1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (C) 2009. SUSE Linux Products GmbH. All rights reserved. 4 * 5 * Authors: 6 * Alexander Graf <agraf@suse.de> 7 * Kevin Wolf <mail@kevin-wolf.de> 8 * 9 * Description: 10 * This file is derived from arch/powerpc/kvm/44x.c, 11 * by Hollis Blanchard <hollisb@us.ibm.com>. 12 */ 13 14 #include <linux/kvm_host.h> 15 #include <linux/err.h> 16 #include <linux/export.h> 17 #include <linux/slab.h> 18 #include <linux/module.h> 19 #include <linux/miscdevice.h> 20 #include <linux/gfp.h> 21 #include <linux/sched.h> 22 #include <linux/vmalloc.h> 23 #include <linux/highmem.h> 24 25 #include <asm/reg.h> 26 #include <asm/cputable.h> 27 #include <asm/cacheflush.h> 28 #include <linux/uaccess.h> 29 #include <asm/io.h> 30 #include <asm/kvm_ppc.h> 31 #include <asm/kvm_book3s.h> 32 #include <asm/mmu_context.h> 33 #include <asm/page.h> 34 #include <asm/xive.h> 35 36 #include "book3s.h" 37 #include "trace.h" 38 39 /* #define EXIT_DEBUG */ 40 41 const struct _kvm_stats_desc kvm_vm_stats_desc[] = { 42 KVM_GENERIC_VM_STATS(), 43 STATS_DESC_ICOUNTER(VM, num_2M_pages), 44 STATS_DESC_ICOUNTER(VM, num_1G_pages) 45 }; 46 47 const struct kvm_stats_header kvm_vm_stats_header = { 48 .name_size = KVM_STATS_NAME_SIZE, 49 .num_desc = ARRAY_SIZE(kvm_vm_stats_desc), 50 .id_offset = sizeof(struct kvm_stats_header), 51 .desc_offset = sizeof(struct kvm_stats_header) + KVM_STATS_NAME_SIZE, 52 .data_offset = sizeof(struct kvm_stats_header) + KVM_STATS_NAME_SIZE + 53 sizeof(kvm_vm_stats_desc), 54 }; 55 56 const struct _kvm_stats_desc kvm_vcpu_stats_desc[] = { 57 KVM_GENERIC_VCPU_STATS(), 58 STATS_DESC_COUNTER(VCPU, sum_exits), 59 STATS_DESC_COUNTER(VCPU, mmio_exits), 60 STATS_DESC_COUNTER(VCPU, signal_exits), 61 STATS_DESC_COUNTER(VCPU, light_exits), 62 STATS_DESC_COUNTER(VCPU, itlb_real_miss_exits), 63 STATS_DESC_COUNTER(VCPU, itlb_virt_miss_exits), 64 STATS_DESC_COUNTER(VCPU, dtlb_real_miss_exits), 65 STATS_DESC_COUNTER(VCPU, dtlb_virt_miss_exits), 66 STATS_DESC_COUNTER(VCPU, syscall_exits), 67 STATS_DESC_COUNTER(VCPU, isi_exits), 68 STATS_DESC_COUNTER(VCPU, dsi_exits), 69 STATS_DESC_COUNTER(VCPU, emulated_inst_exits), 70 STATS_DESC_COUNTER(VCPU, dec_exits), 71 STATS_DESC_COUNTER(VCPU, ext_intr_exits), 72 STATS_DESC_COUNTER(VCPU, halt_successful_wait), 73 STATS_DESC_COUNTER(VCPU, dbell_exits), 74 STATS_DESC_COUNTER(VCPU, gdbell_exits), 75 STATS_DESC_COUNTER(VCPU, ld), 76 STATS_DESC_COUNTER(VCPU, st), 77 STATS_DESC_COUNTER(VCPU, pf_storage), 78 STATS_DESC_COUNTER(VCPU, pf_instruc), 79 STATS_DESC_COUNTER(VCPU, sp_storage), 80 STATS_DESC_COUNTER(VCPU, sp_instruc), 81 STATS_DESC_COUNTER(VCPU, queue_intr), 82 STATS_DESC_COUNTER(VCPU, ld_slow), 83 STATS_DESC_COUNTER(VCPU, st_slow), 84 STATS_DESC_COUNTER(VCPU, pthru_all), 85 STATS_DESC_COUNTER(VCPU, pthru_host), 86 STATS_DESC_COUNTER(VCPU, pthru_bad_aff) 87 }; 88 89 const struct kvm_stats_header kvm_vcpu_stats_header = { 90 .name_size = KVM_STATS_NAME_SIZE, 91 .num_desc = ARRAY_SIZE(kvm_vcpu_stats_desc), 92 .id_offset = sizeof(struct kvm_stats_header), 93 .desc_offset = sizeof(struct kvm_stats_header) + KVM_STATS_NAME_SIZE, 94 .data_offset = sizeof(struct kvm_stats_header) + KVM_STATS_NAME_SIZE + 95 sizeof(kvm_vcpu_stats_desc), 96 }; 97 98 static inline void kvmppc_update_int_pending(struct kvm_vcpu *vcpu, 99 unsigned long pending_now, unsigned long old_pending) 100 { 101 if (is_kvmppc_hv_enabled(vcpu->kvm)) 102 return; 103 if (pending_now) 104 kvmppc_set_int_pending(vcpu, 1); 105 else if (old_pending) 106 kvmppc_set_int_pending(vcpu, 0); 107 } 108 109 static inline bool kvmppc_critical_section(struct kvm_vcpu *vcpu) 110 { 111 ulong crit_raw; 112 ulong crit_r1; 113 bool crit; 114 115 if (is_kvmppc_hv_enabled(vcpu->kvm)) 116 return false; 117 118 crit_raw = kvmppc_get_critical(vcpu); 119 crit_r1 = kvmppc_get_gpr(vcpu, 1); 120 121 /* Truncate crit indicators in 32 bit mode */ 122 if (!(kvmppc_get_msr(vcpu) & MSR_SF)) { 123 crit_raw &= 0xffffffff; 124 crit_r1 &= 0xffffffff; 125 } 126 127 /* Critical section when crit == r1 */ 128 crit = (crit_raw == crit_r1); 129 /* ... and we're in supervisor mode */ 130 crit = crit && !(kvmppc_get_msr(vcpu) & MSR_PR); 131 132 return crit; 133 } 134 135 void kvmppc_inject_interrupt(struct kvm_vcpu *vcpu, int vec, u64 flags) 136 { 137 vcpu->kvm->arch.kvm_ops->inject_interrupt(vcpu, vec, flags); 138 } 139 140 static int kvmppc_book3s_vec2irqprio(unsigned int vec) 141 { 142 unsigned int prio; 143 144 switch (vec) { 145 case 0x100: prio = BOOK3S_IRQPRIO_SYSTEM_RESET; break; 146 case 0x200: prio = BOOK3S_IRQPRIO_MACHINE_CHECK; break; 147 case 0x300: prio = BOOK3S_IRQPRIO_DATA_STORAGE; break; 148 case 0x380: prio = BOOK3S_IRQPRIO_DATA_SEGMENT; break; 149 case 0x400: prio = BOOK3S_IRQPRIO_INST_STORAGE; break; 150 case 0x480: prio = BOOK3S_IRQPRIO_INST_SEGMENT; break; 151 case 0x500: prio = BOOK3S_IRQPRIO_EXTERNAL; break; 152 case 0x600: prio = BOOK3S_IRQPRIO_ALIGNMENT; break; 153 case 0x700: prio = BOOK3S_IRQPRIO_PROGRAM; break; 154 case 0x800: prio = BOOK3S_IRQPRIO_FP_UNAVAIL; break; 155 case 0x900: prio = BOOK3S_IRQPRIO_DECREMENTER; break; 156 case 0xc00: prio = BOOK3S_IRQPRIO_SYSCALL; break; 157 case 0xd00: prio = BOOK3S_IRQPRIO_DEBUG; break; 158 case 0xf20: prio = BOOK3S_IRQPRIO_ALTIVEC; break; 159 case 0xf40: prio = BOOK3S_IRQPRIO_VSX; break; 160 case 0xf60: prio = BOOK3S_IRQPRIO_FAC_UNAVAIL; break; 161 default: prio = BOOK3S_IRQPRIO_MAX; break; 162 } 163 164 return prio; 165 } 166 167 void kvmppc_book3s_dequeue_irqprio(struct kvm_vcpu *vcpu, 168 unsigned int vec) 169 { 170 unsigned long old_pending = vcpu->arch.pending_exceptions; 171 172 clear_bit(kvmppc_book3s_vec2irqprio(vec), 173 &vcpu->arch.pending_exceptions); 174 175 kvmppc_update_int_pending(vcpu, vcpu->arch.pending_exceptions, 176 old_pending); 177 } 178 179 void kvmppc_book3s_queue_irqprio(struct kvm_vcpu *vcpu, unsigned int vec) 180 { 181 vcpu->stat.queue_intr++; 182 183 set_bit(kvmppc_book3s_vec2irqprio(vec), 184 &vcpu->arch.pending_exceptions); 185 #ifdef EXIT_DEBUG 186 printk(KERN_INFO "Queueing interrupt %x\n", vec); 187 #endif 188 } 189 EXPORT_SYMBOL_GPL(kvmppc_book3s_queue_irqprio); 190 191 void kvmppc_core_queue_machine_check(struct kvm_vcpu *vcpu, ulong flags) 192 { 193 /* might as well deliver this straight away */ 194 kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_MACHINE_CHECK, flags); 195 } 196 EXPORT_SYMBOL_GPL(kvmppc_core_queue_machine_check); 197 198 void kvmppc_core_queue_syscall(struct kvm_vcpu *vcpu) 199 { 200 kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_SYSCALL, 0); 201 } 202 EXPORT_SYMBOL(kvmppc_core_queue_syscall); 203 204 void kvmppc_core_queue_program(struct kvm_vcpu *vcpu, ulong flags) 205 { 206 /* might as well deliver this straight away */ 207 kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_PROGRAM, flags); 208 } 209 EXPORT_SYMBOL_GPL(kvmppc_core_queue_program); 210 211 void kvmppc_core_queue_fpunavail(struct kvm_vcpu *vcpu) 212 { 213 /* might as well deliver this straight away */ 214 kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_FP_UNAVAIL, 0); 215 } 216 217 void kvmppc_core_queue_vec_unavail(struct kvm_vcpu *vcpu) 218 { 219 /* might as well deliver this straight away */ 220 kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_ALTIVEC, 0); 221 } 222 223 void kvmppc_core_queue_vsx_unavail(struct kvm_vcpu *vcpu) 224 { 225 /* might as well deliver this straight away */ 226 kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_VSX, 0); 227 } 228 229 void kvmppc_core_queue_dec(struct kvm_vcpu *vcpu) 230 { 231 kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_DECREMENTER); 232 } 233 EXPORT_SYMBOL_GPL(kvmppc_core_queue_dec); 234 235 int kvmppc_core_pending_dec(struct kvm_vcpu *vcpu) 236 { 237 return test_bit(BOOK3S_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions); 238 } 239 EXPORT_SYMBOL_GPL(kvmppc_core_pending_dec); 240 241 void kvmppc_core_dequeue_dec(struct kvm_vcpu *vcpu) 242 { 243 kvmppc_book3s_dequeue_irqprio(vcpu, BOOK3S_INTERRUPT_DECREMENTER); 244 } 245 EXPORT_SYMBOL_GPL(kvmppc_core_dequeue_dec); 246 247 void kvmppc_core_queue_external(struct kvm_vcpu *vcpu, 248 struct kvm_interrupt *irq) 249 { 250 /* 251 * This case (KVM_INTERRUPT_SET) should never actually arise for 252 * a pseries guest (because pseries guests expect their interrupt 253 * controllers to continue asserting an external interrupt request 254 * until it is acknowledged at the interrupt controller), but is 255 * included to avoid ABI breakage and potentially for other 256 * sorts of guest. 257 * 258 * There is a subtlety here: HV KVM does not test the 259 * external_oneshot flag in the code that synthesizes 260 * external interrupts for the guest just before entering 261 * the guest. That is OK even if userspace did do a 262 * KVM_INTERRUPT_SET on a pseries guest vcpu, because the 263 * caller (kvm_vcpu_ioctl_interrupt) does a kvm_vcpu_kick() 264 * which ends up doing a smp_send_reschedule(), which will 265 * pull the guest all the way out to the host, meaning that 266 * we will call kvmppc_core_prepare_to_enter() before entering 267 * the guest again, and that will handle the external_oneshot 268 * flag correctly. 269 */ 270 if (irq->irq == KVM_INTERRUPT_SET) 271 vcpu->arch.external_oneshot = 1; 272 273 kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_EXTERNAL); 274 } 275 276 void kvmppc_core_dequeue_external(struct kvm_vcpu *vcpu) 277 { 278 kvmppc_book3s_dequeue_irqprio(vcpu, BOOK3S_INTERRUPT_EXTERNAL); 279 } 280 281 void kvmppc_core_queue_data_storage(struct kvm_vcpu *vcpu, ulong dar, 282 ulong flags) 283 { 284 kvmppc_set_dar(vcpu, dar); 285 kvmppc_set_dsisr(vcpu, flags); 286 kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_DATA_STORAGE, 0); 287 } 288 EXPORT_SYMBOL_GPL(kvmppc_core_queue_data_storage); 289 290 void kvmppc_core_queue_inst_storage(struct kvm_vcpu *vcpu, ulong flags) 291 { 292 kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_INST_STORAGE, flags); 293 } 294 EXPORT_SYMBOL_GPL(kvmppc_core_queue_inst_storage); 295 296 static int kvmppc_book3s_irqprio_deliver(struct kvm_vcpu *vcpu, 297 unsigned int priority) 298 { 299 int deliver = 1; 300 int vec = 0; 301 bool crit = kvmppc_critical_section(vcpu); 302 303 switch (priority) { 304 case BOOK3S_IRQPRIO_DECREMENTER: 305 deliver = (kvmppc_get_msr(vcpu) & MSR_EE) && !crit; 306 vec = BOOK3S_INTERRUPT_DECREMENTER; 307 break; 308 case BOOK3S_IRQPRIO_EXTERNAL: 309 deliver = (kvmppc_get_msr(vcpu) & MSR_EE) && !crit; 310 vec = BOOK3S_INTERRUPT_EXTERNAL; 311 break; 312 case BOOK3S_IRQPRIO_SYSTEM_RESET: 313 vec = BOOK3S_INTERRUPT_SYSTEM_RESET; 314 break; 315 case BOOK3S_IRQPRIO_MACHINE_CHECK: 316 vec = BOOK3S_INTERRUPT_MACHINE_CHECK; 317 break; 318 case BOOK3S_IRQPRIO_DATA_STORAGE: 319 vec = BOOK3S_INTERRUPT_DATA_STORAGE; 320 break; 321 case BOOK3S_IRQPRIO_INST_STORAGE: 322 vec = BOOK3S_INTERRUPT_INST_STORAGE; 323 break; 324 case BOOK3S_IRQPRIO_DATA_SEGMENT: 325 vec = BOOK3S_INTERRUPT_DATA_SEGMENT; 326 break; 327 case BOOK3S_IRQPRIO_INST_SEGMENT: 328 vec = BOOK3S_INTERRUPT_INST_SEGMENT; 329 break; 330 case BOOK3S_IRQPRIO_ALIGNMENT: 331 vec = BOOK3S_INTERRUPT_ALIGNMENT; 332 break; 333 case BOOK3S_IRQPRIO_PROGRAM: 334 vec = BOOK3S_INTERRUPT_PROGRAM; 335 break; 336 case BOOK3S_IRQPRIO_VSX: 337 vec = BOOK3S_INTERRUPT_VSX; 338 break; 339 case BOOK3S_IRQPRIO_ALTIVEC: 340 vec = BOOK3S_INTERRUPT_ALTIVEC; 341 break; 342 case BOOK3S_IRQPRIO_FP_UNAVAIL: 343 vec = BOOK3S_INTERRUPT_FP_UNAVAIL; 344 break; 345 case BOOK3S_IRQPRIO_SYSCALL: 346 vec = BOOK3S_INTERRUPT_SYSCALL; 347 break; 348 case BOOK3S_IRQPRIO_DEBUG: 349 vec = BOOK3S_INTERRUPT_TRACE; 350 break; 351 case BOOK3S_IRQPRIO_PERFORMANCE_MONITOR: 352 vec = BOOK3S_INTERRUPT_PERFMON; 353 break; 354 case BOOK3S_IRQPRIO_FAC_UNAVAIL: 355 vec = BOOK3S_INTERRUPT_FAC_UNAVAIL; 356 break; 357 default: 358 deliver = 0; 359 printk(KERN_ERR "KVM: Unknown interrupt: 0x%x\n", priority); 360 break; 361 } 362 363 #if 0 364 printk(KERN_INFO "Deliver interrupt 0x%x? %x\n", vec, deliver); 365 #endif 366 367 if (deliver) 368 kvmppc_inject_interrupt(vcpu, vec, 0); 369 370 return deliver; 371 } 372 373 /* 374 * This function determines if an irqprio should be cleared once issued. 375 */ 376 static bool clear_irqprio(struct kvm_vcpu *vcpu, unsigned int priority) 377 { 378 switch (priority) { 379 case BOOK3S_IRQPRIO_DECREMENTER: 380 /* DEC interrupts get cleared by mtdec */ 381 return false; 382 case BOOK3S_IRQPRIO_EXTERNAL: 383 /* 384 * External interrupts get cleared by userspace 385 * except when set by the KVM_INTERRUPT ioctl with 386 * KVM_INTERRUPT_SET (not KVM_INTERRUPT_SET_LEVEL). 387 */ 388 if (vcpu->arch.external_oneshot) { 389 vcpu->arch.external_oneshot = 0; 390 return true; 391 } 392 return false; 393 } 394 395 return true; 396 } 397 398 int kvmppc_core_prepare_to_enter(struct kvm_vcpu *vcpu) 399 { 400 unsigned long *pending = &vcpu->arch.pending_exceptions; 401 unsigned long old_pending = vcpu->arch.pending_exceptions; 402 unsigned int priority; 403 404 #ifdef EXIT_DEBUG 405 if (vcpu->arch.pending_exceptions) 406 printk(KERN_EMERG "KVM: Check pending: %lx\n", vcpu->arch.pending_exceptions); 407 #endif 408 priority = __ffs(*pending); 409 while (priority < BOOK3S_IRQPRIO_MAX) { 410 if (kvmppc_book3s_irqprio_deliver(vcpu, priority) && 411 clear_irqprio(vcpu, priority)) { 412 clear_bit(priority, &vcpu->arch.pending_exceptions); 413 break; 414 } 415 416 priority = find_next_bit(pending, 417 BITS_PER_BYTE * sizeof(*pending), 418 priority + 1); 419 } 420 421 /* Tell the guest about our interrupt status */ 422 kvmppc_update_int_pending(vcpu, *pending, old_pending); 423 424 return 0; 425 } 426 EXPORT_SYMBOL_GPL(kvmppc_core_prepare_to_enter); 427 428 kvm_pfn_t kvmppc_gpa_to_pfn(struct kvm_vcpu *vcpu, gpa_t gpa, bool writing, 429 bool *writable) 430 { 431 ulong mp_pa = vcpu->arch.magic_page_pa & KVM_PAM; 432 gfn_t gfn = gpa >> PAGE_SHIFT; 433 434 if (!(kvmppc_get_msr(vcpu) & MSR_SF)) 435 mp_pa = (uint32_t)mp_pa; 436 437 /* Magic page override */ 438 gpa &= ~0xFFFULL; 439 if (unlikely(mp_pa) && unlikely((gpa & KVM_PAM) == mp_pa)) { 440 ulong shared_page = ((ulong)vcpu->arch.shared) & PAGE_MASK; 441 kvm_pfn_t pfn; 442 443 pfn = (kvm_pfn_t)virt_to_phys((void*)shared_page) >> PAGE_SHIFT; 444 get_page(pfn_to_page(pfn)); 445 if (writable) 446 *writable = true; 447 return pfn; 448 } 449 450 return gfn_to_pfn_prot(vcpu->kvm, gfn, writing, writable); 451 } 452 EXPORT_SYMBOL_GPL(kvmppc_gpa_to_pfn); 453 454 int kvmppc_xlate(struct kvm_vcpu *vcpu, ulong eaddr, enum xlate_instdata xlid, 455 enum xlate_readwrite xlrw, struct kvmppc_pte *pte) 456 { 457 bool data = (xlid == XLATE_DATA); 458 bool iswrite = (xlrw == XLATE_WRITE); 459 int relocated = (kvmppc_get_msr(vcpu) & (data ? MSR_DR : MSR_IR)); 460 int r; 461 462 if (relocated) { 463 r = vcpu->arch.mmu.xlate(vcpu, eaddr, pte, data, iswrite); 464 } else { 465 pte->eaddr = eaddr; 466 pte->raddr = eaddr & KVM_PAM; 467 pte->vpage = VSID_REAL | eaddr >> 12; 468 pte->may_read = true; 469 pte->may_write = true; 470 pte->may_execute = true; 471 r = 0; 472 473 if ((kvmppc_get_msr(vcpu) & (MSR_IR | MSR_DR)) == MSR_DR && 474 !data) { 475 if ((vcpu->arch.hflags & BOOK3S_HFLAG_SPLIT_HACK) && 476 ((eaddr & SPLIT_HACK_MASK) == SPLIT_HACK_OFFS)) 477 pte->raddr &= ~SPLIT_HACK_MASK; 478 } 479 } 480 481 return r; 482 } 483 484 int kvmppc_load_last_inst(struct kvm_vcpu *vcpu, 485 enum instruction_fetch_type type, u32 *inst) 486 { 487 ulong pc = kvmppc_get_pc(vcpu); 488 int r; 489 490 if (type == INST_SC) 491 pc -= 4; 492 493 r = kvmppc_ld(vcpu, &pc, sizeof(u32), inst, false); 494 if (r == EMULATE_DONE) 495 return r; 496 else 497 return EMULATE_AGAIN; 498 } 499 EXPORT_SYMBOL_GPL(kvmppc_load_last_inst); 500 501 int kvmppc_subarch_vcpu_init(struct kvm_vcpu *vcpu) 502 { 503 return 0; 504 } 505 506 void kvmppc_subarch_vcpu_uninit(struct kvm_vcpu *vcpu) 507 { 508 } 509 510 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, 511 struct kvm_sregs *sregs) 512 { 513 int ret; 514 515 vcpu_load(vcpu); 516 ret = vcpu->kvm->arch.kvm_ops->get_sregs(vcpu, sregs); 517 vcpu_put(vcpu); 518 519 return ret; 520 } 521 522 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, 523 struct kvm_sregs *sregs) 524 { 525 int ret; 526 527 vcpu_load(vcpu); 528 ret = vcpu->kvm->arch.kvm_ops->set_sregs(vcpu, sregs); 529 vcpu_put(vcpu); 530 531 return ret; 532 } 533 534 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) 535 { 536 int i; 537 538 regs->pc = kvmppc_get_pc(vcpu); 539 regs->cr = kvmppc_get_cr(vcpu); 540 regs->ctr = kvmppc_get_ctr(vcpu); 541 regs->lr = kvmppc_get_lr(vcpu); 542 regs->xer = kvmppc_get_xer(vcpu); 543 regs->msr = kvmppc_get_msr(vcpu); 544 regs->srr0 = kvmppc_get_srr0(vcpu); 545 regs->srr1 = kvmppc_get_srr1(vcpu); 546 regs->pid = vcpu->arch.pid; 547 regs->sprg0 = kvmppc_get_sprg0(vcpu); 548 regs->sprg1 = kvmppc_get_sprg1(vcpu); 549 regs->sprg2 = kvmppc_get_sprg2(vcpu); 550 regs->sprg3 = kvmppc_get_sprg3(vcpu); 551 regs->sprg4 = kvmppc_get_sprg4(vcpu); 552 regs->sprg5 = kvmppc_get_sprg5(vcpu); 553 regs->sprg6 = kvmppc_get_sprg6(vcpu); 554 regs->sprg7 = kvmppc_get_sprg7(vcpu); 555 556 for (i = 0; i < ARRAY_SIZE(regs->gpr); i++) 557 regs->gpr[i] = kvmppc_get_gpr(vcpu, i); 558 559 return 0; 560 } 561 562 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) 563 { 564 int i; 565 566 kvmppc_set_pc(vcpu, regs->pc); 567 kvmppc_set_cr(vcpu, regs->cr); 568 kvmppc_set_ctr(vcpu, regs->ctr); 569 kvmppc_set_lr(vcpu, regs->lr); 570 kvmppc_set_xer(vcpu, regs->xer); 571 kvmppc_set_msr(vcpu, regs->msr); 572 kvmppc_set_srr0(vcpu, regs->srr0); 573 kvmppc_set_srr1(vcpu, regs->srr1); 574 kvmppc_set_sprg0(vcpu, regs->sprg0); 575 kvmppc_set_sprg1(vcpu, regs->sprg1); 576 kvmppc_set_sprg2(vcpu, regs->sprg2); 577 kvmppc_set_sprg3(vcpu, regs->sprg3); 578 kvmppc_set_sprg4(vcpu, regs->sprg4); 579 kvmppc_set_sprg5(vcpu, regs->sprg5); 580 kvmppc_set_sprg6(vcpu, regs->sprg6); 581 kvmppc_set_sprg7(vcpu, regs->sprg7); 582 583 for (i = 0; i < ARRAY_SIZE(regs->gpr); i++) 584 kvmppc_set_gpr(vcpu, i, regs->gpr[i]); 585 586 return 0; 587 } 588 589 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) 590 { 591 return -EOPNOTSUPP; 592 } 593 594 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) 595 { 596 return -EOPNOTSUPP; 597 } 598 599 int kvmppc_get_one_reg(struct kvm_vcpu *vcpu, u64 id, 600 union kvmppc_one_reg *val) 601 { 602 int r = 0; 603 long int i; 604 605 r = vcpu->kvm->arch.kvm_ops->get_one_reg(vcpu, id, val); 606 if (r == -EINVAL) { 607 r = 0; 608 switch (id) { 609 case KVM_REG_PPC_DAR: 610 *val = get_reg_val(id, kvmppc_get_dar(vcpu)); 611 break; 612 case KVM_REG_PPC_DSISR: 613 *val = get_reg_val(id, kvmppc_get_dsisr(vcpu)); 614 break; 615 case KVM_REG_PPC_FPR0 ... KVM_REG_PPC_FPR31: 616 i = id - KVM_REG_PPC_FPR0; 617 *val = get_reg_val(id, VCPU_FPR(vcpu, i)); 618 break; 619 case KVM_REG_PPC_FPSCR: 620 *val = get_reg_val(id, vcpu->arch.fp.fpscr); 621 break; 622 #ifdef CONFIG_VSX 623 case KVM_REG_PPC_VSR0 ... KVM_REG_PPC_VSR31: 624 if (cpu_has_feature(CPU_FTR_VSX)) { 625 i = id - KVM_REG_PPC_VSR0; 626 val->vsxval[0] = vcpu->arch.fp.fpr[i][0]; 627 val->vsxval[1] = vcpu->arch.fp.fpr[i][1]; 628 } else { 629 r = -ENXIO; 630 } 631 break; 632 #endif /* CONFIG_VSX */ 633 case KVM_REG_PPC_DEBUG_INST: 634 *val = get_reg_val(id, INS_TW); 635 break; 636 #ifdef CONFIG_KVM_XICS 637 case KVM_REG_PPC_ICP_STATE: 638 if (!vcpu->arch.icp && !vcpu->arch.xive_vcpu) { 639 r = -ENXIO; 640 break; 641 } 642 if (xics_on_xive()) 643 *val = get_reg_val(id, kvmppc_xive_get_icp(vcpu)); 644 else 645 *val = get_reg_val(id, kvmppc_xics_get_icp(vcpu)); 646 break; 647 #endif /* CONFIG_KVM_XICS */ 648 #ifdef CONFIG_KVM_XIVE 649 case KVM_REG_PPC_VP_STATE: 650 if (!vcpu->arch.xive_vcpu) { 651 r = -ENXIO; 652 break; 653 } 654 if (xive_enabled()) 655 r = kvmppc_xive_native_get_vp(vcpu, val); 656 else 657 r = -ENXIO; 658 break; 659 #endif /* CONFIG_KVM_XIVE */ 660 case KVM_REG_PPC_FSCR: 661 *val = get_reg_val(id, vcpu->arch.fscr); 662 break; 663 case KVM_REG_PPC_TAR: 664 *val = get_reg_val(id, vcpu->arch.tar); 665 break; 666 case KVM_REG_PPC_EBBHR: 667 *val = get_reg_val(id, vcpu->arch.ebbhr); 668 break; 669 case KVM_REG_PPC_EBBRR: 670 *val = get_reg_val(id, vcpu->arch.ebbrr); 671 break; 672 case KVM_REG_PPC_BESCR: 673 *val = get_reg_val(id, vcpu->arch.bescr); 674 break; 675 case KVM_REG_PPC_IC: 676 *val = get_reg_val(id, vcpu->arch.ic); 677 break; 678 default: 679 r = -EINVAL; 680 break; 681 } 682 } 683 684 return r; 685 } 686 687 int kvmppc_set_one_reg(struct kvm_vcpu *vcpu, u64 id, 688 union kvmppc_one_reg *val) 689 { 690 int r = 0; 691 long int i; 692 693 r = vcpu->kvm->arch.kvm_ops->set_one_reg(vcpu, id, val); 694 if (r == -EINVAL) { 695 r = 0; 696 switch (id) { 697 case KVM_REG_PPC_DAR: 698 kvmppc_set_dar(vcpu, set_reg_val(id, *val)); 699 break; 700 case KVM_REG_PPC_DSISR: 701 kvmppc_set_dsisr(vcpu, set_reg_val(id, *val)); 702 break; 703 case KVM_REG_PPC_FPR0 ... KVM_REG_PPC_FPR31: 704 i = id - KVM_REG_PPC_FPR0; 705 VCPU_FPR(vcpu, i) = set_reg_val(id, *val); 706 break; 707 case KVM_REG_PPC_FPSCR: 708 vcpu->arch.fp.fpscr = set_reg_val(id, *val); 709 break; 710 #ifdef CONFIG_VSX 711 case KVM_REG_PPC_VSR0 ... KVM_REG_PPC_VSR31: 712 if (cpu_has_feature(CPU_FTR_VSX)) { 713 i = id - KVM_REG_PPC_VSR0; 714 vcpu->arch.fp.fpr[i][0] = val->vsxval[0]; 715 vcpu->arch.fp.fpr[i][1] = val->vsxval[1]; 716 } else { 717 r = -ENXIO; 718 } 719 break; 720 #endif /* CONFIG_VSX */ 721 #ifdef CONFIG_KVM_XICS 722 case KVM_REG_PPC_ICP_STATE: 723 if (!vcpu->arch.icp && !vcpu->arch.xive_vcpu) { 724 r = -ENXIO; 725 break; 726 } 727 if (xics_on_xive()) 728 r = kvmppc_xive_set_icp(vcpu, set_reg_val(id, *val)); 729 else 730 r = kvmppc_xics_set_icp(vcpu, set_reg_val(id, *val)); 731 break; 732 #endif /* CONFIG_KVM_XICS */ 733 #ifdef CONFIG_KVM_XIVE 734 case KVM_REG_PPC_VP_STATE: 735 if (!vcpu->arch.xive_vcpu) { 736 r = -ENXIO; 737 break; 738 } 739 if (xive_enabled()) 740 r = kvmppc_xive_native_set_vp(vcpu, val); 741 else 742 r = -ENXIO; 743 break; 744 #endif /* CONFIG_KVM_XIVE */ 745 case KVM_REG_PPC_FSCR: 746 vcpu->arch.fscr = set_reg_val(id, *val); 747 break; 748 case KVM_REG_PPC_TAR: 749 vcpu->arch.tar = set_reg_val(id, *val); 750 break; 751 case KVM_REG_PPC_EBBHR: 752 vcpu->arch.ebbhr = set_reg_val(id, *val); 753 break; 754 case KVM_REG_PPC_EBBRR: 755 vcpu->arch.ebbrr = set_reg_val(id, *val); 756 break; 757 case KVM_REG_PPC_BESCR: 758 vcpu->arch.bescr = set_reg_val(id, *val); 759 break; 760 case KVM_REG_PPC_IC: 761 vcpu->arch.ic = set_reg_val(id, *val); 762 break; 763 default: 764 r = -EINVAL; 765 break; 766 } 767 } 768 769 return r; 770 } 771 772 void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu) 773 { 774 vcpu->kvm->arch.kvm_ops->vcpu_load(vcpu, cpu); 775 } 776 777 void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu) 778 { 779 vcpu->kvm->arch.kvm_ops->vcpu_put(vcpu); 780 } 781 782 void kvmppc_set_msr(struct kvm_vcpu *vcpu, u64 msr) 783 { 784 vcpu->kvm->arch.kvm_ops->set_msr(vcpu, msr); 785 } 786 EXPORT_SYMBOL_GPL(kvmppc_set_msr); 787 788 int kvmppc_vcpu_run(struct kvm_vcpu *vcpu) 789 { 790 return vcpu->kvm->arch.kvm_ops->vcpu_run(vcpu); 791 } 792 793 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, 794 struct kvm_translation *tr) 795 { 796 return 0; 797 } 798 799 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, 800 struct kvm_guest_debug *dbg) 801 { 802 vcpu_load(vcpu); 803 vcpu->guest_debug = dbg->control; 804 vcpu_put(vcpu); 805 return 0; 806 } 807 808 void kvmppc_decrementer_func(struct kvm_vcpu *vcpu) 809 { 810 kvmppc_core_queue_dec(vcpu); 811 kvm_vcpu_kick(vcpu); 812 } 813 814 int kvmppc_core_vcpu_create(struct kvm_vcpu *vcpu) 815 { 816 return vcpu->kvm->arch.kvm_ops->vcpu_create(vcpu); 817 } 818 819 void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu) 820 { 821 vcpu->kvm->arch.kvm_ops->vcpu_free(vcpu); 822 } 823 824 int kvmppc_core_check_requests(struct kvm_vcpu *vcpu) 825 { 826 return vcpu->kvm->arch.kvm_ops->check_requests(vcpu); 827 } 828 829 void kvm_arch_sync_dirty_log(struct kvm *kvm, struct kvm_memory_slot *memslot) 830 { 831 832 } 833 834 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log) 835 { 836 return kvm->arch.kvm_ops->get_dirty_log(kvm, log); 837 } 838 839 void kvmppc_core_free_memslot(struct kvm *kvm, struct kvm_memory_slot *slot) 840 { 841 kvm->arch.kvm_ops->free_memslot(slot); 842 } 843 844 void kvmppc_core_flush_memslot(struct kvm *kvm, struct kvm_memory_slot *memslot) 845 { 846 kvm->arch.kvm_ops->flush_memslot(kvm, memslot); 847 } 848 849 int kvmppc_core_prepare_memory_region(struct kvm *kvm, 850 const struct kvm_memory_slot *old, 851 struct kvm_memory_slot *new, 852 enum kvm_mr_change change) 853 { 854 return kvm->arch.kvm_ops->prepare_memory_region(kvm, old, new, change); 855 } 856 857 void kvmppc_core_commit_memory_region(struct kvm *kvm, 858 struct kvm_memory_slot *old, 859 const struct kvm_memory_slot *new, 860 enum kvm_mr_change change) 861 { 862 kvm->arch.kvm_ops->commit_memory_region(kvm, old, new, change); 863 } 864 865 bool kvm_unmap_gfn_range(struct kvm *kvm, struct kvm_gfn_range *range) 866 { 867 return kvm->arch.kvm_ops->unmap_gfn_range(kvm, range); 868 } 869 870 bool kvm_age_gfn(struct kvm *kvm, struct kvm_gfn_range *range) 871 { 872 return kvm->arch.kvm_ops->age_gfn(kvm, range); 873 } 874 875 bool kvm_test_age_gfn(struct kvm *kvm, struct kvm_gfn_range *range) 876 { 877 return kvm->arch.kvm_ops->test_age_gfn(kvm, range); 878 } 879 880 bool kvm_set_spte_gfn(struct kvm *kvm, struct kvm_gfn_range *range) 881 { 882 return kvm->arch.kvm_ops->set_spte_gfn(kvm, range); 883 } 884 885 int kvmppc_core_init_vm(struct kvm *kvm) 886 { 887 888 #ifdef CONFIG_PPC64 889 INIT_LIST_HEAD_RCU(&kvm->arch.spapr_tce_tables); 890 INIT_LIST_HEAD(&kvm->arch.rtas_tokens); 891 mutex_init(&kvm->arch.rtas_token_lock); 892 #endif 893 894 return kvm->arch.kvm_ops->init_vm(kvm); 895 } 896 897 void kvmppc_core_destroy_vm(struct kvm *kvm) 898 { 899 kvm->arch.kvm_ops->destroy_vm(kvm); 900 901 #ifdef CONFIG_PPC64 902 kvmppc_rtas_tokens_free(kvm); 903 WARN_ON(!list_empty(&kvm->arch.spapr_tce_tables)); 904 #endif 905 906 #ifdef CONFIG_KVM_XICS 907 /* 908 * Free the XIVE and XICS devices which are not directly freed by the 909 * device 'release' method 910 */ 911 kfree(kvm->arch.xive_devices.native); 912 kvm->arch.xive_devices.native = NULL; 913 kfree(kvm->arch.xive_devices.xics_on_xive); 914 kvm->arch.xive_devices.xics_on_xive = NULL; 915 kfree(kvm->arch.xics_device); 916 kvm->arch.xics_device = NULL; 917 #endif /* CONFIG_KVM_XICS */ 918 } 919 920 int kvmppc_h_logical_ci_load(struct kvm_vcpu *vcpu) 921 { 922 unsigned long size = kvmppc_get_gpr(vcpu, 4); 923 unsigned long addr = kvmppc_get_gpr(vcpu, 5); 924 u64 buf; 925 int srcu_idx; 926 int ret; 927 928 if (!is_power_of_2(size) || (size > sizeof(buf))) 929 return H_TOO_HARD; 930 931 srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); 932 ret = kvm_io_bus_read(vcpu, KVM_MMIO_BUS, addr, size, &buf); 933 srcu_read_unlock(&vcpu->kvm->srcu, srcu_idx); 934 if (ret != 0) 935 return H_TOO_HARD; 936 937 switch (size) { 938 case 1: 939 kvmppc_set_gpr(vcpu, 4, *(u8 *)&buf); 940 break; 941 942 case 2: 943 kvmppc_set_gpr(vcpu, 4, be16_to_cpu(*(__be16 *)&buf)); 944 break; 945 946 case 4: 947 kvmppc_set_gpr(vcpu, 4, be32_to_cpu(*(__be32 *)&buf)); 948 break; 949 950 case 8: 951 kvmppc_set_gpr(vcpu, 4, be64_to_cpu(*(__be64 *)&buf)); 952 break; 953 954 default: 955 BUG(); 956 } 957 958 return H_SUCCESS; 959 } 960 EXPORT_SYMBOL_GPL(kvmppc_h_logical_ci_load); 961 962 int kvmppc_h_logical_ci_store(struct kvm_vcpu *vcpu) 963 { 964 unsigned long size = kvmppc_get_gpr(vcpu, 4); 965 unsigned long addr = kvmppc_get_gpr(vcpu, 5); 966 unsigned long val = kvmppc_get_gpr(vcpu, 6); 967 u64 buf; 968 int srcu_idx; 969 int ret; 970 971 switch (size) { 972 case 1: 973 *(u8 *)&buf = val; 974 break; 975 976 case 2: 977 *(__be16 *)&buf = cpu_to_be16(val); 978 break; 979 980 case 4: 981 *(__be32 *)&buf = cpu_to_be32(val); 982 break; 983 984 case 8: 985 *(__be64 *)&buf = cpu_to_be64(val); 986 break; 987 988 default: 989 return H_TOO_HARD; 990 } 991 992 srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); 993 ret = kvm_io_bus_write(vcpu, KVM_MMIO_BUS, addr, size, &buf); 994 srcu_read_unlock(&vcpu->kvm->srcu, srcu_idx); 995 if (ret != 0) 996 return H_TOO_HARD; 997 998 return H_SUCCESS; 999 } 1000 EXPORT_SYMBOL_GPL(kvmppc_h_logical_ci_store); 1001 1002 int kvmppc_core_check_processor_compat(void) 1003 { 1004 /* 1005 * We always return 0 for book3s. We check 1006 * for compatibility while loading the HV 1007 * or PR module 1008 */ 1009 return 0; 1010 } 1011 1012 int kvmppc_book3s_hcall_implemented(struct kvm *kvm, unsigned long hcall) 1013 { 1014 return kvm->arch.kvm_ops->hcall_implemented(hcall); 1015 } 1016 1017 #ifdef CONFIG_KVM_XICS 1018 int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level, 1019 bool line_status) 1020 { 1021 if (xics_on_xive()) 1022 return kvmppc_xive_set_irq(kvm, irq_source_id, irq, level, 1023 line_status); 1024 else 1025 return kvmppc_xics_set_irq(kvm, irq_source_id, irq, level, 1026 line_status); 1027 } 1028 1029 int kvm_arch_set_irq_inatomic(struct kvm_kernel_irq_routing_entry *irq_entry, 1030 struct kvm *kvm, int irq_source_id, 1031 int level, bool line_status) 1032 { 1033 return kvm_set_irq(kvm, irq_source_id, irq_entry->gsi, 1034 level, line_status); 1035 } 1036 static int kvmppc_book3s_set_irq(struct kvm_kernel_irq_routing_entry *e, 1037 struct kvm *kvm, int irq_source_id, int level, 1038 bool line_status) 1039 { 1040 return kvm_set_irq(kvm, irq_source_id, e->gsi, level, line_status); 1041 } 1042 1043 int kvm_irq_map_gsi(struct kvm *kvm, 1044 struct kvm_kernel_irq_routing_entry *entries, int gsi) 1045 { 1046 entries->gsi = gsi; 1047 entries->type = KVM_IRQ_ROUTING_IRQCHIP; 1048 entries->set = kvmppc_book3s_set_irq; 1049 entries->irqchip.irqchip = 0; 1050 entries->irqchip.pin = gsi; 1051 return 1; 1052 } 1053 1054 int kvm_irq_map_chip_pin(struct kvm *kvm, unsigned irqchip, unsigned pin) 1055 { 1056 return pin; 1057 } 1058 1059 #endif /* CONFIG_KVM_XICS */ 1060 1061 static int kvmppc_book3s_init(void) 1062 { 1063 int r; 1064 1065 r = kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE); 1066 if (r) 1067 return r; 1068 #ifdef CONFIG_KVM_BOOK3S_32_HANDLER 1069 r = kvmppc_book3s_init_pr(); 1070 #endif 1071 1072 #ifdef CONFIG_KVM_XICS 1073 #ifdef CONFIG_KVM_XIVE 1074 if (xics_on_xive()) { 1075 kvm_register_device_ops(&kvm_xive_ops, KVM_DEV_TYPE_XICS); 1076 if (kvmppc_xive_native_supported()) 1077 kvm_register_device_ops(&kvm_xive_native_ops, 1078 KVM_DEV_TYPE_XIVE); 1079 } else 1080 #endif 1081 kvm_register_device_ops(&kvm_xics_ops, KVM_DEV_TYPE_XICS); 1082 #endif 1083 return r; 1084 } 1085 1086 static void kvmppc_book3s_exit(void) 1087 { 1088 #ifdef CONFIG_KVM_BOOK3S_32_HANDLER 1089 kvmppc_book3s_exit_pr(); 1090 #endif 1091 kvm_exit(); 1092 } 1093 1094 module_init(kvmppc_book3s_init); 1095 module_exit(kvmppc_book3s_exit); 1096 1097 /* On 32bit this is our one and only kernel module */ 1098 #ifdef CONFIG_KVM_BOOK3S_32_HANDLER 1099 MODULE_ALIAS_MISCDEV(KVM_MINOR); 1100 MODULE_ALIAS("devname:kvm"); 1101 #endif 1102