ARM: 7409/1: Do not call flush_cache_user_range with mmap_sem held
[linux/fpc-iii.git] / arch / x86 / kvm / irq.c
blob7e06ba1618bd73168226a4a299895778e4a00065
1 /*
2 * irq.c: API for in kernel interrupt controller
3 * Copyright (c) 2007, Intel Corporation.
4 * Copyright 2009 Red Hat, Inc. and/or its affiliates.
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms and conditions of the GNU General Public License,
8 * version 2, as published by the Free Software Foundation.
10 * This program is distributed in the hope it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 * more details.
15 * You should have received a copy of the GNU General Public License along with
16 * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
17 * Place - Suite 330, Boston, MA 02111-1307 USA.
18 * Authors:
19 * Yaozu (Eddie) Dong <Eddie.dong@intel.com>
23 #include <linux/module.h>
24 #include <linux/kvm_host.h>
26 #include "irq.h"
27 #include "i8254.h"
28 #include "x86.h"
31 * check if there are pending timer events
32 * to be processed.
34 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
36 return apic_has_pending_timer(vcpu);
38 EXPORT_SYMBOL(kvm_cpu_has_pending_timer);
41 * check if there is pending interrupt without
42 * intack.
44 int kvm_cpu_has_interrupt(struct kvm_vcpu *v)
46 struct kvm_pic *s;
48 if (!irqchip_in_kernel(v->kvm))
49 return v->arch.interrupt.pending;
51 if (kvm_apic_has_interrupt(v) == -1) { /* LAPIC */
52 if (kvm_apic_accept_pic_intr(v)) {
53 s = pic_irqchip(v->kvm); /* PIC */
54 return s->output;
55 } else
56 return 0;
58 return 1;
60 EXPORT_SYMBOL_GPL(kvm_cpu_has_interrupt);
63 * Read pending interrupt vector and intack.
65 int kvm_cpu_get_interrupt(struct kvm_vcpu *v)
67 struct kvm_pic *s;
68 int vector;
70 if (!irqchip_in_kernel(v->kvm))
71 return v->arch.interrupt.nr;
73 vector = kvm_get_apic_interrupt(v); /* APIC */
74 if (vector == -1) {
75 if (kvm_apic_accept_pic_intr(v)) {
76 s = pic_irqchip(v->kvm);
77 s->output = 0; /* PIC */
78 vector = kvm_pic_read_irq(v->kvm);
81 return vector;
83 EXPORT_SYMBOL_GPL(kvm_cpu_get_interrupt);
85 void kvm_inject_pending_timer_irqs(struct kvm_vcpu *vcpu)
87 kvm_inject_apic_timer_irqs(vcpu);
88 /* TODO: PIT, RTC etc. */
90 EXPORT_SYMBOL_GPL(kvm_inject_pending_timer_irqs);
92 void __kvm_migrate_timers(struct kvm_vcpu *vcpu)
94 __kvm_migrate_apic_timer(vcpu);
95 __kvm_migrate_pit_timer(vcpu);