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