book3s.c 37.5 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 "trace.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 <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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#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_WE|MSR_POW)) {
		if (!vcpu->arch.pending_exceptions) {
			kvm_vcpu_block(vcpu);
			vcpu->stat.halt_wakeup++;
		}
	}

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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;
	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)
{
	return test_bit(BOOK3S_INTERRUPT_DECREMENTER >> 7, &vcpu->arch.pending_exceptions);
}

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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)
{
	kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_EXTERNAL);
}

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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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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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		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;
}

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) &&
		    (priority != BOOK3S_IRQPRIO_DECREMENTER)) {
			/* DEC interrupts get cleared by mtdec */
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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)
{
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	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;
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		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();
}

530 531
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++;

537
	if (kvmppc_xlate(vcpu, *eaddr, data, &pte))
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		return -ENOENT;
539 540

	*eaddr = pte.raddr;
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542 543
	if (!pte.may_write)
		return -EPERM;
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544

A
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	if (kvm_write_guest(vcpu->kvm, pte.raddr, ptr, size))
		return EMULATE_DO_MMIO;
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548
	return EMULATE_DONE;
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}

551
int kvmppc_ld(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
A
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552 553 554
		      bool data)
{
	struct kvmppc_pte pte;
555
	hva_t hva = *eaddr;
A
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	vcpu->stat.ld++;

559 560 561 562
	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))
566
		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);
570
		goto mmio;
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	}

573
	return EMULATE_DONE;
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575
nopte:
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	return -ENOENT;
577 578
mmio:
	return EMULATE_DO_MMIO;
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}

static int kvmppc_visible_gfn(struct kvm_vcpu *vcpu, gfn_t gfn)
{
583 584 585 586 587 588 589
	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;
602 603
	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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606
	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;
618 619
	}

620
	switch (vcpu->arch.shared->msr & (MSR_DR|MSR_IR)) {
621
	case 0:
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		pte.vpage |= ((u64)VSID_REAL << (SID_SHIFT - 12));
623 624 625
		break;
	case MSR_DR:
	case MSR_IR:
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		vcpu->arch.mmu.esid_to_vsid(vcpu, eaddr >> SID_SHIFT, &vsid);

628
		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;
636
		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 */
651
		vcpu->arch.shared->dar = kvmppc_get_fault_dar(vcpu);
652
		vcpu->arch.shared->dsisr = to_svcpu(vcpu)->fault_dsisr;
653 654
		vcpu->arch.shared->msr |=
			(to_svcpu(vcpu)->shadow_srr1 & 0x00000000f8000000ULL);
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655 656 657
		kvmppc_book3s_queue_irqprio(vcpu, vec);
	} else if (page_found == -EPERM) {
		/* Storage protection */
658
		vcpu->arch.shared->dar = kvmppc_get_fault_dar(vcpu);
659 660 661
		vcpu->arch.shared->dsisr =
			to_svcpu(vcpu)->fault_dsisr & ~DSISR_NOHPTE;
		vcpu->arch.shared->dsisr |= DSISR_PROTFAULT;
662 663
		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 */
667
		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;
}

690 691 692 693 694 695 696 697 698
static inline int get_fpr_index(int i)
{
#ifdef CONFIG_VSX
	i *= 2;
#endif
	return i;
}

/* Give up external provider (FPU, Altivec, VSX) */
699
void kvmppc_giveup_ext(struct kvm_vcpu *vcpu, ulong msr)
700 701 702
{
	struct thread_struct *t = &current->thread;
	u64 *vcpu_fpr = vcpu->arch.fpr;
703
#ifdef CONFIG_VSX
704
	u64 *vcpu_vsx = vcpu->arch.vsr;
705
#endif
706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743
	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;
744
	kvmppc_recalc_shadow_msr(vcpu);
745 746
}

747
static int kvmppc_read_inst(struct kvm_vcpu *vcpu)
748
{
749 750
	ulong srr0 = kvmppc_get_pc(vcpu);
	u32 last_inst = kvmppc_get_last_inst(vcpu);
751 752
	int ret;

753
	ret = kvmppc_ld(vcpu, &srr0, sizeof(u32), &last_inst, false);
754
	if (ret == -ENOENT) {
755 756 757 758 759
		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);
760
		kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_INST_STORAGE);
761 762 763 764 765 766 767 768 769 770 771 772 773 774 775
		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)
776 777 778 779 780 781
		/* Need to emulate */
		return EMULATE_FAIL;

	return EMULATE_AGAIN;
}

782 783 784 785 786 787
/* 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;
788
#ifdef CONFIG_VSX
789
	u64 *vcpu_vsx = vcpu->arch.vsr;
790
#endif
791 792 793
	u64 *thread_fpr = (u64*)t->fpr;
	int i;

794 795 796 797
	/* When we have paired singles, we emulate in software */
	if (vcpu->arch.hflags & BOOK3S_HFLAG_PAIRED_SINGLE)
		return RESUME_GUEST;

798
	if (!(vcpu->arch.shared->msr & msr)) {
799 800 801 802
		kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
		return RESUME_GUEST;
	}

803 804 805 806 807
	/* We already own the ext */
	if (vcpu->arch.guest_owned_ext & msr) {
		return RESUME_GUEST;
	}

808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843
#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;

844
	kvmppc_recalc_shadow_msr(vcpu);
845 846 847 848

	return RESUME_GUEST;
}

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Alexander Graf 已提交
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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;
858 859

	trace_kvm_book3s_exit(exit_nr, vcpu);
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860 861 862 863
	kvm_resched(vcpu);
	switch (exit_nr) {
	case BOOK3S_INTERRUPT_INST_STORAGE:
		vcpu->stat.pf_instruc++;
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Alexander Graf 已提交
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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
876
		/* only care about PTEG not found errors, but leave NX alone */
877 878
		if (to_svcpu(vcpu)->shadow_srr1 & 0x40000000) {
			r = kvmppc_handle_pagefault(run, vcpu, kvmppc_get_pc(vcpu), exit_nr);
A
Alexander Graf 已提交
879 880 881 882 883 884 885 886
			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
887
			kvmppc_mmu_pte_flush(vcpu, kvmppc_get_pc(vcpu), ~0xFFFUL);
A
Alexander Graf 已提交
888
			r = RESUME_GUEST;
A
Alexander Graf 已提交
889
		} else {
890 891
			vcpu->arch.shared->msr |=
				to_svcpu(vcpu)->shadow_srr1 & 0x58000000;
A
Alexander Graf 已提交
892 893 894 895 896
			kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
			r = RESUME_GUEST;
		}
		break;
	case BOOK3S_INTERRUPT_DATA_STORAGE:
897 898
	{
		ulong dar = kvmppc_get_fault_dar(vcpu);
A
Alexander Graf 已提交
899
		vcpu->stat.pf_storage++;
A
Alexander Graf 已提交
900 901 902 903 904 905 906 907 908 909 910

#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
911
		/* The only case we need to handle is missing shadow PTEs */
912 913
		if (to_svcpu(vcpu)->fault_dsisr & DSISR_NOHPTE) {
			r = kvmppc_handle_pagefault(run, vcpu, dar, exit_nr);
A
Alexander Graf 已提交
914
		} else {
915
			vcpu->arch.shared->dar = dar;
916
			vcpu->arch.shared->dsisr = to_svcpu(vcpu)->fault_dsisr;
A
Alexander Graf 已提交
917 918 919 920
			kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
			r = RESUME_GUEST;
		}
		break;
921
	}
A
Alexander Graf 已提交
922
	case BOOK3S_INTERRUPT_DATA_SEGMENT:
923
		if (kvmppc_mmu_map_segment(vcpu, kvmppc_get_fault_dar(vcpu)) < 0) {
924
			vcpu->arch.shared->dar = kvmppc_get_fault_dar(vcpu);
A
Alexander Graf 已提交
925 926 927 928 929 930
			kvmppc_book3s_queue_irqprio(vcpu,
				BOOK3S_INTERRUPT_DATA_SEGMENT);
		}
		r = RESUME_GUEST;
		break;
	case BOOK3S_INTERRUPT_INST_SEGMENT:
931
		if (kvmppc_mmu_map_segment(vcpu, kvmppc_get_pc(vcpu)) < 0) {
A
Alexander Graf 已提交
932 933 934 935 936 937 938 939 940 941 942 943 944 945
			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;
946 947 948
	case BOOK3S_INTERRUPT_PERFMON:
		r = RESUME_GUEST;
		break;
A
Alexander Graf 已提交
949 950 951
	case BOOK3S_INTERRUPT_PROGRAM:
	{
		enum emulation_result er;
952 953
		ulong flags;

954
program_interrupt:
955
		flags = to_svcpu(vcpu)->shadow_srr1 & 0x1f0000ull;
A
Alexander Graf 已提交
956

957
		if (vcpu->arch.shared->msr & MSR_PR) {
A
Alexander Graf 已提交
958
#ifdef EXIT_DEBUG
959
			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
960
#endif
961
			if ((kvmppc_get_last_inst(vcpu) & 0xff0007ff) !=
A
Alexander Graf 已提交
962
			    (INS_DCBZ & 0xfffffff7)) {
963
				kvmppc_core_queue_program(vcpu, flags);
A
Alexander Graf 已提交
964 965 966 967 968 969 970 971 972
				r = RESUME_GUEST;
				break;
			}
		}

		vcpu->stat.emulated_inst_exits++;
		er = kvmppc_emulate_instruction(run, vcpu);
		switch (er) {
		case EMULATE_DONE:
973
			r = RESUME_GUEST_NV;
A
Alexander Graf 已提交
974
			break;
975 976 977
		case EMULATE_AGAIN:
			r = RESUME_GUEST;
			break;
A
Alexander Graf 已提交
978 979
		case EMULATE_FAIL:
			printk(KERN_CRIT "%s: emulation at %lx failed (%08x)\n",
980
			       __func__, kvmppc_get_pc(vcpu), kvmppc_get_last_inst(vcpu));
981
			kvmppc_core_queue_program(vcpu, flags);
A
Alexander Graf 已提交
982 983
			r = RESUME_GUEST;
			break;
984 985 986 987
		case EMULATE_DO_MMIO:
			run->exit_reason = KVM_EXIT_MMIO;
			r = RESUME_HOST_NV;
			break;
A
Alexander Graf 已提交
988 989 990 991 992 993
		default:
			BUG();
		}
		break;
	}
	case BOOK3S_INTERRUPT_SYSCALL:
994 995 996
		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)) {
997
			/* MOL hypercalls */
998 999 1000 1001 1002 1003 1004 1005
			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;
1006 1007 1008 1009 1010
		} 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;
1011
		} else {
1012
			/* Guest syscalls */
1013 1014 1015 1016
			vcpu->stat.syscall_exits++;
			kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
			r = RESUME_GUEST;
		}
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Alexander Graf 已提交
1017 1018 1019 1020
		break;
	case BOOK3S_INTERRUPT_FP_UNAVAIL:
	case BOOK3S_INTERRUPT_ALTIVEC:
	case BOOK3S_INTERRUPT_VSX:
1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042
	{
		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;
		}
1043
		break;
1044
	}
1045 1046
	case BOOK3S_INTERRUPT_ALIGNMENT:
		if (kvmppc_read_inst(vcpu) == EMULATE_DONE) {
1047
			vcpu->arch.shared->dsisr = kvmppc_alignment_dsisr(vcpu,
1048
				kvmppc_get_last_inst(vcpu));
1049
			vcpu->arch.shared->dar = kvmppc_alignment_dar(vcpu,
1050
				kvmppc_get_last_inst(vcpu));
1051 1052 1053 1054
			kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
		}
		r = RESUME_GUEST;
		break;
1055 1056
	case BOOK3S_INTERRUPT_MACHINE_CHECK:
	case BOOK3S_INTERRUPT_TRACE:
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Alexander Graf 已提交
1057 1058 1059 1060 1061
		kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
		r = RESUME_GUEST;
		break;
	default:
		/* Ugh - bork here! What did we get? */
1062
		printk(KERN_EMERG "exit_nr=0x%x | pc=0x%lx | msr=0x%lx\n",
1063
			exit_nr, kvmppc_get_pc(vcpu), to_svcpu(vcpu)->shadow_srr1);
A
Alexander Graf 已提交
1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088
		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);
		}
	}

1089
	trace_kvm_book3s_reenter(r, vcpu);
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Alexander Graf 已提交
1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102

	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;

1103
	regs->pc = kvmppc_get_pc(vcpu);
1104
	regs->cr = kvmppc_get_cr(vcpu);
1105 1106
	regs->ctr = kvmppc_get_ctr(vcpu);
	regs->lr = kvmppc_get_lr(vcpu);
1107
	regs->xer = kvmppc_get_xer(vcpu);
1108
	regs->msr = vcpu->arch.shared->msr;
1109 1110
	regs->srr0 = vcpu->arch.shared->srr0;
	regs->srr1 = vcpu->arch.shared->srr1;
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Alexander Graf 已提交
1111
	regs->pid = vcpu->arch.pid;
1112 1113 1114 1115
	regs->sprg0 = vcpu->arch.shared->sprg0;
	regs->sprg1 = vcpu->arch.shared->sprg1;
	regs->sprg2 = vcpu->arch.shared->sprg2;
	regs->sprg3 = vcpu->arch.shared->sprg3;
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Alexander Graf 已提交
1116 1117 1118 1119 1120
	regs->sprg5 = vcpu->arch.sprg4;
	regs->sprg6 = vcpu->arch.sprg5;
	regs->sprg7 = vcpu->arch.sprg6;

	for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
1121
		regs->gpr[i] = kvmppc_get_gpr(vcpu, i);
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Alexander Graf 已提交
1122 1123 1124 1125 1126 1127 1128 1129

	return 0;
}

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

1130
	kvmppc_set_pc(vcpu, regs->pc);
1131
	kvmppc_set_cr(vcpu, regs->cr);
1132 1133
	kvmppc_set_ctr(vcpu, regs->ctr);
	kvmppc_set_lr(vcpu, regs->lr);
1134
	kvmppc_set_xer(vcpu, regs->xer);
A
Alexander Graf 已提交
1135
	kvmppc_set_msr(vcpu, regs->msr);
1136 1137
	vcpu->arch.shared->srr0 = regs->srr0;
	vcpu->arch.shared->srr1 = regs->srr1;
1138 1139 1140 1141
	vcpu->arch.shared->sprg0 = regs->sprg0;
	vcpu->arch.shared->sprg1 = regs->sprg1;
	vcpu->arch.shared->sprg2 = regs->sprg2;
	vcpu->arch.shared->sprg3 = regs->sprg3;
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Alexander Graf 已提交
1142 1143 1144 1145
	vcpu->arch.sprg5 = regs->sprg4;
	vcpu->arch.sprg6 = regs->sprg5;
	vcpu->arch.sprg7 = regs->sprg6;

1146 1147
	for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
		kvmppc_set_gpr(vcpu, i, regs->gpr[i]);
A
Alexander Graf 已提交
1148 1149 1150 1151 1152 1153 1154

	return 0;
}

int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
                                  struct kvm_sregs *sregs)
{
1155 1156 1157
	struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
	int i;

A
Alexander Graf 已提交
1158
	sregs->pvr = vcpu->arch.pvr;
1159 1160 1161 1162 1163 1164 1165 1166

	sregs->u.s.sdr1 = to_book3s(vcpu)->sdr1;
	if (vcpu->arch.hflags & BOOK3S_HFLAG_SLB) {
		for (i = 0; i < 64; i++) {
			sregs->u.s.ppc64.slb[i].slbe = vcpu3s->slb[i].orige | i;
			sregs->u.s.ppc64.slb[i].slbv = vcpu3s->slb[i].origv;
		}
	} else {
1167 1168 1169
		for (i = 0; i < 16; i++)
			sregs->u.s.ppc32.sr[i] = vcpu->arch.shared->sr[i];

1170 1171 1172 1173 1174
		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;
		}
	}
1175

A
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1176 1177 1178 1179 1180 1181
	return 0;
}

int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
                                  struct kvm_sregs *sregs)
{
1182 1183 1184
	struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
	int i;

A
Alexander Graf 已提交
1185
	kvmppc_set_pvr(vcpu, sregs->pvr);
1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210

	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);
1211

A
Alexander Graf 已提交
1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240
	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;
1241 1242
	int r;
	unsigned long n;
A
Alexander Graf 已提交
1243

1244
	mutex_lock(&kvm->slots_lock);
A
Alexander Graf 已提交
1245 1246 1247 1248 1249 1250 1251

	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) {
1252
		memslot = &kvm->memslots->memslots[log->slot];
A
Alexander Graf 已提交
1253 1254 1255 1256 1257 1258 1259

		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);

1260
		n = kvm_dirty_bitmap_bytes(memslot);
A
Alexander Graf 已提交
1261 1262 1263 1264 1265
		memset(memslot->dirty_bitmap, 0, n);
	}

	r = 0;
out:
1266
	mutex_unlock(&kvm->slots_lock);
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Alexander Graf 已提交
1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278
	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;
1279
	int err = -ENOMEM;
1280
	unsigned long p;
A
Alexander Graf 已提交
1281

1282
	vcpu_book3s = vmalloc(sizeof(struct kvmppc_vcpu_book3s));
1283
	if (!vcpu_book3s)
A
Alexander Graf 已提交
1284
		goto out;
1285

A
Alexander Graf 已提交
1286
	memset(vcpu_book3s, 0, sizeof(struct kvmppc_vcpu_book3s));
A
Alexander Graf 已提交
1287

1288 1289 1290 1291 1292
	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
1293 1294 1295
	vcpu = &vcpu_book3s->vcpu;
	err = kvm_vcpu_init(vcpu, kvm, id);
	if (err)
1296
		goto free_shadow_vcpu;
A
Alexander Graf 已提交
1297

1298 1299 1300 1301
	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
1302 1303
		goto uninit_vcpu;

A
Alexander Graf 已提交
1304 1305
	vcpu->arch.host_retip = kvm_return_point;
	vcpu->arch.host_msr = mfmsr();
1306
#ifdef CONFIG_PPC_BOOK3S_64
A
Alexander Graf 已提交
1307 1308
	/* default to book3s_64 (970fx) */
	vcpu->arch.pvr = 0x3C0301;
1309 1310 1311 1312
#else
	/* default to book3s_32 (750) */
	vcpu->arch.pvr = 0x84202;
#endif
A
Alexander Graf 已提交
1313 1314 1315 1316 1317 1318 1319
	kvmppc_set_pvr(vcpu, vcpu->arch.pvr);
	vcpu_book3s->slb_nr = 64;

	/* remember where some real-mode handlers are */
	vcpu->arch.trampoline_lowmem = kvmppc_trampoline_lowmem;
	vcpu->arch.trampoline_enter = kvmppc_trampoline_enter;
	vcpu->arch.highmem_handler = (ulong)kvmppc_handler_highmem;
1320
#ifdef CONFIG_PPC_BOOK3S_64
1321
	vcpu->arch.rmcall = *(ulong*)kvmppc_rmcall;
1322 1323 1324
#else
	vcpu->arch.rmcall = (ulong)kvmppc_rmcall;
#endif
A
Alexander Graf 已提交
1325 1326 1327

	vcpu->arch.shadow_msr = MSR_USER64;

A
Alexander Graf 已提交
1328
	err = kvmppc_mmu_init(vcpu);
A
Alexander Graf 已提交
1329
	if (err < 0)
A
Alexander Graf 已提交
1330
		goto uninit_vcpu;
A
Alexander Graf 已提交
1331 1332 1333

	return vcpu;

A
Alexander Graf 已提交
1334 1335
uninit_vcpu:
	kvm_vcpu_uninit(vcpu);
1336 1337
free_shadow_vcpu:
	kfree(vcpu_book3s->shadow_vcpu);
A
Alexander Graf 已提交
1338
free_vcpu:
1339
	vfree(vcpu_book3s);
A
Alexander Graf 已提交
1340 1341 1342 1343 1344 1345 1346 1347
out:
	return ERR_PTR(err);
}

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

1348
	free_page((unsigned long)vcpu->arch.shared & PAGE_MASK);
A
Alexander Graf 已提交
1349
	kvm_vcpu_uninit(vcpu);
1350
	kfree(vcpu_book3s->shadow_vcpu);
1351
	vfree(vcpu_book3s);
A
Alexander Graf 已提交
1352 1353 1354 1355 1356 1357
}

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;
1358 1359 1360
	double fpr[32][TS_FPRWIDTH];
	unsigned int fpscr;
	int fpexc_mode;
1361
#ifdef CONFIG_ALTIVEC
1362 1363 1364 1365
	vector128 vr[32];
	vector128 vscr;
	unsigned long uninitialized_var(vrsave);
	int used_vr;
1366 1367
#endif
#ifdef CONFIG_VSX
1368
	int used_vsr;
1369
#endif
1370
	ulong ext_msr;
A
Alexander Graf 已提交
1371 1372 1373 1374 1375 1376 1377

	/* 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;
	}

1378 1379 1380
	/* Save FPU state in stack */
	if (current->thread.regs->msr & MSR_FP)
		giveup_fpu(current);
1381 1382 1383
	memcpy(fpr, current->thread.fpr, sizeof(current->thread.fpr));
	fpscr = current->thread.fpscr.val;
	fpexc_mode = current->thread.fpexc_mode;
1384 1385 1386

#ifdef CONFIG_ALTIVEC
	/* Save Altivec state in stack */
1387 1388
	used_vr = current->thread.used_vr;
	if (used_vr) {
1389 1390
		if (current->thread.regs->msr & MSR_VEC)
			giveup_altivec(current);
1391 1392 1393
		memcpy(vr, current->thread.vr, sizeof(current->thread.vr));
		vscr = current->thread.vscr;
		vrsave = current->thread.vrsave;
1394 1395 1396 1397 1398
	}
#endif

#ifdef CONFIG_VSX
	/* Save VSX state in stack */
1399 1400
	used_vsr = current->thread.used_vsr;
	if (used_vsr && (current->thread.regs->msr & MSR_VSX))
1401 1402 1403 1404 1405 1406
			__giveup_vsx(current);
#endif

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

A
Alexander Graf 已提交
1407 1408 1409
	/* XXX we get called with irq disabled - change that! */
	local_irq_enable();

1410
	/* Preload FPU if it's enabled */
1411
	if (vcpu->arch.shared->msr & MSR_FP)
1412 1413
		kvmppc_handle_ext(vcpu, BOOK3S_INTERRUPT_FP_UNAVAIL, MSR_FP);

A
Alexander Graf 已提交
1414 1415 1416 1417
	ret = __kvmppc_vcpu_entry(kvm_run, vcpu);

	local_irq_disable();

1418 1419 1420 1421 1422 1423 1424 1425
	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 */
1426 1427 1428
	memcpy(current->thread.fpr, fpr, sizeof(current->thread.fpr));
	current->thread.fpscr.val = fpscr;
	current->thread.fpexc_mode = fpexc_mode;
1429 1430 1431

#ifdef CONFIG_ALTIVEC
	/* Restore Altivec state from stack */
1432 1433 1434 1435
	if (used_vr && current->thread.used_vr) {
		memcpy(current->thread.vr, vr, sizeof(current->thread.vr));
		current->thread.vscr = vscr;
		current->thread.vrsave = vrsave;
1436
	}
1437
	current->thread.used_vr = used_vr;
1438 1439 1440
#endif

#ifdef CONFIG_VSX
1441
	current->thread.used_vsr = used_vsr;
1442 1443
#endif

A
Alexander Graf 已提交
1444 1445 1446 1447 1448
	return ret;
}

static int kvmppc_book3s_init(void)
{
1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459
	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
1460 1461 1462 1463
}

static void kvmppc_book3s_exit(void)
{
1464
	kvmppc_mmu_hpte_sysexit();
A
Alexander Graf 已提交
1465 1466 1467 1468 1469
	kvm_exit();
}

module_init(kvmppc_book3s_init);
module_exit(kvmppc_book3s_exit);