pcmcia: CompactFlash driver for PA Semi Electra boards
[pv_ops_mirror.git] / drivers / kvm / irq.c
blob7628c7ff628ff1db90f3a9a4d20df792bb59f4ad
1 /*
2 * irq.c: API for in kernel interrupt controller
3 * Copyright (c) 2007, Intel Corporation.
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms and conditions of the GNU General Public License,
7 * version 2, as published by the Free Software Foundation.
9 * This program is distributed in the hope it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
12 * more details.
14 * You should have received a copy of the GNU General Public License along with
15 * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
16 * Place - Suite 330, Boston, MA 02111-1307 USA.
17 * Authors:
18 * Yaozu (Eddie) Dong <Eddie.dong@intel.com>
22 #include <linux/module.h>
24 #include "kvm.h"
25 #include "irq.h"
28 * check if there is pending interrupt without
29 * intack.
31 int kvm_cpu_has_interrupt(struct kvm_vcpu *v)
33 struct kvm_pic *s;
35 if (kvm_apic_has_interrupt(v) == -1) { /* LAPIC */
36 if (kvm_apic_accept_pic_intr(v)) {
37 s = pic_irqchip(v->kvm); /* PIC */
38 return s->output;
39 } else
40 return 0;
42 return 1;
44 EXPORT_SYMBOL_GPL(kvm_cpu_has_interrupt);
47 * Read pending interrupt vector and intack.
49 int kvm_cpu_get_interrupt(struct kvm_vcpu *v)
51 struct kvm_pic *s;
52 int vector;
54 vector = kvm_get_apic_interrupt(v); /* APIC */
55 if (vector == -1) {
56 if (kvm_apic_accept_pic_intr(v)) {
57 s = pic_irqchip(v->kvm);
58 s->output = 0; /* PIC */
59 vector = kvm_pic_read_irq(s);
62 return vector;
64 EXPORT_SYMBOL_GPL(kvm_cpu_get_interrupt);
66 static void vcpu_kick_intr(void *info)
68 #ifdef DEBUG
69 struct kvm_vcpu *vcpu = (struct kvm_vcpu *)info;
70 printk(KERN_DEBUG "vcpu_kick_intr %p \n", vcpu);
71 #endif
74 void kvm_vcpu_kick(struct kvm_vcpu *vcpu)
76 int ipi_pcpu = vcpu->cpu;
78 if (waitqueue_active(&vcpu->wq)) {
79 wake_up_interruptible(&vcpu->wq);
80 ++vcpu->stat.halt_wakeup;
82 if (vcpu->guest_mode)
83 smp_call_function_single(ipi_pcpu, vcpu_kick_intr, vcpu, 0, 0);
86 void kvm_inject_pending_timer_irqs(struct kvm_vcpu *vcpu)
88 kvm_inject_apic_timer_irqs(vcpu);
89 /* TODO: PIT, RTC etc. */
91 EXPORT_SYMBOL_GPL(kvm_inject_pending_timer_irqs);
93 void kvm_timer_intr_post(struct kvm_vcpu *vcpu, int vec)
95 kvm_apic_timer_intr_post(vcpu, vec);
96 /* TODO: PIT, RTC etc. */
98 EXPORT_SYMBOL_GPL(kvm_timer_intr_post);