35 AJ	166	/* architectured initial value for Breaking-Event-Address register */
	167	env->gbea = 1;
	168
819bd309	169	env->pfault_token = -1UL;
7107e5a7	170	env->ext_index = -1;
cc0d079d AJ	171	for (i = 0; i < ARRAY_SIZE(env->io_index); i++) {
	172	env->io_index[i] = -1;
	173	}
819bd309	174
4a33565f AJ	175	/* tininess for underflow is detected before rounding */
	176	set_float_detect_tininess(float_tininess_before_rounding,
	177	&env->fpu_status);
	178
99607144	179	/* Reset state inside the kernel that we cannot access yet from QEMU. */
50a2c6e5 PB	180	if (kvm_enabled()) {
	181	kvm_s390_reset_vcpu(cpu);
	182	}
00c8cb0a	183	tlb_flush(s, 1);
29e4bcb2 AF	184	}
29e4bcb2 AF	185
70bada03 JF	186	#if !defined(CONFIG_USER_ONLY)
	187	static void s390_cpu_machine_reset_cb(void *opaque)
	188	{
	189	S390CPU *cpu = opaque;
	190
1fad8b3b	191	run_on_cpu(CPU(cpu), s390_do_cpu_full_reset, CPU(cpu));
70bada03 JF	192	}
	193	#endif
	194
dbad6b74 PC	195	static void s390_cpu_disas_set_info(CPUState cpu, disassemble_info info)
	196	{
	197	info->mach = bfd_mach_s390_64;
	198	info->print_insn = print_insn_s390;
	199	}
	200
1f136632 AF	201	static void s390_cpu_realizefn(DeviceState dev, Error *errp)
1f136632 AF	202	{
14a10fc3	203	CPUState *cs = CPU(dev);
1f136632	204	S390CPUClass *scc = S390_CPU_GET_CLASS(dev);
c6644fc8 MR	205	S390CPU *cpu = S390_CPU(dev);
	206	CPUS390XState *env = &cpu->env;
	207	Error *err = NULL;
	208
96b1a8bb MR	209	#if !defined(CONFIG_USER_ONLY)
	210	if (cpu->id >= max_cpus) {
	211	error_setg(&err, "Unable to add CPU: %" PRIi64
	212	", max allowed: %d", cpu->id, max_cpus - 1);
	213	goto out;
	214	}
	215	#endif
	216	if (cpu_exists(cpu->id)) {
	217	error_setg(&err, "Unable to add CPU: %" PRIi64
	218	", it already exists", cpu->id);
	219	goto out;
	220	}
	221	if (cpu->id != scc->next_cpu_id) {
	222	error_setg(&err, "Unable to add CPU: %" PRIi64
	223	", The next available id is %" PRIi64, cpu->id,
	224	scc->next_cpu_id);
	225	goto out;
	226	}
	227
c6644fc8 MR	228	cpu_exec_init(cs, &err);
c6644fc8 MR	229	if (err != NULL) {
96b1a8bb	230	goto out;
c6644fc8	231	}
96b1a8bb	232	scc->next_cpu_id++;
1f136632	233
c6644fc8 MR	234	#if !defined(CONFIG_USER_ONLY)
	235	qemu_register_reset(s390_cpu_machine_reset_cb, cpu);
	236	#endif
96b1a8bb	237	env->cpu_num = cpu->id;
73d510c9	238	s390_cpu_gdb_init(cs);
14a10fc3	239	qemu_init_vcpu(cs);
159855f0 DH	240	#if !defined(CONFIG_USER_ONLY)
	241	run_on_cpu(cs, s390_do_cpu_full_reset, cs);
	242	#else
14a10fc3	243	cpu_reset(cs);
159855f0	244	#endif
1f136632	245
96b1a8bb MR	246	scc->parent_realize(dev, &err);
96b1a8bb MR	247
a006b67f MR	248	#if !defined(CONFIG_USER_ONLY)
	249	if (dev->hotplugged) {
	250	raise_irq_cpu_hotplug();
	251	}
	252	#endif
	253
96b1a8bb MR	254	out:
	255	error_propagate(errp, err);
	256	}
	257
	258	static void s390x_cpu_get_id(Object obj, Visitor v, const char *name,
	259	void opaque, Error *errp)
	260	{
	261	S390CPU *cpu = S390_CPU(obj);
	262	int64_t value = cpu->id;
	263
	264	visit_type_int(v, name, &value, errp);
	265	}
	266
	267	static void s390x_cpu_set_id(Object obj, Visitor v, const char *name,
	268	void opaque, Error *errp)
	269	{
	270	S390CPU *cpu = S390_CPU(obj);
	271	DeviceState *dev = DEVICE(obj);
	272	const int64_t min = 0;
	273	const int64_t max = UINT32_MAX;
	274	Error *err = NULL;
	275	int64_t value;
	276
	277	if (dev->realized) {
	278	error_setg(errp, "Attempt to set property '%s' on '%s' after "
	279	"it was realized", name, object_get_typename(obj));
	280	return;
	281	}
	282
	283	visit_type_int(v, name, &value, &err);
	284	if (err) {
	285	error_propagate(errp, err);
	286	return;
	287	}
	288	if (value < min \|\| value > max) {
	289	error_setg(errp, "Property %s.%s doesn't take value %" PRId64
	290	" (minimum: %" PRId64 ", maximum: %" PRId64 ")" ,
	291	object_get_typename(obj), name, value, min, max);
	292	return;
	293	}
	294	cpu->id = value;
1f136632 AF	295	}
1f136632 AF	296
8f22e0df AF	297	static void s390_cpu_initfn(Object *obj)
8f22e0df AF	298	{
c05efcb1	299	CPUState *cs = CPU(obj);
8f22e0df AF	300	S390CPU *cpu = S390_CPU(obj);
8f22e0df AF	301	CPUS390XState *env = &cpu->env;
2b7ac767	302	static bool inited;
8f22e0df AF	303	#if !defined(CONFIG_USER_ONLY)
	304	struct tm tm;
	305	#endif
	306
c05efcb1	307	cs->env_ptr = env;
ef3027af MR	308	cs->halted = 1;
ef3027af MR	309	cs->exception_index = EXCP_HLT;
96b1a8bb MR	310	object_property_add(OBJECT(cpu), "id", "int64_t", s390x_cpu_get_id,
96b1a8bb MR	311	s390x_cpu_set_id, NULL, NULL, NULL);
8f22e0df AF	312	#if !defined(CONFIG_USER_ONLY)
	313	qemu_get_timedate(&tm, 0);
	314	env->tod_offset = TOD_UNIX_EPOCH +
	315	(time2tod(mktimegm(&tm)) * 1000000000ULL);
	316	env->tod_basetime = 0;
bc72ad67 AB	317	env->tod_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, s390x_tod_timer, cpu);
bc72ad67 AB	318	env->cpu_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, s390x_cpu_timer, cpu);
eb24f7c6	319	s390_cpu_set_state(CPU_STATE_STOPPED, cpu);
8f22e0df	320	#endif
2b7ac767 AF	321
	322	if (tcg_enabled() && !inited) {
	323	inited = true;
	324	s390x_translate_init();
	325	}
8f22e0df AF	326	}
8f22e0df AF	327
d5627ce8 AF	328	static void s390_cpu_finalize(Object *obj)
	329	{
	330	#if !defined(CONFIG_USER_ONLY)
	331	S390CPU *cpu = S390_CPU(obj);
	332
	333	qemu_unregister_reset(s390_cpu_machine_reset_cb, cpu);
3cda44f7	334	g_free(cpu->irqstate);
d5627ce8 AF	335	#endif
	336	}
	337
75973bfe	338	#if !defined(CONFIG_USER_ONLY)
eb24f7c6 DH	339	static bool disabled_wait(CPUState *cpu)
	340	{
	341	return cpu->halted && !(S390_CPU(cpu)->env.psw.mask &
	342	(PSW_MASK_IO \| PSW_MASK_EXT \| PSW_MASK_MCHECK));
	343	}
	344
75973bfe DH	345	static unsigned s390_count_running_cpus(void)
	346	{
	347	CPUState *cpu;
	348	int nr_running = 0;
	349
	350	CPU_FOREACH(cpu) {
	351	uint8_t state = S390_CPU(cpu)->env.cpu_state;
	352	if (state == CPU_STATE_OPERATING \|\|
	353	state == CPU_STATE_LOAD) {
eb24f7c6 DH	354	if (!disabled_wait(cpu)) {
	355	nr_running++;
	356	}
75973bfe DH	357	}
	358	}
	359
	360	return nr_running;
	361	}
	362
eb24f7c6	363	unsigned int s390_cpu_halt(S390CPU *cpu)
75973bfe DH	364	{
75973bfe DH	365	CPUState *cs = CPU(cpu);
eb24f7c6	366	trace_cpu_halt(cs->cpu_index);
75973bfe	367
eb24f7c6 DH	368	if (!cs->halted) {
	369	cs->halted = 1;
	370	cs->exception_index = EXCP_HLT;
75973bfe	371	}
eb24f7c6 DH	372
eb24f7c6 DH	373	return s390_count_running_cpus();
75973bfe DH	374	}
75973bfe DH	375
eb24f7c6	376	void s390_cpu_unhalt(S390CPU *cpu)
75973bfe DH	377	{
75973bfe DH	378	CPUState *cs = CPU(cpu);
eb24f7c6	379	trace_cpu_unhalt(cs->cpu_index);
75973bfe	380
eb24f7c6 DH	381	if (cs->halted) {
	382	cs->halted = 0;
	383	cs->exception_index = -1;
	384	}
	385	}
	386
	387	unsigned int s390_cpu_set_state(uint8_t cpu_state, S390CPU *cpu)
	388	{
	389	trace_cpu_set_state(CPU(cpu)->cpu_index, cpu_state);
	390
	391	switch (cpu_state) {
	392	case CPU_STATE_STOPPED:
	393	case CPU_STATE_CHECK_STOP:
	394	/* halt the cpu for common infrastructure */
	395	s390_cpu_halt(cpu);
	396	break;
	397	case CPU_STATE_OPERATING:
	398	case CPU_STATE_LOAD:
	399	/* unhalt the cpu for common infrastructure */
	400	s390_cpu_unhalt(cpu);
	401	break;
	402	default:
	403	error_report("Requested CPU state is not a valid S390 CPU state: %u",
	404	cpu_state);
	405	exit(1);
75973bfe	406	}
c9e659c9 DH	407	if (kvm_enabled() && cpu->env.cpu_state != cpu_state) {
	408	kvm_s390_set_cpu_state(cpu, cpu_state);
	409	}
eb24f7c6	410	cpu->env.cpu_state = cpu_state;
75973bfe DH	411
	412	return s390_count_running_cpus();
	413	}
	414	#endif
	415
b3820e6c DH	416	static gchar s390_gdb_arch_name(CPUState cs)
	417	{
	418	return g_strdup("s390:64-bit");
	419	}
	420
29e4bcb2 AF	421	static void s390_cpu_class_init(ObjectClass oc, void data)
	422	{
	423	S390CPUClass *scc = S390_CPU_CLASS(oc);
	424	CPUClass *cc = CPU_CLASS(scc);
c7396bbb	425	DeviceClass *dc = DEVICE_CLASS(oc);
29e4bcb2	426
c6644fc8	427	scc->next_cpu_id = 0;
1f136632 AF	428	scc->parent_realize = dc->realize;
	429	dc->realize = s390_cpu_realizefn;
	430
29e4bcb2	431	scc->parent_reset = cc->reset;
29c6157c CB	432	#if !defined(CONFIG_USER_ONLY)
	433	scc->load_normal = s390_cpu_load_normal;
	434	#endif
f5ae2a4f CB	435	scc->cpu_reset = s390_cpu_reset;
	436	scc->initial_cpu_reset = s390_cpu_initial_reset;
	437	cc->reset = s390_cpu_full_reset;
8c2e1b00	438	cc->has_work = s390_cpu_has_work;
97a8ea5a	439	cc->do_interrupt = s390_cpu_do_interrupt;
878096ee	440	cc->dump_state = s390_cpu_dump_state;
f45748f1	441	cc->set_pc = s390_cpu_set_pc;
5b50e790 AF	442	cc->gdb_read_register = s390_cpu_gdb_read_register;
5b50e790 AF	443	cc->gdb_write_register = s390_cpu_gdb_write_register;
7510454e AF	444	#ifdef CONFIG_USER_ONLY
	445	cc->handle_mmu_fault = s390_cpu_handle_mmu_fault;
	446	#else
00b941e5	447	cc->get_phys_page_debug = s390_cpu_get_phys_page_debug;
ef1df130	448	cc->vmsd = &vmstate_s390_cpu;
9b4f38e1	449	cc->write_elf64_note = s390_cpu_write_elf64_note;
02bb9bbf	450	cc->cpu_exec_interrupt = s390_cpu_exec_interrupt;
311918b9	451	cc->debug_excp_handler = s390x_cpu_debug_excp_handler;
00b941e5	452	#endif
dbad6b74 PC	453	cc->disas_set_info = s390_cpu_disas_set_info;
dbad6b74 PC	454
73d510c9 DH	455	cc->gdb_num_core_regs = S390_NUM_CORE_REGS;
73d510c9 DH	456	cc->gdb_core_xml_file = "s390x-core64.xml";
b3820e6c	457	cc->gdb_arch_name = s390_gdb_arch_name;
4c315c27 MA	458
4c315c27 MA	459	/*
c6644fc8	460	* Reason: s390_cpu_realizefn() calls cpu_exec_init(), which saves
4c315c27 MA	461	* the object in cpus -> dangling pointer after final
	462	* object_unref().
	463	*/
	464	dc->cannot_destroy_with_object_finalize_yet = true;
29e4bcb2 AF	465	}
	466
	467	static const TypeInfo s390_cpu_type_info = {
	468	.name = TYPE_S390_CPU,
	469	.parent = TYPE_CPU,
	470	.instance_size = sizeof(S390CPU),
8f22e0df	471	.instance_init = s390_cpu_initfn,
d5627ce8	472	.instance_finalize = s390_cpu_finalize,
29e4bcb2 AF	473	.abstract = false,
	474	.class_size = sizeof(S390CPUClass),
	475	.class_init = s390_cpu_class_init,
	476	};
	477
	478	static void s390_cpu_register_types(void)
	479	{
	480	type_register_static(&s390_cpu_type_info);
	481	}
	482
	483	type_init(s390_cpu_register_types)