book3s.c 38.3 KB
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/*
 * Copyright (C) 2009. SUSE Linux Products GmbH. All rights reserved.
 *
 * Authors:
 *    Alexander Graf <agraf@suse.de>
 *    Kevin Wolf <mail@kevin-wolf.de>
 *
 * Description:
 * This file is derived from arch/powerpc/kvm/44x.c,
 * by Hollis Blanchard <hollisb@us.ibm.com>.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License, version 2, as
 * published by the Free Software Foundation.
 */

#include <linux/kvm_host.h>
#include <linux/err.h>
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#include <linux/slab.h>
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#include <asm/reg.h>
#include <asm/cputable.h>
#include <asm/cacheflush.h>
#include <asm/tlbflush.h>
#include <asm/uaccess.h>
#include <asm/io.h>
#include <asm/kvm_ppc.h>
#include <asm/kvm_book3s.h>
#include <asm/mmu_context.h>
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#include <asm/page.h>
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#include <linux/gfp.h>
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#include <linux/sched.h>
#include <linux/vmalloc.h>
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#include <linux/highmem.h>
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#include "trace.h"

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#define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU

/* #define EXIT_DEBUG */
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/* #define DEBUG_EXT */

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static int kvmppc_handle_ext(struct kvm_vcpu *vcpu, unsigned int exit_nr,
			     ulong msr);
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/* Some compatibility defines */
#ifdef CONFIG_PPC_BOOK3S_32
#define MSR_USER32 MSR_USER
#define MSR_USER64 MSR_USER
#define HW_PAGE_SIZE PAGE_SIZE
#endif

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struct kvm_stats_debugfs_item debugfs_entries[] = {
	{ "exits",       VCPU_STAT(sum_exits) },
	{ "mmio",        VCPU_STAT(mmio_exits) },
	{ "sig",         VCPU_STAT(signal_exits) },
	{ "sysc",        VCPU_STAT(syscall_exits) },
	{ "inst_emu",    VCPU_STAT(emulated_inst_exits) },
	{ "dec",         VCPU_STAT(dec_exits) },
	{ "ext_intr",    VCPU_STAT(ext_intr_exits) },
	{ "queue_intr",  VCPU_STAT(queue_intr) },
	{ "halt_wakeup", VCPU_STAT(halt_wakeup) },
	{ "pf_storage",  VCPU_STAT(pf_storage) },
	{ "sp_storage",  VCPU_STAT(sp_storage) },
	{ "pf_instruc",  VCPU_STAT(pf_instruc) },
	{ "sp_instruc",  VCPU_STAT(sp_instruc) },
	{ "ld",          VCPU_STAT(ld) },
	{ "ld_slow",     VCPU_STAT(ld_slow) },
	{ "st",          VCPU_STAT(st) },
	{ "st_slow",     VCPU_STAT(st_slow) },
	{ NULL }
};

void kvmppc_core_load_host_debugstate(struct kvm_vcpu *vcpu)
{
}

void kvmppc_core_load_guest_debugstate(struct kvm_vcpu *vcpu)
{
}

void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
{
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#ifdef CONFIG_PPC_BOOK3S_64
	memcpy(to_svcpu(vcpu)->slb, to_book3s(vcpu)->slb_shadow, sizeof(to_svcpu(vcpu)->slb));
	memcpy(&get_paca()->shadow_vcpu, to_book3s(vcpu)->shadow_vcpu,
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	       sizeof(get_paca()->shadow_vcpu));
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	to_svcpu(vcpu)->slb_max = to_book3s(vcpu)->slb_shadow_max;
#endif

#ifdef CONFIG_PPC_BOOK3S_32
	current->thread.kvm_shadow_vcpu = to_book3s(vcpu)->shadow_vcpu;
#endif
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}

void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu)
{
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#ifdef CONFIG_PPC_BOOK3S_64
	memcpy(to_book3s(vcpu)->slb_shadow, to_svcpu(vcpu)->slb, sizeof(to_svcpu(vcpu)->slb));
	memcpy(to_book3s(vcpu)->shadow_vcpu, &get_paca()->shadow_vcpu,
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	       sizeof(get_paca()->shadow_vcpu));
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	to_book3s(vcpu)->slb_shadow_max = to_svcpu(vcpu)->slb_max;
#endif
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	kvmppc_giveup_ext(vcpu, MSR_FP);
	kvmppc_giveup_ext(vcpu, MSR_VEC);
	kvmppc_giveup_ext(vcpu, MSR_VSX);
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}

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static void kvmppc_recalc_shadow_msr(struct kvm_vcpu *vcpu)
{
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	ulong smsr = vcpu->arch.shared->msr;

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	/* Guest MSR values */
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	smsr &= MSR_FE0 | MSR_FE1 | MSR_SF | MSR_SE | MSR_BE | MSR_DE;
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	/* Process MSR values */
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	smsr |= MSR_ME | MSR_RI | MSR_IR | MSR_DR | MSR_PR | MSR_EE;
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	/* External providers the guest reserved */
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	smsr |= (vcpu->arch.shared->msr & vcpu->arch.guest_owned_ext);
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	/* 64-bit Process MSR values */
#ifdef CONFIG_PPC_BOOK3S_64
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	smsr |= MSR_ISF | MSR_HV;
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#endif
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	vcpu->arch.shadow_msr = smsr;
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}

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void kvmppc_set_msr(struct kvm_vcpu *vcpu, u64 msr)
{
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	ulong old_msr = vcpu->arch.shared->msr;
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#ifdef EXIT_DEBUG
	printk(KERN_INFO "KVM: Set MSR to 0x%llx\n", msr);
#endif
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	msr &= to_book3s(vcpu)->msr_mask;
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	vcpu->arch.shared->msr = msr;
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	kvmppc_recalc_shadow_msr(vcpu);
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	if (msr & MSR_POW) {
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		if (!vcpu->arch.pending_exceptions) {
			kvm_vcpu_block(vcpu);
			vcpu->stat.halt_wakeup++;
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			/* Unset POW bit after we woke up */
			msr &= ~MSR_POW;
			vcpu->arch.shared->msr = msr;
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		}
	}

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	if ((vcpu->arch.shared->msr & (MSR_PR|MSR_IR|MSR_DR)) !=
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		   (old_msr & (MSR_PR|MSR_IR|MSR_DR))) {
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		kvmppc_mmu_flush_segments(vcpu);
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		kvmppc_mmu_map_segment(vcpu, kvmppc_get_pc(vcpu));
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		/* Preload magic page segment when in kernel mode */
		if (!(msr & MSR_PR) && vcpu->arch.magic_page_pa) {
			struct kvm_vcpu_arch *a = &vcpu->arch;

			if (msr & MSR_DR)
				kvmppc_mmu_map_segment(vcpu, a->magic_page_ea);
			else
				kvmppc_mmu_map_segment(vcpu, a->magic_page_pa);
		}
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	}
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	/* Preload FPU if it's enabled */
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	if (vcpu->arch.shared->msr & MSR_FP)
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		kvmppc_handle_ext(vcpu, BOOK3S_INTERRUPT_FP_UNAVAIL, MSR_FP);
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}

void kvmppc_inject_interrupt(struct kvm_vcpu *vcpu, int vec, u64 flags)
{
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	vcpu->arch.shared->srr0 = kvmppc_get_pc(vcpu);
	vcpu->arch.shared->srr1 = vcpu->arch.shared->msr | flags;
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	kvmppc_set_pc(vcpu, to_book3s(vcpu)->hior + vec);
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	vcpu->arch.mmu.reset_msr(vcpu);
}

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static int kvmppc_book3s_vec2irqprio(unsigned int vec)
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{
	unsigned int prio;

	switch (vec) {
	case 0x100: prio = BOOK3S_IRQPRIO_SYSTEM_RESET;		break;
	case 0x200: prio = BOOK3S_IRQPRIO_MACHINE_CHECK;	break;
	case 0x300: prio = BOOK3S_IRQPRIO_DATA_STORAGE;		break;
	case 0x380: prio = BOOK3S_IRQPRIO_DATA_SEGMENT;		break;
	case 0x400: prio = BOOK3S_IRQPRIO_INST_STORAGE;		break;
	case 0x480: prio = BOOK3S_IRQPRIO_INST_SEGMENT;		break;
	case 0x500: prio = BOOK3S_IRQPRIO_EXTERNAL;		break;
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	case 0x501: prio = BOOK3S_IRQPRIO_EXTERNAL_LEVEL;	break;
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	case 0x600: prio = BOOK3S_IRQPRIO_ALIGNMENT;		break;
	case 0x700: prio = BOOK3S_IRQPRIO_PROGRAM;		break;
	case 0x800: prio = BOOK3S_IRQPRIO_FP_UNAVAIL;		break;
	case 0x900: prio = BOOK3S_IRQPRIO_DECREMENTER;		break;
	case 0xc00: prio = BOOK3S_IRQPRIO_SYSCALL;		break;
	case 0xd00: prio = BOOK3S_IRQPRIO_DEBUG;		break;
	case 0xf20: prio = BOOK3S_IRQPRIO_ALTIVEC;		break;
	case 0xf40: prio = BOOK3S_IRQPRIO_VSX;			break;
	default:    prio = BOOK3S_IRQPRIO_MAX;			break;
	}

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	return prio;
}

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static void kvmppc_book3s_dequeue_irqprio(struct kvm_vcpu *vcpu,
					  unsigned int vec)
{
	clear_bit(kvmppc_book3s_vec2irqprio(vec),
		  &vcpu->arch.pending_exceptions);
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	if (!vcpu->arch.pending_exceptions)
		vcpu->arch.shared->int_pending = 0;
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}

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void kvmppc_book3s_queue_irqprio(struct kvm_vcpu *vcpu, unsigned int vec)
{
	vcpu->stat.queue_intr++;

	set_bit(kvmppc_book3s_vec2irqprio(vec),
		&vcpu->arch.pending_exceptions);
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#ifdef EXIT_DEBUG
	printk(KERN_INFO "Queueing interrupt %x\n", vec);
#endif
}


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void kvmppc_core_queue_program(struct kvm_vcpu *vcpu, ulong flags)
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{
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	to_book3s(vcpu)->prog_flags = flags;
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	kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_PROGRAM);
}

void kvmppc_core_queue_dec(struct kvm_vcpu *vcpu)
{
	kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_DECREMENTER);
}

int kvmppc_core_pending_dec(struct kvm_vcpu *vcpu)
{
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	return test_bit(BOOK3S_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions);
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}

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void kvmppc_core_dequeue_dec(struct kvm_vcpu *vcpu)
{
	kvmppc_book3s_dequeue_irqprio(vcpu, BOOK3S_INTERRUPT_DECREMENTER);
}

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void kvmppc_core_queue_external(struct kvm_vcpu *vcpu,
                                struct kvm_interrupt *irq)
{
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	unsigned int vec = BOOK3S_INTERRUPT_EXTERNAL;

	if (irq->irq == KVM_INTERRUPT_SET_LEVEL)
		vec = BOOK3S_INTERRUPT_EXTERNAL_LEVEL;

	kvmppc_book3s_queue_irqprio(vcpu, vec);
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}

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void kvmppc_core_dequeue_external(struct kvm_vcpu *vcpu,
                                  struct kvm_interrupt *irq)
{
	kvmppc_book3s_dequeue_irqprio(vcpu, BOOK3S_INTERRUPT_EXTERNAL);
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	kvmppc_book3s_dequeue_irqprio(vcpu, BOOK3S_INTERRUPT_EXTERNAL_LEVEL);
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}

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int kvmppc_book3s_irqprio_deliver(struct kvm_vcpu *vcpu, unsigned int priority)
{
	int deliver = 1;
	int vec = 0;
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	ulong flags = 0ULL;
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	ulong crit_raw = vcpu->arch.shared->critical;
	ulong crit_r1 = kvmppc_get_gpr(vcpu, 1);
	bool crit;

	/* Truncate crit indicators in 32 bit mode */
	if (!(vcpu->arch.shared->msr & MSR_SF)) {
		crit_raw &= 0xffffffff;
		crit_r1 &= 0xffffffff;
	}

	/* Critical section when crit == r1 */
	crit = (crit_raw == crit_r1);
	/* ... and we're in supervisor mode */
	crit = crit && !(vcpu->arch.shared->msr & MSR_PR);
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	switch (priority) {
	case BOOK3S_IRQPRIO_DECREMENTER:
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		deliver = (vcpu->arch.shared->msr & MSR_EE) && !crit;
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		vec = BOOK3S_INTERRUPT_DECREMENTER;
		break;
	case BOOK3S_IRQPRIO_EXTERNAL:
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	case BOOK3S_IRQPRIO_EXTERNAL_LEVEL:
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		deliver = (vcpu->arch.shared->msr & MSR_EE) && !crit;
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		vec = BOOK3S_INTERRUPT_EXTERNAL;
		break;
	case BOOK3S_IRQPRIO_SYSTEM_RESET:
		vec = BOOK3S_INTERRUPT_SYSTEM_RESET;
		break;
	case BOOK3S_IRQPRIO_MACHINE_CHECK:
		vec = BOOK3S_INTERRUPT_MACHINE_CHECK;
		break;
	case BOOK3S_IRQPRIO_DATA_STORAGE:
		vec = BOOK3S_INTERRUPT_DATA_STORAGE;
		break;
	case BOOK3S_IRQPRIO_INST_STORAGE:
		vec = BOOK3S_INTERRUPT_INST_STORAGE;
		break;
	case BOOK3S_IRQPRIO_DATA_SEGMENT:
		vec = BOOK3S_INTERRUPT_DATA_SEGMENT;
		break;
	case BOOK3S_IRQPRIO_INST_SEGMENT:
		vec = BOOK3S_INTERRUPT_INST_SEGMENT;
		break;
	case BOOK3S_IRQPRIO_ALIGNMENT:
		vec = BOOK3S_INTERRUPT_ALIGNMENT;
		break;
	case BOOK3S_IRQPRIO_PROGRAM:
		vec = BOOK3S_INTERRUPT_PROGRAM;
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		flags = to_book3s(vcpu)->prog_flags;
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		break;
	case BOOK3S_IRQPRIO_VSX:
		vec = BOOK3S_INTERRUPT_VSX;
		break;
	case BOOK3S_IRQPRIO_ALTIVEC:
		vec = BOOK3S_INTERRUPT_ALTIVEC;
		break;
	case BOOK3S_IRQPRIO_FP_UNAVAIL:
		vec = BOOK3S_INTERRUPT_FP_UNAVAIL;
		break;
	case BOOK3S_IRQPRIO_SYSCALL:
		vec = BOOK3S_INTERRUPT_SYSCALL;
		break;
	case BOOK3S_IRQPRIO_DEBUG:
		vec = BOOK3S_INTERRUPT_TRACE;
		break;
	case BOOK3S_IRQPRIO_PERFORMANCE_MONITOR:
		vec = BOOK3S_INTERRUPT_PERFMON;
		break;
	default:
		deliver = 0;
		printk(KERN_ERR "KVM: Unknown interrupt: 0x%x\n", priority);
		break;
	}

#if 0
	printk(KERN_INFO "Deliver interrupt 0x%x? %x\n", vec, deliver);
#endif

	if (deliver)
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		kvmppc_inject_interrupt(vcpu, vec, flags);
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	return deliver;
}

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/*
 * This function determines if an irqprio should be cleared once issued.
 */
static bool clear_irqprio(struct kvm_vcpu *vcpu, unsigned int priority)
{
	switch (priority) {
		case BOOK3S_IRQPRIO_DECREMENTER:
			/* DEC interrupts get cleared by mtdec */
			return false;
		case BOOK3S_IRQPRIO_EXTERNAL_LEVEL:
			/* External interrupts get cleared by userspace */
			return false;
	}

	return true;
}

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void kvmppc_core_deliver_interrupts(struct kvm_vcpu *vcpu)
{
	unsigned long *pending = &vcpu->arch.pending_exceptions;
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	unsigned long old_pending = vcpu->arch.pending_exceptions;
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	unsigned int priority;

#ifdef EXIT_DEBUG
	if (vcpu->arch.pending_exceptions)
		printk(KERN_EMERG "KVM: Check pending: %lx\n", vcpu->arch.pending_exceptions);
#endif
	priority = __ffs(*pending);
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	while (priority < BOOK3S_IRQPRIO_MAX) {
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		if (kvmppc_book3s_irqprio_deliver(vcpu, priority) &&
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		    clear_irqprio(vcpu, priority)) {
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			clear_bit(priority, &vcpu->arch.pending_exceptions);
			break;
		}

		priority = find_next_bit(pending,
					 BITS_PER_BYTE * sizeof(*pending),
					 priority + 1);
	}
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	/* Tell the guest about our interrupt status */
	if (*pending)
		vcpu->arch.shared->int_pending = 1;
	else if (old_pending)
		vcpu->arch.shared->int_pending = 0;
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}

void kvmppc_set_pvr(struct kvm_vcpu *vcpu, u32 pvr)
{
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	u32 host_pvr;

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	vcpu->arch.hflags &= ~BOOK3S_HFLAG_SLB;
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	vcpu->arch.pvr = pvr;
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#ifdef CONFIG_PPC_BOOK3S_64
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	if ((pvr >= 0x330000) && (pvr < 0x70330000)) {
		kvmppc_mmu_book3s_64_init(vcpu);
		to_book3s(vcpu)->hior = 0xfff00000;
		to_book3s(vcpu)->msr_mask = 0xffffffffffffffffULL;
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	} else
#endif
	{
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		kvmppc_mmu_book3s_32_init(vcpu);
		to_book3s(vcpu)->hior = 0;
		to_book3s(vcpu)->msr_mask = 0xffffffffULL;
	}

	/* If we are in hypervisor level on 970, we can tell the CPU to
	 * treat DCBZ as 32 bytes store */
	vcpu->arch.hflags &= ~BOOK3S_HFLAG_DCBZ32;
	if (vcpu->arch.mmu.is_dcbz32(vcpu) && (mfmsr() & MSR_HV) &&
	    !strcmp(cur_cpu_spec->platform, "ppc970"))
		vcpu->arch.hflags |= BOOK3S_HFLAG_DCBZ32;

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	/* Cell performs badly if MSR_FEx are set. So let's hope nobody
	   really needs them in a VM on Cell and force disable them. */
	if (!strcmp(cur_cpu_spec->platform, "ppc-cell-be"))
		to_book3s(vcpu)->msr_mask &= ~(MSR_FE0 | MSR_FE1);
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#ifdef CONFIG_PPC_BOOK3S_32
	/* 32 bit Book3S always has 32 byte dcbz */
	vcpu->arch.hflags |= BOOK3S_HFLAG_DCBZ32;
#endif
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	/* On some CPUs we can execute paired single operations natively */
	asm ( "mfpvr %0" : "=r"(host_pvr));
	switch (host_pvr) {
	case 0x00080200:	/* lonestar 2.0 */
	case 0x00088202:	/* lonestar 2.2 */
	case 0x70000100:	/* gekko 1.0 */
	case 0x00080100:	/* gekko 2.0 */
	case 0x00083203:	/* gekko 2.3a */
	case 0x00083213:	/* gekko 2.3b */
	case 0x00083204:	/* gekko 2.4 */
	case 0x00083214:	/* gekko 2.4e (8SE) - retail HW2 */
	case 0x00087200:	/* broadway */
		vcpu->arch.hflags |= BOOK3S_HFLAG_NATIVE_PS;
		/* Enable HID2.PSE - in case we need it later */
		mtspr(SPRN_HID2_GEKKO, mfspr(SPRN_HID2_GEKKO) | (1 << 29));
	}
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}

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pfn_t kvmppc_gfn_to_pfn(struct kvm_vcpu *vcpu, gfn_t gfn)
{
	ulong mp_pa = vcpu->arch.magic_page_pa;

	/* Magic page override */
	if (unlikely(mp_pa) &&
	    unlikely(((gfn << PAGE_SHIFT) & KVM_PAM) ==
		     ((mp_pa & PAGE_MASK) & KVM_PAM))) {
		ulong shared_page = ((ulong)vcpu->arch.shared) & PAGE_MASK;
		pfn_t pfn;

		pfn = (pfn_t)virt_to_phys((void*)shared_page) >> PAGE_SHIFT;
		get_page(pfn_to_page(pfn));
		return pfn;
	}

	return gfn_to_pfn(vcpu->kvm, gfn);
}

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/* Book3s_32 CPUs always have 32 bytes cache line size, which Linux assumes. To
 * make Book3s_32 Linux work on Book3s_64, we have to make sure we trap dcbz to
 * emulate 32 bytes dcbz length.
 *
 * The Book3s_64 inventors also realized this case and implemented a special bit
 * in the HID5 register, which is a hypervisor ressource. Thus we can't use it.
 *
 * My approach here is to patch the dcbz instruction on executing pages.
 */
static void kvmppc_patch_dcbz(struct kvm_vcpu *vcpu, struct kvmppc_pte *pte)
{
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	struct page *hpage;
	u64 hpage_offset;
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	u32 *page;
	int i;

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	hpage = gfn_to_page(vcpu->kvm, pte->raddr >> PAGE_SHIFT);
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	if (is_error_page(hpage)) {
		kvm_release_page_clean(hpage);
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		return;
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	}
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	hpage_offset = pte->raddr & ~PAGE_MASK;
	hpage_offset &= ~0xFFFULL;
	hpage_offset /= 4;
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	get_page(hpage);
	page = kmap_atomic(hpage, KM_USER0);
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	/* patch dcbz into reserved instruction, so we trap */
	for (i=hpage_offset; i < hpage_offset + (HW_PAGE_SIZE / 4); i++)
		if ((page[i] & 0xff0007ff) == INS_DCBZ)
			page[i] &= 0xfffffff7;
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	kunmap_atomic(page, KM_USER0);
	put_page(hpage);
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}

static int kvmppc_xlate(struct kvm_vcpu *vcpu, ulong eaddr, bool data,
			 struct kvmppc_pte *pte)
{
517
	int relocated = (vcpu->arch.shared->msr & (data ? MSR_DR : MSR_IR));
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	int r;

	if (relocated) {
		r = vcpu->arch.mmu.xlate(vcpu, eaddr, pte, data);
	} else {
		pte->eaddr = eaddr;
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		pte->raddr = eaddr & KVM_PAM;
525
		pte->vpage = VSID_REAL | eaddr >> 12;
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		pte->may_read = true;
		pte->may_write = true;
		pte->may_execute = true;
		r = 0;
	}

	return r;
}

static hva_t kvmppc_bad_hva(void)
{
	return PAGE_OFFSET;
}

static hva_t kvmppc_pte_to_hva(struct kvm_vcpu *vcpu, struct kvmppc_pte *pte,
			       bool read)
{
	hva_t hpage;

	if (read && !pte->may_read)
		goto err;

	if (!read && !pte->may_write)
		goto err;

	hpage = gfn_to_hva(vcpu->kvm, pte->raddr >> PAGE_SHIFT);
	if (kvm_is_error_hva(hpage))
		goto err;

	return hpage | (pte->raddr & ~PAGE_MASK);
err:
	return kvmppc_bad_hva();
}

560 561
int kvmppc_st(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
	      bool data)
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{
	struct kvmppc_pte pte;

	vcpu->stat.st++;

567
	if (kvmppc_xlate(vcpu, *eaddr, data, &pte))
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		return -ENOENT;
569 570

	*eaddr = pte.raddr;
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	if (!pte.may_write)
		return -EPERM;
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	if (kvm_write_guest(vcpu->kvm, pte.raddr, ptr, size))
		return EMULATE_DO_MMIO;
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578
	return EMULATE_DONE;
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}

581
int kvmppc_ld(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
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		      bool data)
{
	struct kvmppc_pte pte;
585
	hva_t hva = *eaddr;
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	vcpu->stat.ld++;

589 590 591 592
	if (kvmppc_xlate(vcpu, *eaddr, data, &pte))
		goto nopte;

	*eaddr = pte.raddr;
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	hva = kvmppc_pte_to_hva(vcpu, &pte, true);
	if (kvm_is_error_hva(hva))
596
		goto mmio;
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	if (copy_from_user(ptr, (void __user *)hva, size)) {
		printk(KERN_INFO "kvmppc_ld at 0x%lx failed\n", hva);
600
		goto mmio;
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	}

603
	return EMULATE_DONE;
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605
nopte:
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	return -ENOENT;
607 608
mmio:
	return EMULATE_DO_MMIO;
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}

static int kvmppc_visible_gfn(struct kvm_vcpu *vcpu, gfn_t gfn)
{
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	ulong mp_pa = vcpu->arch.magic_page_pa;

	if (unlikely(mp_pa) &&
	    unlikely((mp_pa & KVM_PAM) >> PAGE_SHIFT == gfn)) {
		return 1;
	}

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	return kvm_is_visible_gfn(vcpu->kvm, gfn);
}

int kvmppc_handle_pagefault(struct kvm_run *run, struct kvm_vcpu *vcpu,
			    ulong eaddr, int vec)
{
	bool data = (vec == BOOK3S_INTERRUPT_DATA_STORAGE);
	int r = RESUME_GUEST;
	int relocated;
	int page_found = 0;
	struct kvmppc_pte pte;
	bool is_mmio = false;
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	bool dr = (vcpu->arch.shared->msr & MSR_DR) ? true : false;
	bool ir = (vcpu->arch.shared->msr & MSR_IR) ? true : false;
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	u64 vsid;
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636
	relocated = data ? dr : ir;
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	/* Resolve real address if translation turned on */
	if (relocated) {
		page_found = vcpu->arch.mmu.xlate(vcpu, eaddr, &pte, data);
	} else {
		pte.may_execute = true;
		pte.may_read = true;
		pte.may_write = true;
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		pte.raddr = eaddr & KVM_PAM;
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		pte.eaddr = eaddr;
		pte.vpage = eaddr >> 12;
648 649
	}

650
	switch (vcpu->arch.shared->msr & (MSR_DR|MSR_IR)) {
651
	case 0:
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		pte.vpage |= ((u64)VSID_REAL << (SID_SHIFT - 12));
653 654 655
		break;
	case MSR_DR:
	case MSR_IR:
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		vcpu->arch.mmu.esid_to_vsid(vcpu, eaddr >> SID_SHIFT, &vsid);

658
		if ((vcpu->arch.shared->msr & (MSR_DR|MSR_IR)) == MSR_DR)
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			pte.vpage |= ((u64)VSID_REAL_DR << (SID_SHIFT - 12));
		else
			pte.vpage |= ((u64)VSID_REAL_IR << (SID_SHIFT - 12));
		pte.vpage |= vsid;

		if (vsid == -1)
			page_found = -EINVAL;
666
		break;
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	}

	if (vcpu->arch.mmu.is_dcbz32(vcpu) &&
	   (!(vcpu->arch.hflags & BOOK3S_HFLAG_DCBZ32))) {
		/*
		 * If we do the dcbz hack, we have to NX on every execution,
		 * so we can patch the executing code. This renders our guest
		 * NX-less.
		 */
		pte.may_execute = !data;
	}

	if (page_found == -ENOENT) {
		/* Page not found in guest PTE entries */
681
		vcpu->arch.shared->dar = kvmppc_get_fault_dar(vcpu);
682
		vcpu->arch.shared->dsisr = to_svcpu(vcpu)->fault_dsisr;
683 684
		vcpu->arch.shared->msr |=
			(to_svcpu(vcpu)->shadow_srr1 & 0x00000000f8000000ULL);
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		kvmppc_book3s_queue_irqprio(vcpu, vec);
	} else if (page_found == -EPERM) {
		/* Storage protection */
688
		vcpu->arch.shared->dar = kvmppc_get_fault_dar(vcpu);
689 690 691
		vcpu->arch.shared->dsisr =
			to_svcpu(vcpu)->fault_dsisr & ~DSISR_NOHPTE;
		vcpu->arch.shared->dsisr |= DSISR_PROTFAULT;
692 693
		vcpu->arch.shared->msr |=
			(to_svcpu(vcpu)->shadow_srr1 & 0x00000000f8000000ULL);
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		kvmppc_book3s_queue_irqprio(vcpu, vec);
	} else if (page_found == -EINVAL) {
		/* Page not found in guest SLB */
697
		vcpu->arch.shared->dar = kvmppc_get_fault_dar(vcpu);
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		kvmppc_book3s_queue_irqprio(vcpu, vec + 0x80);
	} else if (!is_mmio &&
		   kvmppc_visible_gfn(vcpu, pte.raddr >> PAGE_SHIFT)) {
		/* The guest's PTE is not mapped yet. Map on the host */
		kvmppc_mmu_map_page(vcpu, &pte);
		if (data)
			vcpu->stat.sp_storage++;
		else if (vcpu->arch.mmu.is_dcbz32(vcpu) &&
			(!(vcpu->arch.hflags & BOOK3S_HFLAG_DCBZ32)))
			kvmppc_patch_dcbz(vcpu, &pte);
	} else {
		/* MMIO */
		vcpu->stat.mmio_exits++;
		vcpu->arch.paddr_accessed = pte.raddr;
		r = kvmppc_emulate_mmio(run, vcpu);
		if ( r == RESUME_HOST_NV )
			r = RESUME_HOST;
	}

	return r;
}

720 721 722 723 724 725 726 727 728
static inline int get_fpr_index(int i)
{
#ifdef CONFIG_VSX
	i *= 2;
#endif
	return i;
}

/* Give up external provider (FPU, Altivec, VSX) */
729
void kvmppc_giveup_ext(struct kvm_vcpu *vcpu, ulong msr)
730 731 732
{
	struct thread_struct *t = &current->thread;
	u64 *vcpu_fpr = vcpu->arch.fpr;
733
#ifdef CONFIG_VSX
734
	u64 *vcpu_vsx = vcpu->arch.vsr;
735
#endif
736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773
	u64 *thread_fpr = (u64*)t->fpr;
	int i;

	if (!(vcpu->arch.guest_owned_ext & msr))
		return;

#ifdef DEBUG_EXT
	printk(KERN_INFO "Giving up ext 0x%lx\n", msr);
#endif

	switch (msr) {
	case MSR_FP:
		giveup_fpu(current);
		for (i = 0; i < ARRAY_SIZE(vcpu->arch.fpr); i++)
			vcpu_fpr[i] = thread_fpr[get_fpr_index(i)];

		vcpu->arch.fpscr = t->fpscr.val;
		break;
	case MSR_VEC:
#ifdef CONFIG_ALTIVEC
		giveup_altivec(current);
		memcpy(vcpu->arch.vr, t->vr, sizeof(vcpu->arch.vr));
		vcpu->arch.vscr = t->vscr;
#endif
		break;
	case MSR_VSX:
#ifdef CONFIG_VSX
		__giveup_vsx(current);
		for (i = 0; i < ARRAY_SIZE(vcpu->arch.vsr); i++)
			vcpu_vsx[i] = thread_fpr[get_fpr_index(i) + 1];
#endif
		break;
	default:
		BUG();
	}

	vcpu->arch.guest_owned_ext &= ~msr;
	current->thread.regs->msr &= ~msr;
774
	kvmppc_recalc_shadow_msr(vcpu);
775 776
}

777
static int kvmppc_read_inst(struct kvm_vcpu *vcpu)
778
{
779 780
	ulong srr0 = kvmppc_get_pc(vcpu);
	u32 last_inst = kvmppc_get_last_inst(vcpu);
781 782
	int ret;

783
	ret = kvmppc_ld(vcpu, &srr0, sizeof(u32), &last_inst, false);
784
	if (ret == -ENOENT) {
785 786 787 788 789
		ulong msr = vcpu->arch.shared->msr;

		msr = kvmppc_set_field(msr, 33, 33, 1);
		msr = kvmppc_set_field(msr, 34, 36, 0);
		vcpu->arch.shared->msr = kvmppc_set_field(msr, 42, 47, 0);
790
		kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_INST_STORAGE);
791 792 793 794 795 796 797 798 799 800 801 802 803 804 805
		return EMULATE_AGAIN;
	}

	return EMULATE_DONE;
}

static int kvmppc_check_ext(struct kvm_vcpu *vcpu, unsigned int exit_nr)
{

	/* Need to do paired single emulation? */
	if (!(vcpu->arch.hflags & BOOK3S_HFLAG_PAIRED_SINGLE))
		return EMULATE_DONE;

	/* Read out the instruction */
	if (kvmppc_read_inst(vcpu) == EMULATE_DONE)
806 807 808 809 810 811
		/* Need to emulate */
		return EMULATE_FAIL;

	return EMULATE_AGAIN;
}

812 813 814 815 816 817
/* Handle external providers (FPU, Altivec, VSX) */
static int kvmppc_handle_ext(struct kvm_vcpu *vcpu, unsigned int exit_nr,
			     ulong msr)
{
	struct thread_struct *t = &current->thread;
	u64 *vcpu_fpr = vcpu->arch.fpr;
818
#ifdef CONFIG_VSX
819
	u64 *vcpu_vsx = vcpu->arch.vsr;
820
#endif
821 822 823
	u64 *thread_fpr = (u64*)t->fpr;
	int i;

824 825 826 827
	/* When we have paired singles, we emulate in software */
	if (vcpu->arch.hflags & BOOK3S_HFLAG_PAIRED_SINGLE)
		return RESUME_GUEST;

828
	if (!(vcpu->arch.shared->msr & msr)) {
829 830 831 832
		kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
		return RESUME_GUEST;
	}

833 834 835 836 837
	/* We already own the ext */
	if (vcpu->arch.guest_owned_ext & msr) {
		return RESUME_GUEST;
	}

838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873
#ifdef DEBUG_EXT
	printk(KERN_INFO "Loading up ext 0x%lx\n", msr);
#endif

	current->thread.regs->msr |= msr;

	switch (msr) {
	case MSR_FP:
		for (i = 0; i < ARRAY_SIZE(vcpu->arch.fpr); i++)
			thread_fpr[get_fpr_index(i)] = vcpu_fpr[i];

		t->fpscr.val = vcpu->arch.fpscr;
		t->fpexc_mode = 0;
		kvmppc_load_up_fpu();
		break;
	case MSR_VEC:
#ifdef CONFIG_ALTIVEC
		memcpy(t->vr, vcpu->arch.vr, sizeof(vcpu->arch.vr));
		t->vscr = vcpu->arch.vscr;
		t->vrsave = -1;
		kvmppc_load_up_altivec();
#endif
		break;
	case MSR_VSX:
#ifdef CONFIG_VSX
		for (i = 0; i < ARRAY_SIZE(vcpu->arch.vsr); i++)
			thread_fpr[get_fpr_index(i) + 1] = vcpu_vsx[i];
		kvmppc_load_up_vsx();
#endif
		break;
	default:
		BUG();
	}

	vcpu->arch.guest_owned_ext |= msr;

874
	kvmppc_recalc_shadow_msr(vcpu);
875 876 877 878

	return RESUME_GUEST;
}

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int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu,
                       unsigned int exit_nr)
{
	int r = RESUME_HOST;

	vcpu->stat.sum_exits++;

	run->exit_reason = KVM_EXIT_UNKNOWN;
	run->ready_for_interrupt_injection = 1;
888 889

	trace_kvm_book3s_exit(exit_nr, vcpu);
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890 891 892 893
	kvm_resched(vcpu);
	switch (exit_nr) {
	case BOOK3S_INTERRUPT_INST_STORAGE:
		vcpu->stat.pf_instruc++;
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#ifdef CONFIG_PPC_BOOK3S_32
		/* We set segments as unused segments when invalidating them. So
		 * treat the respective fault as segment fault. */
		if (to_svcpu(vcpu)->sr[kvmppc_get_pc(vcpu) >> SID_SHIFT]
		    == SR_INVALID) {
			kvmppc_mmu_map_segment(vcpu, kvmppc_get_pc(vcpu));
			r = RESUME_GUEST;
			break;
		}
#endif

A
Alexander Graf 已提交
906
		/* only care about PTEG not found errors, but leave NX alone */
907 908
		if (to_svcpu(vcpu)->shadow_srr1 & 0x40000000) {
			r = kvmppc_handle_pagefault(run, vcpu, kvmppc_get_pc(vcpu), exit_nr);
A
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			vcpu->stat.sp_instruc++;
		} else if (vcpu->arch.mmu.is_dcbz32(vcpu) &&
			  (!(vcpu->arch.hflags & BOOK3S_HFLAG_DCBZ32))) {
			/*
			 * XXX If we do the dcbz hack we use the NX bit to flush&patch the page,
			 *     so we can't use the NX bit inside the guest. Let's cross our fingers,
			 *     that no guest that needs the dcbz hack does NX.
			 */
A
Alexander Graf 已提交
917
			kvmppc_mmu_pte_flush(vcpu, kvmppc_get_pc(vcpu), ~0xFFFUL);
A
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918
			r = RESUME_GUEST;
A
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919
		} else {
920 921
			vcpu->arch.shared->msr |=
				to_svcpu(vcpu)->shadow_srr1 & 0x58000000;
A
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922 923 924 925 926
			kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
			r = RESUME_GUEST;
		}
		break;
	case BOOK3S_INTERRUPT_DATA_STORAGE:
927 928
	{
		ulong dar = kvmppc_get_fault_dar(vcpu);
A
Alexander Graf 已提交
929
		vcpu->stat.pf_storage++;
A
Alexander Graf 已提交
930 931 932 933 934 935 936 937 938 939 940

#ifdef CONFIG_PPC_BOOK3S_32
		/* We set segments as unused segments when invalidating them. So
		 * treat the respective fault as segment fault. */
		if ((to_svcpu(vcpu)->sr[dar >> SID_SHIFT]) == SR_INVALID) {
			kvmppc_mmu_map_segment(vcpu, dar);
			r = RESUME_GUEST;
			break;
		}
#endif

A
Alexander Graf 已提交
941
		/* The only case we need to handle is missing shadow PTEs */
942 943
		if (to_svcpu(vcpu)->fault_dsisr & DSISR_NOHPTE) {
			r = kvmppc_handle_pagefault(run, vcpu, dar, exit_nr);
A
Alexander Graf 已提交
944
		} else {
945
			vcpu->arch.shared->dar = dar;
946
			vcpu->arch.shared->dsisr = to_svcpu(vcpu)->fault_dsisr;
A
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947 948 949 950
			kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
			r = RESUME_GUEST;
		}
		break;
951
	}
A
Alexander Graf 已提交
952
	case BOOK3S_INTERRUPT_DATA_SEGMENT:
953
		if (kvmppc_mmu_map_segment(vcpu, kvmppc_get_fault_dar(vcpu)) < 0) {
954
			vcpu->arch.shared->dar = kvmppc_get_fault_dar(vcpu);
A
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955 956 957 958 959 960
			kvmppc_book3s_queue_irqprio(vcpu,
				BOOK3S_INTERRUPT_DATA_SEGMENT);
		}
		r = RESUME_GUEST;
		break;
	case BOOK3S_INTERRUPT_INST_SEGMENT:
961
		if (kvmppc_mmu_map_segment(vcpu, kvmppc_get_pc(vcpu)) < 0) {
A
Alexander Graf 已提交
962 963 964 965 966 967 968 969 970 971 972 973 974 975
			kvmppc_book3s_queue_irqprio(vcpu,
				BOOK3S_INTERRUPT_INST_SEGMENT);
		}
		r = RESUME_GUEST;
		break;
	/* We're good on these - the host merely wanted to get our attention */
	case BOOK3S_INTERRUPT_DECREMENTER:
		vcpu->stat.dec_exits++;
		r = RESUME_GUEST;
		break;
	case BOOK3S_INTERRUPT_EXTERNAL:
		vcpu->stat.ext_intr_exits++;
		r = RESUME_GUEST;
		break;
976 977 978
	case BOOK3S_INTERRUPT_PERFMON:
		r = RESUME_GUEST;
		break;
A
Alexander Graf 已提交
979 980 981
	case BOOK3S_INTERRUPT_PROGRAM:
	{
		enum emulation_result er;
982 983
		ulong flags;

984
program_interrupt:
985
		flags = to_svcpu(vcpu)->shadow_srr1 & 0x1f0000ull;
A
Alexander Graf 已提交
986

987
		if (vcpu->arch.shared->msr & MSR_PR) {
A
Alexander Graf 已提交
988
#ifdef EXIT_DEBUG
989
			printk(KERN_INFO "Userspace triggered 0x700 exception at 0x%lx (0x%x)\n", kvmppc_get_pc(vcpu), kvmppc_get_last_inst(vcpu));
A
Alexander Graf 已提交
990
#endif
991
			if ((kvmppc_get_last_inst(vcpu) & 0xff0007ff) !=
A
Alexander Graf 已提交
992
			    (INS_DCBZ & 0xfffffff7)) {
993
				kvmppc_core_queue_program(vcpu, flags);
A
Alexander Graf 已提交
994 995 996 997 998 999 1000 1001 1002
				r = RESUME_GUEST;
				break;
			}
		}

		vcpu->stat.emulated_inst_exits++;
		er = kvmppc_emulate_instruction(run, vcpu);
		switch (er) {
		case EMULATE_DONE:
1003
			r = RESUME_GUEST_NV;
A
Alexander Graf 已提交
1004
			break;
1005 1006 1007
		case EMULATE_AGAIN:
			r = RESUME_GUEST;
			break;
A
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1008 1009
		case EMULATE_FAIL:
			printk(KERN_CRIT "%s: emulation at %lx failed (%08x)\n",
1010
			       __func__, kvmppc_get_pc(vcpu), kvmppc_get_last_inst(vcpu));
1011
			kvmppc_core_queue_program(vcpu, flags);
A
Alexander Graf 已提交
1012 1013
			r = RESUME_GUEST;
			break;
1014 1015 1016 1017
		case EMULATE_DO_MMIO:
			run->exit_reason = KVM_EXIT_MMIO;
			r = RESUME_HOST_NV;
			break;
A
Alexander Graf 已提交
1018 1019 1020 1021 1022 1023
		default:
			BUG();
		}
		break;
	}
	case BOOK3S_INTERRUPT_SYSCALL:
1024 1025 1026
		if (vcpu->arch.osi_enabled &&
		    (((u32)kvmppc_get_gpr(vcpu, 3)) == OSI_SC_MAGIC_R3) &&
		    (((u32)kvmppc_get_gpr(vcpu, 4)) == OSI_SC_MAGIC_R4)) {
1027
			/* MOL hypercalls */
1028 1029 1030 1031 1032 1033 1034 1035
			u64 *gprs = run->osi.gprs;
			int i;

			run->exit_reason = KVM_EXIT_OSI;
			for (i = 0; i < 32; i++)
				gprs[i] = kvmppc_get_gpr(vcpu, i);
			vcpu->arch.osi_needed = 1;
			r = RESUME_HOST_NV;
1036 1037 1038 1039 1040
		} else if (!(vcpu->arch.shared->msr & MSR_PR) &&
		    (((u32)kvmppc_get_gpr(vcpu, 0)) == KVM_SC_MAGIC_R0)) {
			/* KVM PV hypercalls */
			kvmppc_set_gpr(vcpu, 3, kvmppc_kvm_pv(vcpu));
			r = RESUME_GUEST;
1041
		} else {
1042
			/* Guest syscalls */
1043 1044 1045 1046
			vcpu->stat.syscall_exits++;
			kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
			r = RESUME_GUEST;
		}
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Alexander Graf 已提交
1047 1048 1049 1050
		break;
	case BOOK3S_INTERRUPT_FP_UNAVAIL:
	case BOOK3S_INTERRUPT_ALTIVEC:
	case BOOK3S_INTERRUPT_VSX:
1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072
	{
		int ext_msr = 0;

		switch (exit_nr) {
		case BOOK3S_INTERRUPT_FP_UNAVAIL: ext_msr = MSR_FP;  break;
		case BOOK3S_INTERRUPT_ALTIVEC:    ext_msr = MSR_VEC; break;
		case BOOK3S_INTERRUPT_VSX:        ext_msr = MSR_VSX; break;
		}

		switch (kvmppc_check_ext(vcpu, exit_nr)) {
		case EMULATE_DONE:
			/* everything ok - let's enable the ext */
			r = kvmppc_handle_ext(vcpu, exit_nr, ext_msr);
			break;
		case EMULATE_FAIL:
			/* we need to emulate this instruction */
			goto program_interrupt;
			break;
		default:
			/* nothing to worry about - go again */
			break;
		}
1073
		break;
1074
	}
1075 1076
	case BOOK3S_INTERRUPT_ALIGNMENT:
		if (kvmppc_read_inst(vcpu) == EMULATE_DONE) {
1077
			vcpu->arch.shared->dsisr = kvmppc_alignment_dsisr(vcpu,
1078
				kvmppc_get_last_inst(vcpu));
1079
			vcpu->arch.shared->dar = kvmppc_alignment_dar(vcpu,
1080
				kvmppc_get_last_inst(vcpu));
1081 1082 1083 1084
			kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
		}
		r = RESUME_GUEST;
		break;
1085 1086
	case BOOK3S_INTERRUPT_MACHINE_CHECK:
	case BOOK3S_INTERRUPT_TRACE:
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Alexander Graf 已提交
1087 1088 1089 1090 1091
		kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
		r = RESUME_GUEST;
		break;
	default:
		/* Ugh - bork here! What did we get? */
1092
		printk(KERN_EMERG "exit_nr=0x%x | pc=0x%lx | msr=0x%lx\n",
1093
			exit_nr, kvmppc_get_pc(vcpu), to_svcpu(vcpu)->shadow_srr1);
A
Alexander Graf 已提交
1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118
		r = RESUME_HOST;
		BUG();
		break;
	}


	if (!(r & RESUME_HOST)) {
		/* To avoid clobbering exit_reason, only check for signals if
		 * we aren't already exiting to userspace for some other
		 * reason. */
		if (signal_pending(current)) {
#ifdef EXIT_DEBUG
			printk(KERN_EMERG "KVM: Going back to host\n");
#endif
			vcpu->stat.signal_exits++;
			run->exit_reason = KVM_EXIT_INTR;
			r = -EINTR;
		} else {
			/* In case an interrupt came in that was triggered
			 * from userspace (like DEC), we need to check what
			 * to inject now! */
			kvmppc_core_deliver_interrupts(vcpu);
		}
	}

1119
	trace_kvm_book3s_reenter(r, vcpu);
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1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132

	return r;
}

int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
{
	return 0;
}

int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
{
	int i;

1133
	regs->pc = kvmppc_get_pc(vcpu);
1134
	regs->cr = kvmppc_get_cr(vcpu);
1135 1136
	regs->ctr = kvmppc_get_ctr(vcpu);
	regs->lr = kvmppc_get_lr(vcpu);
1137
	regs->xer = kvmppc_get_xer(vcpu);
1138
	regs->msr = vcpu->arch.shared->msr;
1139 1140
	regs->srr0 = vcpu->arch.shared->srr0;
	regs->srr1 = vcpu->arch.shared->srr1;
A
Alexander Graf 已提交
1141
	regs->pid = vcpu->arch.pid;
1142 1143 1144 1145
	regs->sprg0 = vcpu->arch.shared->sprg0;
	regs->sprg1 = vcpu->arch.shared->sprg1;
	regs->sprg2 = vcpu->arch.shared->sprg2;
	regs->sprg3 = vcpu->arch.shared->sprg3;
1146 1147 1148 1149
	regs->sprg4 = vcpu->arch.sprg4;
	regs->sprg5 = vcpu->arch.sprg5;
	regs->sprg6 = vcpu->arch.sprg6;
	regs->sprg7 = vcpu->arch.sprg7;
A
Alexander Graf 已提交
1150 1151

	for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
1152
		regs->gpr[i] = kvmppc_get_gpr(vcpu, i);
A
Alexander Graf 已提交
1153 1154 1155 1156 1157 1158 1159 1160

	return 0;
}

int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
{
	int i;

1161
	kvmppc_set_pc(vcpu, regs->pc);
1162
	kvmppc_set_cr(vcpu, regs->cr);
1163 1164
	kvmppc_set_ctr(vcpu, regs->ctr);
	kvmppc_set_lr(vcpu, regs->lr);
1165
	kvmppc_set_xer(vcpu, regs->xer);
A
Alexander Graf 已提交
1166
	kvmppc_set_msr(vcpu, regs->msr);
1167 1168
	vcpu->arch.shared->srr0 = regs->srr0;
	vcpu->arch.shared->srr1 = regs->srr1;
1169 1170 1171 1172
	vcpu->arch.shared->sprg0 = regs->sprg0;
	vcpu->arch.shared->sprg1 = regs->sprg1;
	vcpu->arch.shared->sprg2 = regs->sprg2;
	vcpu->arch.shared->sprg3 = regs->sprg3;
1173 1174 1175 1176
	vcpu->arch.sprg4 = regs->sprg4;
	vcpu->arch.sprg5 = regs->sprg5;
	vcpu->arch.sprg6 = regs->sprg6;
	vcpu->arch.sprg7 = regs->sprg7;
A
Alexander Graf 已提交
1177

1178 1179
	for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
		kvmppc_set_gpr(vcpu, i, regs->gpr[i]);
A
Alexander Graf 已提交
1180 1181 1182 1183 1184 1185 1186

	return 0;
}

int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
                                  struct kvm_sregs *sregs)
{
1187 1188 1189
	struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
	int i;

A
Alexander Graf 已提交
1190
	sregs->pvr = vcpu->arch.pvr;
1191 1192 1193 1194

	sregs->u.s.sdr1 = to_book3s(vcpu)->sdr1;
	if (vcpu->arch.hflags & BOOK3S_HFLAG_SLB) {
		for (i = 0; i < 64; i++) {
1195 1196
			sregs->u.s.ppc64.slb[i].slbe = vcpu->arch.slb[i].orige | i;
			sregs->u.s.ppc64.slb[i].slbv = vcpu->arch.slb[i].origv;
1197 1198
		}
	} else {
1199 1200 1201
		for (i = 0; i < 16; i++)
			sregs->u.s.ppc32.sr[i] = vcpu->arch.shared->sr[i];

1202 1203 1204 1205 1206
		for (i = 0; i < 8; i++) {
			sregs->u.s.ppc32.ibat[i] = vcpu3s->ibat[i].raw;
			sregs->u.s.ppc32.dbat[i] = vcpu3s->dbat[i].raw;
		}
	}
1207

A
Alexander Graf 已提交
1208 1209 1210 1211 1212 1213
	return 0;
}

int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
                                  struct kvm_sregs *sregs)
{
1214 1215 1216
	struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
	int i;

A
Alexander Graf 已提交
1217
	kvmppc_set_pvr(vcpu, sregs->pvr);
1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242

	vcpu3s->sdr1 = sregs->u.s.sdr1;
	if (vcpu->arch.hflags & BOOK3S_HFLAG_SLB) {
		for (i = 0; i < 64; i++) {
			vcpu->arch.mmu.slbmte(vcpu, sregs->u.s.ppc64.slb[i].slbv,
						    sregs->u.s.ppc64.slb[i].slbe);
		}
	} else {
		for (i = 0; i < 16; i++) {
			vcpu->arch.mmu.mtsrin(vcpu, i, sregs->u.s.ppc32.sr[i]);
		}
		for (i = 0; i < 8; i++) {
			kvmppc_set_bat(vcpu, &(vcpu3s->ibat[i]), false,
				       (u32)sregs->u.s.ppc32.ibat[i]);
			kvmppc_set_bat(vcpu, &(vcpu3s->ibat[i]), true,
				       (u32)(sregs->u.s.ppc32.ibat[i] >> 32));
			kvmppc_set_bat(vcpu, &(vcpu3s->dbat[i]), false,
				       (u32)sregs->u.s.ppc32.dbat[i]);
			kvmppc_set_bat(vcpu, &(vcpu3s->dbat[i]), true,
				       (u32)(sregs->u.s.ppc32.dbat[i] >> 32));
		}
	}

	/* Flush the MMU after messing with the segments */
	kvmppc_mmu_pte_flush(vcpu, 0, 0);
1243

A
Alexander Graf 已提交
1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272
	return 0;
}

int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
{
	return -ENOTSUPP;
}

int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
{
	return -ENOTSUPP;
}

int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
                                  struct kvm_translation *tr)
{
	return 0;
}

/*
 * Get (and clear) the dirty memory log for a memory slot.
 */
int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
				      struct kvm_dirty_log *log)
{
	struct kvm_memory_slot *memslot;
	struct kvm_vcpu *vcpu;
	ulong ga, ga_end;
	int is_dirty = 0;
1273 1274
	int r;
	unsigned long n;
A
Alexander Graf 已提交
1275

1276
	mutex_lock(&kvm->slots_lock);
A
Alexander Graf 已提交
1277 1278 1279 1280 1281 1282 1283

	r = kvm_get_dirty_log(kvm, log, &is_dirty);
	if (r)
		goto out;

	/* If nothing is dirty, don't bother messing with page tables. */
	if (is_dirty) {
1284
		memslot = &kvm->memslots->memslots[log->slot];
A
Alexander Graf 已提交
1285 1286 1287 1288 1289 1290 1291

		ga = memslot->base_gfn << PAGE_SHIFT;
		ga_end = ga + (memslot->npages << PAGE_SHIFT);

		kvm_for_each_vcpu(n, vcpu, kvm)
			kvmppc_mmu_pte_pflush(vcpu, ga, ga_end);

1292
		n = kvm_dirty_bitmap_bytes(memslot);
A
Alexander Graf 已提交
1293 1294 1295 1296 1297
		memset(memslot->dirty_bitmap, 0, n);
	}

	r = 0;
out:
1298
	mutex_unlock(&kvm->slots_lock);
A
Alexander Graf 已提交
1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310
	return r;
}

int kvmppc_core_check_processor_compat(void)
{
	return 0;
}

struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm *kvm, unsigned int id)
{
	struct kvmppc_vcpu_book3s *vcpu_book3s;
	struct kvm_vcpu *vcpu;
1311
	int err = -ENOMEM;
1312
	unsigned long p;
A
Alexander Graf 已提交
1313

1314
	vcpu_book3s = vzalloc(sizeof(struct kvmppc_vcpu_book3s));
1315
	if (!vcpu_book3s)
A
Alexander Graf 已提交
1316
		goto out;
1317 1318 1319 1320 1321 1322

	vcpu_book3s->shadow_vcpu = (struct kvmppc_book3s_shadow_vcpu *)
		kzalloc(sizeof(*vcpu_book3s->shadow_vcpu), GFP_KERNEL);
	if (!vcpu_book3s->shadow_vcpu)
		goto free_vcpu;

A
Alexander Graf 已提交
1323 1324 1325
	vcpu = &vcpu_book3s->vcpu;
	err = kvm_vcpu_init(vcpu, kvm, id);
	if (err)
1326
		goto free_shadow_vcpu;
A
Alexander Graf 已提交
1327

1328 1329 1330 1331
	p = __get_free_page(GFP_KERNEL|__GFP_ZERO);
	/* the real shared page fills the last 4k of our page */
	vcpu->arch.shared = (void*)(p + PAGE_SIZE - 4096);
	if (!p)
A
Alexander Graf 已提交
1332 1333
		goto uninit_vcpu;

A
Alexander Graf 已提交
1334 1335
	vcpu->arch.host_retip = kvm_return_point;
	vcpu->arch.host_msr = mfmsr();
1336
#ifdef CONFIG_PPC_BOOK3S_64
A
Alexander Graf 已提交
1337 1338
	/* default to book3s_64 (970fx) */
	vcpu->arch.pvr = 0x3C0301;
1339 1340 1341 1342
#else
	/* default to book3s_32 (750) */
	vcpu->arch.pvr = 0x84202;
#endif
A
Alexander Graf 已提交
1343
	kvmppc_set_pvr(vcpu, vcpu->arch.pvr);
1344
	vcpu->arch.slb_nr = 64;
A
Alexander Graf 已提交
1345 1346

	/* remember where some real-mode handlers are */
1347 1348
	vcpu->arch.trampoline_lowmem = __pa(kvmppc_handler_lowmem_trampoline);
	vcpu->arch.trampoline_enter = __pa(kvmppc_handler_trampoline_enter);
A
Alexander Graf 已提交
1349
	vcpu->arch.highmem_handler = (ulong)kvmppc_handler_highmem;
1350
#ifdef CONFIG_PPC_BOOK3S_64
1351
	vcpu->arch.rmcall = *(ulong*)kvmppc_rmcall;
1352 1353 1354
#else
	vcpu->arch.rmcall = (ulong)kvmppc_rmcall;
#endif
A
Alexander Graf 已提交
1355 1356 1357

	vcpu->arch.shadow_msr = MSR_USER64;

A
Alexander Graf 已提交
1358
	err = kvmppc_mmu_init(vcpu);
A
Alexander Graf 已提交
1359
	if (err < 0)
A
Alexander Graf 已提交
1360
		goto uninit_vcpu;
A
Alexander Graf 已提交
1361 1362 1363

	return vcpu;

A
Alexander Graf 已提交
1364 1365
uninit_vcpu:
	kvm_vcpu_uninit(vcpu);
1366 1367
free_shadow_vcpu:
	kfree(vcpu_book3s->shadow_vcpu);
A
Alexander Graf 已提交
1368
free_vcpu:
1369
	vfree(vcpu_book3s);
A
Alexander Graf 已提交
1370 1371 1372 1373 1374 1375 1376 1377
out:
	return ERR_PTR(err);
}

void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu)
{
	struct kvmppc_vcpu_book3s *vcpu_book3s = to_book3s(vcpu);

1378
	free_page((unsigned long)vcpu->arch.shared & PAGE_MASK);
A
Alexander Graf 已提交
1379
	kvm_vcpu_uninit(vcpu);
1380
	kfree(vcpu_book3s->shadow_vcpu);
1381
	vfree(vcpu_book3s);
A
Alexander Graf 已提交
1382 1383 1384 1385 1386 1387
}

extern int __kvmppc_vcpu_entry(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu);
int __kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
{
	int ret;
1388 1389 1390
	double fpr[32][TS_FPRWIDTH];
	unsigned int fpscr;
	int fpexc_mode;
1391
#ifdef CONFIG_ALTIVEC
1392 1393 1394 1395
	vector128 vr[32];
	vector128 vscr;
	unsigned long uninitialized_var(vrsave);
	int used_vr;
1396 1397
#endif
#ifdef CONFIG_VSX
1398
	int used_vsr;
1399
#endif
1400
	ulong ext_msr;
A
Alexander Graf 已提交
1401 1402 1403 1404 1405 1406 1407

	/* No need to go into the guest when all we do is going out */
	if (signal_pending(current)) {
		kvm_run->exit_reason = KVM_EXIT_INTR;
		return -EINTR;
	}

1408 1409 1410
	/* Save FPU state in stack */
	if (current->thread.regs->msr & MSR_FP)
		giveup_fpu(current);
1411 1412 1413
	memcpy(fpr, current->thread.fpr, sizeof(current->thread.fpr));
	fpscr = current->thread.fpscr.val;
	fpexc_mode = current->thread.fpexc_mode;
1414 1415 1416

#ifdef CONFIG_ALTIVEC
	/* Save Altivec state in stack */
1417 1418
	used_vr = current->thread.used_vr;
	if (used_vr) {
1419 1420
		if (current->thread.regs->msr & MSR_VEC)
			giveup_altivec(current);
1421 1422 1423
		memcpy(vr, current->thread.vr, sizeof(current->thread.vr));
		vscr = current->thread.vscr;
		vrsave = current->thread.vrsave;
1424 1425 1426 1427 1428
	}
#endif

#ifdef CONFIG_VSX
	/* Save VSX state in stack */
1429 1430
	used_vsr = current->thread.used_vsr;
	if (used_vsr && (current->thread.regs->msr & MSR_VSX))
1431 1432 1433 1434 1435 1436
			__giveup_vsx(current);
#endif

	/* Remember the MSR with disabled extensions */
	ext_msr = current->thread.regs->msr;

A
Alexander Graf 已提交
1437 1438 1439
	/* XXX we get called with irq disabled - change that! */
	local_irq_enable();

1440
	/* Preload FPU if it's enabled */
1441
	if (vcpu->arch.shared->msr & MSR_FP)
1442 1443
		kvmppc_handle_ext(vcpu, BOOK3S_INTERRUPT_FP_UNAVAIL, MSR_FP);

A
Alexander Graf 已提交
1444 1445 1446 1447
	ret = __kvmppc_vcpu_entry(kvm_run, vcpu);

	local_irq_disable();

1448 1449 1450 1451 1452 1453 1454 1455
	current->thread.regs->msr = ext_msr;

	/* Make sure we save the guest FPU/Altivec/VSX state */
	kvmppc_giveup_ext(vcpu, MSR_FP);
	kvmppc_giveup_ext(vcpu, MSR_VEC);
	kvmppc_giveup_ext(vcpu, MSR_VSX);

	/* Restore FPU state from stack */
1456 1457 1458
	memcpy(current->thread.fpr, fpr, sizeof(current->thread.fpr));
	current->thread.fpscr.val = fpscr;
	current->thread.fpexc_mode = fpexc_mode;
1459 1460 1461

#ifdef CONFIG_ALTIVEC
	/* Restore Altivec state from stack */
1462 1463 1464 1465
	if (used_vr && current->thread.used_vr) {
		memcpy(current->thread.vr, vr, sizeof(current->thread.vr));
		current->thread.vscr = vscr;
		current->thread.vrsave = vrsave;
1466
	}
1467
	current->thread.used_vr = used_vr;
1468 1469 1470
#endif

#ifdef CONFIG_VSX
1471
	current->thread.used_vsr = used_vsr;
1472 1473
#endif

A
Alexander Graf 已提交
1474 1475 1476 1477 1478
	return ret;
}

static int kvmppc_book3s_init(void)
{
1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489
	int r;

	r = kvm_init(NULL, sizeof(struct kvmppc_vcpu_book3s), 0,
		     THIS_MODULE);

	if (r)
		return r;

	r = kvmppc_mmu_hpte_sysinit();

	return r;
A
Alexander Graf 已提交
1490 1491 1492 1493
}

static void kvmppc_book3s_exit(void)
{
1494
	kvmppc_mmu_hpte_sysexit();
A
Alexander Graf 已提交
1495 1496 1497 1498 1499
	kvm_exit();
}

module_init(kvmppc_book3s_init);
module_exit(kvmppc_book3s_exit);