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