Eddie Dong | 85f455f | 2007-07-06 12:20:49 +0300 | [diff] [blame] | 1 | /* |
| 2 | * irq.h: in kernel interrupt controller related definitions |
| 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 | #ifndef __IRQ_H |
| 23 | #define __IRQ_H |
| 24 | |
Hollis Blanchard | e01a1b5 | 2007-12-03 15:30:25 -0600 | [diff] [blame] | 25 | #include <linux/mm_types.h> |
| 26 | #include <linux/hrtimer.h> |
Avi Kivity | edf8841 | 2007-12-16 11:02:48 +0200 | [diff] [blame] | 27 | #include <linux/kvm_host.h> |
Avi Kivity | 3f35385 | 2008-12-21 22:48:32 +0200 | [diff] [blame] | 28 | #include <linux/spinlock.h> |
Zhang Xiantao | 8247019 | 2007-12-17 13:59:56 +0800 | [diff] [blame] | 29 | |
Andre Przywara | af669ac | 2015-03-26 14:39:29 +0000 | [diff] [blame] | 30 | #include <kvm/iodev.h> |
Zhang Xiantao | 8247019 | 2007-12-17 13:59:56 +0800 | [diff] [blame] | 31 | #include "ioapic.h" |
| 32 | #include "lapic.h" |
Eddie Dong | 85f455f | 2007-07-06 12:20:49 +0300 | [diff] [blame] | 33 | |
Ben-Ami Yassour | c65bbfa | 2008-07-06 17:15:07 +0300 | [diff] [blame] | 34 | #define PIC_NUM_PINS 16 |
Marcelo Tosatti | 44882ee | 2009-01-27 15:12:38 -0200 | [diff] [blame] | 35 | #define SELECT_PIC(irq) \ |
| 36 | ((irq) < 8 ? KVM_IRQCHIP_PIC_MASTER : KVM_IRQCHIP_PIC_SLAVE) |
Ben-Ami Yassour | c65bbfa | 2008-07-06 17:15:07 +0300 | [diff] [blame] | 37 | |
Hollis Blanchard | e01a1b5 | 2007-12-03 15:30:25 -0600 | [diff] [blame] | 38 | struct kvm; |
| 39 | struct kvm_vcpu; |
| 40 | |
Eddie Dong | 85f455f | 2007-07-06 12:20:49 +0300 | [diff] [blame] | 41 | struct kvm_kpic_state { |
| 42 | u8 last_irr; /* edge detection */ |
| 43 | u8 irr; /* interrupt request register */ |
| 44 | u8 imr; /* interrupt mask register */ |
| 45 | u8 isr; /* interrupt service register */ |
| 46 | u8 priority_add; /* highest irq priority */ |
| 47 | u8 irq_base; |
| 48 | u8 read_reg_select; |
| 49 | u8 poll; |
| 50 | u8 special_mask; |
| 51 | u8 init_state; |
| 52 | u8 auto_eoi; |
| 53 | u8 rotate_on_auto_eoi; |
| 54 | u8 special_fully_nested_mode; |
| 55 | u8 init4; /* true if 4 byte init */ |
| 56 | u8 elcr; /* PIIX edge/trigger selection */ |
| 57 | u8 elcr_mask; |
Gleb Natapov | eebb5f3 | 2010-08-30 12:49:13 +0300 | [diff] [blame] | 58 | u8 isr_ack; /* interrupt ack detection */ |
Eddie Dong | 85f455f | 2007-07-06 12:20:49 +0300 | [diff] [blame] | 59 | struct kvm_pic *pics_state; |
| 60 | }; |
| 61 | |
| 62 | struct kvm_pic { |
Avi Kivity | f4f5105 | 2010-09-19 18:44:07 +0200 | [diff] [blame] | 63 | spinlock_t lock; |
Jan Kiszka | 50a085b | 2010-02-24 10:41:58 +0100 | [diff] [blame] | 64 | bool wakeup_needed; |
Avi Kivity | 3f35385 | 2008-12-21 22:48:32 +0200 | [diff] [blame] | 65 | unsigned pending_acks; |
| 66 | struct kvm *kvm; |
Eddie Dong | 85f455f | 2007-07-06 12:20:49 +0300 | [diff] [blame] | 67 | struct kvm_kpic_state pics[2]; /* 0 is master pic, 1 is slave pic */ |
Eddie Dong | 85f455f | 2007-07-06 12:20:49 +0300 | [diff] [blame] | 68 | int output; /* intr from master PIC */ |
Sasha Levin | 743eeb0 | 2011-07-27 16:00:48 +0300 | [diff] [blame] | 69 | struct kvm_io_device dev_master; |
| 70 | struct kvm_io_device dev_slave; |
| 71 | struct kvm_io_device dev_eclr; |
Marcelo Tosatti | f524472 | 2008-07-26 17:01:00 -0300 | [diff] [blame] | 72 | void (*ack_notifier)(void *opaque, int irq); |
Michael S. Tsirkin | 93b6547 | 2012-07-19 13:55:53 +0300 | [diff] [blame] | 73 | unsigned long irq_states[PIC_NUM_PINS]; |
Eddie Dong | 85f455f | 2007-07-06 12:20:49 +0300 | [diff] [blame] | 74 | }; |
| 75 | |
| 76 | struct kvm_pic *kvm_create_pic(struct kvm *kvm); |
Paolo Bonzini | 71ba994 | 2015-07-29 12:31:15 +0200 | [diff] [blame] | 77 | void kvm_destroy_pic(struct kvm_pic *vpic); |
Marcelo Tosatti | f524472 | 2008-07-26 17:01:00 -0300 | [diff] [blame] | 78 | int kvm_pic_read_irq(struct kvm *kvm); |
He, Qing | 6ceb9d7 | 2007-07-26 11:05:18 +0300 | [diff] [blame] | 79 | void kvm_pic_update_irq(struct kvm_pic *s); |
Eddie Dong | 85f455f | 2007-07-06 12:20:49 +0300 | [diff] [blame] | 80 | |
Zhang Xiantao | 682c59a | 2007-12-11 20:36:00 +0800 | [diff] [blame] | 81 | static inline struct kvm_pic *pic_irqchip(struct kvm *kvm) |
| 82 | { |
Zhang Xiantao | d7deeeb0 | 2007-12-14 10:17:34 +0800 | [diff] [blame] | 83 | return kvm->arch.vpic; |
Zhang Xiantao | 682c59a | 2007-12-11 20:36:00 +0800 | [diff] [blame] | 84 | } |
| 85 | |
Steve Rutherford | 1c1a9ce | 2015-07-30 11:27:16 +0200 | [diff] [blame] | 86 | static inline int pic_in_kernel(struct kvm *kvm) |
| 87 | { |
| 88 | int ret; |
| 89 | |
| 90 | ret = (pic_irqchip(kvm) != NULL); |
| 91 | return ret; |
| 92 | } |
| 93 | |
Steve Rutherford | 49df639 | 2015-07-29 23:21:40 -0700 | [diff] [blame] | 94 | static inline int irqchip_split(struct kvm *kvm) |
| 95 | { |
| 96 | return kvm->arch.irqchip_split; |
| 97 | } |
| 98 | |
Zhang Xiantao | 682c59a | 2007-12-11 20:36:00 +0800 | [diff] [blame] | 99 | static inline int irqchip_in_kernel(struct kvm *kvm) |
| 100 | { |
Paolo Bonzini | 71ba994 | 2015-07-29 12:31:15 +0200 | [diff] [blame] | 101 | struct kvm_pic *vpic = pic_irqchip(kvm); |
Steve Rutherford | 49df639 | 2015-07-29 23:21:40 -0700 | [diff] [blame] | 102 | bool ret; |
| 103 | |
| 104 | ret = (vpic != NULL); |
| 105 | ret |= irqchip_split(kvm); |
Marcelo Tosatti | 3ddea12 | 2009-10-29 13:44:15 -0200 | [diff] [blame] | 106 | |
Paolo Bonzini | 71ba994 | 2015-07-29 12:31:15 +0200 | [diff] [blame] | 107 | /* Read vpic before kvm->irq_routing. */ |
Marcelo Tosatti | 3ddea12 | 2009-10-29 13:44:15 -0200 | [diff] [blame] | 108 | smp_rmb(); |
Steve Rutherford | 49df639 | 2015-07-29 23:21:40 -0700 | [diff] [blame] | 109 | return ret; |
Zhang Xiantao | 682c59a | 2007-12-11 20:36:00 +0800 | [diff] [blame] | 110 | } |
| 111 | |
Eddie Dong | 2fcceae | 2007-10-10 12:14:25 +0200 | [diff] [blame] | 112 | void kvm_pic_reset(struct kvm_kpic_state *s); |
Zhang Xiantao | 8be5453 | 2007-12-02 22:35:57 +0800 | [diff] [blame] | 113 | |
Eddie Dong | 1b9778d | 2007-09-03 16:56:58 +0300 | [diff] [blame] | 114 | void kvm_inject_pending_timer_irqs(struct kvm_vcpu *vcpu); |
| 115 | void kvm_inject_apic_timer_irqs(struct kvm_vcpu *vcpu); |
Jan Kiszka | 8fdb235 | 2008-10-20 10:20:02 +0200 | [diff] [blame] | 116 | void kvm_apic_nmi_wd_deliver(struct kvm_vcpu *vcpu); |
Avi Kivity | 2f52d58 | 2008-01-16 12:49:30 +0200 | [diff] [blame] | 117 | void __kvm_migrate_apic_timer(struct kvm_vcpu *vcpu); |
Marcelo Tosatti | 2f59971 | 2008-05-27 12:10:20 -0300 | [diff] [blame] | 118 | void __kvm_migrate_pit_timer(struct kvm_vcpu *vcpu); |
| 119 | void __kvm_migrate_timers(struct kvm_vcpu *vcpu); |
Eddie Dong | 97222cc | 2007-09-12 10:58:04 +0300 | [diff] [blame] | 120 | |
Marcelo Tosatti | 3d80840 | 2008-04-11 14:53:26 -0300 | [diff] [blame] | 121 | int apic_has_pending_timer(struct kvm_vcpu *vcpu); |
| 122 | |
Eddie Dong | 85f455f | 2007-07-06 12:20:49 +0300 | [diff] [blame] | 123 | #endif |