linux/arch/x86/kvm/irq.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * irq.c: API for in kernel interrupt controller
 * Copyright (c) 2007, Intel Corporation.
 * Copyright 2009 Red Hat, Inc. and/or its affiliates.
 *
 * Authors:
 *   Yaozu (Eddie) Dong <[email protected]>
 */
#define pr_fmt(fmt) …

#include <linux/export.h>
#include <linux/kvm_host.h>

#include "irq.h"
#include "i8254.h"
#include "x86.h"
#include "xen.h"

/*
 * check if there are pending timer events
 * to be processed.
 */
int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
{ … }

/*
 * check if there is a pending userspace external interrupt
 */
static int pending_userspace_extint(struct kvm_vcpu *v)
{ … }

/*
 * check if there is pending interrupt from
 * non-APIC source without intack.
 */
int kvm_cpu_has_extint(struct kvm_vcpu *v)
{ … }

/*
 * check if there is injectable interrupt:
 * when virtual interrupt delivery enabled,
 * interrupt from apic will handled by hardware,
 * we don't need to check it here.
 */
int kvm_cpu_has_injectable_intr(struct kvm_vcpu *v)
{ … }
EXPORT_SYMBOL_GPL(…);

/*
 * check if there is pending interrupt without
 * intack.
 */
int kvm_cpu_has_interrupt(struct kvm_vcpu *v)
{ … }
EXPORT_SYMBOL_GPL(…);

/*
 * Read pending interrupt(from non-APIC source)
 * vector and intack.
 */
static int kvm_cpu_get_extint(struct kvm_vcpu *v)
{ … }

/*
 * Read pending interrupt vector and intack.
 */
int kvm_cpu_get_interrupt(struct kvm_vcpu *v)
{ … }
EXPORT_SYMBOL_GPL(…);

void kvm_inject_pending_timer_irqs(struct kvm_vcpu *vcpu)
{ … }

void __kvm_migrate_timers(struct kvm_vcpu *vcpu)
{ … }

bool kvm_arch_irqfd_allowed(struct kvm *kvm, struct kvm_irqfd *args)
{ … }

bool kvm_arch_irqchip_in_kernel(struct kvm *kvm)
{ … }