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 dest_map {
  44         /* vcpu bitmap where IRQ has been sent */
  45         DECLARE_BITMAP(map, KVM_MAX_VCPU_ID);
  46
  47         /*
  48          * Vector sent to a given vcpu, only valid when
  49          * the vcpu's bit in map is set
  50          */
  51         u8 vectors[KVM_MAX_VCPU_ID];
  52 };
  53
  54
  55 struct rtc_status {
  56         int pending_eoi;
  57         struct dest_map dest_map;
  58 };
  59
  60 union kvm_ioapic_redirect_entry {
  61         u64 bits;
  62         struct {
  63                 u8 vector;
  64                 u8 delivery_mode:3;
  65                 u8 dest_mode:1;
  66                 u8 delivery_status:1;
  67                 u8 polarity:1;
  68                 u8 remote_irr:1;
  69                 u8 trig_mode:1;
  70                 u8 mask:1;
  71                 u8 reserve:7;
  72                 u8 reserved[4];
  73                 u8 dest_id;
  74         } fields;
  75 };
  76
  77 struct kvm_ioapic {
  78         u64 base_address;
  79         u32 ioregsel;
  80         u32 id;
  81         u32 irr;
  82         u32 pad;
  83         union kvm_ioapic_redirect_entry redirtbl[IOAPIC_NUM_PINS];
  84         unsigned long irq_states[IOAPIC_NUM_PINS];
  85         struct kvm_io_device dev;
  86         struct kvm *kvm;
  87         void (*ack_notifier)(void *opaque, int irq);
  88         spinlock_t lock;
  89         struct rtc_status rtc_status;
  90         struct delayed_work eoi_inject;
  91         u32 irq_eoi[IOAPIC_NUM_PINS];
  92         u32 irr_delivered;
  93 };
  94
  95 #ifdef DEBUG
  96 #define ASSERT(x)                                                       \
  97 do {                                                                    \
  98         if (!(x)) {                                                     \
  99                 printk(KERN_EMERG "assertion failed %s: %d: %s\n",      \
 100                        __FILE__, __LINE__, #x);                         \
 101                 BUG();                                                  \
 102         }                                                               \
 103 } while (0)
 104 #else
 105 #define ASSERT(x) do { } while (0)
 106 #endif
 107
 108 static inline int ioapic_in_kernel(struct kvm *kvm)
 109 {
 110         int mode = kvm->arch.irqchip_mode;
 111
 112         /* Matches smp_wmb() when setting irqchip_mode */
 113         smp_rmb();
 114         return mode == KVM_IRQCHIP_KERNEL;
 115 }
 116
 117 void kvm_rtc_eoi_tracking_restore_one(struct kvm_vcpu *vcpu);
 118 bool kvm_apic_match_dest(struct kvm_vcpu *vcpu, struct kvm_lapic *source,
 119                 int short_hand, unsigned int dest, int dest_mode);
 120 int kvm_apic_compare_prio(struct kvm_vcpu *vcpu1, struct kvm_vcpu *vcpu2);
 121 void kvm_ioapic_update_eoi(struct kvm_vcpu *vcpu, int vector,
 122                         int trigger_mode);
 123 int kvm_ioapic_init(struct kvm *kvm);
 124 void kvm_ioapic_destroy(struct kvm *kvm);
 125 int kvm_ioapic_set_irq(struct kvm_ioapic *ioapic, int irq, int irq_source_id,
 126                        int level, bool line_status);
 127 void kvm_ioapic_clear_all(struct kvm_ioapic *ioapic, int irq_source_id);
 128 int kvm_irq_delivery_to_apic(struct kvm *kvm, struct kvm_lapic *src,
 129                              struct kvm_lapic_irq *irq,
 130                              struct dest_map *dest_map);
 131 void kvm_get_ioapic(struct kvm *kvm, struct kvm_ioapic_state *state);
 132 void kvm_set_ioapic(struct kvm *kvm, struct kvm_ioapic_state *state);
 133 void kvm_ioapic_scan_entry(struct kvm_vcpu *vcpu,
 134                            ulong *ioapic_handled_vectors);
 135 void kvm_scan_ioapic_routes(struct kvm_vcpu *vcpu,
 136                             ulong *ioapic_handled_vectors);
 137 #endif