irq.h 2.9 KB

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  1. /* SPDX-License-Identifier: GPL-2.0-only */
  2. /*
  3. * irq.h: in kernel interrupt controller related definitions
  4. * Copyright (c) 2007, Intel Corporation.
  5. *
  6. * Authors:
  7. * Yaozu (Eddie) Dong <Eddie.dong@intel.com>
  8. */
  9. #ifndef __IRQ_H
  10. #define __IRQ_H
  11. #include <linux/mm_types.h>
  12. #include <linux/hrtimer.h>
  13. #include <linux/kvm_host.h>
  14. #include <linux/spinlock.h>
  15. #include <kvm/iodev.h>
  16. #include "lapic.h"
  17. #define PIC_NUM_PINS 16
  18. #define SELECT_PIC(irq) \
  19. ((irq) < 8 ? KVM_IRQCHIP_PIC_MASTER : KVM_IRQCHIP_PIC_SLAVE)
  20. struct kvm;
  21. struct kvm_vcpu;
  22. struct kvm_kpic_state {
  23. u8 last_irr; /* edge detection */
  24. u8 irr; /* interrupt request register */
  25. u8 imr; /* interrupt mask register */
  26. u8 isr; /* interrupt service register */
  27. u8 priority_add; /* highest irq priority */
  28. u8 irq_base;
  29. u8 read_reg_select;
  30. u8 poll;
  31. u8 special_mask;
  32. u8 init_state;
  33. u8 auto_eoi;
  34. u8 rotate_on_auto_eoi;
  35. u8 special_fully_nested_mode;
  36. u8 init4; /* true if 4 byte init */
  37. u8 elcr; /* PIIX edge/trigger selection */
  38. u8 elcr_mask;
  39. u8 isr_ack; /* interrupt ack detection */
  40. struct kvm_pic *pics_state;
  41. };
  42. struct kvm_pic {
  43. spinlock_t lock;
  44. bool wakeup_needed;
  45. unsigned pending_acks;
  46. struct kvm *kvm;
  47. struct kvm_kpic_state pics[2]; /* 0 is master pic, 1 is slave pic */
  48. int output; /* intr from master PIC */
  49. struct kvm_io_device dev_master;
  50. struct kvm_io_device dev_slave;
  51. struct kvm_io_device dev_eclr;
  52. void (*ack_notifier)(void *opaque, int irq);
  53. unsigned long irq_states[PIC_NUM_PINS];
  54. };
  55. int kvm_pic_init(struct kvm *kvm);
  56. void kvm_pic_destroy(struct kvm *kvm);
  57. int kvm_pic_read_irq(struct kvm *kvm);
  58. void kvm_pic_update_irq(struct kvm_pic *s);
  59. static inline int irqchip_split(struct kvm *kvm)
  60. {
  61. int mode = kvm->arch.irqchip_mode;
  62. /* Matches smp_wmb() when setting irqchip_mode */
  63. smp_rmb();
  64. return mode == KVM_IRQCHIP_SPLIT;
  65. }
  66. static inline int irqchip_kernel(struct kvm *kvm)
  67. {
  68. int mode = kvm->arch.irqchip_mode;
  69. /* Matches smp_wmb() when setting irqchip_mode */
  70. smp_rmb();
  71. return mode == KVM_IRQCHIP_KERNEL;
  72. }
  73. static inline int pic_in_kernel(struct kvm *kvm)
  74. {
  75. return irqchip_kernel(kvm);
  76. }
  77. static inline int irqchip_in_kernel(struct kvm *kvm)
  78. {
  79. int mode = kvm->arch.irqchip_mode;
  80. /* Matches smp_wmb() when setting irqchip_mode */
  81. smp_rmb();
  82. return mode != KVM_IRQCHIP_NONE;
  83. }
  84. void kvm_inject_pending_timer_irqs(struct kvm_vcpu *vcpu);
  85. void kvm_inject_apic_timer_irqs(struct kvm_vcpu *vcpu);
  86. void kvm_apic_nmi_wd_deliver(struct kvm_vcpu *vcpu);
  87. void __kvm_migrate_apic_timer(struct kvm_vcpu *vcpu);
  88. void __kvm_migrate_pit_timer(struct kvm_vcpu *vcpu);
  89. void __kvm_migrate_timers(struct kvm_vcpu *vcpu);
  90. int apic_has_pending_timer(struct kvm_vcpu *vcpu);
  91. int kvm_setup_default_irq_routing(struct kvm *kvm);
  92. int kvm_setup_empty_irq_routing(struct kvm *kvm);
  93. int kvm_irq_delivery_to_apic(struct kvm *kvm, struct kvm_lapic *src,
  94. struct kvm_lapic_irq *irq,
  95. struct dest_map *dest_map);
  96. #endif