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_ID + 1); 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_ID + 1]; 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 void (*ack_notifier)(void *opaque, int irq); 85 spinlock_t lock; 86 struct rtc_status rtc_status; 87 struct delayed_work eoi_inject; 88 u32 irq_eoi[IOAPIC_NUM_PINS]; 89 u32 irr_delivered; 90 }; 91 92 #ifdef DEBUG 93 #define ASSERT(x) \ 94 do { \ 95 if (!(x)) { \ 96 printk(KERN_EMERG "assertion failed %s: %d: %s\n", \ 97 __FILE__, __LINE__, #x); \ 98 BUG(); \ 99 } \ 100 } while (0) 101 #else 102 #define ASSERT(x) do { } while (0) 103 #endif 104 105 static inline int ioapic_in_kernel(struct kvm *kvm) 106 { 107 return irqchip_kernel(kvm); 108 } 109 110 void kvm_rtc_eoi_tracking_restore_one(struct kvm_vcpu *vcpu); 111 void kvm_ioapic_update_eoi(struct kvm_vcpu *vcpu, int vector, 112 int trigger_mode); 113 int kvm_ioapic_init(struct kvm *kvm); 114 void kvm_ioapic_destroy(struct kvm *kvm); 115 int kvm_ioapic_set_irq(struct kvm_ioapic *ioapic, int irq, int irq_source_id, 116 int level, bool line_status); 117 void kvm_ioapic_clear_all(struct kvm_ioapic *ioapic, int irq_source_id); 118 void kvm_get_ioapic(struct kvm *kvm, struct kvm_ioapic_state *state); 119 void kvm_set_ioapic(struct kvm *kvm, struct kvm_ioapic_state *state); 120 void kvm_ioapic_scan_entry(struct kvm_vcpu *vcpu, 121 ulong *ioapic_handled_vectors); 122 void kvm_scan_ioapic_routes(struct kvm_vcpu *vcpu, 123 ulong *ioapic_handled_vectors); 124 #endif 125