1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * KVM Microsoft Hyper-V emulation 4 * 5 * derived from arch/x86/kvm/x86.c 6 * 7 * Copyright (C) 2006 Qumranet, Inc. 8 * Copyright (C) 2008 Qumranet, Inc. 9 * Copyright IBM Corporation, 2008 10 * Copyright 2010 Red Hat, Inc. and/or its affiliates. 11 * Copyright (C) 2015 Andrey Smetanin <asmetanin@virtuozzo.com> 12 * 13 * Authors: 14 * Avi Kivity <avi@qumranet.com> 15 * Yaniv Kamay <yaniv@qumranet.com> 16 * Amit Shah <amit.shah@qumranet.com> 17 * Ben-Ami Yassour <benami@il.ibm.com> 18 * Andrey Smetanin <asmetanin@virtuozzo.com> 19 */ 20 21 #ifndef __ARCH_X86_KVM_HYPERV_H__ 22 #define __ARCH_X86_KVM_HYPERV_H__ 23 24 #include <linux/kvm_host.h> 25 26 /* "Hv#1" signature */ 27 #define HYPERV_CPUID_SIGNATURE_EAX 0x31237648 28 29 /* 30 * The #defines related to the synthetic debugger are required by KDNet, but 31 * they are not documented in the Hyper-V TLFS because the synthetic debugger 32 * functionality has been deprecated and is subject to removal in future 33 * versions of Windows. 34 */ 35 #define HYPERV_CPUID_SYNDBG_VENDOR_AND_MAX_FUNCTIONS 0x40000080 36 #define HYPERV_CPUID_SYNDBG_INTERFACE 0x40000081 37 #define HYPERV_CPUID_SYNDBG_PLATFORM_CAPABILITIES 0x40000082 38 39 /* 40 * Hyper-V synthetic debugger platform capabilities 41 * These are HYPERV_CPUID_SYNDBG_PLATFORM_CAPABILITIES.EAX bits. 42 */ 43 #define HV_X64_SYNDBG_CAP_ALLOW_KERNEL_DEBUGGING BIT(1) 44 45 /* Hyper-V Synthetic debug options MSR */ 46 #define HV_X64_MSR_SYNDBG_CONTROL 0x400000F1 47 #define HV_X64_MSR_SYNDBG_STATUS 0x400000F2 48 #define HV_X64_MSR_SYNDBG_SEND_BUFFER 0x400000F3 49 #define HV_X64_MSR_SYNDBG_RECV_BUFFER 0x400000F4 50 #define HV_X64_MSR_SYNDBG_PENDING_BUFFER 0x400000F5 51 #define HV_X64_MSR_SYNDBG_OPTIONS 0x400000FF 52 53 /* Hyper-V HV_X64_MSR_SYNDBG_OPTIONS bits */ 54 #define HV_X64_SYNDBG_OPTION_USE_HCALLS BIT(2) 55 56 static inline struct kvm_hv *to_kvm_hv(struct kvm *kvm) 57 { 58 return &kvm->arch.hyperv; 59 } 60 61 static inline struct kvm_vcpu_hv *to_hv_vcpu(struct kvm_vcpu *vcpu) 62 { 63 return vcpu->arch.hyperv; 64 } 65 66 static inline struct kvm_vcpu_hv_synic *to_hv_synic(struct kvm_vcpu *vcpu) 67 { 68 struct kvm_vcpu_hv *hv_vcpu = to_hv_vcpu(vcpu); 69 70 return &hv_vcpu->synic; 71 } 72 73 static inline struct kvm_vcpu *hv_synic_to_vcpu(struct kvm_vcpu_hv_synic *synic) 74 { 75 struct kvm_vcpu_hv *hv_vcpu = container_of(synic, struct kvm_vcpu_hv, synic); 76 77 return hv_vcpu->vcpu; 78 } 79 80 static inline struct kvm_hv_syndbg *to_hv_syndbg(struct kvm_vcpu *vcpu) 81 { 82 return &vcpu->kvm->arch.hyperv.hv_syndbg; 83 } 84 85 static inline u32 kvm_hv_get_vpindex(struct kvm_vcpu *vcpu) 86 { 87 struct kvm_vcpu_hv *hv_vcpu = to_hv_vcpu(vcpu); 88 89 return hv_vcpu ? hv_vcpu->vp_index : vcpu->vcpu_idx; 90 } 91 92 int kvm_hv_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data, bool host); 93 int kvm_hv_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata, bool host); 94 95 static inline bool kvm_hv_hypercall_enabled(struct kvm_vcpu *vcpu) 96 { 97 return vcpu->arch.hyperv_enabled && to_kvm_hv(vcpu->kvm)->hv_guest_os_id; 98 } 99 100 int kvm_hv_hypercall(struct kvm_vcpu *vcpu); 101 102 void kvm_hv_irq_routing_update(struct kvm *kvm); 103 int kvm_hv_synic_set_irq(struct kvm *kvm, u32 vcpu_id, u32 sint); 104 void kvm_hv_synic_send_eoi(struct kvm_vcpu *vcpu, int vector); 105 int kvm_hv_activate_synic(struct kvm_vcpu *vcpu, bool dont_zero_synic_pages); 106 107 void kvm_hv_vcpu_uninit(struct kvm_vcpu *vcpu); 108 109 bool kvm_hv_assist_page_enabled(struct kvm_vcpu *vcpu); 110 bool kvm_hv_get_assist_page(struct kvm_vcpu *vcpu, 111 struct hv_vp_assist_page *assist_page); 112 113 static inline struct kvm_vcpu_hv_stimer *to_hv_stimer(struct kvm_vcpu *vcpu, 114 int timer_index) 115 { 116 return &to_hv_vcpu(vcpu)->stimer[timer_index]; 117 } 118 119 static inline struct kvm_vcpu *hv_stimer_to_vcpu(struct kvm_vcpu_hv_stimer *stimer) 120 { 121 struct kvm_vcpu_hv *hv_vcpu; 122 123 hv_vcpu = container_of(stimer - stimer->index, struct kvm_vcpu_hv, 124 stimer[0]); 125 return hv_vcpu->vcpu; 126 } 127 128 static inline bool kvm_hv_has_stimer_pending(struct kvm_vcpu *vcpu) 129 { 130 struct kvm_vcpu_hv *hv_vcpu = to_hv_vcpu(vcpu); 131 132 if (!hv_vcpu) 133 return false; 134 135 return !bitmap_empty(hv_vcpu->stimer_pending_bitmap, 136 HV_SYNIC_STIMER_COUNT); 137 } 138 139 void kvm_hv_process_stimers(struct kvm_vcpu *vcpu); 140 141 void kvm_hv_setup_tsc_page(struct kvm *kvm, 142 struct pvclock_vcpu_time_info *hv_clock); 143 void kvm_hv_request_tsc_page_update(struct kvm *kvm); 144 145 void kvm_hv_init_vm(struct kvm *kvm); 146 void kvm_hv_destroy_vm(struct kvm *kvm); 147 int kvm_hv_vcpu_init(struct kvm_vcpu *vcpu); 148 void kvm_hv_set_cpuid(struct kvm_vcpu *vcpu, bool hyperv_enabled); 149 int kvm_hv_set_enforce_cpuid(struct kvm_vcpu *vcpu, bool enforce); 150 int kvm_vm_ioctl_hv_eventfd(struct kvm *kvm, struct kvm_hyperv_eventfd *args); 151 int kvm_get_hv_cpuid(struct kvm_vcpu *vcpu, struct kvm_cpuid2 *cpuid, 152 struct kvm_cpuid_entry2 __user *entries); 153 154 #endif 155