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/arch/powerpc/kvm/booke.c

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   1// SPDX-License-Identifier: GPL-2.0-only
   2/*
   3 *
   4 * Copyright IBM Corp. 2007
   5 * Copyright 2010-2011 Freescale Semiconductor, Inc.
   6 *
   7 * Authors: Hollis Blanchard <hollisb@us.ibm.com>
   8 *          Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
   9 *          Scott Wood <scottwood@freescale.com>
  10 *          Varun Sethi <varun.sethi@freescale.com>
  11 */
  12
  13#include <linux/errno.h>
  14#include <linux/err.h>
  15#include <linux/kvm_host.h>
  16#include <linux/gfp.h>
  17#include <linux/module.h>
  18#include <linux/vmalloc.h>
  19#include <linux/fs.h>
  20
  21#include <asm/cputable.h>
  22#include <linux/uaccess.h>
  23#include <asm/kvm_ppc.h>
  24#include <asm/cacheflush.h>
  25#include <asm/dbell.h>
  26#include <asm/hw_irq.h>
  27#include <asm/irq.h>
  28#include <asm/time.h>
  29
  30#include "timing.h"
  31#include "booke.h"
  32
  33#define CREATE_TRACE_POINTS
  34#include "trace_booke.h"
  35
  36unsigned long kvmppc_booke_handlers;
  37
  38#define VM_STAT(x) offsetof(struct kvm, stat.x), KVM_STAT_VM
  39#define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU
  40
  41struct kvm_stats_debugfs_item debugfs_entries[] = {
  42	{ "mmio",       VCPU_STAT(mmio_exits) },
  43	{ "sig",        VCPU_STAT(signal_exits) },
  44	{ "itlb_r",     VCPU_STAT(itlb_real_miss_exits) },
  45	{ "itlb_v",     VCPU_STAT(itlb_virt_miss_exits) },
  46	{ "dtlb_r",     VCPU_STAT(dtlb_real_miss_exits) },
  47	{ "dtlb_v",     VCPU_STAT(dtlb_virt_miss_exits) },
  48	{ "sysc",       VCPU_STAT(syscall_exits) },
  49	{ "isi",        VCPU_STAT(isi_exits) },
  50	{ "dsi",        VCPU_STAT(dsi_exits) },
  51	{ "inst_emu",   VCPU_STAT(emulated_inst_exits) },
  52	{ "dec",        VCPU_STAT(dec_exits) },
  53	{ "ext_intr",   VCPU_STAT(ext_intr_exits) },
  54	{ "halt_successful_poll", VCPU_STAT(halt_successful_poll) },
  55	{ "halt_attempted_poll", VCPU_STAT(halt_attempted_poll) },
  56	{ "halt_poll_invalid", VCPU_STAT(halt_poll_invalid) },
  57	{ "halt_wakeup", VCPU_STAT(halt_wakeup) },
  58	{ "doorbell", VCPU_STAT(dbell_exits) },
  59	{ "guest doorbell", VCPU_STAT(gdbell_exits) },
  60	{ "remote_tlb_flush", VM_STAT(remote_tlb_flush) },
  61	{ NULL }
  62};
  63
  64/* TODO: use vcpu_printf() */
  65void kvmppc_dump_vcpu(struct kvm_vcpu *vcpu)
  66{
  67	int i;
  68
  69	printk("pc:   %08lx msr:  %08llx\n", vcpu->arch.regs.nip,
  70			vcpu->arch.shared->msr);
  71	printk("lr:   %08lx ctr:  %08lx\n", vcpu->arch.regs.link,
  72			vcpu->arch.regs.ctr);
  73	printk("srr0: %08llx srr1: %08llx\n", vcpu->arch.shared->srr0,
  74					    vcpu->arch.shared->srr1);
  75
  76	printk("exceptions: %08lx\n", vcpu->arch.pending_exceptions);
  77
  78	for (i = 0; i < 32; i += 4) {
  79		printk("gpr%02d: %08lx %08lx %08lx %08lx\n", i,
  80		       kvmppc_get_gpr(vcpu, i),
  81		       kvmppc_get_gpr(vcpu, i+1),
  82		       kvmppc_get_gpr(vcpu, i+2),
  83		       kvmppc_get_gpr(vcpu, i+3));
  84	}
  85}
  86
  87#ifdef CONFIG_SPE
  88void kvmppc_vcpu_disable_spe(struct kvm_vcpu *vcpu)
  89{
  90	preempt_disable();
  91	enable_kernel_spe();
  92	kvmppc_save_guest_spe(vcpu);
  93	disable_kernel_spe();
  94	vcpu->arch.shadow_msr &= ~MSR_SPE;
  95	preempt_enable();
  96}
  97
  98static void kvmppc_vcpu_enable_spe(struct kvm_vcpu *vcpu)
  99{
 100	preempt_disable();
 101	enable_kernel_spe();
 102	kvmppc_load_guest_spe(vcpu);
 103	disable_kernel_spe();
 104	vcpu->arch.shadow_msr |= MSR_SPE;
 105	preempt_enable();
 106}
 107
 108static void kvmppc_vcpu_sync_spe(struct kvm_vcpu *vcpu)
 109{
 110	if (vcpu->arch.shared->msr & MSR_SPE) {
 111		if (!(vcpu->arch.shadow_msr & MSR_SPE))
 112			kvmppc_vcpu_enable_spe(vcpu);
 113	} else if (vcpu->arch.shadow_msr & MSR_SPE) {
 114		kvmppc_vcpu_disable_spe(vcpu);
 115	}
 116}
 117#else
 118static void kvmppc_vcpu_sync_spe(struct kvm_vcpu *vcpu)
 119{
 120}
 121#endif
 122
 123/*
 124 * Load up guest vcpu FP state if it's needed.
 125 * It also set the MSR_FP in thread so that host know
 126 * we're holding FPU, and then host can help to save
 127 * guest vcpu FP state if other threads require to use FPU.
 128 * This simulates an FP unavailable fault.
 129 *
 130 * It requires to be called with preemption disabled.
 131 */
 132static inline void kvmppc_load_guest_fp(struct kvm_vcpu *vcpu)
 133{
 134#ifdef CONFIG_PPC_FPU
 135	if (!(current->thread.regs->msr & MSR_FP)) {
 136		enable_kernel_fp();
 137		load_fp_state(&vcpu->arch.fp);
 138		disable_kernel_fp();
 139		current->thread.fp_save_area = &vcpu->arch.fp;
 140		current->thread.regs->msr |= MSR_FP;
 141	}
 142#endif
 143}
 144
 145/*
 146 * Save guest vcpu FP state into thread.
 147 * It requires to be called with preemption disabled.
 148 */
 149static inline void kvmppc_save_guest_fp(struct kvm_vcpu *vcpu)
 150{
 151#ifdef CONFIG_PPC_FPU
 152	if (current->thread.regs->msr & MSR_FP)
 153		giveup_fpu(current);
 154	current->thread.fp_save_area = NULL;
 155#endif
 156}
 157
 158static void kvmppc_vcpu_sync_fpu(struct kvm_vcpu *vcpu)
 159{
 160#if defined(CONFIG_PPC_FPU) && !defined(CONFIG_KVM_BOOKE_HV)
 161	/* We always treat the FP bit as enabled from the host
 162	   perspective, so only need to adjust the shadow MSR */
 163	vcpu->arch.shadow_msr &= ~MSR_FP;
 164	vcpu->arch.shadow_msr |= vcpu->arch.shared->msr & MSR_FP;
 165#endif
 166}
 167
 168/*
 169 * Simulate AltiVec unavailable fault to load guest state
 170 * from thread to AltiVec unit.
 171 * It requires to be called with preemption disabled.
 172 */
 173static inline void kvmppc_load_guest_altivec(struct kvm_vcpu *vcpu)
 174{
 175#ifdef CONFIG_ALTIVEC
 176	if (cpu_has_feature(CPU_FTR_ALTIVEC)) {
 177		if (!(current->thread.regs->msr & MSR_VEC)) {
 178			enable_kernel_altivec();
 179			load_vr_state(&vcpu->arch.vr);
 180			disable_kernel_altivec();
 181			current->thread.vr_save_area = &vcpu->arch.vr;
 182			current->thread.regs->msr |= MSR_VEC;
 183		}
 184	}
 185#endif
 186}
 187
 188/*
 189 * Save guest vcpu AltiVec state into thread.
 190 * It requires to be called with preemption disabled.
 191 */
 192static inline void kvmppc_save_guest_altivec(struct kvm_vcpu *vcpu)
 193{
 194#ifdef CONFIG_ALTIVEC
 195	if (cpu_has_feature(CPU_FTR_ALTIVEC)) {
 196		if (current->thread.regs->msr & MSR_VEC)
 197			giveup_altivec(current);
 198		current->thread.vr_save_area = NULL;
 199	}
 200#endif
 201}
 202
 203static void kvmppc_vcpu_sync_debug(struct kvm_vcpu *vcpu)
 204{
 205	/* Synchronize guest's desire to get debug interrupts into shadow MSR */
 206#ifndef CONFIG_KVM_BOOKE_HV
 207	vcpu->arch.shadow_msr &= ~MSR_DE;
 208	vcpu->arch.shadow_msr |= vcpu->arch.shared->msr & MSR_DE;
 209#endif
 210
 211	/* Force enable debug interrupts when user space wants to debug */
 212	if (vcpu->guest_debug) {
 213#ifdef CONFIG_KVM_BOOKE_HV
 214		/*
 215		 * Since there is no shadow MSR, sync MSR_DE into the guest
 216		 * visible MSR.
 217		 */
 218		vcpu->arch.shared->msr |= MSR_DE;
 219#else
 220		vcpu->arch.shadow_msr |= MSR_DE;
 221		vcpu->arch.shared->msr &= ~MSR_DE;
 222#endif
 223	}
 224}
 225
 226/*
 227 * Helper function for "full" MSR writes.  No need to call this if only
 228 * EE/CE/ME/DE/RI are changing.
 229 */
 230void kvmppc_set_msr(struct kvm_vcpu *vcpu, u32 new_msr)
 231{
 232	u32 old_msr = vcpu->arch.shared->msr;
 233
 234#ifdef CONFIG_KVM_BOOKE_HV
 235	new_msr |= MSR_GS;
 236#endif
 237
 238	vcpu->arch.shared->msr = new_msr;
 239
 240	kvmppc_mmu_msr_notify(vcpu, old_msr);
 241	kvmppc_vcpu_sync_spe(vcpu);
 242	kvmppc_vcpu_sync_fpu(vcpu);
 243	kvmppc_vcpu_sync_debug(vcpu);
 244}
 245
 246static void kvmppc_booke_queue_irqprio(struct kvm_vcpu *vcpu,
 247                                       unsigned int priority)
 248{
 249	trace_kvm_booke_queue_irqprio(vcpu, priority);
 250	set_bit(priority, &vcpu->arch.pending_exceptions);
 251}
 252
 253void kvmppc_core_queue_dtlb_miss(struct kvm_vcpu *vcpu,
 254				 ulong dear_flags, ulong esr_flags)
 255{
 256	vcpu->arch.queued_dear = dear_flags;
 257	vcpu->arch.queued_esr = esr_flags;
 258	kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DTLB_MISS);
 259}
 260
 261void kvmppc_core_queue_data_storage(struct kvm_vcpu *vcpu,
 262				    ulong dear_flags, ulong esr_flags)
 263{
 264	vcpu->arch.queued_dear = dear_flags;
 265	vcpu->arch.queued_esr = esr_flags;
 266	kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DATA_STORAGE);
 267}
 268
 269void kvmppc_core_queue_itlb_miss(struct kvm_vcpu *vcpu)
 270{
 271	kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ITLB_MISS);
 272}
 273
 274void kvmppc_core_queue_inst_storage(struct kvm_vcpu *vcpu, ulong esr_flags)
 275{
 276	vcpu->arch.queued_esr = esr_flags;
 277	kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_INST_STORAGE);
 278}
 279
 280static void kvmppc_core_queue_alignment(struct kvm_vcpu *vcpu, ulong dear_flags,
 281					ulong esr_flags)
 282{
 283	vcpu->arch.queued_dear = dear_flags;
 284	vcpu->arch.queued_esr = esr_flags;
 285	kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ALIGNMENT);
 286}
 287
 288void kvmppc_core_queue_program(struct kvm_vcpu *vcpu, ulong esr_flags)
 289{
 290	vcpu->arch.queued_esr = esr_flags;
 291	kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_PROGRAM);
 292}
 293
 294void kvmppc_core_queue_fpunavail(struct kvm_vcpu *vcpu)
 295{
 296	kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_FP_UNAVAIL);
 297}
 298
 299#ifdef CONFIG_ALTIVEC
 300void kvmppc_core_queue_vec_unavail(struct kvm_vcpu *vcpu)
 301{
 302	kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ALTIVEC_UNAVAIL);
 303}
 304#endif
 305
 306void kvmppc_core_queue_dec(struct kvm_vcpu *vcpu)
 307{
 308	kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DECREMENTER);
 309}
 310
 311int kvmppc_core_pending_dec(struct kvm_vcpu *vcpu)
 312{
 313	return test_bit(BOOKE_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions);
 314}
 315
 316void kvmppc_core_dequeue_dec(struct kvm_vcpu *vcpu)
 317{
 318	clear_bit(BOOKE_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions);
 319}
 320
 321void kvmppc_core_queue_external(struct kvm_vcpu *vcpu,
 322                                struct kvm_interrupt *irq)
 323{
 324	unsigned int prio = BOOKE_IRQPRIO_EXTERNAL;
 325
 326	if (irq->irq == KVM_INTERRUPT_SET_LEVEL)
 327		prio = BOOKE_IRQPRIO_EXTERNAL_LEVEL;
 328
 329	kvmppc_booke_queue_irqprio(vcpu, prio);
 330}
 331
 332void kvmppc_core_dequeue_external(struct kvm_vcpu *vcpu)
 333{
 334	clear_bit(BOOKE_IRQPRIO_EXTERNAL, &vcpu->arch.pending_exceptions);
 335	clear_bit(BOOKE_IRQPRIO_EXTERNAL_LEVEL, &vcpu->arch.pending_exceptions);
 336}
 337
 338static void kvmppc_core_queue_watchdog(struct kvm_vcpu *vcpu)
 339{
 340	kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_WATCHDOG);
 341}
 342
 343static void kvmppc_core_dequeue_watchdog(struct kvm_vcpu *vcpu)
 344{
 345	clear_bit(BOOKE_IRQPRIO_WATCHDOG, &vcpu->arch.pending_exceptions);
 346}
 347
 348void kvmppc_core_queue_debug(struct kvm_vcpu *vcpu)
 349{
 350	kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DEBUG);
 351}
 352
 353void kvmppc_core_dequeue_debug(struct kvm_vcpu *vcpu)
 354{
 355	clear_bit(BOOKE_IRQPRIO_DEBUG, &vcpu->arch.pending_exceptions);
 356}
 357
 358static void set_guest_srr(struct kvm_vcpu *vcpu, unsigned long srr0, u32 srr1)
 359{
 360	kvmppc_set_srr0(vcpu, srr0);
 361	kvmppc_set_srr1(vcpu, srr1);
 362}
 363
 364static void set_guest_csrr(struct kvm_vcpu *vcpu, unsigned long srr0, u32 srr1)
 365{
 366	vcpu->arch.csrr0 = srr0;
 367	vcpu->arch.csrr1 = srr1;
 368}
 369
 370static void set_guest_dsrr(struct kvm_vcpu *vcpu, unsigned long srr0, u32 srr1)
 371{
 372	if (cpu_has_feature(CPU_FTR_DEBUG_LVL_EXC)) {
 373		vcpu->arch.dsrr0 = srr0;
 374		vcpu->arch.dsrr1 = srr1;
 375	} else {
 376		set_guest_csrr(vcpu, srr0, srr1);
 377	}
 378}
 379
 380static void set_guest_mcsrr(struct kvm_vcpu *vcpu, unsigned long srr0, u32 srr1)
 381{
 382	vcpu->arch.mcsrr0 = srr0;
 383	vcpu->arch.mcsrr1 = srr1;
 384}
 385
 386/* Deliver the interrupt of the corresponding priority, if possible. */
 387static int kvmppc_booke_irqprio_deliver(struct kvm_vcpu *vcpu,
 388                                        unsigned int priority)
 389{
 390	int allowed = 0;
 391	ulong msr_mask = 0;
 392	bool update_esr = false, update_dear = false, update_epr = false;
 393	ulong crit_raw = vcpu->arch.shared->critical;
 394	ulong crit_r1 = kvmppc_get_gpr(vcpu, 1);
 395	bool crit;
 396	bool keep_irq = false;
 397	enum int_class int_class;
 398	ulong new_msr = vcpu->arch.shared->msr;
 399
 400	/* Truncate crit indicators in 32 bit mode */
 401	if (!(vcpu->arch.shared->msr & MSR_SF)) {
 402		crit_raw &= 0xffffffff;
 403		crit_r1 &= 0xffffffff;
 404	}
 405
 406	/* Critical section when crit == r1 */
 407	crit = (crit_raw == crit_r1);
 408	/* ... and we're in supervisor mode */
 409	crit = crit && !(vcpu->arch.shared->msr & MSR_PR);
 410
 411	if (priority == BOOKE_IRQPRIO_EXTERNAL_LEVEL) {
 412		priority = BOOKE_IRQPRIO_EXTERNAL;
 413		keep_irq = true;
 414	}
 415
 416	if ((priority == BOOKE_IRQPRIO_EXTERNAL) && vcpu->arch.epr_flags)
 417		update_epr = true;
 418
 419	switch (priority) {
 420	case BOOKE_IRQPRIO_DTLB_MISS:
 421	case BOOKE_IRQPRIO_DATA_STORAGE:
 422	case BOOKE_IRQPRIO_ALIGNMENT:
 423		update_dear = true;
 424		fallthrough;
 425	case BOOKE_IRQPRIO_INST_STORAGE:
 426	case BOOKE_IRQPRIO_PROGRAM:
 427		update_esr = true;
 428		fallthrough;
 429	case BOOKE_IRQPRIO_ITLB_MISS:
 430	case BOOKE_IRQPRIO_SYSCALL:
 431	case BOOKE_IRQPRIO_FP_UNAVAIL:
 432#ifdef CONFIG_SPE_POSSIBLE
 433	case BOOKE_IRQPRIO_SPE_UNAVAIL:
 434	case BOOKE_IRQPRIO_SPE_FP_DATA:
 435	case BOOKE_IRQPRIO_SPE_FP_ROUND:
 436#endif
 437#ifdef CONFIG_ALTIVEC
 438	case BOOKE_IRQPRIO_ALTIVEC_UNAVAIL:
 439	case BOOKE_IRQPRIO_ALTIVEC_ASSIST:
 440#endif
 441	case BOOKE_IRQPRIO_AP_UNAVAIL:
 442		allowed = 1;
 443		msr_mask = MSR_CE | MSR_ME | MSR_DE;
 444		int_class = INT_CLASS_NONCRIT;
 445		break;
 446	case BOOKE_IRQPRIO_WATCHDOG:
 447	case BOOKE_IRQPRIO_CRITICAL:
 448	case BOOKE_IRQPRIO_DBELL_CRIT:
 449		allowed = vcpu->arch.shared->msr & MSR_CE;
 450		allowed = allowed && !crit;
 451		msr_mask = MSR_ME;
 452		int_class = INT_CLASS_CRIT;
 453		break;
 454	case BOOKE_IRQPRIO_MACHINE_CHECK:
 455		allowed = vcpu->arch.shared->msr & MSR_ME;
 456		allowed = allowed && !crit;
 457		int_class = INT_CLASS_MC;
 458		break;
 459	case BOOKE_IRQPRIO_DECREMENTER:
 460	case BOOKE_IRQPRIO_FIT:
 461		keep_irq = true;
 462		fallthrough;
 463	case BOOKE_IRQPRIO_EXTERNAL:
 464	case BOOKE_IRQPRIO_DBELL:
 465		allowed = vcpu->arch.shared->msr & MSR_EE;
 466		allowed = allowed && !crit;
 467		msr_mask = MSR_CE | MSR_ME | MSR_DE;
 468		int_class = INT_CLASS_NONCRIT;
 469		break;
 470	case BOOKE_IRQPRIO_DEBUG:
 471		allowed = vcpu->arch.shared->msr & MSR_DE;
 472		allowed = allowed && !crit;
 473		msr_mask = MSR_ME;
 474		if (cpu_has_feature(CPU_FTR_DEBUG_LVL_EXC))
 475			int_class = INT_CLASS_DBG;
 476		else
 477			int_class = INT_CLASS_CRIT;
 478
 479		break;
 480	}
 481
 482	if (allowed) {
 483		switch (int_class) {
 484		case INT_CLASS_NONCRIT:
 485			set_guest_srr(vcpu, vcpu->arch.regs.nip,
 486				      vcpu->arch.shared->msr);
 487			break;
 488		case INT_CLASS_CRIT:
 489			set_guest_csrr(vcpu, vcpu->arch.regs.nip,
 490				       vcpu->arch.shared->msr);
 491			break;
 492		case INT_CLASS_DBG:
 493			set_guest_dsrr(vcpu, vcpu->arch.regs.nip,
 494				       vcpu->arch.shared->msr);
 495			break;
 496		case INT_CLASS_MC:
 497			set_guest_mcsrr(vcpu, vcpu->arch.regs.nip,
 498					vcpu->arch.shared->msr);
 499			break;
 500		}
 501
 502		vcpu->arch.regs.nip = vcpu->arch.ivpr |
 503					vcpu->arch.ivor[priority];
 504		if (update_esr == true)
 505			kvmppc_set_esr(vcpu, vcpu->arch.queued_esr);
 506		if (update_dear == true)
 507			kvmppc_set_dar(vcpu, vcpu->arch.queued_dear);
 508		if (update_epr == true) {
 509			if (vcpu->arch.epr_flags & KVMPPC_EPR_USER)
 510				kvm_make_request(KVM_REQ_EPR_EXIT, vcpu);
 511			else if (vcpu->arch.epr_flags & KVMPPC_EPR_KERNEL) {
 512				BUG_ON(vcpu->arch.irq_type != KVMPPC_IRQ_MPIC);
 513				kvmppc_mpic_set_epr(vcpu);
 514			}
 515		}
 516
 517		new_msr &= msr_mask;
 518#if defined(CONFIG_64BIT)
 519		if (vcpu->arch.epcr & SPRN_EPCR_ICM)
 520			new_msr |= MSR_CM;
 521#endif
 522		kvmppc_set_msr(vcpu, new_msr);
 523
 524		if (!keep_irq)
 525			clear_bit(priority, &vcpu->arch.pending_exceptions);
 526	}
 527
 528#ifdef CONFIG_KVM_BOOKE_HV
 529	/*
 530	 * If an interrupt is pending but masked, raise a guest doorbell
 531	 * so that we are notified when the guest enables the relevant
 532	 * MSR bit.
 533	 */
 534	if (vcpu->arch.pending_exceptions & BOOKE_IRQMASK_EE)
 535		kvmppc_set_pending_interrupt(vcpu, INT_CLASS_NONCRIT);
 536	if (vcpu->arch.pending_exceptions & BOOKE_IRQMASK_CE)
 537		kvmppc_set_pending_interrupt(vcpu, INT_CLASS_CRIT);
 538	if (vcpu->arch.pending_exceptions & BOOKE_IRQPRIO_MACHINE_CHECK)
 539		kvmppc_set_pending_interrupt(vcpu, INT_CLASS_MC);
 540#endif
 541
 542	return allowed;
 543}
 544
 545/*
 546 * Return the number of jiffies until the next timeout.  If the timeout is
 547 * longer than the NEXT_TIMER_MAX_DELTA, then return NEXT_TIMER_MAX_DELTA
 548 * because the larger value can break the timer APIs.
 549 */
 550static unsigned long watchdog_next_timeout(struct kvm_vcpu *vcpu)
 551{
 552	u64 tb, wdt_tb, wdt_ticks = 0;
 553	u64 nr_jiffies = 0;
 554	u32 period = TCR_GET_WP(vcpu->arch.tcr);
 555
 556	wdt_tb = 1ULL << (63 - period);
 557	tb = get_tb();
 558	/*
 559	 * The watchdog timeout will hapeen when TB bit corresponding
 560	 * to watchdog will toggle from 0 to 1.
 561	 */
 562	if (tb & wdt_tb)
 563		wdt_ticks = wdt_tb;
 564
 565	wdt_ticks += wdt_tb - (tb & (wdt_tb - 1));
 566
 567	/* Convert timebase ticks to jiffies */
 568	nr_jiffies = wdt_ticks;
 569
 570	if (do_div(nr_jiffies, tb_ticks_per_jiffy))
 571		nr_jiffies++;
 572
 573	return min_t(unsigned long long, nr_jiffies, NEXT_TIMER_MAX_DELTA);
 574}
 575
 576static void arm_next_watchdog(struct kvm_vcpu *vcpu)
 577{
 578	unsigned long nr_jiffies;
 579	unsigned long flags;
 580
 581	/*
 582	 * If TSR_ENW and TSR_WIS are not set then no need to exit to
 583	 * userspace, so clear the KVM_REQ_WATCHDOG request.
 584	 */
 585	if ((vcpu->arch.tsr & (TSR_ENW | TSR_WIS)) != (TSR_ENW | TSR_WIS))
 586		kvm_clear_request(KVM_REQ_WATCHDOG, vcpu);
 587
 588	spin_lock_irqsave(&vcpu->arch.wdt_lock, flags);
 589	nr_jiffies = watchdog_next_timeout(vcpu);
 590	/*
 591	 * If the number of jiffies of watchdog timer >= NEXT_TIMER_MAX_DELTA
 592	 * then do not run the watchdog timer as this can break timer APIs.
 593	 */
 594	if (nr_jiffies < NEXT_TIMER_MAX_DELTA)
 595		mod_timer(&vcpu->arch.wdt_timer, jiffies + nr_jiffies);
 596	else
 597		del_timer(&vcpu->arch.wdt_timer);
 598	spin_unlock_irqrestore(&vcpu->arch.wdt_lock, flags);
 599}
 600
 601void kvmppc_watchdog_func(struct timer_list *t)
 602{
 603	struct kvm_vcpu *vcpu = from_timer(vcpu, t, arch.wdt_timer);
 604	u32 tsr, new_tsr;
 605	int final;
 606
 607	do {
 608		new_tsr = tsr = vcpu->arch.tsr;
 609		final = 0;
 610
 611		/* Time out event */
 612		if (tsr & TSR_ENW) {
 613			if (tsr & TSR_WIS)
 614				final = 1;
 615			else
 616				new_tsr = tsr | TSR_WIS;
 617		} else {
 618			new_tsr = tsr | TSR_ENW;
 619		}
 620	} while (cmpxchg(&vcpu->arch.tsr, tsr, new_tsr) != tsr);
 621
 622	if (new_tsr & TSR_WIS) {
 623		smp_wmb();
 624		kvm_make_request(KVM_REQ_PENDING_TIMER, vcpu);
 625		kvm_vcpu_kick(vcpu);
 626	}
 627
 628	/*
 629	 * If this is final watchdog expiry and some action is required
 630	 * then exit to userspace.
 631	 */
 632	if (final && (vcpu->arch.tcr & TCR_WRC_MASK) &&
 633	    vcpu->arch.watchdog_enabled) {
 634		smp_wmb();
 635		kvm_make_request(KVM_REQ_WATCHDOG, vcpu);
 636		kvm_vcpu_kick(vcpu);
 637	}
 638
 639	/*
 640	 * Stop running the watchdog timer after final expiration to
 641	 * prevent the host from being flooded with timers if the
 642	 * guest sets a short period.
 643	 * Timers will resume when TSR/TCR is updated next time.
 644	 */
 645	if (!final)
 646		arm_next_watchdog(vcpu);
 647}
 648
 649static void update_timer_ints(struct kvm_vcpu *vcpu)
 650{
 651	if ((vcpu->arch.tcr & TCR_DIE) && (vcpu->arch.tsr & TSR_DIS))
 652		kvmppc_core_queue_dec(vcpu);
 653	else
 654		kvmppc_core_dequeue_dec(vcpu);
 655
 656	if ((vcpu->arch.tcr & TCR_WIE) && (vcpu->arch.tsr & TSR_WIS))
 657		kvmppc_core_queue_watchdog(vcpu);
 658	else
 659		kvmppc_core_dequeue_watchdog(vcpu);
 660}
 661
 662static void kvmppc_core_check_exceptions(struct kvm_vcpu *vcpu)
 663{
 664	unsigned long *pending = &vcpu->arch.pending_exceptions;
 665	unsigned int priority;
 666
 667	priority = __ffs(*pending);
 668	while (priority < BOOKE_IRQPRIO_MAX) {
 669		if (kvmppc_booke_irqprio_deliver(vcpu, priority))
 670			break;
 671
 672		priority = find_next_bit(pending,
 673		                         BITS_PER_BYTE * sizeof(*pending),
 674		                         priority + 1);
 675	}
 676
 677	/* Tell the guest about our interrupt status */
 678	vcpu->arch.shared->int_pending = !!*pending;
 679}
 680
 681/* Check pending exceptions and deliver one, if possible. */
 682int kvmppc_core_prepare_to_enter(struct kvm_vcpu *vcpu)
 683{
 684	int r = 0;
 685	WARN_ON_ONCE(!irqs_disabled());
 686
 687	kvmppc_core_check_exceptions(vcpu);
 688
 689	if (kvm_request_pending(vcpu)) {
 690		/* Exception delivery raised request; start over */
 691		return 1;
 692	}
 693
 694	if (vcpu->arch.shared->msr & MSR_WE) {
 695		local_irq_enable();
 696		kvm_vcpu_block(vcpu);
 697		kvm_clear_request(KVM_REQ_UNHALT, vcpu);
 698		hard_irq_disable();
 699
 700		kvmppc_set_exit_type(vcpu, EMULATED_MTMSRWE_EXITS);
 701		r = 1;
 702	};
 703
 704	return r;
 705}
 706
 707int kvmppc_core_check_requests(struct kvm_vcpu *vcpu)
 708{
 709	int r = 1; /* Indicate we want to get back into the guest */
 710
 711	if (kvm_check_request(KVM_REQ_PENDING_TIMER, vcpu))
 712		update_timer_ints(vcpu);
 713#if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
 714	if (kvm_check_request(KVM_REQ_TLB_FLUSH, vcpu))
 715		kvmppc_core_flush_tlb(vcpu);
 716#endif
 717
 718	if (kvm_check_request(KVM_REQ_WATCHDOG, vcpu)) {
 719		vcpu->run->exit_reason = KVM_EXIT_WATCHDOG;
 720		r = 0;
 721	}
 722
 723	if (kvm_check_request(KVM_REQ_EPR_EXIT, vcpu)) {
 724		vcpu->run->epr.epr = 0;
 725		vcpu->arch.epr_needed = true;
 726		vcpu->run->exit_reason = KVM_EXIT_EPR;
 727		r = 0;
 728	}
 729
 730	return r;
 731}
 732
 733int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
 734{
 735	int ret, s;
 736	struct debug_reg debug;
 737
 738	if (!vcpu->arch.sane) {
 739		kvm_run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
 740		return -EINVAL;
 741	}
 742
 743	s = kvmppc_prepare_to_enter(vcpu);
 744	if (s <= 0) {
 745		ret = s;
 746		goto out;
 747	}
 748	/* interrupts now hard-disabled */
 749
 750#ifdef CONFIG_PPC_FPU
 751	/* Save userspace FPU state in stack */
 752	enable_kernel_fp();
 753
 754	/*
 755	 * Since we can't trap on MSR_FP in GS-mode, we consider the guest
 756	 * as always using the FPU.
 757	 */
 758	kvmppc_load_guest_fp(vcpu);
 759#endif
 760
 761#ifdef CONFIG_ALTIVEC
 762	/* Save userspace AltiVec state in stack */
 763	if (cpu_has_feature(CPU_FTR_ALTIVEC))
 764		enable_kernel_altivec();
 765	/*
 766	 * Since we can't trap on MSR_VEC in GS-mode, we consider the guest
 767	 * as always using the AltiVec.
 768	 */
 769	kvmppc_load_guest_altivec(vcpu);
 770#endif
 771
 772	/* Switch to guest debug context */
 773	debug = vcpu->arch.dbg_reg;
 774	switch_booke_debug_regs(&debug);
 775	debug = current->thread.debug;
 776	current->thread.debug = vcpu->arch.dbg_reg;
 777
 778	vcpu->arch.pgdir = vcpu->kvm->mm->pgd;
 779	kvmppc_fix_ee_before_entry();
 780
 781	ret = __kvmppc_vcpu_run(kvm_run, vcpu);
 782
 783	/* No need for guest_exit. It's done in handle_exit.
 784	   We also get here with interrupts enabled. */
 785
 786	/* Switch back to user space debug context */
 787	switch_booke_debug_regs(&debug);
 788	current->thread.debug = debug;
 789
 790#ifdef CONFIG_PPC_FPU
 791	kvmppc_save_guest_fp(vcpu);
 792#endif
 793
 794#ifdef CONFIG_ALTIVEC
 795	kvmppc_save_guest_altivec(vcpu);
 796#endif
 797
 798out:
 799	vcpu->mode = OUTSIDE_GUEST_MODE;
 800	return ret;
 801}
 802
 803static int emulation_exit(struct kvm_run *run, struct kvm_vcpu *vcpu)
 804{
 805	enum emulation_result er;
 806
 807	er = kvmppc_emulate_instruction(run, vcpu);
 808	switch (er) {
 809	case EMULATE_DONE:
 810		/* don't overwrite subtypes, just account kvm_stats */
 811		kvmppc_account_exit_stat(vcpu, EMULATED_INST_EXITS);
 812		/* Future optimization: only reload non-volatiles if
 813		 * they were actually modified by emulation. */
 814		return RESUME_GUEST_NV;
 815
 816	case EMULATE_AGAIN:
 817		return RESUME_GUEST;
 818
 819	case EMULATE_FAIL:
 820		printk(KERN_CRIT "%s: emulation at %lx failed (%08x)\n",
 821		       __func__, vcpu->arch.regs.nip, vcpu->arch.last_inst);
 822		/* For debugging, encode the failing instruction and
 823		 * report it to userspace. */
 824		run->hw.hardware_exit_reason = ~0ULL << 32;
 825		run->hw.hardware_exit_reason |= vcpu->arch.last_inst;
 826		kvmppc_core_queue_program(vcpu, ESR_PIL);
 827		return RESUME_HOST;
 828
 829	case EMULATE_EXIT_USER:
 830		return RESUME_HOST;
 831
 832	default:
 833		BUG();
 834	}
 835}
 836
 837static int kvmppc_handle_debug(struct kvm_run *run, struct kvm_vcpu *vcpu)
 838{
 839	struct debug_reg *dbg_reg = &(vcpu->arch.dbg_reg);
 840	u32 dbsr = vcpu->arch.dbsr;
 841
 842	if (vcpu->guest_debug == 0) {
 843		/*
 844		 * Debug resources belong to Guest.
 845		 * Imprecise debug event is not injected
 846		 */
 847		if (dbsr & DBSR_IDE) {
 848			dbsr &= ~DBSR_IDE;
 849			if (!dbsr)
 850				return RESUME_GUEST;
 851		}
 852
 853		if (dbsr && (vcpu->arch.shared->msr & MSR_DE) &&
 854			    (vcpu->arch.dbg_reg.dbcr0 & DBCR0_IDM))
 855			kvmppc_core_queue_debug(vcpu);
 856
 857		/* Inject a program interrupt if trap debug is not allowed */
 858		if ((dbsr & DBSR_TIE) && !(vcpu->arch.shared->msr & MSR_DE))
 859			kvmppc_core_queue_program(vcpu, ESR_PTR);
 860
 861		return RESUME_GUEST;
 862	}
 863
 864	/*
 865	 * Debug resource owned by userspace.
 866	 * Clear guest dbsr (vcpu->arch.dbsr)
 867	 */
 868	vcpu->arch.dbsr = 0;
 869	run->debug.arch.status = 0;
 870	run->debug.arch.address = vcpu->arch.regs.nip;
 871
 872	if (dbsr & (DBSR_IAC1 | DBSR_IAC2 | DBSR_IAC3 | DBSR_IAC4)) {
 873		run->debug.arch.status |= KVMPPC_DEBUG_BREAKPOINT;
 874	} else {
 875		if (dbsr & (DBSR_DAC1W | DBSR_DAC2W))
 876			run->debug.arch.status |= KVMPPC_DEBUG_WATCH_WRITE;
 877		else if (dbsr & (DBSR_DAC1R | DBSR_DAC2R))
 878			run->debug.arch.status |= KVMPPC_DEBUG_WATCH_READ;
 879		if (dbsr & (DBSR_DAC1R | DBSR_DAC1W))
 880			run->debug.arch.address = dbg_reg->dac1;
 881		else if (dbsr & (DBSR_DAC2R | DBSR_DAC2W))
 882			run->debug.arch.address = dbg_reg->dac2;
 883	}
 884
 885	return RESUME_HOST;
 886}
 887
 888static void kvmppc_fill_pt_regs(struct pt_regs *regs)
 889{
 890	ulong r1, ip, msr, lr;
 891
 892	asm("mr %0, 1" : "=r"(r1));
 893	asm("mflr %0" : "=r"(lr));
 894	asm("mfmsr %0" : "=r"(msr));
 895	asm("bl 1f; 1: mflr %0" : "=r"(ip));
 896
 897	memset(regs, 0, sizeof(*regs));
 898	regs->gpr[1] = r1;
 899	regs->nip = ip;
 900	regs->msr = msr;
 901	regs->link = lr;
 902}
 903
 904/*
 905 * For interrupts needed to be handled by host interrupt handlers,
 906 * corresponding host handler are called from here in similar way
 907 * (but not exact) as they are called from low level handler
 908 * (such as from arch/powerpc/kernel/head_fsl_booke.S).
 909 */
 910static void kvmppc_restart_interrupt(struct kvm_vcpu *vcpu,
 911				     unsigned int exit_nr)
 912{
 913	struct pt_regs regs;
 914
 915	switch (exit_nr) {
 916	case BOOKE_INTERRUPT_EXTERNAL:
 917		kvmppc_fill_pt_regs(&regs);
 918		do_IRQ(&regs);
 919		break;
 920	case BOOKE_INTERRUPT_DECREMENTER:
 921		kvmppc_fill_pt_regs(&regs);
 922		timer_interrupt(&regs);
 923		break;
 924#if defined(CONFIG_PPC_DOORBELL)
 925	case BOOKE_INTERRUPT_DOORBELL:
 926		kvmppc_fill_pt_regs(&regs);
 927		doorbell_exception(&regs);
 928		break;
 929#endif
 930	case BOOKE_INTERRUPT_MACHINE_CHECK:
 931		/* FIXME */
 932		break;
 933	case BOOKE_INTERRUPT_PERFORMANCE_MONITOR:
 934		kvmppc_fill_pt_regs(&regs);
 935		performance_monitor_exception(&regs);
 936		break;
 937	case BOOKE_INTERRUPT_WATCHDOG:
 938		kvmppc_fill_pt_regs(&regs);
 939#ifdef CONFIG_BOOKE_WDT
 940		WatchdogException(&regs);
 941#else
 942		unknown_exception(&regs);
 943#endif
 944		break;
 945	case BOOKE_INTERRUPT_CRITICAL:
 946		kvmppc_fill_pt_regs(&regs);
 947		unknown_exception(&regs);
 948		break;
 949	case BOOKE_INTERRUPT_DEBUG:
 950		/* Save DBSR before preemption is enabled */
 951		vcpu->arch.dbsr = mfspr(SPRN_DBSR);
 952		kvmppc_clear_dbsr();
 953		break;
 954	}
 955}
 956
 957static int kvmppc_resume_inst_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
 958				  enum emulation_result emulated, u32 last_inst)
 959{
 960	switch (emulated) {
 961	case EMULATE_AGAIN:
 962		return RESUME_GUEST;
 963
 964	case EMULATE_FAIL:
 965		pr_debug("%s: load instruction from guest address %lx failed\n",
 966		       __func__, vcpu->arch.regs.nip);
 967		/* For debugging, encode the failing instruction and
 968		 * report it to userspace. */
 969		run->hw.hardware_exit_reason = ~0ULL << 32;
 970		run->hw.hardware_exit_reason |= last_inst;
 971		kvmppc_core_queue_program(vcpu, ESR_PIL);
 972		return RESUME_HOST;
 973
 974	default:
 975		BUG();
 976	}
 977}
 978
 979/**
 980 * kvmppc_handle_exit
 981 *
 982 * Return value is in the form (errcode<<2 | RESUME_FLAG_HOST | RESUME_FLAG_NV)
 983 */
 984int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu,
 985                       unsigned int exit_nr)
 986{
 987	int r = RESUME_HOST;
 988	int s;
 989	int idx;
 990	u32 last_inst = KVM_INST_FETCH_FAILED;
 991	enum emulation_result emulated = EMULATE_DONE;
 992
 993	/* update before a new last_exit_type is rewritten */
 994	kvmppc_update_timing_stats(vcpu);
 995
 996	/* restart interrupts if they were meant for the host */
 997	kvmppc_restart_interrupt(vcpu, exit_nr);
 998
 999	/*
1000	 * get last instruction before being preempted
1001	 * TODO: for e6500 check also BOOKE_INTERRUPT_LRAT_ERROR & ESR_DATA
1002	 */
1003	switch (exit_nr) {
1004	case BOOKE_INTERRUPT_DATA_STORAGE:
1005	case BOOKE_INTERRUPT_DTLB_MISS:
1006	case BOOKE_INTERRUPT_HV_PRIV:
1007		emulated = kvmppc_get_last_inst(vcpu, INST_GENERIC, &last_inst);
1008		break;
1009	case BOOKE_INTERRUPT_PROGRAM:
1010		/* SW breakpoints arrive as illegal instructions on HV */
1011		if (vcpu->guest_debug & KVM_GUESTDBG_USE_SW_BP)
1012			emulated = kvmppc_get_last_inst(vcpu, INST_GENERIC, &last_inst);
1013		break;
1014	default:
1015		break;
1016	}
1017
1018	trace_kvm_exit(exit_nr, vcpu);
1019	guest_exit_irqoff();
1020
1021	local_irq_enable();
1022
1023	run->exit_reason = KVM_EXIT_UNKNOWN;
1024	run->ready_for_interrupt_injection = 1;
1025
1026	if (emulated != EMULATE_DONE) {
1027		r = kvmppc_resume_inst_load(run, vcpu, emulated, last_inst);
1028		goto out;
1029	}
1030
1031	switch (exit_nr) {
1032	case BOOKE_INTERRUPT_MACHINE_CHECK:
1033		printk("MACHINE CHECK: %lx\n", mfspr(SPRN_MCSR));
1034		kvmppc_dump_vcpu(vcpu);
1035		/* For debugging, send invalid exit reason to user space */
1036		run->hw.hardware_exit_reason = ~1ULL << 32;
1037		run->hw.hardware_exit_reason |= mfspr(SPRN_MCSR);
1038		r = RESUME_HOST;
1039		break;
1040
1041	case BOOKE_INTERRUPT_EXTERNAL:
1042		kvmppc_account_exit(vcpu, EXT_INTR_EXITS);
1043		r = RESUME_GUEST;
1044		break;
1045
1046	case BOOKE_INTERRUPT_DECREMENTER:
1047		kvmppc_account_exit(vcpu, DEC_EXITS);
1048		r = RESUME_GUEST;
1049		break;
1050
1051	case BOOKE_INTERRUPT_WATCHDOG:
1052		r = RESUME_GUEST;
1053		break;
1054
1055	case BOOKE_INTERRUPT_DOORBELL:
1056		kvmppc_account_exit(vcpu, DBELL_EXITS);
1057		r = RESUME_GUEST;
1058		break;
1059
1060	case BOOKE_INTERRUPT_GUEST_DBELL_CRIT:
1061		kvmppc_account_exit(vcpu, GDBELL_EXITS);
1062
1063		/*
1064		 * We are here because there is a pending guest interrupt
1065		 * which could not be delivered as MSR_CE or MSR_ME was not
1066		 * set.  Once we break from here we will retry delivery.
1067		 */
1068		r = RESUME_GUEST;
1069		break;
1070
1071	case BOOKE_INTERRUPT_GUEST_DBELL:
1072		kvmppc_account_exit(vcpu, GDBELL_EXITS);
1073
1074		/*
1075		 * We are here because there is a pending guest interrupt
1076		 * which could not be delivered as MSR_EE was not set.  Once
1077		 * we break from here we will retry delivery.
1078		 */
1079		r = RESUME_GUEST;
1080		break;
1081
1082	case BOOKE_INTERRUPT_PERFORMANCE_MONITOR:
1083		r = RESUME_GUEST;
1084		break;
1085
1086	case BOOKE_INTERRUPT_HV_PRIV:
1087		r = emulation_exit(run, vcpu);
1088		break;
1089
1090	case BOOKE_INTERRUPT_PROGRAM:
1091		if ((vcpu->guest_debug & KVM_GUESTDBG_USE_SW_BP) &&
1092			(last_inst == KVMPPC_INST_SW_BREAKPOINT)) {
1093			/*
1094			 * We are here because of an SW breakpoint instr,
1095			 * so lets return to host to handle.
1096			 */
1097			r = kvmppc_handle_debug(run, vcpu);
1098			run->exit_reason = KVM_EXIT_DEBUG;
1099			kvmppc_account_exit(vcpu, DEBUG_EXITS);
1100			break;
1101		}
1102
1103		if (vcpu->arch.shared->msr & (MSR_PR | MSR_GS)) {
1104			/*
1105			 * Program traps generated by user-level software must
1106			 * be handled by the guest kernel.
1107			 *
1108			 * In GS mode, hypervisor privileged instructions trap
1109			 * on BOOKE_INTERRUPT_HV_PRIV, not here, so these are
1110			 * actual program interrupts, handled by the guest.
1111			 */
1112			kvmppc_core_queue_program(vcpu, vcpu->arch.fault_esr);
1113			r = RESUME_GUEST;
1114			kvmppc_account_exit(vcpu, USR_PR_INST);
1115			break;
1116		}
1117
1118		r = emulation_exit(run, vcpu);
1119		break;
1120
1121	case BOOKE_INTERRUPT_FP_UNAVAIL:
1122		kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_FP_UNAVAIL);
1123		kvmppc_account_exit(vcpu, FP_UNAVAIL);
1124		r = RESUME_GUEST;
1125		break;
1126
1127#ifdef CONFIG_SPE
1128	case BOOKE_INTERRUPT_SPE_UNAVAIL: {
1129		if (vcpu->arch.shared->msr & MSR_SPE)
1130			kvmppc_vcpu_enable_spe(vcpu);
1131		else
1132			kvmppc_booke_queue_irqprio(vcpu,
1133						   BOOKE_IRQPRIO_SPE_UNAVAIL);
1134		r = RESUME_GUEST;
1135		break;
1136	}
1137
1138	case BOOKE_INTERRUPT_SPE_FP_DATA:
1139		kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SPE_FP_DATA);
1140		r = RESUME_GUEST;
1141		break;
1142
1143	case BOOKE_INTERRUPT_SPE_FP_ROUND:
1144		kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SPE_FP_ROUND);
1145		r = RESUME_GUEST;
1146		break;
1147#elif defined(CONFIG_SPE_POSSIBLE)
1148	case BOOKE_INTERRUPT_SPE_UNAVAIL:
1149		/*
1150		 * Guest wants SPE, but host kernel doesn't support it.  Send
1151		 * an "unimplemented operation" program check to the guest.
1152		 */
1153		kvmppc_core_queue_program(vcpu, ESR_PUO | ESR_SPV);
1154		r = RESUME_GUEST;
1155		break;
1156
1157	/*
1158	 * These really should never happen without CONFIG_SPE,
1159	 * as we should never enable the real MSR[SPE] in the guest.
1160	 */
1161	case BOOKE_INTERRUPT_SPE_FP_DATA:
1162	case BOOKE_INTERRUPT_SPE_FP_ROUND:
1163		printk(KERN_CRIT "%s: unexpected SPE interrupt %u at %08lx\n",
1164		       __func__, exit_nr, vcpu->arch.regs.nip);
1165		run->hw.hardware_exit_reason = exit_nr;
1166		r = RESUME_HOST;
1167		break;
1168#endif /* CONFIG_SPE_POSSIBLE */
1169
1170/*
1171 * On cores with Vector category, KVM is loaded only if CONFIG_ALTIVEC,
1172 * see kvmppc_core_check_processor_compat().
1173 */
1174#ifdef CONFIG_ALTIVEC
1175	case BOOKE_INTERRUPT_ALTIVEC_UNAVAIL:
1176		kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ALTIVEC_UNAVAIL);
1177		r = RESUME_GUEST;
1178		break;
1179
1180	case BOOKE_INTERRUPT_ALTIVEC_ASSIST:
1181		kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ALTIVEC_ASSIST);
1182		r = RESUME_GUEST;
1183		break;
1184#endif
1185
1186	case BOOKE_INTERRUPT_DATA_STORAGE:
1187		kvmppc_core_queue_data_storage(vcpu, vcpu->arch.fault_dear,
1188		                               vcpu->arch.fault_esr);
1189		kvmppc_account_exit(vcpu, DSI_EXITS);
1190		r = RESUME_GUEST;
1191		break;
1192
1193	case BOOKE_INTERRUPT_INST_STORAGE:
1194		kvmppc_core_queue_inst_storage(vcpu, vcpu->arch.fault_esr);
1195		kvmppc_account_exit(vcpu, ISI_EXITS);
1196		r = RESUME_GUEST;
1197		break;
1198
1199	case BOOKE_INTERRUPT_ALIGNMENT:
1200		kvmppc_core_queue_alignment(vcpu, vcpu->arch.fault_dear,
1201		                            vcpu->arch.fault_esr);
1202		r = RESUME_GUEST;
1203		break;
1204
1205#ifdef CONFIG_KVM_BOOKE_HV
1206	case BOOKE_INTERRUPT_HV_SYSCALL:
1207		if (!(vcpu->arch.shared->msr & MSR_PR)) {
1208			kvmppc_set_gpr(vcpu, 3, kvmppc_kvm_pv(vcpu));
1209		} else {
1210			/*
1211			 * hcall from guest userspace -- send privileged
1212			 * instruction program check.
1213			 */
1214			kvmppc_core_queue_program(vcpu, ESR_PPR);
1215		}
1216
1217		r = RESUME_GUEST;
1218		break;
1219#else
1220	case BOOKE_INTERRUPT_SYSCALL:
1221		if (!(vcpu->arch.shared->msr & MSR_PR) &&
1222		    (((u32)kvmppc_get_gpr(vcpu, 0)) == KVM_SC_MAGIC_R0)) {
1223			/* KVM PV hypercalls */
1224			kvmppc_set_gpr(vcpu, 3, kvmppc_kvm_pv(vcpu));
1225			r = RESUME_GUEST;
1226		} else {
1227			/* Guest syscalls */
1228			kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SYSCALL);
1229		}
1230		kvmppc_account_exit(vcpu, SYSCALL_EXITS);
1231		r = RESUME_GUEST;
1232		break;
1233#endif
1234
1235	case BOOKE_INTERRUPT_DTLB_MISS: {
1236		unsigned long eaddr = vcpu->arch.fault_dear;
1237		int gtlb_index;
1238		gpa_t gpaddr;
1239		gfn_t gfn;
1240
1241#ifdef CONFIG_KVM_E500V2
1242		if (!(vcpu->arch.shared->msr & MSR_PR) &&
1243		    (eaddr & PAGE_MASK) == vcpu->arch.magic_page_ea) {
1244			kvmppc_map_magic(vcpu);
1245			kvmppc_account_exit(vcpu, DTLB_VIRT_MISS_EXITS);
1246			r = RESUME_GUEST;
1247
1248			break;
1249		}
1250#endif
1251
1252		/* Check the guest TLB. */
1253		gtlb_index = kvmppc_mmu_dtlb_index(vcpu, eaddr);
1254		if (gtlb_index < 0) {
1255			/* The guest didn't have a mapping for it. */
1256			kvmppc_core_queue_dtlb_miss(vcpu,
1257			                            vcpu->arch.fault_dear,
1258			                            vcpu->arch.fault_esr);
1259			kvmppc_mmu_dtlb_miss(vcpu);
1260			kvmppc_account_exit(vcpu, DTLB_REAL_MISS_EXITS);
1261			r = RESUME_GUEST;
1262			break;
1263		}
1264
1265		idx = srcu_read_lock(&vcpu->kvm->srcu);
1266
1267		gpaddr = kvmppc_mmu_xlate(vcpu, gtlb_index, eaddr);
1268		gfn = gpaddr >> PAGE_SHIFT;
1269
1270		if (kvm_is_visible_gfn(vcpu->kvm, gfn)) {
1271			/* The guest TLB had a mapping, but the shadow TLB
1272			 * didn't, and it is RAM. This could be because:
1273			 * a) the entry is mapping the host kernel, or
1274			 * b) the guest used a large mapping which we're faking
1275			 * Either way, we need to satisfy the fault without
1276			 * invoking the guest. */
1277			kvmppc_mmu_map(vcpu, eaddr, gpaddr, gtlb_index);
1278			kvmppc_account_exit(vcpu, DTLB_VIRT_MISS_EXITS);
1279			r = RESUME_GUEST;
1280		} else {
1281			/* Guest has mapped and accessed a page which is not
1282			 * actually RAM. */
1283			vcpu->arch.paddr_accessed = gpaddr;
1284			vcpu->arch.vaddr_accessed = eaddr;
1285			r = kvmppc_emulate_mmio(run, vcpu);
1286			kvmppc_account_exit(vcpu, MMIO_EXITS);
1287		}
1288
1289		srcu_read_unlock(&vcpu->kvm->srcu, idx);
1290		break;
1291	}
1292
1293	case BOOKE_INTERRUPT_ITLB_MISS: {
1294		unsigned long eaddr = vcpu->arch.regs.nip;
1295		gpa_t gpaddr;
1296		gfn_t gfn;
1297		int gtlb_index;
1298
1299		r = RESUME_GUEST;
1300
1301		/* Check the guest TLB. */
1302		gtlb_index = kvmppc_mmu_itlb_index(vcpu, eaddr);
1303		if (gtlb_index < 0) {
1304			/* The guest didn't have a mapping for it. */
1305			kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ITLB_MISS);
1306			kvmppc_mmu_itlb_miss(vcpu);
1307			kvmppc_account_exit(vcpu, ITLB_REAL_MISS_EXITS);
1308			break;
1309		}
1310
1311		kvmppc_account_exit(vcpu, ITLB_VIRT_MISS_EXITS);
1312
1313		idx = srcu_read_lock(&vcpu->kvm->srcu);
1314
1315		gpaddr = kvmppc_mmu_xlate(vcpu, gtlb_index, eaddr);
1316		gfn = gpaddr >> PAGE_SHIFT;
1317
1318		if (kvm_is_visible_gfn(vcpu->kvm, gfn)) {
1319			/* The guest TLB had a mapping, but the shadow TLB
1320			 * didn't. This could be because:
1321			 * a) the entry is mapping the host kernel, or
1322			 * b) the guest used a large mapping which we're faking
1323			 * Either way, we need to satisfy the fault without
1324			 * invoking the guest. */
1325			kvmppc_mmu_map(vcpu, eaddr, gpaddr, gtlb_index);
1326		} else {
1327			/* Guest mapped and leaped at non-RAM! */
1328			kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_MACHINE_CHECK);
1329		}
1330
1331		srcu_read_unlock(&vcpu->kvm->srcu, idx);
1332		break;
1333	}
1334
1335	case BOOKE_INTERRUPT_DEBUG: {
1336		r = kvmppc_handle_debug(run, vcpu);
1337		if (r == RESUME_HOST)
1338			run->exit_reason = KVM_EXIT_DEBUG;
1339		kvmppc_account_exit(vcpu, DEBUG_EXITS);
1340		break;
1341	}
1342
1343	default:
1344		printk(KERN_EMERG "exit_nr %d\n", exit_nr);
1345		BUG();
1346	}
1347
1348out:
1349	/*
1350	 * To avoid clobbering exit_reason, only check for signals if we
1351	 * aren't already exiting to userspace for some other reason.
1352	 */
1353	if (!(r & RESUME_HOST)) {
1354		s = kvmppc_prepare_to_enter(vcpu);
1355		if (s <= 0)
1356			r = (s << 2) | RESUME_HOST | (r & RESUME_FLAG_NV);
1357		else {
1358			/* interrupts now hard-disabled */
1359			kvmppc_fix_ee_before_entry();
1360			kvmppc_load_guest_fp(vcpu);
1361			kvmppc_load_guest_altivec(vcpu);
1362		}
1363	}
1364
1365	return r;
1366}
1367
1368static void kvmppc_set_tsr(struct kvm_vcpu *vcpu, u32 new_tsr)
1369{
1370	u32 old_tsr = vcpu->arch.tsr;
1371
1372	vcpu->arch.tsr = new_tsr;
1373
1374	if ((old_tsr ^ vcpu->arch.tsr) & (TSR_ENW | TSR_WIS))
1375		arm_next_watchdog(vcpu);
1376
1377	update_timer_ints(vcpu);
1378}
1379
1380int kvmppc_subarch_vcpu_init(struct kvm_vcpu *vcpu)
1381{
1382	/* setup watchdog timer once */
1383	spin_lock_init(&vcpu->arch.wdt_lock);
1384	timer_setup(&vcpu->arch.wdt_timer, kvmppc_watchdog_func, 0);
1385
1386	/*
1387	 * Clear DBSR.MRR to avoid guest debug interrupt as
1388	 * this is of host interest
1389	 */
1390	mtspr(SPRN_DBSR, DBSR_MRR);
1391	return 0;
1392}
1393
1394void kvmppc_subarch_vcpu_uninit(struct kvm_vcpu *vcpu)
1395{
1396	del_timer_sync(&vcpu->arch.wdt_timer);
1397}
1398
1399int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
1400{
1401	int i;
1402
1403	vcpu_load(vcpu);
1404
1405	regs->pc = vcpu->arch.regs.nip;
1406	regs->cr = kvmppc_get_cr(vcpu);
1407	regs->ctr = vcpu->arch.regs.ctr;
1408	regs->lr = vcpu->arch.regs.link;
1409	regs->xer = kvmppc_get_xer(vcpu);
1410	regs->msr = vcpu->arch.shared->msr;
1411	regs->srr0 = kvmppc_get_srr0(vcpu);
1412	regs->srr1 = kvmppc_get_srr1(vcpu);
1413	regs->pid = vcpu->arch.pid;
1414	regs->sprg0 = kvmppc_get_sprg0(vcpu);
1415	regs->sprg1 = kvmppc_get_sprg1(vcpu);
1416	regs->sprg2 = kvmppc_get_sprg2(vcpu);
1417	regs->sprg3 = kvmppc_get_sprg3(vcpu);
1418	regs->sprg4 = kvmppc_get_sprg4(vcpu);
1419	regs->sprg5 = kvmppc_get_sprg5(vcpu);
1420	regs->sprg6 = kvmppc_get_sprg6(vcpu);
1421	regs->sprg7 = kvmppc_get_sprg7(vcpu);
1422
1423	for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
1424		regs->gpr[i] = kvmppc_get_gpr(vcpu, i);
1425
1426	vcpu_put(vcpu);
1427	return 0;
1428}
1429
1430int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
1431{
1432	int i;
1433
1434	vcpu_load(vcpu);
1435
1436	vcpu->arch.regs.nip = regs->pc;
1437	kvmppc_set_cr(vcpu, regs->cr);
1438	vcpu->arch.regs.ctr = regs->ctr;
1439	vcpu->arch.regs.link = regs->lr;
1440	kvmppc_set_xer(vcpu, regs->xer);
1441	kvmppc_set_msr(vcpu, regs->msr);
1442	kvmppc_set_srr0(vcpu, regs->srr0);
1443	kvmppc_set_srr1(vcpu, regs->srr1);
1444	kvmppc_set_pid(vcpu, regs->pid);
1445	kvmppc_set_sprg0(vcpu, regs->sprg0);
1446	kvmppc_set_sprg1(vcpu, regs->sprg1);
1447	kvmppc_set_sprg2(vcpu, regs->sprg2);
1448	kvmppc_set_sprg3(vcpu, regs->sprg3);
1449	kvmppc_set_sprg4(vcpu, regs->sprg4);
1450	kvmppc_set_sprg5(vcpu, regs->sprg5);
1451	kvmppc_set_sprg6(vcpu, regs->sprg6);
1452	kvmppc_set_sprg7(vcpu, regs->sprg7);
1453
1454	for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
1455		kvmppc_set_gpr(vcpu, i, regs->gpr[i]);
1456
1457	vcpu_put(vcpu);
1458	return 0;
1459}
1460
1461static void get_sregs_base(struct kvm_vcpu *vcpu,
1462                           struct kvm_sregs *sregs)
1463{
1464	u64 tb = get_tb();
1465
1466	sregs->u.e.features |= KVM_SREGS_E_BASE;
1467
1468	sregs->u.e.csrr0 = vcpu->arch.csrr0;
1469	sregs->u.e.csrr1 = vcpu->arch.csrr1;
1470	sregs->u.e.mcsr = vcpu->arch.mcsr;
1471	sregs->u.e.esr = kvmppc_get_esr(vcpu);
1472	sregs->u.e.dear = kvmppc_get_dar(vcpu);
1473	sregs->u.e.tsr = vcpu->arch.tsr;
1474	sregs->u.e.tcr = vcpu->arch.tcr;
1475	sregs->u.e.dec = kvmppc_get_dec(vcpu, tb);
1476	sregs->u.e.tb = tb;
1477	sregs->u.e.vrsave = vcpu->arch.vrsave;
1478}
1479
1480static int set_sregs_base(struct kvm_vcpu *vcpu,
1481                          struct kvm_sregs *sregs)
1482{
1483	if (!(sregs->u.e.features & KVM_SREGS_E_BASE))
1484		return 0;
1485
1486	vcpu->arch.csrr0 = sregs->u.e.csrr0;
1487	vcpu->arch.csrr1 = sregs->u.e.csrr1;
1488	vcpu->arch.mcsr = sregs->u.e.mcsr;
1489	kvmppc_set_esr(vcpu, sregs->u.e.esr);
1490	kvmppc_set_dar(vcpu, sregs->u.e.dear);
1491	vcpu->arch.vrsave = sregs->u.e.vrsave;
1492	kvmppc_set_tcr(vcpu, sregs->u.e.tcr);
1493
1494	if (sregs->u.e.update_special & KVM_SREGS_E_UPDATE_DEC) {
1495		vcpu->arch.dec = sregs->u.e.dec;
1496		kvmppc_emulate_dec(vcpu);
1497	}
1498
1499	if (sregs->u.e.update_special & KVM_SREGS_E_UPDATE_TSR)
1500		kvmppc_set_tsr(vcpu, sregs->u.e.tsr);
1501
1502	return 0;
1503}
1504
1505static void get_sregs_arch206(struct kvm_vcpu *vcpu,
1506                              struct kvm_sregs *sregs)
1507{
1508	sregs->u.e.features |= KVM_SREGS_E_ARCH206;
1509
1510	sregs->u.e.pir = vcpu->vcpu_id;
1511	sregs->u.e.mcsrr0 = vcpu->arch.mcsrr0;
1512	sregs->u.e.mcsrr1 = vcpu->arch.mcsrr1;
1513	sregs->u.e.decar = vcpu->arch.decar;
1514	sregs->u.e.ivpr = vcpu->arch.ivpr;
1515}
1516
1517static int set_sregs_arch206(struct kvm_vcpu *vcpu,
1518                             struct kvm_sregs *sregs)
1519{
1520	if (!(sregs->u.e.features & KVM_SREGS_E_ARCH206))
1521		return 0;
1522
1523	if (sregs->u.e.pir != vcpu->vcpu_id)
1524		return -EINVAL;
1525
1526	vcpu->arch.mcsrr0 = sregs->u.e.mcsrr0;
1527	vcpu->arch.mcsrr1 = sregs->u.e.mcsrr1;
1528	vcpu->arch.decar = sregs->u.e.decar;
1529	vcpu->arch.ivpr = sregs->u.e.ivpr;
1530
1531	return 0;
1532}
1533
1534int kvmppc_get_sregs_ivor(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
1535{
1536	sregs->u.e.features |= KVM_SREGS_E_IVOR;
1537
1538	sregs->u.e.ivor_low[0] = vcpu->arch.ivor[BOOKE_IRQPRIO_CRITICAL];
1539	sregs->u.e.ivor_low[1] = vcpu->arch.ivor[BOOKE_IRQPRIO_MACHINE_CHECK];
1540	sregs->u.e.ivor_low[2] = vcpu->arch.ivor[BOOKE_IRQPRIO_DATA_STORAGE];
1541	sregs->u.e.ivor_low[3] = vcpu->arch.ivor[BOOKE_IRQPRIO_INST_STORAGE];
1542	sregs->u.e.ivor_low[4] = vcpu->arch.ivor[BOOKE_IRQPRIO_EXTERNAL];
1543	sregs->u.e.ivor_low[5] = vcpu->arch.ivor[BOOKE_IRQPRIO_ALIGNMENT];
1544	sregs->u.e.ivor_low[6] = vcpu->arch.ivor[BOOKE_IRQPRIO_PROGRAM];
1545	sregs->u.e.ivor_low[7] = vcpu->arch.ivor[BOOKE_IRQPRIO_FP_UNAVAIL];
1546	sregs->u.e.ivor_low[8] = vcpu->arch.ivor[BOOKE_IRQPRIO_SYSCALL];
1547	sregs->u.e.ivor_low[9] = vcpu->arch.ivor[BOOKE_IRQPRIO_AP_UNAVAIL];
1548	sregs->u.e.ivor_low[10] = vcpu->arch.ivor[BOOKE_IRQPRIO_DECREMENTER];
1549	sregs->u.e.ivor_low[11] = vcpu->arch.ivor[BOOKE_IRQPRIO_FIT];
1550	sregs->u.e.ivor_low[12] = vcpu->arch.ivor[BOOKE_IRQPRIO_WATCHDOG];
1551	sregs->u.e.ivor_low[13] = vcpu->arch.ivor[BOOKE_IRQPRIO_DTLB_MISS];
1552	sregs->u.e.ivor_low[14] = vcpu->arch.ivor[BOOKE_IRQPRIO_ITLB_MISS];
1553	sregs->u.e.ivor_low[15] = vcpu->arch.ivor[BOOKE_IRQPRIO_DEBUG];
1554	return 0;
1555}
1556
1557int kvmppc_set_sregs_ivor(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
1558{
1559	if (!(sregs->u.e.features & KVM_SREGS_E_IVOR))
1560		return 0;
1561
1562	vcpu->arch.ivor[BOOKE_IRQPRIO_CRITICAL] = sregs->u.e.ivor_low[0];
1563	vcpu->arch.ivor[BOOKE_IRQPRIO_MACHINE_CHECK] = sregs->u.e.ivor_low[1];
1564	vcpu->arch.ivor[BOOKE_IRQPRIO_DATA_STORAGE] = sregs->u.e.ivor_low[2];
1565	vcpu->arch.ivor[BOOKE_IRQPRIO_INST_STORAGE] = sregs->u.e.ivor_low[3];
1566	vcpu->arch.ivor[BOOKE_IRQPRIO_EXTERNAL] = sregs->u.e.ivor_low[4];
1567	vcpu->arch.ivor[BOOKE_IRQPRIO_ALIGNMENT] = sregs->u.e.ivor_low[5];
1568	vcpu->arch.ivor[BOOKE_IRQPRIO_PROGRAM] = sregs->u.e.ivor_low[6];
1569	vcpu->arch.ivor[BOOKE_IRQPRIO_FP_UNAVAIL] = sregs->u.e.ivor_low[7];
1570	vcpu->arch.ivor[BOOKE_IRQPRIO_SYSCALL] = sregs->u.e.ivor_low[8];
1571	vcpu->arch.ivor[BOOKE_IRQPRIO_AP_UNAVAIL] = sregs->u.e.ivor_low[9];
1572	vcpu->arch.ivor[BOOKE_IRQPRIO_DECREMENTER] = sregs->u.e.ivor_low[10];
1573	vcpu->arch.ivor[BOOKE_IRQPRIO_FIT] = sregs->u.e.ivor_low[11];
1574	vcpu->arch.ivor[BOOKE_IRQPRIO_WATCHDOG] = sregs->u.e.ivor_low[12];
1575	vcpu->arch.ivor[BOOKE_IRQPRIO_DTLB_MISS] = sregs->u.e.ivor_low[13];
1576	vcpu->arch.ivor[BOOKE_IRQPRIO_ITLB_MISS] = sregs->u.e.ivor_low[14];
1577	vcpu->arch.ivor[BOOKE_IRQPRIO_DEBUG] = sregs->u.e.ivor_low[15];
1578
1579	return 0;
1580}
1581
1582int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
1583                                  struct kvm_sregs *sregs)
1584{
1585	int ret;
1586
1587	vcpu_load(vcpu);
1588
1589	sregs->pvr = vcpu->arch.pvr;
1590
1591	get_sregs_base(vcpu, sregs);
1592	get_sregs_arch206(vcpu, sregs);
1593	ret = vcpu->kvm->arch.kvm_ops->get_sregs(vcpu, sregs);
1594
1595	vcpu_put(vcpu);
1596	return ret;
1597}
1598
1599int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
1600                                  struct kvm_sregs *sregs)
1601{
1602	int ret = -EINVAL;
1603
1604	vcpu_load(vcpu);
1605	if (vcpu->arch.pvr != sregs->pvr)
1606		goto out;
1607
1608	ret = set_sregs_base(vcpu, sregs);
1609	if (ret < 0)
1610		goto out;
1611
1612	ret = set_sregs_arch206(vcpu, sregs);
1613	if (ret < 0)
1614		goto out;
1615
1616	ret = vcpu->kvm->arch.kvm_ops->set_sregs(vcpu, sregs);
1617
1618out:
1619	vcpu_put(vcpu);
1620	return ret;
1621}
1622
1623int kvmppc_get_one_reg(struct kvm_vcpu *vcpu, u64 id,
1624			union kvmppc_one_reg *val)
1625{
1626	int r = 0;
1627
1628	switch (id) {
1629	case KVM_REG_PPC_IAC1:
1630		*val = get_reg_val(id, vcpu->arch.dbg_reg.iac1);
1631		break;
1632	case KVM_REG_PPC_IAC2:
1633		*val = get_reg_val(id, vcpu->arch.dbg_reg.iac2);
1634		break;
1635#if CONFIG_PPC_ADV_DEBUG_IACS > 2
1636	case KVM_REG_PPC_IAC3:
1637		*val = get_reg_val(id, vcpu->arch.dbg_reg.iac3);
1638		break;
1639	case KVM_REG_PPC_IAC4:
1640		*val = get_reg_val(id, vcpu->arch.dbg_reg.iac4);
1641		break;
1642#endif
1643	case KVM_REG_PPC_DAC1:
1644		*val = get_reg_val(id, vcpu->arch.dbg_reg.dac1);
1645		break;
1646	case KVM_REG_PPC_DAC2:
1647		*val = get_reg_val(id, vcpu->arch.dbg_reg.dac2);
1648		break;
1649	case KVM_REG_PPC_EPR: {
1650		u32 epr = kvmppc_get_epr(vcpu);
1651		*val = get_reg_val(id, epr);
1652		break;
1653	}
1654#if defined(CONFIG_64BIT)
1655	case KVM_REG_PPC_EPCR:
1656		*val = get_reg_val(id, vcpu->arch.epcr);
1657		break;
1658#endif
1659	case KVM_REG_PPC_TCR:
1660		*val = get_reg_val(id, vcpu->arch.tcr);
1661		break;
1662	case KVM_REG_PPC_TSR:
1663		*val = get_reg_val(id, vcpu->arch.tsr);
1664		break;
1665	case KVM_REG_PPC_DEBUG_INST:
1666		*val = get_reg_val(id, KVMPPC_INST_SW_BREAKPOINT);
1667		break;
1668	case KVM_REG_PPC_VRSAVE:
1669		*val = get_reg_val(id, vcpu->arch.vrsave);
1670		break;
1671	default:
1672		r = vcpu->kvm->arch.kvm_ops->get_one_reg(vcpu, id, val);
1673		break;
1674	}
1675
1676	return r;
1677}
1678
1679int kvmppc_set_one_reg(struct kvm_vcpu *vcpu, u64 id,
1680			union kvmppc_one_reg *val)
1681{
1682	int r = 0;
1683
1684	switch (id) {
1685	case KVM_REG_PPC_IAC1:
1686		vcpu->arch.dbg_reg.iac1 = set_reg_val(id, *val);
1687		break;
1688	case KVM_REG_PPC_IAC2:
1689		vcpu->arch.dbg_reg.iac2 = set_reg_val(id, *val);
1690		break;
1691#if CONFIG_PPC_ADV_DEBUG_IACS > 2
1692	case KVM_REG_PPC_IAC3:
1693		vcpu->arch.dbg_reg.iac3 = set_reg_val(id, *val);
1694		break;
1695	case KVM_REG_PPC_IAC4:
1696		vcpu->arch.dbg_reg.iac4 = set_reg_val(id, *val);
1697		break;
1698#endif
1699	case KVM_REG_PPC_DAC1:
1700		vcpu->arch.dbg_reg.dac1 = set_reg_val(id, *val);
1701		break;
1702	case KVM_REG_PPC_DAC2:
1703		vcpu->arch.dbg_reg.dac2 = set_reg_val(id, *val);
1704		break;
1705	case KVM_REG_PPC_EPR: {
1706		u32 new_epr = set_reg_val(id, *val);
1707		kvmppc_set_epr(vcpu, new_epr);
1708		break;
1709	}
1710#if defined(CONFIG_64BIT)
1711	case KVM_REG_PPC_EPCR: {
1712		u32 new_epcr = set_reg_val(id, *val);
1713		kvmppc_set_epcr(vcpu, new_epcr);
1714		break;
1715	}
1716#endif
1717	case KVM_REG_PPC_OR_TSR: {
1718		u32 tsr_bits = set_reg_val(id, *val);
1719		kvmppc_set_tsr_bits(vcpu, tsr_bits);
1720		break;
1721	}
1722	case KVM_REG_PPC_CLEAR_TSR: {
1723		u32 tsr_bits = set_reg_val(id, *val);
1724		kvmppc_clr_tsr_bits(vcpu, tsr_bits);
1725		break;
1726	}
1727	case KVM_REG_PPC_TSR: {
1728		u32 tsr = set_reg_val(id, *val);
1729		kvmppc_set_tsr(vcpu, tsr);
1730		break;
1731	}
1732	case KVM_REG_PPC_TCR: {
1733		u32 tcr = set_reg_val(id, *val);
1734		kvmppc_set_tcr(vcpu, tcr);
1735		break;
1736	}
1737	case KVM_REG_PPC_VRSAVE:
1738		vcpu->arch.vrsave = set_reg_val(id, *val);
1739		break;
1740	default:
1741		r = vcpu->kvm->arch.kvm_ops->set_one_reg(vcpu, id, val);
1742		break;
1743	}
1744
1745	return r;
1746}
1747
1748int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
1749{
1750	return -ENOTSUPP;
1751}
1752
1753int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
1754{
1755	return -ENOTSUPP;
1756}
1757
1758int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
1759                                  struct kvm_translation *tr)
1760{
1761	int r;
1762
1763	vcpu_load(vcpu);
1764	r = kvmppc_core_vcpu_translate(vcpu, tr);
1765	vcpu_put(vcpu);
1766	return r;
1767}
1768
1769void kvm_arch_sync_dirty_log(struct kvm *kvm, struct kvm_memory_slot *memslot)
1770{
1771
1772}
1773
1774int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log)
1775{
1776	return -ENOTSUPP;
1777}
1778
1779void kvmppc_core_free_memslot(struct kvm *kvm, struct kvm_memory_slot *slot)
1780{
1781}
1782
1783int kvmppc_core_prepare_memory_region(struct kvm *kvm,
1784				      struct kvm_memory_slot *memslot,
1785				      const struct kvm_userspace_memory_region *mem,
1786				      enum kvm_mr_change change)
1787{
1788	return 0;
1789}
1790
1791void kvmppc_core_commit_memory_region(struct kvm *kvm,
1792				const struct kvm_userspace_memory_region *mem,
1793				const struct kvm_memory_slot *old,
1794				const struct kvm_memory_slot *new,
1795				enum kvm_mr_change change)
1796{
1797}
1798
1799void kvmppc_core_flush_memslot(struct kvm *kvm, struct kvm_memory_slot *memslot)
1800{
1801}
1802
1803void kvmppc_set_epcr(struct kvm_vcpu *vcpu, u32 new_epcr)
1804{
1805#if defined(CONFIG_64BIT)
1806	vcpu->arch.epcr = new_epcr;
1807#ifdef CONFIG_KVM_BOOKE_HV
1808	vcpu->arch.shadow_epcr &= ~SPRN_EPCR_GICM;
1809	if (vcpu->arch.epcr  & SPRN_EPCR_ICM)
1810		vcpu->arch.shadow_epcr |= SPRN_EPCR_GICM;
1811#endif
1812#endif
1813}
1814
1815void kvmppc_set_tcr(struct kvm_vcpu *vcpu, u32 new_tcr)
1816{
1817	vcpu->arch.tcr = new_tcr;
1818	arm_next_watchdog(vcpu);
1819	update_timer_ints(vcpu);
1820}
1821
1822void kvmppc_set_tsr_bits(struct kvm_vcpu *vcpu, u32 tsr_bits)
1823{
1824	set_bits(tsr_bits, &vcpu->arch.tsr);
1825	smp_wmb();
1826	kvm_make_request(KVM_REQ_PENDING_TIMER, vcpu);
1827	kvm_vcpu_kick(vcpu);
1828}
1829
1830void kvmppc_clr_tsr_bits(struct kvm_vcpu *vcpu, u32 tsr_bits)
1831{
1832	clear_bits(tsr_bits, &vcpu->arch.tsr);
1833
1834	/*
1835	 * We may have stopped the watchdog due to
1836	 * being stuck on final expiration.
1837	 */
1838	if (tsr_bits & (TSR_ENW | TSR_WIS))
1839		arm_next_watchdog(vcpu);
1840
1841	update_timer_ints(vcpu);
1842}
1843
1844void kvmppc_decrementer_func(struct kvm_vcpu *vcpu)
1845{
1846	if (vcpu->arch.tcr & TCR_ARE) {
1847		vcpu->arch.dec = vcpu->arch.decar;
1848		kvmppc_emulate_dec(vcpu);
1849	}
1850
1851	kvmppc_set_tsr_bits(vcpu, TSR_DIS);
1852}
1853
1854static int kvmppc_booke_add_breakpoint(struct debug_reg *dbg_reg,
1855				       uint64_t addr, int index)
1856{
1857	switch (index) {
1858	case 0:
1859		dbg_reg->dbcr0 |= DBCR0_IAC1;
1860		dbg_reg->iac1 = addr;
1861		break;
1862	case 1:
1863		dbg_reg->dbcr0 |= DBCR0_IAC2;
1864		dbg_reg->iac2 = addr;
1865		break;
1866#if CONFIG_PPC_ADV_DEBUG_IACS > 2
1867	case 2:
1868		dbg_reg->dbcr0 |= DBCR0_IAC3;
1869		dbg_reg->iac3 = addr;
1870		break;
1871	case 3:
1872		dbg_reg->dbcr0 |= DBCR0_IAC4;
1873		dbg_reg->iac4 = addr;
1874		break;
1875#endif
1876	default:
1877		return -EINVAL;
1878	}
1879
1880	dbg_reg->dbcr0 |= DBCR0_IDM;
1881	return 0;
1882}
1883
1884static int kvmppc_booke_add_watchpoint(struct debug_reg *dbg_reg, uint64_t addr,
1885				       int type, int index)
1886{
1887	switch (index) {
1888	case 0:
1889		if (type & KVMPPC_DEBUG_WATCH_READ)
1890			dbg_reg->dbcr0 |= DBCR0_DAC1R;
1891		if (type & KVMPPC_DEBUG_WATCH_WRITE)
1892			dbg_reg->dbcr0 |= DBCR0_DAC1W;
1893		dbg_reg->dac1 = addr;
1894		break;
1895	case 1:
1896		if (type & KVMPPC_DEBUG_WATCH_READ)
1897			dbg_reg->dbcr0 |= DBCR0_DAC2R;
1898		if (type & KVMPPC_DEBUG_WATCH_WRITE)
1899			dbg_reg->dbcr0 |= DBCR0_DAC2W;
1900		dbg_reg->dac2 = addr;
1901		break;
1902	default:
1903		return -EINVAL;
1904	}
1905
1906	dbg_reg->dbcr0 |= DBCR0_IDM;
1907	return 0;
1908}
1909void kvm_guest_protect_msr(struct kvm_vcpu *vcpu, ulong prot_bitmap, bool set)
1910{
1911	/* XXX: Add similar MSR protection for BookE-PR */
1912#ifdef CONFIG_KVM_BOOKE_HV
1913	BUG_ON(prot_bitmap & ~(MSRP_UCLEP | MSRP_DEP | MSRP_PMMP));
1914	if (set) {
1915		if (prot_bitm…

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