arch/s390/kvm/priv.c

   1 /*
   2  * handling privileged instructions
   3  *
   4  * Copyright IBM Corp. 2008
   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>
  15 #include <linux/gfp.h>
  16 #include <linux/errno.h>
  17 #include <asm/asm-offsets.h>
  18 #include <asm/current.h>
  19 #include <asm/debug.h>
  20 #include <asm/ebcdic.h>
  21 #include <asm/sysinfo.h>
  22 #include <asm/ptrace.h>
  23 #include <asm/compat.h>
  24 #include "gaccess.h"
  25 #include "kvm-s390.h"
  26 #include "trace.h"
  27
  28 static int handle_set_prefix(struct kvm_vcpu *vcpu)
  29 {
  30         u64 operand2;
  31         u32 address = 0;
  32         u8 tmp;
  33
  34         vcpu->stat.instruction_spx++;
  35
  36         operand2 = kvm_s390_get_base_disp_s(vcpu);
  37
  38         /* must be word boundary */
  39         if (operand2 & 3) {
  40                 kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
  41                 goto out;
  42         }
  43
  44         /* get the value */
  45         if (get_guest(vcpu, address, (u32 __user *) operand2)) {
  46                 kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
  47                 goto out;
  48         }
  49
  50         address = address & 0x7fffe000u;
  51
  52         /* make sure that the new value is valid memory */
  53         if (copy_from_guest_absolute(vcpu, &tmp, address, 1) ||
  54            (copy_from_guest_absolute(vcpu, &tmp, address + PAGE_SIZE, 1))) {
  55                 kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
  56                 goto out;
  57         }
  58
  59         kvm_s390_set_prefix(vcpu, address);
  60
  61         VCPU_EVENT(vcpu, 5, "setting prefix to %x", address);
  62         trace_kvm_s390_handle_prefix(vcpu, 1, address);
  63 out:
  64         return 0;
  65 }
  66
  67 static int handle_store_prefix(struct kvm_vcpu *vcpu)
  68 {
  69         u64 operand2;
  70         u32 address;
  71
  72         vcpu->stat.instruction_stpx++;
  73
  74         operand2 = kvm_s390_get_base_disp_s(vcpu);
  75
  76         /* must be word boundary */
  77         if (operand2 & 3) {
  78                 kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
  79                 goto out;
  80         }
  81
  82         address = vcpu->arch.sie_block->prefix;
  83         address = address & 0x7fffe000u;
  84
  85         /* get the value */
  86         if (put_guest(vcpu, address, (u32 __user *)operand2)) {
  87                 kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
  88                 goto out;
  89         }
  90
  91         VCPU_EVENT(vcpu, 5, "storing prefix to %x", address);
  92         trace_kvm_s390_handle_prefix(vcpu, 0, address);
  93 out:
  94         return 0;
  95 }
  96
  97 static int handle_store_cpu_address(struct kvm_vcpu *vcpu)
  98 {
  99         u64 useraddr;
 100         int rc;
 101
 102         vcpu->stat.instruction_stap++;
 103
 104         useraddr = kvm_s390_get_base_disp_s(vcpu);
 105
 106         if (useraddr & 1) {
 107                 kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
 108                 goto out;
 109         }
 110
 111         rc = put_guest(vcpu, vcpu->vcpu_id, (u16 __user *)useraddr);
 112         if (rc) {
 113                 kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
 114                 goto out;
 115         }
 116
 117         VCPU_EVENT(vcpu, 5, "storing cpu address to %llx", useraddr);
 118         trace_kvm_s390_handle_stap(vcpu, useraddr);
 119 out:
 120         return 0;
 121 }
 122
 123 static int handle_skey(struct kvm_vcpu *vcpu)
 124 {
 125         vcpu->stat.instruction_storage_key++;
 126         vcpu->arch.sie_block->gpsw.addr -= 4;
 127         VCPU_EVENT(vcpu, 4, "%s", "retrying storage key operation");
 128         return 0;
 129 }
 130
 131 static int handle_tpi(struct kvm_vcpu *vcpu)
 132 {
 133         struct kvm_s390_interrupt_info *inti;
 134         u64 addr;
 135         int cc;
 136
 137         addr = kvm_s390_get_base_disp_s(vcpu);
 138         if (addr & 3) {
 139                 kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
 140                 goto out;
 141         }
 142         cc = 0;
 143         inti = kvm_s390_get_io_int(vcpu->kvm, vcpu->run->s.regs.crs[6], 0);
 144         if (!inti)
 145                 goto no_interrupt;
 146         cc = 1;
 147         if (addr) {
 148                 /*
 149                  * Store the two-word I/O interruption code into the
 150                  * provided area.
 151                  */
 152                 put_guest(vcpu, inti->io.subchannel_id, (u16 __user *) addr);
 153                 put_guest(vcpu, inti->io.subchannel_nr, (u16 __user *) (addr + 2));
 154                 put_guest(vcpu, inti->io.io_int_parm, (u32 __user *) (addr + 4));
 155         } else {
 156                 /*
 157                  * Store the three-word I/O interruption code into
 158                  * the appropriate lowcore area.
 159                  */
 160                 put_guest(vcpu, inti->io.subchannel_id, (u16 __user *) __LC_SUBCHANNEL_ID);
 161                 put_guest(vcpu, inti->io.subchannel_nr, (u16 __user *) __LC_SUBCHANNEL_NR);
 162                 put_guest(vcpu, inti->io.io_int_parm, (u32 __user *) __LC_IO_INT_PARM);
 163                 put_guest(vcpu, inti->io.io_int_word, (u32 __user *) __LC_IO_INT_WORD);
 164         }
 165         kfree(inti);
 166 no_interrupt:
 167         /* Set condition code and we're done. */
 168         vcpu->arch.sie_block->gpsw.mask &= ~(3ul << 44);
 169         vcpu->arch.sie_block->gpsw.mask |= (cc & 3ul) << 44;
 170 out:
 171         return 0;
 172 }
 173
 174 static int handle_tsch(struct kvm_vcpu *vcpu)
 175 {
 176         struct kvm_s390_interrupt_info *inti;
 177
 178         inti = kvm_s390_get_io_int(vcpu->kvm, 0,
 179                                    vcpu->run->s.regs.gprs[1]);
 180
 181         /*
 182          * Prepare exit to userspace.
 183          * We indicate whether we dequeued a pending I/O interrupt
 184          * so that userspace can re-inject it if the instruction gets
 185          * a program check. While this may re-order the pending I/O
 186          * interrupts, this is no problem since the priority is kept
 187          * intact.
 188          */
 189         vcpu->run->exit_reason = KVM_EXIT_S390_TSCH;
 190         vcpu->run->s390_tsch.dequeued = !!inti;
 191         if (inti) {
 192                 vcpu->run->s390_tsch.subchannel_id = inti->io.subchannel_id;
 193                 vcpu->run->s390_tsch.subchannel_nr = inti->io.subchannel_nr;
 194                 vcpu->run->s390_tsch.io_int_parm = inti->io.io_int_parm;
 195                 vcpu->run->s390_tsch.io_int_word = inti->io.io_int_word;
 196         }
 197         vcpu->run->s390_tsch.ipb = vcpu->arch.sie_block->ipb;
 198         kfree(inti);
 199         return -EREMOTE;
 200 }
 201
 202 static int handle_io_inst(struct kvm_vcpu *vcpu)
 203 {
 204         VCPU_EVENT(vcpu, 4, "%s", "I/O instruction");
 205
 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                  */
 222                 vcpu->arch.sie_block->gpsw.mask &= ~(3ul << 44);
 223                 vcpu->arch.sie_block->gpsw.mask |= (3 & 3ul) << 44;
 224                 return 0;
 225         }
 226 }
 227
 228 static int handle_stfl(struct kvm_vcpu *vcpu)
 229 {
 230         unsigned int facility_list;
 231         int rc;
 232
 233         vcpu->stat.instruction_stfl++;
 234         /* only pass the facility bits, which we can handle */
 235         facility_list = S390_lowcore.stfl_fac_list & 0xff00fff3;
 236
 237         rc = copy_to_guest(vcpu, offsetof(struct _lowcore, stfl_fac_list),
 238                            &facility_list, sizeof(facility_list));
 239         if (rc)
 240                 kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
 241         else {
 242                 VCPU_EVENT(vcpu, 5, "store facility list value %x",
 243                            facility_list);
 244                 trace_kvm_s390_handle_stfl(vcpu, facility_list);
 245         }
 246         return 0;
 247 }
 248
 249 static void handle_new_psw(struct kvm_vcpu *vcpu)
 250 {
 251         /* Check whether the new psw is enabled for machine checks. */
 252         if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_MCHECK)
 253                 kvm_s390_deliver_pending_machine_checks(vcpu);
 254 }
 255
 256 #define PSW_MASK_ADDR_MODE (PSW_MASK_EA | PSW_MASK_BA)
 257 #define PSW_MASK_UNASSIGNED 0xb80800fe7fffffffUL
 258 #define PSW_ADDR_24 0x0000000000ffffffUL
 259 #define PSW_ADDR_31 0x000000007fffffffUL
 260
 261 int kvm_s390_handle_lpsw(struct kvm_vcpu *vcpu)
 262 {
 263         u64 addr;
 264         psw_compat_t new_psw;
 265
 266         if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
 267                 return kvm_s390_inject_program_int(vcpu,
 268                                                    PGM_PRIVILEGED_OPERATION);
 269
 270         addr = kvm_s390_get_base_disp_s(vcpu);
 271
 272         if (addr & 7) {
 273                 kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
 274                 goto out;
 275         }
 276
 277         if (copy_from_guest(vcpu, &new_psw, addr, sizeof(new_psw))) {
 278                 kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
 279                 goto out;
 280         }
 281
 282         if (!(new_psw.mask & PSW32_MASK_BASE)) {
 283                 kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
 284                 goto out;
 285         }
 286
 287         vcpu->arch.sie_block->gpsw.mask =
 288                 (new_psw.mask & ~PSW32_MASK_BASE) << 32;
 289         vcpu->arch.sie_block->gpsw.addr = new_psw.addr;
 290
 291         if ((vcpu->arch.sie_block->gpsw.mask & PSW_MASK_UNASSIGNED) ||
 292             (!(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_ADDR_MODE) &&
 293              (vcpu->arch.sie_block->gpsw.addr & ~PSW_ADDR_24)) ||
 294             ((vcpu->arch.sie_block->gpsw.mask & PSW_MASK_ADDR_MODE) ==
 295              PSW_MASK_EA)) {
 296                 kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
 297                 goto out;
 298         }
 299
 300         handle_new_psw(vcpu);
 301 out:
 302         return 0;
 303 }
 304
 305 static int handle_lpswe(struct kvm_vcpu *vcpu)
 306 {
 307         u64 addr;
 308         psw_t new_psw;
 309
 310         addr = kvm_s390_get_base_disp_s(vcpu);
 311
 312         if (addr & 7) {
 313                 kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
 314                 goto out;
 315         }
 316
 317         if (copy_from_guest(vcpu, &new_psw, addr, sizeof(new_psw))) {
 318                 kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
 319                 goto out;
 320         }
 321
 322         vcpu->arch.sie_block->gpsw.mask = new_psw.mask;
 323         vcpu->arch.sie_block->gpsw.addr = new_psw.addr;
 324
 325         if ((vcpu->arch.sie_block->gpsw.mask & PSW_MASK_UNASSIGNED) ||
 326             (((vcpu->arch.sie_block->gpsw.mask & PSW_MASK_ADDR_MODE) ==
 327               PSW_MASK_BA) &&
 328              (vcpu->arch.sie_block->gpsw.addr & ~PSW_ADDR_31)) ||
 329             (!(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_ADDR_MODE) &&
 330              (vcpu->arch.sie_block->gpsw.addr & ~PSW_ADDR_24)) ||
 331             ((vcpu->arch.sie_block->gpsw.mask & PSW_MASK_ADDR_MODE) ==
 332              PSW_MASK_EA)) {
 333                 kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
 334                 goto out;
 335         }
 336
 337         handle_new_psw(vcpu);
 338 out:
 339         return 0;
 340 }
 341
 342 static int handle_stidp(struct kvm_vcpu *vcpu)
 343 {
 344         u64 operand2;
 345         int rc;
 346
 347         vcpu->stat.instruction_stidp++;
 348
 349         operand2 = kvm_s390_get_base_disp_s(vcpu);
 350
 351         if (operand2 & 7) {
 352                 kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
 353                 goto out;
 354         }
 355
 356         rc = put_guest(vcpu, vcpu->arch.stidp_data, (u64 __user *)operand2);
 357         if (rc) {
 358                 kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
 359                 goto out;
 360         }
 361
 362         VCPU_EVENT(vcpu, 5, "%s", "store cpu id");
 363 out:
 364         return 0;
 365 }
 366
 367 static void handle_stsi_3_2_2(struct kvm_vcpu *vcpu, struct sysinfo_3_2_2 *mem)
 368 {
 369         struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
 370         int cpus = 0;
 371         int n;
 372
 373         spin_lock(&fi->lock);
 374         for (n = 0; n < KVM_MAX_VCPUS; n++)
 375                 if (fi->local_int[n])
 376                         cpus++;
 377         spin_unlock(&fi->lock);
 378
 379         /* deal with other level 3 hypervisors */
 380         if (stsi(mem, 3, 2, 2))
 381                 mem->count = 0;
 382         if (mem->count < 8)
 383                 mem->count++;
 384         for (n = mem->count - 1; n > 0 ; n--)
 385                 memcpy(&mem->vm[n], &mem->vm[n - 1], sizeof(mem->vm[0]));
 386
 387         mem->vm[0].cpus_total = cpus;
 388         mem->vm[0].cpus_configured = cpus;
 389         mem->vm[0].cpus_standby = 0;
 390         mem->vm[0].cpus_reserved = 0;
 391         mem->vm[0].caf = 1000;
 392         memcpy(mem->vm[0].name, "KVMguest", 8);
 393         ASCEBC(mem->vm[0].name, 8);
 394         memcpy(mem->vm[0].cpi, "KVM/Linux       ", 16);
 395         ASCEBC(mem->vm[0].cpi, 16);
 396 }
 397
 398 static int handle_stsi(struct kvm_vcpu *vcpu)
 399 {
 400         int fc = (vcpu->run->s.regs.gprs[0] & 0xf0000000) >> 28;
 401         int sel1 = vcpu->run->s.regs.gprs[0] & 0xff;
 402         int sel2 = vcpu->run->s.regs.gprs[1] & 0xffff;
 403         u64 operand2;
 404         unsigned long mem;
 405
 406         vcpu->stat.instruction_stsi++;
 407         VCPU_EVENT(vcpu, 4, "stsi: fc: %x sel1: %x sel2: %x", fc, sel1, sel2);
 408
 409         operand2 = kvm_s390_get_base_disp_s(vcpu);
 410
 411         if (operand2 & 0xfff && fc > 0)
 412                 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
 413
 414         switch (fc) {
 415         case 0:
 416                 vcpu->run->s.regs.gprs[0] = 3 << 28;
 417                 vcpu->arch.sie_block->gpsw.mask &= ~(3ul << 44);
 418                 return 0;
 419         case 1: /* same handling for 1 and 2 */
 420         case 2:
 421                 mem = get_zeroed_page(GFP_KERNEL);
 422                 if (!mem)
 423                         goto out_fail;
 424                 if (stsi((void *) mem, fc, sel1, sel2))
 425                         goto out_mem;
 426                 break;
 427         case 3:
 428                 if (sel1 != 2 || sel2 != 2)
 429                         goto out_fail;
 430                 mem = get_zeroed_page(GFP_KERNEL);
 431                 if (!mem)
 432                         goto out_fail;
 433                 handle_stsi_3_2_2(vcpu, (void *) mem);
 434                 break;
 435         default:
 436                 goto out_fail;
 437         }
 438
 439         if (copy_to_guest_absolute(vcpu, operand2, (void *) mem, PAGE_SIZE)) {
 440                 kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
 441                 goto out_mem;
 442         }
 443         trace_kvm_s390_handle_stsi(vcpu, fc, sel1, sel2, operand2);
 444         free_page(mem);
 445         vcpu->arch.sie_block->gpsw.mask &= ~(3ul << 44);
 446         vcpu->run->s.regs.gprs[0] = 0;
 447         return 0;
 448 out_mem:
 449         free_page(mem);
 450 out_fail:
 451         /* condition code 3 */
 452         vcpu->arch.sie_block->gpsw.mask |= 3ul << 44;
 453         return 0;
 454 }
 455
 456 static const intercept_handler_t b2_handlers[256] = {
 457         [0x02] = handle_stidp,
 458         [0x10] = handle_set_prefix,
 459         [0x11] = handle_store_prefix,
 460         [0x12] = handle_store_cpu_address,
 461         [0x29] = handle_skey,
 462         [0x2a] = handle_skey,
 463         [0x2b] = handle_skey,
 464         [0x30] = handle_io_inst,
 465         [0x31] = handle_io_inst,
 466         [0x32] = handle_io_inst,
 467         [0x33] = handle_io_inst,
 468         [0x34] = handle_io_inst,
 469         [0x35] = handle_io_inst,
 470         [0x36] = handle_io_inst,
 471         [0x37] = handle_io_inst,
 472         [0x38] = handle_io_inst,
 473         [0x39] = handle_io_inst,
 474         [0x3a] = handle_io_inst,
 475         [0x3b] = handle_io_inst,
 476         [0x3c] = handle_io_inst,
 477         [0x5f] = handle_io_inst,
 478         [0x74] = handle_io_inst,
 479         [0x76] = handle_io_inst,
 480         [0x7d] = handle_stsi,
 481         [0xb1] = handle_stfl,
 482         [0xb2] = handle_lpswe,
 483 };
 484
 485 int kvm_s390_handle_b2(struct kvm_vcpu *vcpu)
 486 {
 487         intercept_handler_t handler;
 488
 489         /*
 490          * a lot of B2 instructions are priviledged. We first check for
 491          * the privileged ones, that we can handle in the kernel. If the
 492          * kernel can handle this instruction, we check for the problem
 493          * state bit and (a) handle the instruction or (b) send a code 2
 494          * program check.
 495          * Anything else goes to userspace.*/
 496         handler = b2_handlers[vcpu->arch.sie_block->ipa & 0x00ff];
 497         if (handler) {
 498                 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
 499                         return kvm_s390_inject_program_int(vcpu,
 500                                                    PGM_PRIVILEGED_OPERATION);
 501                 else
 502                         return handler(vcpu);
 503         }
 504         return -EOPNOTSUPP;
 505 }
 506
 507 static int handle_epsw(struct kvm_vcpu *vcpu)
 508 {
 509         int reg1, reg2;
 510
 511         reg1 = (vcpu->arch.sie_block->ipb & 0x00f00000) >> 24;
 512         reg2 = (vcpu->arch.sie_block->ipb & 0x000f0000) >> 16;
 513
 514         /* This basically extracts the mask half of the psw. */
 515         vcpu->run->s.regs.gprs[reg1] &= 0xffffffff00000000;
 516         vcpu->run->s.regs.gprs[reg1] |= vcpu->arch.sie_block->gpsw.mask >> 32;
 517         if (reg2) {
 518                 vcpu->run->s.regs.gprs[reg2] &= 0xffffffff00000000;
 519                 vcpu->run->s.regs.gprs[reg2] |=
 520                         vcpu->arch.sie_block->gpsw.mask & 0x00000000ffffffff;
 521         }
 522         return 0;
 523 }
 524
 525 static const intercept_handler_t b9_handlers[256] = {
 526         [0x8d] = handle_epsw,
 527         [0x9c] = handle_io_inst,
 528 };
 529
 530 int kvm_s390_handle_b9(struct kvm_vcpu *vcpu)
 531 {
 532         intercept_handler_t handler;
 533
 534         /* This is handled just as for the B2 instructions. */
 535         handler = b9_handlers[vcpu->arch.sie_block->ipa & 0x00ff];
 536         if (handler) {
 537                 if ((handler != handle_epsw) &&
 538                     (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE))
 539                         return kvm_s390_inject_program_int(vcpu,
 540                                                    PGM_PRIVILEGED_OPERATION);
 541                 else
 542                         return handler(vcpu);
 543         }
 544         return -EOPNOTSUPP;
 545 }
 546
 547 static const intercept_handler_t eb_handlers[256] = {
 548         [0x8a] = handle_io_inst,
 549 };
 550
 551 int kvm_s390_handle_priv_eb(struct kvm_vcpu *vcpu)
 552 {
 553         intercept_handler_t handler;
 554
 555         /* All eb instructions that end up here are privileged. */
 556         if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
 557                 return kvm_s390_inject_program_int(vcpu,
 558                                                    PGM_PRIVILEGED_OPERATION);
 559         handler = eb_handlers[vcpu->arch.sie_block->ipb & 0xff];
 560         if (handler)
 561                 return handler(vcpu);
 562         return -EOPNOTSUPP;
 563 }
 564
 565 static int handle_tprot(struct kvm_vcpu *vcpu)
 566 {
 567         u64 address1, address2;
 568         struct vm_area_struct *vma;
 569         unsigned long user_address;
 570
 571         vcpu->stat.instruction_tprot++;
 572
 573         kvm_s390_get_base_disp_sse(vcpu, &address1, &address2);
 574
 575         /* we only handle the Linux memory detection case:
 576          * access key == 0
 577          * guest DAT == off
 578          * everything else goes to userspace. */
 579         if (address2 & 0xf0)
 580                 return -EOPNOTSUPP;
 581         if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_DAT)
 582                 return -EOPNOTSUPP;
 583
 584         down_read(&current->mm->mmap_sem);
 585         user_address = __gmap_translate(address1, vcpu->arch.gmap);
 586         if (IS_ERR_VALUE(user_address))
 587                 goto out_inject;
 588         vma = find_vma(current->mm, user_address);
 589         if (!vma)
 590                 goto out_inject;
 591         vcpu->arch.sie_block->gpsw.mask &= ~(3ul << 44);
 592         if (!(vma->vm_flags & VM_WRITE) && (vma->vm_flags & VM_READ))
 593                 vcpu->arch.sie_block->gpsw.mask |= (1ul << 44);
 594         if (!(vma->vm_flags & VM_WRITE) && !(vma->vm_flags & VM_READ))
 595                 vcpu->arch.sie_block->gpsw.mask |= (2ul << 44);
 596
 597         up_read(&current->mm->mmap_sem);
 598         return 0;
 599
 600 out_inject:
 601         up_read(&current->mm->mmap_sem);
 602         return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
 603 }
 604
 605 int kvm_s390_handle_e5(struct kvm_vcpu *vcpu)
 606 {
 607         /* For e5xx... instructions we only handle TPROT */
 608         if ((vcpu->arch.sie_block->ipa & 0x00ff) == 0x01)
 609                 return handle_tprot(vcpu);
 610         return -EOPNOTSUPP;
 611 }
 612
 613 static int handle_sckpf(struct kvm_vcpu *vcpu)
 614 {
 615         u32 value;
 616
 617         if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
 618                 return kvm_s390_inject_program_int(vcpu,
 619                                                    PGM_PRIVILEGED_OPERATION);
 620
 621         if (vcpu->run->s.regs.gprs[0] & 0x00000000ffff0000)
 622                 return kvm_s390_inject_program_int(vcpu,
 623                                                    PGM_SPECIFICATION);
 624
 625         value = vcpu->run->s.regs.gprs[0] & 0x000000000000ffff;
 626         vcpu->arch.sie_block->todpr = value;
 627
 628         return 0;
 629 }
 630
 631 static const intercept_handler_t x01_handlers[256] = {
 632         [0x07] = handle_sckpf,
 633 };
 634
 635 int kvm_s390_handle_01(struct kvm_vcpu *vcpu)
 636 {
 637         intercept_handler_t handler;
 638
 639         handler = x01_handlers[vcpu->arch.sie_block->ipa & 0x00ff];
 640         if (handler)
 641                 return handler(vcpu);
 642         return -EOPNOTSUPP;
 643 }