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#include <kvm/iodev.h>
   7#include "irq.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#define RTC_GSI 8
  39
  40struct 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
  52struct rtc_status {
  53        int pending_eoi;
  54        struct dest_map dest_map;
  55};
  56
  57union 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
  74struct 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)                                                       \
  93do {                                                                    \
  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
 104static inline int ioapic_in_kernel(struct kvm *kvm)
 105{
 106        return irqchip_kernel(kvm);
 107}
 108
 109void kvm_rtc_eoi_tracking_restore_one(struct kvm_vcpu *vcpu);
 110void kvm_ioapic_update_eoi(struct kvm_vcpu *vcpu, int vector,
 111                        int trigger_mode);
 112int kvm_ioapic_init(struct kvm *kvm);
 113void kvm_ioapic_destroy(struct kvm *kvm);
 114int kvm_ioapic_set_irq(struct kvm_ioapic *ioapic, int irq, int irq_source_id,
 115                       int level, bool line_status);
 116void kvm_ioapic_clear_all(struct kvm_ioapic *ioapic, int irq_source_id);
 117void kvm_get_ioapic(struct kvm *kvm, struct kvm_ioapic_state *state);
 118void kvm_set_ioapic(struct kvm *kvm, struct kvm_ioapic_state *state);
 119void kvm_ioapic_scan_entry(struct kvm_vcpu *vcpu,
 120                           ulong *ioapic_handled_vectors);
 121void kvm_scan_ioapic_routes(struct kvm_vcpu *vcpu,
 122                            ulong *ioapic_handled_vectors);
 123#endif
 124