arch/x86/kvm/ioapic.h

   1 #ifndef __KVM_IO_APIC_H
   2 #define __KVM_IO_APIC_H
   3
   4 #include <linux/kvm_host.h>
   5
   6 #include <kvm/iodev.h>
   7
   8 struct kvm;
   9 struct kvm_vcpu;
  10
  11 #define IOAPIC_NUM_PINS  KVM_IOAPIC_NUM_PINS
  12 #define IOAPIC_VERSION_ID 0x11  /* IOAPIC version */
  13 #define IOAPIC_EDGE_TRIG  0
  14 #define IOAPIC_LEVEL_TRIG 1
  15
  16 #define IOAPIC_DEFAULT_BASE_ADDRESS  0xfec00000
  17 #define IOAPIC_MEM_LENGTH            0x100
  18
  19 /* Direct registers. */
  20 #define IOAPIC_REG_SELECT  0x00
  21 #define IOAPIC_REG_WINDOW  0x10
  22
  23 /* Indirect registers. */
  24 #define IOAPIC_REG_APIC_ID 0x00 /* x86 IOAPIC only */
  25 #define IOAPIC_REG_VERSION 0x01
  26 #define IOAPIC_REG_ARB_ID  0x02 /* x86 IOAPIC only */
  27
  28 /*ioapic delivery mode*/
  29 #define IOAPIC_FIXED                    0x0
  30 #define IOAPIC_LOWEST_PRIORITY          0x1
  31 #define IOAPIC_PMI                      0x2
  32 #define IOAPIC_NMI                      0x4
  33 #define IOAPIC_INIT                     0x5
  34 #define IOAPIC_EXTINT                   0x7
  35
  36 #ifdef CONFIG_X86
  37 #define RTC_GSI 8
  38 #else
  39 #define RTC_GSI -1U
  40 #endif
  41
  42 struct rtc_status {
  43         int pending_eoi;
  44         DECLARE_BITMAP(dest_map, KVM_MAX_VCPUS);
  45 };
  46
  47 union kvm_ioapic_redirect_entry {
  48         u64 bits;
  49         struct {
  50                 u8 vector;
  51                 u8 delivery_mode:3;
  52                 u8 dest_mode:1;
  53                 u8 delivery_status:1;
  54                 u8 polarity:1;
  55                 u8 remote_irr:1;
  56                 u8 trig_mode:1;
  57                 u8 mask:1;
  58                 u8 reserve:7;
  59                 u8 reserved[4];
  60                 u8 dest_id;
  61         } fields;
  62 };
  63
  64 struct kvm_ioapic {
  65         u64 base_address;
  66         u32 ioregsel;
  67         u32 id;
  68         u32 irr;
  69         u32 pad;
  70         union kvm_ioapic_redirect_entry redirtbl[IOAPIC_NUM_PINS];
  71         unsigned long irq_states[IOAPIC_NUM_PINS];
  72         struct kvm_io_device dev;
  73         struct kvm *kvm;
  74         void (*ack_notifier)(void *opaque, int irq);
  75         spinlock_t lock;
  76         DECLARE_BITMAP(handled_vectors, 256);
  77         struct rtc_status rtc_status;
  78         struct delayed_work eoi_inject;
  79         u32 irq_eoi[IOAPIC_NUM_PINS];
  80         u32 irr_delivered;
  81 };
  82
  83 #ifdef DEBUG
  84 #define ASSERT(x)                                                       \
  85 do {                                                                    \
  86         if (!(x)) {                                                     \
  87                 printk(KERN_EMERG "assertion failed %s: %d: %s\n",      \
  88                        __FILE__, __LINE__, #x);                         \
  89                 BUG();                                                  \
  90         }                                                               \
  91 } while (0)
  92 #else
  93 #define ASSERT(x) do { } while (0)
  94 #endif
  95
  96 static inline struct kvm_ioapic *ioapic_irqchip(struct kvm *kvm)
  97 {
  98         return kvm->arch.vioapic;
  99 }
 100
 101 static inline bool kvm_ioapic_handles_vector(struct kvm *kvm, int vector)
 102 {
 103         struct kvm_ioapic *ioapic = kvm->arch.vioapic;
 104         smp_rmb();
 105         return test_bit(vector, ioapic->handled_vectors);
 106 }
 107
 108 void kvm_rtc_eoi_tracking_restore_one(struct kvm_vcpu *vcpu);
 109 bool kvm_apic_match_dest(struct kvm_vcpu *vcpu, struct kvm_lapic *source,
 110                 int short_hand, unsigned int dest, int dest_mode);
 111 int kvm_apic_compare_prio(struct kvm_vcpu *vcpu1, struct kvm_vcpu *vcpu2);
 112 void kvm_ioapic_update_eoi(struct kvm_vcpu *vcpu, int vector,
 113                         int trigger_mode);
 114 int kvm_ioapic_init(struct kvm *kvm);
 115 void kvm_ioapic_destroy(struct kvm *kvm);
 116 int kvm_ioapic_set_irq(struct kvm_ioapic *ioapic, int irq, int irq_source_id,
 117                        int level, bool line_status);
 118 void kvm_ioapic_clear_all(struct kvm_ioapic *ioapic, int irq_source_id);
 119 int kvm_irq_delivery_to_apic(struct kvm *kvm, struct kvm_lapic *src,
 120                 struct kvm_lapic_irq *irq, unsigned long *dest_map);
 121 int kvm_get_ioapic(struct kvm *kvm, struct kvm_ioapic_state *state);
 122 int kvm_set_ioapic(struct kvm *kvm, struct kvm_ioapic_state *state);
 123 void kvm_ioapic_scan_entry(struct kvm_vcpu *vcpu, u64 *eoi_exit_bitmap,
 124                         u32 *tmr);
 125
 126 #endif