diff options
Diffstat (limited to 'drivers/kvm/irq.c')
-rw-r--r-- | drivers/kvm/irq.c | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/drivers/kvm/irq.c b/drivers/kvm/irq.c new file mode 100644 index 000000000000..b08005ca7050 --- /dev/null +++ b/drivers/kvm/irq.c | |||
@@ -0,0 +1,61 @@ | |||
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 | { | ||
33 | struct kvm_pic *s = pic_irqchip(v->kvm); | ||
34 | |||
35 | if (s->output) /* PIC */ | ||
36 | return 1; | ||
37 | /* | ||
38 | * TODO: APIC | ||
39 | */ | ||
40 | return 0; | ||
41 | } | ||
42 | EXPORT_SYMBOL_GPL(kvm_cpu_has_interrupt); | ||
43 | |||
44 | /* | ||
45 | * Read pending interrupt vector and intack. | ||
46 | */ | ||
47 | int kvm_cpu_get_interrupt(struct kvm_vcpu *v) | ||
48 | { | ||
49 | struct kvm_pic *s = pic_irqchip(v->kvm); | ||
50 | int vector; | ||
51 | |||
52 | s->output = 0; | ||
53 | vector = kvm_pic_read_irq(s); | ||
54 | if (vector != -1) | ||
55 | return vector; | ||
56 | /* | ||
57 | * TODO: APIC | ||
58 | */ | ||
59 | return -1; | ||
60 | } | ||
61 | EXPORT_SYMBOL_GPL(kvm_cpu_get_interrupt); | ||