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 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 #ifdef CONFIG_X86 39 #define RTC_GSI 8 40 #else 41 #define RTC_GSI -1U 42 #endif 43 44 struct 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 56 struct rtc_status { 57 int pending_eoi; 58 struct dest_map dest_map; 59 }; 60 61 union 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 78 struct 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) \ 98 do { \ 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 108 109 static 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 } 117 118 void kvm_rtc_eoi_tracking_restore_one(struct kvm_vcpu *vcpu); 119 void kvm_ioapic_update_eoi(struct kvm_vcpu *vcpu, int vector, 120 int trigger_mode); 121 int kvm_ioapic_init(struct kvm *kvm); 122 void kvm_ioapic_destroy(struct kvm *kvm); 123 int kvm_ioapic_set_irq(struct kvm_ioapic *ioapic, int irq, int irq_source_id, 124 int level, bool line_status); 125 void kvm_ioapic_clear_all(struct kvm_ioapic *ioapic, int irq_source_id); 126 void kvm_get_ioapic(struct kvm *kvm, struct kvm_ioapic_state *state); 127 void kvm_set_ioapic(struct kvm *kvm, struct kvm_ioapic_state *state); 128 void kvm_ioapic_scan_entry(struct kvm_vcpu *vcpu, 129 ulong *ioapic_handled_vectors); 130 void kvm_scan_ioapic_routes(struct kvm_vcpu *vcpu, 131 ulong *ioapic_handled_vectors); 132 #endif 133