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                 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
  41
  42         /* get the value */
  43         if (get_guest(vcpu, address, (u32 __user *) operand2))
  44                 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
  45
  46         address = address & 0x7fffe000u;
  47
  48         /* make sure that the new value is valid memory */
  49         if (copy_from_guest_absolute(vcpu, &tmp, address, 1) ||
  50            (copy_from_guest_absolute(vcpu, &tmp, address + PAGE_SIZE, 1)))
  51                 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
  52
  53         kvm_s390_set_prefix(vcpu, address);
  54
  55         VCPU_EVENT(vcpu, 5, "setting prefix to %x", address);
  56         trace_kvm_s390_handle_prefix(vcpu, 1, address);
  57         return 0;
  58 }
  59
  60 static int handle_store_prefix(struct kvm_vcpu *vcpu)
  61 {
  62         u64 operand2;
  63         u32 address;
  64
  65         vcpu->stat.instruction_stpx++;
  66
  67         operand2 = kvm_s390_get_base_disp_s(vcpu);
  68
  69         /* must be word boundary */
  70         if (operand2 & 3)
  71                 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
  72
  73         address = vcpu->arch.sie_block->prefix;
  74         address = address & 0x7fffe000u;
  75
  76         /* get the value */
  77         if (put_guest(vcpu, address, (u32 __user *)operand2))
  78                 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
  79
  80         VCPU_EVENT(vcpu, 5, "storing prefix to %x", address);
  81         trace_kvm_s390_handle_prefix(vcpu, 0, address);
  82         return 0;
  83 }
  84
  85 static int handle_store_cpu_address(struct kvm_vcpu *vcpu)
  86 {
  87         u64 useraddr;
  88
  89         vcpu->stat.instruction_stap++;
  90
  91         useraddr = kvm_s390_get_base_disp_s(vcpu);
  92
  93         if (useraddr & 1)
  94                 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
  95
  96         if (put_guest(vcpu, vcpu->vcpu_id, (u16 __user *)useraddr))
  97                 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
  98
  99         VCPU_EVENT(vcpu, 5, "storing cpu address to %llx", useraddr);
 100         trace_kvm_s390_handle_stap(vcpu, useraddr);
 101         return 0;
 102 }
 103
 104 static int handle_skey(struct kvm_vcpu *vcpu)
 105 {
 106         vcpu->stat.instruction_storage_key++;
 107         vcpu->arch.sie_block->gpsw.addr -= 4;
 108         VCPU_EVENT(vcpu, 4, "%s", "retrying storage key operation");
 109         return 0;
 110 }
 111
 112 static int handle_tpi(struct kvm_vcpu *vcpu)
 113 {
 114         struct kvm_s390_interrupt_info *inti;
 115         u64 addr;
 116         int cc;
 117
 118         addr = kvm_s390_get_base_disp_s(vcpu);
 119         if (addr & 3)
 120                 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
 121         cc = 0;
 122         inti = kvm_s390_get_io_int(vcpu->kvm, vcpu->run->s.regs.crs[6], 0);
 123         if (!inti)
 124                 goto no_interrupt;
 125         cc = 1;
 126         if (addr) {
 127                 /*
 128                  * Store the two-word I/O interruption code into the
 129                  * provided area.
 130                  */
 131                 put_guest(vcpu, inti->io.subchannel_id, (u16 __user *) addr);
 132                 put_guest(vcpu, inti->io.subchannel_nr, (u16 __user *) (addr + 2));
 133                 put_guest(vcpu, inti->io.io_int_parm, (u32 __user *) (addr + 4));
 134         } else {
 135                 /*
 136                  * Store the three-word I/O interruption code into
 137                  * the appropriate lowcore area.
 138                  */
 139                 put_guest(vcpu, inti->io.subchannel_id, (u16 __user *) __LC_SUBCHANNEL_ID);
 140                 put_guest(vcpu, inti->io.subchannel_nr, (u16 __user *) __LC_SUBCHANNEL_NR);
 141                 put_guest(vcpu, inti->io.io_int_parm, (u32 __user *) __LC_IO_INT_PARM);
 142                 put_guest(vcpu, inti->io.io_int_word, (u32 __user *) __LC_IO_INT_WORD);
 143         }
 144         kfree(inti);
 145 no_interrupt:
 146         /* Set condition code and we're done. */
 147         vcpu->arch.sie_block->gpsw.mask &= ~(3ul << 44);
 148         vcpu->arch.sie_block->gpsw.mask |= (cc & 3ul) << 44;
 149         return 0;
 150 }
 151
 152 static int handle_tsch(struct kvm_vcpu *vcpu)
 153 {
 154         struct kvm_s390_interrupt_info *inti;
 155
 156         inti = kvm_s390_get_io_int(vcpu->kvm, 0,
 157                                    vcpu->run->s.regs.gprs[1]);
 158
 159         /*
 160          * Prepare exit to userspace.
 161          * We indicate whether we dequeued a pending I/O interrupt
 162          * so that userspace can re-inject it if the instruction gets
 163          * a program check. While this may re-order the pending I/O
 164          * interrupts, this is no problem since the priority is kept
 165          * intact.
 166          */
 167         vcpu->run->exit_reason = KVM_EXIT_S390_TSCH;
 168         vcpu->run->s390_tsch.dequeued = !!inti;
 169         if (inti) {
 170                 vcpu->run->s390_tsch.subchannel_id = inti->io.subchannel_id;
 171                 vcpu->run->s390_tsch.subchannel_nr = inti->io.subchannel_nr;
 172                 vcpu->run->s390_tsch.io_int_parm = inti->io.io_int_parm;
 173                 vcpu->run->s390_tsch.io_int_word = inti->io.io_int_word;
 174         }
 175         vcpu->run->s390_tsch.ipb = vcpu->arch.sie_block->ipb;
 176         kfree(inti);
 177         return -EREMOTE;
 178 }
 179
 180 static int handle_io_inst(struct kvm_vcpu *vcpu)
 181 {
 182         VCPU_EVENT(vcpu, 4, "%s", "I/O instruction");
 183
 184         if (vcpu->kvm->arch.css_support) {
 185                 /*
 186                  * Most I/O instructions will be handled by userspace.
 187                  * Exceptions are tpi and the interrupt portion of tsch.
 188                  */
 189                 if (vcpu->arch.sie_block->ipa == 0xb236)
 190                         return handle_tpi(vcpu);
 191                 if (vcpu->arch.sie_block->ipa == 0xb235)
 192                         return handle_tsch(vcpu);
 193                 /* Handle in userspace. */
 194                 return -EOPNOTSUPP;
 195         } else {
 196                 /*
 197                  * Set condition code 3 to stop the guest from issueing channel
 198                  * I/O instructions.
 199                  */
 200                 vcpu->arch.sie_block->gpsw.mask &= ~(3ul << 44);
 201                 vcpu->arch.sie_block->gpsw.mask |= (3 & 3ul) << 44;
 202                 return 0;
 203         }
 204 }
 205
 206 static int handle_stfl(struct kvm_vcpu *vcpu)
 207 {
 208         unsigned int facility_list;
 209         int rc;
 210
 211         vcpu->stat.instruction_stfl++;
 212         /* only pass the facility bits, which we can handle */
 213         facility_list = S390_lowcore.stfl_fac_list & 0xff00fff3;
 214
 215         rc = copy_to_guest(vcpu, offsetof(struct _lowcore, stfl_fac_list),
 216                            &facility_list, sizeof(facility_list));
 217         if (rc)
 218                 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
 219         VCPU_EVENT(vcpu, 5, "store facility list value %x", facility_list);
 220         trace_kvm_s390_handle_stfl(vcpu, facility_list);
 221         return 0;
 222 }
 223
 224 static void handle_new_psw(struct kvm_vcpu *vcpu)
 225 {
 226         /* Check whether the new psw is enabled for machine checks. */
 227         if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_MCHECK)
 228                 kvm_s390_deliver_pending_machine_checks(vcpu);
 229 }
 230
 231 #define PSW_MASK_ADDR_MODE (PSW_MASK_EA | PSW_MASK_BA)
 232 #define PSW_MASK_UNASSIGNED 0xb80800fe7fffffffUL
 233 #define PSW_ADDR_24 0x0000000000ffffffUL
 234 #define PSW_ADDR_31 0x000000007fffffffUL
 235
 236 static int is_valid_psw(psw_t *psw) {
 237         if (psw->mask & PSW_MASK_UNASSIGNED)
 238                 return 0;
 239         if ((psw->mask & PSW_MASK_ADDR_MODE) == PSW_MASK_BA) {
 240                 if (psw->addr & ~PSW_ADDR_31)
 241                         return 0;
 242         }
 243         if (!(psw->mask & PSW_MASK_ADDR_MODE) && (psw->addr & ~PSW_ADDR_24))
 244                 return 0;
 245         if ((psw->mask & PSW_MASK_ADDR_MODE) ==  PSW_MASK_EA)
 246                 return 0;
 247         return 1;
 248 }
 249
 250 int kvm_s390_handle_lpsw(struct kvm_vcpu *vcpu)
 251 {
 252         psw_t *gpsw = &vcpu->arch.sie_block->gpsw;
 253         psw_compat_t new_psw;
 254         u64 addr;
 255
 256         if (gpsw->mask & PSW_MASK_PSTATE)
 257                 return kvm_s390_inject_program_int(vcpu,
 258                                                    PGM_PRIVILEGED_OPERATION);
 259         addr = kvm_s390_get_base_disp_s(vcpu);
 260         if (addr & 7)
 261                 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
 262         if (copy_from_guest(vcpu, &new_psw, addr, sizeof(new_psw)))
 263                 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
 264         if (!(new_psw.mask & PSW32_MASK_BASE))
 265                 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
 266         gpsw->mask = (new_psw.mask & ~PSW32_MASK_BASE) << 32;
 267         gpsw->mask |= new_psw.addr & PSW32_ADDR_AMODE;
 268         gpsw->addr = new_psw.addr & ~PSW32_ADDR_AMODE;
 269         if (!is_valid_psw(gpsw))
 270                 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
 271         handle_new_psw(vcpu);
 272         return 0;
 273 }
 274
 275 static int handle_lpswe(struct kvm_vcpu *vcpu)
 276 {
 277         psw_t new_psw;
 278         u64 addr;
 279
 280         addr = kvm_s390_get_base_disp_s(vcpu);
 281         if (addr & 7)
 282                 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
 283         if (copy_from_guest(vcpu, &new_psw, addr, sizeof(new_psw)))
 284                 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
 285         vcpu->arch.sie_block->gpsw = new_psw;
 286         if (!is_valid_psw(&vcpu->arch.sie_block->gpsw))
 287                 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
 288         handle_new_psw(vcpu);
 289         return 0;
 290 }
 291
 292 static int handle_stidp(struct kvm_vcpu *vcpu)
 293 {
 294         u64 operand2;
 295
 296         vcpu->stat.instruction_stidp++;
 297
 298         operand2 = kvm_s390_get_base_disp_s(vcpu);
 299
 300         if (operand2 & 7)
 301                 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
 302
 303         if (put_guest(vcpu, vcpu->arch.stidp_data, (u64 __user *)operand2))
 304                 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
 305
 306         VCPU_EVENT(vcpu, 5, "%s", "store cpu id");
 307         return 0;
 308 }
 309
 310 static void handle_stsi_3_2_2(struct kvm_vcpu *vcpu, struct sysinfo_3_2_2 *mem)
 311 {
 312         struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
 313         int cpus = 0;
 314         int n;
 315
 316         spin_lock(&fi->lock);
 317         for (n = 0; n < KVM_MAX_VCPUS; n++)
 318                 if (fi->local_int[n])
 319                         cpus++;
 320         spin_unlock(&fi->lock);
 321
 322         /* deal with other level 3 hypervisors */
 323         if (stsi(mem, 3, 2, 2))
 324                 mem->count = 0;
 325         if (mem->count < 8)
 326                 mem->count++;
 327         for (n = mem->count - 1; n > 0 ; n--)
 328                 memcpy(&mem->vm[n], &mem->vm[n - 1], sizeof(mem->vm[0]));
 329
 330         mem->vm[0].cpus_total = cpus;
 331         mem->vm[0].cpus_configured = cpus;
 332         mem->vm[0].cpus_standby = 0;
 333         mem->vm[0].cpus_reserved = 0;
 334         mem->vm[0].caf = 1000;
 335         memcpy(mem->vm[0].name, "KVMguest", 8);
 336         ASCEBC(mem->vm[0].name, 8);
 337         memcpy(mem->vm[0].cpi, "KVM/Linux       ", 16);
 338         ASCEBC(mem->vm[0].cpi, 16);
 339 }
 340
 341 static int handle_stsi(struct kvm_vcpu *vcpu)
 342 {
 343         int fc = (vcpu->run->s.regs.gprs[0] & 0xf0000000) >> 28;
 344         int sel1 = vcpu->run->s.regs.gprs[0] & 0xff;
 345         int sel2 = vcpu->run->s.regs.gprs[1] & 0xffff;
 346         u64 operand2;
 347         unsigned long mem;
 348         int rc = 0;
 349
 350         vcpu->stat.instruction_stsi++;
 351         VCPU_EVENT(vcpu, 4, "stsi: fc: %x sel1: %x sel2: %x", fc, sel1, sel2);
 352
 353         operand2 = kvm_s390_get_base_disp_s(vcpu);
 354
 355         if (operand2 & 0xfff && fc > 0)
 356                 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
 357
 358         switch (fc) {
 359         case 0:
 360                 vcpu->run->s.regs.gprs[0] = 3 << 28;
 361                 vcpu->arch.sie_block->gpsw.mask &= ~(3ul << 44);
 362                 return 0;
 363         case 1: /* same handling for 1 and 2 */
 364         case 2:
 365                 mem = get_zeroed_page(GFP_KERNEL);
 366                 if (!mem)
 367                         goto out_fail;
 368                 if (stsi((void *) mem, fc, sel1, sel2))
 369                         goto out_mem;
 370                 break;
 371         case 3:
 372                 if (sel1 != 2 || sel2 != 2)
 373                         goto out_fail;
 374                 mem = get_zeroed_page(GFP_KERNEL);
 375                 if (!mem)
 376                         goto out_fail;
 377                 handle_stsi_3_2_2(vcpu, (void *) mem);
 378                 break;
 379         default:
 380                 goto out_fail;
 381         }
 382
 383         if (copy_to_guest_absolute(vcpu, operand2, (void *) mem, PAGE_SIZE)) {
 384                 rc = kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
 385                 goto out_mem;
 386         }
 387         trace_kvm_s390_handle_stsi(vcpu, fc, sel1, sel2, operand2);
 388         free_page(mem);
 389         vcpu->arch.sie_block->gpsw.mask &= ~(3ul << 44);
 390         vcpu->run->s.regs.gprs[0] = 0;
 391         return 0;
 392 out_mem:
 393         free_page(mem);
 394 out_fail:
 395         /* condition code 3 */
 396         vcpu->arch.sie_block->gpsw.mask |= 3ul << 44;
 397         return rc;
 398 }
 399
 400 static const intercept_handler_t b2_handlers[256] = {
 401         [0x02] = handle_stidp,
 402         [0x10] = handle_set_prefix,
 403         [0x11] = handle_store_prefix,
 404         [0x12] = handle_store_cpu_address,
 405         [0x29] = handle_skey,
 406         [0x2a] = handle_skey,
 407         [0x2b] = handle_skey,
 408         [0x30] = handle_io_inst,
 409         [0x31] = handle_io_inst,
 410         [0x32] = handle_io_inst,
 411         [0x33] = handle_io_inst,
 412         [0x34] = handle_io_inst,
 413         [0x35] = handle_io_inst,
 414         [0x36] = handle_io_inst,
 415         [0x37] = handle_io_inst,
 416         [0x38] = handle_io_inst,
 417         [0x39] = handle_io_inst,
 418         [0x3a] = handle_io_inst,
 419         [0x3b] = handle_io_inst,
 420         [0x3c] = handle_io_inst,
 421         [0x5f] = handle_io_inst,
 422         [0x74] = handle_io_inst,
 423         [0x76] = handle_io_inst,
 424         [0x7d] = handle_stsi,
 425         [0xb1] = handle_stfl,
 426         [0xb2] = handle_lpswe,
 427 };
 428
 429 int kvm_s390_handle_b2(struct kvm_vcpu *vcpu)
 430 {
 431         intercept_handler_t handler;
 432
 433         /*
 434          * a lot of B2 instructions are priviledged. We first check for
 435          * the privileged ones, that we can handle in the kernel. If the
 436          * kernel can handle this instruction, we check for the problem
 437          * state bit and (a) handle the instruction or (b) send a code 2
 438          * program check.
 439          * Anything else goes to userspace.*/
 440         handler = b2_handlers[vcpu->arch.sie_block->ipa & 0x00ff];
 441         if (handler) {
 442                 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
 443                         return kvm_s390_inject_program_int(vcpu,
 444                                                    PGM_PRIVILEGED_OPERATION);
 445                 else
 446                         return handler(vcpu);
 447         }
 448         return -EOPNOTSUPP;
 449 }
 450
 451 static int handle_epsw(struct kvm_vcpu *vcpu)
 452 {
 453         int reg1, reg2;
 454
 455         reg1 = (vcpu->arch.sie_block->ipb & 0x00f00000) >> 24;
 456         reg2 = (vcpu->arch.sie_block->ipb & 0x000f0000) >> 16;
 457
 458         /* This basically extracts the mask half of the psw. */
 459         vcpu->run->s.regs.gprs[reg1] &= 0xffffffff00000000;
 460         vcpu->run->s.regs.gprs[reg1] |= vcpu->arch.sie_block->gpsw.mask >> 32;
 461         if (reg2) {
 462                 vcpu->run->s.regs.gprs[reg2] &= 0xffffffff00000000;
 463                 vcpu->run->s.regs.gprs[reg2] |=
 464                         vcpu->arch.sie_block->gpsw.mask & 0x00000000ffffffff;
 465         }
 466         return 0;
 467 }
 468
 469 static const intercept_handler_t b9_handlers[256] = {
 470         [0x8d] = handle_epsw,
 471         [0x9c] = handle_io_inst,
 472 };
 473
 474 int kvm_s390_handle_b9(struct kvm_vcpu *vcpu)
 475 {
 476         intercept_handler_t handler;
 477
 478         /* This is handled just as for the B2 instructions. */
 479         handler = b9_handlers[vcpu->arch.sie_block->ipa & 0x00ff];
 480         if (handler) {
 481                 if ((handler != handle_epsw) &&
 482                     (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE))
 483                         return kvm_s390_inject_program_int(vcpu,
 484                                                    PGM_PRIVILEGED_OPERATION);
 485                 else
 486                         return handler(vcpu);
 487         }
 488         return -EOPNOTSUPP;
 489 }
 490
 491 static const intercept_handler_t eb_handlers[256] = {
 492         [0x8a] = handle_io_inst,
 493 };
 494
 495 int kvm_s390_handle_priv_eb(struct kvm_vcpu *vcpu)
 496 {
 497         intercept_handler_t handler;
 498
 499         /* All eb instructions that end up here are privileged. */
 500         if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
 501                 return kvm_s390_inject_program_int(vcpu,
 502                                                    PGM_PRIVILEGED_OPERATION);
 503         handler = eb_handlers[vcpu->arch.sie_block->ipb & 0xff];
 504         if (handler)
 505                 return handler(vcpu);
 506         return -EOPNOTSUPP;
 507 }
 508
 509 static int handle_tprot(struct kvm_vcpu *vcpu)
 510 {
 511         u64 address1, address2;
 512         struct vm_area_struct *vma;
 513         unsigned long user_address;
 514
 515         vcpu->stat.instruction_tprot++;
 516
 517         kvm_s390_get_base_disp_sse(vcpu, &address1, &address2);
 518
 519         /* we only handle the Linux memory detection case:
 520          * access key == 0
 521          * guest DAT == off
 522          * everything else goes to userspace. */
 523         if (address2 & 0xf0)
 524                 return -EOPNOTSUPP;
 525         if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_DAT)
 526                 return -EOPNOTSUPP;
 527
 528         down_read(&current->mm->mmap_sem);
 529         user_address = __gmap_translate(address1, vcpu->arch.gmap);
 530         if (IS_ERR_VALUE(user_address))
 531                 goto out_inject;
 532         vma = find_vma(current->mm, user_address);
 533         if (!vma)
 534                 goto out_inject;
 535         vcpu->arch.sie_block->gpsw.mask &= ~(3ul << 44);
 536         if (!(vma->vm_flags & VM_WRITE) && (vma->vm_flags & VM_READ))
 537                 vcpu->arch.sie_block->gpsw.mask |= (1ul << 44);
 538         if (!(vma->vm_flags & VM_WRITE) && !(vma->vm_flags & VM_READ))
 539                 vcpu->arch.sie_block->gpsw.mask |= (2ul << 44);
 540
 541         up_read(&current->mm->mmap_sem);
 542         return 0;
 543
 544 out_inject:
 545         up_read(&current->mm->mmap_sem);
 546         return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
 547 }
 548
 549 int kvm_s390_handle_e5(struct kvm_vcpu *vcpu)
 550 {
 551         /* For e5xx... instructions we only handle TPROT */
 552         if ((vcpu->arch.sie_block->ipa & 0x00ff) == 0x01)
 553                 return handle_tprot(vcpu);
 554         return -EOPNOTSUPP;
 555 }
 556
 557 static int handle_sckpf(struct kvm_vcpu *vcpu)
 558 {
 559         u32 value;
 560
 561         if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
 562                 return kvm_s390_inject_program_int(vcpu,
 563                                                    PGM_PRIVILEGED_OPERATION);
 564
 565         if (vcpu->run->s.regs.gprs[0] & 0x00000000ffff0000)
 566                 return kvm_s390_inject_program_int(vcpu,
 567                                                    PGM_SPECIFICATION);
 568
 569         value = vcpu->run->s.regs.gprs[0] & 0x000000000000ffff;
 570         vcpu->arch.sie_block->todpr = value;
 571
 572         return 0;
 573 }
 574
 575 static const intercept_handler_t x01_handlers[256] = {
 576         [0x07] = handle_sckpf,
 577 };
 578
 579 int kvm_s390_handle_01(struct kvm_vcpu *vcpu)
 580 {
 581         intercept_handler_t handler;
 582
 583         handler = x01_handlers[vcpu->arch.sie_block->ipa & 0x00ff];
 584         if (handler)
 585                 return handler(vcpu);
 586         return -EOPNOTSUPP;
 587 }