target-s390x/kvm.c

   1 /*
   2  * QEMU S390x KVM implementation
   3  *
   4  * Copyright (c) 2009 Alexander Graf <agraf@suse.de>
   5  * Copyright IBM Corp. 2012
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * Contributions after 2012-10-29 are licensed under the terms of the
  18  * GNU GPL, version 2 or (at your option) any later version.
  19  *
  20  * You should have received a copy of the GNU (Lesser) General Public
  21  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  22  */
  23
  24 #include <sys/types.h>
  25 #include <sys/ioctl.h>
  26 #include <sys/mman.h>
  27
  28 #include <linux/kvm.h>
  29 #include <asm/ptrace.h>
  30
  31 #include "qemu-common.h"
  32 #include "qemu/timer.h"
  33 #include "sysemu/sysemu.h"
  34 #include "sysemu/kvm.h"
  35 #include "hw/hw.h"
  36 #include "cpu.h"
  37 #include "sysemu/device_tree.h"
  38 #include "qapi/qmp/qjson.h"
  39 #include "monitor/monitor.h"
  40 #include "exec/gdbstub.h"
  41 #include "trace.h"
  42 #include "qapi-event.h"
  43 #include "hw/s390x/s390-pci-inst.h"
  44
  45 /* #define DEBUG_KVM */
  46
  47 #ifdef DEBUG_KVM
  48 #define DPRINTF(fmt, ...) \
  49     do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0)
  50 #else
  51 #define DPRINTF(fmt, ...) \
  52     do { } while (0)
  53 #endif
  54
  55 #define IPA0_DIAG                       0x8300
  56 #define IPA0_SIGP                       0xae00
  57 #define IPA0_B2                         0xb200
  58 #define IPA0_B9                         0xb900
  59 #define IPA0_EB                         0xeb00
  60 #define IPA0_E3                         0xe300
  61
  62 #define PRIV_B2_SCLP_CALL               0x20
  63 #define PRIV_B2_CSCH                    0x30
  64 #define PRIV_B2_HSCH                    0x31
  65 #define PRIV_B2_MSCH                    0x32
  66 #define PRIV_B2_SSCH                    0x33
  67 #define PRIV_B2_STSCH                   0x34
  68 #define PRIV_B2_TSCH                    0x35
  69 #define PRIV_B2_TPI                     0x36
  70 #define PRIV_B2_SAL                     0x37
  71 #define PRIV_B2_RSCH                    0x38
  72 #define PRIV_B2_STCRW                   0x39
  73 #define PRIV_B2_STCPS                   0x3a
  74 #define PRIV_B2_RCHP                    0x3b
  75 #define PRIV_B2_SCHM                    0x3c
  76 #define PRIV_B2_CHSC                    0x5f
  77 #define PRIV_B2_SIGA                    0x74
  78 #define PRIV_B2_XSCH                    0x76
  79
  80 #define PRIV_EB_SQBS                    0x8a
  81 #define PRIV_EB_PCISTB                  0xd0
  82 #define PRIV_EB_SIC                     0xd1
  83
  84 #define PRIV_B9_EQBS                    0x9c
  85 #define PRIV_B9_CLP                     0xa0
  86 #define PRIV_B9_PCISTG                  0xd0
  87 #define PRIV_B9_PCILG                   0xd2
  88 #define PRIV_B9_RPCIT                   0xd3
  89
  90 #define PRIV_E3_MPCIFC                  0xd0
  91 #define PRIV_E3_STPCIFC                 0xd4
  92
  93 #define DIAG_IPL                        0x308
  94 #define DIAG_KVM_HYPERCALL              0x500
  95 #define DIAG_KVM_BREAKPOINT             0x501
  96
  97 #define ICPT_INSTRUCTION                0x04
  98 #define ICPT_PROGRAM                    0x08
  99 #define ICPT_EXT_INT                    0x14
 100 #define ICPT_WAITPSW                    0x1c
 101 #define ICPT_SOFT_INTERCEPT             0x24
 102 #define ICPT_CPU_STOP                   0x28
 103 #define ICPT_IO                         0x40
 104
 105 static CPUWatchpoint hw_watchpoint;
 106 /*
 107  * We don't use a list because this structure is also used to transmit the
 108  * hardware breakpoints to the kernel.
 109  */
 110 static struct kvm_hw_breakpoint *hw_breakpoints;
 111 static int nb_hw_breakpoints;
 112
 113 const KVMCapabilityInfo kvm_arch_required_capabilities[] = {
 114     KVM_CAP_LAST_INFO
 115 };
 116
 117 static int cap_sync_regs;
 118 static int cap_async_pf;
 119
 120 static void *legacy_s390_alloc(size_t size, uint64_t *align);
 121
 122 static int kvm_s390_check_clear_cmma(KVMState *s)
 123 {
 124     struct kvm_device_attr attr = {
 125         .group = KVM_S390_VM_MEM_CTRL,
 126         .attr = KVM_S390_VM_MEM_CLR_CMMA,
 127     };
 128
 129     return kvm_vm_ioctl(s, KVM_HAS_DEVICE_ATTR, &attr);
 130 }
 131
 132 static int kvm_s390_check_enable_cmma(KVMState *s)
 133 {
 134     struct kvm_device_attr attr = {
 135         .group = KVM_S390_VM_MEM_CTRL,
 136         .attr = KVM_S390_VM_MEM_ENABLE_CMMA,
 137     };
 138
 139     return kvm_vm_ioctl(s, KVM_HAS_DEVICE_ATTR, &attr);
 140 }
 141
 142 void kvm_s390_clear_cmma_callback(void *opaque)
 143 {
 144     int rc;
 145     KVMState *s = opaque;
 146     struct kvm_device_attr attr = {
 147         .group = KVM_S390_VM_MEM_CTRL,
 148         .attr = KVM_S390_VM_MEM_CLR_CMMA,
 149     };
 150
 151     rc = kvm_vm_ioctl(s, KVM_SET_DEVICE_ATTR, &attr);
 152     trace_kvm_clear_cmma(rc);
 153 }
 154
 155 static void kvm_s390_enable_cmma(KVMState *s)
 156 {
 157     int rc;
 158     struct kvm_device_attr attr = {
 159         .group = KVM_S390_VM_MEM_CTRL,
 160         .attr = KVM_S390_VM_MEM_ENABLE_CMMA,
 161     };
 162
 163     if (kvm_s390_check_enable_cmma(s) || kvm_s390_check_clear_cmma(s)) {
 164         return;
 165     }
 166
 167     rc = kvm_vm_ioctl(s, KVM_SET_DEVICE_ATTR, &attr);
 168     if (!rc) {
 169         qemu_register_reset(kvm_s390_clear_cmma_callback, s);
 170     }
 171     trace_kvm_enable_cmma(rc);
 172 }
 173
 174 int kvm_arch_init(KVMState *s)
 175 {
 176     cap_sync_regs = kvm_check_extension(s, KVM_CAP_SYNC_REGS);
 177     cap_async_pf = kvm_check_extension(s, KVM_CAP_ASYNC_PF);
 178
 179     if (kvm_check_extension(s, KVM_CAP_VM_ATTRIBUTES)) {
 180         kvm_s390_enable_cmma(s);
 181     }
 182
 183     if (!kvm_check_extension(s, KVM_CAP_S390_GMAP)
 184         || !kvm_check_extension(s, KVM_CAP_S390_COW)) {
 185         phys_mem_set_alloc(legacy_s390_alloc);
 186     }
 187     return 0;
 188 }
 189
 190 unsigned long kvm_arch_vcpu_id(CPUState *cpu)
 191 {
 192     return cpu->cpu_index;
 193 }
 194
 195 int kvm_arch_init_vcpu(CPUState *cs)
 196 {
 197     S390CPU *cpu = S390_CPU(cs);
 198     kvm_s390_set_cpu_state(cpu, cpu->env.cpu_state);
 199     return 0;
 200 }
 201
 202 void kvm_s390_reset_vcpu(S390CPU *cpu)
 203 {
 204     CPUState *cs = CPU(cpu);
 205
 206     /* The initial reset call is needed here to reset in-kernel
 207      * vcpu data that we can't access directly from QEMU
 208      * (i.e. with older kernels which don't support sync_regs/ONE_REG).
 209      * Before this ioctl cpu_synchronize_state() is called in common kvm
 210      * code (kvm-all) */
 211     if (kvm_vcpu_ioctl(cs, KVM_S390_INITIAL_RESET, NULL)) {
 212         error_report("Initial CPU reset failed on CPU %i\n", cs->cpu_index);
 213     }
 214 }
 215
 216 static int can_sync_regs(CPUState *cs, int regs)
 217 {
 218     return cap_sync_regs && (cs->kvm_run->kvm_valid_regs & regs) == regs;
 219 }
 220
 221 int kvm_arch_put_registers(CPUState *cs, int level)
 222 {
 223     S390CPU *cpu = S390_CPU(cs);
 224     CPUS390XState *env = &cpu->env;
 225     struct kvm_sregs sregs;
 226     struct kvm_regs regs;
 227     struct kvm_fpu fpu = {};
 228     int r;
 229     int i;
 230
 231     /* always save the PSW  and the GPRS*/
 232     cs->kvm_run->psw_addr = env->psw.addr;
 233     cs->kvm_run->psw_mask = env->psw.mask;
 234
 235     if (can_sync_regs(cs, KVM_SYNC_GPRS)) {
 236         for (i = 0; i < 16; i++) {
 237             cs->kvm_run->s.regs.gprs[i] = env->regs[i];
 238             cs->kvm_run->kvm_dirty_regs |= KVM_SYNC_GPRS;
 239         }
 240     } else {
 241         for (i = 0; i < 16; i++) {
 242             regs.gprs[i] = env->regs[i];
 243         }
 244         r = kvm_vcpu_ioctl(cs, KVM_SET_REGS, &regs);
 245         if (r < 0) {
 246             return r;
 247         }
 248     }
 249
 250     /* Floating point */
 251     for (i = 0; i < 16; i++) {
 252         fpu.fprs[i] = env->fregs[i].ll;
 253     }
 254     fpu.fpc = env->fpc;
 255
 256     r = kvm_vcpu_ioctl(cs, KVM_SET_FPU, &fpu);
 257     if (r < 0) {
 258         return r;
 259     }
 260
 261     /* Do we need to save more than that? */
 262     if (level == KVM_PUT_RUNTIME_STATE) {
 263         return 0;
 264     }
 265
 266     if (can_sync_regs(cs, KVM_SYNC_ARCH0)) {
 267         cs->kvm_run->s.regs.cputm = env->cputm;
 268         cs->kvm_run->s.regs.ckc = env->ckc;
 269         cs->kvm_run->s.regs.todpr = env->todpr;
 270         cs->kvm_run->s.regs.gbea = env->gbea;
 271         cs->kvm_run->s.regs.pp = env->pp;
 272         cs->kvm_run->kvm_dirty_regs |= KVM_SYNC_ARCH0;
 273     } else {
 274         /*
 275          * These ONE_REGS are not protected by a capability. As they are only
 276          * necessary for migration we just trace a possible error, but don't
 277          * return with an error return code.
 278          */
 279         kvm_set_one_reg(cs, KVM_REG_S390_CPU_TIMER, &env->cputm);
 280         kvm_set_one_reg(cs, KVM_REG_S390_CLOCK_COMP, &env->ckc);
 281         kvm_set_one_reg(cs, KVM_REG_S390_TODPR, &env->todpr);
 282         kvm_set_one_reg(cs, KVM_REG_S390_GBEA, &env->gbea);
 283         kvm_set_one_reg(cs, KVM_REG_S390_PP, &env->pp);
 284     }
 285
 286     /* pfault parameters */
 287     if (can_sync_regs(cs, KVM_SYNC_PFAULT)) {
 288         cs->kvm_run->s.regs.pft = env->pfault_token;
 289         cs->kvm_run->s.regs.pfs = env->pfault_select;
 290         cs->kvm_run->s.regs.pfc = env->pfault_compare;
 291         cs->kvm_run->kvm_dirty_regs |= KVM_SYNC_PFAULT;
 292     } else if (cap_async_pf) {
 293         r = kvm_set_one_reg(cs, KVM_REG_S390_PFTOKEN, &env->pfault_token);
 294         if (r < 0) {
 295             return r;
 296         }
 297         r = kvm_set_one_reg(cs, KVM_REG_S390_PFCOMPARE, &env->pfault_compare);
 298         if (r < 0) {
 299             return r;
 300         }
 301         r = kvm_set_one_reg(cs, KVM_REG_S390_PFSELECT, &env->pfault_select);
 302         if (r < 0) {
 303             return r;
 304         }
 305     }
 306
 307     /* access registers and control registers*/
 308     if (can_sync_regs(cs, KVM_SYNC_ACRS | KVM_SYNC_CRS)) {
 309         for (i = 0; i < 16; i++) {
 310             cs->kvm_run->s.regs.acrs[i] = env->aregs[i];
 311             cs->kvm_run->s.regs.crs[i] = env->cregs[i];
 312         }
 313         cs->kvm_run->kvm_dirty_regs |= KVM_SYNC_ACRS;
 314         cs->kvm_run->kvm_dirty_regs |= KVM_SYNC_CRS;
 315     } else {
 316         for (i = 0; i < 16; i++) {
 317             sregs.acrs[i] = env->aregs[i];
 318             sregs.crs[i] = env->cregs[i];
 319         }
 320         r = kvm_vcpu_ioctl(cs, KVM_SET_SREGS, &sregs);
 321         if (r < 0) {
 322             return r;
 323         }
 324     }
 325
 326     /* Finally the prefix */
 327     if (can_sync_regs(cs, KVM_SYNC_PREFIX)) {
 328         cs->kvm_run->s.regs.prefix = env->psa;
 329         cs->kvm_run->kvm_dirty_regs |= KVM_SYNC_PREFIX;
 330     } else {
 331         /* prefix is only supported via sync regs */
 332     }
 333     return 0;
 334 }
 335
 336 int kvm_arch_get_registers(CPUState *cs)
 337 {
 338     S390CPU *cpu = S390_CPU(cs);
 339     CPUS390XState *env = &cpu->env;
 340     struct kvm_sregs sregs;
 341     struct kvm_regs regs;
 342     struct kvm_fpu fpu;
 343     int i, r;
 344
 345     /* get the PSW */
 346     env->psw.addr = cs->kvm_run->psw_addr;
 347     env->psw.mask = cs->kvm_run->psw_mask;
 348
 349     /* the GPRS */
 350     if (can_sync_regs(cs, KVM_SYNC_GPRS)) {
 351         for (i = 0; i < 16; i++) {
 352             env->regs[i] = cs->kvm_run->s.regs.gprs[i];
 353         }
 354     } else {
 355         r = kvm_vcpu_ioctl(cs, KVM_GET_REGS, &regs);
 356         if (r < 0) {
 357             return r;
 358         }
 359          for (i = 0; i < 16; i++) {
 360             env->regs[i] = regs.gprs[i];
 361         }
 362     }
 363
 364     /* The ACRS and CRS */
 365     if (can_sync_regs(cs, KVM_SYNC_ACRS | KVM_SYNC_CRS)) {
 366         for (i = 0; i < 16; i++) {
 367             env->aregs[i] = cs->kvm_run->s.regs.acrs[i];
 368             env->cregs[i] = cs->kvm_run->s.regs.crs[i];
 369         }
 370     } else {
 371         r = kvm_vcpu_ioctl(cs, KVM_GET_SREGS, &sregs);
 372         if (r < 0) {
 373             return r;
 374         }
 375          for (i = 0; i < 16; i++) {
 376             env->aregs[i] = sregs.acrs[i];
 377             env->cregs[i] = sregs.crs[i];
 378         }
 379     }
 380
 381     /* Floating point */
 382     r = kvm_vcpu_ioctl(cs, KVM_GET_FPU, &fpu);
 383     if (r < 0) {
 384         return r;
 385     }
 386     for (i = 0; i < 16; i++) {
 387         env->fregs[i].ll = fpu.fprs[i];
 388     }
 389     env->fpc = fpu.fpc;
 390
 391     /* The prefix */
 392     if (can_sync_regs(cs, KVM_SYNC_PREFIX)) {
 393         env->psa = cs->kvm_run->s.regs.prefix;
 394     }
 395
 396     if (can_sync_regs(cs, KVM_SYNC_ARCH0)) {
 397         env->cputm = cs->kvm_run->s.regs.cputm;
 398         env->ckc = cs->kvm_run->s.regs.ckc;
 399         env->todpr = cs->kvm_run->s.regs.todpr;
 400         env->gbea = cs->kvm_run->s.regs.gbea;
 401         env->pp = cs->kvm_run->s.regs.pp;
 402     } else {
 403         /*
 404          * These ONE_REGS are not protected by a capability. As they are only
 405          * necessary for migration we just trace a possible error, but don't
 406          * return with an error return code.
 407          */
 408         kvm_get_one_reg(cs, KVM_REG_S390_CPU_TIMER, &env->cputm);
 409         kvm_get_one_reg(cs, KVM_REG_S390_CLOCK_COMP, &env->ckc);
 410         kvm_get_one_reg(cs, KVM_REG_S390_TODPR, &env->todpr);
 411         kvm_get_one_reg(cs, KVM_REG_S390_GBEA, &env->gbea);
 412         kvm_get_one_reg(cs, KVM_REG_S390_PP, &env->pp);
 413     }
 414
 415     /* pfault parameters */
 416     if (can_sync_regs(cs, KVM_SYNC_PFAULT)) {
 417         env->pfault_token = cs->kvm_run->s.regs.pft;
 418         env->pfault_select = cs->kvm_run->s.regs.pfs;
 419         env->pfault_compare = cs->kvm_run->s.regs.pfc;
 420     } else if (cap_async_pf) {
 421         r = kvm_get_one_reg(cs, KVM_REG_S390_PFTOKEN, &env->pfault_token);
 422         if (r < 0) {
 423             return r;
 424         }
 425         r = kvm_get_one_reg(cs, KVM_REG_S390_PFCOMPARE, &env->pfault_compare);
 426         if (r < 0) {
 427             return r;
 428         }
 429         r = kvm_get_one_reg(cs, KVM_REG_S390_PFSELECT, &env->pfault_select);
 430         if (r < 0) {
 431             return r;
 432         }
 433     }
 434
 435     return 0;
 436 }
 437
 438 /*
 439  * Legacy layout for s390:
 440  * Older S390 KVM requires the topmost vma of the RAM to be
 441  * smaller than an system defined value, which is at least 256GB.
 442  * Larger systems have larger values. We put the guest between
 443  * the end of data segment (system break) and this value. We
 444  * use 32GB as a base to have enough room for the system break
 445  * to grow. We also have to use MAP parameters that avoid
 446  * read-only mapping of guest pages.
 447  */
 448 static void *legacy_s390_alloc(size_t size, uint64_t *align)
 449 {
 450     void *mem;
 451
 452     mem = mmap((void *) 0x800000000ULL, size,
 453                PROT_EXEC|PROT_READ|PROT_WRITE,
 454                MAP_SHARED | MAP_ANONYMOUS | MAP_FIXED, -1, 0);
 455     return mem == MAP_FAILED ? NULL : mem;
 456 }
 457
 458 /* DIAG 501 is used for sw breakpoints */
 459 static const uint8_t diag_501[] = {0x83, 0x24, 0x05, 0x01};
 460
 461 int kvm_arch_insert_sw_breakpoint(CPUState *cs, struct kvm_sw_breakpoint *bp)
 462 {
 463
 464     if (cpu_memory_rw_debug(cs, bp->pc, (uint8_t *)&bp->saved_insn,
 465                             sizeof(diag_501), 0) ||
 466         cpu_memory_rw_debug(cs, bp->pc, (uint8_t *)diag_501,
 467                             sizeof(diag_501), 1)) {
 468         return -EINVAL;
 469     }
 470     return 0;
 471 }
 472
 473 int kvm_arch_remove_sw_breakpoint(CPUState *cs, struct kvm_sw_breakpoint *bp)
 474 {
 475     uint8_t t[sizeof(diag_501)];
 476
 477     if (cpu_memory_rw_debug(cs, bp->pc, t, sizeof(diag_501), 0)) {
 478         return -EINVAL;
 479     } else if (memcmp(t, diag_501, sizeof(diag_501))) {
 480         return -EINVAL;
 481     } else if (cpu_memory_rw_debug(cs, bp->pc, (uint8_t *)&bp->saved_insn,
 482                                    sizeof(diag_501), 1)) {
 483         return -EINVAL;
 484     }
 485
 486     return 0;
 487 }
 488
 489 static struct kvm_hw_breakpoint *find_hw_breakpoint(target_ulong addr,
 490                                                     int len, int type)
 491 {
 492     int n;
 493
 494     for (n = 0; n < nb_hw_breakpoints; n++) {
 495         if (hw_breakpoints[n].addr == addr && hw_breakpoints[n].type == type &&
 496             (hw_breakpoints[n].len == len || len == -1)) {
 497             return &hw_breakpoints[n];
 498         }
 499     }
 500
 501     return NULL;
 502 }
 503
 504 static int insert_hw_breakpoint(target_ulong addr, int len, int type)
 505 {
 506     int size;
 507
 508     if (find_hw_breakpoint(addr, len, type)) {
 509         return -EEXIST;
 510     }
 511
 512     size = (nb_hw_breakpoints + 1) * sizeof(struct kvm_hw_breakpoint);
 513
 514     if (!hw_breakpoints) {
 515         nb_hw_breakpoints = 0;
 516         hw_breakpoints = (struct kvm_hw_breakpoint *)g_try_malloc(size);
 517     } else {
 518         hw_breakpoints =
 519             (struct kvm_hw_breakpoint *)g_try_realloc(hw_breakpoints, size);
 520     }
 521
 522     if (!hw_breakpoints) {
 523         nb_hw_breakpoints = 0;
 524         return -ENOMEM;
 525     }
 526
 527     hw_breakpoints[nb_hw_breakpoints].addr = addr;
 528     hw_breakpoints[nb_hw_breakpoints].len = len;
 529     hw_breakpoints[nb_hw_breakpoints].type = type;
 530
 531     nb_hw_breakpoints++;
 532
 533     return 0;
 534 }
 535
 536 int kvm_arch_insert_hw_breakpoint(target_ulong addr,
 537                                   target_ulong len, int type)
 538 {
 539     switch (type) {
 540     case GDB_BREAKPOINT_HW:
 541         type = KVM_HW_BP;
 542         break;
 543     case GDB_WATCHPOINT_WRITE:
 544         if (len < 1) {
 545             return -EINVAL;
 546         }
 547         type = KVM_HW_WP_WRITE;
 548         break;
 549     default:
 550         return -ENOSYS;
 551     }
 552     return insert_hw_breakpoint(addr, len, type);
 553 }
 554
 555 int kvm_arch_remove_hw_breakpoint(target_ulong addr,
 556                                   target_ulong len, int type)
 557 {
 558     int size;
 559     struct kvm_hw_breakpoint *bp = find_hw_breakpoint(addr, len, type);
 560
 561     if (bp == NULL) {
 562         return -ENOENT;
 563     }
 564
 565     nb_hw_breakpoints--;
 566     if (nb_hw_breakpoints > 0) {
 567         /*
 568          * In order to trim the array, move the last element to the position to
 569          * be removed - if necessary.
 570          */
 571         if (bp != &hw_breakpoints[nb_hw_breakpoints]) {
 572             *bp = hw_breakpoints[nb_hw_breakpoints];
 573         }
 574         size = nb_hw_breakpoints * sizeof(struct kvm_hw_breakpoint);
 575         hw_breakpoints =
 576              (struct kvm_hw_breakpoint *)g_realloc(hw_breakpoints, size);
 577     } else {
 578         g_free(hw_breakpoints);
 579         hw_breakpoints = NULL;
 580     }
 581
 582     return 0;
 583 }
 584
 585 void kvm_arch_remove_all_hw_breakpoints(void)
 586 {
 587     nb_hw_breakpoints = 0;
 588     g_free(hw_breakpoints);
 589     hw_breakpoints = NULL;
 590 }
 591
 592 void kvm_arch_update_guest_debug(CPUState *cpu, struct kvm_guest_debug *dbg)
 593 {
 594     int i;
 595
 596     if (nb_hw_breakpoints > 0) {
 597         dbg->arch.nr_hw_bp = nb_hw_breakpoints;
 598         dbg->arch.hw_bp = hw_breakpoints;
 599
 600         for (i = 0; i < nb_hw_breakpoints; ++i) {
 601             hw_breakpoints[i].phys_addr = s390_cpu_get_phys_addr_debug(cpu,
 602                                                        hw_breakpoints[i].addr);
 603         }
 604         dbg->control |= KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_HW_BP;
 605     } else {
 606         dbg->arch.nr_hw_bp = 0;
 607         dbg->arch.hw_bp = NULL;
 608     }
 609 }
 610
 611 void kvm_arch_pre_run(CPUState *cpu, struct kvm_run *run)
 612 {
 613 }
 614
 615 void kvm_arch_post_run(CPUState *cpu, struct kvm_run *run)
 616 {
 617 }
 618
 619 int kvm_arch_process_async_events(CPUState *cs)
 620 {
 621     return cs->halted;
 622 }
 623
 624 static int s390_kvm_irq_to_interrupt(struct kvm_s390_irq *irq,
 625                                      struct kvm_s390_interrupt *interrupt)
 626 {
 627     int r = 0;
 628
 629     interrupt->type = irq->type;
 630     switch (irq->type) {
 631     case KVM_S390_INT_VIRTIO:
 632         interrupt->parm = irq->u.ext.ext_params;
 633         /* fall through */
 634     case KVM_S390_INT_PFAULT_INIT:
 635     case KVM_S390_INT_PFAULT_DONE:
 636         interrupt->parm64 = irq->u.ext.ext_params2;
 637         break;
 638     case KVM_S390_PROGRAM_INT:
 639         interrupt->parm = irq->u.pgm.code;
 640         break;
 641     case KVM_S390_SIGP_SET_PREFIX:
 642         interrupt->parm = irq->u.prefix.address;
 643         break;
 644     case KVM_S390_INT_SERVICE:
 645         interrupt->parm = irq->u.ext.ext_params;
 646         break;
 647     case KVM_S390_MCHK:
 648         interrupt->parm = irq->u.mchk.cr14;
 649         interrupt->parm64 = irq->u.mchk.mcic;
 650         break;
 651     case KVM_S390_INT_EXTERNAL_CALL:
 652         interrupt->parm = irq->u.extcall.code;
 653         break;
 654     case KVM_S390_INT_EMERGENCY:
 655         interrupt->parm = irq->u.emerg.code;
 656         break;
 657     case KVM_S390_SIGP_STOP:
 658     case KVM_S390_RESTART:
 659         break; /* These types have no parameters */
 660     case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
 661         interrupt->parm = irq->u.io.subchannel_id << 16;
 662         interrupt->parm |= irq->u.io.subchannel_nr;
 663         interrupt->parm64 = (uint64_t)irq->u.io.io_int_parm << 32;
 664         interrupt->parm64 |= irq->u.io.io_int_word;
 665         break;
 666     default:
 667         r = -EINVAL;
 668         break;
 669     }
 670     return r;
 671 }
 672
 673 void kvm_s390_vcpu_interrupt(S390CPU *cpu, struct kvm_s390_irq *irq)
 674 {
 675     struct kvm_s390_interrupt kvmint = {};
 676     CPUState *cs = CPU(cpu);
 677     int r;
 678
 679     r = s390_kvm_irq_to_interrupt(irq, &kvmint);
 680     if (r < 0) {
 681         fprintf(stderr, "%s called with bogus interrupt\n", __func__);
 682         exit(1);
 683     }
 684
 685     r = kvm_vcpu_ioctl(cs, KVM_S390_INTERRUPT, &kvmint);
 686     if (r < 0) {
 687         fprintf(stderr, "KVM failed to inject interrupt\n");
 688         exit(1);
 689     }
 690 }
 691
 692 static void __kvm_s390_floating_interrupt(struct kvm_s390_irq *irq)
 693 {
 694     struct kvm_s390_interrupt kvmint = {};
 695     int r;
 696
 697     r = s390_kvm_irq_to_interrupt(irq, &kvmint);
 698     if (r < 0) {
 699         fprintf(stderr, "%s called with bogus interrupt\n", __func__);
 700         exit(1);
 701     }
 702
 703     r = kvm_vm_ioctl(kvm_state, KVM_S390_INTERRUPT, &kvmint);
 704     if (r < 0) {
 705         fprintf(stderr, "KVM failed to inject interrupt\n");
 706         exit(1);
 707     }
 708 }
 709
 710 void kvm_s390_floating_interrupt(struct kvm_s390_irq *irq)
 711 {
 712     static bool use_flic = true;
 713     int r;
 714
 715     if (use_flic) {
 716         r = kvm_s390_inject_flic(irq);
 717         if (r == -ENOSYS) {
 718             use_flic = false;
 719         }
 720         if (!r) {
 721             return;
 722         }
 723     }
 724     __kvm_s390_floating_interrupt(irq);
 725 }
 726
 727 void kvm_s390_virtio_irq(int config_change, uint64_t token)
 728 {
 729     struct kvm_s390_irq irq = {
 730         .type = KVM_S390_INT_VIRTIO,
 731         .u.ext.ext_params = config_change,
 732         .u.ext.ext_params2 = token,
 733     };
 734
 735     kvm_s390_floating_interrupt(&irq);
 736 }
 737
 738 void kvm_s390_service_interrupt(uint32_t parm)
 739 {
 740     struct kvm_s390_irq irq = {
 741         .type = KVM_S390_INT_SERVICE,
 742         .u.ext.ext_params = parm,
 743     };
 744
 745     kvm_s390_floating_interrupt(&irq);
 746 }
 747
 748 static void enter_pgmcheck(S390CPU *cpu, uint16_t code)
 749 {
 750     struct kvm_s390_irq irq = {
 751         .type = KVM_S390_PROGRAM_INT,
 752         .u.pgm.code = code,
 753     };
 754
 755     kvm_s390_vcpu_interrupt(cpu, &irq);
 756 }
 757
 758 static int kvm_sclp_service_call(S390CPU *cpu, struct kvm_run *run,
 759                                  uint16_t ipbh0)
 760 {
 761     CPUS390XState *env = &cpu->env;
 762     uint64_t sccb;
 763     uint32_t code;
 764     int r = 0;
 765
 766     cpu_synchronize_state(CPU(cpu));
 767     sccb = env->regs[ipbh0 & 0xf];
 768     code = env->regs[(ipbh0 & 0xf0) >> 4];
 769
 770     r = sclp_service_call(env, sccb, code);
 771     if (r < 0) {
 772         enter_pgmcheck(cpu, -r);
 773     } else {
 774         setcc(cpu, r);
 775     }
 776
 777     return 0;
 778 }
 779
 780 static int handle_b2(S390CPU *cpu, struct kvm_run *run, uint8_t ipa1)
 781 {
 782     CPUS390XState *env = &cpu->env;
 783     int rc = 0;
 784     uint16_t ipbh0 = (run->s390_sieic.ipb & 0xffff0000) >> 16;
 785
 786     cpu_synchronize_state(CPU(cpu));
 787
 788     switch (ipa1) {
 789     case PRIV_B2_XSCH:
 790         ioinst_handle_xsch(cpu, env->regs[1]);
 791         break;
 792     case PRIV_B2_CSCH:
 793         ioinst_handle_csch(cpu, env->regs[1]);
 794         break;
 795     case PRIV_B2_HSCH:
 796         ioinst_handle_hsch(cpu, env->regs[1]);
 797         break;
 798     case PRIV_B2_MSCH:
 799         ioinst_handle_msch(cpu, env->regs[1], run->s390_sieic.ipb);
 800         break;
 801     case PRIV_B2_SSCH:
 802         ioinst_handle_ssch(cpu, env->regs[1], run->s390_sieic.ipb);
 803         break;
 804     case PRIV_B2_STCRW:
 805         ioinst_handle_stcrw(cpu, run->s390_sieic.ipb);
 806         break;
 807     case PRIV_B2_STSCH:
 808         ioinst_handle_stsch(cpu, env->regs[1], run->s390_sieic.ipb);
 809         break;
 810     case PRIV_B2_TSCH:
 811         /* We should only get tsch via KVM_EXIT_S390_TSCH. */
 812         fprintf(stderr, "Spurious tsch intercept\n");
 813         break;
 814     case PRIV_B2_CHSC:
 815         ioinst_handle_chsc(cpu, run->s390_sieic.ipb);
 816         break;
 817     case PRIV_B2_TPI:
 818         /* This should have been handled by kvm already. */
 819         fprintf(stderr, "Spurious tpi intercept\n");
 820         break;
 821     case PRIV_B2_SCHM:
 822         ioinst_handle_schm(cpu, env->regs[1], env->regs[2],
 823                            run->s390_sieic.ipb);
 824         break;
 825     case PRIV_B2_RSCH:
 826         ioinst_handle_rsch(cpu, env->regs[1]);
 827         break;
 828     case PRIV_B2_RCHP:
 829         ioinst_handle_rchp(cpu, env->regs[1]);
 830         break;
 831     case PRIV_B2_STCPS:
 832         /* We do not provide this instruction, it is suppressed. */
 833         break;
 834     case PRIV_B2_SAL:
 835         ioinst_handle_sal(cpu, env->regs[1]);
 836         break;
 837     case PRIV_B2_SIGA:
 838         /* Not provided, set CC = 3 for subchannel not operational */
 839         setcc(cpu, 3);
 840         break;
 841     case PRIV_B2_SCLP_CALL:
 842         rc = kvm_sclp_service_call(cpu, run, ipbh0);
 843         break;
 844     default:
 845         rc = -1;
 846         DPRINTF("KVM: unhandled PRIV: 0xb2%x\n", ipa1);
 847         break;
 848     }
 849
 850     return rc;
 851 }
 852
 853 static uint64_t get_base_disp_rxy(S390CPU *cpu, struct kvm_run *run)
 854 {
 855     CPUS390XState *env = &cpu->env;
 856     uint32_t x2 = (run->s390_sieic.ipa & 0x000f);
 857     uint32_t base2 = run->s390_sieic.ipb >> 28;
 858     uint32_t disp2 = ((run->s390_sieic.ipb & 0x0fff0000) >> 16) +
 859                      ((run->s390_sieic.ipb & 0xff00) << 4);
 860
 861     if (disp2 & 0x80000) {
 862         disp2 += 0xfff00000;
 863     }
 864
 865     return (base2 ? env->regs[base2] : 0) +
 866            (x2 ? env->regs[x2] : 0) + (long)(int)disp2;
 867 }
 868
 869 static uint64_t get_base_disp_rsy(S390CPU *cpu, struct kvm_run *run)
 870 {
 871     CPUS390XState *env = &cpu->env;
 872     uint32_t base2 = run->s390_sieic.ipb >> 28;
 873     uint32_t disp2 = ((run->s390_sieic.ipb & 0x0fff0000) >> 16) +
 874                      ((run->s390_sieic.ipb & 0xff00) << 4);
 875
 876     if (disp2 & 0x80000) {
 877         disp2 += 0xfff00000;
 878     }
 879
 880     return (base2 ? env->regs[base2] : 0) + (long)(int)disp2;
 881 }
 882
 883 static int kvm_clp_service_call(S390CPU *cpu, struct kvm_run *run)
 884 {
 885     uint8_t r2 = (run->s390_sieic.ipb & 0x000f0000) >> 16;
 886
 887     return clp_service_call(cpu, r2);
 888 }
 889
 890 static int kvm_pcilg_service_call(S390CPU *cpu, struct kvm_run *run)
 891 {
 892     uint8_t r1 = (run->s390_sieic.ipb & 0x00f00000) >> 20;
 893     uint8_t r2 = (run->s390_sieic.ipb & 0x000f0000) >> 16;
 894
 895     return pcilg_service_call(cpu, r1, r2);
 896 }
 897
 898 static int kvm_pcistg_service_call(S390CPU *cpu, struct kvm_run *run)
 899 {
 900     uint8_t r1 = (run->s390_sieic.ipb & 0x00f00000) >> 20;
 901     uint8_t r2 = (run->s390_sieic.ipb & 0x000f0000) >> 16;
 902
 903     return pcistg_service_call(cpu, r1, r2);
 904 }
 905
 906 static int kvm_stpcifc_service_call(S390CPU *cpu, struct kvm_run *run)
 907 {
 908     uint8_t r1 = (run->s390_sieic.ipa & 0x00f0) >> 4;
 909     uint64_t fiba;
 910
 911     cpu_synchronize_state(CPU(cpu));
 912     fiba = get_base_disp_rxy(cpu, run);
 913
 914     return stpcifc_service_call(cpu, r1, fiba);
 915 }
 916
 917 static int kvm_sic_service_call(S390CPU *cpu, struct kvm_run *run)
 918 {
 919     /* NOOP */
 920     return 0;
 921 }
 922
 923 static int kvm_rpcit_service_call(S390CPU *cpu, struct kvm_run *run)
 924 {
 925     uint8_t r1 = (run->s390_sieic.ipb & 0x00f00000) >> 20;
 926     uint8_t r2 = (run->s390_sieic.ipb & 0x000f0000) >> 16;
 927
 928     return rpcit_service_call(cpu, r1, r2);
 929 }
 930
 931 static int kvm_pcistb_service_call(S390CPU *cpu, struct kvm_run *run)
 932 {
 933     uint8_t r1 = (run->s390_sieic.ipa & 0x00f0) >> 4;
 934     uint8_t r3 = run->s390_sieic.ipa & 0x000f;
 935     uint64_t gaddr;
 936
 937     cpu_synchronize_state(CPU(cpu));
 938     gaddr = get_base_disp_rsy(cpu, run);
 939
 940     return pcistb_service_call(cpu, r1, r3, gaddr);
 941 }
 942
 943 static int kvm_mpcifc_service_call(S390CPU *cpu, struct kvm_run *run)
 944 {
 945     uint8_t r1 = (run->s390_sieic.ipa & 0x00f0) >> 4;
 946     uint64_t fiba;
 947
 948     cpu_synchronize_state(CPU(cpu));
 949     fiba = get_base_disp_rxy(cpu, run);
 950
 951     return mpcifc_service_call(cpu, r1, fiba);
 952 }
 953
 954 static int handle_b9(S390CPU *cpu, struct kvm_run *run, uint8_t ipa1)
 955 {
 956     int r = 0;
 957
 958     switch (ipa1) {
 959     case PRIV_B9_CLP:
 960         r = kvm_clp_service_call(cpu, run);
 961         break;
 962     case PRIV_B9_PCISTG:
 963         r = kvm_pcistg_service_call(cpu, run);
 964         break;
 965     case PRIV_B9_PCILG:
 966         r = kvm_pcilg_service_call(cpu, run);
 967         break;
 968     case PRIV_B9_RPCIT:
 969         r = kvm_rpcit_service_call(cpu, run);
 970         break;
 971     case PRIV_B9_EQBS:
 972         /* just inject exception */
 973         r = -1;
 974         break;
 975     default:
 976         r = -1;
 977         DPRINTF("KVM: unhandled PRIV: 0xb9%x\n", ipa1);
 978         break;
 979     }
 980
 981     return r;
 982 }
 983
 984 static int handle_eb(S390CPU *cpu, struct kvm_run *run, uint8_t ipbl)
 985 {
 986     int r = 0;
 987
 988     switch (ipbl) {
 989     case PRIV_EB_PCISTB:
 990         r = kvm_pcistb_service_call(cpu, run);
 991         break;
 992     case PRIV_EB_SIC:
 993         r = kvm_sic_service_call(cpu, run);
 994         break;
 995     case PRIV_EB_SQBS:
 996         /* just inject exception */
 997         r = -1;
 998         break;
 999     default:
1000         r = -1;
1001         DPRINTF("KVM: unhandled PRIV: 0xeb%x\n", ipbl);
1002         break;
1003     }
1004
1005     return r;
1006 }
1007
1008 static int handle_e3(S390CPU *cpu, struct kvm_run *run, uint8_t ipbl)
1009 {
1010     int r = 0;
1011
1012     switch (ipbl) {
1013     case PRIV_E3_MPCIFC:
1014         r = kvm_mpcifc_service_call(cpu, run);
1015         break;
1016     case PRIV_E3_STPCIFC:
1017         r = kvm_stpcifc_service_call(cpu, run);
1018         break;
1019     default:
1020         r = -1;
1021         DPRINTF("KVM: unhandled PRIV: 0xe3%x\n", ipbl);
1022         break;
1023     }
1024
1025     return r;
1026 }
1027
1028 static int handle_hypercall(S390CPU *cpu, struct kvm_run *run)
1029 {
1030     CPUS390XState *env = &cpu->env;
1031     int ret;
1032
1033     cpu_synchronize_state(CPU(cpu));
1034     ret = s390_virtio_hypercall(env);
1035     if (ret == -EINVAL) {
1036         enter_pgmcheck(cpu, PGM_SPECIFICATION);
1037         return 0;
1038     }
1039
1040     return ret;
1041 }
1042
1043 static void kvm_handle_diag_308(S390CPU *cpu, struct kvm_run *run)
1044 {
1045     uint64_t r1, r3;
1046
1047     cpu_synchronize_state(CPU(cpu));
1048     r1 = (run->s390_sieic.ipa & 0x00f0) >> 8;
1049     r3 = run->s390_sieic.ipa & 0x000f;
1050     handle_diag_308(&cpu->env, r1, r3);
1051 }
1052
1053 static int handle_sw_breakpoint(S390CPU *cpu, struct kvm_run *run)
1054 {
1055     CPUS390XState *env = &cpu->env;
1056     unsigned long pc;
1057
1058     cpu_synchronize_state(CPU(cpu));
1059
1060     pc = env->psw.addr - 4;
1061     if (kvm_find_sw_breakpoint(CPU(cpu), pc)) {
1062         env->psw.addr = pc;
1063         return EXCP_DEBUG;
1064     }
1065
1066     return -ENOENT;
1067 }
1068
1069 #define DIAG_KVM_CODE_MASK 0x000000000000ffff
1070
1071 static int handle_diag(S390CPU *cpu, struct kvm_run *run, uint32_t ipb)
1072 {
1073     int r = 0;
1074     uint16_t func_code;
1075
1076     /*
1077      * For any diagnose call we support, bits 48-63 of the resulting
1078      * address specify the function code; the remainder is ignored.
1079      */
1080     func_code = decode_basedisp_rs(&cpu->env, ipb) & DIAG_KVM_CODE_MASK;
1081     switch (func_code) {
1082     case DIAG_IPL:
1083         kvm_handle_diag_308(cpu, run);
1084         break;
1085     case DIAG_KVM_HYPERCALL:
1086         r = handle_hypercall(cpu, run);
1087         break;
1088     case DIAG_KVM_BREAKPOINT:
1089         r = handle_sw_breakpoint(cpu, run);
1090         break;
1091     default:
1092         DPRINTF("KVM: unknown DIAG: 0x%x\n", func_code);
1093         r = -1;
1094         break;
1095     }
1096
1097     return r;
1098 }
1099
1100 static void sigp_cpu_start(void *arg)
1101 {
1102     CPUState *cs = arg;
1103     S390CPU *cpu = S390_CPU(cs);
1104
1105     s390_cpu_set_state(CPU_STATE_OPERATING, cpu);
1106     DPRINTF("DONE: KVM cpu start: %p\n", &cpu->env);
1107 }
1108
1109 static void sigp_cpu_restart(void *arg)
1110 {
1111     CPUState *cs = arg;
1112     S390CPU *cpu = S390_CPU(cs);
1113     struct kvm_s390_irq irq = {
1114         .type = KVM_S390_RESTART,
1115     };
1116
1117     kvm_s390_vcpu_interrupt(cpu, &irq);
1118     s390_cpu_set_state(CPU_STATE_OPERATING, cpu);
1119 }
1120
1121 int kvm_s390_cpu_restart(S390CPU *cpu)
1122 {
1123     run_on_cpu(CPU(cpu), sigp_cpu_restart, CPU(cpu));
1124     DPRINTF("DONE: KVM cpu restart: %p\n", &cpu->env);
1125     return 0;
1126 }
1127
1128 static void sigp_initial_cpu_reset(void *arg)
1129 {
1130     CPUState *cpu = arg;
1131     S390CPUClass *scc = S390_CPU_GET_CLASS(cpu);
1132
1133     cpu_synchronize_state(cpu);
1134     scc->initial_cpu_reset(cpu);
1135     cpu_synchronize_post_reset(cpu);
1136 }
1137
1138 static void sigp_cpu_reset(void *arg)
1139 {
1140     CPUState *cpu = arg;
1141     S390CPUClass *scc = S390_CPU_GET_CLASS(cpu);
1142
1143     cpu_synchronize_state(cpu);
1144     scc->cpu_reset(cpu);
1145     cpu_synchronize_post_reset(cpu);
1146 }
1147
1148 #define SIGP_ORDER_MASK 0x000000ff
1149
1150 static int handle_sigp(S390CPU *cpu, struct kvm_run *run, uint8_t ipa1)
1151 {
1152     CPUS390XState *env = &cpu->env;
1153     uint8_t order_code;
1154     uint16_t cpu_addr;
1155     S390CPU *target_cpu;
1156     uint64_t *statusreg = &env->regs[ipa1 >> 4];
1157     int cc;
1158
1159     cpu_synchronize_state(CPU(cpu));
1160
1161     /* get order code */
1162     order_code = decode_basedisp_rs(env, run->s390_sieic.ipb) & SIGP_ORDER_MASK;
1163
1164     cpu_addr = env->regs[ipa1 & 0x0f];
1165     target_cpu = s390_cpu_addr2state(cpu_addr);
1166     if (target_cpu == NULL) {
1167         cc = 3;    /* not operational */
1168         goto out;
1169     }
1170
1171     switch (order_code) {
1172     case SIGP_START:
1173         run_on_cpu(CPU(target_cpu), sigp_cpu_start, CPU(target_cpu));
1174         cc = 0;
1175         break;
1176     case SIGP_RESTART:
1177         run_on_cpu(CPU(target_cpu), sigp_cpu_restart, CPU(target_cpu));
1178         cc = 0;
1179         break;
1180     case SIGP_SET_ARCH:
1181         *statusreg &= 0xffffffff00000000UL;
1182         *statusreg |= SIGP_STAT_INVALID_PARAMETER;
1183         cc = 1;   /* status stored */
1184         break;
1185     case SIGP_INITIAL_CPU_RESET:
1186         run_on_cpu(CPU(target_cpu), sigp_initial_cpu_reset, CPU(target_cpu));
1187         cc = 0;
1188         break;
1189     case SIGP_CPU_RESET:
1190         run_on_cpu(CPU(target_cpu), sigp_cpu_reset, CPU(target_cpu));
1191         cc = 0;
1192         break;
1193     default:
1194         DPRINTF("KVM: unknown SIGP: 0x%x\n", order_code);
1195         *statusreg &= 0xffffffff00000000UL;
1196         *statusreg |= SIGP_STAT_INVALID_ORDER;
1197         cc = 1;   /* status stored */
1198         break;
1199     }
1200
1201 out:
1202     setcc(cpu, cc);
1203     return 0;
1204 }
1205
1206 static int handle_instruction(S390CPU *cpu, struct kvm_run *run)
1207 {
1208     unsigned int ipa0 = (run->s390_sieic.ipa & 0xff00);
1209     uint8_t ipa1 = run->s390_sieic.ipa & 0x00ff;
1210     int r = -1;
1211
1212     DPRINTF("handle_instruction 0x%x 0x%x\n",
1213             run->s390_sieic.ipa, run->s390_sieic.ipb);
1214     switch (ipa0) {
1215     case IPA0_B2:
1216         r = handle_b2(cpu, run, ipa1);
1217         break;
1218     case IPA0_B9:
1219         r = handle_b9(cpu, run, ipa1);
1220         break;
1221     case IPA0_EB:
1222         r = handle_eb(cpu, run, run->s390_sieic.ipb & 0xff);
1223         break;
1224     case IPA0_E3:
1225         r = handle_e3(cpu, run, run->s390_sieic.ipb & 0xff);
1226         break;
1227     case IPA0_DIAG:
1228         r = handle_diag(cpu, run, run->s390_sieic.ipb);
1229         break;
1230     case IPA0_SIGP:
1231         r = handle_sigp(cpu, run, ipa1);
1232         break;
1233     }
1234
1235     if (r < 0) {
1236         r = 0;
1237         enter_pgmcheck(cpu, 0x0001);
1238     }
1239
1240     return r;
1241 }
1242
1243 static bool is_special_wait_psw(CPUState *cs)
1244 {
1245     /* signal quiesce */
1246     return cs->kvm_run->psw_addr == 0xfffUL;
1247 }
1248
1249 static void guest_panicked(void)
1250 {
1251     qapi_event_send_guest_panicked(GUEST_PANIC_ACTION_PAUSE,
1252                                    &error_abort);
1253     vm_stop(RUN_STATE_GUEST_PANICKED);
1254 }
1255
1256 static void unmanageable_intercept(S390CPU *cpu, const char *str, int pswoffset)
1257 {
1258     CPUState *cs = CPU(cpu);
1259
1260     error_report("Unmanageable %s! CPU%i new PSW: 0x%016lx:%016lx",
1261                  str, cs->cpu_index, ldq_phys(cs->as, cpu->env.psa + pswoffset),
1262                  ldq_phys(cs->as, cpu->env.psa + pswoffset + 8));
1263     s390_cpu_halt(cpu);
1264     guest_panicked();
1265 }
1266
1267 static int handle_intercept(S390CPU *cpu)
1268 {
1269     CPUState *cs = CPU(cpu);
1270     struct kvm_run *run = cs->kvm_run;
1271     int icpt_code = run->s390_sieic.icptcode;
1272     int r = 0;
1273
1274     DPRINTF("intercept: 0x%x (at 0x%lx)\n", icpt_code,
1275             (long)cs->kvm_run->psw_addr);
1276     switch (icpt_code) {
1277         case ICPT_INSTRUCTION:
1278             r = handle_instruction(cpu, run);
1279             break;
1280         case ICPT_PROGRAM:
1281             unmanageable_intercept(cpu, "program interrupt",
1282                                    offsetof(LowCore, program_new_psw));
1283             r = EXCP_HALTED;
1284             break;
1285         case ICPT_EXT_INT:
1286             unmanageable_intercept(cpu, "external interrupt",
1287                                    offsetof(LowCore, external_new_psw));
1288             r = EXCP_HALTED;
1289             break;
1290         case ICPT_WAITPSW:
1291             /* disabled wait, since enabled wait is handled in kernel */
1292             cpu_synchronize_state(cs);
1293             if (s390_cpu_halt(cpu) == 0) {
1294                 if (is_special_wait_psw(cs)) {
1295                     qemu_system_shutdown_request();
1296                 } else {
1297                     guest_panicked();
1298                 }
1299             }
1300             r = EXCP_HALTED;
1301             break;
1302         case ICPT_CPU_STOP:
1303             if (s390_cpu_set_state(CPU_STATE_STOPPED, cpu) == 0) {
1304                 qemu_system_shutdown_request();
1305             }
1306             r = EXCP_HALTED;
1307             break;
1308         case ICPT_SOFT_INTERCEPT:
1309             fprintf(stderr, "KVM unimplemented icpt SOFT\n");
1310             exit(1);
1311             break;
1312         case ICPT_IO:
1313             fprintf(stderr, "KVM unimplemented icpt IO\n");
1314             exit(1);
1315             break;
1316         default:
1317             fprintf(stderr, "Unknown intercept code: %d\n", icpt_code);
1318             exit(1);
1319             break;
1320     }
1321
1322     return r;
1323 }
1324
1325 static int handle_tsch(S390CPU *cpu)
1326 {
1327     CPUS390XState *env = &cpu->env;
1328     CPUState *cs = CPU(cpu);
1329     struct kvm_run *run = cs->kvm_run;
1330     int ret;
1331
1332     cpu_synchronize_state(cs);
1333
1334     ret = ioinst_handle_tsch(env, env->regs[1], run->s390_tsch.ipb);
1335     if (ret >= 0) {
1336         /* Success; set condition code. */
1337         setcc(cpu, ret);
1338         ret = 0;
1339     } else if (ret < -1) {
1340         /*
1341          * Failure.
1342          * If an I/O interrupt had been dequeued, we have to reinject it.
1343          */
1344         if (run->s390_tsch.dequeued) {
1345             kvm_s390_io_interrupt(run->s390_tsch.subchannel_id,
1346                                   run->s390_tsch.subchannel_nr,
1347                                   run->s390_tsch.io_int_parm,
1348                                   run->s390_tsch.io_int_word);
1349         }
1350         ret = 0;
1351     }
1352     return ret;
1353 }
1354
1355 static int kvm_arch_handle_debug_exit(S390CPU *cpu)
1356 {
1357     CPUState *cs = CPU(cpu);
1358     struct kvm_run *run = cs->kvm_run;
1359
1360     int ret = 0;
1361     struct kvm_debug_exit_arch *arch_info = &run->debug.arch;
1362
1363     switch (arch_info->type) {
1364     case KVM_HW_WP_WRITE:
1365         if (find_hw_breakpoint(arch_info->addr, -1, arch_info->type)) {
1366             cs->watchpoint_hit = &hw_watchpoint;
1367             hw_watchpoint.vaddr = arch_info->addr;
1368             hw_watchpoint.flags = BP_MEM_WRITE;
1369             ret = EXCP_DEBUG;
1370         }
1371         break;
1372     case KVM_HW_BP:
1373         if (find_hw_breakpoint(arch_info->addr, -1, arch_info->type)) {
1374             ret = EXCP_DEBUG;
1375         }
1376         break;
1377     case KVM_SINGLESTEP:
1378         if (cs->singlestep_enabled) {
1379             ret = EXCP_DEBUG;
1380         }
1381         break;
1382     default:
1383         ret = -ENOSYS;
1384     }
1385
1386     return ret;
1387 }
1388
1389 int kvm_arch_handle_exit(CPUState *cs, struct kvm_run *run)
1390 {
1391     S390CPU *cpu = S390_CPU(cs);
1392     int ret = 0;
1393
1394     switch (run->exit_reason) {
1395         case KVM_EXIT_S390_SIEIC:
1396             ret = handle_intercept(cpu);
1397             break;
1398         case KVM_EXIT_S390_RESET:
1399             qemu_system_reset_request();
1400             break;
1401         case KVM_EXIT_S390_TSCH:
1402             ret = handle_tsch(cpu);
1403             break;
1404         case KVM_EXIT_DEBUG:
1405             ret = kvm_arch_handle_debug_exit(cpu);
1406             break;
1407         default:
1408             fprintf(stderr, "Unknown KVM exit: %d\n", run->exit_reason);
1409             break;
1410     }
1411
1412     if (ret == 0) {
1413         ret = EXCP_INTERRUPT;
1414     }
1415     return ret;
1416 }
1417
1418 bool kvm_arch_stop_on_emulation_error(CPUState *cpu)
1419 {
1420     return true;
1421 }
1422
1423 int kvm_arch_on_sigbus_vcpu(CPUState *cpu, int code, void *addr)
1424 {
1425     return 1;
1426 }
1427
1428 int kvm_arch_on_sigbus(int code, void *addr)
1429 {
1430     return 1;
1431 }
1432
1433 void kvm_s390_io_interrupt(uint16_t subchannel_id,
1434                            uint16_t subchannel_nr, uint32_t io_int_parm,
1435                            uint32_t io_int_word)
1436 {
1437     struct kvm_s390_irq irq = {
1438         .u.io.subchannel_id = subchannel_id,
1439         .u.io.subchannel_nr = subchannel_nr,
1440         .u.io.io_int_parm = io_int_parm,
1441         .u.io.io_int_word = io_int_word,
1442     };
1443
1444     if (io_int_word & IO_INT_WORD_AI) {
1445         irq.type = KVM_S390_INT_IO(1, 0, 0, 0);
1446     } else {
1447         irq.type = ((subchannel_id & 0xff00) << 24) |
1448             ((subchannel_id & 0x00060) << 22) | (subchannel_nr << 16);
1449     }
1450     kvm_s390_floating_interrupt(&irq);
1451 }
1452
1453 void kvm_s390_crw_mchk(void)
1454 {
1455     struct kvm_s390_irq irq = {
1456         .type = KVM_S390_MCHK,
1457         .u.mchk.cr14 = 1 << 28,
1458         .u.mchk.mcic = 0x00400f1d40330000ULL,
1459     };
1460     kvm_s390_floating_interrupt(&irq);
1461 }
1462
1463 void kvm_s390_enable_css_support(S390CPU *cpu)
1464 {
1465     int r;
1466
1467     /* Activate host kernel channel subsystem support. */
1468     r = kvm_vcpu_enable_cap(CPU(cpu), KVM_CAP_S390_CSS_SUPPORT, 0);
1469     assert(r == 0);
1470 }
1471
1472 void kvm_arch_init_irq_routing(KVMState *s)
1473 {
1474     /*
1475      * Note that while irqchip capabilities generally imply that cpustates
1476      * are handled in-kernel, it is not true for s390 (yet); therefore, we
1477      * have to override the common code kvm_halt_in_kernel_allowed setting.
1478      */
1479     if (kvm_check_extension(s, KVM_CAP_IRQ_ROUTING)) {
1480         kvm_gsi_routing_allowed = true;
1481         kvm_halt_in_kernel_allowed = false;
1482     }
1483 }
1484
1485 int kvm_s390_assign_subch_ioeventfd(EventNotifier *notifier, uint32_t sch,
1486                                     int vq, bool assign)
1487 {
1488     struct kvm_ioeventfd kick = {
1489         .flags = KVM_IOEVENTFD_FLAG_VIRTIO_CCW_NOTIFY |
1490         KVM_IOEVENTFD_FLAG_DATAMATCH,
1491         .fd = event_notifier_get_fd(notifier),
1492         .datamatch = vq,
1493         .addr = sch,
1494         .len = 8,
1495     };
1496     if (!kvm_check_extension(kvm_state, KVM_CAP_IOEVENTFD)) {
1497         return -ENOSYS;
1498     }
1499     if (!assign) {
1500         kick.flags |= KVM_IOEVENTFD_FLAG_DEASSIGN;
1501     }
1502     return kvm_vm_ioctl(kvm_state, KVM_IOEVENTFD, &kick);
1503 }
1504
1505 int kvm_s390_get_memslot_count(KVMState *s)
1506 {
1507     return kvm_check_extension(s, KVM_CAP_NR_MEMSLOTS);
1508 }
1509
1510 int kvm_s390_set_cpu_state(S390CPU *cpu, uint8_t cpu_state)
1511 {
1512     struct kvm_mp_state mp_state = {};
1513     int ret;
1514
1515     /* the kvm part might not have been initialized yet */
1516     if (CPU(cpu)->kvm_state == NULL) {
1517         return 0;
1518     }
1519
1520     switch (cpu_state) {
1521     case CPU_STATE_STOPPED:
1522         mp_state.mp_state = KVM_MP_STATE_STOPPED;
1523         break;
1524     case CPU_STATE_CHECK_STOP:
1525         mp_state.mp_state = KVM_MP_STATE_CHECK_STOP;
1526         break;
1527     case CPU_STATE_OPERATING:
1528         mp_state.mp_state = KVM_MP_STATE_OPERATING;
1529         break;
1530     case CPU_STATE_LOAD:
1531         mp_state.mp_state = KVM_MP_STATE_LOAD;
1532         break;
1533     default:
1534         error_report("Requested CPU state is not a valid S390 CPU state: %u",
1535                      cpu_state);
1536         exit(1);
1537     }
1538
1539     ret = kvm_vcpu_ioctl(CPU(cpu), KVM_SET_MP_STATE, &mp_state);
1540     if (ret) {
1541         trace_kvm_failed_cpu_state_set(CPU(cpu)->cpu_index, cpu_state,
1542                                        strerror(-ret));
1543     }
1544
1545     return ret;
1546 }