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. | |
| 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 <[email protected]> | |
| 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 */ | |
| 40487c68 QH |
36 | if (kvm_apic_accept_pic_intr(v)) { |
| 37 | s = pic_irqchip(v->kvm); /* PIC */ | |
| 38 | return s->output; | |
| 39 | } else | |
| 40 | return 0; | |
| 97222cc8 ED |
41 | } |
| 42 | return 1; | |
| 85f455f7 ED |
43 | } |
| 44 | EXPORT_SYMBOL_GPL(kvm_cpu_has_interrupt); | |
| 45 | ||
| 46 | /* | |
| 47 | * Read pending interrupt vector and intack. | |
| 48 | */ | |
| 49 | int kvm_cpu_get_interrupt(struct kvm_vcpu *v) | |
| 50 | { | |
| 97222cc8 | 51 | struct kvm_pic *s; |
| 85f455f7 ED |
52 | int vector; |
| 53 | ||
| 97222cc8 ED |
54 | vector = kvm_get_apic_interrupt(v); /* APIC */ |
| 55 | if (vector == -1) { | |
| 40487c68 QH |
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 | } | |
| 97222cc8 ED |
61 | } |
| 62 | return vector; | |
| 85f455f7 ED |
63 | } |
| 64 | EXPORT_SYMBOL_GPL(kvm_cpu_get_interrupt); | |
| 97222cc8 ED |
65 | |
| 66 | static 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 | ||
| 74 | void kvm_vcpu_kick(struct kvm_vcpu *vcpu) | |
| 75 | { | |
| 76 | int ipi_pcpu = vcpu->cpu; | |
| 77 | ||
| b6958ce4 ED |
78 | if (waitqueue_active(&vcpu->wq)) { |
| 79 | wake_up_interruptible(&vcpu->wq); | |
| 80 | ++vcpu->stat.halt_wakeup; | |
| 81 | } | |
| 97222cc8 ED |
82 | if (vcpu->guest_mode) |
| 83 | smp_call_function_single(ipi_pcpu, vcpu_kick_intr, vcpu, 0, 0); | |
| 84 | } | |
| 85 | ||
| 1b9778da ED |
86 | void kvm_inject_pending_timer_irqs(struct kvm_vcpu *vcpu) |
| 87 | { | |
| 88 | kvm_inject_apic_timer_irqs(vcpu); | |
| 89 | /* TODO: PIT, RTC etc. */ | |
| 90 | } | |
| 91 | EXPORT_SYMBOL_GPL(kvm_inject_pending_timer_irqs); | |
| 92 | ||
| 93 | void 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 | } | |
| 98 | EXPORT_SYMBOL_GPL(kvm_timer_intr_post); |