2 * irq.c: API for in kernel interrupt controller
3 * Copyright (c) 2007, Intel Corporation.
4 * Copyright 2009 Red Hat, Inc. and/or its affilates.
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms and conditions of the GNU General Public License,
8 * version 2, as published by the Free Software Foundation.
10 * This program is distributed in the hope it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 * You should have received a copy of the GNU General Public License along with
16 * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
17 * Place - Suite 330, Boston, MA 02111-1307 USA.
19 * Yaozu (Eddie) Dong <Eddie.dong@intel.com>
23 #include <linux/module.h>
24 #include <linux/kvm_host.h>
31 * check if there are pending timer events
34 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
38 ret = pit_has_pending_timer(vcpu);
39 ret |= apic_has_pending_timer(vcpu);
43 EXPORT_SYMBOL(kvm_cpu_has_pending_timer);
46 * check if there is pending interrupt without
49 int kvm_cpu_has_interrupt(struct kvm_vcpu *v)
53 if (!irqchip_in_kernel(v->kvm))
54 return v->arch.interrupt.pending;
56 if (kvm_apic_has_interrupt(v) == -1) { /* LAPIC */
57 if (kvm_apic_accept_pic_intr(v)) {
58 s = pic_irqchip(v->kvm); /* PIC */
65 EXPORT_SYMBOL_GPL(kvm_cpu_has_interrupt);
68 * Read pending interrupt vector and intack.
70 int kvm_cpu_get_interrupt(struct kvm_vcpu *v)
75 if (!irqchip_in_kernel(v->kvm))
76 return v->arch.interrupt.nr;
78 vector = kvm_get_apic_interrupt(v); /* APIC */
80 if (kvm_apic_accept_pic_intr(v)) {
81 s = pic_irqchip(v->kvm);
82 s->output = 0; /* PIC */
83 vector = kvm_pic_read_irq(v->kvm);
88 EXPORT_SYMBOL_GPL(kvm_cpu_get_interrupt);
90 void kvm_inject_pending_timer_irqs(struct kvm_vcpu *vcpu)
92 kvm_inject_apic_timer_irqs(vcpu);
93 /* TODO: PIT, RTC etc. */
95 EXPORT_SYMBOL_GPL(kvm_inject_pending_timer_irqs);
97 void __kvm_migrate_timers(struct kvm_vcpu *vcpu)
99 __kvm_migrate_apic_timer(vcpu);
100 __kvm_migrate_pit_timer(vcpu);