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Merge remote-tracking branches 'asoc/fix/max98371', 'asoc/fix/nau8825', 'asoc/fix...
[linux-2.6-block.git] / arch / s390 / kvm / priv.c
CommitLineData
453423dc 1/*
a53c8fab 2 * handling privileged instructions
453423dc 3 *
69d0d3a3 4 * Copyright IBM Corp. 2008, 2013
453423dc
CB		 5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License (version 2 only)
8 * as published by the Free Software Foundation.
9 *
10 * Author(s): Carsten Otte <cotte@de.ibm.com>
11 * Christian Borntraeger <borntraeger@de.ibm.com>
12 */
13
14#include <linux/kvm.h>
5a0e3ad6 15#include <linux/gfp.h>
453423dc 16#include <linux/errno.h>
b13b5dc7 17#include <linux/compat.h>
7c959e82 18#include <asm/asm-offsets.h>
e769ece3 19#include <asm/facility.h>
453423dc
CB		 20#include <asm/current.h>
21#include <asm/debug.h>
22#include <asm/ebcdic.h>
23#include <asm/sysinfo.h>
69d0d3a3
CB		 24#include <asm/pgtable.h>
25#include <asm/pgalloc.h>
1e133ab2 26#include <asm/gmap.h>
69d0d3a3 27#include <asm/io.h>
48a3e950
CH		 28#include <asm/ptrace.h>
29#include <asm/compat.h>
a7e19ab5 30#include <asm/sclp.h>
453423dc
CB		 31#include "gaccess.h"
32#include "kvm-s390.h"
5786fffa 33#include "trace.h"
453423dc 34
6a3f95a6
TH		 35/* Handle SCK (SET CLOCK) interception */
36static int handle_set_clock(struct kvm_vcpu *vcpu)
37{
25ed1675 38 int rc;
8ae04b8f 39 ar_t ar;
25ed1675 40 u64 op2, val;
6a3f95a6
TH		 41
42 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
43 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
44
8ae04b8f 45 op2 = kvm_s390_get_base_disp_s(vcpu, &ar);
6a3f95a6
TH		 46 if (op2 & 7) /* Operand must be on a doubleword boundary */
47 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
8ae04b8f 48 rc = read_guest(vcpu, op2, ar, &val, sizeof(val));
0e7a3f94
HC		 49 if (rc)
50 return kvm_s390_inject_prog_cond(vcpu, rc);
6a3f95a6 51
7cbde76b 52 VCPU_EVENT(vcpu, 3, "SCK: setting guest TOD to 0x%llx", val);
25ed1675 53 kvm_s390_set_tod_clock(vcpu->kvm, val);
6a3f95a6
TH		 54
55 kvm_s390_set_psw_cc(vcpu, 0);
56 return 0;
57}
58
453423dc
CB		 59static int handle_set_prefix(struct kvm_vcpu *vcpu)
60{
453423dc 61 u64 operand2;
665170cb
HC		 62 u32 address;
63 int rc;
8ae04b8f 64 ar_t ar;
453423dc
CB		 65
66 vcpu->stat.instruction_spx++;
67
5087dfa6
TH		 68 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
69 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
70
8ae04b8f 71 operand2 = kvm_s390_get_base_disp_s(vcpu, &ar);
453423dc
CB		 72
73 /* must be word boundary */
db4a29cb
HC		 74 if (operand2 & 3)
75 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
453423dc
CB		 76
77 /* get the value */
8ae04b8f 78 rc = read_guest(vcpu, operand2, ar, &address, sizeof(address));
665170cb
HC		 79 if (rc)
80 return kvm_s390_inject_prog_cond(vcpu, rc);
81
82 address &= 0x7fffe000u;
83
84 /*
85 * Make sure the new value is valid memory. We only need to check the
86 * first page, since address is 8k aligned and memory pieces are always
87 * at least 1MB aligned and have at least a size of 1MB.
88 */
89 if (kvm_is_error_gpa(vcpu->kvm, address))
db4a29cb 90 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
453423dc 91
8d26cf7b 92 kvm_s390_set_prefix(vcpu, address);
5786fffa 93 trace_kvm_s390_handle_prefix(vcpu, 1, address);
453423dc
CB		 94 return 0;
95}
96
97static int handle_store_prefix(struct kvm_vcpu *vcpu)
98{
453423dc
CB		 99 u64 operand2;
100 u32 address;
f748f4a7 101 int rc;
8ae04b8f 102 ar_t ar;
453423dc
CB		 103
104 vcpu->stat.instruction_stpx++;
b1c571a5 105
5087dfa6
TH		 106 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
107 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
108
8ae04b8f 109 operand2 = kvm_s390_get_base_disp_s(vcpu, &ar);
453423dc
CB		 110
111 /* must be word boundary */
db4a29cb
HC		 112 if (operand2 & 3)
113 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
453423dc 114
fda902cb 115 address = kvm_s390_get_prefix(vcpu);
453423dc
CB		 116
117 /* get the value */
8ae04b8f 118 rc = write_guest(vcpu, operand2, ar, &address, sizeof(address));
f748f4a7
HC		 119 if (rc)
120 return kvm_s390_inject_prog_cond(vcpu, rc);
453423dc 121
7cbde76b 122 VCPU_EVENT(vcpu, 3, "STPX: storing prefix 0x%x into 0x%llx", address, operand2);
5786fffa 123 trace_kvm_s390_handle_prefix(vcpu, 0, address);
453423dc
CB		 124 return 0;
125}
126
127static int handle_store_cpu_address(struct kvm_vcpu *vcpu)
128{
8b96de0e
HC		 129 u16 vcpu_id = vcpu->vcpu_id;
130 u64 ga;
131 int rc;
8ae04b8f 132 ar_t ar;
453423dc
CB		 133
134 vcpu->stat.instruction_stap++;
b1c571a5 135
5087dfa6
TH		 136 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
137 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
138
8ae04b8f 139 ga = kvm_s390_get_base_disp_s(vcpu, &ar);
453423dc 140
8b96de0e 141 if (ga & 1)
db4a29cb 142 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
453423dc 143
8ae04b8f 144 rc = write_guest(vcpu, ga, ar, &vcpu_id, sizeof(vcpu_id));
8b96de0e
HC		 145 if (rc)
146 return kvm_s390_inject_prog_cond(vcpu, rc);
453423dc 147
7cbde76b 148 VCPU_EVENT(vcpu, 3, "STAP: storing cpu address (%u) to 0x%llx", vcpu_id, ga);
8b96de0e 149 trace_kvm_s390_handle_stap(vcpu, ga);
453423dc
CB		 150 return 0;
151}
152
3ac8e380 153static int __skey_check_enable(struct kvm_vcpu *vcpu)
693ffc08 154{
3ac8e380 155 int rc = 0;
11ddcd41
DH		 156
157 trace_kvm_s390_skey_related_inst(vcpu);
693ffc08 158 if (!(vcpu->arch.sie_block->ictl & (ICTL_ISKE | ICTL_SSKE | ICTL_RRBE)))
3ac8e380 159 return rc;
693ffc08 160
3ac8e380 161 rc = s390_enable_skey();
11ddcd41
DH		 162 VCPU_EVENT(vcpu, 3, "enabling storage keys for guest: %d", rc);
163 if (!rc)
164 vcpu->arch.sie_block->ictl &= ~(ICTL_ISKE | ICTL_SSKE | ICTL_RRBE);
3ac8e380 165 return rc;
693ffc08
DD		 166}
167
a7e19ab5 168static int try_handle_skey(struct kvm_vcpu *vcpu)
453423dc 169{
11ddcd41 170 int rc;
693ffc08 171
11ddcd41
DH		 172 vcpu->stat.instruction_storage_key++;
173 rc = __skey_check_enable(vcpu);
3ac8e380
DD		 174 if (rc)
175 return rc;
a7e19ab5
DH		 176 if (sclp.has_skey) {
177 /* with storage-key facility, SIE interprets it for us */
178 kvm_s390_retry_instr(vcpu);
179 VCPU_EVENT(vcpu, 4, "%s", "retrying storage key operation");
180 return -EAGAIN;
181 }
5087dfa6
TH		 182 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
183 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
a7e19ab5
DH		 184 return 0;
185}
5087dfa6 186
a7e19ab5
DH		 187static int handle_iske(struct kvm_vcpu *vcpu)
188{
189 unsigned long addr;
190 unsigned char key;
191 int reg1, reg2;
192 int rc;
193
194 rc = try_handle_skey(vcpu);
195 if (rc)
196 return rc != -EAGAIN ? rc : 0;
197
198 kvm_s390_get_regs_rre(vcpu, &reg1, &reg2);
199
200 addr = vcpu->run->s.regs.gprs[reg2] & PAGE_MASK;
201 addr = kvm_s390_logical_to_effective(vcpu, addr);
202 addr = kvm_s390_real_to_abs(vcpu, addr);
203 addr = gfn_to_hva(vcpu->kvm, gpa_to_gfn(addr));
204 if (kvm_is_error_hva(addr))
205 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
206
207 down_read(&current->mm->mmap_sem);
208 rc = get_guest_storage_key(current->mm, addr, &key);
209 up_read(&current->mm->mmap_sem);
210 if (rc)
211 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
212 vcpu->run->s.regs.gprs[reg1] &= ~0xff;
213 vcpu->run->s.regs.gprs[reg1] |= key;
214 return 0;
215}
216
217static int handle_rrbe(struct kvm_vcpu *vcpu)
218{
219 unsigned long addr;
220 int reg1, reg2;
221 int rc;
222
223 rc = try_handle_skey(vcpu);
224 if (rc)
225 return rc != -EAGAIN ? rc : 0;
226
227 kvm_s390_get_regs_rre(vcpu, &reg1, &reg2);
228
229 addr = vcpu->run->s.regs.gprs[reg2] & PAGE_MASK;
230 addr = kvm_s390_logical_to_effective(vcpu, addr);
231 addr = kvm_s390_real_to_abs(vcpu, addr);
232 addr = gfn_to_hva(vcpu->kvm, gpa_to_gfn(addr));
233 if (kvm_is_error_hva(addr))
234 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
235
236 down_read(&current->mm->mmap_sem);
237 rc = reset_guest_reference_bit(current->mm, addr);
238 up_read(&current->mm->mmap_sem);
239 if (rc < 0)
240 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
241
242 kvm_s390_set_psw_cc(vcpu, rc);
243 return 0;
244}
245
246#define SSKE_NQ 0x8
247#define SSKE_MR 0x4
248#define SSKE_MC 0x2
249#define SSKE_MB 0x1
250static int handle_sske(struct kvm_vcpu *vcpu)
251{
252 unsigned char m3 = vcpu->arch.sie_block->ipb >> 28;
253 unsigned long start, end;
254 unsigned char key, oldkey;
255 int reg1, reg2;
256 int rc;
257
258 rc = try_handle_skey(vcpu);
259 if (rc)
260 return rc != -EAGAIN ? rc : 0;
261
262 if (!test_kvm_facility(vcpu->kvm, 8))
263 m3 &= ~SSKE_MB;
264 if (!test_kvm_facility(vcpu->kvm, 10))
265 m3 &= ~(SSKE_MC | SSKE_MR);
266 if (!test_kvm_facility(vcpu->kvm, 14))
267 m3 &= ~SSKE_NQ;
268
269 kvm_s390_get_regs_rre(vcpu, &reg1, &reg2);
270
271 key = vcpu->run->s.regs.gprs[reg1] & 0xfe;
272 start = vcpu->run->s.regs.gprs[reg2] & PAGE_MASK;
273 start = kvm_s390_logical_to_effective(vcpu, start);
274 if (m3 & SSKE_MB) {
275 /* start already designates an absolute address */
276 end = (start + (1UL << 20)) & ~((1UL << 20) - 1);
277 } else {
278 start = kvm_s390_real_to_abs(vcpu, start);
279 end = start + PAGE_SIZE;
280 }
281
282 while (start != end) {
283 unsigned long addr = gfn_to_hva(vcpu->kvm, gpa_to_gfn(start));
284
285 if (kvm_is_error_hva(addr))
286 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
287
288 down_read(&current->mm->mmap_sem);
289 rc = cond_set_guest_storage_key(current->mm, addr, key, &oldkey,
290 m3 & SSKE_NQ, m3 & SSKE_MR,
291 m3 & SSKE_MC);
292 up_read(&current->mm->mmap_sem);
293 if (rc < 0)
294 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
295 start += PAGE_SIZE;
296 };
297
298 if (m3 & (SSKE_MC | SSKE_MR)) {
299 if (m3 & SSKE_MB) {
300 /* skey in reg1 is unpredictable */
301 kvm_s390_set_psw_cc(vcpu, 3);
302 } else {
303 kvm_s390_set_psw_cc(vcpu, rc);
304 vcpu->run->s.regs.gprs[reg1] &= ~0xff00UL;
305 vcpu->run->s.regs.gprs[reg1] |= (u64) oldkey << 8;
306 }
307 }
308 if (m3 & SSKE_MB) {
309 if (psw_bits(vcpu->arch.sie_block->gpsw).eaba == PSW_AMODE_64BIT)
310 vcpu->run->s.regs.gprs[reg2] &= ~PAGE_MASK;
311 else
312 vcpu->run->s.regs.gprs[reg2] &= ~0xfffff000UL;
313 end = kvm_s390_logical_to_effective(vcpu, end);
314 vcpu->run->s.regs.gprs[reg2] |= end;
315 }
453423dc
CB		 316 return 0;
317}
318
8a242234
HC		 319static int handle_ipte_interlock(struct kvm_vcpu *vcpu)
320{
8a242234 321 vcpu->stat.instruction_ipte_interlock++;
04b41acd 322 if (psw_bits(vcpu->arch.sie_block->gpsw).p)
8a242234
HC		 323 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
324 wait_event(vcpu->kvm->arch.ipte_wq, !ipte_lock_held(vcpu));
0e8bc06a 325 kvm_s390_retry_instr(vcpu);
8a242234
HC		 326 VCPU_EVENT(vcpu, 4, "%s", "retrying ipte interlock operation");
327 return 0;
328}
329
aca84241
TH		 330static int handle_test_block(struct kvm_vcpu *vcpu)
331{
aca84241
TH		 332 gpa_t addr;
333 int reg2;
334
335 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
336 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
337
338 kvm_s390_get_regs_rre(vcpu, NULL, &reg2);
339 addr = vcpu->run->s.regs.gprs[reg2] & PAGE_MASK;
e45efa28 340 addr = kvm_s390_logical_to_effective(vcpu, addr);
dd9e5b7b 341 if (kvm_s390_check_low_addr_prot_real(vcpu, addr))
e45efa28 342 return kvm_s390_inject_prog_irq(vcpu, &vcpu->arch.pgm);
aca84241
TH		 343 addr = kvm_s390_real_to_abs(vcpu, addr);
344
ef23e779 345 if (kvm_is_error_gpa(vcpu->kvm, addr))
aca84241
TH		 346 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
347 /*
348 * We don't expect errors on modern systems, and do not care
349 * about storage keys (yet), so let's just clear the page.
350 */
ef23e779 351 if (kvm_clear_guest(vcpu->kvm, addr, PAGE_SIZE))
aca84241
TH		 352 return -EFAULT;
353 kvm_s390_set_psw_cc(vcpu, 0);
354 vcpu->run->s.regs.gprs[0] = 0;
355 return 0;
356}
357
fa6b7fe9 358static int handle_tpi(struct kvm_vcpu *vcpu)
453423dc 359{
fa6b7fe9 360 struct kvm_s390_interrupt_info *inti;
4799b557
HC		 361 unsigned long len;
362 u32 tpi_data[3];
261520dc 363 int rc;
7c959e82 364 u64 addr;
8ae04b8f 365 ar_t ar;
fa6b7fe9 366
8ae04b8f 367 addr = kvm_s390_get_base_disp_s(vcpu, &ar);
db4a29cb
HC		 368 if (addr & 3)
369 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
261520dc 370
f092669e 371 inti = kvm_s390_get_io_int(vcpu->kvm, vcpu->arch.sie_block->gcr[6], 0);
261520dc
DH		 372 if (!inti) {
373 kvm_s390_set_psw_cc(vcpu, 0);
374 return 0;
375 }
376
4799b557
HC		 377 tpi_data[0] = inti->io.subchannel_id << 16 | inti->io.subchannel_nr;
378 tpi_data[1] = inti->io.io_int_parm;
379 tpi_data[2] = inti->io.io_int_word;
7c959e82
HC		 380 if (addr) {
381 /*
382 * Store the two-word I/O interruption code into the
383 * provided area.
384 */
4799b557 385 len = sizeof(tpi_data) - 4;
8ae04b8f 386 rc = write_guest(vcpu, addr, ar, &tpi_data, len);
261520dc
DH		 387 if (rc) {
388 rc = kvm_s390_inject_prog_cond(vcpu, rc);
389 goto reinject_interrupt;
390 }
7c959e82
HC		 391 } else {
392 /*
393 * Store the three-word I/O interruption code into
394 * the appropriate lowcore area.
395 */
4799b557 396 len = sizeof(tpi_data);
261520dc
DH		 397 if (write_guest_lc(vcpu, __LC_SUBCHANNEL_ID, &tpi_data, len)) {
398 /* failed writes to the low core are not recoverable */
4799b557 399 rc = -EFAULT;
261520dc
DH		 400 goto reinject_interrupt;
401 }
7c959e82 402 }
261520dc
DH		 403
404 /* irq was successfully handed to the guest */
405 kfree(inti);
406 kvm_s390_set_psw_cc(vcpu, 1);
407 return 0;
408reinject_interrupt:
2f32d4ea
CH		 409 /*
410 * If we encounter a problem storing the interruption code, the
411 * instruction is suppressed from the guest's view: reinject the
412 * interrupt.
413 */
15462e37
DH		 414 if (kvm_s390_reinject_io_int(vcpu->kvm, inti)) {
415 kfree(inti);
416 rc = -EFAULT;
417 }
261520dc 418 /* don't set the cc, a pgm irq was injected or we drop to user space */
4799b557 419 return rc ? -EFAULT : 0;
453423dc
CB		 420}
421
fa6b7fe9
CH		 422static int handle_tsch(struct kvm_vcpu *vcpu)
423{
6d3da241
JF		 424 struct kvm_s390_interrupt_info *inti = NULL;
425 const u64 isc_mask = 0xffUL << 24; /* all iscs set */
fa6b7fe9 426
6d3da241
JF		 427 /* a valid schid has at least one bit set */
428 if (vcpu->run->s.regs.gprs[1])
429 inti = kvm_s390_get_io_int(vcpu->kvm, isc_mask,
430 vcpu->run->s.regs.gprs[1]);
fa6b7fe9
CH		 431
432 /*
433 * Prepare exit to userspace.
434 * We indicate whether we dequeued a pending I/O interrupt
435 * so that userspace can re-inject it if the instruction gets
436 * a program check. While this may re-order the pending I/O
437 * interrupts, this is no problem since the priority is kept
438 * intact.
439 */
440 vcpu->run->exit_reason = KVM_EXIT_S390_TSCH;
441 vcpu->run->s390_tsch.dequeued = !!inti;
442 if (inti) {
443 vcpu->run->s390_tsch.subchannel_id = inti->io.subchannel_id;
444 vcpu->run->s390_tsch.subchannel_nr = inti->io.subchannel_nr;
445 vcpu->run->s390_tsch.io_int_parm = inti->io.io_int_parm;
446 vcpu->run->s390_tsch.io_int_word = inti->io.io_int_word;
447 }
448 vcpu->run->s390_tsch.ipb = vcpu->arch.sie_block->ipb;
449 kfree(inti);
450 return -EREMOTE;
451}
452
453static int handle_io_inst(struct kvm_vcpu *vcpu)
454{
455 VCPU_EVENT(vcpu, 4, "%s", "I/O instruction");
456
5087dfa6
TH		 457 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
458 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
459
fa6b7fe9
CH		 460 if (vcpu->kvm->arch.css_support) {
461 /*
462 * Most I/O instructions will be handled by userspace.
463 * Exceptions are tpi and the interrupt portion of tsch.
464 */
465 if (vcpu->arch.sie_block->ipa == 0xb236)
466 return handle_tpi(vcpu);
467 if (vcpu->arch.sie_block->ipa == 0xb235)
468 return handle_tsch(vcpu);
469 /* Handle in userspace. */
470 return -EOPNOTSUPP;
471 } else {
472 /*
b4a96015 473 * Set condition code 3 to stop the guest from issuing channel
fa6b7fe9
CH		 474 * I/O instructions.
475 */
ea828ebf 476 kvm_s390_set_psw_cc(vcpu, 3);
fa6b7fe9
CH		 477 return 0;
478 }
479}
480
453423dc
CB		 481static int handle_stfl(struct kvm_vcpu *vcpu)
482{
453423dc 483 int rc;
9d8d5786 484 unsigned int fac;
453423dc
CB		 485
486 vcpu->stat.instruction_stfl++;
5087dfa6
TH		 487
488 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
489 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
490
9d8d5786
MM		 491 /*
492 * We need to shift the lower 32 facility bits (bit 0-31) from a u64
493 * into a u32 memory representation. They will remain bits 0-31.
494 */
c54f0d6a 495 fac = *vcpu->kvm->arch.model.fac_list >> 32;
c667aeac 496 rc = write_guest_lc(vcpu, offsetof(struct lowcore, stfl_fac_list),
9d8d5786 497 &fac, sizeof(fac));
dc5008b9 498 if (rc)
0f9701c6 499 return rc;
7cbde76b 500 VCPU_EVENT(vcpu, 3, "STFL: store facility list 0x%x", fac);
9d8d5786 501 trace_kvm_s390_handle_stfl(vcpu, fac);
453423dc
CB		 502 return 0;
503}
504
48a3e950
CH		 505#define PSW_MASK_ADDR_MODE (PSW_MASK_EA | PSW_MASK_BA)
506#define PSW_MASK_UNASSIGNED 0xb80800fe7fffffffUL
d21683ea 507#define PSW_ADDR_24 0x0000000000ffffffUL
48a3e950
CH		 508#define PSW_ADDR_31 0x000000007fffffffUL
509
a3fb577e
TH		 510int is_valid_psw(psw_t *psw)
511{
3736b874
HC		 512 if (psw->mask & PSW_MASK_UNASSIGNED)
513 return 0;
514 if ((psw->mask & PSW_MASK_ADDR_MODE) == PSW_MASK_BA) {
515 if (psw->addr & ~PSW_ADDR_31)
516 return 0;
517 }
518 if (!(psw->mask & PSW_MASK_ADDR_MODE) && (psw->addr & ~PSW_ADDR_24))
519 return 0;
520 if ((psw->mask & PSW_MASK_ADDR_MODE) == PSW_MASK_EA)
521 return 0;
a3fb577e
TH		 522 if (psw->addr & 1)
523 return 0;
3736b874
HC		 524 return 1;
525}
526
48a3e950
CH		 527int kvm_s390_handle_lpsw(struct kvm_vcpu *vcpu)
528{
3736b874 529 psw_t *gpsw = &vcpu->arch.sie_block->gpsw;
48a3e950 530 psw_compat_t new_psw;
3736b874 531 u64 addr;
2d8bcaed 532 int rc;
8ae04b8f 533 ar_t ar;
48a3e950 534
3736b874 535 if (gpsw->mask & PSW_MASK_PSTATE)
208dd756
TH		 536 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
537
8ae04b8f 538 addr = kvm_s390_get_base_disp_s(vcpu, &ar);
6fd0fcc9
HC		 539 if (addr & 7)
540 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
2d8bcaed 541
8ae04b8f 542 rc = read_guest(vcpu, addr, ar, &new_psw, sizeof(new_psw));
2d8bcaed
HC		 543 if (rc)
544 return kvm_s390_inject_prog_cond(vcpu, rc);
6fd0fcc9
HC		 545 if (!(new_psw.mask & PSW32_MASK_BASE))
546 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
3736b874
HC		 547 gpsw->mask = (new_psw.mask & ~PSW32_MASK_BASE) << 32;
548 gpsw->mask |= new_psw.addr & PSW32_ADDR_AMODE;
549 gpsw->addr = new_psw.addr & ~PSW32_ADDR_AMODE;
550 if (!is_valid_psw(gpsw))
6fd0fcc9 551 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
48a3e950
CH		 552 return 0;
553}
554
555static int handle_lpswe(struct kvm_vcpu *vcpu)
556{
48a3e950 557 psw_t new_psw;
3736b874 558 u64 addr;
2d8bcaed 559 int rc;
8ae04b8f 560 ar_t ar;
48a3e950 561
5087dfa6
TH		 562 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
563 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
564
8ae04b8f 565 addr = kvm_s390_get_base_disp_s(vcpu, &ar);
6fd0fcc9
HC		 566 if (addr & 7)
567 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
8ae04b8f 568 rc = read_guest(vcpu, addr, ar, &new_psw, sizeof(new_psw));
2d8bcaed
HC		 569 if (rc)
570 return kvm_s390_inject_prog_cond(vcpu, rc);
3736b874
HC		 571 vcpu->arch.sie_block->gpsw = new_psw;
572 if (!is_valid_psw(&vcpu->arch.sie_block->gpsw))
6fd0fcc9 573 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
48a3e950
CH		 574 return 0;
575}
576
453423dc
CB		 577static int handle_stidp(struct kvm_vcpu *vcpu)
578{
9bb0ec09 579 u64 stidp_data = vcpu->kvm->arch.model.cpuid;
453423dc 580 u64 operand2;
7d777d78 581 int rc;
8ae04b8f 582 ar_t ar;
453423dc
CB		 583
584 vcpu->stat.instruction_stidp++;
b1c571a5 585
5087dfa6
TH		 586 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
587 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
588
8ae04b8f 589 operand2 = kvm_s390_get_base_disp_s(vcpu, &ar);
453423dc 590
db4a29cb
HC		 591 if (operand2 & 7)
592 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
453423dc 593
8ae04b8f 594 rc = write_guest(vcpu, operand2, ar, &stidp_data, sizeof(stidp_data));
7d777d78
HC		 595 if (rc)
596 return kvm_s390_inject_prog_cond(vcpu, rc);
453423dc 597
7cbde76b 598 VCPU_EVENT(vcpu, 3, "STIDP: store cpu id 0x%llx", stidp_data);
453423dc
CB		 599 return 0;
600}
601
602static void handle_stsi_3_2_2(struct kvm_vcpu *vcpu, struct sysinfo_3_2_2 *mem)
603{
453423dc
CB		 604 int cpus = 0;
605 int n;
606
ff520a63 607 cpus = atomic_read(&vcpu->kvm->online_vcpus);
453423dc
CB		 608
609 /* deal with other level 3 hypervisors */
caf757c6 610 if (stsi(mem, 3, 2, 2))
453423dc
CB		 611 mem->count = 0;
612 if (mem->count < 8)
613 mem->count++;
614 for (n = mem->count - 1; n > 0 ; n--)
615 memcpy(&mem->vm[n], &mem->vm[n - 1], sizeof(mem->vm[0]));
616
b75f4c9a 617 memset(&mem->vm[0], 0, sizeof(mem->vm[0]));
453423dc
CB		 618 mem->vm[0].cpus_total = cpus;
619 mem->vm[0].cpus_configured = cpus;
620 mem->vm[0].cpus_standby = 0;
621 mem->vm[0].cpus_reserved = 0;
622 mem->vm[0].caf = 1000;
623 memcpy(mem->vm[0].name, "KVMguest", 8);
624 ASCEBC(mem->vm[0].name, 8);
625 memcpy(mem->vm[0].cpi, "KVM/Linux ", 16);
626 ASCEBC(mem->vm[0].cpi, 16);
627}
628
e44fc8c9
ET		 629static void insert_stsi_usr_data(struct kvm_vcpu *vcpu, u64 addr, ar_t ar,
630 u8 fc, u8 sel1, u16 sel2)
631{
632 vcpu->run->exit_reason = KVM_EXIT_S390_STSI;
633 vcpu->run->s390_stsi.addr = addr;
634 vcpu->run->s390_stsi.ar = ar;
635 vcpu->run->s390_stsi.fc = fc;
636 vcpu->run->s390_stsi.sel1 = sel1;
637 vcpu->run->s390_stsi.sel2 = sel2;
638}
639
453423dc
CB		 640static int handle_stsi(struct kvm_vcpu *vcpu)
641{
5a32c1af
CB		 642 int fc = (vcpu->run->s.regs.gprs[0] & 0xf0000000) >> 28;
643 int sel1 = vcpu->run->s.regs.gprs[0] & 0xff;
644 int sel2 = vcpu->run->s.regs.gprs[1] & 0xffff;
c51f068c 645 unsigned long mem = 0;
453423dc 646 u64 operand2;
db4a29cb 647 int rc = 0;
8ae04b8f 648 ar_t ar;
453423dc
CB		 649
650 vcpu->stat.instruction_stsi++;
7cbde76b 651 VCPU_EVENT(vcpu, 3, "STSI: fc: %u sel1: %u sel2: %u", fc, sel1, sel2);
453423dc 652
5087dfa6
TH		 653 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
654 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
655
87d41fb4 656 if (fc > 3) {
ea828ebf 657 kvm_s390_set_psw_cc(vcpu, 3);
87d41fb4
TH		 658 return 0;
659 }
453423dc 660
87d41fb4
TH		 661 if (vcpu->run->s.regs.gprs[0] & 0x0fffff00
662 || vcpu->run->s.regs.gprs[1] & 0xffff0000)
453423dc
CB		 663 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
664
87d41fb4 665 if (fc == 0) {
5a32c1af 666 vcpu->run->s.regs.gprs[0] = 3 << 28;
ea828ebf 667 kvm_s390_set_psw_cc(vcpu, 0);
453423dc 668 return 0;
87d41fb4
TH		 669 }
670
8ae04b8f 671 operand2 = kvm_s390_get_base_disp_s(vcpu, &ar);
87d41fb4
TH		 672
673 if (operand2 & 0xfff)
674 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
675
676 switch (fc) {
453423dc
CB		 677 case 1: /* same handling for 1 and 2 */
678 case 2:
679 mem = get_zeroed_page(GFP_KERNEL);
680 if (!mem)
c51f068c 681 goto out_no_data;
caf757c6 682 if (stsi((void *) mem, fc, sel1, sel2))
c51f068c 683 goto out_no_data;
453423dc
CB		 684 break;
685 case 3:
686 if (sel1 != 2 || sel2 != 2)
c51f068c 687 goto out_no_data;
453423dc
CB		 688 mem = get_zeroed_page(GFP_KERNEL);
689 if (!mem)
c51f068c 690 goto out_no_data;
453423dc
CB		 691 handle_stsi_3_2_2(vcpu, (void *) mem);
692 break;
453423dc
CB		 693 }
694
8ae04b8f 695 rc = write_guest(vcpu, operand2, ar, (void *)mem, PAGE_SIZE);
645c5bc1
HC		 696 if (rc) {
697 rc = kvm_s390_inject_prog_cond(vcpu, rc);
698 goto out;
453423dc 699 }
e44fc8c9
ET		 700 if (vcpu->kvm->arch.user_stsi) {
701 insert_stsi_usr_data(vcpu, operand2, ar, fc, sel1, sel2);
702 rc = -EREMOTE;
703 }
5786fffa 704 trace_kvm_s390_handle_stsi(vcpu, fc, sel1, sel2, operand2);
453423dc 705 free_page(mem);
ea828ebf 706 kvm_s390_set_psw_cc(vcpu, 0);
5a32c1af 707 vcpu->run->s.regs.gprs[0] = 0;
e44fc8c9 708 return rc;
c51f068c 709out_no_data:
ea828ebf 710 kvm_s390_set_psw_cc(vcpu, 3);
645c5bc1 711out:
c51f068c 712 free_page(mem);
db4a29cb 713 return rc;
453423dc
CB		 714}
715
f379aae5 716static const intercept_handler_t b2_handlers[256] = {
453423dc 717 [0x02] = handle_stidp,
6a3f95a6 718 [0x04] = handle_set_clock,
453423dc
CB		 719 [0x10] = handle_set_prefix,
720 [0x11] = handle_store_prefix,
721 [0x12] = handle_store_cpu_address,
a3508fbe 722 [0x14] = kvm_s390_handle_vsie,
8a242234 723 [0x21] = handle_ipte_interlock,
a7e19ab5
DH		 724 [0x29] = handle_iske,
725 [0x2a] = handle_rrbe,
726 [0x2b] = handle_sske,
aca84241 727 [0x2c] = handle_test_block,
f379aae5
CH		 728 [0x30] = handle_io_inst,
729 [0x31] = handle_io_inst,
730 [0x32] = handle_io_inst,
731 [0x33] = handle_io_inst,
732 [0x34] = handle_io_inst,
733 [0x35] = handle_io_inst,
734 [0x36] = handle_io_inst,
735 [0x37] = handle_io_inst,
736 [0x38] = handle_io_inst,
737 [0x39] = handle_io_inst,
738 [0x3a] = handle_io_inst,
739 [0x3b] = handle_io_inst,
740 [0x3c] = handle_io_inst,
8a242234 741 [0x50] = handle_ipte_interlock,
f379aae5
CH		 742 [0x5f] = handle_io_inst,
743 [0x74] = handle_io_inst,
744 [0x76] = handle_io_inst,
453423dc
CB		 745 [0x7d] = handle_stsi,
746 [0xb1] = handle_stfl,
48a3e950 747 [0xb2] = handle_lpswe,
453423dc
CB		 748};
749
70455a36 750int kvm_s390_handle_b2(struct kvm_vcpu *vcpu)
453423dc
CB		 751{
752 intercept_handler_t handler;
753
70455a36 754 /*
5087dfa6
TH		 755 * A lot of B2 instructions are priviledged. Here we check for
756 * the privileged ones, that we can handle in the kernel.
757 * Anything else goes to userspace.
758 */
f379aae5 759 handler = b2_handlers[vcpu->arch.sie_block->ipa & 0x00ff];
5087dfa6
TH		 760 if (handler)
761 return handler(vcpu);
762
b8e660b8 763 return -EOPNOTSUPP;
453423dc 764}
bb25b9ba 765
48a3e950
CH		 766static int handle_epsw(struct kvm_vcpu *vcpu)
767{
768 int reg1, reg2;
769
aeb87c3c 770 kvm_s390_get_regs_rre(vcpu, &reg1, &reg2);
48a3e950
CH		 771
772 /* This basically extracts the mask half of the psw. */
843200e7 773 vcpu->run->s.regs.gprs[reg1] &= 0xffffffff00000000UL;
48a3e950
CH		 774 vcpu->run->s.regs.gprs[reg1] |= vcpu->arch.sie_block->gpsw.mask >> 32;
775 if (reg2) {
843200e7 776 vcpu->run->s.regs.gprs[reg2] &= 0xffffffff00000000UL;
48a3e950 777 vcpu->run->s.regs.gprs[reg2] |=
843200e7 778 vcpu->arch.sie_block->gpsw.mask & 0x00000000ffffffffUL;
48a3e950
CH		 779 }
780 return 0;
781}
782
69d0d3a3
CB		 783#define PFMF_RESERVED 0xfffc0101UL
784#define PFMF_SK 0x00020000UL
785#define PFMF_CF 0x00010000UL
786#define PFMF_UI 0x00008000UL
787#define PFMF_FSC 0x00007000UL
788#define PFMF_NQ 0x00000800UL
789#define PFMF_MR 0x00000400UL
790#define PFMF_MC 0x00000200UL
791#define PFMF_KEY 0x000000feUL
792
793static int handle_pfmf(struct kvm_vcpu *vcpu)
794{
1824c723 795 bool mr = false, mc = false, nq;
69d0d3a3
CB		 796 int reg1, reg2;
797 unsigned long start, end;
1824c723 798 unsigned char key;
69d0d3a3
CB		 799
800 vcpu->stat.instruction_pfmf++;
801
802 kvm_s390_get_regs_rre(vcpu, &reg1, &reg2);
803
03c02807 804 if (!test_kvm_facility(vcpu->kvm, 8))
69d0d3a3
CB		 805 return kvm_s390_inject_program_int(vcpu, PGM_OPERATION);
806
807 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
208dd756 808 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
69d0d3a3
CB		 809
810 if (vcpu->run->s.regs.gprs[reg1] & PFMF_RESERVED)
811 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
812
edc5b055
DH		 813 /* Only provide non-quiescing support if enabled for the guest */
814 if (vcpu->run->s.regs.gprs[reg1] & PFMF_NQ &&
815 !test_kvm_facility(vcpu->kvm, 14))
69d0d3a3
CB		 816 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
817
1824c723
DH		 818 /* Only provide conditional-SSKE support if enabled for the guest */
819 if (vcpu->run->s.regs.gprs[reg1] & PFMF_SK &&
820 test_kvm_facility(vcpu->kvm, 10)) {
821 mr = vcpu->run->s.regs.gprs[reg1] & PFMF_MR;
822 mc = vcpu->run->s.regs.gprs[reg1] & PFMF_MC;
823 }
824
825 nq = vcpu->run->s.regs.gprs[reg1] & PFMF_NQ;
826 key = vcpu->run->s.regs.gprs[reg1] & PFMF_KEY;
69d0d3a3 827 start = vcpu->run->s.regs.gprs[reg2] & PAGE_MASK;
a02689fe 828 start = kvm_s390_logical_to_effective(vcpu, start);
fb34c603 829
6164a2e9
DH		 830 if (vcpu->run->s.regs.gprs[reg1] & PFMF_CF) {
831 if (kvm_s390_check_low_addr_prot_real(vcpu, start))
832 return kvm_s390_inject_prog_irq(vcpu, &vcpu->arch.pgm);
833 }
834
69d0d3a3
CB		 835 switch (vcpu->run->s.regs.gprs[reg1] & PFMF_FSC) {
836 case 0x00000000:
6164a2e9
DH		 837 /* only 4k frames specify a real address */
838 start = kvm_s390_real_to_abs(vcpu, start);
69d0d3a3
CB		 839 end = (start + (1UL << 12)) & ~((1UL << 12) - 1);
840 break;
841 case 0x00001000:
842 end = (start + (1UL << 20)) & ~((1UL << 20) - 1);
843 break;
69d0d3a3 844 case 0x00002000:
53df84f8
GH		 845 /* only support 2G frame size if EDAT2 is available and we are
846 not in 24-bit addressing mode */
847 if (!test_kvm_facility(vcpu->kvm, 78) ||
848 psw_bits(vcpu->arch.sie_block->gpsw).eaba == PSW_AMODE_24BIT)
849 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
69d0d3a3 850 end = (start + (1UL << 31)) & ~((1UL << 31) - 1);
53df84f8 851 break;
69d0d3a3
CB		 852 default:
853 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
854 }
a02689fe 855
695be0e7 856 while (start != end) {
6164a2e9 857 unsigned long useraddr;
fb34c603
TH		 858
859 /* Translate guest address to host address */
6164a2e9 860 useraddr = gfn_to_hva(vcpu->kvm, gpa_to_gfn(start));
fb34c603 861 if (kvm_is_error_hva(useraddr))
69d0d3a3
CB		 862 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
863
864 if (vcpu->run->s.regs.gprs[reg1] & PFMF_CF) {
865 if (clear_user((void __user *)useraddr, PAGE_SIZE))
866 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
867 }
868
869 if (vcpu->run->s.regs.gprs[reg1] & PFMF_SK) {
3ac8e380
DD		 870 int rc = __skey_check_enable(vcpu);
871
872 if (rc)
873 return rc;
d3ed1cee 874 down_read(&current->mm->mmap_sem);
1824c723
DH		 875 rc = cond_set_guest_storage_key(current->mm, useraddr,
876 key, NULL, nq, mr, mc);
d3ed1cee 877 up_read(&current->mm->mmap_sem);
1824c723 878 if (rc < 0)
69d0d3a3
CB		 879 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
880 }
881
882 start += PAGE_SIZE;
883 }
2c26d1d2
DH		 884 if (vcpu->run->s.regs.gprs[reg1] & PFMF_FSC) {
885 if (psw_bits(vcpu->arch.sie_block->gpsw).eaba == PSW_AMODE_64BIT) {
886 vcpu->run->s.regs.gprs[reg2] = end;
887 } else {
888 vcpu->run->s.regs.gprs[reg2] &= ~0xffffffffUL;
889 end = kvm_s390_logical_to_effective(vcpu, end);
890 vcpu->run->s.regs.gprs[reg2] |= end;
891 }
892 }
69d0d3a3
CB		 893 return 0;
894}
895
b31288fa
KW		 896static int handle_essa(struct kvm_vcpu *vcpu)
897{
898 /* entries expected to be 1FF */
899 int entries = (vcpu->arch.sie_block->cbrlo & ~PAGE_MASK) >> 3;
4a5e7e38 900 unsigned long *cbrlo;
b31288fa
KW		 901 struct gmap *gmap;
902 int i;
903
7cbde76b 904 VCPU_EVENT(vcpu, 4, "ESSA: release %d pages", entries);
b31288fa
KW		 905 gmap = vcpu->arch.gmap;
906 vcpu->stat.instruction_essa++;
e6db1d61 907 if (!vcpu->kvm->arch.use_cmma)
b31288fa
KW		 908 return kvm_s390_inject_program_int(vcpu, PGM_OPERATION);
909
910 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
911 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
912
913 if (((vcpu->arch.sie_block->ipb & 0xf0000000) >> 28) > 6)
914 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
915
0e8bc06a
DH		 916 /* Retry the ESSA instruction */
917 kvm_s390_retry_instr(vcpu);
b31288fa
KW		 918 vcpu->arch.sie_block->cbrlo &= PAGE_MASK; /* reset nceo */
919 cbrlo = phys_to_virt(vcpu->arch.sie_block->cbrlo);
920 down_read(&gmap->mm->mmap_sem);
4a5e7e38
DH		 921 for (i = 0; i < entries; ++i)
922 __gmap_zap(gmap, cbrlo[i]);
b31288fa 923 up_read(&gmap->mm->mmap_sem);
b31288fa
KW		 924 return 0;
925}
926
48a3e950 927static const intercept_handler_t b9_handlers[256] = {
8a242234 928 [0x8a] = handle_ipte_interlock,
48a3e950 929 [0x8d] = handle_epsw,
8a242234
HC		 930 [0x8e] = handle_ipte_interlock,
931 [0x8f] = handle_ipte_interlock,
b31288fa 932 [0xab] = handle_essa,
69d0d3a3 933 [0xaf] = handle_pfmf,
48a3e950
CH		 934};
935
936int kvm_s390_handle_b9(struct kvm_vcpu *vcpu)
937{
938 intercept_handler_t handler;
939
940 /* This is handled just as for the B2 instructions. */
941 handler = b9_handlers[vcpu->arch.sie_block->ipa & 0x00ff];
5087dfa6
TH		 942 if (handler)
943 return handler(vcpu);
944
48a3e950
CH		 945 return -EOPNOTSUPP;
946}
947
953ed88d
TH		 948int kvm_s390_handle_lctl(struct kvm_vcpu *vcpu)
949{
950 int reg1 = (vcpu->arch.sie_block->ipa & 0x00f0) >> 4;
951 int reg3 = vcpu->arch.sie_block->ipa & 0x000f;
fc56eb66
HC		 952 int reg, rc, nr_regs;
953 u32 ctl_array[16];
f987a3ee 954 u64 ga;
8ae04b8f 955 ar_t ar;
953ed88d
TH		 956
957 vcpu->stat.instruction_lctl++;
958
959 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
960 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
961
8ae04b8f 962 ga = kvm_s390_get_base_disp_rs(vcpu, &ar);
953ed88d 963
f987a3ee 964 if (ga & 3)
953ed88d
TH		 965 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
966
7cbde76b 967 VCPU_EVENT(vcpu, 4, "LCTL: r1:%d, r3:%d, addr: 0x%llx", reg1, reg3, ga);
f987a3ee 968 trace_kvm_s390_handle_lctl(vcpu, 0, reg1, reg3, ga);
953ed88d 969
fc56eb66 970 nr_regs = ((reg3 - reg1) & 0xf) + 1;
8ae04b8f 971 rc = read_guest(vcpu, ga, ar, ctl_array, nr_regs * sizeof(u32));
fc56eb66
HC		 972 if (rc)
973 return kvm_s390_inject_prog_cond(vcpu, rc);
953ed88d 974 reg = reg1;
fc56eb66 975 nr_regs = 0;
953ed88d 976 do {
953ed88d 977 vcpu->arch.sie_block->gcr[reg] &= 0xffffffff00000000ul;
fc56eb66 978 vcpu->arch.sie_block->gcr[reg] |= ctl_array[nr_regs++];
953ed88d
TH		 979 if (reg == reg3)
980 break;
981 reg = (reg + 1) % 16;
982 } while (1);
2dca485f 983 kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
953ed88d
TH		 984 return 0;
985}
986
aba07508
DH		 987int kvm_s390_handle_stctl(struct kvm_vcpu *vcpu)
988{
989 int reg1 = (vcpu->arch.sie_block->ipa & 0x00f0) >> 4;
990 int reg3 = vcpu->arch.sie_block->ipa & 0x000f;
fc56eb66
HC		 991 int reg, rc, nr_regs;
992 u32 ctl_array[16];
aba07508 993 u64 ga;
8ae04b8f 994 ar_t ar;
aba07508
DH		 995
996 vcpu->stat.instruction_stctl++;
997
998 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
999 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
1000
8ae04b8f 1001 ga = kvm_s390_get_base_disp_rs(vcpu, &ar);
aba07508
DH		 1002
1003 if (ga & 3)
1004 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
1005
7cbde76b 1006 VCPU_EVENT(vcpu, 4, "STCTL r1:%d, r3:%d, addr: 0x%llx", reg1, reg3, ga);
aba07508
DH		 1007 trace_kvm_s390_handle_stctl(vcpu, 0, reg1, reg3, ga);
1008
1009 reg = reg1;
fc56eb66 1010 nr_regs = 0;
aba07508 1011 do {
fc56eb66 1012 ctl_array[nr_regs++] = vcpu->arch.sie_block->gcr[reg];
aba07508
DH		 1013 if (reg == reg3)
1014 break;
1015 reg = (reg + 1) % 16;
1016 } while (1);
8ae04b8f 1017 rc = write_guest(vcpu, ga, ar, ctl_array, nr_regs * sizeof(u32));
fc56eb66 1018 return rc ? kvm_s390_inject_prog_cond(vcpu, rc) : 0;
aba07508
DH		 1019}
1020
953ed88d
TH		 1021static int handle_lctlg(struct kvm_vcpu *vcpu)
1022{
1023 int reg1 = (vcpu->arch.sie_block->ipa & 0x00f0) >> 4;
1024 int reg3 = vcpu->arch.sie_block->ipa & 0x000f;
fc56eb66
HC		 1025 int reg, rc, nr_regs;
1026 u64 ctl_array[16];
1027 u64 ga;
8ae04b8f 1028 ar_t ar;
953ed88d
TH		 1029
1030 vcpu->stat.instruction_lctlg++;
1031
1032 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
1033 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
1034
8ae04b8f 1035 ga = kvm_s390_get_base_disp_rsy(vcpu, &ar);
953ed88d 1036
f987a3ee 1037 if (ga & 7)
953ed88d
TH		 1038 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
1039
7cbde76b 1040 VCPU_EVENT(vcpu, 4, "LCTLG: r1:%d, r3:%d, addr: 0x%llx", reg1, reg3, ga);
f987a3ee 1041 trace_kvm_s390_handle_lctl(vcpu, 1, reg1, reg3, ga);
953ed88d 1042
fc56eb66 1043 nr_regs = ((reg3 - reg1) & 0xf) + 1;
8ae04b8f 1044 rc = read_guest(vcpu, ga, ar, ctl_array, nr_regs * sizeof(u64));
fc56eb66
HC		 1045 if (rc)
1046 return kvm_s390_inject_prog_cond(vcpu, rc);
1047 reg = reg1;
1048 nr_regs = 0;
953ed88d 1049 do {
fc56eb66 1050 vcpu->arch.sie_block->gcr[reg] = ctl_array[nr_regs++];
953ed88d
TH		 1051 if (reg == reg3)
1052 break;
1053 reg = (reg + 1) % 16;
1054 } while (1);
2dca485f 1055 kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
953ed88d
TH		 1056 return 0;
1057}
1058
aba07508
DH		 1059static int handle_stctg(struct kvm_vcpu *vcpu)
1060{
1061 int reg1 = (vcpu->arch.sie_block->ipa & 0x00f0) >> 4;
1062 int reg3 = vcpu->arch.sie_block->ipa & 0x000f;
fc56eb66
HC		 1063 int reg, rc, nr_regs;
1064 u64 ctl_array[16];
1065 u64 ga;
8ae04b8f 1066 ar_t ar;
aba07508
DH		 1067
1068 vcpu->stat.instruction_stctg++;
1069
1070 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
1071 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
1072
8ae04b8f 1073 ga = kvm_s390_get_base_disp_rsy(vcpu, &ar);
aba07508
DH		 1074
1075 if (ga & 7)
1076 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
1077
7cbde76b 1078 VCPU_EVENT(vcpu, 4, "STCTG r1:%d, r3:%d, addr: 0x%llx", reg1, reg3, ga);
aba07508
DH		 1079 trace_kvm_s390_handle_stctl(vcpu, 1, reg1, reg3, ga);
1080
fc56eb66
HC		 1081 reg = reg1;
1082 nr_regs = 0;
aba07508 1083 do {
fc56eb66 1084 ctl_array[nr_regs++] = vcpu->arch.sie_block->gcr[reg];
aba07508
DH		 1085 if (reg == reg3)
1086 break;
1087 reg = (reg + 1) % 16;
1088 } while (1);
8ae04b8f 1089 rc = write_guest(vcpu, ga, ar, ctl_array, nr_regs * sizeof(u64));
fc56eb66 1090 return rc ? kvm_s390_inject_prog_cond(vcpu, rc) : 0;
aba07508
DH		 1091}
1092
f379aae5 1093static const intercept_handler_t eb_handlers[256] = {
953ed88d 1094 [0x2f] = handle_lctlg,
aba07508 1095 [0x25] = handle_stctg,
f379aae5
CH		 1096};
1097
953ed88d 1098int kvm_s390_handle_eb(struct kvm_vcpu *vcpu)
f379aae5
CH		 1099{
1100 intercept_handler_t handler;
1101
f379aae5
CH		 1102 handler = eb_handlers[vcpu->arch.sie_block->ipb & 0xff];
1103 if (handler)
1104 return handler(vcpu);
1105 return -EOPNOTSUPP;
1106}
1107
bb25b9ba
CB		 1108static int handle_tprot(struct kvm_vcpu *vcpu)
1109{
b1c571a5 1110 u64 address1, address2;
a0465f9a
TH		 1111 unsigned long hva, gpa;
1112 int ret = 0, cc = 0;
1113 bool writable;
8ae04b8f 1114 ar_t ar;
bb25b9ba
CB		 1115
1116 vcpu->stat.instruction_tprot++;
1117
f9f6bbc6
TH		 1118 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
1119 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
1120
8ae04b8f 1121 kvm_s390_get_base_disp_sse(vcpu, &address1, &address2, &ar, NULL);
b1c571a5 1122
bb25b9ba
CB		 1123 /* we only handle the Linux memory detection case:
1124 * access key == 0
bb25b9ba
CB		 1125 * everything else goes to userspace. */
1126 if (address2 & 0xf0)
1127 return -EOPNOTSUPP;
1128 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_DAT)
a0465f9a 1129 ipte_lock(vcpu);
92c96321 1130 ret = guest_translate_address(vcpu, address1, ar, &gpa, GACC_STORE);
a0465f9a
TH		 1131 if (ret == PGM_PROTECTION) {
1132 /* Write protected? Try again with read-only... */
1133 cc = 1;
92c96321
DH		 1134 ret = guest_translate_address(vcpu, address1, ar, &gpa,
1135 GACC_FETCH);
a0465f9a
TH		 1136 }
1137 if (ret) {
1138 if (ret == PGM_ADDRESSING || ret == PGM_TRANSLATION_SPEC) {
1139 ret = kvm_s390_inject_program_int(vcpu, ret);
1140 } else if (ret > 0) {
1141 /* Translation not available */
1142 kvm_s390_set_psw_cc(vcpu, 3);
1143 ret = 0;
1144 }
1145 goto out_unlock;
1146 }
59a1fa2d 1147
a0465f9a
TH		 1148 hva = gfn_to_hva_prot(vcpu->kvm, gpa_to_gfn(gpa), &writable);
1149 if (kvm_is_error_hva(hva)) {
1150 ret = kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
1151 } else {
1152 if (!writable)
1153 cc = 1; /* Write not permitted ==> read-only */
1154 kvm_s390_set_psw_cc(vcpu, cc);
1155 /* Note: CC2 only occurs for storage keys (not supported yet) */
1156 }
1157out_unlock:
1158 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_DAT)
1159 ipte_unlock(vcpu);
1160 return ret;
bb25b9ba
CB		 1161}
1162
1163int kvm_s390_handle_e5(struct kvm_vcpu *vcpu)
1164{
1165 /* For e5xx... instructions we only handle TPROT */
1166 if ((vcpu->arch.sie_block->ipa & 0x00ff) == 0x01)
1167 return handle_tprot(vcpu);
1168 return -EOPNOTSUPP;
1169}
1170
8c3f61e2
CH		 1171static int handle_sckpf(struct kvm_vcpu *vcpu)
1172{
1173 u32 value;
1174
1175 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
208dd756 1176 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
8c3f61e2
CH		 1177
1178 if (vcpu->run->s.regs.gprs[0] & 0x00000000ffff0000)
1179 return kvm_s390_inject_program_int(vcpu,
1180 PGM_SPECIFICATION);
1181
1182 value = vcpu->run->s.regs.gprs[0] & 0x000000000000ffff;
1183 vcpu->arch.sie_block->todpr = value;
1184
1185 return 0;
1186}
1187
9acc317b
DH		 1188static int handle_ptff(struct kvm_vcpu *vcpu)
1189{
1190 /* we don't emulate any control instructions yet */
1191 kvm_s390_set_psw_cc(vcpu, 3);
1192 return 0;
1193}
1194
77975357 1195static const intercept_handler_t x01_handlers[256] = {
9acc317b 1196 [0x04] = handle_ptff,
8c3f61e2
CH		 1197 [0x07] = handle_sckpf,
1198};
1199
1200int kvm_s390_handle_01(struct kvm_vcpu *vcpu)
1201{
1202 intercept_handler_t handler;
1203
1204 handler = x01_handlers[vcpu->arch.sie_block->ipa & 0x00ff];
1205 if (handler)
1206 return handler(vcpu);
1207 return -EOPNOTSUPP;
1208}
Linux 6.x block layer and io_uring tree(s)