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 local_irq_disable(); 320 kvm_guest_enter(); 321 ret = __kvmppc_vcpu_run(kvm_run, vcpu); 322 kvm_guest_exit(); 323 local_irq_enable(); 324 325 return ret; 326 } 327 328 /** 329 * kvmppc_handle_exit 330 * 331 * Return value is in the form (errcode<<2 | RESUME_FLAG_HOST | RESUME_FLAG_NV) 332 */ 333 int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu, 334 unsigned int exit_nr) 335 { 336 enum emulation_result er; 337 int r = RESUME_HOST; 338 339 /* update before a new last_exit_type is rewritten */ 340 kvmppc_update_timing_stats(vcpu); 341 342 local_irq_enable(); 343 344 run->exit_reason = KVM_EXIT_UNKNOWN; 345 run->ready_for_interrupt_injection = 1; 346 347 switch (exit_nr) { 348 case BOOKE_INTERRUPT_MACHINE_CHECK: 349 printk("MACHINE CHECK: %lx\n", mfspr(SPRN_MCSR)); 350 kvmppc_dump_vcpu(vcpu); 351 r = RESUME_HOST; 352 break; 353 354 case BOOKE_INTERRUPT_EXTERNAL: 355 kvmppc_account_exit(vcpu, EXT_INTR_EXITS); 356 if (need_resched()) 357 cond_resched(); 358 r = RESUME_GUEST; 359 break; 360 361 case BOOKE_INTERRUPT_DECREMENTER: 362 /* Since we switched IVPR back to the host's value, the host 363 * handled this interrupt the moment we enabled interrupts. 364 * Now we just offer it a chance to reschedule the guest. */ 365 kvmppc_account_exit(vcpu, DEC_EXITS); 366 if (need_resched()) 367 cond_resched(); 368 r = RESUME_GUEST; 369 break; 370 371 case BOOKE_INTERRUPT_PROGRAM: 372 if (vcpu->arch.shared->msr & MSR_PR) { 373 /* Program traps generated by user-level software must be handled 374 * by the guest kernel. */ 375 kvmppc_core_queue_program(vcpu, vcpu->arch.fault_esr); 376 r = RESUME_GUEST; 377 kvmppc_account_exit(vcpu, USR_PR_INST); 378 break; 379 } 380 381 er = kvmppc_emulate_instruction(run, vcpu); 382 switch (er) { 383 case EMULATE_DONE: 384 /* don't overwrite subtypes, just account kvm_stats */ 385 kvmppc_account_exit_stat(vcpu, EMULATED_INST_EXITS); 386 /* Future optimization: only reload non-volatiles if 387 * they were actually modified by emulation. */ 388 r = RESUME_GUEST_NV; 389 break; 390 case EMULATE_DO_DCR: 391 run->exit_reason = KVM_EXIT_DCR; 392 r = RESUME_HOST; 393 break; 394 case EMULATE_FAIL: 395 /* XXX Deliver Program interrupt to guest. */ 396 printk(KERN_CRIT "%s: emulation at %lx failed (%08x)\n", 397 __func__, vcpu->arch.pc, vcpu->arch.last_inst); 398 /* For debugging, encode the failing instruction and 399 * report it to userspace. */ 400 run->hw.hardware_exit_reason = ~0ULL << 32; 401 run->hw.hardware_exit_reason |= vcpu->arch.last_inst; 402 r = RESUME_HOST; 403 break; 404 default: 405 BUG(); 406 } 407 break; 408 409 case BOOKE_INTERRUPT_FP_UNAVAIL: 410 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_FP_UNAVAIL); 411 kvmppc_account_exit(vcpu, FP_UNAVAIL); 412 r = RESUME_GUEST; 413 break; 414 415 #ifdef CONFIG_SPE 416 case BOOKE_INTERRUPT_SPE_UNAVAIL: { 417 if (vcpu->arch.shared->msr & MSR_SPE) 418 kvmppc_vcpu_enable_spe(vcpu); 419 else 420 kvmppc_booke_queue_irqprio(vcpu, 421 BOOKE_IRQPRIO_SPE_UNAVAIL); 422 r = RESUME_GUEST; 423 break; 424 } 425 426 case BOOKE_INTERRUPT_SPE_FP_DATA: 427 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SPE_FP_DATA); 428 r = RESUME_GUEST; 429 break; 430 431 case BOOKE_INTERRUPT_SPE_FP_ROUND: 432 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SPE_FP_ROUND); 433 r = RESUME_GUEST; 434 break; 435 #else 436 case BOOKE_INTERRUPT_SPE_UNAVAIL: 437 /* 438 * Guest wants SPE, but host kernel doesn't support it. Send 439 * an "unimplemented operation" program check to the guest. 440 */ 441 kvmppc_core_queue_program(vcpu, ESR_PUO | ESR_SPV); 442 r = RESUME_GUEST; 443 break; 444 445 /* 446 * These really should never happen without CONFIG_SPE, 447 * as we should never enable the real MSR[SPE] in the guest. 448 */ 449 case BOOKE_INTERRUPT_SPE_FP_DATA: 450 case BOOKE_INTERRUPT_SPE_FP_ROUND: 451 printk(KERN_CRIT "%s: unexpected SPE interrupt %u at %08lx\n", 452 __func__, exit_nr, vcpu->arch.pc); 453 run->hw.hardware_exit_reason = exit_nr; 454 r = RESUME_HOST; 455 break; 456 #endif 457 458 case BOOKE_INTERRUPT_DATA_STORAGE: 459 kvmppc_core_queue_data_storage(vcpu, vcpu->arch.fault_dear, 460 vcpu->arch.fault_esr); 461 kvmppc_account_exit(vcpu, DSI_EXITS); 462 r = RESUME_GUEST; 463 break; 464 465 case BOOKE_INTERRUPT_INST_STORAGE: 466 kvmppc_core_queue_inst_storage(vcpu, vcpu->arch.fault_esr); 467 kvmppc_account_exit(vcpu, ISI_EXITS); 468 r = RESUME_GUEST; 469 break; 470 471 case BOOKE_INTERRUPT_SYSCALL: 472 if (!(vcpu->arch.shared->msr & MSR_PR) && 473 (((u32)kvmppc_get_gpr(vcpu, 0)) == KVM_SC_MAGIC_R0)) { 474 /* KVM PV hypercalls */ 475 kvmppc_set_gpr(vcpu, 3, kvmppc_kvm_pv(vcpu)); 476 r = RESUME_GUEST; 477 } else { 478 /* Guest syscalls */ 479 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SYSCALL); 480 } 481 kvmppc_account_exit(vcpu, SYSCALL_EXITS); 482 r = RESUME_GUEST; 483 break; 484 485 case BOOKE_INTERRUPT_DTLB_MISS: { 486 unsigned long eaddr = vcpu->arch.fault_dear; 487 int gtlb_index; 488 gpa_t gpaddr; 489 gfn_t gfn; 490 491 #ifdef CONFIG_KVM_E500 492 if (!(vcpu->arch.shared->msr & MSR_PR) && 493 (eaddr & PAGE_MASK) == vcpu->arch.magic_page_ea) { 494 kvmppc_map_magic(vcpu); 495 kvmppc_account_exit(vcpu, DTLB_VIRT_MISS_EXITS); 496 r = RESUME_GUEST; 497 498 break; 499 } 500 #endif 501 502 /* Check the guest TLB. */ 503 gtlb_index = kvmppc_mmu_dtlb_index(vcpu, eaddr); 504 if (gtlb_index < 0) { 505 /* The guest didn't have a mapping for it. */ 506 kvmppc_core_queue_dtlb_miss(vcpu, 507 vcpu->arch.fault_dear, 508 vcpu->arch.fault_esr); 509 kvmppc_mmu_dtlb_miss(vcpu); 510 kvmppc_account_exit(vcpu, DTLB_REAL_MISS_EXITS); 511 r = RESUME_GUEST; 512 break; 513 } 514 515 gpaddr = kvmppc_mmu_xlate(vcpu, gtlb_index, eaddr); 516 gfn = gpaddr >> PAGE_SHIFT; 517 518 if (kvm_is_visible_gfn(vcpu->kvm, gfn)) { 519 /* The guest TLB had a mapping, but the shadow TLB 520 * didn't, and it is RAM. This could be because: 521 * a) the entry is mapping the host kernel, or 522 * b) the guest used a large mapping which we're faking 523 * Either way, we need to satisfy the fault without 524 * invoking the guest. */ 525 kvmppc_mmu_map(vcpu, eaddr, gpaddr, gtlb_index); 526 kvmppc_account_exit(vcpu, DTLB_VIRT_MISS_EXITS); 527 r = RESUME_GUEST; 528 } else { 529 /* Guest has mapped and accessed a page which is not 530 * actually RAM. */ 531 vcpu->arch.paddr_accessed = gpaddr; 532 r = kvmppc_emulate_mmio(run, vcpu); 533 kvmppc_account_exit(vcpu, MMIO_EXITS); 534 } 535 536 break; 537 } 538 539 case BOOKE_INTERRUPT_ITLB_MISS: { 540 unsigned long eaddr = vcpu->arch.pc; 541 gpa_t gpaddr; 542 gfn_t gfn; 543 int gtlb_index; 544 545 r = RESUME_GUEST; 546 547 /* Check the guest TLB. */ 548 gtlb_index = kvmppc_mmu_itlb_index(vcpu, eaddr); 549 if (gtlb_index < 0) { 550 /* The guest didn't have a mapping for it. */ 551 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ITLB_MISS); 552 kvmppc_mmu_itlb_miss(vcpu); 553 kvmppc_account_exit(vcpu, ITLB_REAL_MISS_EXITS); 554 break; 555 } 556 557 kvmppc_account_exit(vcpu, ITLB_VIRT_MISS_EXITS); 558 559 gpaddr = kvmppc_mmu_xlate(vcpu, gtlb_index, eaddr); 560 gfn = gpaddr >> PAGE_SHIFT; 561 562 if (kvm_is_visible_gfn(vcpu->kvm, gfn)) { 563 /* The guest TLB had a mapping, but the shadow TLB 564 * didn't. This could be because: 565 * a) the entry is mapping the host kernel, or 566 * b) the guest used a large mapping which we're faking 567 * Either way, we need to satisfy the fault without 568 * invoking the guest. */ 569 kvmppc_mmu_map(vcpu, eaddr, gpaddr, gtlb_index); 570 } else { 571 /* Guest mapped and leaped at non-RAM! */ 572 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_MACHINE_CHECK); 573 } 574 575 break; 576 } 577 578 case BOOKE_INTERRUPT_DEBUG: { 579 u32 dbsr; 580 581 vcpu->arch.pc = mfspr(SPRN_CSRR0); 582 583 /* clear IAC events in DBSR register */ 584 dbsr = mfspr(SPRN_DBSR); 585 dbsr &= DBSR_IAC1 | DBSR_IAC2 | DBSR_IAC3 | DBSR_IAC4; 586 mtspr(SPRN_DBSR, dbsr); 587 588 run->exit_reason = KVM_EXIT_DEBUG; 589 kvmppc_account_exit(vcpu, DEBUG_EXITS); 590 r = RESUME_HOST; 591 break; 592 } 593 594 default: 595 printk(KERN_EMERG "exit_nr %d\n", exit_nr); 596 BUG(); 597 } 598 599 local_irq_disable(); 600 601 kvmppc_core_deliver_interrupts(vcpu); 602 603 if (!(r & RESUME_HOST)) { 604 /* To avoid clobbering exit_reason, only check for signals if 605 * we aren't already exiting to userspace for some other 606 * reason. */ 607 if (signal_pending(current)) { 608 run->exit_reason = KVM_EXIT_INTR; 609 r = (-EINTR << 2) | RESUME_HOST | (r & RESUME_FLAG_NV); 610 kvmppc_account_exit(vcpu, SIGNAL_EXITS); 611 } 612 } 613 614 return r; 615 } 616 617 /* Initial guest state: 16MB mapping 0 -> 0, PC = 0, MSR = 0, R1 = 16MB */ 618 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) 619 { 620 int i; 621 622 vcpu->arch.pc = 0; 623 vcpu->arch.shared->msr = 0; 624 vcpu->arch.shadow_msr = MSR_USER | MSR_DE | MSR_IS | MSR_DS; 625 kvmppc_set_gpr(vcpu, 1, (16<<20) - 8); /* -8 for the callee-save LR slot */ 626 627 vcpu->arch.shadow_pid = 1; 628 629 /* Eye-catching numbers so we know if the guest takes an interrupt 630 * before it's programmed its own IVPR/IVORs. */ 631 vcpu->arch.ivpr = 0x55550000; 632 for (i = 0; i < BOOKE_IRQPRIO_MAX; i++) 633 vcpu->arch.ivor[i] = 0x7700 | i * 4; 634 635 kvmppc_init_timing_stats(vcpu); 636 637 return kvmppc_core_vcpu_setup(vcpu); 638 } 639 640 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) 641 { 642 int i; 643 644 regs->pc = vcpu->arch.pc; 645 regs->cr = kvmppc_get_cr(vcpu); 646 regs->ctr = vcpu->arch.ctr; 647 regs->lr = vcpu->arch.lr; 648 regs->xer = kvmppc_get_xer(vcpu); 649 regs->msr = vcpu->arch.shared->msr; 650 regs->srr0 = vcpu->arch.shared->srr0; 651 regs->srr1 = vcpu->arch.shared->srr1; 652 regs->pid = vcpu->arch.pid; 653 regs->sprg0 = vcpu->arch.shared->sprg0; 654 regs->sprg1 = vcpu->arch.shared->sprg1; 655 regs->sprg2 = vcpu->arch.shared->sprg2; 656 regs->sprg3 = vcpu->arch.shared->sprg3; 657 regs->sprg4 = vcpu->arch.sprg4; 658 regs->sprg5 = vcpu->arch.sprg5; 659 regs->sprg6 = vcpu->arch.sprg6; 660 regs->sprg7 = vcpu->arch.sprg7; 661 662 for (i = 0; i < ARRAY_SIZE(regs->gpr); i++) 663 regs->gpr[i] = kvmppc_get_gpr(vcpu, i); 664 665 return 0; 666 } 667 668 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) 669 { 670 int i; 671 672 vcpu->arch.pc = regs->pc; 673 kvmppc_set_cr(vcpu, regs->cr); 674 vcpu->arch.ctr = regs->ctr; 675 vcpu->arch.lr = regs->lr; 676 kvmppc_set_xer(vcpu, regs->xer); 677 kvmppc_set_msr(vcpu, regs->msr); 678 vcpu->arch.shared->srr0 = regs->srr0; 679 vcpu->arch.shared->srr1 = regs->srr1; 680 kvmppc_set_pid(vcpu, regs->pid); 681 vcpu->arch.shared->sprg0 = regs->sprg0; 682 vcpu->arch.shared->sprg1 = regs->sprg1; 683 vcpu->arch.shared->sprg2 = regs->sprg2; 684 vcpu->arch.shared->sprg3 = regs->sprg3; 685 vcpu->arch.sprg4 = regs->sprg4; 686 vcpu->arch.sprg5 = regs->sprg5; 687 vcpu->arch.sprg6 = regs->sprg6; 688 vcpu->arch.sprg7 = regs->sprg7; 689 690 for (i = 0; i < ARRAY_SIZE(regs->gpr); i++) 691 kvmppc_set_gpr(vcpu, i, regs->gpr[i]); 692 693 return 0; 694 } 695 696 static void get_sregs_base(struct kvm_vcpu *vcpu, 697 struct kvm_sregs *sregs) 698 { 699 u64 tb = get_tb(); 700 701 sregs->u.e.features |= KVM_SREGS_E_BASE; 702 703 sregs->u.e.csrr0 = vcpu->arch.csrr0; 704 sregs->u.e.csrr1 = vcpu->arch.csrr1; 705 sregs->u.e.mcsr = vcpu->arch.mcsr; 706 sregs->u.e.esr = vcpu->arch.esr; 707 sregs->u.e.dear = vcpu->arch.shared->dar; 708 sregs->u.e.tsr = vcpu->arch.tsr; 709 sregs->u.e.tcr = vcpu->arch.tcr; 710 sregs->u.e.dec = kvmppc_get_dec(vcpu, tb); 711 sregs->u.e.tb = tb; 712 sregs->u.e.vrsave = vcpu->arch.vrsave; 713 } 714 715 static int set_sregs_base(struct kvm_vcpu *vcpu, 716 struct kvm_sregs *sregs) 717 { 718 if (!(sregs->u.e.features & KVM_SREGS_E_BASE)) 719 return 0; 720 721 vcpu->arch.csrr0 = sregs->u.e.csrr0; 722 vcpu->arch.csrr1 = sregs->u.e.csrr1; 723 vcpu->arch.mcsr = sregs->u.e.mcsr; 724 vcpu->arch.esr = sregs->u.e.esr; 725 vcpu->arch.shared->dar = sregs->u.e.dear; 726 vcpu->arch.vrsave = sregs->u.e.vrsave; 727 vcpu->arch.tcr = sregs->u.e.tcr; 728 729 if (sregs->u.e.update_special & KVM_SREGS_E_UPDATE_DEC) 730 vcpu->arch.dec = sregs->u.e.dec; 731 732 kvmppc_emulate_dec(vcpu); 733 734 if (sregs->u.e.update_special & KVM_SREGS_E_UPDATE_TSR) { 735 /* 736 * FIXME: existing KVM timer handling is incomplete. 737 * TSR cannot be read by the guest, and its value in 738 * vcpu->arch is always zero. For now, just handle 739 * the case where the caller is trying to inject a 740 * decrementer interrupt. 741 */ 742 743 if ((sregs->u.e.tsr & TSR_DIS) && 744 (vcpu->arch.tcr & TCR_DIE)) 745 kvmppc_core_queue_dec(vcpu); 746 } 747 748 return 0; 749 } 750 751 static void get_sregs_arch206(struct kvm_vcpu *vcpu, 752 struct kvm_sregs *sregs) 753 { 754 sregs->u.e.features |= KVM_SREGS_E_ARCH206; 755 756 sregs->u.e.pir = 0; 757 sregs->u.e.mcsrr0 = vcpu->arch.mcsrr0; 758 sregs->u.e.mcsrr1 = vcpu->arch.mcsrr1; 759 sregs->u.e.decar = vcpu->arch.decar; 760 sregs->u.e.ivpr = vcpu->arch.ivpr; 761 } 762 763 static int set_sregs_arch206(struct kvm_vcpu *vcpu, 764 struct kvm_sregs *sregs) 765 { 766 if (!(sregs->u.e.features & KVM_SREGS_E_ARCH206)) 767 return 0; 768 769 if (sregs->u.e.pir != 0) 770 return -EINVAL; 771 772 vcpu->arch.mcsrr0 = sregs->u.e.mcsrr0; 773 vcpu->arch.mcsrr1 = sregs->u.e.mcsrr1; 774 vcpu->arch.decar = sregs->u.e.decar; 775 vcpu->arch.ivpr = sregs->u.e.ivpr; 776 777 return 0; 778 } 779 780 void kvmppc_get_sregs_ivor(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs) 781 { 782 sregs->u.e.features |= KVM_SREGS_E_IVOR; 783 784 sregs->u.e.ivor_low[0] = vcpu->arch.ivor[BOOKE_IRQPRIO_CRITICAL]; 785 sregs->u.e.ivor_low[1] = vcpu->arch.ivor[BOOKE_IRQPRIO_MACHINE_CHECK]; 786 sregs->u.e.ivor_low[2] = vcpu->arch.ivor[BOOKE_IRQPRIO_DATA_STORAGE]; 787 sregs->u.e.ivor_low[3] = vcpu->arch.ivor[BOOKE_IRQPRIO_INST_STORAGE]; 788 sregs->u.e.ivor_low[4] = vcpu->arch.ivor[BOOKE_IRQPRIO_EXTERNAL]; 789 sregs->u.e.ivor_low[5] = vcpu->arch.ivor[BOOKE_IRQPRIO_ALIGNMENT]; 790 sregs->u.e.ivor_low[6] = vcpu->arch.ivor[BOOKE_IRQPRIO_PROGRAM]; 791 sregs->u.e.ivor_low[7] = vcpu->arch.ivor[BOOKE_IRQPRIO_FP_UNAVAIL]; 792 sregs->u.e.ivor_low[8] = vcpu->arch.ivor[BOOKE_IRQPRIO_SYSCALL]; 793 sregs->u.e.ivor_low[9] = vcpu->arch.ivor[BOOKE_IRQPRIO_AP_UNAVAIL]; 794 sregs->u.e.ivor_low[10] = vcpu->arch.ivor[BOOKE_IRQPRIO_DECREMENTER]; 795 sregs->u.e.ivor_low[11] = vcpu->arch.ivor[BOOKE_IRQPRIO_FIT]; 796 sregs->u.e.ivor_low[12] = vcpu->arch.ivor[BOOKE_IRQPRIO_WATCHDOG]; 797 sregs->u.e.ivor_low[13] = vcpu->arch.ivor[BOOKE_IRQPRIO_DTLB_MISS]; 798 sregs->u.e.ivor_low[14] = vcpu->arch.ivor[BOOKE_IRQPRIO_ITLB_MISS]; 799 sregs->u.e.ivor_low[15] = vcpu->arch.ivor[BOOKE_IRQPRIO_DEBUG]; 800 } 801 802 int kvmppc_set_sregs_ivor(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs) 803 { 804 if (!(sregs->u.e.features & KVM_SREGS_E_IVOR)) 805 return 0; 806 807 vcpu->arch.ivor[BOOKE_IRQPRIO_CRITICAL] = sregs->u.e.ivor_low[0]; 808 vcpu->arch.ivor[BOOKE_IRQPRIO_MACHINE_CHECK] = sregs->u.e.ivor_low[1]; 809 vcpu->arch.ivor[BOOKE_IRQPRIO_DATA_STORAGE] = sregs->u.e.ivor_low[2]; 810 vcpu->arch.ivor[BOOKE_IRQPRIO_INST_STORAGE] = sregs->u.e.ivor_low[3]; 811 vcpu->arch.ivor[BOOKE_IRQPRIO_EXTERNAL] = sregs->u.e.ivor_low[4]; 812 vcpu->arch.ivor[BOOKE_IRQPRIO_ALIGNMENT] = sregs->u.e.ivor_low[5]; 813 vcpu->arch.ivor[BOOKE_IRQPRIO_PROGRAM] = sregs->u.e.ivor_low[6]; 814 vcpu->arch.ivor[BOOKE_IRQPRIO_FP_UNAVAIL] = sregs->u.e.ivor_low[7]; 815 vcpu->arch.ivor[BOOKE_IRQPRIO_SYSCALL] = sregs->u.e.ivor_low[8]; 816 vcpu->arch.ivor[BOOKE_IRQPRIO_AP_UNAVAIL] = sregs->u.e.ivor_low[9]; 817 vcpu->arch.ivor[BOOKE_IRQPRIO_DECREMENTER] = sregs->u.e.ivor_low[10]; 818 vcpu->arch.ivor[BOOKE_IRQPRIO_FIT] = sregs->u.e.ivor_low[11]; 819 vcpu->arch.ivor[BOOKE_IRQPRIO_WATCHDOG] = sregs->u.e.ivor_low[12]; 820 vcpu->arch.ivor[BOOKE_IRQPRIO_DTLB_MISS] = sregs->u.e.ivor_low[13]; 821 vcpu->arch.ivor[BOOKE_IRQPRIO_ITLB_MISS] = sregs->u.e.ivor_low[14]; 822 vcpu->arch.ivor[BOOKE_IRQPRIO_DEBUG] = sregs->u.e.ivor_low[15]; 823 824 return 0; 825 } 826 827 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, 828 struct kvm_sregs *sregs) 829 { 830 sregs->pvr = vcpu->arch.pvr; 831 832 get_sregs_base(vcpu, sregs); 833 get_sregs_arch206(vcpu, sregs); 834 kvmppc_core_get_sregs(vcpu, sregs); 835 return 0; 836 } 837 838 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, 839 struct kvm_sregs *sregs) 840 { 841 int ret; 842 843 if (vcpu->arch.pvr != sregs->pvr) 844 return -EINVAL; 845 846 ret = set_sregs_base(vcpu, sregs); 847 if (ret < 0) 848 return ret; 849 850 ret = set_sregs_arch206(vcpu, sregs); 851 if (ret < 0) 852 return ret; 853 854 return kvmppc_core_set_sregs(vcpu, sregs); 855 } 856 857 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) 858 { 859 return -ENOTSUPP; 860 } 861 862 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) 863 { 864 return -ENOTSUPP; 865 } 866 867 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, 868 struct kvm_translation *tr) 869 { 870 int r; 871 872 r = kvmppc_core_vcpu_translate(vcpu, tr); 873 return r; 874 } 875 876 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log) 877 { 878 return -ENOTSUPP; 879 } 880 881 int kvmppc_core_prepare_memory_region(struct kvm *kvm, 882 struct kvm_userspace_memory_region *mem) 883 { 884 return 0; 885 } 886 887 void kvmppc_core_commit_memory_region(struct kvm *kvm, 888 struct kvm_userspace_memory_region *mem) 889 { 890 } 891 892 int kvmppc_core_init_vm(struct kvm *kvm) 893 { 894 return 0; 895 } 896 897 void kvmppc_core_destroy_vm(struct kvm *kvm) 898 { 899 } 900 901 int __init kvmppc_booke_init(void) 902 { 903 unsigned long ivor[16]; 904 unsigned long max_ivor = 0; 905 int i; 906 907 /* We install our own exception handlers by hijacking IVPR. IVPR must 908 * be 16-bit aligned, so we need a 64KB allocation. */ 909 kvmppc_booke_handlers = __get_free_pages(GFP_KERNEL | __GFP_ZERO, 910 VCPU_SIZE_ORDER); 911 if (!kvmppc_booke_handlers) 912 return -ENOMEM; 913 914 /* XXX make sure our handlers are smaller than Linux's */ 915 916 /* Copy our interrupt handlers to match host IVORs. That way we don't 917 * have to swap the IVORs on every guest/host transition. */ 918 ivor[0] = mfspr(SPRN_IVOR0); 919 ivor[1] = mfspr(SPRN_IVOR1); 920 ivor[2] = mfspr(SPRN_IVOR2); 921 ivor[3] = mfspr(SPRN_IVOR3); 922 ivor[4] = mfspr(SPRN_IVOR4); 923 ivor[5] = mfspr(SPRN_IVOR5); 924 ivor[6] = mfspr(SPRN_IVOR6); 925 ivor[7] = mfspr(SPRN_IVOR7); 926 ivor[8] = mfspr(SPRN_IVOR8); 927 ivor[9] = mfspr(SPRN_IVOR9); 928 ivor[10] = mfspr(SPRN_IVOR10); 929 ivor[11] = mfspr(SPRN_IVOR11); 930 ivor[12] = mfspr(SPRN_IVOR12); 931 ivor[13] = mfspr(SPRN_IVOR13); 932 ivor[14] = mfspr(SPRN_IVOR14); 933 ivor[15] = mfspr(SPRN_IVOR15); 934 935 for (i = 0; i < 16; i++) { 936 if (ivor[i] > max_ivor) 937 max_ivor = ivor[i]; 938 939 memcpy((void *)kvmppc_booke_handlers + ivor[i], 940 kvmppc_handlers_start + i * kvmppc_handler_len, 941 kvmppc_handler_len); 942 } 943 flush_icache_range(kvmppc_booke_handlers, 944 kvmppc_booke_handlers + max_ivor + kvmppc_handler_len); 945 946 return 0; 947 } 948 949 void __exit kvmppc_booke_exit(void) 950 { 951 free_pages(kvmppc_booke_handlers, VCPU_SIZE_ORDER); 952 kvm_exit(); 953 } 954