arch/s390/kvm/interrupt.c

   1 /*
   2  * handling kvm guest interrupts
   3  *
   4  * Copyright IBM Corp. 2008,2014
   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  */
  12
  13 #include <linux/interrupt.h>
  14 #include <linux/kvm_host.h>
  15 #include <linux/hrtimer.h>
  16 #include <linux/mmu_context.h>
  17 #include <linux/signal.h>
  18 #include <linux/slab.h>
  19 #include <linux/bitmap.h>
  20 #include <asm/asm-offsets.h>
  21 #include <asm/uaccess.h>
  22 #include "kvm-s390.h"
  23 #include "gaccess.h"
  24 #include "trace-s390.h"
  25
  26 #define IOINT_SCHID_MASK 0x0000ffff
  27 #define IOINT_SSID_MASK 0x00030000
  28 #define IOINT_CSSID_MASK 0x03fc0000
  29 #define IOINT_AI_MASK 0x04000000
  30 #define PFAULT_INIT 0x0600
  31 #define PFAULT_DONE 0x0680
  32 #define VIRTIO_PARAM 0x0d00
  33
  34 static int is_ioint(u64 type)
  35 {
  36         return ((type & 0xfffe0000u) != 0xfffe0000u);
  37 }
  38
  39 int psw_extint_disabled(struct kvm_vcpu *vcpu)
  40 {
  41         return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_EXT);
  42 }
  43
  44 static int psw_ioint_disabled(struct kvm_vcpu *vcpu)
  45 {
  46         return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_IO);
  47 }
  48
  49 static int psw_mchk_disabled(struct kvm_vcpu *vcpu)
  50 {
  51         return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_MCHECK);
  52 }
  53
  54 static int psw_interrupts_disabled(struct kvm_vcpu *vcpu)
  55 {
  56         if ((vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PER) ||
  57             (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_IO) ||
  58             (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_EXT))
  59                 return 0;
  60         return 1;
  61 }
  62
  63 static int ckc_interrupts_enabled(struct kvm_vcpu *vcpu)
  64 {
  65         if (psw_extint_disabled(vcpu) ||
  66             !(vcpu->arch.sie_block->gcr[0] & 0x800ul))
  67                 return 0;
  68         if (guestdbg_enabled(vcpu) && guestdbg_sstep_enabled(vcpu))
  69                 /* No timer interrupts when single stepping */
  70                 return 0;
  71         return 1;
  72 }
  73
  74 static u64 int_word_to_isc_bits(u32 int_word)
  75 {
  76         u8 isc = (int_word & 0x38000000) >> 27;
  77
  78         return (0x80 >> isc) << 24;
  79 }
  80
  81 static int __must_check __interrupt_is_deliverable(struct kvm_vcpu *vcpu,
  82                                       struct kvm_s390_interrupt_info *inti)
  83 {
  84         switch (inti->type) {
  85         case KVM_S390_INT_EXTERNAL_CALL:
  86                 if (psw_extint_disabled(vcpu))
  87                         return 0;
  88                 if (vcpu->arch.sie_block->gcr[0] & 0x2000ul)
  89                         return 1;
  90                 return 0;
  91         case KVM_S390_INT_EMERGENCY:
  92                 if (psw_extint_disabled(vcpu))
  93                         return 0;
  94                 if (vcpu->arch.sie_block->gcr[0] & 0x4000ul)
  95                         return 1;
  96                 return 0;
  97         case KVM_S390_INT_CLOCK_COMP:
  98                 return ckc_interrupts_enabled(vcpu);
  99         case KVM_S390_INT_CPU_TIMER:
 100                 if (psw_extint_disabled(vcpu))
 101                         return 0;
 102                 if (vcpu->arch.sie_block->gcr[0] & 0x400ul)
 103                         return 1;
 104                 return 0;
 105         case KVM_S390_INT_SERVICE:
 106         case KVM_S390_INT_PFAULT_INIT:
 107         case KVM_S390_INT_PFAULT_DONE:
 108         case KVM_S390_INT_VIRTIO:
 109                 if (psw_extint_disabled(vcpu))
 110                         return 0;
 111                 if (vcpu->arch.sie_block->gcr[0] & 0x200ul)
 112                         return 1;
 113                 return 0;
 114         case KVM_S390_PROGRAM_INT:
 115         case KVM_S390_SIGP_STOP:
 116         case KVM_S390_SIGP_SET_PREFIX:
 117         case KVM_S390_RESTART:
 118                 return 1;
 119         case KVM_S390_MCHK:
 120                 if (psw_mchk_disabled(vcpu))
 121                         return 0;
 122                 if (vcpu->arch.sie_block->gcr[14] & inti->mchk.cr14)
 123                         return 1;
 124                 return 0;
 125         case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
 126                 if (psw_ioint_disabled(vcpu))
 127                         return 0;
 128                 if (vcpu->arch.sie_block->gcr[6] &
 129                     int_word_to_isc_bits(inti->io.io_int_word))
 130                         return 1;
 131                 return 0;
 132         default:
 133                 printk(KERN_WARNING "illegal interrupt type %llx\n",
 134                        inti->type);
 135                 BUG();
 136         }
 137         return 0;
 138 }
 139
 140 static inline unsigned long pending_local_irqs(struct kvm_vcpu *vcpu)
 141 {
 142         return vcpu->arch.local_int.pending_irqs;
 143 }
 144
 145 static unsigned long deliverable_local_irqs(struct kvm_vcpu *vcpu)
 146 {
 147         unsigned long active_mask = pending_local_irqs(vcpu);
 148
 149         if (psw_extint_disabled(vcpu))
 150                 active_mask &= ~IRQ_PEND_EXT_MASK;
 151         if (!(vcpu->arch.sie_block->gcr[0] & 0x2000ul))
 152                 __clear_bit(IRQ_PEND_EXT_EXTERNAL, &active_mask);
 153         if (!(vcpu->arch.sie_block->gcr[0] & 0x4000ul))
 154                 __clear_bit(IRQ_PEND_EXT_EMERGENCY, &active_mask);
 155         if (!(vcpu->arch.sie_block->gcr[0] & 0x800ul))
 156                 __clear_bit(IRQ_PEND_EXT_CLOCK_COMP, &active_mask);
 157         if (!(vcpu->arch.sie_block->gcr[0] & 0x400ul))
 158                 __clear_bit(IRQ_PEND_EXT_CPU_TIMER, &active_mask);
 159         if (psw_mchk_disabled(vcpu))
 160                 active_mask &= ~IRQ_PEND_MCHK_MASK;
 161
 162         return active_mask;
 163 }
 164
 165 static void __set_cpu_idle(struct kvm_vcpu *vcpu)
 166 {
 167         atomic_set_mask(CPUSTAT_WAIT, &vcpu->arch.sie_block->cpuflags);
 168         set_bit(vcpu->vcpu_id, vcpu->arch.local_int.float_int->idle_mask);
 169 }
 170
 171 static void __unset_cpu_idle(struct kvm_vcpu *vcpu)
 172 {
 173         atomic_clear_mask(CPUSTAT_WAIT, &vcpu->arch.sie_block->cpuflags);
 174         clear_bit(vcpu->vcpu_id, vcpu->arch.local_int.float_int->idle_mask);
 175 }
 176
 177 static void __reset_intercept_indicators(struct kvm_vcpu *vcpu)
 178 {
 179         atomic_clear_mask(CPUSTAT_IO_INT | CPUSTAT_EXT_INT | CPUSTAT_STOP_INT,
 180                           &vcpu->arch.sie_block->cpuflags);
 181         vcpu->arch.sie_block->lctl = 0x0000;
 182         vcpu->arch.sie_block->ictl &= ~(ICTL_LPSW | ICTL_STCTL | ICTL_PINT);
 183
 184         if (guestdbg_enabled(vcpu)) {
 185                 vcpu->arch.sie_block->lctl |= (LCTL_CR0 | LCTL_CR9 |
 186                                                LCTL_CR10 | LCTL_CR11);
 187                 vcpu->arch.sie_block->ictl |= (ICTL_STCTL | ICTL_PINT);
 188         }
 189
 190         if (vcpu->arch.local_int.action_bits & ACTION_STOP_ON_STOP)
 191                 atomic_set_mask(CPUSTAT_STOP_INT, &vcpu->arch.sie_block->cpuflags);
 192 }
 193
 194 static void __set_cpuflag(struct kvm_vcpu *vcpu, u32 flag)
 195 {
 196         atomic_set_mask(flag, &vcpu->arch.sie_block->cpuflags);
 197 }
 198
 199 static void set_intercept_indicators_ext(struct kvm_vcpu *vcpu)
 200 {
 201         if (!(pending_local_irqs(vcpu) & IRQ_PEND_EXT_MASK))
 202                 return;
 203         if (psw_extint_disabled(vcpu))
 204                 __set_cpuflag(vcpu, CPUSTAT_EXT_INT);
 205         else
 206                 vcpu->arch.sie_block->lctl |= LCTL_CR0;
 207 }
 208
 209 static void set_intercept_indicators_mchk(struct kvm_vcpu *vcpu)
 210 {
 211         if (!(pending_local_irqs(vcpu) & IRQ_PEND_MCHK_MASK))
 212                 return;
 213         if (psw_mchk_disabled(vcpu))
 214                 vcpu->arch.sie_block->ictl |= ICTL_LPSW;
 215         else
 216                 vcpu->arch.sie_block->lctl |= LCTL_CR14;
 217 }
 218
 219 /* Set interception request for non-deliverable local interrupts */
 220 static void set_intercept_indicators_local(struct kvm_vcpu *vcpu)
 221 {
 222         set_intercept_indicators_ext(vcpu);
 223         set_intercept_indicators_mchk(vcpu);
 224 }
 225
 226 static void __set_intercept_indicator(struct kvm_vcpu *vcpu,
 227                                       struct kvm_s390_interrupt_info *inti)
 228 {
 229         switch (inti->type) {
 230         case KVM_S390_INT_SERVICE:
 231         case KVM_S390_INT_PFAULT_DONE:
 232         case KVM_S390_INT_VIRTIO:
 233                 if (psw_extint_disabled(vcpu))
 234                         __set_cpuflag(vcpu, CPUSTAT_EXT_INT);
 235                 else
 236                         vcpu->arch.sie_block->lctl |= LCTL_CR0;
 237                 break;
 238         case KVM_S390_MCHK:
 239                 if (psw_mchk_disabled(vcpu))
 240                         vcpu->arch.sie_block->ictl |= ICTL_LPSW;
 241                 else
 242                         vcpu->arch.sie_block->lctl |= LCTL_CR14;
 243                 break;
 244         case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
 245                 if (psw_ioint_disabled(vcpu))
 246                         __set_cpuflag(vcpu, CPUSTAT_IO_INT);
 247                 else
 248                         vcpu->arch.sie_block->lctl |= LCTL_CR6;
 249                 break;
 250         default:
 251                 BUG();
 252         }
 253 }
 254
 255 static u16 get_ilc(struct kvm_vcpu *vcpu)
 256 {
 257         const unsigned short table[] = { 2, 4, 4, 6 };
 258
 259         switch (vcpu->arch.sie_block->icptcode) {
 260         case ICPT_INST:
 261         case ICPT_INSTPROGI:
 262         case ICPT_OPEREXC:
 263         case ICPT_PARTEXEC:
 264         case ICPT_IOINST:
 265                 /* last instruction only stored for these icptcodes */
 266                 return table[vcpu->arch.sie_block->ipa >> 14];
 267         case ICPT_PROGI:
 268                 return vcpu->arch.sie_block->pgmilc;
 269         default:
 270                 return 0;
 271         }
 272 }
 273
 274 static int __must_check __deliver_cpu_timer(struct kvm_vcpu *vcpu)
 275 {
 276         struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
 277         int rc;
 278
 279         trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_CPU_TIMER,
 280                                          0, 0);
 281
 282         rc  = put_guest_lc(vcpu, EXT_IRQ_CPU_TIMER,
 283                            (u16 *)__LC_EXT_INT_CODE);
 284         rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
 285                              &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
 286         rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
 287                             &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
 288         clear_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs);
 289         return rc;
 290 }
 291
 292 static int __must_check __deliver_ckc(struct kvm_vcpu *vcpu)
 293 {
 294         struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
 295         int rc;
 296
 297         trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_CLOCK_COMP,
 298                                          0, 0);
 299
 300         rc  = put_guest_lc(vcpu, EXT_IRQ_CLK_COMP,
 301                            (u16 __user *)__LC_EXT_INT_CODE);
 302         rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
 303                              &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
 304         rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
 305                             &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
 306         clear_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs);
 307         return rc;
 308 }
 309
 310 static int __must_check __deliver_pfault_init(struct kvm_vcpu *vcpu)
 311 {
 312         struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
 313         struct kvm_s390_ext_info ext;
 314         int rc;
 315
 316         spin_lock(&li->lock);
 317         ext = li->irq.ext;
 318         clear_bit(IRQ_PEND_PFAULT_INIT, &li->pending_irqs);
 319         li->irq.ext.ext_params2 = 0;
 320         spin_unlock(&li->lock);
 321
 322         VCPU_EVENT(vcpu, 4, "interrupt: pfault init parm:%x,parm64:%llx",
 323                    0, ext.ext_params2);
 324         trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
 325                                          KVM_S390_INT_PFAULT_INIT,
 326                                          0, ext.ext_params2);
 327
 328         rc  = put_guest_lc(vcpu, EXT_IRQ_CP_SERVICE, (u16 *) __LC_EXT_INT_CODE);
 329         rc |= put_guest_lc(vcpu, PFAULT_INIT, (u16 *) __LC_EXT_CPU_ADDR);
 330         rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
 331                              &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
 332         rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
 333                             &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
 334         rc |= put_guest_lc(vcpu, ext.ext_params2, (u64 *) __LC_EXT_PARAMS2);
 335         return rc;
 336 }
 337
 338 static int __must_check __deliver_machine_check(struct kvm_vcpu *vcpu)
 339 {
 340         struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
 341         struct kvm_s390_mchk_info mchk;
 342         int rc;
 343
 344         spin_lock(&li->lock);
 345         mchk = li->irq.mchk;
 346         /*
 347          * If there was an exigent machine check pending, then any repressible
 348          * machine checks that might have been pending are indicated along
 349          * with it, so always clear both bits
 350          */
 351         clear_bit(IRQ_PEND_MCHK_EX, &li->pending_irqs);
 352         clear_bit(IRQ_PEND_MCHK_REP, &li->pending_irqs);
 353         memset(&li->irq.mchk, 0, sizeof(mchk));
 354         spin_unlock(&li->lock);
 355
 356         VCPU_EVENT(vcpu, 4, "interrupt: machine check mcic=%llx",
 357                    mchk.mcic);
 358         trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_MCHK,
 359                                          mchk.cr14, mchk.mcic);
 360
 361         rc  = kvm_s390_vcpu_store_status(vcpu, KVM_S390_STORE_STATUS_PREFIXED);
 362         rc |= put_guest_lc(vcpu, mchk.mcic,
 363                            (u64 __user *) __LC_MCCK_CODE);
 364         rc |= put_guest_lc(vcpu, mchk.failing_storage_address,
 365                            (u64 __user *) __LC_MCCK_FAIL_STOR_ADDR);
 366         rc |= write_guest_lc(vcpu, __LC_PSW_SAVE_AREA,
 367                              &mchk.fixed_logout, sizeof(mchk.fixed_logout));
 368         rc |= write_guest_lc(vcpu, __LC_MCK_OLD_PSW,
 369                              &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
 370         rc |= read_guest_lc(vcpu, __LC_MCK_NEW_PSW,
 371                             &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
 372         return rc;
 373 }
 374
 375 static int __must_check __deliver_restart(struct kvm_vcpu *vcpu)
 376 {
 377         struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
 378         int rc;
 379
 380         VCPU_EVENT(vcpu, 4, "%s", "interrupt: cpu restart");
 381         vcpu->stat.deliver_restart_signal++;
 382         trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_RESTART, 0, 0);
 383
 384         rc  = write_guest_lc(vcpu,
 385                              offsetof(struct _lowcore, restart_old_psw),
 386                              &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
 387         rc |= read_guest_lc(vcpu, offsetof(struct _lowcore, restart_psw),
 388                             &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
 389         clear_bit(IRQ_PEND_RESTART, &li->pending_irqs);
 390         return rc;
 391 }
 392
 393 static int __must_check __deliver_stop(struct kvm_vcpu *vcpu)
 394 {
 395         VCPU_EVENT(vcpu, 4, "%s", "interrupt: cpu stop");
 396         vcpu->stat.deliver_stop_signal++;
 397         trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_SIGP_STOP,
 398                                          0, 0);
 399
 400         __set_cpuflag(vcpu, CPUSTAT_STOP_INT);
 401         clear_bit(IRQ_PEND_SIGP_STOP, &vcpu->arch.local_int.pending_irqs);
 402         return 0;
 403 }
 404
 405 static int __must_check __deliver_set_prefix(struct kvm_vcpu *vcpu)
 406 {
 407         struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
 408         struct kvm_s390_prefix_info prefix;
 409
 410         spin_lock(&li->lock);
 411         prefix = li->irq.prefix;
 412         li->irq.prefix.address = 0;
 413         clear_bit(IRQ_PEND_SET_PREFIX, &li->pending_irqs);
 414         spin_unlock(&li->lock);
 415
 416         VCPU_EVENT(vcpu, 4, "interrupt: set prefix to %x", prefix.address);
 417         vcpu->stat.deliver_prefix_signal++;
 418         trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
 419                                          KVM_S390_SIGP_SET_PREFIX,
 420                                          prefix.address, 0);
 421
 422         kvm_s390_set_prefix(vcpu, prefix.address);
 423         return 0;
 424 }
 425
 426 static int __must_check __deliver_emergency_signal(struct kvm_vcpu *vcpu)
 427 {
 428         struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
 429         int rc;
 430         int cpu_addr;
 431
 432         spin_lock(&li->lock);
 433         cpu_addr = find_first_bit(li->sigp_emerg_pending, KVM_MAX_VCPUS);
 434         clear_bit(cpu_addr, li->sigp_emerg_pending);
 435         if (bitmap_empty(li->sigp_emerg_pending, KVM_MAX_VCPUS))
 436                 clear_bit(IRQ_PEND_EXT_EMERGENCY, &li->pending_irqs);
 437         spin_unlock(&li->lock);
 438
 439         VCPU_EVENT(vcpu, 4, "%s", "interrupt: sigp emerg");
 440         vcpu->stat.deliver_emergency_signal++;
 441         trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_EMERGENCY,
 442                                          cpu_addr, 0);
 443
 444         rc  = put_guest_lc(vcpu, EXT_IRQ_EMERGENCY_SIG,
 445                            (u16 *)__LC_EXT_INT_CODE);
 446         rc |= put_guest_lc(vcpu, cpu_addr, (u16 *)__LC_EXT_CPU_ADDR);
 447         rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
 448                              &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
 449         rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
 450                             &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
 451         return rc;
 452 }
 453
 454 static int __must_check __deliver_external_call(struct kvm_vcpu *vcpu)
 455 {
 456         struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
 457         struct kvm_s390_extcall_info extcall;
 458         int rc;
 459
 460         spin_lock(&li->lock);
 461         extcall = li->irq.extcall;
 462         li->irq.extcall.code = 0;
 463         clear_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs);
 464         spin_unlock(&li->lock);
 465
 466         VCPU_EVENT(vcpu, 4, "%s", "interrupt: sigp ext call");
 467         vcpu->stat.deliver_external_call++;
 468         trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
 469                                          KVM_S390_INT_EXTERNAL_CALL,
 470                                          extcall.code, 0);
 471
 472         rc  = put_guest_lc(vcpu, EXT_IRQ_EXTERNAL_CALL,
 473                            (u16 *)__LC_EXT_INT_CODE);
 474         rc |= put_guest_lc(vcpu, extcall.code, (u16 *)__LC_EXT_CPU_ADDR);
 475         rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
 476                              &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
 477         rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, &vcpu->arch.sie_block->gpsw,
 478                             sizeof(psw_t));
 479         return rc;
 480 }
 481
 482 static int __must_check __deliver_prog(struct kvm_vcpu *vcpu)
 483 {
 484         struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
 485         struct kvm_s390_pgm_info pgm_info;
 486         int rc = 0;
 487         u16 ilc = get_ilc(vcpu);
 488
 489         spin_lock(&li->lock);
 490         pgm_info = li->irq.pgm;
 491         clear_bit(IRQ_PEND_PROG, &li->pending_irqs);
 492         memset(&li->irq.pgm, 0, sizeof(pgm_info));
 493         spin_unlock(&li->lock);
 494
 495         VCPU_EVENT(vcpu, 4, "interrupt: pgm check code:%x, ilc:%x",
 496                    pgm_info.code, ilc);
 497         vcpu->stat.deliver_program_int++;
 498         trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_PROGRAM_INT,
 499                                          pgm_info.code, 0);
 500
 501         switch (pgm_info.code & ~PGM_PER) {
 502         case PGM_AFX_TRANSLATION:
 503         case PGM_ASX_TRANSLATION:
 504         case PGM_EX_TRANSLATION:
 505         case PGM_LFX_TRANSLATION:
 506         case PGM_LSTE_SEQUENCE:
 507         case PGM_LSX_TRANSLATION:
 508         case PGM_LX_TRANSLATION:
 509         case PGM_PRIMARY_AUTHORITY:
 510         case PGM_SECONDARY_AUTHORITY:
 511         case PGM_SPACE_SWITCH:
 512                 rc = put_guest_lc(vcpu, pgm_info.trans_exc_code,
 513                                   (u64 *)__LC_TRANS_EXC_CODE);
 514                 break;
 515         case PGM_ALEN_TRANSLATION:
 516         case PGM_ALE_SEQUENCE:
 517         case PGM_ASTE_INSTANCE:
 518         case PGM_ASTE_SEQUENCE:
 519         case PGM_ASTE_VALIDITY:
 520         case PGM_EXTENDED_AUTHORITY:
 521                 rc = put_guest_lc(vcpu, pgm_info.exc_access_id,
 522                                   (u8 *)__LC_EXC_ACCESS_ID);
 523                 break;
 524         case PGM_ASCE_TYPE:
 525         case PGM_PAGE_TRANSLATION:
 526         case PGM_REGION_FIRST_TRANS:
 527         case PGM_REGION_SECOND_TRANS:
 528         case PGM_REGION_THIRD_TRANS:
 529         case PGM_SEGMENT_TRANSLATION:
 530                 rc = put_guest_lc(vcpu, pgm_info.trans_exc_code,
 531                                   (u64 *)__LC_TRANS_EXC_CODE);
 532                 rc |= put_guest_lc(vcpu, pgm_info.exc_access_id,
 533                                    (u8 *)__LC_EXC_ACCESS_ID);
 534                 rc |= put_guest_lc(vcpu, pgm_info.op_access_id,
 535                                    (u8 *)__LC_OP_ACCESS_ID);
 536                 break;
 537         case PGM_MONITOR:
 538                 rc = put_guest_lc(vcpu, pgm_info.mon_class_nr,
 539                                   (u16 *)__LC_MON_CLASS_NR);
 540                 rc |= put_guest_lc(vcpu, pgm_info.mon_code,
 541                                    (u64 *)__LC_MON_CODE);
 542                 break;
 543         case PGM_DATA:
 544                 rc = put_guest_lc(vcpu, pgm_info.data_exc_code,
 545                                   (u32 *)__LC_DATA_EXC_CODE);
 546                 break;
 547         case PGM_PROTECTION:
 548                 rc = put_guest_lc(vcpu, pgm_info.trans_exc_code,
 549                                   (u64 *)__LC_TRANS_EXC_CODE);
 550                 rc |= put_guest_lc(vcpu, pgm_info.exc_access_id,
 551                                    (u8 *)__LC_EXC_ACCESS_ID);
 552                 break;
 553         }
 554
 555         if (pgm_info.code & PGM_PER) {
 556                 rc |= put_guest_lc(vcpu, pgm_info.per_code,
 557                                    (u8 *) __LC_PER_CODE);
 558                 rc |= put_guest_lc(vcpu, pgm_info.per_atmid,
 559                                    (u8 *)__LC_PER_ATMID);
 560                 rc |= put_guest_lc(vcpu, pgm_info.per_address,
 561                                    (u64 *) __LC_PER_ADDRESS);
 562                 rc |= put_guest_lc(vcpu, pgm_info.per_access_id,
 563                                    (u8 *) __LC_PER_ACCESS_ID);
 564         }
 565
 566         rc |= put_guest_lc(vcpu, ilc, (u16 *) __LC_PGM_ILC);
 567         rc |= put_guest_lc(vcpu, pgm_info.code,
 568                            (u16 *)__LC_PGM_INT_CODE);
 569         rc |= write_guest_lc(vcpu, __LC_PGM_OLD_PSW,
 570                              &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
 571         rc |= read_guest_lc(vcpu, __LC_PGM_NEW_PSW,
 572                             &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
 573         return rc;
 574 }
 575
 576 static int __must_check __deliver_service(struct kvm_vcpu *vcpu,
 577                                           struct kvm_s390_interrupt_info *inti)
 578 {
 579         int rc;
 580
 581         VCPU_EVENT(vcpu, 4, "interrupt: sclp parm:%x",
 582                    inti->ext.ext_params);
 583         vcpu->stat.deliver_service_signal++;
 584         trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
 585                                          inti->ext.ext_params, 0);
 586
 587         rc  = put_guest_lc(vcpu, EXT_IRQ_SERVICE_SIG, (u16 *)__LC_EXT_INT_CODE);
 588         rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
 589                              &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
 590         rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
 591                             &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
 592         rc |= put_guest_lc(vcpu, inti->ext.ext_params,
 593                            (u32 *)__LC_EXT_PARAMS);
 594         return rc;
 595 }
 596
 597 static int __must_check __deliver_pfault_done(struct kvm_vcpu *vcpu,
 598                                            struct kvm_s390_interrupt_info *inti)
 599 {
 600         int rc;
 601
 602         trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
 603                                          KVM_S390_INT_PFAULT_DONE, 0,
 604                                          inti->ext.ext_params2);
 605
 606         rc  = put_guest_lc(vcpu, EXT_IRQ_CP_SERVICE, (u16 *)__LC_EXT_INT_CODE);
 607         rc |= put_guest_lc(vcpu, PFAULT_DONE, (u16 *)__LC_EXT_CPU_ADDR);
 608         rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
 609                              &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
 610         rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
 611                             &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
 612         rc |= put_guest_lc(vcpu, inti->ext.ext_params2,
 613                            (u64 *)__LC_EXT_PARAMS2);
 614         return rc;
 615 }
 616
 617 static int __must_check __deliver_virtio(struct kvm_vcpu *vcpu,
 618                                          struct kvm_s390_interrupt_info *inti)
 619 {
 620         int rc;
 621
 622         VCPU_EVENT(vcpu, 4, "interrupt: virtio parm:%x,parm64:%llx",
 623                    inti->ext.ext_params, inti->ext.ext_params2);
 624         vcpu->stat.deliver_virtio_interrupt++;
 625         trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
 626                                          inti->ext.ext_params,
 627                                          inti->ext.ext_params2);
 628
 629         rc  = put_guest_lc(vcpu, EXT_IRQ_CP_SERVICE, (u16 *)__LC_EXT_INT_CODE);
 630         rc |= put_guest_lc(vcpu, VIRTIO_PARAM, (u16 *)__LC_EXT_CPU_ADDR);
 631         rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
 632                              &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
 633         rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
 634                             &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
 635         rc |= put_guest_lc(vcpu, inti->ext.ext_params,
 636                            (u32 *)__LC_EXT_PARAMS);
 637         rc |= put_guest_lc(vcpu, inti->ext.ext_params2,
 638                            (u64 *)__LC_EXT_PARAMS2);
 639         return rc;
 640 }
 641
 642 static int __must_check __deliver_io(struct kvm_vcpu *vcpu,
 643                                      struct kvm_s390_interrupt_info *inti)
 644 {
 645         int rc;
 646
 647         VCPU_EVENT(vcpu, 4, "interrupt: I/O %llx", inti->type);
 648         vcpu->stat.deliver_io_int++;
 649         trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
 650                                          ((__u32)inti->io.subchannel_id << 16) |
 651                                                 inti->io.subchannel_nr,
 652                                          ((__u64)inti->io.io_int_parm << 32) |
 653                                                 inti->io.io_int_word);
 654
 655         rc  = put_guest_lc(vcpu, inti->io.subchannel_id,
 656                            (u16 *)__LC_SUBCHANNEL_ID);
 657         rc |= put_guest_lc(vcpu, inti->io.subchannel_nr,
 658                            (u16 *)__LC_SUBCHANNEL_NR);
 659         rc |= put_guest_lc(vcpu, inti->io.io_int_parm,
 660                            (u32 *)__LC_IO_INT_PARM);
 661         rc |= put_guest_lc(vcpu, inti->io.io_int_word,
 662                            (u32 *)__LC_IO_INT_WORD);
 663         rc |= write_guest_lc(vcpu, __LC_IO_OLD_PSW,
 664                              &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
 665         rc |= read_guest_lc(vcpu, __LC_IO_NEW_PSW,
 666                             &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
 667         return rc;
 668 }
 669
 670 static int __must_check __deliver_mchk_floating(struct kvm_vcpu *vcpu,
 671                                            struct kvm_s390_interrupt_info *inti)
 672 {
 673         struct kvm_s390_mchk_info *mchk = &inti->mchk;
 674         int rc;
 675
 676         VCPU_EVENT(vcpu, 4, "interrupt: machine check mcic=%llx",
 677                    mchk->mcic);
 678         trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_MCHK,
 679                                          mchk->cr14, mchk->mcic);
 680
 681         rc  = kvm_s390_vcpu_store_status(vcpu, KVM_S390_STORE_STATUS_PREFIXED);
 682         rc |= put_guest_lc(vcpu, mchk->mcic,
 683                         (u64 __user *) __LC_MCCK_CODE);
 684         rc |= put_guest_lc(vcpu, mchk->failing_storage_address,
 685                         (u64 __user *) __LC_MCCK_FAIL_STOR_ADDR);
 686         rc |= write_guest_lc(vcpu, __LC_PSW_SAVE_AREA,
 687                              &mchk->fixed_logout, sizeof(mchk->fixed_logout));
 688         rc |= write_guest_lc(vcpu, __LC_MCK_OLD_PSW,
 689                              &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
 690         rc |= read_guest_lc(vcpu, __LC_MCK_NEW_PSW,
 691                             &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
 692         return rc;
 693 }
 694
 695 typedef int (*deliver_irq_t)(struct kvm_vcpu *vcpu);
 696
 697 static const deliver_irq_t deliver_irq_funcs[] = {
 698         [IRQ_PEND_MCHK_EX]        = __deliver_machine_check,
 699         [IRQ_PEND_PROG]           = __deliver_prog,
 700         [IRQ_PEND_EXT_EMERGENCY]  = __deliver_emergency_signal,
 701         [IRQ_PEND_EXT_EXTERNAL]   = __deliver_external_call,
 702         [IRQ_PEND_EXT_CLOCK_COMP] = __deliver_ckc,
 703         [IRQ_PEND_EXT_CPU_TIMER]  = __deliver_cpu_timer,
 704         [IRQ_PEND_RESTART]        = __deliver_restart,
 705         [IRQ_PEND_SIGP_STOP]      = __deliver_stop,
 706         [IRQ_PEND_SET_PREFIX]     = __deliver_set_prefix,
 707         [IRQ_PEND_PFAULT_INIT]    = __deliver_pfault_init,
 708 };
 709
 710 static int __must_check __deliver_floating_interrupt(struct kvm_vcpu *vcpu,
 711                                            struct kvm_s390_interrupt_info *inti)
 712 {
 713         int rc;
 714
 715         switch (inti->type) {
 716         case KVM_S390_INT_SERVICE:
 717                 rc = __deliver_service(vcpu, inti);
 718                 break;
 719         case KVM_S390_INT_PFAULT_DONE:
 720                 rc = __deliver_pfault_done(vcpu, inti);
 721                 break;
 722         case KVM_S390_INT_VIRTIO:
 723                 rc = __deliver_virtio(vcpu, inti);
 724                 break;
 725         case KVM_S390_MCHK:
 726                 rc = __deliver_mchk_floating(vcpu, inti);
 727                 break;
 728         case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
 729                 rc = __deliver_io(vcpu, inti);
 730                 break;
 731         default:
 732                 BUG();
 733         }
 734
 735         return rc;
 736 }
 737
 738 /* Check whether SIGP interpretation facility has an external call pending */
 739 int kvm_s390_si_ext_call_pending(struct kvm_vcpu *vcpu)
 740 {
 741         atomic_t *sigp_ctrl = &vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].ctrl;
 742
 743         if (!psw_extint_disabled(vcpu) &&
 744             (vcpu->arch.sie_block->gcr[0] & 0x2000ul) &&
 745             (atomic_read(sigp_ctrl) & SIGP_CTRL_C) &&
 746             (atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_ECALL_PEND))
 747                 return 1;
 748
 749         return 0;
 750 }
 751
 752 int kvm_cpu_has_interrupt(struct kvm_vcpu *vcpu)
 753 {
 754         struct kvm_s390_float_interrupt *fi = vcpu->arch.local_int.float_int;
 755         struct kvm_s390_interrupt_info  *inti;
 756         int rc;
 757
 758         rc = !!deliverable_local_irqs(vcpu);
 759
 760         if ((!rc) && atomic_read(&fi->active)) {
 761                 spin_lock(&fi->lock);
 762                 list_for_each_entry(inti, &fi->list, list)
 763                         if (__interrupt_is_deliverable(vcpu, inti)) {
 764                                 rc = 1;
 765                                 break;
 766                         }
 767                 spin_unlock(&fi->lock);
 768         }
 769
 770         if (!rc && kvm_cpu_has_pending_timer(vcpu))
 771                 rc = 1;
 772
 773         if (!rc && kvm_s390_si_ext_call_pending(vcpu))
 774                 rc = 1;
 775
 776         return rc;
 777 }
 778
 779 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
 780 {
 781         if (!(vcpu->arch.sie_block->ckc <
 782               get_tod_clock_fast() + vcpu->arch.sie_block->epoch))
 783                 return 0;
 784         if (!ckc_interrupts_enabled(vcpu))
 785                 return 0;
 786         return 1;
 787 }
 788
 789 int kvm_s390_handle_wait(struct kvm_vcpu *vcpu)
 790 {
 791         u64 now, sltime;
 792
 793         vcpu->stat.exit_wait_state++;
 794
 795         /* fast path */
 796         if (kvm_cpu_has_pending_timer(vcpu) || kvm_arch_vcpu_runnable(vcpu))
 797                 return 0;
 798
 799         if (psw_interrupts_disabled(vcpu)) {
 800                 VCPU_EVENT(vcpu, 3, "%s", "disabled wait");
 801                 return -EOPNOTSUPP; /* disabled wait */
 802         }
 803
 804         __set_cpu_idle(vcpu);
 805         if (!ckc_interrupts_enabled(vcpu)) {
 806                 VCPU_EVENT(vcpu, 3, "%s", "enabled wait w/o timer");
 807                 goto no_timer;
 808         }
 809
 810         now = get_tod_clock_fast() + vcpu->arch.sie_block->epoch;
 811         sltime = tod_to_ns(vcpu->arch.sie_block->ckc - now);
 812         hrtimer_start(&vcpu->arch.ckc_timer, ktime_set (0, sltime) , HRTIMER_MODE_REL);
 813         VCPU_EVENT(vcpu, 5, "enabled wait via clock comparator: %llx ns", sltime);
 814 no_timer:
 815         srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
 816         kvm_vcpu_block(vcpu);
 817         __unset_cpu_idle(vcpu);
 818         vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
 819
 820         hrtimer_try_to_cancel(&vcpu->arch.ckc_timer);
 821         return 0;
 822 }
 823
 824 void kvm_s390_vcpu_wakeup(struct kvm_vcpu *vcpu)
 825 {
 826         if (waitqueue_active(&vcpu->wq)) {
 827                 /*
 828                  * The vcpu gave up the cpu voluntarily, mark it as a good
 829                  * yield-candidate.
 830                  */
 831                 vcpu->preempted = true;
 832                 wake_up_interruptible(&vcpu->wq);
 833                 vcpu->stat.halt_wakeup++;
 834         }
 835 }
 836
 837 enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer)
 838 {
 839         struct kvm_vcpu *vcpu;
 840
 841         vcpu = container_of(timer, struct kvm_vcpu, arch.ckc_timer);
 842         kvm_s390_vcpu_wakeup(vcpu);
 843
 844         return HRTIMER_NORESTART;
 845 }
 846
 847 void kvm_s390_clear_local_irqs(struct kvm_vcpu *vcpu)
 848 {
 849         struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
 850
 851         spin_lock(&li->lock);
 852         li->pending_irqs = 0;
 853         bitmap_zero(li->sigp_emerg_pending, KVM_MAX_VCPUS);
 854         memset(&li->irq, 0, sizeof(li->irq));
 855         spin_unlock(&li->lock);
 856
 857         /* clear pending external calls set by sigp interpretation facility */
 858         atomic_clear_mask(CPUSTAT_ECALL_PEND, li->cpuflags);
 859         atomic_clear_mask(SIGP_CTRL_C,
 860                           &vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].ctrl);
 861 }
 862
 863 int __must_check kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu)
 864 {
 865         struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
 866         struct kvm_s390_float_interrupt *fi = vcpu->arch.local_int.float_int;
 867         struct kvm_s390_interrupt_info  *n, *inti = NULL;
 868         deliver_irq_t func;
 869         int deliver;
 870         int rc = 0;
 871         unsigned long irq_type;
 872         unsigned long deliverable_irqs;
 873
 874         __reset_intercept_indicators(vcpu);
 875
 876         /* pending ckc conditions might have been invalidated */
 877         clear_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs);
 878         if (kvm_cpu_has_pending_timer(vcpu))
 879                 set_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs);
 880
 881         do {
 882                 deliverable_irqs = deliverable_local_irqs(vcpu);
 883                 /* bits are in the order of interrupt priority */
 884                 irq_type = find_first_bit(&deliverable_irqs, IRQ_PEND_COUNT);
 885                 if (irq_type == IRQ_PEND_COUNT)
 886                         break;
 887                 func = deliver_irq_funcs[irq_type];
 888                 if (!func) {
 889                         WARN_ON_ONCE(func == NULL);
 890                         clear_bit(irq_type, &li->pending_irqs);
 891                         continue;
 892                 }
 893                 rc = func(vcpu);
 894         } while (!rc && irq_type != IRQ_PEND_COUNT);
 895
 896         set_intercept_indicators_local(vcpu);
 897
 898         if (!rc && atomic_read(&fi->active)) {
 899                 do {
 900                         deliver = 0;
 901                         spin_lock(&fi->lock);
 902                         list_for_each_entry_safe(inti, n, &fi->list, list) {
 903                                 if (__interrupt_is_deliverable(vcpu, inti)) {
 904                                         list_del(&inti->list);
 905                                         fi->irq_count--;
 906                                         deliver = 1;
 907                                         break;
 908                                 }
 909                                 __set_intercept_indicator(vcpu, inti);
 910                         }
 911                         if (list_empty(&fi->list))
 912                                 atomic_set(&fi->active, 0);
 913                         spin_unlock(&fi->lock);
 914                         if (deliver) {
 915                                 rc = __deliver_floating_interrupt(vcpu, inti);
 916                                 kfree(inti);
 917                         }
 918                 } while (!rc && deliver);
 919         }
 920
 921         return rc;
 922 }
 923
 924 static int __inject_prog(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
 925 {
 926         struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
 927
 928         li->irq.pgm = irq->u.pgm;
 929         __set_bit(IRQ_PEND_PROG, &li->pending_irqs);
 930         return 0;
 931 }
 932
 933 int kvm_s390_inject_program_int(struct kvm_vcpu *vcpu, u16 code)
 934 {
 935         struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
 936         struct kvm_s390_irq irq;
 937
 938         VCPU_EVENT(vcpu, 3, "inject: program check %d (from kernel)", code);
 939         trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_PROGRAM_INT, code,
 940                                    0, 1);
 941         spin_lock(&li->lock);
 942         irq.u.pgm.code = code;
 943         __inject_prog(vcpu, &irq);
 944         BUG_ON(waitqueue_active(li->wq));
 945         spin_unlock(&li->lock);
 946         return 0;
 947 }
 948
 949 int kvm_s390_inject_prog_irq(struct kvm_vcpu *vcpu,
 950                              struct kvm_s390_pgm_info *pgm_info)
 951 {
 952         struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
 953         struct kvm_s390_irq irq;
 954         int rc;
 955
 956         VCPU_EVENT(vcpu, 3, "inject: prog irq %d (from kernel)",
 957                    pgm_info->code);
 958         trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_PROGRAM_INT,
 959                                    pgm_info->code, 0, 1);
 960         spin_lock(&li->lock);
 961         irq.u.pgm = *pgm_info;
 962         rc = __inject_prog(vcpu, &irq);
 963         BUG_ON(waitqueue_active(li->wq));
 964         spin_unlock(&li->lock);
 965         return rc;
 966 }
 967
 968 static int __inject_pfault_init(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
 969 {
 970         struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
 971
 972         VCPU_EVENT(vcpu, 3, "inject: external irq params:%x, params2:%llx",
 973                    irq->u.ext.ext_params, irq->u.ext.ext_params2);
 974         trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_PFAULT_INIT,
 975                                    irq->u.ext.ext_params,
 976                                    irq->u.ext.ext_params2, 2);
 977
 978         li->irq.ext = irq->u.ext;
 979         set_bit(IRQ_PEND_PFAULT_INIT, &li->pending_irqs);
 980         atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
 981         return 0;
 982 }
 983
 984 int __inject_extcall(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
 985 {
 986         struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
 987         struct kvm_s390_extcall_info *extcall = &li->irq.extcall;
 988
 989         VCPU_EVENT(vcpu, 3, "inject: external call source-cpu:%u",
 990                    irq->u.extcall.code);
 991         trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_EXTERNAL_CALL,
 992                                    irq->u.extcall.code, 0, 2);
 993
 994         *extcall = irq->u.extcall;
 995         __set_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs);
 996         atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
 997         return 0;
 998 }
 999
1000 static int __inject_set_prefix(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
1001 {
1002         struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1003         struct kvm_s390_prefix_info *prefix = &li->irq.prefix;
1004
1005         VCPU_EVENT(vcpu, 3, "inject: set prefix to %x (from user)",
1006                    prefix->address);
1007         trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_SIGP_SET_PREFIX,
1008                                    prefix->address, 0, 2);
1009
1010         *prefix = irq->u.prefix;
1011         set_bit(IRQ_PEND_SET_PREFIX, &li->pending_irqs);
1012         return 0;
1013 }
1014
1015 static int __inject_sigp_stop(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
1016 {
1017         struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1018
1019         trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_SIGP_STOP, 0, 0, 2);
1020
1021         li->action_bits |= ACTION_STOP_ON_STOP;
1022         set_bit(IRQ_PEND_SIGP_STOP, &li->pending_irqs);
1023         return 0;
1024 }
1025
1026 static int __inject_sigp_restart(struct kvm_vcpu *vcpu,
1027                                  struct kvm_s390_irq *irq)
1028 {
1029         struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1030
1031         VCPU_EVENT(vcpu, 3, "inject: restart type %llx", irq->type);
1032         trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_RESTART, 0, 0, 2);
1033
1034         set_bit(IRQ_PEND_RESTART, &li->pending_irqs);
1035         return 0;
1036 }
1037
1038 static int __inject_sigp_emergency(struct kvm_vcpu *vcpu,
1039                                    struct kvm_s390_irq *irq)
1040 {
1041         struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1042         struct kvm_s390_emerg_info *emerg = &li->irq.emerg;
1043
1044         VCPU_EVENT(vcpu, 3, "inject: emergency %u\n",
1045                    irq->u.emerg.code);
1046         trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_EMERGENCY,
1047                                    emerg->code, 0, 2);
1048
1049         set_bit(emerg->code, li->sigp_emerg_pending);
1050         set_bit(IRQ_PEND_EXT_EMERGENCY, &li->pending_irqs);
1051         atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
1052         return 0;
1053 }
1054
1055 static int __inject_mchk(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
1056 {
1057         struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1058         struct kvm_s390_mchk_info *mchk = &li->irq.mchk;
1059
1060         VCPU_EVENT(vcpu, 5, "inject: machine check parm64:%llx",
1061                    mchk->mcic);
1062         trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_MCHK, 0,
1063                                    mchk->mcic, 2);
1064
1065         /*
1066          * Combine mcic with previously injected machine checks and
1067          * indicate them all together as described in the Principles
1068          * of Operation, Chapter 11, Interruption action
1069          */
1070         mchk->mcic |= irq->u.mchk.mcic;
1071         if (mchk->mcic & MCHK_EX_MASK)
1072                 set_bit(IRQ_PEND_MCHK_EX, &li->pending_irqs);
1073         else if (mchk->mcic & MCHK_REP_MASK)
1074                 set_bit(IRQ_PEND_MCHK_REP,  &li->pending_irqs);
1075         return 0;
1076 }
1077
1078 static int __inject_ckc(struct kvm_vcpu *vcpu)
1079 {
1080         struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1081
1082         VCPU_EVENT(vcpu, 3, "inject: type %x", KVM_S390_INT_CLOCK_COMP);
1083         trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_CLOCK_COMP,
1084                                    0, 0, 2);
1085
1086         set_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs);
1087         atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
1088         return 0;
1089 }
1090
1091 static int __inject_cpu_timer(struct kvm_vcpu *vcpu)
1092 {
1093         struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1094
1095         VCPU_EVENT(vcpu, 3, "inject: type %x", KVM_S390_INT_CPU_TIMER);
1096         trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_CPU_TIMER,
1097                                    0, 0, 2);
1098
1099         set_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs);
1100         atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
1101         return 0;
1102 }
1103
1104
1105 struct kvm_s390_interrupt_info *kvm_s390_get_io_int(struct kvm *kvm,
1106                                                     u64 cr6, u64 schid)
1107 {
1108         struct kvm_s390_float_interrupt *fi;
1109         struct kvm_s390_interrupt_info *inti, *iter;
1110
1111         if ((!schid && !cr6) || (schid && cr6))
1112                 return NULL;
1113         mutex_lock(&kvm->lock);
1114         fi = &kvm->arch.float_int;
1115         spin_lock(&fi->lock);
1116         inti = NULL;
1117         list_for_each_entry(iter, &fi->list, list) {
1118                 if (!is_ioint(iter->type))
1119                         continue;
1120                 if (cr6 &&
1121                     ((cr6 & int_word_to_isc_bits(iter->io.io_int_word)) == 0))
1122                         continue;
1123                 if (schid) {
1124                         if (((schid & 0x00000000ffff0000) >> 16) !=
1125                             iter->io.subchannel_id)
1126                                 continue;
1127                         if ((schid & 0x000000000000ffff) !=
1128                             iter->io.subchannel_nr)
1129                                 continue;
1130                 }
1131                 inti = iter;
1132                 break;
1133         }
1134         if (inti) {
1135                 list_del_init(&inti->list);
1136                 fi->irq_count--;
1137         }
1138         if (list_empty(&fi->list))
1139                 atomic_set(&fi->active, 0);
1140         spin_unlock(&fi->lock);
1141         mutex_unlock(&kvm->lock);
1142         return inti;
1143 }
1144
1145 static int __inject_vm(struct kvm *kvm, struct kvm_s390_interrupt_info *inti)
1146 {
1147         struct kvm_s390_local_interrupt *li;
1148         struct kvm_s390_float_interrupt *fi;
1149         struct kvm_s390_interrupt_info *iter;
1150         struct kvm_vcpu *dst_vcpu = NULL;
1151         int sigcpu;
1152         int rc = 0;
1153
1154         mutex_lock(&kvm->lock);
1155         fi = &kvm->arch.float_int;
1156         spin_lock(&fi->lock);
1157         if (fi->irq_count >= KVM_S390_MAX_FLOAT_IRQS) {
1158                 rc = -EINVAL;
1159                 goto unlock_fi;
1160         }
1161         fi->irq_count++;
1162         if (!is_ioint(inti->type)) {
1163                 list_add_tail(&inti->list, &fi->list);
1164         } else {
1165                 u64 isc_bits = int_word_to_isc_bits(inti->io.io_int_word);
1166
1167                 /* Keep I/O interrupts sorted in isc order. */
1168                 list_for_each_entry(iter, &fi->list, list) {
1169                         if (!is_ioint(iter->type))
1170                                 continue;
1171                         if (int_word_to_isc_bits(iter->io.io_int_word)
1172                             <= isc_bits)
1173                                 continue;
1174                         break;
1175                 }
1176                 list_add_tail(&inti->list, &iter->list);
1177         }
1178         atomic_set(&fi->active, 1);
1179         sigcpu = find_first_bit(fi->idle_mask, KVM_MAX_VCPUS);
1180         if (sigcpu == KVM_MAX_VCPUS) {
1181                 do {
1182                         sigcpu = fi->next_rr_cpu++;
1183                         if (sigcpu == KVM_MAX_VCPUS)
1184                                 sigcpu = fi->next_rr_cpu = 0;
1185                 } while (kvm_get_vcpu(kvm, sigcpu) == NULL);
1186         }
1187         dst_vcpu = kvm_get_vcpu(kvm, sigcpu);
1188         li = &dst_vcpu->arch.local_int;
1189         spin_lock(&li->lock);
1190         switch (inti->type) {
1191         case KVM_S390_MCHK:
1192                 atomic_set_mask(CPUSTAT_STOP_INT, li->cpuflags);
1193                 break;
1194         case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
1195                 atomic_set_mask(CPUSTAT_IO_INT, li->cpuflags);
1196                 break;
1197         default:
1198                 atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
1199                 break;
1200         }
1201         spin_unlock(&li->lock);
1202         kvm_s390_vcpu_wakeup(kvm_get_vcpu(kvm, sigcpu));
1203 unlock_fi:
1204         spin_unlock(&fi->lock);
1205         mutex_unlock(&kvm->lock);
1206         return rc;
1207 }
1208
1209 int kvm_s390_inject_vm(struct kvm *kvm,
1210                        struct kvm_s390_interrupt *s390int)
1211 {
1212         struct kvm_s390_interrupt_info *inti;
1213
1214         inti = kzalloc(sizeof(*inti), GFP_KERNEL);
1215         if (!inti)
1216                 return -ENOMEM;
1217
1218         inti->type = s390int->type;
1219         switch (inti->type) {
1220         case KVM_S390_INT_VIRTIO:
1221                 VM_EVENT(kvm, 5, "inject: virtio parm:%x,parm64:%llx",
1222                          s390int->parm, s390int->parm64);
1223                 inti->ext.ext_params = s390int->parm;
1224                 inti->ext.ext_params2 = s390int->parm64;
1225                 break;
1226         case KVM_S390_INT_SERVICE:
1227                 VM_EVENT(kvm, 5, "inject: sclp parm:%x", s390int->parm);
1228                 inti->ext.ext_params = s390int->parm;
1229                 break;
1230         case KVM_S390_INT_PFAULT_DONE:
1231                 inti->type = s390int->type;
1232                 inti->ext.ext_params2 = s390int->parm64;
1233                 break;
1234         case KVM_S390_MCHK:
1235                 VM_EVENT(kvm, 5, "inject: machine check parm64:%llx",
1236                          s390int->parm64);
1237                 inti->mchk.cr14 = s390int->parm; /* upper bits are not used */
1238                 inti->mchk.mcic = s390int->parm64;
1239                 break;
1240         case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
1241                 if (inti->type & IOINT_AI_MASK)
1242                         VM_EVENT(kvm, 5, "%s", "inject: I/O (AI)");
1243                 else
1244                         VM_EVENT(kvm, 5, "inject: I/O css %x ss %x schid %04x",
1245                                  s390int->type & IOINT_CSSID_MASK,
1246                                  s390int->type & IOINT_SSID_MASK,
1247                                  s390int->type & IOINT_SCHID_MASK);
1248                 inti->io.subchannel_id = s390int->parm >> 16;
1249                 inti->io.subchannel_nr = s390int->parm & 0x0000ffffu;
1250                 inti->io.io_int_parm = s390int->parm64 >> 32;
1251                 inti->io.io_int_word = s390int->parm64 & 0x00000000ffffffffull;
1252                 break;
1253         default:
1254                 kfree(inti);
1255                 return -EINVAL;
1256         }
1257         trace_kvm_s390_inject_vm(s390int->type, s390int->parm, s390int->parm64,
1258                                  2);
1259
1260         return __inject_vm(kvm, inti);
1261 }
1262
1263 void kvm_s390_reinject_io_int(struct kvm *kvm,
1264                               struct kvm_s390_interrupt_info *inti)
1265 {
1266         __inject_vm(kvm, inti);
1267 }
1268
1269 int s390int_to_s390irq(struct kvm_s390_interrupt *s390int,
1270                        struct kvm_s390_irq *irq)
1271 {
1272         irq->type = s390int->type;
1273         switch (irq->type) {
1274         case KVM_S390_PROGRAM_INT:
1275                 if (s390int->parm & 0xffff0000)
1276                         return -EINVAL;
1277                 irq->u.pgm.code = s390int->parm;
1278                 break;
1279         case KVM_S390_SIGP_SET_PREFIX:
1280                 irq->u.prefix.address = s390int->parm;
1281                 break;
1282         case KVM_S390_INT_EXTERNAL_CALL:
1283                 if (irq->u.extcall.code & 0xffff0000)
1284                         return -EINVAL;
1285                 irq->u.extcall.code = s390int->parm;
1286                 break;
1287         case KVM_S390_INT_EMERGENCY:
1288                 if (irq->u.emerg.code & 0xffff0000)
1289                         return -EINVAL;
1290                 irq->u.emerg.code = s390int->parm;
1291                 break;
1292         case KVM_S390_MCHK:
1293                 irq->u.mchk.mcic = s390int->parm64;
1294                 break;
1295         }
1296         return 0;
1297 }
1298
1299 int kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
1300 {
1301         struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1302         int rc;
1303
1304         spin_lock(&li->lock);
1305         switch (irq->type) {
1306         case KVM_S390_PROGRAM_INT:
1307                 VCPU_EVENT(vcpu, 3, "inject: program check %d (from user)",
1308                            irq->u.pgm.code);
1309                 rc = __inject_prog(vcpu, irq);
1310                 break;
1311         case KVM_S390_SIGP_SET_PREFIX:
1312                 rc = __inject_set_prefix(vcpu, irq);
1313                 break;
1314         case KVM_S390_SIGP_STOP:
1315                 rc = __inject_sigp_stop(vcpu, irq);
1316                 break;
1317         case KVM_S390_RESTART:
1318                 rc = __inject_sigp_restart(vcpu, irq);
1319                 break;
1320         case KVM_S390_INT_CLOCK_COMP:
1321                 rc = __inject_ckc(vcpu);
1322                 break;
1323         case KVM_S390_INT_CPU_TIMER:
1324                 rc = __inject_cpu_timer(vcpu);
1325                 break;
1326         case KVM_S390_INT_EXTERNAL_CALL:
1327                 rc = __inject_extcall(vcpu, irq);
1328                 break;
1329         case KVM_S390_INT_EMERGENCY:
1330                 rc = __inject_sigp_emergency(vcpu, irq);
1331                 break;
1332         case KVM_S390_MCHK:
1333                 rc = __inject_mchk(vcpu, irq);
1334                 break;
1335         case KVM_S390_INT_PFAULT_INIT:
1336                 rc = __inject_pfault_init(vcpu, irq);
1337                 break;
1338         case KVM_S390_INT_VIRTIO:
1339         case KVM_S390_INT_SERVICE:
1340         case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
1341         default:
1342                 rc = -EINVAL;
1343         }
1344         spin_unlock(&li->lock);
1345         if (!rc)
1346                 kvm_s390_vcpu_wakeup(vcpu);
1347         return rc;
1348 }
1349
1350 void kvm_s390_clear_float_irqs(struct kvm *kvm)
1351 {
1352         struct kvm_s390_float_interrupt *fi;
1353         struct kvm_s390_interrupt_info  *n, *inti = NULL;
1354
1355         mutex_lock(&kvm->lock);
1356         fi = &kvm->arch.float_int;
1357         spin_lock(&fi->lock);
1358         list_for_each_entry_safe(inti, n, &fi->list, list) {
1359                 list_del(&inti->list);
1360                 kfree(inti);
1361         }
1362         fi->irq_count = 0;
1363         atomic_set(&fi->active, 0);
1364         spin_unlock(&fi->lock);
1365         mutex_unlock(&kvm->lock);
1366 }
1367
1368 static inline int copy_irq_to_user(struct kvm_s390_interrupt_info *inti,
1369                                    u8 *addr)
1370 {
1371         struct kvm_s390_irq __user *uptr = (struct kvm_s390_irq __user *) addr;
1372         struct kvm_s390_irq irq = {0};
1373
1374         irq.type = inti->type;
1375         switch (inti->type) {
1376         case KVM_S390_INT_PFAULT_INIT:
1377         case KVM_S390_INT_PFAULT_DONE:
1378         case KVM_S390_INT_VIRTIO:
1379         case KVM_S390_INT_SERVICE:
1380                 irq.u.ext = inti->ext;
1381                 break;
1382         case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
1383                 irq.u.io = inti->io;
1384                 break;
1385         case KVM_S390_MCHK:
1386                 irq.u.mchk = inti->mchk;
1387                 break;
1388         default:
1389                 return -EINVAL;
1390         }
1391
1392         if (copy_to_user(uptr, &irq, sizeof(irq)))
1393                 return -EFAULT;
1394
1395         return 0;
1396 }
1397
1398 static int get_all_floating_irqs(struct kvm *kvm, __u8 *buf, __u64 len)
1399 {
1400         struct kvm_s390_interrupt_info *inti;
1401         struct kvm_s390_float_interrupt *fi;
1402         int ret = 0;
1403         int n = 0;
1404
1405         mutex_lock(&kvm->lock);
1406         fi = &kvm->arch.float_int;
1407         spin_lock(&fi->lock);
1408
1409         list_for_each_entry(inti, &fi->list, list) {
1410                 if (len < sizeof(struct kvm_s390_irq)) {
1411                         /* signal userspace to try again */
1412                         ret = -ENOMEM;
1413                         break;
1414                 }
1415                 ret = copy_irq_to_user(inti, buf);
1416                 if (ret)
1417                         break;
1418                 buf += sizeof(struct kvm_s390_irq);
1419                 len -= sizeof(struct kvm_s390_irq);
1420                 n++;
1421         }
1422
1423         spin_unlock(&fi->lock);
1424         mutex_unlock(&kvm->lock);
1425
1426         return ret < 0 ? ret : n;
1427 }
1428
1429 static int flic_get_attr(struct kvm_device *dev, struct kvm_device_attr *attr)
1430 {
1431         int r;
1432
1433         switch (attr->group) {
1434         case KVM_DEV_FLIC_GET_ALL_IRQS:
1435                 r = get_all_floating_irqs(dev->kvm, (u8 *) attr->addr,
1436                                           attr->attr);
1437                 break;
1438         default:
1439                 r = -EINVAL;
1440         }
1441
1442         return r;
1443 }
1444
1445 static inline int copy_irq_from_user(struct kvm_s390_interrupt_info *inti,
1446                                      u64 addr)
1447 {
1448         struct kvm_s390_irq __user *uptr = (struct kvm_s390_irq __user *) addr;
1449         void *target = NULL;
1450         void __user *source;
1451         u64 size;
1452
1453         if (get_user(inti->type, (u64 __user *)addr))
1454                 return -EFAULT;
1455
1456         switch (inti->type) {
1457         case KVM_S390_INT_PFAULT_INIT:
1458         case KVM_S390_INT_PFAULT_DONE:
1459         case KVM_S390_INT_VIRTIO:
1460         case KVM_S390_INT_SERVICE:
1461                 target = (void *) &inti->ext;
1462                 source = &uptr->u.ext;
1463                 size = sizeof(inti->ext);
1464                 break;
1465         case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
1466                 target = (void *) &inti->io;
1467                 source = &uptr->u.io;
1468                 size = sizeof(inti->io);
1469                 break;
1470         case KVM_S390_MCHK:
1471                 target = (void *) &inti->mchk;
1472                 source = &uptr->u.mchk;
1473                 size = sizeof(inti->mchk);
1474                 break;
1475         default:
1476                 return -EINVAL;
1477         }
1478
1479         if (copy_from_user(target, source, size))
1480                 return -EFAULT;
1481
1482         return 0;
1483 }
1484
1485 static int enqueue_floating_irq(struct kvm_device *dev,
1486                                 struct kvm_device_attr *attr)
1487 {
1488         struct kvm_s390_interrupt_info *inti = NULL;
1489         int r = 0;
1490         int len = attr->attr;
1491
1492         if (len % sizeof(struct kvm_s390_irq) != 0)
1493                 return -EINVAL;
1494         else if (len > KVM_S390_FLIC_MAX_BUFFER)
1495                 return -EINVAL;
1496
1497         while (len >= sizeof(struct kvm_s390_irq)) {
1498                 inti = kzalloc(sizeof(*inti), GFP_KERNEL);
1499                 if (!inti)
1500                         return -ENOMEM;
1501
1502                 r = copy_irq_from_user(inti, attr->addr);
1503                 if (r) {
1504                         kfree(inti);
1505                         return r;
1506                 }
1507                 r = __inject_vm(dev->kvm, inti);
1508                 if (r) {
1509                         kfree(inti);
1510                         return r;
1511                 }
1512                 len -= sizeof(struct kvm_s390_irq);
1513                 attr->addr += sizeof(struct kvm_s390_irq);
1514         }
1515
1516         return r;
1517 }
1518
1519 static struct s390_io_adapter *get_io_adapter(struct kvm *kvm, unsigned int id)
1520 {
1521         if (id >= MAX_S390_IO_ADAPTERS)
1522                 return NULL;
1523         return kvm->arch.adapters[id];
1524 }
1525
1526 static int register_io_adapter(struct kvm_device *dev,
1527                                struct kvm_device_attr *attr)
1528 {
1529         struct s390_io_adapter *adapter;
1530         struct kvm_s390_io_adapter adapter_info;
1531
1532         if (copy_from_user(&adapter_info,
1533                            (void __user *)attr->addr, sizeof(adapter_info)))
1534                 return -EFAULT;
1535
1536         if ((adapter_info.id >= MAX_S390_IO_ADAPTERS) ||
1537             (dev->kvm->arch.adapters[adapter_info.id] != NULL))
1538                 return -EINVAL;
1539
1540         adapter = kzalloc(sizeof(*adapter), GFP_KERNEL);
1541         if (!adapter)
1542                 return -ENOMEM;
1543
1544         INIT_LIST_HEAD(&adapter->maps);
1545         init_rwsem(&adapter->maps_lock);
1546         atomic_set(&adapter->nr_maps, 0);
1547         adapter->id = adapter_info.id;
1548         adapter->isc = adapter_info.isc;
1549         adapter->maskable = adapter_info.maskable;
1550         adapter->masked = false;
1551         adapter->swap = adapter_info.swap;
1552         dev->kvm->arch.adapters[adapter->id] = adapter;
1553
1554         return 0;
1555 }
1556
1557 int kvm_s390_mask_adapter(struct kvm *kvm, unsigned int id, bool masked)
1558 {
1559         int ret;
1560         struct s390_io_adapter *adapter = get_io_adapter(kvm, id);
1561
1562         if (!adapter || !adapter->maskable)
1563                 return -EINVAL;
1564         ret = adapter->masked;
1565         adapter->masked = masked;
1566         return ret;
1567 }
1568
1569 static int kvm_s390_adapter_map(struct kvm *kvm, unsigned int id, __u64 addr)
1570 {
1571         struct s390_io_adapter *adapter = get_io_adapter(kvm, id);
1572         struct s390_map_info *map;
1573         int ret;
1574
1575         if (!adapter || !addr)
1576                 return -EINVAL;
1577
1578         map = kzalloc(sizeof(*map), GFP_KERNEL);
1579         if (!map) {
1580                 ret = -ENOMEM;
1581                 goto out;
1582         }
1583         INIT_LIST_HEAD(&map->list);
1584         map->guest_addr = addr;
1585         map->addr = gmap_translate(kvm->arch.gmap, addr);
1586         if (map->addr == -EFAULT) {
1587                 ret = -EFAULT;
1588                 goto out;
1589         }
1590         ret = get_user_pages_fast(map->addr, 1, 1, &map->page);
1591         if (ret < 0)
1592                 goto out;
1593         BUG_ON(ret != 1);
1594         down_write(&adapter->maps_lock);
1595         if (atomic_inc_return(&adapter->nr_maps) < MAX_S390_ADAPTER_MAPS) {
1596                 list_add_tail(&map->list, &adapter->maps);
1597                 ret = 0;
1598         } else {
1599                 put_page(map->page);
1600                 ret = -EINVAL;
1601         }
1602         up_write(&adapter->maps_lock);
1603 out:
1604         if (ret)
1605                 kfree(map);
1606         return ret;
1607 }
1608
1609 static int kvm_s390_adapter_unmap(struct kvm *kvm, unsigned int id, __u64 addr)
1610 {
1611         struct s390_io_adapter *adapter = get_io_adapter(kvm, id);
1612         struct s390_map_info *map, *tmp;
1613         int found = 0;
1614
1615         if (!adapter || !addr)
1616                 return -EINVAL;
1617
1618         down_write(&adapter->maps_lock);
1619         list_for_each_entry_safe(map, tmp, &adapter->maps, list) {
1620                 if (map->guest_addr == addr) {
1621                         found = 1;
1622                         atomic_dec(&adapter->nr_maps);
1623                         list_del(&map->list);
1624                         put_page(map->page);
1625                         kfree(map);
1626                         break;
1627                 }
1628         }
1629         up_write(&adapter->maps_lock);
1630
1631         return found ? 0 : -EINVAL;
1632 }
1633
1634 void kvm_s390_destroy_adapters(struct kvm *kvm)
1635 {
1636         int i;
1637         struct s390_map_info *map, *tmp;
1638
1639         for (i = 0; i < MAX_S390_IO_ADAPTERS; i++) {
1640                 if (!kvm->arch.adapters[i])
1641                         continue;
1642                 list_for_each_entry_safe(map, tmp,
1643                                          &kvm->arch.adapters[i]->maps, list) {
1644                         list_del(&map->list);
1645                         put_page(map->page);
1646                         kfree(map);
1647                 }
1648                 kfree(kvm->arch.adapters[i]);
1649         }
1650 }
1651
1652 static int modify_io_adapter(struct kvm_device *dev,
1653                              struct kvm_device_attr *attr)
1654 {
1655         struct kvm_s390_io_adapter_req req;
1656         struct s390_io_adapter *adapter;
1657         int ret;
1658
1659         if (copy_from_user(&req, (void __user *)attr->addr, sizeof(req)))
1660                 return -EFAULT;
1661
1662         adapter = get_io_adapter(dev->kvm, req.id);
1663         if (!adapter)
1664                 return -EINVAL;
1665         switch (req.type) {
1666         case KVM_S390_IO_ADAPTER_MASK:
1667                 ret = kvm_s390_mask_adapter(dev->kvm, req.id, req.mask);
1668                 if (ret > 0)
1669                         ret = 0;
1670                 break;
1671         case KVM_S390_IO_ADAPTER_MAP:
1672                 ret = kvm_s390_adapter_map(dev->kvm, req.id, req.addr);
1673                 break;
1674         case KVM_S390_IO_ADAPTER_UNMAP:
1675                 ret = kvm_s390_adapter_unmap(dev->kvm, req.id, req.addr);
1676                 break;
1677         default:
1678                 ret = -EINVAL;
1679         }
1680
1681         return ret;
1682 }
1683
1684 static int flic_set_attr(struct kvm_device *dev, struct kvm_device_attr *attr)
1685 {
1686         int r = 0;
1687         unsigned int i;
1688         struct kvm_vcpu *vcpu;
1689
1690         switch (attr->group) {
1691         case KVM_DEV_FLIC_ENQUEUE:
1692                 r = enqueue_floating_irq(dev, attr);
1693                 break;
1694         case KVM_DEV_FLIC_CLEAR_IRQS:
1695                 kvm_s390_clear_float_irqs(dev->kvm);
1696                 break;
1697         case KVM_DEV_FLIC_APF_ENABLE:
1698                 dev->kvm->arch.gmap->pfault_enabled = 1;
1699                 break;
1700         case KVM_DEV_FLIC_APF_DISABLE_WAIT:
1701                 dev->kvm->arch.gmap->pfault_enabled = 0;
1702                 /*
1703                  * Make sure no async faults are in transition when
1704                  * clearing the queues. So we don't need to worry
1705                  * about late coming workers.
1706                  */
1707                 synchronize_srcu(&dev->kvm->srcu);
1708                 kvm_for_each_vcpu(i, vcpu, dev->kvm)
1709                         kvm_clear_async_pf_completion_queue(vcpu);
1710                 break;
1711         case KVM_DEV_FLIC_ADAPTER_REGISTER:
1712                 r = register_io_adapter(dev, attr);
1713                 break;
1714         case KVM_DEV_FLIC_ADAPTER_MODIFY:
1715                 r = modify_io_adapter(dev, attr);
1716                 break;
1717         default:
1718                 r = -EINVAL;
1719         }
1720
1721         return r;
1722 }
1723
1724 static int flic_create(struct kvm_device *dev, u32 type)
1725 {
1726         if (!dev)
1727                 return -EINVAL;
1728         if (dev->kvm->arch.flic)
1729                 return -EINVAL;
1730         dev->kvm->arch.flic = dev;
1731         return 0;
1732 }
1733
1734 static void flic_destroy(struct kvm_device *dev)
1735 {
1736         dev->kvm->arch.flic = NULL;
1737         kfree(dev);
1738 }
1739
1740 /* s390 floating irq controller (flic) */
1741 struct kvm_device_ops kvm_flic_ops = {
1742         .name = "kvm-flic",
1743         .get_attr = flic_get_attr,
1744         .set_attr = flic_set_attr,
1745         .create = flic_create,
1746         .destroy = flic_destroy,
1747 };
1748
1749 static unsigned long get_ind_bit(__u64 addr, unsigned long bit_nr, bool swap)
1750 {
1751         unsigned long bit;
1752
1753         bit = bit_nr + (addr % PAGE_SIZE) * 8;
1754
1755         return swap ? (bit ^ (BITS_PER_LONG - 1)) : bit;
1756 }
1757
1758 static struct s390_map_info *get_map_info(struct s390_io_adapter *adapter,
1759                                           u64 addr)
1760 {
1761         struct s390_map_info *map;
1762
1763         if (!adapter)
1764                 return NULL;
1765
1766         list_for_each_entry(map, &adapter->maps, list) {
1767                 if (map->guest_addr == addr)
1768                         return map;
1769         }
1770         return NULL;
1771 }
1772
1773 static int adapter_indicators_set(struct kvm *kvm,
1774                                   struct s390_io_adapter *adapter,
1775                                   struct kvm_s390_adapter_int *adapter_int)
1776 {
1777         unsigned long bit;
1778         int summary_set, idx;
1779         struct s390_map_info *info;
1780         void *map;
1781
1782         info = get_map_info(adapter, adapter_int->ind_addr);
1783         if (!info)
1784                 return -1;
1785         map = page_address(info->page);
1786         bit = get_ind_bit(info->addr, adapter_int->ind_offset, adapter->swap);
1787         set_bit(bit, map);
1788         idx = srcu_read_lock(&kvm->srcu);
1789         mark_page_dirty(kvm, info->guest_addr >> PAGE_SHIFT);
1790         set_page_dirty_lock(info->page);
1791         info = get_map_info(adapter, adapter_int->summary_addr);
1792         if (!info) {
1793                 srcu_read_unlock(&kvm->srcu, idx);
1794                 return -1;
1795         }
1796         map = page_address(info->page);
1797         bit = get_ind_bit(info->addr, adapter_int->summary_offset,
1798                           adapter->swap);
1799         summary_set = test_and_set_bit(bit, map);
1800         mark_page_dirty(kvm, info->guest_addr >> PAGE_SHIFT);
1801         set_page_dirty_lock(info->page);
1802         srcu_read_unlock(&kvm->srcu, idx);
1803         return summary_set ? 0 : 1;
1804 }
1805
1806 /*
1807  * < 0 - not injected due to error
1808  * = 0 - coalesced, summary indicator already active
1809  * > 0 - injected interrupt
1810  */
1811 static int set_adapter_int(struct kvm_kernel_irq_routing_entry *e,
1812                            struct kvm *kvm, int irq_source_id, int level,
1813                            bool line_status)
1814 {
1815         int ret;
1816         struct s390_io_adapter *adapter;
1817
1818         /* We're only interested in the 0->1 transition. */
1819         if (!level)
1820                 return 0;
1821         adapter = get_io_adapter(kvm, e->adapter.adapter_id);
1822         if (!adapter)
1823                 return -1;
1824         down_read(&adapter->maps_lock);
1825         ret = adapter_indicators_set(kvm, adapter, &e->adapter);
1826         up_read(&adapter->maps_lock);
1827         if ((ret > 0) && !adapter->masked) {
1828                 struct kvm_s390_interrupt s390int = {
1829                         .type = KVM_S390_INT_IO(1, 0, 0, 0),
1830                         .parm = 0,
1831                         .parm64 = (adapter->isc << 27) | 0x80000000,
1832                 };
1833                 ret = kvm_s390_inject_vm(kvm, &s390int);
1834                 if (ret == 0)
1835                         ret = 1;
1836         }
1837         return ret;
1838 }
1839
1840 int kvm_set_routing_entry(struct kvm_kernel_irq_routing_entry *e,
1841                           const struct kvm_irq_routing_entry *ue)
1842 {
1843         int ret;
1844
1845         switch (ue->type) {
1846         case KVM_IRQ_ROUTING_S390_ADAPTER:
1847                 e->set = set_adapter_int;
1848                 e->adapter.summary_addr = ue->u.adapter.summary_addr;
1849                 e->adapter.ind_addr = ue->u.adapter.ind_addr;
1850                 e->adapter.summary_offset = ue->u.adapter.summary_offset;
1851                 e->adapter.ind_offset = ue->u.adapter.ind_offset;
1852                 e->adapter.adapter_id = ue->u.adapter.adapter_id;
1853                 ret = 0;
1854                 break;
1855         default:
1856                 ret = -EINVAL;
1857         }
1858
1859         return ret;
1860 }
1861
1862 int kvm_set_msi(struct kvm_kernel_irq_routing_entry *e, struct kvm *kvm,
1863                 int irq_source_id, int level, bool line_status)
1864 {
1865         return -EINVAL;
1866 }