LXR linux/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
   8struct kvm;
   9struct 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
  42struct rtc_status {
  43        int pending_eoi;
  44        DECLARE_BITMAP(dest_map, KVM_MAX_VCPUS);
  45};
  46
  47union 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
  64struct 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)                                                       \
  85do {                                                                    \
  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
  96static inline struct kvm_ioapic *ioapic_irqchip(struct kvm *kvm)
  97{
  98        return kvm->arch.vioapic;
  99}
 100
 101static 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
 108void kvm_rtc_eoi_tracking_restore_one(struct kvm_vcpu *vcpu);
 109bool kvm_apic_match_dest(struct kvm_vcpu *vcpu, struct kvm_lapic *source,
 110                int short_hand, unsigned int dest, int dest_mode);
 111int kvm_apic_compare_prio(struct kvm_vcpu *vcpu1, struct kvm_vcpu *vcpu2);
 112void kvm_ioapic_update_eoi(struct kvm_vcpu *vcpu, int vector,
 113                        int trigger_mode);
 114int kvm_ioapic_init(struct kvm *kvm);
 115void kvm_ioapic_destroy(struct kvm *kvm);
 116int kvm_ioapic_set_irq(struct kvm_ioapic *ioapic, int irq, int irq_source_id,
 117                       int level, bool line_status);
 118void kvm_ioapic_clear_all(struct kvm_ioapic *ioapic, int irq_source_id);
 119int kvm_irq_delivery_to_apic(struct kvm *kvm, struct kvm_lapic *src,
 120                struct kvm_lapic_irq *irq, unsigned long *dest_map);
 121int kvm_get_ioapic(struct kvm *kvm, struct kvm_ioapic_state *state);
 122int kvm_set_ioapic(struct kvm *kvm, struct kvm_ioapic_state *state);
 123void kvm_ioapic_scan_entry(struct kvm_vcpu *vcpu, u64 *eoi_exit_bitmap,
 124                        u32 *tmr);
 125
 126#endif
 127