LXR linux/arch/x86/kvm/ioapic.h

   1/* SPDX-License-Identifier: GPL-2.0 */
   2#ifndef __KVM_IO_APIC_H
   3#define __KVM_IO_APIC_H
   4
   5#include <linux/kvm_host.h>
   6
   7#include <kvm/iodev.h>
   8
   9struct kvm;
  10struct kvm_vcpu;
  11
  12#define IOAPIC_NUM_PINS  KVM_IOAPIC_NUM_PINS
  13#define MAX_NR_RESERVED_IOAPIC_PINS KVM_MAX_IRQ_ROUTES
  14#define IOAPIC_VERSION_ID 0x11  /* IOAPIC version */
  15#define IOAPIC_EDGE_TRIG  0
  16#define IOAPIC_LEVEL_TRIG 1
  17
  18#define IOAPIC_DEFAULT_BASE_ADDRESS  0xfec00000
  19#define IOAPIC_MEM_LENGTH            0x100
  20
  21/* Direct registers. */
  22#define IOAPIC_REG_SELECT  0x00
  23#define IOAPIC_REG_WINDOW  0x10
  24
  25/* Indirect registers. */
  26#define IOAPIC_REG_APIC_ID 0x00 /* x86 IOAPIC only */
  27#define IOAPIC_REG_VERSION 0x01
  28#define IOAPIC_REG_ARB_ID  0x02 /* x86 IOAPIC only */
  29
  30/*ioapic delivery mode*/
  31#define IOAPIC_FIXED                    0x0
  32#define IOAPIC_LOWEST_PRIORITY          0x1
  33#define IOAPIC_PMI                      0x2
  34#define IOAPIC_NMI                      0x4
  35#define IOAPIC_INIT                     0x5
  36#define IOAPIC_EXTINT                   0x7
  37
  38#ifdef CONFIG_X86
  39#define RTC_GSI 8
  40#else
  41#define RTC_GSI -1U
  42#endif
  43
  44struct dest_map {
  45        /* vcpu bitmap where IRQ has been sent */
  46        DECLARE_BITMAP(map, KVM_MAX_VCPU_ID);
  47
  48        /*
  49         * Vector sent to a given vcpu, only valid when
  50         * the vcpu's bit in map is set
  51         */
  52        u8 vectors[KVM_MAX_VCPU_ID];
  53};
  54
  55
  56struct rtc_status {
  57        int pending_eoi;
  58        struct dest_map dest_map;
  59};
  60
  61union kvm_ioapic_redirect_entry {
  62        u64 bits;
  63        struct {
  64                u8 vector;
  65                u8 delivery_mode:3;
  66                u8 dest_mode:1;
  67                u8 delivery_status:1;
  68                u8 polarity:1;
  69                u8 remote_irr:1;
  70                u8 trig_mode:1;
  71                u8 mask:1;
  72                u8 reserve:7;
  73                u8 reserved[4];
  74                u8 dest_id;
  75        } fields;
  76};
  77
  78struct kvm_ioapic {
  79        u64 base_address;
  80        u32 ioregsel;
  81        u32 id;
  82        u32 irr;
  83        u32 pad;
  84        union kvm_ioapic_redirect_entry redirtbl[IOAPIC_NUM_PINS];
  85        unsigned long irq_states[IOAPIC_NUM_PINS];
  86        struct kvm_io_device dev;
  87        struct kvm *kvm;
  88        void (*ack_notifier)(void *opaque, int irq);
  89        spinlock_t lock;
  90        struct rtc_status rtc_status;
  91        struct delayed_work eoi_inject;
  92        u32 irq_eoi[IOAPIC_NUM_PINS];
  93        u32 irr_delivered;
  94};
  95
  96#ifdef DEBUG
  97#define ASSERT(x)                                                       \
  98do {                                                                    \
  99        if (!(x)) {                                                     \
 100                printk(KERN_EMERG "assertion failed %s: %d: %s\n",      \
 101                       __FILE__, __LINE__, #x);                         \
 102                BUG();                                                  \
 103        }                                                               \
 104} while (0)
 105#else
 106#define ASSERT(x) do { } while (0)
 107#endif
 108
 109static inline int ioapic_in_kernel(struct kvm *kvm)
 110{
 111        int mode = kvm->arch.irqchip_mode;
 112
 113        /* Matches smp_wmb() when setting irqchip_mode */
 114        smp_rmb();
 115        return mode == KVM_IRQCHIP_KERNEL;
 116}
 117
 118void kvm_rtc_eoi_tracking_restore_one(struct kvm_vcpu *vcpu);
 119bool kvm_apic_match_dest(struct kvm_vcpu *vcpu, struct kvm_lapic *source,
 120                int short_hand, unsigned int dest, int dest_mode);
 121int kvm_apic_compare_prio(struct kvm_vcpu *vcpu1, struct kvm_vcpu *vcpu2);
 122void kvm_ioapic_update_eoi(struct kvm_vcpu *vcpu, int vector,
 123                        int trigger_mode);
 124int kvm_ioapic_init(struct kvm *kvm);
 125void kvm_ioapic_destroy(struct kvm *kvm);
 126int kvm_ioapic_set_irq(struct kvm_ioapic *ioapic, int irq, int irq_source_id,
 127                       int level, bool line_status);
 128void kvm_ioapic_clear_all(struct kvm_ioapic *ioapic, int irq_source_id);
 129int kvm_irq_delivery_to_apic(struct kvm *kvm, struct kvm_lapic *src,
 130                             struct kvm_lapic_irq *irq,
 131                             struct dest_map *dest_map);
 132void kvm_get_ioapic(struct kvm *kvm, struct kvm_ioapic_state *state);
 133void kvm_set_ioapic(struct kvm *kvm, struct kvm_ioapic_state *state);
 134void kvm_ioapic_scan_entry(struct kvm_vcpu *vcpu,
 135                           ulong *ioapic_handled_vectors);
 136void kvm_scan_ioapic_routes(struct kvm_vcpu *vcpu,
 137                            ulong *ioapic_handled_vectors);
 138#endif
 139