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                 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
 274
 275         if (copy_from_guest(vcpu, &new_psw, addr, sizeof(new_psw)))
 276                 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
 277
 278         if (!(new_psw.mask & PSW32_MASK_BASE))
 279                 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
 280
 281         vcpu->arch.sie_block->gpsw.mask =
 282                 (new_psw.mask & ~PSW32_MASK_BASE) << 32;
 283         vcpu->arch.sie_block->gpsw.mask |= new_psw.addr & PSW32_ADDR_AMODE;
 284         vcpu->arch.sie_block->gpsw.addr = new_psw.addr & ~PSW32_ADDR_AMODE;
 285
 286         if ((vcpu->arch.sie_block->gpsw.mask & PSW_MASK_UNASSIGNED) ||
 287             (!(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_ADDR_MODE) &&
 288              (vcpu->arch.sie_block->gpsw.addr & ~PSW_ADDR_24)) ||
 289             ((vcpu->arch.sie_block->gpsw.mask & PSW_MASK_ADDR_MODE) ==
 290              PSW_MASK_EA))
 291                 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
 292
 293         handle_new_psw(vcpu);
 294         return 0;
 295 }
 296
 297 static int handle_lpswe(struct kvm_vcpu *vcpu)
 298 {
 299         u64 addr;
 300         psw_t new_psw;
 301
 302         addr = kvm_s390_get_base_disp_s(vcpu);
 303
 304         if (addr & 7)
 305                 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
 306
 307         if (copy_from_guest(vcpu, &new_psw, addr, sizeof(new_psw)))
 308                 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
 309
 310         vcpu->arch.sie_block->gpsw.mask = new_psw.mask;
 311         vcpu->arch.sie_block->gpsw.addr = new_psw.addr;
 312
 313         if ((vcpu->arch.sie_block->gpsw.mask & PSW_MASK_UNASSIGNED) ||
 314             (((vcpu->arch.sie_block->gpsw.mask & PSW_MASK_ADDR_MODE) ==
 315               PSW_MASK_BA) &&
 316              (vcpu->arch.sie_block->gpsw.addr & ~PSW_ADDR_31)) ||
 317             (!(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_ADDR_MODE) &&
 318              (vcpu->arch.sie_block->gpsw.addr & ~PSW_ADDR_24)) ||
 319             ((vcpu->arch.sie_block->gpsw.mask & PSW_MASK_ADDR_MODE) ==
 320              PSW_MASK_EA))
 321                 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
 322
 323         handle_new_psw(vcpu);
 324         return 0;
 325 }
 326
 327 static int handle_stidp(struct kvm_vcpu *vcpu)
 328 {
 329         u64 operand2;
 330         int rc;
 331
 332         vcpu->stat.instruction_stidp++;
 333
 334         operand2 = kvm_s390_get_base_disp_s(vcpu);
 335
 336         if (operand2 & 7) {
 337                 kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
 338                 goto out;
 339         }
 340
 341         rc = put_guest(vcpu, vcpu->arch.stidp_data, (u64 __user *)operand2);
 342         if (rc) {
 343                 kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
 344                 goto out;
 345         }
 346
 347         VCPU_EVENT(vcpu, 5, "%s", "store cpu id");
 348 out:
 349         return 0;
 350 }
 351
 352 static void handle_stsi_3_2_2(struct kvm_vcpu *vcpu, struct sysinfo_3_2_2 *mem)
 353 {
 354         struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
 355         int cpus = 0;
 356         int n;
 357
 358         spin_lock(&fi->lock);
 359         for (n = 0; n < KVM_MAX_VCPUS; n++)
 360                 if (fi->local_int[n])
 361                         cpus++;
 362         spin_unlock(&fi->lock);
 363
 364         /* deal with other level 3 hypervisors */
 365         if (stsi(mem, 3, 2, 2))
 366                 mem->count = 0;
 367         if (mem->count < 8)
 368                 mem->count++;
 369         for (n = mem->count - 1; n > 0 ; n--)
 370                 memcpy(&mem->vm[n], &mem->vm[n - 1], sizeof(mem->vm[0]));
 371
 372         mem->vm[0].cpus_total = cpus;
 373         mem->vm[0].cpus_configured = cpus;
 374         mem->vm[0].cpus_standby = 0;
 375         mem->vm[0].cpus_reserved = 0;
 376         mem->vm[0].caf = 1000;
 377         memcpy(mem->vm[0].name, "KVMguest", 8);
 378         ASCEBC(mem->vm[0].name, 8);
 379         memcpy(mem->vm[0].cpi, "KVM/Linux       ", 16);
 380         ASCEBC(mem->vm[0].cpi, 16);
 381 }
 382
 383 static int handle_stsi(struct kvm_vcpu *vcpu)
 384 {
 385         int fc = (vcpu->run->s.regs.gprs[0] & 0xf0000000) >> 28;
 386         int sel1 = vcpu->run->s.regs.gprs[0] & 0xff;
 387         int sel2 = vcpu->run->s.regs.gprs[1] & 0xffff;
 388         u64 operand2;
 389         unsigned long mem;
 390
 391         vcpu->stat.instruction_stsi++;
 392         VCPU_EVENT(vcpu, 4, "stsi: fc: %x sel1: %x sel2: %x", fc, sel1, sel2);
 393
 394         operand2 = kvm_s390_get_base_disp_s(vcpu);
 395
 396         if (operand2 & 0xfff && fc > 0)
 397                 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
 398
 399         switch (fc) {
 400         case 0:
 401                 vcpu->run->s.regs.gprs[0] = 3 << 28;
 402                 vcpu->arch.sie_block->gpsw.mask &= ~(3ul << 44);
 403                 return 0;
 404         case 1: /* same handling for 1 and 2 */
 405         case 2:
 406                 mem = get_zeroed_page(GFP_KERNEL);
 407                 if (!mem)
 408                         goto out_fail;
 409                 if (stsi((void *) mem, fc, sel1, sel2))
 410                         goto out_mem;
 411                 break;
 412         case 3:
 413                 if (sel1 != 2 || sel2 != 2)
 414                         goto out_fail;
 415                 mem = get_zeroed_page(GFP_KERNEL);
 416                 if (!mem)
 417                         goto out_fail;
 418                 handle_stsi_3_2_2(vcpu, (void *) mem);
 419                 break;
 420         default:
 421                 goto out_fail;
 422         }
 423
 424         if (copy_to_guest_absolute(vcpu, operand2, (void *) mem, PAGE_SIZE)) {
 425                 kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
 426                 goto out_mem;
 427         }
 428         trace_kvm_s390_handle_stsi(vcpu, fc, sel1, sel2, operand2);
 429         free_page(mem);
 430         vcpu->arch.sie_block->gpsw.mask &= ~(3ul << 44);
 431         vcpu->run->s.regs.gprs[0] = 0;
 432         return 0;
 433 out_mem:
 434         free_page(mem);
 435 out_fail:
 436         /* condition code 3 */
 437         vcpu->arch.sie_block->gpsw.mask |= 3ul << 44;
 438         return 0;
 439 }
 440
 441 static const intercept_handler_t b2_handlers[256] = {
 442         [0x02] = handle_stidp,
 443         [0x10] = handle_set_prefix,
 444         [0x11] = handle_store_prefix,
 445         [0x12] = handle_store_cpu_address,
 446         [0x29] = handle_skey,
 447         [0x2a] = handle_skey,
 448         [0x2b] = handle_skey,
 449         [0x30] = handle_io_inst,
 450         [0x31] = handle_io_inst,
 451         [0x32] = handle_io_inst,
 452         [0x33] = handle_io_inst,
 453         [0x34] = handle_io_inst,
 454         [0x35] = handle_io_inst,
 455         [0x36] = handle_io_inst,
 456         [0x37] = handle_io_inst,
 457         [0x38] = handle_io_inst,
 458         [0x39] = handle_io_inst,
 459         [0x3a] = handle_io_inst,
 460         [0x3b] = handle_io_inst,
 461         [0x3c] = handle_io_inst,
 462         [0x5f] = handle_io_inst,
 463         [0x74] = handle_io_inst,
 464         [0x76] = handle_io_inst,
 465         [0x7d] = handle_stsi,
 466         [0xb1] = handle_stfl,
 467         [0xb2] = handle_lpswe,
 468 };
 469
 470 int kvm_s390_handle_b2(struct kvm_vcpu *vcpu)
 471 {
 472         intercept_handler_t handler;
 473
 474         /*
 475          * a lot of B2 instructions are priviledged. We first check for
 476          * the privileged ones, that we can handle in the kernel. If the
 477          * kernel can handle this instruction, we check for the problem
 478          * state bit and (a) handle the instruction or (b) send a code 2
 479          * program check.
 480          * Anything else goes to userspace.*/
 481         handler = b2_handlers[vcpu->arch.sie_block->ipa & 0x00ff];
 482         if (handler) {
 483                 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
 484                         return kvm_s390_inject_program_int(vcpu,
 485                                                    PGM_PRIVILEGED_OPERATION);
 486                 else
 487                         return handler(vcpu);
 488         }
 489         return -EOPNOTSUPP;
 490 }
 491
 492 static int handle_epsw(struct kvm_vcpu *vcpu)
 493 {
 494         int reg1, reg2;
 495
 496         reg1 = (vcpu->arch.sie_block->ipb & 0x00f00000) >> 24;
 497         reg2 = (vcpu->arch.sie_block->ipb & 0x000f0000) >> 16;
 498
 499         /* This basically extracts the mask half of the psw. */
 500         vcpu->run->s.regs.gprs[reg1] &= 0xffffffff00000000;
 501         vcpu->run->s.regs.gprs[reg1] |= vcpu->arch.sie_block->gpsw.mask >> 32;
 502         if (reg2) {
 503                 vcpu->run->s.regs.gprs[reg2] &= 0xffffffff00000000;
 504                 vcpu->run->s.regs.gprs[reg2] |=
 505                         vcpu->arch.sie_block->gpsw.mask & 0x00000000ffffffff;
 506         }
 507         return 0;
 508 }
 509
 510 static const intercept_handler_t b9_handlers[256] = {
 511         [0x8d] = handle_epsw,
 512         [0x9c] = handle_io_inst,
 513 };
 514
 515 int kvm_s390_handle_b9(struct kvm_vcpu *vcpu)
 516 {
 517         intercept_handler_t handler;
 518
 519         /* This is handled just as for the B2 instructions. */
 520         handler = b9_handlers[vcpu->arch.sie_block->ipa & 0x00ff];
 521         if (handler) {
 522                 if ((handler != handle_epsw) &&
 523                     (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE))
 524                         return kvm_s390_inject_program_int(vcpu,
 525                                                    PGM_PRIVILEGED_OPERATION);
 526                 else
 527                         return handler(vcpu);
 528         }
 529         return -EOPNOTSUPP;
 530 }
 531
 532 static const intercept_handler_t eb_handlers[256] = {
 533         [0x8a] = handle_io_inst,
 534 };
 535
 536 int kvm_s390_handle_priv_eb(struct kvm_vcpu *vcpu)
 537 {
 538         intercept_handler_t handler;
 539
 540         /* All eb instructions that end up here are privileged. */
 541         if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
 542                 return kvm_s390_inject_program_int(vcpu,
 543                                                    PGM_PRIVILEGED_OPERATION);
 544         handler = eb_handlers[vcpu->arch.sie_block->ipb & 0xff];
 545         if (handler)
 546                 return handler(vcpu);
 547         return -EOPNOTSUPP;
 548 }
 549
 550 static int handle_tprot(struct kvm_vcpu *vcpu)
 551 {
 552         u64 address1, address2;
 553         struct vm_area_struct *vma;
 554         unsigned long user_address;
 555
 556         vcpu->stat.instruction_tprot++;
 557
 558         kvm_s390_get_base_disp_sse(vcpu, &address1, &address2);
 559
 560         /* we only handle the Linux memory detection case:
 561          * access key == 0
 562          * guest DAT == off
 563          * everything else goes to userspace. */
 564         if (address2 & 0xf0)
 565                 return -EOPNOTSUPP;
 566         if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_DAT)
 567                 return -EOPNOTSUPP;
 568
 569         down_read(&current->mm->mmap_sem);
 570         user_address = __gmap_translate(address1, vcpu->arch.gmap);
 571         if (IS_ERR_VALUE(user_address))
 572                 goto out_inject;
 573         vma = find_vma(current->mm, user_address);
 574         if (!vma)
 575                 goto out_inject;
 576         vcpu->arch.sie_block->gpsw.mask &= ~(3ul << 44);
 577         if (!(vma->vm_flags & VM_WRITE) && (vma->vm_flags & VM_READ))
 578                 vcpu->arch.sie_block->gpsw.mask |= (1ul << 44);
 579         if (!(vma->vm_flags & VM_WRITE) && !(vma->vm_flags & VM_READ))
 580                 vcpu->arch.sie_block->gpsw.mask |= (2ul << 44);
 581
 582         up_read(&current->mm->mmap_sem);
 583         return 0;
 584
 585 out_inject:
 586         up_read(&current->mm->mmap_sem);
 587         return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
 588 }
 589
 590 int kvm_s390_handle_e5(struct kvm_vcpu *vcpu)
 591 {
 592         /* For e5xx... instructions we only handle TPROT */
 593         if ((vcpu->arch.sie_block->ipa & 0x00ff) == 0x01)
 594                 return handle_tprot(vcpu);
 595         return -EOPNOTSUPP;
 596 }
 597
 598 static int handle_sckpf(struct kvm_vcpu *vcpu)
 599 {
 600         u32 value;
 601
 602         if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
 603                 return kvm_s390_inject_program_int(vcpu,
 604                                                    PGM_PRIVILEGED_OPERATION);
 605
 606         if (vcpu->run->s.regs.gprs[0] & 0x00000000ffff0000)
 607                 return kvm_s390_inject_program_int(vcpu,
 608                                                    PGM_SPECIFICATION);
 609
 610         value = vcpu->run->s.regs.gprs[0] & 0x000000000000ffff;
 611         vcpu->arch.sie_block->todpr = value;
 612
 613         return 0;
 614 }
 615
 616 static const intercept_handler_t x01_handlers[256] = {
 617         [0x07] = handle_sckpf,
 618 };
 619
 620 int kvm_s390_handle_01(struct kvm_vcpu *vcpu)
 621 {
 622         intercept_handler_t handler;
 623
 624         handler = x01_handlers[vcpu->arch.sie_block->ipa & 0x00ff];
 625         if (handler)
 626                 return handler(vcpu);
 627         return -EOPNOTSUPP;
 628 }