projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 85f455f7 ED |
1 | /* |
| 2 | * irq.c: API for in kernel interrupt controller | |
| 3 | * Copyright (c) 2007, Intel Corporation. | |
| 9611c187 | 4 | * Copyright 2009 Red Hat, Inc. and/or its affiliates. |
| 85f455f7 ED |
5 | * |
| 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. | |
| 9 | * | |
| 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. | |
| 14 | * | |
| 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 <[email protected]> | |
| 20 | * | |
| 21 | */ | |
| 22 | ||
| 23 | #include <linux/module.h> | |
| edf88417 | 24 | #include <linux/kvm_host.h> |
| 85f455f7 | 25 | |
| 85f455f7 | 26 | #include "irq.h" |
| 7837699f | 27 | #include "i8254.h" |
| 8061823a | 28 | #include "x86.h" |
| 85f455f7 | 29 | |
| 3d80840d MT |
30 | /* |
| 31 | * check if there are pending timer events | |
| 32 | * to be processed. | |
| 33 | */ | |
| 34 | int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu) | |
| 35 | { | |
| 23e7a794 | 36 | return apic_has_pending_timer(vcpu); |
| 3d80840d MT |
37 | } |
| 38 | EXPORT_SYMBOL(kvm_cpu_has_pending_timer); | |
| 39 | ||
| 85f455f7 ED |
40 | /* |
| 41 | * check if there is pending interrupt without | |
| 42 | * intack. | |
| 43 | */ | |
| 44 | int kvm_cpu_has_interrupt(struct kvm_vcpu *v) | |
| 45 | { | |
| 97222cc8 ED |
46 | struct kvm_pic *s; |
| 47 | ||
| 8061823a | 48 | if (!irqchip_in_kernel(v->kvm)) |
| 923c61bb | 49 | return v->arch.interrupt.pending; |
| 8061823a | 50 | |
| 97222cc8 | 51 | if (kvm_apic_has_interrupt(v) == -1) { /* LAPIC */ |
| 40487c68 QH |
52 | if (kvm_apic_accept_pic_intr(v)) { |
| 53 | s = pic_irqchip(v->kvm); /* PIC */ | |
| 54 | return s->output; | |
| 55 | } else | |
| 56 | return 0; | |
| 97222cc8 ED |
57 | } |
| 58 | return 1; | |
| 85f455f7 ED |
59 | } |
| 60 | EXPORT_SYMBOL_GPL(kvm_cpu_has_interrupt); | |
| 61 | ||
| 62 | /* | |
| 63 | * Read pending interrupt vector and intack. | |
| 64 | */ | |
| 65 | int kvm_cpu_get_interrupt(struct kvm_vcpu *v) | |
| 66 | { | |
| 97222cc8 | 67 | struct kvm_pic *s; |
| 85f455f7 ED |
68 | int vector; |
| 69 | ||
| 8061823a | 70 | if (!irqchip_in_kernel(v->kvm)) |
| 923c61bb | 71 | return v->arch.interrupt.nr; |
| 8061823a | 72 | |
| 97222cc8 ED |
73 | vector = kvm_get_apic_interrupt(v); /* APIC */ |
| 74 | if (vector == -1) { | |
| 40487c68 QH |
75 | if (kvm_apic_accept_pic_intr(v)) { |
| 76 | s = pic_irqchip(v->kvm); | |
| 77 | s->output = 0; /* PIC */ | |
| f5244726 | 78 | vector = kvm_pic_read_irq(v->kvm); |
| 40487c68 | 79 | } |
| 97222cc8 ED |
80 | } |
| 81 | return vector; | |
| 85f455f7 ED |
82 | } |
| 83 | EXPORT_SYMBOL_GPL(kvm_cpu_get_interrupt); | |
| 97222cc8 | 84 | |
| 1b9778da ED |
85 | void kvm_inject_pending_timer_irqs(struct kvm_vcpu *vcpu) |
| 86 | { | |
| 87 | kvm_inject_apic_timer_irqs(vcpu); | |
| 88 | /* TODO: PIT, RTC etc. */ | |
| 89 | } | |
| 90 | EXPORT_SYMBOL_GPL(kvm_inject_pending_timer_irqs); | |
| 91 | ||
| 2f599714 MT |
92 | void __kvm_migrate_timers(struct kvm_vcpu *vcpu) |
| 93 | { | |
| 94 | __kvm_migrate_apic_timer(vcpu); | |
| 95 | __kvm_migrate_pit_timer(vcpu); | |
| 96 | } |