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12#include "qemu/osdep.h"
13#include "hw/boards.h"
14#include "cpu.h"
15#include "qmp-commands.h"
16#include "migration/qemu-file.h"
17#include "migration/register.h"
18#include "hw/s390x/storage-attributes.h"
19#include "qemu/error-report.h"
20#include "exec/ram_addr.h"
21#include "qapi/error.h"
22
23#define CMMA_BLOCK_SIZE (1 << 10)
24
25#define STATTR_FLAG_EOS 0x01ULL
26#define STATTR_FLAG_MORE 0x02ULL
27#define STATTR_FLAG_ERROR 0x04ULL
28#define STATTR_FLAG_DONE 0x08ULL
29
30static S390StAttribState *s390_get_stattrib_device(void)
31{
32 S390StAttribState *sas;
33
34 sas = S390_STATTRIB(object_resolve_path_type("", TYPE_S390_STATTRIB, NULL));
35 assert(sas);
36 return sas;
37}
38
39void s390_stattrib_init(void)
40{
41 Object *obj;
42
43 obj = kvm_s390_stattrib_create();
44 if (!obj) {
45 obj = object_new(TYPE_QEMU_S390_STATTRIB);
46 }
47
48 object_property_add_child(qdev_get_machine(), TYPE_S390_STATTRIB,
49 obj, NULL);
50 object_unref(obj);
51
52 qdev_init_nofail(DEVICE(obj));
53}
54
55
56
57void hmp_migrationmode(Monitor *mon, const QDict *qdict)
58{
59 S390StAttribState *sas = s390_get_stattrib_device();
60 S390StAttribClass *sac = S390_STATTRIB_GET_CLASS(sas);
61 uint64_t what = qdict_get_int(qdict, "mode");
62 int r;
63
64 r = sac->set_migrationmode(sas, what);
65 if (r < 0) {
66 monitor_printf(mon, "Error: %s", strerror(-r));
67 }
68}
69
70void hmp_info_cmma(Monitor *mon, const QDict *qdict)
71{
72 S390StAttribState *sas = s390_get_stattrib_device();
73 S390StAttribClass *sac = S390_STATTRIB_GET_CLASS(sas);
74 uint64_t addr = qdict_get_int(qdict, "addr");
75 uint64_t buflen = qdict_get_try_int(qdict, "count", 8);
76 uint8_t *vals;
77 int cx, len;
78
79 vals = g_try_malloc(buflen);
80 if (!vals) {
81 monitor_printf(mon, "Error: %s\n", strerror(errno));
82 return;
83 }
84
85 len = sac->peek_stattr(sas, addr / TARGET_PAGE_SIZE, buflen, vals);
86 if (len < 0) {
87 monitor_printf(mon, "Error: %s", strerror(-len));
88 goto out;
89 }
90
91 monitor_printf(mon, " CMMA attributes, "
92 "pages %" PRIu64 "+%d (0x%" PRIx64 "):\n",
93 addr / TARGET_PAGE_SIZE, len, addr & ~TARGET_PAGE_MASK);
94 for (cx = 0; cx < len; cx++) {
95 if (cx % 8 == 7) {
96 monitor_printf(mon, "%02x\n", vals[cx]);
97 } else {
98 monitor_printf(mon, "%02x", vals[cx]);
99 }
100 }
101 monitor_printf(mon, "\n");
102
103out:
104 g_free(vals);
105}
106
107
108
109static int cmma_load(QEMUFile *f, void *opaque, int version_id)
110{
111 S390StAttribState *sas = S390_STATTRIB(opaque);
112 S390StAttribClass *sac = S390_STATTRIB_GET_CLASS(sas);
113 uint64_t count, cur_gfn;
114 int flags, ret = 0;
115 ram_addr_t addr;
116 uint8_t *buf;
117
118 while (!ret) {
119 addr = qemu_get_be64(f);
120 flags = addr & ~TARGET_PAGE_MASK;
121 addr &= TARGET_PAGE_MASK;
122
123 switch (flags) {
124 case STATTR_FLAG_MORE: {
125 cur_gfn = addr / TARGET_PAGE_SIZE;
126 count = qemu_get_be64(f);
127 buf = g_try_malloc(count);
128 if (!buf) {
129 error_report("cmma_load could not allocate memory");
130 ret = -ENOMEM;
131 break;
132 }
133
134 qemu_get_buffer(f, buf, count);
135 ret = sac->set_stattr(sas, cur_gfn, count, buf);
136 if (ret < 0) {
137 error_report("Error %d while setting storage attributes", ret);
138 }
139 g_free(buf);
140 break;
141 }
142 case STATTR_FLAG_ERROR: {
143 error_report("Storage attributes data is incomplete");
144 ret = -EINVAL;
145 break;
146 }
147 case STATTR_FLAG_DONE:
148
149
150
151
152
153
154 sac->synchronize(sas);
155 break;
156 case STATTR_FLAG_EOS:
157
158 return 0;
159 default:
160 error_report("Unexpected storage attribute flag data: %#x", flags);
161 ret = -EINVAL;
162 }
163 }
164
165 return ret;
166}
167
168static int cmma_save_setup(QEMUFile *f, void *opaque)
169{
170 S390StAttribState *sas = S390_STATTRIB(opaque);
171 S390StAttribClass *sac = S390_STATTRIB_GET_CLASS(sas);
172 int res;
173
174
175
176
177 res = sac->set_migrationmode(sas, 1);
178 if (res) {
179 return res;
180 }
181 qemu_put_be64(f, STATTR_FLAG_EOS);
182 return 0;
183}
184
185static void cmma_save_pending(QEMUFile *f, void *opaque, uint64_t max_size,
186 uint64_t *non_postcopiable_pending,
187 uint64_t *postcopiable_pending)
188{
189 S390StAttribState *sas = S390_STATTRIB(opaque);
190 S390StAttribClass *sac = S390_STATTRIB_GET_CLASS(sas);
191 long long res = sac->get_dirtycount(sas);
192
193 if (res >= 0) {
194 *non_postcopiable_pending += res;
195 }
196}
197
198static int cmma_save(QEMUFile *f, void *opaque, int final)
199{
200 S390StAttribState *sas = S390_STATTRIB(opaque);
201 S390StAttribClass *sac = S390_STATTRIB_GET_CLASS(sas);
202 uint8_t *buf;
203 int r, cx, reallen = 0, ret = 0;
204 uint32_t buflen = 1 << 19;
205 uint64_t start_gfn = sas->migration_cur_gfn;
206
207 buf = g_try_malloc(buflen);
208 if (!buf) {
209 error_report("Could not allocate memory to save storage attributes");
210 return -ENOMEM;
211 }
212
213 while (final ? 1 : qemu_file_rate_limit(f) == 0) {
214 reallen = sac->get_stattr(sas, &start_gfn, buflen, buf);
215 if (reallen < 0) {
216 g_free(buf);
217 return reallen;
218 }
219
220 ret = 1;
221 if (!reallen) {
222 break;
223 }
224 qemu_put_be64(f, (start_gfn << TARGET_PAGE_BITS) | STATTR_FLAG_MORE);
225 qemu_put_be64(f, reallen);
226 for (cx = 0; cx < reallen; cx++) {
227 qemu_put_byte(f, buf[cx]);
228 }
229 if (!sac->get_dirtycount(sas)) {
230 break;
231 }
232 }
233
234 sas->migration_cur_gfn = start_gfn + reallen;
235 g_free(buf);
236 if (final) {
237 qemu_put_be64(f, STATTR_FLAG_DONE);
238 }
239 qemu_put_be64(f, STATTR_FLAG_EOS);
240
241 r = qemu_file_get_error(f);
242 if (r < 0) {
243 return r;
244 }
245
246 return ret;
247}
248
249static int cmma_save_iterate(QEMUFile *f, void *opaque)
250{
251 return cmma_save(f, opaque, 0);
252}
253
254static int cmma_save_complete(QEMUFile *f, void *opaque)
255{
256 return cmma_save(f, opaque, 1);
257}
258
259static void cmma_save_cleanup(void *opaque)
260{
261 S390StAttribState *sas = S390_STATTRIB(opaque);
262 S390StAttribClass *sac = S390_STATTRIB_GET_CLASS(sas);
263 sac->set_migrationmode(sas, 0);
264}
265
266static bool cmma_active(void *opaque)
267{
268 S390StAttribState *sas = S390_STATTRIB(opaque);
269 S390StAttribClass *sac = S390_STATTRIB_GET_CLASS(sas);
270 return sac->get_active(sas);
271}
272
273
274
275static void qemu_s390_stattrib_instance_init(Object *obj)
276{
277}
278
279static int qemu_s390_peek_stattr_stub(S390StAttribState *sa, uint64_t start_gfn,
280 uint32_t count, uint8_t *values)
281{
282 return 0;
283}
284static void qemu_s390_synchronize_stub(S390StAttribState *sa)
285{
286}
287static int qemu_s390_get_stattr_stub(S390StAttribState *sa, uint64_t *start_gfn,
288 uint32_t count, uint8_t *values)
289{
290 return 0;
291}
292static long long qemu_s390_get_dirtycount_stub(S390StAttribState *sa)
293{
294 return 0;
295}
296static int qemu_s390_set_migrationmode_stub(S390StAttribState *sa, bool value)
297{
298 return 0;
299}
300
301static int qemu_s390_get_active(S390StAttribState *sa)
302{
303 return sa->migration_enabled;
304}
305
306static void qemu_s390_stattrib_class_init(ObjectClass *oc, void *data)
307{
308 S390StAttribClass *sa_cl = S390_STATTRIB_CLASS(oc);
309 DeviceClass *dc = DEVICE_CLASS(oc);
310
311 sa_cl->synchronize = qemu_s390_synchronize_stub;
312 sa_cl->get_stattr = qemu_s390_get_stattr_stub;
313 sa_cl->set_stattr = qemu_s390_peek_stattr_stub;
314 sa_cl->peek_stattr = qemu_s390_peek_stattr_stub;
315 sa_cl->set_migrationmode = qemu_s390_set_migrationmode_stub;
316 sa_cl->get_dirtycount = qemu_s390_get_dirtycount_stub;
317 sa_cl->get_active = qemu_s390_get_active;
318
319
320 dc->user_creatable = false;
321}
322
323static const TypeInfo qemu_s390_stattrib_info = {
324 .name = TYPE_QEMU_S390_STATTRIB,
325 .parent = TYPE_S390_STATTRIB,
326 .instance_init = qemu_s390_stattrib_instance_init,
327 .instance_size = sizeof(QEMUS390StAttribState),
328 .class_init = qemu_s390_stattrib_class_init,
329 .class_size = sizeof(S390StAttribClass),
330};
331
332
333
334static void s390_stattrib_realize(DeviceState *dev, Error **errp)
335{
336 bool ambiguous = false;
337
338 object_resolve_path_type("", TYPE_S390_STATTRIB, &ambiguous);
339 if (ambiguous) {
340 error_setg(errp, "storage_attributes device already exists");
341 }
342}
343
344static void s390_stattrib_class_init(ObjectClass *oc, void *data)
345{
346 DeviceClass *dc = DEVICE_CLASS(oc);
347
348 dc->hotpluggable = false;
349 set_bit(DEVICE_CATEGORY_MISC, dc->categories);
350 dc->realize = s390_stattrib_realize;
351}
352
353static inline bool s390_stattrib_get_migration_enabled(Object *obj, Error **e)
354{
355 S390StAttribState *s = S390_STATTRIB(obj);
356
357 return s->migration_enabled;
358}
359
360static inline void s390_stattrib_set_migration_enabled(Object *obj, bool value,
361 Error **errp)
362{
363 S390StAttribState *s = S390_STATTRIB(obj);
364
365 s->migration_enabled = value;
366}
367
368static void s390_stattrib_instance_init(Object *obj)
369{
370 S390StAttribState *sas = S390_STATTRIB(obj);
371 SaveVMHandlers *ops;
372
373
374 ops = g_new0(SaveVMHandlers, 1);
375
376 ops->save_setup = cmma_save_setup;
377 ops->save_live_iterate = cmma_save_iterate;
378 ops->save_live_complete_precopy = cmma_save_complete;
379 ops->save_live_pending = cmma_save_pending;
380 ops->save_cleanup = cmma_save_cleanup;
381 ops->load_state = cmma_load;
382 ops->is_active = cmma_active;
383 register_savevm_live(NULL, TYPE_S390_STATTRIB, 0, 0, ops, sas);
384
385 object_property_add_bool(obj, "migration-enabled",
386 s390_stattrib_get_migration_enabled,
387 s390_stattrib_set_migration_enabled, NULL);
388 object_property_set_bool(obj, true, "migration-enabled", NULL);
389 sas->migration_cur_gfn = 0;
390}
391
392static const TypeInfo s390_stattrib_info = {
393 .name = TYPE_S390_STATTRIB,
394 .parent = TYPE_DEVICE,
395 .instance_init = s390_stattrib_instance_init,
396 .instance_size = sizeof(S390StAttribState),
397 .class_init = s390_stattrib_class_init,
398 .class_size = sizeof(S390StAttribClass),
399 .abstract = true,
400};
401
402static void s390_stattrib_register_types(void)
403{
404 type_register_static(&s390_stattrib_info);
405 type_register_static(&qemu_s390_stattrib_info);
406}
407
408type_init(s390_stattrib_register_types)
409
