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 #include <kvm/iodev.h>
   7 #include "irq.h"
   8
   9 struct kvm;
  10 struct 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 #define RTC_GSI 8
  39
  40 struct dest_map {
  41         /* vcpu bitmap where IRQ has been sent */
  42         DECLARE_BITMAP(map, KVM_MAX_VCPU_IDS);
  43
  44         /*
  45          * Vector sent to a given vcpu, only valid when
  46          * the vcpu's bit in map is set
  47          */
  48         u8 vectors[KVM_MAX_VCPU_IDS];
  49 };
  50
  51
  52 struct rtc_status {
  53         int pending_eoi;
  54         struct dest_map dest_map;
  55 };
  56
  57 union kvm_ioapic_redirect_entry {
  58         u64 bits;
  59         struct {
  60                 u8 vector;
  61                 u8 delivery_mode:3;
  62                 u8 dest_mode:1;
  63                 u8 delivery_status:1;
  64                 u8 polarity:1;
  65                 u8 remote_irr:1;
  66                 u8 trig_mode:1;
  67                 u8 mask:1;
  68                 u8 reserve:7;
  69                 u8 reserved[4];
  70                 u8 dest_id;
  71         } fields;
  72 };
  73
  74 struct kvm_ioapic {
  75         u64 base_address;
  76         u32 ioregsel;
  77         u32 id;
  78         u32 irr;
  79         u32 pad;
  80         union kvm_ioapic_redirect_entry redirtbl[IOAPIC_NUM_PINS];
  81         unsigned long irq_states[IOAPIC_NUM_PINS];
  82         struct kvm_io_device dev;
  83         struct kvm *kvm;
  84         spinlock_t lock;
  85         struct rtc_status rtc_status;
  86         struct delayed_work eoi_inject;
  87         u32 irq_eoi[IOAPIC_NUM_PINS];
  88         u32 irr_delivered;
  89 };
  90
  91 #ifdef DEBUG
  92 #define ASSERT(x)                                                       \
  93 do {                                                                    \
  94         if (!(x)) {                                                     \
  95                 printk(KERN_EMERG "assertion failed %s: %d: %s\n",      \
  96                        __FILE__, __LINE__, #x);                         \
  97                 BUG();                                                  \
  98         }                                                               \
  99 } while (0)
 100 #else
 101 #define ASSERT(x) do { } while (0)
 102 #endif
 103
 104 static inline int ioapic_in_kernel(struct kvm *kvm)
 105 {
 106         return irqchip_kernel(kvm);
 107 }
 108
 109 void kvm_rtc_eoi_tracking_restore_one(struct kvm_vcpu *vcpu);
 110 void kvm_ioapic_update_eoi(struct kvm_vcpu *vcpu, int vector,
 111                         int trigger_mode);
 112 int kvm_ioapic_init(struct kvm *kvm);
 113 void kvm_ioapic_destroy(struct kvm *kvm);
 114 int kvm_ioapic_set_irq(struct kvm_ioapic *ioapic, int irq, int irq_source_id,
 115                        int level, bool line_status);
 116 void kvm_ioapic_clear_all(struct kvm_ioapic *ioapic, int irq_source_id);
 117 void kvm_get_ioapic(struct kvm *kvm, struct kvm_ioapic_state *state);
 118 void kvm_set_ioapic(struct kvm *kvm, struct kvm_ioapic_state *state);
 119 void kvm_ioapic_scan_entry(struct kvm_vcpu *vcpu,
 120                            ulong *ioapic_handled_vectors);
 121 void kvm_scan_ioapic_routes(struct kvm_vcpu *vcpu,
 122                             ulong *ioapic_handled_vectors);
 123 #endif