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126 lines
3.3 KiB
126 lines
3.3 KiB
/* |
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* irq.h: in kernel interrupt controller related definitions |
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* Copyright (c) 2007, Intel Corporation. |
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* |
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* This program is free software; you can redistribute it and/or modify it |
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* under the terms and conditions of the GNU General Public License, |
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* version 2, as published by the Free Software Foundation. |
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* |
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* This program is distributed in the hope it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
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* more details. |
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* |
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* You should have received a copy of the GNU General Public License along with |
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* this program; if not, write to the Free Software Foundation, Inc., 59 Temple |
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* Place - Suite 330, Boston, MA 02111-1307 USA. |
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* Authors: |
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* Yaozu (Eddie) Dong <Eddie.dong@intel.com> |
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* |
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*/ |
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#ifndef __IRQ_H |
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#define __IRQ_H |
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#include <linux/mm_types.h> |
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#include <linux/hrtimer.h> |
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#include <linux/kvm_host.h> |
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#include <linux/spinlock.h> |
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#include <kvm/iodev.h> |
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#include "ioapic.h" |
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#include "lapic.h" |
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#define PIC_NUM_PINS 16 |
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#define SELECT_PIC(irq) \ |
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((irq) < 8 ? KVM_IRQCHIP_PIC_MASTER : KVM_IRQCHIP_PIC_SLAVE) |
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struct kvm; |
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struct kvm_vcpu; |
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struct kvm_kpic_state { |
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u8 last_irr; /* edge detection */ |
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u8 irr; /* interrupt request register */ |
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u8 imr; /* interrupt mask register */ |
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u8 isr; /* interrupt service register */ |
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u8 priority_add; /* highest irq priority */ |
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u8 irq_base; |
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u8 read_reg_select; |
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u8 poll; |
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u8 special_mask; |
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u8 init_state; |
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u8 auto_eoi; |
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u8 rotate_on_auto_eoi; |
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u8 special_fully_nested_mode; |
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u8 init4; /* true if 4 byte init */ |
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u8 elcr; /* PIIX edge/trigger selection */ |
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u8 elcr_mask; |
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u8 isr_ack; /* interrupt ack detection */ |
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struct kvm_pic *pics_state; |
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}; |
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struct kvm_pic { |
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spinlock_t lock; |
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bool wakeup_needed; |
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unsigned pending_acks; |
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struct kvm *kvm; |
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struct kvm_kpic_state pics[2]; /* 0 is master pic, 1 is slave pic */ |
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int output; /* intr from master PIC */ |
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struct kvm_io_device dev_master; |
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struct kvm_io_device dev_slave; |
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struct kvm_io_device dev_eclr; |
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void (*ack_notifier)(void *opaque, int irq); |
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unsigned long irq_states[PIC_NUM_PINS]; |
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}; |
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struct kvm_pic *kvm_create_pic(struct kvm *kvm); |
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void kvm_destroy_pic(struct kvm_pic *vpic); |
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int kvm_pic_read_irq(struct kvm *kvm); |
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void kvm_pic_update_irq(struct kvm_pic *s); |
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static inline struct kvm_pic *pic_irqchip(struct kvm *kvm) |
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{ |
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return kvm->arch.vpic; |
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} |
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static inline int pic_in_kernel(struct kvm *kvm) |
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{ |
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int ret; |
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ret = (pic_irqchip(kvm) != NULL); |
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return ret; |
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} |
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static inline int irqchip_split(struct kvm *kvm) |
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{ |
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return kvm->arch.irqchip_split; |
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} |
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static inline int irqchip_in_kernel(struct kvm *kvm) |
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{ |
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struct kvm_pic *vpic = pic_irqchip(kvm); |
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bool ret; |
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ret = (vpic != NULL); |
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ret |= irqchip_split(kvm); |
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/* Read vpic before kvm->irq_routing. */ |
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smp_rmb(); |
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return ret; |
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} |
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void kvm_pic_reset(struct kvm_kpic_state *s); |
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void kvm_inject_pending_timer_irqs(struct kvm_vcpu *vcpu); |
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void kvm_inject_apic_timer_irqs(struct kvm_vcpu *vcpu); |
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void kvm_apic_nmi_wd_deliver(struct kvm_vcpu *vcpu); |
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void __kvm_migrate_apic_timer(struct kvm_vcpu *vcpu); |
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void __kvm_migrate_pit_timer(struct kvm_vcpu *vcpu); |
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void __kvm_migrate_timers(struct kvm_vcpu *vcpu); |
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int apic_has_pending_timer(struct kvm_vcpu *vcpu); |
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int kvm_setup_default_irq_routing(struct kvm *kvm); |
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int kvm_setup_empty_irq_routing(struct kvm *kvm); |
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#endif
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