1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * 4 * Copyright IBM Corp. 2007 5 * Copyright 2010-2011 Freescale Semiconductor, Inc. 6 * 7 * Authors: Hollis Blanchard <hollisb@us.ibm.com> 8 * Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com> 9 * Scott Wood <scottwood@freescale.com> 10 * Varun Sethi <varun.sethi@freescale.com> 11 */ 12 13 #include <linux/errno.h> 14 #include <linux/err.h> 15 #include <linux/kvm_host.h> 16 #include <linux/gfp.h> 17 #include <linux/module.h> 18 #include <linux/vmalloc.h> 19 #include <linux/fs.h> 20 21 #include <asm/cputable.h> 22 #include <linux/uaccess.h> 23 #include <asm/interrupt.h> 24 #include <asm/kvm_ppc.h> 25 #include <asm/cacheflush.h> 26 #include <asm/dbell.h> 27 #include <asm/hw_irq.h> 28 #include <asm/irq.h> 29 #include <asm/time.h> 30 31 #include "timing.h" 32 #include "booke.h" 33 34 #define CREATE_TRACE_POINTS 35 #include "trace_booke.h" 36 37 unsigned long kvmppc_booke_handlers; 38 39 const struct _kvm_stats_desc kvm_vm_stats_desc[] = { 40 KVM_GENERIC_VM_STATS(), 41 STATS_DESC_ICOUNTER(VM, num_2M_pages), 42 STATS_DESC_ICOUNTER(VM, num_1G_pages) 43 }; 44 45 const struct kvm_stats_header kvm_vm_stats_header = { 46 .name_size = KVM_STATS_NAME_SIZE, 47 .num_desc = ARRAY_SIZE(kvm_vm_stats_desc), 48 .id_offset = sizeof(struct kvm_stats_header), 49 .desc_offset = sizeof(struct kvm_stats_header) + KVM_STATS_NAME_SIZE, 50 .data_offset = sizeof(struct kvm_stats_header) + KVM_STATS_NAME_SIZE + 51 sizeof(kvm_vm_stats_desc), 52 }; 53 54 const struct _kvm_stats_desc kvm_vcpu_stats_desc[] = { 55 KVM_GENERIC_VCPU_STATS(), 56 STATS_DESC_COUNTER(VCPU, sum_exits), 57 STATS_DESC_COUNTER(VCPU, mmio_exits), 58 STATS_DESC_COUNTER(VCPU, signal_exits), 59 STATS_DESC_COUNTER(VCPU, light_exits), 60 STATS_DESC_COUNTER(VCPU, itlb_real_miss_exits), 61 STATS_DESC_COUNTER(VCPU, itlb_virt_miss_exits), 62 STATS_DESC_COUNTER(VCPU, dtlb_real_miss_exits), 63 STATS_DESC_COUNTER(VCPU, dtlb_virt_miss_exits), 64 STATS_DESC_COUNTER(VCPU, syscall_exits), 65 STATS_DESC_COUNTER(VCPU, isi_exits), 66 STATS_DESC_COUNTER(VCPU, dsi_exits), 67 STATS_DESC_COUNTER(VCPU, emulated_inst_exits), 68 STATS_DESC_COUNTER(VCPU, dec_exits), 69 STATS_DESC_COUNTER(VCPU, ext_intr_exits), 70 STATS_DESC_COUNTER(VCPU, halt_successful_wait), 71 STATS_DESC_COUNTER(VCPU, dbell_exits), 72 STATS_DESC_COUNTER(VCPU, gdbell_exits), 73 STATS_DESC_COUNTER(VCPU, ld), 74 STATS_DESC_COUNTER(VCPU, st), 75 STATS_DESC_COUNTER(VCPU, pthru_all), 76 STATS_DESC_COUNTER(VCPU, pthru_host), 77 STATS_DESC_COUNTER(VCPU, pthru_bad_aff) 78 }; 79 80 const struct kvm_stats_header kvm_vcpu_stats_header = { 81 .name_size = KVM_STATS_NAME_SIZE, 82 .num_desc = ARRAY_SIZE(kvm_vcpu_stats_desc), 83 .id_offset = sizeof(struct kvm_stats_header), 84 .desc_offset = sizeof(struct kvm_stats_header) + KVM_STATS_NAME_SIZE, 85 .data_offset = sizeof(struct kvm_stats_header) + KVM_STATS_NAME_SIZE + 86 sizeof(kvm_vcpu_stats_desc), 87 }; 88 89 /* TODO: use vcpu_printf() */ 90 void kvmppc_dump_vcpu(struct kvm_vcpu *vcpu) 91 { 92 int i; 93 94 printk("pc: %08lx msr: %08llx\n", vcpu->arch.regs.nip, 95 vcpu->arch.shared->msr); 96 printk("lr: %08lx ctr: %08lx\n", vcpu->arch.regs.link, 97 vcpu->arch.regs.ctr); 98 printk("srr0: %08llx srr1: %08llx\n", vcpu->arch.shared->srr0, 99 vcpu->arch.shared->srr1); 100 101 printk("exceptions: %08lx\n", vcpu->arch.pending_exceptions); 102 103 for (i = 0; i < 32; i += 4) { 104 printk("gpr%02d: %08lx %08lx %08lx %08lx\n", i, 105 kvmppc_get_gpr(vcpu, i), 106 kvmppc_get_gpr(vcpu, i+1), 107 kvmppc_get_gpr(vcpu, i+2), 108 kvmppc_get_gpr(vcpu, i+3)); 109 } 110 } 111 112 #ifdef CONFIG_SPE 113 void kvmppc_vcpu_disable_spe(struct kvm_vcpu *vcpu) 114 { 115 preempt_disable(); 116 enable_kernel_spe(); 117 kvmppc_save_guest_spe(vcpu); 118 disable_kernel_spe(); 119 vcpu->arch.shadow_msr &= ~MSR_SPE; 120 preempt_enable(); 121 } 122 123 static void kvmppc_vcpu_enable_spe(struct kvm_vcpu *vcpu) 124 { 125 preempt_disable(); 126 enable_kernel_spe(); 127 kvmppc_load_guest_spe(vcpu); 128 disable_kernel_spe(); 129 vcpu->arch.shadow_msr |= MSR_SPE; 130 preempt_enable(); 131 } 132 133 static void kvmppc_vcpu_sync_spe(struct kvm_vcpu *vcpu) 134 { 135 if (vcpu->arch.shared->msr & MSR_SPE) { 136 if (!(vcpu->arch.shadow_msr & MSR_SPE)) 137 kvmppc_vcpu_enable_spe(vcpu); 138 } else if (vcpu->arch.shadow_msr & MSR_SPE) { 139 kvmppc_vcpu_disable_spe(vcpu); 140 } 141 } 142 #else 143 static void kvmppc_vcpu_sync_spe(struct kvm_vcpu *vcpu) 144 { 145 } 146 #endif 147 148 /* 149 * Load up guest vcpu FP state if it's needed. 150 * It also set the MSR_FP in thread so that host know 151 * we're holding FPU, and then host can help to save 152 * guest vcpu FP state if other threads require to use FPU. 153 * This simulates an FP unavailable fault. 154 * 155 * It requires to be called with preemption disabled. 156 */ 157 static inline void kvmppc_load_guest_fp(struct kvm_vcpu *vcpu) 158 { 159 #ifdef CONFIG_PPC_FPU 160 if (!(current->thread.regs->msr & MSR_FP)) { 161 enable_kernel_fp(); 162 load_fp_state(&vcpu->arch.fp); 163 disable_kernel_fp(); 164 current->thread.fp_save_area = &vcpu->arch.fp; 165 current->thread.regs->msr |= MSR_FP; 166 } 167 #endif 168 } 169 170 /* 171 * Save guest vcpu FP state into thread. 172 * It requires to be called with preemption disabled. 173 */ 174 static inline void kvmppc_save_guest_fp(struct kvm_vcpu *vcpu) 175 { 176 #ifdef CONFIG_PPC_FPU 177 if (current->thread.regs->msr & MSR_FP) 178 giveup_fpu(current); 179 current->thread.fp_save_area = NULL; 180 #endif 181 } 182 183 static void kvmppc_vcpu_sync_fpu(struct kvm_vcpu *vcpu) 184 { 185 #if defined(CONFIG_PPC_FPU) && !defined(CONFIG_KVM_BOOKE_HV) 186 /* We always treat the FP bit as enabled from the host 187 perspective, so only need to adjust the shadow MSR */ 188 vcpu->arch.shadow_msr &= ~MSR_FP; 189 vcpu->arch.shadow_msr |= vcpu->arch.shared->msr & MSR_FP; 190 #endif 191 } 192 193 /* 194 * Simulate AltiVec unavailable fault to load guest state 195 * from thread to AltiVec unit. 196 * It requires to be called with preemption disabled. 197 */ 198 static inline void kvmppc_load_guest_altivec(struct kvm_vcpu *vcpu) 199 { 200 #ifdef CONFIG_ALTIVEC 201 if (cpu_has_feature(CPU_FTR_ALTIVEC)) { 202 if (!(current->thread.regs->msr & MSR_VEC)) { 203 enable_kernel_altivec(); 204 load_vr_state(&vcpu->arch.vr); 205 disable_kernel_altivec(); 206 current->thread.vr_save_area = &vcpu->arch.vr; 207 current->thread.regs->msr |= MSR_VEC; 208 } 209 } 210 #endif 211 } 212 213 /* 214 * Save guest vcpu AltiVec state into thread. 215 * It requires to be called with preemption disabled. 216 */ 217 static inline void kvmppc_save_guest_altivec(struct kvm_vcpu *vcpu) 218 { 219 #ifdef CONFIG_ALTIVEC 220 if (cpu_has_feature(CPU_FTR_ALTIVEC)) { 221 if (current->thread.regs->msr & MSR_VEC) 222 giveup_altivec(current); 223 current->thread.vr_save_area = NULL; 224 } 225 #endif 226 } 227 228 static void kvmppc_vcpu_sync_debug(struct kvm_vcpu *vcpu) 229 { 230 /* Synchronize guest's desire to get debug interrupts into shadow MSR */ 231 #ifndef CONFIG_KVM_BOOKE_HV 232 vcpu->arch.shadow_msr &= ~MSR_DE; 233 vcpu->arch.shadow_msr |= vcpu->arch.shared->msr & MSR_DE; 234 #endif 235 236 /* Force enable debug interrupts when user space wants to debug */ 237 if (vcpu->guest_debug) { 238 #ifdef CONFIG_KVM_BOOKE_HV 239 /* 240 * Since there is no shadow MSR, sync MSR_DE into the guest 241 * visible MSR. 242 */ 243 vcpu->arch.shared->msr |= MSR_DE; 244 #else 245 vcpu->arch.shadow_msr |= MSR_DE; 246 vcpu->arch.shared->msr &= ~MSR_DE; 247 #endif 248 } 249 } 250 251 /* 252 * Helper function for "full" MSR writes. No need to call this if only 253 * EE/CE/ME/DE/RI are changing. 254 */ 255 void kvmppc_set_msr(struct kvm_vcpu *vcpu, u32 new_msr) 256 { 257 u32 old_msr = vcpu->arch.shared->msr; 258 259 #ifdef CONFIG_KVM_BOOKE_HV 260 new_msr |= MSR_GS; 261 #endif 262 263 vcpu->arch.shared->msr = new_msr; 264 265 kvmppc_mmu_msr_notify(vcpu, old_msr); 266 kvmppc_vcpu_sync_spe(vcpu); 267 kvmppc_vcpu_sync_fpu(vcpu); 268 kvmppc_vcpu_sync_debug(vcpu); 269 } 270 271 static void kvmppc_booke_queue_irqprio(struct kvm_vcpu *vcpu, 272 unsigned int priority) 273 { 274 trace_kvm_booke_queue_irqprio(vcpu, priority); 275 set_bit(priority, &vcpu->arch.pending_exceptions); 276 } 277 278 void kvmppc_core_queue_dtlb_miss(struct kvm_vcpu *vcpu, 279 ulong dear_flags, ulong esr_flags) 280 { 281 vcpu->arch.queued_dear = dear_flags; 282 vcpu->arch.queued_esr = esr_flags; 283 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DTLB_MISS); 284 } 285 286 void kvmppc_core_queue_data_storage(struct kvm_vcpu *vcpu, 287 ulong dear_flags, ulong esr_flags) 288 { 289 vcpu->arch.queued_dear = dear_flags; 290 vcpu->arch.queued_esr = esr_flags; 291 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DATA_STORAGE); 292 } 293 294 void kvmppc_core_queue_itlb_miss(struct kvm_vcpu *vcpu) 295 { 296 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ITLB_MISS); 297 } 298 299 void kvmppc_core_queue_inst_storage(struct kvm_vcpu *vcpu, ulong esr_flags) 300 { 301 vcpu->arch.queued_esr = esr_flags; 302 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_INST_STORAGE); 303 } 304 305 static void kvmppc_core_queue_alignment(struct kvm_vcpu *vcpu, ulong dear_flags, 306 ulong esr_flags) 307 { 308 vcpu->arch.queued_dear = dear_flags; 309 vcpu->arch.queued_esr = esr_flags; 310 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ALIGNMENT); 311 } 312 313 void kvmppc_core_queue_program(struct kvm_vcpu *vcpu, ulong esr_flags) 314 { 315 vcpu->arch.queued_esr = esr_flags; 316 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_PROGRAM); 317 } 318 319 void kvmppc_core_queue_fpunavail(struct kvm_vcpu *vcpu) 320 { 321 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_FP_UNAVAIL); 322 } 323 324 #ifdef CONFIG_ALTIVEC 325 void kvmppc_core_queue_vec_unavail(struct kvm_vcpu *vcpu) 326 { 327 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ALTIVEC_UNAVAIL); 328 } 329 #endif 330 331 void kvmppc_core_queue_dec(struct kvm_vcpu *vcpu) 332 { 333 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DECREMENTER); 334 } 335 336 int kvmppc_core_pending_dec(struct kvm_vcpu *vcpu) 337 { 338 return test_bit(BOOKE_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions); 339 } 340 341 void kvmppc_core_dequeue_dec(struct kvm_vcpu *vcpu) 342 { 343 clear_bit(BOOKE_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions); 344 } 345 346 void kvmppc_core_queue_external(struct kvm_vcpu *vcpu, 347 struct kvm_interrupt *irq) 348 { 349 unsigned int prio = BOOKE_IRQPRIO_EXTERNAL; 350 351 if (irq->irq == KVM_INTERRUPT_SET_LEVEL) 352 prio = BOOKE_IRQPRIO_EXTERNAL_LEVEL; 353 354 kvmppc_booke_queue_irqprio(vcpu, prio); 355 } 356 357 void kvmppc_core_dequeue_external(struct kvm_vcpu *vcpu) 358 { 359 clear_bit(BOOKE_IRQPRIO_EXTERNAL, &vcpu->arch.pending_exceptions); 360 clear_bit(BOOKE_IRQPRIO_EXTERNAL_LEVEL, &vcpu->arch.pending_exceptions); 361 } 362 363 static void kvmppc_core_queue_watchdog(struct kvm_vcpu *vcpu) 364 { 365 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_WATCHDOG); 366 } 367 368 static void kvmppc_core_dequeue_watchdog(struct kvm_vcpu *vcpu) 369 { 370 clear_bit(BOOKE_IRQPRIO_WATCHDOG, &vcpu->arch.pending_exceptions); 371 } 372 373 void kvmppc_core_queue_debug(struct kvm_vcpu *vcpu) 374 { 375 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DEBUG); 376 } 377 378 void kvmppc_core_dequeue_debug(struct kvm_vcpu *vcpu) 379 { 380 clear_bit(BOOKE_IRQPRIO_DEBUG, &vcpu->arch.pending_exceptions); 381 } 382 383 static void set_guest_srr(struct kvm_vcpu *vcpu, unsigned long srr0, u32 srr1) 384 { 385 kvmppc_set_srr0(vcpu, srr0); 386 kvmppc_set_srr1(vcpu, srr1); 387 } 388 389 static void set_guest_csrr(struct kvm_vcpu *vcpu, unsigned long srr0, u32 srr1) 390 { 391 vcpu->arch.csrr0 = srr0; 392 vcpu->arch.csrr1 = srr1; 393 } 394 395 static void set_guest_dsrr(struct kvm_vcpu *vcpu, unsigned long srr0, u32 srr1) 396 { 397 if (cpu_has_feature(CPU_FTR_DEBUG_LVL_EXC)) { 398 vcpu->arch.dsrr0 = srr0; 399 vcpu->arch.dsrr1 = srr1; 400 } else { 401 set_guest_csrr(vcpu, srr0, srr1); 402 } 403 } 404 405 static void set_guest_mcsrr(struct kvm_vcpu *vcpu, unsigned long srr0, u32 srr1) 406 { 407 vcpu->arch.mcsrr0 = srr0; 408 vcpu->arch.mcsrr1 = srr1; 409 } 410 411 /* Deliver the interrupt of the corresponding priority, if possible. */ 412 static int kvmppc_booke_irqprio_deliver(struct kvm_vcpu *vcpu, 413 unsigned int priority) 414 { 415 int allowed = 0; 416 ulong msr_mask = 0; 417 bool update_esr = false, update_dear = false, update_epr = false; 418 ulong crit_raw = vcpu->arch.shared->critical; 419 ulong crit_r1 = kvmppc_get_gpr(vcpu, 1); 420 bool crit; 421 bool keep_irq = false; 422 enum int_class int_class; 423 ulong new_msr = vcpu->arch.shared->msr; 424 425 /* Truncate crit indicators in 32 bit mode */ 426 if (!(vcpu->arch.shared->msr & MSR_SF)) { 427 crit_raw &= 0xffffffff; 428 crit_r1 &= 0xffffffff; 429 } 430 431 /* Critical section when crit == r1 */ 432 crit = (crit_raw == crit_r1); 433 /* ... and we're in supervisor mode */ 434 crit = crit && !(vcpu->arch.shared->msr & MSR_PR); 435 436 if (priority == BOOKE_IRQPRIO_EXTERNAL_LEVEL) { 437 priority = BOOKE_IRQPRIO_EXTERNAL; 438 keep_irq = true; 439 } 440 441 if ((priority == BOOKE_IRQPRIO_EXTERNAL) && vcpu->arch.epr_flags) 442 update_epr = true; 443 444 switch (priority) { 445 case BOOKE_IRQPRIO_DTLB_MISS: 446 case BOOKE_IRQPRIO_DATA_STORAGE: 447 case BOOKE_IRQPRIO_ALIGNMENT: 448 update_dear = true; 449 fallthrough; 450 case BOOKE_IRQPRIO_INST_STORAGE: 451 case BOOKE_IRQPRIO_PROGRAM: 452 update_esr = true; 453 fallthrough; 454 case BOOKE_IRQPRIO_ITLB_MISS: 455 case BOOKE_IRQPRIO_SYSCALL: 456 case BOOKE_IRQPRIO_FP_UNAVAIL: 457 #ifdef CONFIG_SPE_POSSIBLE 458 case BOOKE_IRQPRIO_SPE_UNAVAIL: 459 case BOOKE_IRQPRIO_SPE_FP_DATA: 460 case BOOKE_IRQPRIO_SPE_FP_ROUND: 461 #endif 462 #ifdef CONFIG_ALTIVEC 463 case BOOKE_IRQPRIO_ALTIVEC_UNAVAIL: 464 case BOOKE_IRQPRIO_ALTIVEC_ASSIST: 465 #endif 466 case BOOKE_IRQPRIO_AP_UNAVAIL: 467 allowed = 1; 468 msr_mask = MSR_CE | MSR_ME | MSR_DE; 469 int_class = INT_CLASS_NONCRIT; 470 break; 471 case BOOKE_IRQPRIO_WATCHDOG: 472 case BOOKE_IRQPRIO_CRITICAL: 473 case BOOKE_IRQPRIO_DBELL_CRIT: 474 allowed = vcpu->arch.shared->msr & MSR_CE; 475 allowed = allowed && !crit; 476 msr_mask = MSR_ME; 477 int_class = INT_CLASS_CRIT; 478 break; 479 case BOOKE_IRQPRIO_MACHINE_CHECK: 480 allowed = vcpu->arch.shared->msr & MSR_ME; 481 allowed = allowed && !crit; 482 int_class = INT_CLASS_MC; 483 break; 484 case BOOKE_IRQPRIO_DECREMENTER: 485 case BOOKE_IRQPRIO_FIT: 486 keep_irq = true; 487 fallthrough; 488 case BOOKE_IRQPRIO_EXTERNAL: 489 case BOOKE_IRQPRIO_DBELL: 490 allowed = vcpu->arch.shared->msr & MSR_EE; 491 allowed = allowed && !crit; 492 msr_mask = MSR_CE | MSR_ME | MSR_DE; 493 int_class = INT_CLASS_NONCRIT; 494 break; 495 case BOOKE_IRQPRIO_DEBUG: 496 allowed = vcpu->arch.shared->msr & MSR_DE; 497 allowed = allowed && !crit; 498 msr_mask = MSR_ME; 499 if (cpu_has_feature(CPU_FTR_DEBUG_LVL_EXC)) 500 int_class = INT_CLASS_DBG; 501 else 502 int_class = INT_CLASS_CRIT; 503 504 break; 505 } 506 507 if (allowed) { 508 switch (int_class) { 509 case INT_CLASS_NONCRIT: 510 set_guest_srr(vcpu, vcpu->arch.regs.nip, 511 vcpu->arch.shared->msr); 512 break; 513 case INT_CLASS_CRIT: 514 set_guest_csrr(vcpu, vcpu->arch.regs.nip, 515 vcpu->arch.shared->msr); 516 break; 517 case INT_CLASS_DBG: 518 set_guest_dsrr(vcpu, vcpu->arch.regs.nip, 519 vcpu->arch.shared->msr); 520 break; 521 case INT_CLASS_MC: 522 set_guest_mcsrr(vcpu, vcpu->arch.regs.nip, 523 vcpu->arch.shared->msr); 524 break; 525 } 526 527 vcpu->arch.regs.nip = vcpu->arch.ivpr | 528 vcpu->arch.ivor[priority]; 529 if (update_esr) 530 kvmppc_set_esr(vcpu, vcpu->arch.queued_esr); 531 if (update_dear) 532 kvmppc_set_dar(vcpu, vcpu->arch.queued_dear); 533 if (update_epr) { 534 if (vcpu->arch.epr_flags & KVMPPC_EPR_USER) 535 kvm_make_request(KVM_REQ_EPR_EXIT, vcpu); 536 else if (vcpu->arch.epr_flags & KVMPPC_EPR_KERNEL) { 537 BUG_ON(vcpu->arch.irq_type != KVMPPC_IRQ_MPIC); 538 kvmppc_mpic_set_epr(vcpu); 539 } 540 } 541 542 new_msr &= msr_mask; 543 #if defined(CONFIG_64BIT) 544 if (vcpu->arch.epcr & SPRN_EPCR_ICM) 545 new_msr |= MSR_CM; 546 #endif 547 kvmppc_set_msr(vcpu, new_msr); 548 549 if (!keep_irq) 550 clear_bit(priority, &vcpu->arch.pending_exceptions); 551 } 552 553 #ifdef CONFIG_KVM_BOOKE_HV 554 /* 555 * If an interrupt is pending but masked, raise a guest doorbell 556 * so that we are notified when the guest enables the relevant 557 * MSR bit. 558 */ 559 if (vcpu->arch.pending_exceptions & BOOKE_IRQMASK_EE) 560 kvmppc_set_pending_interrupt(vcpu, INT_CLASS_NONCRIT); 561 if (vcpu->arch.pending_exceptions & BOOKE_IRQMASK_CE) 562 kvmppc_set_pending_interrupt(vcpu, INT_CLASS_CRIT); 563 if (vcpu->arch.pending_exceptions & BOOKE_IRQPRIO_MACHINE_CHECK) 564 kvmppc_set_pending_interrupt(vcpu, INT_CLASS_MC); 565 #endif 566 567 return allowed; 568 } 569 570 /* 571 * Return the number of jiffies until the next timeout. If the timeout is 572 * longer than the NEXT_TIMER_MAX_DELTA, then return NEXT_TIMER_MAX_DELTA 573 * because the larger value can break the timer APIs. 574 */ 575 static unsigned long watchdog_next_timeout(struct kvm_vcpu *vcpu) 576 { 577 u64 tb, wdt_tb, wdt_ticks = 0; 578 u64 nr_jiffies = 0; 579 u32 period = TCR_GET_WP(vcpu->arch.tcr); 580 581 wdt_tb = 1ULL << (63 - period); 582 tb = get_tb(); 583 /* 584 * The watchdog timeout will hapeen when TB bit corresponding 585 * to watchdog will toggle from 0 to 1. 586 */ 587 if (tb & wdt_tb) 588 wdt_ticks = wdt_tb; 589 590 wdt_ticks += wdt_tb - (tb & (wdt_tb - 1)); 591 592 /* Convert timebase ticks to jiffies */ 593 nr_jiffies = wdt_ticks; 594 595 if (do_div(nr_jiffies, tb_ticks_per_jiffy)) 596 nr_jiffies++; 597 598 return min_t(unsigned long long, nr_jiffies, NEXT_TIMER_MAX_DELTA); 599 } 600 601 static void arm_next_watchdog(struct kvm_vcpu *vcpu) 602 { 603 unsigned long nr_jiffies; 604 unsigned long flags; 605 606 /* 607 * If TSR_ENW and TSR_WIS are not set then no need to exit to 608 * userspace, so clear the KVM_REQ_WATCHDOG request. 609 */ 610 if ((vcpu->arch.tsr & (TSR_ENW | TSR_WIS)) != (TSR_ENW | TSR_WIS)) 611 kvm_clear_request(KVM_REQ_WATCHDOG, vcpu); 612 613 spin_lock_irqsave(&vcpu->arch.wdt_lock, flags); 614 nr_jiffies = watchdog_next_timeout(vcpu); 615 /* 616 * If the number of jiffies of watchdog timer >= NEXT_TIMER_MAX_DELTA 617 * then do not run the watchdog timer as this can break timer APIs. 618 */ 619 if (nr_jiffies < NEXT_TIMER_MAX_DELTA) 620 mod_timer(&vcpu->arch.wdt_timer, jiffies + nr_jiffies); 621 else 622 del_timer(&vcpu->arch.wdt_timer); 623 spin_unlock_irqrestore(&vcpu->arch.wdt_lock, flags); 624 } 625 626 void kvmppc_watchdog_func(struct timer_list *t) 627 { 628 struct kvm_vcpu *vcpu = from_timer(vcpu, t, arch.wdt_timer); 629 u32 tsr, new_tsr; 630 int final; 631 632 do { 633 new_tsr = tsr = vcpu->arch.tsr; 634 final = 0; 635 636 /* Time out event */ 637 if (tsr & TSR_ENW) { 638 if (tsr & TSR_WIS) 639 final = 1; 640 else 641 new_tsr = tsr | TSR_WIS; 642 } else { 643 new_tsr = tsr | TSR_ENW; 644 } 645 } while (cmpxchg(&vcpu->arch.tsr, tsr, new_tsr) != tsr); 646 647 if (new_tsr & TSR_WIS) { 648 smp_wmb(); 649 kvm_make_request(KVM_REQ_PENDING_TIMER, vcpu); 650 kvm_vcpu_kick(vcpu); 651 } 652 653 /* 654 * If this is final watchdog expiry and some action is required 655 * then exit to userspace. 656 */ 657 if (final && (vcpu->arch.tcr & TCR_WRC_MASK) && 658 vcpu->arch.watchdog_enabled) { 659 smp_wmb(); 660 kvm_make_request(KVM_REQ_WATCHDOG, vcpu); 661 kvm_vcpu_kick(vcpu); 662 } 663 664 /* 665 * Stop running the watchdog timer after final expiration to 666 * prevent the host from being flooded with timers if the 667 * guest sets a short period. 668 * Timers will resume when TSR/TCR is updated next time. 669 */ 670 if (!final) 671 arm_next_watchdog(vcpu); 672 } 673 674 static void update_timer_ints(struct kvm_vcpu *vcpu) 675 { 676 if ((vcpu->arch.tcr & TCR_DIE) && (vcpu->arch.tsr & TSR_DIS)) 677 kvmppc_core_queue_dec(vcpu); 678 else 679 kvmppc_core_dequeue_dec(vcpu); 680 681 if ((vcpu->arch.tcr & TCR_WIE) && (vcpu->arch.tsr & TSR_WIS)) 682 kvmppc_core_queue_watchdog(vcpu); 683 else 684 kvmppc_core_dequeue_watchdog(vcpu); 685 } 686 687 static void kvmppc_core_check_exceptions(struct kvm_vcpu *vcpu) 688 { 689 unsigned long *pending = &vcpu->arch.pending_exceptions; 690 unsigned int priority; 691 692 priority = __ffs(*pending); 693 while (priority < BOOKE_IRQPRIO_MAX) { 694 if (kvmppc_booke_irqprio_deliver(vcpu, priority)) 695 break; 696 697 priority = find_next_bit(pending, 698 BITS_PER_BYTE * sizeof(*pending), 699 priority + 1); 700 } 701 702 /* Tell the guest about our interrupt status */ 703 vcpu->arch.shared->int_pending = !!*pending; 704 } 705 706 /* Check pending exceptions and deliver one, if possible. */ 707 int kvmppc_core_prepare_to_enter(struct kvm_vcpu *vcpu) 708 { 709 int r = 0; 710 WARN_ON_ONCE(!irqs_disabled()); 711 712 kvmppc_core_check_exceptions(vcpu); 713 714 if (kvm_request_pending(vcpu)) { 715 /* Exception delivery raised request; start over */ 716 return 1; 717 } 718 719 if (vcpu->arch.shared->msr & MSR_WE) { 720 local_irq_enable(); 721 kvm_vcpu_block(vcpu); 722 kvm_clear_request(KVM_REQ_UNHALT, vcpu); 723 hard_irq_disable(); 724 725 kvmppc_set_exit_type(vcpu, EMULATED_MTMSRWE_EXITS); 726 r = 1; 727 } 728 729 return r; 730 } 731 732 int kvmppc_core_check_requests(struct kvm_vcpu *vcpu) 733 { 734 int r = 1; /* Indicate we want to get back into the guest */ 735 736 if (kvm_check_request(KVM_REQ_PENDING_TIMER, vcpu)) 737 update_timer_ints(vcpu); 738 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC) 739 if (kvm_check_request(KVM_REQ_TLB_FLUSH, vcpu)) 740 kvmppc_core_flush_tlb(vcpu); 741 #endif 742 743 if (kvm_check_request(KVM_REQ_WATCHDOG, vcpu)) { 744 vcpu->run->exit_reason = KVM_EXIT_WATCHDOG; 745 r = 0; 746 } 747 748 if (kvm_check_request(KVM_REQ_EPR_EXIT, vcpu)) { 749 vcpu->run->epr.epr = 0; 750 vcpu->arch.epr_needed = true; 751 vcpu->run->exit_reason = KVM_EXIT_EPR; 752 r = 0; 753 } 754 755 return r; 756 } 757 758 int kvmppc_vcpu_run(struct kvm_vcpu *vcpu) 759 { 760 int ret, s; 761 struct debug_reg debug; 762 763 if (!vcpu->arch.sane) { 764 vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR; 765 return -EINVAL; 766 } 767 768 s = kvmppc_prepare_to_enter(vcpu); 769 if (s <= 0) { 770 ret = s; 771 goto out; 772 } 773 /* interrupts now hard-disabled */ 774 775 #ifdef CONFIG_PPC_FPU 776 /* Save userspace FPU state in stack */ 777 enable_kernel_fp(); 778 779 /* 780 * Since we can't trap on MSR_FP in GS-mode, we consider the guest 781 * as always using the FPU. 782 */ 783 kvmppc_load_guest_fp(vcpu); 784 #endif 785 786 #ifdef CONFIG_ALTIVEC 787 /* Save userspace AltiVec state in stack */ 788 if (cpu_has_feature(CPU_FTR_ALTIVEC)) 789 enable_kernel_altivec(); 790 /* 791 * Since we can't trap on MSR_VEC in GS-mode, we consider the guest 792 * as always using the AltiVec. 793 */ 794 kvmppc_load_guest_altivec(vcpu); 795 #endif 796 797 /* Switch to guest debug context */ 798 debug = vcpu->arch.dbg_reg; 799 switch_booke_debug_regs(&debug); 800 debug = current->thread.debug; 801 current->thread.debug = vcpu->arch.dbg_reg; 802 803 vcpu->arch.pgdir = vcpu->kvm->mm->pgd; 804 kvmppc_fix_ee_before_entry(); 805 806 ret = __kvmppc_vcpu_run(vcpu); 807 808 /* No need for guest_exit. It's done in handle_exit. 809 We also get here with interrupts enabled. */ 810 811 /* Switch back to user space debug context */ 812 switch_booke_debug_regs(&debug); 813 current->thread.debug = debug; 814 815 #ifdef CONFIG_PPC_FPU 816 kvmppc_save_guest_fp(vcpu); 817 #endif 818 819 #ifdef CONFIG_ALTIVEC 820 kvmppc_save_guest_altivec(vcpu); 821 #endif 822 823 out: 824 vcpu->mode = OUTSIDE_GUEST_MODE; 825 return ret; 826 } 827 828 static int emulation_exit(struct kvm_vcpu *vcpu) 829 { 830 enum emulation_result er; 831 832 er = kvmppc_emulate_instruction(vcpu); 833 switch (er) { 834 case EMULATE_DONE: 835 /* don't overwrite subtypes, just account kvm_stats */ 836 kvmppc_account_exit_stat(vcpu, EMULATED_INST_EXITS); 837 /* Future optimization: only reload non-volatiles if 838 * they were actually modified by emulation. */ 839 return RESUME_GUEST_NV; 840 841 case EMULATE_AGAIN: 842 return RESUME_GUEST; 843 844 case EMULATE_FAIL: 845 printk(KERN_CRIT "%s: emulation at %lx failed (%08x)\n", 846 __func__, vcpu->arch.regs.nip, vcpu->arch.last_inst); 847 /* For debugging, encode the failing instruction and 848 * report it to userspace. */ 849 vcpu->run->hw.hardware_exit_reason = ~0ULL << 32; 850 vcpu->run->hw.hardware_exit_reason |= vcpu->arch.last_inst; 851 kvmppc_core_queue_program(vcpu, ESR_PIL); 852 return RESUME_HOST; 853 854 case EMULATE_EXIT_USER: 855 return RESUME_HOST; 856 857 default: 858 BUG(); 859 } 860 } 861 862 static int kvmppc_handle_debug(struct kvm_vcpu *vcpu) 863 { 864 struct kvm_run *run = vcpu->run; 865 struct debug_reg *dbg_reg = &(vcpu->arch.dbg_reg); 866 u32 dbsr = vcpu->arch.dbsr; 867 868 if (vcpu->guest_debug == 0) { 869 /* 870 * Debug resources belong to Guest. 871 * Imprecise debug event is not injected 872 */ 873 if (dbsr & DBSR_IDE) { 874 dbsr &= ~DBSR_IDE; 875 if (!dbsr) 876 return RESUME_GUEST; 877 } 878 879 if (dbsr && (vcpu->arch.shared->msr & MSR_DE) && 880 (vcpu->arch.dbg_reg.dbcr0 & DBCR0_IDM)) 881 kvmppc_core_queue_debug(vcpu); 882 883 /* Inject a program interrupt if trap debug is not allowed */ 884 if ((dbsr & DBSR_TIE) && !(vcpu->arch.shared->msr & MSR_DE)) 885 kvmppc_core_queue_program(vcpu, ESR_PTR); 886 887 return RESUME_GUEST; 888 } 889 890 /* 891 * Debug resource owned by userspace. 892 * Clear guest dbsr (vcpu->arch.dbsr) 893 */ 894 vcpu->arch.dbsr = 0; 895 run->debug.arch.status = 0; 896 run->debug.arch.address = vcpu->arch.regs.nip; 897 898 if (dbsr & (DBSR_IAC1 | DBSR_IAC2 | DBSR_IAC3 | DBSR_IAC4)) { 899 run->debug.arch.status |= KVMPPC_DEBUG_BREAKPOINT; 900 } else { 901 if (dbsr & (DBSR_DAC1W | DBSR_DAC2W)) 902 run->debug.arch.status |= KVMPPC_DEBUG_WATCH_WRITE; 903 else if (dbsr & (DBSR_DAC1R | DBSR_DAC2R)) 904 run->debug.arch.status |= KVMPPC_DEBUG_WATCH_READ; 905 if (dbsr & (DBSR_DAC1R | DBSR_DAC1W)) 906 run->debug.arch.address = dbg_reg->dac1; 907 else if (dbsr & (DBSR_DAC2R | DBSR_DAC2W)) 908 run->debug.arch.address = dbg_reg->dac2; 909 } 910 911 return RESUME_HOST; 912 } 913 914 static void kvmppc_fill_pt_regs(struct pt_regs *regs) 915 { 916 ulong r1, ip, msr, lr; 917 918 asm("mr %0, 1" : "=r"(r1)); 919 asm("mflr %0" : "=r"(lr)); 920 asm("mfmsr %0" : "=r"(msr)); 921 asm("bl 1f; 1: mflr %0" : "=r"(ip)); 922 923 memset(regs, 0, sizeof(*regs)); 924 regs->gpr[1] = r1; 925 regs->nip = ip; 926 regs->msr = msr; 927 regs->link = lr; 928 } 929 930 /* 931 * For interrupts needed to be handled by host interrupt handlers, 932 * corresponding host handler are called from here in similar way 933 * (but not exact) as they are called from low level handler 934 * (such as from arch/powerpc/kernel/head_fsl_booke.S). 935 */ 936 static void kvmppc_restart_interrupt(struct kvm_vcpu *vcpu, 937 unsigned int exit_nr) 938 { 939 struct pt_regs regs; 940 941 switch (exit_nr) { 942 case BOOKE_INTERRUPT_EXTERNAL: 943 kvmppc_fill_pt_regs(®s); 944 do_IRQ(®s); 945 break; 946 case BOOKE_INTERRUPT_DECREMENTER: 947 kvmppc_fill_pt_regs(®s); 948 timer_interrupt(®s); 949 break; 950 #if defined(CONFIG_PPC_DOORBELL) 951 case BOOKE_INTERRUPT_DOORBELL: 952 kvmppc_fill_pt_regs(®s); 953 doorbell_exception(®s); 954 break; 955 #endif 956 case BOOKE_INTERRUPT_MACHINE_CHECK: 957 /* FIXME */ 958 break; 959 case BOOKE_INTERRUPT_PERFORMANCE_MONITOR: 960 kvmppc_fill_pt_regs(®s); 961 performance_monitor_exception(®s); 962 break; 963 case BOOKE_INTERRUPT_WATCHDOG: 964 kvmppc_fill_pt_regs(®s); 965 #ifdef CONFIG_BOOKE_WDT 966 WatchdogException(®s); 967 #else 968 unknown_exception(®s); 969 #endif 970 break; 971 case BOOKE_INTERRUPT_CRITICAL: 972 kvmppc_fill_pt_regs(®s); 973 unknown_exception(®s); 974 break; 975 case BOOKE_INTERRUPT_DEBUG: 976 /* Save DBSR before preemption is enabled */ 977 vcpu->arch.dbsr = mfspr(SPRN_DBSR); 978 kvmppc_clear_dbsr(); 979 break; 980 } 981 } 982 983 static int kvmppc_resume_inst_load(struct kvm_vcpu *vcpu, 984 enum emulation_result emulated, u32 last_inst) 985 { 986 switch (emulated) { 987 case EMULATE_AGAIN: 988 return RESUME_GUEST; 989 990 case EMULATE_FAIL: 991 pr_debug("%s: load instruction from guest address %lx failed\n", 992 __func__, vcpu->arch.regs.nip); 993 /* For debugging, encode the failing instruction and 994 * report it to userspace. */ 995 vcpu->run->hw.hardware_exit_reason = ~0ULL << 32; 996 vcpu->run->hw.hardware_exit_reason |= last_inst; 997 kvmppc_core_queue_program(vcpu, ESR_PIL); 998 return RESUME_HOST; 999 1000 default: 1001 BUG(); 1002 } 1003 } 1004 1005 /** 1006 * kvmppc_handle_exit 1007 * 1008 * Return value is in the form (errcode<<2 | RESUME_FLAG_HOST | RESUME_FLAG_NV) 1009 */ 1010 int kvmppc_handle_exit(struct kvm_vcpu *vcpu, unsigned int exit_nr) 1011 { 1012 struct kvm_run *run = vcpu->run; 1013 int r = RESUME_HOST; 1014 int s; 1015 int idx; 1016 u32 last_inst = KVM_INST_FETCH_FAILED; 1017 enum emulation_result emulated = EMULATE_DONE; 1018 1019 /* update before a new last_exit_type is rewritten */ 1020 kvmppc_update_timing_stats(vcpu); 1021 1022 /* restart interrupts if they were meant for the host */ 1023 kvmppc_restart_interrupt(vcpu, exit_nr); 1024 1025 /* 1026 * get last instruction before being preempted 1027 * TODO: for e6500 check also BOOKE_INTERRUPT_LRAT_ERROR & ESR_DATA 1028 */ 1029 switch (exit_nr) { 1030 case BOOKE_INTERRUPT_DATA_STORAGE: 1031 case BOOKE_INTERRUPT_DTLB_MISS: 1032 case BOOKE_INTERRUPT_HV_PRIV: 1033 emulated = kvmppc_get_last_inst(vcpu, INST_GENERIC, &last_inst); 1034 break; 1035 case BOOKE_INTERRUPT_PROGRAM: 1036 /* SW breakpoints arrive as illegal instructions on HV */ 1037 if (vcpu->guest_debug & KVM_GUESTDBG_USE_SW_BP) 1038 emulated = kvmppc_get_last_inst(vcpu, INST_GENERIC, &last_inst); 1039 break; 1040 default: 1041 break; 1042 } 1043 1044 trace_kvm_exit(exit_nr, vcpu); 1045 1046 context_tracking_guest_exit(); 1047 if (!vtime_accounting_enabled_this_cpu()) { 1048 local_irq_enable(); 1049 /* 1050 * Service IRQs here before vtime_account_guest_exit() so any 1051 * ticks that occurred while running the guest are accounted to 1052 * the guest. If vtime accounting is enabled, accounting uses 1053 * TB rather than ticks, so it can be done without enabling 1054 * interrupts here, which has the problem that it accounts 1055 * interrupt processing overhead to the host. 1056 */ 1057 local_irq_disable(); 1058 } 1059 vtime_account_guest_exit(); 1060 1061 local_irq_enable(); 1062 1063 run->exit_reason = KVM_EXIT_UNKNOWN; 1064 run->ready_for_interrupt_injection = 1; 1065 1066 if (emulated != EMULATE_DONE) { 1067 r = kvmppc_resume_inst_load(vcpu, emulated, last_inst); 1068 goto out; 1069 } 1070 1071 switch (exit_nr) { 1072 case BOOKE_INTERRUPT_MACHINE_CHECK: 1073 printk("MACHINE CHECK: %lx\n", mfspr(SPRN_MCSR)); 1074 kvmppc_dump_vcpu(vcpu); 1075 /* For debugging, send invalid exit reason to user space */ 1076 run->hw.hardware_exit_reason = ~1ULL << 32; 1077 run->hw.hardware_exit_reason |= mfspr(SPRN_MCSR); 1078 r = RESUME_HOST; 1079 break; 1080 1081 case BOOKE_INTERRUPT_EXTERNAL: 1082 kvmppc_account_exit(vcpu, EXT_INTR_EXITS); 1083 r = RESUME_GUEST; 1084 break; 1085 1086 case BOOKE_INTERRUPT_DECREMENTER: 1087 kvmppc_account_exit(vcpu, DEC_EXITS); 1088 r = RESUME_GUEST; 1089 break; 1090 1091 case BOOKE_INTERRUPT_WATCHDOG: 1092 r = RESUME_GUEST; 1093 break; 1094 1095 case BOOKE_INTERRUPT_DOORBELL: 1096 kvmppc_account_exit(vcpu, DBELL_EXITS); 1097 r = RESUME_GUEST; 1098 break; 1099 1100 case BOOKE_INTERRUPT_GUEST_DBELL_CRIT: 1101 kvmppc_account_exit(vcpu, GDBELL_EXITS); 1102 1103 /* 1104 * We are here because there is a pending guest interrupt 1105 * which could not be delivered as MSR_CE or MSR_ME was not 1106 * set. Once we break from here we will retry delivery. 1107 */ 1108 r = RESUME_GUEST; 1109 break; 1110 1111 case BOOKE_INTERRUPT_GUEST_DBELL: 1112 kvmppc_account_exit(vcpu, GDBELL_EXITS); 1113 1114 /* 1115 * We are here because there is a pending guest interrupt 1116 * which could not be delivered as MSR_EE was not set. Once 1117 * we break from here we will retry delivery. 1118 */ 1119 r = RESUME_GUEST; 1120 break; 1121 1122 case BOOKE_INTERRUPT_PERFORMANCE_MONITOR: 1123 r = RESUME_GUEST; 1124 break; 1125 1126 case BOOKE_INTERRUPT_HV_PRIV: 1127 r = emulation_exit(vcpu); 1128 break; 1129 1130 case BOOKE_INTERRUPT_PROGRAM: 1131 if ((vcpu->guest_debug & KVM_GUESTDBG_USE_SW_BP) && 1132 (last_inst == KVMPPC_INST_SW_BREAKPOINT)) { 1133 /* 1134 * We are here because of an SW breakpoint instr, 1135 * so lets return to host to handle. 1136 */ 1137 r = kvmppc_handle_debug(vcpu); 1138 run->exit_reason = KVM_EXIT_DEBUG; 1139 kvmppc_account_exit(vcpu, DEBUG_EXITS); 1140 break; 1141 } 1142 1143 if (vcpu->arch.shared->msr & (MSR_PR | MSR_GS)) { 1144 /* 1145 * Program traps generated by user-level software must 1146 * be handled by the guest kernel. 1147 * 1148 * In GS mode, hypervisor privileged instructions trap 1149 * on BOOKE_INTERRUPT_HV_PRIV, not here, so these are 1150 * actual program interrupts, handled by the guest. 1151 */ 1152 kvmppc_core_queue_program(vcpu, vcpu->arch.fault_esr); 1153 r = RESUME_GUEST; 1154 kvmppc_account_exit(vcpu, USR_PR_INST); 1155 break; 1156 } 1157 1158 r = emulation_exit(vcpu); 1159 break; 1160 1161 case BOOKE_INTERRUPT_FP_UNAVAIL: 1162 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_FP_UNAVAIL); 1163 kvmppc_account_exit(vcpu, FP_UNAVAIL); 1164 r = RESUME_GUEST; 1165 break; 1166 1167 #ifdef CONFIG_SPE 1168 case BOOKE_INTERRUPT_SPE_UNAVAIL: { 1169 if (vcpu->arch.shared->msr & MSR_SPE) 1170 kvmppc_vcpu_enable_spe(vcpu); 1171 else 1172 kvmppc_booke_queue_irqprio(vcpu, 1173 BOOKE_IRQPRIO_SPE_UNAVAIL); 1174 r = RESUME_GUEST; 1175 break; 1176 } 1177 1178 case BOOKE_INTERRUPT_SPE_FP_DATA: 1179 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SPE_FP_DATA); 1180 r = RESUME_GUEST; 1181 break; 1182 1183 case BOOKE_INTERRUPT_SPE_FP_ROUND: 1184 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SPE_FP_ROUND); 1185 r = RESUME_GUEST; 1186 break; 1187 #elif defined(CONFIG_SPE_POSSIBLE) 1188 case BOOKE_INTERRUPT_SPE_UNAVAIL: 1189 /* 1190 * Guest wants SPE, but host kernel doesn't support it. Send 1191 * an "unimplemented operation" program check to the guest. 1192 */ 1193 kvmppc_core_queue_program(vcpu, ESR_PUO | ESR_SPV); 1194 r = RESUME_GUEST; 1195 break; 1196 1197 /* 1198 * These really should never happen without CONFIG_SPE, 1199 * as we should never enable the real MSR[SPE] in the guest. 1200 */ 1201 case BOOKE_INTERRUPT_SPE_FP_DATA: 1202 case BOOKE_INTERRUPT_SPE_FP_ROUND: 1203 printk(KERN_CRIT "%s: unexpected SPE interrupt %u at %08lx\n", 1204 __func__, exit_nr, vcpu->arch.regs.nip); 1205 run->hw.hardware_exit_reason = exit_nr; 1206 r = RESUME_HOST; 1207 break; 1208 #endif /* CONFIG_SPE_POSSIBLE */ 1209 1210 /* 1211 * On cores with Vector category, KVM is loaded only if CONFIG_ALTIVEC, 1212 * see kvmppc_core_check_processor_compat(). 1213 */ 1214 #ifdef CONFIG_ALTIVEC 1215 case BOOKE_INTERRUPT_ALTIVEC_UNAVAIL: 1216 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ALTIVEC_UNAVAIL); 1217 r = RESUME_GUEST; 1218 break; 1219 1220 case BOOKE_INTERRUPT_ALTIVEC_ASSIST: 1221 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ALTIVEC_ASSIST); 1222 r = RESUME_GUEST; 1223 break; 1224 #endif 1225 1226 case BOOKE_INTERRUPT_DATA_STORAGE: 1227 kvmppc_core_queue_data_storage(vcpu, vcpu->arch.fault_dear, 1228 vcpu->arch.fault_esr); 1229 kvmppc_account_exit(vcpu, DSI_EXITS); 1230 r = RESUME_GUEST; 1231 break; 1232 1233 case BOOKE_INTERRUPT_INST_STORAGE: 1234 kvmppc_core_queue_inst_storage(vcpu, vcpu->arch.fault_esr); 1235 kvmppc_account_exit(vcpu, ISI_EXITS); 1236 r = RESUME_GUEST; 1237 break; 1238 1239 case BOOKE_INTERRUPT_ALIGNMENT: 1240 kvmppc_core_queue_alignment(vcpu, vcpu->arch.fault_dear, 1241 vcpu->arch.fault_esr); 1242 r = RESUME_GUEST; 1243 break; 1244 1245 #ifdef CONFIG_KVM_BOOKE_HV 1246 case BOOKE_INTERRUPT_HV_SYSCALL: 1247 if (!(vcpu->arch.shared->msr & MSR_PR)) { 1248 kvmppc_set_gpr(vcpu, 3, kvmppc_kvm_pv(vcpu)); 1249 } else { 1250 /* 1251 * hcall from guest userspace -- send privileged 1252 * instruction program check. 1253 */ 1254 kvmppc_core_queue_program(vcpu, ESR_PPR); 1255 } 1256 1257 r = RESUME_GUEST; 1258 break; 1259 #else 1260 case BOOKE_INTERRUPT_SYSCALL: 1261 if (!(vcpu->arch.shared->msr & MSR_PR) && 1262 (((u32)kvmppc_get_gpr(vcpu, 0)) == KVM_SC_MAGIC_R0)) { 1263 /* KVM PV hypercalls */ 1264 kvmppc_set_gpr(vcpu, 3, kvmppc_kvm_pv(vcpu)); 1265 r = RESUME_GUEST; 1266 } else { 1267 /* Guest syscalls */ 1268 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SYSCALL); 1269 } 1270 kvmppc_account_exit(vcpu, SYSCALL_EXITS); 1271 r = RESUME_GUEST; 1272 break; 1273 #endif 1274 1275 case BOOKE_INTERRUPT_DTLB_MISS: { 1276 unsigned long eaddr = vcpu->arch.fault_dear; 1277 int gtlb_index; 1278 gpa_t gpaddr; 1279 gfn_t gfn; 1280 1281 #ifdef CONFIG_KVM_E500V2 1282 if (!(vcpu->arch.shared->msr & MSR_PR) && 1283 (eaddr & PAGE_MASK) == vcpu->arch.magic_page_ea) { 1284 kvmppc_map_magic(vcpu); 1285 kvmppc_account_exit(vcpu, DTLB_VIRT_MISS_EXITS); 1286 r = RESUME_GUEST; 1287 1288 break; 1289 } 1290 #endif 1291 1292 /* Check the guest TLB. */ 1293 gtlb_index = kvmppc_mmu_dtlb_index(vcpu, eaddr); 1294 if (gtlb_index < 0) { 1295 /* The guest didn't have a mapping for it. */ 1296 kvmppc_core_queue_dtlb_miss(vcpu, 1297 vcpu->arch.fault_dear, 1298 vcpu->arch.fault_esr); 1299 kvmppc_mmu_dtlb_miss(vcpu); 1300 kvmppc_account_exit(vcpu, DTLB_REAL_MISS_EXITS); 1301 r = RESUME_GUEST; 1302 break; 1303 } 1304 1305 idx = srcu_read_lock(&vcpu->kvm->srcu); 1306 1307 gpaddr = kvmppc_mmu_xlate(vcpu, gtlb_index, eaddr); 1308 gfn = gpaddr >> PAGE_SHIFT; 1309 1310 if (kvm_is_visible_gfn(vcpu->kvm, gfn)) { 1311 /* The guest TLB had a mapping, but the shadow TLB 1312 * didn't, and it is RAM. This could be because: 1313 * a) the entry is mapping the host kernel, or 1314 * b) the guest used a large mapping which we're faking 1315 * Either way, we need to satisfy the fault without 1316 * invoking the guest. */ 1317 kvmppc_mmu_map(vcpu, eaddr, gpaddr, gtlb_index); 1318 kvmppc_account_exit(vcpu, DTLB_VIRT_MISS_EXITS); 1319 r = RESUME_GUEST; 1320 } else { 1321 /* Guest has mapped and accessed a page which is not 1322 * actually RAM. */ 1323 vcpu->arch.paddr_accessed = gpaddr; 1324 vcpu->arch.vaddr_accessed = eaddr; 1325 r = kvmppc_emulate_mmio(vcpu); 1326 kvmppc_account_exit(vcpu, MMIO_EXITS); 1327 } 1328 1329 srcu_read_unlock(&vcpu->kvm->srcu, idx); 1330 break; 1331 } 1332 1333 case BOOKE_INTERRUPT_ITLB_MISS: { 1334 unsigned long eaddr = vcpu->arch.regs.nip; 1335 gpa_t gpaddr; 1336 gfn_t gfn; 1337 int gtlb_index; 1338 1339 r = RESUME_GUEST; 1340 1341 /* Check the guest TLB. */ 1342 gtlb_index = kvmppc_mmu_itlb_index(vcpu, eaddr); 1343 if (gtlb_index < 0) { 1344 /* The guest didn't have a mapping for it. */ 1345 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ITLB_MISS); 1346 kvmppc_mmu_itlb_miss(vcpu); 1347 kvmppc_account_exit(vcpu, ITLB_REAL_MISS_EXITS); 1348 break; 1349 } 1350 1351 kvmppc_account_exit(vcpu, ITLB_VIRT_MISS_EXITS); 1352 1353 idx = srcu_read_lock(&vcpu->kvm->srcu); 1354 1355 gpaddr = kvmppc_mmu_xlate(vcpu, gtlb_index, eaddr); 1356 gfn = gpaddr >> PAGE_SHIFT; 1357 1358 if (kvm_is_visible_gfn(vcpu->kvm, gfn)) { 1359 /* The guest TLB had a mapping, but the shadow TLB 1360 * didn't. This could be because: 1361 * a) the entry is mapping the host kernel, or 1362 * b) the guest used a large mapping which we're faking 1363 * Either way, we need to satisfy the fault without 1364 * invoking the guest. */ 1365 kvmppc_mmu_map(vcpu, eaddr, gpaddr, gtlb_index); 1366 } else { 1367 /* Guest mapped and leaped at non-RAM! */ 1368 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_MACHINE_CHECK); 1369 } 1370 1371 srcu_read_unlock(&vcpu->kvm->srcu, idx); 1372 break; 1373 } 1374 1375 case BOOKE_INTERRUPT_DEBUG: { 1376 r = kvmppc_handle_debug(vcpu); 1377 if (r == RESUME_HOST) 1378 run->exit_reason = KVM_EXIT_DEBUG; 1379 kvmppc_account_exit(vcpu, DEBUG_EXITS); 1380 break; 1381 } 1382 1383 default: 1384 printk(KERN_EMERG "exit_nr %d\n", exit_nr); 1385 BUG(); 1386 } 1387 1388 out: 1389 /* 1390 * To avoid clobbering exit_reason, only check for signals if we 1391 * aren't already exiting to userspace for some other reason. 1392 */ 1393 if (!(r & RESUME_HOST)) { 1394 s = kvmppc_prepare_to_enter(vcpu); 1395 if (s <= 0) 1396 r = (s << 2) | RESUME_HOST | (r & RESUME_FLAG_NV); 1397 else { 1398 /* interrupts now hard-disabled */ 1399 kvmppc_fix_ee_before_entry(); 1400 kvmppc_load_guest_fp(vcpu); 1401 kvmppc_load_guest_altivec(vcpu); 1402 } 1403 } 1404 1405 return r; 1406 } 1407 1408 static void kvmppc_set_tsr(struct kvm_vcpu *vcpu, u32 new_tsr) 1409 { 1410 u32 old_tsr = vcpu->arch.tsr; 1411 1412 vcpu->arch.tsr = new_tsr; 1413 1414 if ((old_tsr ^ vcpu->arch.tsr) & (TSR_ENW | TSR_WIS)) 1415 arm_next_watchdog(vcpu); 1416 1417 update_timer_ints(vcpu); 1418 } 1419 1420 int kvmppc_subarch_vcpu_init(struct kvm_vcpu *vcpu) 1421 { 1422 /* setup watchdog timer once */ 1423 spin_lock_init(&vcpu->arch.wdt_lock); 1424 timer_setup(&vcpu->arch.wdt_timer, kvmppc_watchdog_func, 0); 1425 1426 /* 1427 * Clear DBSR.MRR to avoid guest debug interrupt as 1428 * this is of host interest 1429 */ 1430 mtspr(SPRN_DBSR, DBSR_MRR); 1431 return 0; 1432 } 1433 1434 void kvmppc_subarch_vcpu_uninit(struct kvm_vcpu *vcpu) 1435 { 1436 del_timer_sync(&vcpu->arch.wdt_timer); 1437 } 1438 1439 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) 1440 { 1441 int i; 1442 1443 vcpu_load(vcpu); 1444 1445 regs->pc = vcpu->arch.regs.nip; 1446 regs->cr = kvmppc_get_cr(vcpu); 1447 regs->ctr = vcpu->arch.regs.ctr; 1448 regs->lr = vcpu->arch.regs.link; 1449 regs->xer = kvmppc_get_xer(vcpu); 1450 regs->msr = vcpu->arch.shared->msr; 1451 regs->srr0 = kvmppc_get_srr0(vcpu); 1452 regs->srr1 = kvmppc_get_srr1(vcpu); 1453 regs->pid = vcpu->arch.pid; 1454 regs->sprg0 = kvmppc_get_sprg0(vcpu); 1455 regs->sprg1 = kvmppc_get_sprg1(vcpu); 1456 regs->sprg2 = kvmppc_get_sprg2(vcpu); 1457 regs->sprg3 = kvmppc_get_sprg3(vcpu); 1458 regs->sprg4 = kvmppc_get_sprg4(vcpu); 1459 regs->sprg5 = kvmppc_get_sprg5(vcpu); 1460 regs->sprg6 = kvmppc_get_sprg6(vcpu); 1461 regs->sprg7 = kvmppc_get_sprg7(vcpu); 1462 1463 for (i = 0; i < ARRAY_SIZE(regs->gpr); i++) 1464 regs->gpr[i] = kvmppc_get_gpr(vcpu, i); 1465 1466 vcpu_put(vcpu); 1467 return 0; 1468 } 1469 1470 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) 1471 { 1472 int i; 1473 1474 vcpu_load(vcpu); 1475 1476 vcpu->arch.regs.nip = regs->pc; 1477 kvmppc_set_cr(vcpu, regs->cr); 1478 vcpu->arch.regs.ctr = regs->ctr; 1479 vcpu->arch.regs.link = regs->lr; 1480 kvmppc_set_xer(vcpu, regs->xer); 1481 kvmppc_set_msr(vcpu, regs->msr); 1482 kvmppc_set_srr0(vcpu, regs->srr0); 1483 kvmppc_set_srr1(vcpu, regs->srr1); 1484 kvmppc_set_pid(vcpu, regs->pid); 1485 kvmppc_set_sprg0(vcpu, regs->sprg0); 1486 kvmppc_set_sprg1(vcpu, regs->sprg1); 1487 kvmppc_set_sprg2(vcpu, regs->sprg2); 1488 kvmppc_set_sprg3(vcpu, regs->sprg3); 1489 kvmppc_set_sprg4(vcpu, regs->sprg4); 1490 kvmppc_set_sprg5(vcpu, regs->sprg5); 1491 kvmppc_set_sprg6(vcpu, regs->sprg6); 1492 kvmppc_set_sprg7(vcpu, regs->sprg7); 1493 1494 for (i = 0; i < ARRAY_SIZE(regs->gpr); i++) 1495 kvmppc_set_gpr(vcpu, i, regs->gpr[i]); 1496 1497 vcpu_put(vcpu); 1498 return 0; 1499 } 1500 1501 static void get_sregs_base(struct kvm_vcpu *vcpu, 1502 struct kvm_sregs *sregs) 1503 { 1504 u64 tb = get_tb(); 1505 1506 sregs->u.e.features |= KVM_SREGS_E_BASE; 1507 1508 sregs->u.e.csrr0 = vcpu->arch.csrr0; 1509 sregs->u.e.csrr1 = vcpu->arch.csrr1; 1510 sregs->u.e.mcsr = vcpu->arch.mcsr; 1511 sregs->u.e.esr = kvmppc_get_esr(vcpu); 1512 sregs->u.e.dear = kvmppc_get_dar(vcpu); 1513 sregs->u.e.tsr = vcpu->arch.tsr; 1514 sregs->u.e.tcr = vcpu->arch.tcr; 1515 sregs->u.e.dec = kvmppc_get_dec(vcpu, tb); 1516 sregs->u.e.tb = tb; 1517 sregs->u.e.vrsave = vcpu->arch.vrsave; 1518 } 1519 1520 static int set_sregs_base(struct kvm_vcpu *vcpu, 1521 struct kvm_sregs *sregs) 1522 { 1523 if (!(sregs->u.e.features & KVM_SREGS_E_BASE)) 1524 return 0; 1525 1526 vcpu->arch.csrr0 = sregs->u.e.csrr0; 1527 vcpu->arch.csrr1 = sregs->u.e.csrr1; 1528 vcpu->arch.mcsr = sregs->u.e.mcsr; 1529 kvmppc_set_esr(vcpu, sregs->u.e.esr); 1530 kvmppc_set_dar(vcpu, sregs->u.e.dear); 1531 vcpu->arch.vrsave = sregs->u.e.vrsave; 1532 kvmppc_set_tcr(vcpu, sregs->u.e.tcr); 1533 1534 if (sregs->u.e.update_special & KVM_SREGS_E_UPDATE_DEC) { 1535 vcpu->arch.dec = sregs->u.e.dec; 1536 kvmppc_emulate_dec(vcpu); 1537 } 1538 1539 if (sregs->u.e.update_special & KVM_SREGS_E_UPDATE_TSR) 1540 kvmppc_set_tsr(vcpu, sregs->u.e.tsr); 1541 1542 return 0; 1543 } 1544 1545 static void get_sregs_arch206(struct kvm_vcpu *vcpu, 1546 struct kvm_sregs *sregs) 1547 { 1548 sregs->u.e.features |= KVM_SREGS_E_ARCH206; 1549 1550 sregs->u.e.pir = vcpu->vcpu_id; 1551 sregs->u.e.mcsrr0 = vcpu->arch.mcsrr0; 1552 sregs->u.e.mcsrr1 = vcpu->arch.mcsrr1; 1553 sregs->u.e.decar = vcpu->arch.decar; 1554 sregs->u.e.ivpr = vcpu->arch.ivpr; 1555 } 1556 1557 static int set_sregs_arch206(struct kvm_vcpu *vcpu, 1558 struct kvm_sregs *sregs) 1559 { 1560 if (!(sregs->u.e.features & KVM_SREGS_E_ARCH206)) 1561 return 0; 1562 1563 if (sregs->u.e.pir != vcpu->vcpu_id) 1564 return -EINVAL; 1565 1566 vcpu->arch.mcsrr0 = sregs->u.e.mcsrr0; 1567 vcpu->arch.mcsrr1 = sregs->u.e.mcsrr1; 1568 vcpu->arch.decar = sregs->u.e.decar; 1569 vcpu->arch.ivpr = sregs->u.e.ivpr; 1570 1571 return 0; 1572 } 1573 1574 int kvmppc_get_sregs_ivor(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs) 1575 { 1576 sregs->u.e.features |= KVM_SREGS_E_IVOR; 1577 1578 sregs->u.e.ivor_low[0] = vcpu->arch.ivor[BOOKE_IRQPRIO_CRITICAL]; 1579 sregs->u.e.ivor_low[1] = vcpu->arch.ivor[BOOKE_IRQPRIO_MACHINE_CHECK]; 1580 sregs->u.e.ivor_low[2] = vcpu->arch.ivor[BOOKE_IRQPRIO_DATA_STORAGE]; 1581 sregs->u.e.ivor_low[3] = vcpu->arch.ivor[BOOKE_IRQPRIO_INST_STORAGE]; 1582 sregs->u.e.ivor_low[4] = vcpu->arch.ivor[BOOKE_IRQPRIO_EXTERNAL]; 1583 sregs->u.e.ivor_low[5] = vcpu->arch.ivor[BOOKE_IRQPRIO_ALIGNMENT]; 1584 sregs->u.e.ivor_low[6] = vcpu->arch.ivor[BOOKE_IRQPRIO_PROGRAM]; 1585 sregs->u.e.ivor_low[7] = vcpu->arch.ivor[BOOKE_IRQPRIO_FP_UNAVAIL]; 1586 sregs->u.e.ivor_low[8] = vcpu->arch.ivor[BOOKE_IRQPRIO_SYSCALL]; 1587 sregs->u.e.ivor_low[9] = vcpu->arch.ivor[BOOKE_IRQPRIO_AP_UNAVAIL]; 1588 sregs->u.e.ivor_low[10] = vcpu->arch.ivor[BOOKE_IRQPRIO_DECREMENTER]; 1589 sregs->u.e.ivor_low[11] = vcpu->arch.ivor[BOOKE_IRQPRIO_FIT]; 1590 sregs->u.e.ivor_low[12] = vcpu->arch.ivor[BOOKE_IRQPRIO_WATCHDOG]; 1591 sregs->u.e.ivor_low[13] = vcpu->arch.ivor[BOOKE_IRQPRIO_DTLB_MISS]; 1592 sregs->u.e.ivor_low[14] = vcpu->arch.ivor[BOOKE_IRQPRIO_ITLB_MISS]; 1593 sregs->u.e.ivor_low[15] = vcpu->arch.ivor[BOOKE_IRQPRIO_DEBUG]; 1594 return 0; 1595 } 1596 1597 int kvmppc_set_sregs_ivor(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs) 1598 { 1599 if (!(sregs->u.e.features & KVM_SREGS_E_IVOR)) 1600 return 0; 1601 1602 vcpu->arch.ivor[BOOKE_IRQPRIO_CRITICAL] = sregs->u.e.ivor_low[0]; 1603 vcpu->arch.ivor[BOOKE_IRQPRIO_MACHINE_CHECK] = sregs->u.e.ivor_low[1]; 1604 vcpu->arch.ivor[BOOKE_IRQPRIO_DATA_STORAGE] = sregs->u.e.ivor_low[2]; 1605 vcpu->arch.ivor[BOOKE_IRQPRIO_INST_STORAGE] = sregs->u.e.ivor_low[3]; 1606 vcpu->arch.ivor[BOOKE_IRQPRIO_EXTERNAL] = sregs->u.e.ivor_low[4]; 1607 vcpu->arch.ivor[BOOKE_IRQPRIO_ALIGNMENT] = sregs->u.e.ivor_low[5]; 1608 vcpu->arch.ivor[BOOKE_IRQPRIO_PROGRAM] = sregs->u.e.ivor_low[6]; 1609 vcpu->arch.ivor[BOOKE_IRQPRIO_FP_UNAVAIL] = sregs->u.e.ivor_low[7]; 1610 vcpu->arch.ivor[BOOKE_IRQPRIO_SYSCALL] = sregs->u.e.ivor_low[8]; 1611 vcpu->arch.ivor[BOOKE_IRQPRIO_AP_UNAVAIL] = sregs->u.e.ivor_low[9]; 1612 vcpu->arch.ivor[BOOKE_IRQPRIO_DECREMENTER] = sregs->u.e.ivor_low[10]; 1613 vcpu->arch.ivor[BOOKE_IRQPRIO_FIT] = sregs->u.e.ivor_low[11]; 1614 vcpu->arch.ivor[BOOKE_IRQPRIO_WATCHDOG] = sregs->u.e.ivor_low[12]; 1615 vcpu->arch.ivor[BOOKE_IRQPRIO_DTLB_MISS] = sregs->u.e.ivor_low[13]; 1616 vcpu->arch.ivor[BOOKE_IRQPRIO_ITLB_MISS] = sregs->u.e.ivor_low[14]; 1617 vcpu->arch.ivor[BOOKE_IRQPRIO_DEBUG] = sregs->u.e.ivor_low[15]; 1618 1619 return 0; 1620 } 1621 1622 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, 1623 struct kvm_sregs *sregs) 1624 { 1625 int ret; 1626 1627 vcpu_load(vcpu); 1628 1629 sregs->pvr = vcpu->arch.pvr; 1630 1631 get_sregs_base(vcpu, sregs); 1632 get_sregs_arch206(vcpu, sregs); 1633 ret = vcpu->kvm->arch.kvm_ops->get_sregs(vcpu, sregs); 1634 1635 vcpu_put(vcpu); 1636 return ret; 1637 } 1638 1639 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, 1640 struct kvm_sregs *sregs) 1641 { 1642 int ret = -EINVAL; 1643 1644 vcpu_load(vcpu); 1645 if (vcpu->arch.pvr != sregs->pvr) 1646 goto out; 1647 1648 ret = set_sregs_base(vcpu, sregs); 1649 if (ret < 0) 1650 goto out; 1651 1652 ret = set_sregs_arch206(vcpu, sregs); 1653 if (ret < 0) 1654 goto out; 1655 1656 ret = vcpu->kvm->arch.kvm_ops->set_sregs(vcpu, sregs); 1657 1658 out: 1659 vcpu_put(vcpu); 1660 return ret; 1661 } 1662 1663 int kvmppc_get_one_reg(struct kvm_vcpu *vcpu, u64 id, 1664 union kvmppc_one_reg *val) 1665 { 1666 int r = 0; 1667 1668 switch (id) { 1669 case KVM_REG_PPC_IAC1: 1670 *val = get_reg_val(id, vcpu->arch.dbg_reg.iac1); 1671 break; 1672 case KVM_REG_PPC_IAC2: 1673 *val = get_reg_val(id, vcpu->arch.dbg_reg.iac2); 1674 break; 1675 #if CONFIG_PPC_ADV_DEBUG_IACS > 2 1676 case KVM_REG_PPC_IAC3: 1677 *val = get_reg_val(id, vcpu->arch.dbg_reg.iac3); 1678 break; 1679 case KVM_REG_PPC_IAC4: 1680 *val = get_reg_val(id, vcpu->arch.dbg_reg.iac4); 1681 break; 1682 #endif 1683 case KVM_REG_PPC_DAC1: 1684 *val = get_reg_val(id, vcpu->arch.dbg_reg.dac1); 1685 break; 1686 case KVM_REG_PPC_DAC2: 1687 *val = get_reg_val(id, vcpu->arch.dbg_reg.dac2); 1688 break; 1689 case KVM_REG_PPC_EPR: { 1690 u32 epr = kvmppc_get_epr(vcpu); 1691 *val = get_reg_val(id, epr); 1692 break; 1693 } 1694 #if defined(CONFIG_64BIT) 1695 case KVM_REG_PPC_EPCR: 1696 *val = get_reg_val(id, vcpu->arch.epcr); 1697 break; 1698 #endif 1699 case KVM_REG_PPC_TCR: 1700 *val = get_reg_val(id, vcpu->arch.tcr); 1701 break; 1702 case KVM_REG_PPC_TSR: 1703 *val = get_reg_val(id, vcpu->arch.tsr); 1704 break; 1705 case KVM_REG_PPC_DEBUG_INST: 1706 *val = get_reg_val(id, KVMPPC_INST_SW_BREAKPOINT); 1707 break; 1708 case KVM_REG_PPC_VRSAVE: 1709 *val = get_reg_val(id, vcpu->arch.vrsave); 1710 break; 1711 default: 1712 r = vcpu->kvm->arch.kvm_ops->get_one_reg(vcpu, id, val); 1713 break; 1714 } 1715 1716 return r; 1717 } 1718 1719 int kvmppc_set_one_reg(struct kvm_vcpu *vcpu, u64 id, 1720 union kvmppc_one_reg *val) 1721 { 1722 int r = 0; 1723 1724 switch (id) { 1725 case KVM_REG_PPC_IAC1: 1726 vcpu->arch.dbg_reg.iac1 = set_reg_val(id, *val); 1727 break; 1728 case KVM_REG_PPC_IAC2: 1729 vcpu->arch.dbg_reg.iac2 = set_reg_val(id, *val); 1730 break; 1731 #if CONFIG_PPC_ADV_DEBUG_IACS > 2 1732 case KVM_REG_PPC_IAC3: 1733 vcpu->arch.dbg_reg.iac3 = set_reg_val(id, *val); 1734 break; 1735 case KVM_REG_PPC_IAC4: 1736 vcpu->arch.dbg_reg.iac4 = set_reg_val(id, *val); 1737 break; 1738 #endif 1739 case KVM_REG_PPC_DAC1: 1740 vcpu->arch.dbg_reg.dac1 = set_reg_val(id, *val); 1741 break; 1742 case KVM_REG_PPC_DAC2: 1743 vcpu->arch.dbg_reg.dac2 = set_reg_val(id, *val); 1744 break; 1745 case KVM_REG_PPC_EPR: { 1746 u32 new_epr = set_reg_val(id, *val); 1747 kvmppc_set_epr(vcpu, new_epr); 1748 break; 1749 } 1750 #if defined(CONFIG_64BIT) 1751 case KVM_REG_PPC_EPCR: { 1752 u32 new_epcr = set_reg_val(id, *val); 1753 kvmppc_set_epcr(vcpu, new_epcr); 1754 break; 1755 } 1756 #endif 1757 case KVM_REG_PPC_OR_TSR: { 1758 u32 tsr_bits = set_reg_val(id, *val); 1759 kvmppc_set_tsr_bits(vcpu, tsr_bits); 1760 break; 1761 } 1762 case KVM_REG_PPC_CLEAR_TSR: { 1763 u32 tsr_bits = set_reg_val(id, *val); 1764 kvmppc_clr_tsr_bits(vcpu, tsr_bits); 1765 break; 1766 } 1767 case KVM_REG_PPC_TSR: { 1768 u32 tsr = set_reg_val(id, *val); 1769 kvmppc_set_tsr(vcpu, tsr); 1770 break; 1771 } 1772 case KVM_REG_PPC_TCR: { 1773 u32 tcr = set_reg_val(id, *val); 1774 kvmppc_set_tcr(vcpu, tcr); 1775 break; 1776 } 1777 case KVM_REG_PPC_VRSAVE: 1778 vcpu->arch.vrsave = set_reg_val(id, *val); 1779 break; 1780 default: 1781 r = vcpu->kvm->arch.kvm_ops->set_one_reg(vcpu, id, val); 1782 break; 1783 } 1784 1785 return r; 1786 } 1787 1788 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) 1789 { 1790 return -EOPNOTSUPP; 1791 } 1792 1793 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) 1794 { 1795 return -EOPNOTSUPP; 1796 } 1797 1798 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, 1799 struct kvm_translation *tr) 1800 { 1801 int r; 1802 1803 vcpu_load(vcpu); 1804 r = kvmppc_core_vcpu_translate(vcpu, tr); 1805 vcpu_put(vcpu); 1806 return r; 1807 } 1808 1809 void kvm_arch_sync_dirty_log(struct kvm *kvm, struct kvm_memory_slot *memslot) 1810 { 1811 1812 } 1813 1814 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log) 1815 { 1816 return -EOPNOTSUPP; 1817 } 1818 1819 void kvmppc_core_free_memslot(struct kvm *kvm, struct kvm_memory_slot *slot) 1820 { 1821 } 1822 1823 int kvmppc_core_prepare_memory_region(struct kvm *kvm, 1824 struct kvm_memory_slot *memslot, 1825 const struct kvm_userspace_memory_region *mem, 1826 enum kvm_mr_change change) 1827 { 1828 return 0; 1829 } 1830 1831 void kvmppc_core_commit_memory_region(struct kvm *kvm, 1832 const struct kvm_userspace_memory_region *mem, 1833 const struct kvm_memory_slot *old, 1834 const struct kvm_memory_slot *new, 1835 enum kvm_mr_change change) 1836 { 1837 } 1838 1839 void kvmppc_core_flush_memslot(struct kvm *kvm, struct kvm_memory_slot *memslot) 1840 { 1841 } 1842 1843 void kvmppc_set_epcr(struct kvm_vcpu *vcpu, u32 new_epcr) 1844 { 1845 #if defined(CONFIG_64BIT) 1846 vcpu->arch.epcr = new_epcr; 1847 #ifdef CONFIG_KVM_BOOKE_HV 1848 vcpu->arch.shadow_epcr &= ~SPRN_EPCR_GICM; 1849 if (vcpu->arch.epcr & SPRN_EPCR_ICM) 1850 vcpu->arch.shadow_epcr |= SPRN_EPCR_GICM; 1851 #endif 1852 #endif 1853 } 1854 1855 void kvmppc_set_tcr(struct kvm_vcpu *vcpu, u32 new_tcr) 1856 { 1857 vcpu->arch.tcr = new_tcr; 1858 arm_next_watchdog(vcpu); 1859 update_timer_ints(vcpu); 1860 } 1861 1862 void kvmppc_set_tsr_bits(struct kvm_vcpu *vcpu, u32 tsr_bits) 1863 { 1864 set_bits(tsr_bits, &vcpu->arch.tsr); 1865 smp_wmb(); 1866 kvm_make_request(KVM_REQ_PENDING_TIMER, vcpu); 1867 kvm_vcpu_kick(vcpu); 1868 } 1869 1870 void kvmppc_clr_tsr_bits(struct kvm_vcpu *vcpu, u32 tsr_bits) 1871 { 1872 clear_bits(tsr_bits, &vcpu->arch.tsr); 1873 1874 /* 1875 * We may have stopped the watchdog due to 1876 * being stuck on final expiration. 1877 */ 1878 if (tsr_bits & (TSR_ENW | TSR_WIS)) 1879 arm_next_watchdog(vcpu); 1880 1881 update_timer_ints(vcpu); 1882 } 1883 1884 void kvmppc_decrementer_func(struct kvm_vcpu *vcpu) 1885 { 1886 if (vcpu->arch.tcr & TCR_ARE) { 1887 vcpu->arch.dec = vcpu->arch.decar; 1888 kvmppc_emulate_dec(vcpu); 1889 } 1890 1891 kvmppc_set_tsr_bits(vcpu, TSR_DIS); 1892 } 1893 1894 static int kvmppc_booke_add_breakpoint(struct debug_reg *dbg_reg, 1895 uint64_t addr, int index) 1896 { 1897 switch (index) { 1898 case 0: 1899 dbg_reg->dbcr0 |= DBCR0_IAC1; 1900 dbg_reg->iac1 = addr; 1901 break; 1902 case 1: 1903 dbg_reg->dbcr0 |= DBCR0_IAC2; 1904 dbg_reg->iac2 = addr; 1905 break; 1906 #if CONFIG_PPC_ADV_DEBUG_IACS > 2 1907 case 2: 1908 dbg_reg->dbcr0 |= DBCR0_IAC3; 1909 dbg_reg->iac3 = addr; 1910 break; 1911 case 3: 1912 dbg_reg->dbcr0 |= DBCR0_IAC4; 1913 dbg_reg->iac4 = addr; 1914 break; 1915 #endif 1916 default: 1917 return -EINVAL; 1918 } 1919 1920 dbg_reg->dbcr0 |= DBCR0_IDM; 1921 return 0; 1922 } 1923 1924 static int kvmppc_booke_add_watchpoint(struct debug_reg *dbg_reg, uint64_t addr, 1925 int type, int index) 1926 { 1927 switch (index) { 1928 case 0: 1929 if (type & KVMPPC_DEBUG_WATCH_READ) 1930 dbg_reg->dbcr0 |= DBCR0_DAC1R; 1931 if (type & KVMPPC_DEBUG_WATCH_WRITE) 1932 dbg_reg->dbcr0 |= DBCR0_DAC1W; 1933 dbg_reg->dac1 = addr; 1934 break; 1935 case 1: 1936 if (type & KVMPPC_DEBUG_WATCH_READ) 1937 dbg_reg->dbcr0 |= DBCR0_DAC2R; 1938 if (type & KVMPPC_DEBUG_WATCH_WRITE) 1939 dbg_reg->dbcr0 |= DBCR0_DAC2W; 1940 dbg_reg->dac2 = addr; 1941 break; 1942 default: 1943 return -EINVAL; 1944 } 1945 1946 dbg_reg->dbcr0 |= DBCR0_IDM; 1947 return 0; 1948 } 1949 void kvm_guest_protect_msr(struct kvm_vcpu *vcpu, ulong prot_bitmap, bool set) 1950 { 1951 /* XXX: Add similar MSR protection for BookE-PR */ 1952 #ifdef CONFIG_KVM_BOOKE_HV 1953 BUG_ON(prot_bitmap & ~(MSRP_UCLEP | MSRP_DEP | MSRP_PMMP)); 1954 if (set) { 1955 if (prot_bitmap & MSR_UCLE) 1956 vcpu->arch.shadow_msrp |= MSRP_UCLEP; 1957 if (prot_bitmap & MSR_DE) 1958 vcpu->arch.shadow_msrp |= MSRP_DEP; 1959 if (prot_bitmap & MSR_PMM) 1960 vcpu->arch.shadow_msrp |= MSRP_PMMP; 1961 } else { 1962 if (prot_bitmap & MSR_UCLE) 1963 vcpu->arch.shadow_msrp &= ~MSRP_UCLEP; 1964 if (prot_bitmap & MSR_DE) 1965 vcpu->arch.shadow_msrp &= ~MSRP_DEP; 1966 if (prot_bitmap & MSR_PMM) 1967 vcpu->arch.shadow_msrp &= ~MSRP_PMMP; 1968 } 1969 #endif 1970 } 1971 1972 int kvmppc_xlate(struct kvm_vcpu *vcpu, ulong eaddr, enum xlate_instdata xlid, 1973 enum xlate_readwrite xlrw, struct kvmppc_pte *pte) 1974 { 1975 int gtlb_index; 1976 gpa_t gpaddr; 1977 1978 #ifdef CONFIG_KVM_E500V2 1979 if (!(vcpu->arch.shared->msr & MSR_PR) && 1980 (eaddr & PAGE_MASK) == vcpu->arch.magic_page_ea) { 1981 pte->eaddr = eaddr; 1982 pte->raddr = (vcpu->arch.magic_page_pa & PAGE_MASK) | 1983 (eaddr & ~PAGE_MASK); 1984 pte->vpage = eaddr >> PAGE_SHIFT; 1985 pte->may_read = true; 1986 pte->may_write = true; 1987 pte->may_execute = true; 1988 1989 return 0; 1990 } 1991 #endif 1992 1993 /* Check the guest TLB. */ 1994 switch (xlid) { 1995 case XLATE_INST: 1996 gtlb_index = kvmppc_mmu_itlb_index(vcpu, eaddr); 1997 break; 1998 case XLATE_DATA: 1999 gtlb_index = kvmppc_mmu_dtlb_index(vcpu, eaddr); 2000 break; 2001 default: 2002 BUG(); 2003 } 2004 2005 /* Do we have a TLB entry at all? */ 2006 if (gtlb_index < 0) 2007 return -ENOENT; 2008 2009 gpaddr = kvmppc_mmu_xlate(vcpu, gtlb_index, eaddr); 2010 2011 pte->eaddr = eaddr; 2012 pte->raddr = (gpaddr & PAGE_MASK) | (eaddr & ~PAGE_MASK); 2013 pte->vpage = eaddr >> PAGE_SHIFT; 2014 2015 /* XXX read permissions from the guest TLB */ 2016 pte->may_read = true; 2017 pte->may_write = true; 2018 pte->may_execute = true; 2019 2020 return 0; 2021 } 2022 2023 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, 2024 struct kvm_guest_debug *dbg) 2025 { 2026 struct debug_reg *dbg_reg; 2027 int n, b = 0, w = 0; 2028 int ret = 0; 2029 2030 vcpu_load(vcpu); 2031 2032 if (!(dbg->control & KVM_GUESTDBG_ENABLE)) { 2033 vcpu->arch.dbg_reg.dbcr0 = 0; 2034 vcpu->guest_debug = 0; 2035 kvm_guest_protect_msr(vcpu, MSR_DE, false); 2036 goto out; 2037 } 2038 2039 kvm_guest_protect_msr(vcpu, MSR_DE, true); 2040 vcpu->guest_debug = dbg->control; 2041 vcpu->arch.dbg_reg.dbcr0 = 0; 2042 2043 if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) 2044 vcpu->arch.dbg_reg.dbcr0 |= DBCR0_IDM | DBCR0_IC; 2045 2046 /* Code below handles only HW breakpoints */ 2047 dbg_reg = &(vcpu->arch.dbg_reg); 2048 2049 #ifdef CONFIG_KVM_BOOKE_HV 2050 /* 2051 * On BookE-HV (e500mc) the guest is always executed with MSR.GS=1 2052 * DBCR1 and DBCR2 are set to trigger debug events when MSR.PR is 0 2053 */ 2054 dbg_reg->dbcr1 = 0; 2055 dbg_reg->dbcr2 = 0; 2056 #else 2057 /* 2058 * On BookE-PR (e500v2) the guest is always executed with MSR.PR=1 2059 * We set DBCR1 and DBCR2 to only trigger debug events when MSR.PR 2060 * is set. 2061 */ 2062 dbg_reg->dbcr1 = DBCR1_IAC1US | DBCR1_IAC2US | DBCR1_IAC3US | 2063 DBCR1_IAC4US; 2064 dbg_reg->dbcr2 = DBCR2_DAC1US | DBCR2_DAC2US; 2065 #endif 2066 2067 if (!(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)) 2068 goto out; 2069 2070 ret = -EINVAL; 2071 for (n = 0; n < (KVMPPC_BOOKE_IAC_NUM + KVMPPC_BOOKE_DAC_NUM); n++) { 2072 uint64_t addr = dbg->arch.bp[n].addr; 2073 uint32_t type = dbg->arch.bp[n].type; 2074 2075 if (type == KVMPPC_DEBUG_NONE) 2076 continue; 2077 2078 if (type & ~(KVMPPC_DEBUG_WATCH_READ | 2079 KVMPPC_DEBUG_WATCH_WRITE | 2080 KVMPPC_DEBUG_BREAKPOINT)) 2081 goto out; 2082 2083 if (type & KVMPPC_DEBUG_BREAKPOINT) { 2084 /* Setting H/W breakpoint */ 2085 if (kvmppc_booke_add_breakpoint(dbg_reg, addr, b++)) 2086 goto out; 2087 } else { 2088 /* Setting H/W watchpoint */ 2089 if (kvmppc_booke_add_watchpoint(dbg_reg, addr, 2090 type, w++)) 2091 goto out; 2092 } 2093 } 2094 2095 ret = 0; 2096 out: 2097 vcpu_put(vcpu); 2098 return ret; 2099 } 2100 2101 void kvmppc_booke_vcpu_load(struct kvm_vcpu *vcpu, int cpu) 2102 { 2103 vcpu->cpu = smp_processor_id(); 2104 current->thread.kvm_vcpu = vcpu; 2105 } 2106 2107 void kvmppc_booke_vcpu_put(struct kvm_vcpu *vcpu) 2108 { 2109 current->thread.kvm_vcpu = NULL; 2110 vcpu->cpu = -1; 2111 2112 /* Clear pending debug event in DBSR */ 2113 kvmppc_clear_dbsr(); 2114 } 2115 2116 int kvmppc_core_init_vm(struct kvm *kvm) 2117 { 2118 return kvm->arch.kvm_ops->init_vm(kvm); 2119 } 2120 2121 int kvmppc_core_vcpu_create(struct kvm_vcpu *vcpu) 2122 { 2123 int i; 2124 int r; 2125 2126 r = vcpu->kvm->arch.kvm_ops->vcpu_create(vcpu); 2127 if (r) 2128 return r; 2129 2130 /* Initial guest state: 16MB mapping 0 -> 0, PC = 0, MSR = 0, R1 = 16MB */ 2131 vcpu->arch.regs.nip = 0; 2132 vcpu->arch.shared->pir = vcpu->vcpu_id; 2133 kvmppc_set_gpr(vcpu, 1, (16<<20) - 8); /* -8 for the callee-save LR slot */ 2134 kvmppc_set_msr(vcpu, 0); 2135 2136 #ifndef CONFIG_KVM_BOOKE_HV 2137 vcpu->arch.shadow_msr = MSR_USER | MSR_IS | MSR_DS; 2138 vcpu->arch.shadow_pid = 1; 2139 vcpu->arch.shared->msr = 0; 2140 #endif 2141 2142 /* Eye-catching numbers so we know if the guest takes an interrupt 2143 * before it's programmed its own IVPR/IVORs. */ 2144 vcpu->arch.ivpr = 0x55550000; 2145 for (i = 0; i < BOOKE_IRQPRIO_MAX; i++) 2146 vcpu->arch.ivor[i] = 0x7700 | i * 4; 2147 2148 kvmppc_init_timing_stats(vcpu); 2149 2150 r = kvmppc_core_vcpu_setup(vcpu); 2151 if (r) 2152 vcpu->kvm->arch.kvm_ops->vcpu_free(vcpu); 2153 kvmppc_sanity_check(vcpu); 2154 return r; 2155 } 2156 2157 void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu) 2158 { 2159 vcpu->kvm->arch.kvm_ops->vcpu_free(vcpu); 2160 } 2161 2162 void kvmppc_core_destroy_vm(struct kvm *kvm) 2163 { 2164 kvm->arch.kvm_ops->destroy_vm(kvm); 2165 } 2166 2167 void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu) 2168 { 2169 vcpu->kvm->arch.kvm_ops->vcpu_load(vcpu, cpu); 2170 } 2171 2172 void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu) 2173 { 2174 vcpu->kvm->arch.kvm_ops->vcpu_put(vcpu); 2175 } 2176 2177 int __init kvmppc_booke_init(void) 2178 { 2179 #ifndef CONFIG_KVM_BOOKE_HV 2180 unsigned long ivor[16]; 2181 unsigned long *handler = kvmppc_booke_handler_addr; 2182 unsigned long max_ivor = 0; 2183 unsigned long handler_len; 2184 int i; 2185 2186 /* We install our own exception handlers by hijacking IVPR. IVPR must 2187 * be 16-bit aligned, so we need a 64KB allocation. */ 2188 kvmppc_booke_handlers = __get_free_pages(GFP_KERNEL | __GFP_ZERO, 2189 VCPU_SIZE_ORDER); 2190 if (!kvmppc_booke_handlers) 2191 return -ENOMEM; 2192 2193 /* XXX make sure our handlers are smaller than Linux's */ 2194 2195 /* Copy our interrupt handlers to match host IVORs. That way we don't 2196 * have to swap the IVORs on every guest/host transition. */ 2197 ivor[0] = mfspr(SPRN_IVOR0); 2198 ivor[1] = mfspr(SPRN_IVOR1); 2199 ivor[2] = mfspr(SPRN_IVOR2); 2200 ivor[3] = mfspr(SPRN_IVOR3); 2201 ivor[4] = mfspr(SPRN_IVOR4); 2202 ivor[5] = mfspr(SPRN_IVOR5); 2203 ivor[6] = mfspr(SPRN_IVOR6); 2204 ivor[7] = mfspr(SPRN_IVOR7); 2205 ivor[8] = mfspr(SPRN_IVOR8); 2206 ivor[9] = mfspr(SPRN_IVOR9); 2207 ivor[10] = mfspr(SPRN_IVOR10); 2208 ivor[11] = mfspr(SPRN_IVOR11); 2209 ivor[12] = mfspr(SPRN_IVOR12); 2210 ivor[13] = mfspr(SPRN_IVOR13); 2211 ivor[14] = mfspr(SPRN_IVOR14); 2212 ivor[15] = mfspr(SPRN_IVOR15); 2213 2214 for (i = 0; i < 16; i++) { 2215 if (ivor[i] > max_ivor) 2216 max_ivor = i; 2217 2218 handler_len = handler[i + 1] - handler[i]; 2219 memcpy((void *)kvmppc_booke_handlers + ivor[i], 2220 (void *)handler[i], handler_len); 2221 } 2222 2223 handler_len = handler[max_ivor + 1] - handler[max_ivor]; 2224 flush_icache_range(kvmppc_booke_handlers, kvmppc_booke_handlers + 2225 ivor[max_ivor] + handler_len); 2226 #endif /* !BOOKE_HV */ 2227 return 0; 2228 } 2229 2230 void __exit kvmppc_booke_exit(void) 2231 { 2232 free_pages(kvmppc_booke_handlers, VCPU_SIZE_ORDER); 2233 kvm_exit(); 2234 } 2235