book3s.c 25.9 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/export.h>
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#include <linux/slab.h>
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#include <linux/module.h>
#include <linux/miscdevice.h>
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#include <linux/gfp.h>
#include <linux/sched.h>
#include <linux/vmalloc.h>
#include <linux/highmem.h>
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#include <asm/reg.h>
#include <asm/cputable.h>
#include <asm/cacheflush.h>
#include <asm/tlbflush.h>
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#include <linux/uaccess.h>
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#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 <asm/xive.h>
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#include "book3s.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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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) },
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	{ "halt_poll_success_ns",	VCPU_STAT(halt_poll_success_ns) },
	{ "halt_poll_fail_ns",		VCPU_STAT(halt_poll_fail_ns) },
	{ "halt_wait_ns",		VCPU_STAT(halt_wait_ns) },
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	{ "halt_successful_poll", VCPU_STAT(halt_successful_poll), },
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	{ "halt_attempted_poll", VCPU_STAT(halt_attempted_poll), },
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	{ "halt_successful_wait",	VCPU_STAT(halt_successful_wait) },
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	{ "halt_poll_invalid", VCPU_STAT(halt_poll_invalid) },
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	{ "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) },
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	{ "pthru_all",       VCPU_STAT(pthru_all) },
	{ "pthru_host",      VCPU_STAT(pthru_host) },
	{ "pthru_bad_aff",   VCPU_STAT(pthru_bad_aff) },
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	{ NULL }
};

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void kvmppc_unfixup_split_real(struct kvm_vcpu *vcpu)
{
	if (vcpu->arch.hflags & BOOK3S_HFLAG_SPLIT_HACK) {
		ulong pc = kvmppc_get_pc(vcpu);
		if ((pc & SPLIT_HACK_MASK) == SPLIT_HACK_OFFS)
			kvmppc_set_pc(vcpu, pc & ~SPLIT_HACK_MASK);
		vcpu->arch.hflags &= ~BOOK3S_HFLAG_SPLIT_HACK;
	}
}
EXPORT_SYMBOL_GPL(kvmppc_unfixup_split_real);

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static inline unsigned long kvmppc_interrupt_offset(struct kvm_vcpu *vcpu)
{
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	if (!is_kvmppc_hv_enabled(vcpu->kvm))
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		return to_book3s(vcpu)->hior;
	return 0;
}

static inline void kvmppc_update_int_pending(struct kvm_vcpu *vcpu,
			unsigned long pending_now, unsigned long old_pending)
{
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	if (is_kvmppc_hv_enabled(vcpu->kvm))
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		return;
	if (pending_now)
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		kvmppc_set_int_pending(vcpu, 1);
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	else if (old_pending)
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		kvmppc_set_int_pending(vcpu, 0);
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}

static inline bool kvmppc_critical_section(struct kvm_vcpu *vcpu)
{
	ulong crit_raw;
	ulong crit_r1;
	bool crit;

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	if (is_kvmppc_hv_enabled(vcpu->kvm))
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		return false;

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	crit_raw = kvmppc_get_critical(vcpu);
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	crit_r1 = kvmppc_get_gpr(vcpu, 1);

	/* Truncate crit indicators in 32 bit mode */
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	if (!(kvmppc_get_msr(vcpu) & MSR_SF)) {
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		crit_raw &= 0xffffffff;
		crit_r1 &= 0xffffffff;
	}

	/* Critical section when crit == r1 */
	crit = (crit_raw == crit_r1);
	/* ... and we're in supervisor mode */
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	crit = crit && !(kvmppc_get_msr(vcpu) & MSR_PR);
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	return crit;
}

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void kvmppc_inject_interrupt(struct kvm_vcpu *vcpu, int vec, u64 flags)
{
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	kvmppc_unfixup_split_real(vcpu);
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	kvmppc_set_srr0(vcpu, kvmppc_get_pc(vcpu));
	kvmppc_set_srr1(vcpu, kvmppc_get_msr(vcpu) | flags);
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	kvmppc_set_pc(vcpu, kvmppc_interrupt_offset(vcpu) + 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;
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	case 0xf60: prio = BOOK3S_IRQPRIO_FAC_UNAVAIL;		break;
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	default:    prio = BOOK3S_IRQPRIO_MAX;			break;
	}

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	return prio;
}

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void kvmppc_book3s_dequeue_irqprio(struct kvm_vcpu *vcpu,
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					  unsigned int vec)
{
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	unsigned long old_pending = vcpu->arch.pending_exceptions;

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	clear_bit(kvmppc_book3s_vec2irqprio(vec),
		  &vcpu->arch.pending_exceptions);
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	kvmppc_update_int_pending(vcpu, vcpu->arch.pending_exceptions,
				  old_pending);
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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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EXPORT_SYMBOL_GPL(kvmppc_book3s_queue_irqprio);
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void kvmppc_core_queue_program(struct kvm_vcpu *vcpu, ulong flags)
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{
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	/* might as well deliver this straight away */
	kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_PROGRAM, flags);
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}
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EXPORT_SYMBOL_GPL(kvmppc_core_queue_program);
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void kvmppc_core_queue_fpunavail(struct kvm_vcpu *vcpu)
{
	/* might as well deliver this straight away */
	kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_FP_UNAVAIL, 0);
}

void kvmppc_core_queue_vec_unavail(struct kvm_vcpu *vcpu)
{
	/* might as well deliver this straight away */
	kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_ALTIVEC, 0);
}

void kvmppc_core_queue_vsx_unavail(struct kvm_vcpu *vcpu)
{
	/* might as well deliver this straight away */
	kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_VSX, 0);
}

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void kvmppc_core_queue_dec(struct kvm_vcpu *vcpu)
{
	kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_DECREMENTER);
}
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EXPORT_SYMBOL_GPL(kvmppc_core_queue_dec);
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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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EXPORT_SYMBOL_GPL(kvmppc_core_pending_dec);
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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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EXPORT_SYMBOL_GPL(kvmppc_core_dequeue_dec);
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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)
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{
	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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void kvmppc_core_queue_data_storage(struct kvm_vcpu *vcpu, ulong dar,
				    ulong flags)
{
	kvmppc_set_dar(vcpu, dar);
	kvmppc_set_dsisr(vcpu, flags);
	kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_DATA_STORAGE);
}
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EXPORT_SYMBOL_GPL(kvmppc_core_queue_data_storage);	/* used by kvm_hv */
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void kvmppc_core_queue_inst_storage(struct kvm_vcpu *vcpu, ulong flags)
{
	u64 msr = kvmppc_get_msr(vcpu);
	msr &= ~(SRR1_ISI_NOPT | SRR1_ISI_N_OR_G | SRR1_ISI_PROT);
	msr |= flags & (SRR1_ISI_NOPT | SRR1_ISI_N_OR_G | SRR1_ISI_PROT);
	kvmppc_set_msr_fast(vcpu, msr);
	kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_INST_STORAGE);
}

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static int kvmppc_book3s_irqprio_deliver(struct kvm_vcpu *vcpu,
					 unsigned int priority)
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{
	int deliver = 1;
	int vec = 0;
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	bool crit = kvmppc_critical_section(vcpu);
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	switch (priority) {
	case BOOK3S_IRQPRIO_DECREMENTER:
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		deliver = (kvmppc_get_msr(vcpu) & 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 = (kvmppc_get_msr(vcpu) & 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;
		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;
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	case BOOK3S_IRQPRIO_FAC_UNAVAIL:
		vec = BOOK3S_INTERRUPT_FAC_UNAVAIL;
		break;
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	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, 0);
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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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int kvmppc_core_prepare_to_enter(struct kvm_vcpu *vcpu)
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{
	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 */
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	kvmppc_update_int_pending(vcpu, *pending, old_pending);
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	return 0;
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}
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EXPORT_SYMBOL_GPL(kvmppc_core_prepare_to_enter);
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kvm_pfn_t kvmppc_gpa_to_pfn(struct kvm_vcpu *vcpu, gpa_t gpa, bool writing,
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			bool *writable)
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{
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	ulong mp_pa = vcpu->arch.magic_page_pa & KVM_PAM;
	gfn_t gfn = gpa >> PAGE_SHIFT;
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	if (!(kvmppc_get_msr(vcpu) & MSR_SF))
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		mp_pa = (uint32_t)mp_pa;

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	/* Magic page override */
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	gpa &= ~0xFFFULL;
	if (unlikely(mp_pa) && unlikely((gpa & KVM_PAM) == mp_pa)) {
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		ulong shared_page = ((ulong)vcpu->arch.shared) & PAGE_MASK;
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		kvm_pfn_t pfn;
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		pfn = (kvm_pfn_t)virt_to_phys((void*)shared_page) >> PAGE_SHIFT;
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		get_page(pfn_to_page(pfn));
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		if (writable)
			*writable = true;
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		return pfn;
	}

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	return gfn_to_pfn_prot(vcpu->kvm, gfn, writing, writable);
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}
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EXPORT_SYMBOL_GPL(kvmppc_gpa_to_pfn);
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int kvmppc_xlate(struct kvm_vcpu *vcpu, ulong eaddr, enum xlate_instdata xlid,
		 enum xlate_readwrite xlrw, struct kvmppc_pte *pte)
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{
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	bool data = (xlid == XLATE_DATA);
	bool iswrite = (xlrw == XLATE_WRITE);
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	int relocated = (kvmppc_get_msr(vcpu) & (data ? MSR_DR : MSR_IR));
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	int r;

	if (relocated) {
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		r = vcpu->arch.mmu.xlate(vcpu, eaddr, pte, data, iswrite);
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	} 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;
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		if ((kvmppc_get_msr(vcpu) & (MSR_IR | MSR_DR)) == MSR_DR &&
		    !data) {
			if ((vcpu->arch.hflags & BOOK3S_HFLAG_SPLIT_HACK) &&
			    ((eaddr & SPLIT_HACK_MASK) == SPLIT_HACK_OFFS))
			pte->raddr &= ~SPLIT_HACK_MASK;
		}
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	}

	return r;
}

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int kvmppc_load_last_inst(struct kvm_vcpu *vcpu, enum instruction_type type,
					 u32 *inst)
{
	ulong pc = kvmppc_get_pc(vcpu);
	int r;

	if (type == INST_SC)
		pc -= 4;

	r = kvmppc_ld(vcpu, &pc, sizeof(u32), inst, false);
	if (r == EMULATE_DONE)
		return r;
	else
		return EMULATE_AGAIN;
}
EXPORT_SYMBOL_GPL(kvmppc_load_last_inst);

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

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

void kvmppc_subarch_vcpu_uninit(struct kvm_vcpu *vcpu)
{
}

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int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
				  struct kvm_sregs *sregs)
{
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	return vcpu->kvm->arch.kvm_ops->get_sregs(vcpu, sregs);
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}

int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
				  struct kvm_sregs *sregs)
{
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	return vcpu->kvm->arch.kvm_ops->set_sregs(vcpu, sregs);
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}

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

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	vcpu_load(vcpu);

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	regs->pc = kvmppc_get_pc(vcpu);
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	regs->cr = kvmppc_get_cr(vcpu);
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	regs->ctr = kvmppc_get_ctr(vcpu);
	regs->lr = kvmppc_get_lr(vcpu);
506
	regs->xer = kvmppc_get_xer(vcpu);
507 508 509
	regs->msr = kvmppc_get_msr(vcpu);
	regs->srr0 = kvmppc_get_srr0(vcpu);
	regs->srr1 = kvmppc_get_srr1(vcpu);
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510
	regs->pid = vcpu->arch.pid;
511 512 513 514 515 516 517 518
	regs->sprg0 = kvmppc_get_sprg0(vcpu);
	regs->sprg1 = kvmppc_get_sprg1(vcpu);
	regs->sprg2 = kvmppc_get_sprg2(vcpu);
	regs->sprg3 = kvmppc_get_sprg3(vcpu);
	regs->sprg4 = kvmppc_get_sprg4(vcpu);
	regs->sprg5 = kvmppc_get_sprg5(vcpu);
	regs->sprg6 = kvmppc_get_sprg6(vcpu);
	regs->sprg7 = kvmppc_get_sprg7(vcpu);
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Alexander Graf 已提交
519 520

	for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
521
		regs->gpr[i] = kvmppc_get_gpr(vcpu, i);
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522

523
	vcpu_put(vcpu);
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524 525 526 527 528 529 530
	return 0;
}

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

531 532
	vcpu_load(vcpu);

533
	kvmppc_set_pc(vcpu, regs->pc);
534
	kvmppc_set_cr(vcpu, regs->cr);
535 536
	kvmppc_set_ctr(vcpu, regs->ctr);
	kvmppc_set_lr(vcpu, regs->lr);
537
	kvmppc_set_xer(vcpu, regs->xer);
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Alexander Graf 已提交
538
	kvmppc_set_msr(vcpu, regs->msr);
539 540 541 542 543 544 545 546 547 548
	kvmppc_set_srr0(vcpu, regs->srr0);
	kvmppc_set_srr1(vcpu, regs->srr1);
	kvmppc_set_sprg0(vcpu, regs->sprg0);
	kvmppc_set_sprg1(vcpu, regs->sprg1);
	kvmppc_set_sprg2(vcpu, regs->sprg2);
	kvmppc_set_sprg3(vcpu, regs->sprg3);
	kvmppc_set_sprg4(vcpu, regs->sprg4);
	kvmppc_set_sprg5(vcpu, regs->sprg5);
	kvmppc_set_sprg6(vcpu, regs->sprg6);
	kvmppc_set_sprg7(vcpu, regs->sprg7);
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Alexander Graf 已提交
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550 551
	for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
		kvmppc_set_gpr(vcpu, i, regs->gpr[i]);
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552

553
	vcpu_put(vcpu);
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	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;
}

567 568
int kvmppc_get_one_reg(struct kvm_vcpu *vcpu, u64 id,
			union kvmppc_one_reg *val)
569
{
570
	int r = 0;
571
	long int i;
572

573
	r = vcpu->kvm->arch.kvm_ops->get_one_reg(vcpu, id, val);
574 575
	if (r == -EINVAL) {
		r = 0;
576
		switch (id) {
577
		case KVM_REG_PPC_DAR:
578
			*val = get_reg_val(id, kvmppc_get_dar(vcpu));
579 580
			break;
		case KVM_REG_PPC_DSISR:
581
			*val = get_reg_val(id, kvmppc_get_dsisr(vcpu));
582
			break;
583
		case KVM_REG_PPC_FPR0 ... KVM_REG_PPC_FPR31:
584 585
			i = id - KVM_REG_PPC_FPR0;
			*val = get_reg_val(id, VCPU_FPR(vcpu, i));
586 587
			break;
		case KVM_REG_PPC_FPSCR:
588
			*val = get_reg_val(id, vcpu->arch.fp.fpscr);
589
			break;
590 591 592
#ifdef CONFIG_VSX
		case KVM_REG_PPC_VSR0 ... KVM_REG_PPC_VSR31:
			if (cpu_has_feature(CPU_FTR_VSX)) {
593 594 595
				i = id - KVM_REG_PPC_VSR0;
				val->vsxval[0] = vcpu->arch.fp.fpr[i][0];
				val->vsxval[1] = vcpu->arch.fp.fpr[i][1];
596 597 598 599 600
			} else {
				r = -ENXIO;
			}
			break;
#endif /* CONFIG_VSX */
601 602
		case KVM_REG_PPC_DEBUG_INST:
			*val = get_reg_val(id, INS_TW);
603
			break;
604 605
#ifdef CONFIG_KVM_XICS
		case KVM_REG_PPC_ICP_STATE:
606
			if (!vcpu->arch.icp && !vcpu->arch.xive_vcpu) {
607 608 609
				r = -ENXIO;
				break;
			}
610 611 612 613
			if (xive_enabled())
				*val = get_reg_val(id, kvmppc_xive_get_icp(vcpu));
			else
				*val = get_reg_val(id, kvmppc_xics_get_icp(vcpu));
614 615
			break;
#endif /* CONFIG_KVM_XICS */
616
		case KVM_REG_PPC_FSCR:
617
			*val = get_reg_val(id, vcpu->arch.fscr);
618
			break;
619
		case KVM_REG_PPC_TAR:
620
			*val = get_reg_val(id, vcpu->arch.tar);
621
			break;
622
		case KVM_REG_PPC_EBBHR:
623
			*val = get_reg_val(id, vcpu->arch.ebbhr);
624 625
			break;
		case KVM_REG_PPC_EBBRR:
626
			*val = get_reg_val(id, vcpu->arch.ebbrr);
627 628
			break;
		case KVM_REG_PPC_BESCR:
629
			*val = get_reg_val(id, vcpu->arch.bescr);
630
			break;
631
		case KVM_REG_PPC_IC:
632
			*val = get_reg_val(id, vcpu->arch.ic);
633
			break;
634 635 636 637 638 639 640 641 642
		default:
			r = -EINVAL;
			break;
		}
	}

	return r;
}

643 644
int kvmppc_set_one_reg(struct kvm_vcpu *vcpu, u64 id,
			union kvmppc_one_reg *val)
645
{
646
	int r = 0;
647
	long int i;
648

649
	r = vcpu->kvm->arch.kvm_ops->set_one_reg(vcpu, id, val);
650 651
	if (r == -EINVAL) {
		r = 0;
652
		switch (id) {
653
		case KVM_REG_PPC_DAR:
654
			kvmppc_set_dar(vcpu, set_reg_val(id, *val));
655 656
			break;
		case KVM_REG_PPC_DSISR:
657
			kvmppc_set_dsisr(vcpu, set_reg_val(id, *val));
658
			break;
659
		case KVM_REG_PPC_FPR0 ... KVM_REG_PPC_FPR31:
660 661
			i = id - KVM_REG_PPC_FPR0;
			VCPU_FPR(vcpu, i) = set_reg_val(id, *val);
662 663
			break;
		case KVM_REG_PPC_FPSCR:
664
			vcpu->arch.fp.fpscr = set_reg_val(id, *val);
665
			break;
666 667 668
#ifdef CONFIG_VSX
		case KVM_REG_PPC_VSR0 ... KVM_REG_PPC_VSR31:
			if (cpu_has_feature(CPU_FTR_VSX)) {
669 670 671
				i = id - KVM_REG_PPC_VSR0;
				vcpu->arch.fp.fpr[i][0] = val->vsxval[0];
				vcpu->arch.fp.fpr[i][1] = val->vsxval[1];
672 673 674 675 676
			} else {
				r = -ENXIO;
			}
			break;
#endif /* CONFIG_VSX */
677 678
#ifdef CONFIG_KVM_XICS
		case KVM_REG_PPC_ICP_STATE:
679
			if (!vcpu->arch.icp && !vcpu->arch.xive_vcpu) {
680 681 682
				r = -ENXIO;
				break;
			}
683 684 685 686
			if (xive_enabled())
				r = kvmppc_xive_set_icp(vcpu, set_reg_val(id, *val));
			else
				r = kvmppc_xics_set_icp(vcpu, set_reg_val(id, *val));
687 688
			break;
#endif /* CONFIG_KVM_XICS */
689
		case KVM_REG_PPC_FSCR:
690
			vcpu->arch.fscr = set_reg_val(id, *val);
691
			break;
692
		case KVM_REG_PPC_TAR:
693
			vcpu->arch.tar = set_reg_val(id, *val);
694
			break;
695
		case KVM_REG_PPC_EBBHR:
696
			vcpu->arch.ebbhr = set_reg_val(id, *val);
697 698
			break;
		case KVM_REG_PPC_EBBRR:
699
			vcpu->arch.ebbrr = set_reg_val(id, *val);
700 701
			break;
		case KVM_REG_PPC_BESCR:
702
			vcpu->arch.bescr = set_reg_val(id, *val);
703
			break;
704
		case KVM_REG_PPC_IC:
705
			vcpu->arch.ic = set_reg_val(id, *val);
706
			break;
707 708 709 710 711 712 713 714 715
		default:
			r = -EINVAL;
			break;
		}
	}

	return r;
}

716 717
void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
{
718
	vcpu->kvm->arch.kvm_ops->vcpu_load(vcpu, cpu);
719 720 721 722
}

void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu)
{
723
	vcpu->kvm->arch.kvm_ops->vcpu_put(vcpu);
724 725 726 727
}

void kvmppc_set_msr(struct kvm_vcpu *vcpu, u64 msr)
{
728
	vcpu->kvm->arch.kvm_ops->set_msr(vcpu, msr);
729
}
730
EXPORT_SYMBOL_GPL(kvmppc_set_msr);
731 732 733

int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
{
734
	return vcpu->kvm->arch.kvm_ops->vcpu_run(kvm_run, vcpu);
735 736
}

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

743 744 745
int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
					struct kvm_guest_debug *dbg)
{
746 747
	vcpu->guest_debug = dbg->control;
	return 0;
748 749
}

750
void kvmppc_decrementer_func(struct kvm_vcpu *vcpu)
751 752 753 754
{
	kvmppc_core_queue_dec(vcpu);
	kvm_vcpu_kick(vcpu);
}
755 756 757

struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm *kvm, unsigned int id)
{
758
	return kvm->arch.kvm_ops->vcpu_create(kvm, id);
759 760 761 762
}

void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu)
{
763
	vcpu->kvm->arch.kvm_ops->vcpu_free(vcpu);
764 765 766 767
}

int kvmppc_core_check_requests(struct kvm_vcpu *vcpu)
{
768
	return vcpu->kvm->arch.kvm_ops->check_requests(vcpu);
769 770 771 772
}

int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log)
{
773
	return kvm->arch.kvm_ops->get_dirty_log(kvm, log);
774 775
}

776
void kvmppc_core_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free,
777 778
			      struct kvm_memory_slot *dont)
{
779
	kvm->arch.kvm_ops->free_memslot(free, dont);
780 781
}

782
int kvmppc_core_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot,
783 784
			       unsigned long npages)
{
785
	return kvm->arch.kvm_ops->create_memslot(slot, npages);
786 787 788 789
}

void kvmppc_core_flush_memslot(struct kvm *kvm, struct kvm_memory_slot *memslot)
{
790
	kvm->arch.kvm_ops->flush_memslot(kvm, memslot);
791 792 793 794
}

int kvmppc_core_prepare_memory_region(struct kvm *kvm,
				struct kvm_memory_slot *memslot,
795
				const struct kvm_userspace_memory_region *mem)
796
{
797
	return kvm->arch.kvm_ops->prepare_memory_region(kvm, memslot, mem);
798 799 800
}

void kvmppc_core_commit_memory_region(struct kvm *kvm,
801
				const struct kvm_userspace_memory_region *mem,
802 803
				const struct kvm_memory_slot *old,
				const struct kvm_memory_slot *new)
804
{
805
	kvm->arch.kvm_ops->commit_memory_region(kvm, mem, old, new);
806 807 808 809
}

int kvm_unmap_hva(struct kvm *kvm, unsigned long hva)
{
810
	return kvm->arch.kvm_ops->unmap_hva(kvm, hva);
811
}
812
EXPORT_SYMBOL_GPL(kvm_unmap_hva);
813 814 815

int kvm_unmap_hva_range(struct kvm *kvm, unsigned long start, unsigned long end)
{
816
	return kvm->arch.kvm_ops->unmap_hva_range(kvm, start, end);
817 818
}

A
Andres Lagar-Cavilla 已提交
819
int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long end)
820
{
A
Andres Lagar-Cavilla 已提交
821
	return kvm->arch.kvm_ops->age_hva(kvm, start, end);
822 823 824 825
}

int kvm_test_age_hva(struct kvm *kvm, unsigned long hva)
{
826
	return kvm->arch.kvm_ops->test_age_hva(kvm, hva);
827 828 829 830
}

void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte)
{
831
	kvm->arch.kvm_ops->set_spte_hva(kvm, hva, pte);
832 833 834 835
}

void kvmppc_mmu_destroy(struct kvm_vcpu *vcpu)
{
836
	vcpu->kvm->arch.kvm_ops->mmu_destroy(vcpu);
837 838 839 840 841 842
}

int kvmppc_core_init_vm(struct kvm *kvm)
{

#ifdef CONFIG_PPC64
843
	INIT_LIST_HEAD_RCU(&kvm->arch.spapr_tce_tables);
844 845 846
	INIT_LIST_HEAD(&kvm->arch.rtas_tokens);
#endif

847
	return kvm->arch.kvm_ops->init_vm(kvm);
848 849 850 851
}

void kvmppc_core_destroy_vm(struct kvm *kvm)
{
852
	kvm->arch.kvm_ops->destroy_vm(kvm);
853 854 855 856 857 858 859

#ifdef CONFIG_PPC64
	kvmppc_rtas_tokens_free(kvm);
	WARN_ON(!list_empty(&kvm->arch.spapr_tce_tables));
#endif
}

860 861 862 863 864
int kvmppc_h_logical_ci_load(struct kvm_vcpu *vcpu)
{
	unsigned long size = kvmppc_get_gpr(vcpu, 4);
	unsigned long addr = kvmppc_get_gpr(vcpu, 5);
	u64 buf;
865
	int srcu_idx;
866 867 868 869 870
	int ret;

	if (!is_power_of_2(size) || (size > sizeof(buf)))
		return H_TOO_HARD;

871
	srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
872
	ret = kvm_io_bus_read(vcpu, KVM_MMIO_BUS, addr, size, &buf);
873
	srcu_read_unlock(&vcpu->kvm->srcu, srcu_idx);
874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907
	if (ret != 0)
		return H_TOO_HARD;

	switch (size) {
	case 1:
		kvmppc_set_gpr(vcpu, 4, *(u8 *)&buf);
		break;

	case 2:
		kvmppc_set_gpr(vcpu, 4, be16_to_cpu(*(__be16 *)&buf));
		break;

	case 4:
		kvmppc_set_gpr(vcpu, 4, be32_to_cpu(*(__be32 *)&buf));
		break;

	case 8:
		kvmppc_set_gpr(vcpu, 4, be64_to_cpu(*(__be64 *)&buf));
		break;

	default:
		BUG();
	}

	return H_SUCCESS;
}
EXPORT_SYMBOL_GPL(kvmppc_h_logical_ci_load);

int kvmppc_h_logical_ci_store(struct kvm_vcpu *vcpu)
{
	unsigned long size = kvmppc_get_gpr(vcpu, 4);
	unsigned long addr = kvmppc_get_gpr(vcpu, 5);
	unsigned long val = kvmppc_get_gpr(vcpu, 6);
	u64 buf;
908
	int srcu_idx;
909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931
	int ret;

	switch (size) {
	case 1:
		*(u8 *)&buf = val;
		break;

	case 2:
		*(__be16 *)&buf = cpu_to_be16(val);
		break;

	case 4:
		*(__be32 *)&buf = cpu_to_be32(val);
		break;

	case 8:
		*(__be64 *)&buf = cpu_to_be64(val);
		break;

	default:
		return H_TOO_HARD;
	}

932
	srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
933
	ret = kvm_io_bus_write(vcpu, KVM_MMIO_BUS, addr, size, &buf);
934
	srcu_read_unlock(&vcpu->kvm->srcu, srcu_idx);
935 936 937 938 939 940 941
	if (ret != 0)
		return H_TOO_HARD;

	return H_SUCCESS;
}
EXPORT_SYMBOL_GPL(kvmppc_h_logical_ci_store);

942 943
int kvmppc_core_check_processor_compat(void)
{
944 945
	/*
	 * We always return 0 for book3s. We check
946
	 * for compatibility while loading the HV
947 948 949 950 951
	 * or PR module
	 */
	return 0;
}

952 953 954 955 956
int kvmppc_book3s_hcall_implemented(struct kvm *kvm, unsigned long hcall)
{
	return kvm->arch.kvm_ops->hcall_implemented(hcall);
}

957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000
#ifdef CONFIG_KVM_XICS
int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level,
		bool line_status)
{
	if (xive_enabled())
		return kvmppc_xive_set_irq(kvm, irq_source_id, irq, level,
					   line_status);
	else
		return kvmppc_xics_set_irq(kvm, irq_source_id, irq, level,
					   line_status);
}

int kvm_arch_set_irq_inatomic(struct kvm_kernel_irq_routing_entry *irq_entry,
			      struct kvm *kvm, int irq_source_id,
			      int level, bool line_status)
{
	return kvm_set_irq(kvm, irq_source_id, irq_entry->gsi,
			   level, line_status);
}
static int kvmppc_book3s_set_irq(struct kvm_kernel_irq_routing_entry *e,
				 struct kvm *kvm, int irq_source_id, int level,
				 bool line_status)
{
	return kvm_set_irq(kvm, irq_source_id, e->gsi, level, line_status);
}

int kvm_irq_map_gsi(struct kvm *kvm,
		    struct kvm_kernel_irq_routing_entry *entries, int gsi)
{
	entries->gsi = gsi;
	entries->type = KVM_IRQ_ROUTING_IRQCHIP;
	entries->set = kvmppc_book3s_set_irq;
	entries->irqchip.irqchip = 0;
	entries->irqchip.pin = gsi;
	return 1;
}

int kvm_irq_map_chip_pin(struct kvm *kvm, unsigned irqchip, unsigned pin)
{
	return pin;
}

#endif /* CONFIG_KVM_XICS */

1001 1002 1003 1004 1005 1006 1007
static int kvmppc_book3s_init(void)
{
	int r;

	r = kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE);
	if (r)
		return r;
1008
#ifdef CONFIG_KVM_BOOK3S_32_HANDLER
1009 1010 1011
	r = kvmppc_book3s_init_pr();
#endif

1012 1013 1014 1015 1016 1017 1018 1019 1020 1021
#ifdef CONFIG_KVM_XICS
#ifdef CONFIG_KVM_XIVE
	if (xive_enabled()) {
		kvmppc_xive_init_module();
		kvm_register_device_ops(&kvm_xive_ops, KVM_DEV_TYPE_XICS);
	} else
#endif
		kvm_register_device_ops(&kvm_xics_ops, KVM_DEV_TYPE_XICS);
#endif
	return r;
1022 1023 1024 1025
}

static void kvmppc_book3s_exit(void)
{
1026 1027 1028 1029
#ifdef CONFIG_KVM_XICS
	if (xive_enabled())
		kvmppc_xive_exit_module();
#endif
1030
#ifdef CONFIG_KVM_BOOK3S_32_HANDLER
1031 1032 1033
	kvmppc_book3s_exit_pr();
#endif
	kvm_exit();
1034
}
1035 1036 1037

module_init(kvmppc_book3s_init);
module_exit(kvmppc_book3s_exit);
1038 1039

/* On 32bit this is our one and only kernel module */
1040
#ifdef CONFIG_KVM_BOOK3S_32_HANDLER
1041 1042 1043
MODULE_ALIAS_MISCDEV(KVM_MINOR);
MODULE_ALIAS("devname:kvm");
#endif