1 /* 2 * This program is free software; you can redistribute it and/or modify 3 * it under the terms of the GNU General Public License, version 2, as 4 * published by the Free Software Foundation. 5 * 6 * This program is distributed in the hope that it will be useful, 7 * but WITHOUT ANY WARRANTY; without even the implied warranty of 8 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 9 * GNU General Public License for more details. 10 * 11 * You should have received a copy of the GNU General Public License 12 * along with this program; if not, write to the Free Software 13 * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. 14 * 15 * Copyright IBM Corp. 2007 16 * Copyright 2010-2011 Freescale Semiconductor, Inc. 17 * 18 * Authors: Hollis Blanchard <hollisb@us.ibm.com> 19 * Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com> 20 * Scott Wood <scottwood@freescale.com> 21 * Varun Sethi <varun.sethi@freescale.com> 22 */ 23 24 #include <linux/errno.h> 25 #include <linux/err.h> 26 #include <linux/kvm_host.h> 27 #include <linux/gfp.h> 28 #include <linux/module.h> 29 #include <linux/vmalloc.h> 30 #include <linux/fs.h> 31 32 #include <asm/cputable.h> 33 #include <asm/uaccess.h> 34 #include <asm/kvm_ppc.h> 35 #include <asm/cacheflush.h> 36 #include <asm/dbell.h> 37 #include <asm/hw_irq.h> 38 #include <asm/irq.h> 39 40 #include "timing.h" 41 #include "booke.h" 42 43 unsigned long kvmppc_booke_handlers; 44 45 #define VM_STAT(x) offsetof(struct kvm, stat.x), KVM_STAT_VM 46 #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU 47 48 struct kvm_stats_debugfs_item debugfs_entries[] = { 49 { "mmio", VCPU_STAT(mmio_exits) }, 50 { "dcr", VCPU_STAT(dcr_exits) }, 51 { "sig", VCPU_STAT(signal_exits) }, 52 { "itlb_r", VCPU_STAT(itlb_real_miss_exits) }, 53 { "itlb_v", VCPU_STAT(itlb_virt_miss_exits) }, 54 { "dtlb_r", VCPU_STAT(dtlb_real_miss_exits) }, 55 { "dtlb_v", VCPU_STAT(dtlb_virt_miss_exits) }, 56 { "sysc", VCPU_STAT(syscall_exits) }, 57 { "isi", VCPU_STAT(isi_exits) }, 58 { "dsi", VCPU_STAT(dsi_exits) }, 59 { "inst_emu", VCPU_STAT(emulated_inst_exits) }, 60 { "dec", VCPU_STAT(dec_exits) }, 61 { "ext_intr", VCPU_STAT(ext_intr_exits) }, 62 { "halt_wakeup", VCPU_STAT(halt_wakeup) }, 63 { "doorbell", VCPU_STAT(dbell_exits) }, 64 { "guest doorbell", VCPU_STAT(gdbell_exits) }, 65 { NULL } 66 }; 67 68 /* TODO: use vcpu_printf() */ 69 void kvmppc_dump_vcpu(struct kvm_vcpu *vcpu) 70 { 71 int i; 72 73 printk("pc: %08lx msr: %08llx\n", vcpu->arch.pc, vcpu->arch.shared->msr); 74 printk("lr: %08lx ctr: %08lx\n", vcpu->arch.lr, vcpu->arch.ctr); 75 printk("srr0: %08llx srr1: %08llx\n", vcpu->arch.shared->srr0, 76 vcpu->arch.shared->srr1); 77 78 printk("exceptions: %08lx\n", vcpu->arch.pending_exceptions); 79 80 for (i = 0; i < 32; i += 4) { 81 printk("gpr%02d: %08lx %08lx %08lx %08lx\n", i, 82 kvmppc_get_gpr(vcpu, i), 83 kvmppc_get_gpr(vcpu, i+1), 84 kvmppc_get_gpr(vcpu, i+2), 85 kvmppc_get_gpr(vcpu, i+3)); 86 } 87 } 88 89 #ifdef CONFIG_SPE 90 void kvmppc_vcpu_disable_spe(struct kvm_vcpu *vcpu) 91 { 92 preempt_disable(); 93 enable_kernel_spe(); 94 kvmppc_save_guest_spe(vcpu); 95 vcpu->arch.shadow_msr &= ~MSR_SPE; 96 preempt_enable(); 97 } 98 99 static void kvmppc_vcpu_enable_spe(struct kvm_vcpu *vcpu) 100 { 101 preempt_disable(); 102 enable_kernel_spe(); 103 kvmppc_load_guest_spe(vcpu); 104 vcpu->arch.shadow_msr |= MSR_SPE; 105 preempt_enable(); 106 } 107 108 static void kvmppc_vcpu_sync_spe(struct kvm_vcpu *vcpu) 109 { 110 if (vcpu->arch.shared->msr & MSR_SPE) { 111 if (!(vcpu->arch.shadow_msr & MSR_SPE)) 112 kvmppc_vcpu_enable_spe(vcpu); 113 } else if (vcpu->arch.shadow_msr & MSR_SPE) { 114 kvmppc_vcpu_disable_spe(vcpu); 115 } 116 } 117 #else 118 static void kvmppc_vcpu_sync_spe(struct kvm_vcpu *vcpu) 119 { 120 } 121 #endif 122 123 /* 124 * Helper function for "full" MSR writes. No need to call this if only 125 * EE/CE/ME/DE/RI are changing. 126 */ 127 void kvmppc_set_msr(struct kvm_vcpu *vcpu, u32 new_msr) 128 { 129 u32 old_msr = vcpu->arch.shared->msr; 130 131 #ifdef CONFIG_KVM_BOOKE_HV 132 new_msr |= MSR_GS; 133 #endif 134 135 vcpu->arch.shared->msr = new_msr; 136 137 kvmppc_mmu_msr_notify(vcpu, old_msr); 138 kvmppc_vcpu_sync_spe(vcpu); 139 } 140 141 static void kvmppc_booke_queue_irqprio(struct kvm_vcpu *vcpu, 142 unsigned int priority) 143 { 144 set_bit(priority, &vcpu->arch.pending_exceptions); 145 } 146 147 static void kvmppc_core_queue_dtlb_miss(struct kvm_vcpu *vcpu, 148 ulong dear_flags, ulong esr_flags) 149 { 150 vcpu->arch.queued_dear = dear_flags; 151 vcpu->arch.queued_esr = esr_flags; 152 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DTLB_MISS); 153 } 154 155 static void kvmppc_core_queue_data_storage(struct kvm_vcpu *vcpu, 156 ulong dear_flags, ulong esr_flags) 157 { 158 vcpu->arch.queued_dear = dear_flags; 159 vcpu->arch.queued_esr = esr_flags; 160 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DATA_STORAGE); 161 } 162 163 static void kvmppc_core_queue_inst_storage(struct kvm_vcpu *vcpu, 164 ulong esr_flags) 165 { 166 vcpu->arch.queued_esr = esr_flags; 167 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_INST_STORAGE); 168 } 169 170 void kvmppc_core_queue_program(struct kvm_vcpu *vcpu, ulong esr_flags) 171 { 172 vcpu->arch.queued_esr = esr_flags; 173 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_PROGRAM); 174 } 175 176 void kvmppc_core_queue_dec(struct kvm_vcpu *vcpu) 177 { 178 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DECREMENTER); 179 } 180 181 int kvmppc_core_pending_dec(struct kvm_vcpu *vcpu) 182 { 183 return test_bit(BOOKE_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions); 184 } 185 186 void kvmppc_core_dequeue_dec(struct kvm_vcpu *vcpu) 187 { 188 clear_bit(BOOKE_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions); 189 } 190 191 void kvmppc_core_queue_external(struct kvm_vcpu *vcpu, 192 struct kvm_interrupt *irq) 193 { 194 unsigned int prio = BOOKE_IRQPRIO_EXTERNAL; 195 196 if (irq->irq == KVM_INTERRUPT_SET_LEVEL) 197 prio = BOOKE_IRQPRIO_EXTERNAL_LEVEL; 198 199 kvmppc_booke_queue_irqprio(vcpu, prio); 200 } 201 202 void kvmppc_core_dequeue_external(struct kvm_vcpu *vcpu, 203 struct kvm_interrupt *irq) 204 { 205 clear_bit(BOOKE_IRQPRIO_EXTERNAL, &vcpu->arch.pending_exceptions); 206 clear_bit(BOOKE_IRQPRIO_EXTERNAL_LEVEL, &vcpu->arch.pending_exceptions); 207 } 208 209 static void set_guest_srr(struct kvm_vcpu *vcpu, unsigned long srr0, u32 srr1) 210 { 211 #ifdef CONFIG_KVM_BOOKE_HV 212 mtspr(SPRN_GSRR0, srr0); 213 mtspr(SPRN_GSRR1, srr1); 214 #else 215 vcpu->arch.shared->srr0 = srr0; 216 vcpu->arch.shared->srr1 = srr1; 217 #endif 218 } 219 220 static void set_guest_csrr(struct kvm_vcpu *vcpu, unsigned long srr0, u32 srr1) 221 { 222 vcpu->arch.csrr0 = srr0; 223 vcpu->arch.csrr1 = srr1; 224 } 225 226 static void set_guest_dsrr(struct kvm_vcpu *vcpu, unsigned long srr0, u32 srr1) 227 { 228 if (cpu_has_feature(CPU_FTR_DEBUG_LVL_EXC)) { 229 vcpu->arch.dsrr0 = srr0; 230 vcpu->arch.dsrr1 = srr1; 231 } else { 232 set_guest_csrr(vcpu, srr0, srr1); 233 } 234 } 235 236 static void set_guest_mcsrr(struct kvm_vcpu *vcpu, unsigned long srr0, u32 srr1) 237 { 238 vcpu->arch.mcsrr0 = srr0; 239 vcpu->arch.mcsrr1 = srr1; 240 } 241 242 static unsigned long get_guest_dear(struct kvm_vcpu *vcpu) 243 { 244 #ifdef CONFIG_KVM_BOOKE_HV 245 return mfspr(SPRN_GDEAR); 246 #else 247 return vcpu->arch.shared->dar; 248 #endif 249 } 250 251 static void set_guest_dear(struct kvm_vcpu *vcpu, unsigned long dear) 252 { 253 #ifdef CONFIG_KVM_BOOKE_HV 254 mtspr(SPRN_GDEAR, dear); 255 #else 256 vcpu->arch.shared->dar = dear; 257 #endif 258 } 259 260 static unsigned long get_guest_esr(struct kvm_vcpu *vcpu) 261 { 262 #ifdef CONFIG_KVM_BOOKE_HV 263 return mfspr(SPRN_GESR); 264 #else 265 return vcpu->arch.shared->esr; 266 #endif 267 } 268 269 static void set_guest_esr(struct kvm_vcpu *vcpu, u32 esr) 270 { 271 #ifdef CONFIG_KVM_BOOKE_HV 272 mtspr(SPRN_GESR, esr); 273 #else 274 vcpu->arch.shared->esr = esr; 275 #endif 276 } 277 278 /* Deliver the interrupt of the corresponding priority, if possible. */ 279 static int kvmppc_booke_irqprio_deliver(struct kvm_vcpu *vcpu, 280 unsigned int priority) 281 { 282 int allowed = 0; 283 ulong msr_mask = 0; 284 bool update_esr = false, update_dear = false; 285 ulong crit_raw = vcpu->arch.shared->critical; 286 ulong crit_r1 = kvmppc_get_gpr(vcpu, 1); 287 bool crit; 288 bool keep_irq = false; 289 enum int_class int_class; 290 291 /* Truncate crit indicators in 32 bit mode */ 292 if (!(vcpu->arch.shared->msr & MSR_SF)) { 293 crit_raw &= 0xffffffff; 294 crit_r1 &= 0xffffffff; 295 } 296 297 /* Critical section when crit == r1 */ 298 crit = (crit_raw == crit_r1); 299 /* ... and we're in supervisor mode */ 300 crit = crit && !(vcpu->arch.shared->msr & MSR_PR); 301 302 if (priority == BOOKE_IRQPRIO_EXTERNAL_LEVEL) { 303 priority = BOOKE_IRQPRIO_EXTERNAL; 304 keep_irq = true; 305 } 306 307 switch (priority) { 308 case BOOKE_IRQPRIO_DTLB_MISS: 309 case BOOKE_IRQPRIO_DATA_STORAGE: 310 update_dear = true; 311 /* fall through */ 312 case BOOKE_IRQPRIO_INST_STORAGE: 313 case BOOKE_IRQPRIO_PROGRAM: 314 update_esr = true; 315 /* fall through */ 316 case BOOKE_IRQPRIO_ITLB_MISS: 317 case BOOKE_IRQPRIO_SYSCALL: 318 case BOOKE_IRQPRIO_FP_UNAVAIL: 319 case BOOKE_IRQPRIO_SPE_UNAVAIL: 320 case BOOKE_IRQPRIO_SPE_FP_DATA: 321 case BOOKE_IRQPRIO_SPE_FP_ROUND: 322 case BOOKE_IRQPRIO_AP_UNAVAIL: 323 case BOOKE_IRQPRIO_ALIGNMENT: 324 allowed = 1; 325 msr_mask = MSR_CE | MSR_ME | MSR_DE; 326 int_class = INT_CLASS_NONCRIT; 327 break; 328 case BOOKE_IRQPRIO_CRITICAL: 329 case BOOKE_IRQPRIO_DBELL_CRIT: 330 allowed = vcpu->arch.shared->msr & MSR_CE; 331 allowed = allowed && !crit; 332 msr_mask = MSR_ME; 333 int_class = INT_CLASS_CRIT; 334 break; 335 case BOOKE_IRQPRIO_MACHINE_CHECK: 336 allowed = vcpu->arch.shared->msr & MSR_ME; 337 allowed = allowed && !crit; 338 int_class = INT_CLASS_MC; 339 break; 340 case BOOKE_IRQPRIO_DECREMENTER: 341 case BOOKE_IRQPRIO_FIT: 342 keep_irq = true; 343 /* fall through */ 344 case BOOKE_IRQPRIO_EXTERNAL: 345 case BOOKE_IRQPRIO_DBELL: 346 allowed = vcpu->arch.shared->msr & MSR_EE; 347 allowed = allowed && !crit; 348 msr_mask = MSR_CE | MSR_ME | MSR_DE; 349 int_class = INT_CLASS_NONCRIT; 350 break; 351 case BOOKE_IRQPRIO_DEBUG: 352 allowed = vcpu->arch.shared->msr & MSR_DE; 353 allowed = allowed && !crit; 354 msr_mask = MSR_ME; 355 int_class = INT_CLASS_CRIT; 356 break; 357 } 358 359 if (allowed) { 360 switch (int_class) { 361 case INT_CLASS_NONCRIT: 362 set_guest_srr(vcpu, vcpu->arch.pc, 363 vcpu->arch.shared->msr); 364 break; 365 case INT_CLASS_CRIT: 366 set_guest_csrr(vcpu, vcpu->arch.pc, 367 vcpu->arch.shared->msr); 368 break; 369 case INT_CLASS_DBG: 370 set_guest_dsrr(vcpu, vcpu->arch.pc, 371 vcpu->arch.shared->msr); 372 break; 373 case INT_CLASS_MC: 374 set_guest_mcsrr(vcpu, vcpu->arch.pc, 375 vcpu->arch.shared->msr); 376 break; 377 } 378 379 vcpu->arch.pc = vcpu->arch.ivpr | vcpu->arch.ivor[priority]; 380 if (update_esr == true) 381 set_guest_esr(vcpu, vcpu->arch.queued_esr); 382 if (update_dear == true) 383 set_guest_dear(vcpu, vcpu->arch.queued_dear); 384 kvmppc_set_msr(vcpu, vcpu->arch.shared->msr & msr_mask); 385 386 if (!keep_irq) 387 clear_bit(priority, &vcpu->arch.pending_exceptions); 388 } 389 390 #ifdef CONFIG_KVM_BOOKE_HV 391 /* 392 * If an interrupt is pending but masked, raise a guest doorbell 393 * so that we are notified when the guest enables the relevant 394 * MSR bit. 395 */ 396 if (vcpu->arch.pending_exceptions & BOOKE_IRQMASK_EE) 397 kvmppc_set_pending_interrupt(vcpu, INT_CLASS_NONCRIT); 398 if (vcpu->arch.pending_exceptions & BOOKE_IRQMASK_CE) 399 kvmppc_set_pending_interrupt(vcpu, INT_CLASS_CRIT); 400 if (vcpu->arch.pending_exceptions & BOOKE_IRQPRIO_MACHINE_CHECK) 401 kvmppc_set_pending_interrupt(vcpu, INT_CLASS_MC); 402 #endif 403 404 return allowed; 405 } 406 407 static void update_timer_ints(struct kvm_vcpu *vcpu) 408 { 409 if ((vcpu->arch.tcr & TCR_DIE) && (vcpu->arch.tsr & TSR_DIS)) 410 kvmppc_core_queue_dec(vcpu); 411 else 412 kvmppc_core_dequeue_dec(vcpu); 413 } 414 415 static void kvmppc_core_check_exceptions(struct kvm_vcpu *vcpu) 416 { 417 unsigned long *pending = &vcpu->arch.pending_exceptions; 418 unsigned int priority; 419 420 if (vcpu->requests) { 421 if (kvm_check_request(KVM_REQ_PENDING_TIMER, vcpu)) { 422 smp_mb(); 423 update_timer_ints(vcpu); 424 } 425 } 426 427 priority = __ffs(*pending); 428 while (priority < BOOKE_IRQPRIO_MAX) { 429 if (kvmppc_booke_irqprio_deliver(vcpu, priority)) 430 break; 431 432 priority = find_next_bit(pending, 433 BITS_PER_BYTE * sizeof(*pending), 434 priority + 1); 435 } 436 437 /* Tell the guest about our interrupt status */ 438 vcpu->arch.shared->int_pending = !!*pending; 439 } 440 441 /* Check pending exceptions and deliver one, if possible. */ 442 int kvmppc_core_prepare_to_enter(struct kvm_vcpu *vcpu) 443 { 444 int r = 0; 445 WARN_ON_ONCE(!irqs_disabled()); 446 447 kvmppc_core_check_exceptions(vcpu); 448 449 if (vcpu->arch.shared->msr & MSR_WE) { 450 local_irq_enable(); 451 kvm_vcpu_block(vcpu); 452 clear_bit(KVM_REQ_UNHALT, &vcpu->requests); 453 local_irq_disable(); 454 455 kvmppc_set_exit_type(vcpu, EMULATED_MTMSRWE_EXITS); 456 r = 1; 457 }; 458 459 return r; 460 } 461 462 /* 463 * Common checks before entering the guest world. Call with interrupts 464 * disabled. 465 * 466 * returns !0 if a signal is pending and check_signal is true 467 */ 468 static int kvmppc_prepare_to_enter(struct kvm_vcpu *vcpu) 469 { 470 int r = 0; 471 472 WARN_ON_ONCE(!irqs_disabled()); 473 while (true) { 474 if (need_resched()) { 475 local_irq_enable(); 476 cond_resched(); 477 local_irq_disable(); 478 continue; 479 } 480 481 if (signal_pending(current)) { 482 r = 1; 483 break; 484 } 485 486 if (kvmppc_core_prepare_to_enter(vcpu)) { 487 /* interrupts got enabled in between, so we 488 are back at square 1 */ 489 continue; 490 } 491 492 break; 493 } 494 495 return r; 496 } 497 498 int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu) 499 { 500 int ret; 501 #ifdef CONFIG_PPC_FPU 502 unsigned int fpscr; 503 int fpexc_mode; 504 u64 fpr[32]; 505 #endif 506 507 if (!vcpu->arch.sane) { 508 kvm_run->exit_reason = KVM_EXIT_INTERNAL_ERROR; 509 return -EINVAL; 510 } 511 512 local_irq_disable(); 513 if (kvmppc_prepare_to_enter(vcpu)) { 514 kvm_run->exit_reason = KVM_EXIT_INTR; 515 ret = -EINTR; 516 goto out; 517 } 518 519 kvm_guest_enter(); 520 521 #ifdef CONFIG_PPC_FPU 522 /* Save userspace FPU state in stack */ 523 enable_kernel_fp(); 524 memcpy(fpr, current->thread.fpr, sizeof(current->thread.fpr)); 525 fpscr = current->thread.fpscr.val; 526 fpexc_mode = current->thread.fpexc_mode; 527 528 /* Restore guest FPU state to thread */ 529 memcpy(current->thread.fpr, vcpu->arch.fpr, sizeof(vcpu->arch.fpr)); 530 current->thread.fpscr.val = vcpu->arch.fpscr; 531 532 /* 533 * Since we can't trap on MSR_FP in GS-mode, we consider the guest 534 * as always using the FPU. Kernel usage of FP (via 535 * enable_kernel_fp()) in this thread must not occur while 536 * vcpu->fpu_active is set. 537 */ 538 vcpu->fpu_active = 1; 539 540 kvmppc_load_guest_fp(vcpu); 541 #endif 542 543 ret = __kvmppc_vcpu_run(kvm_run, vcpu); 544 545 #ifdef CONFIG_PPC_FPU 546 kvmppc_save_guest_fp(vcpu); 547 548 vcpu->fpu_active = 0; 549 550 /* Save guest FPU state from thread */ 551 memcpy(vcpu->arch.fpr, current->thread.fpr, sizeof(vcpu->arch.fpr)); 552 vcpu->arch.fpscr = current->thread.fpscr.val; 553 554 /* Restore userspace FPU state from stack */ 555 memcpy(current->thread.fpr, fpr, sizeof(current->thread.fpr)); 556 current->thread.fpscr.val = fpscr; 557 current->thread.fpexc_mode = fpexc_mode; 558 #endif 559 560 kvm_guest_exit(); 561 562 out: 563 local_irq_enable(); 564 return ret; 565 } 566 567 static int emulation_exit(struct kvm_run *run, struct kvm_vcpu *vcpu) 568 { 569 enum emulation_result er; 570 571 er = kvmppc_emulate_instruction(run, vcpu); 572 switch (er) { 573 case EMULATE_DONE: 574 /* don't overwrite subtypes, just account kvm_stats */ 575 kvmppc_account_exit_stat(vcpu, EMULATED_INST_EXITS); 576 /* Future optimization: only reload non-volatiles if 577 * they were actually modified by emulation. */ 578 return RESUME_GUEST_NV; 579 580 case EMULATE_DO_DCR: 581 run->exit_reason = KVM_EXIT_DCR; 582 return RESUME_HOST; 583 584 case EMULATE_FAIL: 585 printk(KERN_CRIT "%s: emulation at %lx failed (%08x)\n", 586 __func__, vcpu->arch.pc, vcpu->arch.last_inst); 587 /* For debugging, encode the failing instruction and 588 * report it to userspace. */ 589 run->hw.hardware_exit_reason = ~0ULL << 32; 590 run->hw.hardware_exit_reason |= vcpu->arch.last_inst; 591 kvmppc_core_queue_program(vcpu, ESR_PIL); 592 return RESUME_HOST; 593 594 default: 595 BUG(); 596 } 597 } 598 599 static void kvmppc_fill_pt_regs(struct pt_regs *regs) 600 { 601 ulong r1, ip, msr, lr; 602 603 asm("mr %0, 1" : "=r"(r1)); 604 asm("mflr %0" : "=r"(lr)); 605 asm("mfmsr %0" : "=r"(msr)); 606 asm("bl 1f; 1: mflr %0" : "=r"(ip)); 607 608 memset(regs, 0, sizeof(*regs)); 609 regs->gpr[1] = r1; 610 regs->nip = ip; 611 regs->msr = msr; 612 regs->link = lr; 613 } 614 615 /* 616 * For interrupts needed to be handled by host interrupt handlers, 617 * corresponding host handler are called from here in similar way 618 * (but not exact) as they are called from low level handler 619 * (such as from arch/powerpc/kernel/head_fsl_booke.S). 620 */ 621 static void kvmppc_restart_interrupt(struct kvm_vcpu *vcpu, 622 unsigned int exit_nr) 623 { 624 struct pt_regs regs; 625 626 switch (exit_nr) { 627 case BOOKE_INTERRUPT_EXTERNAL: 628 kvmppc_fill_pt_regs(®s); 629 do_IRQ(®s); 630 break; 631 case BOOKE_INTERRUPT_DECREMENTER: 632 kvmppc_fill_pt_regs(®s); 633 timer_interrupt(®s); 634 break; 635 #if defined(CONFIG_PPC_FSL_BOOK3E) || defined(CONFIG_PPC_BOOK3E_64) 636 case BOOKE_INTERRUPT_DOORBELL: 637 kvmppc_fill_pt_regs(®s); 638 doorbell_exception(®s); 639 break; 640 #endif 641 case BOOKE_INTERRUPT_MACHINE_CHECK: 642 /* FIXME */ 643 break; 644 case BOOKE_INTERRUPT_PERFORMANCE_MONITOR: 645 kvmppc_fill_pt_regs(®s); 646 performance_monitor_exception(®s); 647 break; 648 case BOOKE_INTERRUPT_WATCHDOG: 649 kvmppc_fill_pt_regs(®s); 650 #ifdef CONFIG_BOOKE_WDT 651 WatchdogException(®s); 652 #else 653 unknown_exception(®s); 654 #endif 655 break; 656 case BOOKE_INTERRUPT_CRITICAL: 657 unknown_exception(®s); 658 break; 659 } 660 } 661 662 /** 663 * kvmppc_handle_exit 664 * 665 * Return value is in the form (errcode<<2 | RESUME_FLAG_HOST | RESUME_FLAG_NV) 666 */ 667 int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu, 668 unsigned int exit_nr) 669 { 670 int r = RESUME_HOST; 671 672 /* update before a new last_exit_type is rewritten */ 673 kvmppc_update_timing_stats(vcpu); 674 675 /* restart interrupts if they were meant for the host */ 676 kvmppc_restart_interrupt(vcpu, exit_nr); 677 678 local_irq_enable(); 679 680 run->exit_reason = KVM_EXIT_UNKNOWN; 681 run->ready_for_interrupt_injection = 1; 682 683 switch (exit_nr) { 684 case BOOKE_INTERRUPT_MACHINE_CHECK: 685 printk("MACHINE CHECK: %lx\n", mfspr(SPRN_MCSR)); 686 kvmppc_dump_vcpu(vcpu); 687 /* For debugging, send invalid exit reason to user space */ 688 run->hw.hardware_exit_reason = ~1ULL << 32; 689 run->hw.hardware_exit_reason |= mfspr(SPRN_MCSR); 690 r = RESUME_HOST; 691 break; 692 693 case BOOKE_INTERRUPT_EXTERNAL: 694 kvmppc_account_exit(vcpu, EXT_INTR_EXITS); 695 r = RESUME_GUEST; 696 break; 697 698 case BOOKE_INTERRUPT_DECREMENTER: 699 kvmppc_account_exit(vcpu, DEC_EXITS); 700 r = RESUME_GUEST; 701 break; 702 703 case BOOKE_INTERRUPT_WATCHDOG: 704 r = RESUME_GUEST; 705 break; 706 707 case BOOKE_INTERRUPT_DOORBELL: 708 kvmppc_account_exit(vcpu, DBELL_EXITS); 709 r = RESUME_GUEST; 710 break; 711 712 case BOOKE_INTERRUPT_GUEST_DBELL_CRIT: 713 kvmppc_account_exit(vcpu, GDBELL_EXITS); 714 715 /* 716 * We are here because there is a pending guest interrupt 717 * which could not be delivered as MSR_CE or MSR_ME was not 718 * set. Once we break from here we will retry delivery. 719 */ 720 r = RESUME_GUEST; 721 break; 722 723 case BOOKE_INTERRUPT_GUEST_DBELL: 724 kvmppc_account_exit(vcpu, GDBELL_EXITS); 725 726 /* 727 * We are here because there is a pending guest interrupt 728 * which could not be delivered as MSR_EE was not set. Once 729 * we break from here we will retry delivery. 730 */ 731 r = RESUME_GUEST; 732 break; 733 734 case BOOKE_INTERRUPT_PERFORMANCE_MONITOR: 735 r = RESUME_GUEST; 736 break; 737 738 case BOOKE_INTERRUPT_HV_PRIV: 739 r = emulation_exit(run, vcpu); 740 break; 741 742 case BOOKE_INTERRUPT_PROGRAM: 743 if (vcpu->arch.shared->msr & (MSR_PR | MSR_GS)) { 744 /* 745 * Program traps generated by user-level software must 746 * be handled by the guest kernel. 747 * 748 * In GS mode, hypervisor privileged instructions trap 749 * on BOOKE_INTERRUPT_HV_PRIV, not here, so these are 750 * actual program interrupts, handled by the guest. 751 */ 752 kvmppc_core_queue_program(vcpu, vcpu->arch.fault_esr); 753 r = RESUME_GUEST; 754 kvmppc_account_exit(vcpu, USR_PR_INST); 755 break; 756 } 757 758 r = emulation_exit(run, vcpu); 759 break; 760 761 case BOOKE_INTERRUPT_FP_UNAVAIL: 762 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_FP_UNAVAIL); 763 kvmppc_account_exit(vcpu, FP_UNAVAIL); 764 r = RESUME_GUEST; 765 break; 766 767 #ifdef CONFIG_SPE 768 case BOOKE_INTERRUPT_SPE_UNAVAIL: { 769 if (vcpu->arch.shared->msr & MSR_SPE) 770 kvmppc_vcpu_enable_spe(vcpu); 771 else 772 kvmppc_booke_queue_irqprio(vcpu, 773 BOOKE_IRQPRIO_SPE_UNAVAIL); 774 r = RESUME_GUEST; 775 break; 776 } 777 778 case BOOKE_INTERRUPT_SPE_FP_DATA: 779 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SPE_FP_DATA); 780 r = RESUME_GUEST; 781 break; 782 783 case BOOKE_INTERRUPT_SPE_FP_ROUND: 784 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SPE_FP_ROUND); 785 r = RESUME_GUEST; 786 break; 787 #else 788 case BOOKE_INTERRUPT_SPE_UNAVAIL: 789 /* 790 * Guest wants SPE, but host kernel doesn't support it. Send 791 * an "unimplemented operation" program check to the guest. 792 */ 793 kvmppc_core_queue_program(vcpu, ESR_PUO | ESR_SPV); 794 r = RESUME_GUEST; 795 break; 796 797 /* 798 * These really should never happen without CONFIG_SPE, 799 * as we should never enable the real MSR[SPE] in the guest. 800 */ 801 case BOOKE_INTERRUPT_SPE_FP_DATA: 802 case BOOKE_INTERRUPT_SPE_FP_ROUND: 803 printk(KERN_CRIT "%s: unexpected SPE interrupt %u at %08lx\n", 804 __func__, exit_nr, vcpu->arch.pc); 805 run->hw.hardware_exit_reason = exit_nr; 806 r = RESUME_HOST; 807 break; 808 #endif 809 810 case BOOKE_INTERRUPT_DATA_STORAGE: 811 kvmppc_core_queue_data_storage(vcpu, vcpu->arch.fault_dear, 812 vcpu->arch.fault_esr); 813 kvmppc_account_exit(vcpu, DSI_EXITS); 814 r = RESUME_GUEST; 815 break; 816 817 case BOOKE_INTERRUPT_INST_STORAGE: 818 kvmppc_core_queue_inst_storage(vcpu, vcpu->arch.fault_esr); 819 kvmppc_account_exit(vcpu, ISI_EXITS); 820 r = RESUME_GUEST; 821 break; 822 823 #ifdef CONFIG_KVM_BOOKE_HV 824 case BOOKE_INTERRUPT_HV_SYSCALL: 825 if (!(vcpu->arch.shared->msr & MSR_PR)) { 826 kvmppc_set_gpr(vcpu, 3, kvmppc_kvm_pv(vcpu)); 827 } else { 828 /* 829 * hcall from guest userspace -- send privileged 830 * instruction program check. 831 */ 832 kvmppc_core_queue_program(vcpu, ESR_PPR); 833 } 834 835 r = RESUME_GUEST; 836 break; 837 #else 838 case BOOKE_INTERRUPT_SYSCALL: 839 if (!(vcpu->arch.shared->msr & MSR_PR) && 840 (((u32)kvmppc_get_gpr(vcpu, 0)) == KVM_SC_MAGIC_R0)) { 841 /* KVM PV hypercalls */ 842 kvmppc_set_gpr(vcpu, 3, kvmppc_kvm_pv(vcpu)); 843 r = RESUME_GUEST; 844 } else { 845 /* Guest syscalls */ 846 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SYSCALL); 847 } 848 kvmppc_account_exit(vcpu, SYSCALL_EXITS); 849 r = RESUME_GUEST; 850 break; 851 #endif 852 853 case BOOKE_INTERRUPT_DTLB_MISS: { 854 unsigned long eaddr = vcpu->arch.fault_dear; 855 int gtlb_index; 856 gpa_t gpaddr; 857 gfn_t gfn; 858 859 #ifdef CONFIG_KVM_E500V2 860 if (!(vcpu->arch.shared->msr & MSR_PR) && 861 (eaddr & PAGE_MASK) == vcpu->arch.magic_page_ea) { 862 kvmppc_map_magic(vcpu); 863 kvmppc_account_exit(vcpu, DTLB_VIRT_MISS_EXITS); 864 r = RESUME_GUEST; 865 866 break; 867 } 868 #endif 869 870 /* Check the guest TLB. */ 871 gtlb_index = kvmppc_mmu_dtlb_index(vcpu, eaddr); 872 if (gtlb_index < 0) { 873 /* The guest didn't have a mapping for it. */ 874 kvmppc_core_queue_dtlb_miss(vcpu, 875 vcpu->arch.fault_dear, 876 vcpu->arch.fault_esr); 877 kvmppc_mmu_dtlb_miss(vcpu); 878 kvmppc_account_exit(vcpu, DTLB_REAL_MISS_EXITS); 879 r = RESUME_GUEST; 880 break; 881 } 882 883 gpaddr = kvmppc_mmu_xlate(vcpu, gtlb_index, eaddr); 884 gfn = gpaddr >> PAGE_SHIFT; 885 886 if (kvm_is_visible_gfn(vcpu->kvm, gfn)) { 887 /* The guest TLB had a mapping, but the shadow TLB 888 * didn't, and it is RAM. This could be because: 889 * a) the entry is mapping the host kernel, or 890 * b) the guest used a large mapping which we're faking 891 * Either way, we need to satisfy the fault without 892 * invoking the guest. */ 893 kvmppc_mmu_map(vcpu, eaddr, gpaddr, gtlb_index); 894 kvmppc_account_exit(vcpu, DTLB_VIRT_MISS_EXITS); 895 r = RESUME_GUEST; 896 } else { 897 /* Guest has mapped and accessed a page which is not 898 * actually RAM. */ 899 vcpu->arch.paddr_accessed = gpaddr; 900 vcpu->arch.vaddr_accessed = eaddr; 901 r = kvmppc_emulate_mmio(run, vcpu); 902 kvmppc_account_exit(vcpu, MMIO_EXITS); 903 } 904 905 break; 906 } 907 908 case BOOKE_INTERRUPT_ITLB_MISS: { 909 unsigned long eaddr = vcpu->arch.pc; 910 gpa_t gpaddr; 911 gfn_t gfn; 912 int gtlb_index; 913 914 r = RESUME_GUEST; 915 916 /* Check the guest TLB. */ 917 gtlb_index = kvmppc_mmu_itlb_index(vcpu, eaddr); 918 if (gtlb_index < 0) { 919 /* The guest didn't have a mapping for it. */ 920 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ITLB_MISS); 921 kvmppc_mmu_itlb_miss(vcpu); 922 kvmppc_account_exit(vcpu, ITLB_REAL_MISS_EXITS); 923 break; 924 } 925 926 kvmppc_account_exit(vcpu, ITLB_VIRT_MISS_EXITS); 927 928 gpaddr = kvmppc_mmu_xlate(vcpu, gtlb_index, eaddr); 929 gfn = gpaddr >> PAGE_SHIFT; 930 931 if (kvm_is_visible_gfn(vcpu->kvm, gfn)) { 932 /* The guest TLB had a mapping, but the shadow TLB 933 * didn't. This could be because: 934 * a) the entry is mapping the host kernel, or 935 * b) the guest used a large mapping which we're faking 936 * Either way, we need to satisfy the fault without 937 * invoking the guest. */ 938 kvmppc_mmu_map(vcpu, eaddr, gpaddr, gtlb_index); 939 } else { 940 /* Guest mapped and leaped at non-RAM! */ 941 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_MACHINE_CHECK); 942 } 943 944 break; 945 } 946 947 case BOOKE_INTERRUPT_DEBUG: { 948 u32 dbsr; 949 950 vcpu->arch.pc = mfspr(SPRN_CSRR0); 951 952 /* clear IAC events in DBSR register */ 953 dbsr = mfspr(SPRN_DBSR); 954 dbsr &= DBSR_IAC1 | DBSR_IAC2 | DBSR_IAC3 | DBSR_IAC4; 955 mtspr(SPRN_DBSR, dbsr); 956 957 run->exit_reason = KVM_EXIT_DEBUG; 958 kvmppc_account_exit(vcpu, DEBUG_EXITS); 959 r = RESUME_HOST; 960 break; 961 } 962 963 default: 964 printk(KERN_EMERG "exit_nr %d\n", exit_nr); 965 BUG(); 966 } 967 968 /* 969 * To avoid clobbering exit_reason, only check for signals if we 970 * aren't already exiting to userspace for some other reason. 971 */ 972 if (!(r & RESUME_HOST)) { 973 local_irq_disable(); 974 if (kvmppc_prepare_to_enter(vcpu)) { 975 run->exit_reason = KVM_EXIT_INTR; 976 r = (-EINTR << 2) | RESUME_HOST | (r & RESUME_FLAG_NV); 977 kvmppc_account_exit(vcpu, SIGNAL_EXITS); 978 } 979 } 980 981 return r; 982 } 983 984 /* Initial guest state: 16MB mapping 0 -> 0, PC = 0, MSR = 0, R1 = 16MB */ 985 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) 986 { 987 int i; 988 int r; 989 990 vcpu->arch.pc = 0; 991 vcpu->arch.shared->pir = vcpu->vcpu_id; 992 kvmppc_set_gpr(vcpu, 1, (16<<20) - 8); /* -8 for the callee-save LR slot */ 993 kvmppc_set_msr(vcpu, 0); 994 995 #ifndef CONFIG_KVM_BOOKE_HV 996 vcpu->arch.shadow_msr = MSR_USER | MSR_DE | MSR_IS | MSR_DS; 997 vcpu->arch.shadow_pid = 1; 998 vcpu->arch.shared->msr = 0; 999 #endif 1000 1001 /* Eye-catching numbers so we know if the guest takes an interrupt 1002 * before it's programmed its own IVPR/IVORs. */ 1003 vcpu->arch.ivpr = 0x55550000; 1004 for (i = 0; i < BOOKE_IRQPRIO_MAX; i++) 1005 vcpu->arch.ivor[i] = 0x7700 | i * 4; 1006 1007 kvmppc_init_timing_stats(vcpu); 1008 1009 r = kvmppc_core_vcpu_setup(vcpu); 1010 kvmppc_sanity_check(vcpu); 1011 return r; 1012 } 1013 1014 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) 1015 { 1016 int i; 1017 1018 regs->pc = vcpu->arch.pc; 1019 regs->cr = kvmppc_get_cr(vcpu); 1020 regs->ctr = vcpu->arch.ctr; 1021 regs->lr = vcpu->arch.lr; 1022 regs->xer = kvmppc_get_xer(vcpu); 1023 regs->msr = vcpu->arch.shared->msr; 1024 regs->srr0 = vcpu->arch.shared->srr0; 1025 regs->srr1 = vcpu->arch.shared->srr1; 1026 regs->pid = vcpu->arch.pid; 1027 regs->sprg0 = vcpu->arch.shared->sprg0; 1028 regs->sprg1 = vcpu->arch.shared->sprg1; 1029 regs->sprg2 = vcpu->arch.shared->sprg2; 1030 regs->sprg3 = vcpu->arch.shared->sprg3; 1031 regs->sprg4 = vcpu->arch.shared->sprg4; 1032 regs->sprg5 = vcpu->arch.shared->sprg5; 1033 regs->sprg6 = vcpu->arch.shared->sprg6; 1034 regs->sprg7 = vcpu->arch.shared->sprg7; 1035 1036 for (i = 0; i < ARRAY_SIZE(regs->gpr); i++) 1037 regs->gpr[i] = kvmppc_get_gpr(vcpu, i); 1038 1039 return 0; 1040 } 1041 1042 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) 1043 { 1044 int i; 1045 1046 vcpu->arch.pc = regs->pc; 1047 kvmppc_set_cr(vcpu, regs->cr); 1048 vcpu->arch.ctr = regs->ctr; 1049 vcpu->arch.lr = regs->lr; 1050 kvmppc_set_xer(vcpu, regs->xer); 1051 kvmppc_set_msr(vcpu, regs->msr); 1052 vcpu->arch.shared->srr0 = regs->srr0; 1053 vcpu->arch.shared->srr1 = regs->srr1; 1054 kvmppc_set_pid(vcpu, regs->pid); 1055 vcpu->arch.shared->sprg0 = regs->sprg0; 1056 vcpu->arch.shared->sprg1 = regs->sprg1; 1057 vcpu->arch.shared->sprg2 = regs->sprg2; 1058 vcpu->arch.shared->sprg3 = regs->sprg3; 1059 vcpu->arch.shared->sprg4 = regs->sprg4; 1060 vcpu->arch.shared->sprg5 = regs->sprg5; 1061 vcpu->arch.shared->sprg6 = regs->sprg6; 1062 vcpu->arch.shared->sprg7 = regs->sprg7; 1063 1064 for (i = 0; i < ARRAY_SIZE(regs->gpr); i++) 1065 kvmppc_set_gpr(vcpu, i, regs->gpr[i]); 1066 1067 return 0; 1068 } 1069 1070 static void get_sregs_base(struct kvm_vcpu *vcpu, 1071 struct kvm_sregs *sregs) 1072 { 1073 u64 tb = get_tb(); 1074 1075 sregs->u.e.features |= KVM_SREGS_E_BASE; 1076 1077 sregs->u.e.csrr0 = vcpu->arch.csrr0; 1078 sregs->u.e.csrr1 = vcpu->arch.csrr1; 1079 sregs->u.e.mcsr = vcpu->arch.mcsr; 1080 sregs->u.e.esr = get_guest_esr(vcpu); 1081 sregs->u.e.dear = get_guest_dear(vcpu); 1082 sregs->u.e.tsr = vcpu->arch.tsr; 1083 sregs->u.e.tcr = vcpu->arch.tcr; 1084 sregs->u.e.dec = kvmppc_get_dec(vcpu, tb); 1085 sregs->u.e.tb = tb; 1086 sregs->u.e.vrsave = vcpu->arch.vrsave; 1087 } 1088 1089 static int set_sregs_base(struct kvm_vcpu *vcpu, 1090 struct kvm_sregs *sregs) 1091 { 1092 if (!(sregs->u.e.features & KVM_SREGS_E_BASE)) 1093 return 0; 1094 1095 vcpu->arch.csrr0 = sregs->u.e.csrr0; 1096 vcpu->arch.csrr1 = sregs->u.e.csrr1; 1097 vcpu->arch.mcsr = sregs->u.e.mcsr; 1098 set_guest_esr(vcpu, sregs->u.e.esr); 1099 set_guest_dear(vcpu, sregs->u.e.dear); 1100 vcpu->arch.vrsave = sregs->u.e.vrsave; 1101 kvmppc_set_tcr(vcpu, sregs->u.e.tcr); 1102 1103 if (sregs->u.e.update_special & KVM_SREGS_E_UPDATE_DEC) { 1104 vcpu->arch.dec = sregs->u.e.dec; 1105 kvmppc_emulate_dec(vcpu); 1106 } 1107 1108 if (sregs->u.e.update_special & KVM_SREGS_E_UPDATE_TSR) { 1109 vcpu->arch.tsr = sregs->u.e.tsr; 1110 update_timer_ints(vcpu); 1111 } 1112 1113 return 0; 1114 } 1115 1116 static void get_sregs_arch206(struct kvm_vcpu *vcpu, 1117 struct kvm_sregs *sregs) 1118 { 1119 sregs->u.e.features |= KVM_SREGS_E_ARCH206; 1120 1121 sregs->u.e.pir = vcpu->vcpu_id; 1122 sregs->u.e.mcsrr0 = vcpu->arch.mcsrr0; 1123 sregs->u.e.mcsrr1 = vcpu->arch.mcsrr1; 1124 sregs->u.e.decar = vcpu->arch.decar; 1125 sregs->u.e.ivpr = vcpu->arch.ivpr; 1126 } 1127 1128 static int set_sregs_arch206(struct kvm_vcpu *vcpu, 1129 struct kvm_sregs *sregs) 1130 { 1131 if (!(sregs->u.e.features & KVM_SREGS_E_ARCH206)) 1132 return 0; 1133 1134 if (sregs->u.e.pir != vcpu->vcpu_id) 1135 return -EINVAL; 1136 1137 vcpu->arch.mcsrr0 = sregs->u.e.mcsrr0; 1138 vcpu->arch.mcsrr1 = sregs->u.e.mcsrr1; 1139 vcpu->arch.decar = sregs->u.e.decar; 1140 vcpu->arch.ivpr = sregs->u.e.ivpr; 1141 1142 return 0; 1143 } 1144 1145 void kvmppc_get_sregs_ivor(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs) 1146 { 1147 sregs->u.e.features |= KVM_SREGS_E_IVOR; 1148 1149 sregs->u.e.ivor_low[0] = vcpu->arch.ivor[BOOKE_IRQPRIO_CRITICAL]; 1150 sregs->u.e.ivor_low[1] = vcpu->arch.ivor[BOOKE_IRQPRIO_MACHINE_CHECK]; 1151 sregs->u.e.ivor_low[2] = vcpu->arch.ivor[BOOKE_IRQPRIO_DATA_STORAGE]; 1152 sregs->u.e.ivor_low[3] = vcpu->arch.ivor[BOOKE_IRQPRIO_INST_STORAGE]; 1153 sregs->u.e.ivor_low[4] = vcpu->arch.ivor[BOOKE_IRQPRIO_EXTERNAL]; 1154 sregs->u.e.ivor_low[5] = vcpu->arch.ivor[BOOKE_IRQPRIO_ALIGNMENT]; 1155 sregs->u.e.ivor_low[6] = vcpu->arch.ivor[BOOKE_IRQPRIO_PROGRAM]; 1156 sregs->u.e.ivor_low[7] = vcpu->arch.ivor[BOOKE_IRQPRIO_FP_UNAVAIL]; 1157 sregs->u.e.ivor_low[8] = vcpu->arch.ivor[BOOKE_IRQPRIO_SYSCALL]; 1158 sregs->u.e.ivor_low[9] = vcpu->arch.ivor[BOOKE_IRQPRIO_AP_UNAVAIL]; 1159 sregs->u.e.ivor_low[10] = vcpu->arch.ivor[BOOKE_IRQPRIO_DECREMENTER]; 1160 sregs->u.e.ivor_low[11] = vcpu->arch.ivor[BOOKE_IRQPRIO_FIT]; 1161 sregs->u.e.ivor_low[12] = vcpu->arch.ivor[BOOKE_IRQPRIO_WATCHDOG]; 1162 sregs->u.e.ivor_low[13] = vcpu->arch.ivor[BOOKE_IRQPRIO_DTLB_MISS]; 1163 sregs->u.e.ivor_low[14] = vcpu->arch.ivor[BOOKE_IRQPRIO_ITLB_MISS]; 1164 sregs->u.e.ivor_low[15] = vcpu->arch.ivor[BOOKE_IRQPRIO_DEBUG]; 1165 } 1166 1167 int kvmppc_set_sregs_ivor(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs) 1168 { 1169 if (!(sregs->u.e.features & KVM_SREGS_E_IVOR)) 1170 return 0; 1171 1172 vcpu->arch.ivor[BOOKE_IRQPRIO_CRITICAL] = sregs->u.e.ivor_low[0]; 1173 vcpu->arch.ivor[BOOKE_IRQPRIO_MACHINE_CHECK] = sregs->u.e.ivor_low[1]; 1174 vcpu->arch.ivor[BOOKE_IRQPRIO_DATA_STORAGE] = sregs->u.e.ivor_low[2]; 1175 vcpu->arch.ivor[BOOKE_IRQPRIO_INST_STORAGE] = sregs->u.e.ivor_low[3]; 1176 vcpu->arch.ivor[BOOKE_IRQPRIO_EXTERNAL] = sregs->u.e.ivor_low[4]; 1177 vcpu->arch.ivor[BOOKE_IRQPRIO_ALIGNMENT] = sregs->u.e.ivor_low[5]; 1178 vcpu->arch.ivor[BOOKE_IRQPRIO_PROGRAM] = sregs->u.e.ivor_low[6]; 1179 vcpu->arch.ivor[BOOKE_IRQPRIO_FP_UNAVAIL] = sregs->u.e.ivor_low[7]; 1180 vcpu->arch.ivor[BOOKE_IRQPRIO_SYSCALL] = sregs->u.e.ivor_low[8]; 1181 vcpu->arch.ivor[BOOKE_IRQPRIO_AP_UNAVAIL] = sregs->u.e.ivor_low[9]; 1182 vcpu->arch.ivor[BOOKE_IRQPRIO_DECREMENTER] = sregs->u.e.ivor_low[10]; 1183 vcpu->arch.ivor[BOOKE_IRQPRIO_FIT] = sregs->u.e.ivor_low[11]; 1184 vcpu->arch.ivor[BOOKE_IRQPRIO_WATCHDOG] = sregs->u.e.ivor_low[12]; 1185 vcpu->arch.ivor[BOOKE_IRQPRIO_DTLB_MISS] = sregs->u.e.ivor_low[13]; 1186 vcpu->arch.ivor[BOOKE_IRQPRIO_ITLB_MISS] = sregs->u.e.ivor_low[14]; 1187 vcpu->arch.ivor[BOOKE_IRQPRIO_DEBUG] = sregs->u.e.ivor_low[15]; 1188 1189 return 0; 1190 } 1191 1192 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, 1193 struct kvm_sregs *sregs) 1194 { 1195 sregs->pvr = vcpu->arch.pvr; 1196 1197 get_sregs_base(vcpu, sregs); 1198 get_sregs_arch206(vcpu, sregs); 1199 kvmppc_core_get_sregs(vcpu, sregs); 1200 return 0; 1201 } 1202 1203 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, 1204 struct kvm_sregs *sregs) 1205 { 1206 int ret; 1207 1208 if (vcpu->arch.pvr != sregs->pvr) 1209 return -EINVAL; 1210 1211 ret = set_sregs_base(vcpu, sregs); 1212 if (ret < 0) 1213 return ret; 1214 1215 ret = set_sregs_arch206(vcpu, sregs); 1216 if (ret < 0) 1217 return ret; 1218 1219 return kvmppc_core_set_sregs(vcpu, sregs); 1220 } 1221 1222 int kvm_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg) 1223 { 1224 return -EINVAL; 1225 } 1226 1227 int kvm_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg) 1228 { 1229 return -EINVAL; 1230 } 1231 1232 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) 1233 { 1234 return -ENOTSUPP; 1235 } 1236 1237 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) 1238 { 1239 return -ENOTSUPP; 1240 } 1241 1242 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, 1243 struct kvm_translation *tr) 1244 { 1245 int r; 1246 1247 r = kvmppc_core_vcpu_translate(vcpu, tr); 1248 return r; 1249 } 1250 1251 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log) 1252 { 1253 return -ENOTSUPP; 1254 } 1255 1256 int kvmppc_core_prepare_memory_region(struct kvm *kvm, 1257 struct kvm_userspace_memory_region *mem) 1258 { 1259 return 0; 1260 } 1261 1262 void kvmppc_core_commit_memory_region(struct kvm *kvm, 1263 struct kvm_userspace_memory_region *mem) 1264 { 1265 } 1266 1267 void kvmppc_set_tcr(struct kvm_vcpu *vcpu, u32 new_tcr) 1268 { 1269 vcpu->arch.tcr = new_tcr; 1270 update_timer_ints(vcpu); 1271 } 1272 1273 void kvmppc_set_tsr_bits(struct kvm_vcpu *vcpu, u32 tsr_bits) 1274 { 1275 set_bits(tsr_bits, &vcpu->arch.tsr); 1276 smp_wmb(); 1277 kvm_make_request(KVM_REQ_PENDING_TIMER, vcpu); 1278 kvm_vcpu_kick(vcpu); 1279 } 1280 1281 void kvmppc_clr_tsr_bits(struct kvm_vcpu *vcpu, u32 tsr_bits) 1282 { 1283 clear_bits(tsr_bits, &vcpu->arch.tsr); 1284 update_timer_ints(vcpu); 1285 } 1286 1287 void kvmppc_decrementer_func(unsigned long data) 1288 { 1289 struct kvm_vcpu *vcpu = (struct kvm_vcpu *)data; 1290 1291 if (vcpu->arch.tcr & TCR_ARE) { 1292 vcpu->arch.dec = vcpu->arch.decar; 1293 kvmppc_emulate_dec(vcpu); 1294 } 1295 1296 kvmppc_set_tsr_bits(vcpu, TSR_DIS); 1297 } 1298 1299 void kvmppc_booke_vcpu_load(struct kvm_vcpu *vcpu, int cpu) 1300 { 1301 current->thread.kvm_vcpu = vcpu; 1302 } 1303 1304 void kvmppc_booke_vcpu_put(struct kvm_vcpu *vcpu) 1305 { 1306 current->thread.kvm_vcpu = NULL; 1307 } 1308 1309 int __init kvmppc_booke_init(void) 1310 { 1311 #ifndef CONFIG_KVM_BOOKE_HV 1312 unsigned long ivor[16]; 1313 unsigned long max_ivor = 0; 1314 int i; 1315 1316 /* We install our own exception handlers by hijacking IVPR. IVPR must 1317 * be 16-bit aligned, so we need a 64KB allocation. */ 1318 kvmppc_booke_handlers = __get_free_pages(GFP_KERNEL | __GFP_ZERO, 1319 VCPU_SIZE_ORDER); 1320 if (!kvmppc_booke_handlers) 1321 return -ENOMEM; 1322 1323 /* XXX make sure our handlers are smaller than Linux's */ 1324 1325 /* Copy our interrupt handlers to match host IVORs. That way we don't 1326 * have to swap the IVORs on every guest/host transition. */ 1327 ivor[0] = mfspr(SPRN_IVOR0); 1328 ivor[1] = mfspr(SPRN_IVOR1); 1329 ivor[2] = mfspr(SPRN_IVOR2); 1330 ivor[3] = mfspr(SPRN_IVOR3); 1331 ivor[4] = mfspr(SPRN_IVOR4); 1332 ivor[5] = mfspr(SPRN_IVOR5); 1333 ivor[6] = mfspr(SPRN_IVOR6); 1334 ivor[7] = mfspr(SPRN_IVOR7); 1335 ivor[8] = mfspr(SPRN_IVOR8); 1336 ivor[9] = mfspr(SPRN_IVOR9); 1337 ivor[10] = mfspr(SPRN_IVOR10); 1338 ivor[11] = mfspr(SPRN_IVOR11); 1339 ivor[12] = mfspr(SPRN_IVOR12); 1340 ivor[13] = mfspr(SPRN_IVOR13); 1341 ivor[14] = mfspr(SPRN_IVOR14); 1342 ivor[15] = mfspr(SPRN_IVOR15); 1343 1344 for (i = 0; i < 16; i++) { 1345 if (ivor[i] > max_ivor) 1346 max_ivor = ivor[i]; 1347 1348 memcpy((void *)kvmppc_booke_handlers + ivor[i], 1349 kvmppc_handlers_start + i * kvmppc_handler_len, 1350 kvmppc_handler_len); 1351 } 1352 flush_icache_range(kvmppc_booke_handlers, 1353 kvmppc_booke_handlers + max_ivor + kvmppc_handler_len); 1354 #endif /* !BOOKE_HV */ 1355 return 0; 1356 } 1357 1358 void __exit kvmppc_booke_exit(void) 1359 { 1360 free_pages(kvmppc_booke_handlers, VCPU_SIZE_ORDER); 1361 kvm_exit(); 1362 } 1363