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12#include "qemu/osdep.h"
13#include "qemu/units.h"
14#include "migration/qemu-file.h"
15#include "migration/register.h"
16#include "hw/s390x/storage-attributes.h"
17#include "qemu/error-report.h"
18#include "exec/ram_addr.h"
19#include "qapi/error.h"
20#include "qapi/qmp/qdict.h"
21
22
23#define CMMA_BLOCK_SIZE (512 * KiB)
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);
50 object_unref(obj);
51
52 qdev_realize(DEVICE(obj), NULL, &error_fatal);
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_state_pending(void *opaque, uint64_t *must_precopy,
186 uint64_t *can_postcopy)
187{
188 S390StAttribState *sas = S390_STATTRIB(opaque);
189 S390StAttribClass *sac = S390_STATTRIB_GET_CLASS(sas);
190 long long res = sac->get_dirtycount(sas);
191
192 if (res >= 0) {
193 *must_precopy += res;
194 }
195}
196
197static int cmma_save(QEMUFile *f, void *opaque, int final)
198{
199 S390StAttribState *sas = S390_STATTRIB(opaque);
200 S390StAttribClass *sac = S390_STATTRIB_GET_CLASS(sas);
201 uint8_t *buf;
202 int r, cx, reallen = 0, ret = 0;
203 uint32_t buflen = CMMA_BLOCK_SIZE;
204 uint64_t start_gfn = sas->migration_cur_gfn;
205
206 buf = g_try_malloc(buflen);
207 if (!buf) {
208 error_report("Could not allocate memory to save storage attributes");
209 return -ENOMEM;
210 }
211
212 while (final ? 1 : qemu_file_rate_limit(f) == 0) {
213 reallen = sac->get_stattr(sas, &start_gfn, buflen, buf);
214 if (reallen < 0) {
215 g_free(buf);
216 return reallen;
217 }
218
219 ret = 1;
220 if (!reallen) {
221 break;
222 }
223 qemu_put_be64(f, (start_gfn << TARGET_PAGE_BITS) | STATTR_FLAG_MORE);
224 qemu_put_be64(f, reallen);
225 for (cx = 0; cx < reallen; cx++) {
226 qemu_put_byte(f, buf[cx]);
227 }
228 if (!sac->get_dirtycount(sas)) {
229 break;
230 }
231 }
232
233 sas->migration_cur_gfn = start_gfn + reallen;
234 g_free(buf);
235 if (final) {
236 qemu_put_be64(f, STATTR_FLAG_DONE);
237 }
238 qemu_put_be64(f, STATTR_FLAG_EOS);
239
240 r = qemu_file_get_error(f);
241 if (r < 0) {
242 return r;
243 }
244
245 return ret;
246}
247
248static int cmma_save_iterate(QEMUFile *f, void *opaque)
249{
250 return cmma_save(f, opaque, 0);
251}
252
253static int cmma_save_complete(QEMUFile *f, void *opaque)
254{
255 return cmma_save(f, opaque, 1);
256}
257
258static void cmma_save_cleanup(void *opaque)
259{
260 S390StAttribState *sas = S390_STATTRIB(opaque);
261 S390StAttribClass *sac = S390_STATTRIB_GET_CLASS(sas);
262 sac->set_migrationmode(sas, 0);
263}
264
265static bool cmma_active(void *opaque)
266{
267 S390StAttribState *sas = S390_STATTRIB(opaque);
268 S390StAttribClass *sac = S390_STATTRIB_GET_CLASS(sas);
269 return sac->get_active(sas);
270}
271
272
273
274static void qemu_s390_stattrib_instance_init(Object *obj)
275{
276}
277
278static int qemu_s390_peek_stattr_stub(S390StAttribState *sa, uint64_t start_gfn,
279 uint32_t count, uint8_t *values)
280{
281 return 0;
282}
283static void qemu_s390_synchronize_stub(S390StAttribState *sa)
284{
285}
286static int qemu_s390_get_stattr_stub(S390StAttribState *sa, uint64_t *start_gfn,
287 uint32_t count, uint8_t *values)
288{
289 return 0;
290}
291static long long qemu_s390_get_dirtycount_stub(S390StAttribState *sa)
292{
293 return 0;
294}
295static int qemu_s390_set_migrationmode_stub(S390StAttribState *sa, bool value)
296{
297 return 0;
298}
299
300static int qemu_s390_get_active(S390StAttribState *sa)
301{
302 return sa->migration_enabled;
303}
304
305static void qemu_s390_stattrib_class_init(ObjectClass *oc, void *data)
306{
307 S390StAttribClass *sa_cl = S390_STATTRIB_CLASS(oc);
308 DeviceClass *dc = DEVICE_CLASS(oc);
309
310 sa_cl->synchronize = qemu_s390_synchronize_stub;
311 sa_cl->get_stattr = qemu_s390_get_stattr_stub;
312 sa_cl->set_stattr = qemu_s390_peek_stattr_stub;
313 sa_cl->peek_stattr = qemu_s390_peek_stattr_stub;
314 sa_cl->set_migrationmode = qemu_s390_set_migrationmode_stub;
315 sa_cl->get_dirtycount = qemu_s390_get_dirtycount_stub;
316 sa_cl->get_active = qemu_s390_get_active;
317
318
319 dc->user_creatable = false;
320}
321
322static const TypeInfo qemu_s390_stattrib_info = {
323 .name = TYPE_QEMU_S390_STATTRIB,
324 .parent = TYPE_S390_STATTRIB,
325 .instance_init = qemu_s390_stattrib_instance_init,
326 .instance_size = sizeof(QEMUS390StAttribState),
327 .class_init = qemu_s390_stattrib_class_init,
328 .class_size = sizeof(S390StAttribClass),
329};
330
331
332
333static void s390_stattrib_realize(DeviceState *dev, Error **errp)
334{
335 bool ambiguous = false;
336
337 object_resolve_path_type("", TYPE_S390_STATTRIB, &ambiguous);
338 if (ambiguous) {
339 error_setg(errp, "storage_attributes device already exists");
340 }
341}
342
343static void s390_stattrib_class_init(ObjectClass *oc, void *data)
344{
345 DeviceClass *dc = DEVICE_CLASS(oc);
346
347 dc->hotpluggable = false;
348 set_bit(DEVICE_CATEGORY_MISC, dc->categories);
349 dc->realize = s390_stattrib_realize;
350}
351
352static inline bool s390_stattrib_get_migration_enabled(Object *obj,
353 Error **errp)
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 SaveVMHandlers savevm_s390_stattrib_handlers = {
369 .save_setup = cmma_save_setup,
370 .save_live_iterate = cmma_save_iterate,
371 .save_live_complete_precopy = cmma_save_complete,
372 .state_pending_exact = cmma_state_pending,
373 .state_pending_estimate = cmma_state_pending,
374 .save_cleanup = cmma_save_cleanup,
375 .load_state = cmma_load,
376 .is_active = cmma_active,
377};
378
379static void s390_stattrib_instance_init(Object *obj)
380{
381 S390StAttribState *sas = S390_STATTRIB(obj);
382
383 register_savevm_live(TYPE_S390_STATTRIB, 0, 0,
384 &savevm_s390_stattrib_handlers, sas);
385
386 object_property_add_bool(obj, "migration-enabled",
387 s390_stattrib_get_migration_enabled,
388 s390_stattrib_set_migration_enabled);
389 object_property_set_bool(obj, "migration-enabled", true, NULL);
390 sas->migration_cur_gfn = 0;
391}
392
393static const TypeInfo s390_stattrib_info = {
394 .name = TYPE_S390_STATTRIB,
395 .parent = TYPE_DEVICE,
396 .instance_init = s390_stattrib_instance_init,
397 .instance_size = sizeof(S390StAttribState),
398 .class_init = s390_stattrib_class_init,
399 .class_size = sizeof(S390StAttribClass),
400 .abstract = true,
401};
402
403static void s390_stattrib_register_types(void)
404{
405 type_register_static(&s390_stattrib_info);
406 type_register_static(&qemu_s390_stattrib_info);
407}
408
409type_init(s390_stattrib_register_types)
410
