Book a Demo!
CoCalc Logo Icon
StoreFeaturesDocsShareSupportNewsAboutPoliciesSign UpSign In
awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/arch/x86/kvm/irq.h
10817 views
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 <[email protected]>

19
 *

20
 */

21


22
#ifndef __IRQ_H

23
#define __IRQ_H

24


25
#include <linux/mm_types.h>

26
#include <linux/hrtimer.h>

27
#include <linux/kvm_host.h>

28
#include <linux/spinlock.h>

29


30
#include "iodev.h"

31
#include "ioapic.h"

32
#include "lapic.h"

33


34
#define PIC_NUM_PINS 16

35
#define SELECT_PIC(irq) \

36
	((irq) < 8 ? KVM_IRQCHIP_PIC_MASTER : KVM_IRQCHIP_PIC_SLAVE)

37


38
struct kvm;

39
struct kvm_vcpu;

40


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;

58
	u8 isr_ack;	/* interrupt ack detection */

59
	struct kvm_pic *pics_state;

60
};

61


62
struct kvm_pic {

63
	spinlock_t lock;

64
	bool wakeup_needed;

65
	unsigned pending_acks;

66
	struct kvm *kvm;

67
	struct kvm_kpic_state pics[2]; /* 0 is master pic, 1 is slave pic */

68
	int output;		/* intr from master PIC */

69
	struct kvm_io_device dev;

70
	void (*ack_notifier)(void *opaque, int irq);

71
	unsigned long irq_states[16];

72
};

73


74
struct kvm_pic *kvm_create_pic(struct kvm *kvm);

75
void kvm_destroy_pic(struct kvm *kvm);

76
int kvm_pic_read_irq(struct kvm *kvm);

77
void kvm_pic_update_irq(struct kvm_pic *s);

78


79
static inline struct kvm_pic *pic_irqchip(struct kvm *kvm)

80
{

81
	return kvm->arch.vpic;

82
}

83


84
static inline int irqchip_in_kernel(struct kvm *kvm)

85
{

86
	int ret;

87


88
	ret = (pic_irqchip(kvm) != NULL);

89
	smp_rmb();

90
	return ret;

91
}

92


93
void kvm_pic_reset(struct kvm_kpic_state *s);

94


95
void kvm_inject_pending_timer_irqs(struct kvm_vcpu *vcpu);

96
void kvm_inject_apic_timer_irqs(struct kvm_vcpu *vcpu);

97
void kvm_apic_nmi_wd_deliver(struct kvm_vcpu *vcpu);

98
void __kvm_migrate_apic_timer(struct kvm_vcpu *vcpu);

99
void __kvm_migrate_pit_timer(struct kvm_vcpu *vcpu);

100
void __kvm_migrate_timers(struct kvm_vcpu *vcpu);

101


102
int apic_has_pending_timer(struct kvm_vcpu *vcpu);

103


104
#endif

105


106