tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * irq.c: API for in kernel interrupt controller
3 * Copyright (c) 2007, Intel Corporation.
4 *
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.
8 *
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.
13 *
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>
19 *
20 */
21
22#include <linux/module.h>
23#include <linux/kvm_host.h>
24
25#include "irq.h"
26
27/*
28 * check if there is pending interrupt without
29 * intack.
30 */
31int kvm_cpu_has_interrupt(struct kvm_vcpu *v)
32{
33 struct kvm_pic *s;
34
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;
41 }
42 return 1;
43}
44EXPORT_SYMBOL_GPL(kvm_cpu_has_interrupt);
45
46/*
47 * Read pending interrupt vector and intack.
48 */
49int kvm_cpu_get_interrupt(struct kvm_vcpu *v)
50{
51 struct kvm_pic *s;
52 int vector;
53
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);
60 }
61 }
62 return vector;
63}
64EXPORT_SYMBOL_GPL(kvm_cpu_get_interrupt);
65
66void kvm_inject_pending_timer_irqs(struct kvm_vcpu *vcpu)
67{
68 kvm_inject_apic_timer_irqs(vcpu);
69 /* TODO: PIT, RTC etc. */
70}
71EXPORT_SYMBOL_GPL(kvm_inject_pending_timer_irqs);
72
73void kvm_timer_intr_post(struct kvm_vcpu *vcpu, int vec)
74{
75 kvm_apic_timer_intr_post(vcpu, vec);
76 /* TODO: PIT, RTC etc. */
77}
78EXPORT_SYMBOL_GPL(kvm_timer_intr_post);