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authorAvi Kivity <avi@qumranet.com>2007-12-16 04:02:48 -0500
committerAvi Kivity <avi@qumranet.com>2008-01-30 11:01:18 -0500
commitedf884172e9828c6234b254208af04655855038d (patch)
treef5e5d1eecaed9737eced6ba60d09fe93149751c1 /arch/x86/kvm/irq.c
parent9584bf2c93f56656dba0de8f6c75b54ca7995143 (diff)
KVM: Move arch dependent files to new directory arch/x86/kvm/
This paves the way for multiple architecture support. Note that while ioapic.c could potentially be shared with ia64, it is also moved. Signed-off-by: Avi Kivity <avi@qumranet.com>
Diffstat (limited to 'arch/x86/kvm/irq.c')
-rw-r--r--arch/x86/kvm/irq.c98
1 files changed, 98 insertions, 0 deletions
diff --git a/arch/x86/kvm/irq.c b/arch/x86/kvm/irq.c
new file mode 100644
index 000000000000..07a09aad4fd6
--- /dev/null
+++ b/arch/x86/kvm/irq.c
@@ -0,0 +1,98 @@
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
66static void vcpu_kick_intr(void *info)
67{
68#ifdef DEBUG
69 struct kvm_vcpu *vcpu = (struct kvm_vcpu *)info;
70 printk(KERN_DEBUG "vcpu_kick_intr %p \n", vcpu);
71#endif
72}
73
74void kvm_vcpu_kick(struct kvm_vcpu *vcpu)
75{
76 int ipi_pcpu = vcpu->cpu;
77
78 if (waitqueue_active(&vcpu->wq)) {
79 wake_up_interruptible(&vcpu->wq);
80 ++vcpu->stat.halt_wakeup;
81 }
82 if (vcpu->guest_mode)
83 smp_call_function_single(ipi_pcpu, vcpu_kick_intr, vcpu, 0, 0);
84}
85
86void kvm_inject_pending_timer_irqs(struct kvm_vcpu *vcpu)
87{
88 kvm_inject_apic_timer_irqs(vcpu);
89 /* TODO: PIT, RTC etc. */
90}
91EXPORT_SYMBOL_GPL(kvm_inject_pending_timer_irqs);
92
93void kvm_timer_intr_post(struct kvm_vcpu *vcpu, int vec)
94{
95 kvm_apic_timer_intr_post(vcpu, vec);
96 /* TODO: PIT, RTC etc. */
97}
98EXPORT_SYMBOL_GPL(kvm_timer_intr_post);