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 #ifdef CONFIG_KVM_IOAPIC 10 11 struct kvm; 12 struct kvm_vcpu; 13 14 #define IOAPIC_NUM_PINS KVM_IOAPIC_NUM_PINS 15 #define IOAPIC_VERSION_ID 0x11 /* IOAPIC version */ 16 #define IOAPIC_EDGE_TRIG 0 17 #define IOAPIC_LEVEL_TRIG 1 18 19 #define IOAPIC_DEFAULT_BASE_ADDRESS 0xfec00000 20 #define IOAPIC_MEM_LENGTH 0x100 21 22 /* Direct registers. */ 23 #define IOAPIC_REG_SELECT 0x00 24 #define IOAPIC_REG_WINDOW 0x10 25 26 /* Indirect registers. */ 27 #define IOAPIC_REG_APIC_ID 0x00 /* x86 IOAPIC only */ 28 #define IOAPIC_REG_VERSION 0x01 29 #define IOAPIC_REG_ARB_ID 0x02 /* x86 IOAPIC only */ 30 31 /*ioapic delivery mode*/ 32 #define IOAPIC_FIXED 0x0 33 #define IOAPIC_LOWEST_PRIORITY 0x1 34 #define IOAPIC_PMI 0x2 35 #define IOAPIC_NMI 0x4 36 #define IOAPIC_INIT 0x5 37 #define IOAPIC_EXTINT 0x7 38 39 #define RTC_GSI 8 40 41 struct rtc_status { 42 int pending_eoi; 43 44 /* vcpu bitmap where IRQ has been sent */ 45 DECLARE_BITMAP(map, KVM_MAX_VCPU_IDS); 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_IDS]; 52 }; 53 54 union kvm_ioapic_redirect_entry { 55 u64 bits; 56 struct { 57 u8 vector; 58 u8 delivery_mode:3; 59 u8 dest_mode:1; 60 u8 delivery_status:1; 61 u8 polarity:1; 62 u8 remote_irr:1; 63 u8 trig_mode:1; 64 u8 mask:1; 65 u8 reserve:7; 66 u8 reserved[4]; 67 u8 dest_id; 68 } fields; 69 }; 70 71 struct kvm_ioapic { 72 u64 base_address; 73 u32 ioregsel; 74 u32 id; 75 u32 irr; 76 u32 pad; 77 union kvm_ioapic_redirect_entry redirtbl[IOAPIC_NUM_PINS]; 78 unsigned long irq_states[IOAPIC_NUM_PINS]; 79 struct kvm_io_device dev; 80 struct kvm *kvm; 81 spinlock_t lock; 82 struct rtc_status rtc_status; 83 struct delayed_work eoi_inject; 84 u32 irq_eoi[IOAPIC_NUM_PINS]; 85 u32 irr_delivered; 86 87 /* reads protected by irq_srcu, writes by irq_lock */ 88 struct hlist_head mask_notifier_list; 89 }; 90 91 struct kvm_irq_mask_notifier { 92 void (*func)(struct kvm_irq_mask_notifier *kimn, bool masked); 93 int irq; 94 struct hlist_node link; 95 }; 96 97 void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq, 98 struct kvm_irq_mask_notifier *kimn); 99 void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq, 100 struct kvm_irq_mask_notifier *kimn); 101 void kvm_fire_mask_notifiers(struct kvm *kvm, unsigned irqchip, unsigned pin, 102 bool mask); 103 104 void kvm_rtc_eoi_tracking_restore_one(struct kvm_vcpu *vcpu); 105 void kvm_ioapic_update_eoi(struct kvm_vcpu *vcpu, int vector, 106 int trigger_mode); 107 int kvm_ioapic_init(struct kvm *kvm); 108 void kvm_ioapic_destroy(struct kvm *kvm); 109 int kvm_ioapic_set_irq(struct kvm_kernel_irq_routing_entry *e, struct kvm *kvm, 110 int irq_source_id, int level, bool line_status); 111 112 void kvm_get_ioapic(struct kvm *kvm, struct kvm_ioapic_state *state); 113 void kvm_set_ioapic(struct kvm *kvm, struct kvm_ioapic_state *state); 114 void kvm_ioapic_scan_entry(struct kvm_vcpu *vcpu, 115 ulong *ioapic_handled_vectors); 116 #endif /* CONFIG_KVM_IOAPIC */ 117 118 static inline int ioapic_in_kernel(struct kvm *kvm) 119 { 120 return irqchip_full(kvm); 121 } 122 123 void kvm_scan_ioapic_routes(struct kvm_vcpu *vcpu, 124 ulong *ioapic_handled_vectors); 125 void kvm_scan_ioapic_irq(struct kvm_vcpu *vcpu, u32 dest_id, u16 dest_mode, 126 u8 vector, unsigned long *ioapic_handled_vectors); 127 #endif 128