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 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
  43struct 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
  55struct rtc_status {
  56        int pending_eoi;
  57        struct dest_map dest_map;
  58};
  59
  60union 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
  77struct 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)                                                       \
  97do {                                                                    \
  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
 108static 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
 117void kvm_rtc_eoi_tracking_restore_one(struct kvm_vcpu *vcpu);
 118bool kvm_apic_match_dest(struct kvm_vcpu *vcpu, struct kvm_lapic *source,
 119                int short_hand, unsigned int dest, int dest_mode);
 120int kvm_apic_compare_prio(struct kvm_vcpu *vcpu1, struct kvm_vcpu *vcpu2);
 121void kvm_ioapic_update_eoi(struct kvm_vcpu *vcpu, int vector,
 122                        int trigger_mode);
 123int kvm_ioapic_init(struct kvm *kvm);
 124void kvm_ioapic_destroy(struct kvm *kvm);
 125int kvm_ioapic_set_irq(struct kvm_ioapic *ioapic, int irq, int irq_source_id,
 126                       int level, bool line_status);
 127void kvm_ioapic_clear_all(struct kvm_ioapic *ioapic, int irq_source_id);
 128int kvm_irq_delivery_to_apic(struct kvm *kvm, struct kvm_lapic *src,
 129                             struct kvm_lapic_irq *irq,
 130                             struct dest_map *dest_map);
 131void kvm_get_ioapic(struct kvm *kvm, struct kvm_ioapic_state *state);
 132void kvm_set_ioapic(struct kvm *kvm, struct kvm_ioapic_state *state);
 133void kvm_ioapic_scan_entry(struct kvm_vcpu *vcpu,
 134                           ulong *ioapic_handled_vectors);
 135void kvm_scan_ioapic_routes(struct kvm_vcpu *vcpu,
 136                            ulong *ioapic_handled_vectors);
 137#endif
 138