/* * irq.c: API for in kernel interrupt controller * Copyright (c) 2007, Intel Corporation. * * This program is free software; you can redistribute it and/or modify it * under the terms and conditions of the GNU General Public License, * version 2, as published by the Free Software Foundation. * * This program is distributed in the hope it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for * more details. * * You should have received a copy of the GNU General Public License along with * this program; if not, write to the Free Software Foundation, Inc., 59 Temple * Place - Suite 330, Boston, MA 02111-1307 USA. * Authors: * Yaozu (Eddie) Dong <Eddie.dong@intel.com> * */ #include <linux/module.h> #include <linux/kvm_host.h> #include "irq.h" #include "i8254.h" #include "x86.h" /* * check if there are pending timer events * to be processed. */ int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu) { int ret; ret = pit_has_pending_timer(vcpu); ret |= apic_has_pending_timer(vcpu); return ret; } EXPORT_SYMBOL(kvm_cpu_has_pending_timer); /* * check if there is pending interrupt without * intack. */ int kvm_cpu_has_interrupt(struct kvm_vcpu *v) { struct kvm_pic *s; if (!irqchip_in_kernel(v->kvm)) return v->arch.interrupt.pending; if (kvm_apic_has_interrupt(v) == -1) { /* LAPIC */ if (kvm_apic_accept_pic_intr(v)) { s = pic_irqchip(v->kvm); /* PIC */ return s->output; } else return 0; } return 1; } EXPORT_SYMBOL_GPL(kvm_cpu_has_interrupt); /* * Read pending interrupt vector and intack. */ int kvm_cpu_get_interrupt(struct kvm_vcpu *v) { struct kvm_pic *s; int vector; if (!irqchip_in_kernel(v->kvm)) return v->arch.interrupt.nr; vector = kvm_get_apic_interrupt(v); /* APIC */ if (vector == -1) { if (kvm_apic_accept_pic_intr(v)) { s = pic_irqchip(v->kvm); s->output = 0; /* PIC */ vector = kvm_pic_read_irq(v->kvm); } } return vector; } EXPORT_SYMBOL_GPL(kvm_cpu_get_interrupt); void kvm_inject_pending_timer_irqs(struct kvm_vcpu *vcpu) { kvm_inject_apic_timer_irqs(vcpu); kvm_inject_pit_timer_irqs(vcpu); /* TODO: PIT, RTC etc. */ } EXPORT_SYMBOL_GPL(kvm_inject_pending_timer_irqs); void __kvm_migrate_timers(struct kvm_vcpu *vcpu) { __kvm_migrate_apic_timer(vcpu); __kvm_migrate_pit_timer(vcpu); }