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 * 17 * Authors: Hollis Blanchard <hollisb@us.ibm.com> 18 * Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com> 19 */ 20 21 #include <linux/errno.h> 22 #include <linux/err.h> 23 #include <linux/kvm_host.h> 24 #include <linux/gfp.h> 25 #include <linux/module.h> 26 #include <linux/vmalloc.h> 27 #include <linux/fs.h> 28 29 #include <asm/cputable.h> 30 #include <asm/uaccess.h> 31 #include <asm/kvm_ppc.h> 32 #include "timing.h" 33 #include <asm/cacheflush.h> 34 35 #include "booke.h" 36 37 unsigned long kvmppc_booke_handlers; 38 39 #define VM_STAT(x) offsetof(struct kvm, stat.x), KVM_STAT_VM 40 #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU 41 42 struct kvm_stats_debugfs_item debugfs_entries[] = { 43 { "mmio", VCPU_STAT(mmio_exits) }, 44 { "dcr", VCPU_STAT(dcr_exits) }, 45 { "sig", VCPU_STAT(signal_exits) }, 46 { "itlb_r", VCPU_STAT(itlb_real_miss_exits) }, 47 { "itlb_v", VCPU_STAT(itlb_virt_miss_exits) }, 48 { "dtlb_r", VCPU_STAT(dtlb_real_miss_exits) }, 49 { "dtlb_v", VCPU_STAT(dtlb_virt_miss_exits) }, 50 { "sysc", VCPU_STAT(syscall_exits) }, 51 { "isi", VCPU_STAT(isi_exits) }, 52 { "dsi", VCPU_STAT(dsi_exits) }, 53 { "inst_emu", VCPU_STAT(emulated_inst_exits) }, 54 { "dec", VCPU_STAT(dec_exits) }, 55 { "ext_intr", VCPU_STAT(ext_intr_exits) }, 56 { "halt_wakeup", VCPU_STAT(halt_wakeup) }, 57 { NULL } 58 }; 59 60 /* TODO: use vcpu_printf() */ 61 void kvmppc_dump_vcpu(struct kvm_vcpu *vcpu) 62 { 63 int i; 64 65 printk("pc: %08lx msr: %08lx\n", vcpu->arch.pc, vcpu->arch.msr); 66 printk("lr: %08lx ctr: %08lx\n", vcpu->arch.lr, vcpu->arch.ctr); 67 printk("srr0: %08lx srr1: %08lx\n", vcpu->arch.srr0, vcpu->arch.srr1); 68 69 printk("exceptions: %08lx\n", vcpu->arch.pending_exceptions); 70 71 for (i = 0; i < 32; i += 4) { 72 printk("gpr%02d: %08lx %08lx %08lx %08lx\n", i, 73 kvmppc_get_gpr(vcpu, i), 74 kvmppc_get_gpr(vcpu, i+1), 75 kvmppc_get_gpr(vcpu, i+2), 76 kvmppc_get_gpr(vcpu, i+3)); 77 } 78 } 79 80 static void kvmppc_booke_queue_irqprio(struct kvm_vcpu *vcpu, 81 unsigned int priority) 82 { 83 set_bit(priority, &vcpu->arch.pending_exceptions); 84 } 85 86 static void kvmppc_core_queue_dtlb_miss(struct kvm_vcpu *vcpu, 87 ulong dear_flags, ulong esr_flags) 88 { 89 vcpu->arch.queued_dear = dear_flags; 90 vcpu->arch.queued_esr = esr_flags; 91 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DTLB_MISS); 92 } 93 94 static void kvmppc_core_queue_data_storage(struct kvm_vcpu *vcpu, 95 ulong dear_flags, ulong esr_flags) 96 { 97 vcpu->arch.queued_dear = dear_flags; 98 vcpu->arch.queued_esr = esr_flags; 99 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DATA_STORAGE); 100 } 101 102 static void kvmppc_core_queue_inst_storage(struct kvm_vcpu *vcpu, 103 ulong esr_flags) 104 { 105 vcpu->arch.queued_esr = esr_flags; 106 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_INST_STORAGE); 107 } 108 109 void kvmppc_core_queue_program(struct kvm_vcpu *vcpu, ulong esr_flags) 110 { 111 vcpu->arch.queued_esr = esr_flags; 112 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_PROGRAM); 113 } 114 115 void kvmppc_core_queue_dec(struct kvm_vcpu *vcpu) 116 { 117 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DECREMENTER); 118 } 119 120 int kvmppc_core_pending_dec(struct kvm_vcpu *vcpu) 121 { 122 return test_bit(BOOKE_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions); 123 } 124 125 void kvmppc_core_dequeue_dec(struct kvm_vcpu *vcpu) 126 { 127 clear_bit(BOOKE_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions); 128 } 129 130 void kvmppc_core_queue_external(struct kvm_vcpu *vcpu, 131 struct kvm_interrupt *irq) 132 { 133 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_EXTERNAL); 134 } 135 136 void kvmppc_core_dequeue_external(struct kvm_vcpu *vcpu, 137 struct kvm_interrupt *irq) 138 { 139 clear_bit(BOOKE_IRQPRIO_EXTERNAL, &vcpu->arch.pending_exceptions); 140 } 141 142 /* Deliver the interrupt of the corresponding priority, if possible. */ 143 static int kvmppc_booke_irqprio_deliver(struct kvm_vcpu *vcpu, 144 unsigned int priority) 145 { 146 int allowed = 0; 147 ulong uninitialized_var(msr_mask); 148 bool update_esr = false, update_dear = false; 149 150 switch (priority) { 151 case BOOKE_IRQPRIO_DTLB_MISS: 152 case BOOKE_IRQPRIO_DATA_STORAGE: 153 update_dear = true; 154 /* fall through */ 155 case BOOKE_IRQPRIO_INST_STORAGE: 156 case BOOKE_IRQPRIO_PROGRAM: 157 update_esr = true; 158 /* fall through */ 159 case BOOKE_IRQPRIO_ITLB_MISS: 160 case BOOKE_IRQPRIO_SYSCALL: 161 case BOOKE_IRQPRIO_FP_UNAVAIL: 162 case BOOKE_IRQPRIO_SPE_UNAVAIL: 163 case BOOKE_IRQPRIO_SPE_FP_DATA: 164 case BOOKE_IRQPRIO_SPE_FP_ROUND: 165 case BOOKE_IRQPRIO_AP_UNAVAIL: 166 case BOOKE_IRQPRIO_ALIGNMENT: 167 allowed = 1; 168 msr_mask = MSR_CE|MSR_ME|MSR_DE; 169 break; 170 case BOOKE_IRQPRIO_CRITICAL: 171 case BOOKE_IRQPRIO_WATCHDOG: 172 allowed = vcpu->arch.msr & MSR_CE; 173 msr_mask = MSR_ME; 174 break; 175 case BOOKE_IRQPRIO_MACHINE_CHECK: 176 allowed = vcpu->arch.msr & MSR_ME; 177 msr_mask = 0; 178 break; 179 case BOOKE_IRQPRIO_EXTERNAL: 180 case BOOKE_IRQPRIO_DECREMENTER: 181 case BOOKE_IRQPRIO_FIT: 182 allowed = vcpu->arch.msr & MSR_EE; 183 msr_mask = MSR_CE|MSR_ME|MSR_DE; 184 break; 185 case BOOKE_IRQPRIO_DEBUG: 186 allowed = vcpu->arch.msr & MSR_DE; 187 msr_mask = MSR_ME; 188 break; 189 } 190 191 if (allowed) { 192 vcpu->arch.srr0 = vcpu->arch.pc; 193 vcpu->arch.srr1 = vcpu->arch.msr; 194 vcpu->arch.pc = vcpu->arch.ivpr | vcpu->arch.ivor[priority]; 195 if (update_esr == true) 196 vcpu->arch.esr = vcpu->arch.queued_esr; 197 if (update_dear == true) 198 vcpu->arch.dear = vcpu->arch.queued_dear; 199 kvmppc_set_msr(vcpu, vcpu->arch.msr & msr_mask); 200 201 clear_bit(priority, &vcpu->arch.pending_exceptions); 202 } 203 204 return allowed; 205 } 206 207 /* Check pending exceptions and deliver one, if possible. */ 208 void kvmppc_core_deliver_interrupts(struct kvm_vcpu *vcpu) 209 { 210 unsigned long *pending = &vcpu->arch.pending_exceptions; 211 unsigned int priority; 212 213 priority = __ffs(*pending); 214 while (priority <= BOOKE_IRQPRIO_MAX) { 215 if (kvmppc_booke_irqprio_deliver(vcpu, priority)) 216 break; 217 218 priority = find_next_bit(pending, 219 BITS_PER_BYTE * sizeof(*pending), 220 priority + 1); 221 } 222 } 223 224 /** 225 * kvmppc_handle_exit 226 * 227 * Return value is in the form (errcode<<2 | RESUME_FLAG_HOST | RESUME_FLAG_NV) 228 */ 229 int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu, 230 unsigned int exit_nr) 231 { 232 enum emulation_result er; 233 int r = RESUME_HOST; 234 235 /* update before a new last_exit_type is rewritten */ 236 kvmppc_update_timing_stats(vcpu); 237 238 local_irq_enable(); 239 240 run->exit_reason = KVM_EXIT_UNKNOWN; 241 run->ready_for_interrupt_injection = 1; 242 243 switch (exit_nr) { 244 case BOOKE_INTERRUPT_MACHINE_CHECK: 245 printk("MACHINE CHECK: %lx\n", mfspr(SPRN_MCSR)); 246 kvmppc_dump_vcpu(vcpu); 247 r = RESUME_HOST; 248 break; 249 250 case BOOKE_INTERRUPT_EXTERNAL: 251 kvmppc_account_exit(vcpu, EXT_INTR_EXITS); 252 if (need_resched()) 253 cond_resched(); 254 r = RESUME_GUEST; 255 break; 256 257 case BOOKE_INTERRUPT_DECREMENTER: 258 /* Since we switched IVPR back to the host's value, the host 259 * handled this interrupt the moment we enabled interrupts. 260 * Now we just offer it a chance to reschedule the guest. */ 261 kvmppc_account_exit(vcpu, DEC_EXITS); 262 if (need_resched()) 263 cond_resched(); 264 r = RESUME_GUEST; 265 break; 266 267 case BOOKE_INTERRUPT_PROGRAM: 268 if (vcpu->arch.msr & MSR_PR) { 269 /* Program traps generated by user-level software must be handled 270 * by the guest kernel. */ 271 kvmppc_core_queue_program(vcpu, vcpu->arch.fault_esr); 272 r = RESUME_GUEST; 273 kvmppc_account_exit(vcpu, USR_PR_INST); 274 break; 275 } 276 277 er = kvmppc_emulate_instruction(run, vcpu); 278 switch (er) { 279 case EMULATE_DONE: 280 /* don't overwrite subtypes, just account kvm_stats */ 281 kvmppc_account_exit_stat(vcpu, EMULATED_INST_EXITS); 282 /* Future optimization: only reload non-volatiles if 283 * they were actually modified by emulation. */ 284 r = RESUME_GUEST_NV; 285 break; 286 case EMULATE_DO_DCR: 287 run->exit_reason = KVM_EXIT_DCR; 288 r = RESUME_HOST; 289 break; 290 case EMULATE_FAIL: 291 /* XXX Deliver Program interrupt to guest. */ 292 printk(KERN_CRIT "%s: emulation at %lx failed (%08x)\n", 293 __func__, vcpu->arch.pc, vcpu->arch.last_inst); 294 /* For debugging, encode the failing instruction and 295 * report it to userspace. */ 296 run->hw.hardware_exit_reason = ~0ULL << 32; 297 run->hw.hardware_exit_reason |= vcpu->arch.last_inst; 298 r = RESUME_HOST; 299 break; 300 default: 301 BUG(); 302 } 303 break; 304 305 case BOOKE_INTERRUPT_FP_UNAVAIL: 306 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_FP_UNAVAIL); 307 kvmppc_account_exit(vcpu, FP_UNAVAIL); 308 r = RESUME_GUEST; 309 break; 310 311 case BOOKE_INTERRUPT_SPE_UNAVAIL: 312 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SPE_UNAVAIL); 313 r = RESUME_GUEST; 314 break; 315 316 case BOOKE_INTERRUPT_SPE_FP_DATA: 317 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SPE_FP_DATA); 318 r = RESUME_GUEST; 319 break; 320 321 case BOOKE_INTERRUPT_SPE_FP_ROUND: 322 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SPE_FP_ROUND); 323 r = RESUME_GUEST; 324 break; 325 326 case BOOKE_INTERRUPT_DATA_STORAGE: 327 kvmppc_core_queue_data_storage(vcpu, vcpu->arch.fault_dear, 328 vcpu->arch.fault_esr); 329 kvmppc_account_exit(vcpu, DSI_EXITS); 330 r = RESUME_GUEST; 331 break; 332 333 case BOOKE_INTERRUPT_INST_STORAGE: 334 kvmppc_core_queue_inst_storage(vcpu, vcpu->arch.fault_esr); 335 kvmppc_account_exit(vcpu, ISI_EXITS); 336 r = RESUME_GUEST; 337 break; 338 339 case BOOKE_INTERRUPT_SYSCALL: 340 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SYSCALL); 341 kvmppc_account_exit(vcpu, SYSCALL_EXITS); 342 r = RESUME_GUEST; 343 break; 344 345 case BOOKE_INTERRUPT_DTLB_MISS: { 346 unsigned long eaddr = vcpu->arch.fault_dear; 347 int gtlb_index; 348 gpa_t gpaddr; 349 gfn_t gfn; 350 351 /* Check the guest TLB. */ 352 gtlb_index = kvmppc_mmu_dtlb_index(vcpu, eaddr); 353 if (gtlb_index < 0) { 354 /* The guest didn't have a mapping for it. */ 355 kvmppc_core_queue_dtlb_miss(vcpu, 356 vcpu->arch.fault_dear, 357 vcpu->arch.fault_esr); 358 kvmppc_mmu_dtlb_miss(vcpu); 359 kvmppc_account_exit(vcpu, DTLB_REAL_MISS_EXITS); 360 r = RESUME_GUEST; 361 break; 362 } 363 364 gpaddr = kvmppc_mmu_xlate(vcpu, gtlb_index, eaddr); 365 gfn = gpaddr >> PAGE_SHIFT; 366 367 if (kvm_is_visible_gfn(vcpu->kvm, gfn)) { 368 /* The guest TLB had a mapping, but the shadow TLB 369 * didn't, and it is RAM. This could be because: 370 * a) the entry is mapping the host kernel, or 371 * b) the guest used a large mapping which we're faking 372 * Either way, we need to satisfy the fault without 373 * invoking the guest. */ 374 kvmppc_mmu_map(vcpu, eaddr, gpaddr, gtlb_index); 375 kvmppc_account_exit(vcpu, DTLB_VIRT_MISS_EXITS); 376 r = RESUME_GUEST; 377 } else { 378 /* Guest has mapped and accessed a page which is not 379 * actually RAM. */ 380 vcpu->arch.paddr_accessed = gpaddr; 381 r = kvmppc_emulate_mmio(run, vcpu); 382 kvmppc_account_exit(vcpu, MMIO_EXITS); 383 } 384 385 break; 386 } 387 388 case BOOKE_INTERRUPT_ITLB_MISS: { 389 unsigned long eaddr = vcpu->arch.pc; 390 gpa_t gpaddr; 391 gfn_t gfn; 392 int gtlb_index; 393 394 r = RESUME_GUEST; 395 396 /* Check the guest TLB. */ 397 gtlb_index = kvmppc_mmu_itlb_index(vcpu, eaddr); 398 if (gtlb_index < 0) { 399 /* The guest didn't have a mapping for it. */ 400 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ITLB_MISS); 401 kvmppc_mmu_itlb_miss(vcpu); 402 kvmppc_account_exit(vcpu, ITLB_REAL_MISS_EXITS); 403 break; 404 } 405 406 kvmppc_account_exit(vcpu, ITLB_VIRT_MISS_EXITS); 407 408 gpaddr = kvmppc_mmu_xlate(vcpu, gtlb_index, eaddr); 409 gfn = gpaddr >> PAGE_SHIFT; 410 411 if (kvm_is_visible_gfn(vcpu->kvm, gfn)) { 412 /* The guest TLB had a mapping, but the shadow TLB 413 * didn't. This could be because: 414 * a) the entry is mapping the host kernel, or 415 * b) the guest used a large mapping which we're faking 416 * Either way, we need to satisfy the fault without 417 * invoking the guest. */ 418 kvmppc_mmu_map(vcpu, eaddr, gpaddr, gtlb_index); 419 } else { 420 /* Guest mapped and leaped at non-RAM! */ 421 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_MACHINE_CHECK); 422 } 423 424 break; 425 } 426 427 case BOOKE_INTERRUPT_DEBUG: { 428 u32 dbsr; 429 430 vcpu->arch.pc = mfspr(SPRN_CSRR0); 431 432 /* clear IAC events in DBSR register */ 433 dbsr = mfspr(SPRN_DBSR); 434 dbsr &= DBSR_IAC1 | DBSR_IAC2 | DBSR_IAC3 | DBSR_IAC4; 435 mtspr(SPRN_DBSR, dbsr); 436 437 run->exit_reason = KVM_EXIT_DEBUG; 438 kvmppc_account_exit(vcpu, DEBUG_EXITS); 439 r = RESUME_HOST; 440 break; 441 } 442 443 default: 444 printk(KERN_EMERG "exit_nr %d\n", exit_nr); 445 BUG(); 446 } 447 448 local_irq_disable(); 449 450 kvmppc_core_deliver_interrupts(vcpu); 451 452 if (!(r & RESUME_HOST)) { 453 /* To avoid clobbering exit_reason, only check for signals if 454 * we aren't already exiting to userspace for some other 455 * reason. */ 456 if (signal_pending(current)) { 457 run->exit_reason = KVM_EXIT_INTR; 458 r = (-EINTR << 2) | RESUME_HOST | (r & RESUME_FLAG_NV); 459 kvmppc_account_exit(vcpu, SIGNAL_EXITS); 460 } 461 } 462 463 return r; 464 } 465 466 /* Initial guest state: 16MB mapping 0 -> 0, PC = 0, MSR = 0, R1 = 16MB */ 467 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) 468 { 469 vcpu->arch.pc = 0; 470 vcpu->arch.msr = 0; 471 kvmppc_set_gpr(vcpu, 1, (16<<20) - 8); /* -8 for the callee-save LR slot */ 472 473 vcpu->arch.shadow_pid = 1; 474 475 /* Eye-catching number so we know if the guest takes an interrupt 476 * before it's programmed its own IVPR. */ 477 vcpu->arch.ivpr = 0x55550000; 478 479 kvmppc_init_timing_stats(vcpu); 480 481 return kvmppc_core_vcpu_setup(vcpu); 482 } 483 484 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) 485 { 486 int i; 487 488 regs->pc = vcpu->arch.pc; 489 regs->cr = kvmppc_get_cr(vcpu); 490 regs->ctr = vcpu->arch.ctr; 491 regs->lr = vcpu->arch.lr; 492 regs->xer = kvmppc_get_xer(vcpu); 493 regs->msr = vcpu->arch.msr; 494 regs->srr0 = vcpu->arch.srr0; 495 regs->srr1 = vcpu->arch.srr1; 496 regs->pid = vcpu->arch.pid; 497 regs->sprg0 = vcpu->arch.sprg0; 498 regs->sprg1 = vcpu->arch.sprg1; 499 regs->sprg2 = vcpu->arch.sprg2; 500 regs->sprg3 = vcpu->arch.sprg3; 501 regs->sprg5 = vcpu->arch.sprg4; 502 regs->sprg6 = vcpu->arch.sprg5; 503 regs->sprg7 = vcpu->arch.sprg6; 504 505 for (i = 0; i < ARRAY_SIZE(regs->gpr); i++) 506 regs->gpr[i] = kvmppc_get_gpr(vcpu, i); 507 508 return 0; 509 } 510 511 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) 512 { 513 int i; 514 515 vcpu->arch.pc = regs->pc; 516 kvmppc_set_cr(vcpu, regs->cr); 517 vcpu->arch.ctr = regs->ctr; 518 vcpu->arch.lr = regs->lr; 519 kvmppc_set_xer(vcpu, regs->xer); 520 kvmppc_set_msr(vcpu, regs->msr); 521 vcpu->arch.srr0 = regs->srr0; 522 vcpu->arch.srr1 = regs->srr1; 523 vcpu->arch.sprg0 = regs->sprg0; 524 vcpu->arch.sprg1 = regs->sprg1; 525 vcpu->arch.sprg2 = regs->sprg2; 526 vcpu->arch.sprg3 = regs->sprg3; 527 vcpu->arch.sprg5 = regs->sprg4; 528 vcpu->arch.sprg6 = regs->sprg5; 529 vcpu->arch.sprg7 = regs->sprg6; 530 531 for (i = 0; i < ARRAY_SIZE(regs->gpr); i++) 532 kvmppc_set_gpr(vcpu, i, regs->gpr[i]); 533 534 return 0; 535 } 536 537 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, 538 struct kvm_sregs *sregs) 539 { 540 return -ENOTSUPP; 541 } 542 543 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, 544 struct kvm_sregs *sregs) 545 { 546 return -ENOTSUPP; 547 } 548 549 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) 550 { 551 return -ENOTSUPP; 552 } 553 554 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) 555 { 556 return -ENOTSUPP; 557 } 558 559 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, 560 struct kvm_translation *tr) 561 { 562 int r; 563 564 r = kvmppc_core_vcpu_translate(vcpu, tr); 565 return r; 566 } 567 568 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log) 569 { 570 return -ENOTSUPP; 571 } 572 573 int __init kvmppc_booke_init(void) 574 { 575 unsigned long ivor[16]; 576 unsigned long max_ivor = 0; 577 int i; 578 579 /* We install our own exception handlers by hijacking IVPR. IVPR must 580 * be 16-bit aligned, so we need a 64KB allocation. */ 581 kvmppc_booke_handlers = __get_free_pages(GFP_KERNEL | __GFP_ZERO, 582 VCPU_SIZE_ORDER); 583 if (!kvmppc_booke_handlers) 584 return -ENOMEM; 585 586 /* XXX make sure our handlers are smaller than Linux's */ 587 588 /* Copy our interrupt handlers to match host IVORs. That way we don't 589 * have to swap the IVORs on every guest/host transition. */ 590 ivor[0] = mfspr(SPRN_IVOR0); 591 ivor[1] = mfspr(SPRN_IVOR1); 592 ivor[2] = mfspr(SPRN_IVOR2); 593 ivor[3] = mfspr(SPRN_IVOR3); 594 ivor[4] = mfspr(SPRN_IVOR4); 595 ivor[5] = mfspr(SPRN_IVOR5); 596 ivor[6] = mfspr(SPRN_IVOR6); 597 ivor[7] = mfspr(SPRN_IVOR7); 598 ivor[8] = mfspr(SPRN_IVOR8); 599 ivor[9] = mfspr(SPRN_IVOR9); 600 ivor[10] = mfspr(SPRN_IVOR10); 601 ivor[11] = mfspr(SPRN_IVOR11); 602 ivor[12] = mfspr(SPRN_IVOR12); 603 ivor[13] = mfspr(SPRN_IVOR13); 604 ivor[14] = mfspr(SPRN_IVOR14); 605 ivor[15] = mfspr(SPRN_IVOR15); 606 607 for (i = 0; i < 16; i++) { 608 if (ivor[i] > max_ivor) 609 max_ivor = ivor[i]; 610 611 memcpy((void *)kvmppc_booke_handlers + ivor[i], 612 kvmppc_handlers_start + i * kvmppc_handler_len, 613 kvmppc_handler_len); 614 } 615 flush_icache_range(kvmppc_booke_handlers, 616 kvmppc_booke_handlers + max_ivor + kvmppc_handler_len); 617 618 return 0; 619 } 620 621 void __exit kvmppc_booke_exit(void) 622 { 623 free_pages(kvmppc_booke_handlers, VCPU_SIZE_ORDER); 624 kvm_exit(); 625 } 626