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 */ 21 22 #include <linux/errno.h> 23 #include <linux/err.h> 24 #include <linux/kvm_host.h> 25 #include <linux/gfp.h> 26 #include <linux/module.h> 27 #include <linux/vmalloc.h> 28 #include <linux/fs.h> 29 30 #include <asm/cputable.h> 31 #include <asm/uaccess.h> 32 #include <asm/kvm_ppc.h> 33 #include "timing.h" 34 #include <asm/cacheflush.h> 35 36 #include "booke.h" 37 38 unsigned long kvmppc_booke_handlers; 39 40 #define VM_STAT(x) offsetof(struct kvm, stat.x), KVM_STAT_VM 41 #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU 42 43 struct kvm_stats_debugfs_item debugfs_entries[] = { 44 { "mmio", VCPU_STAT(mmio_exits) }, 45 { "dcr", VCPU_STAT(dcr_exits) }, 46 { "sig", VCPU_STAT(signal_exits) }, 47 { "itlb_r", VCPU_STAT(itlb_real_miss_exits) }, 48 { "itlb_v", VCPU_STAT(itlb_virt_miss_exits) }, 49 { "dtlb_r", VCPU_STAT(dtlb_real_miss_exits) }, 50 { "dtlb_v", VCPU_STAT(dtlb_virt_miss_exits) }, 51 { "sysc", VCPU_STAT(syscall_exits) }, 52 { "isi", VCPU_STAT(isi_exits) }, 53 { "dsi", VCPU_STAT(dsi_exits) }, 54 { "inst_emu", VCPU_STAT(emulated_inst_exits) }, 55 { "dec", VCPU_STAT(dec_exits) }, 56 { "ext_intr", VCPU_STAT(ext_intr_exits) }, 57 { "halt_wakeup", VCPU_STAT(halt_wakeup) }, 58 { NULL } 59 }; 60 61 /* TODO: use vcpu_printf() */ 62 void kvmppc_dump_vcpu(struct kvm_vcpu *vcpu) 63 { 64 int i; 65 66 printk("pc: %08lx msr: %08llx\n", vcpu->arch.pc, vcpu->arch.shared->msr); 67 printk("lr: %08lx ctr: %08lx\n", vcpu->arch.lr, vcpu->arch.ctr); 68 printk("srr0: %08llx srr1: %08llx\n", vcpu->arch.shared->srr0, 69 vcpu->arch.shared->srr1); 70 71 printk("exceptions: %08lx\n", vcpu->arch.pending_exceptions); 72 73 for (i = 0; i < 32; i += 4) { 74 printk("gpr%02d: %08lx %08lx %08lx %08lx\n", i, 75 kvmppc_get_gpr(vcpu, i), 76 kvmppc_get_gpr(vcpu, i+1), 77 kvmppc_get_gpr(vcpu, i+2), 78 kvmppc_get_gpr(vcpu, i+3)); 79 } 80 } 81 82 #ifdef CONFIG_SPE 83 void kvmppc_vcpu_disable_spe(struct kvm_vcpu *vcpu) 84 { 85 preempt_disable(); 86 enable_kernel_spe(); 87 kvmppc_save_guest_spe(vcpu); 88 vcpu->arch.shadow_msr &= ~MSR_SPE; 89 preempt_enable(); 90 } 91 92 static void kvmppc_vcpu_enable_spe(struct kvm_vcpu *vcpu) 93 { 94 preempt_disable(); 95 enable_kernel_spe(); 96 kvmppc_load_guest_spe(vcpu); 97 vcpu->arch.shadow_msr |= MSR_SPE; 98 preempt_enable(); 99 } 100 101 static void kvmppc_vcpu_sync_spe(struct kvm_vcpu *vcpu) 102 { 103 if (vcpu->arch.shared->msr & MSR_SPE) { 104 if (!(vcpu->arch.shadow_msr & MSR_SPE)) 105 kvmppc_vcpu_enable_spe(vcpu); 106 } else if (vcpu->arch.shadow_msr & MSR_SPE) { 107 kvmppc_vcpu_disable_spe(vcpu); 108 } 109 } 110 #else 111 static void kvmppc_vcpu_sync_spe(struct kvm_vcpu *vcpu) 112 { 113 } 114 #endif 115 116 /* 117 * Helper function for "full" MSR writes. No need to call this if only 118 * EE/CE/ME/DE/RI are changing. 119 */ 120 void kvmppc_set_msr(struct kvm_vcpu *vcpu, u32 new_msr) 121 { 122 u32 old_msr = vcpu->arch.shared->msr; 123 124 vcpu->arch.shared->msr = new_msr; 125 126 kvmppc_mmu_msr_notify(vcpu, old_msr); 127 128 if (vcpu->arch.shared->msr & MSR_WE) { 129 kvm_vcpu_block(vcpu); 130 kvmppc_set_exit_type(vcpu, EMULATED_MTMSRWE_EXITS); 131 }; 132 133 kvmppc_vcpu_sync_spe(vcpu); 134 } 135 136 static void kvmppc_booke_queue_irqprio(struct kvm_vcpu *vcpu, 137 unsigned int priority) 138 { 139 set_bit(priority, &vcpu->arch.pending_exceptions); 140 } 141 142 static void kvmppc_core_queue_dtlb_miss(struct kvm_vcpu *vcpu, 143 ulong dear_flags, ulong esr_flags) 144 { 145 vcpu->arch.queued_dear = dear_flags; 146 vcpu->arch.queued_esr = esr_flags; 147 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DTLB_MISS); 148 } 149 150 static void kvmppc_core_queue_data_storage(struct kvm_vcpu *vcpu, 151 ulong dear_flags, ulong esr_flags) 152 { 153 vcpu->arch.queued_dear = dear_flags; 154 vcpu->arch.queued_esr = esr_flags; 155 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DATA_STORAGE); 156 } 157 158 static void kvmppc_core_queue_inst_storage(struct kvm_vcpu *vcpu, 159 ulong esr_flags) 160 { 161 vcpu->arch.queued_esr = esr_flags; 162 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_INST_STORAGE); 163 } 164 165 void kvmppc_core_queue_program(struct kvm_vcpu *vcpu, ulong esr_flags) 166 { 167 vcpu->arch.queued_esr = esr_flags; 168 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_PROGRAM); 169 } 170 171 void kvmppc_core_queue_dec(struct kvm_vcpu *vcpu) 172 { 173 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DECREMENTER); 174 } 175 176 int kvmppc_core_pending_dec(struct kvm_vcpu *vcpu) 177 { 178 return test_bit(BOOKE_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions); 179 } 180 181 void kvmppc_core_dequeue_dec(struct kvm_vcpu *vcpu) 182 { 183 clear_bit(BOOKE_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions); 184 } 185 186 void kvmppc_core_queue_external(struct kvm_vcpu *vcpu, 187 struct kvm_interrupt *irq) 188 { 189 unsigned int prio = BOOKE_IRQPRIO_EXTERNAL; 190 191 if (irq->irq == KVM_INTERRUPT_SET_LEVEL) 192 prio = BOOKE_IRQPRIO_EXTERNAL_LEVEL; 193 194 kvmppc_booke_queue_irqprio(vcpu, prio); 195 } 196 197 void kvmppc_core_dequeue_external(struct kvm_vcpu *vcpu, 198 struct kvm_interrupt *irq) 199 { 200 clear_bit(BOOKE_IRQPRIO_EXTERNAL, &vcpu->arch.pending_exceptions); 201 clear_bit(BOOKE_IRQPRIO_EXTERNAL_LEVEL, &vcpu->arch.pending_exceptions); 202 } 203 204 /* Deliver the interrupt of the corresponding priority, if possible. */ 205 static int kvmppc_booke_irqprio_deliver(struct kvm_vcpu *vcpu, 206 unsigned int priority) 207 { 208 int allowed = 0; 209 ulong uninitialized_var(msr_mask); 210 bool update_esr = false, update_dear = false; 211 ulong crit_raw = vcpu->arch.shared->critical; 212 ulong crit_r1 = kvmppc_get_gpr(vcpu, 1); 213 bool crit; 214 bool keep_irq = false; 215 216 /* Truncate crit indicators in 32 bit mode */ 217 if (!(vcpu->arch.shared->msr & MSR_SF)) { 218 crit_raw &= 0xffffffff; 219 crit_r1 &= 0xffffffff; 220 } 221 222 /* Critical section when crit == r1 */ 223 crit = (crit_raw == crit_r1); 224 /* ... and we're in supervisor mode */ 225 crit = crit && !(vcpu->arch.shared->msr & MSR_PR); 226 227 if (priority == BOOKE_IRQPRIO_EXTERNAL_LEVEL) { 228 priority = BOOKE_IRQPRIO_EXTERNAL; 229 keep_irq = true; 230 } 231 232 switch (priority) { 233 case BOOKE_IRQPRIO_DTLB_MISS: 234 case BOOKE_IRQPRIO_DATA_STORAGE: 235 update_dear = true; 236 /* fall through */ 237 case BOOKE_IRQPRIO_INST_STORAGE: 238 case BOOKE_IRQPRIO_PROGRAM: 239 update_esr = true; 240 /* fall through */ 241 case BOOKE_IRQPRIO_ITLB_MISS: 242 case BOOKE_IRQPRIO_SYSCALL: 243 case BOOKE_IRQPRIO_FP_UNAVAIL: 244 case BOOKE_IRQPRIO_SPE_UNAVAIL: 245 case BOOKE_IRQPRIO_SPE_FP_DATA: 246 case BOOKE_IRQPRIO_SPE_FP_ROUND: 247 case BOOKE_IRQPRIO_AP_UNAVAIL: 248 case BOOKE_IRQPRIO_ALIGNMENT: 249 allowed = 1; 250 msr_mask = MSR_CE|MSR_ME|MSR_DE; 251 break; 252 case BOOKE_IRQPRIO_CRITICAL: 253 case BOOKE_IRQPRIO_WATCHDOG: 254 allowed = vcpu->arch.shared->msr & MSR_CE; 255 msr_mask = MSR_ME; 256 break; 257 case BOOKE_IRQPRIO_MACHINE_CHECK: 258 allowed = vcpu->arch.shared->msr & MSR_ME; 259 msr_mask = 0; 260 break; 261 case BOOKE_IRQPRIO_EXTERNAL: 262 case BOOKE_IRQPRIO_DECREMENTER: 263 case BOOKE_IRQPRIO_FIT: 264 allowed = vcpu->arch.shared->msr & MSR_EE; 265 allowed = allowed && !crit; 266 msr_mask = MSR_CE|MSR_ME|MSR_DE; 267 break; 268 case BOOKE_IRQPRIO_DEBUG: 269 allowed = vcpu->arch.shared->msr & MSR_DE; 270 msr_mask = MSR_ME; 271 break; 272 } 273 274 if (allowed) { 275 vcpu->arch.shared->srr0 = vcpu->arch.pc; 276 vcpu->arch.shared->srr1 = vcpu->arch.shared->msr; 277 vcpu->arch.pc = vcpu->arch.ivpr | vcpu->arch.ivor[priority]; 278 if (update_esr == true) 279 vcpu->arch.esr = vcpu->arch.queued_esr; 280 if (update_dear == true) 281 vcpu->arch.shared->dar = vcpu->arch.queued_dear; 282 kvmppc_set_msr(vcpu, vcpu->arch.shared->msr & msr_mask); 283 284 if (!keep_irq) 285 clear_bit(priority, &vcpu->arch.pending_exceptions); 286 } 287 288 return allowed; 289 } 290 291 /* Check pending exceptions and deliver one, if possible. */ 292 void kvmppc_core_deliver_interrupts(struct kvm_vcpu *vcpu) 293 { 294 unsigned long *pending = &vcpu->arch.pending_exceptions; 295 unsigned long old_pending = vcpu->arch.pending_exceptions; 296 unsigned int priority; 297 298 priority = __ffs(*pending); 299 while (priority <= BOOKE_IRQPRIO_MAX) { 300 if (kvmppc_booke_irqprio_deliver(vcpu, priority)) 301 break; 302 303 priority = find_next_bit(pending, 304 BITS_PER_BYTE * sizeof(*pending), 305 priority + 1); 306 } 307 308 /* Tell the guest about our interrupt status */ 309 if (*pending) 310 vcpu->arch.shared->int_pending = 1; 311 else if (old_pending) 312 vcpu->arch.shared->int_pending = 0; 313 } 314 315 int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu) 316 { 317 int ret; 318 319 if (!vcpu->arch.sane) { 320 kvm_run->exit_reason = KVM_EXIT_INTERNAL_ERROR; 321 return -EINVAL; 322 } 323 324 local_irq_disable(); 325 kvm_guest_enter(); 326 ret = __kvmppc_vcpu_run(kvm_run, vcpu); 327 kvm_guest_exit(); 328 local_irq_enable(); 329 330 return ret; 331 } 332 333 /** 334 * kvmppc_handle_exit 335 * 336 * Return value is in the form (errcode<<2 | RESUME_FLAG_HOST | RESUME_FLAG_NV) 337 */ 338 int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu, 339 unsigned int exit_nr) 340 { 341 enum emulation_result er; 342 int r = RESUME_HOST; 343 344 /* update before a new last_exit_type is rewritten */ 345 kvmppc_update_timing_stats(vcpu); 346 347 local_irq_enable(); 348 349 run->exit_reason = KVM_EXIT_UNKNOWN; 350 run->ready_for_interrupt_injection = 1; 351 352 switch (exit_nr) { 353 case BOOKE_INTERRUPT_MACHINE_CHECK: 354 printk("MACHINE CHECK: %lx\n", mfspr(SPRN_MCSR)); 355 kvmppc_dump_vcpu(vcpu); 356 r = RESUME_HOST; 357 break; 358 359 case BOOKE_INTERRUPT_EXTERNAL: 360 kvmppc_account_exit(vcpu, EXT_INTR_EXITS); 361 if (need_resched()) 362 cond_resched(); 363 r = RESUME_GUEST; 364 break; 365 366 case BOOKE_INTERRUPT_DECREMENTER: 367 /* Since we switched IVPR back to the host's value, the host 368 * handled this interrupt the moment we enabled interrupts. 369 * Now we just offer it a chance to reschedule the guest. */ 370 kvmppc_account_exit(vcpu, DEC_EXITS); 371 if (need_resched()) 372 cond_resched(); 373 r = RESUME_GUEST; 374 break; 375 376 case BOOKE_INTERRUPT_PROGRAM: 377 if (vcpu->arch.shared->msr & MSR_PR) { 378 /* Program traps generated by user-level software must be handled 379 * by the guest kernel. */ 380 kvmppc_core_queue_program(vcpu, vcpu->arch.fault_esr); 381 r = RESUME_GUEST; 382 kvmppc_account_exit(vcpu, USR_PR_INST); 383 break; 384 } 385 386 er = kvmppc_emulate_instruction(run, vcpu); 387 switch (er) { 388 case EMULATE_DONE: 389 /* don't overwrite subtypes, just account kvm_stats */ 390 kvmppc_account_exit_stat(vcpu, EMULATED_INST_EXITS); 391 /* Future optimization: only reload non-volatiles if 392 * they were actually modified by emulation. */ 393 r = RESUME_GUEST_NV; 394 break; 395 case EMULATE_DO_DCR: 396 run->exit_reason = KVM_EXIT_DCR; 397 r = RESUME_HOST; 398 break; 399 case EMULATE_FAIL: 400 /* XXX Deliver Program interrupt to guest. */ 401 printk(KERN_CRIT "%s: emulation at %lx failed (%08x)\n", 402 __func__, vcpu->arch.pc, vcpu->arch.last_inst); 403 /* For debugging, encode the failing instruction and 404 * report it to userspace. */ 405 run->hw.hardware_exit_reason = ~0ULL << 32; 406 run->hw.hardware_exit_reason |= vcpu->arch.last_inst; 407 r = RESUME_HOST; 408 break; 409 default: 410 BUG(); 411 } 412 break; 413 414 case BOOKE_INTERRUPT_FP_UNAVAIL: 415 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_FP_UNAVAIL); 416 kvmppc_account_exit(vcpu, FP_UNAVAIL); 417 r = RESUME_GUEST; 418 break; 419 420 #ifdef CONFIG_SPE 421 case BOOKE_INTERRUPT_SPE_UNAVAIL: { 422 if (vcpu->arch.shared->msr & MSR_SPE) 423 kvmppc_vcpu_enable_spe(vcpu); 424 else 425 kvmppc_booke_queue_irqprio(vcpu, 426 BOOKE_IRQPRIO_SPE_UNAVAIL); 427 r = RESUME_GUEST; 428 break; 429 } 430 431 case BOOKE_INTERRUPT_SPE_FP_DATA: 432 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SPE_FP_DATA); 433 r = RESUME_GUEST; 434 break; 435 436 case BOOKE_INTERRUPT_SPE_FP_ROUND: 437 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SPE_FP_ROUND); 438 r = RESUME_GUEST; 439 break; 440 #else 441 case BOOKE_INTERRUPT_SPE_UNAVAIL: 442 /* 443 * Guest wants SPE, but host kernel doesn't support it. Send 444 * an "unimplemented operation" program check to the guest. 445 */ 446 kvmppc_core_queue_program(vcpu, ESR_PUO | ESR_SPV); 447 r = RESUME_GUEST; 448 break; 449 450 /* 451 * These really should never happen without CONFIG_SPE, 452 * as we should never enable the real MSR[SPE] in the guest. 453 */ 454 case BOOKE_INTERRUPT_SPE_FP_DATA: 455 case BOOKE_INTERRUPT_SPE_FP_ROUND: 456 printk(KERN_CRIT "%s: unexpected SPE interrupt %u at %08lx\n", 457 __func__, exit_nr, vcpu->arch.pc); 458 run->hw.hardware_exit_reason = exit_nr; 459 r = RESUME_HOST; 460 break; 461 #endif 462 463 case BOOKE_INTERRUPT_DATA_STORAGE: 464 kvmppc_core_queue_data_storage(vcpu, vcpu->arch.fault_dear, 465 vcpu->arch.fault_esr); 466 kvmppc_account_exit(vcpu, DSI_EXITS); 467 r = RESUME_GUEST; 468 break; 469 470 case BOOKE_INTERRUPT_INST_STORAGE: 471 kvmppc_core_queue_inst_storage(vcpu, vcpu->arch.fault_esr); 472 kvmppc_account_exit(vcpu, ISI_EXITS); 473 r = RESUME_GUEST; 474 break; 475 476 case BOOKE_INTERRUPT_SYSCALL: 477 if (!(vcpu->arch.shared->msr & MSR_PR) && 478 (((u32)kvmppc_get_gpr(vcpu, 0)) == KVM_SC_MAGIC_R0)) { 479 /* KVM PV hypercalls */ 480 kvmppc_set_gpr(vcpu, 3, kvmppc_kvm_pv(vcpu)); 481 r = RESUME_GUEST; 482 } else { 483 /* Guest syscalls */ 484 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SYSCALL); 485 } 486 kvmppc_account_exit(vcpu, SYSCALL_EXITS); 487 r = RESUME_GUEST; 488 break; 489 490 case BOOKE_INTERRUPT_DTLB_MISS: { 491 unsigned long eaddr = vcpu->arch.fault_dear; 492 int gtlb_index; 493 gpa_t gpaddr; 494 gfn_t gfn; 495 496 #ifdef CONFIG_KVM_E500 497 if (!(vcpu->arch.shared->msr & MSR_PR) && 498 (eaddr & PAGE_MASK) == vcpu->arch.magic_page_ea) { 499 kvmppc_map_magic(vcpu); 500 kvmppc_account_exit(vcpu, DTLB_VIRT_MISS_EXITS); 501 r = RESUME_GUEST; 502 503 break; 504 } 505 #endif 506 507 /* Check the guest TLB. */ 508 gtlb_index = kvmppc_mmu_dtlb_index(vcpu, eaddr); 509 if (gtlb_index < 0) { 510 /* The guest didn't have a mapping for it. */ 511 kvmppc_core_queue_dtlb_miss(vcpu, 512 vcpu->arch.fault_dear, 513 vcpu->arch.fault_esr); 514 kvmppc_mmu_dtlb_miss(vcpu); 515 kvmppc_account_exit(vcpu, DTLB_REAL_MISS_EXITS); 516 r = RESUME_GUEST; 517 break; 518 } 519 520 gpaddr = kvmppc_mmu_xlate(vcpu, gtlb_index, eaddr); 521 gfn = gpaddr >> PAGE_SHIFT; 522 523 if (kvm_is_visible_gfn(vcpu->kvm, gfn)) { 524 /* The guest TLB had a mapping, but the shadow TLB 525 * didn't, and it is RAM. This could be because: 526 * a) the entry is mapping the host kernel, or 527 * b) the guest used a large mapping which we're faking 528 * Either way, we need to satisfy the fault without 529 * invoking the guest. */ 530 kvmppc_mmu_map(vcpu, eaddr, gpaddr, gtlb_index); 531 kvmppc_account_exit(vcpu, DTLB_VIRT_MISS_EXITS); 532 r = RESUME_GUEST; 533 } else { 534 /* Guest has mapped and accessed a page which is not 535 * actually RAM. */ 536 vcpu->arch.paddr_accessed = gpaddr; 537 r = kvmppc_emulate_mmio(run, vcpu); 538 kvmppc_account_exit(vcpu, MMIO_EXITS); 539 } 540 541 break; 542 } 543 544 case BOOKE_INTERRUPT_ITLB_MISS: { 545 unsigned long eaddr = vcpu->arch.pc; 546 gpa_t gpaddr; 547 gfn_t gfn; 548 int gtlb_index; 549 550 r = RESUME_GUEST; 551 552 /* Check the guest TLB. */ 553 gtlb_index = kvmppc_mmu_itlb_index(vcpu, eaddr); 554 if (gtlb_index < 0) { 555 /* The guest didn't have a mapping for it. */ 556 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ITLB_MISS); 557 kvmppc_mmu_itlb_miss(vcpu); 558 kvmppc_account_exit(vcpu, ITLB_REAL_MISS_EXITS); 559 break; 560 } 561 562 kvmppc_account_exit(vcpu, ITLB_VIRT_MISS_EXITS); 563 564 gpaddr = kvmppc_mmu_xlate(vcpu, gtlb_index, eaddr); 565 gfn = gpaddr >> PAGE_SHIFT; 566 567 if (kvm_is_visible_gfn(vcpu->kvm, gfn)) { 568 /* The guest TLB had a mapping, but the shadow TLB 569 * didn't. This could be because: 570 * a) the entry is mapping the host kernel, or 571 * b) the guest used a large mapping which we're faking 572 * Either way, we need to satisfy the fault without 573 * invoking the guest. */ 574 kvmppc_mmu_map(vcpu, eaddr, gpaddr, gtlb_index); 575 } else { 576 /* Guest mapped and leaped at non-RAM! */ 577 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_MACHINE_CHECK); 578 } 579 580 break; 581 } 582 583 case BOOKE_INTERRUPT_DEBUG: { 584 u32 dbsr; 585 586 vcpu->arch.pc = mfspr(SPRN_CSRR0); 587 588 /* clear IAC events in DBSR register */ 589 dbsr = mfspr(SPRN_DBSR); 590 dbsr &= DBSR_IAC1 | DBSR_IAC2 | DBSR_IAC3 | DBSR_IAC4; 591 mtspr(SPRN_DBSR, dbsr); 592 593 run->exit_reason = KVM_EXIT_DEBUG; 594 kvmppc_account_exit(vcpu, DEBUG_EXITS); 595 r = RESUME_HOST; 596 break; 597 } 598 599 default: 600 printk(KERN_EMERG "exit_nr %d\n", exit_nr); 601 BUG(); 602 } 603 604 local_irq_disable(); 605 606 kvmppc_core_deliver_interrupts(vcpu); 607 608 if (!(r & RESUME_HOST)) { 609 /* To avoid clobbering exit_reason, only check for signals if 610 * we aren't already exiting to userspace for some other 611 * reason. */ 612 if (signal_pending(current)) { 613 run->exit_reason = KVM_EXIT_INTR; 614 r = (-EINTR << 2) | RESUME_HOST | (r & RESUME_FLAG_NV); 615 kvmppc_account_exit(vcpu, SIGNAL_EXITS); 616 } 617 } 618 619 return r; 620 } 621 622 /* Initial guest state: 16MB mapping 0 -> 0, PC = 0, MSR = 0, R1 = 16MB */ 623 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) 624 { 625 int i; 626 int r; 627 628 vcpu->arch.pc = 0; 629 vcpu->arch.shared->msr = 0; 630 vcpu->arch.shadow_msr = MSR_USER | MSR_DE | MSR_IS | MSR_DS; 631 kvmppc_set_gpr(vcpu, 1, (16<<20) - 8); /* -8 for the callee-save LR slot */ 632 633 vcpu->arch.shadow_pid = 1; 634 635 /* Eye-catching numbers so we know if the guest takes an interrupt 636 * before it's programmed its own IVPR/IVORs. */ 637 vcpu->arch.ivpr = 0x55550000; 638 for (i = 0; i < BOOKE_IRQPRIO_MAX; i++) 639 vcpu->arch.ivor[i] = 0x7700 | i * 4; 640 641 kvmppc_init_timing_stats(vcpu); 642 643 r = kvmppc_core_vcpu_setup(vcpu); 644 kvmppc_sanity_check(vcpu); 645 return r; 646 } 647 648 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) 649 { 650 int i; 651 652 regs->pc = vcpu->arch.pc; 653 regs->cr = kvmppc_get_cr(vcpu); 654 regs->ctr = vcpu->arch.ctr; 655 regs->lr = vcpu->arch.lr; 656 regs->xer = kvmppc_get_xer(vcpu); 657 regs->msr = vcpu->arch.shared->msr; 658 regs->srr0 = vcpu->arch.shared->srr0; 659 regs->srr1 = vcpu->arch.shared->srr1; 660 regs->pid = vcpu->arch.pid; 661 regs->sprg0 = vcpu->arch.shared->sprg0; 662 regs->sprg1 = vcpu->arch.shared->sprg1; 663 regs->sprg2 = vcpu->arch.shared->sprg2; 664 regs->sprg3 = vcpu->arch.shared->sprg3; 665 regs->sprg4 = vcpu->arch.sprg4; 666 regs->sprg5 = vcpu->arch.sprg5; 667 regs->sprg6 = vcpu->arch.sprg6; 668 regs->sprg7 = vcpu->arch.sprg7; 669 670 for (i = 0; i < ARRAY_SIZE(regs->gpr); i++) 671 regs->gpr[i] = kvmppc_get_gpr(vcpu, i); 672 673 return 0; 674 } 675 676 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) 677 { 678 int i; 679 680 vcpu->arch.pc = regs->pc; 681 kvmppc_set_cr(vcpu, regs->cr); 682 vcpu->arch.ctr = regs->ctr; 683 vcpu->arch.lr = regs->lr; 684 kvmppc_set_xer(vcpu, regs->xer); 685 kvmppc_set_msr(vcpu, regs->msr); 686 vcpu->arch.shared->srr0 = regs->srr0; 687 vcpu->arch.shared->srr1 = regs->srr1; 688 kvmppc_set_pid(vcpu, regs->pid); 689 vcpu->arch.shared->sprg0 = regs->sprg0; 690 vcpu->arch.shared->sprg1 = regs->sprg1; 691 vcpu->arch.shared->sprg2 = regs->sprg2; 692 vcpu->arch.shared->sprg3 = regs->sprg3; 693 vcpu->arch.sprg4 = regs->sprg4; 694 vcpu->arch.sprg5 = regs->sprg5; 695 vcpu->arch.sprg6 = regs->sprg6; 696 vcpu->arch.sprg7 = regs->sprg7; 697 698 for (i = 0; i < ARRAY_SIZE(regs->gpr); i++) 699 kvmppc_set_gpr(vcpu, i, regs->gpr[i]); 700 701 return 0; 702 } 703 704 static void get_sregs_base(struct kvm_vcpu *vcpu, 705 struct kvm_sregs *sregs) 706 { 707 u64 tb = get_tb(); 708 709 sregs->u.e.features |= KVM_SREGS_E_BASE; 710 711 sregs->u.e.csrr0 = vcpu->arch.csrr0; 712 sregs->u.e.csrr1 = vcpu->arch.csrr1; 713 sregs->u.e.mcsr = vcpu->arch.mcsr; 714 sregs->u.e.esr = vcpu->arch.esr; 715 sregs->u.e.dear = vcpu->arch.shared->dar; 716 sregs->u.e.tsr = vcpu->arch.tsr; 717 sregs->u.e.tcr = vcpu->arch.tcr; 718 sregs->u.e.dec = kvmppc_get_dec(vcpu, tb); 719 sregs->u.e.tb = tb; 720 sregs->u.e.vrsave = vcpu->arch.vrsave; 721 } 722 723 static int set_sregs_base(struct kvm_vcpu *vcpu, 724 struct kvm_sregs *sregs) 725 { 726 if (!(sregs->u.e.features & KVM_SREGS_E_BASE)) 727 return 0; 728 729 vcpu->arch.csrr0 = sregs->u.e.csrr0; 730 vcpu->arch.csrr1 = sregs->u.e.csrr1; 731 vcpu->arch.mcsr = sregs->u.e.mcsr; 732 vcpu->arch.esr = sregs->u.e.esr; 733 vcpu->arch.shared->dar = sregs->u.e.dear; 734 vcpu->arch.vrsave = sregs->u.e.vrsave; 735 vcpu->arch.tcr = sregs->u.e.tcr; 736 737 if (sregs->u.e.update_special & KVM_SREGS_E_UPDATE_DEC) 738 vcpu->arch.dec = sregs->u.e.dec; 739 740 kvmppc_emulate_dec(vcpu); 741 742 if (sregs->u.e.update_special & KVM_SREGS_E_UPDATE_TSR) { 743 /* 744 * FIXME: existing KVM timer handling is incomplete. 745 * TSR cannot be read by the guest, and its value in 746 * vcpu->arch is always zero. For now, just handle 747 * the case where the caller is trying to inject a 748 * decrementer interrupt. 749 */ 750 751 if ((sregs->u.e.tsr & TSR_DIS) && 752 (vcpu->arch.tcr & TCR_DIE)) 753 kvmppc_core_queue_dec(vcpu); 754 } 755 756 return 0; 757 } 758 759 static void get_sregs_arch206(struct kvm_vcpu *vcpu, 760 struct kvm_sregs *sregs) 761 { 762 sregs->u.e.features |= KVM_SREGS_E_ARCH206; 763 764 sregs->u.e.pir = 0; 765 sregs->u.e.mcsrr0 = vcpu->arch.mcsrr0; 766 sregs->u.e.mcsrr1 = vcpu->arch.mcsrr1; 767 sregs->u.e.decar = vcpu->arch.decar; 768 sregs->u.e.ivpr = vcpu->arch.ivpr; 769 } 770 771 static int set_sregs_arch206(struct kvm_vcpu *vcpu, 772 struct kvm_sregs *sregs) 773 { 774 if (!(sregs->u.e.features & KVM_SREGS_E_ARCH206)) 775 return 0; 776 777 if (sregs->u.e.pir != 0) 778 return -EINVAL; 779 780 vcpu->arch.mcsrr0 = sregs->u.e.mcsrr0; 781 vcpu->arch.mcsrr1 = sregs->u.e.mcsrr1; 782 vcpu->arch.decar = sregs->u.e.decar; 783 vcpu->arch.ivpr = sregs->u.e.ivpr; 784 785 return 0; 786 } 787 788 void kvmppc_get_sregs_ivor(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs) 789 { 790 sregs->u.e.features |= KVM_SREGS_E_IVOR; 791 792 sregs->u.e.ivor_low[0] = vcpu->arch.ivor[BOOKE_IRQPRIO_CRITICAL]; 793 sregs->u.e.ivor_low[1] = vcpu->arch.ivor[BOOKE_IRQPRIO_MACHINE_CHECK]; 794 sregs->u.e.ivor_low[2] = vcpu->arch.ivor[BOOKE_IRQPRIO_DATA_STORAGE]; 795 sregs->u.e.ivor_low[3] = vcpu->arch.ivor[BOOKE_IRQPRIO_INST_STORAGE]; 796 sregs->u.e.ivor_low[4] = vcpu->arch.ivor[BOOKE_IRQPRIO_EXTERNAL]; 797 sregs->u.e.ivor_low[5] = vcpu->arch.ivor[BOOKE_IRQPRIO_ALIGNMENT]; 798 sregs->u.e.ivor_low[6] = vcpu->arch.ivor[BOOKE_IRQPRIO_PROGRAM]; 799 sregs->u.e.ivor_low[7] = vcpu->arch.ivor[BOOKE_IRQPRIO_FP_UNAVAIL]; 800 sregs->u.e.ivor_low[8] = vcpu->arch.ivor[BOOKE_IRQPRIO_SYSCALL]; 801 sregs->u.e.ivor_low[9] = vcpu->arch.ivor[BOOKE_IRQPRIO_AP_UNAVAIL]; 802 sregs->u.e.ivor_low[10] = vcpu->arch.ivor[BOOKE_IRQPRIO_DECREMENTER]; 803 sregs->u.e.ivor_low[11] = vcpu->arch.ivor[BOOKE_IRQPRIO_FIT]; 804 sregs->u.e.ivor_low[12] = vcpu->arch.ivor[BOOKE_IRQPRIO_WATCHDOG]; 805 sregs->u.e.ivor_low[13] = vcpu->arch.ivor[BOOKE_IRQPRIO_DTLB_MISS]; 806 sregs->u.e.ivor_low[14] = vcpu->arch.ivor[BOOKE_IRQPRIO_ITLB_MISS]; 807 sregs->u.e.ivor_low[15] = vcpu->arch.ivor[BOOKE_IRQPRIO_DEBUG]; 808 } 809 810 int kvmppc_set_sregs_ivor(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs) 811 { 812 if (!(sregs->u.e.features & KVM_SREGS_E_IVOR)) 813 return 0; 814 815 vcpu->arch.ivor[BOOKE_IRQPRIO_CRITICAL] = sregs->u.e.ivor_low[0]; 816 vcpu->arch.ivor[BOOKE_IRQPRIO_MACHINE_CHECK] = sregs->u.e.ivor_low[1]; 817 vcpu->arch.ivor[BOOKE_IRQPRIO_DATA_STORAGE] = sregs->u.e.ivor_low[2]; 818 vcpu->arch.ivor[BOOKE_IRQPRIO_INST_STORAGE] = sregs->u.e.ivor_low[3]; 819 vcpu->arch.ivor[BOOKE_IRQPRIO_EXTERNAL] = sregs->u.e.ivor_low[4]; 820 vcpu->arch.ivor[BOOKE_IRQPRIO_ALIGNMENT] = sregs->u.e.ivor_low[5]; 821 vcpu->arch.ivor[BOOKE_IRQPRIO_PROGRAM] = sregs->u.e.ivor_low[6]; 822 vcpu->arch.ivor[BOOKE_IRQPRIO_FP_UNAVAIL] = sregs->u.e.ivor_low[7]; 823 vcpu->arch.ivor[BOOKE_IRQPRIO_SYSCALL] = sregs->u.e.ivor_low[8]; 824 vcpu->arch.ivor[BOOKE_IRQPRIO_AP_UNAVAIL] = sregs->u.e.ivor_low[9]; 825 vcpu->arch.ivor[BOOKE_IRQPRIO_DECREMENTER] = sregs->u.e.ivor_low[10]; 826 vcpu->arch.ivor[BOOKE_IRQPRIO_FIT] = sregs->u.e.ivor_low[11]; 827 vcpu->arch.ivor[BOOKE_IRQPRIO_WATCHDOG] = sregs->u.e.ivor_low[12]; 828 vcpu->arch.ivor[BOOKE_IRQPRIO_DTLB_MISS] = sregs->u.e.ivor_low[13]; 829 vcpu->arch.ivor[BOOKE_IRQPRIO_ITLB_MISS] = sregs->u.e.ivor_low[14]; 830 vcpu->arch.ivor[BOOKE_IRQPRIO_DEBUG] = sregs->u.e.ivor_low[15]; 831 832 return 0; 833 } 834 835 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, 836 struct kvm_sregs *sregs) 837 { 838 sregs->pvr = vcpu->arch.pvr; 839 840 get_sregs_base(vcpu, sregs); 841 get_sregs_arch206(vcpu, sregs); 842 kvmppc_core_get_sregs(vcpu, sregs); 843 return 0; 844 } 845 846 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, 847 struct kvm_sregs *sregs) 848 { 849 int ret; 850 851 if (vcpu->arch.pvr != sregs->pvr) 852 return -EINVAL; 853 854 ret = set_sregs_base(vcpu, sregs); 855 if (ret < 0) 856 return ret; 857 858 ret = set_sregs_arch206(vcpu, sregs); 859 if (ret < 0) 860 return ret; 861 862 return kvmppc_core_set_sregs(vcpu, sregs); 863 } 864 865 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) 866 { 867 return -ENOTSUPP; 868 } 869 870 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) 871 { 872 return -ENOTSUPP; 873 } 874 875 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, 876 struct kvm_translation *tr) 877 { 878 int r; 879 880 r = kvmppc_core_vcpu_translate(vcpu, tr); 881 return r; 882 } 883 884 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log) 885 { 886 return -ENOTSUPP; 887 } 888 889 int kvmppc_core_prepare_memory_region(struct kvm *kvm, 890 struct kvm_userspace_memory_region *mem) 891 { 892 return 0; 893 } 894 895 void kvmppc_core_commit_memory_region(struct kvm *kvm, 896 struct kvm_userspace_memory_region *mem) 897 { 898 } 899 900 int kvmppc_core_init_vm(struct kvm *kvm) 901 { 902 return 0; 903 } 904 905 void kvmppc_core_destroy_vm(struct kvm *kvm) 906 { 907 } 908 909 int __init kvmppc_booke_init(void) 910 { 911 unsigned long ivor[16]; 912 unsigned long max_ivor = 0; 913 int i; 914 915 /* We install our own exception handlers by hijacking IVPR. IVPR must 916 * be 16-bit aligned, so we need a 64KB allocation. */ 917 kvmppc_booke_handlers = __get_free_pages(GFP_KERNEL | __GFP_ZERO, 918 VCPU_SIZE_ORDER); 919 if (!kvmppc_booke_handlers) 920 return -ENOMEM; 921 922 /* XXX make sure our handlers are smaller than Linux's */ 923 924 /* Copy our interrupt handlers to match host IVORs. That way we don't 925 * have to swap the IVORs on every guest/host transition. */ 926 ivor[0] = mfspr(SPRN_IVOR0); 927 ivor[1] = mfspr(SPRN_IVOR1); 928 ivor[2] = mfspr(SPRN_IVOR2); 929 ivor[3] = mfspr(SPRN_IVOR3); 930 ivor[4] = mfspr(SPRN_IVOR4); 931 ivor[5] = mfspr(SPRN_IVOR5); 932 ivor[6] = mfspr(SPRN_IVOR6); 933 ivor[7] = mfspr(SPRN_IVOR7); 934 ivor[8] = mfspr(SPRN_IVOR8); 935 ivor[9] = mfspr(SPRN_IVOR9); 936 ivor[10] = mfspr(SPRN_IVOR10); 937 ivor[11] = mfspr(SPRN_IVOR11); 938 ivor[12] = mfspr(SPRN_IVOR12); 939 ivor[13] = mfspr(SPRN_IVOR13); 940 ivor[14] = mfspr(SPRN_IVOR14); 941 ivor[15] = mfspr(SPRN_IVOR15); 942 943 for (i = 0; i < 16; i++) { 944 if (ivor[i] > max_ivor) 945 max_ivor = ivor[i]; 946 947 memcpy((void *)kvmppc_booke_handlers + ivor[i], 948 kvmppc_handlers_start + i * kvmppc_handler_len, 949 kvmppc_handler_len); 950 } 951 flush_icache_range(kvmppc_booke_handlers, 952 kvmppc_booke_handlers + max_ivor + kvmppc_handler_len); 953 954 return 0; 955 } 956 957 void __exit kvmppc_booke_exit(void) 958 { 959 free_pages(kvmppc_booke_handlers, VCPU_SIZE_ORDER); 960 kvm_exit(); 961 } 962