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Merge remote-tracking branch 'asoc/topic/ac97' into asoc-fsl
[deliverable/linux.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>
26#include <asm/io.h>
48a3e950
CH		 27#include <asm/ptrace.h>
28#include <asm/compat.h>
453423dc
CB		 29#include "gaccess.h"
30#include "kvm-s390.h"
5786fffa 31#include "trace.h"
453423dc
CB		 32
33static int handle_set_prefix(struct kvm_vcpu *vcpu)
34{
453423dc
CB		 35 u64 operand2;
36 u32 address = 0;
37 u8 tmp;
38
39 vcpu->stat.instruction_spx++;
40
5087dfa6
TH		 41 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
42 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
43
b1c571a5 44 operand2 = kvm_s390_get_base_disp_s(vcpu);
453423dc
CB		 45
46 /* must be word boundary */
db4a29cb
HC		 47 if (operand2 & 3)
48 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
453423dc
CB		 49
50 /* get the value */
db4a29cb
HC		 51 if (get_guest(vcpu, address, (u32 __user *) operand2))
52 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
453423dc
CB		 53
54 address = address & 0x7fffe000u;
55
56 /* make sure that the new value is valid memory */
57 if (copy_from_guest_absolute(vcpu, &tmp, address, 1) ||
db4a29cb
HC		 58 (copy_from_guest_absolute(vcpu, &tmp, address + PAGE_SIZE, 1)))
59 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
453423dc 60
8d26cf7b 61 kvm_s390_set_prefix(vcpu, address);
453423dc
CB		 62
63 VCPU_EVENT(vcpu, 5, "setting prefix to %x", address);
5786fffa 64 trace_kvm_s390_handle_prefix(vcpu, 1, address);
453423dc
CB		 65 return 0;
66}
67
68static int handle_store_prefix(struct kvm_vcpu *vcpu)
69{
453423dc
CB		 70 u64 operand2;
71 u32 address;
72
73 vcpu->stat.instruction_stpx++;
b1c571a5 74
5087dfa6
TH		 75 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
76 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
77
b1c571a5 78 operand2 = kvm_s390_get_base_disp_s(vcpu);
453423dc
CB		 79
80 /* must be word boundary */
db4a29cb
HC		 81 if (operand2 & 3)
82 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
453423dc
CB		 83
84 address = vcpu->arch.sie_block->prefix;
85 address = address & 0x7fffe000u;
86
87 /* get the value */
db4a29cb
HC		 88 if (put_guest(vcpu, address, (u32 __user *)operand2))
89 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
453423dc
CB		 90
91 VCPU_EVENT(vcpu, 5, "storing prefix to %x", address);
5786fffa 92 trace_kvm_s390_handle_prefix(vcpu, 0, address);
453423dc
CB		 93 return 0;
94}
95
96static int handle_store_cpu_address(struct kvm_vcpu *vcpu)
97{
453423dc 98 u64 useraddr;
453423dc
CB		 99
100 vcpu->stat.instruction_stap++;
b1c571a5 101
5087dfa6
TH		 102 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
103 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
104
b1c571a5 105 useraddr = kvm_s390_get_base_disp_s(vcpu);
453423dc 106
db4a29cb
HC		 107 if (useraddr & 1)
108 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
453423dc 109
db4a29cb
HC		 110 if (put_guest(vcpu, vcpu->vcpu_id, (u16 __user *)useraddr))
111 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
453423dc 112
33e19115 113 VCPU_EVENT(vcpu, 5, "storing cpu address to %llx", useraddr);
5786fffa 114 trace_kvm_s390_handle_stap(vcpu, useraddr);
453423dc
CB		 115 return 0;
116}
117
118static int handle_skey(struct kvm_vcpu *vcpu)
119{
120 vcpu->stat.instruction_storage_key++;
5087dfa6
TH		 121
122 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
123 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
124
dfcf7dc6
MS		 125 vcpu->arch.sie_block->gpsw.addr =
126 __rewind_psw(vcpu->arch.sie_block->gpsw, 4);
453423dc
CB		 127 VCPU_EVENT(vcpu, 4, "%s", "retrying storage key operation");
128 return 0;
129}
130
fa6b7fe9 131static int handle_tpi(struct kvm_vcpu *vcpu)
453423dc 132{
fa6b7fe9 133 struct kvm_s390_interrupt_info *inti;
7c959e82 134 u64 addr;
fa6b7fe9
CH		 135 int cc;
136
137 addr = kvm_s390_get_base_disp_s(vcpu);
db4a29cb
HC		 138 if (addr & 3)
139 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
7c959e82 140 cc = 0;
fa6b7fe9 141 inti = kvm_s390_get_io_int(vcpu->kvm, vcpu->run->s.regs.crs[6], 0);
7c959e82
HC		 142 if (!inti)
143 goto no_interrupt;
144 cc = 1;
145 if (addr) {
146 /*
147 * Store the two-word I/O interruption code into the
148 * provided area.
149 */
133608f3
TH		 150 if (put_guest(vcpu, inti->io.subchannel_id, (u16 __user *)addr)
151 || put_guest(vcpu, inti->io.subchannel_nr, (u16 __user *)(addr + 2))
152 || put_guest(vcpu, inti->io.io_int_parm, (u32 __user *)(addr + 4)))
153 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
7c959e82
HC		 154 } else {
155 /*
156 * Store the three-word I/O interruption code into
157 * the appropriate lowcore area.
158 */
0a75ca27
HC		 159 put_guest(vcpu, inti->io.subchannel_id, (u16 __user *) __LC_SUBCHANNEL_ID);
160 put_guest(vcpu, inti->io.subchannel_nr, (u16 __user *) __LC_SUBCHANNEL_NR);
161 put_guest(vcpu, inti->io.io_int_parm, (u32 __user *) __LC_IO_INT_PARM);
162 put_guest(vcpu, inti->io.io_int_word, (u32 __user *) __LC_IO_INT_WORD);
7c959e82 163 }
fa6b7fe9 164 kfree(inti);
7c959e82 165no_interrupt:
fa6b7fe9 166 /* Set condition code and we're done. */
453423dc 167 vcpu->arch.sie_block->gpsw.mask &= ~(3ul << 44);
fa6b7fe9 168 vcpu->arch.sie_block->gpsw.mask |= (cc & 3ul) << 44;
453423dc
CB		 169 return 0;
170}
171
fa6b7fe9
CH		 172static int handle_tsch(struct kvm_vcpu *vcpu)
173{
174 struct kvm_s390_interrupt_info *inti;
175
176 inti = kvm_s390_get_io_int(vcpu->kvm, 0,
177 vcpu->run->s.regs.gprs[1]);
178
179 /*
180 * Prepare exit to userspace.
181 * We indicate whether we dequeued a pending I/O interrupt
182 * so that userspace can re-inject it if the instruction gets
183 * a program check. While this may re-order the pending I/O
184 * interrupts, this is no problem since the priority is kept
185 * intact.
186 */
187 vcpu->run->exit_reason = KVM_EXIT_S390_TSCH;
188 vcpu->run->s390_tsch.dequeued = !!inti;
189 if (inti) {
190 vcpu->run->s390_tsch.subchannel_id = inti->io.subchannel_id;
191 vcpu->run->s390_tsch.subchannel_nr = inti->io.subchannel_nr;
192 vcpu->run->s390_tsch.io_int_parm = inti->io.io_int_parm;
193 vcpu->run->s390_tsch.io_int_word = inti->io.io_int_word;
194 }
195 vcpu->run->s390_tsch.ipb = vcpu->arch.sie_block->ipb;
196 kfree(inti);
197 return -EREMOTE;
198}
199
200static int handle_io_inst(struct kvm_vcpu *vcpu)
201{
202 VCPU_EVENT(vcpu, 4, "%s", "I/O instruction");
203
5087dfa6
TH		 204 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
205 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
206
fa6b7fe9
CH		 207 if (vcpu->kvm->arch.css_support) {
208 /*
209 * Most I/O instructions will be handled by userspace.
210 * Exceptions are tpi and the interrupt portion of tsch.
211 */
212 if (vcpu->arch.sie_block->ipa == 0xb236)
213 return handle_tpi(vcpu);
214 if (vcpu->arch.sie_block->ipa == 0xb235)
215 return handle_tsch(vcpu);
216 /* Handle in userspace. */
217 return -EOPNOTSUPP;
218 } else {
219 /*
220 * Set condition code 3 to stop the guest from issueing channel
221 * I/O instructions.
222 */
223 vcpu->arch.sie_block->gpsw.mask &= ~(3ul << 44);
224 vcpu->arch.sie_block->gpsw.mask |= (3 & 3ul) << 44;
225 return 0;
226 }
227}
228
453423dc
CB		 229static int handle_stfl(struct kvm_vcpu *vcpu)
230{
14375bc4 231 unsigned int facility_list;
453423dc
CB		 232 int rc;
233
234 vcpu->stat.instruction_stfl++;
5087dfa6
TH		 235
236 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
237 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
238
a0046b6d 239 /* only pass the facility bits, which we can handle */
69d0d3a3 240 facility_list = S390_lowcore.stfl_fac_list & 0xff82fff3;
453423dc
CB		 241
242 rc = copy_to_guest(vcpu, offsetof(struct _lowcore, stfl_fac_list),
243 &facility_list, sizeof(facility_list));
dc5008b9 244 if (rc)
db4a29cb
HC		 245 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
246 VCPU_EVENT(vcpu, 5, "store facility list value %x", facility_list);
247 trace_kvm_s390_handle_stfl(vcpu, facility_list);
453423dc
CB		 248 return 0;
249}
250
48a3e950
CH		 251static void handle_new_psw(struct kvm_vcpu *vcpu)
252{
253 /* Check whether the new psw is enabled for machine checks. */
254 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_MCHECK)
255 kvm_s390_deliver_pending_machine_checks(vcpu);
256}
257
258#define PSW_MASK_ADDR_MODE (PSW_MASK_EA | PSW_MASK_BA)
259#define PSW_MASK_UNASSIGNED 0xb80800fe7fffffffUL
d21683ea 260#define PSW_ADDR_24 0x0000000000ffffffUL
48a3e950
CH		 261#define PSW_ADDR_31 0x000000007fffffffUL
262
3736b874
HC		 263static int is_valid_psw(psw_t *psw) {
264 if (psw->mask & PSW_MASK_UNASSIGNED)
265 return 0;
266 if ((psw->mask & PSW_MASK_ADDR_MODE) == PSW_MASK_BA) {
267 if (psw->addr & ~PSW_ADDR_31)
268 return 0;
269 }
270 if (!(psw->mask & PSW_MASK_ADDR_MODE) && (psw->addr & ~PSW_ADDR_24))
271 return 0;
272 if ((psw->mask & PSW_MASK_ADDR_MODE) == PSW_MASK_EA)
273 return 0;
274 return 1;
275}
276
48a3e950
CH		 277int kvm_s390_handle_lpsw(struct kvm_vcpu *vcpu)
278{
3736b874 279 psw_t *gpsw = &vcpu->arch.sie_block->gpsw;
48a3e950 280 psw_compat_t new_psw;
3736b874 281 u64 addr;
48a3e950 282
3736b874 283 if (gpsw->mask & PSW_MASK_PSTATE)
208dd756
TH		 284 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
285
48a3e950 286 addr = kvm_s390_get_base_disp_s(vcpu);
6fd0fcc9
HC		 287 if (addr & 7)
288 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
6fd0fcc9
HC		 289 if (copy_from_guest(vcpu, &new_psw, addr, sizeof(new_psw)))
290 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
6fd0fcc9
HC		 291 if (!(new_psw.mask & PSW32_MASK_BASE))
292 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
3736b874
HC		 293 gpsw->mask = (new_psw.mask & ~PSW32_MASK_BASE) << 32;
294 gpsw->mask |= new_psw.addr & PSW32_ADDR_AMODE;
295 gpsw->addr = new_psw.addr & ~PSW32_ADDR_AMODE;
296 if (!is_valid_psw(gpsw))
6fd0fcc9 297 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
48a3e950 298 handle_new_psw(vcpu);
48a3e950
CH		 299 return 0;
300}
301
302static int handle_lpswe(struct kvm_vcpu *vcpu)
303{
48a3e950 304 psw_t new_psw;
3736b874 305 u64 addr;
48a3e950 306
5087dfa6
TH		 307 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
308 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
309
48a3e950 310 addr = kvm_s390_get_base_disp_s(vcpu);
6fd0fcc9
HC		 311 if (addr & 7)
312 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
6fd0fcc9
HC		 313 if (copy_from_guest(vcpu, &new_psw, addr, sizeof(new_psw)))
314 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
3736b874
HC		 315 vcpu->arch.sie_block->gpsw = new_psw;
316 if (!is_valid_psw(&vcpu->arch.sie_block->gpsw))
6fd0fcc9 317 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
48a3e950 318 handle_new_psw(vcpu);
48a3e950
CH		 319 return 0;
320}
321
453423dc
CB		 322static int handle_stidp(struct kvm_vcpu *vcpu)
323{
453423dc 324 u64 operand2;
453423dc
CB		 325
326 vcpu->stat.instruction_stidp++;
b1c571a5 327
5087dfa6
TH		 328 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
329 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
330
b1c571a5 331 operand2 = kvm_s390_get_base_disp_s(vcpu);
453423dc 332
db4a29cb
HC		 333 if (operand2 & 7)
334 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
453423dc 335
db4a29cb
HC		 336 if (put_guest(vcpu, vcpu->arch.stidp_data, (u64 __user *)operand2))
337 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
453423dc
CB		 338
339 VCPU_EVENT(vcpu, 5, "%s", "store cpu id");
453423dc
CB		 340 return 0;
341}
342
343static void handle_stsi_3_2_2(struct kvm_vcpu *vcpu, struct sysinfo_3_2_2 *mem)
344{
180c12fb 345 struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
453423dc
CB		 346 int cpus = 0;
347 int n;
348
b037a4f3 349 spin_lock(&fi->lock);
453423dc
CB		 350 for (n = 0; n < KVM_MAX_VCPUS; n++)
351 if (fi->local_int[n])
352 cpus++;
b037a4f3 353 spin_unlock(&fi->lock);
453423dc
CB		 354
355 /* deal with other level 3 hypervisors */
caf757c6 356 if (stsi(mem, 3, 2, 2))
453423dc
CB		 357 mem->count = 0;
358 if (mem->count < 8)
359 mem->count++;
360 for (n = mem->count - 1; n > 0 ; n--)
361 memcpy(&mem->vm[n], &mem->vm[n - 1], sizeof(mem->vm[0]));
362
363 mem->vm[0].cpus_total = cpus;
364 mem->vm[0].cpus_configured = cpus;
365 mem->vm[0].cpus_standby = 0;
366 mem->vm[0].cpus_reserved = 0;
367 mem->vm[0].caf = 1000;
368 memcpy(mem->vm[0].name, "KVMguest", 8);
369 ASCEBC(mem->vm[0].name, 8);
370 memcpy(mem->vm[0].cpi, "KVM/Linux ", 16);
371 ASCEBC(mem->vm[0].cpi, 16);
372}
373
374static int handle_stsi(struct kvm_vcpu *vcpu)
375{
5a32c1af
CB		 376 int fc = (vcpu->run->s.regs.gprs[0] & 0xf0000000) >> 28;
377 int sel1 = vcpu->run->s.regs.gprs[0] & 0xff;
378 int sel2 = vcpu->run->s.regs.gprs[1] & 0xffff;
c51f068c 379 unsigned long mem = 0;
453423dc 380 u64 operand2;
db4a29cb 381 int rc = 0;
453423dc
CB		 382
383 vcpu->stat.instruction_stsi++;
384 VCPU_EVENT(vcpu, 4, "stsi: fc: %x sel1: %x sel2: %x", fc, sel1, sel2);
385
5087dfa6
TH		 386 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
387 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
388
87d41fb4
TH		 389 if (fc > 3) {
390 vcpu->arch.sie_block->gpsw.mask |= 3ul << 44; /* cc 3 */
391 return 0;
392 }
453423dc 393
87d41fb4
TH		 394 if (vcpu->run->s.regs.gprs[0] & 0x0fffff00
395 || vcpu->run->s.regs.gprs[1] & 0xffff0000)
453423dc
CB		 396 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
397
87d41fb4 398 if (fc == 0) {
5a32c1af 399 vcpu->run->s.regs.gprs[0] = 3 << 28;
87d41fb4 400 vcpu->arch.sie_block->gpsw.mask &= ~(3ul << 44); /* cc 0 */
453423dc 401 return 0;
87d41fb4
TH		 402 }
403
404 operand2 = kvm_s390_get_base_disp_s(vcpu);
405
406 if (operand2 & 0xfff)
407 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
408
409 switch (fc) {
453423dc
CB		 410 case 1: /* same handling for 1 and 2 */
411 case 2:
412 mem = get_zeroed_page(GFP_KERNEL);
413 if (!mem)
c51f068c 414 goto out_no_data;
caf757c6 415 if (stsi((void *) mem, fc, sel1, sel2))
c51f068c 416 goto out_no_data;
453423dc
CB		 417 break;
418 case 3:
419 if (sel1 != 2 || sel2 != 2)
c51f068c 420 goto out_no_data;
453423dc
CB		 421 mem = get_zeroed_page(GFP_KERNEL);
422 if (!mem)
c51f068c 423 goto out_no_data;
453423dc
CB		 424 handle_stsi_3_2_2(vcpu, (void *) mem);
425 break;
453423dc
CB		 426 }
427
428 if (copy_to_guest_absolute(vcpu, operand2, (void *) mem, PAGE_SIZE)) {
db4a29cb 429 rc = kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
c51f068c 430 goto out_exception;
453423dc 431 }
5786fffa 432 trace_kvm_s390_handle_stsi(vcpu, fc, sel1, sel2, operand2);
453423dc
CB		 433 free_page(mem);
434 vcpu->arch.sie_block->gpsw.mask &= ~(3ul << 44);
5a32c1af 435 vcpu->run->s.regs.gprs[0] = 0;
453423dc 436 return 0;
c51f068c 437out_no_data:
453423dc
CB		 438 /* condition code 3 */
439 vcpu->arch.sie_block->gpsw.mask |= 3ul << 44;
c51f068c
HC		 440out_exception:
441 free_page(mem);
db4a29cb 442 return rc;
453423dc
CB		 443}
444
f379aae5 445static const intercept_handler_t b2_handlers[256] = {
453423dc
CB		 446 [0x02] = handle_stidp,
447 [0x10] = handle_set_prefix,
448 [0x11] = handle_store_prefix,
449 [0x12] = handle_store_cpu_address,
450 [0x29] = handle_skey,
451 [0x2a] = handle_skey,
452 [0x2b] = handle_skey,
f379aae5
CH		 453 [0x30] = handle_io_inst,
454 [0x31] = handle_io_inst,
455 [0x32] = handle_io_inst,
456 [0x33] = handle_io_inst,
457 [0x34] = handle_io_inst,
458 [0x35] = handle_io_inst,
459 [0x36] = handle_io_inst,
460 [0x37] = handle_io_inst,
461 [0x38] = handle_io_inst,
462 [0x39] = handle_io_inst,
463 [0x3a] = handle_io_inst,
464 [0x3b] = handle_io_inst,
465 [0x3c] = handle_io_inst,
466 [0x5f] = handle_io_inst,
467 [0x74] = handle_io_inst,
468 [0x76] = handle_io_inst,
453423dc
CB		 469 [0x7d] = handle_stsi,
470 [0xb1] = handle_stfl,
48a3e950 471 [0xb2] = handle_lpswe,
453423dc
CB		 472};
473
70455a36 474int kvm_s390_handle_b2(struct kvm_vcpu *vcpu)
453423dc
CB		 475{
476 intercept_handler_t handler;
477
70455a36 478 /*
5087dfa6
TH		 479 * A lot of B2 instructions are priviledged. Here we check for
480 * the privileged ones, that we can handle in the kernel.
481 * Anything else goes to userspace.
482 */
f379aae5 483 handler = b2_handlers[vcpu->arch.sie_block->ipa & 0x00ff];
5087dfa6
TH		 484 if (handler)
485 return handler(vcpu);
486
b8e660b8 487 return -EOPNOTSUPP;
453423dc 488}
bb25b9ba 489
48a3e950
CH		 490static int handle_epsw(struct kvm_vcpu *vcpu)
491{
492 int reg1, reg2;
493
aeb87c3c 494 kvm_s390_get_regs_rre(vcpu, &reg1, &reg2);
48a3e950
CH		 495
496 /* This basically extracts the mask half of the psw. */
497 vcpu->run->s.regs.gprs[reg1] &= 0xffffffff00000000;
498 vcpu->run->s.regs.gprs[reg1] |= vcpu->arch.sie_block->gpsw.mask >> 32;
499 if (reg2) {
500 vcpu->run->s.regs.gprs[reg2] &= 0xffffffff00000000;
501 vcpu->run->s.regs.gprs[reg2] |=
502 vcpu->arch.sie_block->gpsw.mask & 0x00000000ffffffff;
503 }
504 return 0;
505}
506
69d0d3a3
CB		 507#define PFMF_RESERVED 0xfffc0101UL
508#define PFMF_SK 0x00020000UL
509#define PFMF_CF 0x00010000UL
510#define PFMF_UI 0x00008000UL
511#define PFMF_FSC 0x00007000UL
512#define PFMF_NQ 0x00000800UL
513#define PFMF_MR 0x00000400UL
514#define PFMF_MC 0x00000200UL
515#define PFMF_KEY 0x000000feUL
516
517static int handle_pfmf(struct kvm_vcpu *vcpu)
518{
519 int reg1, reg2;
520 unsigned long start, end;
521
522 vcpu->stat.instruction_pfmf++;
523
524 kvm_s390_get_regs_rre(vcpu, &reg1, &reg2);
525
526 if (!MACHINE_HAS_PFMF)
527 return kvm_s390_inject_program_int(vcpu, PGM_OPERATION);
528
529 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
208dd756 530 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
69d0d3a3
CB		 531
532 if (vcpu->run->s.regs.gprs[reg1] & PFMF_RESERVED)
533 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
534
535 /* Only provide non-quiescing support if the host supports it */
e769ece3 536 if (vcpu->run->s.regs.gprs[reg1] & PFMF_NQ && !test_facility(14))
69d0d3a3
CB		 537 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
538
539 /* No support for conditional-SSKE */
540 if (vcpu->run->s.regs.gprs[reg1] & (PFMF_MR | PFMF_MC))
541 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
542
543 start = vcpu->run->s.regs.gprs[reg2] & PAGE_MASK;
544 switch (vcpu->run->s.regs.gprs[reg1] & PFMF_FSC) {
545 case 0x00000000:
546 end = (start + (1UL << 12)) & ~((1UL << 12) - 1);
547 break;
548 case 0x00001000:
549 end = (start + (1UL << 20)) & ~((1UL << 20) - 1);
550 break;
551 /* We dont support EDAT2
552 case 0x00002000:
553 end = (start + (1UL << 31)) & ~((1UL << 31) - 1);
554 break;*/
555 default:
556 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
557 }
558 while (start < end) {
559 unsigned long useraddr;
560
561 useraddr = gmap_translate(start, vcpu->arch.gmap);
562 if (IS_ERR((void *)useraddr))
563 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
564
565 if (vcpu->run->s.regs.gprs[reg1] & PFMF_CF) {
566 if (clear_user((void __user *)useraddr, PAGE_SIZE))
567 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
568 }
569
570 if (vcpu->run->s.regs.gprs[reg1] & PFMF_SK) {
571 if (set_guest_storage_key(current->mm, useraddr,
572 vcpu->run->s.regs.gprs[reg1] & PFMF_KEY,
573 vcpu->run->s.regs.gprs[reg1] & PFMF_NQ))
574 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
575 }
576
577 start += PAGE_SIZE;
578 }
579 if (vcpu->run->s.regs.gprs[reg1] & PFMF_FSC)
580 vcpu->run->s.regs.gprs[reg2] = end;
581 return 0;
582}
583
48a3e950
CH		 584static const intercept_handler_t b9_handlers[256] = {
585 [0x8d] = handle_epsw,
f379aae5 586 [0x9c] = handle_io_inst,
69d0d3a3 587 [0xaf] = handle_pfmf,
48a3e950
CH		 588};
589
590int kvm_s390_handle_b9(struct kvm_vcpu *vcpu)
591{
592 intercept_handler_t handler;
593
594 /* This is handled just as for the B2 instructions. */
595 handler = b9_handlers[vcpu->arch.sie_block->ipa & 0x00ff];
5087dfa6
TH		 596 if (handler)
597 return handler(vcpu);
598
48a3e950
CH		 599 return -EOPNOTSUPP;
600}
601
953ed88d
TH		 602int kvm_s390_handle_lctl(struct kvm_vcpu *vcpu)
603{
604 int reg1 = (vcpu->arch.sie_block->ipa & 0x00f0) >> 4;
605 int reg3 = vcpu->arch.sie_block->ipa & 0x000f;
606 u64 useraddr;
607 u32 val = 0;
608 int reg, rc;
609
610 vcpu->stat.instruction_lctl++;
611
612 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
613 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
614
615 useraddr = kvm_s390_get_base_disp_rs(vcpu);
616
617 if (useraddr & 3)
618 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
619
620 VCPU_EVENT(vcpu, 5, "lctl r1:%x, r3:%x, addr:%llx", reg1, reg3,
621 useraddr);
622 trace_kvm_s390_handle_lctl(vcpu, 0, reg1, reg3, useraddr);
623
624 reg = reg1;
625 do {
626 rc = get_guest(vcpu, val, (u32 __user *) useraddr);
627 if (rc)
628 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
629 vcpu->arch.sie_block->gcr[reg] &= 0xffffffff00000000ul;
630 vcpu->arch.sie_block->gcr[reg] |= val;
631 useraddr += 4;
632 if (reg == reg3)
633 break;
634 reg = (reg + 1) % 16;
635 } while (1);
636
637 return 0;
638}
639
640static int handle_lctlg(struct kvm_vcpu *vcpu)
641{
642 int reg1 = (vcpu->arch.sie_block->ipa & 0x00f0) >> 4;
643 int reg3 = vcpu->arch.sie_block->ipa & 0x000f;
644 u64 useraddr;
645 int reg, rc;
646
647 vcpu->stat.instruction_lctlg++;
648
649 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
650 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
651
652 useraddr = kvm_s390_get_base_disp_rsy(vcpu);
653
654 if (useraddr & 7)
655 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
656
657 reg = reg1;
658
659 VCPU_EVENT(vcpu, 5, "lctlg r1:%x, r3:%x, addr:%llx", reg1, reg3,
660 useraddr);
661 trace_kvm_s390_handle_lctl(vcpu, 1, reg1, reg3, useraddr);
662
663 do {
664 rc = get_guest(vcpu, vcpu->arch.sie_block->gcr[reg],
665 (u64 __user *) useraddr);
666 if (rc)
667 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
668 useraddr += 8;
669 if (reg == reg3)
670 break;
671 reg = (reg + 1) % 16;
672 } while (1);
673
674 return 0;
675}
676
f379aae5 677static const intercept_handler_t eb_handlers[256] = {
953ed88d 678 [0x2f] = handle_lctlg,
f379aae5
CH		 679 [0x8a] = handle_io_inst,
680};
681
953ed88d 682int kvm_s390_handle_eb(struct kvm_vcpu *vcpu)
f379aae5
CH		 683{
684 intercept_handler_t handler;
685
f379aae5
CH		 686 handler = eb_handlers[vcpu->arch.sie_block->ipb & 0xff];
687 if (handler)
688 return handler(vcpu);
689 return -EOPNOTSUPP;
690}
691
bb25b9ba
CB		 692static int handle_tprot(struct kvm_vcpu *vcpu)
693{
b1c571a5 694 u64 address1, address2;
bb25b9ba 695 struct vm_area_struct *vma;
1eddb85f 696 unsigned long user_address;
bb25b9ba
CB		 697
698 vcpu->stat.instruction_tprot++;
699
f9f6bbc6
TH		 700 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
701 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
702
b1c571a5
CH		 703 kvm_s390_get_base_disp_sse(vcpu, &address1, &address2);
704
bb25b9ba
CB		 705 /* we only handle the Linux memory detection case:
706 * access key == 0
707 * guest DAT == off
708 * everything else goes to userspace. */
709 if (address2 & 0xf0)
710 return -EOPNOTSUPP;
711 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_DAT)
712 return -EOPNOTSUPP;
713
bb25b9ba 714 down_read(&current->mm->mmap_sem);
59a1fa2d
HC		 715 user_address = __gmap_translate(address1, vcpu->arch.gmap);
716 if (IS_ERR_VALUE(user_address))
717 goto out_inject;
1eddb85f 718 vma = find_vma(current->mm, user_address);
59a1fa2d
HC		 719 if (!vma)
720 goto out_inject;
bb25b9ba
CB		 721 vcpu->arch.sie_block->gpsw.mask &= ~(3ul << 44);
722 if (!(vma->vm_flags & VM_WRITE) && (vma->vm_flags & VM_READ))
723 vcpu->arch.sie_block->gpsw.mask |= (1ul << 44);
724 if (!(vma->vm_flags & VM_WRITE) && !(vma->vm_flags & VM_READ))
725 vcpu->arch.sie_block->gpsw.mask |= (2ul << 44);
726
727 up_read(&current->mm->mmap_sem);
728 return 0;
59a1fa2d
HC		 729
730out_inject:
731 up_read(&current->mm->mmap_sem);
732 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
bb25b9ba
CB		 733}
734
735int kvm_s390_handle_e5(struct kvm_vcpu *vcpu)
736{
737 /* For e5xx... instructions we only handle TPROT */
738 if ((vcpu->arch.sie_block->ipa & 0x00ff) == 0x01)
739 return handle_tprot(vcpu);
740 return -EOPNOTSUPP;
741}
742
8c3f61e2
CH		 743static int handle_sckpf(struct kvm_vcpu *vcpu)
744{
745 u32 value;
746
747 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
208dd756 748 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
8c3f61e2
CH		 749
750 if (vcpu->run->s.regs.gprs[0] & 0x00000000ffff0000)
751 return kvm_s390_inject_program_int(vcpu,
752 PGM_SPECIFICATION);
753
754 value = vcpu->run->s.regs.gprs[0] & 0x000000000000ffff;
755 vcpu->arch.sie_block->todpr = value;
756
757 return 0;
758}
759
77975357 760static const intercept_handler_t x01_handlers[256] = {
8c3f61e2
CH		 761 [0x07] = handle_sckpf,
762};
763
764int kvm_s390_handle_01(struct kvm_vcpu *vcpu)
765{
766 intercept_handler_t handler;
767
768 handler = x01_handlers[vcpu->arch.sie_block->ipa & 0x00ff];
769 if (handler)
770 return handler(vcpu);
771 return -EOPNOTSUPP;
772}
Linux kernel - Deliverables
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