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 * Scott Wood <scottwood@freescale.com> 21 * Varun Sethi <varun.sethi@freescale.com> 22 */ 23 24 #include <linux/errno.h> 25 #include <linux/err.h> 26 #include <linux/kvm_host.h> 27 #include <linux/gfp.h> 28 #include <linux/module.h> 29 #include <linux/vmalloc.h> 30 #include <linux/fs.h> 31 32 #include <asm/cputable.h> 33 #include <asm/uaccess.h> 34 #include <asm/kvm_ppc.h> 35 #include <asm/cacheflush.h> 36 #include <asm/dbell.h> 37 #include <asm/hw_irq.h> 38 #include <asm/irq.h> 39 #include <asm/time.h> 40 41 #include "timing.h" 42 #include "booke.h" 43 44 #define CREATE_TRACE_POINTS 45 #include "trace_booke.h" 46 47 unsigned long kvmppc_booke_handlers; 48 49 #define VM_STAT(x) offsetof(struct kvm, stat.x), KVM_STAT_VM 50 #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU 51 52 struct kvm_stats_debugfs_item debugfs_entries[] = { 53 { "mmio", VCPU_STAT(mmio_exits) }, 54 { "dcr", VCPU_STAT(dcr_exits) }, 55 { "sig", VCPU_STAT(signal_exits) }, 56 { "itlb_r", VCPU_STAT(itlb_real_miss_exits) }, 57 { "itlb_v", VCPU_STAT(itlb_virt_miss_exits) }, 58 { "dtlb_r", VCPU_STAT(dtlb_real_miss_exits) }, 59 { "dtlb_v", VCPU_STAT(dtlb_virt_miss_exits) }, 60 { "sysc", VCPU_STAT(syscall_exits) }, 61 { "isi", VCPU_STAT(isi_exits) }, 62 { "dsi", VCPU_STAT(dsi_exits) }, 63 { "inst_emu", VCPU_STAT(emulated_inst_exits) }, 64 { "dec", VCPU_STAT(dec_exits) }, 65 { "ext_intr", VCPU_STAT(ext_intr_exits) }, 66 { "halt_wakeup", VCPU_STAT(halt_wakeup) }, 67 { "doorbell", VCPU_STAT(dbell_exits) }, 68 { "guest doorbell", VCPU_STAT(gdbell_exits) }, 69 { "remote_tlb_flush", VM_STAT(remote_tlb_flush) }, 70 { NULL } 71 }; 72 73 /* TODO: use vcpu_printf() */ 74 void kvmppc_dump_vcpu(struct kvm_vcpu *vcpu) 75 { 76 int i; 77 78 printk("pc: %08lx msr: %08llx\n", vcpu->arch.pc, vcpu->arch.shared->msr); 79 printk("lr: %08lx ctr: %08lx\n", vcpu->arch.lr, vcpu->arch.ctr); 80 printk("srr0: %08llx srr1: %08llx\n", vcpu->arch.shared->srr0, 81 vcpu->arch.shared->srr1); 82 83 printk("exceptions: %08lx\n", vcpu->arch.pending_exceptions); 84 85 for (i = 0; i < 32; i += 4) { 86 printk("gpr%02d: %08lx %08lx %08lx %08lx\n", i, 87 kvmppc_get_gpr(vcpu, i), 88 kvmppc_get_gpr(vcpu, i+1), 89 kvmppc_get_gpr(vcpu, i+2), 90 kvmppc_get_gpr(vcpu, i+3)); 91 } 92 } 93 94 #ifdef CONFIG_SPE 95 void kvmppc_vcpu_disable_spe(struct kvm_vcpu *vcpu) 96 { 97 preempt_disable(); 98 enable_kernel_spe(); 99 kvmppc_save_guest_spe(vcpu); 100 vcpu->arch.shadow_msr &= ~MSR_SPE; 101 preempt_enable(); 102 } 103 104 static void kvmppc_vcpu_enable_spe(struct kvm_vcpu *vcpu) 105 { 106 preempt_disable(); 107 enable_kernel_spe(); 108 kvmppc_load_guest_spe(vcpu); 109 vcpu->arch.shadow_msr |= MSR_SPE; 110 preempt_enable(); 111 } 112 113 static void kvmppc_vcpu_sync_spe(struct kvm_vcpu *vcpu) 114 { 115 if (vcpu->arch.shared->msr & MSR_SPE) { 116 if (!(vcpu->arch.shadow_msr & MSR_SPE)) 117 kvmppc_vcpu_enable_spe(vcpu); 118 } else if (vcpu->arch.shadow_msr & MSR_SPE) { 119 kvmppc_vcpu_disable_spe(vcpu); 120 } 121 } 122 #else 123 static void kvmppc_vcpu_sync_spe(struct kvm_vcpu *vcpu) 124 { 125 } 126 #endif 127 128 static void kvmppc_vcpu_sync_fpu(struct kvm_vcpu *vcpu) 129 { 130 #if defined(CONFIG_PPC_FPU) && !defined(CONFIG_KVM_BOOKE_HV) 131 /* We always treat the FP bit as enabled from the host 132 perspective, so only need to adjust the shadow MSR */ 133 vcpu->arch.shadow_msr &= ~MSR_FP; 134 vcpu->arch.shadow_msr |= vcpu->arch.shared->msr & MSR_FP; 135 #endif 136 } 137 138 static void kvmppc_vcpu_sync_debug(struct kvm_vcpu *vcpu) 139 { 140 /* Synchronize guest's desire to get debug interrupts into shadow MSR */ 141 #ifndef CONFIG_KVM_BOOKE_HV 142 vcpu->arch.shadow_msr &= ~MSR_DE; 143 vcpu->arch.shadow_msr |= vcpu->arch.shared->msr & MSR_DE; 144 #endif 145 146 /* Force enable debug interrupts when user space wants to debug */ 147 if (vcpu->guest_debug) { 148 #ifdef CONFIG_KVM_BOOKE_HV 149 /* 150 * Since there is no shadow MSR, sync MSR_DE into the guest 151 * visible MSR. 152 */ 153 vcpu->arch.shared->msr |= MSR_DE; 154 #else 155 vcpu->arch.shadow_msr |= MSR_DE; 156 vcpu->arch.shared->msr &= ~MSR_DE; 157 #endif 158 } 159 } 160 161 /* 162 * Helper function for "full" MSR writes. No need to call this if only 163 * EE/CE/ME/DE/RI are changing. 164 */ 165 void kvmppc_set_msr(struct kvm_vcpu *vcpu, u32 new_msr) 166 { 167 u32 old_msr = vcpu->arch.shared->msr; 168 169 #ifdef CONFIG_KVM_BOOKE_HV 170 new_msr |= MSR_GS; 171 #endif 172 173 vcpu->arch.shared->msr = new_msr; 174 175 kvmppc_mmu_msr_notify(vcpu, old_msr); 176 kvmppc_vcpu_sync_spe(vcpu); 177 kvmppc_vcpu_sync_fpu(vcpu); 178 kvmppc_vcpu_sync_debug(vcpu); 179 } 180 181 static void kvmppc_booke_queue_irqprio(struct kvm_vcpu *vcpu, 182 unsigned int priority) 183 { 184 trace_kvm_booke_queue_irqprio(vcpu, priority); 185 set_bit(priority, &vcpu->arch.pending_exceptions); 186 } 187 188 static void kvmppc_core_queue_dtlb_miss(struct kvm_vcpu *vcpu, 189 ulong dear_flags, ulong esr_flags) 190 { 191 vcpu->arch.queued_dear = dear_flags; 192 vcpu->arch.queued_esr = esr_flags; 193 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DTLB_MISS); 194 } 195 196 static void kvmppc_core_queue_data_storage(struct kvm_vcpu *vcpu, 197 ulong dear_flags, ulong esr_flags) 198 { 199 vcpu->arch.queued_dear = dear_flags; 200 vcpu->arch.queued_esr = esr_flags; 201 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DATA_STORAGE); 202 } 203 204 static void kvmppc_core_queue_inst_storage(struct kvm_vcpu *vcpu, 205 ulong esr_flags) 206 { 207 vcpu->arch.queued_esr = esr_flags; 208 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_INST_STORAGE); 209 } 210 211 static void kvmppc_core_queue_alignment(struct kvm_vcpu *vcpu, ulong dear_flags, 212 ulong esr_flags) 213 { 214 vcpu->arch.queued_dear = dear_flags; 215 vcpu->arch.queued_esr = esr_flags; 216 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ALIGNMENT); 217 } 218 219 void kvmppc_core_queue_program(struct kvm_vcpu *vcpu, ulong esr_flags) 220 { 221 vcpu->arch.queued_esr = esr_flags; 222 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_PROGRAM); 223 } 224 225 void kvmppc_core_queue_dec(struct kvm_vcpu *vcpu) 226 { 227 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DECREMENTER); 228 } 229 230 int kvmppc_core_pending_dec(struct kvm_vcpu *vcpu) 231 { 232 return test_bit(BOOKE_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions); 233 } 234 235 void kvmppc_core_dequeue_dec(struct kvm_vcpu *vcpu) 236 { 237 clear_bit(BOOKE_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions); 238 } 239 240 void kvmppc_core_queue_external(struct kvm_vcpu *vcpu, 241 struct kvm_interrupt *irq) 242 { 243 unsigned int prio = BOOKE_IRQPRIO_EXTERNAL; 244 245 if (irq->irq == KVM_INTERRUPT_SET_LEVEL) 246 prio = BOOKE_IRQPRIO_EXTERNAL_LEVEL; 247 248 kvmppc_booke_queue_irqprio(vcpu, prio); 249 } 250 251 void kvmppc_core_dequeue_external(struct kvm_vcpu *vcpu) 252 { 253 clear_bit(BOOKE_IRQPRIO_EXTERNAL, &vcpu->arch.pending_exceptions); 254 clear_bit(BOOKE_IRQPRIO_EXTERNAL_LEVEL, &vcpu->arch.pending_exceptions); 255 } 256 257 static void kvmppc_core_queue_watchdog(struct kvm_vcpu *vcpu) 258 { 259 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_WATCHDOG); 260 } 261 262 static void kvmppc_core_dequeue_watchdog(struct kvm_vcpu *vcpu) 263 { 264 clear_bit(BOOKE_IRQPRIO_WATCHDOG, &vcpu->arch.pending_exceptions); 265 } 266 267 static void set_guest_srr(struct kvm_vcpu *vcpu, unsigned long srr0, u32 srr1) 268 { 269 #ifdef CONFIG_KVM_BOOKE_HV 270 mtspr(SPRN_GSRR0, srr0); 271 mtspr(SPRN_GSRR1, srr1); 272 #else 273 vcpu->arch.shared->srr0 = srr0; 274 vcpu->arch.shared->srr1 = srr1; 275 #endif 276 } 277 278 static void set_guest_csrr(struct kvm_vcpu *vcpu, unsigned long srr0, u32 srr1) 279 { 280 vcpu->arch.csrr0 = srr0; 281 vcpu->arch.csrr1 = srr1; 282 } 283 284 static void set_guest_dsrr(struct kvm_vcpu *vcpu, unsigned long srr0, u32 srr1) 285 { 286 if (cpu_has_feature(CPU_FTR_DEBUG_LVL_EXC)) { 287 vcpu->arch.dsrr0 = srr0; 288 vcpu->arch.dsrr1 = srr1; 289 } else { 290 set_guest_csrr(vcpu, srr0, srr1); 291 } 292 } 293 294 static void set_guest_mcsrr(struct kvm_vcpu *vcpu, unsigned long srr0, u32 srr1) 295 { 296 vcpu->arch.mcsrr0 = srr0; 297 vcpu->arch.mcsrr1 = srr1; 298 } 299 300 static unsigned long get_guest_dear(struct kvm_vcpu *vcpu) 301 { 302 #ifdef CONFIG_KVM_BOOKE_HV 303 return mfspr(SPRN_GDEAR); 304 #else 305 return vcpu->arch.shared->dar; 306 #endif 307 } 308 309 static void set_guest_dear(struct kvm_vcpu *vcpu, unsigned long dear) 310 { 311 #ifdef CONFIG_KVM_BOOKE_HV 312 mtspr(SPRN_GDEAR, dear); 313 #else 314 vcpu->arch.shared->dar = dear; 315 #endif 316 } 317 318 static unsigned long get_guest_esr(struct kvm_vcpu *vcpu) 319 { 320 #ifdef CONFIG_KVM_BOOKE_HV 321 return mfspr(SPRN_GESR); 322 #else 323 return vcpu->arch.shared->esr; 324 #endif 325 } 326 327 static void set_guest_esr(struct kvm_vcpu *vcpu, u32 esr) 328 { 329 #ifdef CONFIG_KVM_BOOKE_HV 330 mtspr(SPRN_GESR, esr); 331 #else 332 vcpu->arch.shared->esr = esr; 333 #endif 334 } 335 336 static unsigned long get_guest_epr(struct kvm_vcpu *vcpu) 337 { 338 #ifdef CONFIG_KVM_BOOKE_HV 339 return mfspr(SPRN_GEPR); 340 #else 341 return vcpu->arch.epr; 342 #endif 343 } 344 345 /* Deliver the interrupt of the corresponding priority, if possible. */ 346 static int kvmppc_booke_irqprio_deliver(struct kvm_vcpu *vcpu, 347 unsigned int priority) 348 { 349 int allowed = 0; 350 ulong msr_mask = 0; 351 bool update_esr = false, update_dear = false, update_epr = false; 352 ulong crit_raw = vcpu->arch.shared->critical; 353 ulong crit_r1 = kvmppc_get_gpr(vcpu, 1); 354 bool crit; 355 bool keep_irq = false; 356 enum int_class int_class; 357 ulong new_msr = vcpu->arch.shared->msr; 358 359 /* Truncate crit indicators in 32 bit mode */ 360 if (!(vcpu->arch.shared->msr & MSR_SF)) { 361 crit_raw &= 0xffffffff; 362 crit_r1 &= 0xffffffff; 363 } 364 365 /* Critical section when crit == r1 */ 366 crit = (crit_raw == crit_r1); 367 /* ... and we're in supervisor mode */ 368 crit = crit && !(vcpu->arch.shared->msr & MSR_PR); 369 370 if (priority == BOOKE_IRQPRIO_EXTERNAL_LEVEL) { 371 priority = BOOKE_IRQPRIO_EXTERNAL; 372 keep_irq = true; 373 } 374 375 if ((priority == BOOKE_IRQPRIO_EXTERNAL) && vcpu->arch.epr_flags) 376 update_epr = true; 377 378 switch (priority) { 379 case BOOKE_IRQPRIO_DTLB_MISS: 380 case BOOKE_IRQPRIO_DATA_STORAGE: 381 case BOOKE_IRQPRIO_ALIGNMENT: 382 update_dear = true; 383 /* fall through */ 384 case BOOKE_IRQPRIO_INST_STORAGE: 385 case BOOKE_IRQPRIO_PROGRAM: 386 update_esr = true; 387 /* fall through */ 388 case BOOKE_IRQPRIO_ITLB_MISS: 389 case BOOKE_IRQPRIO_SYSCALL: 390 case BOOKE_IRQPRIO_FP_UNAVAIL: 391 case BOOKE_IRQPRIO_SPE_UNAVAIL: 392 case BOOKE_IRQPRIO_SPE_FP_DATA: 393 case BOOKE_IRQPRIO_SPE_FP_ROUND: 394 case BOOKE_IRQPRIO_AP_UNAVAIL: 395 allowed = 1; 396 msr_mask = MSR_CE | MSR_ME | MSR_DE; 397 int_class = INT_CLASS_NONCRIT; 398 break; 399 case BOOKE_IRQPRIO_WATCHDOG: 400 case BOOKE_IRQPRIO_CRITICAL: 401 case BOOKE_IRQPRIO_DBELL_CRIT: 402 allowed = vcpu->arch.shared->msr & MSR_CE; 403 allowed = allowed && !crit; 404 msr_mask = MSR_ME; 405 int_class = INT_CLASS_CRIT; 406 break; 407 case BOOKE_IRQPRIO_MACHINE_CHECK: 408 allowed = vcpu->arch.shared->msr & MSR_ME; 409 allowed = allowed && !crit; 410 int_class = INT_CLASS_MC; 411 break; 412 case BOOKE_IRQPRIO_DECREMENTER: 413 case BOOKE_IRQPRIO_FIT: 414 keep_irq = true; 415 /* fall through */ 416 case BOOKE_IRQPRIO_EXTERNAL: 417 case BOOKE_IRQPRIO_DBELL: 418 allowed = vcpu->arch.shared->msr & MSR_EE; 419 allowed = allowed && !crit; 420 msr_mask = MSR_CE | MSR_ME | MSR_DE; 421 int_class = INT_CLASS_NONCRIT; 422 break; 423 case BOOKE_IRQPRIO_DEBUG: 424 allowed = vcpu->arch.shared->msr & MSR_DE; 425 allowed = allowed && !crit; 426 msr_mask = MSR_ME; 427 int_class = INT_CLASS_CRIT; 428 break; 429 } 430 431 if (allowed) { 432 switch (int_class) { 433 case INT_CLASS_NONCRIT: 434 set_guest_srr(vcpu, vcpu->arch.pc, 435 vcpu->arch.shared->msr); 436 break; 437 case INT_CLASS_CRIT: 438 set_guest_csrr(vcpu, vcpu->arch.pc, 439 vcpu->arch.shared->msr); 440 break; 441 case INT_CLASS_DBG: 442 set_guest_dsrr(vcpu, vcpu->arch.pc, 443 vcpu->arch.shared->msr); 444 break; 445 case INT_CLASS_MC: 446 set_guest_mcsrr(vcpu, vcpu->arch.pc, 447 vcpu->arch.shared->msr); 448 break; 449 } 450 451 vcpu->arch.pc = vcpu->arch.ivpr | vcpu->arch.ivor[priority]; 452 if (update_esr == true) 453 set_guest_esr(vcpu, vcpu->arch.queued_esr); 454 if (update_dear == true) 455 set_guest_dear(vcpu, vcpu->arch.queued_dear); 456 if (update_epr == true) { 457 if (vcpu->arch.epr_flags & KVMPPC_EPR_USER) 458 kvm_make_request(KVM_REQ_EPR_EXIT, vcpu); 459 else if (vcpu->arch.epr_flags & KVMPPC_EPR_KERNEL) { 460 BUG_ON(vcpu->arch.irq_type != KVMPPC_IRQ_MPIC); 461 kvmppc_mpic_set_epr(vcpu); 462 } 463 } 464 465 new_msr &= msr_mask; 466 #if defined(CONFIG_64BIT) 467 if (vcpu->arch.epcr & SPRN_EPCR_ICM) 468 new_msr |= MSR_CM; 469 #endif 470 kvmppc_set_msr(vcpu, new_msr); 471 472 if (!keep_irq) 473 clear_bit(priority, &vcpu->arch.pending_exceptions); 474 } 475 476 #ifdef CONFIG_KVM_BOOKE_HV 477 /* 478 * If an interrupt is pending but masked, raise a guest doorbell 479 * so that we are notified when the guest enables the relevant 480 * MSR bit. 481 */ 482 if (vcpu->arch.pending_exceptions & BOOKE_IRQMASK_EE) 483 kvmppc_set_pending_interrupt(vcpu, INT_CLASS_NONCRIT); 484 if (vcpu->arch.pending_exceptions & BOOKE_IRQMASK_CE) 485 kvmppc_set_pending_interrupt(vcpu, INT_CLASS_CRIT); 486 if (vcpu->arch.pending_exceptions & BOOKE_IRQPRIO_MACHINE_CHECK) 487 kvmppc_set_pending_interrupt(vcpu, INT_CLASS_MC); 488 #endif 489 490 return allowed; 491 } 492 493 /* 494 * Return the number of jiffies until the next timeout. If the timeout is 495 * longer than the NEXT_TIMER_MAX_DELTA, then return NEXT_TIMER_MAX_DELTA 496 * because the larger value can break the timer APIs. 497 */ 498 static unsigned long watchdog_next_timeout(struct kvm_vcpu *vcpu) 499 { 500 u64 tb, wdt_tb, wdt_ticks = 0; 501 u64 nr_jiffies = 0; 502 u32 period = TCR_GET_WP(vcpu->arch.tcr); 503 504 wdt_tb = 1ULL << (63 - period); 505 tb = get_tb(); 506 /* 507 * The watchdog timeout will hapeen when TB bit corresponding 508 * to watchdog will toggle from 0 to 1. 509 */ 510 if (tb & wdt_tb) 511 wdt_ticks = wdt_tb; 512 513 wdt_ticks += wdt_tb - (tb & (wdt_tb - 1)); 514 515 /* Convert timebase ticks to jiffies */ 516 nr_jiffies = wdt_ticks; 517 518 if (do_div(nr_jiffies, tb_ticks_per_jiffy)) 519 nr_jiffies++; 520 521 return min_t(unsigned long long, nr_jiffies, NEXT_TIMER_MAX_DELTA); 522 } 523 524 static void arm_next_watchdog(struct kvm_vcpu *vcpu) 525 { 526 unsigned long nr_jiffies; 527 unsigned long flags; 528 529 /* 530 * If TSR_ENW and TSR_WIS are not set then no need to exit to 531 * userspace, so clear the KVM_REQ_WATCHDOG request. 532 */ 533 if ((vcpu->arch.tsr & (TSR_ENW | TSR_WIS)) != (TSR_ENW | TSR_WIS)) 534 clear_bit(KVM_REQ_WATCHDOG, &vcpu->requests); 535 536 spin_lock_irqsave(&vcpu->arch.wdt_lock, flags); 537 nr_jiffies = watchdog_next_timeout(vcpu); 538 /* 539 * If the number of jiffies of watchdog timer >= NEXT_TIMER_MAX_DELTA 540 * then do not run the watchdog timer as this can break timer APIs. 541 */ 542 if (nr_jiffies < NEXT_TIMER_MAX_DELTA) 543 mod_timer(&vcpu->arch.wdt_timer, jiffies + nr_jiffies); 544 else 545 del_timer(&vcpu->arch.wdt_timer); 546 spin_unlock_irqrestore(&vcpu->arch.wdt_lock, flags); 547 } 548 549 void kvmppc_watchdog_func(unsigned long data) 550 { 551 struct kvm_vcpu *vcpu = (struct kvm_vcpu *)data; 552 u32 tsr, new_tsr; 553 int final; 554 555 do { 556 new_tsr = tsr = vcpu->arch.tsr; 557 final = 0; 558 559 /* Time out event */ 560 if (tsr & TSR_ENW) { 561 if (tsr & TSR_WIS) 562 final = 1; 563 else 564 new_tsr = tsr | TSR_WIS; 565 } else { 566 new_tsr = tsr | TSR_ENW; 567 } 568 } while (cmpxchg(&vcpu->arch.tsr, tsr, new_tsr) != tsr); 569 570 if (new_tsr & TSR_WIS) { 571 smp_wmb(); 572 kvm_make_request(KVM_REQ_PENDING_TIMER, vcpu); 573 kvm_vcpu_kick(vcpu); 574 } 575 576 /* 577 * If this is final watchdog expiry and some action is required 578 * then exit to userspace. 579 */ 580 if (final && (vcpu->arch.tcr & TCR_WRC_MASK) && 581 vcpu->arch.watchdog_enabled) { 582 smp_wmb(); 583 kvm_make_request(KVM_REQ_WATCHDOG, vcpu); 584 kvm_vcpu_kick(vcpu); 585 } 586 587 /* 588 * Stop running the watchdog timer after final expiration to 589 * prevent the host from being flooded with timers if the 590 * guest sets a short period. 591 * Timers will resume when TSR/TCR is updated next time. 592 */ 593 if (!final) 594 arm_next_watchdog(vcpu); 595 } 596 597 static void update_timer_ints(struct kvm_vcpu *vcpu) 598 { 599 if ((vcpu->arch.tcr & TCR_DIE) && (vcpu->arch.tsr & TSR_DIS)) 600 kvmppc_core_queue_dec(vcpu); 601 else 602 kvmppc_core_dequeue_dec(vcpu); 603 604 if ((vcpu->arch.tcr & TCR_WIE) && (vcpu->arch.tsr & TSR_WIS)) 605 kvmppc_core_queue_watchdog(vcpu); 606 else 607 kvmppc_core_dequeue_watchdog(vcpu); 608 } 609 610 static void kvmppc_core_check_exceptions(struct kvm_vcpu *vcpu) 611 { 612 unsigned long *pending = &vcpu->arch.pending_exceptions; 613 unsigned int priority; 614 615 priority = __ffs(*pending); 616 while (priority < BOOKE_IRQPRIO_MAX) { 617 if (kvmppc_booke_irqprio_deliver(vcpu, priority)) 618 break; 619 620 priority = find_next_bit(pending, 621 BITS_PER_BYTE * sizeof(*pending), 622 priority + 1); 623 } 624 625 /* Tell the guest about our interrupt status */ 626 vcpu->arch.shared->int_pending = !!*pending; 627 } 628 629 /* Check pending exceptions and deliver one, if possible. */ 630 int kvmppc_core_prepare_to_enter(struct kvm_vcpu *vcpu) 631 { 632 int r = 0; 633 WARN_ON_ONCE(!irqs_disabled()); 634 635 kvmppc_core_check_exceptions(vcpu); 636 637 if (vcpu->requests) { 638 /* Exception delivery raised request; start over */ 639 return 1; 640 } 641 642 if (vcpu->arch.shared->msr & MSR_WE) { 643 local_irq_enable(); 644 kvm_vcpu_block(vcpu); 645 clear_bit(KVM_REQ_UNHALT, &vcpu->requests); 646 local_irq_disable(); 647 648 kvmppc_set_exit_type(vcpu, EMULATED_MTMSRWE_EXITS); 649 r = 1; 650 }; 651 652 return r; 653 } 654 655 int kvmppc_core_check_requests(struct kvm_vcpu *vcpu) 656 { 657 int r = 1; /* Indicate we want to get back into the guest */ 658 659 if (kvm_check_request(KVM_REQ_PENDING_TIMER, vcpu)) 660 update_timer_ints(vcpu); 661 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC) 662 if (kvm_check_request(KVM_REQ_TLB_FLUSH, vcpu)) 663 kvmppc_core_flush_tlb(vcpu); 664 #endif 665 666 if (kvm_check_request(KVM_REQ_WATCHDOG, vcpu)) { 667 vcpu->run->exit_reason = KVM_EXIT_WATCHDOG; 668 r = 0; 669 } 670 671 if (kvm_check_request(KVM_REQ_EPR_EXIT, vcpu)) { 672 vcpu->run->epr.epr = 0; 673 vcpu->arch.epr_needed = true; 674 vcpu->run->exit_reason = KVM_EXIT_EPR; 675 r = 0; 676 } 677 678 return r; 679 } 680 681 int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu) 682 { 683 int ret, s; 684 struct debug_reg debug; 685 #ifdef CONFIG_PPC_FPU 686 struct thread_fp_state fp; 687 int fpexc_mode; 688 #endif 689 690 if (!vcpu->arch.sane) { 691 kvm_run->exit_reason = KVM_EXIT_INTERNAL_ERROR; 692 return -EINVAL; 693 } 694 695 local_irq_disable(); 696 s = kvmppc_prepare_to_enter(vcpu); 697 if (s <= 0) { 698 local_irq_enable(); 699 ret = s; 700 goto out; 701 } 702 703 #ifdef CONFIG_PPC_FPU 704 /* Save userspace FPU state in stack */ 705 enable_kernel_fp(); 706 fp = current->thread.fp_state; 707 fpexc_mode = current->thread.fpexc_mode; 708 709 /* Restore guest FPU state to thread */ 710 memcpy(current->thread.fp_state.fpr, vcpu->arch.fpr, 711 sizeof(vcpu->arch.fpr)); 712 current->thread.fp_state.fpscr = vcpu->arch.fpscr; 713 714 /* 715 * Since we can't trap on MSR_FP in GS-mode, we consider the guest 716 * as always using the FPU. Kernel usage of FP (via 717 * enable_kernel_fp()) in this thread must not occur while 718 * vcpu->fpu_active is set. 719 */ 720 vcpu->fpu_active = 1; 721 722 kvmppc_load_guest_fp(vcpu); 723 #endif 724 725 /* Switch to guest debug context */ 726 debug = vcpu->arch.shadow_dbg_reg; 727 switch_booke_debug_regs(&debug); 728 debug = current->thread.debug; 729 current->thread.debug = vcpu->arch.shadow_dbg_reg; 730 731 kvmppc_fix_ee_before_entry(); 732 733 ret = __kvmppc_vcpu_run(kvm_run, vcpu); 734 735 /* No need for kvm_guest_exit. It's done in handle_exit. 736 We also get here with interrupts enabled. */ 737 738 /* Switch back to user space debug context */ 739 switch_booke_debug_regs(&debug); 740 current->thread.debug = debug; 741 742 #ifdef CONFIG_PPC_FPU 743 kvmppc_save_guest_fp(vcpu); 744 745 vcpu->fpu_active = 0; 746 747 /* Save guest FPU state from thread */ 748 memcpy(vcpu->arch.fpr, current->thread.fp_state.fpr, 749 sizeof(vcpu->arch.fpr)); 750 vcpu->arch.fpscr = current->thread.fp_state.fpscr; 751 752 /* Restore userspace FPU state from stack */ 753 current->thread.fp_state = fp; 754 current->thread.fpexc_mode = fpexc_mode; 755 #endif 756 757 out: 758 vcpu->mode = OUTSIDE_GUEST_MODE; 759 return ret; 760 } 761 762 static int emulation_exit(struct kvm_run *run, struct kvm_vcpu *vcpu) 763 { 764 enum emulation_result er; 765 766 er = kvmppc_emulate_instruction(run, vcpu); 767 switch (er) { 768 case EMULATE_DONE: 769 /* don't overwrite subtypes, just account kvm_stats */ 770 kvmppc_account_exit_stat(vcpu, EMULATED_INST_EXITS); 771 /* Future optimization: only reload non-volatiles if 772 * they were actually modified by emulation. */ 773 return RESUME_GUEST_NV; 774 775 case EMULATE_DO_DCR: 776 run->exit_reason = KVM_EXIT_DCR; 777 return RESUME_HOST; 778 779 case EMULATE_FAIL: 780 printk(KERN_CRIT "%s: emulation at %lx failed (%08x)\n", 781 __func__, vcpu->arch.pc, vcpu->arch.last_inst); 782 /* For debugging, encode the failing instruction and 783 * report it to userspace. */ 784 run->hw.hardware_exit_reason = ~0ULL << 32; 785 run->hw.hardware_exit_reason |= vcpu->arch.last_inst; 786 kvmppc_core_queue_program(vcpu, ESR_PIL); 787 return RESUME_HOST; 788 789 case EMULATE_EXIT_USER: 790 return RESUME_HOST; 791 792 default: 793 BUG(); 794 } 795 } 796 797 static int kvmppc_handle_debug(struct kvm_run *run, struct kvm_vcpu *vcpu) 798 { 799 struct debug_reg *dbg_reg = &(vcpu->arch.shadow_dbg_reg); 800 u32 dbsr = vcpu->arch.dbsr; 801 802 run->debug.arch.status = 0; 803 run->debug.arch.address = vcpu->arch.pc; 804 805 if (dbsr & (DBSR_IAC1 | DBSR_IAC2 | DBSR_IAC3 | DBSR_IAC4)) { 806 run->debug.arch.status |= KVMPPC_DEBUG_BREAKPOINT; 807 } else { 808 if (dbsr & (DBSR_DAC1W | DBSR_DAC2W)) 809 run->debug.arch.status |= KVMPPC_DEBUG_WATCH_WRITE; 810 else if (dbsr & (DBSR_DAC1R | DBSR_DAC2R)) 811 run->debug.arch.status |= KVMPPC_DEBUG_WATCH_READ; 812 if (dbsr & (DBSR_DAC1R | DBSR_DAC1W)) 813 run->debug.arch.address = dbg_reg->dac1; 814 else if (dbsr & (DBSR_DAC2R | DBSR_DAC2W)) 815 run->debug.arch.address = dbg_reg->dac2; 816 } 817 818 return RESUME_HOST; 819 } 820 821 static void kvmppc_fill_pt_regs(struct pt_regs *regs) 822 { 823 ulong r1, ip, msr, lr; 824 825 asm("mr %0, 1" : "=r"(r1)); 826 asm("mflr %0" : "=r"(lr)); 827 asm("mfmsr %0" : "=r"(msr)); 828 asm("bl 1f; 1: mflr %0" : "=r"(ip)); 829 830 memset(regs, 0, sizeof(*regs)); 831 regs->gpr[1] = r1; 832 regs->nip = ip; 833 regs->msr = msr; 834 regs->link = lr; 835 } 836 837 /* 838 * For interrupts needed to be handled by host interrupt handlers, 839 * corresponding host handler are called from here in similar way 840 * (but not exact) as they are called from low level handler 841 * (such as from arch/powerpc/kernel/head_fsl_booke.S). 842 */ 843 static void kvmppc_restart_interrupt(struct kvm_vcpu *vcpu, 844 unsigned int exit_nr) 845 { 846 struct pt_regs regs; 847 848 switch (exit_nr) { 849 case BOOKE_INTERRUPT_EXTERNAL: 850 kvmppc_fill_pt_regs(®s); 851 do_IRQ(®s); 852 break; 853 case BOOKE_INTERRUPT_DECREMENTER: 854 kvmppc_fill_pt_regs(®s); 855 timer_interrupt(®s); 856 break; 857 #if defined(CONFIG_PPC_DOORBELL) 858 case BOOKE_INTERRUPT_DOORBELL: 859 kvmppc_fill_pt_regs(®s); 860 doorbell_exception(®s); 861 break; 862 #endif 863 case BOOKE_INTERRUPT_MACHINE_CHECK: 864 /* FIXME */ 865 break; 866 case BOOKE_INTERRUPT_PERFORMANCE_MONITOR: 867 kvmppc_fill_pt_regs(®s); 868 performance_monitor_exception(®s); 869 break; 870 case BOOKE_INTERRUPT_WATCHDOG: 871 kvmppc_fill_pt_regs(®s); 872 #ifdef CONFIG_BOOKE_WDT 873 WatchdogException(®s); 874 #else 875 unknown_exception(®s); 876 #endif 877 break; 878 case BOOKE_INTERRUPT_CRITICAL: 879 unknown_exception(®s); 880 break; 881 case BOOKE_INTERRUPT_DEBUG: 882 /* Save DBSR before preemption is enabled */ 883 vcpu->arch.dbsr = mfspr(SPRN_DBSR); 884 kvmppc_clear_dbsr(); 885 break; 886 } 887 } 888 889 /** 890 * kvmppc_handle_exit 891 * 892 * Return value is in the form (errcode<<2 | RESUME_FLAG_HOST | RESUME_FLAG_NV) 893 */ 894 int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu, 895 unsigned int exit_nr) 896 { 897 int r = RESUME_HOST; 898 int s; 899 int idx; 900 901 #ifdef CONFIG_PPC64 902 WARN_ON(local_paca->irq_happened != 0); 903 #endif 904 905 /* 906 * We enter with interrupts disabled in hardware, but 907 * we need to call hard_irq_disable anyway to ensure that 908 * the software state is kept in sync. 909 */ 910 hard_irq_disable(); 911 912 /* update before a new last_exit_type is rewritten */ 913 kvmppc_update_timing_stats(vcpu); 914 915 /* restart interrupts if they were meant for the host */ 916 kvmppc_restart_interrupt(vcpu, exit_nr); 917 918 local_irq_enable(); 919 920 trace_kvm_exit(exit_nr, vcpu); 921 kvm_guest_exit(); 922 923 run->exit_reason = KVM_EXIT_UNKNOWN; 924 run->ready_for_interrupt_injection = 1; 925 926 switch (exit_nr) { 927 case BOOKE_INTERRUPT_MACHINE_CHECK: 928 printk("MACHINE CHECK: %lx\n", mfspr(SPRN_MCSR)); 929 kvmppc_dump_vcpu(vcpu); 930 /* For debugging, send invalid exit reason to user space */ 931 run->hw.hardware_exit_reason = ~1ULL << 32; 932 run->hw.hardware_exit_reason |= mfspr(SPRN_MCSR); 933 r = RESUME_HOST; 934 break; 935 936 case BOOKE_INTERRUPT_EXTERNAL: 937 kvmppc_account_exit(vcpu, EXT_INTR_EXITS); 938 r = RESUME_GUEST; 939 break; 940 941 case BOOKE_INTERRUPT_DECREMENTER: 942 kvmppc_account_exit(vcpu, DEC_EXITS); 943 r = RESUME_GUEST; 944 break; 945 946 case BOOKE_INTERRUPT_WATCHDOG: 947 r = RESUME_GUEST; 948 break; 949 950 case BOOKE_INTERRUPT_DOORBELL: 951 kvmppc_account_exit(vcpu, DBELL_EXITS); 952 r = RESUME_GUEST; 953 break; 954 955 case BOOKE_INTERRUPT_GUEST_DBELL_CRIT: 956 kvmppc_account_exit(vcpu, GDBELL_EXITS); 957 958 /* 959 * We are here because there is a pending guest interrupt 960 * which could not be delivered as MSR_CE or MSR_ME was not 961 * set. Once we break from here we will retry delivery. 962 */ 963 r = RESUME_GUEST; 964 break; 965 966 case BOOKE_INTERRUPT_GUEST_DBELL: 967 kvmppc_account_exit(vcpu, GDBELL_EXITS); 968 969 /* 970 * We are here because there is a pending guest interrupt 971 * which could not be delivered as MSR_EE was not set. Once 972 * we break from here we will retry delivery. 973 */ 974 r = RESUME_GUEST; 975 break; 976 977 case BOOKE_INTERRUPT_PERFORMANCE_MONITOR: 978 r = RESUME_GUEST; 979 break; 980 981 case BOOKE_INTERRUPT_HV_PRIV: 982 r = emulation_exit(run, vcpu); 983 break; 984 985 case BOOKE_INTERRUPT_PROGRAM: 986 if (vcpu->arch.shared->msr & (MSR_PR | MSR_GS)) { 987 /* 988 * Program traps generated by user-level software must 989 * be handled by the guest kernel. 990 * 991 * In GS mode, hypervisor privileged instructions trap 992 * on BOOKE_INTERRUPT_HV_PRIV, not here, so these are 993 * actual program interrupts, handled by the guest. 994 */ 995 kvmppc_core_queue_program(vcpu, vcpu->arch.fault_esr); 996 r = RESUME_GUEST; 997 kvmppc_account_exit(vcpu, USR_PR_INST); 998 break; 999 } 1000 1001 r = emulation_exit(run, vcpu); 1002 break; 1003 1004 case BOOKE_INTERRUPT_FP_UNAVAIL: 1005 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_FP_UNAVAIL); 1006 kvmppc_account_exit(vcpu, FP_UNAVAIL); 1007 r = RESUME_GUEST; 1008 break; 1009 1010 #ifdef CONFIG_SPE 1011 case BOOKE_INTERRUPT_SPE_UNAVAIL: { 1012 if (vcpu->arch.shared->msr & MSR_SPE) 1013 kvmppc_vcpu_enable_spe(vcpu); 1014 else 1015 kvmppc_booke_queue_irqprio(vcpu, 1016 BOOKE_IRQPRIO_SPE_UNAVAIL); 1017 r = RESUME_GUEST; 1018 break; 1019 } 1020 1021 case BOOKE_INTERRUPT_SPE_FP_DATA: 1022 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SPE_FP_DATA); 1023 r = RESUME_GUEST; 1024 break; 1025 1026 case BOOKE_INTERRUPT_SPE_FP_ROUND: 1027 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SPE_FP_ROUND); 1028 r = RESUME_GUEST; 1029 break; 1030 #else 1031 case BOOKE_INTERRUPT_SPE_UNAVAIL: 1032 /* 1033 * Guest wants SPE, but host kernel doesn't support it. Send 1034 * an "unimplemented operation" program check to the guest. 1035 */ 1036 kvmppc_core_queue_program(vcpu, ESR_PUO | ESR_SPV); 1037 r = RESUME_GUEST; 1038 break; 1039 1040 /* 1041 * These really should never happen without CONFIG_SPE, 1042 * as we should never enable the real MSR[SPE] in the guest. 1043 */ 1044 case BOOKE_INTERRUPT_SPE_FP_DATA: 1045 case BOOKE_INTERRUPT_SPE_FP_ROUND: 1046 printk(KERN_CRIT "%s: unexpected SPE interrupt %u at %08lx\n", 1047 __func__, exit_nr, vcpu->arch.pc); 1048 run->hw.hardware_exit_reason = exit_nr; 1049 r = RESUME_HOST; 1050 break; 1051 #endif 1052 1053 case BOOKE_INTERRUPT_DATA_STORAGE: 1054 kvmppc_core_queue_data_storage(vcpu, vcpu->arch.fault_dear, 1055 vcpu->arch.fault_esr); 1056 kvmppc_account_exit(vcpu, DSI_EXITS); 1057 r = RESUME_GUEST; 1058 break; 1059 1060 case BOOKE_INTERRUPT_INST_STORAGE: 1061 kvmppc_core_queue_inst_storage(vcpu, vcpu->arch.fault_esr); 1062 kvmppc_account_exit(vcpu, ISI_EXITS); 1063 r = RESUME_GUEST; 1064 break; 1065 1066 case BOOKE_INTERRUPT_ALIGNMENT: 1067 kvmppc_core_queue_alignment(vcpu, vcpu->arch.fault_dear, 1068 vcpu->arch.fault_esr); 1069 r = RESUME_GUEST; 1070 break; 1071 1072 #ifdef CONFIG_KVM_BOOKE_HV 1073 case BOOKE_INTERRUPT_HV_SYSCALL: 1074 if (!(vcpu->arch.shared->msr & MSR_PR)) { 1075 kvmppc_set_gpr(vcpu, 3, kvmppc_kvm_pv(vcpu)); 1076 } else { 1077 /* 1078 * hcall from guest userspace -- send privileged 1079 * instruction program check. 1080 */ 1081 kvmppc_core_queue_program(vcpu, ESR_PPR); 1082 } 1083 1084 r = RESUME_GUEST; 1085 break; 1086 #else 1087 case BOOKE_INTERRUPT_SYSCALL: 1088 if (!(vcpu->arch.shared->msr & MSR_PR) && 1089 (((u32)kvmppc_get_gpr(vcpu, 0)) == KVM_SC_MAGIC_R0)) { 1090 /* KVM PV hypercalls */ 1091 kvmppc_set_gpr(vcpu, 3, kvmppc_kvm_pv(vcpu)); 1092 r = RESUME_GUEST; 1093 } else { 1094 /* Guest syscalls */ 1095 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SYSCALL); 1096 } 1097 kvmppc_account_exit(vcpu, SYSCALL_EXITS); 1098 r = RESUME_GUEST; 1099 break; 1100 #endif 1101 1102 case BOOKE_INTERRUPT_DTLB_MISS: { 1103 unsigned long eaddr = vcpu->arch.fault_dear; 1104 int gtlb_index; 1105 gpa_t gpaddr; 1106 gfn_t gfn; 1107 1108 #ifdef CONFIG_KVM_E500V2 1109 if (!(vcpu->arch.shared->msr & MSR_PR) && 1110 (eaddr & PAGE_MASK) == vcpu->arch.magic_page_ea) { 1111 kvmppc_map_magic(vcpu); 1112 kvmppc_account_exit(vcpu, DTLB_VIRT_MISS_EXITS); 1113 r = RESUME_GUEST; 1114 1115 break; 1116 } 1117 #endif 1118 1119 /* Check the guest TLB. */ 1120 gtlb_index = kvmppc_mmu_dtlb_index(vcpu, eaddr); 1121 if (gtlb_index < 0) { 1122 /* The guest didn't have a mapping for it. */ 1123 kvmppc_core_queue_dtlb_miss(vcpu, 1124 vcpu->arch.fault_dear, 1125 vcpu->arch.fault_esr); 1126 kvmppc_mmu_dtlb_miss(vcpu); 1127 kvmppc_account_exit(vcpu, DTLB_REAL_MISS_EXITS); 1128 r = RESUME_GUEST; 1129 break; 1130 } 1131 1132 idx = srcu_read_lock(&vcpu->kvm->srcu); 1133 1134 gpaddr = kvmppc_mmu_xlate(vcpu, gtlb_index, eaddr); 1135 gfn = gpaddr >> PAGE_SHIFT; 1136 1137 if (kvm_is_visible_gfn(vcpu->kvm, gfn)) { 1138 /* The guest TLB had a mapping, but the shadow TLB 1139 * didn't, and it is RAM. This could be because: 1140 * a) the entry is mapping the host kernel, or 1141 * b) the guest used a large mapping which we're faking 1142 * Either way, we need to satisfy the fault without 1143 * invoking the guest. */ 1144 kvmppc_mmu_map(vcpu, eaddr, gpaddr, gtlb_index); 1145 kvmppc_account_exit(vcpu, DTLB_VIRT_MISS_EXITS); 1146 r = RESUME_GUEST; 1147 } else { 1148 /* Guest has mapped and accessed a page which is not 1149 * actually RAM. */ 1150 vcpu->arch.paddr_accessed = gpaddr; 1151 vcpu->arch.vaddr_accessed = eaddr; 1152 r = kvmppc_emulate_mmio(run, vcpu); 1153 kvmppc_account_exit(vcpu, MMIO_EXITS); 1154 } 1155 1156 srcu_read_unlock(&vcpu->kvm->srcu, idx); 1157 break; 1158 } 1159 1160 case BOOKE_INTERRUPT_ITLB_MISS: { 1161 unsigned long eaddr = vcpu->arch.pc; 1162 gpa_t gpaddr; 1163 gfn_t gfn; 1164 int gtlb_index; 1165 1166 r = RESUME_GUEST; 1167 1168 /* Check the guest TLB. */ 1169 gtlb_index = kvmppc_mmu_itlb_index(vcpu, eaddr); 1170 if (gtlb_index < 0) { 1171 /* The guest didn't have a mapping for it. */ 1172 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ITLB_MISS); 1173 kvmppc_mmu_itlb_miss(vcpu); 1174 kvmppc_account_exit(vcpu, ITLB_REAL_MISS_EXITS); 1175 break; 1176 } 1177 1178 kvmppc_account_exit(vcpu, ITLB_VIRT_MISS_EXITS); 1179 1180 idx = srcu_read_lock(&vcpu->kvm->srcu); 1181 1182 gpaddr = kvmppc_mmu_xlate(vcpu, gtlb_index, eaddr); 1183 gfn = gpaddr >> PAGE_SHIFT; 1184 1185 if (kvm_is_visible_gfn(vcpu->kvm, gfn)) { 1186 /* The guest TLB had a mapping, but the shadow TLB 1187 * didn't. This could be because: 1188 * a) the entry is mapping the host kernel, or 1189 * b) the guest used a large mapping which we're faking 1190 * Either way, we need to satisfy the fault without 1191 * invoking the guest. */ 1192 kvmppc_mmu_map(vcpu, eaddr, gpaddr, gtlb_index); 1193 } else { 1194 /* Guest mapped and leaped at non-RAM! */ 1195 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_MACHINE_CHECK); 1196 } 1197 1198 srcu_read_unlock(&vcpu->kvm->srcu, idx); 1199 break; 1200 } 1201 1202 case BOOKE_INTERRUPT_DEBUG: { 1203 r = kvmppc_handle_debug(run, vcpu); 1204 if (r == RESUME_HOST) 1205 run->exit_reason = KVM_EXIT_DEBUG; 1206 kvmppc_account_exit(vcpu, DEBUG_EXITS); 1207 break; 1208 } 1209 1210 default: 1211 printk(KERN_EMERG "exit_nr %d\n", exit_nr); 1212 BUG(); 1213 } 1214 1215 /* 1216 * To avoid clobbering exit_reason, only check for signals if we 1217 * aren't already exiting to userspace for some other reason. 1218 */ 1219 if (!(r & RESUME_HOST)) { 1220 local_irq_disable(); 1221 s = kvmppc_prepare_to_enter(vcpu); 1222 if (s <= 0) { 1223 local_irq_enable(); 1224 r = (s << 2) | RESUME_HOST | (r & RESUME_FLAG_NV); 1225 } else { 1226 kvmppc_fix_ee_before_entry(); 1227 } 1228 } 1229 1230 return r; 1231 } 1232 1233 static void kvmppc_set_tsr(struct kvm_vcpu *vcpu, u32 new_tsr) 1234 { 1235 u32 old_tsr = vcpu->arch.tsr; 1236 1237 vcpu->arch.tsr = new_tsr; 1238 1239 if ((old_tsr ^ vcpu->arch.tsr) & (TSR_ENW | TSR_WIS)) 1240 arm_next_watchdog(vcpu); 1241 1242 update_timer_ints(vcpu); 1243 } 1244 1245 /* Initial guest state: 16MB mapping 0 -> 0, PC = 0, MSR = 0, R1 = 16MB */ 1246 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) 1247 { 1248 int i; 1249 int r; 1250 1251 vcpu->arch.pc = 0; 1252 vcpu->arch.shared->pir = vcpu->vcpu_id; 1253 kvmppc_set_gpr(vcpu, 1, (16<<20) - 8); /* -8 for the callee-save LR slot */ 1254 kvmppc_set_msr(vcpu, 0); 1255 1256 #ifndef CONFIG_KVM_BOOKE_HV 1257 vcpu->arch.shadow_msr = MSR_USER | MSR_IS | MSR_DS; 1258 vcpu->arch.shadow_pid = 1; 1259 vcpu->arch.shared->msr = 0; 1260 #endif 1261 1262 /* Eye-catching numbers so we know if the guest takes an interrupt 1263 * before it's programmed its own IVPR/IVORs. */ 1264 vcpu->arch.ivpr = 0x55550000; 1265 for (i = 0; i < BOOKE_IRQPRIO_MAX; i++) 1266 vcpu->arch.ivor[i] = 0x7700 | i * 4; 1267 1268 kvmppc_init_timing_stats(vcpu); 1269 1270 r = kvmppc_core_vcpu_setup(vcpu); 1271 kvmppc_sanity_check(vcpu); 1272 return r; 1273 } 1274 1275 int kvmppc_subarch_vcpu_init(struct kvm_vcpu *vcpu) 1276 { 1277 /* setup watchdog timer once */ 1278 spin_lock_init(&vcpu->arch.wdt_lock); 1279 setup_timer(&vcpu->arch.wdt_timer, kvmppc_watchdog_func, 1280 (unsigned long)vcpu); 1281 1282 return 0; 1283 } 1284 1285 void kvmppc_subarch_vcpu_uninit(struct kvm_vcpu *vcpu) 1286 { 1287 del_timer_sync(&vcpu->arch.wdt_timer); 1288 } 1289 1290 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) 1291 { 1292 int i; 1293 1294 regs->pc = vcpu->arch.pc; 1295 regs->cr = kvmppc_get_cr(vcpu); 1296 regs->ctr = vcpu->arch.ctr; 1297 regs->lr = vcpu->arch.lr; 1298 regs->xer = kvmppc_get_xer(vcpu); 1299 regs->msr = vcpu->arch.shared->msr; 1300 regs->srr0 = vcpu->arch.shared->srr0; 1301 regs->srr1 = vcpu->arch.shared->srr1; 1302 regs->pid = vcpu->arch.pid; 1303 regs->sprg0 = vcpu->arch.shared->sprg0; 1304 regs->sprg1 = vcpu->arch.shared->sprg1; 1305 regs->sprg2 = vcpu->arch.shared->sprg2; 1306 regs->sprg3 = vcpu->arch.shared->sprg3; 1307 regs->sprg4 = vcpu->arch.shared->sprg4; 1308 regs->sprg5 = vcpu->arch.shared->sprg5; 1309 regs->sprg6 = vcpu->arch.shared->sprg6; 1310 regs->sprg7 = vcpu->arch.shared->sprg7; 1311 1312 for (i = 0; i < ARRAY_SIZE(regs->gpr); i++) 1313 regs->gpr[i] = kvmppc_get_gpr(vcpu, i); 1314 1315 return 0; 1316 } 1317 1318 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) 1319 { 1320 int i; 1321 1322 vcpu->arch.pc = regs->pc; 1323 kvmppc_set_cr(vcpu, regs->cr); 1324 vcpu->arch.ctr = regs->ctr; 1325 vcpu->arch.lr = regs->lr; 1326 kvmppc_set_xer(vcpu, regs->xer); 1327 kvmppc_set_msr(vcpu, regs->msr); 1328 vcpu->arch.shared->srr0 = regs->srr0; 1329 vcpu->arch.shared->srr1 = regs->srr1; 1330 kvmppc_set_pid(vcpu, regs->pid); 1331 vcpu->arch.shared->sprg0 = regs->sprg0; 1332 vcpu->arch.shared->sprg1 = regs->sprg1; 1333 vcpu->arch.shared->sprg2 = regs->sprg2; 1334 vcpu->arch.shared->sprg3 = regs->sprg3; 1335 vcpu->arch.shared->sprg4 = regs->sprg4; 1336 vcpu->arch.shared->sprg5 = regs->sprg5; 1337 vcpu->arch.shared->sprg6 = regs->sprg6; 1338 vcpu->arch.shared->sprg7 = regs->sprg7; 1339 1340 for (i = 0; i < ARRAY_SIZE(regs->gpr); i++) 1341 kvmppc_set_gpr(vcpu, i, regs->gpr[i]); 1342 1343 return 0; 1344 } 1345 1346 static void get_sregs_base(struct kvm_vcpu *vcpu, 1347 struct kvm_sregs *sregs) 1348 { 1349 u64 tb = get_tb(); 1350 1351 sregs->u.e.features |= KVM_SREGS_E_BASE; 1352 1353 sregs->u.e.csrr0 = vcpu->arch.csrr0; 1354 sregs->u.e.csrr1 = vcpu->arch.csrr1; 1355 sregs->u.e.mcsr = vcpu->arch.mcsr; 1356 sregs->u.e.esr = get_guest_esr(vcpu); 1357 sregs->u.e.dear = get_guest_dear(vcpu); 1358 sregs->u.e.tsr = vcpu->arch.tsr; 1359 sregs->u.e.tcr = vcpu->arch.tcr; 1360 sregs->u.e.dec = kvmppc_get_dec(vcpu, tb); 1361 sregs->u.e.tb = tb; 1362 sregs->u.e.vrsave = vcpu->arch.vrsave; 1363 } 1364 1365 static int set_sregs_base(struct kvm_vcpu *vcpu, 1366 struct kvm_sregs *sregs) 1367 { 1368 if (!(sregs->u.e.features & KVM_SREGS_E_BASE)) 1369 return 0; 1370 1371 vcpu->arch.csrr0 = sregs->u.e.csrr0; 1372 vcpu->arch.csrr1 = sregs->u.e.csrr1; 1373 vcpu->arch.mcsr = sregs->u.e.mcsr; 1374 set_guest_esr(vcpu, sregs->u.e.esr); 1375 set_guest_dear(vcpu, sregs->u.e.dear); 1376 vcpu->arch.vrsave = sregs->u.e.vrsave; 1377 kvmppc_set_tcr(vcpu, sregs->u.e.tcr); 1378 1379 if (sregs->u.e.update_special & KVM_SREGS_E_UPDATE_DEC) { 1380 vcpu->arch.dec = sregs->u.e.dec; 1381 kvmppc_emulate_dec(vcpu); 1382 } 1383 1384 if (sregs->u.e.update_special & KVM_SREGS_E_UPDATE_TSR) 1385 kvmppc_set_tsr(vcpu, sregs->u.e.tsr); 1386 1387 return 0; 1388 } 1389 1390 static void get_sregs_arch206(struct kvm_vcpu *vcpu, 1391 struct kvm_sregs *sregs) 1392 { 1393 sregs->u.e.features |= KVM_SREGS_E_ARCH206; 1394 1395 sregs->u.e.pir = vcpu->vcpu_id; 1396 sregs->u.e.mcsrr0 = vcpu->arch.mcsrr0; 1397 sregs->u.e.mcsrr1 = vcpu->arch.mcsrr1; 1398 sregs->u.e.decar = vcpu->arch.decar; 1399 sregs->u.e.ivpr = vcpu->arch.ivpr; 1400 } 1401 1402 static int set_sregs_arch206(struct kvm_vcpu *vcpu, 1403 struct kvm_sregs *sregs) 1404 { 1405 if (!(sregs->u.e.features & KVM_SREGS_E_ARCH206)) 1406 return 0; 1407 1408 if (sregs->u.e.pir != vcpu->vcpu_id) 1409 return -EINVAL; 1410 1411 vcpu->arch.mcsrr0 = sregs->u.e.mcsrr0; 1412 vcpu->arch.mcsrr1 = sregs->u.e.mcsrr1; 1413 vcpu->arch.decar = sregs->u.e.decar; 1414 vcpu->arch.ivpr = sregs->u.e.ivpr; 1415 1416 return 0; 1417 } 1418 1419 int kvmppc_get_sregs_ivor(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs) 1420 { 1421 sregs->u.e.features |= KVM_SREGS_E_IVOR; 1422 1423 sregs->u.e.ivor_low[0] = vcpu->arch.ivor[BOOKE_IRQPRIO_CRITICAL]; 1424 sregs->u.e.ivor_low[1] = vcpu->arch.ivor[BOOKE_IRQPRIO_MACHINE_CHECK]; 1425 sregs->u.e.ivor_low[2] = vcpu->arch.ivor[BOOKE_IRQPRIO_DATA_STORAGE]; 1426 sregs->u.e.ivor_low[3] = vcpu->arch.ivor[BOOKE_IRQPRIO_INST_STORAGE]; 1427 sregs->u.e.ivor_low[4] = vcpu->arch.ivor[BOOKE_IRQPRIO_EXTERNAL]; 1428 sregs->u.e.ivor_low[5] = vcpu->arch.ivor[BOOKE_IRQPRIO_ALIGNMENT]; 1429 sregs->u.e.ivor_low[6] = vcpu->arch.ivor[BOOKE_IRQPRIO_PROGRAM]; 1430 sregs->u.e.ivor_low[7] = vcpu->arch.ivor[BOOKE_IRQPRIO_FP_UNAVAIL]; 1431 sregs->u.e.ivor_low[8] = vcpu->arch.ivor[BOOKE_IRQPRIO_SYSCALL]; 1432 sregs->u.e.ivor_low[9] = vcpu->arch.ivor[BOOKE_IRQPRIO_AP_UNAVAIL]; 1433 sregs->u.e.ivor_low[10] = vcpu->arch.ivor[BOOKE_IRQPRIO_DECREMENTER]; 1434 sregs->u.e.ivor_low[11] = vcpu->arch.ivor[BOOKE_IRQPRIO_FIT]; 1435 sregs->u.e.ivor_low[12] = vcpu->arch.ivor[BOOKE_IRQPRIO_WATCHDOG]; 1436 sregs->u.e.ivor_low[13] = vcpu->arch.ivor[BOOKE_IRQPRIO_DTLB_MISS]; 1437 sregs->u.e.ivor_low[14] = vcpu->arch.ivor[BOOKE_IRQPRIO_ITLB_MISS]; 1438 sregs->u.e.ivor_low[15] = vcpu->arch.ivor[BOOKE_IRQPRIO_DEBUG]; 1439 return 0; 1440 } 1441 1442 int kvmppc_set_sregs_ivor(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs) 1443 { 1444 if (!(sregs->u.e.features & KVM_SREGS_E_IVOR)) 1445 return 0; 1446 1447 vcpu->arch.ivor[BOOKE_IRQPRIO_CRITICAL] = sregs->u.e.ivor_low[0]; 1448 vcpu->arch.ivor[BOOKE_IRQPRIO_MACHINE_CHECK] = sregs->u.e.ivor_low[1]; 1449 vcpu->arch.ivor[BOOKE_IRQPRIO_DATA_STORAGE] = sregs->u.e.ivor_low[2]; 1450 vcpu->arch.ivor[BOOKE_IRQPRIO_INST_STORAGE] = sregs->u.e.ivor_low[3]; 1451 vcpu->arch.ivor[BOOKE_IRQPRIO_EXTERNAL] = sregs->u.e.ivor_low[4]; 1452 vcpu->arch.ivor[BOOKE_IRQPRIO_ALIGNMENT] = sregs->u.e.ivor_low[5]; 1453 vcpu->arch.ivor[BOOKE_IRQPRIO_PROGRAM] = sregs->u.e.ivor_low[6]; 1454 vcpu->arch.ivor[BOOKE_IRQPRIO_FP_UNAVAIL] = sregs->u.e.ivor_low[7]; 1455 vcpu->arch.ivor[BOOKE_IRQPRIO_SYSCALL] = sregs->u.e.ivor_low[8]; 1456 vcpu->arch.ivor[BOOKE_IRQPRIO_AP_UNAVAIL] = sregs->u.e.ivor_low[9]; 1457 vcpu->arch.ivor[BOOKE_IRQPRIO_DECREMENTER] = sregs->u.e.ivor_low[10]; 1458 vcpu->arch.ivor[BOOKE_IRQPRIO_FIT] = sregs->u.e.ivor_low[11]; 1459 vcpu->arch.ivor[BOOKE_IRQPRIO_WATCHDOG] = sregs->u.e.ivor_low[12]; 1460 vcpu->arch.ivor[BOOKE_IRQPRIO_DTLB_MISS] = sregs->u.e.ivor_low[13]; 1461 vcpu->arch.ivor[BOOKE_IRQPRIO_ITLB_MISS] = sregs->u.e.ivor_low[14]; 1462 vcpu->arch.ivor[BOOKE_IRQPRIO_DEBUG] = sregs->u.e.ivor_low[15]; 1463 1464 return 0; 1465 } 1466 1467 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, 1468 struct kvm_sregs *sregs) 1469 { 1470 sregs->pvr = vcpu->arch.pvr; 1471 1472 get_sregs_base(vcpu, sregs); 1473 get_sregs_arch206(vcpu, sregs); 1474 return vcpu->kvm->arch.kvm_ops->get_sregs(vcpu, sregs); 1475 } 1476 1477 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, 1478 struct kvm_sregs *sregs) 1479 { 1480 int ret; 1481 1482 if (vcpu->arch.pvr != sregs->pvr) 1483 return -EINVAL; 1484 1485 ret = set_sregs_base(vcpu, sregs); 1486 if (ret < 0) 1487 return ret; 1488 1489 ret = set_sregs_arch206(vcpu, sregs); 1490 if (ret < 0) 1491 return ret; 1492 1493 return vcpu->kvm->arch.kvm_ops->set_sregs(vcpu, sregs); 1494 } 1495 1496 int kvm_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg) 1497 { 1498 int r = 0; 1499 union kvmppc_one_reg val; 1500 int size; 1501 1502 size = one_reg_size(reg->id); 1503 if (size > sizeof(val)) 1504 return -EINVAL; 1505 1506 switch (reg->id) { 1507 case KVM_REG_PPC_IAC1: 1508 val = get_reg_val(reg->id, vcpu->arch.dbg_reg.iac1); 1509 break; 1510 case KVM_REG_PPC_IAC2: 1511 val = get_reg_val(reg->id, vcpu->arch.dbg_reg.iac2); 1512 break; 1513 #if CONFIG_PPC_ADV_DEBUG_IACS > 2 1514 case KVM_REG_PPC_IAC3: 1515 val = get_reg_val(reg->id, vcpu->arch.dbg_reg.iac3); 1516 break; 1517 case KVM_REG_PPC_IAC4: 1518 val = get_reg_val(reg->id, vcpu->arch.dbg_reg.iac4); 1519 break; 1520 #endif 1521 case KVM_REG_PPC_DAC1: 1522 val = get_reg_val(reg->id, vcpu->arch.dbg_reg.dac1); 1523 break; 1524 case KVM_REG_PPC_DAC2: 1525 val = get_reg_val(reg->id, vcpu->arch.dbg_reg.dac2); 1526 break; 1527 case KVM_REG_PPC_EPR: { 1528 u32 epr = get_guest_epr(vcpu); 1529 val = get_reg_val(reg->id, epr); 1530 break; 1531 } 1532 #if defined(CONFIG_64BIT) 1533 case KVM_REG_PPC_EPCR: 1534 val = get_reg_val(reg->id, vcpu->arch.epcr); 1535 break; 1536 #endif 1537 case KVM_REG_PPC_TCR: 1538 val = get_reg_val(reg->id, vcpu->arch.tcr); 1539 break; 1540 case KVM_REG_PPC_TSR: 1541 val = get_reg_val(reg->id, vcpu->arch.tsr); 1542 break; 1543 case KVM_REG_PPC_DEBUG_INST: 1544 val = get_reg_val(reg->id, KVMPPC_INST_EHPRIV_DEBUG); 1545 break; 1546 case KVM_REG_PPC_VRSAVE: 1547 val = get_reg_val(reg->id, vcpu->arch.vrsave); 1548 break; 1549 default: 1550 r = vcpu->kvm->arch.kvm_ops->get_one_reg(vcpu, reg->id, &val); 1551 break; 1552 } 1553 1554 if (r) 1555 return r; 1556 1557 if (copy_to_user((char __user *)(unsigned long)reg->addr, &val, size)) 1558 r = -EFAULT; 1559 1560 return r; 1561 } 1562 1563 int kvm_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg) 1564 { 1565 int r = 0; 1566 union kvmppc_one_reg val; 1567 int size; 1568 1569 size = one_reg_size(reg->id); 1570 if (size > sizeof(val)) 1571 return -EINVAL; 1572 1573 if (copy_from_user(&val, (char __user *)(unsigned long)reg->addr, size)) 1574 return -EFAULT; 1575 1576 switch (reg->id) { 1577 case KVM_REG_PPC_IAC1: 1578 vcpu->arch.dbg_reg.iac1 = set_reg_val(reg->id, val); 1579 break; 1580 case KVM_REG_PPC_IAC2: 1581 vcpu->arch.dbg_reg.iac2 = set_reg_val(reg->id, val); 1582 break; 1583 #if CONFIG_PPC_ADV_DEBUG_IACS > 2 1584 case KVM_REG_PPC_IAC3: 1585 vcpu->arch.dbg_reg.iac3 = set_reg_val(reg->id, val); 1586 break; 1587 case KVM_REG_PPC_IAC4: 1588 vcpu->arch.dbg_reg.iac4 = set_reg_val(reg->id, val); 1589 break; 1590 #endif 1591 case KVM_REG_PPC_DAC1: 1592 vcpu->arch.dbg_reg.dac1 = set_reg_val(reg->id, val); 1593 break; 1594 case KVM_REG_PPC_DAC2: 1595 vcpu->arch.dbg_reg.dac2 = set_reg_val(reg->id, val); 1596 break; 1597 case KVM_REG_PPC_EPR: { 1598 u32 new_epr = set_reg_val(reg->id, val); 1599 kvmppc_set_epr(vcpu, new_epr); 1600 break; 1601 } 1602 #if defined(CONFIG_64BIT) 1603 case KVM_REG_PPC_EPCR: { 1604 u32 new_epcr = set_reg_val(reg->id, val); 1605 kvmppc_set_epcr(vcpu, new_epcr); 1606 break; 1607 } 1608 #endif 1609 case KVM_REG_PPC_OR_TSR: { 1610 u32 tsr_bits = set_reg_val(reg->id, val); 1611 kvmppc_set_tsr_bits(vcpu, tsr_bits); 1612 break; 1613 } 1614 case KVM_REG_PPC_CLEAR_TSR: { 1615 u32 tsr_bits = set_reg_val(reg->id, val); 1616 kvmppc_clr_tsr_bits(vcpu, tsr_bits); 1617 break; 1618 } 1619 case KVM_REG_PPC_TSR: { 1620 u32 tsr = set_reg_val(reg->id, val); 1621 kvmppc_set_tsr(vcpu, tsr); 1622 break; 1623 } 1624 case KVM_REG_PPC_TCR: { 1625 u32 tcr = set_reg_val(reg->id, val); 1626 kvmppc_set_tcr(vcpu, tcr); 1627 break; 1628 } 1629 case KVM_REG_PPC_VRSAVE: 1630 vcpu->arch.vrsave = set_reg_val(reg->id, val); 1631 break; 1632 default: 1633 r = vcpu->kvm->arch.kvm_ops->set_one_reg(vcpu, reg->id, &val); 1634 break; 1635 } 1636 1637 return r; 1638 } 1639 1640 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) 1641 { 1642 return -ENOTSUPP; 1643 } 1644 1645 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) 1646 { 1647 return -ENOTSUPP; 1648 } 1649 1650 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, 1651 struct kvm_translation *tr) 1652 { 1653 int r; 1654 1655 r = kvmppc_core_vcpu_translate(vcpu, tr); 1656 return r; 1657 } 1658 1659 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log) 1660 { 1661 return -ENOTSUPP; 1662 } 1663 1664 void kvmppc_core_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free, 1665 struct kvm_memory_slot *dont) 1666 { 1667 } 1668 1669 int kvmppc_core_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot, 1670 unsigned long npages) 1671 { 1672 return 0; 1673 } 1674 1675 int kvmppc_core_prepare_memory_region(struct kvm *kvm, 1676 struct kvm_memory_slot *memslot, 1677 struct kvm_userspace_memory_region *mem) 1678 { 1679 return 0; 1680 } 1681 1682 void kvmppc_core_commit_memory_region(struct kvm *kvm, 1683 struct kvm_userspace_memory_region *mem, 1684 const struct kvm_memory_slot *old) 1685 { 1686 } 1687 1688 void kvmppc_core_flush_memslot(struct kvm *kvm, struct kvm_memory_slot *memslot) 1689 { 1690 } 1691 1692 void kvmppc_set_epcr(struct kvm_vcpu *vcpu, u32 new_epcr) 1693 { 1694 #if defined(CONFIG_64BIT) 1695 vcpu->arch.epcr = new_epcr; 1696 #ifdef CONFIG_KVM_BOOKE_HV 1697 vcpu->arch.shadow_epcr &= ~SPRN_EPCR_GICM; 1698 if (vcpu->arch.epcr & SPRN_EPCR_ICM) 1699 vcpu->arch.shadow_epcr |= SPRN_EPCR_GICM; 1700 #endif 1701 #endif 1702 } 1703 1704 void kvmppc_set_tcr(struct kvm_vcpu *vcpu, u32 new_tcr) 1705 { 1706 vcpu->arch.tcr = new_tcr; 1707 arm_next_watchdog(vcpu); 1708 update_timer_ints(vcpu); 1709 } 1710 1711 void kvmppc_set_tsr_bits(struct kvm_vcpu *vcpu, u32 tsr_bits) 1712 { 1713 set_bits(tsr_bits, &vcpu->arch.tsr); 1714 smp_wmb(); 1715 kvm_make_request(KVM_REQ_PENDING_TIMER, vcpu); 1716 kvm_vcpu_kick(vcpu); 1717 } 1718 1719 void kvmppc_clr_tsr_bits(struct kvm_vcpu *vcpu, u32 tsr_bits) 1720 { 1721 clear_bits(tsr_bits, &vcpu->arch.tsr); 1722 1723 /* 1724 * We may have stopped the watchdog due to 1725 * being stuck on final expiration. 1726 */ 1727 if (tsr_bits & (TSR_ENW | TSR_WIS)) 1728 arm_next_watchdog(vcpu); 1729 1730 update_timer_ints(vcpu); 1731 } 1732 1733 void kvmppc_decrementer_func(unsigned long data) 1734 { 1735 struct kvm_vcpu *vcpu = (struct kvm_vcpu *)data; 1736 1737 if (vcpu->arch.tcr & TCR_ARE) { 1738 vcpu->arch.dec = vcpu->arch.decar; 1739 kvmppc_emulate_dec(vcpu); 1740 } 1741 1742 kvmppc_set_tsr_bits(vcpu, TSR_DIS); 1743 } 1744 1745 static int kvmppc_booke_add_breakpoint(struct debug_reg *dbg_reg, 1746 uint64_t addr, int index) 1747 { 1748 switch (index) { 1749 case 0: 1750 dbg_reg->dbcr0 |= DBCR0_IAC1; 1751 dbg_reg->iac1 = addr; 1752 break; 1753 case 1: 1754 dbg_reg->dbcr0 |= DBCR0_IAC2; 1755 dbg_reg->iac2 = addr; 1756 break; 1757 #if CONFIG_PPC_ADV_DEBUG_IACS > 2 1758 case 2: 1759 dbg_reg->dbcr0 |= DBCR0_IAC3; 1760 dbg_reg->iac3 = addr; 1761 break; 1762 case 3: 1763 dbg_reg->dbcr0 |= DBCR0_IAC4; 1764 dbg_reg->iac4 = addr; 1765 break; 1766 #endif 1767 default: 1768 return -EINVAL; 1769 } 1770 1771 dbg_reg->dbcr0 |= DBCR0_IDM; 1772 return 0; 1773 } 1774 1775 static int kvmppc_booke_add_watchpoint(struct debug_reg *dbg_reg, uint64_t addr, 1776 int type, int index) 1777 { 1778 switch (index) { 1779 case 0: 1780 if (type & KVMPPC_DEBUG_WATCH_READ) 1781 dbg_reg->dbcr0 |= DBCR0_DAC1R; 1782 if (type & KVMPPC_DEBUG_WATCH_WRITE) 1783 dbg_reg->dbcr0 |= DBCR0_DAC1W; 1784 dbg_reg->dac1 = addr; 1785 break; 1786 case 1: 1787 if (type & KVMPPC_DEBUG_WATCH_READ) 1788 dbg_reg->dbcr0 |= DBCR0_DAC2R; 1789 if (type & KVMPPC_DEBUG_WATCH_WRITE) 1790 dbg_reg->dbcr0 |= DBCR0_DAC2W; 1791 dbg_reg->dac2 = addr; 1792 break; 1793 default: 1794 return -EINVAL; 1795 } 1796 1797 dbg_reg->dbcr0 |= DBCR0_IDM; 1798 return 0; 1799 } 1800 void kvm_guest_protect_msr(struct kvm_vcpu *vcpu, ulong prot_bitmap, bool set) 1801 { 1802 /* XXX: Add similar MSR protection for BookE-PR */ 1803 #ifdef CONFIG_KVM_BOOKE_HV 1804 BUG_ON(prot_bitmap & ~(MSRP_UCLEP | MSRP_DEP | MSRP_PMMP)); 1805 if (set) { 1806 if (prot_bitmap & MSR_UCLE) 1807 vcpu->arch.shadow_msrp |= MSRP_UCLEP; 1808 if (prot_bitmap & MSR_DE) 1809 vcpu->arch.shadow_msrp |= MSRP_DEP; 1810 if (prot_bitmap & MSR_PMM) 1811 vcpu->arch.shadow_msrp |= MSRP_PMMP; 1812 } else { 1813 if (prot_bitmap & MSR_UCLE) 1814 vcpu->arch.shadow_msrp &= ~MSRP_UCLEP; 1815 if (prot_bitmap & MSR_DE) 1816 vcpu->arch.shadow_msrp &= ~MSRP_DEP; 1817 if (prot_bitmap & MSR_PMM) 1818 vcpu->arch.shadow_msrp &= ~MSRP_PMMP; 1819 } 1820 #endif 1821 } 1822 1823 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, 1824 struct kvm_guest_debug *dbg) 1825 { 1826 struct debug_reg *dbg_reg; 1827 int n, b = 0, w = 0; 1828 1829 if (!(dbg->control & KVM_GUESTDBG_ENABLE)) { 1830 vcpu->arch.shadow_dbg_reg.dbcr0 = 0; 1831 vcpu->guest_debug = 0; 1832 kvm_guest_protect_msr(vcpu, MSR_DE, false); 1833 return 0; 1834 } 1835 1836 kvm_guest_protect_msr(vcpu, MSR_DE, true); 1837 vcpu->guest_debug = dbg->control; 1838 vcpu->arch.shadow_dbg_reg.dbcr0 = 0; 1839 /* Set DBCR0_EDM in guest visible DBCR0 register. */ 1840 vcpu->arch.dbg_reg.dbcr0 = DBCR0_EDM; 1841 1842 if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) 1843 vcpu->arch.shadow_dbg_reg.dbcr0 |= DBCR0_IDM | DBCR0_IC; 1844 1845 /* Code below handles only HW breakpoints */ 1846 dbg_reg = &(vcpu->arch.shadow_dbg_reg); 1847 1848 #ifdef CONFIG_KVM_BOOKE_HV 1849 /* 1850 * On BookE-HV (e500mc) the guest is always executed with MSR.GS=1 1851 * DBCR1 and DBCR2 are set to trigger debug events when MSR.PR is 0 1852 */ 1853 dbg_reg->dbcr1 = 0; 1854 dbg_reg->dbcr2 = 0; 1855 #else 1856 /* 1857 * On BookE-PR (e500v2) the guest is always executed with MSR.PR=1 1858 * We set DBCR1 and DBCR2 to only trigger debug events when MSR.PR 1859 * is set. 1860 */ 1861 dbg_reg->dbcr1 = DBCR1_IAC1US | DBCR1_IAC2US | DBCR1_IAC3US | 1862 DBCR1_IAC4US; 1863 dbg_reg->dbcr2 = DBCR2_DAC1US | DBCR2_DAC2US; 1864 #endif 1865 1866 if (!(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)) 1867 return 0; 1868 1869 for (n = 0; n < (KVMPPC_BOOKE_IAC_NUM + KVMPPC_BOOKE_DAC_NUM); n++) { 1870 uint64_t addr = dbg->arch.bp[n].addr; 1871 uint32_t type = dbg->arch.bp[n].type; 1872 1873 if (type == KVMPPC_DEBUG_NONE) 1874 continue; 1875 1876 if (type & !(KVMPPC_DEBUG_WATCH_READ | 1877 KVMPPC_DEBUG_WATCH_WRITE | 1878 KVMPPC_DEBUG_BREAKPOINT)) 1879 return -EINVAL; 1880 1881 if (type & KVMPPC_DEBUG_BREAKPOINT) { 1882 /* Setting H/W breakpoint */ 1883 if (kvmppc_booke_add_breakpoint(dbg_reg, addr, b++)) 1884 return -EINVAL; 1885 } else { 1886 /* Setting H/W watchpoint */ 1887 if (kvmppc_booke_add_watchpoint(dbg_reg, addr, 1888 type, w++)) 1889 return -EINVAL; 1890 } 1891 } 1892 1893 return 0; 1894 } 1895 1896 void kvmppc_booke_vcpu_load(struct kvm_vcpu *vcpu, int cpu) 1897 { 1898 vcpu->cpu = smp_processor_id(); 1899 current->thread.kvm_vcpu = vcpu; 1900 } 1901 1902 void kvmppc_booke_vcpu_put(struct kvm_vcpu *vcpu) 1903 { 1904 current->thread.kvm_vcpu = NULL; 1905 vcpu->cpu = -1; 1906 1907 /* Clear pending debug event in DBSR */ 1908 kvmppc_clear_dbsr(); 1909 } 1910 1911 void kvmppc_mmu_destroy(struct kvm_vcpu *vcpu) 1912 { 1913 vcpu->kvm->arch.kvm_ops->mmu_destroy(vcpu); 1914 } 1915 1916 int kvmppc_core_init_vm(struct kvm *kvm) 1917 { 1918 return kvm->arch.kvm_ops->init_vm(kvm); 1919 } 1920 1921 struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm *kvm, unsigned int id) 1922 { 1923 return kvm->arch.kvm_ops->vcpu_create(kvm, id); 1924 } 1925 1926 void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu) 1927 { 1928 vcpu->kvm->arch.kvm_ops->vcpu_free(vcpu); 1929 } 1930 1931 void kvmppc_core_destroy_vm(struct kvm *kvm) 1932 { 1933 kvm->arch.kvm_ops->destroy_vm(kvm); 1934 } 1935 1936 void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu) 1937 { 1938 vcpu->kvm->arch.kvm_ops->vcpu_load(vcpu, cpu); 1939 } 1940 1941 void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu) 1942 { 1943 vcpu->kvm->arch.kvm_ops->vcpu_put(vcpu); 1944 } 1945 1946 int __init kvmppc_booke_init(void) 1947 { 1948 #ifndef CONFIG_KVM_BOOKE_HV 1949 unsigned long ivor[16]; 1950 unsigned long *handler = kvmppc_booke_handler_addr; 1951 unsigned long max_ivor = 0; 1952 unsigned long handler_len; 1953 int i; 1954 1955 /* We install our own exception handlers by hijacking IVPR. IVPR must 1956 * be 16-bit aligned, so we need a 64KB allocation. */ 1957 kvmppc_booke_handlers = __get_free_pages(GFP_KERNEL | __GFP_ZERO, 1958 VCPU_SIZE_ORDER); 1959 if (!kvmppc_booke_handlers) 1960 return -ENOMEM; 1961 1962 /* XXX make sure our handlers are smaller than Linux's */ 1963 1964 /* Copy our interrupt handlers to match host IVORs. That way we don't 1965 * have to swap the IVORs on every guest/host transition. */ 1966 ivor[0] = mfspr(SPRN_IVOR0); 1967 ivor[1] = mfspr(SPRN_IVOR1); 1968 ivor[2] = mfspr(SPRN_IVOR2); 1969 ivor[3] = mfspr(SPRN_IVOR3); 1970 ivor[4] = mfspr(SPRN_IVOR4); 1971 ivor[5] = mfspr(SPRN_IVOR5); 1972 ivor[6] = mfspr(SPRN_IVOR6); 1973 ivor[7] = mfspr(SPRN_IVOR7); 1974 ivor[8] = mfspr(SPRN_IVOR8); 1975 ivor[9] = mfspr(SPRN_IVOR9); 1976 ivor[10] = mfspr(SPRN_IVOR10); 1977 ivor[11] = mfspr(SPRN_IVOR11); 1978 ivor[12] = mfspr(SPRN_IVOR12); 1979 ivor[13] = mfspr(SPRN_IVOR13); 1980 ivor[14] = mfspr(SPRN_IVOR14); 1981 ivor[15] = mfspr(SPRN_IVOR15); 1982 1983 for (i = 0; i < 16; i++) { 1984 if (ivor[i] > max_ivor) 1985 max_ivor = i; 1986 1987 handler_len = handler[i + 1] - handler[i]; 1988 memcpy((void *)kvmppc_booke_handlers + ivor[i], 1989 (void *)handler[i], handler_len); 1990 } 1991 1992 handler_len = handler[max_ivor + 1] - handler[max_ivor]; 1993 flush_icache_range(kvmppc_booke_handlers, kvmppc_booke_handlers + 1994 ivor[max_ivor] + handler_len); 1995 #endif /* !BOOKE_HV */ 1996 return 0; 1997 } 1998 1999 void __exit kvmppc_booke_exit(void) 2000 { 2001 free_pages(kvmppc_booke_handlers, VCPU_SIZE_ORDER); 2002 kvm_exit(); 2003 } 2004