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Merge tag 'pull-nvme-20241104' of https://gitlab.com/birkelund/qemu into staging
[qemu/kevin.git] / target / s390x / cpu_models.c
bloba27f4b6f79b2c876811d6c6209d96a9185b3faa0
1 /*
2 * CPU models for s390x
3 *
4 * Copyright 2016 IBM Corp.
5 *
6 * Author(s): David Hildenbrand <dahi@linux.vnet.ibm.com>
7 *
8 * This work is licensed under the terms of the GNU GPL, version 2 or (at
9 * your option) any later version. See the COPYING file in the top-level
10 * directory.
11 */
12
13 #include "qemu/osdep.h"
14 #include "cpu.h"
15 #include "s390x-internal.h"
16 #include "kvm/kvm_s390x.h"
17 #include "sysemu/kvm.h"
18 #include "sysemu/tcg.h"
19 #include "qapi/error.h"
20 #include "qemu/error-report.h"
21 #include "qapi/visitor.h"
22 #include "qemu/module.h"
23 #include "qemu/hw-version.h"
24 #include "qemu/qemu-print.h"
25 #ifndef CONFIG_USER_ONLY
26 #include "sysemu/sysemu.h"
27 #include "target/s390x/kvm/pv.h"
28 #include CONFIG_DEVICES
29 #endif
30
31 #define CPUDEF_INIT(_type, _gen, _ec_ga, _mha_pow, _hmfai, _name, _desc) \
32 { \
33 .name = _name, \
34 .type = _type, \
35 .gen = _gen, \
36 .ec_ga = _ec_ga, \
37 .mha_pow = _mha_pow, \
38 .hmfai = _hmfai, \
39 .desc = _desc, \
40 .base_init = { S390_FEAT_LIST_GEN ## _gen ## _GA ## _ec_ga ## _BASE }, \
41 .default_init = { S390_FEAT_LIST_GEN ## _gen ## _GA ## _ec_ga ## _DEFAULT }, \
42 .full_init = { S390_FEAT_LIST_GEN ## _gen ## _GA ## _ec_ga ## _FULL }, \
43 }
44
45 /*
46 * CPU definition list in order of release. Up to generation 14 base features
47 * of a following release have been a superset of the previous release. With
48 * generation 15 one base feature and one optional feature have been deprecated.
49 */
50 static S390CPUDef s390_cpu_defs[] = {
51 /*
52 * Linux requires at least z10 nowadays, and IBM only supports recent CPUs
53 * (see https://www.ibm.com/support/pages/ibm-mainframe-life-cycle-history),
54 * so we consider older CPUs as legacy that can optionally be disabled via
55 * the CONFIG_S390X_LEGACY_CPUS config switch.
56 */
57 #if defined(CONFIG_S390X_LEGACY_CPUS) || defined(CONFIG_USER_ONLY)
58 CPUDEF_INIT(0x2064, 7, 1, 38, 0x00000000U, "z900", "IBM zSeries 900 GA1"),
59 CPUDEF_INIT(0x2064, 7, 2, 38, 0x00000000U, "z900.2", "IBM zSeries 900 GA2"),
60 CPUDEF_INIT(0x2064, 7, 3, 38, 0x00000000U, "z900.3", "IBM zSeries 900 GA3"),
61 CPUDEF_INIT(0x2066, 7, 3, 38, 0x00000000U, "z800", "IBM zSeries 800 GA1"),
62 CPUDEF_INIT(0x2084, 8, 1, 38, 0x00000000U, "z990", "IBM zSeries 990 GA1"),
63 CPUDEF_INIT(0x2084, 8, 2, 38, 0x00000000U, "z990.2", "IBM zSeries 990 GA2"),
64 CPUDEF_INIT(0x2084, 8, 3, 38, 0x00000000U, "z990.3", "IBM zSeries 990 GA3"),
65 CPUDEF_INIT(0x2086, 8, 3, 38, 0x00000000U, "z890", "IBM zSeries 880 GA1"),
66 CPUDEF_INIT(0x2084, 8, 4, 38, 0x00000000U, "z990.4", "IBM zSeries 990 GA4"),
67 CPUDEF_INIT(0x2086, 8, 4, 38, 0x00000000U, "z890.2", "IBM zSeries 880 GA2"),
68 CPUDEF_INIT(0x2084, 8, 5, 38, 0x00000000U, "z990.5", "IBM zSeries 990 GA5"),
69 CPUDEF_INIT(0x2086, 8, 5, 38, 0x00000000U, "z890.3", "IBM zSeries 880 GA3"),
70 CPUDEF_INIT(0x2094, 9, 1, 40, 0x00000000U, "z9EC", "IBM System z9 EC GA1"),
71 CPUDEF_INIT(0x2094, 9, 2, 40, 0x00000000U, "z9EC.2", "IBM System z9 EC GA2"),
72 CPUDEF_INIT(0x2096, 9, 2, 40, 0x00000000U, "z9BC", "IBM System z9 BC GA1"),
73 CPUDEF_INIT(0x2094, 9, 3, 40, 0x00000000U, "z9EC.3", "IBM System z9 EC GA3"),
74 CPUDEF_INIT(0x2096, 9, 3, 40, 0x00000000U, "z9BC.2", "IBM System z9 BC GA2"),
75 #endif
76 CPUDEF_INIT(0x2097, 10, 1, 43, 0x00000000U, "z10EC", "IBM System z10 EC GA1"),
77 CPUDEF_INIT(0x2097, 10, 2, 43, 0x00000000U, "z10EC.2", "IBM System z10 EC GA2"),
78 CPUDEF_INIT(0x2098, 10, 2, 43, 0x00000000U, "z10BC", "IBM System z10 BC GA1"),
79 CPUDEF_INIT(0x2097, 10, 3, 43, 0x00000000U, "z10EC.3", "IBM System z10 EC GA3"),
80 CPUDEF_INIT(0x2098, 10, 3, 43, 0x00000000U, "z10BC.2", "IBM System z10 BC GA2"),
81 CPUDEF_INIT(0x2817, 11, 1, 44, 0x08000000U, "z196", "IBM zEnterprise 196 GA1"),
82 CPUDEF_INIT(0x2817, 11, 2, 44, 0x08000000U, "z196.2", "IBM zEnterprise 196 GA2"),
83 CPUDEF_INIT(0x2818, 11, 2, 44, 0x08000000U, "z114", "IBM zEnterprise 114 GA1"),
84 CPUDEF_INIT(0x2827, 12, 1, 44, 0x08000000U, "zEC12", "IBM zEnterprise EC12 GA1"),
85 CPUDEF_INIT(0x2827, 12, 2, 44, 0x08000000U, "zEC12.2", "IBM zEnterprise EC12 GA2"),
86 CPUDEF_INIT(0x2828, 12, 2, 44, 0x08000000U, "zBC12", "IBM zEnterprise BC12 GA1"),
87 CPUDEF_INIT(0x2964, 13, 1, 47, 0x08000000U, "z13", "IBM z13 GA1"),
88 CPUDEF_INIT(0x2964, 13, 2, 47, 0x08000000U, "z13.2", "IBM z13 GA2"),
89 CPUDEF_INIT(0x2965, 13, 2, 47, 0x08000000U, "z13s", "IBM z13s GA1"),
90 CPUDEF_INIT(0x3906, 14, 1, 47, 0x08000000U, "z14", "IBM z14 GA1"),
91 CPUDEF_INIT(0x3906, 14, 2, 47, 0x08000000U, "z14.2", "IBM z14 GA2"),
92 CPUDEF_INIT(0x3907, 14, 1, 47, 0x08000000U, "z14ZR1", "IBM z14 Model ZR1 GA1"),
93 CPUDEF_INIT(0x8561, 15, 1, 47, 0x08000000U, "gen15a", "IBM z15 T01 GA1"),
94 CPUDEF_INIT(0x8562, 15, 1, 47, 0x08000000U, "gen15b", "IBM z15 T02 GA1"),
95 CPUDEF_INIT(0x3931, 16, 1, 47, 0x08000000U, "gen16a", "IBM 3931 GA1"),
96 CPUDEF_INIT(0x3932, 16, 1, 47, 0x08000000U, "gen16b", "IBM 3932 GA1"),
97 };
98
99 #define QEMU_MAX_CPU_TYPE 0x8561
100 #define QEMU_MAX_CPU_GEN 15
101 #define QEMU_MAX_CPU_EC_GA 1
102 static S390FeatBitmap qemu_max_cpu_feat;
103
104 /* features part of a base model but not relevant for finding a base model */
105 S390FeatBitmap ignored_base_feat;
106
107 void s390_cpudef_featoff(uint8_t gen, uint8_t ec_ga, S390Feat feat)
108 {
109 const S390CPUDef *def;
110
111 def = s390_find_cpu_def(0, gen, ec_ga, NULL);
112 clear_bit(feat, (unsigned long *)&def->default_feat);
113 }
114
115 void s390_cpudef_featoff_greater(uint8_t gen, uint8_t ec_ga, S390Feat feat)
116 {
117 int i;
118
119 for (i = 0; i < ARRAY_SIZE(s390_cpu_defs); i++) {
120 const S390CPUDef *def = &s390_cpu_defs[i];
121
122 if (def->gen < gen) {
123 continue;
124 }
125 if (def->gen == gen && def->ec_ga < ec_ga) {
126 continue;
127 }
128
129 clear_bit(feat, (unsigned long *)&def->default_feat);
130 }
131 }
132
133 void s390_cpudef_group_featoff_greater(uint8_t gen, uint8_t ec_ga,
134 S390FeatGroup group)
135 {
136 const S390FeatGroupDef *group_def = s390_feat_group_def(group);
137 S390FeatBitmap group_def_off;
138 int i;
139
140 bitmap_complement(group_def_off, group_def->feat, S390_FEAT_MAX);
141
142 for (i = 0; i < ARRAY_SIZE(s390_cpu_defs); i++) {
143 const S390CPUDef *cpu_def = &s390_cpu_defs[i];
144
145 if (cpu_def->gen < gen) {
146 continue;
147 }
148 if (cpu_def->gen == gen && cpu_def->ec_ga < ec_ga) {
149 continue;
150 }
151
152 bitmap_and((unsigned long *)&cpu_def->default_feat,
153 cpu_def->default_feat, group_def_off, S390_FEAT_MAX);
154 }
155 }
156
157 uint32_t s390_get_hmfai(void)
158 {
159 static S390CPU *cpu;
160
161 if (!cpu) {
162 cpu = S390_CPU(qemu_get_cpu(0));
163 }
164
165 if (!cpu || !cpu->model) {
166 return 0;
167 }
168 return cpu->model->def->hmfai;
169 }
170
171 uint8_t s390_get_mha_pow(void)
172 {
173 static S390CPU *cpu;
174
175 if (!cpu) {
176 cpu = S390_CPU(qemu_get_cpu(0));
177 }
178
179 if (!cpu || !cpu->model) {
180 return 0;
181 }
182 return cpu->model->def->mha_pow;
183 }
184
185 uint32_t s390_get_ibc_val(void)
186 {
187 uint16_t unblocked_ibc, lowest_ibc;
188 static S390CPU *cpu;
189
190 if (!cpu) {
191 cpu = S390_CPU(qemu_get_cpu(0));
192 }
193
194 if (!cpu || !cpu->model) {
195 return 0;
196 }
197 unblocked_ibc = s390_ibc_from_cpu_model(cpu->model);
198 lowest_ibc = cpu->model->lowest_ibc;
199 /* the lowest_ibc always has to be <= unblocked_ibc */
200 if (!lowest_ibc || lowest_ibc > unblocked_ibc) {
201 return 0;
202 }
203 return ((uint32_t) lowest_ibc << 16) | unblocked_ibc;
204 }
205
206 void s390_get_feat_block(S390FeatType type, uint8_t *data)
207 {
208 S390CPU *cpu = S390_CPU(first_cpu);
209
210 if (!cpu || !cpu->model) {
211 return;
212 }
213 s390_fill_feat_block(cpu->model->features, type, data);
214 }
215
216 bool s390_has_feat(S390Feat feat)
217 {
218 static S390CPU *cpu;
219
220 if (!cpu) {
221 cpu = S390_CPU(qemu_get_cpu(0));
222 }
223
224 if (!cpu || !cpu->model) {
225 #ifdef CONFIG_KVM
226 if (kvm_enabled()) {
227 if (feat == S390_FEAT_VECTOR) {
228 return kvm_check_extension(kvm_state,
229 KVM_CAP_S390_VECTOR_REGISTERS);
230 }
231 if (feat == S390_FEAT_RUNTIME_INSTRUMENTATION) {
232 return kvm_s390_get_ri();
233 }
234 if (feat == S390_FEAT_MSA_EXT_3) {
235 return true;
236 }
237 }
238 #endif
239 if (feat == S390_FEAT_ZPCI) {
240 return true;
241 }
242 return 0;
243 }
244
245 #ifndef CONFIG_USER_ONLY
246 if (s390_is_pv()) {
247 switch (feat) {
248 case S390_FEAT_DIAG_318:
249 case S390_FEAT_HPMA2:
250 case S390_FEAT_SIE_F2:
251 case S390_FEAT_SIE_SKEY:
252 case S390_FEAT_SIE_GPERE:
253 case S390_FEAT_SIE_SIIF:
254 case S390_FEAT_SIE_SIGPIF:
255 case S390_FEAT_SIE_IB:
256 case S390_FEAT_SIE_CEI:
257 case S390_FEAT_SIE_KSS:
258 case S390_FEAT_SIE_GSLS:
259 case S390_FEAT_SIE_64BSCAO:
260 case S390_FEAT_SIE_CMMA:
261 case S390_FEAT_SIE_PFMFI:
262 case S390_FEAT_SIE_IBS:
263 case S390_FEAT_CONFIGURATION_TOPOLOGY:
264 return false;
265 break;
266 default:
267 break;
268 }
269 }
270 #endif
271 return test_bit(feat, cpu->model->features);
272 }
273
274 uint8_t s390_get_gen_for_cpu_type(uint16_t type)
275 {
276 int i;
277
278 for (i = 0; i < ARRAY_SIZE(s390_cpu_defs); i++) {
279 if (s390_cpu_defs[i].type == type) {
280 return s390_cpu_defs[i].gen;
281 }
282 }
283 return 0;
284 }
285
286 const S390CPUDef *s390_find_cpu_def(uint16_t type, uint8_t gen, uint8_t ec_ga,
287 S390FeatBitmap features)
288 {
289 const S390CPUDef *last_compatible = NULL;
290 const S390CPUDef *matching_cpu_type = NULL;
291 int i;
292
293 if (!gen) {
294 ec_ga = 0;
295 }
296 if (!gen && type) {
297 gen = s390_get_gen_for_cpu_type(type);
298 }
299
300 for (i = 0; i < ARRAY_SIZE(s390_cpu_defs); i++) {
301 const S390CPUDef *def = &s390_cpu_defs[i];
302 S390FeatBitmap missing;
303
304 /* don't even try newer generations if we know the generation */
305 if (gen) {
306 if (def->gen > gen) {
307 break;
308 } else if (def->gen == gen && ec_ga && def->ec_ga > ec_ga) {
309 break;
310 }
311 }
312
313 if (features) {
314 /* see if the model satisfies the minimum features */
315 bitmap_andnot(missing, def->base_feat, features, S390_FEAT_MAX);
316 /*
317 * Ignore certain features that are in the base model, but not
318 * relevant for the search (esp. MSA subfunctions).
319 */
320 bitmap_andnot(missing, missing, ignored_base_feat, S390_FEAT_MAX);
321 if (!bitmap_empty(missing, S390_FEAT_MAX)) {
322 break;
323 }
324 }
325
326 /* stop the search if we found the exact model */
327 if (def->type == type && def->ec_ga == ec_ga) {
328 return def;
329 }
330 /* remember if we've at least seen one with the same cpu type */
331 if (def->type == type) {
332 matching_cpu_type = def;
333 }
334 last_compatible = def;
335 }
336 /* prefer the model with the same cpu type, esp. don't take the BC for EC */
337 if (matching_cpu_type) {
338 return matching_cpu_type;
339 }
340 return last_compatible;
341 }
342
343 static void s390_print_cpu_model_list_entry(gpointer data, gpointer user_data)
344 {
345 const S390CPUClass *scc = S390_CPU_CLASS((ObjectClass *)data);
346 CPUClass *cc = CPU_CLASS(scc);
347 char *name = g_strdup(object_class_get_name((ObjectClass *)data));
348 g_autoptr(GString) details = g_string_new("");
349
350 if (scc->is_static) {
351 g_string_append(details, "static, ");
352 }
353 if (scc->is_migration_safe) {
354 g_string_append(details, "migration-safe, ");
355 }
356 if (cc->deprecation_note) {
357 g_string_append(details, "deprecated, ");
358 }
359 if (details->len) {
360 /* cull trailing ', ' */
361 g_string_truncate(details, details->len - 2);
362 }
363
364 /* strip off the -s390x-cpu */
365 g_strrstr(name, "-" TYPE_S390_CPU)[0] = 0;
366 if (details->len) {
367 qemu_printf(" %-15s %-35s (%s)\n", name, scc->desc, details->str);
368 } else {
369 qemu_printf(" %-15s %-35s\n", name, scc->desc);
370 }
371 g_free(name);
372 }
373
374 static gint s390_cpu_list_compare(gconstpointer a, gconstpointer b)
375 {
376 const S390CPUClass *cc_a = S390_CPU_CLASS((ObjectClass *)a);
377 const S390CPUClass *cc_b = S390_CPU_CLASS((ObjectClass *)b);
378 const char *name_a = object_class_get_name((ObjectClass *)a);
379 const char *name_b = object_class_get_name((ObjectClass *)b);
380
381 /*
382 * Move qemu, host and max to the top of the list, qemu first, host second,
383 * max third.
384 */
385 if (name_a[0] == 'q') {
386 return -1;
387 } else if (name_b[0] == 'q') {
388 return 1;
389 } else if (name_a[0] == 'h') {
390 return -1;
391 } else if (name_b[0] == 'h') {
392 return 1;
393 } else if (name_a[0] == 'm') {
394 return -1;
395 } else if (name_b[0] == 'm') {
396 return 1;
397 }
398
399 /* keep the same order we have in our table (sorted by release date) */
400 if (cc_a->cpu_def != cc_b->cpu_def) {
401 return cc_a->cpu_def - cc_b->cpu_def;
402 }
403
404 /* exact same definition - list base model first */
405 return cc_a->is_static ? -1 : 1;
406 }
407
408 void s390_cpu_list(void)
409 {
410 S390FeatGroup group;
411 S390Feat feat;
412 GSList *list;
413
414 qemu_printf("Available CPUs:\n");
415 list = object_class_get_list(TYPE_S390_CPU, false);
416 list = g_slist_sort(list, s390_cpu_list_compare);
417 g_slist_foreach(list, s390_print_cpu_model_list_entry, NULL);
418 g_slist_free(list);
419
420 qemu_printf("\nRecognized feature flags:\n");
421 for (feat = 0; feat < S390_FEAT_MAX; feat++) {
422 const S390FeatDef *def = s390_feat_def(feat);
423
424 qemu_printf(" %-20s %s\n", def->name, def->desc);
425 }
426
427 qemu_printf("\nRecognized feature groups:\n");
428 for (group = 0; group < S390_FEAT_GROUP_MAX; group++) {
429 const S390FeatGroupDef *def = s390_feat_group_def(group);
430
431 qemu_printf(" %-20s %s\n", def->name, def->desc);
432 }
433 }
434
435 static void check_consistency(const S390CPUModel *model)
436 {
437 static int dep[][2] = {
438 { S390_FEAT_IPTE_RANGE, S390_FEAT_DAT_ENH },
439 { S390_FEAT_IDTE_SEGMENT, S390_FEAT_DAT_ENH },
440 { S390_FEAT_IDTE_REGION, S390_FEAT_DAT_ENH },
441 { S390_FEAT_IDTE_REGION, S390_FEAT_IDTE_SEGMENT },
442 { S390_FEAT_LOCAL_TLB_CLEARING, S390_FEAT_DAT_ENH},
443 { S390_FEAT_LONG_DISPLACEMENT_FAST, S390_FEAT_LONG_DISPLACEMENT },
444 { S390_FEAT_DFP_FAST, S390_FEAT_DFP },
445 { S390_FEAT_TRANSACTIONAL_EXE, S390_FEAT_STFLE_49 },
446 { S390_FEAT_EDAT_2, S390_FEAT_EDAT},
447 { S390_FEAT_MSA_EXT_5, S390_FEAT_KIMD_SHA_512 },
448 { S390_FEAT_MSA_EXT_5, S390_FEAT_KLMD_SHA_512 },
449 { S390_FEAT_MSA_EXT_4, S390_FEAT_MSA_EXT_3 },
450 { S390_FEAT_SIE_CMMA, S390_FEAT_CMM },
451 { S390_FEAT_SIE_CMMA, S390_FEAT_SIE_GSLS },
452 { S390_FEAT_SIE_PFMFI, S390_FEAT_EDAT },
453 { S390_FEAT_MSA_EXT_8, S390_FEAT_MSA_EXT_3 },
454 { S390_FEAT_MSA_EXT_9, S390_FEAT_MSA_EXT_3 },
455 { S390_FEAT_MSA_EXT_9, S390_FEAT_MSA_EXT_4 },
456 { S390_FEAT_MULTIPLE_EPOCH, S390_FEAT_TOD_CLOCK_STEERING },
457 { S390_FEAT_VECTOR_PACKED_DECIMAL, S390_FEAT_VECTOR },
458 { S390_FEAT_VECTOR_PACKED_DECIMAL_ENH, S390_FEAT_VECTOR_PACKED_DECIMAL },
459 { S390_FEAT_VECTOR_PACKED_DECIMAL_ENH2, S390_FEAT_VECTOR_PACKED_DECIMAL_ENH },
460 { S390_FEAT_VECTOR_ENH, S390_FEAT_VECTOR },
461 { S390_FEAT_INSTRUCTION_EXEC_PROT, S390_FEAT_SIDE_EFFECT_ACCESS_ESOP2 },
462 { S390_FEAT_SIDE_EFFECT_ACCESS_ESOP2, S390_FEAT_ESOP },
463 { S390_FEAT_CMM_NT, S390_FEAT_CMM },
464 { S390_FEAT_GUARDED_STORAGE, S390_FEAT_SIDE_EFFECT_ACCESS_ESOP2 },
465 { S390_FEAT_MULTIPLE_EPOCH, S390_FEAT_STORE_CLOCK_FAST },
466 { S390_FEAT_MULTIPLE_EPOCH, S390_FEAT_TOD_CLOCK_STEERING },
467 { S390_FEAT_SEMAPHORE_ASSIST, S390_FEAT_STFLE_49 },
468 { S390_FEAT_KIMD_SHA3_224, S390_FEAT_MSA },
469 { S390_FEAT_KIMD_SHA3_256, S390_FEAT_MSA },
470 { S390_FEAT_KIMD_SHA3_384, S390_FEAT_MSA },
471 { S390_FEAT_KIMD_SHA3_512, S390_FEAT_MSA },
472 { S390_FEAT_KIMD_SHAKE_128, S390_FEAT_MSA },
473 { S390_FEAT_KIMD_SHAKE_256, S390_FEAT_MSA },
474 { S390_FEAT_KLMD_SHA3_224, S390_FEAT_MSA },
475 { S390_FEAT_KLMD_SHA3_256, S390_FEAT_MSA },
476 { S390_FEAT_KLMD_SHA3_384, S390_FEAT_MSA },
477 { S390_FEAT_KLMD_SHA3_512, S390_FEAT_MSA },
478 { S390_FEAT_KLMD_SHAKE_128, S390_FEAT_MSA },
479 { S390_FEAT_KLMD_SHAKE_256, S390_FEAT_MSA },
480 { S390_FEAT_PRNO_TRNG_QRTCR, S390_FEAT_MSA_EXT_5 },
481 { S390_FEAT_PRNO_TRNG, S390_FEAT_MSA_EXT_5 },
482 { S390_FEAT_SIE_KSS, S390_FEAT_SIE_F2 },
483 { S390_FEAT_AP_QUERY_CONFIG_INFO, S390_FEAT_AP },
484 { S390_FEAT_AP_FACILITIES_TEST, S390_FEAT_AP },
485 { S390_FEAT_PTFF_QSIE, S390_FEAT_MULTIPLE_EPOCH },
486 { S390_FEAT_PTFF_QTOUE, S390_FEAT_MULTIPLE_EPOCH },
487 { S390_FEAT_PTFF_STOE, S390_FEAT_MULTIPLE_EPOCH },
488 { S390_FEAT_PTFF_STOUE, S390_FEAT_MULTIPLE_EPOCH },
489 { S390_FEAT_AP_QUEUE_INTERRUPT_CONTROL, S390_FEAT_AP },
490 { S390_FEAT_DIAG_318, S390_FEAT_EXTENDED_LENGTH_SCCB },
491 { S390_FEAT_NNPA, S390_FEAT_VECTOR },
492 { S390_FEAT_RDP, S390_FEAT_LOCAL_TLB_CLEARING },
493 { S390_FEAT_UV_FEAT_AP, S390_FEAT_AP },
494 { S390_FEAT_UV_FEAT_AP_INTR, S390_FEAT_UV_FEAT_AP },
495 };
496 int i;
497
498 for (i = 0; i < ARRAY_SIZE(dep); i++) {
499 if (test_bit(dep[i][0], model->features) &&
500 !test_bit(dep[i][1], model->features)) {
501 warn_report("\'%s\' requires \'%s\'.",
502 s390_feat_def(dep[i][0])->name,
503 s390_feat_def(dep[i][1])->name);
504 }
505 }
506 }
507
508 static void error_prepend_missing_feat(const char *name, void *opaque)
509 {
510 error_prepend((Error **) opaque, "%s ", name);
511 }
512
513 static void check_compat_model_failed(Error **errp,
514 const S390CPUModel *max_model,
515 const char *msg)
516 {
517 error_setg(errp, "%s. Maximum supported model in the current configuration: \'%s\'",
518 msg, max_model->def->name);
519 error_append_hint(errp, "Consider a different accelerator, try \"-accel help\"\n");
520 return;
521 }
522
523 static bool check_compatibility(const S390CPUModel *max_model,
524 const S390CPUModel *model, Error **errp)
525 {
526 ERRP_GUARD();
527 S390FeatBitmap missing;
528
529 if (model->def->gen > max_model->def->gen) {
530 check_compat_model_failed(errp, max_model, "Selected CPU generation is too new");
531 return false;
532 } else if (model->def->gen == max_model->def->gen &&
533 model->def->ec_ga > max_model->def->ec_ga) {
534 check_compat_model_failed(errp, max_model, "Selected CPU GA level is too new");
535 return false;
536 }
537
538 #ifndef CONFIG_USER_ONLY
539 if (only_migratable && test_bit(S390_FEAT_UNPACK, model->features)) {
540 error_setg(errp, "The unpack facility is not compatible with "
541 "the --only-migratable option. You must remove either "
542 "the 'unpack' facility or the --only-migratable option");
543 return false;
544 }
545 #endif
546
547 /* detect the missing features to properly report them */
548 bitmap_andnot(missing, model->features, max_model->features, S390_FEAT_MAX);
549 if (bitmap_empty(missing, S390_FEAT_MAX)) {
550 return true;
551 }
552
553 error_setg(errp, " ");
554 s390_feat_bitmap_to_ascii(missing, errp, error_prepend_missing_feat);
555 error_prepend(errp, "Some features requested in the CPU model are not "
556 "available in the current configuration: ");
557 error_append_hint(errp,
558 "Consider a different accelerator, QEMU, or kernel version\n");
559 return false;
560 }
561
562 S390CPUModel *get_max_cpu_model(Error **errp)
563 {
564 static S390CPUModel max_model;
565 static bool cached;
566
567 if (cached) {
568 return &max_model;
569 }
570
571 if (kvm_enabled()) {
572 if (!kvm_s390_get_host_cpu_model(&max_model, errp)) {
573 return NULL;
574 }
575 } else {
576 max_model.def = s390_find_cpu_def(QEMU_MAX_CPU_TYPE, QEMU_MAX_CPU_GEN,
577 QEMU_MAX_CPU_EC_GA, NULL);
578 bitmap_copy(max_model.features, qemu_max_cpu_feat, S390_FEAT_MAX);
579 }
580 cached = true;
581 return &max_model;
582 }
583
584 void s390_realize_cpu_model(CPUState *cs, Error **errp)
585 {
586 ERRP_GUARD();
587 S390CPUClass *xcc = S390_CPU_GET_CLASS(cs);
588 S390CPU *cpu = S390_CPU(cs);
589 const S390CPUModel *max_model;
590
591 if (xcc->kvm_required && !kvm_enabled()) {
592 error_setg(errp, "CPU definition requires KVM");
593 return;
594 }
595
596 if (!cpu->model) {
597 /* no host model support -> perform compatibility stuff */
598 apply_cpu_model(NULL, errp);
599 return;
600 }
601
602 max_model = get_max_cpu_model(errp);
603 if (!max_model) {
604 error_prepend(errp, "CPU models are not available: ");
605 return;
606 }
607
608 /* copy over properties that can vary */
609 cpu->model->lowest_ibc = max_model->lowest_ibc;
610 cpu->model->cpu_id = max_model->cpu_id;
611 cpu->model->cpu_id_format = max_model->cpu_id_format;
612 cpu->model->cpu_ver = max_model->cpu_ver;
613
614 check_consistency(cpu->model);
615 if (!check_compatibility(max_model, cpu->model, errp)) {
616 return;
617 }
618
619 apply_cpu_model(cpu->model, errp);
620
621 #if !defined(CONFIG_USER_ONLY)
622 cpu->env.cpuid = s390_cpuid_from_cpu_model(cpu->model);
623 if (tcg_enabled()) {
624 cpu->env.cpuid = deposit64(cpu->env.cpuid, CPU_PHYS_ADDR_SHIFT,
625 CPU_PHYS_ADDR_BITS, cpu->env.core_id);
626 }
627 #endif
628 }
629
630 static void get_feature(Object *obj, Visitor *v, const char *name,
631 void *opaque, Error **errp)
632 {
633 S390Feat feat = (S390Feat) (uintptr_t) opaque;
634 S390CPU *cpu = S390_CPU(obj);
635 bool value;
636
637 if (!cpu->model) {
638 error_setg(errp, "Details about the host CPU model are not available, "
639 "features cannot be queried.");
640 return;
641 }
642
643 value = test_bit(feat, cpu->model->features);
644 visit_type_bool(v, name, &value, errp);
645 }
646
647 static void set_feature(Object *obj, Visitor *v, const char *name,
648 void *opaque, Error **errp)
649 {
650 S390Feat feat = (S390Feat) (uintptr_t) opaque;
651 DeviceState *dev = DEVICE(obj);
652 S390CPU *cpu = S390_CPU(obj);
653 bool value;
654
655 if (dev->realized) {
656 error_setg(errp, "Attempt to set property '%s' on '%s' after "
657 "it was realized", name, object_get_typename(obj));
658 return;
659 } else if (!cpu->model) {
660 error_setg(errp, "Details about the host CPU model are not available, "
661 "features cannot be changed.");
662 return;
663 }
664
665 if (!visit_type_bool(v, name, &value, errp)) {
666 return;
667 }
668 if (value) {
669 if (!test_bit(feat, cpu->model->def->full_feat)) {
670 error_setg(errp, "Feature '%s' is not available for CPU model '%s',"
671 " it was introduced with later models.",
672 name, cpu->model->def->name);
673 return;
674 }
675 set_bit(feat, cpu->model->features);
676 } else {
677 clear_bit(feat, cpu->model->features);
678 }
679 }
680
681 static void get_feature_group(Object *obj, Visitor *v, const char *name,
682 void *opaque, Error **errp)
683 {
684 S390FeatGroup group = (S390FeatGroup) (uintptr_t) opaque;
685 const S390FeatGroupDef *def = s390_feat_group_def(group);
686 S390CPU *cpu = S390_CPU(obj);
687 S390FeatBitmap tmp;
688 bool value;
689
690 if (!cpu->model) {
691 error_setg(errp, "Details about the host CPU model are not available, "
692 "features cannot be queried.");
693 return;
694 }
695
696 /* a group is enabled if all features are enabled */
697 bitmap_and(tmp, cpu->model->features, def->feat, S390_FEAT_MAX);
698 value = bitmap_equal(tmp, def->feat, S390_FEAT_MAX);
699 visit_type_bool(v, name, &value, errp);
700 }
701
702 static void set_feature_group(Object *obj, Visitor *v, const char *name,
703 void *opaque, Error **errp)
704 {
705 S390FeatGroup group = (S390FeatGroup) (uintptr_t) opaque;
706 const S390FeatGroupDef *def = s390_feat_group_def(group);
707 DeviceState *dev = DEVICE(obj);
708 S390CPU *cpu = S390_CPU(obj);
709 bool value;
710
711 if (dev->realized) {
712 error_setg(errp, "Attempt to set property '%s' on '%s' after "
713 "it was realized", name, object_get_typename(obj));
714 return;
715 } else if (!cpu->model) {
716 error_setg(errp, "Details about the host CPU model are not available, "
717 "features cannot be changed.");
718 return;
719 }
720
721 if (!visit_type_bool(v, name, &value, errp)) {
722 return;
723 }
724 if (value) {
725 /* groups are added in one shot, so an intersect is sufficient */
726 if (!bitmap_intersects(def->feat, cpu->model->def->full_feat,
727 S390_FEAT_MAX)) {
728 error_setg(errp, "Group '%s' is not available for CPU model '%s',"
729 " it was introduced with later models.",
730 name, cpu->model->def->name);
731 return;
732 }
733 bitmap_or(cpu->model->features, cpu->model->features, def->feat,
734 S390_FEAT_MAX);
735 } else {
736 bitmap_andnot(cpu->model->features, cpu->model->features, def->feat,
737 S390_FEAT_MAX);
738 }
739 }
740
741 static void s390_cpu_model_initfn(Object *obj)
742 {
743 S390CPU *cpu = S390_CPU(obj);
744 S390CPUClass *xcc = S390_CPU_GET_CLASS(cpu);
745
746 cpu->model = g_malloc0(sizeof(*cpu->model));
747 /* copy the model, so we can modify it */
748 cpu->model->def = xcc->cpu_def;
749 if (xcc->is_static) {
750 /* base model - features will never change */
751 bitmap_copy(cpu->model->features, cpu->model->def->base_feat,
752 S390_FEAT_MAX);
753 } else {
754 /* latest model - features can change */
755 bitmap_copy(cpu->model->features,
756 cpu->model->def->default_feat, S390_FEAT_MAX);
757 }
758 }
759
760 static S390CPUModel s390_qemu_cpu_model;
761
762 /* Set the qemu CPU model (on machine initialization). Must not be called
763 * once CPUs have been created.
764 */
765 void s390_set_qemu_cpu_model(uint16_t type, uint8_t gen, uint8_t ec_ga,
766 const S390FeatInit feat_init)
767 {
768 const S390CPUDef *def = s390_find_cpu_def(type, gen, ec_ga, NULL);
769
770 g_assert(def);
771 g_assert(QTAILQ_EMPTY_RCU(&cpus_queue));
772
773 /* build the CPU model */
774 s390_qemu_cpu_model.def = def;
775 bitmap_zero(s390_qemu_cpu_model.features, S390_FEAT_MAX);
776 s390_init_feat_bitmap(feat_init, s390_qemu_cpu_model.features);
777 }
778
779 static void s390_qemu_cpu_model_initfn(Object *obj)
780 {
781 S390CPU *cpu = S390_CPU(obj);
782
783 cpu->model = g_malloc0(sizeof(*cpu->model));
784 /* copy the CPU model so we can modify it */
785 memcpy(cpu->model, &s390_qemu_cpu_model, sizeof(*cpu->model));
786 }
787
788 static void s390_max_cpu_model_initfn(Object *obj)
789 {
790 const S390CPUModel *max_model;
791 S390CPU *cpu = S390_CPU(obj);
792 Error *local_err = NULL;
793
794 if (kvm_enabled() && !kvm_s390_cpu_models_supported()) {
795 /* "max" and "host" always work, even without CPU model support */
796 return;
797 }
798
799 max_model = get_max_cpu_model(&local_err);
800 if (local_err) {
801 /* we expect errors only under KVM, when actually querying the kernel */
802 g_assert(kvm_enabled());
803 error_report_err(local_err);
804 /* fallback to unsupported CPU models */
805 return;
806 }
807
808 cpu->model = g_new(S390CPUModel, 1);
809 /* copy the CPU model so we can modify it */
810 memcpy(cpu->model, max_model, sizeof(*cpu->model));
811 }
812
813 static void s390_cpu_model_finalize(Object *obj)
814 {
815 S390CPU *cpu = S390_CPU(obj);
816
817 g_free(cpu->model);
818 cpu->model = NULL;
819 }
820
821 static bool get_is_migration_safe(Object *obj, Error **errp)
822 {
823 return S390_CPU_GET_CLASS(obj)->is_migration_safe;
824 }
825
826 static bool get_is_static(Object *obj, Error **errp)
827 {
828 return S390_CPU_GET_CLASS(obj)->is_static;
829 }
830
831 static char *get_description(Object *obj, Error **errp)
832 {
833 return g_strdup(S390_CPU_GET_CLASS(obj)->desc);
834 }
835
836 void s390_cpu_model_class_register_props(ObjectClass *oc)
837 {
838 S390FeatGroup group;
839 S390Feat feat;
840
841 object_class_property_add_bool(oc, "migration-safe", get_is_migration_safe,
842 NULL);
843 object_class_property_add_bool(oc, "static", get_is_static,
844 NULL);
845 object_class_property_add_str(oc, "description", get_description, NULL);
846
847 for (feat = 0; feat < S390_FEAT_MAX; feat++) {
848 const S390FeatDef *def = s390_feat_def(feat);
849 object_class_property_add(oc, def->name, "bool", get_feature,
850 set_feature, NULL, (void *) feat);
851 object_class_property_set_description(oc, def->name, def->desc);
852 }
853 for (group = 0; group < S390_FEAT_GROUP_MAX; group++) {
854 const S390FeatGroupDef *def = s390_feat_group_def(group);
855 object_class_property_add(oc, def->name, "bool", get_feature_group,
856 set_feature_group, NULL, (void *) group);
857 object_class_property_set_description(oc, def->name, def->desc);
858 }
859 }
860
861 #ifdef CONFIG_KVM
862 static void s390_host_cpu_model_class_init(ObjectClass *oc, void *data)
863 {
864 S390CPUClass *xcc = S390_CPU_CLASS(oc);
865
866 xcc->kvm_required = true;
867 xcc->desc = "KVM only: All recognized features";
868 }
869 #endif
870
871 static void s390_base_cpu_model_class_init(ObjectClass *oc, void *data)
872 {
873 S390CPUClass *xcc = S390_CPU_CLASS(oc);
874
875 /* all base models are migration safe */
876 xcc->cpu_def = (const S390CPUDef *) data;
877 xcc->is_migration_safe = true;
878 xcc->is_static = true;
879 xcc->desc = xcc->cpu_def->desc;
880 }
881
882 static void s390_cpu_model_class_init(ObjectClass *oc, void *data)
883 {
884 S390CPUClass *xcc = S390_CPU_CLASS(oc);
885
886 /* model that can change between QEMU versions */
887 xcc->cpu_def = (const S390CPUDef *) data;
888 xcc->is_migration_safe = true;
889 xcc->desc = xcc->cpu_def->desc;
890 }
891
892 static void s390_qemu_cpu_model_class_init(ObjectClass *oc, void *data)
893 {
894 S390CPUClass *xcc = S390_CPU_CLASS(oc);
895
896 xcc->is_migration_safe = true;
897 xcc->desc = g_strdup_printf("QEMU Virtual CPU version %s",
898 qemu_hw_version());
899 }
900
901 static void s390_max_cpu_model_class_init(ObjectClass *oc, void *data)
902 {
903 S390CPUClass *xcc = S390_CPU_CLASS(oc);
904
905 /*
906 * The "max" model is neither static nor migration safe. Under KVM
907 * it represents the "host" model. Under TCG it represents the "qemu" CPU
908 * model of the latest QEMU machine.
909 */
910 xcc->desc =
911 "Enables all features supported by the accelerator in the current host";
912 }
913
914 /* Generate type name for a cpu model. Caller has to free the string. */
915 static char *s390_cpu_type_name(const char *model_name)
916 {
917 return g_strdup_printf(S390_CPU_TYPE_NAME("%s"), model_name);
918 }
919
920 /* Generate type name for a base cpu model. Caller has to free the string. */
921 static char *s390_base_cpu_type_name(const char *model_name)
922 {
923 return g_strdup_printf(S390_CPU_TYPE_NAME("%s-base"), model_name);
924 }
925
926 ObjectClass *s390_cpu_class_by_name(const char *name)
927 {
928 char *typename = s390_cpu_type_name(name);
929 ObjectClass *oc;
930
931 oc = object_class_by_name(typename);
932 g_free(typename);
933 return oc;
934 }
935
936 static const TypeInfo qemu_s390_cpu_type_info = {
937 .name = S390_CPU_TYPE_NAME("qemu"),
938 .parent = TYPE_S390_CPU,
939 .instance_init = s390_qemu_cpu_model_initfn,
940 .instance_finalize = s390_cpu_model_finalize,
941 .class_init = s390_qemu_cpu_model_class_init,
942 };
943
944 static const TypeInfo max_s390_cpu_type_info = {
945 .name = S390_CPU_TYPE_NAME("max"),
946 .parent = TYPE_S390_CPU,
947 .instance_init = s390_max_cpu_model_initfn,
948 .instance_finalize = s390_cpu_model_finalize,
949 .class_init = s390_max_cpu_model_class_init,
950 };
951
952 #ifdef CONFIG_KVM
953 static const TypeInfo host_s390_cpu_type_info = {
954 .name = S390_CPU_TYPE_NAME("host"),
955 .parent = S390_CPU_TYPE_NAME("max"),
956 .class_init = s390_host_cpu_model_class_init,
957 };
958 #endif
959
960 static void init_ignored_base_feat(void)
961 {
962 static const int feats[] = {
963 /* MSA subfunctions that could not be available on certain machines */
964 S390_FEAT_KMAC_DEA,
965 S390_FEAT_KMAC_TDEA_128,
966 S390_FEAT_KMAC_TDEA_192,
967 S390_FEAT_KMC_DEA,
968 S390_FEAT_KMC_TDEA_128,
969 S390_FEAT_KMC_TDEA_192,
970 S390_FEAT_KM_DEA,
971 S390_FEAT_KM_TDEA_128,
972 S390_FEAT_KM_TDEA_192,
973 S390_FEAT_KIMD_SHA_1,
974 S390_FEAT_KLMD_SHA_1,
975 /* CSSKE is deprecated on newer generations */
976 S390_FEAT_CONDITIONAL_SSKE,
977 };
978 int i;
979
980 for (i = 0; i < ARRAY_SIZE(feats); i++) {
981 set_bit(feats[i], ignored_base_feat);
982 }
983 }
984
985 static void register_types(void)
986 {
987 static const S390FeatInit qemu_max_init = { S390_FEAT_LIST_QEMU_MAX };
988 int i;
989
990 init_ignored_base_feat();
991
992 /* init all bitmaps from generated data initially */
993 s390_init_feat_bitmap(qemu_max_init, qemu_max_cpu_feat);
994 for (i = 0; i < ARRAY_SIZE(s390_cpu_defs); i++) {
995 s390_init_feat_bitmap(s390_cpu_defs[i].base_init,
996 s390_cpu_defs[i].base_feat);
997 s390_init_feat_bitmap(s390_cpu_defs[i].default_init,
998 s390_cpu_defs[i].default_feat);
999 s390_init_feat_bitmap(s390_cpu_defs[i].full_init,
1000 s390_cpu_defs[i].full_feat);
1001 }
1002
1003 /* initialize the qemu model with the maximum definition ("max" model) */
1004 s390_set_qemu_cpu_model(QEMU_MAX_CPU_TYPE, QEMU_MAX_CPU_GEN,
1005 QEMU_MAX_CPU_EC_GA, qemu_max_init);
1006
1007 for (i = 0; i < ARRAY_SIZE(s390_cpu_defs); i++) {
1008 char *base_name = s390_base_cpu_type_name(s390_cpu_defs[i].name);
1009 TypeInfo ti_base = {
1010 .name = base_name,
1011 .parent = TYPE_S390_CPU,
1012 .instance_init = s390_cpu_model_initfn,
1013 .instance_finalize = s390_cpu_model_finalize,
1014 .class_init = s390_base_cpu_model_class_init,
1015 .class_data = (void *) &s390_cpu_defs[i],
1016 };
1017 char *name = s390_cpu_type_name(s390_cpu_defs[i].name);
1018 TypeInfo ti = {
1019 .name = name,
1020 .parent = TYPE_S390_CPU,
1021 .instance_init = s390_cpu_model_initfn,
1022 .instance_finalize = s390_cpu_model_finalize,
1023 .class_init = s390_cpu_model_class_init,
1024 .class_data = (void *) &s390_cpu_defs[i],
1025 };
1026
1027 type_register_static(&ti_base);
1028 type_register_static(&ti);
1029 g_free(base_name);
1030 g_free(name);
1031 }
1032
1033 type_register_static(&qemu_s390_cpu_type_info);
1034 type_register_static(&max_s390_cpu_type_info);
1035 #ifdef CONFIG_KVM
1036 type_register_static(&host_s390_cpu_type_info);
1037 #endif
1038 }
1039
1040 type_init(register_types)
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