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Diffstat (limited to '')
| -rw-r--r-- | arch/x86/kvm/irq.h | 130 |
1 files changed, 130 insertions, 0 deletions
diff --git a/arch/x86/kvm/irq.h b/arch/x86/kvm/irq.h new file mode 100644 index 000000000..fd210cdd4 --- /dev/null +++ b/arch/x86/kvm/irq.h @@ -0,0 +1,130 @@ +/* + * irq.h: in kernel interrupt controller related definitions + * Copyright (c) 2007, Intel Corporation. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License along with + * this program; if not, write to the Free Software Foundation, Inc., 59 Temple + * Place - Suite 330, Boston, MA 02111-1307 USA. + * Authors: + * Yaozu (Eddie) Dong <Eddie.dong@intel.com> + * + */ + +#ifndef __IRQ_H +#define __IRQ_H + +#include <linux/mm_types.h> +#include <linux/hrtimer.h> +#include <linux/kvm_host.h> +#include <linux/spinlock.h> + +#include <kvm/iodev.h> +#include "ioapic.h" +#include "lapic.h" + +#define PIC_NUM_PINS 16 +#define SELECT_PIC(irq) \ + ((irq) < 8 ? KVM_IRQCHIP_PIC_MASTER : KVM_IRQCHIP_PIC_SLAVE) + +struct kvm; +struct kvm_vcpu; + +struct kvm_kpic_state { + u8 last_irr; /* edge detection */ + u8 irr; /* interrupt request register */ + u8 imr; /* interrupt mask register */ + u8 isr; /* interrupt service register */ + u8 priority_add; /* highest irq priority */ + u8 irq_base; + u8 read_reg_select; + u8 poll; + u8 special_mask; + u8 init_state; + u8 auto_eoi; + u8 rotate_on_auto_eoi; + u8 special_fully_nested_mode; + u8 init4; /* true if 4 byte init */ + u8 elcr; /* PIIX edge/trigger selection */ + u8 elcr_mask; + u8 isr_ack; /* interrupt ack detection */ + struct kvm_pic *pics_state; +}; + +struct kvm_pic { + spinlock_t lock; + bool wakeup_needed; + unsigned pending_acks; + struct kvm *kvm; + struct kvm_kpic_state pics[2]; /* 0 is master pic, 1 is slave pic */ + int output; /* intr from master PIC */ + struct kvm_io_device dev_master; + struct kvm_io_device dev_slave; + struct kvm_io_device dev_eclr; + void (*ack_notifier)(void *opaque, int irq); + unsigned long irq_states[PIC_NUM_PINS]; +}; + +int kvm_pic_init(struct kvm *kvm); +void kvm_pic_destroy(struct kvm *kvm); +int kvm_pic_read_irq(struct kvm *kvm); +void kvm_pic_update_irq(struct kvm_pic *s); + +static inline int pic_in_kernel(struct kvm *kvm) +{ + int mode = kvm->arch.irqchip_mode; + + /* Matches smp_wmb() when setting irqchip_mode */ + smp_rmb(); + return mode == KVM_IRQCHIP_KERNEL; +} + +static inline int irqchip_split(struct kvm *kvm) +{ + int mode = kvm->arch.irqchip_mode; + + /* Matches smp_wmb() when setting irqchip_mode */ + smp_rmb(); + return mode == KVM_IRQCHIP_SPLIT; +} + +static inline int irqchip_kernel(struct kvm *kvm) +{ + int mode = kvm->arch.irqchip_mode; + + /* Matches smp_wmb() when setting irqchip_mode */ + smp_rmb(); + return mode == KVM_IRQCHIP_KERNEL; +} + +static inline int irqchip_in_kernel(struct kvm *kvm) +{ + int mode = kvm->arch.irqchip_mode; + + /* Matches smp_wmb() when setting irqchip_mode */ + smp_rmb(); + return mode != KVM_IRQCHIP_NONE; +} + +bool kvm_arch_irqfd_allowed(struct kvm *kvm, struct kvm_irqfd *args); +void kvm_inject_pending_timer_irqs(struct kvm_vcpu *vcpu); +void kvm_inject_apic_timer_irqs(struct kvm_vcpu *vcpu); +void kvm_apic_nmi_wd_deliver(struct kvm_vcpu *vcpu); +void __kvm_migrate_apic_timer(struct kvm_vcpu *vcpu); +void __kvm_migrate_pit_timer(struct kvm_vcpu *vcpu); +void __kvm_migrate_timers(struct kvm_vcpu *vcpu); + +int apic_has_pending_timer(struct kvm_vcpu *vcpu); + +int kvm_setup_default_irq_routing(struct kvm *kvm); +int kvm_setup_empty_irq_routing(struct kvm *kvm); + +#endif |