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 { "sig", VCPU_STAT(signal_exits) }, 55 { "itlb_r", VCPU_STAT(itlb_real_miss_exits) }, 56 { "itlb_v", VCPU_STAT(itlb_virt_miss_exits) }, 57 { "dtlb_r", VCPU_STAT(dtlb_real_miss_exits) }, 58 { "dtlb_v", VCPU_STAT(dtlb_virt_miss_exits) }, 59 { "sysc", VCPU_STAT(syscall_exits) }, 60 { "isi", VCPU_STAT(isi_exits) }, 61 { "dsi", VCPU_STAT(dsi_exits) }, 62 { "inst_emu", VCPU_STAT(emulated_inst_exits) }, 63 { "dec", VCPU_STAT(dec_exits) }, 64 { "ext_intr", VCPU_STAT(ext_intr_exits) }, 65 { "halt_successful_poll", VCPU_STAT(halt_successful_poll) }, 66 { "halt_attempted_poll", VCPU_STAT(halt_attempted_poll) }, 67 { "halt_poll_invalid", VCPU_STAT(halt_poll_invalid) }, 68 { "halt_wakeup", VCPU_STAT(halt_wakeup) }, 69 { "doorbell", VCPU_STAT(dbell_exits) }, 70 { "guest doorbell", VCPU_STAT(gdbell_exits) }, 71 { "remote_tlb_flush", VM_STAT(remote_tlb_flush) }, 72 { NULL } 73 }; 74 75 /* TODO: use vcpu_printf() */ 76 void kvmppc_dump_vcpu(struct kvm_vcpu *vcpu) 77 { 78 int i; 79 80 printk("pc: %08lx msr: %08llx\n", vcpu->arch.pc, vcpu->arch.shared->msr); 81 printk("lr: %08lx ctr: %08lx\n", vcpu->arch.lr, vcpu->arch.ctr); 82 printk("srr0: %08llx srr1: %08llx\n", vcpu->arch.shared->srr0, 83 vcpu->arch.shared->srr1); 84 85 printk("exceptions: %08lx\n", vcpu->arch.pending_exceptions); 86 87 for (i = 0; i < 32; i += 4) { 88 printk("gpr%02d: %08lx %08lx %08lx %08lx\n", i, 89 kvmppc_get_gpr(vcpu, i), 90 kvmppc_get_gpr(vcpu, i+1), 91 kvmppc_get_gpr(vcpu, i+2), 92 kvmppc_get_gpr(vcpu, i+3)); 93 } 94 } 95 96 #ifdef CONFIG_SPE 97 void kvmppc_vcpu_disable_spe(struct kvm_vcpu *vcpu) 98 { 99 preempt_disable(); 100 enable_kernel_spe(); 101 kvmppc_save_guest_spe(vcpu); 102 disable_kernel_spe(); 103 vcpu->arch.shadow_msr &= ~MSR_SPE; 104 preempt_enable(); 105 } 106 107 static void kvmppc_vcpu_enable_spe(struct kvm_vcpu *vcpu) 108 { 109 preempt_disable(); 110 enable_kernel_spe(); 111 kvmppc_load_guest_spe(vcpu); 112 disable_kernel_spe(); 113 vcpu->arch.shadow_msr |= MSR_SPE; 114 preempt_enable(); 115 } 116 117 static void kvmppc_vcpu_sync_spe(struct kvm_vcpu *vcpu) 118 { 119 if (vcpu->arch.shared->msr & MSR_SPE) { 120 if (!(vcpu->arch.shadow_msr & MSR_SPE)) 121 kvmppc_vcpu_enable_spe(vcpu); 122 } else if (vcpu->arch.shadow_msr & MSR_SPE) { 123 kvmppc_vcpu_disable_spe(vcpu); 124 } 125 } 126 #else 127 static void kvmppc_vcpu_sync_spe(struct kvm_vcpu *vcpu) 128 { 129 } 130 #endif 131 132 /* 133 * Load up guest vcpu FP state if it's needed. 134 * It also set the MSR_FP in thread so that host know 135 * we're holding FPU, and then host can help to save 136 * guest vcpu FP state if other threads require to use FPU. 137 * This simulates an FP unavailable fault. 138 * 139 * It requires to be called with preemption disabled. 140 */ 141 static inline void kvmppc_load_guest_fp(struct kvm_vcpu *vcpu) 142 { 143 #ifdef CONFIG_PPC_FPU 144 if (!(current->thread.regs->msr & MSR_FP)) { 145 enable_kernel_fp(); 146 load_fp_state(&vcpu->arch.fp); 147 disable_kernel_fp(); 148 current->thread.fp_save_area = &vcpu->arch.fp; 149 current->thread.regs->msr |= MSR_FP; 150 } 151 #endif 152 } 153 154 /* 155 * Save guest vcpu FP state into thread. 156 * It requires to be called with preemption disabled. 157 */ 158 static inline void kvmppc_save_guest_fp(struct kvm_vcpu *vcpu) 159 { 160 #ifdef CONFIG_PPC_FPU 161 if (current->thread.regs->msr & MSR_FP) 162 giveup_fpu(current); 163 current->thread.fp_save_area = NULL; 164 #endif 165 } 166 167 static void kvmppc_vcpu_sync_fpu(struct kvm_vcpu *vcpu) 168 { 169 #if defined(CONFIG_PPC_FPU) && !defined(CONFIG_KVM_BOOKE_HV) 170 /* We always treat the FP bit as enabled from the host 171 perspective, so only need to adjust the shadow MSR */ 172 vcpu->arch.shadow_msr &= ~MSR_FP; 173 vcpu->arch.shadow_msr |= vcpu->arch.shared->msr & MSR_FP; 174 #endif 175 } 176 177 /* 178 * Simulate AltiVec unavailable fault to load guest state 179 * from thread to AltiVec unit. 180 * It requires to be called with preemption disabled. 181 */ 182 static inline void kvmppc_load_guest_altivec(struct kvm_vcpu *vcpu) 183 { 184 #ifdef CONFIG_ALTIVEC 185 if (cpu_has_feature(CPU_FTR_ALTIVEC)) { 186 if (!(current->thread.regs->msr & MSR_VEC)) { 187 enable_kernel_altivec(); 188 load_vr_state(&vcpu->arch.vr); 189 disable_kernel_altivec(); 190 current->thread.vr_save_area = &vcpu->arch.vr; 191 current->thread.regs->msr |= MSR_VEC; 192 } 193 } 194 #endif 195 } 196 197 /* 198 * Save guest vcpu AltiVec state into thread. 199 * It requires to be called with preemption disabled. 200 */ 201 static inline void kvmppc_save_guest_altivec(struct kvm_vcpu *vcpu) 202 { 203 #ifdef CONFIG_ALTIVEC 204 if (cpu_has_feature(CPU_FTR_ALTIVEC)) { 205 if (current->thread.regs->msr & MSR_VEC) 206 giveup_altivec(current); 207 current->thread.vr_save_area = NULL; 208 } 209 #endif 210 } 211 212 static void kvmppc_vcpu_sync_debug(struct kvm_vcpu *vcpu) 213 { 214 /* Synchronize guest's desire to get debug interrupts into shadow MSR */ 215 #ifndef CONFIG_KVM_BOOKE_HV 216 vcpu->arch.shadow_msr &= ~MSR_DE; 217 vcpu->arch.shadow_msr |= vcpu->arch.shared->msr & MSR_DE; 218 #endif 219 220 /* Force enable debug interrupts when user space wants to debug */ 221 if (vcpu->guest_debug) { 222 #ifdef CONFIG_KVM_BOOKE_HV 223 /* 224 * Since there is no shadow MSR, sync MSR_DE into the guest 225 * visible MSR. 226 */ 227 vcpu->arch.shared->msr |= MSR_DE; 228 #else 229 vcpu->arch.shadow_msr |= MSR_DE; 230 vcpu->arch.shared->msr &= ~MSR_DE; 231 #endif 232 } 233 } 234 235 /* 236 * Helper function for "full" MSR writes. No need to call this if only 237 * EE/CE/ME/DE/RI are changing. 238 */ 239 void kvmppc_set_msr(struct kvm_vcpu *vcpu, u32 new_msr) 240 { 241 u32 old_msr = vcpu->arch.shared->msr; 242 243 #ifdef CONFIG_KVM_BOOKE_HV 244 new_msr |= MSR_GS; 245 #endif 246 247 vcpu->arch.shared->msr = new_msr; 248 249 kvmppc_mmu_msr_notify(vcpu, old_msr); 250 kvmppc_vcpu_sync_spe(vcpu); 251 kvmppc_vcpu_sync_fpu(vcpu); 252 kvmppc_vcpu_sync_debug(vcpu); 253 } 254 255 static void kvmppc_booke_queue_irqprio(struct kvm_vcpu *vcpu, 256 unsigned int priority) 257 { 258 trace_kvm_booke_queue_irqprio(vcpu, priority); 259 set_bit(priority, &vcpu->arch.pending_exceptions); 260 } 261 262 void kvmppc_core_queue_dtlb_miss(struct kvm_vcpu *vcpu, 263 ulong dear_flags, ulong esr_flags) 264 { 265 vcpu->arch.queued_dear = dear_flags; 266 vcpu->arch.queued_esr = esr_flags; 267 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DTLB_MISS); 268 } 269 270 void kvmppc_core_queue_data_storage(struct kvm_vcpu *vcpu, 271 ulong dear_flags, ulong esr_flags) 272 { 273 vcpu->arch.queued_dear = dear_flags; 274 vcpu->arch.queued_esr = esr_flags; 275 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DATA_STORAGE); 276 } 277 278 void kvmppc_core_queue_itlb_miss(struct kvm_vcpu *vcpu) 279 { 280 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ITLB_MISS); 281 } 282 283 void kvmppc_core_queue_inst_storage(struct kvm_vcpu *vcpu, ulong esr_flags) 284 { 285 vcpu->arch.queued_esr = esr_flags; 286 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_INST_STORAGE); 287 } 288 289 static void kvmppc_core_queue_alignment(struct kvm_vcpu *vcpu, ulong dear_flags, 290 ulong esr_flags) 291 { 292 vcpu->arch.queued_dear = dear_flags; 293 vcpu->arch.queued_esr = esr_flags; 294 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ALIGNMENT); 295 } 296 297 void kvmppc_core_queue_program(struct kvm_vcpu *vcpu, ulong esr_flags) 298 { 299 vcpu->arch.queued_esr = esr_flags; 300 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_PROGRAM); 301 } 302 303 void kvmppc_core_queue_dec(struct kvm_vcpu *vcpu) 304 { 305 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DECREMENTER); 306 } 307 308 int kvmppc_core_pending_dec(struct kvm_vcpu *vcpu) 309 { 310 return test_bit(BOOKE_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions); 311 } 312 313 void kvmppc_core_dequeue_dec(struct kvm_vcpu *vcpu) 314 { 315 clear_bit(BOOKE_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions); 316 } 317 318 void kvmppc_core_queue_external(struct kvm_vcpu *vcpu, 319 struct kvm_interrupt *irq) 320 { 321 unsigned int prio = BOOKE_IRQPRIO_EXTERNAL; 322 323 if (irq->irq == KVM_INTERRUPT_SET_LEVEL) 324 prio = BOOKE_IRQPRIO_EXTERNAL_LEVEL; 325 326 kvmppc_booke_queue_irqprio(vcpu, prio); 327 } 328 329 void kvmppc_core_dequeue_external(struct kvm_vcpu *vcpu) 330 { 331 clear_bit(BOOKE_IRQPRIO_EXTERNAL, &vcpu->arch.pending_exceptions); 332 clear_bit(BOOKE_IRQPRIO_EXTERNAL_LEVEL, &vcpu->arch.pending_exceptions); 333 } 334 335 static void kvmppc_core_queue_watchdog(struct kvm_vcpu *vcpu) 336 { 337 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_WATCHDOG); 338 } 339 340 static void kvmppc_core_dequeue_watchdog(struct kvm_vcpu *vcpu) 341 { 342 clear_bit(BOOKE_IRQPRIO_WATCHDOG, &vcpu->arch.pending_exceptions); 343 } 344 345 void kvmppc_core_queue_debug(struct kvm_vcpu *vcpu) 346 { 347 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DEBUG); 348 } 349 350 void kvmppc_core_dequeue_debug(struct kvm_vcpu *vcpu) 351 { 352 clear_bit(BOOKE_IRQPRIO_DEBUG, &vcpu->arch.pending_exceptions); 353 } 354 355 static void set_guest_srr(struct kvm_vcpu *vcpu, unsigned long srr0, u32 srr1) 356 { 357 kvmppc_set_srr0(vcpu, srr0); 358 kvmppc_set_srr1(vcpu, srr1); 359 } 360 361 static void set_guest_csrr(struct kvm_vcpu *vcpu, unsigned long srr0, u32 srr1) 362 { 363 vcpu->arch.csrr0 = srr0; 364 vcpu->arch.csrr1 = srr1; 365 } 366 367 static void set_guest_dsrr(struct kvm_vcpu *vcpu, unsigned long srr0, u32 srr1) 368 { 369 if (cpu_has_feature(CPU_FTR_DEBUG_LVL_EXC)) { 370 vcpu->arch.dsrr0 = srr0; 371 vcpu->arch.dsrr1 = srr1; 372 } else { 373 set_guest_csrr(vcpu, srr0, srr1); 374 } 375 } 376 377 static void set_guest_mcsrr(struct kvm_vcpu *vcpu, unsigned long srr0, u32 srr1) 378 { 379 vcpu->arch.mcsrr0 = srr0; 380 vcpu->arch.mcsrr1 = srr1; 381 } 382 383 /* Deliver the interrupt of the corresponding priority, if possible. */ 384 static int kvmppc_booke_irqprio_deliver(struct kvm_vcpu *vcpu, 385 unsigned int priority) 386 { 387 int allowed = 0; 388 ulong msr_mask = 0; 389 bool update_esr = false, update_dear = false, update_epr = false; 390 ulong crit_raw = vcpu->arch.shared->critical; 391 ulong crit_r1 = kvmppc_get_gpr(vcpu, 1); 392 bool crit; 393 bool keep_irq = false; 394 enum int_class int_class; 395 ulong new_msr = vcpu->arch.shared->msr; 396 397 /* Truncate crit indicators in 32 bit mode */ 398 if (!(vcpu->arch.shared->msr & MSR_SF)) { 399 crit_raw &= 0xffffffff; 400 crit_r1 &= 0xffffffff; 401 } 402 403 /* Critical section when crit == r1 */ 404 crit = (crit_raw == crit_r1); 405 /* ... and we're in supervisor mode */ 406 crit = crit && !(vcpu->arch.shared->msr & MSR_PR); 407 408 if (priority == BOOKE_IRQPRIO_EXTERNAL_LEVEL) { 409 priority = BOOKE_IRQPRIO_EXTERNAL; 410 keep_irq = true; 411 } 412 413 if ((priority == BOOKE_IRQPRIO_EXTERNAL) && vcpu->arch.epr_flags) 414 update_epr = true; 415 416 switch (priority) { 417 case BOOKE_IRQPRIO_DTLB_MISS: 418 case BOOKE_IRQPRIO_DATA_STORAGE: 419 case BOOKE_IRQPRIO_ALIGNMENT: 420 update_dear = true; 421 /* fall through */ 422 case BOOKE_IRQPRIO_INST_STORAGE: 423 case BOOKE_IRQPRIO_PROGRAM: 424 update_esr = true; 425 /* fall through */ 426 case BOOKE_IRQPRIO_ITLB_MISS: 427 case BOOKE_IRQPRIO_SYSCALL: 428 case BOOKE_IRQPRIO_FP_UNAVAIL: 429 #ifdef CONFIG_SPE_POSSIBLE 430 case BOOKE_IRQPRIO_SPE_UNAVAIL: 431 case BOOKE_IRQPRIO_SPE_FP_DATA: 432 case BOOKE_IRQPRIO_SPE_FP_ROUND: 433 #endif 434 #ifdef CONFIG_ALTIVEC 435 case BOOKE_IRQPRIO_ALTIVEC_UNAVAIL: 436 case BOOKE_IRQPRIO_ALTIVEC_ASSIST: 437 #endif 438 case BOOKE_IRQPRIO_AP_UNAVAIL: 439 allowed = 1; 440 msr_mask = MSR_CE | MSR_ME | MSR_DE; 441 int_class = INT_CLASS_NONCRIT; 442 break; 443 case BOOKE_IRQPRIO_WATCHDOG: 444 case BOOKE_IRQPRIO_CRITICAL: 445 case BOOKE_IRQPRIO_DBELL_CRIT: 446 allowed = vcpu->arch.shared->msr & MSR_CE; 447 allowed = allowed && !crit; 448 msr_mask = MSR_ME; 449 int_class = INT_CLASS_CRIT; 450 break; 451 case BOOKE_IRQPRIO_MACHINE_CHECK: 452 allowed = vcpu->arch.shared->msr & MSR_ME; 453 allowed = allowed && !crit; 454 int_class = INT_CLASS_MC; 455 break; 456 case BOOKE_IRQPRIO_DECREMENTER: 457 case BOOKE_IRQPRIO_FIT: 458 keep_irq = true; 459 /* fall through */ 460 case BOOKE_IRQPRIO_EXTERNAL: 461 case BOOKE_IRQPRIO_DBELL: 462 allowed = vcpu->arch.shared->msr & MSR_EE; 463 allowed = allowed && !crit; 464 msr_mask = MSR_CE | MSR_ME | MSR_DE; 465 int_class = INT_CLASS_NONCRIT; 466 break; 467 case BOOKE_IRQPRIO_DEBUG: 468 allowed = vcpu->arch.shared->msr & MSR_DE; 469 allowed = allowed && !crit; 470 msr_mask = MSR_ME; 471 if (cpu_has_feature(CPU_FTR_DEBUG_LVL_EXC)) 472 int_class = INT_CLASS_DBG; 473 else 474 int_class = INT_CLASS_CRIT; 475 476 break; 477 } 478 479 if (allowed) { 480 switch (int_class) { 481 case INT_CLASS_NONCRIT: 482 set_guest_srr(vcpu, vcpu->arch.pc, 483 vcpu->arch.shared->msr); 484 break; 485 case INT_CLASS_CRIT: 486 set_guest_csrr(vcpu, vcpu->arch.pc, 487 vcpu->arch.shared->msr); 488 break; 489 case INT_CLASS_DBG: 490 set_guest_dsrr(vcpu, vcpu->arch.pc, 491 vcpu->arch.shared->msr); 492 break; 493 case INT_CLASS_MC: 494 set_guest_mcsrr(vcpu, vcpu->arch.pc, 495 vcpu->arch.shared->msr); 496 break; 497 } 498 499 vcpu->arch.pc = vcpu->arch.ivpr | vcpu->arch.ivor[priority]; 500 if (update_esr == true) 501 kvmppc_set_esr(vcpu, vcpu->arch.queued_esr); 502 if (update_dear == true) 503 kvmppc_set_dar(vcpu, vcpu->arch.queued_dear); 504 if (update_epr == true) { 505 if (vcpu->arch.epr_flags & KVMPPC_EPR_USER) 506 kvm_make_request(KVM_REQ_EPR_EXIT, vcpu); 507 else if (vcpu->arch.epr_flags & KVMPPC_EPR_KERNEL) { 508 BUG_ON(vcpu->arch.irq_type != KVMPPC_IRQ_MPIC); 509 kvmppc_mpic_set_epr(vcpu); 510 } 511 } 512 513 new_msr &= msr_mask; 514 #if defined(CONFIG_64BIT) 515 if (vcpu->arch.epcr & SPRN_EPCR_ICM) 516 new_msr |= MSR_CM; 517 #endif 518 kvmppc_set_msr(vcpu, new_msr); 519 520 if (!keep_irq) 521 clear_bit(priority, &vcpu->arch.pending_exceptions); 522 } 523 524 #ifdef CONFIG_KVM_BOOKE_HV 525 /* 526 * If an interrupt is pending but masked, raise a guest doorbell 527 * so that we are notified when the guest enables the relevant 528 * MSR bit. 529 */ 530 if (vcpu->arch.pending_exceptions & BOOKE_IRQMASK_EE) 531 kvmppc_set_pending_interrupt(vcpu, INT_CLASS_NONCRIT); 532 if (vcpu->arch.pending_exceptions & BOOKE_IRQMASK_CE) 533 kvmppc_set_pending_interrupt(vcpu, INT_CLASS_CRIT); 534 if (vcpu->arch.pending_exceptions & BOOKE_IRQPRIO_MACHINE_CHECK) 535 kvmppc_set_pending_interrupt(vcpu, INT_CLASS_MC); 536 #endif 537 538 return allowed; 539 } 540 541 /* 542 * Return the number of jiffies until the next timeout. If the timeout is 543 * longer than the NEXT_TIMER_MAX_DELTA, then return NEXT_TIMER_MAX_DELTA 544 * because the larger value can break the timer APIs. 545 */ 546 static unsigned long watchdog_next_timeout(struct kvm_vcpu *vcpu) 547 { 548 u64 tb, wdt_tb, wdt_ticks = 0; 549 u64 nr_jiffies = 0; 550 u32 period = TCR_GET_WP(vcpu->arch.tcr); 551 552 wdt_tb = 1ULL << (63 - period); 553 tb = get_tb(); 554 /* 555 * The watchdog timeout will hapeen when TB bit corresponding 556 * to watchdog will toggle from 0 to 1. 557 */ 558 if (tb & wdt_tb) 559 wdt_ticks = wdt_tb; 560 561 wdt_ticks += wdt_tb - (tb & (wdt_tb - 1)); 562 563 /* Convert timebase ticks to jiffies */ 564 nr_jiffies = wdt_ticks; 565 566 if (do_div(nr_jiffies, tb_ticks_per_jiffy)) 567 nr_jiffies++; 568 569 return min_t(unsigned long long, nr_jiffies, NEXT_TIMER_MAX_DELTA); 570 } 571 572 static void arm_next_watchdog(struct kvm_vcpu *vcpu) 573 { 574 unsigned long nr_jiffies; 575 unsigned long flags; 576 577 /* 578 * If TSR_ENW and TSR_WIS are not set then no need to exit to 579 * userspace, so clear the KVM_REQ_WATCHDOG request. 580 */ 581 if ((vcpu->arch.tsr & (TSR_ENW | TSR_WIS)) != (TSR_ENW | TSR_WIS)) 582 clear_bit(KVM_REQ_WATCHDOG, &vcpu->requests); 583 584 spin_lock_irqsave(&vcpu->arch.wdt_lock, flags); 585 nr_jiffies = watchdog_next_timeout(vcpu); 586 /* 587 * If the number of jiffies of watchdog timer >= NEXT_TIMER_MAX_DELTA 588 * then do not run the watchdog timer as this can break timer APIs. 589 */ 590 if (nr_jiffies < NEXT_TIMER_MAX_DELTA) 591 mod_timer(&vcpu->arch.wdt_timer, jiffies + nr_jiffies); 592 else 593 del_timer(&vcpu->arch.wdt_timer); 594 spin_unlock_irqrestore(&vcpu->arch.wdt_lock, flags); 595 } 596 597 void kvmppc_watchdog_func(unsigned long data) 598 { 599 struct kvm_vcpu *vcpu = (struct kvm_vcpu *)data; 600 u32 tsr, new_tsr; 601 int final; 602 603 do { 604 new_tsr = tsr = vcpu->arch.tsr; 605 final = 0; 606 607 /* Time out event */ 608 if (tsr & TSR_ENW) { 609 if (tsr & TSR_WIS) 610 final = 1; 611 else 612 new_tsr = tsr | TSR_WIS; 613 } else { 614 new_tsr = tsr | TSR_ENW; 615 } 616 } while (cmpxchg(&vcpu->arch.tsr, tsr, new_tsr) != tsr); 617 618 if (new_tsr & TSR_WIS) { 619 smp_wmb(); 620 kvm_make_request(KVM_REQ_PENDING_TIMER, vcpu); 621 kvm_vcpu_kick(vcpu); 622 } 623 624 /* 625 * If this is final watchdog expiry and some action is required 626 * then exit to userspace. 627 */ 628 if (final && (vcpu->arch.tcr & TCR_WRC_MASK) && 629 vcpu->arch.watchdog_enabled) { 630 smp_wmb(); 631 kvm_make_request(KVM_REQ_WATCHDOG, vcpu); 632 kvm_vcpu_kick(vcpu); 633 } 634 635 /* 636 * Stop running the watchdog timer after final expiration to 637 * prevent the host from being flooded with timers if the 638 * guest sets a short period. 639 * Timers will resume when TSR/TCR is updated next time. 640 */ 641 if (!final) 642 arm_next_watchdog(vcpu); 643 } 644 645 static void update_timer_ints(struct kvm_vcpu *vcpu) 646 { 647 if ((vcpu->arch.tcr & TCR_DIE) && (vcpu->arch.tsr & TSR_DIS)) 648 kvmppc_core_queue_dec(vcpu); 649 else 650 kvmppc_core_dequeue_dec(vcpu); 651 652 if ((vcpu->arch.tcr & TCR_WIE) && (vcpu->arch.tsr & TSR_WIS)) 653 kvmppc_core_queue_watchdog(vcpu); 654 else 655 kvmppc_core_dequeue_watchdog(vcpu); 656 } 657 658 static void kvmppc_core_check_exceptions(struct kvm_vcpu *vcpu) 659 { 660 unsigned long *pending = &vcpu->arch.pending_exceptions; 661 unsigned int priority; 662 663 priority = __ffs(*pending); 664 while (priority < BOOKE_IRQPRIO_MAX) { 665 if (kvmppc_booke_irqprio_deliver(vcpu, priority)) 666 break; 667 668 priority = find_next_bit(pending, 669 BITS_PER_BYTE * sizeof(*pending), 670 priority + 1); 671 } 672 673 /* Tell the guest about our interrupt status */ 674 vcpu->arch.shared->int_pending = !!*pending; 675 } 676 677 /* Check pending exceptions and deliver one, if possible. */ 678 int kvmppc_core_prepare_to_enter(struct kvm_vcpu *vcpu) 679 { 680 int r = 0; 681 WARN_ON_ONCE(!irqs_disabled()); 682 683 kvmppc_core_check_exceptions(vcpu); 684 685 if (vcpu->requests) { 686 /* Exception delivery raised request; start over */ 687 return 1; 688 } 689 690 if (vcpu->arch.shared->msr & MSR_WE) { 691 local_irq_enable(); 692 kvm_vcpu_block(vcpu); 693 clear_bit(KVM_REQ_UNHALT, &vcpu->requests); 694 hard_irq_disable(); 695 696 kvmppc_set_exit_type(vcpu, EMULATED_MTMSRWE_EXITS); 697 r = 1; 698 }; 699 700 return r; 701 } 702 703 int kvmppc_core_check_requests(struct kvm_vcpu *vcpu) 704 { 705 int r = 1; /* Indicate we want to get back into the guest */ 706 707 if (kvm_check_request(KVM_REQ_PENDING_TIMER, vcpu)) 708 update_timer_ints(vcpu); 709 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC) 710 if (kvm_check_request(KVM_REQ_TLB_FLUSH, vcpu)) 711 kvmppc_core_flush_tlb(vcpu); 712 #endif 713 714 if (kvm_check_request(KVM_REQ_WATCHDOG, vcpu)) { 715 vcpu->run->exit_reason = KVM_EXIT_WATCHDOG; 716 r = 0; 717 } 718 719 if (kvm_check_request(KVM_REQ_EPR_EXIT, vcpu)) { 720 vcpu->run->epr.epr = 0; 721 vcpu->arch.epr_needed = true; 722 vcpu->run->exit_reason = KVM_EXIT_EPR; 723 r = 0; 724 } 725 726 return r; 727 } 728 729 int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu) 730 { 731 int ret, s; 732 struct debug_reg debug; 733 734 if (!vcpu->arch.sane) { 735 kvm_run->exit_reason = KVM_EXIT_INTERNAL_ERROR; 736 return -EINVAL; 737 } 738 739 s = kvmppc_prepare_to_enter(vcpu); 740 if (s <= 0) { 741 ret = s; 742 goto out; 743 } 744 /* interrupts now hard-disabled */ 745 746 #ifdef CONFIG_PPC_FPU 747 /* Save userspace FPU state in stack */ 748 enable_kernel_fp(); 749 750 /* 751 * Since we can't trap on MSR_FP in GS-mode, we consider the guest 752 * as always using the FPU. 753 */ 754 kvmppc_load_guest_fp(vcpu); 755 #endif 756 757 #ifdef CONFIG_ALTIVEC 758 /* Save userspace AltiVec state in stack */ 759 if (cpu_has_feature(CPU_FTR_ALTIVEC)) 760 enable_kernel_altivec(); 761 /* 762 * Since we can't trap on MSR_VEC in GS-mode, we consider the guest 763 * as always using the AltiVec. 764 */ 765 kvmppc_load_guest_altivec(vcpu); 766 #endif 767 768 /* Switch to guest debug context */ 769 debug = vcpu->arch.dbg_reg; 770 switch_booke_debug_regs(&debug); 771 debug = current->thread.debug; 772 current->thread.debug = vcpu->arch.dbg_reg; 773 774 vcpu->arch.pgdir = current->mm->pgd; 775 kvmppc_fix_ee_before_entry(); 776 777 ret = __kvmppc_vcpu_run(kvm_run, vcpu); 778 779 /* No need for kvm_guest_exit. It's done in handle_exit. 780 We also get here with interrupts enabled. */ 781 782 /* Switch back to user space debug context */ 783 switch_booke_debug_regs(&debug); 784 current->thread.debug = debug; 785 786 #ifdef CONFIG_PPC_FPU 787 kvmppc_save_guest_fp(vcpu); 788 #endif 789 790 #ifdef CONFIG_ALTIVEC 791 kvmppc_save_guest_altivec(vcpu); 792 #endif 793 794 out: 795 vcpu->mode = OUTSIDE_GUEST_MODE; 796 return ret; 797 } 798 799 static int emulation_exit(struct kvm_run *run, struct kvm_vcpu *vcpu) 800 { 801 enum emulation_result er; 802 803 er = kvmppc_emulate_instruction(run, vcpu); 804 switch (er) { 805 case EMULATE_DONE: 806 /* don't overwrite subtypes, just account kvm_stats */ 807 kvmppc_account_exit_stat(vcpu, EMULATED_INST_EXITS); 808 /* Future optimization: only reload non-volatiles if 809 * they were actually modified by emulation. */ 810 return RESUME_GUEST_NV; 811 812 case EMULATE_AGAIN: 813 return RESUME_GUEST; 814 815 case EMULATE_FAIL: 816 printk(KERN_CRIT "%s: emulation at %lx failed (%08x)\n", 817 __func__, vcpu->arch.pc, vcpu->arch.last_inst); 818 /* For debugging, encode the failing instruction and 819 * report it to userspace. */ 820 run->hw.hardware_exit_reason = ~0ULL << 32; 821 run->hw.hardware_exit_reason |= vcpu->arch.last_inst; 822 kvmppc_core_queue_program(vcpu, ESR_PIL); 823 return RESUME_HOST; 824 825 case EMULATE_EXIT_USER: 826 return RESUME_HOST; 827 828 default: 829 BUG(); 830 } 831 } 832 833 static int kvmppc_handle_debug(struct kvm_run *run, struct kvm_vcpu *vcpu) 834 { 835 struct debug_reg *dbg_reg = &(vcpu->arch.dbg_reg); 836 u32 dbsr = vcpu->arch.dbsr; 837 838 if (vcpu->guest_debug == 0) { 839 /* 840 * Debug resources belong to Guest. 841 * Imprecise debug event is not injected 842 */ 843 if (dbsr & DBSR_IDE) { 844 dbsr &= ~DBSR_IDE; 845 if (!dbsr) 846 return RESUME_GUEST; 847 } 848 849 if (dbsr && (vcpu->arch.shared->msr & MSR_DE) && 850 (vcpu->arch.dbg_reg.dbcr0 & DBCR0_IDM)) 851 kvmppc_core_queue_debug(vcpu); 852 853 /* Inject a program interrupt if trap debug is not allowed */ 854 if ((dbsr & DBSR_TIE) && !(vcpu->arch.shared->msr & MSR_DE)) 855 kvmppc_core_queue_program(vcpu, ESR_PTR); 856 857 return RESUME_GUEST; 858 } 859 860 /* 861 * Debug resource owned by userspace. 862 * Clear guest dbsr (vcpu->arch.dbsr) 863 */ 864 vcpu->arch.dbsr = 0; 865 run->debug.arch.status = 0; 866 run->debug.arch.address = vcpu->arch.pc; 867 868 if (dbsr & (DBSR_IAC1 | DBSR_IAC2 | DBSR_IAC3 | DBSR_IAC4)) { 869 run->debug.arch.status |= KVMPPC_DEBUG_BREAKPOINT; 870 } else { 871 if (dbsr & (DBSR_DAC1W | DBSR_DAC2W)) 872 run->debug.arch.status |= KVMPPC_DEBUG_WATCH_WRITE; 873 else if (dbsr & (DBSR_DAC1R | DBSR_DAC2R)) 874 run->debug.arch.status |= KVMPPC_DEBUG_WATCH_READ; 875 if (dbsr & (DBSR_DAC1R | DBSR_DAC1W)) 876 run->debug.arch.address = dbg_reg->dac1; 877 else if (dbsr & (DBSR_DAC2R | DBSR_DAC2W)) 878 run->debug.arch.address = dbg_reg->dac2; 879 } 880 881 return RESUME_HOST; 882 } 883 884 static void kvmppc_fill_pt_regs(struct pt_regs *regs) 885 { 886 ulong r1, ip, msr, lr; 887 888 asm("mr %0, 1" : "=r"(r1)); 889 asm("mflr %0" : "=r"(lr)); 890 asm("mfmsr %0" : "=r"(msr)); 891 asm("bl 1f; 1: mflr %0" : "=r"(ip)); 892 893 memset(regs, 0, sizeof(*regs)); 894 regs->gpr[1] = r1; 895 regs->nip = ip; 896 regs->msr = msr; 897 regs->link = lr; 898 } 899 900 /* 901 * For interrupts needed to be handled by host interrupt handlers, 902 * corresponding host handler are called from here in similar way 903 * (but not exact) as they are called from low level handler 904 * (such as from arch/powerpc/kernel/head_fsl_booke.S). 905 */ 906 static void kvmppc_restart_interrupt(struct kvm_vcpu *vcpu, 907 unsigned int exit_nr) 908 { 909 struct pt_regs regs; 910 911 switch (exit_nr) { 912 case BOOKE_INTERRUPT_EXTERNAL: 913 kvmppc_fill_pt_regs(®s); 914 do_IRQ(®s); 915 break; 916 case BOOKE_INTERRUPT_DECREMENTER: 917 kvmppc_fill_pt_regs(®s); 918 timer_interrupt(®s); 919 break; 920 #if defined(CONFIG_PPC_DOORBELL) 921 case BOOKE_INTERRUPT_DOORBELL: 922 kvmppc_fill_pt_regs(®s); 923 doorbell_exception(®s); 924 break; 925 #endif 926 case BOOKE_INTERRUPT_MACHINE_CHECK: 927 /* FIXME */ 928 break; 929 case BOOKE_INTERRUPT_PERFORMANCE_MONITOR: 930 kvmppc_fill_pt_regs(®s); 931 performance_monitor_exception(®s); 932 break; 933 case BOOKE_INTERRUPT_WATCHDOG: 934 kvmppc_fill_pt_regs(®s); 935 #ifdef CONFIG_BOOKE_WDT 936 WatchdogException(®s); 937 #else 938 unknown_exception(®s); 939 #endif 940 break; 941 case BOOKE_INTERRUPT_CRITICAL: 942 kvmppc_fill_pt_regs(®s); 943 unknown_exception(®s); 944 break; 945 case BOOKE_INTERRUPT_DEBUG: 946 /* Save DBSR before preemption is enabled */ 947 vcpu->arch.dbsr = mfspr(SPRN_DBSR); 948 kvmppc_clear_dbsr(); 949 break; 950 } 951 } 952 953 static int kvmppc_resume_inst_load(struct kvm_run *run, struct kvm_vcpu *vcpu, 954 enum emulation_result emulated, u32 last_inst) 955 { 956 switch (emulated) { 957 case EMULATE_AGAIN: 958 return RESUME_GUEST; 959 960 case EMULATE_FAIL: 961 pr_debug("%s: load instruction from guest address %lx failed\n", 962 __func__, vcpu->arch.pc); 963 /* For debugging, encode the failing instruction and 964 * report it to userspace. */ 965 run->hw.hardware_exit_reason = ~0ULL << 32; 966 run->hw.hardware_exit_reason |= last_inst; 967 kvmppc_core_queue_program(vcpu, ESR_PIL); 968 return RESUME_HOST; 969 970 default: 971 BUG(); 972 } 973 } 974 975 /** 976 * kvmppc_handle_exit 977 * 978 * Return value is in the form (errcode<<2 | RESUME_FLAG_HOST | RESUME_FLAG_NV) 979 */ 980 int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu, 981 unsigned int exit_nr) 982 { 983 int r = RESUME_HOST; 984 int s; 985 int idx; 986 u32 last_inst = KVM_INST_FETCH_FAILED; 987 enum emulation_result emulated = EMULATE_DONE; 988 989 /* update before a new last_exit_type is rewritten */ 990 kvmppc_update_timing_stats(vcpu); 991 992 /* restart interrupts if they were meant for the host */ 993 kvmppc_restart_interrupt(vcpu, exit_nr); 994 995 /* 996 * get last instruction before being preempted 997 * TODO: for e6500 check also BOOKE_INTERRUPT_LRAT_ERROR & ESR_DATA 998 */ 999 switch (exit_nr) { 1000 case BOOKE_INTERRUPT_DATA_STORAGE: 1001 case BOOKE_INTERRUPT_DTLB_MISS: 1002 case BOOKE_INTERRUPT_HV_PRIV: 1003 emulated = kvmppc_get_last_inst(vcpu, INST_GENERIC, &last_inst); 1004 break; 1005 case BOOKE_INTERRUPT_PROGRAM: 1006 /* SW breakpoints arrive as illegal instructions on HV */ 1007 if (vcpu->guest_debug & KVM_GUESTDBG_USE_SW_BP) 1008 emulated = kvmppc_get_last_inst(vcpu, INST_GENERIC, &last_inst); 1009 break; 1010 default: 1011 break; 1012 } 1013 1014 trace_kvm_exit(exit_nr, vcpu); 1015 __kvm_guest_exit(); 1016 1017 local_irq_enable(); 1018 1019 run->exit_reason = KVM_EXIT_UNKNOWN; 1020 run->ready_for_interrupt_injection = 1; 1021 1022 if (emulated != EMULATE_DONE) { 1023 r = kvmppc_resume_inst_load(run, vcpu, emulated, last_inst); 1024 goto out; 1025 } 1026 1027 switch (exit_nr) { 1028 case BOOKE_INTERRUPT_MACHINE_CHECK: 1029 printk("MACHINE CHECK: %lx\n", mfspr(SPRN_MCSR)); 1030 kvmppc_dump_vcpu(vcpu); 1031 /* For debugging, send invalid exit reason to user space */ 1032 run->hw.hardware_exit_reason = ~1ULL << 32; 1033 run->hw.hardware_exit_reason |= mfspr(SPRN_MCSR); 1034 r = RESUME_HOST; 1035 break; 1036 1037 case BOOKE_INTERRUPT_EXTERNAL: 1038 kvmppc_account_exit(vcpu, EXT_INTR_EXITS); 1039 r = RESUME_GUEST; 1040 break; 1041 1042 case BOOKE_INTERRUPT_DECREMENTER: 1043 kvmppc_account_exit(vcpu, DEC_EXITS); 1044 r = RESUME_GUEST; 1045 break; 1046 1047 case BOOKE_INTERRUPT_WATCHDOG: 1048 r = RESUME_GUEST; 1049 break; 1050 1051 case BOOKE_INTERRUPT_DOORBELL: 1052 kvmppc_account_exit(vcpu, DBELL_EXITS); 1053 r = RESUME_GUEST; 1054 break; 1055 1056 case BOOKE_INTERRUPT_GUEST_DBELL_CRIT: 1057 kvmppc_account_exit(vcpu, GDBELL_EXITS); 1058 1059 /* 1060 * We are here because there is a pending guest interrupt 1061 * which could not be delivered as MSR_CE or MSR_ME was not 1062 * set. Once we break from here we will retry delivery. 1063 */ 1064 r = RESUME_GUEST; 1065 break; 1066 1067 case BOOKE_INTERRUPT_GUEST_DBELL: 1068 kvmppc_account_exit(vcpu, GDBELL_EXITS); 1069 1070 /* 1071 * We are here because there is a pending guest interrupt 1072 * which could not be delivered as MSR_EE was not set. Once 1073 * we break from here we will retry delivery. 1074 */ 1075 r = RESUME_GUEST; 1076 break; 1077 1078 case BOOKE_INTERRUPT_PERFORMANCE_MONITOR: 1079 r = RESUME_GUEST; 1080 break; 1081 1082 case BOOKE_INTERRUPT_HV_PRIV: 1083 r = emulation_exit(run, vcpu); 1084 break; 1085 1086 case BOOKE_INTERRUPT_PROGRAM: 1087 if ((vcpu->guest_debug & KVM_GUESTDBG_USE_SW_BP) && 1088 (last_inst == KVMPPC_INST_SW_BREAKPOINT)) { 1089 /* 1090 * We are here because of an SW breakpoint instr, 1091 * so lets return to host to handle. 1092 */ 1093 r = kvmppc_handle_debug(run, vcpu); 1094 run->exit_reason = KVM_EXIT_DEBUG; 1095 kvmppc_account_exit(vcpu, DEBUG_EXITS); 1096 break; 1097 } 1098 1099 if (vcpu->arch.shared->msr & (MSR_PR | MSR_GS)) { 1100 /* 1101 * Program traps generated by user-level software must 1102 * be handled by the guest kernel. 1103 * 1104 * In GS mode, hypervisor privileged instructions trap 1105 * on BOOKE_INTERRUPT_HV_PRIV, not here, so these are 1106 * actual program interrupts, handled by the guest. 1107 */ 1108 kvmppc_core_queue_program(vcpu, vcpu->arch.fault_esr); 1109 r = RESUME_GUEST; 1110 kvmppc_account_exit(vcpu, USR_PR_INST); 1111 break; 1112 } 1113 1114 r = emulation_exit(run, vcpu); 1115 break; 1116 1117 case BOOKE_INTERRUPT_FP_UNAVAIL: 1118 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_FP_UNAVAIL); 1119 kvmppc_account_exit(vcpu, FP_UNAVAIL); 1120 r = RESUME_GUEST; 1121 break; 1122 1123 #ifdef CONFIG_SPE 1124 case BOOKE_INTERRUPT_SPE_UNAVAIL: { 1125 if (vcpu->arch.shared->msr & MSR_SPE) 1126 kvmppc_vcpu_enable_spe(vcpu); 1127 else 1128 kvmppc_booke_queue_irqprio(vcpu, 1129 BOOKE_IRQPRIO_SPE_UNAVAIL); 1130 r = RESUME_GUEST; 1131 break; 1132 } 1133 1134 case BOOKE_INTERRUPT_SPE_FP_DATA: 1135 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SPE_FP_DATA); 1136 r = RESUME_GUEST; 1137 break; 1138 1139 case BOOKE_INTERRUPT_SPE_FP_ROUND: 1140 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SPE_FP_ROUND); 1141 r = RESUME_GUEST; 1142 break; 1143 #elif defined(CONFIG_SPE_POSSIBLE) 1144 case BOOKE_INTERRUPT_SPE_UNAVAIL: 1145 /* 1146 * Guest wants SPE, but host kernel doesn't support it. Send 1147 * an "unimplemented operation" program check to the guest. 1148 */ 1149 kvmppc_core_queue_program(vcpu, ESR_PUO | ESR_SPV); 1150 r = RESUME_GUEST; 1151 break; 1152 1153 /* 1154 * These really should never happen without CONFIG_SPE, 1155 * as we should never enable the real MSR[SPE] in the guest. 1156 */ 1157 case BOOKE_INTERRUPT_SPE_FP_DATA: 1158 case BOOKE_INTERRUPT_SPE_FP_ROUND: 1159 printk(KERN_CRIT "%s: unexpected SPE interrupt %u at %08lx\n", 1160 __func__, exit_nr, vcpu->arch.pc); 1161 run->hw.hardware_exit_reason = exit_nr; 1162 r = RESUME_HOST; 1163 break; 1164 #endif /* CONFIG_SPE_POSSIBLE */ 1165 1166 /* 1167 * On cores with Vector category, KVM is loaded only if CONFIG_ALTIVEC, 1168 * see kvmppc_core_check_processor_compat(). 1169 */ 1170 #ifdef CONFIG_ALTIVEC 1171 case BOOKE_INTERRUPT_ALTIVEC_UNAVAIL: 1172 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ALTIVEC_UNAVAIL); 1173 r = RESUME_GUEST; 1174 break; 1175 1176 case BOOKE_INTERRUPT_ALTIVEC_ASSIST: 1177 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ALTIVEC_ASSIST); 1178 r = RESUME_GUEST; 1179 break; 1180 #endif 1181 1182 case BOOKE_INTERRUPT_DATA_STORAGE: 1183 kvmppc_core_queue_data_storage(vcpu, vcpu->arch.fault_dear, 1184 vcpu->arch.fault_esr); 1185 kvmppc_account_exit(vcpu, DSI_EXITS); 1186 r = RESUME_GUEST; 1187 break; 1188 1189 case BOOKE_INTERRUPT_INST_STORAGE: 1190 kvmppc_core_queue_inst_storage(vcpu, vcpu->arch.fault_esr); 1191 kvmppc_account_exit(vcpu, ISI_EXITS); 1192 r = RESUME_GUEST; 1193 break; 1194 1195 case BOOKE_INTERRUPT_ALIGNMENT: 1196 kvmppc_core_queue_alignment(vcpu, vcpu->arch.fault_dear, 1197 vcpu->arch.fault_esr); 1198 r = RESUME_GUEST; 1199 break; 1200 1201 #ifdef CONFIG_KVM_BOOKE_HV 1202 case BOOKE_INTERRUPT_HV_SYSCALL: 1203 if (!(vcpu->arch.shared->msr & MSR_PR)) { 1204 kvmppc_set_gpr(vcpu, 3, kvmppc_kvm_pv(vcpu)); 1205 } else { 1206 /* 1207 * hcall from guest userspace -- send privileged 1208 * instruction program check. 1209 */ 1210 kvmppc_core_queue_program(vcpu, ESR_PPR); 1211 } 1212 1213 r = RESUME_GUEST; 1214 break; 1215 #else 1216 case BOOKE_INTERRUPT_SYSCALL: 1217 if (!(vcpu->arch.shared->msr & MSR_PR) && 1218 (((u32)kvmppc_get_gpr(vcpu, 0)) == KVM_SC_MAGIC_R0)) { 1219 /* KVM PV hypercalls */ 1220 kvmppc_set_gpr(vcpu, 3, kvmppc_kvm_pv(vcpu)); 1221 r = RESUME_GUEST; 1222 } else { 1223 /* Guest syscalls */ 1224 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SYSCALL); 1225 } 1226 kvmppc_account_exit(vcpu, SYSCALL_EXITS); 1227 r = RESUME_GUEST; 1228 break; 1229 #endif 1230 1231 case BOOKE_INTERRUPT_DTLB_MISS: { 1232 unsigned long eaddr = vcpu->arch.fault_dear; 1233 int gtlb_index; 1234 gpa_t gpaddr; 1235 gfn_t gfn; 1236 1237 #ifdef CONFIG_KVM_E500V2 1238 if (!(vcpu->arch.shared->msr & MSR_PR) && 1239 (eaddr & PAGE_MASK) == vcpu->arch.magic_page_ea) { 1240 kvmppc_map_magic(vcpu); 1241 kvmppc_account_exit(vcpu, DTLB_VIRT_MISS_EXITS); 1242 r = RESUME_GUEST; 1243 1244 break; 1245 } 1246 #endif 1247 1248 /* Check the guest TLB. */ 1249 gtlb_index = kvmppc_mmu_dtlb_index(vcpu, eaddr); 1250 if (gtlb_index < 0) { 1251 /* The guest didn't have a mapping for it. */ 1252 kvmppc_core_queue_dtlb_miss(vcpu, 1253 vcpu->arch.fault_dear, 1254 vcpu->arch.fault_esr); 1255 kvmppc_mmu_dtlb_miss(vcpu); 1256 kvmppc_account_exit(vcpu, DTLB_REAL_MISS_EXITS); 1257 r = RESUME_GUEST; 1258 break; 1259 } 1260 1261 idx = srcu_read_lock(&vcpu->kvm->srcu); 1262 1263 gpaddr = kvmppc_mmu_xlate(vcpu, gtlb_index, eaddr); 1264 gfn = gpaddr >> PAGE_SHIFT; 1265 1266 if (kvm_is_visible_gfn(vcpu->kvm, gfn)) { 1267 /* The guest TLB had a mapping, but the shadow TLB 1268 * didn't, and it is RAM. This could be because: 1269 * a) the entry is mapping the host kernel, or 1270 * b) the guest used a large mapping which we're faking 1271 * Either way, we need to satisfy the fault without 1272 * invoking the guest. */ 1273 kvmppc_mmu_map(vcpu, eaddr, gpaddr, gtlb_index); 1274 kvmppc_account_exit(vcpu, DTLB_VIRT_MISS_EXITS); 1275 r = RESUME_GUEST; 1276 } else { 1277 /* Guest has mapped and accessed a page which is not 1278 * actually RAM. */ 1279 vcpu->arch.paddr_accessed = gpaddr; 1280 vcpu->arch.vaddr_accessed = eaddr; 1281 r = kvmppc_emulate_mmio(run, vcpu); 1282 kvmppc_account_exit(vcpu, MMIO_EXITS); 1283 } 1284 1285 srcu_read_unlock(&vcpu->kvm->srcu, idx); 1286 break; 1287 } 1288 1289 case BOOKE_INTERRUPT_ITLB_MISS: { 1290 unsigned long eaddr = vcpu->arch.pc; 1291 gpa_t gpaddr; 1292 gfn_t gfn; 1293 int gtlb_index; 1294 1295 r = RESUME_GUEST; 1296 1297 /* Check the guest TLB. */ 1298 gtlb_index = kvmppc_mmu_itlb_index(vcpu, eaddr); 1299 if (gtlb_index < 0) { 1300 /* The guest didn't have a mapping for it. */ 1301 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ITLB_MISS); 1302 kvmppc_mmu_itlb_miss(vcpu); 1303 kvmppc_account_exit(vcpu, ITLB_REAL_MISS_EXITS); 1304 break; 1305 } 1306 1307 kvmppc_account_exit(vcpu, ITLB_VIRT_MISS_EXITS); 1308 1309 idx = srcu_read_lock(&vcpu->kvm->srcu); 1310 1311 gpaddr = kvmppc_mmu_xlate(vcpu, gtlb_index, eaddr); 1312 gfn = gpaddr >> PAGE_SHIFT; 1313 1314 if (kvm_is_visible_gfn(vcpu->kvm, gfn)) { 1315 /* The guest TLB had a mapping, but the shadow TLB 1316 * didn't. This could be because: 1317 * a) the entry is mapping the host kernel, or 1318 * b) the guest used a large mapping which we're faking 1319 * Either way, we need to satisfy the fault without 1320 * invoking the guest. */ 1321 kvmppc_mmu_map(vcpu, eaddr, gpaddr, gtlb_index); 1322 } else { 1323 /* Guest mapped and leaped at non-RAM! */ 1324 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_MACHINE_CHECK); 1325 } 1326 1327 srcu_read_unlock(&vcpu->kvm->srcu, idx); 1328 break; 1329 } 1330 1331 case BOOKE_INTERRUPT_DEBUG: { 1332 r = kvmppc_handle_debug(run, vcpu); 1333 if (r == RESUME_HOST) 1334 run->exit_reason = KVM_EXIT_DEBUG; 1335 kvmppc_account_exit(vcpu, DEBUG_EXITS); 1336 break; 1337 } 1338 1339 default: 1340 printk(KERN_EMERG "exit_nr %d\n", exit_nr); 1341 BUG(); 1342 } 1343 1344 out: 1345 /* 1346 * To avoid clobbering exit_reason, only check for signals if we 1347 * aren't already exiting to userspace for some other reason. 1348 */ 1349 if (!(r & RESUME_HOST)) { 1350 s = kvmppc_prepare_to_enter(vcpu); 1351 if (s <= 0) 1352 r = (s << 2) | RESUME_HOST | (r & RESUME_FLAG_NV); 1353 else { 1354 /* interrupts now hard-disabled */ 1355 kvmppc_fix_ee_before_entry(); 1356 kvmppc_load_guest_fp(vcpu); 1357 kvmppc_load_guest_altivec(vcpu); 1358 } 1359 } 1360 1361 return r; 1362 } 1363 1364 static void kvmppc_set_tsr(struct kvm_vcpu *vcpu, u32 new_tsr) 1365 { 1366 u32 old_tsr = vcpu->arch.tsr; 1367 1368 vcpu->arch.tsr = new_tsr; 1369 1370 if ((old_tsr ^ vcpu->arch.tsr) & (TSR_ENW | TSR_WIS)) 1371 arm_next_watchdog(vcpu); 1372 1373 update_timer_ints(vcpu); 1374 } 1375 1376 /* Initial guest state: 16MB mapping 0 -> 0, PC = 0, MSR = 0, R1 = 16MB */ 1377 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) 1378 { 1379 int i; 1380 int r; 1381 1382 vcpu->arch.pc = 0; 1383 vcpu->arch.shared->pir = vcpu->vcpu_id; 1384 kvmppc_set_gpr(vcpu, 1, (16<<20) - 8); /* -8 for the callee-save LR slot */ 1385 kvmppc_set_msr(vcpu, 0); 1386 1387 #ifndef CONFIG_KVM_BOOKE_HV 1388 vcpu->arch.shadow_msr = MSR_USER | MSR_IS | MSR_DS; 1389 vcpu->arch.shadow_pid = 1; 1390 vcpu->arch.shared->msr = 0; 1391 #endif 1392 1393 /* Eye-catching numbers so we know if the guest takes an interrupt 1394 * before it's programmed its own IVPR/IVORs. */ 1395 vcpu->arch.ivpr = 0x55550000; 1396 for (i = 0; i < BOOKE_IRQPRIO_MAX; i++) 1397 vcpu->arch.ivor[i] = 0x7700 | i * 4; 1398 1399 kvmppc_init_timing_stats(vcpu); 1400 1401 r = kvmppc_core_vcpu_setup(vcpu); 1402 kvmppc_sanity_check(vcpu); 1403 return r; 1404 } 1405 1406 int kvmppc_subarch_vcpu_init(struct kvm_vcpu *vcpu) 1407 { 1408 /* setup watchdog timer once */ 1409 spin_lock_init(&vcpu->arch.wdt_lock); 1410 setup_timer(&vcpu->arch.wdt_timer, kvmppc_watchdog_func, 1411 (unsigned long)vcpu); 1412 1413 /* 1414 * Clear DBSR.MRR to avoid guest debug interrupt as 1415 * this is of host interest 1416 */ 1417 mtspr(SPRN_DBSR, DBSR_MRR); 1418 return 0; 1419 } 1420 1421 void kvmppc_subarch_vcpu_uninit(struct kvm_vcpu *vcpu) 1422 { 1423 del_timer_sync(&vcpu->arch.wdt_timer); 1424 } 1425 1426 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) 1427 { 1428 int i; 1429 1430 regs->pc = vcpu->arch.pc; 1431 regs->cr = kvmppc_get_cr(vcpu); 1432 regs->ctr = vcpu->arch.ctr; 1433 regs->lr = vcpu->arch.lr; 1434 regs->xer = kvmppc_get_xer(vcpu); 1435 regs->msr = vcpu->arch.shared->msr; 1436 regs->srr0 = kvmppc_get_srr0(vcpu); 1437 regs->srr1 = kvmppc_get_srr1(vcpu); 1438 regs->pid = vcpu->arch.pid; 1439 regs->sprg0 = kvmppc_get_sprg0(vcpu); 1440 regs->sprg1 = kvmppc_get_sprg1(vcpu); 1441 regs->sprg2 = kvmppc_get_sprg2(vcpu); 1442 regs->sprg3 = kvmppc_get_sprg3(vcpu); 1443 regs->sprg4 = kvmppc_get_sprg4(vcpu); 1444 regs->sprg5 = kvmppc_get_sprg5(vcpu); 1445 regs->sprg6 = kvmppc_get_sprg6(vcpu); 1446 regs->sprg7 = kvmppc_get_sprg7(vcpu); 1447 1448 for (i = 0; i < ARRAY_SIZE(regs->gpr); i++) 1449 regs->gpr[i] = kvmppc_get_gpr(vcpu, i); 1450 1451 return 0; 1452 } 1453 1454 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) 1455 { 1456 int i; 1457 1458 vcpu->arch.pc = regs->pc; 1459 kvmppc_set_cr(vcpu, regs->cr); 1460 vcpu->arch.ctr = regs->ctr; 1461 vcpu->arch.lr = regs->lr; 1462 kvmppc_set_xer(vcpu, regs->xer); 1463 kvmppc_set_msr(vcpu, regs->msr); 1464 kvmppc_set_srr0(vcpu, regs->srr0); 1465 kvmppc_set_srr1(vcpu, regs->srr1); 1466 kvmppc_set_pid(vcpu, regs->pid); 1467 kvmppc_set_sprg0(vcpu, regs->sprg0); 1468 kvmppc_set_sprg1(vcpu, regs->sprg1); 1469 kvmppc_set_sprg2(vcpu, regs->sprg2); 1470 kvmppc_set_sprg3(vcpu, regs->sprg3); 1471 kvmppc_set_sprg4(vcpu, regs->sprg4); 1472 kvmppc_set_sprg5(vcpu, regs->sprg5); 1473 kvmppc_set_sprg6(vcpu, regs->sprg6); 1474 kvmppc_set_sprg7(vcpu, regs->sprg7); 1475 1476 for (i = 0; i < ARRAY_SIZE(regs->gpr); i++) 1477 kvmppc_set_gpr(vcpu, i, regs->gpr[i]); 1478 1479 return 0; 1480 } 1481 1482 static void get_sregs_base(struct kvm_vcpu *vcpu, 1483 struct kvm_sregs *sregs) 1484 { 1485 u64 tb = get_tb(); 1486 1487 sregs->u.e.features |= KVM_SREGS_E_BASE; 1488 1489 sregs->u.e.csrr0 = vcpu->arch.csrr0; 1490 sregs->u.e.csrr1 = vcpu->arch.csrr1; 1491 sregs->u.e.mcsr = vcpu->arch.mcsr; 1492 sregs->u.e.esr = kvmppc_get_esr(vcpu); 1493 sregs->u.e.dear = kvmppc_get_dar(vcpu); 1494 sregs->u.e.tsr = vcpu->arch.tsr; 1495 sregs->u.e.tcr = vcpu->arch.tcr; 1496 sregs->u.e.dec = kvmppc_get_dec(vcpu, tb); 1497 sregs->u.e.tb = tb; 1498 sregs->u.e.vrsave = vcpu->arch.vrsave; 1499 } 1500 1501 static int set_sregs_base(struct kvm_vcpu *vcpu, 1502 struct kvm_sregs *sregs) 1503 { 1504 if (!(sregs->u.e.features & KVM_SREGS_E_BASE)) 1505 return 0; 1506 1507 vcpu->arch.csrr0 = sregs->u.e.csrr0; 1508 vcpu->arch.csrr1 = sregs->u.e.csrr1; 1509 vcpu->arch.mcsr = sregs->u.e.mcsr; 1510 kvmppc_set_esr(vcpu, sregs->u.e.esr); 1511 kvmppc_set_dar(vcpu, sregs->u.e.dear); 1512 vcpu->arch.vrsave = sregs->u.e.vrsave; 1513 kvmppc_set_tcr(vcpu, sregs->u.e.tcr); 1514 1515 if (sregs->u.e.update_special & KVM_SREGS_E_UPDATE_DEC) { 1516 vcpu->arch.dec = sregs->u.e.dec; 1517 kvmppc_emulate_dec(vcpu); 1518 } 1519 1520 if (sregs->u.e.update_special & KVM_SREGS_E_UPDATE_TSR) 1521 kvmppc_set_tsr(vcpu, sregs->u.e.tsr); 1522 1523 return 0; 1524 } 1525 1526 static void get_sregs_arch206(struct kvm_vcpu *vcpu, 1527 struct kvm_sregs *sregs) 1528 { 1529 sregs->u.e.features |= KVM_SREGS_E_ARCH206; 1530 1531 sregs->u.e.pir = vcpu->vcpu_id; 1532 sregs->u.e.mcsrr0 = vcpu->arch.mcsrr0; 1533 sregs->u.e.mcsrr1 = vcpu->arch.mcsrr1; 1534 sregs->u.e.decar = vcpu->arch.decar; 1535 sregs->u.e.ivpr = vcpu->arch.ivpr; 1536 } 1537 1538 static int set_sregs_arch206(struct kvm_vcpu *vcpu, 1539 struct kvm_sregs *sregs) 1540 { 1541 if (!(sregs->u.e.features & KVM_SREGS_E_ARCH206)) 1542 return 0; 1543 1544 if (sregs->u.e.pir != vcpu->vcpu_id) 1545 return -EINVAL; 1546 1547 vcpu->arch.mcsrr0 = sregs->u.e.mcsrr0; 1548 vcpu->arch.mcsrr1 = sregs->u.e.mcsrr1; 1549 vcpu->arch.decar = sregs->u.e.decar; 1550 vcpu->arch.ivpr = sregs->u.e.ivpr; 1551 1552 return 0; 1553 } 1554 1555 int kvmppc_get_sregs_ivor(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs) 1556 { 1557 sregs->u.e.features |= KVM_SREGS_E_IVOR; 1558 1559 sregs->u.e.ivor_low[0] = vcpu->arch.ivor[BOOKE_IRQPRIO_CRITICAL]; 1560 sregs->u.e.ivor_low[1] = vcpu->arch.ivor[BOOKE_IRQPRIO_MACHINE_CHECK]; 1561 sregs->u.e.ivor_low[2] = vcpu->arch.ivor[BOOKE_IRQPRIO_DATA_STORAGE]; 1562 sregs->u.e.ivor_low[3] = vcpu->arch.ivor[BOOKE_IRQPRIO_INST_STORAGE]; 1563 sregs->u.e.ivor_low[4] = vcpu->arch.ivor[BOOKE_IRQPRIO_EXTERNAL]; 1564 sregs->u.e.ivor_low[5] = vcpu->arch.ivor[BOOKE_IRQPRIO_ALIGNMENT]; 1565 sregs->u.e.ivor_low[6] = vcpu->arch.ivor[BOOKE_IRQPRIO_PROGRAM]; 1566 sregs->u.e.ivor_low[7] = vcpu->arch.ivor[BOOKE_IRQPRIO_FP_UNAVAIL]; 1567 sregs->u.e.ivor_low[8] = vcpu->arch.ivor[BOOKE_IRQPRIO_SYSCALL]; 1568 sregs->u.e.ivor_low[9] = vcpu->arch.ivor[BOOKE_IRQPRIO_AP_UNAVAIL]; 1569 sregs->u.e.ivor_low[10] = vcpu->arch.ivor[BOOKE_IRQPRIO_DECREMENTER]; 1570 sregs->u.e.ivor_low[11] = vcpu->arch.ivor[BOOKE_IRQPRIO_FIT]; 1571 sregs->u.e.ivor_low[12] = vcpu->arch.ivor[BOOKE_IRQPRIO_WATCHDOG]; 1572 sregs->u.e.ivor_low[13] = vcpu->arch.ivor[BOOKE_IRQPRIO_DTLB_MISS]; 1573 sregs->u.e.ivor_low[14] = vcpu->arch.ivor[BOOKE_IRQPRIO_ITLB_MISS]; 1574 sregs->u.e.ivor_low[15] = vcpu->arch.ivor[BOOKE_IRQPRIO_DEBUG]; 1575 return 0; 1576 } 1577 1578 int kvmppc_set_sregs_ivor(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs) 1579 { 1580 if (!(sregs->u.e.features & KVM_SREGS_E_IVOR)) 1581 return 0; 1582 1583 vcpu->arch.ivor[BOOKE_IRQPRIO_CRITICAL] = sregs->u.e.ivor_low[0]; 1584 vcpu->arch.ivor[BOOKE_IRQPRIO_MACHINE_CHECK] = sregs->u.e.ivor_low[1]; 1585 vcpu->arch.ivor[BOOKE_IRQPRIO_DATA_STORAGE] = sregs->u.e.ivor_low[2]; 1586 vcpu->arch.ivor[BOOKE_IRQPRIO_INST_STORAGE] = sregs->u.e.ivor_low[3]; 1587 vcpu->arch.ivor[BOOKE_IRQPRIO_EXTERNAL] = sregs->u.e.ivor_low[4]; 1588 vcpu->arch.ivor[BOOKE_IRQPRIO_ALIGNMENT] = sregs->u.e.ivor_low[5]; 1589 vcpu->arch.ivor[BOOKE_IRQPRIO_PROGRAM] = sregs->u.e.ivor_low[6]; 1590 vcpu->arch.ivor[BOOKE_IRQPRIO_FP_UNAVAIL] = sregs->u.e.ivor_low[7]; 1591 vcpu->arch.ivor[BOOKE_IRQPRIO_SYSCALL] = sregs->u.e.ivor_low[8]; 1592 vcpu->arch.ivor[BOOKE_IRQPRIO_AP_UNAVAIL] = sregs->u.e.ivor_low[9]; 1593 vcpu->arch.ivor[BOOKE_IRQPRIO_DECREMENTER] = sregs->u.e.ivor_low[10]; 1594 vcpu->arch.ivor[BOOKE_IRQPRIO_FIT] = sregs->u.e.ivor_low[11]; 1595 vcpu->arch.ivor[BOOKE_IRQPRIO_WATCHDOG] = sregs->u.e.ivor_low[12]; 1596 vcpu->arch.ivor[BOOKE_IRQPRIO_DTLB_MISS] = sregs->u.e.ivor_low[13]; 1597 vcpu->arch.ivor[BOOKE_IRQPRIO_ITLB_MISS] = sregs->u.e.ivor_low[14]; 1598 vcpu->arch.ivor[BOOKE_IRQPRIO_DEBUG] = sregs->u.e.ivor_low[15]; 1599 1600 return 0; 1601 } 1602 1603 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, 1604 struct kvm_sregs *sregs) 1605 { 1606 sregs->pvr = vcpu->arch.pvr; 1607 1608 get_sregs_base(vcpu, sregs); 1609 get_sregs_arch206(vcpu, sregs); 1610 return vcpu->kvm->arch.kvm_ops->get_sregs(vcpu, sregs); 1611 } 1612 1613 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, 1614 struct kvm_sregs *sregs) 1615 { 1616 int ret; 1617 1618 if (vcpu->arch.pvr != sregs->pvr) 1619 return -EINVAL; 1620 1621 ret = set_sregs_base(vcpu, sregs); 1622 if (ret < 0) 1623 return ret; 1624 1625 ret = set_sregs_arch206(vcpu, sregs); 1626 if (ret < 0) 1627 return ret; 1628 1629 return vcpu->kvm->arch.kvm_ops->set_sregs(vcpu, sregs); 1630 } 1631 1632 int kvmppc_get_one_reg(struct kvm_vcpu *vcpu, u64 id, 1633 union kvmppc_one_reg *val) 1634 { 1635 int r = 0; 1636 1637 switch (id) { 1638 case KVM_REG_PPC_IAC1: 1639 *val = get_reg_val(id, vcpu->arch.dbg_reg.iac1); 1640 break; 1641 case KVM_REG_PPC_IAC2: 1642 *val = get_reg_val(id, vcpu->arch.dbg_reg.iac2); 1643 break; 1644 #if CONFIG_PPC_ADV_DEBUG_IACS > 2 1645 case KVM_REG_PPC_IAC3: 1646 *val = get_reg_val(id, vcpu->arch.dbg_reg.iac3); 1647 break; 1648 case KVM_REG_PPC_IAC4: 1649 *val = get_reg_val(id, vcpu->arch.dbg_reg.iac4); 1650 break; 1651 #endif 1652 case KVM_REG_PPC_DAC1: 1653 *val = get_reg_val(id, vcpu->arch.dbg_reg.dac1); 1654 break; 1655 case KVM_REG_PPC_DAC2: 1656 *val = get_reg_val(id, vcpu->arch.dbg_reg.dac2); 1657 break; 1658 case KVM_REG_PPC_EPR: { 1659 u32 epr = kvmppc_get_epr(vcpu); 1660 *val = get_reg_val(id, epr); 1661 break; 1662 } 1663 #if defined(CONFIG_64BIT) 1664 case KVM_REG_PPC_EPCR: 1665 *val = get_reg_val(id, vcpu->arch.epcr); 1666 break; 1667 #endif 1668 case KVM_REG_PPC_TCR: 1669 *val = get_reg_val(id, vcpu->arch.tcr); 1670 break; 1671 case KVM_REG_PPC_TSR: 1672 *val = get_reg_val(id, vcpu->arch.tsr); 1673 break; 1674 case KVM_REG_PPC_DEBUG_INST: 1675 *val = get_reg_val(id, KVMPPC_INST_SW_BREAKPOINT); 1676 break; 1677 case KVM_REG_PPC_VRSAVE: 1678 *val = get_reg_val(id, vcpu->arch.vrsave); 1679 break; 1680 default: 1681 r = vcpu->kvm->arch.kvm_ops->get_one_reg(vcpu, id, val); 1682 break; 1683 } 1684 1685 return r; 1686 } 1687 1688 int kvmppc_set_one_reg(struct kvm_vcpu *vcpu, u64 id, 1689 union kvmppc_one_reg *val) 1690 { 1691 int r = 0; 1692 1693 switch (id) { 1694 case KVM_REG_PPC_IAC1: 1695 vcpu->arch.dbg_reg.iac1 = set_reg_val(id, *val); 1696 break; 1697 case KVM_REG_PPC_IAC2: 1698 vcpu->arch.dbg_reg.iac2 = set_reg_val(id, *val); 1699 break; 1700 #if CONFIG_PPC_ADV_DEBUG_IACS > 2 1701 case KVM_REG_PPC_IAC3: 1702 vcpu->arch.dbg_reg.iac3 = set_reg_val(id, *val); 1703 break; 1704 case KVM_REG_PPC_IAC4: 1705 vcpu->arch.dbg_reg.iac4 = set_reg_val(id, *val); 1706 break; 1707 #endif 1708 case KVM_REG_PPC_DAC1: 1709 vcpu->arch.dbg_reg.dac1 = set_reg_val(id, *val); 1710 break; 1711 case KVM_REG_PPC_DAC2: 1712 vcpu->arch.dbg_reg.dac2 = set_reg_val(id, *val); 1713 break; 1714 case KVM_REG_PPC_EPR: { 1715 u32 new_epr = set_reg_val(id, *val); 1716 kvmppc_set_epr(vcpu, new_epr); 1717 break; 1718 } 1719 #if defined(CONFIG_64BIT) 1720 case KVM_REG_PPC_EPCR: { 1721 u32 new_epcr = set_reg_val(id, *val); 1722 kvmppc_set_epcr(vcpu, new_epcr); 1723 break; 1724 } 1725 #endif 1726 case KVM_REG_PPC_OR_TSR: { 1727 u32 tsr_bits = set_reg_val(id, *val); 1728 kvmppc_set_tsr_bits(vcpu, tsr_bits); 1729 break; 1730 } 1731 case KVM_REG_PPC_CLEAR_TSR: { 1732 u32 tsr_bits = set_reg_val(id, *val); 1733 kvmppc_clr_tsr_bits(vcpu, tsr_bits); 1734 break; 1735 } 1736 case KVM_REG_PPC_TSR: { 1737 u32 tsr = set_reg_val(id, *val); 1738 kvmppc_set_tsr(vcpu, tsr); 1739 break; 1740 } 1741 case KVM_REG_PPC_TCR: { 1742 u32 tcr = set_reg_val(id, *val); 1743 kvmppc_set_tcr(vcpu, tcr); 1744 break; 1745 } 1746 case KVM_REG_PPC_VRSAVE: 1747 vcpu->arch.vrsave = set_reg_val(id, *val); 1748 break; 1749 default: 1750 r = vcpu->kvm->arch.kvm_ops->set_one_reg(vcpu, id, val); 1751 break; 1752 } 1753 1754 return r; 1755 } 1756 1757 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) 1758 { 1759 return -ENOTSUPP; 1760 } 1761 1762 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) 1763 { 1764 return -ENOTSUPP; 1765 } 1766 1767 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, 1768 struct kvm_translation *tr) 1769 { 1770 int r; 1771 1772 r = kvmppc_core_vcpu_translate(vcpu, tr); 1773 return r; 1774 } 1775 1776 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log) 1777 { 1778 return -ENOTSUPP; 1779 } 1780 1781 void kvmppc_core_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free, 1782 struct kvm_memory_slot *dont) 1783 { 1784 } 1785 1786 int kvmppc_core_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot, 1787 unsigned long npages) 1788 { 1789 return 0; 1790 } 1791 1792 int kvmppc_core_prepare_memory_region(struct kvm *kvm, 1793 struct kvm_memory_slot *memslot, 1794 const struct kvm_userspace_memory_region *mem) 1795 { 1796 return 0; 1797 } 1798 1799 void kvmppc_core_commit_memory_region(struct kvm *kvm, 1800 const struct kvm_userspace_memory_region *mem, 1801 const struct kvm_memory_slot *old, 1802 const struct kvm_memory_slot *new) 1803 { 1804 } 1805 1806 void kvmppc_core_flush_memslot(struct kvm *kvm, struct kvm_memory_slot *memslot) 1807 { 1808 } 1809 1810 void kvmppc_set_epcr(struct kvm_vcpu *vcpu, u32 new_epcr) 1811 { 1812 #if defined(CONFIG_64BIT) 1813 vcpu->arch.epcr = new_epcr; 1814 #ifdef CONFIG_KVM_BOOKE_HV 1815 vcpu->arch.shadow_epcr &= ~SPRN_EPCR_GICM; 1816 if (vcpu->arch.epcr & SPRN_EPCR_ICM) 1817 vcpu->arch.shadow_epcr |= SPRN_EPCR_GICM; 1818 #endif 1819 #endif 1820 } 1821 1822 void kvmppc_set_tcr(struct kvm_vcpu *vcpu, u32 new_tcr) 1823 { 1824 vcpu->arch.tcr = new_tcr; 1825 arm_next_watchdog(vcpu); 1826 update_timer_ints(vcpu); 1827 } 1828 1829 void kvmppc_set_tsr_bits(struct kvm_vcpu *vcpu, u32 tsr_bits) 1830 { 1831 set_bits(tsr_bits, &vcpu->arch.tsr); 1832 smp_wmb(); 1833 kvm_make_request(KVM_REQ_PENDING_TIMER, vcpu); 1834 kvm_vcpu_kick(vcpu); 1835 } 1836 1837 void kvmppc_clr_tsr_bits(struct kvm_vcpu *vcpu, u32 tsr_bits) 1838 { 1839 clear_bits(tsr_bits, &vcpu->arch.tsr); 1840 1841 /* 1842 * We may have stopped the watchdog due to 1843 * being stuck on final expiration. 1844 */ 1845 if (tsr_bits & (TSR_ENW | TSR_WIS)) 1846 arm_next_watchdog(vcpu); 1847 1848 update_timer_ints(vcpu); 1849 } 1850 1851 void kvmppc_decrementer_func(struct kvm_vcpu *vcpu) 1852 { 1853 if (vcpu->arch.tcr & TCR_ARE) { 1854 vcpu->arch.dec = vcpu->arch.decar; 1855 kvmppc_emulate_dec(vcpu); 1856 } 1857 1858 kvmppc_set_tsr_bits(vcpu, TSR_DIS); 1859 } 1860 1861 static int kvmppc_booke_add_breakpoint(struct debug_reg *dbg_reg, 1862 uint64_t addr, int index) 1863 { 1864 switch (index) { 1865 case 0: 1866 dbg_reg->dbcr0 |= DBCR0_IAC1; 1867 dbg_reg->iac1 = addr; 1868 break; 1869 case 1: 1870 dbg_reg->dbcr0 |= DBCR0_IAC2; 1871 dbg_reg->iac2 = addr; 1872 break; 1873 #if CONFIG_PPC_ADV_DEBUG_IACS > 2 1874 case 2: 1875 dbg_reg->dbcr0 |= DBCR0_IAC3; 1876 dbg_reg->iac3 = addr; 1877 break; 1878 case 3: 1879 dbg_reg->dbcr0 |= DBCR0_IAC4; 1880 dbg_reg->iac4 = addr; 1881 break; 1882 #endif 1883 default: 1884 return -EINVAL; 1885 } 1886 1887 dbg_reg->dbcr0 |= DBCR0_IDM; 1888 return 0; 1889 } 1890 1891 static int kvmppc_booke_add_watchpoint(struct debug_reg *dbg_reg, uint64_t addr, 1892 int type, int index) 1893 { 1894 switch (index) { 1895 case 0: 1896 if (type & KVMPPC_DEBUG_WATCH_READ) 1897 dbg_reg->dbcr0 |= DBCR0_DAC1R; 1898 if (type & KVMPPC_DEBUG_WATCH_WRITE) 1899 dbg_reg->dbcr0 |= DBCR0_DAC1W; 1900 dbg_reg->dac1 = addr; 1901 break; 1902 case 1: 1903 if (type & KVMPPC_DEBUG_WATCH_READ) 1904 dbg_reg->dbcr0 |= DBCR0_DAC2R; 1905 if (type & KVMPPC_DEBUG_WATCH_WRITE) 1906 dbg_reg->dbcr0 |= DBCR0_DAC2W; 1907 dbg_reg->dac2 = addr; 1908 break; 1909 default: 1910 return -EINVAL; 1911 } 1912 1913 dbg_reg->dbcr0 |= DBCR0_IDM; 1914 return 0; 1915 } 1916 void kvm_guest_protect_msr(struct kvm_vcpu *vcpu, ulong prot_bitmap, bool set) 1917 { 1918 /* XXX: Add similar MSR protection for BookE-PR */ 1919 #ifdef CONFIG_KVM_BOOKE_HV 1920 BUG_ON(prot_bitmap & ~(MSRP_UCLEP | MSRP_DEP | MSRP_PMMP)); 1921 if (set) { 1922 if (prot_bitmap & MSR_UCLE) 1923 vcpu->arch.shadow_msrp |= MSRP_UCLEP; 1924 if (prot_bitmap & MSR_DE) 1925 vcpu->arch.shadow_msrp |= MSRP_DEP; 1926 if (prot_bitmap & MSR_PMM) 1927 vcpu->arch.shadow_msrp |= MSRP_PMMP; 1928 } else { 1929 if (prot_bitmap & MSR_UCLE) 1930 vcpu->arch.shadow_msrp &= ~MSRP_UCLEP; 1931 if (prot_bitmap & MSR_DE) 1932 vcpu->arch.shadow_msrp &= ~MSRP_DEP; 1933 if (prot_bitmap & MSR_PMM) 1934 vcpu->arch.shadow_msrp &= ~MSRP_PMMP; 1935 } 1936 #endif 1937 } 1938 1939 int kvmppc_xlate(struct kvm_vcpu *vcpu, ulong eaddr, enum xlate_instdata xlid, 1940 enum xlate_readwrite xlrw, struct kvmppc_pte *pte) 1941 { 1942 int gtlb_index; 1943 gpa_t gpaddr; 1944 1945 #ifdef CONFIG_KVM_E500V2 1946 if (!(vcpu->arch.shared->msr & MSR_PR) && 1947 (eaddr & PAGE_MASK) == vcpu->arch.magic_page_ea) { 1948 pte->eaddr = eaddr; 1949 pte->raddr = (vcpu->arch.magic_page_pa & PAGE_MASK) | 1950 (eaddr & ~PAGE_MASK); 1951 pte->vpage = eaddr >> PAGE_SHIFT; 1952 pte->may_read = true; 1953 pte->may_write = true; 1954 pte->may_execute = true; 1955 1956 return 0; 1957 } 1958 #endif 1959 1960 /* Check the guest TLB. */ 1961 switch (xlid) { 1962 case XLATE_INST: 1963 gtlb_index = kvmppc_mmu_itlb_index(vcpu, eaddr); 1964 break; 1965 case XLATE_DATA: 1966 gtlb_index = kvmppc_mmu_dtlb_index(vcpu, eaddr); 1967 break; 1968 default: 1969 BUG(); 1970 } 1971 1972 /* Do we have a TLB entry at all? */ 1973 if (gtlb_index < 0) 1974 return -ENOENT; 1975 1976 gpaddr = kvmppc_mmu_xlate(vcpu, gtlb_index, eaddr); 1977 1978 pte->eaddr = eaddr; 1979 pte->raddr = (gpaddr & PAGE_MASK) | (eaddr & ~PAGE_MASK); 1980 pte->vpage = eaddr >> PAGE_SHIFT; 1981 1982 /* XXX read permissions from the guest TLB */ 1983 pte->may_read = true; 1984 pte->may_write = true; 1985 pte->may_execute = true; 1986 1987 return 0; 1988 } 1989 1990 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, 1991 struct kvm_guest_debug *dbg) 1992 { 1993 struct debug_reg *dbg_reg; 1994 int n, b = 0, w = 0; 1995 1996 if (!(dbg->control & KVM_GUESTDBG_ENABLE)) { 1997 vcpu->arch.dbg_reg.dbcr0 = 0; 1998 vcpu->guest_debug = 0; 1999 kvm_guest_protect_msr(vcpu, MSR_DE, false); 2000 return 0; 2001 } 2002 2003 kvm_guest_protect_msr(vcpu, MSR_DE, true); 2004 vcpu->guest_debug = dbg->control; 2005 vcpu->arch.dbg_reg.dbcr0 = 0; 2006 2007 if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) 2008 vcpu->arch.dbg_reg.dbcr0 |= DBCR0_IDM | DBCR0_IC; 2009 2010 /* Code below handles only HW breakpoints */ 2011 dbg_reg = &(vcpu->arch.dbg_reg); 2012 2013 #ifdef CONFIG_KVM_BOOKE_HV 2014 /* 2015 * On BookE-HV (e500mc) the guest is always executed with MSR.GS=1 2016 * DBCR1 and DBCR2 are set to trigger debug events when MSR.PR is 0 2017 */ 2018 dbg_reg->dbcr1 = 0; 2019 dbg_reg->dbcr2 = 0; 2020 #else 2021 /* 2022 * On BookE-PR (e500v2) the guest is always executed with MSR.PR=1 2023 * We set DBCR1 and DBCR2 to only trigger debug events when MSR.PR 2024 * is set. 2025 */ 2026 dbg_reg->dbcr1 = DBCR1_IAC1US | DBCR1_IAC2US | DBCR1_IAC3US | 2027 DBCR1_IAC4US; 2028 dbg_reg->dbcr2 = DBCR2_DAC1US | DBCR2_DAC2US; 2029 #endif 2030 2031 if (!(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)) 2032 return 0; 2033 2034 for (n = 0; n < (KVMPPC_BOOKE_IAC_NUM + KVMPPC_BOOKE_DAC_NUM); n++) { 2035 uint64_t addr = dbg->arch.bp[n].addr; 2036 uint32_t type = dbg->arch.bp[n].type; 2037 2038 if (type == KVMPPC_DEBUG_NONE) 2039 continue; 2040 2041 if (type & !(KVMPPC_DEBUG_WATCH_READ | 2042 KVMPPC_DEBUG_WATCH_WRITE | 2043 KVMPPC_DEBUG_BREAKPOINT)) 2044 return -EINVAL; 2045 2046 if (type & KVMPPC_DEBUG_BREAKPOINT) { 2047 /* Setting H/W breakpoint */ 2048 if (kvmppc_booke_add_breakpoint(dbg_reg, addr, b++)) 2049 return -EINVAL; 2050 } else { 2051 /* Setting H/W watchpoint */ 2052 if (kvmppc_booke_add_watchpoint(dbg_reg, addr, 2053 type, w++)) 2054 return -EINVAL; 2055 } 2056 } 2057 2058 return 0; 2059 } 2060 2061 void kvmppc_booke_vcpu_load(struct kvm_vcpu *vcpu, int cpu) 2062 { 2063 vcpu->cpu = smp_processor_id(); 2064 current->thread.kvm_vcpu = vcpu; 2065 } 2066 2067 void kvmppc_booke_vcpu_put(struct kvm_vcpu *vcpu) 2068 { 2069 current->thread.kvm_vcpu = NULL; 2070 vcpu->cpu = -1; 2071 2072 /* Clear pending debug event in DBSR */ 2073 kvmppc_clear_dbsr(); 2074 } 2075 2076 void kvmppc_mmu_destroy(struct kvm_vcpu *vcpu) 2077 { 2078 vcpu->kvm->arch.kvm_ops->mmu_destroy(vcpu); 2079 } 2080 2081 int kvmppc_core_init_vm(struct kvm *kvm) 2082 { 2083 return kvm->arch.kvm_ops->init_vm(kvm); 2084 } 2085 2086 struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm *kvm, unsigned int id) 2087 { 2088 return kvm->arch.kvm_ops->vcpu_create(kvm, id); 2089 } 2090 2091 void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu) 2092 { 2093 vcpu->kvm->arch.kvm_ops->vcpu_free(vcpu); 2094 } 2095 2096 void kvmppc_core_destroy_vm(struct kvm *kvm) 2097 { 2098 kvm->arch.kvm_ops->destroy_vm(kvm); 2099 } 2100 2101 void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu) 2102 { 2103 vcpu->kvm->arch.kvm_ops->vcpu_load(vcpu, cpu); 2104 } 2105 2106 void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu) 2107 { 2108 vcpu->kvm->arch.kvm_ops->vcpu_put(vcpu); 2109 } 2110 2111 int __init kvmppc_booke_init(void) 2112 { 2113 #ifndef CONFIG_KVM_BOOKE_HV 2114 unsigned long ivor[16]; 2115 unsigned long *handler = kvmppc_booke_handler_addr; 2116 unsigned long max_ivor = 0; 2117 unsigned long handler_len; 2118 int i; 2119 2120 /* We install our own exception handlers by hijacking IVPR. IVPR must 2121 * be 16-bit aligned, so we need a 64KB allocation. */ 2122 kvmppc_booke_handlers = __get_free_pages(GFP_KERNEL | __GFP_ZERO, 2123 VCPU_SIZE_ORDER); 2124 if (!kvmppc_booke_handlers) 2125 return -ENOMEM; 2126 2127 /* XXX make sure our handlers are smaller than Linux's */ 2128 2129 /* Copy our interrupt handlers to match host IVORs. That way we don't 2130 * have to swap the IVORs on every guest/host transition. */ 2131 ivor[0] = mfspr(SPRN_IVOR0); 2132 ivor[1] = mfspr(SPRN_IVOR1); 2133 ivor[2] = mfspr(SPRN_IVOR2); 2134 ivor[3] = mfspr(SPRN_IVOR3); 2135 ivor[4] = mfspr(SPRN_IVOR4); 2136 ivor[5] = mfspr(SPRN_IVOR5); 2137 ivor[6] = mfspr(SPRN_IVOR6); 2138 ivor[7] = mfspr(SPRN_IVOR7); 2139 ivor[8] = mfspr(SPRN_IVOR8); 2140 ivor[9] = mfspr(SPRN_IVOR9); 2141 ivor[10] = mfspr(SPRN_IVOR10); 2142 ivor[11] = mfspr(SPRN_IVOR11); 2143 ivor[12] = mfspr(SPRN_IVOR12); 2144 ivor[13] = mfspr(SPRN_IVOR13); 2145 ivor[14] = mfspr(SPRN_IVOR14); 2146 ivor[15] = mfspr(SPRN_IVOR15); 2147 2148 for (i = 0; i < 16; i++) { 2149 if (ivor[i] > max_ivor) 2150 max_ivor = i; 2151 2152 handler_len = handler[i + 1] - handler[i]; 2153 memcpy((void *)kvmppc_booke_handlers + ivor[i], 2154 (void *)handler[i], handler_len); 2155 } 2156 2157 handler_len = handler[max_ivor + 1] - handler[max_ivor]; 2158 flush_icache_range(kvmppc_booke_handlers, kvmppc_booke_handlers + 2159 ivor[max_ivor] + handler_len); 2160 #endif /* !BOOKE_HV */ 2161 return 0; 2162 } 2163 2164 void __exit kvmppc_booke_exit(void) 2165 { 2166 free_pages(kvmppc_booke_handlers, VCPU_SIZE_ORDER); 2167 kvm_exit(); 2168 } 2169