This source file includes following definitions.
- kvm_s390_get_ilen
- handle_stop
- handle_validity
- handle_instruction
- inject_prog_on_prog_intercept
- handle_itdb
- handle_prog
- handle_external_interrupt
- handle_mvpg_pei
- handle_partial_execution
- handle_sthyi
- handle_operexc
- kvm_handle_sie_intercept
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11 #include <linux/kvm_host.h>
12 #include <linux/errno.h>
13 #include <linux/pagemap.h>
14
15 #include <asm/kvm_host.h>
16 #include <asm/asm-offsets.h>
17 #include <asm/irq.h>
18 #include <asm/sysinfo.h>
19
20 #include "kvm-s390.h"
21 #include "gaccess.h"
22 #include "trace.h"
23 #include "trace-s390.h"
24
25 u8 kvm_s390_get_ilen(struct kvm_vcpu *vcpu)
26 {
27 struct kvm_s390_sie_block *sie_block = vcpu->arch.sie_block;
28 u8 ilen = 0;
29
30 switch (vcpu->arch.sie_block->icptcode) {
31 case ICPT_INST:
32 case ICPT_INSTPROGI:
33 case ICPT_OPEREXC:
34 case ICPT_PARTEXEC:
35 case ICPT_IOINST:
36
37 ilen = insn_length(vcpu->arch.sie_block->ipa >> 8);
38
39 if (sie_block->icptstatus & 1) {
40 ilen = (sie_block->icptstatus >> 4) & 0x6;
41 if (!ilen)
42 ilen = 4;
43 }
44 break;
45 case ICPT_PROGI:
46
47 ilen = vcpu->arch.sie_block->pgmilc & 0x6;
48 break;
49 }
50 return ilen;
51 }
52
53 static int handle_stop(struct kvm_vcpu *vcpu)
54 {
55 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
56 int rc = 0;
57 uint8_t flags, stop_pending;
58
59 vcpu->stat.exit_stop_request++;
60
61
62 if (kvm_s390_vcpu_has_irq(vcpu, 1))
63 return 0;
64
65
66 spin_lock(&li->lock);
67 flags = li->irq.stop.flags;
68 stop_pending = kvm_s390_is_stop_irq_pending(vcpu);
69 spin_unlock(&li->lock);
70
71 trace_kvm_s390_stop_request(stop_pending, flags);
72 if (!stop_pending)
73 return 0;
74
75 if (flags & KVM_S390_STOP_FLAG_STORE_STATUS) {
76 rc = kvm_s390_vcpu_store_status(vcpu,
77 KVM_S390_STORE_STATUS_NOADDR);
78 if (rc)
79 return rc;
80 }
81
82 if (!kvm_s390_user_cpu_state_ctrl(vcpu->kvm))
83 kvm_s390_vcpu_stop(vcpu);
84 return -EOPNOTSUPP;
85 }
86
87 static int handle_validity(struct kvm_vcpu *vcpu)
88 {
89 int viwhy = vcpu->arch.sie_block->ipb >> 16;
90
91 vcpu->stat.exit_validity++;
92 trace_kvm_s390_intercept_validity(vcpu, viwhy);
93 KVM_EVENT(3, "validity intercept 0x%x for pid %u (kvm 0x%pK)", viwhy,
94 current->pid, vcpu->kvm);
95
96
97 WARN_ONCE(viwhy != 0x44, "kvm: unhandled validity intercept 0x%x\n",
98 viwhy);
99 return -EINVAL;
100 }
101
102 static int handle_instruction(struct kvm_vcpu *vcpu)
103 {
104 vcpu->stat.exit_instruction++;
105 trace_kvm_s390_intercept_instruction(vcpu,
106 vcpu->arch.sie_block->ipa,
107 vcpu->arch.sie_block->ipb);
108
109 switch (vcpu->arch.sie_block->ipa >> 8) {
110 case 0x01:
111 return kvm_s390_handle_01(vcpu);
112 case 0x82:
113 return kvm_s390_handle_lpsw(vcpu);
114 case 0x83:
115 return kvm_s390_handle_diag(vcpu);
116 case 0xaa:
117 return kvm_s390_handle_aa(vcpu);
118 case 0xae:
119 return kvm_s390_handle_sigp(vcpu);
120 case 0xb2:
121 return kvm_s390_handle_b2(vcpu);
122 case 0xb6:
123 return kvm_s390_handle_stctl(vcpu);
124 case 0xb7:
125 return kvm_s390_handle_lctl(vcpu);
126 case 0xb9:
127 return kvm_s390_handle_b9(vcpu);
128 case 0xe3:
129 return kvm_s390_handle_e3(vcpu);
130 case 0xe5:
131 return kvm_s390_handle_e5(vcpu);
132 case 0xeb:
133 return kvm_s390_handle_eb(vcpu);
134 default:
135 return -EOPNOTSUPP;
136 }
137 }
138
139 static int inject_prog_on_prog_intercept(struct kvm_vcpu *vcpu)
140 {
141 struct kvm_s390_pgm_info pgm_info = {
142 .code = vcpu->arch.sie_block->iprcc,
143
144 .flags = KVM_S390_PGM_FLAGS_NO_REWIND,
145 };
146
147 switch (vcpu->arch.sie_block->iprcc & ~PGM_PER) {
148 case PGM_AFX_TRANSLATION:
149 case PGM_ASX_TRANSLATION:
150 case PGM_EX_TRANSLATION:
151 case PGM_LFX_TRANSLATION:
152 case PGM_LSTE_SEQUENCE:
153 case PGM_LSX_TRANSLATION:
154 case PGM_LX_TRANSLATION:
155 case PGM_PRIMARY_AUTHORITY:
156 case PGM_SECONDARY_AUTHORITY:
157 case PGM_SPACE_SWITCH:
158 pgm_info.trans_exc_code = vcpu->arch.sie_block->tecmc;
159 break;
160 case PGM_ALEN_TRANSLATION:
161 case PGM_ALE_SEQUENCE:
162 case PGM_ASTE_INSTANCE:
163 case PGM_ASTE_SEQUENCE:
164 case PGM_ASTE_VALIDITY:
165 case PGM_EXTENDED_AUTHORITY:
166 pgm_info.exc_access_id = vcpu->arch.sie_block->eai;
167 break;
168 case PGM_ASCE_TYPE:
169 case PGM_PAGE_TRANSLATION:
170 case PGM_REGION_FIRST_TRANS:
171 case PGM_REGION_SECOND_TRANS:
172 case PGM_REGION_THIRD_TRANS:
173 case PGM_SEGMENT_TRANSLATION:
174 pgm_info.trans_exc_code = vcpu->arch.sie_block->tecmc;
175 pgm_info.exc_access_id = vcpu->arch.sie_block->eai;
176 pgm_info.op_access_id = vcpu->arch.sie_block->oai;
177 break;
178 case PGM_MONITOR:
179 pgm_info.mon_class_nr = vcpu->arch.sie_block->mcn;
180 pgm_info.mon_code = vcpu->arch.sie_block->tecmc;
181 break;
182 case PGM_VECTOR_PROCESSING:
183 case PGM_DATA:
184 pgm_info.data_exc_code = vcpu->arch.sie_block->dxc;
185 break;
186 case PGM_PROTECTION:
187 pgm_info.trans_exc_code = vcpu->arch.sie_block->tecmc;
188 pgm_info.exc_access_id = vcpu->arch.sie_block->eai;
189 break;
190 default:
191 break;
192 }
193
194 if (vcpu->arch.sie_block->iprcc & PGM_PER) {
195 pgm_info.per_code = vcpu->arch.sie_block->perc;
196 pgm_info.per_atmid = vcpu->arch.sie_block->peratmid;
197 pgm_info.per_address = vcpu->arch.sie_block->peraddr;
198 pgm_info.per_access_id = vcpu->arch.sie_block->peraid;
199 }
200 return kvm_s390_inject_prog_irq(vcpu, &pgm_info);
201 }
202
203
204
205
206
207 static int handle_itdb(struct kvm_vcpu *vcpu)
208 {
209 struct kvm_s390_itdb *itdb;
210 int rc;
211
212 if (!IS_TE_ENABLED(vcpu) || !IS_ITDB_VALID(vcpu))
213 return 0;
214 if (current->thread.per_flags & PER_FLAG_NO_TE)
215 return 0;
216 itdb = (struct kvm_s390_itdb *)vcpu->arch.sie_block->itdba;
217 rc = write_guest_lc(vcpu, __LC_PGM_TDB, itdb, sizeof(*itdb));
218 if (rc)
219 return rc;
220 memset(itdb, 0, sizeof(*itdb));
221
222 return 0;
223 }
224
225 #define per_event(vcpu) (vcpu->arch.sie_block->iprcc & PGM_PER)
226
227 static int handle_prog(struct kvm_vcpu *vcpu)
228 {
229 psw_t psw;
230 int rc;
231
232 vcpu->stat.exit_program_interruption++;
233
234 if (guestdbg_enabled(vcpu) && per_event(vcpu)) {
235 rc = kvm_s390_handle_per_event(vcpu);
236 if (rc)
237 return rc;
238
239 if (vcpu->arch.sie_block->iprcc == 0)
240 return 0;
241 }
242
243 trace_kvm_s390_intercept_prog(vcpu, vcpu->arch.sie_block->iprcc);
244 if (vcpu->arch.sie_block->iprcc == PGM_SPECIFICATION) {
245 rc = read_guest_lc(vcpu, __LC_PGM_NEW_PSW, &psw, sizeof(psw_t));
246 if (rc)
247 return rc;
248
249 if (!is_valid_psw(&psw))
250 return -EOPNOTSUPP;
251 }
252 rc = handle_itdb(vcpu);
253 if (rc)
254 return rc;
255
256 return inject_prog_on_prog_intercept(vcpu);
257 }
258
259
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262
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264
265
266
267 static int handle_external_interrupt(struct kvm_vcpu *vcpu)
268 {
269 u16 eic = vcpu->arch.sie_block->eic;
270 struct kvm_s390_irq irq;
271 psw_t newpsw;
272 int rc;
273
274 vcpu->stat.exit_external_interrupt++;
275
276 rc = read_guest_lc(vcpu, __LC_EXT_NEW_PSW, &newpsw, sizeof(psw_t));
277 if (rc)
278 return rc;
279
280 if ((eic == EXT_IRQ_CLK_COMP || eic == EXT_IRQ_CPU_TIMER) &&
281 (newpsw.mask & PSW_MASK_EXT))
282 return -EOPNOTSUPP;
283
284 switch (eic) {
285 case EXT_IRQ_CLK_COMP:
286 irq.type = KVM_S390_INT_CLOCK_COMP;
287 break;
288 case EXT_IRQ_CPU_TIMER:
289 irq.type = KVM_S390_INT_CPU_TIMER;
290 break;
291 case EXT_IRQ_EXTERNAL_CALL:
292 irq.type = KVM_S390_INT_EXTERNAL_CALL;
293 irq.u.extcall.code = vcpu->arch.sie_block->extcpuaddr;
294 rc = kvm_s390_inject_vcpu(vcpu, &irq);
295
296 if (rc == -EBUSY)
297 return 0;
298 return rc;
299 default:
300 return -EOPNOTSUPP;
301 }
302
303 return kvm_s390_inject_vcpu(vcpu, &irq);
304 }
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307
308
309
310
311
312
313
314 static int handle_mvpg_pei(struct kvm_vcpu *vcpu)
315 {
316 unsigned long srcaddr, dstaddr;
317 int reg1, reg2, rc;
318
319 kvm_s390_get_regs_rre(vcpu, ®1, ®2);
320
321
322 rc = guest_translate_address(vcpu, vcpu->run->s.regs.gprs[reg2],
323 reg2, &srcaddr, GACC_FETCH);
324 if (rc)
325 return kvm_s390_inject_prog_cond(vcpu, rc);
326 rc = kvm_arch_fault_in_page(vcpu, srcaddr, 0);
327 if (rc != 0)
328 return rc;
329
330
331 rc = guest_translate_address(vcpu, vcpu->run->s.regs.gprs[reg1],
332 reg1, &dstaddr, GACC_STORE);
333 if (rc)
334 return kvm_s390_inject_prog_cond(vcpu, rc);
335 rc = kvm_arch_fault_in_page(vcpu, dstaddr, 1);
336 if (rc != 0)
337 return rc;
338
339 kvm_s390_retry_instr(vcpu);
340
341 return 0;
342 }
343
344 static int handle_partial_execution(struct kvm_vcpu *vcpu)
345 {
346 vcpu->stat.exit_pei++;
347
348 if (vcpu->arch.sie_block->ipa == 0xb254)
349 return handle_mvpg_pei(vcpu);
350 if (vcpu->arch.sie_block->ipa >> 8 == 0xae)
351 return kvm_s390_handle_sigp_pei(vcpu);
352
353 return -EOPNOTSUPP;
354 }
355
356
357
358
359
360
361 int handle_sthyi(struct kvm_vcpu *vcpu)
362 {
363 int reg1, reg2, r = 0;
364 u64 code, addr, cc = 0, rc = 0;
365 struct sthyi_sctns *sctns = NULL;
366
367 if (!test_kvm_facility(vcpu->kvm, 74))
368 return kvm_s390_inject_program_int(vcpu, PGM_OPERATION);
369
370 kvm_s390_get_regs_rre(vcpu, ®1, ®2);
371 code = vcpu->run->s.regs.gprs[reg1];
372 addr = vcpu->run->s.regs.gprs[reg2];
373
374 vcpu->stat.instruction_sthyi++;
375 VCPU_EVENT(vcpu, 3, "STHYI: fc: %llu addr: 0x%016llx", code, addr);
376 trace_kvm_s390_handle_sthyi(vcpu, code, addr);
377
378 if (reg1 == reg2 || reg1 & 1 || reg2 & 1)
379 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
380
381 if (code & 0xffff) {
382 cc = 3;
383 rc = 4;
384 goto out;
385 }
386
387 if (addr & ~PAGE_MASK)
388 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
389
390 sctns = (void *)get_zeroed_page(GFP_KERNEL);
391 if (!sctns)
392 return -ENOMEM;
393
394 cc = sthyi_fill(sctns, &rc);
395
396 out:
397 if (!cc) {
398 r = write_guest(vcpu, addr, reg2, sctns, PAGE_SIZE);
399 if (r) {
400 free_page((unsigned long)sctns);
401 return kvm_s390_inject_prog_cond(vcpu, r);
402 }
403 }
404
405 free_page((unsigned long)sctns);
406 vcpu->run->s.regs.gprs[reg2 + 1] = rc;
407 kvm_s390_set_psw_cc(vcpu, cc);
408 return r;
409 }
410
411 static int handle_operexc(struct kvm_vcpu *vcpu)
412 {
413 psw_t oldpsw, newpsw;
414 int rc;
415
416 vcpu->stat.exit_operation_exception++;
417 trace_kvm_s390_handle_operexc(vcpu, vcpu->arch.sie_block->ipa,
418 vcpu->arch.sie_block->ipb);
419
420 if (vcpu->arch.sie_block->ipa == 0xb256)
421 return handle_sthyi(vcpu);
422
423 if (vcpu->arch.sie_block->ipa == 0 && vcpu->kvm->arch.user_instr0)
424 return -EOPNOTSUPP;
425 rc = read_guest_lc(vcpu, __LC_PGM_NEW_PSW, &newpsw, sizeof(psw_t));
426 if (rc)
427 return rc;
428
429
430
431
432
433
434
435
436 oldpsw = vcpu->arch.sie_block->gpsw;
437 if (oldpsw.addr - newpsw.addr <= 6 &&
438 !(newpsw.mask & PSW_MASK_WAIT) &&
439 !(oldpsw.mask & PSW_MASK_PSTATE) &&
440 (newpsw.mask & PSW_MASK_ASC) == (oldpsw.mask & PSW_MASK_ASC) &&
441 (newpsw.mask & PSW_MASK_DAT) == (oldpsw.mask & PSW_MASK_DAT))
442 return -EOPNOTSUPP;
443
444 return kvm_s390_inject_program_int(vcpu, PGM_OPERATION);
445 }
446
447 int kvm_handle_sie_intercept(struct kvm_vcpu *vcpu)
448 {
449 int rc, per_rc = 0;
450
451 if (kvm_is_ucontrol(vcpu->kvm))
452 return -EOPNOTSUPP;
453
454 switch (vcpu->arch.sie_block->icptcode) {
455 case ICPT_EXTREQ:
456 vcpu->stat.exit_external_request++;
457 return 0;
458 case ICPT_IOREQ:
459 vcpu->stat.exit_io_request++;
460 return 0;
461 case ICPT_INST:
462 rc = handle_instruction(vcpu);
463 break;
464 case ICPT_PROGI:
465 return handle_prog(vcpu);
466 case ICPT_EXTINT:
467 return handle_external_interrupt(vcpu);
468 case ICPT_WAIT:
469 return kvm_s390_handle_wait(vcpu);
470 case ICPT_VALIDITY:
471 return handle_validity(vcpu);
472 case ICPT_STOP:
473 return handle_stop(vcpu);
474 case ICPT_OPEREXC:
475 rc = handle_operexc(vcpu);
476 break;
477 case ICPT_PARTEXEC:
478 rc = handle_partial_execution(vcpu);
479 break;
480 case ICPT_KSS:
481 rc = kvm_s390_skey_check_enable(vcpu);
482 break;
483 default:
484 return -EOPNOTSUPP;
485 }
486
487
488 if (vcpu->arch.sie_block->icptstatus & 0x02 &&
489 (!rc || rc == -EOPNOTSUPP))
490 per_rc = kvm_s390_handle_per_ifetch_icpt(vcpu);
491 return per_rc ? per_rc : rc;
492 }