1 /* 2 * interrupt.c - handling kvm guest interrupts 3 * 4 * Copyright IBM Corp. 2008 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License (version 2 only) 8 * as published by the Free Software Foundation. 9 * 10 * Author(s): Carsten Otte <cotte@de.ibm.com> 11 */ 12 13 #include <linux/interrupt.h> 14 #include <linux/kvm_host.h> 15 #include <linux/hrtimer.h> 16 #include <linux/signal.h> 17 #include <linux/slab.h> 18 #include <asm/asm-offsets.h> 19 #include <asm/uaccess.h> 20 #include "kvm-s390.h" 21 #include "gaccess.h" 22 23 static int psw_extint_disabled(struct kvm_vcpu *vcpu) 24 { 25 return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_EXT); 26 } 27 28 static int psw_interrupts_disabled(struct kvm_vcpu *vcpu) 29 { 30 if ((vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PER) || 31 (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_IO) || 32 (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_EXT)) 33 return 0; 34 return 1; 35 } 36 37 static int __interrupt_is_deliverable(struct kvm_vcpu *vcpu, 38 struct kvm_s390_interrupt_info *inti) 39 { 40 switch (inti->type) { 41 case KVM_S390_INT_EMERGENCY: 42 if (psw_extint_disabled(vcpu)) 43 return 0; 44 if (vcpu->arch.sie_block->gcr[0] & 0x4000ul) 45 return 1; 46 return 0; 47 case KVM_S390_INT_SERVICE: 48 if (psw_extint_disabled(vcpu)) 49 return 0; 50 if (vcpu->arch.sie_block->gcr[0] & 0x200ul) 51 return 1; 52 return 0; 53 case KVM_S390_INT_VIRTIO: 54 if (psw_extint_disabled(vcpu)) 55 return 0; 56 if (vcpu->arch.sie_block->gcr[0] & 0x200ul) 57 return 1; 58 return 0; 59 case KVM_S390_PROGRAM_INT: 60 case KVM_S390_SIGP_STOP: 61 case KVM_S390_SIGP_SET_PREFIX: 62 case KVM_S390_RESTART: 63 return 1; 64 default: 65 BUG(); 66 } 67 return 0; 68 } 69 70 static void __set_cpu_idle(struct kvm_vcpu *vcpu) 71 { 72 BUG_ON(vcpu->vcpu_id > KVM_MAX_VCPUS - 1); 73 atomic_set_mask(CPUSTAT_WAIT, &vcpu->arch.sie_block->cpuflags); 74 set_bit(vcpu->vcpu_id, vcpu->arch.local_int.float_int->idle_mask); 75 } 76 77 static void __unset_cpu_idle(struct kvm_vcpu *vcpu) 78 { 79 BUG_ON(vcpu->vcpu_id > KVM_MAX_VCPUS - 1); 80 atomic_clear_mask(CPUSTAT_WAIT, &vcpu->arch.sie_block->cpuflags); 81 clear_bit(vcpu->vcpu_id, vcpu->arch.local_int.float_int->idle_mask); 82 } 83 84 static void __reset_intercept_indicators(struct kvm_vcpu *vcpu) 85 { 86 atomic_clear_mask(CPUSTAT_ECALL_PEND | 87 CPUSTAT_IO_INT | CPUSTAT_EXT_INT | CPUSTAT_STOP_INT, 88 &vcpu->arch.sie_block->cpuflags); 89 vcpu->arch.sie_block->lctl = 0x0000; 90 } 91 92 static void __set_cpuflag(struct kvm_vcpu *vcpu, u32 flag) 93 { 94 atomic_set_mask(flag, &vcpu->arch.sie_block->cpuflags); 95 } 96 97 static void __set_intercept_indicator(struct kvm_vcpu *vcpu, 98 struct kvm_s390_interrupt_info *inti) 99 { 100 switch (inti->type) { 101 case KVM_S390_INT_EMERGENCY: 102 case KVM_S390_INT_SERVICE: 103 case KVM_S390_INT_VIRTIO: 104 if (psw_extint_disabled(vcpu)) 105 __set_cpuflag(vcpu, CPUSTAT_EXT_INT); 106 else 107 vcpu->arch.sie_block->lctl |= LCTL_CR0; 108 break; 109 case KVM_S390_SIGP_STOP: 110 __set_cpuflag(vcpu, CPUSTAT_STOP_INT); 111 break; 112 default: 113 BUG(); 114 } 115 } 116 117 static void __do_deliver_interrupt(struct kvm_vcpu *vcpu, 118 struct kvm_s390_interrupt_info *inti) 119 { 120 const unsigned short table[] = { 2, 4, 4, 6 }; 121 int rc, exception = 0; 122 123 switch (inti->type) { 124 case KVM_S390_INT_EMERGENCY: 125 VCPU_EVENT(vcpu, 4, "%s", "interrupt: sigp emerg"); 126 vcpu->stat.deliver_emergency_signal++; 127 rc = put_guest_u16(vcpu, __LC_EXT_INT_CODE, 0x1201); 128 if (rc == -EFAULT) 129 exception = 1; 130 131 rc = put_guest_u16(vcpu, __LC_CPU_ADDRESS, inti->emerg.code); 132 if (rc == -EFAULT) 133 exception = 1; 134 135 rc = copy_to_guest(vcpu, __LC_EXT_OLD_PSW, 136 &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); 137 if (rc == -EFAULT) 138 exception = 1; 139 140 rc = copy_from_guest(vcpu, &vcpu->arch.sie_block->gpsw, 141 __LC_EXT_NEW_PSW, sizeof(psw_t)); 142 if (rc == -EFAULT) 143 exception = 1; 144 break; 145 146 case KVM_S390_INT_SERVICE: 147 VCPU_EVENT(vcpu, 4, "interrupt: sclp parm:%x", 148 inti->ext.ext_params); 149 vcpu->stat.deliver_service_signal++; 150 rc = put_guest_u16(vcpu, __LC_EXT_INT_CODE, 0x2401); 151 if (rc == -EFAULT) 152 exception = 1; 153 154 rc = copy_to_guest(vcpu, __LC_EXT_OLD_PSW, 155 &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); 156 if (rc == -EFAULT) 157 exception = 1; 158 159 rc = copy_from_guest(vcpu, &vcpu->arch.sie_block->gpsw, 160 __LC_EXT_NEW_PSW, sizeof(psw_t)); 161 if (rc == -EFAULT) 162 exception = 1; 163 164 rc = put_guest_u32(vcpu, __LC_EXT_PARAMS, inti->ext.ext_params); 165 if (rc == -EFAULT) 166 exception = 1; 167 break; 168 169 case KVM_S390_INT_VIRTIO: 170 VCPU_EVENT(vcpu, 4, "interrupt: virtio parm:%x,parm64:%llx", 171 inti->ext.ext_params, inti->ext.ext_params2); 172 vcpu->stat.deliver_virtio_interrupt++; 173 rc = put_guest_u16(vcpu, __LC_EXT_INT_CODE, 0x2603); 174 if (rc == -EFAULT) 175 exception = 1; 176 177 rc = put_guest_u16(vcpu, __LC_CPU_ADDRESS, 0x0d00); 178 if (rc == -EFAULT) 179 exception = 1; 180 181 rc = copy_to_guest(vcpu, __LC_EXT_OLD_PSW, 182 &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); 183 if (rc == -EFAULT) 184 exception = 1; 185 186 rc = copy_from_guest(vcpu, &vcpu->arch.sie_block->gpsw, 187 __LC_EXT_NEW_PSW, sizeof(psw_t)); 188 if (rc == -EFAULT) 189 exception = 1; 190 191 rc = put_guest_u32(vcpu, __LC_EXT_PARAMS, inti->ext.ext_params); 192 if (rc == -EFAULT) 193 exception = 1; 194 195 rc = put_guest_u64(vcpu, __LC_EXT_PARAMS2, 196 inti->ext.ext_params2); 197 if (rc == -EFAULT) 198 exception = 1; 199 break; 200 201 case KVM_S390_SIGP_STOP: 202 VCPU_EVENT(vcpu, 4, "%s", "interrupt: cpu stop"); 203 vcpu->stat.deliver_stop_signal++; 204 __set_intercept_indicator(vcpu, inti); 205 break; 206 207 case KVM_S390_SIGP_SET_PREFIX: 208 VCPU_EVENT(vcpu, 4, "interrupt: set prefix to %x", 209 inti->prefix.address); 210 vcpu->stat.deliver_prefix_signal++; 211 vcpu->arch.sie_block->prefix = inti->prefix.address; 212 vcpu->arch.sie_block->ihcpu = 0xffff; 213 break; 214 215 case KVM_S390_RESTART: 216 VCPU_EVENT(vcpu, 4, "%s", "interrupt: cpu restart"); 217 vcpu->stat.deliver_restart_signal++; 218 rc = copy_to_guest(vcpu, offsetof(struct _lowcore, 219 restart_old_psw), &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); 220 if (rc == -EFAULT) 221 exception = 1; 222 223 rc = copy_from_guest(vcpu, &vcpu->arch.sie_block->gpsw, 224 offsetof(struct _lowcore, restart_psw), sizeof(psw_t)); 225 if (rc == -EFAULT) 226 exception = 1; 227 break; 228 229 case KVM_S390_PROGRAM_INT: 230 VCPU_EVENT(vcpu, 4, "interrupt: pgm check code:%x, ilc:%x", 231 inti->pgm.code, 232 table[vcpu->arch.sie_block->ipa >> 14]); 233 vcpu->stat.deliver_program_int++; 234 rc = put_guest_u16(vcpu, __LC_PGM_INT_CODE, inti->pgm.code); 235 if (rc == -EFAULT) 236 exception = 1; 237 238 rc = put_guest_u16(vcpu, __LC_PGM_ILC, 239 table[vcpu->arch.sie_block->ipa >> 14]); 240 if (rc == -EFAULT) 241 exception = 1; 242 243 rc = copy_to_guest(vcpu, __LC_PGM_OLD_PSW, 244 &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); 245 if (rc == -EFAULT) 246 exception = 1; 247 248 rc = copy_from_guest(vcpu, &vcpu->arch.sie_block->gpsw, 249 __LC_PGM_NEW_PSW, sizeof(psw_t)); 250 if (rc == -EFAULT) 251 exception = 1; 252 break; 253 254 default: 255 BUG(); 256 } 257 if (exception) { 258 printk("kvm: The guest lowcore is not mapped during interrupt " 259 "delivery, killing userspace\n"); 260 do_exit(SIGKILL); 261 } 262 } 263 264 static int __try_deliver_ckc_interrupt(struct kvm_vcpu *vcpu) 265 { 266 int rc, exception = 0; 267 268 if (psw_extint_disabled(vcpu)) 269 return 0; 270 if (!(vcpu->arch.sie_block->gcr[0] & 0x800ul)) 271 return 0; 272 rc = put_guest_u16(vcpu, __LC_EXT_INT_CODE, 0x1004); 273 if (rc == -EFAULT) 274 exception = 1; 275 rc = copy_to_guest(vcpu, __LC_EXT_OLD_PSW, 276 &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); 277 if (rc == -EFAULT) 278 exception = 1; 279 rc = copy_from_guest(vcpu, &vcpu->arch.sie_block->gpsw, 280 __LC_EXT_NEW_PSW, sizeof(psw_t)); 281 if (rc == -EFAULT) 282 exception = 1; 283 if (exception) { 284 printk("kvm: The guest lowcore is not mapped during interrupt " 285 "delivery, killing userspace\n"); 286 do_exit(SIGKILL); 287 } 288 return 1; 289 } 290 291 static int kvm_cpu_has_interrupt(struct kvm_vcpu *vcpu) 292 { 293 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; 294 struct kvm_s390_float_interrupt *fi = vcpu->arch.local_int.float_int; 295 struct kvm_s390_interrupt_info *inti; 296 int rc = 0; 297 298 if (atomic_read(&li->active)) { 299 spin_lock_bh(&li->lock); 300 list_for_each_entry(inti, &li->list, list) 301 if (__interrupt_is_deliverable(vcpu, inti)) { 302 rc = 1; 303 break; 304 } 305 spin_unlock_bh(&li->lock); 306 } 307 308 if ((!rc) && atomic_read(&fi->active)) { 309 spin_lock(&fi->lock); 310 list_for_each_entry(inti, &fi->list, list) 311 if (__interrupt_is_deliverable(vcpu, inti)) { 312 rc = 1; 313 break; 314 } 315 spin_unlock(&fi->lock); 316 } 317 318 if ((!rc) && (vcpu->arch.sie_block->ckc < 319 get_clock() + vcpu->arch.sie_block->epoch)) { 320 if ((!psw_extint_disabled(vcpu)) && 321 (vcpu->arch.sie_block->gcr[0] & 0x800ul)) 322 rc = 1; 323 } 324 325 return rc; 326 } 327 328 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu) 329 { 330 return 0; 331 } 332 333 int kvm_s390_handle_wait(struct kvm_vcpu *vcpu) 334 { 335 u64 now, sltime; 336 DECLARE_WAITQUEUE(wait, current); 337 338 vcpu->stat.exit_wait_state++; 339 if (kvm_cpu_has_interrupt(vcpu)) 340 return 0; 341 342 __set_cpu_idle(vcpu); 343 spin_lock_bh(&vcpu->arch.local_int.lock); 344 vcpu->arch.local_int.timer_due = 0; 345 spin_unlock_bh(&vcpu->arch.local_int.lock); 346 347 if (psw_interrupts_disabled(vcpu)) { 348 VCPU_EVENT(vcpu, 3, "%s", "disabled wait"); 349 __unset_cpu_idle(vcpu); 350 return -EOPNOTSUPP; /* disabled wait */ 351 } 352 353 if (psw_extint_disabled(vcpu) || 354 (!(vcpu->arch.sie_block->gcr[0] & 0x800ul))) { 355 VCPU_EVENT(vcpu, 3, "%s", "enabled wait w/o timer"); 356 goto no_timer; 357 } 358 359 now = get_clock() + vcpu->arch.sie_block->epoch; 360 if (vcpu->arch.sie_block->ckc < now) { 361 __unset_cpu_idle(vcpu); 362 return 0; 363 } 364 365 sltime = ((vcpu->arch.sie_block->ckc - now)*125)>>9; 366 367 hrtimer_start(&vcpu->arch.ckc_timer, ktime_set (0, sltime) , HRTIMER_MODE_REL); 368 VCPU_EVENT(vcpu, 5, "enabled wait via clock comparator: %llx ns", sltime); 369 no_timer: 370 spin_lock(&vcpu->arch.local_int.float_int->lock); 371 spin_lock_bh(&vcpu->arch.local_int.lock); 372 add_wait_queue(&vcpu->arch.local_int.wq, &wait); 373 while (list_empty(&vcpu->arch.local_int.list) && 374 list_empty(&vcpu->arch.local_int.float_int->list) && 375 (!vcpu->arch.local_int.timer_due) && 376 !signal_pending(current)) { 377 set_current_state(TASK_INTERRUPTIBLE); 378 spin_unlock_bh(&vcpu->arch.local_int.lock); 379 spin_unlock(&vcpu->arch.local_int.float_int->lock); 380 vcpu_put(vcpu); 381 schedule(); 382 vcpu_load(vcpu); 383 spin_lock(&vcpu->arch.local_int.float_int->lock); 384 spin_lock_bh(&vcpu->arch.local_int.lock); 385 } 386 __unset_cpu_idle(vcpu); 387 __set_current_state(TASK_RUNNING); 388 remove_wait_queue(&vcpu->arch.local_int.wq, &wait); 389 spin_unlock_bh(&vcpu->arch.local_int.lock); 390 spin_unlock(&vcpu->arch.local_int.float_int->lock); 391 hrtimer_try_to_cancel(&vcpu->arch.ckc_timer); 392 return 0; 393 } 394 395 void kvm_s390_tasklet(unsigned long parm) 396 { 397 struct kvm_vcpu *vcpu = (struct kvm_vcpu *) parm; 398 399 spin_lock(&vcpu->arch.local_int.lock); 400 vcpu->arch.local_int.timer_due = 1; 401 if (waitqueue_active(&vcpu->arch.local_int.wq)) 402 wake_up_interruptible(&vcpu->arch.local_int.wq); 403 spin_unlock(&vcpu->arch.local_int.lock); 404 } 405 406 /* 407 * low level hrtimer wake routine. Because this runs in hardirq context 408 * we schedule a tasklet to do the real work. 409 */ 410 enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer) 411 { 412 struct kvm_vcpu *vcpu; 413 414 vcpu = container_of(timer, struct kvm_vcpu, arch.ckc_timer); 415 tasklet_schedule(&vcpu->arch.tasklet); 416 417 return HRTIMER_NORESTART; 418 } 419 420 void kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu) 421 { 422 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; 423 struct kvm_s390_float_interrupt *fi = vcpu->arch.local_int.float_int; 424 struct kvm_s390_interrupt_info *n, *inti = NULL; 425 int deliver; 426 427 __reset_intercept_indicators(vcpu); 428 if (atomic_read(&li->active)) { 429 do { 430 deliver = 0; 431 spin_lock_bh(&li->lock); 432 list_for_each_entry_safe(inti, n, &li->list, list) { 433 if (__interrupt_is_deliverable(vcpu, inti)) { 434 list_del(&inti->list); 435 deliver = 1; 436 break; 437 } 438 __set_intercept_indicator(vcpu, inti); 439 } 440 if (list_empty(&li->list)) 441 atomic_set(&li->active, 0); 442 spin_unlock_bh(&li->lock); 443 if (deliver) { 444 __do_deliver_interrupt(vcpu, inti); 445 kfree(inti); 446 } 447 } while (deliver); 448 } 449 450 if ((vcpu->arch.sie_block->ckc < 451 get_clock() + vcpu->arch.sie_block->epoch)) 452 __try_deliver_ckc_interrupt(vcpu); 453 454 if (atomic_read(&fi->active)) { 455 do { 456 deliver = 0; 457 spin_lock(&fi->lock); 458 list_for_each_entry_safe(inti, n, &fi->list, list) { 459 if (__interrupt_is_deliverable(vcpu, inti)) { 460 list_del(&inti->list); 461 deliver = 1; 462 break; 463 } 464 __set_intercept_indicator(vcpu, inti); 465 } 466 if (list_empty(&fi->list)) 467 atomic_set(&fi->active, 0); 468 spin_unlock(&fi->lock); 469 if (deliver) { 470 __do_deliver_interrupt(vcpu, inti); 471 kfree(inti); 472 } 473 } while (deliver); 474 } 475 } 476 477 int kvm_s390_inject_program_int(struct kvm_vcpu *vcpu, u16 code) 478 { 479 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; 480 struct kvm_s390_interrupt_info *inti; 481 482 inti = kzalloc(sizeof(*inti), GFP_KERNEL); 483 if (!inti) 484 return -ENOMEM; 485 486 inti->type = KVM_S390_PROGRAM_INT; 487 inti->pgm.code = code; 488 489 VCPU_EVENT(vcpu, 3, "inject: program check %d (from kernel)", code); 490 spin_lock_bh(&li->lock); 491 list_add(&inti->list, &li->list); 492 atomic_set(&li->active, 1); 493 BUG_ON(waitqueue_active(&li->wq)); 494 spin_unlock_bh(&li->lock); 495 return 0; 496 } 497 498 int kvm_s390_inject_vm(struct kvm *kvm, 499 struct kvm_s390_interrupt *s390int) 500 { 501 struct kvm_s390_local_interrupt *li; 502 struct kvm_s390_float_interrupt *fi; 503 struct kvm_s390_interrupt_info *inti; 504 int sigcpu; 505 506 inti = kzalloc(sizeof(*inti), GFP_KERNEL); 507 if (!inti) 508 return -ENOMEM; 509 510 switch (s390int->type) { 511 case KVM_S390_INT_VIRTIO: 512 VM_EVENT(kvm, 5, "inject: virtio parm:%x,parm64:%llx", 513 s390int->parm, s390int->parm64); 514 inti->type = s390int->type; 515 inti->ext.ext_params = s390int->parm; 516 inti->ext.ext_params2 = s390int->parm64; 517 break; 518 case KVM_S390_INT_SERVICE: 519 VM_EVENT(kvm, 5, "inject: sclp parm:%x", s390int->parm); 520 inti->type = s390int->type; 521 inti->ext.ext_params = s390int->parm; 522 break; 523 case KVM_S390_PROGRAM_INT: 524 case KVM_S390_SIGP_STOP: 525 case KVM_S390_INT_EMERGENCY: 526 default: 527 kfree(inti); 528 return -EINVAL; 529 } 530 531 mutex_lock(&kvm->lock); 532 fi = &kvm->arch.float_int; 533 spin_lock(&fi->lock); 534 list_add_tail(&inti->list, &fi->list); 535 atomic_set(&fi->active, 1); 536 sigcpu = find_first_bit(fi->idle_mask, KVM_MAX_VCPUS); 537 if (sigcpu == KVM_MAX_VCPUS) { 538 do { 539 sigcpu = fi->next_rr_cpu++; 540 if (sigcpu == KVM_MAX_VCPUS) 541 sigcpu = fi->next_rr_cpu = 0; 542 } while (fi->local_int[sigcpu] == NULL); 543 } 544 li = fi->local_int[sigcpu]; 545 spin_lock_bh(&li->lock); 546 atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags); 547 if (waitqueue_active(&li->wq)) 548 wake_up_interruptible(&li->wq); 549 spin_unlock_bh(&li->lock); 550 spin_unlock(&fi->lock); 551 mutex_unlock(&kvm->lock); 552 return 0; 553 } 554 555 int kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu, 556 struct kvm_s390_interrupt *s390int) 557 { 558 struct kvm_s390_local_interrupt *li; 559 struct kvm_s390_interrupt_info *inti; 560 561 inti = kzalloc(sizeof(*inti), GFP_KERNEL); 562 if (!inti) 563 return -ENOMEM; 564 565 switch (s390int->type) { 566 case KVM_S390_PROGRAM_INT: 567 if (s390int->parm & 0xffff0000) { 568 kfree(inti); 569 return -EINVAL; 570 } 571 inti->type = s390int->type; 572 inti->pgm.code = s390int->parm; 573 VCPU_EVENT(vcpu, 3, "inject: program check %d (from user)", 574 s390int->parm); 575 break; 576 case KVM_S390_SIGP_SET_PREFIX: 577 inti->prefix.address = s390int->parm; 578 inti->type = s390int->type; 579 VCPU_EVENT(vcpu, 3, "inject: set prefix to %x (from user)", 580 s390int->parm); 581 break; 582 case KVM_S390_SIGP_STOP: 583 case KVM_S390_RESTART: 584 case KVM_S390_INT_EMERGENCY: 585 VCPU_EVENT(vcpu, 3, "inject: type %x", s390int->type); 586 inti->type = s390int->type; 587 break; 588 case KVM_S390_INT_VIRTIO: 589 case KVM_S390_INT_SERVICE: 590 default: 591 kfree(inti); 592 return -EINVAL; 593 } 594 595 mutex_lock(&vcpu->kvm->lock); 596 li = &vcpu->arch.local_int; 597 spin_lock_bh(&li->lock); 598 if (inti->type == KVM_S390_PROGRAM_INT) 599 list_add(&inti->list, &li->list); 600 else 601 list_add_tail(&inti->list, &li->list); 602 atomic_set(&li->active, 1); 603 if (inti->type == KVM_S390_SIGP_STOP) 604 li->action_bits |= ACTION_STOP_ON_STOP; 605 atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags); 606 if (waitqueue_active(&li->wq)) 607 wake_up_interruptible(&vcpu->arch.local_int.wq); 608 spin_unlock_bh(&li->lock); 609 mutex_unlock(&vcpu->kvm->lock); 610 return 0; 611 } 612