1 /* 2 * Copyright (C) 2009. SUSE Linux Products GmbH. All rights reserved. 3 * 4 * Authors: 5 * Alexander Graf <agraf@suse.de> 6 * Kevin Wolf <mail@kevin-wolf.de> 7 * 8 * Description: 9 * This file is derived from arch/powerpc/kvm/44x.c, 10 * by Hollis Blanchard <hollisb@us.ibm.com>. 11 * 12 * This program is free software; you can redistribute it and/or modify 13 * it under the terms of the GNU General Public License, version 2, as 14 * published by the Free Software Foundation. 15 */ 16 17 #include <linux/kvm_host.h> 18 #include <linux/err.h> 19 #include <linux/slab.h> 20 21 #include <asm/reg.h> 22 #include <asm/cputable.h> 23 #include <asm/cacheflush.h> 24 #include <asm/tlbflush.h> 25 #include <asm/uaccess.h> 26 #include <asm/io.h> 27 #include <asm/kvm_ppc.h> 28 #include <asm/kvm_book3s.h> 29 #include <asm/mmu_context.h> 30 #include <linux/gfp.h> 31 #include <linux/sched.h> 32 #include <linux/vmalloc.h> 33 #include <linux/highmem.h> 34 35 #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU 36 37 /* #define EXIT_DEBUG */ 38 /* #define EXIT_DEBUG_SIMPLE */ 39 /* #define DEBUG_EXT */ 40 41 static int kvmppc_handle_ext(struct kvm_vcpu *vcpu, unsigned int exit_nr, 42 ulong msr); 43 44 /* Some compatibility defines */ 45 #ifdef CONFIG_PPC_BOOK3S_32 46 #define MSR_USER32 MSR_USER 47 #define MSR_USER64 MSR_USER 48 #define HW_PAGE_SIZE PAGE_SIZE 49 #endif 50 51 struct kvm_stats_debugfs_item debugfs_entries[] = { 52 { "exits", VCPU_STAT(sum_exits) }, 53 { "mmio", VCPU_STAT(mmio_exits) }, 54 { "sig", VCPU_STAT(signal_exits) }, 55 { "sysc", VCPU_STAT(syscall_exits) }, 56 { "inst_emu", VCPU_STAT(emulated_inst_exits) }, 57 { "dec", VCPU_STAT(dec_exits) }, 58 { "ext_intr", VCPU_STAT(ext_intr_exits) }, 59 { "queue_intr", VCPU_STAT(queue_intr) }, 60 { "halt_wakeup", VCPU_STAT(halt_wakeup) }, 61 { "pf_storage", VCPU_STAT(pf_storage) }, 62 { "sp_storage", VCPU_STAT(sp_storage) }, 63 { "pf_instruc", VCPU_STAT(pf_instruc) }, 64 { "sp_instruc", VCPU_STAT(sp_instruc) }, 65 { "ld", VCPU_STAT(ld) }, 66 { "ld_slow", VCPU_STAT(ld_slow) }, 67 { "st", VCPU_STAT(st) }, 68 { "st_slow", VCPU_STAT(st_slow) }, 69 { NULL } 70 }; 71 72 void kvmppc_core_load_host_debugstate(struct kvm_vcpu *vcpu) 73 { 74 } 75 76 void kvmppc_core_load_guest_debugstate(struct kvm_vcpu *vcpu) 77 { 78 } 79 80 void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu) 81 { 82 #ifdef CONFIG_PPC_BOOK3S_64 83 memcpy(to_svcpu(vcpu)->slb, to_book3s(vcpu)->slb_shadow, sizeof(to_svcpu(vcpu)->slb)); 84 memcpy(&get_paca()->shadow_vcpu, to_book3s(vcpu)->shadow_vcpu, 85 sizeof(get_paca()->shadow_vcpu)); 86 to_svcpu(vcpu)->slb_max = to_book3s(vcpu)->slb_shadow_max; 87 #endif 88 89 #ifdef CONFIG_PPC_BOOK3S_32 90 current->thread.kvm_shadow_vcpu = to_book3s(vcpu)->shadow_vcpu; 91 #endif 92 } 93 94 void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu) 95 { 96 #ifdef CONFIG_PPC_BOOK3S_64 97 memcpy(to_book3s(vcpu)->slb_shadow, to_svcpu(vcpu)->slb, sizeof(to_svcpu(vcpu)->slb)); 98 memcpy(to_book3s(vcpu)->shadow_vcpu, &get_paca()->shadow_vcpu, 99 sizeof(get_paca()->shadow_vcpu)); 100 to_book3s(vcpu)->slb_shadow_max = to_svcpu(vcpu)->slb_max; 101 #endif 102 103 kvmppc_giveup_ext(vcpu, MSR_FP); 104 kvmppc_giveup_ext(vcpu, MSR_VEC); 105 kvmppc_giveup_ext(vcpu, MSR_VSX); 106 } 107 108 #if defined(EXIT_DEBUG) 109 static u32 kvmppc_get_dec(struct kvm_vcpu *vcpu) 110 { 111 u64 jd = mftb() - vcpu->arch.dec_jiffies; 112 return vcpu->arch.dec - jd; 113 } 114 #endif 115 116 static void kvmppc_recalc_shadow_msr(struct kvm_vcpu *vcpu) 117 { 118 vcpu->arch.shadow_msr = vcpu->arch.msr; 119 /* Guest MSR values */ 120 vcpu->arch.shadow_msr &= MSR_FE0 | MSR_FE1 | MSR_SF | MSR_SE | 121 MSR_BE | MSR_DE; 122 /* Process MSR values */ 123 vcpu->arch.shadow_msr |= MSR_ME | MSR_RI | MSR_IR | MSR_DR | MSR_PR | 124 MSR_EE; 125 /* External providers the guest reserved */ 126 vcpu->arch.shadow_msr |= (vcpu->arch.msr & vcpu->arch.guest_owned_ext); 127 /* 64-bit Process MSR values */ 128 #ifdef CONFIG_PPC_BOOK3S_64 129 vcpu->arch.shadow_msr |= MSR_ISF | MSR_HV; 130 #endif 131 } 132 133 void kvmppc_set_msr(struct kvm_vcpu *vcpu, u64 msr) 134 { 135 ulong old_msr = vcpu->arch.msr; 136 137 #ifdef EXIT_DEBUG 138 printk(KERN_INFO "KVM: Set MSR to 0x%llx\n", msr); 139 #endif 140 141 msr &= to_book3s(vcpu)->msr_mask; 142 vcpu->arch.msr = msr; 143 kvmppc_recalc_shadow_msr(vcpu); 144 145 if (msr & (MSR_WE|MSR_POW)) { 146 if (!vcpu->arch.pending_exceptions) { 147 kvm_vcpu_block(vcpu); 148 vcpu->stat.halt_wakeup++; 149 } 150 } 151 152 if ((vcpu->arch.msr & (MSR_PR|MSR_IR|MSR_DR)) != 153 (old_msr & (MSR_PR|MSR_IR|MSR_DR))) { 154 kvmppc_mmu_flush_segments(vcpu); 155 kvmppc_mmu_map_segment(vcpu, kvmppc_get_pc(vcpu)); 156 } 157 158 /* Preload FPU if it's enabled */ 159 if (vcpu->arch.msr & MSR_FP) 160 kvmppc_handle_ext(vcpu, BOOK3S_INTERRUPT_FP_UNAVAIL, MSR_FP); 161 } 162 163 void kvmppc_inject_interrupt(struct kvm_vcpu *vcpu, int vec, u64 flags) 164 { 165 vcpu->arch.srr0 = kvmppc_get_pc(vcpu); 166 vcpu->arch.srr1 = vcpu->arch.msr | flags; 167 kvmppc_set_pc(vcpu, to_book3s(vcpu)->hior + vec); 168 vcpu->arch.mmu.reset_msr(vcpu); 169 } 170 171 static int kvmppc_book3s_vec2irqprio(unsigned int vec) 172 { 173 unsigned int prio; 174 175 switch (vec) { 176 case 0x100: prio = BOOK3S_IRQPRIO_SYSTEM_RESET; break; 177 case 0x200: prio = BOOK3S_IRQPRIO_MACHINE_CHECK; break; 178 case 0x300: prio = BOOK3S_IRQPRIO_DATA_STORAGE; break; 179 case 0x380: prio = BOOK3S_IRQPRIO_DATA_SEGMENT; break; 180 case 0x400: prio = BOOK3S_IRQPRIO_INST_STORAGE; break; 181 case 0x480: prio = BOOK3S_IRQPRIO_INST_SEGMENT; break; 182 case 0x500: prio = BOOK3S_IRQPRIO_EXTERNAL; break; 183 case 0x600: prio = BOOK3S_IRQPRIO_ALIGNMENT; break; 184 case 0x700: prio = BOOK3S_IRQPRIO_PROGRAM; break; 185 case 0x800: prio = BOOK3S_IRQPRIO_FP_UNAVAIL; break; 186 case 0x900: prio = BOOK3S_IRQPRIO_DECREMENTER; break; 187 case 0xc00: prio = BOOK3S_IRQPRIO_SYSCALL; break; 188 case 0xd00: prio = BOOK3S_IRQPRIO_DEBUG; break; 189 case 0xf20: prio = BOOK3S_IRQPRIO_ALTIVEC; break; 190 case 0xf40: prio = BOOK3S_IRQPRIO_VSX; break; 191 default: prio = BOOK3S_IRQPRIO_MAX; break; 192 } 193 194 return prio; 195 } 196 197 static void kvmppc_book3s_dequeue_irqprio(struct kvm_vcpu *vcpu, 198 unsigned int vec) 199 { 200 clear_bit(kvmppc_book3s_vec2irqprio(vec), 201 &vcpu->arch.pending_exceptions); 202 } 203 204 void kvmppc_book3s_queue_irqprio(struct kvm_vcpu *vcpu, unsigned int vec) 205 { 206 vcpu->stat.queue_intr++; 207 208 set_bit(kvmppc_book3s_vec2irqprio(vec), 209 &vcpu->arch.pending_exceptions); 210 #ifdef EXIT_DEBUG 211 printk(KERN_INFO "Queueing interrupt %x\n", vec); 212 #endif 213 } 214 215 216 void kvmppc_core_queue_program(struct kvm_vcpu *vcpu, ulong flags) 217 { 218 to_book3s(vcpu)->prog_flags = flags; 219 kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_PROGRAM); 220 } 221 222 void kvmppc_core_queue_dec(struct kvm_vcpu *vcpu) 223 { 224 kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_DECREMENTER); 225 } 226 227 int kvmppc_core_pending_dec(struct kvm_vcpu *vcpu) 228 { 229 return test_bit(BOOK3S_INTERRUPT_DECREMENTER >> 7, &vcpu->arch.pending_exceptions); 230 } 231 232 void kvmppc_core_dequeue_dec(struct kvm_vcpu *vcpu) 233 { 234 kvmppc_book3s_dequeue_irqprio(vcpu, BOOK3S_INTERRUPT_DECREMENTER); 235 } 236 237 void kvmppc_core_queue_external(struct kvm_vcpu *vcpu, 238 struct kvm_interrupt *irq) 239 { 240 kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_EXTERNAL); 241 } 242 243 void kvmppc_core_dequeue_external(struct kvm_vcpu *vcpu, 244 struct kvm_interrupt *irq) 245 { 246 kvmppc_book3s_dequeue_irqprio(vcpu, BOOK3S_INTERRUPT_EXTERNAL); 247 } 248 249 int kvmppc_book3s_irqprio_deliver(struct kvm_vcpu *vcpu, unsigned int priority) 250 { 251 int deliver = 1; 252 int vec = 0; 253 ulong flags = 0ULL; 254 255 switch (priority) { 256 case BOOK3S_IRQPRIO_DECREMENTER: 257 deliver = vcpu->arch.msr & MSR_EE; 258 vec = BOOK3S_INTERRUPT_DECREMENTER; 259 break; 260 case BOOK3S_IRQPRIO_EXTERNAL: 261 deliver = vcpu->arch.msr & MSR_EE; 262 vec = BOOK3S_INTERRUPT_EXTERNAL; 263 break; 264 case BOOK3S_IRQPRIO_SYSTEM_RESET: 265 vec = BOOK3S_INTERRUPT_SYSTEM_RESET; 266 break; 267 case BOOK3S_IRQPRIO_MACHINE_CHECK: 268 vec = BOOK3S_INTERRUPT_MACHINE_CHECK; 269 break; 270 case BOOK3S_IRQPRIO_DATA_STORAGE: 271 vec = BOOK3S_INTERRUPT_DATA_STORAGE; 272 break; 273 case BOOK3S_IRQPRIO_INST_STORAGE: 274 vec = BOOK3S_INTERRUPT_INST_STORAGE; 275 break; 276 case BOOK3S_IRQPRIO_DATA_SEGMENT: 277 vec = BOOK3S_INTERRUPT_DATA_SEGMENT; 278 break; 279 case BOOK3S_IRQPRIO_INST_SEGMENT: 280 vec = BOOK3S_INTERRUPT_INST_SEGMENT; 281 break; 282 case BOOK3S_IRQPRIO_ALIGNMENT: 283 vec = BOOK3S_INTERRUPT_ALIGNMENT; 284 break; 285 case BOOK3S_IRQPRIO_PROGRAM: 286 vec = BOOK3S_INTERRUPT_PROGRAM; 287 flags = to_book3s(vcpu)->prog_flags; 288 break; 289 case BOOK3S_IRQPRIO_VSX: 290 vec = BOOK3S_INTERRUPT_VSX; 291 break; 292 case BOOK3S_IRQPRIO_ALTIVEC: 293 vec = BOOK3S_INTERRUPT_ALTIVEC; 294 break; 295 case BOOK3S_IRQPRIO_FP_UNAVAIL: 296 vec = BOOK3S_INTERRUPT_FP_UNAVAIL; 297 break; 298 case BOOK3S_IRQPRIO_SYSCALL: 299 vec = BOOK3S_INTERRUPT_SYSCALL; 300 break; 301 case BOOK3S_IRQPRIO_DEBUG: 302 vec = BOOK3S_INTERRUPT_TRACE; 303 break; 304 case BOOK3S_IRQPRIO_PERFORMANCE_MONITOR: 305 vec = BOOK3S_INTERRUPT_PERFMON; 306 break; 307 default: 308 deliver = 0; 309 printk(KERN_ERR "KVM: Unknown interrupt: 0x%x\n", priority); 310 break; 311 } 312 313 #if 0 314 printk(KERN_INFO "Deliver interrupt 0x%x? %x\n", vec, deliver); 315 #endif 316 317 if (deliver) 318 kvmppc_inject_interrupt(vcpu, vec, flags); 319 320 return deliver; 321 } 322 323 void kvmppc_core_deliver_interrupts(struct kvm_vcpu *vcpu) 324 { 325 unsigned long *pending = &vcpu->arch.pending_exceptions; 326 unsigned int priority; 327 328 #ifdef EXIT_DEBUG 329 if (vcpu->arch.pending_exceptions) 330 printk(KERN_EMERG "KVM: Check pending: %lx\n", vcpu->arch.pending_exceptions); 331 #endif 332 priority = __ffs(*pending); 333 while (priority < BOOK3S_IRQPRIO_MAX) { 334 if (kvmppc_book3s_irqprio_deliver(vcpu, priority) && 335 (priority != BOOK3S_IRQPRIO_DECREMENTER)) { 336 /* DEC interrupts get cleared by mtdec */ 337 clear_bit(priority, &vcpu->arch.pending_exceptions); 338 break; 339 } 340 341 priority = find_next_bit(pending, 342 BITS_PER_BYTE * sizeof(*pending), 343 priority + 1); 344 } 345 } 346 347 void kvmppc_set_pvr(struct kvm_vcpu *vcpu, u32 pvr) 348 { 349 u32 host_pvr; 350 351 vcpu->arch.hflags &= ~BOOK3S_HFLAG_SLB; 352 vcpu->arch.pvr = pvr; 353 #ifdef CONFIG_PPC_BOOK3S_64 354 if ((pvr >= 0x330000) && (pvr < 0x70330000)) { 355 kvmppc_mmu_book3s_64_init(vcpu); 356 to_book3s(vcpu)->hior = 0xfff00000; 357 to_book3s(vcpu)->msr_mask = 0xffffffffffffffffULL; 358 } else 359 #endif 360 { 361 kvmppc_mmu_book3s_32_init(vcpu); 362 to_book3s(vcpu)->hior = 0; 363 to_book3s(vcpu)->msr_mask = 0xffffffffULL; 364 } 365 366 /* If we are in hypervisor level on 970, we can tell the CPU to 367 * treat DCBZ as 32 bytes store */ 368 vcpu->arch.hflags &= ~BOOK3S_HFLAG_DCBZ32; 369 if (vcpu->arch.mmu.is_dcbz32(vcpu) && (mfmsr() & MSR_HV) && 370 !strcmp(cur_cpu_spec->platform, "ppc970")) 371 vcpu->arch.hflags |= BOOK3S_HFLAG_DCBZ32; 372 373 /* Cell performs badly if MSR_FEx are set. So let's hope nobody 374 really needs them in a VM on Cell and force disable them. */ 375 if (!strcmp(cur_cpu_spec->platform, "ppc-cell-be")) 376 to_book3s(vcpu)->msr_mask &= ~(MSR_FE0 | MSR_FE1); 377 378 #ifdef CONFIG_PPC_BOOK3S_32 379 /* 32 bit Book3S always has 32 byte dcbz */ 380 vcpu->arch.hflags |= BOOK3S_HFLAG_DCBZ32; 381 #endif 382 383 /* On some CPUs we can execute paired single operations natively */ 384 asm ( "mfpvr %0" : "=r"(host_pvr)); 385 switch (host_pvr) { 386 case 0x00080200: /* lonestar 2.0 */ 387 case 0x00088202: /* lonestar 2.2 */ 388 case 0x70000100: /* gekko 1.0 */ 389 case 0x00080100: /* gekko 2.0 */ 390 case 0x00083203: /* gekko 2.3a */ 391 case 0x00083213: /* gekko 2.3b */ 392 case 0x00083204: /* gekko 2.4 */ 393 case 0x00083214: /* gekko 2.4e (8SE) - retail HW2 */ 394 case 0x00087200: /* broadway */ 395 vcpu->arch.hflags |= BOOK3S_HFLAG_NATIVE_PS; 396 /* Enable HID2.PSE - in case we need it later */ 397 mtspr(SPRN_HID2_GEKKO, mfspr(SPRN_HID2_GEKKO) | (1 << 29)); 398 } 399 } 400 401 /* Book3s_32 CPUs always have 32 bytes cache line size, which Linux assumes. To 402 * make Book3s_32 Linux work on Book3s_64, we have to make sure we trap dcbz to 403 * emulate 32 bytes dcbz length. 404 * 405 * The Book3s_64 inventors also realized this case and implemented a special bit 406 * in the HID5 register, which is a hypervisor ressource. Thus we can't use it. 407 * 408 * My approach here is to patch the dcbz instruction on executing pages. 409 */ 410 static void kvmppc_patch_dcbz(struct kvm_vcpu *vcpu, struct kvmppc_pte *pte) 411 { 412 struct page *hpage; 413 u64 hpage_offset; 414 u32 *page; 415 int i; 416 417 hpage = gfn_to_page(vcpu->kvm, pte->raddr >> PAGE_SHIFT); 418 if (is_error_page(hpage)) 419 return; 420 421 hpage_offset = pte->raddr & ~PAGE_MASK; 422 hpage_offset &= ~0xFFFULL; 423 hpage_offset /= 4; 424 425 get_page(hpage); 426 page = kmap_atomic(hpage, KM_USER0); 427 428 /* patch dcbz into reserved instruction, so we trap */ 429 for (i=hpage_offset; i < hpage_offset + (HW_PAGE_SIZE / 4); i++) 430 if ((page[i] & 0xff0007ff) == INS_DCBZ) 431 page[i] &= 0xfffffff7; 432 433 kunmap_atomic(page, KM_USER0); 434 put_page(hpage); 435 } 436 437 static int kvmppc_xlate(struct kvm_vcpu *vcpu, ulong eaddr, bool data, 438 struct kvmppc_pte *pte) 439 { 440 int relocated = (vcpu->arch.msr & (data ? MSR_DR : MSR_IR)); 441 int r; 442 443 if (relocated) { 444 r = vcpu->arch.mmu.xlate(vcpu, eaddr, pte, data); 445 } else { 446 pte->eaddr = eaddr; 447 pte->raddr = eaddr & 0xffffffff; 448 pte->vpage = VSID_REAL | eaddr >> 12; 449 pte->may_read = true; 450 pte->may_write = true; 451 pte->may_execute = true; 452 r = 0; 453 } 454 455 return r; 456 } 457 458 static hva_t kvmppc_bad_hva(void) 459 { 460 return PAGE_OFFSET; 461 } 462 463 static hva_t kvmppc_pte_to_hva(struct kvm_vcpu *vcpu, struct kvmppc_pte *pte, 464 bool read) 465 { 466 hva_t hpage; 467 468 if (read && !pte->may_read) 469 goto err; 470 471 if (!read && !pte->may_write) 472 goto err; 473 474 hpage = gfn_to_hva(vcpu->kvm, pte->raddr >> PAGE_SHIFT); 475 if (kvm_is_error_hva(hpage)) 476 goto err; 477 478 return hpage | (pte->raddr & ~PAGE_MASK); 479 err: 480 return kvmppc_bad_hva(); 481 } 482 483 int kvmppc_st(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr, 484 bool data) 485 { 486 struct kvmppc_pte pte; 487 488 vcpu->stat.st++; 489 490 if (kvmppc_xlate(vcpu, *eaddr, data, &pte)) 491 return -ENOENT; 492 493 *eaddr = pte.raddr; 494 495 if (!pte.may_write) 496 return -EPERM; 497 498 if (kvm_write_guest(vcpu->kvm, pte.raddr, ptr, size)) 499 return EMULATE_DO_MMIO; 500 501 return EMULATE_DONE; 502 } 503 504 int kvmppc_ld(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr, 505 bool data) 506 { 507 struct kvmppc_pte pte; 508 hva_t hva = *eaddr; 509 510 vcpu->stat.ld++; 511 512 if (kvmppc_xlate(vcpu, *eaddr, data, &pte)) 513 goto nopte; 514 515 *eaddr = pte.raddr; 516 517 hva = kvmppc_pte_to_hva(vcpu, &pte, true); 518 if (kvm_is_error_hva(hva)) 519 goto mmio; 520 521 if (copy_from_user(ptr, (void __user *)hva, size)) { 522 printk(KERN_INFO "kvmppc_ld at 0x%lx failed\n", hva); 523 goto mmio; 524 } 525 526 return EMULATE_DONE; 527 528 nopte: 529 return -ENOENT; 530 mmio: 531 return EMULATE_DO_MMIO; 532 } 533 534 static int kvmppc_visible_gfn(struct kvm_vcpu *vcpu, gfn_t gfn) 535 { 536 return kvm_is_visible_gfn(vcpu->kvm, gfn); 537 } 538 539 int kvmppc_handle_pagefault(struct kvm_run *run, struct kvm_vcpu *vcpu, 540 ulong eaddr, int vec) 541 { 542 bool data = (vec == BOOK3S_INTERRUPT_DATA_STORAGE); 543 int r = RESUME_GUEST; 544 int relocated; 545 int page_found = 0; 546 struct kvmppc_pte pte; 547 bool is_mmio = false; 548 bool dr = (vcpu->arch.msr & MSR_DR) ? true : false; 549 bool ir = (vcpu->arch.msr & MSR_IR) ? true : false; 550 u64 vsid; 551 552 relocated = data ? dr : ir; 553 554 /* Resolve real address if translation turned on */ 555 if (relocated) { 556 page_found = vcpu->arch.mmu.xlate(vcpu, eaddr, &pte, data); 557 } else { 558 pte.may_execute = true; 559 pte.may_read = true; 560 pte.may_write = true; 561 pte.raddr = eaddr & 0xffffffff; 562 pte.eaddr = eaddr; 563 pte.vpage = eaddr >> 12; 564 } 565 566 switch (vcpu->arch.msr & (MSR_DR|MSR_IR)) { 567 case 0: 568 pte.vpage |= ((u64)VSID_REAL << (SID_SHIFT - 12)); 569 break; 570 case MSR_DR: 571 case MSR_IR: 572 vcpu->arch.mmu.esid_to_vsid(vcpu, eaddr >> SID_SHIFT, &vsid); 573 574 if ((vcpu->arch.msr & (MSR_DR|MSR_IR)) == MSR_DR) 575 pte.vpage |= ((u64)VSID_REAL_DR << (SID_SHIFT - 12)); 576 else 577 pte.vpage |= ((u64)VSID_REAL_IR << (SID_SHIFT - 12)); 578 pte.vpage |= vsid; 579 580 if (vsid == -1) 581 page_found = -EINVAL; 582 break; 583 } 584 585 if (vcpu->arch.mmu.is_dcbz32(vcpu) && 586 (!(vcpu->arch.hflags & BOOK3S_HFLAG_DCBZ32))) { 587 /* 588 * If we do the dcbz hack, we have to NX on every execution, 589 * so we can patch the executing code. This renders our guest 590 * NX-less. 591 */ 592 pte.may_execute = !data; 593 } 594 595 if (page_found == -ENOENT) { 596 /* Page not found in guest PTE entries */ 597 vcpu->arch.dear = kvmppc_get_fault_dar(vcpu); 598 to_book3s(vcpu)->dsisr = to_svcpu(vcpu)->fault_dsisr; 599 vcpu->arch.msr |= (to_svcpu(vcpu)->shadow_srr1 & 0x00000000f8000000ULL); 600 kvmppc_book3s_queue_irqprio(vcpu, vec); 601 } else if (page_found == -EPERM) { 602 /* Storage protection */ 603 vcpu->arch.dear = kvmppc_get_fault_dar(vcpu); 604 to_book3s(vcpu)->dsisr = to_svcpu(vcpu)->fault_dsisr & ~DSISR_NOHPTE; 605 to_book3s(vcpu)->dsisr |= DSISR_PROTFAULT; 606 vcpu->arch.msr |= (to_svcpu(vcpu)->shadow_srr1 & 0x00000000f8000000ULL); 607 kvmppc_book3s_queue_irqprio(vcpu, vec); 608 } else if (page_found == -EINVAL) { 609 /* Page not found in guest SLB */ 610 vcpu->arch.dear = kvmppc_get_fault_dar(vcpu); 611 kvmppc_book3s_queue_irqprio(vcpu, vec + 0x80); 612 } else if (!is_mmio && 613 kvmppc_visible_gfn(vcpu, pte.raddr >> PAGE_SHIFT)) { 614 /* The guest's PTE is not mapped yet. Map on the host */ 615 kvmppc_mmu_map_page(vcpu, &pte); 616 if (data) 617 vcpu->stat.sp_storage++; 618 else if (vcpu->arch.mmu.is_dcbz32(vcpu) && 619 (!(vcpu->arch.hflags & BOOK3S_HFLAG_DCBZ32))) 620 kvmppc_patch_dcbz(vcpu, &pte); 621 } else { 622 /* MMIO */ 623 vcpu->stat.mmio_exits++; 624 vcpu->arch.paddr_accessed = pte.raddr; 625 r = kvmppc_emulate_mmio(run, vcpu); 626 if ( r == RESUME_HOST_NV ) 627 r = RESUME_HOST; 628 } 629 630 return r; 631 } 632 633 static inline int get_fpr_index(int i) 634 { 635 #ifdef CONFIG_VSX 636 i *= 2; 637 #endif 638 return i; 639 } 640 641 /* Give up external provider (FPU, Altivec, VSX) */ 642 void kvmppc_giveup_ext(struct kvm_vcpu *vcpu, ulong msr) 643 { 644 struct thread_struct *t = ¤t->thread; 645 u64 *vcpu_fpr = vcpu->arch.fpr; 646 #ifdef CONFIG_VSX 647 u64 *vcpu_vsx = vcpu->arch.vsr; 648 #endif 649 u64 *thread_fpr = (u64*)t->fpr; 650 int i; 651 652 if (!(vcpu->arch.guest_owned_ext & msr)) 653 return; 654 655 #ifdef DEBUG_EXT 656 printk(KERN_INFO "Giving up ext 0x%lx\n", msr); 657 #endif 658 659 switch (msr) { 660 case MSR_FP: 661 giveup_fpu(current); 662 for (i = 0; i < ARRAY_SIZE(vcpu->arch.fpr); i++) 663 vcpu_fpr[i] = thread_fpr[get_fpr_index(i)]; 664 665 vcpu->arch.fpscr = t->fpscr.val; 666 break; 667 case MSR_VEC: 668 #ifdef CONFIG_ALTIVEC 669 giveup_altivec(current); 670 memcpy(vcpu->arch.vr, t->vr, sizeof(vcpu->arch.vr)); 671 vcpu->arch.vscr = t->vscr; 672 #endif 673 break; 674 case MSR_VSX: 675 #ifdef CONFIG_VSX 676 __giveup_vsx(current); 677 for (i = 0; i < ARRAY_SIZE(vcpu->arch.vsr); i++) 678 vcpu_vsx[i] = thread_fpr[get_fpr_index(i) + 1]; 679 #endif 680 break; 681 default: 682 BUG(); 683 } 684 685 vcpu->arch.guest_owned_ext &= ~msr; 686 current->thread.regs->msr &= ~msr; 687 kvmppc_recalc_shadow_msr(vcpu); 688 } 689 690 static int kvmppc_read_inst(struct kvm_vcpu *vcpu) 691 { 692 ulong srr0 = kvmppc_get_pc(vcpu); 693 u32 last_inst = kvmppc_get_last_inst(vcpu); 694 int ret; 695 696 ret = kvmppc_ld(vcpu, &srr0, sizeof(u32), &last_inst, false); 697 if (ret == -ENOENT) { 698 vcpu->arch.msr = kvmppc_set_field(vcpu->arch.msr, 33, 33, 1); 699 vcpu->arch.msr = kvmppc_set_field(vcpu->arch.msr, 34, 36, 0); 700 vcpu->arch.msr = kvmppc_set_field(vcpu->arch.msr, 42, 47, 0); 701 kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_INST_STORAGE); 702 return EMULATE_AGAIN; 703 } 704 705 return EMULATE_DONE; 706 } 707 708 static int kvmppc_check_ext(struct kvm_vcpu *vcpu, unsigned int exit_nr) 709 { 710 711 /* Need to do paired single emulation? */ 712 if (!(vcpu->arch.hflags & BOOK3S_HFLAG_PAIRED_SINGLE)) 713 return EMULATE_DONE; 714 715 /* Read out the instruction */ 716 if (kvmppc_read_inst(vcpu) == EMULATE_DONE) 717 /* Need to emulate */ 718 return EMULATE_FAIL; 719 720 return EMULATE_AGAIN; 721 } 722 723 /* Handle external providers (FPU, Altivec, VSX) */ 724 static int kvmppc_handle_ext(struct kvm_vcpu *vcpu, unsigned int exit_nr, 725 ulong msr) 726 { 727 struct thread_struct *t = ¤t->thread; 728 u64 *vcpu_fpr = vcpu->arch.fpr; 729 #ifdef CONFIG_VSX 730 u64 *vcpu_vsx = vcpu->arch.vsr; 731 #endif 732 u64 *thread_fpr = (u64*)t->fpr; 733 int i; 734 735 /* When we have paired singles, we emulate in software */ 736 if (vcpu->arch.hflags & BOOK3S_HFLAG_PAIRED_SINGLE) 737 return RESUME_GUEST; 738 739 if (!(vcpu->arch.msr & msr)) { 740 kvmppc_book3s_queue_irqprio(vcpu, exit_nr); 741 return RESUME_GUEST; 742 } 743 744 /* We already own the ext */ 745 if (vcpu->arch.guest_owned_ext & msr) { 746 return RESUME_GUEST; 747 } 748 749 #ifdef DEBUG_EXT 750 printk(KERN_INFO "Loading up ext 0x%lx\n", msr); 751 #endif 752 753 current->thread.regs->msr |= msr; 754 755 switch (msr) { 756 case MSR_FP: 757 for (i = 0; i < ARRAY_SIZE(vcpu->arch.fpr); i++) 758 thread_fpr[get_fpr_index(i)] = vcpu_fpr[i]; 759 760 t->fpscr.val = vcpu->arch.fpscr; 761 t->fpexc_mode = 0; 762 kvmppc_load_up_fpu(); 763 break; 764 case MSR_VEC: 765 #ifdef CONFIG_ALTIVEC 766 memcpy(t->vr, vcpu->arch.vr, sizeof(vcpu->arch.vr)); 767 t->vscr = vcpu->arch.vscr; 768 t->vrsave = -1; 769 kvmppc_load_up_altivec(); 770 #endif 771 break; 772 case MSR_VSX: 773 #ifdef CONFIG_VSX 774 for (i = 0; i < ARRAY_SIZE(vcpu->arch.vsr); i++) 775 thread_fpr[get_fpr_index(i) + 1] = vcpu_vsx[i]; 776 kvmppc_load_up_vsx(); 777 #endif 778 break; 779 default: 780 BUG(); 781 } 782 783 vcpu->arch.guest_owned_ext |= msr; 784 785 kvmppc_recalc_shadow_msr(vcpu); 786 787 return RESUME_GUEST; 788 } 789 790 int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu, 791 unsigned int exit_nr) 792 { 793 int r = RESUME_HOST; 794 795 vcpu->stat.sum_exits++; 796 797 run->exit_reason = KVM_EXIT_UNKNOWN; 798 run->ready_for_interrupt_injection = 1; 799 #ifdef EXIT_DEBUG 800 printk(KERN_EMERG "exit_nr=0x%x | pc=0x%lx | dar=0x%lx | dec=0x%x | msr=0x%lx\n", 801 exit_nr, kvmppc_get_pc(vcpu), kvmppc_get_fault_dar(vcpu), 802 kvmppc_get_dec(vcpu), to_svcpu(vcpu)->shadow_srr1); 803 #elif defined (EXIT_DEBUG_SIMPLE) 804 if ((exit_nr != 0x900) && (exit_nr != 0x500)) 805 printk(KERN_EMERG "exit_nr=0x%x | pc=0x%lx | dar=0x%lx | msr=0x%lx\n", 806 exit_nr, kvmppc_get_pc(vcpu), kvmppc_get_fault_dar(vcpu), 807 vcpu->arch.msr); 808 #endif 809 kvm_resched(vcpu); 810 switch (exit_nr) { 811 case BOOK3S_INTERRUPT_INST_STORAGE: 812 vcpu->stat.pf_instruc++; 813 814 #ifdef CONFIG_PPC_BOOK3S_32 815 /* We set segments as unused segments when invalidating them. So 816 * treat the respective fault as segment fault. */ 817 if (to_svcpu(vcpu)->sr[kvmppc_get_pc(vcpu) >> SID_SHIFT] 818 == SR_INVALID) { 819 kvmppc_mmu_map_segment(vcpu, kvmppc_get_pc(vcpu)); 820 r = RESUME_GUEST; 821 break; 822 } 823 #endif 824 825 /* only care about PTEG not found errors, but leave NX alone */ 826 if (to_svcpu(vcpu)->shadow_srr1 & 0x40000000) { 827 r = kvmppc_handle_pagefault(run, vcpu, kvmppc_get_pc(vcpu), exit_nr); 828 vcpu->stat.sp_instruc++; 829 } else if (vcpu->arch.mmu.is_dcbz32(vcpu) && 830 (!(vcpu->arch.hflags & BOOK3S_HFLAG_DCBZ32))) { 831 /* 832 * XXX If we do the dcbz hack we use the NX bit to flush&patch the page, 833 * so we can't use the NX bit inside the guest. Let's cross our fingers, 834 * that no guest that needs the dcbz hack does NX. 835 */ 836 kvmppc_mmu_pte_flush(vcpu, kvmppc_get_pc(vcpu), ~0xFFFUL); 837 r = RESUME_GUEST; 838 } else { 839 vcpu->arch.msr |= to_svcpu(vcpu)->shadow_srr1 & 0x58000000; 840 kvmppc_book3s_queue_irqprio(vcpu, exit_nr); 841 kvmppc_mmu_pte_flush(vcpu, kvmppc_get_pc(vcpu), ~0xFFFUL); 842 r = RESUME_GUEST; 843 } 844 break; 845 case BOOK3S_INTERRUPT_DATA_STORAGE: 846 { 847 ulong dar = kvmppc_get_fault_dar(vcpu); 848 vcpu->stat.pf_storage++; 849 850 #ifdef CONFIG_PPC_BOOK3S_32 851 /* We set segments as unused segments when invalidating them. So 852 * treat the respective fault as segment fault. */ 853 if ((to_svcpu(vcpu)->sr[dar >> SID_SHIFT]) == SR_INVALID) { 854 kvmppc_mmu_map_segment(vcpu, dar); 855 r = RESUME_GUEST; 856 break; 857 } 858 #endif 859 860 /* The only case we need to handle is missing shadow PTEs */ 861 if (to_svcpu(vcpu)->fault_dsisr & DSISR_NOHPTE) { 862 r = kvmppc_handle_pagefault(run, vcpu, dar, exit_nr); 863 } else { 864 vcpu->arch.dear = dar; 865 to_book3s(vcpu)->dsisr = to_svcpu(vcpu)->fault_dsisr; 866 kvmppc_book3s_queue_irqprio(vcpu, exit_nr); 867 kvmppc_mmu_pte_flush(vcpu, vcpu->arch.dear, ~0xFFFUL); 868 r = RESUME_GUEST; 869 } 870 break; 871 } 872 case BOOK3S_INTERRUPT_DATA_SEGMENT: 873 if (kvmppc_mmu_map_segment(vcpu, kvmppc_get_fault_dar(vcpu)) < 0) { 874 vcpu->arch.dear = kvmppc_get_fault_dar(vcpu); 875 kvmppc_book3s_queue_irqprio(vcpu, 876 BOOK3S_INTERRUPT_DATA_SEGMENT); 877 } 878 r = RESUME_GUEST; 879 break; 880 case BOOK3S_INTERRUPT_INST_SEGMENT: 881 if (kvmppc_mmu_map_segment(vcpu, kvmppc_get_pc(vcpu)) < 0) { 882 kvmppc_book3s_queue_irqprio(vcpu, 883 BOOK3S_INTERRUPT_INST_SEGMENT); 884 } 885 r = RESUME_GUEST; 886 break; 887 /* We're good on these - the host merely wanted to get our attention */ 888 case BOOK3S_INTERRUPT_DECREMENTER: 889 vcpu->stat.dec_exits++; 890 r = RESUME_GUEST; 891 break; 892 case BOOK3S_INTERRUPT_EXTERNAL: 893 vcpu->stat.ext_intr_exits++; 894 r = RESUME_GUEST; 895 break; 896 case BOOK3S_INTERRUPT_PERFMON: 897 r = RESUME_GUEST; 898 break; 899 case BOOK3S_INTERRUPT_PROGRAM: 900 { 901 enum emulation_result er; 902 ulong flags; 903 904 program_interrupt: 905 flags = to_svcpu(vcpu)->shadow_srr1 & 0x1f0000ull; 906 907 if (vcpu->arch.msr & MSR_PR) { 908 #ifdef EXIT_DEBUG 909 printk(KERN_INFO "Userspace triggered 0x700 exception at 0x%lx (0x%x)\n", kvmppc_get_pc(vcpu), kvmppc_get_last_inst(vcpu)); 910 #endif 911 if ((kvmppc_get_last_inst(vcpu) & 0xff0007ff) != 912 (INS_DCBZ & 0xfffffff7)) { 913 kvmppc_core_queue_program(vcpu, flags); 914 r = RESUME_GUEST; 915 break; 916 } 917 } 918 919 vcpu->stat.emulated_inst_exits++; 920 er = kvmppc_emulate_instruction(run, vcpu); 921 switch (er) { 922 case EMULATE_DONE: 923 r = RESUME_GUEST_NV; 924 break; 925 case EMULATE_AGAIN: 926 r = RESUME_GUEST; 927 break; 928 case EMULATE_FAIL: 929 printk(KERN_CRIT "%s: emulation at %lx failed (%08x)\n", 930 __func__, kvmppc_get_pc(vcpu), kvmppc_get_last_inst(vcpu)); 931 kvmppc_core_queue_program(vcpu, flags); 932 r = RESUME_GUEST; 933 break; 934 case EMULATE_DO_MMIO: 935 run->exit_reason = KVM_EXIT_MMIO; 936 r = RESUME_HOST_NV; 937 break; 938 default: 939 BUG(); 940 } 941 break; 942 } 943 case BOOK3S_INTERRUPT_SYSCALL: 944 // XXX make user settable 945 if (vcpu->arch.osi_enabled && 946 (((u32)kvmppc_get_gpr(vcpu, 3)) == OSI_SC_MAGIC_R3) && 947 (((u32)kvmppc_get_gpr(vcpu, 4)) == OSI_SC_MAGIC_R4)) { 948 u64 *gprs = run->osi.gprs; 949 int i; 950 951 run->exit_reason = KVM_EXIT_OSI; 952 for (i = 0; i < 32; i++) 953 gprs[i] = kvmppc_get_gpr(vcpu, i); 954 vcpu->arch.osi_needed = 1; 955 r = RESUME_HOST_NV; 956 957 } else { 958 vcpu->stat.syscall_exits++; 959 kvmppc_book3s_queue_irqprio(vcpu, exit_nr); 960 r = RESUME_GUEST; 961 } 962 break; 963 case BOOK3S_INTERRUPT_FP_UNAVAIL: 964 case BOOK3S_INTERRUPT_ALTIVEC: 965 case BOOK3S_INTERRUPT_VSX: 966 { 967 int ext_msr = 0; 968 969 switch (exit_nr) { 970 case BOOK3S_INTERRUPT_FP_UNAVAIL: ext_msr = MSR_FP; break; 971 case BOOK3S_INTERRUPT_ALTIVEC: ext_msr = MSR_VEC; break; 972 case BOOK3S_INTERRUPT_VSX: ext_msr = MSR_VSX; break; 973 } 974 975 switch (kvmppc_check_ext(vcpu, exit_nr)) { 976 case EMULATE_DONE: 977 /* everything ok - let's enable the ext */ 978 r = kvmppc_handle_ext(vcpu, exit_nr, ext_msr); 979 break; 980 case EMULATE_FAIL: 981 /* we need to emulate this instruction */ 982 goto program_interrupt; 983 break; 984 default: 985 /* nothing to worry about - go again */ 986 break; 987 } 988 break; 989 } 990 case BOOK3S_INTERRUPT_ALIGNMENT: 991 if (kvmppc_read_inst(vcpu) == EMULATE_DONE) { 992 to_book3s(vcpu)->dsisr = kvmppc_alignment_dsisr(vcpu, 993 kvmppc_get_last_inst(vcpu)); 994 vcpu->arch.dear = kvmppc_alignment_dar(vcpu, 995 kvmppc_get_last_inst(vcpu)); 996 kvmppc_book3s_queue_irqprio(vcpu, exit_nr); 997 } 998 r = RESUME_GUEST; 999 break; 1000 case BOOK3S_INTERRUPT_MACHINE_CHECK: 1001 case BOOK3S_INTERRUPT_TRACE: 1002 kvmppc_book3s_queue_irqprio(vcpu, exit_nr); 1003 r = RESUME_GUEST; 1004 break; 1005 default: 1006 /* Ugh - bork here! What did we get? */ 1007 printk(KERN_EMERG "exit_nr=0x%x | pc=0x%lx | msr=0x%lx\n", 1008 exit_nr, kvmppc_get_pc(vcpu), to_svcpu(vcpu)->shadow_srr1); 1009 r = RESUME_HOST; 1010 BUG(); 1011 break; 1012 } 1013 1014 1015 if (!(r & RESUME_HOST)) { 1016 /* To avoid clobbering exit_reason, only check for signals if 1017 * we aren't already exiting to userspace for some other 1018 * reason. */ 1019 if (signal_pending(current)) { 1020 #ifdef EXIT_DEBUG 1021 printk(KERN_EMERG "KVM: Going back to host\n"); 1022 #endif 1023 vcpu->stat.signal_exits++; 1024 run->exit_reason = KVM_EXIT_INTR; 1025 r = -EINTR; 1026 } else { 1027 /* In case an interrupt came in that was triggered 1028 * from userspace (like DEC), we need to check what 1029 * to inject now! */ 1030 kvmppc_core_deliver_interrupts(vcpu); 1031 } 1032 } 1033 1034 #ifdef EXIT_DEBUG 1035 printk(KERN_EMERG "KVM exit: vcpu=0x%p pc=0x%lx r=0x%x\n", vcpu, kvmppc_get_pc(vcpu), r); 1036 #endif 1037 1038 return r; 1039 } 1040 1041 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) 1042 { 1043 return 0; 1044 } 1045 1046 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) 1047 { 1048 int i; 1049 1050 vcpu_load(vcpu); 1051 1052 regs->pc = kvmppc_get_pc(vcpu); 1053 regs->cr = kvmppc_get_cr(vcpu); 1054 regs->ctr = kvmppc_get_ctr(vcpu); 1055 regs->lr = kvmppc_get_lr(vcpu); 1056 regs->xer = kvmppc_get_xer(vcpu); 1057 regs->msr = vcpu->arch.msr; 1058 regs->srr0 = vcpu->arch.srr0; 1059 regs->srr1 = vcpu->arch.srr1; 1060 regs->pid = vcpu->arch.pid; 1061 regs->sprg0 = vcpu->arch.sprg0; 1062 regs->sprg1 = vcpu->arch.sprg1; 1063 regs->sprg2 = vcpu->arch.sprg2; 1064 regs->sprg3 = vcpu->arch.sprg3; 1065 regs->sprg5 = vcpu->arch.sprg4; 1066 regs->sprg6 = vcpu->arch.sprg5; 1067 regs->sprg7 = vcpu->arch.sprg6; 1068 1069 for (i = 0; i < ARRAY_SIZE(regs->gpr); i++) 1070 regs->gpr[i] = kvmppc_get_gpr(vcpu, i); 1071 1072 vcpu_put(vcpu); 1073 1074 return 0; 1075 } 1076 1077 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) 1078 { 1079 int i; 1080 1081 vcpu_load(vcpu); 1082 1083 kvmppc_set_pc(vcpu, regs->pc); 1084 kvmppc_set_cr(vcpu, regs->cr); 1085 kvmppc_set_ctr(vcpu, regs->ctr); 1086 kvmppc_set_lr(vcpu, regs->lr); 1087 kvmppc_set_xer(vcpu, regs->xer); 1088 kvmppc_set_msr(vcpu, regs->msr); 1089 vcpu->arch.srr0 = regs->srr0; 1090 vcpu->arch.srr1 = regs->srr1; 1091 vcpu->arch.sprg0 = regs->sprg0; 1092 vcpu->arch.sprg1 = regs->sprg1; 1093 vcpu->arch.sprg2 = regs->sprg2; 1094 vcpu->arch.sprg3 = regs->sprg3; 1095 vcpu->arch.sprg5 = regs->sprg4; 1096 vcpu->arch.sprg6 = regs->sprg5; 1097 vcpu->arch.sprg7 = regs->sprg6; 1098 1099 for (i = 0; i < ARRAY_SIZE(regs->gpr); i++) 1100 kvmppc_set_gpr(vcpu, i, regs->gpr[i]); 1101 1102 vcpu_put(vcpu); 1103 1104 return 0; 1105 } 1106 1107 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, 1108 struct kvm_sregs *sregs) 1109 { 1110 struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu); 1111 int i; 1112 1113 vcpu_load(vcpu); 1114 1115 sregs->pvr = vcpu->arch.pvr; 1116 1117 sregs->u.s.sdr1 = to_book3s(vcpu)->sdr1; 1118 if (vcpu->arch.hflags & BOOK3S_HFLAG_SLB) { 1119 for (i = 0; i < 64; i++) { 1120 sregs->u.s.ppc64.slb[i].slbe = vcpu3s->slb[i].orige | i; 1121 sregs->u.s.ppc64.slb[i].slbv = vcpu3s->slb[i].origv; 1122 } 1123 } else { 1124 for (i = 0; i < 16; i++) { 1125 sregs->u.s.ppc32.sr[i] = vcpu3s->sr[i].raw; 1126 sregs->u.s.ppc32.sr[i] = vcpu3s->sr[i].raw; 1127 } 1128 for (i = 0; i < 8; i++) { 1129 sregs->u.s.ppc32.ibat[i] = vcpu3s->ibat[i].raw; 1130 sregs->u.s.ppc32.dbat[i] = vcpu3s->dbat[i].raw; 1131 } 1132 } 1133 1134 vcpu_put(vcpu); 1135 1136 return 0; 1137 } 1138 1139 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, 1140 struct kvm_sregs *sregs) 1141 { 1142 struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu); 1143 int i; 1144 1145 vcpu_load(vcpu); 1146 1147 kvmppc_set_pvr(vcpu, sregs->pvr); 1148 1149 vcpu3s->sdr1 = sregs->u.s.sdr1; 1150 if (vcpu->arch.hflags & BOOK3S_HFLAG_SLB) { 1151 for (i = 0; i < 64; i++) { 1152 vcpu->arch.mmu.slbmte(vcpu, sregs->u.s.ppc64.slb[i].slbv, 1153 sregs->u.s.ppc64.slb[i].slbe); 1154 } 1155 } else { 1156 for (i = 0; i < 16; i++) { 1157 vcpu->arch.mmu.mtsrin(vcpu, i, sregs->u.s.ppc32.sr[i]); 1158 } 1159 for (i = 0; i < 8; i++) { 1160 kvmppc_set_bat(vcpu, &(vcpu3s->ibat[i]), false, 1161 (u32)sregs->u.s.ppc32.ibat[i]); 1162 kvmppc_set_bat(vcpu, &(vcpu3s->ibat[i]), true, 1163 (u32)(sregs->u.s.ppc32.ibat[i] >> 32)); 1164 kvmppc_set_bat(vcpu, &(vcpu3s->dbat[i]), false, 1165 (u32)sregs->u.s.ppc32.dbat[i]); 1166 kvmppc_set_bat(vcpu, &(vcpu3s->dbat[i]), true, 1167 (u32)(sregs->u.s.ppc32.dbat[i] >> 32)); 1168 } 1169 } 1170 1171 /* Flush the MMU after messing with the segments */ 1172 kvmppc_mmu_pte_flush(vcpu, 0, 0); 1173 1174 vcpu_put(vcpu); 1175 1176 return 0; 1177 } 1178 1179 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) 1180 { 1181 return -ENOTSUPP; 1182 } 1183 1184 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) 1185 { 1186 return -ENOTSUPP; 1187 } 1188 1189 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, 1190 struct kvm_translation *tr) 1191 { 1192 return 0; 1193 } 1194 1195 /* 1196 * Get (and clear) the dirty memory log for a memory slot. 1197 */ 1198 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, 1199 struct kvm_dirty_log *log) 1200 { 1201 struct kvm_memory_slot *memslot; 1202 struct kvm_vcpu *vcpu; 1203 ulong ga, ga_end; 1204 int is_dirty = 0; 1205 int r; 1206 unsigned long n; 1207 1208 mutex_lock(&kvm->slots_lock); 1209 1210 r = kvm_get_dirty_log(kvm, log, &is_dirty); 1211 if (r) 1212 goto out; 1213 1214 /* If nothing is dirty, don't bother messing with page tables. */ 1215 if (is_dirty) { 1216 memslot = &kvm->memslots->memslots[log->slot]; 1217 1218 ga = memslot->base_gfn << PAGE_SHIFT; 1219 ga_end = ga + (memslot->npages << PAGE_SHIFT); 1220 1221 kvm_for_each_vcpu(n, vcpu, kvm) 1222 kvmppc_mmu_pte_pflush(vcpu, ga, ga_end); 1223 1224 n = kvm_dirty_bitmap_bytes(memslot); 1225 memset(memslot->dirty_bitmap, 0, n); 1226 } 1227 1228 r = 0; 1229 out: 1230 mutex_unlock(&kvm->slots_lock); 1231 return r; 1232 } 1233 1234 int kvmppc_core_check_processor_compat(void) 1235 { 1236 return 0; 1237 } 1238 1239 struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm *kvm, unsigned int id) 1240 { 1241 struct kvmppc_vcpu_book3s *vcpu_book3s; 1242 struct kvm_vcpu *vcpu; 1243 int err = -ENOMEM; 1244 1245 vcpu_book3s = vmalloc(sizeof(struct kvmppc_vcpu_book3s)); 1246 if (!vcpu_book3s) 1247 goto out; 1248 1249 memset(vcpu_book3s, 0, sizeof(struct kvmppc_vcpu_book3s)); 1250 1251 vcpu_book3s->shadow_vcpu = (struct kvmppc_book3s_shadow_vcpu *) 1252 kzalloc(sizeof(*vcpu_book3s->shadow_vcpu), GFP_KERNEL); 1253 if (!vcpu_book3s->shadow_vcpu) 1254 goto free_vcpu; 1255 1256 vcpu = &vcpu_book3s->vcpu; 1257 err = kvm_vcpu_init(vcpu, kvm, id); 1258 if (err) 1259 goto free_shadow_vcpu; 1260 1261 vcpu->arch.host_retip = kvm_return_point; 1262 vcpu->arch.host_msr = mfmsr(); 1263 #ifdef CONFIG_PPC_BOOK3S_64 1264 /* default to book3s_64 (970fx) */ 1265 vcpu->arch.pvr = 0x3C0301; 1266 #else 1267 /* default to book3s_32 (750) */ 1268 vcpu->arch.pvr = 0x84202; 1269 #endif 1270 kvmppc_set_pvr(vcpu, vcpu->arch.pvr); 1271 vcpu_book3s->slb_nr = 64; 1272 1273 /* remember where some real-mode handlers are */ 1274 vcpu->arch.trampoline_lowmem = kvmppc_trampoline_lowmem; 1275 vcpu->arch.trampoline_enter = kvmppc_trampoline_enter; 1276 vcpu->arch.highmem_handler = (ulong)kvmppc_handler_highmem; 1277 #ifdef CONFIG_PPC_BOOK3S_64 1278 vcpu->arch.rmcall = *(ulong*)kvmppc_rmcall; 1279 #else 1280 vcpu->arch.rmcall = (ulong)kvmppc_rmcall; 1281 #endif 1282 1283 vcpu->arch.shadow_msr = MSR_USER64; 1284 1285 err = kvmppc_mmu_init(vcpu); 1286 if (err < 0) 1287 goto free_shadow_vcpu; 1288 1289 return vcpu; 1290 1291 free_shadow_vcpu: 1292 kfree(vcpu_book3s->shadow_vcpu); 1293 free_vcpu: 1294 vfree(vcpu_book3s); 1295 out: 1296 return ERR_PTR(err); 1297 } 1298 1299 void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu) 1300 { 1301 struct kvmppc_vcpu_book3s *vcpu_book3s = to_book3s(vcpu); 1302 1303 kvm_vcpu_uninit(vcpu); 1304 kfree(vcpu_book3s->shadow_vcpu); 1305 vfree(vcpu_book3s); 1306 } 1307 1308 extern int __kvmppc_vcpu_entry(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu); 1309 int __kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu) 1310 { 1311 int ret; 1312 struct thread_struct ext_bkp; 1313 #ifdef CONFIG_ALTIVEC 1314 bool save_vec = current->thread.used_vr; 1315 #endif 1316 #ifdef CONFIG_VSX 1317 bool save_vsx = current->thread.used_vsr; 1318 #endif 1319 ulong ext_msr; 1320 1321 /* No need to go into the guest when all we do is going out */ 1322 if (signal_pending(current)) { 1323 kvm_run->exit_reason = KVM_EXIT_INTR; 1324 return -EINTR; 1325 } 1326 1327 /* Save FPU state in stack */ 1328 if (current->thread.regs->msr & MSR_FP) 1329 giveup_fpu(current); 1330 memcpy(ext_bkp.fpr, current->thread.fpr, sizeof(current->thread.fpr)); 1331 ext_bkp.fpscr = current->thread.fpscr; 1332 ext_bkp.fpexc_mode = current->thread.fpexc_mode; 1333 1334 #ifdef CONFIG_ALTIVEC 1335 /* Save Altivec state in stack */ 1336 if (save_vec) { 1337 if (current->thread.regs->msr & MSR_VEC) 1338 giveup_altivec(current); 1339 memcpy(ext_bkp.vr, current->thread.vr, sizeof(ext_bkp.vr)); 1340 ext_bkp.vscr = current->thread.vscr; 1341 ext_bkp.vrsave = current->thread.vrsave; 1342 } 1343 ext_bkp.used_vr = current->thread.used_vr; 1344 #endif 1345 1346 #ifdef CONFIG_VSX 1347 /* Save VSX state in stack */ 1348 if (save_vsx && (current->thread.regs->msr & MSR_VSX)) 1349 __giveup_vsx(current); 1350 ext_bkp.used_vsr = current->thread.used_vsr; 1351 #endif 1352 1353 /* Remember the MSR with disabled extensions */ 1354 ext_msr = current->thread.regs->msr; 1355 1356 /* XXX we get called with irq disabled - change that! */ 1357 local_irq_enable(); 1358 1359 /* Preload FPU if it's enabled */ 1360 if (vcpu->arch.msr & MSR_FP) 1361 kvmppc_handle_ext(vcpu, BOOK3S_INTERRUPT_FP_UNAVAIL, MSR_FP); 1362 1363 ret = __kvmppc_vcpu_entry(kvm_run, vcpu); 1364 1365 local_irq_disable(); 1366 1367 current->thread.regs->msr = ext_msr; 1368 1369 /* Make sure we save the guest FPU/Altivec/VSX state */ 1370 kvmppc_giveup_ext(vcpu, MSR_FP); 1371 kvmppc_giveup_ext(vcpu, MSR_VEC); 1372 kvmppc_giveup_ext(vcpu, MSR_VSX); 1373 1374 /* Restore FPU state from stack */ 1375 memcpy(current->thread.fpr, ext_bkp.fpr, sizeof(ext_bkp.fpr)); 1376 current->thread.fpscr = ext_bkp.fpscr; 1377 current->thread.fpexc_mode = ext_bkp.fpexc_mode; 1378 1379 #ifdef CONFIG_ALTIVEC 1380 /* Restore Altivec state from stack */ 1381 if (save_vec && current->thread.used_vr) { 1382 memcpy(current->thread.vr, ext_bkp.vr, sizeof(ext_bkp.vr)); 1383 current->thread.vscr = ext_bkp.vscr; 1384 current->thread.vrsave= ext_bkp.vrsave; 1385 } 1386 current->thread.used_vr = ext_bkp.used_vr; 1387 #endif 1388 1389 #ifdef CONFIG_VSX 1390 current->thread.used_vsr = ext_bkp.used_vsr; 1391 #endif 1392 1393 return ret; 1394 } 1395 1396 static int kvmppc_book3s_init(void) 1397 { 1398 return kvm_init(NULL, sizeof(struct kvmppc_vcpu_book3s), 0, 1399 THIS_MODULE); 1400 } 1401 1402 static void kvmppc_book3s_exit(void) 1403 { 1404 kvm_exit(); 1405 } 1406 1407 module_init(kvmppc_book3s_init); 1408 module_exit(kvmppc_book3s_exit); 1409