[mirror_qemu.git] / cpu.c

/*
 * Target-specific parts of the CPU object
 *
 *  Copyright (c) 2003 Fabrice Bellard
 *
 * 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 "exec/target_page.h"
#include "hw/qdev-core.h"
#include "hw/qdev-properties.h"
#include "qemu/error-report.h"
#include "migration/vmstate.h"
#ifdef CONFIG_USER_ONLY
#include "qemu.h"
#else
#include "hw/core/sysemu-cpu-ops.h"
#include "exec/address-spaces.h"
#endif
#include "sysemu/tcg.h"
#include "sysemu/kvm.h"
#include "sysemu/replay.h"
#include "exec/cpu-common.h"
#include "exec/exec-all.h"
#include "exec/translate-all.h"
#include "exec/log.h"
#include "hw/core/accel-cpu.h"
#include "trace/trace-root.h"
#include "qemu/accel.h"

uintptr_t qemu_host_page_size;
intptr_t qemu_host_page_mask;

#ifndef CONFIG_USER_ONLY
static int cpu_common_post_load(void *opaque, int version_id)
{
    CPUState *cpu = opaque;

    /* 0x01 was CPU_INTERRUPT_EXIT. This line can be removed when the
       version_id is increased. */
    cpu->interrupt_request &= ~0x01;
    tlb_flush(cpu);

    /* loadvm has just updated the content of RAM, bypassing the
     * usual mechanisms that ensure we flush TBs for writes to
     * memory we've translated code from. So we must flush all TBs,
     * which will now be stale.
     */
    tb_flush(cpu);

    return 0;
}

static int cpu_common_pre_load(void *opaque)
{
    CPUState *cpu = opaque;

    cpu->exception_index = -1;

    return 0;
}

static bool cpu_common_exception_index_needed(void *opaque)
{
    CPUState *cpu = opaque;

    return tcg_enabled() && cpu->exception_index != -1;
}

static const VMStateDescription vmstate_cpu_common_exception_index = {
    .name = "cpu_common/exception_index",
    .version_id = 1,
    .minimum_version_id = 1,
    .needed = cpu_common_exception_index_needed,
    .fields = (VMStateField[]) {
        VMSTATE_INT32(exception_index, CPUState),
        VMSTATE_END_OF_LIST()
    }
};

static bool cpu_common_crash_occurred_needed(void *opaque)
{
    CPUState *cpu = opaque;

    return cpu->crash_occurred;
}

static const VMStateDescription vmstate_cpu_common_crash_occurred = {
    .name = "cpu_common/crash_occurred",
    .version_id = 1,
    .minimum_version_id = 1,
    .needed = cpu_common_crash_occurred_needed,
    .fields = (VMStateField[]) {
        VMSTATE_BOOL(crash_occurred, CPUState),
        VMSTATE_END_OF_LIST()
    }
};

const VMStateDescription vmstate_cpu_common = {
    .name = "cpu_common",
    .version_id = 1,
    .minimum_version_id = 1,
    .pre_load = cpu_common_pre_load,
    .post_load = cpu_common_post_load,
    .fields = (VMStateField[]) {
        VMSTATE_UINT32(halted, CPUState),
        VMSTATE_UINT32(interrupt_request, CPUState),
        VMSTATE_END_OF_LIST()
    },
    .subsections = (const VMStateDescription*[]) {
        &vmstate_cpu_common_exception_index,
        &vmstate_cpu_common_crash_occurred,
        NULL
    }
};
#endif

void cpu_exec_realizefn(CPUState *cpu, Error **errp)
{
    /* cache the cpu class for the hotpath */
    cpu->cc = CPU_GET_CLASS(cpu);

    cpu_list_add(cpu);
    if (!accel_cpu_realizefn(cpu, errp)) {
        return;
    }
    /* NB: errp parameter is unused currently */
    if (tcg_enabled()) {
        tcg_exec_realizefn(cpu, errp);
    }

#ifdef CONFIG_USER_ONLY
    assert(qdev_get_vmsd(DEVICE(cpu)) == NULL ||
           qdev_get_vmsd(DEVICE(cpu))->unmigratable);
#else
    if (qdev_get_vmsd(DEVICE(cpu)) == NULL) {
        vmstate_register(NULL, cpu->cpu_index, &vmstate_cpu_common, cpu);
    }
    if (cpu->cc->sysemu_ops->legacy_vmsd != NULL) {
        vmstate_register(NULL, cpu->cpu_index, cpu->cc->sysemu_ops->legacy_vmsd, cpu);
    }
#endif /* CONFIG_USER_ONLY */
}

void cpu_exec_unrealizefn(CPUState *cpu)
{
#ifndef CONFIG_USER_ONLY
    CPUClass *cc = CPU_GET_CLASS(cpu);

    if (cc->sysemu_ops->legacy_vmsd != NULL) {
        vmstate_unregister(NULL, cc->sysemu_ops->legacy_vmsd, cpu);
    }
    if (qdev_get_vmsd(DEVICE(cpu)) == NULL) {
        vmstate_unregister(NULL, &vmstate_cpu_common, cpu);
    }
#endif
    if (tcg_enabled()) {
        tcg_exec_unrealizefn(cpu);
    }

    cpu_list_remove(cpu);
}

/*
 * This can't go in hw/core/cpu.c because that file is compiled only
 * once for both user-mode and system builds.
 */
static Property cpu_common_props[] = {
#ifdef CONFIG_USER_ONLY
    /*
     * Create a property for the user-only object, so users can
     * adjust prctl(PR_SET_UNALIGN) from the command-line.
     * Has no effect if the target does not support the feature.
     */
    DEFINE_PROP_BOOL("prctl-unalign-sigbus", CPUState,
                     prctl_unalign_sigbus, false),
#else
    /*
     * Create a memory property for softmmu CPU object, so users can
     * wire up its memory.  The default if no link is set up is to use
     * the system address space.
     */
    DEFINE_PROP_LINK("memory", CPUState, memory, TYPE_MEMORY_REGION,
                     MemoryRegion *),
#endif
    DEFINE_PROP_END_OF_LIST(),
};

static bool cpu_get_start_powered_off(Object *obj, Error **errp)
{
    CPUState *cpu = CPU(obj);
    return cpu->start_powered_off;
}

static void cpu_set_start_powered_off(Object *obj, bool value, Error **errp)
{
    CPUState *cpu = CPU(obj);
    cpu->start_powered_off = value;
}

void cpu_class_init_props(DeviceClass *dc)
{
    ObjectClass *oc = OBJECT_CLASS(dc);

    device_class_set_props(dc, cpu_common_props);
    /*
     * We can't use DEFINE_PROP_BOOL in the Property array for this
     * property, because we want this to be settable after realize.
     */
    object_class_property_add_bool(oc, "start-powered-off",
                                   cpu_get_start_powered_off,
                                   cpu_set_start_powered_off);
}

void cpu_exec_initfn(CPUState *cpu)
{
    cpu->as = NULL;
    cpu->num_ases = 0;

#ifndef CONFIG_USER_ONLY
    cpu->thread_id = qemu_get_thread_id();
    cpu->memory = get_system_memory();
    object_ref(OBJECT(cpu->memory));
#endif
}

const char *parse_cpu_option(const char *cpu_option)
{
    ObjectClass *oc;
    CPUClass *cc;
    gchar **model_pieces;
    const char *cpu_type;

    model_pieces = g_strsplit(cpu_option, ",", 2);
    if (!model_pieces[0]) {
        error_report("-cpu option cannot be empty");
        exit(1);
    }

    oc = cpu_class_by_name(CPU_RESOLVING_TYPE, model_pieces[0]);
    if (oc == NULL) {
        error_report("unable to find CPU model '%s'", model_pieces[0]);
        g_strfreev(model_pieces);
        exit(EXIT_FAILURE);
    }

    cpu_type = object_class_get_name(oc);
    cc = CPU_CLASS(oc);
    cc->parse_features(cpu_type, model_pieces[1], &error_fatal);
    g_strfreev(model_pieces);
    return cpu_type;
}

void list_cpus(const char *optarg)
{
    /* XXX: implement xxx_cpu_list for targets that still miss it */
#if defined(cpu_list)
    cpu_list();
#endif
}

#if defined(CONFIG_USER_ONLY)
void tb_invalidate_phys_addr(target_ulong addr)
{
    mmap_lock();
    tb_invalidate_phys_page(addr);
    mmap_unlock();
}
#else
void tb_invalidate_phys_addr(AddressSpace *as, hwaddr addr, MemTxAttrs attrs)
{
    ram_addr_t ram_addr;
    MemoryRegion *mr;
    hwaddr l = 1;

    if (!tcg_enabled()) {
        return;
    }

    RCU_READ_LOCK_GUARD();
    mr = address_space_translate(as, addr, &addr, &l, false, attrs);
    if (!(memory_region_is_ram(mr)
          || memory_region_is_romd(mr))) {
        return;
    }
    ram_addr = memory_region_get_ram_addr(mr) + addr;
    tb_invalidate_phys_page(ram_addr);
}
#endif

/* Add a breakpoint.  */
int cpu_breakpoint_insert(CPUState *cpu, vaddr pc, int flags,
                          CPUBreakpoint **breakpoint)
{
    CPUClass *cc = CPU_GET_CLASS(cpu);
    CPUBreakpoint *bp;

    if (cc->gdb_adjust_breakpoint) {
        pc = cc->gdb_adjust_breakpoint(cpu, pc);
    }

    bp = g_malloc(sizeof(*bp));

    bp->pc = pc;
    bp->flags = flags;

    /* keep all GDB-injected breakpoints in front */
    if (flags & BP_GDB) {
        QTAILQ_INSERT_HEAD(&cpu->breakpoints, bp, entry);
    } else {
        QTAILQ_INSERT_TAIL(&cpu->breakpoints, bp, entry);
    }

    if (breakpoint) {
        *breakpoint = bp;
    }

    trace_breakpoint_insert(cpu->cpu_index, pc, flags);
    return 0;
}

/* Remove a specific breakpoint.  */
int cpu_breakpoint_remove(CPUState *cpu, vaddr pc, int flags)
{
    CPUClass *cc = CPU_GET_CLASS(cpu);
    CPUBreakpoint *bp;

    if (cc->gdb_adjust_breakpoint) {
        pc = cc->gdb_adjust_breakpoint(cpu, pc);
    }

    QTAILQ_FOREACH(bp, &cpu->breakpoints, entry) {
        if (bp->pc == pc && bp->flags == flags) {
            cpu_breakpoint_remove_by_ref(cpu, bp);
            return 0;
        }
    }
    return -ENOENT;
}

/* Remove a specific breakpoint by reference.  */
void cpu_breakpoint_remove_by_ref(CPUState *cpu, CPUBreakpoint *bp)
{
    QTAILQ_REMOVE(&cpu->breakpoints, bp, entry);

    trace_breakpoint_remove(cpu->cpu_index, bp->pc, bp->flags);
    g_free(bp);
}

/* Remove all matching breakpoints. */
void cpu_breakpoint_remove_all(CPUState *cpu, int mask)
{
    CPUBreakpoint *bp, *next;

    QTAILQ_FOREACH_SAFE(bp, &cpu->breakpoints, entry, next) {
        if (bp->flags & mask) {
            cpu_breakpoint_remove_by_ref(cpu, bp);
        }
    }
}

/* enable or disable single step mode. EXCP_DEBUG is returned by the
   CPU loop after each instruction */
void cpu_single_step(CPUState *cpu, int enabled)
{
    if (cpu->singlestep_enabled != enabled) {
        cpu->singlestep_enabled = enabled;
        if (kvm_enabled()) {
            kvm_update_guest_debug(cpu, 0);
        }
        trace_breakpoint_singlestep(cpu->cpu_index, enabled);
    }
}

void cpu_abort(CPUState *cpu, const char *fmt, ...)
{
    va_list ap;
    va_list ap2;

    va_start(ap, fmt);
    va_copy(ap2, ap);
    fprintf(stderr, "qemu: fatal: ");
    vfprintf(stderr, fmt, ap);
    fprintf(stderr, "\n");
    cpu_dump_state(cpu, stderr, CPU_DUMP_FPU | CPU_DUMP_CCOP);
    if (qemu_log_separate()) {
        FILE *logfile = qemu_log_trylock();
        if (logfile) {
            fprintf(logfile, "qemu: fatal: ");
            vfprintf(logfile, fmt, ap2);
            fprintf(logfile, "\n");
            cpu_dump_state(cpu, logfile, CPU_DUMP_FPU | CPU_DUMP_CCOP);
            qemu_log_unlock(logfile);
        }
    }
    va_end(ap2);
    va_end(ap);
    replay_finish();
#if defined(CONFIG_USER_ONLY)
    {
        struct sigaction act;
        sigfillset(&act.sa_mask);
        act.sa_handler = SIG_DFL;
        act.sa_flags = 0;
        sigaction(SIGABRT, &act, NULL);
    }
#endif
    abort();
}

/* physical memory access (slow version, mainly for debug) */
#if defined(CONFIG_USER_ONLY)
int cpu_memory_rw_debug(CPUState *cpu, vaddr addr,
                        void *ptr, size_t len, bool is_write)
{
    int flags;
    vaddr l, page;
    void * p;
    uint8_t *buf = ptr;

    while (len > 0) {
        page = addr & TARGET_PAGE_MASK;
        l = (page + TARGET_PAGE_SIZE) - addr;
        if (l > len)
            l = len;
        flags = page_get_flags(page);
        if (!(flags & PAGE_VALID))
            return -1;
        if (is_write) {
            if (!(flags & PAGE_WRITE))
                return -1;
            /* XXX: this code should not depend on lock_user */
            if (!(p = lock_user(VERIFY_WRITE, addr, l, 0)))
                return -1;
            memcpy(p, buf, l);
            unlock_user(p, addr, l);
        } else {
            if (!(flags & PAGE_READ))
                return -1;
            /* XXX: this code should not depend on lock_user */
            if (!(p = lock_user(VERIFY_READ, addr, l, 1)))
                return -1;
            memcpy(buf, p, l);
            unlock_user(p, addr, 0);
        }
        len -= l;
        buf += l;
        addr += l;
    }
    return 0;
}
#endif

bool target_words_bigendian(void)
{
#if TARGET_BIG_ENDIAN
    return true;
#else
    return false;
#endif
}

void page_size_init(void)
{
    /* NOTE: we can always suppose that qemu_host_page_size >=
       TARGET_PAGE_SIZE */
    if (qemu_host_page_size == 0) {
        qemu_host_page_size = qemu_real_host_page_size();
    }
    if (qemu_host_page_size < TARGET_PAGE_SIZE) {
        qemu_host_page_size = TARGET_PAGE_SIZE;
    }
    qemu_host_page_mask = -(intptr_t)qemu_host_page_size;
}
Commit	Line	Data
d9f24bf5 PB	1	/*
	2	* Target-specific parts of the CPU object
	3	*
	4	* Copyright (c) 2003 Fabrice Bellard
	5	*
	6	* This library is free software; you can redistribute it and/or
	7	* modify it under the terms of the GNU Lesser General Public
	8	* License as published by the Free Software Foundation; either
	9	* version 2 of the License, or (at your option) any later version.
	10	*
	11	* This library is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	14	* Lesser General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU Lesser General Public
	17	* License along with this library; if not, see <http://www.gnu.org/licenses/>.
	18	*/
	19
	20	#include "qemu/osdep.h"
d9f24bf5 PB	21	#include "qapi/error.h"
	22
	23	#include "exec/target_page.h"
	24	#include "hw/qdev-core.h"
	25	#include "hw/qdev-properties.h"
	26	#include "qemu/error-report.h"
	27	#include "migration/vmstate.h"
	28	#ifdef CONFIG_USER_ONLY
	29	#include "qemu.h"
	30	#else
8b80bd28	31	#include "hw/core/sysemu-cpu-ops.h"
d9f24bf5 PB	32	#include "exec/address-spaces.h"
	33	#endif
	34	#include "sysemu/tcg.h"
	35	#include "sysemu/kvm.h"
	36	#include "sysemu/replay.h"
377bf6f3	37	#include "exec/cpu-common.h"
3b04508c	38	#include "exec/exec-all.h"
3b9bd3f4	39	#include "exec/translate-all.h"
d9f24bf5	40	#include "exec/log.h"
30565f10	41	#include "hw/core/accel-cpu.h"
ad1a706f	42	#include "trace/trace-root.h"
3b04508c	43	#include "qemu/accel.h"
d9f24bf5 PB	44
	45	uintptr_t qemu_host_page_size;
	46	intptr_t qemu_host_page_mask;
	47
	48	#ifndef CONFIG_USER_ONLY
	49	static int cpu_common_post_load(void *opaque, int version_id)
	50	{
	51	CPUState *cpu = opaque;
	52
	53	/* 0x01 was CPU_INTERRUPT_EXIT. This line can be removed when the
	54	version_id is increased. */
	55	cpu->interrupt_request &= ~0x01;
	56	tlb_flush(cpu);
	57
	58	/* loadvm has just updated the content of RAM, bypassing the
	59	* usual mechanisms that ensure we flush TBs for writes to
	60	* memory we've translated code from. So we must flush all TBs,
	61	* which will now be stale.
	62	*/
	63	tb_flush(cpu);
	64
	65	return 0;
	66	}
	67
	68	static int cpu_common_pre_load(void *opaque)
	69	{
	70	CPUState *cpu = opaque;
	71
	72	cpu->exception_index = -1;
	73
	74	return 0;
	75	}
	76
	77	static bool cpu_common_exception_index_needed(void *opaque)
	78	{
	79	CPUState *cpu = opaque;
	80
	81	return tcg_enabled() && cpu->exception_index != -1;
	82	}
	83
	84	static const VMStateDescription vmstate_cpu_common_exception_index = {
	85	.name = "cpu_common/exception_index",
	86	.version_id = 1,
	87	.minimum_version_id = 1,
	88	.needed = cpu_common_exception_index_needed,
	89	.fields = (VMStateField[]) {
	90	VMSTATE_INT32(exception_index, CPUState),
	91	VMSTATE_END_OF_LIST()
	92	}
	93	};
	94
	95	static bool cpu_common_crash_occurred_needed(void *opaque)
	96	{
	97	CPUState *cpu = opaque;
	98
	99	return cpu->crash_occurred;
	100	}
	101
	102	static const VMStateDescription vmstate_cpu_common_crash_occurred = {
	103	.name = "cpu_common/crash_occurred",
	104	.version_id = 1,
	105	.minimum_version_id = 1,
	106	.needed = cpu_common_crash_occurred_needed,
	107	.fields = (VMStateField[]) {
108	VMSTATE_BOOL(crash_occurred, CPUState),
109	VMSTATE_END_OF_LIST()
110	}
111	};
112
113	const VMStateDescription vmstate_cpu_common = {
114	.name = "cpu_common",
115	.version_id = 1,
116	.minimum_version_id = 1,
117	.pre_load = cpu_common_pre_load,
118	.post_load = cpu_common_post_load,
119	.fields = (VMStateField[]) {
120	VMSTATE_UINT32(halted, CPUState),
121	VMSTATE_UINT32(interrupt_request, CPUState),
122	VMSTATE_END_OF_LIST()
123	},
124	.subsections = (const VMStateDescription*[]) {
125	&vmstate_cpu_common_exception_index,
126	&vmstate_cpu_common_crash_occurred,
127	NULL
128	}
129	};
130	#endif
131
7df5e3d6	132	void cpu_exec_realizefn(CPUState cpu, Error *errp)
d9f24bf5	133	{
6fbdff87 AB	134	/* cache the cpu class for the hotpath */
6fbdff87 AB	135	cpu->cc = CPU_GET_CLASS(cpu);
d9f24bf5	136
7df5e3d6	137	cpu_list_add(cpu);
9ea057dc CF	138	if (!accel_cpu_realizefn(cpu, errp)) {
	139	return;
	140	}
7df5e3d6 CF	141	/* NB: errp parameter is unused currently */
	142	if (tcg_enabled()) {
	143	tcg_exec_realizefn(cpu, errp);
	144	}
7df5e3d6 CF	145
7df5e3d6 CF	146	#ifdef CONFIG_USER_ONLY
4336073b PMD	147	assert(qdev_get_vmsd(DEVICE(cpu)) == NULL \|\|
4336073b PMD	148	qdev_get_vmsd(DEVICE(cpu))->unmigratable);
7df5e3d6 CF	149	#else
	150	if (qdev_get_vmsd(DEVICE(cpu)) == NULL) {
	151	vmstate_register(NULL, cpu->cpu_index, &vmstate_cpu_common, cpu);
	152	}
6fbdff87 AB	153	if (cpu->cc->sysemu_ops->legacy_vmsd != NULL) {
6fbdff87 AB	154	vmstate_register(NULL, cpu->cpu_index, cpu->cc->sysemu_ops->legacy_vmsd, cpu);
7df5e3d6 CF	155	}
	156	#endif /* CONFIG_USER_ONLY */
	157	}
	158
	159	void cpu_exec_unrealizefn(CPUState *cpu)
	160	{
feece4d0	161	#ifndef CONFIG_USER_ONLY
7df5e3d6	162	CPUClass *cc = CPU_GET_CLASS(cpu);
d9f24bf5	163
feece4d0 PMD	164	if (cc->sysemu_ops->legacy_vmsd != NULL) {
feece4d0 PMD	165	vmstate_unregister(NULL, cc->sysemu_ops->legacy_vmsd, cpu);
d9f24bf5 PB	166	}
	167	if (qdev_get_vmsd(DEVICE(cpu)) == NULL) {
	168	vmstate_unregister(NULL, &vmstate_cpu_common, cpu);
	169	}
d9f24bf5	170	#endif
7df5e3d6 CF	171	if (tcg_enabled()) {
	172	tcg_exec_unrealizefn(cpu);
	173	}
7df5e3d6 CF	174
7df5e3d6 CF	175	cpu_list_remove(cpu);
d9f24bf5 PB	176	}
d9f24bf5 PB	177
6e8dcacd RH	178	/*
	179	* This can't go in hw/core/cpu.c because that file is compiled only
	180	* once for both user-mode and system builds.
	181	*/
995b87de	182	static Property cpu_common_props[] = {
6e8dcacd RH	183	#ifdef CONFIG_USER_ONLY
	184	/*
	185	* Create a property for the user-only object, so users can
	186	* adjust prctl(PR_SET_UNALIGN) from the command-line.
	187	* Has no effect if the target does not support the feature.
	188	*/
	189	DEFINE_PROP_BOOL("prctl-unalign-sigbus", CPUState,
	190	prctl_unalign_sigbus, false),
	191	#else
995b87de	192	/*
6e8dcacd RH	193	* Create a memory property for softmmu CPU object, so users can
6e8dcacd RH	194	* wire up its memory. The default if no link is set up is to use
995b87de RH	195	* the system address space.
	196	*/
	197	DEFINE_PROP_LINK("memory", CPUState, memory, TYPE_MEMORY_REGION,
	198	MemoryRegion *),
	199	#endif
995b87de RH	200	DEFINE_PROP_END_OF_LIST(),
	201	};
	202
0c3c25fc PM	203	static bool cpu_get_start_powered_off(Object obj, Error *errp)
	204	{
	205	CPUState *cpu = CPU(obj);
	206	return cpu->start_powered_off;
	207	}
	208
	209	static void cpu_set_start_powered_off(Object obj, bool value, Error *errp)
	210	{
	211	CPUState *cpu = CPU(obj);
	212	cpu->start_powered_off = value;
	213	}
	214
995b87de RH	215	void cpu_class_init_props(DeviceClass *dc)
995b87de RH	216	{
0c3c25fc PM	217	ObjectClass *oc = OBJECT_CLASS(dc);
0c3c25fc PM	218
995b87de	219	device_class_set_props(dc, cpu_common_props);
0c3c25fc PM	220	/*
	221	* We can't use DEFINE_PROP_BOOL in the Property array for this
	222	* property, because we want this to be settable after realize.
	223	*/
	224	object_class_property_add_bool(oc, "start-powered-off",
	225	cpu_get_start_powered_off,
	226	cpu_set_start_powered_off);
995b87de RH	227	}
995b87de RH	228
d9f24bf5 PB	229	void cpu_exec_initfn(CPUState *cpu)
	230	{
	231	cpu->as = NULL;
	232	cpu->num_ases = 0;
	233
	234	#ifndef CONFIG_USER_ONLY
	235	cpu->thread_id = qemu_get_thread_id();
	236	cpu->memory = get_system_memory();
	237	object_ref(OBJECT(cpu->memory));
	238	#endif
	239	}
	240
d9f24bf5 PB	241	const char parse_cpu_option(const char cpu_option)
	242	{
	243	ObjectClass *oc;
	244	CPUClass *cc;
	245	gchar **model_pieces;
	246	const char *cpu_type;
	247
	248	model_pieces = g_strsplit(cpu_option, ",", 2);
	249	if (!model_pieces[0]) {
	250	error_report("-cpu option cannot be empty");
	251	exit(1);
	252	}
	253
	254	oc = cpu_class_by_name(CPU_RESOLVING_TYPE, model_pieces[0]);
	255	if (oc == NULL) {
	256	error_report("unable to find CPU model '%s'", model_pieces[0]);
	257	g_strfreev(model_pieces);
	258	exit(EXIT_FAILURE);
	259	}
	260
	261	cpu_type = object_class_get_name(oc);
	262	cc = CPU_CLASS(oc);
	263	cc->parse_features(cpu_type, model_pieces[1], &error_fatal);
	264	g_strfreev(model_pieces);
	265	return cpu_type;
	266	}
	267
377bf6f3 PMD	268	void list_cpus(const char *optarg)
	269	{
	270	/* XXX: implement xxx_cpu_list for targets that still miss it */
	271	#if defined(cpu_list)
	272	cpu_list();
	273	#endif
	274	}
	275
d9f24bf5 PB	276	#if defined(CONFIG_USER_ONLY)
	277	void tb_invalidate_phys_addr(target_ulong addr)
	278	{
	279	mmap_lock();
d6d1fd29	280	tb_invalidate_phys_page(addr);
d9f24bf5 PB	281	mmap_unlock();
d9f24bf5 PB	282	}
d9f24bf5 PB	283	#else
	284	void tb_invalidate_phys_addr(AddressSpace *as, hwaddr addr, MemTxAttrs attrs)
	285	{
	286	ram_addr_t ram_addr;
	287	MemoryRegion *mr;
	288	hwaddr l = 1;
	289
	290	if (!tcg_enabled()) {
	291	return;
	292	}
	293
	294	RCU_READ_LOCK_GUARD();
	295	mr = address_space_translate(as, addr, &addr, &l, false, attrs);
	296	if (!(memory_region_is_ram(mr)
	297	\|\| memory_region_is_romd(mr))) {
	298	return;
	299	}
	300	ram_addr = memory_region_get_ram_addr(mr) + addr;
d6d1fd29	301	tb_invalidate_phys_page(ram_addr);
d9f24bf5	302	}
d9f24bf5 PB	303	#endif
	304
	305	/* Add a breakpoint. */
	306	int cpu_breakpoint_insert(CPUState *cpu, vaddr pc, int flags,
	307	CPUBreakpoint **breakpoint)
	308	{
5bc31e94	309	CPUClass *cc = CPU_GET_CLASS(cpu);
d9f24bf5 PB	310	CPUBreakpoint *bp;
d9f24bf5 PB	311
5bc31e94 RH	312	if (cc->gdb_adjust_breakpoint) {
	313	pc = cc->gdb_adjust_breakpoint(cpu, pc);
	314	}
	315
d9f24bf5 PB	316	bp = g_malloc(sizeof(*bp));
	317
	318	bp->pc = pc;
	319	bp->flags = flags;
	320
	321	/* keep all GDB-injected breakpoints in front */
	322	if (flags & BP_GDB) {
	323	QTAILQ_INSERT_HEAD(&cpu->breakpoints, bp, entry);
	324	} else {
	325	QTAILQ_INSERT_TAIL(&cpu->breakpoints, bp, entry);
	326	}
	327
d9f24bf5 PB	328	if (breakpoint) {
	329	*breakpoint = bp;
	330	}
ad1a706f RH	331
ad1a706f RH	332	trace_breakpoint_insert(cpu->cpu_index, pc, flags);
d9f24bf5 PB	333	return 0;
	334	}
	335
	336	/* Remove a specific breakpoint. */
	337	int cpu_breakpoint_remove(CPUState *cpu, vaddr pc, int flags)
	338	{
5bc31e94	339	CPUClass *cc = CPU_GET_CLASS(cpu);
d9f24bf5 PB	340	CPUBreakpoint *bp;
d9f24bf5 PB	341
5bc31e94 RH	342	if (cc->gdb_adjust_breakpoint) {
	343	pc = cc->gdb_adjust_breakpoint(cpu, pc);
	344	}
	345
d9f24bf5 PB	346	QTAILQ_FOREACH(bp, &cpu->breakpoints, entry) {
	347	if (bp->pc == pc && bp->flags == flags) {
	348	cpu_breakpoint_remove_by_ref(cpu, bp);
	349	return 0;
	350	}
	351	}
	352	return -ENOENT;
	353	}
	354
	355	/* Remove a specific breakpoint by reference. */
ad1a706f	356	void cpu_breakpoint_remove_by_ref(CPUState cpu, CPUBreakpoint bp)
d9f24bf5	357	{
ad1a706f	358	QTAILQ_REMOVE(&cpu->breakpoints, bp, entry);
d9f24bf5	359
ad1a706f RH	360	trace_breakpoint_remove(cpu->cpu_index, bp->pc, bp->flags);
ad1a706f RH	361	g_free(bp);
d9f24bf5 PB	362	}
	363
	364	/* Remove all matching breakpoints. */
	365	void cpu_breakpoint_remove_all(CPUState *cpu, int mask)
	366	{
	367	CPUBreakpoint bp, next;
	368
	369	QTAILQ_FOREACH_SAFE(bp, &cpu->breakpoints, entry, next) {
	370	if (bp->flags & mask) {
	371	cpu_breakpoint_remove_by_ref(cpu, bp);
	372	}
	373	}
	374	}
	375
	376	/* enable or disable single step mode. EXCP_DEBUG is returned by the
	377	CPU loop after each instruction */
	378	void cpu_single_step(CPUState *cpu, int enabled)
	379	{
	380	if (cpu->singlestep_enabled != enabled) {
	381	cpu->singlestep_enabled = enabled;
	382	if (kvm_enabled()) {
	383	kvm_update_guest_debug(cpu, 0);
d9f24bf5	384	}
ad1a706f	385	trace_breakpoint_singlestep(cpu->cpu_index, enabled);
d9f24bf5 PB	386	}
	387	}
	388
	389	void cpu_abort(CPUState cpu, const char fmt, ...)
	390	{
	391	va_list ap;
	392	va_list ap2;
	393
	394	va_start(ap, fmt);
	395	va_copy(ap2, ap);
	396	fprintf(stderr, "qemu: fatal: ");
	397	vfprintf(stderr, fmt, ap);
	398	fprintf(stderr, "\n");
	399	cpu_dump_state(cpu, stderr, CPU_DUMP_FPU \| CPU_DUMP_CCOP);
	400	if (qemu_log_separate()) {
c60f599b	401	FILE *logfile = qemu_log_trylock();
78b54858 RH	402	if (logfile) {
	403	fprintf(logfile, "qemu: fatal: ");
	404	vfprintf(logfile, fmt, ap2);
	405	fprintf(logfile, "\n");
	406	cpu_dump_state(cpu, logfile, CPU_DUMP_FPU \| CPU_DUMP_CCOP);
78b54858 RH	407	qemu_log_unlock(logfile);
78b54858 RH	408	}
d9f24bf5 PB	409	}
	410	va_end(ap2);
	411	va_end(ap);
	412	replay_finish();
	413	#if defined(CONFIG_USER_ONLY)
	414	{
	415	struct sigaction act;
	416	sigfillset(&act.sa_mask);
	417	act.sa_handler = SIG_DFL;
	418	act.sa_flags = 0;
	419	sigaction(SIGABRT, &act, NULL);
	420	}
	421	#endif
	422	abort();
	423	}
	424
	425	/* physical memory access (slow version, mainly for debug) */
	426	#if defined(CONFIG_USER_ONLY)
73842ef0 PMD	427	int cpu_memory_rw_debug(CPUState *cpu, vaddr addr,
73842ef0 PMD	428	void *ptr, size_t len, bool is_write)
d9f24bf5 PB	429	{
d9f24bf5 PB	430	int flags;
73842ef0	431	vaddr l, page;
d9f24bf5 PB	432	void * p;
	433	uint8_t *buf = ptr;
	434
	435	while (len > 0) {
	436	page = addr & TARGET_PAGE_MASK;
	437	l = (page + TARGET_PAGE_SIZE) - addr;
	438	if (l > len)
	439	l = len;
	440	flags = page_get_flags(page);
	441	if (!(flags & PAGE_VALID))
	442	return -1;
	443	if (is_write) {
	444	if (!(flags & PAGE_WRITE))
	445	return -1;
	446	/* XXX: this code should not depend on lock_user */
	447	if (!(p = lock_user(VERIFY_WRITE, addr, l, 0)))
	448	return -1;
	449	memcpy(p, buf, l);
	450	unlock_user(p, addr, l);
	451	} else {
	452	if (!(flags & PAGE_READ))
	453	return -1;
	454	/* XXX: this code should not depend on lock_user */
	455	if (!(p = lock_user(VERIFY_READ, addr, l, 1)))
	456	return -1;
	457	memcpy(buf, p, l);
	458	unlock_user(p, addr, 0);
	459	}
	460	len -= l;
	461	buf += l;
	462	addr += l;
	463	}
	464	return 0;
	465	}
	466	#endif
	467
	468	bool target_words_bigendian(void)
	469	{
ee3eb3a7	470	#if TARGET_BIG_ENDIAN
d9f24bf5 PB	471	return true;
	472	#else
	473	return false;
	474	#endif
	475	}
	476
	477	void page_size_init(void)
	478	{
	479	/* NOTE: we can always suppose that qemu_host_page_size >=
	480	TARGET_PAGE_SIZE */
	481	if (qemu_host_page_size == 0) {
8e3b0cbb	482	qemu_host_page_size = qemu_real_host_page_size();
d9f24bf5 PB	483	}
	484	if (qemu_host_page_size < TARGET_PAGE_SIZE) {
	485	qemu_host_page_size = TARGET_PAGE_SIZE;
	486	}
	487	qemu_host_page_mask = -(intptr_t)qemu_host_page_size;
	488	}