Commit | Line | Data |
---|---|---|
85f455f7 ED |
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 | ||
24 | #include "kvm.h" | |
25 | #include "irq.h" | |
26 | ||
27 | /* | |
28 | * check if there is pending interrupt without | |
29 | * intack. | |
30 | */ | |
31 | int kvm_cpu_has_interrupt(struct kvm_vcpu *v) | |
32 | { | |
97222cc8 ED |
33 | struct kvm_pic *s; |
34 | ||
35 | if (kvm_apic_has_interrupt(v) == -1) { /* LAPIC */ | |
36 | s = pic_irqchip(v->kvm); /* PIC */ | |
37 | return s->output; | |
38 | } | |
39 | return 1; | |
85f455f7 ED |
40 | } |
41 | EXPORT_SYMBOL_GPL(kvm_cpu_has_interrupt); | |
42 | ||
43 | /* | |
44 | * Read pending interrupt vector and intack. | |
45 | */ | |
46 | int kvm_cpu_get_interrupt(struct kvm_vcpu *v) | |
47 | { | |
97222cc8 | 48 | struct kvm_pic *s; |
85f455f7 ED |
49 | int vector; |
50 | ||
97222cc8 ED |
51 | vector = kvm_get_apic_interrupt(v); /* APIC */ |
52 | if (vector == -1) { | |
53 | s = pic_irqchip(v->kvm); | |
54 | s->output = 0; /* PIC */ | |
55 | vector = kvm_pic_read_irq(s); | |
56 | } | |
57 | return vector; | |
85f455f7 ED |
58 | } |
59 | EXPORT_SYMBOL_GPL(kvm_cpu_get_interrupt); | |
97222cc8 ED |
60 | |
61 | static void vcpu_kick_intr(void *info) | |
62 | { | |
63 | #ifdef DEBUG | |
64 | struct kvm_vcpu *vcpu = (struct kvm_vcpu *)info; | |
65 | printk(KERN_DEBUG "vcpu_kick_intr %p \n", vcpu); | |
66 | #endif | |
67 | } | |
68 | ||
69 | void kvm_vcpu_kick(struct kvm_vcpu *vcpu) | |
70 | { | |
71 | int ipi_pcpu = vcpu->cpu; | |
72 | ||
b6958ce4 ED |
73 | if (waitqueue_active(&vcpu->wq)) { |
74 | wake_up_interruptible(&vcpu->wq); | |
75 | ++vcpu->stat.halt_wakeup; | |
76 | } | |
97222cc8 ED |
77 | if (vcpu->guest_mode) |
78 | smp_call_function_single(ipi_pcpu, vcpu_kick_intr, vcpu, 0, 0); | |
79 | } | |
80 | ||
1b9778da ED |
81 | void kvm_inject_pending_timer_irqs(struct kvm_vcpu *vcpu) |
82 | { | |
83 | kvm_inject_apic_timer_irqs(vcpu); | |
84 | /* TODO: PIT, RTC etc. */ | |
85 | } | |
86 | EXPORT_SYMBOL_GPL(kvm_inject_pending_timer_irqs); | |
87 | ||
88 | void kvm_timer_intr_post(struct kvm_vcpu *vcpu, int vec) | |
89 | { | |
90 | kvm_apic_timer_intr_post(vcpu, vec); | |
91 | /* TODO: PIT, RTC etc. */ | |
92 | } | |
93 | EXPORT_SYMBOL_GPL(kvm_timer_intr_post); |