1// SPDX-License-Identifier: GPL-2.0 2/* 3 * Copyright (C) 2021 Western Digital Corporation or its affiliates. 4 * Copyright (C) 2022 Ventana Micro Systems Inc. 5 * 6 * Authors: 7 * Anup Patel <apatel@ventanamicro.com> 8 */ 9 10#include <linux/kvm_host.h> 11#include <linux/math.h> 12#include <linux/spinlock.h> 13#include <linux/swab.h> 14#include <kvm/iodev.h> 15#include <asm/kvm_aia_aplic.h> 16 17struct aplic_irq { 18 raw_spinlock_t lock; 19 u32 sourcecfg; 20 u32 state; 21#define APLIC_IRQ_STATE_PENDING BIT(0) 22#define APLIC_IRQ_STATE_ENABLED BIT(1) 23#define APLIC_IRQ_STATE_ENPEND (APLIC_IRQ_STATE_PENDING | \ 24 APLIC_IRQ_STATE_ENABLED) 25#define APLIC_IRQ_STATE_INPUT BIT(8) 26 u32 target; 27}; 28 29struct aplic { 30 struct kvm_io_device iodev; 31 32 u32 domaincfg; 33 u32 genmsi; 34 35 u32 nr_irqs; 36 u32 nr_words; 37 struct aplic_irq *irqs; 38}; 39 40static u32 aplic_read_sourcecfg(struct aplic *aplic, u32 irq) 41{ 42 u32 ret; 43 unsigned long flags; 44 struct aplic_irq *irqd; 45 46 if (!irq || aplic->nr_irqs <= irq) 47 return 0; 48 irqd = &aplic->irqs[irq]; 49 50 raw_spin_lock_irqsave(&irqd->lock, flags); 51 ret = irqd->sourcecfg; 52 raw_spin_unlock_irqrestore(&irqd->lock, flags); 53 54 return ret; 55} 56 57static void aplic_write_sourcecfg(struct aplic *aplic, u32 irq, u32 val) 58{ 59 unsigned long flags; 60 struct aplic_irq *irqd; 61 62 if (!irq || aplic->nr_irqs <= irq) 63 return; 64 irqd = &aplic->irqs[irq]; 65 66 if (val & APLIC_SOURCECFG_D) 67 val = 0; 68 else 69 val &= APLIC_SOURCECFG_SM_MASK; 70 71 raw_spin_lock_irqsave(&irqd->lock, flags); 72 irqd->sourcecfg = val; 73 raw_spin_unlock_irqrestore(&irqd->lock, flags); 74} 75 76static u32 aplic_read_target(struct aplic *aplic, u32 irq) 77{ 78 u32 ret; 79 unsigned long flags; 80 struct aplic_irq *irqd; 81 82 if (!irq || aplic->nr_irqs <= irq) 83 return 0; 84 irqd = &aplic->irqs[irq]; 85 86 raw_spin_lock_irqsave(&irqd->lock, flags); 87 ret = irqd->target; 88 raw_spin_unlock_irqrestore(&irqd->lock, flags); 89 90 return ret; 91} 92 93static void aplic_write_target(struct aplic *aplic, u32 irq, u32 val) 94{ 95 unsigned long flags; 96 struct aplic_irq *irqd; 97 98 if (!irq || aplic->nr_irqs <= irq) 99 return; 100 irqd = &aplic->irqs[irq]; 101 102 val &= APLIC_TARGET_EIID_MASK | 103 (APLIC_TARGET_HART_IDX_MASK << APLIC_TARGET_HART_IDX_SHIFT) | 104 (APLIC_TARGET_GUEST_IDX_MASK << APLIC_TARGET_GUEST_IDX_SHIFT); 105 106 raw_spin_lock_irqsave(&irqd->lock, flags); 107 irqd->target = val; 108 raw_spin_unlock_irqrestore(&irqd->lock, flags); 109} 110 111static bool aplic_read_pending(struct aplic *aplic, u32 irq) 112{ 113 bool ret; 114 unsigned long flags; 115 struct aplic_irq *irqd; 116 117 if (!irq || aplic->nr_irqs <= irq) 118 return false; 119 irqd = &aplic->irqs[irq]; 120 121 raw_spin_lock_irqsave(&irqd->lock, flags); 122 ret = (irqd->state & APLIC_IRQ_STATE_PENDING) ? true : false; 123 raw_spin_unlock_irqrestore(&irqd->lock, flags); 124 125 return ret; 126} 127 128static void aplic_write_pending(struct aplic *aplic, u32 irq, bool pending) 129{ 130 unsigned long flags, sm; 131 struct aplic_irq *irqd; 132 133 if (!irq || aplic->nr_irqs <= irq) 134 return; 135 irqd = &aplic->irqs[irq]; 136 137 raw_spin_lock_irqsave(&irqd->lock, flags); 138 139 sm = irqd->sourcecfg & APLIC_SOURCECFG_SM_MASK; 140 if (sm == APLIC_SOURCECFG_SM_INACTIVE) 141 goto skip_write_pending; 142 143 if (sm == APLIC_SOURCECFG_SM_LEVEL_HIGH || 144 sm == APLIC_SOURCECFG_SM_LEVEL_LOW) { 145 if (!pending) 146 goto skip_write_pending; 147 if ((irqd->state & APLIC_IRQ_STATE_INPUT) && 148 sm == APLIC_SOURCECFG_SM_LEVEL_LOW) 149 goto skip_write_pending; 150 if (!(irqd->state & APLIC_IRQ_STATE_INPUT) && 151 sm == APLIC_SOURCECFG_SM_LEVEL_HIGH) 152 goto skip_write_pending; 153 } 154 155 if (pending) 156 irqd->state |= APLIC_IRQ_STATE_PENDING; 157 else 158 irqd->state &= ~APLIC_IRQ_STATE_PENDING; 159 160skip_write_pending: 161 raw_spin_unlock_irqrestore(&irqd->lock, flags); 162} 163 164static bool aplic_read_enabled(struct aplic *aplic, u32 irq) 165{ 166 bool ret; 167 unsigned long flags; 168 struct aplic_irq *irqd; 169 170 if (!irq || aplic->nr_irqs <= irq) 171 return false; 172 irqd = &aplic->irqs[irq]; 173 174 raw_spin_lock_irqsave(&irqd->lock, flags); 175 ret = (irqd->state & APLIC_IRQ_STATE_ENABLED) ? true : false; 176 raw_spin_unlock_irqrestore(&irqd->lock, flags); 177 178 return ret; 179} 180 181static void aplic_write_enabled(struct aplic *aplic, u32 irq, bool enabled) 182{ 183 unsigned long flags; 184 struct aplic_irq *irqd; 185 186 if (!irq || aplic->nr_irqs <= irq) 187 return; 188 irqd = &aplic->irqs[irq]; 189 190 raw_spin_lock_irqsave(&irqd->lock, flags); 191 if (enabled) 192 irqd->state |= APLIC_IRQ_STATE_ENABLED; 193 else 194 irqd->state &= ~APLIC_IRQ_STATE_ENABLED; 195 raw_spin_unlock_irqrestore(&irqd->lock, flags); 196} 197 198static bool aplic_read_input(struct aplic *aplic, u32 irq) 199{ 200 u32 sourcecfg, sm, raw_input, irq_inverted; 201 struct aplic_irq *irqd; 202 unsigned long flags; 203 bool ret = false; 204 205 if (!irq || aplic->nr_irqs <= irq) 206 return false; 207 irqd = &aplic->irqs[irq]; 208 209 raw_spin_lock_irqsave(&irqd->lock, flags); 210 211 sourcecfg = irqd->sourcecfg; 212 if (sourcecfg & APLIC_SOURCECFG_D) 213 goto skip; 214 215 sm = sourcecfg & APLIC_SOURCECFG_SM_MASK; 216 if (sm == APLIC_SOURCECFG_SM_INACTIVE) 217 goto skip; 218 219 raw_input = (irqd->state & APLIC_IRQ_STATE_INPUT) ? 1 : 0; 220 irq_inverted = (sm == APLIC_SOURCECFG_SM_LEVEL_LOW || 221 sm == APLIC_SOURCECFG_SM_EDGE_FALL) ? 1 : 0; 222 ret = !!(raw_input ^ irq_inverted); 223 224skip: 225 raw_spin_unlock_irqrestore(&irqd->lock, flags); 226 227 return ret; 228} 229 230static void aplic_inject_msi(struct kvm *kvm, u32 irq, u32 target) 231{ 232 u32 hart_idx, guest_idx, eiid; 233 234 hart_idx = target >> APLIC_TARGET_HART_IDX_SHIFT; 235 hart_idx &= APLIC_TARGET_HART_IDX_MASK; 236 guest_idx = target >> APLIC_TARGET_GUEST_IDX_SHIFT; 237 guest_idx &= APLIC_TARGET_GUEST_IDX_MASK; 238 eiid = target & APLIC_TARGET_EIID_MASK; 239 kvm_riscv_aia_inject_msi_by_id(kvm, hart_idx, guest_idx, eiid); 240} 241 242static void aplic_update_irq_range(struct kvm *kvm, u32 first, u32 last) 243{ 244 bool inject; 245 u32 irq, target; 246 unsigned long flags; 247 struct aplic_irq *irqd; 248 struct aplic *aplic = kvm->arch.aia.aplic_state; 249 250 if (!(aplic->domaincfg & APLIC_DOMAINCFG_IE)) 251 return; 252 253 for (irq = first; irq <= last; irq++) { 254 if (!irq || aplic->nr_irqs <= irq) 255 continue; 256 irqd = &aplic->irqs[irq]; 257 258 raw_spin_lock_irqsave(&irqd->lock, flags); 259 260 inject = false; 261 target = irqd->target; 262 if ((irqd->state & APLIC_IRQ_STATE_ENPEND) == 263 APLIC_IRQ_STATE_ENPEND) { 264 irqd->state &= ~APLIC_IRQ_STATE_PENDING; 265 inject = true; 266 } 267 268 raw_spin_unlock_irqrestore(&irqd->lock, flags); 269 270 if (inject) 271 aplic_inject_msi(kvm, irq, target); 272 } 273} 274 275int kvm_riscv_aia_aplic_inject(struct kvm *kvm, u32 source, bool level) 276{ 277 u32 target; 278 bool inject = false, ie; 279 unsigned long flags; 280 struct aplic_irq *irqd; 281 struct aplic *aplic = kvm->arch.aia.aplic_state; 282 283 if (!aplic || !source || (aplic->nr_irqs <= source)) 284 return -ENODEV; 285 irqd = &aplic->irqs[source]; 286 ie = (aplic->domaincfg & APLIC_DOMAINCFG_IE) ? true : false; 287 288 raw_spin_lock_irqsave(&irqd->lock, flags); 289 290 if (irqd->sourcecfg & APLIC_SOURCECFG_D) 291 goto skip_unlock; 292 293 switch (irqd->sourcecfg & APLIC_SOURCECFG_SM_MASK) { 294 case APLIC_SOURCECFG_SM_EDGE_RISE: 295 if (level && !(irqd->state & APLIC_IRQ_STATE_INPUT) && 296 !(irqd->state & APLIC_IRQ_STATE_PENDING)) 297 irqd->state |= APLIC_IRQ_STATE_PENDING; 298 break; 299 case APLIC_SOURCECFG_SM_EDGE_FALL: 300 if (!level && (irqd->state & APLIC_IRQ_STATE_INPUT) && 301 !(irqd->state & APLIC_IRQ_STATE_PENDING)) 302 irqd->state |= APLIC_IRQ_STATE_PENDING; 303 break; 304 case APLIC_SOURCECFG_SM_LEVEL_HIGH: 305 if (level && !(irqd->state & APLIC_IRQ_STATE_PENDING)) 306 irqd->state |= APLIC_IRQ_STATE_PENDING; 307 break; 308 case APLIC_SOURCECFG_SM_LEVEL_LOW: 309 if (!level && !(irqd->state & APLIC_IRQ_STATE_PENDING)) 310 irqd->state |= APLIC_IRQ_STATE_PENDING; 311 break; 312 } 313 314 if (level) 315 irqd->state |= APLIC_IRQ_STATE_INPUT; 316 else 317 irqd->state &= ~APLIC_IRQ_STATE_INPUT; 318 319 target = irqd->target; 320 if (ie && ((irqd->state & APLIC_IRQ_STATE_ENPEND) == 321 APLIC_IRQ_STATE_ENPEND)) { 322 irqd->state &= ~APLIC_IRQ_STATE_PENDING; 323 inject = true; 324 } 325 326skip_unlock: 327 raw_spin_unlock_irqrestore(&irqd->lock, flags); 328 329 if (inject) 330 aplic_inject_msi(kvm, source, target); 331 332 return 0; 333} 334 335static u32 aplic_read_input_word(struct aplic *aplic, u32 word) 336{ 337 u32 i, ret = 0; 338 339 for (i = 0; i < 32; i++) 340 ret |= aplic_read_input(aplic, word * 32 + i) ? BIT(i) : 0; 341 342 return ret; 343} 344 345static u32 aplic_read_pending_word(struct aplic *aplic, u32 word) 346{ 347 u32 i, ret = 0; 348 349 for (i = 0; i < 32; i++) 350 ret |= aplic_read_pending(aplic, word * 32 + i) ? BIT(i) : 0; 351 352 return ret; 353} 354 355static void aplic_write_pending_word(struct aplic *aplic, u32 word, 356 u32 val, bool pending) 357{ 358 u32 i; 359 360 for (i = 0; i < 32; i++) { 361 if (val & BIT(i)) 362 aplic_write_pending(aplic, word * 32 + i, pending); 363 } 364} 365 366static u32 aplic_read_enabled_word(struct aplic *aplic, u32 word) 367{ 368 u32 i, ret = 0; 369 370 for (i = 0; i < 32; i++) 371 ret |= aplic_read_enabled(aplic, word * 32 + i) ? BIT(i) : 0; 372 373 return ret; 374} 375 376static void aplic_write_enabled_word(struct aplic *aplic, u32 word, 377 u32 val, bool enabled) 378{ 379 u32 i; 380 381 for (i = 0; i < 32; i++) { 382 if (val & BIT(i)) 383 aplic_write_enabled(aplic, word * 32 + i, enabled); 384 } 385} 386 387static int aplic_mmio_read_offset(struct kvm *kvm, gpa_t off, u32 *val32) 388{ 389 u32 i; 390 struct aplic *aplic = kvm->arch.aia.aplic_state; 391 392 if ((off & 0x3) != 0) 393 return -EOPNOTSUPP; 394 395 if (off == APLIC_DOMAINCFG) { 396 *val32 = APLIC_DOMAINCFG_RDONLY | 397 aplic->domaincfg | APLIC_DOMAINCFG_DM; 398 } else if ((off >= APLIC_SOURCECFG_BASE) && 399 (off < (APLIC_SOURCECFG_BASE + (aplic->nr_irqs - 1) * 4))) { 400 i = ((off - APLIC_SOURCECFG_BASE) >> 2) + 1; 401 *val32 = aplic_read_sourcecfg(aplic, i); 402 } else if ((off >= APLIC_SETIP_BASE) && 403 (off < (APLIC_SETIP_BASE + aplic->nr_words * 4))) { 404 i = (off - APLIC_SETIP_BASE) >> 2; 405 *val32 = aplic_read_pending_word(aplic, i); 406 } else if (off == APLIC_SETIPNUM) { 407 *val32 = 0; 408 } else if ((off >= APLIC_CLRIP_BASE) && 409 (off < (APLIC_CLRIP_BASE + aplic->nr_words * 4))) { 410 i = (off - APLIC_CLRIP_BASE) >> 2; 411 *val32 = aplic_read_input_word(aplic, i); 412 } else if (off == APLIC_CLRIPNUM) { 413 *val32 = 0; 414 } else if ((off >= APLIC_SETIE_BASE) && 415 (off < (APLIC_SETIE_BASE + aplic->nr_words * 4))) { 416 i = (off - APLIC_SETIE_BASE) >> 2; 417 *val32 = aplic_read_enabled_word(aplic, i); 418 } else if (off == APLIC_SETIENUM) { 419 *val32 = 0; 420 } else if ((off >= APLIC_CLRIE_BASE) && 421 (off < (APLIC_CLRIE_BASE + aplic->nr_words * 4))) { 422 *val32 = 0; 423 } else if (off == APLIC_CLRIENUM) { 424 *val32 = 0; 425 } else if (off == APLIC_SETIPNUM_LE) { 426 *val32 = 0; 427 } else if (off == APLIC_SETIPNUM_BE) { 428 *val32 = 0; 429 } else if (off == APLIC_GENMSI) { 430 *val32 = aplic->genmsi; 431 } else if ((off >= APLIC_TARGET_BASE) && 432 (off < (APLIC_TARGET_BASE + (aplic->nr_irqs - 1) * 4))) { 433 i = ((off - APLIC_TARGET_BASE) >> 2) + 1; 434 *val32 = aplic_read_target(aplic, i); 435 } else 436 return -ENODEV; 437 438 return 0; 439} 440 441static int aplic_mmio_read(struct kvm_vcpu *vcpu, struct kvm_io_device *dev, 442 gpa_t addr, int len, void *val) 443{ 444 if (len != 4) 445 return -EOPNOTSUPP; 446 447 return aplic_mmio_read_offset(vcpu->kvm, 448 addr - vcpu->kvm->arch.aia.aplic_addr, 449 val); 450} 451 452static int aplic_mmio_write_offset(struct kvm *kvm, gpa_t off, u32 val32) 453{ 454 u32 i; 455 struct aplic *aplic = kvm->arch.aia.aplic_state; 456 457 if ((off & 0x3) != 0) 458 return -EOPNOTSUPP; 459 460 if (off == APLIC_DOMAINCFG) { 461 /* Only IE bit writeable */ 462 aplic->domaincfg = val32 & APLIC_DOMAINCFG_IE; 463 } else if ((off >= APLIC_SOURCECFG_BASE) && 464 (off < (APLIC_SOURCECFG_BASE + (aplic->nr_irqs - 1) * 4))) { 465 i = ((off - APLIC_SOURCECFG_BASE) >> 2) + 1; 466 aplic_write_sourcecfg(aplic, i, val32); 467 } else if ((off >= APLIC_SETIP_BASE) && 468 (off < (APLIC_SETIP_BASE + aplic->nr_words * 4))) { 469 i = (off - APLIC_SETIP_BASE) >> 2; 470 aplic_write_pending_word(aplic, i, val32, true); 471 } else if (off == APLIC_SETIPNUM) { 472 aplic_write_pending(aplic, val32, true); 473 } else if ((off >= APLIC_CLRIP_BASE) && 474 (off < (APLIC_CLRIP_BASE + aplic->nr_words * 4))) { 475 i = (off - APLIC_CLRIP_BASE) >> 2; 476 aplic_write_pending_word(aplic, i, val32, false); 477 } else if (off == APLIC_CLRIPNUM) { 478 aplic_write_pending(aplic, val32, false); 479 } else if ((off >= APLIC_SETIE_BASE) && 480 (off < (APLIC_SETIE_BASE + aplic->nr_words * 4))) { 481 i = (off - APLIC_SETIE_BASE) >> 2; 482 aplic_write_enabled_word(aplic, i, val32, true); 483 } else if (off == APLIC_SETIENUM) { 484 aplic_write_enabled(aplic, val32, true); 485 } else if ((off >= APLIC_CLRIE_BASE) && 486 (off < (APLIC_CLRIE_BASE + aplic->nr_words * 4))) { 487 i = (off - APLIC_CLRIE_BASE) >> 2; 488 aplic_write_enabled_word(aplic, i, val32, false); 489 } else if (off == APLIC_CLRIENUM) { 490 aplic_write_enabled(aplic, val32, false); 491 } else if (off == APLIC_SETIPNUM_LE) { 492 aplic_write_pending(aplic, val32, true); 493 } else if (off == APLIC_SETIPNUM_BE) { 494 aplic_write_pending(aplic, __swab32(val32), true); 495 } else if (off == APLIC_GENMSI) { 496 aplic->genmsi = val32 & ~(APLIC_TARGET_GUEST_IDX_MASK << 497 APLIC_TARGET_GUEST_IDX_SHIFT); 498 kvm_riscv_aia_inject_msi_by_id(kvm, 499 val32 >> APLIC_TARGET_HART_IDX_SHIFT, 0, 500 val32 & APLIC_TARGET_EIID_MASK); 501 } else if ((off >= APLIC_TARGET_BASE) && 502 (off < (APLIC_TARGET_BASE + (aplic->nr_irqs - 1) * 4))) { 503 i = ((off - APLIC_TARGET_BASE) >> 2) + 1; 504 aplic_write_target(aplic, i, val32); 505 } else 506 return -ENODEV; 507 508 aplic_update_irq_range(kvm, 1, aplic->nr_irqs - 1); 509 510 return 0; 511} 512 513static int aplic_mmio_write(struct kvm_vcpu *vcpu, struct kvm_io_device *dev, 514 gpa_t addr, int len, const void *val) 515{ 516 if (len != 4) 517 return -EOPNOTSUPP; 518 519 return aplic_mmio_write_offset(vcpu->kvm, 520 addr - vcpu->kvm->arch.aia.aplic_addr, 521 *((const u32 *)val)); 522} 523 524static struct kvm_io_device_ops aplic_iodoev_ops = { 525 .read = aplic_mmio_read, 526 .write = aplic_mmio_write, 527}; 528 529int kvm_riscv_aia_aplic_set_attr(struct kvm *kvm, unsigned long type, u32 v) 530{ 531 int rc; 532 533 if (!kvm->arch.aia.aplic_state) 534 return -ENODEV; 535 536 rc = aplic_mmio_write_offset(kvm, type, v); 537 if (rc) 538 return rc; 539 540 return 0; 541} 542 543int kvm_riscv_aia_aplic_get_attr(struct kvm *kvm, unsigned long type, u32 *v) 544{ 545 int rc; 546 547 if (!kvm->arch.aia.aplic_state) 548 return -ENODEV; 549 550 rc = aplic_mmio_read_offset(kvm, type, v); 551 if (rc) 552 return rc; 553 554 return 0; 555} 556 557int kvm_riscv_aia_aplic_has_attr(struct kvm *kvm, unsigned long type) 558{ 559 int rc; 560 u32 val; 561 562 if (!kvm->arch.aia.aplic_state) 563 return -ENODEV; 564 565 rc = aplic_mmio_read_offset(kvm, type, &val); 566 if (rc) 567 return rc; 568 569 return 0; 570} 571 572int kvm_riscv_aia_aplic_init(struct kvm *kvm) 573{ 574 int i, ret = 0; 575 struct aplic *aplic; 576 577 /* Do nothing if we have zero sources */ 578 if (!kvm->arch.aia.nr_sources) 579 return 0; 580 581 /* Allocate APLIC global state */ 582 aplic = kzalloc(sizeof(*aplic), GFP_KERNEL); 583 if (!aplic) 584 return -ENOMEM; 585 kvm->arch.aia.aplic_state = aplic; 586 587 /* Setup APLIC IRQs */ 588 aplic->nr_irqs = kvm->arch.aia.nr_sources + 1; 589 aplic->nr_words = DIV_ROUND_UP(aplic->nr_irqs, 32); 590 aplic->irqs = kcalloc(aplic->nr_irqs, 591 sizeof(*aplic->irqs), GFP_KERNEL); 592 if (!aplic->irqs) { 593 ret = -ENOMEM; 594 goto fail_free_aplic; 595 } 596 for (i = 0; i < aplic->nr_irqs; i++) 597 raw_spin_lock_init(&aplic->irqs[i].lock); 598 599 /* Setup IO device */ 600 kvm_iodevice_init(&aplic->iodev, &aplic_iodoev_ops); 601 mutex_lock(&kvm->slots_lock); 602 ret = kvm_io_bus_register_dev(kvm, KVM_MMIO_BUS, 603 kvm->arch.aia.aplic_addr, 604 KVM_DEV_RISCV_APLIC_SIZE, 605 &aplic->iodev); 606 mutex_unlock(&kvm->slots_lock); 607 if (ret) 608 goto fail_free_aplic_irqs; 609 610 /* Setup default IRQ routing */ 611 ret = kvm_riscv_setup_default_irq_routing(kvm, aplic->nr_irqs); 612 if (ret) 613 goto fail_unreg_iodev; 614 615 return 0; 616 617fail_unreg_iodev: 618 mutex_lock(&kvm->slots_lock); 619 kvm_io_bus_unregister_dev(kvm, KVM_MMIO_BUS, &aplic->iodev); 620 mutex_unlock(&kvm->slots_lock); 621fail_free_aplic_irqs: 622 kfree(aplic->irqs); 623fail_free_aplic: 624 kvm->arch.aia.aplic_state = NULL; 625 kfree(aplic); 626 return ret; 627} 628 629void kvm_riscv_aia_aplic_cleanup(struct kvm *kvm) 630{ 631 struct aplic *aplic = kvm->arch.aia.aplic_state; 632 633 if (!aplic) 634 return; 635 636 mutex_lock(&kvm->slots_lock); 637 kvm_io_bus_unregister_dev(kvm, KVM_MMIO_BUS, &aplic->iodev); 638 mutex_unlock(&kvm->slots_lock); 639 640 kfree(aplic->irqs); 641 642 kvm->arch.aia.aplic_state = NULL; 643 kfree(aplic); 644} 645