kernel/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 MAX_NR_RESERVED_IOAPIC_PINS KVM_MAX_IRQ_ROUTES
  13 #define IOAPIC_VERSION_ID 0x11  /* IOAPIC version */
  14 #define IOAPIC_EDGE_TRIG  0
  15 #define IOAPIC_LEVEL_TRIG 1
  16
  17 #define IOAPIC_DEFAULT_BASE_ADDRESS  0xfec00000
  18 #define IOAPIC_MEM_LENGTH            0x100
  19
  20 /* Direct registers. */
  21 #define IOAPIC_REG_SELECT  0x00
  22 #define IOAPIC_REG_WINDOW  0x10
  23
  24 /* Indirect registers. */
  25 #define IOAPIC_REG_APIC_ID 0x00 /* x86 IOAPIC only */
  26 #define IOAPIC_REG_VERSION 0x01
  27 #define IOAPIC_REG_ARB_ID  0x02 /* x86 IOAPIC only */
  28
  29 /*ioapic delivery mode*/
  30 #define IOAPIC_FIXED                    0x0
  31 #define IOAPIC_LOWEST_PRIORITY          0x1
  32 #define IOAPIC_PMI                      0x2
  33 #define IOAPIC_NMI                      0x4
  34 #define IOAPIC_INIT                     0x5
  35 #define IOAPIC_EXTINT                   0x7
  36
  37 #ifdef CONFIG_X86
  38 #define RTC_GSI 8
  39 #else
  40 #define RTC_GSI -1U
  41 #endif
  42
  43 struct rtc_status {
  44         int pending_eoi;
  45         DECLARE_BITMAP(dest_map, KVM_MAX_VCPUS);
  46 };
  47
  48 union kvm_ioapic_redirect_entry {
  49         u64 bits;
  50         struct {
  51                 u8 vector;
  52                 u8 delivery_mode:3;
  53                 u8 dest_mode:1;
  54                 u8 delivery_status:1;
  55                 u8 polarity:1;
  56                 u8 remote_irr:1;
  57                 u8 trig_mode:1;
  58                 u8 mask:1;
  59                 u8 reserve:7;
  60                 u8 reserved[4];
  61                 u8 dest_id;
  62         } fields;
  63 };
  64
  65 struct kvm_ioapic {
  66         u64 base_address;
  67         u32 ioregsel;
  68         u32 id;
  69         u32 irr;
  70         u32 pad;
  71         union kvm_ioapic_redirect_entry redirtbl[IOAPIC_NUM_PINS];
  72         unsigned long irq_states[IOAPIC_NUM_PINS];
  73         struct kvm_io_device dev;
  74         struct kvm *kvm;
  75         void (*ack_notifier)(void *opaque, int irq);
  76         spinlock_t lock;
  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 int ioapic_in_kernel(struct kvm *kvm)
 102 {
 103         int ret;
 104
 105         ret = (ioapic_irqchip(kvm) != NULL);
 106         return ret;
 107 }
 108
 109 void kvm_rtc_eoi_tracking_restore_one(struct kvm_vcpu *vcpu);
 110 bool kvm_apic_match_dest(struct kvm_vcpu *vcpu, struct kvm_lapic *source,
 111                 int short_hand, unsigned int dest, int dest_mode);
 112 int kvm_apic_compare_prio(struct kvm_vcpu *vcpu1, struct kvm_vcpu *vcpu2);
 113 void kvm_ioapic_update_eoi(struct kvm_vcpu *vcpu, int vector,
 114                         int trigger_mode);
 115 int kvm_ioapic_init(struct kvm *kvm);
 116 void kvm_ioapic_destroy(struct kvm *kvm);
 117 int kvm_ioapic_set_irq(struct kvm_ioapic *ioapic, int irq, int irq_source_id,
 118                        int level, bool line_status);
 119 void kvm_ioapic_clear_all(struct kvm_ioapic *ioapic, int irq_source_id);
 120 int kvm_irq_delivery_to_apic(struct kvm *kvm, struct kvm_lapic *src,
 121                 struct kvm_lapic_irq *irq, unsigned long *dest_map);
 122 int kvm_get_ioapic(struct kvm *kvm, struct kvm_ioapic_state *state);
 123 int kvm_set_ioapic(struct kvm *kvm, struct kvm_ioapic_state *state);
 124 void kvm_ioapic_scan_entry(struct kvm_vcpu *vcpu, u64 *eoi_exit_bitmap);
 125 void kvm_scan_ioapic_routes(struct kvm_vcpu *vcpu, u64 *eoi_exit_bitmap);
 126
 127 #endif