[qemu.git] / hw / s390x / s390-stattrib.c

/*
 * s390 storage attributes device
 *
 * Copyright 2016 IBM Corp.
 * Author(s): Claudio Imbrenda <[email protected]>
 *
 * This work is licensed under the terms of the GNU GPL, version 2 or (at
 * your option) any later version. See the COPYING file in the top-level
 * directory.
 */

#include "qemu/osdep.h"
#include "qemu/units.h"
#include "hw/boards.h"
#include "cpu.h"
#include "migration/qemu-file.h"
#include "migration/register.h"
#include "hw/s390x/storage-attributes.h"
#include "qemu/error-report.h"
#include "exec/ram_addr.h"
#include "qapi/error.h"
#include "qapi/qmp/qdict.h"

/* 512KiB cover 2GB of guest memory */
#define CMMA_BLOCK_SIZE  (512 * KiB)

#define STATTR_FLAG_EOS     0x01ULL
#define STATTR_FLAG_MORE    0x02ULL
#define STATTR_FLAG_ERROR   0x04ULL
#define STATTR_FLAG_DONE    0x08ULL

static S390StAttribState *s390_get_stattrib_device(void)
{
    S390StAttribState *sas;

    sas = S390_STATTRIB(object_resolve_path_type("", TYPE_S390_STATTRIB, NULL));
    assert(sas);
    return sas;
}

void s390_stattrib_init(void)
{
    Object *obj;

    obj = kvm_s390_stattrib_create();
    if (!obj) {
        obj = object_new(TYPE_QEMU_S390_STATTRIB);
    }

    object_property_add_child(qdev_get_machine(), TYPE_S390_STATTRIB,
                              obj, NULL);
    object_unref(obj);

    qdev_init_nofail(DEVICE(obj));
}

/* Console commands: */

void hmp_migrationmode(Monitor *mon, const QDict *qdict)
{
    S390StAttribState *sas = s390_get_stattrib_device();
    S390StAttribClass *sac = S390_STATTRIB_GET_CLASS(sas);
    uint64_t what = qdict_get_int(qdict, "mode");
    int r;

    r = sac->set_migrationmode(sas, what);
    if (r < 0) {
        monitor_printf(mon, "Error: %s", strerror(-r));
    }
}

void hmp_info_cmma(Monitor *mon, const QDict *qdict)
{
    S390StAttribState *sas = s390_get_stattrib_device();
    S390StAttribClass *sac = S390_STATTRIB_GET_CLASS(sas);
    uint64_t addr = qdict_get_int(qdict, "addr");
    uint64_t buflen = qdict_get_try_int(qdict, "count", 8);
    uint8_t *vals;
    int cx, len;

    vals = g_try_malloc(buflen);
    if (!vals) {
        monitor_printf(mon, "Error: %s\n", strerror(errno));
        return;
    }

    len = sac->peek_stattr(sas, addr / TARGET_PAGE_SIZE, buflen, vals);
    if (len < 0) {
        monitor_printf(mon, "Error: %s", strerror(-len));
        goto out;
    }

    monitor_printf(mon, "  CMMA attributes, "
                   "pages %" PRIu64 "+%d (0x%" PRIx64 "):\n",
                   addr / TARGET_PAGE_SIZE, len, addr & ~TARGET_PAGE_MASK);
    for (cx = 0; cx < len; cx++) {
        if (cx % 8 == 7) {
            monitor_printf(mon, "%02x\n", vals[cx]);
        } else {
            monitor_printf(mon, "%02x", vals[cx]);
        }
    }
    monitor_printf(mon, "\n");

out:
    g_free(vals);
}

/* Migration support: */

static int cmma_load(QEMUFile *f, void *opaque, int version_id)
{
    S390StAttribState *sas = S390_STATTRIB(opaque);
    S390StAttribClass *sac = S390_STATTRIB_GET_CLASS(sas);
    uint64_t count, cur_gfn;
    int flags, ret = 0;
    ram_addr_t addr;
    uint8_t *buf;

    while (!ret) {
        addr = qemu_get_be64(f);
        flags = addr & ~TARGET_PAGE_MASK;
        addr &= TARGET_PAGE_MASK;

        switch (flags) {
        case STATTR_FLAG_MORE: {
            cur_gfn = addr / TARGET_PAGE_SIZE;
            count = qemu_get_be64(f);
            buf = g_try_malloc(count);
            if (!buf) {
                error_report("cmma_load could not allocate memory");
                ret = -ENOMEM;
                break;
            }

            qemu_get_buffer(f, buf, count);
            ret = sac->set_stattr(sas, cur_gfn, count, buf);
            if (ret < 0) {
                error_report("Error %d while setting storage attributes", ret);
            }
            g_free(buf);
            break;
        }
        case STATTR_FLAG_ERROR: {
            error_report("Storage attributes data is incomplete");
            ret = -EINVAL;
            break;
        }
        case STATTR_FLAG_DONE:
            /* This is after the last pre-copied value has been sent, nothing
             * more will be sent after this. Pre-copy has finished, and we
             * are done flushing all the remaining values. Now the target
             * system is about to take over. We synchronize the buffer to
             * apply the actual correct values where needed.
             */
             sac->synchronize(sas);
            break;
        case STATTR_FLAG_EOS:
            /* Normal exit */
            return 0;
        default:
            error_report("Unexpected storage attribute flag data: %#x", flags);
            ret = -EINVAL;
        }
    }

    return ret;
}

static int cmma_save_setup(QEMUFile *f, void *opaque)
{
    S390StAttribState *sas = S390_STATTRIB(opaque);
    S390StAttribClass *sac = S390_STATTRIB_GET_CLASS(sas);
    int res;
    /*
     * Signal that we want to start a migration, thus needing PGSTE dirty
     * tracking.
     */
    res = sac->set_migrationmode(sas, 1);
    if (res) {
        return res;
    }
    qemu_put_be64(f, STATTR_FLAG_EOS);
    return 0;
}

static void cmma_save_pending(QEMUFile *f, void *opaque, uint64_t max_size,
                              uint64_t *res_precopy_only,
                              uint64_t *res_compatible,
                              uint64_t *res_postcopy_only)
{
    S390StAttribState *sas = S390_STATTRIB(opaque);
    S390StAttribClass *sac = S390_STATTRIB_GET_CLASS(sas);
    long long res = sac->get_dirtycount(sas);

    if (res >= 0) {
        *res_precopy_only += res;
    }
}

static int cmma_save(QEMUFile *f, void *opaque, int final)
{
    S390StAttribState *sas = S390_STATTRIB(opaque);
    S390StAttribClass *sac = S390_STATTRIB_GET_CLASS(sas);
    uint8_t *buf;
    int r, cx, reallen = 0, ret = 0;
    uint32_t buflen = CMMA_BLOCK_SIZE;
    uint64_t start_gfn = sas->migration_cur_gfn;

    buf = g_try_malloc(buflen);
    if (!buf) {
        error_report("Could not allocate memory to save storage attributes");
        return -ENOMEM;
    }

    while (final ? 1 : qemu_file_rate_limit(f) == 0) {
        reallen = sac->get_stattr(sas, &start_gfn, buflen, buf);
        if (reallen < 0) {
            g_free(buf);
            return reallen;
        }

        ret = 1;
        if (!reallen) {
            break;
        }
        qemu_put_be64(f, (start_gfn << TARGET_PAGE_BITS) | STATTR_FLAG_MORE);
        qemu_put_be64(f, reallen);
        for (cx = 0; cx < reallen; cx++) {
            qemu_put_byte(f, buf[cx]);
        }
        if (!sac->get_dirtycount(sas)) {
            break;
        }
    }

    sas->migration_cur_gfn = start_gfn + reallen;
    g_free(buf);
    if (final) {
        qemu_put_be64(f, STATTR_FLAG_DONE);
    }
    qemu_put_be64(f, STATTR_FLAG_EOS);

    r = qemu_file_get_error(f);
    if (r < 0) {
        return r;
    }

    return ret;
}

static int cmma_save_iterate(QEMUFile *f, void *opaque)
{
    return cmma_save(f, opaque, 0);
}

static int cmma_save_complete(QEMUFile *f, void *opaque)
{
    return cmma_save(f, opaque, 1);
}

static void cmma_save_cleanup(void *opaque)
{
    S390StAttribState *sas = S390_STATTRIB(opaque);
    S390StAttribClass *sac = S390_STATTRIB_GET_CLASS(sas);
    sac->set_migrationmode(sas, 0);
}

static bool cmma_active(void *opaque)
{
    S390StAttribState *sas = S390_STATTRIB(opaque);
    S390StAttribClass *sac = S390_STATTRIB_GET_CLASS(sas);
    return sac->get_active(sas);
}

/* QEMU object: */

static void qemu_s390_stattrib_instance_init(Object *obj)
{
}

static int qemu_s390_peek_stattr_stub(S390StAttribState *sa, uint64_t start_gfn,
                                     uint32_t count, uint8_t *values)
{
    return 0;
}
static void qemu_s390_synchronize_stub(S390StAttribState *sa)
{
}
static int qemu_s390_get_stattr_stub(S390StAttribState *sa, uint64_t *start_gfn,
                                     uint32_t count, uint8_t *values)
{
    return 0;
}
static long long qemu_s390_get_dirtycount_stub(S390StAttribState *sa)
{
    return 0;
}
static int qemu_s390_set_migrationmode_stub(S390StAttribState *sa, bool value)
{
    return 0;
}

static int qemu_s390_get_active(S390StAttribState *sa)
{
    return sa->migration_enabled;
}

static void qemu_s390_stattrib_class_init(ObjectClass *oc, void *data)
{
    S390StAttribClass *sa_cl = S390_STATTRIB_CLASS(oc);
    DeviceClass *dc = DEVICE_CLASS(oc);

    sa_cl->synchronize = qemu_s390_synchronize_stub;
    sa_cl->get_stattr = qemu_s390_get_stattr_stub;
    sa_cl->set_stattr = qemu_s390_peek_stattr_stub;
    sa_cl->peek_stattr = qemu_s390_peek_stattr_stub;
    sa_cl->set_migrationmode = qemu_s390_set_migrationmode_stub;
    sa_cl->get_dirtycount = qemu_s390_get_dirtycount_stub;
    sa_cl->get_active = qemu_s390_get_active;

    /* Reason: Can only be instantiated one time (internally) */
    dc->user_creatable = false;
}

static const TypeInfo qemu_s390_stattrib_info = {
    .name          = TYPE_QEMU_S390_STATTRIB,
    .parent        = TYPE_S390_STATTRIB,
    .instance_init = qemu_s390_stattrib_instance_init,
    .instance_size = sizeof(QEMUS390StAttribState),
    .class_init    = qemu_s390_stattrib_class_init,
    .class_size    = sizeof(S390StAttribClass),
};

/* Generic abstract object: */

static void s390_stattrib_realize(DeviceState *dev, Error **errp)
{
    bool ambiguous = false;

    object_resolve_path_type("", TYPE_S390_STATTRIB, &ambiguous);
    if (ambiguous) {
        error_setg(errp, "storage_attributes device already exists");
    }
}

static void s390_stattrib_class_init(ObjectClass *oc, void *data)
{
    DeviceClass *dc = DEVICE_CLASS(oc);

    dc->hotpluggable = false;
    set_bit(DEVICE_CATEGORY_MISC, dc->categories);
    dc->realize = s390_stattrib_realize;
}

static inline bool s390_stattrib_get_migration_enabled(Object *obj, Error **e)
{
    S390StAttribState *s = S390_STATTRIB(obj);

    return s->migration_enabled;
}

static inline void s390_stattrib_set_migration_enabled(Object *obj, bool value,
                                            Error **errp)
{
    S390StAttribState *s = S390_STATTRIB(obj);

    s->migration_enabled = value;
}

static SaveVMHandlers savevm_s390_stattrib_handlers = {
    .save_setup = cmma_save_setup,
    .save_live_iterate = cmma_save_iterate,
    .save_live_complete_precopy = cmma_save_complete,
    .save_live_pending = cmma_save_pending,
    .save_cleanup = cmma_save_cleanup,
    .load_state = cmma_load,
    .is_active = cmma_active,
};

static void s390_stattrib_instance_init(Object *obj)
{
    S390StAttribState *sas = S390_STATTRIB(obj);

    register_savevm_live(NULL, TYPE_S390_STATTRIB, 0, 0,
                         &savevm_s390_stattrib_handlers, sas);

    object_property_add_bool(obj, "migration-enabled",
                             s390_stattrib_get_migration_enabled,
                             s390_stattrib_set_migration_enabled, NULL);
    object_property_set_bool(obj, true, "migration-enabled", NULL);
    sas->migration_cur_gfn = 0;
}

static const TypeInfo s390_stattrib_info = {
    .name          = TYPE_S390_STATTRIB,
    .parent        = TYPE_DEVICE,
    .instance_init = s390_stattrib_instance_init,
    .instance_size = sizeof(S390StAttribState),
    .class_init    = s390_stattrib_class_init,
    .class_size    = sizeof(S390StAttribClass),
    .abstract      = true,
};

static void s390_stattrib_register_types(void)
{
    type_register_static(&s390_stattrib_info);
    type_register_static(&qemu_s390_stattrib_info);
}

type_init(s390_stattrib_register_types)
Commit	Line	Data
903fd80b CI	1	/*
	2	* s390 storage attributes device
	3	*
	4	* Copyright 2016 IBM Corp.
	5	* Author(s): Claudio Imbrenda <[email protected]>
	6	*
	7	* This work is licensed under the terms of the GNU GPL, version 2 or (at
	8	* your option) any later version. See the COPYING file in the top-level
	9	* directory.
	10	*/
	11
	12	#include "qemu/osdep.h"
393fc4c7	13	#include "qemu/units.h"
903fd80b	14	#include "hw/boards.h"
e654ca84	15	#include "cpu.h"
903fd80b CI	16	#include "migration/qemu-file.h"
	17	#include "migration/register.h"
	18	#include "hw/s390x/storage-attributes.h"
	19	#include "qemu/error-report.h"
903fd80b CI	20	#include "exec/ram_addr.h"
903fd80b CI	21	#include "qapi/error.h"
452fcdbc	22	#include "qapi/qmp/qdict.h"
903fd80b	23
17f45666 CI	24	/* 512KiB cover 2GB of guest memory */
17f45666 CI	25	#define CMMA_BLOCK_SIZE (512 * KiB)
903fd80b CI	26
	27	#define STATTR_FLAG_EOS 0x01ULL
	28	#define STATTR_FLAG_MORE 0x02ULL
	29	#define STATTR_FLAG_ERROR 0x04ULL
	30	#define STATTR_FLAG_DONE 0x08ULL
	31
f860d497 CI	32	static S390StAttribState *s390_get_stattrib_device(void)
	33	{
	34	S390StAttribState *sas;
	35
	36	sas = S390_STATTRIB(object_resolve_path_type("", TYPE_S390_STATTRIB, NULL));
	37	assert(sas);
	38	return sas;
	39	}
	40
903fd80b CI	41	void s390_stattrib_init(void)
	42	{
	43	Object *obj;
	44
	45	obj = kvm_s390_stattrib_create();
	46	if (!obj) {
	47	obj = object_new(TYPE_QEMU_S390_STATTRIB);
	48	}
	49
	50	object_property_add_child(qdev_get_machine(), TYPE_S390_STATTRIB,
	51	obj, NULL);
	52	object_unref(obj);
	53
	54	qdev_init_nofail(DEVICE(obj));
	55	}
	56
f860d497 CI	57	/* Console commands: */
	58
	59	void hmp_migrationmode(Monitor mon, const QDict qdict)
	60	{
	61	S390StAttribState *sas = s390_get_stattrib_device();
	62	S390StAttribClass *sac = S390_STATTRIB_GET_CLASS(sas);
	63	uint64_t what = qdict_get_int(qdict, "mode");
	64	int r;
	65
	66	r = sac->set_migrationmode(sas, what);
	67	if (r < 0) {
	68	monitor_printf(mon, "Error: %s", strerror(-r));
	69	}
	70	}
	71
	72	void hmp_info_cmma(Monitor mon, const QDict qdict)
	73	{
	74	S390StAttribState *sas = s390_get_stattrib_device();
	75	S390StAttribClass *sac = S390_STATTRIB_GET_CLASS(sas);
	76	uint64_t addr = qdict_get_int(qdict, "addr");
	77	uint64_t buflen = qdict_get_try_int(qdict, "count", 8);
	78	uint8_t *vals;
	79	int cx, len;
	80
	81	vals = g_try_malloc(buflen);
	82	if (!vals) {
	83	monitor_printf(mon, "Error: %s\n", strerror(errno));
	84	return;
	85	}
	86
	87	len = sac->peek_stattr(sas, addr / TARGET_PAGE_SIZE, buflen, vals);
	88	if (len < 0) {
	89	monitor_printf(mon, "Error: %s", strerror(-len));
	90	goto out;
	91	}
	92
	93	monitor_printf(mon, " CMMA attributes, "
	94	"pages %" PRIu64 "+%d (0x%" PRIx64 "):\n",
	95	addr / TARGET_PAGE_SIZE, len, addr & ~TARGET_PAGE_MASK);
	96	for (cx = 0; cx < len; cx++) {
	97	if (cx % 8 == 7) {
	98	monitor_printf(mon, "%02x\n", vals[cx]);
	99	} else {
	100	monitor_printf(mon, "%02x", vals[cx]);
	101	}
	102	}
	103	monitor_printf(mon, "\n");
	104
	105	out:
	106	g_free(vals);
	107	}
	108
903fd80b CI	109	/* Migration support: */
	110
	111	static int cmma_load(QEMUFile f, void opaque, int version_id)
	112	{
	113	S390StAttribState *sas = S390_STATTRIB(opaque);
	114	S390StAttribClass *sac = S390_STATTRIB_GET_CLASS(sas);
	115	uint64_t count, cur_gfn;
	116	int flags, ret = 0;
	117	ram_addr_t addr;
	118	uint8_t *buf;
	119
	120	while (!ret) {
	121	addr = qemu_get_be64(f);
	122	flags = addr & ~TARGET_PAGE_MASK;
	123	addr &= TARGET_PAGE_MASK;
	124
	125	switch (flags) {
	126	case STATTR_FLAG_MORE: {
	127	cur_gfn = addr / TARGET_PAGE_SIZE;
	128	count = qemu_get_be64(f);
	129	buf = g_try_malloc(count);
	130	if (!buf) {
	131	error_report("cmma_load could not allocate memory");
	132	ret = -ENOMEM;
	133	break;
	134	}
	135
	136	qemu_get_buffer(f, buf, count);
	137	ret = sac->set_stattr(sas, cur_gfn, count, buf);
	138	if (ret < 0) {
	139	error_report("Error %d while setting storage attributes", ret);
	140	}
	141	g_free(buf);
	142	break;
	143	}
	144	case STATTR_FLAG_ERROR: {
	145	error_report("Storage attributes data is incomplete");
	146	ret = -EINVAL;
	147	break;
	148	}
	149	case STATTR_FLAG_DONE:
	150	/* This is after the last pre-copied value has been sent, nothing
	151	* more will be sent after this. Pre-copy has finished, and we
	152	* are done flushing all the remaining values. Now the target
	153	* system is about to take over. We synchronize the buffer to
	154	* apply the actual correct values where needed.
	155	*/
	156	sac->synchronize(sas);
	157	break;
	158	case STATTR_FLAG_EOS:
	159	/* Normal exit */
	160	return 0;
	161	default:
	162	error_report("Unexpected storage attribute flag data: %#x", flags);
	163	ret = -EINVAL;
	164	}
	165	}
	166
	167	return ret;
	168	}
	169
	170	static int cmma_save_setup(QEMUFile f, void opaque)
	171	{
	172	S390StAttribState *sas = S390_STATTRIB(opaque);
173	S390StAttribClass *sac = S390_STATTRIB_GET_CLASS(sas);
174	int res;
175	/*
176	* Signal that we want to start a migration, thus needing PGSTE dirty
177	* tracking.
178	*/
179	res = sac->set_migrationmode(sas, 1);
180	if (res) {
181	return res;
182	}
183	qemu_put_be64(f, STATTR_FLAG_EOS);
184	return 0;
185	}
186
187	static void cmma_save_pending(QEMUFile f, void opaque, uint64_t max_size,
47995026 VSO	188	uint64_t *res_precopy_only,
	189	uint64_t *res_compatible,
	190	uint64_t *res_postcopy_only)
903fd80b CI	191	{
	192	S390StAttribState *sas = S390_STATTRIB(opaque);
	193	S390StAttribClass *sac = S390_STATTRIB_GET_CLASS(sas);
	194	long long res = sac->get_dirtycount(sas);
	195
	196	if (res >= 0) {
47995026	197	*res_precopy_only += res;
903fd80b CI	198	}
	199	}
	200
	201	static int cmma_save(QEMUFile f, void opaque, int final)
	202	{
	203	S390StAttribState *sas = S390_STATTRIB(opaque);
	204	S390StAttribClass *sac = S390_STATTRIB_GET_CLASS(sas);
	205	uint8_t *buf;
	206	int r, cx, reallen = 0, ret = 0;
17f45666	207	uint32_t buflen = CMMA_BLOCK_SIZE;
903fd80b CI	208	uint64_t start_gfn = sas->migration_cur_gfn;
	209
	210	buf = g_try_malloc(buflen);
	211	if (!buf) {
	212	error_report("Could not allocate memory to save storage attributes");
	213	return -ENOMEM;
	214	}
	215
	216	while (final ? 1 : qemu_file_rate_limit(f) == 0) {
	217	reallen = sac->get_stattr(sas, &start_gfn, buflen, buf);
	218	if (reallen < 0) {
	219	g_free(buf);
	220	return reallen;
	221	}
	222
	223	ret = 1;
	224	if (!reallen) {
	225	break;
	226	}
	227	qemu_put_be64(f, (start_gfn << TARGET_PAGE_BITS) \| STATTR_FLAG_MORE);
	228	qemu_put_be64(f, reallen);
	229	for (cx = 0; cx < reallen; cx++) {
	230	qemu_put_byte(f, buf[cx]);
	231	}
	232	if (!sac->get_dirtycount(sas)) {
	233	break;
	234	}
	235	}
	236
	237	sas->migration_cur_gfn = start_gfn + reallen;
	238	g_free(buf);
	239	if (final) {
	240	qemu_put_be64(f, STATTR_FLAG_DONE);
	241	}
	242	qemu_put_be64(f, STATTR_FLAG_EOS);
	243
	244	r = qemu_file_get_error(f);
	245	if (r < 0) {
	246	return r;
	247	}
	248
	249	return ret;
	250	}
	251
	252	static int cmma_save_iterate(QEMUFile f, void opaque)
	253	{
	254	return cmma_save(f, opaque, 0);
	255	}
	256
	257	static int cmma_save_complete(QEMUFile f, void opaque)
	258	{
	259	return cmma_save(f, opaque, 1);
	260	}
	261
	262	static void cmma_save_cleanup(void *opaque)
	263	{
	264	S390StAttribState *sas = S390_STATTRIB(opaque);
	265	S390StAttribClass *sac = S390_STATTRIB_GET_CLASS(sas);
	266	sac->set_migrationmode(sas, 0);
	267	}
	268
	269	static bool cmma_active(void *opaque)
	270	{
	271	S390StAttribState *sas = S390_STATTRIB(opaque);
272	S390StAttribClass *sac = S390_STATTRIB_GET_CLASS(sas);
273	return sac->get_active(sas);
274	}
275
276	/* QEMU object: */
277
278	static void qemu_s390_stattrib_instance_init(Object *obj)
279	{
280	}
281
282	static int qemu_s390_peek_stattr_stub(S390StAttribState *sa, uint64_t start_gfn,
283	uint32_t count, uint8_t *values)
284	{
285	return 0;
286	}
287	static void qemu_s390_synchronize_stub(S390StAttribState *sa)
288	{
289	}
290	static int qemu_s390_get_stattr_stub(S390StAttribState sa, uint64_t start_gfn,
291	uint32_t count, uint8_t *values)
292	{
293	return 0;
294	}
295	static long long qemu_s390_get_dirtycount_stub(S390StAttribState *sa)
296	{
297	return 0;
298	}
299	static int qemu_s390_set_migrationmode_stub(S390StAttribState *sa, bool value)
300	{
301	return 0;
302	}
303
304	static int qemu_s390_get_active(S390StAttribState *sa)
305	{
306	return sa->migration_enabled;
307	}
308
309	static void qemu_s390_stattrib_class_init(ObjectClass oc, void data)
310	{
311	S390StAttribClass *sa_cl = S390_STATTRIB_CLASS(oc);
3ea6d20e	312	DeviceClass *dc = DEVICE_CLASS(oc);
903fd80b CI	313
	314	sa_cl->synchronize = qemu_s390_synchronize_stub;
	315	sa_cl->get_stattr = qemu_s390_get_stattr_stub;
	316	sa_cl->set_stattr = qemu_s390_peek_stattr_stub;
	317	sa_cl->peek_stattr = qemu_s390_peek_stattr_stub;
	318	sa_cl->set_migrationmode = qemu_s390_set_migrationmode_stub;
	319	sa_cl->get_dirtycount = qemu_s390_get_dirtycount_stub;
	320	sa_cl->get_active = qemu_s390_get_active;
3ea6d20e TH	321
	322	/* Reason: Can only be instantiated one time (internally) */
	323	dc->user_creatable = false;
903fd80b CI	324	}
	325
	326	static const TypeInfo qemu_s390_stattrib_info = {
	327	.name = TYPE_QEMU_S390_STATTRIB,
	328	.parent = TYPE_S390_STATTRIB,
	329	.instance_init = qemu_s390_stattrib_instance_init,
	330	.instance_size = sizeof(QEMUS390StAttribState),
	331	.class_init = qemu_s390_stattrib_class_init,
	332	.class_size = sizeof(S390StAttribClass),
	333	};
	334
	335	/* Generic abstract object: */
	336
	337	static void s390_stattrib_realize(DeviceState dev, Error *errp)
	338	{
	339	bool ambiguous = false;
	340
	341	object_resolve_path_type("", TYPE_S390_STATTRIB, &ambiguous);
	342	if (ambiguous) {
	343	error_setg(errp, "storage_attributes device already exists");
	344	}
	345	}
	346
	347	static void s390_stattrib_class_init(ObjectClass oc, void data)
	348	{
	349	DeviceClass *dc = DEVICE_CLASS(oc);
	350
	351	dc->hotpluggable = false;
	352	set_bit(DEVICE_CATEGORY_MISC, dc->categories);
	353	dc->realize = s390_stattrib_realize;
	354	}
	355
	356	static inline bool s390_stattrib_get_migration_enabled(Object obj, Error *e)
	357	{
	358	S390StAttribState *s = S390_STATTRIB(obj);
	359
	360	return s->migration_enabled;
	361	}
	362
	363	static inline void s390_stattrib_set_migration_enabled(Object *obj, bool value,
	364	Error **errp)
	365	{
	366	S390StAttribState *s = S390_STATTRIB(obj);
	367
	368	s->migration_enabled = value;
	369	}
	370
571729a0 DDAG	371	static SaveVMHandlers savevm_s390_stattrib_handlers = {
	372	.save_setup = cmma_save_setup,
	373	.save_live_iterate = cmma_save_iterate,
	374	.save_live_complete_precopy = cmma_save_complete,
	375	.save_live_pending = cmma_save_pending,
	376	.save_cleanup = cmma_save_cleanup,
	377	.load_state = cmma_load,
	378	.is_active = cmma_active,
	379	};
	380
903fd80b CI	381	static void s390_stattrib_instance_init(Object *obj)
	382	{
	383	S390StAttribState *sas = S390_STATTRIB(obj);
571729a0 DDAG	384
	385	register_savevm_live(NULL, TYPE_S390_STATTRIB, 0, 0,
	386	&savevm_s390_stattrib_handlers, sas);
903fd80b CI	387
	388	object_property_add_bool(obj, "migration-enabled",
	389	s390_stattrib_get_migration_enabled,
	390	s390_stattrib_set_migration_enabled, NULL);
	391	object_property_set_bool(obj, true, "migration-enabled", NULL);
	392	sas->migration_cur_gfn = 0;
	393	}
	394
	395	static const TypeInfo s390_stattrib_info = {
	396	.name = TYPE_S390_STATTRIB,
	397	.parent = TYPE_DEVICE,
	398	.instance_init = s390_stattrib_instance_init,
	399	.instance_size = sizeof(S390StAttribState),
	400	.class_init = s390_stattrib_class_init,
	401	.class_size = sizeof(S390StAttribClass),
	402	.abstract = true,
	403	};
	404
	405	static void s390_stattrib_register_types(void)
	406	{
	407	type_register_static(&s390_stattrib_info);
	408	type_register_static(&qemu_s390_stattrib_info);
	409	}
	410
	411	type_init(s390_stattrib_register_types)