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KVM: s390: Helper for converting real addresses to absolute
[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. */
ea828ebf 167 kvm_s390_set_psw_cc(vcpu, cc);
453423dc
CB		 168 return 0;
169}
170
fa6b7fe9
CH		 171static int handle_tsch(struct kvm_vcpu *vcpu)
172{
173 struct kvm_s390_interrupt_info *inti;
174
175 inti = kvm_s390_get_io_int(vcpu->kvm, 0,
176 vcpu->run->s.regs.gprs[1]);
177
178 /*
179 * Prepare exit to userspace.
180 * We indicate whether we dequeued a pending I/O interrupt
181 * so that userspace can re-inject it if the instruction gets
182 * a program check. While this may re-order the pending I/O
183 * interrupts, this is no problem since the priority is kept
184 * intact.
185 */
186 vcpu->run->exit_reason = KVM_EXIT_S390_TSCH;
187 vcpu->run->s390_tsch.dequeued = !!inti;
188 if (inti) {
189 vcpu->run->s390_tsch.subchannel_id = inti->io.subchannel_id;
190 vcpu->run->s390_tsch.subchannel_nr = inti->io.subchannel_nr;
191 vcpu->run->s390_tsch.io_int_parm = inti->io.io_int_parm;
192 vcpu->run->s390_tsch.io_int_word = inti->io.io_int_word;
193 }
194 vcpu->run->s390_tsch.ipb = vcpu->arch.sie_block->ipb;
195 kfree(inti);
196 return -EREMOTE;
197}
198
199static int handle_io_inst(struct kvm_vcpu *vcpu)
200{
201 VCPU_EVENT(vcpu, 4, "%s", "I/O instruction");
202
5087dfa6
TH		 203 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
204 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
205
fa6b7fe9
CH		 206 if (vcpu->kvm->arch.css_support) {
207 /*
208 * Most I/O instructions will be handled by userspace.
209 * Exceptions are tpi and the interrupt portion of tsch.
210 */
211 if (vcpu->arch.sie_block->ipa == 0xb236)
212 return handle_tpi(vcpu);
213 if (vcpu->arch.sie_block->ipa == 0xb235)
214 return handle_tsch(vcpu);
215 /* Handle in userspace. */
216 return -EOPNOTSUPP;
217 } else {
218 /*
219 * Set condition code 3 to stop the guest from issueing channel
220 * I/O instructions.
221 */
ea828ebf 222 kvm_s390_set_psw_cc(vcpu, 3);
fa6b7fe9
CH		 223 return 0;
224 }
225}
226
453423dc
CB		 227static int handle_stfl(struct kvm_vcpu *vcpu)
228{
453423dc
CB		 229 int rc;
230
231 vcpu->stat.instruction_stfl++;
5087dfa6
TH		 232
233 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
234 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
235
453423dc 236 rc = copy_to_guest(vcpu, offsetof(struct _lowcore, stfl_fac_list),
78c4b59f 237 vfacilities, 4);
dc5008b9 238 if (rc)
db4a29cb 239 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
78c4b59f
MM		 240 VCPU_EVENT(vcpu, 5, "store facility list value %x",
241 *(unsigned int *) vfacilities);
242 trace_kvm_s390_handle_stfl(vcpu, *(unsigned int *) vfacilities);
453423dc
CB		 243 return 0;
244}
245
48a3e950
CH		 246static void handle_new_psw(struct kvm_vcpu *vcpu)
247{
248 /* Check whether the new psw is enabled for machine checks. */
249 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_MCHECK)
250 kvm_s390_deliver_pending_machine_checks(vcpu);
251}
252
253#define PSW_MASK_ADDR_MODE (PSW_MASK_EA | PSW_MASK_BA)
254#define PSW_MASK_UNASSIGNED 0xb80800fe7fffffffUL
d21683ea 255#define PSW_ADDR_24 0x0000000000ffffffUL
48a3e950
CH		 256#define PSW_ADDR_31 0x000000007fffffffUL
257
3736b874
HC		 258static int is_valid_psw(psw_t *psw) {
259 if (psw->mask & PSW_MASK_UNASSIGNED)
260 return 0;
261 if ((psw->mask & PSW_MASK_ADDR_MODE) == PSW_MASK_BA) {
262 if (psw->addr & ~PSW_ADDR_31)
263 return 0;
264 }
265 if (!(psw->mask & PSW_MASK_ADDR_MODE) && (psw->addr & ~PSW_ADDR_24))
266 return 0;
267 if ((psw->mask & PSW_MASK_ADDR_MODE) == PSW_MASK_EA)
268 return 0;
269 return 1;
270}
271
48a3e950
CH		 272int kvm_s390_handle_lpsw(struct kvm_vcpu *vcpu)
273{
3736b874 274 psw_t *gpsw = &vcpu->arch.sie_block->gpsw;
48a3e950 275 psw_compat_t new_psw;
3736b874 276 u64 addr;
48a3e950 277
3736b874 278 if (gpsw->mask & PSW_MASK_PSTATE)
208dd756
TH		 279 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
280
48a3e950 281 addr = kvm_s390_get_base_disp_s(vcpu);
6fd0fcc9
HC		 282 if (addr & 7)
283 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
6fd0fcc9
HC		 284 if (copy_from_guest(vcpu, &new_psw, addr, sizeof(new_psw)))
285 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
6fd0fcc9
HC		 286 if (!(new_psw.mask & PSW32_MASK_BASE))
287 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
3736b874
HC		 288 gpsw->mask = (new_psw.mask & ~PSW32_MASK_BASE) << 32;
289 gpsw->mask |= new_psw.addr & PSW32_ADDR_AMODE;
290 gpsw->addr = new_psw.addr & ~PSW32_ADDR_AMODE;
291 if (!is_valid_psw(gpsw))
6fd0fcc9 292 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
48a3e950 293 handle_new_psw(vcpu);
48a3e950
CH		 294 return 0;
295}
296
297static int handle_lpswe(struct kvm_vcpu *vcpu)
298{
48a3e950 299 psw_t new_psw;
3736b874 300 u64 addr;
48a3e950 301
5087dfa6
TH		 302 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
303 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
304
48a3e950 305 addr = kvm_s390_get_base_disp_s(vcpu);
6fd0fcc9
HC		 306 if (addr & 7)
307 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
6fd0fcc9
HC		 308 if (copy_from_guest(vcpu, &new_psw, addr, sizeof(new_psw)))
309 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
3736b874
HC		 310 vcpu->arch.sie_block->gpsw = new_psw;
311 if (!is_valid_psw(&vcpu->arch.sie_block->gpsw))
6fd0fcc9 312 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
48a3e950 313 handle_new_psw(vcpu);
48a3e950
CH		 314 return 0;
315}
316
453423dc
CB		 317static int handle_stidp(struct kvm_vcpu *vcpu)
318{
453423dc 319 u64 operand2;
453423dc
CB		 320
321 vcpu->stat.instruction_stidp++;
b1c571a5 322
5087dfa6
TH		 323 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
324 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
325
b1c571a5 326 operand2 = kvm_s390_get_base_disp_s(vcpu);
453423dc 327
db4a29cb
HC		 328 if (operand2 & 7)
329 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
453423dc 330
db4a29cb
HC		 331 if (put_guest(vcpu, vcpu->arch.stidp_data, (u64 __user *)operand2))
332 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
453423dc
CB		 333
334 VCPU_EVENT(vcpu, 5, "%s", "store cpu id");
453423dc
CB		 335 return 0;
336}
337
338static void handle_stsi_3_2_2(struct kvm_vcpu *vcpu, struct sysinfo_3_2_2 *mem)
339{
180c12fb 340 struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
453423dc
CB		 341 int cpus = 0;
342 int n;
343
b037a4f3 344 spin_lock(&fi->lock);
453423dc
CB		 345 for (n = 0; n < KVM_MAX_VCPUS; n++)
346 if (fi->local_int[n])
347 cpus++;
b037a4f3 348 spin_unlock(&fi->lock);
453423dc
CB		 349
350 /* deal with other level 3 hypervisors */
caf757c6 351 if (stsi(mem, 3, 2, 2))
453423dc
CB		 352 mem->count = 0;
353 if (mem->count < 8)
354 mem->count++;
355 for (n = mem->count - 1; n > 0 ; n--)
356 memcpy(&mem->vm[n], &mem->vm[n - 1], sizeof(mem->vm[0]));
357
358 mem->vm[0].cpus_total = cpus;
359 mem->vm[0].cpus_configured = cpus;
360 mem->vm[0].cpus_standby = 0;
361 mem->vm[0].cpus_reserved = 0;
362 mem->vm[0].caf = 1000;
363 memcpy(mem->vm[0].name, "KVMguest", 8);
364 ASCEBC(mem->vm[0].name, 8);
365 memcpy(mem->vm[0].cpi, "KVM/Linux ", 16);
366 ASCEBC(mem->vm[0].cpi, 16);
367}
368
369static int handle_stsi(struct kvm_vcpu *vcpu)
370{
5a32c1af
CB		 371 int fc = (vcpu->run->s.regs.gprs[0] & 0xf0000000) >> 28;
372 int sel1 = vcpu->run->s.regs.gprs[0] & 0xff;
373 int sel2 = vcpu->run->s.regs.gprs[1] & 0xffff;
c51f068c 374 unsigned long mem = 0;
453423dc 375 u64 operand2;
db4a29cb 376 int rc = 0;
453423dc
CB		 377
378 vcpu->stat.instruction_stsi++;
379 VCPU_EVENT(vcpu, 4, "stsi: fc: %x sel1: %x sel2: %x", fc, sel1, sel2);
380
5087dfa6
TH		 381 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
382 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
383
87d41fb4 384 if (fc > 3) {
ea828ebf 385 kvm_s390_set_psw_cc(vcpu, 3);
87d41fb4
TH		 386 return 0;
387 }
453423dc 388
87d41fb4
TH		 389 if (vcpu->run->s.regs.gprs[0] & 0x0fffff00
390 || vcpu->run->s.regs.gprs[1] & 0xffff0000)
453423dc
CB		 391 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
392
87d41fb4 393 if (fc == 0) {
5a32c1af 394 vcpu->run->s.regs.gprs[0] = 3 << 28;
ea828ebf 395 kvm_s390_set_psw_cc(vcpu, 0);
453423dc 396 return 0;
87d41fb4
TH		 397 }
398
399 operand2 = kvm_s390_get_base_disp_s(vcpu);
400
401 if (operand2 & 0xfff)
402 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
403
404 switch (fc) {
453423dc
CB		 405 case 1: /* same handling for 1 and 2 */
406 case 2:
407 mem = get_zeroed_page(GFP_KERNEL);
408 if (!mem)
c51f068c 409 goto out_no_data;
caf757c6 410 if (stsi((void *) mem, fc, sel1, sel2))
c51f068c 411 goto out_no_data;
453423dc
CB		 412 break;
413 case 3:
414 if (sel1 != 2 || sel2 != 2)
c51f068c 415 goto out_no_data;
453423dc
CB		 416 mem = get_zeroed_page(GFP_KERNEL);
417 if (!mem)
c51f068c 418 goto out_no_data;
453423dc
CB		 419 handle_stsi_3_2_2(vcpu, (void *) mem);
420 break;
453423dc
CB		 421 }
422
423 if (copy_to_guest_absolute(vcpu, operand2, (void *) mem, PAGE_SIZE)) {
db4a29cb 424 rc = kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
c51f068c 425 goto out_exception;
453423dc 426 }
5786fffa 427 trace_kvm_s390_handle_stsi(vcpu, fc, sel1, sel2, operand2);
453423dc 428 free_page(mem);
ea828ebf 429 kvm_s390_set_psw_cc(vcpu, 0);
5a32c1af 430 vcpu->run->s.regs.gprs[0] = 0;
453423dc 431 return 0;
c51f068c 432out_no_data:
ea828ebf 433 kvm_s390_set_psw_cc(vcpu, 3);
c51f068c
HC		 434out_exception:
435 free_page(mem);
db4a29cb 436 return rc;
453423dc
CB		 437}
438
f379aae5 439static const intercept_handler_t b2_handlers[256] = {
453423dc
CB		 440 [0x02] = handle_stidp,
441 [0x10] = handle_set_prefix,
442 [0x11] = handle_store_prefix,
443 [0x12] = handle_store_cpu_address,
444 [0x29] = handle_skey,
445 [0x2a] = handle_skey,
446 [0x2b] = handle_skey,
f379aae5
CH		 447 [0x30] = handle_io_inst,
448 [0x31] = handle_io_inst,
449 [0x32] = handle_io_inst,
450 [0x33] = handle_io_inst,
451 [0x34] = handle_io_inst,
452 [0x35] = handle_io_inst,
453 [0x36] = handle_io_inst,
454 [0x37] = handle_io_inst,
455 [0x38] = handle_io_inst,
456 [0x39] = handle_io_inst,
457 [0x3a] = handle_io_inst,
458 [0x3b] = handle_io_inst,
459 [0x3c] = handle_io_inst,
460 [0x5f] = handle_io_inst,
461 [0x74] = handle_io_inst,
462 [0x76] = handle_io_inst,
453423dc
CB		 463 [0x7d] = handle_stsi,
464 [0xb1] = handle_stfl,
48a3e950 465 [0xb2] = handle_lpswe,
453423dc
CB		 466};
467
70455a36 468int kvm_s390_handle_b2(struct kvm_vcpu *vcpu)
453423dc
CB		 469{
470 intercept_handler_t handler;
471
70455a36 472 /*
5087dfa6
TH		 473 * A lot of B2 instructions are priviledged. Here we check for
474 * the privileged ones, that we can handle in the kernel.
475 * Anything else goes to userspace.
476 */
f379aae5 477 handler = b2_handlers[vcpu->arch.sie_block->ipa & 0x00ff];
5087dfa6
TH		 478 if (handler)
479 return handler(vcpu);
480
b8e660b8 481 return -EOPNOTSUPP;
453423dc 482}
bb25b9ba 483
48a3e950
CH		 484static int handle_epsw(struct kvm_vcpu *vcpu)
485{
486 int reg1, reg2;
487
aeb87c3c 488 kvm_s390_get_regs_rre(vcpu, &reg1, &reg2);
48a3e950
CH		 489
490 /* This basically extracts the mask half of the psw. */
843200e7 491 vcpu->run->s.regs.gprs[reg1] &= 0xffffffff00000000UL;
48a3e950
CH		 492 vcpu->run->s.regs.gprs[reg1] |= vcpu->arch.sie_block->gpsw.mask >> 32;
493 if (reg2) {
843200e7 494 vcpu->run->s.regs.gprs[reg2] &= 0xffffffff00000000UL;
48a3e950 495 vcpu->run->s.regs.gprs[reg2] |=
843200e7 496 vcpu->arch.sie_block->gpsw.mask & 0x00000000ffffffffUL;
48a3e950
CH		 497 }
498 return 0;
499}
500
69d0d3a3
CB		 501#define PFMF_RESERVED 0xfffc0101UL
502#define PFMF_SK 0x00020000UL
503#define PFMF_CF 0x00010000UL
504#define PFMF_UI 0x00008000UL
505#define PFMF_FSC 0x00007000UL
506#define PFMF_NQ 0x00000800UL
507#define PFMF_MR 0x00000400UL
508#define PFMF_MC 0x00000200UL
509#define PFMF_KEY 0x000000feUL
510
511static int handle_pfmf(struct kvm_vcpu *vcpu)
512{
513 int reg1, reg2;
514 unsigned long start, end;
515
516 vcpu->stat.instruction_pfmf++;
517
518 kvm_s390_get_regs_rre(vcpu, &reg1, &reg2);
519
520 if (!MACHINE_HAS_PFMF)
521 return kvm_s390_inject_program_int(vcpu, PGM_OPERATION);
522
523 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
208dd756 524 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
69d0d3a3
CB		 525
526 if (vcpu->run->s.regs.gprs[reg1] & PFMF_RESERVED)
527 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
528
529 /* Only provide non-quiescing support if the host supports it */
e769ece3 530 if (vcpu->run->s.regs.gprs[reg1] & PFMF_NQ && !test_facility(14))
69d0d3a3
CB		 531 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
532
533 /* No support for conditional-SSKE */
534 if (vcpu->run->s.regs.gprs[reg1] & (PFMF_MR | PFMF_MC))
535 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
536
537 start = vcpu->run->s.regs.gprs[reg2] & PAGE_MASK;
538 switch (vcpu->run->s.regs.gprs[reg1] & PFMF_FSC) {
539 case 0x00000000:
540 end = (start + (1UL << 12)) & ~((1UL << 12) - 1);
541 break;
542 case 0x00001000:
543 end = (start + (1UL << 20)) & ~((1UL << 20) - 1);
544 break;
545 /* We dont support EDAT2
546 case 0x00002000:
547 end = (start + (1UL << 31)) & ~((1UL << 31) - 1);
548 break;*/
549 default:
550 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
551 }
552 while (start < end) {
553 unsigned long useraddr;
554
555 useraddr = gmap_translate(start, vcpu->arch.gmap);
556 if (IS_ERR((void *)useraddr))
557 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
558
559 if (vcpu->run->s.regs.gprs[reg1] & PFMF_CF) {
560 if (clear_user((void __user *)useraddr, PAGE_SIZE))
561 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
562 }
563
564 if (vcpu->run->s.regs.gprs[reg1] & PFMF_SK) {
565 if (set_guest_storage_key(current->mm, useraddr,
566 vcpu->run->s.regs.gprs[reg1] & PFMF_KEY,
567 vcpu->run->s.regs.gprs[reg1] & PFMF_NQ))
568 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
569 }
570
571 start += PAGE_SIZE;
572 }
573 if (vcpu->run->s.regs.gprs[reg1] & PFMF_FSC)
574 vcpu->run->s.regs.gprs[reg2] = end;
575 return 0;
576}
577
48a3e950
CH		 578static const intercept_handler_t b9_handlers[256] = {
579 [0x8d] = handle_epsw,
f379aae5 580 [0x9c] = handle_io_inst,
69d0d3a3 581 [0xaf] = handle_pfmf,
48a3e950
CH		 582};
583
584int kvm_s390_handle_b9(struct kvm_vcpu *vcpu)
585{
586 intercept_handler_t handler;
587
588 /* This is handled just as for the B2 instructions. */
589 handler = b9_handlers[vcpu->arch.sie_block->ipa & 0x00ff];
5087dfa6
TH		 590 if (handler)
591 return handler(vcpu);
592
48a3e950
CH		 593 return -EOPNOTSUPP;
594}
595
953ed88d
TH		 596int kvm_s390_handle_lctl(struct kvm_vcpu *vcpu)
597{
598 int reg1 = (vcpu->arch.sie_block->ipa & 0x00f0) >> 4;
599 int reg3 = vcpu->arch.sie_block->ipa & 0x000f;
600 u64 useraddr;
601 u32 val = 0;
602 int reg, rc;
603
604 vcpu->stat.instruction_lctl++;
605
606 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
607 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
608
609 useraddr = kvm_s390_get_base_disp_rs(vcpu);
610
611 if (useraddr & 3)
612 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
613
614 VCPU_EVENT(vcpu, 5, "lctl r1:%x, r3:%x, addr:%llx", reg1, reg3,
615 useraddr);
616 trace_kvm_s390_handle_lctl(vcpu, 0, reg1, reg3, useraddr);
617
618 reg = reg1;
619 do {
620 rc = get_guest(vcpu, val, (u32 __user *) useraddr);
621 if (rc)
622 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
623 vcpu->arch.sie_block->gcr[reg] &= 0xffffffff00000000ul;
624 vcpu->arch.sie_block->gcr[reg] |= val;
625 useraddr += 4;
626 if (reg == reg3)
627 break;
628 reg = (reg + 1) % 16;
629 } while (1);
630
631 return 0;
632}
633
634static int handle_lctlg(struct kvm_vcpu *vcpu)
635{
636 int reg1 = (vcpu->arch.sie_block->ipa & 0x00f0) >> 4;
637 int reg3 = vcpu->arch.sie_block->ipa & 0x000f;
638 u64 useraddr;
639 int reg, rc;
640
641 vcpu->stat.instruction_lctlg++;
642
643 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
644 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
645
646 useraddr = kvm_s390_get_base_disp_rsy(vcpu);
647
648 if (useraddr & 7)
649 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
650
651 reg = reg1;
652
653 VCPU_EVENT(vcpu, 5, "lctlg r1:%x, r3:%x, addr:%llx", reg1, reg3,
654 useraddr);
655 trace_kvm_s390_handle_lctl(vcpu, 1, reg1, reg3, useraddr);
656
657 do {
658 rc = get_guest(vcpu, vcpu->arch.sie_block->gcr[reg],
659 (u64 __user *) useraddr);
660 if (rc)
661 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
662 useraddr += 8;
663 if (reg == reg3)
664 break;
665 reg = (reg + 1) % 16;
666 } while (1);
667
668 return 0;
669}
670
f379aae5 671static const intercept_handler_t eb_handlers[256] = {
953ed88d 672 [0x2f] = handle_lctlg,
f379aae5
CH		 673 [0x8a] = handle_io_inst,
674};
675
953ed88d 676int kvm_s390_handle_eb(struct kvm_vcpu *vcpu)
f379aae5
CH		 677{
678 intercept_handler_t handler;
679
f379aae5
CH		 680 handler = eb_handlers[vcpu->arch.sie_block->ipb & 0xff];
681 if (handler)
682 return handler(vcpu);
683 return -EOPNOTSUPP;
684}
685
bb25b9ba
CB		 686static int handle_tprot(struct kvm_vcpu *vcpu)
687{
b1c571a5 688 u64 address1, address2;
bb25b9ba 689 struct vm_area_struct *vma;
1eddb85f 690 unsigned long user_address;
bb25b9ba
CB		 691
692 vcpu->stat.instruction_tprot++;
693
f9f6bbc6
TH		 694 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
695 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
696
b1c571a5
CH		 697 kvm_s390_get_base_disp_sse(vcpu, &address1, &address2);
698
bb25b9ba
CB		 699 /* we only handle the Linux memory detection case:
700 * access key == 0
701 * guest DAT == off
702 * everything else goes to userspace. */
703 if (address2 & 0xf0)
704 return -EOPNOTSUPP;
705 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_DAT)
706 return -EOPNOTSUPP;
707
bb25b9ba 708 down_read(&current->mm->mmap_sem);
59a1fa2d
HC		 709 user_address = __gmap_translate(address1, vcpu->arch.gmap);
710 if (IS_ERR_VALUE(user_address))
711 goto out_inject;
1eddb85f 712 vma = find_vma(current->mm, user_address);
59a1fa2d
HC		 713 if (!vma)
714 goto out_inject;
bb25b9ba
CB		 715 vcpu->arch.sie_block->gpsw.mask &= ~(3ul << 44);
716 if (!(vma->vm_flags & VM_WRITE) && (vma->vm_flags & VM_READ))
717 vcpu->arch.sie_block->gpsw.mask |= (1ul << 44);
718 if (!(vma->vm_flags & VM_WRITE) && !(vma->vm_flags & VM_READ))
719 vcpu->arch.sie_block->gpsw.mask |= (2ul << 44);
720
721 up_read(&current->mm->mmap_sem);
722 return 0;
59a1fa2d
HC		 723
724out_inject:
725 up_read(&current->mm->mmap_sem);
726 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
bb25b9ba
CB		 727}
728
729int kvm_s390_handle_e5(struct kvm_vcpu *vcpu)
730{
731 /* For e5xx... instructions we only handle TPROT */
732 if ((vcpu->arch.sie_block->ipa & 0x00ff) == 0x01)
733 return handle_tprot(vcpu);
734 return -EOPNOTSUPP;
735}
736
8c3f61e2
CH		 737static int handle_sckpf(struct kvm_vcpu *vcpu)
738{
739 u32 value;
740
741 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
208dd756 742 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
8c3f61e2
CH		 743
744 if (vcpu->run->s.regs.gprs[0] & 0x00000000ffff0000)
745 return kvm_s390_inject_program_int(vcpu,
746 PGM_SPECIFICATION);
747
748 value = vcpu->run->s.regs.gprs[0] & 0x000000000000ffff;
749 vcpu->arch.sie_block->todpr = value;
750
751 return 0;
752}
753
77975357 754static const intercept_handler_t x01_handlers[256] = {
8c3f61e2
CH		 755 [0x07] = handle_sckpf,
756};
757
758int kvm_s390_handle_01(struct kvm_vcpu *vcpu)
759{
760 intercept_handler_t handler;
761
762 handler = x01_handlers[vcpu->arch.sie_block->ipa & 0x00ff];
763 if (handler)
764 return handler(vcpu);
765 return -EOPNOTSUPP;
766}
Linux kernel - Deliverables
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